Precise and silent peeling device for electrolytic zinc and electrolytic copper

Abstract

The application discloses a silent precise pre-stripping device for electrolytic zinc and electrolytic copper and relates to the technical field of metallurgy. The device comprises a rack, a pre-stripping device and an electrode plate. The pre-stripping device is arranged on the rack and comprises a guide plate, an inner swing arm, a cutter head and a driving device. A guide groove is arranged on the sidewall of the guide plate. A connecting shaft is arranged on the inner swing arm and is matched with the guide groove. The inner swing arm is arranged on the guide plate through the matching of the connecting shaft and the guide groove. The cutter head is arranged on the lower end of the inner swing arm and faces the electrode plate. The driving device is connected with the inner swing arm and can drive the inner swing arm to move along the guide groove. The cutter head can move along with the inner swing arm and tightly contact the surface of the electrode plate to strip the edges of the zinc sheet or the copper sheet on the surface of the electrode plate. The device has the beneficial effect that the edges of the zinc sheet or the copper sheet on the surface of the electrode plate can be stripped, and the edges of the zinc sheet or the copper sheet are convenient for the subsequent mechanical hand to grasp.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metallurgy, in particular to a silent and precise pre-stripping device for electrolytic zinc and electrolytic copper. BACKGROUND

[0002] In the field of electrolytic zinc and electrolytic copper in non-ferrous metallurgy, cathode plates and anode plates are placed opposite to each other in an electrolyte tank, and zinc and copper in the electrolyte are gradually deposited on the plates to form a layer of zinc or copper sheets on the surface of the plates.

[0003] In the prior art, in order to strip the zinc sheets deposited on the surface of the plates, the plates are lifted from the electrolyte by a lifting device, and a mechanical gear is inserted into the plates and the zinc sheets, which is a rough process with loud noise and causes great damage to the plates and the zinc sheets.

[0004] In the prior art, in order to strip the copper sheets, a large mechanical device is used to repeatedly push and scratch the plates and the copper sheets, which is a rough process with loud noise, causing great damage to the plates, damaging the insulating strips of the plates, and causing secondary damage to the reuse of the plates and seriously affecting the service life of the plates. SUMMARY

[0005] The present application provides a silent and precise pre-stripping device for electrolytic zinc and electrolytic copper.

[0006] The technical solution of the present application is as follows:

[0007] The silent and precise pre-stripping device for electrolytic zinc and electrolytic copper comprises:

[0008] a rack arranged above a plate on the surface of which zinc sheets or copper sheets are deposited;

[0009] a pre-stripping device arranged on the rack, the pre-stripping device comprising a guide plate, an inner swing arm, a tool bit, and a driving device, a guide groove penetrating through the side wall of the guide plate, a connecting shaft arranged on the inner swing arm and matched with the guide groove, the inner swing arm being slidably arranged on the guide plate through the cooperation of the connecting shaft and the guide groove, the tool bit being obliquely arranged at the lower end of the inner swing arm and facing the plate, and the driving device being connected with the inner swing arm to drive the inner swing arm to move along the guide groove, the tool bit being able to move with the inner swing arm and tightly adhere to the surface of the plate to strip the edges of the zinc sheets or copper sheets on the surface of the plate.

[0010] Preferably, the plate is arranged in the height direction, the guide groove is arranged in the height direction, and the guide groove is arranged to be first inwardly inclined and then outwardly inclined from top to bottom, so that the tool bit first tightly adheres to the surface of the plate and then moves away from the plate during the downward movement of the inner swing arm.

[0011] Preferably, the included angle between the tool head and the polar plate is 30-40°, the inwardly inclined angle of the guide groove is 0.5-5°, and the outwardly inclined angle is 35-45°.

[0012] Preferably, the guide groove comprises, from top to bottom, a first vertical groove, a second inwardly inclined groove, a third vertical groove and a fourth outwardly inclined groove connected to each other, the first and third vertical grooves are arranged along the vertical direction, the second inwardly inclined groove is arranged inwardly inclined, with an inclined angle of 0.5-5°, and the fourth outwardly inclined groove is arranged outwardly inclined, with an inclined angle of 35-45°.

