CN109253900A - A kind of sulfur hexafluoride sampling method - Google Patents

A kind of sulfur hexafluoride sampling method Download PDF

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Publication number
CN109253900A
CN109253900A CN201811285795.XA CN201811285795A CN109253900A CN 109253900 A CN109253900 A CN 109253900A CN 201811285795 A CN201811285795 A CN 201811285795A CN 109253900 A CN109253900 A CN 109253900A
Authority
CN
China
Prior art keywords
sampling
vacuum pump
pressure
detection
sulfur hexafluoride
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201811285795.XA
Other languages
Chinese (zh)
Inventor
姚强
何国军
肖剑锋
苗玉龙
邱妮
侯雨杉
张施令
刘航
胡晓锐
宫林
籍勇亮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Electric Power Research Institute of State Grid Chongqing Electric Power Co Ltd
State Grid Corp of China SGCC
Original Assignee
Electric Power Research Institute of State Grid Chongqing Electric Power Co Ltd
State Grid Corp of China SGCC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Electric Power Research Institute of State Grid Chongqing Electric Power Co Ltd, State Grid Corp of China SGCC filed Critical Electric Power Research Institute of State Grid Chongqing Electric Power Co Ltd
Priority to CN201811285795.XA priority Critical patent/CN109253900A/en
Publication of CN109253900A publication Critical patent/CN109253900A/en
Pending legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00Sampling; Preparing specimens for investigation
    • G01N1/02Devices for withdrawing samples
    • G01N1/22Devices for withdrawing samples in the gaseous state
    • G01N1/24Suction devices

Abstract

The invention discloses a kind of sulfur hexafluoride sampling methods, it includes: S1: starting vacuum pump judges whether the pressure in vacuum pump reaches preset value;If not up to, illustrating vacuum pump, there are gas leakage, exit sampling;Conversely, then entering step S2;S2: it by vacuum pump static 3 minutes, checks whether vacuum degree declines, if not declining, illustrates that vacuum originally has gas leakage, exit sampling;Conversely, entering step S3;S3: opening solenoid valve and start qi of chong channel ascending adversely, and all valves are closed when reaching sampling pressure and complete sampling.The case where due to not vacuumizing to pipeline when the present invention solves field sampling manual sampling, inevitably bringing air and moisture content into, while steel cylinder leakage once occur, then can not acquire sample;The intensity of manual labor is alleviated using intelligent automatic operation simultaneously.It improves work efficiency.

