Insulating oil gas content tester calibration device applied to vacuum differential pressure method principle

Abstract

The invention discloses an insulating oil gas content tester calibration device applied to a vacuum differential pressure method principle. The device comprises a first tank body, a second tank body,a piston, five three-way electromagnetic valves, ten two-way electromagnetic valves, two gear oil pumps, a vacuum pump, a clamping sleeve type tee joint, a clamping sleeve type four-way joint, an array heating device, a pressure sensor, a steel cylinder gas source, three liquid flow meters and a gas flow meter. After gas replacement and vacuum degassing are carried out in the second tank body, drygas is quantitatively injected, the distribution of the gas in a gas phase and a liquid phase is balanced through the up-and-down movement of the piston, and after standing, the gas above the liquidis discharged through the upward movement of the piston, so a sample with a certain gas content is prepared; the sample can be conveyed to a sample inlet of a to-be-calibrated instrument through the calibration device to be tested and can be injected into the first tank body through the quantitative pipe to be tested, and calibration of the insulating oil gas content tester based on the vacuum differential pressure method principle is achieved.

Description

technical field [0001] The invention relates to the field of insulating oil quality testing instruments, in particular to a calibrating device for an insulating oil gas content tester applied to the principle of a vacuum differential pressure method. Background technique [0002] The gas content in insulating oil is a key indicator reflecting the sealing performance of large oil-immersed transformers, reactors and other electrical equipment. In order to ensure the safe operation of UHV AC and DC oil-filled equipment and EHV oil-filled equipment, relevant domestic standards The gas content standards in insulating oil have clear requirements. For example, in the GB50835-2013 "1000KV Power Transformer, Oil-immersed Reactor, and Transformer Construction and Acceptance Specifications" standard, it is clearly stated that UHV large oil-filled equipment should be installed and accepted during the installation and acceptance process. In GB / T 7595-2017 "Transformer Oil Quality in Oper...

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the deficiencies of the prior art. The present invention provides a calibration device for insulating oil gas content tester applied to the principle of vacuum differential pressure method, which solves the problem of calibrating the whole testing equipment, and passes The method of gas replacement and vacuum degassing of the sample reduces the influence of the partial pressure of water vapor in the sample on the test; using a single gas as the main component to prepare oil samples with different gas content calibration is more conducive to the use of gas phase Chromatography is used to detect the real gas content of the sample; the device can be used to calibrate multiple test instruments at the same time, saving labor costs and shortening the calibration time

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