A pre-twisted anti-skid damping spacer

Abstract

The invention relates to a pre-twisted anti-slip damping spacer bar. It includes a bracket and a wire clip, the wire clip is arranged at the end corner of the bracket for connecting the split wire, and the wire clip also includes a pre-twisted wire; the head end of the wire clip used to connect the split wire is hook-shaped, The back of the hook is provided with a positioning structure for positioning the pre-twisted wire; the tail end of the clamp is connected to the corner of the bracket through a damping and limiting device. The invention can be installed by bare hands, has the advantages of convenient installation, good reliability and easy control of installation quality.

Description

Technical field [0001] The invention relates to a spacer rod for ultra-high voltage and ultra-high voltage transmission lines, in particular to a pre-twisted anti-skid damping spacer rod. Background technique [0002] For long-distance, large-capacity UHV and UHV transmission lines, each phase conductor uses two, three, four, six, eight or more split sub-conductors. In order to meet the electrical performance, reduce the surface potential gradient, and in the case of a short circuit, electromagnetic force will not be generated between the wire harnesses to cause mutual attraction, collision, whiplash, or instant relative motion, but after the accident is eliminated, it can be restored to the design spacing state , It is necessary to ensure that the spacing between the sub-conductors of the split wire harness remains unchanged, for this reason, install spacers of appropriate specifications and numbers at appropriate positions in the span. The installation of wire spacers can also...

AI Technical Summary

Problems solved by technology

[0004] However, because the wire is in the natural environment in the wild, the temperature changes with the seasons, and the thermal expansion and cooling of the wire will change the diameter of the wire, which will affect the holding force of the spacer to the wire to a certain extent; During operation, due to a variety of factors, its operating temperature also has a large change. The effect of this temperature change is similar to a thermal cycle, and it may eventually cause the clamp to hold the wire due to a drop in the bolt torque. Focus on descending

The decline of the holding force of the spacer on the conductor may directly affect the possible slippage of the spacer, which will cause the spacer to deviate from the optimal installation position of the design, thus failing to achieve the designed effect of fixing the conductor and protecting the line , and may even bring new dangerous vibrations and stress increases to the wires at a certain moment where the spacer bar is located, and even lead to faster fatigue of the wires, resulting in serious accidents and losses such as line damage

[0005] In addition, because the traditional spacer adopts a collet-type structure, the clamping and holding of the wire by the spacer is realized by bolts and nuts, fastening clamps and glands, and the force-bearing surface of the wire is limited to the clamp. Within the width, usually tens of millimeters, the stress area is too small, and there is a safety addiction to damage the wire due to stress concentration

The collet structure of the traditional spacer requires bolts and nuts to fix the clip body on the wire. Since the bolts and nuts are used, the installation torque must be strictly controlled during installation. Otherwise, the spacer may be damaged due to the small installation torque. The clamping of the wire is too loose, which leads to the substandard holding force of the spacer, or the clamping of the spacer to the wire by the spacer is too tight due to excessive installation torque, resulting in excessive extrusion of the wire and damage to the wire or damage to the spacer itself , there are security risks

The traditional spacer is installed on the wire by means of bolts and nuts. During the installation stage, the installation operator needs to bring corresponding tools (such as: torque wrench, etc.) to climb to the tower to perform high-altitude operations. The workload is heavy and the work efficiency is low. ;In the acceptance stage, in order to accurately check whether the installation torque of each clamp or even each bolt meets the requirements, technicians have to climb up the tower one by one, and measure the installation torque of the spacers one by one. The workload is heavy and the work intensity High, the work is difficult and dangerous

If the operator is not careful during the installation process, the bolts and nuts may fall from the tower, which may cause the bolts and nuts to fall into the grass or valley and be lost, or hit the staff assisting under the tower and cause a safety accident

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