KR20020026037A - Seal box of bright annealing furnace - Google Patents

Abstract

PURPOSE: A sealed box of a furnace is provided to suppress a fire early, to correct the shape inferiority of a strip, and to protect the strip from any falling objects by removing the falling objects. CONSTITUTION: The sealed box(10) installed at the entrance side of a furnace comprises a fire suppress part; a spreading prevention part installed in a vertical standing portion for preventing a fire from being propagated upward; a gripping part for gripping a strip(200) in an emergency situation so as to prevent the broken strip from being dropped into the box; and an impurities collecting part for processing any impurities dropped from the furnace.

Description

Seal box of bright annealing furnace

The present invention relates to a bright annealing furnace for bright annealing stainless cold rolled coil, in particular, in a closed box of a bright annealing furnace to prevent the contamination of the strip by extinguishing it properly and protecting the strip in the event of a fire in the bright annealing furnace. It is about.

In general, bright annealing is a cold rolled strip that prevents decarburization on the surface of the steel and is annealed in a stream of reducing or non-oxidizing gas so as not to lose metallic luster. There is a characteristic that keeps it as it is.

The bright annealing uses hydrogen as an atmospheric gas to prevent oxidation and glossiness deterioration during heat treatment. The bright annealing furnace uses a vacuum furnace in which the entrance and exit of the strip are sealed to prevent the outflow of hydrogen. Will be used.

1 is a view showing a general bright annealing furnace, the strip 200 is introduced into the lower portion of the furnace 100 through the inside of the return duct 104 installed vertically through the cooling table 102 installed on the upper body. It is supposed to come out below.

A sealed box 106 is installed at the strip inlet portion of the furnace 100, and a plurality of seal rolls 110 are disposed on the upper and lower surfaces of the strip 200 in the sealed box 106 so that the sealed box 106 enters the strip 200. 106) will be kept confidential.

In addition, the vertical part of the sealed box is provided with a gripping member operated by a cylinder on the left and right sides of the strip to grip the strip when breaking the strip to prevent the strip from accumulating in the seal box.

However, the conventional hermetically sealed box has a problem in that a scratch is caused by the strip contacting the gripping member due to a strip shape deformation according to a temperature rise, and, in addition, when a fire occurs in the strip entry part of the hermetic box, it is discharged to the gap of the seal roll. Due to the hydrogen gas is difficult to extinguish, there is a problem in that the dance roll is contaminated by the fall of the softening material from the top of the furnace to cause the indentation or stain generation on the strip.

Accordingly, the present invention has been made to solve the above problems, it is possible to extinguish the fire early in the event of a fire in the closed box, and to correct the strip shape and to remove the upper falling objects to protect the strip The purpose is to provide a sealed box of a bright annealing furnace.

1 is a schematic view showing a general bright annealing furnace,

2 is a perspective view showing a sealed box according to the present invention,

3 is an exploded perspective view of FIG. 2 according to the present invention;

4 is a schematic cross-sectional view of a sealed box according to the present invention.

Explanation of symbols on the main parts of the drawings

10: sealed box 11,12: fire detection sensor

13: nitrogen supply hose 20: drive cylinder

21: blocking plate 22: blocking roll

30: working cylinder 31: holding member

40: collecting box 41: nitrogen injection hose

42: discharge port 43: discharge pipe

44: storage box 45: guide plate

In order to achieve the object as described above, the sealed box according to the present invention is installed on the side of the strip entry portion, the fire suppression unit for extinguishing the fire properly, and the diffusion prevention unit for preventing the spread of the fire is installed on the top, It is provided with a gripping portion to be installed on the top to prevent falling into the sealed box by holding the strip falling along the strip breaking, and a foreign matter collecting portion for receiving and processing foreign matter falling into the sealed box from the top of the annealing furnace.

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

Figure 2 is a perspective view showing a sealed box according to the present invention, Figure 3 is an exploded perspective view of Figure 2 according to the present invention.

According to the above drawings, the sealed box 10 installed at the mouth side of the bright annealing furnace 100 has an inlet at which a strip 200 enters and an upper portion thereof is opened to be connected to the inside of the furnace 100.

At the inlet, two seal rolls 110 are attached to the upper and lower surfaces of the strip 200 to maintain the outside and airtightness. The dance roll 120 is installed inside the box to guide the strip 200 vertically and at the same time. Tension is given to 200.

Wherein the present invention in the sealed box 10 of the above-described structure, the fire suppression unit for detecting and extinguishing the fire is installed at the inlet side, and installed in the vertically vertical upper part that the fire propagates to the furnace 100 A gripping portion for preventing a diffusion preventing portion, a gripping strip 200 in emergency situation to prevent the strip 200 falling due to the strip 200 breaks into the sealed box 10 and an annealing furnace ( 100) includes a foreign matter collecting unit for receiving and processing foreign matter falling into the sealed box 10 from the top.

The fire suppression unit is installed inside the inlet side of the sealed box 10 to detect the fire (11, 12) for detecting the fire, and connected to the inside from the bottom of the sealed box 10, the fire sensor (11, 12) It includes a nitrogen gas supply hose 13 for supplying nitrogen gas into the sealed box 10 according to the signal of the).

The detection sensors 11 and 12 are respectively installed on the outside and the inside of the sealed box 10 to detect all the fires generated from the inside and the outside around the silol 110.

The diffusion preventing part is installed on the left and right sides of the upper side of the sealed box 10 and is horizontally disposed at the tip of the piston rod of the drive cylinder 20 and the drive cylinder 20 entered into the sealed box 10. It is installed as a blocking plate 21 to block the rise of the flame, the blocking plate 21 is connected rotatably to the front end includes a blocking roll 22 in close contact with the left and right surfaces of the strip 200 placed vertically.

Therefore, when the blocking roll 22 is brought into close contact with the strip 200 according to the operation of the driving cylinder 20, the upper outlet of the closed box 10 is blocked by the blocking roll 22 and the blocking plate 21, and the flame propagates. Is blocked.

The blocking roll 22 becomes an idle roll and rotates together as the strip 200 progresses.

Here, the blocking rolls 22 installed on the left and right sides of the strips 200 are provided with a predetermined height difference as shown in FIG. 4. The reasons for the different mounting heights are explained later.

On the other hand, the gripping portion of the present invention is installed at the end of the piston rod of the operation cylinder 30 and the operation cylinder 30 introduced into the closed box 10, the outer side of the sealed box 10, the strip 200 It comprises a gripping member 31 for pressing the strip 200 on one side of the gripping roll located on the opposite side.

The gripping member 31 is bent inward in the same circular arc shape as the blocking roll 22 to be in close contact with the blocking roll 22 with the strip 200 therebetween.

In this way, the one side blocking roll 22 is coupled to the holding member 31 to hold the strip 200, so that the installation positions of the blocking roll 22 placed on the left and right sides of the strip 200 are different.

In addition, the collecting unit is connected to the collecting box 40 and the collecting box 40 which is installed on the blocking plate 21, the outer side of the sealed box 10, the injection box 40 for injecting nitrogen gas into the collecting box 40 It is connected to the discharge port 42 formed on the bottom of the hose 41, the collecting box 40, the discharge pipe 43 which is installed downward along the side of the sealed box 10, the discharge pipe 43 is placed in the lower discharge pipe 43 It comprises a storage box 44 for containing the foreign matter.

The storage box 44 is installed in close contact with the side of the sealed box 10 and has a structure in which opening and closing doors are installed to open the storage box 44 at the outside of the sealed box 10. Therefore, when a certain amount of foreign matter is accumulated in the storage box 44, the foreign matter can be easily taken out and processed from the outside of the sealed box 10.

In addition, the sealing box 10 is provided with a guide plate 45 for inducing foreign matter falling toward the discharge port 42, the guide plate 45 is fixed to the side of the sealed box 10 and the strip 200 It is inclined downward and has a tapered structure to decrease in size toward the outlet 42 from the nitrogen injection hose 41.

Hereinafter will be described the operation of the present invention.

Fire detection sensor 11 installed inside and outside the sealed box 10 when a fire occurs outside the sealed box 10 due to hydrogen gas leaking from the inside of the sealed box 10 or the seal roll 110 of the sealed box 10. The fire occurrence is detected by 12, and nitrogen is injected through the nitrogen gas supply hose 13 according to the signals of the sensors 11 and 12.

Nitrogen injected into the sealed box 10 purges hydrogen to quickly extinguish the internal and external fires.

In addition, at the same time as supplying nitrogen, the driving cylinder 20 installed on the side of the sealed box 10 is extended to move the blocking plate 21 connected to the end of the piston rod toward the strip 200.

