CN114199551B - High-speed flow impact testing device and method for high-pressure one-way valve - Google Patents
High-speed flow impact testing device and method for high-pressure one-way valve Download PDFInfo
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- CN114199551B CN114199551B CN202111388533.8A CN202111388533A CN114199551B CN 114199551 B CN114199551 B CN 114199551B CN 202111388533 A CN202111388533 A CN 202111388533A CN 114199551 B CN114199551 B CN 114199551B
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000009863 impact test Methods 0.000 title claims abstract description 26
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 48
- 238000012360 testing method Methods 0.000 claims abstract description 47
- 230000008859 change Effects 0.000 claims abstract description 19
- 230000008569 process Effects 0.000 claims abstract description 19
- 230000001052 transient effect Effects 0.000 claims abstract description 9
- 230000009467 reduction Effects 0.000 claims abstract description 3
- 239000007789 gas Substances 0.000 claims description 59
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 22
- 229910052739 hydrogen Inorganic materials 0.000 claims description 22
- 239000001257 hydrogen Substances 0.000 claims description 22
- 238000002474 experimental method Methods 0.000 claims description 7
- 238000005984 hydrogenation reaction Methods 0.000 claims description 3
- 238000011160 research Methods 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
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- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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Abstract
The invention discloses a high-speed flow impact testing device and method for a high-pressure one-way valve, and belongs to valve impact testing. In the device, high-pressure gas of a high-pressure gas bottle reaches test pressure after being subjected to two-stage pressure reduction through a first-stage pressure reducer and a second-stage pressure reducer, and then is stored in a preceding-stage buffer tank; the back pressure high-pressure gas cylinder provides constant back pressure through the pressure reducer, so that stable pressure difference is formed before and after the check valve to be detected; when the high-speed electromagnetic valve is opened, the front-stage buffer tank outputs high-speed airflow with constant pressure to impact the check valve to be tested, and the four pressure sensors simultaneously monitor front and rear pressure data of the check valve to be tested, so that the pressure change of the whole opening process of the check valve to be tested after the impact is applied is obtained, and the test of the high-speed flowing impact of the check valve to be tested is realized. The testing device is safe and stable, can test and obtain the pressure change of the high-pressure one-way valve in the whole opening process, thereby obtaining the transient opening characteristic of the high-pressure one-way valve, and can also carry out high-speed flow impact testing on the one-way valve under different inlet pressures and different back pressures.
Description
Technical Field
The invention belongs to the field of valve impact testing, and particularly relates to a high-speed flow impact testing device and method for a high-pressure one-way valve.
Background
Since the second industrial revolution, the energy crisis is becoming more and more obvious, and clean and economic new energy is urgently needed. Hydrogen energy is an ideal secondary energy source due to its advantages of cleanliness, high efficiency, zero carbon, sustainable utilization and the like, and the development of hydrogen energy has become a common consensus of countries all over the world. China pays great attention to the hydrogen energy industry, 62 relevant hydrogen energy industry policies are issued by governments at all levels in China in 2020, 128 hydrogenation stations are constructed by the nationwide at the end of the year, and the quantity of fuel cell vehicles is 7352. However, the high-speed development of the hydrogen energy industry has brought about an increase in safety risks that cannot be ignored.
The safety problem of the hydrogen station is resistance in the construction and operation of the hydrogen station, and the hydrogen station has been leaked and exploded for many times in history. Statistics show that over 20% of hydroprocessing station accidents in the united states are valve shock failures leading to hydrogen leak explosions. Meanwhile, the technical department 'renewable energy and hydrogen energy technology' key special project application guidelines indicate that corresponding safety performance testing technology and equipment research are developed aiming at the problems of leakage, breakage and the like of key parts of a hydrogen station. The accident statistical analysis shows that the high-pressure hydrogen pipeline check valve can cause great impact damage to the valve in the hydrogen filling process. Under the impact action, the one-way valve can be quickly opened, so that the speed field and the temperature field of the transient pressure field are complex and changeable in the opening process of the valve, and the upper surface and the lower surface of the valve core are subjected to differential pressure resistance, so that the valve core generates larger acceleration, speed and kinetic energy to impact the limiting seat and the spring, and the valve core is easy to generate impact fracture failure. Therefore, the research on the impact problem in the valve opening process has very important significance on the construction and safe operation of the hydrogen station.
