JPH07314103A - Tundish residual hot water discharge device for continuous casting - Google Patents

Abstract

(57) [Abstract] [Purpose] With a simple structure, good workability can be obtained, it can be installed in a narrow installation space, equipment cost can be reduced, and even if the rotating means of the rotating arm fails, (EN) Provided is a tundish residual hot water discharge device for continuous casting which can prevent the molten steel from flowing out by opening the lid by the static pressure of the molten steel in the tundish. [Structure] A rotating arm 17 arranged below the tundish 11 and rotating around a rotating shaft 14, and a residual hot water discharge port at the bottom of the tundish 11 attached to the rotating arm 17. A lid 13 for opening and closing 12, a rotating means 20 of the rotating arm 17, and a wedge member 2 capable of locking the rotating arm 17 when the cover of the residual hot water outlet 12 is closed.
And a locking means 25 with 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tundish residual hot water discharge device for continuous casting, and more specifically, it has a simple structure, provides good workability, can be installed in a narrow installation space, and has a low equipment cost. The present invention also relates to a continuous casting tundish residual hot water discharge device capable of preventing the molten steel from flowing out by opening the lid due to the static pressure of the molten steel in the tundish even if the turning means of the turning arm fails.

[0002]

2. Description of the Related Art In a tundish, for example, in a process of continuously casting molten steel into a slab, the molten steel from a ladle that has received the molten steel refined in a converter is accumulated and impurities such as non-metallic inclusions are floated up. At the same time, it is distributed for each strand. Therefore, in the case of two strands, the inside of the tundish is normally divided into three chambers in a plane by two weirs made of refractory, and a molten steel circulation hole is formed at the bottom of each weir. ing. Molten steel from the ladle is supplied to the center chamber, where non-metallic inclusions and the like float, and clean molten steel passes through the flow holes in the weirs on both sides and flows into the left and right chambers. By the operation, molten steel is supplied to a mold arranged below the tundish and continuously cast.

In continuous casting, when the molten steel in the ladle is lost and the molten steel in the tundish is reduced, there is a risk that non-metallic inclusions or slag will be supplied to the mold. Thus, the supply of molten steel to the mold is stopped and the process ends. After that, the tundish is moved by a trolley to the tundish maintenance area or preheating place while leaving the remaining hot water, and the remaining hot water in the tundish,
Non-metallic inclusions and slag are discharged. As a technique for discharging the residual hot water remaining in the tundish, a device disclosed in, for example, Japanese Utility Model Laid-Open No. 59-73061 is known. This is a siphon pumping out the residual hot water in the tundish.

[0004]

However, in the above-mentioned prior art, since the mechanism for pumping out the residual hot water in the tundish by the siphon is adopted as described above, a large siphon tube, its lifting mechanism and a vacuum system are provided. It was necessary, and there were problems in space, workability and equipment cost.

Therefore, tentatively, a residual hot water discharge port is formed at the bottom of the chamber in the center of the tundish, and the discharge port is arranged below the tundish, and the lid body is rotated by a fluid pressure mechanism. If the residual hot water in the tundish is discharged to the residual hot water pot by opening and closing by using it, it will be excellent in terms of workability, space, equipment cost and the like. However, in this device, the energization of the working fluid in the fluid pressure mechanism that opens and closes the rotary type lid during the operation of continuous casting is interrupted due to, for example, the stoppage of the fluid pump due to equipment failure or power failure. If the molten steel static pressure in the tundish pushes the lid open, the molten steel may flow out of the residual hot water discharge port and cause an accident. There were problems such as damage to the casting equipment.

The present invention has been made in view of the above circumstances, has a simple structure, provides good workability, can be installed in a narrow installation space, and can reduce equipment costs. It is an object of the present invention to provide a tundish residual hot water discharge device for continuous casting that can prevent the molten steel from opening due to the static pressure of the molten steel in the tundish to prevent the molten steel from flowing out even if the failure occurs.

[0007]

A method according to the above-mentioned object.
The tundish residual hot water discharge device for continuous casting described is arranged below the tundish, and is provided with a rotating arm that rotates about a rotating shaft, and a bottom part of the tundish attached to the rotating arm. A lid for opening and closing the remaining hot water outlet, a turning means for the rotating arm, and a locking means having a wedge member for locking the turning arm when the lid for the remaining hot water outlet is closed. Is configured.

