JP5255460B2 - Slab support device - Google Patents

Description

  The present invention relates to a slab support device for a twin drum type continuous casting facility.

  In a twin-drum type continuous casting facility that casts a slab containing unsolidified molten steel in a solidified shell (bag-bound slab), bulging deformation of the slab (the slab is moved in the slab thickness direction by the pressure of the unsolidified molten steel) Conventionally, as the slab support device capable of suppressing the swelling and deformation into a barrel shape, the following are known.

(1) A spacer having a length corresponding to the thickness of the slab is sandwiched between the support rolls, and the support roll is pressed against the slab in this state, so that only the amount corresponding to the bulging deformation amount of the slab is provided to the support roll. A slab support device that can be suppressed by the above.
(2) Further, in such a slab support device, a slab support device in which the length of the spacer and the like can be further controlled using an actuator, a sensor, or the like (see Patent Document 1 below).

Japanese Patent No. 3546244

However, the conventional slab support device has the following problems.
(1) Since the spacer is sandwiched between the support rolls, the accuracy in predicting the spacer length is important. If this spacer length is too longer than the slab thickness, bulging deformation of the bag-bound slab cannot be reliably suppressed, and if the spacer length is too short than the slab thickness, the support roll will be The slab is crushed and deformed.
(2) Also, when casting a slab with a fixed mold, the slab thickness is determined to be substantially constant depending on the mold, but when casting a bag-bound slab with a twin-drum type continuous casting facility. When the casting speed (drum rotation speed) changes at startup, etc., the thickness of the solidified shell changes and the thickness of the bag-bound slab also changes. Therefore, the thickness of the slab is accurate according to the casting speed. It is necessary to make predictions, and such prediction is very difficult.

  Therefore, in view of the above circumstances, the present invention does not require prediction of the change even when the thickness of the slab changes during the casting of the bag-bound slab in the twin-drum continuous casting equipment, and adapts to the change. The slab support device spacing (spacing between the support roll and drum, spacing between the first support roll and the second support roll, spacing between the fixed support and the support roll) is accurately set with a simple configuration. Thus, an object of the present invention is to provide a slab support device that can reliably suppress bulging deformation of a bag-bound slab.

A slab support device according to a first aspect of the present invention for solving the above-described problem includes a first drum having stepped portions at both ends in the drum axial direction, and a second drum having stepped portions at both ends in the drum axial direction, The ends of the first solidified shell solidified on the outer peripheral surface of the first drum and the second solidified shell solidified on the outer peripheral surface of the second drum are formed by the step portion of the first drum and the step portion of the second drum. An unsolidified molten steel-containing portion including unsolidified molten steel between the first solidified shell and the second solidified shell is provided at both ends of the solidified shell crimped portion that has been crimped, and between the first solidified shell and the second solidified shell. A slab support device for a twin-drum type continuous casting facility for casting a slab having a structure at the center,
At least one support roll disposed opposite to the first drum and having stepped portions at both ends in the roll axial direction;
Pressing means,
By the pressing force of the pressing means, the step portion of the support roll and the step portion of the first drum press the solidified shell crimping portion of the slab from both sides in the slab thickness direction, thereby the support roll. And the distance between the first drum and the central part of the support roll in the roll axial direction and the central part of the first drum in the drum axial direction are the thickness of the unsolidified molten steel-containing part of the slab. It is characterized by being configured to be supported from both sides in the vertical direction.

The slab support device of the second invention includes a first drum having stepped portions at both ends in the drum axial direction, and a second drum having stepped portions at both ends in the drum axial direction. The end portions of the first solidified shell solidified on the outer peripheral surface of the second solidified shell and the second solidified shell solidified on the outer peripheral surface of the second drum are pressed together by the step portion of the first drum and the step portion of the second drum. An unsolidified molten steel containing portion including unsolidified molten steel between the first solidified shell and the second solidified shell is provided at the center portion in the slab width direction. A slab support device for a twin drum type continuous casting facility for casting a slab having a structure having:
A fixed support having stepped portions at both ends in the width direction of the slab support surface;
At least one support roll that is disposed opposite to the fixed support and has step portions at both ends in the roll axial direction;
Pressing means,
By the pressing force of the pressing means, the stepped portion of the fixed support and the stepped portion of the support roll press the solidified shell crimping portion of the slab from both sides in the slab thickness direction, thereby The interval between the support rolls is set so that the center part in the width direction of the slab support surface of the fixed support and the center part in the roll axial direction of the support roll are the thickness of the unsolidified molten steel-containing part of the slab. It is characterized by being configured to be supported from both sides in the vertical direction.

According to a third aspect of the present invention, there is provided a slab support device comprising: a first drum having stepped portions at both ends in the drum axial direction; and a second drum having stepped portions at both ends in the drum axial direction. The end portions of the first solidified shell solidified on the outer peripheral surface of the second solidified shell and the second solidified shell solidified on the outer peripheral surface of the second drum are pressed together by the step portion of the first drum and the step portion of the second drum. An unsolidified molten steel containing portion including unsolidified molten steel between the first solidified shell and the second solidified shell is provided at the center portion in the slab width direction. A slab support device for a twin drum type continuous casting facility for casting a slab having a structure having:
At least one set of first support rolls having stepped portions at both ends in the roll axial direction and second support rolls having stepped portions at both ends in the roll axial direction are arranged to face each other.
And a pressing means,
By the pressing force of this pressing means, the step portion of the first support roll and the step portion of the second support roll press the solidified shell pressure-bonding portion of the slab from both sides in the slab thickness direction, The interval between the first support roll and the second support roll is set, and the central part in the roll axial direction of the first support roll and the central part in the roll axial direction of the second support roll are the parts of the slab. The unsolidified molten steel containing portion is configured to be supported from both sides in the slab thickness direction.

The slab support device according to a fourth aspect of the present invention includes a first drum having step portions at both ends in the drum axial direction and a second drum that is a flat drum, and is solidified on the outer peripheral surface of the first drum. Solidified shell crimping in which the ends of the second solidified shell solidified on the outer peripheral surface of the first solidified shell and the second drum are pressure-bonded by the stepped portion of the first drum and both ends of the second drum in the drum axial direction. In the width direction both ends of the slab, and having an unsolidified molten steel containing portion containing unsolidified molten steel between the first solidified shell and the second solidified shell in the center portion of the slab width direction. A slab support device for a twin drum type continuous casting facility for casting a slab,
At least one support roll which is disposed opposite the first drum and which is a flat roll;
Pressing means comprising a spring or a constant pressure cylinder that pushes the support roll toward the first drum ,
By the pressing force of the pressing means, both ends in the roll axis direction of the support roll and the stepped portion of the first drum press the solidified shell pressure-bonding portion of the slab from both sides in the slab thickness direction, The interval between the support roll and the first drum is set, and the central part in the roll axial direction of the support roll and the central part in the drum axial direction of the first drum are the unsolidified molten steel-containing part of the slab. It is characterized by being configured to be supported from both sides in the slab thickness direction.

The slab support device of the fifth invention includes a first drum having step portions at both ends in the drum axial direction and a second drum that is a flat drum, and is solidified on the outer peripheral surface of the first drum. Solidified shell crimping in which the ends of the second solidified shell solidified on the outer peripheral surface of the first solidified shell and the second drum are pressure-bonded by the stepped portion of the first drum and both ends of the second drum in the drum axial direction. In the width direction both ends of the slab, and having an unsolidified molten steel containing portion containing unsolidified molten steel between the first solidified shell and the second solidified shell in the center portion of the slab width direction. A slab support device for a twin drum type continuous casting facility for casting a slab,
A fixed support having stepped portions at both ends in the width direction of the slab support surface;
At least one support roll that is disposed opposite the fixed support and is a flat roll;
Pressing means,
By the pressing force of the pressing means, the stepped portion of the fixed support and both end portions in the roll axial direction of the support roll press the solidified shell crimping portion of the slab from both sides in the slab thickness direction, thereby The space between the fixed support and the support roll is set, and the center portion in the width direction of the slab support surface of the fixed support and the center portion in the roll axial direction of the support roll are the unsolidified molten steel-containing portion of the slab. Is configured to be supported from both sides in the slab thickness direction.

Further, the slab support device of the sixth invention includes a first drum having step portions at both ends in the drum axial direction and a second drum which is a flat drum, and is solidified on the outer peripheral surface of the first drum. Solidified shell crimping in which the ends of the second solidified shell solidified on the outer peripheral surface of the first solidified shell and the second drum are pressure-bonded by the stepped portion of the first drum and both ends of the second drum in the drum axial direction. In the width direction both ends of the slab, and having an unsolidified molten steel containing portion containing unsolidified molten steel between the first solidified shell and the second solidified shell in the center portion of the slab width direction. A slab support device for a twin drum type continuous casting facility for casting a slab,
At least one pair of first support rolls having stepped portions at both ends in the roll axial direction and second support rolls that are flat rolls are arranged to face each other.
And a pressing means,
Due to the pressing force of the pressing means, the step portion of the first support roll and the both ends in the roll axial direction of the second support roll press the solidified shell crimping portion of the slab from both sides in the slab thickness direction. Thus, the distance between the first support roll and the second support roll is set, and the center part in the roll axis direction of the first support roll and the center part in the roll axis direction of the second support roll are The unsolidified molten steel-containing part of the piece is configured to be supported from both sides in the slab thickness direction.

The slab support device of the seventh invention includes a first drum that is a flat drum, and a second drum having step portions at both ends in the drum axial direction, and is solidified on the outer peripheral surface of the first drum. Solidified shell crimping in which the ends of the second solidified shell solidified on the outer peripheral surface of the first solidified shell and the second drum are pressure-bonded by both end portions in the drum axial direction of the first drum and the stepped portion of the second drum. In the width direction both ends of the slab, and having an unsolidified molten steel containing portion containing unsolidified molten steel between the first solidified shell and the second solidified shell in the center portion of the slab width direction. A slab support device for a twin drum type continuous casting facility for casting a slab,
At least one support roll disposed opposite to the first drum and having stepped portions at both ends in the roll axial direction;
Pressing means,
By the pressing force of the pressing means, the step portion of the support roll and the drum axial direction both ends of the first drum press the solidified shell crimping portion of the slab from both sides in the slab thickness direction, The interval between the support roll and the first drum is set, and the central part in the roll axial direction of the support roll and the central part in the drum axial direction of the first drum are the unsolidified molten steel-containing part of the slab. It is characterized by being configured to be supported from both sides in the slab thickness direction.

The slab support device according to an eighth aspect of the present invention includes a first drum that is a flat drum and a second drum that has step portions at both ends in the drum axial direction, and is solidified on the outer peripheral surface of the first drum. Solidified shell crimping in which the ends of the second solidified shell solidified on the outer peripheral surface of the first solidified shell and the second drum are pressure-bonded by both end portions in the drum axial direction of the first drum and the stepped portion of the second drum. In the width direction both ends of the slab, and having an unsolidified molten steel containing portion containing unsolidified molten steel between the first solidified shell and the second solidified shell in the center portion of the slab width direction. A slab support device for a twin drum type continuous casting facility for casting a slab,
A fixed support having a slab support surface;
At least one support roll that is disposed opposite to the fixed support and has step portions at both ends in the roll axial direction;
Pressing means,
Due to the pressing force of the pressing means, both ends in the width direction of the slab support surface of the fixed support and the step portions of the support roll press the solidified shell crimping portion of the slab from both sides in the slab thickness direction. Thus, the interval between the fixed support and the support roll is set, and the center part in the width direction of the slab support surface of the fixed support and the center part in the roll axial direction of the support roll are not The solidified molten steel containing part is configured to be supported from both sides in the slab thickness direction.

Moreover, the slab support device of the ninth invention includes a first drum that is a flat drum and a second drum that has step portions at both ends in the drum axial direction, and is solidified on the outer peripheral surface of the first drum. Solidified shell crimping in which the ends of the second solidified shell solidified on the outer peripheral surface of the first solidified shell and the second drum are pressure-bonded by both end portions in the drum axial direction of the first drum and the stepped portion of the second drum. In the width direction both ends of the slab, and having an unsolidified molten steel containing portion containing unsolidified molten steel between the first solidified shell and the second solidified shell in the center portion of the slab width direction. A slab support device for a twin drum type continuous casting facility for casting a slab,
At least one set of first support rolls that are flat rolls and second support rolls having stepped portions at both ends in the roll axial direction are arranged to face each other.
And a pressing means,
Due to the pressing force of the pressing means, both end portions in the roll axial direction of the first support roll and the step portions of the second support roll press the solidified shell crimping portion of the slab from both sides in the slab thickness direction. Thus, the distance between the first support roll and the second support roll is set, and the center part in the roll axis direction of the first support roll and the center part in the roll axis direction of the second support roll are The unsolidified molten steel-containing part of the piece is configured to be supported from both sides in the slab thickness direction.

A cast piece support device according to a tenth aspect of the present invention includes a first drum having stepped portions at both ends in the drum axial direction, and a second drum having stepped portions at both ends in the drum axial direction. The end portions of the first solidified shell solidified on the outer peripheral surface of the second solidified shell and the second solidified shell solidified on the outer peripheral surface of the second drum are pressed together by the step portion of the first drum and the step portion of the second drum. An unsolidified molten steel-containing portion containing unsolidified molten steel between the first solidified shell and the second solidified shell is provided at the center portion in the slab width direction. A slab support device for a twin drum type continuous casting facility for casting a slab having a structure having:
At least one support roll which is disposed opposite the first drum and which is a flat roll;
An end roll that is disposed opposite to the first drum on both sides in the roll axial direction of the support roll, and is rotatable separately from the support roll;
Pressing means,
By the pressing force of the pressing means, the end roll and the stepped portion of the first drum press the solidified shell pressure-bonding portion of the slab from both sides in the slab thickness direction, whereby the support roll and the The interval between the first drums is set, and the support roll and the drum axial direction center portion of the first drum support the unsolidified molten steel-containing portion of the slab from both sides in the slab thickness direction. It is characterized by that.

An slab support device according to an eleventh aspect of the invention includes a first drum having stepped portions at both ends in the drum axial direction, and a second drum having stepped portions at both ends in the drum axial direction. The end portions of the first solidified shell solidified on the outer peripheral surface of the second solidified shell and the second solidified shell solidified on the outer peripheral surface of the second drum are pressed together by the step portion of the first drum and the step portion of the second drum. An unsolidified molten steel-containing portion containing unsolidified molten steel between the first solidified shell and the second solidified shell is provided at the center portion in the slab width direction. A slab support device for a twin drum type continuous casting facility for casting a slab having a structure having:
A fixed support having stepped portions at both ends in the width direction of the slab support surface;
At least one support roll that is disposed opposite the fixed support and is a flat roll;
An end roll that is disposed opposite to the fixed support on both sides in the roll axial direction of the support roll and is rotatable separately from the support roll;
Pressing means,
By the pressing force of the pressing means, the end roll and the stepped portion of the fixed support press the solidified shell crimping portion of the slab from both sides in the thickness direction of the slab, thereby the fixed support and the support. The interval between the rolls is set, and the center portion in the width direction of the slab support surface of the fixed support and the support roll support the unsolidified molten steel-containing portion of the slab from both sides in the slab thickness direction. It is characterized by having a configuration.

A slab support device according to a twelfth aspect of the invention includes a first drum having step portions at both ends in the drum axial direction, and a second drum having step portions at both ends in the drum axial direction. The end portions of the first solidified shell solidified on the outer peripheral surface of the second solidified shell and the second solidified shell solidified on the outer peripheral surface of the second drum are pressed together by the step portion of the first drum and the step portion of the second drum. An unsolidified molten steel-containing portion containing unsolidified molten steel between the first solidified shell and the second solidified shell is provided at the center portion in the slab width direction. A slab support device for a twin drum type continuous casting facility for casting a slab having a structure having:
At least one set of a first support roll that is a flat roll and a second support roll that is a flat roll are arranged to face each other.
And a first end roll disposed on both sides of the first support roll in the roll axial direction and rotatable separately from the first support roll;
A second end roll disposed on both sides of the second support roll in the roll axial direction and rotatable separately from the second support roll;
Pressing means,
By the pressing force of the pressing means, the first end roll and the second end roll press the solidified shell crimping portion of the slab from both sides in the slab thickness direction, thereby the first support. An interval between the roll and the second support roll is set, and the first support roll and the second support roll support the unsolidified molten steel-containing portion of the slab from both sides in the slab thickness direction. It is characterized by having a configuration.

The slab support device of the thirteenth aspect includes a first drum having step portions at both ends in the drum axial direction and a second drum that is a flat drum, and is solidified on the outer peripheral surface of the first drum. Solidified shell crimping in which the ends of the second solidified shell solidified on the outer peripheral surface of the first solidified shell and the second drum are pressure-bonded by the stepped portion of the first drum and both ends of the second drum in the drum axial direction. In the width direction both ends of the slab, and having an unsolidified molten steel containing portion containing unsolidified molten steel between the first solidified shell and the second solidified shell in the center portion of the slab width direction. A slab support device for a twin drum type continuous casting facility for casting a slab,
At least one set of a first support roll that is a flat roll and a second support roll that is a flat roll are arranged to face each other.
And the end rolls that are arranged on both sides of the first support roll in the roll axial direction and are rotatable separately from the first support roll,
Pressing means,
By the pressing force of this pressing means, both ends in the roll axial direction of the second support roll and the end roll press the solidified shell crimping portion of the slab from both sides in the slab thickness direction. An interval between the first support roll and the second support roll is set, and the center part in the roll axial direction of the first support roll and the second support roll casts the unsolidified molten steel-containing part of the slab. It is characterized by being configured to be supported from both sides in the thickness direction.

A slab support device according to a fourteenth aspect of the invention includes a first drum which is a flat drum, and a second drum having step portions at both ends in the drum axial direction, and is solidified on the outer peripheral surface of the first drum. Solidified shell crimping in which the ends of the second solidified shell solidified on the outer peripheral surface of the first solidified shell and the second drum are pressure-bonded by both end portions in the drum axial direction of the first drum and the stepped portion of the second drum. In the width direction both ends of the slab, and having an unsolidified molten steel containing portion containing unsolidified molten steel between the first solidified shell and the second solidified shell in the center portion of the slab width direction. A slab support device for a twin drum type continuous casting facility for casting a slab,
At least one support roll which is disposed opposite the first drum and which is a flat roll;
An end roll that is disposed opposite to the first drum on both sides in the roll axial direction of the support roll, and is rotatable separately from the support roll;
Pressing means,
By the pressing force of the pressing means, the end roll and both end portions in the drum axial direction of the first drum press the solidified shell crimping portion of the slab from both sides in the slab thickness direction, thereby supporting the support. The distance between the roll and the first drum is set, and the central portion of the support roll and the first drum in the drum axial direction is the unsolidified molten steel-containing portion of the slab from both sides in the slab thickness direction. It is the structure which supported.

The slab support device according to the fifteenth aspect of the present invention includes a first drum that is a flat drum, and a second drum that has step portions at both ends in the drum axial direction, and is solidified on the outer peripheral surface of the first drum. Solidified shell crimping in which the ends of the second solidified shell solidified on the outer peripheral surface of the first solidified shell and the second drum are pressure-bonded by both end portions in the drum axial direction of the first drum and the stepped portion of the second drum. In the width direction both ends of the slab, and having an unsolidified molten steel containing portion containing unsolidified molten steel between the first solidified shell and the second solidified shell in the center portion of the slab width direction. A slab support device for a twin drum type continuous casting facility for casting a slab,
A fixed support having a slab support surface;
At least one support roll that is disposed opposite the fixed support and is a flat roll;
An end roll that is disposed opposite to the fixed support on both sides in the roll axial direction of the support roll and is rotatable separately from the support roll;
Pressing means,
By the pressing force of the pressing means, both ends in the width direction of the slab support surface of the fixed support and the end rolls press the solidified shell crimping portion of the slab from both sides in the slab thickness direction. The space between the fixed support and the support roll is set so that the center portion in the width direction of the slab support surface of the fixed support and the support roll have a thickness of the unsolidified molten steel-containing portion of the slab. It is characterized by being configured to be supported from both sides in the vertical direction.

The slab support device according to the sixteenth aspect of the present invention includes a first drum that is a flat drum, and a second drum having step portions at both ends in the drum axial direction, and is solidified on the outer peripheral surface of the first drum. Solidified shell crimping in which the ends of the second solidified shell solidified on the outer peripheral surface of the first solidified shell and the second drum are pressure-bonded by both end portions in the drum axial direction of the first drum and the stepped portion of the second drum. In the width direction both ends of the slab, and having an unsolidified molten steel containing portion containing unsolidified molten steel between the first solidified shell and the second solidified shell in the center portion of the slab width direction. A slab support device for a twin drum type continuous casting facility for casting a slab,
At least one set of a first support roll that is a flat roll and a second support roll that is a flat roll are arranged to face each other.
And the end rolls arranged on both sides in the roll axial direction of the second support roll and rotatable separately from the second support roll,
Pressing means,
By the pressing force of the pressing means, both ends in the roll axial direction of the first support roll and the end roll press the solidified shell crimping portion of the slab from both sides in the slab thickness direction, thereby The space | interval between a 1st support roll and the said 2nd support roll is set, The roll axial direction center part of the said 1st support roll and the said 2nd support roll cast the said unsolidified molten steel content part of the said slab. It is characterized by being configured to be supported from both sides in the thickness direction.

The slab support device of the seventeenth invention is the slab support device of any of the first to sixteenth inventions,
The set pressing force of the pressing means is equal to or higher than the required pressing force capable of suppressing bulging deformation of the unsolidified molten steel-containing portion, and the end pressure resistance that is the load resistance of the solidified shell crimping portion to the required pressing force. It is characterized in that it is set within a range of a pressing force applied with a load.

In addition to the configuration of each invention as described above, the following configuration may be further used.
That is, the slab support device of the first configuration is the slab support device of the first, second, fourth, fifth, seventh, eighth, tenth, eleventh, fourteenth or fifteenth inventions. A plurality of the support rolls are provided, and the pressing means is provided for each of these support rolls.
Moreover, the slab support device of the second configuration is the slab support device of the third, sixth, ninth, twelfth, thirteenth or sixteenth invention, wherein the first support roll and the second support roll A plurality of sets are provided, and the pressing means is provided for each set.
The slab support device of the third configuration is the slab support device of the first, second, fourth, fifth, seventh, eighth, tenth, eleventh, fourteenth or fifteenth inventions. A plurality of the support rolls are provided, and the pressing means is provided so as to integrally press the plurality of support rolls as a whole.
Further, a slab support device having a fourth structure is the slab support device according to the third, sixth, ninth, twelfth, thirteenth or sixteenth invention, wherein the first support roll and the second support roll are provided. A plurality of sets is provided, and the pressing means is provided so as to integrally press the plurality of support rolls as a whole.

According to the slab support device of the first invention, the first drum includes a first drum having step portions at both ends in the drum axial direction, and a second drum having step portions at both ends in the drum axial direction. The end portions of the first solidified shell solidified on the outer peripheral surface of the second solidified shell and the second solidified shell solidified on the outer peripheral surface of the second drum are pressed together by the step portion of the first drum and the step portion of the second drum. An unsolidified molten steel-containing portion containing unsolidified molten steel between the first solidified shell and the second solidified shell is provided at the center portion in the slab width direction. A slab support device for a twin-drum type continuous casting facility for casting a slab having a structure having at least one support roll disposed opposite to the first drum and having stepped portions at both ends in the roll axial direction, and pressing Means for the pressing force of the pressing means. Then, the step portion of the support roll and the step portion of the first drum press the solidified shell crimping portion of the slab from both sides in the thickness direction of the slab, thereby the support roll and the first drum. The center portion in the roll axial direction of the support roll and the central portion in the drum axial direction of the first drum are configured so that the unsolidified molten steel-containing portion of the slab is separated from both sides in the slab thickness direction. Because it is characterized by having a structure that supports it, even if the thickness of the slab changes during the casting of the bag-bound slab in the twin-drum type continuous casting equipment, the change follows (easily follows) the change. The distance between the support roll and the first drum is set with high accuracy based on the solidified shell crimping portion of the slab.
Accordingly, since the distance between the central portion of the support roll in the roll axial direction and the central portion of the first drum in the drum axial direction is also set with high precision, the central portion of the support roll in the roll axial direction and the drum axial direction of the first drum are set. The central portion supports (presses) the unsolidified molten steel-containing portion of the slab from both sides in the slab thickness direction, so that bulging deformation of the unsolidified molten steel-containing portion of the slab can be reliably suppressed.
In this case, the pressing force of the pressing means is such that the step portion of the support roll and the step portion of the first drum press the solidified shell crimping portion of the slab from both sides in the slab thickness direction. By setting the interval between the support roll and the first drum, the center part in the roll axial direction of the support roll and the central part in the drum axial direction of the first drum are cast into the unsolidified molten steel-containing part of the slab. When supported (pressed) from both sides in the thickness direction, it is equal to or higher than the minimum pressing force capable of suppressing bulging deformation of the unsolidified molten steel-containing portion of the slab, and the step portion of the support roll and the first It is sufficient that the stepped portion of the drum is within the range of the maximum pressing force that does not cause crushing of the solidified shell crimping portion of the slab.
Furthermore, according to the slab support device of the first invention, since the support roll is pressed against the slab by the pressing means, the influence can be reduced even if the support roll is misaligned.
In addition, since the allowable setting range of the pressing force is wide and it is not necessary to set the pressing force with high accuracy, a simple device such as a spring or a constant pressure cylinder can be used as the pressing means, and a conventional bulging force can be obtained. A complicated operation of accurately estimating and setting the interval between the support roll and the first drum and an accurate positioning device are unnecessary.
Further, it is possible to reduce the waste of applying an excessive pressing force to the slab due to an estimation error of the pressing force.
Further, since the distance between the support roll and the first drum is set by mechanical positioning, positioning sensors and control devices are unnecessary.
Moreover, since this slab support device has a very simple configuration, it is easy to manufacture and can reduce costs.
Moreover, since the slab is supported between the support roll and the first drum and is pressed against the first drum by the pressing force of the pressing means, the cooling effect of the slab by the first drum can be expected.

