CN108007925B - SF6Method for operating gas decomposition product colorimetric method detector - Google Patents
SF6Method for operating gas decomposition product colorimetric method detector Download PDFInfo
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- CN108007925B CN108007925B CN201711133361.3A CN201711133361A CN108007925B CN 108007925 B CN108007925 B CN 108007925B CN 201711133361 A CN201711133361 A CN 201711133361A CN 108007925 B CN108007925 B CN 108007925B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
- G01N21/783—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour for analysing gases
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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Abstract
The invention discloses an SF 6 gas decomposer colorimetric method detector which comprises a gas pressure stabilizing unit, a flow controller, a gas path selection valve, a reference gas path channel, a colorimetric tube channel, a flowmeter, a display device and a system control unit, wherein the system control unit is respectively connected with the flow controller, the gas path selection valve, the flowmeter and the display device, the gas pressure stabilizing unit, the flow controller and the gas path selection valve are sequentially connected, the reference gas path channel and the colorimetric tube channel are connected to the gas path selection valve, the gas path selection valve controls the flow direction of a gas path, the reference gas path channel and the colorimetric tube channel are led to the flowmeter, and gas is accessed by the gas pressure stabilizing unit. The detector can carry the colorimetric tube detection method to the site in a portable mode through automatic control of flow and automatic calculation and control of gas volume, and solves the problems that the sample gas is easily affected by the outside, the sample gas is not strong in representativeness, the flow is unstable and the gas consumption is not accurate enough.
Description
Technical Field
The invention relates to a detection device, in particular to a colorimetric detector for SF 6 gas decomposers.
Background
An electrical device using SF 6 gas as an insulating medium is called an SF6 electrical device. The device comprises a circuit breaker, a transformer, a lightning arrester, a capacitor, an isolation disconnecting link, a grounding disconnecting link, a sleeve, a bus and the like. The SF 6 gas is nonflammable and explosion-proof, so that the gas has stable chemical property and excellent electrical property. Therefore, the fully sealed combined electrical appliance, called GIS for short, using SF 6 gas as insulation is widely applied since the last 80 th century, and is widely applied since the last century. According to incomplete statistics, hundreds of thousands of national SF6 electrical equipment are becoming the main equipment of the power system.
However, due to the defects in design, materials, process, maintenance and the like, the existing test method is difficult to detect, so that hidden danger possibly exists in equipment to bring into system operation, hidden danger is continuously developed under the action of heat and electricity, SF6 gas and solid insulating materials in a fault area are decomposed, the insulating performance is continuously reduced, even accidents are caused, and the safe and economic operation of power production is seriously influenced. Therefore, scholars at home and abroad propose to diagnose the internal faults of SF6 electrical equipment through the contents of components such as the decomposition products SO2, H2S, CO and the like. The current method for detecting SF6 gas decomposition products mainly comprises a weighing method, a chromatographic method, an infrared method, an electrochemical method, a colorimetric method and the like, wherein the weighing method and the chromatographic method are basically used in a laboratory, the infrared method has the advantages of high detection cost, low resolution and poor precision, an electrochemical method sensor is greatly influenced by the outside, the treatment difficulty of cross interference is high, the self-attenuation is serious, the colorimetric method is a quantitative detection method which is simpler, has low cost and consumes less gas, the sample gas is easily influenced by the outside by the traditional colorimetric tube detection method, the sample gas is not strong in representativeness, the flow is difficult to stabilize, the gas consumption is difficult to be accurate, and the current detector which is not controlled by the flow and the volume of the detected gas is not used.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a method for ensuring stable gas flow in the detection process and accurate gas flow through a colorimetric tube, wherein the detection data of the detection components can be read through scales corresponding to the color-changing length in the colorimetric tube; and judging the running state of the tested equipment according to the detection data by using the SF 6 gas decomposition product colorimetric method detector.
The utility model provides a SF 6 gaseous decomposition thing colorimetric method detector, includes gas steady voltage unit, flow controller, gas circuit selection valve, reference gas circuit passageway, cuvette passageway, flowmeter, display device and system control unit, system control unit link to each other with flow controller, gas circuit selection valve, flowmeter and display device respectively, gas steady voltage unit, flow controller, gas circuit selection valve connect gradually, reference gas circuit passageway and cuvette passageway all are connected in the circulation direction of gas circuit selection valve by gas circuit selection valve control gas circuit, reference gas circuit passageway and cuvette passageway all lead to the flowmeter, gas is inserted by gas steady voltage unit, the reference gas circuit passageway that detects gas and flow is carried out the presetting of gas circuit in the device earlier and the washing of cuvette passageway, then by gas circuit selection valve automatic switch-over to cuvette passageway.
In summary, compared with the prior art, the invention has the following advantages:
The detector can carry the colorimetric tube detection method to the site in a portable mode through automatic control of flow and automatic calculation and control of gas volume, and solves the problems that the sample gas is easily affected by the outside, the sample gas is not strong in representativeness, the flow is unstable and the gas consumption is not accurate enough. The detection gas firstly flows into a reference gas path channel in the device to perform flow presetting and gas path cleaning, so that the gas flowing into the colorimetric tube during detection is the gas in the device; the gas flow can be stabilized at 2% of the preset flow through PID modulation of the device system, the device system automatically calculates the volume flowing into the colorimetric tube after entering the colorimetric tube for detection, and the gas circuit is automatically switched and the detection is stopped after the volume of the preset gas flow is reached. And observing the scale value corresponding to the color change length of the color-developing agent in the colorimetric tube, namely the detection data of the detection components of the colorimetric tube. The detector has the advantages of easy carrying, convenient operation, low air consumption, no interference from on-site electric field, magnetic field, noise and other environmental factors, and is very suitable for on-site application. The device has low cost, is easy to popularize and popularize, can be popularized by power supply companies at and above the city level and county level in China, is configured with 3 units, is necessary to be equipped with important 110kV transformer substations and 220kV transformer substations and above, and has domestic market demands of tens of thousands. When operators of the transformer substation find that the equipment is abnormal, the instrument can be used for detecting immediately, diagnosing the state of the equipment rapidly, providing scientific basis for equipment maintenance, having broad application prospect and bringing good social and economic benefits.
Drawings
FIG. 1 is a schematic structural diagram of a colorimetric detector for SF 6 gas decomposition products of the present invention.
The reference numerals indicate a system control unit of a gas pressure stabilizing unit 1, a flow controller 2, a gas path selection valve 3, a reference gas path channel 4, a flowmeter 5, a display device 6 and a colorimetric tube channel 7.
Detailed Description
The present invention will be described in more detail with reference to examples.
Example 1
The utility model provides a SF 6 gaseous decomposition thing colorimetric method detector, includes gas pressure stabilizing unit, flow controller, gas circuit selection valve, reference gas circuit passageway, cuvette passageway, flowmeter, display device and system control unit, system control unit link to each other with flow controller, gas circuit selection valve, flowmeter respectively, the display device is connected gradually to gas pressure stabilizing unit, flow controller, gas circuit selection valve, reference gas circuit passageway and cuvette passageway all are connected in the circulation direction of gas circuit selection valve by gas circuit selection valve control gas circuit, reference gas circuit passageway and cuvette passageway all lead to the flowmeter, gas is inserted by gas pressure stabilizing unit.
During instrument detection, detected gas flows into a flow controller 2 through a gas pressure stabilizer unit 1-a gas pressure stabilizer, enters a gas path selection valve 3, flows into a reference gas path channel 4, flows into a flowmeter 5 and is discharged, after the flow is stable and reaches the preset gas path cleaning time, the gas path selection valve 3 is switched to a colorimetric tube channel to enter a colorimetric tube 7, the gas flows into the colorimetric tube according to the set flow, and after the set gas consumption is reached, the detection is automatically stopped, the length of color change of a color developing agent in the colorimetric tube is observed, and the detection data of a decomposition product is read.
The device sets flow and air consumption through the display device 6, and the system control unit 8 controls the flow controller 2 and the air passage selection valve 3 to work, so that the whole detection process is automated.
The display device 6 is a liquid crystal screen with a touch technology, so that man-machine interaction is realized; the device system control unit 8 controls the display device 6, the flow controller 2 and the gas path selector valve 3. The system collects data of internal pressure, temperature and flow of the device, processes the internal data, performs PID control on the flow, performs accumulation calculation on the gas volume, and controls according to instructions and related parameters through related contents of the liquid crystal display device, setting various parameters and detecting operation.
The above-described embodiments are provided for illustration only and various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention, but all equivalent technical solutions shall fall within the scope of the invention, which is defined by the claims.
The undescribed portion of this embodiment is identical to the prior art.
Claims (1)
1. An operation method of an SF 6 gas decomposer colorimetric method detector is characterized in that: the system control unit is respectively connected with the flow controller, the gas path selection valve, the flowmeter and the display device, the gas pressure stabilizing unit, the flow controller and the gas path selection valve are sequentially connected, the reference gas path channel and the colorimetric tube channel are both connected to the gas path selection valve, the gas path selection valve controls the flow direction of the gas path, the reference gas path channel and the colorimetric tube channel are both led to the flowmeter, the gas is accessed by the gas pressure stabilizing unit, the reference gas path channel in the device is firstly detected to carry out flow presetting and gas path cleaning, and then the gas path selection valve is used for automatically switching to the colorimetric tube channel, and the system control unit comprises the following specific steps:
When the instrument detects, the detected gas flows into the flow controller through the gas pressure stabilizing unit, enters the gas path selection valve, flows into the reference gas path channel, flows into the flowmeter and is discharged, when the flow is stable and reaches the preset gas path cleaning time, the gas path selection valve is switched to the colorimetric tube channel to enter the colorimetric tube, the gas flows into the colorimetric tube according to the set flow, the detection is automatically stopped after the set gas consumption is reached, the color change length of the color developing agent in the colorimetric tube is observed, and the detection data of the decomposed product is read.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711133361.3A CN108007925B (en) | 2017-11-16 | 2017-11-16 | SF6Method for operating gas decomposition product colorimetric method detector |
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| CN201711133361.3A CN108007925B (en) | 2017-11-16 | 2017-11-16 | SF6Method for operating gas decomposition product colorimetric method detector |
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| CN108007925B true CN108007925B (en) | 2024-06-28 |
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| CN111323547A (en) * | 2020-04-09 | 2020-06-23 | 国家电网有限公司 | A GIS gas chamber decomposition product detection device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101813653A (en) * | 2010-04-20 | 2010-08-25 | 常州爱特科技有限公司 | Double-channel SF6 gas decomposition product tester |
| CN207623240U (en) * | 2017-11-16 | 2018-07-17 | 国网福建省电力有限公司泉州供电公司 | Colorimetric tube detection device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CA1257185A (en) * | 1985-09-06 | 1989-07-11 | Jean-Marie Braun | Gas decomposition detector for gas-insulated electrical apparatus |
| JPH09127039A (en) * | 1995-11-06 | 1997-05-16 | Nippon Telegr & Teleph Corp <Ntt> | Electrochemical detector and its manufacture |
| KR100427563B1 (en) * | 1999-04-16 | 2004-04-27 | 가부시키가이샤 후지킨 | Parallel bypass type fluid feeding device, and method and device for controlling fluid variable type pressure system flow rate used for the device |
| US7743928B2 (en) * | 2002-09-07 | 2010-06-29 | Timothy Crowley | Integrated apparatus and methods for treating liquids |
| CN101368921B (en) * | 2008-09-08 | 2011-11-16 | 无锡尚沃生物科技有限公司 | High sensitivity and high-selective gas transducer |
| CN101363893B (en) * | 2008-09-28 | 2011-11-16 | 北京航空航天大学 | Hand-hold GIS air chamber failure testing instrument |
| CN202304897U (en) * | 2011-11-07 | 2012-07-04 | 福建亿榕信息技术有限公司 | On-line monitoring system for SF6 electrical equipment |
| CN103412245B (en) * | 2013-06-27 | 2016-03-23 | 厦门加华电力科技有限公司 | Sulfur hexafluoride electrical equipment hydrogen detector and using method thereof |
| CN203929456U (en) * | 2013-12-25 | 2014-11-05 | 国家电网公司 | Sulfur hexafluoride gas sampling detecting device |
| CN203929726U (en) * | 2014-05-21 | 2014-11-05 | 厦门加华电力科技有限公司 | Sulfur hexafluoride gas gas chromatography comprehensive detector |
| US11237159B2 (en) * | 2016-03-23 | 2022-02-01 | Agency For Science, Technology And Research | Surface enhanced Raman spectroscopy (SERS) microfluidics biosensor for detecting single and/or multiple analytes |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101813653A (en) * | 2010-04-20 | 2010-08-25 | 常州爱特科技有限公司 | Double-channel SF6 gas decomposition product tester |
| CN207623240U (en) * | 2017-11-16 | 2018-07-17 | 国网福建省电力有限公司泉州供电公司 | Colorimetric tube detection device |
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