CN102800406A

CN102800406A - Plastic insulation plastic sheath power cable

Info

Publication number: CN102800406A
Application number: CN2012102930523A
Authority: CN
Inventors: 刘运来; 王趁意; 王利年; 王新年; 李伟; 姚凤林; 王东海
Original assignee: TIANJIN TIANLAN GROUP CO Ltd
Current assignee: Tianjin Xiaomao Tianlan Group Co ltd
Priority date: 2012-08-17
Filing date: 2012-08-17
Publication date: 2012-11-28
Anticipated expiration: 2032-08-17
Also published as: CN102800406B

Abstract

The invention relates to a plastic insulation plastic sheath power cable, which comprises dynamic wire cores and earth wire cores. Each dynamic wire cores comprise a dynamic wire core conductor, an inner shielding layer, an insulating layer and an outer shielding layer, wherein the inner shielding layer is extruded outside a main wire core conductor and then the insulating layer is extruded, and the outer shielding layer is extruded outside the insulating layer. Each earth wire cores comprise an earth wire core conductor and an earth wire core semiconductive layer coating the earth wire core conductor. The three dynamic wire cores, the three earth wire cores and saddle-shaped infill in the center are stranded together; an inner sheath is extruded outside the earth wire cores; steel wires are lapped outside the inner sheath and then a galvanized wire braid layer is braided; and an outer shield is extruded outside the galvanized wire braid layer. According to the plastic insulation plastic sheath power cable, the steel wires are lapped outside the inner sheath and then the galvanized wire braid layer is braided, so that the lapped steel wires are fastened, and the cable structure is guaranteed to be stable; in addition, the stability of electrical performance and mechanical performance of the cable is ensured.

Description

Plastic insulation plastic sheath power cable

Technical field

The invention belongs to the cables manufacturing field, relate to a kind of plastic insulation plastic sheath power cable, being particularly useful for rated voltage is the production that 0.6/1kV～26/35kV moulds the cable insulation, moulds the cable sheath power cable.

Background technology

In extruded insulation power cable GB/T 12706-2008 standard, rated voltage is 0.6/1kV～26/35kV, moulds the cable insulation, moulds the cable sheath power cable.Its cable all is transmission high-voltage power cables, and general is fixedly to lay not move to use.It is that cable is vertically gone into the well that but this cable uses in the colliery.Long-time vertical placement of cable not having under other the external force situation, with regard to the deadweight of cable itself, just makes cable destroyed.In order to improve the useful life of cable, the standard code construction of cable its objective is the whole pulling force of strengthening cable with thicker wire, LWA light wire armoured cable.But quality defects still at present, cable use that the steel wire of armouring arches upward after a period of time, and the oversheath arch of cable is broken, and this is a difficult problem that perplexs cable manufacturing enterprise for a long time.

Summary of the invention

Problem to be solved by this invention is; Overcome the deficiency of prior art; A kind of plastic insulation plastic sheath power cable is provided, is employed in outside the inner sheath and weaves the zinc-coated wire braid again behind the wrapped steel wire, wrapped steel wire is played the effect of tightening; Guaranteed that the construction of cable is stable, also guaranteed cable electrical property, stable mechanical performance simultaneously.

The present invention solves its technical problem and takes following technical scheme to realize:

According to a kind of plastic insulation plastic sheath power cable provided by the invention; Comprise power core and ground core; The power core is made up of power line core conductor, internal shield, insulating barrier and outer shielding layer; The master core conductor extrudes extruded insulation layer behind the internal shield outward, and insulating barrier extrudes outer shielding layer outward again; The ground core is made up of the outer semi-conductive layer that coats of ground wire core conductor and its; Shape of a saddle filler by place at three power cores, three ground core and centers is stranded, its outer inner sheath that extrudes, and inner sheath weaves the zinc-coated wire braid behind the wrapped steel wire outward again, and the zinc-coated wire braid extrudes oversheath outward again.

The present invention compared with prior art has significant advantage and beneficial effect:

Because the present invention behind the wrapped steel wire, adopts braiding machine braiding zinc-coated wire outside inner sheath, wrapped steel wire is played the effect of tightening, and when oversheath is extruded in production, has also guaranteed the rounding property of cable, this construction of cable is stable, and electrical property, mechanical performance are also very stable.

Embodiment of the present invention is provided by following examples and accompanying drawing thereof in detail.

Description of drawings

Fig. 1 is a structural representation of the present invention.

Wherein: 1, power line core conductor, 2, internal shield, 3, insulating barrier, 4, outer shielding layer, 5, the ground wire core conductor, 6, the core semi-conductive layer, 7, shape of a saddle filler, 8, inner sheath, 9, steel wire, 10, the zinc-coated wire braid, 11, oversheath.

Embodiment

Below in conjunction with accompanying drawing and preferred embodiment, to according to embodiment provided by the invention, structure, characteristic and effect thereof, specify as after.

A kind of plastic insulation plastic sheath power cable as shown in Figure 1; Comprise power core and ground core; The power core is made up of power line core conductor, internal shield, insulating barrier and outer shielding layer; The master core conductor 1 outer internal shield 2 back extruded insulation layers 3 that extrude, insulating barrier extrudes outer shielding layer 4 outward again; The ground core is made up of the outer ground core semi-conductive layer 6 that coats of ground wire core conductor 5 and its; Shape of a saddle filler 7 by place at three power cores, three ground core and centers is stranded, its outer inner sheath 8 that extrudes, and inner sheath weaves zinc-coated wire braid 10 behind the wrapped steel wire 9 outward again, and the zinc-coated wire braid extrudes oversheath 11 outward again.

This construction of cable is stable, and electrical property, mechanical performance are also very stable, through long-time vertical use the in the colliery, steel wire does not take place arch upward and destroy the phenomenon of sheath, has guaranteed the normal use of cable.

Claims

1. plastic insulation plastic sheath power cable; Comprise power core and ground core; It is characterized in that: described power core is made up of power line core conductor, internal shield, insulating barrier and outer shielding layer; The master core conductor extrudes extruded insulation layer behind the internal shield outward, and insulating barrier extrudes outer shielding layer outward again; The ground core is made up of the outer semi-conductive layer that coats of ground wire core conductor and its; Shape of a saddle filler by place at three power cores, three ground core and centers is stranded, its outer inner sheath that extrudes, and inner sheath weaves the zinc-coated wire braid behind the wrapped steel wire outward again, and the zinc-coated wire braid extrudes oversheath outward again.