Glue supply apparatus for photovoltaic cell encapsulation

Abstract

The application discloses a glue supply equipment for photovoltaic cell packaging, a glue applying sleeve is sealingly connected to the lower end of a cylinder sleeve, the lower end of the glue applying sleeve with a sealing plate is sealingly connected to a glue suction cylinder, the lower end of the glue suction cylinder is embedded into a glue inlet through hole on a pressing disc, a lower nut is threadedly connected to the outer wall of the lower end of the cylinder sleeve, the lower nut is sleeved on the outside of the glue applying sleeve and sealingly connected to the outer wall of the glue applying sleeve, the lower end of an upper connecting shaft is connected to a lower connecting shaft through a connecting rod, the lower end of the vertically extending lower connecting shaft passes through the glue applying sleeve and is installed with a glue scraping spoon, a glue scraping sealing piece is arranged above the glue scraping spoon, the glue scraping sealing piece comprises a lower annular part, an upper annular part with an outer diameter smaller than the inner diameter of the lower annular part and a connecting rib part, the concentrically arranged lower annular part and the upper annular part are connected through two symmetrically arranged connecting rib parts. The application can avoid the situation that the high glue pressure in the inner cavity of the cylinder sleeve caused by high viscosity of the glue liquid leads to unstable sealing performance and greatly shortened sealing service life.

Description

Technical Field

[0001] The present invention relates to the field of photovoltaic technology, and in particular to a glue supply device for photovoltaic cell packaging used for glue application in a photovoltaic processing production line. Background Art

[0002] Currently, the organic silicon encapsulation assembly for crystalline silicon solar modules primarily consists of an upper layer of glass, an upper layer of organic silicone, a cell string, a lower layer of organic silicone, and finally a lower layer of glass. Existing encapsulation technology primarily relies on a flow coating (spray coating) process. The adhesive application process is as follows: adhesive application to the front glass, cell string placement, adhesive application to the cell string, and finally glass bonding. Existing adhesive supply mechanisms used in solar module production often suffer from high pressure and flow rates, resulting in unstable adhesive output and impacting dispensing quality. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a glue supply device for photovoltaic cell packaging, which can realize the continuous outward supply of glue at a large flow rate to ensure the demand for glue usage on the photovoltaic production line, and can also avoid the high glue pressure in the cylinder liner cavity caused by the high viscosity of the glue liquid, resulting in unstable sealing performance and greatly shortened sealing service life.

[0004] The cam is secured to the upper edge of the cam and secured to the lower edge of the cam.

[0005] The lower end of the cylinder sleeve is sealed with a glue passing sleeve, and the lower end of the glue passing sleeve with a sealing plate at the upper end is sealed with a glue suction cylinder, and the lower end of the glue suction cylinder is embedded in the glue inlet through hole on the pressure plate, and a lower nut is connected to the outer wall of the lower end of the cylinder sleeve through a thread, and the lower nut is sleeved on the outer side of the glue passing sleeve and sealed with the outer wall of the glue passing sleeve, the lower end of the upper link shaft is connected to the lower link shaft through a connecting rod, the lower end of the vertically extending lower link shaft passes through the glue passing sleeve and is equipped with a glue scraper spoon, and a glue scraper seal is provided above the glue scraper spoon, and the glue scraper seal includes a lower annular portion, an outer diameter smaller than the inner diameter of the lower annular portion, and a An upper annular portion and a connecting rib portion, the concentrically arranged lower annular portion and the upper annular portion are connected by two symmetrically arranged connecting rib portions, the upper annular portion can be slidably mounted on the lower link shaft, and a stop protrusion extending outward is provided on the lower link shaft and above the upper annular portion. When the scraper seal slides to the bottom along the lower link shaft, the lower end inner wall of the lower annular portion is in sealing contact with the upper end outer wall of the scraper spoon. The inner wall of the upper end of the glue suction tube is an inner conical surface open downward. When the scraper seal moves to the top along the lower link shaft, the upper end outer wall of the lower annular portion (151) is in sealing contact with the lower part of the inner conical surface.

[0006] The cam is provided with a movable part which can move in the vertical direction in the said glue passing sleeve and below the sealing plate. The sealing sleeve is mounted on the lower connecting shaft. The lower part of the movable part can be sealed with the upper end of the glue sucking cylinder, so as to form a glue feeding chamber between the glue passing sleeve, the glue sucking cylinder and the movable part. The outer side of the said connecting rod is provided with a movable sleeve. A stop part is provided above the movable sleeve which can move in the vertical direction. The outer surface of the lower part of the movable sleeve is sealed with the inner wall of the cylinder sleeve, so as to form a glue feeding chamber between the said movable sleeve and the glue sucking cylinder. A glue storage chamber is formed between the lower part and the sealing plate of the glue passing sleeve. The lower part of the connecting rod has a radially outward protrusion. The lower end of the movable sleeve can be sealed with the upper surface of the protrusion, thereby forming a glue discharge chamber between the movable sleeve and the connecting rod. The glue feed chamber and the glue storage chamber are connected through a number of glue passing holes opened on the sealing plate. A glue discharge hole connected to the glue discharge chamber is opened on the side wall of the upper part of the movable sleeve, and a glue discharge flow channel is provided between the glue discharge hole and the glue outlet on the cylinder sleeve.

