Safety monitoring system for liquid hydrogen refueling station

Abstract

The utility model provides a safety monitoring system for a liquid hydrogen refueling station, which is characterized in that pressure, temperature and noise of each device acquired by a plurality of acquisition units and whether hydrogen leakage exists in each device detected by a detection unit are sent to a conversion unit, analog signals are converted into digital signals by the conversion unit, and the digital signals are input to a controller; the controller uploads the received digital signals to a liquid hydrogen refueling station monitoring system platform through the communication unit, judges whether pressure abnormity, temperature abnormity, noise abnormity and hydrogen leakage exist in each device or not according to the input digital signals, and feeds back judgment results to the controller; and the controller sends a control instruction to an alarm unit or a pressure release valve and a heat dissipation device of each device according to a judgment result to control the alarm unit or the pressure release valve and the heat dissipation device to work or stop working, so that real-time comprehensive monitoring and management of the overall running state of the devices such as a hydrogen storage tank, a pump and a hydrogen refueling machine in the hydrogen refueling station are realized. Therefore, the safety of the liquid hydrogen refueling station is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen refueling stations, in particular to a safety monitoring system for liquid hydrogen refueling stations. Background Art

[0002] Due to its high energy storage density, long cycle life, environmental friendliness, and high power quality, the International Energy Agency (IEA) believes that hydrogen, like oil, can be used for heat, electricity, and transportation. Hydrogen energy conversion produces only water, making it one of the optimal solutions for achieving carbon neutrality.

[0003] For hydrogen refueling stations, high-pressure hydrogen storage equipment is one of its most core components. High-pressure hydrogen storage equipment stores a large amount of high-pressure hydrogen. Once a leak occurs, it is very easy to explode and cause a safety accident.

[0004] Currently, safety monitoring at operating hydrogen refueling stations uses on-site recording of safety equipment status parameters. Paper records and manual inspections are used to verify the proper operation of each safety device. Among the various hidden dangers at hydrogen refueling stations, fire and explosion hazards caused by leaks from hydrogen TT vehicles, hydrogen refueling machines, static electricity, electrical sparks, and open flames are particularly serious.

[0005] Currently, there are three main hydrogenation design concepts in the world:

[0006] Cascade high-pressure hydrogen injection design, boost compression hydrogen injection design, and low-temperature liquid pump hydrogen injection design. However, low-temperature liquid hydrogenation and liquid boosting require less work, lower energy consumption, and do not require cooling devices. Therefore, the operating cost is much lower than that of gaseous hydrogen storage and hydrogenation stations.

[0007] In the past two years, some hydrogen refueling stations have built security video surveillance systems and business management systems. However, these systems can only meet the needs of hydrogen refueling stations for anti-theft and business data management, and do not take advantage of the characteristics of hydrogen refueling station safety monitoring to achieve safety monitoring and management of hydrogen refueling stations from the source of accidents. However, for liquid hydrogen refueling stations, there is a lack of real-time and comprehensive monitoring of the operating status of equipment such as hydrogen storage tanks, pumps, and hydrogen refueling machines, making it impossible to achieve centralized, intelligent and reliable monitoring of the overall operating status of the hydrogen refueling station. Utility Model Content

[0008] The utility model provides a liquid hydrogen refueling station safety monitoring system, the purpose of which is to monitor the overall operating status of equipment such as hydrogen storage tanks, pumps, and hydrogen refueling machines in the hydrogen refueling station in real time and comprehensively.

[0009] In order to achieve the above-mentioned purpose, the utility model provides a liquid hydrogen refueling station safety monitoring system. The liquid hydrogen refueling station includes a cryogenic liquid hydrogen storage tank, a cryogenic liquid pump, an evaporator, a cascade high-pressure hydrogen storage tank, and a hydrogenator. The liquid hydrogen refueling station safety monitoring system includes:

[0010] Liquid hydrogen refueling station monitoring system platform;

