High-flow conveying equipment for hydrogen

Abstract

The utility model relates to the technical field of hydrogen conveying, and discloses a hydrogen conveying device which is used for large-flow hydrogen conveying equipment, a nitrogen purging system, a high-pressure decompression system, a medium-pressure decompression system, a low-pressure decompression system, a remote / local pressure monitoring system, a gas leakage monitoring system and an emergency cut-off system and is reasonable in structural design, compact in arrangement and capable of saving occupied space. By means of mutual communication among a pneumatic valve, a pressure sensor, a filter, a pressure regulating valve, a hydrogen detector and a check valve, the automatic switching, automatic pressure relief, emergency stop, pressure alarm and leakage alarm can be achieved, meanwhile, large-flow and high-pressure hydrogen output can be met, and the safety of enterprises is improved. A large number of valves and pipelines are saved, the disc surface is simpler, and the situation that impurities exist in gas, backflow occurs, and normal gas supply is affected due to the fact that valves are damaged and not maintained in time can be prevented; and the manual valve is changed into the pneumatic valve, and the ball head sealing at the valve joint is changed into loose joint type surface sealing, so that the equipment can operate more safely and effectively.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen transportation, in particular to a large-flow hydrogen transportation device. Background Art

[0002] The transportation of hydrogen includes pipeline transportation. Hydrogen is transported through hydrogen transmission pipelines. This method can achieve a continuous and stable supply of hydrogen and requires the construction of special hydrogen pipelines.

[0003] After searching, the patent with application number CN202010167920.8 discloses a hydrogen delivery system for a hydrogen refueling vehicle, including a hydrogen delivery pipeline, a hydrogen delivery pressure regulating component and a control unit; the hydrogen delivery pressure regulating component is arranged on the hydrogen delivery pipeline, the hydrogen delivery pressure regulating component is connected to the control unit, and the hydrogen delivery pressure regulating component regulates the hydrogen delivery pressure in the hydrogen delivery pipeline behind the hydrogen delivery pressure regulating component according to the pressure curve set in the control unit. The solution is to solve the problem that in the existing hydrogenation process, due to the large pressure difference between the hydrogen storage tank in the hydrogen refueling machine and the on-board hydrogen storage bottle, the hydrogen flow in the hydrogen delivery pipeline is first large and then small, resulting in the possible defect that the on-board hydrogen storage bottle in the hydrogen refueling vehicle is prone to temperature exceeding the standard after hydrogen is filled, and the hydrogen flow in the hydrogen delivery pipeline becomes smaller as the pressure difference between the hydrogen storage tank in the hydrogen refueling machine and the on-board hydrogen storage bottle becomes smaller, which makes the hydrogen filling time in the hydrogen storage bottle in the hydrogen refueling vehicle long.

[0004] Current hydrogen delivery equipment has the following drawbacks:

[0005] 1. The gas delivery flow rate is low, with the maximum flow rate being only 300Nm 3 / h, the output pressure is low, the maximum pressure is only 2MPa;

[0006] 2. The equipment is all controlled by manual valves, which cannot realize automatic switching of gas supply, which is extremely inconvenient and wastes a lot of manpower and material resources;

[0007] 3. The low filtration accuracy of the equipment affects the gas quality of customers;

[0008] 4. The equipment cannot remotely monitor pressure and automatically release overpressure;

[0009] 5. Failure to install gas leak detection and linkage equipment for emergency gas shutdown;

[0010] 6. The joints are sealed with ball joints, which are prone to leakage and require complicated disassembly procedures. Therefore, we need to propose a device for large-flow hydrogen transportation. Utility Model Content

