Electromagnetic valve diaphragm and electromagnetic valve

Abstract

The invention relates to an electromagnetic valve diaphragm and an electromagnetic valve. The electromagnetic valve diaphragm comprises a first pressing part and elastic parts, the first pressing part is provided with a first through hole for a movable iron core of an electromagnetic valve to penetrate through and used for being clamped between a return spring of the electromagnetic valve and the movable iron core, and the elastic parts are connected to the periphery of the first pressing part and symmetrically arranged about the center point of the first through hole. The elastic part is used for applying elastic force towards the movable iron core to the first pressing part so as to limit the offset of the central axis of the movable iron core. According to the electromagnetic valve diaphragm, the movable iron core can be limited, the situation that the movable iron core violently shakes in the first through hole can be avoided to a certain extent, and then the movable iron core interferes with the valve body in the moving process, that is, the electromagnetic valve diaphragm can protect the movable iron core and the valve body, and the service life of the movable iron core is prolonged. And the reliability and the response timeliness of the electromagnetic valve can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of solenoid valve components, and in particular to a solenoid valve diaphragm and a solenoid valve. Background Art

[0002] As a basic automation component that can control fluids, the solenoid valve can adjust a series of parameters such as the direction, flow rate, and flow velocity of the medium. By manually powering on or off the power to the coil of the solenoid valve, the valve core of the solenoid valve can move, thereby realizing the opening or closing of the solenoid valve.

[0003] Solenoid valves are widely used in industrial control systems as a control device. In related technologies, in order to keep the valve core in the center of the valve body, a diaphragm is usually used to limit the valve core of the solenoid valve. However, the limiting effect of the diaphragm decreases after a period of use, which easily causes the valve core to interfere with the valve body during movement, thereby affecting the response time of the solenoid valve. Summary of the invention

[0004] Based on this, it is necessary to provide a solenoid valve diaphragm and a solenoid valve that improve the above technical problem because the valve core easily interferes with the valve body, thereby affecting the response time of the solenoid valve in the related technology.

[0005] According to a first aspect of the present application, an embodiment of the present application provides a solenoid valve diaphragm, comprising:

[0006] A first pressing portion is provided with a first through hole for the moving iron core of the electromagnetic valve to pass through, and is used to be clamped between the return spring of the electromagnetic valve and the moving iron core; and

[0007] The elastic part is connected to the periphery of the first clamping part and is symmetrically arranged about the center point of the first through hole. The elastic part is used to apply an elastic force to the first clamping part toward the moving iron core to limit the offset of the central axis of the moving iron core.

[0008] In one of the embodiments, the elastic part is formed with a balancing hole penetrating along the extending direction of the moving iron core, and the balancing hole is used to balance the air pressure on both sides of the electromagnetic valve diaphragm.

[0009] In one embodiment, the elastic portion includes a plurality of elastic members that are symmetrical about the center point of the first through hole and are spaced apart at the periphery of the first pressing portion, and a balancing hole is formed between two adjacent elastic members.

[0010] In one embodiment, a cross section of the elastic portion in a radial direction of the solenoid valve diaphragm is wavy.

[0011] In one embodiment, the solenoid valve diaphragm also includes an insert portion extending along its axial direction and connected to the first clamping portion. The insert portion is provided with a second through hole that is connected to the first through hole and is used for the moving iron core to pass through. The insert portion is used to be inserted on the moving iron core.

[0012] In one embodiment, the solenoid valve diaphragm further includes a second pressing portion whose central axis coincides with the central axis of the first through hole and is connected to an end of the elastic portion away from the first pressing portion, and the second pressing portion is used to connect to the valve body of the solenoid valve.

[0013] In one embodiment, the first pressing portion and the second pressing portion are respectively formed into annular structures and the centers of the two circles coincide with each other;

[0014] The first pressing part, the elastic part and the second pressing part are all made of metal material.

[0015] According to the second aspect of the present application, an embodiment of the present application provides a solenoid valve, comprising a valve body, a moving iron core passing through the valve body and capable of moving relative to the valve body, a return spring arranged in the valve body and sleeved on the moving iron core, and the solenoid valve diaphragm in any of the above embodiments, the solenoid valve diaphragm is sleeved on the moving iron core and clamped between the return spring and the moving iron core, one end of the solenoid valve diaphragm away from the moving iron core is connected to the valve body, the valve body is provided with a mounting hole, and the central axis of the mounting hole coincides with the central axis of the first through hole.

