CN103323287A - Automatic sampling device for sampling furfural in transformer oil and sampling method - Google Patents
Automatic sampling device for sampling furfural in transformer oil and sampling method Download PDFInfo
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Abstract
The invention discloses an automatic sampling device for sampling furfural in transformer oil. The device comprises a sampling container, an extracting agent container, a sample to be tested container, and a control device. The oil mouth of the sampling container is connected to the oil outlet of a transformer through a valve 1. A filtering layer is provided in the sampling container. The oil outlet of the sampling container is connected to the oil mouth of an oil container of the transformer through a valve 2 and a flow totalizer. The liquid outlet of the extracting agent container is connected to a liquid variable pump through a valve 6. The liquid variable pump is connected to the inlet of the sampling container. A sample to be tested is connected to the liquid variable pump through a valve 7, and the liquid inlet of a waste-liquid container is connected to the liquid variable pump through a valve 8. A high concentration furfural sample can be obtained by controlling corresponding processes through the control device; therefore operators can achieve high-efficient rapid measurement of furfural concentration in the lab by adopting the simple measurement method.
Description
Technical field
The present invention relates to the sampling field of transformer oil, relate in particular to a kind of transformer oil furfural automatic sampling device and sampling method.
Background technology
At present, transformer is the visual plant in the electric system, in case have an accident, then may cause large-area power-cuts, and maintenance cycle is long, and maintenance cost is high and affect wide.According to statistics, the accident that forms because of various types of insulation faults accounts for more than 85% of whole Accident of Transformer, and in 10 years of the past, in the electric power system fault reason, insulation ag(e)ing is listed in second.
Furfural content monitoring technology in the present employed transformer oil is considered to the comparatively harmless ageing diagnosing techniques of efficient pressure swing device solid insulation, and 1993, in the IEC standard was listed the method for testing of furfural in the mineral oil by International Electrotechnical Commission.Because furfural content lower (mg/l level) in the transformer oil, all adopt HPLC method (high-efficient liquid phase chromatogram technology), this technology for detection precision is high, it is a general chemical detection technique, but the extraction processing in early stage of sample is carried out in this technical requirement, and the operative technique level requires high, needs the special messenger to use, and apparatus expensive is not suitable for promoting the use of.
Summary of the invention
The purpose of this invention is to provide a kind of transformer oil furfural automatic sampling device and sampling method, can adopt simple measuring method to finish efficient, the Quick Measurement of furfural content.
The present invention adopts following technical proposals: plant transformer oil furfural automatic sampling device, comprise sampling container, extractant container, sample receiver to be detected, control device, the oil transportation mouth of sampling container is got hydraulic fluid port by valve 1 connection transformer, be provided with filtering layer in the sampling container, the oil-out of sampling container is by the oil transportation mouth of valve 2 and flow totalizer connection transformer oil vessel; The liquid outlet of described extractant container connects the liquid variable output pump by valve 6, and the variable displacement fluid pump connects the input port of sampling container; Described sample to be detected connects the liquid variable output pump by valve 7, and the inlet of described waste fluid container connects the liquid variable output pump by valve 8; The control end of described each valve is connected with the control output end of control device, and the signal output part of described flow quantity recorder connects the signal input part of control device.
The oil transportation mouth of described sampling container also connects admission gear by valve 5, the oil-out of described sampling container also connects vacuum pump by valve 3, the vacuum delivery side of pump is the gas outlet, and the control end that valve 5 is connected with valve is connected with the control output end of control device.
The oil-out of described sampling container also connects the air-blowing pump by valve 4, and the other end of air-blowing pump is air intake opening, and the control end of valve 4 is connected with the control output end of control device.
The oil-out of described sampling container connects the inlet of waste fluid container by valve 9, the control end of valve 9 is connected with the control output end of control device.
The oil-out of described transformer oil container is connected with valve 10, and the control end of valve 10 is connected with the control output end of control device.
Described filtering layer adopts three layers of transformer oil filter paper.