[0007] The further improved scheme in the above technical scheme is as follows:

[0008] 1. In the above embodiment, the inner wall of the lower end of the lower nut has a first flange portion extending radially inward, and the outer wall of the upper end of the glue suction tube has a second flange portion extending radially outward. The lower surface of the second flange portion overlaps the upper surface of the first flange portion, and the outer surface of the second flange portion is sealed to the inner wall of the lower nut.

[0009] 3. In the above scheme, a connecting sleeve is provided between the lower nut and the pressure plate and located on the outside of the glue suction tube. The lower end of the connecting sleeve is embedded in a flange ring and sealed with the inner wall of the flange ring. The flange ring is connected to the upper surface of the pressure plate by bolts, and the inner wall of the connecting sleeve is sealed with the outer wall of the glue suction tube.

[0010] 4. In the above solution, a sealing gasket is provided between the flange ring and the upper surface of the pressure plate.

[0011] 4. In the above solution, the stop portion is arranged at the lower part of the upper link shaft.

[0012] 5. In the above scheme, a retaining ring is provided between the rubber sleeve and the rubber suction tube, the upper surface of the retaining ring is sealed to the lower end surface of the rubber sleeve via an O-ring, and the lower surface of the retaining ring is sealed to the upper end surface of the rubber suction tube via an O-ring. An inner chamfer is provided on the upper end of the retaining ring, and the inner chamfer surface is in sealing contact with the movable part.

[0013] 6. In the above solution, the lower surface of the movable plate and the upper surface of the pressure plate are connected by two vertical connecting rods symmetrically arranged on both sides of the cylinder sleeve, so that the pressure plate can move in the vertical direction with the movable plate.

[0014] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0015] The cam is secured to the upper edge of the cam and secured to the bottom edge of the cam, and the cam is secured to the bottom edge of the cam, with the cam being secured to the bottom edge of the cam. The upper and lower connecting shafts are connected to each other to drive the glue feeding chamber, the glue storage chamber and the glue outlet chamber to form a glue discharging chamber, and the glue feeding chamber and the glue storage chamber are connected by a plurality of glue passing holes provided on the sealing plate. A glue discharge hole connected to the glue discharge chamber is provided on the side wall of the upper part of the movable sleeve. A glue discharge flow channel is provided between the glue discharge hole and the glue outlet on the cylinder sleeve. The reciprocating movement of the upper and lower connecting shafts drives the staggered connection between the glue feeding chamber, the glue storage chamber and the glue discharge chamber, so that the glue is continuously supplied to the outside at a large flow rate to ensure the demand for glue consumption on the photovoltaic production line, and to ensure the stability of the output glue pressure and flow, thereby ensuring the quality of the final glue dispensing.

[0016] 2. The glue supply device for photovoltaic cell packaging of the present invention further has a glue scraping seal provided above the glue scraping spoon. The glue scraping seal includes a lower annular portion, an upper annular portion having an outer diameter smaller than an inner diameter of the lower annular portion, and a connecting rib portion. The concentrically arranged lower annular portion and the upper annular portion are connected by two symmetrically arranged connecting rib portions. The upper annular portion is slidably mounted on the lower link shaft. A stop protrusion extending outward is provided on the lower link shaft and above the upper annular portion. When the glue scraping seal slides to the bottom along the lower link shaft, The inner wall of the lower end of the lower circular portion is in sealing contact with the outer wall of the upper end of the scraper spoon, and the inner wall of the upper end of the glue suction tube is an inner conical surface open downward. When the scraper seal moves to the top along with the lower connecting shaft, the outer wall of the upper end of the lower circular portion is in sealing contact with the lower part of the inner conical surface, which can provide uniform and stable pressure for the glue liquid to push the movable part into the glue storage chamber when the scraper spoon moves upward, and can also compress the space in the glue suction tube when the scraper spoon moves downward, maintaining the upward flow trend of the glue liquid, thereby ensuring continuous and stable glue supply.

[0017] 3. The glue supply device for photovoltaic cell packaging of the present invention has an inner flange portion radially inwardly provided on the inner wall of the cylinder sleeve and above the glue outlet, and an upper metal ring, a lower metal ring and a plurality of first sealing rings and second sealing rings arranged vertically and staggered between the upper metal ring and the lower metal ring are provided on the outer side of the upper link shaft and above the inner flange portion, and the upper metal ring, the first sealing ring and the second sealing ring are each provided with a V-shaped groove extending in the circumferential direction on the lower surface facing the inner cavity of the cylinder sleeve, and the upper end surfaces of the first sealing ring, the second sealing ring and the lower metal ring are each capable of being engaged with the upper end surfaces thereof. The V-groove cooperates with the V-shaped inclined surface, and a clamping nut is connected to the inner wall of the upper end of the cylinder sleeve through a threaded connection. The lower end face of the clamping nut is squeezed into contact with the upper surface of the upper metal ring and the lower surface of the lower metal ring is squeezed into contact with the upper surface of the inner flange. On the basis of continuously outputting the high-viscosity glue from the cylinder body through the glue outlet on the cylinder sleeve through the pressure plate, the stability of the seal at the upper end of the glue outlet can be always maintained during the long-term reciprocating movement of the upper connecting shaft, avoiding the situation where the high glue pressure in the inner cavity of the cylinder sleeve caused by the high viscosity of the glue liquid leads to unstable sealing performance and greatly shortened sealing service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Attachment Figure 1 This is a schematic diagram of the overall structure of the glue supply equipment for photovoltaic cell packaging of the present invention;

