CN203405439U - Hydrogen fluoride gas online detection instrument - Google Patents

Hydrogen fluoride gas online detection instrument Download PDF

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Publication number
CN203405439U
CN203405439U CN201320382270.4U CN201320382270U CN203405439U CN 203405439 U CN203405439 U CN 203405439U CN 201320382270 U CN201320382270 U CN 201320382270U CN 203405439 U CN203405439 U CN 203405439U
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gas
air chamber
detection
central processing
hydrogen fluoride
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CN201320382270.4U
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Inventor
唐念
李丽
周永言
王宇
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Shanghai Lihe Automatic Instrument Equipment Co Ltd
Electric Power Research Institute of Guangdong Power Grid Co Ltd
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Abstract

The utility model discloses a hydrogen fluoride gas online detection instrument. The hydrogen fluoride gas online detection instrument comprises a detection system and a central processing system, wherein the detection system comprises a sampling device and an HF (hydrogen fluoride) gas sensitive sensor connected with the central processing system, the sampling device comprises a detection gas chamber, the detection gas chamber comprises a gas inlet and a gas outlet which are connected with a GIS (gas insulated switchgear) high-pressure gas chamber, the HF gas sensitive sensor is fixed on the detection gas chamber, the testing end of the HF gas sensitive sensor is positioned in the detection gas chamber, gas from the GIS high-pressure gas chamber enters the detection gas chamber, and the HF gas sensitive sensor is used for detecting the concentration of HF gas in the gas, transferring detection information to the central processing system for processing and further obtaining the content of the HF gas. The hydrogen fluoride gas online detection instrument disclosed by the utility model can detect the content of the HF gas in a real-time, fast and accurate manner, and can prevent the loss of SF6 (sulfur hexafluoride) in SF6 electrical equipment.

Description

A kind of hydrogen fluoride gas on-line detector
Technical field
The utility model relates to characteristic gas component pick-up unit in a kind of sulfur hexafluoride (SF6) electrical equipment, relates in particular to a kind of hydrogen fluoride gas on-line detector.
Background technology
Since the seventies in last century, sulfur hexafluoride (SF6) gas of usining has become the major equipment of electric system as the electrical equipment of insulating medium, has effectively improved the safety and economic benefit of electrical production operation.GIS(gas-insulated switchgear) be exactly that a kind of SF6 of usining is as the combined electric equipment of insulating medium.
Due to design, technique, material, installation or safeguard the deficiency of aspect, may there is insulation defect in GIS device interior, to electric power safety, produce and cause very large hidden danger.How to find as early as possible that it is one of emphasis research topic of electric power practitioner that thereby defect potential in SF6 electrical equipment or fault reduce security risk always.Now there are some researches show, by detecting SO 2, SO 2f 2, HF, CF 4deng characteristic gas component, can carry out efficient diagnosis to device interior defect or fault, because SF6 electrical equipment can produce following chemical reaction when generating heat, melting:
2SF 6+6H 2O→2SO 2+12HF+O 2
When arcing, continuous arcing, can produce following chemical reaction:
SF 6+C U→SF 4+C UF 2
SF 4+H 2O→SOF 2+2HF
SOF 2+H 2O→SO 2+2HF
In numerous characteristic gas, hydrogen fluoride HF gas often occurs the earliest, and generation is maximum, is a kind of alternative key character gas.But because HF gas is very active, very easily by the adsorbent of device interior absorption or with the material such as equipment inner wall, react, cause concentration fast reducing, accurately detect and bring great difficulty to it.Therefore, provide a kind of HF gas on-line measuring device and method, HF is detected real-time, quickly and accurately, become the major issue of needing at present solution badly.
Utility model content
The purpose of this utility model is to provide a kind of hydrogen fluoride gas on-line detector.This device can detect the content of hydrogen fluoride gas in real time, fast and exactly, and can not lose the SF6 in sulfur hexafluoride (SF6) electrical equipment.
Utility model the purpose of this utility model is achieved through the following technical solutions: a kind of hydrogen fluoride gas on-line detector, comprise detection system and central processing system, the HF gas sensor that described detection system comprises sampling apparatus and is connected with central processing system, described sampling apparatus comprises detection air chamber, described detection air chamber has air intake opening and the gas outlet being connected with GIS plenum chamber, described HF gas sensor is fixed on described detection air chamber, its test lead is positioned at and detects air chamber, gas from GIS plenum chamber enters in detection air chamber, HF gas sensor detects HF gas concentration in gas, and detection information is sent to central processing system processes, obtain HF gas content.
Described sampling apparatus also comprises piston and piston driver, described piston is arranged on and detects in air chamber, described central processing system control piston drive unit driven plunger is done straight reciprocating motion in detecting air chamber, be convenient to from electrical equipment air chamber sampling and detect after tested gas is transmitted back to air chamber.
Described sampling apparatus also comprises and being connected with central processing system and pressure transducer that tool up/down limits pressure is reported to the police, described pressure transducer is fixed on and detects on air chamber, pressure in monitor and detection air chamber changes and sends information to central processing system, for HF content value, calculate, the piston of according to circumstances driven plunger drive unit drive of described central processing system is simultaneously sampled do straight reciprocating motion and gas is recycled in GIS plenum chamber in detecting air chamber.
The utility model also comprises air-channel system, described air-channel system comprises gas inlet pipe road, air inlet stop valve, reduction valve, battery valve, gas output tube road, retaining valve and the stop valve of giving vent to anger, described gas inlet pipe road is connected with the air intake opening that detects air chamber, described air inlet stop valve, reduction valve and solenoid valve are arranged on gas inlet pipe road along gas flow direction, avoid the gas of GIS plenum chamber to enter detection air chamber, the detection information that described central processing system transmits according to pressure transducer is controlled the keying of solenoid valve and is sampled, the one end on described gas output tube road is connected with the gas outlet of detecting air chamber, described retaining valve and the stop valve of giving vent to anger are arranged on gas output tube road along gas flow direction, for preventing that the gas of GIS plenum chamber from oppositely entering detection air chamber.
Detection air chamber described in the utility model and piston adopt the very strong teflon of chemical stability, avoid the absorption of HF gas or reaction.
the utility model compared with prior art, has following beneficial effect:
(1) detector that the utility model provides is simple in structure, can the insulating gas of continuous on-line detection GIS in HF gas concentration, after detecting, gas is sent back in GIS plenum chamber, can not cause gas loss.
(2) in the detector that the utility model provides, HF gas sensor is the core component detecting, and by electrochemical reaction, detects the hydrogen fluoride HF gas content information that obtains.The sensitivity of HF gas sensor and the precision in the utility model, applied are very high, and wherein, HF gas concentration sensing range is 0 ~ 200 μ L/L, HF gas accuracy of detection: 0.01 μ L/L; The minimum 0.01 μ L/L that reaches of detection limit.
Accompanying drawing explanation
Fig. 1 is hydrogen fluoride HF gas on-line measuring device system diagram, in figure:
1.GIS plenum chamber, 2. air inlet stop valve, 3. reduction valve, 4. solenoid valve, 5. detection system, 6. retaining valve, the stop valve of 7. giving vent to anger.
Fig. 2 is detection system structural representation, in figure:
51. detect air chamber, 52.HF gas sensor, 53. pistons, 54. pressure transducers, 55. screw rods, 56. worm gears, 57. stepper motors, 58. gas outlets, 59. air intake openings.
Embodiment
Enumerate a part of instantiation below the utility model is described, be necessary to be pointed out that at this following specific embodiment, only for the utility model is described in further detail, does not represent the restriction to the utility model protection domain.Some nonessential modifications that other people make according to the utility model and adjustment still belong to protection domain of the present utility model.
embodiment mono-: pick-up unit
Hydrogen fluoride gas on-line detector is as illustrated in fig. 1 and 2 an embodiment of the present utility model, detection system, central processing system and air-channel system, consists of.The pressure transducer 54 that detection system is reported to the police by sampling apparatus, HF gas sensor 52 and tool up/down limits pressure forms, and HF gas sensor 52 is connected with central processing system respectively with pressure transducer 54.Sampling apparatus forms by detecting air chamber 51, piston 53 and piston driver.The end of detecting air chamber 51 is provided with air intake opening 59 and the gas outlet 58 being connected with GIS plenum chamber 1, and piston 53 is arranged on and detects in air chamber 51, and piston driver consists of stepper motor 57, worm gear 56 and worm screw 55, and one end of worm screw 55 connects piston 53.Initially time, piston 53 is positioned at the end of detecting air chamber 51, makes the inherent sampling of detection air chamber 51 front in emptying state.HF gas sensor 52 and pressure transducer 54 are fixed on and detect on air chamber 54.The test lead of HF gas sensor 52 is positioned at and detects air chamber 51, gas from GIS plenum chamber 1 enters in detection air chamber 51, HF gas sensor 52 detects HF gas concentration in gases, and detections electric signal is sent to central processing system processes, acquisition HF gas content.Pressure in pressure transducer 54 monitor and detection air chambers 51 also changes according to detecting air chamber 51 internal gas pressures, and detection signal is fed back to central processing system, by according to circumstances driven plunger device drive of central processing system piston 53, in detecting air chamber 51, do straight reciprocating motion, sample and gas is recycled in GIS plenum chamber 1, pressure transducer 54 is sent to central processing system by the pressure information recording simultaneously, for HF content value, calculates.
Air-channel system consists of gas inlet pipe road, air inlet stop valve 2, reduction valve 3, solenoid valve 4, gas output tube road, retaining valve 6 and the stop valve 7 of giving vent to anger, one end, gas inlet pipe road is connected with the air intake opening 59 that detects air chamber 51, and the other end is connected with GIS plenum chamber 1.Air inlet stop valve 2, reduction valve 3 and solenoid valve 4 are arranged on gas inlet pipe road along gas flow direction, avoid the gas of plenum chamber 1 to enter detection air chamber 51.Solenoid valve 4 is connected with central processing system, and the detection signal being transmitted according to pressure transducer 54 by central processing system is controlled the keying of solenoid valve 4 and sampled.The one end on gas output tube road is connected with the gas outlet 58 of detecting air chamber 51, and the other end is connected with GIS plenum chamber 1.Retaining valve 6 and the stop valve 7 of giving vent to anger are arranged on gas output tube road along gas flow direction, for preventing that the gas of plenum chamber 1 from oppositely entering, detect air chamber 51.
Detect air chamber 51 and the very strong teflon of piston 53 employing chemical stability, avoid the absorption of HF gas or reaction.
HF concentration sensing range of the present utility model is 0 ~ 200 μ L/L; HF accuracy of detection is 0.01 μ L/L.
The utility model can be summarized with other the concrete form without prejudice to spirit of the present utility model or principal character.Above-described embodiment of the present utility model and test example all can only be thought explanation of the present utility model rather than restriction, therefore every foundation essence technology of the present utility model is done above embodiment any trickle modification, equivalent variations and modification, all belong in the scope of technical solutions of the utility model.

