Pressure regulating valve for glue supply system

Abstract

The invention discloses a pressure regulating valve for a glue supply system, which comprises a base respectively provided with a liquid inlet and a liquid outlet, a liquid inlet channel is arranged in the base, the lower end of the liquid inlet channel with the upper end communicated with the liquid inlet is communicated with a lower cavity, a plug is arranged on a second mounting seat in the lower cavity and is positioned on one side close to the liquid inlet channel, and the liquid inlet channel is communicated with the lower cavity. A connecting pipe is installed on the lower portion of the liquid inlet channel in an embedded mode, the plug can be embedded into the lower end of the connecting pipe and is in close fit with the inner wall of the connecting pipe, and a spring in a compressed state is vertically arranged between the other side of the second installation base and the supporting base. The plug is in sealing fit with an outlet in the lower end of the liquid inlet channel, and a liquid outlet channel communicated with the lower cavity and the liquid outlet is arranged on the base and located on the side, opposite to the liquid inlet, of the liquid inlet channel. The balance and stability of output fluid pressure can be improved, stress disturbance caused by eccentricity of the plug can be avoided, and the balance and stability of fluid pressure adjustment are further guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of photovoltaic glue technology, and particularly relates to a pressure regulating valve for a glue supply system. BACKGROUND

[0002] With the innovation of technology and the needs of social development, the requirements for production processes in industrial production are increasingly stringent, and the use of glue in industrial production also needs to make corresponding high requirements. The diversity of glue varieties in the market causes the diversity of the application range and application conditions of glue. Therefore, the design of the functions of the gluing machine needs to be paid attention to, and the pressure stabilizing device is a very important component in the application of the gluing machine.

[0003] With the increasing requirements of the country for environmental protection, solar power generation is valued by the power generation industry. In addition to solar energy, the most important thing in the solar power generation industry is photovoltaic modules. In the production process of photovoltaic modules, frame glueing machines and junction box glueing machines are used to glue the frame and the junction box respectively. When gluing such large-size parts as photovoltaic modules, a large amount of glue is needed, and the output of glue liquid from the self-glue supply unit is large, which can easily lead to unstable final glue output pressure and glue output. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a pressure regulating valve for a glue supply system, which can improve the balance and stability of the output fluid pressure, and can also avoid the stress disturbance caused by the eccentricity of the plug, further ensuring the balance and stability of the fluid pressure regulation.

[0005] To solve the above technical problems, the technical scheme adopted by the present application is: a pressure regulating valve for a glue supply system, comprising: a base provided with a liquid inlet and a liquid outlet, respectively, an upper end of the base is sealingly connected with a guide seat and forms an upper cavity with the guide seat, a lower end of the base is sealingly connected with a support seat and forms a lower cavity with the support seat, a first mounting seat is arranged in the upper cavity, a second mounting seat is arranged in the lower cavity, and the first mounting seat and the second mounting seat can move in the vertical direction and are connected by a connecting rod passing through the base; The upper end of the guide seat is threadedly connected to an adjusting seat, forming an adjusting chamber between the guide seat and the adjusting seat. The lower end of a vertically extending push rod is connected to a first mounting seat. The upper end of the push rod, which slides with the guide seat, extends into the adjusting chamber and is connected to an adjusting block. An elastic element in a compressed state is provided between the adjusting block and the adjusting seat. The upper end of the adjusting block is embedded in the central through hole of the elastic element. The lower end of the adjusting block has a radially outward flange. The upper surface of the flange is in contact with the lower end face of the elastic element. A downward-opening conical groove is opened in the center of the lower surface of the adjusting block. The upper end of the push rod is provided with a conical part that matches the inner wall of the conical groove. The conical part is correspondingly embedded in the conical groove on the adjusting block. A clearance groove communicating with the conical groove is opened on the adjusting block. The clearance groove is located directly above the conical groove. The base is provided with a liquid inlet channel. The upper end of the liquid inlet channel is connected to the liquid inlet, and the lower end of the liquid inlet channel is connected to the lower cavity. A plug is installed on the second mounting seat in the lower cavity, near the side of the liquid inlet channel. A connecting pipe is embedded in the lower part of the liquid inlet channel. The plug can be embedded in the lower end of the connecting pipe and fits tightly with the inner wall of the connecting pipe. A compressed spring is vertically arranged between the other side of the second mounting seat and the support seat. When it is not in the liquid inlet state, the plug is sealed with the outlet at the lower end of the liquid inlet channel. An outlet channel is provided on the base, opposite to the liquid inlet, connecting the lower cavity and the outlet.

