KR101182087B1 - Structure for attaching-detaching heat exchanger of pickling tank - Google Patents

Abstract

The present invention relates to a heat exchanger detachable structure of a pickling tank which can separate a heat exchanger even during a line production operation to replace the heat exchanger itself or accessories. In the detachable structure of the heat exchanger installed inside the pickling bath used in the pickling process of stainless steel according to the present invention, a fixing part fixed to the inner wall of the pickling bath; A heat exchange part in which a part of the pickling solution is immersed in the pickling tank; And a connection part configured to connect the heat exchange part to the fixing part in a detachable manner. By such a configuration, workability and productivity can be improved.

Description

Structure for attaching-detaching heat exchanger of pickling tank

The present invention relates to a heat exchanger detachable structure of a pickling bath, and more particularly, to a heat exchanger detachable structure of a pickling bath in which workability and productivity can be improved.

In general, stainless steel slabs are subjected to annealing heat treatment for recrystallization and stress relief after hot and cold rolling. Since the annealing heat treatment is performed in an oxidizing atmosphere, the oxide scale formed on the surface of the strip must be removed through a pickling process to produce a stainless steel sheet having a smooth surface state.

Known stainless steel cold rolled steel sheets after annealing are generally classified into molten salt pickling methods and neutral salt pickling methods. In the pickling method using molten salt, pretreatment in molten salt is performed, followed by a sulfuric acid tank deposition process, nitric acid electrolysis, and then a mixture of nitric acid and hydrofluoric acid. In the neutral salt electrolytic pickling method, after the neutral salt is electrolyzed, nitric acid is electrolyzed and immersed in a mixed acid tank of nitric acid and hydrofluoric acid.

In this pickling process, a heat exchanger is installed inside the pickling tank, and the pickling efficiency can be improved by increasing the temperature of the pickling solution.

An object of the present invention is to provide a heat exchanger detachable structure of the pickling tank which can be replaced inside the pickling bath to easily remove the heat exchanger, thereby replacing the heat exchanger even during the line production operation and replacing the heat exchanger itself or accessories.

In the detachable structure of the heat exchanger installed inside the pickling bath used in the pickling process of stainless steel according to the present invention, a fixing part fixed to the inner wall of the pickling bath; A heat exchange part in which a part of the pickling solution is immersed in the pickling tank; And a connection part configured to connect the heat exchange part to the fixing part in a detachable manner.

Here, the fixing part includes a contact part fixed to the inner wall of the pickling bath, an extension part extending horizontally from the contact part with the bottom surface of the pickling bath, and at least one connection hole through which the connection part passes. can do.

The connection hole may further include a support member having a tubular shape.

The heat exchange part may include a U-shaped heat exchanger tube immersed in the pickling solution, a pair of frame members formed to face each other along the longitudinal direction of the heat exchanger tube, and support means connected to both ends of the frame member; It may include a steam induction line extending from the support means to the outside of the pickling tank and detachable means detachable to one region of the steam induction line.

At this time, the steam induction line may include a double pipe formed inside of Teflon, the outside of stainless steel.

The apparatus may further include at least one binding band formed along a circumference of the heat exchange tube and the frame member.

Furthermore, the connection part may include at least one connection member having one end penetrating through the connection hole of the extension part and the other end fixed to the heat exchange part, and one end penetrating through the connection hole of the extension part. It is connected, and the other end may include a binding adjustment unit that is mounted to bind or release the heat exchange unit.

In addition, the binding adjustment unit is a housing formed with a through hole penetrated to the upper end along the inside, the upper and lower conveyance groove formed in one area and the lower fixing member for supporting the heat exchanger at the lower end; A transfer member positioned inside the housing, one end protruding above the through hole; And an upper fixing member connected to the other end of the transfer member so as to be exposed to the outside of the transfer groove, and configured to bind or release the heat exchange unit as the transfer member moves up and down.

According to the present invention, since the heat exchanger can be separated and the heat exchanger itself or accessories can be replaced even during the line production operation, workability and productivity can be improved.

