A regulating component and a piezoelectric injection valve

Abstract

This application relates to the field of injection valve technology, and provides an adjustment component and a piezoelectric injection valve. The adjustment component is disposed inside the valve body of the piezoelectric injection valve and includes an adjusting member and a moving member. A first end face of the adjusting member abuts against a second end face of the moving member. The end of the moving member away from the adjusting member is fixedly connected to the flow channel assembly of the piezoelectric injection valve. Thus, when the adjusting member reciprocates relative to the valve body in a first direction, it drives the moving member and the flow channel assembly to reciprocate together in a second direction. This application allows for calibration of the distance between the nozzle and the ejector pin while maintaining a basically horizontal state of the flow channel assembly. Furthermore, the relative positions of the nozzle and the ejector pin remain basically fixed during the process, which improves the stability of continuous adhesive application to the valve body, reduces the difficulty of nozzle assembly, and improves nozzle maintenance efficiency.

Description

Technical Field

[0001] This application relates to the field of injection valve technology, and more particularly to a regulating component and a piezoelectric injection valve. Background Technology

[0002] High-precision fluid distribution technology is frequently used in fields such as biochemical engineering, cell biology, pharmaceutical medicine, microelectromechanical systems (MEMS), nanoelectromechanical systems (MEMS), and printed circuit board (PCB) manufacturing. High-precision fluid distribution technology refers to the distribution of fluids in microliter or nanoliter volumes to designated locations on target materials to meet the requirements of high-precision liquid distribution. Piezoelectric jet valves are commonly used devices in this technology.

[0003] A piezoelectric jet valve is a non-contact precision fluid control device based on the inverse piezoelectric effect. It achieves high-speed, precise jetting of micro-level adhesives by driving the deformation of piezoelectric ceramics with voltage. Its core advantages lie in high frequency, high precision, and avoidance of needle contact contamination, making it a key component in electronics manufacturing and semiconductor packaging. In existing technologies, because piezoelectric jet valves are high-frequency triggered devices, the resulting vibrations and impacts can alter the initial position of the nut, increasing the distance between the nozzle and the ejector pin, thus gradually weakening the dispensing effect. Therefore, the distance between the ejector pin and the nozzle needs to be calibrated. Secondly, the nozzle of the piezoelectric jet valve is prone to adhesive adhesion or clogging, requiring periodic disassembly and cleaning. This involves removing the nut for cleaning, and after cleaning, the nozzle needs to be recalibrated.

[0004] In summary, common nozzle calibration methods for piezoelectric injection valves suffer from drawbacks such as low calibration accuracy or complex structures. Furthermore, recalibrating the nozzle after disassembly and cleaning increases preparation time before operation, reducing efficiency. Therefore, nozzle calibration devices for piezoelectric injection valves require improvement and refinement. Summary of the Invention

[0005] The purpose of this application is to provide an adjustment component and a piezoelectric injection valve to improve the technical problems mentioned in the background section.

[0006] For the purposes mentioned above, this application provides the following technical solution: The first aspect of this application provides an adjustment assembly disposed inside the valve body of a piezoelectric injection valve, comprising an adjustment member and a moving member, wherein a first end face of the adjustment member abuts against a second end face of the moving member, and one end of the moving member away from the adjustment member is fixedly connected to a flow channel assembly of the piezoelectric injection valve; the adjustment member is capable of reciprocating relative to the valve body in a first direction and driving the moving member and the flow channel assembly to reciprocate in a second direction.

[0007] Furthermore, the movable member includes an adjusting part and a connecting part, the second end face is located on the side where the adjusting part abuts against the adjusting member, and the included angle between the second end face and the second direction is preferably not a right angle.

[0008] Preferably, the first end face is a curved surface, and the first end face and the second end face are in point contact.

[0009] Preferably, the top surface of the adjusting part is provided with a blind hole, and an adjusting spring is also provided at the connection position between the inner wall of the valve body and the moving part; one end of the adjusting spring is connected to the blind hole, and the other end abuts against the valve body.

[0010] Preferably, the adjusting member is threadedly connected to the valve body, and the end of the adjusting member away from the moving member extends along the first direction to the outside of the valve body.

