Self-controlled stable voltage hydrogen supply system prying module

Abstract

A self-control stable voltage hydrogen supply system pry dress module includes gas storage structure, first gas pressure detection device, first stop valve, gas filter, first pressure reducing valve, second gas pressure detection device, first pressure relief valve, second stop valve, second pressure reducing valve, third gas pressure detection device, third stop valve, second pressure relief valve, electric control valve, fourth stop valve, gas component detection device, gas interface; It also includes control unit, control unit real-time monitoring first gas pressure detection device, second gas pressure detection device and third gas pressure detection device's pressure data, and gas component detection device's gas data, control electric control valve's on-off to gas pipeline. The utility model solves the prior art hydrogen supply system pressure is not stable and is easy to cause equipment damage, no multi-node pressure monitoring is easy to leak and is judged abnormally, can not real-time monitoring gas state and the problem of fast screening qualified gas.

Description

Technical Field

[0001] This utility model belongs to the field of gas transmission, and in particular relates to a skid-mounted module for a self-controlled and pressure-stabilized hydrogen supply system. Background Technology

[0002] In the chemical, energy, and hydrogen energy industries, a safe and stable supply of combustible gases (such as hydrogen, natural gas, and propane) is a core prerequisite for ensuring the normal operation of production equipment. Hydrogen pipeline skid-mounted systems, as an integrated and modular gas delivery and control solution, integrate key components such as gas delivery pipelines, pressure regulating elements, flow control devices, safety protection components, and monitoring modules onto a movable skid base through standardized design. This offers advantages such as convenient installation, small footprint, strong adaptability, and high operation and maintenance efficiency. It can be widely applied in scenarios such as distributed energy supply, industrial gas production, and hydrogen fuel cell power supply, effectively solving the problems of long installation cycles, poor compatibility, and difficult relocation associated with traditional on-site welded pipeline systems.

[0003] In a skid-mounted hydrogen pipeline system, the gas supply module is the core hub connecting the gas source and the downstream gas-consuming system. It undertakes key functions such as gas reception, pretreatment, pressure regulation, flow stabilization, and preliminary safety control. The performance of the gas supply module directly determines the reliability and safety of the gas supply of the entire skid-mounted system, and is the foundation for ensuring the stable operation of downstream gas-consuming equipment (such as fuel cell stacks, industrial reactors, precision testing instruments, etc.).

[0004] Existing skid-mounted modules in automated pressure-stabilized hydrogen supply systems suffer from low pressure and flow control accuracy and poor stability. They often employ single-stage or simple multi-stage pressure reduction structures, lacking an effective pressure-flow linkage regulation mechanism. When the gas source pressure fluctuates (such as a sudden pressure drop during container cylinder switching or pressure fluctuations in hydrogen production from electrolysis equipment) or downstream gas consumption changes abruptly, the module's output gas pressure and flow rate are prone to significant fluctuations, making rapid pressure and flow rebalancing impossible. These fluctuations not only lead to unstable operating conditions for gas-consuming equipment but also cause irreversible damage to precision instruments, pipeline seals, and core components of downstream gas-consuming systems under pressure shocks, shortening equipment lifespan and even posing a risk of pipeline leaks.

[0005] Most existing gas supply modules are only equipped with basic pressure indicators. When critical situations such as overpressure or unqualified gas purity occur, they cannot quickly trigger automatic shut-off, directional venting, or pressure compensation measures. This can easily lead to the accumulation of dangerous gases, overpressure pipe bursts, and other safety accidents. In particular, for flammable and explosive gases such as hydrogen, the above-mentioned defects will significantly increase the safety risks. Utility Model Content

[0006] The purpose of this utility model is to provide a skid-mounted module for a self-controlled and pressure-stabilized hydrogen supply system, so as to solve the technical problems of existing hydrogen supply systems, such as unstable pressure that easily causes equipment damage, lack of multi-node pressure monitoring that easily leads to missed detection of anomalies, and inability to monitor gas status in real time and quickly screen qualified gases.

