CN103592085B - Negative corona sulfur hexafluoride gas leak detector - Google Patents
Negative corona sulfur hexafluoride gas leak detector Download PDFInfo
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- CN103592085B CN103592085B CN201310580948.4A CN201310580948A CN103592085B CN 103592085 B CN103592085 B CN 103592085B CN 201310580948 A CN201310580948 A CN 201310580948A CN 103592085 B CN103592085 B CN 103592085B
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- frequency pulse
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- 229910018503 SF6 Inorganic materials 0.000 title claims abstract description 23
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 229960000909 sulfur hexafluoride Drugs 0.000 title claims abstract description 23
- 238000001514 detection method Methods 0.000 claims abstract description 36
- 230000005611 electricity Effects 0.000 claims description 7
- 239000011810 insulating material Substances 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 20
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 2
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005108 dry cleaning Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
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- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
The invention discloses a kind of negative corona sulfur hexafluoride gas leak detector, producing circuit, discharge loop, current detection circuit, central processing unit and Display and Alarm Circuit including dc source, high-frequency pulse voltage, the input that the output of described dc source produces circuit, central processing unit and Display and Alarm Circuit with high-frequency pulse voltage respectively is connected；High-frequency pulse voltage produces the output of circuit and connects discharge loop, and described current detection circuit is connected in series in discharge loop, and the input of central processing unit connects the output of current detection circuit, and the output of central processing unit connects Display and Alarm Circuit.Present configuration is simple, it is not necessary to AC power, and all circuit are directly welded on one piece of circuit board, therefore volume can do less, there is advantage lightweight, easy to carry, simple to operate, that measuring speed is fast, highly sensitive, stability is strong.
Description
Technical field
The present invention relates to gas-detecting device, a kind of device for detecting sulfur hexafluoride gas.
Background technology
Along with the installation of sulfur hexafluoride electrical equipment and increasing of the quantity that puts into operation in power system, the number of times also showed increased of sulfur hexafluoride equipment generation gas leakage, the detection of sulfur hexafluoride gas leakage also becomes equipment investment and runs or the important step of line service.The leakage of sulfur hexafluoride gas not only can the pollution of engine context, and the dielectric level of entail dangers to equipment.The method being currently used for detecting sulfur hexafluoride Leak artifact mainly has electronics prize law and ultraviolet ionization detection method two kinds, and wherein electronics prize law needs the ion emitter using radio isotope as detector, and structure is complicated, and volume is bigger；The gas that ultraviolet ionization detection rule needs installation vavuum pump will leak out sucks in the sensor of tester, and volume and power consumption are relatively big, and can not use dc source, uses more inconvenience.
Summary of the invention
The technical issues that need to address of the present invention are to provide a kind of simple in construction, easy to use and can accurately detect the detector of sulfur hexafluoride gas leakage rate.
For solving above-mentioned technical problem, the technical solution adopted in the present invention is as follows.
Negative corona sulfur hexafluoride gas leak detector, circuit, discharge loop, current detection circuit, central processing unit and Display and Alarm Circuit is produced including dc source, high-frequency pulse voltage, the input that the output of described dc source produces circuit, central processing unit and Display and Alarm Circuit with high-frequency pulse voltage respectively is connected, and is used for providing 3V direct current；High-frequency pulse voltage produces the output of circuit and connects discharge loop, for providing high frequency pulse dc electricity for discharge loop；Described current detection circuit is connected in series in discharge loop, for detecting the current value of discharge loop；The input of central processing unit connects the output of current detection circuit, the output of central processing unit connects Display and Alarm Circuit, central processing unit for judging the leakage rate of sulfur hexafluoride gas according to the current value of current detection circuit detection, and carries out showing and sending alarm signal by Display and Alarm Circuit.
The concrete structure of described discharge loop is: discharge loop includes that being connected to high-frequency pulse voltage produces passive electrode and the sparking electrode of circuit both positive and negative polarity output, and described current detection circuit is connected in series between cathode output end and the sparking electrode that high-frequency pulse voltage produces circuit.
Described high-frequency pulse voltage produces the concrete structure of circuit: high-frequency pulse voltage produces self-maintained circuit, transformer and the rectification circuit that circuit includes being sequentially connected in series；The input of self-maintained circuit connects 3V dc source, for dc source is converted to high-frequency alternating voltage；The input of transformer connects the output of self-maintained circuit, for high-frequency alternating low pressure is increased to 500V high-frequency alternating high pressure；The output of the input connection transformer of rectification circuit, for 500V high-frequency alternating voltage being converted to 500V high frequency pulse dc electricity, the cathode output end of rectification circuit connects passive electrode, and the cathode output end of rectification circuit connects sparking electrode through current detection circuit.
The present invention is improved by: the main body of described passive electrode and sparking electrode is co-located in circular cylindrical shell body, it is external that the head of passive electrode and sparking electrode stretches out circular cylindrical shell, uses insulating materials to fill isolation between passive electrode and the sparking electrode in housing.
Further improvement of the present invention is: be additionally provided with amplifying circuit between described central processing unit and Display and Alarm Circuit.
The improvement of the present invention also resides in: described Display and Alarm Circuit includes buzzer, indicator lamp and display.
Owing to have employed technique scheme, the technological progress that the present invention obtains is as follows.
Present configuration is simple, it is not necessary to AC power, and all circuit are directly welded on one piece of circuit board, therefore volume can do less, there is advantage lightweight, easy to carry, simple to operate, that measuring speed is fast, highly sensitive, stability is strong.High-frequency pulse voltage in the present invention produces circuit and is supplied to discharge loop for low-voltage DC is converted to high frequency pulse dc electricity, substantially increases accuracy of detection and the detection efficiency of discharge loop.The present invention is during detection, if No leakage, buzzer can send the tweeting sound that interval is stable；When finding gas leakage, tweeting sound becomes rapid, and leakage rate is the biggest more rapid.The present invention can not only be applied to transformer station's high-voltage switch gear and the leak detection of GIS air chamber sulfur hexafluoride gas, can also be used for air-conditioning refrigeration system cold-producing medium leak detection, the ethylene oxide of hospital disinfection equipment leaks (gas that detection carries halogen) detection, it is also possible to the halogen gas be applicable to most detections of the gases containing chlorine, fluorine and bromine and the cleaning agent (such as: carbon tetrachloride) of dry-cleaning equipment, fire extinguishing system detects.
Accompanying drawing explanation
Fig. 1 is the circuit structure block diagram of the present invention.
Detailed description of the invention
With specific embodiment, the present invention is described in further details below in conjunction with the accompanying drawings:
Negative corona sulfur hexafluoride gas leak detector, including casing, is provided with circuit board, is additionally provided with the test bar being connected with circuit board outside casing in casing.The circuit structure block diagram of the present invention is as shown in Figure 1, circuit, discharge loop, current detection circuit, central processing unit, amplifying circuit and Display and Alarm Circuit is produced including dc source, high-frequency pulse voltage, wherein dc source, high-frequency pulse voltage produce circuit, current detection circuit, central processing unit, amplifying circuit and Display and Alarm Circuit and weld on circuit boards, discharge loop is arranged in test bar, and the discharge loop in test bar is connected with the binding post on circuit board by wire.
The input that the output of described dc source produces circuit, central processing unit, amplifying circuit and Display and Alarm Circuit with high-frequency pulse voltage respectively is connected, and provides 3V direct-current working volts for producing circuit, central processing unit, amplifying circuit and Display and Alarm Circuit for high-frequency pulse voltage.
High-frequency pulse voltage produces the output of circuit and connects discharge loop, for providing high frequency pulse dc electricity for discharge loop.High-frequency pulse voltage produces self-maintained circuit, transformer and the rectification circuit that circuit includes being sequentially connected in series.Wherein: the input of self-maintained circuit connects 3V dc source, for dc source is converted to high-frequency alternating voltage；The input of transformer connects the output of self-maintained circuit, for high-frequency alternating low pressure is increased to 500V high-frequency alternating high pressure；The output of the input connection transformer of rectification circuit, for 500V high-frequency alternating voltage being converted to 500V high frequency pulse dc electricity, the cathode output end of rectification circuit connects passive electrode, and the cathode output end of rectification circuit connects sparking electrode through current detection circuit.
Discharge loop includes that being connected to high-frequency pulse voltage produces passive electrode and the sparking electrode of circuit both positive and negative polarity output, for carrying out negative corona discharge by equipment to be detected, forms discharge loop, to have detected whether that sulfur hexafluoride gas leaks.In in the present embodiment, the main body of passive electrode and sparking electrode is co-located on cylindrical test bar, the head of passive electrode and sparking electrode stretches out outside test bar, uses insulating materials to fill isolation between passive electrode and the sparking electrode in test bar.
Current detection circuit is connected in series between cathode output end and the sparking electrode that high-frequency pulse voltage produces circuit, and current detection circuit is for detecting the current value of discharge loop.The input of central processing unit connects the output of current detection circuit, the output of central processing unit connects Display and Alarm Circuit, central processing unit for judging the leakage rate of sulfur hexafluoride gas according to the current value of current detection circuit detection, then sending control signal, the amplified circuit of control signal is transferred to Display and Alarm Circuit after amplifying to carry out showing and sending alarm signal.In the present invention, central processing unit can be monitored with the speed of 4000 times per second, even if atomic little signal can also capture, the most all can stablize, reliably work.
Display and Alarm Circuit includes buzzer, indicator lamp and display.
The present invention is during carrying out Leakage inspection to sulfur hexafluoride equipment, by electric arc connected loop between sparking electrode and passive electrode, when leaking without sulfur hexafluoride gas, and current stabilization in discharge loop.When there being sulfur hexafluoride gas to leak between sparking electrode and passive electrode, arc extinguishing effect due to sulfur hexafluoride, electric arc can increase along with the concentration of sulfur hexafluoride gas and be gradually reduced, the process that electric current reduces can carry out numerical value by display and show, naturally it is also possible to shown by the luminosity of indicator lamp；When electric current reduces to boundary value, central processing unit controls buzzer and sends warning.
