JPH08278086A - Projection repair method and device - Google Patents

Abstract

(57) [Summary] [Purpose] It is possible to make sure that repairing refractories can be adhered to and repaired at any point. [Structure] The refractory A for repair is filled in the projection tube 1, and compressed air is pumped from a compressed air supply source 4 connected to the projection tube 1 to obtain the refractory A for repair in the projection tube 1. A projection repairing method and device characterized by projecting toward a repaired part and adhering a refractory to the damaged part for repairing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refractory projection repairing method and apparatus for repairing a damaged portion of a refractory lining of a molten metal container such as a furnace wall inner refractory or a tundish.

[0002]

2. Description of the Related Art In various furnaces, a patching material is applied from the outside when the refractory material forming the furnace wall is locally damaged or when repairing a damaged portion of the refractory material lining a large molten metal container. , Repairable refractory such as castable (hereinafter referred to simply as refractory for repair) is supplied to the damaged portion and adhered to the repaired portion.

Conventionally, the above-mentioned repairing means is generally a human repair in which a refractory is manually thrown at a damaged portion, or an inclined chute is used, and means for supplying the refractory to the damaged portion through the chute and adhering the refractory to the damaged portion is generally used. It is used.

[0004]

However, with the above-mentioned human means, it is extremely difficult to accurately hit the desired repaired portion, high skill is required, and it is difficult to throw or to throw. In the case of distance, it was extremely difficult to hit.

Further, in the latter type of chute, since the refractory is slid and supplied to the damaged portion due to the inclination of the chute, there is no momentum, and it is difficult to reliably attach the refractory, and at the high position and It was not possible to repair long-distance areas.

In view of this, it is an object of the present invention to provide a projection repairing method and a device therefor capable of accurately attaching and repairing a refractory material in repairing any portion.

[0007]

As a means for solving the problems of the above-mentioned conventional technique, the present invention fills a refractory material for repair in a projection tube, and a compressed air supply source connected to the projection tube is used. It is a projection repair method characterized in that a refractory for repair in the projection tube is projected toward a repaired portion by the pressure of compressed air, and the refractory is attached to a damaged portion for repairing.

According to a second aspect of the present invention, there is provided a projection tube, a refractory material filling mechanism for supplying a predetermined amount of refractory material for repair to the projection tube, and a compressed air supply source connected to a rear portion of the projection tube through a hose. A projection repairing device characterized by comprising:

According to a third aspect of the present invention, the projection tube is supported on a base so as to be rotatable in horizontal and vertical directions.

In order to achieve the above object better, the tip of the projection tube is formed in the lower part of the hopper for filling the refractory material for repair so that it can be moved in and out by an advancing / retreating drive mechanism. A nozzle is connected to the side opposite to the side where the projection tube is inserted to allow the tip of the projection tube to enter the nozzle, and a shutter for opening and closing the inner end of the nozzle is provided at the inner end position of the nozzle to project. The refractory entering the lower part of the hopper when the tube is retracted is taken into the projection tube by advancing the projection tube, and the refractory is projected through the nozzle by compressed air, and the filling of the refractory for repair. At the position, a tubular body having a filling opening with an upper half cut out is fixed, and the projection tube of the tubular body is inserted into the tubular body by an advancing / retreating drive mechanism. On the other side A slur is provided, and a filling cylinder that can be fitted into the cylindrical body as closely as possible from the filling opening is provided, and the filling cylinder is filled with a refractory material for repair and then loaded from the filling opening. The projection tube is moved forward so that the tip of the projection tube is brought into close contact with the end of the filling cylinder and the filling cylinder and the nozzle are brought into close contact with each other so that the refractory in the filling cylinder is projected from the inside of the nozzle by the pressure of compressed air.

Further, a sixth aspect of the present invention is to attach a vibrator to the nozzle so as to vibrate the refractory material therein to prevent sticking of the refractory material.

[0012]

The refractory material for repairing, which is filled at the tip of the projection tube, is projected from the tip thereof by the compressed air pressure-fed from the compressed air supply source into the projection tube. Therefore, by aiming and projecting the direction of the projection tube to the repaired part, the refractory can be properly attached to the damaged part to be repaired.

In this case, if the projection tube is rotatably supported in the horizontal direction and the vertical direction as claimed in claim 3, the refractory can be freely projected onto the repaired portion by this, and the aim can be more accurately achieved. It is possible to increase the hit rate.

According to the fourth aspect, the refractory in the lower part of the hopper, which is always filled from the hopper, is cut out by a certain amount by the forward movement of the projection tube, and the refractory can be projected by compressed air. Further, according to claim 5, it is possible to separately fill the filling cylinder with the refractory and drop it into the cylindrical body through the filling opening of the cylindrical body, and advance the projection tube to project the refractory by compressed air. it can. Further, when a vibrator is attached to the nozzle as in claim 6, vibration is applied to the refractory and the refractory is prevented from sticking to the inner surface of the projection tube, so that the entire amount of refractory can be reliably projected. it can.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in the drawings.

