Dispensing system for two-component glue

Abstract

The present invention discloses a two-component glue dispensing system, comprising a glue supply mechanism and a glue mixing valve. The glue supply mechanism and the glue mixing valve are connected via a glue guide hose A and a glue guide hose B, each of which is connected in parallel. A glue valve body A is mounted on the glue guide hose A, and a glue valve body B is mounted on the glue guide hose B. Each of the two glue valve bodies A and B includes a main body, a drive cavity located at each end of the main body, and a glue supply cavity having a glue inlet channel, a glue outlet channel, and a glue discharge channel. The respective glue inlet channels of the two glue valve bodies A and B are connected to the glue supply mechanism via the two glue guide hoses A and B. The two-component glue dispensing system of the present invention facilitates the discharge of waste glue containing bubbles in the glue guide hoses during the dispensing process, thereby ensuring the quality of dispensing and product processing.

Description

Technical Field

[0001] The present invention relates to the technical field of glue dispensing, in particular to a glue dispensing system for two-component glue. Background Art

[0002] With the development of the economy, the continuous upgrading of products and the continuous expansion of application fields, the demand for injection and dispensing equipment has become more extensive and diversified. For example, the more stringent requirements of industries such as automotive electronics, new energy, motors, sensors, capacitors and ignition coils have prompted the continuous improvement of injection and dispensing equipment manufacturing technology and product quality, and at the same time, higher requirements have been put forward for injection and dispensing equipment.

[0003] During the operation of the dispensing equipment, once bubbles or impurities are found in the pipeline, the equipment needs to be paused and the operator needs to manually expel the bubbles or impurities before the equipment can be started again. This is not conducive to automated assembly line production and greatly reduces the efficiency of dispensing. Summary of the Invention

[0004] The purpose of the present invention is to provide a dispensing system for two-component glue, which is convenient for discharging waste glue with bubbles in the glue guide tube during the dispensing process, thereby ensuring the quality of dispensing and product processing.

[0005] To achieve the above-mentioned object, the present invention adopts the following technical solution: a two-component glue dispensing system, comprising a glue supply mechanism and a glue mixing valve, wherein the glue supply mechanism and the glue mixing valve are connected via a glue guide hose A and a glue guide hose B arranged in parallel, wherein the glue guide hose A is provided with an A glue valve body, and the glue guide hose B is provided with a B glue valve body;

[0006] The A glue valve body and the B glue valve body each include a body, a driving cavity located at both ends of the body, and a glue supply cavity having a glue inlet channel, a glue outlet channel, and a glue discharge channel. The glue inlet channels of the A glue valve body and the B glue valve body are connected to the glue supply mechanism through the A glue guide hose and the B glue guide hose. The glue outlet channels of the A glue valve body and the B glue valve body are connected to the glue mixing valve through the A glue guide hose and the B glue guide hose. The glue discharge channels of the A glue valve body and the B glue valve body are connected to a waste liquid box through the A glue discharge hose and the B glue discharge hose.

[0007] An intermediate through hole is provided between the driving chamber and the glue supply chamber. The left and right ends of a plunger rod located in the intermediate through hole are respectively located in the driving chamber and the glue supply chamber. A first gasket is installed at one end of the glue discharge channel communicating with the glue supply chamber. The left end of the plunger rod has a plunger head that can be sealed with the first gasket. The plunger rod has a flange portion near the plunger head. A second gasket that can be sealed with the flange portion is installed at one end communicating with the intermediate through hole and the glue supply chamber. A gap channel is provided between the plunger rod and the body between the left end of the intermediate through hole and the glue discharge channel.

[0008] A piston disc is fixed to the right end of the plunger rod, which is sealed with the inner wall of the drive chamber. The piston disc is located between the left air inlet and the right air inlet. A guide sleeve for the plunger rod to be embedded is installed in the middle of the plunger rod. When the piston disc moves left and right in the drive chamber under the drive of the left air inlet or the right air inlet, the plunger head of the plunger rod moves left and right in the glue supply chamber accordingly, so that the plunger head of the plunger rod contacts the first gasket or the flange of the plunger rod contacts the second gasket.