As the blocking plate 21 moves, the blocking roll 22 installed at the tip of the blocking plate 21 is in close contact with the strip 200 at the left and right sides of the strip 200 to block the sealed box 10. Therefore, the fire generated inside the sealed box 10 is not propagated to the upper part of the furnace 100, and as mentioned above, it can be quickly extinguished by the purged nitrogen gas.

When the fire is extinguished, the supply of nitrogen gas is also interrupted according to the signals of the detection sensors 11 and 12, while the blocking roll 22 returns to its original position.

In addition, when the strip 200 is broken in the upper part of the furnace 100, the dance roll 120 which maintains the tension of the strip 200 falls and immediately detects a signal according to the dance roll 120 lowering. 30 is extended to move the gripping member 31 inside the sealed box 10 toward the strip 200.

Here, since the blocking roll 22 is located opposite the strip 200 at the position corresponding to the gripping member 31, when the gripping member 31 is moved by the operation cylinder 30 as described above, the strip 200 is gripped. The lowering is controlled in close contact between the member 31 and the blocking roll 22.

Therefore, the strip 200 broken and dropped from the upper part of the furnace 100 is not placed in the sealed box 10, but is placed above the sealed box 10, that is, above the holding member 31.

On the other hand, the blocking roll 22 is also located in close proximity to or close to the strip 200 to perform an auxiliary function of correcting the bent portion of the strip 200, etc., in the upper portion of the furnace 100 during the strip 200 All the foreign matter falling down and the softening material and the like are collected to fall into the collecting box 40 on the blocking plate 21.

That is, the dropped foreign matter is installed on the blocking plate 21 and dropped in the collecting box 40 placed on the left and right sides of the strip 200, and the separated foreign matter is collected in the collecting box 40 and the discharge pipe installed at one side of the collecting box 40 ( 43 is dropped into the storage box 44 of the bottom of the sealed box (10).

Here, the foreign matter dropped to the collecting box 40 is collected toward the discharge port 42 along the inclined surface of the guide plate 45, the set time interval by the timer through the injection hose 41 installed on one side of the collecting box 40 By the nitrogen gas injected into the foreign matter is pushed to the outlet 42 is to be collected into the storage box 44 through the discharge pipe 43 connected to the outlet 42.

The storage box 44 is opened through an opening / closing door installed outside the sealed box 10 to easily clean the foreign matter therein.

According to the sealed box of the bright annealing furnace according to the present invention as described above, there is an advantage that it is possible to easily extinguish the fire generated before and after the silol of the sealed box and to prevent the fire from spreading into the furnace to reduce equipment accidents.

In addition, it is possible to promptly solve the accident by coping with various accidents generated in the sealed box such as the stacking of strips or falling of foreign substances due to the breaking of the strip.

Claims (3)

In the sealed box of the bright annealing furnace, It is installed inside the inlet of the sealed box and connected to the fire detection sensor to detect the fire and connected to the inside of the bottom of the sealed box to supply the nitrogen gas to the inside of the sealed box according to the signal of the fire detection sensor. Fire suppression unit for extinguishing the fire is made; Drive cylinders installed on the left and right sides of the sealed box and inserted into the sealed box, horizontally installed at the tip of the piston rod of the drive cylinder entered into the sealed box, can be rotated at the end of the blocking plate and blocking plate to block the rise of flame. A diffusion prevention part for preventing a fire generated from the closed box from spreading to the upper part of the furnace, including a blocking roll contacting the left and right sides of the strip vertically connected to each other; Milpex box of bright annealing furnace comprising a. The gripping member of claim 1, further comprising: a gripping member installed at an upper side of the upper side of the sealed box and a gripping member installed at a tip of the piston rod of the actuated cylinder introduced into the closed box to press the gripping roll on one side of the gripping roll opposite to the strip. Including, the gripping annealing box of the bright annealing furnace further comprises a gripping portion for preventing the flow of the strip falling in accordance with the strip breaking into the sealed box. According to claim 1 or claim 2, wherein the collecting box is installed on the blocking plate, and the outer side of the closed box is connected to the collecting box one side for the injection hose for injecting nitrogen gas by collecting, connected to the outlet formed on the bottom of the collecting box A discharge box that is installed downward along the side of the sealed box, is disposed below the discharge pipe, and is openly installed through the side of the closed box, and includes a storage box for containing foreign substances discharged through the discharge pipe, and falls from the upper part of the annealing furnace to the closed box. Sealing box of the bright annealing furnace further comprises a foreign matter collecting unit for receiving and processing the foreign matter.