Dual-drive piezoelectric valve

Abstract

The utility model relates to the technical field of dispensing, in particular to a dual-drive piezoelectric valve which comprises a valve body and a fluid seat, the fluid seat is mounted on the valve body, and a nozzle is arranged on the fluid seat; the lever is arranged in the valve body, and the lever swings by taking a supporting part arranged in the valve body as a fulcrum; the two actuating assemblies are arranged in the valve body, each actuating assembly comprises an abutting part, and the two abutting parts alternately move towards or away from the lever so as to drive the lever to swing; and the firing pin is arranged on the fluid seat, the firing pin abuts against the bottom of the lever, and the firing pin can stretch into the nozzle to control the nozzle to discharge glue. The two actuating assemblies located on the two sides of the lever supporting part alternately work to control the lever to swing stably, and the swing stability of the lever and the precision that the lever pushes the firing pin to move are improved.

Description

Technical Field

[0001] This application relates to the field of dispensing technology, and more particularly to a dual-drive piezoelectric valve. Background Technology

[0002] In the field of dispensing technology, piezoelectric jet valves are commonly used to perform dispensing operations. A typical single piezoelectric jet valve mainly includes a piezoelectric ceramic drive assembly, a lever, a spring, a striker, and a dispensing assembly. The piezoelectric ceramic drive assembly and the spring are located on both sides of the rotating part of the lever, enabling the lever to swing up and down. The striker works in conjunction with the dispensing assembly, and the lever drives the striker to swing up and down, thereby controlling the opening and closing of the dispensing assembly.

[0003] However, if the lever is oscillating up and down using only a single piezoelectric ceramic drive component and a spring, the spring is prone to fatigue after long-term use, which can affect the return oscillation of the lever. This, in turn, affects the precise control of the glue supply component and the stability of the spray valve. Utility Model Content

[0004] This utility model aims to solve at least one of the technical problems existing in the prior art.

[0005] Therefore, this utility model provides a dual-drive piezoelectric valve, which uses two actuation components located on both sides of the lever support to work alternately to control the stable swing of the lever, thereby improving the stability of the lever swing and the accuracy of the lever driving the striker to move.

[0006] The dual-drive piezoelectric valve according to an embodiment of the present invention includes,

[0007] Valve body, and

[0008] A fluid seat is mounted on the valve body, and a nozzle is provided on the fluid seat;

[0009] A lever, which is disposed in the valve body, and swings about a support disposed in the valve body as a fulcrum;

[0010] Two actuation components are disposed in the valve body, each actuation component including an abutment portion, the two abutment portions moving alternately toward or away from the lever to drive the lever to swing;

[0011] A striking pin is disposed on the fluid seat and abuts against the bottom of the lever. The striking pin can extend into the nozzle to control the dispensing of adhesive from the nozzle.

[0012] The beneficial effect of this utility model is that by setting an actuation component on each side of the lever support, the lever can be reciprocated and oscillated by the alternating operation of the two actuation components, thereby improving the stability of the lever's reciprocating and oscillating motion.

[0013] According to one embodiment of the present invention, the head position of the striking pin for abutting the lever is set as a plane, and the part of the lever for abutting the striking pin is set as an arc-shaped spherical surface.

[0014] According to one embodiment of the present invention, the actuation component further includes,

[0015] A driving component is disposed within the valve body, and the abutting portion is connected to the end of the driving component facing the lever.

[0016] A control element extends through the top of the valve body and abuts against the top of the drive element via a spherical body.

[0017] According to one embodiment of the present invention, a mounting groove is provided in the valve body, the driving member is disposed in the mounting groove, and a reset member is sleeved on the abutting part, the two ends of the reset member abutting against the driving member and the side wall of the mounting groove near the lever, respectively.

[0018] According to one embodiment of the present invention, the valve body is provided with a rod groove for accommodating the lever, and a stabilizing member is provided between the top and bottom of the lever and the rod groove. The stabilizing member is elastic and is used to provide cushioning for the swing of the lever.

[0019] According to one embodiment of the present invention, the stabilizer is positioned close to the striker.

