KR101063467B1 - Annealing Furnace Inlet Seal Box Opening Device - Google Patents

Abstract

An object of the present invention is to omit the atmosphere gas exchange work inside the muffle when the strip break occurs in the bright annealing furnace, so that the break recovery work can be immediately performed to shorten the maintenance time required for the repair work, the productivity according to the line down time An annealing furnace inlet seal box opening device is provided to minimize degradation.

Accordingly, the present invention is a plurality of blocking plates which are installed in turn at a predetermined interval on the upper inlet seal box of the bright annealing furnace and the strip proceeds through the center slit, and located on both sides of the strip at the lower of the upper blocking plate of the blocking plate Failed close contact with both sides of the top blocking plate and the strip, a drive cylinder inclined toward the slit of the top blocking plate inside the seal box and connected to the bottom of the failing block, the bottom of each blocking plate located below the top blocking plate An annealing furnace comprising: a seal roll positioned in contact with both sides of the shielding plate and the strip, a driving means for selectively contacting the seal roll with the strip, and a removal means installed close to the seal roll to wipe the surface of the seal roll to increase adhesion Provides inlet seal box opening.

Barrier plate, failed, seal roll, rack bar, pad, pressing member

Description

An apparatus opening and closing an exhaust port of inlet-seal-box in an annealing furnace}

1 is a perspective view showing a bright annealing furnace to which the present invention is applied;

Figure 2 is a partial cross-sectional perspective view showing the annealing furnace inlet seal box is installed opening device according to the present invention,

3 is a perspective view of a part of the inlet seal box opening device according to the present invention;

4 is an exploded perspective view of FIG. 3 according to the present invention;

Figure 5 is a schematic side cross-sectional view showing an operating state of the inlet seal box opening device according to the present invention.

* Description of the symbols for the main parts of the drawings *

10: top blocker 11: middle blocker

12: lower block 20: failed

21: driving cylinder 30: seal roll

31: Bracket 32: Operation cylinder

33: rack bar 34: rack

35: pinion gear 36: pressure member

37: operating rod 39: elastic spring                 

40: pad 41: supply hose

42: valve

The present invention relates to a bright annealing furnace for bright annealing a stainless cold rolled coil, and more particularly, annealing so that the replacement of the atmosphere gas can be omitted when attempting to open the inlet seal box for cleaning a dance roll or the like. The inlet seal box opening device.

In general, bright annealing is cold rolled strip, which is an annealing in a stream of reducing or non-oxidizing gas so as to prevent the decarburization of the steel surface and not lose metallic luster. The gloss is not lost and the original state is maintained.

The bright annealing uses hydrogen as an atmospheric gas to prevent oxidation and glossiness during heat treatment. The bright annealing furnace is a vacuum in which the inlet and outlet sides of the strip are sealed to prevent the outflow of the hydrogen gas. Forming a furnace.

The annealing furnace in which the bright annealing is performed includes a heating furnace 100, a cooling stand 110, and a return duct 120 that are vertically erected as shown in FIG. 1, and a strip introduced into the lower part of the main body is installed at the upper part of the main body. The cooling duct 110 passes through the inside of the return duct 120 installed vertically.                         

In addition, the entrance seal box 130 and the exit seal box are respectively installed at the strip entrance side and the return duct 120 at the lower portion of the furnace 100 to maintain the airtight inside the furnace.

Inside the inlet seal box is installed a dance roll that operates in accordance with the tension of the strip. The dance roll is connected to a sensing bar via a link and is configured to interact with the sensing sensor. One side of the sensing bar is supported by a cylinder. One side of the inlet seal box is provided with a cover.

In the bright annealing furnace provided with the inlet seal box of the above structure, when the strip is broken, one end of the broken strip falls on the upper part of the inlet seal box at the upper part of the vertical path, making it difficult to recover the break of the strip. In addition, foreign matters accumulate inside the inlet seal box due to the drop impact of the strip.