1 is a cross-sectional view generally showing a state in which a heat exchanger is installed in a pickling tank.
2 is a cross-sectional view showing a state in which a heat exchanger is installed in a pickling tank according to the present invention.
3 is a cross-sectional view showing a state in which the heat exchanger is separated from the pickling bath according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to embodiments of the present invention and other details necessary for those skilled in the art to understand the present invention with reference to the accompanying drawings. However, the present invention may be embodied in various different forms within the scope of the claims, and thus the embodiments described below are merely exemplary, regardless of expression.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. It should be noted that the same elements in the drawings are represented by the same reference numerals and symbols as much as possible even though they are shown in different drawings. In addition, prior to describing the present invention, although the terms heat exchanger and heat exchanger are both used, they all refer to the same component.

1 is a cross-sectional view generally showing a state in which a heat exchanger is installed in a pickling tank.

Referring to FIG. 1, pickling is performed to remove an oxide scale formed on the strip S after hot rolling and cold rolling. In this case, in order to increase the temperature in the pickling solution (9) to increase the pickling efficiency, a heat exchanger (4) having a steam induction line (2) is used.

When the heat exchanger 4 is used, the strip S is moved by the feed roll 6 while being immersed in the pickling solution 9, so that the pickling solution 9 is slumped. At this time, the water level (A) of the pickling solution (9) is located in one region of the steam induction line (2). In the pickling solution 9, the fixing members 5 and 7 bound to the pickling tank inner surface 1 by the fastening members 5a and 7a such as nuts are immersed in the pickling solution 9. This causes frequent separation corrosion or breakage separation of the fixing members 5, 7.

As such, due to the lingering of the pickling solution 9, it is difficult to replace the heat exchanger 4 during the production of the line. Thereby, after stopping production of the line, the pickling solution 9 is drained and the heat exchanger 4 is repaired. However, such a line stop production has a problem that the productivity is significantly reduced.

Therefore, the present invention proposes a heat exchanger detachable structure of a pickling tank of another embodiment, which is easily detachable so as to solve the problem of heat exchanger separation due to solution fluctuations during line production. In addition, the heat exchanger detachable structure of the pickling tank which can easily exchange the heat exchanger without stopping the line even if the heat exchanger is disconnected during the line production operation.

2 is a cross-sectional view showing a state in which a heat exchanger is installed in a pickling bath according to the present invention.

2, the detachable structure of the heat exchanger 20 installed inside the pickling tank 40 used in the pickling process of stainless steel according to the present invention is largely fixed part 10, heat exchanger 20 and the connecting portion 30 ).

The fixing part 10 is fixed to the inner wall of the pickling tank 40, the heat exchange part 20 is partially immersed in the pickling solution 42 inside the pickling tank (40). In addition, the connection part 30 may be connected to the fixing part 10 to be detachable from the heat exchanger 20.

Hereinafter, the configuration of each of the detachable structures of the heat exchanger 20 will be described in more detail.

First, the fixing part 10 includes a contact part 11, an extension part 12, and a connection hole 12a. The contact portion 11 is in contact with the inner wall of the pickling bath 40, the fastening member such as bolt 15 is fastened and fixed to the fixing hole 14 formed in the contact portion. In addition, the extension part 12 extends horizontally from the contact part 11 to the bottom surface of the pickling bath 40, and the extension part 12 has at least one connection hole 12a through which the connection part 30 passes. It may include. In addition, the lower portion of the connection hole 12a may further include a support member 13 having a tubular shape. Here, the supporting member 13 serves to support the connecting member 32 when the connecting member 32 of the connecting portion 30 to be described later passes through the connecting hole 12a.

