Chromatographic instrument calibration device

Abstract

The invention provides a chromatographic instrument calibration device. A closed circulating space is formed by an upper cylinder body, a lower cylinder body and an external pipeline, and oil and gasare fully mixed in the closed circulating space under the action of a circulation pump to prepare standard insulating oil. The device uses a temperature controller to simulate an operating environmentof the insulating oil in actual equipment and realizes the calibration of an on-line chromatographic instrument under different environments by changing temperature and other parameters. The lower cylinder body is provided with an oil sample sampling port, which can realize off-line sampling for chromatograph detection in a laboratory. In addition, the whole calibration device is arranged on a movable cart, so that the device has mobility and is more convenient to use. The chromatographic instrument calibration device can simultaneously detect and evaluate technical indexes such as test accuracy, test response time and the like of a plurality of on-line chromatographic instruments; and the oil sample can be recycled so as to save cost.

Description

technical field [0001] The invention relates to a calibration device, in particular to a calibration device for an online chromatograph. Background technique [0002] For a long time, dissolved gas analysis (DGA) in insulating oil (including transformer oil and capacitor oil)—gas chromatographic analysis, has been recognized by countries all over the world as an important tool for monitoring and diagnosing early failures of oil-filled power equipment and preventing catastrophic failures. the best method. With the development of condition-based maintenance of power equipment, it is becoming more and more important to use online chromatograph to detect the content of various characteristic gases dissolved in transformer insulating oil in real time. The most basic thing is to accurately test the online chromatograph. real-time evaluation. [0003] The initial analysis of dissolved gas in oil is based on laboratory analysis and detection technology. Oil samples are collected o...

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Problems solved by technology

[0005] If the online chromatograph is installed on the actual operating equipment for detection, since the gas content in the actual equipment oil is relatively stable, the detection will encounter a lot of inconvenience under normal circumstances, and multi-point calibration cannot be performed at the same time

[0006] If the online chromatograph is installed on the laboratory oil tank for detection, since the dissolution and release of gas in the oil is always in a dynamic process, it is difficult to obtain a stable standard oil source; and the flow state and temperature of the oil in the oil tank are consistent with the actual The situation does not match, which affects the accuracy of the evaluation

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