[0011] The equipment terminal control system includes a communication unit, a controller, a conversion unit, an alarm unit, a plurality of collection units for collecting the tank pressure of the cryogenic liquid hydrogen storage tank, the tank temperature of the cryogenic liquid hydrogen storage tank, the noise of the cryogenic liquid pump, the tank pressure of the cascade high-pressure hydrogen storage tank, the tank temperature of the cascade high-pressure hydrogen storage tank, the pressure of the hydrogenator, and the temperature of the hydrogenator, and a plurality of detection units for detecting whether the hydrogen in the cryogenic liquid hydrogen storage tank is leaking, whether the hydrogen in the evaporator is leaking, whether the hydrogen in the cryogenic liquid pump is leaking, whether the hydrogen in the cascade liquid hydrogen storage tank is leaking, and whether the hydrogen in the hydrogenator is leaking;

[0012] The controller is connected to the liquid hydrogen station monitoring system platform through a communication unit. The output ends of all acquisition units and detection units are connected to the input end of the controller through a conversion unit. The first output end of the controller is connected to the input end of the alarm unit; the second output end of the controller is respectively connected to the control end of the pressure relief valve in the cryogenic liquid hydrogen storage tank, the control end of the heat dissipation device in the cryogenic liquid hydrogen storage tank, the control end of the pressure relief valve in the cryogenic liquid pump, the control end of the heat dissipation system of the cryogenic liquid pump, the control end of the pressure relief valve in the cascade high-pressure hydrogen storage tank, the control end of the heat dissipation device in the cascade high-pressure hydrogen storage tank, the control end of the pressure relief valve in the hydrogenator, and the control end of the heat dissipation device of the hydrogenator.

[0013] More specifically, the acquisition unit includes:

[0014] A pressure collection subunit for collecting the internal pressure of the cryogenic liquid hydrogen storage tank, the internal pressure of the cascade high-pressure hydrogen storage tank, and the pressure of the hydrogenator;

[0015] A temperature collection subunit for collecting the internal temperature of the low-temperature liquid hydrogen storage tank, the internal temperature of the cascade high-pressure hydrogen storage tank, and the temperature of the hydrogenator;

[0016] A noise collection subunit for collecting noise from a cryogenic liquid pump;

[0017] The output end of the pressure acquisition subunit, the output end of the temperature acquisition subunit, and the output end of the noise acquisition subunit are all connected to the input end of the controller through the conversion unit.

[0018] More specifically, the detection unit includes:

[0019] a first detection unit for detecting whether hydrogen in a cryogenic liquid hydrogen storage tank is leaking;

[0020] A second detection unit for detecting whether hydrogen in the cascade high-pressure hydrogen storage tank is leaking;

[0021] a third detection unit for detecting whether hydrogen in the evaporator is leaking;

[0022] a fourth detection unit for detecting whether hydrogen in the hydrogen refueling machine is leaking;

[0023] a fifth detection unit for detecting whether hydrogen in the cryogenic liquid pump is leaking;

[0024] The output end of the first detection unit, the output end of the second detection unit, the output end of the third detection unit, the output end of the fourth detection unit, and the output end of the fifth detection unit are all connected to the input end of the controller through the conversion unit.

[0025] Furthermore, the liquid hydrogen refueling station safety monitoring system also includes a power supply unit;

[0026] The input terminal of the power supply unit is connected to the mains terminal;

[0027] The output end of the power supply unit is respectively connected to the power supply end of the controller, the power supply end of the conversion unit, the power supply end of the communication unit, and the power supply end of the alarm unit.

[0028] Furthermore, the communication unit includes a wireless communication subunit and a wired communication subunit;

[0029] The data transmission end of the controller is connected to the liquid hydrogen refueling station monitoring system platform through a wireless communication subunit or a wired communication subunit.

[0030] Further, the liquid hydrogen refueling station safety monitoring system includes a storage unit;

[0031] The data transmission end of the storage unit is connected to the data transmission end of the liquid hydrogen refueling station monitoring system platform.

[0032] Furthermore, the liquid hydrogen refueling station safety monitoring system also includes a data encryption unit;

[0033] The data transmission end of the data encryption unit is connected to the data transmission end of the liquid hydrogen refueling station monitoring system platform, and the data transmission end of the data encryption unit is connected to the data transmission end of the storage unit.

