Dispensing valve and dispensing equipment

Abstract

The utility model is applicable to the technical field of dispensing, and provides a dispensing valve and dispensing equipment, the dispensing valve comprises a valve main body, a glue solution driving piece and a movable piece, the dispensing equipment comprises a bracket and a glue supply part, and further comprises the dispensing valve. Compared with a dispensing valve in the prior art, after dispensing is completed, the movable part can be driven to the closed position through the driving structure, at the moment, the glue liquid driving part abuts against the movable part at intervals, the first opening, communicated with the glue supply cavity, of the connecting channel is blocked by the glue liquid driving part, and the connecting channel is blocked; and the glue solution in the glue supply cavity cannot enter the glue outlet cavity through the connecting channel, so that the glue solution can be prevented from leaking from the glue outlet of the glue outlet cavity, and the glue dispensing precision and the glue dispensing effect are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of dispensing, and particularly relates to a dispensing valve and a dispensing device. Background Art

[0002] Dispensing is a process step required in fields such as mobile phone manufacturing, semiconductors, PCB (Printed Circuit Board) manufacturing, and SMT (Surface Mount Technology) manufacturing. Dispensing is usually carried out using a dispensing device, and the dispensing valve is a component on the dispensing device used to control the ejection and stop of the adhesive. However, most of the existing dispensing valves currently in use have the problem of glue leakage after dispensing is completed, which seriously affects the accuracy and effect of dispensing. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a dispensing valve and a dispensing device, aiming to solve the technical problem of glue leakage in the existing dispensing valve after dispensing is completed.

[0004] The utility model is implemented as follows. In the first aspect, a dispensing valve is provided, including:

[0005] A valve body having a glue supply chamber and a glue outlet chamber, and the glue outlet chamber has a glue outlet;

[0006] A glue driving member movably arranged in the glue supply chamber for driving the movement of the glue;

[0007] A movable member movably arranged in the valve body. The movable member has a first part and a second part connected to the first part. At least part of the first part is located in the glue supply chamber and is sealingly connected to the inner wall of the glue supply chamber. At least part of the second part is located in the glue outlet chamber and is sealingly connected to the inner wall of the glue outlet chamber. The movable member has a connection channel that penetrates the first part and the second part. The movable member can move between a dispensing position and a closed position. When the movable member is in the dispensing position, the movable member is spaced apart from the glue driving member, and the glue supply chamber and the glue outlet chamber are communicated through the connection channel. When the movable member is in the closed position, the movable member abuts against the glue driving member, and a first opening of the connection channel is blocked by the glue driving member. The first opening is a port where the connection channel communicates with the glue supply chamber;

[0008] A driving structure arranged on the valve body, and the driving structure is used to drive the movable member to move between the dispensing position and the closed position.

[0009] In an alternative embodiment, the glue supply chamber and the glue discharge chamber are spaced apart, and the first part and the second part are also spaced apart. The movable member further includes a third part, which is located between the first part and the second part and connects the first part and the second part. At least a part of the third part is in contact with the driving structure.

[0010] In an alternative embodiment, the driving structure includes a piston chamber, which is located between the glue supply chamber and the glue discharge chamber, communicates with the glue supply chamber and the glue discharge chamber, the third part is located in the piston chamber, and the third part is in sealed contact with the inner wall of the piston chamber, dividing the piston chamber into a non-communicating first sealed chamber and a second sealed chamber. The first sealed chamber is used to communicate with an external air source, and the second sealed chamber is also used to communicate with an external air source.

[0011] In an alternative embodiment, a first connection hole and a second connection hole are respectively provided on the valve body. The first end of the first connection hole communicates with the first sealed chamber, the second end of the first connection hole is used to communicate with an external air source, and the first end of the second connection hole communicates with the second sealed chamber, and the second end of the second connection hole is used to communicate with an external air source.

[0012] In an alternative embodiment, the second ends of the first connection hole and the second connection hole are both located on the same side surface of the valve body.

[0013] In an alternative embodiment, a first sealing member is provided between the first part and the inner wall of the glue supply chamber, a second sealing member is provided between the second part and the inner wall of the glue discharge chamber, and a third sealing member is provided between the third part and the inner wall of the piston chamber.

