JPH0679687B2 - Spray nozzle swivel device and refractory spray device using the same - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spray nozzle swivel device for swinging or swiveling a spray nozzle with respect to a spray object, and a refractory spray device using the spray nozzle swivel device.

[0002]

2. Description of the Related Art In a large-scale industrial furnace such as a blast furnace, a cupola, a vertical lime calcination furnace, etc., when the refractory on the furnace wall is worn out by being partially dropped off, the furnace is completely stopped and the temperature is lowered. If a worker enters the furnace for repair, a long waiting time is required while the temperature is lowered, and a large amount of energy is required to raise the temperature after repair, so that the economical efficiency is extremely poor. Therefore, without lowering the temperature of the furnace, insert the beam into the opening such as the manhole provided in the upper part of the side wall of the furnace to support the spray nozzle body from the beam, and from the spray nozzle to place the refractory material at the wear point. The method of spraying and hot repair is adopted.

FIG. 7 shows a schematic construction of a refractory spraying device conventionally used for hot repair, where 1 is an industrial furnace,
2 is its inner wall, which is made of refractory material. Reference numeral 3 is a repaired part where the fire wall is worn. Reference numeral 4 denotes a manhole provided on an upper portion of a side wall of the furnace, and a spray nozzle body 7 is supported by a cantilever beam 5 (or a beam spanning manholes on both sides) inserted from the manhole 4 into the furnace by a wire 6 or the like. The material is sent to the spray nozzle body 7 through the hose 8 together with the compressed air, and the material is sprayed from the nozzle 9 and sprayed on the repaired required portion 3. In this case, the nozzle 9 is horizontally swung by using the motor 10, the gears 11 and 12, etc., and the nozzle 9 is sprayed onto a required area of the repaired portion 3.

[0004]

However, since the swing mechanism (or swivel mechanism) having the above-described structure has the rotary joint portion 13 and the bent portion 14 bent at a substantially right angle, the seal of the rotary joint portion 13 is not provided. Insufficient, biting of the granular material into the rotary sliding portion, and the bent portion 14 that bends at a substantially right angle are always worn in the same direction, and if that portion is damaged, the entire bent portion must be replaced.
Further, since liquid is added to the powder or granules before the vent portion in order to enhance the adhesiveness, the material that easily develops viscosity adheres to the same portion for the same reason as described above, and causes clogging. Since the replacement of the device is required by disassembling the device, it has a weak point that the life of the vent portion becomes the life of the device once used.

The present invention has been made in order to solve the problems of the above-mentioned conventional structure, and does not use a rotary joint,
It is another object of the present invention to provide a spray nozzle swirling device and a refractory spraying device using the spray nozzle swiveling device, in which a certain part of the vent portion is not worn or clogged due to adhesion.

[0006]

In order to achieve the above object, a spray nozzle swivel device of the present invention comprises a vertical tube body fixed to a fixed frame and connected to a material supply hose at its upper end, and a vertical tube body of this vertical tube body. A swivel frame having an upper portion rotatably attached to an intermediate portion, and a horizontal tube body rotatably attached to one side surface of the swivel frame in a direction substantially perpendicular to the vertical tube body, and having a spray nozzle connected to a tip end thereof. A fixed bevel gear fixed to a lower end of the vertical pipe located inside the swivel frame, a rotary bevel gear fixed to one end of the horizontal pipe located inside the swivel frame and having the same number of teeth to mesh with the fixed bevel gear, and a fixed frame. It is composed of a swivel driving means provided between the swivel frame and a flexible hose having a substantially elbow shape in which one end is inserted and fixed to the vertical tube and the horizontal tube.

Further, the refractory spraying device of the present invention is mainly composed of the above spray nozzle swiveling device, the flexible hose is made of a wear resistant hose, and is mounted between the material supply hose and the vertical pipe body, The refractory powder and granular material supplied by the material supply hose is provided with an adding device for adding water or a chemical solution necessary for hardening and adhering the refractory material.

[0008]

According to the above construction, in the spray nozzle swivel device, since one substantially elbow-shaped flexible hose is used in place of the conventional rotary joint, biting of the granular material does not occur. Further, when the revolving frame is revolved by the revolving drive means, the rotating bevel gear that meshes with the fixed bevel gear rotates in accordance with the revolving angle to automatically eliminate the occurrence of twisting of the substantially elbow-shaped flexible hose. ,
Therefore, the portion of the vent portion that is subject to wear constantly changes its position, dispersion of wear and prevention of adhesion are performed, and the life of the pipeline is significantly extended.

