CN201666920U - Full-automatic dielectric loss and volume resistivity tester - Google Patents
Full-automatic dielectric loss and volume resistivity tester Download PDFInfo
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- CN201666920U CN201666920U CN2009202919532U CN200920291953U CN201666920U CN 201666920 U CN201666920 U CN 201666920U CN 2009202919532 U CN2009202919532 U CN 2009202919532U CN 200920291953 U CN200920291953 U CN 200920291953U CN 201666920 U CN201666920 U CN 201666920U
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Abstract
The utility model provides a full-automatic dielectric loss and volume resistivity tester which is characterized in that the bottom of a test cup is provided with an oil discharge outlet, and the top part thereof is provided with an oil inlet, an oil spilling port, a temperature testing head and a signal testing head; a sampling device comprises a beaker in which an oil conduit is inserted, a sampling tee joint, an oil pump and an exhaust control valve, wherein the three ends of the tee joint are respectively connected with the oil inlet, the oil conduit inserted in the beaker and a pipeline connected with the exhaust control valve by the oil pump; the oil conduit provided with an oil spillage sensor and an oil spillage control valve is additionally arranged, the tail end of the oil conduit is connected with one end of the oil discharge tee joint, another end of the oil discharge tee joint is connected with the oil discharge outlet of the test cup by the oil conduit provided with an oil discharge control valve, and the third end of the oil discharge tee joint is used as an oil outlet; and the input end of a CPU is respectively connected with the oil spillage sensor and the signal testing head through a signal processing module, and the output end thereof is respectively connected with the exhaust control valve, the oil discharge control valve, the oil spillage control valve and the control end of the oil pump. The full-automatic dielectric loss and volume resistivity tester can conduct whole full-automatic test, and has accurate measurement and high test efficiency.
Description
Technical field
The utility model provides a kind of dielectric loss and specific insulation full-automatic detection apparatus, belongs to the electric measuring instrument technical field.
Background technology
The safe operation of oil-filled power transformer is the important topic that power supply department is faced.Because the insulativity of transformer oil can be subjected to the influence of several factors, such as moisture, impurity, microorganism, oil degradations etc. for guaranteeing the transformer safe and stable operation, need instant its every index of correlation that detects.Very little at the oil deterioration product, in the time of still can not discovering with chemical method, dielectric dissipation factor and specific insulation just significantly distinguish.Therefore, the mensuration of dielectric dissipation factor and specific insulation is the important means of oil quality analysis inspection and supervision, has special meaning.How to know the dielectric dissipation factor and the specific insulation of transformer insulation oil, numerical analysis both at home and abroad has many methods, as zero passage voltage relative method, mistake zero time difference relative method, harmonic analysis method, alien frequencies power supply method etc.,, also inequality between the whole bag of tricks to the measurement result of same insulating oil owing to principle, evaluation method difference.Harmonic analysis method and alien frequencies power supply method are easy, easy-to-use, measure accurately, and domestic existing employing, but all be manual operations, need to repeat manual sampling, the manual test cup that cleans, process is loaded down with trivial details, and efficient is lower.
The utility model content
Dielectric loss and specific insulation full-automatic detection apparatus that the purpose of this utility model provides a kind ofly can overcome above-mentioned defective, measure accurately, testing efficiency is high.Its technology contents is:
A kind of dielectric loss and specific insulation full-automatic detection apparatus, comprise rack-mounted test cup, sampling device, discharge equipment, CPU and signal processing module, it is characterized in that: the test cup adopts the test cup of sealing, the bottom is provided with oil drain out, and the top is provided with oil-in, oil spilling mouth, temperature test head and signal testing head; Sampling device comprises beaker, sample introduction threeway, oil pump and the gas exhausting valve that is inserted with oil guide pipe, and wherein an end of sample introduction threeway connects the oil-in of testing cup through oil pump, and the other end patches the oil guide pipe into beaker, and the 3rd termination is provided with the pipeline of gas exhausting valve; Set up the oil guide pipe that is provided with oil spilling sensor and oil spilling operation valve, a run in end of oily threeway of the end of this oil guide pipe, the oil guide pipe of the other end of oil extraction threeway through being provided with the oil extraction operation valve connects the oil drain out of test cup, and the 3rd end of oil extraction threeway is as oil-out; The input end of CPU connects the oil spilling sensor respectively and connects the signal testing head through signal processing module, and output terminal connects first relay of control gas exhausting valve, second relay of control oil extraction operation valve, the 3rd relay of control oil spilling operation valve and the 4th relay of control oil pump respectively.
