Quick liquid hydrogen charging safety valve and liquid hydrogen storage equipment

Abstract

The utility model discloses a quick liquid hydrogen charging safety valve and liquid hydrogen storage equipment, the quick liquid hydrogen charging safety valve comprises: a housing which is of a hollow structure and is internally provided with a first cavity; the inlet is formed in the shell and communicates with the first cavity, and an outlet is further formed in the shell; the first sealing valve element is arranged in the first cavity, a first elastic piece is arranged between the first sealing valve element and the shell, and the first elastic piece is used for pushing the first sealing valve element, abutting against the shell and achieving sealing of the first cavity; the ejector core is arranged in the shell, a second elastic piece is arranged between the ejector core and the shell, and when the ejector core is pressed by external force, the first sealing valve element can be pushed to move towards the first elastic piece so as to communicate the inlet with the outlet. According to the quick liquid hydrogen charging safety valve and the liquid hydrogen storage equipment, charging of liquid hydrogen can be smoothly completed through the valve, leakage of the liquid hydrogen can be avoided under the action of the first elastic piece, the ejector core can be actively pressed in emergency to discharge the liquid hydrogen, and the accident risk is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid hydrogen energy storage, and more specifically, to a rapid liquid hydrogen filling safety valve. In addition, the utility model also relates to a liquid hydrogen storage device including the above-mentioned rapid liquid hydrogen filling safety valve. Background Art

[0002] In the rapid development of liquid hydrogen energy technology, as an efficient and clean energy carrier, the safety and efficiency of liquid hydrogen storage and transportation have attracted increasing attention. Liquid hydrogen has extremely low temperature and extremely high energy density, with a normal boiling point of 20.37 K (-252.78 °C) and a freezing point of 13.96 K (-259.19 °C). These characteristics make it necessary to use special equipment and strict control conditions during the storage and transportation of liquid hydrogen.

[0003] Currently, liquid hydrogen is mostly stored in the form of storage tanks, and most of the existing valves only have basic cut-off and adjustment functions. During the filling process, if the liquid hydrogen flow rate is too fast or the pressure is too high, it may cause valve damage or leakage, and then lead to serious consequences such as fire or explosion.

[0004] In summary, how to improve the safety of liquid hydrogen storage is an urgent problem to be solved by those skilled in the art at present. Summary of the Utility Model

[0005] In view of this, the purpose of the utility model is to provide a rapid liquid hydrogen filling safety valve. Through this safety valve, liquid hydrogen can be introduced into the container. After the liquid hydrogen filling is completed, the first elastic member and the first sealing valve core can play a sealing role. When the pressure in the container is too high, the liquid hydrogen discharge can be accelerated by pressing the top core, reducing the risk of safety accidents.

[0006] Another purpose of the utility model is to provide a liquid hydrogen storage device including the above-mentioned rapid liquid hydrogen filling safety valve.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A rapid liquid hydrogen filling safety valve, comprising:

[0009] A housing, which is a hollow structure and has a first cavity inside;

[0010] An inlet, which is provided on the housing and communicates with the first cavity, and an outlet is also provided on the housing;

[0011] A first sealing valve core, which is arranged in the first cavity. A first elastic member is arranged between the first sealing valve core and the housing. The first elastic member is used to push the first sealing valve core and abut against the housing to achieve the sealing of the first cavity;

[0012] A top core is arranged in the shell, and a second elastic member is arranged between the top core and the shell. When the top core is pressed by an external force, it can push the first sealing valve core to move toward the first elastic member to connect the inlet and the outlet.

[0013] Preferably, the end of the first sealing valve core facing the outlet includes a sealing head and a contact head, the sealing head is a truncated cone structure, the contact head is arranged on the side of the sealing head facing the outlet, and the end of the contact head in contact with the top core is a spherical surface.

[0014] Preferably, a guide ring is provided on the outer periphery of the contact head, and a plurality of through holes are provided on the guide ring.

