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Photoacoustic spectroscopy oil gas detecting device capable of eliminating cross interference

A technology of photoacoustic spectroscopy and oil and gas detection, applied in the direction of measuring devices, material analysis through optical means, instruments, etc.

Pending Publication Date: 2018-08-10
上海思源光电有限公司 +1
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the deficiency that the existing photoacoustic spectroscopy oil and gas detection device cannot completely avoid the cross-interference of methane and ethane, and provide a combination of narrow-linewidth laser light source and traditional infrared light source that can eliminate cross-interference Photoacoustic spectroscopy oil and gas detection device

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  • Photoacoustic spectroscopy oil gas detecting device capable of eliminating cross interference
  • Photoacoustic spectroscopy oil gas detecting device capable of eliminating cross interference
  • Photoacoustic spectroscopy oil gas detecting device capable of eliminating cross interference

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Embodiment Construction

[0026] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0027] see Figure 1 to Figure 3 As stated above, the present invention discloses a photoacoustic spectroscopy oil and gas detection device capable of eliminating cross-interference. The detection device includes an oil tank 10 made of stainless steel with a volume of 200mL. The bottom of the oil tank 10 is provided with an oil inlet pipe 11 and an oil outlet pipe 12 , the oil inlet pipe 11 and the oil outlet pipe 12 are connected to the transformer, the oil inlet pipe 11 is provided with a first oil valve 13, the oil outlet pipe 12 is provided with a second oil valve 14 and a magnetic pump 15, and the magnetic pump 15 is used to drain the oil in the oil tank 10 The transformer oil is discharged back to the transformer; the inside of the oil tan...

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Abstract

The invention provides a photoacoustic spectroscopy oil gas detecting device capable of eliminating cross interference. The device comprises a degassing module and a photoacoustic spectroscopy detecting module, wherein the photoacoustic spectroscopy detecting module mainly comprises a photoacoustic cell, an infrared thermal radiation pulse light source, a filter wheel, a semiconductor laser, a photodetector and a microphone. The device sends oil gas desorbed from the degassing module into the photoacoustic spectroscopy detecting module, the concentration of methane is detected by adopting thesemiconductor laser through using the principle of photoacoustic spectroscopy, and the infrared thermal radiation pulse light source is adopted to detect other fault gases. The device can eliminate the cross interference caused by the overlap of methane and ethane absorption spectrum bands and improve the measurement accuracy of methane and ethane.

Description

technical field [0001] The invention relates to the technical field of on-line monitoring of electrical equipment, in particular to an on-line detection device for dissolved gas in power transformer oil based on photoacoustic spectroscopy, which can realize simultaneous measurement of multi-component gases in oil, and can especially eliminate the two components of methane and ethane. cross-interference of gases. Background technique [0002] Latent faults such as internal overheating and partial discharge may occur in oil-immersed power transformers during long-term operation. Overheating and discharge will cause cracking of insulating oil, thereby producing hydrogen, methane, ethane, acetylene, ethylene, carbon monoxide, carbon dioxide, etc. Dissolved gas; different types of faults produce different gas components and concentrations; through online monitoring of the concentration of dissolved gases in the oil, the operating status of the transformer can be understood in a t...

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Application Information

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IPC IPC(8): G01N21/17
CPCG01N21/1702G01N2021/1704
Inventor 魏立新陈兴龙盛杨刘雪明任玲
Owner 上海思源光电有限公司
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