Automatic valve changing and glue changing device applied to glue dispensing equipment

Abstract

The invention relates to the technical field of dispensing equipment, and provides an automatic valve and glue changing device applied to dispensing equipment, comprising: a back plate main body, one side of which is provided with a back fixing plate, the other side of which is provided with a driving hinge, and which is internally provided with an air chamber and a movable push rod communicated by an air passage; a clamping hook clamped with the driving hinge is arranged on one side of the valve main body, an electromagnet is arranged on a mounting seat on the other side of the valve main body, and the bottom of the valve main body is connected with a runner; the cylinder fixing support is provided with a containing part, an adapter and a metal plate capable of being attracted by the electromagnet. The movable push rod can be driven by air pressure to push the drive hinge to stretch out and be clamped with the clamping hook, and therefore the valve body can be rapidly locked. The electromagnet can adsorb the metal plate to realize rapid combination of the rubber sleeve; the device has the characteristics of modular structure, reliable locking, quick replacement, good sealing performance and high integration level.

Description

An automatic valve and glue changing device for use in dispensing equipment Technical Field

[0001] This invention relates to the field of dispensing equipment technology, and more specifically to an automatic valve changing and glue changing device applied to dispensing equipment. Background Technology

[0002] In non-contact dispensing processes, piezoelectric jet valves are core components widely used in precision dispensing scenarios such as semiconductor packaging and automotive electronics. A complete dispensing valve system typically includes a backplate fixed to the machine, a valve body that performs the jetting action, and a support bracket for storing and delivering the adhesive. In actual production, frequent replacement of the cartridge and even the entire valve body is necessary to accommodate different adhesives or for quick maintenance. While some existing technologies aim to achieve quick replacement, they all have significant limitations. For example, some solutions focus on quick-release connections between the cartridge and the flow channel, but fail to adequately address the reliable clamping and sealing of the cartridge on the valve body. Furthermore, their valve core spring sealing structure increases flow resistance, leading to higher supply pressure requirements and affecting dispensing efficiency. Other solutions are limited to specific adhesive types such as hot melt adhesives, lacking versatility. Still others employ a parallel layout of multiple cartridges for adhesive switching, resulting in a complex and bulky overall structure that fails to meet the requirements of modern production lines for compactness and high integration.

[0003] In summary, existing technologies lack a modular automatic valve replacement solution that can achieve rapid, accurate, and reliable replacement of the glue cartridge and valve body in an integrated manner, while ensuring efficient connection of electrical, pneumatic, and signal circuits, and is applicable to a wide range of glue types. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic valve and glue replacement device for dispensing equipment, so as to solve the problems of cumbersome valve body and glue cartridge replacement operation, low degree of automation, poor connection reliability and insufficient sealing performance in the prior art.

[0005] To achieve the above objectives, the present invention provides an automatic valve changing and glue changing device for dispensing equipment, employing the following technical solution:

[0006] An automatic valve and glue changing device for dispensing equipment includes: a back plate main body, one side of which is provided with a back fixing plate for fixing to the machine base, and the other side of which is provided with a rotatable drive hinge; an air chamber is provided inside the back plate main body, and an air passage communicating with the air chamber is provided on the back fixing plate, the air passage being used to connect to an external air source; a movable push rod is provided inside the air chamber, the movable push rod including a limiting part and a driving part, the limiting part being slidably disposed inside the air chamber, and the driving part extending from the limiting part toward the drive hinge; and a valve body main body, the side of which facing the back plate main body is provided with a hook. A mounting base is provided on the side of the valve body facing away from the back plate body, and an electromagnet is provided on the mounting base; a flow channel is fixedly connected to the bottom of the valve body; a cylindrical fixing bracket is provided, which is provided with a receiving part for accommodating a rubber tube, and an adapter for communicating with the rubber tube is provided at the bottom of the cylindrical fixing bracket; a metal plate that can be attracted by the electromagnet is provided on the side of the cylindrical fixing bracket facing the valve body; wherein, the movable push rod is configured such that: when air pressure is introduced into the air chamber, the limiting part is driven to slide, causing the driving part to push against the driving hinge, so that the driving hinge extends out from the back plate body and engages with the hook.

