Piezoelectric jet valve and dispensing apparatus

Abstract

The utility model relates to the technical field of injection valve discloses a piezoelectric injection valve and point to the glue equipment, and piezoelectric injection valve includes shell, piezoelectric component, valve component, transmission part and cooling part, piezoelectric component installs in the shell, valve component installs in the shell, transmission part installs between piezoelectric component and valve component, and piezoelectric component controls the opening and closing of valve component through transmission part, cooling part installs in the shell, and cooling part is set up with cooling cavity, and piezoelectric component is worn in cooling part, and piezoelectric component part is located in cooling cavity, and cooling cavity is filled with coolant. Through above structure, can solve the process of piezoelectric injection valve high frequency opening and closing in the prior art, and piezoelectric component will continue to produce heat and be difficult to remove, resulting in the technical problem that piezoelectric component will continue to heat.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection valve technical field especially piezoelectric injection valve and point gum equipment. BACKGROUND

[0002] At present, point gum equipment can connect two objects by the way of injecting glue, and piezoelectric injection valve can be applied to point gum equipment.

[0003] In the related art, piezoelectric injection valve utilizes the characteristics of piezoelectric material to generate mechanical force through voltage, piezoelectric injection valve can include piezoelectric component made of valve and piezoelectric material, piezoelectric material can include piezoelectric ceramic, user can control the energization or non-energization of piezoelectric component to control the opening and closing of valve, piezoelectric injection valve can utilize high-frequency opening and closing to spray extremely small amount of liquid material at high speed.

[0004] However, in the process of high-frequency opening and closing of piezoelectric injection valve, heat will continuously generate at piezoelectric component and be difficult to dissipate, resulting in continuous temperature rise of piezoelectric component. SUMMARY

[0005] Embodiments of the utility model aim to provide a kind of piezoelectric injection valve and point gum equipment to solve the technical problem that piezoelectric component will continuously generate heat and be difficult to dissipate in the process of high-frequency opening and closing of piezoelectric injection valve in prior art, resulting in continuous temperature rise of piezoelectric component.

[0006] Embodiments of the utility model solve its technical problems using the following technical solutions:

[0007] One embodiment of the utility model provides a kind of piezoelectric injection valve, comprising:

[0008] Shell;

[0009] Piezoelectric component, the piezoelectric component is installed in the shell;

[0010] Valve component, the valve component is installed in the shell;

[0011] Transmission component, the transmission component is installed between the piezoelectric component and the valve component, and the piezoelectric component controls the opening and closing of the valve component through the transmission component;

[0012] Cooling component, the cooling component is installed in the shell, the cooling component is opened with cooling cavity, the piezoelectric component is arranged in the cooling component, and the piezoelectric component is partially located in the cooling cavity, and the cooling cavity is filled with cooling liquid.

[0013] In some embodiments, the cooling component includes a body, a first flexible seal, and a second flexible seal, the body is installed in the shell, and the body is opened with a cooling cavity.

[0014] The upper end of the body is provided with a first clearance hole, the lower end of the cooling component is provided with a second clearance hole, the upper end of the piezoelectric component extends out of the cooling cavity through the first clearance hole, the lower end of the piezoelectric component extends out of the cooling cavity through the second clearance hole and is connected to the transmission component; the first flexible sealing member is arranged between the piezoelectric component and the hole wall of the first clearance hole and seals the gap between the piezoelectric component and the hole wall of the first clearance hole; the second flexible sealing member is arranged between the piezoelectric component and the hole wall of the second clearance hole and seals the gap between the piezoelectric component and the hole wall of the second clearance hole.

[0015] In some embodiments, the transmission component comprises a rotating member and a first rotating shaft, the rotating member is rotatably connected to the shell through the first rotating shaft, one end of the rotating member is connected to the lower end of the piezoelectric component, and the other opposite end of the rotating member is connected to the valve component.

