CN209674973U - A kind of insulated aerial cable - Google Patents

Abstract

The utility model discloses a kind of insulated aerial cables, and including carrying core, conductor wire core, heat dissipating layer, protective layer, lightning protection layer and the insulating layer set gradually from the inside to the outside, the carrying core is the surface layer that carbon fiber rod is coated on using glass fibre.Carrying core is made using the higher material of tensile strength than steel core, makes insulated aerial cable that there is biggish tensile resistance, the applicable high-voltage transmission in the relatively rugged environments such as biggish icing, wind pressure.In addition, being equipped with anti-lightning strike protective layer in the cable, the anti-lightning strike defencive function to aerial cable is realized.

Description

A kind of insulated aerial cable

Technical field

The utility model relates to aerial cable technical fields, and in particular to a kind of insulated aerial cable.

Background technique

Aerial cable is mostly used in the old electric network reconstruction in city at present, there are following excellent using aerial cable Gesture: substantially reducing all kinds of short troubles, and compared with overhead bare conductor, failure rate wants low 4-6 times；Supply Security is good, can reduce Person electric shock casualty accident；It can set up, can also be set along wall stand on any kind of shaft tower, it in special circumstances can also be in a clump of trees It walks, is directly fixed in tree trunk with fitting；Aerial cable need not also carry out special walkaround inspection, nor can be because of branch Network and resident throw out sundries or suspension arm of crane false hit etc. without care and form short-circuit trip accident, to significantly reduce route Maintenance and repair work.

General aerial cable is all single, can be divided into duralumin cable architecture, hard-drawn copper wire structure, aluminium by its structure difference Alloy cable architecture, steel core or aluminium alloy core support construction and three core lay configuration of self-bearing type (core can be duralumin or hard copper wire) Deng in the overhead transmission line of requirement of mechanical strength higher occasion and 35KV or more, mostly using steel-cored aluminium strand cable, but at present Steel-cored aluminium strand cable have the shortcomings that than great, tensile strength is poor, it is difficult to bear the outer lotus such as biggish icing, wind pressure It carries.In addition, the lightning protection mode of aerial cable is that lightning conducter is equipped with above cable at present, it is difficult to install, and be mounted to This is larger, it is difficult to protect to full aerial cable, therefore aerial cable has the risk split by thunder.

Utility model content

In order to overcome the tensile strength of above-mentioned current aerial cable poor and there is the technological deficiency split by thunder, this is practical Novel to provide a kind of insulated aerial cable, carrying core is made of the high material of tensile strength, applicable to cover biggish The high-voltage transmission of the relatively rugged environments such as ice, wind pressure, and lightning protection layer is equipped in cable, it realizes to the anti-lightning strike of aerial cable Defencive function.

To solve the above-mentioned problems, the utility model is achieved by following technical scheme:

A kind of insulated aerial cable described in the utility model, including carrying core, the conductor wire set gradually from the inside to the outside Core, heat dissipating layer, protective layer, lightning protection layer and insulating layer, the carrying core are to be coated on carbon fiber rod using glass fibre Surface layer.

Further, the conductor wire core is aluminium conductor or aluminium alloy conductor, and several conductor wire cores are stranded in lifting-line The surface layer of core.

Further, the cross section of the conductor wire core is trapezoidal.

Further, the heat dissipating layer is formed using highly-conductive hot carbon fiber cloth is wrapped.

Further, the protective layer is silastic-layer.

Further, the lightning protection layer is internal wrapped, external using tinned copper wire braiding using aluminium-plastic tape It forms, the lightning protection layer ground connection.

Further, the insulating layer is TPEE layers.

Compared with prior art, the utility model has the beneficial effects that using the higher material of tensile strength than steel core Carrying core is made, makes insulated aerial cable that there is biggish tensile resistance, it is applicable relatively to be disliked in biggish icing, wind pressure etc. High-voltage transmission in bad environment.In addition, being equipped with anti-lightning strike protective layer in the cable, the anti-lightning strike guarantor to aerial cable is realized Protective function.

Detailed description of the invention

Specific embodiment of the present utility model is described in further detail with reference to the accompanying drawing, in which:

Fig. 1 is a kind of structural schematic diagram of insulated aerial cable described in the utility model；

In figure: 1- carries core；2- conductor wire core；3- heat dissipating layer；4- protective layer；5 lightning protection layers；6- insulating layer.

Specific embodiment

It is illustrated below in conjunction with preferred embodiment of the attached drawing to the utility model, it should be understood that described herein excellent It selects embodiment to be only used for describing and explaining the present invention, is not used to limit the utility model.

As shown in Figure 1, a kind of insulated aerial cable described in the utility model, including the carrying set gradually from the inside to the outside Core 1, conductor wire core 2, heat dissipating layer 3, protective layer 4, lightning protection layer 5 and insulating layer 6.

Specifically, glass fibre is coated on to the surface layer of carbon fiber rod using omnipotent coating machine, a carrying is collectively formed Core 1.Carbon fiber is high strength and modulus fiber, tensile strength 2399MPa, and high-tensile steel wires tensile strength is The tensile strength of 1410MPa, carbon fiber are much higher than steel wire, are the preferred materials of the carrying core 1 as aerial cable, make to make somebody a mere figurehead Cable has higher tensile strength.Glass fibre has that good insulating, heat resistance be strong, high mechanical strength, makes to carry cable tool There are heat-resisting quantity and insulating properties, avoids destruction of the high temperature to carrying core 1.In addition, using made of glass fibre and carbon fiber Carry core 1, specific gravity is about a quarter of steel wire, can reduce the load-carrying of aerial cable, improve increase between bar, tower across Away from reduction engineering cost；Magnetic loss and fuel factor caused by avoiding simultaneously because of steel wire have lower running temperature, to subtract The loss of electric current is conveyed less.