[0007] As an optimization of an automatic valve changing and glue changing device for dispensing equipment, the valve body is also provided with a heating block, which covers the outer periphery of the flow channel.

[0008] As an optimization of an automatic valve and glue changing device for dispensing equipment, the valve body is also provided with a temperature control circuit board and a first contact circuit board; the temperature control circuit board is electrically connected to the heating block, and the first contact circuit board is electrically in contact with the temperature control circuit board; when the valve body is locked to the back plate body by the hook and the drive hinge, the first contact circuit board is in contact with the electrical control circuit in the back plate body.

[0009] As an optimization of an automatic valve changing and glue changing device applied to dispensing equipment, the adapter includes a Luer connector and a one-way adapter cavity. The Luer connector is used to communicate with the glue cartridge, and the Luer connector is connected to the one-way adapter cavity. The side wall of the one-way adapter cavity is provided with a docking hole, and the one-way adapter cavity is connected to the flow channel through the docking hole.

[0010] As an optimization of an automatic valve changing and glue changing device for dispensing equipment, a silicone seat is provided in the one-way transition cavity, and a cross silicone valve is provided on the silicone seat. The cross silicone valve is located at the docking hole of the one-way transition cavity.

[0011] As an optimization of an automatic valve changing and glue changing device for dispensing equipment, the mounting base is also equipped with a proximity switch for detecting whether the cylinder fixing bracket has moved to a preset installation position; the electromagnet is configured to be energized in response to the proximity switch detecting that the cylinder fixing bracket has reached the preset installation position.

[0012] As an optimization of an automatic valve changing and glue changing device for dispensing equipment, a liquid level sensor is installed on the cylinder fixing bracket, which is used to monitor the glue level in the glue cylinder.

[0013] As an optimization of an automatic valve and glue changing device for dispensing equipment, the cylinder fixing bracket is also provided with a liquid level circuit board, which is electrically connected to the liquid level sensor; a second contact circuit board is provided on the side wall of the valve body; when the cylinder fixing bracket is attracted and fixed by the electromagnet through the metal plate, the liquid level circuit board and the second contact circuit board make contact and conduct.

[0014] As an optimization of an automatic valve changing and glue changing device for dispensing equipment, the back plate body is provided with a positioning hole, and the valve body body is provided with a positioning pin, which can be inserted into the positioning hole.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) By using the pneumatic hinge locking mechanism of the back plate body and the electromagnet adsorption mechanism of the valve body body, the valve body and the rubber sleeve are automatically locked and connected respectively, simplifying the replacement process into two fast and continuous steps, significantly improving the equipment operation and maintenance efficiency and production flexibility, and realizing efficient and automatic fast replacement.

[0016] (2) Pre-positioning is achieved by using positioning pin holes, combined with pneumatic locking and electromagnetic adsorption, to realize a mechanical connection with high repeatability accuracy; a cross silicone valve with low opening pressure is used to ensure smooth flow of glue while effectively sealing medium and low viscosity glue, taking into account both reliability and process adaptability.

[0017] (3) The heating control, liquid level detection and other circuits are modularly integrated into the valve body and rubber sleeve assembly, and the contact contacts are used to achieve rapid electrical connection, avoiding the cumbersome and wear-prone traditional cable plugging and unplugging, simplifying operation, and improving the overall reliability, maintenance convenience and status monitoring capability of the system. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 is a schematic diagram of the overall structure of an automatic valve and glue changing device applied to a dispensing equipment according to an embodiment of this application; Figure 2 is a schematic diagram of the cross-sectional structure of an automatic valve and glue changing device applied to a dispensing equipment according to an embodiment of this application; Figure 3 is a schematic diagram of the overall structure of the valve body according to an embodiment of this application; Figure 4 is a schematic diagram of the overall structure of the cylinder fixing bracket according to an embodiment of this application; Figure 5 is a schematic diagram of the overall structure of the cylinder fixing bracket from another perspective according to an embodiment of this application; Figure 6 is an exploded structural diagram of the adapter according to an embodiment of this application.

