CN116045040A

CN116045040A - Check valve and hydrogen storage system

Info

Publication number: CN116045040A
Application number: CN202111264718.8A
Authority: CN
Inventors: 李宁; 王东雨; 李家豪
Original assignee: Weishi Energy Technology Co Ltd
Current assignee: Weishi Energy Technology Co Ltd
Priority date: 2021-10-28
Filing date: 2021-10-28
Publication date: 2023-05-02

Abstract

The invention relates to the technical field of hydrogen storage systems, and particularly discloses a one-way valve and a hydrogen storage system. The valve seat is provided with a through hole, the valve core is arranged in the through hole, the valve core divides the through hole into a first cavity and a second cavity, and the valve core comprises a first positioning surface and a second positioning surface; the fixing piece is positioned in the first cavity and fixedly connected with the valve seat, and the fixing piece is propped against the second locating surface along the axial direction of the through hole so as to tightly prop the first locating surface against the inner wall of the through hole, so that the stable position of the valve core can be ensured, the valve core is configured to only allow a fluid medium to flow from the first cavity to the second cavity through the valve core, and external dust or water can be prevented from flowing into the safety discharge pipeline through the valve core so as to ensure the reliability of the hydrogen storage safety discharge system.

Description

Check valve and hydrogen storage system

Technical Field

The invention relates to the technical field of hydrogen storage systems, in particular to a one-way valve and a hydrogen storage system.

Background

The vehicle-mounted hydrogen storage system is characterized in that safety relief pipelines are required to be arranged on the pressure reducing valve and the bottle valve, so that the gas bottle and the pressure reducing valve can rapidly discharge hydrogen to a safety part outside a vehicle body through the safety relief pipelines when danger occurs, the safety relief pipelines must ensure smoothness of the pipelines, and the safety relief pipelines cannot be blocked by external dirt and rainwater so as to avoid the risk of safety relief.

In the prior art, an elastic protective cap is sleeved at the tail end of the pipeline, but the protective cap is easy to fall off under the action of air pressure accumulated in the pipeline, accumulated hydrogen generated in the system cannot be removed in time, meanwhile, the elasticity of the protective cap is easily influenced by external environment factors, the condition of incomplete installation and looseness easily occurs after long-time use, and the reliability of the hydrogen storage system cannot be guaranteed.

Disclosure of Invention

The invention aims at: the one-way valve and the hydrogen storage system have higher reliability.

In one aspect, the present invention provides a one-way valve comprising:

a valve seat having a through hole;

a valve core disposed within the through-hole and separating the through-hole into a first cavity and a second cavity, the valve core configured to allow only fluid medium to flow from the first cavity to the second cavity through the valve core, the valve core including a first locating surface and a second locating surface;

and the fixing piece is positioned in the first cavity and fixedly connected with the valve seat, and the fixing piece is propped against the second positioning surface along the axial direction of the through hole so as to tightly prop the first positioning surface against the inner wall of the through hole.

As a preferable mode of the one-way valve, one of the cavity wall of the first cavity and the outer peripheral surface of the fixing member is provided with a click-on protrusion which abuts against the other of the cavity wall of the first cavity and the outer peripheral surface of the fixing member;

the fixing piece is provided with a communication hole communicated with the first cavity, the valve core is provided with a flow passage, and the flow passage is communicated with the communication hole and selectively communicated with the second cavity.

As a preferable technical scheme of the one-way valve, one of the cavity wall of the first cavity and the outer peripheral surface of the fixing piece is provided with a clamping groove, and the other one of the cavity wall of the first cavity and the outer peripheral surface of the fixing piece is provided with a clamping protrusion which is clamped in the clamping groove.

As the preferable technical scheme of check valve, the card protruding have spacing face and with the spacing face that the angle set up is personally submitted to the guide surface, the guide surface is relative spacing face is close to the case, spacing face perpendicular to the central line of first chamber, just spacing face with the cell wall laminating of draw-in groove.

As a preferable technical scheme of the one-way valve, the valve core is made of an elastic material and comprises a cylindrical valve core body and a one-way conduction part arranged at one end of the valve core body, and the first positioning surface and the second positioning surface are arranged on the valve core body;

the unidirectional conduction part comprises a plurality of valve clacks which are uniformly distributed along the circumferential direction of the valve core body, a valve port is formed between two adjacent valve clacks, the length direction of the valve port is perpendicular to the axial direction of the valve core body, and the valve port is in a normally closed state.

