A headspace sampling method

Abstract

The embodiment of the invention discloses an omniseal headspace sampling technology used for measuring dissolved contents in the transformer oil. The omniseal headspace sampling technology used for measuring dissolved contents in a transformer oil is used to solve technical problems in prior technology when an oil sampling is infused into a headspace sampling flask that a big error is usually generated due to the interfusion of outer ingredients and volatilization of volatile ingredients, as well as the difference of oil contents in every infusing time and environmental change. The method of the embodiment of the invention comprises the steps of preparing a gas tank flask, an oil sampling flask, a volumetric flask, a headspace sealed needle and a headspace sampling flask, wherein the gas tank flask, the oil sampling flask, the volumetric flask, the headspace sealed needle and the headspace sampling flask are communicated in a sealed mode; the technology comprises the steps of S1, squeezing air in the gas tank flask to the oil sampling flask by controlling a piston in the gas tank flask, and using pressure generated from the gas to infuse the oil sampling to the volumetric flask through a second one-way valve; S2, controlling a piston plate of the volumetric flask and squeezing the oil sampling in the volumetric flask to be infused into the headspace sampling flask through the headspace sealed needle.

Description

technical field [0001] The invention relates to the field of transformer oil measurement, in particular to a headspace sampling method. Background technique [0002] At present, the measurement of the dissolved components in the transformer oil has become an important means to detect the operation status of the transformer. The analysis of dissolved gas in transformer oil can effectively find various potential faults of transformers; the analysis of characteristic non-gaseous products in transformer oil, such as furfural, methanol, acetone, etc., can effectively provide the aging status of transformer solid insulation. In the process of transformer oil sampling, in order to prevent the volatilization of dissolved components in the oil, especially the volatile components, and to avoid the mixing of other components, fully sealed sampling technology came into being; these technologies adopt a fully sealed structure design, with Ensure that the volatilization of volatile compo...

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides a fully sealed headspace sampling process for measuring dissolved components in transformer oil, which solves the problems caused by the mixing of external components and the volatilization of volatile components when injecting oil samples into the headspace sampling bottle in the prior art And the difference in the amount of oil sample injected each time and the change of the environment lead to technical problems that cause large errors

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