Device and process for segmenting photovoltaic glass and EVA adhesive layer

Abstract

The invention belongs to the technical field of photovoltaic module recovery, and particularly relates to a device for segmenting photovoltaic glass and an EVA adhesive layer and a segmentation process. A photovoltaic glass heating area is used for heating the segmented photovoltaic glass and conveying the heated photovoltaic glass to be segmented to a photovoltaic glass segmentation area; the photovoltaic glass dividing area comprises an unpowered conveying roller, a pushing mechanism, a conveying belt, a dividing mechanism and a recycling box, and the pushing mechanism is used for moving the photovoltaic glass to be divided from the input end to the output end and conveying the divided photovoltaic glass to the conveying belt; an included angle is formed between a cutter of the cutting mechanism and the photovoltaic glass to be cut during cutting, and the included angle is 0-30 degrees. The photovoltaic glass cutting device has the function of heating photovoltaic glass to be cut, meanwhile, the angle of the cutter when the photovoltaic glass to be cut is cut is controlled, and the effect of removing an EVA adhesive layer is improved.

Description

Technical Field

[0001] This invention belongs to the field of photovoltaic module recycling technology, and particularly relates to a device and process for separating photovoltaic glass and EVA adhesive layer. Background Technology

[0002] A photovoltaic (PV) module is a power generation device that produces direct current (DC) electricity when exposed to sunlight. It consists of thin, solid-state photovoltaic cells made almost entirely of semiconductor materials (such as silicon). The photovoltaic industry has developed rapidly as a clean and renewable energy source. PV modules mainly consist of photovoltaic glass, EVA encapsulant, solar cells, backsheet, junction box, and frame. More than 90% of these materials are recyclable, possessing considerable recycling value and high economic profits. In particular, the photovoltaic glass in PV modules can be reused after cleaning following recycling.

[0003] However, after the solar cells are separated, there will be an EVA adhesive layer on the photovoltaic glass. If the photovoltaic glass is to be reused, the EVA adhesive layer needs to be removed.

[0004] Most existing devices for recycling tempered glass panels in photovoltaic modules remove the EVA adhesive layer adhering to the tempered glass panel directly using a scraper or blade. However, when using a scraper or blade to remove the EVA adhesive layer adhering to the tempered glass, it is easy to encounter the problem that the scraper or blade is not easy to remove the solid residue of the EVA adhesive layer.

[0005] In view of this, the present invention is hereby proposed. Summary of the Invention

[0006] To address the technical problems existing in the prior art, the present invention provides an apparatus and process for separating photovoltaic glass from EVA adhesive layer. The present invention has the function of heating the photovoltaic glass to be separated, and also has the function of controlling the angle of the cutter during the separation of the photovoltaic glass, thereby improving the effect of removing the EVA adhesive layer.

[0007] This invention includes the following technical solutions:

[0008] The first aspect of the present invention provides an apparatus for separating photovoltaic glass from EVA adhesive layers, comprising a photovoltaic glass heating zone and a photovoltaic glass separating zone. The photovoltaic glass heating zone is used to heat and separate the photovoltaic glass and transport the heated photovoltaic glass to be separated to the photovoltaic glass separating zone. The photovoltaic glass separating zone includes a non-powered conveying roller, a pushing mechanism, a conveyor belt, a separating mechanism, and a recycling bin. The input end of the non-powered conveying roller is connected to the output end of the photovoltaic glass heating zone. The recycling bin and the separating mechanism are sequentially arranged at the output end. The conveyor belt is arranged on one side of the separating mechanism. The pushing mechanism is used to move the photovoltaic glass to be separated from the input end to the output end and transport the separated photovoltaic glass onto the conveyor belt. The cutter of the separating mechanism forms an angle with the photovoltaic glass to be separated, the angle being 0° to 30°.

[0009] Furthermore, the dividing mechanism includes a cutter, an electric push rod, a lifting platform, a cutter holder, and an electric push rod support platform. The cutter holder is disposed on the lifting platform, and the cutter is rotatably connected to the cutter holder. The electric push rod support platform is disposed on the side of the lifting platform away from the unpowered conveying roller. The base of the electric push rod is rotatably disposed on the electric push rod support platform, and the push rod of the electric push rod is rotatably connected to the cutter.

