CN201387755Y

CN201387755Y - Low-smoke halogen-free temperature-resisting power cable with polyolefin insulation and polyolefin sheath

Info

Publication number: CN201387755Y
Application number: CN200920085314U
Authority: CN
Inventors: 罗海涛; 张市甫; 谭斌
Original assignee: Wuhan Xintiandi Special Cable Co Ltd
Current assignee: Wuhan Xintiandi Special Cable Co Ltd
Priority date: 2009-04-24
Filing date: 2009-04-24
Publication date: 2010-01-20
Anticipated expiration: 2019-04-24

Abstract

A low-smoke halogen-free temperature-resisting power cable with a polyolefin insulation and polyolefin sheath comprises a central metal conductor, an insulation layer, an oxygen isolation belt and a sheath layer. The power cable is characterized in that the outside of the metal conductor (1) is coated by a nano-polyolefin insulation layer (2); the outside of the insulation layer (2) is coated by a WLET halogen-free flame-retarding fiberglass oxygen isolation belt (4); and the external-most layer of the power cable is coated by a low-smoke halogen-free polyolefin sheath layer (6). In the utility model, the high temperature resistance capability of the cable is improved from normal 75 DEG C to 105 DEG C, which is equivalent to that the current-carrying capability of the cable with the same section area is improved, alternatively the cost of the cable with the same current-carrying capability is reduced greatly; and simultaneously, the environment-protective material with the characteristics of low smoke, no halogen, flame retarding and oxygen isolation is adopted, and the performances on environment protection and safety are improved greatly.

Description

Polyolefin insulation polyolefin jacket low smoke and zero halogen heatproof power cable

Technical field

The utility model relates to power cable, is a kind of polyolefin insulation polyolefin jacket low smoke and zero halogen heatproof power cable specifically.

Background technology

For power cable, its current capacity is only considered the sectional area of conductor thread core usually, this is because the electric current increase can make conductor temperature raise, and the insulating barrier that an implied condition is arranged here is the conductor outsourcing can only bear 75 ℃ usually, and good material can reach 90 ℃ or higher.The words that temperature surpasses the upper limit can cause the change on the insulating barrier generation performance, and insulating reliability greatly reduces, and higher temperature can cause insulating barrier emerge poisonous dense smoke even burning.This poisonous dense smoke is called halogen gas, is that power line burning back produces the principal element of fatal harm.

Summary of the invention

The purpose of this utility model provides a kind of polyolefin insulation polyolefin jacket low smoke and zero halogen heatproof power cable that can improve the power cable current capacity and have fire-retardant, low cigarette, oxygen barrier, nontoxic performance.

Described polyolefin insulation polyolefin jacket low smoke and zero halogen heatproof power cable, the metallic conductor, insulating barrier, oxygen barrier band, the restrictive coating that comprise the center, it is characterized in that: clad nano polyolefin insulation layer outside the described metallic conductor, insulating barrier coats WLET halogen-free flame-retardant glass fiber oxygen barrier band outward, and outermost layer coats the low-smoke halogen-free polyolefin restrictive coating.

Between described restrictive coating and oxygen barrier band, armouring tape is arranged.

Described metallic conductor can be copper, aluminium or copper-covered aluminum-core.

The utility model has improved the heat-resisting ability of cable, bring up to 105 ℃ by common 75 ℃, its current capacity of cable that is equivalent to same sectional area is improved, its cost of cable of same current capacity has obtained significantly reducing in other words, this cable has also all adopted the low smoke and zero halogen environment-friendly materials simultaneously, make cable have low cigarette, fire-retardant, oxygen barrier, avirulent characteristics, its environmental protection, security performance have all obtained very big lifting.

Description of drawings

Fig. 1 is the utility model embodiment one structural representation,

Fig. 2 is the utility model embodiment two structural representations.

Among the figure: 1-conductor, 2-insulating barrier, 3-oxygen barrier band, 4-armouring tape, 5-restrictive coating.

Embodiment

Below in conjunction with accompanying drawing the utility model is further specified: polyolefin insulation polyolefin jacket low smoke and zero halogen heatproof power cable as shown in Fig. 1,2, the metallic conductor 1, insulating barrier 2, oxygen barrier band 3, the restrictive coating 5 that comprise the center, clad nano polyolefin insulation layer 1 outside the described metallic conductor 1, the insulating barrier 1 outer WLET halogen-free flame-retardant glass fiber oxygen barrier band 4 that coats, outermost layer coats low-smoke halogen-free polyolefin restrictive coating 6.

As Fig. 2, between described restrictive coating 5 and oxygen barrier band 3, also armouring tape 4 can be housed.The cable of band armouring tape more can prevent that aspects such as animal baits, resistance to wears from playing a good protection.

Described metallic conductor 1 can be copper, aluminium or copper-covered aluminum-core.

Because insulating barrier 2 adopts nanometer polyolefin insulation material, its resistance to elevated temperatures rises to 105 ℃, also possesses the environmental-protecting performance of low smoke and zero halogen simultaneously.The nanometer polyolefin can replace the cross-linking radiation material, and possesses the low smoke and zero halogen performance, and the polyolefinic processing technology of nanometer is simple, has environmental-protecting performance, and material can reclaim repeated use.

And the normally used insulating layer material heatproof upper limit only can reach 75 ℃ or 90 ℃.Low-smoke halogen-free polyolefin sheath and halogen-free flameproof oxygen barrier band have low cigarette, Halogen, fire-retardant, oxygen barrier performance simultaneously.

Heat-resisting ability improves its current capacity of cable that is equivalent to same sectional area and is improved, its cost of cable of same current capacity has obtained significantly reducing in other words, this cable has also adopted low cigarette, Halogen, fire-retardant environment-friendly materials simultaneously, and its environmental protection, security performance have all obtained very big lifting.Excessive in conductor current, this product had low cigarette, Halogen and high flame retardant characteristic when temperature was too high.

Claims

1. polyolefin insulation polyolefin jacket low smoke and zero halogen heatproof power cable, the metallic conductor, insulating barrier, oxygen barrier band, the restrictive coating that comprise the center, it is characterized in that: clad nano polyolefin insulation layer (2) outside the described metallic conductor (1), the outer WLET halogen-free flame-retardant glass fiber oxygen barrier band (4) that coats of insulating barrier (2), outermost layer coats low-smoke halogen-free polyolefin restrictive coating (6).

2. polyolefin insulation polyolefin jacket low smoke and zero halogen heatproof power cable according to claim 1 is characterized in that: between described restrictive coating (5) and oxygen barrier band (3) armouring tape (4) is arranged.

3. polyolefin insulation polyolefin jacket low smoke and zero halogen heatproof power cable according to claim 1, it is characterized in that: described metallic conductor (1) can be copper, aluminium or copper-covered aluminum-core.