[0020] According to one embodiment of the present invention, a guide sleeve is provided on the fluid seat, the guide sleeve is inserted into the bottom of the valve body, the rod of the striker is located through the guide sleeve and slides in cooperation with the guide sleeve, the head of the striker is located on the side of the guide sleeve near the lever, and an elastic element is provided between the head of the striker and the guide sleeve.

[0021] According to one embodiment of the present invention, the fluid seat is detachably connected to the valve body.

[0022] According to one embodiment of the present invention, the bottom of the valve body is provided with a mounting portion for connecting the fluid seat. The mounting portion includes an extension portion and a connecting portion. The extension portion is connected to the connecting portion and inserted into the bottom of the valve body. The extension portion is provided with a mounting hole for inserting the guide sleeve and the impact pin. The top of the extension portion is provided with a threaded hole. An adjusting rod is threadedly connected to the top of the valve body. The lower end of the adjusting rod is threadedly connected to the threaded hole. The connecting portion is used to install the fluid seat.

[0023] According to one embodiment of the present invention, the valve body is provided with a cover for shielding the mounting groove. The cover is provided with a cooling structure, which includes an air inlet end, an air outlet end, an air inlet passage, and an air outlet passage. The air inlet end and the air outlet end are both connected to the cover. The air inlet passage is used to connect the air inlet end to the mounting groove, and the air outlet passage is used to connect the air outlet end to the mounting groove. The connection between the air inlet passage and the mounting groove is located near the bottom of the mounting groove, and the connection between the air outlet passage and the mounting groove is located near the top of the mounting groove.

[0024] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description, claims, and drawings.

[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] Figure 1 This is a schematic diagram of the overall structure of the dual-drive piezoelectric valve in this utility model.

[0028] Figure 2 This is a schematic diagram of the valve body in this utility model.

[0029] Figure 3 This is a structural diagram showing the positions of the air intake and air outlet in this utility model.

[0030] Figure 4 This is a schematic diagram of the actuation component and lever in this utility model.

[0031] Figure 5 It is used to embody Figure 4 Enlarged view of part A showing the positional relationship between the middle lever and the firing pin.

[0032] Figure 6 This is a structural schematic diagram of the assembly relationship between the valve body, the connecting part and the fluid seat in this utility model.

[0033] Figure 7 This is a schematic diagram of the connecting part in this utility model.

[0034] Figure 8 This is a schematic diagram of the fluid seat in this utility model.

[0035] Figure 9This is a schematic diagram of the structure of the fluid seat and the connecting part before assembly in this utility model.

[0036] Figure 10 This is a top view of the positional relationship between the fluid seat and the connecting part before assembly in this utility model.

[0037] In the diagram: 1. Valve body; 11. Mounting groove; 12. Rod groove; 13. Positioning hole; 14. Sealing plate; 15. Cover; 151. Air inlet; 152. Air outlet; 16. Air inlet end; 17. Air outlet end; 18. Adjusting rod; 19. Positioning block; 2. Mounting part; 21. Extension part; 22. Connecting part; 23. First hook; 24. Positioning part; 25. Second hook; 26. Baffle; 27. Installation... 28. Mounting hole; 29. ​​Clearance groove; 3. Positioning groove; 30. Fluid seat; 31. Guide sleeve; 32. Impact pin; 33. Elastic element; 34. First locking block; 35. Second locking hook; 36. Limiting protrusion; 37. Abutment block; 48. Actuation assembly; 49. Driving element; 40. Abutment part; 41. Control element; 42. Spherical body; 43. Reset element; 44. Support part; 5. Lever; 6. Stabilizing element; 7. Push rod. Detailed Implementation

[0038] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0039] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, 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, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0040] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] Reference Figure 1 , 2 A dual-drive piezoelectric valve includes a fluid seat 3, a valve body 1, a striker 32, and an actuation mechanism. The actuation mechanism is disposed within the valve body 1. The fluid seat 3 is detachably mounted on the bottom of the valve body 1. The fluid seat 3 has a fluid cavity and a flow channel connected to the fluid cavity. A seal is also provided between the fluid cavity and the valve body 1. The striker 32 is disposed on the fluid seat 3 and passes through the seal, slidingly engaging with the seal along its axial direction. The valve body 1 has a positioning hole 13 for accommodating the striker 32. The actuation mechanism controls the striker 32 to move axially within the positioning hole 13, allowing the striker 32 to pass through the seal and extend into a nozzle disposed on the fluid seat 3, so that solder paste stored in the fluid cavity is ejected from the nozzle.

