Metering switch valve for photovoltaic dispensing processing

Abstract

The utility model discloses a metering switch valve for photovoltaic dispensing processing, which comprises a dispensing valve and a metering pump, the dispensing valve is provided with a glue inlet and a glue outlet, the metering pump is respectively connected with a glue supply unit and the dispensing valve, and the dispensing valve further comprises a glue inlet block, a piston rod extending vertically and a glue sealing head mounted at the lower end of the piston rod. A glue outlet gap is formed between the plugging part of the glue sealing head and the glue outlet, a sealing block is arranged above the glue inlet block, a lower partition plate, a partition plate and an upper partition plate are sequentially arranged above the sealing block, a servo driving mechanism is installed on the upper surfaces of the lower partition plate and the upper partition plate, and at least two metal connecting columns are arranged between the partition plate and the upper partition plate; a plurality of metal fins are arranged on the outer side of each metal connecting column. On the basis of metering and pressurizing glue, high-precision glue dispensing operation is realized, and in the whole glue dispensing process, the speed and sensitivity of glue opening and closing are improved, so that the precision of the glue outlet amount and the consistency of multiple glue outlet amounts are improved, and effective blocking and timely heat dissipation are also realized.

Description

Technical Field

[0001] This utility model relates to the field of dispensing technology, and in particular to a metering switch valve for photovoltaic dispensing processing. Background Technology

[0002] Photovoltaic modules, also known as solar cell modules, are composed of a series of solar cells arranged in different arrays. They are facilities that convert solar energy into direct current (DC) energy using the photovoltaic effect of photovoltaic semiconductor materials. The semiconductor materials used for power generation mainly include monocrystalline silicon, polycrystalline silicon, amorphous silicon, and cadmium telluride. Solar photovoltaic panels are an indispensable component of solar photovoltaic systems. Existing photovoltaic panels, after being framed, require sealing to improve connection performance. During the dispensing process, the glue dispensing is generally controlled by a switching valve. The switching valve typically uses the on / off state of high-pressure gas to open and close the glue. However, this control is insensitive for high-viscosity glues, and when using hot melt glue, it is usually heated to ensure good flowability, but this heat negatively impacts the performance of the drive mechanism. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a metering switch valve for photovoltaic dispensing. This metering switch valve can achieve high-precision dispensing operation by metering and pressurizing the glue, improving the accuracy of the dispensing volume and the consistency of the dispensing volume in multiple dispensing processes, and effectively blocking and timely dissipating the heat carried by the glue.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a metering switch valve for photovoltaic dispensing processing, comprising: a dispensing valve having an inlet and an outlet, and a metering pump connected to a glue supply unit and the dispensing valve respectively. The inlet of the metering pump is connected to the glue supply unit, and the inlet of the dispensing valve is connected to the outlet of the metering pump. The dispensing valve further comprises: an inlet block, a vertically extending piston rod, and a sealing head installed at the lower end of the piston rod. One end of an inlet channel opened on the inlet block is an inlet located on the side wall of the inlet block, and the other end of the horizontally extending inlet channel is connected to the upper end of an upper guide hole opened in the inlet block and extending vertically. A guide block is installed at the lower end of the inlet block, and a lower guide hole is opened on the vertically extending guide block, the upper end of which is connected to the lower end of the upper guide hole. The lower end of the lower guide hole extends to the lower end face of the guide block to form an outlet.

[0005] The sealing part of the sealing head is located below the glue outlet. The connecting rod of the sealing head extends upward into the lower glue guide hole and connects with the piston rod. The outer surfaces of the piston rod and the connecting rod of the sealing head, which pass through the upper glue guide hole and the lower glue guide hole in sequence, form a glue guide channel connecting the glue inlet and the glue outlet between the inner walls of the upper glue guide hole and the lower glue guide hole. When the sealing head moves to a high position with the piston rod, its sealing part seals with the glue outlet. When the sealing head moves to a low position with the piston rod, a glue outlet gap is formed between its sealing part and the glue outlet.

