Back suction type dispensing valve and dispensing device

Abstract

The embodiment of the utility model provides a back-suction type dispensing valve and a dispensing device, and relates to the technical field of gluing. The back-suction type glue dispensing valve comprises a piston cylinder body, piston rods, a valve body and a synchronous blocking piece, the piston cylinder body is provided with at least two mutually independent piston cavities, the multiple piston rods are arranged in the mutually independent piston cavities in a sealed and sliding mode respectively, the valve body is connected with the piston cylinder body, the valve body is provided with a glue injection channel and a glue outlet channel, and the synchronous blocking piece is arranged in the glue injection channel. The glue injection channel and the glue outlet channel are communicated with the piston cavity at the same time, glue is extruded from the glue injection channel through the glue outlet channel through downward sliding movement of the piston rod, glue outlet is achieved, and when the piston rod slides upwards, glue reabsorption is achieved. The synchronous blocking piece is connected with the piston rods at the same time, so that the piston rods move synchronously, the consistency of glue discharging and glue collecting is guaranteed through the piston rods moving synchronously, and the problem of glue coating quality caused by poor glue discharging and glue collecting stability of an existing glue dispensing valve is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of glue coating, in particular to a back-suction type glue dispensing valve and a glue dispensing device. Background Art

[0002] During the battery manufacturing process, the battery cells need to be fixed to the battery cell slots of the module board. The fixing method is mostly glue coating and bonding. An important component for gluing the battery cell slots is the dispensing valve. The dispensing valve is divided into single-liquid dispensing valves and double-liquid dispensing valves. The double-liquid dispensing valve is currently more commonly used. The double-liquid dispensing valve squeezes out AB glue and two-component glue in proportion, and then mixes them before use. The two piston rods of the existing double-liquid dispensing valve that push the glue are driven separately, resulting in poor consistency and stability in the glue discharge and collection. The stability and consistency of the glue discharge and collection will directly affect the quality of the glue coating on the battery cell slots, and thus affect the quality of the connection between the battery cell and the module board. Secondly, the internal sealing of the existing dispensing valve is poor, resulting in uneven glue discharge and untimely glue collection, which seriously affects production. Utility Model Content

[0003] The utility model provides a back-suction type glue dispensing valve and a glue dispensing device, which solve the problem of poor glue dispensing and receiving consistency and stability of the existing double-liquid glue dispensing valve.

[0004] The embodiment of the present utility model can be implemented as follows:

[0005] The embodiment of the present utility model provides a back-suction type dispensing valve, which includes:

[0006] A piston cylinder body, wherein the piston cylinder body is independently provided with a plurality of piston chambers;

[0007] A plurality of piston rods, each of which is sealed and slidably disposed in the piston cavity;

[0008] The valve body is connected to the piston cylinder body, and the valve body is provided with a glue injection channel and a glue discharge channel, and the glue injection channel and the glue discharge channel are simultaneously connected to the piston cavity; and

[0009] A synchronous baffle is connected to multiple piston rods at the same time, so that the multiple piston rods move synchronously.

[0010] Optionally, the dispensing valve further includes a top cover and a bottom cover, the top cover is arranged on a side of the piston cylinder away from the valve body, the bottom cover is arranged on a side of the valve body away from the piston cylinder, and the piston cylinder is connected to the valve body.

[0011] Optionally, the glue dispensing valve also includes a glue control rod, which is composed of a glue guide rod and a glue coating head. The glue guide rod is movably arranged in the glue outlet channel, the upper end of the glue guide rod is connected to multiple piston rods, the glue coating head is connected to the lower end of the glue guide rod, and the glue coating head is located outside the bottom cover.

[0012] Optionally, a glue sealing member is provided in the bottom cover, the glue sealing member is sleeved on the outer side of the glue guiding rod portion, and the glue sealing member is movably connected to the glue applying head.

[0013] Optionally, the plurality of piston rods include a first rod portion, a second rod portion and a piston, both sides of the piston are connected to the first rod portion and the second rod portion respectively, and the second rod portion is located on one side of the valve body;

[0014] An anti-overflow seal is provided on the second rod portion.

[0015] Optionally, the anti-overflow seal includes an anti-overflow base, a pan-seal seal and a first sealing ring. The pan-seal seal is arranged inside the anti-overflow base and connected to the outer wall of the second rod portion. The first sealing ring is sleeved on the outside of the anti-overflow base.

[0016] Optionally, an adjusting member is connected to the end of the first rod portion, and the adjusting member is connected to the synchronous blocking piece.

[0017] Optionally, the dispensing valve further includes a connecting rod, which is simultaneously connected to the piston cylinder, the valve body, the top cover and the bottom cover, so that the piston cylinder, the valve body, the top cover and the bottom cover are integrated.

[0018] Optionally, an air pipe interface is further provided on the piston cylinder body, and the air pipe interface is communicated with the piston cavity.

[0019] An embodiment of the present utility model further provides a glue dispensing device, comprising a solenoid valve, a glue mixer, a glue nozzle and the above-mentioned back-suction type glue dispensing valve.

[0020] The beneficial effects of the back-suction dispensing valve and dispensing device of the embodiment of the utility model include, for example:

[0021] The back-suction type dispensing valve includes a piston cylinder, a piston rod, a valve body and a synchronous baffle. The piston cylinder is independently provided with a plurality of piston cavities, and the plurality of piston rods are respectively sealed and slidably provided in the piston cavities. The valve body is connected to the piston cylinder, and a glue injection channel and a glue discharge channel are provided on the valve body. The glue injection channel and the glue discharge channel are simultaneously communicated with the piston cavity. The glue is squeezed out from the glue injection channel through the glue discharge channel by sliding the plurality of piston rods downward to achieve glue discharge. When the plurality of piston rods slide upward, the glue is back-absorbed. The synchronous baffle is connected to the plurality of piston rods at the same time, so that the plurality of piston rods move synchronously. The synchronously moving plurality of piston rods ensures the consistency of glue discharge and collection, and solves the glue coating quality problem caused by the poor stability of glue discharge and collection in the existing dispensing valve.

[0022] The dispensing device comprises a back-suction dispensing valve, which has all the functions of the back-suction dispensing valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 This is a schematic structural diagram of a back-suction dispensing valve provided in an embodiment of the present utility model;

[0025] Figure 2 This is an axial cross-sectional view of the back-suction type dispensing valve provided in an embodiment of the present utility model;

[0026] Figure 3 This is a schematic diagram of the back-suction dispensing valve provided in an embodiment of the present utility model with the piston cylinder, valve body, top cover and bottom cover hidden;

[0027] Figure 4 A schematic diagram of the internal structure of a back-suction dispensing valve provided in an embodiment of the present utility model;

[0028] Figure 5 This is a schematic structural diagram of the piston-cylinder body provided in an embodiment of the present utility model;

[0029] Figure 6 A perspective schematic diagram of a piston-cylinder body provided in an embodiment of the present utility model;

[0030] Figure 7 This is a first schematic diagram of the structure of the piston rod provided in an embodiment of the present utility model;

[0031] Figure 8 This is a second schematic diagram of the structure of the piston rod provided in an embodiment of the present utility model;

[0032] Figure 9 A schematic structural diagram of an anti-overflow seal provided in an embodiment of the present utility model;

[0033] Figure 10 A schematic structural diagram of a pan-seal seal provided in an embodiment of the present invention;

[0034] Figure 11 This is a schematic structural diagram of a valve body provided in an embodiment of the present utility model;

[0035] Figure 12 A perspective schematic diagram of a valve body provided in an embodiment of the present utility model;

[0036] Figure 13 This is a schematic structural diagram of the glue control rod provided in an embodiment of the present utility model;

[0037] Figure 14 This is a first schematic diagram of the structure of the bottom cover provided in an embodiment of the present utility model;

[0038] Figure 15 This is a second schematic diagram of the structure of the bottom cover provided in an embodiment of the present utility model;

[0039] Figure 16 This is a first schematic diagram of the structure of the top cover provided in an embodiment of the present utility model;

[0040] Figure 17 This is a second schematic diagram of the structure of the top cover provided in an embodiment of the present utility model;

[0041] Figure 18 This is a schematic structural diagram of the dispensing device provided in an embodiment of the present utility model.

[0042] Icons: 1- piston cylinder; 10- piston chamber; 101- first piston chamber; 102- second piston chamber; 11- tracheal interface; 111- first tracheal interface; 112- second tracheal interface; 2- piston rod; 20- first rod portion; 201- first annular groove; 202- limiting step; 21- second rod portion; 211- plug-in hole; 22- piston; 221- second annular groove; 222- third annular groove; 223- gasket; 3- valve body; 30- glue injection channel; 31- glue outlet channel; 32- glue outlet A; 33- glue outlet B; 34- anti-overflow sealing chamber; 4- anti-overflow seal; 40- anti-overflow base; 41 -pan-seal seal; 42-first sealing ring; 5-top cover; 50-cover body; 51-sealing part; 52-axis hole; 53-second sealing ring; 54-third sealing ring; 6-bottom cover; 60-glue sealing groove; 61-glue outlet extension hole; 62-glue sealing part; 7-synchronous baffle; 70-adjusting part; 8-glue control rod; 80-glue guide rod; 81-glue coating head; 9-connecting rod; 1000-intermittent air connector; 2000-continuous air connector; 3000-glue feed A connector; 4000-glue feed B connector; 5000-solenoid valve; 6000-glue mixer; 7000-glue nozzle; 8000-tee connector. DETAILED DESCRIPTION

[0043] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0044] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are intended to fall within the scope of protection of the present invention.

[0045] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0046] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0047] In addition, the terms "first", "second", etc., if used, are merely used to distinguish and describe, and should not be understood as indicating or implying relative importance.

[0048] The terms "comprises," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0049] Unless otherwise expressly specified or limited, terms such as "disposed" and "connected" should be interpreted broadly. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0050] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention can be combined with each other.

[0051] During the battery manufacturing process, battery cells need to be fixed to the cell slots of the module board. This is usually done by gluing and bonding. For example, to fix a lithium iron phosphate cell to the module ABS board, glue is applied to the inner wall of the cell slot on the module ABS board before the lithium iron phosphate cell is inserted. Applying glue to the inner wall of the cell slot requires the use of a dispensing valve. Currently, the most commonly used two-liquid dispensing valve is a two-liquid dispensing valve. However, the two piston rods that push the glue are driven independently, resulting in poor consistency and stability in glue dispensing and collection. Furthermore, the sealing structure within existing dispensing valves is often a fluoropolymer seal. High-frequency piston movement results in poor sealing, leading to uneven glue dispensing and affecting glue dispensing quality. Poor sealing can also cause glue to overflow onto the upper portion of the piston rod. This overflowing glue enters the piston cylinder, clogs the air holes, and damages the entire dispensing valve. Both dispensing valve damage and glue dispensing quality issues can significantly impact production capacity and increase maintenance workload for staff.

[0052] For this purpose, refer to Figures 1 to 18 The back-suction dispensing valve and dispensing device provided in the embodiments of the present invention can solve the above problems.

[0053] The glue dispensing device provided in this embodiment is used for gluing and fixing battery cells, as well as for other scenarios requiring gluing and bonding. The glue dispensing device includes a solenoid valve 5000, a glue mixer 6000, a glue nozzle 7000, and a back-suction glue dispensing valve. The solenoid valve 5000 is connected to the back-suction glue dispensing valve via a pipe to provide power for the back-suction glue dispensing valve to discharge glue. The glue mixer 6000 is used to mix the glue discharged from the back-suction glue dispensing valve. The glue nozzle 7000 is used to apply the mixed glue to the area to be bonded. The back-suction glue dispensing valve controls the glue discharge amount and the glue discharge and collection time.