[0015] Preferably, the end of the top core that contacts the first sealing valve core is a spherical surface, the end of the top core that faces away from the outlet is a truncated cone-shaped sealing head and a contact head with a spherical surface, and a rotatable handle is also provided on the shell, and the contact head can be pressed when the handle is rotated.

[0016] Preferably, a guide sealing seat is provided on the outer periphery of the top core on a side close to the outlet.

[0017] Preferably, it also includes a second cavity, in which a second sealing valve core, a third elastic member and a guide ring are arranged, in which the second sealing valve core is arranged, and the third elastic member is arranged between the second sealing valve core and the shell.

[0018] Preferably, the second sealing valve core has the same structure as the first sealing valve core, and the third elastic member has the same structure as the first elastic member.

[0019] Preferably, the shell is a T-shaped tubular structure, and two ends of the tubular structure are provided with detachable sealing plates.

[0020] Preferably, a support structure is provided in the shell near the outlet, and the support structure is arranged corresponding to the top core.

[0021] A liquid hydrogen storage device comprises a rapid liquid hydrogen charging safety valve, wherein the rapid liquid hydrogen charging safety valve is any one of the rapid liquid hydrogen charging safety valves described above.

[0022] A rapid liquid hydrogen filling safety valve provided by the present utility model. A first sealing valve core, a first elastic member, a top core and a second elastic member are arranged inside the housing of the safety valve. When the top core is pressed from outside the housing, the first sealing valve core can be extruded through the top core, so that there is a gap between the first sealing valve core and the inside of the housing. Liquid hydrogen can enter the housing from the inlet, pass through the gap between the first sealing valve core and the housing, and finally flow out from the outlet and be filled into the container. After the filling is completed, when the pressing on the top core is released, the second elastic member can push the top core towards the housing, and the first elastic member can also push the first sealing valve core, so that the first sealing valve core blocks the connection between the inlet and the outlet to prevent the liquid hydrogen in the container from leaking. In an emergency, by pressing the top core, the originally isolated outlet and inlet can be connected, and the liquid hydrogen injected into the container will quickly pass through the outlet and then flow back to the inlet through the first cavity to form an emergency discharge path. The dynamic pressure generated when the liquid hydrogen flows will further push the first sealing valve core to open, accelerating the discharge process, effectively reducing the accident risk and improving the safety. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0024] Figure 1 It is a cross-sectional view of the rapid liquid hydrogen filling safety valve provided by the present utility model;

[0025] Figure 2 It is a partial cross-sectional view of the rapid liquid hydrogen filling safety valve provided by the present utility model.

[0026] Reference Numerals:

[0027] 1 - Housing; 2 - First cavity; 3 - Inlet; 4 - Outlet; 5 - First sealing valve core; 6 - First elastic member; 7 - Top core; 8 - Second elastic member; 9 - Handle; 10 - Guide ring; 11 - Second cavity; 12 - Second sealing valve core; 13 - Third elastic member; 14 - Support structure. Detailed Embodiments

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0029] The core of the present utility model is to provide a quick liquid hydrogen filling safety valve, which can play a sealing role. When the pressure in the container is too high, pressing the top core can accelerate the liquid hydrogen discharge and reduce the risk of safety accidents.

[0030] Another core of the present utility model is to provide a liquid hydrogen storage device including the above-mentioned quick liquid hydrogen filling safety valve.

[0031] It should be noted that the orientation or positional relationship indicated by "up", "down", "front", "back", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application 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 cannot be understood as a limitation to the present application.

[0032] A quick liquid hydrogen filling safety valve provided by the present application includes: a housing 1, an inlet 3, a first sealing valve core 5 and a top core 7;

[0033] Among them, the housing 1 is a hollow structure, and a first cavity 2 is provided inside it;

[0034] The inlet 3 is provided on the housing 1 and communicates with the first cavity 2, and an outlet 4 is also provided on the housing 1;

[0035] The first sealing valve core 5 is arranged in the first cavity 2, and a first elastic member 6 is arranged between the first sealing valve core 5 and the housing 1. The first elastic member 6 is used to push the first sealing valve core 5 and abut against the housing 1 to seal the first cavity 2;

[0036] The top core 7 is arranged in the housing 1, and a second elastic member 8 is arranged between the top core 7 and the housing 1. When the top core 7 is pressed by an external force, it can push the first sealing valve core 5 to move towards the first elastic member 6 to communicate the inlet 3 and the outlet 4.