[0006] A sealing block is provided above the glue inlet block. A sealing assembly is provided between the outer surface of the piston rod passing through the upper end of the sealing block and the inner wall of the mounting hole opened on the sealing block. A lower partition, a partition, and an upper partition are arranged vertically spaced above the sealing block. The lower partition is located on the upper surface of the sealing block. A servo drive mechanism is installed on the upper surface of the upper partition. The output shaft of the servo drive mechanism is connected to the upper end of the piston rod for driving the piston rod to move vertically. A pad is provided between the lower partition and the partition. At least two metal connecting posts are provided between the partition and the upper partition. Several metal fins are provided on the outer side of each metal connecting post.

[0007] The following are further improvements to the above technical solution:

[0008] 1. In the above scheme, the lower partition, the partition and the upper partition are all porous vacuum silicon partitions, and the pad is a porous vacuum silicon pad.

[0009] 2. In the above scheme, the lower partition, partition, upper partition and pad are all provided with clearance holes for the output shaft or piston rod of the servo drive mechanism to pass through.

[0010] 3. In the above scheme, a viewing window is provided on at least one side surface of the pad, and an identification protrusion is provided on the piston rod within the viewing window area.

[0011] 4. In the above scheme, a guide tube is provided inside the upper guide hole and the lower guide hole and on the outside of the connecting rod of the piston rod and the sealing head. The outer walls of the upper and lower ends of the guide tube are connected to the glue inlet block and the guide block respectively through sealing rings.

[0012] 5. In the above scheme, the adhesive channel is formed between the inner wall of the adhesive tube and the connecting rod of the piston rod and the sealing head, and the inner wall of the lower end of the adhesive tube has a radially inward flange, and the adhesive outlet is formed on the inner side of the flange.

[0013] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0014] This utility model relates to a metering switch valve for photovoltaic dispensing. The outer surfaces of the piston rod and the connecting rod of the sealing head, which sequentially pass through the upper and lower dispensing holes, form a dispensing channel connecting the inlet and outlet. When the sealing head moves to a high position with the piston rod, its sealing part seals against the outlet. When the sealing head moves to a low position with the piston rod, a dispensing gap forms between the sealing part and the outlet. A sealing block is positioned above the inlet block. A sealing assembly is positioned between the outer surface of the piston rod, which passes through the sealing block, and the inner wall of the mounting hole on the sealing block. Above the sealing block, a lower partition, a partition, and an upper partition are sequentially arranged vertically at intervals. The lower partition is positioned on the upper surface of the sealing block, and a servo drive mechanism is mounted on the upper surface of the upper partition. The output of this servo drive mechanism... The shaft is connected to the upper end of the piston rod for driving the piston rod to move vertically. A pad is set between the lower and upper partitions, and at least two metal connecting columns are set between the upper and lower partitions. Each metal connecting column has several metal fins on its outer side. In addition to metering and pressurizing the glue, a high-precision dispensing operation is achieved through the dispensing valve. During the entire dispensing process, the servo drive mechanism converts the rotary motion into linear motion to drive the sealing head to reciprocate and achieve the glue switching operation, improving the speed and sensitivity of glue switching, thereby improving the accuracy of glue dispensing and the consistency of glue dispensing multiple times. It also effectively blocks and dissipates the heat carried by the flowing hot melt glue, ensuring that the hot melt glue has good fluidity and avoiding the performance degradation and shortened service life of the servo drive mechanism due to heat. Attached Figure Description

[0015] Appendix Figure 1 This is a schematic diagram of the overall structure of the metering switch valve for photovoltaic dispensing processing according to this utility model;

[0016] Appendix Figure 2 For the appendix Figure 1 A schematic cross-sectional view along the middle AA section;

[0017] Appendix Figure 3 For the appendix Figure 1 A schematic cross-sectional view of the middle BB;

[0018] Appendix Figure 4 For the appendix Figure 3 Enlarged view of point C in the middle;

[0019] Appendix Figure 5 This is a partial structural schematic diagram of the metering switch valve for photovoltaic dispensing processing according to this utility model;

[0020] Appendix Figure 6 For the appendix Figure 5 A schematic cross-sectional view of the middle DD.

