High-pressure gas supply principle verification system and method

Abstract

The invention discloses a high-pressure gas supply principle verification system and method, and relates to the technical field of high-pressure gas supply, and the system comprises a high-pressure hydrogen / oxygen supply mechanism which is used for carrying out the pressurization and gasification of liquid oxygen or a liquid hydrogen material, and obtaining and storing a high-pressure gas material; the data acquisition mechanism is assembled on the high-pressure hydrogen / oxygen supply mechanism and is used for acquiring the pressure before and after pressurization of the material, the temperature before and after gasification of the material and the pressure and temperature of the stored gas material in the supply process of the high-pressure hydrogen / oxygen supply mechanism; a valve mechanism; and the control mechanism is respectively in communication connection with the high-pressure hydrogen / oxygen supply mechanism, the data acquisition mechanism and the valve mechanism, controls the operation of the high-pressure hydrogen / oxygen supply mechanism and the valve mechanism, and verifies the supply principle of the high-pressure hydrogen / oxygen supply mechanism by using the data acquired by the data acquisition mechanism.

Description

Technical Field

[0001] The present invention relates to the technical field of high-pressure gas supply, and more particularly to a system and method for verifying the principle of high-pressure gas supply. Background Art

[0002] The high-pressure hydrogen / oxygen supply system refers to a system that supplies high-pressure hydrogen or oxygen, thereby providing stable high-pressure hydrogen or oxygen for subsequent systems to use.

[0003] For example, a project needs to be completed at 1.7 m 3 The high-pressure container is quickly filled with 45 MPa hydrogen or oxygen within 40 minutes, so that it can be used by subsequent systems.

[0004] On this basis, it is necessary to design a high-pressure hydrogen / oxygen supply system and verify the high-pressure hydrogen or oxygen supply principle of the high-pressure hydrogen / oxygen supply system, verify the system composition, operation principle, working process, key technologies and main indicators, and lay a technical foundation for the subsequent construction and experimental verification of the high-pressure hydrogen / oxygen supply system.

[0005] Therefore, there is an urgent need for a high-pressure gas supply principle verification system and method. Summary of the Invention

[0006] In order to overcome the above-mentioned defects in the prior art, the present invention discloses a high-pressure gas supply principle verification system and method to construct a high-pressure hydrogen / oxygen supply system and verify the high-pressure hydrogen / oxygen supply system.

[0007] In order to achieve the above objectives, the present invention adopts the following technical solutions: In a first aspect, the present invention provides a high-pressure gas supply principle verification system, comprising: A high-pressure hydrogen / oxygen supply mechanism, which is used to pressurize and gasify liquid oxygen or liquid hydrogen materials to obtain high-pressure gas materials and store them; A data acquisition mechanism, the data acquisition mechanism being mounted on the high-pressure hydrogen / oxygen supply mechanism and being used to collect the pressure of the material before and after pressurization, the temperature of the material before and after gasification, and the pressure and temperature of the stored gas material during the supply process of the high-pressure hydrogen / oxygen supply mechanism; A valve mechanism, which is mounted on a pipeline of a high-pressure hydrogen / oxygen supply mechanism to control the on / off state of the pipeline; The control mechanism is respectively connected to the high-pressure hydrogen / oxygen supply mechanism, the data acquisition mechanism, and the valve mechanism to control the operation of the high-pressure hydrogen / oxygen supply mechanism and the valve mechanism, and uses the data collected by the data acquisition mechanism to verify the supply principle of the high-pressure hydrogen / oxygen supply mechanism.

[0008] Preferably, the high-pressure hydrogen / oxygen supply mechanism includes a liquid material storage bottle, a gas-liquid separator, a cryogenic pump, an air-temperature vaporizer, a water bath heater, and a gaseous material storage tank, which are sequentially connected through a delivery pipeline; the liquid material storage bottle stores liquid low-temperature liquid oxygen or liquid hydrogen material, the liquid material is transported to the cryogenic pump through the gas-liquid separator for pressurization, and the pressurized liquid material is sequentially transported to the air-temperature vaporizer and the water bath heater for vaporization and heating, and the gaseous material after vaporization and heating is stored in the gaseous material storage tank; The high-pressure hydrogen / oxygen supply mechanism also includes a vent pipe and a flame arrester. The flame arrester is installed at the tail end of the vent pipe. The front end of the vent pipe is connected to the front end delivery pipeline of the gas-liquid separator, the gas end separation outlet of the gas-liquid separator, the return air port of the cryogenic pump, the rear end delivery pipeline of the water bath heater, and the gaseous material storage tank through a vent branch pipe.

[0009] Preferably, the data collection mechanism includes: A pump inlet pressure transmitter installed on the delivery pipeline at the front end of the gas-liquid separator; A pump outlet pressure transmitter mounted on the delivery pipeline at the rear end of the cryogenic pump; A tank pressure transmitter installed on the conveying pipeline at the front end of the gaseous material storage tank; A pump outlet temperature sensor mounted on the delivery pipeline at the rear end of the cryogenic pump; An air-temperature post-gasification temperature sensor installed on the delivery pipeline at the rear end of the air-temperature vaporizer; a water bath heater temperature sensor mounted on the water bath heater; A temperature sensor after water bath heating is installed on the delivery pipe at the rear end of the water bath heater; A tank temperature sensor installed on a gaseous material storage tank.

[0010] Preferably, the valve mechanism comprises: The liquid inlet main valve is installed on the delivery pipeline at the front end of the gas-liquid separator; The tank air inlet valve is installed on the front conveying pipeline of the gaseous material storage tank; The pre-cooling vent valve is installed on the vent branch pipe between the vent pipe and the return gas port of the cryogenic pump; A pipe vent valve installed on the vent branch pipe between the vent pipe and the rear end delivery pipe of the water bath heater; The tank vent valve is installed on the vent branch pipe between the vent pipe and the gaseous material storage tank; The main vent valve is installed at the end of the vent pipe.

[0011] Preferably, the control mechanism includes a PLC and a host computer; The PLC is respectively connected to the high-pressure hydrogen / oxygen supply mechanism, the data acquisition mechanism, and the valve mechanism, and the host computer is connected to the PLC; The PLC is SIMATIC S7-1200 and is programmed using Siemens Portal programming software. The host computer is equipped with Beijing Jiusiyi Software Company's Easy Control World small network distributed control system software. The liquid inlet main valve, tank air inlet valve, pre-cooling vent valve, pipeline vent valve, and tank vent valve are all air-controlled valves, and the air-controlled valves are Magswit 21V4M071-YMNC-MONEL type; The conveying pipeline is a monel alloy pipe with an outer diameter of 25 mm and a wall thickness of 5 mm. The conveying pipeline removes oil stains and solid particles and maintains the smoothness of the inner surface of the conveying pipeline.

