CN102169113B - Verifying device and method for online sulfur hexafluoride hygrometer - Google Patents
Verifying device and method for online sulfur hexafluoride hygrometer Download PDFInfo
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Abstract
The invention discloses a verifying device and method for an online sulfur hexafluoride hygrometer. An air tank is connected with a verifying cabin through an air outlet pipeline; the air outlet pipeline is provided with a verifying inlet valve; the verifying cabin is connected with a circulating pump cabin through a pipeline; an exhaust pipeline of the circulating pump cabin is provided with a connecting valve, an exhaust valve and an exhaust flow meter in sequence; an outlet pipeline of the circulating pump cabin is connected with the air tank and is provided with an outlet valve; a diaphragm pump is arranged in the circulating pump cabin; the circulating pump cabin is provided with a circulating pressure gauge; the verifying cabin is provided with an interface for connecting a verified humidity sensor; the air tank is provided with a pressure gauge and an air inlet pipe; the air inlet pipe is provided with an air inlet valve; a vacuum pump is connected with the air tank through a vacuumizing pipeline; and the vacuumizing pipeline is provided with a vacuum pump air inlet valve. By adopting the device, the online sulfur hexafluoride hygrometer can be compared and measured under the conditions of different gas pressures and different temperatures, and the accuracy of the online hygrometer can be remarkably enhanced.
Description
Technical field
The present invention relates to calibration equipment, the particularly calibration equipment of the online hygronom of sulfur hexafluoride that hygronom detects.
Background technology
Sulfur hexafluoride is insulating gas and the arc extinguishing gases in high-voltage electrical equipment.The size of sulfur hexafluoride gas humidity directly affects its insulating property.Online Measurement accuracy sulfur hexafluoride gas humidity plays vital effect to the safety that guarantees the inflation electric equipment.But all carry out under normal pressure in comparison and the verification of widely used sulfur hexafluoride humidity sensor on transformer station and circuit at present, can not guarantee the accuracy of measurement under duty.Simultaneously, because the reasons in structure of humidity measuring instrument can not guarantee that gas that sensor detects is consistent with Standard Gases when comparing with verification.
Summary of the invention
The purpose of this invention is to provide the online hygronom calibration equipment of a kind of sulfur hexafluoride, to realize that online hygronom is operated in comparison and check under gas with various pressure and different humidity condition.
the object of the present invention is achieved like this: the online hygronom calibration equipment of a kind of sulfur hexafluoride, gas tank is connected with the verification storehouse through outlet pipe, this outlet pipe is provided with the verification admission valve, the verification storehouse is connected with the ebullator storehouse through pipeline, be provided with in turn communication valve and vent valve and exhaust flow-meter on the gas exhaust duct in ebullator storehouse, the outlet conduit in ebullator storehouse is connected with gas tank, this outlet conduit is provided with outlet valve, membrane pump is arranged in the ebullator storehouse, the ebullator storehouse is provided with the circulating pressure table, the verification storehouse is provided with connecting by the interface of verification humidity sensor, gas tank is provided with tensimeter, and gas tank is provided with draft tube, and draft tube is provided with gas admittance valve, vacuum pump is connected with gas tank through vacuum-pumping pipeline, and vacuum-pumping pipeline is provided with the vacuum pump gas admittance valve.
Above-mentioned gas tank is provided with safety valve.
Above-mentioned tensimeter and circulating pressure table are vacuum malleation dual-purpose type tensimeter; Gas tank, vacuum pump, verification storehouse and ebullator storehouse are installed on removable vehicle frame.
Another object of the present invention is to provide the method for calibration of said apparatus.
Another object of the present invention is achieved in that the method for calibration of the online hygronom calibration equipment of a kind of sulfur hexafluoride, carries out according to the following steps:
A) system is dry:
Close communication valve, vent valve, gas admittance valve, open verification admission valve, outlet valve and vacuum pump gas admittance valve, start membrane pump and vacuum pump, be pumped to circulating pressure table and tensimeter indication-0.08MPa, stop vacuum pump, close the vacuum pump gas admittance valve, inject drying nitrogen to circulating pressure table and tensimeter indication 1.2 MPa from gas admittance valve; By opening communication valve and vent valve pressure release to 0.12MPa, close gas admittance valve; So operation is three times, closes the vacuum pump gas admittance valve after the completion system drying.
