CN218510249U

CN218510249U - One-way valve for fuel cell automobile hydrogen system

Info

Publication number: CN218510249U
Application number: CN202222129230.0U
Authority: CN
Inventors: 姚久永; 胡东海
Original assignee: Shanghai Zheshen New Energy Technology Co ltd
Current assignee: Shanghai Zheshen New Energy Technology Co ltd
Priority date: 2022-08-11
Filing date: 2022-08-11
Publication date: 2023-02-21
Anticipated expiration: 2032-08-11

Abstract

The utility model discloses a fuel cell car check valve for hydrogen system, including valve body, two coupling nut, spring holder, valve body one end with the connection can be dismantled to spring holder one end, its characterized in that: the connecting nuts are arranged at the ends, far away from each other, of the valve body and the spring seat; the connecting positions of the connecting nut, the valve body and the spring seat are respectively provided with a front clamping sleeve and a rear clamping sleeve, and the rear clamping sleeves are tightly contacted with the inner walls of the valve body and the spring seat along with the screwing of the connecting nut so as to realize metal sealing; the air discharge amount of the metal seal is small, the influence on the vacuum degree is reduced, a better sealing effect can be achieved, and the requirements of an ultrahigh vacuum system are met; and secondly, the metal seal can achieve the effects of high temperature resistance and corrosion resistance, and can realize normal operation in high-temperature environment and corrosive environment.

Description

One-way valve for fuel cell automobile hydrogen system

Technical Field

The utility model relates to a check valve field especially relates to a fuel cell car is check valve for hydrogen system.

Background

In order to deal with the increasingly serious energy crisis and environmental problems, the development and utilization of clean energy are concerned more and more by various social circles, wherein hydrogen only generates water after being combusted, so that the hydrogen is known as the cleanest fuel, and the application of the hydrogen is fully expected in the industry; in a hydrogenation apparatus or a hydrogen supply system, a check valve is widely used to control the flow direction of hydrogen and prevent the hydrogen from flowing backward.

In the prior art, a sealing ring is a structure for ensuring the sealing of the one-way valve, and the existing sealing ring is mostly made of rubber materials and is easy to damage or add impurities, so that the sealing property of the one-way valve is reduced; meanwhile, in a high-temperature or corrosive environment, most of the rubber sealing rings can be damaged, so that the one-way valve breaks down.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a one-way valve for a hydrogen system of a fuel cell automobile.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the valve comprises a valve body, two connecting nuts and a spring seat, wherein one end of the valve body is detachably connected with one end of the spring seat, and the connecting nuts are arranged at the ends, far away from each other, of the valve body and the spring seat;

and the connecting position of the connecting nut, the valve body and the spring seat is provided with a front clamping sleeve and a rear clamping sleeve, and the rear clamping sleeve is in close contact with the inner walls of the valve body and the spring seat along with the screwing of the connecting nut so as to realize metal sealing.

As a further description of the above technical solution: the spring seat is half embedded in the valve body, and a first sealing structure is arranged at the joint of the valve body and the spring seat.

As a further description of the above technical solution: the valve body is connected with the spring seat to form a hollow cavity, and a valve core, a valve core seat and a spring are arranged in the cavity.

As a further description of the above technical solution: the valve core seat is used for fixing the position of the valve core, and one end of the spring is connected with the valve core.

As a further description of the above technical solution: one end of the valve core seat is arranged on the inner wall of the end face of the valve body, and one end of the spring is arranged on the inner wall of the end face of the spring seat.

As a further description of the above technical solution: the valve core seat is fixedly arranged on the inner wall of the valve body, and a sealing structure II is arranged at the joint of the valve core seat and the valve core.

As a further description of the above technical solution: the first sealing structure and the second sealing structure are composed of metal sealing rings and sealing gaskets, and the sealing gaskets are used for strengthening sealing and protecting the metal sealing rings.

As a further description of the above technical solution: the front clamping sleeve is used for clamping the valve body and the spring seat.

As a further description of the above technical solution: the rear clamping sleeve is used for clamping the connecting nut.

As a further description of the above technical solution: the front clamping sleeve is matched with the rear clamping sleeve, so that the connecting nut is respectively clamped with the valve body and the spring seat.

The utility model discloses following beneficial effect has:

1. the utility model discloses a preceding cutting ferrule forms metal seal with the back cutting ferrule, and preceding cutting ferrule and valve body and spring holder chucking, back cutting ferrule and coupling nut chucking make the junction airtight more through the cooperation between preceding cutting ferrule and the back cutting ferrule again, and the hydrogen that has significantly reduced overflows at the circulation in-process.

2. The utility model discloses an adopt metal seal, make the volume of releasing significantly reduce for vacuum system's vacuum improves, and sealed effect is better.

3. The utility model adopts metal sealing, can continuously work in high temperature environment and keep good stability; meanwhile, the paint has better resistance and scouring resistance to corrosive environment and the like, and achieves the effects of high temperature resistance and corrosion resistance.

Drawings

Fig. 1 is a perspective view of a check valve for a hydrogen system of a fuel cell vehicle according to the present invention;

fig. 2 isbase:Sub>A sectional view taken alongbase:Sub>A-base:Sub>A in fig. 1.

