Miniature two-position two-way proportional valve

Abstract

The utility model relates to a miniature two-position two-way proportional valve which comprises a valve body assembly and a valve core assembly, the valve body assembly comprises a first air nozzle, a second air nozzle and a valve body, the first air nozzle is provided with a first vent hole, and the second air nozzle is provided with a second vent hole. The valve body is provided with an airflow channel, a first air tap mounting hole, a second air tap mounting hole, a valve core mounting hole and a third vent hole, the first air tap is connected to the first air tap mounting hole and is adjustable in position, the second air tap is connected to the second air tap mounting hole and is adjustable in position, and the airflow channel is communicated with the first vent hole, the second vent hole and the third vent hole; the valve element assembly comprises a positioning seat and a piezoelectric ceramic piece, the positioning seat is connected into the valve element mounting hole, the piezoelectric ceramic piece is located in the airflow channel and connected to the positioning seat, and the piezoelectric ceramic piece is arranged between the first air nozzle and the second air nozzle. The utility model not only has a simple structure, but also reduces the manufacturing difficulty, and the requirement on position accuracy is easy to realize.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a miniature two-position two-way proportional valve. Background Technology

[0002] Traditional two-position two-way proportional valves use electromagnetic technology as the electrical conversion element to convert electrical signals into pneumatic signals. Due to their simple structure, low cost, and reliable operation, they have been widely used. However, they suffer from high power consumption, slow response, large size, and poor vibration resistance, making them unsuitable for miniaturized and intelligent applications.

[0003] The miniature two-position two-way proportional valve uses piezoelectric technology as its electrical conversion element. Its principle utilizes the inverse piezoelectric effect of piezoelectric ceramics, offering advantages such as small size, light weight, low power consumption, fast response, and strong shock resistance, meeting the requirements of miniaturized intelligent systems. The electrical conversion element of the miniature two-position two-way proportional valve is a miniature precision component; the relative positional accuracy of the two nozzles and the piezoelectric ceramic component significantly affects the overall valve performance. Existing products use a single adjustable nozzle to adjust their relative position. This only guarantees the relative positional accuracy of one nozzle and the piezoelectric valve plate; the relative positional accuracy of the other nozzle and the piezoelectric valve plate is ensured through manufacturing precision, which increases the manufacturing difficulty. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to provide a miniature two-position two-way proportional valve that is small in size, light in weight, low in power consumption, fast in response, strong in shock resistance, meets the requirements of micro-intelligentization, and is relatively easy to manufacture.

[0005] To solve the above-mentioned technical problems, this utility model provides a miniature two-position two-way proportional valve, comprising:

[0006] A valve body assembly includes a first air nozzle, a second air nozzle, and a valve body. The first air nozzle has a first vent hole, and the second air nozzle has a second vent hole. The valve body has an airflow channel, a first air nozzle mounting hole, a second air nozzle mounting hole, a valve core mounting hole, and a third vent hole. The first air nozzle mounting hole and the second air nozzle mounting hole are respectively provided on two opposite side walls of the airflow channel. The first air nozzle is connected to the first air nozzle mounting hole, and the axial position of the first air nozzle is adjustable along the first air nozzle mounting hole. The second air nozzle is connected to the second air nozzle mounting hole, and the axial position of the second air nozzle is adjustable along the second air nozzle mounting hole. The openings of the first vent hole and the second vent hole are arranged opposite to each other. The airflow channel connects the first vent hole, the second vent hole, and the third vent hole.

[0007] A valve core assembly includes a positioning seat and a piezoelectric ceramic component. The positioning seat is connected to the valve core mounting hole, and the piezoelectric ceramic component is located in the airflow channel and connected to the positioning seat. The piezoelectric ceramic component is disposed between the first air nozzle and the second air nozzle.

[0008] In the first working state, the piezoelectric ceramic component moves to the position that blocks the first vent hole;

[0009] In the second operating state, the piezoelectric ceramic component moves to the position of blocking the second vent hole.

[0010] Furthermore, the first air nozzle is threadedly connected to the first air nozzle mounting hole, and the second air nozzle is threadedly connected to the second air nozzle mounting hole.

[0011] Furthermore, the positioning seat is provided with a positioning hole, one end of the piezoelectric ceramic component extends into the positioning hole, and the other end of the piezoelectric ceramic component extends into the airflow channel.

[0012] Furthermore, the openings of the first vent and the second vent protrude from the inner wall of the airflow channel.

