JP2002239689A - Tundish car in continuous casting facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tilting device for tundish in a continuous casting facility with which the structure of the facility can be simplified and minimized and maintenance of the tundish can easily be performed without developing the breakage of an immersion nozzle and a mold. SOLUTION: In a tundish car 1 shiftable on a casting floor F in the continuous casting facility, the tundish car 1 is composed of a truck 10 provided with a shifting means, an ascending/descending beam 21 ascending/descending by loading the tundish 2, an ascending/descending device 30 vertically ascending/ descending the ascending/descending beam 21 under state of holding the tundish 2 to the horizontal level and the tilting device for tilting the tundish 2 at slag-off working time, and the tilting device is operated together with the ascending/ descending beam 21 to the tundish 2. Since the tilting device is shifted together with truck 10, the facility can be minimized, and when the immersion nozzle 4 is inserted into the mold M, it is no care that the immersion nozzle 4 and the mold M are broken.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a tundish car in a continuous casting facility. The continuous casting facility is provided with a tundish for pouring molten metal into a continuous casting mold (hereinafter, referred to as a mold). After the molten metal is poured into the mold, residual steel and slag (hereinafter referred to as slag) are left inside the tundish. The slag must be removed from the tundish, since this slag adversely affects the quality of the cast product. For this reason, after the molten metal is poured into the mold, the tundish is moved from the pouring position on the mold to the standby position, and the tundish is tilted at the standby position to discharge the residue remaining in the tundish. Work is performed. The present invention relates to a tundish car for moving a tundish from a pouring position to a standby position.

[0002]

2. Description of the Related Art A conventional tundish car is basically composed of a bogie traveling on a cast floor and an elevating device for elevating the tundish. Therefore, if the tundish is placed on the tundish car and moved to the pouring position, the tundish is lowered on the mold by the elevating device, and the immersion nozzle is inserted into the mold, the molten metal can be poured into the mold. . When the pouring is completed, the tundish is raised by the lifting device, the immersion nozzle is removed from the mold, and the carriage is moved while the tundish is raised, so that the tundish can be moved to the standby position.

In the conventional tundish car, since no device for tilting the tundish is provided, a tilt cylinder or a tilting cart for tilting the tundish is provided at the standby position of the tundish separately from the tundish car. Is provided.

However, since the tilt cylinder is fixed to the cast floor, it must be provided at a position where it does not hinder the movement of the tundish car. In addition, it is necessary to retract the tilting carriage from the movement path of the tundish car except during the waste disposal work. For this reason, in addition to the movement path of the tundish car, a place for installing the tilt cylinder and a place for evacuating the tilting carriage are required on the cast floor, so the area of the cast floor becomes large, and equipment is required. There is a problem that the size is increased.

A tundish car (conventional example 1) described in JP-B-54-39248 has been developed in order to reduce the area of the casting bed and downsize the casting equipment. The tundish car of the conventional example 1 is provided with a tilting device instead of an elevating device on a carriage, and the tilting device includes a movable rail,
It is composed of a pivot block that meshes with the movable rail, and a cylinder that rolls the pivot block on the movable rail. Therefore, if the tundish is placed on the pivot block and the cylinder is extended and contracted and the pivot block is rolled on the movable rail, the tundish is tilted together with the pivot block, so that the waste can be removed.

[0006]

However, the tundish car of the prior art 1 does not have an elevating device for vertically elevating the tundish. Therefore, unless the tundish is tilted by rolling the pivot block, The immersion nozzle cannot be inserted into the mold or the immersion nozzle cannot be removed from the mold. Therefore, when the immersion nozzle is inserted into the mold or when the immersion nozzle is removed from the mold, the immersion nozzle may interfere with the inner surface of the mold and damage the immersion nozzle and the mold.

SUMMARY OF THE INVENTION In view of the above circumstances, the present invention makes it possible to simplify and reduce the size of the equipment, eliminate the danger of damaging the immersion nozzle and the mold, and facilitate the maintenance of the tundish in a continuous casting equipment in which the tundish can be easily maintained. The purpose is to provide.