[0016] In some embodiments, the transmission component further comprises a second rotating shaft;

[0017] The valve component comprises a main body and a striker, the main body is installed in the shell, the main body is provided with a jet cavity, the jet cavity penetrates through opposite ends of the main body, one end of the striker extends into the jet cavity, and the other opposite end of the striker is rotatably connected to the rotating member through the second rotating shaft.

[0018] In some embodiments, the valve component further comprises an elastic reset member, the elastic reset member is arranged between the main body and the striker, and the elastic reset member can provide elastic force to the striker in the direction of extending out of the jet cavity.

[0019] In some embodiments, the number of piezoelectric components is two, and the two piezoelectric components are respectively located on opposite sides of the rotating axis of the first rotating shaft.

[0020] In some embodiments, the rotating member is provided with two inner grooves, and the two inner grooves are respectively located on opposite sides of the rotating axis of the first rotating shaft; the lower end of each piezoelectric component is arranged in a corresponding inner groove.

[0021] In some embodiments, the piezoelectric injection valve further includes an adjusting component, which includes an adjusting member, an elastic member, and an adjusting rod. The adjusting member is vertically movably mounted on the housing. The elastic member is disposed between the housing and the adjusting rod. The adjusting member and the elastic member are located on the upper and lower sides of the adjusting rod, respectively. The adjusting member and the elastic member together clamp one end of the adjusting rod. The upper end of the piezoelectric component is connected to the lower side of the adjusting rod. The piezoelectric component and the housing together clamp the other opposite end of the adjusting rod.

[0022] In some embodiments, the adjusting member includes an adjusting screw, the housing has a threaded hole that penetrates the housing, and the adjusting screw is threaded into the threaded hole.

[0023] Another embodiment of this utility model provides a dispensing device, including the piezoelectric jet valve in any of the above embodiments.

[0024] Compared to existing technologies, during operation, the piezoelectric injection valve utilizes a piezoelectric component that rapidly switches between energization and de-energization, enabling the valve to open and close at a high frequency. This allows the piezoelectric injection valve to eject a small amount of colloid with each pulse. The high-frequency switching between energization and de-energization generates significant heat. The piezoelectric component is housed within a cooling chamber filled with coolant. The heat generated by the piezoelectric component is rapidly absorbed by the coolant, preventing a sustained temperature increase and improving the operational stability and lifespan of the piezoelectric injection valve. Attached Figure Description

[0025] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings do not constitute a limitation on scale.

[0026] Figure 1 This is a side view of a dispensing device in one embodiment of this utility model;

[0027] Figure 2 yes Figure 1 A cross-sectional view of the dispensing equipment in the image;

[0028] Figure 3 yes Figure 1 A cross-sectional view of the cooling component of the dispensing equipment;

[0029] Figure 4 yes Figure 1 A partial sectional view of the piezoelectric jet valve of the dispensing equipment in the image;

[0030] Figure 5 yesFigure 1 A partial cross-sectional view of another part of the piezoelectric jet valve in the dispensing equipment;

[0031] Figure 6 yes Figure 1 A partial cross-sectional view of another part of the piezoelectric jet valve in the dispensing equipment.

[0032] Figure label:

[0033] 1000, Dispensing equipment; 100, Piezoelectric jet valve; 10, Housing; 102, Threaded hole; 20, Piezoelectric component; 30, Valve component; 32, Main body; 3202, Jetting chamber; 34, Impact pin; 36, Elastic reset component; 40, Transmission component; 42, Rotating component; 4202, Inner groove; 44, First rotating shaft; 46, Second rotating shaft; 50, Cooling component; 52, Main body; 5202, Cooling chamber; 5204, First clearance hole; 5206, Second clearance hole; 54, First flexible seal; 56, Second flexible seal; 60, Adjusting component; 62, Adjusting component; 64, Elastic component; 66, Adjusting rod; 200, Container. Detailed Implementation

[0034] To facilitate understanding of this utility model, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as "connected" to another element, it can be directly on the other element, or one or more intermediate elements can exist between them. The terms "upper," "lower," "left," "right," "upper end," "lower end," "top," and "bottom," etc., used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention.