Disclosure of Invention
Aiming at the defects or the improvement requirements in the prior art, the invention provides a high-speed flow impact testing device and method for a high-pressure one-way valve, and aims to provide a set of testing device and method which are flexible and changeable, widely applicable and capable of obtaining the transient opening characteristic of the valve aiming at the impact problem in the opening process of the valve so as to provide support and guarantee for the safe operation of a hydrogen filling station.
In order to achieve the above object, according to one aspect of the present invention, there is provided a high-pressure check valve high-speed flow impact testing apparatus for high-speed flow impact testing of a check valve to be tested, including a high-pressure gas source unit, a gas buffer unit, an experiment testing unit and a signal acquisition control unit, wherein:
the high-pressure gas source unit comprises a high-pressure gas cylinder, a primary pressure reducer and a secondary pressure reducer; the gas buffer unit comprises a front-stage buffer tank, a rear-stage buffer tank, a back pressure reducer and a back pressure high-pressure gas cylinder; the experimental test unit comprises a high-speed electromagnetic valve and a plurality of pressure sensors; the signal acquisition control unit comprises a high-speed signal acquisition instrument and a signal controller;
the high-pressure gas cylinder, the primary pressure reducer, the secondary pressure reducer, the backing stage buffer tank and the high-speed electromagnetic valve are sequentially connected in series; the outlet of the high-speed electromagnetic valve is used for being connected with the air inlet of the one-way valve to be tested during testing; the air inlet of the rear-stage buffer tank is used for connecting the outlet of the one-way valve to be tested during the test; the outlet of the backpressure high-pressure gas cylinder is connected with a backpressure reducer, and the outlet of the backpressure reducer is used for being connected with the outlet of the one-way valve to be tested during testing; two pressure sensors are arranged between the high-speed electromagnetic valve and the check valve to be detected at intervals; two pressure sensors are arranged between the rear-stage buffer tank and the one-way valve to be detected at intervals; the high-speed signal acquisition instrument is connected with the pressure sensor to record the change of pressure along with time; the signal controller is connected with the high-speed electromagnetic valve; the opening time of the high-speed electromagnetic valve is shorter than that of the one-way valve to be tested under the high-speed flow impact; wherein,
the high-speed electromagnetic valve is initially in a closed state, high-pressure gas of the high-pressure gas cylinder reaches test pressure after two-stage pressure reduction through the first-stage pressure reducer and the second-stage pressure reducer, and then is stored in the front-stage buffer tank; the high-pressure gas cylinder provides constant back pressure through the pressure reducer, so that stable pressure difference is formed before and after the check valve to be detected; when the high-speed electromagnetic valve is opened, the front-stage buffer tank outputs high-speed airflow with constant pressure to impact the check valve to be tested, and the four pressure sensors simultaneously monitor front and rear pressure data of the check valve to be tested, so that the pressure change of the whole opening process of the check valve to be tested after the impact is applied is obtained, and the test of the high-speed flowing impact of the check valve to be tested is realized.
Furthermore, the opening time of the high-speed electromagnetic valve is microsecond level and is far shorter than the opening time of the one-way valve to be tested under the high-speed flow impact.
Further, the high-pressure gas cylinder comprises at least two gas cylinders, and the opening and the closing of each gas cylinder are independent.
Further, the preceding stage buffer tank comprises at least two buffer tanks, and the opening and closing of each buffer tank are independent.
Furthermore, a third pressure sensor and a fourth pressure sensor are sequentially arranged between the high-speed electromagnetic valve and the check valve to be tested; a fifth pressure sensor and a sixth pressure sensor are sequentially arranged between the rear-stage buffer tank and the one-way valve to be detected; and the minimum distance which does not influence the stability of the airflow is taken as the distance between the fourth pressure sensor and the fifth pressure sensor and the to-be-detected one-way valve.
