KR100460741B1 - Spray apparatus for repairing the wall of the furnace - Google Patents

Abstract

The present invention relates to a spray device that is detachably mounted to the lower portion of the rotation to spray the refractory to the furnace wall, spraying for repairing the furnace wall detachably mounted to the lower portion of the rotation so that the refractory conveyed through the hose to the furnace wall can be sprayed In the apparatus, the spray is made to refractory is injected through a nozzle mounted to the tip of the flexible hose in communication with the transfer hose, the bearing is mounted on both open ends of the control pipe to which the spray is fixed, A control unit and an induction pipe unit arranged to be movable, a rotary gear engaged with the horizontal gear and the control tube unit of the induction pipe unit are driven by a motor, and the motor and the rotation gear are sealed to provide an air purge hole, and the rotation unit Tip of flexible hose with fixed distance measuring sensor rotating to furnace wall It is characterized by consisting of the sensor unit to cross-measure the mounted measuring plate, to maintain and maintain a constant distance between the furnace wall and the injection nozzle at all times to minimize the amount of rebound loss, freely and easily adjust the length of the spray nozzle, no need for nozzle replacement Therefore, maintenance time can be saved.

Description

Spray apparatus for repairing the wall of the furnace}

The present invention relates to a spray device for furnace wall repair for minimizing rebound loss and shortening the work process during furnace spray repair, and more particularly, to maintain a furnace wall while maintaining a proper distance between the spray nozzle and the furnace wall during refractory spraying. The present invention relates to a spray device for furnace wall repair that minimizes the amount of rebound loss and does not require spray nozzle replacement.

Furnace is the main equipment of steel making facilities to reduce iron ore to produce iron, and to charge the iron ore raw material and coke fuel alternately, and to blow the preheated air through the blower in the lower part to burn iron ore raw material and coke fuel to coke The high temperature CO gas generated by the combustion of the iron is increased while reducing reaction with iron ore.

The process described above occurs continuously, and the iron ore, which is a raw material for producing iron, and the coke used as fuel are reduced and melted at the bottom of the furnace, and the iron ore and the coke, which are charged, are continuously lowered while rubbing with the furnace wall.

The continuous friction with this load of the furnace wall 8 damages the refractory at the furnace wall area, making the thickness of the furnace wall thin.

As a result, the cooling plate inserted in the furnace wall portion for the purpose of controlling the temperature rise in the furnace wall portion protrudes into the furnace, and the thinned furnace wall is surrounded by the steel shell surrounding the furnace (7). Raising the temperature of) will cause cracking of the steel bar.

In addition, when the cooling panel protruding from the thinned furnace wall is damaged by the high temperature reducing gas rising from the lower part of the furnace wall by friction with the charged material, a large amount of cooling water flows into the furnace and due to heat shortage in the furnace. The problem is that molten iron and slag have not been discharged.

In order to prevent such a problem, as shown in FIG. 1, the refractory stored in the hopper 3 is conveyed to the feed hose 1a by the feed gun 2 at 10 kg / cm 2, as shown in FIG. 1. Thereafter, the spray pipe 18 and the device are rotated periodically by the rotation 10 to spray and attach the refractory to which the moisture is added to the furnace wall at a predetermined distance.

In order to perform this operation, the level of the furnace charge (9) should be lowered by about 18M. In this state, the taper-shaped shaft is rotated by the rotation 10 from the bottom of the shaft to the upper side and repaired. You will be working.

At this time, the spray pipe 18 having a different length from each other up to the upper side is replaced 3 to 4 times to maintain a proper distance with the furnace wall (8).

This pipe change operation is performed by removing the spray pipe 18 from the insertion hole 17 by hand, as shown in FIG. 18) by inserting into the insertion port 17.

On the other hand, the wire rope 6 is connected to the three rollers 11 attached to the rotation 10 in a certain direction to support the spray device, while adjusting the length of each length for horizontal maintenance of the spray pipe 18 during the furnace wall repair work. Make this possible.

However, in the conventional furnace wall repair operation, it is impossible to maintain the proper distance and length of the furnace wall 8 and the injection nozzle, so that the movement trajectory 110 of the specific area and the spray pipe 18 is inevitably maintained at right angles, so that the spray refractory material is sprayed. As the amount of rebound loss does not adhere to this furnace wall 8, the amount of refractories required for the furnace wall repair work is consumed, resulting in an increase in repair cost.

On the other hand, it takes about 40 minutes to replace the spray pipe once, so the problem of delaying the entire repair process and the reflowing refractory when injecting air to reduce the iron ore through the air vent in the lower part of the furnace wall after the maintenance work is completed. This results in coating the surface of the charge 9, which causes problems in supplying large amounts of preheated air.

