CN201724899U - Sulfur hexafluoride gas humidity detector - Google Patents
Sulfur hexafluoride gas humidity detector Download PDFInfo
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- CN201724899U CN201724899U CN2010202801406U CN201020280140U CN201724899U CN 201724899 U CN201724899 U CN 201724899U CN 2010202801406 U CN2010202801406 U CN 2010202801406U CN 201020280140 U CN201020280140 U CN 201020280140U CN 201724899 U CN201724899 U CN 201724899U
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Abstract
The utility model relates to a sulfur hexafluoride gas humidity detector. The detector comprises a gas inlet, a gas flow rate regulation valve, a gas inlet valve, a photoacoustic cell and a gas outlet valve which are sequentially connected through pipelines, wherein the gas inlet is connected with a sampling opening of detected equipment through the pipeline, the gas inlet valve and the gas outlet valve are respectively connected with a gas input opening and a gas output opening of the photoacoustic cell, the detector also comprises an integrated control module, a display and a power supply module, the integrated control module is used for receiving detection signals transmitted by the photoacoustic cell and carrying out analysis and processing to output detection results, the display is used for displaying the detection results, and the power supply module is used for supplying electricity to each part in the detector. The detector utilizes the photoacoustic spectroscopy technology, has the advantages of simple structure, high detection precision, high detection speed, low maintenance quantity, little required sample gas and minimum damage to the tested equipment, and is particularly applicable to the in-site humidity detection of sulfur hexafluoride electric equipment such as sulfur hexafluoride circuit breakers and full-sealed combined electric appliances.
Description
Technical field
The utility model relates to the high voltage electric equipment safety detection technology, more particularly, relates to a kind of pick-up unit that is used for detecting high voltage electric equipment sulfur hexafluoride gas humidity.
Background technology
Along with science and technology development, sulfur hexafluoride (SF
6) gas causes people's interest day by day and be absorbed in.Sulfur hexafluoride gas has incombustible characteristic because of it, and has excellent insulating property and arc extinction performance, more and more is used in the High-Voltage Insulation electrical equipment.For example, the application of sulfur hexafluoride breaker and sulfur hexafluoride fully closed combined electric unit (GIS) is quite general.
Yet the moisture in the sulfur hexafluoride gas is very large to the harm of electrical equipment, mainly shows as following 4 points: 1, the sulfur hexafluoride hydrolysis reaction generates hydrofluorite and sulphurous acid, and these gases have corrosivity, but the heavy corrosion electrical equipment; 2, the moisture in the sulfur hexafluoride gas can aggravate the hydrolysis of subfluoride; 3, make the metal fluoride hydrolysis, when sulfur hexafluoride is resolved into atomic state S, F by electric arc, contact evaporates a large amount of metallic coppers and tungsten steam, this steam and sulfur hexafluoride at high temperature can react, and generate metal fluoride and subfluoride, for example fluoridize thionyl, hydrogen fluoride etc., it is hypertoxic fluoridizing thionyl, human body is had very big harm, and hydrogen fluoride also is poisonous gas, the serious burn human body but it not only has corrosivity; 4, since the moisture in the sulfur hexafluoride gas exist with the form of water vapor, when temperature reduces, may be in the device interior dewfall, attached to piece surface,, be easy to generate creeping discharge (flashover) and cause accident as electrode, insulator surface etc.
Therefore, the scene of sulfur hexafluoride electrical equipment gas humidity detected being very important, also is the important monitoring means that guarantees the electrical network reliability service.The sulfur hexafluoride gas humidity detection method commonly used of electric system at present mainly contains electrolytic process, capacitance-resistance method, dew point method.But these methods not necessarily are applicable to outdoor and the transformer station scene, and the accuracy of data also is difficult to comparison.At present, transformer station's on-the-spot test sulfur hexafluoride gas humidity generally adopts precision easy to carry, simple to operate " dew point hygrometer ", but in practical operation, tends to the influence because of external interference or other various factors, make test data inaccurate, thereby cause the erroneous judgement of test result disconnected.For example, when measuring the low humidity sulfur hexafluoride gas, the dew point displayed value is difficult to stable, and bigger refrigeration work consumption and the long cooling time of appliance requires, especially moisture is seldom the time, on the Cold Mirrors face of instrument, need collect enough moisture and could set up the stable cut-layer of gas-liquid equilibrium, this process need long time and a lot of tested gas.And dew point hygrometer is subjected to the influence of environment temperature bigger, and when environment temperature was higher, instrument was prone to phenomenons such as reading is unusual.All kinds of impurity that exist with the steam form also can exert an influence to measurement result.
Conclusion is got up, and adopt present existing method to mainly contain following some deficiency: be subjected to external interference many, the minute surface pollution problems is arranged, Measuring Time is long, and it is too much to consume tested gas.
The utility model content
The technical problems to be solved in the utility model is, at the above-mentioned defective of prior art, provides a kind of sulfur hexafluoride gas humidity detector that utilizes optoacoustic spectroscopy.
The technical scheme that its technical matters that solves the utility model adopts is: propose a kind of sulfur hexafluoride gas humidity detector, comprise the air intake opening that connects successively by pipeline, gas flow regulating valve, air intake valve, the photoacoustic cell and the valve of giving vent to anger, described air intake opening is connected with the thief hatch of equipment under test by pipeline, the described air intake valve and the valve of giving vent to anger are connected to the gas input port and the gas delivery port of photoacoustic cell, and described pick-up unit also comprises the detection signal that receives described photoacoustic cell transmission and analyzes and handle to export the integrated control module of testing result, be used to show the display of testing result, and be the power module of each several part power supply in the described pick-up unit.
In the sulfur hexafluoride gas humidity detector according to an embodiment of the utility model, described pipeline is polyfluortetraethylene pipe, stainless-steel tube or copper pipe.In the example, the caliber of described pipeline is 3mm.
In the sulfur hexafluoride gas humidity detector according to an embodiment of the utility model, the switching of described air intake valve and the described valve of giving vent to anger is controlled by described integrated control module.
In the sulfur hexafluoride gas humidity detector according to an embodiment of the utility model, described pick-up unit also comprises gas drier and the gas concentration unit that is connected with the described valve of giving vent to anger by pipeline.
In the sulfur hexafluoride gas humidity detector according to an embodiment of the utility model, described photoacoustic cell is that volume is the square photoacoustic cell of 5ml.
In the sulfur hexafluoride gas humidity detector according to an embodiment of the utility model, described power module adopts external power supply or accumulator or the combination of the two.In the example, described power module is the 12v supplying cell.
Sulfur hexafluoride gas humidity detector of the present utility model detects sulfur hexafluoride gas humidity based on optoacoustic spectroscopy, thereby has the following advantages:
(1) owing to adopts optoacoustic spectroscopy, directly measure the ultrasound wave that absorption produced of tested gas to light, and can also measure and absorb photon energy phase shifts very little or that do not absorb photon energy gas and detect moisture in the tested gas, it is highly sensitive, stable, dependable performance.
(2) volume of photoacoustic cell is little, does not need the lasting of tested gas to flow, and confining gas is measured, so its detection time is short, and is easy to manufacture, cheap, can reduce to the degree of minimum to the demand of the sulfur hexafluoride in the equipment under test.
(3) compare with technology such as electrolytic process, capacitance-resistance method, dew point methods, photocaustic spectroscopy can effectively be avoided big, deficiencies such as instrument is difficult to stablize, Measuring Time length influenced by ambient temperature, and, because of purging and the equilibration time that has reduced tested gas, make and reduced the infringement of test process to greatest extent in the test process equipment.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the structured flowchart according to the sulfur hexafluoride gas humidity detector of an embodiment of the utility model.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
The sulfur hexafluoride gas humidity detector that the utility model proposes has utilized optoacoustic spectroscopy.The principle of optoacoustic spectroscopy is: behind the luminous energy of material absorbing periodic modulation, change heat energy into, periodically hot-fluid expands with heat and contract with cold surrounding medium and produces acoustical signal, is photoacoustic signal.Because the acoustic energy that produces in the optoacoustic effect directly is proportional to the luminous energy of material absorbing, and absorption peak appears in the material of heterogeneity at different optical wavelengths place, therefore when the light source with multiline (or continuous spectrum) shines sample in succession with light beams of different wavelengths, the material of heterogeneity will produce photoacoustic signal maximum value with the corresponding optical wavelength of absorption peak separately place in the sample, obtain photoacoustic signal thus and be called photoacoustic spectrum with the curve that optical wavelength changes.Photoacoustic spectrum is the optical absorption spectra of representative species in fact, therefore utilizes optoacoustic effect to carry out qualitative and quantitative analysis to the structure and the component of measured matter.
Fig. 1 is the structured flowchart according to the sulfur hexafluoride gas humidity detector of an embodiment of the utility model.As shown in Figure 1, this sulfur hexafluoride gas humidity detector 100 comprises air intake opening 12, gas flow regulating valve 14, air intake valve 16, photoacoustic cell 20, the valve 32 of giving vent to anger, gas flow dryer 34 and the gas concentration unit 36 that connects by pipeline successively.Air intake opening 12 is used for that the sample tap by for example tested GIS of pipeline and tested electrical equipment or isolating switch is connected when detecting, to introduce sulfur hexafluoride gas to be detected.The pipeline that is adopted in the utility model can be inner wall smooth, be difficult for the polyfluortetraethylene pipe of the moisture absorption, perhaps also can be stainless-steel tube or copper pipe, and caliber is 3mm.Air intake opening 12 and then be connected with gas flow regulating valve 14 by pipeline.Gas flow regulating valve 14 can be a manual modulation valve, also can be automatic regulating valve, and it further is connected with air intake valve 16 by pipeline.The air intake valve 16 and the valve 32 of giving vent to anger are connected to the gas input port and the gas delivery port of photoacoustic cell 20, the former is photoacoustic cell 20 inputs sulfur hexafluoride gas to be detected, sulfur hexafluoride gas after the latter will detect is derived, and by after gas flow dryer 34 dryings, reclaim by gas concentration unit 36, carry out respective handling for example dry, purify, the compression back is stand-by as deposit gas.
The course of work of sulfur hexafluoride gas humidity detector 100 shown in Figure 1 is as follows: with pipeline and tested electrical equipment for example the sample tap of GIS or isolating switch be connected, open the sample tap valve, the about 8-15 of exhaust flushing line second, then the other end of this pipeline is connected to the air intake opening 12 of this pick-up unit.Cao Zuo purpose is in order to reduce as much as possible because of the influence of the moisture in the pipeline to test result like this.After pipeline being connected to the air intake opening 12 of pick-up unit 100, adjustments of gas flow control valve 14.Connect pipeline and power supply, the integrated control module 40 control air intake valves 16 and the valve 32 of giving vent to anger are opened simultaneously, allow the about 15-20 of gas purging to be measured second, close the valve 32 of giving vent to anger then, close air intake valve 16 again.Pick-up unit 100 will be measured the air pressure of air chamber in the photoacoustic cell 20, judge whether in normal measurement range, otherwise open air intake valve 16 or the valve 32 of giving vent to anger, and tonifying Qi or discharge gas make air pressure in normal range once more.Then, by photoacoustic cell 20 gas to be measured in it is detected.After about 10-20 measurement of second, photoacoustic cell 20 is transferred to integrated control module 40 with detected signal, calculating and analysis through integrated control module 40, to detect data at last by display 50 outputs, test results such as for example exportable dew point value, PPM value, test pressure, probe temperature, test duration.
The sulfur hexafluoride gas humidity detector that the utility model proposes can be used for for example on-the-spot Humidity Detection of sulfur hexafluoride breaker and fully closed combined electric unit of sulfur hexafluoride electrical equipment, it is simple in structure, easy and simple to handle, reliable, the accuracy of detection height, detection speed is fast, maintenance is little, needs sample gas few, and is minimum to the testing apparatus damage, use manpower and material resources sparingly, can greatly improve the operational efficiency of power equipment.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.
Claims (8)
1. sulfur hexafluoride gas humidity detector, it is characterized in that, comprise the air intake opening that connects successively by pipeline, gas flow regulating valve, air intake valve, the photoacoustic cell and the valve of giving vent to anger, described air intake opening is connected with the thief hatch of equipment under test by pipeline, the described air intake valve and the valve of giving vent to anger are connected to the gas input port and the gas delivery port of photoacoustic cell, and described pick-up unit also comprises the detection signal that receives described photoacoustic cell transmission and analyzes and handle to export the integrated control module of testing result, be used to show the display of testing result, and be the power module of each several part power supply in the described pick-up unit.
2. sulfur hexafluoride gas humidity detector according to claim 1 is characterized in that, described pipeline is polyfluortetraethylene pipe, stainless-steel tube or copper pipe.
3. sulfur hexafluoride gas humidity detector according to claim 2 is characterized in that, the caliber of described pipeline is 3mm.
4. sulfur hexafluoride gas humidity detector according to claim 1 is characterized in that, the switching of described air intake valve and the described valve of giving vent to anger is controlled by described integrated control module.
5. sulfur hexafluoride gas humidity detector according to claim 1 is characterized in that, described pick-up unit also comprises gas drier and the gas concentration unit that is connected with the described valve of giving vent to anger by pipeline.
6. sulfur hexafluoride gas humidity detector according to claim 1 is characterized in that, described photoacoustic cell is that volume is the square photoacoustic cell of 5ml.
7. sulfur hexafluoride gas humidity detector according to claim 1 is characterized in that, described power module adopts external power supply or accumulator or the combination of the two.
8. sulfur hexafluoride gas humidity detector according to claim 7 is characterized in that, described power module is the 12v supplying cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202801406U CN201724899U (en) | 2010-08-03 | 2010-08-03 | Sulfur hexafluoride gas humidity detector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202801406U CN201724899U (en) | 2010-08-03 | 2010-08-03 | Sulfur hexafluoride gas humidity detector |
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| CN201724899U true CN201724899U (en) | 2011-01-26 |
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| CN2010202801406U Expired - Fee Related CN201724899U (en) | 2010-08-03 | 2010-08-03 | Sulfur hexafluoride gas humidity detector |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519904A (en) * | 2011-12-13 | 2012-06-27 | 重庆大学 | Automatic constant temperature type photoacoustic detection device for SF6 decomposed components and experiment method thereof |
| CN103823425A (en) * | 2013-10-30 | 2014-05-28 | 国家电网公司 | Intelligent environment monitoring device for intelligent switching station integration supervision and control system |
| CN106706163A (en) * | 2016-12-15 | 2017-05-24 | 深圳供电局有限公司 | Temperature measuring device for measuring temperature of insulating gas in sulfur hexafluoride electrical equipment |
-
2010
- 2010-08-03 CN CN2010202801406U patent/CN201724899U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519904A (en) * | 2011-12-13 | 2012-06-27 | 重庆大学 | Automatic constant temperature type photoacoustic detection device for SF6 decomposed components and experiment method thereof |
| CN103823425A (en) * | 2013-10-30 | 2014-05-28 | 国家电网公司 | Intelligent environment monitoring device for intelligent switching station integration supervision and control system |
| CN106706163A (en) * | 2016-12-15 | 2017-05-24 | 深圳供电局有限公司 | Temperature measuring device for measuring temperature of insulating gas in sulfur hexafluoride electrical equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110126 Termination date: 20130803 |