JPS6054830B2 - How to attach and detach the ladle lid - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a method for attaching and detaching a heat-insulating lid to a ladle in a progressing process, and in particular, to a method for attaching and removing a heat-insulating lid to a ladle in a progressing process, and in particular to a method for tilting and dumping the ladle after transporting the lid plate on the ladle and discharging molten steel. In this case, the cover plate is pivotally supported on the ladle, and the cover plate is automatically removed when servicing the ladle.

In the advancing process, molten steel refined in a converter or the like is received in a ladle prepared in advance and on standby, transported to a advancing location, and then poured into a mold.

In addition, a lid plate is installed on the ladle to prevent the temperature of the molten steel from decreasing, but the lid plate is installed at a specific location on the ladle after receiving the steel, and is transported to the pouring factory. At this stage, the mold is poured with the mold still mounted. The steel slag remaining in the ladle after pouring is removed by tilting the ladle, but before tilting, the lid plate must be removed in advance or the lid plate must be pivoted to the ladle. ing. FIGS. 1, 2, and 3 are schematic diagrams explaining the ladle flow, in which the prepared ladle 1 is placed on the steel receiving cart 2, and the ladle 1 is placed on the steel receiving cart 2, and the ladle 1 is placed on the steel receiving cart 2, and the ladle 1 is placed on the steel receiving cart 2, and the ladle 1 is placed on the steel receiving cart 2, and the It is transported to the steel department and received steel (Fig. 1).
The cover plate 6 is mounted at a predetermined portion.

Next, the hook 5 suspended from a traveling crane etc.
The ladle is lifted up by hooking it onto the trunnion shafts 4 formed on both sides of the ladle, and is transported to a pouring factory and poured into a mold 7 (
Figure 2). After pouring, the ladle 1 is transported to a predetermined location and then discharged. In order to discharge the slag, a pulling cable 5/a is attached to a hook part lb formed on the outer circumference of the bottom side of the ladle 1. Either the rope 5a is restrained and the rope 5a is pulled up, or the hook 5 is lowered to tilt the ladle 1 as shown in FIG. 3, and the slag is discharged into the slag ladle 8 placed directly below it. By the way, as the lid plate 6,
It is conceivable that the lid plate 6 may be set up and removed before the sludge is discharged, but since the lid plate 6 is made up of steel crosspieces and a lid plate filled with fireproof insulation material between the surrounding side frames, the weight can be reduced. A special crane is required for loading and unloading.

In addition, since these operations are difficult during suspended transportation, a pivot arm 6a is attached to one end of the lid plate 6, and a pivot arm 1a is formed in a part of the periphery of the opening side of the ladle 1. When mounting the lid plate, position them so that they match and mount them, and use the sliding of the lid plate 6 due to the tilting of the sludge to engage the pivot arm 6a with the pivot support 1a. It is configured to do so. Therefore, when the ladle 1 is tilted as shown in FIG. 3, the lid plate 6 swings about the pivot portion 1a, and the slag can be discharged with the lid plate 6 mounted. On the other hand, once the slag has been drained, the ladle is transported to a ladle repair shop for re-receiving steel, where a stopper and injection nozzle are installed, the lining brick is repaired, and various other repairs are carried out. To do this, the ladle 1 is turned sideways so that the pivot portion 1a of the lid plate 6 is positioned on the upper side as shown in FIG.

In this case, the ladle is laid down on a cart or a specially designed ladle mounting and moving device, and then the lid plate 6 is pushed up and removed. However, no special equipment has been developed for this type of removal work, and the work is carried out exclusively by maintenance shop personnel, with several people working together each time. Therefore, in order to prevent danger, reduce labor costs, and streamline the maintenance process, it is necessary to make it possible to easily attach and detach the cover plate, and to ensure that the cover plate mounted on the ladle is securely attached until the detachment work. It has come to be desired that it be detained in a ladle. The present invention has been made with these points in mind, and it is an object of the present invention to provide a lid attachment/detachment method that satisfies the above-mentioned needs.

However, the lever of the present invention is a hook that protrudes toward the outer periphery of a part of the outer periphery of the lid plate. At the same time, a locking piece is provided on each side of the hook so that the hook is restrained when the hook is moved in a direction opposite to the mounting direction of the hook, and a pair of locking pieces are provided on the side opposite to the hook. A pivoting arm is provided to constitute the lid plate, and the outer periphery of the ladle is provided with the engaging protrusion of the locking piece and! The pivot portions of the pivot arm rods are each fixed, and when mounting the cover plate, the locking piece and the pivot arm rod are respectively mounted in a non-contact state on the engagement protrusion and the pivot portion, To remove the cover plate, rotate the ladle sideways so that the hook is positioned upward, and detach the pivot arm from the pivot,
In the state in which the restraining piece is engaged, a lifting arm configured to pull up and move the cover plate is advanced and engaged with the hook of the cover plate, and while pulling up the cover plate, the lifting arm rod is configured to move the cover plate by pulling it up. The engagement is released and removed.
The present invention will be described in detail below based on an apparatus illustrated in the drawings. However, the drawings show an example of implementing the present invention, and the present invention is not limited to these illustrated examples. Even if some of the constituent devices or designs are changed, the same implementation is possible.

