JP7413155B2 - Ladle changing device for continuous casting equipment - Google Patents

Description

The present invention relates to a ladle changing device for continuous casting equipment.

Examples of this type of technology include those described in Patent Documents 1 to 3, for example. Patent Document 1 describes the following technology.

A ladle truck that can reciprocate between a molten steel casting position and a retreat position and in which a ladle can be installed is placed on a horizontal frame. Further, a ladle lifting device is installed at the retracted position. A ladle full of molten steel is placed on a ladle truck at a casting position, and the molten steel in the ladle is poured into a tundish. When the ladle is empty, the ladle truck moves from the casting position to the retreat position. Next, the ladle lifting device installed at the retracted position pushes up the ladle, thereby separating the ladle from the ladle truck. The ladle cart from which the ladle has been separated travels from the retreat position to the casting position, and waits at the casting position for the next full ladle to be carried by the crane.

In the above technology described in Patent Document 1, the ladle at the casting position is installed on the ladle truck, so even if a sudden trouble occurs during casting, the ladle can be moved by moving the ladle truck. It can be quickly evacuated from a crowded position.

Patent Document 2 describes the following technology. A ladle support cart that can reciprocate between a molten steel casting position and a retreat position and is equipped with a lifting device (power jack) for pushing up the ladle is placed on the frame. Further, a ladle support frame is installed on the frame at the casting position. With the ladle supported by the ladle support frame, the molten steel in the ladle is poured into the tundish. When the ladle is empty, the ladle support cart moves on the frame and enters below the empty ladle. Next, the ladle lifting device pushes up the ladle, and the ladle is supported by the ladle support block of the ladle support cart. The ladle support cart supporting the empty ladle moves from the casting position to the retreat position. Meanwhile, the next full ladle is placed by a crane on the ladle support frame installed at the casting position. Further, the empty ladle on the ladle support cart is lifted up by a crane and carried out of the machine after the full ladle is placed on the ladle support pedestal.

Further, Patent Document 3 describes the following technology. A ladle truck that can reciprocate between a molten steel casting position and a ladle standby position and is equipped with a ladle lifting device is placed on a pedestal (framework). Further, a fixed pedestal is installed at the standby position. A ladle full of molten steel is placed on a ladle truck at a casting position, and the molten steel in the ladle is poured into a tundish. When the ladle is empty, the ladle truck moves from the casting position to the standby position. Next, the ladle is placed on the fixed pedestal installed at the standby position by the ladle lifting device built into the ladle truck, and the ladle is separated from the ladle truck. The ladle cart from which the ladle has been separated travels from the standby position to the casting position. At the casting position, the next full ladle, carried by the crane, is waiting.

In the above technology described in Patent Document 3, like the technology described in Patent Document 1, the ladle at the casting position is installed on the ladle truck, so even if a sudden trouble occurs during casting, By moving the ladle cart, the ladle can be quickly evacuated from the casting position.

Utility Model Publication No. 55-122956 Japanese Patent Application Publication No. 54-137434 Japanese Unexamined Patent Publication No. 18257/1983

The technique described in Patent Document 1 has the following problems. In the technique described in Patent Document 1, the time required to replace an empty ladle with a full ladle, that is, to replace the ladle, is as follows. The time required for the ladle cart with an empty ladle installed to travel from the casting position to the retracted position, the time required to separate the empty ladle from the ladle cart at the retracted position, and the time required to move from the retracted position to the casting position. The time required to replace a ladle is the sum of the time required for the ladle truck to travel and the time required for a crane to install a full ladle on the ladle truck at the casting position. The time required to replace this ladle cannot be said to be short.

Furthermore, in the replacement method described in Patent Document 1, a full ladle is handled by a crane above the casting position where an operator is present. A fully loaded ladle is suspended from a crane's wire rope via a hook in an unstable state, and its handling requires visual confirmation and careful work by the operator. Therefore, it is difficult for an operator to place a full ladle on the ladle truck in a short time, and it is difficult to replace the ladle in a short time.