[0010] Furthermore, the photovoltaic glass heating zone includes a conveying mechanism, a heat insulation cover, and a heating mechanism, wherein the heat insulation cover is mounted on the conveying mechanism, and the heating mechanism is disposed inside the heat insulation cover.

[0011] Furthermore, the heat insulation cover includes an upper heat insulation cover and side heat insulation plates. The side heat insulation plates located at both ends of the conveying mechanism include an upper fixed plate, a telescopic cylinder, and a lower telescopic plate. The upper fixed plate is provided with a telescopic cavity. The telescopic cylinder is disposed in the telescopic cavity and is connected to the lower telescopic plate. The outer surface of the lower telescopic plate and the inner surface of the telescopic cavity are adapted to each other.

[0012] Furthermore, the heating mechanism includes several infrared lamps; preferably, four infrared lamps are provided, and the four infrared lamps are arranged in a rectangular shape.

[0013] Furthermore, the heating mechanism also includes a fan structure, which includes a fan and a motor.

[0014] Furthermore, the air-carrying structure is positioned between four infrared lamps arranged in a rectangular pattern.

[0015] Furthermore, the pushing mechanism includes a lead screw slide rail, a slider, a lifting structure, a support plate, and contact blocks; the lead screw slide rail is disposed above the unpowered conveying roller, the lead screw slide rail is connected to the slider, the slider is connected to the lifting structure, the lifting structure is connected to the support plate, and the contact blocks are connected to the support plate; preferably, multiple contact blocks are provided, and the multiple contact blocks are evenly distributed on the support plate.

[0016] Furthermore, the contact block is made of rubber.

[0017] A second aspect of the present invention provides a process for separating photovoltaic glass from an EVA adhesive layer, comprising the apparatus described above, wherein the separation process includes the following steps:

[0018] The photovoltaic glass to be cut is transported to the photovoltaic glass heating zone;

[0019] The photovoltaic glass to be divided is heated and then transported to the photovoltaic glass dividing area. The cutter in the photovoltaic glass dividing area divides the photovoltaic glass to be divided at an angle of 0° to 30° with the photovoltaic glass to be divided to obtain the divided photovoltaic glass.

[0020] By adopting the above technical solution, the present invention has the following advantages:

[0021] 1. This invention has the function of heating the photovoltaic glass to be divided, and also has the function of controlling the angle of the cutter when dividing the photovoltaic glass, thereby improving the effect of removing the EVA adhesive layer.

[0022] 2. The structure of the present invention can realize the automatic segmentation of photovoltaic glass to be segmented, and the segmentation effect is good. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of a device for separating photovoltaic glass and EVA adhesive layer according to an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the segmented structure in an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the working state of the cutter in an embodiment of the present invention;

[0027] Figure 4This is a schematic diagram of the structure of the photovoltaic glass segmentation area in an embodiment of the present invention;

[0028] In the diagram: 10-Photovoltaic glass heating zone, 11-Conveying mechanism, 12-Insulation cover, 121-Upper insulation cover, 122-Side insulation plate, 1221-Upper fixing plate, 1222-Telescopic cylinder, 1223-Lower telescopic plate, 13-Heating mechanism, 131-Infrared lamp, 132-Air circulation structure, 1321-Fan, 1322-Motor, 20-Photovoltaic glass dividing zone, 21-Non-powered conveyor roller, 22-Pushing mechanism, 221-Screw guide rail, 222-Slider, 223-Lifting structure, 224-Support plate, 225-Contact block, 23-Conveyor belt, 24-Dividing mechanism, 241-Cutter, 242-Electric push rod, 243-Lifting platform, 244-Knife holder, 245-Electric push rod support platform, 25-Recycling box, 30-Rotating shaft, 40-Spring, 50-Photovoltaic glass to be divided. Detailed Implementation

[0029] The following description provides many different embodiments or examples for implementing various features of the invention. The elements and arrangements described in the specific examples below are only for concise expression of the invention and are merely examples, not intended to limit the invention.

