CN105651565A - Field sampling device for SF6 gas analysis - Google Patents
Field sampling device for SF6 gas analysis Download PDFInfo
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- CN105651565A CN105651565A CN201511009099.2A CN201511009099A CN105651565A CN 105651565 A CN105651565 A CN 105651565A CN 201511009099 A CN201511009099 A CN 201511009099A CN 105651565 A CN105651565 A CN 105651565A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2226—Sampling from a closed space, e.g. food package, head space
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Abstract
The invention relates to a field sampling device for SF6 gas analysis. The invention is characterized in that the sampling device comprises a vacuum-pumping device and a gas fetching tank; the vacuum-pumping device is an instrument box equipped with a miniature vacuum pump and gas circuit switching system, a pressure display system and an electrical system; the vacuum pump is connected to a three-way valve through a connecting pipe; the other two paths of the three-way valve are connected to a helium purging gas path and a gas fetching tank gas path so as to communicate with corresponding gas paths through switching of the three-way valve; according to the pressure display system, pressure in the system is measured by the adoption of a pressure gage arranged on the gas fetching tank gas path; the gas fetching tank is a pressure container, and the upper part of the tank is provided with a gas inlet pipe and a gas outlet pipe; the gas inlet pipe is connected to a tank three-way valve, and the gas outlet pipe is connected to a stop valve; when vacuumizing the gas fetching tank, the other two paths of the tank three-way valve are connected to the vacuum-pumping device and an emptying gas path; during sampling, the other two paths of the tank three-way valve are connected to GIS equipment and the emptying gas path; and the stop valve is connected to a gas chromatograph.
Description
Technical field
The present invention relates to the sampling apparatus of a kind of gas chromatograph, particularly open one is for SF6The spot sampling device of gas analysis, it is possible to be easy to take scene to, takes gas from GIS device and stores, and is applicable not only to the situation that spot sampling is analyzed, is also applied for lab analysis sample collecting.
Background technology
SF6There is the arc extinction performance of good electrical insulation properties and excellence. Its electric strength is 2.5 times of nitrogen under same pressure, and breakdown voltage is 2.5 times of air, and arc extinguishing ability is 100 times of air, is a kind of supertension insulating dielectric materials of new generation being better than between air and oil. Electrical industry utilizes its significantly high dielectric strength and good arc performance of going out, as the insulant of high-voltage switch gear, high-power transformer, high tension cable and gas. Conventional chromatographic SF in test6The content of the gas produced due to various reactions in insulation gas. But GIS device is distributed in each scene, equipment dispersion and substantial amounts, carries out independent sample collecting for the equipment having situation and analysis is the important means whether detection GIS device is abnormal. SF in GIS device6Comprising various sulfide and fluoride in catabolite, some products easily decompose and adsorb, so in sampling process, it is prevented that the entrance of air and the absorption preventing characteristic gas are two important problems. Therefore, it is necessary for arranging a set of special sampler, and it should prevent from causing decomposition product in inclusion of air sample gas, has good anti-adsorptivity again, enables the gas of trace to be detected by gas chromatograph.
Summary of the invention
Present invention aim to address the defect of prior art, design one is for SF6The spot sampling device of gas analysis, designs exclusively for GIS device, it is possible to the SF in collection site GIS device6Sample gas, sample effect is good, and is easy to carry.
The present invention is achieved in that a kind of for SF6The spot sampling device of gas analysis, it is characterized in that: described sampling apparatus includes vacuum extractor and takes gas tank, described vacuum means is set to one equipped with minipump and gas circuit switched system, the instrument box of pressure display system and Circuits System, described vacuum pump connects a three-way valve by connecting tube, what described three-way valve two other road connected is helium purge gas circuit and takes gas tank gas circuit, corresponding gas circuit is connected by the switching of three-way valve, described pressure display system adopts the pressure condition being arranged in the gauge measurement system taken in gas tank gas circuit, the described gas tank that takes is pressure vessel, tank body top is provided with air inlet pipe and escape pipe, described air inlet pipe connects a tank body three-way valve, described escape pipe connects a stop valve, to take gas tank carry out evacuation work time, what described tank body three-way valve two other road connected is vacuum extractor and emptying gas circuit, when carrying out sampling work, what described tank body three-way valve two other road connected is GIS device and emptying gas circuit, and described stop valve connects gas chromatograph.
