CN202839108U

CN202839108U - Low-voltage power cable

Info

Publication number: CN202839108U
Application number: CN 201220459126
Authority: CN
Inventors: 马晓天; 何岩; 张克政
Original assignee: LIAONING SULI WIRE AND CABLE CO Ltd
Current assignee: LIAONING SULI WIRE AND CABLE CO Ltd
Priority date: 2012-09-10
Filing date: 2012-09-10
Publication date: 2013-03-27
Anticipated expiration: 2022-09-10

Abstract

Disclosed is a low-voltage power cable, belonging to the technical field of cables. The cable comprises at least one group of core wire, fillings, a wrapping tape, and a sheath layer, wherein the core wire consists of a conductor wire, a semi-conductive shielding water-blocking tape, and an insulating layer; the semi-conductive shielding water-blocking tape wraps the conductor wire; the insulating layer is extruded outside the semi-conductive shielding water-blocking tape; the wrapping tape wraps outside the insulating layer; the fillings are filled between the insulating layer and the wrapping tape; and the sheath layer is extruded outside the wrapping tape. Compared with low-voltage power cables in the prior art, the low-voltage power cable provided by the utility model has the beneficial effect that: the cable employs a combination structure that the conductor is externally wrapped by the semi-conductive shielding water-blocking tape which takes a rubber and thermoplastic elastomer as the main body and integrates the buffering, water-blocking, and shielding functions, so that not only the semi-conductive shielding effect is realized and the electric field is well-distributed, but also the objective of buffering of mechanical stress between the conductor and the insulating layer and the objective of water blocking are achieved.

Description

A kind of lv power cable

Technical field

The utility model belongs to the cable technology field, particularly a kind of lv power cable.

Background technology

At present, widely used lv power cable conductor adopts circular, press circle, the structure such as fan-shaped, because the traditional cable conductor structure is in wire drawing, the strand system, press, can produce small crackle at conductive surface in the die mould production process, burr, concavo-convex, fringe margin, overlap, the defectives such as scratch, cable is in operation and bears high pressure and high electric field action, the defective that has conductive surface will cause electric field stress to concentrate, the leakage electronics increases severely, as add that moisture will produce water tree and electricity tree under existing, can greatly reduce insulating capacity, cause insulating barrier to puncture, in addition, because operating cable makes between conductor and the insulation and produces the gap because the variation of loading causes the variations in temperature of cable and produce expanding with heat and contract with cold, the in addition intrusion of moisture, then can produce partial discharge, have a strong impact on the safe operation of cable, reduce the useful life of cable.

Summary of the invention

Technical problem to be solved in the utility model is, overcomes the defective that prior art exists, and a kind of lv power cable is provided.

The technical solution adopted in the utility model comprises at least one core assembly line, inserts, twining package tape and restrictive coating; Wherein, heart yearn comprises conductor lines, semi-conductive screen waterstop and insulating barrier; The wrapped conductor lines of semi-conductive screen waterstop, insulating barrier are extruded in outside the semi-conductive screen waterstop; Twining package tape is wrapped outside insulating barrier, fills inserts between insulating barrier and twining package tape, and restrictive coating is extruded in outside the twining package tape.

Can armouring tape or steel wire between twining package tape and restrictive coating.

Described twining package tape adopts polypropylene embossing twining package tape.

Described conductor lines adopts copper, aluminium or alloy conductor line.

The utility model compared with prior art beneficial effect is: this cable adopts the combining structure of the outer wrapped semi-conductive screen waterstop of conductor, it is main body that the semi-conductive screen waterstop adopts rubber, thermoplastic elastomer, is to integrate buffering, block water and the function such as shielding.Not only play the semi-conductive screen effect, uniform electric field, and the purpose that can also between conductor and insulation, play buffer mechanism stress and block water.

Description of drawings

Fig. 1 is the utility model structural representation;

Among the figure: 1, conductor lines, 2, the semi-conductive screen waterstop, 3, insulating barrier, 4, inserts, 5, twining package tape, 6, steel band or steel wire, 7, restrictive coating.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing:

Conductor lines can be selected copper, aluminium or alloy conductor line, and the present embodiment conductor lines is chosen the copper conductor line, and heart yearn is chosen four groups, and wherein one group is circular heart yearn, and other three groups is sector conductor;

As shown in Figure 1, this cable comprises four core assembly lines, inserts 4, twining package tape 5 and restrictive coating 7; Wherein, heart yearn comprises conductor lines 1, semi-conductive screen waterstop 2 and insulating barrier 3; Semi-conductive screen waterstop 2 wrapped copper conductor lines 1, insulating barrier 3 is extruded in outside the semi-conductive screen waterstop 2; Polypropylene embossing twining package tape 5 is wrapped outside insulating barrier 3, fills inserts 4 between insulating barrier 3 and polypropylene embossing twining package tape 5, and at polypropylene embossing twining package tape 5 armoured steel bands or steel wire 6, restrictive coating 7 is extruded in outside steel band or the steel wire 6.

Claims

1. a lv power cable is characterized in that: comprise at least one core assembly line, inserts (4), twining package tape (5) and restrictive coating (7); Wherein, heart yearn comprises conductor lines (1), semi-conductive screen waterstop (2) and insulating barrier (3); The wrapped conductor lines of semi-conductive screen waterstop (2) (1), insulating barrier (3) are extruded in outside the semi-conductive screen waterstop (2); Twining package tape (5) is wrapped outside insulating barrier (3), fills inserts (4) between insulating barrier (3) and twining package tape (5), and restrictive coating (7) is extruded in outside the twining package tape (5).

2. lv power cable according to claim 1 is characterized in that: can armouring tape or steel wire between described twining package tape (5) and the restrictive coating (7).

3. lv power cable according to claim 1 is characterized in that: described twining package tape (5) employing polypropylene embossing twining package tape.

4. lv power cable according to claim 1 is characterized in that: described conductor lines (1) employing copper, aluminium or alloy conductor line.