[0019] Attachment Figure 2 A schematic diagram of the partial structure of the glue supply equipment for photovoltaic cell packaging of the present invention;

[0020] Attachment Figure 3 For attachment Figure 2 Schematic diagram of the cross section along AA;

[0021] Attachment Figure 4 For attachment Figure 3 A magnified schematic diagram of point B in the middle;

[0022] Attachment Figure 5 For attachment Figure 3 Enlarged schematic diagram of point C in the middle;

[0023] Attachment Figure 6 For attachment Figure 3 The enlarged schematic diagram of point D in the middle;

[0024] Attachment Figure 7 This is a schematic structural diagram of a scraper seal for a glue supply device for photovoltaic cell packaging according to the present invention;

[0025] Attachment Figure 8 A schematic diagram of the extended state of the piston rod of the glue supply device for photovoltaic cell packaging of the present invention;

[0026] Attachment Figure 9 For attachment Figure 8Schematic cross-section along EE;

[0027] Attachment Figure 10 For attachment Figure 9 Enlarged schematic diagram of point F in the middle.

[0028] In the above drawings: 1. Cylinder; 101. Main body; 102. Piston rod; 2. Cylinder sleeve; 3. Pressure plate; 301. Glue inlet hole; 4. Upper connecting shaft; 41. Stopper; 51. Round nut; 52. Fixing plate; 53. Positioning column; 54. Support plate; 6. Glue outlet; 7. Inner flange; 81. Upper metal ring; 82. Lower metal ring; 83. First sealing ring; 84. Second sealing ring; 85. V-groove; 9. Pressing nut; 91. Gap layer; 92. Spacer layer; 93. Extension; 94. Wrench groove; 10. Retaining ring; 11. Lower nut; 111. First flange; 12. Connecting sleeve; 13. Flange ring; 14. Sealing gasket; 15. Glue scraper seal; 151. Lower annular portion; 152. Upper annular portion; 153. Connecting rib portion; 16. Stop protrusion; 17. Glue feeding sleeve; 171. Closing plate; 172. Glue feeding through hole; 18. Glue suction cylinder; 181. Second flange portion; 19. Connecting rod; 191. Protrusion; 20. Lower connecting shaft; 21. Glue scraper spoon; 22. Movable part; 23. Movable sleeve; 231. Glue outlet hole; 241. Glue inlet chamber; 242. Glue storage chamber; 243. Glue outlet chamber; 25. Glue outlet channel; 100. Barrel; 200. Carrier plate; 300. Lifting cylinder; 400. Movable plate; 500. Vertical connecting rod. DETAILED DESCRIPTION

[0029] The present invention can be further understood through the specific embodiments given below, but they are not intended to limit the present invention.

[0030] Example 1: A glue supply device for photovoltaic cell packaging, comprising: a carrier plate 200 for placing a barrel 100, at least two lifting cylinders 300 vertically mounted on the upper surface of the carrier plate 200, a movable plate 400 connected between the upper ends of the piston rods of the lifting cylinders 300, and a pressure plate 3 connected to the movable plate 400 via at least two vertical connecting rods 500, wherein a vertically arranged cylinder 1 is mounted on the lower surface of the movable plate 400, a cylinder sleeve 2 is connected to the main body 101 of the cylinder 1, and the pressure plate 3 is arranged directly below the vertically extending cylinder sleeve 2. A vertically extending upper link shaft 4 is installed at the lower end of the piston rod 102 of the cylinder 1. The lower end of the upper link shaft 4 penetrates into the cylinder sleeve 2. The center of the pressure plate 3 for sealing connection with the inner side wall of the barrel 100 is provided with a glue inlet through hole 301 communicating with the inner cavity of the cylinder sleeve 2. A glue outlet 6 is provided on the side wall of the upper end of the cylinder sleeve 2. A sealing ring 8 is provided above the glue outlet 6 and between the inner wall of the cylinder sleeve 2 and the outer wall of the upper link shaft 4.

[0031] The lower end of the cylinder sleeve 2 is sealingly connected with a glue feeding sleeve 17, the lower end of the glue feeding sleeve 17 with a sealing plate 171 is sealingly connected with a glue suction cylinder 18, the lower end of the glue suction cylinder 18 is embedded in the glue feeding through hole 301 on the pressing plate 3, the lower end of the upper connecting shaft 4 is connected with a lower connecting shaft 20 through a connecting rod 19, the lower end of the vertically extending lower connecting shaft 20 passes through the glue feeding sleeve 17 and is installed with a glue scraping spoon 21, a glue scraping sealing member 15 is arranged above the glue scraping spoon 21, the glue scraping sealing member 15 comprises a lower annular part 151, an upper annular part 152 with an outer diameter smaller than the inner diameter of the lower annular part 151 and a connecting rib part 153, the concentrically arranged lower annular part 151 and the upper annular part 152 are connected through the two symmetrically arranged connecting rib parts 153, the upper annular part 152 is slidably sleeved on the lower connecting shaft 20, an outwardly extending stop protrusion 16 is arranged on the lower connecting shaft 20 and above the upper annular part 152, when the glue scraping sealing member 15 slides to the lowermost position along the lower connecting shaft 20, the lower end inner wall of the lower annular part 151 is sealingly connected with the upper end outer wall of the glue scraping spoon 21, the inner wall of the upper end of the glue suction cylinder 18 is an open downward inner conical surface, when the glue scraping sealing member 15 slides to the uppermost position along the lower connecting shaft 20, the upper end outer wall of the lower annular part 151 is sealingly connected with the lower part of the inner conical surface;

