JPH0623521A - Sliding nozzle device for molten metal vessel and device for exchanging this refractory - Google Patents

Abstract

PURPOSE:To enable fitting/separating work regardless of the skillness of a worker by connecting a head for exchange and a truck with universal type one point supporting mechanism and arranging fitting guide enabling connection/ separation with a receiving guide in a molten metal vessel to the head for exchange. CONSTITUTION:The head for exchange and the molten metal vessel 50 are preliminarily positioned. The fitting guide 13 in the head for exchange is advanced toward the receiving guide 52 in the molten metal vessel 50. Even if the positioning is precisely executed, as tapered part of the receiving guide 52 has large inclining angle, the tip part of the fitting guide 13 is received with this guide. Load caused by shifting is detected, and by shifting a base 8, the precise positioning is executed. Even if the molten metal vessel 50 is swung, this can be adjusted with a universal supporting part 8c. By working the clamp cylinder 8d, a sliding nozzle device is held and the removing work is executed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is for replacing work of a sliding nozzle device provided in a molten metal container such as a tundish for making steel and a ladle, and for replacing only refractory materials such as nozzle bricks and plate bricks. Regarding the device.

[0002]

2. Description of the Related Art A ladle, a tundish or the like used in steelmaking is equipped with a sliding nozzle device for quickly opening and closing a flow path of molten metal. In the refractory for sliding nozzles in this apparatus, the flow path wall inside is melted and damaged each time tapping occurs, so it is necessary to replace it periodically, and a dedicated replacement device is used for each.

When the sliding nozzle device is replaced by the replacement device, the entire device is removed from the molten metal container together with the melted sliding nozzle refractory, and a repairing sliding nozzle refractory and the device are newly mounted. For such work, it is necessary to transport the sliding nozzle refractory and equipment from the work place for repair to the mounting position on the molten metal container, and the replacement equipment is generally mounted on a traveling carriage. It has a simple structure.

When the sliding nozzle device is attached to and detached from the molten metal container, positioning between the molten metal container and the exchange device is required. In this case, the dolly of the exchanging device travels on the track and is stopped at a predetermined position, but positioning of the two is likely to be quite difficult due to an installation error of the molten metal container itself, a stop error of the dolly and the like.

[0005]

In order to position the exchange device and the molten metal container, for example, the position and orientation of the molten metal container are detected by a sensor or the like, and the position of the exchange device is controlled based on the detection result. This allows some positioning.

However, since the molten metal container is large and the sliding nozzle device for handling is also large and heavy, a highly complicated control system is required to perform positioning with high accuracy, and there is an obstacle in terms of equipment cost. Besides, it is not practical from the viewpoint of maintenance and inspection. For this reason, conventionally, while the operator visually confirms the positioning of the replacement device with respect to the molten metal container, the clamp work of the replacement device and the sliding nozzle device are joined.

In the work visually confirmed by the operator, it is necessary to move the exchange device according to the position of the molten metal container, and the quality of the positioning is determined depending on this operation.
Therefore, the replacement work greatly depends on the skill of the operator,
If the skill level is low, the work time tends to be long. Therefore, the working time varies depending on the operator, and if the replacement device and the sliding nozzle device are clamped to each other while their positions and postures are not appropriate, the members may be damaged.

Although the posture of the exchanging device itself is properly maintained by the rail of the working floor, the bottom of the molten metal container facing the exchanging device may be twisted with respect to the working axis of the exchanging device. For example, in a posture in which the axis of the molten metal container intersects the working axis, the bottom of the molten metal container facing the exchange device becomes a twisted surface with respect to the working axis. For this reason, if the member of the exchanging device moves only in the axial direction of the molten metal container, the sliding nozzle device, the refractory, and the like cannot be sufficiently joined or separated from the member of the exchanging device. Therefore, even when such twisting is included, visual inspection by the operator is required, and the work is more complicated and the working time becomes longer.

As described above, in the work of replacing the sliding nozzle device of the molten metal container and its refractory material, it is necessary to accurately position the replacement device, and this work is carried out by relying on the visual confirmation of the operator. There was a limit to the reduction of work time.

The problem to be solved in the present invention is that even if the molten metal container and the exchanging device are misaligned, they can be accurately positioned by absorbing the misalignment, and the various types can be surely achieved in a short time regardless of the skill of the operator. The purpose is to be able to exchange work.

[0011]

SUMMARY OF THE INVENTION The present invention is a sliding nozzle device for a molten metal container and / or an exchange device for attaching and detaching a refractory material related to the sliding nozzle device, the sliding device being mounted on a pedestal or a carriage. A head for replacing the nozzle device and a head for attaching / detaching the refractory are provided, and the head and the carriage are connected by a universal one-point supporting mechanism, and each head is positioned on the molten metal container side. A mounting guide that can be coupled / disengaged is provided to the receiving guide provided as described above, and a restraint mechanism that restrains and holds the posture of the head is arranged between each head and the gantry or the carriage.

It is also possible to interpose a two-dimensional floating mechanism substantially in the vertical plane between the one-point support mechanism of the head and the gantry or the carriage.

[0013]

For example, when the replacement head is mounted on the carriage and the sliding nozzle device of the molten metal container is removed by the replacement head, the carriage is set close to the molten metal container and the head is set to face the sliding nozzle device. Then, when the carriage is further approached, the mounting guide of the head enters into the receiving guide on the molten metal container side, and at this time, the posture of the mounting guide is restrained by the molten metal container. Therefore, since the head is connected to the carriage by the universal one-point support mechanism, the head is positioned while changing its posture with respect to the receiving guide serving as a fixed point.

Further, since the head is connected to the trolley by a restraint mechanism, if the restraint mechanism is a hydraulic cylinder having a hydraulic circuit capable of responding to an external load, for example, the weight of the head and the nozzles to be mounted will be used. The height and posture of the head itself can be appropriately maintained according to the weight.
Then, when the external force acting between the mounting guide and the receiving guide is received, the operating hydraulic pressure is automatically changed.For example, if an electromagnetic proportional control valve is incorporated in the hydraulic circuit, interference between the guides should be avoided. The mounting guide comes into the receiving guide, and positioning by scanning is possible.

If a two-dimensional floating mechanism in a substantially vertical plane is incorporated between the one-point support mechanism and the carriage,
In addition to changing the posture of the head itself by turning and rocking, it is possible to perform a floating operation at that position.

[0016]

FIG. 1 is an elevational view showing the arrangement of a changing apparatus of the present invention for a molten metal container such as a ladle or a tundish during operation, and FIG. 2 is a schematic plan view thereof.

The molten metal container 50 can be turned upside down by a trunnion shaft 50a provided on its side surface, and a sliding nozzle device 51 is incorporated at the bottom thereof. The sliding nozzle device 51 is of a cassette type and is firmly fixed and supported by the molten metal container 50 by, for example, a cotter mechanism.

As shown in FIG. 1, the molten metal container 50 is rotated around its trunnion shaft 50a so that the sliding nozzle device 51 is oriented laterally, and the exchanging device 1 is made to stand by so as to face the sliding nozzle device 51. Replace the old and new sliding nozzle devices.

The exchanging device 1 is based on a trolley 2 which is freely moved by an operation from a driver's seat 2a, and on which a swivel 3 having a rotary shaft in the vertical direction is arranged. A set of exchange heads 4 and 5 is arranged around the swivel base 3 at positions facing each other in the radial direction, and a direction having an angle difference of 90 degrees with respect to the directions of these exchange heads 4 and 5. Is equipped with an upper nozzle mounting head 6 and a porous plug mounting head 7.

The swivel base 3 swivels according to the contents of the work performed on the molten metal container 50, and sets the respective heads 4 to 7 so as to face the work surface. That is, in the work of removing the sliding nozzle device 51 from the molten metal container 50 and replacing it with a new one, the exchange head 4 on the right side in the drawing is positioned so as to face the sliding nozzle device 51, and the other exchange head 5 is provided with a new sliding nozzle device. The nozzles are replaced by rotating the swivel base 3 counterclockwise in FIG.

FIG. 3 is a side view showing an essential part of the exchange head 4,
FIG. 4 is a plan view of the main part. The exchange head 4 shown in FIG. 3 corresponds to the rear view of that shown in FIG.

The exchange head 4 has a base 8 for clamping and detaching the cassette of the sliding nozzle device connected to the side surface of the swivel base 3 by a floating mechanism. This floating mechanism is composed of two first frames 9 and two second frames arranged between the swivel base 3 and the base 8.
The frame 8 and the base 10 allow the base 8 to be two-dimensionally floated in a substantially vertical plane.

The first frame 9 is a plate-shaped structure having a high rigidity, and two guides 3 a provided on the side surface of the swivel base 3.
Is connected to the swivel base 3 via a sliding seat 9a. Each of these guides 3a has an axial posture substantially horizontal, and the first frame 9 is movable in a horizontal direction orthogonal to the axis of the swivel base 3.

On the front surface of the first frame 9, two guides 9b having an axis orthogonal to the guide 3a of the swivel base 3 are provided, and the second frame 10 is connected to these guides 9b via a sliding seat 10a. To do. As a result, the second frame 10
Are movable in the vertical direction with respect to the first frame 9.
Therefore, the second frame 10 can move in the horizontal and vertical directions with respect to the stationary revolving base 3, and its position can be changed two-dimensionally within the vertical plane.

The first frame 9 and the second frame 1
The load of 0 is applied to the sliding nozzle device and other refractories held on the base 8. Therefore, for example, the first frame 9 can be held by connecting the swivel base 3 and the first frame 9 by a screw gear mechanism or the like driven by a hydraulic motor to form a hydraulic circuit that controls the operating hydraulic pressure according to the load. To Further, between the first frame 9 and the second frame 10, a hydraulic cylinder in which the cylinder is connected to the first frame 9 side is arranged in a vertical posture, and the hydraulic circuit thereof allows the second frame 10 to handle the load. Can be held in place.

As described above, by incorporating the hydraulic motor and the hydraulic cylinder as the supporting members of the first and second frames 9 and 10, it is possible to perform the floating operation within the vertical plane and the holding in the fixed position. Therefore, it is possible to perform floating when aligning with the molten metal container 50 and to carry the sliding nozzle device 51 and the like.

In the hydraulic circuit such as a hydraulic cylinder that supports the first and second frames 9 and 10, these first and second frames are provided.
The second frame 9 and 10 is provided with a system capable of setting the operating hydraulic pressure so as to maintain its position according to the weight of itself and the load of external force. For example, with respect to the hydraulic cylinder that supports the second frame 10 in the vertical direction, it is possible to control the operating hydraulic pressure by the electromagnetic proportional control valve, and the second frame 10 can be moved so as to absorb the external force load. The hydraulic oil is controlled to enable the floating operation of the second frame 10.

The base 8 has a side shape having a pair of arms 8a and 8b projecting forward at both upper and lower ends thereof, and a central portion of its main body is incorporated into a support shaft 10b projecting from the second frame 10 and the base 8 side. It is connected to the second frame 10 by the aspherical joint 8c. In addition, the support shaft 10b and the spherical joint 8c allow the base 8 to freely rotate about the axis of the support shaft 10b with respect to the stationary second frame 10 and also to intersect the axis of the support shaft 10b. You can move around freely even in the direction in which the body is twisted to the posture of doing.

Note that FIG. 3 shows the state in which the front side of the base 8 is in the most downward position, and in FIG.
The axis and the core of the base 8 show the coaxial posture.

The arms 8a and 8b of the base 8 have a bifurcated shape as shown in FIG. 3, and a clamp cylinder 8d is provided at each tip. Further, screw cotters 8e for attaching / detaching / connecting the sliding nozzle device 51 to / from the molten metal container 50 by a cotter mechanism are provided at the central portions of the upper and lower ends of the base 8.

The upper ends of the second frame 10 and the base 8 are connected by two hydraulic cylinders 11 and 12, respectively. These hydraulic cylinders 11 and 12 have their base ends connected to the second frame 10 as shown in FIG.
The rods 11a and 12a are connected to the base 8. When the second frame 10 and the base 8 in the state shown in FIG. 4 are coaxial with each other, the axes of the hydraulic cylinders 11 and 12 are arranged so as to be included in the same horizontal plane and intersect each other.

A bracket 1 is attached to the upper end of the second frame 10.
0c and 10d are started up, and the base ends of the hydraulic cylinders 11 and 12 are connected by the spherical bushing accommodated therein. As a result, each of the hydraulic cylinders 11 and 12 is connected to the second frame 10 side and the base 8 side by a universal joint, and the posture of the axis can be freely changed in the twisting direction and the posture. Also,
Flanges 8f and 8g are erected on the upper end of the base 8 and the bifurcated connector 1 provided at the tips of the rods 11a and 12a.
1b and 12b are connected to these flanges 8f and 8g. Similarly, spherical bushings are also incorporated in the connectors 11b and 12b, and the rods 11a and 12a are connected to the base 8 in a universal manner, whereby the postures of the rods 11a and 12a with respect to the base 8 are made variable.

With the connecting structure of the hydraulic cylinders 11 and 12 and the rods 11a and 12a to the second frame 10 and the base 8, the relative movement between the second frame 10 and the base 8 is followed. The postures of the hydraulic cylinders 11 and 12 can be changed. In addition, since the base 8 is connected to the second frame 10 at a point substantially in the center on the back side thereof by the universal type spherical joint 8c, the base 8 is connected to the first and second frames 9,1.
Instead of the two-dimensional floating by 0, the twisting operation with the spherical joint 8c as the center of rotation becomes possible. Therefore, the base 8 which is located at the most distal end side and is used for handling the nozzles and other members is capable of not only a simple floating operation in two dimensions but also a three-dimensional posture change by the spherical joint 8c. .

On the other hand, the sliding nozzle device 51 of the molten metal container 50 has two mounting guides 13, 1 of the exchanging device 1.
Receiving guides 52 and 53 for receiving 4 are provided. As shown in FIGS. 3 and 4, these receiving guides 52, 53 have tapered portions 52 with wider sides for receiving the mounting guides 13, 14.
a, 53a, and the inner sides thereof are formed as holding holes 52b, 53b into which the mounting guides 13, 14 fit tightly.

Receiving guides 52, 5 provided on the molten metal container 50
3 and the mounting guides 13 and 14 fitted therein are used for floating when positioning the exchange device 1 with respect to the molten metal container 50. Therefore, the positional relationship between the receiving guides 52 and 53 and the mounting guide 1
The positional relationship between the three and the four is the same, and when they are aligned, the exchange device 1 is correctly positioned in the molten metal container 50.

The other exchange head 5 has exactly the same construction as described above, and the sliding nozzle device 51 is replaced by the molten metal container 5.
When attaching / detaching to / from 0, the positional deviation can be absorbed by using the floating mechanism.

FIG. 7 is a side view showing the outline of the porous plug mounting head 7.

The porous plug mounting head 7 has a floating mechanism similar to the replacement heads 4 and 5 by a floating mechanism.
Connected to the first and second frames 15, 16
It can be floated horizontally and vertically. The connection structure between the first frame 15 and the swivel base 3 and the connection structure between the second frame 16 and the first frame 15 are exactly the same as the structure of the exchange head 4 described above.

On the front surface of the second frame 16, the spherical joint 1
The holder 17 is integrally connected by 6a, and
The upper ends of the frame 16 and the holder 17 are connected by two hydraulic cylinders 18. The arrangement position and posture of the hydraulic cylinder 18 are the same as those of the exchange head 4 shown in FIG.

