A hydrogen storage tank capable of automatically relieving pressure and alarming

Abstract

The present invention discloses a hydrogen storage tank capable of automatically relieving pressure and alarming, which comprises a storage unit including an inner tank, a hydrogen outlet, an outer tank, a nitrogen outlet, and a support platform; an inflation unit including an inflation port, an intake assembly, and a gas reversing valve; and a pressure relief unit including a pressure relief cover, a ventilation column, a pressure relief member, and a pressure sensor. The beneficial effects of the present invention are as follows: by filling inert nitrogen in the interlayer between the inner and outer tanks, accidents such as spontaneous combustion and gas cloud explosion caused by accidental leakage of high-pressure hydrogen can be effectively prevented. By adjusting the same inflation device, the operations of injecting nitrogen into the interlayer and high-pressure hydrogen injection can be respectively achieved, reducing processes and improving work efficiency. In addition, through a pressure relief device, excessive hydrogen is relieved to the nitrogen interlayer, so that the released hydrogen cannot contact the outside air, eliminating the explosion risk. The hydrogen-nitrogen mixed gas in the interlayer can also be recycled, improving economic benefits and the safety performance of the storage tank.

Description

Technical Field

[0001] The present invention relates to the technical field of explosive gas storage, and particularly to a hydrogen storage tank capable of automatically relieving pressure and giving an alarm. Background Art

[0002] Hydrogen energy has attracted wide attention as a clean and efficient energy source. As one of its important application scenarios, hydrogen storage tanks have also received increasing attention in research and development. However, hydrogen has an extremely low ignition energy and explosion limit. If too much hydrogen accumulates in the storage tank and is stimulated by external factors or other emergencies, it may cause the storage tank to explode or other accidents.

[0003] Once the existing hydrogen storage tank relieves pressure, the operator may not be able to detect the abnormal situation inside the tank in time, resulting in an increase in potential safety hazards. Moreover, due to the lack of a pressure relief alarm device, the corresponding emergency measures may take longer to be taken, further increasing the risk of potential safety hazards. Therefore, safety prevention measures need to be introduced during the design and use of hydrogen storage tanks. In addition, common pressure relief devices on the market usually reduce the internal pressure of the storage tank by releasing a certain proportion of hydrogen to the outside, which will cause a large amount of hydrogen waste. Moreover, due to the extremely low ignition energy and explosion limit of hydrogen, the process of releasing hydrogen must be precisely controlled. Once released improperly, it may trigger serious safety accidents such as an explosion inside the storage tank. For this reason, the present invention provides a hydrogen storage tank capable of automatically relieving pressure and giving an alarm to overcome such defects. Summary of the Invention

[0004] The purpose of this part is to outline some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Simplifications or omissions may be made in this part, as well as in the abstract and title of the present application, to avoid obscuring the purpose of this part, the abstract, and the title. However, such simplifications or omissions shall not be used to limit the scope of the present invention.

[0005] In view of the problems existing in the above or the prior art, the present invention is proposed.

[0006] Therefore, the purpose of the present invention is to provide a hydrogen storage tank capable of automatically relieving pressure and giving an alarm, which can solve the problems that the nitrogen in the interlayer and the hydrogen in the tank body of the existing hydrogen storage tank are filled by different processes, resulting in low inflation efficiency, and that the pressure relief device of the existing hydrogen storage tank will cause a large amount of hydrogen waste and the release process is not safe and prone to serious safety accidents such as an explosion inside the tank.

[0007] To solve the above technical problems, the present invention provides the following technical solutions: A hydrogen storage tank capable of automatically relieving pressure and alarming, which includes a storage unit, comprising an inner tank, a hydrogen outlet provided on one side of the inner tank, an outer tank provided outside the inner tank, a nitrogen outlet provided on one side of the outer tank, and a support platform provided below the outer tank;

[0008] An inflation unit, including an inflation port, an intake assembly provided on one side of the inflation port, and a gas reversing valve provided on one side of the intake assembly;

[0009] A pressure relief unit, including a pressure relief cover, a ventilation column provided at the bottom of the inner tank, a pressure relief member provided below the pressure relief cover, and a pressure sensor provided at the bottom of the pressure relief member.

[0010] As a preferred solution of the hydrogen storage tank capable of automatically relieving pressure and alarming according to the present invention, wherein: the inflation port includes an inflation pipeline, an inflation flange provided on one side of the inflation pipeline, and a reversing disk provided outside the inflation pipeline.