[0014] In an alternative embodiment, the glue driving member includes a driving screw, which has a degree of freedom of self-rotation about its own axis relative to the valve body. A spiral structure is provided on the outer wall of the driving screw, and the spiral structure and the inner wall of the glue supply chamber form a spiral channel for accommodating the glue. The spiral structure is used to push the glue to move along the axial direction of the driving screw through the spiral channel when the driving screw rotates.

[0015] In an alternative embodiment, a pointed end is provided at the end of the driving screw facing the movable member. When the movable member is in the closed position, the end of the pointed end is inserted into the first opening of the connection channel, and the surface of the pointed end abuts against the first opening.

[0016] In an alternative embodiment, the cross-section of the first part is a first cross-section, the cross-section of the second part is a second cross-section, and the areas of the first cross-section and the second cross-section are equal.

[0017] In a second aspect, a dispensing device is provided, including a bracket and a glue supply part, and further including the dispensing valve described in any one of the above. The glue supply part and the dispensing valve are connected to the bracket, and the outlet of the glue supply part communicates with the glue supply cavity.

[0018] The technical effect of the first aspect of the present utility model is as follows: A glue driving member is movably arranged in the glue supply cavity of the valve body, and a movable member is movably arranged in the valve body. At least part of the first part of the movable member is located in the glue supply cavity and is hermetically connected to the inner wall of the glue supply cavity, and at least another part of the second part is located in the glue outlet cavity and is hermetically connected to the inner wall of the glue outlet cavity. The movable member also has a connection channel penetrating through the first part and the second part. At the same time, the movable member can be driven by a driving structure to move between a dispensing position and a closed position. Compared with the dispensing valve in the prior art, when performing dispensing work, the movable member can be driven by the driving structure to the dispensing position. At this time, the glue driving member and the movable member are arranged at intervals, and the glue supply cavity and the glue outlet cavity are communicated through the connection channel. The glue can be driven by the glue driving member to enter the glue outlet cavity from the glue supply cavity through the connection channel, and finally be discharged to the outside of the valve body from the glue outlet for dispensing. After the dispensing is completed, the movable member can be driven by the driving structure to the closed position. At this time, the glue driving member and the movable member are in contact with each other at intervals, and the first opening of the connection channel communicating with the glue supply cavity is blocked by the glue driving member, and the connection channel is blocked so that the glue in the glue supply cavity cannot enter the glue outlet cavity through the connection channel, thereby avoiding the leakage of glue from the glue outlet of the glue outlet cavity, and thus improving the dispensing accuracy and the dispensing effect.

[0019] It can be understood that the beneficial effects of the second aspect can refer to the relevant descriptions in the first aspect above, and will not be repeated here. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments of the present utility model or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 is a cross-sectional structural view of the dispensing valve provided by the embodiment of the present utility model;

[0022] Figure 2 is a cross-sectional structural view of the dispensing valve provided by the embodiment of the present utility model when the movable member is in the dispensing position;

[0023] Figure 3 It is a schematic cross-sectional structure diagram of the dispensing valve provided by the embodiment of the present utility model when the moving part is in the closed position;

[0024] Figure 4 It is a schematic structural diagram of the dispensing device provided by the embodiment of the present utility model.

[0025] Explanation of reference numerals:

[0026] 1. Valve body; 11. Piston chamber; 111. First sealed chamber; 112. Second sealed chamber; 12. Glue supply chamber; 13. Glue outlet chamber; 14. Glue outlet; 15. First connection hole; 16. Second connection hole; 2. Glue liquid driving part; 21. Driving screw; 22. Tip part; 3. Moving part; 31. First part; 32. Second part; 33. Third part; 34. Connection channel; 341. First opening; 342. Second opening; 4. Spiral channel; 5. First seal; 6. Second seal; 7. Third seal; 8. Bracket; 9. Glue supply part. Detailed implementation manners

[0027] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation to the present utility model.

