70MPa detection system of hydrogenation machine

Abstract

A 70MPa detection system of a hydrogen adding machine belongs to the technical field of hydrogen adding machine detection and comprises a 70MPa calibrating device, the 70MPa calibrating device is provided with a gas inlet used for being connected with the hydrogen adding machine and a gas outlet used for being connected with a vehicle compressed hydrogen gas cylinder, the gas inlet is provided with an infrared emission module, the gas outlet is provided with an infrared interface, and the infrared interface is connected with the 70 MPa calibrating device. The 70MPa calibrating device, the infrared emission module and the infrared interface are in communication connection with the computer through the explosion-proof junction box. The system is reasonable in design and easy and convenient to operate, skill requirements of operators are reduced, and personal errors are reduced. Meanwhile, the system also has high safety and stability, can stably operate in a high-pressure environment, and guarantees the safety of the verification process. In conclusion, the utility model provides an efficient, safe and automatic solution for the verification of the compressed hydrogen hydrogenation machine.

Description

Technical Field

[0001] This utility model belongs to the field of hydrogen refueling machine testing technology, specifically relating to a 70MPa testing system for a hydrogen refueling machine. Background Technology

[0002] The rapid development of the hydrogen fuel cell vehicle industry has placed higher demands on hydrogen refueling infrastructure, with the testing technology for 70MPa high-pressure hydrogen refueling machines facing significant technical bottlenecks. Traditional testing methods often employ mechanical pressure gauges combined with manual recording, resulting in low accuracy (generally exceeding ±1.5% FS) and slow response (each test takes over 30 minutes). Under high-pressure hydrogen conditions, conventional testing devices are at risk of seal failure; industry statistics over the past three years show that safety accidents caused by leaks in testing equipment account for 12.7%. Furthermore, existing systems lack real-time data acquisition capabilities, making it impossible to dynamically analyze key parameters such as pressure curves and flow rate changes during the hydrogen refueling process. The latest technical guidelines from the International Hydrogen Energy Association (IHA) indicate that traditional testing methods suffer from technical deficiencies such as lack of temperature compensation and significant vibration interference under 70MPa conditions, leading to flow rate measurement errors of up to 3.2%. As the driving range of hydrogen fuel cell vehicles exceeds 650 kilometers, the market demand for rapid refueling (5kg refueling within 3 minutes) testing has surged, and the time resolution of existing equipment (minimum 1 second / test) is no longer sufficient to meet the requirements for accurate testing. The industry urgently needs to develop a new type of testing system with explosion-proof certification, automatic compensation function and detection accuracy of ±0.5%. Utility Model Content

[0003] To address the shortcomings of existing technologies, a 70MPa testing system for a hydrogen refueling machine is provided, comprising a 70MPa calibration device. The 70MPa calibration device is equipped with an inlet for connecting to the hydrogen refueling machine and an outlet for connecting to a vehicle-mounted compressed hydrogen cylinder. An infrared emitting module is installed on the inlet, and an infrared interface is installed on the outlet. The 70MPa calibration device, the infrared emitting module, and the infrared interface are all connected to a computer via an explosion-proof junction box.

[0004] Furthermore, the 70MPa calibration device includes an inlet valve, a pressure transmitter, a mass flow meter, a pressure gauge, a vent valve, and an outlet valve. The inlet port is connected to the inlet valve of the 70MPa calibration device. The inlet valve, pressure transmitter, mass flow meter, and pressure gauge are connected in sequence. The pressure gauge is connected to the vent port through the vent valve and to the outlet port through the outlet valve. The pressure transmitter and mass flow meter are both connected to an explosion-proof junction box.

[0005] Furthermore, the air inlet is connected to the hydrogen refueling machine via a 70MPa nozzle, and the air outlet is connected to the vehicle-mounted compressed hydrogen cylinder via a 70MPa nozzle.

[0006] Furthermore, the explosion-proof junction box is wired to a computer via a communication interface.

[0007] Furthermore, the explosion-proof junction box is wirelessly connected to the computer via an antenna.

[0008] Furthermore, the explosion-proof junction box is connected to a power / charging interface.

[0009] The beneficial effects of this utility model are:

[0010] This testing system innovatively integrates multi-sensor fusion technology, improving detection accuracy to ±0.5% through triple data verification of pressure transmitters, mass flow meters, and infrared monitoring modules. The system adopts a modular IIC-class explosion-proof design, with core components developed in-house. The pipeline system has a maximum allowable working pressure of 96.25 MPa, ensuring a high safety factor. The calibration software features one-click operation, automatic data processing, and automatic report generation. The explosion-proof junction box integrates wireless communication, allowing data collected by the calibration device to be transmitted in real-time to an explosion-proof tablet computer. Operators can move freely, making the calibration process simple and convenient. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the 70MPa detection system for the compressed hydrogen refueling machine of this utility model.

[0012] 1. Air inlet, 2. Explosion-proof junction box, 3. Air inlet valve, 4. Pressure transmitter, 5. Mass flow meter, 6. Pressure gauge, 7. Vent valve, 8. Air outlet valve, 9. Air outlet, 10. Infrared interface, 11. Vent port, 13. Computer, 14. Power / charging interface, 15. 70MPa calibration device, 16. Communication interface, 17. Antenna. Detailed Implementation

[0013] A 70MPa detection system for a hydrogen refueling machine, such as Figure 1 As shown, it includes a 70MPa calibration device 15, which is equipped with an inlet 1 for connecting to a hydrogen refueling machine and an outlet 9 for connecting to a vehicle-mounted compressed hydrogen cylinder. An infrared emitting module is installed on the inlet 1, and an infrared interface 10 is installed on the outlet 9. The 70MPa calibration device 15, the infrared emitting module, and the infrared interface 10 are all connected to a computer 13 via an explosion-proof junction box 2.

