JPS6337672Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention is used for spraying refractories when hot repairing damaged parts of furnace walls in large industrial furnaces such as blast furnaces, cupolas, and vertical lime kilns. This invention relates to a fishing support device for a nozzle body.

(Prior art) In a large industrial furnace such as the one described above, if the refractories on the furnace wall are worn out, such as partially falling off, the furnace must be completely stopped and the temperature has cooled down before a worker can return to the furnace. If you go in and repair it, it takes a long time to wait for the temperature to drop, and it also requires a lot of energy to raise the temperature after repair, which is extremely inefficient economically. Therefore, without lowering the temperature of the furnace, a nozzle body with a spray nozzle at the end of a long pipe is inserted into the furnace through an opening such as a manhole provided at the top of the side wall of the furnace, and the refractory is removed from the damaged area using the spray nozzle. A method of hot repair by spraying is used.

However, in this case, if only one end of the long pipe of the nozzle body is supported by a manhole, the nozzle body itself is long and bends under its own weight, causing breakage of the nozzle body, or it is difficult to stabilize the nozzle by facing the worn part. Since it is difficult to hold the nozzle body, the nozzle body is held by suspending it from a suitable position in the middle of the tube with a wire. However, since this wire is also stretched through the vicinity of the upper end of the manhole, the angle formed between the tube of the nozzle body and the wire is small, and it is not very effective. In particular, the further down the furnace the area that requires repair is, the steeper the slope of the nozzle body becomes. At the same time as the effect was lost, the nozzle body itself buckled due to the long nozzle body, and as a result, it was extremely difficult to repair the area below the furnace wall.

Therefore, the inventor of the present invention previously proposed a nozzle body suspension device in which the angle between the tube of the nozzle body and the wire is increased to stably hold the nozzle body. As shown in FIG. 3, this fishing support device consists of an arm 1 that holds a pulley 18 at its tip and plunges into the furnace.
One or more pulley holding jigs having a number 9 are rotatably pivoted to the upper edge 4a of the flange 4 of the manhole, and one end of which is fixed at an appropriate position of the pipe of the nozzle body 5 inserted into the furnace. The wire 10 is suspended through a pulley 18 at the tip of the arm.
(For details, refer to Utility Model Application Publication No. 60-78000.) By using this device, it has become possible to spray quite deep inside the furnace, but some problems still remain in terms of operability, etc. was.

The present invention provides a suspension device for a nozzle body for hot spray repair of industrial furnaces that has been improved to solve the above problems, improve operability, and reduce the number of required workers. be.

(Configuration of the device) This device comprises a nozzle body suspension device which has a pulley at one end protruding into the furnace and an operating handle at the hand part, supports one end of the nozzle body, and is pivotally attached to the lower edge of the flange of the manhole near the hand part so that the entire device can rotate freely horizontally, and at least one nozzle body suspension wire which has one end fixed to an appropriate position on the nozzle body inserted into the furnace and extends via the pulley to an operating part such as a winch.

(Function) The nozzle body hanging and swinging device itself can be swung by holding the handle, making it extremely easy to operate even with long nozzle bodies that are heavier than before, and even with relatively small manholes. The inclination of the nozzle body can be increased, allowing spraying to deeper parts.

(Example) Hereinafter, an example will be described in detail with reference to the drawings. FIG. 1 shows an embodiment of the present invention, in which 1 is an industrial furnace and 2 is its inner wall, which is made of refractory material. 3 is a location where the fireproof wall is damaged and requires repair. 4 is a manhole installed at the top of the side wall of the furnace,
Reference numeral 5 denotes a nozzle body inserted into the furnace through a manhole 4, and a spray nozzle 6 is provided at the tip of a long pipe.
At the time of repair, the refractory is transported through this together with compressed air and sprayed from the spray nozzle 6 for spraying work. 7 is a nozzle body hanging and swinging device according to the present invention;
As shown in an enlarged view in FIG. 2, it has a pulley 8 at one end protruding into the furnace, and an operating handle 9 at its hand, supporting one end of the nozzle body 5 so that the whole body can be moved horizontally. It is pivotally attached to a bearing box 13 fixed to the lower edge 4b of the flange of the manhole 4 near the hand portion so as to be rotatable. 11 is a chain block or hitch parer, 1
2 is a light that illuminates the repaired area. 10 is
At least one nozzle body suspension wire has one end fixed to a suitable position of the nozzle body 5 inserted into the furnace, and extends through a pulley 8 to an operating part such as a winch. Note that 14 is a roller installed on the upper edge 4a of the flange of the manhole.

