CN110702528A - Ultrahigh pressure hydrogen pressure test system - Google Patents
Ultrahigh pressure hydrogen pressure test system Download PDFInfo
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- CN110702528A CN110702528A CN201911056275.6A CN201911056275A CN110702528A CN 110702528 A CN110702528 A CN 110702528A CN 201911056275 A CN201911056275 A CN 201911056275A CN 110702528 A CN110702528 A CN 110702528A
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 107
- 239000001257 hydrogen Substances 0.000 title claims abstract description 103
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 103
- 238000012360 testing method Methods 0.000 title claims abstract description 55
- 239000007789 gas Substances 0.000 claims abstract description 120
- 230000001105 regulatory effect Effects 0.000 claims description 21
- 238000010926 purge Methods 0.000 claims description 20
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 13
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 239000011148 porous material Substances 0.000 claims description 3
- 238000002474 experimental method Methods 0.000 description 11
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 230000006837 decompression Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0044—Pneumatic means
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- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
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- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses an ultrahigh pressure hydrogen pressure test system which comprises a hydrogen input port, wherein the hydrogen input port is connected with an air inlet of a first gas cylinder group through a first pipeline provided with a first stop valve, an air outlet of the first gas cylinder group is connected with an air inlet of a second gas cylinder group through a second pipeline provided with a pressure reducing valve, an air outlet of the second gas cylinder group is connected with an air inlet of a 120MPa hydrogen compressor through a third pipeline, an air outlet of the 120MPa hydrogen compressor is connected with an air inlet of a high pressure gas cylinder group through a fourth pipeline, an air outlet of the high pressure gas cylinder group is connected with a hydrogen inlet and a hydrogen outlet of a test gas cylinder through a fifth pipeline, and the fifth pipeline is also connected with the first pipeline through a sixth pipeline provided with a fifth pneumatic ball valve and a second one-way valve. The pressure measuring and testing device is high in pressure testing pressure, a diaphragm type compressor and a high-pressure liquid-drive oil-free piston machine combined pressurization mode is adopted, and the pressurization pressure can reach 120 MPa.
Description
Technical Field
The invention relates to the technical field of skid-mounted hydrogenation equipment, in particular to an ultrahigh pressure hydrogen pressure test system.
Background
With the continuous development of new energy, hydrogen energy is developed more and more rapidly, and the demand for hydrogen cylinders with higher pressure and larger volume is higher and higher. The demand for detection equipment required for the production and development of hydrogen cylinders is also increasing.
The high-pressure hydrogen pressure test system is used for carrying out hydrogen circulation experiments on hydrogen cylinders, and the current high-pressure hydrogen pressure test system has the following defects:
(1) the system pressure is low, the highest working pressure of the current high-pressure hydrogen pressure test system is 70MPa, and the requirement of a pressure circulation experiment of a 90MPa hydrogen cylinder cannot be met;
(2) the system flow is small, the experiment efficiency is low, and the experiment time is long;
(3) the system does not have the temperature regulation function, and the temperature of the hydrogen filled in the hydrogen cylinder is too high, so that the test experiment requirement of the hydrogen cylinder is not met;
(4) the system does not have the flow control function, and the hydrogen filled in the hydrogen cylinder can be only regulated qualitatively, but not quantitatively, and detailed experimental parameters cannot be controlled.
An effective solution to the problems in the related art has not been proposed yet.
Disclosure of Invention
Aiming at the technical problems in the related art, the invention provides an ultrahigh pressure hydrogen pressure test system which adopts a diaphragm compressor and a high-pressure liquid-drive oil-free piston machine two-stage pressurization mode, and has high system output pressure; accurately controlling the gas quantity of gas filled into and discharged from the test gas cylinder by adopting a flowmeter and an electric flow regulating valve; the precooling unit is adopted to reduce the high temperature generated when high-pressure large-flow gas is instantly filled into the test gas cylinder.
In order to achieve the technical purpose, the technical scheme of the invention is realized as follows:
the utility model provides an ultrahigh pressure hydrogen pressure testing system, includes the hydrogen input port, the air inlet of first tube coupling first gas cylinder group of hydrogen input port through being provided with first stop valve, the air inlet of second tube coupling second gas cylinder group of gas outlet through being provided with the relief pressure valve of first gas cylinder group, the air inlet of 120MPa hydrogen compressor is passed through to the gas outlet of second gas cylinder group through the third tube coupling, the air inlet of high-pressure gas cylinder group is passed through the fourth tube coupling in the gas outlet of 120MPa hydrogen compressor, the hydrogen access & exit of fifth tube coupling test gas cylinder is passed through to the gas outlet of high-pressure gas cylinder group, the fifth pipeline is still through the sixth tube coupling that is provided with fifth pneumatic ball valve and second check valve first pipeline.