The heat exchange part 20 includes a heat exchange tube 21, a pair of frame members 22, a support means 23, a steam induction line 24, and detachable means 25a and 25b. The heat exchange tube 21 is formed in a U-shape and is immersed in the pickling solution 42, and a pair of frame members 22 are formed along the longitudinal direction of the heat exchange tube 21. And, both ends of the frame member 22 is connected to the support means 23, the steam induction line 24 is extended from the support means 23 to the pickling tank (40). Both ends of the frame member 22 are connected to the support means 23 by fastening members such as bolts 27a and nuts 27b.

In addition, a region of the steam induction line 24 to which steam is supplied further includes detachable detaching means 25a and 25b. Detachable means (25a, 25b) may be formed in a rectangular flange shape, hundreds of waveforms may be formed in the heat exchange tube 21 connected to the lower portion of the steam induction line (24). At this time, the steam induction line 24 may include a double pipe formed inside of the Teflon 24a and outside of the stainless steel 24b. As a result, the durability of the steam induction line 24 may be increased, thereby enabling long-term use.

In addition, at least one binding band 27 may be further formed along the circumference of the heat exchange tube 21 and the frame member 22. The binding band 27 serves to bind the heat exchange tube 21 and the frame member 22 more firmly.

Finally, the connecting portion 30 includes at least one connecting member 32 and the binding adjusting unit 31. The binding adjusting unit 31 of the connection portion 30 is a portion for fixing the heat exchange unit 20. One end of the connection member 32 passes through the connection hole 12a of the extension part 12 and is detachably connected by a fastening member such as a bolt 33 and a nut 34. In addition, the other end of the connection member 32 may be fixed to the support means 12 of the heat exchange unit 20.

In addition, one end of the binding adjusting unit 31 may pass through the through hole 35 of the extension part 12 and may be detachably connected by a fastening member such as a bolt 38a and a nut 38b. The other end of the binding adjusting unit 31 may be mounted to bind or release the heat exchange tube 21.

More specifically, the binding adjusting unit 31 includes a housing 37, a transfer member 38 and the upper fixing member 39a. The housing 37 has a through hole 35 penetrated to its upper end along the inside thereof, and a transfer groove 36 is formed in one region of the housing 37, and a lower fixing member supporting the heat exchanger 20 at the lower end thereof. 39b may be formed. In addition, the transfer member 38 is positioned inside the housing 37, and one end thereof protrudes through the through hole 35. In addition, the upper fixing member 39a is connected to the other end of the conveying member 38 so as to be exposed to the outside of the conveying groove 36, thereby binding or releasing the heat exchange part 20 as the conveying member 38 moves up and down. It may be mounted to.

Here, the adjusting handle 100 fixed to one end of the binding adjusting unit 31 is adjusted to bind the heat exchange tube 21 to the upper fixing member 39a. The heat exchanger 20 may be fixed by fixing the contact portion 11 to the inner wall of the pickling bath 40.

In FIG. 2, reference numeral S denotes a strip, and 41 denotes a feed roll 41 for transferring the strip.

3 is a cross-sectional view showing a state in which the heat exchanger is separated from the pickling bath according to the present invention.

Referring to FIG. 3, the fixing unit 10 (see FIG. 2), the heat exchange unit 20 (see FIG. 2), and the connection unit 30 (see FIG. 2) may be disassembled from the pickling bath 40 (see FIG. 2).

The contact portion 11 of the fixing portion 10 fixed to the inner wall of the pickling tank 40 by the fastening means such as the bolt 15 disassembles the bolt 15 from the fixing hole 14 to release the binding. In addition, the connection member 32 fixed to the connection hole 12a of the extension part 12 is released from the fixing part 10 as the fastening means such as the bolt 33 and the nut 34 are disassembled. . In addition, the binding adjustment unit 31 also releases the binding with the fixing unit 10 as the bolt 38a and the nut 38b connected to the through hole 35 of the extension unit 12 are disassembled.

In addition, in the heat exchange part 20, the detachable members 25a and 25b such as the square flange are released from the detachable members 25a and 25b as the fastening means such as the bolt 25c and the nut 25d are disassembled.