Described Circuits System includes 220V power input interface and vacuum pump switch, and described instrument box is configured with stainless steel faceplate, distribution pressure table on panel, three-way valve valve handle, power input interface, air-path interface and vacuum pump switch. Described Pressure gauge is vacuum table.
The described gas tank that takes is cylinder pressure container, and tank interior is through polishing, cleaning and anti-adsorption treatment. The described gas tank that takes adopts 316L rustless steel to make tank body, tank body thickness is 2.5mm, inside diameter is 70mm, height 100mm, volume is 0.36L, air inlet pipe that described tank body top is arranged and escape pipe are stretch out tank body 40mm and gas circuit pipe that external diameter is 6mm, and air inlet pipe length in tank body is 80mm, and escape pipe length in tank body is 20mm.
Described vacuum pump is fixed on bottom instrument box, and is furnished with cushion.
It is so operation when the present invention works: first under lab carry out evacuation purge to taking gas tank, switch on power, tank body three-way valve is chosen and is taken gas tank and be connected with vacuum extractor, the stop valve of tank body is closed, after being extracted into setting negative pressure, switching gas circuit utilizes helium purge, the stop valve of tank body is opened, so 2��3 times repeatedly, guarantee that taking gas in gas tank (including the gas in the connecting line taking between gas tank and vacuum extractor) all removes, tank body three-way valve is in closed tank state, stop valve is closed, to keep the negative pressure taking in gas tank. during field investigation and sampling operation, it is necessary to first connect and take gas tank and GIS device, after purging connecting line a period of time by sample gas, rotating vessel three-way valve, the gas in GIS device can take in gas tank owing to pressure differential enters into, until pressure balance. after having sampled, rotating vessel three-way valve, make to take gas tank and be in sealing state, sample end-of-job. when needing sample gas is analyzed, connection takes gas tank and sample gas can be analyzed by correlation analysis equipment.
The invention has the beneficial effects as follows: the present invention designs exclusively for GIS device, it is possible to the SF in collection site GIS device6Sample gas, it is simple to utilize the content of special color spectrometer analysis wherein various components, thus providing powerful foundation to the operation conditions of judgment device, accident analysis. Sampling apparatus of the present invention is reasonable in design, greatly reduces the infiltration of air, effectively prevent the absorption of characteristic component, thus enhancing the reliability analyzing result so that whole chromatography process is more safe and effective. The sample gas gathered is possible not only on portable gas chromatograph to carry out gas analysis, it is also possible to takes back and carries out component analysis on the special color spectrometer of laboratory, largely solves and takes gas difficulty, analyzes difficult problem.
Accompanying drawing explanation
Fig. 1 is that sampling apparatus of the present invention carries out annexation schematic diagram when evacuation works to taking gas tank.
Fig. 2 is that sampling apparatus of the present invention carries out annexation schematic diagram during sampling work.
In figure: 1, instrument box; 2, vacuum pump; 3, three-way valve; 4, Pressure gauge; 5, gas tank is taken; 6, tank body three-way valve; 7, stop valve; 8, emptying gas circuit; 9, helium purge gas circuit; 10, air inlet pipe; 11, escape pipe; 12, GIS device; 13, gas chromatograph.
Detailed description of the invention
With reference to the accompanying drawings 1 and accompanying drawing 2, one of the present invention is used for SF6The spot sampling device of gas analysis includes vacuum extractor and takes gas tank 5, and described vacuum means is set to an instrument box 1 equipped with minipump 2 and gas circuit switched system, pressure display system and Circuits System.Described vacuum pump 2 is fixed on bottom instrument box 1, and is furnished with cushion. Described vacuum pump 2 connects a three-way valve 3 by connecting tube, and what described three-way valve 3 two other road connected is helium purge gas circuit 9 and takes gas tank gas circuit, connects corresponding gas circuit by the switching of three-way valve 3. Described pressure display system adopts the pressure condition being arranged in the Pressure gauge 4 measurement system taken in gas tank gas circuit. Described takes gas tank 5 for pressure vessel, and tank body top is provided with air inlet pipe 10 and escape pipe 11, and described air inlet pipe 10 connects a tank body three-way valve 6, and described escape pipe connects a stop valve 7. To take gas tank carry out evacuation work time, what described tank body three-way valve 6 two other road connected is vacuum extractor and emptying gas circuit 8. When carrying out sampling work, what described tank body three-way valve 6 two other road connected is GIS device 12 and emptying gas circuit 8, and described stop valve 7 connects gas chromatograph 13.
