CN104913886A - New method for leakage detection of Freon valve - Google Patents
New method for leakage detection of Freon valve Download PDFInfo
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- CN104913886A CN104913886A CN201510184162.XA CN201510184162A CN104913886A CN 104913886 A CN104913886 A CN 104913886A CN 201510184162 A CN201510184162 A CN 201510184162A CN 104913886 A CN104913886 A CN 104913886A
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Abstract
The invention provides a new method for leakage detection of a Freon valve, and belongs to the technical field of valve supervision and inspection. Freon is input via a Freon control vale firstly, high-temperature high-voltage water vapor is input via a high-temperature high-voltage stream control valve then, a mixed gas of the high-temperature high-voltage water vapor and the Freon enters a checked valve, multipoint step-by-step air extraction is performed on the checked valve by using an air extracting device, the extracted mixed gas is cooled in an air cooling device firstly, gas-liquid separation is performed in a gas-liquid separation device subsequently, and, finally, a halogen detector performs detection at air outlet of the gas-liquid separation device. The usage amount of the Freon is reduced, and serious pollution caused by that total fluoride as a working medium performs detection is reduced; a leakage point is accurately located through detection for the tracer gas Freon, and the leakage grade is determined through the number of lit alarm indicating lamps; and the cooling and gas-liquid separation devices are increased, an influence of too high stream temperature is prevented, and inspection precision is improved.
Description
Technical field
The invention belongs to valve prison inspection technical field, especially utilize freon as tracer gas to detect valve leak source and to determine leakage class.
Background technology
At present, valve leak hunting method mainly contains: bubble leak detection method, halogen leak detection, pressure drop Leak Detection method, sensor flow detection method, helium spectral analysis detection method and ultrasonic leak detection method.Though tradition bubble leak detection method can detect leakage, cannot measure leakage rate, though the gas collection method improved thus can measure leakage rate, precision is inadequate, and it is very large to implement limitation.Pressure drop Leak Detection method indirect calculation can go out slip, but owing to detect and the reason of precision is difficult to detect micro-leakage, implements efficiency lower at general industry scene.Sensor flow detection method can go out slip by direct-detection, but the accuracy of instrument needed for measuring for tiny leakage requires very high, thus causes testing cost high, is difficult to realize at general industry scene.Helium spectral analysis detection method mainly detects tiny leakage, and leak detection sensitivities is high, but needs to build vacuum environment, and the whole testing process time is longer, and helium is expensive, and testing cost is high, and in valve enterprise, utilization rate is lower.Ultrasonic leak detection method can quick position leak source, and consuming time short, precision of detecting leak gas is high, but ultrasonic leak detection equipment development technical difficulty is large, and current ultrasonic leak detector both domestic and external all can only qualitatively judge, and can not carry out the calculating of leakage rate.Traditional halogen detection method uses a large amount of freon, easily causes very large pollution to environment.
Summary of the invention
The object of the invention is to improve traditional perfluor leak detection mode, while reducing halogen use amount, reduce the severe contamination that conventional halogen detection method causes environment, while accurately detecting tiny leakage point, determine leakage class, improve the valve impermeability leak detection efficiency in industry spot.
Technical scheme of the present invention:
Freon valve leak detection new method, the method detection system used comprises by inspection valve, high temperature and high pressure steam operation valve 1, freon reservoir vessel 2, freon operation valve 3, row steam valve 4, air extractor 5, air-cooling apparatus 6, condensate water operation valve 7, gas-liquid separation device 8 and halogen detector 9, high temperature and high pressure steam operation valve 1 is installed in high temperature and high pressure steam conduit entrance place, the middle part entering high temperature and high pressure steam pipeline is connected with freon reservoir vessel 2, freon operation valve 3 is installed in freon reservoir vessel 2 exit, by examining valve and entering high temperature and high pressure steam pipeline, row's jet chimney is connected, connected mode is by the structures shape by inspection valve, near being subject to inspection valve location on row steam valve 4 row of being arranged on jet chimney, air extractor 5 front end distance is not more than 3mm by the distance of inspection valve surface check point, air-cooling apparatus 6 is integrated with air extractor 5 to be connected, air flow through air cooling device 6, the gas be extracted in air extractor 5 is fully cooled, gas-liquid separation device 8 is arranged on the end of air extractor 5, condensate water operation valve 7 is installed in the bottom of gas-liquid separation device 8, the probe of halogen detector 9 presses close to the lower edge of gas-liquid separation device 8 gas outlet, the horizontal range of probe and gas outlet is for being not more than 3mm.