[0021] In the attached diagrams: 1. Servo drive mechanism; 2. Inlet block; 201. Upper guide hole; 202. Mounting groove; 3. Piston rod; 4. Sealing head; 41. Sealing part; 42. Connecting rod part; 51. Inlet; 52. Outlet; 61. Inlet channel; 62. Guide channel; 7. Sealing block; 71. Mounting hole; 72. Sealing assembly; 9. Guide block; 91. Lower guide hole; 92. Sealing ring; 10. Guide tube; 11. Flange part; 121. Lower partition; 122. Partition; 123. 13. Upper partition; 14. Pad block; 15. Viewing window; 16. Metal connecting column; 17. Metal fins; 18. Metering pump; 19. Liquid inlet; 20. Liquid outlet; 11. Adapter block; 22. L-shaped liquid inlet channel; 23. L-shaped liquid outlet channel; 24. Glue supply tube; 25. Connecting block; 26. Connecting channel; 27. Heating element; 28. First pressure sensor; 29. ​​Second pressure sensor; 20. Body; 21. Sensing unit; 22. Control unit; 23. Heat sink fins. Detailed Implementation

[0022] The present patent can be further understood through the specific embodiments given below, but they are not intended to limit the present patent.

[0023] Example 1: A metering switch valve for photovoltaic dispensing processing includes: a dispensing valve with an inlet 51 and an outlet 52, and a metering pump 16 connected to an adhesive supply unit and the dispensing valve respectively. The inlet 161 of the metering pump 16 is connected to the adhesive supply unit, and the inlet 51 of the dispensing valve is connected to the outlet 162 of the metering pump 16. The dispensing valve further includes: an inlet block 2, a vertically extending piston rod 3, and a sealing head 4 installed at the lower end of the piston rod 3. One end of the glue inlet channel 61 is a glue inlet 51 located on the side wall of the glue inlet block 2. The other end of the horizontally extending glue inlet channel 61 is connected to the upper end of the vertically extending upper glue guide hole 201 opened in the glue inlet block 2. A glue guide block 9 is installed at the lower end of the glue inlet block 2. A lower glue guide hole 91 is opened on the vertically extending glue guide block 9, the upper end of which is connected to the lower end of the upper glue guide hole 201. The lower end of the lower glue guide hole 91 extends to the lower end face of the glue guide block 9 to form a glue outlet 52.

[0024] 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 lower glue guide hole 91 and is connected to the piston rod 3. The outer surfaces of the piston rod 3 and the connecting rod part 42 of the sealing head 4, which are inserted into the upper glue guide hole 201 and the lower glue guide hole 91 respectively, form a glue guide channel 62 connecting the glue inlet 51 and the glue outlet 52 between the inner walls of the upper glue guide hole 201 and the lower glue guide hole 91. When the sealing head 4 moves to a high position with the piston rod 3, its sealing part 41 is sealed 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.

[0025] A sealing block 7 is provided above the glue inlet block 2. A sealing assembly 72 is provided between the outer surface of the piston rod 3, which passes through the upper end of the sealing block 7, and the inner wall of the mounting hole 71 opened on the sealing block 7. A lower partition 121, a partition 122, and an upper partition 123 are arranged vertically and spaced apart above the sealing block 7. The lower partition 121 is provided on the upper surface of the sealing block 7. A servo drive mechanism 1 is installed on the upper surface of the upper partition 123. The output shaft of the servo drive mechanism 1 is connected to the upper end of the piston rod 3 for driving the piston rod 3 to move vertically. A pad 13 is provided between the lower partition 121 and the partition 122. At least two metal connecting posts 14 are provided between the partition 13 and the upper partition 123. Several metal fins 15 are provided on the outer side of each metal connecting post 14.

[0026] During the dispensing process, the servo drive mechanism converts the rotary motion into linear motion, driving the sealing head to reciprocate and switch the dispensing gap, thereby improving the speed and sensitivity of dispensing and thus improving the accuracy of dispensing volume and the consistency of dispensing volume in multiple applications. Furthermore, the partition and metal fins effectively block and dissipate the heat carried by the flowing hot melt adhesive, ensuring that the hot melt adhesive has good fluidity and preventing the servo drive mechanism from being overheated, which would lead to a decrease in performance and a shortened service life.