The holder 17 is a porous plug mounting device 1
9, a head 19 for externally inserting and holding a porous plug (not shown) at the tip of the mounting device 19.
a is attached. The head 19a has a structure in which a porous plug is fitted into the upper nozzle, and then the porous plug is left behind and pulled out.

The holder 17 has two mounting guides 17a, 1 which are inserted into the receiving guides 52, 53 of the molten metal container 50.
7b is provided. The mounting structure of these mounting guides 17a and 17b to the holder 17 is exactly the same as that of the mounting guides 13 and 14 of the exchange head 4 described in FIG. 4, and is directed toward the tip side by a coil spring (not shown). It has a biased structure. The mounting guides 17a and 17b
The positional relationship between the mounting guide 13 of the replacement head 4,
14 is the same as the relationship of 14 and the receiving guide 5 of the molten metal container 50.
Of course, it is possible to insert it in 2, 53.

Further, the upper nozzle mounting head 6 also has a structure similar to that of the porous plug mounting head 7. The upper nozzle is set on the mounting head provided at the tip of the mounting device, and the upper nozzle is attached to and detached from the sliding nozzle device 51. With the function to do.

Here, new ones are set in the upper nozzle mounting head 6 and the porous plug mounting head 7 when the upper nozzle and the porous plug are replaced. Then, the work of mounting or removing the nozzle or the like on the molten metal container 50 can be performed by the exchanging device of the present invention as described later. However, for example, when a porous plug or an upper nozzle is inserted into the tuyere of the molten metal container 50, it is necessary to apply a joint material to the peripheral surface of the molten metal container 50, which requires only manual labor.

On the other hand, if the joint material is prepared in advance so that it can be easily handled, it is possible to use the robot to cover the outer surface of the porous plug or nozzle set in the exchange device. Is. For example, as shown in FIG. 8, a robot 20 is prepared and an umbrella-shaped suction tool 20 a capable of sucking a hollow frustoconical joint material 22 placed on a stock container 21 is installed in the robot 20.
To be installed on the arm. The joint material 22 can be manufactured by winding a mortar sheet material. Since the cross-section thereof has an umbrella shape as shown in FIG. 9, if it is stacked vertically, its bulk becomes smaller. You can easily handle it by simply covering it from above.

If the robot 20 and the joint material 22 are provided, the arm of the robot 20 is operated and the vacuum pump 20b is operated to operate the joint material 2 with the suction tool 20a.
2 can be sucked and directly fitted to the nozzle of each head of the exchange device or the outer peripheral surface of the porous plug. Not only the frusto-conical joint material 22 but also the joint material for the dowel of the upper nozzle or the like having a different shape, if the suction tool according to the shape is provided in the arm of the robot 20. , Similar work is possible.

If the robot 20 is independently installed in a work place away from the molten metal container 50, the joint material 22 can be covered with a porous plug or the like in advance in the work place. Alternatively, if the robot 20 is placed on the dolly 2 as shown in FIG. 2, the joint material 22 can be pulled out from the stock container 21 and placed on the porous plug of the porous plug mounting head 7 as it is.

As described above, by providing the exchange device 1 with the robot 20 for setting the joint material, it is not necessary for a person to work these joint materials near the molten metal container 50 at the work place, and the joint material is not required. It can be automated, including the installation of.

In the above structure, the operation of the exchanging device 1 when the sliding nozzle device 51 is removed from the molten metal container 50 by the exchanging head 4 is as follows. Here, first, in the state shown in FIG. 4, the case where the axis of the swivel base 3 and the axes of the receiving guides 52 and 53 are orthogonal to each other and the floating operation is performed only in the vertical plane will be described.

The trolley 2 is run from the work place to melt the molten metal container 5
It is stopped before 0, and the exchange head 4 is placed in a posture facing the sliding nozzle device 51 as shown in FIGS. 1 and 2. At this time, the carriage 2 and the molten metal container 50 are provisionally positioned, and the carriage 2 is further advanced to the molten metal container 50 side from the position shown in the figure.