[0011] The purpose of the utility model is to provide a large-flow hydrogen transportation equipment, a nitrogen purge system, a high-pressure pressure reducing system, a medium-pressure pressure reducing system, a low-pressure pressure reducing system, a remote / local pressure monitoring system, a gas leakage monitoring system and an emergency shut-off system. The structural design is reasonable and the arrangement is compact, which saves space and reduces the land cost of the enterprise. The pneumatic valve, pressure sensor, filter, pressure regulating valve, hydrogen detector and check valve are interconnected to realize automatic switching, automatic pressure relief, emergency stop, pressure alarm and leakage alarm. At the same time, it can also meet the large-flow and high-pressure hydrogen output, save a large number of valves and pipelines to make the disk more simple, and can prevent the presence of impurities in the gas, backflow, and valve damage and untimely maintenance from affecting the normal gas supply; and the manual valve is changed to a pneumatic valve, and the ball head seal at the valve connection is changed to a flexible face seal, so that the equipment can operate more safely and effectively, so as to solve the problems raised in the above background technology.

[0012] To achieve the above objectives, the present invention provides the following technical solutions: a large-flow hydrogen delivery device, which delivers hydrogen through two gas pipelines, including a gas leakage monitoring system, a remote / local pressure monitoring system connected to one end of the two gas pipelines, and an emergency shut-off system, wherein the two gas pipelines are a user-side gas pipeline and a backup-side gas pipeline, respectively, the user-side gas pipeline is connected to the backup-side gas pipeline, and both the user-side gas pipeline and the backup-side gas pipeline include a nitrogen purge system, a high-pressure pressure reduction system, a medium-pressure pressure reduction system, and a low-pressure pressure reduction system;

[0013] The nitrogen purge system, high-pressure pressure reduction system, medium-pressure pressure reduction system, low-pressure pressure reduction system, remote / local pressure monitoring system, and emergency shut-off system are connected in sequence, and the gas leakage monitoring system is installed on the high-pressure pressure reduction system, medium-pressure pressure reduction system, and low-pressure pressure reduction system.

[0014] Preferably, the nitrogen purge system of the use-side gas pipeline includes a tubular trailer 1, one end of the tubular trailer 1 is connected to a pneumatic ball valve BV1L-T12, one end of the pneumatic ball valve BV1L-T12 is respectively connected to a check valve CV1L-V8 and a pressure regulating valve FL1L-T12, and one end of the check valve CV1L-V8 is connected to a diaphragm valve MV1L-V8 for high-pressure purging and replacement of nitrogen.

[0015] Preferably, the high-pressure pressure reducing system of the gas pipeline on the usage side includes a diaphragm valve MV1L-V4, a diaphragm valve MV2L-V4, and a diaphragm valve MV2L-V8 connected to the pressure regulating valve FL1L-T12, one end of the diaphragm valve MV1L-V4 is connected to a pressure sensor PT1L-V4 connected to the control host, one end of the diaphragm valve MV2L-V4 is connected to a flow sensor PG1L-V4, and one end of the diaphragm valve MV2L-V8 is connected to a check valve CV5W-V8.

[0016] Preferably, the medium-pressure pressure reducing system of the usage-side gas pipeline includes a diaphragm valve MV3L-V4, a diaphragm valve MV4L-V4, a diaphragm valve MV3L-V8, and a diaphragm valve MV5L-V8 connected to the usage-side gas pipeline, one end of the diaphragm valve MV5L-V8 is connected to a plug valve RV1L-F8, and the connecting end of the diaphragm valve MV3L-V8 and the plug valve RV1L-F8 is connected to a check valve CV6W-V8. The usage-side gas pipeline is also installed with a pneumatic ball valve BV2L-T12, a pneumatic valve AV1L-T12, and a constant flow valve REG1L-T12 located between the diaphragm valve MV2L-V8 and the diaphragm valve MV3L-V4.

[0017] Preferably, the low-pressure pressure reducing system of the usage-side gas pipeline includes a diaphragm valve MV5L-V4, a diaphragm valve MV6L-V4, a diaphragm valve MV4L-V8, and a diaphragm valve MV7L-V8 installed on the usage-side gas pipeline, one end of the diaphragm valve MV5L-V8 is connected to a plug valve RV2L-F8, and the connecting end of the diaphragm valve MV4L-V8 and the plug valve RV2L-F8 is connected to a check valve CV7W-V8. The usage-side gas pipeline is also installed with a check valve CV2L-T12, a pneumatic ball valve BV3L-T12, a pneumatic ball valve BV1L-T24, and a constant flow valve REG2L-T24 located between the diaphragm valve MV5L-V8 and the diaphragm valve MV5L-V4.

