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Cable spacer assisting in slowing down high-altitude cable vibration

A high-altitude cable and spacer technology, which is used in cable installation, mechanical vibration attenuation devices, electrical components, etc., can solve the problems of easy aging of rubber, little effect, damage to wires and transmission lines, etc.

Active Publication Date: 2020-09-15
ZHONGWANG ELECTRIC POWER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

All three types of vibration can cause damage to conductors and transmission lines
[0005] The existing damping spacer uses rubber as a damping material at the movable joints of the spacer to consume the vibration energy of the wire. However, in the harsh outdoor environment, the rubber is very easy to age, and the spacer needs to be replaced regularly. In the long run, the cost is relatively high. High, in addition, the damping coefficient of the existing damping spacer is fixed and cannot be changed once it is installed, but the external environment, especially the wind environment that causes the cable to vibrate, the range of wind force changes is extremely large, and the rubber with a small damping coefficient It has little effect when the wind force is strong and the cable swings or dances greatly; the rubber with a large damping coefficient has little effect when the wind force is small and the cable generates breeze vibration
It is difficult to adjust the most suitable damping coefficient according to the difference in wind force and cable vibration, especially the existing spacers have little effect on the dancing of the cable

Method used

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  • Cable spacer assisting in slowing down high-altitude cable vibration
  • Cable spacer assisting in slowing down high-altitude cable vibration
  • Cable spacer assisting in slowing down high-altitude cable vibration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0037] see image 3 and 4 , the inductance mechanism includes a strip-shaped helical coil 41; the helical coil 41 is wound outside the high-altitude cable 6 along the outer circumference of the high-altitude cable 6, so that the plane formed by any single coil body of the helical coil 41 generally faces The tangential direction of the aerial cable 6; the helical coil 41 and the power supply circuit form a closed loop. The structure 5 includes two hollow semi-annular parts, wherein the hollow part forms a semi-annular placement cavity 51; the helical coil 41 is placed at the bottom of the placement cavity 51, and a semi-annular partition block whose vertical section is "concave" 52 is embedded in the placement cavity 51, its outer side is against the inner end of the placement cavity 51, and its inner side is in contact with the surface of the overhead cable 6.

Embodiment approach 2

[0039] see Figure 5 and 6 , the inductance mechanism includes a plurality of disconnected ring conductors 42 arranged outside the high-altitude cable 6 and arranged along the outer circumference of the high-altitude cable 6; the plane formed by any ring conductor 42 is generally toward the tangential direction of the high-altitude cable 6; The conductors 42 are sequentially connected in series to form a closed loop with the power supply circuit. The purpose of the series connection is to effectively stabilize the induced current because the series circuit current is equal everywhere. Secondly, the magnetic flux effects of a plurality of ring conductors 42 can be formed as a whole. Improve inductor efficiency. The structure 5 includes two hollow semi-annular parts, wherein the hollow part forms a semi-annular placement cavity 51; the helical coil 41 is placed at the bottom of the placement cavity 51, and a semi-annular partition block whose vertical section is "concave" 52 i...

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PUM

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Abstract

The invention discloses a cable spacer assisting in slowing down high-altitude cable vibration. The cable spacer comprises a supporting body with at least two supporting arms and a clamping body arranged at the tail ends of the supporting arms of the supporting body and used for clamping a cable. Supporting arms of the supporting body are of telescopic structures, and each supporting arm comprisesa sleeve and a telescopic rod which is sleeved with the sleeve in a sealed and sliding mode. A piston is arranged at the end, sleeved with the sleeve, of the telescopic rod. The piston divides the sleeve into a front cavity close to the center of the support body and a rear cavity far away from the center of the support body. A plurality of through holes communicated with the front cavity and therear cavity are formed in the piston. A small amount of energy is obtained in a non-contact manner to control the viscosity of the electrorheological fluid in each support arm. Therefore, the dampingcoefficient of each support arm of the spacer is adjusted respectively, the spacer has controllable damping in three dimensions of rotation, expansion and torsion, vibration of the cable can be absorbed in each direction, and the spacer can adapt to and relieve vibration modes of various cables such as high-frequency micro-amplitude breeze vibration, medium-frequency medium-amplitude subspan vibration and low-frequency large-amplitude galloping.

Description

technical field [0001] The invention belongs to the technical field of cable maintenance, in particular to a cable spacer rod for assisting in slowing down the vibration of high-altitude cables. Background technique [0002] High-altitude cables carry the heavy responsibility of long-distance power transmission. They are blood vessels for economic development, industrial production, and residential electricity consumption. During this process, it will be attacked by various bad weather, especially the cable vibration caused by external wind or ice coating. Cable vibration refers to the periodic motion of the conductor. According to the difference in frequency and amplitude, the vibration of the wire can be roughly divided into three types: high-frequency and slight-amplitude breeze vibration, medium-frequency and medium-amplitude sub-gap vibration, and low-frequency and large-amplitude galloping. All three types of vibration will cause damage to conductors and transmission...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02G7/12H02G7/14
CPCH02G7/125H02G7/14
Inventor 金浩金宝洁戴友兵陈越
Owner ZHONGWANG ELECTRIC POWER TECH CO LTD
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