[0008]

According to a first aspect of the present invention, there is provided a continuous casting apparatus having a tundish car which is movable on a casting bed. A rolling device, wherein the tilting device is provided on the tundish car, the tundish car is provided so as to be movable up and down with respect to the vehicle body, and an elevating beam on which the tundish is placed; Lifting device for vertically moving the lifting beam while keeping the horizontal,
The tilting device tilts the tundish together with a lifting beam. The tundish tilting device in the continuous casting equipment according to claim 2 is the invention according to claim 1, wherein one end of the lifting beam is swingably attached to the lifting device, and the tilting device is mounted on the tundish. A tilt cylinder provided between the body of the dish car and the elevating beam, wherein a cylinder body of the tilt cylinder is swingably attached to the body of the tundish car; Is rotatably attached to the lifting beam. According to a third aspect of the present invention, in the tundish tilting device for a continuous casting facility, a switching valve for switching a hydraulic pressure applied to a piston side oil chamber of the tilting cylinder between a high pressure and a low pressure is provided. The switching valve causes the piston-side oil chamber of the tilt cylinder to have a low pressure when the lifting beam is raised. According to a fourth aspect of the present invention, there is provided a tundish tilting device in a continuous casting facility according to the first, second or third aspect, wherein a work table is provided on a vehicle body of the tundish car so as to be able to advance and retreat, and the tundish is tilted. When this is done, the work table is advanced to the work position, and when the tundish is returned, the work table is retracted to the retreat position.

According to the first aspect of the present invention, the tundish can be tilted together with the lifting beam by the tilting device, and the tilting device moves with the carriage.
There is no need to provide a place for installing the tilting device on the cast floor or to provide a place for retracting the tilting carriage, and the equipment can be downsized. Further, since the tundish can be vertically moved up and down together with the elevating beam by the elevating device, there is no fear of damaging the immersion nozzle and the mold when inserting the immersion nozzle into the mold.
According to the second aspect of the present invention, if the tilting cylinder is expanded and contracted, the lifting beam can be swung about one end attached to the lifting device, so that the tundish is tilted together with the lifting beam. Can be. Moreover, since the tilting device is a cylinder, the structure of the device is simple and compact. According to the third aspect of the present invention, when the lifting beam is raised, the pressure applied to the piston-side oil chamber of the tilting cylinder by the switching valve can be made lower than at the time of tilting. Then, even if the tilt cylinder is extended, the lifting beam is not tilted, so that the lifting beam can be safely raised and lowered. In addition, since the tilt cylinder extends in synchronization with the lifting beam, when the lifting beam is raised by the lifting device, the tilt cylinder does not become a resistance. According to the invention of claim 4, if the work table is advanced to the work position in a state where the tundish is tilted, the work table approaches the lower surface of the tundish. Can be easily done. In addition, if it is retracted to the retracted position, it does not interfere with the tundish, so that it does not hinder the casting operation.

[0010]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 7 is a schematic view of a casting floor F of the continuous casting facility. In the figure, reference numerals F and M indicate a cast floor and a mold, respectively. Reference numeral I indicates a casting position, and reference numeral II indicates a waste position. Between the pouring position I and the waste position II, a pair of rails R, R
The tundish car 1 according to the present embodiment runs on the rail R. At the waste position II, a pit T is provided on the side of the rail R, and a pot P for receiving the waste discharged from the tundish 2 described later is accommodated in the pit T. .

Now, the tundish car 1 of the present embodiment will be described. FIG. 1 is a plan view of a tundish car 1 of the present embodiment. FIG. 2 is a sectional view taken along the line II-II in FIG. FIG. 3 is a front view of the tundish car 1 of the present embodiment. FIG. 4 is a sectional view taken along the line IV-IV in FIG. FIG. 5 is a sectional view taken along line VV of FIG.

In FIG. 4, reference numeral 2 denotes a tundish. The tundish 2 has a sliding nozzle 3 and a dipping nozzle 4 at the bottom. For this reason, if the molten metal is poured into the tundish 2 with the immersion nozzle 4 inserted into the mold M at the casting position I, the molten metal can be poured into the mold M through the sliding nozzle 3 and the immersion nozzle 4. .

As shown in FIG. 7, the tundish car 1 of the present embodiment is provided so as to be movable on a rail R of the casting floor F. The vehicle travels between the waste positions II.
As shown in FIGS. 1 and 2, this tundish car 1
Is a trolley 10, a pair of left and right elevating beams 21, 21,
This is basically composed of a lifting device 30, a tilt cylinder 40, and a worktable 50.