[0011] As a preferred solution of the hydrogen storage tank capable of automatically relieving pressure and alarming according to the present invention, wherein: the intake assembly includes a ventilation groove provided on one side thereof, a piston provided on one side of the ventilation groove, a through hole provided on one side of the piston, a spring provided on one side of the piston, and a limit torsion bar provided on one side of the piston.

[0012] As a preferred solution of the hydrogen storage tank capable of automatically relieving pressure and alarming according to the present invention, wherein: the ventilation groove communicates with the through hole.

[0013] As a preferred solution of the hydrogen storage tank capable of automatically relieving pressure and alarming according to the present invention, wherein: the gas reversing valve includes a total intake port provided on one side thereof, a first intake port provided opposite to the total intake port, a second intake port provided on one side of the gas reversing valve, a steering assembly provided inside the gas reversing valve, and check valves provided in the first intake port and the second intake port.

[0014] As a preferred solution of the hydrogen storage tank capable of automatically relieving pressure and alarming according to the present invention, wherein: the first intake port includes a ventilation disk provided on one side thereof.

[0015] As a preferred solution of the hydrogen storage tank capable of automatically relieving pressure and alarming according to the present invention, wherein: the steering assembly includes a driving column, a fixing rod provided on one side of the driving column, and partition plates provided on both sides of the fixing rod;

[0016] The driving column includes a limit hole provided on one side thereof and a through through hole provided inside the driving column;

[0017] The fixed rod includes a torsion spring disposed inside thereof.

[0018] As a preferred embodiment of the hydrogen storage tank capable of automatically relieving pressure and alarming of the present invention, wherein: the pressure relief cover includes a plurality of holes disposed on its surface, and a threaded post disposed below the pressure relief cover.

[0019] As a preferred embodiment of the hydrogen storage tank capable of automatically relieving pressure and alarming of the present invention, wherein: the pressure relief member includes an inner cylinder disposed outside the threaded post, an outer cylinder disposed outside the inner cylinder, and a one-way air outlet disposed outside the outer cylinder.

[0020] As a preferred embodiment of the hydrogen storage tank capable of automatically relieving pressure and alarming of the present invention, wherein: the inner cylinder includes a first through hole, and an internal thread disposed on the inner wall of the inner cylinder;

[0021] The outer cylinder includes a first compression spring disposed above it, and a second through hole disposed on the surface of the outer cylinder;

[0022] The one-way air outlet includes an air outlet cavity, a second compression spring disposed inside the air outlet cavity, and a sealing plate disposed on one side of the second compression spring.

[0023] The beneficial effects of the present invention: By filling inert nitrogen in the interlayer between the inner and outer tanks, the present invention can effectively prevent accidents such as spontaneous combustion and gas cloud explosion caused by accidental leakage of high-pressure hydrogen. By performing commutation adjustment on the same gas filling device, the work of injecting nitrogen into the interlayer and injecting hydrogen into the inner tank can be respectively achieved, reducing the process and improving work efficiency. In addition, through a flexible pressure relief device, excessive hydrogen is relieved into the nitrogen interlayer, so that the leaked hydrogen cannot contact the outside air, eliminating the explosion risk. The hydrogen-nitrogen mixed gas in the interlayer can also be recycled, while improving economic benefits and the safety performance of the storage tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. Among them:

[0025] Figure 1 It is a schematic diagram of the overall structure of a hydrogen storage tank capable of automatically relieving pressure and alarming;

[0026] Figure 2 It is a sectional view of the overall structure of a hydrogen storage tank capable of automatically relieving pressure and alarming;

[0027] Figure 3 For the hydrogen storage tank capable of automatically relieving pressure and alarmingFigure 2 Partial enlarged view at A in the [Chinese context];

[0028] Figure 4 Cross-sectional view of the intake component in a hydrogen storage tank capable of automatic pressure relief and alarm;

[0029] Figure 5 Structural schematic diagram of the steering component in a hydrogen storage tank capable of automatic pressure relief and alarm;

[0030] Figure 6 For a hydrogen storage tank capable of automatic pressure relief and alarm Figure 2 Partial enlarged view at B in the [Chinese context];

[0031] Figure 7 Overall structural schematic diagram of the pressure relief unit of a hydrogen storage tank capable of automatic pressure relief and alarm;

[0032] Figure 8 Structural schematic diagram of the inner cylinder in a hydrogen storage tank capable of automatic pressure relief and alarm;

[0033] Figure 9 Structural schematic diagram of the outer cylinder in a hydrogen storage tank capable of automatic pressure relief and alarm. Detailed implementation manners

[0034] To make the above objects, features and advantages of the present invention more obvious and understandable, the following will give a detailed description of the specific implementation manners of the present invention in conjunction with the drawings of the specification.

