A hydrogen storage gas valve

Abstract

The present invention relates to the technical field of hydrogen storage, and particularly relates to a gas valve for hydrogen storage, comprising: a valve body provided with a spool cavity, a valve seat cavity, and a first air passage. The spool cavity includes a first cavity section and a second cavity section, and the cross-section of the first cavity section is larger than that of the second cavity section. The valve body is provided with a second air passage communicating with the outside; a spool, which is arranged in the spool cavity, and the spool includes a valve block and a limiting end, and the spool is provided with a third air passage; a valve seat, which is in sealing cooperation with the valve seat cavity, and the valve seat is provided with a vent hole communicating the first air passage and the second cavity section, and the valve seat can move closer to or away from the spool in the valve seat cavity. A second elastic member is arranged between the valve seat and the valve body, and the second elastic member provides a force for the valve seat to move towards the spool; wherein, when the valve seat moves towards the spool to a set position, the valve block can abut against the valve seat to close the vent hole. The present invention effectively solves the existing problems by optimizing the installation structure of the spool and the valve seat.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen storage, and particularly relates to a gas valve for hydrogen storage. Background Art

[0002] As an important clean energy, hydrogen energy has been increasingly developed and utilized in recent years. Among them, the storage and release of hydrogen are key links. When inflating and deflating a hydrogen storage container, a dedicated gas valve is required to control the gas path. Due to the high air pressure characteristics of the hydrogen storage container, reducing the high-pressure impact of the gas is a key technology during the inflating and deflating operations.

[0003] The prior patent with the application number 201711346991.9 discloses an integrated pressure reducing valve, which reduces the outlet pressure through the cooperation of two-stage pressure reducing valves. The prior gas valve of this kind adopts a two-stage pressure increasing valve structure to control the air pressure, with a relatively complex structural form and poor use stability. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a gas valve for hydrogen storage, which effectively solves the existing problems by optimizing the installation structure of the valve core and the valve seat.

[0005] In order to solve the above problems, the present invention provides a gas valve for hydrogen storage, comprising: a valve body, provided with a valve core cavity, a valve seat cavity communicating with the valve core cavity, and a first air passage communicating with the side of the valve seat cavity away from the valve core cavity. The valve core cavity includes a first cavity section and a second cavity section communicating with the side of the first cavity section facing the valve seat cavity. The cross-section of the first cavity section is larger than that of the second cavity section. The valve body is provided with a second air passage communicating with the outside at the end of the second cavity section facing the valve seat cavity; a valve core, the valve core is arranged in the valve core cavity, the valve core includes a valve block and a limiting end connected to the side of the valve block away from the valve seat cavity. The valve block is in sealing cooperation with the second cavity section, and the limiting end is in sealing cooperation with the first cavity section. The valve core is provided with a third air passage, one end of the third air passage communicates with the second air passage, and the other end communicates with the side of the limiting end away from the valve seat. The valve core can move in the valve core cavity closer to or farther from the valve seat; a valve seat, the valve seat is in sealing cooperation with the valve seat cavity, the valve seat is provided with a ventilation hole communicating the first air passage and the second cavity section, and the valve seat can move in the valve seat cavity closer to or farther from the valve core. A second elastic member is provided between the valve seat and the valve body, and the second elastic member provides a force for the valve seat to move towards the valve core direction; wherein, when the valve seat moves towards the valve core to a set position, the valve block can abut against the valve seat to close the ventilation hole.

[0006] Further, an air gathering groove is provided on the side of the limiting end away from the valve seat, and the limiting end can move so that the edge of the air gathering groove abuts against the bottom wall of the first cavity section.

[0007] Further, a first elastic member is provided between the valve core and the valve body, and the first elastic member provides a force for the valve core to move in a direction away from the valve seat.

[0008] Further, the ventilation hole includes a first hole section communicating with the second cavity section and a second hole section communicating the first hole section and the first air duct, and the cross section of the second hole section is larger than that of the first hole section.

[0009] Further, the second elastic member includes a spring disposed in the second hole section.