[0030] In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] This embodiment provides a device for separating photovoltaic glass from EVA adhesive layers, such as... Figure 1As shown, the photovoltaic glass includes a photovoltaic glass heating zone 10 and a photovoltaic glass cutting zone 20. The photovoltaic glass heating zone 10 is used to heat and cut the photovoltaic glass and transport the heated photovoltaic glass to be cut 50 to the photovoltaic glass cutting zone 20. The photovoltaic glass cutting zone 20 includes a non-powered conveying roller 21, a pushing mechanism 22, a conveyor belt 23, a cutting mechanism 24, and a recycling bin 25. The input end of the non-powered conveying roller 21 is connected to the output end of the photovoltaic glass heating zone 10. The recycling bin 25 and the cutting mechanism 24 are arranged sequentially at the output end. The conveyor belt 23 is arranged on one side of the cutting mechanism 24. The pushing mechanism 22 is used to move the photovoltaic glass to be cut 50 from the input end to the output end and transport the cut photovoltaic glass onto the conveyor belt. When the cutting blade 241 of the cutting mechanism 24 cuts, it has an angle with the photovoltaic glass to be cut 50, and the angle is 0° to 30°.

[0033] like Figure 3 As shown, the cutter 241 has an angle θ with the photovoltaic glass 50 to be divided during operation, where θ is 0° to 30°.

[0034] The photovoltaic glass heating zone 10 of the present invention heats the photovoltaic glass 50 to be divided, which can soften the EVA adhesive layer and reduce its stickiness. The cutter 241 of the photovoltaic glass dividing zone 20 of the present invention removes the EVA adhesive film on the photovoltaic glass 50 to be divided, and the removed EVA adhesive film falls into the recycling bin 25.

[0035] In some embodiments, such as Figure 2 As shown, the dividing mechanism 24 includes a cutter 241, an electric push rod 242, a lifting platform 243, a cutter holder 244, and an electric push rod support platform 245. The cutter holder 244 is mounted on the lifting platform 243, and the cutter 241 is rotatably connected to the cutter holder 244. The electric push rod support platform 245 is mounted on the side of the lifting platform 243 away from the unpowered conveying roller 21. The base of the electric push rod 242 is rotatably mounted on the electric push rod support platform 245, and the push rod of the electric push rod 242 is rotatably connected to the cutter 241.

[0036] In some embodiments, the cutter 241 is connected to a support rod, which is rotatably connected to the cutter holder 244; a sliding block is provided on the support rod, and the push rod of the electric push rod 242 is rotatably connected to the sliding block.

[0037] It should be noted that, as Figure 2 As shown, the cutter 241 is rotatably connected to the cutter holder 244 via a rotating shaft 30, and the lifting platform 243 can be any structure with lifting and telescopic functions in the prior art.

[0038] In some embodiments, such as Figure 2As shown, the cutter 241 is connected to a spring 40, the spring 40 is connected to a support rod, and the support rod is rotatably connected to the cutter holder 244. A sliding block is fitted over the support rod, and the push rod of the electric push rod 242 is rotatably connected to the sliding block. The spring 40 acts as a buffer for the cutter 241, preventing damage and extending its service life.

[0039] The working principle of the cutting mechanism 24 is as follows: the cutting blade 241 is lifted by the lifting platform 243, and then the cutting blade 241 is rotated by the electric push rod 242.

[0040] In some embodiments, the photovoltaic glass heating zone 10 includes a conveying mechanism 11, a heat insulation cover 12, and a heating mechanism 13. The heat insulation cover 12 is placed on the conveying mechanism 11, and the heating mechanism 13 is disposed inside the heat insulation cover 12.

[0041] In some embodiments, the heat insulation cover 12 includes an upper heat insulation cover 121 and a side heat insulation plate 122. The side heat insulation plate 122 located at both ends of the conveying mechanism 11 includes an upper fixed plate 1221, a telescopic cylinder 1222 and a lower telescopic plate 1223. The upper fixed plate 1221 is provided with a telescopic cavity. The telescopic cylinder 1222 is disposed in the telescopic cavity. The telescopic cylinder 1222 is connected to the lower telescopic plate 1223. The outer surface of the lower telescopic plate 1223 is adapted to the inner surface of the telescopic cavity.

