JPS61189868A - Mechanism for tightening of sliding gate device for controlling discharge of molten metal - Google Patents

Abstract

PURPOSE:To provide the titled sliding gate device which permits the quick and easy maintenance and inspection of a spring mechanism for constituting a tightening mechanism cooperatively with a toggle mechanism in particular by constituting the above- mentioned spring mechanism in such a manner that the one end side thereof can be attached to and detected from a cover housing. CONSTITUTION:A spring box 22 is practically detached from the cover housing 18 as shown by a virtual line when, for example, the operation of the tightening mechanism 1b on the right side is held released. The spring box 22 is therefore quickly and easily cooled even if the housing 18 is exposed to a relatively high temp. On the other hand, an operation arm 47 is turned around the axial center 49a of a shaft 49 in a J1 direction to exert force to an arm 47 in the case of tightening the gate device by the mechanism 1b. The part 46 of the arm 47 is connected to the end 44 of a connecting arm 43 by a shaft 45 and therefore the part 46 of the arm 47 and the axial center 45a of the shaft 45 are turned in a G2 direction around the axial center 41a of the shaft 41, by which the shaft 49 for connecting the arm 47 and the spring box 22 and the box 22 are oscillated approximately in a G2 direction. Since the toggle mechanism is utilized for the mechanism 1 in the above-mentioned manner, the tightening operation is made quicker than by the conventional mechanism.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a slide gate device for controlling the discharge of molten metal such as molten steel from a container such as a ladle or a tundish, and more particularly, In order to bring the upper surface of the sliding plate into pressure contact with the lower surface of the fixed plate of the device, a housing is provided between a base housing that supports the fixed plate in a fixed manner and a cover housing that supports the sliding plate in a slidable manner. It relates to a tightening mechanism consisting of a toggle mechanism and a spring mechanism.

[Prior Art] It is known to use a toggle mechanism as a tightening mechanism instead of using a plurality of tightening bolts or nuts.

However, in this type of slide gate device that has been proposed in the past, the spring box that cooperates with the toggle mechanism to constitute the tightening mechanism is fixedly provided on the base housing or cover housing, which is easily exposed to high temperatures. There is (Jikai 50-
(See Japanese Utility Model Publication No. 107705 and Japanese Utility Model Publication No. 59-17497).

[Problems to be Solved by the Invention] In the conventional tightening mechanism, the spring box is fixedly provided to the base housing or cover housing, which is easily exposed to high temperatures, so there is a risk that the spring box will deteriorate in a relatively short period of time. It is difficult to maintain and inspect the springs of the spring box in a short period of time.

The present invention has been made in view of the above-mentioned points, and an object of the present invention is to provide a melting method that allows maintenance and inspection of a spring mechanism that cooperates with a toggle mechanism to constitute a tightening mechanism to be easily performed in a short period of time. Tightening of slide gate device for metal discharge control i
The aim is to provide a structure.

[Means for Solving the Problems] According to the present invention, the above-described object is such that the longer arm of a pair of arms constituting the toggle mechanism is rotatably connected to the base housing at one end side. One end of the spring mechanism can be moved toward and away from the cover housing.
The other end of the spring mechanism is elastically connected to the one end of the spring mechanism by a spring of the spring mechanism, and the one end of the spring mechanism is separated from the cover housing when the longer arm is in the first rotational position. When the longer arm is in the second rotational position, A slide gate device for controlling discharge of molten metal connected to the other end of the long arm so that the one end of the spring mechanism is pressed against the cover housing so as to press the upper surface of the plate against the lower surface of the fixed plate. This is achieved by the tightening mechanism.

[Operations and Effects] In the tightening mechanism of the slide gate device for controlling molten metal discharge of the present invention, in particular, one end side of the spring mechanism that cooperates with the toggle mechanism to constitute the tightening mechanism approaches and separates from the cover housing. the one end of the spring mechanism when the longer arm of the pair of arms constituting the toggle mechanism, which is rotatably connected to the base housing at one end, is in the first rotational position; Since the long arm is connected to the other end of the spring mechanism or the other end of the long arm so that the side is spaced apart from the cover housing, the long arm is first When the spring mechanism is set to the position shown in FIG. Maintenance and inspection can be easily performed in a relatively short time.

In addition, in the tightening mechanism of the present invention, since the spring mechanism etc. are separated from the cover housing when the tightening is released, the cover housing itself is made smaller compared to the conventional one in which a spring box is fixed to the cover housing. In addition, the sliding plate can be easily replaced.

[Example] Next, a slide gate device @ 2 using the tightening mechanism 1 of the first preferred embodiment of the present invention is attached to the bottom 4 of the tundish 3.
An example applied to this will be explained based on FIG.