As described above, the technique described in Patent Document 1 has a problem in that the ladle cannot be replaced in a short time.

The technique described in Patent Document 2 also has the same problem as the technique described in Patent Document 1. The time required to replace the ladle in the technique described in Patent Document 2 includes the time required for the ladle support cart to travel from the retreat position to the casting position, and the time required to install an empty ladle on the ladle support cart at the casting position. The time required for the ladle support cart with an empty ladle to move away from the casting position, and the time required for a crane to place a full ladle on the ladle support frame at the casting position. This is the total time. Further, in Patent Document 2, a full ladle is handled by a crane above the casting position where an operator is present, and it is difficult to install a full ladle on a ladle support frame in a short time.

As described above, the technique described in Patent Document 2 has a problem in that the ladle cannot be replaced in a short time.

The technique described in Patent Document 3 also has the same problems as the techniques described in Patent Documents 1 and 2. The time required to replace the ladle in the technique described in Patent Document 3 is the time required for the ladle cart with the empty ladle installed to travel from the casting position to the standby position, and the time required to replace the empty ladle with the ladle at the standby position. The sum of the time required to separate the ladle from the cart, the time required for the ladle cart to travel from the standby position to the casting position, and the time required to place a full ladle onto the ladle cart using a crane at the casting position. It is the time when Also, in Patent Document 3, a full ladle is handled by a crane above the casting position where an operator is located, and it is difficult to install a full ladle on a ladle truck in a short time.

As described above, according to the technique described in Patent Document 3, there is a problem that the ladle cannot be replaced in a short time.

The purpose of the present invention is to be able to quickly evacuate the ladle from the casting position when a sudden trouble occurs during casting, and also to shorten the time required to replace the ladle compared to the conventional method. An object of the present invention is to provide a ladle changing device for continuous casting equipment.

A ladle changing device for continuous casting equipment according to the present invention includes: a ladle truck that holds and moves a ladle; a frame for running the ladle truck; a first support part holding means hung on a first support part provided on a side surface, the first support part holding means provided on the ladle cart for holding the ladle on the ladle cart; a moving mechanism for moving the first support part holding means, which is provided on the ladle truck and capable of preventing the first support part holding means from interfering with the first support part; A first pedestal for mounting the ladle at a casting position where molten steel is injected into a dish, wherein a second support part different from the first support part provided on the side surface of the ladle is mounted. a first mount provided on the frame, a second mount for mounting the ladle at a standby position where the ladle is kept on standby, and a ladle lifting means for raising and lowering the ladle. .

According to the ladle changing device of the present invention, in addition to being able to quickly evacuate the ladle from the casting position when a sudden trouble occurs during casting, the time required to change the ladle is reduced compared to the conventional method. can do.

