CN2658913Y

CN2658913Y - Water proof antimouse, fire resistant, low smoke, low bittern power cable

Info

Publication number: CN2658913Y
Application number: CN 03248655
Authority: CN
Inventors: 陈卫
Original assignee: TEBIAN ELECTROTECHNICAL CO Ltd XINJIANG
Current assignee: TEBIAN ELECTROTECHNICAL CO Ltd XINJIANG
Priority date: 2003-08-29
Filing date: 2003-08-29
Publication date: 2004-11-24
Anticipated expiration: 2013-08-29

Abstract

The utility model relates to a power cable that is damp-proof, rodent-resistant, with high fire retardant and low smoke and halogen, comprising a conductor, a conductor shielding layer, an insulation layer, an insulation shielding layer and a metal band shielding layer. A double-sided waterstop is provided between the insulation shielding layer and the metal band shielding layer. Filling rope and taped covering are provided outside the metal band shielding layer, and PE inner lining layer, metal armored layer and external sheath of low smoke and halogen are equipped orderly. The utility model is characterized in that it is damp-proof, with high fire retardant, low smoke and low halogen. The cable is armored with steel strap for mechanical protection, as well as rodent-resistance and termite resistance of cables.

Description

A kind of waterproof, protection against rodents, high flame retardant, low-smoke low-halogen power cable

Technical field

The utility model belongs to the power cable technical field, relates to a kind of have waterproof, protection against rodents, high flame retardant, low-smoke low-halogen power cable.

Background technology

General power cable only has fire resistance at present, or only has a water resistance, and complete not the having of various performances, because if the material that uses is improper, or construction of cable design imperfection, the phenomenon that every performance index condition each other generation, often make cable not reach that cable is actual to lay required environmental requirement, use in subway and the tunnel place of densely populated, moist and many ants, many mouse for cable especially, this just requires cable to have the performance of waterproof, protection against rodents, high flame retardant, low-smoke low-halogen.And general power cable structure is: be provided with insulation internal shield, insulating barrier, insulation screen, copper strips screen, waterproofing rope layer, the PVC sheath bed of material on the conductor successively, this kind structure one is to have only block-water performance, no high flame resistance, cable can not put out in fire certainly, has damaged the normal operation of cable; The 2nd, therefore the performance of no protection against rodents, anti-ant, low-smoke low-halogen at first makes cable often be bitten by mouse and ant, damages cable, and cable is broken down, and can not guarantee the normal operation of subway, tunnel, influences expanding economy; Secondly under the situation of catching fire, emit a large amount of toxic and harmfuls, jeopardize people's life security.

Summary of the invention

Technical problem to be solved in the utility model is at the special environment for use of cable, design technically provides a kind of waterproof, protection against rodents, anti-ant, high flame retardant, low-smoke low-halogen power cable, make this cable can use occasion in densely populated, moist and many ants, many mouse, low-smoke low-halogen high flame retardant, can be laid in the electric substation, in densely populated subway, tunnel and the station, can be installed on cable trough interlayer, interval high overhead wire, the cable tray, in the cable trough or the poling direct-burried.

Solve technical scheme that the utility model technical problem adopted and be this waterproof, protection against rodents, high flame retardant, low-smoke low-halogen power cable and comprise conductor, conductor shield, insulating barrier, insulation screen, metal tape screen, between insulation screen and metal tape screen, two-sided water blocking tape layer is arranged, the metal tape screen is outward gasket for packing and wrapped belt, and PE inner covering, metal armouring layer and low-smoke low-halogen outer jacket are arranged afterwards successively.Conductor in the cable insulation core is that round conductor, conductor shield are to be extruded in the outer cross-linking type semi-conductive layer of conductor, outside conductor screen, extrude crosslinked polyetylene insulated layer, outside insulating barrier, extrude crosslinked peelable release semi-conductive layer as insulation screen, outside insulation screen the two-sided waterstop of wrapped semiconductive as watertight composition, overlapping wrapped one deck soft copper band on watertight composition is as the metal tape screen.Form cable core then from conductor to the metal tape screen, make many cable core strandings, dose filling between cable core, the filling employing of cable has non-hygroscopic combustion-proof glass fiber gasket for packing and closely fills.The working temperature of this packing material and cable adapts, and insulating material is not had adverse effect, profile rounding behind the cable core stranding; The outer wrapped low smoke, zero halogen high flame retardant glass fiber tape that has of cable core, the PE inner covering is the inner covering that extrudes outside wrapped belt, its material is a poly-ethylene cable material, the working temperature of inner covering material and cable adapts, simultaneously insulating material there is not adverse effect, play a protective role, the polyethylene liner layer has the function of vertical waterproof simultaneously; Wrapped armouring tape outside internal layer, adopt two wrapped armours of steel band clearance-type to meet the requirement of GB2952, form armour, outside armour, extrude the outer jacket of one deck cable then, outer jacket adopts black low-smoke low-halogen polyolefin flame-retardant sheath material, the sheath nominal thickness meets the regulation of GB2952, and sheath material has good anti-Japanese photograph, anti-ultraviolet aging performance.