[0054] The following is a detailed description of the back-suction dispensing valve.

[0055] Please refer to Figures 1 to 4 The back-suction dispensing valve includes a piston cylinder 1, multiple piston rods 2, a valve body 3, and a synchronous baffle 7. The piston cylinder 1 is independently provided with multiple piston chambers 10, and the multiple piston rods 2 are respectively and slidably sealed and disposed in the piston chambers 10. The valve body 3 is connected to the piston cylinder 1 and is provided with a glue injection channel 30 and a glue discharge channel 31. The glue injection channel 30 is used to inject the glue to be mixed, and the glue discharge channel 31 is used to discharge the glue to be mixed. The glue injection channel 30 and the glue discharge channel 31 are simultaneously connected to the piston chamber 10. When the multiple piston rods 2 slide in the piston chamber 10, the amount of glue discharged from the glue discharge channel 31 and the timing of glue discharge and collection are controlled by the movement of the multiple piston rods 2. The synchronous baffle 7 is connected to the multiple piston rods 2, so that the multiple piston rods 2 move synchronously, improving the consistency of glue discharge and collection, thereby improving the quality of glue coating.

[0056] The back-suction dispensing valve in this embodiment is explained by taking the mixing of two-component glue as an example, wherein there are two piston chambers 10 and two piston rods 2. When it is necessary to mix glue of more than two components, this can be achieved by increasing the number of piston chambers 10 and piston rods 2.

[0057] A top cover 5 and a bottom cover 6 are provided on the upper portion of the piston cylinder 1 and the lower portion of the valve body 3, respectively, and a synchronous baffle 7 is located on the upper portion of the top cover 5. Therefore, from top to bottom, the following sequence is the synchronous baffle 7, the top cover 5, the piston cylinder 1, the valve body 3, and the bottom cover 6. To connect and secure the top cover 5, the piston cylinder 1, the valve body 3, and the bottom cover 6 as a whole, connecting holes are provided in the top cover 5, the piston cylinder 1, the valve body 3, and the bottom cover 6. Connecting rods 9 are arranged in the connecting holes to connect the top cover 5, the piston cylinder 1, the valve body 3, and the bottom cover 6 together. If the connecting holes are all threaded holes of equal diameter and corresponding positions, the connecting rod 9 is a threaded rod that is threadedly connected to the top cover 5, the piston cylinder 1, the valve body 3, and the bottom cover 6.

[0058] Specifically, refer to Figure 5 and Figure 6 The piston cylinder 1 is provided with two independent and parallel piston chambers 10, namely a first piston chamber 101 and a second piston chamber 102. A piston rod 2 is independently provided in each of the first piston chamber 101 and the second piston chamber 102. The two independent piston rods 2 and the piston chamber 10 enable the dispensing and collection of two components of glue. The piston chamber 10 is shaped as a cylindrical chamber or a prismatic chamber. For example, in this embodiment, both the first piston chamber 101 and the second piston chamber 102 are configured as cylindrical chambers.

[0059] refer to Figure 7 and Figure 8 The piston rod 2 includes a first rod portion 20, a second rod portion 21 and a piston 22. The piston 22 is cylindrical and has a size smaller than that of the piston chamber 10. The first rod portion 20 and the second rod portion 21 are respectively connected to the two side end surfaces of the piston 22, and the first rod portion 20, the second rod portion 21 and the piston 22 are all coaxial.

