Blow-by valve for reducing noise and fatigue damage

Abstract

The present application relates to the technical field of fluid control, and particularly relates to a leakage valve capable of reducing noise and fatigue damage, comprising a diaphragm structure and a valve shell with an inner cavity, the diaphragm structure comprising a diaphragm and an intermediate valve piece; the diaphragm is arranged in the inner cavity and forms a first valve cavity isolated from a second air hole with the gas outlet side of the inner cavity, and the intermediate valve piece is used to elastically deform to form a valve channel connecting the first air hole and the first valve cavity when the first air hole is connected to the gas; the present application can effectively limit the maximum moving distance of the valve piece body through the limiting boss, and make the valve piece body mainly subjected to the action of one-side gas pressure during the inflation process, thereby avoiding the forced flutter of the intermediate valve piece caused by the fluctuation of the pressure difference between the two sides of the intermediate valve piece when the two sides of the valve piece body are simultaneously subjected to the action of the gas pressure, and the generation of noise and fatigue damage, and simultaneously limiting the maximum deformation amount of the connecting part, further reducing the risk of fatigue damage and even failure of the intermediate valve piece during the working process, and prolonging the service life of the leakage valve.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of fluid control technology, and particularly relates to a leakage valve capable of reducing noise and fatigue damage. BACKGROUND

[0002] The advent of smart wearable devices such as wrist blood pressure meters, smart watches and smart bracelets has greatly facilitated people's life, and thus has been favored by the market. As core components of the smart wearable devices, micro air pumps and leakage valves have also been widely concerned by the industry. Improving the performance of the micro air pumps and the leakage valves has become a key factor for improving the performance of the products. In order to realize miniaturization in structure, the leakage valves applied in the smart wearable devices are mostly divided into air inlet sides and air outlet sides by diaphragm structures, for example, the leakage valve, the integrated air pump and the electronic blood pressure meter disclosed in the application with the publication number CN103767695A, the air valve, the integrated air pump and the wearable electronic blood pressure meter disclosed in the application with the publication number CN104825145A, and the valve and the fluid control device disclosed in the application with the publication number CN107091220A. In the above three applications, the cavities are formed by valve shells and diaphragms.

[0003] During the inflation and deflation processes, the air with certain pressure and flow rate flowing through the valve cavity will impact the diaphragm and the one-way valve structure, causing forced vibration of the diaphragm and the valve disc. When the vibration frequency reaches 20Hz-20KHz, obvious noise will be generated. With the increase of the frequency, the tone becomes more and more sharp and piercing. Such noise greatly affects the user experience. Meanwhile, during the opening process of the one-way valve, the valve disc lacks a limit. On the one hand, this will cause the valve disc to vibrate at a certain frequency due to the pressure fluctuation of the air when the valve disc is opened under the action of the pressure difference of the air on both sides. When the vibration frequency reaches the audible frequency range, noise will be generated. On the other hand, when the pressure difference of the air on both sides of the valve disc increases, the opening degree of the valve disc increases. The deformation amount of the elastic support connected with the valve disc increases, accelerating the fatigue damage of the elastic support. When the pressure difference further increases, the elastic support will even produce plastic deformation, causing failure of the one-way valve structure, and thus causing the leakage valve to be unable to continue to work normally. Therefore, the leakage valve structure lacking the limit of the valve disc has a narrow adjustment range of the inflation pressure and flow rate, and also greatly reduces the service life of the leakage valve. SUMMARY

[0004] The technical problem to be solved by the present application is that the valve disc of the leakage valve in the prior art easily produces noise and accelerates the fatigue damage of the elastic support when the valve disc is opened under the action of the pressure difference of the air on both sides, and thus the present application provides a leakage valve capable of reducing noise and fatigue damage.

[0005] The technical scheme adopted by the present application to solve its technical problems is: a leakage valve capable of reducing noise and fatigue damage, comprising a diaphragm structure and a valve housing with an inner cavity, the inner cavity has a leakage hole and an outlet hole on the outlet side, and at least one first gas hole and at least one second gas hole on the inlet side opposite to the outlet side, the diaphragm structure comprises a diaphragm and an intermediate valve piece;

[0006] The diaphragm is arranged in the inner cavity and forms a first valve cavity isolated from the second gas hole between the diaphragm and the outlet side of the inner cavity, the leakage hole and the outlet hole are both communicated with the first valve cavity, the diaphragm is used to block the leakage hole when the second gas hole is supplied with gas, and is used to open the leakage hole when the outlet hole is supplied with gas;

[0007] The intermediate valve piece is used to elastically deform to form a valve channel communicating the first gas hole and the first valve cavity when the first gas hole is supplied with gas, and is used to reset and be pressed against the side wall of the inlet side of the inner cavity to block the first gas hole when the outlet hole is supplied with gas;

[0008] The outlet side of the inner cavity is protruded towards the inlet side and has a limiting boss arranged opposite to the intermediate valve piece.

[0009] Further, the intermediate valve piece comprises a connecting part and a valve piece body connected with each other, the connecting part is fixedly connected with the side wall of the inlet side of the inner cavity, and the valve piece body is arranged opposite to the limiting boss and is used to open or block the first gas hole.

[0010] Further, the connecting part comprises a first connecting part and a second connecting part, the first connecting part is fixedly connected with the side wall of the inlet side of the inner cavity, the valve piece body is connected with the first connecting part through the second connecting part, and at least one hole part a or groove part b is penetrated through the second connecting part.

[0011] Further, the inlet side of the inner cavity has a second protruding part protruding towards the outlet side, the first gas hole is penetrated through the second protruding part, the valve piece body abuts against the second protruding part and covers the first gas hole, and the intermediate valve piece elastically deforms towards the side where the limiting boss is located due to the valve piece body abutting against the second protruding part.

