Diaphragm compressor low-pressure circulation control system and control method thereof

Abstract

The invention discloses a diaphragm compressor low-pressure circulation control system and a control method thereof, and relates to the technical field of diaphragm compressors, the system comprises a hydrogen storage bottle group I, a hydrogen storage bottle group II, a hydrogen storage bottle group III, a hydrogen storage bottle group IV, a hydrogen storage bottle group V and a hydrogen storage bottle group VI which are arranged in parallel, manual valves are arranged at the gas inlet ends and the gas outlet ends of the hydrogen storage bottle group I, the hydrogen storage bottle group II, the hydrogen storage bottle group III, the hydrogen storage bottle group IV, the hydrogen storage bottle group V and the hydrogen storage bottle group VI. Through optimal configuration of the electromagnetic valves and the pipelines, the system can automatically switch three modes of parallel circulation, independent circulation and closed-loop circulation. The parallel connection mode realizes multi-gas-source cooperative pressurization, and the large-flow test run time is shortened; the independent mode supports single-station precise debugging, and parallel interference of multiple devices is avoided; the closed-loop mode realizes gas recycling, and gas source consumption is reduced. The three modes are flexibly combined, the test run process time is shortened, and the product offline rate is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of diaphragm compressors, in particular to a low-pressure circulation control system of a diaphragm compressor and a control method thereof. BACKGROUND

[0002] As a core equipment in the field of hydrogen energy storage and transportation, the performance of the low-pressure circulation test system of a diaphragm compressor directly affects the delivery efficiency and operation reliability of the equipment.

[0003] The existing system only supports single pressure mode test and cannot realize multi-stage switching within the rated pressure range. When it is necessary to verify the adaptability of the equipment under different pressure conditions, the gas source needs to be replaced repeatedly and re-adjusted, which results in a long test time of a single equipment and seriously restricts the production capacity.

[0004] Based on this, the present application provides a low-pressure circulation control system of a diaphragm compressor and a control method thereof, which can eliminate the disadvantages of the existing system. SUMMARY

[0005] The present application aims to provide a low-pressure circulation control system of a diaphragm compressor and a control method thereof to solve the problems in the background art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] A low-pressure circulation control system of a diaphragm compressor comprises hydrogen storage bottle group one, hydrogen storage bottle group two, hydrogen storage bottle group three, hydrogen storage bottle group four, hydrogen storage bottle group five and hydrogen storage bottle group six which are connected in parallel, the hydrogen storage bottle group one, the hydrogen storage bottle group two, the hydrogen storage bottle group three, the hydrogen storage bottle group four, the hydrogen storage bottle group five and the hydrogen storage bottle group six are provided with manual valves at the gas inlet end and the gas outlet end, the gas inlet end and the gas outlet end of the hydrogen storage bottle group one, the hydrogen storage bottle group two, the hydrogen storage bottle group three, the hydrogen storage bottle group four, the hydrogen storage bottle group five and the hydrogen storage bottle group six are connected with bottle group pipeline one and bottle group pipeline two, the bottle group pipeline one is provided with manual valve one and manual valve two, the bottle group pipeline two is provided with manual valve three and manual valve four, the manual valve one and the manual valve three are located between the hydrogen storage bottle group four and the hydrogen storage bottle group five, and the manual valve two and the manual valve four are located between the hydrogen storage bottle group five and the hydrogen storage bottle group six.

[0008] The bottle group pipeline two outgas end and the ventilation pipeline one, ventilation pipeline two and ventilation pipeline three gas inlet end are communicated, the ventilation pipeline one is located on one side of the manual valve three, the ventilation pipeline one is provided with pipeline manual valve one, the ventilation pipeline two is located between the manual valve three and the manual valve four, the ventilation pipeline three is located on one side of the manual valve four, the ventilation pipeline one, ventilation pipeline two and ventilation pipeline three gas outlet end and the total pipeline gas inlet end are communicated, the total pipeline gas outlet end and the inlet pipeline one and inlet pipeline two gas inlet end are communicated, the inlet pipeline one gas outlet end and the inlet buffer tank one gas inlet end are communicated, the inlet buffer tank one gas outlet end and the circulating test station one gas inlet end are communicated, the circulating test station one gas outlet end and the inlet pipeline one are communicated, the inlet pipeline two gas outlet end and the inlet buffer tank two gas inlet end are communicated, the inlet buffer tank two gas outlet end and the circulating test station two gas inlet end are communicated, the circulating test station two gas outlet end and the inlet pipeline one and inlet pipeline two are communicated, the inlet pipeline one is provided with pipeline manual valve two, the pipeline manual valve two is located between the circulating test station one and the circulating test station two.