[0060] The end of the first rod portion 20 extends to the outside of the top cover 5. Figure 16 and Figure 17The top cover 5 includes a cover body 50 and a sealing portion 51. Both the cover body 50 and the sealing portion 51 of the top cover 5 are provided with an axial hole 52 for the first rod portion 20 to pass through. The first rod portion 20 is connected to the adjusting member 70 after passing through the axial hole 52. It should be noted that the sealing portion 51 of the top cover 5 is provided on one side surface of the cover body 50. The cover body 50 and the sealing portion 51 are integrally formed. The sealing portion 51 is inserted into the piston cavity 10 to seal the piston cavity 10. A second sealing ring 53 is also sleeved on the outer wall of the sealing portion 51, which is used to achieve a sealing arrangement with the piston cavity 10. The first rod portion 20 is also provided with a first annular groove 201, in which a third sealing ring 54 is sleeved to achieve a sealed engagement with the top cover 5. The first rod portion 20 is also provided with a limiting step 202. The synchronous block 7 is sleeved on the first rod portion 20 and is engaged on one side of the limiting step 202. The limiting step 202 cooperates with an adjusting member 70 connected to the first rod portion 20 to limit the position of the synchronous block 7. Optionally, the adjusting member 70 is a nut with one end closed. The outer wall of the first rod portion 20 near the end is provided with threads, and the nut and the first rod portion 20 are threadedly connected.

[0061] The piston 22 is slidably arranged in the piston chamber 10. In order to prevent air leakage, a second annular groove 221 and a third annular groove 222 are provided on the circumferential outer wall of the piston 22. A gasket 223 is provided in the second annular groove 221 and the third annular groove 222 to achieve a sealed connection with the piston chamber 10.

[0062] A spill-proof sealing chamber 34 is also provided below the piston chamber 10. The upper half of the spill-proof sealing chamber 34 is located on the piston cylinder 1, and the lower half of the spill-proof sealing chamber 34 is located on the valve body 3. The upper and lower halves of the spill-proof sealing chamber 34 together constitute the spill-proof sealing chamber 34. A glue outlet channel 31 is provided on the valve body 3, running through the valve body 3. The glue outlet channel 31 is located below and communicates with the spill-proof sealing chamber 34. One end of the second rod portion 21 is connected to the piston 22, and the other end passes through the piston cylinder 1 and extends into the glue outlet channel 31. The spill-proof sealing chamber 34 is provided to accommodate the spill-proof seal 4, which prevents glue from overflowing from the glue outlet channel 31 along with the second rod portion 21 into the piston chamber 10 above, thereby preventing blockage of the piston chamber 10.

[0063] Optional, reference Figure 9 and Figure 10The overflow seal 4 includes an overflow base 40, a diaphragm seal 41, and a first sealing ring 42. The diaphragm seal 41 is disposed within the overflow base 40 and abuts the outer wall of the second rod portion 21. The first sealing ring 42 is sleeved onto the exterior of the overflow base 40. The diaphragm seal 41 prevents glue from entering the piston chamber 10, while the first sealing ring 42 seals the overflow base 40 from the overflow sealing chamber 34. The diaphragm seal 41 is a high-performance U-shaped Teflon seal with a special internal spring. It maintains durability and stability under the high-intensity and high-frequency movement of the piston 22, achieving a good seal. The sealing principle of the diaphragm seal 41 is conventional and will not be described in detail.

[0064] refer to Figure 11 and Figure 12 The valve body 3 is also provided with a glue injection channel 30, which communicates with a glue outlet channel 31. Glue flows from the injection channel 30 into the outlet channel 31. Glue feed connectors, including a glue feed connector A 3000 and a glue feed connector B 4000, are connected to the glue injection channel 30, enabling the delivery of two types of glue. The ends of the glue outlet channel 31 are glue outlets, including a glue outlet A 32 and a glue outlet B 33.

[0065] The glue outlet channel 31 is also provided with a glue control rod 8, which can accurately control the glue outlet amount and the glue outlet and collection time. Figure 13 The glue control rod 8 includes a glue guiding rod portion 80 and a glue applying head portion 81 . One end of the glue guiding rod portion 80 is inserted into the insertion hole 211 of the second rod portion 21 , and the other end is fixedly connected to the glue applying head portion 81 . The glue applying head portion 81 is located outside the valve body 3 .