As the preferable technical scheme of the one-way valve, the number of the valve clacks is at least three, and one ends of the valve ports, which are close to the center line of the valve core body, are mutually communicated.

As a preferable technical scheme of the one-way valve, the second positioning surface is a conical surface.

As a preferable technical scheme of the one-way valve, the outer circumferential surface of the valve seat is provided with external threads.

As a preferable technical scheme of the one-way valve, the outer circumferential surface of the valve seat is provided with a clamping part matched with a spanner.

In another aspect, the present invention provides a hydrogen storage system, which includes a safety relief pipeline and the one-way valve in any one of the above schemes, the valve seat is mounted on the safety relief pipeline, and the first cavity is communicated with the safety relief pipeline.

The beneficial effects of the invention are as follows:

the invention provides a one-way valve and a hydrogen storage system. The valve seat is provided with a through hole, the valve core is arranged in the through hole, the valve core divides the through hole into a first cavity and a second cavity, and the valve core comprises a first positioning surface and a second positioning surface; the fixing piece is positioned in the first cavity and fixedly connected with the valve seat, and the fixing piece is propped against the second locating surface along the axial direction of the through hole so as to tightly prop the first locating surface against the inner wall of the through hole, so that the stable position of the valve core can be ensured, the valve core is configured to only allow a fluid medium to flow from the first cavity to the second cavity through the valve core, and external dust or water can be prevented from flowing into the safety discharge pipeline through the valve core so as to ensure the reliability of the hydrogen storage safety discharge system.

Drawings

FIG. 1 is a schematic diagram of a check valve according to an embodiment of the present invention;

FIG. 2 is a schematic view of a part of the structure of a check valve according to an embodiment of the present invention;

FIG. 3 is a schematic diagram showing a structure of a valve core of a check valve according to an embodiment of the present invention;

FIG. 4 is a second schematic structural diagram of a valve element of the check valve according to the embodiment of the present invention;

FIG. 5 is a schematic diagram showing a valve seat of a check valve according to an embodiment of the present invention;

FIG. 6 is a second schematic structural view of a valve seat of the check valve according to the embodiment of the present invention;

FIG. 7 is a schematic structural view of a fixing member of a check valve according to an embodiment of the present invention;

FIG. 8 is a schematic view of a part of a fixing member of a check valve according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of a check valve and a relief vent in an embodiment of the invention;

fig. 10 is a schematic structural view of a check valve, a relief vent line, and a seal according to an embodiment of the invention.

In the figure:

1. a valve seat; 11. a first chamber; 12. a second chamber; 13. a limit protrusion; 14. a clamping groove; 15. an external thread; 16. a clamping part;

2. a valve core; 21. a valve core body; 211. a first positioning surface; 212. a second positioning surface; 213. a housing; 214. a flange; 22. a unidirectional conduction portion; 221. a valve flap; 222. a valve port; 2211. a valve plate; 2212. a first edge; 2213. a second side; 2214. a third side;

3. a fixing member; 31. a front section; 32. a limiting section; 33. a tail section; 331. a clamping protrusion; 3311. a limiting surface; 3312. a guide surface; 34. a step surface;

4. a nut;

5. a safety vent line;

6. and a seal.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first location" and "second location" are two distinct locations and wherein the first feature is "above," "over" and "over" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is level above the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

The embodiment provides a one-way valve, which can be applied to a vehicle-mounted hydrogen storage system, in particular to a safety relief pipeline 5 of a pressure reducing valve and/or a bottle valve of the vehicle-mounted hydrogen storage system, so as to ensure that the bottle valve and/or the pressure reducing valve can rapidly discharge hydrogen to a safety part outside a vehicle body through the safety relief pipeline 5 when a danger occurs, thereby ensuring driving safety.

Specifically, as shown in fig. 1 and 2, the check valve includes a valve seat 1 and a valve body 2.

