Silicon material cleaning pool capable of achieving water circulation

By introducing an installation structure into the silicon cleaning tank, the docking and disassembly process of the input pipe is simplified, solving the problem of cumbersome installation in the existing technology and improving efficiency and convenience.

CN224195463UActive Publication Date: 2026-05-05YIBIN YINGFA DEKUN TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
YIBIN YINGFA DEKUN TECH CO LTD
Filing Date
2025-04-29
Publication Date
2026-05-05

AI Technical Summary

Technical Problem

The existing process of connecting and installing the inlet pipe in the silicon material cleaning tank is cumbersome, requiring the use of multiple bolts and wrenches, resulting in low installation efficiency.

Method used

The installation structure includes components such as a fixing ring, a positioning ring, a limiting plate, and a spring. The use of the limiting plate and the spring together simplifies the docking and disassembly process of the input pipe.

Benefits of technology

It improves the efficiency of installing and removing the input tube, enhances the ease of operation, and reduces installation time.

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Abstract

The utility model relates to the field of silicon material cleaning pools, in particular to a silicon material cleaning pool capable of achieving water circulation. Comprising a bottom plate and a mounting structure, an ultrasonic pool, a transition pool, a rinsing pool, a pretreatment pool and a detection transmission device are fixedly connected to the upper surface of the bottom plate, a connecting pipe and a liquid inlet pipe are fixedly connected to the inner wall of the ultrasonic pool in a penetrating mode, the liquid inlet pipe is fixedly connected with the transition pool in a penetrating mode, and the connecting pipe is fixedly connected with the detection transmission device in a penetrating mode; and the inner wall of the transition pool is fixedly connected with a connecting pipe in a penetrating manner. The silicon material cleaning pool capable of achieving water circulation solves the problems that in the prior art, an input pipe is fixed through a plurality of bolts in the butt-joint installation process of the input pipe, and in the fixing process, personnel need to use tools such as a wrench to firmly fix the input pipe, so that the input pipe cannot be firmly fixed; and due to the fact that the fixed installation mode is very tedious, the installation efficiency of personnel is reduced.
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Description

Technical Field

[0001] This utility model relates to the field of silicon material cleaning tanks, and more particularly to a silicon material cleaning tank with water circulation capability. Background Technology

[0002] The silicon material cleaning tank consists of an ultrasonic tank, a transition tank, a rinsing tank, a pretreatment tank, and a detection and transmission device. It is mainly a water-recycling silicon material cleaning tank that can recycle water, and it is quite common in existing technologies.

[0003] Existing technologies, such as the utility model patent with publication number CN207800565U, disclose a silicon material cleaning device for solar cell production. This patent uses a cleaning tank, which includes a spray tank, a washing tank, and a sedimentation tank arranged in a stepped manner from top to bottom. The spray tank, washing tank, and sedimentation tank are separated by partition plates. Two dovetail guide rails are fixed to the front and rear side walls of the cleaning tank, and a sliding fixing plate is slidably and vertically fixed between the two dovetail guide rails. A horizontally distributed support plate is vertically fixed to the top side wall of the spray tank, and a first cylinder is fixed to one end of the support plate. The power output end of the first cylinder is fixed to the side wall of the sliding fixing plate. The first cylinder drives the sliding fixing plate to move along the dovetail guide rails. This utility model uses three cylinders to realize the automated multiple cleaning of the silicon material carrier cylinder after cleaning in the washing tank and then cleaning it again in the spray tank. This not only improves work efficiency but also makes the silicon material cleaner after multiple cleanings.

[0004] The inventors discovered in their daily work that the existing method of installing the input pipe onto the connecting pipe is cumbersome because it involves fixing the input pipe with multiple bolts. Furthermore, the use of wrenches and other tools is required to secure the pipe firmly. This method reduces installation efficiency.

[0005] Therefore, it is necessary to provide a new water-recyclable silicon material cleaning tank to solve the above-mentioned technical problems. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies, such as the use of multiple bolts to fix the input pipe during installation, which requires the use of wrenches and other tools to secure the pipe. This cumbersome installation method leads to decreased installation efficiency. Therefore, this invention proposes a water-circulating silicon material cleaning tank.