[0020] In the diagram: 1. Backplate main body; 10. Electrical control line; 11. Rear mounting plate; 111. Air passage; 12. Drive hinge; 13. Air chamber; 14. Movable push rod; 141. Limiting part; 142. Drive part; 15. Positioning hole; 2. Valve body main body; 201. Bottom bracket; 202. Valve top cover; 203. Valve core; 21. Hook; 22. Mounting base; 23. Electromagnet; 24. Flow channel; 25. Heating block; 26. 1. Temperature control circuit board; 252. First contact circuit board; 26. Proximity switch; 27. Second contact circuit board; 28. Positioning pin; 3. Cylinder fixing bracket; 30. Glue tube; 31. Receiving part; 32. Adapter; 321. Luer connector; 322. One-way adapter cavity; 323. Connecting hole; 324. Silicone seat; 325. Cross silicone valve; 33. Metal plate; 34. Liquid level sensor; 35. Liquid level circuit board. Detailed Implementation

[0021] To make the technical solution and advantages of the present invention clearer, the present invention and its beneficial effects will be described in further detail below with reference to specific embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0022] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0024] The present application will be further described in detail below with reference to Figures 1-6.

[0025] This application provides an automatic valve and glue changing device for dispensing equipment. Through modular design, the replacement process of the valve body and glue cartridge is integrated into two efficient and reliable automated steps, realizing rapid and automatic replacement of the valve body and glue cartridge. The technical solution adopted is as follows: Referring to Figure 1, an automatic valve and glue changing device for dispensing equipment includes a back plate body 1, a valve body body 2, and a cartridge fixing bracket 3.

[0026] Referring to Figures 1 and 2, the backplate body 1 serves as the mounting base and drive source for the entire device. It has a flat, box-like structure with 10 pre-embedded electrical control lines and a control system. The top is equipped with an air duct and the 10 electrical control lines for external connection. A backplate 11 is fixedly mounted on one side of the backplate body 1, and is secured to the dispensing equipment's base or motion module, such as the Z-axis platform, using screws or other fasteners. An opening is located on the other side of the backplate body 1, with a pair of drive hinges 12 symmetrically mounted on its end face. The drive hinges 12 are mounted on the end face of the opening via pre-tensioned torsion springs. In the initial or open state, the drive hinges 12 automatically retract inward and hide inside the opening under the contraction force of the torsion springs, thus creating space for the valve body 2 to dock. A rectangular air chamber 13 is machined inside the backplate body 1. An air passage 111, connecting to an external air source, is provided on the backplate 11. The air passage 111 communicates with the air chamber 13, forming a complete pneumatic circuit. A movable push rod 14 is installed inside the air chamber 13. The movable push rod 14 is a T-shaped rod, including a limiting part 141 with a larger cross-section and a driving part 142 with a smaller cross-section. The limiting part 141 is slidably disposed inside the air chamber 13, and its size is precisely matched with the air chamber 13, allowing it to make stable reciprocating linear motion along the air chamber 13 under air pressure. The driving part 142 extends straight from the limiting part 141 toward the driving hinge 12, and the end of the driving part 142 of the movable push rod 14 is precisely aligned with the inner side of the two driving hinges 12. When an external air source supplies air to the air chamber 13 through the air passage 111, the air pressure overcomes the spring resistance and pushes the limiting part 141 of the movable push rod 14, causing the entire movable push rod 14 to move toward the driving hinge 12. Its driving part 142 then extends and pushes against the root of the two driving hinges 12, forcing them to overcome the preload of the torsional spring and rotate outward from inside the back plate body 1, forming a ready-to-engage state. This combination of pneumatic drive and mechanical transmission enables an efficient and reliable conversion from air pressure to rotary snap-fit ​​action.

