CN112179587A - Hydrogen system detection device - Google Patents
Hydrogen system detection device Download PDFInfo
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- CN112179587A CN112179587A CN202011127100.2A CN202011127100A CN112179587A CN 112179587 A CN112179587 A CN 112179587A CN 202011127100 A CN202011127100 A CN 202011127100A CN 112179587 A CN112179587 A CN 112179587A
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- pressure
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- working medium
- assembly
- hydrogen system
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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
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2876—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for valves
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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
- G01M13/00—Testing of machine parts
-
- 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
- G01M13/003—Machine valves
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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
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
- G01M3/3236—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
- G01M3/3236—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers
- G01M3/3272—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers for verifying the internal pressure of closed containers
Abstract
The invention provides a hydrogen system detection device, comprising: the device comprises a pressurizing assembly, a testing assembly and a discharging assembly; the supercharging component comprises a driving gas component, a working medium gas inlet component and a supercharging pump (8); the driving gas assembly and the working medium gas inlet assembly are connected with a booster pump (8) in parallel, and the booster pump (8) is sequentially connected with the test assembly and the discharge assembly; working medium gets into booster pump (8) through the working medium subassembly that admits air, and drive gas gets into booster pump (8) through drive gas subassembly, and drive gas drive booster pump (8) work is with working medium pressure boost to the settlement pressure, then gets into the test subassembly, through the change of test hydrogen system internal pressure, judges the gas tightness of hydrogen system. Compared with the prior art, the invention can test various hydrogen systems, has wide pressure measuring range and higher testing precision, and can monitor and record testing data in real time.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to a hydrogen system detection device.
Background
A hydrogen system is indispensable for a fuel cell vehicle as a fuel storage device of the fuel cell vehicle and a fuel supply device of an engine. Since hydrogen molecules are small and the pressure of hydrogen in a hydrogen system is high (at present, the pressure of the hydrogen system is 35MPa or 70MPa), hydrogen leakage is very easy to occur at the connection point of the hydrogen system. However, as the fuel cell industry is in the starting stage, no corresponding test system is available at the present stage for testing the hydrogen system of the fuel cell.
The existing detection mode is that pressure sensors are generally arranged at the inlet and the outlet of a front gas path and a rear gas path of a hydrogen system to be detected, nitrogen or helium is used as a detection gas source, the outlet of the hydrogen system is blocked, the gas source is input into the gas path until the pressure in the hydrogen system to be detected reaches a set pressure, the input of the gas source is stopped, and the pressure change condition in the hydrogen system to be detected is detected by the pressure sensors within a certain time, so that whether the tightness and the pressure resistance of parts such as a hydrogen cylinder, a valve and the like are qualified or not is judged.
However, nitrogen or helium is used as a gas source, which is expensive on one hand, and is not a working medium gas source on the other hand, certain experimental errors are bound to exist, and the requirement of the current detection precision is difficult to meet.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the hydrogen system detection device which can test various hydrogen systems, and has the advantages of wide pressure measurement range and higher test precision.
The purpose of the invention can be realized by the following technical scheme: the device comprises a pressurizing assembly, a testing assembly and a discharging assembly; the supercharging component comprises a driving gas component, a working medium gas inlet component and a supercharging pump (8); the driving gas assembly and the working medium gas inlet assembly are connected with a booster pump (8) in parallel, and the booster pump (8) is sequentially connected with the test assembly and the discharge assembly; working medium enters the booster pump through the working medium air inlet assembly, driving gas enters the booster pump (8) through the driving gas assembly, the driving gas drives the booster pump (8) to work, the working medium is pressurized to set pressure, then the working medium enters the testing assembly, and the airtightness of the hydrogen system is judged by testing the change of the internal pressure of the hydrogen system.
Furthermore, the driving air assembly comprises a driving air filter, a driving air pressure regulating valve, a driving air inlet electromagnetic valve and a driving air inlet ball valve which are connected in sequence; the air inlet end of the driving air filter is connected with a driving air source. The driving gas filter can filter impurities such as redundant moisture, oil and solid particles in the gas, the pressure of the driving gas can be controlled by the driving gas pressure regulating valve, and the driving gas inlet ball valve can control whether the driving gas enters the booster pump or not. The driving gas is nitrogen or compressed air.
The working medium air inlet assembly comprises a working medium filter, a working medium air inlet pressure gauge and a working medium air inlet ball valve which are connected in sequence; the air inlet end of the working medium filter is connected with a working medium air source. The working medium filter can filter impurities in the working medium, the working medium air inlet pressure gauge can detect air inlet pressure, and the working medium air inlet ball valve can control whether working medium gas enters the booster pump or not. The working medium is hydrogen, nitrogen or helium.