[0009] A sealing ring is respectively provided between the guide sleeve and the glue outlet channel and the driving cavity, and the sealing ring is sealed and connected between the plunger rod and the body, and the sealing ring includes an annular base sleeved on the plunger rod, a first sealing lip sealingly matched with the plunger rod and a second sealing lip sealingly connected to the body, the first sealing lip and the second sealing lip are integrally formed on the same side of the annular base and surround a receiving groove with the annular base, a supporting frame is provided in the receiving groove, the first supporting wall of the supporting frame contacts the first sealing lip surface, and the second supporting wall of the supporting frame contacts the second sealing lip surface, an acute angle is formed between the inclined first supporting wall and the second supporting wall, the first supporting wall is provided with a plurality of inner notches extending to the second supporting wall, and the second supporting wall is provided with a plurality of outer notches extending to the first supporting wall, and the inner notches and the outer notches are staggered along the circumferential direction;

[0010] The guide sleeve includes a guide portion and a protrusion located on the side surface of the left end of the guide portion. The protrusion of the guide sleeve is located in the limiting groove of the body. The plunger rod is embedded in the through hole of the guide portion. The inner wall of the through hole of the guide portion contacts the outer side surface of the plunger rod. The inner wall surface of the through hole of the guide portion is provided with a plurality of small grooves along the axial direction. These plurality of small grooves are distributed at intervals along the circumferential direction.

[0011] The further improved scheme in the above technical scheme is as follows:

[0012] 1. In the above scheme, a bubble detection unit is installed on each of the A and B glue guide hoses and located between the A and B glue valve bodies and the glue supply mechanism. The scheme also includes a control module for generating a drive signal based on the information received from each bubble detection unit on whether there are bubbles in the hoses, and injecting air into the drive chamber through the left air inlet or the right air inlet.

[0013] 2. In the above solution, the bubble detection unit includes a base body, the base body is provided with a groove for the hose to be embedded, an ultrasonic transmitter is provided on one side of the groove, and an ultrasonic receiver is provided on the other side.

[0014] 3. In the above solution, a one-way valve is installed on each of the A and B glue guide hoses and located between the bubble detection unit and the glue supply mechanism.

[0015] 4. In the above solution, the bubble detection units on the rubber guide hose A and the rubber guide hose B are both arranged in a shell.

[0016] 5. In the above solution, the openings of the accommodating grooves on the two sealing rings face the glue outlet channel and the driving cavity respectively.

[0017] 6. In the above solution, the left air inlet and the right air inlet are connected to a solenoid valve through a vent pipe.

[0018] 7. In the above solution, the guide sleeve is a brass guide sleeve.

[0019] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0020] 1. The dispensing system for two-component glue of the present invention can realize glue mixing and dispensing while facilitating the discharge of waste glue with bubbles in the glue guide tube during the dispensing process, thereby ensuring the quality of the mixed glue and the quality of product processing; further, a sealing ring is provided on each side of the guide sleeve 2, and a supporting frame is provided in the accommodating groove of the sealing ring. The two supporting walls of the supporting frame are in contact with the sealing lip surface, and an acute angle is formed between the inclined first supporting wall and the second supporting wall. Notches are staggered on the two supporting walls, which can not only ensure the stable reciprocating motion of the plunger rod during long-term use, but also can adaptively adjust the acting force between the plunger rod and the body. The greater the external force, the tighter the seal, thereby ensuring safety and stability during long-term use, and ensuring the quality and accuracy of dispensing.

[0021] 2. The dispensing system for two-component glue of the present invention, wherein the guide sleeve for embedding the plunger rod comprises a guide part and a protrusion on the side surface of the left end of the guide part, the protrusion of the guide sleeve is located in the limiting groove of the body, the plunger rod is embedded in the through hole of the guide part, the inner wall of the through hole of the guide part contacts the outer side surface of the plunger rod, and the inner wall surface of the through hole of the guide part is provided with a plurality of small grooves along the axial direction, and the plurality of small grooves are distributed at intervals along the circumferential direction. During the long-term repeated high-speed movement of the plunger rod, on the basis of preventing the plunger rod from shaking and causing accelerated wear of the plunger head, an air cushion can be formed to reduce the friction between the plunger rod and the guide sleeve, and the unilateral contact between the plunger rod and the guide sleeve to form a sealing surface and the unilateral pressure difference can be avoided to aggravate the unilateral wear, and a channel can be provided for debris formed by wear to prevent the debris from wearing and scratching the guide sleeve and the plunger rod, thereby ensuring the stability of glue discharge during long-term use.