According to the slab support device of the second aspect of the invention, the first drum includes a first drum having stepped portions at both ends in the drum axial direction, and a second drum having stepped portions at both ends in the drum axial direction. The end portions of the first solidified shell solidified on the outer peripheral surface of the second solidified shell and the second solidified shell solidified on the outer peripheral surface of the second drum are pressed together by the step portion of the first drum and the step portion of the second drum. An unsolidified molten steel-containing portion containing unsolidified molten steel between the first solidified shell and the second solidified shell is provided at the center portion in the slab width direction. A slab support device for a twin-drum continuous casting facility for casting a slab having a structure having a fixed support having step portions at both ends in the width direction of the slab support surface, and a roll disposed opposite to the fixed support At least one support with stepped portions at both axial ends And the pressing means, the stepped portion of the fixed support and the stepped portion of the support roll cause the solidified shell crimping portion of the slab to move in the slab thickness direction. By pressing from both sides, a distance between the fixed support and the support roll is set, and the center part in the width direction of the slab support surface of the fixed support and the center part in the roll axial direction of the support roll are in the casting direction. Since the unsolidified molten steel-containing part of the piece is configured to be supported from both sides in the thickness direction of the slab, the thickness of the slab is reduced during the casting of the bag-bound slab with the twin drum continuous casting equipment. Even in the case of a change, the distance between the fixed support and the support roll is accurately set based on the solidified shell crimping portion of the slab according to the change (following easily).
Therefore, since the distance between the center portion in the width direction of the slab support surface of the fixed support and the center portion in the roll axis direction of the support roll is also set with high accuracy, The center part in the roll axis direction of the support roll supports (presses) the unsolidified molten steel containing part of the slab from both sides in the slab thickness direction, thereby reliably suppressing bulging deformation of the unsolidified molten steel containing part of the slab. can do.
In this case, the pressing force of the pressing means is such that the stepped portion of the fixed support and the stepped portion of the support roll press the solidified shell crimping portion of the slab from both sides in the slab thickness direction. By setting the distance between the fixed support and the support roll, the center part in the width direction of the slab support surface of the fixed support and the center part in the roll axial direction of the support roll cast the unsolidified molten steel-containing part of the slab. When supported (pressed) from both sides in the thickness direction, it is more than the minimum pressing force that can suppress bulging deformation of the unsolidified molten steel-containing part of the slab, and the step and support of the fixed support It is sufficient that the stepped portion of the roll is within a range not exceeding the maximum pressing force that does not cause crushing of the solidified shell crimping portion of the slab.
Furthermore, according to the slab support device of the second invention, since the support roll is pressed against the slab by the pressing means, the influence can be reduced even if the support roll has misalignment.
In addition, since the allowable setting range of the pressing force is wide and it is not necessary to set the pressing force with high accuracy, a simple device such as a spring or a constant pressure cylinder can be used as the pressing means, and a conventional bulging force can be obtained. There is no need for complicated operations such as accurately estimating and setting the interval between the fixed support and the support roll, and a highly accurate positioning device.
Further, it is possible to reduce the waste of applying an excessive pressing force to the slab due to an estimation error of the pressing force.
Further, since the distance between the fixed support and the support roll is set by mechanical positioning, positioning sensors and control devices are unnecessary.
Moreover, since this slab support device has a very simple configuration, it is easy to manufacture and can reduce costs.

According to the slab support device of the third aspect of the invention, the first drum includes a first drum having step portions at both ends in the drum axial direction, and a second drum having step portions at both ends in the drum axial direction. The end portions of the first solidified shell solidified on the outer peripheral surface of the second solidified shell and the second solidified shell solidified on the outer peripheral surface of the second drum are pressed together by the step portion of the first drum and the step portion of the second drum. An unsolidified molten steel-containing portion containing unsolidified molten steel between the first solidified shell and the second solidified shell is provided at the center portion in the slab width direction. A slab support device for a twin-drum type continuous casting facility for casting a slab having a structure having at least one pair of first support rolls having step portions at both ends in the roll axial direction, and at both ends in the roll axial direction A second support roll having a stepped portion, and opposingly arranged, and A pressing means, and the pressing portion of the pressing means causes the stepped portion of the first support roll and the stepped portion of the second support roll to move the solidified shell crimping portion of the slab in the slab thickness direction. By pressing from both sides, the distance between the first support roll and the second support roll is set, and the central part in the roll axial direction of the first support roll and the central part in the roll axial direction of the second support roll However, since the unsolidified molten steel-containing portion of the slab is supported from both sides in the slab thickness direction, the slab is formed during the casting of the bag-bound slab with a twin-drum type continuous casting facility. Even if the thickness of the slab changes, the distance between the first support roll and the second support roll can be accurately set based on the solidified shell crimping part of the slab according to the change (following easily) Is done.
Accordingly, since the distance between the central portion in the roll axial direction of the first support roll and the central portion in the roll axial direction of the second support roll is also set with high accuracy, the central portion in the roll axial direction of the first support roll and the second central portion The center part in the roll axis direction of the support roll supports (presses) the unsolidified molten steel containing part of the slab from both sides in the slab thickness direction, thereby reliably suppressing bulging deformation of the unsolidified molten steel containing part of the slab. can do.
In this case, the pressing force of the pressing means is such that the step portion of the first support roll and the step portion of the second support roll cause the solidified shell crimping portion of the slab to move in the slab thickness direction. By pressing from both sides, an interval between the first support roll and the second support roll is set, and the central part in the roll axial direction of the first support roll and the central part in the roll axial direction of the second support roll are cast pieces. When the unsolidified molten steel-containing part is supported (pressed) from both sides in the slab thickness direction, the bulging deformation of the unsolidified molten steel-containing part of the slab is not less than the minimum pressing force, and The step portion of the first support roll and the step portion of the second support roll may be within the range of the maximum pressing force that does not cause crushing of the solidified shell crimping portion of the slab.
Furthermore, according to the slab support device of the third invention, since the support roll is pressed against the slab by the pressing means, the influence can be reduced even if the support roll has misalignment.
In addition, since the allowable setting range of the pressing force is wide and it is not necessary to set the pressing force with high accuracy, a simple device such as a spring or a constant pressure cylinder can be used as the pressing means, and a conventional bulging force can be obtained. There is no need for complicated operations such as accurately estimating and setting the interval between the first support roll and the second support roll, and a highly accurate positioning device.
Further, it is possible to reduce the waste of applying an excessive pressing force to the slab due to an estimation error of the pressing force.
Further, since the interval between the first support roll and the second support roll is set by mechanical positioning, a positioning sensor and a control device are unnecessary.
Moreover, since this slab support device has a very simple configuration, it is easy to manufacture and can reduce costs.

According to the slab support device of the fourth aspect of the present invention, the slab support device includes the first drum having step portions at both ends in the drum axial direction and the second drum which is a flat drum, and is solidified on the outer peripheral surface of the first drum. Solidified shell crimping in which the ends of the second solidified shell solidified on the outer peripheral surface of the first solidified shell and the second drum are pressure-bonded by the stepped portion of the first drum and both ends of the second drum in the drum axial direction. In the width direction both ends of the slab, and having an unsolidified molten steel containing portion containing unsolidified molten steel between the first solidified shell and the second solidified shell in the center portion of the slab width direction. A slab support device of a twin-drum type continuous casting facility for casting a slab, comprising: at least one support roll which is disposed to face the first drum and which is a flat roll; and a pressing means. Depending on the pressing force of the means, the front Both end portions of the support roll in the axial direction of the roll and the stepped portion of the first drum press the solidified shell crimping portion of the slab from both sides in the thickness direction of the slab, whereby the support roll and the first drum The interval between the support rolls and the central portion in the roll axial direction of the support drum and the central portion in the drum axial direction of the first drum support the unsolidified molten steel-containing portion of the slab from both sides in the slab thickness direction. Because it is characterized by the fact that it is configured, even if the thickness of the slab changes during the casting of the bag-bound slab in a twin-drum continuous casting facility, it supports according to the change (follows easily) The interval between the roll and the first drum is accurately set with reference to the solidified shell crimping portion of the slab.
Accordingly, since the distance between the central portion of the support roll in the roll axial direction and the central portion of the first drum in the drum axial direction is also set with high precision, the central portion of the support roll in the roll axial direction and the drum axial direction of the first drum are set. The central portion supports (presses) the unsolidified molten steel-containing portion of the slab from both sides in the slab thickness direction, so that bulging deformation of the unsolidified molten steel-containing portion of the slab can be reliably suppressed.
In this case, the pressing force of the pressing means is such that the both ends in the roll axial direction of the support roll and the step portion of the first drum cause the solidified shell crimping portion of the slab to move in the slab thickness direction. By pressing from both sides, an interval between the support roll and the first drum is set, and the center part in the roll axial direction of the support roll and the central part in the drum axial direction of the first drum are the unsolidified molten steel-containing part of the slab. When the slab is supported (pressed) from both sides in the slab thickness direction, the roll shaft of the support roll is equal to or higher than the minimum pressing force capable of suppressing bulging deformation of the unsolidified molten steel-containing portion of the slab. It is only necessary that both the direction end portions and the step portion of the first drum are within the range of the maximum pressing force that does not cause crushing of the solidified shell crimping portion of the slab.
Furthermore, according to the slab support device of the fourth invention, since the support roll is pressed against the slab by the pressing means, the influence can be reduced even if the support roll has misalignment.
In addition, since the allowable setting range of the pressing force is wide and it is not necessary to set the pressing force with high accuracy, a simple device such as a spring or a constant pressure cylinder can be used as the pressing means, and a conventional bulging force can be obtained. A complicated operation of accurately estimating and setting the interval between the support roll and the first drum and an accurate positioning device are unnecessary.
Further, it is possible to reduce the waste of applying an excessive pressing force to the slab due to an estimation error of the pressing force.
Further, since the distance between the support roll and the first drum is set by mechanical positioning, positioning sensors and control devices are unnecessary.
Moreover, since this slab support device has a very simple configuration, it is easy to manufacture and can reduce costs.
Moreover, since the slab is supported between the support roll and the first drum and is pressed against the first drum by the pressing force of the pressing means, the cooling effect of the slab by the first drum can be expected.

According to the slab support device of the fifth aspect of the present invention, the slab support device includes the first drum having step portions at both ends in the drum axial direction and the second drum which is a flat drum, and is solidified on the outer peripheral surface of the first drum. Solidified shell crimping in which the ends of the second solidified shell solidified on the outer peripheral surface of the first solidified shell and the second drum are pressure-bonded by the stepped portion of the first drum and both ends of the second drum in the drum axial direction. In the width direction both ends of the slab, and having an unsolidified molten steel containing portion containing unsolidified molten steel between the first solidified shell and the second solidified shell in the center portion of the slab width direction. A slab support device for a twin-drum type continuous casting facility for casting a slab, comprising a fixed support having step portions at both ends in the width direction of a slab support surface, and a flat roll disposed opposite to the fixed support. At least one support roll; Pressure means, and by the pressing force of the pressing means, the stepped portion of the fixed support and both end portions in the roll axis direction of the support roll cause the solidified shell crimping portion of the slab to move in the slab thickness direction. By pressing from both sides, an interval between the fixed support and the support roll is set, and the center portion in the width direction of the slab support surface of the fixed support and the center portion in the roll axial direction of the support roll are in the casting direction. Since the unsolidified molten steel-containing part of the piece is configured to be supported from both sides in the thickness direction of the slab, the thickness of the slab is reduced during the casting of the bag-bound slab with the twin drum continuous casting equipment. Even in the case of a change, the distance between the fixed support and the support roll is accurately set based on the solidified shell crimping portion of the slab according to the change (following easily).
Therefore, since the distance between the center portion in the width direction of the slab support surface of the fixed support and the center portion in the roll axis direction of the support roll is also set with high accuracy, The center part in the roll axis direction of the support roll supports (presses) the unsolidified molten steel containing part of the slab from both sides in the slab thickness direction, thereby reliably suppressing bulging deformation of the unsolidified molten steel containing part of the slab. can do.
In this case, the pressing force of the pressing means is such that the stepped portion of the fixed support and the both ends in the roll axis direction of the support roll are pressed against the solidified shell crimping portion of the slab by both sides of the slab thickness direction. The distance between the fixed support and the support roll is set by pressing from the center of the slab support surface of the fixed support and the center of the support roll in the roll axial direction. When the portion is supported (pressed) from both sides in the thickness direction of the slab, it is equal to or higher than the minimum pressing force capable of suppressing bulging deformation of the unsolidified molten steel-containing portion of the slab, and the fixed support stage It suffices if both end portions in the roll axis direction of the portion and the support roll are within the range of the maximum pressing force or less that does not cause crushing of the solidified shell crimping portion of the slab.
Furthermore, according to the slab support device of the fifth invention, since the support roll is pressed against the slab by the pressing means, the influence can be reduced even if the support roll has misalignment.
In addition, since the allowable setting range of the pressing force is wide and it is not necessary to set the pressing force with high accuracy, a simple device such as a spring or a constant pressure cylinder can be used as the pressing means, and a conventional bulging force can be obtained. There is no need for complicated operations such as accurately estimating and setting the interval between the fixed support and the support roll, and a highly accurate positioning device.
Further, it is possible to reduce the waste of applying an excessive pressing force to the slab due to an estimation error of the pressing force.
Further, since the distance between the fixed support and the support roll is set by mechanical positioning, positioning sensors and control devices are unnecessary.
Moreover, since this slab support device has a very simple configuration, it is easy to manufacture and can reduce costs.

According to the slab support device of the sixth aspect of the present invention, the slab support device includes a first drum having step portions at both ends in the drum axial direction, and a second drum that is a flat drum. The solidified first solidified shell and the end of the second solidified shell solidified on the outer peripheral surface of the second drum are coagulated by the step of the first drum and both ends of the second drum in the drum axial direction. A shell crimping portion is provided at both ends of the slab width direction, and an unsolidified molten steel containing portion including unsolidified molten steel is provided at the center portion of the slab width direction between the first solidified shell and the second solidified shell. A slab support device of a twin-drum type continuous casting facility for casting a slab having a structure, wherein at least one pair of a first support roll having step portions at both ends in the roll axial direction and a second support which is a flat roll Rolls facing each other and pressing The step portion of the first support roll and the both end portions in the roll axial direction of the second support roll cause the solidified shell crimping portion of the slab to have a thickness of the slab by the pressing force of the pressing means. By pressing from both sides in the direction, the distance between the first support roll and the second support roll is set, and the central part of the first support roll in the roll axial direction and the roll axial direction of the second support roll Since the center part is characterized in that the unsolidified molten steel-containing part of the slab is supported from both sides in the slab thickness direction, the bag-bound slab is being cast in a twin-drum type continuous casting facility. Even if the thickness of the slab changes, the distance between the first support roll and the second support roll can be accurately adjusted according to the change based on the solidified shell crimping part of the slab. Well set That.
Accordingly, since the distance between the central portion in the roll axial direction of the first support roll and the central portion in the roll axial direction of the second support roll is also set with high accuracy, the central portion in the roll axial direction of the first support roll and the second central portion The center part in the roll axis direction of the support roll supports (presses) the unsolidified molten steel containing part of the slab from both sides in the slab thickness direction, thereby reliably suppressing bulging deformation of the unsolidified molten steel containing part of the slab. can do.
In this case, the pressing force of the pressing means is such that the stepped portion of the first support roll and the both end portions in the roll axial direction of the second support roll form the solidified shell crimping portion of the slab by the pressing force of the pressing means. By pressing from both sides in the vertical direction, the distance between the first support roll and the second support roll is set, and the central part in the roll axial direction of the first support roll and the central part in the roll axial direction of the second support roll are When the unsolidified molten steel containing part of the slab is supported (pressed) from both sides in the thickness direction of the slab, the bulging deformation of the unsolidified molten steel containing part of the slab can be suppressed to a minimum pressing force or more. Yes, and the step part of the first support roll and the both end parts in the roll axial direction of the second support roll may be within the range of the maximum pressing force that does not cause crushing of the solidified shell crimping part of the slab. .
Furthermore, according to the slab support device of the sixth invention, since the support roll is pressed against the slab by the pressing means, even if the support roll has misalignment, the influence can be reduced.
In addition, since the allowable setting range of the pressing force is wide and it is not necessary to set the pressing force with high accuracy, a simple device such as a spring or a constant pressure cylinder can be used as the pressing means, and a conventional bulging force can be obtained. There is no need for complicated operations such as accurately estimating and setting the interval between the first support roll and the second support roll, and a highly accurate positioning device.
Further, it is possible to reduce the waste of applying an excessive pressing force to the slab due to an estimation error of the pressing force.
Further, since the interval between the first support roll and the second support roll is set by mechanical positioning, a positioning sensor and a control device are unnecessary.
Moreover, since this slab support device has a very simple configuration, it is easy to manufacture and can reduce costs.

Moreover, according to the slab support device of the seventh aspect of the invention, the slab support device includes a first drum that is a flat drum, and a second drum having stepped portions at both ends in the drum axial direction. The solidified first solidified shell and the end of the second solidified shell solidified on the outer peripheral surface of the second drum are solidified by pressure bonding between both end portions of the first drum in the axial direction of the drum and the step of the second drum. A shell crimping portion is provided at both ends of the slab width direction, and an unsolidified molten steel containing portion including unsolidified molten steel is provided at the center portion of the slab width direction between the first solidified shell and the second solidified shell. A slab support device for a twin-drum type continuous casting facility for casting a slab having a structure, wherein the slab support device is disposed opposite to the first drum and has step portions at both ends in the roll axial direction, and pressing means Of the pressing means By the pressure, the step portion of the support roll and the both end portions in the drum axial direction of the first drum press the solidified shell crimping portion of the slab from both sides in the slab thickness direction, so that the support roll and the An interval between the first drums is set, and a central part in the roll axial direction of the support roll and a central part in the drum axial direction of the first drum are the unsolidified molten steel-containing part of the slab in the slab thickness direction. Because it is characterized by having a structure that supports both sides of the slab, even if the thickness of the slab changes during casting of the bag-bound slab in the twin-drum continuous casting equipment, The distance between the support roll and the first drum is accurately set with reference to the solidified shell crimping portion of the slab.
Accordingly, since the distance between the central portion of the support roll in the roll axial direction and the central portion of the first drum in the drum axial direction is also set with high precision, the central portion of the support roll in the roll axial direction and the drum axial direction of the first drum are set. The central portion supports (presses) the unsolidified molten steel-containing portion of the slab from both sides in the slab thickness direction, so that bulging deformation of the unsolidified molten steel-containing portion of the slab can be reliably suppressed.
In this case, the pressing force of the pressing means is such that the stepped portion of the support roll and the both ends of the first drum in the drum axial direction cause the solidified shell crimping portion of the slab to move in the slab thickness direction. By pressing from both sides, an interval between the support roll and the first drum is set, and the center part in the roll axial direction of the support roll and the central part in the drum axial direction of the first drum are the unsolidified molten steel-containing part of the slab. When the slab is supported (pressed) from both sides in the slab thickness direction, it is equal to or higher than the minimum pressing force capable of suppressing bulging deformation of the unsolidified molten steel-containing part of the slab, and the step portion of the support roll And both ends of the first drum in the axial direction of the first drum may be within the range of the maximum pressing force that does not cause crushing of the solidified shell crimping portion of the slab.
Furthermore, according to the slab support device of the seventh invention, since the support roll is pressed against the slab by the pressing means, the influence can be reduced even if the support roll has misalignment.
In addition, since the allowable setting range of the pressing force is wide and it is not necessary to set the pressing force with high accuracy, a simple device such as a spring or a constant pressure cylinder can be used as the pressing means, and a conventional bulging force can be obtained. A complicated operation of accurately estimating and setting the interval between the support roll and the first drum and an accurate positioning device are unnecessary.
Further, it is possible to reduce the waste of applying an excessive pressing force to the slab due to an estimation error of the pressing force.
Further, since the distance between the support roll and the first drum is set by mechanical positioning, positioning sensors and control devices are unnecessary.
Moreover, since this slab support device has a very simple configuration, it is easy to manufacture and can reduce costs.
Moreover, since the slab is supported between the support roll and the first drum and is pressed against the first drum by the pressing force of the pressing means, the cooling effect of the slab by the first drum can be expected.

Moreover, according to the slab support device of the eighth aspect of the present invention, the slab support device includes a first drum that is a flat drum, and a second drum that has step portions at both ends in the drum axial direction. The solidified first solidified shell and the end of the second solidified shell solidified on the outer peripheral surface of the second drum are solidified by pressure bonding between both end portions of the first drum in the axial direction of the drum and the step of the second drum. A shell crimping portion is provided at both ends of the slab width direction, and an unsolidified molten steel containing portion including unsolidified molten steel is provided at the center portion of the slab width direction between the first solidified shell and the second solidified shell. A slab support device for a twin-drum type continuous casting facility for casting a slab having a structure, and a fixed support having a slab support surface, and stepped portions at both ends in the roll axial direction, which are disposed opposite to the fixed support. At least one support roll and press And the both ends in the width direction of the slab support surface of the fixed support and the stepped portion of the support roll make the slab thickness of the solidified shell crimping part of the slab by the pressing force of the pressing means. By pressing from both sides in the vertical direction, a distance between the fixed support and the support roll is set, and a central portion in the width direction of the slab support surface of the fixed support and a central portion in the roll axial direction of the support roll are Since the unsolidified molten steel-containing portion of the slab is supported from both sides in the slab thickness direction, the double-drum continuous casting equipment is used to cast the bag-bound slab during casting. Even when the thickness changes, the interval between the fixed support and the support roll is accurately set based on the solidified shell crimping portion of the slab according to the change (following easily).
Therefore, since the distance between the center portion in the width direction of the slab support surface of the fixed support and the center portion in the roll axis direction of the support roll is also set with high accuracy, The center part in the roll axis direction of the support roll supports (presses) the unsolidified molten steel containing part of the slab from both sides in the slab thickness direction, thereby reliably suppressing bulging deformation of the unsolidified molten steel containing part of the slab. can do.
In this case, the pressing force of the pressing means is such that the both ends in the width direction of the slab support surface of the fixed support and the stepped portion of the support roll are formed by the slab thickness of the slab by the pressing force of the pressing support. By pressing from both sides in the vertical direction, the distance between the fixed support and the support roll is set, and the center part in the width direction of the slab support surface of the fixed support and the center part in the roll axial direction of the support roll are When the unsolidified molten steel-containing part is supported (pressed) from both sides in the slab thickness direction, it is equal to or higher than the minimum pressing force capable of suppressing bulging deformation of the unsolidified molten steel-containing part of the slab, and The width direction both ends of the slab support surface of the fixed support and the step portion of the support roll may be within the range of the maximum pressing force that does not cause crushing of the solidified shell crimping portion of the slab.
Furthermore, according to the slab support device of the eighth invention, since the support roll is pressed against the slab by the pressing means, the influence can be reduced even if the support roll has misalignment.
In addition, since the allowable setting range of the pressing force is wide and it is not necessary to set the pressing force with high accuracy, a simple device such as a spring or a constant pressure cylinder can be used as the pressing means, and a conventional bulging force can be obtained. There is no need for complicated operations such as accurately estimating and setting the interval between the fixed support and the support roll, and a highly accurate positioning device.
Further, it is possible to reduce the waste of applying an excessive pressing force to the slab due to an estimation error of the pressing force.
Further, since the distance between the fixed support and the support roll is set by mechanical positioning, positioning sensors and control devices are unnecessary.
Moreover, since this slab support device has a very simple configuration, it is easy to manufacture and can reduce costs.

Moreover, according to the slab support device of the ninth aspect of the present invention, the slab support device includes a first drum that is a flat drum and a second drum having step portions at both ends in the drum axial direction. The solidified first solidified shell and the end of the second solidified shell solidified on the outer peripheral surface of the second drum are solidified by pressure bonding between both end portions of the first drum in the axial direction of the drum and the step of the second drum. A shell crimping portion is provided at both ends of the slab width direction, and an unsolidified molten steel containing portion including unsolidified molten steel is provided at the center portion of the slab width direction between the first solidified shell and the second solidified shell. A slab support device for a twin-drum continuous casting facility for casting a slab having a structure, wherein at least one pair of a first support roll that is a flat roll and a second support having stepped portions at both ends in the roll axial direction Rolls facing each other and pressing Means, and both ends of the first support roll in the axial direction of the roll and the stepped portion of the second support roll cause the solidified shell crimping portion of the slab to have a thickness of the slab by the pressing force of the pressing means. By pressing from both sides in the direction, the distance between the first support roll and the second support roll is set, and the central part of the first support roll in the roll axial direction and the roll axial direction of the second support roll Since the center part is characterized in that the unsolidified molten steel-containing part of the slab is supported from both sides in the slab thickness direction, the bag-bound slab is being cast in a twin-drum type continuous casting facility. Even if the thickness of the slab changes, the distance between the first support roll and the second support roll can be accurately adjusted according to the change based on the solidified shell crimping part of the slab. Well set That.
Accordingly, since the distance between the central portion in the roll axial direction of the first support roll and the central portion in the roll axial direction of the second support roll is also set with high accuracy, the central portion in the roll axial direction of the first support roll and the second central portion The center part in the roll axis direction of the support roll supports (presses) the unsolidified molten steel containing part of the slab from both sides in the slab thickness direction, thereby reliably suppressing bulging deformation of the unsolidified molten steel containing part of the slab. can do.
In this case, the pressing force of the pressing means is such that the both ends in the roll axial direction of the first support roll and the stepped portions of the second support roll are formed by the slab thickness of the solidified shell pressing portion of the slab. By pressing from both sides in the vertical direction, the distance between the first support roll and the second support roll is set, and the central part in the roll axial direction of the first support roll and the central part in the roll axial direction of the second support roll are When the unsolidified molten steel containing part of the slab is supported (pressed) from both sides in the thickness direction of the slab, the bulging deformation of the unsolidified molten steel containing part of the slab can be suppressed to a minimum pressing force or more. Yes, as long as both ends of the first support roll in the roll axial direction and the stepped portions of the second support roll are within the range of the maximum pressing force that does not cause crushing of the solidified shell crimping portion of the slab. .
Furthermore, according to the slab support device of the third invention, since the support roll is pressed against the slab by the pressing means, the influence can be reduced even if the support roll has misalignment.
In addition, since the allowable setting range of the pressing force is wide and it is not necessary to set the pressing force with high accuracy, a simple device such as a spring or a constant pressure cylinder can be used as the pressing means, and a conventional bulging force can be obtained. There is no need for complicated operations such as accurately estimating and setting the interval between the first support roll and the second support roll, and a highly accurate positioning device.
Further, it is possible to reduce the waste of applying an excessive pressing force to the slab due to an estimation error of the pressing force.
Further, since the interval between the first support roll and the second support roll is set by mechanical positioning, a positioning sensor and a control device are unnecessary.
Moreover, since this slab support device has a very simple configuration, it is easy to manufacture and can reduce costs.

