Copper strip cleaning equipment

Abstract

The present application relates to the technical field of cleaning equipment, and discloses a copper strip cleaning equipment, including a moving module and a pickling module, and also including a polishing module, wherein the polishing module includes a polishing shell, two polishing brushes and a polishing drive, wherein the polishing brush is rotatably connected to the polishing shell, and the polishing drive is used to drive the polishing brush to rotate, and the polishing brush abuts against the copper strip. In the present application, the copper strip abuts against the polishing brush, and the polishing drive drives the polishing brush to rotate, so that the polishing brush polishes the copper strip, thereby completely removing the copper oxide on the copper strip, reducing the problem of the copper strip needing to be cleaned again, and greatly reducing the problem of incomplete cleaning of the copper strip.

Description

Technical Field

[0001] The present application relates to the technical field of cleaning equipment, and in particular to a copper strip cleaning equipment. Background Art

[0002] Copper tape is a common metal component that is widely used. When the copper tape is stored for a long time, it will be oxidized and a layer of black copper oxide will form on the surface of the copper tape. The copper oxide will affect the conductivity of the copper tape, so the copper tape needs to be cleaned before it can be used again.

[0003] In the related art, the cleaning equipment includes a moving module and a pickling module. The moving module is used to reel the copper strip and move the copper strip in the pickling module. The pickling module is used to pickle the copper strip.

[0004] Due to the different depths of copper oxide in the copper strip, the deeper copper oxide may not be easily cleaned by the pickling module in a short time, so that copper oxide may still remain in the copper strip after cleaning, resulting in the need for secondary cleaning of the copper strip, making the cleaning of the copper strip more troublesome. Summary of the invention

[0005] In order to improve the problem of incomplete cleaning of copper strips, the present application provides a copper strip cleaning device.

[0006] The present application provides a copper strip cleaning device, which adopts the following technical solution:

[0007] A copper strip cleaning device comprises a moving module and a pickling module, and also comprises a polishing module, wherein the polishing module comprises a polishing shell, two polishing brushes and a polishing drive, wherein the polishing brush is rotatably connected to the polishing shell, and the polishing drive is used to drive the polishing brush to rotate, and the polishing brush abuts against the copper strip.

[0008] By adopting the above technical solution, the copper belt is abutted against the polishing brush, and the polishing drive drives the polishing brush to rotate, so that the polishing brush polishes the copper belt, thereby allowing the copper oxide on the copper belt to be completely removed, reducing the problem of the copper belt needing to be cleaned again, and greatly reducing the problem of incomplete cleaning of the copper belt.

[0009] Optionally, the device further includes a cleaning module and a drying module, wherein the cleaning module includes a flushing pipe, wherein the flushing pipe is used to flush the copper strip, and the drying module includes a drying shell and a drying pipe, wherein the drying pipe is arranged in the drying shell, and wherein the drying pipe is used to dry the copper strip.

[0010] By adopting the above technical solution, the copper belt is flushed through the flushing pipe, and then the copper belt passes through the drying shell to be dried, so that it is not easy to retain water during the winding process of the copper belt, thereby reducing the possibility of the subsequent copper belt being corroded by water; at the same time, after the polished copper belt is cleaned by the cleaning module, the possibility of polishing debris on the copper belt sticking to the copper belt is reduced, so that the copper belt can be neater.

[0011] Optionally, the pickling module includes a pickling tank and a pickling cover, the pickling tank is provided with a receiving groove for cleaning the copper strip, the pickling cover is used to seal the opening of the receiving groove, and the pickling tank is provided with a through hole for the copper strip to pass through.

[0012] By adopting the above technical solution, the pickling cover is used to seal the opening of the receiving tank, so that the cleaning liquid in the receiving tank will not splash to the outside, reducing the possibility of the cleaning liquid polluting the external environment or harming the staff; the copper belt is perforated, so that the copper belt can be stably pickled in the pickling tank.

[0013] Optionally, a stop strip is provided on the pickling tank, an elastic strip is provided on the pickling cover, a stop hole for inserting the stop strip is opened on the elastic strip, and when the stop strip is located in the stop hole, the pickling cover blocks the accommodating groove.