FIG. 5 shows the attitude of the ladle 1 after the maintenance has been completed, and in this state it is placed on the steel receiving cart 2 (FIG. 1), and preheated after being placed or placed. 6 to 14 show the structure and operation of the lid plate and attachment/detachment device for carrying out the present invention, and only a part of the ladle 1 is shown. That is, the lid plate 6 is constructed as shown in FIG. 6 (side view) and FIG. 7 (plan view), and is mounted on the ladle 1. As described above, the cover plate 6 is framed by the vertical bars and horizontal bars 9, and the fireproof heat insulating material is held by the peripheral wall 10. In addition, a suitable shingle material or a shingle material for retaining a heat insulating material is provided within the peripheral wall 10. A hook 11 is provided on a part of the outer periphery of the lid plate 6 (on the left side in the figure). The hooks 11 are formed into an arch shape by fixing the leg sides of steel bars bent in a U-shape to the rods 9, and protruding the opposite ends toward the outer periphery of the cover plate. In addition, on both sides of the hook 11 (in the vertical direction in FIG.
2 are respectively fixed, and a locking piece 13 is respectively attached to the mounting seat 12.
The shaft is supported. The locking piece 13 has a locking part 13a oriented in the opposite direction to the protruding direction of the hook 11 on the lower side thereof, and the locking piece 13 is pivoted by a pivot 13b, so that it cannot be inserted. The position is determined by inserting the pin 13c. That is, by pulling out the insertion pin 13c, the locking piece 13 is made swingable, and by inserting the pin 13c into the insertion hole 13d provided in the mounting seat 12, the locking piece 13 can be moved as shown in FIG. It can be held in position while tilted in the direction. On the other hand, on the side of the cover plate 6 opposite to the side on which the hook 11 is attached, mounting seats 14 are fixed at both ends, and a pivot arm rod 15 is attached to the tip side thereof.
A pivot shaft 1β is fixed to the tip of the pivot arm rod 15. On the other hand, protrusions 17 are fixed to the ladle 1 at positions corresponding to the locking pieces 13, and pivot parts 18 are fixed to the pivot shafts 16 of the pivot arm rods 15 at positions corresponding to each other.

The fixed positions of the protrusion 17 and the pivot portion 18 are the relative positions shown in FIGS. 6 and 7. Lid plate 6 configured in this way
When loading the ladle 1 onto the ladle 1, the lifting wires are hooked onto the hanging tools 10a fixed to the four corners of the cover plate 6, and the locking pieces 13 and the pivot The shaft 16 can be mounted in a non-contact state with the projection 17 and the pivot portion 18, respectively. If necessary, if the restraining piece 17 is mounted in an inclined state as described above, it can be mounted in a non-contact state even on a ladle where the projections 17 are fixed at irregular positions, and the lid plate can be mounted in a non-contact state. The illustrated position may be maintained prior to starting the detachment work. In the ladle 1 equipped with such a lid plate 6, when the ladle 1 is transported to the slag removal section and tilted as described above, the eighth
As shown in the figure, first it slides on the ladle opening surface of the lid plate 6, and the pivot shafts 16 are supported by the respective pivot parts 18. Further, as shown in FIG. 6, the pivot portion 18 has an inclined surface formed on its outer surface, and the top thereof forms a pivot groove 18a.
Therefore, in the tilting shown in FIG. 8, the pivot shaft 16 is restricted by the inclined surface, and the locking piece 13 is reliably placed in a position away from the protrusion 17. Next, when the slag exhaust tilting is reached, the pivot shaft 16 slides on the inclined surface of the pivot support 18 and the pivot groove 1
8a, and the cover plate 6 is suspended by the pivot shafts 16, 16. After the sludge has been removed, the ladle is returned to its original position, and the lid plate 6 is mounted thereon.The ladle is then transported to a ladle maintenance shop. On the other hand, the lid plate attachment/detachment device provided in the maintenance shop is constructed as shown in FIG. 10 (side view) and FIG. 11 (right side front view).