[0036] The following detailed description, in conjunction with all the accompanying drawings, and through specific embodiments, illustrates a piezoelectric jet valve 100 and a dispensing device 1000 provided in this application.

[0037] Please refer to Figure 1 , Figure 2 and Figure 3One embodiment of this utility model discloses a dispensing device 1000, including a piezoelectric jet valve 100. The dispensing device 1000 may also include a frame and a container 200 for carrying the adhesive. Both the piezoelectric jet valve 100 and the container 200 for carrying the adhesive can be installed on the frame. The container 200 for carrying the adhesive is connected to the piezoelectric jet valve 100. The piezoelectric jet valve 100 can spray the adhesive in the container 200 for carrying the adhesive at a high frequency. The piezoelectric jet valve 100 can spray a small amount of adhesive each time.

[0038] The piezoelectric injection valve 100 may include a housing 10, a piezoelectric component 20, a valve component 30, a transmission component 40, and a cooling component 50; the piezoelectric component 20 is installed in the housing 10; the valve component 30 is installed in the housing 10; the transmission component 40 is installed between the piezoelectric component 20 and the valve component 30, and the piezoelectric component 20 controls the opening and closing of the valve component 30 via the transmission component 40; the cooling component 50 is installed in the housing 10, and the cooling component 50 has a cooling chamber 5202, the piezoelectric component 20 passes through the cooling component 50, and part of the piezoelectric component 20 is located in the cooling chamber 5202, which is filled with coolant.

[0039] With the above structure, during the operation of the piezoelectric injection valve 100, the piezoelectric component 20 switches between energization and de-energization at high speed, enabling the valve component 30 to open and close at high frequency, thus ensuring that the piezoelectric injection valve 100 can spray a small amount of colloid each time. The piezoelectric component 20 generates significant heat when switching between energization and de-energization at high frequency. The piezoelectric component 20 is installed within the cooling component 50, with a portion of it located within the cooling chamber 5202, which is filled with coolant. The heat generated by the piezoelectric component 20 is quickly absorbed by the coolant in the cooling chamber 5202, preventing the temperature of the piezoelectric component 20 from continuously rising, thereby improving the operational stability and service life of the piezoelectric injection valve 100.

[0040] Specifically, in this embodiment, the outer shell 10 may include a hollow shell structure, and the piezoelectric component 20, valve component 30, transmission component 40 and cooling component 50 may all be installed inside the outer shell 10; the piezoelectric component 20 may include a strip-shaped piezoelectric ceramic, and the number of piezoelectric components 20 may be two, and the extension direction of the piezoelectric component 20 may be perpendicular to the horizontal plane.

[0041] The valve component 30 can be located below the housing 10. The valve component 30 can include a main body 32 and a striking pin 34. The main body 32 can be integrally formed with the housing 10. The main body 32 has a vertically extending injection chamber 3202. The striking pin 34 is partially located inside the injection chamber 3202.

[0042] The transmission component 40 may include a rod-shaped rotating component 42. The piezoelectric component 20 can drive the rotating component 42 to rotate relative to the outer casing 10. The spray chamber 3202 can communicate with the container 200 for carrying the colloid. The rotating component 42 can drive the impact pin 34 to extend or extend into the spray chamber 3202. When the impact pin 34 extends into the spray chamber 3202, it can squeeze out a small amount of colloid. When the impact pin 34 extends out of the spray chamber 3202, the colloid in the container 200 for carrying the colloid is squeezed into the spray chamber 3202 under pressure.

[0043] The cooling component 50 may include a hollow structure similar to a cuboid. The cooling component 50 is disposed around the periphery of the piezoelectric component 20, and the cooling component 50 may adopt a flexible structure to abut against the surface of the piezoelectric component 20 so that the cooling cavity 5202 can be sealed.