First, the cart 10 will be described. In FIG. 5, reference numerals 11a and 11b denote a pair of main frames and a sub-frame 11b, and the pair of main frames 11a, 11a and the sub-frame 11b form a substantially U-shaped carriage 10 in plan view. I have. At the rear end of the main frame 11a of the carriage 10, pillars 11d are erected. A worktable 50 is attached to the upper end of the pillar 11d, and details will be described later.

Further, as shown in FIG. 3, wheels 12 driven by a motor 13 are provided on the lower surface of the carriage 10. Therefore, when the motor 13 is driven, the wheels 1
2, the tundish car 1 is moved on the rail R. The motor 13 and the wheels 12 are the moving means referred to in the claims.

Next, the lifting beam 21 will be described. Figure 1
As shown in FIG. 2, a pair of left and right elevating beams 21, 21 is provided above the carriage 10. The lifting beam 21 is supported by a column 11d and a lifting device 30 described later.
The front end and the rear end are supported by the lifting guide 32. The lifting beam 21 includes a trunnion shaft 2a and a trunnion shaft 2 of the tundish 2.
A trunnion receiver 25 for placing b thereon is provided.
The trunnion receiver 25 is a roller for finely adjusting the position of the tundish 2 placed on the lifting beam 21.

Next, the lifting device 30 will be described. As shown in FIG. 2 and FIG.
And two for each mainframe 11a, for a total of 4
The elevating cylinder 31 is provided upright. The lifting cylinder 31 is disposed with its piston rod facing upward, and the lower end of its cylinder body is connected to the main frame 11.
Fixed to a. These four lifting cylinders 31
It is expanded and contracted synchronously so that the amount of expansion and contraction becomes the same. Further, at the tip of the pair of main frames 11a, 11a,
An elevating guide 32 that can be extended and contracted vertically is provided upright. The front end of the lifting beam 21 is attached to the upper end of the lifting guide 32. Therefore, if the four lifting cylinders 31 are expanded and contracted, the tundish 2 can be raised and lowered together with the lifting beam 21 while keeping the tundish 2 horizontal. At this time, the lifting guide 32
Since it expands and contracts according to the elevation of the tundish 2, it does not hinder the elevation of the tundish 2. The lifting beam 2
The method of raising and lowering 1 is not limited to a cylinder, and any method capable of raising and lowering the lifting beam 21 while keeping the lifting beam 21 horizontal, such as a screw jack, may be used.

According to the present invention, the tilt cylinder 40 is provided on the tundish car 1, and the tundish 2 is tilted together with the lifting beam 21 by the tilt cylinder 40 while the tundish 2 is mounted on the tundish car 1. It is a characteristic that Therefore, the details of the lifting beam 21 and the tilt cylinder 40, which are features of the present invention, will be described.

First, details of the lifting beam 21 will be described.
As shown in FIG. 2 and FIG.
The front ends of the pair of elevating beams 21 and 21 are swingably attached to the upper ends of the pair 2 and 32 by swing pins 28, respectively. Also, at the front end of each lifting beam 21,
A fixing cylinder 26 for fixing the trunnion shaft 2a in front of the tundish 2 to the lifting beam 21 is provided. Further, a mounting portion 27 for fixing the trunnion shaft 2b of the tundish 2 to the lifting beam 21 is provided at the rear end of each lifting beam 21.

Next, the tilt cylinder 40 will be described. FIG. 9 is a schematic explanatory view of a state in which the tundish 2 is tilted. As shown in FIGS. 2 and 9, a pair of right and left tilt cylinders 40 is provided between the carriage 10 and the lifting beam 21.
40 are provided. Each tilt cylinder 40 is, for example, a known hydraulic cylinder, and has a cylinder body 41.
The rear end of the piston rod 42 is swingably attached to an appropriate position of the main frame 11a, and the tip of a piston rod 42 is rotatably attached to an appropriate position of the elevating beam 21 of the elevating beam 21. Left and right tilt cylinders 40, 4
0 is expanded and contracted synchronously so that the amount of expansion and contraction becomes the same.

For this reason, a pair of right and left tilt cylinders 40,
By expanding and contracting the vertical beam 40, the pair of right and left vertical beams 21, 21 can be swung in synchronization with one end attached to the vertical guide 32 as a fulcrum.
At the same time, the tundish 2 can be tilted. Moreover, since the tilting device is a cylinder, the structure of the device can be made simple and compact.