[0027] The lower partition 121, partition 122 and upper partition 123 are all porous vacuum silicon partitions, and the pad 13 is a porous vacuum silicon pad. The lower partition 121, partition 122, upper partition 123 and pad 13 are all provided with clearance through holes for the piston rod 3 of the servo drive mechanism 1 to pass through. At least one side surface of the pad 13 is provided with a viewing window 131, and the piston rod 3 has an identification protrusion located in the area of ​​the viewing window 131.

[0028] A guide tube 10 is provided inside the upper guide hole 201 and the lower guide hole 91 and outside the connecting rod portion 42 of the piston rod 3 and the sealing head 4. The outer walls of the upper and lower ends of the guide tube 10 are connected to the glue inlet block 2 and the guide block 9 respectively through sealing rings.

[0029] The aforementioned adhesive channel 62 is formed between the inner wall of the adhesive tube 10 and the connecting rod portion 42 of the piston rod 3 and the sealing head 4. The inner wall of the lower end of the adhesive tube 10 has a radially inward flange portion 11, and the adhesive outlet 52 is formed on the inner side of the flange portion 11.

[0030] The aforementioned adhesive guide tube 10 is a metal adhesive guide tube; an installation groove 202 is provided on the lower surface of the aforementioned adhesive inlet block 2 and outside the upper adhesive guide hole 201, and the upper end of the adhesive guide block 9 is embedded in this installation groove 202 and sealed with the inner wall of the installation groove 202 by a sealing ring 92.

[0031] Example 2: A metering switch valve for photovoltaic dispensing processing, comprising: a dispensing valve having an inlet 51 and an outlet 52, and a metering pump 16 connected to an adhesive supply unit and the dispensing valve respectively. The inlet 161 of the metering pump 16 is connected to the adhesive supply unit, and the inlet 51 of the dispensing valve is connected to the outlet 162 of the metering pump 16. The dispensing valve further comprises: an inlet block 2, a vertically extending piston rod 3, and a sealing head 4 installed at the lower end of the piston rod 3. One end of the glue inlet channel 61 is a glue inlet 51 located on the side wall of the glue inlet block 2. The other end of the horizontally extending glue inlet channel 61 is connected to the upper end of the vertically extending upper glue guide hole 201 opened in the glue inlet block 2. A glue guide block 9 is installed at the lower end of the glue inlet block 2. A lower glue guide hole 91 is opened on the vertically extending glue guide block 9, the upper end of which is connected to the lower end of the upper glue guide hole 201. The lower end of the lower glue guide hole 91 extends to the lower end face of the glue guide block 9 to form a glue outlet 52.

[0032] 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 lower glue guide hole 91 and is connected to the piston rod 3. The outer surfaces of the piston rod 3 and the connecting rod part 42 of the sealing head 4, which are inserted into the upper glue guide hole 201 and the lower glue guide hole 91 respectively, form a glue guide channel 62 connecting the glue inlet 51 and the glue outlet 52 between the inner walls of the upper glue guide hole 201 and the lower glue guide hole 91. When the sealing head 4 moves to a high position with the piston rod 3, its sealing part 41 is sealed 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.

[0033] A sealing block 7 is provided above the glue inlet block 2. A sealing assembly 72 is provided between the outer surface of the piston rod 3, which passes through the upper end of the sealing block 7, and the inner wall of the mounting hole 71 opened on the sealing block 7. A lower partition 121, a partition 122, and an upper partition 123 are arranged vertically at intervals above the sealing block 7. The lower partition 121 is provided on the upper surface of the sealing block 7. A servo drive mechanism 1 is installed on the upper surface of the upper partition 123. The output shaft of the servo drive mechanism 1 is connected to the upper end of the piston rod 3 for driving the piston rod 3 to move vertically. A pad 13 is provided between the lower partition 121 and the partition 122. At least two metal connecting posts 14 are provided between the partition 13 and the upper partition 123. Several metal fins 15 are provided on the outer side of each metal connecting post 14.

[0034] Four metal connecting posts 14 are provided, located at the four corners of the upper partition 123 respectively; the metal fins 15 are spirally wound around the outer circumferential surface of the metal connecting posts 14.

