Exhaust electromagnetic valve for fuel cell

Abstract

The exhaust electromagnetic valve for the fuel cell comprises a valve body and an electromagnetic component arranged on the valve body, the electromagnetic component comprises a shell, a coil, a static iron core assembly and a movable iron core, the coil, the static iron core assembly and the movable iron core are arranged in the shell, and the static iron core assembly comprises the static iron core matched with the movable iron core. A spring is arranged between the static iron core and the movable iron core, the valve body is provided with a valve port, and the static iron core and the movable iron core are matched with each other to control closing of the valve port. Wherein the shell is mounted on the static iron core assembly through a nut; and a mounting flange is detachably arranged between the electromagnetic component and the valve body. The independent mounting flange and the nut capable of being repeatedly disassembled and assembled are designed on the electromagnetic valve, the mounting flange can be selected and matched according to the structure of the interface, the interface mounting requirements of different users are met, and the use flexibility is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of control valves, and more particularly, to an exhaust solenoid valve for a fuel cell. Background Art

[0002] With the development of the world economy, energy and environmental issues are becoming the focus of attention of various countries and gradually becoming a hot topic in the technical research of the power system field. As a clean and efficient power device, fuel cell technology generates electrical energy through the chemical reaction of hydrogen and oxygen and is used in various fields of production and life. Its by-product is only water, which is a clean technology.

[0003] On the exhaust pipeline of a fuel cell, a solenoid valve is required that can meet the hydrogen usage environment, isolate the medium from the solenoid valve actuator, and also meet the requirements of opening at low temperature and low voltage, with a relatively long required switching life, and can also meet different installation interface requirements on the same series of solenoid valves. Utility Model Content

[0004] To solve the above problems, it is necessary to provide an exhaust solenoid valve for a fuel cell, which can meet the needs of different customers for the exhaust valve at low cost by using technologies such as independent installation flanges, detachable locking nuts, seal port coatings, and moving iron core coatings.

[0005] According to one aspect of the present application, there is provided an exhaust solenoid valve for a fuel cell, including a valve body and an electromagnetic component disposed on the valve body. The electromagnetic component includes a housing, a coil, a static iron core assembly, and a moving iron core disposed in the housing. The static iron core assembly includes a static iron core that cooperates with the moving iron core, and a spring is disposed between the static iron core and the moving iron core. The valve body is provided with a valve port, and the static iron core and the moving iron core cooperate with each other to control the opening and closing of the valve port;

[0006] Wherein, the housing and the static iron core assembly are fixedly connected;

[0007] An installation flange is detachably disposed between the electromagnetic component and the valve body.

[0008] As a further improvement of the present invention, the installation flange is disposed between the housing and the valve body.

[0009] As a further improvement of the present invention, a first sealing ring is disposed between the installation flange and the housing, and a second sealing ring is disposed between the installation flange and the valve body; when the installation flange is fixed, the first sealing ring is pressed and fixed by the installation flange, and the second sealing ring is pressed and fixed by the installation flange.

[0010] As a further improvement of the present invention, the surface of the moving iron core is provided with a Teflon coating, or a nickel coating or a zinc coating is provided by electroplating or electroless plating.

[0011] As a further improvement of the present invention, a Teflon coating is provided on the end face of the valve port.

[0012] As a further improvement of the present invention, the static iron core assembly further includes a sleeve and a valve cover provided at the end of the sleeve. At least part of the static iron core and the moving iron core are arranged inside the sleeve. The static iron core is fixedly connected to the sleeve, and the moving iron core axially moves inside the sleeve.

[0013] As a further improvement of the present invention, a diaphragm is provided on the moving iron core, and the diaphragm is fixed between the static iron core assembly and the valve body.

[0014] As a further improvement of the present invention, the diaphragm is threadedly connected to the moving iron core.

[0015] As a further improvement of the present invention, the housing and the static iron core assembly are fixedly connected by a nut. The nut is threadedly connected to the static iron core, and a sealing ring is provided between the nut and the housing.