[0034] Furthermore, the liquid hydrogen refueling station safety monitoring system also includes a feedback unit;

[0035] The input end of the feedback unit is connected to the second output end of the controller;

[0036] The output end of the feedback unit is respectively connected to the control end of the pressure relief valve in the cryogenic liquid hydrogen storage tank, the control end of the heat dissipation device in the cryogenic liquid hydrogen storage tank, the control end of the pressure relief valve in the cryogenic liquid pump, the control end of the heat dissipation system of the cryogenic liquid pump, the control end of the pressure relief valve in the cascade high-pressure hydrogen storage tank, the control end of the heat dissipation device in the cascade high-pressure hydrogen storage tank, the control end of the pressure relief valve in the hydrogenator, and the control end of the heat dissipation device of the hydrogenator.

[0037] More specifically, the alarm unit includes:

[0038] Voice prompter and warning light;

[0039] The control end of the voice prompter and the control end of the alarm light are both connected to the first output end of the controller.

[0040] The above solution of the utility model has the following beneficial effects:

[0041] The liquid hydrogen refueling station safety monitoring system provided by the present invention includes a liquid hydrogen refueling station monitoring system platform; an equipment terminal control system, including a communication unit, a controller, a conversion unit, an alarm unit, multiple collection units, and multiple detection units; the controller is connected to the liquid hydrogen refueling station monitoring system platform through the communication unit, the output ends of all collection units and the output ends of the detection units are connected to the input end of the controller through the conversion unit, the first output end of the controller is connected to the input end of the alarm unit; the second output end of the controller is respectively connected to the control end of the pressure relief valve and the heat dissipation device of each device; compared with the prior art, the present invention collects the pressure, temperature and noise of each device through multiple collection units, and detects each device through the detection unit. Whether there is hydrogen leakage in the equipment is sent to the conversion unit, and the analog signal is converted into a digital signal through the conversion unit and input into the controller. The controller uploads the received digital signal to the liquid hydrogen refueling station monitoring system platform through the communication unit. According to the input digital signal, it is judged whether there is pressure abnormality, temperature abnormality, noise abnormality, or hydrogen leakage in each device, and the judgment result is fed back to the controller. According to the judgment result, the controller sends a control instruction to the alarm unit or the pressure relief valve and heat dissipation device of each device to control the alarm unit or the pressure relief valve and heat dissipation device to work or stop working, thereby realizing real-time and comprehensive monitoring and management of the overall operating status of hydrogen storage tanks, pumps, hydrogen refueling machines and other equipment in the hydrogen refueling station, thereby improving the safety of the liquid hydrogen refueling station.

[0042] Other beneficial effects of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 This is a principle block diagram of an embodiment of the present utility model;

[0044] Figure 2 This is a schematic diagram of the connection between the acquisition unit, feedback unit and various devices in an embodiment of the present utility model. DETAILED DESCRIPTION

[0045] To further clarify the technical problems, technical solutions, and advantages to be solved by the present invention, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments. It should be understood that the embodiments described are only a portion of the embodiments of the present invention, and not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0046] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0047] like Figure 1 As shown, an embodiment of the present utility model provides a liquid hydrogen refueling station safety monitoring system, the liquid hydrogen refueling station includes a cryogenic liquid hydrogen storage tank, a cryogenic liquid pump, an evaporator, a cascade high-pressure hydrogen storage tank, and a hydrogenator. The liquid hydrogen refueling station safety monitoring system includes:

[0048] Liquid hydrogen refueling station monitoring system platform;

[0049] The equipment terminal control system includes a communication unit, a controller, a conversion unit, an alarm unit, a plurality of collection units for collecting the tank pressure of the cryogenic liquid hydrogen storage tank, the tank temperature of the cryogenic liquid hydrogen storage tank, the noise of the cryogenic liquid pump, the tank pressure of the cascade high-pressure hydrogen storage tank, the tank temperature of the cascade high-pressure hydrogen storage tank, the pressure of the hydrogenator, and the temperature of the hydrogenator, and a plurality of detection units for detecting whether the hydrogen in the cryogenic liquid hydrogen storage tank is leaking, whether the hydrogen in the evaporator is leaking, whether the hydrogen in the cryogenic liquid pump is leaking, whether the hydrogen in the cascade liquid hydrogen storage tank is leaking, and whether the hydrogen in the hydrogenator is leaking;