[0035] In the following description, many specific details are set forth to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0036] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure or characteristic that can be included in at least one implementation manner of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it an individual or alternative embodiment that is mutually exclusive with other embodiments.

[0037] Embodiment 1

[0038] Referring to Figures 1 - 2 , this is the first embodiment of the present invention. This embodiment provides a hydrogen storage tank capable of automatic pressure relief and alarm, which includes a storage unit 100, comprising an inner tank 101, a hydrogen outlet 102 provided on one side of the inner tank 101, an outer tank 103 provided outside the inner tank 101, a nitrogen outlet 104 provided on one side of the outer tank 103, and a support platform 105 provided below the outer tank 103;

[0039] The inflation unit 200 includes an inflation port 201, an intake assembly 202 disposed on one side of the inflation port 201, and a gas reversing valve 203 disposed on one side of the intake assembly 202;

[0040] The pressure relief unit 300 includes a pressure relief cover 301, a ventilation column 302 disposed at the bottom of the inner tank 101, a pressure relief member 303 disposed below the pressure relief cover 301, and a pressure sensor 304 disposed at the bottom of the pressure relief member 303.

[0041] It should be noted that the storage tank body is a double-layer structure, composed of an inner tank 101 and an outer tank 103. Both are high-strength vertical cylindrical storage tanks. The support platform 103 is formed by three support feet evenly arranged around the outer tank 103 and fixedly connected to the outer tank 103 to play a role in fixing and supporting.

[0042] Preferably, nitrogen is filled between the interlayers of the inner tank 101 and the outer tank 103. When the hydrogen storage tank is damaged due to accidental impact, drop or extrusion, this may cause the stored high-pressure hydrogen to leak. When hydrogen leaks, the hydrogen will first mix with the nitrogen in the interlayer to form an inert gas mixture, which can significantly reduce the risk of combustion and explosion.

[0043] Preferably, the hydrogen outlet 102 is fixedly connected to the inner tank 101 in a penetrating manner, and the nitrogen outlet 104 is fixedly connected to the outer tank 103 in a penetrating manner. Both outlets are controlled by different valves.

[0044] Embodiment 2

[0045] Refer to Figures 1 - 5 , which is the second embodiment of the present invention. The difference from the first embodiment is that it further includes that the inflation port 201 includes an inflation pipe 201a, an inflation flange 201b disposed on one side of the inflation pipe 201a, and a reversing disc 201c disposed outside the inflation pipe 201a.

[0046] The intake assembly 202 includes a ventilation groove 202a disposed on one side thereof, a piston 202b disposed on one side of the ventilation groove 202a, a through hole 202c disposed on one side of the piston 202b, a spring 202d disposed on one side of the piston 202b, and a limit torsion bar 202e disposed on one side of the piston 202b.

[0047] The ventilation groove 202a penetrates through to the through hole 202c.

[0048] The gas reversing valve 203 includes a total intake port 203a disposed on one side thereof, a first intake port 203b disposed opposite to the total intake port 203a, a second intake port 203c disposed on one side of the gas reversing valve 203, a steering assembly 203d disposed inside the gas reversing valve 203, and a check valve 203e disposed in the first intake port 203b and the second intake port 203c.

[0049] The first air inlet 203b includes an air vent disk 203b-1 provided on one side thereof.

[0050] The steering assembly 203d includes a drive column 203d-1, a fixed rod 203d-2 provided on one side of the drive column 203d-1, and partition plates 203d-3 provided on both sides of the fixed rod 203d-2;

[0051] The drive column 203d-1 includes a limit hole 203d-1a provided on one side thereof and a through hole 203d-1b penetrating through the drive column 203d-1;

[0052] The fixed rod 203d-2 includes a torsion spring 203d-2a provided inside thereof.