5 is a base housing detachably attached to the bottom plate 6 of the bottom wall 4 of the tanditshu 3 with bolts or the like;
A fixed platen 1 made of refractory is attached to the base housing 5 made of gold I so as to have a welding hole 9 aligned with the nozzle hole 8 of the upper nozzle 7 arranged in the bottom part 4 of the tundish.
0 is fixed.

Reference numeral 11 denotes a sliding plate in which a sliding plate main body 13 made of refractory is fixed to a sliding metal frame 12, and the sliding plate 11 is connected to A via two pairs of liner parts 14, 15, ie, and 17. , B direction (
It is supported by a cover housing 18 so as to be slidable in a direction (perpendicular to the paper plane of FIG. 1). Left and right tightening mechanisms 1a, 1
b is the left and right 7 zinc parts 19.2 of the cover housing 18;
One end of the spring box 21.22 as a spring mechanism has a pressing part 25.26 as the other end which can be elastically displaced with respect to the main body 23.24 as one side (in the C direction). ), the main body 13 of the sliding plate 11
The upper surface 27 is pressed against the lower surface 28 of the stationary platen 10.

Note that each spring box 21, 22 is provided with a cooling mechanism.

The left tightening mechanism 18 includes a dogleg-shaped connecting arm 32 that is rotatably connected in the D direction at one end 31 via a shaft 30 to a lower end 29 on one side of the base housing 5; An operation arm 36 is connected to the other end 33 via a shaft 34 at a portion 35 so as to be rotatable in the E direction, and a portion 37 of the operation 36 is connected to the main body 23 through a shaft 38 so as to be rotatable in the F direction. The pressing portion 25, which is biased in the P direction with respect to the main body portion 23 by a plurality of internal coil springs 39, pushes the seven zinc portion 19 in the C direction. Note that 21a is a screw for adjusting the spring force of the spring 39 and adjusting the surface pressure.

The right tightening mechanism 1b, which is formed symmetrically with the left tightening mechanism 1a, is connected at one end 42 to the lower end 40 of the other side of the base housing 5 via a shaft 41 so as to be rotatable in the C direction. an operation arm 47 connected to the other end 44 of the connection arm 43 via a shaft 45 at a portion 46 so as to be rotatable in the H direction, and a portion 48 of the operation arm 47.
is connected to the main body 24 via a shaft 49 so as to be rotatable in the J direction.
The spring box 22 presses the flange portion 20 in the C direction with a suppressing portion 26 biased in the C direction by 0. Here, the toggle mechanism consists of an arm 43 and an arm 47 as the longer arm. Note that 22a is a screw for adjusting the spring force of the spring 50 and adjusting the surface pressure.

The tightening mechanism 1 is operated as follows.

Since the left and right tightening mechanisms 1a and 1b are constructed in the same way, only the right tightening mechanism 1b will be described in detail below as an example.

When the tightening operation of the tightening mechanism 1b is released, each member of the tightening mechanism 1b is in a state or position as shown by the imaginary line (two-dot chain line) in FIG. 1, for example. That is, the tightening mechanism 1
The connecting arm 43 in b is rotationally displaced in the G1 direction compared to the tightening (surface pressure setting) position shown by the solid line, and as the shaft 45 connected to the other end 44 of the arm 43 rotates in the G1 direction. The other shaft 49 connected to the operating arm 47 and the spring box 2
2 is also oscillatedly displaced, for example, to the position shown by the imaginary line. In this case, the spring box 22 is virtually completely covered by the cover housing 1.
8, even if the cover housing 18
Even if the spring box 22 is exposed to a relatively high temperature or the heat capacity of the cover housing 18 is large and the cover housing 18 is relatively difficult to cool, the spring box 22 can be easily cooled down in a short time.

When tightening is performed by the tightening mechanism 1b, the operation arm 47
A force is applied to the operating arm 47 so as to rotationally displace it in the J1 direction around the axis 49a of the shaft 49. Operation arm 4
1 part 46 is connected to the end part 44 of the connecting arm 43 by the shaft 45, so at this time, the part 46 of the operating arm 47
The axis 45a of the shaft 45 is rotated in the G2 direction around the axis 41a of the shaft 41, and the connecting shaft 49 between the operating arm 47 and the spring box 22 and the spring box 22 are swung approximately in the G2 direction.

