CN104089978A - Built-in detection system for sulfur hexafluoride gas humidity - Google Patents

Built-in detection system for sulfur hexafluoride gas humidity Download PDF

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Publication number
CN104089978A
CN104089978A CN201410335159.9A CN201410335159A CN104089978A CN 104089978 A CN104089978 A CN 104089978A CN 201410335159 A CN201410335159 A CN 201410335159A CN 104089978 A CN104089978 A CN 104089978A
Authority
CN
China
Prior art keywords
sulfur hexafluoride
tank
humidity
mirror
gas
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
Application number
CN201410335159.9A
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Chinese (zh)
Inventor
祁炯
苏镇西
赵跃
宋玉梅
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
Anhui Electric Power Research Intstitute of State Grid Anhui Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
Anhui Electric Power Research Intstitute of State Grid Anhui Electric Power Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by State Grid Corp of China SGCC, Anhui Electric Power Research Intstitute of State Grid Anhui Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201410335159.9A priority Critical patent/CN104089978A/en
Publication of CN104089978A publication Critical patent/CN104089978A/en
Pending legal-status Critical Current

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Abstract

The invention provides a built-in detection system for sulfur hexafluoride gas humidity. The system is characterized by comprising a tank body, a mirror type sulfur hexafluoride humidity density sensor, a motor, a magnetic coupling and a fan which is arranged in the tank body, wherein a safety valve, a pressure gauge, a vacuum meter, an air inlet, an air outlet and an adapter for installing the sulfur hexafluoride humidity sensor to be detected are arranged on the tank body; the mirror type sulfur hexafluoride humidity density sensor is arranged on the inner wall of the tank body; the air outlet is connected with a dew-point meter through a valve; the magnetic coupling is embedded into the tank body, an outer rotor of the magnetic coupling is connected with an output shaft of the motor, and an inner rotor of the magnetic coupling is fixedly connected with the fan. The mirror type built-in sulfur hexafluoride sensor adopts the cold mirror principle; when the temperature of a mirror is low enough, moisture in the gas is condensed to be dew on the mirror, the temperature of the dew condensed from the moisture in the gas on the mirror is directly measured, the temperature at the moment is a dew point, and the measurement is not affected by pressure in a container, so that the measurement is more accurate, and the reproducibility is good.

