CN2629179Y

CN2629179Y - Low-smake and low-halogen flame resistant, waterproof and anti biting armoured layer cable

Info

Publication number: CN2629179Y
Application number: CN 03258100
Authority: CN
Inventors: 张令宜; 姚剑; 李侃
Original assignee: BIRUILI TIANJIN ELECTRIC CABLE Co Ltd
Current assignee: BIRUILI TIANJIN ELECTRIC CABLE Co Ltd
Priority date: 2003-07-21
Filing date: 2003-07-21
Publication date: 2004-07-28
Anticipated expiration: 2013-07-21

Abstract

The utility model provides a cable which has low-smoke, low-halogen and gopher protected armored layer. The utility model comprises a conductor, a conductor shielding layer, an insulating layer, an insulating shielding layer, a metal shielding layer and a sheath, wherein a waterproof layer is arranged between the insulating shielding layer and the metal shielding layer; an inner liner, an armored layer and a blanket are arranged between the metal shielding layer and the sheath layer successively. The utility model has the characteristics of low smoke, low halogen, class-A flame retardant property, waterproof and gopher protected performance; and the materials can be saved, the production cost can be reduced, the diameter size of the cable can be cut short, the weight of the cable can be lightened, moreover, the construction and installation are convenient, the use is safe and reliable, and the life time is long.

Description

Have low smoke and low halogen waterproof and the anti-cable of stinging armour

Technical field

The utility model relates to power cable, relates in particular to a kind of have low smoke and low halogen waterproof and the anti-cable of stinging armour.

Background technology

Pressure, the single-core crosslinked polyethylene-insulated power cable of high pressure in existing, be difficult to satisfy simultaneously that the low-smoke low-halogen category-A is fire-retardant, waterproof and anti-performance of stinging, particularly single-core cable anti-stings measure, general adopt be mostly wrapped stainless steel band, its shortcoming is that the stainless steel belt is thicker, the cost height increases the external diameter of cable and weight, has therefore limited the length of cable.

Summary of the invention

In order to overcome the above-mentioned defective that existing cable exists, the utility model provides a kind of have low smoke and low halogen waterproof and the anti-cable of stinging armour, it not only has low-smoke low-halogen, category-A fire resistance, the anti-characteristics of stinging of waterproof, and can save material, reduce cost, can also reduce the outside dimension of cable, alleviate cable weight, be convenient to construction and installation, safe and reliable and the life-span is long.

The technical scheme that its technical problem that solves the utility model adopts is:

The utlity model has low smoke and low halogen waterproof and the anti-cable of stinging armour, comprise conductor, conductor shield, insulating barrier, insulation screen, metal screen layer and oversheath; It is characterized in that, be equipped with watertight composition between described insulation screen and the metal screen layer; Be equipped with inner covering, armour, oxygen barrier layer between described metal screen layer and the external sheath layer successively.

Aforesaid have low smoke and low halogen waterproof and an anti-cable of stinging armour, wherein the watertight composition semiconductive waterstop of lap wound bag of attaching most importance to.

Aforesaid have low smoke and low halogen waterproof and an anti-cable of stinging armour, and wherein inner covering adopts the polythene material with water proof fire retardant performance to extrude to be molded on the metal screen layer.

Aforesaid have low smoke and low halogen waterproof and an anti-cable of stinging armour, and wherein the armour lap wound of attaching most importance to wraps in one deck nonmagnetic material band on the inner covering.

The aforesaid cable that has the low smoke and low halogen waterproof and prevent stinging armour, wherein oxygen barrier layer adopts wrapped being molded on the armour of Halogen band material with high oxygen barrier fire resistance.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the utility model cable cross-sectional configuration schematic diagram.

Number in the figure explanation: 1 conductor, 2 conductor shields, 3XLPE insulating barrier, 4 insulation screens, 5 watertight compositions, 6 metal screen layers, 7 inner coverings, 8 armours, 9 oxygen barrier layers, external sheath layer 10.

Embodiment

Consult shown in Figure 1ly, the utlity model has low smoke and low halogen waterproof and the anti-cable of stinging armour, comprise conductor 1, conductor shield 2, XLPE insulating barrier 3, insulation screen 4, metal screen layer 6, external sheath layer 10; Be equipped with watertight composition 5 between insulation screen 4 and the metal screen layer 6; Be equipped with inner covering 7, armour 8 between metal screen layer 6 and the external sheath layer 10 successively, oxygen barrier layer 9; Wherein, the attach most importance to semiconductive waterstop of lap wound bag of watertight composition, waterstop thickness is more than the 0.3mm, waterstop is the commercially available prod; Inner covering 7 adopts the polythene material with water proof fire retardant performance to extrude and is molded on the metal screen layer 6; Armour 8 lap wound of attaching most importance to wraps in one deck nonmagnetic material band on the inner covering 7, and this metal material band is the alloy copper strips; Oxygen barrier layer 9 adopts wrapped being molded on the armour 8 of Halogen band material with high oxygen barrier fire resistance.