That is, in FIG. 10, a pair of guide rails 20, 20 made of a channel material are fixedly installed at a required part of the frame 19, which is formed long in the direction penetrating the plane of the paper, and the guide rails 2
A traveling trolley 21 is movably provided at 0 and 20. Stand brackets 22, 2 are provided on the lower surface side of the traveling trolley 21.
2 are provided and the shafts 23 are mutually pivotally supported. L-shaped arm rods 24 are freely supported inside the brackets 22 and 22 on both sides of the shaft 23, and a connecting rod for connecting both arm rods to each other is attached to the other end shaft of the arm rod 24. 25 is inserted. The connecting rod 25 connects to a piston rod 26 of an operating cylinder 26 attached to the lower surface of the traveling truck 21.
A shaft 23 is pivoted at the tip of a piston rod 28a of an operating cylinder 28, which is supported by a bracket 27 fixed to the rear end of the guide rail 20 via a beam. let Therefore, the operating cylinder 28 moves the traveling carriage 21 forward and backward along the guide rail 20 via the shaft 23, and the operating cylinder 26 uniformly swings the arm rod 24 about the shaft 23 via the connecting rod 25. At this time, axis 2
3 is the center of oscillation. Further, an engagement groove 24a is formed at the protruding end of the arm rod 24, and the groove 24a is a groove into which the hook 11 provided on the cover plate 6 is fitted. On the other hand, the ladle 1 with a lid arrives at the installation part of the attachment/detachment device configured in this way.
is placed on a suitable truck and turned over, or with the trunnion shaft 4 supported by a special moving device, it is turned over and stopped at a predetermined position. In the illustrated example, the hook 11 of the cover plate is formed on the side opposite to the pivot arm 15 side, but this is because it is considered desirable from the viewpoint of repairing the ladle 1 and organizing the cover plate 6. Therefore, the hook 11
Turn the ladle 1 so that it is positioned at the top, and then place it on its side. Therefore, the cover plate 6 slides in the opposite direction to that shown in FIG. 8, and the locking piece 13 engages with the protrusion 17 to prevent it from sliding off, and the locking portion 13a prevents it from coming off.
Further, the pivot shafts 16 of the arm rods 15 are separated from the pivot parts 18 of the ladle 1, and the cover plate 6 is supported only by the restraining pieces 13. These operations are performed at the most advanced position of the arm rod 24 in the attachment/detachment device. This is also the position where the arm rod 24 moves forward with the piston rod 26a of the actuating cylinder 26 protruding and engages the engagement groove 24a of the arm rod 24 with the hook 11. Due to the operation, the engagement groove of the arm rod 24 becomes the 12th
It engages with the hook 11 as shown in the figure. Next, when the piston rod 26a of the operating cylinder 26 is operated backward, the arm rod 24 swings and rotates counterclockwise as shown in FIG. 13, and the cover plate 6 is pulled up via the hook 11. As a result, the locking piece 13 is separated from the protrusion 17 on the ladle side, and the cover plate 6 is suspended by the arm rod 24. Then, by the operation of the operating cylinder 28, the cover plate 6 is moved as shown in FIG. It can be detached from the ladle 1. In this state, the ladle 1 can be repaired, and if necessary, the lid plate 6 can be operated in the opposite manner to the above, and the ladle 1 can be repaired again.
Alternatively, the detached lid plates may be stored all at once in a predetermined portion by another suitable transfer device, and then sequentially loaded onto the received ladle. In the present invention, the lid plate and the device for attaching and detaching the lid plate are configured as described above, and the lid plate is attached and detached by operating them as described above, so that it is extremely easy to attach and detach the cover plate when servicing the ladle. This makes maintenance work much easier and can dramatically streamline maintenance work.

[Brief explanation of drawings]

Figures 1, 2 and 3 are explanatory diagrams showing the flow of the ladle;
4 and 5 are explanatory views of the ladle posture for explaining attachment and detachment of the lid plate, FIG. 6 is a side view of the lid plate mounted on the ladle for implementing the present invention, and FIG. The plan view, FIGS. 8 and 9 are explanatory side views showing the relationship between the ladle and the lid, and FIG. 10 is a side view of the attaching/detaching device, partially cut away. FIG. 11 is a right front view of FIG. 10, and FIGS. 12, 13, and 14 are explanatory side views showing the operation of the attachment/detachment device. 1...Ladle, 2...Steel receiving cart, 3.
...Converter, 4...Trunion shaft, 5...
...Hook, 6...Lid plate, 7...
Mold, 8... Slag pot, 9... Sand, 10.
... Peripheral wall, 11 ... Hanging tool, 12, 14
...Mounting seat, 13...Restriction piece, 15.
... Arm rod, 16 ... Pivot shaft, 17 ...
...Protrusion, 18...Central part, 19...
・Frame, 20... Guide rail, 21...
...Traveling trolley, 22, 27...Bracket,
23...shaft, 24...arm rod, 25...
...Connecting rod, 26, 28... Operating cylinder.

Claims (1)

[Claims] 1. A method for attaching and detaching a lid plate mounted on a ladle, in which a hook is formed on a part of the outer periphery of the lid body of the lid plate, and a hook protrudes toward the outer circumference, and hooks are formed on both sides of the hook in the opposite direction to the attachment direction of the hook. A lid plate is constructed by providing a restraining piece that is restrained when the ladle is moved, and a pair of pivoting arms on the side opposite to the above-mentioned hook, and on the outer periphery of the ladle. The engagement protrusion of the locking piece and the pivot part of the pivot arm are fixed respectively, and when mounting the cover plate, the engagement protrusion and the pivot part of the pivot arm of the locking piece are respectively fixed. When removing the cover plate, rotate the ladle sideways so that the hook is positioned upward, and detach the pivot arm from the pivot. At the same time, in the state in which the restraining piece is engaged, a lifting arm configured to pull up and move the cover plate is advanced to engage the hook of the cover plate, and while pulling up the cover plate, the lifting arm lever is A method for attaching and detaching a lid of a ladle, characterized in that the lid is detached by releasing the engagement of a stopper.