[0028] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0029] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more unless otherwise specifically defined.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0032] Please refer to Figures 1 to 3 As shown, in the embodiment of the utility model, in the first aspect, a dispensing valve is provided, which includes a valve body 1, a glue driving member 2 and a movable member 3. The valve body 1 has a glue supply cavity 12 and a glue outlet cavity 13, and the glue outlet cavity 13 has a glue outlet 14. The glue driving member 2 is movably arranged in the glue supply cavity 12, and is used to drive the glue to move. The movable member 3 is movably arranged in the valve body 1. The movable member 3 has a first part 31 and a second part 32 connected to the first part 31. At least part of the first part 31 is located in the glue supply cavity 12 and is sealed with the inner wall of the glue supply cavity 12. At least another part of the second part 32 is located in the glue discharge cavity 13 and is sealed with the inner wall of the glue discharge cavity 13. The movable member 3 also has a connecting channel 34. The connecting channel 34 runs through the first part 31 and the second part 32. The movable member 3 can move between a dispensing position and a closed position. When the movable member 3 is located at the dispensing position, the glue driving member 2 is spaced apart from the movable member 3, and the glue supply cavity 12 and the glue discharge cavity 13 are connected through the connecting channel 34. When the movable member 3 is located at the closed position, the glue driving member 2 abuts against the movable member 3 at a distance, and a first opening 341 of the connecting channel 34 is blocked by the glue driving member 2. The first opening 341 is a port for connecting the connecting channel 34 to the glue supply cavity 12. The driving structure is arranged on the valve body 1, and is used to drive the movable part 3 to move between the dispensing position and the closing position.

[0033] Specifically, the valve body 1 refers to a shell-shaped component with a certain internal space, and the glue supply cavity 12 and the glue outlet cavity 13 are both cavity structures arranged on the valve body 1 and have a certain volume. The glue supply cavity 12 can contain glue and is connected to the glue supply part 9, and the glue outlet cavity 13 can contain glue and the glue can be discharged to the outside of the valve body 1 through the glue outlet 14. The glue driving member 2 refers to a component with a certain volume, and the glue driving member 2 can be columnar, rod-shaped or block-shaped, and the glue driving member 2 can also be a threaded rod, etc. The glue driving member 2 can drive the glue to move by its own movement, wherein the movement mode of the glue driving member 2 can be rotation, sliding or swinging, etc.

[0034] The movable member 3 refers to a component with a certain volume. The movable member 3 may include a first part 31 and a second part 32, and the movable member 3 may also include other parts in addition to the first part 31 and the second part 32. The movable member 3 is capable of moving between a dispensing position and a closed position, where the dispensing position and the closed position refer to two position states of the movable member 3 during movement. The connection channel 34 is a channel structure provided on the movable member 3, and the connection channel 34 penetrates through the first part 31 and the second part 32, forming a channel with a certain length between the first part 31 and the second part 32.

[0035] The driving structure refers to a structure or component that can drive an object to move. The driving structure can be driven in the way of mechanical components, such as a threaded screw structure, a lever structure, a cylinder structure or a hydraulic cylinder, etc. Of course, the driving structure can also use other ways to drive the movable member 3 to move, which will not be elaborated here.

[0036] In the dispensing valve provided by the embodiment of the present utility model, a glue driving member 2 is movably arranged in the glue supply cavity 12 of the valve body 1, and a movable member 3 is movably arranged in the valve body 1. At least a part of the first part 31 of the movable member 3 is located in the glue supply cavity 12 and is hermetically connected to the inner wall of the glue supply cavity 12, and at least another part of the second part 32 is located in the glue outlet cavity 13 and is hermetically connected to the inner wall of the glue outlet cavity 13. The movable member 3 also has a connection channel 34 that penetrates through the first part 31 and the second part 32. At the same time, the movable member 3 can be driven to move between a dispensing position and a closed position by a driving structure. Compared with the dispensing valve in the prior art, when dispensing work is carried out, the movable member 3 can be driven to the dispensing position by the driving structure. At this time, the glue driving member 2 and the movable member 3 are arranged at intervals, and the glue supply cavity 12 and the glue outlet cavity 13 are communicated through the connection channel 34. The glue can be driven by the glue driving member 2 to enter the glue outlet cavity 13 from the glue supply cavity 12 through the connection channel 34, and finally be discharged to the outside of the valve body 1 from the glue outlet 14 for dispensing. After the dispensing is completed, the movable member 3 can be driven to the closed position by the driving structure. At this time, the glue driving member 2 abuts against the movable member 3, and the first opening 341 of the connection channel 34 communicating with the glue supply cavity 12 is blocked by the glue driving member 2, and the glue in the glue supply cavity 12 cannot enter the glue outlet cavity 13 through the connection channel 34, thereby avoiding glue leakage from the glue outlet 14 of the glue outlet cavity 13, and improving the dispensing accuracy and the dispensing effect.