[0009] The bottle group pipeline two outgas end and the ventilation pipeline one, ventilation pipeline two and ventilation pipeline three gas inlet end are communicated, the ventilation pipeline one is located on one side of the manual valve three, the ventilation pipeline one is provided with pipeline manual valve one, the ventilation pipeline two is located between the manual valve three and the manual valve four, the ventilation pipeline three is located on one side of the manual valve four, the ventilation pipeline one, ventilation pipeline two and ventilation pipeline three gas outlet end and the total pipeline gas inlet end are communicated, the total pipeline gas outlet end and the inlet pipeline one and inlet pipeline two gas inlet end are communicated, the inlet pipeline one gas outlet end and the inlet buffer tank one gas inlet end are communicated, the inlet buffer tank one gas outlet end and the circulating test station one gas inlet end are communicated, the circulating test station one gas outlet end and the inlet pipeline one are communicated, the inlet pipeline two gas outlet end and the inlet buffer tank two gas inlet end are communicated, the inlet buffer tank two gas outlet end and the circulating test station two gas inlet end are communicated, the circulating test station two gas outlet end and the inlet pipeline one and inlet pipeline two are communicated, the inlet pipeline one is provided with pipeline manual valve two, the pipeline manual valve two is located between the circulating test station one and the circulating test station two.

[0010] Preferably, the connecting pipeline three, connecting pipeline one, connecting pipeline four, ventilation pipeline one, ventilation pipeline two and ventilation pipeline three are provided with pressure value instruments, and the pressure value instruments are provided with instrument manual valves.

[0011] Preferably, the inlet pipeline three, connecting pipeline three, connecting pipeline one, connecting pipeline four, ventilation pipeline one, ventilation pipeline two and ventilation pipeline three are provided with hydrogen gas vent interfaces, and the hydrogen gas vent interfaces are provided with vent interface manual valves.

[0012] Preferably, the ventilation pipeline one, ventilation pipeline two and ventilation pipeline three are provided with displacement gas interfaces, and the displacement gas interfaces are provided with air exchange interface manual valves and air exchange interface one-way valves.

[0013] Preferably, the inlet pipeline three, inlet pipeline four, inlet pipeline one, inlet pipeline two, connecting pipeline one, connecting pipeline four, ventilation pipeline one, ventilation pipeline two and ventilation pipeline three are provided with valve groups.

[0014] Preferably, the valve group comprises a valve group manual valve, a valve group electromagnetic valve and a valve group check valve, which are arranged in series along the gas flow direction.

[0015] The control method of the diaphragm compressor low-pressure circulation control system comprises the following steps:

[0016] S1 first opens the inlet end manual valves of the first, second, third, fourth, fifth and sixth hydrogen storage bottle groups, and the pipeline manual valves 3, 1, 2, 3, 4 and 1, and then closes the manual valves of the hydrogen vent interface and the manual valves of the replacement gas interface, and checks that the valve group manual valves are in the open state and the valve group electromagnetic valves are in the power-off closed state.

[0017] S2: Select one of the parallel circulation mode, the independent circulation mode and the closed loop circulation mode to start control execution.

[0018] The control method of the parallel circulation mode comprises the following steps:

[0019] S11: Close the pipeline manual valve 2, the manual valve 1 and the manual valve 2, start the circulation test station 1 and the circulation test station 2, open the valve group electromagnetic valves in the valve group on the ventilation pipeline 1 and the valve group electromagnetic valves in the valve group on the ventilation pipeline 2,

[0020] S12: The first, second, third and fourth hydrogen storage bottle groups are connected in parallel to the circulation test station 1 and the circulation test station 2, and the circulation test station 1 and the circulation test station 2 pressurize the gas.

[0021] S13: The pressurized gas in the circulation test station 1 enters the gas inlet pipeline 1, and since the valve group electromagnetic valve in the valve group on the gas inlet pipeline 1 is in the closed state, the gas enters the connection pipeline 1 from the gas inlet pipeline 1, the valve group electromagnetic valve in the valve group on the connection pipeline 1 is opened, and the gas enters the fifth hydrogen storage bottle group from the connection pipeline 1.

[0022] S14: The pressurized gas in the circulation test station 2 enters the gas inlet pipeline 2, and since the valve group electromagnetic valve in the valve group on the gas inlet pipeline 2 is in the closed state, the gas enters the connection pipeline 4 from the gas inlet pipeline 2, the valve group electromagnetic valve in the valve group on the connection pipeline 4 is opened, and the gas enters the sixth hydrogen storage bottle group from the connection pipeline 4.

[0023] The control method of the independent circulation mode first selects one of the circulation test station 1 or the circulation test station 2 to start.