Further, still be provided with the post unit of leaking gas on the first pipeline, the post unit of leaking gas is located first stop valve with between the hydrogen input port, the post unit of leaking gas include along the gas flow direction in proper order establish ties in input stop valve, first filter, second check valve, first manometer and the output stop valve on the first pipeline.
Further, the gas release column unit further comprises a nitrogen purging port and a pressure release port, the nitrogen purging port is connected with one end of a purging pipe, a purging valve is arranged on the purging pipe, the other end of the purging pipe is connected to a node between the input stop valve and the first filter, the pressure release port is respectively connected with one end of an evacuation pipeline, one end of a pressure release pipe and one end of a safety pipeline, the other end of the evacuation pipeline is connected with the first flame arrester, a pressure release valve is arranged on the pressure release pipe, the other end of the pressure release pipe is connected to a node between the second one-way valve and the output stop valve, a first safety valve is arranged on the safety pipeline, and the other end of the safety pipeline is connected to a node between the first filter and the second one-way valve.
Furthermore, the fifth pipeline is also connected with the fourth pipeline through a seventh pipeline, the first pipeline, the second pipeline, the fourth pipeline, the fifth pipeline and the seventh pipeline are all provided with a first pneumatic ball valve and a second stop valve, the first pipeline is also provided with a second filter, the first pneumatic ball valve, the second stop valve and the second filter on the first pipeline are all positioned between the air inlet of the first air cylinder group and the first stop valve, the second pipeline, the fifth pipeline and the sixth pipeline are all provided with a first pressure transmitter, a second pressure gauge is arranged on the second pipeline and the fifth pipeline, a first temperature transmitter is arranged on the third pipeline and the fifth pipeline, and a cooler is also arranged on the third pipeline and is positioned between the air outlet of the second air bottle group and the first temperature transmitter.
Further, a first safety unit is arranged on the second pipeline, second safety units are arranged on the fifth pipeline and the sixth pipeline respectively, the first safety unit and the second safety unit respectively comprise a second safety valve and a second flame arrester which are sequentially connected in series, and the first safety unit further comprises a second pneumatic ball valve which is connected with the second safety valve in parallel.
Furthermore, the fifth pipeline is further connected with one end of an eighth pipeline, the other end of the eighth pipeline is connected to a node between the second check valve and the first pressure transmitter on the sixth pipeline, and a third pneumatic ball valve, a first check valve and a pore plate are sequentially arranged on the eighth pipeline along the gas flowing direction.
Further, the 120MPa hydrogen compressor comprises a diaphragm type compressor and a high-pressure liquid-drive oil-free piston machine which are sequentially connected in series.
Further, the high-pressure gas cylinder group comprises a plurality of high-pressure gas cylinder units connected in parallel, and each high-pressure gas cylinder unit comprises a third stop valve, a high-pressure gas cylinder, a second temperature transmitter, a fourth stop valve, a second pressure transmitter, a third filter and a fourth pneumatic ball valve which are sequentially connected in series along the gas flowing direction.
Further, still be provided with the pressure release unit on the sixth pipeline, the pressure release unit is located fifth pneumatic ball valve with between the second check valve, be provided with the pressure unit on the fifth pipeline, the pressure release unit with the pressure unit all includes the flowmeter and the first electronic flow control valve of establishing ties in proper order, first electronic flow control valve has the electronic flow control valve of second in parallel, the pressure release unit still include with the choke valve of flowmeter series connection.
Further, still be provided with the precooling unit on the fifth pipeline, the precooling unit includes fifth stop valve, third temperature transmitter, first high pressure heat exchanger, fourth temperature transmitter, second high pressure heat exchanger, fifth temperature transmitter, sixth stop valve and the third check valve that establish ties in proper order along the gas flow direction, the precooling unit is located pressurize the unit with between the first temperature transmitter.