[0007] To achieve the above objectives, the specific technical solution of the skid-mounted module of the self-controlled and voltage-stabilized hydrogen supply system of this utility model is as follows:

[0008] A skid-mounted module for an automated pressure-stabilized hydrogen supply system includes a gas storage structure, a first gas pressure detection device, a first shut-off valve, a gas filter, a first pressure reducing valve, a second gas pressure detection device, a first pressure relief valve, a second shut-off valve, a second pressure reducing valve, a third gas pressure detection device, a third shut-off valve, a second pressure relief valve, an electrically controlled valve, a fourth shut-off valve, a gas composition detection device, a fifth shut-off valve, and a gas interface, arranged sequentially along a gas pipeline.

[0009] The gas storage structure is used for storing hydrogen; the first, second, third, fourth, and fifth shut-off valves are used to control the on / off state of corresponding positions in the gas transmission pipeline; the gas filter is used to remove impurities from the gas in the gas transmission pipeline; the first and second pressure reducing valves are used for two pressure reductions of the hydrogen; the first, second, and third pressure detection devices are used for detecting the gas pressure at corresponding positions in the gas transmission pipeline; the first and second pressure relief valves are used to release hydrogen pressure when it exceeds a pressure threshold; the gas composition detection device is used to detect the composition of the hydrogen; and the gas interface is used to connect the gas transmission pipeline to the gas-using equipment.

[0010] It also includes a control unit, which monitors in real time the pressure data of the first pressure detection device, the second pressure detection device and the third pressure detection device, as well as the gas composition data of the gas composition detection device, and controls the on / off of the gas pipeline by the electronically controlled valve.

[0011] As a further improvement of this utility model, the gas transmission pipeline is also provided with a purging interface for connection with a purging module. The purging module is used to input purging gas into the gas transmission pipeline to purge and replace hydrogen.

[0012] As a further improvement of this utility model, the gas composition detection device includes a hydrogen detector and an oxygen detector, used to detect the purity of hydrogen and the content of oxygen.

[0013] As a further improvement of this utility model, the purging module is activated under the control of the control unit. When the volume content of hydrogen in the gas transmission pipeline is ≤96% or the volume content of oxygen is ≥4%, the purging module releases purging gas into the gas transmission pipeline. When the volume content of oxygen is ≤0.5%, the control unit disconnects the connection between the purging module and the gas transmission pipeline.

[0014] As a further improvement of this utility model, the control unit monitors the data fed back by the gas composition detection device, and releases hydrogen to the gas-using equipment through the gas-using interface when the oxygen volume content is ≤0.5% and the hydrogen volume content is ≥99.995%.

[0015] As a further improvement of this utility model, the gas filter has a filtration accuracy greater than 800 mesh.

[0016] As a further improvement of this utility model, the hydrogen gas has a pressure of 1.5 to 1.6 MPa after passing through the first pressure reducing valve and a pressure of 0.5 to 0.8 MPa after passing through the second pressure reducing valve.

[0017] As a further improvement of this utility model, the gas storage structure is provided with a reserved interface for increasing the supply source of hydrogen.

[0018] As a further improvement of this utility model, the hydrogen is hydrogen gas, the gas storage structure includes a hydrogen container cylinder and an electrolytic hydrogen production device, and the gas storage structure and the gas transmission pipeline are connected by a metal corrugated pipe.

[0019] As a further improvement of this utility model, the gas released by the first pressure relief valve and the second pressure relief valve is discharged through the exhaust port, and an active exhaust pipe is provided between the exhaust port and the gas transmission pipeline, and a sixth shut-off valve is provided on the active exhaust pipe.

