Composite insulator V-shaped overhung string for overhead transmission line

A technology of overhead transmission lines and composite insulators, applied in the direction of suspension/strain insulators, etc., can solve the problems of composite insulator V-shaped suspension series assembly form is not perfect, and achieve the effect of solving torsion, reducing mechanical load, and avoiding axial torsion

Inactive Publication Date: 2015-01-07
STATE GRID CORP OF CHINA +5
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, the assembly form of the composite insulator V-shaped suspension string is not perfect

Method used

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  • Composite insulator V-shaped overhung string for overhead transmission line
  • Composite insulator V-shaped overhung string for overhead transmission line

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Example 1: A V-shaped suspension string of composite insulators for overhead transmission lines (see figure 1 ), which includes connecting fittings and composite insulator strings. The connecting fittings are composed of a connecting plate 7 and a suspension clamp 8. The connecting plate 7 is a 3-hole connecting plate. Each hole is respectively connected to a composite insulator string, and the two composite insulator strings are suspended in a V shape with an included angle α of 80° to 100°. Each composite insulator string includes in order from the grounding end to the live end: 1 pair of inner arc U-rings of the tower 1, 1 pair of ordinary inner arc U-rings 2, 1 pair of extension rods 3, 2 pairs of inner arcs connected by rings Arc U-shaped ring 2, 1 pair of ball head hanging ring 4, ball socket, composite insulator with ball head structure 5, W-shaped bowl head hanging plate 6, 2 pairs of inner arc U-shaped rings connected by rings and rings 2, joint towers Inner a...

Embodiment 2

[0012] Example 2: A V-shaped suspension string of composite insulators for overhead transmission lines (see figure 2 ), its structure is basically the same as that of Embodiment 1, the difference is that the connecting plate 7 is a rectangular connecting plate with 4 holes, and the lower end hangs a double-split wire suspension clamp 8.

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Abstract

The invention discloses a composite insulator V-shaped overhung string for an overhead transmission line. The composite insulator V-shaped overhung string is characterized by comprising yoke plates (7), an overhung wire clamp (8) and composite insulator string bodies, the included angle alpha between the two composite insulator string bodies ranges from 80 degrees to 100 degrees, each composite insulator string body comprises a twin-pylon inner arc U-shaped ring (1), a regular inner arc U-shaped ring (2), a lengthened pull rod (3), two connected inner arc U-shaped rings (2), a ball eye (4), a ball socket, a composite insulator (5) which is of a ball head structure, a W-shaped socket clevis (6) and two connected inner arc U-shaped rings (2) from the grounded end to the live end in sequence, and the inner arc U-shaped rings (2) are connected with the yoke plates (7). According to the composite insulator V-shaped overhung string, the two V-shaped overhung string bodies can both rotate by +/-10-20 degrees in the axial direction, so that the situation that the mechanical strength of a core rod and hardware fittings at the end of the core rod is affected due to axial rotation of the composite insulator under the condition of waving of the line coated with ice or a hurricane is avoided, and the situation that a ball head disengages from the ball socket under the condition that wind speed is higher than the designed wind speed is also avoided.

Description

Technical field: [0001] The invention relates to a V-shaped suspension string of composite insulators for 110-220 kV overhead transmission lines, which belongs to the field of design, operation and maintenance of overhead transmission lines in power systems. Background technique: [0002] So far, the standard materials of the composite insulator V-shaped suspension strings of the State Grid Corporation of China for public bidding are all conventional types. When composite insulators are used in series, clamps should be installed on the periphery of the bowl head of the fittings to prevent the ball head from falling out of the ball socket caused by wind swaying. According to the report of the operating unit, the added clamp is easy to loosen after a long period of vibration; in addition, the additional clamp loses the connecting function of the ball head and the ball socket. Obviously, the assembly form of the V-shaped suspension string of composite insulators is not perfect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B17/04H01B17/10
Inventor 张波王茂成王勇王硕王星涵闫冬李文博
Owner STATE GRID CORP OF CHINA
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