Externally-sleeved insulated sleeve

Abstract

The invention discloses an externally-sleeved insulated sleeve. An epoxy resin coat is coated on the surface of a conductive body, a polyethylene glue linking material sleeve is sleeved at the outer part of the conductive body, an aluminum foil is stuck to the surface of the polyethylene glue linking material, a copper strip is stuck to the surface of the aluminum foil, the copper strip is led out to be used as a grounding wire, a semi-conductive material is wrapped on the surface of the copper strip, a polytetrafluoroethylene film is lapped on the outer part of the semi-conductive material and compacted, an insulating bus bar and an outer protective casing are sheathed on the outermost layer, the polyethylene glue linking material sleeve is divided into a plurality of sections, the bent part is divided into a plurality of small sections, the head of each section of polyethylene glue linking material sleeve is provided with a plurality of protrusions, the tail of each section of polyethylene glue linking material sleeve is provided with a plurality of grooves, and the epoxy resin coats for filling air are coated on the head and the tail of each section of polyethylene glue linkingmaterial sleeve. The whole externally-sleeved insulated sleeve has the advantages of heat resistance, acid and alkali resistance, good insulating performance, high safety factor, convenient installation and the like, and has great popularization value.

Description

Technical field: [0001] The patent of the present invention relates to a bushing, in particular to a jacket-type insulating bushing which is directly covered with an insulating sleeve on the outer surface of a conductor, and has high insulation performance, large allowable tensile strength stress, corrosion resistance, and convenient installation. Background technique: [0002] With the development of science and technology, the voltage level of power transmission and transformation is gradually increasing, and the insulation requirements of conductors are also getting higher and higher. In the world, cables of various specifications from low voltage to high voltage have appeared one after another. The higher the voltage, the higher the insulation level of the conductors. Therefore, the technical difficulty involved will also increase accordingly. At the same time, with the development of industry and the improvement of people's living standards, the gradual increase in elec...

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Problems solved by technology

[0003] The existing conductors mainly adopt copper busbar structure, which mainly has the following disadvantages: (1) Because the single busbar of copper busbar is a rectangular parallelepiped structure, the specification is roughly 10MM×120MM, corona discharge is easy to occur at the water chestnut of the busbar, and the safety factor Not high; (2) Because there is a certain distance between the pipe busbar and the distribution box between the transformer and the distribution box, overhead installation is required. During the overhead process, the copper bar busbar is prone to sagging due to its own weight, and a short distance is required for pillar support during installation; ( 3) The skin effect of the copper busbar is large

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