[0022] 3. The dispensing system for two-component glue of the present invention has a bubble detection unit installed on each of the A glue guide hose and the B glue guide hose and between the A glue valve body, the B glue valve body and the glue supply mechanism. It also includes a control module for generating a driving signal based on the information on whether there are bubbles in the hose received from each bubble detection unit, and injecting air into the driving cavity through the left air inlet or the right air inlet. This can monitor in real time whether there are bubbles in the glue guide hose during the dispensing process, and can automatically discharge the waste glue with bubbles in the glue guide hose in time. After the waste glue is completely discharged, dispensing can be continued. While ensuring the quality of dispensing, the dispensing efficiency and the quality and efficiency of product processing are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Attachment Figure 1 Schematic diagram of the structure of the dispensing system for two-component glue of the present invention;

[0024] Attachment Figure 2 Schematic diagram of the structure of the bubble detection unit in the dispensing system for two-component glue of the present invention;

[0025] Attachment Figure 3 This is a cross-sectional view of the valve body in the two-component glue dispensing system of the present invention. Figure 1 ;

[0026] Attachment Figure 4 This is a cross-sectional view of the valve body in the two-component glue dispensing system of the present invention. Figure 2 ;

[0027] Attachment Figure 5 This is a schematic diagram of the structure of the sealing ring in the dispensing system for two-component glue of the present invention;

[0028] Attachment Figure 6 This is a cross-sectional view of the structure of the sealing ring in the dispensing system for two-component glue of the present invention;

[0029] Attachment Figure 7 This is a schematic structural diagram of a sealing ring support frame in a two-component glue dispensing system of the present invention;

[0030] Attachment Figure 8 Schematic diagram of the partial structure of the valve body in the two-component glue dispensing system of the present invention Figure 1 ;

[0031] Attachment Figure 9 Schematic diagram of the partial structure of the valve body in the two-component glue dispensing system of the present invention Figure 2 ;

[0032] Attachment Figure 10 The electrical schematic diagram of the dispensing system for the two-component glue of the present invention.

[0033] In the above figures: 1. glue supply mechanism; 2. glue mixing valve; 3. A glue guide hose; 4. B glue guide hose; 5. bubble detection unit; 51. base body; 52. groove; 53. ultrasonic transmitter; 54. ultrasonic receiver; 55. shell; 61. A glue valve body; 62. B glue valve body; 71. A glue discharge hose; 72. B glue discharge hose; 8. waste liquid box; 9. sealing ring; 91. annular base; 92. first sealing lip; 93. second sealing lip; 94. receiving groove; 95. supporting frame; 951. first supporting wall; 952. second supporting wall; 953. inner notch; 954. outer notch; 96. flange; 10. Control module; 11. Main body; 111. Glue supply body; 112. Intermediate body; 113. Driver body; 12. Driver cavity; 131. Glue inlet channel; 132. Glue outlet channel; 133. Glue discharge channel; 13. Glue supply cavity; 14. Intermediate through hole; 15. Plunger rod; 16. First gasket; 17. Plunger head; 18. Flange; 19. Second gasket; 20. Piston disc; 21. Left air inlet; 22. Right air inlet; 23. Guide sleeve; 24. Gap channel; 25. O-ring; 26. One-way valve; 27. Guide ; 28. Raised portion; 29. ​​Limiting groove; 30. Through hole; 31. Small groove. DETAILED DESCRIPTION

[0034] In the description of this patent, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense, for example, to mean a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection, an indirect connection through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this patent in specific circumstances.

[0035] Example 1: A two-component glue dispensing system includes a glue supply mechanism 1 and a glue mixing valve 2. The glue supply mechanism 1 and the glue mixing valve 2 are connected via a glue A guide hose 3 and a glue B guide hose 4 arranged in parallel. The glue A guide hose 3 is mounted with a glue A valve body 61, and the glue B guide hose 4 is mounted with a glue B valve body 62.

