Membrane valve with counter bore

Abstract

The utility model provides a thin film valve with counter bores, which comprises a first plate, a second plate, a plurality of first holes, a plurality of second holes and a plurality of counter bores, a second hole is formed in the position, opposite to the first hole, of the second plate in a penetrating mode, and a third hole is formed in the position, opposite to the counter bore, of the second plate in a penetrating mode; the flap is arranged between the first plate and the second plate, a flap hole is formed in the position, opposite to the counter bore, of the flap in a penetrating mode, and the flap is driven between the first plate and the second plate according to the pressure difference direction change of fluid; the partition plate is arranged between the first plate and the second plate, and a valve movement space allowing the valve to move up and down is formed in the partition plate in a penetrating mode. The flap of the film valve can be well attached to the valve plate, the pressure bearing capacity of the valve is greatly improved, the air leakage problem is avoided, and the film valve has application and popularization value.

Description

Technical Field

[0001] The utility model relates to the technical field of film valves, in particular to a film valve with a countersunk hole. Background Art

[0002] High-frequency one-way valve, in order to operate at some high frequencies, the valve must respond to the high-frequency oscillating pressure, and the oscillating pressure can be rectified to produce a net flow fluid through the pump. Chinese patent CN115574129A discloses a high-frequency one-way valve, including a first plate, a second plate and a control component, the first plate and the second plate are arranged in parallel, a first through-hole group is penetrated on the first plate, and a second through-hole group is penetrated on the second plate. The control component is arranged between the first plate and the second plate, and is used to limit the flow direction of the fluid and control the flow of the fluid through the control component. The control component includes a valve flap and a deformation control member, the valve flap is arranged on the side of the deformation control member close to the first plate, and a third through-hole group is penetrated on the valve flap. When the valve flap is subjected to the fluid pressure entering from the first through-hole group, the valve flap is deformed toward the second plate, and the deformation control member is used to control the deformation range of the valve flap.

[0003] The above-mentioned diaphragm valve in the prior art can support operation at high frequency. However, in the prior art, the holes in the diaphragm are mostly cut by laser or punching. There will be burrs or burnt protrusions at the openings of the diaphragm, which will cause the diaphragm to not fit the valve plate completely. As a result, the diaphragm valve is prone to leakage when the pressure increases, causing the valve to be insufficiently pressure-bearing.

[0004] Therefore, we propose a membrane valve with a countersunk hole to solve the above technical problems. Utility Model Content

[0005] The utility model aims to provide a membrane valve with a countersunk hole to solve the problem that the membrane in the prior art cannot completely fit the valve plate.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a membrane valve with countersunk holes, comprising: a first plate, a plurality of first holes are penetrated in the first plate, and a plurality of countersunk holes are provided in the first plate; a second plate, a second hole is penetrated in the second plate located at a relative position to the first hole, and a third hole is penetrated in the second plate located at a relative position to the countersunk hole; a petal, the petal is arranged between the first plate and the second plate, and a petal hole is penetrated in the petal located at a relative position to the countersunk hole, and the petal is driven between the first plate and the second plate according to the change in the pressure difference direction of the fluid; a spacer, the spacer is arranged between the first plate and the second plate, and a valve movement space for the petal to move up and down is penetrated in the spacer, and a support structure is provided in the membrane petal movement space of the spacer for supporting the space between the first plate and the second plate from being compressed.

[0007] Furthermore, the apertures of the counterbore and the third hole are both larger than the aperture of the petal hole.

[0008] Furthermore, the depth of the countersunk hole is between 10μ and 50μ.

[0009] Furthermore, a soft coating is coated on the surface of the first plate where the countersunk holes are provided.

[0010] Furthermore, a soft coating is coated on a side of the second plate facing the petal.

[0011] Furthermore, the soft coating is one of a silicon-based coating, a fluoride coating or a parylene coating.

[0012] Furthermore, the thickness of the soft coating is between 1μ and 20μ.

[0013] Furthermore, the flap is a PI valve, the thickness of which is less than 10μ.

[0014] Furthermore, when the flap moves under pressure to be in close contact with the first plate, the flap forms a corner with the hole edge of the first hole and with the hole edge of the counterbore respectively.

