CN110793724A - Vehicle-mounted hydrogen storage system leak detection device and method - Google Patents
Vehicle-mounted hydrogen storage system leak detection device and method Download PDFInfo
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- CN110793724A CN110793724A CN201911056242.1A CN201911056242A CN110793724A CN 110793724 A CN110793724 A CN 110793724A CN 201911056242 A CN201911056242 A CN 201911056242A CN 110793724 A CN110793724 A CN 110793724A
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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
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Abstract
The invention discloses a vehicle-mounted hydrogen storage system leak detection device and method, which comprises a detection gas source, wherein the detection gas source is connected with an inlet of a pressurizing device, an outlet of the pressurizing device is connected with a cooler, a one-way valve, a safety valve, an output filter, a pneumatic output valve, a manual output valve and a high-pressure output interface which are sequentially arranged, and the high-pressure output interface is connected with the vehicle-mounted hydrogen storage system. The energy is saved, the leakage of the vehicle-mounted hydrogen storage system is effectively detected, and the waste of hydrogen resources caused by poor sealing in the use process is reduced.
Description
Technical Field
The invention relates to the technical field of new energy automobiles, in particular to a vehicle-mounted hydrogen storage system leak detection device and method.
Background
The vehicle-mounted hydrogen storage system is an important configuration component of a new energy automobile, pressure maintaining and leakage detection are important links in the production process of the new energy automobile, and are also important means for performance evaluation of the new energy automobile, wherein micro-leakage detection of a hydrogen sealing test troubles the whole industry for a long time. The hydrogen has the characteristics of small flammable and explosive molecular weight and the like, so that the leakage is easy to occur particularly when the vehicle-mounted hydrogen storage system is in a hydrogen charging and pressure state.
Before the invention, whether the vehicle-mounted hydrogen storage system leaks or not is detected, and a manual low-pressure nitrogen detection mode is usually adopted. The manual low-pressure nitrogen detection has the following problems:
(1) the physical characteristics of nitrogen are greatly different from those of hydrogen, and after the nitrogen is qualified by detection, a serious leakage phenomenon still exists in the process of actually loading the hydrogen;
(2) and the low-pressure detection does not meet the working condition of actual use pressure.
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 a vehicle-mounted hydrogen storage system leak detection device and method, which can solve the problems.
In order to achieve the technical purpose, the technical scheme of the invention is realized as follows:
the utility model provides a leak hunting device of on-vehicle hydrogen storage system, includes the detection air supply, the detection air supply is connected with the supercharging device entry, the exit linkage of supercharging device has cooler, check valve, relief valve, output filter, pneumatic output valve, manual output valve and the high pressure output interface that sets gradually, the on-vehicle hydrogen storage system of high pressure output interface connection.
Further, the detection gas source comprises helium and/or nitrogen.
Furthermore, the supercharging device comprises a booster pump and a driving air source connected with the driving end of the booster pump, and the area of the driving end in the booster pump is larger than that of the output end.
Furthermore, a filtering pressure regulating valve, a pump speed regulating valve and a pump electromagnetic valve which are connected in sequence are arranged between the driving air source and the booster pump.
Further, the driving air source is compressed air.
Further, an output pressure transmitter, an output pressure gauge, a manual pressure relief valve and a pneumatic pressure relief valve are arranged between the manual output valve and the high-pressure output interface.
A vehicle-mounted hydrogen storage system leak detection method comprises the following steps:
1) filling a detection gas source into the vehicle-mounted hydrogen storage system;
2) pressurizing a detection gas source in the vehicle-mounted hydrogen storage system to a set pressure;
3) maintaining the pressure for a set time, and detecting the leakage condition of each interface by using a leakage detector;
4) and (5) decompressing, and repeating the steps for multiple times.
Further, the detection gas source in the steps 2) and 3) is gradually increased to the set pressure through step pressurization and pressure maintaining.
The invention has the beneficial effects that:
(1) the invention is provided with the booster pump, so that the pressure can be improved to simulate the leakage condition of high pressure.
(2) The energy is saved, the leakage of the vehicle-mounted hydrogen storage system is effectively detected, and the waste of hydrogen resources caused by poor sealing in the use process is reduced.
(3) The system is equipped with a manual pressure relief valve that can be used when the pressure relief pneumatic valve fails.
(4) The system can realize segmented pressure maintaining and is convenient for leakage detection and other operations.
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 a leak detection device for an on-board hydrogen storage system.