[0010] Further, a gas guiding gap is provided between the inner wall of a section of the second cavity section facing the valve seat cavity and the valve block, and the third air duct communicates with the gas guiding gap.

[0011] Further, the valve block includes a valve block body communicating with the limiting end and a core block body installed on a section of the valve block body facing the valve seat, and the core block body can close the ventilation hole of the valve seat.

[0012] Further, the valve body includes:

[0013] A lower shell having the first air duct and the valve seat cavity;

[0014] An upper shell assembly including an upper shell and a shell cover. The upper shell is connected to one side of the lower shell where the valve seat cavity is located. The upper shell is provided with the second cavity section, and the shell cover is buckled on one side of the upper shell away from the valve seat cavity, and the shell cover and the upper shell enclose to form the first cavity section.

[0015] Further, the upper shell includes an outer ring portion and an inner ring portion disposed inside the outer ring portion. The bottoms of the outer ring portion and the inner ring portion are connected. The inner side of the inner ring portion forms the second cavity section. An annular cavity is formed between the outer ring portion and the inner ring portion. The outer ring portion is provided with a balance air hole communicating the annular cavity and the outside.

[0016] Further, a spring is provided in the annular cavity, and the spring supports the limiting end.

[0017] The beneficial effect of the present invention is that by optimizing the installation structure of the valve core and the valve seat, the existing problems are effectively solved. Description of the Drawings

[0018] The accompanying drawings described herein are used to provide a further understanding of the present invention and form a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 It is a schematic structural diagram of an embodiment of the present invention in a closed state.

[0020] Figure 2 is Figure 1 a schematic structural diagram of the illustrated embodiment in an inflated state.

[0021] Figure 3 is Figure 1 a schematic structural diagram of the illustrated embodiment in a deflated state.

[0022] Figure 4 is Figure 3 a schematic structural diagram of the valve port structure at the moment of closing in the illustrated state.

[0023] Wherein: 1, valve seat cavity; 2, valve core cavity; 201, first cavity section; 202, second cavity section; 3, first air passage; 4, valve block; 401, valve block body; 402, core block body; 5, limiting end; 6, second air passage; 7, third air passage; 8, valve seat; 9, ventilation hole; 901, first hole section; 902, second hole section; 10, second elastic member; 11, air gathering groove; 12, first elastic member; 13, air guiding gap; 14, lower shell; 15, upper shell; 1501, outer ring part; 1502, inner ring part; 16, shell cover; 17, balance air hole; 18, valve port structure. Detailed Embodiments

[0024] In order to more clearly illustrate the overall concept of the present invention, the following will be further described in detail by way of examples in combination with the accompanying drawings of the specification.

[0025] It should be noted that many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0026] In addition, in the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0027] In the present invention, unless otherwise clearly defined and limited, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. However, indicating a direct connection means that there is no connection relationship constructed through an excessive structure between the two connected main bodies, and they are only connected through the connection structure to form an integral whole. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0029] In the present invention, as Figures 1 to 4As shown in the figure, a hydrogen storage gas valve is provided, including: a valve body, provided with a spool cavity 2, a valve seat cavity 1 communicating with the spool cavity 2, and a first air passage 3 communicating on the side of the valve seat cavity 1 away from the spool cavity 2. The spool cavity 2 includes a first cavity section 201 and a second cavity section 202 communicating between the first cavity section 201 facing the valve seat cavity 1. The cross-section of the first cavity section 201 is larger than that of the second cavity section 202. The valve body is provided with a second air passage 6 communicating with the outside at one end of the second cavity section 202 facing the valve seat cavity 1; a spool, the spool is arranged in the spool cavity 2, the spool includes a valve block 4 and a limiting end 5 connected to the side of the valve block 4 away from the valve seat cavity 1. The valve block 4 is in sealing cooperation with the second cavity section 202, the limiting end 5 is in sealing cooperation with the first cavity section 201, the spool is provided with a third air passage 7, one end of the third air passage 7 communicates with the second air passage 6, and the other end communicates with the side of the limiting end 5 away from the valve seat 8. The spool can move closer to or away from the valve seat 8 in the spool cavity 2; a valve seat 8, the valve seat 8 is in sealing cooperation with the valve seat cavity 1, the valve seat 8 is provided with a vent hole 9 communicating the first air passage 3 and the second cavity section 202, and the valve seat 8 can move closer to or away from the spool in the valve seat cavity 1. A second elastic member 10 is arranged between the valve seat 8 and the valve body, and the second elastic member 10 provides a force for the valve seat 8 to move towards the spool; wherein, when the valve seat 8 moves towards the spool to a set position, the valve block 4 of the spool can abut against the valve seat 8 to close the vent hole 9.