[0018] Preferably, the remote / local pressure monitoring system includes a diaphragm valve MV7W-V4, a pneumatic valve AV1W-V8, and a diaphragm valve MV6W-V8 connected to the low-pressure pressure reducing system, one end of the diaphragm valve MV7W-V4 is connected to a pressure sensor PT4W-V4 connected to the control host, the connecting end of the pneumatic valve AV1W-V8 and the diaphragm valve MV6W-V8 is connected to a check valve CV8W-V8, and the connecting ends of the check valve CV6W-V8, the check valve CV7W-V8 and the check valve CV8W-V8 are connected to a filter FA1W-T16.

[0019] Preferably, the gas supply pipeline on the use side is also installed with a pneumatic valve AV2L-T24, a check valve CV3L-T24, and a pneumatic ball valve BV2L-T24 located between the diaphragm valve MV7L-V8 and the diaphragm valve MV7W-V4. The pneumatic valve AV2L-T24 and the pneumatic valve AV1L-T12 are connected to conventional driving gas and emergency driving gas through two pipelines.

[0020] Preferably, the emergency shut-off system includes a check valve CV4W-T24 and a pneumatic ball valve BV3W-T24 connected to the low-pressure pressure reducing system, one end of the check valve CV4W-T24 is respectively connected to a diaphragm valve MV8W-V4 and a pneumatic ball valve BV2R-T24, and one end of the diaphragm valve MV8W-V4 is connected to a flow sensor PG4W-V4.

[0021] Preferably, the gas leakage monitoring system includes an audible and visual alarm, an emergency-driven nitrogen valve box connected to the interface of the audible and visual alarm, a reserved explosion-proof five-hole socket, and three hydrogen detectors, and the three hydrogen detectors are respectively installed on the high-pressure pressure reduction system, the medium-pressure pressure reduction system and the low-pressure pressure reduction system.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] The utility model discloses a nitrogen purge system, a high-pressure pressure reducing system, a medium-pressure pressure reducing system, a low-pressure pressure reducing system, a remote / local pressure monitoring system, a gas leakage monitoring system and an emergency shut-off system. The structural design is reasonable and the arrangement is compact, which saves floor space and reduces the land cost of the enterprise. The system is interconnected through the pneumatic valve, the pressure sensor, the filter, the pressure regulating valve, the hydrogen detector and the check valve, and can realize automatic switching, automatic pressure relief, emergency stop, pressure alarm and leakage alarm. At the same time, it can also meet the requirements of large-flow and high-pressure hydrogen output, saves a large number of valves and pipelines, makes the panel more simple, and can prevent the presence of impurities in the gas, backflow, and the damage of valve parts that are not repaired in time from affecting the normal gas supply. The manual valve is changed to a pneumatic valve, and the ball head seal at the valve connection is changed to a flexible face seal, so that the equipment can operate more safely and efficiently. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a system block diagram of the utility model. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See also Figure 1The utility model provides a technical solution: a large-flow hydrogen transmission device, which realizes hydrogen transmission through two gas pipelines, including a gas leakage monitoring system, a remote / local pressure monitoring system and an emergency shut-off system connected to one end of the two gas pipelines, the two gas pipelines are respectively a use-side gas pipeline and a standby-side gas pipeline, the use-side gas pipeline is connected to the standby-side gas pipeline, and the use-side gas pipeline and the standby-side gas pipeline both include a nitrogen purge system, a high-pressure pressure reducing system, a medium-pressure pressure reducing system and a low-pressure pressure reducing system;

[0027] The equipment is controlled by PLC and uses a touch screen as the human-machine interface. Through the pressure sensors, pneumatic valves, hydrogen detectors and other devices installed on the equipment, the basic functions include automatic switching, pressure monitoring and automatic safety cut-off in emergency situations (when the set alarm signal is triggered), ensuring safe and efficient operation of the equipment.