[0044] In other embodiments, the housing 10 may also include other structures, such as a frame structure similar to a mounting bracket; the piezoelectric component 20 may also be made of other materials, such as crystalline materials; the transmission component 40 may also include other structures, such as a block-shaped pushing structure; the cooling component 50 may also include other structures, such as the cooling chamber 5202 being connected to an external coolant source to achieve coolant circulation.

[0045] In some embodiments, the cooling component 50 includes a body 52, a first flexible seal 54 and a second flexible seal 56. The body 52 is mounted on the housing 10 and has a cooling cavity 5202.

[0046] The upper end of the main body 52 is provided with a first clearance hole 5204, and the lower end of the cooling component 50 is provided with a second clearance hole 5206. The upper end of the piezoelectric component 20 extends out of the cooling cavity 5202 through the first clearance hole 5204, and the lower end of the piezoelectric component 20 extends out of the cooling cavity 5202 through the second clearance hole 5206 and is connected to the transmission component 40. The first flexible seal 54 is disposed between the piezoelectric component 20 and the hole wall of the first clearance hole 5204, and seals the gap between the piezoelectric component 20 and the hole wall of the first clearance hole 5204. The second flexible seal 56 is disposed between the piezoelectric component 20 and the hole wall of the second clearance hole 5206, and seals the gap between the piezoelectric component 20 and the hole wall of the second clearance hole 5206.

[0047] With the above structure, the upper end of the piezoelectric component 20 extends out of the cooling cavity 5202 through the first clearance hole 5204, and the upper end of the piezoelectric component 20 can be electrically connected to the power source. The lower end of the piezoelectric component 20 extends out of the cooling cavity 5202 through the second clearance hole 5206 and is connected to the transmission component 40, so that the piezoelectric component 20 can drive the transmission component 40 to move.

[0048] The first flexible seal 54 is disposed between the piezoelectric component 20 and the hole wall of the first clearance hole 5204, and seals the gap between the piezoelectric component 20 and the hole wall of the first clearance hole 5204; the second flexible seal 56 is disposed between the piezoelectric component 20 and the hole wall of the second clearance hole 5206, and seals the gap between the piezoelectric component 20 and the hole wall of the second clearance hole 5206; thereby improving the airtightness of the cooling chamber 5202 to avoid leakage of coolant in the cooling chamber 5202.

[0049] Specifically, in this embodiment, the body 52 may include a hollow structure made of plastic or other rigid materials. Both the upper and lower ends of the body 52 are provided with openings to form a first clearance hole 5204 and a second clearance hole 5206. The first flexible seal 54 and the second flexible seal 56 may both be made of rubber material. The first flexible seal 54 can compress and press against the piezoelectric component 20 and the hole wall of the first clearance hole 5204. The first flexible seal 54 can compress and press against the hole wall of the piezoelectric component 20 and the hole wall of the second clearance hole 5206.

[0050] The main body 52 can also be connected to a sensor for detecting the liquid level. The sensor is used to monitor the liquid level of the coolant in the cooling chamber 5202. When the coolant in the cooling chamber 5202 is insufficient, the user can return the piezoelectric injection valve 100 to the factory and add coolant.

[0051] In other embodiments, the cooling component 50 may also include other structures, such as the cooling component 50 being made entirely of a flexible material.

[0052] Please refer to Figure 4 and Figure 5 In some embodiments, the transmission component 40 includes a rotating component 42 and a first rotating shaft 44. The rotating component 42 is rotatably connected to the housing 10 via the first rotating shaft 44. One end of the rotating component 42 is connected to the lower end of the piezoelectric component 20, and the other opposite end of the rotating component 42 is connected to the valve component 30.

