Leak valve with modular spool

Abstract

This invention relates to a leak valve with a modular valve core, comprising a valve seat and a modular valve core. The valve seat has a first valve chamber, a third valve chamber, and a second valve chamber that are sequentially connected and whose openings all face a first direction. The third valve chamber has a vent hole, and the second valve chamber has a vent hole. The modular valve core is mounted on the valve seat and covers the openings of the first, third, and second valve chambers. The modular valve core includes a first pressure plate, a membrane structure, and a second pressure plate that are sequentially stacked together from the side closest to the opening to the side furthest from the opening to form an integral structure. The first pressure plate has a first opening corresponding to the first valve chamber and a second opening corresponding to the second valve chamber. The second pressure plate has a first flange corresponding to the first opening and protruding in a second direction opposite to the first direction, and a second air inlet facing the second opening. The first flange has a first air inlet. The membrane structure includes a diaphragm and a valve plate. This invention allows for quality control of the intermediate valve, which is a key functional unit, during the manufacturing process.

Description

Technical Field

[0001] This invention relates to the field of fluid control technology, and in particular to a leak valve with a modular valve core. Background Technology

[0002] Leakage valves are typically used in conjunction with miniature air pumps to form rapid inflation / deflation modules, widely applicable to smart wearable devices such as wrist blood pressure monitors, smartwatches, and smart bracelets. Improving the performance of the pump and valve is a key factor in enhancing product performance. To achieve miniaturization, leakage valves used in smart wearable devices often employ a diaphragm structure to divide the valve chamber into an inlet and an outlet side. The inflation / deflation process is achieved by controlling the pressure on the inlet and outlet sides. The intermediate valve (one-way valve), formed by the diaphragm structure and valve body, is the main functional unit of the leakage valve. Its forward opening and reverse shut-off performance are key indicators for evaluating the performance of the leakage valve. However, existing leakage valve products have loose structures and lack independent modular valve core structures. Performance testing can only be performed after the entire leakage valve is assembled. The lack of quality control over the intermediate valve, a key functional unit, during the manufacturing process makes it difficult to further reduce the scrap rate and results in significant resource waste. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: in order to solve the problem that existing air leakage valve products, due to their loose structure, lack quality control of the intermediate valve as the main functional unit in the manufacturing process, making it difficult to further reduce the scrap rate in the production process and causing high resource waste, an air leakage valve with a modular valve core is provided.

[0004] To solve the above-mentioned technical problems, the technical solution of the present invention is: a leakage valve with a modular valve core, comprising a valve seat and a modular valve core, wherein the valve seat has a first valve chamber, a third valve chamber, and a second valve chamber that are sequentially connected and whose openings all face a first direction; the third valve chamber has a vent hole, and the second valve chamber has a vent hole; the modular valve core is installed on the valve seat and covers the openings of the first valve chamber, the third valve chamber, and the second valve chamber; wherein,

[0005] The modular valve core includes a first pressure plate, a membrane structure, and a second pressure plate that are stacked together in sequence from the side closest to the opening to the side furthest from the opening to form an integral structure. The first pressure plate has a first opening corresponding to the first valve chamber and a second opening corresponding to the second valve chamber. The second pressure plate has a first flange corresponding to the first opening and protruding in a second direction opposite to the first direction and a second air inlet facing the second opening. The first flange has a through first air inlet.

[0006] The membrane structure includes a diaphragm and a valve plate. The diaphragm is used to block the vent hole when air is introduced through the second air inlet and to open the vent hole when air is introduced through the vent hole in the reverse direction. The valve plate is used to elastically deform to form a valve channel connecting the first air inlet and the first valve chamber when air is introduced through the first air inlet and to reset to block the first air inlet when no air is introduced through the first air inlet.

[0007] To further improve the fit and sealing between the valve plate and the first air inlet, a second flange protruding in the first direction is provided at the middle position of the first flange, and the first air inlet passes through the second flange. The first flange and the second flange have a rounded transition.

[0008] The valve plate is used to press against the rounded transition area between the first flange and the second flange to block the first air inlet when no air is entering the first air inlet.

[0009] Furthermore, to facilitate the installation of the modular valve core on the valve seat, a portion of the valve seat is recessed in the second direction to form a receiving groove, and a portion of the bottom surface of the receiving groove is recessed in the second direction to form the first valve chamber, the third valve chamber, and the second valve chamber. The first pressure plate is sealed and fitted to at least a portion of the bottom surface of the receiving groove that is not recessed in the second direction.

