Integrated equipment for testing hydrogen permeation and pressure regulating performance of full-size pressure regulator

Abstract

The invention discloses a full-size pressure regulator hydrogen permeation and pressure regulating performance testing integrated device which comprises hydrogen / hydrogen-doped natural gas, a gas source, a valve set, a tee joint, a pressure gauge set, a pipeline, a sealing clamp, a pressure regulator, a gas chromatograph and a vacuum pump. The gas source is connected with the clamp through a pipeline, a sealing area is formed through the sealing clamp and the pipe sleeve, the permeability coefficients of pure hydrogen and hydrogen-doped natural gas in the pressure regulator can be tested by combining a gas chromatograph, a vacuum pump and the like, and meanwhile the pressure regulating performance of the pressure regulator in the hydrogen environment is researched. The hydrogen permeability coefficient of the hydrogen-doped natural gas in the pressure regulator can be measured through gas chromatography; the device can work for a long time, the pressure regulating performance of the pressure regulator in the hydrogen environment can be researched, and the hydrogen permeability of the full-size pressure regulator can be tested while the pressure regulating performance of the pressure regulator can be tested in the hydrogen environment.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydrogen energy application, and in particular relates to an integrated device for testing hydrogen permeation and voltage regulation performance of a full-size voltage regulator. Background Art

[0002] Using clean energy to replace traditional fossil energy can reduce carbon emissions. Hydrogen is a clean energy source that emits zero carbon emissions after combustion. Vigorously promoting the use of hydrogen energy will help reduce carbon emissions.

[0003] After searching, it was found that in the prior art, Chinese patent application number: CN103674808B discloses a test device for the gas permeability of full-size non-metallic pipes, comprising a pipe body sealing system (2) for sealing a test pipe sample (1), a metal test cavity (3) for placing the test pipe sample (1), the test pipe sample (1) being connected to a gas supply system (5), a cavity space (4) formed between the metal test cavity (3) and the test pipe sample (1) being connected to a pressure acquisition system (8), and the cavity space (4) and the test pipe sample (1) being respectively connected to a vacuum pump (6). The present invention also provides a method for testing the gas permeability of full-size non-metallic pipes using the test device. The test device for the gas permeability of full-size non-metallic pipes and the test method thereof provided by the present invention have the advantages of high test pressure, large test pipe thickness, and short test time.

[0004] The above patented technology can only test the permeability of pure gas in non-metallic pipes, but cannot test the permeability of single-component gas in mixed gases at pipe joints and pressure regulators, and cannot test the pressure regulating performance of pressure regulators in hydrogen environments. Therefore, we need to provide a full-scale pressure regulator channel hydrogen permeation and pressure regulation performance testing integrated equipment. Summary of the Invention

[0005] The purpose of the present invention is to provide an integrated device for testing hydrogen permeation and pressure regulating performance of a full-size pressure regulator. A sealing area is formed by a sealing fixture and a pipe sleeve. Combined with a gas chromatograph, a vacuum pump, etc., the permeability coefficients of pure hydrogen and hydrogen-blended natural gas in the pressure regulator can be tested, and the pressure regulating performance of the pressure regulator in a hydrogen environment can be studied at the same time. The hydrogen permeability coefficient of hydrogen-blended natural gas in the pressure regulator can be measured by gas chromatography; it can work for a long time to study the pressure regulating performance of the pressure regulator in a hydrogen environment, and can test the hydrogen permeability of the full-size pressure regulator while testing the pressure regulating performance of the pressure regulator in a hydrogen environment, so as to solve the problem raised in the above background technology that the existing technology can only test the permeability of pure gas in non-metallic pipelines, cannot test the permeability of single-component gas of the mixed gas at the pipeline connection and the pressure regulator, and cannot test the pressure regulating performance of the pressure regulator in a hydrogen environment.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a full-scale voltage regulator hydrogen permeation and voltage regulation performance testing integrated equipment, comprising:

[0007] Hydrogen / hydrogen-blended natural gas, gas source, valve group, tee, pressure gauge group, pipeline, sealing fixture, pressure regulator, gas chromatograph and vacuum pump. The sealing fixture is used to seal the two ends of the pressure regulator to the gas pipeline. The gas source is connected to the fixture through a pipeline to achieve ventilation into the gas pipeline and sealing after inflation. A pipe sleeve is set on the periphery of the pipeline. The contact part between the pipe sleeve and the pipeline is sealed by a sealing ring, so that a sealing area is formed between the pipe sleeve and the pressure regulator pipe. The pressure gauge group is set on both sides of the pressure regulator to compare the pressure regulation accuracy of the pressure regulator.