Claims (1)
1. negative corona sulfur hexafluoride gas leak detector, it is characterized in that: include that dc source, high-frequency pulse voltage produce circuit, discharge loop, current detection circuit, central processing unit and Display and Alarm Circuit, the input that the output of described dc source produces circuit, central processing unit and Display and Alarm Circuit with high-frequency pulse voltage respectively is connected, and is used for providing 3V direct current；High-frequency pulse voltage produces the output of circuit and connects discharge loop, for providing high frequency pulse dc electricity for discharge loop；Described current detection circuit is connected in series in discharge loop, for detecting the current value of discharge loop；The input of central processing unit connects the output of current detection circuit, the output of central processing unit connects Display and Alarm Circuit, central processing unit for judging the leakage rate of sulfur hexafluoride gas according to the current value of current detection circuit detection, central processing unit is monitored with the speed of 4000 times per second, and carries out showing and sending alarm signal by Display and Alarm Circuit；Described discharge loop includes that being connected to high-frequency pulse voltage produces passive electrode and the sparking electrode of circuit both positive and negative polarity output, and described current detection circuit is connected in series between cathode output end and the sparking electrode that high-frequency pulse voltage produces circuit；Described high-frequency pulse voltage produces self-maintained circuit, transformer and the rectification circuit that circuit includes being sequentially connected in series；The input of self-maintained circuit connects 3V dc source, for dc source is converted to high-frequency alternating voltage；The input of transformer connects the output of self-maintained circuit, for high-frequency alternating low pressure is increased to 500V high-frequency alternating high pressure；The output of the input connection transformer of rectification circuit, for 500V high-frequency alternating voltage being converted to 500V high frequency pulse dc electricity, the cathode output end of rectification circuit connects passive electrode, and the cathode output end of rectification circuit connects sparking electrode through current detection circuit；The main body of described passive electrode and sparking electrode is co-located in circular cylindrical shell body, and it is external that the head of passive electrode and sparking electrode stretches out circular cylindrical shell, uses insulating materials to fill isolation between passive electrode and the sparking electrode in housing；It is additionally provided with amplifying circuit between described central processing unit and Display and Alarm Circuit；Described Display and Alarm Circuit includes buzzer, indicator lamp and display.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310580948.4A CN103592085B (en) | 2013-11-19 | 2013-11-19 | Negative corona sulfur hexafluoride gas leak detector |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310580948.4A CN103592085B (en) | 2013-11-19 | 2013-11-19 | Negative corona sulfur hexafluoride gas leak detector |
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| CN103592085A CN103592085A (en) | 2014-02-19 |
| CN103592085B true CN103592085B (en) | 2016-08-17 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108120904A (en) * | 2016-11-30 | 2018-06-05 | 全球能源互联网研究院 | A kind of SF6 gas sensors and preparation method thereof |
| CN108750407B (en) * | 2018-06-15 | 2020-06-19 | 芜湖英特杰智能科技有限公司 | Utilize cold-storage insulation can temperature control equipment of vortex technique |
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|---|---|---|---|---|
| US5347223A (en) * | 1993-01-22 | 1994-09-13 | J And N Associates, Inc. | Gas leak detector sensing tip with interior concentric bores and corona current generation |
| CN2898824Y (en) * | 2006-06-08 | 2007-05-09 | 汪献忠 | Quantitative SF gas leakage detector |
| CN101196492A (en) * | 2007-12-17 | 2008-06-11 | 福建师范大学 | Method for detecting leakage of constant voltage discharging type sulfur hexafluoride |
| CN201188050Y (en) * | 2008-01-04 | 2009-01-28 | 福建师范大学 | On-line monitoring device for SF6 gas leakage base on multi-sensor |
| CN101358947A (en) * | 2008-09-22 | 2009-02-04 | 河南省日立信电子有限公司 | Intelligent SF6 gas sensor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2651750Y (en) * | 2003-11-04 | 2004-10-27 | 常州市武进五菱柴油机有限公司 | Low-concentration SF gas realtime checker |
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- 2013-11-19 CN CN201310580948.4A patent/CN103592085B/en active Active
Patent Citations (5)
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|---|---|---|---|---|
| US5347223A (en) * | 1993-01-22 | 1994-09-13 | J And N Associates, Inc. | Gas leak detector sensing tip with interior concentric bores and corona current generation |
| CN2898824Y (en) * | 2006-06-08 | 2007-05-09 | 汪献忠 | Quantitative SF gas leakage detector |
| CN101196492A (en) * | 2007-12-17 | 2008-06-11 | 福建师范大学 | Method for detecting leakage of constant voltage discharging type sulfur hexafluoride |
| CN201188050Y (en) * | 2008-01-04 | 2009-01-28 | 福建师范大学 | On-line monitoring device for SF6 gas leakage base on multi-sensor |
| CN101358947A (en) * | 2008-09-22 | 2009-02-04 | 河南省日立信电子有限公司 | Intelligent SF6 gas sensor |
Non-Patent Citations (2)
| Title |
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| 高压变电站室内分布式SF_6监测系统的研制;蔡声镇 等;《仪器仪表学报 》;20060930;第27卷(第9期);全文 * |
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| CN103592085A (en) | 2014-02-19 |
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