[0053] It should be noted that an external inflating device is fixedly connected to the inflating port 201 through an inflating flange 201b. An annular commutation disk 201c is fixedly connected to the outside of the inflating port 201. An inflating pipe 201a is opened inside the inflating port 201. The diameter of the inflating pipe 201a is the same as that of the air intake assembly 202. The inflating port 201 is sleeved outside the air intake assembly 202. The air vent groove 202b is a circular arc-shaped ring groove of about 120° surrounding the outside of the air intake assembly 202. The piston 202b is frustum-shaped and the table area of the piston 202b facing the air vent groove 202a is smaller than that of the other side. The air vent groove 202b extends to about 1 / 4 of the depth of the piston 202b. The through hole 202c is rectangular, opened on the side of the frustum and communicating with the air vent groove 202a. The thickness of the through hole 202c is about 1 / 8 of the thickness of the piston 202b. The spring 202d is fixedly connected to the end of the piston 202b and faces the air vent groove 202b. The other end of the spring 202d is fixedly connected to the outer tank 103. A limit torsion rod 202e is fixedly connected to the tail of the piston 202b. The limit torsion rod 202e is a long rod with a square cross-section and a relatively high anti-torsion yield strength.

[0054] Preferably, the gas commutation valve 203 is a gas three-way valve. Its total air inlet 203a is fixedly connected to the inner wall of the outer tank 103. Its first air inlet 203b is fixedly connected to the inner tank 101. Its second air inlet 203c communicates with the interlayer between the inner and outer tanks. Check valves 203e are fixedly connected to the inlets of both the first air inlet 203b and the second air inlet 203c. The check valves can ensure the unidirectional flow of gas during gas injection, avoiding the nitrogen in the interlayer from mixing into the hydrogen in the inner tank 101 and affecting the purity of the gas in the tank. A vent disk 203b-1 is fixedly connected to the inlet of the first air inlet 203b before its check valve 203e. The vent disk 203b-1 is a solid disk of 3 / 4 circle. The vent disk 203b-1 can control the opening and closing of the first air inlet 203b through the commutation of the gas commutation valve 203.

[0055] Preferably, the driving column 203d-1 is a cylindrical solid column, and a limiting hole 203d-1a is formed on the outer side of its surface facing the outside. The limiting hole 203d-1a is square but not through, and its cross-sectional size and shape are the same as those of the limiting torsion rod 202e. When an external inflation device presses the inflation port 201, the inflation port 201 will push the intake assembly 202, so that the limiting torsion rod 202e is inserted into the limiting hole 203d-1a. At this time, the direction of the steering assembly 203d can be adjusted by rotating the reversing disc 201c to complete the switching of the gas passage. The driving column 203d-1 is also provided with a through hole 203d-1b. External gas enters the gas reversing valve 203 through the through hole 203d-1b and is respectively filled into different areas after being adjusted by the steering assembly 203d. The fixing rod 203d-2 and the two partition plates 203d-3 are both fixedly connected to the surface of the driving column 203d-1 facing the inner tank 101. The two partition plates 203d-3 are in close fit with the gas reversing valve 203. The angle between the two partition plates 203d-3 is about 60°. A closed area is formed between the inner wall of the gas reversing valve 203 and the two partition plates 203d-3. By the cooperation between the limiting torsion rod 202e and the limiting hole 203d-1a, the direction of the driving column 203d-1 is switched, so that this closed area faces the first intake port 203b or the second intake port 203c. The inner wall of the valve chamber of the gas reversing valve 203 is also provided with a limiting groove, so that the two fixed partition plates 203d-3 can only rotate within a certain range, that is, they can only be switched between the three directions of the first intake port 203b, abutting against the inner wall of the gas reversing valve 203 and the second intake port 203c, corresponding to the three states of hydrogen injection, airtight and nitrogen injection respectively.

