Anti-leakage safety protection device for hydrogen storage tank of modularized hydrogen energy fuel cell

Abstract

The invention discloses an anti-leakage safety protection device for a hydrogen storage tank of a modularized hydrogen energy fuel cell, and aims to provide the anti-leakage safety protection device for the hydrogen storage tank of the modularized hydrogen energy fuel cell, which can effectively solve the problem that a gas nozzle and a valve of the hydrogen storage tank fall off or are broken due to violent impact, so that a large amount of hydrogen leaks. The hydrogen storage tank leakage-proof safety protection device of the modularized hydrogen energy fuel cell is used for preventing leakage of a hydrogen storage tank of the modularized hydrogen energy fuel cell. The gas inlet and outlet pipeline is arranged on the hydrogen storage tank, one end of the gas inlet and outlet pipeline is located outside the hydrogen storage tank and connected with a gas nozzle, and the gas nozzle is connected with a valve; the sliding piston is arranged in the air inlet and outlet pipeline in a sliding manner; the firing pin is made of a fragile material and arranged in the air inlet and outlet pipeline, and a piston limiting part is arranged in the air inlet and outlet pipeline; the sliding piston abuts against one end of the firing pin under the action of the spring; a first through hole and a second through hole which are communicated with an inner hole of the gas inlet and outlet pipeline and an inner cavity of the hydrogen storage tank are formed in the gas inlet and outlet pipeline.

Description

Technical Field

[0001] The present invention relates to the field of hydrogen fuel cells utilizing hydrogen energy, and in particular to a hydrogen storage tank leakage prevention safety protection device for a modular hydrogen fuel cell. Background Art

[0002] With the rapid economic development of the century, the consumption of fossil energy has increased year by year, while the storage has decreased year by year. In addition, due to the inefficient "fuel" of fossil energy, a series of environmental pollution problems have been caused, which are seriously threatening the normal life of human beings. Based on this, it is imperative to build a clean, low-carbon, safe and efficient energy system, control the total amount of fossil energy, implement renewable energy substitution actions, deepen the reform of the power system, and build a new power system with new energy as the main body. Developing and large-scale use of clean energy and realizing a low-carbon economy have become the latest trends in the development of energy technology in the world today.

[0003] Since the generation of renewable energy such as solar energy and wind energy is subject to restrictions such as region, season, and time, it has discontinuous and unstable non-steady-state characteristics. Therefore, long-life, high-power, large-capacity, and low-cost energy storage technology will become an important means to ensure the effective use of renewable energy and the smooth and safe operation of power generation. Hydrogen has the highest energy storage density, especially in the field of large-scale storage. This technology is not limited by space and region and has good development prospects. Moreover, hydrogen is a by-product produced by most chemical and steel companies. Due to the lack of large-scale use, it is emptied and wasted in large quantities. If hydrogen energy storage and fuel cell technology are applied to large-scale use, as an auxiliary part of the power grid, and distributed power stations are established to achieve the effect of "peak shaving and valley filling", it will provide an important idea for the development of its new energy technology research. Fuel cells came into people's sight in this context. Fuel cells are low-pollution and efficient power generation devices that use hydrogen energy, a new energy source, as fuel without a combustion process. They are known as the fourth largest power generation method after thermal power generation, hydropower generation, and atomic power generation.

[0004] With the continuous development of hydrogen fuel cell technology, hydrogen storage technology has become an important way of energy storage. However, since the hydrogen storage tank stores high-pressure hydrogen, especially the gas nozzle and valve position of the tank are the weakest link, when subjected to severe impact, the gas nozzle and valve may be damaged (such as falling off or breaking), which will cause a large amount of hydrogen leakage and cause serious safety accidents. Based on this, the development of a hydrogen storage tank anti-leakage safety protection device is of great significance to ensure the safety of energy storage. Summary of the invention

[0005] The purpose of the present invention is to provide a hydrogen storage tank anti-leakage safety protection device for a modular hydrogen fuel cell that can effectively solve the problem of large-scale hydrogen leakage caused by the gas nozzle and valve of the hydrogen storage tank falling off or breaking due to severe impact, so as to ensure the safety of energy storage.