[0016] In one embodiment, the solenoid valve diaphragm further includes a plug-in portion extending along its axial direction and connected to the first pressing portion, and the plug-in portion is provided with a second through hole communicating with the first through hole and for the moving iron core to pass through;

[0017] The moving iron core is provided with an inserting groove matched with the inserting part.

[0018] In one of the embodiments, the solenoid valve further comprises a clamping member located in the mounting hole and sleeved on the moving iron core, the solenoid valve diaphragm is clamped between the moving iron core and the clamping member, and the clamping member can press the plug-in portion into the plug-in slot.

[0019] Through the above technical solution, the moving iron core is inserted into the first through hole formed by the first clamping part of the electromagnetic valve diaphragm, the first clamping part is clamped between the return spring and the moving iron core, and the elastic part is connected to the first clamping part, so that the electromagnetic valve diaphragm can move with the movement of the moving iron core. The elastic part of the electromagnetic valve diaphragm is symmetrical about the center point of the first through hole, and can apply symmetrical elastic force to the first clamping part to limit the offset of the central axis of the moving iron core, so as to achieve the limit of the moving iron core, and to a certain extent, can avoid the moving iron core from shaking violently in the first through hole, and then interfere with the valve body during the movement, that is, the electromagnetic valve diaphragm provided by the present application can protect the moving iron core and the valve body, which is conducive to improving the reliability and timeliness of response of the electromagnetic valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a partial cross-sectional view of a solenoid valve in one embodiment of the present application.

[0021] Figure 2 Schematic diagram of the structure of the solenoid valve diaphragm in one embodiment of the present application.

[0022] Figure 3 for Figure 1 Cutaway view with valve body and return spring removed.

[0023] Figure 4 Schematic diagram of the structure of the moving iron core in one embodiment of the present application.

[0024] Figure 5 Schematic diagram of the structure of a clamping member in one embodiment of the present application.

[0025] Explanation of the reference numerals: 10 - solenoid valve diaphragm; 1 - first clamping part; 11 - first through hole; 2 - elastic part; 21 - balancing hole; 22 - elastic member; 3 - second clamping part; 4 - plug-in part; 20 - moving iron core; 21 - plug-in slot; 30 - return spring; 40 - valve body; 41 - mounting hole; 50 - clamping member; 100 - solenoid valve. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0027] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0028] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0029] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0030] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may also be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method. "Inside and outside" refer to the inside and outside of the contour of the relevant parts.

[0032] A hydrogen fuel cell system is a battery system that uses hydrogen to generate electricity. The battery system is usually equipped with a solenoid valve that automatically switches on and off by electromagnetic force. The solenoid valve can provide hydrogen fuel to the fuel cell on the one hand, and can provide high-speed gas to the ejector on the other hand, which is used to improve the ejection capacity of the ejector. The solenoid valve usually includes a valve body, a moving iron core, and a return spring sleeved on the moving iron core. The valve body is provided with a mounting hole for the moving iron core to pass through. The two ends of the return spring are respectively in contact with the hole wall of the mounting hole and the moving iron core. The return spring can exert an elastic force on the moving iron core away from the valve body, so that the moving iron core moves in a direction away from the valve body, thereby closing the valve; when the coil of the solenoid valve is energized, the moving iron core can overcome the spring force of the return spring under the action of the electromagnetic force and move toward the direction of the valve body, thereby opening the valve.

[0033] In the related art, a diaphragm is usually provided to limit the moving iron core. The diaphragm is connected to the valve body and sleeved on the moving iron core. A through hole for the moving iron core to pass through is provided at the center of the diaphragm. The central axis of the through hole coincides with the central axis of the moving iron core, so that the moving iron core can be limited. The diaphragm is connected to the valve body, and the diaphragm can be limited so that the central axis of the diaphragm coincides with the central axis of the mounting hole on the valve body for the moving iron core to pass through, which is conducive to coinciding the central axis of the moving iron core with the central axis of the mounting hole, facilitating the movement of the moving iron core in the valve body, and to a certain extent avoiding interference between the two, which is conducive to protecting the valve body and the moving iron core. However, since the diaphragm moves with the moving iron core, the moving iron core is rigidly connected to the diaphragm, so that the through hole of the diaphragm is prone to wear after a period of time, and the moving iron core is prone to obvious shaking in the gradually enlarged through hole of the diaphragm, causing the central axis of the through hole to be staggered with the central axis of the moving iron core, and then the central axis of the moving iron core is staggered with the central axis of the mounting hole of the valve body, making the moving iron core easily interfere with the valve body during movement, affecting the response time of the solenoid valve, and then affecting the injection volume of the solenoid valve.

