Dispensing mechanism for sealing processing of photovoltaic module

Abstract

The dispensing mechanism comprises a dispensing valve provided with a glue inlet and a glue outlet and a dispensing head communicated with the glue outlet of the dispensing valve, and the dispensing valve comprises a driving cylinder body, a glue inlet block arranged below the driving cylinder body, a piston rod and a glue sealing head installed at the lower end of the piston rod; a glue inlet formed in the side wall of the glue inlet block communicates with a glue outlet formed in the lower surface of the glue inlet block through a glue inlet runner horizontally formed in the glue inlet block and a glue outlet runner vertically formed in the glue inlet block, and a sealing assembly between the piston rod and the glue inlet block comprises a shaft sleeve arranged on the outer side of the piston rod in a sleeving mode. The upper end of the shaft sleeve is embedded into the driving cylinder body, a spring plug ring is embedded into the upper end of the shaft sleeve, and the lower end of the shaft sleeve is hermetically connected with the upper surface of the glue feeding block through a spring plug ring. The dispensing continuity and efficiency can be improved, and the stability of the glue solution and the glue outlet flow in the long-time repeated glue opening and closing process can be guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of photovoltaic curtain wall processing, in particular to a dispensing mechanism for sealing processing of photovoltaic modules. BACKGROUND

[0002] Building integrated photovoltaics is an important application of solar cells, which combines the functions of solar cell power generation and building exterior walls, so that solar cell modules can both generate electricity and replace building materials. In the prior art, the conventional structure of a photovoltaic curtain wall module is to attach a front plate glass to the front side of a glass-based photovoltaic power generation chip, and to generate electricity through the photoelectric conversion effect of the photovoltaic power generation chip. In the assembly process of the photovoltaic module, the sealing performance of the module must be ensured, and in the prior art, the glass-based photovoltaic power generation chip and the front plate glass are generally fixed and sealed by double-sided adhesive tape and foam at the edges of the glass, which has poor sealing effect and requires a large amount of manpower. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a dispensing mechanism for sealing processing of photovoltaic modules, which can improve the continuity and efficiency of dispensing, and ensure the stability of glue liquid and glue flow during long-term repeated opening and closing of the glue process.

[0004] To solve the above technical problems, the technical solution adopted by the present application is: a dispensing mechanism for sealing processing of photovoltaic modules, comprising: a dispensing valve having a glue inlet and a glue outlet, and a dispensing head communicating with the glue outlet of the glue valve, the dispensing valve comprising a drive cylinder, a glue inlet block arranged below the drive cylinder, a piston rod movable in the vertical direction, and a glue sealing head mounted on the lower end of the piston rod, the glue inlet is arranged on the side wall of the glue inlet block, the glue outlet is arranged on the lower surface of the glue inlet block, the glue inlet and the glue outlet are communicated through a glue inlet channel horizontally arranged in the glue inlet block and a glue outlet channel vertically arranged in the glue inlet block, a sealing assembly is arranged between the piston rod and the glue inlet block and above the glue inlet channel, the sealing assembly further comprises: a shaft sleeve fitted on the outer side of the piston rod, the upper end of the shaft sleeve is embedded in the drive cylinder, and a piston ring is embedded in the upper end of the shaft sleeve, the lower end of the shaft sleeve is sealingly connected to the upper surface of the glue inlet block through a piston ring. The sealing part of the sealing head is located below the glue outlet, the connecting rod part of the sealing head extends upward into the glue outlet channel and is connected with the piston rod, when the sealing head moves to the high position with the piston rod, the sealing part thereof is in sealing cooperation with the glue outlet, when the sealing head moves to the low position with the piston rod, a glue outlet gap is formed between the sealing part and the glue outlet, the glue head vertically extending is rotatably installed on a base plate arranged horizontally below the glue valve inlet block through a bearing, a motor is arranged on the upper surface of the base plate and located at one side of the glue valve, a driven gear is sleeved on the outer side of the glue head and located below the base plate, a driving gear engaged with the driven gear is in transmission connection with the output shaft of the motor; The driving cylinder body is provided with a horizontal partition plate, so that the driving cavity in the driving cylinder body is divided into an upper cavity and a lower cavity, the upper end of the vertically arranged piston rod extends into the upper cavity through the horizontal partition plate and is in sealing cooperation with the horizontal partition plate, the outer side of the piston rod is sleeved with an upper piston disc located in the upper cavity and a lower piston disc located in the lower cavity, a spring in a compressed state is arranged between the lower surface of the lower piston disc and the inner wall of the bottom of the driving cylinder body, a first air pipe joint in communication with the upper cavity is arranged on the side wall of the driving cylinder body and located above the upper piston disc, a plurality of radial inward air inlet holes are arranged on the side wall of the piston rod and located above the upper piston disc, a first radial inward air outlet hole is arranged on the side wall of the piston rod and located between the horizontal partition plate and the lower piston disc, the air inlet holes and the first air outlet hole are in communication through an air path vertically arranged in the piston rod, a second air outlet hole is arranged on the upper surface of the horizontal partition plate, a second air pipe joint is arranged on the side wall of the driving cylinder body and located outside the horizontal partition plate, the second air pipe joint is in communication with the second air outlet hole through a pipeline arranged in the horizontal partition plate, and a third air outlet hole in communication with the lower cavity is arranged on the side wall of the lower part of the driving cylinder body.

