CN201034763Y - Gas-actuated relay calibration stand - Google Patents

Gas-actuated relay calibration stand Download PDF

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Publication number
CN201034763Y
CN201034763Y CNU2007200901836U CN200720090183U CN201034763Y CN 201034763 Y CN201034763 Y CN 201034763Y CN U2007200901836 U CNU2007200901836 U CN U2007200901836U CN 200720090183 U CN200720090183 U CN 200720090183U CN 201034763 Y CN201034763 Y CN 201034763Y
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China
Prior art keywords
gas
solenoid valve
oil
relay
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Expired - Lifetime
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CNU2007200901836U
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Chinese (zh)
Inventor
张灿利
郝尚平
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Zhengzhou Sail Electronic Co., Ltd.
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SAIAO ELECTRONICS CO Ltd ZHENGZHOU
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Priority to CNU2007200901836U priority Critical patent/CN201034763Y/en
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Publication of CN201034763Y publication Critical patent/CN201034763Y/en
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Abstract

The utility model belongs to a gas relay calibration stand, which is a gas relay calibration stand realizing that using testing pipes of same diameter to detect the heavy gas velocity values of various gas relays of different calibers, different types, and different manufacturers, and from home and abroad, through adopting single chip microcomputer measurement and control technique and establishing a perfect database suitable for the velocity measurement of all gas relays of different calibers, different types, and different manufacturers, and from home and abroad. The utility model includes an oil tank which is provided with an oil pump. The oil pump is connected with an electric valve connected with an oil outlet, a flow meter, and the fixed end of a clamping mechanism successively via oil pipes. A relay of target gas is arranged between the fixed end of the clamping mechanism and the active end of the clamping mechanism; the active end is connected with the electric valve and the return oil inlet of the oil tank through an oil pipe, so as to achieve the goal that using testing pipes of same diameter to detect quantitatively the velocity values of the gas relays of various calibers. The utility model has the advantages of high automatic degree, exact testing, and good reproducibility.

Description

The Buchholz relay checking table
Technical field
The utility model belongs to a kind of gas relay checking table, be specifically related to a kind of when the analogue transformer internal fault gas relay action mechanism, adopt the scm observe and control technology, by setting up perfect different bores, different model, the domestic and international gas relay fluid-velocity survey of the different manufacturers database of being applicable to, on based on a kind of basis of demarcating flow velocity quantitative measurment method, realize finishing the Buchholz relay checking table of the heavy gas flow speed value detection of different bores, different model, the domestic and international all gases Buchholz relay of different manufacturers with the test pipeline of same caliber.
Technical background
At present; the widely used big-and-middle-sized oil-immersed power transformer of electric system; mostly adopted the relay protection of multiple electric weight type; as: differential protection, current quick, zero-sequence current protection, gas relay protection and non electrical quantity type; as pressure relief valve; safeguard measure, and gas relay protection most important a kind of safeguard measure when claiming also that protection is oil-immersed power transformer generation internal fault.When turn-to-turn short circuit appears in oil-filled transformer inside, during faults such as insulation damages, loose contact, multipoint earthing of iron core, can in time send fault alarm and excise faulty equipment from electrical network rapidly, reduce the generation of electric power accident, improve the safe reliability of power equipment operation.
The sensitivity of gas relay protection is depended on the detection of the heavy gas flow speed value of gas relay and light methane gas volumetric values and is adjusted.Though electric system has for many years spent great amount of manpower at gas relay heavy gas flow speed value and light methane gas volumetric values context of detection every year, material resources and financial resources, but because the limitation of checkout equipment and detection means, the electric power accident that causes the gas relay frequent movement to cause because of multiple reason happens occasionally, for guaranteeing the safe operation of power transformer, how accurately to detect and to adjust gas relay flow speed value and gas volume value, this has become Operation of Electric Systems, maintenance, the relevant personnel's such as test extensive concern and questions of common interest, this also is to be engaged in the electric power checkout equipment development and production aspect relevant personnel should pay close attention to problem.