Automatic sampling method according to described transformer oil furfural automatic sampling device is realized may further comprise the steps: all valves and flow quantity recorder, pump are closed in (1), start control device, control device; Setup parameter; (2), transformer is got hydraulic fluid port and received the transformer fuel outlet with flexible pipe; (3), control device is opened valve 1, valve 2 and valve 3, startup vacuum pump, extraction oil sample automatically; The oil sample that extracts enters in the transformer oil container through flow totalizer, flow totalizer deposits the integrated flux of measuring in the control device in, and control device valve-off 1, valve 2, valve 3 and vacuum pump after finishing are in the sampling process, oil sample is through filtering layer, and furfural is filtered at filtering layer; (4), control device opens valve 6 automatically, the start liquid variable output pump extracts extractant and enters sampling container from the extractant container; After finishing, autoshutdown variable displacement fluid pump and valve 6; (5), control device is opened valve 4, valve 5, startup air-blowing pump, then valve-off 4, valve 5 and air-blowing pump automatically; (6), control device opens valve 7 automatically, reverse starting variable displacement fluid pump extracts that extractant 5-20ml enters sample receiver to be detected, automatic-closing valve 7 and variable displacement fluid pump in the sampling container; (7), control device opens valve 8 and valve 9 automatically, reverse starting variable displacement fluid pump with remaining extractant in the sampling container, is put into waste fluid container, automatic-closing valve 8, valve 9 and variable displacement fluid pump.
Also include step (8) after described step (7) is finished: control device is opened valve 6 automatically, and the start liquid variable output pump extracts the 100-300ml extractant and enters sampling container from the extractant container; After finishing, closing liquid variable output pump and valve 6; Then automatically open valve 8 and valve 9, reverse starting variable displacement fluid pump with remaining extractant in the sampling container, is put into waste fluid container; Automatic-closing valve 8, valve 9 and variable displacement fluid pump; Then repeat this step, finish the cleaning process of sampling container.
The extraction dosage that extracts extractant in the described step (4) from the extractant container with the ratio that extracts oil sample is: 1:10.
The time that starts the air-blowing pump in the step (5) is 10 minutes; Leave standstill after described step (5) is finished and enter step (6) after 5 minutes.
The present invention proposes a kind of highly effective transformer oil furfural automatic sampling device that integrates concentrated sampling, automatically oil sample pre-treatment, after using this device sampling, can obtain the higher furfural sample of concentration, can make the operator adopt simple measuring method to finish efficient, the Quick Measurement of furfural content in the laboratory.
Description of drawings
Fig. 1 is structural representation of the present invention.
Embodiment
As shown in Figure 1, a kind of transformer oil furfural automatic sampling device of the present invention, comprise sampling container 14, extractant container 17, sample receiver to be detected 18, control device 20, the oil transportation mouth of sampling container 14 is got hydraulic fluid port 25 by valve 1 connection transformer, be provided with filtering layer 15 in the sampling container 14, the oil-out of described sampling container 14 is provided with valve 2 and flow totalizer 16 by the oil transportation mouth of pipeline connection transformer oil vessel 21 on the pipeline; The oil transportation mouth of described sampling container 14 also connects admission gear 26 by valve 5, and the oil-out of described sampling container 14 also connects vacuum pump 12 by valve 3, and the output terminal of vacuum pump 12 is gas outlet 23; The oil-out of described sampling container 14 also connects air-blowing pump 11 by valve 4, and the other end of air-blowing pump 11 is air intake opening 24; The oil-out of described sampling container 14 connects the inlet of waste fluid container 19 by valve 9; The liquid outlet of described extractant container 17 connects liquid variable output pump 13 by valve 6, and variable displacement fluid pump 13 connects the input port of sampling container 14; Described sample to be detected connects liquid variable output pump 13 by valve 7, and the inlet of described waste fluid container 19 connects liquid variable output pump 13 by valve 8; The oil-out of described transformer oil container 21 connects fuel outlet 22 by valve 10.The control end of described each valve is connected with the control output end of control device 20, and the signal output part of described flow quantity recorder 16 connects the signal input part of control device; The control end of described variable displacement fluid pump 13, air-blowing pump 11, vacuum pump 12 all connects the signal input part of control device 20.Wherein said filtering layer 15 adopts three layers of transformer oil filter paper.