Further, the tundish 2 can be securely fixed to the pair of left and right elevating beams 21, 21 by the fixing cylinder 26 and the mounting portion 27.
Even if the tundish 2 is tilted together with the lifting beam 21, the tundish 2 does not fall off the lifting beam 21.

Further, since the tilt cylinder 40 moves together with the cart 10, there is no need to provide a place for installing the tilt device on the casting floor F or to provide a place for retracting the tilt cart. Can be reduced in size.

Next, the hydraulic circuit 60 for operating the tilt cylinder 40 will be described. FIG. 6 is a schematic diagram of a hydraulic circuit 60 that operates the tilt cylinder 40. In the figure, a solid line indicates an operating pipeline, and a broken line indicates a pilot pipeline. Reference numeral 61 denotes an oil feed pump. Between the oil feed pump 61 and the piston side oil chamber 43 of the tilt cylinder 40, a pressure reducing valve 62, a check valve 63 and a tuning motor 6 are provided.
7 are connected in that order by a working line. The tuning motor 67 is for equalizing the flow rate of oil supplied to the cylinder bodies 41 of the left and right tilt cylinders 40. A check valve 64 is provided between the oil tank S and an operation pipe connecting the check valve 63 and the tuning motor 67. In addition, a pressure reducing valve 69 and a check valve 66 are connected between the oil pump 61 and the rod-side oil chamber 44 of the tilt cylinder 40 in this order by a working pipeline. In addition, a check valve 65 is provided between the oil tank S and an operation pipe connecting the check valve 66 and the rod-side oil chamber 44.

Further, an oil feed pump 61, a check valve 63,
64, 65, 66 are connected by a pilot line, and an expansion / contraction switching valve 68 is interposed in the pilot line. The expansion / contraction switching valve 68 includes all the check valves 6.
3, 64, 65, 66, a neutral path c for applying pilot pressure, a check valve 63, an extension path a for releasing pilot pressure from the check valve 65, a check valve 64 and a check valve 66.
And a contraction path b for releasing the pilot pressure from

Therefore, during casting or the like, the expansion / contraction switching valve 68
Is held in the neutral path c, all the check valves 63, 64,
Since the valves 65 and 66 are closed, the tilt cylinder 40 does not operate. When the lifting beam 21 is tilted, the expansion / contraction switching valve 68 is switched to the extension path a. Then, the check valve 64 and the check valve 66 remain closed, but the pilot pressure is released from the check valve 63 and the check valve 65 to open. Therefore, a constant pressure oil is supplied from the oil feed pump 61 to the piston side oil chamber 43 through the pressure reducing valve 62 and the check valve 63, and the oil is supplied from the rod side oil chamber 44 through the check valve 65. Since the tilt cylinder 40 is returned to the tank S, the tilt cylinder 40 extends. Conversely, when returning the lifting beam 21, the expansion / contraction switching valve 68 is switched to the contraction path b. Then, the check valve 63 and the check valve 65 close, and the check valve 64
The pilot pressure is released from the check valve 66 and the check valve 66 is opened. Therefore, the oil supply pump 61 sends the pressure reducing valve 69 and the check valve 6
6, oil at a constant pressure is supplied to the rod-side oil chamber 44, and the oil is returned from the piston-side oil chamber 43 to the oil tank S through the check valve 64, so that the tilt cylinder 40 contracts. .

A pilot line is provided between the pressure reducing valve 62 and the oil tank S, and a low pressure side pressure reducing valve 72 is provided in the pilot line. The low-pressure side pressure reducing valve 72 is for returning the oil to the oil tank S when the oil flowing from the relief outlet of the pressure reducing valve 62 reaches a certain pressure or higher. A switching valve 71 is provided in a pilot line between the low-pressure side pressure reducing valve 72 and the pressure reducing valve 62. The switching valve 71 includes a low pressure path f that connects the relief outlet of the pressure reducing valve 62, the inflow port of the low pressure side pressure reducing valve 72, and a high pressure path d that closes the relief outlet of the pressure reducing valve 62.