[0013] Preferably, the included angle between the tool head and the polar plate is 35°, the height ratio of the first vertical groove, the second inwardly inclined groove, the third vertical groove and the fourth outwardly inclined groove along the vertical direction is 28:24:5:4, the inclined angle of the second inwardly inclined groove is 1.5-3.5°, and the inclined angle of the fourth outwardly inclined groove is 40°.

[0014] Preferably, the lower end of the inner swing arm is provided with a mounting groove for mounting the tool head, and the tool head is clamped in the mounting groove.

[0015] Preferably, the lower end of the inner swing arm is provided with a mounting block body and a rear stop block, a left stop block and a right stop block arranged on the mounting block body, the mounting block body is arranged inclined, the rear stop block is arranged on the upper end of the mounting block body along the vertical direction, the left and right stop blocks are arranged on both sides of the mounting block body, and the mounting groove is formed between the mounting block body, the rear stop block, the left stop block and the right stop block.

[0016] Preferably, the mounting block body has a mounting hole, the tool head is provided with a corresponding clamping hole, and a fixing member adapted to the mounting hole and the clamping hole is further included, the fixing member is mounted in the mounting hole and the clamping hole to fix the tool head in the mounting groove.

[0017] Preferably, the number of the inner swing arms is two, the two inner swing arms are oppositely arranged on the guide plate, and the lower ends of the inner swing arms are respectively located on both sides of the polar plate.

[0018] Preferably, the upper end of the inner swing arm is provided with a shaft hole and a mounting shaft adapted to the shaft hole, the inner wall of the guide plate is provided with a sliding rail and a sliding block matched with the sliding rail, the mounting shaft is mounted in the shaft hole, and the two ends of the mounting shaft are connected with the sliding blocks, and the driving device is connected with the mounting shaft to drive the mounting shaft to move along the sliding rail.

[0019] Preferably, a spring device is further arranged on the rack, the spring device comprising a spring, a roller and a lever, the roller being fixedly connected to the lever, one end of the lever being rotatably fixed to the lower part of the rack, and the other end of the lever being provided with the spring, the spring being compressed or stretched to make the lever close to the inside of the rack, thereby driving the roller to press the inner swing arm, so that the cutting head keeps clamping during downward movement, and it is more beneficial to insert the zinc sheet or copper sheet between the cutting head and the polar plate.

[0020] During the movement of the inner swing arm, the roller rolls without affecting the normal movement of the inner swing arm, the spring provides a space for the expansion and contraction of the roller, the roller presses the inner swing arm inward, and the cutting head keeps clamping, which is more beneficial to insert the zinc sheet or copper sheet between the cutting head and the polar plate.

[0021] The present application has one of the following beneficial effects:

[0022] 1. The electrolytic zinc and electrolytic copper silent precise peeling device of the present application installs the cutting head at the lower end of the inner swing arm, the cutting head is arranged towards the polar plate and at an angle with the polar plate, the inner swing arm is driven by the driving device to move downward along the guide groove, thereby driving the cutting head to move downward to peel off the edges of the zinc sheet or copper sheet on the surface of the polar plate. Moreover, the guide groove is arranged from top to bottom first inwardly inclined and then outwardly inclined, so that during the downward movement of the cutting head with the inner swing arm, the cutting head can first move inward to closely contact the surface of the polar plate, and then move outward away from the polar plate, thereby peeling off the edges of the zinc sheet or copper sheet on the surface of the polar plate, which is convenient for the subsequent mechanical hand to grasp the edges of the zinc sheet or copper sheet.

[0023] 2. The present application is provided with group peeling devices, which can simultaneously peel off the zinc sheet or copper sheet at the two through holes on the polar plate. Each group of peeling devices is provided with two inner swing arms, the two inner swing arms are oppositely arranged on the guide plate, and the lower ends of the inner swing arms are respectively located on the two sides of the polar plate, thereby simultaneously peeling off the edges of the zinc sheet or copper sheet on the front and rear surfaces of the polar plate, improving the efficiency.