Furthermore, a third pressure sensor, a fourth pressure sensor, a valve core of the check valve to be tested, a fifth pressure sensor and a sixth pressure sensor are sequentially arranged at equal intervals.
Further, the device also comprises a safe emptying unit; the safety emptying unit is divided into two parts, one part is arranged between the second-stage pressure reducer and the backing stage buffer tank and comprises a first manual emptying valve, a safety valve and a first electromagnetic emptying valve; the other part is arranged at the tail end of an exhaust gas path of the one-way valve to be tested and comprises a second manual emptying valve and a second electromagnetic emptying valve.
To achieve the above object, according to another aspect of the present invention, there is provided a high-pressure check valve high-speed flow impact testing method, which is implemented by using the high-pressure check valve high-speed flow impact testing apparatus as described in any one of the preceding items, and the testing process is as follows:
the test pressure is adjusted to a specified value through the first-stage pressure reducer and the second-stage pressure reducer, and the back pressure is adjusted to the specified value through the back pressure reducer;
opening a preceding stage buffer tank and a high-pressure gas cylinder, opening an electromagnetic valve through a signal controller after pressure values in front of and behind a to-be-tested one-way valve reach a set value and are stable, impacting the to-be-tested one-way valve by high-speed airflow, and simultaneously recording the whole process pressure change of the to-be-tested one-way valve from the impact of the airflow to the complete opening by four pressure sensors;
and analyzing the change curves of the pressure obtained by the four pressure sensors along with the time to obtain the transient opening characteristic of the check valve to be tested.
Further, the transient opening characteristic includes an opening time and a minimum opening pressure.
In general, compared with the prior art, the above technical solution conceived by the present invention can achieve the following beneficial effects:
1. the invention designs a high-pressure one-way valve high-speed flow impact testing device capable of freely regulating and controlling front and back pressure aiming at complex operation conditions of a high-pressure one-way valve. The high-speed flow impact testing device for the high-pressure one-way valve can accurately test the whole process that the high-pressure one-way valve is quickly opened when being impacted by high-speed airflow under different pressure working conditions, has the advantages of simplicity in operation, safety, stability and the like, can provide an impact testing platform for the high-pressure one-way valve, and provides guarantee for long-term stable operation of a valve of a hydrogenation station.
2. The invention is provided with the microsecond-level high-speed electromagnetic valve and the signal acquisition instrument, can measure the pressure change of the check valve in the whole process of being opened by high-speed airflow impact, and utilizes the characteristic that the opening time of the microsecond-level high-speed electromagnetic valve is far shorter than that of the check valve to be measured, thereby reducing the pressure difference caused by airflow delay, ensuring that the set pressure is reached when the airflow impacts the check valve, and improving the test accuracy.
3. Because single gas cylinder tolerance is limited, the time of maintaining stable test pressure is shorter, set up a plurality of gas cylinders and can guarantee on the one hand to provide stable pressure air supply, maintain going on and many times experiment of experiment, on the other hand can reduce the gas cylinder and change the number of times, convenient operation. The arrangement of a plurality of buffer tanks is the same.
4. The minimum distance which does not influence the stability of the air flow is taken as the distance between the fourth pressure sensor and the fifth pressure sensor and the one-way valve to be detected, and the transient opening characteristic of the one-way valve to be detected can be more accurately characterized.
5. The third pressure sensor, the fourth pressure sensor, the one-way valve to be measured, the fifth pressure sensor and the sixth pressure sensor are arranged at equal intervals, and the opening time of the one-way valve to be measured can be quickly estimated simply by subtracting the pressure response time.
