Diaphragm valve having counterbores

Abstract

A diaphragm valve having counterbores, comprising: a first plate, provided with a plurality of first holes running through the first plate and a plurality of counterbores; a second plate, provided with second holes running through the second plate at the positions of the second plate opposite to the first holes, and third holes running through the second plate at the positions of the second plate opposite to the counterbores; a flap, arranged between the first plate and the second plate, wherein the flap is provided with flap holes running through the flap at the positions of the flap opposite to the counterbores, and the flap is driven between the first plate and the second plate on the basis of a change in the direction of a fluid pressure difference; and a partition plate, arranged between the first plate and the second plate, wherein the partition plate is provided with valve movement spaces passing through the partition plate and allowing the flap to move up and down. The flap of the diaphragm valve can fit well against valve plates, greatly improving the pressure bearing capacity of the valve, and avoiding the problem of air leakage.

Description

A diaphragm valve with a countersunk hole Technical Field

[0001] This invention relates to the field of diaphragm valve technology, and more specifically to a diaphragm valve with a countersunk hole. Background Technology

[0002] A high-frequency check valve, in order to operate at certain high frequencies, must respond to high-frequency oscillating pressure, which can be rectified to generate a net flow rate of fluid through a pump. Chinese patent CN115574129A discloses a high-frequency check valve including a first plate, a second plate, and a control assembly. The first and second plates are arranged in parallel. A first set of through holes is formed through the first plate, and a second set of through holes is formed through the second plate. The control assembly is disposed between the first and second plates to restrict the flow direction of the fluid and control the flow rate of the fluid passing through the control assembly. The control assembly includes a valve disc and a deformation control element. The valve disc is disposed on the side of the deformation control element closer to the first plate, and a third set of through holes is formed through the valve disc. When the valve disc is subjected to fluid pressure entering through the first set of through holes, the valve disc deforms towards the second plate. The deformation control element controls the deformation range of the valve disc.

[0003] The diaphragm valves in the prior art can support high-frequency operation. However, the openings of the diaphragm in the prior art are mostly cut by laser or stamping. There will be burrs or charred 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 air leakage when the pressure increases, resulting in insufficient valve pressure resistance.

[0004] To address these technical problems, we propose a diaphragm valve with a countersunk hole. Technical issues

[0005] The purpose of this invention is to provide a diaphragm valve with a countersunk hole to solve the problem that the diaphragm in the prior art cannot completely adhere to the valve plate. Technical solutions

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a diaphragm valve with countersunk holes, comprising: 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 a second hole is formed through the second plate at a position relative to the first holes, and a third hole is formed through the second plate at a position relative to the countersunk holes; a flap, wherein the flap is disposed between the first plate and the second plate, and a flap hole is formed through the flap at a position relative to the countersunk holes, and the flap is driven between the first plate and the second plate according to the change in the direction of the fluid pressure difference; a spacer, wherein the spacer is disposed between the first plate and the second plate, and a valve movement space for the flap to move up and down is formed through the spacer, and the spacer is provided with a support structure in the valve movement space to support the space between the first plate and the second plate from being compressed.

[0007] Furthermore, the diameters of both the countersunk hole and the third hole are larger than the diameter of the flap hole.

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

[0009] Furthermore, a soft coating is applied to the surface of the first plate where the countersunk holes are formed.

[0010] Furthermore, a soft coating is applied to the side of the second plate facing the petals.

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

[0012] Furthermore, the thickness of the flexible coating is between 1 μm and 20 μm.

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

[0014] Furthermore, when the petal moves under pressure to press against the first plate, the petal forms an angle with the edge of the first hole and the edge of the countersunk hole, respectively.

[0015] Furthermore, the supporting structure is a dot-shaped isolation plate located at the center of the valve movement space, and the dot-shaped isolation plate is separate from the main frame of the spacer; or the supporting structure is a strip-shaped isolation plate located in the valve movement space, and the ends of the strip-shaped isolation plate are connected to the main frame of the spacer, dividing the valve movement space into multiple sections; or the supporting structure includes a dot-shaped isolation plate and ribs, the dot-shaped isolation plate is located at the center of the valve movement space, and its opposite ends are connected to the main frame of the spacer through ribs, dividing the valve movement space into multiple sections. Beneficial effects

[0016] Compared with existing technologies, the above technical solution has the following advantages:

[0017] 1. By creating countersunk holes on the contact surface between the first plate and the petal, which are opposite to the petal holes, the countersunk holes form a space to avoid adhesive residue from the petal holes, thereby allowing the petal to fit better against the first plate and avoiding air leakage.

[0018] 2. Applying a soft coating to the side of the first plate where the countersunk hole is formed can improve the wear resistance of the flap movement, increase the service life, and further improve the sealing performance after the flap is bonded to the first plate;

[0019] 3. The diameters of the countersunk hole and the third hole are larger than the diameter of the flap hole, which ensures that the ablation marks on the edge of the flap hole will not contact the sealing surface of the first or second plate during the flap's movement, thus guaranteeing the sealing pressure resistance between the flap and the first or second plate. In addition, when the flap is in contact with the first plate, it can form a tight corner with the edge of the first hole and the countersunk hole, allowing the flap to withstand a greater pressure difference to ensure that the fluid does not flow back from the second plate to the first plate, enabling the one-way diaphragm valve to withstand a greater pressure difference.