[0024] 3. The present application is provided with a spring device, the spring is compressed or stretched to make the lever close to the inside of the rack, thereby driving the roller to press the inner swing arm, so that the cutting head keeps clamping during downward movement, and it is more beneficial to insert the zinc sheet or copper sheet between the cutting head and the polar plate.

[0025] 4. The present application creatively improves the copper sheet peeling method, which can avoid using large mechanical devices to repeatedly push and scratch the polar plate and copper sheet, avoid causing great harm to the polar plate and insulating edge strip, and prolong the service life of the polar plate. By using the technology of the present application, the peeling process is nearly silent, no noise is generated, and the working environment is friendly. BRIEF DESCRIPTION OF DRAWINGS

[0026] Fig. 1It is the three-dimensional structure schematic diagram of the electrolytic zinc, electrolytic copper silent precision pre-stripping device of the present application.

[0027] Fig. 2 It is the front view structure schematic diagram of the electrolytic zinc, electrolytic copper silent precision pre-stripping device of the present application.

[0028] Fig. 3 It is the side view structure schematic diagram of the electrolytic zinc, electrolytic copper silent precision pre-stripping device of the present application.

[0029] Fig. 4 It is the three-dimensional structure schematic diagram of the pre-stripping device of the present application.

[0030] Fig. 5 It is the front view structure schematic diagram of the pre-stripping device of the present application.

[0031] Fig. 6 It is the sectional view structure schematic diagram of the pre-stripping device of the present application.

[0032] Fig. 7 It is the structure schematic diagram of the inner swing arm of the present application.

[0033] Indicated in the figure:

[0034] 10, rack;

[0035] 20, pre-stripping device;

[0036] 21, guide plate; 211, guide groove;

[0037] 22, inner swing arm; 221, connecting shaft; 222, mounting block body; 223, rear stop block; 224, left stop block; 225, right stop block; 226, mounting hole; 227, shaft hole;

[0038] 23, cutter head;

[0039] 24, driving device;

[0040] 25, mounting shaft;

[0041] 26, sliding block;

[0042] 27, positioning plate;

[0043] 30, polar plate; 301, through hole. DETAILED DESCRIPTION

[0044] The present application will be further described in detail with specific embodiments, but the present application is not limited to the following specific embodiments.

[0045] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" and the like can be explicitly or implicitly included one or more. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0046] In the description of the present application, it needs to be understood that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood through specific circumstances.

[0047] As shown in Figs. 1-7 , the present embodiment provides a silent and precise pre-stripping device for electrolytic zinc and electrolytic copper, which comprises the following structures:

[0048] The rack 10 is placed above the electrode plate 30 on which zinc or copper sheets are deposited.

[0049] As shown in Figs. 1-2 , in the present embodiment, the electrode plate 30 is arranged in the height direction. Specifically, during electrolysis, the upper end of the electrode plate 30 is clamped by a clamping device, the clamping device has two hanging ears, and the electrode plate 30 is placed into the electrolyte by a lifting device such as a pneumatic cylinder or an oil cylinder which grabs the hanging ears. Similarly, after electrolysis is completed, the electrode plate 30 is lifted by the lifting device, so that the electrode plate 30 is arranged in the height direction. The clamping device and the lifting device are prior art, and their principles and structures are well known to those skilled in the art, which will not be described in detail in the present embodiment. As shown in Figs. 1-2 , the upper end of the electrode plate 30 also has a through hole 301, and the number of the through hole 301 is two.

[0050] The pre-stripping device 20 is arranged in the height direction on the rack 10, as shown in Figs. 1-3As shown, the pre-stripping device 20 is arranged below the frame 10. Specifically, the pre-stripping device 20 comprises a guide plate 21, an inner swing arm 22, a cutter head 23 and a driving device 24 arranged along the height direction.