[0024] Selecting to start the circulation test station 1 comprises the following steps:

[0025] S21: closing the manual valve three, the manual valve four and the pipeline manual valve two, opening the valve group electromagnetic valve of the valve group on the air inlet pipeline one and the air inlet pipeline two;

[0026] S22: the gas in the hydrogen storage bottle group five passes through the air inlet pipeline two, the air inlet pipeline one and the air inlet buffer tank one in sequence and enters the circulating test station one, and the circulating test station one carries out pressure treatment on the gas;

[0027] S23: since the pipeline manual valve two is in a closed state, the pressurized gas enters the air inlet pipeline one, and since the valve group electromagnetic valve of the valve group on the air inlet pipeline one is in an open state, the gas enters the connecting pipeline two;

[0028] S24: the gas passes through the connecting pipeline two and enters the hydrogen storage bottle group one, the hydrogen storage bottle group two, the hydrogen storage bottle group three and the hydrogen storage bottle group four;

[0029] selecting to start the circulating test station two, comprising the following steps:

[0030] S31: closing the manual valve four and the pipeline manual valve two, opening the valve group electromagnetic valve of the valve group on the air inlet pipeline two and the air inlet pipeline three;

[0031] S32: the gas in the hydrogen storage bottle group six passes through the air inlet pipeline three, the air inlet pipeline two and the air inlet buffer tank two in sequence and enters the circulating test station two, and the circulating test station two carries out pressure treatment on the gas;

[0032] S33: since the pipeline manual valve two is in a closed state, the pressurized gas enters the air inlet pipeline two, and since the valve group electromagnetic valve of the valve group on the air inlet pipeline two is in an open state, the gas enters the connecting pipeline two;

[0033] S34: the gas passes through the connecting pipeline two and enters the hydrogen storage bottle group one, the hydrogen storage bottle group two, the hydrogen storage bottle group three and the hydrogen storage bottle group four.

[0034] the control method of the closed loop circulation mode, comprising the following steps:

[0035] S41: closing the manual valve one and the manual valve three, opening the valve group electromagnetic valve of the valve group on the air inlet pipeline one and the air inlet pipeline two;

[0036] S42: the parallel gas sources of the hydrogen storage bottle group one, the hydrogen storage bottle group two, the hydrogen storage bottle group three and the hydrogen storage bottle group four pass through the air inlet pipeline one and enter the summary pipeline, and the summary pipeline delivers the gas to the air inlet pipeline one and the air inlet pipeline two;

[0037] S43: the circulating test station one and the circulating test station two in the air inlet pipeline one and the air inlet pipeline two carry out pressure treatment on the gas;

[0038] S44: The pressurized gas enters the gas inlet pipeline one, and since the valve group on the connecting pipeline one is in the closed state, the gas enters the connecting pipeline two through the gas inlet pipeline one;

[0039] S45: The connecting pipeline two delivers the gas to the connecting pipeline three, and the gas is delivered to the hydrogen storage bottle group one, the hydrogen storage bottle group two, the hydrogen storage bottle group three and the hydrogen storage bottle group four through the connecting pipeline three.

[0040] Compared with the prior art, the beneficial effects of the present application are as follows:

[0041] 1. Through the optimized configuration of the electromagnetic valve and the pipeline, the system can automatically switch three modes of parallel circulation, independent circulation and closed loop circulation. The parallel mode realizes multi-gas source coordinated pressurization, shortens the large flow test time; the independent mode supports single station precise debugging, avoids multi-device parallel interference; the closed loop mode realizes gas recycling, reduces gas source consumption. The three modes are flexibly combined, the test process time is shortened, and the product outflow rate is improved.

[0042] 2. The present application forms a double protection mechanism through the series connection design of the electromagnetic valve and the manual valve, the electromagnetic valve realizes remote automatic control, and the manual valve serves as a mechanical hard backup; combined with the pressure value instrument, when the pressure is over limit, the automatic positioning venting interface is positioned and an alarm is given, nitrogen is introduced into the replacement gas interface to replace the residual hydrogen, the system safety risk is reduced, and the maintenance cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0043] Fig. 1 is a structural schematic diagram of the present application.

[0044] Fig. 2 is a structural schematic diagram of the valve group of the present application.

[0045] Attached diagram labels: 1. Hydrogen storage cylinder group one; 2. Hydrogen storage cylinder group two; 3. Hydrogen storage cylinder group three; 4. Hydrogen storage cylinder group four; 5. Hydrogen storage cylinder group five; 6. Hydrogen storage cylinder group six; 7. Cylinder group pipeline one; 71. Manual valve one; 72. Manual valve two; 8. Cylinder group pipeline two; 81. Manual valve three; 82. Manual valve four; 9. Pressure gauge; 91. Instrument manual valve; 10. Hydrogen vent port; 101. Vent port manual valve; 11. Replacement gas port; 111. Replacement gas port manual valve; 112. Replacement gas port check valve; 12. Vent pipeline one; 121. Pipeline manual valve one; 13. Vent pipeline two; 14. Vent pipeline three ; 15. Valve assembly; 151. Manual valve of valve assembly; 152. Solenoid valve of valve assembly; 153. Check valve of valve assembly; 16. Main pipeline; 17. Inlet pipeline one; 171. Inlet buffer tank one; 172. Cyclic test station one; 18. Inlet pipeline two; 181. Inlet buffer tank two; 182. Cyclic test station two; 19. Inlet pipeline one; 191. Manual valve two of the pipeline; 20. Connecting pipeline one; 21. Connecting pipeline two; 22. Connecting pipeline three; 221. Manual valve three of the pipeline; 222. Temperature instrument; 23. Inlet pipeline two; 24. Connecting pipeline four; 25. Inlet pipeline three; 26. Inlet pipeline four. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0047] Example 1

