Heat pipe type transformer tube

Abstract

A heat-tube type transformer bushing comprises a conduction tube 1, a radiator 4, a main insulating layer 7, an insulating external bushing 3 and a connection flange 6. The conduction tube 1 is a hollow metal tube, one end of which is connected with the radiator 4, the other end of which is connected with a connecting terminal 11. Non-combustible environment protection type cooling fluid 2 is filled in the conduction tube 1. The radiator 4 is a hollow metal cavity, the cavity internal is connected with the internal cavity of the conduction tube to form an enclosed cavity. The main insulating layer 7 winds the external of the conduction tube 1, the insulating external bushing 3 and the connection flange 6 are bushed in the outside of the main insulating layer 7. The invention has advantages of no combustion and explosion hidden troubles, low temperature rise, small volume and light weight.

Description

technical field [0001] The invention relates to a high-voltage electrical device for high-voltage equipment grounding shells or high-voltage conductors passing through walls, in particular to heat pipe transformer bushings for high-current working conditions in which high-voltage equipment grounding shells or high-voltage conductors pass through walls. Background technique [0002] At present, there are two types of high-voltage bushings used in high-voltage lines passing through walls or equipment grounding enclosures: one is oil-filled or gas-filled bushings, which contain non-solid oil or gas, and exist Oil and gas leakage, unstable electrical performance, poor mechanical and pollution resistance, heavy maintenance workload, flammable and explosive hazards to personal and equipment safety, short service life and other defects; the other type is dry composite insulating bushing, The main insulation layer of this type of bushing is generally cast by capacitor pressure equal...

AI Technical Summary

Problems solved by technology

[0002] At present, there are two types of high-voltage bushings used in high-voltage lines passing through walls or equipment grounding enclosures: one is oil-filled or gas-filled bushings, which contain non-solid oil or gas, and exist Oil and gas leakage, unstable electrical performance, poor mechanical and pollution resistance, heavy maintenance workload, flammable and explosive hazards to personal and equipment safety, short service life and other defects; the other type is dry composite insulating bushing, The main insulation layer of this type of bushing is generally cast by capacitor pressure equalizing plate and epoxy resin (for example, using glue impregnated paper (RIP) dry bushing process, etc.), or wound with glass fiber material dipped in epoxy resin Made of, its thermal insulation performance is very good

In order to make the conductive rod have a lower temperature rise, thicker conductive rods are usually used to reduce the current density to reduce the heat generated, but this increases the amount of materials used and increases the cost

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