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Break-proof method of insulator chain fracture caused by wind blowing

A technology of hanging insulators and insulator strings, which is applied in the installation of electrical components and cables, overhead installation, etc., and can solve the problems of poor vibration damping effect and unsatisfactory effect

Active Publication Date: 2013-07-24
ELECTRIC POWER RES INST STATE GRID JIANGXI ELECTRIC POWER CO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The anti-vibration hammer generally has two resonant frequencies, and the energy it consumes is related to the frequency and amplitude of the wire where it is installed. When the vibration frequency is 6-50Hz, the vibration elimination effect is better, and the vibration frequency of the wire is higher than 50Hz or lower than At 6Hz, the vibration elimination effect is not good, so the effect of controlling the vibration of the sub-gear is not ideal

Method used

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  • Break-proof method of insulator chain fracture caused by wind blowing
  • Break-proof method of insulator chain fracture caused by wind blowing
  • Break-proof method of insulator chain fracture caused by wind blowing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] figure 1 It is a structural schematic diagram of Embodiment 1 of the wind-induced fracture prevention device for insulator strings of the present invention.

[0029] Such as figure 1 As shown, fixing fittings 5 ​​and 6 are installed and fixed on the conductors 1 and 2 at a distance of 500 mm on the left and right sides of the suspension insulator string respectively. The fixing fittings are composed of two special fittings separated by 200 mm. The fittings are 1.5m wires, dampers 7 and 8 are arranged between the fixing fittings and the force transmission fittings; the fittings at the end of the insulator string 9 are provided with a "T"-shaped end 10, and the "T"-shaped end 10 is opened for The bolt hole 12 that is connected with the iron tower cross arm 11.

[0030] attached Figure 4 It is a structural schematic diagram of the force transmission fitting of the present invention. The force transmission fittings 3, 4 are composed of two clips, and the two clips are ...

Embodiment 2

[0034] figure 2 It is a structural schematic diagram of Embodiment 2 of the wind-induced fracture prevention device for insulator strings of the present invention.

[0035] The fixing fittings 5 ​​and 6 are respectively fixed on the wires 1 and 2 at a distance of 500 mm from the left and right sides of the hanging insulator string. The fixing fittings are composed of two special fittings separated by 200 mm. On the 1.2m wire, the fittings at the end of the insulator string 9 are provided with a "T"-shaped terminal 10, and the "T"-shaped terminal 10 is provided with a bolt hole 12 for connecting with the cross-arm 11 of the iron tower.

[0036] The dampers 7 and 8 are coil springs, disc springs or ring springs, as attached Figure 7 , 8 and 9.

[0037] The force transmission fittings 3 and 4, the fixing fittings 5 ​​and 6 and the end structures of the insulator strings are the same as in the first embodiment.

Embodiment 3

[0039] image 3 It is a structural schematic diagram of Embodiment 3 of the insulator string wind-induced fracture prevention device of the present invention.

[0040] Two pairs of damping systems consisting of force transmission fittings 3, 4, fixing fittings 5, 6 and dampers 7, 8 are respectively fixed on the conductors 1 and 2 on the left and right sides of the suspension insulator string, and the distance between the two pairs of damping systems is 2.5m.

[0041] The dampers 7 and 8 are coil springs, disc springs, ring springs or viscoelastic dampers.

[0042]The force transmission fittings 3 and 4, the fixing fittings 5 ​​and 6 and the end structures of the insulator strings are the same as in the first embodiment.

[0043] The force transmission fittings 3, 4 and fixing fittings 5, 6 and the insulator string end fittings "T" shaped end 10 described in the above-mentioned embodiment one to example three can all be manufactured by general machining methods or casting meth...

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Abstract

The invention provides a break-proof method of overhead transmission line suspension insulator chain fracture caused by wind blowing. According to the method, a left side lead (1) of an insulator chain is provided with a force transmission hardware fitting (3) and a fixing hardware fitting (5), a right side lead (2) of an insulator chain is provided with a force transmission hardware fitting (4) and a fixing hardware fitting (6), dampers (7, 8) are provided between the fixing hardware fittings and the force transmission hardware fittings to adsorb oscillation of the leads at two sides, especially energy of subspan oscillation; simultaneously, an end part hardware fitting of an insulator chain (9) is provided with a T shape tip (10), the T shape tip (10) is opened with a bolt hole (12) used for connecting with an iron tower cross-arm (11), a contact surface of connection is increased, thus connection between the insulator chain and the iron tower cross-arm is stable. According to the invention, on one hand lead oscillation energy can be effectively absorbed, on the other hand bending torque of an insulator chain end part is effectively reduced, structure is simple, cost is low, a service life is long, and a break-proof effect of the insulator chain is good. The method satisfies a break-proof demand of the overhead transmission line split lead system suspension insulator chain fracture caused by wind blowing, and is easy to realize.

Description

technical field [0001] The invention relates to a wind-induced fracture prevention method for an insulator string, belonging to the technical field of protection for overhanging insulators of power overhead transmission lines. Background technique [0002] In recent years, due to climate change, windy weather has gradually increased, which has brought a serious threat to the safe operation of overhead transmission lines. The vibration of transmission lines caused by strong winds has caused frequent insulator string breakage accidents. [0003] According to the difference in frequency and amplitude, the wind-induced vibration of overhead transmission lines is mainly divided into three types: namely, high-frequency and low-amplitude breeze vibration, medium-frequency and medium-amplitude sub-gap vibration, and low-frequency and large-scale galloping. Galloping rarely occurs, and the main influences on overhead transmission lines are breeze vibration and sub-gap vibration. The...

Claims

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Application Information

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IPC IPC(8): H02G7/00H02G7/14
Inventor 李波何可龙余海洪黎小秋
Owner ELECTRIC POWER RES INST STATE GRID JIANGXI ELECTRIC POWER CO
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