[0036] The A glue valve body 61 and the B glue valve body 62 each include a body 11, a drive cavity 12 located at both ends of the body 11, and a glue supply cavity 13 having a glue inlet channel 131, a glue outlet channel 132, and a glue discharge channel 133. The glue inlet channel 131 of the A glue valve body 61 and the B glue valve body 62 is connected to the glue supply mechanism 1 through the A glue guide hose 3 and the B glue guide hose 4. The glue outlet channel 132 of the A glue valve body 61 and the B glue valve body 62 is connected to the glue mixing valve 2 through the A glue guide hose 3 and the B glue guide hose 4. The glue discharge channel 133 of the A glue valve body 61 and the B glue valve body 62 is connected to a waste liquid box 8 through the A glue discharge hose 71 and the B glue discharge hose 72.

[0037] An intermediate through hole 14 is provided between the drive chamber 12 and the glue supply chamber 13. A plunger rod 15 located in the intermediate through hole 14 has its left and right ends located in the drive chamber 12 and the glue supply chamber 13, respectively. A first gasket 16 is installed at one end of the glue discharge passage 133 communicating with the glue supply chamber 13. The left end of the plunger rod 15 has a plunger head 17 that can sealably cooperate with the first gasket 16. A flange portion 18 is provided on the plunger rod 15 near the plunger head 17. A second gasket 19 that can sealably contact the flange portion 18 is installed at one end of the intermediate through hole 14 communicating with the glue supply chamber 13. A gap channel 24 is defined between the plunger rod 15 and the body 11, between the left end of the intermediate through hole 14 and the glue discharge passage 132.

[0038] A piston disc 20 is fixed to the right end of the plunger rod 15, which is sealed with the inner wall of the drive chamber 12. The piston disc 20 is located between the left air inlet 21 and the right air inlet 22. A guide sleeve 23 for the plunger rod 15 to be embedded in is installed in the middle of the plunger rod 15. When the piston disc 20 moves left and right in the drive chamber 12 under the drive of the left air inlet 21 or the right air inlet 22, the plunger head 17 of the plunger rod 15 moves left and right in the glue supply chamber 13 accordingly, so that the plunger head 17 of the plunger rod 15 contacts the first gasket 16 or the flange portion 18 of the plunger rod 15 contacts the second gasket 19.

[0039] A sealing ring 9 is provided between the guide sleeve 23 and the glue outlet channel 132 and the drive chamber 12. The sealing ring 9 is sealed between the plunger rod 15 and the body 11. The sealing ring 9 includes an annular base 91 sleeved on the plunger rod 15, a first sealing lip 92 that seals with the plunger rod 15, and a second sealing lip 93 that is sealed with the body 11. The first sealing lip 92 and the second sealing lip 93 are integrally formed on the same side of the annular base 91 and enclose a receiving groove 94 with the annular base 91. A support frame 95 is provided in the receiving groove 94. The first support wall 951 of the support frame 95 is in surface contact with the first sealing lip 92, and the second support wall 952 of the support frame 95 is in surface contact with the second sealing lip 93. An acute angle is formed between the inclined first support wall 951 and the second support wall 952. The first support wall 951 is provided with a plurality of inner notches 953 extending to the second support wall 952, and the second support wall 952 is provided with a plurality of outer notches 954 extending to the first support wall 951. The inner notches 953 and the outer notches 954 are staggered along the circumferential direction.

[0040] The guide sleeve 23 includes a guide portion 27 and a protrusion 28 located on the side surface of the left end of the guide portion 27. The protrusion 28 of the guide sleeve 23 is located in the limiting groove 29 of the body 11. The plunger rod 15 is embedded in the through hole 30 of the guide portion 27. The inner wall of the through hole 30 of the guide portion 27 contacts the outer side surface of the plunger rod 15. The inner wall surface of the through hole 30 of the guide portion 27 is axially opened with a plurality of small grooves 31, and these plurality of small grooves 31 are distributed at intervals along the circumferential direction.

