10-35kv insulating tubular bus and manufacturing method thereof

Abstract

The invention discloses a three-layer coextruded preformed 10-35KV insulating tubular bus and a manufacturing method thereof. The section structure of the tubular bus has four layers, namely a metal tube conductor layer, a three-layer coextruded heat-shrinkage bush layer, a metal grounding shielding layer and an outer protective jacket layer in sequence from inside to outside. The present application provides a preformed product of the 10-35KV insulating tubular bus, which breaks through the traditional technology of processing the tubular bus by adopting polytetrafluoroethylene lapping or a heat-shrinkage multilayer bush. The 10-35KV insulating tubular bus has the characteristics that the three-layer coextruded heat-shrinkage bush formed by single coextrusion can be well jointed with a metal conductor tube without a clearance, so that a phenomenon of expansion with heat and contraction with cold due to the influence of cold and hot environments is eliminated, and interference of electric fields and magnetic fields of other tubular buses is avoided; meanwhile, the production process of the present application is simple and feasible, the manpower and the labor intensity are reduced, the product quality is not influenced by human factors, the production efficiency and the yield are greatly improved, the cost is lowered, and comprehensive competitiveness are increased for enterprises.

Description

technical field [0001] The invention relates to a three-layer co-extruded prefabricated 10-35kv insulating tubular busbar and a preparation method thereof, belonging to the field of manufacturing and processing of tubular busbars. Background technique [0002] Insulated tubular busbar has the characteristics of high current, good heat dissipation, low skin effect, low power loss, high mechanical strength, good insulation performance, anti-environmental interference, high safety factor, convenient installation and maintenance, and long service life. It has been recognized and accepted by more and more customers, and has been widely used in power transmission and transformation lines. However, at present, the manufacturing process of the insulating layer of the insulating tubular bus produced in China still needs to be improved and perfected. For example, there is a gap between the polytetrafluoroethylene-wrapped insulating tubular bus and the wrapping insulating layer, and th...

AI Technical Summary

Problems solved by technology

However, at present, the manufacturing process of the insulating layer of the insulating tubular bus produced in China still needs to be improved and perfected. For example, there is a gap between the PTFE-wrapped insulating tubular bus and the wrapping insulating layer, and there is a problem of high partial discharge; Epoxy resin cast insulated tubular busbars have high costs, and the thermal expansion and contraction of insulating materials and conductor materials are inconsistent, which may cause cracks in the insulating layer; EPDM three-layer co-extruded insulating tubular busbars cannot realize the direct bending Extrusion, after the extrusion is completed, there may be quality problems such as the insulation layer may be damaged or the conductor will crack, etc.

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