[0037] Specifically, the first end of the housing 1 corresponds to the first cavity 2. The first sealing valve core 5 and the first elastic member 6 are arranged in the first cavity 2. The first elastic member 6 is sleeved on the outer periphery of the first sealing valve core 5. In the normal state, the first elastic member 6 is in a compressed state, which plays a pushing role on the first sealing valve core 5, abuts it against the position of the housing 1 close to the outlet 4, and realizes the blockage between the inlet 3 and the outlet 4. The top core 7 is arranged in the second end of the housing 1. The top core 7 is perpendicular to the first sealing valve core 5. A second elastic member 8 is sleeved on the outer periphery of the top core 7. The second elastic member 8 is usually in a compressed state and pushes the top core 7 to abut against the housing 1, so that the top core 7 has a movement tendency away from the outlet 4. Press the top core 7 outside the housing 1 so that the top core 7 moves towards the direction of the outlet 4. Please refer to the attached Figure 1During the descent, the top core 7 can contact the first sealing valve core 5 and squeeze the first sealing valve core 5, so that the first sealing valve core 5 can move to the left. During this process, a gap appears between the first sealing valve core 5 and the shell 1, so that the inlet 3 and the outlet 4 can be connected, and the liquid hydrogen can enter from the inlet 3, flow through the gap between the first sealing valve core 5 and the shell 1, and finally discharge from the shell 1 at the outlet 4 and enter the container. After the filling is completed, the pressure on the top core 7 is released, and the first elastic member 6 can push the first sealing valve core 5 to reset, so as to isolate the inlet 3 from the outlet 4 and avoid leakage of liquid hydrogen. In addition, by controlling the progress of pressing the top core 7, the size of the gap between the first sealing valve core 5 and the shell 1 can be indirectly controlled to adjust the filling speed.

[0038] After completing the charging and loading, in case of emergency, such as detecting excessive pressure or other safety hazards, the operator can quickly press the top core 7 to connect the originally isolated outlet 4 with the inlet 3, and the injected liquid hydrogen will quickly pass through the outlet 4, through the first cavity 2 and then return to the inlet 3, forming an emergency discharge path. The dynamic pressure generated when the liquid hydrogen flows will further push the first sealing valve core 5 to open, accelerate the discharge process, effectively reduce the risk of accidents, and make it safer to use.

[0039] Based on the above embodiment, the end of the first sealing valve core 5 facing the outlet 4 includes a sealing head and a contact head. The sealing head is a truncated cone structure. The contact head is arranged on the side of the sealing head facing the outlet, and the end of the contact head in contact with the top core 7 is a spherical surface.

[0040] Specifically, the sealing head is a truncated cone structure, and the corresponding position in the shell 1 is also set to an arc surface. A contact head is provided on the side of the first sealing valve core 5 facing the outlet 4, and the end of the contact head that contacts the top core 7 is a spherical surface, so that the top core 7 and the contact head can be squeezed smoothly without causing serious damage.

[0041] On the basis of the above-mentioned embodiment, a guide ring 10 is sleeved on the outer periphery of the contact head, and a plurality of through holes are also provided on the guide ring 10 .

[0042] Specifically, the portion of the shell 1 near the outlet 4 is a cylindrical cavity, and the size of the contact head is smaller than the size of the cavity. Therefore, a guide ring 10 needs to be sleeved on the outer periphery of the contact head. The guide ring 10 can guide and limit the contact head, and can also improve the accuracy and stability of the movement of the sealing valve core. A through hole is provided on the guide ring 10, and the size of the through hole should be adaptively set to facilitate the charging of liquid hydrogen while ensuring the structural strength of the guide ring 10.

[0043] Optionally, a guide seat is provided on the side of the first sealing valve core 5 facing away from the outlet. The guide seat is sleeved on the outer periphery of the first sealing valve core 5 and cooperates with the guide ring 10 to play a guiding role and reserve sufficient movement space for the first sealing valve core 5.

