CN106448842A

CN106448842A - Insulating aerial cable made from coreless material

Info

Publication number: CN106448842A
Application number: CN201610990318.8A
Authority: CN
Inventors: 过冬
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-11-10
Filing date: 2016-11-10
Publication date: 2017-02-22

Abstract

The invention discloses an insulating aerial cable made from a coreless material. An aluminum wire is served as a conductive material; an insulating material is coated on the outer layer of the conductive material; the insulating material is divided into two layers around the conductive material; the inner layer is made from the insulating material; 5-15% of graphene/carbon compound fiber is doped into the outer layer. According to the invention, the graphene/carbon compound fiber is doped into the outer layer of the insulating material, so that the insulating layer has the functions of insulating and bearing tension, the insulating aerial cable is free from core material, and the defects, including heating, power loss resulted from resistance increasing, and the like, brought by the core material all can be overcome.

Description

One kind no core insulated aerial cable

Technical field

The present invention relates to power transmission technical field, more particularly, to one kind no core insulated aerial cable.

Background technology

At present, with the startup of the carrying out in a deep going way of the upgrading of rural power grids, urban network restructuring, 10kV cable is with its construction dimension for 10kV cable Shield is convenient, power supply reliability is high, is increasingly widely applied in the change of rural power grids case, city net distribution line.

Because 10kV needs to cross over the barriers such as local-style dwelling houses, grove, for safety reasons, its outer end coated insulation material, to ensure Personal security, reduces accidental short circuit and causes fire.Meanwhile, in rural power grids and city netting twine road wide variety of aluminium conductor overhead insulating electricity Cable, due to the low intensity of aluminum, it usually needs improve the intensity of power transmission aluminum stranded wire with reinforced core, the reinforcement material beginning with Mainly common steel strand wires, for example typical steel-cored aluminium strand, stranded and make by aluminum steel and steel wire, center steel wire plays load Effect, outer layer aluminum steel plays current-carrying effect.

Develop through continuous, current armature stockline kind include galvanizing steel wire (pure zinc plating or zinc -5% aluminium-rare-earth Galfan alloy), Hot Dipped Galfan Alloy high intensity invar (INVAR-Fe-5%Ni) line, aluminum bag invar line, carbon fiber strengthen The compound line feeder of line, carbon fiber and polymer, aluminum-clad steel wire, hot-dip aluminizing steel wire, Bezinal galvanized steel wire etc..

But, steel core can not play due effect to aluminum cable steel reinforced aerial insulated cable in use, because When laying, fixture is to be clipped in outside insulation, is not to be directly sandwiched on steel core, so the effect that steel core bears pulling force is weakened.Especially It is the joint of steel core, due to the steel core bag heart in the cable, more not good connection method.

Therefore how to solve aluminium conductor aerial insulated cable intensity, lay effect with improve aerial insulated cable, be this The difficult problem that field is faced.

Content of the invention

It is an object of the invention to proposing a kind of insulated aerial cable, using the teaching of the invention it is possible to provide higher intensity and less circuit damage Consumption.

For reaching this purpose, the present invention employs the following technical solutions：

One kind no core insulated aerial cable, it adopts aluminum steel as conductive material, and outer layer of conductive material is coated with insulation Material, described insulant is divided into 2 layers centered on conductive material, and internal layer is insulant, and outer layer is doped with 5-15%'s Graphene/carbon composite fibre.

Preferably, described insulated aerial cable, is 10kV insulated aerial cable.

The centreless insulated aerial cable of the present invention, cancels the middle core playing booster action, and insulating barrier internal layer is pure exhausted Edge material, therefore its insulating properties are guaranteed.The outer layer of insulant is doped into what graphene fiber and carbon fiber were compounded to form Composite fibre, is higher than at least more than 50 times of steel because this composite fibre possesses tensile strength, simultaneously sufficiently flexible, does not change electricity The permission bending radius of cable.And in the erection process of cable, fixture is to be clipped in outside insulating barrier, therefore described insulating outer layer is straight Connect and bear pulling force, compared to the aluminum stranded conductor of setting core, it bears pulling force directly, and therefore performance is improved.

Meanwhile, the described insulant of the present invention simultaneously works as the effect of pulling force of insulating, bear, therefore insulated aerial cable Core can be canceled, the heating that core brings, resistance increase cause the defects such as power consumption, are overcome in the lump.