[0006] The following are further improvements to the above technical solution: 1. In the above scheme, the upper surface of the adjusting seat is provided with an air hole that communicates with the adjusting chamber.

[0007] 2. In the above solution, the tube body of the connecting nozzle is embedded in the liquid inlet channel, and a plurality of liquid outlet holes are opened on the outer surface of the annular part of the connecting nozzle located below the tube body and having an inner diameter larger than the tube body.

[0008] 3. In the above solution, the plug includes: a main body portion that can be slidably embedded in an annular portion, a ball head portion formed in the center of the upper surface of the main body portion and embedded in a tube portion, and a cylindrical portion extending downward from the center of the lower surface of the main body portion. The upper surface of the main body portion has an annular groove formed around the ball head portion. The cylindrical portion is embedded in a mounting hole formed in the upper surface of the second mounting base and is clearance-fitted with the inner wall of the mounting hole. The main body portion has a radially outward flange located below the connecting nozzle. The lower surface of the flange is in contact with the upper surface of the second mounting base. When in a non-liquid-feeding state, the ball head portion of the plug portion is sealed to the tube portion of the connecting nozzle portion.

[0009] 4. In the above scheme, the inner wall of the upper part of the connecting pipe is an open cone shape.

[0010] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: 1. The pressure regulating valve for the glue supply system of the present invention comprises a guide seat with an adjusting seat connected to the upper end by a thread, forming an adjusting chamber between the guide seat and the adjusting seat. The lower end of a vertically extending push rod is connected to a first mounting seat. The upper end of the push rod, which slides with the guide seat, extends into the adjusting chamber and is connected to an adjusting block. An elastic element in a compressed state is provided between the adjusting block and the adjusting seat. The upper end of the adjusting block is embedded in the central through hole of the elastic element. The lower end of the adjusting block has a radially outward flange. The upper surface of the flange is in contact with the lower end face of the elastic element. A downward-facing conical groove is formed in the center of the lower surface of the adjusting block. The upper end of the push rod is provided with a conical part that matches the inner wall of the conical groove. The conical part is correspondingly embedded in the conical groove on the adjusting block. A clearance groove communicating with the conical groove is formed on the adjusting block. The clearance groove is located directly above the conical groove. A liquid inlet channel is provided in the base. The upper end of the liquid inlet channel is connected to the liquid inlet. The lower end of the channel is connected to the lower cavity. A plug is installed on the second mounting seat inside the lower cavity, near the side of the inlet channel. A compressed spring is vertically installed between the other side of the second mounting seat and the support seat. This allows the fluid entering from the inlet at a certain pressure to flow through the inlet channel and the lower cavity in sequence, and then be output from the outlet at a lower pressure. This improves the balance and stability of the output fluid pressure. At the same time, the length of the regulating chamber can be adjusted by rotating the guide seat, thereby adjusting the compression state of the elastic element and ultimately achieving elastic adjustment of the spring tension. This allows for the adjustment of the fluid pressure at the outlet after pressure reduction and stabilization, further meeting the needs for fluid pressure regulation and ensuring the consistency and stability of the fluid pressure at the outlet. Furthermore, during the adjustment process, the concentricity between the adjusting block and the push rod can be adaptively adjusted to ensure the uniformity and stability of the force applied at each point, thereby improving the balance and stability of the fluid pressure at the outlet.