[0041] The openings of the accommodating grooves 94 on the two sealing rings 9 face the glue outlet channel 132 and the drive chamber 12, respectively. A bubble detection unit 5 is installed on each of the aforementioned glue guide hoses 3 and 4, and is located between the glue valve bodies 61 and 62 and the glue supply mechanism 1. The control module 10 is also included, which is configured to generate a drive signal based on the information received from each bubble detection unit 5 regarding the presence or absence of bubbles in the glue hoses, and to inject gas into the drive chamber 12 through the left air inlet 21 or the right air inlet 22.

[0042] The bubble detection unit 5 includes a base body 51, which has a groove 52 for the hose to be inserted into. An ultrasonic transmitter 53 is provided on one side of the groove 52, and an ultrasonic receiver 54 is provided on the other side.

[0043] A one-way valve 26 is installed on each of the A-glue guide tube 3 and the B-glue guide tube 4, located between the bubble detection unit 5 and the glue supply mechanism 1. This prevents unmonitored bubbles from forming in the area of ​​the guide tube near the mixing valve during glue discharge, which could affect glue discharge quality.

[0044] The bubble detection units 5 on the A rubber guide tube 3 and the B rubber guide tube 4 are both disposed in a housing 55 .

[0045] Example 2: A two-component glue dispensing system includes a glue supply mechanism 1 and a glue mixing valve 2. The glue supply mechanism 1 and the glue mixing valve 2 are connected via a glue A guide hose 3 and a glue B guide hose 4 arranged in parallel. The glue A guide hose 3 is mounted with an glue A valve body 61, and the glue B guide hose 4 is mounted with a glue B valve body 62.

[0046] The A glue valve body 61 and the B glue valve body 62 each include a body 11, a drive cavity 12 located at both ends of the body 11, and a glue supply cavity 13 having a glue inlet channel 131, a glue outlet channel 132, and a glue discharge channel 133. The glue inlet channel 131 of the A glue valve body 61 and the B glue valve body 62 is connected to the glue supply mechanism 1 through the A glue guide hose 3 and the B glue guide hose 4. The glue outlet channel 132 of the A glue valve body 61 and the B glue valve body 62 is connected to the glue mixing valve 2 through the A glue guide hose 3 and the B glue guide hose 4. The glue discharge channel 133 of the A glue valve body 61 and the B glue valve body 62 is connected to a waste liquid box 8 through the A glue discharge hose 71 and the B glue discharge hose 72.

[0047] An intermediate through hole 14 is provided between the drive chamber 12 and the glue supply chamber 13. A plunger rod 15 located in the intermediate through hole 14 has its left and right ends located in the drive chamber 12 and the glue supply chamber 13, respectively. A first gasket 16 is installed at one end of the glue discharge passage 133 communicating with the glue supply chamber 13. The left end of the plunger rod 15 has a plunger head 17 that can sealably cooperate with the first gasket 16. A flange portion 18 is provided on the plunger rod 15 near the plunger head 17. A second gasket 19 that can sealably contact the flange portion 18 is installed at one end of the intermediate through hole 14 communicating with the glue supply chamber 13. A gap channel 24 is defined between the plunger rod 15 and the body 11, between the left end of the intermediate through hole 14 and the glue discharge passage 132.

[0048] A piston disc 20 is fixed to the right end of the plunger rod 15, which is sealed with the inner wall of the drive chamber 12. The piston disc 20 is located between the left air inlet 21 and the right air inlet 22. A guide sleeve 23 for the plunger rod 15 to be embedded in is installed in the middle of the plunger rod 15. When the piston disc 20 moves left and right in the drive chamber 12 under the drive of the left air inlet 21 or the right air inlet 22, the plunger head 17 of the plunger rod 15 moves left and right in the glue supply chamber 13 accordingly, so that the plunger head 17 of the plunger rod 15 contacts the first gasket 16 or the flange portion 18 of the plunger rod 15 contacts the second gasket 19.