[0053] With the above structure, the rotating member 42 is rotatably connected to the outer shell 10 via the first rotating shaft 44, and one end of the rotating member 42 is connected to the lower end of the piezoelectric component 20. During the switching between the energized and de-energized states, the piezoelectric component 20 can repeatedly extend or shorten to drive the rotating member 42 to move up and down repeatedly at the end connected to the piezoelectric component 20, so that the rotating member 42 can rotate repeatedly relative to the outer shell 10, thereby driving the valve component 30 to open and close repeatedly.

[0054] Specifically, in this embodiment, there are two piezoelectric components 20. The two piezoelectric components 20 are located on opposite sides of the first rotating shaft 44. The lower ends of the two piezoelectric components 20 abut against the rotating member 42. The two piezoelectric components 20 work alternately, that is, when one piezoelectric component 20 is de-energized, the other piezoelectric component 20 is energized, so that the two piezoelectric components 20 can drive the rotating member 42 to reciprocate relative to the outer shell 10 with a certain amplitude.

[0055] In other embodiments, the number of piezoelectric components 20 may be one, the lower end of the piezoelectric component 20 may abut against the end of the rotating component 42, and a torsion spring may be installed on the first rotating shaft 44 to allow the rotating component 42 to reset after rotation.

[0056] In some embodiments, the transmission component 40 further includes a second rotating shaft 46; the valve component 30 includes a main body 32 and a striking pin 34. The main body 32 is mounted on the housing 10. The main body 32 has a spray chamber 3202, which extends through the opposite ends of the main body 32. One end of the striking pin 34 extends into the spray chamber 3202, and the other opposite end of the striking pin 34 is rotatably connected to the rotating component 42 via the second rotating shaft 46.

[0057] With the above structure, the other opposite end of the firing pin 34 is rotatably connected to the rotating member 42 via the second rotating shaft 46, so that there is no relative sliding between the firing pin 34 and the transmission member 40, thereby reducing the friction between the firing pin 34 and the transmission member 40, thus reducing the wear of the pin and the transmission member 40 and improving the service life of the piezoelectric injection valve 100.

[0058] Specifically, in this embodiment, the second rotating shaft 46 can be partially embedded in the lower side of the transmission component 40, the second rotating shaft 46 and the transmission component 40 can be fixed to each other, and the second rotating shaft 46 and the firing pin component 34 can rotate to each other by means of hinge or bearing connection.

[0059] In other embodiments, the second rotating shaft 46 and the transmission component 40 may also rotate relative to each other by means of hinge or bearing connection, and the second rotating shaft 46 and the firing pin component 34 may be fixed to each other.

[0060] In some embodiments, the valve component 30 further includes an elastic reset member 36, which is disposed between the body 32 and the ejector pin 34. The elastic reset member 36 is capable of providing elastic force to the ejector pin in the direction of extending out of the injection chamber 3202.

[0061] With the above structure, during the process of the ejector pin 34 extending out of the injection chamber 3202, the elastic reset member 36 can provide elastic force, so that the ejector pin 34 can quickly extend out of the injection chamber 3202 and the ejector pin 34 can move to the position of extending out of the injection chamber 3202 more quickly, thereby increasing the working frequency of the ejector pin 34.

[0062] Specifically, the spray cavity 3202 may include an elongated cylindrical structure, one side of which may be connected to the container 200 for carrying the colloid, and the spray cavity 3202 may extend through the upper and lower sides of the main body 32; the impact pin 34 may include an end cap and an elongated columnar structure, the end cap of the impact pin 34 may be connected to the second rotating shaft 46, the size of the elongated columnar structure of the impact pin 34 may be adapted to the size of the spray cavity 3202, and the size of the end cap of the impact pin 34 may be larger than the size of the spray cavity 3202, so as to keep the end cap of the impact pin 34 always outside the spray cavity 3202; the elastic reset member 36 may include a spring, the elastic reset member 36 may be sleeved on the cavity wall of the spray cavity 3202, and the two ends of the elastic reset member 36 respectively abut against the end cap of the impact pin 34 and the outer shell 10.