[0006] The technical solution of the present invention is: A hydrogen storage tank leakage prevention safety protection device for a modular hydrogen fuel cell includes an inlet and outlet gas pipeline arranged on the hydrogen storage tank, one end of the inlet and outlet gas pipeline is connected to the inner cavity of the hydrogen storage tank, and the other end of the inlet and outlet gas pipeline is located outside the hydrogen storage tank and connected to a gas nozzle, and a valve is connected to the gas nozzle; the hydrogen storage tank leakage prevention safety protection device also includes: A sliding piston, the sliding piston is slidably arranged in the air inlet and outlet pipes; The striker is made of a fragile material and is disposed in the air inlet and outlet pipes. A piston stopper is disposed in the air inlet and outlet pipes. The piston stopper, the striker and the air nozzle are located on the same side of the sliding piston. A spring is arranged in the air inlet and outlet pipes, and the sliding piston is pressed against one end of the striker under the action of the spring; The inlet and outlet pipes are provided with a first through hole and a second through hole connecting the inner hole of the inlet and outlet pipes with the inner cavity of the hydrogen storage tank. When the sliding piston abuts against one end of the striker, the first through hole and the second through hole are located on both sides of the sliding piston.

[0007] When the sliding piston abuts against the piston limiting portion, the first through hole and the second through hole are located on the same side of the sliding piston, and the first through hole and the air nozzle are located on both sides of the sliding piston.

[0008] When the hydrogen storage tank is in normal use, after the valve is opened, the hydrogen in the hydrogen storage tank enters the air inlet and outlet pipes through the first through hole or the second through hole, and then is output from the air nozzle, which does not affect the normal use of the hydrogen storage tank.

[0009] When the hydrogen storage tank is hit violently, causing the gas nozzle and valve to fall off or break, the striker will break because it is made of fragile materials, and the sliding piston will take the support. At this time, the sliding piston will float outward under the action of the spring and abut against the piston limiter. When the sliding piston abuts against the piston limiter, the first through hole and the second through hole are located on the same side of the sliding piston, and the first through hole and the gas nozzle are located on both sides of the sliding piston, so that the inlet and outlet pipes are closed by the sliding piston to prevent hydrogen leakage, so as to ensure the safety of energy storage.

[0010] Preferably, when the hydrogen storage tank is hit and the striker is broken, the sliding piston will be pressed against the piston limiter under the action of the spring. At this time, the first through hole and the second through hole are located on the same side of the sliding piston, and the first through hole and the gas nozzle are located on both sides of the sliding piston. In this way, when the hydrogen storage tank is hit violently and the striker is broken, the inlet and outlet pipes can be closed by the sliding piston to prevent hydrogen leakage, so as to ensure the safety of energy storage.

[0011] Preferably, at least part of the striker is located in the inlet and outlet pipes outside the hydrogen storage tank. In this way, when the hydrogen storage tank is hit violently, causing the nozzle and valve to fall off or break, the striker made of fragile material is guaranteed to break, and then the inlet and outlet pipes are closed by sliding the piston to prevent hydrogen leakage, thereby ensuring energy storage safety.

[0012] Preferably, the other end of the striker is against the gas nozzle. When the hydrogen storage tank is hit and the gas nozzle falls off, the sliding piston will be against the piston limiter under the action of the spring. At this time, the first through hole and the second through hole are located on the same side of the sliding piston, and the first through hole and the gas nozzle are located on both sides of the sliding piston. In this way, when the hydrogen storage tank is hit violently and the gas nozzle and valve fall off or break, even if the striker is not broken, the striker will lose support, so that the sliding piston floats outward under the action of the spring and presses against the piston limiter, thereby closing the inlet and outlet pipes to prevent hydrogen leakage and ensure energy storage safety.

[0013] Preferably, a hollow support portion is provided at the other end of the striker, the hollow support portion abuts against the gas nozzle, and the inner cavity of the hollow support portion is connected to the gas nozzle, and a connecting hole is provided on the side wall of the hollow support portion to connect the inner cavity of the hollow support portion with the inner hole of the inlet and outlet gas pipeline. In this way, when the hydrogen storage tank is in normal use, after the valve is opened, the hydrogen in the hydrogen storage tank enters the inlet and outlet gas pipeline through the first through hole or the second through hole, and then is output through the connecting hole and the gas nozzle, which does not affect the normal use of the hydrogen storage tank.

[0014] Preferably, the hollow support portion is tapered, and the outer diameter of the hollow support portion gradually increases from the sliding piston toward the air nozzle, which is conducive to improving the stability of the striker supported on the air nozzle by the hollow support portion.