[0048] In one embodiment, such as Figs. 1-2 As shown, a low-pressure circulation control system for a diaphragm compressor includes hydrogen storage tank groups 1, 2, 3, 4, 5, and 6 arranged in parallel. Each of the hydrogen storage tank groups 1, 2, 3, 4, 5, and 6 is equipped with a manual valve at both its inlet and outlet. Each of the hydrogen storage tank groups 1, 2, 3, 4, 5, and 6 has a manual valve at its inlet and outlet. The inlet and outlet ends of hydrogen cylinder group 5 and hydrogen storage cylinder group 6 are respectively connected to cylinder group pipeline 7 and cylinder group pipeline 8. Manual valve 1 71 and manual valve 2 72 are installed on cylinder group pipeline 7, and manual valve 3 81 and manual valve 4 82 are installed on cylinder group pipeline 8. Manual valve 1 71 and manual valve 3 81 are located between hydrogen storage cylinder group 4 and hydrogen storage cylinder group 5, and manual valve 2 72 and manual valve 4 82 are located between hydrogen storage cylinder group 5 and hydrogen storage cylinder group 6.

[0049] The bottle group pipeline 7 gas inlet end is connected with the connecting pipeline 3 22, the connecting pipeline 1 20 and the connecting pipeline 4 24 gas outlet end, the connecting pipeline 3 22 is located on the side of the manual valve 1 71, the connecting pipeline 3 22 is provided with the pipeline manual valve 3 221 and the temperature value instrument 222, the connecting pipeline 1 20 is located between the manual valve 1 71 and the manual valve 2 72, the connecting pipeline 4 24 is located on the side of the manual valve 2 72, the connecting pipeline 3 22 gas inlet end is connected with the connecting pipeline 2 21 gas outlet end, the connecting pipeline 2 21 gas inlet end is connected with the inlet gas pipeline 3 25, the inlet gas pipeline 4 26 and the inlet gas pipeline 1 19 gas outlet end, the connecting pipeline 1 20 gas inlet end is connected with the inlet gas pipeline 1 19 gas outlet end, the connecting pipeline 4 24 gas inlet end is connected with the inlet gas pipeline 2 23 gas outlet end;

[0050] The bottle group pipeline 7 gas inlet end is connected with the connecting pipeline 3 22, the connecting pipeline 1 20 and the connecting pipeline 4 24 gas outlet end, the connecting pipeline 3 22 is located on the side of the manual valve 1 71, the connecting pipeline 3 22 is provided with the pipeline manual valve 3 221 and the temperature value instrument 222, the connecting pipeline 1 20 is located between the manual valve 1 71 and the manual valve 2 72, the connecting pipeline 4 24 is located on the side of the manual valve 2 72, the connecting pipeline 3 22 gas inlet end is connected with the connecting pipeline 2 21 gas outlet end, the connecting pipeline 2 21 gas inlet end is connected with the inlet gas pipeline 3 25, the inlet gas pipeline 4 26 and the inlet gas pipeline 1 19 gas outlet end, the connecting pipeline 1 20 gas inlet end is connected with the inlet gas pipeline 1 19 gas outlet end, the connecting pipeline 4 24 gas inlet end is connected with the inlet gas pipeline 2 23 gas outlet end;

[0051] The hydrogen storage bottle group 1, the hydrogen storage bottle group 2, the hydrogen storage bottle group 3, the hydrogen storage bottle group 4 and the hydrogen storage bottle group 5, the hydrogen storage bottle group 6 are physically isolated by the manual valve 3 81, the manual valve 4 82, the problem of single pressure regulation of the traditional parallel system is solved.

[0052] In an optional embodiment, the connecting pipeline 3 22, the connecting pipeline 1 20, the connecting pipeline 4 24, the ventilation pipeline 1 12, the ventilation pipeline 2 13 and the ventilation pipeline 3 14 are all provided with the pressure value instrument 9, and the pressure value instrument 9 is provided with the instrument manual valve 91.

[0053] It should be noted that the pressure value instrument 9 monitors the gas pressure of the pipeline in real time, and the pressure value instrument 9 is electrically connected with the controller on the system, and is used for feeding back whether the gas pressure of the pipeline is in a normal state.

[0054] In an optional embodiment, a hydrogen vent interface 10 is arranged on the gas inlet pipeline three 25, the connecting pipeline three 22, the connecting pipeline one 20, the connecting pipeline four 24, the ventilation pipeline one 12, the ventilation pipeline two 13 and the ventilation pipeline three 14, and the hydrogen vent interface 10 is provided with a vent interface manual valve 101.