The valve seat 1 is used for being installed on the safety relief pipeline 5, the valve seat 1 is provided with a through hole, the valve core 2 is arranged in the through hole, and the through hole comprises a first cavity 11 and a second cavity 12 which are positioned at two sides of the valve core 2 along the center line direction of the through hole; the valve cartridge 2 is configured to allow only fluid medium to flow from the first chamber 11 to the second chamber 12 via the valve cartridge 2, the valve cartridge 2 preventing fluid medium from the second chamber 12 from flowing through the valve cartridge 2 to the first chamber 11. When the valve seat 1 is mounted on the safety relief pipeline 5, the first cavity 11 is communicated with the safety relief pipeline 5, and the second cavity 12 is communicated with the external atmosphere, so that external dust or water can be prevented from flowing into the safety relief pipeline 5 through the valve core 2, and meanwhile, the hydrogen can be discharged out of the safety relief pipeline 5 through the valve core 2. The fluid medium in this embodiment is specifically hydrogen in the safety vent 5 and external water, and in other embodiments, the fluid medium may be other gases or liquids.

It will be appreciated that the valve element 2 may be sealed against the inner wall of the through bore to prevent gas in the first chamber 11 from flowing between the valve element 2 and the inner wall of the through bore to the second chamber 12. In this embodiment, the valve core 2 has a first positioning surface 211, and the first positioning surface 211 can be attached to the inner wall of the through hole, so as to realize sealing between the valve core 2 and the inner wall of the through hole. In other embodiments, the valve core 2 may also be disposed in the through hole in an interference manner, so as to achieve a seal between the valve core 2 and the inner wall of the through hole.

In order to realize the sealing between the valve core 2 and the inner wall of the through hole, in this embodiment, the inner wall of the through hole of the valve seat 1 is convexly provided with a limiting protrusion 13, and the first positioning surface 211 is abutted with the limiting protrusion 13. In other embodiments, an annular protrusion structure may be disposed on the valve core 2, an annular groove structure is disposed on the inner wall of the through hole, and the first positioning surface 211 is located on the protrusion structure and is inserted into the groove structure through the protrusion structure, so that the first positioning surface 211 and the side wall of the groove structure are bonded.

The limiting protrusion 13 may be an annular block protruding from the inner wall of the through hole, or a plurality of protruding blocks protruding from the inner wall of the through hole and arranged along the circumferential direction of the through hole at intervals. Specifically, in this embodiment, the limiting protrusion 13 is an annular block protruding from the inner wall of the through hole, and along the direction of the center line of the through hole, one end of the annular block is flush with one end of the through hole, and the other end of the annular block is located in the through hole, that is, the through hole is a stepped hole.

In order to ensure the sealing effect between the valve core 2 and the inner wall of the through hole, the one-way valve further comprises a fixing piece 3, wherein the fixing piece 3 is arranged in the first cavity 11 and fixedly connected with the valve seat 1, and the fixing piece 3 is abutted against the valve core 2 along the axial direction of the through hole so as to tightly abut against the first positioning surface 211 of the valve core 2 and the inner wall of the through hole. And mounting 3 and base 1 fixed connection to guarantee that the relative position of mounting 3 and base 1 is stable, and then guarantee to compress tightly effect and sealed effect.

Specifically, the spool 2 also has a second positioning surface 212. Along the axial direction of the through hole, the fixing piece 3 is abutted with the second positioning surface 212, and the position of the valve core 2 in the through hole can be limited by the fixing piece 3 and the limiting protrusion 13. In this embodiment, the first positioning surface 211 and the second positioning surface 212 are axially spaced along the through hole, and the valve core 2 is pressed against the limiting protrusion 13 by the fixing member 3, so that an end face seal can be formed between the second positioning surface 212 of the valve core 2 and the fixing member 3, and meanwhile, an end face seal can also be formed between the first positioning surface 211 of the valve core 2 and the limiting protrusion 13; particularly, the end face seal formed between the first positioning surface 211 of the valve core 2 and the limiting protrusion 13 can prevent fluid media in the first cavity 11 and the second cavity 12 from communicating between the valve core 2 and the side wall of the through hole, and ensure the unidirectional sealing effect of the one-way valve.

It should be noted that the fixture 3 does not affect the flow of fluid medium from the first chamber 11 to the second chamber 12 via the non-return valve 2. Specifically, in the present embodiment, the holder 3 has a communication hole communicating with the first chamber 11, and the spool 2 has a flow passage communicating with the communication hole and selectively communicating with the second chamber 12.

