Shock pulse jet valve

Abstract

The application discloses a shock wave pulse type injection valve and belongs to the technical field of injection valves. The shock wave pulse type injection valve can realize the following points: when carrying out the dispensing operation, the air inlet is arranged to keep the pressure of 0.3-0.7 Mpa, the high-frequency electromagnetic valve is rapidly opened, at this time, the high-pressure air flow rapidly expands after entering the shock wave tube connected with the atmosphere, and a high-speed moving high-pressure shock wave is generated at supersonic speed, the shock wave impacts the diaphragm to make the diaphragm rapidly deform by a small amount, the deformed diaphragm drives the resonant punch needle to also rapidly move, the resonant punch needle transmits the momentum to the glue in the gap between the resonant punch needle and the nozzle in a short time, the glue obtains the speed and is rapidly sprayed from the glue outlet of the nozzle, the generated shock wave is stable, the number of generated shock waves is precisely controlled by the high-frequency electromagnetic valve, and then the glue output per unit time is controlled, the resonant punch needle does not directly impact the nozzle in the process, noise generated by the equipment during operation is reduced, and meanwhile, the nozzle can be guaranteed to not be affected by the abrasion to affect the dispensing stability.

Description

Technical Field

[0001] This invention relates to the field of injection valve technology, and more specifically, to a shock wave pulse injection valve. Background Technology

[0002] Jet valves are an indispensable type of dispensing valve in the dispensing industry, with their non-contact, high-speed, and precision dispensing characteristics being particularly prominent. The injection point or injection line width can reach 0.3 mm, with delicate, smooth lines, no jagged edges, no ripples, no splashing, and no hanging nozzles. This fine dispensing point exceeds the application range of ordinary dispensing valves, making it an ideal choice for the electronics industry. For example, jet valves can be used in industries that require coating, such as bonding electronic products, smartphone components, 3D molded interconnect devices, and printed circuit boards.

[0003] Traditional pneumatic spray valves consist of a micrometer, valve head, spring, striker, valve seat, glue inlet, nozzle, and nozzle locking device. The working principle of this type of pneumatic spray valve is that air pressure pushes one side of the striker to compress the spring. At this time, the striker and the nozzle are separated to a fixed gap, and glue enters the gap. Then, after depressurization, the spring pushes the nozzle back until it hits the nozzle to complete one spray dispensing cycle. The high-frequency pressure and depressurization of the striker by the high-frequency solenoid valve controls the precision dispensing per unit time. The amount of glue sprayed in a single cycle can be controlled by adjusting the micrometer knob.

[0004] However, the spring has limited stiffness and the exhaust channel itself has a certain resistance, which greatly limits its own spray frequency and cannot keep up with the working frequency of the high-frequency solenoid valve. In addition, the metal striker impacts the metal nozzle at a high frequency, which makes a lot of noise during use, and the nozzle will also wear faster, affecting the dispensing stability. Summary of the Invention

[0005] 1. Technical problems to be solved

[0006] To address the problems existing in the prior art, the present invention aims to provide a shock wave pulse jet valve. During dispensing operations, the air inlet is set to maintain a pressure of 0.3–0.7 MPa. A high-frequency solenoid valve quickly opens, allowing high-pressure air to flow into the shock tube connected to the atmosphere and rapidly expand, generating a high-speed, high-pressure shock wave. This shock wave impacts the diaphragm, causing it to deform slightly. This deformation then drives the resonant striker to move rapidly. The resonant striker quickly transfers momentum to the adhesive in the gap between itself and the nozzle, gaining velocity and rapidly ejecting it from the nozzle's outlet. By stabilizing the generated shock wave and precisely controlling the number of shock waves generated by the high-frequency solenoid valve, the dispensing volume per unit time is controlled. During this process, the resonant striker does not directly impact the nozzle, reducing noise during operation and ensuring that nozzle wear does not affect dispensing stability.

[0007] 2. Technical Solution

[0008] To solve the above problems, the present invention adopts the following technical solution.