The Buchholz relay checking table is the specialized equipment at the used methane gas relay verification of electric system, domestic production Buchholz relay checking table is being relatively backward aspect method of testing and the accuracy of detection at present, and similar products are mainly adopting following two kinds of methods aspect the flow velocity test:
The observational measurement method is the conversion pressure flow velocity method: this method is to be placed more small-bore test oil circuit by the verification gas relay, make gas relay inside be full of test(ing) medium, in the test pipeline that is communicated with gas relay one end, apply certain pressure, open the valve on the test pipeline that is communicated with the gas relay other end then, this moment is because the effect of pipeline inner pressure can produce temporary impact oil stream flows through from gas relay inside, and gas pressure value is scaled flow velocity, to realize detecting the purpose of flow speed value.Its advantage of pick-up unit of utilizing this kind method of testing to make be simple in structure, in light weight, volume is little, but its disadvantage is can only qualitative detection, measuring accuracy is poor, usable range is little, can only detect gas relay, the complex operation of 25 calibers, and need know the value of tested gas relay in advance.
The actual flow velocity detection method: this method is the test pipeline that will be placed by the verification gas relay with its identical bore, regulates then and flows through by the flow of verification gas relay oil, to realize detecting the purpose of flow speed value.Its advantage of pick-up unit of utilizing this kind method of testing be test accurately, can accomplish detection by quantitative, need not to know flow speed value before the test by the verification gas relay, but its disadvantage is the test pipeline that the gas relay of equipment heaviness, different bores need adopt different bores, an equipment can't satisfy existing gas relay, one may need to buy the same gas relay checkout equipment of 2-3 platform with producing, if tested gas relay is retrofited or new product occurred and need improve device hardware, limited the adaptability of device.
Summary of the invention
The purpose of this utility model is to overcome deficiency of the prior art and provides a kind of by Single-chip Controlling, finish with same bore test pipeline that the heavy gas flow speed value of different bores, different model, the domestic and international various Buchholz relays of different manufacturers detects, and have volume little, in light weight, simple to operate, use reliable, labour intensity is low, the Buchholz relay checking table of high efficiency.
The purpose of the utility model device is achieved in that and comprises fuel tank, fuel tank is provided with oil pump, oil pump links to each other by motorized valve, flowmeter and the clamp system fixed end that oil pipe links to each other with oil-out in regular turn, be provided with gas relay to be measured between clamp system fixed end and the clamp system moved end, the clamp system moved end is connected with oil return opening on the fuel tank by oil pipe and motorized valve, constitutes gas relay heavy gas flow speed test loop oil circuit; Air pump by pipeline successively with air pump and gas-holder between solenoid valve, the gas-holder installed link to each other, and be connected with clamp system fixed end on the above-mentioned heavy gas flow speed test loop oil circuit by solenoid valve, the solenoid valve of installing between air pump, air pump and the gas-holder, gas-holder, solenoid valve constitute gas relay sealing property test pipeline together with above-mentioned heavy gas flow speed test loop oil circuit; Volume pump one end links to each other with fuel tank, the other end is connected with above-mentioned heavy gas flow speed test loop oil circuit by the solenoid valve that links to each other with pressure transducer, the solenoid valve that is communicated with atmosphere is connected with clamp system fixed end in the above-mentioned heavy gas flow speed test loop oil circuit, and volume pump, the solenoid valve that links to each other with pressure transducer, the solenoid valve that is communicated with atmosphere constitute the pipeline that the light methane gas volume of gas relay is tested together with above-mentioned heavy gas flow speed test loop oil circuit.Single Chip Microcomputer (SCM) system is installed in the rear side of liquid crystal display place panel, controls solenoid valve, solenoid valve, the solenoid valve that links to each other with pressure transducer, the solenoid valve that is communicated with atmosphere, air pump, frequency converter, pressure transducer and the signals collecting terminal of installing between the motorized valve that links to each other with oil-out, motorized valve, flowmeter, volume pump, air pump and the gas-holder by Single Chip Microcomputer (SCM) system; Single Chip Microcomputer (SCM) system is connected with power supply.The below of gas relay to be measured is provided with elevating mechanism between described clamp system fixed end and the clamp system moved end.Described clamp system moved end is provided with the grip nut screw rod.Described oil pump links to each other with frequency converter in being installed in switch board.Described Single Chip Microcomputer (SCM) system respectively with the motorized valve that links to each other with oil-out, motorized valve, flowmeter, volume pump, air pump and gas-holder between install solenoid valve, solenoid valve, the solenoid valve that links to each other with pressure transducer, be connected with solenoid valve, air pump, pressure transducer, printer, information acquisition terminal, frequency converter, PC communication interface, liquid crystal display that atmosphere is communicated with.