[0032] A movable member 22 which can move in the vertical direction is arranged in the glue feeding sleeve 17 and below the sealing plate 171, the lower part of the movable member 22 which is sealingly sleeved on the lower connecting shaft 20 can be sealingly connected with the upper end of the glue suction cylinder 18, so that a glue feeding chamber 241 is formed between the glue feeding sleeve 17, the glue suction cylinder 18 and the movable member 22, an active sleeve 23 is sleeved on the outer side of the connecting rod 19 and can move in the vertical direction, a stop part 41 is arranged above the active sleeve 23, the outer surface of the lower part of the active sleeve 23 is sealingly connected with the inner wall of the cylinder sleeve 2, so that a glue storage chamber 242 is formed between the lower part of the active sleeve 23 and the sealing plate 171 of the glue feeding sleeve 17, the lower part of the connecting rod 19 has a radially outward protrusion part 191, the lower end of the active sleeve 23 can be sealingly matched with the upper surface of the protrusion part 191, so that a glue discharging chamber 243 is formed between the active sleeve 23 and the connecting rod 19, the glue feeding chamber 241 and the glue storage chamber 242 are communicated through a plurality of glue feeding through holes 172 arranged on the sealing plate 171, a glue discharging hole 231 which communicates with the glue discharging chamber 243 is arranged on the side wall of the upper part of the active sleeve 23, and the glue discharging hole 231 and the glue discharging port 6 on the cylinder sleeve 2 have a glue discharging flow channel 25;

[0033] When the piston rod of the cylinder is in the elongated state, the glue scraping spoon at the lower end of the lower connecting shaft is below the glue liquid level in the glue feeding through hole. During the upward movement of the glue scraping spoon along with the lower connecting shaft, the upward movement of the glue scraping spoon pushes the movable part upward, causing the seal between the movable part and the glue suction cylinder to fail. The glue liquid enters the glue feeding chamber area from the gap between the movable part and the glue suction cylinder, and then enters the glue storage chamber through the glue passing through hole. In this process, the movable sleeve moves upward under the action of the protrusion on the connecting rod and maintains sealing between the protrusion. The volume of the glue storage chamber gradually increases until the piston rod of the cylinder switches to the contracted state.

[0034] The inner wall of the cylinder sleeve 2 is provided with an inner flange part 7 extending radially inward. Above the inner flange part 7 and between the cylinder sleeve 2 and the upper connecting shaft 4, an upper metal ring 81, a lower metal ring 82, and a plurality of first sealing rings 83 and second sealing rings 84 are arranged vertically and staggered between the upper metal ring 81 and the lower metal ring 82.

[0035] The lower surface of each of the upper metal ring 81, the first sealing ring 83, and the second sealing ring 84 is provided with a V-shaped groove 85 extending in the circumferential direction. The upper end surface of each of the first sealing ring 83, the second sealing ring 84, and the lower metal ring 82 is a V-shaped inclined surface that can cooperate with the V-shaped groove 85 above it. The inner wall of the upper end of the cylinder sleeve 2 is threadedly connected to a compression nut 9. The lower end surface of the compression nut 9 is in extrusion contact with the upper surface of the upper metal ring 81, and the lower surface of the lower metal ring 82 is in extrusion contact with the upper surface of the inner flange part 7.

[0036] First, the lower metal ring is fitted on the upper connecting shaft with its lower surface overlapping the upper end surface of the inner flange part. Then, a plurality of first sealing rings and second sealing rings are fitted on the upper connecting shaft in sequence, with the V-shaped grooves on them facing downward toward the area where the glue pressure is generated. Finally, the upper metal ring is fitted, and the V-shaped grooves on each of the stacked rings cooperate with the V-shaped protrusions on the adjacent ring, improving the stability and integrity of the overall structure. The compression nut is then screwed into the cylinder sleeve, applying a downward extrusion force to the upper metal ring. The first sealing ring and the second sealing ring with V-shaped grooves expand radially outward after being extruded, making close contact with the upper connecting shaft and achieving sealing. The combination of the first sealing ring, the second sealing ring, the upper metal ring, and the lower metal ring improves the stability of the overall structure, the sealing performance, and the wear resistance. It can withstand high glue pressure for a long time while maintaining good sealing performance, prolonging its service life.

[0037] The inner wall of the first sealing ring 83 and the second sealing ring 84 is in interference fit with the outer wall of the upper connecting shaft 4.