Drawings
Fig. 1 is a schematic view of a high-pressure check valve high-speed flow impact testing device according to a preferred embodiment of the invention. The same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein:
1-a high-pressure gas cylinder, 2-a gas cylinder stop valve, 3-a first pressure reducer, 4-a first stop valve, 5-a first pressure gauge, 6-a first pressure sensor, 7-a second pressure reducer, 8-a second pressure gauge, 9-a second pressure sensor, 10-a first manual emptying valve, 11-a safety valve, 12-a first electromagnetic emptying valve, 13-a first one-way valve, 14-a first ball valve, 15-a first pressure buffer tank, 16-a second ball valve, 17-a second pressure buffer tank, 18-a high-speed electromagnetic valve, 19-a third pressure sensor, 20-a fourth pressure sensor, 21-a one-way valve to be tested, 22-a fifth pressure sensor, 23-a sixth pressure sensor, 24-a third pressure buffer tank, 25-a third pressure buffer tank, 26-a second one-way electromagnetic valve, 27-a fourth ball valve, 28-a backpressure reducer, 29-a high-pressure gas cylinder, 30-a third pressure gauge, 31-a seventh pressure sensor, 32-a second manual emptying valve, and 33-a second electromagnetic emptying valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention. In addition, the technical features involved in the respective embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The embodiment discloses a high-speed flow impact testing device of a preferred high-pressure check valve, which comprises the following working contents: the front and rear pressures of the test check valve are freely adjusted through a gas buffer device; controlling the high-speed airflow impact one-way valve through the electromagnetic valve; monitoring the pressure change of the one-way valve in the whole process of opening under the impact of high-speed airflow through a high-speed signal acquisition unit; the safe and stable operation of the testing device is ensured through the safe emptying unit. Preferably, the structure of the device is as shown in fig. 1, and the device mainly comprises a high-pressure gas source unit, a gas buffer unit, an experimental test unit, a signal acquisition control unit and a safety emptying unit. The high-pressure gas reaches the test pressure after being decompressed by the first-stage decompressor 3 and the second-stage decompressor 7 and is stored in a front-stage buffer tank (in the embodiment, the first pressure buffer tank 15 and the second pressure buffer tank 17), a backpressure high-pressure gas bottle 29 behind the test section provides constant backpressure through a backpressure decompressor 28, so that a stable pressure difference is formed in front of and behind a test unit, a high-speed electromagnetic valve 18 is opened, the high-speed gas flow impacts a test check valve, a pressure sensor simultaneously monitors pressure data in front of and behind the valve, the pressure change of the whole opening process after the check valve is impacted is recorded, and the test of high-speed flow impact of the high-pressure check valve is realized.
Preferably, the high pressure gas source unit comprises a total of a-J10 cylinders 1, in this embodiment, each provided with a separate cylinder shut-off valve 2. The first-stage pressure reducer 3 is used for reducing pressure for the first time, the first stop valve 4 is used for controlling the opening and closing of the whole pipeline, the first pressure gauge 5 and the first pressure sensor 6 are used for measuring whether the pressure in the current pipeline is reduced to the pressure set by the first-stage pressure reducer 3, the second-stage pressure reducer 7 is used for reducing pressure for the second time, and the second pressure gauge 8 and the second pressure sensor 9 are used for measuring whether the pressure in the pipeline reaches the pressure set by the second-stage pressure reducer 7. Because single gas cylinder tolerance is limited, the time of maintaining stable test pressure is shorter, sets up a plurality of gas cylinders and can guarantee on the one hand to provide stable pressure air supply, maintains going on and many times of experiment, and on the other hand can reduce the gas cylinder and change the number of times, convenient operation. Different numbers of air cylinders can be arranged according to the capacity of the air cylinders and the test time in different embodiments.
Preferably, the gas buffer unit is divided into two parts, the first part is a front-stage buffer tank before the test unit, the embodiment mainly comprises a first pressure buffer tank 15 and a second pressure buffer tank 17, the two buffer tanks are provided with a first ball valve 14 and a second ball valve 16 to control the opening and closing of the buffer tanks, and the part can receive high-pressure gas after decompression and output stable high-speed gas flow during experimental test; the second part is behind the test unit and mainly comprises a third buffer tank 25 (namely a back-stage buffer tank) and a backpressure high-pressure gas cylinder 29, the gas in the backpressure high-pressure gas cylinder is decompressed by a backpressure decompressor 28 to obtain backpressure required by the test, a fourth ball valve 27 controls the opening and closing of a pipeline of the buffer tank, and a second one-way valve 26 prevents the gas from flowing back into the high-pressure gas cylinder.