[0005] The further improved scheme in the above technical solution is as follows: 1. In the above scheme, at least one oil storage groove is arranged on the side wall of the upper part of the shaft sleeve, and at least one oil inlet hole is arranged on the side wall of the lower part of the cylinder body 2, each oil inlet hole is in communication with one oil storage groove, and the oil storage groove can be supplemented with oil in real time without disassembly.

[0006] 2. In the above scheme, a plug is embedded and arranged on the end of each oil inlet hole away from the shaft sleeve.

[0007] 3. In the above scheme, a horizontal window hole is arranged on the driving cylinder body and located above the shaft sleeve.

[0008] 4. In the above scheme, a through hole is arranged on the piston rod.

[0009] 5. The scheme, the upper surface of the piston rod is centrally mounted with a pull rod, the upper end of the pull rod passes through the drive cylinder and is mounted with a up and down movable adjusting cap, the pull rod outside and between the adjusting cap and the drive cylinder is provided with a stop ring, when the pull rod moves to the lower end of the stroke with the piston rod, the upper end surface of the stop ring and the lower end surface of the adjusting cap are in contact.

[0010] 6. The scheme, the adjusting cap and the pull rod are connected through threads.

[0011] Due to the use of the above technical scheme, the present application has the following advantages compared with the prior art: 1、The dispensing mechanism for sealing processing of the photovoltaic module, the sealing part of the sealing head is located below the glue outlet, the connecting rod part of the sealing head extends upward into the glue outlet flow channel and is connected with the piston rod, when the sealing head moves to the high position with the piston rod, the sealing part is sealed with the glue outlet, when the sealing head moves to the low position with the piston rod, the glue outlet gap is formed between the sealing part and the glue outlet, the vertically extending dispensing head is rotatably installed on the base plate which is horizontally arranged below the glue inlet block of the dispensing valve, a motor is installed on the upper surface of the base plate and located on one side of the dispensing valve, a driven gear is sleeved on the outer side of the dispensing head and located below the base plate, the driving gear meshing with the driven gear is in transmission connection with the output shaft of the motor, by dispensing instead of adhesive tape, and while realizing the switching of continuous glue supply and stop glue supply to the dispensing head, the dispensing direction can be quickly switched through the rotation of the dispensing head, the continuity and efficiency of dispensing are improved.