Principle of work of the present utility model is as follows:
The heavy gas flow speed detection method of Buchholz relay checking table is:
Tested gas relay is installed between clamp system fixed end and the clamp system moved end, open the motorized valve on the oil return opening of fuel tank by Single Chip Microcomputer (SCM) system control, oil pump outlet motorized valve, Single Chip Microcomputer (SCM) system is regulated the rotating speed of oil pump by frequency converter, oily flow velocity degree in the pipeline is progressively increased from 0, Single Chip Microcomputer (SCM) system is by gathering the instantaneous delivery pulse signal of flowmeter in real time, and according to the bore of tested gas relay, the difference of model and manufacturer, by calling related data in the initialized data base, after the traffic pulse that collects carried out calculation process, conversion is the flow velocity of corresponding tested gas relay, after oily flow velocity degree reaches certain value, tested gas relay plate washer action, the contact adhesive, single-chip microcomputer receives the heavy gas flow speed value testing end signal, and the control oil pump stops, and finishes the heavy gas flow speed value test, note the flow speed value after convert this moment, this value is the heavy gas action flow speed value of tested gas relay.
The light gas volumetric values detection method of Buchholz relay checking table is:
Tested gas relay is installed between clamp system fixed end and the clamp system moved end, make oil circuit and measured relay inside be full of test oil, close the motorized valve of installing on the oil return opening of fuel tank by Single Chip Microcomputer (SCM) system control, oil pump outlet motorized valve, close the sealing test solenoid valve, open an end atmosphere and the solenoid valve that is communicated with, the solenoid valve that links to each other with volume pump, start volume pump, and the liquid displacement of real-time accumulated volume pump, when gas relay inner chamber pasta drops to certain liquid level, when the light gas contact of gas relay is connected, Single Chip Microcomputer (SCM) system receives light gas volumetric values testing end signal, finish the test of gas action volumetric values, and note the accumulative total liquid displacement of volume pump at this moment, this value is the light gas action volumetric values of tested gas relay.
The sealing property detecting method of Buchholz relay checking table is:
Tested gas relay is installed between clamp system fixed end and the clamp system moved end, make oil circuit and measured relay inside be full of test oil, close the motorized valve of installing on the oil return opening of fuel tank by Single Chip Microcomputer (SCM) system control, oil pump outlet motorized valve, close light gas test solenoid valve, open the sealing test solenoid valve, booster air pump is exerted pressure to pipeline, line pressure is progressively increased, Single Chip Microcomputer (SCM) system monitoring in real time and demonstration line pressure, when pressure reaches predefined pressure, close solenoid valve, stop air pump, system enters pressurize, and whether pressurize finishes the back single-chip microcomputer initial force value that finishes of record automatically, qualified in order to the sealing property of judging tested gas relay.
The utlity model has following advantage:
1, to adopt a kind of demarcation fluid-velocity survey method be flow velocity conversion method to the utility model device, it overlaps the perfect various model gas relay fluid-velocity survey databases that are applicable to by setting up one, reaches the purpose of finishing various different bore gas relay flow speed value detection by quantitative with the test pipeline of same bore.
