CN103048614A - Portable type gas relay scene calibrator - Google Patents
Portable type gas relay scene calibrator Download PDFInfo
- Publication number
- CN103048614A CN103048614A CN2012105337652A CN201210533765A CN103048614A CN 103048614 A CN103048614 A CN 103048614A CN 2012105337652 A CN2012105337652 A CN 2012105337652A CN 201210533765 A CN201210533765 A CN 201210533765A CN 103048614 A CN103048614 A CN 103048614A
- Authority
- CN
- China
- Prior art keywords
- unit
- gas
- value
- gas flow
- relay
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention provides a portable type gas relay scene calibrator, belonging to the field of measurement. The portable type gas relay scene calibrator is provided with a gas flow rate measurement module unit and a gas source unit, wherein the gas flow rate measurement module unit is connected with an oil-way inlet pipeline of a gas relay; the gas source unit is provided with a piston and further connected with the oil-way inlet pipeline of the gas relay through the gas flow rate measurement module unit; a pressure sensor is arranged on an output end of the gas source unit and further used for measuring the size and the change of a pressure value; an analog-to-digital conversion unit and a single chip computer unit are adopted for detecting the working conditions of the gas source unit, the gas flow rate measurement unit and the pressure sensor and recording the action values and the time data; and a single chip computer sends the recorded data to a display unit for displaying. The portable type gas relay scene calibrator is applicable for a synchronous scene calibration test on an action constant value and connection points of the gas relay; in such a way, the technical capability of calibrating the non-electric pressure protection of a transformer is improved and the safe operation of power grid is provided with technical support; and therefore, the portable type gas relay scene calibrator can be widely used in the field of calibration on the gas relay.
Description
Technical field
The invention belongs to fields of measurement, relate in particular to a kind of on-site calibrator for Buchholz relay.
Background technology
For guarantee Buchholz relay action accurately and reliable, the precision maneuver value is measured in the realistic simulation of usually all taking to promote the actuating of relay by transformer oil stream, so calibration equipment volume, weight are all larger, are fit to the laboratory verification of Buchholz relay.
The at present heavy gas calibration of Buchholz relay mainly is by oil speed in the flow sensor measures pipeline, regulates the size of oil speed by motor, records the value of flow sensor when progressively increasing oily speed and reach working value, thereby obtains the flow velocity definite value.For the Buchholz relay of supporting different bores and the accuracy of assurance oil speed, package unit must be all larger on volume and weight, can only be implemented in the calibration in laboratory.
But, during or situation that emergency process tight for some repair times, just can't satisfy field requirement in time.Therefore, for maintenance teams and groups and on-the-spot operation, in the urgent need to the calibrating installation that can use at the scene, increase work efficiency.And domestic field calibration for Buchholz relay is a blank at present always, and on-the-spot do not have a corresponding product with the portable correcting device of Buchholz relay is domestic.
Summary of the invention
Technical matters to be solved by this invention provides a kind of portable gas explosion relay on-site calibrator, it replaces oily stream to come the miniaturization of implement device by gas, tentatively possessed the quickly calibrated ability to Buchholz relay, realized that the on-the-spot test of Buchholz relay and fault tentatively judge.
Technical scheme of the present invention is: a kind of portable gas explosion relay on-site calibrator is provided, it is characterized in that: a gas flow measurement modular unit is set, and described gas flow measurement modular unit links to each other with the oil circuit entrance pipe of Buchholz relay; One gas source unit with piston is set, and described gas source unit links to each other with the oil circuit entrance pipe of Buchholz relay by the gas flow measurement modular unit; At the output terminal of gas source unit, a pressure transducer is set, be used for size and the variation of measured pressure value; Adopt AD conversion unit and single machine unit that the operating mode of gas source unit, gas flow measurement modular unit and pressure transducer is detected and operation of recording value and time data; Single-chip microcomputer is delivered to display unit with recorded data and is shown.
Its described single-chip microcomputer is carried out program of lower computer, carries out respectively calibration, flow rate detection, impermeability detection and communication task.