[0050] The controller is connected to the liquid hydrogen station monitoring system platform through a communication unit. The output ends of all acquisition units and detection units are connected to the input end of the controller through a conversion unit. The first output end of the controller is connected to the input end of the alarm unit; the second output end of the controller is respectively connected to the control end of the pressure relief valve in the cryogenic liquid hydrogen storage tank, the control end of the heat dissipation device in the cryogenic liquid hydrogen storage tank, the control end of the pressure relief valve in the cryogenic liquid pump, the control end of the heat dissipation system of the cryogenic liquid pump, the control end of the pressure relief valve in the cascade high-pressure hydrogen storage tank, the control end of the heat dissipation device in the cascade high-pressure hydrogen storage tank, the control end of the pressure relief valve in the hydrogenator, and the control end of the heat dissipation device of the hydrogenator.

[0051] The working principle of the embodiment of the utility model is as follows:

[0052] The pressure, temperature and noise of each device are collected by multiple acquisition units, and the detection unit detects whether there is hydrogen leakage in each device and sends it to the conversion unit. The conversion unit converts the analog signal into a digital signal and inputs it into the controller. The controller uploads the received digital signal to the liquid hydrogen refueling station monitoring system platform through the communication unit. According to the input digital signal, it is judged whether there is abnormal pressure, abnormal temperature, abnormal noise, or hydrogen leakage in each device, and the judgment result is fed back to the controller. According to the judgment result, the controller sends a control instruction to the alarm unit or the pressure relief valve and heat dissipation device of each device to control the alarm unit or the pressure relief valve and heat dissipation device to work or stop working, thereby realizing real-time and comprehensive monitoring of the overall operating status of hydrogen storage tanks, pumps, hydrogen refueling machines and other equipment in the hydrogen refueling station.

[0053] It should be noted that the controller can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), which have the functions of sending and receiving data / signals and issuing control instructions to functional units based on the data. The embodiment of the present invention does not involve improvements to its internal algorithms, so the process of how it sends and receives data / signals or issues control instructions or control signals to functional units based on the data will no longer be described in detail.

[0054] Specifically, if Figure 2 As shown, the acquisition unit includes:

[0055] A pressure collection subunit for collecting the internal pressure of the cryogenic liquid hydrogen storage tank, the internal pressure of the cascade high-pressure hydrogen storage tank, and the pressure of the hydrogenator;

[0056] A temperature collection subunit for collecting the internal temperature of the low-temperature liquid hydrogen storage tank, the internal temperature of the cascade high-pressure hydrogen storage tank, and the temperature of the hydrogenator;

[0057] A noise collection subunit for collecting noise from a cryogenic liquid pump;

[0058] The output end of the pressure acquisition subunit, the output end of the temperature acquisition subunit, and the output end of the noise acquisition subunit are all connected to the input end of the controller through the conversion unit.

[0059] In an embodiment of the present utility model, the pressure acquisition subunit includes pressure sensors installed inside the cryogenic liquid hydrogen storage tank, the cascade high-pressure hydrogen storage tank, and the hydrogenator, and a pressure gauge and a pressure measuring tube installed at the outlet of the hydrogen storage tank; the temperature acquisition subunit includes metal thermometers placed on the surface of the cryogenic liquid hydrogen storage tank, the cascade high-pressure hydrogen storage tank, and the hydrogenator, and non-contact temperature sensors arranged on the outside of the cryogenic liquid hydrogen storage tank, the cascade high-pressure hydrogen storage tank, and the hydrogenator; the noise acquisition subunit is a noise detector and an acoustic measuring instrument installed in the factory building near the cryogenic liquid pump.

[0060] Specifically, if Figure 2 As shown, the detection unit includes:

[0061] a first detection unit for detecting whether hydrogen in a cryogenic liquid hydrogen storage tank is leaking;

[0062] A second detection unit for detecting whether hydrogen in the cascade high-pressure hydrogen storage tank is leaking;

[0063] a third detection unit for detecting whether hydrogen in the evaporator is leaking;

[0064] a fourth detection unit for detecting whether hydrogen in the hydrogen refueling machine is leaking;

[0065] a fifth detection unit for detecting whether hydrogen in the cryogenic liquid pump is leaking;

[0066] The output end of the first detection unit, the output end of the second detection unit, the output end of the third detection unit, the output end of the fourth detection unit, and the output end of the fifth detection unit are all connected to the input end of the controller through the conversion unit.

