Vacuum varnish dipping method for oil tank oil measurement sensor plastic pipe

Abstract

The invention discloses a vacuum varnish dipping method for an oil tank oil measurement sensor plastic pipe, and belongs to the technical field of varnish dipping methods. The method comprises the following steps that S3, the vacuum degree is tested, a varnish dipping cylinder is sealed through a sealing cover, after a varnish inlet valve between the varnish dipping cylinder and a varnish storagetank is closed, a gas inlet valve and a vacuum gauge valve at the upper end of the varnish dipping cylinder are opened, then a vacuum pump is started for vacuumizing the varnish dipping cylinder for 1-2 minutes, thus, the vacuum degree in the varnish dipping cylinder is higher than -0.085MPa, the required time is recorded, the vacuum gauge valve is closed, and the varnish inlet valve is opened, sothat the varnish dipping cylinder communicates with the varnish storage tank so as to communicate with the outside; and S4, a part is subjected to varnish dipping, specifically, prepared and cured varnish is poured into the varnish storage tank, the varnish inlet valve is closed, and the sealing cover on the varnish dipping cylinder is taken down. The method is low in cost and insulation varnishconsumption, the penetration ability of insulation varnish can be improved, the filling rate of insulation varnish can be increased, defects such as pinholes, bubbles and pits in plastic pipe part substrates can be eliminated, and thus the overall mechanical strength, insulation strength and moisture and mildew resistance of the plastic pipe are improved.

Description

technical field [0001] The invention relates to the technical field of varnish dipping methods, in particular to a vacuum varnish dipping method for a plastic tube of an oil level sensor in a fuel tank. Background technique [0002] Vacuum impregnation mainly uses vacuum containers (varnish tanks) to hold workpieces to be treated and temporarily store insulating varnish, and then vacuumize them and perform vacuum impregnation treatment. Its principle is to place the workpiece to be processed in a vacuum container, remove the moisture, air and other volatile substances in the workpiece by vacuuming, and then fill the gap with insulating varnish. It can be used for insulation impregnation treatment of electrical coils such as micro-motors, transformers, power transformers, etc. It can improve the penetration ability of insulating varnish and increase the filling rate, thereby improving the overall mechanical strength, insulation strength, moisture-proof, and mildew-proof perfo...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the above technical problems, and to provide a method for vacuum impregnation of plastic pipes of fuel tank fuel level sensors. Pinholes, air bubbles, pits and other defects on the part substrate, thereby improving its overall mechanical strength, insulation strength and moisture-proof, mildew-proof performance

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