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Oval-cross-section type low-wind-pressure lead

A technology with elliptical cross-section and wires, which is applied in the direction of conductors, insulated conductors, and power cables with shielding layers/conductive layers, etc., can solve the problems of limited wind resistance effect and large capital investment, so as to improve wind resistance performance and reduce Wind pressure coefficient, practical effect

Inactive Publication Date: 2017-09-08
CHINA ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under strong wind conditions, relying solely on improving structural strength to reduce wind loads requires a large capital investment, and the wind resistance effect is limited

Method used

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  • Oval-cross-section type low-wind-pressure lead
  • Oval-cross-section type low-wind-pressure lead

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 1 As shown, a low wind pressure conductor with an elliptical cross-section, the cross section of the conductive single wire in the outer conductor is an equiangular shaped wire structure, that is, the conductive single wire in the outer conductor is twisted according to the number of angles equal to the cross section of the conductive single wire composed of arrays.

[0028] From the inside to the outside are the reinforcing core and the 3-layer conductive single wire twisted in the outer layer. The cross section of the conductive single wire formed by twisting the conductive single wire is oval, and the conductive single wire stranded in the outer layer is the inner layer conductor, the middle layer conductor and The outer layer conductor; the conductive single line section of the outer layer conductor is an equiangular shaped line structure. The inner-layer conductor and the middle-layer conductor are formed by twisting a conductive single-wire structu...

Embodiment 2

[0032] Such as figure 2 As shown, a low wind pressure wire with an elliptical cross section, the conductive single wire cross section in the outer conductor is a shaped wire structure with a constant cross section. That is to say, the conductive single wires in the outer conductor are twisted and arranged according to the equal cross-sectional area of ​​the conductive single wires.

[0033] From the inside to the outside are the reinforcing core and the 3-layer conductive single wire twisted in the outer layer. The cross section of the conductive single wire formed by twisting the conductive single wire is oval, and the conductive single wire stranded in the outer layer is the inner layer conductor, the middle layer conductor and The outer layer conductor; the cross section of the conductive single wire of the outer layer conductor is a profiled wire structure of equal cross section. The inner-layer conductor and the middle-layer conductor are stranded conductive single wire...

Embodiment 3

[0036] The utility model relates to a low-wind-pressure wire with an elliptical cross-section. The cross-section of the conductive single wire in the outer conductor is a molded wire structure with a constant cross-section. That is to say, the conductive single wires in the outer conductor are twisted and arranged according to the equal cross-sectional area of ​​the conductive single wires.

[0037] From the inside to the outside are the reinforcing core and the 4-layer conductive single wire twisted in the outer layer. The cross section of the conductive single wire formed by twisting the conductive single wire is oval, and the conductive single wire stranded in the outer layer is the inner layer conductor, the middle layer conductor and The outer layer conductor; the cross section of the conductive single wire of the outer layer conductor is a profiled wire structure of equal cross section. The inner-layer conductor and the middle-layer conductor are formed by twisting a con...

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Abstract

The present invention provides an oval-cross-section type low-wind-pressure lead. The lead sequentially comprises one to multiple layers of conductive single wires twisted with an intensified core and an outer layer from inside to outside. The conductive single wires are twisted to form a lead and the cross section of the lead is oval. The conductive single wires twisted with the outer layer comprise an inner-layer conductor, a middle-layer conductor and an outer-layer conductor. The aspect ratios of the cross sections of the conductive single wires of the inner-layer conductor and the middle-layer conductor are 1.25-1.5, wherein the conductive single wires are molded wires and the cross sections of the inner-layer conductor and the middle-layer conductor are circular. The cross sections of the conductive single wires of the outer-layer conductor are uniform in angle or in cross section, and the conductive single wires of the outer-layer conductor are molded wires. According to the technical scheme of the invention, the single wires of the outer-layer conductor, at the long axis of the oval cross section of the lead, are rounded off, so that the cross-sectional areas of the single wires of the lead of a molded lead structure can be better controlled. The roughness of the surface of the lead is increased. The wind pressure resistance of the lead is improved. The low-wind-pressure lead is better in aerodynamic characteristics, and the wind pressure coefficient can be obviously reduced. The advantages of low wind pressure, low noise and the like are realized. The oval-cross-section type low-wind-pressure lead is simple in manufacture and construction process, convenient in operation, strong in practicability and low in production cost.

Description

technical field [0001] The invention relates to a wire, in particular to a low-wind-pressure wire with an elliptical cross-section. Background technique [0002] Overhead transmission lines send electric energy from the power generation end to the power receiving end through wires, and inevitably consume part of the energy while transmitting electric energy. Most of my country's power generation bases are concentrated in the west, and the load center of electricity consumption, the main Cities, industrial and mining enterprises are concentrated in the eastern coastal area, and long-distance large-scale power transmission is even more important for line energy conservation and reduction of energy consumption. [0003] With the implementation of my country's west-to-east power transmission strategy, more and more transmission lines pass through the northwest windy area, and the northwest windy condition puts forward higher requirements for the safety and reliability of transmis...

Claims

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Application Information

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IPC IPC(8): H01B7/17H01B7/18H01B7/28H01B7/29H01B7/00H01B9/02
CPCH01B7/17H01B7/00H01B7/18H01B7/28H01B7/2806H01B7/29H01B9/02
Inventor 朱宽军刘臻周立宪王召林杨长龙刘胜春刘彬刘芮彤刘龙李冬青司佳钧张军李新民杨加伦尹泉齐翼杨滢璇
Owner CHINA ELECTRIC POWER RES INST
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