[0028] This equipment can realize automatic switching of gas sources, remote / local gas pressure monitoring, remote control of valve start and stop, automatic safety cut-off in emergency, flow curve query, alarm history record query, etc., saving manpower and material resources and saving costs.

[0029] A PLC control system and pressure sensor have been added, the manual valve has been changed to a pneumatic valve, and the ball head seal at the valve connection has been changed to a joint face seal, making the equipment run safer and more efficient.

[0030] The nitrogen purge system, high-pressure pressure reduction system, medium-pressure pressure reduction system, low-pressure pressure reduction system, remote / local pressure monitoring system, and emergency shut-off system are connected in sequence, and the gas leakage monitoring system is installed on the high-pressure pressure reduction system, medium-pressure pressure reduction system, and low-pressure pressure reduction system.

[0031] The nitrogen purge system of the user-side gas pipeline includes a tubular trailer 1, one end of which is connected to a pneumatic ball valve BV1L-T12, one end of which is respectively connected to a check valve CV1L-V8 and a pressure regulating valve FL1L-T12, and one end of the check valve CV1L-V8 is connected to a diaphragm valve MV1L-V8 for high-pressure purging and replacement of nitrogen.

[0032] The high-pressure pressure reducing system of the gas pipeline on the user side includes a diaphragm valve MV1L-V4, a diaphragm valve MV2L-V4, and a diaphragm valve MV2L-V8 connected to the pressure regulating valve FL1L-T12. One end of the diaphragm valve MV1L-V4 is connected to a pressure sensor PT1L-V4 connected to the control host, one end of the diaphragm valve MV2L-V4 is connected to a flow sensor PG1L-V4, and one end of the diaphragm valve MV2L-V8 is connected to a check valve CV5W-V8.

[0033] The medium-pressure pressure reducing system of the gas pipeline on the user side includes a diaphragm valve MV3L-V4, a diaphragm valve MV4L-V4, a diaphragm valve MV3L-V8, and a diaphragm valve MV5L-V8 connected to the gas pipeline on the user side. One end of the diaphragm valve MV5L-V8 is connected to a plug valve RV1L-F8, and the connecting end of the diaphragm valve MV3L-V8 and the plug valve RV1L-F8 is connected to a check valve CV6W-V8. The gas pipeline on the user side is also equipped with a pneumatic ball valve BV2L-T12, a pneumatic valve AV1L-T12, and a constant flow valve REG1L-T12 located between the diaphragm valve MV2L-V8 and the diaphragm valve MV3L-V4.

[0034] The low-pressure pressure reducing system of the gas transmission pipeline on the user side includes a diaphragm valve MV5L-V4, a diaphragm valve MV6L-V4, a diaphragm valve MV4L-V8, and a diaphragm valve MV7L-V8 installed on the gas transmission pipeline on the user side. One end of the diaphragm valve MV5L-V8 is connected to a plug valve RV2L-F8, and the connecting end of the diaphragm valve MV4L-V8 and the plug valve RV2L-F8 is connected to a check valve CV7W-V8. The gas transmission pipeline on the user side is also installed with a check valve CV2L-T12, a pneumatic ball valve BV3L-T12, a pneumatic ball valve BV1L-T24, and a constant flow valve REG2L-T24 located between the diaphragm valve MV5L-V8 and the diaphragm valve MV5L-V4.

[0035] The remote / local pressure monitoring system includes a diaphragm valve MV7W-V4, a pneumatic valve AV1W-V8, and a diaphragm valve MV6W-V8 connected to the low-pressure pressure reducing system. One end of the diaphragm valve MV7W-V4 is connected to a pressure sensor PT4W-V4 connected to the control host. The connecting end of the pneumatic valve AV1W-V8 and the diaphragm valve MV6W-V8 is connected to a check valve CV8W-V8. The connecting ends of the check valve CV6W-V8, the check valve CV7W-V8 and the check valve CV8W-V8 are connected to a filter FA1W-T16.