BRIEF DESCRIPTION OF THE DRAWINGS It is a side view which shows the ladle exchange apparatus based on one Embodiment of this invention, Comprising: It is a figure which shows one state of the ladle truck which comprises the said ladle exchange apparatus during casting. FIG. 1A is a sectional view taken along line AA in FIG. 1A. FIG. 1A is a sectional view taken along line BB in FIG. 1A. 1A is a side view showing a state next to the state shown in FIG. 1A. FIG. FIG. 2A is a sectional view taken along line AA in FIG. 2A. 2A is a side view showing a state next to the state shown in FIG. 2A. FIG. FIG. 3A is a sectional view taken along line AA in FIG. 3A. 3A is a side view showing a state next to the state shown in FIG. 3A. FIG. FIG. 4A is a sectional view taken along line AA in FIG. 4A. 4A is a side view showing a state next to the state shown in FIG. 4A. FIG. 6 is a side view showing a state next to the state shown in FIG. 5. FIG. 7 is a side view showing a state next to the state shown in FIG. 6. FIG. FIG. 7A is a sectional view taken along line BB in FIG. 7A. 7A is a side view showing a state next to the state shown in FIG. 7A. FIG. 9 is a side view showing a state next to the state shown in FIG. 8. FIG. FIG. 3 is a side view showing a state in which casting is performed with the ladle held by the ladle truck. 3B, FIG. 2B, and FIG. 4B are shown side by side. It is a perspective view of the ladle truck shown in FIG. 1A etc. It is a front view which shows the modification of a ladle truck, and is equipped with the moving mechanism comprised so that the 1st support part holding means may move in the direction in which the 1st support part of a ladle protrudes. FIG. 13B is a front view of the ladle truck shown in FIG. 13A in a state where the first support portion holding means has moved in a direction in which the first support portion of the ladle extends. It is a side view which shows a spectacles-shaped hook member. It is a front view which shows the modification of a ladle truck, and is equipped with the moving mechanism comprised so that the 1st support part holding means may move in the direction in which the 1st support part of a ladle protrudes. FIG. 15A is a front view of the ladle truck shown in FIG. 15A in a state where the first support portion holding means has moved in a direction in which the first support portion of the ladle extends.

Continuous casting equipment is equipment that continuously cools and solidifies molten steel into solid steel. Molten steel carried by a ladle 1 (ladle) is poured into a tundish 50, and the poured molten steel is poured from the tundish 50 into a mold. The molten steel poured into the mold is extracted from the bottom as a slab. DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments for implementing the ladle changing device of the present invention will be described with reference to the drawings.

The ladle changing device includes a ladle truck 3 that holds and moves the ladle 1 from a standby position to a casting position, and a frame 4 that allows the ladle truck 3 to travel. The pouring position is a position where molten steel is poured into the tundish 50, and the standby position is a position where molten steel is poured into the tundish 50 after the next ladle 1B containing molten steel (molten steel is poured into the tundish 50 after the ladle 1A pours molten steel. This is the position where the ladle is kept on standby.

The frame 4 of this embodiment is supported by struts 5a and 5b, and is arranged so as to extend from the standby position to the casting position. If the struts supporting the frame 4 are installed at the casting position, a tundish car (not shown) cannot run through the casting position in the depth direction in the figure, so the struts supporting the frame 4 are installed at the casting position. Not yet. A column may be provided to support the frame 4 so as to straddle the running area of the tundish car, but it is not preferable to have the column in the casting work area because it will obstruct the casting operation.

As shown in FIGS. 1B, 1C, etc., the frame 4 has a pair of left and right frame bodies 4a, and a rail 6 is fixed onto the frame bodies 4a. The ladle truck 3 runs on this rail 6. In the frame 4, a first frame 7 having an L-shaped cross section is provided at the lower part of each of the opposite sides of the pair of left and right frame bodies 4a so as to protrude inward from the lower part. As shown in a side view such as FIG. 1A, the pair of first frames 7 are provided at the casting position of the frame 4. The ladle 1 is placed on this first pedestal 7 at the casting position.

A second pedestal 8 for mounting the ladle 1 at the standby position is provided at the standby position. This second pedestal 8 is provided on the floor. Note that if the pedestal at the casting position is installed on the floor, the pedestal and the tundish 50 will interfere with each other. Therefore, the first mount 7 is provided on the frame 4 rather than on the floor.

The ladle 1 is held by a ladle truck 3, and is moved as the ladle truck 3 runs on a frame 4. Here, the running direction of the ladle truck 3, that is, the moving direction of the ladle 1 is defined as direction X. On both sides of the ladle 1 in the direction intersecting the direction and is provided. The first support portion 9 is, for example, a cylindrical trunnion provided on the side surface of the ladle 1. The second support portion 10 is, for example, a plate provided on the side surface of the ladle 1. The ladle 1 is provided with a first support part 9, which is a part held by the ladle cart 3, and a second support part 10, which is a part placed on the first pedestal 7 or the second pedestal 8, as different members. It will be done. Therefore, the ladle truck 3 can freely receive the ladle 1 placed on the first mount 7 or the second mount 8.