[0055] It should be noted that when the pressure value instrument 9 shows that the pressure of a pipeline is out of limit, the system automatically locates the nearest vent interface 10 (for example, 101 of the ventilation pipeline two 13), and prompts an operator to open the valve preferentially.

[0056] In an optional embodiment, a displacement gas interface 11 is arranged on the ventilation pipeline one 12, the ventilation pipeline two 13 and the ventilation pipeline three 14, and the displacement gas interface 11 is provided with a gas exchange interface manual valve 111 and a gas exchange interface one-way valve 112.

[0057] It should be noted that all the hydrogen storage bottle group manual valves are closed, and the displacement gas interface manual valve 111 is opened; nitrogen is introduced, the nitrogen enters the ventilation pipeline through the one-way valve 112, and residual hydrogen is replaced; the one-way valve 112 prevents the backflow of the sweeping nitrogen to the hydrogen storage bottle group in the process, and avoids the pollution of the gas in the bottle.

[0058] In an optional embodiment, a valve group 15 is arranged on the gas inlet pipeline three 25, the gas inlet pipeline four 26, the gas inlet pipeline one 19, the gas inlet pipeline two 23, the connecting pipeline one 20, the connecting pipeline four 24, the ventilation pipeline one 12, the ventilation pipeline two 13 and the ventilation pipeline three 14.

[0059] It should be noted that the valve group 15 is electrically connected with the controller on the system, and when the pressure value instrument 9 feeds back that the pipeline is in an abnormal state, the controller controls the valve group 15 to be opened or closed, so that the gas pressure is adjusted to be in a normal state.

[0060] In an optional embodiment, the valve group 15 includes a valve group manual valve 151, a valve group electromagnetic valve 152 and a valve group one-way valve 153, and the valve group manual valve 151, the valve group electromagnetic valve 152 and the valve group one-way valve 153 are arranged in series along the gas flow direction.

[0061] It should be noted that the manual valve is a mechanical hard cut-off device, and the electromagnetic valve supports remote automatic control of the controller

[0062] Embodiment two

[0063] In one embodiment, the control method of the diaphragm compressor low-pressure circulation control system described above comprises the following steps:

[0064] S1: First, before the system is running, open the hydrogen storage bottle group 1, the hydrogen storage bottle group 2, the hydrogen storage bottle group 3, the hydrogen storage bottle group 4, the hydrogen storage bottle group 5 and the hydrogen storage bottle group 6 inlet end hand valve, and the pipeline hand valve three 221, the hand valve one 71, the hand valve two 72, the hand valve three 81, the hand valve four 82 and the pipeline hand valve one 121 in turn, then close the venting interface hand valve 101 of the hydrogen venting interface 10 and the gas exchange interface hand valve 111 of the gas exchange interface 11 in turn, and check that all valve group 15 valve group hand valves 151 are in the open state and the valve group solenoid valve 152 is in the power-off closed state.

[0065] S2: Select one of the parallel circulation mode, the independent circulation mode and the closed loop circulation mode to start control execution.

[0066] The control method of the parallel circulation mode comprises the following steps:

[0067] S11: Close the pipeline hand valve two 191, the hand valve one 71 and the hand valve two 72, start the circulation test station one 172 and the circulation test station two 182, open the valve group solenoid valve 152 in the valve group 15 on the ventilation pipeline one 12 and the valve group solenoid valve 152 in the valve group 15 on the ventilation pipeline two 13,

[0068] S12: The hydrogen storage bottle group 1, the hydrogen storage bottle group 2, the hydrogen storage bottle group 3 and the hydrogen storage bottle group 4 parallel gas source enter the circulation test station one 172 and the circulation test station two 182, and the circulation test station one 172 and the circulation test station two 182 pressurize the gas;

[0069] S13: The pressurized gas in the circulation test station one 172 enters the gas inlet pipeline one 19, and since the valve group solenoid valve 152 of the valve group 15 on the gas inlet pipeline one 19 is in the closed state, the gas enters the connection pipeline one 20 from the gas inlet pipeline one 19, the valve group solenoid valve 152 of the valve group 15 on the connection pipeline one 20 is opened, and the gas enters the hydrogen storage bottle group five 5 from the connection pipeline one 20;

[0070] S14: The pressurized gas in the circulation test station two 182 enters the gas inlet pipeline two 23, and since the valve group solenoid valve 152 of the valve group 15 on the gas inlet pipeline two 23 is in the closed state, the gas enters the connection pipeline four 24 from the gas inlet pipeline two 23, the valve group solenoid valve 152 of the valve group 15 on the connection pipeline four 24 is opened, and the gas enters the hydrogen storage bottle group six 6 from the connection pipeline four 24.

[0071] The control method of the independent circulation mode first selects one of the circulation test station one 172 or the circulation test station two 182 to start.