[0042] Specifically, the actuation mechanism includes two actuation components 4 and a lever 6. The valve body 1 is provided with a mounting groove 11 and a rod groove 12. The rod groove 12 is located between the mounting groove 11 and the positioning hole 13 and is connected to both the mounting groove 11 and the positioning hole 13. The actuation components 4 are disposed in the mounting groove 11 and the lever 6 is disposed in the rod groove 12.

[0043] Each actuation component 4 includes a control element 43, a ball 44, a reset element 45, and a drive element 41. The control element 43 is located at the top of the valve body 1. The control element 43 extends through the top of the valve body 1 into the mounting groove 11 and abuts against the top of the drive element 41 via the ball 44. The drive element 41 has an abutment portion 42 at one end facing the rod groove 12. The abutment portion 42 extends into the rod groove 12 and abuts against the top surface of the lever 6. The top surface of the lever 6 has an arc-shaped groove that matches the abutment portion 42. The reset element 45 is sleeved on the abutment portion 42 and is located between the bottom surface of the drive element 41 and the side wall of the mounting groove 11 near the lever 6. The control element 43 presses down to drive the drive element 41 to move along the axial direction of the striker 32 toward the lever 6, pressing against the lever 6. The reset element 45 is a disc spring, and its elasticity controls the reset of the drive element 41.

[0044] Reference Figure 4 , 5A support portion 5 is provided inside the valve body 1. The support portion 5 abuts against the bottom of the lever 6 and is located between two abutting portions 42. Thus, when the two driving members 41 alternately press against the lever 6, the lever 6 can swing back and forth about the support portion 5 as the axis. The striking pin 32 abuts against the bottom of the end of the lever 6 away from the abutting portion 42. Preferably, a stabilizing member 7 is provided between the top and bottom of the lever 6 and the rod groove 12. The stabilizing member 7 is located between the striking pin 32 and the support portion 5 and is close to the striking pin 32. The stabilizing member 7 is elastic. In this embodiment, the stabilizing member 7 is a spring. The stabilizing member 7 can play a certain buffering and protective role for the swing of the lever 6 and improve the stability of the lever 6. Specifically, the stabilizing member 7 is located on the side closer to the striking pin 32. When the lever 6 swings, the pressure on the stabilizing member 7 is smaller, so the force of the stabilizing member 7 acting on the lever 6 is smaller, thereby improving the stability of the lever 6 and increasing the service life of the stabilizing member 7.

[0045] It should be noted that the end of the support part 5 that abuts against the lever 6 is set with a sharp corner, so that the support part 5 and the lever 6 have line contact. This results in less friction between the support part 5 and the lever 6, and the force of the lever 6 swinging is transmitted to the striker 32 more efficiently, ensuring the displacement and force transmission of the striker 32. Furthermore, a push rod 8 is provided on the side wall of the valve body 1. The push rod 8 is used to fix the support part 5 and prevent the support part 5 from loosening.

[0046] Furthermore, refer to Figure 3 The valve body 1 is provided with a sealing plate 14 for shielding the rod groove 12 and a cover 15 for shielding the mounting groove 11. The sealing plate 14 and the cover 15 can be integrally formed. The cover 15 is provided with a cooling structure, which includes an air inlet end 16, an air outlet end 17, an air inlet channel 151, and an air outlet channel 152. The air inlet end 16 and the air outlet end 17 are both connected to the top of the cover 15. The air inlet channel 151 is used to connect the air inlet end 16 and the mounting groove 11, and the air outlet channel 152 is used to connect the air outlet end 17 and the mounting groove 11. The connection between the air inlet channel 151 and the mounting groove 11 is located near the bottom of the mounting groove 11, and the connection between the air outlet channel 152 and the mounting groove 11 is located near the top of the mounting groove 11. After the cooling gas or air enters the mounting groove 11, the heat in the mounting groove 11 is discharged from the bottom through the air outlet channel 152 at the top, thereby improving the cooling effect.

