A water-cooled resistor with high voltage resistance

Abstract

The water-cooled resistor with high voltage resistance comprises a resistor tube, an insulating filler layer, an insulating sleeve and a metal tube, wherein the resistor tube comprises a ceramic tubeand a resistor wire wound on the outer surface of the ceramic tube; The resistance tube includes a porcelain tube and a resistance wire wound around the outer surface of the porcelain tube; the two ends of the metal tube are provided with wire outlet holes; two ends of the resistance wire pass through from the wire outlet holes at the correspoing ends; an insulating potting re is arranged betweenthat end of the porcelain tube and the end of the insulate sleeve,; The two ends of the porcelain tube are respectively coated with a sealant ring, and the inner wall of the metal tube abuts against the outer side of the sealant ring. The ring end cover is fixedly connected with the metal pipe, the ring end cover abuts against the inner side of the sealant ring, and the sealant ring, the metal pipe and the ceramic pipe are clamped tightly; The ring end cap is connected with a fluid connection, and the fluid connection is communicated with the inside of the porcelain pipe. As the outer side ofthe ceramic tube is successively provided with an insulating filler layer, an insulating sleeve and a metal tube, the resistance wire is sufficiently separated from the atmosphere, and the high voltage of the resistance wire will not be broken down, so as to meet the demand of the high voltage service environment.

Description

technical field [0001] The invention relates to the technical field of resistors, in particular to a water-cooled resistor with high voltage resistance. Background technique [0002] Water-cooled resistors generally include a porcelain tube and a resistance wire wound on the porcelain tube. The two ends of the porcelain tube are respectively connected to the water inlet joint and the water outlet joint. The heat generated by the resistance wire is taken away by the liquid flowing inside the porcelain tube. . In order to ensure insulation, the circulating liquid inside the porcelain tube cannot penetrate the resistance wire on the outer surface of the porcelain tube, so the seal between the water inlet and outlet joints and the porcelain tube is more critical. Currently, the water inlet and outlet joints are generally threaded into the porcelain tube. The porcelain tube is easy to wear and the sealing performance is unstable. The surface of the resistance wire is insulated ...

AI Technical Summary

Problems solved by technology

In order to ensure insulation, the circulating liquid inside the porcelain tube cannot penetrate the resistance wire on the outer surface of the porcelain tube, so the seal between the water inlet and outlet joints and the porcelain tube is more critical. Currently, the water inlet and outlet joints are generally threaded with the porcelain tube. The porcelain tube is easy to wear and the sealing is unstable

The surface of the resistance wire is insulated from the atmosphere by spraying a layer of insulating varnish, but the high voltage will break down the insulating varnish and cause the entire resistance to fail. Therefore, the existing water-cooled resistors must be used with limited voltage, which cannot meet some high-voltage environments.

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