The invention has the beneficial effects that: the pressure measuring and testing device is high in pressure testing pressure, a diaphragm type compressor and a high-pressure liquid-drive oil-free piston machine combined pressurization mode is adopted, and the pressurization pressure can reach 120 MPa; the flow meter and the electric flow regulating valve can accurately control the gas quantity of gas filled into and discharged from the test gas cylinder; the output flow is large, and the flow can be output to 200NM3/H under the pressure grade of 120MPa, so that the efficiency of the inflation experiment is greatly improved; the precooling unit can reduce the high temperature generated when high-pressure large-flow gas is instantly filled into the test gas cylinder.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic diagram of an ultrahigh pressure hydrogen pressure test system according to an embodiment of the invention.
In the figure:
1. a first shut-off valve; 2. a first cylinder group; 3. a pressure reducing valve; 4. a second cylinder group; 5. a 120MPa hydrogen compressor; 6. testing the gas cylinder; 7. a first check valve; 8. a gas escape column unit; 9. inputting a stop valve; 10. a first filter; 11. a second one-way valve; 12. a first pressure gauge; 13. an output stop valve; 14. a purge valve; 15. a first flame arrestor; 16. a pressure relief valve; 17. a first safety valve; 18. a first pneumatic ball valve; 19. a second stop valve; 20. a second filter; 21. a first pressure transmitter; 22. a second pressure gauge; 23. a first temperature transmitter; 24. a cooler; 25. a second relief valve; 26. a second flame arrestor; 27. a second pneumatic ball valve; 28. a third pneumatic ball valve; 29. a third stop valve; 30. a high pressure gas cylinder; 31. a second temperature transmitter; 32. a fourth stop valve; 33. a second pressure transmitter; 34. a third filter; 35. a fourth pneumatic ball valve; 36. a fifth pneumatic ball valve; 37. a pressure relief unit; 38. a second one-way valve; 39. a pressurizing unit; 40. a flow meter; 41. a first electric flow regulating valve; 42. a second electric flow regulating valve; 43. a throttle valve; 44. a precooling unit; 45. a fifth stop valve; 46. a third temperature transmitter; 47. a first high pressure heat exchanger; 48. a fourth temperature transmitter; 49. a second high pressure heat exchanger; 50. a fifth temperature transmitter; 51. a sixth stop valve; 52. a third check valve; 53. an orifice plate; 54. a sixth pneumatic ball valve; 55 a fourth one-way valve; 56. a rupture disk; 57. a fifth check valve; 58. a third flame arrestor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
As shown in fig. 1, the ultrahigh-pressure hydrogen pressure test system according to the embodiment of the present invention includes a hydrogen input port, the hydrogen input port is connected to an air inlet of a first gas cylinder group 2 through a first pipeline provided with a first stop valve 1, an air outlet of the first gas cylinder group 2 is connected to an air inlet of a second gas cylinder group 4 through a second pipeline provided with a pressure reducing valve 3, an air outlet of the second gas cylinder group 4 is connected to an air inlet of a 120MPa hydrogen compressor 5 through a third pipeline, an air outlet of the 120MPa hydrogen compressor 5 is connected to an air inlet of a high-pressure gas cylinder group through a fourth pipeline, an air outlet of the high-pressure gas cylinder group is connected to a hydrogen inlet and a hydrogen outlet of a test gas cylinder 6 through a fifth pipeline, and the fifth pipeline is further connected to the first pipeline through a sixth pipeline provided with a fifth pneumatic ball valve 36 and a second check valve 38.
In a specific embodiment of the present invention, a gas release column unit 8 is further disposed on the first pipeline, the gas release column unit 8 is located between the first stop valve 1 and the hydrogen input port, and the gas release column unit 8 includes an input stop valve 9, a first filter 10, a second check valve 11, a first pressure gauge 12, and an output stop valve 13, which are sequentially connected in series on the first pipeline along a gas flow direction.
In one embodiment of the present invention, the air escape pillar unit 8 further comprises a nitrogen purge port and a pressure relief port, the nitrogen purging port is connected with one end of a purging pipe, a purging valve 14 is arranged on the purging pipe, the other end of the purge line is connected to a node between the input cut-off valve 9 and the first filter 10, the pressure relief port is respectively connected with one end of the evacuation pipeline, one end of the pressure relief pipe and one end of the safety pipeline, the other end of the emptying pipeline is connected with a first flame arrester 15, a pressure relief valve 16 is arranged on the pressure relief pipe, the other end of the pressure relief pipe is connected to a node between the second check valve 11 and the output stop valve 13, a first safety valve 17 is provided on the safety line, and the other end of the safety line is connected to a node between the first filter 10 and the second check valve 11.