In the figure: 1. the system comprises a driving gas source, 2 parts of a helium gas input port, 3 parts of a nitrogen gas input port, 4 parts of a booster pump, 5 parts of a cooler, 6 parts of a one-way valve, 7 parts of a safety valve, 8 parts of an output filter, 9 parts of a pneumatic output valve, 10 parts of a manual output valve, 11 parts of a high-pressure output interface, 12 parts of a filtering pressure regulating valve, 13 parts of a pump speed regulating valve and 14 parts of a pump electromagnetic valve.
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 leak detection device for a vehicle-mounted hydrogen storage system according to an embodiment of the present invention includes a detection gas source, the detection gas source is connected to an inlet of a pressurization device, an outlet of the pressurization device is connected to a cooler, a check valve, a safety valve, an output filter, a pneumatic output valve, a manual output valve, and a high-pressure output interface, which are sequentially arranged, and the high-pressure output interface is connected to the vehicle-mounted hydrogen storage system.
In one embodiment of the invention, the detection gas source comprises helium and/or nitrogen.
In a specific embodiment of the invention, the supercharging device comprises a booster pump and a driving gas source connected with a driving end of the booster pump, wherein the area of the driving end of the booster pump is larger than that of an output end of the booster pump.
In an embodiment of the invention, a filtering pressure regulating valve, a pump speed regulating valve and a pump electromagnetic valve which are connected in sequence are arranged between the driving air source and the booster pump.
In one embodiment of the invention, the driving air source is compressed air.
In a specific embodiment of the present invention, an output pressure transmitter, an output pressure gauge, a manual pressure relief valve, and a pneumatic pressure relief valve are disposed between the manual output valve and the high-pressure output interface.
A vehicle-mounted hydrogen storage system leak detection method comprises the following steps:
1) filling a detection gas source into the vehicle-mounted hydrogen storage system;
2) pressurizing a detection gas source in the vehicle-mounted hydrogen storage system to a set pressure;
3) maintaining the pressure for a set time, and detecting the leakage condition of each interface by using a leakage detector;
4) and (5) decompressing, and repeating the steps for multiple times.
In one embodiment of the present invention, the detection gas source is gradually increased to the set pressure through the step-by-step pressurization and pressure holding in the steps 2) and 3).
In order to facilitate understanding of the above-described technical aspects of the present invention, the above-described technical aspects of the present invention will be described in detail below in terms of specific usage.
In particular use, according to the leak detection device of the vehicle-mounted hydrogen storage system,
the booster pump 4 takes compressed air of 0.6-0.8 MPa as a driving air source 1 and helium of 3-12 MPa as detection gas, and the booster pump 4 is used for boosting, wherein the rated output pressure of the booster pump 4 is 70MPa, and the output pressure can be set.
The detection gas is pressurized and filled into the vehicle-mounted hydrogen storage system by using the booster pump 4, the temperature of the gas at the outlet of the booster pump 4 is higher after compression, the gas is cooled by the cooler 5, the check valve 6 prevents the detection gas from flowing back from the vehicle-mounted hydrogen storage system, the safety valve 7 prevents overhigh pressure, protects pipeline equipment, the output filter 8 is used for filtering impurities in the detection gas, the pneumatic output valve 9 is used for opening and closing a pipeline, and the manual output valve 10 is in a normally open state and is closed during maintenance. The high-pressure output interface 11 is connected with the vehicle-mounted hydrogen storage system through threads. The gas that relief valve, manual relief valve and pneumatic relief valve let out carries out recycle, avoids extravagant.
The mechanical and electrical parts of the system are integrated in a compact closed cabinet, the left side of the cabinet is provided with an air source input interface and a power switch, the right side of the cabinet is provided with an output interface and a pressure relief interface, the front side of the cabinet is provided with a control panel convenient to operate, a display, a pressure gauge and the like are arranged on the panel, observation and operation are facilitated, movable casters are arranged at the bottom of the cabinet, and the cabinet is convenient to move and can be locked. The system adopts a double-cutting sleeve sealing mode, so that the reliability is high, and all parts are convenient to connect, operate and maintain.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. The utility model provides a leak hunting device of on-vehicle hydrogen storage system, includes the detection air supply, its characterized in that, the detection air supply is connected with the supercharging device entry, the exit linkage of supercharging device has cooler, check valve, relief valve, output filter, pneumatic output valve, manual output valve and the high pressure output interface that sets gradually, the on-vehicle hydrogen storage system of high pressure output interface connection.
2. The vehicle-mounted hydrogen storage system leak detection device according to claim 1, characterized in that: the detection gas source comprises helium and/or nitrogen.