According to the slab support device of the tenth aspect of the present invention, the first drum includes a first drum having step portions at both ends in the drum axial direction, and a second drum having step portions at both ends in the drum axial direction. The end portions of the first solidified shell solidified on the outer peripheral surface of the second solidified shell and the second solidified shell solidified on the outer peripheral surface of the second drum are pressed together by the step portion of the first drum and the step portion of the second drum. An unsolidified molten steel-containing portion containing unsolidified molten steel between the first solidified shell and the second solidified shell is provided at the center portion in the slab width direction. A slab support device for a twin-drum type continuous casting facility that casts a slab having a structure having at least one support roll that is opposed to the first drum and that is a flat roll, and a roll axial direction of the support roll The first driver on both sides And an end roll that is rotatable separately from the support roll, and a pressing means, and a step portion of the end roll and the first drum by a pressing force of the pressing means. However, by pressing the solidified shell crimping portion of the slab from both sides in the slab thickness direction, an interval between the support roll and the first drum is set, and the support roll and the first drum The center portion in the drum axial direction of the slab is configured to support the unsolidified molten steel-containing portion of the slab from both sides in the slab thickness direction. Even when the thickness of the slab changes during casting, the distance between the support roll and the first drum is adjusted based on the solidified shell crimping part of the slab in accordance with the change (following easily). Set accurately.
Therefore, since the distance between the support roll and the central portion of the first drum in the drum axial direction is also set with high accuracy, the central portion of the support roll and the first drum in the drum axial direction is the unsolidified molten steel-containing portion of the slab. Is supported (pressed) from both sides in the thickness direction of the slab, so that bulging deformation of the unsolidified molten steel-containing portion of the slab can be reliably suppressed.
In this case, the pressing force of the pressing means is such that the end roll and the step portion of the first drum press the solidified shell crimping part of the slab from both sides in the slab thickness direction by the pressing force of the pressing means. Thus, the interval between the support roll and the first drum is set, and the support roll and the central portion in the drum axial direction of the first drum support the unsolidified molten steel-containing portion of the slab from both sides in the slab thickness direction. (Pressing) is not less than the minimum pressing force capable of suppressing the bulging deformation of the unsolidified molten steel-containing portion of the slab, and the end roll and the step portion of the first drum are What is necessary is just to be within the range of the maximum pressing force that does not cause crushing of the solidified shell crimping portion.
Furthermore, according to the slab support device of the tenth invention, since the support roll is pressed against the slab by the pressing means, the influence can be reduced even if the support roll has misalignment.
In addition, since the allowable setting range of the pressing force is wide and it is not necessary to set the pressing force with high accuracy, a simple device such as a spring or a constant pressure cylinder can be used as the pressing means, and a conventional bulging force can be obtained. A complicated operation of accurately estimating and setting the interval between the support roll and the first drum and an accurate positioning device are unnecessary.
Further, it is possible to reduce the waste of applying an excessive pressing force to the slab due to an estimation error of the pressing force.
Further, since the distance between the support roll and the first drum is set by mechanical positioning, positioning sensors and control devices are unnecessary.
Moreover, since this slab support device has a very simple configuration, it is easy to manufacture and can reduce costs.
Moreover, since the slab is supported between the support roll and the first drum and is pressed against the first drum by the pressing force of the pressing means, the cooling effect of the slab by the first drum can be expected.
And furthermore, since the end roll which can be rotated separately from the support roll is provided, even if the outer diameter (peripheral speed) of the support roll and the end roll is different, the support roll or the end roll and the slab Slipping can be prevented.

According to an slab support device of an eleventh aspect of the invention, the first drum includes a first drum having step portions at both ends in the drum axial direction, and a second drum having step portions at both ends in the drum axial direction. The end portions of the first solidified shell solidified on the outer peripheral surface of the second solidified shell and the second solidified shell solidified on the outer peripheral surface of the second drum are pressed together by the step portion of the first drum and the step portion of the second drum. An unsolidified molten steel-containing portion containing unsolidified molten steel between the first solidified shell and the second solidified shell is provided at the center portion in the slab width direction. A slab support device for a twin-drum type continuous casting facility for casting a slab having a structure having a fixed support having step portions at both ends in the width direction of a slab support surface, and a flat support disposed opposite to the fixed support. At least one support roll that is a role; The support roll is disposed opposite to the fixed support on both sides in the roll axial direction, and includes an end roll that can be rotated separately from the support roll, and pressing means, and by the pressing force of the pressing means, The step between the end roll and the fixed support presses the solidified shell crimping portion of the slab from both sides in the slab thickness direction, thereby setting a distance between the fixed support and the support roll. The center portion in the width direction of the slab support surface of the fixed support and the support roll support the unsolidified molten steel-containing portion of the slab from both sides in the slab thickness direction. Therefore, even if the thickness of the slab changes during casting of the bag-bound slab in the twin-drum type continuous casting equipment, the fixed support and the support roll Spacing is accurately set based on the solidified shell crimp portion of the slab.
Accordingly, since the distance between the center portion in the width direction of the slab support surface of the fixed support and the support roll is also set with high accuracy, the center portion in the width direction of the slab support surface of the fixed support and the support roll are By supporting (pressing) the unsolidified molten steel-containing portion from both sides in the slab thickness direction, bulging deformation of the unsolidified molten steel-containing portion of the slab can be reliably suppressed.
In this case, the pressing force of the pressing means is such that the step portion of the end roll and the fixed support presses the solidified shell crimping portion of the slab from both sides in the slab thickness direction. The distance between the fixed support and the support roll is set, and the center part in the width direction of the slab support surface of the fixed support and the support roll support the unsolidified molten steel-containing part of the slab from both sides in the slab thickness direction. When pressed, it is equal to or higher than the minimum pressing force capable of suppressing bulging deformation of the unsolidified molten steel-containing part of the slab, and the end roll and the stepped portion of the fixed support are solidified of the slab. What is necessary is just to be in the range below the maximum pressing force which does not crush the shell crimping part.
Furthermore, according to the slab support device of the eleventh aspect of the invention, since the support roll is pressed against the slab by the pressing means, the influence can be reduced even if the support roll has misalignment.
In addition, since the allowable setting range of the pressing force is wide and it is not necessary to set the pressing force with high accuracy, a simple device such as a spring or a constant pressure cylinder can be used as the pressing means, and a conventional bulging force can be obtained. There is no need for complicated operations such as accurately estimating and setting the interval between the fixed support and the support roll, and a highly accurate positioning device.
Further, it is possible to reduce the waste of applying an excessive pressing force to the slab due to an estimation error of the pressing force.
In addition, since the interval between the fixed support and the support roll is set by mechanical positioning, positioning sensors and control devices are unnecessary.
Moreover, since this slab support device has a very simple configuration, it is easy to manufacture and can reduce costs.
And furthermore, since the end roll which can be rotated separately from the support roll is provided, even if the outer diameter (peripheral speed) of the support roll and the end roll is different, the support roll or the end roll and the slab Slipping can be prevented.

According to a slab support device of a twelfth aspect of the present invention, the slab support device includes a first drum having stepped portions at both ends in the drum axial direction, and a second drum having stepped portions at both ends in the drum axial direction. The end portions of the first solidified shell solidified on the outer peripheral surface of the second solidified shell and the second solidified shell solidified on the outer peripheral surface of the second drum are pressed together by the step portion of the first drum and the step portion of the second drum. An unsolidified molten steel-containing portion containing unsolidified molten steel between the first solidified shell and the second solidified shell is provided at the center portion in the slab width direction. A slab support device for a twin-drum type continuous casting facility for casting a slab having a structure having at least one pair of a first support roll that is a flat roll and a second support roll that is a flat roll. And the first support row A first end roll which is disposed on both sides in the roll axial direction of the first support roll and rotatable separately from the first support roll; and is disposed on both sides in the roll axial direction of the second support roll, and the second support. A second end roll that can be rotated separately from the roll and a pressing means are provided. By the pressing force of the pressing means, the first end roll and the second end roll are By pressing the solidified shell crimping part from both sides in the slab thickness direction, a distance between the first support roll and the second support roll is set, and the first support roll and the second support roll are set. However, the unsolidified molten steel-containing part of the slab is supported from both sides in the slab thickness direction. The thickness of the has changed Even if, in accordance with the change (with easily follow) the distance between the first support roll and the second support roll is set accurately with respect to the solidified shell crimp portion of the slab.
Accordingly, the first support roll and the second support roll support (press) the unsolidified molten steel-containing portion of the slab from both sides in the thickness direction of the slab, thereby causing bulging deformation of the unsolidified molten steel-containing portion of the slab. It can be surely suppressed.
In this case, the pressing force of the pressing means is such that the first end roll and the second end roll press the solidified shell crimping portion of the slab from both sides in the slab thickness direction. By setting the distance between the first support roll and the second support roll, the first support roll and the second support roll support the unsolidified molten steel-containing portion of the slab from both sides in the slab thickness direction. (Pressing) It is more than the minimum pressing force that can suppress the bulging deformation of the unsolidified molten steel-containing part of the slab, and the first end roll and the second end roll are the slab. As long as it is within the range of the maximum pressing force with no fear of crushing the solidified shell crimping portion.
Furthermore, according to the slab support device of the twelfth aspect, since the support roll is pressed against the slab by the pressing means, the influence can be reduced even if the support roll has misalignment.
In addition, since the allowable setting range of the pressing force is wide and it is not necessary to set the pressing force with high accuracy, a simple device such as a spring or a constant pressure cylinder can be used as the pressing means, and a conventional bulging force can be obtained. There is no need for complicated operations such as accurately estimating and setting the interval between the first support roll and the second support roll, and a highly accurate positioning device.
Further, it is possible to reduce the waste of applying an excessive pressing force to the slab due to an estimation error of the pressing force.
Further, since the interval between the first support roll and the second support roll is set by mechanical positioning, a positioning sensor and a control device are unnecessary.
Moreover, since this slab support device has a very simple configuration, it is easy to manufacture and can reduce costs.
And furthermore, since the 1st end roll which can be rotated separately from the 1st support roll, and the 2nd end roll which can be rotated separately from the 2nd support roll, the 1st and 1st support rolls, Prevent slipping between the first and second support rolls and the first and second end rolls and the slab even if the outer diameters (circumferential speeds) of the first and second end rolls are different. Can do.

According to the slab support device of the thirteenth aspect of the present invention, the slab support device includes the first drum having step portions at both ends in the drum axial direction and the second drum that is a flat drum, and is solidified on the outer peripheral surface of the first drum. Solidified shell crimping in which the ends of the second solidified shell solidified on the outer peripheral surface of the first solidified shell and the second drum are pressure-bonded by the stepped portion of the first drum and both ends of the second drum in the drum axial direction. In the width direction both ends of the slab, and having an unsolidified molten steel containing portion containing unsolidified molten steel between the first solidified shell and the second solidified shell in the center portion of the slab width direction. A slab support device for a twin-drum continuous casting facility for casting a slab, wherein at least one pair of a first support roll that is a flat roll and a second support roll that is a flat roll are arranged to face each other, and The first support roll An end roll disposed on both sides in the roll axis direction and rotatable separately from the first support roll, and a pressing means, and a roll of the second support roll by a pressing force of the pressing means Both end portions in the axial direction and the end portion rolls press the solidified shell crimping portion of the slab from both sides in the thickness direction of the slab, thereby reducing the distance between the first support roll and the second support roll. The roll axial direction center part of the first support roll and the second support roll is configured to support the unsolidified molten steel-containing part of the slab from both sides in the slab thickness direction. Therefore, even if the thickness of the slab changes during the casting of the bag-bound slab in a twin-drum type continuous casting facility, the first support roll and the second support follow the change. roll Spacing between is set accurately with respect to the solidified shell crimp portion of the slab.
Therefore, since the interval between the first support roll and the central portion of the second support roll in the roll axial direction is also set with high accuracy, the central portion of the first support roll and the second support roll in the roll axial direction is a slab. By supporting (pressing) the unsolidified molten steel-containing portion from both sides in the slab thickness direction, bulging deformation of the unsolidified molten steel-containing portion of the slab can be reliably suppressed.
In this case, the pressing force of the pressing means is such that both ends of the second support roll in the roll axial direction and the end rolls press the solidified shell crimping portion of the slab on both sides of the slab thickness direction. The distance between the first support roll and the second support roll is set by pressing, and the center part in the roll axial direction of the first support roll and the second support roll is the unsolidified molten steel-containing part of the slab. Roll of the second support roll that is above the minimum pressing force that can suppress bulging deformation of the unsolidified molten steel-containing portion of the slab when supported (pressed) from both sides in the slab thickness direction. The axial direction both ends and the end rolls only need to be within the range of the maximum pressing force that does not cause crushing of the solidified shell crimping portion of the slab.
Furthermore, according to the slab support device of the thirteenth aspect, since the support roll is pressed against the slab by the pressing means, the influence can be reduced even if the support roll has misalignment.
In addition, since the allowable setting range of the pressing force is wide and it is not necessary to set the pressing force with high accuracy, a simple device such as a spring or a constant pressure cylinder can be used as the pressing means, and a conventional bulging force can be obtained. There is no need for complicated operations such as accurately estimating and setting the interval between the first support roll and the second support roll, and a highly accurate positioning device.
Further, it is possible to reduce the waste of applying an excessive pressing force to the slab due to an estimation error of the pressing force.
Further, since the interval between the first support roll and the second support roll is set by mechanical positioning, a positioning sensor and a control device are unnecessary.
Moreover, since this slab support device has a very simple configuration, it is easy to manufacture and can reduce costs.
And furthermore, since the end roll which can be rotated separately from the first support roll is provided, even if the outer diameter (peripheral speed) of the first support roll and the end roll is different, the first support roll and the end roll It is possible to prevent slipping between the roll and the slab.

According to the slab support device of the fourteenth aspect of the present invention, the slab support device includes a first drum that is a flat drum, and a second drum that has step portions at both ends in the drum axial direction. The solidified first solidified shell and the end of the second solidified shell solidified on the outer peripheral surface of the second drum are solidified by pressure bonding between both end portions of the first drum in the axial direction of the drum and the step of the second drum. A shell crimping portion is provided at both ends of the slab width direction, and an unsolidified molten steel containing portion including unsolidified molten steel is provided at the center portion of the slab width direction between the first solidified shell and the second solidified shell. A slab support device for a twin-drum continuous casting facility for casting a slab having a structure, wherein the support roll is a flat roll disposed opposite to the first drum, and both sides of the support roll in the roll axial direction. In An end roll disposed opposite to the one drum and rotatable separately from the support roll, and a pressing means are provided. By the pressing force of the pressing means, the end roll and the first drum Both ends of the drum axial direction press the solidified shell crimping portion of the slab from both sides in the slab thickness direction, thereby setting an interval between the support roll and the first drum, and the support roll And the drum axially central portion of the first drum is configured to support the unsolidified molten steel-containing portion of the slab from both sides in the slab thickness direction. Even when the thickness of the slab changes during the casting of the bag-bound slab, the distance between the support roll and the first drum is adjusted in accordance with the change (following the change easily). Accuracy based on Ku is set.
Therefore, since the distance between the support roll and the central portion of the first drum in the drum axial direction is also set with high accuracy, the central portion of the support roll and the first drum in the drum axial direction is the unsolidified molten steel-containing portion of the slab. Is supported (pressed) from both sides in the thickness direction of the slab, so that bulging deformation of the unsolidified molten steel-containing portion of the slab can be reliably suppressed.
In this case, the pressing force of the pressing means is such that the pressing force of the pressing means causes the end roll and both ends of the first drum in the drum axial direction to pass the solidified shell crimping portion of the slab from both sides in the slab thickness direction. By pressing, the distance between the support roll and the first drum is set, and the center part in the drum axial direction of the support roll and the first drum is the unsolidified molten steel-containing part of the slab on both sides in the slab thickness direction. When it is supported (pressed) from the end roll, both ends of the end roll and the first drum in the drum axial direction are equal to or higher than the minimum pressing force capable of suppressing bulging deformation of the unsolidified molten steel-containing portion. However, what is necessary is just to be in the range below the maximum pressing force without the possibility of crushing the solidified shell crimping portion of the slab.
Furthermore, according to the slab support device of the fourteenth aspect, since the support roll is pressed against the slab by the pressing means, the influence can be reduced even if the support roll has misalignment.
In addition, since the allowable setting range of the pressing force is wide and it is not necessary to set the pressing force with high accuracy, a simple device such as a spring or a constant pressure cylinder can be used as the pressing means, and a conventional bulging force can be obtained. A complicated operation of accurately estimating and setting the interval between the support roll and the first drum and an accurate positioning device are unnecessary.
Further, it is possible to reduce the waste of applying an excessive pressing force to the slab due to an estimation error of the pressing force.
Further, since the distance between the support roll and the first drum is set by mechanical positioning, positioning sensors and control devices are unnecessary.
Moreover, since this slab support device has a very simple configuration, it is easy to manufacture and can reduce costs.
Moreover, since the slab is supported between the support roll and the first drum and is pressed against the first drum by the pressing force of the pressing means, the cooling effect of the slab by the first drum can be expected.
And furthermore, since the end roll which can be rotated separately from the support roll is provided, even if the outer diameter (peripheral speed) of the support roll and the end roll is different, the support roll or the end roll and the slab Slipping can be prevented.

Moreover, according to the slab support device of the fifteenth aspect of the present invention, the slab support device includes a first drum that is a flat drum, and a second drum that has step portions at both ends in the drum axial direction. The solidified first solidified shell and the end of the second solidified shell solidified on the outer peripheral surface of the second drum are solidified by pressure bonding between both end portions of the first drum in the axial direction of the drum and the step of the second drum. A shell crimping portion is provided at both ends of the slab width direction, and an unsolidified molten steel containing portion including unsolidified molten steel is provided at the center portion of the slab width direction between the first solidified shell and the second solidified shell. A slab support device of a twin-drum type continuous casting facility for casting a slab having a structure, comprising: a fixed support having a slab support surface; and at least one support roll which is disposed to face the fixed support and which is a flat roll , Said support And an end roll which is disposed opposite to the fixed support on both sides in the roll axial direction of the tool and is rotatable separately from the support roll, and pressing means. Both ends in the width direction of the slab support surface of the fixed support and the end rolls press the solidified shell crimping portion of the slab from both sides in the thickness direction of the slab, so that the fixed support and the support roll A configuration in which an interval is set, and the center portion in the width direction of the slab support surface of the fixed support and the support roll support the unsolidified molten steel-containing portion of the slab from both sides in the slab thickness direction; As a result, even if the thickness of the slab changes during the casting of the bag-bound slab in a twin-drum continuous casting facility, the fixed support and support are adapted to the change (following easily). Spacing between Lumpur is accurately set based on the solidified shell crimp portion of the slab.
Accordingly, since the distance between the center portion in the width direction of the slab support surface of the fixed support and the support roll is also set with high accuracy, the center portion in the width direction of the slab support surface of the fixed support and the support roll are By supporting (pressing) the unsolidified molten steel-containing portion from both sides in the slab thickness direction, bulging deformation of the unsolidified molten steel-containing portion of the slab can be reliably suppressed.
In this case, the pressing force of the pressing means is such that the both ends in the width direction of the slab support surface of the fixed support and the end rolls push the solidified shell crimping portion of the slab in the slab thickness direction. The distance between the fixed support and the support roll is set by pressing from both sides of the slab, and the center part in the width direction of the slab support surface of the fixed support and the support roll are cast into the slab containing the unsolidified molten steel When supported (pressed) from both sides in the thickness direction, it is above the minimum pressing force that can suppress bulging deformation of the unsolidified molten steel-containing part of the slab, and the slab support surface of the fixed support It suffices if the width direction both ends and the end roll are within the range of the maximum pressing force that does not cause crushing of the solidified shell crimping portion of the slab.
Furthermore, according to the slab support device of the fifteenth aspect of the invention, since the support roll is pressed against the slab by the pressing means, even if the support roll has misalignment, the influence can be reduced.
In addition, since the allowable setting range of the pressing force is wide and it is not necessary to set the pressing force with high accuracy, a simple device such as a spring or a constant pressure cylinder can be used as the pressing means, and a conventional bulging force can be obtained. There is no need for complicated operations such as accurately estimating and setting the interval between the fixed support and the support roll, and a highly accurate positioning device.
Further, it is possible to reduce the waste of applying an excessive pressing force to the slab due to an estimation error of the pressing force.
Further, since the distance between the fixed support and the support roll is set by mechanical positioning, positioning sensors and control devices are unnecessary.
Moreover, since this slab support device has a very simple configuration, it is easy to manufacture and can reduce costs.
And furthermore, since the end roll which can be rotated separately from the support roll is provided, even if the outer diameter (peripheral speed) of the support roll and the end roll is different, the support roll or the end roll and the slab Slipping can be prevented.

According to the slab support device of the sixteenth aspect of the present invention, the slab support device includes a first drum that is a flat drum, and a second drum having stepped portions at both ends in the drum axial direction. The solidified first solidified shell and the end of the second solidified shell solidified on the outer peripheral surface of the second drum are solidified by pressure bonding between both end portions of the first drum in the axial direction of the drum and the step of the second drum. A shell crimping portion is provided at both ends of the slab width direction, and an unsolidified molten steel containing portion including unsolidified molten steel is provided at the center portion of the slab width direction between the first solidified shell and the second solidified shell. A slab support device for a twin drum type continuous casting facility for casting a slab having a structure, wherein at least one pair of a first support roll that is a flat roll and a second support roll that is a flat roll are arranged to face each other. And the second support And an end roll which is disposed on both sides in the roll axial direction of the tool and is rotatable separately from the second support roll, and a pressing means, and the first support is provided by the pressing force of the pressing means. Between the first support roll and the second support roll, both ends of the roll in the axial direction of the roll and the end roll press the solidified shell crimping portion of the slab from both sides in the thickness direction of the slab. And the second support roll supports the unsolidified molten steel-containing part of the slab from both sides in the slab thickness direction. Therefore, even if the thickness of the slab changes during casting of the bag-bound slab in a twin-drum continuous casting facility, the first support roll Second support Spacing between Lumpur is accurately set based on the solidified shell crimp portion of the slab.
Therefore, since the interval between the central portion of the first support roll in the roll axial direction and the second support roll is also set with high accuracy, the central portion of the first support roll in the axial direction of the roll and the second support roll are made of slab. By supporting (pressing) the unsolidified molten steel-containing portion from both sides in the slab thickness direction, bulging deformation of the unsolidified molten steel-containing portion of the slab can be reliably suppressed.
In this case, the pressing force of the pressing means is such that the both ends of the first support roll in the roll axial direction and the end rolls press the solidified shell crimping portion of the slab on both sides of the slab thickness direction. The distance between the first support roll and the second support roll is set by pressing from the center part of the roll axis direction of the first support roll and the second support roll, the unsolidified molten steel containing part of the slab. The roll of the first support roll that is above the minimum pressing force capable of suppressing bulging deformation of the unsolidified molten steel-containing portion of the slab when supported (pressed) from both sides in the slab thickness direction. The axial direction both ends and the end rolls only need to be within the range of the maximum pressing force that does not cause crushing of the solidified shell crimping portion of the slab.
Furthermore, according to the slab support device of the sixteenth aspect of the invention, the support roll is pressed against the slab by the pressing means, so that even if the support roll has misalignment, the influence can be reduced.
In addition, since the allowable setting range of the pressing force is wide and it is not necessary to set the pressing force with high accuracy, a simple device such as a spring or a constant pressure cylinder can be used as the pressing means, and a conventional bulging force can be obtained. There is no need for complicated operations such as accurately estimating and setting the interval between the first support roll and the second support roll, and a highly accurate positioning device.
Further, it is possible to reduce the waste of applying an excessive pressing force to the slab due to an estimation error of the pressing force.
Further, since the interval between the first support roll and the second support roll is set by mechanical positioning, a positioning sensor and a control device are unnecessary.
Moreover, since this slab support device has a very simple configuration, it is easy to manufacture and can reduce costs.
And furthermore, since the end roll which can be rotated separately from the second support roll is provided, even if the outer diameter (circumferential speed) of the second support roll and the end roll is different, the second support roll and the end roll It is possible to prevent slipping between the roll and the slab.

  According to the slab support device of the seventeenth invention, in the slab support device of any of the first to sixteenth inventions, the set pressing force of the pressing means suppresses bulging deformation of the unsolidified molten steel-containing portion. It is characterized in that it is set within a range not less than the necessary pressing force that can be performed and not more than the pressing force obtained by adding the end load capacity that is the load resistance of the solidified shell crimping portion to the necessary pressing force. Therefore, the pressing force of the pressing means is not less than the minimum pressing force capable of suppressing bulging deformation of the unsolidified molten steel-containing portion of the slab, and there is no possibility of crushing the solidified shell crimping portion of the slab. Within the maximum pressing force.

Furthermore, the following effects are also obtained in the first to fourth configurations.
That is, according to the slab support device of the first configuration, the slab support device of the first, second, fourth, fifth, seventh, eighth, tenth, eleventh, fourteenth or fifteenth inventions. In the above, since a plurality of the support rolls are provided and the pressing means is provided for each of these support rolls, the influence of misalignment of each support roll can be reduced more reliably.
According to the slab support device of the second configuration, in the slab support device of the third, sixth, ninth, twelfth, thirteenth or sixteenth invention, the first support roll and the second support roll Since a plurality of sets are provided and the pressing means is provided for each of these sets, the influence of misalignment of the support rolls of each set can be more reliably reduced.
According to the slab support device of the third configuration, in the slab support device of the first, second, fourth, fifth, seventh, eighth, tenth, eleventh, fourteenth or fifteenth invention, A plurality of the support rolls are provided, and the pressing means is provided so as to integrally press the plurality of support rolls as a whole. Therefore, a pressing means is provided for each support roll to set a pressing force. Therefore, the pressing force can be set for a plurality of support rolls, so that the manufacturing is easy.
According to the slab support device of the fourth configuration, in the slab support device of the third, sixth, ninth, twelfth, thirteenth or sixteenth invention, the first support roll and the second support roll Since there are a plurality of sets, and the pressing means is provided so as to integrally press the entire plurality of sets of support rolls, it is necessary to set a pressing force by providing a pressing means for each set. In addition, since the pressing force can be set for a plurality of sets of support rolls, the manufacturing is easy.

It is a front view of the twin drum type continuous casting equipment provided with the slab support apparatus which concerns on Embodiment 1 of this invention. It is a block diagram which shows planarly the casting_mold | template part (drum part) of the said twin drum type continuous casting installation. (A) is explanatory drawing which shows the mode of the slab when the solidified shell thickness is thin, (b) is explanatory drawing which shows the mode of the slab when the solidified shell thickness is thick. It is a cross-sectional view which shows the structure of the slab support apparatus arrange | positioned facing the fixed drum which concerns on Example 1 of Embodiment of this invention. It is a front view which shows the structure of the slab support apparatus arrange | positioned facing the fixed drum which concerns on Example 1 of Embodiment of this invention. (A) is a side view showing the configuration of a slab support device in which the slab according to Embodiment 1 of the present invention is located away from the fixed drum (a view in the direction of arrow A in (b)), (b) ) Is a front view of the slab support device, and FIG. 8C is a bottom view (a view in the direction of arrow B in FIG. 5B) showing a fixed support of the slab support device. It is a side view which shows the structure of the slab support apparatus arrange | positioned in the position away from the fixed drum which concerns on Example 1 of Embodiment of this invention. It is a front view which shows the structure of the slab support apparatus arrange | positioned in the position away from the fixed drum which concerns on Example 1 of Embodiment of this invention. It is a flowchart which shows the selection method of the setting pressing force of a press means (spring). It is a front view of the twin drum type continuous casting equipment provided with the slab support apparatus which concerns on Embodiment 2 of this invention. It is a block diagram which shows planarly the casting_mold | template part (drum part) of the said twin drum type continuous casting installation. It is a cross-sectional view which shows the structure of the slab support apparatus arrange | positioned facing the fixed drum which concerns on Example 2 of Embodiment of this invention. It is a front view which shows the structure of the slab support apparatus arrange | positioned facing the fixed drum which concerns on Example 2 of embodiment of this invention. (A) is a side view (D direction arrow view of (b)) which shows the structure of the slab support apparatus arrange | positioned in the position which the slab which concerns on Embodiment 2 of this invention leaves | separates from a fixed drum, (b) ) Is a front view of the slab support device, and (c) is a bottom view (a view in the direction of arrow E in (b)) showing a fixed support of the slab support device. It is a side view which shows the structure of the slab support apparatus arrange | positioned in the position away from the fixed drum which concerns on Example 2 of Embodiment of this invention. It is a front view which shows the structure of the slab support apparatus arrange | positioned in the position away from the fixed drum which concerns on Example 2 of Embodiment of this invention. It is a cross-sectional view which shows the structure of the slab support apparatus arrange | positioned facing the fixed drum which concerns on Example 3 of Embodiment of this invention. It is a front view which shows the structure of the slab support apparatus arrange | positioned facing the fixed drum which concerns on Example 3 of Embodiment of this invention. It is a side view which shows the structure of the slab support apparatus arrange | positioned in the position away from the fixed drum which concerns on the example 3 of this Embodiment. It is a front view which shows the structure of the slab support apparatus arrange | positioned in the position away from the fixed drum which concerns on the example 3 of this Embodiment. It is a cross-sectional view which shows the structure of the slab support apparatus arrange | positioned facing the fixed drum which concerns on Example 4 of Embodiment of this invention. It is a front view which shows the structure of the slab support apparatus arrange | positioned facing the fixed drum which concerns on Example 4 of Embodiment of this invention. (A) is a side view (G direction arrow view of (b)) which shows the structure of the slab support apparatus arrange | positioned in the position which the slab which concerns on Embodiment 4 of this invention leaves | separates from a fixed drum, (b) ) Is a front view of the slab support device, and FIG. 8C is a bottom view (a view in the direction of arrow H in FIG. 5B) showing a fixed support of the slab support device. It is a side view which shows the structure of the slab support apparatus arrange | positioned in the position away from the fixed drum which concerns on Example 4 of Embodiment of this invention. It is a front view which shows the structure of the slab support apparatus arrange | positioned in the position away from the fixed drum which concerns on Example 4 of Embodiment of this invention.