2, the utility model device is a flow velocity conversion method owing to having adopted a kind of demarcation fluid-velocity survey method, make device aspect weight and volume, reduce greatly, be adopt same method of testing existing equipment 1/3rd, use installation and transportation to bring great convenience to the user.
3, the utility model device is regulated the oil stream output of oil stream cycling element by frequency conversion control unit, the oil body flow velocity that flows through gas relay to be verified is progressively changed, gas relay action mechanism greatly improves the gas relay accuracy of detection during analogue transformer internal fault.
4, the utility model device has adopted high-precision volumetric metering unit, automatically finish the measurement of light gas volume by Single-chip Controlling, thoroughly solved in the past by read Buchholz relay volume scale to be measured obtain light gas volumetric values because of artificial reading, scale is inaccurate or the low problem of the low measuring accuracy that brings of precision, have light gas test accurately, high, the good reproducibility of precision;
5, the utility model device is by Single-chip Controlling, by gathering the force value of high-precision pressure sensor, automatically, can finish pressurization, pressurize of experiments of sealing performance etc. according to testing requirements automatically, pressure size and dwell time user can set as required, have automatic degree height, accurate, the good reproducibility of test.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is a side view of the present utility model;
Fig. 3 is a rear view of the present utility model;
Fig. 4 is a fundamental diagram of the present utility model.
Fig. 5 is a block scheme of the present utility model.
Embodiment
Shown in Fig. 1,2,3,4,5, the utility model comprises fuel tank 1, fuel tank 1 is provided with oil pump 2, oil pump 2 links to each other by motorized valve 13, flowmeter 19 and the clamp system fixed end 5 that oil pipe links to each other with oil-out in regular turn, be provided with gas relay 12 to be measured between clamp system fixed end 5 and the clamp system moved end 7, clamp system moved end 7 is connected with oil return opening on the fuel tank 1 by oil pipe and motorized valve 3, constitutes gas relay heavy gas flow speed test loop oil circuit; Air pump 20 by pipeline successively with air pump 20 and gas-holder 21 between solenoid valve 15, the gas-holder 21 installed link to each other, and be connected with clamp system fixed end 5 on the above-mentioned heavy gas flow speed test loop oil circuit by solenoid valve 9, the solenoid valve of installing between air pump 20, air pump 20 and the gas-holder 21 15, gas-holder 21, solenoid valve 9 constitute gas relay sealing property test pipeline together with above-mentioned heavy gas flow speed test loop oil circuit; Volume pump 14 1 ends link to each other with fuel tank 1, the other end is connected with above-mentioned heavy gas flow speed test loop oil circuit by the solenoid valve 18 that links to each other with pressure transducer 25, the solenoid valve 4 that is communicated with atmosphere is connected with clamp system fixed end 5 in the above-mentioned heavy gas flow speed test loop oil circuit, and volume pump 14, the solenoid valve 18 that links to each other with pressure transducer 25, the solenoid valve 4 that is communicated with atmosphere constitute the pipeline that the light methane gas volume of gas relay is tested together with above-mentioned heavy gas flow speed test loop oil circuit; Single Chip Microcomputer (SCM) system 11 is installed in the rear side of liquid crystal display 24 place panels, controls solenoid valve 15, solenoid valve 9, the solenoid valve 18 that links to each other with pressure transducer 25, the solenoid valve 4 that is communicated with atmosphere, air pump 20, frequency converter 17, pressure transducer 25 and the signals collecting terminal of installing between the motorized valve 13 that links to each other with oil-out, motorized valve 3, flowmeter 19, volume pump 14, air pump 20 and the gas-holder 21 22 by Single Chip Microcomputer (SCM) system 11; Single Chip Microcomputer (SCM) system 11 is connected with power supply.The below of gas relay 12 to be measured is provided with elevating mechanism 6 between described clamp system fixed end 5 and the clamp system moved end 7.Described clamp system moved end 7 is provided with grip nut screw rod 8.Described oil pump 2 links to each other with frequency converter 17 in being installed in switch board 16.Described Single Chip Microcomputer (SCM) system 11 respectively with the motorized valve 13 that links to each other with oil-out, motorized valve 3, flowmeter 19, volume pump 14, air pump 20 and gas-holder 21 between install solenoid valve 15, solenoid valve 9, the solenoid valve 18 that links to each other with pressure transducer 25, be connected with solenoid valve 4, air pump 20, pressure transducer 25, printer 23, information acquisition terminal 22, frequency converter 17, PC communication interface, the liquid crystal display 24 of atmosphere connection.