[0027] Referring to Figures 1, 2, and 3, the valve body 2 is the core unit for performing the dispensing function and also serves as an intermediate carrier connecting the backplate body 1 and the glue cartridge 30. The valve body 2 mainly includes an outer shell (e.g., a bottom bracket 201 and a valve cover 202), an internal valve core 203 (e.g., a piezoelectric valve), and a functional module at the bottom. A latch 21 is integrally formed on the side of the valve body 2 facing the backplate body 1. When the valve body 2 is moved to the docking position with the backplate body 1, the drive hinge 12 extending from the backplate body 1 can rotate and engage with the latch 21, thereby firmly locking the valve body 2 onto the backplate body 1 under continuous air pressure, enabling quick valve replacement and fixed valve replacement. A mounting base 22 is provided on the side of the valve body 2 away from the backplate body 1, and an integrated electromagnet 23 is embedded in the mounting base 22 for subsequent adsorption and fixation of the glue cartridge 30. A flow channel 24 is fixedly connected to the bottom of the valve body 2. The flow channel 24 is the channel through which the glue flows from the glue cartridge 30 to the spray unit inside the valve body.

[0028] Furthermore, referring to Figures 2 and 3, a heating block 25 is also installed at the bottom of the valve body 2. The heating block 25 is made of a high thermal conductivity material and tightly covers the outer periphery of the flow channel 24. It is used to heat and keep the flowing adhesive at a constant temperature to prevent changes in viscosity due to temperature variations, thereby affecting the dispensing accuracy and consistency. Furthermore, a temperature control circuit board 251 and a first contact circuit board 252 are also integrated on the valve body 2. The temperature control circuit board 251 is electrically connected to the heating block 25, enabling precise closed-loop temperature control. The first contact circuit board 252 is electrically connected to the temperature control circuit board 251 and is connected to exposed electrical contacts on the side of the valve body 2 via wires, forming an interface for external power supply and communication. When the valve body 2 is locked onto the back plate body 1 by the hook 21 and the drive hinge 12, the first contact circuit board 252 automatically aligns with the corresponding elastic contacts of the 10 electrical control lines pre-embedded inside the back plate body 1 and makes contact, realizing instantaneous power and signal connection. This integrated, contact-type circuit connection method avoids the inconvenience of manually plugging and unplugging cables when frequently replacing the valve body, not only improving replacement speed but also greatly reducing the risk of contact wear and connection failure caused by repeated plugging and unplugging, thus enhancing the long-term reliability of the entire system.

[0029] Referring to Figures 1, 2, 4, and 5, the cylinder fixing bracket 3 is the support and interface unit for the glue cartridge 30. The cylinder fixing bracket 3 is typically a square frame structure with a vertically penetrating receiving portion 31 (e.g., a circular hole) at its center for inserting and securing the standard glue cartridge 30. At the bottom of the cylinder fixing bracket 3, an adapter 32 is installed, which connects the glue cartridge 30 and the flow channel 24. Referring to Figures 2, 5, and 6, the adapter 32 typically includes a Luer connector 321 and a one-way adapter cavity 322. The top of the Luer connector 321 has an upward-facing communication port, and its standard interface is used for a quick, sealed connection with the dispensing nozzle at the bottom of the glue cartridge 30. The bottom of the Luer connector 321 communicates with the one-way adapter cavity 322. The one-way adapter cavity 322 is a hollow cylinder with one side wall opening that mates with the Luer connector 321, and the other side wall has a mating hole 323. Referring to Figure 6, a silicone seat 324 is further installed inside the one-way adapter cavity 322. A cross-shaped silicone valve 325 is installed at one end of the silicone seat 324, and the cross-shaped silicone valve 325 is precisely embedded in the mating hole 323. The cross-shaped silicone valve 325 utilizes the elasticity of the silicone material to form a cross-shaped slit, which has extremely low opening pressure and negligible flow resistance, and has minimal impact on the supply pressure and flow rate during the dispensing process. At the same time, relying on the passive sealing method of the material elasticity, it can effectively seal low-to-medium viscosity adhesives, preventing leakage or self-flow when not in operation, significantly improving the versatility and safety of the device for adhesives of different properties. When there is no pressure inside the glue cartridge 30 or when the glue cartridge 30 is detached, the cross-shaped slit closes tightly under the elasticity of the silicone itself, forming a seal. When the glue cartridge 30 is installed in place and supply air pressure is introduced, the adhesive pressure will easily open the cross-shaped slit from the inside, allowing the adhesive to flow smoothly into the flow channel 24.