The air inlet end of the booster pump is connected with the driving air assembly and the working medium air inlet assembly, and the air outlet end of the booster pump is connected with the air inlet end of the testing assembly. The booster pump is driven by the driving gas to boost the working medium to the required pressure. The booster pump is a gas booster pump, the maximum booster ratio of the gas booster pump is 1:150, the maximum outlet pressure can reach 150MPa, the booster pump is non-electric and oilless due to the use of the gas booster pump, a working medium can be prevented from being polluted, combustible gas can be prevented from contacting electric devices to cause explosion danger, the maximum pressure of a gas source of the steel cylinder is 17-18 MPa, the detection pressure of a hydrogen system is up to 70MPa, therefore, the detection pressure range is small by directly using hydrogen, nitrogen and helium as the working medium, the high-pressure test cannot be met, particularly, the pressure resistance of each part under high pressure cannot be detected, nitrogen or compressed air is used as driving gas, and the pressure of the hydrogen, nitrogen and helium can be increased to 70MPa by driving the booster pump. If nitrogen is used as driving gas, the mixed contact danger of hydrogen and oxygen is avoided, and the safety is better; if compressed air is used as driving gas, the cost is lower.
The test assembly comprises a high-pressure air inlet stop valve, an air inlet temperature sensor, a high-pressure air inlet pressure sensor, a hydrogen system to be tested, a low-pressure air outlet pressure sensor and an air outlet stop valve which are connected in sequence. The high-pressure air inlet stop valve, the air inlet temperature sensor, the high-pressure air inlet pressure sensor, the low-pressure air outlet pressure sensor and the air outlet stop valve are all connected with a central control system, pressure data and temperature data are recorded in real time through the central control system, and the opening degree of each stop valve is controlled. After the pressurization of the hydrogen system to be measured is finished, the high-pressure air inlet stop valve is closed to block the gas exchange between the hydrogen system and the outside, the air outlet stop valve is the same as the high-pressure air inlet stop valve, and after the pressurization of the hydrogen system to be measured is finished, the valve is closed to block the gas exchange between the hydrogen system and the outside. The gas inlet temperature sensor can detect the gas temperature change in the hydrogen system to be detected in real time, the high-pressure gas inlet pressure sensor can detect the gas pressure change in the hydrogen system to be detected in real time, and the low-pressure gas outlet pressure sensor can detect the gas pressure change after the pressure in the hydrogen system to be detected is reduced in real time.
The central control system is also connected with each sensor and valve in the pressurizing assembly and the testing assembly.
The high-pressure air inlet pressure sensor and the low-pressure air outlet pressure sensor are high-precision pressure sensors.
Furthermore, the central control system is connected with an air inlet temperature sensor, a high-pressure air inlet pressure sensor and a low-pressure air outlet pressure sensor. And the central control system is connected with the driving gas inlet electromagnetic valve. The central control system can record temperature and pressure change data in real time and control the driving gas inlet electromagnetic valve so as to control whether the booster pump works or not.
The discharge assembly comprises a bypass pipeline connected between the pressurization assembly and the test assembly, and a pressure relief valve arranged on the bypass pipeline. The pressure relief valve is a high-pressure relief valve; the bypass pipeline is made of stainless steel.
Compared with the prior art, the invention has the following advantages:
1. the pressure measurement range is wide, and the air tightness of hydrogen systems in different pressure sections (1-70 MPa) can be tested through a double booster pump system; meanwhile, whether the tightness and the pressure resistance of parts such as a hydrogen cylinder, a valve and the like are qualified or not can be detected, for example, the testing pressure of a hydrogen system is adjusted to 70MPa and continuously operated for 24 hours, and the hydrogen pressure in the system can be maintained at more than 90%, so that the tightness and the pressure resistance of the parts such as the hydrogen cylinder, the valve and the like are proved to be good, and the service life of the parts on a fuel cell can reach 3 years.
2. The testing precision is high, a high-precision pressure sensor is selected from the testing parts, the precision of the pressure sensor can reach 0.001MPa, and the pressure value can be accurately measured and used for analyzing the slight change of the pressure value; meanwhile, a temperature sensor is added, the precision of the temperature sensor can reach 0.1 ℃, and the influence of temperature on pressure data can be removed in analysis data;
3. the device is provided with a recording unit, can obtain pressure and temperature sensor test data in real time, obtain specific data and pressure data change trend in real time through a screen, can copy the obtained pressure and temperature data and is provided with a time axis, and is convenient for recording and analyzing the data;
4. the system can establish communication with a hydrogen system, and further can acquire data such as pressure, temperature and the like of a hydrogen bottle in the hydrogen system;
5. in structure, the invention has simple and exquisite structure, fully simplifies the structure under the condition of finishing a work target, reduces the use of unnecessary valves, has compact integral structure of equipment, can conveniently transport and carry, and can be manually pushed to adjust the position even in a laboratory through the bottom caster.