[0012] In a second aspect, the present invention provides a method for verifying the principle of high-pressure gas supply, comprising the following steps: S1. Perform strength test and degreasing treatment on the principle verification system; S2. Vacuum the proof-of-principle system; S3. Use nitrogen to conduct system coordination and testing, fill nitrogen into the gaseous material storage tank and check the air tightness; S4. Conduct formal tests on the principle verification system using oxygen or hydrogen. During the formal test, the data acquisition mechanism collects the pressure of the material before and after pressurization, the temperature of the material before and after gasification, and the pressure and temperature of the stored gas material during the supply process of the high-pressure hydrogen / oxygen supply mechanism, and sends the collected data to the control mechanism. The control mechanism processes the collected data and outputs a real-time curve chart of the pressure and temperature test indicators and time.

[0013] Preferably, in step S1, the strength test is performed using clean water, the test pressure is 1.25 times the design pressure, and oil-free nitrogen is used for blowing after the strength test; In step S1, the degreasing treatment uses carbon tetrachloride as a degreasing agent and adopts a segmented convection circulation method to degrease the equipment.

[0014] Preferably, in step S2, the vacuum treatment includes the following steps: S21. Connect the vacuum system to the outlet of the gaseous material storage tank, and connect the nitrogen bottle to the inlet of the liquid inlet main valve; S22. Close the manual valves for the inlet and outlet of the nitrogen cylinder, open the main liquid inlet valve, pre-cooling vent valve, pipeline vent valve, and storage tank vent valve, and keep other valves closed; S23, start the vacuum system to perform vacuum operation, pump the vacuum to below 20 Pa, and maintain the pressure for 0.5 hours. If the vacuum degree drops abnormally during the pressure maintenance period, it indicates that there is a leak in the pipeline. After treatment, restart the operation; repeat the vacuum operation until the vacuum is below 20 Pa; S24, close the vacuum system and the vacuuming is completed.

[0015] Preferably, step S3 includes the following steps: S31. Open the manual valves at the inlet and outlet of the nitrogen cylinder, then slowly open the valve on the nitrogen cylinder, open the main liquid inlet valve, pre-cooling vent valve, pipeline vent valve, and storage tank vent valve; S32, start the cryogenic pump, and the cryogenic pump inlet pipeline enters the pre-cooling state. When the cryogenic pump inlet is in liquid state, close the pre-cooling vent valve, pipeline vent valve, and tank vent valve, and then officially enter the pressurization stage; S33. After the pressure of the tank pressure transmitter reaches 45MPa, maintain it for 30 minutes and then conduct an air tightness check; observe whether the pressure of the tank pressure transmitter changes. If it decreases, it means that there is a leak in the pipeline. After inspection and treatment, retest; S34. After the air tightness check is completed, close the main liquid inlet valve and open the tank vent valve to exhaust air until the pressure of the tank pressure transmitter reaches 0MPa and then close the tank vent valve.

[0016] Preferably, step S4 includes: S41, connecting the liquid material storage bottle filled with hydrogen or oxygen to the inlet end of the liquid inlet main valve; S42. Open the manual valve of the liquid material storage bottle, slowly open the valve on the storage bottle, and evacuate the site; S43, open the liquid inlet main valve, pre-cooling vent valve, pipeline vent valve, and storage tank vent valve, start the cryogenic pump, and the cryogenic pump inlet pipeline enters the pre-cooling state. When the cryogenic pump inlet is in liquid state, close the pre-cooling vent valve, pipeline vent valve, and storage tank vent valve, and then officially enter the pressurization stage; S44. After the pressure of the tank pressure transmitter reaches 45MPa, maintain it for 10 minutes and observe whether the pressure of the tank pressure transmitter changes. If there is no decrease, close the main liquid inlet valve and open the tank vent valve to exhaust the oxygen or hydrogen in the gaseous material storage tank. After the pressure of the tank pressure transmitter reaches 0.1MPa, close the tank vent valve and enter the next round of test procedures. S45. Repeat steps S43-S44 multiple times to complete the test.

[0017] Beneficial effects of the present invention: The high-pressure gas supply principle verification system and method provided by the present invention, on the one hand, establish a high-pressure hydrogen / oxygen supply mechanism, which pressurizes and vaporizes liquid oxygen or liquid hydrogen materials to obtain high-pressure gas materials and stores them; based on the high-pressure hydrogen / oxygen supply mechanism, a principle verification system is designed, including a control mechanism and a data acquisition mechanism that collects the operating temperature and pressure of the high-pressure hydrogen / oxygen supply mechanism. The control mechanism controls the operation of the high-pressure hydrogen / oxygen supply mechanism, and uses the data collected by the data acquisition mechanism to verify the supply principle of the high-pressure hydrogen / oxygen supply mechanism, thereby realizing the high-pressure gas supply principle verification and laying a technical foundation for the subsequent construction and experimental verification of the high-pressure hydrogen / oxygen supply system.

[0018] The high-pressure gas supply principle verification system and method provided by the present invention include: verifying whether the principle of the high-pressure hydrogen / oxygen supply mechanism pressurizing and vaporizing liquid oxygen or liquid hydrogen materials to obtain high-pressure gas materials and store them is feasible through data collected by the data acquisition mechanism, whether the liquid materials can be pressurized and vaporized to obtain high-pressure gas materials, and verifying whether spontaneous combustion occurs when venting, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of a system for verifying the principle of high-pressure gas supply according to the present invention; Figure 2 A schematic diagram of a system for verifying the principle of high-pressure gas supply displayed on the control mechanism of the present invention; Figure 3 Parameter settings for the data acquisition mechanism displayed on the control mechanism of the present invention; Figure 4 The data curve collected by the pump inlet pressure transmitter displayed on the control mechanism of the present invention; Figure 5 The data curve collected by the pump outlet pressure transmitter displayed on the control mechanism of the present invention; Figure 6 The data curve collected by the tank pressure transmitter is displayed on the control mechanism of the present invention; Figure 7 The data curve collected by the pump outlet temperature sensor displayed on the control mechanism of the present invention; Figure 8 The data curve collected by the temperature sensor after air temperature gasification displayed on the control mechanism of the present invention; Figure 9 The data curve collected by the temperature sensor after water bath heating displayed on the control mechanism of the present invention; Figure 10 The data curve collected by the storage tank temperature sensor displayed on the control mechanism of the present invention; Figure 11 A total curve graph collected by the temperature sensor displayed on the control mechanism of the present invention; Figure 12 A test record sheet of the present invention; Reference numerals: 11. Liquid material storage bottle; 12. Gas-liquid separator; 13. Cryogenic pump; 14. Air-temperature vaporizer; 15. Water bath heater; 16. Gaseous material storage tank; 17. Vent pipe; 18. Flame arrester; 21. Pump inlet pressure transmitter; 22. Pump outlet pressure transmitter; 23. Storage tank pressure transmitter; 24. Pump outlet temperature sensor; 25. Air temperature vaporization temperature sensor; 26. Water bath heater temperature sensor; 27. Water bath heating temperature sensor; 28. Storage tank temperature sensor; 31. Liquid inlet main valve; 32. Storage tank air inlet valve; 33. Pre-cooling vent valve; 34. Pipeline vent valve; 35. Storage tank vent valve. DETAILED DESCRIPTION

[0020] The following will provide a clear and complete description of the concept, specific structure and technical effects of the present invention in conjunction with the embodiments and drawings, so as to fully understand the purpose, features and effects of the present invention.