[0011] A second aspect of this application provides a piezoelectric injection valve, including a valve body and a flow channel assembly. The valve body is internally provided with the adjustment assembly described in the first aspect of this application. The adjustment assembly includes an adjusting member and a moving member. A first end face of the adjusting member abuts against a second end face of the moving member. The adjusting member is capable of reciprocating relative to the valve body in a first direction and driving the moving member to reciprocate in a second direction. The flow channel assembly is fixedly connected to the end of the moving member away from the adjusting member. While the moving member reciprocates in the second direction, it can drive the flow channel assembly to reciprocate in the second direction.

[0012] Furthermore, the flow channel assembly is detachably connected to the valve body.

[0013] Furthermore, the valve body is also provided with a piezoelectric drive mechanism, and the drive end of the piezoelectric drive mechanism is provided with a push pin; the flow channel assembly includes a liquid box, a push pin limiting assembly and a nozzle assembly, the push pin limiting assembly, the nozzle assembly and the push pin are coaxially arranged along the second direction, one end of the push pin limiting assembly is fixed to the upper top surface of the liquid box, and the other end is connected to the inside of the valve body, the push pin passes through the inside of the push pin limiting assembly; the nozzle assembly is fixed to the lower top surface of the liquid box, and the liquid box is fixedly connected to the moving part through a connector.

[0014] Furthermore, the ejector pin limiting assembly includes a firing pin spring, a firing pin spring, and a guide sleeve coaxially connected. The guide sleeve is fixed to the upper top surface of the liquid box. One end of the firing pin spring is movably connected to the guide sleeve. The firing pin spring is sleeved on the firing pin spring and located between the firing pin spring and the guide sleeve. The end of the firing pin spring away from the guide sleeve is assembled and connected to the valve body. The ejector pin achieves limiting by passing through the interior of the firing pin spring and the guide sleeve.

[0015] Furthermore, the nozzle assembly includes a nozzle, a guide ring, and a nut that are coaxially connected. One end of the guide ring is fixedly connected to the nut, and the other end is fixedly connected to the nozzle. The nut is threadedly connected to the bottom surface of the liquid box and fixes the nozzle to the bottom of the liquid box.

[0016] The adjustment component provided in this application, as described above, can achieve at least the following technical effects: The adjustment component provided in this application, by setting an adjusting member and a moving member that are connected in a mating manner, and fixing the flow channel assembly with the nozzle fixed to it to the moving member, allows the adjusting member to move back and forth relative to the valve body in a first direction while simultaneously driving the moving member and the flow channel assembly to move back and forth in a second direction. This ensures that while calibrating the distance between the nozzle and the ejector pin, the flow channel assembly remains basically horizontal, and the relative positions of the nozzle and the ejector pin are also basically fixed during the process. This is beneficial to the stability of continuous glue application to the valve body, reduces the assembly difficulty of the nozzle, and improves the maintenance efficiency of the nozzle. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 An isometric view of a piezoelectric injection valve provided in the embodiments of this application; Figure 2 An exploded front view of a piezoelectric injection valve provided in the embodiments of this application; Figure 3 This is a cross-sectional schematic diagram of a piezoelectric injection valve provided in the embodiments of this application; Figure 4 This is a schematic diagram of the adjusting component structure provided in the embodiments of this application; Figure 5 This is a schematic diagram of the first structure of the movable component provided in the embodiments of this application; Figure 6 This is a schematic diagram of the second structure of the movable component provided in the embodiments of this application; Figure 7 This is a schematic diagram of the flow channel component structure provided in the embodiments of this application.

[0019] Reference numerals: 100, piezoelectric injection valve; 1, glue tank; 2, valve body; 3, flow channel assembly; 31, liquid box; 32, ejector pin limiting assembly; 320, impact pin spring; 321, impact pin spring; 322, guide sleeve; 33, nozzle assembly; 330, nozzle; 331, guide ring; 332, nut; 4, adjusting assembly; 41, adjusting component; 410, first end face; 411, threaded connection; 412, knob; 42, moving component; 420, second end face; 421, adjusting part; 422, connecting part; 423, blind hole; 424, adjusting spring; 425, connecting hole; 426, connecting component. Detailed Implementation

[0020] The technical solutions of this application will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] This embodiment provides an adjustment component and a piezoelectric injection valve. By providing a mating adjustment member and a moving member, and fixing the flow channel assembly with the nozzle to the moving member, the adjustment member is positioned relative to the valve body along a first direction (…). Figure 1 While reciprocating in the X direction, it drives the moving parts and flow channel assembly along the second direction ( Figure 1 The nozzle moves back and forth in the Y direction, thereby calibrating the distance between the nozzle and the ejector pin while keeping the flow channel assembly horizontal.

[0022] like Figure 1 and Figure 2 As shown, the piezoelectric jet valve 100 provided in this embodiment includes a glue tank 1, a valve body 2, and a flow channel assembly 3. The valve body 2 is internally provided with a piezoelectric drive mechanism and an adjustment assembly 4. The drive direction of the piezoelectric drive mechanism is fixedly connected to a ejector pin. Under the drive of the piezoelectric drive mechanism, the ejector pin reciprocates along a second direction to strike the nozzle 330 fixed on the flow channel assembly 3, thereby realizing the glue dispensing function.

[0023] Furthermore, according to Figure 3 , Figure 4 and Figure 5 As shown, the adjusting assembly 4 includes an adjusting member 41 and a moving member 42. The adjusting member 41 is rotatably connected to the valve body 2 along a first direction, and the first end face 410 of the adjusting member 41 abuts against the second end face 420 of the moving member 42, so that when the adjusting member 41 reciprocates relative to the valve body 2 along the first direction, it can drive the moving member 42 to reciprocate along the second direction. The moving member 42 is disposed inside the valve body 2 along the second direction, and its end away from the adjusting member 41 is detachably and fixedly connected to the flow channel assembly 3.

[0024] Preferably, such as Figure 4 As shown, the adjusting member 41 is a threaded connector with a knob, including a threaded connection portion 411 and a knob portion 412. The first end face 410 is curved, and there is point contact between the first end face 410 and the second end face 420. The threaded connection portion 411 is threadedly connected to the valve body 2, and the knob portion 412 is fixedly connected to the threaded connection portion 411 and extends to the outside of the valve body 2. By rotating the knob located outside the valve body 2, the adjusting member 41 reciprocates relative to the valve body 2 in a first direction. During this reciprocating movement relative to the valve body 2, the adjusting member 41, through point contact, drives the moving member 42 to reciprocate in a second direction. As the adjusting member 41 is screwed in or unscrewed, the entire flow channel assembly 3 moves precisely up and down in the second direction along with the moving member 42. This movement is used to precisely calibrate the dynamic gap between the nozzle 330 and the ejector pin during operation.

[0025] Preferably, the first end face 410 is spherical.

[0026] Furthermore, such as Figure 5 , Figure 6 As shown, the movable part 42 includes an adjusting part 421 and a connecting part 422. Its second end face 420 is located on the side of the adjusting part 421 that abuts against the adjusting part 41. The connection between the adjusting part 421 and the connecting part 422 has an I-shaped groove structure for engaging with the valve body 2. The top surface of the adjusting part 421 is provided with a blind hole 423 for connecting an adjusting spring 424. One end of the adjusting spring 424 is connected to the blind hole 423, and the other end abuts against the inside of the valve body 2. By providing the adjusting spring 424, the elastic force of the striker spring 321 in the flow channel assembly 3 can be balanced in real time, thereby keeping the flow channel assembly 3 basically horizontal during nozzle 330 calibration and improving the smoothness of the calibration mechanism's movement. The bottom of the connecting part 422 is provided with a connecting hole 425, which is used to install a connecting part 426 to achieve a fixed connection with the flow channel assembly 3.

[0027] Preferably, the angle between the second end face 420 and the second direction is not a right angle. By setting the inclined second end face 420 to make point contact with the first end face 410, the adjusting member 41 and the moving member 42 can move together. In this embodiment, the inclination angle of the second end face 420 can be changed. Different inclination angles correspond to different adjustable amounts, and as the inclination angle of the second end face 420 increases, the accuracy of the nozzle 330 calibration also increases.

[0028] Furthermore, such as Figure 1 and Figure 7As shown, the flow channel assembly 3 includes a liquid tank 31, a pin limiting assembly 32, and a nozzle assembly 33. The pin limiting assembly 32 and the nozzle assembly 33 are coaxially arranged with the pin inside the valve body 2 along a second direction. One end of the pin limiting assembly 32 is fixed to the upper top surface of the liquid tank 31, and the other end is connected to the inside of the valve body 2 through an assembly hole at the bottom of the valve body 2. The nozzle assembly 33 is fixed to the lower top surface of the liquid tank 31. The liquid tank 31 is fixedly connected to the moving part 42 via a connector 426. To facilitate quick maintenance and ensure accuracy, the flow channel assembly 3 is designed as an independent, replaceable module through a detachable connection to the valve body 2. When the flow channel assembly 3 needs to be disassembled for cleaning, the connector 426 between the flow channel assembly 3 and the moving part 42 can be directly loosened, while the moving part 42 remains in its position. After the flow channel assembly 3 is cleaned and reassembled, nozzle 330 calibration is not required, and glue application can proceed.