[0011] 2. The pressure regulating valve for the glue supply system of the present invention further includes a connecting nozzle installed at the lower part of the liquid inlet channel. The tube portion of the connecting nozzle is embedded in the liquid inlet channel. A plurality of liquid outlet holes are formed on the outer surface of the annular portion of the connecting nozzle located below the tube portion and having an inner diameter larger than the tube portion. The plug includes: a main body portion slidably embedded in the annular portion, a ball head formed at the center of the upper surface of the main body portion and embedded in the tube portion, and a cylindrical portion extending downward from the center of the lower surface of the main body portion. The upper surface of the main body portion has an annular groove surrounding the ball head. The cylindrical portion is embedded in a mounting hole formed on the upper surface of the second mounting base and has a clearance fit with the inner wall of the mounting hole. The main body portion has a radially outward flange located below the connecting nozzle. The lower surface of the flange is in contact with the upper surface of the second mounting base. When… When not in the liquid-inlet state, the ball head of the plug and the tube body of the connecting nozzle, through the opening and closing of the ball head of the plug and the tube body of the connecting nozzle, allow the fluid entering from the liquid inlet at a certain pressure to flow sequentially through the liquid inlet channel and the lower cavity, and then be output from the liquid outlet at a lower pressure. This can improve the balance and stability of the output fluid pressure. Furthermore, by setting the plug to float, adaptive coaxial adjustment between the reciprocating extension and retraction of the plug and the liquid inlet channel can be achieved, avoiding force disturbance caused by plug eccentricity. This can not only improve the service life of the component, but also further ensure the balance and stability of fluid pressure regulation. The ball head on the plug and the annular groove opened around the ball head can further equalize and depressurize the flowing fluid, thereby improving the balance and stability of the fluid pressure at the liquid outlet. Attached Figure Description

[0012] Appendix Figure 1 This is a schematic diagram of the overall structure of the manually adjustable pressure regulating valve of the present invention; Appendix Figure 2 For the appendix Figure 1 A schematic cross-sectional view along the middle AA section; Appendix Figure 3 For the appendix Figure 2 Enlarged view of point C in the middle; Appendix Figure 4 For the appendix Figure 2 Enlarged view of point D in the middle; Appendix Figure 5 For the appendix Figure 2 Enlarged view of point E in the middle; Appendix Figure 6 For the appendix Figure 1 A schematic cross-sectional view of the middle BB; Appendix Figure 7 This is a partial structural schematic diagram of the manually adjustable pressure regulating valve of the present invention; Appendix Figure 8 For the appendix Figure 7 A cross-sectional view of the middle FF.

[0013] In the attached diagrams: 1. Liquid inlet; 2. Liquid outlet; 3. Base; 301. Body; 302. Upper sleeve; 303. Lower sleeve; 4. Guide seat; 5. Support seat; 51. Mounting hole; 61. Upper cavity; 62. Lower cavity; 71. First mounting seat; 72. Second mounting seat; 8. Connecting rod; 81. Screw; 82. Connecting sleeve; 9. Push rod; 10. Liquid inlet channel; 11. Plug; 12. Spring; 13. Liquid outlet channel; 14. Connecting nozzle; 141. Tube body 142. Annular part; 151. Plug ring; 152. Pressure ring; 153. Retaining ring; 16. Threaded plug; 171. Sealing ring; 172. Retaining ring; 18. Adjusting seat; 19. Adjusting chamber; 20. Adjusting block; 21. Elastic element; 22. Air hole; 23. Flange part; 24. Conical groove; 25. Conical part; 26. Alternating groove; 27. Mounting hole; 28. Flange; 29. ​​Ball head; 30. Main body part; 31. Column part; 32. Annular groove; 33. Liquid outlet through hole. Detailed Implementation

[0014] The present patent can be further understood through the specific embodiments given below, but they are not intended to limit the present patent.