[0036] The gas supply pipeline on the use side is also installed with a pneumatic valve AV2L-T24, a check valve CV3L-T24, and a pneumatic ball valve BV2L-T24 located between the diaphragm valve MV7L-V8 and the diaphragm valve MV7W-V4. The pneumatic valve AV2L-T24 and the pneumatic valve AV1L-T12 are connected to conventional driving gas and emergency driving gas through two pipelines.

[0037] The emergency shut-off system includes a check valve CV4W-T24 and a pneumatic ball valve BV3W-T24 connected to the low-pressure pressure reducing system. One end of the check valve CV4W-T24 is respectively connected to a diaphragm valve MV8W-V4 and a pneumatic ball valve BV2R-T24. One end of the diaphragm valve MV8W-V4 is connected to a flow sensor PG4W-V4.

[0038] The gas leakage monitoring system includes an audible and visual alarm, an emergency-driven nitrogen valve box connected to the audible and visual alarm interface, a reserved explosion-proof five-hole socket, and three hydrogen detectors. The three hydrogen detectors are respectively installed on the high-pressure pressure reduction system, the medium-pressure pressure reduction system, and the low-pressure pressure reduction system.

[0039] The nitrogen purge system of the standby side gas pipeline includes a tubular trailer 2, one end of which is connected to a pneumatic ball valve BV1R-T12, one end of which is respectively connected to a check valve CV1R-V8 and a pressure regulating valve FL1R-T12, and one end of the check valve CV1R-V8 is connected to a diaphragm valve MV1R-V8 for high-pressure purging and replacement of nitrogen.

[0040] The high-pressure pressure reducing system of the standby side gas pipeline includes a diaphragm valve MV1R-V4, a diaphragm valve MV2R-V4, and a diaphragm valve MV2R-V8 connected to the pressure regulating valve FL1R-T12. One end of the diaphragm valve MV1R-V4 is connected to a pressure sensor PT1R-V4 connected to the control host, one end of the diaphragm valve MV2R-V4 is connected to a flow sensor PG1R-V4, and one end of the diaphragm valve MV2R-V8 is connected to the vent main.

[0041] The medium-pressure pressure reducing system of the standby side gas pipeline includes a diaphragm valve MV3R-V4, a diaphragm valve MV4R-V4, a diaphragm valve MV3R-V8, and a diaphragm valve MV5R-V8 connected to the standby side gas pipeline. One end of the diaphragm valve MV5R-V8 is connected to a plug valve RV1R-F8. The connecting ends of the diaphragm valve MV3R-V8 and the plug valve RV1R-F8 are connected to the vent main pipe. The standby side gas pipeline is also installed with a pneumatic ball valve BV2R-T12, a pneumatic valve AV1R-T12, and a constant flow valve REG1R-T12 located between the diaphragm valve MV2R-V8 and the diaphragm valve MV3R-V4.

[0042] A normally closed pneumatic ball valve BV4W-T12 is connected between the pneumatic ball valve BV2R-T12 and the pneumatic ball valve BV2L-T12.

[0043] The low-pressure pressure reducing system of the standby side gas pipeline includes a diaphragm valve MV5R-V4, a diaphragm valve MV6R-V4, a diaphragm valve MV4R-V8, and a diaphragm valve MV7R-V8 installed on the standby side gas pipeline. One end of the diaphragm valve MV5R-V8 is connected to a plug valve RV2R-F8, and the connecting ends of the diaphragm valve MV4R-V8 and the plug valve RV2R-F8 are connected to the vent main pipe. The standby side gas pipeline also includes a check valve CV2R-T12, a pneumatic ball valve BV3R-T12, a pneumatic ball valve BV1R-T24, and a constant flow valve REG2R-T24 located between the diaphragm valve MV5R-V8 and the diaphragm valve MV5R-V4.