[0047] Reference Figure 6 According to one embodiment of the present invention, the fluid seat 3 is detachably installed at the bottom of the valve body 1, and the bottom of the valve body 1 is provided with a mounting part 2 for connecting the fluid seat 3.

[0048] Reference Figure 7The mounting part 2 includes an extension part 21 and a connecting part 22. Specifically, the extension part 21 is inserted into the positioning hole 13 at the bottom of the valve body 1. The extension part 21 has a mounting hole 27 and a threaded hole at its top. An adjusting rod 18 is threadedly connected to the top of the valve body 1. The lower end of the adjusting rod 18 can be threadedly connected to the threaded hole. The extension part 21 can be adjusted up and down by rotating the adjusting rod 18. Furthermore, a boss is provided on the adjusting rod 18, and a spring is provided between the boss and the top of the extension part 21.

[0049] An avoidance groove 28 communicating with the mounting hole 27 is provided on the side of the extension 21. The avoidance groove 28 connects the mounting hole 27 and the rod groove 12, so that the lever 6 passes through the avoidance groove 28 and abuts against the striker 32. A positioning groove 29 is provided on the side of the extension 21 away from the avoidance groove 28. The positioning groove 29 is located above the mounting hole 27. A positioning block 19 is provided in the positioning hole 13 inside the valve body 1. A positioning pin is provided on the outer side wall of the valve body 1. The positioning pin is connected to the positioning block 19. When the extension 21 is inserted into the positioning hole 13, the positioning pin controls the positioning block 19 to insert into the positioning groove 29 to limit the extension.

[0050] The connecting part 22 is connected to the extension part 21 and is located at the lower end of the valve body 1. The connecting part 22 can be used to connect with the fluid seat 3. The connecting part 22 has a through hole that is coaxial with and communicates with the mounting hole 27. Optionally, the upper end of the connecting part 22 is provided with a positioning part 24, and the valve body 1 is provided with a positioning groove that cooperates with the positioning part 24. When the connecting part 22 is assembled with the valve body 1, at least a part of the positioning part 24 can be inserted into the positioning groove to improve the positioning effect and installation stability.

[0051] Reference Figure 8 A guide sleeve 31 is connected inside the fluid seat 3. The rod of the impact pin 32 coaxially passes through the guide sleeve 31 and slides along its axial direction. The guide sleeve 31 can be inserted into the mounting hole 27 and is sealed between it and the mounting hole 27. The head of the impact pin 32 abuts against the bottom surface of the end of the lever 6. The head of the impact pin that abuts against the lever is set as a plane, and the part of the lever that abuts against the impact pin is set as an arc-shaped spherical surface. An elastic element 33 is provided between the guide sleeve 31 and the head of the impact pin 32. The elastic element 33 is a spring. Under the elastic support of the elastic element 33, the head of the impact pin 32 always remains in contact with the end of the lever 6. The end of the lever 6 that abuts against the impact pin 32 swings downward, pushing the impact pin 32 toward the nozzle. Under the elastic action of the elastic element 33, the impact pin 32 moves away from the nozzle and returns to its original position.

[0052] The fluid seat 3 is provided with a first locking block 34, which extends toward the driving member 41. The connecting part 22 is provided with a first hook 23 that is adapted to the first locking block 34. The fluid seat 3 and the connecting part 22 are engaged by the cooperation of the first locking block 34 and the first hook 23. The connecting part 22 is provided with a second locking block 25 in the direction away from the driving member 41. When the extension part 21 is inserted into the positioning hole 13, the second locking block 25 protrudes from the side wall of the valve body 1 away from the driving member 41. The fluid seat 3 is provided with a second hook 35, and the second locking block 25 cooperates with the second hook 35.