Claims (6)

1. a hydrogen fluoride gas on-line detector, it is characterized in that, comprise detection system and central processing system, the HF gas sensor that described detection system comprises sampling apparatus and is connected with central processing system, described sampling apparatus comprises detection air chamber, described detection air chamber has air intake opening and the gas outlet being connected with GIS plenum chamber, described HF gas sensor is fixed on described detection air chamber, its test lead is positioned at and detects air chamber, gas from GIS plenum chamber enters in detection air chamber, HF gas sensor detects HF gas concentration in gas, and detection information is sent to central processing system processes, obtain HF gas content.
2. hydrogen fluoride gas on-line detector according to claim 1, it is characterized in that, described sampling apparatus also comprises piston and piston driver, described piston is arranged on and detects in air chamber, described central processing system control piston drive unit driven plunger is done straight reciprocating motion in detecting air chamber, be convenient to from electrical equipment air chamber sampling and detect after tested gas is transmitted back to air chamber.
3. hydrogen fluoride gas on-line detector according to claim 1, it is characterized in that, described sampling apparatus also comprises and being connected with central processing system and pressure transducer that tool up/down limits pressure is reported to the police, described pressure transducer is fixed on and detects on air chamber, pressure in monitor and detection air chamber changes and sends information to central processing system, for HF content value, calculate, the piston of according to circumstances driven plunger drive unit drive of described central processing system is simultaneously sampled do straight reciprocating motion and gas is recycled in GIS plenum chamber in detecting air chamber.
4. according to hydrogen fluoride gas on-line detector described in claim 1 or 2 or 3, it is characterized in that, also comprise air-channel system.
5. hydrogen fluoride gas on-line detector according to claim 4, it is characterized in that, described air-channel system comprises gas inlet pipe road, air inlet stop valve, reduction valve, battery valve, gas output tube road, retaining valve and the stop valve of giving vent to anger, described gas inlet pipe road is connected with the air intake opening that detects air chamber, described air inlet stop valve, reduction valve and solenoid valve are arranged on gas inlet pipe road along gas flow direction, the detection information that described central processing system transmits according to pressure transducer is controlled the keying of solenoid valve and is sampled, the one end on described gas output tube road is connected with the gas outlet of detecting air chamber, described retaining valve and the stop valve of giving vent to anger are arranged on gas output tube road along gas flow direction, for preventing that the gas of air chamber from oppositely entering detection air chamber.
6. according to hydrogen fluoride gas on-line detector described in claim 1 or 2 or 3, it is characterized in that, described detection air chamber and piston adopt the very strong teflon of chemical stability.
CN201320382270.4U 2013-06-28 2013-06-28 Hydrogen fluoride gas online detection instrument Active CN203405439U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320382270.4U CN203405439U (en) 2013-06-28 2013-06-28 Hydrogen fluoride gas online detection instrument

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320382270.4U CN203405439U (en) 2013-06-28 2013-06-28 Hydrogen fluoride gas online detection instrument

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103412014A (en) * 2013-06-28 2013-11-27 广东电网公司电力科学研究院 On-line detection instrument and method for hydrogen fluoride gas

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103412014A (en) * 2013-06-28 2013-11-27 广东电网公司电力科学研究院 On-line detection instrument and method for hydrogen fluoride gas
CN103412014B (en) * 2013-06-28 2015-09-09 广东电网公司电力科学研究院 A kind of hydrogen fluoride gas on-line detector and method

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Address after: 510080 Dongfeng East Road, Dongfeng, Guangdong, Guangzhou, Zhejiang Province, No. 8

Co-patentee after: SHANGHAI LIHE AUTOMATION INSTRUMENT EQUIPMENT Co.,Ltd.

Patentee after: Electric Power Research Institute of Guangdong Power Grid Co.,Ltd.

Address before: Guangzhou City, Guangdong province Yuexiu District 510080 Dongfeng East Road, No. 8 building water Kong Guangdong

Co-patentee before: SHANGHAI LIHE AUTOMATION INSTRUMENT EQUIPMENT Co.,Ltd.

Patentee before: ELECTRIC POWER RESEARCH INSTITUTE OF GUANGDONG POWER GRID Corp.

TR01 Transfer of patent right

Effective date of registration: 20200409

Address after: 510080 Dongfeng East Road, Dongfeng, Guangdong, Guangzhou, Zhejiang Province, No. 8

Patentee after: Electric Power Research Institute of Guangdong Power Grid Co.,Ltd.

Address before: 510080 Dongfeng East Road, Dongfeng, Guangdong, Guangzhou, Zhejiang Province, No. 8

Co-patentee before: SHANGHAI LIHE AUTOMATION INSTRUMENT EQUIPMENT Co.,Ltd.

Patentee before: Electric Power Research Institute of Guangdong Power Grid Co.,Ltd.

CP03 Change of name, title or address
TR01 Transfer of patent right