3. The vehicle-mounted hydrogen storage system leak detection device according to claim 2, characterized in that: the booster device comprises a booster pump and a driving air source connected with the driving end of the booster pump, and the area of the driving end in the booster pump is larger than that of the output end.
4. The vehicle-mounted hydrogen storage system leak detection device according to claim 3, characterized in that: and a filtering pressure regulating valve, a pump speed regulating valve and a pump electromagnetic valve which are sequentially connected are arranged between the driving air source and the booster pump.
5. The vehicle-mounted hydrogen storage system leak detection device according to claim 3, characterized in that: the driving air source is compressed air.
6. The leak detection device for the vehicle-mounted hydrogen storage system according to claim 4 or 5, characterized in that: an output pressure transmitter, an output pressure gauge, a manual pressure relief valve and a pneumatic pressure relief valve are arranged between the manual output valve and the high-pressure output interface.
7. A vehicle-mounted hydrogen storage system leak detection method is characterized by comprising the following steps:
1) filling a detection gas source into the vehicle-mounted hydrogen storage system;
2) pressurizing a detection gas source in the vehicle-mounted hydrogen storage system to a set pressure;
3) maintaining the pressure for a set time, and detecting the leakage condition of each interface by using a leakage detector;
4) and (5) decompressing, and repeating the steps for multiple times.
8. The leak detection method of the vehicle-mounted hydrogen storage system according to claim 7, characterized by comprising the following steps: and in the steps 2) and 3), the detected gas source is gradually increased to the set pressure through step-by-step pressure increasing and maintaining.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911056242.1A CN110793724A (en) | 2019-10-31 | 2019-10-31 | Vehicle-mounted hydrogen storage system leak detection device and method |
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| CN201911056242.1A CN110793724A (en) | 2019-10-31 | 2019-10-31 | Vehicle-mounted hydrogen storage system leak detection device and method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111982407A (en) * | 2020-08-11 | 2020-11-24 | 山西国投海德利森氢能装备股份有限公司 | A airtight detecting system for hydrogen energy automobile |
| CN111999011A (en) * | 2020-09-15 | 2020-11-27 | 广东海德利森一氢科技有限公司 | Valve performance detection system |
| CN112197916A (en) * | 2020-09-08 | 2021-01-08 | 威凯检测技术有限公司 | Method for detecting air tightness of refrigerating system |
| CN112326147A (en) * | 2020-10-29 | 2021-02-05 | 清华大学 | High-pressure gas seal detection test system with adjustable pressure release mode |
| CN112326156A (en) * | 2020-10-29 | 2021-02-05 | 清华大学 | High-pressure gas seal that can set for dwell time detects and uses test system |
| CN112326136A (en) * | 2020-10-29 | 2021-02-05 | 清华大学 | High-pressure gas seal detects uses test system based on nitrogen gas replacement |
| CN113984304A (en) * | 2021-12-28 | 2022-01-28 | 河南氢枫能源技术有限公司 | Hydrogen energy equipment test system and test method |
| CN114136559A (en) * | 2021-10-14 | 2022-03-04 | 东风汽车集团股份有限公司 | Full-automatic pressure maintaining and leakage detecting method and device for gas of fuel cell vehicle |
| CN114577409A (en) * | 2020-11-30 | 2022-06-03 | 宝能汽车集团有限公司 | Detection method and detection system for hydrogen leakage rate |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111982407A (en) * | 2020-08-11 | 2020-11-24 | 山西国投海德利森氢能装备股份有限公司 | A airtight detecting system for hydrogen energy automobile |
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| CN112326136A (en) * | 2020-10-29 | 2021-02-05 | 清华大学 | High-pressure gas seal detects uses test system based on nitrogen gas replacement |
| CN112326156B (en) * | 2020-10-29 | 2021-07-30 | 清华大学 | High-pressure gas seal that can set for dwell time detects and uses test system |
| CN114577409A (en) * | 2020-11-30 | 2022-06-03 | 宝能汽车集团有限公司 | Detection method and detection system for hydrogen leakage rate |
| CN114136559A (en) * | 2021-10-14 | 2022-03-04 | 东风汽车集团股份有限公司 | Full-automatic pressure maintaining and leakage detecting method and device for gas of fuel cell vehicle |
| CN113984304A (en) * | 2021-12-28 | 2022-01-28 | 河南氢枫能源技术有限公司 | Hydrogen energy equipment test system and test method |
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Application publication date: 20200214 |