[0053] Furthermore, a stop block 37 is connected to the bottom of the valve body 1 via a spring. A through hole is provided on the connecting part 22 for the spring to pass through. When the spring is in its natural state, the end of the stop block 37 connected to the spring is located inside the through hole and near one end of the fluid seat 3, while the end of the stop block 37 away from the spring is outside the through hole. A recessed groove is provided on the side wall of the fluid seat 3 opposite to the through hole. A limiting protrusion 36 is provided on one side of the recessed groove. When the fluid seat 3 is assembled with the connecting part 22, the limiting protrusion 36 is located on one side of the stop block 37. The top of the limiting protrusion 36 is designed to be arc-shaped, protruding towards the connecting part 22, and the stop block 37 abuts against one side of the limiting protrusion 36. When the fluid seat 3 is assembled with the connecting part 22, a baffle 26 is hinged to the side wall of the connecting part 22. The baffle 26 and the limiting protrusion 36 are located on opposite sides of the stop block 37.

[0054] When assembling the connecting part 22, the fluid seat 3, and the valve body 1, the first step is to insert the extension 21 into the positioning hole 13. The relative distance between the connecting part 22 and the valve body 1 is adjusted by using the adjusting rod 18 in conjunction with the threaded hole at the top of the extension. Then, the positioning block 19 is inserted into the positioning groove 29 to position the extension. The second step is to insert the guide sleeve 31 and the striking pin 32 into the mounting hole 27 on the extension 21. At this point, the fluid seat 3 and the connecting part 22 are interleaved. (Refer to...) Figure 9 , 10 Third step, rotate fluid seat 3 (refer to...) Figure 10 In the direction of rotation F), the first locking block 34 and the first locking hook 23 are inserted and locked together, the second locking block 25 and the second locking hook 35 are inserted and locked together, the upper limit protrusion 36 of the fluid seat 3 moves toward the abutment block, the baffle 26 rotates and abuts against the side wall of the fluid seat 3, at this time the abutment block 37 abuts against one side of the limiting protrusion 36, the limiting protrusion 36 and the baffle 26 form a force that opposes each other, so that the fluid seat 3 and the connecting part 22 are stably connected.

[0055] The implementation principle of this application is as follows:

[0056] Two drive members 41 alternately press against the lever 6, which can swing back and forth with the support 5 as the fulcrum. The end of the lever 6 away from the abutment part 42 abuts against the head of the striker 32, controlling the striker 32 to move back and forth along the axial direction of the guide sleeve 31. The striker 32 passes through the seal and extends into the nozzle provided on the fluid seat 3, so that the solder paste stored in the fluid cavity is sprayed out from the nozzle.

[0057] This application controls the lever 6 to swing back and forth in a regular manner by setting up dual actuation components 4. In this structure, the reset of the lever 6 does not rely on the spring structure. The two actuation components 4 work alternately to control the lever 6 to swing stably, thereby improving the stability of the lever 6 swing and the accuracy of the lever 6 in pushing the striker 32 to move.

[0058] Furthermore, this application provides stabilizers 7 on both the upper and lower sides of the lever 6 to provide a certain buffering and protection against the swing of the lever 6, thereby improving the stability of the lever 6. The stabilizers 7 are located on the side closer to the striker 32. When the lever 6 swings, the stabilizers 7 are subjected to less pressure, and thus the force of the stabilizers 7 acting on the lever 6 is smaller, thereby improving the stability of the lever 6 and increasing the service life of the stabilizers 7.

[0059] In this application, the striking pin 32 abuts against the end of the lever 6. Compared with connection methods such as hinges, the assembly method between the striking pin 32 and the lever 6 is simple, the assembly difficulty and structural processing difficulty are small, and the striking pin 32 is less affected by the shear force generated by the swing of the lever 6, thereby ensuring the stability of the striking pin 32 along its axial movement and improving the service life of the striking pin 32.

[0060] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0061] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined by the scope of the claims.