[0067] In an embodiment of the present utility model, the first detection unit, the second detection unit, the third detection unit, the fourth detection unit, and the fifth detection unit are all industrial gas leak detectors and online acoustic imagers. The industrial gas leak detectors are used to detect hydrogen leakage, and the online acoustic imagers are set around the hydrogen storage tank to determine whether there is a leakage based on the changes in the sound of the gas in the hydrogen storage tank.

[0068] Specifically, the liquid hydrogen refueling station safety monitoring system also includes a power supply unit;

[0069] The input terminal of the power supply unit is connected to the mains terminal for receiving the mains power;

[0070] The output end of the power supply unit is respectively connected to the power supply end of the controller, the power supply end of the conversion unit, the power supply end of the communication unit, and the power supply end of the alarm unit, and is used to provide power for the controller, the conversion unit, the communication unit, and the alarm unit.

[0071] In an embodiment of the present invention, the power supply unit may be composed of an overvoltage protection circuit, an overcurrent protection circuit, a voltage reduction circuit, and a voltage stabilization circuit to provide a stable power supply voltage for subsequent functional modules.

[0072] Specifically, the communication unit includes a wireless communication subunit and a wired communication subunit;

[0073] The data transmission end of the controller is connected to the liquid hydrogen refueling station monitoring system platform through a wireless communication subunit or a wired communication subunit.

[0074] In an embodiment of the present invention, the wireless communication subunit can adopt a wireless WIFI communication unit or a 4G communication module to realize wireless communication with the liquid hydrogen refueling station detection system platform, and the wired communication subunit can adopt an Ethernet communication unit or a USB communication unit to realize wired communication with the liquid hydrogen refueling station detection system platform.

[0075] Specifically, the liquid hydrogen refueling station safety monitoring system includes a storage unit;

[0076] The data transmission end of the storage unit is connected to the data transmission end of the liquid hydrogen refueling station monitoring system platform.

[0077] In an embodiment of the present invention, the storage unit can be an external storage device, such as a plug-in hard disk, a smart memory card (SMC, Smart Media Card), a secure digital (SD, Secure Digital) card, a flash card (Flash Card), etc., or it can be an internal storage unit for storing input or to-be-output data.

[0078] Specifically, the liquid hydrogen refueling station safety monitoring system also includes a data encryption unit;

[0079] The data transmission end of the data encryption unit is connected to the data transmission end of the liquid hydrogen refueling station monitoring system platform, and the data transmission end of the data encryption unit is connected to the data transmission end of the storage unit.

[0080] In an embodiment of the present invention, the data encryption unit is a data encryptor, which encrypts the data input into the liquid hydrogen refueling station safety monitoring system through the function of the data encryptor itself to achieve privacy protection.

[0081] Specifically, the liquid hydrogen refueling station safety monitoring system also includes a feedback unit;

[0082] The input end of the feedback unit is connected to the second output end of the controller;

[0083] The output end of the feedback unit is respectively connected to the control end of the pressure relief valve in the cryogenic liquid hydrogen storage tank, the control end of the heat dissipation device in the cryogenic liquid hydrogen storage tank, the control end of the pressure relief valve in the cryogenic liquid pump, the control end of the heat dissipation system of the cryogenic liquid pump, the control end of the pressure relief valve in the cascade high-pressure hydrogen storage tank, the control end of the heat dissipation device in the cascade high-pressure hydrogen storage tank, the control end of the pressure relief valve in the hydrogenator, and the control end of the heat dissipation device of the hydrogenator.

[0084] In an embodiment of the present invention, the feedback unit is equivalent to the switch of the pressure relief valve and the heat dissipation device. When the liquid hydrogen refueling station monitoring system platform determines that the pressure is abnormal, the controller sends a control instruction to control the feedback unit to open the pressure relief valve and start pressure relief until the pressure abnormality disappears. The controller sends a control instruction to control the feedback unit to close, thereby stopping the pressure relief; when the liquid hydrogen refueling station monitoring system platform determines that the temperature is abnormal, the controller sends a control instruction to control the feedback unit to open the heat dissipation device until the temperature abnormality disappears. The controller sends a control instruction to control the feedback unit to close, thereby stopping heat dissipation.

