CN102169113A - 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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- CN102169113A CN102169113A CN201110021839XA CN201110021839A CN102169113A CN 102169113 A CN102169113 A CN 102169113A CN 201110021839X A CN201110021839X A CN 201110021839XA CN 201110021839 A CN201110021839 A CN 201110021839A CN 102169113 A CN102169113 A CN 102169113A
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- G—PHYSICS
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- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0006—Calibrating gas analysers
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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 the high-voltage electrical equipment.The size of sulfur hexafluoride gas humidity directly influences its insulating property.Online accurate measurement sulfur hexafluoride gas humidity plays crucial effects to the safety that guarantees the inflation electric equipment.But all under normal pressure, carry out in the comparison and the verification of widely used sulfur hexafluoride humidity sensor on transformer station and the circuit at present, can not guarantee the accuracy of measurement under the duty.Simultaneously, because the reasons in structure of humidity measuring instrument can not guarantee that sensor institute detected gas is consistent with standard gas 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 the 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 communication valve and vent valve and exhaust flow-meter on the gas exhaust duct in ebullator storehouse in turn, 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, and 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 the removable vehicle frame.
Another object of the present invention provides 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's drying:
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 from gas admittance valve and indicate 1.2 MPa; By opening communication valve and vent valve pressure release, close gas admittance valve to 0.12MPa; So operation is three times, closes the vacuum pump gas admittance valve after finishing system's drying.
B) static distribution:
By calculating, from gas admittance valve quantitatively inject water vapor and drying nitrogen to jar in gas reach required pressure;
C) calibration:
Gas circulation was opened communication valve and vent valve after 5 minutes in the system, after 2 minutes, detected 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, verification storehouse and ebullator storehouse pressure are discharged, dismantle verification storehouse interface, connect by the verification humidity sensor from vent valve;
Open the verification admission valve, cleaned verification storehouse and ebullator storehouse 5 minutes, open outlet valve, close communication valve and vent valve, circulated 2 minutes with 0.5L/min speed;
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 the gas tank by drying nitrogen, repeat calibration and checking procedure, finish the verification of different humidity;
More repeat above process behind the emat sensor; Above-mentioned negative pressure is an actual pressure, and malleation is a gauge pressure.
Dispose the gas of certain humidity, fully circulation makes whole device moisture stable in comparison device.With after the 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 gas 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, add dry gas again and regulate moisture in the gas tank, and make the interior gaseous tension of gas tank be higher than sulfur hexafluoride gas humidity sensor working pressure.As benchmark, on-line equipment is carried out verification with the accurate humidity of measuring of standard method.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 different humidity standard gas, examine or check the accuracy of online humidity measuring instrument.This device mainly is made up of gas tank, vacuum pump, gas-circulating system, control pressurer system, pressure regulating system, sampling and stock layout system.
Whole device is installed on the reliable removable vehicle frame to have maneuverability.
Principle of work of the present invention:
The vacuum tightness of gas tank being carried out dry back and needing keeping at first with vacuumizing method and dry gas ablution.According to the high humility of gaseous tension, setting in gas tank volume, environment temperature and the predefined gas tank, quantitative perfusion certain volume saturated gas and dry gas in gas tank.Connect the total system pipeline, start circulating device, make in the total system internal gas space all gas humidity even.With gravimetric method or accurate dew point method measurement gas humidity, finish calibration, obtain standard gas.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, external system is thoroughly cleaned, again the total system recyclegas with standard gas.So go round and begin again the stability of moisture measurement when finishing 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 the reliability of raising on-line equipment Monitoring Data under the duty.
2, static preparation standard gas: static preparation standard gas is calibrated with standard method, overcomes the fluctuation of dynamic air-distributing humidity, and the factor that influences humidity is reduced.
3, standard air humidity degree is stable: high-pressure sealed system overcomes the contingent standard air humidity degree variation because of the psychrometric difference of surrounding air and standard gas under normal pressure.Standard air humidity degree is stable, satisfies whole verification needs.
4, standard is large-minded: can a large amount of standard gas of disposable preparation, many on-line equipments are carried out verification.
5, easy to operate: as after gas tank vacuumized, to be easy to gas tank is carried out drying.Utilize vacuum, make things convenient for high humidity gas to inject gas tank and the standard of adjustment air humidity degree.
6, important technological parameters and performance index:
Circular flow the: 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 communication valve 7 and vent valve 8 and exhaust flow-meter 14 on the gas exhaust duct in ebullator storehouse in turn, 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 the ebullator storehouse 4, ebullator storehouse 4 is provided with circulating pressure table 11, and 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 the removable vehicle frame.