Freon valve leak detection new method, in traditional detection working medium be all freon basis on, propose high-temperature high-pressure steam and carry the new detecting method of freon as working medium, freon and high-temperature high-pressure steam concentration ratio are 1:10, the method increase the pressure of inspection working medium, decrease the pollution to environment, accurate detection is by inspection valve tiny leakage point, for defining the level by inspection valve leakage automatic inspection, in traditional detection working medium be all freon basis on, add air-cooling apparatus 6 and gas-liquid separation device 8.Freon is utilized to can be used as the principle of trace particle, first pass into freon by freon operation valve 3, high-temperature high-pressure steam is passed into again by high temperature and high pressure steam operation valve 1, freon and high-temperature high-pressure steam concentration ratio are 1:10, the mixed gas of high-temperature high-pressure steam and freon enters by examining valve, air extractor 5 is used to bleed to carrying out multiple spot substep by inspection valve surface, the mixed gas extracted enters in air-cooling apparatus 6 and cools, in mixed gas, water vapour is condensed into aqueous water, aqueous water and freon enter gas-liquid separation device 8 subsequently, wherein aqueous water is discharged through condensate water operation valve 7, halogen detector 9 carries out last qualitative detection at gas-liquid separation device 8 gas outlet place and determines leakage class.
Effect of the present invention and benefit are: adopt high-temperature high-pressure steam to carry the pattern of freon tracer gas, freon and high-temperature high-pressure steam concentration ratio are 1:10, increase the pressure of inspection working medium, can detect more small leak source; Carry out three-dimensional multiple spot substep to valve surface to bleed, ensure that accuracy of detection; Decreasing the use amount of freon perfluor detection more in the past, reducing because all using Freon gas to carry out detecting the severe contamination caused; While accurate locating leaks point is come to the detection of tracer gas freon, the relation between research trace gas concentration and valve leak grade, and then determine leakage class; Add cooling device and gas-liquid separation device, avoid impact detector accuracy of detection caused because vapor (steam) temperature is too high.
Accompanying drawing explanation
Accompanying drawing is the whole detection process schematic of freon valve of the present invention leak detection new method.
In figure: 1 high temperature and high pressure steam operation valve; 2 freon reservoir vessels; 3 freon operation valves; 4 row's steam valves; 5 air extractors; 6 air-cooling apparatuses; 7 condensate water operation valves; 8 gas-liquid separation devices; 9 halogen detectors.
Embodiment
The specific embodiment of the present invention is described in detail below in conjunction with technical scheme and accompanying drawing.
The course of work of the present invention is as follows: arrange by device schematic diagram, by the outlet of the alignment probe gas-liquid separation device 8 of halogen detector 9, because Freon gas density ratio air is large, so the probe of halogen detector 9 will press close to the lower edge of gas-liquid separation device 8 gas outlet, the probe of halogen detector 9 and the horizontal range of gas-liquid separation device 8 gas outlet are for being not more than 3mm.Open high temperature and high pressure steam operation valve 1, row's steam valve 4 and by inspection valve, close freon operation valve 3 simultaneously, pass into high-temperature high-pressure steam drain air in device to entering high temperature and high pressure steam pipeline.Close high temperature and high pressure steam operation valve 1 subsequently, after pressure recover in device is normal, closes by inspection valve and row's steam valve 4, open freon operation valve 3, after passing into freon, close freon operation valve 3.Subsequently, open high temperature and high pressure steam operation valve 1, pass into high-temperature high-pressure steam, freon and high-temperature high-pressure steam concentration ratio are 1:10, open by inspection valve after freon and high-temperature high-pressure steam mix, use air extractor 5 to bleed to carrying out multiple spot substep by inspection valve surface, air extractor 5 front end must not be removed at once simultaneously, stop slowly movement afterwards in 3 seconds, and distance is subject to the distance of the Surface testing point of inspection valve to be not more than 3mm.If by inspection valve leak, the gas so extracted is high-temperature water vapor, freon mixed gas.Subsequently, mixed gas is cooled by ventilating air in air-cooling apparatus 6, wherein water vapour is condensed into aqueous water, aqueous water and freon enter in gas-liquid separation device 8 subsequently, aqueous water is discharged by condensate water operation valve 7, the freon of discharging from gas-liquid separation device 8 gas outlet is drawn into halogen detector 9 and detects, halogen detector 9 is sounded a buzzer, leakage rate is defined the level by the number bright according to halogen detector 9 alarm lamp, for the halogen leak detector of ITE-5650A-FP model, be divided into one to seven grades altogether, namely then leakage rate is maximum for bright seven of alarm lamp, be defined as seven grades of leakages.If do not leaked by inspection valve, then halogen leak detector 9 alarm lamp presses primary frequency flicker, can not sound a buzzer.