[0015] Example 1: A manually adjustable pressure regulating valve includes: a base 3 with an inlet 1 and an outlet 2 respectively; a guide seat 4 is sealed to the upper end of the base 3, forming an upper cavity 61 between the base 3 and the guide seat 4; a support seat 5 is sealed to the lower end of the base 3, forming a lower cavity 62 between the base 3 and the support seat 5; a first mounting seat 71 is provided in the upper cavity 61; and a second mounting seat 72 is provided in the lower cavity 62. The first mounting seat 71 and the second mounting seat 72, both of which can move vertically, are connected by a connecting rod 8 passing through the base 3. The upper end of the guide seat 4 is threadedly connected to an adjusting seat 18, forming an adjusting chamber 19 between the guide seat 4 and the adjusting seat 18. The lower end of a vertically extending push rod 9 is connected to a first mounting base 71. The upper end of the push rod 9, which slides with the guide seat 4, extends into the adjusting chamber 19 and is connected to an adjusting block 20. An elastic element 21 in a compressed state is provided between the adjusting block 20 and the adjusting seat 18. The upper end of the adjusting block 20 is embedded in the central through hole of the elastic element 21, and the lower end of the adjusting block 20 has... There is a radially outward flange 23, the upper surface of which is in contact with the lower end face of the elastic member 21. The lower surface of the adjusting block 20 has a downward-facing conical groove 24. The upper end of the push rod 9 is provided with a conical part 25 that matches the inner wall of the conical groove 24. The conical part 25 is correspondingly embedded in the conical groove 24 on the adjusting block 20. The adjusting block 20 has a clearance groove 26 that communicates with the conical groove 24. The clearance groove 26 is located directly above the conical groove 24. A liquid inlet channel 10 is provided inside the base 3. The upper end of the liquid inlet channel 10 is connected to the liquid inlet 1, and the lower end of the liquid inlet channel 10 is connected to the lower cavity 62. A plug 11 is installed on the second mounting seat 72 inside the lower cavity 62 and on the side of the second mounting seat 72 close to the liquid inlet channel 10. A spring 12 in a compressed state is vertically arranged between the other side of the second mounting seat 72 and the support seat 5. When it is not in the liquid inlet state, the plug 11 is sealed to the outlet at the lower end of the liquid inlet channel 10. A liquid outlet channel 13 is provided on the base 3 on the side of the liquid inlet channel 10 opposite to the liquid inlet 1, which connects the lower cavity 62 and the liquid outlet 2.

[0016] The upper surface of the aforementioned regulating seat 18 is provided with an air hole 22 that communicates with the regulating chamber 19. This can effectively avoid adverse interference to the valve body caused by changes in gas pressure in the chamber during the adjustment of the internal length of the regulating chamber, and facilitate the loading and unloading of components and improve the safety of the valve body.

[0017] A connector 14 is installed at the lower part of the aforementioned liquid inlet channel 10. The tube body 141 of the connector 14 is embedded in the liquid inlet channel 10. The annular portion 142 of the connector 14, which is located below the tube body 141 and has an inner diameter larger than the tube body 141, has several liquid outlet holes 33 on its outer surface. The plug 11 includes: a main body 30 that can be slidably embedded in the annular portion 142; a ball head 29 formed in the center of the upper surface of the main body 30 and embedded in the tube body 141; and a column extending downward from the center of the lower surface of the main body 30. The main body 30 has an annular groove 32 around the ball head 29 on its upper surface. The cylindrical part 31 is embedded in the mounting hole 27 on the upper surface of the second mounting base 72 and is clearance-fitted with the inner wall of the mounting hole 27. The main body 30 has a radially outward flange 28 located on and below the connecting nozzle 14. The lower surface of the flange 28 is in contact with the upper surface of the second mounting base 72. When in a non-liquid-feeding state, the ball head 29 of the plug 11 is sealed to the tube part 141 of the connecting nozzle 14.

[0018] The inner wall of the annular groove 32 is an arc-shaped surface.

[0019] The above-mentioned liquid outlet holes 33, which are arranged at intervals along the circumference, are provided in four locations.

[0020] The aforementioned spherical head 29 is set to a hemispherical shape.

[0021] The aforementioned elastic element 21 is a heavy-duty rectangular spring.

[0022] An adjustment groove is provided on the upper surface of the guide seat 4 and the lower surface of the adjustment seat 18. The lower end of the adjustment seat 18 is embedded in the adjustment groove on the guide seat 4, thereby forming the adjustment chamber 19 between the two adjustment grooves.