[0030] Referring to Figures 2, 4, and 5, a metal plate 33 is fixedly installed on the side of the cylinder fixing bracket 3 facing the valve body 2. The position of the metal plate 33 precisely corresponds to the electromagnet 23 on the valve body 2 mounting base 22. When the cylinder fixing bracket 3 is moved to the front of the valve body 2, the electromagnet 23 is energized to generate a strong magnetic force, attracting the metal plate 33. This quickly and firmly pulls the entire cylinder fixing bracket 3, along with the rubber sleeve 30, onto the valve body 2, enabling rapid replacement of the rubber sleeve 30. At this time, the mating hole 323 on the side wall of the one-way transition cavity 322 also automatically aligns with the inlet of the flow channel 24 at the bottom of the valve body 2, achieving a sealed connection and ensuring immediate unobstructed flow of fluid.

[0031] Referring to Figures 2 and 3, a proximity switch 26 is further installed on the mounting base 22 of the valve body 2. The proximity switch 26 is used for non-contact detection of whether the cylinder fixing bracket 3 has moved to the vicinity of the preset installation position. When the cylinder fixing bracket 3 approaches the set distance, the proximity switch 26 sends a sensing signal. This signal can serve as an accurate condition for triggering the electromagnet 23 to be energized and attracted, thereby realizing the automated closed-loop control of "sensing-triggering-execution" during the glue replacement process, improving the accuracy and coordination of the replacement action.

[0032] In a preferred embodiment of this application, referring to Figures 2, 4, and 5, a liquid level sensor 34 is installed on the side wall of the cylinder fixing bracket 3. The liquid level sensor 34 can be a capacitive sensor or a photoelectric sensor, with its detection end pointing towards the glue cartridge 30 inside the accommodating portion 31, for non-contact real-time detection of the remaining glue in the glue cartridge 30. Further, a liquid level circuit board 35 is also installed on the cylinder fixing bracket 3. The liquid level circuit board 35 is electrically connected to the liquid level sensor 34 and is used to process the sensing signal. A second contact circuit board 27 is installed on the side wall of the valve body 2. When the cylinder fixing bracket 3 is attracted and fixed by the electromagnet 23, the liquid level circuit board 35 on the cylinder fixing bracket 3 and the second contact circuit board 27 on the valve body 2 make contact and conduct, thereby stably transmitting the glue level signal to the control system. Through the above structure, the glue cartridge 30 assembly becomes an intelligent module with built-in sensing function, eliminating the need for additional sensor cable connections each time it is replaced, simplifying operation, and realizing real-time intelligent monitoring of the feeding status.

[0033] In a preferred embodiment of this application, referring to Figure 2, a positioning hole 15 is provided on the back plate body 1, and a corresponding positioning pin 28 is provided on the valve body body 2. During valve replacement, the robotic arm moves the valve body body 2 and first inserts the positioning pin 28 into the positioning hole 15 on the back plate body 1, achieving precise pre-positioning and mechanical guidance between the valve body body 2 and the back plate body 1. This step ensures that the subsequent drive hinge 12 can rotate accurately and smoothly into the hook 21 without deviation, greatly improving the success rate of the replacement operation and the repeatability of the system's positioning accuracy, which is the foundation for automated and reliable operation.

[0034] In a preferred embodiment of the invention, the cylinder fixing bracket 3 integrates a liquid level sensing function. A liquid level sensor 34 is mounted on the bracket, close to the wall of the glue cylinder 30, enabling non-contact detection of the glue level. The sensing signal is transmitted to the main control system via the liquid level circuit board 35, at the instant the glue cylinder 30 is installed and the electromagnet 23 is attracted, through contact with the second contact circuit board 27 on the valve body 2. This design makes the glue cylinder 30 assembly an intelligent, sensing module, eliminating the need for separate sensor cable connections during replacement, simplifying the operation process, and ensuring the reliability of the signal connection.