  Embodiments of the present invention will be described below in detail with reference to the drawings.

<Embodiment 1>
FIG. 1 is a front view of a twin drum type continuous casting facility equipped with a slab support device according to Embodiment 1 of the present invention, and FIG. 2 is a plan view of a mold part (drum portion) of the twin drum type continuous casting facility. FIG. 3 (a) is an explanatory view showing a state of a slab when the solidified shell thickness is thin, and FIG. 3 (b) is an explanatory view showing a state of the slab when the solidified shell thickness is thick. . 4 and 5 are a cross-sectional view and a front view showing the configuration of the slab support device arranged to face the fixed drum according to Embodiment 1 of the present invention. FIG. 6A is a side view showing the configuration of the slab support device in which the slab according to Embodiment 1 of the present invention is disposed at a position away from the fixed drum (direction A arrow in FIG. 6B). FIG. 6 (b) is a front view of the slab support device, and FIG. 6 (c) is a bottom view showing the fixed support of the slab support device (B direction arrow in FIG. 6 (b)). FIG. 7 and FIG. 8 are a side view and a front view showing a configuration of a slab support device arranged at a position away from the fixed drum according to Embodiment 1 of the present invention. FIG. 9 is a flowchart showing a method for selecting the set pressing force of the pressing means (spring).

  As shown in FIGS. 1 to 3, in the twin-drum continuous casting facility of the first embodiment, the fixed drum 1 as the first drum and the moving drum 2 as the second drum are close to each other in parallel. Both ends of the drums 1 and 2 in the drum axial direction (vertical direction in FIG. 2) are partitioned by side weirs 3 that are in contact with both end surfaces of the drums 1 and 2 in the drum axial direction. Then, molten steel 8 is supplied from the tundish 6 through the nozzle 7 to the internal space (hot water pool portion) 5 of the moving mold composed of the drums 1 and 2 and the side weir 3.

  The fixed drum 1 is cylindrical (or columnar), and has step portions 1a and 1b over the entire circumference of the drum at both ends of the outer peripheral surface in the drum axial direction. The outer diameters of these step portions 1a and 1b are larger than the outer diameter of the drum axial direction central portion 1c (the portion between the step portions 1a and 1b on both sides). Similarly, the movable drum 2 is cylindrical (or columnar), and has step portions 2a and 2b that extend over the entire circumference of the drum at both ends of the outer peripheral surface in the drum axial direction. The outer diameters of these step portions 2a and 2b are larger than the outer diameter of the drum axial direction central portion 2c (the portion between the step portions 2a and 2b on both sides). Further, the movable drum 2 is horizontally moved in a direction perpendicular to the drum axis direction, and the horizontal interval between the movable drum 2 and the fixed drum 1 can be adjusted.

  When the fixed drum 1 and the moving drum 2 rotate in directions opposite to each other (see the arrow in FIG. 1), the molten steel 8 supplied to the hot water reservoir 5 is transferred to the surfaces of the fixed drum 1 and the moving drum 2 (the drum axial direction central portion 1c, The solidified shell 11 as the first solidified shell and the solidified shell 12 as the second solidified shell. become. The solidified shells 11 and 12 grow as the drums 1 and 2 rotate, and the solidified shells 11 and 12 are formed at a minimum gap portion (kissing point) 13 where the distance between the drums 1 and 2 is the smallest. The ends are pressed against the stepped portions 1a and 1b of the fixed drum 1 and the stepped portions 2a and 2b of the movable drum 2 to be pressure-bonded to form the solidified shell pressure-bonded portions 14a and 14b. In addition, at this time, unsolidified molten steel 8 exists between the solidified shell 11 and the solidified shell 12 (unsolidified molten steel containing portion 14c).

  In this way, the bag-binding slab 14 including the unsolidified molten steel 8 in the solidified shells 11 and 12 is cast. That is, the slab 14 has solidified shell crimping portions 14a and 14b formed by crimping the ends of both the solidified shells 11 and 12 at both ends in the slab width direction (vertical direction in FIG. 2), and The unsolidified molten steel containing portion 14c including the unsolidified molten steel 8 between both the solidified shells 11 and 12 has a structure having a slab width direction central portion (a portion between the solidified shell crimping portions 14a and 14b on both sides). Yes.

  As shown in FIG. 3 (a), when the casting speed (drum rotation speed) is high, the solidified shells 11 and 12 are thinned. Therefore, the thickness L1 of the solidified shell crimping parts 14a and 14b and the unsolidified molten steel containing part While the thickness L2 of 14c is also reduced, the solidified shells 11 and 12 are thick when the casting speed (drum rotational speed) is slow as shown in FIG. The thickness L1 and the thickness L2 of the unsolidified molten steel containing portion 14c also increase. However, the difference between the thickness L1 of the solidified shell crimping portions 14a and 14b and the thickness L2 of the unsolidified molten steel containing portion 14c, that is, the distance from the surface of the solidified shell crimping portions 14a and 14b to the surface of the unsolidified molten steel containing portion 14c. L3 and L4 are the heights of the stepped portions 1a and 1b from the outer peripheral surface of the drum axial center 1c of the fixed drum 1, respectively (the difference between the outer diameter of the steps 1a and 1b and the outer diameter of the drum axial central 1c. ) And the height of the stepped portions 2a, 2b from the outer peripheral surface of the central portion 2c in the drum axial direction of the moving drum 2 (the difference between the outer diameter of the stepped portions 2a, 2b and the outer diameter of the central portion 2c in the drum axial direction). Therefore, even if the casting speed (drum rotation speed) changes, it is constant.

  The slab 14 coming out of the minimum gap portion 13 is wound around the lower portion of the outer peripheral surface of the fixed drum 1 by a predetermined contact arc length L, and then pulled away from the fixed drum 1.

  At this time, in order to support the slab 14 and suppress bulging deformation of the slab 14, the present twin-drum type continuous casting equipment includes a plurality of slabs divided into No. 1 segment to No. 6 segment. Supporting devices 21 to 26 are arranged along the direction in which the slab 14 is pulled out. The No. 1 segment slab support device 21 and the No. 2 segment slab support device 22 have the same structure, and the No. 4 segment slab support device 24 and the No. 5 segment slab support device. The slab support device 26 of No. 25 and No. 6 segment has the same configuration. The No. 3 segment slab support device 23 is different from the configuration of the slab support devices 21 and 24. Therefore, in the following, the configuration of the slab support device 21, the configuration of the slab support device 23, the configuration of the slab support device 24 will be described in detail, and the details of the configuration of the other slab support devices 22, 25, 26 will be described. Detailed explanation is omitted.

  As shown in FIGS. 4 and 5, the slab support device 21 is disposed in a plurality (in the illustrated example, facing the fixed drum 1 and disposed so as to be opposed to and parallel to the fixed drum 1). 5) support rolls 31 are provided. These support rolls 31 are parallel to each other, and are arranged in a line along the outer peripheral surface (arc) of the fixed drum 1.

  Each support roll 31 has a cylindrical shape (or a columnar shape), and has step portions 31a and 31b over the entire circumference of the roll at both ends in the roll axial direction (left and right direction in FIG. 4) of the outer peripheral surface. The outer diameters of these step portions 31a and 31b are larger than the outer diameter of the central portion 31c in the roll axis direction (the portion between the step portions 31a and 31b on both sides). Further, the height of the step portions 31a and 31b from the outer peripheral surface of the roll axial center portion 31c in the support roll 31 (the difference between the outer diameters of the step portions 31a and 31b and the outer diameter of the roll axial center portion 31c) is moved. The height of the step portions 2a and 2b from the outer peripheral surface of the drum axial direction central portion 2c in the drum 2 (the difference between the outer diameter of the step portions 2a and 2b and the outer diameter of the drum axial direction central portion 2c) is the same. .

  Each support roll 31 is rotatably supported by a bearing 32. The bearing 32 is connected to a plate-like frame 34 via a spring 33 as a pressing means provided for each support roll 31. The frame 34 is fixed to a fixing portion (not shown). The spring 33 pushes the support roll 31 toward the fixed drum 1 side.

  Therefore, the step portions 31a and 31b of the support roll 31 and the step portions 1a and 1b of the fixed drum 1 are brought into contact with the slab 14 by the pressing force of the spring 33 (the setting of the pressing force will be described later: see FIG. 8). By pressing the solidified shell crimping portions 14a and 14b from both sides in the slab thickness direction (vertical direction in FIG. 4), the interval between the support roll 31 and the fixed drum 1 is set, and the roll axis direction of the support roll 31 is set. The central portion 31c and the central portion 1c in the drum axial direction of the fixed drum 1 support (press) the unsolidified molten steel-containing portion 14c of the slab 14 from both sides in the slab thickness direction. Thus, bulging deformation of the slab 14 (unsolidified molten steel containing portion 14 c) is suppressed by the support roll 31 and the fixed drum 1.

  As shown in FIGS. 6 (a), 6 (b) and 6 (c), the slab support device 23 includes a fixed support 35 and a plurality of (three in the illustrated example) arranged to face the fixed support 35. The support roll 36 is provided, and the slab 14 is disposed at a position away from the fixed drum 1.

  The fixed support 35 has a triangular side surface, that is, the thickness of the side surface becomes thinner toward the upstream side in the drawing direction of the slab 14 (the direction of arrow C in FIG. 6B). These are disposed in a triangular gap 37 between the upper surface of the slab 14 immediately after being separated from the lower surface of the fixed drum 1. Then, step portions 35b and 35c are formed at both ends of the slab support surface (lower surface) 35a of the fixed support 35 in the width direction (left-right direction in FIG. 6A). These step portions 35b and 35c protrude below the center portion 35d in the width direction of the slab support surface 35a (the portion between the step portions 35b and 35c on both sides). The heights of the step portions 35b and 35c from the surface of the width direction central portion 35d are the heights of the step portions 1a and 1b (step portions 1a and 1b from the outer peripheral surface of the drum axial center portion 1c of the fixed drum 1). And the difference in the outer diameter of the central portion 1c in the drum axial direction).

  The plurality of support rolls 36 are positioned below the slab 14, and are arranged in a straight line in a row along the direction in which the slab 14 is pulled out in parallel with each other. Each support roll 36 has a cylindrical shape (or a columnar shape), and has step portions 36a and 36b extending over the entire circumference of the roll at both ends of the outer peripheral surface in the roll axis direction (left and right direction in FIG. 6A). ing. The outer diameters of these step portions 36a and 36b are larger than the outer diameter of the central portion 36c in the roll axis direction (the portion between the step portions 36a and 36b on both sides). Further, the height of the step portions 36a and 36b from the outer peripheral surface of the roll axial center portion 36c in the support roll 36 (the difference between the outer diameter of the step portions 36a and 36b and the outer diameter of the roll axial center portion 36c) is moved. The height of the step portions 2a and 2b from the outer peripheral surface of the drum axial direction central portion 2c in the drum 2 (the difference between the outer diameter of the step portions 2a and 2b and the outer diameter of the drum axial direction central portion 2c) is the same. .

  Each support roll 36 is rotatably supported by a bearing 38. The bearing 38 is connected to the plate-like frame 40 via a spring 39 as a pressing means provided for each support roll 36. The spring 39 pushes the support roll 36 toward the fixed support 35 side. The fixed support 35 and the frame 40 are fixed to a fixing portion (not shown).

  Therefore, the step portions 35b and 35c of the fixed support 35 and the step portions 36a and 36b of the support roll 36 are brought into contact with the slab 14 by the pressing force of the spring 39 (the setting of the pressing force will be described later: see FIG. 8). By pressing the solidified shell crimping portions 14a and 14b from both sides in the slab thickness direction (vertical direction in FIG. 6A), the interval between the fixed support 35 and the support roll 36 is set, and the fixed support 35 The center part 35d in the width direction of the slab support surface 35a and the center part 36c in the roll axial direction of the support roll 36 support (press) the unsolidified molten steel-containing part 14c of the slab 14 from both sides in the slab thickness direction. . Thus, bulging deformation of the slab 14 (unsolidified molten steel containing portion 14c) is suppressed by the fixed support 35 and the support roll 36.

  As shown in FIGS. 7 and 8, the slab support device 24 includes a plurality of (5 in the illustrated example) support rolls 42 as the first support roll and a plurality (5 in the illustrated example) of the second support rolls. The support roll 41 is provided. The plurality of support rolls 41 are located on the lower side of the slab 14, and are arranged in a straight line in a row along the direction in which the slab 14 is pulled out parallel to each other. The plurality of support rolls 42 are positioned on the upper side of the slab 14, and are arranged in a straight line in a row along the direction in which the slab 14 is pulled out in parallel with each other. Further, the support rolls 41 and the support rolls 42 are opposed to each other (arranged so as to face each other in parallel). In other words, the slab support device 24 includes a plurality of sets (five sets in the illustrated example) of support rolls 41 and support rolls 42 arranged to face each other.

  Each support roll 41 has a cylindrical shape (or a columnar shape), and has step portions 41a and 41b over the entire circumference of the roll at both ends in the roll axial direction (left and right direction in FIG. 6) of the outer peripheral surface. The outer diameters of these step portions 41a and 41b are larger than the outer diameter of the central portion 41c in the roll axis direction (the portion between the step portions 41a and 41b on both sides). Further, the height of the step portions 41a and 41b from the outer peripheral surface of the roll axial direction central portion 41c in the support roll 41 (the difference between the outer diameter of the step portions 41a and 41b and the outer diameter of the roll axial direction central portion 41c) is moved. The height of the step portions 2a and 2b from the outer peripheral surface of the drum axial direction central portion 2c in the drum 2 (the difference between the outer diameter of the step portions 2a and 2b and the outer diameter of the drum axial direction central portion 2c) is the same. .

  Each support roll 42 is cylindrical (or columnar), and has step portions 42a and 42b extending over the entire circumference of the roll at both ends in the roll axis direction (left and right direction in FIG. 6) of the outer peripheral surface. The outer diameters of these step portions 42a and 42b are larger than the outer diameter of the central portion 42c in the roll axis direction (the portion between the step portions 42a and 42b on both sides). Further, the height of the stepped portions 42a and 42b from the outer peripheral surface of the central portion 42c in the roll axial direction of the support roll 42 (the difference between the outer diameter of the stepped portions 42a and 42b and the outer diameter of the central portion 42c in the roll axial direction) is fixed. The height of the step portions 1a, 1b from the outer peripheral surface of the drum axial direction central portion 1c in the drum 1 (the difference between the outer diameter of the step portions 1a, 1b and the outer diameter of the drum axial direction central portion 1c) is the same. .

  Each support roll 41 is rotatably supported by a bearing 43. The bearing 43 is connected to a plate-like horizontal frame 45 via a spring 44 as a pressing means provided for each support roll 41. The spring 44 pushes the support roll 41 toward the support roll 42. Each support roll 42 is rotatably supported by a bearing 46. The bearing 46 is connected to a plate-like horizontal frame 47. The lower horizontal frame 45 and the upper horizontal frame 47 are coupled to each other via bar-shaped vertical frames 48 disposed at these four corners. The horizontal frames 45 and 47 are fixed to a fixing portion (not shown).

  For this reason, the step portions 41a and 41b of the support roll 41 and the step portions 42a and 42b of the support roll 42 are formed by the pressing force of the spring 44 (the setting of the pressing force will be described later: see FIG. 8). By pressing the solidified shell crimping portions 14a and 14b from both sides in the slab thickness direction (vertical direction in FIG. 6), the interval between the support roll 41 and the support roll 42 is set, and the roll axis direction of the support roll 41 is set. The central part 41c and the central part 42c in the roll axial direction of the support roll 42 support (press) the unsolidified molten steel-containing part 14c of the slab 14 from both sides in the slab thickness direction. Thus, the bulging deformation of the slab 14 (unsolidified molten steel containing portion 14c) is suppressed by the support roll 41 and the support roll 42.

  That is, compared with the unsolidified molten steel containing portion 14c, the solidified shell crimping portions 14a and 14b in a completely solidified state not containing the unsolidified molten steel have a very large load resistance (they are crushed even if pressed with a relatively large pressing force). And the distances L3 and L4 from the surfaces of the solidified shell crimping portions 14a and 14b to the surface of the unsolidified molten steel containing portion 14c are constant even when the drum rotational speed is changed. In the slab support devices 21, 23, and 24, with reference to the solidified shell crimping portions 14a and 14b of the slab 14, the distance between the support roll 31 and the fixed drum 1 and the distance between the fixed support 35 and the support roll 36 are used. The interval and the interval between the support roll 41 and the support roll 42 are determined.

Here, a method for selecting the pressing force of the springs 33, 39, and 44 will be described with reference to FIG. As shown in FIG. 9, in step S1, a necessary pressing force is estimated. The necessary pressing force is a minimum pressing force capable of suppressing bulging deformation (countering bulging force) in the unsolidified molten steel-containing portion 14c. In order to estimate the required pressing force, first, the molten steel static pressure is calculated by multiplying the molten steel density and the molten steel head by the following equation (1). Next, the required pressing force is calculated by multiplying the calculated molten steel static pressure and the bearing area by the following equation (2). The bearing area is the area of the slab 14 that the support roll holds in order to suppress bulging deformation.
When a spring is provided for each support roll as in the first embodiment, for example, the slab 14 is placed at a distance from the intermediate position of the adjacent support roll to the intermediate position of the next adjacent support roll. The area obtained by multiplying the width of the slab by subtracting the width of the solidified shell crimping portions 14a, 14b from the width (that is, the width of the unsolidified molten steel-containing portion 14c) is defined as the handling area.
Further, when a spring is provided for each segment (slab support device) as in Embodiment 3 described later, for example, from the intermediate position of the adjacent segment (slab support device), the next adjacent Multiply the distance to the middle position of the segment (slab support device) by the slab width obtained by subtracting the width of the solidified shell crimping portions 14a and 14b from the width of the slab 14 (that is, the width of the unsolidified molten steel containing portion 14c). It is assumed that it is responsible for the area.
(Molten steel static pressure) = (molten steel density) × (molten steel head) (1)
(Necessary pressing force) = (Static pressure of molten steel) x (Carrying area) (2)

In step S2, the end load capacity is estimated. The end portion load resistance is the load resistance of the solidified shell crimping portions 14a and 14b (maximum pressing force that does not cause crushing of the solidified shell crimping portions. The end load capacity is calculated by multiplying the roll end contact area, which is the contact surface area with the piece 14, the material yield strength of the solidified shell crimping portions 14a and 14b, and the number of supported rolls. The number of support rolls handled by the spring. When a spring is provided for each support roll as in the first embodiment, the number of bearing rolls is one, and each segment (casting) as in the third embodiment described later. When each single support device is provided with a spring, the number of support rolls in each segment (for example, five: see FIGS. 18 and 20).
(End Load Capacity) = (Roll End Contact Area) × (Material Strength) × (Number of Handle Rolls) (3)

In step S3, the set pressing force of the springs 33 and 44 (the pressing force by which the spring presses the solidified shell crimping portion) is based on the necessary pressing force calculated in step S1 and the end load resistance calculated in step S2. As shown in the following formula (4), the pressure is set within the range of the pressing force that is more than the required pressing force and the pressing force that is the required pressing force plus the end load resistance. That is, the set pressing force of the spring is equal to or higher than the minimum pressing force capable of suppressing bulging deformation of the slab 14 (unsolidified molten steel containing portion 14c), and crushes the solidified shell crimping portions 14a and 14b. It may be within the range below the maximum pressing force without fear.
(Required pressing force) ≤ (Set pressing force) ≤ (Required pressing force) + (End load capacity) (4)

  As described above, according to the slab support device 21 (22) of the first embodiment, the fixed drum 1 having the step portions 1a and 1b at both end portions in the drum axial direction and the step portions at both end portions in the drum axial direction. 2a and 2b, and the end portions of the solidified shell 11 solidified on the outer peripheral surface of the fixed drum 1 and the solidified shell 12 solidified on the outer peripheral surface of the movable drum 2 are the stepped portions of the fixed drum 1. 1a, 1b and the stepped portions 2a, 2b of the moving drum 2 have solidified shell crimping portions 14a, 14b at both ends in the slab width direction, and are not solidified between the solidified shell 11 and the solidified shell 12. This is a slab support device for a twin-drum type continuous casting facility for casting a slab 14 having a structure having an unsolidified molten steel containing portion 14c including a molten steel 8 at the center part in the slab width direction, and is disposed to face the fixed drum 1. And the step 3 at both ends in the roll axis direction a plurality of support rolls 31 having a and 31b, and a spring 33. By the pressing force of the spring 33, the step portions 31a and 31b of the support roll 31 and the step portions 1a and 1b of the fixed drum 1 are By pressing the solidified shell crimping portions 14a and 14b of the slab 14 from both sides in the thickness direction of the slab, the interval between the support roll 31 and the fixed drum 1 is set, and the center portion in the roll axial direction of the support roll 31 is set. Since 31c and the drum axial direction center part 1c of the fixed drum 1 are characterized by supporting the unsolidified molten steel-containing part 14c of the slab 14 from both sides in the slab thickness direction, the following operation is performed. An effect is obtained.

(1) That is, even when the thickness of the slab 14 changes during the casting of the bag-bound slab 14 in the twin-drum type continuous casting equipment, it is fixed to the support roll 31 according to the change (following easily). The interval between the drums 1 is accurately set with reference to the solidified shell crimping portions 14a and 14b of the slab 14.
Accordingly, since the distance between the central portion 31c in the roll axial direction of the support roll 31 and the central portion 1c in the drum axial direction of the fixed drum 1 is also set with high precision, the central portion 31c in the roll axial direction of the support roll 31 and the fixed drum 1, the central portion 1c in the drum axial direction supports (presses) the unsolidified molten steel-containing portion 14c of the slab 14 from both sides in the thickness direction of the slab, thereby bulging deformation of the unsolidified molten steel-containing portion 14c of the slab 14 Can be reliably suppressed.
In this case, the pressing force of the spring 33 is such that the step portions 31 a and 31 b of the support roll 31 and the step portions 1 a and 1 b of the fixed drum 1 are pressed by the pressing force of the spring 33, and the solidified shell crimping portions 14 a and 14 b of the slab 14. The distance between the support roll 31 and the fixed drum 1 is set by pressing 14b from both sides in the slab thickness direction, and the roll axial center part 31a of the support roll 31 and the drum axial center of the fixed drum 1 are set. When the portion 1c supports (presses) the unsolidified molten steel-containing portion 14c of the slab 14 from both sides in the slab thickness direction, bulging deformation of the unsolidified molten steel-containing portion 14c of the slab 14 can be suppressed. The stepped portions 31a and 31b of the support roll 31 and the stepped portions 1a and 1b of the fixed drum 1 are equal to or higher than the minimum pressing force, and the solidified shell crimping portions 14a and 14b of the slab 14 are formed. It may be within the scope of the following maximum pressing force unlikely to cause crushing.
(2) Since the support roll 31 is pressed against the slab by the spring 33, even if the support roll 31 is misaligned, the influence can be reduced.
(3) Further, since the allowable setting range of the pressing force is wide and it is not necessary to set the pressing force with high accuracy, a simple device such as the spring 33 can be used as the pressing means, and a conventional bulging force can be obtained. A complicated operation of accurately estimating and setting the interval between the support roll 31 and the fixed drum 1 and an accurate positioning device are unnecessary.
(4) Further, it is possible to reduce the waste of applying an excessive pressing force to the slab 14 due to an estimation error of the pressing force.
(5) Further, since the distance between the support roll 31 and the fixed drum 1 is set by mechanical positioning, positioning sensors and control devices are unnecessary.
(6) Moreover, since this slab support device 21 (22) has a very simple configuration, it can be easily manufactured and the cost can be reduced.
(7) Since the slab 14 is supported between the support roll 31 and the fixed drum 1 and is pressed against the fixed drum 1 by the pressing force of the spring 33, the cooling effect of the slab 14 by the fixed drum 1 is also expected. it can.

  Further, according to the slab support device 21 (22) of the first embodiment, since it is characterized in that a spring 33 is provided for each support roll 31, the influence of misalignment of each support roll 31 is It can reduce more reliably.

  Further, according to the slab support device 23 of the first embodiment, the fixed drum 1 having the step portions 1a and 1b at both ends in the drum axial direction and the movement having the step portions 2a and 2b at both ends in the drum axial direction. And the end portions of the solidified shell 11 solidified on the outer peripheral surface of the fixed drum 1 and the solidified shell 12 solidified on the outer peripheral surface of the movable drum 2 are the steps 1a and 1b of the fixed drum 1 and the movable drum. The solidified shell crimping portions 14a and 14b are crimped by the two step portions 2a and 2b at both ends in the slab width direction, and the unsolidified molten steel 8 including the unsolidified molten steel 8 is included between the solidified shell 11 and the solidified shell 12. A slab support device for a twin drum type continuous casting facility for casting a slab 14 having a structure having a solidified molten steel-containing part 14c in the center part in the slab width direction, and stepped portions at both ends in the width direction of the slab support surface 35a. Fixed support 35 having 35b and 35c The fixed support 35 is provided with at least a plurality of support rolls 36 that are arranged to face the fixed support 35 and have step portions 36a and 36b at both ends in the roll axial direction, and a spring 39. The step portions 35b and 35c and the step portions 36a and 36b of the support roll 36 press the solidified shell crimping portions 14a and 14b of the slab 14 from both sides in the slab thickness direction, thereby fixing the support 35 and the support roll 36. The width direction center part 35d of the slab support surface 35a of the fixed support 35 and the roll axis direction center part 36c of the support roll 36 cast the unsolidified molten steel containing part 14c of the slab 14 into a slab. Since it is characterized in that the structure is supported from both sides in the thickness direction, the following operational effects can be obtained.

