JPS6326173B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a repair machine for a vacuum degassing RH furnace, etc.

A vacuum degassing container for degassing molten metal produced in a steelmaking furnace such as a converter (1973)
The repair machine described in No. 56322 has a device for lining the inner and outer surfaces of a suction pipe and crushing and removing slag. However, according to the configuration of these devices, when repairing, for example, an RH furnace that has two flow pipes, a suction pipe and a discharge pipe, after the repair of one flow pipe is completed, the inner and outer surface lining devices and the slag Because the cart must be moved to bring the crushing removal device directly under the other flow pipe, there are problems with mobility and workability, and it is also equipped with a television camera device to monitor the work status inside the RH reactor. do not have.

In view of the above-mentioned problems, the present invention has a rotatable turntable on which various repair devices and a television camera device are mounted on an upper frame that can be raised and lowered, thereby making it possible to quickly and reliably carry out various repair work. The purpose is to provide equipment for repairing furnaces, etc.

The present invention installs a turntable under the RH furnace, and integrally mounts repair devices each having different functions on the turntable, such as a lining device, an attached slag removal device, a television camera device, and a press-fitting device. This invention relates to a repair machine for an RH furnace, etc., which is characterized in that a desired repair device is placed opposite the suction pipe and discharge pipe of the RH furnace as the turntable rotates.

An example in which the present invention is applied to an RH furnace will be described below with reference to the drawings.

A plurality of hydraulic cylinders 6 with built-in supports are erected on a trolley 5 that freely moves on rails 3 directly below the RH furnace 4 via wheels 2 driven by a hydraulic motor (not shown). An upper frame 7, which is moved up and down by the fluid pressure cylinder 6, is fitted into the fluid pressure cylinder 6. Furthermore, a rotatable turntable 9 having a rotational drive device 8 is attached to the upper surface of the central portion of the upper frame 7. On this turntable 9 are an inner surface spraying machine 10 for lining the inner surface of the RH furnace 4 and the suction pipe 4A or the discharge pipe 4B with refractory material, and an outer surface spraying machine for lining the outer surface of the suction pipe 4A or the discharge pipe 4B. 11 and
A television camera device 12 that monitors the lining condition on the inner surface of the RH furnace 4, and a suction pipe 4A or a discharge pipe 4
A slag removing device 13 for removing slag adhering to the outer surface of the pipe B is integrally mounted and arranged on a concentric circle with substantially the same pitch as the center pipe distance of the suction pipe 4A and the discharge pipe 4B.

The inner surface spraying machine 10 and the outer surface spraying machine 11 have an RH furnace 4 and a suction pipe 4A or a discharge pipe 4 at the upper end.
Inner and outer surface lining pipes 14A and 14B having injection ports directed toward the inner wall of B and the outer wall of the suction pipe 4A or the discharge pipe 4B, and the inner and outer surface lining pipes 14A and 14B are fitted into the center, and the inner and outer surface linings are Lifting rotation drive device 1 that lifts, lowers, and rotates the pipes 14A and 14B separately
5A and 15B. The inner lining pipe 14A is connected to the lifting rotation drive device 1.
A straight pipe extending straight upwards through 5A,
Further, the outer surface lining pipe 14B has a straight pipe whose lower end extends straight upward via the lifting rotation drive device 15B, and a pipe whose upper end is bent so as to revolve around the outer peripheral surface of the suction pipe 4A or the discharge pipe 4B. It is made up of

The slag removal device 13 includes a rotatable cutter table 17 having a rotary drive device 16 at the bottom thereof.
A cutter piece 18 is erected on the cutter table 17 and is formed to surround the outer peripheral surface of the suction pipe 4A or the discharge pipe 4B in an arc shape. The cutter piece 18 moves up and down the outer peripheral surface of the suction pipe 4A or the discharge pipe 4B as the upper frame 7 goes up and down, and also rotates around the suction pipe 4A or the discharge pipe 4B due to the rotation of the cutter table 17. is configured to do so. Further, a moving device 19 is arranged on the cutter table 17 in communication with the cutter piece 18 and for moving the cutter piece 18 in the radial direction.

