Photovoltaic backsheet peeling removal apparatus and its use in photovoltaic module recycling

Abstract

The present application relates to photovoltaic module recycling technical field, especially photovoltaic backboard stripping removal equipment and its application in photovoltaic module recycling, including organic frame, the frame is provided with conveying mechanism for conveying photovoltaic module, the conveying mechanism is fixedly provided with winding track, the winding track is slidably connected with auxiliary slide and main slide, the auxiliary slide is rotatably connected with pressure winding roller, the main slide is provided with winding shaft, the winding shaft is annular array type fixedly connected with multiple linear plates, the winding shaft is annular array type provided with multiple surface plates.The equipment is provided with linear plate and radially contractible and diffusible surface plate on the winding shaft alternately, the surface plate diffuses to make the backboard tightly wound when winding, the surface plate contracts and is separated from the contact with the backboard after winding, only the linear plate supports the backboard, the area of the outer end of the linear plate is much smaller than the surface plate, and the residual glue adhesion area of the backboard and the support structure is significantly reduced.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic module recycling technology, and in particular to photovoltaic backsheet stripping and removal equipment and its application in photovoltaic module recycling. Background Technology

[0002] Photovoltaic backsheets are key encapsulation and protection materials for solar photovoltaic modules. They are directly covered on the back of the solar cells and their main function is to isolate the internal and external environments of the module, protecting the solar cells from moisture, ultraviolet rays and other environmental factors, thereby extending the lifespan of the photovoltaic module. Removing the photovoltaic backsheet is a core step in the recycling of photovoltaic modules. The backsheet contains high-purity PET and fluoroplastics, and after being peeled off, it can be transformed into useful materials through melting and regranulation for use in the production of new backsheets or industrial materials.

[0003] Currently, the process of peeling off photovoltaic backsheets typically uses a roller-winding method. After the photovoltaic backsheet is peeled off, it is wound onto a roller, and then the wound photovoltaic backsheet is removed from the roller. However, the surface of the photovoltaic backsheet usually has residual adhesive threads and clumps. After the photovoltaic backsheet is wound into a cylinder, it comes into complete contact with the roller surface. The residual adhesive, combined with the radial shrinkage of the roll, causes the photovoltaic backsheet to adhere tightly to the roller surface. The adhesion area is large, making it difficult to remove the photovoltaic backsheet directly from the roller. Manual assistance is required to complete the unloading, which seriously reduces the efficiency of the peeling and removal process. Summary of the Invention

[0004] To overcome the drawback of photovoltaic backsheets being tightly adhered to the roller surface after being wound into a cylinder, resulting in a large adhesion area and making it difficult to directly remove the photovoltaic backsheets from the roller, this invention provides a photovoltaic backsheet peeling and removal device and its application in photovoltaic module recycling.

[0005] The technical solution is as follows: A photovoltaic backsheet peeling and removal device includes a frame, on which a conveying mechanism for conveying photovoltaic modules is installed. A winding track is fixedly installed on the conveying mechanism. A secondary slide and a main slide are slidably connected on the winding track. A pressure roller is rotatably connected to the secondary slide. A winding shaft is installed on the main slide. Multiple linear plates are fixedly connected in a circular array on the winding shaft. Multiple planar plates are arranged in a circular array on the winding shaft. The linear plates and planar plates are spaced apart in the circumferential direction. The planar plates can shrink and expand radially. During the winding process, the planar plates are in a expanding state, so that the backsheet can be tightly rolled. After winding, the planar plates shrink radially and disengage from the backsheet, so that the linear plates support the backsheet alone to reduce the adhesion area.

[0006] Preferably, the take-up shaft is a hollow tubular structure, with a lead screw rotatably connected inside the take-up shaft. A lead screw is threaded onto the lead screw, and the lead screw passes outward through the take-up shaft and is fixedly connected to multiple hinge seats arranged in a ring array. A hinge seat is also fixedly connected to the surface plate. A hinge rod is rotatably connected to the hinge seats of the lead screw and the surface plate. During the movement of the lead screw, the surface plate is driven to contract or expand radially through the hinge rod.