[0030] When the present invention is in use, as Figures 1 to 4 shown in the figure, the first air passage 3 is connected to a hydrogen storage container, and the second air passage 6 is provided with a valve port structure 18 connected to an external gas charging and discharging device.

[0031] In its gas storage state, since the cross-section of the first cavity section 201 is larger than that of the second cavity section 202, so that when the pressure on both sides of the spool is the same (the third air passage 7 communicates with the parts on both sides of the spool up and down), the whole spool is pressed down by the gas pressure to contact the valve seat 8. At this time, the valve block 4 of the spool closes the vent hole 9, and further makes the whole gas valve closed between the spool and the valve seat 8 and the valve port structure 18 of the second air passage connected to the external gas charging and discharging device twice in the gas storage state, so as to improve the stability of the closure of the hydrogen storage container.

[0032] In the inflated state, the second air passage 6 is connected to an external inflation device, and high-pressure gas enters the second cavity section 202 and the valve seat cavity 1. The valve seat 8 is pushed downward in the valve seat cavity 1 and separated from the valve core. At this time, the inflated high-pressure gas enters the ventilation hole 9 and the first air passage 3. Part of the inflated high-pressure gas enters the upper side of the limiting end 5 through the third air passage 7, and the valve core is further pushed downward in the valve core cavity 2. After inflation is completed, when the second air passage 6 is separated from and closed to the external inflation device instantaneously, at this time, under the push of the second elastic member 10 and the gas pressure in the first air passage 3, the valve seat 8 moves upward and contacts the valve block 4, so that the valve block 4 closes the ventilation hole 9. When the valve seat 8 contacts the valve block 4 upward, since the valve block 4 has a certain movement space in the first cavity section 201, the valve core can move upward to reduce the impact between the valve seat 8 and the valve block 4.

[0033] During the deflation operation, the valve port structure 18 of the second air passage 6 is opened. When the valve seat 8 is in the working condition of not moving to the upper limit position, the valve block 4 moves upward under the action of the high-pressure gas in the first air passage 3. At the same time, the high-pressure gas in the ventilation hole 9 pushes the valve block 4 upward, so that the valve block 4 gradually separates from the valve seat 8 to open the ventilation hole 9. The high-pressure gas in the gas storage container is released to the second cavity section 202 through the small gap between the valve block 4 and the valve seat 8 and then enters the second air passage 6 to achieve pressure reduction and release. After the valve core gradually moves to the upper limit position, the outlet pressure of the second air passage 6 gradually stabilizes. After the valve port structure 18 of the second air passage 6 is closed to complete deflation, when the pressure on the upper side of the limiting end 5 of the valve core is close to the pressure on the lower side of the valve block 4 (after the valve port structure 18 is closed, the pressure on the upper side of the valve core increases), at this time, the pressure on the upper side of the valve core is greater than the pressure at the bottom of the valve block 4, and the valve core moves downward rapidly. The valve block 4 contacts the valve seat 8 and closes the ventilation hole 9. During this process, as Figure 4 shown, since the valve seat 8 adopts a non-fixed valve seat 8, the valve seat 8 has a space for downward compression and movement, so that the valve block 4 can move downward through the valve seat 8 when closing the valve seat 8 to unload the high impact between the valve block 4 and the valve seat 8, thereby reducing the impact loss between the valve seat 8 and the valve core and further improving the use stability of the entire valve.