[0009] A shockwave pulse jet valve includes a lower jet valve body with a volumetric cavity. An upper jet valve body is mounted on the lower jet valve body. A pneumatic connector is screwed to the lower end of the upper jet valve body. A shock tube is screwed between the lower jet valve body and the pneumatic connector. A pair of vertically distributed annular grooves are formed within the shock tubes. A diaphragm is installed in the upper annular groove, and a sealant is filled in the lower annular groove. A glue inlet is mounted on the side wall of the lower jet valve body, with a glue inlet port communicating with the volumetric cavity of the lower jet valve body. A resonant striker is fixedly connected to the lower end of the diaphragm, located within the volumetric cavity of the lower jet valve body. A nozzle is positioned below the volumetric cavity. This solution can achieve… During dispensing, the air inlet is set to maintain a pressure of 0.3–0.7 MPa. The high-frequency solenoid valve opens rapidly, allowing high-pressure air to flow into the shock tube connected to the atmosphere and expand rapidly, generating a high-speed, high-pressure shock wave at supersonic speed. The shock wave impacts the diaphragm, causing it to deform slightly. This deformation drives the resonant pin to move rapidly as well. The resonant pin transfers momentum to the adhesive in the gap between itself and the nozzle in a short time. The adhesive gains velocity and is quickly ejected from the nozzle outlet. The number of shock waves generated is precisely controlled by the high-frequency solenoid valve, thus controlling the amount of adhesive dispensed per unit time. During this process, the resonant pin does not directly impact the nozzle, reducing noise during equipment operation and ensuring that the nozzle does not wear, thus maintaining dispensing stability.

[0010] Furthermore, the upper valve body of the injection valve and the air connector are interconnected, and the contact surfaces of the upper valve body and the air connector are provided with sealing gaskets that match their shape. The sealing gaskets ensure the airtightness of the equipment. The air connector connects the various components of the lower valve body and the upper valve body of the injection valve. An air inlet is installed on the side wall of the air connector. The air inlet is the source of compressed air. By changing the air inlet required by the upper valve body of the injection valve to the air connector, it is convenient to connect pipes and optimizes the overall structure.

[0011] Furthermore, the shock tube has an air inlet chamber inside, which provides a flow channel for the compressed gas entering the device through the air inlet. A silencer is installed on the side wall of the air connector and is connected to the air inlet chamber to reduce noise in the gas.

[0012] Furthermore, the annular groove on the upper side matches the surface shape of the diaphragm, and the diaphragm, the resonant striker, and the nozzle are all on the same axis. A flexible protrusion is fixedly connected to the lower surface of the diaphragm, and the sum of the heights of the diaphragm and the flexible protrusion matches the depth of the annular groove on the upper side. The flexible protrusion is a hemispherical protrusion, and multiple flexible protrusions are distributed in a ring array around the geometric center of the diaphragm. The flexible protrusions support the diaphragm and allow it to deform after receiving a shock wave. After the deformation, the resonant striker moves towards the end closer to the nozzle.

[0013] Furthermore, the seal is located directly below the diaphragm, and the inner side of the seal is integrally formed with a sleeve that matches the shape of the resonant striker. This sleeve directly contacts the diaphragm by isolating the adhesive, and serves to press and protect the diaphragm. The sleeve effectively prevents the seal from rolling up during equipment use.

[0014] Furthermore, the inner bottom surface of the volumetric cavity is configured as a funnel shape, and the inner bottom surface of the volumetric cavity is coated with a smooth coating, making it easier for the glue in the volumetric cavity to flow to the nozzle, thereby ensuring that the nozzle gap is filled with a sufficient amount of glue for the current dispensing operation.