[0014] By adopting the above technical solution, the elastic strip is pulled and the stop strip is inserted into the stop hole, so that the pickling cover can be fixed on the pickling tank, reducing the possibility of the pickling cover moving on the pickling tank, so that the pickling cover can more stably seal the receiving tank and reduce the possibility of the cleaning liquid escaping from the receiving tank.

[0015] Optionally, a through hole is provided on the pickling tank for the cleaning liquid to pass through, a limit plate for blocking the through hole is slidably connected in the receiving groove, the limit plate is meshedly connected to the limit gear, an operating bar is slidably connected outside the pickling tank, the operating bar is meshedly connected to the limit gear, and the operating bar drives the limit plate to unblock the through hole.

[0016] By adopting the above technical solution, the staff slides the operating bar to drive the limit gear to rotate. Since the limit gear is meshed and connected to the limit plate, the limit gear can drive the limit plate to move, so that the limit plate does not block the through hole, allowing the cleaning liquid to enter or leave the containing tank through the through hole, so that the staff can replace the cleaning liquid in the containing tank.

[0017] Optionally, a fixing cover is provided on the pickling tank, a fixing bar is slidably connected to the pickling tank, a fixing hole for inserting the fixing bar is opened on the fixing cover, and when the fixing bar is located in the fixing hole, the fixing cover blocks the through hole.

[0018] By adopting the above technical solution, the staff slides the fixed cover to allow the fixed cover to block the through hole, and then slides the fixed bar to allow the fixed bar to be inserted into the fixed hole, so that the fixed bar limits the fixed cover, thereby preventing the fixed cover from directly detaching from the pickling tank, reducing the possibility of the fixed cover detaching from the pickling tank, and allowing the fixed cover to stably block the through hole.

[0019] Optionally, a fixing spring is provided on the fixing bar, and the fixing spring drives the fixing bar to be inserted into the fixing hole. An operating block is slidably connected in the fixing hole, and a fixing groove for inserting the fixing bar is opened on the limiting plate; when the fixing bar is located in the fixing hole, the fixing bar is inserted into the fixing groove, and at this time the limiting plate blocks the through hole.

[0020] By adopting the above technical solution, the fixing strip is driven by the fixing spring to be inserted into the fixing hole. At this time, the limit plate blocks the through hole, so that the fixing groove is aligned with the fixing hole. Since the operating block is located in the fixing hole, the fixing strip is restricted by the operating block, so that the fixing strip can be inserted into the fixing groove, so that the fixing strip and the limiting plate are fixed to each other, so that the limiting plate is not easy to move. When the fixing cover blocks the through hole, the fixing cover limits the limiting plate through the fixing strip, so that the limiting plate is not easy to move and the through hole is not blocked, thereby further increasing the stability of the limiting plate blocking the through hole.

[0021] Optionally, a card slot is provided on the pickling cover, and a card strip is slidably connected to the pickling tank. When the pickling cover blocks the receiving tank, the card strip is located in the card slot.

[0022] By adopting the above technical solution, the staff slides the card strip so that the card strip can be inserted into the card slot, and the card strip limits the pickling cover, so that the pickling cover can stably seal the receiving slot.

[0023] Optionally, a linkage bar is slidably arranged on the pickling tank, and when the limit plate blocks the through hole, the operating bar is located on the sliding path of the linkage bar, and a linkage slope is provided on the linkage bar, and the distance between the linkage slope and the pickling cover gradually decreases along the direction from the pickling tank to the operating bar; when the linkage bar abuts against the card strip and the operating bar, the limit plate blocks the through hole, and the card strip is located in the card groove.

[0024] By adopting the above technical solution, the operating bar is located on the sliding path of the linkage bar. The staff needs to slide the operating bar first to allow the limit plate to not block the perforation, so that the cleaning liquid in the pickling tank can be discharged. At this time, the linkage bar can be taken out of the pickling tank, so that the linkage bar does not restrict the card bar, so that the card bar can be separated from the card slot, so that the pickling cover is released from the restriction; when the linkage bar is inserted into the pickling tank, the linkage inclined surface pushes the card bar to move, so that the card bar can be smoothly inserted into the card slot, so that the pickling cover can be fixed on the pickling tank.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. The copper belt is abutted against the polishing brush, and the polishing drive drives the polishing brush to rotate, so that the polishing brush polishes the copper belt, so that the copper oxide on the copper belt can be completely removed, reducing the problem of cleaning the copper belt again, and greatly reducing the problem of incomplete cleaning of the copper belt.