[0008] Preferably, the valve group includes valve one, valve two, valve three and valve four; valve one is used to control the connection and disconnection of hydrogen / hydrogen-blended natural gas and the pipeline, valve two is used to control the connection and disconnection of nitrogen and the pipeline, valve three is used to balance the pressure in the pipeline during inflation, and valve four is used to exhaust the mixed gas in the pipeline.

[0009] Preferably, the sealing fixture includes a clamping component for fixing both ends of the voltage regulator, and a sealing member provided on the contact surface between the clamping component and the pipeline, and the sealing member is provided as a sealing ring or a sealing gasket.

[0010] Preferably, the pressure gauge group includes two pressure gauges, which are respectively arranged at the inlet end and the outlet end of the pressure regulator.

[0011] Preferably, the gas chromatograph is connected to the sealed area via a pipeline, and is used to collect gas samples in the sealed area and analyze the hydrogen concentration.

[0012] Preferably, the vacuum pump is connected to the sealing area through a pipeline, and is used to evacuate the sealing area to a vacuum.

[0013] Preferably, a pressure reading instrument is further included, and the pressure reading instrument is connected to the pressure sensor in the sealing area to achieve real-time recording of the pressure in the sealing area.

[0014] Preferably, the pipeline is configured as a PE pipe.

[0015] A testing method using an integrated device for testing hydrogen permeation and pressure regulation performance of a full-size pressure regulator comprises the following steps:

[0016] First, close valve 1 and open valve 3, then close valve 4 and open valve 2, and fill the pipeline with 0.2MPa nitrogen;

[0017] After the nitrogen filling is completed, close valve 2 and open valve 4 to exhaust the mixed gas. Repeat this process at least 5 times to exhaust the air in the pipeline.

[0018] After the air in the pipeline is evacuated, close valve 4 and open valve 1 to fill the pipeline with 0.4MPa hydrogen / hydrogen-blended natural gas. After filling, close valve 1 and open valve 4 to evacuate the mixed gas. Repeat this process at least 5 times to evacuate the nitrogen in the pipeline.

[0019] Start the vacuum pump to evacuate the sealed area to an absolute pressure of ≤20kPa, open valves 1 and 3, fill the pipeline with hydrogen / hydrogen-blended natural gas at the pressure required for the experiment, and close valve 2 to observe whether the pressure meets the test requirements;

[0020] When the pressure reaches the test requirements, record the pressure gauge data at the rear end of the pressure regulator, and start the pressure reading instrument to record the pressure changes in the sealing area, so as to conduct penetration and pressure regulation performance tests;

[0021] After the test is completed, the hydrogen permeability coefficient is calculated based on the pressure, time curve and gas chromatography analysis results, and finally the working performance of the pressure regulator is analyzed based on the changes in the pressure gauge data.

[0022] Preferably, the permeability coefficient is calculated based on a curve of pressure variation over time in the sealed area and the hydrogen concentration measured by gas chromatography, and is calculated using a permeability formula in combination with experimental temperature and pressure parameters.

[0023] Technical effects and advantages of the present invention: The integrated equipment for testing hydrogen permeation and pressure regulation performance of a full-scale pressure regulator proposed in the present invention has the following advantages over the prior art:

[0024] The present invention forms a sealing area through a sealing fixture and a pipe sleeve, and is combined with a gas chromatograph, a vacuum pump, etc., to test the permeability coefficients of pure hydrogen and hydrogen-blended natural gas in a pressure regulator, and simultaneously study the pressure regulating performance of the pressure regulator in a hydrogen environment. The hydrogen permeability coefficient of hydrogen-blended natural gas in the pressure regulator can be measured by gas chromatography; the invention can work for a long time to study the pressure regulating performance of the pressure regulator in a hydrogen environment, and can test the pressure regulating performance of the pressure regulator in a hydrogen environment while testing the hydrogen permeability performance of a full-size pressure regulator.

