CN1094196C - Dual-fuel automotive high pressure duct leakage detecting device - Google Patents
Dual-fuel automotive high pressure duct leakage detecting device Download PDFInfo
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- CN1094196C CN1094196C CN 99100541 CN99100541A CN1094196C CN 1094196 C CN1094196 C CN 1094196C CN 99100541 CN99100541 CN 99100541 CN 99100541 A CN99100541 A CN 99100541A CN 1094196 C CN1094196 C CN 1094196C
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- high pressure
- pressure
- gas
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- leakage
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- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The present invention relates to a high-pressure pipeline leakage detection device used for the safety detection of dual-fuel vehicles. A positive pressure leakage detection method is used, and gas is used as working media. A high-pressure gas generating device is used for compressing the medium gas to needed high pressure, and then, the gas is injected into a high-pressure pipeline to simulate the actual working conditions of the high-pressure pipeline. Then, detection is carried out by a medium leakage detector, and if leakage exists, the leaked medium gas is sucked in by the medium leakage detector. Analysis is carried out by the medium leakage detector so as to obtain a determined leakage value which is compared with a standard leakage value so as to judge whether failure leakage exists or not. Thus, the existing qualitative detection methods are changed.
Description
Technical field:
The high pressure duct leakage detecting device that uses when the present invention relates to a kind of dual-fuel automobile safety detection.
Background technology:
Dual-fuel automobile is the fuel-engined vehicle repacking of adopting typing, on the basis that keeps former car oil supply system, increases the automobile-used gas combustion apparatus of a cover, forms the oil-gas two-way car.Make motor vehicle fuel with rock gas or liquefied petroleum gas (LPG), on the basis of the former car power performance of basic maintenance, improved the economy of fuel, reduced automobile gas emission pollution significantly.Vehicle refitting is simple in addition, and is safe and reliable, is suitable for the resourceful advantage of China's natural gas and liquefied petroleum gas (LPG).
The existing detection method that dual-fuel automotive high pressure duct is leaked is, by relevant international requirement, can only use the masking liquid method, promptly is coated with suds on pipeline, and whether observation producing soap bubble.The shortcoming of this kind method is under the very high situation of pressure (automobile with compressed natural gas high-pressure section service pressure is 20MP), leaks the good soap bubble that do not become even have, and for faint leakage, does not also have the data of quantification.Analyze theoretically, as long as exist pressure reduction just to have leakage phenomenon to take place, but faint leakage allows, but will quantize.Owing to there is above-mentioned shortcoming, this method also is not suitable for the requirement of dual-fuel automobile to security and economy.
Summary of the invention:
That task of the present invention provides is a kind of science, practical, detect a kind of device that dual-fuel automotive high pressure duct leaks accurately, even leak very small, also can detect, and provide a concrete leakage value, to determine being leakage in the normal allowed band, still exceed permissible value.And require easy to operately, detect rapidly.
For achieving the above object, the present invention adopts the malleation method of leaking hunting, and based on original pressure duct of dual-fuel automobile, has increased gases at high pressure generation device and dielectric gas and has visited neglected loading and put.As dielectric gas, the pressure duct rated operating pressure is Po with helium in the present invention, and the gases at high pressure generation device is compressed to high pressure more than the 1.1Po with dielectric gas, and stores, for using at any time.Vehicle-mounted gas cylinder stop valve is closed, gas filling valve is opened, high-pressure medium gas is charged into the automotive high pressure duct from gas filling valve, and observe tensimeter, when pressure reaches 1.1Po, stop inflation with air filling gun.Detect leakage with the medium leak locator, enter the mouth to reduction valve from the gas cylinder stop valve, all high-pressure sections leak locator probe detection, if any leakage position, when leak locator detects this position dielectric gas is sucked, and analyze, draw the occurrence of leakage, if surpass the arm's length standard value, the warning of will sounding.