Here, by pulling the adjustment handle 100 formed at one end of the transfer member 38 protruding into the housing 37 to the upper side, the binding adjustment unit so as to widen the interval between the upper fixing member 39a and the lower fixing member 39b. The 31 can release the binding between the heat exchange tube 21 and the frame member 22. At this time, by moving the transfer member 38 up and down, the upper fixing member (39a) can also move up and down along the transfer groove (36).

Disassembly of the heat exchange part 20 is made by disassembly of the detachable means 25a and 25b connected to the steam induction line 24 to which steam is supplied to the upper end of the heat exchange tube 21, or the union part 26.

The heat exchanger detachable structure of the pickling bath according to the present invention can separate the heat exchanger immersed in the pickling solution of the pickling bath from the outside of the pickling solution, and can be easily installed in the pickling bath. As described above, the accessory fixed in the pickling solution by the detachable structure of the present invention can be solved by removing the replacement of the heat exchanger due to corrosion or solution fluctuation from the outside of the pickling solution. That is, it is possible to disassemble and assemble the heat exchanger outside the pickling solution so that the work after draining the pickling solution after stopping the line when the heat exchanger is abnormal can be made possible even when the solution is contained.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be apparent to those skilled in the art that various modifications may be made without departing from the scope of the present invention.

The scope of the above-described invention is defined in the following claims, which are not bound by the description of the specification, and all modifications and variations belonging to the equivalent scope of the claims will belong to the scope of the present invention.

10: fixed part 11: contact part
12 extension portion 13 support member
14: fixing hole 20: heat exchanger
21: heat exchange tube 22: frame member
23: support means 24: steam induction line
25a, 25b: Detachable means 26: Union
30: connection 31: binding adjustment unit
32: connecting member 35: through hole
36: transfer groove 39a: upper fixing member
39b: lower fixing member 40: pickling tank
41: feed roll 42: pickling solution

Claims (8)

In the detachable structure of the heat exchanger installed inside the pickling bath used in the pickling process of stainless steel,
A fixing part fixed to the inner wall of the pickling bath;
A heat exchange part in which a part of the pickling solution is immersed in the pickling tank; And
A heat exchanger detachable structure of a pickling bath comprising a; connection part for detachably connecting the heat exchange part to the fixing part. The method of claim 1,
The fixing part includes a contact part which contacts and is fixed to an inner wall of the pickling bath, an extension part extending horizontally from the contact part with the bottom surface of the pickling bath, and at least one connection hole through which the connection part passes. Joe heat exchanger detachable structure. The method of claim 2,
Heat exchanger detachable structure of the pickling tank further comprises a support member in the form of a tube below the connection hole. The method of claim 1,
The heat exchange part, a U-shaped heat exchanger tube immersed in the pickling solution, a pair of frame members formed to face in the longitudinal direction of the heat exchange tube, support means connected to both ends of the frame member, and the support And a steam induction line extending from the means to the outside of the pickling tank and a detachable means detachable to a region of the steam induction line. The method of claim 4, wherein
The steam induction line is a heat exchanger detachable structure of the pickling tank including a double pipe formed inside of the Teflon, stainless steel outside. The method of claim 4, wherein
Heat exchanger detachable structure of the pickling tank further comprises at least one binding band formed along the circumference of the heat exchange tube and the frame member. The method of claim 2,
The connecting portion, one end thereof is connected to the connecting hole of the extension and detachable, the other end is connected to the at least one connecting member is fixed to the heat exchanger, one end is connected to the connecting hole of the extension and detachably And a heat exchanger detachable structure of a pickling tank including a binding adjusting unit mounted on the other end to bind or release the heat exchange unit. The method of claim 7, wherein
The binding adjusting unit has a through hole penetrated to the upper end along the inside, a transfer groove formed in one region and a lower fixing member for supporting the heat exchange unit at the lower end; A transfer member positioned inside the housing, one end protruding above the through hole; And an upper fixing member connected to the other end of the conveying member so as to be exposed to the outside of the conveying groove, and configured to bind or release the heat exchange part as the conveying member moves up and down.

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