Referring to Fig. 2, Fig. 3, Fig. 4, whole equipment is placed on the 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's drying:
B) static distribution:
By calculating, quantitatively inject water vapor and drying nitrogen to jar interior gas from gas admittance valve 16 and reach required pressure;
C) calibration:
Gas circulation was opened communication valve 7 and vent valve 8 after 5 minutes in the system, after 2 minutes, detected 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, verification storehouse and ebullator storehouse pressure are discharged, dismantle verification storehouse interface, connect by the verification humidity sensor from vent valve 8;
Open verification admission valve 5, cleaned verification storehouse and ebullator storehouse 5 minutes, open outlet valve 6, close communication valve 7 and vent valve 8, circulated 2 minutes with 0.5L/min speed;
Adjust gas humidity in the gas tank by drying nitrogen, repeat calibration and checking procedure, finish the verification of different humidity;
More repeat above process behind the emat sensor;
Above-mentioned negative pressure is an actual pressure, and malleation is a 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 communication valve (7) and vent valve (8) and exhaust flow-meter (14) on the gas exhaust duct in ebullator storehouse in turn, 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 the ebullator storehouse (4), ebullator storehouse (4) is provided with circulating pressure table (11), and verification storehouse (3) are 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 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 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 the 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's drying:
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, close gas admittance valve (16) to 0.12MPa; So operation is three times, closes vacuum pump gas admittance valve (9) after finishing system's drying;
B) static distribution:
By calculating, from gas admittance valve (16) quantitatively inject water vapor and drying nitrogen to jar in gas reach required pressure;
C) calibration:
Gas circulation was opened communication valve (7) and vent valve (8) after 5 minutes in the system, after 2 minutes, detected 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), verification storehouse and ebullator storehouse pressure are discharged, dismantle verification storehouse interface, connect by the verification humidity sensor from vent valve (8);
Open verification admission valve (5), cleaned verification storehouse and ebullator storehouse 5 minutes, open outlet valve (6), close communication valve (7) and vent valve (8), circulated 2 minutes with 0.5L/min speed;
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 the gas tank by drying nitrogen, repeat calibration and checking procedure, finish the verification of different humidity;
More repeat above process behind the emat sensor;
Above-mentioned negative pressure is an actual pressure, and malleation is a 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 |
| PCT/CN2011/001589 WO2012097488A1 (en) | 2011-01-19 | 2011-09-19 | Calibration device for on-line sulfur hexafluoride humidity meters and calibration method therefor |
| DE212011100059U DE212011100059U1 (en) | 2011-01-19 | 2011-09-19 | Calibration device for online sulfur hexafluoride moisture analyzers |
| DE112011100765T DE112011100765B4 (en) | 2011-01-19 | 2011-09-19 | Calibration device for online sulfur hexafluoride moisture analyzers and associated calibration method |
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 true CN102169113A (en) | 2011-08-31 |
| CN102169113B 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) |
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| WO2012097488A1 (en) * | 2011-01-19 | 2012-07-26 | 四川电力科学研究院 | Calibration device for on-line sulfur hexafluoride humidity meters and calibration method therefor |
| CN102809630A (en) * | 2012-07-20 | 2012-12-05 | 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 |
| CN104061955A (en) * | 2014-07-15 | 2014-09-24 | 国家电网公司 | Verification platform for sulfur hexafluoride gas humidity sensor under pressure |
| CN104076127A (en) * | 2014-07-15 | 2014-10-01 | 国家电网公司 | Device for testing accuracy of sulfur hexafluoride humidity sensor |
| CN104792943A (en) * | 2015-05-05 | 2015-07-22 | 西安近代化学研究所 | Gas field testing device |
| 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 |
| WO2016008273A1 (en) * | 2014-07-15 | 2016-01-21 | 国家电网公司 | Checking platform for sulfur hexafluoride gas humidity sensor under pressure |
| CN105758990A (en) * | 2014-12-17 | 2016-07-13 | 国家电网公司 | Calibration system used for SF6 gas micro-water content detector in GIS |
| CN106512671A (en) * | 2016-11-24 | 2017-03-22 | 黑龙江省电力科学研究院 | Electrified on-line dehumidifying and purifying system of sulfur hexafluoride electric equipment |
| CN114005559A (en) * | 2021-10-28 | 2022-02-01 | 华能核能技术研究院有限公司 | Online calibration system and method for primary loop humidity instrument of high-temperature gas cooled reactor |
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Also Published As
| Publication number | Publication date |
|---|---|
| DE112011100765B4 (en) | 2013-06-20 |
| CN102169113B (en) | 2013-06-05 |
| DE212011100059U1 (en) | 2012-11-13 |
| DE112011100765T5 (en) | 2012-12-06 |
| WO2012097488A1 (en) | 2012-07-26 |
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