[0027] 2. Pull the elastic strip and insert the stop strip into the stop hole so that the pickling cover can be fixed on the pickling tank, reducing the possibility of the pickling cover moving on the pickling tank, so that the pickling cover can seal the receiving tank more stably and reduce the possibility of the cleaning liquid escaping from the receiving tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram of the structure of Example 1;

[0029] Figure 2 is a schematic structural diagram highlighting the polishing module in Example 1;

[0030] Figure 3 is a structural schematic diagram highlighting the pickling module in Example 2;

[0031] Figure 4 is along Figure 3 Sectional view along line AA;

[0032] Figure 5 is along Figure 3 Sectional view along the midline BB;

[0033] Figure 6 yes Figure 5 A magnified schematic diagram of part C;

[0034] Figure 7 yes Figure 5 Enlarged schematic diagram of part D in the figure.

[0035] Figure numerals: 1, moving module; 11, moving driving member; 12, first winding roller; 13, second winding roller; 2, pickling module; 21, pickling tank; 211, receiving groove; 212, pickling roller; 213, perforation; 214, dovetail groove; 215, stopper strip; 22, pickling cover; 221, dovetail block; 222, elastic strip; 223, stopper hole; 224, slot; 23, through hole; 24, clip hole; 241, clip strip; 25, linkage hole; 251, linkage strip; 252, linkage inclined plane; 26, receiving hole; 261, fixing strip ; 262, accommodating groove; 263, fixing block; 264, fixing spring; 3, polishing module; 31, polishing shell; 32, polishing brush; 33, polishing drive; 34, polishing roller; 4, cleaning module; 41, cleaning shell; 42, flushing pipe; 5, air blowing module; 51, air blowing part; 52, air blowing pipe; 6, drying module; 61, drying shell; 62, drying pipe; 7, limit plate; 71, rotating hole; 711, limit gear; 72, operating strip; 73, fixing groove; 8, fixing cover; 81, fixing hole; 82, operating block. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-7 This application is described in further detail.

[0037] Example 1

[0038] This embodiment discloses a copper strip cleaning device. Figure 1 A copper strip cleaning device comprises a moving module 1, a pickling module 2, a polishing module 3, a cleaning module 4, an air blowing module 5, and a drying module 6. The moving module 1 is used to move the copper strip in other modules and to roll up the copper strip after cleaning. The pickling module 2 is used to pickle the copper strip. The polishing module 3 is used to polish the copper strip. The cleaning module 4 is used to clean the copper strip. The air blowing module 5 is used to blow moisture on the copper strip. The drying module 6 is used to dry the copper strip.

[0039] Reference Figure 1 The mobile module 1 includes two mobile driving members 11, a first winding roller 12 and a second winding roller 13. The mobile driving member 11 includes a mobile motor, which can drive the first winding roller 12 or the second winding roller 13 to rotate. The first winding roller 12 and the second winding roller 13 realize the loading or unloading of the copper strip, and the other modules are located between the first winding roller 12 and the second winding roller 13.

[0040] Reference Figure 1The pickling module 2 includes a pickling tank 21, which is provided with a receiving tank 211. The receiving tank 21 contains a cleaning liquid, and the cleaning liquid can pickle the copper strip. A plurality of pickling rollers 212 are rotatably connected in the pickling tank 21, and the copper strip is located on the pickling rollers 212, so that the copper strip can be immersed in the cleaning liquid for pickling.

[0041] Reference Figure 1 and Figure 2 The polishing module 3 includes a polishing housing 31, two polishing brushes 32 and a polishing driving member 33, wherein the polishing driving member 33 is disposed on the polishing housing 31, and the polishing brush 32 is fixedly connected to the polishing driving member 33. The polishing driving member 33 can drive the polishing brush 32 to rotate, wherein the polishing brush 32 can perform a polishing process on the copper strip.

[0042] Reference Figure 2 Two polishing rollers 34 are rotatably connected in the polishing housing 31, and the copper belt is located between the polishing roller 34 and the polishing brush 32, so that the copper belt can stably abut the polishing brush 32. One of the polishing brushes 32 is located on one side of the copper belt, and the other polishing brush 32 is located on the other side of the copper belt.

