Electromagnetic control structure for high-pressure cylinder valve

Abstract

The utility model relates to an electromagnetic control structure for a high-pressure cylinder valve. The electromagnetic valve comprises a valve seat, the valve seat comprises a first containing cavity and a second containing cavity which are communicated with each other, and a static iron core assembly is installed in the first containing cavity; the movable iron core assembly is movably mounted in the first accommodating cavity and is matched with the static iron core assembly; the main valve is movably installed in the second containing cavity, a pilot air hole is formed in the main valve in a penetrating mode, the pilot air hole comprises a first end and a second end which are oppositely arranged, and the main valve end faces located at the first end and the second end of the pilot air hole can be in sealing fit with the gas cylinder outlet and the movable iron core assembly respectively; the movable iron core assembly can move along the first containing cavity so as to open or close the second end of the pilot air hole. And when the second end of the pilot gas hole is opened, the main valve can move along the second accommodating cavity so as to open the gas cylinder outlet. According to the utility model, the abrasion condition of the electromagnetic valve under high-frequency use is reduced, so that the failure rate is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of high-pressure hydrogen valves, in particular to an electromagnetic control structure for a high-pressure bottle valve. Background Technique

[0002] The hydrogen bottle valve is a key component in the hydrogen supply system of fuel cells. Its main function is to intelligently control the high-pressure hydrogen in the gas storage cylinder, and it has multiple safety functions such as real-time temperature detection and feedback, automatic and manual pressure relief, etc. It is applicable to new energy fuel cell vehicles and has a relatively high usage frequency.

[0003] Its working principle is achieved through the on-off control of the solenoid valve: when the solenoid valve is powered on, the electromagnetic force overcomes the gas pressure, the reset spring force, and the friction force to open the pilot valve. As the gas in the pilot valve cavity flows out and the pressure drops, when the pressure in the gas cylinder and the pressure in the pilot valve cavity reach a preset pressure difference, the main valve is opened. After the solenoid valve is powered off, the pressure in the gas cylinder is equal to the pressure in the pilot valve cavity and the outlet pressure. At this time, the reset spring force overcomes the friction force to push the main valve and the pilot valve to the closed position.

[0004] To reduce the use of pipelines and pipe fittings, reduce the leakage risk, and make the hydrogen supply system structure more compact, usually the solenoid valve, manual stop valve, TPRD (temperature-type pressure relief device), temperature sensor, pressure sensor, relief valve, flow-limiting valve and other devices are integrated together. The assembly also has a filter and a pressure sensor interface built in.

[0005] Due to the relatively high working frequency of the solenoid valve, its failure rate is relatively high, and most of the existing bottle valves adopt an in-built structure, which is not convenient for maintenance and repair. Summary of the Invention

[0006] Therefore, the utility model provides an electromagnetic control structure for a high-pressure bottle valve, which reduces the wear of the solenoid valve under high-frequency use, thereby reducing the failure rate.

[0007] To solve the above technical problems, the utility model provides an electromagnetic control structure for a high-pressure bottle valve, including:

[0008] A valve seat, installed on the outer side wall of the shell of the gas cylinder. The shell is provided with a gas cylinder outlet. The valve seat includes a first accommodating cavity and a second accommodating cavity that are connected and communicated;

[0009] A static iron core assembly, installed in the first accommodating cavity;

[0010] A moving iron core assembly, movably installed in the first accommodating cavity and cooperating with the static iron core assembly;

[0011] The main valve is movably installed in the second accommodation cavity. A pilot air hole is provided through the main valve. The pilot air hole includes a first end and a second end arranged opposite to each other. The end faces of the main valve at the first end and the second end of the pilot air hole can be respectively in sealing cooperation with the gas cylinder outlet and the moving iron core assembly.

[0012] Wherein, the moving iron core assembly can move along the first accommodation cavity to open or close the second end of the pilot air hole.

[0013] When the second end of the pilot air hole is opened, the main valve can move along the second accommodation cavity to open the gas cylinder outlet.

[0014] In an embodiment of the present utility model, the static iron core assembly includes a static iron core that is in interference fit with the first accommodation cavity and abuts against the bottom wall of the first accommodation cavity.

[0015] In an embodiment of the present utility model, the moving iron core assembly includes a moving iron core, a stopper installed in the inner hole of the moving iron core, and a return spring respectively abutting against the stopper and the static iron core. The return spring is used to provide a force for the moving iron core to move away from the static iron core.

