Disconnection-preventing parallel-connected gap device
A disconnection type, parallel technology, applied in spark gaps, spark gap parts, overvoltage arresters using spark gaps, etc., to avoid severe ablation and avoid disconnection.
Active Publication Date: 2015-02-18
STATE GRID CORP OF CHINA +1
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Problems solved by technology
[0005] The present invention overcomes the deficiencies in the prior art, and the technical problem to be solved is to provide a parallel gap lightning protection device for preventing disconnection of power distribution lines, which can effectively solve the problem of lightning disconnection of power distribution lines and can more accurately locate lightning strikes Flashover, simple structure, easy installation
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[0023] The drainage tube 1 is two hollow semi-cylinders with a horizontal length of about 80-100 mm, which are tightly fixed on the wire 4 by bolts at a distance of 230-260 mm from the axis of the insulator. The puncture 5 on the inner wall of the drainage tube 1 is a conical metal tip and many punctures of different sizes are arranged at intervals, such as Figure 2-3 As shown, set a large puncture after every three small punctures. The height of the large puncture is 20%-30% of the total diameter of the insulated wire. The interval of punctures is 3-6mm. Pierce the insulating layer and make close contact with the wire, leading to high potential;
[0024] The electrode 2 on the wire side is L-shaped at right angles, with a horizontal length of 180-220 mm and a vertical length of 15-20 mm. The horizontal end is provided with a steel ball, and the vertical upper end is fixedly connected to the drainage tube 1 through a nut;
[0025] The electrode 3 on the ground side is a zigz...
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Abstract
The invention relates to a disconnection-preventing parallel-connected gap device which belongs to the technical field of lightning protection of a distribution circuit, and aims at providing a disconnection-preventing parallel-connected gap lightning protection device for the distribution circuit, which can be used for effectively solving the problem of lightning stroke disconnection of the distribution circuit and more accurately positioning lightning stroke flashover and is simple in structure and convenient to install. The adopted technical scheme is as follows: the disconnection-preventing parallel-connected gap device comprises an drainage tube, a wire side electrode and a grounding side electrode, wherein the drainage tube tightly sleeves the wire, and the inner wall of the drainage tube is provided with a plurality of thorns which penetrate through an insulating layer; the horizontal end part of the right-angled L-shaped wire side electrode is provided with a sphere, and the vertical end part of the right-angled L-shaped wire side electrode is fixedly connected with the drainage tube; and one end of the grounding side electrode is provided with the sphere, the other end of the grounding side electrode is fixedly connected with the bottom end of an insulator, one end, which is close to the sphere, of the grounding side electrode is provided with a ridge-shaped convex folding line structure, and the electrode end parts of the wire side electrode and the grounding side electrode are absolutely aligned. The disconnection-preventing parallel-connected gap device disclosed by the invention is installed on an electric wire so as to be used for preventing the lightning stroke disconnection.
Description
technical field [0001] The invention relates to an anti-broken parallel gap device, which belongs to the technical field of lightning protection for power distribution lines. Background technique [0002] Most of the research on lightning hazards in domestic power systems focuses on transmission lines, substations and power plants, etc., and there is a lack of systematic research on lightning protection of distribution lines. In order to solve the influence of tree branches and other external objects on distribution lines and improve the reliability of power supply, most cities in my country are gradually replacing 10kV overhead lines with insulated wire distribution lines. Although the insulation transformation of medium-voltage overhead distribution lines has been carried out, the health level of distribution lines has been greatly improved compared with bare conductors, but at the same time new technical problems have emerged, one of which is insulation The problem of wi...
Claims
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IPC IPC(8): H01B17/46H01T4/10H01T1/15
Inventor 郭润生何彩红马晶晶马晓明杨文鹏苏文斌
Owner STATE GRID CORP OF CHINA
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