[0072] The selection of the start-up cycle test station 1 172 includes the following steps:

[0073] S21: Close the manual valve 3 81, the manual valve 4 82 and the pipeline manual valve 2 191, and open the valve group electromagnetic valve 152 of the valve group 15 on the air inlet pipeline 2 13 and the air inlet pipeline 1 19;

[0074] S22: The gas in the hydrogen storage bottle group 5 enters the cycle test station 1 172 in sequence through the air inlet pipeline 2 13, the air inlet pipeline 1 17 and the air inlet buffer tank 1 171, and the cycle test station 1 172 performs pressure processing on the gas;

[0075] S23: Since the pipeline manual valve 2 191 is in a closed state, the pressurized gas enters the air inlet pipeline 1 19, and since the valve group electromagnetic valve 152 of the valve group 15 on the air inlet pipeline 1 19 is in an open state, the gas enters the connecting pipeline 2 21;

[0076] S24: The gas enters the hydrogen storage bottle group 1, the hydrogen storage bottle group 2, the hydrogen storage bottle group 3 and the hydrogen storage bottle group 4 through the connecting pipeline 2 21;

[0077] The selection of the start-up cycle test station 2 182 includes the following steps:

[0078] S31: Close the manual valve 4 82 and the pipeline manual valve 2 191, and open the valve group electromagnetic valve 152 of the valve group 15 on the air inlet pipeline 3 14 and the air inlet pipeline 2 23;

[0079] S32: The gas in the hydrogen storage bottle group 6 enters the cycle test station 2 182 in sequence through the air inlet pipeline 3 14, the air inlet pipeline 2 18 and the air inlet buffer tank 2 181, and the cycle test station 2 182 performs pressure processing on the gas;

[0080] S33: Since the pipeline manual valve 2 191 is in a closed state, the pressurized gas enters the air inlet pipeline 2 23, and since the valve group electromagnetic valve 152 of the valve group 15 on the air inlet pipeline 2 23 is in an open state, the gas enters the connecting pipeline 2 21;

[0081] S34: The gas enters the hydrogen storage bottle group 1, the hydrogen storage bottle group 2, the hydrogen storage bottle group 3 and the hydrogen storage bottle group 4 through the connecting pipeline 2 21.

[0082] The control method of the closed cycle mode includes the following steps:

[0083] S41: Close the manual valve 1 71 and the manual valve 3 81, and open the valve group electromagnetic valve 152 of the valve group 15 on the air inlet pipeline 1 12 and the air inlet pipeline 1 19;

[0084] S42: hydrogen storage bottle group one 1, hydrogen storage bottle group two 2, hydrogen storage bottle group three 3 and hydrogen storage bottle group four 4 parallel gas source through the air pipe line 12 into the summary pipe line 16, the summary pipe line 16 will be gas delivered to the air inlet pipe line one 17 and air inlet pipe line two 18 in the middle;

[0085] S43: the circulating test station one 172 and circulating test station two 182 in the air inlet pipe line one 17 and air inlet pipe line two 18 carry out pressurization treatment to the gas;

[0086] S44: the pressurized gas enters the air inlet pipe line one 19, because the valve group 15 on the connecting pipe line one 20 is in the closed state, the gas enters the connecting pipe line two 21 through the air inlet pipe line one 19;

[0087] S45: the connecting pipe line two 21 will be gas delivered to the connecting pipe line three 22, and through the connecting pipe line three 22 to the hydrogen storage bottle group one 1, hydrogen storage bottle group two 2, hydrogen storage bottle group three 3 and hydrogen storage bottle group four 4 in the middle.