[0007] To solve the above-mentioned technical problems, this utility model provides a water-circulating silicon material cleaning tank, including: a base plate and an installation structure. An ultrasonic tank, a transition tank, a rinsing tank, a pretreatment tank, and a detection and transmission device are fixedly connected to the upper surface of the base plate. A connecting pipe and an inlet pipe are fixedly connected through the inner wall of the ultrasonic tank. The inlet pipe is fixedly connected to the transition tank, and the connecting pipe is fixedly connected to the detection and transmission device. A connecting pipe is fixedly connected through the inner wall of the transition tank, and the connecting pipe is fixedly connected to the detection and transmission device. An auxiliary pipe is fixedly connected through the inner wall of the rinsing tank, and the auxiliary pipe is fixedly connected to the detection and transmission device. An installation pipe is fixedly connected through the inner wall of the pretreatment tank, and the installation pipe is fixedly connected to the detection and transmission device. A connecting pipe is fixedly connected through the inner wall of the inlet pipe, and a mounting device is installed at the end of the connecting pipe away from the inlet pipe via the installation structure. The input pipe has an arc-shaped mounting structure on its connecting pipe surface. This mounting structure includes a fixing ring and a positioning ring. The fixing ring is fixedly connected to the connecting pipe, and the positioning ring is fixedly connected to the input pipe. Two positioning rods are fixedly connected to the side of the positioning ring closest to the fixing ring. Two positioning holes are formed on the inner wall of the fixing ring, and these holes are slidably connected to the positioning rods. Two fixing plates are fixedly connected to the side of the fixing ring furthest from the positioning ring. A limiting groove is formed on the inner wall of each fixing plate. A moving block and a connecting plate are slidably connected to the inner wall of the limiting groove. The moving block and the connecting plate are fixedly connected. A spring is provided between the side of the moving block furthest from the connecting plate and the limiting groove. The two ends of the spring are fixedly connected to the moving block and the limiting groove, respectively. A limiting plate is fixedly connected to the side of the connecting plate closest to the fixing ring. An auxiliary groove is formed on the inner wall of the limiting plate, and this auxiliary groove is slidably connected to the fixing ring and the positioning ring.

[0008] The effect achieved by the above components is that when personnel need to connect and install the input pipe onto the connecting pipe, they can move the two limiting plates and the input pipe to make the positioning rod slide into the inner wall of the positioning hole. Then, the spring rebounds and makes both the fixing ring and the positioning ring slide into the inner wall of the auxiliary groove, which facilitates the installation of the input pipe and improves the installation efficiency of the input pipe.

[0009] Preferably, the inner wall of the limiting groove is fixedly connected to two limiting rods, and the limiting rods are slidably connected to the moving block.

[0010] The effect achieved by the above components is that the limiting rod can limit the movement of the moving block and prevent the moving block from becoming misaligned during the sliding process on the inner wall of the limiting groove.

[0011] Preferably, a handle is fixedly connected to each of the two limiting plates on the side away from each other, and the handle is U-shaped.

[0012] The effect achieved by the above components is that the handle makes it easier for personnel to move the limit plate, thereby improving the ease of operation.

[0013] Preferably, an anti-slip sleeve is fixedly connected to the arc surface of the grip, and the cross-section of the anti-slip sleeve is a hollow circle.

[0014] The effect achieved by the above components is that the anti-slip sleeve can increase the friction between the person's hand and the handle, and can prevent the person from slipping when moving the handle.

[0015] Preferably, a sealing gasket is fixedly connected to one end of the connecting pipe near the input pipe, and the sealing gasket abuts against the input pipe.

[0016] The effect achieved by the above components is that the sealing gasket can increase the sealing between the connecting pipe and the inlet pipe, and can prevent liquid from flowing out between the connecting pipe and the inlet pipe.

[0017] Preferably, a guide block is fixedly connected to the end of the positioning rod away from the positioning ring.

[0018] The effect achieved by the above components is that the guide block can guide the positioning rod, making it easy for personnel to slide the positioning rod into the inner wall of the positioning hole.

