CN103323287B - 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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- CN103323287B CN103323287B CN201310218811.4A CN201310218811A CN103323287B CN 103323287 B CN103323287 B CN 103323287B CN 201310218811 A CN201310218811 A CN 201310218811A CN 103323287 B CN103323287 B CN 103323287B
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- 238000005070 sampling Methods 0.000 title claims abstract description 85
- HYBBIBNJHNGZAN-UHFFFAOYSA-N furfural Chemical compound O=CC1=CC=CO1 HYBBIBNJHNGZAN-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000007788 liquid Substances 0.000 claims abstract description 31
- 238000001914 filtration Methods 0.000 claims abstract description 13
- 239000012530 fluid Substances 0.000 claims description 40
- 238000006073 displacement reaction Methods 0.000 claims description 22
- 238000007664 blowing Methods 0.000 claims description 15
- 239000002699 waste material Substances 0.000 claims description 12
- 239000000284 extract Substances 0.000 claims description 10
- 238000000605 extraction Methods 0.000 claims description 7
- 230000004907 flux Effects 0.000 claims description 4
- 239000000446 fuel Substances 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 4
- 238000000691 measurement method Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 36
- 238000005516 engineering process Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000004128 high performance liquid chromatography Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- Sampling And Sample Adjustment (AREA)
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, particularly relate to a kind of transformer oil furfural automatic sampling device and sampling method.
Background technology
At present, transformer is the visual plant in electric system, once have an accident, then may cause large-area power-cuts, maintenance cycle is long, and maintenance cost is high and affect wide.According to statistics, the accident formed because of various types of insulation fault accounts for more than 85% of whole Accident of Transformer, and in 10 years of past, in electric power system fault reason, insulation ag(e)ing is listed in second.
Furfural content monitoring technology in the transformer oil used at present, be considered to comparatively efficient pressure swing device solid insulation and can't harm ageing diagnosing techniques, 1993, in IEC standard is listed the method for testing of furfural in mineral oil by International Electrotechnical Commission.Due to furfural content in transformer oil lower (mg/l level), all adopt HPLC method (high-efficient liquid phase chromatogram technology), this technology for detection precision is high, it is a general chemistry detection technique, but the extraction process in early stage of sample is carried out in this technical requirement, and operative technique level requirement is high, needs special messenger to use, and apparatus expensive, is not suitable for promoting the use of.
Summary of the invention
The object of this invention is to provide a kind of transformer oil furfural automatic sampling device and sampling method, simple measuring method can be adopted to complete 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 gets hydraulic fluid port by valve 1 connection transformer, be provided with filtering layer in sampling container, the oil-out of sampling container passes through the oil transportation mouth of valve 2 and flow totalizer connection transformer oil vessel; The liquid outlet of described extractant container connects liquid variable output pump by valve 6, and variable displacement fluid pump connects the input port of sampling container; Described sample to be detected connects liquid variable output pump by valve 7, and the inlet of described waste fluid container connects liquid variable output pump by valve 8; The control end of each described valve is connected with the control output end of control device, the signal input part of the signal output part connection control device of described flow quantity recorder.
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, vacuum delivery side of pump is gas outlet, and valve 5 is connected with the control output end of control device with the control end of valve 3.
The oil-out of described sampling container also connects 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 transformer oil filter paper three layers.
According to the automatic sampling method that described transformer oil furfural automatic sampling device realizes, comprise the following steps: (1), startup control device, control device cuts out all valves and flow quantity recorder, pump; Setup parameter; (2), transformer is got hydraulic fluid port flexible pipe and receive transformer fuel outlet; (3), control device opens valve 1, valve 2 and valve 3, startup vacuum pump, extraction oil sample automatically; The oil sample extracted enters in transformer oil container through flow totalizer, flow totalizer is by the integrated flux of measurement stored in control device, and control device valve-off 1, valve 2, valve 3 and vacuum pump after completing, in sampling process, oil sample is through filtering layer, and furfural is filtered at filtering layer; (4), control device opens valve 6, start liquid variable output pump automatically, extracts extractant and enter sampling container from extractant container; After completing, automatic closing liquid variable output pump and valve 6; (5), control device opens 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, reverse starting variable displacement fluid pump automatically, extracts extractant 5-20ml in sampling container and enters sample receiver to be detected, automatic-closing valve 7 and variable displacement fluid pump; (7), control device opens valve 8 and valve 9 automatically, and reverse starting variable displacement fluid pump, remains extractant by sampling container, put into waste fluid container, automatic-closing valve 8, valve 9 and variable displacement fluid pump.
Also include step (8) after described step (7) completes: valve 6 opened automatically by control device, start liquid variable output pump, from extractant container, extract 100-300ml extractant enter sampling container; After completing, closing liquid variable output pump and valve 6; Then automatically open valve 8 and valve 9, reverse starting variable displacement fluid pump, remains extractant by sampling container, puts into waste fluid container; Automatic-closing valve 8, valve 9 and variable displacement fluid pump; Then repeat this step, complete the cleaning process of sampling container.
The extraction dosage extracting extractant in described step (4) from extractant container with the ratio extracting oil sample is: 1:10.
The time starting air-blowing pump in step (5) is 10 minutes; Leave standstill after described step (5) completes and enter step (6) after 5 minutes.
The present invention proposes a kind of highly effective transformer oil furfural automatic sampling device integrating concentrated sampling, oil sample pre-treatment automatically, after using this device to sample, the furfural sample that concentration is higher can be obtained, operator can be made to adopt in laboratory simple measuring method to complete efficient, the Quick Measurement of furfural content.
Accompanying drawing explanation
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 gets hydraulic fluid port 25 by valve 1 connection transformer, filtering layer 15 is provided with in sampling container 14, the oil-out of described sampling container 14, by the oil transportation mouth of pipeline connection transformer oil vessel 21, pipeline is provided with valve 2 and flow totalizer 16; 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 each described valve is connected with the control output end of control device 20, the signal input part of the signal output part connection control device of described flow quantity recorder 16; The signal input part of the equal connection control device 20 of control end of described variable displacement fluid pump 13, air-blowing pump 11, vacuum pump 12.Wherein said filtering layer 15 adopts transformer oil filter paper three layers.
The automatic sampling method utilizing above-mentioned transformer oil furfural automatic sampling device to realize, comprises the following steps: (1), startup control device 20, and control device 20 cuts out all valves and flow quantity recorder 16, pump; According to sampling requirement, setting integrated flux or by arranging the amount and time that the oil well pump working time controls to draw oil sample;
(2), transformer is got hydraulic fluid port 25 flexible pipe and receive transformer fuel outlet;
(3), control device 20 opens valve 1, valve 2 and valve 3, startup vacuum pump 12, extraction oil sample automatically; The oil sample extracted enters in transformer oil container 21 through flow totalizer 16, flow totalizer 16 by measure integrated flux stored in control device 20, control device 20 automatic-closing valve 1, valve 2, valve 3 and vacuum pump 12 after completing, in sampling process, oil sample is through filtering layer 15, and furfural is filtered at filtering layer;
(4), control device 20 opens valve 6, start liquid variable output pump 13 automatically, extracts extractant and enter sampling container 14 from extractant container 17, wherein extracts dosage with the ratio extracting oil sample to be: 1:10; After completing, control device 20 is closing liquid variable output pump 13 and valve 6 automatically;
(5), control device 20 opens valve 4, valve 5 automatically, starts air-blowing pump control device 20 automatic-closing valve 4, valve 5 and air-blowing pump 11 after 11,10 minutes;
(6), leave standstill after 5 minutes, valve 7 opened automatically by control device 20, reverse starting variable displacement fluid pump 13, extract extractant 5-20ml(in sampling container 15 to determine according to used sample to be tested container size) enter sample receiver 18 to be detected, control device 20 automatic-closing valve 7 and variable displacement fluid pump 13;
(7), control device 20 opens valve 8 and valve 9 automatically, and reverse starting variable displacement fluid pump 13, remains extractant by sampling container, puts into waste fluid container 19, then automatic-closing valve 8, valve 9 and variable displacement fluid pump 13;
(8), control device opens valve 6, start liquid variable output pump 13 automatically, extracts 100-300ml extractant (concrete extraction amount can take oil sample requirement to determine according to real transformer) and enter sampling container from extractant container 17; After completing, automatic closing liquid variable output pump and valve 6; Open valve 8 and valve 9 so automatically, reverse starting variable displacement fluid pump 13, remains extractant by sampling container, puts into waste fluid container 19; Control device 20 automatic-closing valve 8, valve 9 and variable displacement fluid pump 13; Then repeat this step, complete the cleaning process of sampling container.
Claims (10)
1. a 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 gets hydraulic fluid port by valve one (1) connection transformer, be provided with filtering layer in sampling container, the oil-out of sampling container passes through the oil transportation mouth of valve two (2) and flow totalizer connection transformer oil vessel; The liquid outlet of described extractant container connects liquid variable output pump by valve six (6), and variable displacement fluid pump connects the input port of sampling container; Described sample to be detected connects liquid variable output pump by valve seven (7), and the inlet of waste fluid container connects liquid variable output pump by valve eight (8); The control end of each described valve is connected with the control output end of control device, the signal input part of the signal output part connection control device of described flow quantity recorder.
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 five (5), the oil-out of described sampling container also connects vacuum pump by valve three (3), vacuum delivery side of pump is gas outlet, and valve five (5) is connected with the control output end of control device with the control end of valve three (3).
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 air-blowing pump by valve four (4), the other end of air-blowing pump is air intake opening, and the control end of valve four (4) is connected with the control output end of control device.
4. transformer oil furfural automatic sampling device according to claim 3, it is characterized in that: the oil-out of described sampling container connects the inlet of waste fluid container by valve nine (9), the control end of valve nine (9) is connected with the control output end of control device.
5. transformer oil furfural automatic sampling device according to claim 4, is characterized in that: the oil-out of described transformer oil container is connected with valve ten (10), and the control end of valve ten (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: described filtering layer adopts transformer oil filter paper three layers.
7. the automatic sampling method of transformer oil furfural automatic sampling device realization according to claim 6, is characterized in that: comprise the following steps: (one), startup control device, and control device cuts out all valves and flow quantity recorder, pump; Setup parameter; (2), transformer is got hydraulic fluid port flexible pipe and receive transformer fuel outlet; (3), control device opens valve one (1), valve two (2) and valve three (3), startup vacuum pump, extraction oil sample automatically; The oil sample extracted enters in transformer oil container through flow totalizer, flow totalizer by measure integrated flux stored in control device, control device valve-off one (1), valve two (2), valve three (3) and vacuum pump after completing, in sampling process, oil sample is through filtering layer, and furfural is filtered at filtering layer; (4), control device opens valve six (6), start liquid variable output pump automatically, extracts extractant and enter sampling container from extractant container; After completing, automatic closing liquid variable output pump and valve six (6); (5), control device opens valve four (4), valve five (5), startup air-blowing pump, then valve-off four (4), valve five (5) and air-blowing pump automatically; (6), control device opens valve seven (7), reverse starting variable displacement fluid pump automatically, extracts extractant 5-20ml in sampling container and enters sample receiver to be detected, automatic-closing valve seven (7) and variable displacement fluid pump; (7), control device opens valve eight (8) and valve nine (9) automatically, and reverse starting variable displacement fluid pump, remains extractant by sampling container, put into waste fluid container, automatic-closing valve eight (8), valve nine (9) and variable displacement fluid pump.
8. automatic sampling method according to claim 7, it is characterized in that: also include step (eight) after described step (seven) completes: valve six (6) opened automatically by control device, start liquid variable output pump, extracts 100-300ml extractant and enters sampling container from extractant container; After completing, closing liquid variable output pump and valve six (6); Then automatically open valve eight (8) and valve nine (9), reverse starting variable displacement fluid pump, remains extractant by sampling container, puts into waste fluid container; Automatic-closing valve eight (8), valve nine (9) and variable displacement fluid pump; Then repeat this step, complete the cleaning process of sampling container.
9. automatic sampling method according to claim 7, is characterized in that: the extraction dosage extracting extractant in described step (four) from extractant container with the ratio extracting oil sample is: 1:10.
10. automatic sampling method according to claim 7, is characterized in that: the time starting air-blowing pump in step (five) is 10 minutes; Leave standstill after described step (five) completes and enter step (6) after 5 minutes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310218811.4A CN103323287B (en) | 2013-06-04 | 2013-06-04 | Automatic sampling device for sampling furfural in transformer oil and sampling method |
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| CN201310218811.4A CN103323287B (en) | 2013-06-04 | 2013-06-04 | Automatic sampling device for sampling furfural in transformer oil and sampling method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103674622B (en) * | 2013-12-12 | 2015-09-09 | 中广核工程有限公司 | Accumulation corrosion product sampling apparatus |
| CN106442813B (en) * | 2016-11-03 | 2019-03-01 | 广东电网有限责任公司电力科学研究院 | A kind of headspace sampling method |
| 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 |
| 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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| JP3892734B2 (en) * | 2002-02-08 | 2007-03-14 | 株式会社極東エレテック | Method and apparatus for extracting furfurals in oil |
| CN102175502A (en) * | 2011-01-16 | 2011-09-07 | 青海电力科学试验研究院 | Method for oscillated extraction of furfural components from insulated oil |
| CN103076380B (en) * | 2012-12-25 | 2015-09-09 | 广东电网公司电力科学研究院 | Utilize the electrochemical monitoring instrument of interfacial electrochemistry reaction monitoring furfural content in transformer oil |
| CN203432817U (en) * | 2013-06-04 | 2014-02-12 | 国家电网公司 | Automatic sampling device for furfural in transformer oil |
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