[0038] A gap layer 91 is formed between the inner wall of the lower end of the above-mentioned clamping nut 9 and the outer wall of the upper link shaft 4, and a spacing layer 92 connected to the gap layer 91 is formed between the inner wall of the upper end of the clamping nut 9 and the outer wall of the upper link shaft 4, and the spacing layer 92 is filled with grease.

[0039] The stopper 41 is disposed at the lower portion of the upper link shaft 4 .

[0040] A retaining ring 10 is provided between the above-mentioned glue-passing sleeve 17 and the glue-absorbing tube 18. The upper surface of the retaining ring 10 is sealedly connected to the lower end surface of the glue-passing sleeve 17 by an O-ring, and the lower surface is sealedly connected to the upper end surface of the glue-absorbing tube 18 by an O-ring. The upper end of the retaining ring 10 is provided with an inner chamfer, and the inner chamfer surface is in sealing contact with the movable part 22.

[0041] A round nut 51 is mounted on the outer side of the upper end of the cylinder liner 2, and a fixing plate 52 is mounted below the round nut 51 threadedly connected to the cylinder liner 2 and on the outer side of the cylinder liner 2. The lower surface of the round nut 51 overlaps the upper surface of the fixing plate 52, and the fixing plate 52 is connected to the support plate 54 installed on the lower surface of the main body 101 of the cylinder 1 through at least two vertically arranged positioning columns 53.

[0042] The glue outlet 6 is located below the fixing plate 52 .

[0043] The barrel 100 is disposed between two lifting cylinders 300 .

[0044] The lower surface of the movable plate 400 and the upper surface of the pressure plate 3 are connected by two vertical connecting rods 500 symmetrically arranged on both sides of the cylinder sleeve 2, so that the pressure plate 3 can move in the vertical direction with the movable plate 400.

[0045] The inner walls of the upper metal ring 81 and the lower metal ring 82 are clearance-fitted with the outer wall of the upper link shaft 4 .

[0046] The first sealing ring 83 is a UPE sealing ring, the second sealing ring 84 is a polytetrafluoroethylene sealing ring, and the upper metal ring 81 and the lower metal ring 82 are both stainless steel rings.

[0047] The clamping nut 9 has an extension portion 93 extending upward from the upper end surface of the cylinder sleeve 2. The outer wall of the extension portion 93 is provided with a plurality of wrench grooves 94 arranged at intervals along the circumferential direction.

[0048] Example 2: A large flow glue supply system, comprising: a carrier plate 200 for placing a barrel 100, at least two lifting cylinders 300 vertically mounted on the upper surface of the carrier plate 200, a movable plate 400 connected between the upper ends of the piston rods of the lifting cylinders 300, and a pressure plate 3 connected to the movable plate 400 via at least two vertical connecting rods 500, wherein a vertically mounted cylinder 1 is mounted on the lower surface of the movable plate 400, a cylinder sleeve 2 is connected to the main body 101 of the cylinder 1, and the pressure plate 3 is arranged on the lower surface of the movable plate 400. Directly below the vertically extending cylinder sleeve 2, a vertically extending upper link shaft 4 is installed at the lower end of the piston rod 102 of the cylinder 1. The lower end of the upper link shaft 4 penetrates into the cylinder sleeve 2. The center of the pressure plate 3 for sealing connection with the inner side wall of the barrel 100 is provided with a glue inlet through hole 301 communicating with the inner cavity of the cylinder sleeve 2. The characteristic is that a glue outlet 6 is provided on the side wall of the upper end of the cylinder sleeve 2, and a sealing ring 8 is provided above the glue outlet 6 and between the inner wall of the cylinder sleeve 2 and the outer wall of the upper link shaft 4.

[0049] When in use, push the pressure plate that seals the outer wall and the inner wall of the barrel to below the liquid level in the barrel, so that the glue inlet hole on the pressure plate is filled with glue;

[0050] The lower end of the cylinder sleeve 2 is sealed with a glue passing sleeve 17, and the lower end of the glue passing sleeve 17 with a sealing plate 171 at the upper end is sealed with a glue suction cylinder 18. The lower end of the glue suction cylinder 18 is embedded in the glue inlet through hole 301 on the pressure plate 3. The lower end of the upper link shaft 4 is connected to a lower link shaft 20 through a connecting rod 19. The lower end of the vertically extending lower link shaft 20 passes through the glue passing sleeve 17 and is equipped with a glue scraping spoon 21. A glue scraping seal 15 is provided above the glue scraping spoon 21. The glue scraping seal 15 includes a lower annular portion 151, an upper annular portion 152 whose outer diameter is smaller than the inner diameter of the lower annular portion 151, and a connecting rib portion 153. The lower annular portion 152 is concentrically arranged. The ring portion 151 is connected to the upper annular portion 152 by two symmetrically arranged connecting ribs 153. The upper annular portion 152 can be slidably mounted on the lower link shaft 20. A stop protrusion 16 extending outward is provided on the lower link shaft 20 and above the upper annular portion 152. When the scraper seal 15 slides to the bottom along the lower link shaft 20, the lower inner wall of the lower annular portion 151 is in sealing contact with the upper outer wall of the scraper spoon 21. The inner wall of the upper end of the glue suction tube 18 is an inner conical surface open downward. When the scraper seal 15 slides to the top along the lower link shaft 20, the upper outer wall of the lower annular portion 151 is in sealing contact with the lower part of the inner conical surface.