[0056] In use, an external high-pressure inflation device is bolted to the inflation port 201 through the inflation flange 201b. After the connection is completed, the external device starts to inflate and apply pressure to the inflation port 201. The pressure can stretch the spring 202d to separate the piston 202b from the outer tank 103. When the pressure is sufficient, the piston 202b leaves the outer tank. At this time, the gas can flow to the gas reversing valve 203. The specific path is: external inflation device → inflation pipeline 201 → ventilation groove 202a → through hole 202c → gas reversing valve 203. After entering the gas reversing valve 203, the angle of the partition 203d-3 can be adjusted by rotating the reversing disk 201c clockwise or counterclockwise to face different directions, switching among the three directions of the first air inlet 203b, against the inner wall of the gas reversing valve 203, and the second air inlet 203c, corresponding to the three states of hydrogen injection, sealing, and carbon dioxide injection respectively. When hydrogen injection is required, rotate the switching turntable 301c clockwise. At this time, the gas flow path is: external inflation device → inflation pipeline 201a → ventilation groove 202a → through hole 202c → through through hole 203d-1b → the sealed area formed between the inner wall of the gas reversing valve 203 and the two partitions 203d-3 → ventilation disk 203b-1 → first air inlet 203b → check valve 203e → inner tank 101. When nitrogen injection is required, the gas path at this time is: external inflation device → inflation pipeline 201a → ventilation groove 202a → through hole 202c → through through hole 203d-1b → the sealed area formed between the inner wall of the gas reversing valve 203 and the two partitions 203d-3 → second air inlet 203c → check valve 303e → storage tank interlayer. In order to ensure the hydrogen concentration, before the hydrogen injection process, hydrogen can be injected into the interlayer between the inner and outer tanks first to empty the residual nitrogen in the switching valve.

[0057] In summary, by filling inert nitrogen in the interlayer between the inner and outer tanks, the present invention can effectively prevent the accidental leakage of high-pressure hydrogen from causing spontaneous combustion and gas cloud explosion, and by adjusting the same inflation device, it can respectively achieve the work of injecting nitrogen into the interlayer and high-pressure hydrogen injection, reducing the process and improving the work efficiency.

[0058] Embodiment 3

[0059] Referring to Figures 1 - 9 , which is the third embodiment of the present invention. It includes the above two embodiments, and is different from the above two embodiments in that: it further includes that the pressure relief cover 301 includes a plurality of holes 301a provided on its surface, and a threaded post 301b provided below the pressure relief cover 301.

[0060] The pressure relief member 303 includes an inner cylinder 303a provided outside the threaded post 301b, an outer cylinder 303b provided outside the inner cylinder 303a, and a one-way air outlet hole 303c provided outside the outer cylinder 303b.

[0061] The inner cylinder 303a includes a first through hole 303a-1 and an internal thread 303a-2 provided on the inner wall of the inner cylinder 303a;

[0062] The outer cylinder 303b includes a first compression spring 303b-1 provided above it and a second through hole 303b-2 provided on the surface of the outer cylinder 303b;

[0063] The one-way air outlet hole 303c includes an air outlet cavity 303c-1, a second compression spring 303c-2 provided in the air outlet cavity 303c-1, and a sealing plate 303c-3 provided on one side of the second compression spring 303c-2.

[0064] It should be noted that the pressure relief cover 301 is an inverted dish-shaped cover. The specific material can be a shape memory metal with good shape memory performance, such as nickel-titanium alloy, copper-zinc alloy, etc. The edge of the pressure relief cover 301 is fixedly connected to the bottom of the inner tank 101. Three holes 301a are evenly opened on the surface of the pressure relief cover 301. Ventilation columns 302 are respectively inserted into the holes 301a. The ventilation columns 302 are cylindrical, and their cross-sectional area is the same as the size of the holes 301a. They are inserted into the holes 301a. In the normal state, the pressure relief cover is sealed, and external hydrogen cannot enter the inside of the pressure relief cover. The ventilation columns 302 are fixedly connected to the bottom of the inner tank 101. On the other side, there is a limit cover with a radius slightly larger than the size of the hole to prevent the ventilation columns 302 from detaching from the holes 301a. A through hole is horizontally opened at the center of the ventilation columns 302 to allow the gas inside the inner tank 101 and the pressure relief cover 301 to flow through. In addition, a vertical threaded column 301b is fixedly connected to the center of the lower part of the pressure relief cover 301. When the pressure relief cover 301 is subjected to a large gas pressure, it will squeeze the threaded column 301b to make it descend. When it descends to a certain height, one side of the through hole of the ventilation column 302 is connected to the inner tank, and the other side is connected to the inside of the pressure relief cover 301. At this time, the gas can be relieved through the pressure relief member 303 below.