FIG. 1 shows the entire side surface of an embodiment of the present invention, and the main configuration is a projection tube 1 and a refractory material for filling the projection tube 1 with a predetermined amount of refractory material for repair. It is composed of a mechanism 2 and a compressed air supply source 4 connected to the projection tube 1 via a hose 3.

The projection tube 1 and the refractory filling mechanism 2 in FIG. 1 are installed on a table 5. This table 5
Is pivotally supported by a shaft 9 on a rotary table 8 rotatably supported on the upper end of a column 7 of a base 6 so that the projection tube 1 is tilted up and down, and by a tilting cylinder 10. It is designed to be laid down.

The rotary table 8 is adapted to be rotated by driving the motor 12 by engaging a gear 11 provided on the outer periphery thereof with a gear 13 of a motor 12 supported by the column portion 7. . Therefore, the direction of the table 5 in the horizontal plane and the elevation angle are selected by the rotation of the motor 12 and the operation of the tilting cylinder 10, and the projection direction of the projection tube 1 can be arbitrarily set. This projection tube 1 has 2
A 5 mm to 125 mm tube is used, and it is preferable to use a 25 to 80 mm tube considering that the refractory for repair is soft.

The projection tube 1 and the refractory filling mechanism 2 are
As shown in the enlarged cross-section of the relevant portion in FIG. 2, the tip 1a of the projection tube 1 is so constructed as to cross the inside of one side of the hopper lower portion 15 of the base portion of the hopper 14 for filling the refractory material.
A nozzle 17 is connected to the lower part of the hopper 15 in the forward direction of the projection tube, and the tip 1a of the projection tube 1 can be inserted into the nozzle 17 as tightly as possible.

A shutter 18 is provided at the inner end of the nozzle 17.
Is provided. This shutter 18 is used for the table 5
The shutter driving cylinder 19 installed at the lower part moves downward from the closed position shown in FIG. 2 and moves up and down over the position where the inner end of the nozzle 17 is released.

In the projection tube 1, guides 20, 20 provided on the outer periphery of the projection tube 1 are fixed between a support portion 21 of the table 5 and the hopper lower portion 15 to form guide rods 22, 2.
The projection rod 1 is slidably fitted into the projection tube 1 and is movable back and forth. The guide rod 20 of the projection tube 1 has a piston rod of a projection tube moving cylinder 23 as an advance / retreat drive mechanism that is fixedly installed on a side portion of the hopper lower portion 15. 24 is connected to the cylinder 23
By the operation of, the tip 1a of the projection tube 1 is moved into the nozzle 17 or moved out of the lower portion of the hopper 15.

A vibrator 25 is attached to the nozzle 17, and when the tip 1a of the projection tube 1 is inserted into the nozzle 17, the projection tube 1 is vibrated through the nozzle 17,
The refractory material in the projection tube 1 is prevented from sticking to the inner surface of the projection tube 1 and causing defective projection.

As the compressed air supply source 4, an air tank 26 is used in the illustrated embodiment, and a compressor (not shown), a pressure reducing valve 27, and a stop valve 2 are used in this air tank 26.
The air tank 26 and the rear end of the projection pipe 1 are connected by a hose 3 with an opening / closing valve 30 interposed therebetween. When the projection distance is 100 mm to 500 mm assuming spraying, the pressure inside the air tank 26 is 0.2 to 0.5 kg because the refractory material is soft.
/ Cm ² is sufficient. When the projection distance is ² m to ⁴ m, the pressure in the air tank 26 is set to about 0.5 to ⁵ kg / cm ² . If the pressure is higher than this, the refractory for repair once adhered is blown off, which is not preferable, and it is desirable to set the pressure so that the refractory for repair can reach the target repaired portion. Reference numeral 31 is a pressure gauge, and 32 is a drain valve. Further, in FIG. 1, reference numeral 33 is a vibrator attached to the side surface of the hopper 14 for vibrating the hopper 14 to smoothly lower the refractory material for repair in the hopper 14,
34, 34 are wheels (casters) for facilitating the movement of the base 6.

Next, the operation of the above embodiment will be described.

While the refractory material for repair is filled in the hopper 14 in advance, the piston rod 24 of the cylinder 23 is extended and the projection tube 1 is retracted, and the shutter 18 is raised by the cylinder 19 to raise the nozzle 17. Keep the inner end closed.