B) static distribution:
By calculating, enter water vapor and drying nitrogen gas to the tank from the gas admittance valve quantitative pouring and reach required pressure;
C) calibration:
In system, gas circulation after 5 minutes, is opened communication valve and vent valve, after 2 minutes, detects gas tank in gas moisture from exhaust flow-meter outlet sampling with the venting of 0.2L/min speed;
D) verification:
Close verification admission valve, outlet valve, open communication valve, make verification storehouse and ebullator storehouse earth pressure release from vent valve, dismantle verification storehouse interface, connect by the verification humidity sensor;
Open the verification admission valve, cleaned verification storehouse and ebullator storehouse 5 minutes with 0.5L/min speed, open outlet valve, close communication valve and vent valve, circulated 2 minutes;
Open communication valve, close verification admission valve and outlet valve, open vent valve and make verification storehouse and ebullator storehouse pressure reduce to the humidity sensor working pressure, verification humidity sensor, pressure carry out from high to low with the force verification of humidity sensor multiple pressure;
Adjust gas humidity in gas tank by drying nitrogen, repeat calibration and checking procedure, complete the verification of different humidity;
More repeat above process after emat sensor; Above-mentioned negative pressure is actual pressure, and malleation is gauge pressure.
Configure the gas of certain humidity, fully circulation, make whole device moisture stable in comparison device.With after standard humidity measuring method calibration, the comparison that online humidity measuring instrument is carried out.This device can realize online humidity measuring instrument is operated in the comparison of gas with various pressure and different humidity, significantly improves the accuracy of online humidity measuring instrument
The present invention carries out scene (laboratory) simulation to sulfur hexafluoride gas sample, contains the Standard Gases sample of stablizing moisture with formation.
Specific implementation process of the present invention is as follows: add a certain amount of moisture gas in gas tank, then add dry gas to regulate moisture in gas tank, and make the interior gaseous tension of gas tank higher than sulfur hexafluoride gas humidity sensor working pressure.As benchmark, on-line equipment is carried out verification with the humidity of standard method Measurement accuracy.Change the humidity sensor working pressure, online humidity measuring instrument is measured under different pressures same humidity gas, examines or check the adaptability that online humidity measuring instrument changes pressure in the actual motion environment.Adopt the different humidity Standard Gases, the accuracy of the online humidity measuring instrument of examination.This device mainly is comprised of gas tank, vacuum pump, gas-circulating system, control pressurer system, pressure regulating system, sampling and Layout System.
Whole device is arranged on reliable removable vehicle frame to have maneuverability.
Principle of work of the present invention:
At first with vacuumizing method and dry gas ablution, gas tank is carried out the vacuum tightness that dry rear also maintenance needs.According to the high humility of gaseous tension, setting in gas tank volume, environment temperature and predefined gas tank, quantitative perfusion certain volume saturated gas and dry gas in the gas tank.Connect the whole system pipeline, start circulating device, make in the whole system internal gas space all gas humidity even.With gravimetric method or accurate dew point method measurement gas humidity, complete calibration, obtain Standard Gases.Close gas tank import export pipe valve, adjust the humidity sensor working pressure, online humidity measuring instrument is measured under different pressures same humidity gas, examines or check the adaptability that online humidity measuring instrument changes pressure.After changing online humidity measuring instrument, with Standard Gases, external system is thoroughly cleaned, then the total system recyclegas.So go round and begin again, the stability of moisture measurement when completing many online humidity measuring instruments pressure changing in simulation actual motion environment.Repeat said process after changing gas humidity, examine or check the accuracy that online humidity measuring instrument is measured different humidity.
The present invention has following performance characteristics and advantage:
1, simulation sulfur hexafluoride sensor work on the spot environment: with elevated pressures contain humid gas verification sulfur hexafluoride humidity on-line equipment, make verification near carrying out under duty, the reliability of raising on-line equipment Monitoring Data.
2, static preparation Standard Gases: static preparation Standard Gases is calibrated with standard method, overcomes the fluctuation of dynamic air-distributing humidity, and the factor that affects humidity is reduced.
3, Standard Gases moisture stable: high-pressure sealed system overcomes the contingent Standard Gases humidity variation because of the psychrometric difference of surrounding air and Standard Gases under normal pressure.The Standard Gases moisture stable satisfies whole verification needs.
4, standard is large-minded: can a large amount of Standard Gases of disposable preparation, many on-line equipments are carried out verification.
