A spring shock-absorbing type phase-to-phase anti-galling spacer

Abstract

The invention belongs to the field of design, operation and maintenance of overhead transmission lines in power systems, and in particular relates to a spring shock-absorbing interphase anti-galling spacer, which is mainly used for transmission lines with voltage levels of 66kV and above. In the present invention, the anti-galling shock absorber is connected to the middle part of the two interphase spacer insulators through connecting fittings; the outer two ends of the two interphase spacer insulators are respectively connected to the clamp cover through connecting fittings. The invention can withstand pressure or tension, the guide rod can guide the interphase spacers to move along the axial direction of the spring, and the convex buckle baffle can organize the damping spring to bear excessive tension. It can effectively improve the force distribution of the wire clip joint after the torque is increased after the wire is covered with ice, can effectively suppress the line breeze vibration and sub-gap vibration, and provide a quick release of galloping self-excited oscillation energy when galloping is caused by very bad weather conditions. significantly. The utility model has the characteristics of simple and practical structure, convenient installation, low cost and maintenance-free, and has wide application prospects.

Description

technical field [0001] The invention belongs to the field of design, operation and maintenance of overhead power transmission lines in power systems, and in particular relates to a spring shock-absorbing interphase anti-galling spacer, which is mainly used for power transmission lines with a voltage level of 66kV and above. Background technique [0002] When the wind blows on the overhead transmission line with a non-circular cross-section due to ice coating, it will generate a certain amount of aerodynamic force, which will easily induce a low-frequency, large-amplitude self-excited oscillation of about 0.1-3 Hz in the line. The upper performance is that there is only one or a few half-waves in a span, which is called galloping. Galloping is extremely harmful to overhead transmission lines. It will cause line flashover, tripping, loosening and falling off of tower bolts, and in severe cases, damage to hardware and insulators, broken strands, broken wires, and even tower col...

AI Technical Summary

Problems solved by technology

At present, these composite interphase spacers are generally connected by ordinary rod insulators and ordinary clamp fittings, which can only limit galloping to a certain extent, and are not effective in suppressing breeze vibration and sub-gap vibration.

When the weather conditions are very bad, once the line gallop occurs, the ordinary composite interphase spacer lacks a way to release the line gallop energy, and cannot quickly eliminate the line gallop

At the same time, dancing for a long time may also easily cause defects such as loose clamp bolts and crushed lines, which require regular maintenance

Such equipment has potential safety hazards, which will directly affect the safe and stable operation of transmission lines and increase maintenance costs

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