[0015] 3. Beneficial effects

[0016] Compared with the prior art, the advantages of this invention are:

[0017] (1) This solution can achieve the following when the air inlet is set to maintain a pressure of 0.3 to 0.7 MPa during dispensing operation: the high-frequency solenoid valve opens the valve quickly, and the high-pressure air flows into the shock tube connected to the atmosphere and expands rapidly, generating a high-speed high-pressure shock wave at supersonic speed. The shock wave hits the diaphragm, causing it to deform slightly. After deformation, it drives the resonant pin to move rapidly. The resonant pin transfers momentum to the glue in the gap between it and the nozzle in a short time. The glue gains speed and is quickly ejected from the nozzle outlet. The number of shock waves generated is precisely controlled by the high-frequency solenoid valve, thereby controlling the amount of glue dispensed per unit time. During this process, the resonant pin does not directly hit the nozzle, reducing the noise generated during equipment operation. At the same time, it can ensure that the nozzle will not affect the dispensing stability due to wear.

[0018] (2) The upper valve body of the injection valve and the air connector are interconnected, and the contact surface of the upper valve body of the injection valve and the air connector is also provided with a sealing gasket that matches its shape. The sealing gasket ensures the airtightness of the equipment. The lower valve body of the injection valve and the upper valve body of the injection valve are connected by the air connector. An air inlet is installed on the side wall of the air connector. The air inlet is the source of compressed air. The air inlet required by the upper valve body of the injection valve is changed to the air connector through the air inlet, which facilitates the connection and has the function of optimizing the overall structure.

[0019] (3) An air inlet chamber is provided inside the shock tube. The air inlet chamber provides a flow channel for the compressed gas entering the equipment through the air inlet. A silencer is installed on the side wall of the air connector and is connected to the air inlet chamber. The silencer reduces the noise of the gas.

[0020] (4) The upper annular groove matches the surface shape of the diaphragm, and the diaphragm, the resonant striker, and the nozzle are all on the same axis. A flexible protrusion is fixedly connected to the lower surface of the diaphragm, and the sum of the heights of the diaphragm and the flexible protrusion matches the depth of the upper annular groove. The flexible protrusion is a hemispherical protrusion, and multiple flexible protrusions are distributed in a ring array around the geometric center of the diaphragm. The flexible protrusion supports the diaphragm and allows it to deform after receiving a shock wave. After the deformation, the resonant striker moves toward the end closer to the nozzle.

[0021] (5) The seal is located directly below the diaphragm, and the inner side of the seal is integrally formed with a sleeve that matches the shape of the resonant striker. It directly contacts the diaphragm by isolating the glue and plays the role of pressing and protecting the diaphragm. The sleeve can effectively prevent the seal from rolling up during the use of the equipment.

[0022] (6) The inner bottom surface of the volume chamber is set in the shape of a funnel and the inner bottom surface of the volume chamber is coated with a smooth coating so that the glue in the volume chamber can flow to the nozzle more easily, thereby ensuring that the nozzle gap is filled with enough glue for the current dispensing operation. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the external structure of the present invention;

[0024] Figure 2 This is a partial cross-sectional view of the present invention;

[0025] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0026] Figure 4 This is a front sectional view of the present invention;

[0027] Figure 5 This is a schematic diagram of the structure between the diaphragm and the resonant striker.

[0028] Explanation of the labels in the diagram:

[0029] 1. Lower valve body of injection valve, 2. Upper valve body of injection valve, 3. Air connector, 301 air inlet, 5. Shock tube, 6. Diaphragm, 601 flexible protrusion, 7. Seal, 8. Inlet head, 801 inlet port, 9. Resonance striker, 10. Nozzle, 11. Silencer. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0031] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" 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 a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] Example 1:

[0034] Please see Figure 1-4A shock wave pulse type injection valve includes a lower valve body 1 with a volumetric cavity inside. An upper valve body 2 is mounted on the lower valve body 1. The upper valve body 2 is a high-frequency solenoid valve with independent air inlet and outlet ports, allowing for high-speed and high-frequency opening and closing of the air path. An air path connector 3 is screwed to the lower end of the upper valve body 2, allowing for easy connection of the air inlet to the upper valve body 2. A shock tube 5 is screwed between the lower valve body 1 and the air path connector 3. The shock tube 5 expands the high-pressure gas from the upper valve body 2 to generate a strong shock wave. A pair of vertically distributed annular grooves are formed inside the shock tube 5. A diaphragm 6 is installed in the annular groove on the upper side. The function of the diaphragm 6 is to receive shock waves and generate deformation. A seal 7 is filled in the groove on the lower side. Its function is to prevent the glue in the volume cavity from contacting the diaphragm 6, and to press and protect the diaphragm 6. A glue inlet head 8 is installed on the side wall of the lower valve body 1 of the spray valve. The glue inlet head 8 is provided with a glue inlet port 801 that communicates with the volume cavity of the lower valve body 1 of the spray valve. The glue inlet port 801 is the glue inlet end. A resonant striker 9 is fixedly connected to the lower end of the diaphragm 6. The resonant striker 9 is located in the volume cavity of the lower valve body 1 of the spray valve. A nozzle 10 is provided below the volume cavity. The resonant striker 9 generates a corresponding displacement with each deformation of the diaphragm 6, and there is a small gap between the resonant striker 9 and the nozzle 10.

[0035] The principle of shock wave generation is that the gas at the high pressure and low speed end expands to produce low pressure and high speed gas. When the pressure is sufficient, the speed of the generated low pressure gas will exceed the speed of sound, and a strong shock wave with a speed much higher than the speed of sound will be generated. This shock wave has the characteristics of high pressure, stability and short duration, and is suitable for use as a power source for micro-precision dispensing. The intensity of the generated shock wave will be different under different high pressures, so the amount of dispensing at a single point can be controlled by adjusting the air intake pressure. Due to the high speed and stability of the shock wave, the diaphragm 6 and the resonant striker 9 are integrated. The momentum of the shock wave is quickly transferred to the glue and accelerates the glue. This is much faster than the spring, which needs to accelerate from zero to make the resonant striker 9 gain speed. This allows the resonant striker 9 to receive high-frequency shock wave pulses from the valve body 2 on the jet valve.

[0036] Please see Figure 2-4 The upper valve body 2 of the injection valve and the air connector 3 are interconnected, and the contact surfaces of the upper valve body 2 of the injection valve and the air connector 3 are also provided with sealing gaskets that match their shape. The sealing gaskets ensure the airtightness of the equipment. The various components of the lower valve body 1 and the upper valve body 2 of the injection valve are connected by the air connector 3. An air inlet 301 is installed on the side wall of the air connector 3. The air inlet 301 is the source of compressed air. The air inlet required by the upper valve body 2 of the injection valve is changed to the air connector 3 through the air inlet 301, which facilitates the connection and optimizes the overall structure.

[0037] Please see Figure 3-4 The shock tube 5 has an air inlet chamber inside, which provides a flow channel for the compressed gas entering the equipment through the air inlet 301. A silencer 11 is installed on the side wall of the air connector 3, and the silencer 11 is connected to the air inlet chamber. The silencer 11 reduces the noise of the gas.

[0038] Please see Figure 3-5 The upper annular groove matches the surface shape of the diaphragm 6, and the diaphragm 6, the resonant striker 9, and the nozzle 10 are all on the same axis. A flexible protrusion 601 is fixedly connected to the lower surface of the diaphragm 6, and the sum of the heights of the diaphragm 6 and the flexible protrusion 601 matches the depth of the upper annular groove. The flexible protrusion 601 is a hemispherical protrusion, and multiple flexible protrusions 601 are arranged in a ring array around the geometric center of the diaphragm 6. The flexible protrusion 601 supports the diaphragm 6 and allows it to deform to a certain extent after receiving a shock wave. After the deformation, the resonant striker 9 moves toward the end closer to the nozzle 10.

[0039] Please see Figure 3-4 The seal 7 is located directly below the diaphragm 6, and the inner side of the seal 7 is integrally formed with a sleeve that matches the shape of the resonant striker 9. It directly contacts the diaphragm by isolating the glue and plays the role of pressing and protecting the diaphragm. The sleeve can effectively prevent the seal 7 from rolling up during the use of the equipment.