Prior to the projection of the refractory for repair, the direction of the table 5 and the elevation angle are determined by rotating the motor 12 and operating the tilting cylinder 10 so that the nozzle 17 faces the damaged portion.

Next, when the rod 24 of the cylinder 23 is shortened and the projection tube 1 is moved forward (to the right in FIG. 1), the tip 1a thereof moves across the hopper lower portion 15 of the hopper 14 and stops immediately before the shutter 18. The shutter 18
After lowering, move forward and stop. During that time, the refractory material for repair in the lower portion 15 of the hopper is clogged in the projection tube 1.
The amount is only that the projection tube 1 crosses the hopper lower part 15. The projection tube 1 further advances, and its tip 1a enters the nozzle 17 and stops. At this time, the vibrator 25
Is driven to vibrate the nozzle 17, and the vibration propagates to the projection tube 1 inserted into the nozzle 17 as closely as possible, so that the refractory for repair inside thereof sticks to the inner peripheral surface of the projection tube 1. Prevent that.

Next, when the on-off valve 30 is opened and compressed air is supplied, the pressure acts on the refractory material for repair in the projection tube 1 from the rear end of the projection tube 1, and the refractory material vigorously emerges from the tip of the nozzle 17. It is projected and collides with a damaged portion that needs repair and adheres to it, completing the repair.

When one repairing operation is completed, the on-off valve 30 is closed, the piston rod 24 of the cylinder 23 is extended and the projection tube 1 is retracted (to the left in FIG. 1), and its tip 1a is moved from the lower portion 15 of the hopper. While stopping at the point of leaving, the shutter 18 is raised by the cylinder 19 and the inner end of the nozzle 17 is closed. After that, the damaged portion requiring the next repair is repaired by the same procedure as described above.

FIG. 3 shows another embodiment of the filling mechanism 2 for the refractory material for repair, in which the tubular body 35 is horizontally fixed on the table 5, and a part of the tubular body 35 is fixed. It has a filling opening 36 opened by cutting out the upper half portion, the tip 1a of the projection tube 1 is inserted into the rear portion of this tubular body 35, and the nozzle 17 is connected to the front end of the tubular body 35. A sealing material 37 is provided on the outer periphery of the tip of the projection tube 1.

A filling cylinder 38 is provided which fits into the cylindrical body 35 through the filling opening 36 of the cylindrical body 35 as closely as possible. The filling cylinder 38 is made of a cylindrical member whose both ends are opened, and a hanging hand 39 is provided on the outer surface thereof. The inside diameter of the filling cylinder 38 is substantially the same as the inside diameter of the nozzle 17, and the projection tube 1 has the same diameter. The size is such that the sealing material 37 at the tip is closely joined. A sealing material 37 'is provided on the nozzle 17 side so that the end surface of the filling cylinder 38 is brought into close contact with it.

Since the other structure is the same as that of FIG.
The same members as these are given the same reference numerals, and the description thereof will be omitted.

Therefore, in this embodiment, the projection tube 1 is retracted to the position shown in FIG.
After filling the refractory A for repair as shown in FIG. 3, the filling cylinder 38 is inserted from the filling opening 36 of the cylindrical body 35 to the cylindrical body 35.
Drop it in as indicated by the white arrow.

Then, as in the above-described embodiment, the cylinder 23
When the projection tube 1 is moved forward (to the right in FIG. 3) by actuating, the sealing material 37 is closely attached to the left end of the filling cylinder 35, and the right end of the filling cylinder 35 is the sealing material 3 at the inner end of the nozzle 17.
Stick to 7 '. Here, the vibrator 17 is actuated to vibrate the projection tube 1, the direction of the nozzle 17 is determined in the same manner as in the above-described embodiment, and compressed air is pumped into the projection tube 1 so that the repair refractory A is discharged to the nozzle 17. It is possible to carry out repairs by projecting from where it is needed. In this case, the projection is smoothly performed by applying a lubricant such as mortar or the like having a fine powdery composition such as mortar to the inner peripheral surface of the filling cylinder 38 or filling a soft refractory near the inner peripheral surface of the filling cylinder 38. be able to.

[0035]

As described above, according to the present invention, a projection tube is used and the refractory material for repair filled in the projection tube is projected by utilizing the pressure of compressed air to adhere to the repaired portion. Since the refractory for repair can be reliably attached to the damaged part because it is done by repairing it, and by selecting the direction of the projection tube and projecting it with pressure, the part to be repaired is high or long distance. Even if it is, repair is possible and the refractory for repair does not come off.

[Brief description of drawings]

FIG. 1 is an overall side view showing an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of a filling portion of the refractory material for repair in FIG.

FIG. 3 is a partial cross-sectional side view showing another embodiment of the refractory filling portion for repair.

