Air-based fast damping bleeder

Abstract

The invention provides an air-based fast damping bleeder. The bleeder comprises an air cylinder barrel, slide rods, bolts, sealing rings, supporting bearings, pistons and valves. The working principleis that the kinetic energy of leads is converted to increase the pressure intensity and the internal energy of the air and the high pressure air is released without oscillation. The damping bleeder is installed on two leads when the damping bleeder is installed, the leads move back and forth to drive the pistons to move back and forth, the kinetic energy of the leads continuously changes the pressure intensity of the air, different amplitudes of lead movement pushes the pistons of the valve air outlets to different positions, the holes are exposed in turn according to the increasing order ofsize and then the high pressure air is continuously released to the outside so that the energy of different amplitudes of lead movement can be fast released. The damping bleeder is simple in structureand convenient to replace and especially can fast release the energy of lead movement without generating oscillation so as to have long service life and high application value.

Description

technical field [0001] The invention belongs to the field of power grid line movement safety, and in particular relates to an air-based fast damping release device for transmission wires. Background technique [0002] Under the influence of different climatic conditions, transmission lines, especially UHV transmission lines, will have different movement amplitudes and frequencies. Generally speaking, the movement of transmission lines includes three degrees of freedom, such as horizontal, vertical and twisting movements. However, when the movement amplitude and frequency reach a certain level, the sag of the conductor increases, the axial stress increases, and the fatigue limit decreases, which can easily cause the strands of the conductor to break; at the same time, the load on the insulator string, the cross arm and the tower will increase, It causes serious disasters such as insulator swing, cross-arm deformation, and tower tilting, which poses a great threat to the safe ...

AI Technical Summary

Problems solved by technology

However, when the movement amplitude and frequency reach a certain level, the sag of the conductor increases, the axial stress increases, and the fatigue limit decreases, which can easily cause the strands of the conductor to break; at the same time, the load on the insulator string, the cross arm and the tower will increase, Cause serious disasters such as insulator swing, cross-arm deformation, and tower tilting, which pose a great threat to the safe and stable operation of the power grid and directly cause losses to the national economy

[0003] The existing conductor movement dampers have their own advantages and disadvantages: double pendulum dampers are suitable for split conductors, easy to install, and have a good anti-vibration effect; interphase spacers can be applied to transmission lines with voltage levels of 220kV and below, or higher voltage levels The compact line has problems such as aging, discharge, and bending, and the large-amplitude anti-vibration effect is better; the turbulence damper is mainly used in areas with thinner ice, and the application of single wires is more than that of split wires. This anti-vibration device Light weight, easy to install, and there are problems of aging and deterioration; the eccentric weight is suitable for split conductors, pay attention to the influence of breeze vibration, and the anti-vibration effect is better; the detuning pendulum is effective for single conductors, and it is effective for split conductors It needs to be studied; the pressure damper is easy to obtain materials, can suppress breeze vibration, has a large degree of freedom, and is prone to disturbance; the clamp rotary spacer has a good anti-vibration effect and will not have a negative impact on the line. High cost of spacers

Due to the complexity of the wire motion problem, the existing commonly used motion damping devices have their pertinence in design and limitations in use, but the existing dampers all have a common shortcoming, that is, the motion energy of the wire cannot If it is released completely and quickly, part of it will return to the conductor, causing mutual interference movement, and even accelerating the damage to the transmission line

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