The ladle truck 3 can reciprocate on the frame 4 between a casting position and a standby position, and is configured as follows, for example.

As shown in FIG. 12 etc., the ladle truck 3 of the present embodiment includes a pair of left and right running bodies 11 equipped with wheels 11a placed on the rails 6, and a gate connecting the left and right running bodies 11 to each other. It is equipped with a trolley body 12 of the shape. Openings 13a extending in the vertical direction are formed in a pair of left and right side wall portions 13 constituting the truck body 12, respectively. The elevating frame 14 is inserted into this opening 13a. The proximal end portions of a pair of left and right C-shaped hook members 15 serving as first support portion holding means to be hung on the first support portion 9 of the ladle 1 are rotatably attached to the elevating frame 14 via pins 16 . The C-shaped hook member 15 is a member with a C-shaped tip that is hung on the first support portion 9 . As shown in FIG. 1A and the like, the C-shaped hook member 15 is attached to the elevating frame 14 so that the direction from the standby position to the casting position is on the open side, for example.

Inside the traveling body body 11b of each of the traveling bodies 11, a first hydraulic cylinder 17 is installed as a ladle lifting means for raising and lowering the ladle 1. Further, on the side surface of the traveling body main body 11b, there is a second hydraulic cylinder 18 as a moving mechanism for moving the C-shaped hook member 15, and the C-shaped hook member 15 interferes with the first support portion 9 of the ladle 1. A second hydraulic cylinder 18 is installed that can prevent this. As the cylinder rod 17a of the first hydraulic cylinder 17 expands and contracts, the C-shaped hook member 15 moves up and down via the elevating frame 14. Similarly, as the cylinder rod 18a of the second hydraulic cylinder 18 expands and contracts, the C-shaped hook member 15 moves up and down via the elevating frame 14.

The first hydraulic cylinder 17 has a large diameter and a short stroke because its purpose is to raise and lower the ladle 1, which is a heavy object. On the other hand, the second hydraulic cylinder 18 is a hydraulic cylinder with a small diameter and a long stroke because the purpose is to raise and lower only the C-shaped hook member 15 when the ladle 1 is not suspended by the C-shaped hook member 15. Ru. Since the second hydraulic cylinder 18 has a small diameter, there is no need to increase the discharge amount of a hydraulic pump (not shown) that drives the second hydraulic cylinder 18, and the C-shaped hook member 15 can be raised and lowered at high speed.

A method of using the ladle changing device having the above configuration will be described with reference to FIGS. 1A to 10.

FIG. 1A shows a state in which molten steel is being poured into the tundish 50 from the ladle 1A. The ladle 1A is placed on the first mount 7 provided on the frame 4 at the casting position, and molten steel is poured into the tundish 50 from the ladle 1A. Further, a ladle 1B filled with molten steel is placed on a second pedestal 8 provided on the floor at the standby position. The ladle 1B is placed on the second pedestal 8 by an overhead crane (not shown). The ladle truck 3 is stopped on a frame 4 between a standby position and a casting position.

When the molten steel in the ladle 1A decreases and the time for ladle replacement approaches, the ladle cart 3 is moved to a position slightly to the left of the standby position, as shown in FIG. 2A. At this time, by operating the second hydraulic cylinder 18 and extending its cylinder rod 18a, the C-shaped hook member 15 is raised to a position higher than the first support portion 9. As a result, the C-shaped hook member 15 can pass above the first support portion 9 of the ladle 1B without interfering with it.

The ladle truck 3 is stopped at a position slightly to the left of the standby position. By contracting the cylinder rod 18a of the second hydraulic cylinder 18, the C-shaped hook member 15 is lowered to the lower limit position. Thereafter, as shown in FIG. 3A, the ladle truck 3 is moved to the standby position and stopped.

