KR20000013476U - Foreign material removal device in annealing furnace - Google Patents

Abstract

The present invention relates to the provision of an apparatus for removing foreign substances in an annealing furnace configured to safely clean and remove foreign substances in an oxidizing annealing furnace in an annealing furnace of an annealing stainless steel cold rolling mill without stopping the operation of the facility.

The invention devises a plurality of air heads 17 having air injection nozzles 18 at the bottom bottom through which the strip S of the annealing furnace 22 passes through the solenoid valves 21-1 to 21-n. It is installed at regular intervals so that the supply is controlled, and the blocking plates 33 which are rotated by the cylinder 27 are installed above the air heads 17, and the bottom of the furnace is installed by the air heads 17. The foreign material in the annealing furnace is characterized in that the inlet (3) and the discharge pipe (11), the exhaust hood (6) and the fan 10 for discharging the foreign matter to the outside of the furnace is installed on the side to remove the foreign matter. Provide the device.

Description

Foreign material removal device in annealing furnace

The present invention is designed to easily clean and remove foreign substances in the annealing furnace that causes defects in the white spots occurring on the upper and lower strips during annealing of the cold rolled material coil in the oxidizing annealing furnace of the stainless annealing line of annealing stainless steel. The present invention relates to an apparatus for removing foreign matter in an annealing furnace.

Figure 1 shows a conventional annealing furnace internal apparatus related to the present invention, when foreign matter or naturally occurring foreign substances dropped from the heat insulating material 23 remaining in the furnace strip (S) progress and heat in the annealing furnace (about 1000 ℃ or more) Due to air vortex generation, foreign matters in the furnace are attached to the upper and lower strips S passing through the annealing furnace, causing defects of white spots (surface defects in the form of white spots). After the line stop, the internal temperature of the annealing furnace 22 is lowered, and when the internal temperature of the furnace is lowered to 100 ° C. or lower, the binding bolt of the annealing furnace side cover 24 is dismantled. The inside of the furnace was entered to clean and remove foreign substances from the bottom of the furnace.

In the conventional method of removing foreign matters in the furnace, since the worker enters the annealing furnace and cleans it in a state where the temperature in the annealing furnace is lowered after the line stop, the productivity is reduced due to the interruption of production for a long time, and also in the hot furnace. There was a problem that a worker may be injured by a burn or a safety accident.

The present invention is to solve the conventional problems as described above, and to clean the inside of the annealing furnace by remote control in the annealing furnace sealed state without lowering the temperature in the annealing furnace or dismantling the annealing furnace side cover. The object is to provide a device that can be automatically implemented.

1 is a perspective view of a conventional device,

2 is an overall perspective view of the present invention,

FIG. 3 is a detail view of a part of FIG. 2;

4 is a detail view of the "B" portion of FIG.

FIG. 5 is a detail view of the portion "multi" in FIG.

Explanation of symbols on the main parts of the drawings

1: inclined plate 3: inlet

4: connector 6: exhaust hood

7: bearing block 8: motor

9: base 10: fan

11: outlet line 17: airhead

18: nozzle 19: timer

20: control panel 21-1 to 21-n: solenoid valve

22: annealing furnace 23: insulation

24: Annealing furnace side cover 26: Air supply piping

27: cylinder 28: horizontal bar

29: circular arc rail 30: axis

31: Link 32: Block plate axis

33: blocking plate 34: low pressure adjustment cover

35: bearing block 36: low pressure exhaust

37: handle 38: adjustment weight

39: cover shaft 40: upper jaw

41: lower jaw 43: detection sensor

44: detection bar

Hereinafter, with reference to the accompanying drawings the technical contents of the present invention for achieving the above object will be described in detail.

As shown in FIG. 2, a plurality of air heads 17 having a plurality of nozzles 18 are installed at a predetermined interval on the bottom of the lower part through which the strip S inside the annealing furnace 22 passes. Solenoid valves 21-1, 21-2 ... 21-n are attached to the front end of each air head 17, and the air supply pipe 26 is connected to the rear end of the solenoid valve. When is opened, air is released from each nozzle 18 to cause the bottom of the annealing furnace to be cleaned. In the air cleaning operation, the shut-off device is installed to operate. Referring to FIG. 4, which is a partial detail view of FIG. 2, the rod end of the cylinder 27 installed outside the furnace is provided on the horizontal moving bar 28. FIG. The connection plate is installed in the furnace so that the blocking plate 33 is rotated about the shaft 32, and the link 31 is welded and fixed to the end of the shaft 32, and the end of the link 31 is horizontally moved. Bind to the bar 28 and the shaft 30, the shaft 30 is installed to be movable along the arcuate rail (29). When the horizontal movement bar 28 is moved to the right side by the expansion operation of the cylinder 27, the link 31 connected to the shaft 30 rotates in a semicircle along the arcuate rail 29 to rotate the shaft 32. Accordingly, the blocking plate 33 welded to the shaft 32 is placed in a vertical direction in the drawing. In addition, during the reduction operation of the cylinder 27, the link 31 is rotated to the left side as shown in the figure so that the blocking plate 33 is placed horizontally and overlaps the adjacent blocking plates before and after the inside of the annealing furnace. The blocking plate 33 is separated up and down with respect to the blocking plate 33, and the detecting sensor 43 for detecting such a blocking state detects the detecting bar 44 installed under the cylinder rod binding unit. It is designed to recognize the blocking state by.