[0023] The lower outer surface of the adjusting seat 18 is connected to the inner wall of the adjusting groove on the guide seat 4 by a thread.

[0024] The upper end of the liquid outlet channel 13, which is connected to the lower cavity 62, is connected to the upper cavity 61. The upper cavity provides space for further buffering and static pressure of the depressurized liquid, thereby improving the balance and stability of the liquid pressure discharged from the outlet on the basis of achieving liquid pressure.

[0025] Example 2: A manually adjustable pressure regulating valve includes: a base 3 with an inlet 1 and an outlet 2 respectively; a guide seat 4 is sealed to the upper end of the base 3, forming an upper cavity 61 between the base 3 and the guide seat 4; a support seat 5 is sealed to the lower end of the base 3, forming a lower cavity 62 between the base 3 and the support seat 5; a first mounting seat 71 is provided in the upper cavity 61; and a second mounting seat 72 is provided in the lower cavity 62. The first mounting seat 71 and the second mounting seat 72, both of which can move vertically, are connected by a connecting rod 8 passing through the base 3. The upper end of the guide seat 4 is threadedly connected to an adjusting seat 18, forming an adjusting chamber 19 between the guide seat 4 and the adjusting seat 18. The lower end of a vertically extending push rod 9 is connected to a first mounting base 71. The upper end of the push rod 9, which slides with the guide seat 4, extends into the adjusting chamber 19 and is connected to an adjusting block 20. An elastic element 21 in a compressed state is provided between the adjusting block 20 and the adjusting seat 18. The upper end of the adjusting block 20 is embedded in the central through hole of the elastic element 21, and the lower end of the adjusting block 20 has... There is a radially outward flange 23, the upper surface of which is in contact with the lower end face of the elastic member 21. The lower surface of the adjusting block 20 has a downward-facing conical groove 24. The upper end of the push rod 9 is provided with a conical part 25 that matches the inner wall of the conical groove 24. The conical part 25 is correspondingly embedded in the conical groove 24 on the adjusting block 20. The adjusting block 20 has a clearance groove 26 that communicates with the conical groove 24. The clearance groove 26 is located directly above the conical groove 24. A liquid inlet channel 10 is provided inside the base 3. The upper end of the liquid inlet channel 10 is connected to the liquid inlet 1, and the lower end of the liquid inlet channel 10 is connected to the lower cavity 62. A plug 11 is installed on the second mounting seat 72 inside the lower cavity 62 and on the side of the second mounting seat 72 close to the liquid inlet channel 10. A spring 12 in a compressed state is vertically arranged between the other side of the second mounting seat 72 and the support seat 5. When it is not in the liquid inlet state, the plug 11 is sealed to the outlet at the lower end of the liquid inlet channel 10. A liquid outlet channel 13 is provided on the base 3 on the side of the liquid inlet channel 10 opposite to the liquid inlet 1, which connects the lower cavity 62 and the liquid outlet 2.

[0026] The inner wall of the annular groove 32 is a hemispherical surface.

[0027] The aforementioned elastic element 21 is a heavy-duty rectangular spring.

[0028] An adjustment groove is provided on the upper surface of the guide seat 4 and the lower surface of the adjustment seat 18. The lower end of the adjustment seat 18 is embedded in the adjustment groove on the guide seat 4, thereby forming the adjustment chamber 19 between the two adjustment grooves.

[0029] The lower outer surface of the adjusting seat 18 is connected to the inner wall of the adjusting groove on the guide seat 4 by a thread.

[0030] A connecting pipe 14 is embedded in the lower part of the liquid inlet channel 10, and the plug 11 can be embedded in the lower end of the connecting pipe 14 and fit tightly with the inner wall of the connecting pipe 14.

[0031] The inner wall of the upper part of the connecting pipe 14 is an open cone shape.

[0032] The aforementioned connecting rod 8 is provided in two parts, and each of the two connecting rods 8 is respectively connected to the end of the first mounting base 71 and the second mounting base 72.