[0088] The above, only for the specific embodiments of the present application, but the protection scope of the present application is not limited to this, any familiar with the technical personnel in the technical range of the present application can easily think of changes or replacement, should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A low-pressure circulation control system for a diaphragm compressor, characterized in that, The system includes four hydrogen storage cylinder groups (1, 2, 3, 4, 5, and 6) connected in parallel. Each of these groups has a manual valve at both its inlet and outlet. The inlet and outlet of group six (6) are connected to cylinder group pipeline one (7) and cylinder group pipeline two (8) respectively. Manual valve one (71) and manual valve two (72) are provided on cylinder group pipeline one (7), and manual valve three (81) and manual valve four (82) are provided on cylinder group pipeline two (8). Manual valve one (71) and manual valve three (81) are located between hydrogen storage cylinder group four (4) and hydrogen storage cylinder group five (5), and manual valve two (72) and manual valve four (82) are located between hydrogen storage cylinder group five (5) and hydrogen storage cylinder group six (6). The inlet of the first (7) of the bottle group is connected to the outlet of the third (22), the first (20) and the fourth (24) of the connecting pipe. The third (22) is located on one side of the first (71) manual valve. The third (22) is equipped with the third (221) manual valve and the temperature instrument (222). The first (20) is located between the first (71) and the second (72) manual valve. The fourth (24) Located on one side of manual valve two (72), the air inlet of the connecting pipe three (22) is connected to the air outlet of the connecting pipe two (21), the air inlet of the connecting pipe two (21) is connected to the air outlet of the air inlet pipe three (25), the air inlet pipe four (26) and the air outlet of the air inlet pipe one (19), the air inlet of the connecting pipe one (20) is connected to the air outlet of the air inlet pipe one (19), and the air inlet of the connecting pipe four (24) is connected to the air outlet of the air inlet pipe two (23). The outlet of the second (8) of the bottle group is connected to the inlet of the first (12), the second (13) and the third (14) of the ventilation pipeline. The first (12) of the ventilation pipeline is located on one side of the third (81) of the manual valve. The first (12) of the ventilation pipeline is equipped with the first (121) of the pipeline. The second (13) of the ventilation pipeline is located between the third (81) and the fourth (82) of the manual valve. The third (14) of the ventilation pipeline is located on one side of the fourth (82) of the manual valve. The outlets of the first (12), the second (13) and the third (14) of the ventilation pipeline are connected to the inlet of the main pipeline (16). The outlet of the main pipeline (16) is connected to the inlet of the first (17) and the second (18) of the inlet pipeline. The outlet of the first (17) of the inlet pipeline is connected to the inlet of the main pipeline. The air inlet of the first air buffer tank (171) is connected to the air outlet of the first air buffer tank (171) and the air inlet of the first cyclic test station (172). The air outlet of the first cyclic test station (172) is connected to the first air inlet pipe (19). The air outlet of the second air inlet pipe (18) is connected to the air inlet of the second air buffer tank (181). The air outlet of the second air buffer tank (181) is connected to the air inlet of the second cyclic test station (182). The air outlet of the second cyclic test station (182) is connected to the first air inlet pipe (19) and the second air inlet pipe (23). The first air inlet pipe (19) is equipped with a second manual valve (191). The second manual valve (191) is located between the first cyclic test station (172) and the second cyclic test station (182).

2. The low-pressure circulation control system for a diaphragm compressor according to claim 1, characterized in that, Pressure gauges (9) are installed on the connecting pipes 3 (22), 1 (20), 4 (24), 1 (12), 2 (13) and 3 (14), and manual valves (91) are installed on the pressure gauges (9).

3. The low-pressure circulation control system for a diaphragm compressor according to claim 1, characterized in that, Hydrogen venting ports (10) are provided on the three inlet pipes (25), three connecting pipes (22), one connecting pipe (20), four connecting pipes (24), one ventilation pipe (12), two ventilation pipes (13) and three ventilation pipes (14), and a manual venting port valve (101) is provided on the hydrogen venting port (10).

4. The low-pressure circulation control system for a diaphragm compressor according to claim 1, characterized in that, The ventilation pipeline 1 (12), ventilation pipeline 2 (13) and ventilation pipeline 3 (14) are all equipped with a replacement air interface (11), and the replacement air interface (11) is equipped with a replacement air interface manual valve (111) and a replacement air interface check valve (112).

5. A low-pressure circulation control system for a diaphragm compressor according to claim 1, characterized in that, Valve groups (15) are provided on the air inlet pipe three (25), air inlet pipe four (26), air inlet pipe one (19), air inlet pipe two (23), connecting pipe one (20), connecting pipe four (24), ventilation pipe one (12), ventilation pipe two (13) and ventilation pipe three (14).

6. A low-pressure circulation control system for a diaphragm compressor according to claim 5, characterized in that, The valve group (15) includes a manual valve (151), a solenoid valve (152), and a check valve (153), which are connected in series along the gas flow direction.

7. A control method for a low-pressure circulation control system of a diaphragm compressor according to any one of claims 1 to 6, characterized in that, Includes the following steps: S1: First, before the system is running, open the manual valves at the inlet of hydrogen storage cylinder group 1 (1), hydrogen storage cylinder group 2 (2), hydrogen storage cylinder group 3 (3), hydrogen storage cylinder group 4 (4), hydrogen storage cylinder group 5 (5) and hydrogen storage cylinder group 6 (6) in sequence, as well as the manual valves at the pipeline 3 (221), 1 (71), 2 (72), 3 (81), 4 (82) and 1 (121); then close the manual valve at the venting port of the hydrogen venting port (10) and the manual valve at the gas replacement port (111) in sequence; and verify that the manual valves (151) in all valve groups (15) are in the open state and the solenoid valves (152) in the valve group are in the de-energized closed state. S2: Select one of the following modes to start control execution: parallel loop mode, independent loop mode, and closed loop mode.