[0044] In some embodiments, the end of the top core 7 that contacts the first sealing valve core 5 is a spherical surface, and the end of the top core 7 that faces away from the outlet 4 is a truncated cone-shaped sealing head and a contact head with a spherical surface. A rotatable handle 9 is also provided on the shell 1, and the contact head can be pressed when the handle 9 is rotated.

[0045] Specifically, the end of the top core 7 facing the outlet 4 is also spherical, and the truncated cone-shaped sealing head of the top core 7 is arranged at the upper end. The sealing head is arranged to achieve a buffering effect. The top end of the top core 7 is also spherical, and the handle 9 is arranged in a bent state. The angle between the two sections of the handle 9 is an obtuse angle, and the handle 9 can be driven to rotate by holding it. The top core 7 is pressed by the handle 9. Controlling the rotation amplitude of the handle 9 can indirectly control the size of the gap between the first sealing valve core 5 and the shell 1, so as to control the flushing speed and the flushing amount. In addition, the setting of the handle 9 utilizes the lever principle, which can save more effort.

[0046] On the basis of the above embodiment, a guide sealing seat is sleeved on the outer periphery of the top core 7 on the side close to the outlet 4 .

[0047] Specifically, the top core 7 is also arranged in the detachable part of the shell 1, and a guide sealing seat is sleeved on the outer periphery of the top core 7, which can guide the top core 7 and also isolate the top core 7 from the outlet 4 to prevent liquid hydrogen from leaking into the cavity where the top core 7 is located.

[0048] In some embodiments, a second cavity 11 is further included, in which a second sealing valve core 12, a third elastic member 13 and a guide ring 10 are disposed. The second cavity 11 is provided with a second sealing valve core 12, and the third elastic member 13 is disposed between the second sealing valve core 12 and the housing 1.

[0049] Specifically, the second cavity 11 and the first cavity 2 are symmetrically arranged about the outlet 4. The arrangement of the second cavity 11 and its internal components not only ensures the balanced distribution of pressure inside the valve, reduces structural stress concentration and sealing failure problems that may be caused by uneven pressure, but also improves the stability and durability of the overall structure.

[0050] On the basis of the above embodiment, the second sealing valve core 12 has the same structure as the first sealing valve core 5 , and the third elastic member 13 has the same structure as the first elastic member 6 .

[0051] Specifically, the structures of the second sealing valve core 12, the third elastic member 13, and the guide ring 10 provided inside the second cavity 11 are the same as those of the first sealing valve core 5, the first elastic member 6, and the guide ring 10, and they are also symmetrically arranged about the outlet 4. When the top core 7 moves downward, it can simultaneously and equally extrude the first sealing valve core 5 and the second sealing valve core 12. Liquid hydrogen enters the housing 1 from the inlet 3, successively fills the first cavity 2 and the second cavity 11, and enters the container from the outlet 4. During the reset process, the sealing valve cores in the two cavities simultaneously and evenly push the top core 7, ensuring the stable, rapid, and precise reset of the top core 7, and effectively avoiding jamming or damage that may be caused by uneven force.

[0052] In some embodiments, the housing 1 is a T-shaped tubular structure, and detachable sealing plates are provided at both ends of the tubular structure.

[0053] Specifically, the cross-section of the housing 1 is T-shaped, and its three end parts respectively correspond to the first cavity 2, the cavity where the top core 7 is located, and the second cavity 11. It should be noted that detachable sealing plates are provided at the two ends corresponding to the first cavity 2 and the second cavity 11. Components can be loaded into the housing 1 in the disassembled state of the sealing plates. The part corresponding to the cavity where the top core 7 is located is also detachable, so as to facilitate loading components such as the top core 7 into the cavity.

[0054] On the basis of the above embodiments, a support structure 14 is provided near the outlet 4 inside the housing 1, and the support structure 14 is arranged corresponding to the top core 7.