In a specific embodiment of the present invention, the fifth pipeline is further connected to the fourth pipeline through a seventh pipeline, the first pipeline, the second pipeline, the fourth pipeline, the fifth pipeline and the seventh pipeline are all provided with a first pneumatic ball valve 18 and a second stop valve 19, the first pipeline is further provided with a second filter 20, the first pneumatic ball valve 18, the second stop valve 19 and the second filter 20 on the first pipeline are all located between the air inlet of the first cylinder group 2 and the first stop valve 1, the second pipeline, the fifth pipeline and the sixth pipeline are all provided with a first pressure transmitter 21, the second pipeline and the fifth pipeline are all provided with a second pressure gauge 22, the third pipeline and the fifth pipeline are all provided with a first temperature transmitter 23, the third pipeline is further provided with a cooler 24, the cooler 24 is located between the air outlet of the second gas cylinder group 4 and the first temperature transmitter 23.
In a specific embodiment of the present invention, a first safety unit is disposed on the second pipeline, a second safety unit is disposed on each of the fifth pipeline and the sixth pipeline, each of the first safety unit and the second safety unit comprises a second safety valve 25 and a second flame arrester 26 which are sequentially connected in series, and a second pneumatic ball valve 27 connected in parallel with the second safety valve 25 is further included on the first safety unit.
In a specific embodiment of the present invention, the fifth pipeline is further connected to one end of an eighth pipeline, the other end of the eighth pipeline is connected to a node between the second check valve 38 and the first pressure transmitter 21 on the sixth pipeline, and the eighth pipeline is provided with a third pneumatic ball valve 28, a first check valve 7 and an orifice plate 53 in sequence along the gas flow direction.
In one embodiment of the invention, the 120MPa hydrogen compressor 5 comprises a diaphragm compressor and a high pressure liquid drive oil free piston machine in series.
In a specific embodiment of the present invention, the high pressure gas cylinder group comprises a plurality of high pressure gas cylinder units connected in parallel, and the high pressure gas cylinder units comprise a third stop valve 29, a high pressure gas cylinder 30, a second temperature transmitter 31, a fourth stop valve 32, a second pressure transmitter 33, a third filter 34 and a fourth pneumatic ball valve 35 connected in series in the gas flow direction.
In a specific embodiment of the present invention, a pressure relief unit 37 is further disposed on the sixth pipeline, the pressure relief unit 37 is located between the fifth pneumatic ball valve 36 and the second one-way valve 38, a pressure charging unit 39 is disposed on the fifth pipeline, the pressure relief unit 37 and the pressure charging unit 39 both include a flow meter 40 and a first electric flow regulating valve 41 which are sequentially connected in series, the first electric flow regulating valve 41 is connected in parallel with a second electric flow regulating valve 42, and the pressure relief unit 37 further includes a throttle valve 43 which is connected in series with the flow meter 40.
In a specific embodiment of the present invention, a pre-cooling unit 44 is further disposed on the fifth pipeline, the pre-cooling unit 44 includes a fifth stop valve 45, a third temperature transmitter 46, a first high-pressure heat exchanger 47, a fourth temperature transmitter 48, a second high-pressure heat exchanger 49, a fifth temperature transmitter 50, a sixth stop valve 51, and a third check valve 52, which are sequentially connected in series along a gas flow direction, and the pre-cooling unit 44 is located between the pressurizing unit 39 and the first temperature transmitter 23.
In order to facilitate understanding of the above-described embodiments of the present invention, the following detailed description of the embodiments of the present invention is provided by way of specific usage.
The ultrahigh pressure hydrogen pressure test system comprises a 120MPa hydrogen compressor 5, a flow control unit and a control system.