[0021] Example 1 A high-pressure gas supply principle verification system, comprising: High-pressure hydrogen / oxygen supply mechanism, which is used to pressurize and gasify liquid oxygen or liquid hydrogen materials to obtain high-pressure gas materials and store them; A data acquisition mechanism is installed on the high-pressure hydrogen / oxygen supply mechanism and is used to collect the pressure of the material before and after pressurization, the temperature of the material before and after gasification, and the pressure and temperature of the stored gas material during the supply process of the high-pressure hydrogen / oxygen supply mechanism; Valve mechanism, the valve mechanism is installed on the pipeline of the high-pressure hydrogen / oxygen supply mechanism to control the on-off of the pipeline; The control mechanism is respectively connected to the high-pressure hydrogen / oxygen supply mechanism, the data acquisition mechanism, and the valve mechanism to control the operation of the high-pressure hydrogen / oxygen supply mechanism and the valve mechanism, and uses the data collected by the data acquisition mechanism to verify the supply principle of the high-pressure hydrogen / oxygen supply mechanism.

[0022] like Figure 1As shown, the high-pressure hydrogen / oxygen supply mechanism includes a liquid material storage bottle 11, a gas-liquid separator 12, a cryogenic pump 13, an air-temperature vaporizer 14, a water bath heater 15 and a gaseous material storage tank 16, which are sequentially connected through a delivery pipeline; the liquid material storage bottle 11 stores liquid low-temperature liquid oxygen or liquid hydrogen material, and the liquid material is transported to the cryogenic pump 13 for pressurization through the gas-liquid separator 12. The pressurized liquid material is sequentially transported to the air-temperature vaporizer 14 and the water bath heater 15 for vaporization and heating. The gaseous material after vaporization and heating is stored in the gaseous material storage tank 16, thereby realizing the supply of high-pressure hydrogen / oxygen.

[0023] In this embodiment, the liquid material storage bottle 11 is used to store liquid oxygen or liquid hydrogen materials; the gas-liquid separator 12 is used to separate the gas and liquid of the material, the gas material is emptied, and the liquid material enters the low-temperature pump 13 for pressurization; the low-temperature pump 13 is used to pressurize the low-temperature liquid oxygen or liquid hydrogen material; the air-temperature vaporizer 14 is used to vaporize the liquid oxygen or liquid hydrogen material, the water bath heater 15 is used to heat the material, and the gaseous material storage tank 16 is used to store the high-temperature gas material after heating and vaporization.

[0024] like Figure 1 As shown, the high-pressure hydrogen / oxygen supply mechanism also includes a vent pipe 17 and a flame arrester 18. The flame arrester 18 is assembled at the tail end of the vent pipe 17. The front end of the vent pipe 17 is connected to the front end conveying pipeline of the gas-liquid separator 12, the gas end separation outlet of the gas-liquid separator 12, the return air port of the cryogenic pump 13, the rear end conveying pipeline of the water bath heater 15, and the gaseous material storage tank 16 through a vent branch pipe, and they are vented respectively. The flame arrester 18 is used to prevent fire.

[0025] like Figure 1 As shown, the data collection mechanism includes: The pump inlet pressure transmitter 21 mounted on the delivery pipeline at the front end of the gas-liquid separator 12 is used to collect the material pressure data at the inlet of the cryogenic pump 13; The pump outlet pressure transmitter 22 mounted on the delivery pipeline at the rear end of the cryogenic pump 13 is used to collect the pressure data of the material after the cryogenic pump 13 pressurizes the material; The tank pressure transmitter 23 mounted on the delivery pipeline at the front end of the gaseous material storage tank 16 is used to collect the material pressure data in the gaseous material storage tank 16; A pump outlet temperature sensor 24 mounted on the delivery pipe at the rear end of the cryopump 13 is used to collect temperature data of the material at the outlet of the cryopump 13; The air-temperature post-gasification temperature sensor 25 mounted on the delivery pipe at the rear end of the air-temperature gasifier 14 is used to collect the temperature data of the material after gasification in the air-temperature gasifier 14; A water bath heater temperature sensor 26 mounted on the water bath heater 15 is used to collect temperature data in the water bath heater 15; The post-water bath heating temperature sensor 27 mounted on the delivery pipe at the rear end of the water bath heater 15 is used to collect the material temperature data after being heated by the water bath heater 15; The storage tank temperature sensor 28 mounted on the gaseous material storage tank 16 is used to collect temperature data of the material in the gaseous material storage tank 16 .

[0026] like Figure 1 As shown, the valve mechanism includes: The main liquid inlet valve 31 is installed on the delivery pipeline at the front end of the gas-liquid separator 12 and is used to control the liquid inlet as a whole; The tank air inlet valve 32 mounted on the front end delivery pipeline of the gaseous material storage tank 16 is used to control the delivery of high-pressure gas material into the gaseous material storage tank 16; The pre-cooling vent valve 33 installed on the vent branch pipe between the vent pipe 17 and the return gas port of the cryogenic pump 13 is used for pre-cooling and venting the material; The pipeline vent valve 34 is installed on the vent branch pipe between the vent pipe 17 and the rear end delivery pipe of the water bath heater 15, which is used for pipeline venting; The tank vent valve 35 is installed on the vent branch pipe between the vent pipe 17 and the gaseous material storage tank 16, and is used to vent the gaseous material storage tank 16; The main vent valve is assembled at the tail end of the vent pipe 17.

[0027] In this embodiment, the verification system composition refers to verifying that the high-pressure hydrogen / oxygen supply mechanism includes a liquid material storage bottle 11, a gas-liquid separator 12, a cryogenic pump 13, an air-temperature vaporizer 14, a water bath heater 15 and a gaseous material storage tank 16 which are connected in sequence through a conveying pipeline.

[0028] The operating principle and working process of the verification system refer to: verifying that the gas-liquid separator 12 separates the material into gas and liquid, the gaseous material is emptied, the liquid material enters the low-temperature pump 13 for pressurization, the air-temperature vaporizer 14 and the water bath heater 15 vaporize and heat the high-pressure material, and transport it to the gaseous material storage tank 16 for storage.