Next, the C-shaped hook member 15 is raised by operating the first hydraulic cylinder 17 and extending its cylinder rod 17a. As a result, the C-shaped hook member 15 is hooked onto the first support portion 9 of the ladle 1B, and the ladle 1B is lifted by the C-shaped hook member 15 via the first support portion 9, as shown in FIG. 4A. The ladle 1B is lifted to such an extent that the second support portion 10 of the ladle 1B is slightly separated from the upper surface of the second pedestal 8. Therefore, the stroke of the first hydraulic cylinder 17 may be short.

Next, as shown in FIG. 5, the ladle truck 3 is moved toward the casting position while holding the ladle 1B. The ladle truck 3 is stopped at a retracted position at a distance that does not interfere with the casting work performed by the ladle 1A.

FIG. 6 shows a state in which the casting work using the ladle 1A has been completed and the empty ladle 1A is about to be carried out by the overhead crane 19. When the ladle 1A leaves above the frame 4 at the casting position, the ladle truck 3 is moved to the casting position while holding the ladle 1B, and is stopped at the casting position.

Next, as shown in FIG. 7A, the cylinder rod 17a of the first hydraulic cylinder 17 is retracted, and the C-shaped hook member 15 is lowered to its lower limit position. As a result, the second support portion 10 of the ladle 1B is placed on the first pedestal 7. The ladle 1B is set at the casting position. This completes the ladle exchange from the ladle 1A to the ladle 1B, and it becomes possible to inject molten steel into the tundish 50 from the ladle 1B.

As shown in FIG. 8, the ladle truck 3 is moved toward the standby position, and is stopped between the casting position and the standby position. Thereafter, as shown in FIGS. 9 and 10, the next ladle 20 filled with molten steel is placed on the second pedestal 8 at the standby position using the overhead crane 19.

Here, as shown in FIGS. 1A, 8, etc., during pouring of molten steel from the ladle 1 into the tundish 50, a sudden trouble occurred such as the discharge port of the ladle 1 not closing. In this case, the following measures will be taken:

The ladle truck 3 is driven to the casting position. The first hydraulic cylinder 17 is operated to lift the ladle 1 with the C-shaped hook member 15. Then, the ladle truck 3 holding the ladle 1 is driven to a retracted position (a position where the ladle is retracted) between the casting position and the standby position. As a result, the ladle 1 is retracted from the casting position. Thereby, the safety of the casting worker can be ensured. Although not shown, a molten steel storage container is installed on the floor at the retreat position. By putting the molten steel leaking from the ladle 1 into this molten steel storage container, damage to the tundish 50 and the casting place from the molten steel can be minimized.

In this embodiment, the C-shaped hook member 15 is attached to the elevating frame 14 of the ladle truck 3 so that the direction from the standby position to the casting position is on the open side. According to this configuration, instead of raising the C-shaped hook member 15 and moving the ladle cart 3 to a position slightly to the right of the casting position, the ladle cart 3 is simply moved to the casting position, and the ladle 1 Since the C-shaped hook member 15 can be hung on the first support part 9 of the mold, if a sudden trouble occurs during casting, the ladle 1 at the casting position can be quickly evacuated with a few operations. Further, since it is not necessary to run the ladle truck 3 to the right of the casting position, the amount of overhang of the frame 4 in the direction from the standby position to the casting position can be reduced.

Note that until the molten steel in the ladle 1 decreases and the time to replace the ladle approaches, instead of stopping the ladle cart 3 between the casting position and the standby position, as shown in FIG. By performing casting with the ladle 1 held by the ladle truck 3, the ladle 1 can be more quickly evacuated from the casting position if a sudden trouble occurs. In FIG. 10, the ladle 1 is held by the ladle cart 3 (C-shaped hook member 15), but instead, the ladle 1 is placed on the first pedestal 7, and the C-shaped hook The ladle truck 3 may be stopped at the casting position so that the ladle 1 can be lifted by the member 15 at any time.