[0051] The guide plate 21 is arranged between the two guide plates 21, and the upper end of the guide plate 21 is arranged on the frame 10. The two guide plates 21 are connected and fixed by a positioning plate 27 arranged along the horizontal direction. The upper end of the inner swing arm 22 is arranged between the two guide plates 21. Specifically, the opposite side walls of the guide plate 21 are provided with a guide groove 211 penetrating through. The guide groove 211 is arranged along the height direction, and the guide groove 211 is arranged from top to bottom first inwardly inclined and then outwardly inclined. Preferably, the inwardly inclined angle of the guide groove 211 is 0.5-5°, and the outwardly inclined angle is 35-45°. More specifically, the guide groove 211 comprises a first vertical groove, a second inwardly inclined groove, a third vertical groove and a fourth outwardly inclined groove connected with each other from top to bottom. The first vertical groove and the third vertical groove are arranged along the vertical direction. The second inwardly inclined groove is arranged along the height direction from top to bottom and inwardly inclined at an angle of 0.5-5°. The fourth outwardly inclined groove is arranged along the height direction from top to bottom and outwardly inclined at an angle of 35-45°. More specifically, the height ratio of the first vertical groove, the second inwardly inclined groove, the third vertical groove and the fourth outwardly inclined groove is 28:24:5:4. The inclined angle of the second inwardly inclined groove is 1.5-3.5°, and the inclined angle of the fourth outwardly inclined groove is 40°.

[0052] The upper end of the inner swing arm 22 is provided with a shaft hole 227 and a mounting shaft 25 matched with the shaft hole 227. The inner wall of the guide plate 21 is provided with a sliding rail and a sliding block 26 matched with the sliding rail. The mounting shaft 25 is arranged in the shaft hole 227, and the two ends of the mounting shaft 25 are connected with the sliding block 26. The inner swing arm 22 is further provided with a connecting shaft 221 matched with the guide groove 211. The inner swing arm 22 is arranged on the guide plate 21 by the cooperation of the connecting shaft 221 and the guide groove 211. The driving device 24 is arranged along the height direction. The driving device 24 is connected with the mounting shaft 25 to drive the mounting shaft 25 to move along the sliding rail and drive the lower end of the inner swing arm 22 to move along the guide groove 211. In this embodiment, the driving device 24 is an oil cylinder. The mounting shaft 25 is provided with a shaft sleeve 28. The shaft sleeve 28 is connected with the driving device 24 through other components. The connection structure of the shaft sleeve 28 and the driving device 24 is a prior art.

[0053] As shown in FIG. 1, the pre-stripping device 20 is arranged below the frame 10. Fig. 7As shown, the lower end of the inner swing arm 22 is provided with a mounting groove for mounting the cutter head 23, and the cutter head 23 is clamped in the mounting groove. Specifically, the lower end of the inner swing arm 22 is provided with a mounting block body 222 and a rear stop block 223, a left stop block 224 and a right stop block 225 arranged on the mounting block body 222. The mounting block body 222, the rear stop block 223, the left stop block 224 and the right stop block 225 are integrally formed, and the mounting block body 222 is arranged obliquely. Specifically, the angle between the mounting block body 222 and the polar plate 30 is 30-40°, and more specifically 35°. The rear stop block 223 is arranged on the upper end of the mounting block body 222 in the vertical direction, and the rear stop block 223 and the mounting block body 222 form a clamping groove to clamp the rear end of the cutter head 23. The left stop block 224 and the right stop block 225 are arranged on the two sides of the mounting block body 222, respectively, and the left stop block 224 and the right stop block 225 and the mounting block body 222 form a clamping groove to clamp the left end and the right end of the cutter head 23. The mounting block body 222, the rear stop block 223, the left stop block 224 and the right stop block 225 form the mounting groove, so that the cutter head 23 can be clamped between the mounting block body 222, the rear stop block 223, the left stop block 224 and the right stop block 225. The mounting block body 222 has a mounting hole 226, the cutter head 23 is provided with a corresponding mounting hole, and a fixing member matched with the mounting hole is arranged in the mounting hole to fix the cutter head 23 in the mounting groove.