[0025] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a simplified structural diagram of the integrated equipment for testing hydrogen permeation and pressure regulation performance of a full-scale pressure regulator according to the present invention;

[0027] Figure 2 is a cross-sectional view of a gas pressure regulator of the present invention;

[0028] Figure 3 It is a flow chart of the steps of the present invention. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. The specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] like Figure 1-3 As shown, the present invention provides an integrated device for testing hydrogen permeation and pressure regulation performance of a full-size pressure regulator, including hydrogen / hydrogen-blended natural gas, a gas source, a valve group, a tee, a pressure gauge group, a pipeline, a sealing fixture, a pressure regulator, a gas chromatograph and a vacuum pump. The sealing fixture is used to seal the two ends of the pressure regulator with the gas pipeline. The gas source is connected to the fixture through a pipeline to achieve ventilation into the gas pipeline and sealing after inflation; a pipe sleeve is provided on the periphery of the pipeline, and the contact portion between the pipe sleeve and the pipeline is sealed by a sealing ring, so that a sealing area is formed between the pipe sleeve and the pressure regulator pipe; the pressure gauge group is provided on both sides of the pressure regulator to compare the pressure regulation accuracy of the pressure regulator.

[0031] Specifically, this integrated device integrates multiple components to form a test system: a hydrogen / hydrogen-blended natural gas source provides the test medium, simulating the actual operating conditions of pure hydrogen or hydrogen-blended natural gas; a nitrogen source is used to purge and evacuate the pipeline; a valve group contains multiple valves that control the gas flow direction through a combination of switches; a three-way pipe fitting enables pipeline diversion and merging, establishing a gas circulation path. The pressure gauge group monitors pressure changes in real time, providing data support for pressure regulation performance evaluation. The pipeline is made of PE material, suitable for gas transmission scenarios. The sealing fixture cooperates with the seal through mechanical clamping to ensure high airtightness at the connection between the pressure regulator and the pipeline. A pipe sleeve is installed around the pressure regulator to form a sealed area between it and the pipeline. After evacuation with a vacuum pump, this area can be used to monitor hydrogen permeation. A gas chromatograph is connected to the sealed area pipeline to analyze the hydrogen concentration in the permeating gas, providing key data for permeation coefficient calculation.

[0032] The valve group includes valve 1, valve 2, valve 3 and valve 4; valve 1 is used to control the connection and disconnection of hydrogen / hydrogen-blended natural gas to the pipeline, valve 2 is used to control the connection and disconnection of nitrogen to the pipeline, valve 3 is used to balance the pressure in the pipeline during inflation, and valve 4 is used to exhaust the mixed gas in the pipeline;

[0033] Specifically, the valve group features a four-valve design with separate functions: Valve 1 is the main control valve for hydrogen / hydrogen-blended natural gas, featuring a ball valve structure with fast on / off response, enabling precise control of the gas source on and off. Valve 2 controls nitrogen input and utilizes a globe valve for easy nitrogen flow adjustment. Valve 3 is a pressure balancing valve, installed at the end of the pipeline. Opening during inflation releases trapped air in the pipeline, preventing air blockage from affecting pressure stability. Valve 4 is the drain valve, connected to the pipeline drain branch. Its diameter is slightly larger than the other valves, ensuring rapid discharge of the mixed gas. These four valves are linked via a PLC control system for automated process control.

[0034] The sealing fixture includes a clamping component for fixing both ends of the voltage regulator, and a sealing member arranged on the contact surface between the clamping component and the pipeline. The sealing member is configured as a sealing ring or a sealing gasket.