[0020] Beneficial effects:

[0021] A first and second pressure-reducing valve are sequentially installed along the gas pipeline, forming a two-stage pressure reduction structure. This gradually reduces the high-pressure hydrogen at the gas source to a pressure range suitable for downstream equipment, avoiding the sudden pressure rises and falls that occur with existing single-stage pressure reduction structures when the gas source pressure fluctuates or the gas consumption changes. This staged pressure reduction design effectively buffers pressure changes, preventing irreversible damage to downstream hydrogen system instruments, pipeline interface seals, and core components of hydrogen-using equipment caused by high-pressure shocks, ensuring long-term stable operation of the equipment, and meeting the differentiated pressure requirements of different gas-using equipment. The first, second, and third pressure detection devices correspond to key nodes after the gas source, after the first-stage pressure reduction, and after the second-stage pressure reduction of the gas pipeline, respectively, and can collect gas pressure data at each stage in real time. Compared to existing systems that only perform single-point detection or lack real-time monitoring, this design can comprehensively grasp the pressure status of the entire gas transmission process. Once the pressure exceeds the set range, it can provide timely data support for subsequent control actions, avoiding equipment failures or safety risks caused by undetected pressure anomalies.

[0022] The first to fifth shut-off valves correspond to the downstream of the gas storage structure, before and after the first-stage pressure reduction, after the second-stage pressure reduction, before and after the gas composition detection, and at the gas consumption interface end of the gas pipeline, forming a "segmented and controllable" pipeline layout. When a functional component (such as a gas filter or the first pressure reducing valve) needs to be repaired or replaced, the shut-off valve in the corresponding area can be closed (e.g., closing the first and second shut-off valves when repairing a gas filter), cutting off the local pipeline airflow without affecting the normal operation of other areas. This completely solves the problem of flow interruption caused by the "overall gas shut-off required for maintenance" in the existing gas supply system, ensuring a continuous and stable gas supply to downstream gas-consuming equipment. Simultaneously, in emergency situations (such as pipeline leaks or sudden pressure increases), the airflow in dangerous areas can be quickly cut off by closing the corresponding shut-off valves, reducing the risk of accident escalation and improving the safety and flexibility of system operation and maintenance.

[0023] The control unit can collect pressure data from the first, second, and third pressure detection devices and gas composition data from the gas composition detection device in real time. Compared to existing systems that cannot monitor the gas state in the pipeline in real time, this design can comprehensively and dynamically monitor gas pressure and composition information, promptly detecting problems such as abnormal pressure (e.g., overpressure, underpressure) and unqualified gas composition (e.g., excessive impurity content), avoiding safety hazards caused by information lag. Based on the monitored pressure and composition data, the control unit automatically controls the opening and closing of the electrically controlled valve: only when the pressure meets the downstream gas requirements and the gas composition is up to standard will the electrically controlled valve be opened, allowing gas to enter subsequent pipelines and gas-using equipment; if the pressure is abnormal or the gas composition is unqualified, the electrically controlled valve remains closed to prevent unqualified gas from entering the gas-using equipment. This "monitor first, supply later" intelligent control logic completely solves the problem of existing systems being unable to quickly screen qualified gases, avoiding equipment damage (e.g., impurities clogging equipment channels) or safety accidents (e.g., unstable combustion caused by insufficient hydrogen purity) due to unqualified gas pressure or composition, ensuring the safety and compliance of the gas supply.

[0024] The first and second pressure relief valves correspond to pressure protection after the first and second stage of pressure reduction, respectively. When the pressure in the corresponding area exceeds the safety threshold, the pressure relief valve can automatically open to release the overpressure gas and reduce the pressure in the pipeline to a safe range. This avoids serious accidents such as pipeline rupture and component damage caused by excessive pressure, providing double safety nets for the gas transportation process. Especially for high-risk media such as hydrogen, it significantly improves the system's risk resistance. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a skid-mounted module structure of a self-controlled and voltage-stabilized hydrogen supply system according to this utility model;