[0015] Further, the supporting structure is a point-shaped isolation piece arranged at the center of the membrane flap movement space, and the point-shaped isolation piece is separated from the main frame of the partition plate; or the supporting structure is a strip-shaped isolation piece arranged in the membrane flap movement space, and the end of the strip-shaped isolation piece is connected to the main frame of the partition plate, thereby dividing the membrane flap movement space into multiple pieces; or the supporting structure includes a point-shaped isolation piece and tendons and bones, and the point-shaped isolation piece is arranged at the center of the membrane flap movement space, and its opposite ends are respectively connected to the main frame of the partition plate through tendons and bones, thereby dividing the membrane flap movement space into multiple pieces.

[0016] Compared with the existing technology, the above technical solution has the following beneficial effects:

[0017] 1. A countersunk hole is provided on the contact surface between the first plate and the petal, which is opposite to the petal hole. The countersunk hole forms a space for avoiding the glue mark of the petal hole, so that the petal can better fit the first plate and avoid air leakage;

[0018] 2. A soft coating is applied on the side of the first plate where the countersunk hole is provided, which can improve the wear resistance of the petal movement, increase the service life, and further improve the sealing performance after the petal and the first plate are attached;

[0019] 3. The aperture of the countersunk hole and the aperture of the third hole are larger than the aperture of the petal hole, so that the ablation marks on the edge of the petal hole will not contact the sealing plane of the first plate or the second plate during the movement of the petal, thereby ensuring the sealing pressure-bearing capacity of the petal and the first plate or the second plate; in addition, when the petal is attached to the first plate, the petal can form a close corner with the edge of the first hole and the edge of the countersunk hole, so that the petal can withstand a larger pressure difference to ensure that the fluid does not flow back from the second plate to the first plate, so that the one-way membrane valve can withstand a larger pressure difference.

[0020] In summary, the petals of the film valve of the present application can fit the valve plate well, greatly improving the pressure-bearing capacity of the valve, avoiding air leakage problems, and having promotion and application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 It is a structural schematic diagram of the utility model;

[0023] Figure 2 It is a schematic diagram of the local structure when the petal 3 and the first plate 1 are attached to each other in the utility model;

[0024] Figure 3 It corresponds to Figure 2 A magnified view of part A in FIG.

[0025] Figure 4 It is a schematic diagram of the local structure when the petal 3 and the second plate 2 are attached to each other in the utility model;

[0026] Figure 5 It is a partial structural schematic diagram of the utility model when a soft coating 13 is provided on one side of the first plate 1 located at the counterbore 12;

[0027] Figure 6 This is another schematic diagram of the structure of the middle partition 4 of the utility model;

[0028] Figure 7 It is another schematic diagram of the structure of the middle partition 4 of the utility model.

[0029] Explanation of the accompanying drawings: 1. first plate; 11. first hole; 12. countersunk hole; 13. soft coating; 2. second plate; 21. second hole; 22. third hole; 3. petal; 31. petal hole; 32. corner; 4. spacer; 41. valve movement space; 42. point-shaped spacer; 421. tendons; 43. strip-shaped spacer. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail in combination with the embodiments below. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0031] In view of the problems existing in the prior art, the utility model provides a membrane valve with a countersunk hole. The utility model is described in detail below in conjunction with the accompanying drawings.

[0032] See also Figure 1-Figure 7 As shown, the technical solution adopted in this specific embodiment is: a film valve with countersunk holes, which can be used at high frequencies. The film valve specifically includes a first plate 1, a second plate 2, a flap 3, and a spacer plate 4. The first plate 1 and the second plate 2 are arranged in parallel up and down, and are not limited to the first plate 1 being arranged at the top or the second plate 2 being arranged at the top. A plurality of uniformly distributed first holes 11 are vertically penetrated in the first plate 1, and a plurality of non-penetrated countersunk holes 12 are opened on the side of the first plate 1 facing the second plate 2. The plurality of first holes 11 and the plurality of countersunk holes 12 are evenly staggered. The second plate 2 is vertically penetrated with a second hole 21 at a position relative to the first hole 11, and the second plate 2 is vertically penetrated with a third hole 22 at a position relative to the countersunk hole 12. The flap 3 is arranged between the first plate 1 and the second plate 2 and can move up and down. A plurality of flap holes 31 are opened through the flap 3. The countersunk hole 12 on the first plate 1 is opened on the fitting surface with the flap 3. The plurality of flap holes 31 are arranged one by one with the plurality of countersunk holes 12. The flap holes 31 are opened at the relative position of the third hole 22 and are aligned with the third hole 22. The flap 3 is driven between the first plate 1 and the second plate 2 according to the change in the pressure difference direction of the fluid. The partition plate 4 is arranged between the first plate 1 and the second plate 2, and a valve movement space 41 is opened through the partition plate 4 for the flap 3 to move up and down. The size of the valve movement space 41 is preferably set at 30μ-50μ. When the flap 3 is pressed against the second plate 2 under pressure, the first hole 11, the flap hole 31, and the third hole 22 form a channel for facilitating the flow of fluid.