[0012] 2. The dispensing mechanism for sealing photovoltaic modules of the present invention further includes a horizontal partition in the drive cylinder, thereby dividing the drive chamber in the drive cylinder into an upper chamber and a lower chamber. The upper end of the vertically arranged piston rod extends through the horizontal partition into the upper chamber and is sealed to the horizontal partition. An upper piston plate located in the upper chamber and a lower piston plate located in the lower chamber are respectively fitted on the outside of the piston rod. A spring in a compressed state is provided between the lower surface of the lower piston plate and the inner wall of the bottom of the drive cylinder. A first air pipe connector communicating with the upper chamber is installed on the side wall of the drive cylinder above the upper piston plate. Several radially inward air inlets are opened on the side wall of the piston rod above the upper piston plate. A radially inward first air outlet is opened on the side wall of the piston rod between the horizontal partition and the lower piston plate. The air inlets and the first air outlet are connected by an air passage vertically opened in the piston rod. A second air outlet is opened on the upper surface of the horizontal partition. A second air pipe connector is installed on the side wall of the moving cylinder, located outside the horizontal partition. This second air pipe connector is connected to a second air outlet through a pipe opened in the horizontal partition. A third air outlet is opened on the side wall of the lower part of the driving cylinder, which is connected to the lower cavity. The three air outlets are used to position the piston plate in the upper cavity and buffer the piston plate in the lower cavity. In the event of power failure or air failure, the piston rod with the piston plate installed can be driven by the spring to move the sealing head upward to block the glue outlet gap and prevent glue overflow and waste, thus avoiding product damage. At the same time, without increasing the air intake pressure, the force of the piston plate moving downward can be greatly increased to overcome the spring force, ensuring the stability of the glue outlet gap size when the piston rod moves the sealing head to the low position, thereby ensuring the stability and consistency of the glue flow. Furthermore, the combined action of the spring and the gas entering the lower cavity from the second air pipe connector can achieve rapid glue closing, thereby further ensuring the stability of the glue during long-term repeated opening and closing of the glue. Attached Figure Description

[0013] Appendix Figure 1 This is a schematic diagram of the adhesive dispensing mechanism for the sealing process of photovoltaic modules according to the present invention; Appendix Figure 2 This is a partial structural schematic diagram of the dispensing mechanism for sealing photovoltaic modules according to the present invention; Appendix Figure 3 A partial cross-sectional view of the dispensing mechanism for sealing photovoltaic modules according to the present invention. Figure 1 ; Appendix Figure 4 Appendix to this invention Figure 3 Enlarged view of point A in the middle; Appendix Figure 5 A partial cross-sectional view of the dispensing mechanism for sealing photovoltaic modules according to the present invention. Figure 2 ; Appendix Figure 6 Appendix to this invention Figure 5Enlarged view of point B in the middle; Appendix Figure 7 Appendix to this invention Figure 5 Enlarged diagram of point C in the middle.

[0014] In the attached diagrams: 1. Drive cylinder; 2. Inlet block; 3. Piston rod; 4. Sealing head; 41. Sealing part; 42. Connecting rod part; 51. Inlet; 52. Outlet; 61. Inlet channel; 62. Outlet channel; 7. Sealing assembly; 8. Horizontal partition; 91. Upper cavity; 92. Lower cavity; 10. Upper piston plate; 11. Lower piston plate; 12. Sealing ring; 131. First air pipe connector; 132. Second air pipe connector; 141. Air inlet; 142. Air passage; 143. First air outlet; 151. Second air outlet; 152. Pipeline; 153. Third air outlet; 16. 17. Dispensing head; 18. Bearing; 191. Base plate; 192. Driven gear; 20. Motor; 21. Support seat; 22. Coupling; 23. Rotating shaft; 241. Sensing plate; 242. Sensor; 25. Mounting block; 251. Mounting groove; 252. Glue inlet hole; 26. Rotary sealing ring; 27. Spring; 28. Protrusion; 29. ​​Through hole; 31. Dispensing port; 32. Snap ring; 33. Tie rod; 34. Adjusting cap; 35. Stop ring; 36. Bushing; 361. Oil reservoir; 362. Plug; 363. Oil inlet hole; 37. Plug ring; 39. Viewing window. Detailed Implementation

[0015] The present patent can be further understood through the specific embodiments given below, but they are not intended to limit the present patent.