[0015] Preferably, a support block is provided at one end of the striker, the area of ​​the end surface of the support block facing the sliding piston is larger than the cross section of the striker, and the end surface of the support block facing the sliding piston abuts against the sliding piston. This is conducive to improving the stability of the striker supported on the sliding piston by the support block.

[0016] Preferably, the inner wall of the air inlet and outlet pipe is provided with a step surface, and the step surface constitutes the piston limiter, so as to facilitate the time production of the piston limiter.

[0017] Preferably, the striker is a hollow structure or a solid structure. The striker is a hollow structure, which is conducive to breaking the striker when the hydrogen storage tank is hit violently, so as to close the inlet and outlet pipes by sliding the piston to prevent hydrogen leakage. The striker is a solid structure, which is convenient for manufacturing the striker.

[0018] The beneficial effects of the present invention are: When the hydrogen storage tank is in normal use, after the valve is opened, the hydrogen in the hydrogen storage tank enters the air inlet and outlet pipes through the first through hole or the second through hole, and then is output from the air nozzle, which does not affect the normal use of the hydrogen storage tank.

[0019] When the hydrogen storage tank is hit violently, causing the gas nozzle and valve to fall off or break, the striker will break because it is made of fragile materials, and the sliding piston will take the support. At this time, the sliding piston will float outward under the action of the spring and abut against the piston limiter. When the sliding piston abuts against the piston limiter, the first through hole and the second through hole are located on the same side of the sliding piston, and the first through hole and the gas nozzle are located on both sides of the sliding piston, so that the inlet and outlet pipes are closed by the sliding piston to prevent hydrogen leakage, so as to ensure the safety of energy storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic cross-sectional structure diagram of a modular hydrogen fuel cell hydrogen storage tank anti-leakage safety protection device of the present invention.

[0021] Figure 2 It is a partial structural schematic diagram of a striker of a hydrogen storage tank anti-leakage safety protection device of a modular hydrogen fuel cell of the present invention.

[0022] In the figure: Inlet and outlet pipes 1, piston limiter 1.1; Gas nozzle 2; Valve 3; Strike pin 4, hollow support portion 4.1, support block 4.2, communication hole 4.3; Sliding piston 5; Spring 6; A first through hole 7; A second through hole 8; Hydrogen storage tank 9. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments: Specific embodiment 1, as Figure 1As shown, a modular hydrogen fuel cell hydrogen storage tank anti-leakage safety protection device includes an inlet and outlet gas pipeline 1, a gas nozzle 2, a striker 4, a sliding piston 5 and a spring 6. The inlet and outlet gas pipeline 1 is arranged on the hydrogen storage tank 9. One end of the inlet and outlet gas pipeline is located outside the hydrogen storage tank and connected to the gas nozzle 2. A part of the inlet and outlet gas pipeline is located outside the hydrogen storage tank, and the other part of the inlet and outlet gas pipeline is located inside the hydrogen storage tank. A valve 3 is connected to the gas nozzle. The valve is a switch for opening and closing the output of hydrogen from the inside of the hydrogen storage tank to the outside.

[0024] The sliding piston 5 is slidably arranged in the air inlet and outlet pipes 1 .

[0025] The striker 4 is made of fragile material, for example, glass or ceramic. The striker 4 is arranged in the air inlet and outlet pipes. A piston stopper 1.1 is arranged in the air inlet and outlet pipes. The piston stopper, the striker and the air nozzle are located on the same side of the sliding piston.

[0026] The spring 6 is arranged in the air inlet and outlet pipes, and the spring and the striker are located on both sides of the sliding piston. The sliding piston is against one end of the striker under the effect of the spring.

[0027] The inlet and outlet pipe 1 is provided with a first through hole 7 and a second through hole 8 connecting the inner hole of the inlet and outlet pipe with the inner cavity of the hydrogen storage tank. In this embodiment, the first through hole and the second through hole are located in the hydrogen storage tank. There are one or more first through holes, and in this embodiment, there are multiple first through holes. There are one or more second through holes.

[0028] like Figure 1 As shown, when the sliding piston 5 abuts against one end of the striker 4, the first through hole and the second through hole are located on both sides of the sliding piston, and the first through hole and the air nozzle are located on the same side of the sliding piston.

