A compressed hydrogen gas filling machine calibrating device with straight pipe structure

Abstract

A kind of compressed hydrogen gas dispenser verification device of straight pipe structure, belong to hydrogenation machine detection technical field, 35MPa hydrogenation inlet pipeline, 70MPa hydrogenation inlet pipeline, exhaust pipeline, pressure gauge collection pressure pipeline, 35MPa / 70MPa outlet interface pressure pipeline are arranged in casing, 35MPa hydrogenation inlet pipeline, 70MPa hydrogenation inlet pipeline are connected with the inlet end of mass flowmeter after being connected in parallel by pipeline, pressure transmitter is arranged on pipeline, the vent of mass flowmeter is connected with exhaust pipeline, 35MPa exhaust interface, diffusion interface by pipeline through four-way, the outlet end of mass flowmeter is connected with pressure gauge by pressure gauge collection pressure pipeline, outlet end is connected with 35MPa / 70MPa outlet interface by 35MPa / 70MPa outlet interface pressure pipeline, 35MPa / 70MPa outlet interface pressure pipeline is connected with exhaust pipeline in parallel by third three-way.The device of the utility model is simple in structure, easy to install and use and safe and reliable, compatible detection 35MPa and 70MPa two pressure grades hydrogenation machine, ensure the safety of compressed hydrogen gas dispenser verification device long-term use.

Description

Technical Field

[0001] This utility model belongs to the field of hydrogen refueling machine testing technology, specifically relating to a straight-tube structure compression hydrogen refueling machine calibration device. Background Technology

[0002] Compressed hydrogen refueling machines serve as crucial measuring instruments and the basis for hydrogen trade settlement in the refueling sector. Their long-term operational stability, safety, and measurement accuracy are of paramount importance. With the national promotion and application of fuel cell vehicles, ensuring the measurement accuracy of compressed hydrogen refueling machines is essential to protecting the basic rights of ordinary consumers. Therefore, it is necessary to develop a standard meter-based calibration device for compressed hydrogen refueling machines to promote the commercial operation and technological advancement of the entire hydrogen refueling machine industry.

[0003] Existing hydrogen dispensers on the market have two rated operating pressure levels: 35MPa and 70MPa. Currently developed calibration devices for compressed hydrogen dispensers can only test one of these pressure levels; that is, testing 35MPa is one type of calibration device, and testing 70MPa is another. For example, prior art CN215639693 discloses a metrological calibration device for a hydrogen dispenser, including: a hydrogen storage cylinder with an inlet and an outlet at both ends. The inlet is connected to the hydrogen dispensing nozzle of the dispenser under test via a filling pipeline, and the outlet is connected to an outlet pipeline; a weighing device for weighing the mass of hydrogen injected into the storage cylinder to obtain measurement data; and a data acquisition and processor connected to the weighing device to acquire measurement data and analyze and compare it with the display data of the dispenser under test. Therefore, it cannot achieve multi-pressure level calibration of compressed hydrogen dispensers.

[0004] Moreover, there are hydrogenation testing devices on the market that use a pipe bending process. The pipe bending process can easily cause potential cracks and stresses during the high-pressure pipe forming process, which poses a safety hazard in the long term. Utility Model Content

[0005] To address the shortcomings of existing technologies, a straight-pipe structure compression hydrogen dispenser calibration device is provided, comprising a housing. Inside the housing are a 35MPa hydrogen inlet pipeline, a 70MPa hydrogen inlet pipeline, an exhaust pipeline, a pressure gauge acquisition pipeline, and a 35MPa / 70MPa exhaust port pressure pipeline. The 35MPa and 70MPa hydrogen inlet pipelines are connected in parallel and then connected to the inlet end of a mass flow meter via a pipeline. A pressure transmitter is installed on the pipeline. The vent of the mass flow meter is connected to the exhaust pipeline, the 35MPa exhaust port, and a venting port via a pipeline and a four-way connector. The exhaust end of the mass flow meter is connected to a pressure gauge via the pressure gauge acquisition pipeline, and the exhaust end is connected to a 35MPa / 70MPa exhaust port pressure pipeline via the 35MPa / 70MPa exhaust port pressure pipeline. The 35MPa / 70MPa exhaust port pressure pipeline is connected in parallel to the exhaust pipeline via a third three-way connector.

[0006] Furthermore, the 35MPa hydrogen inlet pipeline includes a 35MPa hydrogen inlet, which is connected to the first valve of the first tee via a pipeline, and valve A is installed on the pipeline.

[0007] Furthermore, the 70MPa hydrogen inlet pipeline includes a 70MPa hydrogen inlet, which is connected to the second port of the first tee via a pipeline. A B valve is installed on the pipeline. The third port of the first tee is connected to the inlet end of the mass flow meter via a pipeline. A pressure transmitter is installed on the pipeline.