[0035] Below the metering pump 16, there is a connecting block 17. The connecting block 17 has an L-shaped inlet channel 18 and an L-shaped outlet channel 19. One end of the L-shaped inlet channel 18 is connected to the inlet 161 of the metering pump 16, and the other end is connected to the glue supply unit through a glue supply pipe 20. The other end of the L-shaped outlet channel 19 is connected to the outlet 162 of the metering pump 16, and the other end extends to the other side surface of the connecting block 17 and is connected to the glue inlet 51 of the dispensing valve through a connecting block 21 with a connecting channel 211. At least one heating tube 22 is embedded in both the connecting block 17 and the connecting block 21. The glue can be heated in real time during the glue supply process to the dispensing valve to ensure the fluidity of the hot melt glue, thereby ensuring the accuracy and effect of dispensing.

[0036] A first pressure sensor 23 is installed on the aforementioned adapter block 17, and a second pressure sensor 24 is installed on the glue inlet block 2 on the side opposite to the glue inlet 51. Both the first pressure sensor 23 and the second pressure sensor 24 include a body 251, a sensing unit 252 located at one end of the body 251, and a control unit 253 located at the other end of the body 251. The sensing unit 252 of the first pressure sensor 23 is connected to the L-shaped liquid inlet channel 18 through a pipeline, and the sensing unit 252 of the second pressure sensor 24 is connected to the glue guide channel 62 through a pipeline. Several sensing and heat dissipation fins 254 are provided on the outer side of the body 251 of the first pressure sensor 23 and the second pressure sensor 24 near the sensing unit 252. These fins can monitor the glue inlet and outlet pressures in real time to avoid abnormal glue supply pressure caused by glue blockage, and can also effectively prevent damage to the sensors due to excessive glue temperature.

[0037] When in use, the switch valve is installed on the dispensing mechanism and then the whole assembly is installed on the three-axis drive mechanism for dispensing adhesive around the edges of rectangular photovoltaic glass.

[0038] The hot melt adhesive, which has been treated at high temperature and has fluidity, is injected from the adhesive supply tube through an external adhesive supply unit, such as a pressure plate pump. The adhesive enters the inlet of the metering pump through an L-shaped inlet channel, and then passes through the L-shaped outlet channel of the metering pump and the connecting channel on the connecting block before finally entering the dispensing valve. Throughout the entire process of the adhesive flow, the adhesive is continuously heated by the heating tubes in each metal block to ensure that the hot melt adhesive always maintains a high temperature (around 150°C), thereby ensuring the fluidity of the adhesive. The metering pump is purchased externally and is mainly used for metering and adding. It is not part of the invention of this patent and will not be described in detail here.

[0039] During the dispensing process, the servo drive mechanism converts the rotary motion into linear motion, driving the sealing head to reciprocate and switch the dispensing gap, thereby improving the speed and sensitivity of dispensing and thus improving the accuracy of dispensing volume and the consistency of dispensing volume in multiple applications. Furthermore, the partition and metal fins effectively block and dissipate the heat carried by the flowing hot melt adhesive, ensuring that the hot melt adhesive has good fluidity and preventing the servo drive mechanism from being overheated, which would lead to a decrease in performance and a shortened service life.

[0040] When using the aforementioned metering switch valve for photovoltaic dispensing, it not only meters and pressurizes the adhesive, but also achieves high-precision dispensing operation through the dispensing valve. Throughout the dispensing process, the servo drive mechanism converts rotary motion into linear motion to drive the sealing head to reciprocate and achieve the dispensing operation, improving the speed and sensitivity of dispensing, thereby improving the accuracy of dispensing volume and the consistency of dispensing volume in multiple applications. It also effectively blocks and dissipates the heat carried by the flowing hot melt adhesive, ensuring that the hot melt adhesive has good fluidity and avoiding performance degradation and shortened service life of the servo drive mechanism due to heat.