When performing spray repair using the nozzle body suspension device constructed as described above, as shown in Fig. 2, a worker stands on a scaffold built outside the manhole and operates the operating handle 9. By rotating the nozzle body swinging device 7 and adjusting the length of the wire 10 and the hitch lever 11, the spray nozzle 6 at the tip of the nozzle body is made to face the area requiring repair. Then, the refractory is spouted out while swinging the nozzle body hanging and swinging device 7 from side to side to carry out spraying work.

Comparing this embodiment configured as described above with the conventional example shown in Fig. 3, it is found that in the conventional example, in order to swing the spray nozzle, the nozzle body 5 had to go out of the manhole itself. The worker holds the part and swings it.
Therefore, the arm part 19 suspending the wire 10 rotates in a manner that follows the arm part 19, but in this embodiment, the nozzle body 5 and the pulley 8 are mounted on the nozzle body suspension swinging device 7. Therefore, the spray nozzle can be easily swung simply by operating the handle without waving the hand to the nozzle body 5.

In the conventional model, the nozzle body 5 is operated by a worker holding it, so the part of the nozzle body that extends outside the manhole must also be extended long. When attempting to enter the furnace, the part that protruded outside the manhole hit the upper edge of the manhole, making it impossible to tilt it, making it difficult to repair deeper parts of the furnace. On the other hand, in this embodiment, the nozzle body 5
The outside part of the manhole can be shortened,
Since the bendable hose 15 is connected to the end, the nozzle body 5 can be tilted significantly, allowing deeper spray repair. In addition,
The length of the nozzle body 5 can be adjusted by adding or removing pipes.

In the conventional example, the heavy and long nozzle body 5 is swung by holding the part protruding from the manhole, and three to four workers are required to operate the nozzle body 5. However, in the case of this embodiment, only one worker is required to operate the handle, and the swing can be easily made, resulting in a significant labor saving.

In the conventional system, illumination was provided from another manhole, but in this embodiment, the illumination light 12 is provided as ancillary equipment by the nozzle body hanging swing device 7.
Since the repair site can be installed anywhere, and the operator moves it himself, he can clearly see the repair area and carry out reliable work.

(Effects of the invention) As explained above, according to the invention, the nozzle body can be stably supported, and the spray nozzle can be swung by only one worker operating the handle. Moreover, it has remarkable effects such as being able to reliably perform spraying work to the deep part of the furnace.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is an enlarged view of the same essential parts, and FIG. 3 is a block diagram of a conventional example. 1... Industrial furnace, 3... Area requiring repair, 4... Manhole, 5... Nozzle body, 6... Spraying nozzle, 7
...Nozzle body hanging swing device, 8... Pulley, 9...
Operation handle, 10...Wire, 11...Chain block or hitch lever, 12...Light, 1
3...Bearing box, 14...Roller.

Claims (1)

[Scope of utility model registration request] A long nozzle body equipped with a spray nozzle at the tip of a pipe is inserted into the furnace through a manhole installed at the top of the side wall of an industrial furnace such as a blast furnace, and the refractory is spouted from the spray nozzle to the damaged areas on the furnace wall. A device for hot spraying repair, which has a pulley at one end protruding into the furnace and an operating handle at the hand;
and a nozzle body suspension swinging device that supports one end of the long nozzle body and is pivotally attached to the lower edge of the flange of the manhole near the hand portion so that the entire body can freely rotate in a horizontal direction; The tube of the nozzle body and the nozzle body suspension wire have one end fixed to an appropriate position of the inserted nozzle body and extend through the pulley to an operating section such as a winch. 1. A suspension device for a nozzle body for hot spray repair of an industrial furnace, characterized in that the nozzle body is suspended by increasing the angle formed between the two.