[0012] Further, the diaphragm comprises a joint part and a deformation part connected with each other, the joint part is fixedly connected with the side wall of the inlet side of the inner cavity, and the deformation part is arranged opposite to the leakage hole and is used to open or block the leakage hole;

[0013] The gap between the deformation part and the side wall of the inlet side of the inner cavity is left to form a second valve cavity, the height of the gap is h, 0

[0014] The deformation part of the diaphragm is arranged opposite the air vent hole and covers the second valve cavity, and the deformation part abuts or is close to the air inlet side side wall of the inner cavity opposite thereto; during the air release process, the pressure airflow flows into the first valve cavity through the air outlet hole, at this time, the gas pressure in the first valve cavity is greater than the gas pressure in the second valve cavity, and the deformation part is quickly pressed against the air inlet side side wall of the inner cavity opposite thereto under the action of the deformation restoring force of the deformation part and the gas pressure difference on both sides, so that the impact energy of the pressure airflow on the deformation part can be quickly attenuated, the flutter of the deformation part can be greatly weakened or even inhibited, and noise generated by the air leakage valve during the air release process can be effectively avoided.

[0015] Further, the air outlet side of the inner cavity has a first protruding part protruding towards the air inlet side, and the air vent hole penetrates the first protruding part.

[0016] Further, the second valve cavity has a protruding part protruding towards the side where the air vent hole is located, and the deformation part abuts against the protruding part, and the diaphragm is elastically deformed towards the side where the air vent hole is located due to the abutment of the deformation part against the protruding part.

[0017] That is, in the initial state, the deformation part has a certain tension, and during the air release process, the pressure airflow flows into the first valve cavity through the air outlet hole, at this time, the gas pressure in the first valve cavity is greater than the gas pressure in the second valve cavity, and the deformation part is quickly pressed against the protruding part under the action of the deformation restoring force of the deformation part and the gas pressure difference on both sides, so that the impact energy of the pressure airflow on the deformation part can be quickly attenuated, the flutter of the deformation part can be greatly weakened or even inhibited, and noise generated by the air leakage valve during the air release process can be effectively avoided.

[0018] Further, the diaphragm and the intermediate valve piece are integrally formed or separately arranged.

[0019] Further, the valve housing is arranged with a cover plate, at least one air outlet flow channel and at least one air release flow channel are formed between the cover plate and the valve housing, and at least one second air outlet hole and at least one second air release hole are arranged on the cover plate.

[0020] The second air outlet hole is communicated through the air outlet flow channel and the air outlet hole, and the second air release hole is communicated through the air release flow channel and the air release hole.

[0021] Further, the valve housing is arranged with a cover plate, at least one air outlet flow channel, at least one air release flow channel and at least one second air release hole are formed between the cover plate and the valve housing, and at least one second air outlet hole is arranged on the cover plate.

[0022] The second air outlet hole is communicated through the air outlet flow channel and the air outlet hole, and the second air release hole is communicated through the air release flow channel and the air release hole.

[0023] The beneficial effects of the present application are: the present application can effectively limit the maximum moving distance of the valve piece body through the limiting boss, thereby limiting the maximum opening of the valve passage, in the inflation process, the gas pressure flowing through the first gas hole is greater than the gas pressure in the first valve cavity, the intermediate valve piece is elastically deformed under the action of the gas pressure difference on both sides, the valve piece body is quickly pressed against the limiting boss, the pressure gas flows into the first valve cavity through the first gas hole, thereafter, the valve piece body is mainly affected by the unilateral gas pressure, avoiding the forced flutter of the intermediate valve piece caused by the fluctuation of the gas pressure difference on both sides when the valve piece body is affected by the gas pressure on both sides, thereby generating noise and fatigue damage, at the same time, the limiting boss limits the maximum opening of the valve passage, that is, the maximum deformation amount of the connecting part is limited, further reducing the risk of fatigue damage and even failure of the intermediate valve piece in the working process, prolonging the service life of the air leakage valve; in the deflation process, the gas pressure in the first valve cavity is greater than the gas pressure on the side of the first gas hole, the valve piece body pressed against the limiting boss is quickly pressed against the first gas hole under the action of the deformation restoring force of the intermediate valve piece and the pressure difference on both sides of the part of the valve piece body beyond the limiting boss, thereby cutting off the gas flow path between the first valve cavity and the first gas hole, ensuring that the pressure gas in the first valve cavity can only flow out through the air vent hole in the deflation process. BRIEF DESCRIPTION OF DRAWINGS

[0024] The present application will be further described below in combination with the drawings and examples.

[0025] Figure 1 is a deflation process schematic diagram of one air leakage valve structure in example 1;

[0026] Figure 2 is another deflation process schematic diagram of one air leakage valve structure in example 1;

[0027] Figure 3 is a deflation process schematic diagram of one air leakage valve structure in example 1;

[0028] Figure 4 is another deflation process schematic diagram of one air leakage valve structure in example 1;

[0029] Figure 5 is a schematic diagram of a continuous single valve piece body covering a single first gas hole in example 1;

[0030] Figure 6 is a schematic diagram of a continuous single valve piece body covering multiple first gas holes in example 1;

[0031] Figure 7 is another schematic diagram of a continuous single valve piece body covering multiple first gas holes in example 1;

[0032] Figure 8 is a schematic diagram of a discrete multiple valve piece body covering multiple first gas holes in example 1;

[0033] Figure 9 is another schematic view of a plurality of valve piece bodies covering a plurality of first air holes in the discrete plurality of valve piece bodies in Example 1;

[0034] Figure 10 is a schematic view of a first valve piece body covering a first air hole in Example 2;

[0035] Figure 11 is a schematic view of a second valve piece body covering a first air hole in Example 2;

[0036] Figure 12 is a schematic view of a third valve piece body covering a first air hole in Example 2;

[0037] Figure 13 is a schematic view of a fourth valve piece body covering a first air hole in Example 2;

[0038] Figure 14 is a schematic view of an air leak valve structure in an inflation process in Example 2;

[0039] Figure 15 is a schematic view of an air leak valve structure in a deflation process in Example 2;

[0040] Figure 16 is a schematic view of a first structure of a diaphragm and an intermediate valve piece integrally formed in an air leak valve in Example 3;

[0041] Figure 17 is a schematic view of a second structure of a diaphragm and an intermediate valve piece integrally formed in an air leak valve in Example 3;

[0042] Figure 18 is a schematic view of a third structure of a diaphragm and an intermediate valve piece integrally formed in an air leak valve in Example 3;

[0043] Figure 19 is a schematic view of a partial structure of a gap between a deformation portion and a lower valve cover in Example 4;

[0044] Figure 20 is a schematic view of a partial structure of a protrusion portion provided between a deformation portion and a lower valve cover in Example 5;

[0045] Figure 21 is a schematic view of another structure of a protrusion portion formed on a lower valve cover toward a deformation portion in Example 5;

[0046] Figure 22 is a schematic view of a partial structure of an air outlet groove and a deflation groove formed on a cover plate in Example 6;

[0047] Figure 23is a partial structural schematic view of the outer side wall of the upper valve cover forming the air outlet groove and the air release groove in Example 6;

[0048] Figure 24 is a partial structural schematic view of the outer side wall of the upper valve cover and the inner side wall of the cover plate forming the air outlet groove and the air release groove in Example 6;

[0049] Figure 25 is a partial structural schematic view of the cooperation between the cover plate and the upper valve cover forming the lateral second air release hole in Example 7;

[0050] In the figure: 1, valve housing, 101, air inlet side, 1011, first air hole, 1012, second air hole, 1013, second protruding part, 1014, protruding part; 102, air outlet side, 1021, air release hole, 1022, air outlet hole, 1023, limiting boss, 1024, first protruding part; 1-1, upper valve cover, 1-2, lower valve cover;

[0051] 2, intermediate valve plate, 201, connecting part, 2011, first connecting part, 2012, second connecting part, 2012a, hole part, 2012b, groove part, 202, valve plate body;

[0052] 3, diaphragm, 301, bonding part, 302, deformation part;

[0053] 4, first valve cavity, 5, second valve cavity, 6, valve passage, 7, cover plate, 8, second air outlet hole, 9, second air release hole, 10, air outlet flow channel, 11, air release flow channel;

[0054] h: height of the gap. DETAILED DESCRIPTION

[0055] The application will now be described in further detail with reference to the drawings. These drawings show only the essential features of the application and are not to scale. The drawings are schematic representations only of the basic structure of the application and therefore only show the features relevant to the application. Directions and references (e.g. upper, lower, left, right, etc.) can be used only to aid the description of features in the drawings. The following detailed description is therefore not to be taken in a limiting sense and the scope of the subject matter sought to be protected is defined only by the claims that follow and equivalents thereof.

[0056] Example 1

[0057] As Figures 1-9As shown, an air leakage valve capable of reducing noise and fatigue damage comprises a diaphragm structure and a valve housing 1 having an inner cavity, the inner cavity has a leakage hole 1021 and an outlet hole 1022 on an outlet side 102, and has at least one first air hole 1011 and at least one second air hole 1012 on an inlet side 101 opposite to the outlet side 102, the valve housing 1 can be a spliced structure, and in the embodiment, the valve housing 1 specifically comprises an upper valve cover 1-1 and a lower valve cover 1-2 arranged in a stacked manner, the inner cavity is formed between the upper valve cover 1-1 and the lower valve cover 1-2, the inner side wall of the upper valve cover 1-1 is the side wall of the inlet side 101 of the inner cavity, and the inner side wall of the lower valve cover 1-2 is the side wall of the outlet side 102 of the inner cavity;

[0058] The diaphragm structure comprises a diaphragm 3 and an intermediate valve plate 2, and the diaphragm 3 and the intermediate valve plate 2 are arranged separately;

[0059] Regarding the installation and structure of the diaphragm 3:

[0060] The diaphragm 3 is arranged in the inner cavity and forms a first valve cavity 4 isolated from the second air hole 1012 between the diaphragm 3 and the outlet side 102 of the inner cavity, the leakage hole 1021 and the outlet hole 1022 are both communicated with the first valve cavity 4, the diaphragm 3 is used for blocking the leakage hole 1021 when the second air hole 1012 is inhaled, and is used for opening the leakage hole 1021 when the outlet hole 1022 is inhaled, in the embodiment, the diaphragm 3 comprises a connecting part 301 and a deformation part 302 connected with each other, the connecting part 301 is fixedly connected with the side wall of the inlet side 101 of the inner cavity, the deformation part 302 is in contact with the side wall of the inlet side 101 of the inner cavity and is used for opening or blocking the leakage hole 1021;

[0061] In the embodiment, preferably, the outlet side 102 of the inner cavity has a first protruding part 1024 protruding towards the inlet side 101, the first protruding part 1024 is fixedly connected with or integrally formed with the inner side wall of the upper valve cover 1-1, and the leakage hole 1021 penetrates through the first protruding part 1024, it should be noted that the cross-sectional shape of the first protruding part 1024 can be a circular ring or a multi-edge ring (the inner and outer contour lines of the cross section are both closed structures), which is not limited herein, in the embodiment, the cross-sectional shape of the first protruding part 1024 is a circular ring, the first protruding part 1024 is in a whole cylindrical shape, and the leakage hole 1021 is arranged at the center of the first protruding part 1024.

[0062] Regarding the installation and structure of the intermediate valve plate 2:

[0063] The intermediate valve plate 2 is used for elastically deforming to form a valve channel 6 connecting the first air hole 1011 and the first valve cavity 4 when the first air hole 1011 is inhaled, and is used for resetting and being pressed against the side wall of the inlet side 101 of the inner cavity to block the first air hole 1011 when the outlet hole 1022 is inhaled;

[0064] The gas outlet side 102 of the inner cavity is convexly provided with a limiting boss 1023 opposite to the middle valve plate 2 towards the gas inlet side 101, the limiting boss 1023 is fixedly connected or integrally formed with the inner side wall of the upper valve cover 1-1, when the first gas hole 1011 is communicated with the gas, the limiting boss 1023 abuts against the middle valve plate 2 to limit the maximum opening of the valve passage 6; the cross-sectional shape of the limiting boss 1023 can be circular or polygonal, etc., which is not limited herein, and in the embodiment, the cross-sectional shape of the limiting boss 1023 is circular, and the limiting boss 1023 is in the shape of a cylinder as a whole.

[0065] The middle valve plate 2 comprises a connecting portion 201 and a valve plate body 202 connected with each other, the connecting portion 201 is fixedly connected with the gas inlet side 101 side wall of the inner cavity, and the valve plate body 202 is arranged opposite to the limiting boss 1023 and is used for opening or blocking the first gas hole 1011; it should be noted that in the initial state of the embodiment, the valve plate body 202 covers the first gas hole 1011, and the first gas hole 1011 is not communicated with the first valve cavity 4;

[0066] When the gas is filled, the valve plate body 202 is quickly pressed against the end face of the limiting boss 1023 away from the upper valve cover 1-1 under the action of the pressure difference of the gas on both sides, and the maximum opening of the valve passage 6 formed by the deformation of the middle valve plate 2 is limited by the limiting boss 1023; preferably, after the valve plate body 202 is pressed against the end face of the limiting boss 1023, the valve plate body 202 has a part that exceeds the end face of the limiting boss 1023 abutted by the valve plate body 202, which is beneficial to the resetting of the middle valve plate 2; the connecting portion 201 and the valve plate body 202 can be integrally formed or fixedly connected, preferably, the connecting portion 201 and the valve plate body 202 are integrally formed, which is beneficial to reducing the process difficulty and reducing the manufacturing cost; in the embodiment, the valve plate body 202 can be an elastic body or a non-elastic body; the connecting portion 201 is an elastic body, which is convenient for elastic deformation under the action of the pressure difference;

[0067] The valve plate body 202 is circular or polygonal, etc., which is not limited herein, as long as it can cover the first gas hole 1011; the connecting portion 201 of the middle valve plate 2 can be a continuous single connecting portion 201 or a plurality of discrete connecting portions 201; the valve plate body 202 can also be a continuous single valve plate body 202 or a plurality of discrete valve plate bodies 202, it is not difficult to understand that when the connecting portion 201 and the valve plate body 202 of the middle valve plate 2 are both discrete, a multi-valve structure is formed. Since the first gas hole 1011 can be one or more, and the single valve plate body 202 covers at least one first gas hole 1011, therefore, the valve plate body 202 of the middle valve plate 2 covering the first gas hole 1011 has multiple implementation forms; preferably, the connecting portion 201 of the middle valve plate 2 is a continuous single connecting portion 201; the specific implementation mode of the valve plate body 202 of the middle valve plate 2 covering the first gas hole 1011 includes but is not limited to the following several forms:

[0068] First, the valve piece body 202 of the intermediate valve piece 2 is a continuous single valve piece body 202, and covers a single first air hole 1011, as shown in Figure 5 ;

[0069] Second, the valve piece body 202 of the intermediate valve piece 2 is a continuous single valve piece body 202, and covers multiple first air holes 1011, as shown in Figure 6 and 7 , Figure 6 The valve piece body 202 is connected to the connecting part 201 on one side, Figure 7 The valve piece body 202 is annular and arranged around the connecting part 201;

[0070] Third, the valve piece body 202 of the intermediate valve piece 2 is a plurality of discrete valve piece bodies 202, and each discrete valve piece body 202 covers a single first air hole 1011, as shown in Figure 8 ;

[0071] Fourth, the valve piece body 202 of the intermediate valve piece 2 is a plurality of discrete valve piece bodies 202, and each discrete valve piece body 202 covers multiple first air holes 1011, as shown in Figure 9 .

[0072] Based on the above structure, the working process of the air leakage valve of the embodiment is as follows:

[0073] When inflating, the airflow with a certain pressure passes through the second air hole 1012, the deformation part 302 of the diaphragm 3 arches towards the air vent 1021 direction to form the second valve cavity 5, at the same time, the airflow with the same pressure lifts the valve piece body 202 of the intermediate valve piece 2, the intermediate valve piece 2 produces elastic deformation, the valve piece body 202 and the inner side wall of the lower valve cover 1-2 produce a valve passage 6, the valve piece body 202 overcomes the deformation resistance of the intermediate valve piece 2 under the action of the pressure difference of the two sides of the gas, and is quickly pressed to the limiting boss 1023 in the first valve cavity 4, after the pressure airflow passes through the first air hole 1011 and the valve passage 6, it enters the first valve cavity 4, this process will produce pressure drop, that is, the gas pressure in the first valve cavity 4 is less than the gas pressure entering the second valve cavity 5, under the action of the pressure difference, the deformation part 302 of the diaphragm 3 overcomes the elastic deformation resistance of itself and produces elastic deformation towards the air vent 1021 direction, and is quickly pressed to the inner side wall of the upper valve cover 1-1 opposite to it, and blocks the air vent 1021, as shown in Figures 3-4 .

[0074] It can be understood that, under the action of the gas pressure difference on both sides, the valve disc body 202 overcomes the deformation resistance of the middle valve disc 2 and quickly presses against the limiting boss 1023 in the first valve chamber 4. This can effectively weaken or even suppress the forced flutter of the valve disc body 202 under the action of the gas dynamic pressure, avoiding the generation of noise and fatigue damage. At the same time, the limiting boss 1023 limits the maximum opening of the valve channel 6, that is, limits the maximum deformation of the connecting portion 201, further reducing the risk of fatigue damage or even failure of the middle valve disc 2 during operation, thereby extending the service life of the leakage valve.

[0075] At the same time, it should be noted that during the inflation process, noise is generated within at least one pressure range. Assume that the maximum inflation pressure is P, and the noise pressure range is P1~P2, P3~P4, ..., P n ~P n+1 , where 0<P1<P2<P3<P4<P n <P n+1 ≤P. During the operation of the air leakage valve, when the inflation pressure is in the noise range, noise will be generated, affecting product performance and user experience. For the air leakage valve with a limiting boss 1023, assuming that the inflation pressure is P0, the valve body 202 abuts against the end face of the limiting boss 1023. As long as P0<P1, no noise will be generated during the entire inflation process. At the same time, P can be a higher pressure value, which obviously increases the pressure of the air leakage valve and the adjustment range of the flow rate related to the pressure.

[0076] When deflation occurs, the first air hole 1011 and the second air hole 1012 stop taking in air, the pressure is reduced, and the gas with a certain pressure stored in the external air storage device flows into the first valve cavity 4 through the air outlet 1022. Under the combined effect of the deformation recovery force of the intermediate valve plate 2 itself and the pressure difference on both sides of the valve plate body 202, the valve plate body 202 of the intermediate valve plate 2 is quickly pressed against the inner wall of the lower valve cover 1-2, and the first air hole 1011 is blocked, thereby blocking the gas in the first valve cavity 4. At the same time, the deformed portion 302 of the diaphragm 3 that blocks the air leakage port is quickly pressed against the inner wall of the lower valve cover 1-2 under the combined action of its own deformation recovery force and the gas pressure difference on both sides, and blocks the second air hole 1012, thereby releasing the blockage of the air leakage hole 1021. At this time, the pressurized gas flowing into the first valve cavity 4 from the external air storage device through the air outlet 1022 can only flow out from the air leakage hole 1021, completing the air release. Figures 1-2 shown.

[0077] It can be understood that, under the action of its own deformation restoring force and the gas pressure difference on both sides, the deformation part 302 is quickly pressed against the inner wall of the lower valve cover 1-2 opposite to it, which can quickly attenuate the impact energy of the pressure airflow on the deformation part 302, greatly weaken or even suppress the flutter of the deformation part 302, and effectively avoid the leakage valve from generating noise during the deflation process.

[0078] The opening height of the valve piece body 202 in the embodiment is limited by the limiting boss 1023, and there is no problem of deformation of the intermediate valve piece 2 increasing with the increase of the pressure difference, accelerating fatigue damage, and even causing plastic deformation of the intermediate valve piece 2, causing the intermediate valve piece 2 to fail, which can effectively prolong the service life of the product.

[0079] Embodiment 2

[0080] As shown in Figures 10-16 , the air leakage valve in the embodiment is basically the same as the air leakage valve in Embodiment 1, the difference is that the connecting part 201 includes a first connecting part 2011 and a second connecting part 2012, the first connecting part 2011 is fixedly connected with the side wall of the air inlet side 101 of the inner cavity, and the valve piece body 202 is connected with the first connecting part 2011 through the second connecting part 2012, and at least one hole part 2012a or groove part 2012b is penetrated on the second connecting part 2012.

[0081] Preferably, the cross-sectional shape of the hole part 2012a or the groove part 2012b can be circular, rectangular, polygonal, etc., which is not limited here.

[0082] The first connecting part 2011 and the second connecting part 2012 are integrally formed or fixedly connected, and the second connecting part 2012 and the valve piece body 202 can be integrally formed or fixedly connected; preferably, the first connecting part 2011, the second connecting part 2012 and the valve piece body 202 are integrally formed, which is beneficial to reduce the process difficulty and reduce the manufacturing cost; in the embodiment, the valve piece body 202 can be an elastic body, or it can be a non-elastic body; the first connecting part 2011 or / and the second connecting part 2012 is an elastic body, which is convenient for elastic deformation under the action of pressure difference.

[0083] The air inlet side 101 of the inner cavity has a second protruding part 1013 protruding towards the air outlet side 102, the first gas hole 1011 penetrates the second protruding part 1013, the valve piece body 202 abuts against the second protruding part 1013 and covers the first gas hole 1011, and the intermediate valve piece 2 is pre-elastically deformed towards the side where the limiting boss 1023 is located due to the abutment of the valve piece body 202 against the second protruding part 1013, that is, the valve piece body 202 has a certain pre-tightening force when covering the first gas hole 1011 in the initial state; it should be noted that the cross-sectional shape of the second protruding part 1013 can be a circular ring or a multi-edge ring, etc., which is not limited here, in the embodiment, the cross-sectional shape of the second protruding part 1013 is circular, the second protruding part 1013 is in the shape of a cylinder as a whole, and the first gas hole 1011 is arranged at the center of the second protruding part 1013.

[0084] The first connecting portion 2011 of the intermediate valve plate 2 can be a continuous single first connecting portion 2011 or a plurality of discrete first connecting portions 2011, and the second connecting portion 2012 can be a continuous single second connecting portion 2012 or a plurality of discrete second connecting portions 2012, and the valve plate body 202 can be a continuous single valve plate body 202 or a plurality of discrete valve plate bodies 202, and the single valve plate body 202 covers at least one first gas hole 1011.

[0085] The valve plate body 202 of the intermediate valve plate 2 covering the first gas hole 1011 has various implementation forms. Preferably, the valve plate body 202 of the intermediate valve plate 2 is a continuous single valve plate body 202, and the specific implementation form of the valve plate body 202 of the intermediate valve plate 2 covering the first gas hole 1011 includes but is not limited to the following forms:

[0086] First, the first connecting portion 2011 is a continuous single first connecting portion 2011, and the second connecting portion 2012 is a continuous single second connecting portion 2012, as shown in FIG. 2A, the first connecting portion 2011 is connected with the valve plate body 202 through the second connecting portion 2012, and the second connecting portion 2012 is provided with a hole portion 2012a; Figure 10

[0087] Second, the first connecting portion 2011 is a continuous single first connecting portion 2011, and the second connecting portion 2012 is a plurality of discrete second connecting portions 2012, as shown in FIG. 2B, the first connecting portion 2011 is annular, the second connecting portion 2012 and the valve plate body 202 are located in the first connecting portion 2011, a plurality of second connecting portions 2012 are connected between the valve plate body 202 and the first connecting portion 2011, and the second connecting portion 2012 is provided with a hole portion 2012a; Figure 11

[0088] Third, the first connecting portion 2011 is a plurality of discrete first connecting portions 2011, and the second connecting portion 2012 is a continuous single second connecting portion 2012, as shown in FIG. 2C, a plurality of first connecting portions 2011 are distributed around the second connecting portion 2012, the second connecting portion 2012 is connected with the valve plate body 202, and the second connecting portion 2012 is provided with a hole portion 2012a; Figure 12

[0089] Fourth, the first connecting portion 2011 is a plurality of discrete first connecting portions 2011, and the second connecting portion 2012 is a plurality of discrete second connecting portions 2012, as shown in FIG. 2D, each first connecting portion 2011 is connected with the valve plate body 202 through a single second connecting portion 2012, and the second connecting portion 2012 is provided with a groove portion 2012b. Figure 13

[0090] ​​​​When inflating, the pressure gas flow enters the second cavity through the second gas hole 1012, forming the second valve cavity 5, at the same time, the gas flow with the same pressure pushes up the valve body 202 of the middle valve plate 2, the second connecting part 2012 of the middle valve plate 2 is elastically deformed, or the second connecting part 2012 and the valve body 202 of the middle valve plate 2 are elastically deformed, the valve passage 6 is formed between the valve body 202 and the inner side wall of the lower valve cover 1-2, the hole part 2012a on the second connecting part 2012 communicates with the first gas hole 1011 through the valve passage 6, the valve body 202 overcomes the deformation resistance of the middle valve plate 2 under the action of the pressure difference between the two sides, and is quickly pressed against the limiting boss 1023 in the first valve cavity 4, the pressure gas flow enters the first valve cavity 4 through the first gas hole 1011, the valve passage 6 and the hole part 2012a of the second connecting part 2012, and a pressure drop occurs, that is, the gas pressure in the first valve cavity 4 is less than the gas pressure entering the second valve cavity 5, under the action of the pressure difference, the deformed part 302 of the diaphragm 3 overcomes the elastic deformation resistance of itself and is elastically deformed towards the air vent hole 1021, and is quickly pressed against the inner side wall of the upper valve cover 1-1 opposite to it and blocks the air vent hole 1021, because the air vent hole 1021 is blocked, the gas with a certain pressure can only flow into the first valve cavity 4 through the first gas hole 1011 and then flow out to the external gas storage device through the gas outlet hole 1022, as shown in Figure 14 .

[0091] When deflating, the first gas hole 1011 and the second gas hole 1012 stop inflating, the pressure decreases, the gas with a certain pressure stored in the external gas storage device flows into the first valve cavity 4 through the gas outlet hole 1022, the valve body 202 of the middle valve plate 2 is quickly pressed against the inner side wall of the lower valve cover 1-2 and blocks the first gas hole 1011 under the joint action of the deformation restoring force of the second connecting part 2012 or the second connecting part 2012 and the valve body 202 and the pressure difference between the two sides of the valve body 202, thereby blocking the flow path of the gas in the first valve cavity 4 flowing out through the first gas hole 1011, at the same time, the deformed part 302 of the diaphragm 3 that blocks the air vent hole 1021 is quickly pressed against the inner side wall of the lower valve cover 1-2 and blocks the second gas hole 1012 under the joint action of the deformation restoring force of itself and the pressure difference between the two sides of the gas, thereby unblocking the air vent hole 1021, at this time, the pressure gas in the first valve cavity 4 from the external gas storage device through the gas outlet hole 1022 can only flow out through the air vent hole 1021, completing deflation, as shown in Figure 15 .

[0092] Example 3

[0093] As shown in Figures 16-18 , the air leakage valve in this embodiment is basically the same as the air leakage valves in examples 1 and 2, the difference is that the diaphragm 3 and the middle valve plate 2 are integrally formed.

[0094] Example 4

[0095] As Figure 19 shown, the air leakage valve in this embodiment is basically the same as the air leakage valve in embodiments 1-3, the difference is that a gap is left between the deformed part 302 and the side wall of the inner cavity on the air inlet side 101 to form a second valve cavity 5; preferably, the height of the gap is as small as possible, the height of the gap is h, 0 < h ≤ 0.8 mm, so that during the air release process, the deformed part 302 of the diaphragm 3 quickly abuts against the air inlet side 101 side wall of the lower valve cover 1-2 under the joint action of its own deformation recovery force and the pressure difference of the gas on both sides, quickly attenuates the impact energy of the pressure gas flow on the deformed part 302, greatly reduces or even inhibits the flutter of the deformed part 302, and effectively avoids noise generated by the air leakage valve during the air release process.

[0096] Embodiment 5

[0097] As Figures 20-21 shown, the air leakage valve in this embodiment is basically the same as the air leakage valve in embodiments 1-4, the difference is that the second valve cavity 5 has a protruding part 1014 protruding towards the side where the air vent hole 1021 is located, the deformed part 302 abuts against the protruding part 1014, and the protruding part 1014 is integrally formed with or fixed to the inner side wall of the lower valve cover 1-2; when the protruding part 1014 is integrally formed with the lower valve cover 1-2, as Figure 20 shown, the inner side wall of the lower valve cover 1-2 is partially thickened to form the protruding part 1014; or, when the protruding part 1014 is integrally formed with the lower valve cover 1-2, as Figure 21 shown, the inner side wall of the lower valve cover 1-2 is recessed towards the direction of the air vent hole 1021, forming the protruding part 1014 protruding from the inner side wall of the lower valve cover 1-2;

[0098] It should be noted that the cross-sectional shape of the protruding part 1014 can be circular, polygonal, circular ring or multi-sided ring, etc., which is not limited here;

[0099] The diaphragm 3 is elastically deformed towards the side where the air vent hole 1021 is located due to the abutment of the deformed part 302 against the protruding part 1014; that is, in the initial state, the deformed part 302 has a certain tension, and during the air release process, the pressure gas flow flows into the first valve cavity 4 through the air outlet hole 1022, at this time, the gas pressure in the first valve cavity 4 is greater than that in the second valve cavity 5, the deformed part 302 is quickly pressed against the protruding part 1014 under the action of its own deformation recovery force and the pressure difference of the gas on both sides, and due to the certain tension of the deformed part 302 in this state, it can quickly attenuate the impact energy of the pressure gas flow on the deformed part 302, greatly reduce or even inhibit the flutter of the deformed part 302, and effectively avoid noise generated by the air leakage valve during the air release process.

[0100] Embodiment 6

[0101] AsFigures 22-24 As shown, the air leakage valve in the embodiment is basically the same as the air leakage valve structure in Embodiments 1-5, with the difference being that the valve housing 1 is provided with a cover plate 7, at least one air outlet channel 10 and at least one air leakage channel 11 are formed between the cover plate 7 and the valve housing 1, and the cover plate 7 is provided with at least one second air outlet hole 8 and at least one second air leakage hole 9;

[0102] The second air outlet hole 8 is communicated through the air outlet channel 10 and the air outlet hole 1022; the second air leakage hole 9 is communicated through the air leakage channel 11 and the air leakage hole 1021;

[0103] It should be noted that the air outlet channel 10 and the air leakage channel 11 are at least one, and similarly, the second air outlet hole 8 and the second air leakage hole 9 are at least one; specifically, a single second air outlet hole 8 is configured to be communicated with two or more air outlet channels 10 and air outlet holes 1022; or, each second air outlet hole 8 is configured to be communicated with a single air outlet hole 1022 to adapt to the case of multiple loads or multiple external gas storage devices; similarly, a single second air leakage hole 9 is configured to be communicated with two or more air leakage channels 11 and air leakage holes 1021; or, each second air leakage hole 9 is configured to be communicated with a single air leakage channel 11 and air leakage hole 1021 to improve the air leakage speed;

[0104] In addition, it should be noted that the forms of the air outlet channel 10 and the air leakage channel 11 formed by the cooperation between the cover plate 7 and the upper valve cover 1-1 include but are not limited to the following forms:

[0105] One is that the inner side wall of the cover plate 7 is formed with air outlet grooves and air leakage grooves, and when the inner side wall of the cover plate 7 and the outer side wall of the upper valve cover 1-1 are connected, the air outlet grooves and the air leakage grooves are sealed, thereby forming the air outlet channel 10 and the air leakage channel 11, as shown in Figure 22 ;

[0106] The second is that the outer side wall of the upper valve cover 1-1 is formed with air outlet grooves and air leakage grooves, and when the inner side wall of the cover plate 7 and the outer side wall of the upper valve cover 1-1 are connected, the air outlet grooves and the air leakage grooves are sealed, thereby forming the air outlet channel 10 and the air leakage channel 11, as shown in Figure 23 ;

[0107] Thirdly, the inner side wall of the cover plate 7 is formed with air outlet grooves and air release grooves, and the outer side wall of the upper valve cover 1-1 is also formed with air outlet grooves and air release grooves, the air outlet grooves on the inner side wall of the cover plate 7 can correspond to the air outlet grooves on the outer side wall of the upper valve cover 1-1 one by one, the air release grooves on the inner side wall of the cover plate 7 can correspond to the air release grooves on the outer side wall of the upper valve cover 1-1 one by one, when the inner side wall of the cover plate 7 is connected with the outer side wall of the upper valve cover 1-1, the air outlet grooves on the inner side wall of the cover plate 7 and the corresponding air outlet grooves on the outer side wall of the upper valve cover 1-1 form air outlet flow channels 10, and the air release grooves on the inner side wall of the cover plate 7 and the corresponding air release grooves on the outer side wall of the upper valve cover 1-1 form air release flow channels 11, as shown in Figure 24 or, the air outlet grooves on the inner side wall of the cover plate 7 do not correspond to the air outlet grooves on the outer side wall of the upper valve cover 1-1 one by one, the air release grooves on the inner side wall of the cover plate 7 do not correspond to the air release grooves on the outer side wall of the upper valve cover 1-1 one by one, when the inner side wall of the cover plate 7 is connected with the outer side wall of the upper valve cover 1-1, the air outlet grooves and the air release grooves are sealed, thereby forming the air outlet flow channels 10 and the air release flow channels 11.

[0108] Embodiment 7

[0109] As shown in Figure 25 , the air leakage valve in the embodiment is basically the same as the air leakage valve in Embodiment 6, and the difference is that the valve shell 1 is arranged with a cover plate 7, at least one air outlet flow channel 10, at least one air release flow channel 11 and at least one second air release hole 9 are formed between the cover plate 7 and the valve shell 1, and at least one second air outlet hole 8 is arranged on the cover plate 7.

[0110] The second air outlet hole 8 is communicated through the air outlet flow channel 10 and the air outlet hole 1022; the second air release hole 9 is communicated through the air release flow channel 11 and the air release hole 1021.

[0111] Compared with Embodiment 6, the second air release hole 9 is formed by cooperation between the inner side wall of the cover plate 7 and the outer side wall of the upper valve cover 1-1, which also determines that the orientations of the second air release hole 9 and the second air outlet hole 8 are different, so that side air release can be realized, position interference with external gas storage equipment can be avoided, and the application range is improved.

[0112] The above is the ideal embodiment according to the present application, through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content in the specification, and must be determined according to the scope of claims.

Claims

1. A leakage valve for reducing noise and fatigue damage, comprising a diaphragm structure and a valve housing (1) having an inner cavity, the inner cavity having a leakage hole (1021) and an air outlet hole (1022) on an air outlet side (102), and at least one first air hole (1011) and at least one second air hole (1012) on an air inlet side (101) opposite to the air outlet side (102), characterized in that: The diaphragm structure comprises a diaphragm (3) and an intermediate valve plate (2); The diaphragm (3) is arranged in the inner cavity and forms a first valve cavity (4) with the gas outlet side (102) of the inner cavity and isolated from the second gas hole (1012), the air vent hole (1021) and the gas outlet hole (1022) are communicated with the first valve cavity (4), the diaphragm (3) is used for blocking the air vent hole (1021) when the second gas hole (1012) is inhaled, and the air vent hole (1021) is opened when the gas outlet hole (1022) is inhaled. The intermediate valve plate (2) is used for elastic deformation to form a valve channel (6) communicating the first gas hole (1011) and the first valve cavity (4) when the first gas hole (1011) is inhaled, and is reset and pressed against the side wall of the gas inlet side (101) of the inner cavity to block the first gas hole (1011) when the gas outlet hole (1022) is inhaled. The gas outlet side (102) of the inner cavity protrudes towards the gas inlet side (101) and is provided with a limiting boss (1023) opposite to the intermediate valve plate (2); The intermediate valve plate (2) comprises a connecting part (201) and a valve plate body (202) connected with each other, the connecting part (201) is fixedly connected with the side wall of the gas inlet side (101) of the inner cavity, and the valve plate body (202) is arranged opposite to the limiting boss (1023) and used for opening or blocking the first gas hole (1011); When the first gas hole (1011) is inhaled, the limiting boss (1023) abuts against the intermediate valve plate (2) to limit the maximum opening of the valve channel (6); After the valve plate body (202) is pressed against the end face of the limiting boss (1023), the valve plate body (202) has a part protruding from the end face of the limiting boss (1023).

2. The blow-by valve that reduces noise and fatigue damage according to claim 1, characterized by: The connecting part (201) comprises a first connecting part (2011) and a second connecting part (2012), the first connecting part (2011) is fixedly connected with the side wall of the gas inlet side (101) of the inner cavity, the valve plate body (202) is connected with the first connecting part (2011) through the second connecting part (2012), and at least one hole part (2012a) or slot part (2012b) is formed in the second connecting part (2012).

3. The blow-by gas valve for reducing noise and fatigue damage according to claim 1 or 2, characterized by: The gas inlet side (101) of the inner cavity has a second protruding part (1013) protruding towards the gas outlet side (102), the first gas hole (1011) penetrates through the second protruding part (1013), the valve plate body (202) abuts against the second protruding part (1013) and covers the first gas hole (1011), and the intermediate valve plate (2) is elastically deformed towards the side where the limiting boss (1023) is located due to the abutment of the valve plate body (202) against the second protruding part (1013).

4. The blow-by valve that reduces noise and fatigue damage according to claim 1, characterized by: The diaphragm (3) comprises a connecting part (301) and a deformation part (302) connected with each other, the connecting part (301) is fixedly connected with the side wall of the gas inlet side (101) of the inner cavity, and the deformation part (302) is arranged opposite to the air vent hole (1021) and used for opening or blocking the air vent hole (1021). The deformed part (302) and the side wall of the air inlet side (101) of the inner cavity are left with a gap to form a second valve cavity (5), the height of the gap is h, 0 5. The blow-by valve that reduces noise and fatigue damage according to claim 4, characterized by: The air outlet side (102) of the inner cavity has a first protruding part (1024) protruding towards the air inlet side (101), and the air bleed hole (1021) penetrates the first protruding part (1024).

6. The blow-by valve that reduces noise and fatigue damage according to claim 4, characterized by: The second valve cavity (5) has a protruding part (1014) protruding towards the side where the air bleed hole (1021) is located, the deformed part (302) abuts against the protruding part (1014), and the diaphragm (3) elastically deforms towards the side where the air bleed hole (1021) is located due to the abutment of the deformed part (302) against the protruding part (1014).

7. The blow-by gas valve of claim 1, wherein: The diaphragm (3) and the intermediate valve plate (2) are integrally formed or separately arranged.

8. The blow-by gas valve of claim 1, wherein: The valve housing (1) is provided with a cover plate (7), at least one air outlet flow channel (10) and at least one air bleed flow channel (11) are formed between the cover plate (7) and the valve housing (1), and at least one second air outlet hole (8) and at least one second air bleed hole (9) are arranged on the cover plate (7). The second air outlet hole (8) is communicated through the air outlet flow channel (10) and the air outlet hole (1022), and the second air bleed hole (9) is communicated through the air bleed flow channel (11) and the air bleed hole (1021).

9. The blow-by gas valve of claim 1, wherein: The valve housing (1) is provided with a cover plate (7), at least one air outlet flow channel (10), at least one air bleed flow channel (11) and at least one second air bleed hole (9) are formed between the cover plate (7) and the valve housing (1), and at least one second air outlet hole (8) is arranged on the cover plate (7). The second air outlet hole (8) is communicated through the air outlet flow channel (10) and the air outlet hole (1022), and the second air bleed hole (9) is communicated through the air bleed flow channel (11) and the air bleed hole (1021).

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