The conductor wire core 2 is aluminium conductor or aluminium alloy conductor, is used as the conveying of high-tension current, by several conductor wires Core 2 is stranded in the surface layer of carrying core 1, and the cable core of aerial cable is collectively formed.Using aluminum or aluminum alloy as conductor wire core 2, Security performance with higher and conducting wire performance, there is good creep resistance and corrosion resistance, furthermore the weight of aluminium and aluminium alloy Amount is about the one third of copper, can reduce cable weight, reduces installation cost, reduces the abrasion of equipment and cable, makes erector Make lighter.Preferably, the conductor wire core 2 uses cross section for trapezoidal trapezoidal single line structure, is collectively formed seamless, horizontal The small cable core in section, keeps the cross section of aerial cable smaller, saves occupied space.

The heat dissipating layer 3 is formed using highly-conductive hot carbon fiber cloth is wrapped, has high thermal conductivity coefficient, high tensile, can be incited somebody to action The heat that conductor wire core 2 generates radiates after being quickly transferred to the inner liner layer of cable core, avoids the temperature mistake of conductor wire core 2 It is high and increases the resistance of conductor wire core 2, reduce the power consumption of conductor wire core 2, the current-carrying capacity of raising conductor wire core 2, simultaneously It is also prevented from the risk of localized hyperthermia's shot-firing cable.

The lightning protection layer 5 is that inside is wrapped, external using aluminium-plastic tape to be woven using tinned copper wire, and is plated The count of tin copper wire reaches 85% or more, makes lightning protection layer 5 that can wrap up cable core comprehensively.The lightning protection layer 5 can be adopted With conducting wire or other conductors and ground, lightning stroke can be drained into ground in the electric current of aerial cable, lightning stroke is avoided to generate Instantaneous ultra-high pressure current is more than the bearing capacity of conductor wire core 2, to destroy the structure of conductor wire core 2.In addition, copper wire have every The electromagnetic isolated of cable core and outside air can be generated shield effectiveness, prevent conductor wire core 2 by extraneous electricity by the effect that off screen is covered The interference of magnetic.

Further, protective layer 4 is provided between the lightning protection layer 5 and heat dissipating layer 3, the protective layer 4 uses silicon Rubber is made, and silicon rubber has heat resistance outstanding and insulating properties, can bear 180 DEG C of high temperature, be not easy to be melted by high temperature It destroys, while conductor wire core 2 and lightning protection layer 5 being completely cut off, avoid conveying the electric current on conductor wire core 2 with lightning protection layer 5 are connected to ground, and the electric current that lightning stroke generates simultaneously effective is transferred to ground with lightning protection layer 5 rather than flows to conductor wire Core 2.

The insulating layer 6 is made of TPEE, and TPEE has high tensile strength, applicable in biggish icing, wind The relatively rugged environments such as pressure cause biggish pulling force to aerial cable；In addition, TPEE have excellent heat resistance, creep resistant and Fatigue performance, it is substantially not weightless in 110~140 DEG C of laser heating 10h；In conditions such as water mist, ozone, outside atmosphere agings Under, chemical stability is excellent, can avoid internal lightning protection layer 5 and conductor wire ideally as the insulating layer of aerial cable 6 Core 2 is destroyed by the corrosive gas in atmosphere.

A kind of other structures of insulated aerial cable described in the present embodiment are referring to the prior art.

The above descriptions are merely preferred embodiments of the present invention, not makees in any form to the utility model Limitation, therefore it is all without departing from the content of the technical scheme of the utility model, implement according to the technical essence of the utility model to above Any modification, equivalent variations and modification, are still within the scope of the technical solutions of the present invention made by example.

Claims (7)

1. a kind of insulated aerial cable, which is characterized in that including carrying core (1), the conductor wire core set gradually from the inside to the outside (2), heat dissipating layer (3), protective layer (4), lightning protection layer (5) and insulating layer (6), the carrying core (1) are using glass fibers Dimension is coated on the surface layer of carbon fiber rod.

2. insulated aerial cable according to claim 1, it is characterised in that: the conductor wire core (2) is aluminium conductor or aluminium Alloy conductor, several conductor wire cores (2) are stranded in the surface layer of carrying core (1).

3. insulated aerial cable according to claim 2, it is characterised in that: the cross section of the conductor wire core (2) is ladder Shape.

4. insulated aerial cable according to claim 1, it is characterised in that: the heat dissipating layer (3) uses high thermal conductivity carbon fiber Cloth is wrapped forms for dimension.

5. insulated aerial cable according to claim 1, it is characterised in that: the protective layer (4) is silastic-layer.

6. insulated aerial cable according to claim 1, it is characterised in that: the lightning protection layer (5) is internal uses Aluminium-plastic tape is wrapped, it is external woven using tinned copper wire, lightning protection layer (5) ground connection.

7. insulated aerial cable according to claim 1, it is characterised in that: the insulating layer (6) is TPEE layers.