The present invention has been made in view of the above problems, the distance between the spray nozzle and the furnace wall mounted on the end of the flexible hose to which the refractory is transported is always kept constant, the amount of rebound loss is significantly reduced during spray maintenance work It is possible to provide a spraying device for repairing a furnace wall, in which a maintenance time can be saved because replacement of a nozzle according to a lifting position of the nozzle is unnecessary.

1 is a configuration diagram showing a conventional furnace wall spray repair work

Figure 2 is a detail view "A" part of a conventionally used spray apparatus

3 is a perspective view of a spray device of the present invention

Figure 4 is a perspective view showing the "B" portion coupling relationship

<Description of Symbols for Major Parts of Drawings>

6: wire rope

10: rotation

31: spray nozzle

33: Tee Fitting

50: control tube

73: reverse circuit motor

80: distance measuring sensor

81: measuring plate

90 length induction pipe

91: Upper guide

95: streetkeeper

100: induction pipe

In order to achieve the above object, according to the present invention, the spray device detachably mounted to the lower portion of the rotation to inject the refractory to the furnace wall is spray unit for spraying the refractory material conveyed through the flexible hose and the spray nozzle, Ball bearings and guide bearings are attached to both ends of the main body formed with a through hole of a predetermined size, and a groove is formed in the middle lower side of the main body, and an upper portion of the control tube provided with ribs, connecting rods and threads, and a guide is attached to the upper part. A horizontal gear is attached to the lower part, and the length guide pipe portion is provided with a weight at the rear end, which is reciprocated through the through hole of the control tube portion, and meshes with the horizontal gear of the length guide tube portion through the groove of the lower portion of the control tube portion. A driving unit having a rotating gear and a driving motor for rotating the rotating gear, and the lower end of the rotation Distance measuring sensor provided in the sensor and is characterized in that-part consisting of a predetermined size provided in the upper end of the measuring plate of the spray nozzle.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention.

According to the present invention, the spray device for repairing the furnace wall is composed of a lower tee fitting 33 and an electric wire insertion hole 34 of the rotation 10, and the flexible hose 30 and the spray nozzle 31 spray the sprayed refractory material. In the left and right sides, the ball bearing 52a and the guide bearings 51 and 52 with the upper and lower guide grooves 53 and 54 are attached to each other to form a through hole 50a of a predetermined size. Groove 55 is the upper portion of the control tube 50 consisting of a rib 38, the connecting rod 36, the threaded portion 35: the upper guide 91 and the horizontal gear in the lower portion of the length guide tube 90 ( 92 is attached and reciprocated while sliding freely through the through hole (50a) of the control tube 50, the rear end side of the length guide tube portion consisting of the weight 94 and the distance retainer 95: a gear that rotates in engagement with the horizontal gear 92 70 is driven by the help of the motor 73, the coupling 72, and the reducer 71, which are configured as a reverse circuit, Drive unit consisting of the upper plate 74, the air purge 101 and the power cable 103 surrounding the device to block and increase the cooling efficiency: the distance measuring sensor 80 and the spray nozzle (one side of the rotation 10) 31) The measuring plate 81 of a predetermined size is installed on the top and consists of a sensor unit for automatically measuring the distance at each rotation of the spray device.

First, the spray unit extends the existing feed hole to add the wire insertion hole 34 in the tee fitting 33, and then inserts the induction pipe 100 by drilling the hole 1b in the transfer hose 1a, and then the tee fitting. (33) The induction pipe 100 is led to the spray apparatus through the lower end hole 33a.

In addition, the flange 32 is attached to a hole formed through one side of the tee fitting 33 and screwed with the flexible hose 30, and the spray nozzle 31 is screwed with the flexible hose 30. 31a).

On the other hand, the guide bearings (51, 52) on both sides of the adjustment pipe portion has a structure that does not have an inner ring in the general ball bearing is composed of only the outer ring and the retainer to enable the linear movement of the length guide pipe (90) and the guide grooves (53, 54) ) And the control pipe 50 and both side guide bearings (51, 52) are welded to match the guide groove.

In addition, the lower middle of the control tube 50 is formed with a groove 55 having a size into which the gear 70 enters, and a through hole 50a having a size capable of freely moving the length guide tube 90 is formed. Rib 38 is attached to the top of the control tube 50, the connecting rod 36 consisting of screws 35 at the upper and lower ends are fastened and separated from each other by a hole and fixing rod 37 penetrated to both sides, the connecting rod 36 ) Is coupled to the lower end of the tee fitting 33 and the screw 35 has a structure in which the spray unit and the adjusting tube unit are integrated.