[0051] An active member 22 vertically movable is arranged in the overgluing sleeve 17 and below the sealing plate 171. The lower part of the active member 22 sleeved on the lower connecting shaft 20 is sealingly connected with the upper end of the glue suction sleeve 18, so that a glue inlet chamber 241 is formed between the overgluing sleeve 17, the glue suction sleeve 18 and the active member 22. An active sleeve 23 vertically movable is sleeved on the outer side of the connecting rod 19. An upper stop portion 41 is arranged above the active sleeve 23. The outer surface of the lower part of the active sleeve 23 is sealingly connected with the inner wall of the cylinder sleeve 2, so that a glue storage chamber 242 is formed between the lower part of the active sleeve 23 and the sealing plate 171 of the overgluing sleeve 17. The lower part of the connecting rod 19 has a radially outward protruding portion 191. The lower end of the active sleeve 23 is sealingly connected with the upper surface of the protruding portion 191, so that a glue outlet chamber 243 is formed between the active sleeve 23 and the connecting rod 19. The glue inlet chamber 241 and the glue storage chamber 242 are connected through a plurality of overgluing through holes 172 formed on the sealing plate 171. A glue outlet hole 231 is formed on the side wall of the upper part of the active sleeve 23 and is connected with the glue outlet chamber 243. The glue outlet hole 231 and the glue outlet 6 on the cylinder sleeve 2 have a glue outlet flow channel 25.

[0052] The piston rod of the cylinder drives the coaxially arranged upper connecting shaft, connecting rod and lower connecting shaft to reciprocate vertically at a high frequency.

[0053] When the piston rod of the cylinder is converted from the retracted state to the extended state, the active sleeve is first lowered with the upper connecting shaft and connecting rod, so that the volume of the glue storage chamber is reduced. The glue liquid in the glue storage chamber is extruded and exerts an upward reaction force on the active sleeve, so that the active sleeve is raised and the seal between the active sleeve and the upper protruding portion of the connecting rod is lost. The glue liquid enters the glue outlet chamber from the gap between the active sleeve and the protruding portion, and then passes through the glue outlet hole and glue outlet flow channel and is outputted from the glue outlet on the cylinder sleeve.

[0054] The overgluing sleeve 17 and the glue suction sleeve 18 are provided with a stop ring 10. The upper surface of the stop ring 10 is sealingly connected with the lower end surface of the overgluing sleeve 17 through an O-ring. The lower surface of the stop ring 10 is sealingly connected with the upper end surface of the glue suction sleeve 18 through an O-ring. The upper end of the stop ring 10 is provided with an inner chamfer, and the chamfer surface is sealingly connected with the active member 22.

[0055] A circular nut 51 is sleeved on the outer side of the upper end of the cylinder sleeve 2. The lower part of the circular nut 51 sleeved on the outer side of the cylinder sleeve 2 is connected with a fixed plate 52. The lower surface of the circular nut 51 is overlapped with the upper surface of the fixed plate 52. The fixed plate 52 is connected with a support plate 54 mounted on the lower surface of the main body part 101 of the cylinder 1 through at least two vertically arranged positioning columns 53.

[0056] The upper surface of the raised portion 191 on the connecting rod 19 is a conical surface with an open lower end, and the lower end of the movable sleeve 23 is provided with an inner chamfered surface that can fit with the conical surface.

[0057] A lower nut 11 is threadedly connected to the outer wall of the lower end of the cylinder sleeve 2 . The lower nut 11 is sleeved on the outer side of the rubber sleeve 17 and is sealed with the outer wall of the rubber sleeve 17 .

[0058] The inner wall of the lower end of the above-mentioned lower nut 11 has a first flange portion 111 radially inward, and the outer wall of the upper end of the above-mentioned glue suction tube 18 has a second flange portion 181 radially outward. The lower surface of the second flange portion 181 overlaps and contacts the upper surface of the first flange portion 111, and the outer surface of the second flange portion 181 is sealed with the inner wall of the lower nut 11.

[0059] A connecting sleeve 12 is provided between the lower nut 11 and the pressure plate 3 and on the outside of the glue suction tube 18. The lower end of the connecting sleeve 12 is embedded in a flange ring 13 and is sealed with the inner wall of the flange ring 13. The flange ring 13 is connected to the upper surface of the pressure plate 3 by bolts, and the inner wall of the connecting sleeve 12 is sealed with the outer wall of the glue suction tube 18.

[0060] A sealing gasket 14 is provided between the flange ring 13 and the upper surface of the pressure plate 3 .

[0061] The upper portion of the glue inlet through hole 301 is cylindrical, and the lower portion is trumpet-shaped and open outward.