The utlity model has the low smoke and low halogen waterproof and reach when preventing stinging the cable preparation of armour, adopt the stranded conductor 1 that presses into of the circular copper cash of multiply, press coefficient and be not less than 0.90, performance and outward appearance meet the regulation of GB/T3956-1997 standard; Employing extrudes technology and coat one deck cross-linking type semi-conductive layer equably on conductor, and this semi-conductive layer is a conductor shield 2, and the thickness of this conductor shield 2 is 0.8mm; The material of insulating barrier 3 is cross-linking polyethylene materials (an XLPE type), and its performance meets IEC60502-2 (1997) standard, and the thickness of the thinnest point of insulating barrier is not less than the 90%-0.1mm of nominal value, and the insulation eccentricity degree is less than 8%; Insulation screen 4 is for extruding the semi-conductive layer of moulding, and this semi-conductive layer is coated on insulating barrier 3 surfaces equably, and the thickness of insulation screen 4 is 0.8mm; Conductor screen 2, insulating barrier 3, insulation screen 4 all adopt Finland NOKIA dry type, three-layer co-extruded mode to produce, and the insulation eccentricity degree is higher than relevant GB requirement; Adopt commercially available waterstop overlapping wrapped moulding watertight composition 5 on insulating barrier 3, this watertight composition 5 lap wound bag one layer thickness of attaching most importance to is the semiconductive waterstop of 0.3mm; Metal screen layer 6 is for adopting overlapping wrapped soft copper band, and the nominal cross of soft copper band satisfies the fault current capacities requirement, and nominal thickness is selected 0.12mm, and width is 45mm; Employing has radially that the polythene material of waterproof action and fire resistance extrudes forming internal liner layer 7 on metal screen layer 6, and its thickness is that thickness is 1 * 150mm ²: 1.4mm, 1 * 400mm ²: 1.6mm; Armour 8 lap wound of attaching most importance to wraps in one deck nonmagnetic material band on the inner covering 7, and the metal material band is commercially available brass band, and thickness is 0.12mm; Oxygen barrier layer 9 adopts wrapped being molded on the armour 8 of Halogen band material with fire resistance, and thickness is 0.17mm; Adopt at last have the antiultraviolet ageing properties, low cigarette, low halogen, fire-retardant material be as sheath material, present embodiment adopts the low smoke and low halogen material to extrude the moulding external sheath layer, nominal thickness is 1 * 150mm ²: 2.5mm, 1 * 400mm ²: 2.9mm, the thinnest dot thickness is not less than the 80%-0.2mm of nominal value, makes the cable finished product.

Of the present utility model have low smoke and low halogen waterproof and an anti-cable of stinging armour, has that the low-smoke low-halogen category-A is fire-retardant, waterproof and dampproof, a function of antiultraviolet, mouse bite preventing.This cable sample soaks 72 hours in water after, behind the composite bed of removal insulating barrier outside, detect by an unaided eye, the insulating barrier outer surface is still dry; Fire resistance during cable fire satisfies the category-A bunched cables testing vertical flammability of GB12666.5-90 regulation; Low smoke performance during cable fire can satisfy under the experimental condition of IEC61034 (1997) regulation, and its minimum light transmittance of the smoke density that produces during burning is not less than 30%; Low halogen performance during cable fire satisfies under the experimental condition of IEC754-1 (1994) regulation, and the halogen acid gas escaped quantity that produces during burning is not more than 100mg/g; The pH value of emergent gas and conductivity test are pressed IEC754-2 (1991) regulation during cable fire, and pH value is not less than 2.5, and conductance is not more than 30 μ s/mm; And the structure with brass band protection against rodents armouring prevents biting of mouse.

The above, it only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, every foundation technical spirit of the present utility model all still belongs in the scope of technical solutions of the utility model any simple modification, equivalent variations and modification that above embodiment did.

Claims

1, a kind of cable that has the low smoke and low halogen waterproof and prevent stinging armour comprises conductor, conductor shield, insulating barrier, insulation screen, metal screen layer and oversheath; It is characterized in that, be equipped with watertight composition between described insulation screen and the metal screen layer; Be equipped with inner covering, armour, oxygen barrier layer between described metal screen layer and the external sheath layer successively.

2, according to claim 1 have low smoke and low halogen waterproof and an anti-cable of stinging armour, it is characterized in that the attach most importance to semiconductive waterstop of lap wound bag of described watertight composition.

3, the cable that has the low smoke and low halogen waterproof and prevent stinging armour according to claim 1 is characterized in that, described inner covering adopts the polythene material with water proof fire retardant performance to extrude and is molded on the belting layer.

4, according to claim 1 have low smoke and low halogen waterproof and an anti-cable of stinging armour, it is characterized in that, the described armour lap wound of attaching most importance to wraps in one deck nonmagnetic material band on the inner covering.

5, the cable that has the low smoke and low halogen waterproof and prevent stinging armour according to claim 1 is characterized in that described oxygen barrier layer adopts wrapped being molded on the armour of Halogen band material with high oxygen barrier fire resistance.