[0020] In summary, the flaps of the diaphragm valve in this application can fit the valve plate very well, greatly improving the valve's pressure-bearing capacity and avoiding air leakage problems, thus having value for widespread application. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 is a schematic diagram of the structure of the present invention;

[0023] Figure 2 is a partial structural schematic diagram of the petal 3 and the first plate 1 in this invention.

[0024] Figure 3 is an enlarged view of part A in Figure 2;

[0025] Figure 4 is a partial structural schematic diagram of the flap 3 and the second plate 2 in this invention;

[0026] Figure 5 is a partial structural schematic diagram of the first plate 1 with a soft coating 13 on the side of the countersunk hole 12 in this invention.

[0027] Figure 6 is a schematic diagram of another embodiment of the partition plate 4 in this invention;

[0028] Figure 7 is a schematic diagram of another embodiment of the partition 4 in this invention.

[0029] Explanation of reference numerals in the attached drawings: 1. First plate; 11. First hole; 12. Countersunk hole; 13. Soft coating; 2. Second plate; 21. Second hole; 22. Third hole; 3. Lobe; 31. Lobe hole; 32. Corner; 4. Spare plate; 41. Valve movement space; 42. Dotted spacer; 421. Ribs; 43. Strip spacer. Embodiments of the present invention

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0031] In view of the problems existing in the prior art, the present invention provides a diaphragm valve with a countersunk hole. The present invention will be described in detail below with reference to the accompanying drawings.

[0032] Referring to Figures 1-7, the technical solution adopted in this specific embodiment is: a diaphragm valve with countersunk holes, which can be used at high frequencies. The diaphragm 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 parallel vertically, not limited to the first plate 1 being on top or the second plate 2 being on top. Multiple evenly distributed first holes 11 are vertically penetrated through the first plate 1. Multiple non-penetrating countersunk holes 12 are formed on the side of the first plate 1 facing the second plate 2. The multiple first holes 11 and multiple countersunk holes 12 are evenly staggered. A second hole 21 is vertically penetrated through the second plate 2 at a position opposite to the first hole 11, and a third hole 22 is vertically penetrated through the second plate 2 at a position opposite to the countersunk hole 12. A flap 3 is disposed between the first plate 1 and the second plate 2 and can move up and down. Multiple flap holes 31 are formed through the flap 3. A countersunk hole 12 on the first plate 1 is formed on the contact surface with the flap 3. The multiple flap holes 31 and countersunk holes 12 are arranged one-to-one, and the flap holes 31 are located at the corresponding position to the third hole 22, 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 direction of the fluid pressure difference. A spacer plate 4 is disposed between the first plate 1 and the second plate 2, and a valve movement space 41 for the flap 3 to move up and down is formed through the spacer plate 4. The size of the valve movement space 41 is preferably set at 30μm-50μm. When the flap 3 is pressed tightly against the second plate 2 under pressure, the first hole 11, the flap holes 31, and the third hole 22 form a channel that facilitates fluid flow.

[0033] The spacer 4 can be disposed between the petal 3 and the first plate 1 or between the petal 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 adhesive marks on the valve hole 31. The depth of the countersunk hole 12 is between 10μ and 50μ, and the diameter of the countersunk hole 12 is greater than the diameter of the valve hole 31. At this time, under the action of pressure difference, when the pressure on the first plate 1 surface is greater than the pressure on the second plate 2 surface, the valve 3 moves to be close to the second plate 2 surface, and the fluid can flow towards the second plate 2 surface through the first hole 11, the valve hole 31, the valve movement space 41, and the third hole 22. When the pressure on the first plate 1 surface is less than that on the second plate 2 surface, the valve 3 moves to be close to the first plate 1 surface under pressure. The valve 3 forms a close corner 32 with the edge of the first hole 11 and the edge of the countersunk hole 12, respectively, so that the valve 3 can withstand a greater pressure difference to ensure that the fluid does not flow from the second plate 2 back to the first plate 1 surface. In this way, the unidirectional flow of the diaphragm valve can be realized, and it can withstand a greater pressure difference.

[0036] Furthermore, in order to improve the machining burrs on the edges of the first hole 11 and the countersunk hole 12, and to improve the sealing performance between the first plate 1 and the flap 3, a soft coating 13 can be applied to the side of the first plate 1 where the countersunk hole 12 is located. This soft coating 13 can improve the wear resistance of the flap 3 during movement, increase its service life, and improve the sealing performance between the plate and the flap 3.

[0037] Preferably, the material of the soft coating 13 can be silicon-based, fluoride, or phenelzine, and its thickness can be between 1 μm and 20 μm.

