CN201387756Y

CN201387756Y - Low-smoke halogen-free fireproof power cable with polyolefin insulation and polyolefin sheath

Info

Publication number: CN201387756Y
Application number: CN200920085315U
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 fireproof power cable with a polyolefin insulation and polyolefin sheath comprises a metal conductor (1) which adopts a mica tape wrapping (6). The power cable is characterized in that the outside of the mica tape wrapping (6) is coated by a nano-polyolefin insulation layer (2); the outside of the insulation layer (2) is coated by a halogen-free flame-retarding fiberglass oxygen isolation belt (3); and the external-most layer of the power cable is a low-smoke halogen-free polyolefin sheath layer (5). 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; the polyolefin sheath with the low-smoke and halogen-free performances leads the cable to have the performances of low smoke and no halogen; and simultaneously, the cable also adopts the halogen-free flame-retarding oxygen isolation belt so that the cable has the performances of oxygen isolation, flame retarding, low smoke and nontoxicity; and steel tape armoring can prevent animals and plants from damaging the cable and reinforce the wearability.

Description

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

Technical field

The utility model relates to power cable, is a kind of polyolefin insulation polyolefin jacket low smoke and zero halogen fireproof 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, the insulating barrier that an implied condition is arranged here is the conductor outsourcing can only bear 75 ℃ usually, the words that temperature surpasses the upper limit can cause the change on the insulating barrier generation performance, insulating reliability greatly reduces, 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.If simultaneously cable has good heat resistance, also to consider to catch fire in the higher occasion of security requirement and wait personal safety under the extreme case, cable only uses versatile material also not reach safety requirements at this moment.

Summary of the invention

The purpose of this utility model provides a kind of polyolefin insulation polyolefin jacket low smoke and zero halogen fireproof power cable that can improve the power cable current capacity and strengthen fire-resistant and low smoke and zero halogen performance.

Described polyolefin insulation polyolefin jacket low smoke and zero halogen fireproof power cable, the metallic conductor, insulating barrier, the restrictive coating that comprise the center, it is characterized in that: described metallic conductor adopts mica tape wrapped, clad nano polyolefin insulation layer outside mica tape is wrapped, also be surrounded by halogen-free flameproof oxygen barrier band outside insulating barrier, outermost layer adopts the low-smoke halogen-free polyolefin restrictive coating.

Between halogen-free flameproof oxygen barrier band and restrictive coating, also can use steel-tape armouring.

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 adopted halogen-free flameproof oxygen barrier band simultaneously, the polyolefin jacket that has the low smoke and zero halogen performance makes whole cable have the performance of low smoke and zero halogen, also have oxygen barrier, fire-retardant, low cigarette, nontoxic performance simultaneously, steel-tape armouring can prevent vegeto-animal destruction and strengthen abrasive resistance.

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-halogen-free flameproof oxygen barrier band, 4-steel-tape armouring, 5-restrictive coating, 6-mica twining package tape.

Embodiment

Below in conjunction with accompanying drawing the utility model is further specified: polyolefin insulation polyolefin jacket low smoke and zero halogen fireproof power cable as shown in Fig. 1,2, the metallic conductor 1, insulating barrier 2, the restrictive coating 5 that comprise the center, the insulating barrier 2 of this cable adopts nanometer polyolefin insulation material, outside insulating barrier 2, also be surrounded by halogen-free flameproof oxygen barrier band 3, restrictive coating 5 adopts the low-smoke halogen-free polyolefin sheath, and metallic conductor 1 adopts mica tape wrapped 6 simultaneously.

Between halogen-free flameproof oxygen barrier band 3 and restrictive coating 5, also can use steel-tape armouring 4, cable be strengthened prevent animals and plants destruction and abrasion resistance properties.

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 ℃, and the normally used insulating layer material heatproof upper limit only can reach 75 ℃ or 90 ℃.

Heat-resisting ability improves its current capacity of cable that is equivalent to same sectional area and is improved, and its cost of cable of same current capacity has obtained significantly reducing in other words, and security performance has obtained very big lifting.Excessive in conductor current, when making conductor temperature be elevated to 105 ℃, cable still is operated in the normal working temperature, and common cable carries same electric current and need use the long-pending conductor in heavy in section more, and cost of investment is raise.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.The polyolefin jacket that has the low smoke and zero halogen performance makes whole cable have the performance of low smoke and zero halogen, this cable has also adopted halogen-free flameproof oxygen barrier band simultaneously, make cable also have oxygen barrier, fire-retardant, low cigarette, nontoxic performance simultaneously, steel-tape armouring can prevent vegeto-animal destruction and strengthen abrasive resistance.

Claims

1. polyolefin insulation polyolefin jacket low smoke and zero halogen fireproof power cable, the metallic conductor, insulating barrier, the restrictive coating that comprise the center, it is characterized in that: described metallic conductor (1) adopts mica tape wrapped (6), clad nano polyolefin insulation layer (1) outside the mica tape wrapped (6), also be surrounded by halogen-free flameproof oxygen barrier band (3) outside insulating barrier (2), outermost layer adopts low-smoke halogen-free polyolefin restrictive coating (5).

2. polyolefin insulation polyolefin jacket low smoke and zero halogen fireproof power cable according to claim 1 is characterized in that: use steel-tape armouring (4) between halogen-free flameproof oxygen barrier band (3) and restrictive coating (5).

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