[0034] Based on this, see Figures 1 to 5 The embodiment of the present application provides a solenoid valve diaphragm 10 and a solenoid valve 100 having the solenoid valve diaphragm 10. The solenoid valve diaphragm 10 and the solenoid valve 100 can be applied not only to the above-mentioned hydrogen fuel cell system, but also to other systems that require fluid control. The solenoid valve diaphragm 10 is sleeved on the moving iron core 20, and after a period of use, the central axis of the moving iron core 20 can still coincide with the central axis of the mounting hole 41 of the valve body 40, which can effectively avoid the interference between the moving iron core 20 and the valve body 40 during movement, thereby improving the reliability and timeliness of response of the solenoid valve 100.

[0035] According to the first aspect of the present application, refer to Figures 1 to 5The embodiment of the present application provides a solenoid valve diaphragm 10, including a first clamping portion 1 and an elastic portion 2. The first clamping portion 1 is provided with a first through hole 11 for allowing the moving iron core 20 of the solenoid valve 100 to pass through, and is used to be clamped between the return spring 30 of the solenoid valve 100 and the moving iron core 20. The elastic portion 2 is connected to the periphery of the first clamping portion 1 and is symmetrically arranged about the center point of the first through hole 11. The elastic portion 2 is used to apply an elastic force to the first clamping portion 1 toward the moving iron core 20 to limit the offset of the central axis of the moving iron core 20.

[0036] Through the above technical solution, the moving iron core 20 is inserted into the first through hole 11 formed by the first clamping part 1 of the electromagnetic valve diaphragm 10, the first clamping part 1 is clamped between the return spring 30 and the moving iron core 20, and the elastic part 2 is connected to the first clamping part 1, so that the electromagnetic valve diaphragm 10 can move with the movement of the moving iron core 20. The elastic part 2 of the electromagnetic valve diaphragm 10 is symmetrical about the center point of the first through hole 11, and can apply symmetrical elastic forces to the first clamping part 1 to limit the offset of the central axis of the moving iron core 20, so as to achieve the limit of the moving iron core 20, to a certain extent, avoid the moving iron core 20 from shaking violently in the first through hole 11, and then interfere with the valve body 40 during the movement. The electromagnetic valve diaphragm 10 provided in the present application can protect the moving iron core 20 and the valve body 40, which is conducive to improving the reliability and timeliness of response of the electromagnetic valve 100.

[0037] It should be noted that since the elastic part 2 can exert a symmetrical elastic force on the first clamping part 1, the moving iron core 20 and the solenoid valve diaphragm 10 are flexibly connected. The elastic part 2 can dynamically adjust the position of the first clamping part 1 according to the shaking of the moving iron core 20, so that the central axis of the moving iron core 20 can coincide with the central axis of the first through hole 11 of the first clamping part 1 as much as possible, thereby effectively reducing the wear between the moving iron core 20 and the hole wall of the first through hole 11, and then improving the limiting effect of the solenoid valve diaphragm 10 on the moving iron core 20, and effectively avoiding the interference of the moving iron core 20 with the valve body 40 during movement.

[0038] In some embodiments, see Figures 1 to 3 The first through hole 11 for the moving iron core 20 to pass through can be arranged at the center of the first clamping part 1, that is, the central axis of the first clamping part 1 can coincide with the central axis of the first through hole 11, so that the elastic part 2 can dynamically adjust the position of the first through hole 11 by applying elastic force to the first clamping part 1, which can effectively reduce the wear between the moving iron core 20 and the hole wall of the first through hole 11.