Claims (1)
1. a freon valve leak detection new method, it is characterized in that, the method detection system used comprises by inspection valve, high temperature and high pressure steam operation valve, freon reservoir vessel, freon operation valve, row steam valve, air extractor, air-cooling apparatus, condensate water operation valve, gas-liquid separation device and halogen detector, high temperature and high pressure steam operation valve is installed in high temperature and high pressure steam conduit entrance place, the middle part entering high temperature and high pressure steam pipeline is connected with freon reservoir vessel, freon operation valve is installed in freon reservoir vessel exit, by examining valve and entering high temperature and high pressure steam pipeline, row's jet chimney is connected, connected mode is by the structures shape by inspection valve, row's steam valve is arranged on row's jet chimney near being subject to inspection valve location, air extractor front end distance is not more than 3mm by the distance of inspection valve surface check point, air-cooling apparatus is integrated with air extractor to be connected, air flow through air cooling device, the gas be extracted in air extractor is fully cooled, gas-liquid separation device is arranged on the end of air extractor, condensate water operation valve is installed in the bottom of gas-liquid separation device, the probe of halogen detector presses close to the lower edge of gas-liquid separation device gas outlet, the horizontal range of probe and gas outlet is for being not more than 3mm, described freon is the freon of pyrochemistry stable in properties, and as freon R134a, concrete grammar is as follows:
Utilize freon as trace particle, first pass into freon by freon operation valve, high-temperature high-pressure steam is passed into again by high temperature and high pressure steam operation valve, freon and high-temperature high-pressure steam concentration ratio are 1:10, the mixed gas of high-temperature high-pressure steam and freon enters by examining valve, air extractor is used to bleed to carrying out multiple spot substep by inspection valve surface, the mixed gas extracted enters in air-cooling apparatus and cools, in mixed gas, water vapour is condensed into aqueous water, aqueous water and freon enter gas-liquid separation device subsequently, wherein aqueous water is discharged through condensate water operation valve, halogen detector carries out last qualitative detection at gas-liquid separation device gas outlet place and determines leakage class.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510184162.XA CN104913886B (en) | 2015-04-17 | 2015-04-17 | Method for leakage detection of Freon valve |
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| CN201510184162.XA CN104913886B (en) | 2015-04-17 | 2015-04-17 | Method for leakage detection of Freon valve |
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| CN104913886A true CN104913886A (en) | 2015-09-16 |
| CN104913886B CN104913886B (en) | 2017-05-17 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105319021A (en) * | 2015-10-30 | 2016-02-10 | 北京新能源汽车股份有限公司 | Battery pack seal detection method and system |
| CN107655637A (en) * | 2016-07-26 | 2018-02-02 | 中国辐射防护研究院 | The pulsed halogen gas detection method and equipment of a kind of iodine adsorber leak detection |
| CN108254131A (en) * | 2018-01-10 | 2018-07-06 | 江苏索普（集团）有限公司 | A kind of on-line checking gas leak device |
| CN110107984A (en) * | 2019-04-29 | 2019-08-09 | 广东美的制冷设备有限公司 | Coolant leakage control method, system and the air-conditioning of air-conditioning |
| CN110411676A (en) * | 2019-07-15 | 2019-11-05 | 合肥通用机械研究院有限公司 | A kind of valve leak amount detecting device |
| CN110411735A (en) * | 2019-07-15 | 2019-11-05 | 合肥通用机械研究院有限公司 | A kind of Subzero valve simulation duty testing device |
| CN110954285A (en) * | 2018-10-09 | 2020-04-03 | 新疆大全新能源股份有限公司 | Method for detecting leakage of Freon evaporator |
| CN112611524A (en) * | 2020-11-20 | 2021-04-06 | 华能上海燃机发电有限责任公司 | Method for improving cooling effect of generator outgoing line sleeve |
| CN113029455A (en) * | 2021-02-23 | 2021-06-25 | 北京星际荣耀空间科技股份有限公司 | Measuring system for leakage rate of aeroengine installation edge |
| CN113405740A (en) * | 2021-06-21 | 2021-09-17 | 北京卫星环境工程研究所 | Fluoride leakage detection equipment and detection method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105319021A (en) * | 2015-10-30 | 2016-02-10 | 北京新能源汽车股份有限公司 | Battery pack seal detection method and system |
| CN107655637A (en) * | 2016-07-26 | 2018-02-02 | 中国辐射防护研究院 | The pulsed halogen gas detection method and equipment of a kind of iodine adsorber leak detection |
| CN108254131A (en) * | 2018-01-10 | 2018-07-06 | 江苏索普（集团）有限公司 | A kind of on-line checking gas leak device |
| CN110954285A (en) * | 2018-10-09 | 2020-04-03 | 新疆大全新能源股份有限公司 | Method for detecting leakage of Freon evaporator |
| CN110107984A (en) * | 2019-04-29 | 2019-08-09 | 广东美的制冷设备有限公司 | Coolant leakage control method, system and the air-conditioning of air-conditioning |
| CN110411676A (en) * | 2019-07-15 | 2019-11-05 | 合肥通用机械研究院有限公司 | A kind of valve leak amount detecting device |
| CN110411735A (en) * | 2019-07-15 | 2019-11-05 | 合肥通用机械研究院有限公司 | A kind of Subzero valve simulation duty testing device |
| CN112611524A (en) * | 2020-11-20 | 2021-04-06 | 华能上海燃机发电有限责任公司 | Method for improving cooling effect of generator outgoing line sleeve |
| CN113029455A (en) * | 2021-02-23 | 2021-06-25 | 北京星际荣耀空间科技股份有限公司 | Measuring system for leakage rate of aeroengine installation edge |
| CN113405740A (en) * | 2021-06-21 | 2021-09-17 | 北京卫星环境工程研究所 | Fluoride leakage detection equipment and detection method |
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| CN104913886B (en) | 2017-05-17 |
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