[0085] Specifically, the alarm unit includes:

[0086] Voice prompter and warning light;

[0087] The control end of the voice prompter and the control end of the alarm light are both connected to the first output end of the controller.

[0088] In an embodiment of the present invention, when the liquid hydrogen refueling station monitoring system platform determines that there is a hydrogen leak, the controller sends a control instruction to control the voice prompter to issue a voice broadcast and the alarm light to emit an audio and light signal to prompt the staff to take emergency measures in time.

[0089] It should be noted that the liquid hydrogen refueling station monitoring system platform can be a mobile device or a computer, which itself has the functions of data comparison calculation and data visualization. The embodiment of the present utility model does not involve improvements to its internal algorithm process, so its specific calculation process will not be repeated one by one in the embodiment of the present utility model.

[0090] The liquid hydrogen refueling station safety monitoring system provided by the embodiment of the present invention includes a liquid hydrogen refueling station monitoring system platform; an equipment terminal control system, including a communication unit, a controller, a conversion unit, an alarm unit, multiple collection units, and multiple detection units; the controller is connected to the liquid hydrogen refueling station monitoring system platform through the communication unit, and the output ends of all collection units and the output ends of the detection units are connected to the input end of the controller through the conversion unit, and the first output end of the controller is connected to the input end of the alarm unit; the second output end of the controller is respectively connected to the control end of the pressure relief valve and the heat dissipation device of each device; compared with the prior art, the embodiment of the present invention collects the pressure, temperature and noise of each device through the detection unit through multiple collection units. The detection of whether there is hydrogen leakage in each device is sent to the conversion unit, and the analog signal is converted into a digital signal through the conversion unit and input into the controller. The controller uploads the received digital signal to the liquid hydrogen refueling station monitoring system platform through the communication unit. According to the input digital signal, it is judged whether there is pressure abnormality, temperature abnormality, noise abnormality, or hydrogen leakage in each device, and the judgment result is fed back to the controller. According to the judgment result, the controller sends a control instruction to the alarm unit or the pressure relief valve and heat dissipation device of each device to control the alarm unit or the pressure relief valve and heat dissipation device to work or stop working, so as to realize real-time and comprehensive monitoring and management of the overall operating status of hydrogen storage tanks, pumps, hydrogen refueling machines and other equipment in the hydrogen refueling station, thereby improving the safety of the liquid hydrogen refueling station.

[0091] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles described in the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A liquid hydrogen refueling station safety monitoring system, the liquid hydrogen refueling station includes a cryogenic liquid hydrogen storage tank, a cryogenic liquid pump, an evaporator, a cascade high-pressure hydrogen storage tank, and a hydrogenator, characterized in that: The liquid hydrogen refueling station safety monitoring system includes: Liquid hydrogen refueling station monitoring system platform; The equipment terminal control system includes a communication unit, a controller, a conversion unit, an alarm unit, a plurality of collection units for collecting the tank pressure of the cryogenic liquid hydrogen storage tank, the tank temperature of the cryogenic liquid hydrogen storage tank, the noise of the cryogenic liquid pump, the tank pressure of the cascade high-pressure hydrogen storage tank, the tank temperature of the cascade high-pressure hydrogen storage tank, the pressure of the hydrogenator, and the temperature of the hydrogenator, and a plurality of detection units for detecting whether the hydrogen in the cryogenic liquid hydrogen storage tank is leaking, whether the hydrogen in the evaporator is leaking, whether the hydrogen in the cryogenic liquid pump is leaking, whether the hydrogen in the cascade liquid hydrogen storage tank is leaking, and whether the hydrogen in the hydrogenator is leaking; The controller is connected to the liquid hydrogen station monitoring system platform through the communication unit, and the output ends of all acquisition units and the output ends of the detection unit are connected to the input end of the controller through the conversion unit, and the first output end of the controller is connected to the input end of the alarm unit; the second output end of the controller is respectively connected to the control end of the pressure relief valve in the low-temperature liquid hydrogen storage tank, the control end of the heat dissipation device in the low-temperature liquid hydrogen storage tank, the control end of the pressure relief valve in the low-temperature liquid pump, the control end of the heat dissipation system of the low-temperature liquid pump, the control end of the pressure relief valve in the cascade high-pressure hydrogen storage tank, the control end of the heat dissipation device in the cascade high-pressure hydrogen storage tank, the control end of the pressure relief valve in the hydrogenator, and the control end of the heat dissipation device of the hydrogenator.