(1) That is, even if the thickness of the slab 14 changes during the casting of the bag-bound slab 14 in the twin drum type continuous casting equipment, the fixed support 35 and the support are matched to the change (following easily). The interval between the rolls 36 is accurately set with reference to the solidified shell crimping portions 14a and 14b of the slab 14.
Accordingly, since the distance between the center portion 35d in the width direction of the slab support surface 35a of the fixed support 35 and the center portion 36c in the roll axis direction of the support roll 36 is also set with high precision, the slab support surface of the fixed support 35 is set. The center part 35d in the width direction of 35a and the center part 36c in the roll axis direction of the support roll 36 support (press) the unsolidified molten steel-containing part 14c of the slab 14 from both sides in the slab thickness direction, whereby the slab 14 The bulging deformation of the (unsolidified molten steel-containing portion 14c) can be reliably suppressed.
In this case, the pressing force of the spring 39 is such that the step portions 35b and 35c of the fixed support 35 and the step portions 36a and 36b of the support roll 36 are caused by the pressing force of the spring 39 so that the solidified shell crimping portion 14a and The distance between the fixed support 35 and the support roll 36 is set by pressing 14a from both sides in the slab thickness direction, so that the center part 35d in the width direction of the slab support surface 35a of the fixed support 35 and the support roll 36 are set. When the unsolidified molten steel containing portion 14c of the slab 14 is supported (pressed) from both sides in the slab thickness direction, the roll axial direction central portion 36c of the slab 14 suppresses bulging deformation of the unsolidified molten steel containing portion 14c. The stepped portions 35b and 35c of the fixed support 35 and the stepped portions 36a and 36b of the support roll 36 are equal to or higher than the minimum pressing force possible. Shell crimping portion 14a, may be within the scope of the following maximum without risk of crushing the 14b pressing force.
(2) Further, since the support roll 36 is pressed against the cast piece 14 by the spring 39, even if the support roll 36 is misaligned, the influence can be reduced.
(3) Since the allowable setting range of the pressing force is wide and it is not necessary to set the pressing force with high accuracy, a simple device such as the spring 39 can be used as the pressing means, and a conventional bulging force can be obtained. A complicated operation of accurately estimating and setting the interval between the fixed support 35 and the support roll 36 and an accurate positioning device are unnecessary.
(4) Further, it is possible to reduce the waste of applying an excessive pressing force to the slab 14 due to an estimation error of the pressing force.
(5) In addition, since the distance between the fixed support 35 and the support roll 36 is set by mechanical positioning, positioning sensors and control devices are unnecessary.
(6) Further, since the slab support device 23 has a very simple configuration, it can be easily manufactured and the cost can be reduced.

  In addition, according to the slab support device 23 of the first embodiment, since each support roll 36 is provided with a spring 39, the influence of misalignment of each support roll 36 can be more reliably prevented. Can be reduced.

  Further, according to the slab support device 24 (25, 26) of the first embodiment, the fixed drum 1 having the step portions 1a and 1b at both ends in the drum axial direction and the step portions 2a at both ends in the drum axial direction. , 2b, and the end portions of the solidified shell 11 solidified on the outer peripheral surface of the fixed drum 1 and the solidified shell 12 solidified on the outer peripheral surface of the movable drum 2 are stepped portions 1a of the fixed drum 1. , 1b and the stepped portions 2a and 2b of the moving drum 2 are provided with solidified shell crimping portions 14a and 14b at both ends in the slab width direction, and unsolidified between the solidified shell 11 and the solidified shell 12. A slab support device of a twin-drum continuous casting facility for casting a slab 14 having a structure having an unsolidified molten steel containing portion 14c including a molten steel 8 in the center part in the slab width direction, and a plurality of sets of both ends in the roll axial direction Support having stepped portions 42a and 42b The trawl 42 and the support roll 41 having step portions 41 a and 41 b at both ends in the roll axial direction are arranged to face each other, and a spring 44 is provided. By the pressing force of the spring 44, the step portions 42 a and 42 b of the support roll 42 are provided. 42b and the step portions 41a and 41b of the support roll 41 press the solidified shell crimping portions 14a and 14b of the slab 14 from both sides in the thickness direction of the slab, thereby increasing the distance between the support roll 42 and the support roll 41. The configuration is such that the roll axial center part 42c of the support roll 42 and the roll axial center part 41c of the support roll 41 support the unsolidified molten steel containing part 14c of the slab 14 from both sides in the slab thickness direction. Because of this feature, the following effects can be obtained.

(1) That is, even when the thickness of the slab 14 changes during the casting of the bag-bound slab 14 in the twin-drum type continuous casting equipment, the support roll 42 and the support are matched to the change (following easily). The interval between the rolls 41 is accurately set with reference to the solidified shell crimping portions 14a and 14b of the slab 14.
Accordingly, since the distance between the roll axial center part 42c of the support roll 42 and the roll axial center part 41c of the support roll 41 is also set with high precision, the roll axial center part 42c of the support roll 42 and the support roll 42 The central portion 41c in the roll axis direction 41 supports (presses) the unsolidified molten steel-containing portion 14c of the slab 14 from both sides in the slab thickness direction, whereby the bulging deformation of the unsolidified molten steel-containing portion 14c of the slab 14 is achieved. Can be reliably suppressed.
In this case, the pressing force of the spring 44 is such that the step portions 42 a and 42 b of the support roll 42 and the step portions 41 a and 41 b of the support roll 41 are pressed by the pressing force of the spring 44, and the solidified shell crimping portions 14 a and 14 b of the slab 14. The distance between the support roll 41 and the support roll 42 is set by pressing 14b from both sides in the slab thickness direction, so that the roll axial center part 42c of the support roll 42 and the roll axial center of the support roll 41 are set. When the portion 41c supports (presses) the unsolidified molten steel-containing portion 14c of the slab 14 from both sides in the slab thickness direction, bulging deformation of the unsolidified molten steel-containing portion 14c of the slab 14 can be suppressed. The stepped portions 42a and 42b of the support roll 42 and the stepped portions 41a and 41b of the support roll 41 are equal to or more than the minimum pressing force. It may be in a range of solidified shell crimped portion 14c to press crush no possibility of maximum following the pressing force.
(2) Since the support rolls 41 and 42 are pressed against the cast piece 14 by the spring 44, even if the support rolls 41 and 42 are misaligned, the influence can be reduced.
(3) Further, since the allowable setting range of the pressing force is wide and it is not necessary to set the pressing force with high accuracy, a simple device such as a spring 44 can be used as the pressing means, and a conventional bulging force can be obtained. A complicated operation of accurately estimating and setting the interval between the support roll 42 and the support roll 41 and an accurate positioning device are unnecessary.
(4) Further, it is possible to reduce the waste of applying an excessive pressing force to the slab 14 due to an estimation error of the pressing force.
(5) Moreover, since the space | interval between the support roll 42 and the support roll 41 is set by mechanical positioning, the sensor and control apparatus for positioning are unnecessary.
(6) Since the slab support device 24 (25, 26) has a very simple configuration, it is easy to manufacture and can reduce costs.

  Further, according to the slab support device 24 (25, 26) of the first embodiment, since the spring 44 is provided for each group, the misalignment of the support rolls 41, 42 of each group is provided. Can be reduced more reliably.

  Further, according to the slab support device 21 (22), 23, 24 (25, 26) of the first embodiment, the set pressing force of the springs 33, 39, 44 is bulging the unsolidified molten steel containing portion 14c. It is set within the range of not less than the required pressing force capable of suppressing deformation and not more than the pressing force obtained by adding the end load resistance, which is the load resistance of the solidified shell crimping portions 14a, 14b, to the required pressing force. Therefore, the pressing force of the springs 33, 39, 44 is equal to or higher than the minimum pressing force capable of suppressing bulging deformation of the unsolidified molten steel-containing portion 14c of the slab 14, and the slab 14 within the range of the maximum pressing force that does not cause crushing of the 14 solidified shell crimping portions 14a and 14b.

<Embodiment 2>
FIG. 10 is a front view of a twin drum type continuous casting facility equipped with a slab support device according to Embodiment 2 of the present invention, and FIG. 11 is a plan view of a mold part (drum portion) of the twin drum type continuous casting facility. It is a block diagram shown in FIG. 12 and 13 are a cross-sectional view and a front view showing the configuration of the slab support device disposed opposite to the fixed drum according to the second embodiment of the present invention. FIG. 14A is a side view showing the configuration of the slab support device in which the slab according to Embodiment 2 of the present invention is disposed at a position away from the fixed drum (D direction arrow in FIG. 14B). 14 (b) is a front view of the slab support device, and FIG. 14 (c) is a bottom view showing the fixed support of the slab support device (E direction arrow in FIG. 14 (b)). FIG. 15 and FIG. 16 are a side view and a front view showing a configuration of a slab support device arranged at a position away from the fixed drum according to Embodiment 2 of the present invention.

  As shown in FIGS. 10 and 11, in the twin-drum continuous casting facility of the second embodiment, the fixed drum 51 as the first drum and the moving drum 52 as the second drum are close to each other in parallel. Both ends of the drums 51 and 52 in the drum axial direction (vertical direction in FIG. 10) are partitioned by side weirs 53 that are in contact with both end surfaces of the drums 51 and 52 in the drum axial direction. Then, molten steel 58 is supplied from a tundish 56 through a nozzle 57 to an internal space (a hot water pool portion) 55 of the moving mold composed of the drums 51 and 2 and the side weir 53.

  The fixed drum 51 is cylindrical (or columnar), and has stepped portions 51a and 51b over the entire circumference of the drum at both ends of the outer peripheral surface in the drum axial direction. The outer diameters of these step portions 51a and 51b are larger than the outer diameter of the drum axial direction central portion 51c (the portion between the step portions 51a and 51b on both sides). On the other hand, the movable drum 2 has a cylindrical (or columnar) shape and is a flat drum (a drum having a constant outer diameter over the entire drum axis direction) having no stepped portion on the outer peripheral surface. Further, the movable drum 52 is horizontally moved in a direction orthogonal to the drum axis direction, and the horizontal distance from the fixed drum 51 can be adjusted.

  When the fixed drum 51 and the moving drum 52 rotate in directions opposite to each other (see the arrow in FIG. 10), the molten steel 58 supplied to the hot water reservoir 55 is transferred to the surface of the fixed drum 51 (the surface of the drum axial center 51c and the stepped portion). 1a and 1b) and the surface of the moving drum 52 are brought into contact with each other and cooled to solidify into a solidified shell 61 as a first solidified shell and a solidified shell 62 as a second solidified shell. These solidified shells 61 and 62 grow as the drums 51 and 52 rotate, and the minimum gap portion (kissing point) 63 in which the distance between the drums 51 and 52 becomes the smallest is shown in FIG. The ends are pressed and pressed against the stepped portions 51a and 51b of the fixed drum 5 and both end portions 52a and 52b in the drum axial direction of the moving drum 52, whereby the solidified shell crimping portions 64a and 64b are formed. In addition, at this time, unsolidified molten steel 58 exists between the solidified shell 61 and the solidified shell 62 (unsolidified molten steel containing portion 64c).

  In this way, the bag-binding slab 64 including the unsolidified molten steel 58 in the solidified shells 61 and 62 is cast. That is, the slab 64 has solidified shell crimping portions 64a and 64b formed by crimping the ends of both the solidified shells 61 and 62 at both ends in the slab width direction (vertical direction in FIG. 11), and The structure includes an unsolidified molten steel containing portion 64c including unsolidified molten steel 58 between the solidified shells 61 and 62 at the center portion in the slab width direction (a portion between the solidified shell crimping portions 64a and 64b on both sides). Yes.

  As in the first embodiment, the solidified shells 61 and 62 are thicker when the drum rotation speed is slower than when the drum rotation speed is faster, and the thickness L1 of the solidified shell crimping portions 64a and 64b and the unsolidified molten steel. Although the thickness L2 of the containing portion 64c also increases, the difference between the thickness L1 of the solidified shell crimped portions 64a and 64b and the thickness L2 of the unsolidified molten steel containing portion 64c, that is, the surface of the solidified shell crimped portions 64a and 64b is not increased. The distance L3 to the surface of the solidified molten steel containing portion 64c is the height of the step portions 51a and 51b from the outer peripheral surface of the drum axial direction central portion 51c of the fixed drum 51 (the outer diameter of the step portions 51a and 51b and the center in the drum axial direction). Therefore, even if the drum rotation speed changes, it is constant.

  The slab 64 that has come out of the minimum gap portion 63 is wound around the lower portion of the outer peripheral surface of the fixed drum 51 by a predetermined contact arc length L, and is then pulled away from the fixed drum 51.

  At this time, in order to support the slab 64 and suppress bulging deformation of the slab 64, the twin-drum type continuous casting equipment includes a plurality of slabs divided into No. 1 segment to No. 6 segment. Supporting devices 71 to 76 are arranged along the direction in which the slab 64 is pulled out. The No. 1 segment slab support device 61 and the No. 2 segment slab support device 72 have the same configuration, and the No. 4 segment slab support device 74 and the No. 5 segment slab support device. The slab support device 76 of 75 and No. 6 segment has the same configuration. Further, the No. 3 segment slab support device 73 is different from the configuration of the slab support devices 71 and 74. Accordingly, in the following, the configuration of the slab support device 71, the configuration of the slab support device 73, and the configuration of the slab support device 74 will be described in detail, and the details of the configurations of the other slab support devices 72, 75, and 76 will be described. Detailed explanation is omitted.

  As shown in FIGS. 12 and 13, the slab support device 71 has a plurality (five in the illustrated example) arranged opposite to the fixed drum 51 (disposed so as to face the fixed drum 51 and be parallel to the fixed drum 51). ) Support roll 81. These support rolls 81 are parallel to each other, and are arranged in a line along the outer peripheral surface (arc) of the fixed drum 51.

  Each support roll 81 is cylindrical (or columnar), and corresponding to the fact that the moving drum 52 is a flat drum, a flat roll that does not have a step portion on the outer peripheral surface (the roll axis direction (left and right in FIG. 12)). Direction) roll with a constant outer diameter). Each support roll 81 is rotatably supported by a bearing 82. The bearing 82 is connected to a plate-like frame 84 via a spring 83 as a pressing means provided for each support roll 81. The frame 84 is fixed to a fixing portion (not shown). The spring 83 pushes the support roll 81 toward the fixed drum 51 side.

  For this reason, the pressing force of the spring 83 (the setting of the pressing force is the same as that in the first embodiment) and the both ends 81a and 81b in the roll axial direction of the support roll 81 and the stepped portion 51a of the fixed drum 51 51b presses the solidified shell crimping portions 64a and 64b of the slab 64 from both sides in the slab thickness direction (vertical direction in FIG. 12), so that the distance between the support roll 81 and the fixed drum 51 is set. The roll axis direction central portion 81c of the support roll 81 (the portion between the end portions 81a and 81b on both sides) and the drum axis direction central portion 51c of the fixed drum 51 form the unsolidified molten steel-containing portion 64c of the slab 64. Support (press) from both sides in the slab thickness direction. Thus, bulging deformation of the slab 64 (unsolidified molten steel containing portion 64 c) is suppressed by the support roll 81 and the fixed drum 51.

  As shown in FIGS. 14A, 14B, and 14C, the slab support device 73 includes a fixed support 85 and a plurality of (three in the illustrated example) arranged to face the fixed support 85. The slab 64 is disposed at a position away from the fixed drum 51.

  The fixed support 85 has a triangular side surface, that is, the thickness of the side surface becomes thinner toward the upstream side in the drawing direction of the slab 64 (the direction of arrow F in FIG. 14B). The triangular gap 87 is disposed between the fixed drum 1 and the upper surface of the slab 64 immediately after being separated from the lower surface of the fixed drum 1. Then, stepped portions 85b and 85c are formed at both ends of the slab support surface (lower surface) 85a of the fixed support 85 in the width direction (left and right direction in FIG. 14A). These step portions 85b and 85c protrude below the center portion 85d in the width direction of the slab support surface 85a (the portion between the step portions 85b and 85c on both sides). The heights of the step portions 85b and 85c from the surface of the width direction central portion 85d are the heights of the step portions 51a and 51b (step portions 51a and 51b from the outer peripheral surface of the drum axial direction central portion 51c of the fixed drum 51. And the difference between the outer diameter of the central portion 51c in the drum axial direction).

  The plurality of support rolls 86 are located below the slab 64 and are arranged in a straight line in a row along the direction in which the slab 64 is pulled out in parallel with each other. Each support roll 86 is cylindrical (or columnar), and corresponding to the fact that the moving drum 52 is a flat drum, a flat roll (in the roll axial direction (FIG. 14 (a) ) In the left-right direction), the outer diameter of the roll is constant throughout. Each support roll 86 is rotatably supported by a bearing 88. The bearing 88 is connected to the plate-shaped frame 90 via a spring 89 as a pressing means provided for each support roll 86. The spring 89 pushes the support roll 86 toward the fixed support 85 side. The fixed support 85 and the frame 90 are fixed to a fixing portion (not shown).

  Therefore, the step portions 85b and 85c of the fixed support 85 and both end portions 86a of the support roll 86 in the roll axial direction are set by the pressing force of the spring 89 (the setting of the pressing force is the same as in the first embodiment). , 86b press the solidified shell crimping portions 64a, 64b of the slab 64 from both sides in the slab thickness direction (vertical direction in FIG. 14 (a)), thereby separating the fixed support 85 and the support roll 86 from each other. Is set, and the center portion 85d in the width direction of the slab support surface 85a of the fixed support 85 and the center portion 86c in the roll axis direction of the support roll 86 (the portion between the end portions 86a and 86b on both sides) are the slab 64. The unsolidified molten steel-containing portion 64c is supported (pressed) from both sides in the slab thickness direction. Thus, bulging deformation of the slab 64 (unsolidified molten steel containing portion 64 c) is suppressed by the fixed support 85 and the support roll 86.

  As shown in FIGS. 15 and 16, the slab support device 74 includes a plurality of (5 in the illustrated example) support rolls 92 as the first support roll and a plurality (5 in the illustrated example) of the second support rolls. The support roll 91 is provided. The plurality of support rolls 91 are located below the slab 64 and are arranged in a straight line in a row along the direction in which the slab 64 is drawn out in parallel to each other. The plurality of support rolls 92 are positioned on the upper side of the slab 64 and are arranged in a straight line in a row along the direction in which the slab 64 is drawn out in parallel with each other. Further, the support rolls 91 and the support rolls 92 are opposed to each other (arranged so as to face each other in parallel). That is, the slab support device 74 includes a plurality of sets (five sets in the illustrated example) of support rolls 91 and support rolls 92 arranged to face each other.

  Each support roll 91 is cylindrical (or columnar), and corresponding to the fact that the moving drum 52 is a flat drum, a flat roll (in the roll axis direction (left and right in FIG. Direction) roll with a constant outer diameter). On the other hand, each support roll 92 has a cylindrical shape (or a columnar shape), and has step portions 92a and 92b over the entire circumference of the roll at both ends of the outer peripheral surface in the roll axial direction (left and right direction in FIG. 13). The outer diameters of these step portions 92a and 92b are larger than the outer diameter of the central portion 92c in the roll axis direction (the portion between the step portions 92a and 92b on both sides). In addition, the height of the step portions 92a and 92b from the outer peripheral surface of the center portion 92c in the roll axis direction of the support roll 92 (the difference between the outer diameter of the step portions 92a and 92b and the outer diameter of the center portion 92c in the roll axis direction) is fixed. The height of the step portions 51a and 51b from the outer peripheral surface of the drum axial direction central portion 51c in the drum 51 (the difference between the outer diameter of the step portions 51a and 51b and the outer diameter of the drum axial direction central portion 51c) is the same. .

  Each support roll 91 is rotatably supported by a bearing 93. The bearing 93 is connected to a plate-like horizontal frame 95 via a spring 94 as a pressing means provided for each support roll 91. The spring 94 pushes the support roll 91 toward the support roll 92. Each support roll 92 is rotatably supported by a bearing 96. The bearing 96 is connected to a plate-like horizontal frame 97. The lower horizontal frame 95 and the upper horizontal frame 97 are coupled to each other via bar-shaped vertical frames 98 disposed at these four corners. Further, these frames 95, 97, and 98 are fixed to a fixing portion (not shown).

  For this reason, by the pressing force of the spring 94 (the setting of the pressing force is the same as that in the first embodiment), both end portions 91a, 91b in the roll axial direction of the support roll 91 and the step portion 92a of the support roll 92 are provided. , 92b presses the solidified shell crimping portions 64a, 64b of the slab 64 from both sides in the slab thickness direction (vertical direction in FIG. 15), thereby setting the distance between the support roll 91 and the support roll 92. Thus, the roll axial direction central portion 91c of the support roll 91 (the portion between the end portions 91a and 91b on both sides) and the roll axial direction central portion 92c of the support roll 92 constitute the unsolidified molten steel-containing portion 64c of the slab 64. Support (press) from both sides in the slab thickness direction. Thus, the bulging deformation of the slab 64 (unsolidified molten steel-containing portion 64c) is suppressed by the support roll 91 and the support roll 92.

  That is, compared with the unsolidified molten steel containing portion 64c, the solidified shell crimping portions 64a and 64b in a completely solidified state not containing the unsolidified molten steel have a very large load resistance and are crushed even when pressed with a relatively large pressing force. Note that the distance L3 from the surfaces of the solidified shell crimping portions 64a and 64b to the surface of the unsolidified molten steel containing portion 64c is constant even when the drum rotational speed is changed, as described above. In the support devices 71, 73, and 74, the distance between the support roll 81 and the fixed drum 51, the distance between the fixed support 85 and the support roll 86, and the support based on the solidified shell crimping portions 64 a and 64 b of the slab 64. An interval between the roll 91 and the support roll 92 is determined.

  As described above, according to the slab support device 71 (72) of the second embodiment, the fixed drum 51 having the step portions 51a and 51b at both ends in the drum axial direction, and the moving drum 52 that is a flat drum. The end portions of the solidified shell 61 solidified on the outer peripheral surface of the fixed drum 51 and the solidified shell 62 solidified on the outer peripheral surface of the movable drum 52 are the stepped portions 51 a and 51 b of the fixed drum 51 and the drum of the movable drum 52. The solidified shell crimping portions 64a and 64b crimped by the axial end portions 52a and 52b are provided at both ends of the slab width direction, and the solidified shell 61 and the solidified shell 62 contain unsolidified molten steel. A slab support device for a twin-drum type continuous casting facility for casting a slab 64 having a structure having a molten steel containing part 64c in the center part in the slab width direction. A plurality of support rolls 81 and springs 83 are provided. Due to the pressing force of the springs 83, both ends 81a and 81b in the roll axial direction of the support rolls 81 and the step portions 51a and 51b of the fixed drum 51 are provided. By pressing the solidified shell crimping part 64c of the slab 64 from both sides in the slab thickness direction, the distance between the support roll 81 and the fixed drum 51 is set, and the center part 81c in the roll axial direction of the support roll 81 is set. And the drum axial direction central portion 51c of the first drum 51 is characterized in that the unsolidified molten steel containing portion 64c of the slab 64 is supported from both sides in the slab thickness direction. An effect is obtained.

(1) That is, even when the thickness of the slab 64 changes during the casting of the bag-bound slab 64 in the twin-drum type continuous casting equipment, it is fixed to the support roll 81 according to the change (following easily). The interval between the drums 51 is accurately set with reference to the solidified shell crimping portions 64a and 64b of the slab 64.
Therefore, since the distance between the center portion 81c in the roll axis direction of the support roll 81 and the center portion 51c in the drum axis direction of the fixed drum 51 is also set with high accuracy, the central portion 81c in the roll axis direction of the support roll 81 and the fixed drum 51, the central portion 51c in the drum axial direction supports (presses) the unsolidified molten steel-containing portion 64c of the slab 64 from both sides in the thickness direction of the slab, thereby bulging deformation of the unsolidified molten steel-containing portion 64c of the slab 64. Can be reliably suppressed.
In this case, the pressing force of the spring 83 is such that the both ends 81a and 81b in the roll axial direction of the support roll 81 and the step portions 51a and 51b of the fixed drum 51 are pressed against the solidified shell of the slab 64 by the pressing force of the spring 83. By pressing the portions 64a and 64b from both sides in the slab thickness direction, the interval between the support roll 81 and the fixed drum 51 is set, and the central portion 81c of the support roll 81 in the roll axial direction and the drum of the fixed drum 51 are set. When the axially central portion 51c supports (presses) the unsolidified molten steel-containing portion 64c of the slab 64 from both sides in the slab thickness direction, the bulging deformation of the unsolidified molten steel-containing portion 64c of the slab 64 is suppressed. More than the minimum possible pressing force, and both end portions 81a, 81b of the support roll 81 in the roll axial direction and step portions 51a, 51 of the fixed drum 51 But it may be within the range solidified shell crimp portion 64a, the maximum no risk of crushing the 64b below the pressing force of the slab 64.
(2) Further, since the support roll 81 is pressed against the slab 64 by the spring 83, even if the support roll 81 is misaligned, the influence can be reduced.
(3) Since the allowable setting range of the pressing force is wide and it is not necessary to set the pressing force with high accuracy, a simple device such as a spring 83 can be used as the pressing means, and a conventional bulging force can be obtained. A complicated operation of accurately estimating and setting the interval between the support roll 81 and the fixed drum 51 and an accurate positioning device are unnecessary.
(4) Further, it is possible to reduce the waste of applying an excessive pressing force to the slab 64 due to an estimation error of the pressing force.
(5) Further, since the interval between the support roll 81 and the fixed drum 51 is set by mechanical positioning, a positioning sensor and a control device are unnecessary.
(6) Moreover, since this slab support device 71 (72) has a very simple configuration, it can be easily manufactured and cost can be reduced.
(7) Since the slab 64 is supported between the support roll 81 and the fixed drum 51 and is pressed against the fixed drum 51 by the pressing force of the spring 83, the cooling effect of the slab 64 by the fixed drum 51 is also obtained. I can expect.

  In addition, according to the slab support device 71 (72) of the second embodiment, since each support roll 81 is provided with a spring 83, the influence of misalignment of each support roll 81 is It can reduce more reliably.

  Further, according to the slab support device 73 of the second embodiment, the fixed drum 51 having the step portions 51a and 51b at both ends in the drum axial direction and the moving drum 52 that is a flat drum are provided and fixed. The ends of the solidified shell 61 solidified on the outer peripheral surface of the drum 51 and the solidified shell 62 solidified on the outer peripheral surface of the moving drum 52 are stepped portions 51a and 51b of the fixed drum 51 and both end portions 52a of the moving drum 52 in the drum axial direction. The solidified shell containing portion 64c including the solidified molten steel between the solidified shell 61 and the solidified shell 62 is cast between the solidified shell 61 and the solidified shell 62. A slab support device for a twin-drum type continuous casting facility for casting a slab 64 having a structure at the center in the width direction of the slab, having stepped portions 85b and 85c at both ends in the width direction of the slab support surface 85a. The fixed support 85 is provided with a plurality of support rolls 86 that are arranged to face the fixed support 85 and are flat rolls, and a spring 89. By the pressing force of the spring 89, the step portions 85b and 85c of the fixed support 85 are provided. The both ends 86a and 86b in the axial direction of the support roll 86 press the solidified shell crimping portions 64a and 64b of the slab 64 from both sides in the thickness direction of the slab. The width direction center part 85d of the slab support surface 85a of the fixed support 85 and the roll axis direction center part 86c of the support roll 86 set the distance between the unsolidified molten steel-containing part 64c of the slab 64 in the slab thickness direction. Since it is characterized in that it is configured to be supported from both sides, the following effects can be obtained.