By the movement of the carriage 2, the two mounting guides 13 and 14 projecting forward from the exchange head 4 advance toward the receiving guides 52 and 53 of the molten metal container 50. Even if the position of the replacement head 4 is not correctly positioned with respect to the molten metal container 50, the tapered portions 52a, 53a of the receiving guides 52, 53 are widely opened, so that the tip ends of the mounting guides 13, 14 are tapered. Parts 52a, 53a
Be accepted by.

On the other hand, the first frame 9 and the second frame 10 of the exchange head 4 operate by the pressure of the hydraulic oil of the hydraulic motor or hydraulic cylinder incorporated to hold them. At this time, it is needless to say that the initial operating oil pressure should be commensurate with the weight of the replacement head 4 itself and the weight of the nozzles mounted on it, and if this setting is made by incorporating an electromagnetic proportional control valve in the hydraulic circuit. When an external force equal to or greater than the load corresponding to the applied hydraulic pressure is applied, the replacement head 4 can be traced so as to absorb the external force. Therefore, the first and second frames 9 and 10 can follow the external force when they are loaded with external force, and the two guide rods 13 and 14 of the base 8 connected to the second frame 10 move two-dimensionally in a substantially vertical plane. It will be.

When the carriage 2 is further advanced by such movements of the mounting guides 13 and 14, the receiving guides 52 and
The mounting guide 1 for the taper portions 52a, 53a of 53
The floating mechanisms 3 and 14 are inserted so as to follow. Finally, as shown in FIG. 4, the mounting guides 13 and 14 are fitted into the holding holes 52b and 53b of the receiving guides 52 and 53 of the molten metal container 50, respectively, whereby the exchange head 4 for the molten metal container 50 is inserted. Is positioned.

In this positioning, the two mounting guides 1
The two points are constrained by 3 and 14, and the mounting guides 13 and 14 are arranged at point-symmetrical positions with respect to the core of the exchange head 4, so that the posture of the exchange head 4 around the core is also relative to the molten metal container 50. Can be positioned correctly. Therefore, even if the position of the carriage 2 cannot be correctly positioned with respect to the molten metal container 50, the exchange head 4 for the swivel base 3
This floating mechanism allows the exchange head 4 to be accurately positioned with respect to the sliding nozzle device 51.

After the above positioning, the positions of the first and second frames 9 and 10 are held at fixed positions by the hydraulic motor and the hydraulic cylinder. By this operation, the first and second frames 9 and 10 are locked to the swivel base 3, and the displacement of the base 8 is prevented against the weight load of the sliding nozzle device 51 to be removed. Then, the clamp cylinder 8d is operated to hold the sliding nozzle device 51. After that, when the carriage 2 is moved backward and transported to the work place, the work of removing the sliding nozzle device 51 is completed.

Here, when the exchanging device 1 is set to its working position, the posture of the bottom of the molten metal container 50 is set to the exchanging heads 4 and 5.
Often, it has a twisted inclination that is not orthogonal to the advancing direction, and has a posture of rotating around the core of the molten metal container 50. This will be described with reference to FIG.

The molten metal container 50 is rotated at the time of replacement work by using a trunnion shaft 50a supported by a crane shaft or the like so that its bottom surface 50b faces the replacement device 1 side. Then, the replacing device 1 performs a predetermined operation on the sliding nozzle device 51 provided on the bottom surface 50b.

However, as shown in FIG. 10A, when the rotation angle around the trunnion shaft 50a is large or small, the bottom surface 50b has a vertical inclination. Further, as shown in (b) of the figure, the trunnion shaft 50
If the axis of a is in a posture not orthogonal to the advancing direction of the exchange heads 4 and 5, the bottom surface 50b is inclined in the width direction when viewed from the exchange heads 4 and 5.