[0013] Furthermore, the valve body assembly also includes a first sealing ring and a second sealing ring, wherein the first sealing ring is disposed between the first air nozzle and the first air nozzle mounting hole, and the second sealing ring is disposed between the second air nozzle and the second air nozzle mounting hole.

[0014] Furthermore, the valve core mounting hole extends through one end of the airflow channel, and the two form a stepped hole. The valve core mounting hole is the larger hole of the stepped hole, and the airflow channel is the smaller hole of the stepped hole.

[0015] Furthermore, the valve core assembly also includes a sealing sleeve, which includes a cylindrical portion, a bottom portion, and an annular portion. The outer edge of the bottom portion is connected to one end of the cylindrical portion, and the inner edge of the annular portion is connected to the other end of the cylindrical portion. The cylindrical portion is fitted onto the piezoelectric ceramic component, and the annular portion is located between the positioning seat and the stepped surface of the stepped hole.

[0016] Furthermore, the sealing sleeve is a silicone sleeve.

[0017] Furthermore, the first vent hole penetrates the sidewall of the airflow channel.

[0018] Furthermore, the first air nozzle mounting hole and the second air nozzle mounting hole are coaxially arranged, and the first vent hole and the second vent hole are coaxially arranged.

[0019] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art:

[0020] 1) The miniature two-position two-way proportional valve described in this utility model uses piezoelectric technology as an electrical conversion element. Its principle is to utilize the inverse piezoelectric effect of piezoelectric ceramics. It has the advantages of small size, light weight, low power consumption, fast response and strong shock resistance, which can meet the requirements of miniature intelligence. The positions of the first air nozzle and the second air nozzle are adjustable, which not only makes the structure simple and the position accuracy requirements easy to achieve, but also reduces the manufacturing difficulty.

[0021] 2) The miniature two-position two-way proportional valve of this utility model has a first air nozzle threadedly connected to a first air nozzle mounting hole and a second air nozzle threadedly connected to a second air nozzle mounting hole. The position adjustment operation of the first air nozzle and the second air nozzle is simple.

[0022] 3) The miniature two-position two-way proportional valve of this utility model has one end of the piezoelectric ceramic component connected to the positioning seat, and the other end can be deflected to achieve the purpose of sealing the first vent and the second vent of the piezoelectric ceramic component.

[0023] 4) In the miniature two-position two-way proportional valve of this utility model, the openings of the first vent and the second vent protrude from the inner wall of the airflow channel, and the piezoelectric ceramic component will not contact the inner wall of the airflow channel when blocking the first vent and the second vent.

[0024] 5) The miniature two-position two-way proportional valve of this utility model, by setting a first sealing ring and a second sealing ring, ensures that there is no air leakage at the connection between the first air nozzle and the valve body, and there is also no air leakage at the connection between the second air nozzle and the valve body. This guarantees that the entire proportional valve will not leak during use;

[0025] 6) The miniature two-position two-way proportional valve of this utility model has a stepped hole formed by the airflow channel and the valve core mounting hole, which can ensure the installation accuracy of the positioning seat.

[0026] 7) The miniature two-position two-way proportional valve of this utility model, by setting a sealing sleeve, not only protects the piezoelectric ceramic component, but also improves the sealing performance.

[0027] 8) The miniature two-position two-way proportional valve of this utility model has a silicone sealing sleeve, which ensures both the protective and sealing performance of the sealing sleeve.

[0028] 9) The miniature two-position two-way proportional valve of this utility model has a first through hole that passes through the side of the airflow channel, and the first vent hole is easier to process and manufacture.

[0029] 10) The miniature two-position two-way proportional valve of this utility model has a first air nozzle mounting hole, a second air nozzle mounting hole, a first vent hole and a second vent hole arranged coaxially, making it easier to adjust the positional relationship between the piezoelectric ceramic component and the first vent hole and the second vent hole. Attached Figure Description

[0030] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0031] Figure 1 This is a schematic diagram of the structure of the miniature two-position two-way proportional valve disclosed in this utility model.

[0032] Figure 2 This is a schematic diagram of the sealing sleeve disclosed in this utility model.

[0033] Explanation of reference numerals in the accompanying drawings: 11. First air nozzle; 111. First vent hole; 12. Second air nozzle; 121. Second vent hole; 13. Valve body; 131. Airflow passage; 132. First air nozzle mounting hole; 133. Second air nozzle mounting hole; 134. Valve core mounting hole; 135. Third vent hole; 14. First sealing ring; 15. Second sealing ring;

[0034] 21. Positioning seat; 211. Positioning hole; 22. Piezoelectric ceramic component; 23. Sealing sleeve; 231. Cylindrical part; 232. Bottom; 233. Annular part. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0036] See Figure 1 and Figure 2 The figure shows an embodiment of a miniature two-position two-way proportional valve.