Preferably, the experimental test unit comprises a high-speed electromagnetic valve 18, a third pressure sensor 19, a fourth pressure sensor 20, a fifth pressure sensor 22, a sixth pressure sensor 23 and a check valve 21 to be tested, the opening time of the high-speed electromagnetic valve 18 reaches microsecond level and is far shorter than the opening time of the check valve under high-pressure impact, so that the set pressure can be ensured when the air flow impacts the check valve, and the four pressure sensors are arranged in front of and behind the test check valve and used for monitoring the pressure change of the whole process of opening the check valve under the impact of the high-speed air flow.
The signal acquisition control unit comprises a high-speed signal acquisition instrument and a signal controller, the signal acquisition instrument can convert signals of the first pressure sensor 6, the second pressure sensor 9, the third pressure sensor 19, the fourth pressure sensor 20, the fifth pressure sensor 22, the sixth pressure sensor 23 and the seventh pressure sensor 31 into digital signals and display the digital signals in real time, and the signal controller can control the opening and closing of the first electromagnetic emptying valve 12, the high-speed electromagnetic valve 18 and the second electromagnetic emptying valve 33.
Preferably, the safety evacuation unit is divided into two parts, one part is arranged behind the second-stage pressure reducer 7 and mainly comprises a first manual evacuation valve 10, a safety valve 11 and a first electromagnetic evacuation valve 12, and a first one-way valve 13 is arranged to avoid backflow; the second part is arranged at the end of the experimental testing device and mainly comprises a second manual emptying valve 32 and a second electromagnetic emptying valve 33.
In a specific application example, the high-speed flow impact testing device of the high-pressure check valve has the specific working procedures that:
before the experiment begins, whether the first manual emptying valve 10, the second manual emptying valve 32 and the safety valve 11 are normal or not is checked, the power supply is switched on, whether the first electromagnetic emptying valve 12 and the second electromagnetic emptying valve 33 can be normally opened or not is checked through the signal controller, whether the electromagnetic valve 18 is in a closed state or not is checked, and whether the pressure at each monitoring point is zero or not is checked through the first pressure gauge 5, the second pressure gauge 8, the first pressure sensor 6, the second pressure sensor 9, the third pressure sensor 19, the fourth pressure sensor 20, the fifth pressure sensor 22, the sixth pressure sensor 23 and the seventh pressure sensor 31.
After the check is normal, the upper limit of the test pressure is set through the first-stage pressure reducer 3, the pressure required to be reached before the check valve to be detected is set through the second-stage pressure reducer 7, and the back pressure required to be reached after the check valve to be detected is set through the back pressure reducer 28. The first ball valve 14 and the second ball valve 16 of the first buffer tank 15 and the second buffer tank 17 are opened, the gas cylinder stop valves 2 of the gas cylinders A-J are opened, the first stop valve 8 is opened, after the readings of the second pressure sensor 9 and the first pressure sensor 6 are stable, whether the pressure values of the first pressure gauge 5 and the first pressure sensor 6 are the pressure set by the primary pressure reducer 3 or not is checked, and whether the pressure values of the second pressure gauge 8 and the second pressure sensor 9 are the pressure set by the secondary pressure reducer 7 or not is checked. The third ball valve 24 of the third buffer tank 25 is opened, the fourth ball valve 27 is opened, and at this time, the fifth pressure sensor 22 and the sixth pressure sensor 23 display data, and after the values are stabilized, whether the values are the pressure values set by the back pressure reducer 28 is checked.
After the pressure values before and after the check valve 21 to be tested reach the set value and are stable, the high-speed electromagnetic valve 18 is opened through the signal controller, high-speed airflow impacts the check valve 21 to be tested, and meanwhile, the pressure sensors, namely the third pressure sensor 19, the fourth pressure sensor 20, the fifth pressure sensor 22 and the sixth pressure sensor 23, record the pressure change of the whole process from the impact of the airflow to the complete opening of the check valve to be tested.