[0016] Example 1: A dispensing mechanism for sealing the edge of a perovskite photovoltaic module by dispensing adhesive, comprising: a dispensing valve having an inlet 51 and an outlet 52, and a dispensing head 16 communicating with the outlet 52 of the dispensing valve. The dispensing valve includes a drive cylinder 1, an inlet block 2 disposed below the drive cylinder 1, a piston rod 3 movable in a vertical direction, and a sealing head 4 installed at the lower end of the piston rod 3. The inlet 51 is located on the side wall of the inlet block 2, and the outlet 52 is located on the lower surface of the inlet block 2. The inlet 51 and the outlet 52 are connected by an inlet channel 61 horizontally disposed within the inlet block 2 and an outlet channel 62 vertically disposed within the inlet block 2. The sealing part 41 of the sealing head 4 is located below the outlet 52. In this configuration, the connecting rod 42 of the sealing head 4 extends upward into the glue outlet channel 62 and connects with the piston rod 3. When the sealing head 4 moves to a high position with the piston rod 3, its sealing part 41 seals with the glue outlet 52. When the sealing head 4 moves to a low position with the piston rod 3, a glue outlet gap is formed between its sealing part 41 and the glue outlet 52. The vertically extending dispensing head 16 is rotatably mounted on a base plate 18 horizontally positioned below the glue inlet block 2 of the dispensing valve via a bearing 17. A motor 20 is mounted on the upper surface of the base plate 18 and on one side of the dispensing valve. A driven gear 191 is fitted on the outer side of the dispensing head 16 and below the base plate 18. The driving gear 192 meshing with the driven gear 191 is connected to the output shaft of the motor 20. The photovoltaic glass to be glued is placed horizontally below the glue dispensing head of the glue dispensing mechanism. Under the action of the three-axis drive mechanism, the glue dispensing head is first moved to a suitable height at a corner of the photovoltaic glass and the rectangular glue dispensing orifice of the glue dispensing head is parallel to one side of the photovoltaic glass. Then, the three-axis drive mechanism drives the glue dispensing head to move along the length of the other side of the photovoltaic glass and opens the glue dispensing gap of the glue dispensing valve at the same time, thereby realizing the glue dispensing operation on one edge of the photovoltaic glass. Next, the driven gear, which meshes with the driving gear, is driven by the rotation of the motor, causing the dispensing head to rotate 90°. During this process, the dispensing gap of the dispensing valve is closed.

[0017] The motor 20 is mounted on the upper surface of the substrate 18 via a support base 21. The lower end of the output shaft of the motor 20 is connected to a rotating shaft 23 via a coupling 22. The lower end of the rotating shaft 23 passes through the substrate 18 and is fitted with the drive gear 192.

[0018] The aforementioned rotating shaft 23 is rotatably connected to the substrate 18 via a bearing; a sensing element 241 that can rotate with it is mounted on the aforementioned rotating shaft 23, and a sensor 242 that cooperates with the aforementioned sensing element 241 is mounted on the aforementioned support base 21.

[0019] The diameter ratio of the driven gear 191 to the driving gear 192 is 2, and two sensors 242 are provided and spaced 180° apart in the circumferential direction.

[0020] A mounting block 25 is provided between the dispensing valve inlet block 2 and the substrate 18. The upper part of the dispensing head 16 is embedded in the mounting groove 251 opened on the lower surface of the mounting block 25 and is rotatably sealed with the inner wall of the mounting groove 251 by at least two rotating sealing rings 26. A glue inlet hole 252 is opened on the upper surface of the mounting block 25. The upper end of the glue inlet hole 252, which is connected to the mounting groove 251 at its lower end, is connected to the glue outlet 52. The sealing part 41 of the sealing head 4 is embedded in the glue inlet hole 252 and is in clearance fit with the inner wall of the glue inlet hole 252.

[0021] The aforementioned mounting block 25 and the dispensing valve inlet block 2 are sealed together by a sealing ring 12 located on the outside of the inlet hole 252.

[0022] The dispensing port 31 of the dispensing head 16 opposite to the dispensing valve inlet block 2 is rectangular.