[0038] Furthermore, the aforementioned soft coating 13 can also be added to the surface of the second plate 2 facing the petal 3 to improve the lifespan of the petal 3.

[0039] Furthermore, a coating similar to the soft coating 13 can be added to the surfaces of the first plate 1 and the second plate 2 that are not involved in motion friction, thereby improving the difficulty of single-sided processing during the manufacturing process.

[0040] Furthermore, the material of the flap 3 is preferably PI material. To meet the requirements of high-frequency operation, the mass of the flap 3 should be as small as possible, and the thickness of the flap 3 should be less than 10 μm, preferably less than 5 μm. In addition, the aperture of the flap hole 31 is set between 0.1 μm and 0.6 μm, and the hole can be opened by laser ablation. The ablation residue should be controlled to be less than 5 μm, preferably less than 2 μm.

[0041] Preferably, the diameter of the flap hole 31 is smaller than the diameter of the countersunk hole 12 and the third hole 22. This ensures that during movement, the ablation marks on the edge of the flap hole 31 will not contact the sealing surface of the first plate 1 or the second plate 2, thus guaranteeing the sealing pressure resistance between the flap 3 and the first plate 1 or the second plate 2. When the flap 3 moves under pressure to the surface that is in close contact with the second plate 2, the flap 3 also forms a corner 32 with the edge of the second hole 21 and the third hole 22 on the second plate 2.

[0042] Furthermore, the spacer plate 4 is provided with a support structure in the flap movement space 41 to support the space between the first plate 1 and the second plate 2 from being compressed, so as to prevent the first plate 1 and the second plate 2 from collapsing and sticking together, thus losing the movement space of the flap 3.

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

[0044] Alternatively, the supporting structure may be a strip-shaped isolation sheet 43 disposed in the flap movement space 41, the end of which is connected to the main frame of the spacer plate 4, dividing the flap movement space 41 into multiple sections. Here, the strip-shaped isolation sheet 43 is not limited to an "I" shape or a "+" shape structure, and may divide the flap movement space 41 into two or four sections.

[0045] Alternatively, the supporting structure may include dot-shaped isolation plates 42 and ribs 421. The dot-shaped isolation plates 42 are positioned at the very center of the flap movement space 41, forming an annular space. The opposite ends of the dot-shaped isolation plates 42 are connected to the main frame of the spacer plate 4 via ribs 421, dividing the flap movement space 41 into multiple sections. One or two pairs of ribs 421 may be provided.

[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, etc.

[0047] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0048] The above description is only used to illustrate the technical solution of the present invention and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention, as long as they do not depart from the spirit and scope of the technical solution of the present invention, should be covered within the scope of the claims of the present invention.

Claims

1. A diaphragm valve with a countersunk hole, characterized in that, include: The first plate has multiple first holes through it, and multiple countersunk holes are also provided in the first plate. The second plate has a second hole through it at a position relative to the first hole, and a third hole through it at a position relative to the countersunk hole. The flap is disposed between the first plate and the second plate, and the flap is located at the opposite position of the countersunk hole and has a flap hole through it. The flap is driven between the first plate and the second plate according to the change of the pressure difference direction of the fluid. A septum is disposed between a first plate and a second plate, and a valve movement space for the valve flaps to move up and down is formed through the septum. The septum is provided with a support structure in the valve movement space to prevent the space between the first plate and the second plate from being compressed.

2. The diaphragm valve with countersunk hole according to claim 1, characterized in that, The diameters of both the countersunk hole and the third hole are larger than the diameter of the flap hole.

3. The diaphragm valve with countersunk hole 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 diaphragm valve with countersunk hole according to claim 1, characterized in that, A soft coating is applied to the surface of the first plate where countersunk holes are formed.

5. The diaphragm valve with countersunk hole according to claim 1, characterized in that, The side of the second plate facing the petals is coated with a soft coating.

6. The diaphragm valve with countersunk hole 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 pyrene coating.

7. The diaphragm valve with countersunk hole 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 diaphragm valve with countersunk hole according to claim 1, characterized in that, The valve is a PI valve with a thickness of less than 10 μm.

9. The diaphragm valve with countersunk hole according to claim 1, characterized in that, When the petal moves under pressure to press against the first plate, the petal forms an angle with the edge of the first hole and the edge of the countersunk hole, respectively.

10. The diaphragm valve with countersunk hole according to claim 1, characterized in that, The supporting structure is a dotted isolation sheet located at the center of the flap movement space, and the dotted isolation sheet is separate from the main frame of the spacer plate; Alternatively, the supporting structure may be a strip-shaped isolation sheet set in the flap movement space, with the end of the strip-shaped isolation sheet connected to the main frame of the spacer plate, thereby dividing the flap movement space into multiple sections. Alternatively, the supporting structure may include dot-shaped isolation plates and ribs. The dot-shaped isolation plates are located at the center of the flap movement space, and their opposite ends are connected to the main frame of the spacer plate through the ribs, thereby dividing the flap movement space into multiple sections.

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