[0026] The markings in the diagram are as follows: 1. Gas pipeline; 2. Gas storage structure; 3. First gas pressure detection device; 4. First shut-off valve; 5. Gas filter; 6. First pressure reducing valve; 7. Second gas pressure detection device; 8. First pressure relief valve; 9. Second shut-off valve; 10. Second pressure reducing valve; 11. Third gas pressure detection device; 12. Third shut-off valve; 13. Second pressure relief valve; 14. Electrically controlled valve; 15. Fourth shut-off valve; 16. Gas composition detection device; 161. Oxygen detector; 162. Hydrogen detector; 17. Fifth shut-off valve; 18. Gas input interface; 19. Purge interface; 20. Exhaust port; 21. Sixth shut-off valve; 22. Reserved interface. Detailed Implementation

[0027] To enhance understanding of this utility model, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. These embodiments are only used to explain the present utility model and do not constitute a limitation on the scope of protection of the present utility model.

[0028] Implementation example:

[0029] like Figure 1 The illustrated self-controlled pressure-stabilized hydrogen supply system skid-mounted module, starting from the gas storage structure and proceeding along the gas pipeline, includes, in sequence, a first gas pressure detection device, a first shut-off valve, a gas filter, a first pressure reducing valve, a second gas pressure detection device, a first pressure relief valve, a second shut-off valve, a second pressure reducing valve, a third gas pressure detection device, a third shut-off valve, a second pressure relief valve, an electrically controlled valve, a fourth shut-off valve, a gas composition detection device, a fifth shut-off valve, a gas supply interface, and a control unit.

[0030] The gas storage structure 2 uses a containerized steel cylinder group to store high-pressure hydrogen as a gas source reserve device for the system. It is connected to the beginning of the gas transmission pipeline 1 via a flexible metal bellows connection, which can absorb equipment vibration and reduce wear on pipeline interfaces. The gas storage structure 2 is also equipped with a reserved interface 22, which can be expanded to connect new gas sources (such as adding electrolytic hydrogen production equipment or spare cylinder groups) to improve gas supply redundancy.

[0031] The first air pressure detection device 3 uses a pressure transmitter, which is installed on the gas pipeline 1 between the gas storage structure 2 and the first shut-off valve 4. It detects the initial gas pressure output by the gas storage structure 2 in real time and transmits the pressure signal to the control unit to provide the original pressure data for subsequent pressure reduction and adjustment.

[0032] The first shut-off valve 4 is a ball valve located downstream of the first gas pressure detection device 3. It is used to cut off or open the gas passage from the gas storage structure to the downstream pipeline. It remains open under normal operating conditions and closes when the downstream filter or pressure reducing valve is being repaired or in case of emergency gas shutdown, thus achieving isolation control at the gas source end.

[0033] Gas filter 5 uses a stainless steel filter element with a filtration accuracy of 800 mesh and is installed downstream of the first shut-off valve 4. It has multiple layers of filter screens inside, which can intercept mechanical impurities such as rust, welding slag, and dust carried in the gas, preventing these impurities from entering subsequent precision components and causing wear or blockage, thus ensuring the service life of downstream equipment.

[0034] The first pressure reducing valve 6 is a pilot-operated pressure reducing valve, with its inlet connected to the outlet of the gas filter 5. It is used to reduce the pressure of upstream high-pressure hydrogen to 1.5 MPa in the first stage. It automatically adjusts its opening degree through a built-in pressure feedback mechanism to ensure that the outlet pressure remains stable within the set range, providing a base pressure for the second stage pressure reduction.

[0035] The second pressure detection device 7, consisting of a pressure indicator and a pressure transmitter, is installed on the outlet side of the first pressure reducing valve to monitor the gas pressure after the first stage of pressure reduction in real time. On one hand, it displays the pressure locally for maintenance personnel to view; on the other hand, it transmits the pressure signal to the control unit to monitor the pressure reduction effect of the first pressure reducing valve 6. If the pressure exceeds 1.6 MPa, an alarm is triggered.

