Strain insulator string for multi-division transmission line

Abstract

The invention provides a strain insulator string for a multi-division transmission line, belonging to the technical field of multi-division overhead transmission lines. The string comprises a first group of U-shaped hanging rings, a second group of U-shaped hanging rings of a towing plate, a first dual-yoke plate, a first right-angle hanging plate, a ball head hanging ring, an insulator, a bowl head hanging plate, a ladder-shaped four- hole yoke plate, an extended pull rod, a second right-angle hanging plate, a second dual-yoke plate, a third dual-yoke plate, six groups of hardware strings and six sub-wires, which are mutually connected in sequence. The strain insulator string is applied to the places at the altitude of 3000m and below. Compared with the prior art, the strain insulator string has high reliability and can reduce the working capacity of construction and maintenance; performances of the strain insulator string are good, the corona voltage of the strain insulator string goes beyond the requirement of the 3000m altitude, and the electrical loss of line operation is less; and the problem that a shading ring is touched by the wires does not exist, and the problem of wire abrasion can be solved completely.

Description

technical field [0001] The invention belongs to the technical field of multi-split overhead transmission lines. Background technique [0002] In traditional power transmission lines, the shielding ring of the tension string adopts a helix structure, and its installation position in the tension string is located on the left and right sides of the wire bundle. Because its structure determines that it is always in the state of center of gravity offset, it is easy to produce fatigue deformation for a long time, and it is difficult to avoid damage during installation. At the same time, due to its installation position, the jumper cannot be connected in any direction, and it may also increase the number of wires. The probability of vibration and wear with the shielding ring will affect the safe operation of the transmission line. In order to avoid the wear and tear of the wires, most of the temporary measures currently used are to add rubber protective sleeves, and there are cert...

AI Technical Summary

Problems solved by technology

Because its structure determines that it is always in the state of center of gravity offset, it is easy to produce fatigue deformation for a long time, and it is difficult to avoid damage during installation. At the same time, due to its installation position, the jumper cannot be connected in any direction, and it may also increase the number of wires. The probability of vibration and wear with the shielding ring will affect the safe operation of the transmission line

In order to avoid the wear of the wires, the temporary measures currently used are mostly rubber protective sleeves, and there are certain risks in long-term operation.

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