[0039] In some embodiments, see Figure 2The elastic part 2 is formed with a balancing hole 21 penetrating along the extension direction of the moving iron core 20, and the balancing hole 21 is used to balance the air pressure on both sides of the electromagnetic valve diaphragm 10. When the electromagnetic valve diaphragm 10 is applied to the above-mentioned hydrogen fuel cell system, the electromagnetic valve 100 having the electromagnetic valve diaphragm 10 can provide hydrogen fuel for the fuel cell and high-speed gas for the ejector. The balancing hole 21 provided on the elastic part 2 of the electromagnetic valve diaphragm 10 can balance the air pressure on both sides of the electromagnetic valve diaphragm 10, so that the moving iron core 20 can be moved in the valve body 40 as much as possible under the elastic force of the return spring 30 and the electromagnetic force of the coil, and the influence of the air pressure of the gas in the hydrogen fuel cell system on the movement of the moving iron core 20 can be avoided to a certain extent.

[0040] In some embodiments, see Figure 2 The elastic part 2 includes a plurality of elastic members 22 which are symmetrical about the center point of the first through hole 11 and are arranged at intervals on the periphery of the first pressing part 1, and a balancing hole 21 is formed between two adjacent elastic members 22. Since the plurality of elastic members 22 are symmetrically arranged, symmetrical elastic forces can be provided to the first pressing part 1, so that the position of the first pressing part 1 can be dynamically adjusted, so that the central axis of the moving iron core 20 can coincide with the central axis of the first through hole 11 of the first pressing part 1 as much as possible.

[0041] The present application does not limit the specific number of the elastic members 22. In some embodiments, refer to Figure 2 , the number of the elastic members 22 may be 4. The present application does not limit the specific selection of the elastic member 22. In some embodiments, the elastic member 22 may be a spring, and there is a gap between adjacent coils of the spring, and the size of the gap increases after stretching, which is conducive to quickly balancing the air pressure on both sides of the solenoid valve diaphragm 10.

[0042] In other embodiments, in order to form the above-mentioned balancing hole 21, the elastic part 2 can also be directly formed into a fan ring structure (a large fan-shaped minus a small fan-shaped concentrically), and the two ends of the fan ring structure can be respectively connected to the periphery of the first pressing part 1 and the valve body 40, and the fan ring structure can be directly formed with a balancing hole 21 for balancing the air pressure on both sides of the solenoid valve diaphragm 10. The number of the balancing holes 21 can be multiple, thereby improving the efficiency of balancing the air pressure, which is conducive to improving the reliability of the solenoid valve 100.

[0043] In the related art, the diaphragm used to limit the moving iron core is usually a sheet-like structure. During the test of high-speed switching valves hundreds of millions of times, the diaphragm is prone to breakage, which in turn affects the service life of the solenoid valve.

[0044] Based on this, in some embodiments, refer to Figure 2The cross section of the elastic part 2 in the radial direction of the electromagnetic valve diaphragm 10 is wavy. Since the elastic part 2 is elastic and the cross section of the elastic part 2 in the radial direction of the electromagnetic valve diaphragm 10 is wavy, the electromagnetic valve diaphragm 10 can be expanded and contracted in the process of moving with the moving iron core 20, which is beneficial to protecting the electromagnetic valve diaphragm 10 and improving the service life of the electromagnetic valve diaphragm 10.

[0045] In some embodiments, see Figures 1 to 3 The solenoid valve diaphragm 10 also includes a plug-in portion 4 extending along its axial direction and connected to the first clamping portion 1. The plug-in portion 4 is provided with a second through hole (not shown) that is connected to the first through hole 11 and is used for the moving iron core 20 to pass through. The plug-in portion 4 is used to be inserted on the moving iron core 20.

[0046] Correspondingly, in some embodiments, see Figure 1 , Figure 3 and Figure 4 The moving iron core 20 may be provided with a plug-in groove 21 that cooperates with the plug-in portion 4, that is, when assembling the solenoid valve diaphragm 10 and the moving iron core 20, the plug-in portion 4 of the solenoid valve diaphragm 10 may be pressed into the plug-in groove 21 of the moving iron core 20. In this way, the coaxiality of the solenoid valve diaphragm 10 and the moving iron core 20 can be improved, which is beneficial to the normal operation of the solenoid valve 100.