Compared with the protective cap in the prior art, the check valve provided by the embodiment has the advantages that the position of the valve core 2 can be kept stable under the limitation of the valve seat 1 and the fixing piece 3, the position of the valve core 2 cannot be influenced by the hydrogen pressure in the safety relief pipeline 5, the influence of environmental factors is avoided, and the reliability of the hydrogen storage safety discharge system can be ensured.

As shown in fig. 2 and 3, the second positioning surface 212 is a conical surface. Accordingly, the surface of the fixing member 3 attached to the second positioning surface 212 is also a conical surface. So set up, when mounting 3 to disk seat 1, second locating surface 212 plays the guide effect to can guarantee the concentricity of mounting 3 and case 2, in order to improve the stability of product.

In this embodiment, the valve core 2 is made of an elastic material, preferably integrally injection molded by rubber, or other elastic plastic materials can be selected according to the requirement. Therefore, after the valve core 2 is attached to the valve seat 1 and the fixing piece 3, the sealing effect of sealing the two end surfaces between the second positioning surface 212 of the valve core 2 and the fixing piece 3 and between the first positioning surface 211 of the valve core 2 and the limiting protrusion 13 can be ensured to be stable. Preferably, the outer circumferential surface of the portion of the valve core 2 between the first positioning surface 211 and the second positioning surface 212 may also be bonded to the inner wall of the through hole, so that the sealing effect may be further enhanced, and thus, gaps may be avoided between the valve core 2 and the valve seat 1, and between the valve core 2 and the fixing member 3. In other embodiments, the spool 2 may be replaced with a mechanical spool 2.

As shown in fig. 3 and 4, the valve element 2 includes a valve element body 21 having a cylindrical shape and a unidirectional conducting portion 22 provided at one end of the valve element body 21, and both the first positioning surface 211 and the second positioning surface 212 are provided at the valve element body 21, specifically, the valve element body 21 includes a cylindrical housing 213, and a flange 214 having an annular shape located at an outer peripheral surface protruding from one end of the housing 213 in the axial direction. The unidirectional conducting portion 22 is disposed at the other axial end of the housing 213, and along the axial direction of the housing 213, the first positioning surface 211 is disposed at one axial end of the flange, and the second positioning surface 212 is an end surface of the housing 213 away from the unidirectional conducting portion 22.

The unidirectional conduction portion 22 includes a plurality of valve flaps 221 uniformly distributed along the circumferential direction of the valve core body 21, and a valve port 222 is formed between two adjacent valve flaps 221, and the length direction of the valve port 222 and the axial direction of the valve core body 21 form an included angle, where in this embodiment, the included angle is specifically 90 °, and in other embodiments, the valve port 222 may be set as required.

The valve port 222 is normally closed. Specifically, the valve clack 221 includes two valve plates 2211 connected at an included angle, the two valve plates 2211 are respectively a first valve plate and a second valve plate, the first valve plate and the second valve plate are all triangular sheet bodies, the first valve plate and the second valve plate are connected through a first edge 2212, the first edge 2212 is connected with the inner surface of the housing 213 of the valve core body 21, the first valve plate and the second valve plate are all protruded towards the inside of the cylinder, and in two adjacent valve clacks 221, the second edge 2213 of the first valve plate of one valve clack 221 is connected with the second edge 2213 of the second valve plate 2213 of the other valve clack 221, and the third edge 2214 of the first valve plate is partially connected with the third edge 2214 of the second valve plate to form the valve port 222. Because the valve core 2 is made of elastic materials, the third side 2214 of the first valve plate of one valve clack 221 and the third side 2214 of the second valve plate of the other valve clack 221 always have mutually attached movement tendencies, and the two sides can be attached, so that when the valve core 2 does not work, the valve port 222 can be kept normally closed.

When the check valve is installed on the safety relief pipeline 5, when the hydrogen gas pressure in the first cavity 11 is greater than the external atmospheric pressure, the pressure difference acts on the inner surfaces of the two valve plates 2211 of each valve plate 221, and the two valve plates 2211 of each valve plate 221 are caused to be close to each other, so that the valve port 222 positioned between the two adjacent valve plates 221 is expanded, the valve port 222 is opened, and the hydrogen gas in the first cavity 11 can be discharged into the second cavity 12; when the hydrogen pressure in the first chamber 11 is smaller than the external atmospheric pressure, the pressure difference acts on the outer surfaces of the two valve plates 2211 of each valve plate 221, so that the two valve plates 2211 of each valve plate 221 are far away from each other, the valve port 222 between the two adjacent valve plates 221 is further tightened, the valve port 222 is more firmly closed, and external dust or water can be prevented from entering the first chamber 11 from the valve port 222 through the second chamber 12.