[0044] A normally open pneumatic ball valve BV5W-T12 is connected between the connecting ends of the pneumatic ball valve BV3R-T12 and the pneumatic ball valve BV1R-T24 and between the connecting ends of the pneumatic ball valve BV3L-T12 and the pneumatic ball valve BV1L-T24.

[0045] The backup-side gas pipeline also includes a pneumatic valve AV2R-T24, a check valve CV3R-T24, and a pneumatic ball valve BV2R-T24, located between the diaphragm valve MV7R-V8 and the diaphragm valve MV7W-V4. Both the pneumatic valve AV2R-T24 and the pneumatic valve AV1R-T12 are connected to both regular and emergency drive gas lines via two pipelines.

[0046] When in use, when the air source pressure on the use side is lower than the set value, the PLC system automatically closes the pneumatic ball valve on the use side and opens the pneumatic ball valve on the standby side, and at the same time activates the sound and light alarm to prompt the pressure abnormality;

[0047] When the outlet pressure of the first-stage pressure regulating valve on the user side is lower or higher than the set value, the PLC system automatically closes the pneumatic ball valve on the user side and opens the pneumatic ball valve on the standby side, and at the same time activates the sound and light alarm to indicate the pressure abnormality;

[0048] When the outlet pressure of the secondary pressure regulating valve on the user side is lower or higher than the set value, the PLC system automatically closes the pneumatic ball valve on the user side and opens the pneumatic ball valve on the standby side, and at the same time activates the sound and light alarm to indicate the pressure abnormality;

[0049] When the outlet pressure of the secondary pressure regulating valve and the main pipeline pressure are higher than the set value, the PLC system automatically opens the main pressure relief pneumatic diaphragm valve to relieve pressure and keep the main pipeline output pressure stable, with a pressure fluctuation value of ≤0.3Bar;

[0050] When two hydrogen detectors simultaneously detect that the gas leakage concentration reaches the low-low alarm setting value (20% LEL), the sound and light alarm will be activated to prompt the staff to eliminate the leakage source. When the concentration reaches the high-high alarm value (50% LEL), the PLC system will close all pneumatic ball valves to stop the gas supply. After the leakage hazard source is eliminated, click the system reset button to resume the gas supply.

[0051] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A large flow rate hydrogen delivery device, which realizes hydrogen delivery through two gas pipelines, characterized by: It includes a gas leakage monitoring system, a remote / local pressure monitoring system and an emergency shut-off system connected to one end of the two gas pipelines, the two gas pipelines are respectively a user-side gas pipeline and a backup-side gas pipeline, the user-side gas pipeline is connected to the backup-side gas pipeline, and the user-side gas pipeline and the backup-side gas pipeline both include a nitrogen purge system, a high-pressure pressure reduction system, a medium-pressure pressure reduction system and a low-pressure pressure reduction system; The nitrogen purge system, high-pressure pressure reduction system, medium-pressure pressure reduction system, low-pressure pressure reduction system, remote / local pressure monitoring system, and emergency shut-off system are connected in sequence, and the gas leakage monitoring system is installed on the high-pressure pressure reduction system, medium-pressure pressure reduction system, and low-pressure pressure reduction system.

2. The large-flow hydrogen delivery device according to claim 1, characterized in that: The nitrogen purge system of the user-side gas pipeline includes a tubular trailer 1, one end of which is connected to a pneumatic ball valve BV1L-T12, one end of which is respectively connected to a check valve CV1L-V8 and a pressure regulating valve FL1L-T12, and one end of the check valve CV1L-V8 is connected to a diaphragm valve MV1L-V8 for high-pressure purging and replacement of nitrogen.

3. The large-flow hydrogen delivery device according to claim 1, characterized in that: The high-pressure pressure reducing system of the gas pipeline on the user side includes a diaphragm valve MV1L-V4, a diaphragm valve MV2L-V4, and a diaphragm valve MV2L-V8 connected to the pressure regulating valve FL1L-T12. One end of the diaphragm valve MV1L-V4 is connected to a pressure sensor PT1L-V4 connected to the control host, one end of the diaphragm valve MV2L-V4 is connected to a flow sensor PG1L-V4, and one end of the diaphragm valve MV2L-V8 is connected to a check valve CV5W-V8.