[0033] The spacer plate 4 may be arranged between the flap 3 and the first plate 1 or between the flap 3 and the second plate 2 .

[0034] Specifically, the countersunk hole 12 can be formed on the first plate 1 by etching or machining.

[0035] Furthermore, the depth of the countersunk hole 12 should be greater than the size of the burrs and glue marks on the flap hole 31, the depth of the countersunk hole 12 is between 10μ-50μ, and the aperture size of the countersunk hole 12 is greater than the aperture size of the flap hole 31. At this time, when the pressure on the first plate 1 surface is greater than the pressure on the second plate 2 surface under the action of the pressure difference, the flap 3 moves to be close to the second plate 2 surface, and the fluid can flow through the first hole 11, the flap hole 31, the valve movement space 41, and the third hole 22 to the second plate 2 surface; when the pressure on the first plate 1 surface is less than the second plate 2 surface, the flap 3 moves to be close to the first plate 1 surface under the action of pressure, and the flap 3 forms a close corner 32 with the hole edge of the first hole 11 and the hole edge of the countersunk hole 12, so that the flap 3 can withstand a larger pressure difference to ensure that the fluid does not flow back from the second plate 2 to the first plate 1 surface, so that the unidirectional flow of the membrane valve can be achieved and it can withstand a larger pressure difference.

[0036] Furthermore, in order to improve the processing burrs on the edges of the first hole 11 and the counterbore 12 and improve the sealing performance between the first plate 1 and the petal 3, a soft coating 13 can be applied to the side of the first plate 1 where the counterbore 12 is provided. The soft coating 13 can improve the movement and wear resistance of the petal 3, increase its service life, and can improve the sealing performance between the plate and the petal 3.

[0037] Preferably, the material of the soft coating 13 may be silicon-based, fluoride or parylene, etc., and the thickness thereof may be between 1μ and 20μ.

[0038] Furthermore, the above-mentioned soft coating 13 may also be added on the surface of the second plate 2 facing the petal 3 to increase the life of the petal 3 .

[0039] Furthermore, a coating similar to the soft coating 13 may be added to the surfaces of the first plate 1 and the second plate 2 that do not participate in the motion friction, so as to improve the difficulty of single-sided processing during the manufacturing process.

[0040] Furthermore, the material of the petal 3 is preferably PI material (polyimide). To meet the high-frequency action, the mass of the petal 3 is required to be as small as possible. The thickness of the petal 3 should be less than 10μ, preferably, the thickness of the petal 3 is less than 5μ. In addition, the aperture of the petal hole 31 is set between 0.1μ-0.6μ, and the hole can be opened by laser ablation, and the ablation glue mark is controlled to be less than 5μ. Preferably, the ablation glue mark should be controlled to be less than 2μ.

[0041] Preferably, the aperture of the flap hole 31 is smaller than the aperture of the counterbore 12 and the third hole 22, so that during the movement of the flap 3, the ablation marks on the edge of the flap hole 31 will not contact the sealing plane of the first plate 1 or the second plate 2, and the sealing pressure bearing capacity of the flap 3 and the first plate 1 or the second plate 2 can be guaranteed. At this time, when the flap 3 moves under pressure to the surface close to the second plate 2, the flap 3 fits with the edge of the second hole 21 and the third hole 22 on the second plate 2 to form a corner 32.

[0042] Furthermore, the partition plate 4 is provided with a support structure in the membrane flap movement space 41 for supporting the space between the first plate 1 and the second plate 2 from being compressed, thereby preventing the first plate 1 and the second plate 2 from collapsing and bonding, and losing the movement space of the flap 3 .