In this embodiment, the number of the valve flaps 221 is not limited, the number of the valve flaps 221 may be two, at this time, the one-way conducting portion 22 is in a duckbill structure, the number of the valve flaps 221 may be at least three, and one ends of the valve ports 222 near the center line of the valve core body 21 are mutually communicated. Here, in the present embodiment, a scheme in which the number of the valve flaps 221 is four is exemplarily given, and four valve ports 222 are arranged in a cross shape.

As shown in fig. 5, the outer peripheral surface of the valve seat 1 is provided with external threads 15 so that the valve seat 1 and the relief line 5 can be connected by screw-fitting. Further, the outer peripheral surface of the valve seat 1 is provided with a clamping portion 16 for engagement with a wrench. It is possible to facilitate screwing of the valve seat 1. Wherein the clamping portion 16 comprises at least two clamping surfaces arranged in parallel and spaced apart relation. In this embodiment, the clamping portion 16 is exemplarily shown to include six clamping surfaces, and the six clamping surfaces are in a regular hexagon overall.

As shown in fig. 5 to 8, in order to achieve stable connection of the fixing member 3 and the valve seat 1, the present embodiment exemplarily shows that a catching protrusion 331 is provided on the outer circumferential surface of the fixing member 3, and the fixing connection of the fixing member 3 and the valve seat 1 is achieved by abutting the catching protrusion 331 against the cavity wall of the first cavity 11. Wherein, as shown in fig. 5, the clamping protrusion 331 and the cavity wall of the first cavity 11 can be in interference fit; as shown in fig. 6, the clamping protrusion 331 may be in clamping fit with the cavity wall of the first cavity 11, and when in clamping fit, a clamping groove 14 may be provided on the cavity wall of the first cavity 11, and the fixing member 3 is clamped in the clamping groove 14 through the clamping protrusion 331 so as to be mounted on the valve seat 1. In other embodiments, the locking protrusion 331 may be disposed on the wall of the first cavity 11, and the locking protrusion 331 abuts against the outer peripheral surface of the fixing member 3.

As an alternative, the fastening element 3 can also be screwed to the valve seat 1, as can a stable connection between the fastening element 3 and the valve seat 1.

Alternatively, as shown in fig. 8, the clamping protrusion 331 has a limiting surface 3311 and a guiding surface 3312 disposed at an angle to the limiting surface 3311, the guiding surface 3312 is close to the valve core 2 relative to the limiting surface 3311, the limiting surface 3311 is perpendicular to the center line of the first cavity 11, and the limiting surface 3311 is attached to the groove wall of the clamping groove 14. So set up, the longitudinal cross-section of card protruding 331 is triangle-shaped, can guarantee through the cell wall laminating of locating part and draw-in groove 14 that the joint effect of card protruding 331 and draw-in groove 14 is stable, through setting up guide surface 3312, then is convenient for pack into first intracavity 11 with mounting 3 from the opening in first chamber 11.

In this embodiment, the fixing member 3 includes a front section 31, a limit section 32, and a rear section 33, which are sequentially connected in the axial direction thereof. Wherein, the front section 31 is inserted into the valve core body 21 of the valve core 2, the outer peripheral surface of the front section 31 is attached to the inner wall of the valve core body 21, the outer peripheral surface of the limiting section 32 is conical and attached to the second positioning surface 212, the tail section 33 is located in the first cavity 11, and the clamping protrusion 331 is disposed on the tail section 33. Specifically, the outer diameter of the front section 31 is smaller than the outer diameter of the tail section 33, the minimum outer diameter of the limit section 32 is equal to the outer diameter of the front section 31, and the maximum outer diameter of the limit section 32 is smaller than the outer diameter of the tail section 33, so that a step surface 34 is formed between the limit section 32 and the tail section 33, and the step surface 34 is abutted with the end surface of the valve core 2, so that the limit effect on the valve core 2 can be further enhanced.