[0037] In one embodiment, please refer to Figures 1 to 3, the glue supply cavity 12 and the glue outlet cavity 13 are arranged at intervals, and the first part 31 and the second part 32 are also arranged at intervals. The movable member 3 further includes a third part 33. The third part 33 is located between the first part 31 and the second part 32 and connects the first part 31 and the second part 32. At least part of the third part 33 is in contact with the driving structure. Specifically, the first part 31, the second part 32, and the third part 33 refer to the parts of the movable member 3. The third part 33 connects the first part 31 and the second part 32. At this time, the connection channel 34 is arranged through the first part 31, the second part 32, and the third part 33, so that the entire connection channel 34 remains unblocked. The first part 31, the second part 32, and the third part 33 can be a split structure or an integral structure. When the first part 31, the second part 32, and the third part 33 are of an integral structure, the movable member 3 can be made by casting, die-casting, or machining. By arranging the glue supply cavity 12 and the glue outlet cavity 13 at intervals, and arranging the third part 33 between the first part 31 and the second part 32, and at least part of the third part 33 is in contact with the driving structure, it is more convenient for the driving structure to drive the entire movable member 3 without affecting the sealed connection between the first part 31 and the inner wall of the glue outlet cavity 13 and the sealed connection between the second part 32 and the inner wall of the glue outlet cavity 13, and the internal structure of the valve body 1 is also more reasonably arranged.

[0038] In an alternative embodiment, please refer to Figures 1 to 3 , the first part 31, the second part 32, and the third part 33 are all cylindrical structures, and the first part 31, the second part 32, and the third part 33 are coaxially arranged. The connection channel 34 can be arranged along the axis of the first part 31. At the same time, the cross-section of the part of the glue supply cavity 12 that is sealingly fitted with the first part 31 is circular, and the cross-section of the part of the glue outlet cavity 13 that is sealingly fitted with the second part 32 is circular. By arranging the first part 31, the second part 32, and the third part 33 as cylindrical structures, and the connection channel 34 can be arranged along the axis of the first part 31, it is more convenient to process and manufacture the movable member 3.

[0039] In an embodiment, please refer to Figures 1 to 3 , the driving structure includes a piston cavity 11. The piston cavity 11 is located between the glue supply cavity 12 and the glue outlet cavity 13 and is communicated with the glue supply cavity 12 and the glue outlet cavity 13. The third part 33 is located in the piston cavity 11, and the third part 33 is in sealing contact with the inner wall of the piston cavity 11 and divides the piston cavity 11 into a non-communicating first sealed cavity 111 and a second sealed cavity 112. The first sealed cavity 111 is used to communicate with an external air source, and the second sealed cavity 112 is also used to communicate with an external air source.

[0040] Specifically, the piston chamber 11 refers to a containing structure with a certain volume. The piston chamber 11 is located between the glue supply chamber 12 and the glue outlet chamber 13 and is in communication with the glue supply chamber 12 and the glue outlet chamber 13. This allows the first part 31 and the second part 32 to be connected to the third part 33 while also having parts extending into the glue supply chamber 12 and the glue outlet chamber 13 respectively. By arranging the third part 33 inside the piston chamber 11, with the third part 33 in sealed contact with the inner wall of the piston chamber 11, the piston chamber 11 is divided into a non-communicating first sealed chamber 111 and second sealed chamber 112, and both the first sealed chamber 111 and the second sealed chamber 112 are in communication with an external air source. Among them, the first sealed chamber 111 can be located on the side of the third part 33 facing the glue supply chamber 12, and the second sealed chamber 112 can be located on the side of the third part 33 facing away from the glue supply chamber 12.

