JPS589706B2 - Refractory material spray nozzle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is suitable for the nozzle of a spray repair device that injects refractory material with compressed air for spray repair, and more specifically, is suitable for repairing furnaces such as pig iron mixers that have a small furnace opening and a long furnace length and are bent. This invention relates to a nozzle for spraying refractory materials.

To repair a damaged furnace, it is common practice to use a repair device for spraying refractory material, and spray the refractory material from the device onto the damaged furnace wall to repair the damaged area. Various mechanisms are used for repair equipment for this spraying work.

However, it is extremely difficult to repair the curved furnace surface of a furnace with a small furnace opening and a long furnace length, such as a pig iron mixer car, using a repair device equipped with a well-known mechanism.

In other words, in the cold process, workers enter directly into the furnace to perform the work, and while it is possible to repair every corner of the furnace by spraying, on the other hand, a large amount of dust is generated and the working environment is very poor, which poses health problems for the workers. There is a safety issue.

On the other hand, in hot conditions, spraying work is performed from outside the furnace, and due to the structure of conventional repair equipment and furnaces, the tip of the spray nozzle does not bend to every corner of the furnace, and it is not possible to visually observe the entire inside of the furnace from outside the furnace. Therefore, it is very difficult to obtain a sufficient spraying effect.

The present invention was made to solve all of the above-mentioned problems with the conventional spray repair equipment, and its purpose is to move a pipe formed in a curved shape in the axial direction along the curvature of the pipe. A nozzle that can move in all directions is attached to the tip of this pipe, and the curvature of the pipe allows the nozzle to penetrate deep into the furnace. It is an object of the present invention to provide a fireproofing material spray nozzle that can effectively carry out repairs.

Next, an embodiment of the present invention will be described in detail as follows based on the accompanying drawings showing one embodiment of the present invention.

In the figure, 1 is a pipe formed in a curved shape, and is movable in the axial direction along its curvature by a drive mechanism 2.
The drive mechanism 2 can freely pivot around the holding portion.

As shown in FIG. 3, the drive mechanism 2 includes an inner cylinder 5 rotatably assembled into an outer cylinder 3 via a bearing 4, and a pipe 1 attached to the inner cylinder 5.
A vertical hole 6 is bored through the vertical hole 6, and rollers 7 and 8 are attached to the bottom end of the inner cylinder 5 to hold the pipe 1 passing through the vertical hole 6 so as to be movable in the axial direction.

A rack 9 is fixed to the outer surface of the pipe 1 along the axial direction, and a pinion 10 attached to the output shaft is attached to the upper part of the inner cylinder 5.
is attached with a motor 11 that meshes with the rack 9, and forward and backward movement of the pipe 1 is imparted to the pipe 1 by forward and reverse rotation of the motor 11.

A gear 12 is formed on the outer peripheral surface of the upper end of the inner cylinder 5, and a motor 15 is attached to the outer surface of the outer cylinder 3, in which the gear 14 of the output shaft 13 meshes with the gear 12. This gives the entire body a turning motion around the inner cylinder 5.

A nozzle 16 is attached to the tip of the pipe 1, and a power transmission box 17 is provided to cover this attachment part.
A power box 18 is attached to the other end of the pipe 1, which has a double structure of an inner pipe 1a and an outer pipe 1b, and the space formed between the two pipes 1a and 1b is a cooling water passage 19.

The power transmission box 11 has an outer case 20 fixed to the outer pipe 1a and an inner case 21 fixed to the tip of the inner pipe 1a. This becomes a cooling chamber 22 that communicates with the other parts.

The upper end of the nozzle 16 is rotatably supported by a joint 23, and the upper end is connected to a material hose 24 passing through the inner pipe 1a, and a concentric shaft 25 protruding from the joint 23 is used for power transmission. It is rotatably supported by the box 17 via a bearing 26, and the tip of the pipe 1 can freely swing around the shaft 25 and rotate around the holding part at the joint 23.

The concentric shaft 25 may not only be provided protruding from the joint 23, but may also be provided on a steel pipe or the like disposed near the joint 23.

The mechanism that rotates the nozzle 16 includes a rotating shaft 2T and a set of gears 2 that mesh with the rotating shaft 27 in the power box 18.
A servo motor 29 is provided to provide rotation via a servo motor 8, and a flexible shaft 30 connected to a rotating shaft 27 is pulled out along the inside of the inner pipe 1a toward the distal end side.

A gear 31 is fixed to the outer peripheral surface of the upper end of the nozzle 16 facing into the power transmission box 17, and a rotating shaft 32 is attached to the outer surface of the joint 23, and the upper end of this rotating shaft 32 is connected to the tip of the flexible shaft 30. 31
A gear 33 meshing with the servo motor 29 is provided to transmit the rotation of the servo motor 29 to the nozzle 16.