Description

A kind of sulfur hexafluoride sampling method
Technical field
The present invention relates to sulfur hexafluoride technical field, especially a kind of sulfur hexafluoride sampling method.
Background technique
With the development of power industry, the quantity of SF6 electrical equipment installation and operation is increasing, the supervision to SF6 gas It becomes more and more important, samples taken allows for representing the feature of most of gas in apparatus body, and to guarantee not by extraneous gas Body pollution often manually samples currently on the market there has been no mature SF6 gas sampling device, and sampling process is cumbersome, and It is difficult to ensure that sampling container clean up and to extraneous completely isolated, we combine " electrical equipment SF6 gas thus Sampling method " power industry standard, research and develop this sampling method.
Summary of the invention
In view of the above drawbacks of the prior art, it is an object of the invention to provide a kind of sulfur hexafluoride sampling method, solutions Determined field sampling manual sampling when due to not vacuumized to pipeline, inevitably bring air and moisture content into, while once The case where steel cylinder leakage occurs, then can not acquire sample.
It is realized the purpose of the present invention is technical solution in this way, a kind of sulfur hexafluoride sampling method, it includes:
S1: starting vacuum pump judges whether the pressure in vacuum pump reaches preset value;If not up to, illustrating that vacuum pump is deposited In gas leakage, sampling is exited;Conversely, then entering step S2;
S2: by vacuum pump static 3 minutes, checking whether vacuum degree declines, if not declining, illustrates that this presence of vacuum is leaked Gas exits sampling;Conversely, entering step S3;
S3: opening solenoid valve and start qi of chong channel ascending adversely, and all valves are closed when reaching sampling pressure and complete sampling.
Further, the step S3 has been specifically included:
S31: it opens solenoid valve and starts qi of chong channel ascending adversely;
S32: start to be vented after pressure reaches air inlet setting value;
S33: it is vacuumized after pressure reaches exhaust setting value;
S34: repeating step S31 to step S33, and all valves are closed when reaching sampling pressure and complete sampling.
Further, further include having to be detected by detection pipe, detection method is as follows:
S40: initializing detection port, opens solenoid valve and flow control valve and starts timing;
S41: judging whether the time reaches setting value, if it is, entering step S42;Conversely, return step S40;
S42: stopping emptying, ventilates to detection pipe, judges whether volume reaches setting value, if it is, entering step S43;Conversely, return step S42;
S43: closing all valves, completes sampling.
It further, further include having sampling module, the sampling module includes 4 solenoid valves and 1 vacuum pump, for real When monitor pressure sensor signal.
Further, the detection of the detection pipe is carried out by detection pipe detection module, and the detection pipe detection module is used for Realize the control of Electronic mass flow meter, the conversion of voltage signal and flow signal, the control of sample introduction and emptying solenoid valve and The conversion of flow volume.
By adopting the above-described technical solution, the present invention has the advantage that: when solving field sampling manual sampling Due to not vacuumizing to pipeline, air and moisture content are inevitably brought into.Simultaneously once steel cylinder leakage occurs, then can not acquire The case where sample.The intensity of manual labor is alleviated using intelligent automatic operation simultaneously.It improves work efficiency.It is especially first It is secondary to introduce high-precision electronic mass flow controller, increase detection pipe detection function.At the scene using inspection before solving Test tube measures more troublesome status.SF is saved simultaneously6The discharge and waste of gas.The present invention is using portable design, complete Sealing sampling, it can be ensured that sample is undistorted, and has flow control function, can accurately set flow, is convenient for and right The more demanding SF6 gas detecting instrument connection of flow accuracy.
Other advantages, target and feature of the invention will be illustrated in the following description to a certain extent, and And to a certain extent, based on will be apparent to those skilled in the art to investigating hereafter, Huo Zheke To be instructed from the practice of the present invention.
Detailed description of the invention
Detailed description of the invention of the invention is as follows:
Fig. 1 is the flow diagram of sulfur hexafluoride sampling method.
Fig. 2 is the detection schematic diagram of detection pipe.
Fig. 3 is steel cylinder sample program module interactive interface schematic diagram.
Fig. 4 is sampling bag sampling module schematic diagram.
Fig. 5 is detection pipe detection module schematic diagram.
Fig. 6 is sampling system process of gas path schematic diagram.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
Embodiment, as shown in Figures 1 to 6;A kind of sulfur hexafluoride sampling method, it includes:
S 1: starting vacuum pump judges whether the pressure in vacuum pump reaches preset value;If not up to, illustrating that vacuum pump is deposited In gas leakage, sampling is exited;Conversely, then entering step S2;
S2: by vacuum pump static 3 minutes, checking whether vacuum degree declines, if not declining, illustrates that this presence of vacuum is leaked Gas exits sampling;Conversely, entering step S3;
S3: opening solenoid valve and start qi of chong channel ascending adversely, and all valves are closed when reaching sampling pressure and complete sampling.
The step S3 has been specifically included:
S31: it opens solenoid valve and starts qi of chong channel ascending adversely;
S32: start to be vented after pressure reaches air inlet setting value;
S33: it is vacuumized after pressure reaches exhaust setting value;
S34: repeating step S31 to step S33, and all valves are closed when reaching sampling pressure and complete sampling.
Further include having to be detected by detection pipe, detection method is as follows:
S40: initializing detection port, opens solenoid valve and flow control valve and starts timing;