[0029] Verification of key technologies and main indicators refers to: verifying the pressure of the pipelines before and after the cryogenic pump 13 to verify that the cryogenic pump 13 pressurizes the material; verifying the temperature before and after the air-temperature vaporizer 14 and the water bath heater 15 to verify that they vaporize and heat the material; verifying the pressure and temperature in the gaseous material storage tank 16 to verify its storage conditions.

[0030] Example 2 This embodiment further explains the control mechanism based on the above embodiment. The control mechanism includes a PLC and a host computer; The PLC is respectively connected to the high-pressure hydrogen / oxygen supply mechanism, the data acquisition mechanism, and the valve mechanism, and the host computer is connected to the PLC; The PLC is SIMATIC S7-1200 and is programmed using Siemens Portal programming software. The host computer is equipped with the Easy Control World small network distributed control system software from Beijing Jiusi Software Company.

[0031] High-pressure gas medium supply test systems require high levels of safety, stability, and reliability. To meet these product testing requirements, a distributed intelligent control system design centered around a PLC control system was proposed. Data and related charts and curves were stored and displayed using a remote control host system comprised of a high-quality brand desktop computer, domestic configuration software, and a supporting network switch. The PLC utilizes a Siemens S7-1200 series host computer and expansion modules, the desktop computer a Lenovo business desktop computer, and the touch screen a standard 10-inch Kunlun Tongtai screen. Data from the electrical instruments on the test skid is transmitted to the PLC in real time via on-site pressure and temperature transmitters, where it is stored, analyzed, calculated, and processed.

[0032] The upper computer configuration software adopts the latest small network distributed control system software of Beijing Jiusiyi (Easy Control) Software Company to complete data collection, process flow control dynamic screen generation, safety monitoring, etc.

[0033] Easy Control World is a new automation monitoring and information system platform developed by Beijing Jiusi Automation Software Co., Ltd. over five years. Easy Control World products cover all automation monitoring and information functions between the enterprise management level and the field level, meeting the needs of the integration of industrialization and informationization in the manufacturing industry. It also provides an ideal system platform for many non-traditional automation control fields such as agriculture, transportation, logistics, security, environmental protection, various data centers, etc.

[0034] E-control's new positioning: E-control goes beyond traditional DCS functions to become a truly automated monitoring and information platform. It connects monitoring from the field level to the enterprise management level, solving the problem of isolated monitoring information islands. Its functions inherently have the ability to build large systems. At the same time, its open architecture design can integrate customer business-level functions to form a large system. Furthermore, E-control's unique functional design makes it easy to build professional systems for a wider range of vertical industries. E-control is based on the .Net Framework 4.0 platform, supports Windows 7 and Windows 8, and will be cross-platform in the future. Dynamic language technology greatly accelerates compilation speed, and WPF controls can be used directly. Each function adopts an independent modular design, and the IO system, graphics system, etc. can operate independently and be closely integrated with the user's own business system. At the same time, it has better scalability to meet the needs of future large-scale monitoring systems or other professional systems. E-control products offer international versions for use around the world.

[0035] Artistic Design: Easy Control World offers reports in a variety of standard formats, such as Excel, PDF, and HTML, completely breaking away from the proprietary report formats of traditional automated monitoring software. It provides real-time reports, historical reports, alarm reports, message reports, and any other system content the user desires. Report operations are identical to Excel and can be designed in Excel and then imported into Easy Control World. Statistics in any specified Excel format are supported, and analysis and display can be performed in reports using various formats, such as bar charts and curves, allowing for mixed chart layouts.

[0036] Flexible message system: E-control's message system completely breaks through the event concept of configuration software and has a rich message generation mechanism. Any event of interest to the user that occurs during the operation of the monitoring system can generate corresponding messages. At the same time, it can manage messages from the source, thereby realizing message display, response / confirmation processing, multi-channel forwarding, online printing, storage, and message service provision, supporting large-scale message server applications.

[0037] Image data monitoring, powered by the EasyControl video platform: EasyControl's powerful video platform enables basic functions such as video monitoring, recording and playback, screenshots and playback, and more. It also features OSD subtitles, map navigation, preset points, cruise paths, arming / disarming, broadcasting, and intercom. The system enables deep linkage between video images and production or environmental data and supports large-scale video network applications. Its distributed monitoring design can expand the number of video surveillance cameras to hundreds or even thousands.

[0038] Signature prevention, playback analysis, and E-Control's comprehensive safety protection and accident locating system: E-Control's safety protection system meets the increasingly stringent safety requirements of production processes. The digital signature function, combined with the E-Control's messaging system, ensures the integrity, authenticity, and non-repudiation of production data, meeting the specific needs of industries like pharmaceutical machinery. The project playback function replays the changes in a specified image over a specified time period, and can also replay operational conditions, facilitating accident location and analysis.

[0039] Information integration and unlimited expansion: Easy Control World facilitates external access capabilities for large-scale information platforms: In large-scale automated monitoring and information management platforms, data acquisition and monitoring systems also need to provide interactive access to other systems within the platform. Therefore, data within the monitoring system should be easily and quickly shared. Easy Control World software provides external access capabilities, offering multiple ways to share Easy Control project data, such as databases, standard file formats (Excel, TXT), email, text messages, and phone calls. Other software or functions in the system can also utilize external access capabilities to modify data within the Easy Control project or trigger specified events.

[0040] Data acquisition: Easycontrol supports a variety of I / O communication functions. It can connect to production line equipment through the enterprise LAN or wireless communication. It can also interact with equipment by accessing database tables or data files to realize the digitization of workshop equipment. It also provides data services such as OPC, Modbus master station, Webservice, etc., providing a unified and open data interface within the enterprise, thus providing the basic conditions for the enterprise to realize the information platform.

[0041] The SIMATIC S7-1200 controller features a modular and compact design, offering powerful functionality, a secure investment, and perfect adaptation to a wide range of applications. Its highly scalable and flexible design, communication interfaces for the highest standards of industrial communication, and a comprehensive suite of integrated technology features make it a key component of a complete, comprehensive automation solution. The SIMATIC S7-1200 system includes five different modules: the CPU 1211C, CPU 1212C, CPU 1214C, CPU 1215C, and CPU 1217C. Each module can be expanded to perfectly meet your system needs. A signal board can be added to the front of any CPU to easily expand digital or analog I / O without affecting the controller's footprint. Signal modules can be connected to the right side of the CPU to further expand digital or analog I / O capacity. The CPU 1212C supports two signal modules, while the CPUs 1214C, 1215C, and 1217C support eight signal modules. Finally, all SIMATIC S7-1200 CPU controllers can be connected to up to three communication modules on the left side to facilitate end-to-end serial communication.

