Overhead lines

Abstract

The invention relates to an overhead line. The overhead line mainly comprises an insulating sleeve, steel cores and aluminum lines, wherein the lower surface of the insulating sleeve is a flat and straight surface; the upper surface of the insulating sleeve is an arc-shaped surface; the arc-shaped surface is symmetrical with respect to the median section of the flat and straight surface; the steel cores penetrate into the left side and the right side in the insulating sleeve symmetrically; the aluminum lines wrap the outer periphery of the steel cores. According to the overhead line, the weight of the overhead line can be effectively reduced; high-efficiency radiating can be realized; cable vibration can be weakened; accumulated snow on a cable can be blown off autonomously; therefore, large-span and safer electricity transmission can be realized by the overhead line.

Description

technical field [0001] The present invention relates to a cable, in particular to an overhead line. Background technique [0002] At present, overhead lines are used for long-distance power transmission, and towers are used to support the overhead lines at a certain height, which can realize efficient long-distance power transmission without affecting normal traffic on the ground; common overhead lines use split conductors, and this structure can Transmission of large electric energy, and less electric energy loss, but the overhead line of this structure will generate more heat in the circuit during the power transmission process, especially when the temperature is high in summer, it is easy to cause aging and damage to the outer insulation of the cable, posing a greater safety hazard In addition, because the overhead line is erected at a high altitude, when the air blows the cable, the cable will vibrate in the vertical direction due to the turbulent flow area on the leewar...

AI Technical Summary

Problems solved by technology

[0002] At present, overhead lines are used for long-distance power transmission, and towers are used to support the overhead lines at a certain height, which can realize efficient long-distance power transmission without affecting normal traffic on the ground; common overhead lines use split conductors, and this structure can It can transmit large electric energy with less electric energy loss, but the overhead line with this structure will generate more heat in the circuit during the power transmission process, especially when the temperature is high in summer, it is easy to cause aging and damage to the outer insulation of the cable, which poses a great safety hazard In addition, because the overhead line is erected at a high altitude, when the air blows the cable, the cable will vibrate in the vertical direction due to the turbulent flow area on the leeward side of the cable. When the vibration is transmitted to the tower, the screws on the tower will be loosened. Long, it is easy to cause safety accidents; when the cable is laid in a long span, the cable will generate a large pulling force on the tower. Due to the heavy weight of the overhead line itself, the traditional overhead line cannot achieve large-span power transmission. When long-distance power transmission , many towers need to be erected, which seriously increases social costs and takes up too much space

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