[0043] Reference Figure 2 The cleaning module 4 includes a cleaning shell 41 and a plurality of flushing pipes 42. The flushing pipes 42 are located in the cleaning shell 41. The copper strip is located above the flushing pipes 42. The flushing pipes 42 spray water to flush and clean the copper strip.

[0044] Reference Figure 2 The air blowing module 5 includes two air blowing members 51 and an air blowing pipeline 52, and the air blowing members 51 are connected to the air blowing pipeline 52. The copper strip is located between the two air blowing members 51, and the air blowing members 51 can blow air to the copper strip to reduce the residual moisture on the copper strip.

[0045] Reference Figure 2 The drying module 6 includes a drying shell 61 and two drying pipes 62. The two drying pipes 62 are both arranged on the drying shell 61. One drying pipe 62 is used to release gas, and the other drying pipe 62 is used to absorb gas. When the copper strip passes through the drying module 6, the copper strip is dried by gas to prevent the residual moisture on the copper strip from corroding the copper strip.

[0046] The implementation principle of Example 1 is as follows: the copper strip is cleaned by the pickling module 2, the polishing module 3, the cleaning module 4, the air blowing module 5 and the drying module 6.

[0047] Example 2

[0048] Reference Figure 3 and Figure 4The difference between this embodiment and embodiment 1 is that the pickling module 2 further includes a pickling cover 22. The pickling rollers 212 are all located in the receiving tank 211, and the pickling cover 22 is used to block the opening of the receiving tank 211. The pickling tank 21 is provided with a through hole 213 for the copper strip to pass through.

[0049] Reference Figure 4 A dovetail block 221 is fixedly connected to the surface of the pickling cover 22, and the dovetail block 221 extends along the width direction of the pickling cover 22. A dovetail groove 214 for inserting the dovetail block 221 is provided on the surface of the pickling tank 21. When the dovetail block 221 is inserted into the dovetail groove 214, the pickling cover 22 is fixed to the pickling tank 21.

[0050] Reference Figure 4 Two elastic strips 222 are fixedly connected to the surface of the pickling cover 22, and stop holes 223 are provided on the surfaces of the two elastic strips 222. Two stop strips 215 are fixedly connected to the surface of the pickling tank 21, and the stop strips 215 can be inserted into the stop holes 223. When the stop strips 215 are inserted into the stop holes 223, the elastic strips 222 and the stop strips 215 are fixed to each other, so that the pickling cover 22 blocks the receiving groove 211.

[0051] Reference Figure 5 The pickling tank 21 is provided with a through hole 23 connected to the containing groove 211, and the through hole 23 is for the cleaning liquid to pass through.

[0052] Reference Figure 5 and Figure 6 A limiting plate 7 is slidably connected to the side of the receiving groove 211, and a rotating hole 71 is opened on the groove wall of the receiving groove 211. A limiting gear 711 is rotatably connected in the rotating hole 71, wherein the position of the rotating hole 71 is higher than the position of the cleaning liquid in the receiving groove 211, that is, the cleaning liquid will not pass through the rotating hole 71.

[0053] Reference Figure 6 An operating bar 72 is slidably connected to the pickling tank 21, and the operating bar 72 is located outside the pickling tank 21. The operating bar 72 and the limit gear 711 are meshed with each other, and the operating bar 72 and the limit plate 7 are respectively located on both sides of the limit gear 711, that is, the operating bar 72 is located outside the pickling tank 21, and the limit plate 7 is located inside the pickling tank 21.

[0054] Reference Figure 5 and Figure 6 When the staff slides the operating bar 72, the operating bar 72 drives the limiting plate 7 to slide through the limiting gear 711, so that the limiting plate 7 does not block the through hole 23, so as to facilitate the replacement of the cleaning liquid.

[0055] Reference Figure 4 and Figure 6The pickling tank 21 is provided with a clamping hole 24, which extends in the height direction of the pickling tank 21. A clamping strip 241 is slidably connected in the clamping hole 24, and a clamping groove 224 is provided on the surface of the dovetail block 221 of the pickling cover 22, and the clamping groove 224 is for inserting the clamping strip 241. When the clamping strip 241 is inserted into the clamping groove 224, the pickling cover 22 is fixed on the pickling tank 21, and the pickling cover 22 blocks the receiving groove 211.