[0042] All SIMATIC S7-1200 hardware features built-in clips for easy and convenient mounting on standard 35mm DIN rails. These built-in clips can also be snapped into place in an extended position, providing mounting holes when panel mounting is required. SIMATIC S7-1200 hardware can be mounted in either a horizontal or vertical position, providing additional mounting options. These integrated features provide users with maximum flexibility during installation and make the SIMATIC S7-1200 a practical solution for a wide range of applications.

[0043] All SIMATIC S7-1200 hardware is specifically designed to save space in control panels. For example, the CPU1214C measures just 110 mm wide, while the CPU1212C and CPU 1211C are just 90 mm wide. Combined with the small footprint of communication and signal modules, this modular, compact system saves valuable space during installation, providing you with maximum efficiency and flexibility.

[0044] SIMATIC S7-1200 is a modular concept for scalable compact automation that enables simple communication, effective technical task solutions, and fully meets a range of independent automation requirements.

[0045] Introduction to Siemens Portal programming software: Siemens' new PLC programming software, the TIA Portal software configuration framework, systematically combines all automation configuration and design within a single development environment. This marks a milestone in software development, becoming the first automation software in the industrial field to offer a "configuration and design environment." A single software project can address a wide range of automation tasks.

[0046] The TIA Portal user interface is highly intuitive and designed with navigation features. It leverages proven technologies while also offering several key innovations. This framework further reduces configuration time and costs, whether for development, installation, testing, or maintenance and expansion of automation systems. The TIA Portal's software editors are based on a common layout and navigation scheme. Editors for each environment—whether hardware configuration, logic programming, drive parameterization, or HMI screen design—are designed identically and intuitively, saving time and reducing costs. Functions, properties, and libraries are automatically displayed in intuitive views as needed. "Smart drag and drop" allows for easy switching between editors, and numerous useful features, such as automatic variable completion, are included. These editors enable users to design complete automation systems, not just individual components. The framework offers an attractive design. The TIA Portal offers a cutting-edge software architecture based on a simple navigation scheme. The ergonomic design of the TIA Portal ensures high productivity and minimizes time. All editors are clearly laid out and extremely easy to use. You always have an overview of your entire project, without having to navigate through complex menus or structures. From the very beginning of project design, the Portal view allows you to quickly open all editors for controller programming, visualization, network connection configuration, or online access. The project view supports a task-oriented approach, allowing both novice and experienced designers to achieve the highest possible productivity using the Portal software.

[0047] In this embodiment, the liquid inlet main valve 31, the storage tank air inlet valve 32, the pre-cooling vent valve 33, the pipeline vent valve 34, and the storage tank vent valve 35 are all air-controlled valves. The air-controlled valves are Magsvait 21V4M071-YMNC-MONEL type, with a design pressure of 155 MPa, an operating pressure of 50 MPa, a medium of pure oxygen, a diameter of 2.7 / 8 mm, a material in contact with the medium of Monel alloy, and an operating temperature of 150°C.

[0048] In this embodiment, for the pressure transmitter and temperature sensor, the input and output signals are 0-5V; 1-5V; 4-20mA.

[0049] In this embodiment, for the high-pressure transmission pipeline, the transmission pipeline is a monel alloy pipe with an outer diameter of 25 mm and a wall thickness of 5 mm. The transmission pipeline is free of oil and solid particles to maintain the smoothness of the inner surface of the transmission pipeline.

[0050] The material of oxygen piping should be selected based on the oxygen pressure, temperature, and flow rate in the pipe. In addition to meeting the same strength requirements as other pipes, oxygen piping also needs to be corrosion-resistant, rust-resistant, and fire-resistant.

[0051] Considering the temperature conditions, oxygen pipelines under normal temperature conditions are generally made of steel pipes. However, in oxygen production equipment, due to the low temperature of steel at -40 The following are cold brittle, so for pipes working under low temperature conditions, aluminum alloy, copper alloy or stainless steel must be used. These materials still have good strength and toughness at low temperatures.

[0052] Considering the pressure conditions, brass or copper pipes are used for oxygen pipelines with working pressures greater than 3 MPa. For pressures less than 3 MPa, seamless steel pipes are generally used. To prevent friction on the pipe wall caused by high-pressure oxygen flow and possible combustion of the pipe caused by small combustion products, the oxygen flow rate in carbon steel pipelines should be limited.

[0053] In summary: High-pressure oxygen pipelines use Monel alloy (42MPa) and brass (11MPa) pipelines. According to the system's maximum pressure requirement (56MPa), the tensile strength of Monel alloy is 1000MPa.

[0054] According to the above information and the relevant information in the technical requirements, Monel alloy (allowable stress 300MPa at room temperature) is selected. Since the maximum design pressure exceeds 35Mpa, the current standard only refers to JB 4732-1995 (the applicable pressure range is greater than or equal to 0.1Mpa and less than 100Mpa).

[0055] Refer to JB 4732-1995 "Steel Pressure Vessels - Analysis and Design Standards" page 37 for the calculation formula for the thickness of the cylinder subject only to internal pressure: Wall thickness Where: D i —Calculated inner diameter, mm; K—Load combination coefficient, according to Table 3-3, k is 1 —Proof pressure (test pressure), MPa; —Pipe wall thickness, mm; —Allowable stress of the material at design temperature in MPa.

[0056] Bring in , , The wall thickness can be calculated as: Considering the actual safety factors, Monel alloy pipe 25 (outer diameter) * 5mm is selected to meet the requirements.

[0057] Example 3 A method for verifying the principle of high-pressure gas supply comprises the following steps: S1. Perform strength test and degreasing treatment on the principle verification system; In step S1, the strength test is carried out with clean water, the test pressure is 1.25 times the design pressure, and oil-free nitrogen is used for blowing after the strength test; In step S1, carbon tetrachloride is used as a degreasing agent for degreasing the equipment using a segmented convection circulation method.

[0058] S2. Vacuum the proof-of-principle system, including the following steps: S21, connect the vacuum system to the outlet of the gaseous material storage tank 16, and connect the nitrogen bottle to the inlet of the liquid inlet main valve 31; S22. Close the manual valves for the nitrogen cylinder inlet and outlet, open the liquid inlet main valve 31, pre-cooling vent valve 33, pipeline vent valve 34, and storage tank vent valve 35, and keep other valves closed; S23, start the vacuum system to perform vacuum operation, pump the vacuum to below 20 Pa, and maintain the pressure for 0.5 hours. If the vacuum degree drops abnormally during the pressure maintenance period, it indicates that there is a leak in the pipeline. After treatment, restart the operation; repeat the vacuum operation until the vacuum is below 20 Pa; S24, close the vacuum system and the vacuuming is completed.