For this reason, when the tundish 2 is tilted, if the switching valve 71 is set to the high pressure path d, the pressure of the oil passing through the pressure reducing valve 62 does not decrease even if the pressure of the pressure reducing valve 62 becomes higher than a predetermined pressure. Thus, the tilting cylinder 40 can be reliably extended, and the lifting beam 21 can be tilted. On the other hand, when the lifting beam 21 is raised, the switching valve 71
Is switched to the low pressure path f, the pressure applied to the piston side oil chamber 43 of the tilt cylinder 40 can be made lower than at the time of tilt. Then, even if the tilting cylinder 40 extends, the lifting beam 21 is not tilted, so that the lifting beam 21 can be safely raised and lowered. Moreover, since the tilting cylinder 40 extends in synchronization with the lifting of the lifting beam 21, when the lifting cylinder 21 raises the lifting beam 21,
The tilt cylinder 40 does not become a resistance.

Next, the work table 50 will be described. As shown in FIGS. 1 and 2, a pair of columns 11 d, 11
A beam 11e is provided between the upper ends of d. This beam 11e
A scaffold 11f is attached above the. This beam 11
e and the scaffold 11f, there is a movable plate 51 which is a plate-shaped member.
Is mounted horizontally. On the upper surface of the movable plate 51, a handrail 55 is attached so as to be able to stand up and down. The handrail 55 is normally laid down and is erected only during maintenance work (see FIG. 9).
Also, rails 52 and 53 are attached to both left and right ends of the movable plate 51. The rails 52 and 53 are
Roller 11 attached to the upper surface of the
It is movably supported by g. In addition, the movable plate 5
A rack (not shown) is provided between the rails 52 and 53 on the lower surface of 1. The rack engages with a pinion attached to a main shaft of an advance / retreat motor (not shown). Therefore, if the motor for retreat is rotated, the movable plate 51 can reciprocate back and forth between the working position and the retreat position with the rails 52 and 53 supported by the rollers 11g.

Therefore, if the work table 50 is advanced to the work position with the tundish 2 tilted, the work table 50
Approaches the lower surface of tundish 2, so tundish 2
The maintenance of the sliding nozzle 3 and the like provided on the lower surface of the device can be easily performed. Further, if the work table 50 is retracted to the retracted position, the work table 50 does not interfere with the tundish 2 and does not hinder the casting operation. At the time of casting, the work table 50 also has a function as a splash cover for preventing the molten metal from scattering from inside the tundish 2.

Next, the tundish car 1 of this embodiment will be described.
The function and effect of will be described. 8A is a sectional view taken along line AA of FIG. 7, and FIG. 8B is a sectional view taken along line BB of FIG. As shown in FIGS. 7 and 8, first, the lifting cylinder 30 is extended to raise the tundish 2 placed on the lifting beam 21. Then, the tundish car 1 is moved to the casting position I while the tundish 2 is raised, and the elevating cylinder 30 is contracted at the casting position I, and the immersion nozzle 4 of the tundish 2 is inserted into the mold M. At this time, since the tundish 2 can be vertically moved up and down together with the elevating beam 21 by the elevating cylinder 30, there is no fear that the immersion nozzle 4 and the mold M interfere with each other to damage the immersion nozzle 4 and the mold M.

If the molten metal is poured into the tundish 2 with the immersion nozzle 4 inserted in the mold M, the molten metal can be poured from the immersion nozzle 4 into the mold M.

When the pouring into the mold M is completed, the lifting cylinder 30 is extended to move the tundish 2 to the lifting beam 2.
If it is raised to 1, the immersion nozzle 4 can be pulled out of the mold M. At this time, the switching valve 71 is connected to the low pressure path f.
, The pressure applied to the piston-side oil chamber 43 of the tilt cylinder 40 becomes lower than at the time of tilt. Therefore, even if the tilting cylinder 40 extends, the lifting beam 2
Since the beam 1 is not tilted, the lifting beam 21 can be safely moved up and down. In addition, since the tilt cylinder 40 extends in synchronization with the lifting of the lifting beam 21, when the lifting beam 21 is raised by the lifting cylinder 30, the tilt cylinder 40
Is not a resistance.

When the immersion nozzle 4 is removed from the mold M, the tundish car 1
To the waste position II. When the tundish car 1 moves to the waste position, the tundish 2 is lowered by the elevating device 30.