8. The control method for a low-pressure circulation control system of a diaphragm compressor according to claim 7, characterized in that, The control method for the parallel cyclic mode includes the following steps: S11: Close manual valve 2 (191), manual valve 1 (71), and manual valve 2 (72) of the pipeline; start the cycle test station 1 (172) and cycle test station 2 (182); open the valve group solenoid valve (152) in valve group (15) of vent pipeline 1 (12) and valve group solenoid valve (152) in valve group (15) of vent pipeline 2 (13). S12: Hydrogen storage cylinder group 1 (1), hydrogen storage cylinder group 2 (2), hydrogen storage cylinder group 3 (3) and hydrogen storage cylinder group 4 (4) are connected in parallel to enter the cyclic test station 1 (172) and cyclic test station 2 (182), and the cyclic test station 1 (172) and cyclic test station 2 (182) pressurize the gas; S13: The pressurized gas in the first cyclic test station (172) enters the first inlet pipe (19). Since the valve group solenoid valve (152) of the valve group (15) on the first inlet pipe (19) is in the closed state, the gas enters the first connecting pipe (20) from the first inlet pipe (19). The valve group solenoid valve (152) of the valve group (15) on the first connecting pipe (20) is opened, and the gas enters the fifth hydrogen storage cylinder group (5) from the first connecting pipe (20). S14: The pressurized gas in the second (182) of the cycle test station enters the second (23) of the inlet pipe. Since the valve group solenoid valve (152) of the valve group (15) on the second (23) of the inlet pipe is in the closed state, the gas enters the fourth (24) of the connecting pipe from the second (23). The valve group solenoid valve (152) of the valve group (15) on the fourth (24) of the connecting pipe is opened, and the gas enters the sixth (6) of the hydrogen storage cylinder group from the fourth (24).

9. The control method for a low-pressure circulation control system of a diaphragm compressor according to claim 7, characterized in that, The control method for the independent cycle mode firstly selects either the first cycle test station (172) or the second cycle test station (182); Select the start-up cycle test station 1 (172), including the following steps: S21: Close manual valve three (81), manual valve four (82) and pipeline manual valve two (191), and open the valve group solenoid valve (152) of valve group (15) on vent pipeline two (13) and vent pipeline one (19); S22: The gas in the hydrogen storage cylinder group five (5) enters the cycle test station one (172) through the ventilation pipeline two (13), the inlet pipeline one (17), and the inlet buffer tank one (171) in sequence. The cycle test station one (172) pressurizes the gas. S23: Since the manual valve 2 (191) of the pipeline is closed, the pressurized gas enters the inlet pipeline 1 (19), and since the valve group solenoid valve (152) of the valve group (15) on the inlet pipeline 1 (19) is open, the gas enters the connecting pipeline 2 (21). S24: Gas is fed into hydrogen storage cylinder group 1 (1), hydrogen storage cylinder group 2 (2), hydrogen storage cylinder group 3 (3), and hydrogen storage cylinder group 4 (4) through connecting pipe 2 (21); Select the second (182) station for starting the cycle test, including the following steps: S31: Close manual valve four (82) and pipeline manual valve two (191), and open the valve group solenoid valve (152) of valve group (15) on vent pipeline three (14) and inlet pipeline two (23); S32: The gas in the hydrogen storage cylinder group six (6) enters the cycle test station two (182) through the ventilation pipeline three (14), the gas inlet pipeline two (18), and the gas inlet buffer tank two (181) in sequence. The cycle test station two (182) pressurizes the gas. S33: Since the manual valve 2 (191) of the pipeline is closed, the pressurized gas enters the inlet pipeline 2 (23), and since the valve group solenoid valve (152) of the valve group (15) on the inlet pipeline 2 (23) is open, the gas enters the connecting pipeline 2 (21). S34: Gas is fed into hydrogen storage cylinder group one (1), hydrogen storage cylinder group two (2), hydrogen storage cylinder group three (3), and hydrogen storage cylinder group four (4) through connecting pipe two (21).

10. The control method for a low-pressure circulation control system of a diaphragm compressor according to claim 7, characterized in that, The control method for the closed-loop mode includes the following steps: S41: Close manual valve one (71) and manual valve three (81), and open the valve group solenoid valve (152) of valve group (15) on vent line one (12) and vent line one (19); S42: The parallel gas sources of hydrogen storage cylinder group 1 (1), hydrogen storage cylinder group 2 (2), hydrogen storage cylinder group 3 (3) and hydrogen storage cylinder group 4 (4) enter the main pipeline (16) through the ventilation pipeline 1 (12), and the main pipeline (16) delivers the gas to the intake pipeline 1 (17) and intake pipeline 2 (18). S43: The gas is pressurized at the first (172) and the second (182) of the cycle test station in the first (17) and the second (18) of the intake pipe; S44: The pressurized gas enters the first inlet pipe (19). Since the valve group (15) on the first connecting pipe (20) is closed, the gas enters the second connecting pipe (21) through the first inlet pipe (19). S45: Connecting pipe 2 (21) delivers gas to connecting pipe 3 (22), and then through connecting pipe 3 (22) delivers it to hydrogen storage cylinder group 1 (1), hydrogen storage cylinder group 2 (2), hydrogen storage cylinder group 3 (3) and hydrogen storage cylinder group 4 (4).

Images