[0034] It can be seen from this that the present invention can realize gas circulation operation through a gas path at the valve seat 8 during inflation and deflation through a relatively simple valve core and valve seat 8 structure. The structure is simple, and the valve seat 8 adopts a non-fixed valve seat 8, which can unload the impact pressure on the valve core when the valve core actively closes the ventilation hole 9 of the valve seat 8, and improves the stability of the closed fit between the valve block 4 and the valve seat 8.

[0035] In a preferred embodiment, for the structure of the present invention, a further optimized setting is that, as Figures 1 to 4As shown, an air gathering groove 11 is provided on the side of the limiting end 5 away from the valve seat 8. The limiting end 5 can move so that the edge of the air gathering groove 11 abuts against the bottom wall of the first cavity section 201 (the opening of the first cavity section faces downward, and the bottom wall is the cavity wall at the upper side position of the limiting end in the figure).

[0036] As shown in the figure, by providing the air gathering groove 11, after the air release is completed, when closing the valve port structure 18 of the second air passage 6, the edge part of the air gathering groove 11 abuts against the bottom wall of the first cavity section 201. The gas in the air gathering groove 11 directly provides a downward pressure to the valve core. At this time, the instantaneous pressure difference between the upper and lower sides of the valve core is relatively small, which can reduce the instantaneous speed of the valve core startup. When the edge of the air gathering groove 11 separates from the bottom wall of the first cavity section 201, the pressure difference between the upper and lower sides of the valve core is relatively large, further pushing the valve core block to move rapidly towards the valve seat 8 (in the illustrated embodiment, in the condition where a spring is provided below the limiting end 5, after the edge of the air gathering groove 11 separates from the bottom wall of the first cavity section 201, as the resistance of the limiting end 5 compressing the spring increases, the spring resistance can overcome part of the increased pressure on the upper side of the valve core, thereby making the change in the pressure difference between the upper and lower sides of the valve core smaller and reducing the degree of valve core acceleration).

[0037] Through such improvement of the present invention, the problem that gas is difficult to pass through due to the tight contact between the limiting end 5 and the bottom wall of the first cavity section 201 can be prevented, and the valve core can be driven to start in segments when starting to move, further reducing the startup speed of the valve core, and further reducing the impact of the valve block 4 on the valve seat 8.

[0038] In the illustrated embodiment, for the structure of the present invention, a further optimized setting is that a first elastic member 12 is provided between the valve core and the valve body, and the first elastic member 12 provides a force for the valve core to move away from the valve seat 8. As shown in the figure, when performing the air release operation, the elastic force of the first elastic member 12 can be utilized to gradually move the valve core to the uppermost limit position of the valve core cavity 2, so that a relatively large gap can be formed between the valve block 4 and the valve seat 8 during the stable air release stage, thereby improving the air release efficiency. Moreover, after the air release is completed, when the valve core moves downward and the valve block 4 abuts against the valve seat 8, the first elastic member 12 can play an elastic buffering role on the valve core to further reduce the impact between the valve block 4 and the valve seat 8.

[0039] In a preferred embodiment, for the structure of the present invention, a further optimized setting is that the air vent hole 9 includes a first hole section 901 communicating with the second cavity section 202 and a second hole section 902 communicating the first hole section 901 and the first air passage 3, and the cross-section of the second hole section 902 is larger than that of the first hole section 901.

[0040] In the illustrated embodiment, for the structure of the present invention, a further optimized setting is that the second elastic member 10 includes a spring disposed in the second hole section 902.

[0041] In the illustrated embodiment, for the structure of the present invention, a further optimized setting is that there is an air guiding gap 13 between the inner wall of a section of the second cavity section 202 facing the valve seat cavity 1 and the valve block 4, and the third air passage 7 communicates with the air guiding gap 13.

[0042] As shown in the figure, the cavity diameter of the second cavity section 202 at the position of the air guiding gap 13 is enlarged to form the air guiding gap 13 between the valve blocks 4, and the third air passage 7 has an opening on the side wall of the valve block 4 to communicate with the air guiding gap 13.

[0043] In the illustrated embodiment, for the connection setting of the second air passage 6, as shown in the figure, the side wall at the lower end position of the air guiding gap 13 communicates with the third air passage 7.