On the other hand, the length guide pipe portion of the size that can be inserted into the lower guide groove 54 is located in the upper guide 91 of the size that can be inserted into the upper guide groove 53 in the upper portion of the length guide pipe (90). A horizontal gear 92 is configured and a connection 93 is provided at the tip of the length guide tube 90 to fix the spray nozzle 31.

In order to level the spray device during the spraying operation on the rear end side, the distance holder 95 and the weight 94 are moved along the weight guide 94a, and the double pipe structure of the inner flange 96 and the outer flange 76 is combined. It can be fastened and disassembled by the fixing pin 99 and the weight guide 94a is welded with the length guide tube 90 aft to form a length guide tube portion.

In addition, the driving unit is driven by the help of the motor 73, the coupling 72, and the speed reducer 71, which are rotated in engagement with the horizontal gear 92. The reducer 71 is fixed to the upper plate 74 by brackets 71a and bolts 71b on the outside, and the upper plate surrounding the apparatus to block the hot heat inside the blast furnace emitted during maintenance work and to increase the cooling efficiency. The cover 74a has a cover 74a so that the driving part is sealed, and an air purge hole 101 is disposed at one side of the cover 74a, and a motor power cable 103 is installed inside.

Further, an air drain hole 102 is drilled on the side opposite to the air purge hole 101, and the driving part is welded to the adjusting pipe 50 by a support on which the upper plate 74, the beam 75, and the fixing pipe 76 are integrated. ) To completely block the movement of the drive.

The sensor unit is provided with a measuring plate 81 having a size of 1000 mm × 400 mm at a lower end of the rotation 10 by the support 82 on the distance measuring sensor 80 and the spray nozzle 31, and the distance of each rotation of the spray device once. Is automatically measured.

That is, since the rotation 10 with the length measuring sensor 80 capable of measuring more than 10M rotates only the lower spray device without rotating, the sensor always measures the furnace wall 8 distance and the spray nozzle 31 rotates once. Since it comes into contact with the measuring plate 81 at the point of arrival to the origin again, it is possible to know what is the distance between the furnace wall 8 and the spray nozzle 31.

According to the test result, the proper distance between the furnace wall 8 and the spray nozzle 31 which show the least amount of rebound loss at the time of refractory injection is about 2M.

Referring to the operation of the spray device according to the invention configured as described above are as follows.

In order to enter the spray device and rotation 10, which are integrally configured to perform the repair of the furnace wall spray, the various devices are inspected, and then the measuring plate 81 and the distance measuring sensor 80 are put in place. The circuit motor 73 is operated to operate a predetermined distance, for example, a value of 5.4 M, on the distance indicator of the operating table.

Then, using the three wire ropes 6 to descend to a predetermined position in the furnace, each of the wire ropes (6) to adjust the level, then rotate the rotation 10 slightly by the distance measuring sensor 80 the furnace wall distance By measuring the value displayed on the distance indicator of the operating table, the operation between the spray nozzle 31 and the furnace wall 8 can be maintained at a distance of 2M.

The air purge on switch of the operating unit is operated to cool the driving unit through the air purge hole 101.

Spray spray from the bottom to the top while operating the motor-drive switch while referring to the values shown on the trajectory 120 and the distance indicator 130a of the spray nozzle 31 while spraying the refractory to which moisture is added. Do the work.

According to the present invention configured as described above, the furnace wall and the spray nozzle can always maintain a constant distance, by refractory is uniformly sprayed on the furnace wall, precise construction can be made, the amount of rebound loss generated in the exchange area of the nozzle is minimized And, the time required for the replacement operation of the nozzle is removed, thereby reducing the work time.

The foregoing is merely illustrative of the preferred embodiments of the present invention and those skilled in the art to which the present invention pertains may make modifications and changes to the present invention without departing from the spirit and gist of the invention as set forth in the appended claims. It should be recognized.

Claims (2)

In the furnace wall repair spray apparatus detachably mounted to the lower portion of the rotation so that the refractory material transferred through the hose to the furnace wall, A spray unit configured to spray the refractory material through a nozzle mounted to the front end of the flexible hose communicating with the transfer hose; Bearings are mounted at both ends of the opening of the control tube to which the spray unit is fixed, and the control tube and the guide tube arranged to be movable through the bearing, A driving gear having a rotary gear meshing with the horizontal gear of the induction pipe portion, a motor for driving the rotary gear, a casing for sealing the rotary gear and the motor, and an air purge hole formed in the casing. , A sensor unit configured to cross measure a measurement plate mounted at the front end of the flexible hose to which the distance measuring sensor fixed to the rotation is rotated; Furnace wall repair spraying device comprising a. delete