[0016] Compared with the prior art, the embodiment of the present utility model has an independent flange structure and a repeatedly disassemblable nut locking structure, which can meet the different installation interface requirements of users; the surface of the moving iron core is provided with a coating, which can significantly improve the service life of the solenoid valve; the valve port is provided with a coating, which can significantly improve the opening performance of the solenoid valve at low temperature and low voltage; the diaphragm type isolation valve structure ensures that the moving parts of the valve core are not affected by the medium, solving the problem of valve jamming. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] These and / or other aspects and advantages of the present application will become clearer and easier to understand from the following detailed description of the embodiments of the present application in conjunction with the drawings, where:

[0018] Figure 1 is a cross-sectional view (I) of the exhaust solenoid valve for fuel cells of the present disclosure.

[0019] Figure 2 is a cross-sectional view (II) of the exhaust solenoid valve for fuel cells of the present disclosure.

[0020] Figure 3a is a schematic structural view of the exhaust solenoid valve for fuel cells of the present disclosure.

[0021] Figure 3b is another schematic structural view of the exhaust solenoid valve for fuel cells of the present disclosure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] In order to enable those skilled in the art to better understand the present application, the present application will be further described in detail below in conjunction with the drawings and specific embodiments.

[0023] An exhaust solenoid valve for a fuel cell provided by an embodiment of the present disclosure includes a valve body 8 and an electromagnetic component disposed on the valve body. The electromagnetic component includes a coil 2, a static iron core assembly 3, and a moving iron core 5. The static iron core assembly 3 includes a static iron core 3.1 that cooperates with the moving iron core 5. A spring 4 is disposed between the static iron core 3.1 and the moving iron core 5. The valve body 8 is provided with a valve port 8.1, and the static iron core 3.1 and the moving iron core 5 cooperate with each other to control the closing of the valve port. Among them, the coil 2 is installed on the electromagnetic component through a nut 1; an installation flange 6 is disposed between the electromagnetic component and the valve body.

[0024] In the exhaust solenoid valve for a fuel cell provided by the present disclosure, in order to meet the interface requirements of different users, an independent installation flange and a reusable nut 1 are designed. The installation flange 6 can be selected according to the structure of the interface, improving the flexibility of use.

[0025] Specifically, the installation flange 6 is disposed between the housing 9 and the valve body 8.

[0026] A first sealing ring 10 is disposed between the installation flange 6 and the housing 9, and a second sealing ring 20 is disposed between the installation flange 6 and the valve body 8. Specifically, the second sealing ring 20 is disposed between the valve cover 3.3 and the installation flange 6; when the installation flange 6 is fixed, the first sealing ring 10 is pressed and fixed by the installation flange 6, and the second sealing ring 20 is pressed and fixed by the installation flange 6. Specifically, as Figure 1 and Figure 2 shown, the installation groove for placing the first sealing ring 10 can be provided on the housing 9 or on the installation flange 6, and the installation groove for placing the second sealing ring 20 can be provided on the valve cover 3.3 or on the installation flange 6. After the housing 9, the installation flange 6, and the valve body 8 are assembled, the first sealing ring 10 and the second sealing ring 20 are pressed and deformed, that is, pressed and fixed, making the overall structure of the solenoid valve more compact and the sealing effect better.

[0027] Preferably, the surface of the moving iron core 5 is provided with one of a Teflon coating, an electroplated coating, and a electroless plating coating. Preferably, it is a Teflon coating. The Teflon coating can reduce the friction during the movement of the moving iron core 5 and increase its service life.

[0028] Further, the end face of the valve port is provided with a Teflon coating. The Teflon coating can reduce the adhesion between the valve stem on the moving iron core 5 and the valve port at low temperature, enhance the opening performance at low temperature and low voltage, and can also increase the sealing performance and reduce leakage.

[0029] In some embodiments, the static iron core assembly further includes a sleeve 3.2 and a valve cover 3.3 disposed at the end of the sleeve 3.2. The static iron core 3.1 and the moving iron core 5 are at least partially disposed within the sleeve 3.2. The static iron core 3.1 and the sleeve 3.2 are fixedly connected by a welding process, preferably laser welding. The moving iron core 5 can axially move within the sleeve 3.2. The static iron core assembly 3 is formed by welding these three parts. Compared with the commonly used integrated structure in the prior art, the cost can be effectively reduced.