[0044] In the illustrated embodiment, for the structure of the present invention, a further optimized setting is that the valve block 4 includes a valve block body 401 communicating with the limiting end 5 and a core block body 402 installed on a section of the valve block body 401 facing the valve seat 8, and the core block body 402 can close the ventilation hole 9 of the valve seat 8.

[0045] As shown in the figure, one end of the valve block body 401 facing the valve seat cavity 1 is provided with a mounting hole, and the core block body 402 is embedded in the mounting hole. Thus, a core block body 402 with a certain elasticity (such as polyurethane) can be adopted, so that the valve block body 401 and the core block body 402 can be set differently, and further improve the stability of the valve core closing the valve seat 8.

[0046] In the illustrated embodiment, for the structure of the present invention, a further optimized setting is that the valve body includes: a lower shell 14 having the first air passage 3 and the valve seat cavity 1; an upper shell 15 assembly including an upper shell 15 and a shell cover 16, the upper shell 15 is connected to one side of the lower shell 14 where the valve seat cavity 1 is located, the upper shell 15 is provided with the second cavity section 202, and the shell cover 16 is buckled on the side of the upper shell 15 away from the valve seat cavity 1, and the shell cover 16 and the upper shell 15 enclose to form the first cavity section 201.

[0047] As shown in the figure, when assembling again, the valve seat 8 can be first installed in the valve seat cavity 1, then the upper shell 15 is connected to the lower shell 14. After the valve core is installed inside the upper shell 15, the shell cover 16 is installed outside the upper shell 15, thus completing the assembly of the entire valve body. Specifically, the lower end of the upper shell 15 is screwed inside the lower shell 14, the side wall of the shell cover 16 is screwed outside the lower shell 14, and sealing rings are respectively provided between the upper shell 15 and the lower shell 14, and between the upper shell 15 and the shell cover 16.

[0048] In the illustrated embodiment, for the structure of the present invention, a further optimized setting is that the upper shell 15 includes an outer ring portion 1501 and an inner ring portion 1502 provided inside the outer ring portion 1501. The bottoms of the outer ring portion 1501 and the inner ring portion 1502 are connected. The inner side of the inner ring portion 1502 forms the second cavity section 202, and a ring cavity is formed between the outer ring portion 1501 and the inner ring portion 1502. The outer ring portion 1501 is provided with a balance air hole 17 communicating the ring cavity and the outside.

[0049] As shown in the figure, by providing the inner ring portion 1502 and the outer ring portion 1501, a gas buffer cavity can be formed in the ring cavity. When the valve core moves downward after the deflation ends and the valve block 4 contacts the seat body to close the air vent hole 9, the gas in the ring cavity is compressed by the limiting end 5 and discharged through the balance air hole 17. In this way, the gas in the ring cavity can buffer the movement of the limiting end 5, so as to further reduce the impact of the valve block 4 on the valve seat 8. By using the gas in the ring cavity to buffer the limiting end 5, after the valve core moves downward to contact the valve seat 8, the gas pressure in the ring cavity is consistent with the external air pressure, and the upward supporting force of the gas in the ring cavity on the limiting end 5 is small, which is beneficial to maintaining the state of the valve block 4 pressing downward against the valve seat 8.

[0050] In the illustrated embodiment, the side of the shell cover 16 surrounds the outside of the outer ring portion 1501, and the shell cover 16 is provided with a guide air hole communicating with the balance air hole 17 at the position corresponding to the balance air hole 17.

[0051] In the illustrated embodiment, for the structure of the first elastic member 12, more specifically, as shown in the figure, a spring is provided in the ring cavity, and the spring supports the limiting end 5. As shown in the figure, the ring cavity provides an installation space for the first elastic member 12, so that when the valve core moves downward after the deflation ends, at the position of the ring cavity, not only can the air be compressed and buffered outward through the balance air hole 17, but also the spring of the first elastic member 12 can be used for buffering.