[0019] Preferably, the arc surface of the connecting pipe is provided with an auxiliary structure, which includes a mounting ring, a movable ring, and four connecting holes. The mounting ring is fixedly connected to the connecting pipe, the movable ring is slidably connected to the connecting pipe, and the four connecting holes are all opened on the fixed ring. A compression spring is provided on the side of the mounting ring and the movable ring that are close to each other. The two ends of the compression spring are fixedly connected to the mounting ring and the movable ring, respectively. An auxiliary rod is slidably connected to the inner wall of the connecting hole. The four auxiliary rods are fixedly connected to the movable ring. A protective pad is fixedly connected to the end of the auxiliary rod away from the movable ring, and the protective pad abuts against the positioning ring.

[0020] The effect achieved by the above components is that when personnel remove the input pipe from the connecting pipe through the installation structure, the positioning ring can be moved away from the fixed ring by the rebound of the compression spring, which facilitates the subsequent disassembly of the input pipe and improves the ease of operation for personnel.

[0021] Compared with related technologies, the water-circulating silicon material cleaning tank provided by this utility model has the following beneficial effects:

[0022] This invention provides a water-circulating silicon material cleaning tank. By setting up an installation structure, when personnel need to connect and install the input pipe to the connecting pipe, the installation structure facilitates the connection and installation of the input pipe, thereby speeding up the connection and installation speed and improving the installation efficiency.

[0023] By setting up an auxiliary structure, when personnel disassemble and repair the input pipe using the installation structure, the auxiliary structure can assist them in disassembling the input pipe, thereby improving the ease of operation for personnel. Attached Figure Description

[0024] Figure 1 A schematic diagram of the structure of a water-circulating silicon material cleaning tank provided by this utility model;

[0025] Figure 2 for Figure 1 The diagram shows the structural design of the installation structure.

[0026] Figure 3 for Figure 2 The diagram shows the structural schematic of the side structure.

[0027] Figure 4 for Figure 3 A schematic diagram of the enlarged structure at point A shown;

[0028] Figure 5 for Figure 1 The diagram shows the structure of the auxiliary structure.

[0029] Figure 6 for Figure 5 The diagram shows the enlarged structure at point B.

[0030] The diagram is labeled as follows: 1. Ultrasonic pool; 2. Transition pool; 3. Installation structure; 301. Fixing ring; 302. Positioning ring; 303. Sealing gasket; 304. Fixing plate; 305. Limiting groove; 306. Moving block; 307. Limiting rod; 308. Spring; 309. Connecting plate; 310. Limiting plate; 311. Auxiliary groove; 312. Handle; 313. Anti-slip sleeve; 314. Positioning hole; 315. Positioning rod; 316. Guide block; 4. Auxiliary structure; 41. Mounting ring; 42. Compression spring; 43. Moving ring; 44. Connecting hole; 45. Auxiliary rod; 46. Protective pad; 5. Rinsing pool; 6. Pretreatment pool; 7. Connecting pipe; 8. Connecting pipe; 9. Detection and transmission device; 10. Auxiliary pipe; 11. Mounting pipe; 12. Base plate; 13. Inlet pipe; 14. Connecting pipe; 15. Input pipe. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0032] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0033] Please see Figure 1 This utility model provides a water-circulating silicon material cleaning tank, comprising: a base plate 12 and an installation structure 3. An ultrasonic tank 1, a transition tank 2, a rinsing tank 5, a pretreatment tank 6, and a detection and transmission device 9 are fixedly connected to the upper surface of the base plate 12. A connecting pipe 7 and an inlet pipe 13 are fixedly and continuously connected to the inner wall of the ultrasonic tank 1. The inlet pipe 13 is fixedly and continuously connected to the transition tank 2. The connecting pipe 7 is fixedly and continuously connected to the detection and transmission device 9. A connecting pipe 8 is fixedly and continuously connected to the inner wall of the transition tank 2. The connecting pipe 8 is connected to the detection and transmission device 9. A fixed through connection is provided: an auxiliary pipe 10 is fixedly and through connected to the inner wall of the rinsing tank 5, and the auxiliary pipe 10 is fixedly and through connected to the detection and transmission device 9; an installation pipe 11 is fixedly and through connected to the inner wall of the pretreatment tank 6, and the installation pipe 11 is fixedly and through connected to the detection and transmission device 9; a connecting pipe 14 is fixedly and through connected to the inner wall of the inlet pipe 13, and an input pipe 15 is installed at the end of the connecting pipe 14 away from the inlet pipe 13 by means of the installation structure 3; the arc surface of the connecting pipe 14 is provided with the installation structure 3, and the arc surface of the connecting pipe 14 is provided with the auxiliary structure 4.