[0008] Furthermore, a D valve is installed on the 35MPa / 70MPa outlet pressure pipeline.

[0009] Furthermore, a C valve is installed on the exhaust pipe.

[0010] Furthermore, the pressure gauge's pressure acquisition pipeline is connected in parallel to the 35MPa / 70MPa outlet pressure pipeline via a second tee, and the second tee is connected to the 35MPa / 70MPa outlet pressure pipeline via an angle ferrule.

[0011] Furthermore, the 35MPa hydrogen inlet pipeline, the 70MPa hydrogen inlet pipeline, the exhaust pipeline, the pressure gauge pressure acquisition pipeline, and the 35MPa / 70MPa outlet pressure pipeline are connected by straight pipes and angle fittings.

[0012] Furthermore, an infrared emitting module is provided on the 70MPa hydrogen filling port.

[0013] Furthermore, an infrared interface is provided on the 35MPa / 70MPa air outlet.

[0014] Furthermore, a controller is installed inside the housing, and the housing is equipped with a communication interface, a power / charging interface, a switch, an antenna, and indicator lights, all of which are connected to the controller. The controller is connected to an infrared emitting module, an infrared interface, and a pressure transmitter.

[0015] The beneficial effects of this utility model are:

[0016] This invention provides a straight-pipe structure calibration device for compressed hydrogen dispensers, including 35MPa and 70MPa hydrogen filling ports, a mass flow meter, a pressure transmitter, and a pressure gauge. The 35MPa and 70MPa hydrogen filling ports are connected to the inlet of the mass flow meter via valves. The outlet of the mass flow meter is connected to the outlet of the 35MPa / 70MPa outlet via a valve, and also connected to a vent via a valve. The inlet of the mass flow meter is connected to a pressure transmitter, and the outlet is connected to a pressure gauge. The 35MPa exhaust port is connected to the vent. This device has a simple structure, is easy to install and use, and is safe and reliable. It is compatible with testing hydrogen dispensers with pressure ratings of 35MPa and 70MPa. This invention ensures the long-term safety of the compressed hydrogen dispenser calibration device. All internal pressure-bearing pipelines are straight pipes, and all pipe bends are connected using angle ferrules, tees, and crosses. Attached Figure Description

[0017] Figure 1 This is the external interface of the straight-tube structure compressed hydrogen dispenser calibration device of this utility model. Figure 1 ;

[0018] Figure 2 This is the external interface of the straight-tube structure compressed hydrogen dispenser calibration device of this utility model. Figure 2 ;

[0019] Figure 3 This is a diagram showing the internal piping connection of the straight-pipe structure compressed hydrogen dispenser calibration device of this utility model.

[0020] The attached figures are labeled as follows:

[0021] 1. 35MPa hydrogen filling port, 2. 70MPa hydrogen filling port, 3. Infrared emitting module, 4. Valve A, 5. Valve B, 6. Pressure transmitter, 7. Mass flow meter, 8. Pressure gauge, 9. Valve C, 10. Valve D, 11. Infrared interface, 12. 35MPa / 70MPa exhaust port, 13. 35MPa exhaust port, 14. Vent port, 15. Housing, 16. Communication interface, 17. Power / charging interface, 18. Switch, 19. Antenna, 20. Indicator light, 21. Straight pipe, 22. Angle port, 23. Second tee, 24. Four-way, 25. First tee, 26. Third tee. Detailed Implementation

[0022] A calibration device for a compressed hydrogen dispenser with a straight pipe structure, such as Figures 1-3 As shown, the device includes a housing 15, within which are installed a 35MPa hydrogen inlet pipeline, a 70MPa hydrogen inlet pipeline, an exhaust pipeline, a pressure gauge acquisition pipeline, and a 35MPa / 70MPa exhaust port pressure pipeline. The 35MPa and 70MPa hydrogen inlet pipelines are connected in parallel and then connected to the inlet end of a mass flow meter 7 via a pipeline. A pressure transmitter 6 is installed on the pipeline. The vent of the mass flow meter 7 is connected to the exhaust pipeline, the 35MPa exhaust port 13, and the vent port 14 via a pipeline and a four-way connector 24. The outlet end of the mass flow meter 7 is connected to a pressure gauge 8 via a pressure gauge acquisition pipeline, and the outlet end is connected to a 35MPa / 70MPa exhaust port 12 via a 35MPa / 70MPa exhaust port pressure pipeline. The 35MPa / 70MPa exhaust port pressure pipeline is connected in parallel to the exhaust pipeline via a third three-way connector 26.

[0023] The 35MPa hydrogen inlet pipeline includes a 35MPa hydrogen inlet 1, which is connected to the first valve of the first tee 25 via a pipeline. Valve A 4 is installed on the pipeline.

[0024] The 70MPa hydrogen inlet pipeline includes a 70MPa hydrogen inlet 2, which is connected to the second port of the first tee 25 via a pipeline. A B valve 5 is installed on the pipeline. The third port of the first tee 25 is connected to the inlet end of the mass flow meter 7 via a pipeline. A pressure transmitter 6 is installed on the pipeline.

[0025] Among them, valve D10 is installed on the 35MPa / 70MPa outlet pressure pipeline.

[0026] Valve C9 is installed on the exhaust pipe.

[0027] The pressure gauge's pressure acquisition pipeline is connected in parallel to the 35MPa / 70MPa outlet pressure pipeline via a second tee 23, and the second tee 23 is connected to the 35MPa / 70MPa outlet pressure pipeline via an angle ferrule 22.

[0028] The 35MPa hydrogen inlet pipeline, 70MPa hydrogen inlet pipeline, exhaust pipeline, pressure gauge pressure acquisition pipeline, and 35MPa / 70MPa outlet pressure pipeline are connected by straight pipe 21 and angle pipe.

[0029] An infrared emitting module 3 is provided on the 70MPa hydrogen filling port 2.

[0030] An infrared interface 11 is provided on the 35MPa / 70MPa air outlet 12.

[0031] The housing 15 contains a controller, and the housing 15 is equipped with a communication interface 16, a power / charging interface 17, a switch 18, an antenna 19, and an indicator light 20, all of which are connected to the controller. The controller is also connected to an infrared transmitting module 3, an infrared interface 11, and a pressure transmitter 6.

[0032] like Figures 1-2 As shown, the chassis interfaces are described below:

[0033] Front panel interface design of the chassis:

[0034] The inlet housing 15 of the device is designed with a 35MPa hydrogen filling port 1 and a 70MPa hydrogen filling port 2, and the outlet housing 15 of the device is designed with a 35MPa / 70MPa exhaust port 12 and a 35MPa exhaust port 13.

[0035] An infrared interface 11 is designed at the 35MPa / 70MPa gas outlet 12, which is connected to the cable of the corresponding 70MPa hydrogen refueling gun. The device can monitor the pressure, temperature and other data of the vehicle-mounted gas cylinder. At the same time, an infrared emitting module 3 is designed at the 70MPa hydrogen refueling port 2, which is connected to the cable of the 70MPa hydrogen refueling gun equipped on the hydrogen refueling machine. The 70MPa hydrogen refueling gun is equipped with an infrared receiving module. The device transmits the monitored pressure data to the infrared receiving module through the infrared emitting module 3, that is, to the hydrogen refueling machine.

[0036] When operating at 35MPa pressure: the hydrogen refueling gun on the 35MPa hydrogen refueling machine is connected to hydrogen refueling port 1; the quick-connect end of the pipeline system equipped with the calibration device is connected to the 35MPa / 70MPa gas outlet port 12 and the 35MPa exhaust port 13; the hydrogen refueling gun end of the pipeline system equipped with the calibration device is connected to the vehicle interface.

[0037] When operating at 70MPa pressure: the hydrogen refueling gun on the 70MPa hydrogen refueling machine is connected to the hydrogen refueling port 2 and the infrared emitting module 3; the quick connector end of the pipeline system equipped with the calibration device is connected to the 35MPa / 70MPa gas outlet 12 and the infrared interface 11; the hydrogen refueling gun end of the pipeline system equipped with the calibration device is connected to the vehicle interface.

[0038] Back panel interface design:

[0039] Communication interface 16: Can be connected to a cable to communicate with a computer and display test process data;

[0040] Antenna 19: The device can be wirelessly connected to a computer to display test process data;

[0041] Power / charging port 17: can supply power and charge the device;

[0042] Switch 18: Power supply control for the device system;

[0043] Indicator light 20: Battery level indicator. Solid light: Battery level is normal. Flashing light: Battery level is low, please charge it in time.

[0044] like Figure 3 As shown, the internal piping connections are as follows:

[0045] All internal piping is connected via straight pipes and angle fittings;

[0046] On the pipeline corresponding to the 35MPa hydrogen filling port 1, valve A 4 is installed to control the opening and closing of the 35MPa hydrogen gas; on the pipeline corresponding to the 70MPa hydrogen filling port 2, valve B 5 is installed to control the opening and closing of the 70MPa hydrogen gas. Note: The 35MPa and 70MPa pressure levels will not be used simultaneously.

[0047] At the tee 25, a pressure transmitter 6 is installed on the pipeline to collect and transmit pressure; a mass flow meter 7 is installed on the downstream pipeline to detect and transmit flow.