Illustration of the drawings:

1. a valve body; 2. a valve core; 3. a valve core seat; 4. a connecting nut; 5. a spring seat; 6. a spring; 7. a front ferrule; 8. a rear ferrule; 9. a first sealing structure; 10. and a second sealing structure.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do 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 thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-2, the present invention provides an embodiment: the valve comprises a valve body 1, two connecting nuts 4 and a spring seat 5, wherein one end of the valve body 1 is connected with one end of the spring seat 5, the connecting nut 4 is arranged at one end of the valve body 1, one end of the spring seat 5 is provided with the connecting nut 4, the connecting nut 4 internally comprises a front clamping sleeve 7 and a rear clamping sleeve 8, and the front clamping sleeve 7 and the rear clamping sleeve 8 are matched to form metal seal so as to seal the connecting position; the air discharge amount of the metal seal is small, the influence on the vacuum degree is reduced, a better sealing effect can be achieved, and the requirements of an ultrahigh vacuum system are met; and secondly, the metal seal can achieve the effects of high temperature resistance and corrosion resistance, and can realize normal operation in a high-temperature environment and a corrosion environment.

Referring to fig. 2, coupling nut 4 is connected with valve body 1 and spring holder 5 through preceding cutting ferrule 7 and back cutting ferrule 8, and when current cutting ferrule 7 and back cutting ferrule 8 received airflow pressure, mutual extrusion fit formed metal seal at the hookup location, the volume of spilling of the hydrogen that has significantly reduced, when improving the vacuum, also safer. The valve core 2 is arranged in the cavity formed by the valve body 1 and the spring seat 5, and the valve core 3, the valve core 2 and the spring 6 are communicated when hydrogen flows into the cavity from the direction of the valve core seat 3, so that the hydrogen flows smoothly; when hydrogen flowed into the cavity from 6 directions of spring, spring 6 drove case 2 and case seat and closes the valve, and gaseous unable outflow has formed the effect of ending, and

case

2 and 3 junctions of case seat are provided with two 10 of seal structure for metal seal circle, and two 10 of seal structure both make the connection of case 2 and case seat 3 airtight more, also make the position of case 2 more firm simultaneously, avoid case 2 to take place the skew in the course of the work position.

The working principle is as follows: when gas enters an inner cavity formed by the valve body 1 and the spring seat 5 from the position of the connecting nut 4 through the valve core 2, the pressure of the gas flow can compress the spring 6, the spring 6 drives the valve core 2 and the valve core seat 3 to move, the inner cavity is communicated, so that the gas can flow out from the position of the other connecting nut 4, and the gas flow is realized; when the gas flows reversely, the pressure of the gas flow stretches the spring 6, and simultaneously, the pressure of the gas flow and the spring force generated by the spring 6 act on the valve core 2 and the valve core seat 3, so that the valve core seat 3 is tightly contacted with the valve body 1 to achieve the sealing effect, thereby cutting off the circulation of the gas and forming the stopping effect; when the hydrogen gas flow flows through the connecting nut 4, the cooperation between the front clamping sleeve 7 and the rear clamping sleeve 8 is tighter due to the acting force of the gas flow, the overflow amount of the hydrogen in the flowing process is reduced due to the formed metal seal, higher vacuum degree is realized, the use process is safer, and the possibility of the overflow hydrogen explosion is reduced.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims

1. The utility model provides a fuel cell car check valve for hydrogen system, includes valve body (1), two coupling nut (4), spring holder (5), valve body (1) one end with spring holder (5) one end can be dismantled and be connected its characterized in that: the connecting nuts (4) are arranged at the ends, far away from each other, of the valve body (1) and the spring seat (5);

the connecting nut (4) and the connecting position of the valve body (1) and the spring seat (5) are both provided with a front clamping sleeve (7) and a rear clamping sleeve (8), and the rear clamping sleeve (8) is in close contact with the inner walls of the valve body (1) and the spring seat (5) along with the screwing of the connecting nut (4) so as to realize metal sealing.

2. The check valve for a fuel cell vehicle hydrogen system according to claim 1, characterized in that: the spring seat (5) is embedded into the valve body (1) in a half mode, and a first sealing structure (9) is arranged at the joint of the valve body (1) and the spring seat (5).

3. The check valve for a fuel cell vehicle hydrogen system according to claim 2, characterized in that: the valve body (1) is connected with the spring seat (5) to form a hollow cavity, and the cavity is internally provided with the valve core (2), the valve core seat (3) and the spring (6).

4. The check valve for a fuel cell vehicle hydrogen system according to claim 3, characterized in that: the valve core seat (3) is used for fixing the position of the valve core (2), and one end of the spring (6) is connected with the valve core (2).

5. The check valve for a fuel cell vehicle hydrogen system according to claim 4, characterized in that: one end of the valve core seat (3) is arranged on the inner wall of the end face of the valve body (1), and one end of the spring (6) is arranged on the inner wall of the end face of the spring seat (5).

6. The check valve for a fuel cell vehicle hydrogen system according to claim 5, characterized in that: the valve core seat (3) is fixedly arranged on the inner wall of the valve body (1), and a sealing structure II (10) is arranged at the joint of the valve core seat (3) and the valve core (2).

7. The check valve for a fuel cell vehicle hydrogen system according to claim 6, characterized in that: the first sealing structure (9) and the second sealing structure (10) are composed of metal sealing rings and sealing gaskets, and the sealing gaskets are used for strengthening sealing and protecting the metal sealing rings.

8. The check valve for a fuel cell vehicle hydrogen system according to claim 1, characterized in that: the front clamping sleeve (7) is used for clamping the valve body (1) and the spring seat (5).

9. The check valve for a fuel cell vehicle hydrogen system according to claim 1, characterized in that: the rear clamping sleeve (8) is used for clamping the connecting nut (4).

10. The check valve for a fuel cell vehicle hydrogen system according to claim 1, characterized in that: the front clamping sleeve (7) is matched with the rear clamping sleeve (8) to enable the connecting nut (4) to be clamped with the valve body (1) and the spring seat (5) respectively.