Described Circuits System includes 220V power input interface and vacuum pump switch. Described instrument box 1 is configured with stainless steel faceplate, distribution pressure table on panel, three-way valve valve handle, power input interface, air-path interface and vacuum pump switch. Described Pressure gauge adopts vacuum table, the pressure condition in accurate display system.
Described takes gas tank 5 for cylinder pressure container, and tank interior is through polishing, cleaning and anti-adsorption treatment. The described gas tank 5 that takes adopts 316L rustless steel to make tank body, tank body thickness is 2.5mm, inside diameter is 70mm, height 100mm, volume is 0.36L, air inlet pipe 10 that described tank body top is arranged and escape pipe 11 are stretch out tank body 40mm and gas circuit pipe that external diameter is 6mm, and the air inlet pipe 10 length in tank body is 80mm, and the escape pipe 11 length in tank body is 20mm.
It is so operation when the present invention works: first under lab carry out evacuation purge to taking gas tank 5, switch on power, tank body three-way valve 6 is chosen and is taken gas tank 5 and be connected with vacuum extractor, the stop valve 7 of tank body is closed, after being extracted into setting negative pressure, gas circuit is switched over by three-way valve 3, helium purge gas circuit air inlet, helium is utilized to purge, the stop valve 7 of tank body is opened, so 2��3 times repeatedly, guarantee to take gas in gas tank 5 (including taking the gas in the connecting line between gas tank 5 and vacuum extractor) all to remove, tank body three-way valve 6 is in closed tank state, stop valve 7 is closed, to keep the negative pressure taking in gas tank 5. during field investigation and sampling operation, it is necessary to first connect and take gas tank 5 and GIS device 12, after purging connecting line a period of time by sample gas, rotating vessel three-way valve 6, the gas in GIS device 12 can take in gas tank 5 owing to pressure differential enters into, until pressure balance. after having sampled, rotating vessel three-way valve 6, make to take gas tank 5 and be in sealing state, sample end-of-job. when needing sample gas is analyzed, connection takes gas tank 5 and sample gas can be analyzed by gas chromatograph 13.
Claims (6)
1. one kind is used for SF6The spot sampling device of gas analysis, it is characterized in that: described sampling apparatus includes vacuum extractor and takes gas tank, described vacuum means is set to one equipped with minipump and gas circuit switched system, the instrument box of pressure display system and Circuits System, described vacuum pump connects a three-way valve by connecting tube, what described three-way valve two other road connected is helium purge gas circuit and takes gas tank gas circuit, corresponding gas circuit is connected by the switching of three-way valve, described pressure display system adopts the pressure condition being arranged in the gauge measurement system taken in gas tank gas circuit, the described gas tank that takes is pressure vessel, tank body top is provided with air inlet pipe and escape pipe, described air inlet pipe connects a tank body three-way valve, described escape pipe connects a stop valve,To take gas tank carry out evacuation work time, what described tank body three-way valve two other road connected is vacuum extractor and emptying gas circuit; When carrying out sampling work, what described tank body three-way valve two other road connected is GIS device and emptying gas circuit, and described stop valve connects gas chromatograph.
2. according to claim 1 for SF6The spot sampling device of gas analysis, it is characterized in that: described Circuits System includes 220V power input interface and vacuum pump switch, described instrument box is configured with stainless steel faceplate, distribution pressure table on panel, three-way valve valve handle, power input interface, air-path interface and vacuum pump switch.