[0037] Miniature two-position two-way proportional valves include:

[0038] The valve body assembly includes a first air nozzle 11, a second air nozzle 12, and a valve body 13. The first air nozzle 11 has a first vent hole 111, the second air nozzle 12 has a second vent hole 121, and the valve body 13 has an airflow channel 131, a first air nozzle mounting hole 132, a second air nozzle mounting hole 133, a valve core mounting hole 134, and a third vent hole 135. The first air nozzle mounting hole 132 and the second air nozzle mounting hole 133 are respectively provided on two opposite side walls of the airflow channel 131. The first air nozzle... 11 is connected to the first air nozzle mounting hole 132 and the axial position of the first air nozzle 11 along the first air nozzle mounting hole 132 is adjustable; the second air nozzle 12 is connected to the second air nozzle mounting hole 133 and the axial position of the second air nozzle 12 along the second air nozzle mounting hole 133 is adjustable; the openings of the first vent hole 111 and the second vent hole 121 are arranged opposite to each other; the airflow channel 131 connects the first vent hole 111, the second vent hole 121 and the third vent hole 135.

[0039] The valve core assembly includes a positioning seat 21 and a piezoelectric ceramic component 22. The positioning seat 21 is connected to the valve core mounting hole 134. The piezoelectric ceramic component 22 is located in the airflow channel 131 and connected to the positioning seat 21. The piezoelectric ceramic component 22 is disposed between the first air nozzle 11 and the second air nozzle 12.

[0040] In the first working state, the piezoelectric ceramic component 22 moves to the position that blocks the first vent 111;

[0041] In the second working state, the piezoelectric ceramic component 22 moves to the position that blocks the second vent 121.

[0042] Piezoelectric ceramics exhibit both piezoelectric and inverse piezoelectric effects. When the external force F = 0, a surface charge exists on the surface of the piezoelectric ceramic, equal in magnitude but opposite in sign to the bound charge, thus the crystal does not display electrical properties. Under the action of the external force F, the piezoelectric ceramic deforms, the polarization intensity of the crystal changes, and therefore the surface bound charge changes, causing the crystal to display electrical properties—the piezoelectric effect. Applying an electric field to the piezoelectric ceramic, if the direction of the electric field is the same as the polarization direction, the polarization of the crystal is strengthened, and the crystal elongates along the polarization direction, producing a deformation—inverse piezoelectric effect. If a reverse field is applied, the crystal shortens along the polarization direction. If an alternating electric field is applied, the crystal vibrates. By applying different electric fields to the piezoelectric ceramic component 22, the piezoelectric ceramic component 22 is moved closer together between the first air nozzle 11 and the second air nozzle 12.

[0043] Through the above technical solution, the two-position two-way proportional valve has the advantages of small size, light weight, low power consumption, fast response and strong shock resistance, which can meet the requirements of micro-intelligentization. The positions of the first air nozzle 11 and the second air nozzle 12 are adjustable, which not only simplifies the structure and makes it easy to achieve the required positional accuracy, but also reduces the manufacturing difficulty.

[0044] In this embodiment, the first air nozzle 11 is threadedly connected to the first air nozzle mounting hole 132, and the second air nozzle 12 is threadedly connected to the second air nozzle mounting hole 133.

[0045] The first air nozzle 11 and the second air nozzle 12 are machined with external threads, and the first air nozzle mounting hole 132 and the second air nozzle mounting hole 133 are machined with internal threads. The external thread of the first air nozzle 11 is connected to the internal thread of the first air nozzle mounting hole 132, and the external thread of the second air nozzle 12 is connected to the internal thread of the second air nozzle mounting hole 133. When the first air nozzle 11 is rotated, the first air nozzle 11 moves axially along the first air nozzle mounting hole 132, and when the second air nozzle 12 is rotated, the second air nozzle 12 moves axially along the first air nozzle mounting hole 132.

[0046] With the above technical solution, the position adjustment operation of the first air nozzle 11 and the second air nozzle 12 is simple.

[0047] In this embodiment, the positioning seat 21 is provided with a positioning hole 211, one end of the piezoelectric ceramic component 22 extends into the positioning hole 211, and the other end of the piezoelectric ceramic component 22 extends into the airflow channel 131.