Therefore, in the case of removing foreign matters accumulated in the inlet seal box and cleaning the rolls, the furnace is first extinguished and then shut off the hydrogen gas filled in the muffle and purged the inside of the furnace with nitrogen gas to lower the furnace temperature. After that, the recovery work is performed. That is, the hydrogen gas has a risk of explosion fire when mixed with air, so the inside of the furnace should be completely purged with nitrogen gas, and the cover should be disassembled.

However, the conventional structure has a problem that the maintenance time is too long, resulting in a decrease in productivity due to the occurrence of line down time.

Therefore, the present invention was devised to solve the above problems, and when strip break occurs in the bright annealing furnace, it is possible to skip the atmosphere gas exchange work inside the muffle and immediately perform the break recovery work. An object of the present invention is to provide an annealing inlet seal box opening device which shortens the maintenance time and minimizes the decrease in productivity due to line down time.

In order to achieve the object as described above, the present invention, the inlet seal box of the bright annealing furnace in order to be installed at a predetermined interval in order and the strip proceeds through the center slit and the blocking plate and each of the blocking plate and both sides of the strip And a sealing means for adhering the seal roll, the driving means for selectively adhering the seal roll to the strip, and a removal means for increasing the adhesion by removing foreign matter on the surface of the seal roll.

Here, the present invention may further include a nitrogen gas input unit for injecting the nitrogen gas for hermetic maintenance into the inner space provided by the silol and the blocking plate.

In addition, the present invention has a structure in which the silol closely contacted between the blocking plate and the strip is a rectangular cross-sectional failing in addition to the roll shape, or the silol and the failed are mixed.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing a bright annealing furnace to which the present invention is applied. According to the drawing, the bright annealing furnace includes a heating furnace 100, a cooling stand 110, and a return duct 120 that are vertically erected. The strip introduced into the lower portion of the strip passes through the inside of the return duct 120 installed vertically through the cooling table 110 installed at the upper portion of the main body. In addition, the entrance seal box 130 and the exit seal box are respectively installed at the entrance side of the strip and the return duct 120 at the bottom of the furnace 100 to maintain airtightness inside the furnace.

In addition, Figure 2 is a partial cross-sectional perspective view showing an annealing furnace inlet seal box is installed an opening device according to the invention, Figure 3 is a perspective view of a part of the configuration of the inlet seal box opening device according to the invention, Figure 4 3 is an exploded perspective view of FIG.

According to the above drawings, the three-stage blocking plate (10, 11, 12) is installed in sequence at a predetermined interval on top of the inlet seal box 130 of the bright annealing furnace and the strip 150 proceeds through the center slit, Located on both sides of the strip 150 at the bottom of the upper blocking plate 10, the failed ledge 20 which is in close contact with both surfaces of the uppermost blocking plate 10 and the strip 150, for selectively moving the failed 20 Drive means, a seal roll 30 which is located on both sides of the strip 150 in the lower portion of the middle, the lower blocking plate 12 to be in close contact with each of the blocking plate and the strip 150, the seal roll (30) optionally the strip ( Driving means for close contact with 150, installed on the seal roll 30, and removing means for cleaning the surface of the seal roll 30 to increase adhesion, and provided by the seal roll 30 and the blocking plates 10, 11, and 12. Nitrogen gas input means for injecting the nitrogen gas for confidentiality in the space.

Here, the number of cutouts and the number and location of the failing 20 or silol 30 may be variously changed according to the embodiment, and all these modifications may also belong to the true spirit of the present invention. In the following description, the blocking plate is made of three stages, and the failed stage 20 is installed at the top thereof, and the rest is described based on the structure in which the silol 30 is installed.

First, referring to the inlet seal box 130, the inlet seal box 130 introduces the strip 150 into the heating table and forms a sealing structure that forms an atmosphere gas by hydrogen gas. The heating table is provided above the inlet seal box 130 to form a hydrogen gas atmosphere.

The inlet seal box 130 of the annealing furnace is provided with an inlet seal roll 30 provided on the inlet side of the strip 150 and a dance roll 50 that operates in accordance with the tension of the strip 150. One side of the seal box 130 is provided with a cover 51 for cleaning the inside of the inlet seal box 130.

