JPH0314914Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Related Technical Field) The present invention relates to a damper for suppressing vibration of a multi-conductor power transmission line, for example, a power transmission line having three or more conductors.

(Prior art) Conventional dampers for multi-conductor transmission lines have included dampers for single conductors attached to each line, or dampers for two conductors in combination, but there is no effective damper for three or more conductors. Nakatsuta.

(Problems to be solved by the invention) To provide an effective damper that can be applied to multiple conductors of three or more conductors from the beginning without combining conventional single/multi-conductor or two-conductor dampers.

(Means for solving the problem) Both ends of the stranded metal wire are installed eccentrically with respect to each elemental conductor through the wire grip part, which is attached at an angle θ with respect to the vertical direction to each elemental conductor of a multi-conductor power transmission line. These stranded metal wires are interconnected at their central portions with a connecting fitting, so as to impart a mutually related torsional moment to each elementary conductor. If the multi-conductor power transmission line is made up of three bare conductors, each of the two bare conductors is attached to the wire grip part via a stranded metal wire, and the central part of these two stranded metal wires is connected to the other conductor. They were connected to each other using a connecting metal fitting attached to one elemental conductor, and were also attached eccentrically to another elemental conductor.

(First Example) This will be explained with reference to FIGS. 1 to 3. In the case of the figure, the electric wire consists of three conductors 1. 2 is, for example, a steel-core aluminum stranded wire, which is eccentric to the conductor 1 by wire gripping portions 3 at both ends;
are connected at an angle θ with respect to the vertical direction (in the example shown, θ=90°, that is, they are installed horizontally). Twisted wires 2 are attached to the upper and lower two conductors 1 in the same way, and these upper stranded wires 2, 2 are eccentric to the lower conductor 1 remaining by the connecting fitting 4, and are also connected in the vertical direction. They are connected at an angle θ. The connecting fitting 4 is made symmetrically, and is connected to the stranded wire 2 at the upper part, and grips the conductor 1 at the lower center. The wire grips are interconnected with each strand,
The wires are configured to interfere with each other and generate a torsional moment in the wire and the stranded wire.

(Second embodiment) This will be explained with reference to FIGS. 4 to 6. In this case, the electric wire is composed of four conductors 1. In this embodiment, as shown in FIG.
eccentric to the vertical direction, and at an angle to the vertical direction (θ=
90°) and fixed. Next, the upper two strands 2 and the lower two strands 2 attached in this manner are connected at the center by a connecting fitting 5. The connecting fitting 5 is configured symmetrically, and has fixing portions for the stranded wire 2 at four locations, two at the top and two at the bottom. Thus, the wire grips are interconnected at each strand and are configured to interfere with each other to create a torsional moment in the wire and strands.

(Function) When vibration occurs in a multi-conductor wire, elemental conductors 1 connected via strands 2... mutual interference and vertical vibration of the wires cause torsion moment to act on the wires and strands, causing torsion. Vibration is suppressed by the resistance.

(Effects) The parts constituting the multi-conductor power transmission line damper have a simple shape and are easy to manufacture, which is advantageous in terms of cost. Furthermore, since the stranded wires and their connecting fittings are present inside the three or four multi-conductors, and no parts protrude outside the multi-conductors, it has excellent corona characteristics.

[Brief explanation of the drawing]

FIG. 1 is a front view of the first embodiment of the present invention. Figure 2 is also a side view. FIG. 3 is also a perspective view. FIG. 4 is a front view of the second embodiment of the present invention. Figure 5 is also a side view. FIG. 6 is also a perspective view. In the figure: 1... conductor, 2... stranded wire, 3...
...Wire grip part, 4, 5...Connection fittings.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) Both ends of the stranded metal wire 2 are connected to each element conductor 1 of the multi-conductor transmission line through the wire grip part 3 attached at an angle θ with respect to the vertical direction. These stranded metal wires 2 are connected to each other at their central portions using connecting fittings, so that mutually related torsional moments are imparted to each elementary conductor 1. Damper for multi-conductor power transmission lines. (2) When a multi-conductor power transmission line is composed of three elementary conductors 1, each of the two elementary conductors 1 is attached via a wire grip part 3 and a metal strand 2, and these two metal strands 2 Scope of Utility Model Registration Claim 1, in which the center portions of the conductors are connected to each other by a connecting fitting 4 attached to another elementary conductor 1, and are also attached eccentrically to the other elementary conductor 1. Damper for multi-conductor power transmission lines as described.