[0054] The cutter head 23 is arranged in the mounting groove and faces the polar plate 30. The angle between the cutter head 23 and the polar plate 30 is 30-40°, and more specifically 35°. The cutter head 23 can move with the inner swing arm 22 and tightly adhere to the surface of the polar plate 30 to strip the edges of the zinc sheet or the copper sheet on the surface of the polar plate 30. Specifically, the cutter head 23 first tightly adheres to the surface of the polar plate 30 inwardly and then moves outwardly away from the polar plate 30 during the downward movement of the inner swing arm 22 to strip the edges of the zinc sheet or the copper sheet on the surface of the polar plate 30. More specifically, the cutter head 23 is arranged above the through hole 301 on the upper end of the polar plate 30. The cutter head 23 first tightly adheres to the through hole 301 inwardly during the downward movement of the inner swing arm 22 to contact the zinc sheet or the copper sheet at the edge of the through hole 301, and then moves outwardly away from the polar plate 30 to strip the zinc sheet or the copper sheet at the edge of the through hole 301.

[0055] In the embodiment, two groups of pre-stripping devices 20 are arranged on each rack 10, and the two groups of pre-stripping devices 20 are arranged above the through holes 301, so that the zinc sheets or copper sheets at the two through holes 301 on the polar plate 30 can be stripped at the same time. In the embodiment, each group of pre-stripping devices 20 is provided with two inner swing arms 22, and the two inner swing arms 22 are oppositely arranged on the guide plate 21, and the lower ends of the inner swing arms 22 are located on the two sides of the polar plate 30 respectively, so that the edges of the zinc sheets or copper sheets on the front and back surfaces of the polar plate 30 can be stripped at the same time, and the efficiency is improved.

[0056] In the embodiment, the cutter head is arranged at the lower end of the inner swing arm, the cutter head faces the polar plate 30 and is arranged at an angle with the polar plate 30, the inner swing arm is driven by the driving device to move downward along the guide groove, so that the cutter head is driven to move downward to strip the edges of the zinc sheets or copper sheets on the surface of the polar plate 30. Moreover, in the application, the guide groove 211 is arranged to be first inwardly inclined and then outwardly inclined from top to bottom, so that during the downward movement of the inner swing arm 22, the cutter head 23 can first move inward to tightly contact the surface of the polar plate 30, and then move outward to move away from the polar plate 30, so that the edges of the zinc sheets or copper sheets on the surface of the polar plate 30 can be stripped, and the edges of the zinc sheets or copper sheets are convenient for the subsequent mechanical hand to grasp.

[0057] The rack can also be provided with a spring device, the spring device comprising a spring, a roller and a lever, the roller being fixedly connected to the lever, one end of the lever being rotatably fixed to the lower part of the rack, and the other end of the lever being provided with the spring, the spring being compressed or stretched to make the lever close to the inside of the rack, so as to drive the roller to compress the inner swing arm, and the cutter head is kept in a clamped state during the downward movement, which is more conducive to the insertion of the cutter head between the zinc sheet or copper sheet and the polar plate.

[0058] During the movement of the inner swing arm, the roller rolls without affecting the normal movement of the inner swing arm, the spring provides a space for the roller to expand and contract, the roller compresses the inner swing arm inward, and the cutter head is kept clamped, which is more conducive to the insertion between the zinc sheet or copper sheet and the polar plate.

[0059] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A silent and precise pre-stripping device for electrolytic zinc and electrolytic copper, characterized in that, include: A frame (10) is positioned above an electrode plate (30) on which zinc or copper sheets are electroplated. A pre-peeling device (20) is mounted on a frame (10). The pre-peeling device (20) includes a guide plate (21), an inner swing arm (22), a cutter head (23), and a drive device (24). A through guide groove (211) is provided on the side wall of the guide plate (21). A connecting shaft (221) adapted to the guide groove (211) is provided on the inner swing arm (22). The inner swing arm (22) is slidably mounted on the guide plate (21) through the cooperation of the connecting shaft (221) and the guide groove (211). The cutter head (23) is inclinedly mounted at the lower end of the inner swing arm (22) and faces the electrode plate. (30) The drive device (24) is connected to the inner swing arm (22) and can drive the inner swing arm (22) to move along the guide groove (211). The cutter head (23) can peel off the edge of the zinc or copper sheet on the surface of the electrode plate (30) as the inner swing arm (22) moves and sticks to the surface of the electrode plate (30). The electrode plate (30) is set along the height direction, and the guide groove (211) is set along the height direction. The guide groove (211) is set from top to bottom, first tilting inward and then tilting outward, so that the cutter head (23) first sticks to the surface of the electrode plate (30) inward and then moves away from the electrode plate (30) inward as the inner swing arm (22) moves downward.