[0049] A sealing ring 9 is provided between the guide sleeve 23 and the glue outlet channel 132 and the drive chamber 12. The sealing ring 9 is sealed between the plunger rod 15 and the body 11. The sealing ring 9 includes an annular base 91 sleeved on the plunger rod 15, a first sealing lip 92 that seals with the plunger rod 15, and a second sealing lip 93 that is sealed with the body 11. The first sealing lip 92 and the second sealing lip 93 are integrally formed on the same side of the annular base 91 and enclose a receiving groove 94 with the annular base 91. A support frame 95 is provided in the receiving groove 94. The first support wall 951 of the support frame 95 is in surface contact with the first sealing lip 92, and the second support wall 952 of the support frame 95 is in surface contact with the second sealing lip 93. An acute angle is formed between the inclined first support wall 951 and the second support wall 952. The first support wall 951 is provided with a plurality of inner notches 953 extending to the second support wall 952, and the second support wall 952 is provided with a plurality of outer notches 954 extending to the first support wall 951. The inner notches 953 and the outer notches 954 are staggered along the circumferential direction.

[0050] The guide sleeve 23 includes a guide portion 27 and a protrusion 28 located on the side surface of the left end of the guide portion 27. The protrusion 28 of the guide sleeve 23 is located in the limiting groove 29 of the body 11. The plunger rod 15 is embedded in the through hole 30 of the guide portion 27. The inner wall of the through hole 30 of the guide portion 27 contacts the outer side surface of the plunger rod 15. The inner wall surface of the through hole 30 of the guide portion 27 is axially opened with a plurality of small grooves 31, and these plurality of small grooves 31 are distributed at intervals along the circumferential direction.

[0051] The left air inlet 21 and the right air inlet 22 are connected to a solenoid valve through a vent pipe; the guide sleeve 23 is a brass guide sleeve;

[0052] The thickness of the above-mentioned second support wall 952 is greater than the thickness of the first support wall 951; the relative surfaces of the above-mentioned first support wall 951 and the second support wall 952 have a pair of flange portions 96 arranged opposite to each other, and the end faces of the above-mentioned flange portions 96 are in contact with the end faces of the first support wall 951 and the second support wall 952.

[0053] When the above-mentioned two-component glue dispensing system is used, it can achieve glue mixing and dispensing while facilitating the discharge of waste glue with bubbles in the glue guide tube during the dispensing process, thereby ensuring the quality of the mixed glue and the quality of product processing;

[0054] Furthermore, a sealing ring is provided on each side of the guide sleeve 2, and a support frame is provided in the accommodating groove of the sealing ring. The two support walls of the support frame are in contact with the sealing lip surface, and an acute angle is formed between the first support wall and the second support wall which are arranged obliquely. Notches are staggered on the two support walls, which can ensure the stable reciprocating motion of the plunger rod during long-term use and can adaptively adjust the force between the plunger rod, the plunger rod and the body. The greater the external force, the tighter the seal, which ensures safety and stability during long-term use and ensures the quality and accuracy of dispensing.

[0055] Furthermore, during the dispensing process, it is possible to monitor in real time whether there are bubbles in the glue guide tube, and to automatically discharge the waste glue with bubbles in the glue guide tube in time. After the waste glue is completely discharged, dispensing can be continued. While ensuring the quality of dispensing, the efficiency of dispensing and the quality and efficiency of product processing are improved.

[0056] In addition, on the basis of preventing the plunger rod from shaking and causing accelerated wear of the plunger head, an air cushion can be formed to reduce the friction between the plunger rod and the guide sleeve, and the plunger rod and the guide sleeve can be prevented from unilateral contact to form a sealing surface and a unilateral pressure difference to aggravate unilateral wear. A channel can also be provided for debris formed by wear to avoid wear and scratches on the guide sleeve and the plunger rod by debris, thereby ensuring the stability of glue discharge during long-term use.

