Quick-release piezoelectric ceramic injection valve

Abstract

A supporting column is arranged in a containing groove of a valve body and located below the left end of a first lever, and a first spring is arranged between the supporting column and the lower surface of the left end of the first lever. The lower end of a rotary adjusting screw rod installed on the valve body makes contact with the upper surface of the left end of the first lever, a horizontal cutting groove and a vertical cutting groove located above the horizontal cutting groove are formed in the valve body and located on the outer side of the upper portion of the rotary adjusting screw rod respectively, and therefore a first clamping part and a second clamping part which surround the rotary adjusting screw rod respectively are formed. The first clamping part and the second clamping part are connected through a fastening bolt. According to the utility model, the distance between the firing pin and the nozzle can be adjusted through the rotary adjusting screw rod, and the rotary adjusting screw rod can be locked after the adjustment is completed, so that the situation of inconsistent glue discharge caused by the movement of the rotary adjusting screw rod in the glue discharge process is avoided.

Description

Technical Field

[0001] This utility model relates to the field of dispensing technology, and in particular to a quick-release piezoelectric ceramic jet valve. Background Technology

[0002] Currently, jet dispensing is achieved through a piezoelectric-driven fluid jet valve. The piezoelectric-driven fluid jet valve is an important component of the fluid jetting device. Its main structure consists of a valve body, a piezoelectric actuator, an amplifier, and a flow channel assembly. The amplifier amplifies the deformation of the piezoelectric ceramic in the piezoelectric actuator after energization through the lever principle and transmits it to the jet push rod in the flow channel assembly, thereby using the jet push rod to spray the adhesive out of the flow channel assembly.

[0003] The nozzle of a piezoelectric jet valve may deviate after installation, causing a discrepancy between the initial and set gaps between the nozzle and the ejector pin. To achieve high-precision dispensing, the relative positions of the nozzle and ejector pin must be strictly controlled during assembly. In existing technologies, even after adjusting the positions of the nozzle and ejector pin, misalignment can still easily occur during dispensing, affecting product consistency. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a quick-release piezoelectric ceramic injection valve. This quick-release piezoelectric ceramic injection valve can not only adjust the distance between the impact pin and the nozzle, but also avoid inconsistent dispensing caused by the movement of the adjusting screw during the dispensing process after adjustment.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a quick-release piezoelectric ceramic injection valve, comprising: a valve body with an internal receiving groove, an inlet body mounted on the lower end face of the valve body, a nozzle mounted on the inlet body, a striking pin configured to cooperate with the nozzle, and a first lever, a piezoelectric column, and a second lever arranged sequentially from top to bottom within the receiving groove. The inlet body has an inlet channel and an outlet channel respectively. The lower end of the outlet channel, whose upper end communicates with the inlet channel, communicates with the nozzle. The right end of the first lever is connected to the inner wall of the receiving groove above it via a mutually cooperating first protrusion. The second lever is rotatably connected to the first groove. The right end of the second lever is rotatably connected to the inner wall of the receiving groove below it through a second protrusion and the second groove. The upper end of the piezoelectric column is rotatably contacted to the first lever through a third protrusion and the third groove. The lower end of the piezoelectric column is rotatably contacted to the second lever through a fourth protrusion and the fourth groove. The third protrusion and the third groove are located near the right end of the first lever and to the left of the first protrusion and the first groove. The fourth protrusion and the fourth groove are located near the right end of the second lever and to the left of the second protrusion and the second groove.

[0006] A second spring is provided between the lower surface of the second lever and the inner wall of the bottom of the receiving groove. The lower surface of the left end of the second lever contacts the upper end face of the firing pin. The lower end of the firing pin, located in the receiving groove, passes through the glue outlet channel of the glue inlet body and cooperates with the nozzle. A guide sleeve for the firing pin to pass through is provided at the lower opening of the valve body. A return spring is provided between the lower end face of the radially outward flange of the upper end of the firing pin and the guide sleeve. A support column is provided in the receiving groove of the valve body and below the left end of the first lever. A first spring is provided between the support column and the lower surface of the left end of the first lever. The lower end of a rotary screw mounted on the valve body contacts the upper surface of the left end of the first lever. A horizontal groove and a vertical groove above the horizontal groove are respectively provided on the valve body and on the outer side of the upper part of the rotary screw, thereby forming a first clamping part and a second clamping part around the rotary screw. The first clamping part and the second clamping part are connected by a fastening bolt.

[0007] The following are further improvements to the above technical solution:

[0008] 1. In the above scheme, the second spring, which is in contact with the lower surface of the left end of the second lever, is fitted on the outside of the return spring and the guide sleeve and is coaxially arranged with the return spring.

[0009] 2. In the above scheme, the surface on the rotary screw that contacts the upper surface of the left end of the first lever is a spherical surface.

[0010] 3. In the above scheme, the surfaces that cooperate with each other between the first protrusion and the first groove, the second protrusion and the second groove, the third protrusion and the third groove, and the fourth protrusion and the fourth groove are all arc surfaces.

[0011] 4. In the above scheme, the first protrusion is formed on the upper surface of the right end of the first lever, and the first groove into which the first protrusion is embedded is formed on the inner wall of the receiving groove.

[0012] 5. In the above solution, the lower surface of the glue injection body has a mounting protrusion, and the nozzle is mounted on the lower end face of the mounting protrusion via a mounting base.

[0013] 6. In the above scheme, the mounting base with internal threads and the mounting protrusion with external threads are connected by threads.

[0014] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0015] This utility model relates to a quick-release piezoelectric ceramic injection valve. A support column is located in the receiving groove of the valve body, below the left end of a first lever. A first spring is positioned between the support column and the lower surface of the left end of the first lever. The lower end of a rotary screw mounted on the valve body contacts the upper surface of the left end of the first lever. A horizontal groove and a vertical groove above the horizontal groove are respectively provided on the outer side of the upper part of the rotary screw on the valve body, forming a first clamping part and a second clamping part around the rotary screw. The first clamping part and the second clamping part are connected by a fastening bolt. This allows for adjustment of the distance between the impact pin and the nozzle via the rotary screw, and also allows locking the rotary screw after adjustment to prevent inconsistent dispensing due to movement of the rotary screw during dispensing. Furthermore, its second… A second spring is provided between the lower surface of the lever and the inner wall of the bottom of the receiving groove. The lower surface of the left end of the second lever contacts the upper end face of the firing pin. The lower end of the firing pin, located in the receiving groove, passes into the dispensing channel of the glue body and cooperates with the nozzle. A guide sleeve for the firing pin to pass through is provided at the lower opening of the valve body. A return spring is provided between the lower end face of the radially outward flange of the upper end of the firing pin and the guide sleeve. The second spring, which is in contact with the lower surface of the left end of the second lever, is fitted on the outside of the return spring and the guide sleeve and is coaxially arranged with the return spring. This can improve the stability of the second lever and the firing pin that moves with the second lever during repeated high-frequency movement, as well as the consistency of the dispensing gap formed between the firing pin and the nozzle and the impact force between them, thereby improving the dispensing accuracy and stability during long-term use. Attached Figure Description

[0016] Appendix Figure 1 This is a schematic diagram of the quick-release piezoelectric ceramic injection valve of this utility model;

[0017] Appendix Figure 2 for Figure 1 Enlarged view of a local structure in the image;

[0018] Appendix Figure 3 A partial structural cross-section of the quick-release piezoelectric ceramic injection valve of this utility model. Figure 1 ;

[0019] Appendix Figure 4 A partial structural cross-section of the quick-release piezoelectric ceramic injection valve of this utility model. Figure 2 .

[0020] In the above attached figures: 1. Inlet body; 2. Nozzle; 3. Impact pin; 31. Flange; 41. Inlet channel; 42. Outlet channel; 51. Mounting protrusion; 52. Mounting base; 14. Guide sleeve; 15. Return spring; 21. Receiving groove; 22. Valve body; 221. Horizontal groove; 222. Vertical groove; 23. First lever; 231. First protrusion; 232. First groove; 24. Piezoelectric column; 241. Third protrusion; 242. Third groove; 243. Fourth protrusion; 244. Fourth groove; 25. Second lever; 251. Second protrusion; 252. Second groove; 26. Support column; 271. First spring; 272. Second spring; 28. Adjusting screw; 291. First clamping part; 292. Second clamping part; 30. Fastening bolt. Detailed Implementation

[0021] The present patent can be further understood through the specific embodiments given below, but they are not intended to limit the present patent.

[0022] Example 1: A quick-release piezoelectric ceramic injection valve includes: a valve body 22 with an internal receiving groove 21, an inlet body 1 mounted on the lower end face of the valve body 22, a nozzle 2 mounted on the inlet body 1, a striking pin 3 cooperating with the nozzle 2, and a first lever 23, a piezoelectric column 24, and a second lever 25 arranged sequentially from top to bottom within the receiving groove 21. The inlet body 1 has an inlet channel 41 and an outlet channel 42. The outlet channel 42, whose upper end communicates with the inlet channel 41, communicates with the nozzle 2 at its lower end. The right end of the first lever 23 is rotatably connected to the inner wall of the receiving groove 21 above it via a first protrusion 231 and a first groove 232 that cooperate with each other. The second lever 25... The right end is rotatably connected to the inner wall of the receiving groove 21 located below it through a second protrusion 251 and a second groove 252 that cooperate with each other. The upper end of the piezoelectric column 24 is rotatably contacted to the first lever 23 through a third protrusion 241 and a third groove 242 that cooperate with each other. The lower end of the piezoelectric column 24 is rotatably contacted to the second lever 25 through a fourth protrusion 243 and a fourth groove 244 that cooperate with each other. The third protrusion 241 and the third groove 242 are located near the right end of the first lever 23 and are located to the left of the first protrusion 231 and the first groove 232. The fourth protrusion 243 and the fourth groove 244 are located near the right end of the second lever 25 and are located to the left of the second protrusion 251 and the second groove 252.

[0023] A second spring 272 is provided between the lower surface of the second lever 25 and the inner wall of the bottom of the receiving groove 21. The lower surface of the left end of the second lever 25 contacts the upper end face of the impact pin 3. The lower end of the impact pin 3, located in the receiving groove 21, passes through the glue outlet channel 42 of the glue inlet body 1 and cooperates with the nozzle 2. A guide sleeve 14 is provided at the lower end opening of the valve body 22 for the impact pin 3 to pass through. A return spring 15 is provided between the lower end face of the radially outward flange 31 of the upper end of the impact pin 3 and the guide sleeve 14. The valve body 22 is located in the receiving groove 21 and at the left end of the first lever 23. A support column 26 is provided below the valve body 22. A first spring 271 is provided between the support column 26 and the lower surface of the left end of the first lever 23. The lower end of a rotary screw 28 mounted on the valve body 22 contacts the upper surface of the left end of the first lever 23. A horizontal groove 221 and a vertical groove 222 located above the horizontal groove 221 are respectively provided on the valve body 22 and on the outer side of the upper part of the rotary screw 28, thereby forming a first clamping part 291 and a second clamping part 292 around the rotary screw 28. The first clamping part 291 and the second clamping part 292 are connected by a fastening bolt 30.

[0024] The second spring 272, which is in contact with the lower surface of the left end of the second lever 25, is fitted on the outside of the return spring 15 and the guide sleeve 14 and is coaxially arranged with the return spring 15. The return spring 15 of the striker promotes the striker to quickly return to the raised state, so that a gap is formed between the striker and the nozzle, which facilitates the rapid entry of fluid. The return spring of the second lever (i.e., the second spring 272) promotes the lever to quickly rebound after the piezoelectric ceramic shortens, which protects the piezoelectric ceramic and facilitates the rapid lifting of the striker. The surface of the rotary screw 28 that contacts the upper surface of the left end of the first lever 23 is a spherical surface.

[0025] The lower surface of the aforementioned glue-feeding body 1 has a mounting protrusion 51, and the aforementioned nozzle 2 is mounted on the lower end face of the aforementioned mounting protrusion 51 via a mounting seat 52; the aforementioned mounting seat 52 with internal threads and the mounting protrusion 51 with external threads are connected by threads.

[0026] Example 2: A quick-release piezoelectric ceramic injection valve includes: a valve body 22 with an internal receiving groove 21, an inlet body 1 mounted on the lower end face of the valve body 22, a nozzle 2 mounted on the inlet body 1, a striking pin 3 cooperating with the nozzle 2, and a first lever 23, a piezoelectric column 24, and a second lever 25 arranged sequentially from top to bottom within the receiving groove 21. The inlet body 1 has an inlet channel 41 and an outlet channel 42. The outlet channel 42, whose upper end communicates with the inlet channel 41, communicates with the nozzle 2 at its lower end. The right end of the first lever 23 is rotatably connected to the inner wall of the receiving groove 21 above it via a first protrusion 231 and a first groove 232. The second lever 25... The right end is rotatably connected to the inner wall of the receiving groove 21 located below it through a second protrusion 251 and a second groove 252 that cooperate with each other. The upper end of the piezoelectric column 24 is rotatably contacted to the first lever 23 through a third protrusion 241 and a third groove 242 that cooperate with each other. The lower end of the piezoelectric column 24 is rotatably contacted to the second lever 25 through a fourth protrusion 243 and a fourth groove 244 that cooperate with each other. The third protrusion 241 and the third groove 242 are located near the right end of the first lever 23 and are located to the left of the first protrusion 231 and the first groove 232. The fourth protrusion 243 and the fourth groove 244 are located near the right end of the second lever 25 and are located to the left of the second protrusion 251 and the second groove 252.

[0027] A second spring 272 is provided between the lower surface of the second lever 25 and the inner wall of the bottom of the receiving groove 21. The lower surface of the left end of the second lever 25 contacts the upper end face of the impact pin 3. The lower end of the impact pin 3, located in the receiving groove 21, passes through the glue outlet channel 42 of the glue inlet body 1 and cooperates with the nozzle 2. A guide sleeve 14 is provided at the lower end opening of the valve body 22 for the impact pin 3 to pass through. A return spring 15 is provided between the lower end face of the radially outward flange 31 of the upper end of the impact pin 3 and the guide sleeve 14. The valve body 22 is located in the receiving groove 21 and at the left end of the first lever 23. A support column 26 is provided below the valve body 22. A first spring 271 is provided between the support column 26 and the lower surface of the left end of the first lever 23. The lower end of a rotary screw 28 mounted on the valve body 22 contacts the upper surface of the left end of the first lever 23. A horizontal groove 221 and a vertical groove 222 located above the horizontal groove 221 are respectively provided on the valve body 22 and on the outer side of the upper part of the rotary screw 28, thereby forming a first clamping part 291 and a second clamping part 292 around the rotary screw 28. The first clamping part 291 and the second clamping part 292 are connected by a fastening bolt 30.

[0028] The surfaces that mate with each other between the first protrusion 231 and the first groove 232, the second protrusion 251 and the second groove 252, the third protrusion 241 and the third groove 242, and the fourth protrusion 243 and the fourth groove 244 are all arc surfaces.

[0029] The first protrusion 231 is formed on the upper surface of the right end of the first lever 23, and the first groove 232 into which the first protrusion 231 is inserted is opened on the inner wall of the receiving groove 21; the second groove 252 is opened on the lower surface of the right end of the second lever 25, and the second protrusion 251 is disposed on the inner wall of the receiving groove 21.

[0030] The third protrusion 241 is disposed on the upper end of the piezoelectric column 24, and the third groove 242 is formed on the lower surface of the first lever 23; the fourth protrusion 243 is integrally formed on the upper surface of the second lever 25, and the fourth groove 244 is formed on the lower end surface of the piezoelectric column 24.

[0031] Working principle:

[0032] The glue enters the glue inlet channel on the glue inlet body and then enters the glue outlet channel. The lower end of the ejector pin, which cooperates with the nozzle, penetrates into the glue outlet channel. Through repeated impacts between the ejector pin and the nozzle, the glue in the glue outlet channel is sprayed out from the lower end of the nozzle to perform the dispensing operation. Specifically: after the piezoelectric column is energized, it expands downward to create a thrust on the right end of the second lever, which causes the left end of the second lever, which rotates around the second protrusion, to push the ejector pin downward to strike the nozzle and dispense glue. After the piezoelectric column is de-energized, it retracts, and the nested reset spring and the second spring reset respectively, so that the ejector pin and the second lever return to their initial positions. The excitation voltage of the piezoelectric column is a square wave. Therefore, the ejector pin performs high-speed reciprocating motion under the action of the piezoelectric column, so that the glue can be continuously sprayed out from the nozzle.

[0033] During initial debugging, loosening the fastening bolts allows adjustment of the initial distance between the striker and the nozzle by rotating the screw threaded into the valve body in either the forward or reverse direction. Specifically: when rotating the screw forward, it pushes the left end of the first lever downward. The first lever, rotating around the first protrusion, pushes the piezoelectric column downward, and the downward force is transmitted to the striker through the second lever, causing the striker to move downward and the distance between the striker and the nozzle to decrease. When rotating the screw in the reverse direction, it moves upward, and the left end of the first lever moves upward with the screw under the action of the first spring. Finally, the second lever moves upward under the action of the second spring, and the striker moves upward with the second lever under the action of the return spring, increasing the distance between the striker and the nozzle. After the initial distance between the striker and the nozzle is adjusted, tightening the fastening bolts locks the first and second clamping parts, preventing the screw from rotating and avoiding inconsistent dispensing due to the movement of the screw during dispensing.

[0034] When using the aforementioned quick-release piezoelectric ceramic injection valve, the distance between the impact pin and the nozzle can be adjusted by rotating the screw. After adjustment, the screw can be locked to prevent inconsistent dispensing caused by the movement of the screw during dispensing. Furthermore, it can improve the stability of the second lever and the impact pin that moves with the second lever during repeated high-frequency movement, as well as the consistency of the dispensing gap formed between the impact pin and the nozzle and the impact force between them, thereby improving the dispensing accuracy and stability during long-term use.

[0035] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A quick-release piezoelectric ceramic injection valve, comprising: The valve body (22) has an internal receiving groove (21), an inlet body (1) mounted on the lower end face of the valve body (22), a nozzle (2) mounted on the inlet body (1), a striker (3) that cooperates with the nozzle (2), and a first lever (23), a piezoelectric column (24), and a second lever (25) arranged sequentially from top to bottom in the receiving groove (21). The inlet body (1) has an inlet channel (41) and an outlet channel (42) respectively. The outlet channel (42), whose upper end is connected to the inlet channel (41), is connected to the nozzle (2) at its lower end. The first lever (23) is rotatably connected to the inner wall of the receiving groove (21) above it through a first protrusion (231) and a first groove (232) that cooperate with each other. The second lever (25) is connected to the inner wall of the receiving groove (21) above it through a first protrusion (231) and a first groove (232) that cooperate with each other. The inner walls of the lower receiving groove (21) are rotatably connected by a second protrusion (251) and a second groove (252) that cooperate with each other. The upper end of the piezoelectric column (24) is rotatably contacted with the first lever (23) by a third protrusion (241) and a third groove (242) that cooperate with each other. The lower end of the piezoelectric column (24) is rotatably contacted with the second lever (25) by a fourth protrusion (243) and a fourth groove (244) that cooperate with each other. The third protrusion (241) and the third groove (242) are located near the right end of the first lever (23) and are located to the left of the first protrusion (231) and the first groove (232). The fourth protrusion (243) and the fourth groove (244) are located near the right end of the second lever (25) and are located to the left of the second protrusion (251) and the second groove (252). A second spring (272) is provided between the lower surface of the second lever (25) and the inner wall of the bottom of the receiving groove (21). The lower surface of the left end of the second lever (25) contacts the upper end face of the striker (3). The lower end of the striker (3) located in the receiving groove (21) penetrates into the glue outlet channel (42) of the glue inlet body (1) and cooperates with the nozzle (2). A guide sleeve (14) for the striker (3) to pass through is provided at the lower opening of the valve body (22). A return spring (15) is provided between the lower end face of the radially outward flange (31) of the upper end of the striker (3) and the guide sleeve (14). The valve body (22) is located in the receiving groove (21) and is located in the first lever (23). A support column (26) is provided at the lower left end. A first spring (271) is provided between the support column (26) and the lower surface of the left end of the first lever (23). The lower end of a rotary screw (28) mounted on the valve body (22) contacts the upper surface of the left end of the first lever (23). A horizontal groove (221) and a vertical groove (222) located above the horizontal groove (221) are respectively provided on the valve body (22) and the outer side of the upper part of the rotary screw (28), thereby forming a first clamping part (291) and a second clamping part (292) around the rotary screw (28). The first clamping part (291) and the second clamping part (292) are connected by a fastening bolt (30).

2. The quick-release piezoelectric ceramic injection valve according to claim 1, characterized in that: The second spring (272), which is in contact with the lower surface of the left end of the second lever (25), is fitted on the outside of the return spring (15) and the guide sleeve (14) and is coaxially arranged with the return spring (15).

3. The quick-release piezoelectric ceramic injection valve according to claim 1, characterized in that: The surface of the rotary screw (28) that contacts the upper surface of the left end of the first lever (23) is a spherical surface.

4. The quick-release piezoelectric ceramic injection valve according to claim 1, characterized in that: The surfaces that mate with each other between the first protrusion (231) and the first groove (232), the second protrusion (251) and the second groove (252), the third protrusion (241) and the third groove (242), and the fourth protrusion (243) and the fourth groove (244) are all arc surfaces.

5. The quick-release piezoelectric ceramic injection valve according to claim 1 or 4, characterized in that: The first protrusion (231) is formed on the upper surface of the right end of the first lever (23), and the first groove (232) into which the first protrusion (231) is inserted is opened on the inner wall of the receiving groove (21).

6. The quick-release piezoelectric ceramic injection valve according to claim 1, characterized in that: The lower surface of the glue injection body (1) has a mounting protrusion (51), and the nozzle (2) is mounted on the lower end face of the mounting protrusion (51) through a mounting base (52).

7. The flow channel assembly of the injection valve according to claim 6, characterized in that: The mounting base (52) with internal threads is connected to the mounting protrusion (51) with external threads by threads.

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