Described dielectric loss and specific insulation full-automatic detection apparatus, the locating ring sealing of test cup is installed on the step of external electrode inwall upper end, the gland screw thread is installed on the external electrode locating ring is compressed, oil-in, oil spilling mouth, temperature test head and signal testing head all pass gland and are installed on the locating ring, in the cavity that electrode and external electrode formed in wherein the end of oil-in, oil spilling mouth, temperature test head inserted, the end of signal testing head is connected with interior electrode.
Described dielectric loss and specific insulation full-automatic detection apparatus, signal processing module comprises the electric current amplification module, filtration module, A/D converter, wherein the electric current amplification module comprises first operational amplifier, first diode, second diode and first resistance, the inverting input of first operational amplifier connects the signal testing head, and through first diode of parallel connection, the second diode ground connection, the first operational amplifier in-phase input end ground connection, the inverting input of first resistance, one termination, first operational amplifier, the output terminal of another termination first operational amplifier, the output termination filtration module of first operational amplifier; Filtration module comprises second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, first electric capacity, second electric capacity and second operational amplifier, wherein the in-phase input end of second operational amplifier is successively through second resistance, the 3rd resistance connects the output terminal of first operational amplifier, and through second capacity earth, the inverting input of second operational amplifier is through the 5th resistance eutral grounding, and connect the output terminal of second operational amplifier through the 4th resistance, the output terminal of second operational amplifier connects second resistance through first electric capacity, the junction of the 3rd resistance, and connect the input end of CPU through A/D converter, the signal that the signal testing head is recorded amplifies, be transformed into digital signal after the filtering, output to CPU and carry out computing.
Its principle of work is: during test, CPU control gas exhausting valve is opened, the oil spilling operation valve is closed, starting oil pump starts working, air enters the test cup from the pipeline that is provided with gas exhausting valve, CPU control oil extraction operation valve is opened, insulating oil in the emptying test cup, CPU control oil extraction operation valve and gas exhausting valve are closed then, the oil spilling operation valve is opened, oil pump injects insulating oil to be tested in the beaker in the test cup, up to oil spilling sensor output oil spilling signal, the oil spilling operation valve is closed in CPU control, the oil pump official hour that works on applies certain pressure to the test cup, keeps the gas and oil equilibration of insulating oil.By signal processing module signal in the signal testing head collecting test cup is amplified, is transformed into digital signal after the filtering, output to CPU and carry out computing, obtain dielectric dissipation factor and specific insulation.
The utility model compared with prior art, its advantage is:
1, in the whole test process, the cleaning of test cup, sample introduction, emptying all realize intelligent control by CPU, need not manual operations, automaticity height, testing efficiency height.
2, adopt the test cup of sealing, keep the gas and oil equilibration of insulating oil in the measuring process, measure high conformity, the result is more accurate.
Description of drawings
Fig. 1 is the physical construction synoptic diagram among the utility model embodiment.
Fig. 2 is the circuit diagram of present embodiment signal processing module.
Fig. 3 is the circuit diagram of the utility model CPU and signal processing module, oil pump and each operation valve.
Among the figure: 1, frame 2, oil drain out 3, oil-in 4, oil spilling mouth 5, temperature test head 6, signal testing head 7, oil guide pipe 8, beaker 9, sample introduction threeway 10, oil pump 11, gas exhausting valve 12, oil spilling sensor 13, oil spilling operation valve 14, oil extraction threeway 15, oil-out 16, gland 17, external electrode 18, locating ring 19, O RunddichtringO 20, interior electrode 21, cavity 22, oil extraction operation valve 23, pipeline 24, fixed plate A, the first operational amplifier B, the second operational amplifier C1, first capacitor C 2, the second electric capacity D1, the first diode D2, the second diode R1, first resistance R 2, second resistance R 3, the 3rd resistance R 4, the 4th resistance R 5, the 5th resistance K1, first relay K 2, second relay K 3, the 3rd relay K 4, the 4th relay
Embodiment
In the embodiment shown in fig. 1: the test cup is installed on the frame 1, locating ring 18 sealings of test cup are installed on the step of external electrode 17 inwalls upper end, gland 16 screw threads are installed on the external electrode 17, oil-in 3, oil spilling mouth 4, temperature test head 5 and signal testing head 6 all pass gland 16 and are installed on the locating ring 18, in the cavity 21 that electrode 20 and external electrode 17 formed in wherein the end of oil-in 3, oil spilling mouth 4, temperature test head 5 inserted, the end of signal testing head 6 is connected with interior electrode 20.Sampling device comprises beaker 8, sample introduction threeway 9, oil pump 10 and the gas exhausting valve 11 that is inserted with oil guide pipe 7, wherein an end of sample introduction threeway 9 connects the oil-in 3 of test cup through oil pump 10, the other end patches the pipeline 23 that is provided with gas exhausting valve 11 into oil guide pipe 7, the three terminations of beaker 8; Set up the oil guide pipe 7 that is provided with oil spilling sensor 12 and oil spilling operation valve 13, a run in end of oily threeway 14 of the end of this oil guide pipe 7, the oil guide pipe 7 of the other end of oil extraction threeway 14 through being provided with oil extraction operation valve 22 connects the oil drain out 2 of test cup, and the 3rd end of oil extraction threeway 14 is as oil-out 15.