[0062] The working principle of the present invention is as follows:

[0063] During assembly, first put the lower metal ring on the upper link shaft and make its lower surface overlap with the upper end face of the inner flange part, then put multiple first sealing rings and second sealing rings on the upper link shaft in an alternating manner and make the V-grooves on them face downward to the area where glue pressure is generated, and finally put on the upper metal ring. The V-grooves on each ring body stacked in sequence match the V-shaped protrusions on the adjacent ring body to improve the stability and integrity of the overall structure, and then screw the clamping nut into the cylinder sleeve so that its lower end face applies a downward extrusion force to the upper metal ring. The first sealing ring and the second sealing ring with the V-groove are radially outward after being squeezed, and are in close contact with the upper link shaft to achieve sealing. The combination of the staggered first sealing ring, the second sealing ring and the upper metal ring and the lower metal ring can not only improve the stability of the overall structure, but also improve its sealing performance and wear resistance. It can withstand high glue pressure for a long time and maintain good sealing, thereby extending its service life.

[0064] When in use, push the pressure plate that seals the outer wall and the inner wall of the barrel to below the liquid level in the barrel, so that the glue inlet hole on the pressure plate is filled with glue;

[0065] The piston rod of the cylinder drives the coaxially arranged upper link shaft, connecting rod and lower link shaft to reciprocate in the vertical direction at a high frequency;

[0066] When the piston rod of the cylinder is in an extended state, the glue scraper spoon at the lower end of the lower connecting shaft is located below the glue liquid level in the glue inlet through hole. In the process of the glue scraper spoon moving upward with the lower connecting shaft, the glue liquid moving upward with the glue scraper spoon pushes the movable part to move upward, causing the seal between the movable part and the glue suction cylinder to fail. The glue enters the glue inlet chamber area through the gap between the movable part and the glue suction cylinder and then enters the glue storage chamber through the glue through hole. During this process, the movable sleeve moves upward under the action of the convex part on the connecting rod and maintains the seal between it and the convex part. The volume of the glue storage chamber gradually increases until the piston rod of the cylinder switches to a retracted state;

[0067] When the piston rod of the cylinder transitions from a contracted state to an extended state, the movable sleeve first moves downward along with the upper connecting shaft and the connecting rod, reducing the volume of the glue storage chamber. After the glue liquid in the glue storage chamber is squeezed, an upward reaction force is exerted on the movable sleeve, causing the movable sleeve to move upward, resulting in failure of the seal between the movable sleeve and the raised portion on the connecting rod. The glue liquid enters the glue discharge chamber area from the gap between the movable sleeve and the raised portion, and then passes through the glue discharge hole and the glue discharge channel and is output from the glue outlet on the cylinder sleeve.

[0068] The glue supply equipment used in the photovoltaic cell packaging described above drives the cross-connections between the glue inlet chamber, the glue storage chamber, and the glue outlet chamber through the reciprocating movement of the upper and lower link shafts, thereby achieving continuous glue supply at a large flow rate to ensure the glue dosage required on the photovoltaic production line. It can also ensure the stability of the output glue pressure and flow rate, thereby ensuring the quality of the final glue dispensing.

[0069] Furthermore, when the scraper spoon moves upward, it can provide uniform and stable pressure for the glue liquid to push the movable part into the glue storage chamber, and when the scraper spoon moves downward, it can compress the space in the glue suction cylinder to keep the glue liquid flowing upward, thereby ensuring continuous and stable glue supply;

[0070] In addition, on the basis of realizing the continuous output of the high-viscosity glue from the cylinder through the glue outlet on the cylinder liner by the pressure plate, the stability of the seal at the upper end of the glue outlet can be always maintained during the long-term reciprocating movement of the upper connecting shaft, thereby avoiding the high glue pressure in the inner cavity of the cylinder liner caused by the high viscosity of the glue, resulting in unstable sealing performance and greatly shortened sealing service life.

[0071] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made in accordance with the spirit of the present invention are intended to be covered by the scope of protection of the present invention.