The mechanism that swings the tip nozzle 16 is the power box 1.
An operating rod 34 is attached to the inside of the power box 18 so as to be able to swing freely around a shaft 35, and a worm gear 36 is provided at the end of the operating rod 34. A meshing worm 38 is attached, and the operating rod 34 is rocked by forward and reverse rotation of the motor 37.

The shaft 25 of the joint 23 that holds the nozzle 16 is provided with arm rods 39 that protrude toward opposite sides.
The nozzle 1
6.

Note that a hydraulic cylinder or the like may be used as the driving source for the swinging, or a wire drum may be used to operate the wire and the drum may be driven.

In the illustrated example, the pipe 1 is formed into a single arc shape, but it may also have a structure in which polygonal shapes are combined in order.
Although the pipe 1 has a water-cooled structure, in order to more effectively cool the inside of the power transmission box 17, a cooling air blowout pipe 41 is provided in the inner case 21.

This air cooling method includes cooling the entire pipe 1, and air is blown from the rear end of the power box 18, passed between the inner pipe 1a and the material hose 24, and directed toward the lower end opening of the power transmission box 17. It may also be made to squirt out.

(Not shown) That is, since the blow-off pipe 41 is used, air is passed between the inner pipe 1a and the material hose 24 for cooling.

The vertical movement of the pipe 1 as a whole is controlled by the installed rail 42.
A lifting beam 44 is provided on a moving frame 43 that moves along the vertical axis, and the lifting beam 44 is suspended on both sides by wires 47 pulled out from a winding machine 45 via a pulley 46, so that it can move up and down in a horizontal state. , a drive mechanism 2 for holding the pipe 1 is attached to the center of the lifting beam 44.

Incidentally, the lifting and lowering movement may be performed by a hydraulic cylinder, a screw motor, etc. In the illustrated case, the pipe 1 is inserted from the upper part of the furnace A, but it may be configured to be inserted from the side.

The present invention has the above-mentioned structure, and includes a television camera disposed in a movable holding device and a television receiver connected to the television camera in the spraying device operating section (these devices are equipped with a cooling mechanism as necessary). The spraying operation is performed by observing the inside situation of the furnace by installing the nozzle 16 in a manner such that the nozzle 16 faces the required spraying location.

These movements can also be automatically controlled.The situation inside the furnace is observed using a television camera and a receiver outside the furnace, and the points to be sprayed are determined using the coordinates of the position inside the furnace created in advance. This is stored in the storage section of the automatic pipe control device, and the movement of each part is controlled based on this.

When repairing furnace A, as shown in Figures 1 and 2,
With the nozzle 16 placed in the pipe 1 so as to be located directly above the furnace mouth of the furnace A, the motor 11 is started to insert the nozzle 16 into the furnace A, and the pipe 1 is rotated by the motor 15 to open the nozzle 16. The nozzle 16 is oscillated and rotated by the motors 29 and 37 to face the area to be repaired, and the refractory material sent through the material hose 24 is sprayed onto the inner peripheral surface of the furnace. .

As described above, in the present invention, a pipe formed in a curved shape is arranged so as to be movable in the axial direction along its curvature, and a nozzle is attached to the tip of the pipe so as to be movable in a desired direction. The curvature of the pipe allows the nozzle to penetrate deep into the furnace, making it possible to spray refractory material smoothly, easily, safely, and with less waste, even in curved furnaces with a small furnace opening and a long furnace length. becomes possible,
In addition, the tip of the pipe with the nozzle attached faces the correct location of the area to be sprayed, allowing for reliable spraying work.
The refractory material is efficiently attached to the furnace wall, and as a result, it has excellent effects such as improving the durability of the attached refractory layer.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional front view showing the usage state of the nozzle according to the present invention, Fig. 2 is a longitudinal sectional side view of the same, Fig. 3 is an enlarged longitudinal sectional view of the pipe drive mechanism portion in the same, and Fig. 4 is the same as the Fig. 3. FIG. 5 is a cross-sectional plan view of the power transmission box in FIG. 1... Pipe, 2... Drive mechanism, 16
...Nozzle, 17...Power transmission box, 18...Power box, 24...
material hose.

Claims (1)

[Claims] 1 A curved pipe is arranged so that it can move freely in the axial direction along its curvature, and a nozzle for spraying refractory material is installed at the tip of this pipe so that it can be moved in the desired direction. A nozzle for spraying fireproof materials characterized by: