CN108731880B - SF in high-voltage insulation equipment6Gas detection method and system - Google Patents
SF in high-voltage insulation equipment6Gas detection method and system Download PDFInfo
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- CN108731880B CN108731880B CN201810416830.0A CN201810416830A CN108731880B CN 108731880 B CN108731880 B CN 108731880B CN 201810416830 A CN201810416830 A CN 201810416830A CN 108731880 B CN108731880 B CN 108731880B
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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
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
Abstract
The invention relates to the technical field of fault gas detection of electrical equipment, in particular to SF (sulfur hexafluoride) in high-voltage insulating equipment6Gas detection methods and systems; the technical scheme mainly comprises the following steps of S1:adding an aqueous solution into a first detection box, and fixedly mounting a pH test paper in the first detection box, wherein the pH test paper is soaked in the aqueous solution; s2: the first detection box is communicated to a sealing connection port of the high-voltage insulation equipment, and the pipeline is in sealing connection with the high-voltage insulation equipment; s3: and a camera is arranged in the first detection box, the pH test paper is photographed, and the photograph is transmitted to the display terminal. S4: and comparing the color of the pH test paper in the picture with that of a standard color comparison card. Gas flows into a first detection chamber, SF6Dissolving gas and its decomposition product in water solution to change pH value of the water solution, and comparing pH test paper with standard color comparison card to determine SF6Whether the gas leaks.
Description
Technical Field
The invention relates to the technical field of fault gas detection of electrical equipment, in particular to SF (sulfur hexafluoride) in high-voltage insulating equipment6A gas detection method and system.
Background
Sulfur hexafluoride (SF)6) In the electrical industry as insulation for high-voltage switches, large-variable transformers, high-voltage cables and gases. During operation of these devices, SF in the devices6The gas is decomposed under the action of high-temperature electric arc, and the decomposition comprises sulfur-containing compounds and other compounds, such as SF4(Sulfur tetrafluoride), S2F2(Sulfur fluoride), SOF2(thionyl fluoride) and the like, thereby quantitatively detecting SF6The gas and its decomposition products can be used to diagnose faults and defects in electrical equipment.
For example, chinese patent with publication number CN105865556A discloses an SF in a GIS device6The method for detecting the gas leakage amount is characterized in that a gas flow velocity measuring instrument is arranged at a position close to a flange or a position with a sealing joint and can transmit the leakage flow velocity back to an industrial personal computer for remote monitoring; by measuring SF in GIS pipelines6The gas flow rate is converted into SF according to the inner diameter of the equipment, the ambient temperature and the leakage time by the special software of the industrial personal computer6The amount of gas leakage.
The detection method can be used for detecting SF in the GIS6The gas leakage amount is monitored in real time, the total leakage amount of the equipment from operation is calculated, the system can give an alarm in time and prompt operating personnel to handle the leakage amount, the shutdown of the equipment caused by gas leakage is avoided, the safe and reliable operation of the equipment is ensured, meanwhile, the environmental protection supervision is facilitated, and the emission of greenhouse gases is controlled.
But the detection method is in the detection processMore equipment is needed in the process, such as gas flow rate detector, environmental thermometer, SF6The gas pressure meter, the data processor, the industrial personal computer and other equipment which perform gas flow conversion according to flow velocity have high detection cost, and further the research of SF in high-voltage insulating equipment can be carried out6Simple detection method for gas leakage, and further SF reduction6The cost of detecting gas leaks.
Disclosure of Invention
In view of the disadvantages of the prior art, a first object of the present invention is to provide an SF for high voltage insulation equipment6Gas detection method with SF application to high voltage insulation6Gas leakage is detected, and detection cost is lower.
In order to achieve the purpose, the invention provides the following technical scheme: SF in high-voltage insulation equipment6A gas detection method comprising the steps of:
s1: adding an aqueous solution into a first detection box, and fixedly mounting a pH test paper in the first detection box, wherein the pH test paper is soaked in the aqueous solution;
s2: the first detection box is communicated to a sealed connection port of the high-voltage insulation equipment through a pipeline, and the pipeline and the high-voltage insulation equipment are arranged in a sealed connection mode;
s3: installing a camera in the first detection box, taking pictures of the pH test paper in the first detection box at regular time through the camera, and transmitting the pictures to a display terminal;
s4: comparing the color of the pH test paper in the picture with that of a standard color comparison card, and judging SF in high-voltage insulating equipment6Whether gas is leaked.
By adopting the technical scheme, SF in high-voltage insulation equipment6Leakage of gas occurs, the leaked gas flows into the first detection box from the sealed connection port of the high-voltage insulation equipment, and SF6Gases and their decomposition products, e.g. SF4、S2F2、SOF2When the gas is partially dissolved in the aqueous solution, the pH value of the aqueous solution is changed, the color of the pH test paper can be changed, and the camera canRegularly shoot the pH test paper in the first detection case, make things convenient for the staff to carry out the colour contrast with standard color comparison card with the photo of gathering to judge the SF in the high voltage insulation equipment6Whether the gas leaks.
A second object of the invention is to provide an SF in a high voltage insulation device6Gas detection system capable of SF for high voltage insulated equipment6Gas leaks are detected for disposal.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a gaseous detecting system of SF6 in high-voltage insulation equipment, is including the first detection case that communicates in high-voltage insulation equipment's sealing connection mouth department, the gas outlet of first detection case communicates the absorption box that a plurality of was equipped with alkaline absorption liquid in proper order.
By adopting the technical scheme, leaked SF6The gas and its decomposition products flow from the first detection tank to the absorption tank, and the alkaline absorption liquid can react with SF6The gas and the gas generated by the decomposition of the gas are subjected to primary absorption treatment, so that the later gas purification treatment work is facilitated.
The invention is further provided with a second detection box communicated with the gas outlet of the last absorption box through which gas flows, wherein the second detection box is provided with an observation port; and adding a water solution into the second detection box, wherein a pH test paper is fixedly arranged in the second detection box, and the pH test paper is soaked in the water solution.
By adopting the technical scheme, the residual gas flows into the second detection box and is partially dissolved in the aqueous solution, so that the pH value of the aqueous solution is changed, the color of the pH test paper is changed, the color change of the pH test paper in the second detection box is observed through the observation port, the color comparison is carried out on the pH test paper and the standard colorimetric card, and then the alkaline absorption liquid is judged to compare the color of the SF by using the alkaline absorption liquid6Absorption of gases and their decomposition products.
The invention is further provided that the first detection box and the second detection box are both arranged in a transparent manner.
By adopting the technical scheme, the transparent detection box is convenient for workers to observe the internal condition of the detection box.
The invention is further provided with a camera which is used for shooting the pH test paper in the second detection box at regular time.
Adopt above-mentioned technical scheme, the camera can be regularly shot by the pH test paper in the second detection case, and the photo that the staff will gather carries out the colour contrast with standard colorimetric card, and then judges that alkaline absorption liquid absorbs the effect to SF6 gas and the gas that its decomposition produced, has improved the intellectuality of device.
The invention is further provided that the air outlet of the second detection box is communicated with a tail gas collecting box.
By adopting the technical scheme, the tail gas collecting box is used for collecting the residual tail gas, so that the residual tail gas is treated in the later stage of the staff, the residual tail gas is prevented from being directly discharged to the outside, and the harm to the external environment is avoided.
The invention is further provided that the alkaline absorption liquid is potassium hydroxide solution, and the potassium hydroxide solution with the same amount is respectively and correspondingly added into a plurality of absorption boxes.
By adopting the technical scheme, the SF6Gas and SF6The gas decomposition product has stable chemical property, and needs a series of reaction conditions of high temperature, catalyst and the like when reacting with other alkaline solutions such as sodium hydroxide, calcium hydroxide and the like, and the potassium hydroxide solution is used for SF6Of gas and SF6The absorption effect of partial products of gas decomposition is better, and the reaction condition is simpler.
In summary, the invention mainly has the following beneficial effects:
1. when insulating high voltage equipment from SF6Leakage of gas occurs, the leaked gas flows into the first detection box from the sealed connection port of the high-voltage insulation equipment, and SF6Gases and their decomposition products, e.g. SF4、S2F2、SOF2Wait gaseous part and dissolve in aqueous solution for the pH valve of aqueous solution changes, and then can make pH test paper colour change, and the camera can regularly shoot the pH test paper in the first detection case, makes things convenient for the staff to advance the photo of gathering with standard color comparison cardColor contrast to determine SF in high voltage insulation equipment6Whether gas is leaking;
2. leaked SF6The gas and its decomposition products flow from the first detection tank to the absorption tank, and the alkaline absorption liquid can react with SF6The gas and the gas generated by the decomposition of the gas are subjected to primary absorption treatment, so that the purification treatment work at the later stage is facilitated.
Drawings
FIG. 1 is a schematic view of a connection structure according to an embodiment of the present invention;
FIG. 2 is a partial cross-sectional view of a first inspection box and a second inspection box according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating an assembly relationship between the pH test paper and the mounting plate according to an embodiment of the present invention.
Reference numerals: 1. a high voltage insulation device; 2. a detection box; 21. a first detection box; 22. a second detection box; 3. an absorption tank; 4. a viewing port; 5. a tail gas collecting box; 6. a camera; 7. a rotating shaft; 8. a turntable; 9. mounting a plate; 10. pH test paper; 11. a moisture barrier.
Detailed Description
The technical scheme of the invention is explained in detail in the following with the accompanying drawings.
SF in high-voltage insulation equipment6The gas detection method and system, referring to fig. 1, includes two detection boxes 2, the two detection boxes 2 are respectively a first detection box 21 and a second detection box 22, and the first detection box 21 and the second detection box 22 are respectively added with an equal amount of aqueous solution. First detection case 21 passes through pipeline (not mark in the figure) intercommunication in the sealing connection mouth department of high voltage insulation equipment 1, and pipeline and high voltage insulation equipment 1 integrated into one piece set up for be sealing connection setting between pipeline and the high voltage insulation equipment 1, take place SF when high voltage insulation equipment 1 and take place6When gas leaks, SF6Gas and SF6The decomposition products of the gas enter first detection chamber 212.
The high-voltage insulation equipment 1 can generate an arc reaction in the actual working process, and the main product of the decomposition of the SF6 gas under the action of the arc is SF4，S2F2，SF2，SOF2，SO2F2，SOF4And the like.
In particular, SF under the action of an electric arc6The relevant properties of the decomposition products of the gas are as follows:
1) SF4 (Sulfur tetrafluoride)
SF4 is a colorless gas with similar SO at room temperature2The pungent smell can be mixed with water to generate smoke in the air to generate SOF2And HF. SF4The gas can be alkaline solution or activated alumina (A1)2O3) And (4) absorbing. SF4The gas acts invasively on the lungs, affecting the respiratory system, and has a toxicity comparable to phosgene.
2)S2F2(Sulfur fluoride)
Is colorless gas at normal temperature, is toxic and pungent, and can be hydrolyzed completely to form S, SO when meeting water2And HF. S2F2Has phosgene-like destructive effect on respiratory systems.
3)SF2(Sulfur difluoride)
SF2 has unstable chemical property, is more active after being heated, and is easy to hydrolyze into S, SO2And HF. SF2 gas can be absorbed by lye or activated alumina.
4)SOF2(thionyl fluoride)
SOF2 is colorless gas, has odor egg flavor, and has stable chemical properties. It reacts slowly with water and can be quickly adsorbed by activated alumina or activated carbon. SOF2It is a highly toxic gas and can cause severe pulmonary edema, suffocating the animal to death.
5)SO2F2(sulfuryl difluoride)
SO2F2Is colorless and odorless gas, has extremely stable chemical properties, and can not react with water and metal when heated to 150 ℃. SO (SO)2F2Is not easy to be absorbed by the activated alumina. SO (SO)2F2Is a toxic gas that can cause spasticity.
6)SOF4(Tetrafluorosulfine)
SOF4Is colorless gas, has pungent odor, can be absorbed by alkaline solution, and reacts with water to generate SO2F2。SOF4Is harmful gas and has an invasive effect on lung.
Referring to fig. 2 and 3, the inner cavity of the detection box 2 is rotatably connected with a rotating shaft 7 along the horizontal direction, and two ends of the rotating shaft 7 are respectively rotatably supported on two opposite inner walls of the detection box 2. A disk-shaped turntable 8 is fixedly arranged on the rotating shaft 7, and the turntable 8 rotates by taking the rotating shaft 7 as a central shaft; meanwhile, six rectangular plate-shaped mounting plates 9 are welded on the outer ring surface of the turntable 8, and the six mounting plates 9 are circumferentially and uniformly distributed in an array manner. One side surface of the mounting plate 9 is attached with a pH test paper 10, and in this embodiment, the pH test paper 10 is a precision pH test paper 10 with precision of 0.1. In the process of rotating the rotary disk 8, the pH test paper 10 at the lowest position of the rotary disk 8 is soaked in the aqueous solution in the detection box 2 all the time, so that the pH test paper 10 is used for SF6The pH value of the gas and the components of the gas decomposed by the gas dissolved in water are detected.
In addition, the surface of the pH test paper 10 is wrapped by the moisture-proof layer 11, and the moisture-proof layer 11 plays a moisture-proof role, so that the condition that the pH test paper 10 on the rotary disc 8 is affected with moisture is reduced.
Referring to fig. 2 and 3, the second detection box 22 is provided at an upper surface thereof with an observation window through which a worker can observe the inside of the box. First detection case 21 and second detection case 22 all are transparent setting, and transparent detection case 2 has further made things convenient for the staff to observe the condition of incasement. In addition, all fixed mounting has camera 6 on the inner wall of one side of first detection case 21 and second detection case 22, and corresponding camera 6 is regularly shooed to the pH test paper 10 in first detection case 21 and the second detection case 22 respectively, and in addition, camera 6 electricity is connected with display terminal (not mark in the figure) for the picture that camera 6 was taken can in time be transmitted to display terminal through signal transmission.
The camera 6 can regularly shoot the pH test paper 10 in the first detection box 21 and the second detection box 22, and the staff analyzes the collected pictures so as to judge the SF in the high-voltage insulation equipment 16Gas and SF6Detecting whether gas generated by gas decomposition leaks or not and simultaneously detecting SF by using alkaline absorption liquid6Gases and their partial decomposition productsThe absorption effect of (2) is convenient for the treatment of residual gas in the later period.
Meanwhile, a motor (not shown) for driving the rotating shaft 7 to rotate is installed in the first detection box 21, a controller (not shown) is installed in the detection box 2 and electrically connected with the motor, and the controller can control the motor to start at fixed time, so that the rotating shaft 7 is driven to rotate, and the rotating disc 8 rotates.
Referring back to fig. 1 and 2, an air outlet is formed at one side of the first detection box 21 away from the high-voltage insulation device 1, the air outlet of the first detection box 21 is sequentially communicated with two absorption boxes 3 filled with alkaline absorption liquid, the last absorption box 3 is communicated with the second detection box 22, and leaked SF6The gas and its decomposition products are flowed from the first detecting tank 21 into the absorption tank 3, and the alkaline absorption liquid can react with SF6The gas and part of gas generated by decomposition are primarily absorbed, so that the purification treatment of the residual gas in the later period is facilitated.
In this embodiment, the alkaline absorption solution may preferably be a potassium hydroxide solution due to SF6The gas and the decomposition product of the SF6 gas have stable chemical properties, and a series of reaction conditions of high temperature, catalyst and the like are required for the reaction with other alkaline solutions such as sodium hydroxide, calcium hydroxide and the like; and potassium hydroxide solution to SF6Gas and SF6The absorption effect of partial products of gas decomposition is better, and the reaction condition is simpler. The specific detection steps are as follows:
the method comprises the following steps: gas leaks from the sealed connection port of the high-voltage insulating equipment 1 and flows into the first detection box 21, the turntable 8 in the first detection box 21 rotates regularly under the action of a motor and a controller, and the pH test paper 10 is contacted with an aqueous solution; meanwhile, the camera 6 shoots the pH test paper 10 in the first detection box 21 in real time, and the shot pH test paper 10 is compared with a standard colorimetric card in color so as to judge SF6Whether gas leaks or not;
step two: SF6After gas leakage, SF6The gas and the decomposition product thereof are dissolved in water and enter a solution containing potassium hydroxide for primary absorption treatment;
step three: SF6The gas and the gas whose decomposition product is not absorbed by the potassium hydroxide solution continue to flow to the second detection box 22, the pH test paper 10 in the second detection box 22 contacts with the aqueous solution, meanwhile, the camera 6 shoots the pH test paper 10 in the second detection box 22 in real time, when the color of the pH test paper 10 shot by the camera 6 changes, the pH test paper 10 is compared with a standard colorimetric card, and the effect of the potassium hydroxide solution on primary absorption of the SF6 gas and the decomposition product thereof is further judged.
Step four: SF not reacted with potassium hydroxide solution6The gas and the decomposition products thereof enter the tail gas collecting box 5, and then the later treatment is carried out, so that the gas is prevented from being directly discharged to the outside and causing harm to the external environment.
The above embodiments are merely illustrative and not restrictive, and those skilled in the art can make modifications to the embodiments without any inventive contribution as required after reading the present specification, but only protected by the patent laws within the scope of the claims.
Claims (5)
1. A SF6 gas detection method in high-voltage insulation equipment is characterized in that: the method comprises the following steps:
s1: adding aqueous solution into a first detection box (21), fixedly installing pH test paper (10) in the first detection box (21), wherein the pH test paper (10) is positioned on a rotary disc (8), the rotary disc (8) rotates at regular time under the action of a motor and a controller, and the pH test paper (10) at the lowest position of the rotary disc (8) is soaked in the aqueous solution in the detection box (2) all the time;
s2: the first detection box (21) is communicated to a sealed connection port of the high-voltage insulation equipment (1) through a pipeline, and the pipeline is in sealed connection with the high-voltage insulation equipment (1);
s3: a camera (6) is arranged in the first detection box (21), the camera (6) is used for taking pictures of the pH test paper (10) in the first detection box (21) at regular time, and the pictures are transmitted to a display terminal;
s4: and comparing the color of the pH test paper (10) in the picture with that of a standard colorimetric card, and judging whether SF6 gas leaks from the high-voltage insulating equipment (1).
2. An SF6 gas detection system in high voltage insulation equipment, characterized in that: the device comprises a first detection box (21) communicated with a sealed connection port of high-voltage insulation equipment (1), wherein a gas outlet of the first detection box (21) is sequentially communicated with a plurality of absorption boxes (3) filled with alkaline absorption liquid, a gas outlet of the last absorption box (3) through which gas flows is communicated with a second detection box (22), and the second detection box (22) is provided with an observation port (4); first detection case (21) and second detection case (22) add respectively and have equivalent aqueous solution, two detection case (2) inner chambers rotate along the horizontal direction and are connected with pivot (7), fixed mounting is gone up in pivot (7) and is discoid carousel (8), carousel (8) use pivot (7) to take place to rotate as the center pin, the outer lane surface welding of carousel (8) has six rectangular plate-like mounting panel (9), and six mounting panel (9) are the even array distribution of circumference, one side surface laminating of mounting panel (9) has pH test paper (10), in pH test paper (10) of carousel (8) extreme lower position department soak the aqueous solution in detection case (2) all the time, alkaline absorption liquid is the potassium hydroxide solution, correspond respectively with equivalent potassium hydroxide solution and add a plurality of in the absorption case (3).
3. SF6 gas detection system in high voltage insulation equipment, according to claim 2, characterized by: the first detection box (21) and the second detection box (22) are both arranged in a transparent mode.
4. SF6 gas detection system in high voltage insulation equipment, according to claim 3, characterized by: the second detection box (22) is internally provided with a camera (6) used for shooting the pH test paper (10) in the second detection box (22) at regular time.
5. SF6 gas detection system in high voltage insulation equipment, according to claim 4, characterized by: and the air outlet of the second detection box (22) is communicated with a tail gas collecting box (5).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112834686A (en) * | 2019-11-22 | 2021-05-25 | 北方工业大学 | Multifunctional gas component circulation change and circulation detection device |
| CN112834693A (en) * | 2019-11-22 | 2021-05-25 | 北方工业大学 | Multifunctional gas component dynamic change and dynamic detection device |
| CN110927340A (en) * | 2019-12-06 | 2020-03-27 | 西安锐驰电器有限公司 | Method for detecting concentration of gas decomposition product in high-voltage power equipment |
| CN110926716B (en) * | 2019-12-28 | 2021-03-19 | 南通科源电力设备有限公司 | SF6 gas high-voltage electrical apparatus safety monitoring device |
| CN112131993A (en) * | 2020-09-16 | 2020-12-25 | 因士(上海)科技有限公司 | Gas leakage visual detection system and method based on image recognition technology |
| CN113097916B (en) * | 2021-04-30 | 2022-11-15 | 炬光电力集团有限公司 | Environment-friendly gas insulation ring main unit |
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| JPH01243505A (en) * | 1988-03-25 | 1989-09-28 | Mitsubishi Electric Corp | Gas checker for gas insulated electromagnetic induction apparatus |
| JPH03108629A (en) * | 1989-09-22 | 1991-05-08 | Nec Corp | Detection of gas pipeline leakage |
| CN201251500Y (en) * | 2008-08-04 | 2009-06-03 | 中芯国际集成电路制造(上海)有限公司 | Leakage detector for pneumatic valve |
| CN101871833A (en) * | 2009-04-23 | 2010-10-27 | Abb研究有限公司 | Sf6 gas leakage detection method and material |
| 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 |
| CN201772977U (en) * | 2010-09-06 | 2011-03-23 | 贵州金赤化工有限责任公司 | Detection device for monitoring leakage detecting tube of urea high-pressure equipment |
| CN102179150A (en) * | 2011-03-30 | 2011-09-14 | 河北省电力研究院 | Tail gas purification device for detecting sulfur hexafluoride decomposition products and method thereof |
| CN202216808U (en) * | 2011-09-09 | 2012-05-09 | 浙江贝盛光伏股份有限公司 | Leakage detecting box |
| CN105202361A (en) * | 2015-09-16 | 2015-12-30 | 四川菲博斯科技有限责任公司 | Intelligent SF 6 air inflation unit of electrical equipment |
| KR101848020B1 (en) * | 2016-05-11 | 2018-05-28 | 주식회사 쏠락 | Protective cover for preventing looseness of pipe fitting and detecting leakage |
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