[0029] When the sliding piston abuts against the piston limiting portion, the first through hole and the second through hole are located on the same side of the sliding piston, and the first through hole and the air nozzle are located on both sides of the sliding piston.

[0030] When the hydrogen storage tank is in normal use, after the valve is opened, the hydrogen in the hydrogen storage tank enters the inlet and outlet gas pipes through the first through hole and is then output from the gas nozzle, which does not affect the normal use of the hydrogen storage tank.

[0031] When the hydrogen storage tank is hit violently, causing the gas nozzle and valve to fall off or break, the striker will break because it is made of fragile materials, and the sliding piston will take the support. At this time, the sliding piston will float outward under the action of the spring and abut against the piston limiter. When the sliding piston abuts against the piston limiter, the first through hole and the second through hole are located on the same side of the sliding piston, and the first through hole and the gas nozzle are located on both sides of the sliding piston, so that the inlet and outlet pipes are closed by the sliding piston to prevent hydrogen leakage, so as to ensure the safety of energy storage.

[0032] Furthermore, when the hydrogen storage tank is hit and the striker is broken, the sliding piston will be pressed against the piston limiter under the action of the spring. At this time, the first through hole and the second through hole are located on the same side of the sliding piston, and the first through hole and the gas nozzle are located on both sides of the sliding piston. In this way, when the hydrogen storage tank is hit violently and the striker is broken, the inlet and outlet pipes can be closed by the sliding piston to prevent hydrogen leakage, thereby ensuring the safety of energy storage.

[0033] Further, such as Figure 1 As shown, at least part of the striker 4 is located in the inlet and outlet pipe 1 outside the hydrogen storage tank. In this embodiment, part of the striker is arranged in the inlet and outlet pipe outside the hydrogen storage tank, and the other part of the striker is arranged in the inlet and outlet pipe inside the hydrogen storage tank. In this way, when the hydrogen storage tank is subjected to a severe impact, causing the gas nozzle and the valve to fall off or break, it is ensured that the striker made of fragile material is broken, and then the inlet and outlet pipes are closed by sliding the piston to prevent hydrogen leakage, so as to ensure the safety of energy storage.

[0034] Further, such as Figure 1 As shown, the other end of the striker 4 is against the gas nozzle 2. When the hydrogen storage tank is hit and the gas nozzle falls off, the sliding piston will be against the piston limiter under the action of the spring. At this time, the first through hole and the second through hole are located on the same side of the sliding piston, and the first through hole and the gas nozzle are located on both sides of the sliding piston. In this way, when the hydrogen storage tank is hit violently and the gas nozzle and valve fall off or break, even if the striker is not broken, the striker will lose support, so that the sliding piston floats outward under the action of the spring and presses against the piston limiter, thereby closing the inlet and outlet pipes to prevent hydrogen leakage and ensure energy storage safety.

[0035] Further, such as Figure 1 As shown, a support block 4.2 is provided at one end of the striker, the area of ​​the end face of the support block facing the sliding piston is larger than the cross section of the striker, and the end face of the support block facing the sliding piston abuts against the sliding piston. In this way, the stability of the striker supported on the sliding piston by the support block is improved.

[0036] Further, such as Figure 1 , Figure 2 As shown, the other end of the striker 4 is provided with a hollow support part 4.1, the hollow support part abuts against the gas nozzle, and the inner cavity of the hollow support part is connected to the gas nozzle, and the side wall of the hollow support part is provided with a connecting hole 4.3 connecting the inner cavity of the hollow support part and the inner hole of the inlet and outlet pipe. In this way, when the hydrogen storage tank is in normal use, when the valve is opened, the hydrogen in the hydrogen storage tank enters the inlet and outlet pipe through the first through hole or the second through hole, and then is output through the connecting hole and the gas nozzle, which does not affect the normal use of the hydrogen storage tank.

[0037] Further, such as Figure 1 , Figure 2As shown, the hollow support portion 4.1 is tapered, and the outer diameter of the hollow support portion gradually increases from the sliding piston to the gas nozzle, which is conducive to improving the stability of the striker supported on the gas nozzle by the hollow support portion.

[0038] Further, such as Figure 1 As shown, the inner wall of the air inlet and outlet pipe 1 is provided with a step surface, and the step surface constitutes the piston limiter 1.1. In this way, the time production of the piston limiter is convenient.

[0039] In one implementation of this embodiment, the striker is a hollow structure. When the hydrogen storage tank is subjected to a severe impact, the striker is broken to close the inlet and outlet pipes through the sliding piston to prevent hydrogen leakage.

[0040] In another implementation of this embodiment, the firing pin is a solid structure, which is convenient for manufacturing the firing pin.

[0041] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent transformation made to the above embodiment based on the technical essence of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A modular hydrogen fuel cell hydrogen storage tank anti-leakage safety protection device, comprising an inlet and outlet gas pipeline arranged on the hydrogen storage tank, one end of the inlet and outlet gas pipeline is located outside the hydrogen storage tank and connected to a gas nozzle, and a valve is connected to the gas nozzle, wherein the valve is also provided. include: A sliding piston, the sliding piston is slidably arranged in the air inlet and outlet pipes; The striker is made of a fragile material and is disposed in the air inlet and outlet pipes. A piston stopper is disposed in the air inlet and outlet pipes. The piston stopper, the striker and the air nozzle are located on the same side of the sliding piston. A spring is arranged in the air inlet and outlet pipes, and the sliding piston is pressed against one end of the striker under the action of the spring; The inlet and outlet pipes are provided with a first through hole and a second through hole connecting the inner hole of the inlet and outlet pipes with the inner cavity of the hydrogen storage tank. When the sliding piston abuts against one end of the striker, the first through hole and the second through hole are located on both sides of the sliding piston.

2. The anti-leakage safety protection device for a hydrogen storage tank of a modular hydrogen fuel cell according to claim 1 is characterized in that: When the sliding piston abuts against the piston limiting portion, the first through hole and the second through hole are located on the same side of the sliding piston, and the first through hole and the air nozzle are located on both sides of the sliding piston.

3. The anti-leakage safety protection device for a hydrogen storage tank of a modular hydrogen fuel cell according to claim 1 is characterized in that: When the hydrogen storage tank is hit and the firing pin is broken, the sliding piston will press against the piston limit portion under the action of the spring. At this time, the first through hole and the second through hole are located on the same side of the sliding piston, and the first through hole and the gas nozzle are located on both sides of the sliding piston.

4. A modular hydrogen fuel cell hydrogen storage tank anti-leakage safety protection device according to claim 1, 2 or 3, characterized in that: At least a portion of the striker is arranged in the air inlet and outlet pipes outside the hydrogen storage tank.

5. A modular hydrogen fuel cell hydrogen storage tank anti-leakage safety protection device according to claim 1, 2 or 3, characterized in that: The other end of the striker is against the gas nozzle. When the hydrogen storage tank is hit and the gas nozzle falls off, the sliding piston will be against the piston limit part under the action of the spring. At this time, the first through hole and the second through hole are located on the same side of the sliding piston, and the first through hole and the gas nozzle are located on both sides of the sliding piston.

6. The anti-leakage safety protection device for a hydrogen storage tank of a modular hydrogen fuel cell according to claim 5 is characterized in that: The other end of the striker is provided with a hollow support portion, the hollow support portion rests on the air nozzle, and the inner cavity of the hollow support portion is connected to the air nozzle, and the side wall of the hollow support portion is provided with a connecting hole connecting the inner cavity of the hollow support portion and the inner hole of the inlet and outlet air pipe.

7. The anti-leakage safety protection device for a hydrogen storage tank of a modular hydrogen fuel cell according to claim 6 is characterized in that: The hollow support portion is tapered, and the outer diameter of the hollow support portion gradually increases from the sliding piston toward the air nozzle.

8. A modular hydrogen fuel cell hydrogen storage tank anti-leakage safety protection device according to claim 1, 2 or 3, characterized in that: A support block is provided at one end of the striker, the area of ​​the end surface of the support block facing the sliding piston is larger than the cross section of the striker, and the end surface of the support block facing the sliding piston abuts against the sliding piston.

9. A modular hydrogen fuel cell hydrogen storage tank anti-leakage safety protection device according to claim 1, 2 or 3, characterized in that: The inner wall of the air inlet and outlet pipes is provided with a step surface, and the step surface constitutes the piston limiting portion.

10. A modular hydrogen fuel cell hydrogen storage tank anti-leakage safety protection device according to claim 1, 2 or 3, characterized in that: The firing pin is a hollow structure or a solid structure.

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