[0065] Preferably, the outer cylinder 303b is a columnar hollow cylinder, the inner wall of which fits the outer wall of the inner cylinder 303a. The outer cylinder 303b is fixedly connected between the inner tank 101 and the outer tank 103. A second through hole 303b-2 is opened on the outer wall of the outer cylinder 303b. The outside of the second through hole 303b-2 is fixedly connected to the one-way air outlet hole 303c. A first compression spring 303b-1 is fixedly connected above the outer cylinder 303b. This spring surrounds the threaded column 301b and is fixedly connected to the center of the bottom of the pressure relief cover 301. When the air pressure inside the inner tank exceeds the maximum bearing air pressure, the pressure relief cover 301 is pressed to drive the threaded column 301b to lower. At this time, the first compression spring 303b-1 starts to compress, and the gas is relieved through the ventilation column 301b.

[0066] Preferably, the inner cylinder 303a is a columnar hollow cylinder, and its inner wall is provided with internal threads 303a-2, which are engaged with the external threads on the surface of the threaded column 301b. When the pressure relief cover 301 is acted upon by gas pressure, the threaded column 301b will be squeezed and descend. At this time, since the threaded column 301b cannot rotate itself, the inner cylinder 303a will rotate accordingly. When rotating, the first through hole 303a-1 on the surface of the inner cylinder 303a will communicate with the second through hole 303b-2. At this time, since the inner tank contains high-pressure hydrogen, the hydrogen will be released from the inner tank 101 to the storage tank interlayer with a lower air pressure, completing the pressure relief of the hydrogen in the inner tank.

[0067] Preferably, inside the one-way air outlet 303c, the second compression spring 303c-2 is fixedly connected to the sealing plate 303c-3. The sealing plate 303c-3 is pressed against the second through hole 303b-2 under the extrusion of the second compression spring 303c-2. When the hydrogen in the inner tank 101 comes out, the hydrogen pushes the sealing plate 303c-3 to compress the second compression spring 303c-2, which can achieve the pressure relief of the hydrogen. Since the spring is extruded from the outside to the inside, the nitrogen in the interlayer cannot flow back, forming a one-way effect.

[0068] Preferably, there is a pressure sensor 304 inside the inner cylinder 303a. When the pressure relief cover 301 is pressed and drives the threaded column 301b to lower, the threaded column 301b will squeeze the pressure sensor 304, sending out a pressure signal and after being received and processed by an external signal receiver, an alarm can be issued. At this time, the operator can know that the pressure in the tank has reached the maximum value, and then can stop hydrogen injection and take emergency measures.

[0069] During use, when injecting hydrogen into the inner tank 101, when the hydrogen pressure reaches the maximum value, the hydrogen will squeeze the pressure relief cover 301, and the pressure relief cover 301 will overcome the elastic force of the first compression spring 303b-1 to make the threaded column 301 descend. When the threaded column 301 descends, through the engagement with the internal threads 303a-2 in the inner cylinder 303a, the inner cylinder 303a will rotate accordingly. When rotating, the first through hole 303a-1 on the surface of the inner cylinder 303a will communicate with the second through hole 303b-2. At this time, since the inner tank contains high-pressure hydrogen, the hydrogen will be released from the inner tank 101 to the storage tank interlayer with a lower air pressure, and the pressure relief of the hydrogen in the inner tank can be completed through the one-way air outlet 303c. At the same time, the threaded column 301b will squeeze the pressure sensor 304, sending out a pressure signal and after being received and processed by an external signal receiver, an alarm can be issued. At this time, the operator can know that the pressure in the tank has reached the maximum value, and then can stop hydrogen injection and take emergency measures.

[0070] In summary, by filling inert nitrogen gas in the interlayer between the inner and outer tanks, the present invention can effectively prevent accidents such as spontaneous combustion and vapor cloud explosion caused by accidental leakage of high-pressure hydrogen. By adjusting the direction of the same gas filling device, the operations of injecting nitrogen gas into the interlayer and injecting hydrogen into the inner tank can be respectively achieved, reducing processes and improving work efficiency. In addition, through a flexible pressure relief device, excessive hydrogen is relieved to the nitrogen interlayer, preventing the leaked hydrogen from coming into contact with the outside air and eliminating the explosion hazard. The hydrogen-nitrogen mixed gas in the interlayer can also be recycled, improving economic benefits and the safety performance of the storage tank at the same time.