[0010] Furthermore, to facilitate the fit between the diaphragm and the vent, the second valve chamber is provided with a protrusion that protrudes in the first direction, and the vent passes through the protrusion.

[0011] Furthermore, the valve seat protrudes in a second direction from the position opposite the third valve chamber to form an air nozzle, and the vent hole penetrates the air nozzle.

[0012] Furthermore, the diaphragm includes an interconnected joint and a deformable portion. The joint is clamped between the first pressure plate and the second pressure plate, and the deformable portion faces the vent hole to block or open the vent hole.

[0013] Furthermore, the valve plate includes a first connecting part, a second connecting part, and a valve plate body. The first connecting part is clamped between the first pressure plate and the second pressure plate. The valve plate body is connected to the first connecting part through the second connecting part and faces the first air inlet, and is used to open or block the first air inlet. The second connecting part is provided with at least one through hole.

[0014] Furthermore, both the first opening and the first valve chamber cover the first flange, the valve plate body, and the second connecting portion.

[0015] Furthermore, there is a gap between the valve plate body and the bottom surface of the first valve chamber.

[0016] Furthermore, the diaphragm and the valve plate are integrally formed or separately disposed.

[0017] By adopting the above technical solution, the present invention has the following beneficial effects:

[0018] 1. The intermediate valve of the leak valve is formed as an independent modular valve core. It can test and inspect the forward opening performance and reverse shut-off performance, which are key evaluation indicators of the leak valve performance, without assembling it into a complete leak valve product. The quality of the final product can be controlled in the intermediate process, which helps to further reduce the scrap rate and avoid the waste of raw materials and labor resources caused by the subsequent production process based on scrap.

[0019] 2. The first air inlet is located at or near the center of the second flange. The valve body of the valve plate abuts against the rounded transition area between the first flange and the second flange. That is, the edge of the first air inlet does not directly contact the valve body. This avoids the dimensional deviation of the first air inlet during the processing or the burrs formed on the edge of the inlet during the processing affecting the fitting accuracy and sealing between the valve body and the first air inlet, thereby improving the reverse shut-off performance of the valve plate and preventing the leakage valve from failing. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the valve seat structure in an embodiment of the present invention;

[0021] Figure 2 This is a structural schematic diagram of the valve seat from another perspective in an embodiment of the present invention;

[0022] Figure 3 This is a cross-sectional schematic diagram of the first flange, which is generally conical in shape, in an embodiment of the present invention;

[0023] Figure 4 This is a cross-sectional schematic diagram of the first flange, which is cylindrical in shape, in an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram showing the modular valve core in an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the stacked assembly of the modular valve core in an embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of the structure of a leak valve with a modular valve core in an embodiment of the present invention;

[0027] Figure 8 This is a schematic diagram of the inflation process of a leak valve with a modular valve core in an embodiment of the present invention.

[0028] Figure 9 This is a schematic diagram of the venting process of a venting valve with a modular valve core in an embodiment of the present invention. Detailed Implementation

[0029] The invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention in a schematic manner. Therefore, they only show the components relevant to the invention, and the orientations and references (e.g., up, down, left, right, etc.) are only used to aid in the description of the features in the drawings. Therefore, the following specific embodiments are not intended to be limiting, and the scope of the claimed subject matter is defined solely by the appended claims and their equivalents.

[0030] like Figures 1-9 As shown, a leakage valve with a modular valve core includes a valve seat 1 and a modular valve core; wherein,

[0031] The valve seat 1 is provided with a first valve chamber 11, a third valve chamber 13 and a second valve chamber 12 connected in sequence and with their openings facing the first direction. The third valve chamber 13 is provided with a vent hole 131 and the second valve chamber 12 is provided with a vent hole 121.

[0032] The modular valve core is installed on the valve seat 1 and covers the openings of the first valve chamber 11, the third valve chamber 13 and the second valve chamber 12. The modular valve core includes a first pressure plate 2, a membrane structure 3 and a second pressure plate 4 that are stacked together in sequence from the side closest to the opening to the side furthest from the opening to form an integral structure.

[0033] The first pressure plate 2 is provided with a first opening 21 corresponding to the first valve chamber 11 and a second opening 22 corresponding to the second valve chamber 12; the second pressure plate 4 is provided with a first flange 41 corresponding to the first opening 21 and protruding in a second direction opposite to the first direction and a second air inlet 42 facing the second opening 22, and the first flange 41 is provided with a through first air inlet 43.

[0034] The membrane structure 3 includes a diaphragm 31 and a valve plate 32. The diaphragm 31 is used to block the vent hole 121 when air is introduced through the second air inlet 42 and to open the vent hole 121 when air is introduced through the vent hole 131 in reverse. The valve plate 32 is used to undergo elastic deformation when air is introduced through the first air inlet 43 to form a valve channel connecting the first air inlet 43 and the first valve chamber 11, and to reset to block the first air inlet 43 when no air is introduced through the first air inlet 43.

[0035] To better understand the air leakage valve with modular valve core in this embodiment, it will be further explained and described below. The definitions of the first direction and the second direction include, but are not limited to, the first direction being downward and the second direction being upward.

[0036] like Figures 1-9As shown, a leak valve with a modular valve core includes a valve seat 1 and a modular valve core fixedly connected to the valve seat 1:

[0037] Valve seat 1 has a portion of its lower surface recessed upwards to form a receiving groove 14. A portion of the bottom surface of the receiving groove 14 is recessed upwards to form a first valve chamber 11, a second valve chamber 12, and a third valve chamber 13 connecting the first valve chamber 11 and the second valve chamber 12. The upper surface of valve seat 1 protrudes upwards to form a nozzle 15. A through vent hole 131 is provided on the nozzle 15, which communicates with the third valve chamber 13. A vent hole 121 is provided at or near the center of the second valve chamber 12, and it also has a downward protruding part 122. The vent hole 121 passes through the protruding part 122 and communicates with the second valve chamber 12.

[0038] The cross-sectional shape of the protrusion 122 can be annular or polygonal, etc., and both the inner and outer contour lines of the cross-section are closed structures. No limitation is imposed here. In this embodiment, the cross-sectional shape of the protrusion 122 is annular, and the protrusion 122 is cylindrical in shape. The vent 121 is located at the center of the protrusion 122. Figures 1-2 As shown.

[0039] The modular valve core includes a first pressure plate 2, a membrane structure 3, and a second pressure plate 4 stacked together to form an integral structure. The first pressure plate 2 and the second pressure plate 4 are pressed against the upper and lower sides of the membrane structure 3 in opposite directions. The modular valve core is installed in the receiving groove 14. The upper surface of the first pressure plate 2 of the modular valve core is attached to the bottom surface of the receiving groove 14 of the valve seat 1 and forms a sealed and fixed connection.

[0040] The first pressure plate 2 has a first opening 21 relative to the first valve chamber 11, a second opening 22 relative to the second valve chamber 12, and a third opening 23 connecting the first opening 21 and the second opening 22 relative to the third valve chamber 13. The second pressure plate 4 protrudes upward from the center or near the center of the area of ​​the first opening 21 to form a first flange 41, and protrudes downward from the top center or near the center of the first flange 41 to form a second flange 44. That is, the protrusion directions of the first flange 41 and the second flange 44 are opposite, and there is a rounded transition between the rising edges of the first flange 41 and the rising edges of the second flange 44. A first air inlet 43 penetrating the second pressure plate 4 is provided at or near the center of the second flange 44.

[0041] The first flange 41 can have various shapes, such as trapezoidal or conical. Figure 3 As shown, it may be cylindrical, such as Figure 4 As shown, no restrictions are imposed here.

[0042] Meanwhile, the second pressure plate 4 is provided with a second air inlet 42 directly opposite the second opening 22.

[0043] The membrane structure 3 includes a diaphragm 31 and a valve plate 32. The diaphragm 31 includes a joint portion 311 and a deformable portion 312 that are connected to each other. The diaphragm 31 is fixedly connected to the first pressure plate 2 and the second pressure plate 4 through its joint portion 311. The deformable portion 312 faces the vent hole 121 and is used to block the vent hole 121 when air is introduced through the second air inlet 42, and to open the vent hole 121 when gas is introduced into the third valve chamber 13 through the vent hole 131. The protrusion 122 shortens the distance between the vent hole 121 and the deformable portion 312 of the diaphragm 31, which can facilitate the cooperation between the deformable portion 312 and the vent hole 121 to a certain extent. When inflating, the deformable portion 312 of the diaphragm 31 does not need to deform too much to block the vent hole 121.

[0044] The valve plate 32 includes a first connecting part 321, a second connecting part 322, and a valve plate body 323. The valve plate 32 is fixedly connected to the first pressure plate 2 and the second pressure plate 4 through its first connecting part 321. The valve plate body 323 is connected to the first connecting part 321 through the second connecting part 322. The second connecting part 322 is provided with at least one through hole 324. The cross-sectional shape of the hole 324 can be circular, rectangular, polygonal, etc., and is not limited here.

[0045] The valve plate body 323 abuts against the rounded transition area between the first flange 41 and the second flange 44, and covers the first air inlet 43. The valve plate 32 elastically deforms towards the first valve chamber 11 due to the valve plate body 323 abutting against the rounded transition area. The valve plate 32 is used to further elastically deform to form a valve passage connecting the first air inlet 43 and the first valve chamber 11 when air is introduced through the first air inlet 43, and to slightly reset to block the first air inlet 43 when no air is introduced through it. In the initial state, the valve plate body 323 covers the first air inlet 43, and the first air inlet 43 is not connected to the first valve chamber 11.

[0046] The diaphragm 31 and the valve plate 32 can be integrally formed or separately disposed. In this embodiment, the diaphragm 31 and the valve plate 32 are integrally formed to form the membrane structure 3, which helps to reduce the difficulty of the process and reduce the manufacturing cost. The membrane structure 3 is an elastomer membrane, such as a silicone membrane, rubber membrane, TPU membrane or other elastomer membrane, which is not limited here, so that the deformable part 312, the second connecting part 322 and the valve plate body 323 can generate elastic deformation under the action of pressure difference.

[0047] The materials of the first pressure plate 2 and the second pressure plate 4 can be polymer films, metal films, or composite films composed of polymers and metals, and there are no restrictions on them.

[0048] The first opening 21 covers the first flange 41 and the valve plate body 323 and the second connecting portion 322 that abut against the rounded transition area, to prevent deformation of the first flange 41 and the valve plate 32 toward the first valve chamber 11. Simultaneously, the first valve chamber 11 covers the first flange 41 and the valve plate body 323 and the second connecting portion 322 that abut against the rounded transition area, to prevent deformation of the first flange 41 and the valve plate 32 toward the first valve chamber 11. It should be noted that, initially, there is a gap between the valve plate body 323 and the bottom surface of the first valve chamber 11; such as... Figures 5-7 As shown.

[0049] Specifically, the intermediate valve of the leak valve is formed as an independent modular valve core. This allows for the testing and inspection of the forward opening and reverse shut-off performance, key performance indicators of the leak valve, without requiring assembly into a complete leak valve product. Controlling the final product quality during the intermediate process helps further reduce the scrap rate and avoids waste of raw materials and labor resources in subsequent production processes based on scrap. In this embodiment, the first air inlet 43 is located at or near the center of the second flange 44. The valve body 323 of the valve plate 32 abuts against the rounded transition area between the first flange 41 and the second flange 44. That is, the edge of the first air inlet 43 does not directly contact the valve body 323. This avoids dimensional deviations in the first air inlet 43 during processing or burrs formed on the edge of the orifice during processing affecting the fitting accuracy and sealing between the valve body 323 and the first air inlet 43, thereby improving the reverse shut-off performance of the valve plate 32 and preventing leak valve failure.

[0050] Based on the above structure, the working process of the leakage valve with modular valve core in this embodiment is as follows:

[0051] During inflation, pressurized gas flows through the second air inlet 42, causing the deformable portion 312 of the diaphragm 31 to deform towards the vent 121. Simultaneously, gas at the same pressure flows through the first air inlet 43, lifting the valve plate body 323 of the valve plate 32. The valve plate 32 undergoes elastic deformation, creating a gap between the valve plate body 323 and the rounded transition area, forming a valve passage connecting the first air inlet 43 and the first valve chamber 11. After the pressurized gas flows through the first air inlet 43 and the valve passage, it enters the first valve chamber 11. This process generates a pressure drop, meaning the gas pressure inside the first valve chamber 11 is less than the gas pressure flowing through the first air inlet 43. The pressure difference is such that, since the first valve chamber 11 and the second valve chamber 12 are connected via the third valve chamber 13, the pressure in the second valve chamber 12 is less than the pressure of the gas flowing through the second air inlet 42. Under this pressure difference, the deformable portion 312 of the diaphragm 31 overcomes its own elastic deformation resistance and continues to deform elastically towards the vent 121, quickly pressing against the opposite protrusion 122 and blocking the vent 121. Because the vent 121 is blocked, gas with a certain pressure can only flow into the first valve chamber 11 through the first air inlet 43, and then flow out through the third valve chamber 13 and the vent 131 into the external gas storage device. Figure 8 As shown.

[0052] During venting, the first air inlet 43 and the second air inlet 42 stop intake, reducing pressure. Gas with a certain pressure stored in the external gas storage device flows into the third valve chamber 13 through the vent 131, and then into the first valve chamber 11 and the second valve chamber 12 connected to the third valve chamber 13. Under the combined action of the valve plate 32's own deformation recovery force and the pressure difference on both sides of the valve plate 32, the valve plate body 323 quickly presses against the arc transition zone, blocking the first air inlet 43 and obstructing the path of gas in the first valve chamber 11 out through the first air inlet 43. Simultaneously, the deformable part 312 of the diaphragm 31 blocking the vent quickly recovers its deformation under the combined action of its own deformation recovery force and the pressure difference on both sides, releasing the blockage of the vent 121. At this time, the pressurized gas flowing into the third valve chamber 13 from the external gas storage device through the vent 131 can only flow out through the vent 121, completing the venting process. Figure 9 As shown.

[0053] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A leakage valve with a modular valve core, characterized in that, include: The valve seat (1) is provided with a first valve chamber (11), a third valve chamber (13) and a second valve chamber (12) connected in sequence and with their openings facing the first direction. The third valve chamber (13) is provided with a vent hole (131) and the second valve chamber (12) is provided with a vent hole (121). A modular valve core is installed on the valve seat (1) and covers the openings of the first valve chamber (11), the third valve chamber (13), and the second valve chamber (12). The modular valve core includes a first pressure plate (2), a membrane structure (3), and a second pressure plate (4) that are stacked sequentially from the side closest to the opening to the side furthest from the opening to form an integral structure. The first pressure plate (2) is provided with a first opening (21) corresponding to the first valve chamber (11) and a second opening (22) corresponding to the second valve chamber (12); the second pressure plate (4) is provided with a first flange (41) corresponding to the first opening (21) and protruding in a second direction opposite to the first direction and a second air inlet (42) facing the second opening (22), and the first flange (41) is provided with a through first air inlet (43). The membrane structure (3) includes a diaphragm (31) and a valve plate (32). The diaphragm (31) is used to block the vent (121) when air is introduced through the second air inlet (42) and to open the vent (121) when air is introduced through the vent (131) in reverse. The valve plate (32) is used to undergo elastic deformation to form a valve channel connecting the first air inlet (43) and the first valve chamber (11) when air is introduced through the first air inlet (43) and to reset to block the first air inlet (43) when no air is introduced through the first air inlet (43). The valve plate (32) includes a first connecting part (321), a second connecting part (322) and a valve plate body (323). The first connecting part (321) is clamped between the first pressure plate (2) and the second pressure plate (4). The valve plate body (323) is connected to the first connecting part (321) through the second connecting part (322) and faces the first air inlet (43) for opening or blocking the first air inlet (43). The second connecting part (322) is provided with at least one through hole (324).

2. The leak valve with a modular valve core according to claim 1, characterized in that, The first flange (41) has a second flange (44) protruding in a first direction at its middle position, and the first air inlet (43) passes through the second flange (44). The first flange (41) and the second flange (44) have a rounded transition. The valve plate (32) is used to press against the rounded transition area between the first flange (41) and the second flange (44) to block the first air inlet (43) when no air is entering the first air inlet (43).

3. The leakage valve with a modular valve core according to claim 1, characterized in that, A portion of the surface of the valve seat (1) is recessed toward the second direction to form a receiving groove (14), and a portion of the bottom surface of the receiving groove (14) is recessed toward the second direction to form the first valve chamber (11), the third valve chamber (13), and the second valve chamber (12). The first pressure plate (2) is sealed and fitted to at least a portion of the bottom surface of the receiving groove (14) that is not recessed toward the second direction.

4. The leak valve with a modular valve core according to claim 1, characterized in that, The second valve chamber (12) is provided with a protrusion (122) protruding in the first direction, and the vent (121) passes through the protrusion (122).

5. The leakage valve with a modular valve core according to claim 1, characterized in that, The valve seat (1) protrudes in the second direction from the position opposite the third valve chamber (13) to form an air nozzle (15), and the vent (131) passes through the air nozzle (15).

6. The leakage valve with a modular valve core according to claim 1, characterized in that, The diaphragm (31) includes a joint (311) and a deformable part (312) connected to each other. The joint (311) is clamped between the first pressure plate (2) and the second pressure plate (4). The deformable part (312) is facing the vent (121) and is used to block or open the vent (121).

7. The leak valve with a modular valve core according to claim 1, characterized in that, The first opening (21) and the first valve chamber (11) both cover the first flange (41), the valve plate body (323) and the second connecting part (322).

8. The leak valve with a modular valve core according to claim 7, characterized in that, There is a gap between the valve plate body (323) and the bottom surface of the first valve chamber (11).

9. The leakage valve with a modular valve core according to claim 1, characterized in that, The diaphragm (31) and the valve plate (32) are integrally formed or separately disposed.

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