(1) That is, even when the thickness of the slab 64 changes during the casting of the bag-bound slab 64 in the twin-drum type continuous casting equipment, the fixed support 85 and the support are matched to the change (following easily). The interval between the rolls 86 is accurately set with reference to the solidified shell crimping portions 64a and 64b of the slab 64.
Accordingly, since the distance between the center portion 85d in the width direction of the slab support surface 85a of the fixed support 85 and the center portion 86c in the roll axis direction of the support roll 86 is also set with high accuracy, the slab support surface of the fixed support 85 is set. The slab 64 is supported by pressing the unsolidified molten steel-containing part 64c of the slab 64 from both sides in the slab thickness direction by the center part 85d in the width direction of 85a and the center part 86c in the roll axial direction of the support roll 86. The bulging deformation of the unsolidified molten steel-containing portion 64c can be reliably suppressed.
In this case, the pressing force of the spring 89 is such that the stepped portions 85b and 85c of the fixed support 85 and both ends 86a and 86b in the roll axial direction of the support roll 86 are pressed against the solidified shell of the slab 64 by the pressing force of the spring 89. By pressing the portions 64a and 64b from both sides in the slab thickness direction, the interval between the fixed support 85 and the support roll 86 is set, and the width direction central portion 85d of the slab support surface 85a of the fixed support 85 When the center portion 86c in the roll axial direction of the support roll 86 supports (presses) the unsolidified molten steel containing portion 64c of the slab 64 from both sides in the slab thickness direction, the unsolidified molten steel containing portion 64c of the slab 64 is provided. Roll axial directions of the stepped portions 85b and 85c of the fixed support 85 and the support roll 86 are equal to or higher than the minimum pressing force capable of suppressing bulging deformation. Both end portions 86c may be within the range solidified shell crimp portion 64a, the maximum no risk of crushing the 64b pressing force of the following cast strip 64.
(2) Since the support roll 86 is pressed against the slab 64 by the spring 89, even if the support roll 86 is misaligned, the influence can be reduced.
(3) Since the allowable setting range of the pressing force is wide and it is not necessary to set the pressing force with high accuracy, a simple device such as a spring 89 can be used as the pressing means, and a conventional bulging force can be obtained. A complicated operation of accurately estimating and setting the interval between the fixed support 85 and the support roll 86 and an accurate positioning device are unnecessary.
(4) Further, it is possible to reduce the waste of applying an excessive pressing force to the slab 64 due to an estimation error of the pressing force.
(5) In addition, since the interval between the fixed support 85 and the support roll 86 is set by mechanical positioning, positioning sensors and control devices are unnecessary.
(6) Further, since the slab support device 73 has a very simple configuration, it can be easily manufactured and cost can be reduced.

  In addition, according to the slab support device 73 of the second embodiment, since each support roll 86 is provided with a spring 89, the influence of misalignment of each support roll 86 can be more reliably affected. Can be reduced.

  Further, according to the slab support device 74 (75, 76) of the second embodiment, the fixed drum 51 having the step portions 51a, 51b at both ends in the drum axial direction, and the moving drum 52, which is a flat drum, are provided. The end portions of the solidified shell 61 solidified on the outer peripheral surface of the fixed drum 51 and the solidified shell 62 solidified on the outer peripheral surface of the movable drum 52 are the step portions 51 a and 51 b of the fixed drum 51 and the drum shaft of the movable drum 52. Unsolidified molten steel including solidified shell crimping portions 64a and 64b crimped by both ends 52a and 52b in the direction at both ends in the slab width direction and including unsolidified molten steel between the solidified shell 61 and the solidified shell 62 A slab support device for a twin-drum type continuous casting facility for casting a slab 64 having a structure having a containing part 64c in the center part in the slab width direction, and a plurality of sets of steps 92a, 92 at both ends in the roll axial direction. The support roll 92 and the support roll 91 which is a flat roll are arranged opposite to each other, and a spring 94 is provided. By the pressing force of the spring 94, the step portions 92a and 92b of the support roll 92 and the roll of the support roll 91 are provided. The axial end portions 91a and 91b set the distance between the support roll 92 and the support roll 91 by pressing the solidified shell crimping portions 64a and 64b of the slab 64 from both sides in the slab thickness direction. The roll axial direction central portion 92c of the support roll 92 and the roll axial direction central portion 91c of the support roll 91 are configured to support the unsolidified molten steel-containing portion 64c of the slab 64 from both sides in the slab thickness direction. Therefore, the following effects can be obtained.

(1) That is, even if the thickness of the slab 64 changes during the casting of the bag-bound slab 64 in the twin drum type continuous casting equipment, the support roll 92 and the support are matched to the change (following easily). The interval between the rolls 91 is accurately set with reference to the solidified shell crimping portions 64a and 64b of the slab 64.
Accordingly, since the distance between the central portion 92c in the roll axis direction of the support roll 92 and the central portion 91c in the roll axial direction of the support roll 91 is also set with high accuracy, the central portion 92c in the roll axial direction of the support roll 92 and the support roll 92 The central portion 91c in the roll axial direction 91 of the slab 64 supports (presses) the unsolidified molten steel-containing portion 64c of the slab 64 from both sides in the slab thickness direction, so that the unsolidified molten steel-containing portions 64a and 64b of the slab 64 Bulging deformation can be reliably suppressed.
In this case, the pressing force of the spring 94 is such that the step portions 92a and 92b of the support roll 92 and the both end portions 91c of the support roll 91 in the roll axial direction are pressed by the pressing force of the spring 94. , 64b is pressed from both sides in the slab thickness direction to set a distance between the support roll 92 and the support roll 91, so that the central portion 92c of the support roll 92 in the roll axial direction and the roll axial direction of the support roll 91 are set. When the central portion 91c supports (presses) the unsolidified molten steel containing portion 64c of the slab 64 from both sides in the slab thickness direction, the bulging deformation of the unsolidified molten steel containing portion 64c of the slab 64 is suppressed. More than the minimum possible pressing force, and the step portions 92a and 92b of the support roll 92 and both end portions 91 of the support roll 91 in the roll axial direction. But it may be within the range maximum following the pressing force of no solidified shell crimp portion 64a to push crushing danger of the slab 64.
(2) Since the support rolls 91 and 92 are pressed against the slab 64 by the spring 94, even if the support rolls 91 and 92 are misaligned, the influence can be reduced.
(3) Since the allowable setting range of the pressing force is wide and it is not necessary to set the pressing force with high accuracy, a simple device such as a spring 94 can be used as the pressing means, and a conventional bulging force can be obtained. A complicated operation of accurately estimating and setting the interval between the support roll 92 and the support roll 91 and an accurate positioning device are unnecessary.
(4) Further, it is possible to reduce the waste of applying an excessive pressing force to the slab 64 due to an estimation error of the pressing force.
(5) Moreover, since the space | interval between the support roll 92 and the support roll 91 is set by mechanical positioning, the sensor and control apparatus for positioning are unnecessary.
(6) Since the slab support device 74 (75, 76) has a very simple configuration, it is easy to manufacture and can reduce costs.

  Further, according to the slab support device 74 (75, 76) of the second embodiment, since the spring 94 is provided for each set, the misalignment of the support rolls 91, 92 of each set is provided. Can be reduced more reliably.

  In the slab support devices 71 (72), 73, 74 (75, 76) of the second embodiment, the set pressing force of the springs 83, 89, 94 is the same as in the first embodiment. However, the pressing force is equal to or higher than the necessary pressing force capable of suppressing the bulging deformation of the unsolidified molten steel-containing portion 64c, and the end pressing load that is the load resistance of the solidified shell crimping portions 64a and 64b is added to the necessary pressing force. Since the pressure is set within a range equal to or lower than the pressure, the pressing force of the springs 83, 89, 94 is the minimum that can suppress the bulging deformation of the unsolidified molten steel containing portion 64c of the slab 64. The pressure is equal to or higher than the pressing force, and is within a range equal to or lower than the maximum pressing force with which there is no possibility of crushing the solidified shell crimping portions 64a and 64b of the slab 64.

  In the above description, the slab support device in the case where the moving drum 52 (second drum) is applied to a twin-drum type continuous casting facility in which the flat drum is used has been described. However, the present invention is not limited to this, and the slab support device of the present invention can also be applied to a twin drum type continuous casting facility in which the fixed drum 51 (first drum) is a flat drum.

  In this case, although not shown, in the twin-drum continuous casting facility, the fixed drum 51 (first drum) is a flat drum, while the moving drum 52 (second drum) is the same as the moving drum 2 in FIG. In this configuration, step portions are provided at both ends of the outer peripheral surface in the drum axial direction. In this twin-drum type continuous casting equipment, the ends of the first solidified shell solidified on the outer peripheral surface of the fixed drum 51 and the second solidified shell solidified on the outer peripheral surface of the moving drum 52 are both ends of the fixed drum 51 in the drum axial direction. And a solidified shell crimping portion crimped by the step portion of the moving drum 52 at both ends in the slab width direction, and the unsolidified molten steel is contained between the first solidified shell and the second solidified shell. A slab having a structure having a solidified molten steel-containing portion at the center in the slab width direction is cast.

And the structure of the slab support apparatus in this case should just be as follows. For example, although not shown, in the slab support device 71 in FIG. 12, the support roll 81 is replaced with a flat roll, and the roll shaft on the outer peripheral surface is the same as the support roll 31 (steps 31a and 31b) in FIG. What is necessary is just to set it as the structure which has a step part in the direction both ends.
In this case, by the pressing force of the spring 83, the stepped portion of the support roll 81 and both end portions in the drum axial direction of the fixed drum 51 press the solidified shell crimping portion of the slab from both sides in the slab thickness direction. The interval between the support roll and the fixed drum 51 is set so that the central portion in the roll axial direction of the support roll 81 (the portion between the step portions on both sides) and the central portion in the drum axial direction of the fixed drum 51 (the end portions on both sides). The portion between the two) supports the unsolidified molten steel-containing portion of the slab from both sides in the slab thickness direction.
Also in this case, the pressing force of the spring 83 is such that the step portion of the support roll 81 and the both ends of the fixed drum 51 in the drum axial direction cause the solidified shell crimping portion of the slab to move in the slab thickness direction. By pressing from both sides, the distance between the support roll 81 and the fixed drum 51 is set, and the central portion of the support roll 81 in the roll axial direction and the central portion of the fixed drum 51 in the drum axial direction are uncast solid steel. When the containing portion is supported (pressed) from both sides in the thickness direction of the slab, it is equal to or higher than the minimum pressing force capable of suppressing bulging deformation of the unsolidified molten steel-containing portion of the slab, and the support roll 81 The both ends of the step and the both ends of the fixed drum 51 in the drum axial direction may be within the range of the maximum pressing force that does not cause crushing of the solidified shell crimping portion of the slab.

Further, although not shown, in the slab support device 73 of FIG. 14, the fixed support 85 is replaced with the slab support surface 85 a in which the step portions 85 b and 85 c are formed, and a flat (no step portion) casting is performed. The support roll 86 is replaced with a flat roll and has stepped portions at both ends in the roll axial direction of the outer peripheral surface in the same manner as the support roll 36 (stepped portions 36a and 36b) of FIG. What is necessary is just composition.
In this case, due to the pressing force of the spring 89, both ends in the width direction of the slab support surface of the fixed support 85 and the stepped portion of the support roll 86 cause the solidified shell crimping portion of the slab to move from both sides in the slab thickness direction. By pressing, the interval between the fixed support 85 and the support roll 86 is set, and the center part in the width direction of the slab support surface of the fixed support 85 (the part between the ends on both sides) and the roll of the support roll 86 The central portion in the axial direction (the portion between the step portions on both sides) is configured to support the unsolidified molten steel-containing portion of the slab from both sides in the slab thickness direction.
Also in this case, the pressing force of the spring 89 is such that the both ends in the width direction of the slab support surface of the fixed support 85 and the stepped portion of the support roll 86 slab the solidified shell crimping portion of the slab. By pressing from both sides in the thickness direction, the distance between the fixed support 85 and the support roll 86 is set, and the center part in the width direction of the slab support surface of the fixed support 85 and the center part in the roll axial direction of the support roll 86 However, when the unsolidified molten steel-containing part of the slab is supported (pressed) from both sides in the slab thickness direction, the bulging deformation of the unsolidified molten steel-containing part of the slab is suppressed to a minimum pressing force or more. In addition, the both ends in the width direction of the slab support surface of the fixed support 85 and the step portion of the support roll 86 are within the range of the maximum pressing force that does not cause crushing of the solidified shell crimping portion of the slab. if there is There.

Moreover, although illustration is abbreviate | omitted, what is necessary is just to set it as the structure which replaced the support roll 92 and the support roll 91 in the slab support apparatus 74 of FIG. That is, in the slab support device 74 in FIG. 15, the support roll 92 (first support roll) is replaced with a configuration having the step portions 92 a and 92 b, and is a flat roll similar to the support roll 91 in FIG. 15, and Instead of the flat roll, the support roll 91 (second support roll) may be configured to have stepped portions at both ends in the roll axial direction of the outer peripheral surface, like the support roll 92 of FIG.
In this case, due to the pressing force of the spring 94, both ends of the support roll 92 in the roll axial direction and the step portion of the support roll 91 press the solidified shell crimping portion of the slab from both sides in the slab thickness direction. The interval between the support roll 92 and the support roll 91 is set so that the central portion of the support roll 92 in the roll axial direction (the portion between the end portions on both sides) and the central portion of the support roll 91 in the roll axial direction (the steps on both sides). The portion between the portions) is configured to support the unsolidified molten steel-containing portion of the slab from both sides in the slab thickness direction.
Also in this case, the pressing force of the spring 94 causes the both ends of the support roll 92 in the roll axial direction and the step portion of the support roll 91 to move the solidified shell crimping portion of the slab in the slab thickness direction. By pressing from both sides, the distance between the support roll 92 and the support roll 91 is set, and the central portion of the support roll 92 in the roll axial direction and the central portion of the support roll 91 in the roll axial direction are unsmelted molten steel. When the containing part is supported (pressed) from both sides in the thickness direction of the slab, it is equal to or higher than the minimum pressing force capable of suppressing bulging deformation of the unsolidified molten steel-containing part of the slab, and the support roll 92 It is only necessary that both end portions in the roll axial direction and the step portion of the support roll 91 are within the range of the maximum pressing force that does not cause crushing of the solidified shell crimping portion of the slab.

<Embodiment 3>
17 and 18 are a cross-sectional view and a front view showing the configuration of a slab support device arranged opposite to a fixed drum according to a third embodiment of the present invention, and FIGS. 19 and 20 are a third embodiment of the present invention. It is the cross-sectional view and front view which show the structure of the slab support apparatus arrange | positioned in the position away from the fixed drum concerning. The overall configuration of the twin-drum type continuous casting facility is the same as that of the first embodiment (see FIGS. 1 and 2), and therefore illustration and description thereof are omitted here.

  While the slab support device of the first embodiment is provided with a pressing means (spring) for each support roll, the slab support device of the third embodiment integrates a plurality of support rolls as a whole. A pressing means (spring) is provided so as to press the whole or a plurality of sets of support rolls integrally. That is, each segment (slab support device) is provided with a pressing means (spring). The rest of the slab support device of the third embodiment has the same configuration as the slab support device of the first embodiment.

  The slab support device 101 shown in FIGS. 17 and 18 can be provided in the twin drum continuous casting equipment of FIG. 1 instead of the slab support devices 21 and 22 of FIG. The slab support device 102 shown in FIG. 1 can be provided in the twin-drum continuous casting facility of FIG. 1 in place of the slab support devices 24 to 26 of FIG.

  More specifically, as shown in FIGS. 17 and 18, the slab support device 101 is arranged to face the fixed drum 1 (a plurality (examples shown) arranged to face the fixed drum 1 and to be parallel to the fixed drum 1. 5 support rolls 111. These support rolls 111 are parallel to each other and arranged in a line along the outer peripheral surface (arc) of the fixed drum 1. ing.

  Each support roll 111 is cylindrical (or columnar), and has step portions 111a and 111b extending over the entire circumference of the roll at both ends of the outer peripheral surface in the roll axis direction (left and right direction in FIG. 17). The outer diameters of these step portions 111a and 111b are larger than the outer diameter of the central portion 111c in the roll axis direction (the portion between the step portions 111a and 111b on both sides). In addition, the height of the step portions 111a and 111b from the outer peripheral surface of the central portion 111c in the roll axis direction of the support roll 111 (the difference between the outer diameter of the step portions 111a and 111b and the outer diameter of the central portion 111c in the roll axis direction) is moved. The height of the step portions 2a and 2b from the outer peripheral surface of the drum axial direction central portion 2c in the drum 2 (see FIGS. 1 and 2) (the outer diameter of the step portions 2a and 2b and the outer diameter of the drum axial direction central portion 2c). Difference).

  Each support roll 111 is rotatably supported by a bearing 112. The bearing 112 is fixed to a plate-like frame 113. Further, a plate-like frame 114 fixed to a fixing portion (not shown) is disposed on the back side of the frame 113. In addition, springs 115 are interposed at the four corners between the frame 113 and the frame 114. The spring 115 integrally pushes the plurality of support rolls 111 together with the frame 113 toward the fixed drum 1 side.

  By the pressing force of the spring 115 that integrally presses the plurality of support rolls 111 (the setting of the pressing force is the same as in the case of the first embodiment), the step portions 111a and 111b of the support roll 111 and the fixed drum 1 are The step portions 1a and 1b press the solidified shell crimping portions 14a and 14b of the slab 14 from both sides in the slab thickness direction (vertical direction in FIG. 15), whereby the distance between the support roll 111 and the fixed drum 1 is reached. Is set, and the central portion 111c in the roll axial direction of the support roll 111 and the central portion 1c in the drum axial direction of the fixed drum 1 support the unsolidified molten steel-containing portion 14c of the slab 14 from both sides in the slab thickness direction. (Press). Thus, bulging deformation of the slab 14 (unsolidified molten steel containing portion 14 c) is suppressed by the support roll 111 and the fixed drum 1.

  As shown in FIGS. 19 and 20, the slab support device 102 includes a plurality of support rolls 122 (five in the illustrated example) as first support rolls and a plurality (five in the illustrated example) as second support rolls. The support roll 121 is provided. The plurality of support rolls 121 are located on the lower side of the slab 14, are arranged in parallel with each other and in a straight line along the drawing direction of the slab 14, and the plurality of support rolls 122 are arranged on the upper side of the slab 14. Are arranged parallel to each other and in a straight line along the drawing direction of the slab 14. Further, the support rolls 121 and the support rolls 122 are opposed to each other (arranged so as to face each other in parallel). In other words, the slab support device 102 includes a plurality of sets (five sets in the illustrated example) of support rolls 121 and support rolls 122 arranged to face each other.

  Each support roll 121 has a cylindrical shape (or a columnar shape), and has step portions 121a and 121b extending over the entire circumference of the roll at both ends of the outer peripheral surface in the roll axis direction (left and right direction in FIG. 17). The outer diameters of these step portions 121a and 121b are larger than the outer diameter of the central portion 121c in the roll axis direction (the portion between the step portions 121a and 121b on both sides). Further, the height of the step portions 121a and 121b from the outer peripheral surface of the roll axial center portion 121c in the support roll 121 (the difference between the outer diameter of the step portions 121a and 121b and the outer diameter of the roll axial center portion 121c) is moved. The height of the step portions 2a and 2b from the outer peripheral surface of the drum axial direction central portion 2c in the drum 2 (see FIGS. 1 and 2) (the outer diameter of the step portions 2a and 2b and the outer diameter of the drum axial direction central portion 2c). Difference).

  Each support roll 122 has a cylindrical shape (or a columnar shape), and has step portions 122a and 122b over the entire circumference of the roll at both ends in the roll axis direction (left and right direction in FIG. 17) of the outer peripheral surface. The outer diameters of these step portions 122a and 122b are larger than the outer diameter of the central portion 122c in the roll axis direction (the portion between the step portions 122a and 122b on both sides). Further, the height of the stepped portions 122a and 122b from the outer peripheral surface of the central portion 122c in the roll axial direction of the support roll 122 (the difference between the outer diameter of the stepped portions 122a and 122b and the outer diameter of the central portion 122c in the roll axial direction) is fixed. The height of the step portions 1a, 1b from the outer peripheral surface of the drum axial direction central portion 1c in the drum 1 (the difference between the outer diameter of the step portions 1a, 1b and the outer diameter of the drum axial direction central portion 1c) is the same. .

  Each support roll 121 is rotatably supported by a bearing 123. The bearing 123 is fixed to a plate-like horizontal frame 124. Further, a plate-like horizontal frame 125 is disposed on the back side of the horizontal frame 124. Then, springs 126 are interposed at the four corners between the horizontal frame 124 and the horizontal frame 125. The spring 126 integrally pushes the plurality of support rolls 121 together with the horizontal frame 124 toward the support roll 122. Each support roll 122 is rotatably supported by a bearing 127. The bearing 127 is connected to a plate-like horizontal frame 128. The lower horizontal frame 125 and the upper horizontal frame 128 are coupled to each other via bar-shaped vertical frames 129 disposed at these four corners. The vertical frame 129 passes through the horizontal frame 124 that supports the support roll 121 (not fixed to the horizontal frame 124), and is inserted through the spring 126. The horizontal frame 124 is pressed by the pressing force of the spring 126. It also functions as a guide member that guides the (support roll 121) when it moves. The horizontal frames 125 and 128 are fixed to a fixing portion (not shown).

  By the pressing force of the spring 126 that integrally presses the plurality of support rolls 121 (the setting of the pressing force is the same as in the case of the first embodiment), the steps 121a and 121b of the support roll 121 and the support roll 122 The step portions 122a and 122b press the solidified shell crimping portions 14a and 14b of the slab 14 from both sides in the slab thickness direction (vertical direction in FIG. 17), thereby separating the support roll 121 and the support roll 122 from each other. Is set, and the roll axial direction central portion 121c of the support roll 121 and the roll axial direction central portion 122c of the support roll 122 support the unsolidified molten steel-containing portion 14c of the slab 14 from both sides in the slab thickness direction. (Press). Thus, the bulging deformation of the slab 14 (unsolidified molten steel containing portion 14c) is suppressed by the support roll 121 and the support roll 122.

  From the above, according to the slab support device 101 of the third embodiment, the same effects as the slab support device 21 of the first embodiment can be obtained.

  Further, according to the slab support device 101 of the third embodiment, since the spring 115 is provided so as to integrally press the plurality of support rolls 111, the support rolls 111 are provided for each support roll 111. It is not necessary to set a pressing force by providing a spring, and the pressing force can be set for a plurality of support rolls 111, so that the manufacturing is easy.

  Further, according to the slab support device 102 of the third embodiment, the same effects as those of the slab support device 24 of the first embodiment can be obtained.

  Further, according to the slab support device 102 of the third embodiment, the slab support device 102 includes the spring 126 so as to integrally press the plurality of support rolls 121 and 122 as a whole. Since it is not necessary to set a pressing force by providing a spring for each set, and the pressing force can be set for a plurality of sets of support rolls 121 and 122, manufacturing is easy.

In addition, although illustration is abbreviate | omitted, it replaces with the slab support apparatus 23 of FIG. 1, and the slab support apparatus provided with the press means (spring) so that the whole several support roll may be pressed integrally is shown in FIG. It can also be provided in a twin drum type continuous casting facility.
For example, similarly to the slab support device 101 of FIG. 17, in the slab support device 23 of FIG. 6, instead of providing a spring 39 for each support roll 36, it is fixed to the fixing portion on the back side of the frame 40. And a plurality of support rolls 36 are integrally pushed together with the frame 40 toward the fixed support 35 by springs interposed in the four corners between the frame and the frame 40. do it.
Since this slab support device is also characterized in that a spring is provided so as to integrally press the plurality of support rolls 40 as a whole, it is necessary to set a pressing force by providing a spring for each support roll 40. In addition, the pressing force can be set collectively for the plurality of support rolls 40, so that the manufacturing is easy.

  Further, here, in the slab support device of the first embodiment, instead of including a pressing means (spring) for each support roll, the pressing means (spring) so as to integrally press the entire plurality of support rolls. Or a case in which a pressing means (spring) is provided so as to integrally press a plurality of sets of support rolls instead of having a pressing means (spring) for each set. Without limitation, in the slab support device of the above-described second embodiment and the slab support device of the following fourth embodiment, instead of including a pressing means (spring) for each support roll, a plurality of Instead of providing pressing means (springs) so as to integrally press the entire support roll, or providing pressing means (springs) for each set, a plurality of sets The entire port roll may comprise a pressing means (spring) so as to press together.

<Embodiment 4>
FIG.21 and FIG.22 is the cross-sectional view and front view which show the structure of the slab support apparatus arrange | positioned facing the fixed drum which concerns on Example 4 of Embodiment of this invention. FIG. 23 (a) is a side view showing the configuration of the slab support device in which the slab according to Embodiment 4 of the present invention is located at a position away from the fixed drum (G direction arrow in FIG. 23 (b)). 23 (b) is a front view of the slab support device, and FIG. 23 (c) is a bottom view showing the fixed support of the slab support device (an arrow H in FIG. 23 (b)). FIG. 24 and FIG. 25 are a side view and a front view showing the configuration of the slab support device arranged at a position away from the fixed drum according to Embodiment 4 of the present invention. The overall configuration of the twin-drum type continuous casting facility is the same as that of the first embodiment (see FIGS. 1 and 2), and therefore illustration and description thereof are omitted here.

  In the slab support device of the first embodiment, the support roll is provided with a step, whereas in the slab support device of the fourth embodiment, instead of providing the support roll, a support is provided. An end roll separate from the roll is provided. That is, the step portion of the support roll and the central portion in the roll axial direction are separated. The rest of the slab support device of the fourth embodiment has the same configuration as the slab support device of the first embodiment.

  The slab support device 201 shown in FIGS. 21 and 22 can be provided in the twin drum continuous casting equipment of FIG. 1 instead of the slab support devices 21 and 22 of FIG. The piece support device 203 can be provided in the twin-drum type continuous casting facility of FIG. 1 instead of the slab support device 23 of FIG. 1, and the slab support device 202 shown in FIGS. Instead of the slab support devices 24 to 26, the twin drum continuous casting equipment of FIG. 1 can be provided.

  More specifically, as shown in FIGS. 21 and 22, the slab support device 201 is disposed in a plurality of positions (disposed so as to face the fixed drum 1 and be parallel to the fixed drum 1). In the example shown, five support rolls 211 are provided. These support rolls 211 are parallel to each other, and are arranged in a line along the outer peripheral surface (arc) of the fixed drum 1.