[0016] In an embodiment of the present utility model, a cap is threadedly connected to one end of the valve seat away from the housing. A first sealing ring in contact with the valve seat is arranged inside the cap.

[0017] In an embodiment of the present utility model, a sealing gasket is installed on the bottom wall of the inner hole of the moving iron core. The stopper abuts against the sealing gasket through the return spring. A sealing hole seat extends from the bottom wall of the inner hole of the moving iron core towards the main valve. One end of the main valve facing the moving iron core is provided with a sealing end that can be in sealing cooperation with the sealing hole seat and abut against the sealing gasket.

[0018] In an embodiment of the present utility model, the sealing hole seat and the sealing end are in sealing cooperation through a conical surface.

[0019] In an embodiment of the present utility model, a compression nut is further included. An installation cavity is provided on the outer side wall of the housing. The valve seat is pressed in the installation cavity through the compression nut.

[0020] In an embodiment of the present utility model, a second sealing ring is arranged between the valve seat and the bottom wall of the installation cavity.

[0021] In an embodiment of the present utility model, a spring energy storage ring that abuts against the inner wall of the second accommodation cavity is sleeved outside the main valve.

[0022] In an embodiment of the present utility model, a clamp for limiting the spring energy storage ring is sleeved outside the main valve.

[0023] The above technical solution of the present utility model has the following advantages compared with the prior art:

[0024] An electromagnetic control structure for a high-pressure bottle valve according to the present utility model, by arranging a static iron core assembly, a moving iron core assembly and a main valve in the valve seat, has a compact structure and is convenient for disassembly, improving the reliability and maintainability of the system.

[0025] One end of the valve seat of the present utility model away from the shell is threadedly connected with a cap, and a sealing ring is arranged inside the cap. This detachable design makes it more convenient to maintain and replace components. The valve seat adopts an integral stainless steel structure, with a compact structure, few leakage points and high strength, enhancing the durability and reliability of the valve and reducing the need for frequent maintenance.

[0026] Through the arrangement of the spring energy storage ring, the present utility model significantly reduces the friction force during the movement of the main valve, improves the sensitivity and response speed of the valve opening and closing, extends the service life of the hydrogen cylinder valve, and reduces the component wear caused by friction. Description of the Drawings

[0027] In order to make the content of the present utility model easier to be clearly understood, the following further details the present utility model according to the specific embodiments of the present utility model in conjunction with the drawings.

[0028] Figure 1 is the overall structural schematic diagram of the electromagnetic control structure of the high-pressure bottle valve of the present utility model.

[0029] Figure 2 is the installation structural schematic diagram of the spring energy storage ring of the present utility model.

[0030] Explanation of the reference numerals in the drawings:

[0031] 1. Valve seat;

[0032] 2. Static iron core assembly; 21. Static iron core;

[0033] 3. Moving iron core assembly; 31. Moving iron core; 311. Sealing hole seat; 32. Block; 33. Return spring; 34. Sealing gasket;

[0034] 4. Main valve; 41. Pilot air hole; 42. Sealing end; 43. Spring energy storage ring; 44. Clamp;

[0035] 5. Shell; 51. Cylinder outlet;

[0036] 6. Cap;

[0037] 7. Compression nut;

[0038] 8. First sealing ring;

[0039] 9. Second sealing ring. Detailed implementation manners

[0040] The following further describes the present utility model in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present utility model and be able to implement it, but the embodiments cited do not limit the present utility model.

[0041] In the present utility model, when directions (up, down, left, right, front and back) are described, it is only for the convenience of describing the technical solution of the present utility model, rather than indicating or implying that the technical features referred to must have a specific orientation, be constructed and operated in a specific orientation, so it should not be understood as a limitation to the present utility model.

[0042] In the present utility model, the meaning of "several" is one or more, the meaning of "multiple" is two or more, and "greater than", "less than", "exceeding", etc. are understood not to include the present number; "above", "below", "within", etc. are understood to include the present number. In the description of the present utility model, if "first" and "second" are described, they are only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0043] In the present utility model, unless otherwise clearly defined, words such as "set", "installed", "connected", etc. should be understood in a broad sense. For example, they can be directly connected, or indirectly connected through an intermediate medium; they can be fixedly connected, or detachably connected, or integrally formed; they can be mechanically connected, or electrically connected or capable of communicating with each other; they can be the communication inside two components or the interaction relationship between two components. Those skilled in the art can reasonably determine the specific meaning of the above words in the present utility model in combination with the specific content of the technical solution.