In the embodiment shown in Fig. 2-3: the electric current amplification module comprises first operational amplifier A, the first diode D1, the second diode D2 and first resistance R 1, wherein the inverting input of first operational amplifier A connects signal testing head 6, and through the first diode D1, the second diode D2 ground connection of parallel connection, the first operational amplifier A in-phase input end ground connection, the inverting input of first resistance R, 1 one terminations, first operational amplifier A, the output terminal of another termination first operational amplifier A, the output termination filtration module of first operational amplifier A; Filtration module comprises second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, first capacitor C 1, second capacitor C 2 and the second operational amplifier B, wherein the in-phase input end of the second operational amplifier B is successively through second resistance R 2, the 3rd resistance R 3 connects the output terminal of first operational amplifier A, and through second capacitor C, 2 ground connection, the inverting input of the second operational amplifier B is through the 5th resistance R 5 ground connection, and connect the output terminal of the second operational amplifier B through the 4th resistance R 4, the output terminal of the second operational amplifier B connects second resistance R 2 through first capacitor C 1, the junction of the 3rd resistance R 3, and connect input end 41 pin of CPU through A/D converter U1, input end 17 pin of CPU, 20 pin connect oil spilling sensor 12, output terminal 14 pin connect first relay K 1,15 pin connect second relay K 2 and the 3rd relay K 3,16 pin connect the 4th relay K 4, the first relay K 1, second relay K 2, the 3rd relay K 3, the normally opened contact of the 4th relay K 4 is serially connected in oil pump 10 respectively, gas exhausting valve 11, oil extraction operation valve 22, in the power circuit of oil spilling operation valve 13.
Claims (3)
1. dielectric loss and specific insulation full-automatic detection apparatus, comprise the test cup, sampling device, discharge equipment, CPU and the signal processing module that are installed on the frame (1), it is characterized in that: the test cup adopts the test cup of sealing, the bottom is provided with oil drain out (2), and the top is provided with oil-in (3), oil spilling mouth (4), temperature test head (5) and signal testing head (6); Sampling device comprises beaker (8), sample introduction threeway (9), oil pump (10) and the gas exhausting valve (11) that is inserted with oil guide pipe (7), one end of wherein sample introduction threeway (9) connects the oil-in (3) of test cup through oil pump (10), the other end patches into the oil guide pipe of beaker (8) (7), and the 3rd termination is provided with the pipeline (23) of gas exhausting valve (11); Set up the oil guide pipe (7) that is provided with oil spilling sensor (12) and oil spilling operation valve (13), a run in end of oily threeway (14) of the end of this oil guide pipe (7), the oil guide pipe (7) of the other end of oil extraction threeway (14) through being provided with oil extraction operation valve (22) connects the oil drain out (2) of test cup, and the 3rd end of oil extraction threeway (14) is as oil-out (15); The input end of CPU connects oil spilling sensor (12) respectively and connects signal testing head (6) through signal processing module, and output terminal connects the relay K 1～4 of control gas exhausting valve (11), oil extraction operation valve (22), oil spilling operation valve (13) and oil pump (10) respectively.
2. dielectric loss as claimed in claim 1 and specific insulation full-automatic detection apparatus, it is characterized in that: locating ring (18) sealing of test cup is installed on the step of external electrode (17) inwall upper end, gland (16) screw thread is installed on the external electrode (17), oil-in (3), oil spilling mouth (4), temperature test head (5) and signal testing head (6) all pass gland (16) and are installed on the locating ring (18), oil-in (3) wherein, oil spilling mouth (4), in the cavity (21) that electrode (20) and external electrode (17) formed in the end of temperature test head (5) inserted, the end of signal testing head (6) is connected with interior electrode (20).
3. dielectric loss as claimed in claim 1 and specific insulation full-automatic detection apparatus, it is characterized in that: signal processing module comprises the electric current amplification module, filtration module, A/D converter U1, wherein the electric current amplification module comprises operational amplifier A, diode D1～2 and resistance R 1, the inverting input of operational amplifier A connects signal testing head (6), and through diode connected in parallel D1～2 ground connection, operational amplifier A in-phase input end ground connection, the inverting input of resistance R 1 one termination operational amplifier A, the output terminal of another termination operational amplifier A, the output termination filtration module of operational amplifier A; Filtration module comprises resistance R 2～5, capacitor C 1～2 and operational amplifier B, wherein the in-phase input end of operational amplifier B connects the output terminal of operational amplifier A successively through resistance R 2～3, and through capacitor C 2 ground connection, the inverting input of operational amplifier B is through resistance R 5 ground connection, and connect the output terminal of operational amplifier B through resistance R 4, the output terminal of operational amplifier B is through the junction of capacitor C 1 connecting resistance R2～3, and connects the input end of CPU through A/D converter U1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202919532U CN201666920U (en) | 2009-12-09 | 2009-12-09 | Full-automatic dielectric loss and volume resistivity tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202919532U CN201666920U (en) | 2009-12-09 | 2009-12-09 | Full-automatic dielectric loss and volume resistivity tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201666920U true CN201666920U (en) | 2010-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009202919532U Expired - Lifetime CN201666920U (en) | 2009-12-09 | 2009-12-09 | Full-automatic dielectric loss and volume resistivity tester |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101957405B (en) * | 2009-12-09 | 2012-09-05 | 山东中惠仪器有限公司 | Full automatic detection device for dielectric loss and volume resistivity |
| CN102654534A (en) * | 2011-03-03 | 2012-09-05 | 重庆师范大学 | Method and device for testing magneto-rheological grease (liquid) electromagnetic property |
| CN102901753A (en) * | 2012-09-24 | 2013-01-30 | 杭州泰林生物技术设备有限公司 | Liquid oxidation detection electrode and equipment thereof |
| CN104267264A (en) * | 2014-09-16 | 2015-01-07 | 国家电网公司 | Transformer insulation oil dielectric loss and electrical resistivity automatic detecting system |
| CN104166049B (en) * | 2014-08-20 | 2016-08-17 | 太原理工大学 | A kind of soil resistivity test device of insulating materials |
| CN106199210A (en) * | 2016-09-29 | 2016-12-07 | 国网四川省电力公司电力科学研究院 | Dielectric loss on-line detecting system |
| CN106680593A (en) * | 2017-03-06 | 2017-05-17 | 云南电网有限责任公司电力科学研究院 | Dielectric spectrum experimental system of high-voltage sleeve at operating temperature |
| CN107121459A (en) * | 2017-06-15 | 2017-09-01 | 淄博纳瑞仪器有限公司 | Full-automatic specific insulation analyzer |
-
2009
- 2009-12-09 CN CN2009202919532U patent/CN201666920U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101957405B (en) * | 2009-12-09 | 2012-09-05 | 山东中惠仪器有限公司 | Full automatic detection device for dielectric loss and volume resistivity |
| CN102654534A (en) * | 2011-03-03 | 2012-09-05 | 重庆师范大学 | Method and device for testing magneto-rheological grease (liquid) electromagnetic property |
| CN102901753A (en) * | 2012-09-24 | 2013-01-30 | 杭州泰林生物技术设备有限公司 | Liquid oxidation detection electrode and equipment thereof |
| CN104166049B (en) * | 2014-08-20 | 2016-08-17 | 太原理工大学 | A kind of soil resistivity test device of insulating materials |
| CN104267264A (en) * | 2014-09-16 | 2015-01-07 | 国家电网公司 | Transformer insulation oil dielectric loss and electrical resistivity automatic detecting system |
| CN104267264B (en) * | 2014-09-16 | 2017-02-01 | 国家电网公司 | Transformer insulation oil dielectric loss and electrical resistivity automatic detecting system |
| CN106199210A (en) * | 2016-09-29 | 2016-12-07 | 国网四川省电力公司电力科学研究院 | Dielectric loss on-line detecting system |
| CN106680593A (en) * | 2017-03-06 | 2017-05-17 | 云南电网有限责任公司电力科学研究院 | Dielectric spectrum experimental system of high-voltage sleeve at operating temperature |
| CN107121459A (en) * | 2017-06-15 | 2017-09-01 | 淄博纳瑞仪器有限公司 | Full-automatic specific insulation analyzer |
| CN107121459B (en) * | 2017-06-15 | 2019-08-23 | 淄博纳瑞仪器有限公司 | Full-automatic volume resistivity analyzer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20101208 Effective date of abandoning: 20091209 |