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Radial resonant photoacoustic cell for real-time monitoring of sulfur hexafluoride gas decomposition process

A technology of sulfur hexafluoride gas and resonant photoacoustic cell, which is used in measurement devices, analysis materials, material analysis by optical means, etc., can solve the problem of accurate quantification of products that cannot be monitored in real time, which are difficult to chemically and very active in the gas decomposition process. question

Inactive Publication Date: 2016-04-13
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the invention is to overcome that existing technical means cannot monitor SF in real time 6 The gas decomposition process and the limitation that it is difficult to accurately quantify the products with very active chemical properties provide a radial resonant photoacoustic cell

Method used

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  • Radial resonant photoacoustic cell for real-time monitoring of sulfur hexafluoride gas decomposition process

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0015] Such as figure 1 As shown, the radial resonant photoacoustic cell of the present invention includes a resonant cavity 1, a high-voltage electrode 2, a ground electrode 3, an air inlet 4, an air outlet 5, a high-sensitivity microphone 6, a front buffer cavity 7, a rear buffer cavity 8, Incident window 9, exit window 10.

[0016] The incident window 9 and the exit window 10 are located on the front buffer cavity 7 and the rear buffer cavity 8 respectively. The front buffer cavity 7 and the rear buffer cavity 8 are respectively located on both sides of the resonance cavity 1 , communicate with the resonance cavity 1 , and are symmetrical about the geometric center of the resonance cavity 1 . There is an air inlet 4 on the side of the front buffer cavity 7, and an air outlet 5 on the side of the rear buffer cavity 8; a high-sensitivity mic...

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Abstract

The invention discloses a radial resonant photo-acoustic cell for monitoring a decomposition process of SF6 (sulfur hexafluoride) gas in real time. The radial resonant photo-acoustic cell mainly comprises a resonant cavity, a front-end buffer cavity, a rear-end buffer cavity, an incident window, an emergent window, a gas inlet, a gas outlet, a high-sensitivity microphone, a high-voltage electrode and a grounded electrode, wherein the incident window and the emergent window are respectively positioned on the front-end buffer cavity and the rear-end buffer cavity; the front-end buffer cavity and the rear-end buffer cavity are respectively formed in two sides of the resonant cavity and are symmetric to each other around the geometric center of the resonant cavity; the gas inlet and the gas outlet are respectively formed in the side surfaces of the two buffer cavities; the high-sensitivity microphone is fixed at one end of the axial center of the resonant cavity; the high-voltage electrode and the grounded electrode are arranged at the radial end of the geometric center of the resonant cavity, and can discharge electricity to decompose the SF6 gas. The radial resonant photo-acoustic cell can be used for quantitatively detecting various gases such as HF, SF5, SF4, SF2, SOF4, SO2F2, SOF2, SO2, CF4, CO2 and H2O in real time, and is particularly applicable to real-time quantitative measurement analysis of SF6 decomposers with unstable chemical property.

Description

technical field [0001] The invention belongs to the technical field of electric equipment state monitoring, and in particular relates to the monitoring technology of sulfur hexafluoride gas decomposition process. Background technique [0002] With sulfur hexafluoride gas (SF 6 ) as electrical equipment for insulation and arc extinguishing medium, such as GIS (Gas-Insulated Switchgear, Gas-Insulated Switchgear), circuit breakers, transformers, switchgear, etc., with its advantages of high reliability, small maintenance, and small footprint Developed and widely used in the high voltage and ultra high voltage fields of power systems, it has gradually become one of the preferred equipment for modern substations. However, in recent years SF 6 However, some problems and accidents have occurred in the operation of gas-insulated electrical equipment. According to decades of operation and failure statistics, the SF 6 In electrical equipment with insulating gas, the proportion of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/01G01N21/3504
CPCG01N21/1702G01N2021/1704
Inventor 张国强林涛邱宗甲
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI