Piezoelectric injection valve with easy disassembly

Abstract

This utility model discloses a piezoelectric injection valve that is easy to disassemble, comprising: a valve body with an internal receiving groove, a glue supply block with a glue flow channel, a nozzle, and a striker. The glue supply block, valve body, and nozzle are connected by a connecting seat. The upper end face of the connecting seat has an upwardly extending circular protrusion. A sleeve that mates with the circular protrusion is provided inside the valve body. The upper end face of the circular protrusion, directly above the glue flow channel, has a mounting hole. The lower end of a guide sleeve through which the striker passes is threaded into this mounting hole. At least two circumferentially spaced connecting pins are provided on the outer surface of the circular protrusion. At least one elastic element is provided between the upper end face of the circular protrusion and the sleeve. This utility model can achieve quick disassembly between the flow channel assembly consisting of the glue supply block, nozzle, and connecting seat and the valve body, and can also simultaneously disassemble the striker for easy high-frequency cleaning.

Description

Technical Field

[0001] This utility model relates to the field of dispensing technology, and in particular to a piezoelectric jet valve that is easy to disassemble. Background Technology

[0002] Piezoelectric jet dispensing valves utilize the inverse piezoelectric effect of piezoelectric materials in piezoelectric structures for operation. They are mostly used for high-precision and high-consistency fluid control to achieve non-contact fluid control. The piezoelectric structure controls the ejector pin to achieve non-contact glue jetting. In order to ensure the quality of dispensing, the glue inlet component in the piezoelectric jet dispensing valve is also very important. However, existing piezoelectric jet dispensing valves cannot achieve quick disassembly of the glue inlet component, which makes the cleaning of the glue flow channel more complicated and cumbersome. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a piezoelectric injection valve that is easy to disassemble. This easy-to-disassemble piezoelectric injection valve can realize the quick disassembly of the flow channel assembly consisting of the glue supply block, nozzle and connecting seat and the valve body, and can also disassemble the impact pin at the same time, which is convenient for high-frequency cleaning.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a piezoelectric injection valve that is easy to disassemble, comprising: a valve body with an internal receiving groove, a glue supply block disposed on the lower outer side of the valve body and having an internal glue flow channel, a nozzle, and a striking pin. The glue supply block, the valve body, and the nozzle are connected by a connecting seat. The connecting seat has an inlet glue flow channel and an outlet glue flow channel that are interconnected. The end of the inlet glue flow channel away from the outlet glue flow channel is connected to the glue flow channel on the glue supply block. The vertically extending outlet glue flow channel is away from the inlet glue flow channel. The lower end of the channel is connected to the nozzle. The upper end face of the connecting seat has an upwardly extending circular protrusion. A sleeve that mates with the circular protrusion is provided in the valve body. An installation hole is opened on the upper end face of the circular protrusion and directly above the dispensing channel. The lower end of a guide sleeve that allows the firing pin to pass through is threaded into this installation hole. The upper end face of the guide sleeve is higher than the upper end face of the circular protrusion. The lower end of the firing pin, which is movably installed in the guide sleeve, passes into the dispensing channel of the connecting seat and mates with the nozzle.

[0005] At least two connecting pins are provided on the outer surface of the circular upper protrusion. One end of the connecting pin is connected to the circular upper protrusion of the connecting seat, and the other end extends radially outward. Several strip-shaped through holes corresponding to the connecting pins are opened on the side wall of the lower end of the sleeve. One end of each strip-shaped through hole extending circumferentially is connected to a notch groove opened on the lower end face of the sleeve. The other end of the strip-shaped through hole is lower than the end connected to the notch groove. At least one elastic element is provided between the upper end face of the circular upper protrusion embedded in the sleeve and the sleeve.

[0006] The following are further improvements to the above technical solution:

[0007] 1. In the above scheme, a mounting groove communicating with the receiving groove is opened on the lower end face of the valve body, and the sleeve is embedded in the mounting groove.

[0008] 2. In the above scheme, an annular connecting part is provided above the sleeve. This annular connecting part is connected to the sleeve through at least one rib. The annular connecting part with threads on its inner wall is threaded to the lower end of an mounting rod. The upper end of the mounting rod, whose lower end is screwed into the annular connecting part, extends to the top of the valve body.

[0009] 3. In the above scheme, the two parallel and spaced hanging rods each penetrate the valve body and are located below the annular connection part, and the lower end face of the annular connection part is engaged with the hanging rod.

[0010] 4. In the above solution, an arc-shaped groove that mates with the hanging rod is provided on the lower end surface of the annular connecting part.

[0011] 5. In the above scheme, the upper end of the firing pin has a flange portion that extends radially outward, and a return spring is provided between the lower end face of the flange portion and the guide sleeve.

[0012] 6. In the above scheme, the circular upper convex part is located directly above the glue outlet channel and is coaxially arranged with the glue outlet channel.

[0013] 7. In the above scheme, the four connecting pins are arranged at equal intervals along the circumference.

[0014] 8. In the above scheme, the elastic element is a butterfly-shaped spring.

[0015] 9. In the above scheme, the connecting seat has a sealing ring fitted on the outside of the firing pin, located between the guide sleeve and the dispensing channel.

[0016] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0017] The flow channel connection assembly of the injection valve of this utility model connects the glue block, valve body, and nozzle via a connecting seat. The upper end face of the connecting seat has an upwardly extending circular protrusion. A sleeve that mates with the circular protrusion is disposed within the valve body. A mounting hole is formed on the upper end face of the circular protrusion, directly above the glue outlet flow channel. The lower end of a guide sleeve, through which a firing pin can pass, is threaded into this mounting hole. The upper end face of the guide sleeve is higher than the upper end face of the circular protrusion. The lower end of the firing pin, movably mounted within the guide sleeve, penetrates the glue outlet flow channel of the connecting seat and mates with the nozzle. At least two circumferentially spaced connecting pins are provided on the outer surface of the circular protrusion. The other end of each connecting pin, connected to the circular protrusion of the connecting seat, extends radially outward. Several strip-shaped through holes corresponding to the connecting pins are provided on the lower side wall. One end of each strip-shaped through hole extending circumferentially is connected to a notch groove on the lower end face of the sleeve. The other end of the strip-shaped through hole is lower than the end connected to the notch groove. At least one elastic element is provided between the upper end face of the circular upper protrusion embedded in the sleeve and the sleeve. This allows for quick disassembly and installation of the flow channel assembly consisting of the glue block, nozzle, and connecting seat and the valve body through rotation without causing adverse interference to components such as the striker. It also allows for the simultaneous disassembly of the guide sleeve and the striker installed in the guide sleeve, facilitating high-frequency cleaning and replacement of the disassembled flow channel assembly, striker, and nozzle to ensure the accuracy and quality of dispensing. Furthermore, it ensures the stability of the flow channel assembly when connected to the valve body. Attached Figure Description

[0018] Appendix Figure 1 This is an exploded view of the structure of the easily disassembled piezoelectric injection valve of this utility model;

[0019] Appendix Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0020] Appendix Figure 3 This is a cross-sectional view of the easily disassembled piezoelectric injection valve of this utility model;

[0021] Appendix Figure 4 This utility model Figure 3 A magnified view of a specific area;

[0022] Appendix Figure 5 This utility model Figure 3 A magnified view of another part of the image.

[0023] In the attached diagrams: 1. Glue flow channel; 2. Glue supply block; 31. Nozzle; 32. Impact pin; 321. Flange; 4. Connecting seat; 41. Glue inlet channel; 42. Glue outlet channel; 5. Circular upper protrusion; 51. Mounting hole; 6. Connecting pin; 7. Sleeve; 8. Strip-shaped through hole; 9. Notch; 10. Elastic element; 11. Receiving groove; 12. Valve body; 13. Mounting groove; 14. Guide sleeve; 15. Return spring; 16. Annular connecting part; 17. Rib; 181. Mounting rod; 182. Hanging rod; 19. Sealing ring. Detailed Implementation

[0024] The present patent can be further understood through the specific embodiments given below, but they are not intended to limit the present patent.

[0025] Example 1: A piezoelectric injection valve that is easy to disassemble includes: a valve body 12 with an internal receiving groove 11, a glue supply block 2 disposed on the lower outer side of the valve body 12 and having a glue flow channel 1 inside, a nozzle 31, and a striking pin 32. The glue supply block 2, the valve body 12, and the nozzle 31 are connected by a connecting seat 4. The connecting seat 4 has an inlet glue flow channel 41 and an outlet glue flow channel 42 that are interconnected. The end of the inlet glue flow channel 41 away from the outlet glue flow channel 42 is connected to the glue flow channel 1 on the glue supply block 2. The lower end of the vertically extending outlet glue flow channel 42 away from the inlet glue flow channel 41 is connected to the nozzle 31. The upper end face of the connecting seat 4 has an upwardly extending circular protrusion 5. A sleeve 7 that mates with the circular protrusion 5 is provided inside the valve body 12. An installation hole 51 is provided on the upper end face of the circular protrusion 5 and directly above the glue outlet channel 42. The lower end of a guide sleeve 14 through which the firing pin 32 can pass is threaded into the installation hole 51. The upper end face of the guide sleeve 14 is higher than the upper end face of the circular protrusion 5. The lower end of the firing pin 32, which is movably installed in the guide sleeve 14, passes into the glue outlet channel 42 of the connecting seat 4 and mates with the nozzle 31.

[0026] At least two connecting pins 6 are provided on the outer surface of the circular upper protrusion 5, which are distributed circumferentially. The other end of the connecting pin 6 is connected to the circular upper protrusion 5 of the connecting seat 4 and extends radially outward. A plurality of strip-shaped through holes 8 corresponding to the connecting pins 6 are provided on the side wall of the lower end of the sleeve 7. One end of each strip-shaped through hole 8 extending circumferentially is connected to a notch 9 opened on the lower end face of the sleeve 7. The other end of the strip-shaped through hole 8 is lower than the end that is connected to the notch 9. At least one elastic element 10 is provided between the upper end face of the circular upper protrusion 5 embedded in the sleeve 7 and the sleeve 7.

[0027] The valve body 12 has a mounting groove 13 on its lower end face that communicates with the receiving groove 11, and the sleeve 7 is embedded in the mounting groove 13.

[0028] The upper end of the aforementioned firing pin 32 has a radially outward flange 321, and a return spring 15 is provided between the lower end face of the flange 321 and the guide sleeve 14.

[0029] The aforementioned circular protrusion 5 is located directly above the glue outlet channel 42 and is coaxially arranged with the glue outlet channel 42; the four aforementioned connecting pins 6 are arranged at equal intervals along the circumference; the aforementioned elastic element 10 is a butterfly-shaped spring.

[0030] The aforementioned connecting seat 4 has a sealing ring 19 fitted on the outside of the firing pin 32, located inside the guide sleeve 14 and between the glue outlet channel 42.

[0031] Example 2: A piezoelectric injection valve that is easy to disassemble includes: a valve body 12 with an internal receiving groove 11, a glue supply block 2 disposed on the lower outer side of the valve body 12 and having a glue flow channel 1 inside, a nozzle 31, and a striking pin 32. The glue supply block 2, the valve body 12, and the nozzle 31 are connected by a connecting seat 4. The connecting seat 4 has an inlet glue flow channel 41 and an outlet glue flow channel 42 that are respectively connected to each other. The end of the inlet glue flow channel 41 away from the outlet glue flow channel 42 is connected to the glue flow channel 1 on the glue supply block 2. The lower end of the vertically extending outlet glue flow channel 42 away from the inlet glue flow channel 41 is connected to the nozzle 31. The upper end face of the connecting seat 4 has an upwardly extending circular protrusion 5. A sleeve 7 that mates with the circular protrusion 5 is provided inside the valve body 12. An installation hole 51 is provided on the upper end face of the circular protrusion 5 and directly above the glue outlet channel 42. The lower end of a guide sleeve 14 through which the firing pin 32 can pass is threaded into the installation hole 51. The upper end face of the guide sleeve 14 is higher than the upper end face of the circular protrusion 5. The lower end of the firing pin 32, which is movably installed in the guide sleeve 14, passes into the glue outlet channel 42 of the connecting seat 4 and mates with the nozzle 31.

[0032] At least two connecting pins 6 are provided on the outer surface of the circular upper protrusion 5, which are distributed circumferentially. The other end of the connecting pin 6 is connected to the circular upper protrusion 5 of the connecting seat 4 and extends radially outward. A plurality of strip-shaped through holes 8 corresponding to the connecting pins 6 are provided on the side wall of the lower end of the sleeve 7. One end of each strip-shaped through hole 8 extending circumferentially is connected to a notch 9 opened on the lower end face of the sleeve 7. The other end of the strip-shaped through hole 8 is lower than the end that is connected to the notch 9. At least one elastic element 10 is provided between the upper end face of the circular upper protrusion 5 embedded in the sleeve 7 and the sleeve 7.

[0033] The valve body 12 has a mounting groove 13 on its lower end face that communicates with the receiving groove 11, and the sleeve 7 is embedded in the mounting groove 13.

[0034] An annular connecting part 16 is provided above the sleeve 7. The annular connecting part 16 is connected to the sleeve 7 through at least one rib 17. The annular connecting part 16, which has threads on its inner wall, is threaded to the lower end of an mounting rod 18. The upper end of the mounting rod 18, which is screwed into the annular connecting part 16, extends to the top of the valve body 12.

[0035] Two parallel and spaced-apart mounting rods 182 each penetrate the valve body 12 and are located below the annular connecting part 16. The lower end face of the annular connecting part 16 is engaged with the mounting rod 182. An arc-shaped groove is provided on the lower end face of the annular connecting part 16 to engage with the mounting rod 182.

[0036] The glue supply block, nozzle, and connecting seat are assembled into an independent flow channel assembly using bolts and other connecting parts. At the same time, the guide sleeve is installed on the connecting seat by threads. Then, the firing pin passes through the guide sleeve, enters the glue outlet flow channel on the connecting seat, and is positioned close to the nozzle. The return spring is fitted on the outside of the firing pin, so that its two ends contact the flange on the guide sleeve and the firing pin, respectively. Thus, the firing pin and the guide sleeve used to install the firing pin are both integrated with the flow channel assembly as a whole independent of the valve body.

[0037] When it is necessary to install the flow channel assembly, which is equipped with both guide sleeve and striker, onto the valve body, first move the connecting seat upward so that its circular upper protrusion is embedded in the sleeve set inside the valve body and the connecting pin on the circular upper protrusion passes through the notch groove on the lower end face of the sleeve and enters the strip-shaped through hole. During this process, the guide sleeve and striker are simultaneously inserted into the valve body.

[0038] Next, the connecting seat is rotated with the firing pin as the rotation center, so that the connecting pin rotates from one end of the strip-shaped through hole to the other end, and the connecting seat as a whole moves down under the action of the elastic element, so that the connecting pin is stably embedded in the lower end of the strip-shaped through hole, thereby realizing the quick installation between the flow channel assembly and the valve body.

[0039] During use, the lower end of the impact pin that works with the nozzle enters the glue dispensing channel and, through repeated impacts between the impact pin and the nozzle driven by the piezoelectric ceramic, the glue in the dispensing channel is sprayed out from the lower end of the nozzle.

[0040] When the flow channel assembly needs to be cleaned or replaced after a period of use, the flow channel assembly with the guide sleeve and the striker installed can be quickly disassembled from the valve body by simply rotating the connecting seat in the opposite direction with the striker as the rotation center.

[0041] When using the aforementioned easily disassembled piezoelectric jet valve, it can achieve quick disassembly and installation of the flow channel assembly consisting of the glue block, nozzle, and connecting seat to the valve body through rotation without causing adverse interference to components such as the ejector pin. It can also simultaneously disassemble the guide sleeve and the ejector pin installed in the guide sleeve, which facilitates high-frequency cleaning and replacement of the disassembled flow channel assembly, ejector pin, and nozzle to ensure the accuracy and quality of dispensing. It can also ensure the stability of the flow channel assembly and valve body in the connected state.

[0042] 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 piezoelectric injection valve that is easy to disassemble, comprising: The valve body (12) has an internal receiving groove (11), a glue supply block (2) located on the lower outer side of the valve body (12) and having a glue flow channel (1) inside, a nozzle (31) and a striking pin (32), characterized in that: the glue supply block (2), the valve body (12) and the nozzle (31) are connected by a connecting seat (4), and the connecting seat (4) has a glue inlet channel (41) and a glue outlet channel (42) that are interconnected. The end of the glue inlet channel (41) away from the glue outlet channel (42) is connected to the glue flow channel (1) on the glue supply block (2), and the lower end of the vertically extending glue outlet channel (42) away from the glue inlet channel (41) is connected to the nozzle (31). The upper end face of the connecting seat (4) has an upwardly extending circular protrusion (5). A sleeve (7) that mates with the circular protrusion (5) is provided inside the valve body (12). An installation hole (51) is opened on the upper end face of the circular protrusion (5) and directly above the glue outlet channel (42). The lower end of a guide sleeve (14) through which the firing pin (32) can pass is threaded into this installation hole (51). The upper end face of the guide sleeve (14) is higher than the upper end face of the circular protrusion (5). The lower end of the firing pin (32) that is movably installed in the guide sleeve (14) passes into the glue outlet channel (42) of the connecting seat (4) and mates with the nozzle (31). At least two connecting pins (6) are provided on the outer surface of the circular upper protrusion (5) and are spaced apart in the circumferential direction. The other end of the connecting pin (6) is connected to the circular upper protrusion (5) of the connecting seat (4) and extends outward in the radial direction. A number of strip-shaped through holes (8) corresponding to the connecting pins (6) are provided on the side wall of the lower end of the sleeve (7). One end of each strip-shaped through hole (8) extending in the circumferential direction is connected to the notch (9) opened on the lower end face of the sleeve (7). The other end of the strip-shaped through hole (8) is lower than the end connected to the notch (9). At least one elastic element (10) is provided between the upper end face of the circular upper protrusion (5) embedded in the sleeve (7) and the sleeve (7).

2. The easily disassembled piezoelectric injection valve according to claim 1, characterized in that: The valve body (12) has a mounting groove (13) on its lower end face that communicates with the receiving groove (11), and the sleeve (7) is embedded in the mounting groove (13).

3. The easily disassembled piezoelectric injection valve according to claim 1 or 2, characterized in that: An annular connecting part (16) is provided above the sleeve (7). The annular connecting part (16) is connected to the sleeve (7) through at least one rib (17). The annular connecting part (16) with threads on its inner wall is threaded to the lower end of an mounting rod (18). The upper end of the mounting rod (18) with its lower end screwed into the annular connecting part (16) extends to the top of the valve body (12).

4. The easily disassembled piezoelectric injection valve according to claim 3, characterized in that: Two parallel and spaced hanging rods (182) each penetrate the valve body (12) and are located below the annular connecting part (16), the lower end face of which is engaged with the hanging rod (182).

5. The easily disassembled piezoelectric injection valve according to claim 4, characterized in that: The lower end face of the annular connecting part (16) is provided with an arc-shaped groove that cooperates with the hanging rod (182).

6. The easily disassembled piezoelectric injection valve according to claim 1, characterized in that: The upper end of the firing pin (32) has a radially outward flange (321), and a return spring (15) is provided between the lower end face of the flange (321) and the guide sleeve (14).

7. The easily disassembled piezoelectric injection valve according to claim 1, characterized in that: The circular upper protrusion (5) is located directly above the glue outlet channel (42) and is coaxially arranged with the glue outlet channel (42).

8. The easily disassembled piezoelectric injection valve according to claim 1, characterized in that: The four connecting pins (6) are evenly spaced along the circumference.

9. The easily disassembled piezoelectric injection valve according to claim 1, characterized in that: The elastic element (10) is a butterfly-shaped spring.

10. The easily disassembled piezoelectric injection valve according to claim 1, characterized in that: The connecting seat (4) has a sealing ring (19) fitted on the outside of the firing pin (32) and located between the guide sleeve (14) and the glue outlet channel (42).

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