As described above, the bottom surface 50b of the molten metal container 50 is not always orthogonal to the advancing direction of the exchange heads 4 and 5, but may be inclined in the vertical and width directions. Then, when the inclinations in these directions are combined, the bottom surface 50b takes a twisted posture with respect to the advancing direction of the exchange heads 4 and 5.

Further, as shown in (c) of the same figure, it is quite conceivable that the axis of the trunnion shaft 50a is not horizontal and tilts to the right or the left.

Therefore, in the replacement work, the molten metal container 50
The bottom surface 50b of the receiving head 5 is twisted in the advancing direction of the replacement heads 4 and 5, or the position is changed around the core.
Similarly, the directions of the axes of the Nos. 2 and 53 also change in various ways.

Since the base 8 is connected to the second frame 10 by the spherical joint 8c, the posture of the molten metal container 50 can be changed three-dimensionally. That is, as shown in FIG. 5, the base 8 can swivel around the spherical joint 8c as a rotation center, and depending on the expansion and contraction amounts of the rods 11a and 11b of the two hydraulic cylinders 11 and 12,
The orientation of the base 8 also changes as shown in FIG. To change the orientation of the base 8, the hydraulic cylinders 11 and 12 allow the second frame 10 and the base 8 to have a degree of freedom in connection fulcrums, and both hydraulic cylinders 11 and 12 are changed.
It was made possible by each other's posture.

In FIG. 3, the bottom surface 50b of the molten metal container 50 is tilted with respect to the rotation axis of the swivel base 3, and when the replacement head 4 is advanced, the first and second parts described above are used.
Floating in the vertical plane by the frames 9 and 10 and a posture changing motion of the base 8 itself are executed. In this case, the hydraulic pressures of the hydraulic oils of the hydraulic cylinders 11 and 12 are controlled according to the load of the external force, and the base 8 is moved by following the mounting guides 13 and 14 into the receiving guides 52 and 53.
Floating operation. As a result, the base 8 is set on the bottom surface 50b of the molten metal container 50 in the correct posture,
It becomes possible to hold the sliding nozzle 51.

Further, as shown in FIG. 5, since the base 8 is rotatable around the spherical joint 8c, it can be rotated from the posture of the broken line to the maximum clockwise rotation angle shown by the solid line in the figure. Even in this case, the two hydraulic cylinders 11, 1
By controlling the operating hydraulic pressure of 2 according to the external force, the movement of the base 8 is not interfered. Therefore, even if the axis of the trunnion shaft 50a of the molten metal container 50 is not horizontal and the positions of the receiving guides 52, 53 are vertically displaced, when the mounting guides 13, 14 enter these receiving guides 52, 53, The attitude of the base 8 can be finally adjusted to the bottom surface 50b by the dimensional floating motion and the attitude changing motion of the base 8 itself.

As described above, the base 8 is not only two-dimensionally floated by the first and second frames 9 and 10 even when the posture of the bottom surface 50b of the molten metal container 50 is changed, but also the bottom surface 50b is twisted or rotated. It is possible to change the posture of the base 8 with respect to the movement. Therefore, the base 8 can be correctly set on the molten metal container 50 side even under the condition that the mutual positions and postures of the exchange device 1 and the bottom surface 50b of the molten metal container 50 do not match.

After the base 8 is positioned with respect to the molten metal container 50 by the above floating operation, the sliding nozzle device 51 is held by the clamp cylinder 8d, and at the same time, the hydraulic pressure is applied to the hydraulic cylinders 11 and 12 and held. Try to receive the weight. Then, after holding the sliding nozzle device 51, the carriage 2 is retracted from the molten metal container 50 and conveyed to the work place.

If a new sliding nozzle device is set on the other exchange head 5, the swivel base 3 can be set to one.
By turning 80 degrees, a new sliding nozzle device can be attached to the molten metal container 50 by the exchange head 5. Even in this case, as in the case of the replacement head 4, the floating mechanism for the receiving guides 52 and 53 allows the user to easily perform the work without the operator's visual inspection.