[0042] In some embodiments, the heating mechanism 13 includes a plurality of infrared lamps 131; preferably, four infrared lamps 131 are provided, and the four infrared lamps 131 are arranged in a rectangular shape.

[0043] In some embodiments, a temperature sensor is provided in the photovoltaic glass heating zone 10, which can be used to provide temperature feedback so as to control the heating temperature of the heating mechanism 13.

[0044] In some embodiments, the heating mechanism 13 further includes an air circulation structure 132, which includes a fan 1321 and a motor 1322. The air circulation structure 132 enables the heating temperature of the photovoltaic glass heating zone 10 to be more uniform, achieving the effect of rapid and uniform heating of the photovoltaic glass 50 to be divided.

[0045] In some embodiments, the air-flowing structure 132 is disposed between four infrared lamps 131 arranged in a rectangular shape. This has the advantage of improving efficiency.

[0046] In some embodiments, such as Figure 4As shown, the pushing mechanism 22 includes a lead screw slide rail 221, a slider 222, a lifting structure 223, a support plate 224, and contact blocks 225. The lead screw slide rail 221 is disposed above the unpowered conveying roller 21. The lead screw slide rail 221 is connected to the slider 222. The slider 222 is connected to the lifting structure 223. The lifting structure 223 is connected to the support plate 224. The contact blocks 225 are connected to the support plate 224. Preferably, multiple contact blocks 225 are provided, and the multiple contact blocks 225 are evenly distributed on the support plate 224. Multiple contact blocks 225 can increase the contact area and contact uniformity with the photovoltaic glass 50 to be divided, and improve the stability of the movement of the photovoltaic glass 50 to be divided.

[0047] The lead screw slide rail 221 is driven to rotate by the motor 1322, and the rotating lead screw slide rail 221 drives the slider 222 to move. In use, the lifting mechanism works by the contact block 225 contacting the photovoltaic glass 50 to be divided, and then driving the sliding movement, so that the contact block 225 drives the photovoltaic glass 50 to be divided to move. It should be noted that the pushing mechanism 22 not only moves the photovoltaic glass 50 to be divided, but also presses the photovoltaic glass 50 to be divided when the cutter 241 removes the EVA adhesive layer on the photovoltaic glass 50 to cooperate with the work of the cutter 241.

[0048] In some embodiments, the contact block 225 is made of rubber.

[0049] In some embodiments, such as Figure 4 As shown, the contact block 225 is provided with a rubber contact head.

[0050] The rubber material can prevent damage to the photovoltaic glass 50 to be divided during the process of moving and pressing it.

[0051] This embodiment also provides a process for separating photovoltaic glass from EVA adhesive layer, including the apparatus described above, the separation process including the following steps:

[0052] The photovoltaic glass 50 to be divided is transported to the photovoltaic glass heating zone 10;

[0053] The photovoltaic glass 50 to be divided is heated and then transported to the photovoltaic glass dividing area 20. The cutter 241 of the photovoltaic glass dividing area 20 divides the photovoltaic glass 50 to be divided at an angle of 0° to 30° with the photovoltaic glass 50 to be divided to obtain the divided photovoltaic glass.

[0054] In some embodiments, the heating temperature of the photovoltaic glass heating zone 10 is 0℃-300℃, and the photovoltaic glass 50 to be divided is heated to 180℃-200℃; this ensures that the EVA adhesive layer on the photovoltaic glass 50 to be divided is effectively removed.

[0055] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for separating photovoltaic glass and EVA adhesive layer, characterized in that, The system includes a photovoltaic glass heating zone (10) and a photovoltaic glass cutting zone (20). The photovoltaic glass heating zone (10) is used to heat and cut the photovoltaic glass and transport the heated photovoltaic glass (50) to be cut to the photovoltaic glass cutting zone (20). The photovoltaic glass cutting zone (20) includes a non-powered conveyor roller (21), a pushing mechanism (22), a conveyor belt (23), a cutting mechanism (24), and a recycling bin (25). The input end of the non-powered conveyor roller (21) is connected to the photovoltaic glass heating zone (10). The output end of the 0) is provided with the recycling bin (25) and the dividing mechanism (24) in sequence. The conveyor belt (23) is provided on one side of the dividing mechanism (24). The pushing mechanism (22) is used to move the photovoltaic glass (50) to be divided from the input end to the output end and to transport the divided photovoltaic glass onto the conveyor belt (23). When the cutter (241) of the dividing mechanism (24) divides the photovoltaic glass (50), it has an angle with the photovoltaic glass (50) to be divided, and the angle is 0° to 30°.