The 120MPa hydrogen compressor 5 adopts a domestic diaphragm type compressor and an imported high-pressure liquid-driven oil-free piston machine to carry out staged pressurization, and the diaphragm type compressor is a positive displacement compressor and has quite high economic applicability in gas compression application in the field of medium and low pressure. The model of the diaphragm type compressor is GD-200/10-165, the manufacturer is Jiangsu permanent machinery, Inc., the pressurization working condition of the diaphragm type compressor is less than 16MPa, a storage tank is connected in series between the diaphragm type compressor and the high-pressure liquid-drive oil-free piston machine, the storage tank is mainly used for storing the pressurization gas of the diaphragm type compressor to be used as a buffer tank, the working pressure of the storage tank is 20MPa, and the volume is 80L. The model of the high-pressure liquid-drive oil-free piston machine is MC-235-01-YL-2001, the manufacturer is pioneered, the core component of the high-pressure piston compressor unit is a liquid-drive air pump, the liquid-drive air pump consists of a high-pressure compression end, a medium-pressure driving end and a connecting rod between the high-pressure compression end and the medium-pressure driving end, the area of a piston at the high-pressure compression end is small, the area of a piston at the medium-pressure driving end is large, and according to the principle of force balance, the driving end of the liquid-drive air pump is introduced with medium-pressure hydraulic. The 120MPa hydrogen compressor 5 is internally provided with a pressure gauge, a pressure transmitter and relevant valves.
The pressure transmitter is connected with the control system, so that the inlet and outlet pressures of the diaphragm compressor and the high-pressure liquid-drive oil-free piston machine can be monitored in real time and fed back to the control system, and the control system controls the starting and stopping of the 120MPa hydrogen compressor 5.
The flow control unit comprises a pressure relief unit 37 and a pressure charging unit 39, the pressure relief unit 37 and the pressure charging unit 39 both comprise a flow meter 40, a first electric flow regulating valve 41 and a second electric flow regulating valve 42, the flow meter 40 is a 120MPa high-pressure hydrogen special flow meter, the model is Longye BA-1025-A08, the flow meter 40, the first electric flow regulating valve 41 and the second electric flow regulating valve 42 are all connected with a control system, the flow control unit takes a flow value as a control signal, and the flow meter 40, the first electric flow regulating valve 41 and the second electric flow regulating valve 42 can form closed-loop feedback, so that the pressure boosting speed can be dynamically controlled, and further the speed of charging the high-pressure hydrogen into the test gas cylinder 66 and the pressure relief speed of the test gas cylinder 66 are controlled.
The control system comprises a PLC (programmable logic controller), the model of the PLC is Siemens 6ES72881ST300AA0, and the control system is connected with the first pressure transmitter 21, the first temperature transmitter 23, the second pressure transmitter 33, the second temperature transmitter 31, the flowmeter 40, the first electric flow regulating valve 41, the second electric flow regulating valve 42, the third temperature transmitter 46, the fourth temperature transmitter 48, the fifth temperature transmitter 50 and the like. The control system can be used for detecting, storing and controlling various experimental parameters such as pressure parameters, temperature parameters, flow parameters and the like in the ultrahigh-pressure hydrogen pressure test system.
When in specific use: high-pressure hydrogen of 20MPa in the hydrogen trailer is released to the first cylinder group 2 of 20MPa that sets up in the system through hydrogen input port and post unit 8 that loses heart, post unit 8 that loses heart need let in high-purity nitrogen gas in the system through purge valve 14 before using and replace the air in the system, then high-pressure hydrogen in the hydrogen trailer loops through input stop valve 9 in the post unit 8 that loses heart, first filter 10, second check valve 11, output stop valve 13 is carried to the rear end pipeline, it avoids the interior superpressure of post unit 8 to produce danger to lose to set up first relief valve 17 in the post unit 8 that loses heart, first manometer 12 is used for showing the post unit 8 rear end hydrogen pressure value that lets out, 16 when the post unit 8 that loses heart, be used for letting out the high-pressure hydrogen in the post unit 8 that lets out, hydrogen discharges outdoor through first spark arrester 15.
The hydrogen at the rear end of the gas leakage column unit 8 enters the first gas cylinder group 2 in the system through the first stop valve 1, the first pneumatic ball valve 18, the second filter 20 and the second stop valve 19 to be used as a hydrogen gas source. The second safety valve 25 and the second pneumatic ball valve 27 are arranged at the rear end of the first gas cylinder group 2 and used for emergently discharging hydrogen in the first gas cylinder group 2 when the system is abnormal, and the hydrogen is discharged to the outside through the second flame arrester 26.
The rear end of the first gas cylinder group 2 is provided with a first pressure transmitter 21, a second stop valve 19, a second pressure gauge 22, a first pneumatic ball valve 18 and a pressure reducing valve 3, so that the hydrogen source in the first gas cylinder group 2 is reduced to 1MPa and stored in a second gas cylinder group 4 with 20MPa to serve as an air inlet source of the 120MPa hydrogen compressor 5, a cooler 24 and a first temperature transmitter 23 are arranged between the second gas cylinder group 4 and the 120MPa hydrogen compressor 5, the cooler 24 is used for reducing the temperature of the air inlet source of the 120MPa hydrogen compressor 5, and the air storage temperature of the 120MPa hydrogen compressor 5 is indirectly reduced.
