CN205881552U - Waterproof temperature resistant power cable of direct burial suitable for severe cold district - Google Patents

Abstract

The utility model relates to a waterproof temperature resistant power cable of direct burial suitable for severe cold district, this cable from interior to exterior is in proper order by the conductor, an insulating layer, the filler, the cold -resistant area that blocks water, an armoring layer, aluminium is flat, the ceramic fibre area of weaving, PP area and WDZ do not have steamed low cigarette oversheath and constitute, the utilization separates the oxygen layer around the cold -resistant substituting traditional crowded package in area that blocks water of package, the surplus that separates oxygen layer longitudinal extension has been increased, the ability that adapts to high and cold environment has been improved by a wide margin, utilize flat armor in the aluminium to replace traditional round steel wire armoring layer, self weight of the cable that by a wide margin reduces. Simultaneously, flat armoured cable pliability in the aluminium is better than steel wire armoured cable, and bend radius is littleer, and the severe cold district of being convenient for lays the construction, between restrictive coating and armor, increased ceramic fibre weaving lacing and PP lacing, improved the heat preservation water -proof effects of cable, prevent to separate oxygen layer fracture, strengthened keeping warm and waterproof performance, guaranteed the normal operating of product under the damaged state of sheath. Reinforce the adaptive capacity to environment of cable, prolonged life by a wide margin.

Description

A kind of direct burial waterproof heatproof power cable being applicable to extremely frigid zones

Technical field

This utility model relates to a kind of direct burial waterproof heatproof power cable being applicable to extremely frigid zones, belongs to power transmission Material, particularly relates to one and is applicable to the extremely frigid zones buried power cable of engineer operation special straight.

Background technology

In a lot of capital construction job site, cold area in north, because of the multiformity of mounting and installation construction condition, Or the reasons such as mounting means is unreasonable cause cable sheath to occur damaging and being not easy to find, thus cause cable water inlet, be subject to Tide, causes product to reduce service life, makes production and life be affected.And, existing direct-buried cable technology is mostly general The cable of logical armouring, owing to common oxygen barrier layer is original to extrude oxygen barrier layer, because of weather and the factor of environment, easily at high dry frozen ground In earth, stress causes the cracking of oxygen barrier layer and outer jacket；Armored cable mostly is round steel wire/aluminium wire armoured cable, and cable is conducted oneself with dignity relatively Greatly, bending radius is relatively big, is unfavorable for that direct-burried is constructed；Owing to common cable cold-proof heat insulation performance is not strong, simultaneously at protective coverings of cable After damage, easily intake or make moist and cause corrosion, affect the operation safety of cable and normal use；Traditional cable outer jacket is crowded Bag PVC/PE sheath, easily ftractures in the environment of cold, significantly reduces the service life of cable.

Summary of the invention

This utility model purpose is, the defect existed for prior art, it is provided that a kind of be applicable to the straight of extremely frigid zones Buried waterproof heatproof power cable, this cable is the most successively by conductor, insulating barrier, implant, cold-resistant waterstop, armouring Layer, aluminum flat bar, ceramic fiber spun band, PP band and WDZ low smoke, zero halogen oversheath composition, utilize wrapped cold-resistant waterstop to substitute and pass That unites extrudes oxygen barrier layer, adds the surplus of oxygen barrier layer longitudinal extension, and the ability that adapt to psychro-environment is greatly improved, it is to avoid Oxygen barrier layer ftractures；Aluminum flat bar armor is utilized to substitute traditional round steel wire armor, the weight of self of the cable being greatly reduced. Meanwhile, aluminum flat bar armored cable pliability is more preferable than steel wire armored cable, and bending radius is less, it is simple to extremely frigid zones lays to be executed Work；Between restrictive coating and armor, add ceramic fiber spun belt and PP belt, improve the thermal-insulating waterproof effect of cable Really, prevent oxygen barrier layer from ftractureing, prevent oversheath from scratching the corrosion of the armouring caused in work progress simultaneously, enhance insulation and Water resistance, it is ensured that properly functioning under sheath breakage state of product.Enhance the adaptive capacity to environment of cable, significantly prolong Grow service life.

A kind of direct burial waterproof heatproof power cable being applicable to extremely frigid zones described in the utility model, this cable is by interior To outer the most successively by conductor, insulating barrier, implant, cold-resistant waterstop, armor, aluminum flat bar, ceramic fiber spun band, PP band and WDZ low smoke, zero halogen oversheath forms, and is provided with by double-layered cold-resistant between the insulating barrier (2) and armor (5) of conductor (1) outer layer The overlapping wrapped waterproof layer of waterstop (4)；Described armor (5) is made up of aluminum flat bar (6) close-packed arrays；In armor (5) Outer utilize ceramic fiber spun band (7) to carry out wrapped, re-use outside ceramic fiber spun band (7) PP band (8) carry out overlapping around Bag, protective coverings of cable uses WDZ low smoke, zero halogen oversheath (9) to extrude.