Its described gas flow measurement modular unit is opened the air pump power supply by programmed control shut electromagnetic valve III and electromagnetic valve I V, and gas flow is crossed retaining valve and pressurizeed to air-capacitor, and pressure measuring value feeds back to single-chip microcomputer by modular pressure I.When the force value that receives during than the large 10kPa of precompressed setting value, close the air pump power supply, regulate force value by electromagnetic valve I V and reach the precompressed setting value.Open electromagnetic valve I electromagnetic valve II and electromagnetic valve II I, pneumatic actuator travels forward.When opening electromagnetic valve II I, begin timing, stop timing during the topworks setting in motion.Single-chip microcomputer is passed to ARM to the state value of photosignal and time value.Topworks moves forward under the effect of gaseous tension.When switch contact 1 action, start clocking capability, when switch contact 2 action, close clocking capability.Single-chip microcomputer is passed to ARM to state value and the time value of switch contact 1 and switch contact 2.In the proal process of topworks, measure the force value of tested end by digital module II, and pressure data is uploaded in real time.
Compared with the prior art, advantage of the present invention is:
1. this device is applicable to the field calibration test of the same period of Buchholz relay action definite value, contact;
2. by this Buchholz relay calibrating installation, make electrical network tentatively possess convenient reliable rated capacity;
3. the verification of transformer non-electricity pressure protect is improved from technical capability, provides technical support to the safe operation of electrical network.
Description of drawings
Fig. 1 is Buchholz relay calibration equipment theory diagram of the present invention;
Fig. 2 is Buchholz relay field calibration device structure principle chart;
Fig. 3 is hardware structure diagram;
Fig. 4 is flow measurement module fundamental diagram.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing.
Among Fig. 1, in order to realize the corresponding of gas flow rate or pressure and oily speed, just must set up the confining gas cavity volume, make gas in the sealing cavity volume, realize controlled, reproducible variation.
Force value when final definite device adopts the measurement gas piston to promote baffle plate reflects that oil speed corresponding to baffle position is big or small, and the theory diagram of device as shown in Figure 1.
Among Fig. 2, be determined by experiment, the mode of making the fast open electromagnetic valve dutycycle between pressure and the control output employing change high-low pressure cavity volume of device is controlled the output of pressure speed and can be realized the controlled of output pressure.Its basic structure is seen Fig. 2.
Among Fig. 3, single-chip microcomputer carries out communication by RS232 interface and digital module and ARM.Receive the zero point correction instruction of ARM and expire the journey calibration command by communications protocol, instruction is passed to digital module by the communications protocol of digital module.Can send zero point correction to single-chip microcomputer after digital module is handled zero point correction and expired the journey calibration command and calibrate the acknowledgement frame of finishing with full journey, after single-chip microcomputer receives and calibrates the acknowledgement frame of finishing, read the force value instruction by communications protocol to the digital module transmission, the force value that digital module reads is passed to host computer by single-chip microcomputer.
Among Fig. 4, fluid-velocity survey is the core of device work, and its precompressed process is as follows: by programmed control shut electromagnetic valve III and electromagnetic valve I V, open the air pump power supply, gas flow is crossed retaining valve and is pressurizeed to air-capacitor, and pressure measuring value feeds back to single-chip microcomputer by modular pressure I.When the force value that receives during than the large 10kPa of precompressed setting value, close the air pump power supply, regulate force value by electromagnetic valve I V and reach the precompressed setting value.Open electromagnetic valve I electromagnetic valve II and electromagnetic valve II I, pneumatic actuator travels forward.When opening electromagnetic valve II I, begin timing, stop timing during the topworks setting in motion.Single-chip microcomputer is passed to ARM to the state value of photosignal and time value.Topworks moves forward under the effect of gaseous tension.When switch contact 1 action, start clocking capability, when switch contact 2 action, close clocking capability.Single-chip microcomputer is passed to ARM to state value and the time value of switch contact 1 and switch contact 2.In the proal process of topworks, measure the force value of tested end by digital module II, and pressure data is uploaded in real time.
Buchholz relay calibrating installation of the present invention; make electrical network tentatively possess convenient reliable rated capacity; chamber checking and on-the-spot test show that this device is applicable to the field calibration of Buchholz relay action definite value, contact same period is tested by experiment; verification to the transformer non-electricity pressure protect is improved from technical capability, provides technical support to the safe operation of electrical network.
The present invention can be widely used in the calibration field of Buchholz relay.
Claims (3)
1. portable gas explosion relay on-site calibrator is characterized in that:
One gas flow measurement modular unit is set, and described gas flow measurement modular unit links to each other with the oil circuit entrance pipe of Buchholz relay;
One gas source unit with piston is set, and described gas source unit links to each other with the oil circuit entrance pipe of Buchholz relay by the gas flow measurement modular unit;
At the output terminal of gas source unit, a pressure transducer is set, be used for size and the variation of measured pressure value;
Adopt AD conversion unit and single machine unit that the operating mode of gas source unit, gas flow measurement modular unit and pressure transducer is detected and operation of recording value and time data;
Single-chip microcomputer is delivered to display unit with recorded data and is shown.