[0036] The first pressure relief valve 8 is a spring-loaded safety valve, connected to the downstream pipeline of the second air pressure detection device 7, and is set to open at a pressure of 1.7 MPa (higher than the maximum output pressure of the first pressure reducing valve). When the pressure rises abnormally after the first-stage pressure reduction and exceeds the set value, the first pressure relief valve automatically opens, allowing the overpressure gas to be discharged through the exhaust pipe, thus preventing high-pressure gas from impacting the downstream pipeline.

[0037] The second shut-off valve 9 is a ball valve identical to the first shut-off valve 4, located downstream of the first pressure relief valve 8 and upstream of the second pressure reducing valve 10. It is used to close during maintenance of the second pressure reducing valve 10 or downstream components, cutting off the gas passage after the first-stage pressure reduction, thus isolating the pressure reducing section and preventing gas leakage.

[0038] The second pressure reducing valve 10 is identical to the first pressure reducing valve 6, with its inlet connected to the outlet of the second shut-off valve 9. It further reduces the pressure of the gas after the first-stage pressure reduction to 0.5-0.8 MPa, meeting the low-pressure requirements of downstream gas-consuming equipment (such as fuel cells and precision instruments). Its response speed is ≤0.5 seconds, which can quickly compensate for pressure changes caused by fluctuations in gas consumption.

[0039] The third air pressure detection device 11 uses a high-precision pressure transmitter, installed on the outlet side of the second pressure reducing valve 10, to detect the gas pressure after the secondary pressure reduction in real time and transmit the data to the control unit. If the pressure exceeds the range of 0.5-0.8 MPa, the control unit will trigger subsequent safety measures.

[0040] The third shut-off valve 12 is located between the third air pressure detection device 11 and the second pressure relief valve 13. It is used to cut off the gas pipeline 1 when the downstream component is under maintenance, so as to ensure maintenance safety and not affect the upstream pressure regulation system.

[0041] The second pressure relief valve 13 is set to open at a pressure of 0.9 MPa and is connected to the downstream pipeline of the third gas pressure detection device 11, serving as a safety protection after secondary pressure reduction. When the second pressure reducing valve malfunctions and causes the outlet pressure to exceed the limit, the second pressure relief valve automatically opens to release pressure, protecting downstream gas-using equipment from overpressure damage.

[0042] The electrically controlled valve 14 is an electromagnetically driven ball valve, controlled by a signal from the control unit, and installed downstream of the second pressure relief valve 13. It is closed under normal operating conditions and is only energized to open when the control unit confirms that the pressure and composition are qualified, allowing gas to enter the subsequent detection and gas consumption stages. It is the "final switch" for gas supply.

[0043] The fourth shut-off valve 15 is located between the solenoid valve 14 and the gas composition detection device 16. It is used to close the gas composition detection device during maintenance to cut off the airflow and ensure maintenance safety without affecting the upstream pressure regulation system.

[0044] The gas composition detection device 16 integrates a hydrogen purity meter 162 and an oxygen detector 161, and is installed downstream of the fourth shut-off valve 15. It analyzes the hydrogen purity and oxygen content in the gas in real time, and transmits the detection data to the control unit as the basis for judging whether the gas is qualified.

[0045] The fifth shut-off valve 17 is located between the gas composition detection device 16 and the gas interface 18. It is used to close when the gas-using equipment is not in use or when the interface is under maintenance, cutting off the supply of qualified gas to the gas-using end and preventing gas leakage.

[0046] Gas interface 18 adopts a standardized quick connector, which serves as the connection end between the gas supply module and downstream gas-consuming equipment. It can be quickly plugged in and unplugged, and is compatible with different models of gas-consuming equipment interfaces.