As shown in fig. 9 and 10, the present embodiment further provides a hydrogen storage system, which includes the safety relief line 5 and the check valve in the above-described scheme, the valve seat 1 is mounted on the safety relief line 5, and the first chamber 11 is in communication with the safety relief line 5.

Specifically, the hydrogen storage system further comprises a nut 4 and a sealing member 6, wherein the nut 4 is arranged on the safety relief pipeline 5, the nut 4 is in threaded connection with the valve seat 1, and the sealing member 6 is at least partially positioned between the valve seat 1 and the safety relief pipeline 5. Through the threaded fit of the valve seat 1 and the nut 4, the check valve is convenient to detach, and the tightness between the check valve and the safety relief pipeline 5 can be ensured through the arrangement of the sealing piece 6.

It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.

Claims

1. A one-way valve, comprising:

a valve seat (1), the valve seat (1) having a through hole;

a valve core (2), the valve core (2) being disposed within the through hole and dividing the through hole into a first cavity (11) and a second cavity (12), the valve core (2) being configured to allow only fluid medium to flow from the first cavity (11) to the second cavity (12) via the valve core (2), the valve core (2) comprising a first positioning surface (211) and a second positioning surface (212);

and the fixing piece (3), the fixing piece (3) is positioned in the first cavity (11) and fixedly connected with the valve seat (1), and the fixing piece (3) is propped against the second positioning surface (212) along the axial direction of the through hole so as to tightly prop the first positioning surface 211 against the inner wall of the through hole.

2. The one-way valve according to claim 1, characterized in that one of the cavity wall of the first cavity (11) and the outer peripheral surface of the fixture (3) is provided with a click-on protrusion (331), the click-on protrusion (331) abutting against the other of the cavity wall of the first cavity (11) and the outer peripheral surface of the fixture (3);

the fixing member (3) has a communication hole communicating with the first chamber (11), and the valve element (2) has a flow passage communicating with the communication hole and selectively communicating with the second chamber (12).

3. A one-way valve according to claim 2, characterized in that one of the cavity wall of the first cavity (11) and the outer circumferential surface of the fixing member (3) is provided with a clamping groove (14), the other one of the two is provided with a clamping protrusion (331), and the clamping protrusion (331) is clamped in the clamping groove (14).

4. A one-way valve according to claim 3, wherein the clamping protrusion (331) has a limiting surface (3311) and a guiding surface (3312) disposed at an angle to the limiting surface (3311), the guiding surface (3312) is close to the valve core (2) relative to the limiting surface (3311), the limiting surface (3311) is perpendicular to a center line of the first cavity (11), and the limiting surface (3311) is attached to a groove wall of the clamping groove (14).

5. The one-way valve according to claim 1, wherein the valve element (2) is made of an elastic material, the valve element (2) includes a valve element body (21) having a cylindrical shape and a one-way conduction portion (22) provided at one end of the valve element body (21), and the first positioning surface (211) and the second positioning surface (212) are provided at the valve element body (21);

the unidirectional conduction portion (22) comprises a plurality of valve clacks (221) which are uniformly distributed along the circumferential direction of the valve core body (21), a valve port (222) is formed between every two adjacent valve clacks (221), the length direction of the valve port (222) is perpendicular to the axial direction of the valve core body (21), and the valve port (222) is in a normally closed state.

6. The one-way valve according to claim 5, wherein the number of the valve flaps (221) is at least three, and one ends of the plurality of valve ports (222) near the center line of the valve body (21) communicate with each other.

7. The one-way valve according to any one of claims 1-6, wherein the second positioning surface (212) is a conical surface.

8. A one-way valve according to any one of claims 1-6, characterized in that the inner wall of the through hole is convexly provided with a limit projection (13), and that the limit projection (13) abuts against the first positioning surface (211) in the direction of the center line of the through hole.

9. A one-way valve according to any one of claims 1-6, characterized in that the outer circumferential surface of the valve seat (1) is provided with an external thread (15), and that the outer circumferential surface of the valve seat (1) is provided with a clamping portion (16) for cooperation with a wrench.

10. A hydrogen storage system, characterized by comprising a safety relief line (5) and a one-way valve according to any of claims 1-9, said valve seat (1) being mounted to said safety relief line (5) and said first chamber (11) being in communication with said safety relief line (5).