The 120MPa hydrogen compressor 5 is used for outputting the low-pressure hydrogen with the pressure of 1MPa after rated pressurization to 120MPa, the discharge capacity can reach 200NM3/H, and the high-pressure hydrogen is filled into the high-pressure gas cylinder group through the second stop valve 19, the first pneumatic ball valve 18 and the second stop valve 19.
The high-pressure gas cylinder group is formed by connecting six high-pressure gas cylinder units in parallel, each high-pressure gas cylinder unit is formed by a third stop valve 29, a high-pressure gas cylinder 30, a second temperature transmitter 31, a fourth stop valve 32, a second pressure transmitter 33, a third filter 34 and a fourth pneumatic ball valve 35, the temperature in the high-pressure gas cylinder group can be collected through the second temperature transmitter 31, the pressure in the high-pressure gas cylinder group is collected through the second pressure transmitter 33, the third stop valve 29, the fourth stop valve 32 and the fourth pneumatic ball valve 35 are used for controlling the on-off of the high-pressure gas cylinder units, and the third filter 34 ensures the quality of gas output by the high-pressure gas cylinder group.
Outlets of the six high-pressure gas cylinder units are gathered into a total output path (namely a fifth pipeline), a second stop valve 19, a second pressure gauge 22, a second safety valve 25 and a first pneumatic ball valve 18 are arranged on the total output path, the second safety valve 25 is connected with a second flame arrester 26 and used for discharging hydrogen outdoors, the hydrogen in the fifth pipeline passes through a pressurizing unit 39 and a precooling unit 44 and then is filled into the test gas cylinder 6, the pressurizing unit 39 comprises a flowmeter 40, a first electric flow regulating valve 41 and a second electric flow regulating valve 42, and the 120MPa high-pressure hydrogen enters the precooling unit 44 after passing through the pressurizing unit 39 and then is filled into the test gas cylinder 6 to cool the high-temperature hydrogen to a lower temperature. The pre-cooling unit 44 mainly comprises a first high-pressure heat exchanger 47 and a second high-pressure heat exchanger 49, and is assisted by a fifth stop valve 45, a sixth stop valve 51, a third check valve 52, a third temperature transmitter 46, a fourth temperature transmitter 48, a fifth temperature transmitter 50 and the like, the cooled high-pressure hydrogen passes through the first pneumatic ball valve 18 and the second stop valve 19 and then is introduced into the test gas cylinder 6, and a first pressure transmitter 21 and a first temperature transmitter 23 are arranged at a hydrogen gas inlet and outlet of the test gas cylinder 6 and used for acquiring a pressure value and a temperature value of the hydrogen gas at the hydrogen gas inlet and outlet.
After the test gas cylinder 6 is filled to the rated pressure, high-pressure hydrogen in the test gas cylinder 6 needs to be discharged to the first gas cylinder group 2 at a certain speed, so that a pressure charging-reducing pressure circulation experiment (namely a hydrogen circulation experiment) of the test gas cylinder 6 is realized. A fifth pneumatic ball valve 36 and a pressure relief unit 37 are arranged on the relief pipeline (i.e., the sixth pipeline), and a flow meter 40, a first electric flow control valve 41, a second electric flow control valve 42 and a throttle valve 43 are arranged in the pressure relief unit 37. The pressure relief unit 37 mainly functions to control the pressure relief rate of the high-pressure hydrogen in the test gas cylinder 6 through a first electric flow control valve 41 and a second electric flow control valve 42, a second one-way valve 38, a second safety valve 25 and a first pressure transmitter 21 are arranged at the rear end of the pressure relief unit, and a relief pipeline is connected with the first gas cylinder group 2.
In order to meet the requirement that the test gas cylinder 6 performs a hydrogen circulation experiment in a high-low temperature experiment environment, the test gas cylinder 6 is placed in an environment box, the environment box can provide a high-low temperature environment of-45 to 85 ℃, a rupture disc 56, a fifth one-way valve 57 and a third flame arrester 58 are arranged on the environment box, and when the test gas cylinder 6 fails, high-pressure is generated and is discharged outdoors after passing through the rupture disc 56, the fifth one-way valve 57 and the third flame arrester 58.