According to the ladle exchange device including the ladle cart 3, the frame 4, the first mount 7, and the second mount 8, even if the next ladle 1B is placed on the second mount 8, the ladle cart 3 is placed on the frame 4. Since the ladle cart 3, which does not hold the ladle 1, can be freely moved, the ladle cart 3, which does not hold the ladle 1, can be stopped between the casting position and the standby position until the time for replacing the ladle approaches. If a sudden trouble occurs during casting, the ladle 1A can be quickly evacuated from the casting position using the ladle truck 3.

The time required to exchange an empty ladle 1A with a full ladle 1B using the ladle exchange device (time required for ladle exchange) is the time required to carry out an empty ladle 1A with an overhead crane 19 or the like; The time required for the ladle cart 3 holding the ladle 1B, which is stopped between the casting position and the standby position, to travel to the casting position, and the casting time using the first hydraulic cylinder 17 as the ladle lifting means. This is the total time including the time required to place the ladle 1B on the first mount 7 at the position.

The time required to replace the ladle is shorter than the time required to replace the ladle using the methods described in Patent Documents 1 to 3. In all of the methods described in Patent Documents 1 to 3, a full ladle is handled by a crane above the casting position where the operator is located. Therefore, it is difficult to install a full ladle on a ladle truck (Patent Documents 1 and 3) or to install a full ladle on a ladle support frame (Patent Document 2) in a short time. On the other hand, in the ladle changing device described above, which is an embodiment of the present invention, the ladle 1 filled with molten steel can be placed on the first pedestal 7 at the casting position using the ladle cart 3 instead of a crane. Easy to operate. Therefore, according to the ladle changing device of this embodiment, the time required to place the ladle at the casting position can be reduced compared to the conventional method, and the ladle can be changed in a shorter time than the techniques described in Patent Documents 1 to 3. can do.

As described above, according to the ladle changing device of the present embodiment, in addition to being able to quickly evacuate the ladle 1 from the casting position when a sudden trouble occurs during casting, the ladle 1 can be exchanged in a short period of time. can be made shorter than before.

Furthermore, according to the ladle changing device of this embodiment, the ladle 1 can be placed using the ladle cart 3, so there is no need to use a crane to handle the ladle 1, which is full of molten steel, above the casting position where the operator is located. , the ladle 1 can be set in the casting position more safely than before.

13A and 13B are diagrams showing a modification of the ladle truck 3. FIG. The moving mechanism (second hydraulic cylinder 18) included in the ladle truck 3 shown in FIGS. 1A to 12 is configured so that the C-shaped hook member 15 (first support portion holding means) moves upward. On the other hand, the moving mechanism 23 included in the ladle cart 21 shown in FIGS. 13A and 13B is configured such that the first support portion holding means moves in the direction in which the first support portion 9 of the ladle 1 extends. . Further, the first support portion holding means in this modification is a spectacle-shaped hook member 22 having an annular tip portion 22a that is hung on the first support portion 9, as shown in FIG. Note that also in the ladle truck 21 of this modification, the C-shaped hook member 15 may be used as the first support portion holding means. Although not shown in the drawings, the ladle truck 21 also has a first hydraulic cylinder 17 as a ladle lifting means installed inside the traveling body main body 11b constituting the traveling body 11, like the ladle truck 3.

The moving mechanism 23 in this modification is specifically configured as follows. A set of moving members 24 is installed on the upper surface of the elevating frame 14 so as to be movable along the longitudinal direction of the elevating frame 14 . The moving members 24 are connected to each other by a hydraulic cylinder 25, and as the cylinder rod 25a expands and contracts, the moving members 24 move in opposite directions along the longitudinal direction. One end of a link member 28 is attached to each moving member 24 via a pin 26. The proximal end of the spectacle hook member 22 is attached to the other end of the link member 28 via a pin 27 .