[0041] When it is necessary to push the movable part 3 to the dispensing position, gas can be filled into the first sealed chamber 111, and the gas flow direction is as shown by the arrow A in Figure 2 . This increases the air pressure in the first sealed chamber 111 and makes it greater than the air pressure in the second sealed chamber 112, thereby pushing the third part 33 to move away from the glue driving part 2, so that the glue driving part 2 and the movable part 3 are arranged at an interval, and the glue supply chamber 12 and the glue outlet chamber 13 are in communication through the connection channel 34. When it is necessary to push the movable part 3 to the closed position, gas can be filled into the second sealed chamber 112, and the gas flow direction is as shown by the arrow B in Figure 3 . This increases the air pressure in the second sealed chamber 112 and makes it greater than the air pressure in the first sealed chamber 111, thereby pushing the third part 33 to move closer to the glue driving part 2. The glue driving part 2 and the movable part 3 are in contact with each other at an interval, and the first opening 341 of the connection channel 34 is blocked by the glue driving part 2 to prevent glue leakage after dispensing.

[0042] The driving structure adopts the method of mutual cooperation between the piston chamber 11 and the external air source, which can make the structure of the driving structure simpler and also make it more convenient and rapid for the driving structure to drive the movable part 3 to move.

[0043] Based on the above-described piston chamber 11 feature, please refer to Figures 1 to 3, a first connection hole 15 and a second connection hole 16 are respectively provided on the valve body 1. The first end of the first connection hole 15 communicates with the first sealed cavity 111, the second end of the first connection hole 15 is used to communicate with an external air source, and the first end of the second connection hole 16 communicates with the second sealed cavity 112, and the second end of the second connection hole 16 is used to communicate with an external air source. Specifically, both the first connection hole 15 and the second connection hole 16 are hole structures with both ends open. By connecting the first end of the first connection hole 15 to the first sealed cavity 111 and using the second end of the first connection hole 15 to communicate with an external air source, it is more convenient to connect the first sealed cavity 111 with the external air source. By connecting the first end of the second connection hole 16 to the second sealed cavity 112 and using the second end of the second connection hole 16 to communicate with an external air source, it is more convenient to connect the second sealed cavity 112 with the external air source.

[0044] In one embodiment, please refer to Figures 1 to 3 , the second ends of both the first connection hole 15 and the second connection hole 16 are located on the same side of the valve body 1. Specifically, by arranging the second ends of both the first connection hole 15 and the second connection hole 16 on the same side of the valve body 1, the pipelines communicating with the first sealed cavity 111 and the second sealed cavity 112 can be located on the same side of the valve body 1, making the appearance of the valve body 1 more concise.

[0045] In one embodiment, please refer to Figures 1 to 3 , a first seal 5 is provided between the first part 31 and the inner wall of the glue supply cavity 12, a second seal 6 is provided between the second part 32 and the inner wall of the glue outlet cavity 13, and a third seal 7 is provided between the third part 33 and the inner wall of the piston cavity 11. Specifically, the first seal 5, the second seal 6, and the third seal 7 all refer to components for sealing, and the first seal 5, the second seal 6, and the third seal 7 can be made of materials such as rubber and silica gel. By providing a first seal 5 between the first part 31 and the inner wall of the glue supply cavity 12, the sealing performance between the first part 31 and the inner wall of the glue supply cavity 12 can be better. By providing a second seal 6 between the second part 32 and the inner wall of the glue outlet cavity 13, the sealing performance between the second part 32 and the inner wall of the glue outlet cavity 13 can be better. By providing a third seal 7 between the third part 33 and the inner wall of the piston cavity 11, the sealing performance between the third part 33 and the inner wall of the piston cavity 11 can be better. Through the arrangement of the first seal 5, the second seal 6, and the third seal 7, the sealing performance of the installation of the movable part 3 inside the valve body 1 is improved.

[0046] In an alternative embodiment, please refer to Figures 1 to 3, the first seal 5, the second seal 6, and the third seal 7 are all sealing rings. Among them, the first seal 5 is sleeved on the circumference of the first part 31, and an annular groove for accommodating the first seal 5 can be provided on the outer wall of the first part 31. The second seal 6 is sleeved on the circumference of the second part 32, and an annular groove for accommodating the second seal 6 can be provided on the outer wall of the second part 32. The third seal 7 is sleeved on the circumference of the third part 33, and an annular groove for accommodating the third seal 7 can be provided on the outer wall of the third part 33, which can make the installation of the first seal 5, the second seal 6, and the third seal 7 more firm and also make the sealing performance of each part of the movable part 3 in the valve body 1 better.

