A base film winding device for photovoltaic backboard production

Abstract

The application discloses a base film winding device for photovoltaic backboard production and belongs to the base film winding device field.The device comprises a rack assembly, one end of the rack assembly is provided with a dust removal assembly for dust removal on the back surface of the base film, the other end of the rack assembly is provided with an adjusting assembly for adjusting the distance between the base film, the electrostatic dust removal head is connected with the wallboard through a second driving cylinder, and a winding diameter detection signal is introduced as a control basis; when the base film winding diameter on the winding shaft gradually increases with the winding time, the second driving cylinder is automatically retracted according to the detection signal, drives the adjusting plate to swing around the rotating shaft, and makes the electrostatic dust removal head gradually move away from the winding shaft; on the contrary, when the winding diameter is small, the cylinder is extended to make the dust removal head close to the surface of the base film; through the dynamic distance adjusting mechanism, the distance between the electrostatic dust removal head and the front surface of the base film is always maintained in the preset optimal effective dust removal range, the dust removal effect is kept highly consistent in the whole winding process, and therefore, the dust removal blind area or effect decrease caused by the distance change of the front surface of the base film is effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of base film winding devices, and particularly to a base film winding device for photovoltaic backsheet production. Background Technology

[0002] Photovoltaic backsheets are crucial protective materials in photovoltaic modules, and their production process requires a polymer base film as the base layer. After coating and lamination processes, the base film needs to be neatly and tightly wound using a winding device to facilitate subsequent storage and processing. The winding quality directly affects the flatness of the backsheet, interlayer adhesion, and the final product yield.

[0003] In the production of photovoltaic backsheets, existing base film winding devices use traction rollers to uniformly draw the base film from the unwinding or processing station and use a tension control system to regulate tension fluctuations during winding to ensure that the base film does not stretch, deform, or slip during winding. An air shaft or mechanical shaft is used as the winding mandrel, which, together with pressure rollers, tightly winds the base film onto the paper core or plastic core tube. At the same time, an edge correction device adjusts the lateral position of the base film in real time to ensure that the winding end face is neat. Fixed dust removal structures such as brushes, static elimination rods, or dust suction ports are set in the winding path to remove dust, particulate matter, and other impurities that adhere to the surface of the base film in previous processes, thereby reducing dirt defects in the finished backsheet.

[0004] In summary, in existing technologies, the winding diameter of the base film gradually increases with winding time during the winding process. This causes dynamic changes in the relative distance and contact angle between the base film surface and the fixed dust removal structure. When the winding diameter is small, the base film surface moves away from the dust removal structure, leading to a decrease in suction negative pressure, insufficient brush contact pressure, and a significant reduction in dust removal efficiency. Furthermore, existing dust removal structures typically only act on the front side of the base film, lacking effective dust removal methods for the side in contact with the winding shaft. This results in residual particles on the reverse side easily embedding into the base film surface or transferring to adjacent layers under winding pressure, causing indentations, scratches, or poor backing adhesion. Summary of the Invention In order to overcome the above-mentioned technical problems, the present invention aims to provide a base film winding device for photovoltaic backsheet production, which can solve the problem in the prior art that, due to the gradual increase of the base film winding diameter during the winding process with the winding time, the relative distance and contact angle between the base film surface and the fixed dust removal structure will change dynamically. When the winding diameter is small, the base film surface is far away from the dust removal structure, resulting in the attenuation of dust suction negative pressure, insufficient brush contact pressure, and a significant decrease in dust removal effect.

[0005] The objective of this invention can be achieved through the following technical solutions: A base film winding device for photovoltaic backsheet production includes a frame assembly, one end of which is provided with a dust removal component for removing dust from the back of the base film, and the other end of which is provided with an adjustment component for adjusting the distance between the base film and the adjustment component. The frame assembly includes a wall panel, one end of which is provided with a conveying roller, and the bottom end of which is rotatably connected to a rotating shaft; The dust removal assembly includes a crossbar and an arc-shaped collection trough. The surface of the crossbar is provided with fixing parts for dust removal at equal intervals. The arc-shaped collection trough is slidably connected to an arc-shaped sealing cover plate for scraping off the dust film on the inner wall of the arc-shaped collection trough. The adjustment assembly includes a second drive cylinder, the output end of which is provided with an adjustment plate, and one end of the adjustment plate is provided with an electrostatic dust removal head for removing dust from the front side of the base film.