A tundish residual hot water discharge device for continuous casting according to a second aspect is the tundish residual hot water discharge device for continuous casting according to the first aspect, wherein the rotating arm is
The drive means includes a drive side partial arm and a driven side partial arm as a center, and the rotating means is a cylinder in which a tip end portion of a rod is axially attached to the drive side partial arm, and the drive The side partial arm is provided with an abutting portion of the wedge member, and the locking means is attached to the iron skin of the tundish, and is configured like a cylinder capable of taking in and out the wedge member.

[0009]

In the tundish residual hot water discharging device for continuous casting according to claims 1 and 2, when the rotating arm is rotated in the opening direction by the rotating means about the rotating shaft, the inside of the tundish is opened. The remaining hot water is discharged from the residual hot water discharge port at the bottom of the opened tundish. On the other hand, even if the rotating means of the rotating arm or the lock operation system of the locking means does not work due to a power failure or the like, the wedge member is moved by the locking means to lock the rotating arm when the lid is closed. It is possible to prevent the molten steel from flowing out by the pressure suddenly opening the residual hot water discharge port.

[0010]

Embodiments of the present invention will now be described with reference to the accompanying drawings to provide an understanding of the present invention. FIG. 1 is a front view of a tundish residual hot water discharging device for continuous casting according to an embodiment of the present invention, and FIG. 2 is an enlarged cross-sectional view of the relevant part.

As shown in FIGS. 1 and 2, a tundish residual hot water discharge device 10 for continuous casting according to an embodiment of the present invention,
The tundish 11 has a lid 13 for opening and closing a residual hot water outlet 12 formed at the bottom of a central chamber partitioned into three chambers. Below the tundish 11, the rotating shaft 14
A rotating arm 17 composed of a driving side partial arm 15 and a driven side partial arm 16 which rotate about
The lid 13 having a refractory 18 stretched on its inner surface is fixed to the upper surface of the tip of the driven side partial arm 16.

The drive side partial arm 15 has a tip end of a rod 21 of a hydraulic cylinder 20, which is an example of a pivoting means pivotally supported on the side surface of the iron skin 19 of the tundish 11, which is pivotally attached. By putting 21 in and out,
The rotating arm 17 rotates about the rotating shaft 14, and the lid 13
Is attached to and removed from the lower portion of the cylindrical refractory block 22 attached to the residual hot water outlet 12. The hollow portion of the refractory block 22 is filled with silica sand 23. A thick contact portion 24 that rises in the vertical direction when the residual hot water outlet 12 is closed is fixed to the central portion of the drive side partial arm 15, and the locking means 25 is attached to the contact portion 24. The wedge member 26 that locks the rotating arm 17 can be contacted when the lid of the residual hot water outlet 12 is closed.

The locking means 25 has an air cylinder 27 fixed to the side surface of the iron skin 19, and a mounting member 30 which can be moved up and down along a vertically extending guide rod 29 at the tip of the rod 28. Is stuck. The wedge member 26 that moves up and down along a guide member 31 fixed to the side surface of the iron skin 19 is attached to the tip of the mounting member 30. The locking means 25 is configured by these components 26 to 31. Air cylinder 2
By moving the rod 28 of 7 in and out, the wedge member 26
Moves vertically along the guide rod 29 to come into contact with the contact portion 24 of the rotating arm 17 or release the contact state. Since the surface of the wedge member 26 on the side of the contact portion 24 is an inclined surface, the contact portion 2 does not rattle.
It can abut 4. In the figure, reference numeral 32 is a refractory material at the bottom of the tundish 11.

Next, the operation of the tundish residual hot water discharge device 10 for continuous casting according to one embodiment of the present invention will be described. Figure 1
As shown in FIG. 3, when the tundish 11 is used, the rod 21 of the hydraulic cylinder 20 is pulled in to rotate the rotating arm 17 around the rotating shaft 14 in the closing direction, and the remaining hot water outlet 12 is closed. The lid is closed by 13, and the molten metal is put into a ladle (not shown) for use. At this time, the rod 28 of the air cylinder 27 is projected to move the wedge member 26 downward, and the wedge member 26 is brought into contact with the contact portion 24 to lock the rotating arm 17,
For example, even if the hydraulic system of the hydraulic cylinder 20 or the pneumatic system of the air cylinder 27 does not operate due to a power failure or the like, the residual hot water discharge port 1 is suddenly caused by the static pressure of molten steel in the tundish 11.
There is no fear that molten steel will flow out when 2 opens and a major accident will occur.