[0057] 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 two-component glue dispensing system, comprising a glue supply mechanism and a glue mixing valve, wherein the glue supply mechanism and the glue mixing valve are connected via a glue guide hose A and a glue guide hose B arranged in parallel, characterized in that: A rubber valve body A is installed on the rubber guide hose, and a rubber valve body B is installed on the rubber guide hose; The A and B glue valve bodies each include a body, a drive cavity located at both ends of the body, and a glue supply cavity having a glue inlet channel, a glue outlet channel, and a glue discharge channel. The glue inlet channels of the A and B glue valve bodies are connected to the glue supply mechanism through the A and B glue guide hoses, respectively. The glue outlet channels of the A and B glue valve bodies are connected to the glue mixing valve through the A and B glue guide hoses, respectively. The glue discharge channels of the A and B glue valve bodies are connected to a waste liquid box through the A and B glue discharge hoses. A middle through hole is provided between the driving chamber and the glue supply chamber. The left and right ends of a plunger rod located in the middle through hole are respectively located in the driving chamber and the glue supply chamber. A first gasket is installed at one end of the glue discharge channel communicating with the glue supply chamber. The left end of the plunger rod has a plunger head that can be sealed with the first gasket. A flange portion is provided near the plunger head. A second gasket that can be sealed with the flange portion is installed at one end communicating with the glue supply chamber. A gap channel is provided between the plunger rod and the body between the left end of the middle through hole and the glue discharge channel. A piston disc is fixed to the right end of the plunger rod, which is sealed with the inner wall of the drive chamber. The piston disc is located between the left air inlet and the right air inlet. A guide sleeve for the plunger rod to be embedded in is installed in the middle of the plunger rod. When the piston disc moves left and right in the drive chamber under the drive of the left air inlet or the right air inlet, the plunger head of the plunger rod moves left and right in the glue supply chamber accordingly, so that the plunger head of the plunger rod contacts the first gasket or the flange of the plunger rod contacts the second gasket. A sealing ring is provided between the guide sleeve and the glue outlet channel and the driving cavity, and the sealing ring is sealed and connected between the plunger rod and the body. The sealing ring includes an annular base sleeved on the plunger rod, a first sealing lip sealingly matched with the plunger rod and a second sealing lip sealingly connected to the body. The first sealing lip and the second sealing lip are integrally formed on the same side of the annular base and surround an accommodating groove with the annular base. A supporting frame is provided in the accommodating groove. The first supporting wall of the supporting frame contacts the first sealing lip surface, and the second supporting wall of the supporting frame contacts the second sealing lip surface. An acute angle is formed between the inclined first supporting wall and the second supporting wall. The first supporting wall is provided with a plurality of inner notches extending to the second supporting wall, and the second supporting wall is provided with a plurality of outer notches extending to the first supporting wall. The inner notches and the outer notches are staggered along the circumferential direction. The guide sleeve includes a guide portion and a raised portion on the side surface of the left end of the guide portion. The raised portion of the guide sleeve is located in the limiting groove of the body. The plunger rod is inserted into the through hole of the guide portion. The inner wall of the through hole of the guide portion contacts the outer side of the plunger rod. The inner wall surface of the through hole of the guide portion is provided with a plurality of small grooves along the axial direction. The plurality of small grooves are spaced apart along the circumferential direction. A bubble detection unit is installed on each of the A glue guide hose and the B glue guide hose and between the A glue valve body, the B glue valve body and the glue supply mechanism. It also includes a control module for generating a driving signal based on the information received from each bubble detection unit on whether there are bubbles in the hose, and injecting air into the driving cavity through the left air inlet or the right air inlet.

2. The two-component glue dispensing system according to claim 1, characterized in that: The bubble detection unit comprises a base body, which is provided with a groove for the rubber hose to be embedded in, an ultrasonic transmitter is arranged on one side of the groove, and an ultrasonic receiver is arranged on the other side.

3. The two-component glue dispensing system according to claim 1, characterized in that: A one-way valve is installed on each of the A and B glue guide hoses and is located between the bubble detection unit and the glue supply mechanism.

4. The two-component glue dispensing system according to claim 1, characterized in that: The bubble detection units on the A rubber guide hose and the B rubber guide hose are both arranged in a shell.

5. The two-component glue dispensing system according to claim 1, characterized in that: The openings of the accommodating grooves on the two sealing rings face the glue outlet channel and the driving cavity respectively.

6. The two-component glue dispensing system according to claim 1, characterized in that: The left air inlet and the right air inlet are connected to a solenoid valve through a vent pipe.

7. The two-component glue dispensing system according to claim 1, characterized in that: The guide sleeve is a brass guide sleeve.

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