[0066] Of course, in this embodiment, a bottom cover 6 is provided at the lower portion of the valve body 3 , and therefore, the glue applying head 81 is located outside the bottom cover 6 to facilitate the glue applying operation.

[0067] refer to Figure 14 and Figure 15 The bottom cover 6 is provided with a sealing groove 60 and a glue outlet extension hole 61. The glue guide rod 80 passes through the sealing groove 60 and the glue outlet extension hole 61 in sequence. The glue outlet extension hole 61 serves as an extension of the glue outlet channel 31 on the valve body 3, and is used to guide the glue in the glue outlet channel 31 on the valve body 3 to the outside of the bottom cover 6 and distribute it on the glue application head 81 for application. A sealing member 62 is provided in the sealing groove 60. When glue application needs to be stopped, the sealing member 62 cooperates with the glue application head 81 to quickly stop glue application, avoiding glue leakage and stringing.

[0068] Furthermore, the sealing member 62 and the glue control rod 8 are both made of metal, such as copper, iron, aluminum, aluminum alloy, alloy steel, etc. The metal sealing member 62 and the glue control rod 8 have better wear resistance, greatly enhance the sealing performance and service life, and are conducive to ensuring the accuracy of the glue stopping moment.

[0069] In addition, since the dispensing valve in this embodiment operates on the back-suction principle, an air pipe interface 11 is also provided on the piston cylinder body 1. The air pipe interface 11 is connected to the piston cavity 10. Air is injected or extracted into the piston cavity 10 through the air pipe interface 11 to drive the piston 22 to move, thereby completing the glue discharging and collecting actions. The trachea interface 11 connected to each piston chamber 10 includes a first trachea interface 111 and a second trachea interface 112. The first trachea interface 111 is located above the upper limit of the upward movement stroke of the piston 22, and the second trachea interface 112 is located below the first trachea interface 111. The first trachea interface 111 is connected to the intermittent air joint 1000, and the second trachea interface 112 is connected to the continuous air joint 2000; when compressed air is injected from the continuous air joint 2000 into the piston chamber 10, the piston 22 is pushed to move upward to realize glue collection. When compressed air is injected from the intermittent air joint 1000 into the piston chamber 10, the piston 22 is pushed downward to realize glue discharge. The cooperation between the first trachea interface 111 and the second trachea interface 112 realizes the stable movement of the piston 22.

[0070] The working principle of the back-suction dispensing valve provided in this embodiment is as follows:

[0071] After the compressed air enters the piston chamber 10 from the first air pipe interface 111, it pushes the piston 22 downward, and the second rod portion 21 connected to the piston 22 also moves downward. The second rod portion 21 pushes the glue control rod 8 connected thereto to move downward, and the glue coating head 81 of the glue control rod 8 is separated from the glue sealing part 62, and the glue flows out from the glue injection channel 30 through the glue outlet channel 31; when the compressed air at the first air pipe interface 111 stops being input and compressed air is input from the second air pipe interface 112 at the same time, the piston 22 moves upward, thereby driving the glue control rod 8 to move upward, and the glue coating head 81 is connected to the glue sealing part 62 to achieve glue resorption.

[0072] An embodiment of the present invention also provides a dispensing device, including the above-mentioned back-suction dispensing valve, and also including a solenoid valve 5000, a glue mixer 6000, and a glue nozzle 7000. The solenoid valve 5000 is connected to the dispensing valve through a pipeline and a three-way connector 8000. The solenoid valve 5000 is also connected to an air supply device. The air supply device inputs compressed air into the piston chamber 10 through the solenoid valve 5000, the three-way connector 8000 and the pipeline to achieve up and down movement control of the piston 22. The glue mixer 6000 is used to mix the glue discharged from the glue outlet channel 31 to form a mixed glue that meets the use requirements. The glue nozzle 7000 is connected to the glue mixer 6000 and is used to apply the mixed glue to the part that needs to be glued. For specific diagrams, please refer to Figure 18 The solenoid valve 5000 controls the duration of air intake, thereby controlling the movement stroke of the piston 22 and ultimately controlling the amount of glue discharged. Since the solenoid valve 5000, glue mixer 6000 and glue nozzle 7000 are all existing technologies, their working principles and structures will not be described in detail.