The automatic sampling method of utilizing above-mentioned transformer oil furfural automatic sampling device to realize may further comprise the steps: all valves and flow quantity recorder 16, pump are closed in (1), start control device 20, control device 20; According to sampling requirement, set integrated flux or control amount and the time of drawing oil sample by the oil well pump working time is set;
(2), transformer is got hydraulic fluid port 25 usefulness flexible pipes and received the transformer fuel outlet;
(3), control device 20 is opened valve 1, valve 2 and valve 3, startup vacuum pump 12, extraction oil sample automatically; The oil sample that extracts enters in the transformer oil container 21 through flow totalizer 16, flow totalizer 16 deposits the integrated flux of measuring in the control device 20 in, control device 20 automatic-closing valves 1, valve 2, valve 3 and vacuum pump 12 after finishing, in the sampling process, oil sample is through filtering layer 15, and furfural is filtered at filtering layer;
(4), control device 20 opens valve 6 automatically, start liquid variable output pump 13 extracts extractant and enters sampling container 14 from extractant container 17, wherein extract dosage and with the ratio that extracts oil sample be: 1:10; After finishing, control device 20 autoshutdown variable displacement fluid pump 13 and valves 6;
(5), control device 20 opens valve 4, valve 5 automatically, starts air-blowing pump control device 20 automatic-closing valves 4, valve 5 and air-blowing pump 11 after 11,10 minutes;
(6), leave standstill 5 minutes after, control device 20 is opened valve 7 automatically, reverse starting variable displacement fluid pump 13, extract in the sampling container 15 extractant 5-20ml(big or small definite according to uses sample to be tested container) enter sample receiver 18 to be detected, control device 20 automatic-closing valves 7 and variable displacement fluid pump 13;
(7), control device 20 opens valve 8 and valve 9 automatically, reverse starting variable displacement fluid pump 13 will remain extractant in the sampling container, put into waste fluid container 19, then automatic-closing valve 8, valve 9 and variable displacement fluid pump 13;
(8), control device opens valve 6 automatically, start liquid variable output pump 13 extracts 100-300ml extractant (concrete extraction amount can take the oil sample requirement to determine according to real transformer) and enters sampling container from extractant container 17; After finishing, autoshutdown variable displacement fluid pump and valve 6; Right open valve 8 and valve 9 after automatically, reverse starting variable displacement fluid pump 13 will remain extractant in the sampling container, put into waste fluid container 19; Control device 20 automatic-closing valves 8, valve 9 and variable displacement fluid pump 13; Then repeat this step, finish the cleaning process of sampling container.
Claims (10)
1. transformer oil furfural automatic sampling device, it is characterized in that: comprise sampling container, extractant container, sample receiver to be detected, control device, the oil transportation mouth of sampling container is got hydraulic fluid port by valve 1 connection transformer, be provided with filtering layer in the sampling container, the oil-out of sampling container is by the oil transportation mouth of valve 2 and flow totalizer connection transformer oil vessel; The liquid outlet of described extractant container connects the liquid variable output pump by valve 6, and the variable displacement fluid pump connects the input port of sampling container; Described sample to be detected connects the liquid variable output pump by valve 7, and the inlet of described waste fluid container connects the liquid variable output pump by valve 8; The control end of described each valve is connected with the control output end of control device, and the signal output part of described flow quantity recorder connects the signal input part of control device.
2. transformer oil furfural automatic sampling device according to claim 1, it is characterized in that: the oil transportation mouth of described sampling container also connects admission gear by valve 5, the oil-out of described sampling container also connects vacuum pump by valve 3, the vacuum delivery side of pump is the gas outlet, and the control end that valve 5 is connected with valve is connected with the control output end of control device.
3. transformer oil furfural automatic sampling device according to claim 2, it is characterized in that: the oil-out of described sampling container also connects the air-blowing pump by valve 4, the other end of air-blowing pump is air intake opening, and the control end of valve 4 is connected with the control output end of control device.
4. transformer oil furfural automatic sampling device according to claim 3 is characterized in that: the oil-out of described sampling container connects the inlet of waste fluid containers by valve 9, the control end of valve 9 is connected with the control output end of control device.
5. transformer oil furfural automatic sampling device according to claim 4, it is characterized in that: the oil-out of described transformer oil container is connected with valve 10, and the control end of valve 10 is connected with the control output end of control device.
6. transformer oil furfural automatic sampling device according to claim 5 is characterized in that: three layers of described filtering layer employing transformer oil filter paper.
7. the automatic sampling method that realizes of transformer oil furfural automatic sampling device according to claim 6 is characterized in that: may further comprise the steps: all valves and flow quantity recorder, pump are closed in (1), start control device, control device; Setup parameter; (2), transformer is got hydraulic fluid port and received the transformer fuel outlet with flexible pipe; (3), control device is opened valve 1, valve 2 and valve 3, startup vacuum pump, extraction oil sample automatically; The oil sample that extracts enters in the transformer oil container through flow totalizer, flow totalizer deposits the integrated flux of measuring in the control device in, and control device valve-off 1, valve 2, valve 3 and vacuum pump after finishing are in the sampling process, oil sample is through filtering layer, and furfural is filtered at filtering layer; (4), control device opens valve 6 automatically, the start liquid variable output pump extracts extractant and enters sampling container from the extractant container; After finishing, autoshutdown variable displacement fluid pump and valve 6; (5), control device is opened valve 4, valve 5, startup air-blowing pump, then valve-off 4, valve 5 and air-blowing pump automatically; (6), control device opens valve 7 automatically, reverse starting variable displacement fluid pump extracts that extractant 5-20ml enters sample receiver to be detected, automatic-closing valve 7 and variable displacement fluid pump in the sampling container; (7), control device opens valve 8 and valve 9 automatically, reverse starting variable displacement fluid pump with remaining extractant in the sampling container, is put into waste fluid container, automatic-closing valve 8, valve 9 and variable displacement fluid pump.
8. the automatic sampling method that realizes of transformer oil furfural automatic sampling device according to claim 5, it is characterized in that: also include step (8) after described step (7) is finished: control device is opened valve 6 automatically, the start liquid variable output pump extracts the 100-300ml extractant and enters sampling container from the extractant container; After finishing, closing liquid variable output pump and valve 6; Then automatically open valve 8 and valve 9, reverse starting variable displacement fluid pump with remaining extractant in the sampling container, is put into waste fluid container; Automatic-closing valve 8, valve 9 and variable displacement fluid pump; Then repeat this step, finish the cleaning process of sampling container.
9. the automatic sampling method that realizes of transformer oil furfural automatic sampling device according to claim 5, it is characterized in that: the extraction dosage that extracts extractant in the described step (4) from the extractant container with the ratio that extracts oil sample is: 1:10.
10. the automatic sampling method that realizes of transformer oil furfural automatic sampling device according to claim 5, it is characterized in that: the time that starts the air-blowing pump in the step (5) is 10 minutes; Leave standstill after described step (5) is finished and enter step (6) after 5 minutes.
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Cited By (5)
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| CN103674622A (en) * | 2013-12-12 | 2014-03-26 | 中广核工程有限公司 | Cumulative corrosion product sampling device |
| CN106442813A (en) * | 2016-11-03 | 2017-02-22 | 广东电网有限责任公司电力科学研究院 | Omniseal headspace sampling technology used for measuring dissolved contents in transformer oil |
| CN109765323A (en) * | 2019-01-31 | 2019-05-17 | 广西电网有限责任公司电力科学研究院 | The pretreating device and method of transformer oil liquid-phase chromatographic analysis sample |
| CN112147100A (en) * | 2020-10-14 | 2020-12-29 | 海南电网有限责任公司电力科学研究院 | Portable device for detecting furfural in transformer oil |
| CN113952760A (en) * | 2021-09-24 | 2022-01-21 | 国网山东省电力公司电力科学研究院 | Automatic extraction device for furfural solid phase in transformer oil |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103674622A (en) * | 2013-12-12 | 2014-03-26 | 中广核工程有限公司 | Cumulative corrosion product sampling device |
| CN103674622B (en) * | 2013-12-12 | 2015-09-09 | 中广核工程有限公司 | Accumulation corrosion product sampling apparatus |
| CN106442813A (en) * | 2016-11-03 | 2017-02-22 | 广东电网有限责任公司电力科学研究院 | Omniseal headspace sampling technology used for measuring dissolved contents in transformer oil |
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| CN109765323A (en) * | 2019-01-31 | 2019-05-17 | 广西电网有限责任公司电力科学研究院 | The pretreating device and method of transformer oil liquid-phase chromatographic analysis sample |
| CN109765323B (en) * | 2019-01-31 | 2023-12-29 | 广西电网有限责任公司电力科学研究院 | Pretreatment device and method for sample for liquid chromatography of transformer oil |
| CN112147100A (en) * | 2020-10-14 | 2020-12-29 | 海南电网有限责任公司电力科学研究院 | Portable device for detecting furfural in transformer oil |
| CN112147100B (en) * | 2020-10-14 | 2023-11-14 | 海南电网有限责任公司电力科学研究院 | Portable device for detecting furfural in transformer oil |
| CN113952760A (en) * | 2021-09-24 | 2022-01-21 | 国网山东省电力公司电力科学研究院 | Automatic extraction device for furfural solid phase in transformer oil |
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