As the operating arm 47 rotates in the J1 direction, the spring box 22 contacts the bottom surface 51 of the flange section 20 with the top surface 26a of the pressing section 26, and one side 52 of the main body 24 of the spring box 22 contacts the concave portion of the cover housing 18. When the spring box 22 contacts the side surface 53 and the other side surface 56 of the main body 24 contacts the other side surface 55 of the concave portion of the cover housing 18, the swinging and positioning of the spring box 22 in the G2 direction is completed. Note that in order to self-lock the tightening mechanism 1b by the spring 50 in the spring box 22, the axis 4 of the shaft 45 is
Rotate the operating arm 47 in the J1 direction until 5a is located in the G2 direction (around the shaft 41) from the extension @57 of the line connecting the axis 41a of the shaft 41 and the axis 49a of the shaft 49. Bye. This means that the axis 45a is the axis 41a, 49
When the pressing part 26 of the spring box 22 is located in a straight line with a
When compared with bolt tightening, the pressing force of the flange portion 20 in the C direction, in other words, the surface pressure between the surfaces 27 and 28 is maximized, and the tightening operation can be performed easily and in a short time.

When using the slide gate device 2 of the preferred embodiment of the present invention configured as described above for controlling the flow rate of molten steel,
The sliding plate 1 is moved by displacing the moving plate 11 in directions A and B.
The discharge of molten steel is stopped by completely closing the hole 9 of the fixed platen 10 with the upper surface 27 of the main body part 13 of the slide plate 11.
to another predetermined position in the A and B directions, and the sliding plate 11
The cylindrical hole 58 of the main body 13 and the cylindrical hole 9 of the fixed platen 10
The holes 8 of the nozzle 7, the holes 9 of the upper fixed plate 10, and the holes 58 of the sliding plate 11 have a flow rate defined by the size of the overlap in the vertical direction.
and the molten steel flows out through the hole 60 of the lower nozzle 59.

During this molten steel discharge control, not only the bottom 4 of the tundish 3 but also the fixed plate 10, sliding plate 11, nozzle 59, etc. of the slide gate device 2 become quite high temperature, and the base housing 5 becomes heated to several hundred degrees. Not only will the temperature be high, but the cover housing 18 will also be at a fairly high temperature.

In the slide gate device 2 shown in FIG. 1, the tightening mechanism 1a
, Ib is provided below and relatively far away from the tundish 3 and on the side away from the molten steel passage 9,58,59, so the temperature rise of the tightening mechanisms 1a, 1b is relatively suppressed, but the tightening Attaching mechanism 1a, Ib, especially tightening mechanism 1a
, Ib's spring boxes 21, 22 are difficult to avoid being heated through the cover housing 18.

Therefore, it is necessary to repeatedly maintain and inspect the spring boxes 21 and 22 in a relatively short period of time, but in the slide gate device 2 shown in FIG. Not only can the spring box 21.22 be cooled independently of the cover housing 18, even if the cover housing 18 is difficult to cool down because the spring box 21.22 is completely separated from the cover housing 18 when released. , the spring boxes 21.22 can be taken out to the left and right by the arms 32.43 etc. to a distance from the housing 18.5 to the extent that heat conduction from the cover housing 18, the base housing 5 etc. can be practically ignored. box 2
1.22 can be cooled in a short time, and the spring box 21.22 can be cooled without removing the spring box 21.22.
Since the spring box of the tightening mechanism 1 can be completely separated from the cover housing 18 in the maintenance/inspection state of 22, the cover housing 18 can be easily handled when replacing the sliding plate body 13 and the like. Therefore, maintenance and maintenance of the spring box of the tightening mechanism 1
Inspection, replacement of the slide plate main body 13, etc. can be easily performed in parallel.

FIG. 2 shows a slide gate device 61 according to a second preferred embodiment of the present invention in a cross section similar to tii 12 in FIG. In the slide gate device 61 shown in FIG. 2, the same reference numerals are given to the same members as those in the device 2 shown in FIG.

In the slide gate device 61, similar tightening mechanisms 6 are provided on the left and right sides.
2.63 is provided.

The left tightening mechanism 62 has one end 64 attached to the lower end 29 of one side of the base housing 5 via a shaft 30 so as to be rotatable in the D direction.
and a dogleg-shaped connecting arm 65 connected by.

A main body portion 68 is connected to the other end 66 of the connecting arm 65 via a shaft 67 so as to be rotatable in the direction, and is biased in the direction relative to the main body portion 68 by a spring 69 in the main body portion 68. The spring box 74 presses the spherical part γ3 of the protruding part 72 formed at one end of the cover housing 18 upward (in the C direction) with the partially spherical recess 71 of the pressing part 70, and the main body of the spring box 74. operating arm 75 fixed to section 68;
It consists of. Here, the toggle mechanism includes a connecting arm 65,
The spring box 74 includes a shaft 67 and a spring box main body 68a between the spherical part 73, and is part of the toggle mechanism.