[0059] S3, using nitrogen to conduct system coordination and testing, filling nitrogen into the gaseous material storage tank 16 and checking the air tightness, including the following steps: S31. Open the manual valves at the inlet and outlet of the nitrogen cylinder, then slowly open the valve on the nitrogen cylinder, open the liquid inlet main valve 31, the pre-cooling vent valve 33, the pipeline vent valve 34, and the storage tank vent valve 35; S32: Start the cryopump 13, and the inlet pipe of the cryopump 13 enters the pre-cooling state. When the inlet of the cryopump 13 is in liquid state, close the pre-cooling vent valve 33, the pipe vent valve 34, and the tank vent valve 35, and the pressurization stage is officially entered; S33. After the pressure of the tank pressure transmitter 23 reaches 45MPa, maintain it for 30 minutes and then conduct an air tightness check; observe whether the pressure of the tank pressure transmitter 23 changes. If it decreases, it indicates that there is a leak in the pipeline. After inspection and treatment, retest; S34. After the air tightness check is completed, close the liquid inlet main valve 31 and open the tank vent valve 35 to exhaust the gas until the pressure of the tank pressure transmitter 23 reaches 0 MPa, then close the tank vent valve 35.

[0060] S4. Conduct a formal test of the principle verification system using oxygen or hydrogen. During the formal test, the data acquisition mechanism collects the pressure of the material before and after pressurization, the temperature of the material before and after vaporization, and the pressure and temperature of the stored gas material during the supply process of the high-pressure hydrogen / oxygen supply mechanism, and sends the collected data to the control mechanism. The control mechanism processes the collected data and outputs a real-time curve chart of the pressure and temperature test indicators versus time, including the following steps: S41, connecting the liquid material storage bottle 11 filled with hydrogen or oxygen to the inlet end of the liquid inlet main valve 31; S42. Open the manual valve of the liquid material storage bottle 11, slowly open the valve on the storage bottle, and evacuate the site; S43, open the liquid inlet main valve 31, the pre-cooling vent valve 33, the pipeline vent valve 34, and the storage tank vent valve 35, start the cryopump 13, and the inlet pipeline of the cryopump 13 enters the pre-cooling state. When the inlet of the cryopump 13 is in liquid state, close the pre-cooling vent valve 33, the pipeline vent valve 34, and the storage tank vent valve 35, and the pressurization stage is officially entered; S44. After the pressure of the storage tank pressure transmitter 23 reaches 45 MPa, maintain it for 10 minutes and observe whether the pressure of the storage tank pressure transmitter 23 changes. If there is no decrease, close the liquid inlet main valve 31 and open the storage tank vent valve 35 to exhaust the oxygen or hydrogen in the gaseous material storage tank 16. After the pressure of the storage tank pressure transmitter 23 reaches 0.1 MPa, close the storage tank vent valve 35 and enter the next round of test procedures. S45. Repeat steps S43-S44 multiple times to complete the test.

[0061] The high-pressure gas in this embodiment is oxygen, specifically as follows: 1. Strength test After manufacturing is complete, strength and airtightness testing is required based on the test verification process and design requirements. The strength test is conducted using clean water at a test pressure of 1.25 times the design pressure. After the strength test, the cylinder should be thoroughly purged with oil-free nitrogen to ensure internal cleanliness before the airtightness test. The test method complies with the requirements of JB 4732-1995, "Standard for Analysis and Design of Steel Pressure Vessels."

[0062] 2. Degreasing All pipelines, equipment and containers should be cleaned and degreased before the test.

[0063] Degreasing process plan. Degreasing is a critical step in ensuring the safe operation of equipment. When oxygen, combustibles, and an excitation energy source are present—the "three elements"—combined, serious consequences such as combustion or explosion can occur. Degreasing operations are designed to maximize the removal of inherent grease (combustibles) within the pipeline project from an installation perspective and minimize the entry of combustibles such as grease and particulates into the system during the construction phase, thereby reducing safety risks in oxygen pipeline projects. Carbon tetrachloride, which has a relatively high degreasing effect, is used as a degreasing agent, and a segmented convection circulation method is employed for equipment degreasing.

[0064] 3. Air tightness test Since the operating pressure of the gas equipment is designed with a safety design value in mind, the air tightness test is conducted at the design operating pressure for safety reasons. Before the air tightness test, the cylinder should be thoroughly purged with oil-free nitrogen to ensure internal cleanliness. The air tightness test is conducted during the nitrogen test. Equipment installation: The equipment under test, gas source, bracket, and low-pressure control solenoid valve assembly are in place.

[0065] Pipeline connection, connect the system high-pressure pipe, compensation gas source pipe, high-pressure gas control valve, and low-pressure gas pipe; note that after the connection is completed, the entire pipeline needs to be blown before connecting to the equipment to remove impurities and ensure the cleanliness of the pipeline, thereby ensuring the cleanliness of the gas entering the equipment.

[0066] 4. Vacuum treatment of pipelines and connection of liquid oxygen pipelines and nitrogen cylinders After the test system is assembled and ready, Party A will be notified whether to send personnel to participate in the system joint commissioning test. Before the system joint commissioning test, all instruments and meters used for on-site testing must be verified and qualified and must be used within the validity period.

[0067] After the degreasing process is completed, all pipelines should be vacuumed first.

[0068] First, connect the vacuum system to the outlet of the V-202 oxygen storage tank and connect the nitrogen cylinder (with the nitrogen cylinder valve closed) to the air inlet of the pneumatic valve XV201.

[0069] Close the manual valves at the inlet and outlet of the nitrogen cylinder group, open the pneumatic valves XV201, XV202, XV203, and XV204, and keep the other valves closed.

[0070] Turn on the vacuum pump and start the vacuum operation. Pump down to below 20 Pa and maintain the pressure for 0.5 hours. If the vacuum level drops abnormally during the pressure maintenance period, it indicates a leak in the pipeline. After repairing it, restart the operation. Repeat the vacuum operation until it is below 20 Pa.

[0071] Turn off the vacuum pump system and the vacuum pumping is completed.

[0072] 5. Use nitrogen for system coordination and testing During the entire system test verification and test process, the detection temperature of the TE205 temperature sensor cannot exceed 0-40℃.

[0073] Fill the V-202 oxygen tank with nitrogen and check for airtightness.

[0074] First, open the manual inlet and outlet valves of the nitrogen cylinder assembly. Then, slowly open the valve on the nitrogen cylinder, open pneumatic valves XV201, XV202, XV203, and XV204, and open all safety valves and root valves. Start the P-201 liquid oxygen pump. The liquid oxygen pump inlet pipeline enters the pre-cooling state. When the liquid oxygen pump inlet is liquid, close pneumatic valves XV202, XV203, and XV204. This officially enters the pressurization phase. After the pressure of the PT202 pressure transmitter reaches 45 MPa, maintain it for 30 minutes and then perform an airtightness check. Observe the pressure of the PT202 pressure transmitter for any changes. If there is a drop in pressure, it indicates a leak in that section of the pipeline. Check and address it before retesting.