  Each support roll 211 is cylindrical (or columnar), and is a flat roll (a roll having a constant outer diameter in the roll axial direction (left and right direction in FIG. 19)) that does not have a stepped portion on the outer peripheral surface. Yes. End rolls 212 are provided on both sides of each support roll 211 in the roll axial direction. The end roll 212 is disposed to face the fixed drum 1 (steps 1 a and 1 b) and can be rotated separately from the support roll 211.

  That is, the end roll 212 has an outer rotary shaft 212 a rotatably supported by the bearing 213. The bearing 213 is connected to the plate-like frame 215 via a spring 214 as a pressing means provided for each support roll 211. The frame 215 is fixed to a fixing portion (not shown). Further, the rotation shaft 212 b inside the end roll 212 is rotatably supported by a bearing 216. On the other hand, the support roll 211 (rotating shaft 211a) is rotatably supported by a bearing 217. The bearing 216 and the bearing 217 are connected by a cylindrical connecting member 218 (which may be other connecting means).

  Therefore, the support roll 211 supported by the bearing 217 and the end roll 212 supported by the bearings 213 and 216 can rotate separately (independently from each other). On the other hand, the pressing force of the spring 214 acts not only on the end roll 212 but also on the support roll 211 via the bearing 213, end roll 212, bearing 216, connecting member 218 (connecting means) and bearing 217. That is, the support roll 211 and the end roll 212 can be rotated separately, and can be moved integrally in a direction perpendicular to the roll axis direction (vertical direction in FIG. 19). The spring 214 pushes the end roll 212 and the support roll 211 toward the fixed drum 1 side.

  The outer diameter of the end roll 212 is larger than the outer diameter of the support roll 211. Moreover, the height of the end roll 212 from the outer peripheral surface of the support roll 211 (the difference between the outer diameter of the end roll 212 and the outer diameter of the support roll 211) is the drum in the moving drum 2 (see FIGS. 1 and 2). The height of the step portions 2a and 2b from the outer peripheral surface of the axial center portion 2c (the difference between the outer diameter of the step portions 2a and 2b and the outer diameter of the drum axial center portion 2c) is the same.

  For this reason, by the pressing force of the spring 214 (the setting of the pressing force is the same as in the case of the first embodiment), the end roll 212 and the steps 1a and 1b of the fixed drum 1 are By pressing the solidified shell crimping portions 14a and 14b from both sides in the slab thickness direction (vertical direction in FIG. 19), the distance between the support roll 211 and the fixed drum 1 is determined, and the support roll 211 and the fixed drum 1 are determined. The central portion 1c in the drum axial direction supports (presses) the unsolidified molten steel-containing portion 14c of the slab 14 from both sides in the slab thickness direction. Thus, bulging deformation of the slab 14 (unsolidified molten steel containing portion 14 c) is suppressed by the support roll 211 and the fixed drum 1.

  As shown in FIG. 23A, FIG. 23B, and FIG. 23C, the slab support device 203 has a fixed support 241 and a plurality (three in the illustrated example) arranged to face the fixed support 241. The support roll 242 is provided. The slab 14 is arranged at a position away from the fixed drum 1.

  The fixed support 241 has a triangular side surface, that is, the thickness of the side surface becomes thinner toward the upstream side in the drawing direction of the slab 14 (the direction of arrow I in FIG. 23B). These are disposed in a triangular gap 243 between the upper surface of the slab 14 immediately after being separated from the lower surface of the fixed drum 1. Step portions 241b and 241c are formed at both ends of the slab support surface (lower surface) 241a of the fixed support 241 in the width direction (left-right direction in FIG. 23A). These step portions 241b and 241c protrude below the center portion 241d in the width direction of the slab support surface 241a (the portion between the step portions 241b and 241c on both sides). The heights of the step portions 241b and 241c from the surface of the width direction central portion 241d are the heights of the step portions 1a and 1b (step portions 1a and 1b from the outer peripheral surface of the drum axial direction central portion 1c of the fixed drum 1). And the difference in the outer diameter of the central portion 1c in the drum axial direction).

  The plurality of support rolls 242 are positioned below the slab 14, and are arranged in a straight line in a row along the direction in which the slab 14 is pulled out in parallel with each other. Each support roll 242 has a cylindrical shape (or a columnar shape) and does not have a step portion on the outer peripheral surface (a roll having a constant outer diameter over the entire roll axis direction (left and right direction in FIG. 23A)). It has become. End rolls 244 are provided on both sides of each support roll 242 in the roll axial direction. The end roll 244 is disposed to face the fixed support 241 (steps 241b and 241c) and is rotatable separately from the support roll 242.

  That is, the end roll 244 is supported by the bearing 245 so that the outer rotating shaft 244 a can rotate freely. The bearing 245 is connected to the plate-like frame 247 via a spring 246 as a pressing means provided for each support roll 242. The frame 247 is fixed to a fixing portion (not shown). Further, the rotation shaft 244 b inside the end roll 244 is rotatably supported by a bearing 248. On the other hand, the support roll 242 (rotating shaft 242a) is rotatably supported by a bearing 249. The bearing 248 and the bearing 249 are connected by a cylindrical connecting member 250 (other connecting means may be used).

  Accordingly, the support roll 242 supported by the bearing 249 and the end roll 244 supported by the bearings 245 and 248 can rotate separately (independently from each other). On the other hand, the pressing force of the spring 246 acts not only on the end roll 244 but also on the support roll 242 via the bearing 245, end roll 244, bearing 248, connecting member 250 (connecting means), and bearing 249. That is, the support roll 242 and the end roll 244 can be rotated separately, and can be moved integrally in a direction perpendicular to the roll axis direction (vertical direction in FIG. 23A). The spring 246 pushes the end roll 244 and the support roll 242 toward the fixed support 241 side.

  In addition, the outer diameter of the end roll 244 is larger than the outer diameter of the support roll 242. Moreover, the height of the end roll 244 from the outer peripheral surface of the support roll 242 (the difference between the outer diameter of the end roll 244 and the outer diameter of the support roll 242) is the drum in the moving drum 2 (see FIGS. 1 and 2). The height of the step portions 2a and 2b from the outer peripheral surface of the axial center portion 2c (the difference between the outer diameter of the step portions 2a and 2b and the outer diameter of the drum axial center portion 2c) is the same.

  For this reason, the step portions 241b and 241c of the fixed support 241 and the end roll 244 are brought into contact with the slab 14 by the pressing force of the spring 246 (the setting of the pressing force is the same as in the first embodiment). The interval between the fixed support 241 and the support roll 242 is determined by pressing the solidified shell crimping portions 14a and 14b from both sides in the slab thickness direction (vertical direction in FIG. 23A). The center part 241d in the width direction of the slab support surface 241a and the support roll 242 support (press) the unsolidified molten steel-containing part 14c of the slab 14 from both sides in the slab thickness direction. Thus, bulging deformation of the slab 14 (unsolidified molten steel containing portion 14c) is suppressed by the fixed support 241 and the support roll 242.

  As shown in FIGS. 24 and 25, the slab support device 202 includes a plurality of support rolls 222 as the first support roll (five in the illustrated example) and a plurality of support rolls 222 as the second support roll (five in the illustrated example). The support roll 221 is provided. The plurality of support rolls 221 are located on the lower side of the slab 14, are arranged in a straight line in parallel with each other and along the drawing direction of the slab 14, and the plurality of support rolls 222 are arranged on the upper side of the slab 14. Are arranged parallel to each other and in a straight line along the drawing direction of the slab 14. In addition, the support rolls 221 and the support rolls 222 are opposed to each other (arranged so as to face each other in parallel). That is, the slab support device 202 includes a plurality of sets (five sets in the illustrated example) of support rolls 221 and support rolls 222 that are arranged to face each other.

  Each support roll 221 has a cylindrical shape (or a columnar shape) and is a flat roll (a roll having a constant outer diameter over the entire roll axial direction (left-right direction in FIG. 21)) having no stepped portion on the outer peripheral surface. Yes. And the end roll 223 as a 2nd end roll is provided in the roll axial direction both ends of each support roll 221. As shown in FIG. The end roll 223 is rotatable separately from the support roll 221.

  In other words, the end roll 223 has an outer rotary shaft 223 a that is rotatably supported by the bearing 224. The bearing 224 is connected to a plate-like frame 226 via a spring 225 as a pressing means provided for each support roll 221. The rotation shaft 223 b inside the end roll 223 is rotatably supported by a bearing 227. On the other hand, the support roll 221 (rotating shaft 221a) is rotatably supported by a bearing 228. The bearing 227 and the bearing 228 are coupled by a cylindrical coupling member 229 (other coupling means may be used).

  Therefore, the support roll 221 supported by the bearing 228 and the end roll 223 supported by the bearings 224 and 227 can rotate separately (independently from each other). On the other hand, the pressing force of the spring 225 acts not only on the end roll 223 but also on the support roll 221 via the bearing 224, end roll 223, bearing 227, connecting member 229 (connecting means), and bearing 228. That is, the support roll 221 and the end roll 223 can be rotated separately, and can be moved integrally in a direction perpendicular to the roll axis direction (vertical direction in FIG. 21). The spring 225 pushes the end roll 223 and the support roll 221 toward the support roll 222 side.

  In addition, the outer diameter of the end roll 223 is larger than the outer diameter of the support roll 221. Moreover, the height of the end roll 223 from the outer peripheral surface of the support roll 221 (the difference between the outer diameter of the end roll 223 and the outer diameter of the support roll 221) is the drum in the moving drum 2 (see FIGS. 1 and 2). The height of the step portions 2a and 2b from the outer peripheral surface of the axial center portion 2c (the difference between the outer diameter of the step portions 2a and 2b and the outer diameter of the drum axial center portion 2c) is the same.

  Each support roll 222 has a cylindrical shape (or a columnar shape) and is a flat roll (a roll having a constant outer diameter over the entire roll axial direction (left-right direction in FIG. 21)) having no stepped portion on the outer peripheral surface. Yes. End rolls 230 as first end rolls are provided on both sides of each support roll 222 in the roll axial direction. The end roll 230 is rotatable separately from the support roll 222.

  That is, the end roll 230 (rotary shaft 230a) is rotatably supported by the bearing 231. The bearing 231 is fixed to a plate-like frame 232. On the other hand, the support roll 222 (rotating shaft 222a) is rotatably supported by a bearing 233. The bearing 233 is fixed to the frame 232. Therefore, the support roll 222 supported by the bearing 233 and the end roll 230 supported by the bearing 231 can rotate separately (independently from each other). The outer diameter of the end roll 230 is larger than the outer diameter of the support roll 222. Moreover, the height of the end roll 230 from the outer peripheral surface of the support roll 222 (the difference between the outer diameter of the end roll 230 and the outer diameter of the support roll 222) is the outer peripheral surface of the central portion 1c in the drum axial direction of the fixed drum 1. Is the same as the height of the step portions 1a and 1b (the difference between the outer diameter of the step portions 1a and 1b and the outer diameter of the drum shaft direction central portion 1c).

  Further, the lower horizontal frame 226 and the upper horizontal frame 232 are coupled via bar-shaped vertical frames 234 arranged at these four corners. The horizontal frames 226 and 232 are fixed to a fixing portion (not shown).

  For this reason, the end roll 223 and the end roll 230 are brought into contact with the solidified shell crimping portion 14a of the slab 14 by the pressing force of the spring 225 (setting of the pressing force is the same as in the first embodiment). , 14b from both sides in the slab thickness direction (vertical direction in FIG. 24), the distance between the support roll 221 and the support roll 222 is set, and the support roll 221 and the support roll 222 are slab cast. Fourteen unsolidified molten steel-containing portions 14c are supported (pressed) from both sides in the slab thickness direction. Thus, the bulging deformation of the slab 14 (unsolidified molten steel containing portion 14c) is suppressed by the support roll 221 and the support roll 222.

  As described above, according to the slab support device 201 of the fourth embodiment, the fixed drum 1 having the step portions 1a and 1b at both end portions in the drum axial direction, and the step portions 2a and 2b at both end portions in the drum axial direction. The solidified shell 11 solidified on the outer peripheral surface of the fixed drum 1 and the solidified shell 12 solidified on the outer peripheral surface of the movable drum 2 are end portions 1a and 1b of the fixed drum 1. And the solidified shell crimping portions 14a and 14b crimped by the step portions 2a and 2a of the moving drum 2 at both ends in the slab width direction, and unsolidified molten steel is formed between the solidified shell 11 and the solidified shell 12. A slab support device for a twin-drum type continuous casting facility for casting a slab having a structure including an unsolidified molten steel-containing portion including a c in the center of the slab width direction, and a flat roll disposed opposite to the fixed drum 1 Multiple support robots , And an end roll 212 which is disposed opposite to the fixed drum 1 on both sides in the roll axis direction of the support roll 211 and can be rotated separately from the support roll 211, and a spring 214. The end roll 212 and the stepped portions 1a, 1b of the fixed drum 1 press the solidified shell crimping portions 14a, 14b of the slab 14 from both sides in the slab thickness direction by the pressing force of the support roll 211. The support roll 211 and the drum axial center 1c of the fixed drum 1 support the unsolidified molten steel containing portion 14c of the slab 14 from both sides in the slab thickness direction. Since it is characterized by having a configuration, the following effects can be obtained.

(1) That is, even when the thickness of the slab 14 changes during the casting of the bag-bound slab 14 with the twin-drum type continuous casting equipment, the support roll 211 is fixed in accordance with the change (following easily). The interval between the drums 1 is accurately set with reference to the solidified shell crimping portions 14a and 14b of the slab 14.
Accordingly, the distance between the support roll 211 and the central portion 1c in the drum axial direction of the fixed drum 1 is also set with high accuracy. Therefore, the central portion 1c in the drum axial direction of the support roll 211 and the fixed drum 1 By supporting (pressing) the unsolidified molten steel-containing portion 14c from both sides in the slab thickness direction, bulging deformation of the unsolidified molten steel-containing portion 14c of the slab 14 can be reliably suppressed.
In this case, the pressing force of the spring 214 is such that the end roll 121 and the stepped portions 1a and 1b of the fixed drum 1 cause the solidified shell crimping portions 14a and 14b of the slab 14 to have a slab thickness. By pressing from both sides in the vertical direction, the distance between the support roll 211 and the fixed drum 1 is set, and the support roll 211 and the central portion 1c in the drum axial direction of the fixed drum 1 are unsolidified molten steel of the slab 14. When the containing portion 14c is supported (pressed) from both sides in the thickness direction of the slab, it is equal to or higher than the minimum pressing force capable of suppressing bulging deformation of the unsolidified molten steel-containing portion 14c of the slab 14, and The step part 1a, 1b of the end roll 212 and the fixed drum 1 only needs to be within the range of the maximum pressing force that does not cause crushing of the solidified shell crimping part 14a, 14b of the slab 14.
(2) Moreover, since the support roll 211 is pressed against the slab 14 by the spring 214, even if the support roll 211 has misalignment, the influence can be reduced.
(3) Further, since the allowable setting range of the pressing force is wide and it is not necessary to set the pressing force with high accuracy, a simple device such as a spring 214 can be used as the pressing means, and a conventional bulging force can be obtained. There is no need for a complicated operation such as accurately estimating and setting the interval between the support roll 211 and the fixed drum 1 and an accurate positioning device.
(4) Further, it is possible to reduce the waste of applying an excessive pressing force to the slab due to an estimation error of the pressing force.
(5) Further, since the distance between the support roll 211 and the fixed drum 1 is set by mechanical positioning, positioning sensors and control devices are unnecessary.
(6) Further, since the slab support device 201 has a very simple configuration, it can be easily manufactured and the cost can be reduced.
(7) Since the slab 14 is supported between the support roll 211 and the fixed drum 1 and pressed against the fixed drum 1 by the pressing force of the spring 214, the cooling effect of the slab 14 by the fixed drum 1 is also achieved. I can expect.
(8) Further, since the end roll 212 that is rotatable separately from the support roll 211 is provided, even if the outer diameter (circumferential speed) of the support roll 211 and the end roll 212 is different, the support roll 211 or Slipping between the end roll 212 and the slab 14 can be prevented.

  Further, according to the slab support device 203 of the fourth embodiment, the fixed drum 1 having the step portions 1a and 1b at both ends in the drum axial direction and the movement having the step portions 2a and 2b at both ends in the drum axial direction. The end portions of the solidified shell 11 solidified on the outer peripheral surface of the fixed drum 1 and the solidified shell 12 solidified on the outer peripheral surface of the movable drum 2 are provided with the steps 1a and 1b of the fixed drum 1 and the movable drum. The solidified shell crimping portions 14a and 14b crimped by the two step portions 2a and 2a are provided at both ends in the slab width direction, and the solidified shell 11 and the solidified shell 12 include unsolidified molten steel. A slab support device for a twin drum type continuous casting facility for casting a slab 14 having a structure having a molten steel containing portion 14c in the center part in the slab width direction, and step portions 241b at both ends of the slab support surface 241a in the width direction. , 241c with fixed support 241, a plurality of support rolls 242 that are arranged to face the fixed support 241 and are flat rolls, and are arranged to face the fixed support 241 on both sides in the roll axial direction of the support roll 242, and separately from the support roll 242 A rotatable end roll 244 and a spring 246 are provided. By the pressing force of the spring 246, the end roll 244 and the step portions 241b and 241c of the fixed support 241 are solidified shell crimping portion 14a of the slab 14. , 14b are pressed from both sides in the slab thickness direction to set a distance between the fixed support 241 and the support roll 242, and the width direction central portion 241d of the slab support surface 241a of the fixed support 241 and the support roll 242, the unsolidified molten steel-containing portion 14c of the slab 14 is moved in the slab thickness direction. Because it is characterized in that a structure for supporting the, the following effects can be obtained.

(1) That is, even when the thickness of the slab 14 changes during the casting of the bag-bound slab 14 in the twin drum type continuous casting equipment, the fixed support 241 and the support are matched to the change (following easily). The interval between the rolls 242 is accurately set with reference to the solidified shell crimping portions 14a and 14b of the slab 14.
Accordingly, since the interval between the width direction central portion 241d of the slab support surface 241a of the fixed support 241 and the support roll 242 is also set with high accuracy, the width direction central portion 241d of the slab support surface 241a of this fixed support 241 is set. And the support roll 242 support (press) the unsolidified molten steel-containing portion 14c of the slab 14 from both sides in the slab thickness direction, thereby reliably suppressing bulging deformation of the unsolidified molten steel-containing portion 14c of the slab 14 can do.
In this case, the pressing force of the spring 246 causes the end roll 244 and the stepped portions 241b and 241c of the fixed support 241 to press the solidified shell crimping portions 14a and 14b of the slab 14 by the slab thickness. By pressing from both sides in the vertical direction, an interval between the fixed support 241 and the support roll 242 is set, and the width direction central portion 241d of the slab support surface 241a of the fixed support 241 and the support roll 242 are connected to the slab 14. When the unsolidified molten steel-containing portion 14c is supported (pressed) from both sides in the slab thickness direction, the bulging deformation of the unsolidified molten steel-containing portion 14c of the slab 14 can be suppressed to a minimum pressing force or more. And the end roll 244 and the stepped portions 241b and 241c of the fixed support 241 push the solidified shell crimping portions 14a and 14b of the slab 14. It may be within the scope of the following maximum pressing force unlikely to cause collapse.
(2) Further, since the support roll 242 is pressed against the slab 14 by the spring 246, even if the support roll 242 is misaligned, the influence can be reduced.
(3) Further, since the allowable setting range of the pressing force is wide and it is not necessary to set the pressing force with high accuracy, a simple device such as a spring 246 can be used as the pressing means, and a conventional bulging force can be used. This eliminates the need for complicated operations such as accurately estimating the distance between the fixed support 241 and the support roll 242 and a highly accurate positioning device.
(4) Further, it is possible to reduce the waste of applying an excessive pressing force to the slab due to an estimation error of the pressing force.
(5) Further, since the interval between the fixed support 241 and the support roll 242 is set by mechanical positioning, positioning sensors and control devices are unnecessary.
(6) Further, since the slab support device 203 has a very simple configuration, it can be easily manufactured and the cost can be reduced.
(7) Further, since the end roll 244 that is rotatable separately from the support roll 242 is provided, even if the outer diameter (circumferential speed) of the support roll 242 and the end roll 244 is different, the support roll 242 Slipping between the end roll 244 and the cast piece 14 can be prevented.

  Further, according to the slab support device 202 of the fourth embodiment, the fixed drum 1 having the step portions 1a and 1b at both ends in the drum axial direction and the movement having the step portions 2a and 2b at both ends in the drum axial direction. The end portions of the solidified shell 11 solidified on the outer peripheral surface of the fixed drum 1 and the solidified shell 12 solidified on the outer peripheral surface of the movable drum 2 are provided with the steps 1a and 1b of the fixed drum 1 and the movable drum. The solidified shell crimping portions 14a and 14b crimped by the two step portions 2a and 2a are provided at both ends in the slab width direction, and the solidified shell 11 and the solidified shell 12 include unsolidified molten steel. A slab support device of a twin-drum type continuous casting facility for casting a slab 14 having a structure having a molten steel containing portion 14c in the center part in the slab width direction, which includes a support roll 222 and a flat roll, which are a plurality of flat rolls. A certain The end rolls 230 that are rotatable separately from the support rolls 222, and are arranged on both sides of the support rolls 221 in the roll axial direction. In addition, an end roll 223 that can rotate separately from the support roll 221 and a spring 225 are provided, and the end roll 230 and the end roll 223 are solidified by the pressing force of the spring 225. The space between the support roll 222 and the support roll 221 is set by pressing the shell crimping part 14c from both sides in the slab thickness direction so that the first support roll and the second support roll are the slab. The unsolidified molten steel-containing part of the slab is supported from both sides in the slab thickness direction. Action effect UNA is obtained.

(1) That is, even when the thickness of the slab 14 changes during casting of the bag-bound slab 14 in the twin-drum type continuous casting facility, the support roll 222 and the support are supported in accordance with the change (following easily). The interval between the rolls 221 is accurately set with reference to the solidified shell crimping portions 14a and 14b of the slab 14.
Accordingly, the support roll 222 and the support roll 221 support (press) the unsolidified molten steel-containing portion 14c of the slab 14 from both sides in the thickness direction of the slab, thereby bulging the unsolidified molten steel-containing portion 14c of the slab 14. Deformation can be reliably suppressed.
In this case, the pressing force of the spring 225 causes the end roll 230 and the end roll 223 to push the solidified shell crimping portions 14a and 14b of the slab 14 from both sides in the slab thickness direction. By pressing, the distance between the support roll 222 and the support roll 221 is set, and the support roll 222 and the support roll 221 support the unsolidified molten steel-containing portion 14c of the slab 14 from both sides in the slab thickness direction. (Pressing) More than the minimum pressing force capable of suppressing the bulging deformation of the unsolidified molten steel-containing portion 14c of the slab 14, and the end roll 230 and the end roll 223 are the slab. It suffices to be within the range of the maximum pressing force that does not cause crushing of the 14 solidified shell crimping portions 14a and 14b.
(2) Since the support rolls 221 and 230 are pressed against the cast piece 14 by the spring 225, even if the support rolls 221 and 230 are misaligned, the influence can be reduced.
(3) Moreover, since the allowable setting range of the pressing force is wide and it is not necessary to set the pressing force with high accuracy, a simple device such as a spring 225 can be used as the pressing means, and a conventional bulging force can be used. This eliminates the need for complicated operations such as accurately estimating the distance between the support roll 222 and the support roll 221 and a highly accurate positioning device.
(4) Further, it is possible to reduce the waste of applying an excessive pressing force to the slab due to an estimation error of the pressing force.
(5) Moreover, since the space | interval between the support roll 222 and the support roll 221 is set by mechanical positioning, the positioning sensor and control apparatus are unnecessary.
(6) Further, since the slab support device 202 has a very simple configuration, it can be easily manufactured and the cost can be reduced.
(7) Further, since the end roll 230 that can be rotated separately from the support roll 222 and the end roll 223 that can be rotated separately from the support roll 221 are provided, the support rolls 221 and 222 and the end roll are provided. Even if the outer diameters (peripheral speeds) of 223 and 230 are different, slipping between the support rolls 221 and 222 and the end rolls 223 and 230 and the cast piece 14 can be prevented.

  In the above, in the same configuration as the slab support device of the first embodiment, instead of providing a step portion on the support roll, the support roll is a flat roll and the support roll is provided on both sides in the roll axial direction. Although the case where the roll and the separate end roll are provided so that the support roll and the end roll can be rotated separately has been described, of course, the present invention is not limited to this. Embodiments 2 and 3 In the same configuration as the slab support device, instead of providing a step portion on the support roll, the support roll is a flat roll, and the support roll and a separate end roll are provided on both sides in the roll axial direction of the support roll. It is good also as providing and making the said support roll and the said edge part roll rotatable separately.

For example, although illustration is omitted, the slab support device 74 of FIG. 15 may be configured to use the support roll 222 and the end roll 230 of FIG. That is, instead of providing the support roll 92 with the step portions 92a and 92b, the support roll 92 is a flat roll similar to the support roll 2222 of FIG. Then, like the end roll 230 of FIG. 24, the end rolls are arranged on both sides of the support roll 92 in the roll axial direction so that they can rotate separately from the support roll 92.
In this case, due to the pressing force of the spring 94, both ends 91a, 91b of the support roll 91 in the roll axial direction and end rolls on both sides of the support roll 92 in the roll axial direction are brought into contact with the solidified shell crimping portions 64a, 64b of the slab 64. Is pressed from both sides in the slab thickness direction to set the distance between the support roll 92 and the support roll 91, and the center portion 91 c in the roll axial direction of the support roll 92 and the support roll 91 is It becomes the structure which supports the unsolidified molten steel containing part 64c from the both sides of slab thickness direction.
Also in this case, the pressing force of the spring 94 is such that the both ends in the roll axis direction of the support roll 91 and the end rolls on both sides in the roll axis direction of the support roll 92 are pressed by the pressing force of the spring 94. The distance between the support roll 92 and the support roll 91 is set by pressing 64a and 64b from both sides in the slab thickness direction, so that the central portion 91c in the roll axial direction of the support roll 92 and the support roll 91 is cast. Minimum pressing force capable of suppressing bulging deformation of the unsolidified molten steel-containing portion 64c of the slab 64 when the unsolidified molten steel-containing portion 64c of the piece 64 is supported (pressed) from both sides in the slab thickness direction. The end rolls 91a and 91b in the roll axial direction of the support roll 91 and the end rolls on both sides in the roll axial direction of the support roll 92 are cast as described above. 64 of solidified shell crimping portion 64a, may be within the scope of the following maximum without risk of crushing the 64b pressing force.

  Moreover, the slab support apparatus of this invention is applicable also to the twin drum type continuous casting installation whose fixed drum 1 (1st drum) is a flat drum.

  In this case, although not shown, the twin-drum type continuous casting equipment includes a fixed drum 1 (first drum) that is a flat drum, and a moving drum 2 having stepped portions 2a and 2b at both ends of the outer peripheral surface in the drum axial direction. (Second drum) (see FIG. 2). In this twin-drum type continuous casting equipment, the ends of the first solidified shell solidified on the outer peripheral surface of the fixed drum 1 and the second solidified shell solidified on the outer peripheral surface of the moving drum 2 are both ends in the drum axial direction of the fixed drum 1. And the solidified shell crimping portions crimped by the step portions 2a and 2b of the moving drum 2 at both ends in the slab width direction, and unsolidified molten steel between the first solidified shell and the second solidified shell A cast slab having a structure including an unsolidified molten steel-containing portion including slag in the center portion in the slab width direction (a portion between the solidified shell crimping portions on both sides) is cast.