[0034] In the embodiments of this utility model, please refer to Figures 2 to 4The installation structure 3 includes a fixing ring 301 and a positioning ring 302. The fixing ring 301 is fixedly connected to the connecting pipe 14, and the positioning ring 302 is fixedly connected to the input pipe 15. Two positioning rods 315 are fixedly connected to the side of the positioning ring 302 closest to the fixing ring 301. Two positioning holes 314 are formed on the inner wall of the fixing ring 301, and the positioning holes 314 are slidably connected to the positioning rods 315. Two fixing plates 304 are fixedly connected to the side of the fixing ring 301 furthest from the positioning ring 302. Limiting grooves 305 are formed on the inner wall of the fixing plates 304. The inner wall of 305 is slidably connected with a moving block 306 and a connecting plate 309. The moving block 306 and the connecting plate 309 are fixedly connected. A spring 308 is provided between the side of the moving block 306 away from the connecting plate 309 and the limiting groove 305. The two ends of the spring 308 are fixedly connected to the moving block 306 and the limiting groove 305 respectively. A limiting plate 310 is fixedly connected to the side of the connecting plate 309 near the fixing ring 301. An auxiliary groove 311 is provided on the inner wall of the limiting plate 310. The auxiliary groove 311 is slidably connected to the fixing ring 301 and the positioning ring 302. When personnel need to connect and install the input pipe 15 onto the connecting pipe 14, they can move the two limiting plates 310 and the input pipe 15 to allow the positioning rod 315 to slide into the inner wall of the positioning hole 314. Then, the spring 308 rebounds, causing the fixing ring 301 and the positioning ring 302 to slide into the inner wall of the auxiliary groove 311. This facilitates the installation of the input pipe 15 and improves the installation efficiency. Two limiting rods 307 are fixedly connected to the inner wall of the limiting groove 305, and the limiting rods 307 are slidably connected to the moving block 306. The limiting rods 307 can limit the moving block 306 and prevent it from misaligning during sliding on the inner wall of the limiting groove 305. A handle 312 is fixedly connected to the side of the two limiting plates 310 that is far apart from each other. The handle 312 is U-shaped. The handle 312 facilitates the movement of the limiting plate 310, improving operational convenience. An anti-slip sleeve 313, with a hollow circular cross-section, is fixedly connected to the arc surface of the handle 312. The anti-slip sleeve 313 increases friction between the user's hand and the handle 312, preventing slippage during movement. A sealing gasket 303 is fixedly connected to the end of the connecting pipe 14 near the input pipe 15, abutting against the input pipe 15. The sealing gasket 303 increases the seal between the connecting pipe 14 and the input pipe 15, preventing liquid leakage. A guide block 316 is fixedly connected to the end of the positioning rod 315 away from the positioning ring 302. The guide block 316 guides the positioning rod 315, facilitating its sliding into the inner wall of the positioning hole 314.

[0035] In the embodiments of this utility model, please refer to Figure 5 and Figure 6The auxiliary structure 4 includes a mounting ring 41, a movable ring 43, and four connecting holes 44. The mounting ring 41 is fixedly connected to the connecting pipe 14, and the movable ring 43 is slidably connected to the connecting pipe 14. All four connecting holes 44 are located on the fixed ring 301. A compression spring 42 is provided on the side of the mounting ring 41 and the movable ring 43 that are close to each other. Both ends of the compression spring 42 are fixedly connected to the mounting ring 41 and the movable ring 43, respectively. An auxiliary rod 45 is slidably connected to the inner wall of the connecting hole 44. The four auxiliary rods 45 are fixedly connected to the movable ring 43. A protective pad 46 is fixedly connected to the end of the auxiliary rod 45 away from the movable ring 43, and the protective pad 46 abuts against the positioning ring 302. This design allows the positioning ring 302 to move away from the fixed ring 301 by the rebound of the compression spring 42 when the input pipe 15 is removed from the connecting pipe 14 via the mounting structure 3, thus facilitating subsequent disassembly of the input pipe 15 and improving the ease of operation.