[0033] The aforementioned connecting rod 8 further includes a screw 81 that passes sequentially through the first mounting base 71 and the second mounting base 72, and a connecting sleeve 82 that is fitted onto the screw 81 and located between the first mounting base 71 and the second mounting base 72.

[0034] The guide seat 4 and the push rod 9 are sealed together by at least one sealing ring 151.

[0035] Two of the aforementioned plug rings 151 are provided, and a pressure ring 152 and a retaining ring 153 are stacked below the two stacked plug rings 151 in sequence.

[0036] The aforementioned plug ring 151, pressure ring 152 and retaining ring 153 are each fitted onto the push rod 9 and are tightly fitted with the inner wall of the guide seat 4.

[0037] The lower surface of the support base 5 is provided with a mounting hole 51 that communicates with the lower cavity 62. The lower end of the spring 12 is embedded in the mounting hole 51 and is in contact with the threaded plug 16 installed in the mounting hole 51.

[0038] The threaded plug 16 with external threads is threadedly connected to the inner wall of the lower end of the mounting hole 51.

[0039] The aforementioned base 3 further includes: a main body 301 with an inlet 1 and an outlet 2, an upper sleeve 302 connected to the guide seat 4, and a lower sleeve 303 connected to the support seat 5.

[0040] The lower end of the guide seat 4 with the upper cavity groove and the upper end of the support seat 5 with the lower cavity groove are respectively embedded in the upper sleeve portion 302 and the lower sleeve portion 303. A sealing ring 171 is provided between the inner wall of the upper sleeve portion 302 and the lower sleeve portion 303 and the outer surface of the guide seat 4 and the support seat 5.

[0041] Each of the above-mentioned sealing rings 171 has a retaining ring 172 on its upper and lower sides.

[0042] The working principle of this invention is as follows: The force exerted on the spring by the second mounting seat is adjusted by adjusting the push rod, thereby adjusting the reverse tension of the spring. When the inlet pressure is less than the spring tension, the plug and the outlet at the lower end of the inlet channel remain sealed. When the adjusted spring tension is less than the inlet pressure, the fluid entering from the inlet drives the plug to move towards the spring, forming a fluid channel between the plug and the inlet channel, allowing the fluid to enter the lower cavity. During this process, the fluid pressure is reduced and equalized and stabilized in the lower cavity, and finally output from the outlet. Furthermore, by connecting the upper and lower chambers through the liquid outlet channel, the buffer space of the fluid after depressurization is increased, thereby further improving the balance and stability of the fluid pressure output from the liquid outlet while depressurizing.

[0043] The aforementioned manually adjustable pressure regulating valve allows fluid entering at a certain pressure through the inlet to flow sequentially through the inlet channel and lower chamber before being output from the outlet at a lower pressure. This improves the balance and stability of the output fluid pressure. Furthermore, by rotating the guide seat, the length of the regulating chamber can be adjusted, thereby regulating the compression state of the elastic element and ultimately the elastic tension of the spring. This allows for the regulation of the fluid pressure at the outlet after pressure reduction and stabilization, further meeting the needs for fluid pressure regulation and ensuring the consistency and stability of the fluid pressure at the outlet. During the adjustment process, the concentricity between the adjusting block and the push rod can be adaptively adjusted to ensure uniform and stable forces at all points, further improving the balance and stability of the fluid pressure at the outlet. Furthermore, by opening and closing the ball head on the plug and the tube body of the connecting nozzle, the fluid entering from the inlet at a certain pressure flows sequentially through the inlet channel and the lower cavity before being output from the outlet at a lower pressure. This improves the balance and stability of the output fluid pressure. The floating design of the plug allows for adaptive coaxial adjustment between the reciprocating plug and the inlet channel, preventing force disturbances caused by plug eccentricity. This not only extends the component's lifespan but also further ensures the balance and stability of fluid pressure regulation. The ball head on the plug and the annular groove around it further equalize and depressurize the flowing fluid, thereby improving the balance and stability of the fluid pressure at the outlet.