Accompanying drawing explanation

Fig. 1 is cross section structure schematic diagram of the present utility model.

Legend:

1, conductor, 2, insulating barrier, 3, implant, 4, cold-resistant waterstop, 5, armor, 6, aluminum flat bar, 7, ceramic fibre spins Ribbon, 8, PP band, 9, WDZ low smoke, zero halogen oversheath.

Detailed description of the invention

Further describe and provide embodiment below in conjunction with accompanying drawing:

This utility model is not limited by following embodiment, can come with practical situation according to the technical solution of the utility model Determine specific embodiment.

A kind of direct burial waterproof heatproof power cable being applicable to extremely frigid zones described in the utility model, this cable is by interior To outer the most successively by conductor, insulating barrier, implant, cold-resistant waterstop, armor, aluminum flat bar, ceramic fiber spun band, PP band and WDZ low smoke, zero halogen oversheath forms, and is provided with by double-layered cold-resistant waterstop between the insulating barrier 2 and armor 5 of conductor 1 outer layer 4 overlapping wrapped waterproof layers；Described armor 5 is made up of pull resistance and pliability more preferable aluminum flat bar 6 close-packed arrays；At armour Heat insulation and that antiseptic property is excellent ceramic fiber spun band 7 is utilized to carry out wrapped outside dress layer 5, outer again at ceramic fiber spun band 7 The PP band 8 using water resistance excellent carries out overlapping wrapped, and protective coverings of cable uses WDZ low smoke, zero halogen oversheath 9 to extrude.

As it is shown in figure 1, conductor 1 can be selected for two class stranded conductors, to improve the adaptation ability of extremely frigid zones conductor current-carrying；? Being provided with implant 3 between the core insulating barrier 2 of conductor 1, play the effect of isolation between core, implant 3 uses tearable Netted polypropylene gasket for packing is as packing material；After cable cabling, use double-layered cold-resistant waterstop 4 wrapped, can significantly carry High electricity oxygen barrier is layer by layer in longitudinal and radial direction flexible surplus, it is to avoid because of the variations in temperature in external environment condition and soil, cause oxygen barrier Violent the expanding with heat and contract with cold of layer, causes the phenomenon that oxygen barrier layer ftractures occur；Meanwhile, use double-layered cold-resistant waterstop 4 wrapped all right Strengthening cable adapts to the ability of environmental change；Armor 5 utilizes aluminum flat bar 6 close-packed arrays armouring, reduces cable deadweight, simultaneously Improve the pliability of cable, reduce the bending radius of cable, it is simple to cable is at the field cable laying operation of extremely frigid zones；At armouring Outside layer 5, utilize wrapped double-layer ceramic fibrous woven band 7 as heat-insulation layer, utilize its low heat conductivity and excellent heat-proof quality, increase The strong heat insulation effect of cable, prevents too low run cable of ambient temperature from impacting；Meanwhile, its excellent electricity is utilized Insulating properties, and the strongest antiacid, oily, the corrosive nature of steam, be conducive to that armor is carried out oxygen barrier and block water, prevent sheath Rupture and corrode armor into water, affect cable service life；Between ceramic fiber spun band 7 and oversheath increase PP band 8 around Covering is conducive to strengthening further the waterproof effect of cable, protects ceramic fiber spun band 7, at the same time it can also be to electricity The profile of cable plays the effect of boundling, makes cable the loosest；Protective coverings of cable uses low temperature resistant WDZ low smoke, zero halogen oversheath 9 Extruding, temperature-40 DEG C does not ftractures, and weather resistance and UV resistant performance improve, higher than traditional cable is suitable for Cold weather and environment, further improve the service life of cable.

Above technical characteristic constitutes most preferred embodiment of the present utility model, and it has stronger adaptability and optimal enforcement Effect.

Claims (1)

1. the direct burial waterproof heatproof power cable being applicable to extremely frigid zones, it is characterised in that this cable is the most successively Low by conductor, insulating barrier, implant, cold-resistant waterstop, armor, aluminum flat bar, ceramic fiber spun band, PP band and WDZ Halogen Cigarette oversheath forms, and is provided with by double-layered cold-resistant waterstop (4) between the insulating barrier (2) and armor (5) of conductor (1) outer layer Overlapping wrapped waterproof layer；Described armor (5) is made up of aluminum flat bar (6) close-packed arrays；Pottery is utilized outward at armor (5) Fibrous woven band (7) carries out wrapped, re-uses PP band (8) and carries out overlapping wrapped, protect outside cable outside ceramic fiber spun band (7) Layer uses WDZ low smoke, zero halogen oversheath (9) to extrude.