In this case, the slab support device 201 of FIG. 21 can be used as it is.
In this case, both ends of the end roll 212 and the fixed drum 1 in the drum axial direction press the solidified shell crimping portion of the slab from both sides in the slab thickness direction by the pressing force of the spring 214, thereby supporting the slab. The distance between the roll 211 and the fixed drum 1 is set, and the support roll 211 and the central portion in the drum axial direction of the fixed drum 1 (the portion between the end portions on both sides) cast the unsolidified molten steel-containing portion of the slab. The structure is supported from both sides in the thickness direction.
In this case as well, the pressing force of the spring 214 is such that the end roller 212 and both ends of the fixed drum 1 in the drum axial direction are pressed against the solidified shell crimping portion of the slab by both sides of the slab thickness direction. Is pressed to set the distance between the support roll 211 and the fixed drum 1, and the central portion of the support roll 211 and the fixed drum 1 in the drum axial direction is the slab thickness of the unsolidified molten steel-containing part. When it is supported (pressed) from both sides in the direction, it is equal to or higher than the minimum pressing force capable of suppressing bulging deformation of the unsolidified molten steel-containing portion of the slab, and the end roll 212 and the drum of the fixed drum 1 The axial direction both ends should just be in the range below the maximum pressing force which does not have a possibility of crushing the solidification shell crimping part of a slab.

Although not shown, in the slab support device 203 of FIG. 23A, the fixed support 241 is replaced with a slab support surface 241a on which the step portions 241b and 241c are formed, and a flat (step portion is No) A structure having a slab support surface may be used.
In this case, the both ends in the width direction of the slab support surface of the fixed support 241 and the end rolls 244 press the solidified shell crimping portion of the slab from both sides in the slab thickness direction by the pressing force of the spring 246. Thus, the distance between the fixed support 241 and the support roll 242 is set so that the center portion in the width direction of the slab support surface of the fixed support 241 (the portion between the end portions on both sides) and the support roll 242 The unsolidified molten steel-containing portion is supported from both sides in the slab thickness direction.
Also in this case, the pressing force of the spring 246 is determined by the pressing force of the spring 246 so that both ends of the slab support surface of the fixed support 241 in the width direction and the end roll 244 use the solidified shell crimping portion of the slab as the slab thickness By pressing from both sides in the direction, the interval between the fixed support 241 and the support roll 242 is set, and the center portion in the width direction of the slab support surface of the fixed support 241 and the support roll 242 are made of unsolidified molten steel of the slab. When the containing part is supported (pressed) from both sides in the slab thickness direction, it is equal to or higher than the minimum pressing force capable of suppressing bulging deformation of the unsolidified molten steel containing part of the slab, and the fixed support 241 The width direction both ends of the slab support surface and the end roll 244 may be within the range of the maximum pressing force that does not cause crushing of the solidified shell crimping portion of the slab.

Moreover, although illustration is abbreviate | omitted, in the slab support apparatus 202 of FIG. 24, the edge part roll 230 is not provided and the support roll 222 should just be made into the support roll similar to the support roll 81 of FIG.
In this case, the both ends of the support roll 222 in the roll axial direction and the end roll 223 press the solidified shell crimping portion of the slab from both sides in the slab thickness direction by the pressing force of the spring 225, thereby supporting the slab. The distance between the roll 222 and the support roll 221 is set so that the center portion in the roll axial direction of the support roll 222 (the portion between the end portions on both sides) and the support roll 221 cast the unsolidified molten steel-containing portion of the slab. The structure is supported from both sides in the thickness direction.
Also in this case, the pressing force of the spring 225 causes the both ends of the support roll 222 in the roll axial direction and the end roll 223 to press the solidified shell crimping portion of the slab from both sides in the slab thickness direction. By pressing, the interval between the support roll 222 and the support roll 221 is set, and the center part of the support roll 222 in the axial direction of the roll axis and the support roll 221 make the unsolidified molten steel-containing part of the slab in the slab thickness direction. When the support is pressed (pressed) from both sides, it is equal to or higher than the minimum pressing force capable of suppressing bulging deformation of the unsolidified molten steel-containing portion of the slab, and both ends and ends of the support roll 222 in the roll axial direction The part roll 223 should just be in the range below the maximum pressing force which does not have a possibility of crushing the solidification shell crimping part of slab.

  In the first to fourth embodiments, the case where a spring is used as the pressing means has been described. However, the present invention is not limited to this. For example, a constant pressure cylinder (such as an air cylinder or a hydraulic cylinder with a constant pressing force) is used. You may use as a press means.

  TECHNICAL FIELD The present invention relates to a slab support device, and is applied to a slab support device for supporting a bag binding slab cast by a twin drum continuous casting facility and suppressing bulging deformation of the bag binding slab. It is useful.

DESCRIPTION OF SYMBOLS 1 Fixed drum 1a, 1b Step part 1c Drum axial direction center part 2 Moving drum 2a, 2b Step part 2c Drum axial direction center part 3 Side dam 5 Internal space (puddle part)
6 Tundish 7 Nozzle 8 Molten steel 11, 12 Solidified shell 13 Minimum gap (kissing point)
14 Cast slabs 14a, 14b Solidified shell crimping part 14c Unsolidified molten steel containing part 21-26 Slab support device 31 Support rolls 31a, 31b Stepped part 31c Roll axial direction central part 32 Bearing 33 Spring 34 Frame 35 Fixed support 35a Slab support Surface 35b, 35c Step 35d Axial center 36 Support roll 36a, 36b Step 37 Gap 38 Bearing 39 Spring 40 Frame 41 Support roll 41a, 41b Step 41c Roll axial center 42 Support roll 42a, 42b Roll axial Center part 42c Roll axis direction center part 43 Bearing 44 Spring 45 Horizontal frame 46 Bearing 47 Horizontal frame 48 Vertical frame 51 Fixed drum 51a, 51b Step part 51c Drum axial direction central part 52 Beam 52a, 52b the drum shaft direction end portions 53 side checks 61, 62 solidified shell 63 minimum gap portion (Kissing Point)
64 Cast slabs 64a, 64b Solidified shell crimping part 64c Unsolidified molten steel containing part 71-76 Slab support device 81 Support rolls 81a, 81b Roll axial direction both ends 81c Roll axial direction central part 82 Bearing 83 Spring 84 Frame 85 Fixed support 85a Cast slab support surface 85b, 85c Stepped portion 85d Center in width direction 86 Support rolls 86a, 86b Both ends in roll axis direction 86c Center in roll axis direction 87 Clearance 88 Bearing 89 Spring 90 Frame 91 Support rolls 91a, 91b Both ends in roll axis direction 91c Roll axis direction center part 92 Support rolls 92a, 92b Roll axis direction both ends 92c Roll axis direction center part 93 Bearing 94 Spring 95 Horizontal frame 96 Bearing 97 Horizontal frame 98 Vertical frame 10 , 102 Cast slab support device 111 Support roll 111a, 111b Step portion 111c Roll axial direction center portion 112 Bearing 113 Frame 114 Frame 115 Spring 121 Support roll 121a, 121b Step portion 121c Roll axial direction center portion 122 Support roll 122a, 122b Step portion 122c Roll axis direction central portion 123 Bearing 124, 125 Horizontal frame 126 Spring 127 Bearing 128 Horizontal frame 129 Vertical frame 201, 202, 203 Slab support device 211 Support roll 211a Rotating shaft 212 End roll 212a, 212b Rotating shaft 213 Bearing 214 Spring 215 Frame 216, 217 Bearing 218 Connecting member 221 Support roll 221a Rotating shaft 222 Support Port roll 222a Rotating shaft 223 End roll 223a, 223b Rotating shaft 224 Bearing 225 Spring 226 Horizontal frame 227, 228 Bearing 229 Connecting member 230 End roll 230a Rotating shaft 231 Bearing 232 Horizontal frame 233 Bearing 234 Vertical frame 241 Fixed support 241a Casting Single support surface 241b, 241c Stepped portion 241d Center in width direction 242 Support roll 242a Rotating shaft 243 Clearance 244 End roll 244a, 244b Rotating shaft 245 Bearing 246 Spring 247 Frame 248, 249 Bearing 250 Connecting member

Claims (17)

A first drum having stepped portions at both ends in the drum axial direction; and a second drum having stepped portions at both ends in the drum axial direction, the first solidified shell solidified on the outer peripheral surface of the first drum; Solidified shell crimping portions in which the ends of the second solidified shell solidified on the outer peripheral surface of the second drum are pressure-bonded by the stepped portion of the first drum and the stepped portion of the second drum are formed at both ends of the slab width direction. And a twin-drum continuous casting of a slab having a structure including an unsolidified molten steel containing portion including unsolidified molten steel between the first solidified shell and the second solidified shell at a central portion in a slab width direction. A slab support device for a casting facility,
At least one support roll disposed opposite to the first drum and having stepped portions at both ends in the roll axial direction;
Pressing means,
By the pressing force of the pressing means, the step portion of the support roll and the step portion of the first drum press the solidified shell crimping portion of the slab from both sides in the slab thickness direction, thereby the support roll. And the distance between the first drum and the central part of the support roll in the roll axial direction and the central part of the first drum in the drum axial direction are the thickness of the unsolidified molten steel-containing part of the slab. A slab support device characterized in that it is configured to support from both sides in the vertical direction. A first drum having stepped portions at both ends in the drum axial direction; and a second drum having stepped portions at both ends in the drum axial direction, the first solidified shell solidified on the outer peripheral surface of the first drum; Solidified shell crimping portions in which the ends of the second solidified shell solidified on the outer peripheral surface of the second drum are pressure-bonded by the stepped portion of the first drum and the stepped portion of the second drum are formed at both ends of the slab width direction. And a twin-drum continuous casting of a slab having a structure including an unsolidified molten steel containing portion including unsolidified molten steel between the first solidified shell and the second solidified shell at a central portion in a slab width direction. A slab support device for a casting facility,
A fixed support having stepped portions at both ends in the width direction of the slab support surface;
At least one support roll that is disposed opposite to the fixed support and has step portions at both ends in the roll axial direction;
Pressing means,
By the pressing force of the pressing means, the stepped portion of the fixed support and the stepped portion of the support roll press the solidified shell crimping portion of the slab from both sides in the slab thickness direction, thereby The interval between the support rolls is set so that the center part in the width direction of the slab support surface of the fixed support and the center part in the roll axial direction of the support roll are the thickness of the unsolidified molten steel-containing part of the slab. A slab support device characterized in that it is configured to support from both sides in the vertical direction. A first drum having stepped portions at both ends in the drum axial direction; and a second drum having stepped portions at both ends in the drum axial direction, the first solidified shell solidified on the outer peripheral surface of the first drum; Solidified shell crimping portions in which the ends of the second solidified shell solidified on the outer peripheral surface of the second drum are pressure-bonded by the stepped portion of the first drum and the stepped portion of the second drum are formed at both ends of the slab width direction. And a twin-drum continuous casting of a slab having a structure including an unsolidified molten steel containing portion including unsolidified molten steel between the first solidified shell and the second solidified shell at a central portion in a slab width direction. A slab support device for a casting facility,
At least one set of first support rolls having stepped portions at both ends in the roll axial direction and second support rolls having stepped portions at both ends in the roll axial direction are arranged to face each other.
And a pressing means,
By the pressing force of this pressing means, the step portion of the first support roll and the step portion of the second support roll press the solidified shell pressure-bonding portion of the slab from both sides in the slab thickness direction, The interval between the first support roll and the second support roll is set, and the central part in the roll axial direction of the first support roll and the central part in the roll axial direction of the second support roll are the parts of the slab. A slab support device characterized in that the unsolidified molten steel-containing part is supported from both sides in the slab thickness direction. A first drum having stepped portions at both ends in the drum axial direction and a second drum that is a flat drum, a first solidified shell solidified on an outer peripheral surface of the first drum, and an outer peripheral surface of the second drum The solidified shell crimping portions, which are crimped by the stepped portions of the first drum and the two drum axial end portions of the second drum, at both ends of the slab width direction, And a twin-drum continuous casting facility for casting a slab having a structure including an unsolidified molten steel-containing portion including unsolidified molten steel at a central portion in a slab width direction between the first solidified shell and the second solidified shell. A slab support device,
At least one support roll which is disposed opposite the first drum and which is a flat roll;
Pressing means comprising a spring or a constant pressure cylinder that pushes the support roll toward the first drum ,
By the pressing force of the pressing means, both ends in the roll axis direction of the support roll and the stepped portion of the first drum press the solidified shell pressure-bonding portion of the slab from both sides in the slab thickness direction, The interval between the support roll and the first drum is set, and the central part in the roll axial direction of the support roll and the central part in the drum axial direction of the first drum are the unsolidified molten steel-containing part of the slab. A slab support device characterized by being configured to support from both sides in the slab thickness direction. A first drum having stepped portions at both ends in the drum axial direction and a second drum that is a flat drum, a first solidified shell solidified on an outer peripheral surface of the first drum, and an outer peripheral surface of the second drum The solidified shell crimping portions, which are crimped by the stepped portions of the first drum and the two drum axial end portions of the second drum, at both ends of the slab width direction, And a twin-drum continuous casting facility for casting a slab having a structure including an unsolidified molten steel-containing portion including unsolidified molten steel at a central portion in a slab width direction between the first solidified shell and the second solidified shell. A slab support device,
A fixed support having stepped portions at both ends in the width direction of the slab support surface;
At least one support roll that is disposed opposite the fixed support and is a flat roll;
Pressing means,
By the pressing force of the pressing means, the stepped portion of the fixed support and both end portions in the roll axial direction of the support roll press the solidified shell crimping portion of the slab from both sides in the slab thickness direction, thereby The space between the fixed support and the support roll is set, and the center portion in the width direction of the slab support surface of the fixed support and the center portion in the roll axial direction of the support roll are the unsolidified molten steel-containing portion of the slab. A slab support device characterized in that the slab is supported from both sides in the slab thickness direction. A first drum having stepped portions at both ends in the drum axial direction and a second drum that is a flat drum, a first solidified shell solidified on an outer peripheral surface of the first drum, and an outer peripheral surface of the second drum The solidified shell crimping portions, which are crimped by the stepped portions of the first drum and the two drum axial end portions of the second drum, at both ends of the slab width direction, And a twin-drum continuous casting facility for casting a slab having a structure including an unsolidified molten steel-containing portion including unsolidified molten steel at a central portion in a slab width direction between the first solidified shell and the second solidified shell. A slab support device,
At least one pair of first support rolls having stepped portions at both ends in the roll axial direction and second support rolls that are flat rolls are arranged to face each other.
And a pressing means,
Due to the pressing force of the pressing means, the step portion of the first support roll and the both ends in the roll axial direction of the second support roll press the solidified shell crimping portion of the slab from both sides in the slab thickness direction. Thus, the distance between the first support roll and the second support roll is set, and the center part in the roll axis direction of the first support roll and the center part in the roll axis direction of the second support roll are A slab support device, wherein the unsolidified molten steel-containing portion of the slab is supported from both sides in the slab thickness direction. A first drum, which is a flat drum, and a second drum having step portions at both ends in the drum axial direction, a first solidified shell solidified on the outer peripheral surface of the first drum, and an outer peripheral surface of the second drum The solidified shell crimping portions, which are crimped by the both ends in the drum axial direction of the first drum and the stepped portions of the second drum, at the ends of the slab width direction, And a twin-drum continuous casting facility for casting a slab having a structure including an unsolidified molten steel-containing portion including unsolidified molten steel at a central portion in a slab width direction between the first solidified shell and the second solidified shell. A slab support device,
At least one support roll disposed opposite to the first drum and having stepped portions at both ends in the roll axial direction;
Pressing means,
By the pressing force of the pressing means, the step portion of the support roll and the drum axial direction both ends of the first drum press the solidified shell crimping portion of the slab from both sides in the slab thickness direction, The interval between the support roll and the first drum is set, and the central part in the roll axial direction of the support roll and the central part in the drum axial direction of the first drum are the unsolidified molten steel-containing part of the slab. A slab support device characterized by being configured to support from both sides in the slab thickness direction. A first drum, which is a flat drum, and a second drum having step portions at both ends in the drum axial direction, a first solidified shell solidified on the outer peripheral surface of the first drum, and an outer peripheral surface of the second drum The solidified shell crimping portions, which are crimped by the both ends in the drum axial direction of the first drum and the stepped portions of the second drum, at the ends of the slab width direction, And a twin-drum continuous casting facility for casting a slab having a structure including an unsolidified molten steel-containing portion including unsolidified molten steel at a central portion in a slab width direction between the first solidified shell and the second solidified shell. A slab support device,
A fixed support having a slab support surface;
At least one support roll that is disposed opposite to the fixed support and has step portions at both ends in the roll axial direction;
Pressing means,
Due to the pressing force of the pressing means, both ends in the width direction of the slab support surface of the fixed support and the step portions of the support roll press the solidified shell crimping portion of the slab from both sides in the slab thickness direction. Thus, the interval between the fixed support and the support roll is set, and the center part in the width direction of the slab support surface of the fixed support and the center part in the roll axial direction of the support roll are not A slab support device characterized in that the solidified molten steel-containing portion is supported from both sides in the slab thickness direction. A first drum, which is a flat drum, and a second drum having step portions at both ends in the drum axial direction, a first solidified shell solidified on the outer peripheral surface of the first drum, and an outer peripheral surface of the second drum The solidified shell crimping portions, which are crimped by the both ends in the drum axial direction of the first drum and the stepped portions of the second drum, at the ends of the slab width direction, And a twin-drum continuous casting facility for casting a slab having a structure including an unsolidified molten steel-containing portion including unsolidified molten steel at a central portion in a slab width direction between the first solidified shell and the second solidified shell. A slab support device,
At least one set of first support rolls that are flat rolls and second support rolls having stepped portions at both ends in the roll axial direction are arranged to face each other.
And a pressing means,
Due to the pressing force of the pressing means, both end portions in the roll axial direction of the first support roll and the step portions of the second support roll press the solidified shell crimping portion of the slab from both sides in the slab thickness direction. Thus, the distance between the first support roll and the second support roll is set, and the center part in the roll axis direction of the first support roll and the center part in the roll axis direction of the second support roll are A slab support device, wherein the unsolidified molten steel-containing portion of the slab is supported from both sides in the slab thickness direction. A first drum having stepped portions at both ends in the drum axial direction; and a second drum having stepped portions at both ends in the drum axial direction, the first solidified shell solidified on the outer peripheral surface of the first drum; Solidified shell crimping portions in which the ends of the second solidified shell solidified on the outer peripheral surface of the second drum are pressure-bonded by the stepped portion of the first drum and the stepped portion of the second drum are formed at both ends of the slab width direction. And a twin-drum continuous casting of a slab having a structure including an unsolidified molten steel containing portion including unsolidified molten steel between the first solidified shell and the second solidified shell at a central portion in a slab width direction. A slab support device for a casting facility,
At least one support roll which is disposed opposite the first drum and which is a flat roll;
An end roll that is disposed opposite to the first drum on both sides in the roll axial direction of the support roll, and is rotatable separately from the support roll;
Pressing means,
By the pressing force of the pressing means, the end roll and the stepped portion of the first drum press the solidified shell pressure-bonding portion of the slab from both sides in the slab thickness direction, whereby the support roll and the The interval between the first drums is set, and the support roll and the drum axial direction center portion of the first drum support the unsolidified molten steel-containing portion of the slab from both sides in the slab thickness direction. A slab support device characterized by that. A first drum having stepped portions at both ends in the drum axial direction; and a second drum having stepped portions at both ends in the drum axial direction, the first solidified shell solidified on the outer peripheral surface of the first drum; Solidified shell crimping portions in which the ends of the second solidified shell solidified on the outer peripheral surface of the second drum are pressure-bonded by the stepped portion of the first drum and the stepped portion of the second drum are formed at both ends of the slab width direction. And a twin-drum continuous casting of a slab having a structure including an unsolidified molten steel containing portion including unsolidified molten steel between the first solidified shell and the second solidified shell at a central portion in a slab width direction. A slab support device for a casting facility,
A fixed support having stepped portions at both ends in the width direction of the slab support surface;
At least one support roll that is disposed opposite the fixed support and is a flat roll;
An end roll that is disposed opposite to the fixed support on both sides in the roll axial direction of the support roll and is rotatable separately from the support roll;
Pressing means,
By the pressing force of the pressing means, the end roll and the stepped portion of the fixed support press the solidified shell crimping portion of the slab from both sides in the thickness direction of the slab, thereby the fixed support and the support. The interval between the rolls is set, and the center portion in the width direction of the slab support surface of the fixed support and the support roll support the unsolidified molten steel-containing portion of the slab from both sides in the slab thickness direction. A slab support device characterized by having a configuration. A first drum having stepped portions at both ends in the drum axial direction; and a second drum having stepped portions at both ends in the drum axial direction, the first solidified shell solidified on the outer peripheral surface of the first drum; Solidified shell crimping portions in which the ends of the second solidified shell solidified on the outer peripheral surface of the second drum are pressure-bonded by the stepped portion of the first drum and the stepped portion of the second drum are formed at both ends of the slab width direction. And a twin-drum continuous casting of a slab having a structure including an unsolidified molten steel containing portion including unsolidified molten steel between the first solidified shell and the second solidified shell at a central portion in a slab width direction. A slab support device for a casting facility,
At least one set of a first support roll that is a flat roll and a second support roll that is a flat roll are arranged to face each other.
And a first end roll disposed on both sides of the first support roll in the roll axial direction and rotatable separately from the first support roll;
A second end roll disposed on both sides of the second support roll in the roll axial direction and rotatable separately from the second support roll;
Pressing means,
By the pressing force of the pressing means, the first end roll and the second end roll press the solidified shell crimping portion of the slab from both sides in the slab thickness direction, thereby the first support. An interval between the roll and the second support roll is set, and the first support roll and the second support roll support the unsolidified molten steel-containing portion of the slab from both sides in the slab thickness direction. A slab support device characterized by having a configuration. A first drum having stepped portions at both ends in the drum axial direction and a second drum that is a flat drum, a first solidified shell solidified on an outer peripheral surface of the first drum, and an outer peripheral surface of the second drum The solidified shell crimping portions, which are crimped by the stepped portions of the first drum and the two drum axial end portions of the second drum, at both ends of the slab width direction, And a twin-drum continuous casting facility for casting a slab having a structure including an unsolidified molten steel-containing portion including unsolidified molten steel at a central portion in a slab width direction between the first solidified shell and the second solidified shell. A slab support device,
At least one set of a first support roll that is a flat roll and a second support roll that is a flat roll are arranged to face each other.
And the end rolls that are arranged on both sides of the first support roll in the roll axial direction and are rotatable separately from the first support roll,
Pressing means,
By the pressing force of this pressing means, both ends of the second support roll in the axial direction of the roll and the end roll press the solidified shell crimping portion of the slab from both sides in the slab thickness direction, thereby An interval between the first support roll and the second support roll is set, and the center part in the roll axial direction of the first support roll and the second support roll casts the unsolidified molten steel-containing part of the slab. A slab support device characterized in that it is configured to support from both sides in the thickness direction. A first drum, which is a flat drum, and a second drum having step portions at both ends in the drum axial direction, a first solidified shell solidified on the outer peripheral surface of the first drum, and an outer peripheral surface of the second drum The solidified shell crimping portions, which are crimped by the both ends in the drum axial direction of the first drum and the stepped portions of the second drum, at the ends of the slab width direction, And a twin-drum continuous casting facility for casting a slab having a structure including an unsolidified molten steel-containing portion including unsolidified molten steel at a central portion in a slab width direction between the first solidified shell and the second solidified shell. A slab support device,
At least one support roll which is disposed opposite the first drum and which is a flat roll;
An end roll that is disposed opposite to the first drum on both sides in the roll axial direction of the support roll, and is rotatable separately from the support roll;
Pressing means,
By the pressing force of the pressing means, the end roll and both end portions in the drum axial direction of the first drum press the solidified shell crimping portion of the slab from both sides in the slab thickness direction, thereby supporting the support. The distance between the roll and the first drum is set, and the central portion of the support roll and the first drum in the drum axial direction is the unsolidified molten steel-containing portion of the slab from both sides in the thickness direction A slab support device characterized in that it is configured to support. A first drum, which is a flat drum, and a second drum having step portions at both ends in the drum axial direction, a first solidified shell solidified on the outer peripheral surface of the first drum, and an outer peripheral surface of the second drum The solidified shell crimping portions, which are crimped by the both ends in the drum axial direction of the first drum and the stepped portions of the second drum, at the ends of the slab width direction, And a twin-drum continuous casting facility for casting a slab having a structure including an unsolidified molten steel-containing portion including unsolidified molten steel at a central portion in a slab width direction between the first solidified shell and the second solidified shell. A slab support device,
A fixed support having a slab support surface;
At least one support roll that is disposed opposite the fixed support and is a flat roll;
An end roll that is disposed opposite to the fixed support on both sides in the roll axial direction of the support roll and is rotatable separately from the support roll;
Pressing means,
By the pressing force of the pressing means, both ends in the width direction of the slab support surface of the fixed support and the end rolls press the solidified shell crimping portion of the slab from both sides in the slab thickness direction. The space between the fixed support and the support roll is set so that the center portion in the width direction of the slab support surface of the fixed support and the support roll have a thickness of the unsolidified molten steel-containing portion of the slab. A slab support device characterized in that it is configured to support from both sides in the vertical direction. A first drum, which is a flat drum, and a second drum having step portions at both ends in the drum axial direction, a first solidified shell solidified on the outer peripheral surface of the first drum, and an outer peripheral surface of the second drum The solidified shell crimping portions, which are crimped by the both ends in the drum axial direction of the first drum and the stepped portions of the second drum, at the ends of the slab width direction, And a twin-drum continuous casting facility for casting a slab having a structure including an unsolidified molten steel-containing portion including unsolidified molten steel at a central portion in a slab width direction between the first solidified shell and the second solidified shell. A slab support device,
At least one set of a first support roll that is a flat roll and a second support roll that is a flat roll are arranged to face each other.
And the end rolls arranged on both sides in the roll axial direction of the second support roll and rotatable separately from the second support roll,
Pressing means,
By the pressing force of the pressing means, both ends in the roll axial direction of the first support roll and the end roll press the solidified shell crimping portion of the slab from both sides in the slab thickness direction, thereby The space | interval between a 1st support roll and the said 2nd support roll is set, The roll axial direction center part of the said 1st support roll and the said 2nd support roll cast the said unsolidified molten steel content part of the said slab. A slab support device characterized in that it is configured to support from both sides in the thickness direction. The slab support device according to any one of claims 1 to 16,
The set pressing force of the pressing means is equal to or higher than the required pressing force capable of suppressing bulging deformation of the unsolidified molten steel-containing portion, and the end pressure resistance that is the load resistance of the solidified shell crimping portion to the required pressing force. A slab support device characterized in that it is set within a range equal to or less than a pressing force to which a load is applied.

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