[0030] In some embodiments, a diaphragm 7 is provided on the moving iron core 5 to isolate the fluid medium within the valve body 8. The diaphragm is composed of two parts. One part is the isolation part that plays the main isolation role, and its material is rubber. The other part is the threaded connection part connected to the moving iron core, and its material is a metal part. The two parts are fixed by a vulcanization process. The setting of the diaphragm-type isolation valve structure isolates the medium within the cavity surrounded by the valve body and the diaphragm, that is, it prevents the medium from entering the cavity composed of the sleeve and the static iron core.

[0031] In addition, as Figure 1 shown, a circumferential annular groove is provided on the valve body 8, and the outer peripheral end of the isolation part of the diaphragm 7 is recessed into this annular groove. The valve cover 3.3 and the valve body 8 press the outer peripheral end of the isolation part, realizing the fixation of the outer peripheral end of the diaphragm 7 and simultaneously realizing the sealing and isolation function.

[0032] Embodiment 1

[0033] As Figure 1 shown, an exhaust solenoid valve for a fuel cell includes a valve body 8 and an electromagnetic component disposed on the valve body. The electromagnetic component includes a coil 2, a static iron core assembly 3, and a moving iron core 5. The static iron core assembly 3 includes a static iron core 3.1 that cooperates with the moving iron core 5. A spring 4 is disposed between the static iron core 3.1 and the moving iron core 5. The valve body 8 is provided with a valve port. The static iron core 3.1 and the moving iron core 5 cooperate to control the opening and closing of the valve port. The coil 2 is installed on the static iron core assembly through a nut 1. An installation flange 6 is disposed between the electromagnetic component and the valve body 8. The static iron core assembly 3 is connected to the valve body 8 by press-fitting and simultaneously fixes the diaphragm 7. The moving iron core is placed in the inner hole of the static iron core assembly 3. The diaphragm 7 is connected to the moving iron core 5 by a thread. A sealing valve port is provided on the valve body 8. The sealing element on the diaphragm 7 and the valve port realize the sealing control of the working medium. The nut 1 installs the coil 2 on the static iron core assembly. An installation flange 6 is fixed between the housing 9 and the valve body 8. The spring 4 is installed between the static iron core assembly 3 and the moving iron core 5.

[0034] The static iron core assembly 3 is composed of a static iron core 3.1, a sleeve 3.2, and a valve cover 3.3. The static iron core and the sleeve are connected by laser welding, and the sleeve and the valve cover are also connected by laser welding.

[0035] Working principle in use:

[0036] When the coil 2 is de-energized, the spring force applied by the spring 4 presses the moving iron core 5 and the diaphragm 7 tightly against the valve port on the valve body 8, thus closing the valve; when the coil 2 is energized, the electromagnetic force overcomes the spring force and attracts the moving iron core 5 to the end face of the static iron core assembly 3, thus opening the valve.

[0037] To increase the service life of this solenoid valve, a Teflon coating is provided on the outer circumferential surface of the moving iron core 5 to reduce the frictional force during its movement and increase its service life.

[0038] To enhance the opening performance at low temperature and low voltage, a Teflon coating is provided at the sealing port of the valve body 8 to reduce the adhesiveness at low temperature, improve the sealing performance of the valve port, and reduce leakage.

[0039] To meet the interface requirements of different customers, an independent flange 6 is designed to meet the customer interface, and a reusable nut 1.

[0040] The basic principles of this application have been described above in combination with specific embodiments. However, it should be noted that the advantages, advantages, effects, etc. mentioned in this application are only examples and not limitations. It cannot be considered that these advantages, advantages, effects, etc. are essential for each embodiment of this application. In addition, the above-disclosed specific details are only for the purposes of illustration and facilitating understanding, rather than limitations. The above details do not limit this application to necessarily adopt the above specific details to be implemented. In addition, the features from one embodiment can be combined with the features of another or more embodiments to obtain more embodiments.