[0047] In the above implementation, see Figures 1 to 3 The plug-in portion 4 can be connected to the hole wall of the first through hole 11 of the first pressing portion 1, or the plug-in portion 4 can also be connected to a position of the first pressing portion 1 away from the first through hole 11, which is not limited in the present application. The diameter of the second through hole of the plug-in portion 4 can be the same as the diameter of the first through hole 11, or the diameter of the second through hole can be larger than the diameter of the first through hole 11, so that the moving iron core 20 can pass through.

[0048] In some embodiments, the plug-in portion 4 and the plug-in slot 21 can be connected in an interference fit manner, thereby effectively preventing the plug-in portion 4 from being separated from the plug-in slot 21, which is beneficial for the solenoid valve diaphragm 10 and the moving iron core 20 to move synchronously and improve the coaxiality of the solenoid valve diaphragm 10 and the moving iron core 20.

[0049] In some embodiments, see Figures 1 to 3 The solenoid valve diaphragm 10 further includes a second pressing portion 3 whose central axis coincides with the central axis of the first through hole 11 and is connected to an end of the elastic portion 2 away from the first pressing portion 1, and the second pressing portion 3 is used to connect with the valve body 40 of the solenoid valve 100. The connection between the second pressing portion 3 and the valve body 40 can increase the connection area between the solenoid valve diaphragm 10 and the valve body 40, which is conducive to improving the limiting effect of the solenoid valve diaphragm 10.

[0050] In some embodiments, see Figures 1 to 3The first pressing part 1 and the second pressing part 3 are respectively formed into annular structures and the centers of the two coincide with each other. The two ends of the elastic part 2 can be connected to the outer circumference of the first pressing part 1 and the inner circumference of the second pressing part 3 respectively, and the first pressing part 1, the elastic part 2 and the second pressing part 3 can be connected to each other along the radial direction of the solenoid valve diaphragm 10. The centers of the annular structures formed by the first pressing part 1 and the second pressing part 3 coincide with each other, so that the central axes of the first pressing part 1 and the second pressing part 3 coincide with each other.

[0051] In some embodiments, in order to improve the service life of the solenoid valve diaphragm 10, the first pressing portion 1, the elastic portion 2 and the second pressing portion 3 are all made of metal materials. Figures 1 to 3 In an embodiment provided in the present application, the elastic part 2 may be a metal spring.

[0052] In other embodiments, if the service life of the solenoid valve diaphragm 10 is not considered, the elastic portion 2 may also be made of elastic materials such as rubber and silicone.

[0053] According to the second aspect of the present application, refer to Figure 1 The embodiment of the present application provides a solenoid valve 100, including a valve body 40, a moving iron core 20 penetrating the valve body 40 and capable of moving relative to the valve body 40, a return spring 30 arranged in the valve body 40 and sleeved on the moving iron core 20, and the solenoid valve diaphragm 10 in any of the above embodiments, the solenoid valve diaphragm 10 is sleeved on the moving iron core 20 and clamped between the return spring 30 and the moving iron core 20, one end of the solenoid valve diaphragm 10 away from the moving iron core 20 is connected to the valve body 40, the valve body 40 is provided with a mounting hole 41, and the central axis of the mounting hole 41 coincides with the central axis of the first through hole 11.

[0054] Since the elastic part 2 of the solenoid valve diaphragm 10 can dynamically adjust the position of the first through hole 11 of the first clamping part 1, the central axis of the moving iron core 20 can be made as close to the central axis of the first through hole 11 as possible, and the central axis of the mounting hole 41 of the valve body 40 coincides with the central axis of the first through hole 11 of the solenoid valve diaphragm 10, which is conducive to making the central axis of the moving iron core 20 as close to the central axis of the mounting hole 41 of the valve body 40 as possible, and can effectively avoid interference between the moving iron core 20 and the valve body 40, thereby improving the reliability and timeliness of response of the solenoid valve 100.

[0055] In some embodiments, see Figures 1 to 4 The solenoid valve diaphragm 10 also includes a plug-in portion 4 extending along its axial direction and connected to the first clamping portion 1. The plug-in portion 4 is provided with a second through hole connected to the first through hole 11 and used for the moving iron core 20 to pass through. The moving iron core 20 is provided with a plug-in groove 21 that cooperates with the plug-in portion 4, thereby improving the coaxiality of the solenoid valve diaphragm 10 and the moving iron core 20.

