Headspace type vacuum oil sample taking method

Abstract

The invention discloses a headspace type vacuum oil sample taking method. The method is based on a headspace type vacuum oil sample taking apparatus. The method comprises the steps of installing an oil taking nozzle on an oil outlet of a transformer sampling valve; unscrewing a protective cylinder from a first oil taking valve connected through threads; sleeving a protective cylinder installation hole onto a prism of an oil taking rod; rotating an operation rod on a side wall of the protective cylinder along a hinge shaft to be parallel to a support board; pushing the operation rod to drive the protective cylinder to rotate; pushing a sealing ball by the oil taking rod so as to enable an oil guide hole of the oil taking rod to communicate with a first oil taking hole; enabling an oil sample to flow into the oil guide hole through the first oil taking valve; taking off the protective cylinder; rotating a handle on a second oil taking valve to open the second oil taking valve; and enabling the oil sample to flow out of an oil outlet nozzle through the second oil taking valve. In the method, the protective cylinder is rotated so as to drive the oil taking rod to rotate, maintenance workers can take the oil sample without carrying tools, so that the oil sampling method is easier, faster and more effort-saving; the oil sample can be taken at a constant speed in a relatively vacuum state through two-level sealing and ball valve control.

Description

technical field [0001] The invention belongs to the field of oil extraction, and in particular relates to a headspace vacuum oil sampling method. Background technique [0002] After a period of operation of power equipment such as transformers, if the electrical indicators of the transformer oil fail to pass the test due to short circuit or other reasons, it is necessary to filter the oil to improve its purity. At this time, it is necessary to take an oil sample from the transformer for oil sample testing. [0003] The existing technology is to install an external hexagonal plug with an oil hole at the bottom of the external thread at the oil outlet of the transformer sampling valve to realize the oil sample seal of the transformer. Then open the external hexagonal oil plug, and the oil will slowly come out from the bottom oil hole. [0004] This oil sampling method needs to be equipped with more tools to take oil samples, and the sampling method is unscientific, basically...

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Problems solved by technology

[0004] This oil sampling method needs to be equipped with more tools to take oil samples, and the sampling method is unscientific, basically can not reach a relative vacuum, the oil discharge speed is difficult to control, the oil is uneven, the oil sample has air bubbles, and the oil sample touches the air surface Wide and other problems, and need to use tools such as wrench to take oil, if there is no tool, it is impossible to take oil

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