2. according to portable gas explosion relay on-site calibrator claimed in claim 1, it is characterized in that described single-chip microcomputer execution program of lower computer, carry out respectively calibration, flow rate detection, impermeability detection and communication task.
3. according to portable gas explosion relay on-site calibrator claimed in claim 1, it is characterized in that described gas flow measurement modular unit is by programmed control shut electromagnetic valve III and electromagnetic valve I V, open the air pump power supply, gas flow is crossed retaining valve and is pressurizeed to air-capacitor, and pressure measuring value feeds back to single-chip microcomputer by modular pressure I.When the force value that receives during than the large 10kPa of precompressed setting value, close the air pump power supply, regulate force value by electromagnetic valve I V and reach the precompressed setting value.Open electromagnetic valve I electromagnetic valve II and electromagnetic valve II I, pneumatic actuator travels forward.When opening electromagnetic valve II I, begin timing, stop timing during the topworks setting in motion.Single-chip microcomputer is passed to ARM to the state value of photosignal and time value.Topworks moves forward under the effect of gaseous tension.When switch contact 1 action, start clocking capability, when switch contact 2 action, close clocking capability.Single-chip microcomputer is passed to ARM to state value and the time value of switch contact 1 and switch contact 2.In the proal process of topworks, measure the force value of tested end by digital module II, and pressure data is uploaded in real time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105337652A CN103048614A (en) | 2012-12-11 | 2012-12-11 | Portable type gas relay scene calibrator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105337652A CN103048614A (en) | 2012-12-11 | 2012-12-11 | Portable type gas relay scene calibrator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103048614A true CN103048614A (en) | 2013-04-17 |
Family
ID=48061322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105337652A Pending CN103048614A (en) | 2012-12-11 | 2012-12-11 | Portable type gas relay scene calibrator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103048614A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103245909A (en) * | 2013-04-26 | 2013-08-14 | 国家电网公司 | Portable gas protection tester |
| CN104655372A (en) * | 2013-11-18 | 2015-05-27 | 苏州东南电碳科技有限公司 | Air tightness detection system for pantograph slide plate and detection method thereof |
| CN106248367A (en) * | 2016-09-12 | 2016-12-21 | 国家电网公司 | Loaded switch gas relay static state acting characteristic pilot system and test method |
| CN107356865A (en) * | 2016-05-09 | 2017-11-17 | 国网辽宁省电力有限公司营口供电公司 | A kind of Buchholz relay tester |
| CN109342936A (en) * | 2018-11-15 | 2019-02-15 | 中石化第十建设有限公司 | Two formula switch valve comprehensive calibrators of one kind and method of calibration |
| CN112504659A (en) * | 2020-10-28 | 2021-03-16 | 国网山东省电力公司青岛供电公司 | Transformer nitrogen-charging fire-extinguishing cut-off valve action threshold value checking system and method |
| CN113960469A (en) * | 2021-11-19 | 2022-01-21 | 国网四川省电力公司南充供电公司 | Novel high accuracy gas relay is rectified device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201145734Y (en) * | 2007-11-30 | 2008-11-05 | 上海市电力公司超高压输变电公司 | Gas-actuated relay calibration stand |
| KR20110041724A (en) * | 2009-10-16 | 2011-04-22 | 한전케이피에스 주식회사 | Test equipment for buchholz relay |
| 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 |
| CN202433498U (en) * | 2011-12-30 | 2012-09-12 | 华东电力试验研究院有限公司 | Fluid flow speed calibration device |
| CN202502219U (en) * | 2012-03-21 | 2012-10-24 | 上海市电力公司 | Calibration device for gas relay |
| CN202502221U (en) * | 2012-03-28 | 2012-10-24 | 上海市电力公司 | Device for measuring heavy gas flow speed of gas relay |
-
2012
- 2012-12-11 CN CN2012105337652A patent/CN103048614A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201145734Y (en) * | 2007-11-30 | 2008-11-05 | 上海市电力公司超高压输变电公司 | Gas-actuated relay calibration stand |
| KR20110041724A (en) * | 2009-10-16 | 2011-04-22 | 한전케이피에스 주식회사 | Test equipment for buchholz relay |
| 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 |
