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A composite insulator tension string for overhead transmission lines

A technology for overhead transmission lines and composite insulators, applied in circuits, insulators, suspension/strain insulators, etc., can solve the problems of mechanical performance decline, weaken the connection strength between mandrel and end fittings, etc., to ensure the effect of 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 composite insulator tension string for overhead transmission lines
  • A composite insulator tension string for overhead transmission lines
  • A composite insulator tension string for overhead transmission lines

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1, a kind of overhead transmission line composite insulator single conductor tension string (see figure 1 ), which includes two composite insulators 1, one end of each composite insulator 1 is provided with a ball-and-socket structure 2, and the other end is provided with a ball-joint structure 3, and the ball-and-socket structure 2 is connected to the grounding end fittings string, and the grounding end fittings string is composed of QP The inner arc U-shaped ring 12, the two-joint plate 9, the U-shaped ring 12, the extension ring 16, and the U-shaped ring 12 connected by the type ball head hanging ring 4, the ring-ring are connected successively to form, and each pair of ring-rings connected The inner arc U-shaped rings 12 are all connected with the two-joint plate 9, the two-joint plate 9 is connected with a U-shaped ring 12, the U-shaped ring 12 is connected with an extension ring 16, and the extension ring 16 is connected with a U-shaped ring 12, and the ...

Embodiment 2

[0017] Embodiment 2, a kind of overhead power transmission line composite insulator single conductor strain string (see figure 2 ), which includes two composite insulators 1, one end of each composite insulator 1 is provided with a ball-and-socket structure 2, and the other end is provided with a ball-joint structure 3, and the ball-and-socket structure 2 is connected to the grounding end fittings string, and the grounding end fittings string is composed of QP Type ball head hanging ring 4, right-angle hanging plate 15, two-joint plate 9, U-shaped ring 12, extension ring 16, U-shaped ring 12 are sequentially connected to form, and each right-angle hanging plate 15 is connected with two-joint plate 9, and the two-joint The plate 9 is connected with a U-shaped ring 12 , the U-shaped ring 12 is connected with an extension ring 16 , and the extension ring 16 is connected with a U-shaped ring 12 , and the QP type ball head hanging ring 4 is connected with the ball-and-socket struct...

Embodiment 3

[0018] Embodiment 3, a kind of overhead transmission line composite insulator single conductor tension string (see image 3 ), which includes two composite insulators 1, one end of each composite insulator 1 is provided with a ball-and-socket structure 2, and the other end is provided with a ball-joint structure 3, and the ball-and-socket structure 2 is connected to the grounding end fittings string, and the grounding end fittings string is composed of QP The inner arc U-shaped ring 12, the two-joint plate 9, the U-shaped ring 12, the extension ring 16, and the U-shaped ring 12 which are connected by two pairs of rings and rings are connected in sequence, and each ring-ring is connected in sequence. The connected inner arc U-shaped rings 12 are all connected to the two-joint plate 9, the two-joint plate 9 is connected to a U-shaped ring 12, the U-shaped ring 12 is connected to an extension ring 16, and the extension ring 16 is connected to a U-shaped ring 12. QP ball The head ...

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Abstract

The invention discloses a tension string of composite insulators for overhead transmission lines, which comprises two composite insulators (1), and is characterized in that one end of each composite insulator (1) is provided with a ball-and-socket structure (2), and the other end is provided with The ball head structure (3), the ball 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 the grounding end fittings string or the high voltage end fittings string are provided with at least two inner arc U-shaped The ring (12) and the inner arc U-shaped ring (12) are connected ring-to-ring. The invention enables the string of fittings to rotate axially at a certain angle by changing the connection mode between the fittings, thereby avoiding the axial torsion of the composite insulator. Destroy the connection strength between the mandrel and the end fittings.

Description

Technical field: [0001] The invention relates to a tension string of composite insulators for overhead transmission lines, belonging to the field of design, operation and maintenance of overhead transmission lines in power systems. Background technique: [0002] At present, all composite insulator tension strings in overhead transmission lines are mainly composed of composite insulators and line fittings, and are mainly divided into inner wedge type composite insulator tension strings and crimping type composite insulator tension strings. A group of 500kY 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 loads ...

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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