CN2235150Y

CN2235150Y - Overhead cable

Info

Publication number: CN2235150Y
Application number: CN 95250017
Authority: CN
Inventors: 张选南; 徐业源
Original assignee: HUBEI CHEMICAL CABLE WORKS
Current assignee: HUBEI CHEMICAL CABLE WORKS
Priority date: 1995-12-28
Filing date: 1995-12-28
Publication date: 1996-09-11
Anticipated expiration: 2005-12-28

Abstract

The utility model relates to a novel insulating overhead cable with a steel core and an aluminum strand. The overhead cable is composed of a conductor, a shielding layer and an insulating layer. A steel core is positioned at the center of the conductor, the outer part of the steel core is uniformly provided with a plurality of aluminum wires, and the diameter of the aluminum wire is equal. The aluminum wires are twisted into integration. The outer part of the conductor is coated with the shielding layer, and the outer part of the shielding layer is coated with the insulating layer. Because the center of the aluminum core insulating wire of the utility model is provided with the steel core, the insulating requirement can be satisfied, the tensile strength and the anti-vibration performance are enhanced, and the application safety factor is greatly improved. Because steel products are used for replacing aluminum products at the center of the utility model, the cost is reduced, and the utility model is an overhead cable which is worthy to be generalized.

Description

A kind of novel aerial cable

The utility model relates to a kind of aerial cable.

Existing city aerial cable mostly is bare conductor type and aluminium core insulation type.Bare conductor type aerial cable is at the center of aluminium stranded conductor steel core wire to be set, though tensile strength is big, but often because of strong wind and heavy rain, make electric wire collision causing short circuit, waving of trees branches and leaves also is the regular reason that causes wire short-circuiting in the rain, lighting thunderbolt and other unpredictable factor etc. all make the bare conductor line big in the density of population, and use in the city that building is more and more higher has very big danger.Aluminium core insulation type aerial cable is at the appearance of aluminium stranded conductor cladding insulating barrier, though the exposed security incident that causes of unlikely conductor, tensile strength is low, to the object of unexpected generation fall, the strong wind vibration, be difficult to avoid the consequence that breaks, also cause security incident; Can not be by par under the large span situation of setting up because of the geographical position, the intensity of aluminium core insulation cable can not satisfy the requirement of safe handling.

The purpose of the utility model is that a kind of high tensile strength that both had will be provided, and the steel core aluminium that can insulate again strand insulated cable is to improve the coefficient safe in utilization of overhead wire.

Technical solution of the present utility model is at the center of aluminium core insulation line steel core to be set, steel core can be a sub-thread, also multiply, concrete structure is made up of conductor, conductor shielding layer, insulating barrier, and it is round that cross-sectional area of conductor is, and steel core is positioned at its center, steel core is outward the evenly distributed multiply aluminum steel of equal diameter, stranded back becomes as a whole, and shielding layer is coated on the conductor appearance equably, conductor shielding layer outsourcing insulating layer coating.

The utility model makes cable increase tensile strength and anti-vibration performance again when satisfying insulation property owing at aluminium core insulation line center steel core is set, and has improved the coefficient safe in utilization of aerial cable greatly; The insulated wire center of aluminium core becomes steel product cost by aluminium and also greatly reduces, so be a kind of inexpensive novel aerial cable that is worthy to be popularized.

Talk two embodiment below in conjunction with accompanying drawing.

Fig. 1 is the steel core aluminium strand insulated cable of sub-thread for steel core.

Fig. 2 is 7 strands steel core aluminium strand insulated cable for steel core.

Referring to Fig. 1, Fig. 2, steel core 1 is positioned at the conductor center, and the cross section is circular, when the copper core is sub-thread, adopts single zinc-coated wire and aluminum steel to press and is twisted into thigh; When steel core is 7 bursts, 7 zinc-coated wire circles are twisted into thigh, press circle with aluminum steel again and be twisted into thigh, make conductor become as a whole, evenly coat shielding layer 3 then outside conductor, conductor shielding layer 3 outer even again coated insulation layers 4 promptly become steel core aluminium strand insulated cable.

Claims

1, a kind of novel aerial cable is made up of conductor, conductor shielding layer, insulating barrier, it is characterized in that, steel core is positioned at the conductor center, the outer evenly distributed equal diameter multiply aluminum steel of steel core, and stranded back becomes as a whole, outside the conductor, be coated with shielding layer, shielding layer is coated with insulating barrier.

2, a kind of novel aerial cable according to claim 1 is characterized in that, described steel core is a sub-thread.

3, a kind of novel aerial cable according to claim 1 is characterized in that, described steel core is that multiply combines.