As shown in FIG. 9, when the expansion / contraction switching valve 68 of the hydraulic circuit 60 is switched to the extension path a, the pair of left and right tilt cylinders 40, 40 is extended, and the pair of left and right lifting beams 2 are moved.
1 and 21 swing about one end attached to the upper end of the lifting guide 32 as a fulcrum, and the tundish 2 is tilted together with the lifting beam 21. Then, the remaining steel and slag in the tundish 2 are discharged to the pot P in the pit T. At this time, the tip end portion of the frame 11 of the carriage 10 is supported by the overturn prevention cylinder 56 provided on the casting floor F from below, thereby preventing the tundish car 1 from overturning due to the tilting of the tundish 2. .

When all the remaining steel and slag in the tundish 2 is discharged, the work table 50 is advanced to the work position while the tundish 2 is tilted. Then, the worktable 50
Approaches the lower surface of tundish 2, so tundish 2
The maintenance of the sliding nozzle 3 provided on the lower surface can be easily performed.

When the maintenance work of the sliding nozzle 3 is completed, the work table 50 is retracted to the retracted position, the expansion / contraction switching valve 68 is switched to the collecting path b, and the tilting cylinder 40 is contracted to return to the tundish 2. The waste work and the maintenance work of the tundish 2 are completed. Then, if the tundish car 1 is moved to the casting position I again, the casting operation can be performed.

[0038]

According to the first aspect of the present invention, since the tilting device moves together with the carriage, the equipment can be downsized, and the immersion nozzle and the mold are damaged when the immersion nozzle is inserted into the mold. Don't worry. According to the second aspect of the present invention, the tundish can be tilted together with the lifting beam, and the structure of the device becomes simple and compact. According to the third aspect of the present invention, when the lifting beam is raised, even if the tilt cylinder is extended, the lifting beam is not tilted, so that the lifting beam can be raised and lowered safely, and the lifting beam is raised by the lifting device. Sometimes the tilt cylinder does not become a resistance. According to the invention of claim 4, if the work table is advanced to the work position, maintenance such as a sliding nozzle provided on the lower surface of the tundish can be easily performed, and if the work table is retracted to the retracted position, it interferes with the casting operation. No.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of a tundish car 1 of the present embodiment.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a schematic front view of the tundish car 1 of the present embodiment.

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 1;

FIG. 5 is a sectional view taken along line VV of FIG. 2;

FIG. 6 is a schematic diagram of a hydraulic circuit 60 that operates the tilt cylinder 40.

FIG. 7 is a schematic view of a casting floor F of the continuous casting facility.

8A is a sectional view taken along line AA of FIG. 7, and FIG. 8B is a sectional view taken along line BB of FIG.

FIG. 9 is a schematic explanatory view of a state in which the tundish 2 is tilted.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tundish car 2 Tundish 10 Dolly 21 Elevating beam 30 Elevating device 40 Tilting cylinder 41 Cylinder body 42 Piston rod 43 Piston side oil chamber 50 Workbench 71 Switching valve F Casting floor

Claims (4)

[Claims] 1. A tundish car movable on a casting floor of a continuous casting facility, wherein said tundish car is provided with a carriage having moving means, an elevating beam on which the tundish is placed and raised and lowered, and a tundish which is horizontally movable. An elevating device for vertically elevating the elevating beam while maintaining the tilting device, and a tilting device for tilting the tundish at the time of discharging work,
The tundish car in a continuous casting facility, wherein the tilting device tilts the tundish together with the lifting beam. 2. An end of said elevating beam is swingably attached to said elevating device, and said tilting device is a tilt cylinder provided between said bogie and said elevating beam, 2. The continuity according to claim 1, wherein a cylinder body of the tilt cylinder is swingably mounted on the carriage, and a rod of the tilt cylinder is rotatably mounted on the lifting beam. Tundish car in casting equipment. 3. A switching valve for controlling a pressure applied to a piston-side oil chamber of the tilt cylinder, wherein the switching valve is used to control the tilt cylinder when the lifting beam is raised. The tundish car according to claim 1 or 2, wherein the pressure applied to the piston-side oil chamber is made lower than the pressure applied to the piston-side oil chamber of the tilt cylinder during tilting. 4. A work table is provided on the carriage so as to be able to move forward and backward, and when the tundish is tilted, the work table is advanced to a work position and the work is performed when the tundish is returned. 4. A tundish car in a continuous casting facility according to claim 1, wherein the table is retracted to a retracted position.