[0056] Reference Figure 5 and Figure 6 , a linkage hole 25 connected to the clamping hole 24 is provided on the pickling tank 21, and the linkage hole 25 extends along the width direction of the pickling tank 21. A linkage bar 251 is slidably arranged in the linkage hole 25, and one end of the linkage bar 251 can be inserted into the clamping slot 224. A linkage inclined surface 252 is provided on the end surface of the linkage bar 251 facing the clamping slot 224, and the distance between the linkage inclined surface 252 and the pickling cover 22 gradually increases along the direction from the operating bar 72 to the pickling tank 21. When the limiting plate 7 blocks the through hole 23, the operating bar 72 is located on the path of the linkage bar 251 to pull out the linkage hole 25, and at this time, the operating bar 72 restricts the linkage bar 251 from being separated from the linkage hole 25. When the limiting plate 7 does not block the through hole 23, the linkage bar 251 can be separated from the linkage hole 25.

[0057] Reference Figure 6 and Figure 7 The staff first drives the operating strip 72 to slide, allowing the operating strip 72 to rotate through the limit gear 711. The limit plate 7 does not block the through hole 23, so that the cleaning liquid is discharged. At this time, the operating strip 72 does not block the linkage hole 25, so that the linkage strip 251 can be taken out from the linkage hole 25. The clamping strip 241 lacks the limit of the linkage strip 251, so that the clamping strip 241 is separated from the clamping slot 224, thereby realizing the unlocking of the pickling cover 22 by the clamping strip 241.

[0058] Reference Figure 7 , a fixed cover 8 is slidably connected to the pickling tank 21, and the fixed cover 8 can block the opening of the through hole 23. A receiving hole 26 connected to the receiving groove 211 is provided on the pickling tank 21, and a fixing bar 261 is slidably connected in the receiving hole 26. Two receiving grooves 262 are provided on the hole wall of the receiving hole 26, and two fixing blocks 263 are fixedly connected on the surface of the fixing bar 261, and a fixing spring 264 is fixedly connected on the surface of the fixing block 263. The fixing block 263 and the fixing spring 264 are both located in the receiving groove 262, and one end of the fixing spring 264 away from the fixing block 263 is located in the receiving groove 262. When the fixing bar 261 protrudes from the receiving hole 26 in a direction away from the receiving groove 211, the fixing spring 264 is in a compressed state, that is, the fixing spring 264 drives the fixing bar 261 to protrude from the receiving hole 26 in a direction away from the receiving groove 211.

[0059] Reference Figure 7A fixing hole 81 is provided on the surface of the fixing cover 8 for inserting the fixing strip 261, and an operating block 82 is slidably connected in the fixing hole 81. A fixing groove 73 is provided on the surface of the limiting plate 7 facing the receiving hole 26 for inserting the fixing strip 261. When the staff presses the operating block 82 to make the operating block 82 completely located in the fixing hole 81, the operating block 82 drives the fixing strip 261 to move toward the receiving groove 211, and one end of the fixing strip 261 is located in the fixing groove 73, so that the fixing strip 261 releases the restriction on the fixing cover 8.

[0060] Reference Figure 7 When the fixed cover 8 blocks the through hole 23, the fixed hole 81 is aligned with the receiving hole 26, one end of the fixed strip 261 is inserted into the fixed hole 81, the operating block 82 abuts against the fixed strip 261, and the other end of the fixed strip 261 is inserted into the fixed groove 73. At this time, the limit plate 7 blocks the through hole 23, and the fixed cover 8 limits the limit plate 7. When the fixed cover 8 does not block the through hole 23, the fixed spring 264 drives the fixed strip 261 to move, so that the fixed strip 261 is separated from the fixed groove 73, and the limit plate 7 slides in the receiving groove 211.