Described Single Chip Microcomputer (SCM) system 11 respectively with frequency converter 17, printer 23, signals collecting terminal 22, PC communication interface, liquid crystal display 24, motorized valve 3, the motorized valve 13 that links to each other with oil-out, air pump 20 and gas-holder 21 between install solenoid valve 15, be connected with solenoid valve 4, the solenoid valve 18 that links to each other with pressure transducer 25, solenoid valve 9, gas relay to be measured 12, volume pump 14, flowmeter 19, air pump 20 that atmosphere is communicated with.
Motorized valve 3 on the oil return opening of described fuel tank 1, oil pump 2 and fuel tank 1, with solenoid valve 4, clamp system fixed end 7, clamp system moved end 5, grip nut screw rod 8, solenoid valve 9, the motorized valve 13 that links to each other with oil-out, volume pump 14, air pump 20 and gas-holder 21 that atmosphere is communicated with between solenoid valve 15, the solenoid valve 18 that links to each other with pressure transducer, flowmeter 19, air pump 20, gas-holder 21, switch board 16, the frequency converter 17 of installation be installed in the housing 10.
Described Single Chip Microcomputer (SCM) system 11 control motorized valves, light gas are realized the switching of test pipeline with the break-make of solenoid valve with solenoid valve, sealing;
The startup of described Single Chip Microcomputer (SCM) system 11 control oil pumps 2, volume pump 14, air pump 20 stops to realize applying of the control of oily flow velocity degree, flow metering, seal test pressure;
The traffic pulse of described Single Chip Microcomputer (SCM) system 11 recording flowmeters 19, volume pump 14 is realized the test of flow velocity, volume, gathers the control that seal test pressure is realized seal test pressure by pressure transducer.
Heavy gas flow speed value method of testing of the present utility model:
The utility model device adopts a kind of flow velocity conversion method promptly to demarcate flow velocity method, realizes finishing with the test pipeline of same bore the detection of the heavy gas flow speed value of different bores, different model, different manufacturers gas relay.
Tested gas relay 12 is installed in the above-described gas relay heavy gas flow speed test loop oil circuit, open motorized valve 3 and the motorized valve 13 that links to each other with oil-out by Single Chip Microcomputer (SCM) system 11 controls, close the solenoid valve 4 that is communicated with atmosphere, solenoid valve 9, the solenoid valve of installing between air pump 20 and the gas-holder 21 15, the solenoid valve 18 that links to each other with pressure transducer, oil pump 2, Single Chip Microcomputer (SCM) system 11 is regulated the rotating speed of oil pump 2 by frequency converter 17, oily flow velocity degree in the pipeline is progressively increased from 0, described Single Chip Microcomputer (SCM) system 11 is by gathering the instantaneous delivery pulse signal of flowmeter 19 in real time, and according to the bore of tested gas relay 12, the difference of model and manufacturer, by calling related data in the initialized data base, after the traffic pulse that collects carried out calculation process, conversion is a flow velocity conversion method for the flow velocity of corresponding tested gas relay 12, after oily flow velocity degree reaches certain value, tested gas relay 12 plate washers action, the contact adhesive, single-chip microcomputer receives the heavy gas flow speed value testing end signal, and control oil pump 2 stops, finish the heavy gas flow speed value test, and note flow speed value after this moment conversion, the heavy gas that this value is tested gas relay 12 moves flow speed value.