[0044] Refer to Figure 1 As shown, an electromagnetic control structure for a high-pressure bottle valve of the present utility model includes:

[0045] A valve seat 1, installed on the outer side wall of the shell 5 of the gas cylinder. The shell 5 is provided with a gas cylinder outlet 51. The valve seat 1 includes a first accommodating cavity and a second accommodating cavity that are communicated with each other;

[0046] A static iron core assembly 2, installed in the first accommodating cavity;

[0047] A moving iron core assembly 3, movably installed in the first accommodating cavity and cooperating with the static iron core assembly 2;

[0048] The main valve 4 is movably installed in the second accommodation cavity. A pilot air hole 41 is provided through the main valve 4. The pilot air hole 41 includes a first end and a second end which are oppositely arranged. The end faces of the main valve 4 at the first end and the second end of the pilot air hole 41 can be hermetically engaged with the gas cylinder outlet 51 and the moving iron core assembly 3 respectively;

[0049] Wherein, the moving iron core assembly 3 can move along the first accommodation cavity to open or close the second end of the pilot air hole 41;

[0050] When the second end of the pilot air hole 41 is opened, the main valve 4 can move along the second accommodation cavity to open the gas cylinder outlet 51.

[0051] In one embodiment, the static iron core assembly 2 includes a static iron core 21 which is in interference fit with the first accommodation cavity and abuts against the bottom wall of the first accommodation cavity.

[0052] Specifically, the moving iron core assembly 3 includes a moving iron core 31, a stop block 32 installed in the inner hole of the moving iron core 31, and a return spring 33 which abuts against the stop block 32 and the static iron core 21 respectively. The return spring 33 is used to provide a force for the moving iron core 31 to move away from the static iron core 21.

[0053] In one embodiment, a cap 6 is threadedly connected to one end of the valve seat 1 away from the housing 5. A first sealing ring 8 which contacts the valve seat 1 is arranged inside the cap 6. The valve seat 1 adopts an integral stainless steel structure, with a compact structure, few leakage points and high strength.

[0054] In one embodiment, a sealing gasket 34 is installed on the bottom wall of the inner hole of the moving iron core 31. The stop block 32 abuts against the sealing gasket 34 through the return spring 33. A sealing hole seat 311 extending towards the main valve 4 is arranged on the bottom wall of the inner hole of the moving iron core 31. One end of the main valve 4 towards the moving iron core 31 (i.e., the end face of the main valve 4 at the first end of the pilot air hole 41) is provided with a sealing end 42 which can be hermetically engaged with the sealing hole seat 311 and abuts against the sealing gasket 34.

[0055] Specifically, the sealing gasket 34 is made of special plastic, is not easy to deform and has a high safety factor.

[0056] In one embodiment, the sealing hole seat 311 and the sealing end 42 are hermetically engaged through a conical surface. The end face of the main valve 4 at the second end of the pilot air hole 41 and the gas cylinder outlet 51 are in conical surface fit.

[0057] In one embodiment, a compression nut 7 is further included. An installation cavity is arranged on the outer side wall of the housing 5. The valve seat 1 is pressed in the installation cavity through the compression nut 7.

[0058] Specifically, a second sealing ring 9 is provided between the valve seat 1 and the bottom wall of the installation cavity.

[0059] In one embodiment, as shown in Figure 2 a spring energy storage ring 43 that abuts against the inner wall of the second accommodation cavity is sleeved outside the main valve 4. By providing the spring energy storage ring 43, the frictional force during the movement of the main valve 4 can be reduced, and the response performance can be increased.

[0060] Specifically, a clamp 44 for limiting the spring energy storage ring 43 is sleeved outside the main valve 4.

