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Composite rotary cross arm

A cross-arm and composite insulator technology, applied in the field of cross-arm, can solve the problems of wind deflection, easy corrosion, pollution flashover of transmission lines, etc. Effect

Active Publication Date: 2013-12-11
POWERCHINA HEBEI ELECTRIC POWER SURVEY & DESIGN INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, most of the towers of transmission lines above 110kV in my country adopt all-steel structures, but the steel has defects such as heavy weight, easy to rust or crack, and there are also problems such as difficulties in construction, transportation, operation and maintenance; moreover, transmission lines with all-steel structures are easy to Faults and accidents such as pollution flashover and wind deflection discharge

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as figure 1 A preferred embodiment of the composite rotating cross arm of the present invention is shown, which mainly includes post insulators 3 and composite insulators 5 . The post insulator 3 and the composite insulator 5 are respectively arranged on the tower body 1 through hinge parts, the post insulator 3 is horizontally hinged on the tower body 1, and is vertically arranged with the tower body 1, the composite insulator 5 is obliquely hinged with the tower body 1, and the composite insulator 5 The ends merge with the ends of the post insulators 3 and are connected by hanging wire clamps 4 . When the composite rotating cross-arm is installed on a 110kV voltage level high-voltage line, the length of the post insulator 3 is greater than 1 meter, so as to meet the lightning overvoltage, the design of the minimum gap between the live part and the tower frame, and the 110kV voltage level high-voltage line is 1 meter lightning overvoltage clearance. When the com...

Embodiment 2

[0033] Such as figure 2As shown, the composite rotating cross arm in this embodiment is installed on the steel pole tower, and the post insulator 3 and the composite insulator 5 are hinged on the same busbar of the tower body 1 . The difference from Embodiment 1 is that: the hinge parts between the post insulator 3 and the composite insulator 5 and the tower body 1 include an annular hoop 9 mounted on the tower body 1 and fastened by bolts, and the hoop 9 is opposite to the side where the bolts are arranged. Two mounting ears 10 facing up and down are provided, and a hinge shaft 8 is provided between the two mounting ears 10 , and stiffeners are also provided between the mounting ears 10 . A hinge 7 is installed on the hinge shaft 8, and the setting form of the hinge 7 is the same as that of Embodiment 1. The other end of the hinge 7 is provided with a hanging plate 6 perpendicular to the hinge 7 for connecting the post insulator and the composite insulator. The hanging plat...

Embodiment 3

[0035] Different from Embodiment 2, the composite rotating cross arm described in this embodiment is installed on a square iron tower with an angle steel structure, and the post insulator 3 and the composite insulator 5 are connected in the vertical plane where the midline of one side of the square iron tower is located, and the post insulator 3 and composite insulator 5 and the hinge parts of the square iron tower adopt the same design as that of embodiment 1. The difference from Embodiment 1 is that in order to reduce the insulation length, this embodiment extends part of the post insulator 3 into the interior of the square iron tower, so that the hinged ends of the post insulator 3 and the composite insulator 5 are on the same plumb line . Specifically, the composite insulator 5 is hinged to the center line of one side of the square iron tower. A connecting frame is welded or bolted inside the square iron tower. The connecting frame is located directly below or slightly be...

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Abstract

The invention discloses a composite rotary cross arm. The composite rotary cross arm comprises a supporting insulator and a composite insulator, wherein the supporting insulator and the composite insulator are hinged to the same side of a tower body; the supporting insulator is vertical to the tower body; the tail end of the composite insulator points to the tail end of the supporting insulator in an inclined manner, and the tail end of the composite insulator is connected with the tail end of the supporting insulator through a wire hanging clipper connected with a ground wire; the supporting insulator is arranged below the composite insulator, and an included angle between the supporting insulator and the composite insulator is 30-45 degrees; components for hinging the supporting insulator and the composite insulator with the tower body comprise two steel angles arranged up and down, two sides, oppositely arranged, of the two steel angles are respectively provided with a hinging shaft, the other sides of the two steel angles are respectively and fixedly connected with the tower body, each hinging shaft is provided with a hinge, the other end of each hinge is provided with a hanging plate, and the hanging plates are vertical to the hinges and are used for respectively connecting the supporting insulator and the composite insulator. The composite rotary cross arm disclosed by the invention has the advantages of simple structure, convenience in implementation, reasonable design, light weight and effective protection on the main body of a tower.

Description

technical field [0001] The invention relates to a cross-arm on a high-voltage transmission line, in particular to a rotating cross-arm of composite material. Background technique [0002] At present, most of the towers of transmission lines above 110kV in my country adopt all-steel structures, but the steel has defects such as heavy weight, easy to rust or crack, and there are also problems such as difficulties in construction, transportation, operation and maintenance; moreover, transmission lines with all-steel structures are easy to Faults and accidents such as pollution flashover and wind deflection discharge occur. [0003] With the development of composite material technology and its manufacturing process, it has become possible to use composite material towers for transmission lines. Composite materials have the characteristics of light weight, high specific strength, corrosion resistance, high and low temperature resistance, and insulation. The use of composite mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04H12/24
Inventor 赵辉周乾王强王延杰赵贞欣汪延寿
Owner POWERCHINA HEBEI ELECTRIC POWER SURVEY & DESIGN INST CO LTD
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