[0055] Specifically, please refer to the appendix Figure 2 , a support structure 14 is provided at the position directly below the outlet 4. The support structure 14 is generally an elastic member, which can play a role in buffering and supporting the lower end surface of the top core 7, preventing the top core 7 from directly contacting and squeezing the inner wall of the housing 1, so as to extend the service life of the equipment.

[0056] In addition to the above-mentioned rapid liquid hydrogen charging safety valve, the present invention also provides a liquid hydrogen storage device including the rapid liquid hydrogen charging safety valve disclosed in the above embodiments. For the structures of other parts of the liquid hydrogen storage device, please refer to the prior art and will not be elaborated herein.

[0057] In this specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same and similar parts among the various embodiments, reference can be made to each other.

[0058] The above has introduced in detail a fast liquid hydrogen filling safety valve and a liquid hydrogen storage device provided by the present utility model. Specific examples are used in this article to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle of the present utility model, several improvements and modifications can still be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

Claims

1. A rapid liquid hydrogen filling safety valve, characterized in that, include: The shell (1) is a hollow structure, and a first cavity (2) is provided inside the shell; an inlet (3) provided on the shell (1) and in communication with the first cavity (2); the shell (1) is also provided with an outlet (4); A first sealing valve core (5) is arranged in the first cavity (2); a first elastic member (6) is arranged between the first sealing valve core (5) and the housing (1); the first elastic member (6) is used to push the first sealing valve core (5) to abut against the housing (1) and achieve sealing of the first cavity (2); A top core (7) is disposed in the housing (1), and a second elastic member (8) is disposed between the top core (7) and the housing (1). When the top core (7) is pressed by an external force, it can push the first sealing valve core (5) to move toward the first elastic member (6) to connect the inlet (3) with the outlet (4).

2. The quick liquid hydrogen filling safety valve according to claim 1, characterized in that, The end of the first sealing valve core (5) facing the outlet (4) comprises a sealing head and a contact head, the sealing head is a truncated cone structure, the contact head is arranged on the side of the sealing head facing the outlet, and the end of the contact head that contacts the top core (7) is a spherical surface.

3. The quick liquid hydrogen filling safety valve according to claim 2, characterized in that, A guide ring (10) is sleeved on the outer periphery of the contact head, and a plurality of through holes are also provided on the guide ring (10).

4. The quick liquid hydrogen filling safety valve according to claim 1, characterized in that, The end of the top core (7) that contacts the first sealing valve core (5) is a spherical surface, and the end of the top core (7) that faces away from the outlet (4) is a truncated cone-shaped sealing head and a contact head with a spherical surface. The housing (1) is also provided with a rotatable handle (9), and the handle (9) can press the contact head when it is rotated.

5. The quick liquid hydrogen filling safety valve according to claim 4, characterized in that, A guide sealing seat is sleeved on the outer periphery of the top core (7) on a side close to the outlet (4).

6. The quick liquid hydrogen filling safety valve according to claim 1, characterized in that, The invention also comprises a second cavity (11), wherein a second sealing valve core (12), a third elastic member (13) and a guide ring (10) are arranged in the second cavity (11), wherein the second sealing valve core (12) is arranged in the second cavity (11), and the third elastic member (13) is arranged between the second sealing valve core (12) and the housing (1).

7. The quick liquid hydrogen filling safety valve according to claim 6, characterized in that, The second sealing valve core (12) has the same structure as the first sealing valve core (5), and the third elastic member (13) has the same structure as the first elastic member (6).

8. The quick liquid hydrogen filling safety valve according to claim 1, characterized in that, The shell (1) is a T-shaped tubular structure, and detachable sealing plates are provided at two ends of the tubular structure.

9. The quick liquid hydrogen filling safety valve according to any one of claims 1 to 8, characterized in that, A support structure (14) is provided in the housing (1) near the outlet (4), and the support structure (14) is arranged corresponding to the top core (7).

10. A liquid hydrogen storage device, including a quick liquid hydrogen filling safety valve, characterized in that, The rapid liquid hydrogen charging safety valve is the rapid liquid hydrogen charging safety valve as claimed in any one of claims 1 to 9.

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