Advantage of the present utility model is: 1, cable has waterproof, humidity resistance, and its performance can satisfy: cable sample soaks 72 hours in water after, behind the composite bed of removal insulating barrier outside, detect by an unaided eye surface of insulating layer drying, no moisture; 2, the fire resistance the during burning of cable can satisfy the category-A bunched cables burning test of GB12666.5-90 regulation, is more than 815 ℃ for fire time 40min, flame temperature, and burning back carbonization partial-length is not more than 2.5 meters; 3, low smoke performance during cable fire, it can satisfy: under the experimental condition of IEC61034 (1997) regulation, its minimum light transmittance of smoke density that burning produces is not less than 35%; 4, low halogen performance during cable fire, its performance can satisfy under the experimental condition of IEC6754 (1994) regulation, and the halogen acid gas escaped quantity that burning produces is not more than 100mg/g.5, the pH value of gas and conductivity test are pressed IEC754-2 (1991) regulation during cable fire, and pH value is not less than 2.5, conductance is not more than 30us/mm; 6, this cable adopts steel-tape armouring, and this steel band not only shields in mechanical aspects to cable, has protection against rodents simultaneously, anti-ant effect.

Description of drawings

Fig. 1 is the utility model cross-sectional view

Among the figure: the wrapped belt 9-of 1-compact conductor 2-conductor shield 3-crosslinked polyetylene insulated layer 4-insulation screen 5-two-sided water blocking tape layer 6-copper strips screen 7-glass fibre gasket for packing 8-glass fibre polyethylene liner layer 10-steel-tape armouring layer 11-low-smoke low-halogen oversheath

Embodiment

Design one this kind cable is 12/20kV, 3 * 240 crosslinked polyetylene insulated waterproof, protection against rodents, high flame retardant, low-smoke low-halogen power cable, its insulated wire cores center is a conductor 1, conductor 1 is to press circular conductor by the multiply single round copper wire is stranded, it presses coefficient and is not less than 0.90, the employing drawing-die is produced, smooth, the no greasy dirt of conductive surface, burr; Conductor 1 is coating conductor semiconductive shielding layer 2 successively outwards, crosslinked polyetylene insulated layer 3 and insulation semiconductive shielding layer 4, the cross-linking type semi-conductive layer of conductor shield 2 for extruding, semi-conductive layer 2 is extruded on the conductor equably, smooth surface, do not have tangible twisted wire wedge angle, particle, burn or abrasive vestige, conductor shield 2 thickness are 0.6mm; Insulating barrier 3 is crosslinked polyetylene insulated layer, extrudes closely, and is peelable, surfacing, and the thickness nominal thickness is 5.5mm; The crosslinked peelable release semi-conductive layer of insulation screen 4 for extruding, on the insulating surface that semi-conductive layer coats equably, smooth surface does not have wedge angle, particle, burns or abrasive vestige, and insulation shielding thickness is 0.8mm; Conductor shield 2, insulating barrier 3, insulation screen 4 adopt dry type, three-layer co-extruded mode to make.

The insulated wire cores insulation screen is provided with waterproof layer material outward, is the two-sided water blocking tape layer 5 of semiconductive, and waterstop is uniformly overlapping wrapped outside insulation screen 4, and waterstop thickness is not less than 0.30mm, and twining package tape is wrapped smooth, puts up evenly, and band does not have breakage, loose.Be provided with metal screen layer 6 outside the water blocking tape layer 5, be made up of overlapping wrapped one deck soft copper band, copper strips thickness is not less than 0.10mm, and metal screen layer 6 sectional areas are not less than 35mm ², metal screen layer 6 is wrapped outside water blocking layer 5, and the wrapped rounding of copper strips is smooth, welding manner is adopted in the copper strips continued access, and satisfies the short circuit temperature requirement, has between watertight composition and the metal screen layer along insulated wire cores phase-splitting tracer stripe longitudinally, copper strips is wrapped smooth, puts up evenly, and copper strips does not have breakage, loose.