[0040] Please see Figure 4 The inner bottom surface of the volume chamber is designed as a funnel shape and coated with a smooth coating, which makes it easier for the glue in the volume chamber to flow to the nozzle, thereby ensuring that the nozzle gap is filled with enough glue for the current dispensing operation.

[0041] This solution allows for the following dispensing operations: During dispensing, the air inlet is maintained at a pressure of 0.3–0.7 MPa. The high-frequency solenoid valve quickly opens, allowing high-pressure air to flow into the shock tube connected to the atmosphere and rapidly expand, generating a high-speed, high-pressure shock wave. This shock wave impacts the diaphragm, causing it to deform slightly. This deformation then drives the resonant striker to move rapidly. The resonant striker quickly transfers momentum to the adhesive in the gap between itself and the nozzle, giving the adhesive velocity and allowing it to be rapidly ejected from the nozzle outlet. By stabilizing the generated shock wave and precisely controlling the number of shock waves produced by the high-frequency solenoid valve, the dispensing volume per unit time is controlled. During this process, the resonant striker does not directly impact the nozzle, reducing noise during equipment operation and ensuring that nozzle wear does not affect dispensing stability.

[0042] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A shock wave pulse type injection valve, comprising a lower valve body (1), wherein a volumetric cavity is formed within the lower valve body (1), characterized in that: The lower valve body (1) of the injection valve is provided with an upper valve body (2). The lower end of the upper valve body (2) of the injection valve is screwed with a gas connector (3). A shock tube (5) is screwed between the lower valve body (1) of the injection valve and the gas connector (3). A pair of annular grooves distributed vertically are opened in the shock tube (5). A diaphragm (6) is installed in the annular groove on the upper side, and a seal (7) is filled in the annular groove on the lower side. A glue inlet (8) is installed on the side wall of the lower valve body (1). A glue inlet (801) is provided on the glue inlet (8) and communicates with the volume cavity of the lower valve body (1). A resonance striker (9) is fixedly connected to the lower end of the diaphragm (6). The resonance striker (9) is located in the volume cavity of the lower valve body (1). A nozzle (10) is provided below the volume cavity.

2. The shock wave pulse injection valve according to claim 1, characterized in that: The upper valve body (2) of the injection valve and the air connector (3) are interconnected, and the contact surface of the upper valve body (2) and the air connector (3) is also provided with a sealing gasket that matches its shape. An air inlet (301) is installed on the side wall of the air connector (3).

3. The shock wave pulse injection valve according to claim 1, characterized in that: The shock tube (5) has an air intake chamber inside, and a silencer (11) is installed on the side wall of the air connector (3), and the silencer (11) is connected to the air intake chamber.

4. The shock wave pulse injection valve according to claim 1, characterized in that: The annular groove on the upper side matches the surface shape of the diaphragm (6), and the diaphragm (6), the resonant striker (9), and the nozzle (10) are all on the same axis.

5. A shock wave pulse injection valve according to claim 4, characterized in that: The lower surface of the diaphragm (6) is fixedly connected to a flexible protrusion (601), and the sum of the heights of the diaphragm (6) and the flexible protrusion (601) matches the depth of the annular groove on the upper side.

6. A shock wave pulse injection valve according to claim 5, characterized in that: The flexible protrusion (601) is a hemispherical protrusion, and multiple flexible protrusions (601) are distributed in a ring array around the geometric center of the diaphragm (6).

7. A shock wave pulse jet valve according to claim 1, characterized in that: The seal (7) is located directly below the diaphragm (6), and the inner side of the seal (7) is integrally formed with a sleeve that matches the shape of the resonant striker (9).

8. A shock pulse injection valve according to claim 1, characterized in that: The inner bottom surface of the volumetric cavity is funnel-shaped and coated with a smooth coating.

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