[0007] Preferably, a guide plate is fixedly connected to the take-up shaft, and multiple guide rods are slidably arranged on the guide plate. The guide rods are fixedly connected to the corresponding surface plates to provide a guiding function.

[0008] Preferably, it also includes a drive shaft, which is rotatably mounted on the main slide. A support plate is mounted on the drive shaft via a one-way bearing. Two take-up shafts are symmetrically mounted on the support plate. The drive shaft and the two take-up shafts are connected by a pulley system. When the drive shaft rotates in one direction, it drives the take-up shafts to take up the back plate. When the drive shaft rotates in the other direction, it drives the support plate to rotate to switch the positions of the two take-up shafts.

[0009] Preferably, the device also includes a limiting support, which is fixed to the frame and has a limiting rod fixed to it. The limiting rod can contact the surface of the support plate to keep the support plate in a horizontal position during the winding of the back plate.

[0010] Preferably, it also includes an internal gear ring, which is fixed to the frame, an external gear ring is fixed to the main slide, and a gear is fixed to the take-up shaft. During the switching of the two take-up shaft positions, the internal gear ring and the external gear ring drive the gear to rotate in different directions, causing the surface plate on the corresponding take-up shaft to contract or expand.

[0011] Preferably, the system also includes a slide block slidably mounted on a winding track, an electric push rod fixedly connected to the slide block, and a peeling ring fixedly mounted on the electric push rod. The inner wall of the peeling ring can fit against the outer end of the linear plate to push the back plate down.

[0012] Preferably, the conveying mechanism is provided with a mold frame, which is used to place and fix the photovoltaic module to be peeled off the backsheet. Two pressure seats are fixedly provided on the conveying mechanism, and a flattening roller is rotatably connected to the two pressure seats. The flattening roller is used to flatten the surface of the backsheet.

[0013] Preferably, the system also includes an electric slide table, which is mounted on the frame. A main cylinder is fixedly connected to the sliding end of the electric slide table. A lifting platform is fixedly connected to the telescopic shaft of the main cylinder. A switching shaft is rotatably connected to the lifting platform. Two scrapers are centrally symmetrically fixed to the switching shaft. The positions of the two scrapers can be switched by rotating the switching shaft. An auxiliary cylinder is fixedly connected to the lifting platform. A pressure knife is fixedly connected to the telescopic shaft of the auxiliary cylinder. The pressure knife is used to press one end of the back plate onto the scraper for traction. A traction guide rail is fixedly connected to the lifting platform. A removal seat is slidably connected to the traction guide rail. The removal seat is used to scrape off residual adhesive from the surface of the scraper.

[0014] The application of photovoltaic backsheet stripping and removal equipment in photovoltaic module recycling, used to recycle photovoltaic backsheets from photovoltaic modules.

[0015] The beneficial effects of this invention are as follows: This equipment alternately sets linear plates and radially shrinkable and diffuseable planar plates on the winding shaft. During winding, the planar plates diffuse to tightly roll the back plate into a coil. After winding is complete, the planar plates shrink and detach from the back plate, with only the linear plates supporting the back plate. Utilizing the characteristic that the outer end area of ​​the linear plates is much smaller than that of the planar plates, the residual adhesive area between the back plate and the supporting structure is significantly reduced. The rolled back plate can be automatically pushed off without manual assistance, solving the problems of complete contact between the back plate and the roller after winding, large adhesion area, and difficulty in unloading in the prior art. It employs a double winding mechanism. The station switching mechanism, consisting of a shaft, a one-way bearing, and a support plate, automatically switches between the winding station and the unloading station via the forward and reverse rotation of the drive motor. This enables continuous backsheet peeling and removal operations, significantly improving production efficiency. Simultaneously, the backsheet is pre-rolled and flattened by the flattening roller, and the backsheet front end is automatically lifted and pulled by the shovel and pressure blade in coordination. The automatic cleaning and alternating use of the shovel by the switching shaft in conjunction with the rejection seat further ensures the automation and continuity of the entire backsheet peeling, winding, and unloading process, enhancing the overall efficiency and value of photovoltaic module recycling. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 This is a schematic diagram showing the positional relationship of the main slide block in this invention.