[0063] In some embodiments, there are two piezoelectric components 20, which are located on opposite sides of the rotation axis of the first rotation shaft 44.

[0064] With the above structure, the two piezoelectric components 20 can work in a staggered manner, and when one piezoelectric component 20 is energized, the other piezoelectric component 20 is de-energized, so that when one piezoelectric component 20 extends, the other piezoelectric component 20 shortens. The piezoelectric components 20 only need to push the rotating component 42 in turn, without pulling the rotating component 42, so as to avoid the piezoelectric component 20 being subjected to opposite forces in a short period of time, thereby improving the service life of the piezoelectric component 20 and the rotating component 42.

[0065] Specifically, in this embodiment, the extension direction of the rotating member 42 can be perpendicular to the rotation axis of the first rotating shaft 44; the rotating member 42 is provided with an inner groove 4202, and the lower end of each piezoelectric component 20 is placed in a corresponding inner groove 4202.

[0066] In other embodiments, the lower end of the piezoelectric component 20 may also directly abut against the upper side of the rotating component 42.

[0067] In some embodiments, the rotating member 42 has two inner grooves 4202, which are located on opposite sides of the rotation axis of the first rotating shaft 44; the lower end of each piezoelectric member 20 is disposed in a corresponding inner groove 4202.

[0068] With the above structure, the lower end of each piezoelectric component 20 is disposed in a corresponding inner groove 4202. The inner groove 4202 plays a lateral positioning role for the corresponding piezoelectric component 20, so as to prevent the lower end of the piezoelectric component 20 from sliding relative to the rotating rod during the process of the piezoelectric component 20 pushing the rotating rod, thereby improving the stability of the piezoelectric injection valve 100 in this embodiment during operation.

[0069] Specifically, the lower end of the piezoelectric component 20 can have a structure similar to an arc surface, and correspondingly, the groove wall of the inner groove 4202 can also have an arc surface structure.

[0070] Please refer to Figure 6 In some embodiments, the piezoelectric injection valve 100 further includes an adjusting component 60, which includes an adjusting member 62, an elastic member 64, and an adjusting rod 66. The adjusting member 62 is vertically movably mounted on the housing 10, and the elastic member 64 is disposed between the housing 10 and the adjusting rod 66. The adjusting member 62 and the elastic member 64 are respectively located on the upper and lower sides of the adjusting rod 66. The adjusting member 62 and the elastic member 64 together clamp one end of the adjusting rod 66. The upper end of the piezoelectric component 20 is connected to the lower side of the adjusting rod 66, and the piezoelectric component 20 and the housing 10 together clamp the other opposite end of the adjusting rod 66.

[0071] With the above structure, the user can adjust the position of the adjusting member 62 relative to the outer shell 10 to adjust the height of the end of the adjusting rod 66 that is clamped by the adjusting member 62 and the elastic member 64, thereby adjusting the height of the upper end of the piezoelectric component 20, and thus adjusting the initial angle of the rotating rod to a preset angle, so that the piezoelectric injection valve 100 in this embodiment can work more stably.

[0072] Specifically, in this embodiment, the adjusting member 62 may include a thread, the elastic member 64 may include a compression spring, and the adjusting rod 66 may include a straight rod structure similar to a strip; the housing 10 may include a block-shaped member protruding toward the piezoelectric member 20, and the block-shaped member of the housing 10 may clamp the end of the adjusting rod 66 together with the piezoelectric member 20.

[0073] In other embodiments, the adjusting member 62 may also include other structures, such as a latching block that can be engaged with the housing 10; the elastic member 64 may also include other structures, such as a spring.

[0074] In some embodiments, the adjusting member 62 includes an adjusting screw, the housing 10 has a threaded hole 102 that penetrates the housing 10, and the adjusting screw is threaded into the threaded hole 102.