The whole one-tenth cable core of having formed of above process, get three and become cable core, twisted together by strand to the direction that is dextrad, be added with the gasket for packing 7 of cable in the gap between three cores, gasket for packing 7 employings have non-hygroscopic combustion-proof glass fiber gasket for packing 7 and closely fill, the working temperature of this packing material and cable adapts, and insulating material is not had adverse effect, external form rounding behind the cable core stranding; Adopt twining package tape 8 to tighten when adding the filling stranding, twining package tape uses low smoke, zero halogen high flame retardant glass fiber tape, and wrapped mode is the bilateral clearance formula.

With the wrapped belt 8 outer inner coverings 9 that extrude, the material of inner covering 9 is for extruding type high density polyethylene (HDPE) protective cover material, the thickness of inner covering meets the regulation of GB12706, the working temperature of inner covering material and cable adapts, simultaneously insulating material is not had adverse effect, the high density polyethylene (HDPE) inner covering has the radially function of waterproof; Be provided with armour 10 outside inner covering 9, armour 10 meets the requirement of GB2952, and steel-tape armouring layer 10 adopts two steel band gaps wrapped, and steel band is wrapped smooth tight, and it is smooth firmly that steel band connects welding; Be provided with the oversheath 11 of cable outside armature of cable layer 10, oversheath adopts black low-smoke low-halogen polyolefin flame-retardant sheath material, and the sheath nominal thickness meets the regulation of GB2952, and sheath material has good anti-Japanese photograph, ultraviolet ray ageing performance.

Claims

1, a kind of waterproof, protection against rodents, high flame retardant, low-smoke low-halogen power cable, comprise conductor, conductor shield, insulating barrier, insulation screen, metal tape screen, it is characterized in that between insulation screen and metal tape screen, two-sided water blocking tape layer being arranged, the metal tape screen is outward gasket for packing and wrapped belt, and PE inner covering, metal armouring layer and low-smoke low-halogen oversheath are arranged afterwards successively.

2, waterproof according to claim 1, protection against rodents, high flame retardant, low-smoke low-halogen power cable, it is characterized in that formation cable core from conductor to the metal tape screen, make many cable core strandings, dose filling between cable core, the filling employing of cable has non-hygroscopic combustion-proof glass fiber gasket for packing and closely fills.

3, waterproof according to claim 1 and 2, protection against rodents, high flame retardant, low-smoke low-halogen power cable is characterized in that the wrapped employing low smoke, zero halogen of stranding high flame retardant glass fiber tape.

4, waterproof according to claim 1 and 2, protection against rodents, high flame retardant, low-smoke low-halogen power cable is characterized in that the PE inner covering is the inner covering that extrudes outside wrapped belt, its material is a poly-ethylene cable material.

5, waterproof according to claim 1 and 2, protection against rodents, high flame retardant, low-smoke low-halogen power cable is characterized in that the metal armouring layer adopts two wrapped armours of steel band clearance-type.

6, waterproof according to claim 1 and 2, protection against rodents, high flame retardant, low-smoke low-halogen power cable is characterized in that the cross-linking type semi-conductive layer of conductor shield (2) for extruding.

7, waterproof according to claim 1 and 2, protection against rodents, high flame retardant, low-smoke low-halogen power cable is characterized in that insulating barrier (3) for crosslinked polyetylene insulated layer, extrudes closely.

8, waterproof according to claim 1 and 2, protection against rodents, high flame retardant, low-smoke low-halogen power cable, it is characterized in that water blocking tape layer is the two-sided waterstop of semiconductive (5), waterstop is uniformly overlapping wrapped outside insulation screen (4), and water blocking tape layer thickness is not less than 0.30mm.

9, waterproof according to claim 1 and 2, protection against rodents, high flame retardant, low-smoke low-halogen power cable is characterized in that metal screen layer (6) is made up of overlapping wrapped one deck soft copper band, and copper strips thickness is not less than 0.10mm.

10, waterproof according to claim 1 and 2, protection against rodents, high flame retardant, low-smoke low-halogen power cable is characterized in that oversheath (11) adopts black low-smoke low-halogen polyolefin flame-retardant sheath material.