4. The large-flow hydrogen delivery device according to claim 3, characterized in that: The medium-pressure pressure reducing system of the gas pipeline on the user side includes a diaphragm valve MV3L-V4, a diaphragm valve MV4L-V4, a diaphragm valve MV3L-V8, and a diaphragm valve MV5L-V8 connected to the gas pipeline on the user side. One end of the diaphragm valve MV5L-V8 is connected to a plug valve RV1L-F8, and the connecting end of the diaphragm valve MV3L-V8 and the plug valve RV1L-F8 is connected to a check valve CV6W-V8. The gas pipeline on the user side is also equipped with a pneumatic ball valve BV2L-T12, a pneumatic valve AV1L-T12, and a constant flow valve REG1L-T12 located between the diaphragm valve MV2L-V8 and the diaphragm valve MV3L-V4.

5. The large-flow hydrogen delivery device according to claim 4, characterized in that: The low-pressure pressure reducing system of the gas transmission pipeline on the user side includes a diaphragm valve MV5L-V4, a diaphragm valve MV6L-V4, a diaphragm valve MV4L-V8, and a diaphragm valve MV7L-V8 installed on the gas transmission pipeline on the user side. One end of the diaphragm valve MV5L-V8 is connected to a plug valve RV2L-F8, and the connecting end of the diaphragm valve MV4L-V8 and the plug valve RV2L-F8 is connected to a check valve CV7W-V8. The gas transmission pipeline on the user side is also installed with a check valve CV2L-T12, a pneumatic ball valve BV3L-T12, a pneumatic ball valve BV1L-T24, and a constant flow valve REG2L-T24 located between the diaphragm valve MV5L-V8 and the diaphragm valve MV5L-V4.

6. The large-flow hydrogen delivery device according to claim 5, characterized in that: The remote / local pressure monitoring system includes a diaphragm valve MV7W-V4, a pneumatic valve AV1W-V8, and a diaphragm valve MV6W-V8 connected to the low-pressure pressure reducing system. One end of the diaphragm valve MV7W-V4 is connected to a pressure sensor PT4W-V4 connected to the control host. The connecting end of the pneumatic valve AV1W-V8 and the diaphragm valve MV6W-V8 is connected to a check valve CV8W-V8. The connecting ends of the check valve CV6W-V8, the check valve CV7W-V8 and the check valve CV8W-V8 are connected to a filter FA1W-T16.

7. The large flow rate hydrogen delivery device according to claim 6, characterized in that: The gas supply pipeline on the use side is also installed with a pneumatic valve AV2L-T24, a check valve CV3L-T24, and a pneumatic ball valve BV2L-T24 located between the diaphragm valve MV7L-V8 and the diaphragm valve MV7W-V4. The pneumatic valve AV2L-T24 and the pneumatic valve AV1L-T12 are connected to conventional driving gas and emergency driving gas through two pipelines.

8. The large-flow hydrogen delivery device according to claim 7, characterized in that: The emergency shut-off system includes a check valve CV4W-T24 and a pneumatic ball valve BV3W-T24 connected to the low-pressure pressure reducing system. One end of the check valve CV4W-T24 is respectively connected to a diaphragm valve MV8W-V4 and a pneumatic ball valve BV2R-T24. One end of the diaphragm valve MV8W-V4 is connected to a flow sensor PG4W-V4.

9. The large-flow hydrogen delivery device according to claim 8, characterized in that: The gas leakage monitoring system includes an audible and visual alarm, an emergency-driven nitrogen valve box connected to the audible and visual alarm interface, a reserved explosion-proof five-hole socket, and three hydrogen detectors. The three hydrogen detectors are respectively installed on the high-pressure pressure reduction system, the medium-pressure pressure reduction system, and the low-pressure pressure reduction system.

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