[0052] It should be noted that the improvement of the present invention lies in the improvement of the positions of the valve core and the valve seat 8 during the inflation and deflation process, and there is no restriction or improvement on the valve port structure 18 of the second air passage 6. Those skilled in the art can flexibly select the valve port structure 18 during specific implementation. As a preferred embodiment, in the embodiment shown in the figure, a block insert valve core can be provided at the position of the valve port structure 18; alternatively, other forms of valve port structures 18 can also be adopted, such as the air core structure of an existing tire.

[0053] Each embodiment in this specification is described in a progressive manner. The same or similar parts among the embodiments can be referred to each other, and the key point of each embodiment is to illustrate the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method embodiment.

[0054] The above description is only for the embodiments of the present application and is not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. A hydrogen storage gas valve, characterized in that Comprising: A valve body, provided with a spool cavity, a valve seat cavity communicating with the spool cavity, and a first air passage communicating on the side of the valve seat cavity away from the spool cavity. The spool cavity includes a first cavity section and a second cavity section communicating on the side of the first cavity section facing the valve seat cavity. The cross-section of the first cavity section is larger than that of the second cavity section. The valve body is provided with a second air passage communicating with the outside at one end of the second cavity section facing the valve seat cavity; A spool, the spool is arranged in the spool cavity. The spool includes a valve block and a limiting end connected to the side of the valve block away from the valve seat cavity. The valve block is in sealing fit with the second cavity section, and the limiting end is in sealing fit with the first cavity section. The spool is provided with a third air passage, one end of the third air passage communicates with the second air passage, and the other end communicates with the side of the limiting end away from the valve seat. The spool can move in the spool cavity closer to or farther from the valve seat; A valve seat, the valve seat is in sealing fit with the valve seat cavity. The valve seat is provided with a vent hole communicating the first air passage and the second cavity section, and the valve seat can move in the valve seat cavity closer to or farther from the spool. A second elastic member is provided between the valve seat and the valve body, and the second elastic member provides a force in the direction of the valve seat towards the spool; Wherein, when the valve seat moves towards the spool to a set position, the valve block can abut against the valve seat to close the vent hole; A gas gathering groove is provided on the side of the limiting end away from the valve seat. The limiting end can move so that the edge of the gas gathering groove abuts against the bottom wall of the first cavity section; A gas guiding gap is provided between the inner wall of a section of the second cavity section facing the valve seat cavity and the valve block, and the third air passage communicates with the gas guiding gap.

2. The hydrogen storage gas valve according to claim 1, characterized in that, A first elastic member is provided between the spool and the valve body, and the first elastic member provides a force for the spool to move in a direction away from the valve seat.

3. A hydrogen storage gas valve according to claim 1, characterized in that, The vent hole includes a first hole section communicating with the second cavity section and a second hole section communicating the first hole section and the first air passage. The cross-section of the second hole section is larger than that of the first hole section.

4. The hydrogen storage gas valve according to claim 3, characterized in that, The second elastic member includes a spring arranged in the second hole section.

5. A hydrogen storage gas valve according to claim 1, characterized in that, The valve block includes a valve block body communicating with the limiting end and a core block body installed on a section of the valve block body facing the valve seat. The core block body can close the vent hole of the valve seat.

6. A hydrogen storage gas valve according to claim 1, characterized in that, The valve body includes: A lower shell, the lower shell has the first air passage and the valve seat cavity; An upper shell assembly, including an upper shell and a shell cover. The upper shell is connected to the side of the lower shell where the valve seat cavity is located. The upper shell is provided with the second cavity section, and the shell cover is buckled on the side of the upper shell away from the valve seat cavity. The shell cover and the upper shell enclose to form the first cavity section.

7. The hydrogen storage gas valve according to claim 6, characterized in that, The upper shell includes an outer ring part and an inner ring part arranged inside the outer ring part. The bottom of the outer ring part and the inner ring part are connected. The inner side of the inner ring part forms the second cavity section. A ring cavity is formed between the outer ring part and the inner ring part. The outer ring part is provided with a balance air hole communicating the ring cavity and the outside.

8. A hydrogen storage gas valve according to claim 7, characterized in that, A spring is arranged in the ring cavity, and the spring supports the limiting end.

Images