[0041] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and do not intend to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any way. Words such as "including", "comprising", "having", etc. are open-ended terms, meaning "including but not limited to", and can be used interchangeably with each other. The word "or" and "and" used herein refer to the word "and / or", and can be used interchangeably with each other, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to", and can be used interchangeably with each other.

[0042] In addition, as used herein, the "or" used in the enumeration of items starting with "at least one" indicates a separate enumeration. For example, the enumeration of "at least one of A, B, or C" means A or B or C, or AB or AC or BC, or ABC (i.e., A and B and C). In addition, the term "exemplary" does not mean that the described examples are preferred or better than other examples.

[0043] It should also be noted that in the apparatus and method of the present application, each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent solutions of the present application.

[0044] Various changes, substitutions, and alterations to the techniques described herein can be made without departing from the techniques taught by the appended claims. In addition, the scope of the claims of the present application is not limited to the specific aspects of the processes, machines, manufactures, compositions of events, means, methods, and acts described above. Current or later-developed processes, machines, manufactures, compositions of events, means, methods, or acts that perform substantially the same function or achieve substantially the same result as the corresponding aspects described herein can be utilized. Thus, the appended claims include such processes, machines, manufactures, compositions of events, means, methods, or acts within their scope.

[0045] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

[0046] The above description has been given for purposes of illustration and description. This description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and subcombinations thereof.

Claims

1. An exhaust solenoid valve for a fuel cell, characterized in that: The invention comprises a valve body (8) and an electromagnetic component arranged on the valve body, wherein the electromagnetic component comprises a housing (9), a coil (2), a static iron core assembly (3), and a moving iron core (5) arranged in the housing (9), wherein the static iron core assembly (3) comprises a static iron core (3.1) cooperating with the moving iron core (5), a spring (4) being arranged between the static iron core (3.1) and the moving iron core (5), and the valve body (8) is provided with a valve port (8.1), wherein the static iron core (3.1) and the moving iron core (5) cooperate with each other to control the opening and closing of the valve port (8.1); Wherein, the housing (9) and the static iron core assembly (3) are fixedly connected; A mounting flange (6) is detachably provided between the electromagnetic component and the valve body (8).

2. The exhaust solenoid valve for a fuel cell according to claim 1, wherein: The mounting flange (6) is arranged between the housing (9) and the valve body (8).

3. The exhaust solenoid valve for a fuel cell according to claim 2, wherein: A first sealing ring (10) is arranged between the mounting flange (6) and the housing (9), and a second sealing ring (20) is arranged between the mounting flange (6) and the valve body (8); when the mounting flange (6) is fixed, the first sealing ring (10) is pressed and fixed by the mounting flange (6), and the second sealing ring (20) is pressed and fixed by the mounting flange (6).

4. The exhaust solenoid valve for a fuel cell according to claim 1, wherein: The surface of the moving iron core (5) is provided with a Teflon coating, or a nickel coating or a zinc coating is provided by electroplating or chemical plating.

5. The exhaust solenoid valve for a fuel cell according to claim 1, wherein: The end surface of the valve port (8.1) is provided with a Teflon coating.

6. The exhaust solenoid valve for a fuel cell according to claim 1, wherein: The static iron core assembly also includes a sleeve (3.2) and a valve cover (3.3) arranged at the end of the sleeve (3.2); the static iron core (3.1) and the moving iron core (5) are at least partially arranged in the sleeve (3.2), wherein the static iron core (3.1) is fixedly connected to the sleeve (3.2), and the moving iron core (5) moves axially in the sleeve (3.2).

7. The exhaust solenoid valve for a fuel cell according to any one of claims 1 to 6, characterized in that: A diaphragm (7) is provided on the moving iron core (5), and the diaphragm (7) is fixed between the stationary iron core assembly (3) and the valve body (8).

8. The exhaust solenoid valve for a fuel cell according to claim 7, wherein: The diaphragm (7) is threadedly connected to the moving iron core (5).

9. The exhaust solenoid valve for a fuel cell according to claim 6, wherein: The housing (9) and the static iron core assembly (3) are fixedly connected via a nut (1); the nut (1) and the static iron core (3.1) are threadedly connected; and a sealing ring is provided between the nut (1) and the housing (9).

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