[0018] Figure 3 This is a schematic diagram showing the positional relationship of the take-up shaft in this invention.

[0019] Figure 4 This is a schematic diagram of the cross-sectional structure of the winding shaft of the present invention.

[0020] Figure 5 This is a schematic diagram of the fixing ring structure of the present invention.

[0021] Figure 6 This is a schematic diagram illustrating the positional relationship of Zen Taoism in this invention.

[0022] Explanation of reference numerals in the attached drawings: 10_Frame, 11_Conveying mechanism, 12_Rewinding track, 13_Secondary slide, 14_Main slide, 15_Pressure roller, 16_Rewinding shaft, 17_Linear plate, 18_Surface plate, 20_Screw, 21_Screw nut, 22_Hinge seat, 23_Hinge rod, 24_Guide plate, 25_Guide rod, 30_Drive shaft, 31_Support plate, 32_One-way bearing, 33_Pulley assembly, 34_Drive motor, 35_ Limiting support, 36_limiting rod, 40_internal gear ring, 41_gear, 42_external gear ring, 43_electric push rod, 44_fixed ring, 45_peeling ring, 46_slider, 50_mold frame, 51_pressure seat, 52_flattening roller, 60_electric slide, 61_main cylinder, 62_lifting platform, 63_switching shaft, 64_shovel, 65_auxiliary cylinder, 66_pressing knife, 67_traction guide rail, 68_removal seat, 69_traction motor. Detailed Implementation

[0023] The following description is only a preferred embodiment of the present invention and does not limit the scope of protection of the present invention.

[0024] Example 1: Photovoltaic backsheet stripping and removal equipment, such as Figures 1-3As shown, the system includes a frame 10, a conveying mechanism 11, a winding track 12, a secondary slide 13, a main slide 14, a pressure roller 15, a winding shaft 16, a linear plate 17, and a surface plate 18. The frame 10 is fixedly connected to the conveying mechanism 11 for conveying photovoltaic modules. The conveying mechanism 11 uses existing conveying equipment capable of applying sufficient thrust or traction to the photovoltaic modules, such as a chain conveyor. The chain conveyor has multiple equidistantly distributed protrusions on its chain plate surface to apply sufficient thrust. Two winding tracks 12 are symmetrically fixed to the upper end of the conveying mechanism 11, extending in the front-rear direction. The secondary slide 13 and the main slide 14 are slidably connected to the winding track 12, with the main slide 14 located in front of the secondary slide 13. A pressure roller 15 is rotatably connected to the secondary slide 13, and the surface of the pressure roller 15 is covered with a rubber layer to accommodate the backsheet winding. During the winding process, the thickness changes. A winding shaft 16 is provided on the main slide 14. The axis of the winding shaft 16 is perpendicular to the conveying direction of the photovoltaic module. Four linear plates 17 are fixedly connected to the winding shaft 16 in a ring array. Four planar plates 18 are arranged in a ring array on the winding shaft 16. The linear plates 17 and planar plates 18 are spaced apart in the circumferential direction. The planar plates 18 can shrink and expand radially. The end of the linear plate 17 away from the winding shaft 16 is arc-shaped. The distance between the outer ends of two opposite linear plates 17 is the same as the outer diameter of the planar plate 18 in the expanded state. During the winding process, the planar plate 18 is in the expanded state, so that the back sheet can be tightly rolled. After the winding is completed, the planar plate 18 shrinks radially and disengages from the back sheet, so that the linear plate 17 supports the back sheet alone. The area of ​​the outer end of the back sheet is much smaller than that of the planar plate 18, thereby reducing the adhesion area of ​​residual adhesive on the back sheet and making it easier to remove the rolled back sheet.