[0035] Specifically, the sealing fixture adopts a split metal frame structure, which includes an upper clamping plate and a lower clamping plate. The two ends of the voltage regulator are mechanically fixed by bolts. An annular groove is opened on the inside of the clamping component for embedding the seal. The seal is made of fluororubber sealing ring or polytetrafluoroethylene sealing gasket. The former is suitable for room temperature environment, and the latter can withstand the temperature range of -200℃ to 260℃. The cross-section of the seal is designed as a lip-shaped structure, which can automatically expand and fit the contact surface under the action of gas pressure to form a dynamic seal. The surface of the fixture is nickel-plated to enhance corrosion resistance.

[0036] The pressure gauge group includes two pressure gauges, which are respectively arranged at the inlet end and the outlet end of the pressure regulator.

[0037] Specifically, the pressure gauge group uses two high-precision digital pressure gauges: the inlet pressure gauge has a range of 0-1MPa and an accuracy level of 0.25, which is used to monitor the gas source input pressure; the outlet pressure gauge has a range of 0-0.6MPa and an accuracy level of 0.16, which is more suitable for precise measurement after the pressure regulator reduces the pressure. Both pressure gauges are equipped with RS485 communication interfaces, which can transmit pressure data to the industrial computer in real time to form a pressure-time curve. The meter body uses a full stainless steel shell with a protection level of IP65, which can resist gas leakage corrosion.

[0038] The gas chromatograph is connected to the sealed area through a pipeline and is used to collect gas samples in the sealed area and analyze the hydrogen concentration.

[0039] The gas chromatograph is connected to the sealed area through a hydrogen-resistant stainless steel pipeline with an inner diameter of 3mm and a length of no more than 2m to reduce gas transmission delay. The sampling port is set at the top of the sealed area to prevent condensation from affecting the sampling accuracy. The instrument is equipped with a thermal conductivity detector with a detection limit of hydrogen of 1ppm, which can accurately measure low-concentration permeating gas. The analysis software has built-in hydrogen and methane separation algorithms, which can quickly separate hydrogen components in hydrogen-blended natural gas testing and calculate their concentration values.

[0040] The vacuum pump is connected to the sealing area through a pipeline and is used to evacuate the sealing area to a vacuum.

[0041] Specifically, the vacuum pump uses a rotary vane vacuum pump with a pumping rate of 15L / min and an ultimate vacuum degree of up to 10Pa. It can reduce the absolute pressure in the sealing area to below 20kPa. An electromagnetic vacuum valve is set between the pump body and the sealing area. It automatically closes when shut down to prevent pump oil backflow. A vacuum pressure gauge is installed in the pipeline to display the vacuum degree of the sealing area in real time. The vacuum pump is equipped with a cooling fan and can work continuously for 8 hours without heating, making it suitable for long-term testing scenarios.

[0042] The present invention further comprises a pressure reading instrument, which is connected to the pressure sensor in the sealing area to achieve real-time recording of the pressure in the sealing area.

[0043] Specifically, the pressure reading instrument uses a high-precision data acquisition device with a 10Hz sampling frequency, capable of capturing subtle pressure changes. The device is connected to a piezoresistive pressure sensor within the sealed area, boasting an accuracy of 0.1% FS and a response time of <10ms. The data acquisition device has a built-in storage module that can store 72 hours of continuous pressure data and supports USB export. The accompanying software automatically generates pressure-time curves and calculates the slope of the curve, providing the foundational data for permeability coefficient calculations.

[0044] The pipeline is set as PE pipe. The pipeline uses SDR11 series PE100 grade polyethylene pipe with a nominal outer diameter of 110mm, a wall thickness of 10mm, and a pressure rating of 0.8MPa, which meets gas transmission standards. The inner wall of the pipe is smoothed with a surface roughness of Ra <0.8μm to reduce gas flow resistance. The pipe joints are welded with electric fusion welding, which has a higher weld strength than the pipe itself to ensure no leakage. The PE material has good hydrogen embrittlement resistance, which prevents material degradation in long-term hydrogen environments.

[0045] The present invention also provides a testing method using an integrated device for testing hydrogen permeation and pressure regulation performance of a full-size pressure regulator, comprising the following steps:

[0046] First, close valve 1 and open valve 3, then close valve 4 and open valve 2, and fill the pipeline with 0.2MPa nitrogen;

[0047] After the nitrogen filling is completed, close valve 2 and open valve 4 to exhaust the mixed gas. Repeat this process at least 5 times to exhaust the air in the pipeline.