Light gas volumetric values method of testing of the present utility model:
Tested gas relay 12 is installed in the above-described gas relay heavy gas flow speed test loop oil circuit, make oil circuit and measured relay 12 inside be full of oil, close motorized valve 3 and the motorized valve 13 that links to each other with oil-out by Single Chip Microcomputer (SCM) system 11 controls, close solenoid valve 9, the solenoid valve of installing between air pump 20 and the gas-holder 21 15, open the solenoid valve 4 that is communicated with atmosphere with the solenoid valve 18 that links to each other with pressure transducer 25, start precision metering pump 14, and the liquid displacement of real time record cumulative measurement pump 14, when gas relay 12 inner chamber pastas drop to certain liquid level, when gas relay 12 light gas contacts are connected, Single Chip Microcomputer (SCM) system 11 receives light gas volumetric values testing end signal, finish the test of gas action volumetric values, and note the accumulative total liquid displacement of volume pump 14 at this moment, this value is the light gas action volumetric values of tested gas relay 12.
Airtight performance test method of the present utility model:
Tested gas relay 12 is installed in the described gas relay heavy gas flow speed test loop oil circuit, make oil circuit and measured relay 12 inside be full of oil, close motorized valve 3 and the motorized valve 13 that links to each other with oil-out by Single Chip Microcomputer (SCM) system 11 controls, close the solenoid valve 4 and the solenoid valve 18 that links to each other with pressure transducer that are communicated with atmosphere, open the solenoid valve of installing between air pump 20 and the gas-holder 21 15 in order, solenoid valve 9, booster air pump 20 is exerted pressure to pipeline, line pressure is progressively increased, Single Chip Microcomputer (SCM) system 11 monitoring in real time and demonstration line pressure, when pressure reaches predefined pressure, close solenoid valve 15, stop air pump 20, system enters pressurize, pressurize finishes the back single-chip microcomputer, and record is initial automatically, finish force value, whether qualified in order to the sealing property of judging tested gas relay 12.

Claims (5)

1. a Buchholz relay checking table comprises fuel tank (1), it is characterized in that:
A, fuel tank (1) are provided with oil pump (2), oil pump (2) links to each other with clamp system moved end (7) by motorized valve (13), the flowmeter (19) that oil pipe links to each other with oil-out in regular turn, be provided with gas relay to be measured (12) between clamp system fixed end (5) and clamp system moved end (7), clamp system fixed end (7) is connected with oil return opening on the fuel tank (1) by oil pipe and motorized valve (3), constitutes gas relay heavy gas flow speed test loop oil circuit;
B, air pump (20) by pipeline successively with air pump (20) and gas-holder (21) between solenoid valve (15), the gas-holder (21) of installation link to each other, and be connected with clamp system fixed end (5) on the heavy gas flow speed test loop oil circuit described in a by solenoid valve (9), the solenoid valve of installing between air pump (20), air pump (20) and the gas-holder (21) (15), gas-holder (21), solenoid valve (9) constitute gas relay sealing property test pipeline together with the heavy gas flow speed test loop oil circuit described in a;
C, volume pump (14) one ends link to each other with fuel tank (1), the other end is connected with the heavy gas flow speed test loop oil circuit described in a by the solenoid valve (18) that links to each other with pressure transducer (25), the solenoid valve (4) that is communicated with atmosphere is connected volume pump (14) with the clamp system fixed end (5) in the heavy gas flow speed test loop oil circuit described in a, the solenoid valve (18) that links to each other with pressure transducer (25), the solenoid valve (4) that is communicated with atmosphere constitutes the pipeline that the light methane gas volume of gas relay is tested together with the heavy gas flow speed test loop oil circuit described in a;
D, Single Chip Microcomputer (SCM) system (11) are installed in the rear side of liquid crystal display (24) place panel, control solenoid valve (15), solenoid valve (9), the solenoid valve (18) that links to each other with pressure transducer (25), the solenoid valve (4) that is communicated with atmosphere, air pump (20), frequency converter (17), pressure transducer (25) and the signals collecting terminal of installing between the motorized valve (13) that links to each other with oil-out, motorized valve (3), flowmeter (19), volume pump (14), air pump (20) and the gas-holder (21) (22) by Single Chip Microcomputer (SCM) system (11); Single Chip Microcomputer (SCM) system (11) is connected with power supply.