[0048] One end of the piezoelectric ceramic component 22 is fixed by the positioning seat 21, and the other end of the piezoelectric ceramic component 22 is suspended and can be deflected, so that the suspended end of the piezoelectric ceramic component 22 can move between the first air nozzle 11 and the second air nozzle 12.

[0049] The above technical solution can achieve the purpose of sealing the first vent 111 and the second vent 121 by the piezoelectric ceramic component 22.

[0050] In this embodiment, the openings of the first vent 111 and the second vent 121 protrude from the inner wall of the airflow channel 131.

[0051] The openings of the first vent 111 and the second vent 121 protrude from the inner wall of the airflow channel 131. This can be because the first nozzle 11 and the second nozzle 12 protrude from the inner wall of the airflow channel 131. Alternatively, the inner wall of the airflow channel 131 can be a flat surface or a partially protruding surface (the positions of the first nozzle mounting holes and the second nozzle mounting holes are set).

[0052] Through the above technical solution, the piezoelectric ceramic 22 will not come into contact with the inner wall of the airflow channel 131 when blocking the first vent 111 and the second vent 121.

[0053] In this embodiment, the valve body assembly 1 further includes a first sealing ring 14 and a second sealing ring 15. The first sealing ring 14 is disposed between the first air nozzle 11 and the first air nozzle mounting hole 132, and the second sealing ring 15 is disposed between the second air nozzle 12 and the second air nozzle mounting hole 133.

[0054] The first sealing ring 14 and the second sealing ring 15 are ring-shaped elastic bodies, such as rubber rings, which are squeezed between the two surfaces that need to be sealed. The first sealing ring 14 is squeezed between the first air nozzle 11 and the first air nozzle mounting hole 132. The first air nozzle 11 is provided with a first annular groove, and the first sealing ring 14 is partially fitted into the first annular groove. The second sealing ring 15 is squeezed between the second air nozzle 12 and the second air nozzle mounting hole 133. The second air nozzle 12 is provided with a second annular groove, and the second sealing ring 15 is partially fitted into the second annular groove.

[0055] With the above technical solution, there will be no air leakage at the connection between the first air nozzle 11 and the valve body 13, and there will be no air leakage at the connection between the second air nozzle 12 and the valve body 13, ensuring that the entire proportional valve will not leak during use.

[0056] In this embodiment, the valve core mounting hole 134 passes through one end of the airflow channel 131 and the two form a stepped hole. The valve core mounting hole 134 is the large hole of the stepped hole, and the airflow channel 131 is the small hole of the stepped hole.

[0057] The aforementioned positioning seat 21 is installed inside the large hole of the aforementioned stepped hole, and it abuts against the stepped surface of the stepped hole, which is equivalent to the aforementioned positioning seat 21 being positioned along its axial direction.

[0058] Through the above technical solution, the installation accuracy of the positioning seat 21 can be guaranteed.

[0059] In this embodiment, the valve core assembly 2 further includes a sealing sleeve 23, which includes a cylindrical portion 231, a bottom portion 232, and an annular portion 233. The outer edge of the bottom portion 232 is connected to one end of the cylindrical portion 231, and the inner edge of the annular portion 233 is connected to the other end of the cylindrical portion 231. The cylindrical portion 231 is sleeved on the piezoelectric ceramic component 22, and the annular portion 233 is located between the positioning seat 21 and the stepped surface of the stepped hole.

[0060] The cross-section of the cylindrical portion 231 matches the cross-section of the piezoelectric ceramic component 22. Generally, the piezoelectric ceramic component is sheet-shaped, and the cross-section of the cylindrical portion 231 is rectangular. When the piezoelectric ceramic component 22 is energized and deflected, the sealing sleeve 23 moves accordingly. When the sealing sleeve 23 contacts the first air nozzle 11 or the second air nozzle 12, the sealing sleeve 23 performs a sealing function, which can block the gas in the first air nozzle 11 or the second air nozzle 12.

[0061] Through the above technical solution, the sealing sleeve 23 not only protects the piezoelectric ceramic component 22, but also improves the sealing performance.

[0062] In this embodiment, the sealing sleeve 23 is a silicone sleeve.

[0063] The advantages of silicone materials are that they have good heat and cold resistance, good compatibility, and a good feel. The main component of silicone is silicon dioxide, which has relatively stable chemical properties.

[0064] Through the above technical solution, the protective and sealing performance of the sealing sleeve 23 can be guaranteed.