[0047] In one embodiment, please refer to Figures 1 to 3 , the glue driving member 2 includes a driving screw 21. The driving screw 21 has a degree of freedom of self-rotation around its own axis relative to the valve body 1. A spiral structure is provided on the outer wall of the driving screw 21. The spiral structure and the inner wall of the glue supply cavity 12 form a spiral channel 4 for accommodating the glue. The spiral structure is used to push the glue along the axial direction of the driving screw 21 through the spiral channel 4 when the driving screw 21 rotates. Specifically, the driving screw 21 refers to a rod-shaped member with a certain length, and a spiral structure is provided on the outer wall of the driving screw 21. The spiral structure is usually a thread or a spiral groove, etc. By forming a spiral channel 4 for accommodating the glue with the inner wall of the glue supply cavity 12, the glue can be pushed along the axial direction of the driving screw 21 through the spiral structure when the driving screw 21 rotates, so as to achieve the purpose of driving the glue movement and make the driving of the glue more convenient.

[0048] In one embodiment, please refer to Figures 1 to 3 , a pointed end portion 22 is provided at the end of the driving screw 21 facing the movable part 3. When the movable part 3 is in the closed position, the end of the pointed end portion 22 is inserted into the first opening 341 of the connecting channel 34, and the surface of the pointed end portion 22 abuts against the first opening 341. Specifically, the pointed end portion 22 refers to a member with a gradually decreasing cross-section. By providing the pointed end portion 22 at the end of the driving screw 21 facing the movable part 3, when the driving screw 21 abuts against the first part 31 of the movable part 3, the end of the pointed end portion 22 can be inserted into the first opening 341 of the connecting channel 34, and the surface of the pointed end portion 22 abuts against the first opening 341, so as to make the sealing performance at the first opening 341 of the connecting channel 34 better.

[0049] In one embodiment, please refer to Figures 1 to 3, the cross section of the first part 31 is the first cross section, the cross section of the second part 32 is the second cross section, and the areas of the first cross section and the second cross section are equal. Specifically, the cross section of the part of the glue supply cavity 12 that matches the first part 31 is adapted to the cross section of the first part 31, and the cross section of the part of the glue outlet cavity 13 that matches the second part 32 is adapted to the cross section of the second part 32. And the areas of the first cross section and the second cross section are equal. Figure 2 and Figure 3 As shown, the area of ​​the first cross section is D1, and the area of ​​the second cross section is D2. The distance when the movable part 3 moves from the dispensing position to the closed position is H. Therefore, when the movable part 3 moves from the dispensing position to the closed position, the volume of the glue supply chamber 12 decreases V1=HD1, and the volume of the glue outlet chamber 13 increases V2=HD2. Since D1 is equal to D2, the volume of the glue supply chamber 12 decreases and the volume of the glue outlet chamber 13 increases. At the same time, before the movable part 3 reaches the closed position, the connecting channel 34 is in a connected state. Therefore, during the movement of the movable part 3, the glue liquid flowing from the glue supply chamber 12 to the glue outlet chamber 13 is equal, and the total amount of glue liquid in the glue supply chamber 12 and the glue outlet chamber 13 will not change, thereby avoiding the phenomenon that the glue liquid is squeezed out of the glue outlet 14 when the movable part 3 moves from the dispensing position to the closed position. Similarly, when the movable part 3 moves from the closed position to the dispensing position, there will be no glue suction phenomenon, which can make the use of the dispensing valve more convenient and stable.

[0050] See also Figure 4 In the second aspect, a dispensing device is provided, comprising a bracket 8 and a glue supply unit 9, and also comprising any of the above-mentioned dispensing valves, wherein the glue supply unit 9 and the dispensing valve are connected to the bracket 8, and the outlet of the glue supply unit 9 is connected to the glue supply cavity 12. It can be understood that the beneficial effects of the above-mentioned second aspect can be referred to the relevant description in the above-mentioned first aspect, and will not be repeated here.