[0075] After the air tightness check is completed, close the pneumatic valve XV201 and open the pneumatic valve XV203 to exhaust. After the pressure of the PT202 pressure transmitter reaches 0MPa, close the pneumatic valve XV203.

[0076] During the test, record all parameters, including pressure and temperature, video data (if any), etc.

[0077] If abnormal temperature, pressure or deformation occurs during the test, the test should be stopped immediately (the stopping procedure is: all air control valves are in the closed state).

[0078] 6. Conduct formal tests with oxygen After the system test is verified with nitrogen and the formal test requirements are met, the formal test begins.

[0079] During the entire system test verification and test process, the detection temperature of the TE205 temperature sensor cannot exceed 0-40℃.

[0080] The pipelines and liquid-liquid oxygen cylinders are connected and the pipelines are vacuumed.

[0081] Connect the liquid oxygen cylinder group (the valve of the liquid oxygen cylinder group is closed) to the air inlet end of the pneumatic valve XV201 and the air outlet end of the pneumatic valve XV202.

[0082] First, open the manual inlet and outlet valves of the liquid oxygen cylinder group, then slowly open the valves on the liquid oxygen cylinders. Evacuate the site. Open pneumatic valves XV201, XV202, XV203, and XV204, and open all safety valves and root valves. Start the P-201 liquid oxygen pump. The liquid oxygen pump inlet pipeline enters the pre-cooling state. When the liquid oxygen pump inlet is liquid, close pneumatic valves XV202, XV203, and XV204. This officially enters the pressurization phase. Wait for the pressure on the PT202 pressure transmitter to reach 45 MPa and maintain it for 10 minutes. Observe the pressure on the PT202 pressure transmitter for any changes. If there is no decrease, open the bypass pneumatic valve of the safety valve to drain the oxygen from the V-202 oxygen storage tank. Wait until the pressure on the PT202 pressure transmitter reaches 0.1 MPa, then close the bypass pneumatic valve of the safety valve and proceed to the next round of testing procedures.

[0083] Repeat the above operation 10 times to complete the experiment.

[0084] Since the exhaust gas is pure oxygen, high-concentration oxygen clouds are easily formed in the area around the exhaust. Personnel should wait 0.5 hours before arriving at the site to start subsequent tests.

[0085] In this embodiment, for the data processing of the control mechanism, each temperature and pressure data is presented in the form of a curve, where the X-axis of the curve is time and the Y-axis is the value of each parameter, such as Figure 3 The parameter settings shown, and Figure 4-11 The test curve diagram, Figure 12 Test record sheet.

[0086] After experimental verification, the conclusions are as follows: (1) Use a liquid oxygen pump to pressurize the liquid oxygen, then use an air-temperature vaporizer and a water-bath vaporizer to vaporize it. The pressure after vaporization should not exceed 45 MPa. The oxygen should be stored at room temperature. This technical solution is feasible. The liquid oxygen pump meets the requirements, and the air-temperature vaporizer and water-bath vaporizer are reasonably designed and correctly calculated.

[0087] (2) It is feasible to discharge 45MPa normal temperature oxygen directly into the air.

[0088] Experience: Strictly control oil and solid particles in oxygen pipelines. Focus on the smoothness of the pipeline's inner surface. Focus on eliminating static electricity. Use monel alloy for steel that comes into contact with high-pressure oxygen.

[0089] Recommendation: It is recommended to use multi-stage pressure reduction venting for high-pressure oxygen venting (the number of pressure reduction stages for high pressure 21MPa to be lower than 45MPa is not less than 3).

[0090] The above is a detailed description of the embodiments of the present invention, but the present invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without departing from the spirit of the present invention. These equivalents or substitutions are all included in the scope defined by the claims of the present invention.

Claims

1. A high-pressure gas supply principle verification system, characterized in that: include: A high-pressure hydrogen / oxygen supply mechanism, which is used to pressurize and gasify liquid oxygen or liquid hydrogen materials to obtain high-pressure gas materials and store them; A data acquisition mechanism, the data acquisition mechanism being mounted on the high-pressure hydrogen / oxygen supply mechanism and being used to collect the pressure of the material before and after pressurization, the temperature of the material before and after gasification, and the pressure and temperature of the stored gas material during the supply process of the high-pressure hydrogen / oxygen supply mechanism; A valve mechanism, which is mounted on a pipeline of a high-pressure hydrogen / oxygen supply mechanism to control the on / off state of the pipeline; The control mechanism is respectively connected to the high-pressure hydrogen / oxygen supply mechanism, the data acquisition mechanism, and the valve mechanism to control the operation of the high-pressure hydrogen / oxygen supply mechanism and the valve mechanism, and uses the data collected by the data acquisition mechanism to verify the supply principle of the high-pressure hydrogen / oxygen supply mechanism.

2. A high-pressure gas supply principle verification system according to claim 1, characterized in that: The high-pressure hydrogen / oxygen supply mechanism comprises a liquid material storage bottle (11), a gas-liquid separator (12), a cryogenic pump (13), an air-temperature vaporizer (14), a water bath heater (15) and a gaseous material storage tank (16) which are sequentially connected through a delivery pipeline; the liquid material storage bottle (11) stores liquid low-temperature liquid oxygen or liquid hydrogen material; the liquid material is transported to the cryogenic pump (13) through the gas-liquid separator (12) for pressurization; the pressurized liquid material is sequentially transported to the air-temperature vaporizer (14) and the water bath heater (15) for gasification and heating; the gaseous material after gasification and heating is stored in the gaseous material storage tank (16); The high-pressure hydrogen / oxygen supply mechanism also includes a vent pipe (17) and a flame arrester (18), wherein the flame arrester (18) is assembled at the tail end of the vent pipe (17), and the front end of the vent pipe (17) is connected to the front end delivery pipeline of the gas-liquid separator (12), the gas end separation outlet of the gas-liquid separator (12), the return air port of the cryogenic pump (13), the rear end delivery pipeline of the water bath heater (15), and the gaseous material storage tank (16) through a vent branch pipe.