3. according to claim 1 and 2 for SF6The spot sampling device of gas analysis, it is characterised in that: described Pressure gauge is vacuum table.
4. according to claim 1 for SF6The spot sampling device of gas analysis, it is characterised in that: the described gas tank that takes is cylinder pressure container, and tank interior is through polishing, cleaning and anti-adsorption treatment.
5. according to claim 1 or 4 for SF6The spot sampling device of gas analysis, it is characterized in that: the described gas tank that takes adopts 316L rustless steel to make tank body, tank body thickness is 2.5mm, inside diameter is 70mm, height 100mm, volume is 0.36L, and air inlet pipe that described tank body top is arranged and escape pipe are stretch out tank body 40mm and gas circuit pipe that external diameter is 6mm, air inlet pipe length in tank body is 80mm, and escape pipe length in tank body is 20mm.
6. according to claim 1 for SF6The spot sampling device of gas analysis, it is characterised in that: described vacuum pump is fixed on bottom instrument box, and is furnished with cushion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511009099.2A CN105651565A (en) | 2015-12-30 | 2015-12-30 | Field sampling device for SF6 gas analysis |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511009099.2A CN105651565A (en) | 2015-12-30 | 2015-12-30 | Field sampling device for SF6 gas analysis |
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| CN105651565A true CN105651565A (en) | 2016-06-08 |
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| CN201511009099.2A Pending CN105651565A (en) | 2015-12-30 | 2015-12-30 | Field sampling device for SF6 gas analysis |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106442029A (en) * | 2016-09-08 | 2017-02-22 | 国网上海市电力公司 | SF6 sampling device for GIS equipment |
| CN106596823A (en) * | 2016-12-22 | 2017-04-26 | 邯郸派瑞节能控制技术有限公司 | Gas sampling and analyzing device and method |
| CN107340338A (en) * | 2016-12-22 | 2017-11-10 | 辽宁卓异装备制造股份有限公司 | A kind of method of energy continuous acquisition cleaning gas sample |
| CN108489925A (en) * | 2018-04-05 | 2018-09-04 | 范宪华 | A kind of instrument with breathing detection Malignant gastrointestinal pathogenic bacteria |
| CN108940136A (en) * | 2018-08-30 | 2018-12-07 | 中国科学院过程工程研究所 | A kind of gas-solid reaction device and method |
| CN110146349A (en) * | 2019-06-06 | 2019-08-20 | 中国气象科学研究院 | A kind of adding pressure type air sampling equipment and its method of sampling |
| CN113835151A (en) * | 2021-09-06 | 2021-12-24 | 中核武汉核电运行技术股份有限公司 | Optical fiber hydrogen-carrying reaction system |
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| CN204575396U (en) * | 2015-03-27 | 2015-08-19 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of SF 6gas sample collecting device for air |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106442029A (en) * | 2016-09-08 | 2017-02-22 | 国网上海市电力公司 | SF6 sampling device for GIS equipment |
| CN106596823A (en) * | 2016-12-22 | 2017-04-26 | 邯郸派瑞节能控制技术有限公司 | Gas sampling and analyzing device and method |
| CN107340338A (en) * | 2016-12-22 | 2017-11-10 | 辽宁卓异装备制造股份有限公司 | A kind of method of energy continuous acquisition cleaning gas sample |
| CN108489925A (en) * | 2018-04-05 | 2018-09-04 | 范宪华 | A kind of instrument with breathing detection Malignant gastrointestinal pathogenic bacteria |
| CN108940136A (en) * | 2018-08-30 | 2018-12-07 | 中国科学院过程工程研究所 | A kind of gas-solid reaction device and method |
| CN108940136B (en) * | 2018-08-30 | 2020-10-16 | 中国科学院过程工程研究所 | Gas-solid reaction device and method |
| CN110146349A (en) * | 2019-06-06 | 2019-08-20 | 中国气象科学研究院 | A kind of adding pressure type air sampling equipment and its method of sampling |
| CN113835151A (en) * | 2021-09-06 | 2021-12-24 | 中核武汉核电运行技术股份有限公司 | Optical fiber hydrogen-carrying reaction system |
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Application publication date: 20160608 |
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