[0025] Figure 3 and Figure 4 As shown, it also includes a lead screw 20, a lead screw 21, a hinge seat 22, and a hinge rod 23 for controlling the radial movement of the surface plate 18. The take-up shaft 16 is a hollow tubular structure. The lead screw 20 is rotatably connected inside the take-up shaft 16. The lead screw 20 has two symmetrical threads, and a lead screw 21 is threaded onto each thread. The take-up shaft 16 has a slide for guiding the lead screw 21. The outer end of the lead screw 21 extends outward from the slide onto the take-up shaft 16. Four hinge seats 22 arranged in a ring array are fixed to the outer end of the lead screw 21. The inner end of the surface plate 18 is also fixed to a hinge seat 22. A hinge rod 23 is rotatably connected to the hinge seats 22 of the lead screw 21 and the surface plate 18. During the movement of the two leads screw 21 towards or away from each other, the surface plate 18 is driven to contract or expand radially through the hinge rod 23.

[0026] like Figure 3As shown, it also includes guide plates 24 and guide rods 25. Four sets of guide plates 24 arranged in a circular array are fixedly connected to the take-up shaft 16. Two guide plates 24 in each set are symmetrically distributed from left to right. Four guide rods 25 arranged in a circular array are slidably disposed on the guide plates 24. The four guide rods 25 slide radially along the take-up shaft 16. One end of the guide rod 25 away from the take-up shaft 16 is fixedly connected to the inner end of the surface plate 18. The guide rods 25 provide guidance for the radial movement of the surface plate 18 and prevent the surface plate 18 from shifting left or right.

[0027] This equipment is designed for photovoltaic modules after the frame and junction box have been removed, and the process it targets is the backsheet removal process. Before starting the backsheet removal, the photovoltaic module needs to be heated using existing heating equipment to soften the encapsulant film, making it easier to peel off the backsheet. Heating and softening the encapsulant film is a conventional technique in this field, and technicians can select existing heating equipment according to their needs. When winding up the backsheet, the heated photovoltaic module is intermittently conveyed forward using the conveyor mechanism 11. When the front end of the backsheet moves to the winding shaft 16 and the pressure roller 15... During the process, a small section of the front end of the backsheet is peeled off. Then, the front end of the backsheet is pulled upwards between the pressure roller 15 and the take-up shaft 16. The main slide 14 and the auxiliary slide 13 are then controlled to move towards each other to clamp the backsheet. The take-up shaft 16 is then controlled to rotate counterclockwise to take up the backsheet. At the same time, the conveying mechanism 11 is controlled to synchronously convey the photovoltaic module corresponding to the backsheet forward. This significantly shortens the distance between the clamping point and the actual peeling point of the backsheet, avoiding tearing of the backsheet midway due to excessive force transmission distance. This ensures that the backsheet can be completely peeled off, thereby allowing the entire backsheet to be removed. This method increases the recycling value of photovoltaic modules compared to the crushing method used in existing technologies. It facilitates sorting and processing and does not generate a large amount of dust. After the backsheet is wound up, the control screw 20 rotates clockwise. The clockwise rotation of the screw 20 causes the two screw nuts 21 to move closer together. When the screw nuts 21 move closer together, they cause the four surface plates 18 to retract towards the center through the hinge rod 23 and the hinge seat 22. The surface plates 18 and the backsheet are no longer in contact. At this time, the backsheet is only supported by the linear plate 17, thereby reducing the adhesion surface of the backsheet. The photovoltaic backsheet is then pushed down to the right from the linear plate 17, and the lead screw 20 is controlled to rotate counterclockwise. The counterclockwise rotation of the lead screw 20 will cause the two lead nuts 21 to move away from each other. When the lead nuts 21 move away from each other, they will cause the four surface plates 18 to spread outwards through the hinge rod 23 and the hinge seat 22, so as to facilitate the winding of the next backsheet and to make the backsheet tightly rolled up during the winding process. During the shrinking or spreading process of the surface plates 18, the guide rod 25 and the guide plate 24 can guide the surface plates 18 to ensure that the surface plates 18 move radially.