Graphene is material the thinnest, is also material the most tough, its tensile strength measurements in 1060Gpa, than Taller 200 times of best steel.It has good elasticity again simultaneously, and stretch range can reach the 20% of own dimensions.It is Current nature is the thinnest, intensity highest material.Therefore adopt graphene fiber as line feeder, can not only improve built on stilts defeated The intensity of electric wire, simultaneously because itself is light compared to metal, under same volume, can be greatly decreased own wt, therefore can between Connect the load reducing aerial line.

But because the current fibre length of Graphene is shorter, price is higher, therefore with carbon fiber compound use.Carbon fiber is one Plant high intensity more than 95% for the phosphorus content, the new fiber materials of high modulus fibre.It is organic by flake graphite crystallite etc. Fiber is piled up along fiber axial direction and is formed, through micro crystal graphite material obtained from carbonization and graphitization processing.Carbon fiber stretches Intensity is about 2 and arrives 7GPa, and stretch moduluses are about 200 and arrive 700Gpa, and about 1.5 to 2.0 grams of density is per cubic centimeter.

Compound by graphene fiber and carbon fiber, described graphene fiber is known skill with the complex method of carbon fiber Art, those skilled in the art can require and working condition, unrestricted choice according to concrete technology, and the present invention repeats no more.

Graphene fiber and the compositely proportional of carbon fiber, by volume, graphene fiber:Carbon fiber is 2:1～1:3, from Current cost consideration, preferably 1:2.

Preferably, outer layer is doped with the graphene/carbon composite fibre of 7-12%, preferably 8-10%.

The insulant that the no core insulation processing cable of the present invention adopts is any of material in this area, for example, select With vinylite, including crosslinked polyethylene, linear low density polyethylene (LLDPE)/Low Density Polyethylene (LDPE)/(ethylene/ Vinyl acetate) copolymer (E/VAC), the system such as E/VAC, LDPE/ (E/VAC).

The graphene/carbon fiber composite of the present invention mixes insulant and goes out layer so that insulating barrier simultaneously works as absolutely Edge, bear the effect of pulling force, therefore insulated aerial cable can cancel core, and the heating that core brings, resistance increase cause The defects such as power consumption, are overcome in the lump.

Specific embodiment

Embodiment 1

It adopts aluminum steel as conductive material, and outer layer of conductive material is coated with insulant, and described insulant is with conduction It is divided into 2 layers, internal layer is insulant, and outer layer is the graphene/carbon composite fibre doped with 5%, its compound ratio centered on material Example is 1:2.

Embodiment 2

It adopts aluminum steel as conductive material, and outer layer of conductive material is coated with insulant, and described insulant is with conduction It is divided into 2 layers, internal layer is insulant, and outer layer is the graphene/carbon composite fibre doped with 10%, its compound ratio centered on material Example is 2:1.

Embodiment 3

It adopts aluminum steel as conductive material, and outer layer of conductive material is coated with insulant, and described insulant is with conduction It is divided into 2 layers, internal layer is insulant, and outer layer is the graphene/carbon composite fibre doped with 15%, its compound ratio centered on material Example is 1:3.

Verification experimental verification shows, the structure of embodiment 1-3 is so that the tensile strength ratio of this no core insulated aerial cable is traditional Steel-cored aluminium strand exceeds at least 2 times, but after it dispenses core, the transmission energy loss that core causes, also it is reduced.

Claims

1. one kind no core insulated aerial cable, it adopts aluminum steel as conductive material, and outer layer of conductive material is coated with insulation material Material, described insulant is divided into 2 layers centered on conductive material, and internal layer is insulant, and outer layer is the stone doped with 5-15% Black alkene/carbon composite fibre.

2. insulated aerial cable according to claim 1, it is characterised in that described no core insulated aerial cable, is 10kV insulated aerial cable.

3. no core insulated aerial cable according to claim 1 and 2 is it is characterised in that graphene fiber and carbon fiber Compositely proportional, by volume, graphene fiber:Carbon fiber is 2:1～1:3, preferably 1:2.

4. the no core insulated aerial cable according to one of claim 1-3 is it is characterised in that outer layer is doped with 7-12% Graphene/carbon composite fibre, preferably 8-10%.