[0048] At tee 23, a pressure gauge 8 is designed on the branch pipe to monitor the pipe pressure in real time;

[0049] At the tee 26, valve D branch 10 is connected to the 35MPa / 70MPa exhaust port 12, valve C branch 9 is connected to the four-way 24, and the four-way is connected to the 35MPa exhaust port 13 and the vent port 14.

[0050] 35MPa Hydrogen Filling Port 1: Connects to the hydrogen filling nozzle of a 35MPa hydrogen filler;

[0051] 70MPa Hydrogen Filling Port 2: Connects to the hydrogen filling nozzle of a 70MPa hydrogen filler;

[0052] Pressure transmitter 6: Collects the pressure in the pipeline and transmits it to the controller;

[0053] Pressure gauge 8: Displays pipeline pressure for easy and intuitive viewing;

[0054] 35MPa Exhaust Port 13: Connects to the 35MPa hydrogen refueling gun exhaust line, used for exhaust when the test is completed;

[0055] When in use, the venting port 14 can be connected to the venting pipeline at the hydrogen refueling station.

[0056] 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 calibration device for a compressed hydrogen dispenser with a straight pipe structure, characterized in that, The device includes a housing (15), within which are installed a 35MPa hydrogen inlet pipeline, a 70MPa hydrogen inlet pipeline, an exhaust pipeline, a pressure gauge acquisition pipeline, and a 35MPa / 70MPa outlet pressure pipeline. The 35MPa and 70MPa hydrogen inlet pipelines are connected in parallel and then connected to the inlet end of a mass flow meter (7) via a pipeline. A pressure transmitter (6) is installed on the pipeline, and the vent of the mass flow meter (7) is connected to the pipeline. The mass flow meter (7) is connected to the exhaust pipe, the 35MPa exhaust port (13), and the vent port (14) via a four-way connector (24). The outlet end of the mass flow meter (7) is connected to the pressure gauge (8) via a pressure gauge collection pipe. The outlet end is connected to the 35MPa / 70MPa outlet port (12) via a 35MPa / 70MPa outlet port pressure pipe. The 35MPa / 70MPa outlet port pressure pipe is connected to the exhaust pipe in parallel via a third three-way connector (26).

2. The straight-tube compressed hydrogen dispenser calibration device according to claim 1, characterized in that, The 35MPa hydrogen inlet pipeline includes a 35MPa hydrogen inlet (1), which is connected to the first port of the first tee (25) via a pipeline, and valve A (4) is installed on the pipeline.

3. The calibration device for a straight-tube compressed hydrogen dispenser according to claim 1, characterized in that, The 70MPa hydrogen inlet pipeline includes a 70MPa hydrogen inlet (2), which is connected to the second port of the first tee (25) via a pipeline. A B valve (5) is installed on the pipeline. The third port of the first tee (25) is connected to the inlet of the mass flow meter (7) via a pipeline. A pressure transmitter (6) is installed on the pipeline.

4. The calibration device for a straight-tube compressed hydrogen dispenser according to claim 1, characterized in that, A D valve (10) is installed on the 35MPa / 70MPa outlet pressure pipeline.

5. The calibration device for a straight-tube compressed hydrogen dispenser according to claim 1, characterized in that, A C valve (9) is installed on the exhaust pipe.

6. The calibration device for a straight-tube compressed hydrogen dispenser according to claim 1, characterized in that, The pressure gauge's pressure acquisition pipeline is connected in parallel to the 35MPa / 70MPa outlet pressure pipeline via the second tee (23), and the second tee (23) is connected to the 35MPa / 70MPa outlet pressure pipeline via the angle ferrule (22).

7. The calibration device for a straight-tube compressed hydrogen dispenser according to claim 1, characterized in that, The 35MPa hydrogen inlet pipeline, 70MPa hydrogen inlet pipeline, exhaust pipeline, pressure gauge pressure acquisition pipeline, and 35MPa / 70MPa outlet pressure pipeline are connected by a straight pipe (21) and an angle pipe.

8. The straight-tube compressed hydrogen dispenser calibration device according to claim 3, characterized in that, An infrared emitting module (3) is provided on the 70MPa hydrogen filling port (2).

9. The calibration device for a straight-tube compressed hydrogen dispenser according to claim 1, characterized in that, An infrared interface (11) is provided on the 35MPa / 70MPa air outlet (12).

10. The calibration device for a straight-tube compressed hydrogen dispenser according to claim 1, characterized in that, The controller is installed inside the housing (15). The housing (15) is equipped with a communication interface (16), a power / charging interface (17), a switch (18), an antenna (19), and an indicator light (20), all of which are connected to the controller. The controller is connected to the infrared emitting module (3), the infrared interface (11), and the pressure transmitter (6).

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