[0009]

Embodiments will be described in detail below with reference to the drawings. FIG. 1 shows a spray nozzle swirl device 20 in a refractory spray device according to an embodiment of the present invention. The spray nozzle swirl device 20 is, for example, as shown in FIG.
The beam 19 is suspended from the manholes 4 on both sides of the upper part of the rod by a wire 6 to support the beam at a desired position in the furnace. Reference numeral 47 is a flexible pipe in which hoses for feeding materials, compressed air and the like to the spray nozzle swivel device 20 are collectively housed.

In FIG. 1, 21 is a fixed frame supported by the wire 6, 22 is a vertical tube fixed to the fixed frame 21 and a material supply hose 23 is connected to the upper end, and 24 is an intermediate portion of the vertical tube 22. The upper part is a revolving frame which is rotatably attached, and 25 is its thrust bearing. Reference numeral 26 is a horizontal tube body which is attached to one side surface of the revolving frame 24 so as to be rotatable in a direction substantially perpendicular to the vertical tube body 22, and has a tip connected to a spray nozzle 27, and 28 is a bearing. 29 is a vertical tube body 22 and a horizontal tube body 26
It is a flexible hose having a substantially elbow shape in which one end of each is inserted and fixed, and is made of a wear resistant hose. 30
Is a fixed bevel gear fixed to the lower end of the vertical pipe 22 inside the turning frame, 31 is fixed to one end of the horizontal pipe 26 inside the turning frame, and a rotary bevel gear with the same number of teeth meshing with the fixed bevel gear 30. , 32 are air motors with reduction gears fixed to the fixed frame 21 and are rotated by compressed air sent from an air hose 33. This rotation is fixed to the upper surface of the motor gear 34 and the fixed frame 24, and the rotation frame 24 is fixed through the frame gear 35 that meshes with the motor gear 34.
To drive. 36 is a liquid addition device that is mounted between the material supply hose 23 and the vertical tube body 22 and adds water or a chemical solution necessary for hardening and adhesion of the refractory material to the refractory powder particles supplied by the material supply hose. , 37 are spray nozzles of the swivel frame 24
A balance weight provided on the opposite side of 27.

Next, the operation of this embodiment will be described. As shown in FIG. 8, the spray nozzle swivel device 20 is supported by the wire 6 inside the industrial furnace at a position where the tip of the spray nozzle 27 faces the repaired portion. The refractory material is sent together with the compressed air from the material supply hose 23, while the water or the chemical solution necessary for hardening and adhering the refractory material is supplied to the liquid adding device 36, where both are mixed and sprayed from the spray nozzle 27. It is sprayed and sprayed. In this case, the rotation of the air motor 32 causes the spray nozzle 27 to swing or swivel in the horizontal direction together with the swivel frame 24.

When the swivel frame 24 swivels with respect to the fixed vertical tube body 22 as indicated by an arrow A, the rotary bevel gear 31 meshing with the fixed bevel gear 30 fixed to the vertical tube body 22 also moves on the circumference of the fixed bevel gear 30. And revolves around itself. Therefore, the lateral tube body 26 and the spray nozzle 27 also rotate as shown by the arrow B. If the horizontal tube body 26 is fixed to the swivel frame 24, one end of the flexible hose 29 is oriented 180 ° from the left side of the figure to the right side of the figure as shown in FIG. 2 (a). When the point is changed, the p point of the line L that was on the front surface of the hose at the beginning is located on the back surface of the hose when the direction is changed by 180 ° to the right side, and the flexible hose 29 is twisted. Will end up. However, in the present invention, FIG.
As shown in FIG. 4, when one end of the flexible hose 29 is turned 180 ° from the left side of the drawing to the front side to the right side, the one end of the flexible hose 29 is also rotated 180 ° as shown by an arrow C via the rotary bevel gear 31,
The p point of the line L moves to the front surface of the hose, and as a result, the twisting of the flexible hose 29 is automatically eliminated.

As described above, since the substantially elbow type flexible hose can be used in the swiveling portion, it is not necessary to use a rotary joint as in the prior art, and therefore, biting of the granular material does not occur. Absent. Further, the turning causes the wear portion of the vent portion to constantly change its position, and the wear is dispersed, so that the life of the pipeline is significantly extended.

