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A ground wire lifter for high-voltage transmission lines

A technology for lifting high-voltage transmission lines and ground wires, applied in the direction of overhead lines/cable equipment, etc., can solve problems such as difficult and fast construction, labor, displacement, etc., achieve the effect of convenient and fast operation, reduce labor intensity and operation risk

Active Publication Date: 2017-05-03
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in practical applications, the lightning current on the overhead ground wire will cause burns, burn the hanging point fittings, cause corrosion and damage of the fittings, and deteriorate the insulators that insulate the overhead ground wire, thus making the installation of the overhead ground wire unstable; moreover, due to The suspension distance of the overhead ground wire is short, and when the spans on both sides are seriously uneven, the suspension clamps of the overhead ground wire often shift, deflect, etc., resulting in broken strands of the ground wire at the suspension of such spans, inconsistent arc sag, ground Even when using good conductors such as steel-cored aluminum stranded wire, it is easy to damage and break the outer layer of aluminum strands, thereby affecting the safe and reliable operation of the transmission line. Therefore, in order to avoid the above problems, it is necessary to periodically Overhead ground wires are overhauled. At this time, it is necessary to lift the overhead ground wires to replace or maintain the corresponding fittings, insulators and other components. It is laborious to lift the overhead ground wires manually, and due to space constraints, it is difficult to quickly construct

Method used

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  • A ground wire lifter for high-voltage transmission lines
  • A ground wire lifter for high-voltage transmission lines
  • A ground wire lifter for high-voltage transmission lines

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 1 As shown, it is a schematic structural diagram of an embodiment of a ground wire lifter for a high-voltage transmission line in the present invention. At figure 1 With the structure shown, the ground wire lifter of this embodiment may include: a lead screw 100 , a wire lifting hook 200 arranged at the bottom of the lead screw 100 , a lead screw 200 arranged at the top of the lead screw 100 and threadedly connected with the lead screw 100 . The rod seat 300, wherein the position of the screw seat 300 and the iron tower cross arm angle steel 400 is relatively fixed, the lead screw handle 500 arranged on the lead screw seat 300, and the fixing clip 600 arranged on the iron tower cross arm angle steel 400, wherein , the lead screw 100 passes through the fixing clip 600 , and the fixing clip 600 is located between the lead screw seat 300 and the thread lifting hook 200 .

[0034] In practical application, according to the specific structure of the iron tow...

Embodiment 2

[0040] Such as figure 1 and 2 As shown, on the basis of the first embodiment above, when the iron tower cross-arm angle steel 400 on the straight pole tower of the 110kv~1000kv high-voltage transmission line is an L-shaped angle steel, the fixing clip 600 may specifically include:

[0041] The first L-shaped hanging plate 611 attached to the outside of the L-shaped angle steel 400, and the second L-shaped hanging plate 612 attached to the inside of the L-shaped angle steel 400, wherein:

[0042] The horizontal plate of the first L-shaped hanging plate 611 is fixed to the horizontal plate of the second L-shaped hanging plate 612, the vertical plate of the first L-shaped hanging plate 611 is fixed to the vertical plate of the second L-shaped hanging plate 612, and the leading screw 100 A horizontal plate that runs through the first L-shaped hanging plate 611 .

[0043] In practical application, when the iron tower cross-arm angle steel 400 is an L-shaped angle steel, such as fi...

Embodiment 3

[0054] Such as image 3 As shown, on the basis of the first embodiment above, when the iron tower cross-arm angle steel 400 on the straight pole tower of the 110kv~1000kv high-voltage transmission line is a T-shaped angle steel, the lead screw 100 includes a first lead screw 111 and a second lead screw 112 , the fixing clip 600 includes: a third L-shaped hanging plate 621, a fourth L-shaped hanging plate 622 and a first inline hanging plate 623, wherein:

[0055] The lower surface of the first one-shaped hanging plate 623 is attached to the upper surface of the T-shaped angle steel 400, and the T-shaped angle steel 400 is erected on the third L-shaped hanging plate 621 and the fourth L-shaped hanging plate 622, and the third L-shaped The side faces of the longitudinal plate of the hanging plate 621 and the side faces of the longitudinal plate of the fourth L-shaped hanging plate 622 are attached to the two opposite sides of the longitudinal plate of the T-shaped angle steel 40...

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Abstract

The invention provides a ground wire lifter for a high-tension transmission line. A fixing clamp is arranged on iron tower cross arm angle iron, a screw rod penetrates through the fixing clamp, due to the fact that a screw rod seat connected with the screw rod in a screw-thread fit mode is arranged on the top of the screw rod and the fixing clamp is located at the screw rod seat and a wire lifting hook arranged at the bottom of the screw rod, it is ensured that the screw rod cannot disengage from the fixing clamp, and when an overhead ground wire needs to be lifted, only a screw rod handle arranged on the screw rod seat needs to be rocked. Thus, hardware fittings at the end of a cross arm do not bear force, workers can overhaul or replace the hardware fittings, operation is convenient and fast, the workers do not need to lift up the overhead ground wire, and labor intensity is lowered.

Description

technical field [0001] The invention mainly relates to the technical field of construction tools for power transmission overhead lines in electric power systems, in particular to a ground wire lifter for high-voltage transmission lines. Background technique [0002] At present, power transmission lines in mountainous and hilly areas usually use insulators and corresponding fittings to suspend conductors and overhead ground wires on poles and towers to connect power plants and substations, so as to realize the transmission of electric energy. Among them, the overhead ground wire is mainly used to protect the overhead transmission line conductors from lightning strikes. Specifically, it uses its own lightning current leakage characteristics to reduce or prevent the conductors from being directly affected by atmospheric overvoltage. [0003] However, in practical applications, the lightning current on the overhead ground wire will cause burns, damage to the hanging point fittin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02G1/02
Inventor 金伟俊汪勇军吴发献杨柯倪嘉伟王辰崔恒军钱卡娜
Owner STATE GRID CORP OF CHINA