[0071] Importantly, it should be noted that the construction and arrangement of the present application shown in multiple different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those skilled in the art who refer to this disclosure should easily understand that many modifications are possible without substantially departing from the novel teachings and advantages of the subject matter described in this application (for example, changes in the dimensions, scales, structures, shapes and proportions of various elements, and parameter values (such as temperature, pressure, etc.), installation arrangements, use of materials, colors, orientations, etc.). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature, number or position of discrete elements may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any clause of "means-plus-function" is intended to cover the structure that performs the recited function described herein, and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present invention. Therefore, the present invention is not limited to a specific embodiment, but extends to various modifications that still fall within the scope of the appended claims.

[0072] In addition, in order to provide a concise description of the exemplary embodiments, not all features of the actual embodiments may be described (i.e., those features that are not relevant to the currently considered best mode of implementing the present invention or those features that are not relevant to the implementation of the present invention).

[0073] It should be understood that in the development of any actual implementation, such as in any engineering or design project, a large number of specific implementation decisions may be made. Such development efforts may be complex and time-consuming, but for those ordinary technical personnel who benefit from this disclosure, without excessive experimentation, such development efforts will be a routine work of design, manufacturing and production.

[0074] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A hydrogen storage tank capable of automatically relieving pressure and alarming, characterized in that: including a storage unit (100), comprising an inner tank (101), a hydrogen outlet (102) provided on one side of the inner tank (101), an outer tank (103) provided outside the inner tank (101), a nitrogen outlet (104) provided on one side of the outer tank (103), and a support platform (105) provided below the outer tank (103); an inflation unit (200), comprising an inflation port (201), an intake assembly (202) provided on one side of the inflation port (201), and a gas commutation valve (203) provided on one side of the intake assembly (202); a pressure relief unit (300), comprising a pressure relief cover (301), a ventilation column (302) provided at the bottom of the inner tank (101), a pressure relief member (303) provided below the pressure relief cover (301), and a pressure sensor (304) provided at the bottom of the pressure relief member (303); the inflation port (201) comprises an inflation pipe (201a), an inflation flange (201b) provided on one side of the inflation pipe (201a), and a commutation disk (201c) provided outside the inflation pipe (201a); the intake assembly (202) comprises a ventilation groove (202a) provided on one side thereof, a piston (202b) provided on one side of the ventilation groove (202a), a through hole (202c) provided on one side of the piston (202b), a spring (202d) provided on one side of the piston (202b), and a limiting torsion bar (202e) provided on one side of the piston (202b); the ventilation groove (202a) communicates with the through hole (202c); the gas commutation valve (203) comprises a total intake port (203a) provided on one side thereof, a first intake port (203b) provided on the side opposite to the total intake port (203a), a second intake port (203c) provided on one side of the gas commutation valve (203), a steering assembly (203d) provided inside the gas commutation valve (203), and check valves (203e) provided in the first intake port (203b) and the second intake port (203c); the first intake port (203b) comprises a ventilation disk (203b-1) provided on one side thereof; the steering assembly (203d) comprises a driving column (203d-1), a fixing rod (203d-2) provided on one side of the driving column (203d-1), and partition plates (203d-3) provided on both sides of the fixing rod (203d-2); the driving column (203d-1) comprises a limiting hole (203d-1a) provided on one side thereof and a through through hole (203d-1b) provided inside the driving column (203d-1); the fixing rod (203d-2) comprises a torsion spring (203d-2a) provided inside thereof.

2. The hydrogen storage tank capable of automatically relieving pressure and alarming as described in claim 1, wherein: the pressure relief cover (301) comprises a plurality of holes (301a) provided on its surface and a threaded column (301b) provided below the pressure relief cover (301).

3. The hydrogen storage tank capable of automatically relieving pressure and alarming as described in claim 2, characterized in that: The pressure relief member (303) includes an inner cylinder (303a) disposed outside the threaded column (301b), an outer cylinder (303b) disposed outside the inner cylinder (303a), and a one-way air outlet hole (303c) disposed outside the outer cylinder (303b).

4. The hydrogen storage tank capable of automatically relieving pressure and giving an alarm according to claim 3, wherein: The inner cylinder (303a) includes a first through hole (303a-1) and an internal thread (303a-2) disposed on the inner wall of the inner cylinder (303a); The outer cylinder (303b) includes a first compression spring (303b-1) disposed above it and a second through hole (303b-2) disposed on the surface of the outer cylinder (303b); The one-way air outlet hole (303c) includes an air outlet cavity (303c-1), a second compression spring (303c-2) disposed in the air outlet cavity (303c-1), and a sealing plate (303c-3) disposed on one side of the second compression spring (303c-2).

Images