Description

A kind of built in test system of sulfur hexafluoride gas humidity
Technical field
The invention provides a kind of built in test system of sulfur hexafluoride gas humidity, belong to sulfur hexafluoride gas Humidity Detection instrument technology.
Background technology
SF 6gas, owing to having good insulation characterisitic and arc quenching characteristic, is used widely in high voltage electric equipment.Due to SF 6gas is manufactured the factors such as link, electrical equipment manufacture and installation process, equipment leakage, adsorbent, causes SF 6in gas, moisture increases, thereby insulant inside surface generation arcing fault probability is increased; Isolating switch, owing to making moist or producing condensation, makes its decreasing insulating; SF 6in gas, moisture can participate in SF 6the decomposition reaction of gas, generates the extremely strong decomposition product of corrosivity, and then the interior metal original paper of corrosion electrical equipment and sealed insulating material, shortens the serviceable life of electrical equipment.
Along with the development of domestic intelligent grid, in a large amount of electrical equipments, SF is installed at present 6gas humidity device for detecting density, this type of monitoring device major part is the monitoring device of external, measuring accuracy is relatively low, and the impact that is vulnerable to pressure causes measurement accuracy to reduce.
Summary of the invention
The object of this invention is to provide that a kind of measuring accuracy is high, the built in test system of a kind of sulfur hexafluoride gas humidity of excellent working performance.Its technical scheme is:
A kind of built in test system of sulfur hexafluoride gas humidity, it is characterized in that: comprise tank body, mirror surface type sulfur hexafluoride humidity and compactibility sensor, motor, magnetic shaft coupling and be arranged on the fan in tank body, wherein tank body is provided with safety valve, tensimeter, vacuum meter, air intake opening, gas outlet and for the adapter of sulfur hexafluoride humidity sensor to be detected is installed, mirror surface type sulfur hexafluoride humidity and compactibility installation of sensors is in inner tank wall, gas outlet connects dew point hygrometer through valve, magnetic shaft coupling is inlaid on tank body, the outer rotor of magnetic shaft coupling is connected with the output shaft of motor, internal rotor is fixedly connected with fan.
The built in test system of described a kind of sulfur hexafluoride gas humidity, the interface that sulfur hexafluoride humidity sensor to be detected is installed is 2-4.
The built in test system of described a kind of sulfur hexafluoride gas humidity, the link of adapter and tank body is provided with external thread, both are threaded through sealing gasket, and the link of adapter and sulfur hexafluoride humidity sensor to be detected is provided with internal thread, and both are threaded by sealed tube.
Its principle of work is: first sulfur hexafluoride humidity sensor to be detected is installed on tank body through adapter.When detection, first by the nitrogen that is filled with certain humidity in tank body to set pressure, unlatching electric motor fan rotates, make nitrogen humidity equilibrium in tank body, humidity and the density of reading nitrogen in tank body by mirror surface type sulfur hexafluoride humidity and compactibility sensor, then analyze the output valve of sulfur hexafluoride humidity sensor to be detected, and contrast with the humidity of reading and density, to judge the accuracy of sulfur hexafluoride humidity sensor to be detected.
Compared with prior art, its advantage is in the present invention:
1, the present invention has higher accuracy in detection.Existing external sensor, in the time measuring in container high humility gas, need be decreased to gas in container pressure under normal pressure and measure, and the gas of larger humidity has moisture and separates out in decompression process, causes measuring inaccurate; And the built-in sulfur hexafluoride sensor of mirror surface type is to adopt Cold Mirrors principle, in the time that mirror temperature is enough low, the moisture in gas is condensed into dew on minute surface, temperature is now dew point, get final product direct mensurated gas composition dew point value, and the not impact of receptor internal pressure, it is more accurate therefore to measure.
2, the built-in sulfur hexafluoride sensor of mirror surface type has better measurement reappearance and stability.Existing resistance-capacitance type sensor is based on Al 2o 3, the resistance capacitance that occurs in the medium such as silicon semiconductor and gas contact process quantitatively changes, and measures, there is performance degradation in this type of medium, cause measuring repeated variation after long-term use; And the built-in sulfur hexafluoride sensor of mirror surface type adopts Cold Mirrors principle, directly the moisture in mensurated gas composition is condensed into the temperature of dew on minute surface, and temperature is now dew point, and this method is measured has the features such as accuracy is high, favorable reproducibility.
Brief description of the drawings
Fig. 1 is the structural representation of the embodiment of the present invention.
In figure: 1, tank body 2, mirror surface type sulfur hexafluoride humidity and compactibility sensor 3, motor 4, magnetic shaft coupling 5, fan 6, safety valve 7, tensimeter 8, vacuum meter 9, air intake opening 10, gas outlet 11, adapter 12, valve 13, dew point hygrometer 14, O-ring seal 15, sealing gasket
Embodiment
In the embodiment shown in fig. 1: comprise tank body 1, mirror surface type sulfur hexafluoride humidity and compactibility sensor 2, motor 3, magnetic shaft coupling 4 and be arranged on the fan 5 in tank body 1, wherein tank body 1 is provided with safety valve 6, tensimeter 7, vacuum meter 8, air intake opening 9, 10 and 4 of gas outlets are for installing the adapter 11 of sulfur hexafluoride humidity sensor to be detected, mirror surface type sulfur hexafluoride humidity and compactibility sensor 2 is arranged on tank body 1 inwall, gas outlet 10 connects dew point hygrometer 13 through valve 12, magnetic shaft coupling 4 is inlaid on tank body 1, the outer rotor of magnetic shaft coupling 4 is connected with the output shaft of motor 3, internal rotor is fixedly connected with fan 5.Adapter 11 is provided with external thread with the link of tank body 1, and both are threaded through sealing gasket 15, and adapter 11 is provided with internal thread with the link of sulfur hexafluoride humidity sensor to be detected, and both are threaded by sealed tube.