The right-side tightening mechanism 63 has one end 76 attached to the lower end 40 of the other side of the base housing 5 via a shaft 41 so as to be rotatable in the C direction.
The main body part 80 is connected to the other end 78 of the connecting arm 77 via a shaft 79 so as to be rotatable in the M direction. A partially spherical concave portion 8 of a pressing portion 81 biased in the N direction with respect to the main body portion 80 by a coil spring #
2, a spring box 85 presses upward (in the C direction) the spherical part 84 of the protruding part 83 formed at the other end of the cover housing 18, and an operating arm fixed to the main body part 80 of the spring box 85. It consists of 86. Here, the toggle mechanism includes a connecting arm 77, a spring box main body part 80a of a shaft 79 and a spherical part 84111, and the spring box 85 is a part of the toggle mechanism.

In the prone position, each member assumes a position as shown by the imaginary line (two-dot chain line) in FIG. That is, at this time, the connecting arm 77 is at its operating position ζ surface pressure setting position @ shown by the solid line in FIG.
) in the G1 direction, especially the spring box 85
is separated from the cover housing 18 so as to be away from the base housing 5 and the cover housing 18, so that it can be easily cooled down in a short time and its maintenance and inspection can be performed easily.

On the other hand, when setting the tightening mechanism 63 of the slide gate device 3161 from the released state to the tightened state, the operating arm 86
By applying a force to the operating arm 86 so as to rotate the spring box body 80 in the M1 direction around the axis 79a of the shaft 79, the spring box main body 80 is rotated along with the operating arm 86 in the M1 direction around the axis 79a of the shaft 79t. The axis 7 of a shaft 79 to which the end 78 of the connecting arm 17 is connected is dynamically displaced.
9a is rotationally displaced around the axis 41a of the shaft 41 in the G2 direction.

The recess 82 of the pressing part 81 abuts the spherical protrusion 84 of the cover housing 18, and the arcuate recess 8 of the dogleg-shaped arm 77
7 comes into contact with the side part 88 of the spherical protrusion 84, the spring box 8
The G2 direction displacement of No. 5 is completed. At this time, as shown in FIG. 2, the pressing part 81 is formed such that the upwardly projecting end 89 of the suppressing part 81 contacts the lower surface 90 of the projecting part 83 of the cover housing 18 once.

Note that when the tightening mechanism 63 is set at the position indicated by the solid line in FIG. 2, the tightening mechanism 63 is not only not moved in the G2 direction as described above, but also cannot be returned to the G1 direction by a small external force. , it will be in a self-locked state at the position shown. In the case of the setting position shown by the symbol - in Fig. 2, this means that the axis 7
This is because the axial center 79a of 9 is smaller in the G2 direction (around the shaft 41) than the extension line 91 of the line connecting the axial center 41a of the shaft 41 and the center 84a of the sphere of the spherical portion 84.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional explanatory diagram of a slide gate device for controlling molten steel discharge using the tightening mechanism of the first preferred embodiment of the present invention, and FIG. FIG. 2 is a cross-sectional explanatory view similar to FIG. 1 of the slide gate device for controlling molten steel discharge. 1, la, lb, 62.63...Tightening mechanism, 2.61...Slide gate device, 5...
...Base housing, 9...Fixed plate, 1
1...Sliding plate, 21, 22.74.85...
...Spring box, 25, 2G, 70.81...
Suppression part of spring box, 27...Top surface of sliding plate, 28.
...Fixed plate bottom surface, 31.33, 42, 44, 64
, 66.76.78...Arm end, 32.4
3,65.77...Arm.

Claims (1)

[Claims] In order to bring the upper surface of the sliding plate into pressure contact with the lower surface of the fixed plate of a slide gate device for controlling discharge of molten metal, the base housing that fixedly supports the fixed plate and the sliding plate are slid together. A tightening mechanism consisting of a toggle mechanism and a spring mechanism provided between a base housing that supports the toggle mechanism in a dynamically displaceable manner, and the longer arm of the pair of arms constituting the toggle mechanism is connected to the base at one end. The spring mechanism is rotatably connected to the housing, one end of the spring mechanism can be moved toward and away from the cover housing, and the other spring mechanism is elastically connected to the one end of the spring mechanism by the spring of the spring mechanism. The end side is configured such that the one end side of the spring mechanism is separated from the cover housing when the longer arm is in a first rotational position, and when the longer arm is in a second rotational position. a slide gate for controlling discharge of molten metal connected to the other end of the long arm so that the one end of the spring mechanism is pressed against the cover housing so as to press the top surface of the sliding plate against the bottom surface of the fixed plate; Device tightening mechanism.