[0048] After the air in the pipeline is evacuated, close valve 4 and open valve 1 to fill the pipeline with 0.4MPa hydrogen / hydrogen-blended natural gas. After filling, close valve 1 and open valve 4 to evacuate the mixed gas. Repeat this process at least 5 times to evacuate the nitrogen in the pipeline.

[0049] Start the vacuum pump to evacuate the sealed area to an absolute pressure of ≤20kPa, open valves 1 and 3, fill the pipeline with hydrogen / hydrogen-blended natural gas at the pressure required for the experiment, and close valve 2 to observe whether the pressure meets the test requirements;

[0050] When the pressure reaches the test requirements, record the pressure gauge data at the rear end of the pressure regulator, and start the pressure reading instrument to record the pressure changes in the sealing area, so as to conduct penetration and pressure regulation performance tests;

[0051] After the test is completed, the hydrogen permeability coefficient is calculated based on the pressure, time curve and gas chromatography analysis results, and finally the working performance of the pressure regulator is analyzed based on the changes in the pressure gauge data;

[0052] Specifically, during the pretreatment phase, the air in the pipeline is purged with nitrogen five times to ensure the purity of the test medium. Nitrogen is then replaced with hydrogen or hydrogen-blended natural gas five times to eliminate background gas interference. During the vacuum treatment phase, the sealed area is evacuated to an absolute pressure of ≤20kPa, creating a negative pressure environment to enhance the driving force for hydrogen permeation. During the test phase, changes in the regulator inlet and outlet pressures and the sealed area pressure are simultaneously recorded, with a data sampling interval of 1 second. The permeation test duration can be set as needed, from a minimum of 30 minutes to a maximum of 72 hours, covering both short-term and long-term performance evaluations.

[0053] The permeability coefficient is calculated based on the pressure change curve over time in the sealing area and the hydrogen concentration measured by gas chromatography, combined with the experimental temperature and pressure parameters;

[0054] Specifically, the permeation formula is P = V·Δp÷A·t, where P is the hydrogen permeability coefficient (unit: Pa·m 2 / s, the unit can be adjusted according to actual needs); V: volume of the sealing area (m 3 ); Δp: pressure change value in the sealing area (Pa), obtained from the pressure-time curve recorded by the pressure reading instrument; A: permeation area of ​​the pressure regulator (m 2 ); t: test time (s). Based on the principle of differential pressure method, it is assumed that the pressure change during the permeation process is linearly related to time. Complex factors such as temperature and gas composition are ignored. The permeability coefficient is simplified by the ratio of the pressure change rate to the volume and area of ​​the sealed area. Gas chromatography data can be used to verify the hydrogen concentration in the sealed area to ensure that the permeating gas is the target component.

[0055] The permeability coefficient is calculated based on Fick's first law and derived in combination with the ideal gas state equation: the slope of the pressure and time curve (dp / dt) of the sealing area is obtained by a pressure reading instrument, the gas composition is corrected using the hydrogen concentration measured by gas chromatography, and the experimental temperature T and the pressure difference Δp on both sides of the pressure regulator are combined to calculate the permeability coefficient P using the formula P = (V·L) / (A·R·T·Δp)·dp / dt, where V is the volume of the sealing area, L is the thickness of the pressure regulator material, A is the permeability area, and R is the gas constant. The calculation software has a built-in temperature compensation algorithm to automatically correct the impact of ambient temperature fluctuations on the results.