Claims (3)

1. the built in test system of a sulfur hexafluoride gas humidity, it is characterized in that: comprise tank body (1), mirror surface type sulfur hexafluoride humidity and compactibility sensor (2), motor (3), magnetic shaft coupling (4) and be arranged on the fan (5) in tank body (1), wherein tank body (1) is provided with safety valve (6), tensimeter (7), vacuum meter (8), air intake opening (9), gas outlet (10) and for the adapter (11) of sulfur hexafluoride humidity sensor to be detected is installed, mirror surface type sulfur hexafluoride humidity and compactibility sensor (2) is arranged on tank body (1) inwall, gas outlet (10) connects dew point hygrometer (13) through valve (12), magnetic shaft coupling (4) is inlaid on tank body (1), the outer rotor of magnetic shaft coupling (4) is connected with the output shaft of motor (3), internal rotor is fixedly connected with fan (5).
2. the built in test system of a kind of sulfur hexafluoride gas humidity according to claim 1, is characterized in that: the adapter (11) that sulfur hexafluoride humidity sensor to be detected is installed is 2-4.
3. the built in test system of a kind of sulfur hexafluoride gas humidity according to claim 1, it is characterized in that: adapter (11) is provided with external thread with the link of tank body (1), both are threaded through sealing gasket (15), adapter (11) is provided with internal thread with the link of sulfur hexafluoride humidity sensor to be detected, and both are threaded by sealed tube.
CN201410335159.9A 2014-07-15 2014-07-15 Built-in detection system for sulfur hexafluoride gas humidity Pending CN104089978A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410335159.9A CN104089978A (en) 2014-07-15 2014-07-15 Built-in detection system for sulfur hexafluoride gas humidity

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410335159.9A CN104089978A (en) 2014-07-15 2014-07-15 Built-in detection system for sulfur hexafluoride gas humidity

Publications (1)

Publication Number Publication Date
CN104089978A true CN104089978A (en) 2014-10-08

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CN201410335159.9A Pending CN104089978A (en) 2014-07-15 2014-07-15 Built-in detection system for sulfur hexafluoride gas humidity

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104407101A (en) * 2014-10-31 2015-03-11 中国工程物理研究院总体工程研究所 Shutdown-free humidity monitoring device of toxic gas container
CN106093118A (en) * 2016-06-01 2016-11-09 中国电力科学研究院 The portable set of a kind of moisture in detected gas and method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1109593A (en) * 1994-03-31 1995-10-04 万春 Computerized photoelectric mirror surface condensing dew point instrument
WO2003048719A2 (en) * 2001-11-30 2003-06-12 Siemens Aktiengesellschaft Device for detecting oil penetration into the measuring chamber of a gas sensor connected to a transformer chamber by means of a membrane, and heating device for transformer oil
CN102095753A (en) * 2009-12-10 2011-06-15 上海莫克电子技术有限公司 Precision cold mirror dew point meter
CN204008529U (en) * 2014-07-15 2014-12-10 国家电网公司 A kind of built in test system of sulfur hexafluoride gas humidity

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1109593A (en) * 1994-03-31 1995-10-04 万春 Computerized photoelectric mirror surface condensing dew point instrument
WO2003048719A2 (en) * 2001-11-30 2003-06-12 Siemens Aktiengesellschaft Device for detecting oil penetration into the measuring chamber of a gas sensor connected to a transformer chamber by means of a membrane, and heating device for transformer oil
CN102095753A (en) * 2009-12-10 2011-06-15 上海莫克电子技术有限公司 Precision cold mirror dew point meter
CN204008529U (en) * 2014-07-15 2014-12-10 国家电网公司 A kind of built in test system of sulfur hexafluoride gas humidity

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
郭伟等: ""现场检测SF6气体湿度准确性的分析"", 《华东电力》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104407101A (en) * 2014-10-31 2015-03-11 中国工程物理研究院总体工程研究所 Shutdown-free humidity monitoring device of toxic gas container
CN106093118A (en) * 2016-06-01 2016-11-09 中国电力科学研究院 The portable set of a kind of moisture in detected gas and method

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Application publication date: 20141008