JPS5951206B2 - Interphase spacer for overhead power transmission lines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mutual spacer for overhead power transmission lines.

Conventionally, in overhead power transmission lines, in order to prevent short-circuit accidents due to tangents between phases or lines due to various dynamic movements of conductors, various vibration prevention dampers have been used to suppress the movement itself, or to prevent the movement itself from occurring. Measures have been taken to secure the separation distance by directly connecting them with an insulating material such as an interphase spacer.

However, although it has been confirmed that the former type of vibration prevention damper has a considerable suppressing effect on slight wind vibrations on power transmission lines, the aerodynamics of the conductor when ice and snow accumulate on power transmission lines This method has the disadvantage of not being effective in suppressing low-frequency, large-amplitude gearropping that occurs due to physical instability.

In addition, in the case of the latter type that uses an interphase spacer, by installing the interphase spacer at any location between the transmission line spans, vibrations between the phase conductors can be interfered with each other, resulting in gear-ropping of transmission lines of different phases. This has the effect of suppressing the distance between the transmission line tower support point and the interphase spacer attachment point, and ensuring the necessary separation distance at the interphase spacer attachment point no matter how the transmission line moves. The drawback is that it is not possible to completely suppress vibration within the subspan.

The phase spacer for overhead power transmission lines of the present invention is a new one that eliminates all the drawbacks of the above-mentioned anti-vibration damper and phase spacer. A pair of connecting bodies of approximately equal length that connects a plurality of power transmission lines in parallel at a predetermined interval perpendicular to the longitudinal direction thereof, and a damper member in the same phase between the center or both ends of the pair of connecting bodies. and an insulating spacer rod that connects the upper and lower phase damper members at their central portions, and the upper and lower phase damper members connected to the ends of the spacer rods have different elastic modulus. This relates to a phase spacer for overhead power transmission lines.

The present invention will be explained in more detail below with reference to the illustrated embodiments.

In the practical example shown in FIG. 1, the phase spacer for overhead power transmission lines of the present invention is applied to double conductors, and spacer rods 10 made of insulating material such as synthetic resin or porcelain are attached at both ends.
A damper member 2 of a predetermined length in the form of a cable or rod made of stranded wires is fixed in a T-shape, and two conductors 3 are connected at both ends of the damper member 2 at a predetermined interval in the longitudinal direction of the power transmission line. The ends of the connecting body 4, which supports and is connected at right angles to this, are connected to the central part of the coast.

Next, the embodiment shown in FIG. 2 is an application of the phase spacer for overhead power transmission lines of the present invention to four conductors, in which four conductors 3 are placed at predetermined intervals in the longitudinal direction of the power transmission line in the upper, lower, left and right directions. A pair of connecting bodies 4 supported parallel to the direction and perpendicular to the conductor 3
The left and right ends of the are connected to each other by two damper members 2 at a predetermined interval, and the midpoints of the damper members 2 and 2 are connected to each other by a spacer so as to form a T-shape when viewed from one direction using a connecting fitting 5. It is connected to the end of the rod 1.

In the above embodiments, the power transmission line is applied to two conductors and four conductors, but in the present invention, there is no limit to the number of conductors in the power transmission line, and there is no limit to the number of damper members. .

In the embodiment shown in FIG. 3, the damper member 2 and the spacer rod 1 are connected by inserting the damper member 2 into the cylindrical body 6 provided at the end of the spacer rod 1. 1 is connected movably in the longitudinal direction (in the direction of the arrow) to a damper member 2, and the energy generated when the conductor vibrates is absorbed by the damper member 2, and the spacer rod 1 is movable in the longitudinal direction of the damper member 2. The energy generated when the conductor moves is absorbed by collision with stoppers 7 attached at predetermined intervals in the longitudinal direction of the damper member for adjusting the movable distance.

Furthermore, in the embodiment shown in FIG. 4, the length of the damper members 2 attached to the upper and lower phases is such that the damper members attached to both ends of the spacer rod 1 also interfere with each other to suppress vibration between the phase conductors. 1□ and 12 are changed to have different elastic coefficients.

In addition, as a measure to vary the elastic modulus of the damper member, it is possible to change the length 11.1° of the damper member, as well as by changing the number of twisted wires, the diameter, and the number of the damper member. There are no limits to the measures.

In addition, in the embodiment, a damper cable made of stranded wires was used as a damper member, but a damper rod made of a metal rod or an FRP rod may be used instead of the cable, and there are no restrictions on the material and structure. do not have.

As is clear from the above description of the embodiments, the interphase spacer for overhead power transmission lines of the present invention has an extremely simple structure, which reduces the amount of energy that occurs due to aerodynamic instability of conductors when snow and ice accumulate on power transmission lines. It also effectively suppresses gearropping with large frequency amplitudes, and has an extremely significant contribution to the industry.

[Brief explanation of drawings]

1 to 4 are perspective views of embodiments in which the phase spacer for overhead power transmission lines of the present invention is attached to power transmission lines, respectively. 1... Spacer rod, 2... Damper member, 3...
...Conductor, 4...Connection body, 5...Connection fitting, 6...
- Cylindrical body, 7... stopper.

Claims (1)

[Scope of Claims] 1. A phase spacer for overhead power transmission lines, which is a spacer having a length of about 100 cm, which connects a plurality of power transmission lines in each of the upper phase and the lower phase in parallel at a predetermined interval at right angles to their long signal directions. A pair of equal connecting bodies, a damper member that connects in the same phase between the center or both ends of the pair of connecting bodies, and an insulating spacer rod that connects the damper members of the upper and lower phases at the center thereof. A phase spacer for an overhead power transmission line, characterized in that the damper members of the upper and lower phases connected to the ends of the spacer rod have different elastic modulus. 2. A mutual spacer for an overhead power transmission line according to claim 1, wherein the damper member is connected to the spacer rod in a substantially T-shape. 3. Claim 1 or 2 in which the spacer rod and the intermediate position of the damper member are connected via a connecting fitting.
Mutual spacer for overhead power transmission lines as described in section. 4 A cylindrical body for inserting and supporting a damper member of a predetermined length is attached to the end of a spacer rod made of an insulating material, and the damper member is provided with a stopper for movable interval adjustment to limit movement of the cylindrical body. A spacer for an overhead power transmission line according to claim 1, wherein the spacer is provided with: