JPS5840736Y2 - Vibration isolation device for overhead power transmission lines - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a vibration isolator for overhead power transmission lines.

Conventional vibration isolators for overhead power transmission lines include armor rods, single dampers, and wire dampers.

Armor rods strengthen the wires by wrapping metal of the same type as the wires around the supporting parts of the wires. Armor rod reinforcement increases the resistance to vibration by reinforcing the distortion of power transmission lines caused by vibrations, and it also changes the natural frequency of the wire itself. This is to suppress vibration.

In addition, a single damper is installed at about half the length of the loop from the wire support point, and a weight is attached to the tip of the stranded steel wire to absorb vibration energy.

Examples of this type of damper include the stock bridge damper and the tone-onal damper.

A cold wire damper has an appropriate length of extension wire attached near the wire support point, and uses this extension wire to absorb vibration energy.

Examples of this type of damper include a bait damper and a cross wire damper.

Since all of these dampers have resonance characteristics, they are effective near the resonance frequency, but become completely ineffective when the frequency deviates from that frequency.

If you change your head, there is a limit to the effective frequency range.

In order to solve the above-mentioned drawbacks, the present invention uses contact polymerization in a sliding manner between a plate fixed to a wire support point and a plate supported at the tip of a rod fixed to a wire at a point distant from the support point. This is an anti-vibration device for overhead power lines.

To explain this concretely with drawings, Fig. 1 is an IIE side view, and Fig. 2 is a perspective view, in which 1 is a power transmission line, 2 is a suspension support point, and 3 is a suspension support point fixed to the suspension support point. Plate such as metal such as iron, copper, aluminum or epoxy resin, acrylic resin,
The clamps 4 and 5 are made of a non-metal such as Bakelite, and are attached to the wire 1 at a point slightly away from the suspension support point 2, and the rods 6 and 7 are fixed to these clamps.

Reference numerals 8 and 9 denote plates fixedly supported at the tips of the rods 6 and 7, which are made of the metal material or J[metal material, each plate 3° 8
．． A hole is provided in the center of the plate 9, and a bolt nut NL12 is coaxially inserted through the hole via a spring 10 and tightened to bring the plates into light contact so that they slide against each other.

The above plates 3, 8, and 9 are connected to the rod 6 due to the vibration of the electric wire. The vibration energy is dissipated and damped as frictional heat by rotating and sliding through γ to generate friction.

Since the rotational friction described above does not have a resonant frequency, it also effectively acts and damps vibrations at the axial frequency.

[Brief explanation of the drawing]

The drawings show a vibration isolator for an overhead power transmission line according to the present invention, and FIG. 1 is a front view thereof, and FIG. 2 is an assembled perspective view thereof. 1 is an overhead power transmission line; 2 is a wire hanging support point; 3 is a plate to be fixed to the support point; 4 and 5 are clamps on the wires distant from the support point 2; 6 and 7 are rods to be fixed to the clamps; 8 , 9 is a rod,
A plate is supported at the tips of 6 and 1 and is brought into contact with the plate 3, 10 is a spring, and 11.12 is a bolt and nut for coaxially tightening the plates 3, 8, and 9.

Claims (1)

[Scope of utility model registration request] A vibration isolator for an overhead power transmission line, comprising a plate fixed to a wire support point and a plate supported at the tip of a rod fixed to a wire at a point distant from the support point, which are brought into sliding contact and superposed.