[0061] The working principle is as follows: When the solenoid valve is energized, an electromagnetic force is generated. The electromagnetic force overcomes the air pressure, the spring force of the return spring 33, and the frictional force of the moving iron core 31 to open the pilot air hole 41 of the main valve 4. The gas in the inner cavity of the pilot air hole 41 of the main valve 4 flows out, and the pressure drops. When the air pressure generated by the pressure difference between the pressure in the gas cylinder and the pressure in the inner cavity of the pilot air hole 41 of the main valve 4 is greater than the frictional force generated by the main valve 4 due to the spring energy storage ring 43, the sealing surface between the main valve 4 and the housing 5 is separated until it is fully opened; when the solenoid valve is de-energized, at this time, the pressure in the gas cylinder is equal to the pressure in the inner cavity of the pilot air hole 41 of the main valve 4 and the outlet pressure. The spring force of the return spring 33 overcomes the frictional force of the moving iron core 31 and the frictional force of the spring energy storage ring 43, and pushes the main valve 4 to contact the sealing surface of the housing 5.

[0062] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. An electromagnetic control structure for a high-pressure bottle valve, characterized in that: include: A valve seat (1) is mounted on an outer wall of a shell (5) of a gas cylinder, the shell (5) being provided with a gas cylinder outlet (51), the valve seat (1) comprising a first accommodating cavity and a second accommodating cavity which are connected to each other; A static iron core assembly (2) installed in the first accommodating cavity; A moving iron core assembly (3) movably mounted in the first accommodating cavity and cooperating with the stationary iron core assembly (2); A main valve (4) is movably mounted in the second accommodating chamber, a pilot air hole (41) is provided along the main valve (4), the pilot air hole (41) comprises a first end and a second end which are arranged opposite to each other, and end surfaces of the main valve (4) located at the first end and the second end of the pilot air hole (41) are respectively capable of sealingly cooperating with the gas cylinder outlet (51) and the moving iron core assembly (3); The moving iron core assembly (3) is capable of moving along the first accommodating cavity to open or close the second end of the pilot air hole (41); When the second end of the pilot air hole (41) is opened, the main valve (4) can move along the second accommodating cavity to open the gas cylinder outlet (51).

2. The electromagnetic control structure for a high-pressure bottle valve according to claim 1, characterized in that: The static iron core assembly (2) comprises a static iron core (21) which is interference-fitted with the first accommodating cavity and abuts against the bottom wall of the first accommodating cavity.

3. The electromagnetic control structure for a high-pressure bottle valve according to claim 2, characterized in that: The moving iron core assembly (3) comprises a moving iron core (31), a stopper (32) installed in an inner hole of the moving iron core (31), and a return spring (33) respectively abutting against the stopper (32) and the stationary iron core (21), wherein the return spring (33) is used to provide a force for moving the moving iron core (31) away from the stationary iron core (21).

4. The electromagnetic control structure for a high-pressure bottle valve according to claim 3, characterized in that: One end of the valve seat (1) away from the housing (5) is threadedly connected to a cover cap (6), and a first sealing ring (8) in contact with the valve seat (1) is arranged inside the cover cap (6).

5. The electromagnetic control structure for a high-pressure bottle valve according to claim 3, characterized in that: A sealing gasket (34) is installed on the bottom wall of the inner hole of the moving iron core (31); the stopper (32) abuts against the sealing gasket (34) via the return spring (33); a sealing hole seat (311) is extended from the bottom wall of the inner hole of the moving iron core (31) toward the main valve (4); and a sealing end head (42) capable of sealingly cooperating with the sealing hole seat (311) and abutting against the sealing gasket (34) is provided on one end of the main valve (4) facing the moving iron core (31).

6. The electromagnetic control structure for a high-pressure bottle valve according to claim 5, characterized in that: The sealing hole seat (311) and the sealing end head (42) are matched through a conical surface seal.

7. The electromagnetic control structure for a high-pressure bottle valve according to claim 1, characterized in that: It also comprises a clamping nut (7), the outer side wall of the housing (5) is provided with a mounting cavity, and the valve seat (1) is clamped in the mounting cavity by the clamping nut (7).

8. The electromagnetic control structure for a high-pressure bottle valve according to claim 7, characterized in that: A second sealing ring (9) is provided between the valve seat (1) and the bottom wall of the installation cavity.

9. The electromagnetic control structure for a high-pressure bottle valve according to claim 1, characterized in that: The main valve (4) is provided with a spring energy storage ring (43) on its outer sleeve, which abuts against the inner wall of the second accommodating chamber.

10. The electromagnetic control structure for a high-pressure bottle valve according to claim 9, characterized in that: The outer sleeve of the main valve (4) is provided with a clamp (44) for limiting the spring energy storage ring (43).

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