The in-furnace impurities and foreign matter moved by the air spray through the air head 17 are set out to the outside of the furnace, the configuration of which will be described with reference to FIG. When air is discharged through the air nozzle 18 due to the opening of the air solenoid valve 21-n, foreign matter in the furnace is installed to move into the inlet 3 of the lower part of the inclined plate 1 by the air. In order to remove, the motor 8 is installed in the base 9 outside the furnace, and the foreign matter discharge pipe 11 is provided at the suction side of the fan 10 which is rotated by the motor 8, and the exhaust hood 6 is discharged at the discharge side. ) Are respectively installed and connected to the inlet (3) through the connecting pipe (4) to the discharge pipe (11).

After operating the blocking plate 33 in a blocked state, in order to prevent the low pressure rise that occurs when the air is discharged through the air nozzle 18, the low pressure exhaust mechanism 36 is installed at one side of the annealing furnace. The low pressure adjusting cover 34 was installed to adjust the low pressure, and the cover shaft 39 was supported by the bearing block 35 at a point approximately distant from the center of the low pressure adjusting cover 34. The handle 37 provided with the adjustment weight 38 on one side of the cover shaft 39 is welded and fixed so that the cover 34 is horizontal so that the upper jaw 40 and the lower jaw 41 of the low pressure exhaust mechanism 36 are normally. The adjustment weight 38 is adjusted to be in close contact with the cover. When the lower pressure is raised, the cover is opened upward by the lower pressure to adjust the lower pressure.

In operation, by pressing the foreign substance removal operation switch of the control panel 20 to remove the foreign substance in the furnace floor dropped into the air vortex while passing through the strip (S) in the annealing furnace 22, the cylinder 27 is reduced As the blocking plate 32 is operated to the blocking position, the motor 8 is driven. When the reduction of the cylinder 27 is performed, the blocking plate 33, which is standing as shown in FIG. 2, is rotated horizontally as shown in FIG. The principle of blocking the part and the upper furnace is that the link 31 connected to the shaft 30 is moved along the arcuate rail 29 as the horizontal bar 28 moves to the left in the drawing during the reduction operation of the cylinder 27. It is moved to the left side, the blocking plate 33 is rotated horizontally by the rotation of the blocking plate shaft 32 by the rotation of the link 31, the adjacent blocking plate 33 overlaps each other to block the lower and lower parts Let's go. At this time, when the detection sensor 43 detects the detection bar 44 moved by the reduction operation of the cylinder 27 and transmits a signal to the timer 19, the solenoid valve 21-7 from the air solenoid valve 21-1. The valve opening / closing is repeated several times in sequence several times until), and the air injection through the air head 17 is performed, and the dust and foreign substances at the bottom of the furnace are sent to the inlet 3 by the air injection. At the same time, as the fan 10 is rotated by the driving of the motor 8, foreign substances moved to the suction port 3 are taken out of the furnace through the discharge pipe 11 and the exhaust hood 6. In addition, when the pressure rises due to the air spray as described above, the low pressure acts on the low pressure adjusting cover 36 provided above the low pressure exhaust mechanism 36 through the low pressure exhaust mechanism 36, and the low pressure is adjusted while the cover 34 is opened.

After a predetermined time set in the timer 19 after the operation as described above, the operation of the motor 8 is stopped and the cylinder 27 is extended and the blocking plates 33 are opened, and each air solenoid 21-1 is opened. (21-7) is closed again, and the removal of foreign matter in the annealing furnace is completed.

As described above, the device of the present invention can quickly and safely remove foreign substances in the furnace generated in the annealing furnace of the stainless annealing line in an annealing plant of stainless annealing plant to bring about safety, productivity and quality improvement of the facility. To provide that effect.

Claims (2)

The air supply is controlled by the solenoid valves 21-1 through 21-n, respectively, of the plurality of air heads 17 having the air injection nozzles 18 at the lower bottom side through which the strip S of the annealing furnace 22 passes. It is installed at a predetermined interval so as to install the blocking plate 33 that is rotated by the cylinder 27 in the upper air head 17 is installed in this way, foreign matters in the bottom of the furnace by the air head 17 The foreign material removal device in the annealing furnace characterized in that the installation side is provided with a suction inlet (3) and the discharge pipe 11, the exhaust hood (6) and the fan 10 for discharging the foreign matter to the outside of the furnace. The annealing furnace according to claim 1, wherein the annealing furnace (22) is provided at one side of the annealing furnace (22) to adjust a low pressure rise when the foreign matter in the furnace is removed through the air spraying through the air heads (17). My debris removal device.