[0075] With the above structure, the adjusting component 62 includes an adjusting screw, which can be turned by the user from the outside of the housing 10, making the operation of the adjusting component 62 more convenient; in addition, the adjusting screw can achieve stepless adjustment.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; under the concept of this utility model, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of this utility model as described above. For the sake of brevity, they are not provided in detail; although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A piezoelectric injection valve, characterized in that, include: shell; A piezoelectric component, the piezoelectric component being mounted on the housing; A valve component, which is mounted on the housing; A transmission component is installed between the piezoelectric component and the valve component, and the piezoelectric component controls the opening and closing of the valve component via the transmission component; A cooling component is installed on the housing and has a cooling cavity. A piezoelectric component is inserted through the cooling component and is partially located inside the cooling cavity, which is filled with coolant.

2. The piezoelectric injection valve according to claim 1, characterized in that, The cooling component includes a body, a first flexible seal, and a second flexible seal. The body is mounted on the outer casing and has a cooling cavity. The upper end of the main body is provided with a first clearance hole, and the lower end of the cooling component is provided with a second clearance hole. The upper end of the piezoelectric component extends out of the cooling cavity through the first clearance hole, and the lower end of the piezoelectric component extends out of the cooling cavity through the second clearance hole and is connected to the transmission component. The first flexible seal is disposed between the piezoelectric component and the hole wall of the first clearance hole, and seals the gap between the piezoelectric component and the hole wall of the first clearance hole. The second flexible seal is disposed between the piezoelectric component and the hole wall of the second clearance hole, and seals the gap between the piezoelectric component and the hole wall of the second clearance hole.

3. The piezoelectric injection valve according to claim 2, characterized in that, The transmission component includes a rotating component and a first rotating shaft. The rotating component is rotatably connected to the housing via the first rotating shaft. One end of the rotating component is connected to the lower end of the piezoelectric component, and the other opposite end of the rotating component is connected to the valve component.

4. The piezoelectric injection valve according to claim 3, characterized in that, The transmission component also includes a second rotating shaft; The valve component includes a body and a striking pin. The body is mounted on the housing and has a spray chamber that extends through opposite ends of the body. One end of the striking pin extends into the spray chamber, and the other opposite end of the striking pin is rotatably connected to the rotating component via the second rotating shaft.

5. The piezoelectric injection valve according to claim 4, characterized in that, The valve component also includes an elastic reset member disposed between the main body and the firing pin component. The elastic reset member is capable of providing elastic force to the firing pin in the direction of extending out of the injection chamber.

6. The piezoelectric injection valve according to claim 3, characterized in that, The number of piezoelectric components is two, and the two piezoelectric components are respectively located on opposite sides of the rotation axis of the first rotating shaft.

7. The piezoelectric injection valve according to claim 6, characterized in that, The rotating component has two inner grooves, which are located on opposite sides of the rotation axis of the first rotating shaft; the lower end of each piezoelectric component is disposed in a corresponding inner groove.

8. The piezoelectric injection valve according to claim 6, characterized in that, It also includes an adjustment component, which includes an adjustment member, an elastic member, and an adjustment rod. The adjustment member is vertically and movably mounted on the housing. The elastic member is disposed between the housing and the adjustment rod. The adjustment member and the elastic member are located on the upper and lower sides of the adjustment rod, respectively. The adjustment member and the elastic member together clamp one end of the adjustment rod. The upper end of the piezoelectric member is connected to the lower side of the adjustment rod. The piezoelectric member and the housing together clamp the other opposite end of the adjustment rod.

9. The piezoelectric injection valve according to claim 8, characterized in that, The adjusting component includes an adjusting screw, and the housing has a threaded hole that penetrates the housing. The adjusting screw is threaded into the threaded hole.

10. A dispensing device, characterized in that, Includes the piezoelectric injection valve as described in any one of claims 1-9.

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