VCV vertical U type cross-linking polyethylene insulation cable production line

Abstract

The present invention discloses a VCV vertical cross-linkage polyethylene insulating cable production line having a U-shape layout, which includes metal conductor insualting cable core, take-up device, extruding device, tracting wheel, conductor-preheated equipment, low-temperature sulfuratino device, deflecting roller and stress relaxation device. The U-shape layout in the present invention can provide a rather large in-line stress relaxation space for insulating because of the longer cooling zone and eliminate all stresses after the insualtor passes through the stress relaxation device, which can guarantee the insualting quality reaching 750KV voltage grade and is resistant to insulation distortion.

Description

1. Technical field [0001] The invention relates to a novel cross-linked polyethylene (XLPE) insulated cable production line, in particular to a VCV vertical "U"-shaped cross-linked polyethylene (XLPE) insulated cable production line. 2. Background technology [0002] At present, the production lines of high-voltage cross-linked cables at home and abroad all adopt VCV vertical production lines, but the layout of the current production lines is "L" type. The layout of the "L" type production line has the following disadvantages: (1) Short heating zone and high temperature vulcanization: because the "L" type layout adopts high temperature and rapid vulcanization, and the cooling zone is relatively short, which affects the effect of stress relaxation and makes the cable The insulation quality of the product is affected; (2) There is no stress relaxation device; (3) Insulation deformation is easy to occur: when the insulated core is turned from vertical to horizontal in the "L" t...

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Problems solved by technology

The layout of the "L" type production line has the following disadvantages: (1) Short heating zone and high temperature vulcanization: because the "L" type layout adopts high temperature and rapid vulcanization, and the cooling zone is relatively short, which affects the effect of stress relaxation and makes the cable The insulation quality of the product is affected; (2) There is no stress relaxation device; (3) Insulation deformation is easy to occur: when the insulated core is turned from vertical to horizontal in the "L" type production line, in order to keep the insulated core in the cross-linked tube If the center position of the center position does not swing, a certain pressure and a large horizontal tension must be applied, so that a large pressure will be exerted on the insulation at the inflection point. At this time, the insulation has not been sufficiently cooled, and it is easy to produce cracks in the insulation. Internal stress, even cause the overall deformation of the insulation, which greatly affects the quality of the cable

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