The television camera device 12 has an RH furnace 4 at its upper end.
and a cable pipe 22 which has a television camera 20 directed toward the inner wall of the suction pipe 4A or the discharge pipe 4B, and has a cable 21 penetrated therein which is connected to a television receiver (not shown); and this cable pipe 22. It has an elevating rotation drive device 23 that is fitted into the center of the cable pipe 22 and moves the cable pipe 22 up and down and rotates it.

The embodiment of the present invention has the above configuration, and first, the trolley 5
to bring the entire repair machine directly below the RH furnace 4. Next, the support built-in hydraulic cylinder 6 is operated to raise the upper frame 7 to a predetermined position, and the upper end injection ports of the inner and outer lining pipes 14A and 14B are brought to the vicinity of the lower ends of the suction pipe 4A and the discharge pipe 4B, respectively. . Then, while the inner and outer lining pipes 14A and 14B are rotated and raised by the respective elevating rotation drive devices 15A and 15B, spraying of refractory material on the inner and outer surfaces of the suction pipe 4A and the discharge pipe 4B is performed simultaneously or separately on the inner and outer surfaces. . Also
When repairing only the inner surface of the RH furnace 4, the turntable 9 is rotated by the rotary drive device 8, and the inner lining pipe 14A is attached to the lower end of either the suction pipe 4A or the discharge pipe 4B, and the inner lining pipe 14A is attached to the lower end of the other. The television camera 20 is brought to
4A and the cable pipe 22 are inserted into the RH furnace 4, the inner lining pipe 14A and the cable pipe 22 are further rotated and raised, and spraying is performed while monitoring with the television camera 20. Furthermore, the turntable 9 is rotated periodically in the same manner as described above to bring the slag removing device 13 to the lower end of the desired suction pipe 4A or discharge pipe 4B, and then the cutter piece 18 is moved by the radial direction moving device 19 to move the cutter piece 18. 18 is brought to a position that aligns with the desired peeling point on the outer circumferential surface of the suction pipe 4A or the discharge pipe 4B, and the support-built-in hydraulic cylinder 6
The adhering slag is peeled off by using the upward movement of the upper frame 7, and then the upper frame 7 is lowered by the cylinder 6, and then the cutter table 17 is further rotated by the rotary drive device 16 to remove the cutter pieces 18 by the required amount. It is rotated, and then the upper frame 7 is raised to peel off the slag one after another in the same manner as described above. Also, external spray machine 1
As an alternative to 1, a press-fitting device for crimping a refractory material onto the outer wall of the suction pipe 4A or the discharge pipe 4B may be installed on the turntable 9.

The present invention, which operates even with the above configuration, has the following effects.

(1) Various repair work can be performed quickly and reliably by simply rotating the turntable.

(2) The type and size of the repair device mounted on the turntable can be freely selected depending on the content of the repair work, and optimal repair can be performed.

(3) Since the upper frame moves up and down, the slag removal device can have sufficient removal power.

[Brief explanation of the drawing]

FIG. 1 is a front view of an embodiment of the RH furnace repair machine according to the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a side view. 5: Dolly, 7: Upper frame, 9: Turntable,
10: Internal surface spraying machine, 11: External surface spraying machine, 12: Television camera device, 13: Slag removal device.

Claims (1)

[Claims] 1. A turntable is installed under the RH furnace, and repair devices each having different functions, such as a lining device, an attached slag removal device, a television camera device, and a press-fitting device, are integrally mounted on the turntable, and the turntable is With the rotation of
A repair machine for RH furnaces, etc., characterized in that a desired repair device is placed opposite the suction pipe and discharge pipe of the RH furnace.