[0023] A horizontal partition 8 is provided inside the aforementioned drive cylinder 1, thereby dividing the drive chamber inside the drive cylinder 1 into an upper chamber 91 and a lower chamber 92. The upper end of the vertically arranged piston rod 3 extends through the horizontal partition 8 into the upper chamber 91 and is sealed to the horizontal partition 8. An upper piston disc 10 located in the upper chamber 91 and a lower piston disc 11 located in the lower chamber 92 are respectively fitted on the outside of the piston rod 3. A spring 27 in a compressed state is provided between the lower surface of the lower piston disc 11 and the inner wall of the bottom of the drive cylinder 1. A first air pipe connector 131 communicating with the upper chamber 91 is installed on the side wall of the drive cylinder 1 above the upper piston disc 10. Several radially inward air inlets 141 are opened above the piston rod 3. A first radially inward air outlet 143 is opened on the side wall of the piston rod 3 between the horizontal partition 8 and the lower piston plate 11. The air inlets 141 and the first air outlet 143 are connected by an air passage 142 vertically opened in the piston rod 3. A second air outlet 151 is opened on the upper surface of the horizontal partition 8. A second air pipe connector 132 is installed on the side wall of the drive cylinder 1 outside the horizontal partition 8. The second air pipe connector 132 is connected to the second air outlet 151 through the pipe 152 opened in the horizontal partition 8. A third air outlet 153 connected to the lower cavity 92 is opened on the lower side wall of the drive cylinder 1. When dispensing is required, air enters the drive cylinder from the first air pipe connector. Part of the high-pressure gas acts on the upper surface of the upper piston plate, pushing it downward. Another part of the high-pressure gas passes through the air inlet, air passage and first air outlet in sequence, and then acts on the upper surface of the lower piston plate, pushing it downward. This causes the sealing head to move down to the lower position along with the piston rod connected to the piston plate, opening the dispensing gap. The double piston plate configuration can greatly increase the force of the piston plate moving downward without increasing the air inlet pressure, thus overcoming the spring force and ensuring the stability of the dispensing gap size when the piston rod drives the sealing head to the lower position, thereby ensuring the stability and consistency of the dispensing flow rate. When it is necessary to stop dispensing glue by reversing the dispensing head, air is introduced into the drive cylinder from the second air pipe connector. The high-pressure gas passes through the pipe in the horizontal partition and the second air outlet in sequence, and then acts on the lower surface of the upper piston plate to push the upper piston plate upward. At the same time, the force of the spring pushes the lower piston plate upward, so that the sealing head moves up to the high position with the piston rod connected to the piston plate to block the glue dispensing gap.

[0024] A sealing assembly 7 is provided between the piston rod 3 and the glue inlet block 2 and above the glue inlet channel 61; the sealing assembly 7 further includes: a bushing 36 fitted on the outside of the piston rod 3, the upper end of the bushing 36 being embedded in the drive cylinder 1 and a plug ring 37 being installed at the upper end of the bushing 36, and the lower end of the bushing 36 being sealed to the upper surface of the glue inlet block 2 through a plug ring 37.

[0025] At least one oil reservoir 361 is provided on the upper side wall of the aforementioned bushing 36, and at least one oil inlet hole 363 is provided on the lower side wall of the aforementioned cylinder body 2. Each of the aforementioned oil inlet holes 363 is connected to an oil reservoir 361, so that the oil reservoir can be replenished with grease in real time without disassembly. A plug 362 is embedded in the end of each of the aforementioned oil inlet holes 363 away from the bushing 36.

[0026] A horizontally penetrating viewing window 39 is provided on the aforementioned drive cylinder 1 and above the bushing 36.

[0027] The piston rod 3 is sealed to the bottom of the drive cylinder 1; a sealing ring 12 is provided between the upper piston plate 10 and the lower piston plate 11 and the inner wall of the upper cavity 91 and the lower cavity 92, respectively.

[0028] The upper piston disc 10 and the lower piston disc 11 are each fitted onto the piston rod 3 by two snap rings 32 and are sealed to the outer surface of the piston rod 3.

[0029] The inner wall at the bottom of the aforementioned drive cylinder 1 has a vertically upward protrusion 28, and the lower part of the aforementioned spring 27 is fitted onto the protrusion 28.

[0030] A through hole 29 is provided on the protrusion 28, and the piston rod 3 passes through the through hole 29 and is sealed with the inner wall of the through hole 29 by a sealing ring.