6. In principle, the invention fully calculates the upper and lower limits of the front and rear pressure values of the gas supercharger according to the compression ratio of the gas supercharger, and can quickly pressurize to reach the required pressure value. And equipped with safety elements such as gas shut-off valves, filters, blow-off valves, etc. After the central control system is equipped, the testing personnel can be isolated from the high-pressure gas pipeline, and only the system is operated at the central control terminal, so that the personal safety of the testing personnel is fully guaranteed.
Drawings
FIG. 1 is a schematic view of a hydrogen system detection device according to the present invention;
in the figure: 1-driving gas filter, 2-driving gas pressure regulating valve, 3-driving gas inlet electromagnetic valve, 4-driving gas inlet ball valve, 5-working medium filter, 6-working medium inlet pressure gauge, 7-working medium inlet ball valve, 8-booster pump, 9-high pressure inlet stop valve, 10-inlet temperature sensor, 11-high pressure inlet pressure sensor, 12-low pressure outlet pressure sensor, 13-outlet stop valve, 14-central control system, 15-high pressure relief valve.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The following examples are carried out on the premise of the technical scheme of the invention, and detailed embodiments and specific operation processes are given, but the scope of the invention is not limited to the following examples.
The parts adopted in the invention are all commercial products, for example, the pressure sensor can be a pressure sensor of KEWILL brand or AST brand, the temperature sensor can be a temperature sensor of KEWILL brand or KEWENCE brand, the filter can be a high-precision filter of SWAGELOK brand or HAM-LET brand, the hand valve can be a high-pressure hand valve of SWAGELOK brand or HAM-LET brand, and the pipeline can be a high-pressure stainless steel seamless steel pipe of SCHOELLER brand or SANDVIK brand.
Example 1
As shown in fig. 1, a hydrogen system detecting apparatus includes: the device comprises a driving gas filter 1, a driving gas pressure regulating valve 2, a driving gas inlet electromagnetic valve 3, a driving gas inlet ball valve 4, a working medium filter 5, a working medium inlet pressure gauge 6, a working medium inlet ball valve 7, a booster pump 8, a high-pressure inlet stop valve 9, an inlet temperature sensor 10, a high-pressure inlet pressure sensor 11, a low-pressure outlet pressure sensor 12, an outlet stop valve 13, a central control system 14 and a high-pressure relief valve 15.
The pipeline is made of stainless steel, the driving air filter 1, the driving air pressure regulating valve 2, the driving air inlet electromagnetic valve 3 and the driving air inlet ball valve 4 are sequentially connected to form a driving air assembly, and the air inlet end of the driving air filter 1 is connected with a driving air source.
The working medium filter 5, the working medium air inlet pressure gauge 6 and the working medium air inlet ball valve 7 are sequentially connected to form a working medium air inlet assembly, wherein the air inlet end of the working medium filter 5 is connected with a working medium air source.
The air inlet end of the booster pump 8 is connected with the air outlet ends of the driving air inlet ball valve 4 and the working medium inlet ball valve 7, and the air outlet end of the booster pump is connected with the air inlet end of the high-pressure air inlet stop valve 9.
The high-pressure air inlet stop valve 9, the air inlet temperature sensor 10, the high-pressure air inlet pressure sensor 11, the low-pressure air outlet pressure sensor 12 and the air outlet stop valve 13 form a testing assembly, wherein the high-pressure air inlet stop valve 9 and the air outlet stop valve 13 are respectively connected to an air inlet end and an air outlet end of the testing assembly; the system to be tested is arranged between the high-pressure inlet pressure sensor 11 and the low-pressure outlet pressure sensor 12; the high-pressure inlet pressure sensor 11 is connected with the inlet end of the hydrogen system to be measured, and the low-pressure outlet pressure sensor 12 is connected with the outlet end of the hydrogen system to be measured.
The central control system is connected with an air inlet temperature sensor 10, a high-pressure air inlet pressure sensor 11, a low-pressure air outlet pressure sensor 12 and a driving air inlet electromagnetic valve 3.