[0006] Preferably, a guide roller is provided below the conveying roller for guiding, and the arc-shaped collecting groove is arranged parallel to the guide roller.

[0007] Preferably, the wall panel is provided with supports symmetrically at both ends, and the supports are slidably connected to sliders on their surfaces, with the crossbar fixedly connected to the top of the sliders. Preferably, the two ends of the wall panel are symmetrically provided with a first drive cylinder for moving the crossbar, and the output end of the first drive cylinder is movably connected to the two ends of the crossbar.

[0008] Preferably, the top of the crossbar is provided with a sliding groove, the fixing member is movably connected to the top of the crossbar through the sliding groove, and one end of the fixing member is provided with a mouthpiece.

[0009] Preferably, the surface of the arc-shaped collection trough is provided with a dust scraping groove, and a scraper is provided at intervals at one end of the arc-shaped sealing cover. The scraper is slidably connected inside the dust scraping groove. One end of the arc-shaped collection trough is provided with a dust removal port, and the dust removal port is connected to an external industrial vacuum cleaner through a pipeline controlled by a solenoid valve.

[0010] Preferably, a drive motor is provided at one end of the wall panel, and the output end of the drive motor is connected to a winding shaft for winding the base film through a chain transmission mechanism. A synchronous belt is sleeved on one end of the winding shaft, and a traction roller is provided at one end of the synchronous belt. The traction roller is rotatably connected to the lower part of the inner cavity of the wall panel.

[0011] Preferably, a pivot is provided at the lower end of the other end of the wall panel, and the bottom of the adjusting plate is fixedly connected to one end of the pivot.

[0012] Preferably, the arc-shaped sealing cover can slide axially and rotate 180 degrees relative to the arc-shaped collecting groove, so that the openings of the arc-shaped collecting groove and the arc-shaped sealing cover face each other, forming a complete cylindrical cavity. One end of the arc-shaped sealing cover is provided with a sealing magnetic strip for sealing after the connection.

[0013] Preferably, the electrostatic dust removal head is connected to the wall panel via a second drive cylinder. The extension and retraction of the second drive cylinder is controlled by the winding diameter detection signal, which is used to dynamically adjust the distance between the electrostatic dust removal head and the surface of the base film wound by the winding shaft as the base film roll diameter changes, and maintain it within a preset range.

[0014] The present invention provides a base film winding device for photovoltaic backsheet production, which, compared with the prior art, has the following beneficial effects, but is not limited to: 1. This invention connects the electrostatic dust removal head to the wall panel via a second drive cylinder and introduces a winding diameter detection signal as the control basis. When the diameter of the base film roll on the winding shaft gradually increases with the winding time, the second drive cylinder automatically retracts according to the detection signal, driving the adjustment plate to swing around the shaft, so that the electrostatic dust removal head gradually moves away from the winding shaft. Conversely, when the roll diameter is small, the cylinder extends to bring the dust removal head closer to the base film surface. Through this dynamic distance adjustment mechanism, the distance between the electrostatic dust removal head and the front surface of the base film is always maintained within the preset optimal effective dust removal range, ensuring that the dust removal effect remains highly consistent throughout the entire winding process, thereby effectively avoiding dust removal blind spots or reduced effect on the front surface of the base film caused by changes in distance.

[0015] 2. This invention features a dedicated dust removal component for the back of the base film at one end of the frame assembly. Through equally spaced fixing parts and nozzles on the crossbar, combined with a first drive cylinder driving the crossbar to reciprocate along the width of the base film, active and uniform blowing is achieved on the back of the base film. This effectively removes dust, fibers, and other particles adhering to the back side. The removed dust falls into an arc-shaped collection trough parallel to the guide roller under gravity and airflow guidance. A closed-loop negative pressure suction is then performed via a solenoid valve connected to the dust removal port and an external industrial vacuum cleaner. This reduces the residual particulate matter rate on the back side of the base film, which is in direct contact with the winding shaft. This avoids the problems in existing technologies where residual particulate matter on the back side embeds into the base film surface or transfers to adjacent layers under winding pressure, causing indentations, scratches, or poor backing adhesion. Attached Figure Description

[0016] The invention will now be further described with reference to the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the front structure of the present invention; Figure 3 This is a schematic diagram of the rear structure of the present invention; Figure 4 This is a schematic diagram of the internal structure of the present invention; Figure 5 This is a partial structural breakdown diagram of the present invention; Figure 6 This is the present invention. Figure 1 Enlarged view of the structure at point A in the middle.