[0014] The 70MPa calibration device 15 includes an inlet valve 3, a pressure transmitter 4, a mass flow meter 5, a pressure gauge 6, a vent valve 7, and an outlet valve 8. The inlet port 1 is connected to the inlet valve 3 of the 70MPa calibration device 15. The inlet valve 3, pressure transmitter 4, mass flow meter 5, and pressure gauge 6 are connected in sequence. The pressure gauge 6 is connected to the vent port 11 through the vent valve 7 and to the outlet port 9 through the outlet valve 8. The pressure transmitter 4 and the mass flow meter 5 are both connected to the explosion-proof junction box 2.

[0015] The air inlet 1 is connected to the hydrogen refueling machine via a 70MPa gun, and the air outlet 9 is connected to the vehicle-mounted compressed hydrogen cylinder via a 70MPa gun.

[0016] The explosion-proof junction box 2 is wired to the computer 13 via the communication interface 16.

[0017] The explosion-proof junction box 2 is wirelessly connected to the computer 13 via the antenna 17.

[0018] The explosion-proof junction box 2 is connected to the power / charging interface 14.

[0019] Workflow: Inlet 1 connects to the hydrogen dispenser via a 70MPa quick-connect nozzle → Inlet valve 3 controls the flow of the medium → Pressure transmitter 4 monitors the inlet pressure in real time → Mass flow meter 5 accurately measures the hydrogen mass flow rate → Pressure gauge 6 displays the pipeline pressure → Divides into two paths:

[0020] a) Safe pressure relief is achieved through vent valve 7 and vent port 11;

[0021] b) Connect the vehicle-mounted gas cylinder via the gas outlet valve 8 to the gas outlet 9.

[0022] All data throughout the process is transmitted to computer 13 for analysis and processing via explosion-proof junction box 2.

[0023] Component Function Description:

[0024] Inlet 1: High-pressure hydrogen flow inlet, equipped with a self-sealing connector;

[0025] Explosion-proof junction box 2: Intrinsically safe signal relay, protection level IP66;

[0026] Inlet valve 3: A switch that controls the entry of hydrogen into the 70MPa calibration device;

[0027] Pressure transmitter 4: 0-100MPa range, accuracy class 0.1; real-time monitoring and conversion of hydrogen pressure signal into electrical signal for computer processing.

[0028] Mass flow meter 5: Adopts Coriolis mass flow meter, Coriolis force principle, ±0.2% reading accuracy; accurately measures the flow rate of hydrogen passing through the calibration device.

[0029] Pressure gauge 6: Mechanical pointer-type backup display;

[0030] Vent valve 7: Used to release excess hydrogen or adjust system pressure;

[0031] Gas outlet valve 8: A switch that controls the flow of hydrogen gas from the outlet 9 of the calibration device;

[0032] Air outlet 9: Smart connector with infrared interface;

[0033] Infrared interface 10: Non-contact data transmission;

[0034] Vent 11: Silencer integrated design;

[0035] Computer 13: Runs dedicated calibration software to generate a test report;

[0036] Power interface 14: Provides power support for explosion-proof junction box 12 and the entire system;

[0037] Communication interface 16: The interface for wired communication between the explosion-proof junction box 12 and the computer 13;

[0038] Antenna 17: Antenna for wireless communication between the explosion-proof junction box 12 and the computer 9.

[0039] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A 70MPa detection system for a hydrogen refueling machine, characterized in that, It includes a 70MPa calibration device (15), which is equipped with an air inlet (1) for connecting to a hydrogen refueling machine and an air outlet (9) for connecting to a vehicle compressed hydrogen cylinder. An infrared emitting module is provided on the air inlet (1) and an infrared interface (10) is provided on the air outlet (9). The 70MPa calibration device (15), the infrared emitting module, and the infrared interface (10) are all connected to a computer (13) through an explosion-proof junction box (2).

2. The 70MPa detection system for hydrogen filling machines according to claim 1, characterized in that, The 70MPa calibration device (15) includes an inlet valve (3), a pressure transmitter (4), a mass flow meter (5), a pressure gauge (6), a vent valve (7), and an outlet valve (8). The inlet port (1) is connected to the inlet valve (3) of the 70MPa calibration device (15). The inlet valve (3), pressure transmitter (4), mass flow meter (5), and pressure gauge (6) are connected in sequence. The pressure gauge (6) is connected to the vent port (11) through the vent valve (7). The pressure gauge (6) is connected to the outlet port (9) through the outlet valve (8). The pressure transmitter (4) and mass flow meter (5) are both connected to the explosion-proof junction box (2).

3. The 70MPa detection system for hydrogen filling machines according to claim 1, characterized in that, The air inlet (1) is connected to the hydrogen refueling machine via a 70MPa gun, and the air outlet (9) is connected to the vehicle-mounted compressed hydrogen cylinder via a 70MPa gun.

4. The 70MPa detection system for hydrogen filling machines according to claim 1, characterized in that, The explosion-proof junction box (2) is wired to the computer (13) via the communication interface (16).

5. The 70MPa detection system for hydrogen filling machines according to claim 1, characterized in that, The explosion-proof junction box (2) is wirelessly connected to the computer (13) via an antenna (17).

6. The 70MPa detection system for hydrogen filling machines according to claim 1, characterized in that, The explosion-proof junction box (2) is connected to the power / charging interface (14).

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