Further, if the upper nozzle and the porous plug are set in advance in the upper nozzle mounting head 6 and the porous plug mounting head 7, respectively, the sliding nozzle device 51 is removed from the replacement head 4 and a new sliding nozzle is replaced by the other replacement head 6. The required work can be performed while the swivel base 3 is sequentially rotated during the mounting of the device.

In the embodiment, rod-shaped mounting guides 13, 14, 17a, 17b are provided on the side of the exchanging device, and receiving guides 52, 53 are provided on the side of the molten metal container 50. A member protruding in the shape of a rod may be provided in the molten metal container 50, and a sleeve-shaped receiving guide into which this member enters may be provided on the exchange device side. Also, trolley 2
When a fixed mount is used instead of, the mount may be provided with a movable base and each head may be mounted thereon.

[0069]

According to the present invention, when the head for exchanging the sliding nozzle device or the head for attaching / detaching the refractory material is set at the working position, the turning or swinging of the head itself and the floating operation between the head and the truck are utilized. it can. Therefore, it is not necessary to position the carriage to the molten metal container accurately.
Exchange and detachment work can be done in a short time without being influenced by the skill of the operator. Further, since each head is free to move to some extent by turning, swinging, and floating, a large load is not applied to the constituent members of the head when the sliding nozzle device or the refractory material is attached or detached, and damage to the members can be prevented.

[Brief description of drawings]

FIG. 1 is a schematic elevational view showing a working arrangement for a molten metal container such as a ladle or a tundish of the exchange device of the present invention.

FIG. 2 is a schematic plan view of FIG.

FIG. 3 is a side view showing a main part of an exchange head.

FIG. 4 is a schematic plan view showing how the base is set when the rotation axis of the swivel and the axis of the guide sleeve are orthogonal to each other.

FIG. 5 is a front view showing a posture in which the base is rotated clockwise from the steady position to the maximum angle.

FIG. 6 is a schematic plan view of a main part showing that the posture of the base can be changed.

FIG. 7 is a side view of the porous plug mounting head.

FIG. 8 is a schematic view showing an example of handling a truncated cone-shaped joint material by a robot.

FIG. 9 is a schematic view showing a stacked joint material and a suction tool.

10A and 10B are views showing changes in the posture of the molten metal container with respect to the exchange device, wherein FIG. 10A shows an example in which the bottom surface is inclined in the vertical direction, and FIG. 10B shows the bottom surface in the width direction. An example in which the bottom surface is rotated and an example in which the bottom surface is rotated are shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 exchange device 2 carriage 3 swivel base 4 exchange head 5 exchange head 6 upper nozzle mounting head 7 porous plug mounting head 8 base 9 1st frame 10 2nd frame 11,12 hydraulic cylinders 13,14 mounting guide 15 1st frame 16th 2 frame 17 holders 17a, 17b mounting guide 18 hydraulic cylinder 19 mounting device 50 molten metal container 51 sliding nozzle device 52, 53 receiving guide

Claims (2)

[Claims] 1. A replacement device for attaching / detaching a sliding nozzle device provided in a molten metal container and / or a refractory material associated with the sliding nozzle device, wherein a replacement head for the sliding nozzle device and a replacement head for the sliding nozzle device are provided on a mount or a carriage. A head for attaching / detaching refractory is provided, the head and the carriage are connected by a universal one-point support mechanism, and each head is connected to a receiving guide provided for positioning on the molten metal container side. A sliding nozzle device for a molten metal container and a refractory replacement thereof, characterized in that a detachable mounting guide is provided, and a restraint mechanism for restraining and holding the posture of the head is arranged between each head and the pedestal or trolley. apparatus. 2. The sliding container for molten metal according to claim 1, wherein a two-dimensional floating mechanism in a substantially vertical plane is interposed between the one-point supporting mechanism of the head and the gantry or the carriage. Nozzle device and refractory replacement device therefor.