[0061] The implementation principle of Example 2 is as follows: the staff first presses the operating block 82, slides the fixed cover 8, and releases the blocking of the through hole 23 by the fixed cover 8. At this time, the fixed spring 264 drives the fixed bar 261 to move, allowing the fixed bar 261 to release the restriction on the limit plate 7, and the staff connects the corresponding pipe and the through hole 23; then the staff slides the operating bar 72, allowing the operating bar 72 to drive the limit plate 7 to slide through the limit gear 711, so that the limit plate 7 does not block the through hole 23, so as to facilitate the replacement of the cleaning fluid.

[0062] Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second", "third" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and similar words do not indicate a quantitative limit, but indicate that there is at least one. "Include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0063] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the design concept of the present application should be included in the protection scope of the present application.

Claims

1. A copper strip cleaning device, comprising a moving module (1) and a pickling module (2), characterized in that: It also comprises a polishing module (3), the polishing module (3) comprising a polishing housing (31), two polishing brushes (32) and a polishing drive member (33), the polishing brush (32) being rotatably connected to the polishing housing (31), the polishing drive member (33) being used to drive the polishing brush (32) to rotate, and the polishing brush (32) abutting against the copper belt; The pickling module (2) comprises a pickling tank (21) and a pickling cover (22); the pickling tank (21) is provided with a receiving groove (211), the receiving groove (211) is used for cleaning the copper strip, the pickling cover (22) is used for blocking the opening of the receiving groove (211), and the pickling tank (21) is provided with a through hole (213) for the copper strip to pass through; The pickling tank (21) is provided with a through hole (23) for the cleaning liquid to pass through, a limit plate (7) for blocking the through hole (23) is slidably connected in the containing groove (211), a limit gear (711) is meshedly connected on the limit plate (7), an operating bar (72) is slidably connected outside the pickling tank (21), the operating bar (72) is meshedly connected to the limit gear (711), and the operating bar (72) drives the limit plate (7) to not block the through hole (23); The pickling tank (21) is provided with a fixing cover (8), a fixing strip (261) is slidably connected to the pickling tank (21), a fixing hole (81) is provided on the fixing cover (8) for inserting the fixing strip (261), and when the fixing strip (261) is located in the fixing hole (81), the fixing cover (8) blocks the through hole (23); The fixing strip (261) is provided with a fixing spring (264), and the fixing spring (264) drives the fixing strip (261) to be inserted into the fixing hole (81), and an operating block (82) is slidably connected in the fixing hole (81), and a fixing groove (73) for inserting the fixing strip (261) is provided on the limiting plate (7); when the fixing strip (261) is located in the fixing hole (81), the fixing strip (261) is inserted into the fixing groove (73), and at this time, the limiting plate (7) blocks the through hole (23).

2. A copper strip cleaning device according to claim 1, characterized in that: The invention also comprises a cleaning module (4) and a drying module (6), wherein the cleaning module (4) comprises a flushing pipe (42), wherein the flushing pipe (42) is used for flushing the copper strip, and the drying module (6) comprises a drying shell (61) and a drying pipe (62), wherein the drying pipe (62) is arranged in the drying shell (61), and wherein the drying pipe (62) is used for drying the copper strip.

3. A copper strip cleaning device according to claim 1, characterized in that: The pickling tank (21) is provided with a stop strip (215), the pickling cover (22) is provided with an elastic strip (222), the elastic strip (222) is provided with a stop hole (223) for the stop strip (215) to be inserted, and when the stop strip (215) is located in the stop hole (223), the pickling cover (22) blocks the containing groove (211).

4. A copper strip cleaning device according to claim 1, characterized in that: The pickling cover (22) is provided with a clamping groove (224), and the pickling tank (21) is slidably connected with a clamping strip (241); when the pickling cover (22) blocks the receiving groove (211), the clamping strip (241) is located in the clamping groove (224).

5. A copper strip cleaning device according to claim 4, characterized in that: A linkage bar (251) is slidably arranged on the pickling tank (21); when the limit plate (7) blocks the through hole (23), the operating bar (72) is located on the sliding path of the linkage bar (251); a linkage inclined surface (252) is provided on the linkage bar (251); and the distance between the linkage inclined surface (252) and the pickling cover (22) gradually decreases along the direction from the pickling tank (21) to the operating bar (72); when the linkage bar (251) abuts against the clamping bar (241) and the operating bar (72), the limit plate (7) blocks the through hole (23), and the clamping bar (241) is located in the clamping groove (224).

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