[0035] The working process and implementation principle of the device of this invention are as follows: In the initial state, the back plate body 1 is fixed to the machine base, the drive hinge 12 is closed into the opening of the back plate body 1 under the action of the torsion spring, and the movable push rod 14 is in the reset state. When the automatic valve changing process begins, the machine base motion module moves the back plate body 1 to the valve changing position. An external actuator, such as a cylinder manipulator, moves a valve body 2 to be installed, so that the positioning pin 28 on it is aligned with the positioning hole 15 on the back plate body 1 and inserted to achieve coarse positioning. The control system introduces air pressure into the air passage 111 of the back plate body 1. The air pressure pushes the movable push rod 14, causing its drive part 142 to move forward, pushing and driving the two drive hinges 12 to rotate outward against the spring force. The extended drive hinges 12 are precisely engaged in the hooks 21 on the rear side of the valve body 2. The continuous air pressure keeps the drive hinges 12 in the extended and locked state, thereby firmly locking the valve body 2 onto the back plate body 1, completing the valve changing. Simultaneously, the first contact circuit board 252 on the valve body 2 is connected to the internal wiring of the back plate body 1, providing power and communication to the valve body. The automatic glue replacement process then proceeds. After the valve replacement is completed, the machine motion module moves the back plate assembly with the valve body 2 installed to the glue replacement station. An external actuator moves a pre-filled glue-filled cylindrical fixing bracket 3 with a glue cartridge 30, initially aligning its positioning features with the corresponding features on the front of the valve body 2. The cylindrical fixing bracket 3 continues to move towards the valve body 2. When they approach a certain distance, the proximity switch 26 on the valve body 2 mounting base 22 detects a signal. The control system then energizes the electromagnet 23. The electromagnet 23 generates magnetic force, strongly attracting the metal plate 33 on the cylindrical fixing bracket 3, quickly pulling it tight and attaching it to the valve body 2, completing the glue replacement. Simultaneously, the adapter 32 at the bottom of the cylindrical fixing bracket 3 aligns with and seals the flow channel 24 of the valve body 2; the liquid level circuit board 35 also contacts and connects with the second contact circuit board 27. The device can then perform dispensing normally. Under pressure, the adhesive pushes open the cross-shaped silicone valve 325, flows through the flow channel 24 into the valve body, and is precisely sprayed out. The heating block 25 keeps the adhesive warm, and the liquid level sensor 34 monitors the remaining amount in real time. When it is necessary to replace the adhesive or the valve body, the above process is reversed: the electromagnet 23 is de-energized, the robotic arm removes the old adhesive cartridge 30 assembly; the air circuit is depressurized, the movable push rod 14 resets, the drive hinge 12 retracts under the action of the spring, and the robotic arm removes the old valve body 2. Then a new round of automatic replacement can begin.

[0036] This application's embodiment simplifies the replacement process of the valve body and glue cartridge into two fast and reliable automated steps through a pneumatic hinge locking mechanism on the backplate main body, an electromagnetic adsorption mechanism on the valve body main body, and a highly integrated circuit and flow channel interface design. Its beneficial effects are significant: it solves problems such as cumbersome replacement, unreliable sealing, low integration, and impact on dispensing performance in existing technologies; the pneumatic and electromagnetic drive methods offer rapid response and controllable force; the modular and automatic alignment design greatly improves replacement efficiency and accuracy; and the integrated circuit connection and cross valve sealing design enhance reliability, versatility, and intelligence, ultimately achieving efficient, flexible, and intelligent operation and maintenance of the dispensing equipment.

[0037] Based on the disclosure and teachings of the foregoing specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments described above, and any obvious improvements, substitutions, or modifications made by those skilled in the art based on the present invention are within the scope of protection of the present invention. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on the present invention.