During use, the tundish 11 is moved to a predetermined residual hot water discarding position by a trolley (not shown), and then the rod 28 of the air cylinder 27 is retracted to unlock the rotating arm 17. By protruding the rod 21 of the hydraulic cylinder 20 and rotating the lid 13 in the opening direction, the residual hot water accumulated in the central chamber of the tundish 11 is discharged from the residual hot water discharge port 12.

As described above, when the rotating arm 17 by the hydraulic cylinder 20 is rotated about the rotating shaft 14 in the opening direction, the residual hot water in the tundish 11 is discharged. Since it has a simple structure of being discharged from the outlet 12, good workability can be obtained, it can be installed in a narrow installation space, and the equipment cost can be reduced.

Although the present invention has been described above with reference to the drawings, the present invention is not limited to this embodiment, and even if there are design changes and the like without departing from the scope of the invention, the present invention is included. For example, in the embodiment, the structure of the rotating arm is not limited to that of the embodiment, but may have any structure. Further, in the embodiment, the hydraulic cylinder is adopted as the turning means of the turning arm, but the present invention is not limited to this, and the turning means having any other structure may be used. Further, in the embodiment, as the locking means, the sliding type using the air cylinder as the drive source is adopted, but the locking means is not limited to this, and any other locking means may be used. The point is that the wedge member that locks the rotating arm does not come off even if the locking means does not operate due to a power failure or the like.

[0018]

In the tundish residual hot water discharge device for continuous casting according to the first and second aspects of the present invention, when the rotating arm is rotated in the opening direction by the rotating means about the rotating shaft as described above. With a simple structure, the residual hot water in the tundish is discharged from the residual hot water outlet formed at the bottom of the opened tundish, so good workability can be obtained and it can be installed in a narrow installation space. It is possible to reduce the facility cost. Further, even if the rotating means or the locking means does not operate due to some cause such as a power failure, since the rotating arm is locked by the wedge member of the locking means when the lid is closed,
The static pressure of molten steel in the tundish prevents the residual molten steel from opening suddenly and causing the molten steel to flow out.

[Brief description of drawings]

FIG. 1 is a front view of a tundish residual hot water discharging device for continuous casting according to an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of the relevant part.

[Explanation of symbols]

 10 Tundish Remaining Hot Water Discharge Device for Continuous Casting 11 Tundish 12 Remaining Hot Water Discharge Port 13 Lid 14 Rotating Shaft 15 Drive Partial Arm 16 Driven Partial Arm 17 Rotating Arm 18 Refractories 19 Iron Skin 20 Hydraulic Cylinder 21 Rod 22 refractory block 23 silica sand 24 abutting part 25 locking means 26 wedge member 27 air cylinder 28 rod 29 guide rod 30 mounting bracket 31 guide member 32 refractory

Front Page Continuation (72) Inventor Kenzo Adachi 1-3-1 Makiyama, Tobata-ku, Kitakyushu, Fukuoka Hamada Heavy Industries Co., Ltd. (72) Hajime Mori 1-136 Makiyama, Tobata-ku, Kitakyushu, Fukuoka Hamada Heavy Industry Co., Ltd.

Claims (2)

[Claims] 1. A rotating arm which is arranged below the tundish and which rotates about a rotating shaft, and an arm attached to the rotating arm for opening and closing a residual hot water discharge port at the bottom of the tundish. For continuous casting, comprising: a lid, a turning means of the turning arm, and a locking means having a wedge member capable of locking the turning arm when the lid of the residual hot water discharge port is closed. Tundish residual hot water discharge device. 2. The rotating arm has a driving side partial arm and a driven side partial arm with the rotating shaft as a center, and the rotating means has a rod tip end portion on the driving side partial arm. A cylinder that is axially mounted, and in which the drive-side partial arm is provided with an abutment portion of the wedge member, and further, the locking means is attached to the iron skin of the tundish so that the wedge member can be taken in and out. The tundish residual hot water discharge device for continuous casting according to claim 1, wherein