Working medium leak locator of the present invention not only can detect leakage point qualitatively, and the occurrence that detects leakage that can be quantitative, is normal leakage thereby judge, or fault is leaked.
The present invention, is difficult for chemical reaction takes place as actuating medium with inert gas helium, and nontoxic, pollution-free, for detection provides safety assurance.
The present invention adopts the malleation method of leaking hunting, and simulated high-pressure pipeline practical working situation makes testing result true, credible.
Description of drawings:
Accompanying drawing 1. gases at high pressure generation device schematic diagrams
Accompanying drawing 2. leak detection system overall schematic
Embodiment:
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
The described gases at high pressure generation device of Fig. 1 comprises＜1〉original helium storage device,＜2〉centre helium storage devices that＜3〉high-pressure helium compress, store, reach releasing means.
＜1〉is original helium storage device,, directly sells producer and buy that helium pressure is P when buying from helium together with helium
1
＜2〉be in the middle of the helium storage device, for compressor provides the low pressure helium of certain pressure, gas cylinder QP
2Pressure range is P
2--P
2' (P
2＜P
2').Tensimeter B
3Have electric contact, control electromagnetic valve DF
1, as gas cylinder QP
2Pressure＜=P
2The time, B
3This situation of perception makes DF
1Open, to QP
2Inflation; As gas cylinder QP
2Pressure＞=P
2' time, B
3This situation of perception makes DF
1End, stop to QP
2Inflation makes QP
2Pressure remains in the scope of compressor inlet permission.
＜3〉be that high-pressure helium compresses, stores, reaches releasing means.Gas cylinder QP
2In gas enter compressor, compressor is compressed to high pressure more than the 1.1Po with gas, gases at high pressure enter gas cylinder QP
3, QP
3Pressure range P
3-P
3' (P3＞P3 '), QP
3Bottleneck is equipped with the tensimeter control electromagnetic valve of charged contact and the work of compressor.Work as QP
3Pressure＞=P
3The time, tensimeter B
4This situation of perception makes DF
2End, start once more to help compressor, compressor also quits work simultaneously.Air filling gun is by high-pressure hose and QP
3Link to each other, gases at high pressure are added in the dual-fuel automotive high pressure duct from gas filling valve with air filling gun.After the several times use, QP
3Pressure is reduced to＜=P
3' time, B
4This situation of perception is with DF
2Open, compressor starts work is to QP
3Inflation.At QP
3Entrance point and endpiece all are equipped with hand stop valve, can prevent DF
2The high pressure gas leakage that causes with the air filling gun valve invalidation.
Fig. 2 is described to be the leak detection system overall schematic.Comprise＜1〉gases at high pressure generation device＜2〉automobile fuel gas pipe systems,＜3〉medium leak locators.
Earlier will＜2〉in the gas cylinder stop valve close＜1 air filling gun high-pressure helium is injected pressure duct from gas filling valve, observe tensimeter, when pressure duct pressure reaches 1.1Po, stop inflation.The probe detection of all high voltage devices usefulness helium leak detection mass spectrometers that enter the mouth from the gas cylinder stop valve to reduction valve one time.If leakage is arranged, helium leak detection mass spectrometer sucks the dielectric gas that leaks out, and analyzes, and draws concrete leakage value, and with standard value relatively, if the value of being above standard then belongs to the fault leakage, the leak locator warning of will sounding.
The present invention is owing to adopt the malleation method of leaking hunting, simulated high-pressure system practical working situation, and have concrete numerical value to describe to leakage, measurement result is true, reliable.Since use inert gas helium as dielectric gas, nontoxic, pollution-free, and be difficult for taking place chemical reaction, the safety that assurance detects is carried out.Since with air filling gun directly with high-pressure medium gas from the gas filling valve filling line, so easy to operate, efficient is high.