[0018] In the diagram: 1. Frame assembly; 2. Dust removal assembly; 3. Adjustment assembly; 11. Wall panel; 12. Conveyor roller; 13. Guide roller; 14. Drive motor; 21. Bracket; 22. Crossbar; 220. Slide groove; 23. Slider; 24. Fixing component; 240. Nozzle; 25. First drive cylinder; 26. Arc-shaped collection trough; 260. Dust scraper trough; 261. Dust removal port; 27. Arc-shaped sealing cover; 270. Scraper; 271. Magnetic strip; 31. Rewinding shaft; 32. Traction roller; 33. Synchronous belt; 34. Second drive cylinder; 35. Adjustment plate; 36. Rotating shaft; 37. Electrostatic dust removal head. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings showing multiple embodiments according to this application. It should be understood that the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments described in this application without creative effort will fall within the scope of protection of this application.

[0020] like Figure 1-6 As shown, a base film winding device for photovoltaic backsheet production includes a frame assembly 1, a dust removal component 2 for removing dust from the back of the base film at one end of the frame assembly 1, and an adjustment component 3 for adjusting the distance between the frame assembly 1 and the base film at the other end of the frame assembly 1. The frame assembly 1 includes a wall panel 11, a conveyor roller 12 is provided at one end of the wall panel 11, and a rotating shaft 36 is rotatably connected to the bottom end of the wall panel 11. The conveyor roller 12 is used to smoothly introduce the base film from the upstream process into the winding area. The dust removal assembly 2 includes a crossbar 22 and an arc-shaped collection groove 26. The surface of the crossbar 22 is provided with fixed parts 24 for dust removal at equal intervals. The arc-shaped collection groove 26 is slidably connected to an arc-shaped sealing cover 27 for scraping the dust film on the inner wall of the arc-shaped collection groove 26. By extending and retracting the first drive cylinder 25, the crossbar 22 and the fixed parts 24 on it can be driven to move back and forth along the width direction of the base film to achieve dynamic cleaning of the back of the base film. The adjustment component 3 includes a second drive cylinder 34, the output end of which is provided with an adjustment plate 35, and one end of the adjustment plate 35 is provided with an electrostatic dust removal head 37 for removing dust from the front side of the base film.

[0021] Below the conveying roller 12, a guide roller 13 is provided for guiding. An arc-shaped collection groove 26 is arranged parallel to the guide roller 13 to collect dust falling from the back of the base film. Supports 21 are symmetrically arranged at both ends of the wall panel 11. A slider 23 is slidably connected to the surface of the support 21. A crossbar 22 is fixedly connected to the top of the slider 23. A first driving cylinder 25 is symmetrically arranged at both ends of the wall panel 11 to drive the crossbar 22 to move. The output end of the first driving cylinder 25 is movably connected to both ends of the crossbar 22. The guide roller 13 is used to change the direction of the base film and maintain stable tension.

[0022] The top of the crossbar 22 is provided with a slide groove 220. The fixing member 24 is movably connected to the top of the crossbar 22 through the slide groove 220 and can be adjusted along the slide groove 220 and then locked. One end of the fixing member 24 is provided with a nozzle 240. The outlet of the nozzle 240 faces the back of the base film and is connected to an external compressed air source through a hose for blowing away the floating dust on the back of the base film. The surface of the arc-shaped collection tank 26 is provided with a dust scraping groove 260. One end of the arc-shaped sealing cover plate 27 is provided with scraper strips 270 at intervals. The scraper strips 270 are slidably connected inside the dust scraping groove 260. Each scraper strip 270 is slidably connected to the inside of a corresponding dust scraping groove 260. One end of the arc-shaped collection tank 26 is provided with a dust removal port 261. The dust removal port 261 is connected to an external industrial vacuum cleaner through a pipeline controlled by a solenoid valve, which can periodically or continuously suck up the dust accumulated in the tank.

