Air-based translation and rapid damping releaser

Abstract

The invention relates to an air-based translation and rapid damping releaser. The releaser comprises an air cylinder, a piston screw rod, a bolt, a sealing ring, a support bearing, a piston and a valve and is arranged on two wires or adjacent spacing rods. Due to moving of a wire in a reciprocating way, the piston is driven to move in a reciprocating way, air pressure can be constantly changed bykinetic energy of the wire, the piston at an air outlet of the valve can be pushed to different positions by wire motion in different amplitudes, holes are sequentially exposed from small to large, high-pressure air is further and constantly released, and thus, wire motion energy in different amplitudes can be rapidly released. The damping releaser is simple in structure and is convenient to replace, the wire motion energy can be particularly and rapidly released, no oscillation is generated, and the damping releaser has relatively long service lifetime and relatively high application value.

Description

technical field [0001] The invention belongs to the technical safety field of power grid line movement, and in particular relates to an air-based translational fast damping releaser for transmission wires. Background technique [0002] Under the influence of different climatic conditions, transmission lines, especially UHV transmission lines, will have different motion amplitudes and frequencies, mainly high-frequency slight-amplitude breeze vibration, medium-frequency and medium-amplitude sub-gap oscillation, and low-frequency large-amplitude galloping Generally speaking, the movement of transmission wires includes three-degree-of-freedom movements such as horizontal, vertical, and twisting. Horizontal and vertical motions can be collectively referred to as translational motions. The axial stress increases and the fatigue limit decreases, which can easily lead to wire breakage; at the same time, the load on the insulator string, cross arm and tower will increase, causing se...

AI Technical Summary

Problems solved by technology

[0002] Under the influence of different climatic conditions, transmission lines, especially UHV transmission lines, will have different motion amplitudes and frequencies, mainly high-frequency slight-amplitude breeze vibration, medium-frequency and medium-amplitude sub-gap oscillation, and low-frequency large-amplitude galloping Generally speaking, the movement of transmission wires includes three-degree-of-freedom movements such as horizontal, vertical, and twisting. Horizontal and vertical motions can be collectively referred to as translational motions. The axial stress increases and the fatigue limit decreases, which can easily lead to wire breakage; at the same time, the load on the insulator string, cross arm and tower will increase, causing serious disasters such as insulator swing, cross arm deformation, and tower tilting, which pose a threat to the safe and stable operation of the power grid. Great threat, will also directly cause losses to the national economy

[0003] The existing wire movement dampers have their own advantages and disadvantages: the double pendulum damping releaser is suitable for split wires, easy to install, and has a good anti-vibration effect; the interphase spacer can be applied to transmission lines with a voltage level of 220kV and below, or higher voltages Class compact lines have problems such as aging, discharge, and bending, and the large-amplitude anti-vibration effect is better; the turbulence damping releaser is mainly used in areas with thin ice, and the application of single wires is more than that of split wires. The vibration device is light in weight, easy to install, and has the problems of aging and deterioration; the eccentric weight is suitable for split wires, pay attention to the influence of breeze vibration, and the anti-vibration effect is better; the detuning pendulum is effective for single wires, The application of the pressure damping release device needs to be studied; the pressure damping release device is convenient to obtain materials, can suppress the breeze vibration, has a large degree of freedom, and is prone to disturbance; Rods are more expensive than ordinary 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 damping releasers all have a common shortcoming, that is, the motion energy of the wire does not It cannot be released completely and quickly, and some parts will return to the conductor, causing mutual interference movement, and even accelerating the damage to the transmission line

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