[0036] The working principle of the water-recyclable silicon material cleaning tank provided by this utility model is as follows: During the cleaning process of silicon material, the used pure water in the ultrasonic tank 1 and the transition tank 2 will enter the detection and transmission device 9 through the connecting pipe 7 and the connecting pipe 8, respectively. After being detected by the detection and transmission device 9, when the pure water is within the standard range, the transmitted pure water will be reintroduced into the rinsing tank 5 through the auxiliary pipe 10. When the pure water exceeds the standard, the transmitted pure water will be transmitted into the pretreatment tank 6 through the installation pipe 11, thereby achieving the effect of pure water recycling. When personnel need to connect the input pipe 15 to the connecting pipe 14 to inject new pure water into the ultrasonic tank 1 and the transition tank 2, the personnel... The operator can first use the anti-slip sleeve 313 to move the handle 312 away from the fixed ring 301. The anti-slip sleeve 313 increases the friction between the operator's hand and the handle 312, preventing slippage during movement. Then, the handle 312 moves the limiting plate 310 away from the fixed ring 301. The limiting plate 310 moves the connecting plate 309 away from the fixed plate 304. The connecting plate 309 moves the moving block 306 away from the connecting pipe 14. The moving block 306 slides on the arc surfaces of the two limiting rods 307, which limit the movement of the moving block 306. This prevents the movable block 306 from misaligning during its sliding motion within the limiting groove 305. The movable block 306 also stretches the spring 308 until the limiting plate 310 moves to the appropriate position. Then, the operator moves the input pipe 15, which in turn moves the positioning ring 302 towards the connecting pipe 14. The positioning ring 302 then moves the two positioning rods 315 towards the connecting pipe 14. The positioning rods 315 move the guide block 316 towards the connecting pipe 14 until the positioning rods 315 slide into the inner wall of the positioning hole 314. The guide block 316 guides the positioning rods 315, facilitating their movement. 15 slides into the inner wall of the positioning hole 314, and then the positioning ring 302 moves towards the fixing ring 301 until the input pipe 15 abuts against the sealing gasket 303. The sealing gasket 303 can increase the sealing between the connecting pipe 14 and the input pipe 15 and prevent liquid from flowing out between the connecting pipe 14 and the input pipe 15. Then, the personnel release the anti-slip sleeve 313, at which time the spring 308 rebounds, causing the limiting plate 310 to move towards the fixing ring 301 until the fixing ring 301 and the positioning ring 302 slide into the inner wall of the two auxiliary grooves 311. The handle 312 can facilitate the personnel to move the limiting plate 310, which can improve the convenience of operation.

[0037] Additionally, when personnel need to disassemble the input pipe 15 by moving the two limiting plates 310, the compression spring 42 rebounds, causing the moving ring 43 to move closer to the fixed ring 301. The moving ring 43 then causes the four auxiliary rods 45 to move away from the mounting ring 41. The auxiliary rods 45 then cause the protective pads 46 to move away from the mounting ring 41. The four protective pads 46 then cause the positioning ring 302 to move away from the fixed ring 301 until the positioning ring 302 moves away from the side where the two limiting plates 310 are close to each other.

[0038] The circuits and controls involved in this utility model are all existing technologies, and will not be described in detail here.

[0039] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A water-circulating silicon material cleaning tank, characterized in that, include: The base plate (12) and the mounting structure (3) are fixedly connected to the upper surface of the base plate (12), which includes an ultrasonic tank (1), a transition tank (2), a rinsing tank (5), a pretreatment tank (6), and a detection and transmission device (9). The inner wall of the ultrasonic tank (1) is fixedly connected to a connecting pipe (7) and an inlet pipe (13). The inlet pipe (13) is fixedly connected to the transition tank (2), and the connecting pipe (7) is fixedly connected to the detection and transmission device (9). The inner wall of the transition tank (2) is fixedly connected to a connecting pipe (8), and the connecting pipe (8) is fixedly connected to the detection and transmission device (9). The inner wall of the rinsing tank (5) is fixedly connected to the ultrasonic tank (1). An auxiliary pipe (10) is connected through the pretreatment tank (6), and the auxiliary pipe (10) is fixedly connected through the detection and transmission device (9). An installation pipe (11) is fixedly connected through the inner wall of the pretreatment tank (6), and the installation pipe (11) is fixedly connected through the detection and transmission device (9). A connecting pipe (14) is fixedly connected through the inner wall of the inlet pipe (13). An input pipe (15) is installed at the end of the connecting pipe (14) away from the inlet pipe (13) by means of an installation structure (3). The arc surface of the connecting pipe (14) is provided with an installation structure (3). The installation structure (3) includes a fixing ring (301) and a positioning ring (302). The ring (301) is fixedly connected to the connecting pipe (14), the positioning ring (302) is fixedly connected to the input pipe (15), and two positioning rods (315) are fixedly connected to the side of the positioning ring (302) near the fixed ring (301). Two positioning holes (314) are opened on the inner wall of the fixed ring (301), and the positioning holes (314) are slidably connected to the positioning rods (315). Two fixing plates (304) are fixedly connected to the side of the fixed ring (301) away from the positioning ring (302). The inner wall of the fixing plate (304) is opened with a limiting groove (305), and the inner wall of the limiting groove (305) is slidably connected to a movable... The movable block (306) and the connecting plate (309) are fixedly connected. A spring (308) is provided between the side of the movable block (306) away from the connecting plate (309) and the limiting groove (305). The two ends of the spring (308) are fixedly connected to the movable block (306) and the limiting groove (305) respectively. A limiting plate (310) is fixedly connected to the side of the connecting plate (309) near the fixing ring (301). An auxiliary groove (311) is provided on the inner wall of the limiting plate (310). The auxiliary groove (311) is slidably connected to the fixing ring (301) and the positioning ring (302).

2. The water-circulating silicon material cleaning tank according to claim 1, characterized in that, The inner wall of the limiting groove (305) is fixedly connected to two limiting rods (307), and the limiting rods (307) are slidably connected to the moving block (306).

3. The water-circulating silicon material cleaning tank according to claim 1, characterized in that, Each of the two limiting plates (310) is fixedly connected to a handle (312) on the side away from each other, and the handle (312) is U-shaped.

4. The water-circulating silicon material cleaning tank according to claim 3, characterized in that, The grip (312) has an anti-slip sleeve (313) fixedly connected to its arc surface. The anti-slip sleeve (313) has a hollow circular cross-section.

5. A water-circulating silicon material cleaning tank according to claim 1, characterized in that, A sealing gasket (303) is fixedly connected to one end of the connecting pipe (14) near the input pipe (15), and the sealing gasket (303) abuts against the input pipe (15).

6. The water-circulating silicon material cleaning tank according to claim 1, characterized in that, A guide block (316) is fixedly connected to the end of the positioning rod (315) away from the positioning ring (302).

7. A water-circulating silicon material cleaning tank according to claim 1, characterized in that, The arc surface of the connecting pipe (14) is provided with an auxiliary structure (4). The auxiliary structure (4) includes a mounting ring (41), a moving ring (43), and four connecting holes (44). The mounting ring (41) is fixedly connected to the connecting pipe (14), and the moving ring (43) is slidably connected to the connecting pipe (14). The four connecting holes (44) are all opened on the fixed ring (301). A compression spring (42) is provided on the side of the mounting ring (41) and the moving ring (43) that are close to each other. The two ends of the compression spring (42) are fixedly connected to the mounting ring (41) and the moving ring (43) respectively. An auxiliary rod (45) is slidably connected to the inner wall of the connecting hole (44). The four auxiliary rods (45) are fixedly connected to the moving ring (43). A protective pad (46) is fixedly connected to the end of the auxiliary rod (45) away from the moving ring (43). The protective pad (46) abuts against the positioning ring (302).

Citation Information

Patent Citations

  • Belt cleaning device is expected with silicon to solar cell production

    CN207800565U