[0051] The above are only preferred embodiments of the present invention, and only specifically describe the technical principles of the present invention. These descriptions are only for the purpose of explaining the principles of the present invention, and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanation here, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention, and other specific implementation methods of the present invention that can be associated with by technicians in this field without creative labor, should be included in the scope of protection of the present invention.

Claims

1. A dispensing valve, characterized in that: include The valve body has a glue supply cavity and a glue outlet cavity, and the glue outlet cavity has a glue outlet; A glue driving member, movably disposed in the glue supply cavity, for driving the glue to move; A movable member, movably arranged in the valve body, the movable member comprises a first part and a second part connected to the first part, at least a part of the first part is located in the glue supply cavity and is sealed with an inner wall of the glue supply cavity, at least a part of the second part is located in the glue outlet cavity and is sealed with an inner wall of the glue outlet cavity, a connecting channel is provided on the movable member, the connecting channel runs through the first part and the second part, the movable member can move between a glue dispensing position and a closed position, when the movable member is located at the glue dispensing position, the movable member is spaced apart from the glue driving member, the glue supply cavity and the glue outlet cavity are connected through the connecting channel, when the movable member is located at the closed position, the movable member abuts against the glue driving member, a first opening of the connecting channel is blocked by the glue driving member, and the first opening is a port for the connecting channel to communicate with the glue supply cavity; A driving structure is arranged on the valve body, and the driving structure is used to drive the movable part to move between the dispensing position and the closing position.

2. The dispensing valve according to claim 1, characterized in that: The glue supply cavity and the glue outlet cavity are spaced apart, and the first part and the second part are also spaced apart. The movable part also includes a third part, which is located between the first part and the second part and connects the first part and the second part. At least part of the third part contacts the driving structure.

3. The dispensing valve according to claim 2, characterized in that: The driving structure includes a piston chamber, which is located between the glue supply chamber and the glue outlet chamber and is connected to the glue supply chamber and the glue outlet chamber. The third part is located in the piston chamber, and the third part is in sealing contact with the inner wall of the piston chamber to separate the piston chamber into a first closed chamber and a second closed chamber that are not connected to each other. The first closed chamber is used to communicate with an external air source, and the second closed chamber is also used to communicate with an external air source.

4. The dispensing valve according to claim 3, characterized in that: The valve body is respectively provided with a first connecting hole and a second connecting hole, the first end of the first connecting hole is connected to the first closed cavity, the second end of the first connecting hole is used to connect to an external air source, and the first end of the second connecting hole is connected to the second closed cavity, and the second end of the second connecting hole is used to connect to an external air source.

5. The dispensing valve according to claim 4, characterized in that: The second end of the first connecting hole and the second end of the second connecting hole are both located on the same side of the valve body.

6. The dispensing valve according to claim 3, characterized in that: A first seal is provided between the first part and the inner wall of the glue supply cavity, a second seal is provided between the second part and the inner wall of the glue outlet cavity, and a third seal is provided between the third part and the inner wall of the piston cavity.

7. The dispensing valve according to claim 1, characterized in that: The glue driving component includes a driving screw, which has the freedom to rotate around its own axis relative to the valve body. A spiral structure is provided on the outer wall of the driving screw. The spiral structure and the inner wall of the glue supply cavity form a spiral channel for accommodating the glue. The spiral structure is used to push the glue to move axially along the driving screw through the spiral channel when the driving screw rotates.

8. The dispensing valve according to claim 7, characterized in that: The driving screw is provided with a tip portion at the end facing the movable member. When the movable member is in the closed position, the tip end of the tip portion is inserted into the first opening, and the surface of the tip portion is in sealing contact with the side wall of the first opening to seal the first opening.

9. The dispensing valve according to any one of claims 1 to 8, characterized in that: The cross section of the first portion is a first cross section, the cross section of the second portion is a second cross section, and the areas of the first cross section and the second cross section are equal.

10. A dispensing device, characterized in that: It comprises a bracket and a glue supply part, and also comprises a glue dispensing valve as described in any one of claims 1 to 9, wherein the glue supply part and the glue dispensing valve are connected to the bracket, and the outlet of the glue supply part is connected to the glue supply cavity.

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