After the test is finished, the high-speed electromagnetic valve 18 is closed, the gas cylinder stop valves 2 are closed, the first stop valve 4 is closed, the first ball valve 14, the second ball valve 16, the third ball valve 24 and the fourth ball valve 27 are closed, the high-speed electromagnetic valve 18 and the second electromagnetic exhaust valve 33 are opened, gas in the pipeline is exhausted, and after the readings of the third pressure gauge 30 and the seventh pressure sensor 31 are zero, the high-speed electromagnetic valve 18 and the second electromagnetic exhaust valve 33 are closed. And cutting off the power supply and finishing the test.
The transient opening characteristics of the check valve 21 to be tested, including the opening time, the minimum opening pressure and the like, can be obtained by analyzing the pressure change curves obtained by the third pressure sensor 19, the fourth pressure sensor 20, the fifth pressure sensor 22 and the sixth pressure sensor 23.
By changing the pressure values set by the first-stage pressure reducer 3, the second-stage pressure reducer 7 and the backpressure reducer 28 before the start of the experiment and observing the pressure change curve of the check valve 21 to be tested under different inlet and outlet pressures, the research on the influence of the inlet and outlet pressures on the high-speed flow impact process of the high-pressure check valve can be realized, namely the research on the influence of different working conditions of the hydrogen station on the high-speed flow impact process of the high-pressure check valve can be realized.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. The utility model provides a high-speed impact testing arrangement that flows of high pressure check valve of hydrogenation station for the high-speed impact test that flows of check valve (21) that awaits measuring, its characterized in that includes high-pressure gas source unit, gaseous buffer unit, experiment test unit and signal acquisition control unit, wherein:
the high-pressure gas source unit comprises a high-pressure gas cylinder (1), a primary pressure reducer (3) and a secondary pressure reducer (7); the gas buffer unit comprises a front-stage buffer tank, a rear-stage buffer tank, a back pressure reducer (28) and a back pressure high-pressure gas cylinder (29); the experimental test unit comprises a high-speed electromagnetic valve (18) and a plurality of pressure sensors; the signal acquisition control unit comprises a high-speed signal acquisition instrument and a signal controller;
the high-pressure gas cylinder (1), the first-stage pressure reducer (3), the second-stage pressure reducer (7), the preceding-stage buffer tank and the high-speed electromagnetic valve (18) are sequentially connected in series; the outlet of the high-speed electromagnetic valve (18) is used for connecting the air inlet of the one-way valve (21) to be tested during the test; the air inlet of the rear-stage buffer tank is used for connecting the outlet of the check valve (21) to be tested during the test; the outlet of the back pressure high-pressure gas bottle (29) is connected with a back pressure reducer (28), and the outlet of the back pressure reducer (28) is used for being connected with the outlet of the to-be-tested one-way valve (21) during testing; a third pressure sensor (19) and a fourth pressure sensor (20) are sequentially arranged between the high-speed electromagnetic valve (18) and the check valve (21) to be tested; a fifth pressure sensor (22) and a sixth pressure sensor (23) are sequentially arranged between the rear-stage buffer tank and the check valve (21) to be detected; the high-speed signal acquisition instrument is connected with the pressure sensor to record the change of pressure along with time; the signal controller is connected with a high-speed electromagnetic valve (18); the opening time of the high-speed electromagnetic valve (18) is shorter than the opening time of the check valve (21) to be tested under the high-speed flow impact; wherein,
the high-speed electromagnetic valve (18) is initially in a closed state, high-pressure gas in the high-pressure gas cylinder (1) reaches test pressure after two-stage pressure reduction through the first-stage pressure reducer (3) and the second-stage pressure reducer (7), and then is stored in the front-stage buffer tank; the back pressure high-pressure gas cylinder (29) provides constant back pressure through the back pressure reducer (28), so that stable pressure difference is formed before and after the check valve (21) to be tested; when the high-speed electromagnetic valve (18) is opened, the front-stage buffer tank outputs high-speed airflow with constant pressure to impact the check valve (21) to be tested, and the four pressure sensors simultaneously monitor the front and rear pressure data of the check valve (21) to be tested, so that the pressure change of the whole opening process of the check valve (21) to be tested after the impact is received is obtained, and the test of the high-speed flow impact of the check valve (21) to be tested is realized;
the minimum distance which does not influence the stability of the airflow is selected from the distances among the fourth pressure sensor (20), the fifth pressure sensor (22) and the check valve (21) to be tested;
the third pressure sensor (19), the fourth pressure sensor (20), the valve core of the check valve (21) to be tested, the fifth pressure sensor (22) and the sixth pressure sensor (23) are sequentially arranged at equal intervals.