Claims (6)
1. high pressure duct leakage detecting device that is used for the dual-fuel automobile safety detection, based on the pressure duct of dual-fuel automobile own, it is characterized in that: adopt the malleation method of leaking hunting, with helium as actuating medium, with the gases at high pressure generation device helium is compressed to required high pressure, with air filling gun high-pressure helium is injected automotive high pressure duct from gas filling valve, simulated high-pressure pipeline practical working situation; Then, survey, will leak with the numerical value form and show with the medium leak locator.
2. dual-fuel automotive high pressure duct leakage detecting device according to claim 1, it is characterized in that: in the gases at high pressure generation device, the tensimeter and the solenoid valve of middle gas cylinder, charged contact between original helium tank and compressor, have been increased, form the low pressure feeder, for compressor provides low pressure helium sufficient and that keep certain pressure.
3. dual-fuel automotive high pressure duct leakage detecting device according to claim 1, it is characterized in that: in the gases at high pressure generation device, tensimeter and the solenoid valve of gas cylinder, charged contact behind compressor, have been increased, form the high-pressure gas device, the high pressure gas storage that compressor produces is got up; Tensimeter is connected with compressor with solenoid valve, and the pressure control that makes gas cylinder and helps compressor and starts once more within the specific limits.
4. dual-fuel automotive high pressure duct leakage detecting device according to claim 1 is characterized in that: in the gases at high pressure generation device, connect high-pressure hose and air filling gun behind gas cylinder, can make gases at high pressure inject automotive high pressure duct easily.
5. dual-fuel automotive high pressure duct leakage detecting device according to claim 1 is characterized in that: at gas cylinder entrance point, endpiece hand stop valve is housed all, can prevents the high pressure gas leakage that solenoid valve and air filling gun valve invalidation cause.
6. dual-fuel automotive high pressure duct leakage detecting device according to claim 1 is characterized in that: use helium leak detection mass spectrometer, can make quantitative numerical value to leakage and describe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99100541 CN1094196C (en) | 1999-02-08 | 1999-02-08 | Dual-fuel automotive high pressure duct leakage detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99100541 CN1094196C (en) | 1999-02-08 | 1999-02-08 | Dual-fuel automotive high pressure duct leakage detecting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1229916A CN1229916A (en) | 1999-09-29 |
| CN1094196C true CN1094196C (en) | 2002-11-13 |
Family
ID=5270058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99100541 Expired - Fee Related CN1094196C (en) | 1999-02-08 | 1999-02-08 | Dual-fuel automotive high pressure duct leakage detecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1094196C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101793587B (en) * | 2010-01-26 | 2011-12-28 | 神龙汽车有限公司 | Method for safely detecting high pressure sealing performance of gas system of compressed natural gas automobile after impact test |
| CN102261981A (en) * | 2011-04-21 | 2011-11-30 | 福建博纯材料有限公司 | Safe detection device and method for gas storage steel cylinder |
| CN103148991A (en) * | 2013-02-05 | 2013-06-12 | 贵州开阳化工有限公司 | Pressure test and airtight test method of pressed equipment and pressure pipeline system |
| CN104075855B (en) * | 2014-07-23 | 2016-04-06 | 西安优耐特容器制造有限公司 | A kind of pipe adapter leak detection apparatus |
| CN104913204B (en) * | 2015-06-15 | 2018-02-13 | 汉威科技集团股份有限公司 | Pipeline gas leak detecting device and its detection method |
| CN107677435A (en) * | 2017-09-26 | 2018-02-09 | 无锡赛盈动力科技有限公司 | The air-tightness detection method and detection means of a kind of controller |
| CN108896255A (en) * | 2018-07-18 | 2018-11-27 | 山东淄博汉能薄膜太阳能有限公司 | A kind of target pipe leakage detection apparatus and leak hunting method |
-
1999
- 1999-02-08 CN CN 99100541 patent/CN1094196C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1229916A (en) | 1999-09-29 |
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| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
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Addressee: Yu Zhiqian Document name: Notification of Decision on Request for Restoration of Right |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20021113 Termination date: 20120208 |