FIG. 3 shows another embodiment of the present invention. When hot spray repair is performed without lowering the temperature of the industrial furnace, a considerable amount of heat is applied to the swivel device, and it is necessary to take measures against it. In this embodiment, first, in order to thermally protect various components such as the liquid addition device 36 attached to the fixed frame 21 and the swivel frame 24, swivel driving means and bearings, a cover 40 made of a heat resistant heat insulating material is provided. ing. Further, when the fixed bevel gear and the rotating bevel gear used in the embodiment of FIG. 1 expand due to high temperature and press each other, and there is a risk of hindering rotation, notches are used instead of the bevel gear and notches or pins are equally spaced on the outer circumference. Using the pair of discs 41, 42 arranged at, the notches or pins are engaged with each other. Further, as shown in FIG. 4, a material supply hose 23, a liquid hose 43 for supplying water or a chemical liquid to the liquid adding device 36, an air hose 33 for supplying compressed air to the air motor 32, and a cooling nozzle swirling device cooling air are supplied. The air hose 45 and the power supply cable 46 for supplying electric power to the illuminator, which will be described later in detail, are collectively introduced into the large-diameter flexible tube 47 and guided to the turning device. This large diameter flexible tube 47 further includes a spacer 48 between each hose and cable.
Through which the cooling air is passed. The air sent from outside the furnace through the air hoses 33, 45, the ventilation holes 49, etc. swirls from the gap between the cover 40 provided on the fixed frame 21 and the swivel frame 24 and the opening of the bearing and other covers. Discharge to the outside of the equipment (inside the furnace).

By adopting such a construction, the swivel device is protected from heat during hot spray repair, and the gears and bearings are protected from dust filled in the furnace to ensure a smooth swirling operation. can do. If heat resistance is not required, a metal cover may be provided to prevent dust and the like from entering.

FIG. 5 shows the horizontal tube 26 of the swing frame 24.
An illuminator 51 for illuminating the part to which the refractory is sprayed is arranged in the vicinity of. To connect the power supply to this illuminator 51,
Power line extending from the power cable 46 on the fixed frame 21 side
A conductive member 53 to which 52 is connected is provided, and an annular conductive overhead wire 54 on which the conductive member 53 slides is provided on the revolving frame 24 side as shown in FIG. The line 55 is connected to the container 51.

The annular conductive overhead wire 54 may be provided on the fixed frame 21 side, and the conductive member 53 that slides on the fixed frame 21 side may be provided on the swivel frame 24 side. Moreover, it goes without saying that the conductive member 53 may be of a system in which it rolls on the annular conductive overhead wire 54.
Further, the spray nozzle swivel device of the present invention is not limited to use in a refractory spray device, but may be applied to various fields such as the spray coating field.

[0018]

As described above, according to the present invention, (1) a substantially elbow type flexible hose is used for a material conduit of a swivel device without using a rotary joint, and one end of the hose is When fixed and rotated at the other end, it is usually twisted, but in the present invention, the other end of the hose is rotated at an angle according to the rotation angle using a pair of bevel gears or a disk in which pins are arranged at equal intervals. Therefore, the hose is not twisted, and therefore, the biting of the granular material does not occur unlike the conventional case.

(2) When powder particles are flown through a curved pipe at high speed, the inner wall on the outside of the curve of the pipe is intensively worn, but the flexible hose is swung without twisting and is worn. Since the parts are constantly repositioned and the wear is distributed, the life of the pipeline is greatly extended.

(3) The powdery or granular material to which water or a chemical solution has been added by the liquid adding device becomes sticky and easily adheres to the wall surface of the pipe line, particularly adheres to the outer wall surface of the curve. When the flexible hose turns without twisting, the outside and inside of the curved part of the pipeline are constantly alternated, and the wall surface expands and contracts, so that the deposits are naturally peeled off and a so-called self-cleaning effect is produced, Blockage is prevented.

(4) By providing a heat-resistant heat-insulating material cover or providing means such as air cooling, various parts of the swivel device can be protected from heat and a reliable and smooth swiveling operation can be guaranteed.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a spray nozzle swivel device in a refractory spray device according to an embodiment of the present invention.

FIG. 2 is an operation explanatory diagram of the embodiment.

FIG. 3 is a cross-sectional view of a spray nozzle swivel device in a refractory spray device according to another embodiment of the present invention.