2. The liquid hydrogen refueling station safety monitoring system according to claim 1, characterized in that: The acquisition unit includes: A pressure collection subunit for collecting the pressure inside the cryogenic liquid hydrogen storage tank, the pressure inside the cascade high-pressure hydrogen storage tank, and the pressure of the hydrogenator; A temperature collection subunit for collecting the temperature inside the low-temperature liquid hydrogen storage tank, the temperature inside the cascade high-pressure hydrogen storage tank, and the temperature of the hydrogenator; a noise collection subunit for collecting noise from the cryogenic liquid pump; The output end of the pressure acquisition subunit, the output end of the temperature acquisition subunit, and the output end of the noise acquisition subunit are all connected to the input end of the controller through the conversion unit.

3. The liquid hydrogen refueling station safety monitoring system according to claim 2, characterized in that: The detection unit comprises: a first detection unit for detecting whether hydrogen in the cryogenic liquid hydrogen storage tank is leaking; a second detection unit for detecting whether hydrogen in the cascade high-pressure hydrogen storage tank is leaking; a third detection unit for detecting whether hydrogen in the evaporator is leaking; a fourth detection unit for detecting whether hydrogen in the hydrogen refueling machine is leaking; a fifth detection unit for detecting whether hydrogen in the cryogenic liquid pump is leaking; The output end of the first detection unit, the output end of the second detection unit, the output end of the third detection unit, the output end of the fourth detection unit, and the output end of the fifth detection unit are all connected to the input end of the controller through the conversion unit.

4. The liquid hydrogen refueling station safety monitoring system according to claim 3, characterized in that: The liquid hydrogen refueling station safety monitoring system also includes a power supply unit; The input end of the power supply unit is connected to the mains power end; The output end of the power supply unit is respectively connected to the power supply end of the controller, the power supply end of the conversion unit, the power supply end of the communication unit, and the power supply end of the alarm unit.

5. The liquid hydrogen refueling station safety monitoring system according to claim 4, characterized in that: The communication unit includes a wireless communication subunit and a wired communication subunit; The data transmission end of the controller is connected to the liquid hydrogen refueling station monitoring system platform through the wireless communication subunit or the wired communication subunit.

6. The liquid hydrogen refueling station safety monitoring system according to claim 5, characterized in that: The liquid hydrogen refueling station safety monitoring system includes a storage unit; The data transmission end of the storage unit is connected to the data transmission end of the liquid hydrogen refueling station monitoring system platform.

7. The liquid hydrogen refueling station safety monitoring system according to claim 6, characterized in that: The liquid hydrogen refueling station safety monitoring system also includes a data encryption unit; The data transmission end of the data encryption unit is connected to the data transmission end of the liquid hydrogen refueling station monitoring system platform, and the data transmission end of the data encryption unit is connected to the data transmission end of the storage unit.

8. The liquid hydrogen refueling station safety monitoring system according to claim 7, characterized in that: The liquid hydrogen refueling station safety monitoring system further includes a feedback unit; The input end of the feedback unit is connected to the second output end of the controller; The output end of the feedback unit is respectively connected to the control end of the pressure relief valve in the cryogenic liquid hydrogen storage tank, the control end of the heat dissipation device in the cryogenic liquid hydrogen storage tank, the control end of the pressure relief valve in the cryogenic liquid pump, the control end of the heat dissipation system of the cryogenic liquid pump, the control end of the pressure relief valve in the cascade high-pressure hydrogen storage tank, the control end of the heat dissipation device in the cascade high-pressure hydrogen storage tank, the control end of the pressure relief valve in the hydrogenator, and the control end of the heat dissipation device of the hydrogenator.

9. The liquid hydrogen refueling station safety monitoring system according to claim 8, characterized in that: The alarm unit includes: Voice prompter and warning light; The control end of the voice prompter and the control end of the alarm light are both connected to the first output end of the controller.

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