Combined pre-twisted tension-resistant wire clamp

Abstract

The invention relates to a combined pre-twisted tension-resistant wire clamp, and relates to components of overhead line equipment. The combined pre-twisted tension-resistant wire clamp comprises a connecting device and two pre-twisted wires. The connecting device comprises a triangular connecting board which is in the shape of an isosceles triangle. The top corner end of the triangular connecting board is provided with a hanging hole, and two bottom corner ends are respectively hinged with a hanging board. The other ends of the hanging boards are connected with two connecting boards which are symmetrically arranged in a non-contacting manner. A rotatably roller is connected with the other end of each of the two connecting boards. Each roller is connected with a pre-twisted wire. A holding force of the combined pre-twisted tension-resistant wire clamp can reach up to more than 100%of a puling breaking force of the twisted wire. The combined pre-twisted tension-resistant wire clamp is difficult to cause damages, great in holding force and light in weight, and can reduce dynamic stress. The stress which is born by the twisted wire is uniformly distributed on a larger combining surface, and a phenomenon of stress concentration does not exist, thereby ensuring the normal service life of a system.

Description

technical field [0001] The invention relates to components of overhead line equipment, in particular to a combined pre-twisted strain clamp. Background technique [0002] With the rapid increase of people's demand for power, however, the overhead insulated stranded wires need tension clamps to connect at the corners and ends, which requires a large number of tension clamps. Traditional strain clamps all adopt wedge structure, bolt structure or compression structure. The wedge-shaped strain clamp uses the splitting force of the wedge to lock the steel strands in the clamp. Since the locked steel strands are stressed unevenly, such wire clamps are easy to damage the steel strands, thereby reducing their service life. The bolt-type tension clamp uses the friction force generated by the vertical pressure of the U-shaped screw and the wavy wire groove of the clamp to fix the stranded wire, but the obtained friction force is small, and the local stress of the bolt locking part i...

AI Technical Summary

Problems solved by technology

Due to the uneven stress on the locked steel strand, this kind of clamp is easy to damage the steel strand and reduce its life.

The bolt-type tension clamp uses the friction force generated by the vertical pressure of the U-shaped screw and the wavy wire groove of the clamp to fix the stranded wire, but the obtained friction force is small, and the local stress of the bolt locking part is relatively high. Concentrated, the twisted wire is easy to loosen, and the safety is low

The compression-type strain clamp is connected and anchored by the steel anchor, and then the aluminum tube itself is plastically deformed by pressure, so that the clamp and the twisted wire are combined as a whole, but special equipment is required, the operation is complicated, and the installation quality is not easy control

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