[0041] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A metering switch valve for photovoltaic dispensing processes, comprising: The point glue valve is provided with a glue inlet (51) and a glue outlet (52), and a metering pump (16) connected with the glue supply unit and the point glue valve respectively, the liquid inlet (161) of the metering pump (16) is connected with the glue supply unit, the glue inlet (51) of the point glue valve is connected with the liquid outlet (162) of the metering pump (16), the point glue valve further comprises: a glue inlet block (2), a vertically extending piston rod (3) and a glue sealing head (4) installed at the lower end of the piston rod (3), a glue inlet channel (61) is provided on the glue inlet block (2), one end of the glue inlet channel (61) is the glue inlet (51) on the side wall of the glue inlet block (2), the other end of the horizontally extending glue inlet channel (61) is communicated with the upper end of the vertically extending upper glue guide hole (201) provided in the glue inlet block (2), characterized in that: the lower end of the glue inlet block (2) is installed with a glue guide block (9), a vertically extending glue guide block (9) is provided with a lower glue guide hole (91) with the upper end communicated with the lower end of the upper glue guide hole (201), the lower end of the lower glue guide hole (91) extends to the lower end face of the glue guide block (9) to form the glue outlet (52); The sealing part (41) of the glue sealing head (4) is located below the glue outlet (52), the connecting rod part (42) of the glue sealing head (4) extends upward into the lower glue guide hole (91) and is connected with the piston rod (3), the outer side surfaces of the piston rod (3) and the connecting rod part (42) of the glue sealing head (4) penetrating the upper glue guide hole (201) and the lower glue guide hole (91) in sequence form the glue guide channel (62) communicated with the glue inlet (51) and the glue outlet (52) between the inner walls of the upper glue guide hole (201) and the lower glue guide hole (91), when the glue sealing head (4) moves to the high position with the piston rod (3), the sealing part (41) is sealed with the glue outlet (52), when the glue sealing head (4) moves to the low position with the piston rod (3), the glue outlet gap is formed between the sealing part (41) and the glue outlet (52); A sealing block (7) is arranged above the glue inlet block (2), a sealing assembly (72) is arranged between the outer side surface of the piston rod (3) penetrating the sealing block (7) and the inner wall of the mounting hole (71) provided on the sealing block (7), the lower partition plate (121), the partition plate (122) and the upper partition plate (123) are arranged above the sealing block (7) in sequence and are spaced apart in the vertical direction, the lower partition plate (121) is arranged on the upper surface of the sealing block (7), the upper surface of the upper partition plate (123) is installed with a servo driving mechanism (1), the output shaft of the servo driving mechanism (1) is in transmission connection with the upper end of the piston rod (3) for driving the piston rod (3) to move in the vertical direction, a pad block (13) is arranged between the lower partition plate (121) and the partition plate (122), at least two metal connecting columns (14) are arranged between the partition plate (122) and the upper partition plate (123), and a plurality of metal fins (15) are arranged on the outer side of each metal connecting column (14).

2. The metering switch valve for photovoltaic dispensing processing according to claim 1, characterized in that: The lower partition plate (121), the partition plate (122) and the upper partition plate (123) are all porous vacuum silicon partition plates, and the cushion block (13) is a porous vacuum silicon cushion block.

3. The metering switch valve for photovoltaic dispensing processing according to claim 1, characterized in that: The lower partition plate (121), the partition plate (122), the upper partition plate (123) and the cushion block (13) are all provided with a position-avoiding through hole for the output shaft or the piston rod (3) of the servo driving mechanism (1) to pass through.

4. The metering switch valve for photovoltaic dispensing processing according to claim 1, characterized in that: At least one side surface of the cushion block (13) is provided with a window hole (131), and the piston rod (3) is provided with an identification protrusion in the region of the window hole (131).

5. The metering switch valve for photovoltaic dispensing processing according to claim 1, characterized in that: A glue guide pipe (10) is arranged in the upper glue guide hole (201) and the lower glue guide hole (91) and outside the connecting rod part (42) of the piston rod (3) and the glue sealing head (4), and the outer wall of the upper and lower ends of the glue guide pipe (10) is connected with the glue feeding block (2) and the glue guide block (9) through sealing rings respectively.

6. The metering switch valve for photovoltaic dispensing processing according to claim 2, characterized in that: The glue guide flow channel (62) is formed between the inner wall of the glue guide pipe (10) and the connecting rod part (42) of the piston rod (3) and the glue sealing head (4), the inner wall of the lower end of the glue guide pipe (10) is provided with a radially inward flange part (11), and the glue outlet (52) is formed on the inner side of the flange part (11).

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