[0031] Example 2: A dispensing mechanism for sealing photovoltaic modules, comprising: a dispensing valve having an inlet 51 and an outlet 52, and a dispensing head 16 communicating with the outlet 52 of the dispensing valve. The dispensing valve includes a drive cylinder 1, an inlet block 2 disposed below the drive cylinder 1, a piston rod 3 movable in a vertical direction, and a sealing head 4 installed at the lower end of the piston rod 3. The inlet 51 is located on the side wall of the inlet block 2, and the outlet 52 is located on the lower surface of the inlet block 2. The inlet 51 and the outlet 52 are connected by an inlet channel 61 horizontally disposed within the inlet block 2 and an outlet channel 62 vertically disposed within the inlet block 2. The sealing part 41 of the sealing head 4 is located below the outlet 52. The connecting rod 42 extends upward into the glue dispensing channel 62 and connects with the piston rod 3. When the sealing head 4 moves to a high position with the piston rod 3, its sealing part 41 seals with the glue outlet 52. When the sealing head 4 moves to a low position with the piston rod 3, a glue dispensing gap is formed between its sealing part 41 and the glue outlet 52. The vertically extending dispensing head 16 is rotatably mounted on a base plate 18 horizontally disposed below the glue inlet block 2 of the dispensing valve via a bearing 17. A motor 20 is mounted on the upper surface of the base plate 18 and on one side of the dispensing valve. A driven gear 191 is fitted on the outer side of the dispensing head 16 and below the base plate 18. The driving gear 192 meshing with the driven gear 191 is connected to the output shaft of the motor 20. The dispensing head is driven by a three-axis drive mechanism to move along the length of the other side of the photovoltaic glass that is perpendicular to the side that has been dispensed. At the same time, the dispensing valve gap is opened to dispensing the glue at the other edge of the photovoltaic glass. By repeating this process, continuous dispensing of adhesive is applied to the edges of the photovoltaic glass to form an adhesive strip that replaces the tape used in existing technologies. This facilitates the bonding and fixing of the glass-based photovoltaic chip to the front glass, improving the continuity and efficiency of the dispensing process. When the processing equipment suddenly loses power or gas, the lower piston plate, under the action of the spring, drives the piston rod to move upward until the sealing head installed on the piston rod blocks the glue outlet gap, thus preventing glue from overflowing, causing waste and damaging the product.

[0032] The motor 20 is mounted on the upper surface of the substrate 18 via a support base 21. The lower end of the output shaft of the motor 20 is connected to a rotating shaft 23 via a coupling 22. The lower end of the rotating shaft 23 passes through the substrate 18 and is fitted with the drive gear 192. The rotating shaft 23 and the support base 21 are rotatably connected via a bearing.

[0033] A mounting block 25 is provided between the dispensing valve inlet block 2 and the substrate 18. The upper part of the dispensing head 16 is embedded in the mounting groove 251 opened on the lower surface of the mounting block 25 and is rotatably sealed with the inner wall of the mounting groove 251 by at least two rotating sealing rings 26. A glue inlet hole 252 is opened on the upper surface of the mounting block 25. The upper end of the glue inlet hole 252, which is connected to the mounting groove 251 at its lower end, is connected to the glue outlet 52. The sealing part 41 of the sealing head 4 is embedded in the glue inlet hole 252 and is in clearance fit with the inner wall of the glue inlet hole 252.

[0034] A through hole is provided on the piston rod 3; a pull rod 33 is installed in the center of the upper surface of the piston rod 3; the upper end of the pull rod 33 passes through the drive cylinder 1 and is fitted with an adjustable cap 34 that can move up and down; a stop ring 35 is provided on the outside of the pull rod 33 and between the adjustable cap 34 and the drive cylinder 1; when the pull rod 33 moves with the piston rod 3 to the lowest end of the stroke, the upper end face of the stop ring 35 abuts against the lower end face of the adjustable cap 34; the adjustable cap 34 and the pull rod 33 are connected by threads.

[0035] The dispensing method based on the above dispensing mechanism includes the following steps: Step 1: Install the dispensing mechanism onto the three-axis drive mechanism to perform dispensing operations on the edges of the rectangular photovoltaic glass. Step 2: Place the photovoltaic glass to be glued horizontally under the glue dispensing head of the glue dispensing mechanism. Under the action of the three-axis drive mechanism, first move the glue dispensing head to a suitable height at a corner of the photovoltaic glass and make the rectangular glue dispensing orifice of the glue dispensing head parallel to one side of the photovoltaic glass. Then, the three-axis drive mechanism drives the glue dispensing head to move along the length of the other side of the photovoltaic glass and opens the glue dispensing gap of the glue dispensing valve while moving, thereby realizing the glue dispensing operation on one edge of the photovoltaic glass. Specifically, when dispensing is required, air enters the drive cylinder from the first air pipe connector. Part of the high-pressure gas acts on the upper surface of the upper piston plate, pushing the upper piston plate downward. Another part of the high-pressure gas passes through the air inlet, air passage and first air outlet in sequence, and then acts on the upper surface of the lower piston plate, pushing the lower piston plate downward. This causes the sealing head to move down to the lower position along with the piston rod connected to the piston plate, and the dispensing gap opens. Step 3: Driven by the rotation of the motor, the driven gear meshing with the driving gear rotates, causing the dispensing head to rotate 90°. During this process, the dispensing gap of the dispensing valve is closed. Specifically, when it is necessary to close the dispensing gap of the dispensing valve to stop dispensing, air is introduced into the drive cylinder from the second air pipe joint. The high-pressure gas passes through the pipe in the horizontal partition and the second air outlet in sequence and acts on the lower surface of the upper piston plate to push the upper piston plate to move upward. At the same time, the force of the spring pushes the lower piston plate to move upward, so that the sealing head moves upward with the piston rod connected to the piston plate to the high position to block the dispensing gap. Step 4: Then, the three-axis drive mechanism drives the dispensing head to move along the length of the other side of the photovoltaic glass that is perpendicular to the side that has been dispensed. At the same time, the dispensing valve gap is opened to dispensing the other edge of the photovoltaic glass. This process is repeated to achieve continuous dispensing on all four edges of the photovoltaic glass, improving the continuity and efficiency of dispensing.