| CN202433498U (en) * | 2011-12-30 | 2012-09-12 | 华东电力试验研究院有限公司 | Fluid flow speed calibration device |
| CN202502219U (en) * | 2012-03-21 | 2012-10-24 | 上海市电力公司 | Calibration device for gas relay |
| CN202502221U (en) * | 2012-03-28 | 2012-10-24 | 上海市电力公司 | Device for measuring heavy gas flow speed of gas relay |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103245909A (en) * | 2013-04-26 | 2013-08-14 | 国家电网公司 | Portable gas protection tester |
| CN104655372A (en) * | 2013-11-18 | 2015-05-27 | 苏州东南电碳科技有限公司 | Air tightness detection system for pantograph slide plate and detection method thereof |
| CN104655372B (en) * | 2013-11-18 | 2018-06-01 | 苏州东南佳新材料股份有限公司 | Pantograph pan air tightness detection system and its detection method |
| CN107356865A (en) * | 2016-05-09 | 2017-11-17 | 国网辽宁省电力有限公司营口供电公司 | A kind of Buchholz relay tester |
| CN106248367A (en) * | 2016-09-12 | 2016-12-21 | 国家电网公司 | Loaded switch gas relay static state acting characteristic pilot system and test method |
| CN109342936A (en) * | 2018-11-15 | 2019-02-15 | 中石化第十建设有限公司 | Two formula switch valve comprehensive calibrators of one kind and method of calibration |
| CN112504659A (en) * | 2020-10-28 | 2021-03-16 | 国网山东省电力公司青岛供电公司 | Transformer nitrogen-charging fire-extinguishing cut-off valve action threshold value checking system and method |
| CN112504659B (en) * | 2020-10-28 | 2022-11-01 | 国网山东省电力公司青岛供电公司 | Transformer nitrogen-charging fire-extinguishing cut-off valve action threshold value checking system and method |
| CN113960469A (en) * | 2021-11-19 | 2022-01-21 | 国网四川省电力公司南充供电公司 | Novel high accuracy gas relay is rectified device |
| CN113960469B (en) * | 2021-11-19 | 2023-07-04 | 国网四川省电力公司南充供电公司 | High-precision gas relay correction device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103048614A (en) | Portable type gas relay scene calibrator | |
| CN102889906B (en) | Single-pipe gas relay detecting bench, centering clamping mechanism and detection method thereof | |
| CN201034763Y (en) | Gas-actuated relay calibration stand | |
| CN102563362A (en) | Compressed air system and intelligent pipe network leakage detecting method for same | |
| WO2021043039A1 (en) | Transformation method for gas density relay, and gas density relay having online self-check function and check method thereof | |
| CN202869615U (en) | Device for calibrating gas tightness of gas meters | |
| CN105021262A (en) | Gas flow calibration method with temperature pressure adjusting capacity | |
| CN201796123U (en) | Checking system of sulfur hexafluoride density relay | |
| CN105116363A (en) | Calibrating device for SF6 density relay checking instrument | |
| CN103791985A (en) | Static state standard cubic meter calibration device and calibration method of static state standard cubic meter calibration device | |
| CN110849768A (en) | Gas density relay with online check, check method and monitoring system | |
| CN110514995B (en) | Gas density relay with online self-checking function and checking method thereof | |
| CN203881412U (en) | Device for fast calibrating differential pressure type liquidometer on working condition site | |
| CN102455408A (en) | Gas relay calibration detection device and method | |
| CN202133515U (en) | Automatic positive pressure airtight detection apparatus | |
| WO2014161303A1 (en) | Check method and device for pressure release valve of transformer | |
| CN203672558U (en) | Pressure sensor testing device | |
| CN110441541A (en) | A kind of expansion power generator revolving speed static test system and test method | |
| CN203224329U (en) | Quick calibrator used for pressure relief valve | |
| CN204694455U (en) | Based on the inflatable corrugated tube fatigue tester automaton of PLC | |
| CN204964739U (en) | SF6 density relay check gauge calibrating installation | |
| CN104197998B (en) | Low pressure loss leakage detecting type differential pressure type flow detector and scaling method and measuring method | |
| CN202836631U (en) | Single-pipe buchholz relay detecting platform and centring clamping mechanism special for buchholz relay detection | |
| CN203455146U (en) | Automatic airtight detection machine for people's air defense equipment | |
| CN202676412U (en) | Shut-off valve leakage rate on-line detection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130417 |