The test gas cylinder 6 can also rapidly discharge the high-pressure hydrogen in the test gas cylinder 6 to the first gas cylinder group 2 through an eighth pipeline, and the eighth pipeline is sequentially provided with a third pneumatic ball valve 28, a first check valve 7 and a pore plate 53.
The fifth pipeline is also connected with one end of a ninth pipeline, the other end of the ninth pipeline is connected between the first check valve 7 and the orifice plate 53 on the eighth pipeline, and a sixth pneumatic ball valve 54 and a fourth check valve 55 are sequentially arranged on the ninth pipeline. The ninth line is used to quickly bleed high-pressure hydrogen gas that has not passed through the pressurizing unit 39 and the pre-cooler unit 44 into the eighth line.
The first temperature transmitter 23, the second temperature transmitter 31, the third temperature transmitter 46, the fourth temperature transmitter 48 and the fifth temperature transmitter 50 may be of the type SENEX ST-WZPB-043 or Okazaki T99.
The types of the first pressure transmitter 21 and the second pressure transmitter 33 can be SENEX DG1300-GY-B-2-160/GE/SZ/CQ/CD5/GZ, and also can be SENEX DG1300-GY-B-2-40/AM/GE/SZ/CQ/CD 5/GZ.
The pneumatic ball valves include a first pneumatic ball valve 18, a second pneumatic ball valve 27, a third pneumatic ball valve 28, a fourth pneumatic ball valve 35, a fifth pneumatic ball valve 36, and a sixth pneumatic ball valve 54. The pneumatic ball valve is used for realizing automatic control of on-off of a pipeline, the pneumatic ball valve is connected with compressed air through a pipeline provided with an electromagnetic valve, the electromagnetic valve is connected with a control system through a line provided with a relay, the model of the electromagnetic valve is 3V210-08-NC (explosion-proof), and the model of the relay is RXM4AB2P7+ RXZE.
In summary, by means of the above technical scheme of the present invention, a diaphragm compressor and a high-pressure liquid-drive oil-free piston machine can be adopted to perform two-stage compression, so as to nominally pressurize the low-pressure hydrogen to 120MPa high-pressure, and simultaneously ensure that the flow rate is not lower than 200NM3/H, the 120MPa high-pressure hydrogen can be pressurized and decompressed into the test cylinder at nominal pressurization and decompression rates through the pressurization unit and the decompression unit, so as to realize a hydrogen circulation experiment of the test cylinder, and the present invention can be widely used in scientific research institutions, special equipment detection institutions, hydrogen cylinder manufacturers and hydrogen fuel automobile manufacturers; the precooling unit can be adopted to reduce the high temperature generated when high-pressure large-flow gas is instantly filled into the test gas cylinder.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An ultrahigh pressure hydrogen pressure test system comprises a hydrogen input port, the hydrogen input port is connected with an air inlet of a first air cylinder group (2) through a first pipeline provided with a first stop valve (1), the air outlet of the first air bottle group (2) is connected with the air inlet of the second air bottle group (4) through a second pipeline provided with a pressure reducing valve (3), it is characterized in that the air outlet of the second air bottle group (4) is connected with the air inlet of a 120MPa hydrogen compressor (5) through a third pipeline, the air outlet of the 120MPa hydrogen compressor (5) is connected with the air inlet of the high-pressure air bottle group through a fourth pipeline, the gas outlet of the high-pressure gas cylinder group is connected with the hydrogen inlet and outlet of the test gas cylinder (6) through a fifth pipeline, the fifth pipeline is also connected with the first pipeline through a sixth pipeline provided with a fifth pneumatic ball valve (36) and a second one-way valve (38).
2. The ultrahigh-pressure hydrogen pressure test system according to claim 1, wherein a gas release column unit (8) is further arranged on the first pipeline, the gas release column unit (8) is located between the first stop valve (1) and the hydrogen input port, and the gas release column unit (8) comprises an input stop valve (9), a first filter (10), a second check valve (11), a first pressure gauge (12) and an output stop valve (13) which are sequentially connected in series on the first pipeline along the gas flow direction.