[0043] Specifically, the support structure is a dot-shaped spacer 42 disposed at the center of the membrane flap movement space 41. At this time, the dot-shaped spacer 42, the membrane flap movement space 41 and the center of the main frame of the partition plate 4 are located at the same place, and the main frame of the partition plate 4 is annular. The dot-shaped spacer 42 can be a circular, elliptical, square or other shaped spacer, and a through hole can be opened through the center of the dot-shaped spacer 42.

[0044] Or the supporting structure is a strip-shaped spacer 43 provided in the membrane flap motion space 41, the end of the strip-shaped spacer 43 is connected to the main frame of the partition plate 4, and the membrane flap motion space 41 is divided into a plurality of spaces. Here, the strip-shaped spacer 43 is not limited to an "I"-shaped or "cross"-shaped structure, and the membrane flap motion space 41 is divided into two or four spaces.

[0045] Or the supporting structure includes a dot-shaped spacer 42 and a rib 421. The dot-shaped spacer 42 is arranged at the center of the membrane flap movement space 41, so that the membrane flap movement space 41 forms an annular space. The opposite ends of the dot-shaped spacer 42 are respectively connected to the main frame of the partition plate 4 through the rib 421, so that the membrane flap movement space 41 is divided into multiple spaces. The rib 421 can be provided in one pair or two pairs.

[0046] The valve movement space 42 is preferably divided into two. Of course, the valve movement space 42 can also be divided into three or four.

[0047] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0048] The above description is only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. A membrane valve with a countersunk hole, characterized in that: include: A first plate, wherein a plurality of first holes are formed through the first plate, and a plurality of countersunk holes are formed in the first plate; A second plate, wherein the second plate is provided with a second hole at a position opposite to the first hole, and a third hole is provided at a position opposite to the counterbore; A flap, the flap is arranged between the first plate and the second plate, and the flap is located at a relative position of the counterbore and has a flap hole extending therethrough, and the flap is driven between the first plate and the second plate according to a change in the pressure difference direction of the fluid; A spacer plate is arranged between the first plate and the second plate, and a valve movement space is provided through the spacer plate for the petals to move up and down. A support structure is provided in the spacer plate in the valve movement space to support the space between the first plate and the second plate from being compressed.

2. The membrane valve with countersunk hole according to claim 1, characterized in that: The apertures of the counterbore and the third hole are both larger than the aperture of the petal hole.

3. The membrane valve with countersunk holes according to any one of claims 1 or 2, characterized in that: The depth of the countersunk hole is between 10μ and 50μ.

4. The membrane valve with countersunk hole according to claim 1, characterized in that: A soft coating is coated on the surface of the first plate where the countersunk holes are opened.

5. The membrane valve with countersunk hole according to claim 1, characterized in that: The second plate is coated with a soft coating on one side facing the petal.

6. The membrane valve with countersunk holes according to any one of claims 4 or 5, characterized in that: The soft coating is one of a silicon-based coating, a fluoride coating or a parylene coating.

7. The film valve with countersunk holes according to any one of claims 4 or 5, characterized in that: The thickness of the soft coating is between 1μ and 20μ.

8. The membrane valve with countersunk hole according to claim 1, characterized in that: The flap is a polyimide flap with a thickness less than 10μ.

9. The membrane valve with countersunk hole according to claim 1, characterized in that: When the flap moves to be in close contact with the first plate under the action of pressure, the flap forms a corner with the hole edge of the first hole and with the hole edge of the counterbore respectively.

10. The membrane valve with countersunk holes according to claim 1, characterized in that: The supporting structure is a dot-shaped isolation piece arranged at the center of the membrane flap movement space, and the dot-shaped isolation piece is separated from the main frame of the partition plate; Or the supporting structure is a strip-shaped isolation sheet arranged in the membrane flap movement space, and the end of the strip-shaped isolation sheet is connected to the main frame of the partition plate, so as to divide the membrane flap movement space into a plurality of sections; Or the supporting structure includes point-shaped isolation plates and tendons. The point-shaped isolation plates are arranged at the center of the membrane flap movement space, and the opposite ends thereof are respectively connected to the main frame of the partition plate through tendons, thereby dividing the membrane flap movement space into multiple parts.

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