2. a kind of Buchholz relay checking table according to claim 1 is characterized in that: the below of gas relay to be measured (12) is provided with elevating mechanism (6) between described clamp system fixed end (5) and clamp system moved end (7).
3. a kind of Buchholz relay checking table according to claim 1 is characterized in that: described clamp system moved end (7) is provided with grip nut screw rod (8).
4. a kind of Buchholz relay checking table according to claim 1 is characterized in that: described oil pump (2) frequency converter (17) interior with being installed in switch board (16) links to each other.
5. a kind of Buchholz relay checking table according to claim 1 is characterized in that: described Single Chip Microcomputer (SCM) system (11) respectively with the motorized valve that links to each other with oil-out (13), motorized valve (3), flowmeter (19), volume pump (14), the solenoid valve of installing between air pump (20) and the gas-holder (21) (15), solenoid valve (9), the solenoid valve (18) that links to each other with pressure transducer (25), the solenoid valve that is communicated with atmosphere (4), air pump (20), pressure transducer (25), printer (23), information acquisition terminal (22), frequency converter (17), the PC communication interface, liquid crystal display (24) is connected.
CNU2007200901836U 2007-04-28 2007-04-28 Gas-actuated relay calibration stand Expired - Lifetime CN201034763Y (en)

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Application Number Priority Date Filing Date Title
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102455408A (en) * 2010-10-27 2012-05-16 华东电力试验研究院有限公司 Gas relay calibration detection device and method
CN102620895A (en) * 2012-03-21 2012-08-01 重庆市电力公司电力科学研究院 Device and method for seal test of floating ball type gas relay
CN102890161A (en) * 2012-10-23 2013-01-23 上海市电力公司 Flow velocity measurement method and device for field calibration of gas relay
CN103808480A (en) * 2012-11-14 2014-05-21 中国广东核电集团有限公司 Nuclear power station transformer gas relay seismic test method
CN104569481A (en) * 2014-12-03 2015-04-29 国网河南省电力公司电力科学研究院 Oil flow speed acquiring system for gas relay, and heavy-gas setting-value verifying method
CN106679892A (en) * 2016-11-30 2017-05-17 国家电网公司 Gas relay leakproofness detection device
CN108375727A (en) * 2018-03-20 2018-08-07 国家电投集团河南电力有限公司技术信息中心 A kind of gas-actuated relay calibration stand and its method of calibration

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102455408A (en) * 2010-10-27 2012-05-16 华东电力试验研究院有限公司 Gas relay calibration detection device and method
CN102620895A (en) * 2012-03-21 2012-08-01 重庆市电力公司电力科学研究院 Device and method for seal test of floating ball type gas relay
CN102620895B (en) * 2012-03-21 2014-12-10 重庆市电力公司电力科学研究院 Device for seal test of floating ball type gas relay
CN102890161A (en) * 2012-10-23 2013-01-23 上海市电力公司 Flow velocity measurement method and device for field calibration of gas relay
CN103808480A (en) * 2012-11-14 2014-05-21 中国广东核电集团有限公司 Nuclear power station transformer gas relay seismic test method
CN104569481A (en) * 2014-12-03 2015-04-29 国网河南省电力公司电力科学研究院 Oil flow speed acquiring system for gas relay, and heavy-gas setting-value verifying method
CN104569481B (en) * 2014-12-03 2018-04-10 国网河南省电力公司电力科学研究院 Buchholz relay oil stream flow velocity acquisition system and grave gas setting valve method of calibration
CN106679892A (en) * 2016-11-30 2017-05-17 国家电网公司 Gas relay leakproofness detection device
CN108375727A (en) * 2018-03-20 2018-08-07 国家电投集团河南电力有限公司技术信息中心 A kind of gas-actuated relay calibration stand and its method of calibration

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