[0056] The working principle of the present invention is as follows: first, close valve one, open valve three, close valve four, and open valve two, and fill the pipeline with 0.2MPa nitrogen; after the nitrogen is filled, close valve two and open valve four to evacuate the mixed gas, repeat at least five times, and evacuate the air in the pipeline; after the air in the pipeline is evacuated, close valve four and open valve one, and fill the pipeline with 0.4MPa hydrogen / hydrogen-blended natural gas; after the filling is completed, close valve one and open valve four to evacuate the mixed gas, repeat at least five times, and evacuate the nitrogen in the pipeline. Start the vacuum pump to evacuate the sealing area to an absolute pressure of ≤20kPa, open valves one and three, fill the pipeline with hydrogen / hydrogen-blended natural gas of the pressure required for the experiment, and close valve two to observe whether the pressure meets the test requirements; when the pressure reaches the test requirements, record the pressure gauge data at the back end of the pressure regulator, and start the pressure reading instrument to record the pressure changes in the sealing area, so as to conduct permeation and pressure regulation performance tests; after the test is completed, calculate the hydrogen permeability coefficient based on the pressure, time curve and gas chromatography analysis results, and finally analyze the working performance of the pressure regulator based on the changes in the pressure gauge data.

[0057] In addition, the present invention also provides a terminal device. The testing method involving the full-size voltage regulator hydrogen permeation and voltage regulation performance testing integrated device involved in this embodiment is mainly used in the terminal device, which can be a PC, portable computer, mobile terminal, etc. with display and processing functions.

[0058] Specifically, a terminal device may include a processor (e.g., a CPU), a communication bus, a user interface, a network interface, and a memory. The communication bus is used to enable communication between these components; the user interface may include a display and an input unit such as a keyboard; the network interface may optionally include a standard wired interface or a wireless interface (e.g., a Wi-Fi interface); and the memory may be high-speed RAM or non-volatile memory, such as a disk drive. The memory may also be a storage device independent of the processor.

[0059] Among them, the memory stores a readable storage medium, and the readable storage medium stores a test method program for the integrated test equipment. The processor can call the test method program for the integrated test equipment stored in the memory, and execute the test method of the integrated test equipment for hydrogen permeation and pressure regulation performance testing using a full-size voltage regulator provided in an embodiment of the present invention.

[0060] It will be understood that a computer-readable storage medium can be a tangible device that can hold and store instructions used by an instruction execution device. Computer-readable storage media can be, for example, but not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a static random access memory (SRAM), a portable compact disc read-only memory (CD-ROM), a digital versatile disk (DVD), a memory stick, a floppy disk, a mechanical encoding device, such as a punch card or a raised structure in a groove on which instructions are stored, and any suitable combination thereof. As used herein, a computer-readable storage medium is not to be construed as a transient signal per se, such as a radio wave or other freely propagating electromagnetic wave, an electromagnetic wave propagating through a waveguide or other transmission medium (e.g., a light pulse through a fiber optic cable), or an electrical signal transmitted through an electrical wire.

[0061] The computer-readable program instructions described herein can be downloaded from a computer-readable storage medium to each computing / processing device, or downloaded to an external computer or external storage device via a network, such as the Internet, a local area network, a wide area network, and / or a wireless network. The network can include copper transmission cables, fiber optic transmission, wireless transmission, routers, firewalls, switches, gateway computers, and / or edge servers. The network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards the computer-readable program instructions to be stored in the computer-readable storage medium in each computing / processing device.

[0062] The computer program instructions for performing the operations of the present disclosure may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Smalltalk, C++, and conventional procedural programming languages ​​such as "C" language or similar programming languages. Computer-readable program instructions may be executed entirely on a user's computer, partially on a user's computer, as an independent software package, partially on a user's computer, partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., utilizing an Internet service provider to connect via the Internet). In some embodiments, an electronic circuit, such as a programmable logic circuit, a field programmable gate array (FPGA), or a programmable logic array (PLA), may be personalized by utilizing the state information of the computer-readable program instructions. The electronic circuit may execute the computer-readable program instructions, thereby realizing various aspects of the present disclosure.

[0063] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A full-scale voltage regulator hydrogen permeation and voltage regulation performance test integrated equipment, characterized in that: include: Hydrogen / hydrogen-blended natural gas, gas source, valve group, tee, pressure gauge group, pipeline, sealing fixture, pressure regulator, gas chromatograph and vacuum pump. The sealing fixture is used to seal the two ends of the pressure regulator to the gas pipeline. The gas source is connected to the fixture through a pipeline to achieve ventilation into the gas pipeline and sealing after inflation. A pipe sleeve is set on the periphery of the pipeline. The contact part between the pipe sleeve and the pipeline is sealed by a sealing ring, so that a sealing area is formed between the pipe sleeve and the pressure regulator pipe. The pressure gauge group is set on both sides of the pressure regulator to compare the pressure regulation accuracy of the pressure regulator.