[0044] 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 pressure regulating valve for an adhesive supply system, comprising: A base (3) having an inlet (1) and an outlet (2) is characterized in that: a guide seat (4) is sealed to the upper end of the base (3) and an upper cavity (61) is formed between the base (3) and the guide seat (4); a support seat (5) is sealed to the lower end of the base (3) and a lower cavity (62) is formed between the base (3) and the support seat (5); a first mounting seat (71) is provided in the upper cavity (61); a second mounting seat (72) is provided in the lower cavity (62); the first mounting seat (71) and the second mounting seat (72), which can move in the vertical direction, are connected by a connecting rod (8) passing through the base (3); The upper end of the guide seat (4) is threadedly connected to an adjusting seat (18), forming an adjusting chamber (19) with the adjusting seat (18). The lower end of a vertically extending push rod (9) is connected to a first mounting seat (71). The upper end of the push rod (9), which slides with the guide seat (4), extends into the adjusting chamber (19) and is connected to an adjusting block (20). An elastic element (21) in a compressed state is provided between the adjusting block (20) and the adjusting seat (18). The upper end of the adjusting block (20) is embedded in the central through hole of the elastic element (21), and the lower end of the adjusting block (20) has... There is a radially outward flange (23), the upper surface of which is pressed against the lower end face of the elastic member (21). The lower surface of the adjusting block (20) has a downward-facing conical groove (24) in the center. The upper end of the top rod (9) is provided with a conical part (25) that matches the inner wall of the conical groove (24). The conical part (25) is correspondingly embedded in the conical groove (24) on the adjusting block (20). The adjusting block (20) has a clearance groove (26) that communicates with the conical groove (24). The clearance groove (26) is located directly above the conical groove (24). A liquid inlet channel (10) is provided inside the base (3). The upper end of the liquid inlet channel (10) is connected to the liquid inlet (1), and the lower end of the liquid inlet channel (10) is connected to the lower cavity (62). A plug (11) is installed on the second mounting seat (72) inside the lower cavity (62) and on the side of the plug (72) near the liquid inlet channel (10). A connecting pipe (14) is embedded in the lower part of the liquid inlet channel (10). The plug (11) can be embedded in the lower end of the connecting pipe (14) and connect with the lower cavity (62). The inner wall of the connecting pipe (14) fits tightly. A spring (12) in a compressed state is vertically arranged between the other side of the second mounting base (72) and the support base (5). When it is in a non-liquid inlet state, the plug (11) is sealed to the outlet at the lower end of the liquid inlet channel (10). An outlet channel (13) is provided on the base (3) on the side opposite to the liquid inlet (1) of the liquid inlet channel (10), which connects the lower cavity (62) and the outlet (2).

2. The pressure regulating valve for the glue supply system according to claim 1, characterized in that: The upper surface of the adjusting seat (18) has an air hole (22) that communicates with the adjusting chamber (19).

3. The pressure regulating valve for the glue supply system according to claim 1, characterized in that: The tube body (141) of the connecting nozzle (14) is embedded in the liquid inlet channel (10). A plurality of liquid outlet holes (33) are provided on the outer surface of the annular part (142) of the connecting nozzle (14), which is located below the tube body (141) and has an inner diameter greater than that of the tube body (141).

4. The pressure regulating valve for the glue supply system according to claim 3, characterized in that: The plug (11) includes: a main body (30) that can be slidably embedded in an annular portion (142), a ball head (29) formed in the center of the upper surface of the main body (30) and embedded in the tube portion (141), and a column portion (31) extending downward from the center of the lower surface of the main body (30). The upper surface of the main body (30) has an annular groove (32) around the ball head (29). The column portion (31) is embedded in a mounting hole (27) on the upper surface of the second mounting seat (72) and is clearance-fitted with the inner wall of the mounting hole (27). The main body (30) has a radially outward flange (28) on it and below the connecting nozzle (14). The lower surface of the flange (28) is in contact with the upper surface of the second mounting seat (72). When in a non-liquid-feeding state, the ball head (29) of the plug (11) is sealed to the tube portion (141) of the connecting nozzle (14).

5. The pressure regulating valve for the glue supply system according to claim 3, characterized in that: The inner wall of the upper part of the connecting pipe (14) is an open cone shape.

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