[0073] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A back-suction dispensing valve, characterized in that: include: A piston cylinder (1), wherein the piston cylinder (1) is independently provided with a plurality of piston chambers (10); A plurality of piston rods (2), each of the plurality of piston rods (2) being sealed and slidably disposed in the piston cavity (10); A valve body (3), the valve body (3) being connected to the piston cylinder (1), the valve body (3) being provided with a glue injection channel (30) and a glue discharge channel (31), the glue injection channel (30) and the glue discharge channel (31) being simultaneously connected to the piston chamber (10); and A synchronous baffle (7) is connected to the multiple piston rods (2) at the same time, so that the multiple piston rods (2) move synchronously.

2. The back-suction dispensing valve according to claim 1, characterized in that: The dispensing valve further comprises a top cover (5) and a bottom cover (6), wherein the top cover (5) is arranged on a side of the piston cylinder (1) away from the valve body (3), and the bottom cover (6) is arranged on a side of the valve body (3) away from the piston cylinder (1), and the piston cylinder (1) is connected to the valve body (3).

3. The back-suction dispensing valve according to claim 2, characterized in that: The dispensing valve further comprises a glue control rod (8), the glue control rod (8) being composed of a glue guide rod portion (80) and a glue coating head portion (81), the glue guide rod portion (80) being movably arranged in the glue outlet channel (31), the upper end of the glue guide rod portion (80) being connected to the plurality of piston rods (2), the glue coating head portion (81) being connected to the lower end of the glue guide rod portion (80), and the glue coating head portion (81) being located outside the bottom cover (6).

4. The back-suction dispensing valve according to claim 3, characterized in that: A glue sealing member (62) is provided in the bottom cover (6), and the glue sealing member (62) is sleeved on the outside of the glue guiding rod (80), and the glue sealing member (62) is movably connected to the glue coating head (81).

5. The back-suction dispensing valve according to claim 1, characterized in that: The multiple piston rods (2) include a first rod portion (20), a second rod portion (21) and a piston (22), the two sides of the piston (22) are respectively connected to the first rod portion (20) and the second rod portion (21), and the second rod portion (21) is located on one side of the valve body (3); An anti-overflow seal (4) is provided on the second rod portion (21).

6. The back-suction dispensing valve according to claim 5, characterized in that: The anti-overflow seal (4) comprises an anti-overflow base (40), a pan-seal seal (41) and a first sealing ring (42); the pan-seal seal (41) is arranged inside the anti-overflow base (40) and connected to the outer wall of the second rod (21); and the first sealing ring (42) is sleeved on the outside of the anti-overflow base (40).

7. The back-suction dispensing valve according to claim 5, characterized in that: An adjusting member (70) is connected to the end of the first rod portion (20), and the adjusting member (70) is connected to the synchronous blocking piece (7).

8. The back-suction dispensing valve according to claim 2, characterized in that: The dispensing valve further comprises a connecting rod (9), which is simultaneously connected to the piston cylinder (1), the valve body (3), the top cover (5) and the bottom cover (6), so that the piston cylinder (1), the valve body (3), the top cover (5) and the bottom cover (6) are integrated.

9. The back-suction dispensing valve according to any one of claims 1 to 8, characterized in that: The piston cylinder body (1) is also provided with an air pipe interface (11), and the air pipe interface (11) is communicated with the piston chamber (10).

10. A dispensing device, characterized in that: include: A solenoid valve (5000), a glue mixer (6000), a glue nozzle (7000), and a back-suction type glue dispensing valve as claimed in claim 9.

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