Claims

1. A dual-drive piezoelectric valve, characterized in that, include, Valve body (1), and A fluid seat (3) is mounted on the valve body (1) and a nozzle is provided on the fluid seat (3); Lever (6), the lever (6) is disposed inside the valve body (1), and the lever (6) swings about the support (5) disposed inside the valve body (1) as the fulcrum; Two actuation components (4) are disposed in the valve body (1), each actuation component (4) includes an abutment portion (42), the two abutment portions (42) move alternately toward or away from the lever (6) to drive the lever (6) to swing; A striking pin (32) is disposed on the fluid seat (3). The striking pin (32) abuts against the bottom of the lever (6). The striking pin (32) can extend into the nozzle to control the dispensing of adhesive from the nozzle.

2. The dual-drive piezoelectric valve according to claim 1, characterized in that, The head of the striker (32) that abuts against the lever (6) is set as a plane, and the part of the lever (6) that abuts against the striker (32) is set as an arc-shaped spherical surface.

3. The dual-drive piezoelectric valve according to claim 1, characterized in that, The actuation component (4) also includes, A drive member (41) is disposed inside the valve body (1), and the abutment part (42) is connected to one end of the drive member (41) facing the lever (6); The control element (43) extends through the top of the valve body (1) and abuts against the top of the drive element (41) via a spherical body (44).

4. The dual-drive piezoelectric valve according to claim 3, characterized in that, The valve body (1) is provided with an installation groove (11), the drive member (41) is provided in the installation groove (11), and a reset member (45) is sleeved on the abutment part (42). The two ends of the reset member (45) abut against the drive member (41) and the side wall of the installation groove (11) near the lever (6), respectively.

5. The dual-drive piezoelectric valve according to claim 1, characterized in that, The valve body (1) is provided with a rod groove (12) for accommodating the lever (6). A stabilizing member (7) is provided between the top and bottom of the lever (6) and the rod groove (12). The stabilizing member (7) is elastic and is used to provide a buffer for the swing of the lever (6).

6. The dual-drive piezoelectric valve according to claim 5, characterized in that, The stabilizer (7) is positioned close to the striker (32).

7. The dual-drive piezoelectric valve according to claim 1, characterized in that, A guide sleeve (31) is provided on the fluid seat (3). The guide sleeve (31) is inserted into the bottom of the valve body (1). The rod of the striker (32) is located through the guide sleeve (31) and slides with the guide sleeve (31). The head of the striker (32) is located on the side of the guide sleeve (31) close to the lever (6). An elastic element (33) is provided between the head of the striker (32) and the guide sleeve (31).

8. The dual-drive piezoelectric valve according to claim 7, characterized in that, The fluid seat (3) is detachably connected to the valve body (1).

9. The dual-drive piezoelectric valve according to claim 8, characterized in that, The valve body (1) has a mounting part (2) at the bottom for connecting the fluid seat (3). The mounting part (2) includes an extension part (21) and a connecting part (22). The extension part (21) is connected to the connecting part (22) and inserted into the bottom of the valve body (1). The extension part (21) has a mounting hole (27) for inserting the guide sleeve (31) and the impact pin (32). The extension part (21) has a threaded hole at the top. The valve body (1) has an adjusting rod (18) threadedly connected to the top. The lower end of the adjusting rod (18) is threadedly connected to the threaded hole. The connecting part (22) is used to install the fluid seat (3).

10. The dual-drive piezoelectric valve according to claim 4, characterized in that, The valve body (1) is provided with a cover (15) for shielding the mounting groove (11). The cover (15) is provided with a cooling structure, which includes an air inlet (16), an air outlet (17), an air inlet channel (151), and an air outlet channel (152). The air inlet (16) and the air outlet (17) are both connected to the cover (15). The air inlet channel (151) is used to connect the air inlet (16) and the mounting groove (11). The air outlet channel (152) is used to connect the air outlet (17) and the mounting groove (11). The connection between the air inlet channel (151) and the mounting groove (11) is located near the bottom of the mounting groove (11). The connection between the air outlet channel (152) and the mounting groove (11) is located near the top of the mounting groove (11).

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