[0036] When the processing equipment suddenly loses power or gas, the lower piston plate drives the piston rod to move upward under the action of the spring until the sealing head installed on the piston rod blocks the glue outlet gap, thus preventing glue from overflowing and causing waste and damage to the product. When dispensing is required, air enters the drive cylinder from the first air pipe connector. Part of the high-pressure gas acts on the upper surface of the upper piston plate, pushing it downward. Another part of the high-pressure gas passes through the air inlet, air passage and first air outlet in sequence, and then acts on the upper surface of the lower piston plate, pushing it downward. This causes the sealing head to move down to the lower position along with the piston rod connected to the piston plate, opening the dispensing gap. The double piston plate configuration can greatly increase the force of the piston plate moving downward without increasing the air inlet pressure, thus overcoming the spring force and ensuring the stability of the dispensing gap size when the piston rod drives the sealing head to the lower position, thereby ensuring the stability and consistency of the dispensing flow rate. When it is necessary to stop dispensing glue by reversing the dispensing head, air is introduced into the drive cylinder from the second air pipe connector. The high-pressure gas passes through the pipe in the horizontal partition and the second air outlet in sequence, and then acts on the lower surface of the upper piston plate to push the upper piston plate upward. At the same time, the force of the spring pushes the lower piston plate upward, so that the sealing head moves up to the high position with the piston rod connected to the piston plate to block the glue dispensing gap.

[0037] When using the above-mentioned dispensing mechanism for photovoltaic module sealing, it can switch between continuous and stopped glue supply to the dispensing head, and can also quickly switch the dispensing direction by rotating the dispensing head, improving the continuity and efficiency of dispensing. Furthermore, the three air outlets are used to position the piston plate in the upper chamber and buffer the piston plate in the lower chamber. In the event of power failure or air failure, the piston rod with the piston plate installed can be driven by a spring to move the sealing head upward to block the glue outlet gap, preventing glue overflow and waste, and product damage. At the same time, without increasing the air intake pressure, the force of the piston plate moving downward can be greatly increased to overcome the spring force, ensuring the stability of the glue outlet gap size when the piston rod moves the sealing head to the low position, thereby ensuring the stability and consistency of the glue flow rate. In addition, the combined action of the spring and the gas entering the lower chamber from the second air pipe joint can achieve rapid glue closing, thereby further ensuring the stability of the glue during long-term repeated opening and closing of the glue.

