Pre-twisted spacer

Abstract

A pre-twisted spacer bar belongs to the technical field of spacer devices for overhead wires of power transmission lines, and in particular relates to a pre-twisted spacer bar. The invention provides a pre-twisted spacer bar which can improve the stress performance between the spacer bar and the conductor and is easy to install. The present invention includes a support rod, and its structural points are wire clips arranged at both ends of the support rod. There are pre-twisted wires in the inner thread; the inner end of the clamp is a connecting splint, and the connecting splint and the end of the support rod are provided with a connecting hole correspondingly. There is a horizontal positioning hole on the top, and a positioning pin is inserted in the positioning hole; the middle part of the support rod is connected with one end of the arc-shaped rotary arm through a pin shaft, and the other end of the arc-shaped rotary arm is fixed with the connecting plate at the end of the mandrel, and the mandrel There are umbrella skirt groups on both sides, and a pressure equalizing ring is arranged on the mandrel near the end of the mandrel.

Description

technical field [0001] The invention belongs to the technical field of spacing devices for overhead conductors of power transmission lines, and in particular relates to a pre-twisted spacer bar. Background technique [0002] When using overhead wires, spacers need to be used. The installation of existing spacers is complicated, and there will be stress concentration at the contact points. When subjected to wind loads, suppressing the galloping of the wires will damage the wires, and in severe cases, it will cause disconnection accidents, which will cause safety hazards to the power grid. Hidden danger. In addition, bolts or other fastening methods are generally used for the clamps of the existing spacers, so that the fastening operation between the clamps and the wires needs to be realized by using a special spacer wrench, but excessive torque will cause damage to the wires or bolts , and if the torque is too small, the grip force between the wire and the anti-vibration ham...

AI Technical Summary

Problems solved by technology

[0002] Spacer rods are required when using overhead conductors. The installation of existing spacer rods is complicated, and stress concentration occurs at the contact points. When subjected to wind loads, suppressing the galloping of the conductors will damage the conductors, and in severe cases, it will cause disconnection accidents, which will cause safety hazards to the power grid. Hidden danger

In addition, bolts or other fastening methods are generally used for the clamps of the existing spacers, so that the fastening operation between the clamps and the wires needs to be realized by using a special spacer wrench, but excessive torque will cause damage to the wires or bolts , while the torque is too small, the grip force between the wire and the anti-vibration hammer will not meet the standard; at the same time, the wire clip will cause local concentrated force on the wire, which will affect the performance of the wire

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