3. A high-pressure gas supply principle verification system according to claim 2, characterized in that: The data collection mechanism includes: A pump inlet pressure transmitter (21) mounted on a delivery pipeline at the front end of the gas-liquid separator (12); A pump outlet pressure transmitter (22) mounted on a delivery pipeline at the rear end of the cryogenic pump (13); A tank pressure transmitter (23) mounted on a delivery pipeline at the front end of a gaseous material storage tank (16); A pump outlet temperature sensor (24) mounted on a delivery pipe at the rear end of the cryogenic pump (13); An air-temperature post-gasification temperature sensor (25) mounted on a delivery pipe at the rear end of the air-temperature gasifier (14); a water bath heater temperature sensor (26) mounted on the water bath heater (15); A water bath heating temperature sensor (27) mounted on a delivery pipe at the rear end of the water bath heater (15); A storage tank temperature sensor (28) is mounted on the gaseous material storage tank (16).

4. A high-pressure gas supply principle verification system according to claim 3, characterized in that: The valve mechanism comprises: A liquid inlet main valve (31) mounted on a delivery pipeline at the front end of the gas-liquid separator (12); A tank air inlet valve (32) mounted on a front-end delivery pipeline of a gaseous material storage tank (16); A pre-cooling vent valve (33) mounted on a vent branch pipe between the vent pipe (17) and the return gas port of the cryogenic pump (13); A pipe vent valve (34) is mounted on a vent branch pipe between the vent pipe (17) and the rear end delivery pipe of the water bath heater (15); A tank vent valve (35) mounted on a vent branch pipe between the vent pipe (17) and the gaseous material storage tank (16); The main vent valve is installed at the end of the vent pipe (17).

5. A high-pressure gas supply principle verification system according to claim 4, characterized in that: The control mechanism includes a PLC and a host computer; The PLC is respectively connected to the high-pressure hydrogen / oxygen supply mechanism, the data acquisition mechanism, and the valve mechanism, and the host computer is connected to the PLC; The PLC is SIMATIC S7-1200 and is programmed using Siemens Portal programming software. The host computer is equipped with Beijing Jiusiyi Software Company's Easy Control World small network distributed control system software. The liquid inlet main valve (31), the tank air inlet valve (32), the pre-cooling vent valve (33), the pipeline vent valve (34), and the tank vent valve (35) are all air-controlled valves, and the air-controlled valves are Magsweit 21V4M071-YMNC-MONEL type; The conveying pipeline is a monel alloy pipe with an outer diameter of 25 mm and a wall thickness of 5 mm. The conveying pipeline removes oil stains and solid particles and maintains the smoothness of the inner surface of the conveying pipeline.

6. A method for verifying the principle of high-pressure gas supply based on the system according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1. Perform strength test and degreasing treatment on the principle verification system; S2. Vacuum the proof-of-principle system; S3. Use nitrogen to conduct system coordination and testing, fill nitrogen into the gaseous material storage tank (16) and check the airtightness; S4. Conduct formal tests on the principle verification system using oxygen or hydrogen. During the formal test, the data acquisition mechanism collects the pressure of the material before and after pressurization, the temperature of the material before and after gasification, and the pressure and temperature of the stored gas material during the supply process of the high-pressure hydrogen / oxygen supply mechanism, and sends the collected data to the control mechanism. The control mechanism processes the collected data and outputs a real-time curve chart of the pressure and temperature test indicators and time.

7. A high-pressure gas supply principle verification method according to claim 6, characterized in that: In step S1, the strength test is carried out using clean water, the test pressure is 1.25 times the design pressure, and oil-free nitrogen is used for blowing after the strength test; In step S1, the degreasing treatment uses carbon tetrachloride as a degreasing agent and adopts a segmented convection circulation method to degrease the equipment.

8. A method for verifying the principle of high-pressure gas supply according to claim 6, characterized in that: In step S2, the vacuum treatment includes the following steps: S21, connect the vacuum system to the outlet of the gaseous material storage tank (16), and connect the nitrogen bottle to the inlet of the liquid inlet main valve (31); S22, close the manual valves for the inlet and outlet of the nitrogen cylinder, open the main liquid inlet valve (31), the pre-cooling vent valve (33), the pipeline vent valve (34), and the tank vent valve (35), and keep the other valves closed; S23, start the vacuum system to perform vacuum operation, pump the vacuum to below 20 Pa, and maintain the pressure for 0.5 hours. If the vacuum degree drops abnormally during the pressure maintenance period, it indicates that there is a leak in the pipeline. After treatment, restart the operation; repeat the vacuum operation until the vacuum is below 20 Pa; S24, close the vacuum system and the vacuuming is completed.

9. A method for verifying the principle of high-pressure gas supply according to claim 8, characterized in that: The S3 step includes the following steps: S31, open the manual valves at the inlet and outlet of the nitrogen cylinder, then slowly open the valve on the nitrogen cylinder, open the liquid inlet main valve (31), the pre-cooling vent valve (33), the pipeline vent valve (34), and the storage tank vent valve (35); S32, start the cryogenic pump (13), the cryogenic pump (13) inlet pipeline enters the pre-cooling state, when the cryogenic pump (13) inlet is in liquid state, close the pre-cooling vent valve (33), the pipeline vent valve (34), and the tank vent valve (35), and then officially enter the pressurization stage; S33. After the pressure of the tank pressure transmitter (23) reaches 45 MPa, maintain it for 30 minutes and then conduct an air tightness check; observe whether the pressure of the tank pressure transmitter (23) changes. If it decreases, it means that there is a leak in the pipeline. After checking and handling, retest; S34. After the air tightness check is completed, close the main liquid inlet valve (31) and open the tank vent valve (35) to exhaust the air until the pressure of the tank pressure transmitter (23) reaches 0 MPa, then close the tank vent valve (35).

10. A high-pressure gas supply principle verification method according to claim 6, characterized in that: The S4 step includes: S41, connecting the liquid material storage bottle (11) filled with hydrogen or oxygen to the inlet end of the liquid inlet main valve (31); S42, open the manual valve of the liquid material storage bottle (11), slowly open the valve on the storage bottle, and evacuate the site; S43, open the liquid inlet main valve (31), the pre-cooling vent valve (33), the pipeline vent valve (34), and the storage tank vent valve (35), start the cryogenic pump (13), and the cryogenic pump (13) inlet pipeline enters the pre-cooling state. When the cryogenic pump (13) inlet is in liquid state, close the pre-cooling vent valve (33), the pipeline vent valve (34), and the storage tank vent valve (35), and the pressurization stage is officially entered; S44, after the pressure of the tank pressure transmitter (23) reaches 45MPa, maintain it for 10 minutes, observe whether the pressure of the tank pressure transmitter (23) changes, if there is no decrease, close the liquid inlet main valve (31), open the tank vent valve (35) to exhaust, and exhaust the oxygen or hydrogen in the gaseous material storage tank (16), after the pressure of the tank pressure transmitter (23) reaches 0.1MPa, close the tank vent valve (35), and enter the next round of test procedures; S45. Repeat steps S43-S44 multiple times to complete the test.

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