[0029] Furthermore, the ejector pin limiting assembly 32 includes a firing pin spring 320, a firing pin spring 321, and a guide sleeve 322 coaxially connected. The guide sleeve 322 is fixed to the upper top surface of the liquid box 31. One end of the firing pin spring 320 is movably connected to the guide sleeve 322. The firing pin spring 321 is sleeved on the firing pin spring 320 and located between the firing pin spring 320 and the guide sleeve 322. The end of the firing pin spring 320 away from the guide sleeve 322 is assembled and connected to the valve body 2. The ejector pin is limited by passing through the interiors of the firing pin spring 320 and the guide sleeve 322 respectively.

[0030] Furthermore, the nozzle assembly 33 includes a nozzle 330, a guide ring 331, and a nut 332 that are coaxially connected. One end of the guide ring 331 is fixedly connected to the nut 332, and the other end is fixedly connected to the nozzle 330. The nut 332 is threadedly connected to the bottom surface of the liquid box 31 and fixes the nozzle 330 to the bottom of the liquid box 31.

[0031] The working principle of the piezoelectric injection valve 100 provided in this embodiment is as follows: During assembly, the nut 332 is directly tightened to the bottom of the liquid box 31, preventing it from loosening due to the vibration of the piezoelectric valve. This ensures that the distance between the nozzle 330 and the impact pin remains relatively consistent, which is beneficial for the stability of continuous glue application on the valve body 2. Furthermore, it reduces the assembly difficulty of the nozzle 330 and improves its maintenance efficiency. After assembly, the flow channel assembly 3 is first connected to the moving part 42 using screws or other connectors 426. This allows the flow channel assembly 3 to move along with the moving part 42 when it moves in the second direction. Next, the adjusting part 41 is installed into the corresponding threaded hole in the valve body 2. When the adjusting part 41 is screwed into the valve body 2, its first end face 410 contacts and presses against the second end face 420. The moving part 42 then moves in the second direction, causing the flow channel assembly 3 to reciprocate in the second direction, thereby adjusting the distance between the nozzle 330 and the impact pin. The adjusting spring 424 connected to the top of the moving part 42 is used to balance the elastic force of the impact pin spring 321, so that the flow channel assembly 3 can be kept in a basically horizontal state when the nozzle 330 is calibrated, thereby improving the smoothness of the movement of the calibration mechanism.

[0032] During operation, the colloid enters the liquid storage chamber inside the liquid box 31 of the flow channel assembly 3 from the glue tank 1. Driven by the electronic control system, the piezoelectric drive mechanism generates high-frequency motion in the second direction, driving the ejector pin to reciprocate and rise. At this time, the fluid instantly fills the space between the pulled-out nozzle 330 and the tip of the ejector pin; then the ejector pin rebounds and impacts the nozzle 330 at high speed, precisely ejecting a small amount of fluid as glue dots from the nozzle 330 opening, completing one dispensing cycle.

[0033] The present invention achieves the following technical effects through the above embodiments: 1. The adjustment component provided in this application uses the mating spherical surface at the end of the knob and the inclined wedge-shaped surface on the adjustment block to transmit displacement. This structure achieves high-resolution gap fine adjustment function with minimal space occupation. Compared with the existing nozzle calibration mechanism, it is smaller in size and easier to integrate into the valve body. 2. This application provides an independent, replaceable flow channel assembly. When the flow channel assembly needs to be disassembled for cleaning, the connection between the flow channel assembly and the moving part can be directly loosened, while the moving part remains in its position. During this process, the moving part remains fixed to the valve body, and its height and orientation remain unchanged. After the flow channel assembly is cleaned and reassembled, simply tighten the connecting screws, and the flow channel assembly will precisely return to its original position before disassembly. The calibrated gap between the nozzle and the impact pin remains unchanged, thereby significantly reducing the technical threshold and downtime required for equipment maintenance. 3. In this application, the nozzle is directly pressed and fixed to the front end of the liquid box by the nut, which has excellent anti-vibration and anti-loosening performance, thereby preventing the nut from loosening due to the vibration of the piezoelectric valve, ensuring that the distance between the nozzle and the impact pin is basically consistent, and improving the stability of glue application; 4. The balance spring provided in this application can prevent the liquid box from tilting and getting stuck, making the nozzle calibration process smoother.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such 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 application.