Here, the failing 20 is a strip 150 to open and close between the upper blocking plate 10 of the inlet seal box 130 and the strip 150 passing through the center slit of the upper blocking plate 10. It is composed and installed in a pair of opposite postures on both sides of the, consisting of a rectangular cross-section top is in close contact with the bottom of the top blocking plate 10 and the inner surface is in close contact with the strip 150.

In addition, the driving means for moving the failed 20 is inclined toward the slit of the upper blocking plate 10 on one side of the seal box 130 and the driving cylinder connected to the bottom of the failed 20 ( 21).

The seal roll 30 is positioned at the bottom of the intermediate block 11 and the lower block 12, and is in close contact with the strip 150 and the block 11 and 12, respectively. The driving means for moving the operating cylinder is installed inside the seal box 130 to face the slit of the blocking plate and the seal rod 30 is axially rotatably coupled to the piston rod end via the bracket (31) ( 32, a rack bar 33 installed on the inner side of the seal box 130 and installed in parallel with the operation cylinder 32 and having a rack 34 at the top thereof, and a bracket 31 of the operation cylinder 32. And a pinion gear 35 which is installed on the rack 34 and is engaged with the rack 34.

Therefore, when the operation cylinder 32 is stretched and operated, the seal roll 30 is disposed between the blocking plate and the strip 150 while the bracket 31 is supported by the rack bar 33 via the pinion gear 35 and the rack 34. You will be able to proceed towards.

On the other hand, the removing means is a pressing member 36 located between the bracket 31 and the seal roll 30 axially coupled to the bracket 31, as shown in Figure 4, the pressing member 36 is attached to the rear Is installed and elastically installed between the operating rod 37, the seat member 38 installed on the bracket 31 and the operating rod 37 installed through the bracket 31 through the hole formed in the bracket 31 An elastic spring 39 for pushing the operation rod 37 toward the seal roll 30, and a pad 40 installed on the bracket 31 to cover the pressing member 36.

Accordingly, the pressing member 36 is brought into close contact with the pad 40 by the elastic force of the elastic spring 39, and thus foreign matters on the seal roll 30 are wiped off by the pad 40. The gap between the seal roll 30 and the strip 150 may be prevented.

Here, the driving means for moving the seal roll 30 and the seal roll 30 and the removal means applied to the seal roll 30 are applied to all seal rolls 30 installed in the middle block plate 11 and the lower block plate 12. Since the same applies to the structure description for the lower blocking plate 12 will be omitted.

On the other hand, between the upper block plate 10 and the middle block plate 11 and between the middle block plate 11 and the lower block plate 12 is provided with an internal space made by each block plate, in this space Nitrogen gas is introduced through the nitrogen gas injecting means of the present embodiment to maintain airtightness.

The nitrogen gas inlet means includes a nitrogen gas supply hose 41 connected to each of the internal spaces to supply nitrogen gas.

Unexplained reference numeral 42 is a valve installed in the supply hose 41, 43 is installed on one side of the seal box 130, the hydrogen remaining inside the seal box 130 when the cover 51 is opened It is a hydrogen detector for detecting whether or not.

Hereinafter, the operation of the present invention will be described with reference to FIG. 5.

If foreign matter is deposited on the dance roll 50 during normal operation of the line, the device is operated to seal the gap between the inlet seal box 130 and the upper heating furnace to immediately cover the seal box 130 without replacing the atmosphere gas. Opening the 51 can be performed such as cleaning the dance roll 50.

That is, when the operator operates the apparatus, the driving cylinder 21 and the operation cylinder 32 are extended to strip the failed rod 20 and the seal roll 30 installed at the tip of the piston rod 37 of each cylinder. It is moved toward the 150 and the failed 20 is in close contact between the top blocking plate 10 and the strip 150 to maintain the airtight of the top of the seal box (130).                     

The seal roll 30 also proceeds toward the slit of the blocking plate to closely contact between the blocking plate and the strip 150 to be connected to the spool 20 so that the airtight plate between the middle blocking plate and the lower blocking plate 12 and the strip 150 is sealed. Will be maintained.