[0047] The purging port 19 is located upstream of the gas pipeline 1 at the outlet of the gas storage structure 2 and is connected to the purging module. When the gas in the pipeline is not up to standard, the control unit controls the purging module to start, and nitrogen is introduced into the pipeline through the purging port to replace the hydrogen or air in the pipeline.

[0048] The exhaust port 20 uses a high-altitude discharge pipe, which is connected to the first pressure relief valve 8 and the second pressure relief valve 13 respectively. Its end is equipped with a rain cap and a fireproof net to safely discharge the depressurized gas or replacement exhaust gas into the atmosphere, preventing accumulation around the equipment. Simultaneously, it is connected to the gas supply pipe 1 through the main active exhaust pipe. The sixth shut-off valve 21 is installed on the active exhaust pipe to control the opening and closing of the active exhaust passage. It opens during normal pressure relief or purging and closes when the exhaust pipe is under maintenance or when exhaust is not required, preventing backflow of outside air.

[0049] The control unit uses a PLC controller, connected via signal lines to the first to third pressure detection devices, gas composition detection devices, electrically controlled valves, and the purging module. It collects pressure and composition data from each detection point in real time and displays it dynamically on the screen. When the pressure exceeds the limit, it triggers the pressure relief valve and closes the relevant shut-off valves. When the oxygen volume content is ≤0.5% and the hydrogen volume content is ≥99.995%, it controls the electrically controlled valve to open. If the levels are unqualified (hydrogen volume content ≤96% or oxygen volume content ≥4%), it closes the electrically controlled valve and starts the purging module, which releases nitrogen into the gas pipeline. When the oxygen volume content is ≤0.5%, it disconnects the purging module from the gas pipeline. It also has an alarm function, alerting maintenance personnel with audible and visual alarms in case of abnormalities.

[0050] This application, through a graded pressure reduction design, combined with full-process pressure monitoring by the first to third pressure detection devices, can accurately reduce the high-pressure gas source to the pressure required by downstream gas-consuming equipment, quickly compensate for gas consumption fluctuations, and avoid sudden pressure rises and falls; at the same time, the dual pressure relief valves form graded overpressure protection, completely solving the problems of unstable pressure and equipment impact in existing systems, and adapting to the low-pressure stable gas supply needs of different equipment such as fuel cells and precision instruments.

[0051] The system features a comprehensive closed-loop safety protection system. The flexible metal bellows connection reduces the risk of leakage caused by vibration of the gas storage structure. A high-precision filter with a mesh size of 800 or higher intercepts impurities and protects downstream components. The gas composition detection device is linked with the electric control valve to prevent unqualified gases from entering the gas consumption end. The purging interface, in conjunction with the nitrogen purging module, can replace unqualified gases in the pipeline, preventing hydrogen from mixing with air and causing deflagration.

[0052] The control unit enables real-time monitoring and automatic response of all parameters. When the pressure exceeds the limit, it automatically triggers the pressure relief valve and closes the shut-off valve. When the gas is qualified, it automatically opens the electric control valve. In case of abnormality, it provides audible and visual alarms. No manual inspection and judgment are required, reducing the crisis response time to the second level. This solves the problems of existing systems relying on manual labor and slow response, while reducing human error and improving the reliability of system operation.

[0053] The gas storage structure has reserved interfaces for expansion to new gas sources (such as adding electrolytic hydrogen production equipment), and standardized gas interfaces are compatible with different gas-using equipment; the first to sixth shut-off valves enable segmented control of the pipeline, and when a certain component is under maintenance, only the corresponding shut-off valve needs to be closed, without the need for overall gas supply interruption, ensuring continuous gas supply; all components are integrated into the skid-mounted base, eliminating the need for on-site welding, making installation convenient, and taking into account both system scalability and operation and maintenance efficiency.