2. The apparatus for separating photovoltaic glass and EVA adhesive layer as described in claim 1, characterized in that, The dividing mechanism (24) includes a cutter (241), an electric push rod (242), a lifting platform (243), a cutter holder (244), and an electric push rod support platform (245). The cutter holder (244) is mounted on the lifting platform (243), and the cutter (241) is rotatably connected to the cutter holder (244). The electric push rod support platform (245) is mounted on the side of the lifting platform (243) away from the unpowered conveying roller (21). The base of the electric push rod (242) is rotatably mounted on the electric push rod support platform (245), and the push rod of the electric push rod (242) is rotatably connected to the cutter (241).

3. The apparatus for separating photovoltaic glass and EVA adhesive layer as described in claim 1, characterized in that, The photovoltaic glass heating zone (10) includes a conveying mechanism (11), a heat insulation cover (12), and a heating mechanism (13). The heat insulation cover (12) is placed on the conveying mechanism (11), and the heating mechanism (13) is arranged inside the heat insulation cover (12).

4. The device for separating photovoltaic glass and EVA adhesive layer as described in claim 3, characterized in that, The heat insulation cover (12) includes an upper heat insulation cover (121) and a side heat insulation plate (122). The side heat insulation plate (122) located at both ends of the conveying mechanism (11) includes an upper fixed plate (1221), a telescopic cylinder (1222) and a lower telescopic plate (1223). The upper fixed plate (1221) is provided with a telescopic cavity. The telescopic cylinder (1222) is disposed in the telescopic cavity. The telescopic cylinder (1222) is connected to the lower telescopic plate (1223). The outer surface of the lower telescopic plate (1223) is adapted to the inner surface of the telescopic cavity.

5. The apparatus for separating photovoltaic glass and EVA adhesive layer as described in claim 3, characterized in that, The heating mechanism (13) includes a plurality of infrared lamps (131); preferably, four infrared lamps (131) are provided, and the four infrared lamps (131) are arranged in a rectangular shape.

6. The apparatus for separating photovoltaic glass and EVA adhesive layer as described in claim 5, characterized in that, The heating mechanism (13) also includes a wind-operating structure (132), which includes a fan (1321) and a motor (1322).

7. The apparatus for separating photovoltaic glass and EVA adhesive layer as described in claim 6, characterized in that, The air-carrying structure (132) is located between four infrared lamps (131) arranged in a rectangular shape.

8. The apparatus for separating photovoltaic glass and EVA adhesive layer as described in claim 1, characterized in that, The pushing mechanism (22) includes a lead screw slide rail (221), a slider (222), a lifting structure (223), a support plate (224), and a contact block (225). The lead screw slide rail (221) is disposed above the unpowered conveying roller (21). The lead screw slide rail (221) is connected to the slider (222). The slider (222) is connected to the lifting structure (223). The lifting structure (223) is connected to the support plate (224). The contact block (225) is connected to the support plate (224). Preferably, multiple contact blocks (225) are provided, and the multiple contact blocks (225) are evenly distributed on the support plate (224).

9. The apparatus for separating photovoltaic glass and EVA adhesive layer as described in claim 8, characterized in that, The contact block (225) is made of rubber.

10. A process for separating photovoltaic glass from an EVA adhesive layer, characterized in that, Including the apparatus as described in any one of claims 1-9, the segmentation process includes the following steps: The photovoltaic glass to be divided (50) is transported to the photovoltaic glass heating zone (10); The photovoltaic glass (50) to be divided is heated and then transported to the photovoltaic glass dividing area (20). The cutter (241) of the photovoltaic glass dividing area (20) divides the photovoltaic glass (50) to be divided at an angle of 0° to 30° with the photovoltaic glass (50) to be divided to obtain the divided photovoltaic glass.

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