[0023] A drive motor 14 is provided at one end of the wall panel 11. The output end of the drive motor 14 is connected to a take-up shaft 31 for winding the base film through a chain transmission mechanism. A synchronous belt 33 is sleeved at one end of the take-up shaft 31. A traction roller 32 is provided at one end of the synchronous belt 33. The traction roller 32 is rotatably connected to the lower part of the inner cavity of the wall panel 11. A rotating shaft 36 is provided at the lower part of the other end of the wall panel 11. The bottom of the adjusting plate 35 is fixedly connected to one end of the rotating shaft 36 and faces the front of the base film on the take-up shaft 31. The rotating shaft 36 is used to support the swinging action of the adjusting component 3. The traction roller 32 is rotatably connected to the lower part of the inner cavity of the wall panel 11 to assist in traction of the base film and prevent slack or deviation during the winding process. The electrostatic dust removal head 37 mainly undertakes the function of electrostatic neutralization and particle removal. The final collection and treatment of dust is usually completed by the matching external negative pressure dust collection system.

[0024] The arc-shaped sealing cover 27 can slide axially and rotate 180 degrees relative to the arc-shaped collection groove 26, ultimately making the openings of the arc-shaped collection groove 26 and the arc-shaped sealing cover 27 face each other, forming a complete cylindrical cavity. One end of the arc-shaped sealing cover 27 is provided with a sealing magnetic strip 271 for sealing after the two are joined. When the two are closed, the magnetic strip 271 achieves a seal. The electrostatic dust removal head 37 is connected to the wall plate 11 through the second drive cylinder 34. The extension and retraction of the second drive cylinder 34 is controlled by... The winding diameter detection signal is used to dynamically adjust the distance between the electrostatic dust removal head 37 and the surface of the base film wound by the winding shaft 31 as the base film roll diameter changes, and maintain it within a preset range. In cleaning mode, the arc-shaped sealing cover 27 slides axially, and the scraper 270 scrapes off the dust film attached to the inner wall of the arc-shaped collection groove 26. As the openings of the arc-shaped collection groove 26 and the arc-shaped sealing cover 27 face each other, they together form a complete cylindrical cavity. The scraped dust film is discharged from the dust removal port 261 with the suction airflow.

[0025] The working principle of this invention is as follows: During the base film winding process, the base film passes sequentially through the conveying roller 12 and the guide roller 13, then around the traction roller 32 and finally wound onto the winding shaft 31. The drive motor 14 drives the winding shaft 31 to rotate via chain transmission, and simultaneously drives the traction roller 32 to rotate synchronously via the synchronous belt 33, ensuring that the base film is conveyed forward with constant tension. On the back side of the base film, the dust removal component 2 works: the first drive cylinder 25 drives the crossbar 22 to move back and forth along the width direction of the base film, and the nozzle 240 on the fixing member 24 blows away the floating dust on the back side of the base film. The dust falls into the arc-shaped collection groove 26 below, and the arc-shaped collection groove 26 collects the dust. The trough 26 is connected to an external industrial vacuum cleaner through the dust removal port 261. When a thick dust film accumulates on the inner wall of the arc-shaped collection trough 26, the operator or automatic mechanism drives the arc-shaped sealing cover 27 to slide axially. The scraper 270 scrapes off the dust film on the inner wall. After scraping, the arc-shaped sealing cover 27 can be rotated 180 degrees and closed with the arc-shaped collection trough 26 to form a sealed cylindrical cavity. The scraper 270 scrapes off the dust film attached to the inner wall of the arc-shaped collection trough 26. As the openings of the arc-shaped collection trough 26 and the arc-shaped sealing cover 27 face each other, they together form a complete cylindrical cavity. The scraped dust film is discharged from the dust removal port 261 with the suction airflow. When removing dust from the front side of the base film, the electrostatic dust removal head 37 in the adjusting assembly 3 swings around the rotating shaft 36 under the drive of the second driving cylinder 34. A winding diameter detection sensor, such as an ultrasonic sensor or encoder, is installed on the winding shaft 31. When the base film roll diameter is detected to be gradually increasing, the control system controls the second driving cylinder 34 to retract, causing the adjusting plate 35 to move the electrostatic dust removal head 37 away from the winding shaft 31. When the roll diameter is small, the second driving cylinder 34 extends, bringing the electrostatic dust removal head 37 closer to the base film surface. Through this dynamic adjustment, the distance between the electrostatic dust removal head 37 and the front side of the base film is always maintained within the preset optimal dust removal range, thereby ensuring the consistency of the dust removal effect and avoiding electrostatic elimination failure or base film contact damage caused by distance changes.