S41: judging whether the time reaches setting value, if it is, entering step S42;Conversely, return step S40;
S42: stopping emptying, ventilates to detection pipe, judges whether volume reaches setting value, if it is, entering step S43;Conversely, return step S42;
S43: closing all valves, completes sampling.
It further include having sampling module, the sampling module includes 4 solenoid valves and 1 vacuum pump, is used for real-time monitoring Pressure sensor signal.
The detection of the detection pipe is carried out by detection pipe detection module, and the detection pipe detection module is for realizing electronics The control of mass flowmenter, the conversion of voltage signal and flow signal, the control and flow volume of sample introduction and emptying solenoid valve Conversion.
As shown in fig. 6, in figure valve 1 be two-position three way magnetic valve, by the switching to the threeway battery valve can control from The gas flow sampler or flow detection tube detection device that air inlet is entered.Valve 2 is that two-position two-way solenoid valve is used to control System enters the gas switch of sampling bag or sampling steel cylinder, and it is the switch valve of vacuum pump front end that valve 3, which is two-position two-way solenoid valve, protects Card closes this switch valve after the evacuation is completed can guarantee the vacuum degree of system, the leakage after preventing vacuum pump from shutting down.Valve 4 is Two-position two-way solenoid valve is the gas in discharge system, for when rinsing sampling or before system vacuumizes, emptying system Gas in system protects vacuum pump not work in situation with pressure.
Valve 5 is two-position three way magnetic valve, and the gas for change detection pipe front end is by detection pipe or emptying.Generally It is the directly emptying before flow system flow is stablized, after waiting flow system flows to stablize, detection pipe is switched in gas circuit and is measured.It reaches To after setting volume, emptying is automatically switched to.To ensure that the accuracy of measurement volume.
Specific sampling process has, and it is as follows that steel cylinder samples detailed process:
Valve 1 powers on, and switches to P and leads to O
Valve 2 is in close state;
Valve 3 is in close state;
Valve 1 is in the open state.
Vacuum pump is in the open state;
Keep that this state continues 5 minutes or pressure reaches 20Kpa,
Valve 1 is closed, and vacuum pump closes, and such as more than five minutes pressure cannot reach 20Kpa prompt: " system gas leakage or vacuum pump Failure please check " and audible alarm
It keeps this state 3 minutes, shows there is air-leak section if pressure reaches 30KPa, prompt: system gas leakage.And sound Alarm
As all gone well, it is transferred to downstream automatically.Sampling bottle self-test process.
Valve 2 is in close state;
Valve 1 is in the open state.
Vacuum pump is in the open state;
Keep that this state continues 5 minutes or pressure reaches 20Kpa,
Valve 1 is closed, and vacuum pump closes, and such as more than five minutes pressure cannot reach 20Kpa prompt: " system gas leakage or vacuum pump Failure please check " and audible alarm
It keeps this state 3 minutes, shows there is air-leak section if pressure reaches 30KPa, prompt: system gas leakage.And sound Alarm
As normal, then enter downstream sweeping process.
Triple valve 1 stops being powered, and keeps p and A logical, and valve 2, which is opened when pressure reaches 0.2MPa, stops ventilation
Switching three-way valve keeps P and O logical.Static 10 seconds
Opening valve 3 is vented to pressure and reaches 0.01MPa.
One sweeping process is completed
Start next sweeping process: the number of the sweeping process can be set as needed.About 3-6 times.
Take air-flow journey.
Triple valve 1 stops being powered, and keeps p and A logical, valve 2, which is opened when pressure reaches 0.4MPa (state value can be set), to be stopped Triple valve 1 is closed in ventilation, closes valve 2,
Whole flow process terminates.
Detection pipe testing process is as follows:
Valve 1 is closed.
Electronic mass flow meter is powered on;
Valve 5 is closed;
Keep this state 5 minutes (time can set);
Valve 1 is closed;
Electronic mass flow meter is powered on;
Valve 5 is opened;
Kept for this state, 8 seconds (400mL is reached according to flow relocity calculation integrated flow volume);
Electronic mass flow meter is closed;
Valve 5 is closed;
Language, auditory tone cues.
Due to not vacuumizing to pipeline when the present invention solves field sampling manual sampling, air is inevitably brought into And moisture content.Simultaneously once the case where steel cylinder leaks, then can not acquire sample occurs.It is alleviated simultaneously using intelligent automatic operation The intensity of manual labor.It improves work efficiency.It has especially been firstly introduced high-precision electronic mass flow controller, has been increased Detection pipe detection function.It solves and measured more troublesome status using detection pipe at the scene in the past.SF is saved simultaneously6Gas Discharge and waste.
It should be understood by those skilled in the art that, embodiments herein can provide as method, system or computer program Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the application Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the application, which can be used in one or more, The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces The form of product.
The application is referring to method, the process of equipment (system) and computer program product according to the embodiment of the present application Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates, Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one The step of function of being specified in a box or multiple boxes.
Finally it should be noted that: the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, to the greatest extent Invention is explained in detail referring to above-described embodiment for pipe, it should be understood by those ordinary skilled in the art that: still It can be with modifications or equivalent substitutions are made to specific embodiments of the invention, and without departing from any of spirit and scope of the invention Modification or equivalent replacement, should all cover within the scope of the claims of the present invention.

Claims (5)

1. a kind of sulfur hexafluoride sampling method, which is characterized in that the method comprises the following steps:
S1: starting vacuum pump judges whether the pressure in vacuum pump reaches preset value;If not up to, illustrating there is leakage in vacuum pump Gas exits sampling;Conversely, then entering step S2;
S2: it by vacuum pump static 3 minutes, checks whether vacuum degree declines, if not declining, illustrates that vacuum originally has gas leakage, move back It samples out;Conversely, entering step S3;
S3: opening solenoid valve and start qi of chong channel ascending adversely, and all valves are closed when reaching sampling pressure and complete sampling.
2. sulfur hexafluoride sampling method as described in claim 1, which is characterized in that the step S3 has been specifically included:
S31: it opens solenoid valve and starts qi of chong channel ascending adversely;
S32: start to be vented after pressure reaches air inlet setting value;
S33: it is vacuumized after pressure reaches exhaust setting value;
S34: repeating step S31 to step S33, and all valves are closed when reaching sampling pressure and complete sampling.
3. sulfur hexafluoride sampling method as described in claim 1, which is characterized in that further include having to be examined by detection pipe It surveys, detection method is as follows:
S40: initializing detection port, opens solenoid valve and flow control valve and starts timing;
S41: judging whether the time reaches setting value, if it is, entering step S42;Conversely, return step S40;
S42: stopping emptying, ventilates to detection pipe, judges whether volume reaches setting value, if it is, entering step S43;Instead It, return step S42;
S43: closing all valves, completes sampling.
4. sulfur hexafluoride sampling method as described in claim 1, which is characterized in that it further include having sampling module, the sampling Module includes 4 solenoid valves and 1 vacuum pump, is used for monitoring pressure in real time sensor signal.
5. sulfur hexafluoride sampling method as claimed in claim 3, which is characterized in that the detection of the detection pipe passes through detection pipe Detection module carries out, and the detection pipe detection module is for realizing the control of Electronic mass flow meter, voltage signal and flow letter Number conversion, the control of sample introduction and emptying solenoid valve and the conversion of flow volume.
CN201811285795.XA 2018-10-31 2018-10-31 A kind of sulfur hexafluoride sampling method Pending CN109253900A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811285795.XA CN109253900A (en) 2018-10-31 2018-10-31 A kind of sulfur hexafluoride sampling method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811285795.XA CN109253900A (en) 2018-10-31 2018-10-31 A kind of sulfur hexafluoride sampling method

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7456939B2 (en) * 2003-07-25 2008-11-25 Lightwind Corporation Method and apparatus for chemical monitoring
CN201348579Y (en) * 2009-01-14 2009-11-18 重庆电力科学试验研究院 Sulfur hexafluoride sample collection device
CN203772728U (en) * 2014-01-21 2014-08-13 南京顺泰科技有限公司 Sulfur hexafluoride gas sampling spectrum detection device
CN205301006U (en) * 2015-12-04 2016-06-08 广东电网有限责任公司电力科学研究院 A SF6 gas sampling ware for sulfur hexafluoride electrical equipment
CN105865556A (en) * 2016-03-10 2016-08-17 国网江西省电力科学研究院 A detection method for the quantity of sulfur hexafluoride gas leakage in a GIS
CN107376418A (en) * 2016-09-15 2017-11-24 二氧化碳创新有限公司 Portable supercritical fluid extraction instrument
CN207065079U (en) * 2017-06-01 2018-03-02 武汉拓普联合电力设备有限公司 Full-automatic SF6 gases recovery charge and discharge device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7456939B2 (en) * 2003-07-25 2008-11-25 Lightwind Corporation Method and apparatus for chemical monitoring
CN201348579Y (en) * 2009-01-14 2009-11-18 重庆电力科学试验研究院 Sulfur hexafluoride sample collection device
CN203772728U (en) * 2014-01-21 2014-08-13 南京顺泰科技有限公司 Sulfur hexafluoride gas sampling spectrum detection device
CN205301006U (en) * 2015-12-04 2016-06-08 广东电网有限责任公司电力科学研究院 A SF6 gas sampling ware for sulfur hexafluoride electrical equipment
CN105865556A (en) * 2016-03-10 2016-08-17 国网江西省电力科学研究院 A detection method for the quantity of sulfur hexafluoride gas leakage in a GIS
CN107376418A (en) * 2016-09-15 2017-11-24 二氧化碳创新有限公司 Portable supercritical fluid extraction instrument
CN207065079U (en) * 2017-06-01 2018-03-02 武汉拓普联合电力设备有限公司 Full-automatic SF6 gases recovery charge and discharge device

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