A suspension string of composite insulators for overhead transmission lines

A technology for overhead transmission lines and composite insulators, which is applied in the direction of circuits, insulators, suspension/strain insulators, etc., which can solve the problems of mechanical performance degradation, weakening the connection strength of mandrel and end fittings, etc., and achieve the effect of ensuring mechanical performance

Inactive Publication Date: 2011-12-14
YANTAI POWER SUPPLY COMPANY OF STATE GRID SHANDONG ELECTRIC POWER +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the immature manufacturing process of the inner wedge type, so far, most of the crimped composite insulators have been used, so that the mechanical performance of the crimped composite insulators during operation is inevitable.
And the above structure causes the composite insulator composed of flexible material to be twisted at a small angle under various unfavorable working conditions, thus weakening the connection strength between the mandrel and the end fittings

Method used

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  • A suspension string of composite insulators for overhead transmission lines
  • A suspension string of composite insulators for overhead transmission lines
  • A suspension string of composite insulators for overhead transmission lines

Examples

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Effect test

Embodiment 1

[0022] Embodiment 1, a kind of overhead transmission line composite insulator single wire suspension string (see figure 1 ), which includes a composite insulator 1. The upper end of the composite insulator 1 is provided with a ball socket structure 2, and the lower end is provided with a ball joint structure 3. The ball socket structure 2 is connected to the grounding terminal fittings string, and the grounding terminal fittings string is connected by a QP type ball joint hanging ring 4 and the UB hanging plate 5 are connected to form, and the QP type ball joint hanging ring 4 is connected with the ball-and-socket structure 2. The ball head structure 3 connects the high-voltage end fittings string, and the high-voltage end fittings string consists of a bowl head hanging plate 6, an inner arc U-shaped ring 12 connected by two rings, a PD hanging plate 13, and a suspension clamp 7 (holding the wire) The structure is connected in turn, and the bowl head hanging plate 6 is connect...

Embodiment 2

[0023] Embodiment 2, a kind of overhead transmission line composite insulator single wire suspension string (see figure 2 ), which includes a composite insulator 1. The upper end of the composite insulator 1 is provided with a ball socket structure 2, and the lower end is provided with a ball joint structure 3. The ball socket structure 2 is connected to the grounding terminal fittings string, and the grounding terminal fittings string is connected by a QP type ball joint hanging ring 4 is connected with two inner arc U-shaped rings 12 connected by ring-ring, and the QP type ball joint hanging ring 4 is connected with the ball-and-socket structure 2. The ball head structure 3 is connected to the high-voltage end fittings string, and the high-voltage end fittings string is formed by sequentially connecting the bowl head hanging plate 6 and the suspension wire clamp 7 , and the bowl head hanging plate 6 is connected to the ball head structure 3 .

Embodiment 3

[0024] Embodiment 3, a kind of overhead transmission line composite insulator single wire suspension string (see image 3 ), which includes a composite insulator 1. The upper end of the composite insulator 1 is provided with a ball socket structure 2, and the lower end is provided with a ball joint structure 3. The ball socket structure 2 is connected to the grounding terminal fittings string, and the grounding terminal fittings string is connected by a QP type ball joint hanging ring 4 is connected with two inner arc U-shaped rings 12 connected by ring-ring, and the QP type ball joint hanging ring 4 is connected with the ball-and-socket structure 2. The ball head structure 3 connects the high-voltage end fittings string, and the high-voltage end fittings string consists of a bowl head hanging plate 6, an inner arc U-shaped ring 12 connected by two rings, a PD hanging plate 13, and a suspension clamp 7 (holding the wire) The structure is connected in turn, and the bowl head ha...

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Abstract

The invention discloses a suspension string of composite insulators for overhead transmission lines, which comprises a composite insulator (1), and is characterized in that the upper end of the composite insulator (1) is provided with a ball socket structure (2), and the lower end is provided with a ball head structure (3). , the ball-and-socket structure (2) is connected to the grounding end fittings string, the ball head structure (3) is connected to the high-voltage end fittings string, and at least two inner arc U-shaped rings (12) are arranged on the grounding end fittings string or the high-voltage end fittings string, and the inner The arc U-shaped ring (12) is connected ring-to-ring. The invention enables the string of fittings to be axially twisted at a certain angle by changing the connection mode between the fittings, so as to avoid the axial twisting of the composite insulator and damage the mandrel and the end. The joint strength of hardware.

Description

Technical field: [0001] The invention relates to a suspension string of composite insulators for overhead transmission lines, which belongs to the field of design, operation and maintenance of overhead transmission lines in power systems. Background technique: [0002] At present, all composite insulator suspension strings in overhead transmission lines are mainly composed of composite insulators and line fittings, and are mainly divided into inner wedge composite insulator suspension strings and crimp composite insulator suspension strings. A group of 500kV tensile composite insulators (#1~#15 are crimping type, #16~#27 are inner wedge type) conducted by Shandong Electric Power Research Institute in 2005. The ±10° tension and torsion test data show that: the end connection is compression The mechanical failure loads of the joint-type samples were reduced to varying degrees after the combined tension-torsion test (an average reduction of 5%), while the mechanical failure loa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B17/04H01B17/38
Inventor 王茂成姚建生
Owner YANTAI POWER SUPPLY COMPANY OF STATE GRID SHANDONG ELECTRIC POWER
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