JPH1153950A - Low wind pressure electric wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low wind pressure electric wire, capable of reducing strain (fatigue strength) at a thick element wire part by composing a structure in which a thick element wire and a thin element wire coexist in an outermost layer of a stranded wire. SOLUTION: In a low wind pressure electric wire comprising a thin element wire 2' and a thin element wire 1 coexisting in the outermost layer of a stranded wire, the thick element wire 2' provides a multiple structure divided in diametrical direction of an electric wire, thereby a strain on the side of the thick element wire 2' is equal to or close to that of the thin wire. Specifically, in a multiple structure with the thick element wire 2', a structure in which the wire is divided smaller than an adjacent non-divided element wire (or which has a step difference at the divided part) is provided as being useful for displacement prevention of the divided element wires 3 and 4 with each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the technical field of overhead power transmission lines, and more particularly, to a wire in which the outermost layer of a stranded wire has a low wind pressure characteristic by smoothing the outermost layer. The present invention relates to a low wind piezoelectric wire having a structure in which strands having a small diameter are mixed.

[0002]

2. Description of the Related Art FIG. 3 shows a cross-sectional structure of a low wind piezoelectric wire as a conventional example, based on a steel core aluminum stranded wire in which an aluminum stranded wire is provided on a steel stranded wire. The cross-sectional shape is made elliptical by mixing small wires 1 and thick wires 2 and the outer peripheral surface is formed as a whole smoothly.

[0003]

[Problems to be solved by the invention]

According to the prior art described above; according to the low wind piezoelectric wire of FIG. 3, although the thin wire and the thick wire are mixed in the outermost layer of the stranded wire, the strain to the wire due to the bending of the wire is large. The strands having different thicknesses have different degrees of distortion.

[0004] In other words, as described above, the strain due to the bending of the thick wire is relatively larger than that of the thin wire, and the fatigue strength is weakened.

Therefore, the problems to be solved by the present invention (objects)
Is a structure in which a thick wire and a thin wire are mixed in the outermost layer of the stranded wire, and low wind pressure that can reduce distortion (fatigue strength) in the thick wire portion It is to provide an electric wire.

[0006]

SUMMARY OF THE INVENTION A low wind piezoelectric wire provided by the present invention is a low wind piezoelectric wire in which a thick wire and a thin wire are mixed in the outermost layer of a stranded wire. A large strand is formed into a multiplex structure in which the large strand is divided in the radial direction of the electric wire, so that the strain on the side of the thick strand becomes equal to or close to that of the thin strand.

As a first specific mode, in the multiplex structure of the thick wires, it is possible to provide a structure in which the divided wires are divided smaller than adjacent non-divided wires. Between the divided wires can be prevented.

As a second specific mode, in the structure for dividing the thick wires, it is possible to provide a structure having a step at the divided portion, whereby the displacement between the divided wires can be prevented in the same manner as described above. .

[0009] When the first and second embodiments are combined, it is possible to more surely prevent the divided strands from shifting.

[0010]

FIG. 1 shows a first embodiment of the present invention in the form of a cross section of a low wind piezoelectric wire, in which a steel core aluminum stranded wire having a structure in which an aluminum stranded wire is provided on a steel stranded wire is used. As the base, the outermost layer of the aluminum stranded wire is made by mixing the thin wire 1 and the thick wire 2 'so that the cross section is elliptical and the outer peripheral surface is smooth. It is formed as a variant element wire having a non-circular cross section.

Thus, the thick wire 2 'has a multiplex structure of the divided wires 3 and 4 divided in the radial direction.
In the divided strands 3 and 4, the strain due to bending was equal to or close to that of the strand 1 having a small thickness.

Each of the divided wires 3 and 4 is made smaller than the adjacent wires, and each of the divided wires 3 and 4 is sandwiched between the adjacent wires to prevent deviation between the divided wires. ing.

FIG. 2 shows a second embodiment of the present invention in the form of a cross section of a low wind piezoelectric wire, which is based on a steel core aluminum stranded wire having a structure in which an aluminum stranded wire is provided on a steel stranded wire. The outermost layer of the stranded wire is a mixture of a thin wire 1 and a thick wire 2 ″, so that the cross section has an elliptical shape, and the cross section is non-circular so that the outer peripheral surface is smooth. Is formed as a variant element wire.

Thus, the thick wire 2 ″ has a multiplex structure of the split wires 5 and 6 divided in the radial direction.
In the divided strands 5 and 6, the strain due to bending was equal to or close to that of the strand 1 having a small thickness.

The divided wires 5 and 6 are made smaller than the adjacent wires, so that each of the divided wires 5 and 6 is sandwiched between the adjacent wires. Divided surface: a structure having a step 7 on the united surface, thereby more reliably preventing deviation between the divided strands.

In the above embodiment, a low wind piezoelectric wire having an elliptical cross section and a smooth outer peripheral surface has been described. It should be noted that the present invention can be applied to a portion where the size of the image becomes larger.

[0017]

According to the present invention as described above, the outermost layer of the stranded wire has a structure in which a thick wire and a thin wire are mixed, and the strain in the thick wire portion is reduced. It is possible to achieve an intended task (object) of providing a low wind piezoelectric wire capable of reducing (fatigue strength).

[Brief description of the drawings]

FIG. 1 is a cross-sectional structural explanatory view of a low wind piezoelectric wire according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional structural view of a low wind piezoelectric wire according to a second embodiment of the present invention.

FIG. 3 is an explanatory view of a cross-sectional structure of a low wind piezoelectric wire in a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Thin wire 2 'Thick wire 3, 4 Split wire 2 "Thick wire 5, 6 Split wire

Claims (3)

[Claims] 1. A low wind piezoelectric wire in which a thick wire and a thin wire are mixed in the outermost layer of a stranded wire, wherein the thick wire is divided in a radial direction of the wire. A low wind piezoelectric wire. 2. The multi-layered structure of the thick wires is divided smaller than adjacent non-divided wires.
Low wind piezoelectric wire as described. 3. The low wind piezoelectric wire according to claim 1, wherein the splitting structure of the wire having a large thickness has a step in a split portion.