[0056] In some embodiments, see Figure 1 , Figure 3 and Figure 5 The solenoid valve 100 further includes a pressing member 50 located in the mounting hole 41 and sleeved on the moving iron core 20. The solenoid valve diaphragm 10 is clamped between the moving iron core 20 and the pressing member 50. The pressing member 50 can press the plug-in portion 4 into the plug-in slot 21. Since the thickness of the solenoid valve diaphragm 10 is relatively thin, the pressing member 50 is provided between the solenoid valve diaphragm 10 and the return spring 30, which can prevent the return spring 30 from damaging the solenoid valve diaphragm 10 to a certain extent, thereby being beneficial to protecting the solenoid valve diaphragm 10 and improving the service life of the solenoid valve diaphragm 10.

[0057] The present application does not limit the specific shape of the pressing member 50. In some embodiments, refer to Figure 1 , Figure 3 and Figure 5 The pressing member 50 can be formed as a pressing flange, and two sides of the pressing flange are respectively in contact with the return spring 30 of the solenoid valve 100 and the solenoid valve diaphragm 10 .

[0058] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A solenoid valve diaphragm, characterized in that: include: A first pressing portion, provided with a first through hole for a moving iron core of the electromagnetic valve to pass through, and used for clamping between a return spring of the electromagnetic valve and the moving iron core; and An elastic portion is connected to the periphery of the first clamping portion and is symmetrically arranged about the center point of the first through hole, and is used to apply an elastic force to the first clamping portion toward the moving iron core to limit the offset of the central axis of the moving iron core.

2. The solenoid valve diaphragm according to claim 1, characterized in that: The elastic part is formed with a balancing hole penetrating along the extending direction of the moving iron core, and the balancing hole is used to balance the air pressure on both sides of the electromagnetic valve diaphragm.

3. The solenoid valve diaphragm according to claim 2, characterized in that: The elastic portion includes a plurality of elastic members that are symmetrical about the center point of the first through hole and are spaced apart at the periphery of the first pressing portion, and the balancing hole is formed between two adjacent elastic members.

4. The solenoid valve diaphragm according to any one of claims 1 to 3, characterized in that: The cross section of the elastic portion in the radial direction of the solenoid valve diaphragm is wavy.

5. The solenoid valve diaphragm according to any one of claims 1 to 3, characterized in that: The solenoid valve diaphragm also includes an inserting portion extending along its axial direction and connected to the first clamping portion. The inserting portion is provided with a second through hole communicating with the first through hole and used for the moving iron core to pass through. The inserting portion is used to be inserted on the moving iron core.

6. The solenoid valve diaphragm according to any one of claims 1 to 3, characterized in that: The solenoid valve diaphragm also includes a second pressing portion whose central axis coincides with the central axis of the first through hole and is connected to an end of the elastic portion away from the first pressing portion, and the second pressing portion is used to be connected to the valve body of the solenoid valve.

7. The solenoid valve diaphragm according to claim 6, characterized in that: The first pressing portion and the second pressing portion are respectively formed into annular structures and the centers of the two circles coincide with each other; The first pressing portion, the elastic portion and the second pressing portion are all made of metal material.

8. A solenoid valve, characterized in that: It includes a valve body, a moving iron core passing through the valve body and capable of moving relative to the valve body, a return spring provided in the valve body and sleeved on the moving iron core, and an electromagnetic valve diaphragm as described in any one of claims 1 to 7, wherein the electromagnetic valve diaphragm is sleeved on the moving iron core and clamped between the return spring and the moving iron core, one end of the electromagnetic valve diaphragm away from the moving iron core is connected to the valve body, the valve body is provided with the mounting hole, and the central axis of the mounting hole coincides with the central axis of the first through hole.

9. The solenoid valve according to claim 8, characterized in that: The solenoid valve diaphragm further comprises an inserting portion extending along its axial direction and connected to the first pressing portion, wherein the inserting portion is provided with a second through hole communicating with the first through hole and used for the moving iron core to pass through; The moving iron core is provided with an inserting slot matched with the inserting portion.

10. The solenoid valve according to claim 9, characterized in that: The solenoid valve further comprises a pressing piece located in the mounting hole and sleeved on the moving iron core, the solenoid valve diaphragm is clamped between the moving iron core and the pressing piece, and the pressing piece can press the plug-in portion into the plug-in slot.

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