Claims

1. An adjustment component, characterized in that, The adjustment component (4) is disposed inside the valve body (2) of the piezoelectric injection valve (100), and includes an adjustment member (41) and a moving member (42). The first end face (410) of the adjustment member (41) abuts against the second end face (420) of the moving member (42), and the end of the moving member (42) away from the adjustment member (41) is fixedly connected to the flow channel assembly (3) of the piezoelectric injection valve (100). The adjusting member (41) can reciprocate relative to the valve body (2) in a first direction and drive the moving member (42) and the flow channel assembly (3) to reciprocate in a second direction.

2. The adjustment component according to claim 1, characterized in that, The movable member (42) includes an adjusting part (421) and a connecting part (422). The second end face (420) is located on the side where the adjusting part (421) abuts against the adjusting member (41). The angle between the second end face (420) and the second direction is not a right angle.

3. An adjustment component according to claim 2, characterized in that, The first end face (410) is a curved surface, and the first end face (410) and the second end face (420) are in point contact.

4. An adjustment component according to claim 2, characterized in that, The top surface of the adjustment part (421) is provided with a blind hole (423), and an adjustment spring (424) is provided at the connection position between the inner wall of the valve body (2) and the moving part (42). One end of the adjustment spring (424) is connected to the blind hole (423), and the other end abuts against the valve body (2).

5. An adjustment component according to claim 1, characterized in that, The adjusting member (41) is threadedly connected to the valve body (2), and one end of the adjusting member (41) away from the moving member (42) extends along the first direction to the outside of the valve body (2).

6. A piezoelectric injection valve, characterized in that, The device includes a valve body (2) and a flow channel assembly (3). The valve body (2) is provided with an adjustment assembly (4) as described in any one of claims 1 to 5. The adjustment assembly (4) includes an adjustment member (41) and a moving member (42). The first end face (410) of the adjustment member (41) abuts against the second end face (420) of the moving member (42). The adjustment member (41) is capable of reciprocating relative to the valve body (2) in a first direction and driving the moving member (42) to reciprocate in a second direction. The flow channel assembly (3) is fixedly connected to the end of the moving member (42) away from the adjusting member (41). While the moving member (42) moves back and forth in the second direction, it can drive the flow channel assembly (3) to move back and forth in the second direction.

7. A piezoelectric injection valve according to claim 6, characterized in that, The flow channel assembly (3) is detachably connected to the valve body (2).

8. A piezoelectric injection valve according to claim 7, characterized in that, The valve body (2) is also provided with a piezoelectric drive mechanism, and the drive end of the piezoelectric drive mechanism is provided with a pin; The flow channel assembly (3) includes a liquid box (31), a pin limiting assembly (32), and a nozzle assembly (33). The pin limiting assembly (32), the nozzle assembly (33), and the pin are coaxially arranged along the second direction. One end of the pin limiting assembly (32) is fixed to the upper top surface of the liquid box (31), and the other end is connected to the inside of the valve body (2). The pin passes through the inside of the pin limiting assembly (32). The nozzle assembly (33) is fixed to the lower top surface of the liquid box (31). The liquid box (31) is connected to the moving part (42) through a connector (426).

9. A piezoelectric injection valve according to claim 8, characterized in that, The ejector pin limiting assembly (32) includes a firing pin spring (320), a firing pin spring (321), and a guide sleeve (322) connected coaxially. The guide sleeve (322) is fixed to the upper top surface of the liquid box (31). One end of the firing pin spring (320) is movably connected to the guide sleeve (322). The firing pin spring (321) is sleeved on the firing pin spring (320) and located between the firing pin spring (320) and the guide sleeve (322). The end of the firing pin spring (320) away from the guide sleeve (322) is assembled and connected to the valve body (2). The ejector pin is limited by passing through the interior of the firing pin spring (320) and the guide sleeve (322).

10. A piezoelectric injection valve according to claim 8, characterized in that, The nozzle assembly (33) includes a nozzle (330), a guide ring (331), and a nut (332) connected coaxially. One end of the guide ring (331) is fixedly connected to the nut (332), and the other end is fixedly connected to the nozzle. The nut (332) is threadedly connected to the bottom surface of the liquid box (31) and fixes the nozzle (330) to the bottom of the liquid box (31).

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