[0026] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A base film winding device for photovoltaic backsheet production, comprising a frame assembly (1), characterized in that, One end of the frame assembly (1) is provided with a dust removal assembly (2) for removing dust from the back of the base film, and the other end of the frame assembly (1) is provided with an adjustment assembly (3) for adjusting the distance between the frame assembly (1) and the base film. The frame assembly (1) includes a wall panel (11), one end of which is provided with a conveying roller (12), and the bottom end of the wall panel (11) is rotatably connected to a rotating shaft (36). The dust removal assembly (2) includes a crossbar (22) and an arc-shaped collection groove (26). The surface of the crossbar (22) is provided with fixed parts (24) for dust removal at equal intervals. The arc-shaped collection groove (26) is slidably connected to an arc-shaped sealing cover plate (27) for scraping the dust film on the inner wall of the arc-shaped collection groove (26). The adjustment component (3) includes a second drive cylinder (34), and an adjustment plate (35) is provided at the output end of the second drive cylinder (34). One end of the adjustment plate (35) is provided with an electrostatic dust removal head (37) for removing dust from the front side of the base film.

2. The base film winding device for photovoltaic backsheet production as described in claim 1, characterized in that, A guide roller (13) for guiding is provided below the conveying roller (12), and the arc-shaped collection groove (26) is arranged parallel to the guide roller (13).

3. The base film winding device for photovoltaic backsheet production as described in claim 1, characterized in that, The wall panel (11) is symmetrically provided with brackets (21) at both ends, and a slider (23) is slidably connected to the surface of the bracket (21), and the crossbar (22) is fixedly connected to the top of the slider (23).

4. The base film winding device for photovoltaic backsheet production as described in claim 3, characterized in that, The wall panel (11) is symmetrically provided with a first driving cylinder (25) for driving the crossbar (22) to move. The output end of the first driving cylinder (25) is movably connected to both ends of the crossbar (22).

5. The base film winding device for photovoltaic backsheet production as described in claim 4, characterized in that, The top of the crossbar (22) is provided with a groove (220), and the fixing member (24) is movably connected to the top of the crossbar (22) through the groove (220). One end of the fixing member (24) is provided with a mouthpiece (240).

6. The base film winding device for photovoltaic backsheet production as described in claim 1, characterized in that, The surface of the arc-shaped collection trough (26) is provided with a scraping groove (260), and a scraper (270) is provided at one end of the arc-shaped sealing cover plate (27). The scraper (270) is slidably connected inside the scraping groove (260). A dust removal port (261) is provided at one end of the arc-shaped collection trough (26), and the dust removal port (261) is connected to an external industrial vacuum cleaner through a pipeline controlled by a solenoid valve.

7. The base film winding device for photovoltaic backsheet production as described in claim 4, characterized in that, One end of the wall panel (11) is provided with a drive motor (14), and the output end of the drive motor (14) is connected to a winding shaft (31) for winding the base film through a chain transmission mechanism. One end of the winding shaft (31) is sleeved with a synchronous belt (33), and one end of the synchronous belt (33) is provided with a traction roller (32). The traction roller (32) is rotatably connected to the lower part of the inner cavity of the wall panel (11).

8. The base film winding device for photovoltaic backsheet production as described in claim 7, characterized in that, A pivot (36) is provided at the lower end of the other end of the wall panel (11), and the bottom of the adjustment plate (35) is fixedly connected to one end of the pivot (36).

9. A base film winding device for photovoltaic backsheet production as described in claim 6, characterized in that, The arc-shaped sealing cover (27) can slide axially and rotate 180 degrees relative to the arc-shaped collecting groove (26), so that the openings of the arc-shaped collecting groove (26) and the arc-shaped sealing cover (27) are opposite each other, forming a complete cylindrical cavity. One end of the arc-shaped sealing cover (27) is provided with a sealing magnetic strip (271) for use after the connection.

10. A base film winding device for photovoltaic backsheet production as described in claim 1, characterized in that, The electrostatic dust removal head (37) is connected to the wall panel (11) via the second drive cylinder (34). The extension and retraction of the second drive cylinder (34) is controlled by the winding diameter detection signal, which is used to dynamically adjust the distance between the electrostatic dust removal head (37) and the base film surface wound by the winding shaft (31) as the base film roll diameter changes, and maintain it within a preset range.

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