Hydrogen storage bottle capable of supplying energy continuously and bottle group
By designing a sustainable energy-supply hydrogen storage bottle, including the bottle body, docking bin, bottle mouth valve and modular hydrogen bus system, the problems of difficulty in disassembly, inconvenient maintenance and unreliable electrical signals of hydrogen storage bottles are solved, and rapid replacement and efficient energy supply are achieved, improving the reliability and economic benefits of the equipment.
Patent Information
- Application Number
- CN202421811074.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-29
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-07-29
AI Technical Summary
The existing hydrogen storage bottles are difficult to disassemble, and cannot be replenished in time after disassembly, which is inconvenient to repair, unreliable electrical signal transmission and short service life, which limits its application in situations where frequent replacement or repair is required.
A sustainable energy-supply hydrogen storage bottle is designed, including a bottle body, docking chamber, bottle mouth valve, first one-way valve and second one-way valve. The bottle mouth valve is equipped with a live plug-and-exit interface and an interlocking mechanism. Combined with a modular hydrogen bus system, corrosion-resistant and high-strength materials are used to achieve rapid replacement and flexible combination.
It improves the repairability and rapid replacement of hydrogen storage bottles, reduces maintenance and replacement costs, extends service life, improves the utilization rate and safety of hydrogen energy, and promotes the promotion and application of clean energy.
Smart Images

Figure CN223063661U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of hydrogen storage, and particularly relates to a hydrogen storage bottle and a bottle group capable of sustainable power supply. Background Art
[0002] With the continuous development of new energy technologies, hydrogen energy, as a clean and efficient energy source, has been widely used in fields such as transportation, electricity, and industry. As a key device for hydrogen energy storage, the safety, reliability, and convenience of hydrogen storage bottles are crucial for the popularization and application of hydrogen energy. Most of the existing hydrogen bottle valves are fixedly installed on a single bottle body, and continuous power supply cannot be achieved after the bottle body is disassembled, which cannot meet the requirements of rapid replacement and repeated use.
[0003] However, during the uninterrupted power supply process, large-scale hydrogen energy power generation equipment is not convenient for mobile hydrogen refueling, and mobile equipment will be restricted by different hydrogen source positions and transportation distances, resulting in limited hydrogen supply, making the replacement of hydrogen storage bottles very frequent. The supply of hydrogen sources is limited by the capacity of the front-end storage equipment. Once a single bottle body is disassembled, timely supplementary power supply cannot be achieved; it is difficult to disassemble multiple bottle bodies during operation, and the safety of live disassembly is low. Moreover, the existing hydrogen storage bottles are inconvenient to repair: once the traditional overall interlocking structure of the bottle group is damaged, it needs to be replaced as a whole, which not only has a high repair cost but also a long repair cycle, bringing inconvenience to users. In addition, during the operation of the system, due to the fixed design of the traditional interlocking structure, it cannot be quickly replaced and reused, restricting its application in some occasions that require frequent replacement or repair. Although the combined valve in the prior art has an electric signal transmission function, due to problems in structural design or material selection, its electric signal transmission is unreliable, prone to misoperation or out-of-control. And due to limitations in materials, processes, etc., the service life of some combined valves in the prior art is short, increasing the use cost and maintenance workload. Summary of the Utility Model
[0004] An embodiment of the utility model provides a hydrogen storage bottle and a bottle group capable of sustainable power supply, aiming to solve the problems of difficult disassembly of existing hydrogen storage bottles, inability to achieve timely supplementary power supply after disassembly, inconvenient maintenance, inability to be quickly replaced, unreliable electric signal transmission, and short service life.
[0005] To solve the above problems, on the one hand, an embodiment of the utility model provides a hydrogen storage bottle capable of sustainable power supply, including a bottle body, a docking chamber, a bottle mouth valve, a first one-way valve, and a second one-way valve; the bottle mouth valve is arranged at the outlet end of the bottle body, and one end of the docking chamber is sleeved inside the end of the bottle mouth valve far from the bottle body; the first one-way valve and the second one-way valve are symmetrically arranged on the side of the docking chamber far from the bottle mouth valve, and the first one-way valve and the second one-way valve are respectively communicated with the docking chamber;
[0006] The docking chamber includes a chamber body and a plurality of chamber locks provided on the chamber body. The plurality of chamber locks are evenly arranged on the side of the chamber body close to one end of the bottle mouth valve; a microswitch is integrated inside one end of each chamber lock away from the bottle mouth valve.
[0007] As a preferred embodiment, the chamber body includes a cylindrical end and a cubic end integrally provided. The cylindrical end is sleeved inside the bottle mouth valve; one end of the chamber lock is provided on the cylindrical end.
[0008] As a preferred embodiment, the cylindrical end is adaptively arranged with the bottle mouth valve; the microswitch is arranged inside one end of the chamber lock away from the cylindrical end; the first one-way valve and the second one-way valve are symmetrically arranged on the side of the cubic end.
[0009] As a preferred embodiment, a plurality of fluid guides are arranged inside the bottle mouth valve close to the cylindrical end, and the plurality of fluid guides are arranged at equal intervals. In this application, the bottle mouth valve is generally made of materials with corrosion resistance, high strength and good sealing performance.
[0010] As a preferred embodiment, a safety valve and a pressure sensor are integrated inside the bottle mouth valve, and an electrically pluggable interface is provided on the bottle mouth valve. Through the electrically pluggable interface, it is convenient to connect with an external power supply and a control line. The electrically pluggable interface has functions such as waterproof, dustproof and anti-loosening, and can ensure that no electrical fault or hydrogen leakage will occur during the plugging and unplugging process. In this application, the safety valve can be a pressure relief valve, an overcurrent protector, etc., to ensure the safe operation of the system.
[0011] As a preferred embodiment, an interlock mechanism is arranged inside the bottle mouth valve; the interlock mechanism is a mechanical interlock mechanism or an electronic interlock mechanism. Through the interlock mechanism, it can be ensured that no misoperation will occur during the plugging and unplugging of the bottle mouth valve; during the process of plugging and unplugging the bottle mouth valve, it should be ensured that the valve of the bottle mouth valve is in a closed state to prevent hydrogen leakage.
[0012] As a preferred embodiment, the hydrogen storage bottle with sustainable energy supply is a heat-switching type hydrogen input / output storage bottle.
[0013] On the other hand, the embodiment of this application also provides a hydrogen storage bottle group with sustainable energy supply. The hydrogen storage bottle group with sustainable energy supply includes several groups of the hydrogen storage bottles with sustainable energy supply.
[0014] As a preferred embodiment, the hydrogen storage bottle group with sustainable energy supply includes a bottle-changing system and a hydrogen manifold system. The bottle-changing system is connected to the hydrogen manifold system through a connecting pipe; the bottle-changing system includes several groups of the hydrogen storage bottles with sustainable energy supply.
[0015] As a preferred embodiment, in the adjacent hydrogen storage bottles with sustainable energy supply, the second one-way valve of one hydrogen storage bottle with sustainable energy supply communicates with the first one-way valve of another hydrogen storage bottle with sustainable energy supply to form a communication point.
[0016] As a preferred embodiment, the connecting pipe includes a connecting main pipe and a plurality of connecting branch pipes, and the connecting branch pipes are arranged in one-to-one correspondence with the communication points; one end of the connecting branch pipe is connected to the connecting main pipe, and the other end is connected to the communication point; the connecting main pipe is connected to the hydrogen manifold system.
[0017] As a preferred embodiment, the hydrogen manifold system includes a primary pressure reducing valve, a secondary pressure reducing valve, a manifold tank and a solenoid valve; the primary pressure reducing valve is respectively connected to the connecting main pipe and the secondary pressure reducing valve; the manifold tank is respectively connected to the secondary pressure reducing valve and the solenoid valve.
[0018] As a preferred embodiment, the primary pressure reducing valve and the secondary pressure reducing valve are coaxial pressure reducing valves; a hydrogen pressure sensor is arranged between the primary pressure reducing valve and the secondary pressure reducing valve.
[0019] As a preferred embodiment, filters, one-way valves, unloading valves and differential pressure sensors are integrated in both the primary pressure reducing valve and the secondary pressure reducing valve. In this way, the pipeline combination connection and disassembly of the hydrogen storage system are made more concise, and gas pressure acquisition is realized.
[0020] As a preferred embodiment, the connecting main pipe is connected to the solenoid valve through a connecting valve.
[0021] Connected to the hydrogen storage bottle through the primary pressure reducing valve, the number of pipeline joints is effectively reduced, the complexity of the system is lowered, the layout of the hydrogen storage system is made more flexible, and it helps to achieve a more compact configuration in a limited space. The overall structural design of the hydrogen manifold system is compact, truly realizing "miniaturization", reducing costs and improving efficiency. By adopting a modular design, the unloading valve and one-way valve of the pressure reducing valve are highly integrated. This enables the pressure reducing valve to have significant advantages in terms of performance, structure, maintenance, etc., and can ensure that the valve can safely and effectively block hydrogen and prevent potential risks.
[0022] Compared with the prior art, the utility model has the following beneficial effects: by setting the bottle mouth valve and the docking chamber, the present application effectively improves the maintainability and quick replacement of the hydrogen storage bottle, thereby effectively improving the reliability and service life of the hydrogen storage bottle; by setting the one-way valve, the hydrogen storage bottle can be flexibly combined, so that the gas in the hydrogen storage bottle can reach the docking chamber through the combination valve for circulation and control, thereby improving the safety and convenience of the use of the hydrogen storage bottle. By setting the live plug-in interface on the bottle mouth valve, the maintenance and replacement costs can be effectively reduced, the maintenance cost of the equipment is low, the utilization rate and economic benefits of the equipment are improved, and the service life of the hydrogen storage bottle can be increased, the replacement frequency of the hydrogen storage bottle is reduced, and the use cost is further reduced. Through the structure of the present application, the utilization rate and safety of hydrogen energy can be improved, the promotion and application of clean energy can be promoted, which helps to reduce dependence on traditional fossil energy, reduce environmental pollution, and promote the optimization and sustainable development of energy structure. In addition, the use of the structure of the present application can also improve energy efficiency and safety in the fields of transportation, electricity, and industry. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0024] Figure 1 This is a schematic diagram of the overall structure of a hydrogen storage bottle for sustainable energy supply according to an embodiment of the present application;
[0025] Figure 2 yes Figure 1 Schematic diagram of the explosion structure of a hydrogen storage bottle with sustainable energy supply;
[0026] Figure 3 This is a schematic structural diagram of a hydrogen storage bottle group for sustainable energy supply according to another embodiment of the present application;
[0027] Figure 4 yes Figure 3 The electrical schematic diagram of the sustainable energy supply hydrogen storage bottle group to achieve switchable transmission / filling. DETAILED DESCRIPTION
[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0029] It should be noted that if there are directional indications (such as up, down, left, right, front, back, top, bottom...) involved in the embodiments of the present utility model, then such directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a certain specific posture (as shown in the drawings). If this specific posture changes, then the directional indications will also change accordingly.
[0030] In this application, unless otherwise clearly specified and defined, terms such as "installed", "connected", "connected to", "fixed" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0031] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time.
[0032] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, then such descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" can explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.
[0033] Specifically, on the one hand, as Figures 1 to 2 shown, the embodiments of the present utility model provide a hydrogen storage bottle with sustainable energy supply, including a bottle body 10, a docking chamber 20, a bottle mouth valve 30, a first one-way valve 40 and a second one-way valve 50; the bottle mouth valve 30 is disposed at the outlet end of the bottle body 10, and one end of the docking chamber 20 is sleeved inside the end of the bottle mouth valve 30 far from the bottle body 10; the first one-way valve 40 and the second one-way valve 50 are symmetrically disposed on the side of the docking chamber 20 far from the bottle mouth valve 30, and the first one-way valve 40 and the second one-way valve 50 are respectively communicated with the docking chamber 20;
[0034] The docking chamber 20 includes a chamber body 21 and a plurality of chamber locks 22 provided on the chamber body 21. The plurality of chamber locks 22 are evenly arranged on the side of the chamber body 21 close to one end of the bottle mouth valve 30; a micro switch (such as Figure 4 SQ1 - SQ3 in the figure) is integrated inside one end of each chamber lock 22 away from the bottle mouth valve 30.
[0035] As a preferred embodiment, the chamber body 21 includes a cylindrical end 211 and a cubic end 212 which are integrally arranged. The cylindrical end 211 is sleeved inside the bottle mouth valve 30; one end of the chamber lock 22 is arranged on the cylindrical end 211.
[0036] As a preferred embodiment, the cylindrical end 211 is adaptively arranged with the bottle mouth valve 30; the micro switch is arranged inside one end of the chamber lock 22 away from the cylindrical end 211; the first one - way valve 40 and the second one - way valve 50 are symmetrically arranged on the side of the cubic end 212.
[0037] As a preferred embodiment, a plurality of fluid guides 31 are arranged inside the bottle mouth valve 30 close to the cylindrical end 211, and the plurality of fluid guides 31 are arranged at equal intervals. In this application, the bottle mouth valve 30 is generally made of materials with corrosion resistance, high strength and good sealing performance.
[0038] As a preferred embodiment, a safety valve (not marked in the figure) and a pressure sensor (not marked in the figure) are integrated inside the bottle mouth valve 30, and a charged plug - and - play interface (not marked in the figure) is arranged on the bottle mouth valve 30. Through the charged plug - and - play interface, it is convenient to connect with an external power supply and a control line. The charged plug - and - play interface has functions such as waterproof, dust - proof and anti - loosening, and can ensure that no electrical fault or hydrogen leakage will occur during the plugging and unplugging process. In this application, the safety valve can be a pressure relief valve, an over - current protector, etc., to ensure the safe operation of the system.
[0039] As a preferred embodiment, an interlock mechanism 32 is arranged inside the bottle mouth valve 30; the interlock mechanism 32 is a mechanical interlock mechanism or an electronic interlock mechanism. Specifically, in this embodiment, the interlock mechanism 32 is a mechanical interlock mechanism. Through the interlock mechanism, it can be ensured that no misoperation will occur during the plugging and unplugging of the bottle mouth valve; during the process of plugging and unplugging the bottle mouth valve, it should be ensured that the valve of the bottle mouth valve is in a closed state to prevent hydrogen leakage.
[0040] As a preferred embodiment, the hydrogen storage bottle with sustainable energy supply is a heat - switchable hydrogen input / output storage bottle.
[0041] On the other hand, the embodiment of this application also provides a hydrogen storage bottle group with sustainable energy supply, and the hydrogen storage bottle group with sustainable energy supply includes several groups of the hydrogen storage bottles with sustainable energy supply.
[0042] As a preferred embodiment, the hydrogen storage bottle group with sustainable energy supply includes a bottle-changing system 100 and a hydrogen gas manifold system 200. The bottle-changing system 100 is connected to the hydrogen gas manifold system 200 through a connecting pipe 300. The bottle-changing system 100 includes a plurality of groups of the hydrogen storage bottles 101 with sustainable energy supply.
[0043] As a preferred embodiment, among the adjacent hydrogen storage bottles 101 with sustainable energy supply, the second one-way valve of one hydrogen storage bottle with sustainable energy supply is communicated with the first one-way valve of another hydrogen storage bottle 101 to form a communication point 400.
[0044] As a preferred embodiment, the connecting pipe 300 includes a connecting main pipe 301 and a plurality of connecting branch pipes 302. The connecting branch pipes 302 are arranged in one-to-one correspondence with the communication points 400. One end of the connecting branch pipe 302 is connected to the connecting main pipe 301, and the other end is connected to the communication point 400. The connecting main pipe 301 is connected to the hydrogen gas manifold system 200.
[0045] As a preferred embodiment, the hydrogen gas manifold system 200 includes a first-stage pressure reducing valve 201, a second-stage pressure reducing valve 202, a converging tank 203 and a solenoid valve 204. The first-stage pressure reducing valve 201 is respectively connected to the connecting main pipe 301 and the second-stage pressure reducing valve 202. The converging tank 203 is respectively connected to the second-stage pressure reducing valve 202 and the solenoid valve 204. Through the solenoid valve 204, it can be connected to the fuel cell stack for operation.
[0046] As a preferred embodiment, the first-stage pressure reducing valve 201 and the second-stage pressure reducing valve 202 are coaxial pressure reducing valves. A hydrogen gas pressure sensor P is arranged between the first-stage pressure reducing valve 201 and the second-stage pressure reducing valve 202.
[0047] As a preferred embodiment, both the first-stage pressure reducing valve 201 and the second-stage pressure reducing valve 202 are integrated with a filter, a one-way valve, a relief valve and a differential pressure sensor. In this way, the pipeline combination connection and disassembly of the hydrogen storage system are more concise, and gas pressure acquisition is realized.
[0048] As a preferred embodiment, the connecting main pipe 301 is connected to the solenoid valve 204 through a connecting valve 500.
[0049] Connected to the hydrogen storage cylinder through a primary pressure reducing valve, the number of pipeline joints is effectively reduced, the complexity of the system is lowered, the layout of the hydrogen storage system becomes more flexible, and it helps to achieve a more compact configuration within a limited space. The overall structural design of the hydrogen manifold system is compact, truly realizing "miniaturization", reducing costs and improving efficiency. By adopting a modular design, the unloading valve and check valve of the pressure reducing valve are highly integrated. This enables the pressure reducing valve to have significant advantages in terms of performance, structure, maintenance, etc., and can ensure that the valve can safely and effectively block hydrogen and prevent potential risks.
[0050] In this application, by setting up a bottle mouth valve and a docking chamber, the maintainability and rapid replaceability of the hydrogen storage cylinder are effectively improved, thereby effectively enhancing the reliability and service life of the hydrogen storage cylinder; by setting up a check valve, the combination of hydrogen storage cylinders can be flexibly carried out, enabling the gas in the hydrogen storage cylinder to reach the docking chamber through the combination valve for circulation and control, improving the safety and convenience of using the hydrogen storage cylinder. By setting up a hot-swap interface on the bottle mouth valve, the maintenance and replacement costs can be effectively reduced, the maintenance cost of the equipment is low, the utilization rate and economic benefits of the equipment are improved, and the service life of the hydrogen storage cylinder can be increased, reducing the replacement frequency of the hydrogen storage cylinder and further lowering the usage cost. Through the structure of this application, the utilization rate and safety of hydrogen energy can be improved, the promotion and application of clean energy can be promoted, it helps to reduce the dependence on traditional fossil energy, reduce environmental pollution, and promote the optimization and sustainable development of the energy structure. Moreover, the use of the structure of this application can also improve the energy efficiency and safety in fields such as transportation, electricity, and industry.
[0051] The above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made under the inventive concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the present utility model.
Claims
1. A hydrogen storage bottle with sustainable energy supply, characterized in that, It includes a bottle body, a docking chamber, a bottle mouth valve, a first check valve and a second check valve; the bottle mouth valve is arranged at the outlet end of the bottle body, and one end of the docking chamber is sleeved inside the end of the bottle mouth valve far away from the bottle body; the first check valve and the second check valve are symmetrically arranged on the side of the docking chamber far away from the bottle mouth valve, and the first check valve and the second check valve are respectively communicated with the docking chamber; The docking chamber includes a chamber body and a plurality of chamber locks arranged on the chamber body, and the plurality of chamber locks are evenly arranged on the side of the chamber body close to the bottle mouth valve; a micro switch is integrated at one end of each chamber lock far away from the bottle mouth valve.
2. The hydrogen storage bottle with sustainable energy supply according to claim 1, characterized in that, The chamber body includes a cylindrical end and a cubic end which are integrally arranged, and the cylindrical end is sleeved inside the bottle mouth valve; one end of the chamber lock is arranged on the cylindrical end.
3. The hydrogen storage bottle with sustainable energy supply according to claim 2, characterized in that, The cylindrical end is arranged in a matching manner with the bottle mouth valve; the micro switch is arranged inside the end of the chamber lock far away from the cylindrical end; the first check valve and the second check valve are symmetrically arranged on the side of the cubic end; A plurality of fluid guides are arranged inside the bottle mouth valve close to the cylindrical end, and the plurality of fluid guides are arranged at equal intervals.
4. The hydrogen storage bottle with sustainable energy supply according to claim 1, characterized in that, A safety valve and a pressure sensor are integrated inside the bottle mouth valve, and a live pluggable interface is arranged on the bottle mouth valve.
5. The hydrogen storage bottle with sustainable energy supply according to claim 1, characterized in that, An interlock mechanism is arranged inside the bottle mouth valve; the interlock mechanism is a mechanical interlock mechanism or an electronic interlock mechanism; The hydrogen storage bottle with sustainable energy supply is a heat-switching type hydrogen input / injection storage bottle.
6. A hydrogen storage bottle group for sustainable energy supply, characterized in that, The hydrogen storage bottle group with sustainable energy supply includes several hydrogen storage bottles with sustainable energy supply according to any one of claims 1 to 5.
7. The hydrogen storage bottle group with sustainable energy supply according to claim 6, characterized in that, The hydrogen storage bottle group with sustainable energy supply includes a bottle changing system and a hydrogen manifold system, and the bottle changing system is connected with the hydrogen manifold system through a connecting pipe; the bottle changing system includes several hydrogen storage bottles with sustainable energy supply according to any one of claims 1 to 5.
8. The hydrogen storage bottle group with sustainable energy supply according to claim 7, characterized in that, Among the adjacent hydrogen storage bottles with sustainable energy supply, the second check valve of one hydrogen storage bottle with sustainable energy supply is communicated with the first check valve of another hydrogen storage bottle with sustainable energy supply to form a communication point; The connecting pipe includes a connecting main pipe and several connecting branch pipes, and the connecting branch pipes are arranged in one-to-one correspondence with the communication points; one end of the connecting branch pipe is connected with the connecting main pipe, and the other end is connected with the communication point; the connecting main pipe is connected with the hydrogen manifold system.
9. The hydrogen storage bottle group with sustainable energy supply according to claim 8, characterized in that, The hydrogen manifold system includes a first-stage pressure reducing valve, a second-stage pressure reducing valve, a manifold tank and an electromagnetic valve; the first-stage pressure reducing valve is respectively connected with the connecting main pipe and the second-stage pressure reducing valve; the manifold tank is respectively connected with the second-stage pressure reducing valve and the electromagnetic valve.
10. The hydrogen storage bottle group with sustainable energy supply according to claim 9, characterized in that, The first-stage pressure reducing valve and the second-stage pressure reducing valve are coaxial pressure reducing valves; a hydrogen pressure sensor is arranged between the first-stage pressure reducing valve and the second-stage pressure reducing valve; Filters, check valves, unloading valves and differential pressure sensors are integrated inside both the first-stage pressure reducing valve and the second-stage pressure reducing valve; The connecting main pipe is connected with the electromagnetic valve through a connecting valve.