[Explanation of symbols]

 1 Projection Tube 2 Refractory Filling Mechanism 4 Compressed Air Supply Source 5 Table 6 Base 8 Rotary Table 10 Tilt Cylinder 12 Motor 14 Filling Hopper 15 Lower Hopper 17 Nozzle 18 Shutter 19 Shutter Drive Cylinder 20 Guide 22 Guide Rod 23 Projection Pipe moving cylinder 25,33 Vibrator 26 Air tank 35 Cylindrical body 36 Filling opening 37,37 'Sealing material 38 Filling cylinder

 ─────────────────────────────────────────────────── ─── Continuation of the front page (71) Applicant 000001199 Kobe Steel, Ltd. 1-3-18 Wakihama-cho, Chuo-ku, Kobe, Hyogo Prefecture (71) Applicant 000001971 Shinagawa White Brick Co., Ltd. 2 Otemachi, Chiyoda-ku, Tokyo 2-2-1 (72) Inventor Yoshikatsu Furuno 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nihon Kokan KK (72) Inventor Noboru Murakami 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nippon Steel Pipe Co., Ltd. (72) Inventor Naohiko Murakami 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nihon Steel Pipe Co., Ltd. (72) Inventor Masahiro Ariyoshi 1-chome, Mizushima Kawasaki-dori, Kurashiki City, Okayama Prefecture (No street number) Kawasaki Steel Co., Ltd. Mizushima Steel Works (72) Inventor Masao Minamibu 1-chome, Mizushima Kawasaki Dori, Kurashiki City, Okayama Prefecture (No house number) Kawasaki Steel Co., Ltd. Mizushima Steel Works In (72) Inventor Kubo ▲ Kichi ▼ 1 Minato 1850, Wakayama, Wakayama Sumitomo Metal Industries Co., Ltd.Wakayama Steel Works (72) Inventor Yasushi Satake 1850 Minato, Wakayama, Wakayama Sumitomo Metal Industries, Ltd. Inside the Wakayama Works (72) Inventor Akira Ote No. 1 Kanazawa-machi, Kakogawa City, Hyogo Prefecture Kamido Steel Works Co., Ltd. Inside the Kakogawa Works (72) Inventor Okazaki Toshiyuki Kanazawa-machi, Kakogawa City, Hyogo Prefecture Kamido Steel Co., Ltd. Tokoka Furukawa Works (72) Inventor Shingo Nonaka 2-2-1 Otemachi, Chiyoda-ku, Tokyo Inside Kawashiro Brick Co., Ltd. (72) Masashi Mori 2-chome, Otemachi, Chiyoda-ku, Tokyo No. 1 product within Kawashiro Brick Co., Ltd.

Claims (6)

[Claims] 1. A refractory material for repairing is filled in a projection tube, and the refractory material for repairing in the projection tube is projected toward a repair-required location by compressed air from a compressed air supply source connected to the projection tube, A projection repair method, which comprises repairing a refractory by attaching it to a damaged part. 2. A projection tube, a refractory filling mechanism for supplying a predetermined amount of refractory for repair to the projection tube, and a compressed air supply source connected to a rear portion of the projection tube via a hose. A projection repairing device characterized in that 3. The projection repair apparatus according to claim 2, wherein the projection tube is supported by a base so as to be rotatable in horizontal and vertical directions. 4. A tip of the projection tube is formed in a lower part of a hopper for filling a refractory material for repair so as to be movable in and out by a forward / backward drive mechanism, and a nozzle is provided on a lower part of the hopper opposite to a side where the projection tube is inserted. Is connected to allow the tip of the projection tube to enter the nozzle freely, a shutter is provided at the inner end position of the nozzle to open and close the inner end of the nozzle, and a refractory that enters the lower part of the hopper when the projection tube is retracted The projection repair apparatus according to claim 2 or 3, wherein a certain amount of refractory material is taken into the projection tube by forward movement, and the refractory material is projected through the nozzle by compressed air. 5. A cylindrical body having a filling opening with an upper half cut out is fixed at a filling position of the refractory for repair, and the projection tube is inserted into the cylindrical body by an advancing / retreating drive mechanism. A nozzle is provided on the side of the tubular body opposite to the side where the projection tube is inserted, and a filling barrel that can be fitted into the tubular body through the filling opening as closely as possible is provided. After filling the filling cylinder with the refractory material for repair, load it from the filling opening, move the projection tube forward to bring the tip into close contact with the end of the filling cylinder, and bring the filling cylinder and nozzle into close contact with the refractory material in the filling cylinder. The projection repair apparatus according to claim 2 or 3, wherein the projection is performed from inside the nozzle by the pressure of compressed air. 6. The projection repair apparatus according to claim 2, wherein a vibrator is attached to the nozzle to vibrate the refractory inside.