Claims

1. A glue supply device for photovoltaic cell packaging, comprising: A carrier plate (200) for placing a barrel (100), at least two lifting cylinders (300) vertically mounted on the upper surface of the carrier plate (200), a movable plate (400) connected between the upper ends of the piston rods of the lifting cylinders (300), and a pressure plate (3) connected to the movable plate (400) via at least two vertical connecting rods (500), wherein a vertically mounted cylinder (1) is mounted on the lower surface of the movable plate (400), a cylinder sleeve (2) is connected to the main body (101) of the cylinder (1), and the pressure plate (3) is mounted on the vertically extending cylinder sleeve (2). Directly below the cylinder (1), a vertically extending upper link shaft (4) is installed at the lower end of the piston rod (102) of the cylinder (1), and the lower end of the upper link shaft (4) penetrates into the cylinder sleeve (2). The center of the pressure plate (3) for sealing connection with the inner side wall of the barrel (100) is provided with a glue inlet through hole (301) communicating with the inner cavity of the cylinder sleeve (2), characterized in that: a glue outlet (6) is provided on the side wall of the upper end of the cylinder sleeve (2), and a sealing ring (8) is provided above the glue outlet (6) and between the inner wall of the cylinder sleeve (2) and the outer wall of the upper link shaft (4); The lower end of the cylinder sleeve (2) is sealed with a glue passing sleeve (17), and the lower end of the glue passing sleeve (17) with a sealing plate (171) at the upper end is sealed with a glue suction cylinder (18). The lower end of the glue suction cylinder (18) is embedded in the glue inlet through hole (301) on the pressure plate (3). A lower nut (11) is connected to the outer wall of the lower end of the cylinder sleeve (2) through a thread. The lower nut (11) is sleeved on the outer side of the glue passing sleeve (17) and is sealed with the outer wall of the glue passing sleeve (17). The lower end of the upper link shaft (4) is connected to a lower link shaft (20) through a connecting rod (19). The lower end of the vertically extending lower link shaft (20) passes through the glue passing sleeve (17) and is equipped with a glue scraping spoon (21). A glue scraping seal (15) is provided above the glue scraping spoon (21). The glue scraping seal (15) includes a lower annular portion (151), an outer diameter smaller than the lower annular portion (152), and a lower ring portion (153). The upper annular portion (152) and the connecting rib portion (153) are concentrically connected to the inner diameter of the ring portion (151). The lower annular portion (151) and the upper annular portion (152) are connected by two symmetrically arranged connecting rib portions (153). The upper annular portion (152) is slidably mounted on the lower link shaft (20). A stop protrusion (16) extending outward is provided on the lower link shaft (20) and is located above the upper annular portion (152). When the scraper seal (15) moves to the bottom along with the lower link shaft (20), the lower inner wall of the lower annular portion (151) is in sealing contact with the upper outer wall of the scraper spoon (21), and the inner wall of the upper end of the glue suction cylinder (18) is an inner conical surface open downward. When the scraper seal (15) moves to the top along with the lower link shaft (20), the upper outer wall of the lower annular portion (151) is in sealing contact with the lower part of the inner conical surface; A movable part (22) movable in the vertical direction is provided inside the glue passing sleeve (17) and below the sealing plate (171). The lower part of the movable part (22) is sealedly mounted on the lower connecting shaft (20) and can be sealedly connected to the upper end of the glue sucking cylinder (18), thereby forming a glue feeding chamber (241) between the glue passing sleeve (17), the glue sucking cylinder (18) and the movable part (22). A movable sleeve (23) is mounted on the outer side of the connecting rod (19). A stopper (41) is provided above the movable sleeve (23) movable in the vertical direction. The outer surface of the lower part of the movable sleeve (23) is sealedly connected to the inner wall of the cylinder sleeve (2), thereby forming a glue feeding chamber (241) between the glue passing sleeve (17), the glue sucking cylinder (18) and the movable part (22). A glue storage chamber (242) is formed between the sealing plates (171), the lower part of the connecting rod (19) has a radially outward protrusion (191), the lower end of the movable sleeve (23) can be sealed with the upper surface of the protrusion (191), so that a glue discharge chamber (243) is formed between the movable sleeve (23) and the connecting rod (19), the glue feed chamber (241) and the glue storage chamber (242) are connected through a plurality of glue through holes (172) opened on the sealing plates (171), a glue discharge hole (231) connected to the glue discharge chamber (243) is opened on the side wall of the upper part of the movable sleeve (23), and a glue discharge flow channel (25) is provided between the glue discharge hole (231) and the glue outlet (6) on the cylinder sleeve (2).

2. The adhesive supply device for photovoltaic cell encapsulation according to claim 1, characterized in that: The inner wall of the lower end of the lower nut (11) has a first flange portion (111) extending radially inward, and the outer wall of the upper end of the rubber suction tube (18) has a second flange portion (181) extending radially outward. The lower surface of the second flange portion (181) is in overlapping contact with the upper surface of the first flange portion (111), and the outer surface of the second flange portion (181) is sealed to the inner wall of the lower nut (11).

3. The adhesive supply device for photovoltaic cell encapsulation according to claim 1, characterized in that: A connecting sleeve (12) is provided between the lower nut (11) and the pressure plate (3) and outside the rubber suction tube (18). The lower end of the connecting sleeve (12) is embedded in a flange ring (13) and is sealed with the inner wall of the flange ring (13). The flange ring (13) is connected to the upper surface of the pressure plate (3) by bolts. The inner wall of the connecting sleeve (12) is sealed with the outer wall of the rubber suction tube (18).

4. The adhesive supply device for photovoltaic cell encapsulation according to claim 3, characterized in that: A sealing gasket (14) is provided between the flange ring (13) and the upper surface of the pressure plate (3).

5. The adhesive supply device for photovoltaic cell encapsulation according to claim 1, characterized in that: The stopper (41) is arranged at the lower part of the upper link shaft (4).

6. The adhesive supply device for photovoltaic cell encapsulation according to claim 1, characterized in that: A retaining ring (10) is provided between the rubber-passing sleeve (17) and the rubber-sucking cylinder (18), and the upper surface of the retaining ring (10) is sealed with the lower end surface of the rubber-passing sleeve (17) via an O-ring, and the lower surface of the retaining ring (10) is sealed with the upper end surface of the rubber-sucking cylinder (18) via an O-ring. The upper end of the retaining ring (10) is provided with an inner chamfer, and the inner chamfer surface is in sealing contact with the movable part (22).

7. The adhesive supply device for photovoltaic cell encapsulation according to claim 1, characterized in that: The lower surface of the movable plate (400) and the upper surface of the pressure plate (3) are connected via two vertical connecting rods (500) symmetrically arranged on both sides of the cylinder sleeve (2), so that the pressure plate (3) can move in the vertical direction along with the movable plate (400).

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