[0054] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A skid-mounted module for a self-controlled, voltage-stabilized hydrogen supply system, characterized in that, It includes a gas storage structure, a first gas pressure detection device, a first shut-off valve, a gas filter, a first pressure reducing valve, a second gas pressure detection device, a first pressure relief valve, a second shut-off valve, a second pressure reducing valve, a third gas pressure detection device, a third shut-off valve, a second pressure relief valve, an electric control valve, a fourth shut-off valve, a gas composition detection device, a fifth shut-off valve, and a gas interface, arranged sequentially along the gas pipeline. The gas storage structure is used for storing hydrogen; the first, second, third, fourth, and fifth shut-off valves are used to control the on / off state of corresponding positions in the gas transmission pipeline; the gas filter is used to remove impurities from the gas in the gas transmission pipeline; the first and second pressure reducing valves are used for two pressure reductions of the hydrogen; the first, second, and third pressure detection devices are used for detecting the gas pressure at corresponding positions in the gas transmission pipeline; the first and second pressure relief valves are used to release hydrogen when the pressure exceeds a pressure threshold; the gas composition detection device is used to detect the composition of the hydrogen. The gas interface is used to connect the gas pipeline to the gas-using equipment; It also includes a control unit, which monitors in real time the pressure data of the first pressure detection device, the second pressure detection device and the third pressure detection device, as well as the gas composition data of the gas composition detection device, and controls the on / off of the gas pipeline by the electronically controlled valve.

2. The skid-mounted module of the self-controlled voltage-stabilized hydrogen supply system according to claim 1, characterized in that, The gas pipeline is also equipped with a purging interface for connecting to a purging module. The purging module is used to input purging gas into the gas pipeline to purge and replace hydrogen.

3. The skid-mounted module of the self-controlled voltage-stabilized hydrogen supply system according to claim 2, characterized in that, The gas composition detection device includes a hydrogen detector and an oxygen detector, used to detect the purity of hydrogen and the content of oxygen.

4. The skid-mounted module of the self-controlled voltage-stabilized hydrogen supply system according to claim 3, characterized in that, The purging module is activated under the control of the control unit. When the hydrogen volume content in the gas pipeline is ≤96% or the oxygen volume content is ≥4%, the purging module releases purging gas into the gas pipeline. When the oxygen volume content is ≤0.5%, the control unit disconnects the purging module from the gas pipeline.

5. The skid-mounted module of the self-controlled voltage-stabilized hydrogen supply system according to claim 3, characterized in that, The control unit monitors the data fed back by the gas composition detection device, and releases hydrogen to the gas-using equipment through the gas-using interface when the oxygen volume content is ≤0.5% and the hydrogen volume content is ≥99.995%.

6. The skid-mounted module of the self-controlled voltage-stabilized hydrogen supply system according to claim 1, characterized in that, The gas filter has a filtration accuracy greater than 800 mesh.

7. The skid-mounted module of the self-controlled voltage-stabilized hydrogen supply system according to claim 1, characterized in that, The hydrogen gas has a pressure of 1.5 to 1.6 MPa after passing through the first pressure reducing valve and a pressure of 0.5 to 0.8 MPa after passing through the second pressure reducing valve.

8. The skid-mounted module of the self-controlled voltage-stabilized hydrogen supply system according to claim 1, characterized in that, The gas storage structure is provided with a reserved interface to increase the supply source of hydrogen.

9. The skid-mounted module of the self-controlled voltage-stabilized hydrogen supply system according to claim 1 or 8, characterized in that, The hydrogen gas is hydrogen gas, and the gas storage structure includes a hydrogen gas container cylinder and an electrolytic hydrogen production device. The gas storage structure and the gas transmission pipeline are connected by a metal corrugated pipe.

10. The skid-mounted module of the self-controlled voltage-stabilized hydrogen supply system according to claim 1, characterized in that, The gas released by the first pressure relief valve and the second pressure relief valve is discharged through the exhaust port. An active exhaust pipe is provided between the exhaust port and the gas transmission pipeline, and a sixth shut-off valve is provided on the active exhaust pipe.

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