2. The silent and precise pre-stripping device for electrolytic zinc and electrolytic copper according to claim 1, characterized in that, The included angle between the cutter head (23) and the electrode plate (30) is 30-40°, and the guide groove (211) is inclined inward at an angle of 0.5-5° and outward at an angle of 35-45°.

3. The silent and precise pre-stripping device for electrolytic zinc and electrolytic copper according to claim 2, characterized in that, The guide groove (211) includes, from top to bottom, a first vertical groove, a second inwardly inclined groove, a third vertical groove, and a fourth outwardly inclined groove that are connected to each other. The first vertical groove and the third vertical groove are arranged in the vertical direction. The second inwardly inclined groove is inclined inward with an inclination angle of 0.5 to 5°. The fourth outwardly inclined groove is inclined outward with an inclination angle of 35 to 45°.

4. The silent and precise pre-stripping device for electrolytic zinc and electrolytic copper according to claim 1, characterized in that, The lower end of the inner swing arm (22) is provided with a mounting groove for mounting the cutter head (23), and the cutter head (23) is engaged in the mounting groove.

5. The silent and precise pre-stripping device for electrolytic zinc and electrolytic copper according to claim 4, characterized in that, The included angle between the cutter head (23) and the electrode plate (30) is 35°. The guide groove (211) includes, from top to bottom, a first vertical groove, a second inwardly inclined groove, a third vertical groove, and a fourth outwardly inclined groove that are connected to each other. The first vertical groove and the third vertical groove are arranged in the vertical direction. The second inwardly inclined groove is arranged inwardly. The height ratio of the first vertical groove, the second inwardly inclined groove, the third vertical groove, and the fourth outwardly inclined groove in the vertical direction is 28:24:5:

4. The inclination angle of the second inwardly inclined groove is 1.5 to 3.5°, and the inclination angle of the fourth outwardly inclined groove is 40°.

6. The silent and precise pre-stripping device for electrolytic zinc and electrolytic copper according to claim 4, characterized in that, The lower end of the inner swing arm (22) is provided with a mounting block body (222) and a rear stop (223), a left stop (224) and a right stop (225) provided on the mounting block body (222). The mounting block body (222) is inclined. The rear stop (223) is provided vertically at the upper end of the mounting block body (222). The left stop (224) and the right stop (225) are provided on both sides of the mounting block body (222). The mounting groove is formed between the mounting block body (222), the rear stop (223), the left stop (224) and the right stop (225).

7. The silent and precise pre-stripping device for electrolytic zinc and electrolytic copper according to claim 6, characterized in that, The mounting block body (222) has a mounting hole (226), and the cutting head (23) is provided with a corresponding locking hole (231). It also includes a fixing member adapted to the mounting hole (226) and the locking hole (231). The fixing member is installed in the mounting hole (226) and the locking hole (231) to fix the cutting head (23) in the mounting groove.

8. The silent and precise pre-stripping device for electrolytic zinc and electrolytic copper according to claim 1, characterized in that, The number of inner swing arms (22) is two, and the two inner swing arms (22) are arranged opposite to each other on the guide plate (21), and the lower ends of the inner swing arms (22) are located on both sides of the electrode plate (30).

9. The silent and precise pre-stripping device for electrolytic zinc and electrolytic copper according to claim 8, characterized in that, The upper end of the inner swing arm (22) is provided with a shaft hole (227) and a mounting shaft (25) adapted to the shaft hole (227). The inner wall of the guide plate (21) is provided with a slide rail and a slider (26) that cooperates with the slide rail. The mounting shaft (25) is installed in the shaft hole (227) and both ends of the mounting shaft (25) are connected to the slider (26). The driving device (24) is connected to the mounting shaft (25) and can drive the mounting shaft (25) to move along the slide rail.

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