By extending the cylinder rod 25a of the hydraulic cylinder 25, the spectacle-shaped hook member 22 moves in the direction in which the first support portion 9 of the ladle 1 extends, as shown in FIG. 13B. Interference between the support portion 9 and the spectacle-shaped hook member 22 is prevented.

When lifting the ladle 1, the cylinder rod 25a of the hydraulic cylinder 25 is retracted, so that the tip 22a of the spectacle hook member 22 is fitted onto the first support portion 9 of the ladle 1, as shown in FIG. 13A. . Thereafter, by extending the cylinder rod 17a of the first hydraulic cylinder 17 (not shown), the spectacle-shaped hook member 22 rises together with the elevating frame 14, and the ladle 1 is lifted.

The moving mechanism (second hydraulic cylinder 18) of the ladle truck 3 shown in FIGS. 1A to 12 will be compared with the moving mechanism 23 of the ladle truck 21 shown in FIGS. 13A and 13B. As can be seen from FIG. 7B, FIG. 13A, and FIG. 13B, when the first support portion holding means is a moving mechanism configured to move upward, such as the second hydraulic cylinder 18, the first mount 7 The amount of inward protrusion (protrusion distance) can be reduced. As a result, the torsional torque applied to the frame body 4a (frame 4) due to the dead weight of the ladle 1 can be reduced. On the other hand, when the moving mechanism 23 shown in FIGS. 13A and 13B is configured such that the first supporting portion holding means moves in the direction in which the first supporting portion 9 extends, the first supporting portion Since the amount of elevation of the holding means is only the amount necessary for lifting the ladle 1, the amount of elevation of the first support portion holding means can be reduced.

The above embodiments and modifications can be modified as follows.

In the ladle truck 3 shown in FIGS. 1A to 12, the ladle lifting means and the moving mechanism are separately mounted on the ladle truck 3, such as a first hydraulic cylinder 17 as a ladle lifting means and a second hydraulic cylinder 18 as a moving mechanism. It is provided. According to this configuration, as already explained, the second hydraulic cylinder 18 can be made small in diameter, and the C-shaped hook member 15 can be raised and lowered at high speed even with a small capacity hydraulic power source (hydraulic pump). Here, for example, the stroke of the first hydraulic cylinder 17 may be lengthened, the second hydraulic cylinder 18 may be omitted, and the first hydraulic cylinder 17 may also be used as a moving mechanism. That is, the ladle lifting means may also serve as a moving mechanism. According to this configuration, the configuration of the ladle truck 3 becomes simple.

The ladle truck 3 shown in FIGS. 1A to 12 and the ladle truck 21 shown in FIGS. 13A and 13B are both equipped with a first hydraulic cylinder 17 as a ladle lifting means. Instead, the first hydraulic cylinder 17 of the ladle truck 3 may be omitted by providing ladle lifting means on each of the second pedestal 8 at the standby position and the first pedestal 7 at the casting position.

The moving mechanism included in the ladle truck 3 shown in FIGS. 1A to 12 is configured so that the C-shaped hook member 15 (first support portion holding means) moves vertically upward. Alternatively, the moving mechanism may be configured to move the C-shaped hook member 15 (first support portion holding means) obliquely upward. Alternatively, the C-shaped hook member 15 may be configured to flip up around the pin 16, thereby allowing the first support portion holding means to move upward in an arc.

The moving mechanism 23 included in the ladle cart 21 shown in FIGS. 13A and 13B is configured such that the first support portion holding means moves in the horizontal direction in which the first support portion 9 of the ladle 1 extends. Alternatively, as shown in FIGS. 15A and 15B, the moving mechanism may be configured such that the first support portion holding means tilts (for example, makes a pendulum movement) in the direction in which the first support portion 9 extends. .