[0028] Example 2: Based on Example 1, such as Figure 2 and Figure 3As shown, it also includes a drive shaft 30, a support plate 31, a one-way bearing 32, a pulley set 33, and a drive motor 34. The drive shaft 30 is rotatably connected to the main slide 14. The support plate 31 is mounted on the drive shaft 30 via the one-way bearing 32. Two take-up shafts 16 are symmetrically mounted on the support plate 31. The drive shaft 30 and the two take-up shafts 16 are connected by a pulley set 33, which consists of a double-groove pulley and two single-groove pulleys. The wheel is fixed to the drive shaft 30, and the two single-groove pulleys are fixed to the two take-up shafts 16 respectively. The drive motor 34 is fixed to the main slide 14. The output shaft of the drive motor 34 is fixed to one end of the drive shaft 30. When the drive shaft 30 rotates counterclockwise, it will not drive the support plate 31 to rotate through the one-way bearing 32, but it will drive the two take-up shafts 16 to rotate synchronously through the pulley group 33. When the drive shaft 30 rotates clockwise, it will drive the support plate 31 to rotate to switch the position of the two take-up shafts 16.

[0029] like Figure 1 As shown, it also includes a limit support 35 and a limit rod 36. The limit support 35 is fixedly connected to the frame 10, and the limit rod 36 is fixedly connected to the limit support 35. When the main slide 14 moves to the winding station, the lower end face of the limit rod 36 contacts the upper end face of the support plate 31. The limit rod 36 restricts the rotation of the support plate 31, keeps the support plate 31 in a horizontal position, and prevents the support plate 31 from swinging during the winding of the back plate.

[0030] like Figure 2 and Figure 3 As shown, it also includes an internal gear ring 40, a gear 41, and an external gear ring 42. The internal gear ring 40 is fixedly connected to the frame 10, and the external gear ring 42 is fixedly connected to the main slide 14 on the opposite side of the drive motor 34. Gears 41 are fixedly connected to both take-up shafts 16. During the clockwise rotation of the drive shaft 30, the external gear ring 42 drives the lead screw 20 to rotate clockwise through the gear 41 to control the radial contraction of the corresponding surface plate 18. The internal gear ring 40 drives the lead screw 20 to rotate counterclockwise through the gear 41 to control the radial expansion of the corresponding surface plate 18. Thus, the contraction or expansion of the surface plate 18 on the two take-up shafts 16 is controlled during the switching of their positions.

[0031] During the counterclockwise rotation of the drive shaft 30 driven by the drive motor 34, the drive shaft 30 does not drive the support plate 31 to rotate via the one-way bearing 32. Instead, it drives the two take-up shafts 16 to rotate synchronously counterclockwise via the pulley set 33. The take-up shaft 16 closer to the pressure roller 15 will drive the face plate 18 to start taking up the back roll. After the take-up is completed, the main slide 14 and the auxiliary slide 13 are controlled to move away from each other. Then, the drive motor 34 is controlled to drive the drive shaft 30 to rotate 180 degrees clockwise. When the drive shaft 30 rotates clockwise, it will drive the support plate 31 to rotate clockwise via the one-way bearing 32, thereby switching the positions of the two take-up shafts 16 and switching the take-up shaft 16 with the back plate. The winding shaft 16, which is not wound with the back sheet, is switched from the unwound station to the winding station. Then, the main slide 14 and the auxiliary slide 13 are brought closer together again to start winding the back sheet of the next photovoltaic module, thereby realizing continuous winding of the back sheet and improving the efficiency of back sheet peeling and removal. It should be noted that when the main slide 14 and the auxiliary slide 13 move away from each other and complete the reset, this position is the switching station. When the main slide 14 is in the switching station, the drive shaft 30 is concentric with the internal gear ring 40 and the external gear ring 42. When the drive shaft 30 rotates clockwise, the internal gear ring 40 and the external gear ring 42 can mesh with the gear 41 to switch the state of the surface plate 18.