5, easy to operate: as after gas tank is vacuumized, to be easy to gas tank is carried out drying.Utilize vacuum, facilitate high humidity gas inject gas tank and adjust Standard Gases humidity.
6, important technological parameters and performance index:
Circular flow: under 〉=300L/h(gas tank pressure);
Gas-storing capacity: 20L(1.2MPa);
Working pressure (gauge pressure): 0 MPa～0.8MPa;
Operating noise :≤45dB(A);
Physical dimension: 800 * 750 * 450mm.
Description of drawings
Fig. 1 is the system process apparatus sketch of this device.
Fig. 2 is the arrangenent diagram of process equipment shown in Figure 1.
Fig. 3, Fig. 4 are respectively left view and the vertical views of Fig. 2.
Embodiment
Fig. 1 illustrates, the online hygronom calibration equipment of a kind of sulfur hexafluoride, gas tank 1 is connected with verification storehouse 3 through outlet pipe, this outlet pipe is provided with verification admission valve 5, the verification storehouse is connected with ebullator storehouse 4 through pipeline, be provided with in turn communication valve 7 and vent valve 8 and exhaust flow-meter 14 on the gas exhaust duct in ebullator storehouse, the outlet conduit in ebullator storehouse is connected with gas tank 1, this outlet conduit is provided with outlet valve 6, membrane pump 13 is arranged in ebullator storehouse 4, ebullator storehouse 4 is provided with circulating pressure table 11, verification storehouse 3 is provided with connecting by the interface 12 of verification humidity sensor, gas tank 1 is provided with tensimeter 15, and gas tank 1 is provided with draft tube, and draft tube is provided with gas admittance valve 16, vacuum pump is connected with gas tank 1 through vacuum-pumping pipeline, and vacuum-pumping pipeline is provided with vacuum pump gas admittance valve 9.Gas tank 1 is provided with safety valve 10.Tensimeter 15 and circulating pressure table 11 are vacuum malleation dual-purpose type tensimeter; Described gas tank 1, vacuum pump 2, verification storehouse 3 and ebullator storehouse 4 are installed on removable vehicle frame.
Referring to Fig. 2, Fig. 3, Fig. 4, whole equipment is placed on removable vehicle frame, and the length of vehicle frame * wide is 810 * 710mm(Fig. 4), height 900mm(Fig. 2).
The method of calibration of the online hygronom calibration equipment of a kind of sulfur hexafluoride, carry out according to the following steps:
A) system is dry:
B) static distribution:
By calculating, enter water vapor and drying nitrogen gas to the tank from gas admittance valve 16 quantitative pourings and reach required pressure;
C) calibration:
In system, gas circulation after 5 minutes, is opened communication valve 7 and vent valve 8, after 2 minutes, detects gas tank in gas moisture from exhaust flow-meter 14 outlet samplings with the venting of 0.2L/min speed;
D) verification:
Close verification admission valve 5, outlet valve 6, open communication valve 7, make verification storehouse and ebullator storehouse earth pressure release from vent valve 8, dismantle verification storehouse interface, connect by the verification humidity sensor;
Open verification admission valve 5, cleaned verification storehouse and ebullator storehouse 5 minutes with 0.5L/min speed, open outlet valve 6, close communication valve 7 and vent valve 8, circulated 2 minutes;
Adjust gas humidity in gas tank by drying nitrogen, repeat calibration and checking procedure, complete the verification of different humidity;
More repeat above process after emat sensor;
Above-mentioned negative pressure is actual pressure, and malleation is gauge pressure.
Claims (4)
1. online hygronom calibration equipment of sulfur hexafluoride, it is characterized in that: gas tank (1) is connected with verification storehouse (3) through outlet pipe, this outlet pipe is provided with verification admission valve (5), the verification storehouse is connected with ebullator storehouse (4) through pipeline, be provided with in turn communication valve (7) and vent valve (8) and exhaust flow-meter (14) on the gas exhaust duct in ebullator storehouse, the outlet conduit in ebullator storehouse is connected with gas tank (1), this outlet conduit is provided with outlet valve (6), membrane pump (13) is arranged in ebullator storehouse (4), ebullator storehouse (4) is provided with circulating pressure table (11), verification storehouse (3) is provided with connecting by the interface of verification humidity sensor (12), gas tank (1) is provided with tensimeter (15), and gas tank (1) is provided with draft tube, and draft tube is provided with gas admittance valve (16), vacuum pump is connected with gas tank (1) through vacuum-pumping pipeline, and vacuum-pumping pipeline is provided with vacuum pump gas admittance valve (9).