[0065] In this embodiment, the first vent 111 penetrates the side wall of the airflow channel 131.

[0066] One end of the first vent 111 penetrates the outer wall of the valve body 13, and the inner end of the first vent 111 penetrates the inner wall of the airflow channel 131.

[0067] With the above technical solution, the first vent 111 is easier to process and manufacture.

[0068] In this embodiment, the first air nozzle mounting hole 132 and the second air nozzle mounting hole 133 are coaxially arranged, and the first vent hole 111 and the second vent hole 121 are coaxially arranged.

[0069] The central axis of the first air nozzle mounting hole 132 and the central axis of the second air nozzle mounting hole 133 are on the same straight line, and the central axes of the first vent hole 111 and the second vent hole 121 are on the same straight line.

[0070] With the above technical solution, the positional relationship between the piezoelectric ceramic component 22 and the first vent 111 and the second vent 121 is easier to adjust.

[0071] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A miniature two-position two-way proportional valve, characterized in that, include: A valve body assembly includes a first air nozzle, a second air nozzle, and a valve body. The first air nozzle has a first vent hole, and the second air nozzle has a second vent hole. The valve body has an airflow channel, a first air nozzle mounting hole, a second air nozzle mounting hole, a valve core mounting hole, and a third vent hole. The first air nozzle mounting hole and the second air nozzle mounting hole are respectively provided on two opposite side walls of the airflow channel. The first air nozzle is connected to the first air nozzle mounting hole, and the axial position of the first air nozzle is adjustable along the first air nozzle mounting hole. The second air nozzle is connected to the second air nozzle mounting hole, and the axial position of the second air nozzle is adjustable along the second air nozzle mounting hole. The openings of the first vent hole and the second vent hole are arranged opposite to each other. The airflow channel connects the first vent hole, the second vent hole, and the third vent hole. A valve core assembly includes a positioning seat and a piezoelectric ceramic component. The positioning seat is connected to the valve core mounting hole, and the piezoelectric ceramic component is located in the airflow channel and connected to the positioning seat. The piezoelectric ceramic component is disposed between the first air nozzle and the second air nozzle. In the first working state, the piezoelectric ceramic component moves to the position that blocks the first vent hole; In the second operating state, the piezoelectric ceramic component moves to the position of blocking the second vent hole.

2. The miniature two-position two-way proportional valve according to claim 1, characterized in that, The first air nozzle is threadedly connected to the first air nozzle mounting hole, and the second air nozzle is threadedly connected to the second air nozzle mounting hole.

3. The miniature two-position two-way proportional valve according to claim 1, characterized in that, The positioning seat is provided with a positioning hole, one end of the piezoelectric ceramic component extends into the positioning hole, and the other end of the piezoelectric ceramic component extends into the airflow channel.

4. The miniature two-position two-way proportional valve according to claim 1, characterized in that, The openings of the first vent and the second vent protrude from the inner wall of the airflow channel.

5. The miniature two-position two-way proportional valve according to claim 1, characterized in that, The valve body assembly further includes a first sealing ring and a second sealing ring, wherein the first sealing ring is disposed between the first air nozzle and the first air nozzle mounting hole, and the second sealing ring is disposed between the second air nozzle and the second air nozzle mounting hole.

6. The miniature two-position two-way proportional valve according to claim 1, characterized in that, The valve core mounting hole extends through one end of the airflow channel, and the two form a stepped hole. The valve core mounting hole is the larger hole of the stepped hole, and the airflow channel is the smaller hole of the stepped hole.

7. The miniature two-position two-way proportional valve according to claim 6, characterized in that, The valve core assembly further includes a sealing sleeve, which includes a cylindrical portion, a bottom portion, and an annular portion. The outer edge of the bottom portion is connected to one end of the cylindrical portion, and the inner edge of the annular portion is connected to the other end of the cylindrical portion. The cylindrical portion is fitted onto the piezoelectric ceramic component, and the annular portion is located between the positioning seat and the stepped surface of the stepped hole.

8. The miniature two-position two-way proportional valve according to claim 7, characterized in that, The sealing sleeve is a silicone sleeve.

9. The miniature two-position two-way proportional valve according to claim 1, characterized in that, The first vent hole penetrates the side wall of the airflow channel.

10. The miniature two-position two-way proportional valve according to claim 1, characterized in that, The first air nozzle mounting hole and the second air nozzle mounting hole are coaxially arranged, and the first vent hole and the second vent hole are coaxially arranged.

Images