[0032] Example 3: Based on Example 2, such as Figure 2 and Figure 5 As shown, it also includes an electric push rod 43, a fixing ring 44, a peeling ring 45, and a slide block 46. The right-side winding track 12 is slidably connected to the slide block 46. The electric push rod 43 is fixedly connected to the slide block 46. The fixing ring 44 is fixedly connected to the telescopic shaft of the electric push rod 43. The peeling ring 45 is fixedly connected to the fixing ring 44. Both the fixing ring 44 and the peeling ring 45 are C-shaped, and the annular inner wall of the peeling ring 45 can be in close contact with the outer end of the linear plate 17 so as to push the rolled back plate on the linear plate 17 off through the peeling ring 45.

[0033] When the take-up shaft 16 with the back plate is switched to the front unloading station, the take-up shaft 16 and the peeling ring 45 are concentric. They move synchronously from the slide 46 and the main slide 14 in the front-back direction, that is, synchronously forward or synchronously backward. This ensures that the peeling ring 45 is always concentric with the take-up shaft 16 at the unloading station. During the take-up process of the other take-up shaft 16, the electric push rod 43 is controlled to retract. The electric push rod 43 drives the fixing ring 44 and the peeling ring 45 to move from the left end to the right end of the take-up shaft 16. The peeling ring 45 and the surface of the linear plate 17 are in contact. Thus, the back plate supported by the linear plate 17 is pushed down by the peeling ring 45, realizing the automatic unloading of the back plate. After the unloading is completed, the electric push rod 43 is controlled to drive the fixing ring 44 to reset.

[0034] like Figure 1As shown, it also includes a mold frame 50, pressure seats 51, and flattening rollers 52. The mold frame 50 is provided on the conveying mechanism 11. The mold frame 50 is used to place and fix the photovoltaic module to be peeled off the backsheet. Technicians can add electric or pneumatic clamps to the mold frame 50. During the peeling process, the photovoltaic module is clamped and fixed by the clamps to prevent the photovoltaic module from falling out of the mold frame 50. When placing the photovoltaic module, the backsheet needs to be on the upper side, and the height of the backsheet is higher than the top of the mold frame 50 to facilitate shoveling. Two pressure seats 51 are symmetrically fixed on the left and right sides of the conveying mechanism 11. The flattening rollers 52 are rotatably connected to the two pressure seats 51. The flattening rollers 52 are used to flatten the surface of the backsheet to facilitate shoveling and peeling.

[0035] Before peeling off the backsheet, the photovoltaic module to be peeled off is placed in the mold frame 50 and conveyed. When the mold frame 50 passes under the flattening roller 52, the flattening roller 52 can flatten the surface of the backsheet, thus facilitating peeling.

[0036] like Figure 1 and Figure 6 As shown, it also includes an electric slide 60, a main cylinder 61, a lifting platform 62, a switching shaft 63, a blade 64, an auxiliary cylinder 65, a pressing blade 66, a traction guide rail 67, a removal seat 68, and a traction motor 69. The electric slide 60 is mounted on the frame 10. The main cylinder 61 is fixedly connected to the sliding end of the electric slide 60. The lifting platform 62 is fixedly connected to the telescopic shaft of the main cylinder 61. The switching shaft 63 is rotatably connected to the lifting platform 62. The traction motor 69 is fixedly connected to the lifting platform 62. The output shaft of the traction motor 69 is fixedly connected to one end of the switching shaft 63. Two blades 64 are centrally symmetrically fixed to the switching shaft 63. The positions of the two scrapers 64 can be switched by rotating the switching shaft 63, so that one scraper 64 is in the cleaning state and the other scraper 64 is in the use state. A secondary cylinder 65 is fixedly connected to the lifting platform 62, and a pressing blade 66 is fixedly connected to the telescopic shaft of the secondary cylinder 65. The pressing blade 66 is used to press one end of the back plate onto the scraper 64 for traction. A traction guide rail 67 is fixedly connected to the lifting platform 62, and a scraping seat 68 is slidably connected to the traction guide rail 67. The scraping seat 68 has a groove, the shape of which matches the shape of the end of the scraper 64, so that the residual glue on the surface of the scraper 64 can be scraped off by the scraping seat 68.