3. The ultrahigh-pressure hydrogen pressure test system according to claim 2, wherein the gas release column unit (8) further comprises a nitrogen purging port and a pressure release port, the nitrogen purging port is connected with one end of a purging pipe, the purging pipe is provided with a purging valve (14), the other end of the purging pipe is connected with a node between the input stop valve (9) and the first filter (10), the pressure release port is respectively connected with one end of an evacuation pipeline, one end of a pressure release pipe and one end of a safety pipeline, the other end of the evacuation pipeline is connected with a first flame arrester (15), the pressure release pipe is provided with a pressure release valve (16), the other end of the pressure release pipe is connected with a node between the second one-way valve (11) and the output stop valve (13), the safety pipeline is provided with a first safety valve (17), and the other end of the safety pipeline is connected with a node between the first filter (10) and the second one-way valve (11) And (4) pointing up.
4. The ultrahigh-pressure hydrogen pressure test system according to claim 1, wherein the fifth pipeline is further connected with the fourth pipeline through a seventh pipeline, the first pipeline, the second pipeline, the fourth pipeline, the fifth pipeline and the seventh pipeline are all provided with a first pneumatic ball valve (18) and a second stop valve (19), the first pipeline is further provided with a second filter (20), the first pneumatic ball valve (18), the second stop valve (19) and the second filter (20) on the first pipeline are all located between an air inlet of the first cylinder group (2) and the first stop valve (1), the second pipeline, the fifth pipeline and the sixth pipeline are all provided with a first pressure transmitter (21), and the second pipeline and the fifth pipeline are all provided with a second pressure gauge (22), the third pipeline with all be provided with first temperature transmitter (23) on the fifth pipeline, still be provided with cooler (24) on the third pipeline, cooler (24) are located the gas outlet of second gas bottle group (4) with between first temperature transmitter (23).
5. The ultrahigh-pressure hydrogen pressure test system according to claim 1, wherein a first safety unit is arranged on the second pipeline, a second safety unit is arranged on each of the fifth pipeline and the sixth pipeline, each of the first safety unit and the second safety unit comprises a second safety valve (25) and a second flame arrester (26) which are sequentially connected in series, and a second pneumatic ball valve (27) connected with the second safety valve (25) in parallel is further arranged on the first safety unit.
6. The ultrahigh-pressure hydrogen pressure test system according to claim 4, wherein the fifth pipeline is further connected with one end of an eighth pipeline, the other end of the eighth pipeline is connected to a node between the second check valve (38) and the first pressure transmitter (21) on the sixth pipeline, and a third pneumatic ball valve (28), a first check valve (7) and a pore plate (53) are sequentially arranged on the eighth pipeline along the gas flow direction.
7. The ultrahigh-pressure hydrogen pressure test system according to claim 1, wherein the 120MPa hydrogen compressor (5) comprises a diaphragm compressor and a high-pressure liquid-drive oil-free piston machine which are connected in series in sequence.
8. The ultrahigh-pressure hydrogen pressure test system according to claim 1, wherein the high-pressure gas cylinder group comprises a plurality of high-pressure gas cylinder units connected in parallel, and each high-pressure gas cylinder unit comprises a third stop valve (29), a high-pressure gas cylinder (30), a second temperature transmitter (31), a fourth stop valve (32), a second pressure transmitter (33), a third filter (34) and a fourth pneumatic ball valve (35) which are sequentially connected in series along the gas flow direction.
9. The ultrahigh-pressure hydrogen pressure test system according to claim 4, wherein a pressure relief unit (37) is further arranged on the sixth pipeline, the pressure relief unit (37) is located between the fifth pneumatic ball valve (36) and the second one-way valve (38), a pressure charging unit (39) is arranged on the fifth pipeline, the pressure relief unit (37) and the pressure charging unit (39) both comprise a flow meter (40) and a first electric flow regulating valve (41) which are sequentially connected in series, the first electric flow regulating valve (41) is connected in parallel with a second electric flow regulating valve (42), and the pressure relief unit (37) further comprises a throttle valve (43) which is connected in series with the flow meter (40).
10. The ultrahigh-pressure hydrogen pressure test system according to claim 9, wherein a precooling unit (44) is further arranged on the fifth pipeline, the precooling unit (44) comprises a fifth stop valve (45), a third temperature transmitter (46), a first high-pressure heat exchanger (47), a fourth temperature transmitter (48), a second high-pressure heat exchanger (49), a fifth temperature transmitter (50), a sixth stop valve (51) and a third check valve (52) which are sequentially connected in series along the gas flowing direction, and the precooling unit (44) is located between the pressurizing unit (39) and the first temperature transmitter (23).
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