2. the online hygronom calibration equipment of sulfur hexafluoride according to claim 1, it is characterized in that: described gas tank (1) is provided with safety valve (10).
3. the online hygronom calibration equipment of sulfur hexafluoride according to claim 1 and 2, it is characterized in that: described tensimeter (15) and circulating pressure table (11) are vacuum malleation dual-purpose type tensimeter; Described gas tank (1), vacuum pump (2), verification storehouse (3) and ebullator storehouse (4) are installed on removable vehicle frame.
4. the method for calibration of the online hygronom calibration equipment of sulfur hexafluoride as claimed in claim 1 is characterized in that: carry out according to the following steps:
A) system is dry:
Close communication valve (7), vent valve (8), gas admittance valve (16), open verification admission valve (5), outlet valve (6) and vacuum pump gas admittance valve (9), start membrane pump (13) and vacuum pump (2), be pumped to circulating pressure table (11) and tensimeter (15) indication-0.08MPa, stop vacuum pump, close vacuum pump gas admittance valve (9), inject drying nitrogen to circulating pressure table (11) and tensimeter (15) indication 1.2 MPa from gas admittance valve (16); By opening communication valve (7) and vent valve (8) pressure release to 0.12MPa, close gas admittance valve (16); So operation is three times, closes vacuum pump gas admittance valve (9) after the completion system drying;
B) static distribution:
By calculating, enter water vapor and drying nitrogen gas to the tank from gas admittance valve (16) quantitative pouring and reach required pressure;
C) calibration:
In system, gas circulation after 5 minutes, is opened communication valve (7) and vent valve (8), after 2 minutes, detects gas tank in gas moisture from exhaust flow-meter (14) outlet sampling with the venting of 0.2L/min speed;
D) verification:
Close verification admission valve (5), outlet valve (6), open communication valve (7), make verification storehouse and ebullator storehouse earth pressure release from vent valve (8), dismantle verification storehouse interface, connect by the verification humidity sensor;
Open verification admission valve (5), cleaned verification storehouse and ebullator storehouse 5 minutes with 0.5L/min speed, open outlet valve (6), close communication valve (7) and vent valve (8), circulated 2 minutes;
Open communication valve (7), close verification admission valve (5) and outlet valve (6), open vent valve (8) and make verification storehouse and ebullator storehouse pressure reduce to the humidity sensor working pressure, the verification humidity sensor, pressure carries out from high to low with the force verification of humidity sensor multiple pressure;
Adjust gas humidity in gas tank by drying nitrogen, repeat calibration and checking procedure, complete the verification of different humidity;
More repeat above process after emat sensor;
Above-mentioned negative pressure is actual pressure, and malleation is gauge pressure.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110021839 CN102169113B (en) | 2011-01-19 | 2011-01-19 | Verifying device and method for online sulfur hexafluoride hygrometer |
| DE112011100765T DE112011100765B4 (en) | 2011-01-19 | 2011-09-19 | Calibration device for online sulfur hexafluoride moisture analyzers and associated calibration method |
| DE212011100059U DE212011100059U1 (en) | 2011-01-19 | 2011-09-19 | Calibration device for online sulfur hexafluoride moisture analyzers |
| PCT/CN2011/001589 WO2012097488A1 (en) | 2011-01-19 | 2011-09-19 | Calibration device for on-line sulfur hexafluoride humidity meters and calibration method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110021839 CN102169113B (en) | 2011-01-19 | 2011-01-19 | Verifying device and method for online sulfur hexafluoride hygrometer |
Publications (2)
| Publication Number | Publication Date |
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| CN102169113A CN102169113A (en) | 2011-08-31 |
| CN102169113B true CN102169113B (en) | 2013-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110021839 Active CN102169113B (en) | 2011-01-19 | 2011-01-19 | Verifying device and method for online sulfur hexafluoride hygrometer |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN102169113B (en) |