The test method is as follows:
1. connecting the components according to the connection mode shown in FIG. 1, closing valves in the driving gas component and the discharging component, closing valves in the working medium gas inlet component and the testing component, and opening a working medium gas source (hydrogen) purging system for 3-5 minutes;
2. closing the air outlet stop valve 13 and the high-pressure relief valve 15, opening other valves, enabling driving air to enter the booster pump 8 sequentially through the driving air filter 1, the driving air pressure regulating valve 2, the driving air inlet electromagnetic valve 3 and the driving air inlet ball valve 4, enabling the driving air to drive the booster pump 8 to work, boosting a working medium to a set pressure (35MPa), enabling the working medium to enter a testing assembly, and testing pressure changes of the high-pressure air inlet pressure sensor 11 and the low-pressure air outlet pressure sensor 12 within 24 hours;
after 3.24h, checking the pressure value, and when the pressure change is lower than 10%, indicating that the pressure maintaining experiment of the test piece is qualified;
after 4.24h, checking the pressure value, when the pressure change is more than or equal to 10%, indicating that the pressure maintaining experiment of the test piece is unqualified, sequentially replacing all parts in the system to continue testing, and troubleshooting the parts with problems;
5. and (4) detecting all parts to be qualified, closing the working medium air inlet ball valve 7 and the driving air inlet ball valve 4, opening the air outlet stop valve 13 and the high-pressure release valve 15, and discharging the gas in the system.
The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (10)
1. A hydrogen system detection device, comprising: the device comprises a pressurizing assembly, a testing assembly and a discharging assembly; the supercharging component comprises a driving gas component, a working medium gas inlet component and a supercharging pump (8); the driving gas assembly and the working medium gas inlet assembly are connected with a booster pump (8) in parallel, and the booster pump (8) is sequentially connected with the test assembly and the discharge assembly; working medium gets into booster pump (8) through the working medium subassembly that admits air, and drive gas gets into booster pump (8) through drive gas subassembly, and drive gas drive booster pump (8) work is with working medium pressure boost to the settlement pressure, then gets into the test subassembly, through the change of test hydrogen system internal pressure, judges the gas tightness of hydrogen system.
2. The hydrogen system detection device according to claim 1, wherein the driving gas assembly comprises a driving gas filter (1), a driving gas pressure regulating valve (2), a driving gas inlet solenoid valve (3) and a driving gas inlet ball valve (4) which are connected in sequence; the air inlet end of the driving air filter (1) is connected with a driving air source.
3. The hydrogen system detection device according to claim 1, wherein the working medium intake assembly comprises a working medium filter (5), a working medium intake pressure gauge (6) and a working medium intake ball valve (7) which are connected in sequence; the air inlet end of the working medium filter (5) is connected with a working medium air source.
4. The hydrogen system detection device according to claim 1, wherein the test component comprises a high-pressure gas inlet stop valve (9), a gas inlet temperature sensor (10), a high-pressure gas inlet pressure sensor (11), a hydrogen system to be detected, a low-pressure gas outlet pressure sensor (12) and a gas outlet stop valve (13) which are connected in sequence.
5. The hydrogen system detection device according to claim 4, wherein the high-pressure inlet stop valve (9), the inlet temperature sensor (10), the high-pressure inlet pressure sensor (11), the low-pressure outlet pressure sensor (12) and the outlet stop valve (13) are all connected with a central control system (14), and the central control system (14) records pressure data and temperature data in real time and controls the opening degree of each stop valve.
6. The hydrogen system detection device according to claim 5, characterized in that the central control system (14) is further connected with the pressure boosting assembly, each sensor in the testing assembly and the valve.
7. The hydrogen system detecting device according to claim 1, wherein the booster pump is a gas booster pump, a maximum booster ratio of the gas booster pump is 1:150, and a maximum outlet pressure can reach 150 MPa.
8. The hydrogen system detection device according to claim 1, wherein the working medium is hydrogen, nitrogen or helium, and the driving gas is nitrogen or compressed air.
9. The hydrogen system detection device according to claim 1, wherein the discharge assembly comprises a bypass pipeline connected between the pressurization assembly and the test assembly, and a pressure relief valve (15) is arranged on the bypass pipeline.
10. The hydrogen system detection device according to claim 9, wherein the pressure relief valve (15) is a high pressure relief valve; the bypass pipeline is made of stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011127100.2A CN112179587A (en) | 2020-10-20 | 2020-10-20 | Hydrogen system detection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011127100.2A CN112179587A (en) | 2020-10-20 | 2020-10-20 | Hydrogen system detection device |
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| CN112179587A true CN112179587A (en) | 2021-01-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113405738A (en) * | 2021-06-01 | 2021-09-17 | 奥萨崎医疗科技有限公司 | Blood pressure air pump pressure leakage detection and alarm device |
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2020
- 2020-10-20 CN CN202011127100.2A patent/CN112179587A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113405738A (en) * | 2021-06-01 | 2021-09-17 | 奥萨崎医疗科技有限公司 | Blood pressure air pump pressure leakage detection and alarm device |
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