Claims

1. An automatic valve changing and glue changing device applied to dispensing equipment, characterized in that, include: A backplate body (1) has a back fixing plate (11) on one side for fixing to the machine base, and a rotatable drive hinge (12) on the other side. An air chamber (13) is provided inside the backplate body (1), and an air passage (111) communicating with the air chamber (13) is provided on the back fixing plate (11). The air passage (111) is used to connect to an external air source. The air chamber (13) contains… A movable push rod (14) is provided, the movable push rod (14) including a limiting part (141) and a driving part (142). The limiting part (141) is slidably disposed in the air chamber (13), and the driving part (142) extends from the limiting part (141) toward the driving hinge (12); valve body (2), the valve body (2) is provided with a hook (21) on the side facing the back plate body (1), the valve body (2) back A mounting base (22) is provided on one side of the back plate body (1), and an electromagnet (23) is provided on the mounting base (22); a flow channel (24) is fixedly connected to the bottom of the valve body body (2); a cylinder fixing bracket (3) is provided, the cylinder fixing bracket (3) is provided with a receiving part (31) for accommodating the rubber tube (30), and the bottom of the cylinder fixing bracket (3) is provided with an adapter (32) for communicating with the rubber tube (30). The fixed bracket (3) is provided with a metal plate (33) that can be attracted by the electromagnet (23) on the side facing the valve body (2); wherein, the movable push rod (14) is configured such that when air pressure is introduced into the air chamber (13), the limiting part (141) is driven to slide, so that the driving part (142) pushes against the driving hinge (12), so that the driving hinge (12) extends out from the back plate body (1) and engages with the hook (21).

2. The automatic valve changing and glue changing device applied to a dispensing equipment according to claim 1, characterized in that, The valve body (2) is also provided with a heating block (25), which covers the outer periphery of the flow channel (24).

3. The automatic valve changing and glue changing device applied to a dispensing equipment according to claim 2, characterized in that, The valve body (2) is also provided with a temperature control circuit board (251) and a first contact circuit board (252); the temperature control circuit board (251) is electrically connected to the heating block (25), and the first contact circuit board (252) is electrically in contact with the temperature control circuit board (251); when the valve body (2) is locked to the back plate body (1) by the hook (21) and the drive hinge (12), the first contact circuit board (252) is in contact with the electrical control line (10) in the back plate body (1).

4. The automatic valve changing and glue changing device for dispensing equipment according to claim 1, characterized in that, The adapter (32) includes a Luer connector (321) and a one-way adapter cavity (322). The Luer connector (321) is used to communicate with the rubber tube (30), and the Luer connector (321) is connected to the one-way adapter cavity (322). The side wall of the one-way adapter cavity (322) is provided with a docking hole (323), and the one-way adapter cavity (322) is connected to the flow channel (24) through the docking hole (323).

5. An automatic valve changing and glue changing device for use in dispensing equipment according to claim 4, characterized in that, A silicone seat (324) is provided inside the one-way adapter cavity (322), and a cross silicone valve (325) is provided on the silicone seat (324). The cross silicone valve (325) is located at the docking hole (323) of the one-way adapter cavity (322).

6. The automatic valve changing and glue changing device for dispensing equipment according to claim 1, characterized in that, The mounting base (22) is also provided with a proximity switch (26) for detecting whether the cylinder fixing bracket (3) has moved to a preset installation position; the electromagnet (23) is configured to be energized in response to the proximity switch (26) detecting that the cylinder fixing bracket (3) has reached the preset installation position.

7. An automatic valve changing and glue changing device for use in dispensing equipment according to claim 1, characterized in that, A liquid level sensor (34) is provided on the cylinder fixing bracket (3), and the liquid level sensor (34) is used to monitor the glue level in the glue cylinder (30).

8. An automatic valve changing and glue changing device for use in dispensing equipment according to claim 7, characterized in that, The cylinder fixing bracket (3) is also provided with a liquid level circuit board (35), which is electrically connected to the liquid level sensor (34); a second contact circuit board (27) is provided on the side wall of the valve body (2); when the cylinder fixing bracket (3) is attracted and fixed by the electromagnet (23) through the metal plate (33), the liquid level circuit board (35) and the second contact circuit board (27) are in contact and connected.

9. An automatic valve changing and glue changing device for use in dispensing equipment according to claim 1, characterized in that, The back plate body (1) is provided with a positioning hole (15), and the valve body body (2) is provided with a positioning pin (28), which can be inserted into the positioning hole (15).

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