FIG. 4 is a diagram showing an internal configuration of a large-diameter flexible pipe that supplies materials and the like from the outside to a spray nozzle swirling device.

FIG. 5 is a diagram showing an illuminator provided in a spray nozzle swivel device and a power supply connection mechanism thereof.

FIG. 6 is an enlarged view of a main part of the power supply connection mechanism.

FIG. 7 is a schematic configuration diagram of a conventional refractory spraying device used for hot spray repair in an industrial furnace.

FIG. 8 is a schematic configuration diagram of a refractory spraying device used for hot spray repair according to the present invention.

[Explanation of symbols]

21… Fixed frame, 22… Vertical tube, 23… Material supply hose, 24… Swivel frame, 26… Horizontal tube, 27…
Spray nozzle, 29… Flexible hose, 30… Fixed bevel gear, 31… Rotary bevel gear, 32… Air motor,
33,45… Air hose, 36… Liquid addition device, 40… Insulation cover, 41… Fixed disk, 42… Rotary disk, 46…
Power cable, 47… Large diameter flexible tube, 51… Illuminator,
53 ... Conductive member, 54 ... Ring conductive overhead wire.

Claims (7)

[Claims] 1. A vertical pipe body (22) fixed to a fixed frame (21) and having a material supply hose (23) connected to the upper end thereof, and an upper part rotatably attached to an intermediate portion of the vertical pipe body. Swivel frame
(24) and a spray nozzle (27) attached to one side surface of the revolving frame so as to be rotatable in a direction substantially perpendicular to the vertical tubular body,
And a fixed bevel gear (30) fixed to the lower end of the vertical tube located inside the revolving frame of the vertical tube.
A rotary bevel gear (31) fixed to one end of the lateral tube located inside the swivel frame and having the same number of teeth that meshes with the fixed bevel gear, and swivel driving means provided between the fixed frame and the swivel frame. (32, 34, 35) and a flexible hose (29) having a substantially elbow shape, one end of which is inserted and fixed to the vertical pipe and the horizontal pipe, respectively, and the turning frame is driven by the turning drive means. When the swivel nozzle swivels, the rotating bevel gear that meshes with the fixed bevel gear rotates according to the swivel angle, and the twisting of the substantially elbow-shaped flexible hose is automatically canceled. apparatus. 2. A pair of disks in which notches or pins are arranged at equal intervals on the outer circumference instead of the fixed bevel gear and the rotating bevel gear.
The spray nozzle swivel device according to claim 1, wherein the notches or pins are engaged with each other by using (41, 42). 3. The blowing nozzle swivel device according to claim 1, wherein the flexible hose (29) is a wear resistant hose, and between the material supply hose (23) and the vertical pipe body (22). It is characterized in that the refractory powder granules attached to the material supply hose is provided with a liquid addition device (36) for adding water or a chemical liquid necessary for hardening and adhesion of the refractory substance. Refractory spraying device. 4. The swing drive means is fixed to the upper surface of the air motor (32) installed on the fixed frame (21) and the swing frame (24), and a frame gear (which meshes with the motor gear (34) of the air motor (34). 35) and 3).
The refractory spraying device described. 5. An illuminator (51) which is arranged in the vicinity of the lateral tube body (26) of the swivel frame (24) and illuminates a portion to which the refractory is sprayed.
And a fixed frame (21) to connect the power supply to the illuminator
Or a revolving frame (24) provided with an annular conductive overhead wire (54) provided on one side, and a conductive member (53) provided on the other side and sliding or rolling with respect to the annular conductive overhead wire The refractory spraying device according to claim 3 or 4. 6. Fixed frame (21) and swivel frame (24)
Each of them is provided with a metal cover or a cover (40) made of a heat-resistant heat insulating material to protect various parts mounted on each frame from surrounding dust and the like, and a means for introducing cooling air into the heat insulating material cover. The refractory spraying device according to any one of claims 3 to 5, further comprising (45, 49). 7. A material supply hose (23), a liquid hose (43) for supplying water or a chemical liquid to the liquid addition device (36), an air hose (33) for supplying compressed air to an air motor (32), and a spray nozzle swivel device. Air hose (45) for supplying cooling air and illuminator (51)
The power cable (46) for supplying power to the large diameter flexible tube (47)
7. A ventilation gap (49) for collecting cooling air is provided between each of the hoses and the cables, and the ventilation gaps (49) are gathered inside and guided to a swivel device. Refractory spraying device.