[0037] When the front side of the backplate is conveyed to below the scraper 64, the main cylinder 61 extends to lower the lifting platform 62, bringing the blade tip of the scraper 64 and the lower end of the front side of the backplate to the same horizontal plane. As the backplate continues to be conveyed forward, the scraper 64 scoops up the front end of the backplate. Then, the auxiliary cylinder 65 extends to press the scraped end of the backplate against the scraper 64 with the pressure blade 66. Then, the main cylinder 61 retracts, pulling the scraped backplate upward between the pressure roller 15 and the take-up shaft 16. The electric slide 60 can also move the lifting platform 62 horizontally, pulling the backplate upward above the take-up shaft 16 so that it adheres to the take-up shaft 16. Finally, the auxiliary cylinder 65 retracts, releasing the clamping of the scraper 64 and the pressure blade 66 on the backplate. To facilitate the reeling of the backsheet; when the scraper 64 is used up and the main cylinder 61 is in the retracted state, the traction motor 69 is controlled to drive the switching shaft 63 to rotate 180 degrees, thereby switching the scraper 64. Then, the removal seat 68 is controlled to move along the traction guide rail 67. The residual adhesive on the used scraper 64 is scraped off by the removal seat 68. During this process, another cleaned scraper 64 can continue to be used, thereby achieving continuous peeling of the backsheet. It should be noted that technicians can also install an air gun on the frame 10. The air gun is at the same height as the removal seat 68 and blows air in the left and right directions. The air gun blows airflow to the opposite side to prevent the residual adhesive from falling down onto the photovoltaic module during the removal process and to avoid a large amount of residual adhesive remaining on the removal seat 68.

[0038] It should also be noted that the sliding fit between each slide and the guide rail in this device, as well as the driving method of the slide, can adopt mechanical structures known in the art, such as screw and nut transmission, gear and rack transmission, linear motor drive, cylinder or hydraulic cylinder drive, etc. Those skilled in the art can choose according to actual working conditions and load requirements. This is not the focus of the improvement of this invention, so its specific driving structure and principle will not be described in detail.

[0039] The application of photovoltaic backsheet stripping and removal equipment in photovoltaic module recycling, used to recycle photovoltaic backsheets from photovoltaic modules.

[0040] The above description is merely an embodiment of the present invention and is not intended to limit the present invention. All equivalent substitutions made within the principles of the present invention should be included within the scope of protection of the present invention. Contents not described in detail in this invention are existing technologies known to those skilled in the art.

Claims

1. Photovoltaic backsheet stripping removal apparatus comprising a mechanical frame (10) provided with a conveying mechanism (11) for conveying the photovoltaic modules, characterized in that, A winding track (12) is fixedly installed on the conveying mechanism (11). A secondary slide (13) and a main slide (14) are slidably connected on the winding track (12). A pressure roller (15) is rotatably connected on the secondary slide (13). A winding shaft (16) is installed on the main slide (14). Multiple linear plates (17) are fixedly connected in a ring array on the winding shaft (16). Multiple planar plates (18) are arranged in a ring array on the winding shaft (16). The linear plates (17) and planar plates (18) are spaced apart in the circumferential direction. The planar plates (18) can shrink and spread in the radial direction. During the winding process, the planar plates (18) are in a spreading state, so that the back plate can be tightly rolled. After winding is completed, the planar plates (18) shrink in the radial direction and disengage from the back plate, so that the linear plates (17) support the back plate alone to reduce the adhesion area.

2. The photovoltaic backsheet strip-off removal apparatus of claim 1, wherein, The take-up shaft (16) is a hollow tubular structure. A lead screw (20) is rotatably connected inside the take-up shaft (16). A lead screw (21) is threaded onto the lead screw (20). The lead screw (21) passes outward through the take-up shaft (16) and is fixedly connected to multiple hinge seats (22) arranged in a ring array. A hinge seat (22) is also fixedly connected to the surface plate (18). A hinge rod (23) is rotatably connected to the hinge seats (22) of the lead screw (21) and the surface plate (18). During the movement of the lead screw (21), the surface plate (18) is driven to contract or expand radially through the hinge rod (23).

3. The photovoltaic backsheet strip-off removal apparatus of claim 2, wherein, A guide plate (24) is fixedly connected to the winding shaft (16), and multiple guide rods (25) are slidably arranged on the guide plate (24). The guide rods (25) and the corresponding surface plates (18) are fixedly connected to provide guidance.

4. The photovoltaic backsheet strip-off removal apparatus of claim 2, wherein, It also includes a drive shaft (30), which is rotatably mounted on the main slide (14). A support plate (31) is mounted on the drive shaft (30) via a one-way bearing (32). Two take-up shafts (16) are symmetrically mounted on the support plate (31). The drive shaft (30) and the two take-up shafts (16) are connected by a pulley group (33). When the drive shaft (30) rotates in one direction, it will drive the take-up shafts (16) to take up the back plate. When the drive shaft (30) rotates in the other direction, it will drive the support plate (31) to rotate to switch the positions of the two take-up shafts (16).

5. The photovoltaic backsheet stripping and removal equipment according to claim 4, characterized in that, It also includes a limit support (35), which is fixed to the frame (10). A limit rod (36) is fixed to the limit support (35). The limit rod (36) can contact the surface of the support plate (31) so that the support plate (31) maintains a horizontal posture during the winding back plate process.

6. The photovoltaic backsheet stripping and removal equipment according to claim 5, characterized in that, It also includes an internal gear ring (40), which is fixed to the frame (10). An external gear ring (42) is fixed to the main slide (14), and a gear (41) is fixed to the take-up shaft (16). During the switching of the two take-up shafts (16), the internal gear ring (40) and the external gear ring (42) drive the gear (41) to rotate in different directions, causing the surface plate (18) on the corresponding take-up shaft (16) to contract or expand.

7. The photovoltaic backsheet stripping and removal equipment according to claim 4, characterized in that, It also includes a slide (46) which is slidably mounted on the winding track (12). An electric push rod (43) is fixedly connected to the slide (46). A peeling ring (45) is fixedly mounted on the electric push rod (43). The annular inner wall of the peeling ring (45) can fit and contact the outer end of the linear plate (17) to push the back plate down.

8. The photovoltaic backsheet stripping and removal equipment according to claim 1, characterized in that, A mold frame (50) is provided on the conveying mechanism (11). The mold frame (50) is used to place and fix the photovoltaic module to be peeled off the back sheet. Two pressure seats (51) are fixedly provided on the conveying mechanism (11). A flattening roller (52) is rotatably connected to the two pressure seats (51). The flattening roller (52) is used to flatten the surface of the back sheet.

9. The photovoltaic backsheet stripping and removal equipment according to claim 1, characterized in that, It also includes an electric slide (60), which is mounted on the frame (10). The sliding end of the electric slide (60) is fixedly connected to a main cylinder (61). A lifting platform (62) is fixedly connected to the telescopic shaft of the main cylinder (61). A switching shaft (63) is rotatably connected to the lifting platform (62). Two scrapers (64) are centrally symmetrically fixed on the switching shaft (63). The position of the two scrapers (64) can be switched by rotating the switching shaft (63). A secondary cylinder (65) is fixedly connected to the lifting platform (62). A pressure knife (66) is fixedly connected to the telescopic shaft of the secondary cylinder (65). The pressure knife (66) is used to press one end of the back plate onto the scraper (64) for traction. A traction guide rail (67) is fixedly connected to the lifting platform (62). A removal seat (68) is slidably connected to the traction guide rail (67). The removal seat (68) is used to scrape off the residual glue on the surface of the scraper (64).

10. The application of the photovoltaic backsheet stripping and removal equipment according to any one of claims 1-9 in photovoltaic module recycling, characterized in that, Used for recycling photovoltaic backsheets from photovoltaic modules.

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