| DE (2) | DE112011100765B4 (en) |
| WO (1) | WO2012097488A1 (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102169113B (en) * | 2011-01-19 | 2013-06-05 | 四川电力科学研究院 | Verifying device and method for online sulfur hexafluoride hygrometer |
| CN102809630B (en) * | 2012-07-20 | 2015-05-27 | 河南平高电气股份有限公司 | Micro-water transmitter |
| CN103481922A (en) * | 2013-09-02 | 2014-01-01 | 国家电网公司 | Gas comprehensive analysis testing platform car |
| CN104698372A (en) * | 2013-12-04 | 2015-06-10 | 上海乐研电气科技有限公司 | SF6 or mixed gas-containing density relay calibration device |
| CN104076127B (en) * | 2014-07-15 | 2015-09-30 | 国家电网公司 | A kind of sulfur hexafluoride humidity sensor accuracy pick-up unit |
| CN104061955B (en) * | 2014-07-15 | 2016-10-19 | 国家电网公司 | A kind of verification platform of band pressure sulfur hexafluoride gas humidity sensor |
| WO2016008273A1 (en) * | 2014-07-15 | 2016-01-21 | 国家电网公司 | Checking platform for sulfur hexafluoride gas humidity sensor under pressure |
| CN105758990B (en) * | 2014-12-17 | 2018-01-19 | 国家电网公司 | A kind of calibration system for being used for SF6 gas micro water content detectors in GIS |
| CN104792943B (en) * | 2015-05-05 | 2017-03-01 | 西安近代化学研究所 | A kind of gas on-site testing device sealing rigid container for screw plug |
| CN105021674A (en) * | 2015-07-28 | 2015-11-04 | 国网四川省电力公司电力科学研究院 | Verification method of gas humidity detector |
| CN106512671B (en) * | 2016-11-24 | 2022-11-04 | 黑龙江省电力科学研究院 | Electrified online dehumidification and purification system for sulfur hexafluoride electrical equipment |
| CN106841524B (en) * | 2017-01-20 | 2019-03-12 | 山东省科学院自动化研究所 | A kind of intelligence toxic gas detector experimental rig and method |
| CN110296952A (en) * | 2019-08-02 | 2019-10-01 | 中国矿业大学(北京) | A kind of gas sensor calibration device and scaling method |
| CN110954652B (en) * | 2019-10-28 | 2023-05-09 | 国网河北省电力有限公司电力科学研究院 | Verification device and verification method |
| CN111458464A (en) * | 2020-06-05 | 2020-07-28 | 国网青海省电力公司海东供电公司 | SF for sulfur hexafluoride6Integrated pipeline device for gas test and test method |
| CN114005559B (en) * | 2021-10-28 | 2023-08-15 | 华能核能技术研究院有限公司 | Online checking system and method for high-temperature gas cooled reactor primary loop hygrometer |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2012097488A1 (en) | 2012-07-26 |
| CN102169113A (en) | 2011-08-31 |
| DE112011100765B4 (en) | 2013-06-20 |
| DE212011100059U1 (en) | 2012-11-13 |
| DE112011100765T5 (en) | 2012-12-06 |
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| CB03 | Change of inventor or designer information |
Inventor after: Tang Ping Inventor after: Su Changhua Inventor after: Wang Jie Inventor after: Hu Shihong Inventor after: Wu Yang Inventor before: Tang Ping Inventor before: Su Changhua Inventor before: Wang Jie Inventor before: Hu Shihong |
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| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: TANG PING SU CHANGHUA WANG KAI HU SHIHONG WANG JIE TO: TANG PING SU CHANGHUA WANG KAI HU SHIHONG WANG JIE WU YANG |
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| CP03 | Change of name, title or address |
Address after: 610072 No. 24, Qinghua Road, Qingyang District, Chengdu, Sichuan, China Patentee after: STATE GRID SICHUAN ELECTRIC POWER Research Institute Patentee after: State Grid Corporation of China Address before: 610071 No. 24, Qinghua Road, Qingyang District, Chengdu, Sichuan, China Patentee before: Sichuan Electric power Research Institute Patentee before: State Grid Corporation of China |
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| TR01 | Transfer of patent right |
Effective date of registration: 20141204 Address after: 610072 No. 24, Qinghua Road, Qingyang District, Chengdu, Sichuan, China Patentee after: STATE GRID SICHUAN ELECTRIC POWER Research Institute Patentee after: State Grid Corporation of China Patentee after: ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID NINGXIA ELECTRIC POWER Co. Address before: 610072 No. 24, Qinghua Road, Qingyang District, Chengdu, Sichuan, China Patentee before: STATE GRID SICHUAN ELECTRIC POWER Research Institute Patentee before: State Grid Corporation of China |