The difference between the ladle truck 21 shown in FIGS. 13A and 13B and the ladle truck 29 shown in FIGS. 15A and 15B is the configuration of the moving mechanism. The moving mechanism 30 included in the ladle cart 29 shown in FIGS. 15A and 15B is configured as follows. A set of brackets 32 are installed at intervals on the upper surface of the lifting frame 14. A midway portion of the link member 31 is attached to each bracket 32 via a pin 26. A tip of a cylinder rod 33a of a hydraulic cylinder 33 is attached to one end of the link member 31. The hydraulic cylinder 33 is installed on the upper surface of the elevating frame 14. A proximal end portion of the spectacle-shaped hook member 22 is attached to the other end portion of the link member 31 via a pin 27 .

By contracting the cylinder rod 33a of the hydraulic cylinder 33, the spectacle-shaped hook member 22 moves (tilts) in the direction in which the first support portion 9 of the ladle 1 extends, as shown in FIG. 15B. Interference between the first support portion 9 and the spectacle-shaped hook member 22 is prevented.

When lifting the ladle 1, the cylinder rod 33a of the hydraulic cylinder 33 is extended, so that the tip 22a of the spectacle-shaped hook member 22 is fitted onto the first support portion 9 of the ladle 1, as shown in FIG. 15A. . Thereafter, by extending the cylinder rod 17a of the first hydraulic cylinder 17 (not shown), the spectacle-shaped hook member 22 rises together with the elevating frame 14, and the ladle 1 is lifted.

The C-shaped hook member 15 may be attached to the ladle truck 3 so that the direction from the casting position to the standby position is on the open side.

In the standby position, the bottom surface of the ladle instead of the second support part 10 of the ladle may be placed on the second pedestal 8. Alternatively, a pedestal having the same structure as the first pedestal 7 at the casting position may be provided in the standby position portion of the frame 4, and the second support portion 10 of the ladle may be placed on the pedestal in the standby position.

In addition, it is of course possible to make various other changes within the range that can be imagined by those skilled in the art.

1 (1A, 1B): Ladle 3: Ladle cart 4: Frame 7: First pedestal 8: Second pedestal 9: First support part 10: Second support part 15: C-shaped hook member (first support part holding means )
17: First hydraulic cylinder (ladle lifting means)
18: Second hydraulic cylinder (moving mechanism)
21: Ladle cart 22: Glasses-shaped hook member (first support portion holding means)
23: Moving mechanism 29: Ladle cart 30: Moving mechanism 50: Tundish

Claims (4)

a ladle cart that holds and moves the ladle;
a frame for running the ladle truck;
a first support part holding means hung on a first support part provided on a side surface of the ladle in a direction intersecting a direction in which the ladle car runs; A first support portion holding means provided on the trolley;
a second hydraulic cylinder for raising and lowering the first support part holding means in a state where the ladle is not suspended by the first support part holding means , the first support part holding means being connected to the first support part; a second hydraulic cylinder provided on the ladle truck and capable of preventing interference;
A first pedestal for mounting the ladle at a casting position where molten steel is poured into a tundish, the second support being different from the first support provided on the side surface of the ladle; a first pedestal provided on the frame, on which the first pedestal is placed;
a second pedestal for mounting the ladle at a standby position where the ladle is kept on standby;
a first hydraulic cylinder having a larger diameter and a shorter stroke than the second hydraulic cylinder, the first hydraulic cylinder raising and lowering the ladle;
Equipped with
Ladle changing device for continuous casting equipment. The ladle exchange device for continuous casting equipment according to claim 1 ,
The first support portion holding means is a C-shaped hook member having a C-shaped tip that is hung on the first support portion.
Ladle changing device for continuous casting equipment. In the ladle exchange device for continuous casting equipment according to claim 2 ,
The C-shaped hook member is attached to the ladle truck so that the direction from the standby position to the casting position is on the open side.
Ladle changing device for continuous casting equipment. In the ladle exchange device for continuous casting equipment according to any one of claims 1 to 3 ,
the first hydraulic cylinder and the second hydraulic cylinder are separately provided on the ladle truck;
Ladle changing device for continuous casting equipment.

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