[0038] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A dispensing mechanism for sealing photovoltaic modules, comprising: A dispensing valve is provided with an inlet (51) and an outlet (52), and a dispensing head (16) connected to the outlet (52) of the dispensing valve. The dispensing valve includes a drive cylinder (1), an inlet block (2) located below the drive cylinder (1), a piston rod (3) movable in the vertical direction, and a sealing head (4) installed at the lower end of the piston rod (3). The inlet (51) is located on the side wall of the inlet block (2), and the outlet (52) is located on the lower surface of the inlet block (2). The inlet (51) and the outlet (52) are connected by a horizontally opened inlet block (2). The glue flow channel (61) and the glue outlet flow channel (62) vertically opened in the glue inlet block (2) are connected. The feature is that a sealing assembly (7) is provided between the piston rod (3) and the glue inlet block (2) and above the glue inlet flow channel (61). The sealing assembly (7) further includes: a bushing (36) fitted on the outside of the piston rod (3). The upper end of the bushing (36) is embedded in the drive cylinder (1) and a plug ring (37) is embedded in the upper end of the bushing (36). The lower end of the bushing (36) is sealed to the upper surface of the glue inlet block (2) through a plug ring (37). The sealing part (41) of the sealing head (4) is located below the glue outlet (52). The connecting rod part (42) of the sealing head (4) extends upward into the glue outlet channel (62) and connects with the piston rod (3). When the sealing head (4) moves to a high position with the piston rod (3), its sealing part (41) seals with the glue outlet (52). When the sealing head (4) moves to a low position with the piston rod (3), a glue outlet gap is formed between its sealing part (41) and the glue outlet (52). The extended dispensing head (16) is rotatably mounted on a base plate (18) horizontally positioned below the dispensing valve inlet block (2) via a bearing (17). A motor (20) is mounted on the upper surface of the base plate (18) and on one side of the dispensing valve. A driven gear (191) is fitted on the outer side of the dispensing head (16) and below the base plate (18). The driving gear (192) meshing with the driven gear (191) is connected to the output shaft of the motor (20). A horizontal partition (8) is provided inside the drive cylinder (1), thereby dividing the drive chamber inside the drive cylinder (1) into an upper chamber (91) and a lower chamber (92). The upper end of the vertically arranged piston rod (3) extends through the horizontal partition (8) into the upper chamber (91) and is sealed to the horizontal partition (8). An upper piston plate (10) located in the upper chamber (91) and a lower piston plate (11) located in the lower chamber (92) are respectively fitted on the outside of the piston rod (3). A spring (27) in a compressed state is provided between the lower surface of the lower piston plate (11) and the inner wall of the bottom of the drive cylinder (1). A first air pipe connector (131) communicating with the upper chamber (91) is installed on the side wall of the drive cylinder (1) above the upper piston plate (10). A plurality of radially inward air inlets (141) are opened above the piston rod (3). A first radially inward air outlet (143) is opened on the side wall of the piston rod (3) between the horizontal partition (8) and the lower piston plate (11). The air inlets (141) and the first air outlet (143) are connected by an air passage (142) vertically opened in the piston rod (3). A second air outlet (151) is opened on the upper surface of the horizontal partition (8). A second air pipe connector (132) is installed on the side wall of the drive cylinder (1) outside the horizontal partition (8). The second air pipe connector (132) is connected to the second air outlet (151) through the pipe (152) opened in the horizontal partition (8). A third air outlet (153) connected to the lower cavity (92) is opened on the side wall of the lower part of the drive cylinder (1).

2. The dispensing mechanism for sealing photovoltaic modules according to claim 1, characterized in that: At least one oil reservoir (361) is provided on the upper side wall of the bushing (36), and at least one oil inlet (363) is provided on the lower side wall of the cylinder body 2. Each oil inlet (363) is connected to an oil reservoir (361) in a corresponding manner, so that the oil reservoir can be replenished with grease in real time without disassembly.

3. The dispensing mechanism for sealing photovoltaic modules according to claim 2, characterized in that: A plug (362) is embedded in the end of each oil inlet (363) away from the bushing (36).

4. The dispensing mechanism for sealing photovoltaic modules according to claim 1, characterized in that: A horizontally penetrating viewing window (39) is provided on the drive cylinder (1) and above the bushing (36).

5. The dispensing mechanism for sealing photovoltaic modules according to claim 1, characterized in that: A through hole is provided on the piston rod (3).

6. The dispensing mechanism for sealing photovoltaic modules according to claim 1, characterized in that: A pull rod (33) is installed in the center of the upper surface of the piston rod (3). The upper end of the pull rod (33) passes through the drive cylinder (1) and is fitted with an adjustable cap (34) that can move up and down. A stop ring (35) is provided on the outside of the pull rod (33) and between the adjustable cap (34) and the drive cylinder (1). When the pull rod (33) moves with the piston rod (3) to the lowest end of the stroke, the upper end face of the stop ring (35) and the lower end face of the adjustable cap (34) press against each other.

7. The dispensing mechanism for sealing photovoltaic modules according to claim 6, characterized in that: The adjusting cap (34) and the pull rod (33) are connected by threads.

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