2. The high-speed flow impact testing device for the high-pressure check valve of the hydrogen station as claimed in claim 1, wherein the opening time of the high-speed electromagnetic valve (18) is in the microsecond range and is much shorter than the opening time of the check valve (21) to be tested under the impact of the high-speed flow.
3. The high-speed flow impact testing device for the high-pressure one-way valve of the hydrogen station as claimed in claim 1, wherein the high-pressure gas cylinder (1) comprises at least two gas cylinders, and the opening and the closing of each gas cylinder are independent of each other.
4. The high-speed flow impact testing device for the high-pressure one-way valve of the hydrogen station as recited in claim 1, wherein the pre-stage buffer tank comprises at least two buffer tanks (15, 17), and the opening and closing of each buffer tank are independent of each other.
5. The high-speed flow impact testing device for the high-pressure one-way valve of the hydrogen station as claimed in any one of claims 1 to 4, further comprising a safety emptying unit; the safety emptying unit is divided into two parts, one part of the safety emptying unit is arranged between the second-stage pressure reducer (7) and the preceding-stage buffer tank, and the safety emptying unit comprises a first manual emptying valve (10), a safety valve (11) and a first electromagnetic emptying valve (12); the other part is arranged at the tail end of an exhaust gas path of the check valve (21) to be tested and comprises a second manual emptying valve (32) and a second electromagnetic emptying valve (33).
6. A high-speed flow impact test method for a high-pressure one-way valve of a hydrogen station is realized by adopting the high-speed flow impact test device for the high-pressure one-way valve of the hydrogen station, which is disclosed by any one of claims 1 to 5, and is characterized in that the test process is as follows:
the test pressure is adjusted to a specified value through the first-stage pressure reducer (3) and the second-stage pressure reducer (7), and the back pressure is adjusted to a specified value through the back pressure reducer (28);
the method comprises the steps that a preceding-stage buffer tank and a high-pressure gas cylinder (1) are started, after pressure values in front of and behind a to-be-detected one-way valve (21) reach a set value and are stable, a high-speed electromagnetic valve (18) is started through a signal controller, high-speed airflow impacts the to-be-detected one-way valve (21), and meanwhile, the pressure change of the to-be-detected one-way valve (21) in the whole process from the impact of the airflow to the complete opening is recorded through four pressure sensors;
and analyzing the change curves of the pressure obtained by the four pressure sensors along with the time to obtain the transient opening characteristic of the check valve (21) to be tested.
7. The method of claim 6, wherein the transient opening characteristics include opening time and minimum opening pressure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111388533.8A CN114199551B (en) | 2021-11-22 | 2021-11-22 | High-speed flow impact testing device and method for high-pressure one-way valve |
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| CN202111388533.8A CN114199551B (en) | 2021-11-22 | 2021-11-22 | High-speed flow impact testing device and method for high-pressure one-way valve |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4202209A (en) * | 1978-05-26 | 1980-05-13 | E-Systems, Inc. | Shock suppressor valve test system and method |
| CN105699068A (en) * | 2016-04-05 | 2016-06-22 | 杭州市特种设备检测研究院 | Safety valve performance testing and safety valve online calibrator calibrating device |
| CN106197977A (en) * | 2016-07-06 | 2016-12-07 | 公安部天津消防研究所 | Gas extinguishing system high pressure, large-flow check valve action test device and method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4202209A (en) * | 1978-05-26 | 1980-05-13 | E-Systems, Inc. | Shock suppressor valve test system and method |
| CN105699068A (en) * | 2016-04-05 | 2016-06-22 | 杭州市特种设备检测研究院 | Safety valve performance testing and safety valve online calibrator calibrating device |
| CN106197977A (en) * | 2016-07-06 | 2016-12-07 | 公安部天津消防研究所 | Gas extinguishing system high pressure, large-flow check valve action test device and method |
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