When the driving cylinder 21 and the operation cylinder 32 are fully extended and operated, the valve of the nitrogen gas supply hose 41 is opened to open the space between the upper blocking plate 10 and the intermediate blocking plate 11 and the intermediate blocking plate 11. The nitrogen gas is charged into the space between the bottom and the lower blocking plate 12, and the low pressure correction hydrogen supply valve, which is always supplied, blocks the supply according to the conditions of the low pressure.

As such, when the hydrogen in the inlet seal box 130 falls below 4% according to the confidentiality and the nitrogen supply, the hydrogen detector installed in the seal box 130 detects this and informs an alarm.

Therefore, the operator can clean the dance roll 50 by opening the cover 51 of the seal box 130.

On the other hand, after checking the dance roll 50, the cover 51 of the seal box 130 is closed, and when the oxygen in the seal box 130 falls below 0.04% by supplying nitrogen, the driving cylinder 21 and the operation cylinder ( 32) by reducing the operation so that the inlet seal box 130 is filled with hydrogen gas.

In the case of the seal roll 30, the pad 40 is adhered to the rear of the seal roll 30 in a state in which the seal roll 30 is in close contact with the strip 150, thereby wiping off the foreign matter from the seal roll 30.

That is, the pad 40 is installed on the bracket 31 with the pressing member 36 interposed therebetween, and the pressing member 36 continuously holds the pad 40 by the elastic force of the elastic spring 39. The pad 40 is pressed toward the seal, and the pad 40 is brought into close contact with the seal roll 30 at a constant pressure.

Therefore, when the seal roll 30 rotates in the above state, the foreign matter on the surface of the seal roll 30 is wiped off by the pad 40.

According to the annealing furnace inlet seal box opening device according to the present invention as described above, by providing the failed and seal rolls on the upper and lower sides of the outlet of the inlet seal box to seal the upper end of the inlet seal box separately to separate the hydrogen gas and inside the furnace Unlike the prior art, which completely purges the furnace with nitrogen gas to lower the furnace temperature and then performs the break recovery operation, it facilitates the cleaning work such as dance rolls, and shortens the maintenance time required for the recovery work, thereby decreasing productivity according to the line down time. Can be minimized.

Claims (4)

A plurality of blocking plates which are sequentially installed on the inlet seal box of the bright annealing furnace at a predetermined interval and the strip proceeds through the center slit, and are located on both sides of the strip at the lower part of the blocking plate located at the top of the blocking plates. Failed to be in close contact with both sides of the blocking plate and the strip located in the upper side, the drive cylinder inclined toward the slit of the uppermost blocking plate located inside the seal box and connected to the bottom of the failed, the top blocking Located at the bottom of each block plate located below the plate to seal each of the barrier plate and the strip on both sides of the seal roll, drive means for selectively contacting the seal roll to the strip, is installed in close contact with the seal roll to wipe the surface of the seal roll to increase the adhesion Including means for removal, The removal means is installed on a bracket in which the seal roll is rotatably axially coupled to the pressing member positioned between the bracket and the seal roll, and is attached to the rear side of the pressing member and is installed through the hole formed in the bracket to penetrate the mounting rod. An elastic inlet seal box opening device comprising an elastic spring installed between the seat member installed on the bracket and the actuating rod to push the actuating rod toward the silol, and a pad installed on the bracket to cover the pressing member. . According to claim 1, The driving means is installed in the seal box toward the slit of the blocking plate and the piston rod end of the operation cylinder and the seal roll rotatably coupled via the bracket, the seal box inner surface An annealing furnace inlet seal box which is installed in parallel with the operation cylinder and has a rack formed on the top of the rack, and a pinion gear rotatably installed on the bracket of the operation cylinder and engaged with the rack. Opening device. delete  The annealing inlet seal box opening device according to claim 1 or 2, wherein a supply hose is connected to an internal space provided by the blocking plate to inject a nitrogen gas for hermetic maintenance.

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