2. The integrated device for testing hydrogen permeation and voltage regulation performance of a full-scale voltage regulator according to claim 1, characterized in that: The valve group includes valve one, valve two, valve three and valve four; valve one is used to control the connection and disconnection of hydrogen / hydrogen-blended natural gas and the pipeline, valve two is used to control the connection and disconnection of nitrogen and the pipeline, valve three is used to balance the pressure in the pipeline during inflation, and valve four is used to empty the mixed gas in the pipeline.

3. The integrated device for testing hydrogen permeation and voltage regulation performance of a full-scale voltage regulator according to claim 1, characterized in that: The sealing fixture includes a clamping component for fixing both ends of the voltage regulator, and a sealing member arranged on the contact surface between the clamping component and the pipeline. The sealing member is configured as a sealing ring or a sealing gasket.

4. The integrated device for testing hydrogen permeation and voltage regulation performance of a full-scale voltage regulator according to claim 1, characterized in that: The pressure gauge group includes two pressure gauges, which are respectively arranged at the inlet end and the outlet end of the pressure regulator.

5. The integrated device for testing hydrogen permeation and voltage regulation performance of a full-scale voltage regulator according to claim 1, characterized in that: The gas chromatograph is connected to the sealed area through a pipeline and is used to collect gas samples in the sealed area and analyze the hydrogen concentration.

6. The integrated device for testing hydrogen permeation and voltage regulation performance of a full-scale voltage regulator according to claim 1, characterized in that: The vacuum pump is connected to the sealing area through a pipeline and is used to evacuate the sealing area to a vacuum.

7. The integrated device for testing hydrogen permeation and voltage regulation performance of a full-scale voltage regulator according to claim 1, characterized in that: It also includes a pressure reading instrument, which is connected to the pressure sensor in the sealing area to achieve real-time recording of the pressure in the sealing area.

8. The integrated device for testing hydrogen permeation and voltage regulation performance of a full-scale voltage regulator according to claim 1, characterized in that: The pipeline is configured as a PE pipe.

9. A testing method using the integrated device for testing hydrogen permeation and voltage regulation performance of a full-scale voltage regulator according to any one of claims 1 to 8, characterized in that: The following steps are involved: First, close valve 1 and open valve 3, then close valve 4 and open valve 2, and fill the pipeline with 0.2MPa nitrogen; After the nitrogen filling is completed, close valve 2 and open valve 4 to exhaust the mixed gas. Repeat this process at least 5 times to exhaust the air in the pipeline. After the air in the pipeline is evacuated, close valve 4 and open valve 1 to fill the pipeline with 0.4MPa hydrogen / hydrogen-blended natural gas. After filling, close valve 1 and open valve 4 to evacuate the mixed gas. Repeat this process at least 5 times to evacuate the nitrogen in the pipeline. Start the vacuum pump to evacuate the sealed area to an absolute pressure of ≤20kPa, open valves 1 and 3, fill the pipeline with hydrogen / hydrogen-blended natural gas at the pressure required for the experiment, and close valve 2 to observe whether the pressure meets the test requirements; When the pressure reaches the test requirements, record the pressure gauge data at the rear end of the pressure regulator, and start the pressure reading instrument to record the pressure changes in the sealing area, so as to conduct penetration and pressure regulation performance tests; After the test is completed, the hydrogen permeability coefficient is calculated based on the pressure, time curve and gas chromatography analysis results, and finally the working performance of the pressure regulator is analyzed based on the changes in the pressure gauge data.

10. The method for testing the integrated equipment for testing hydrogen permeation and voltage regulation performance of a full-scale voltage regulator according to claim 9, characterized in that: The permeability coefficient is calculated based on a curve of pressure variation over time in the sealing area and the hydrogen concentration measured by gas chromatography, and is calculated using a permeability formula in combination with experimental temperature and pressure parameters.

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