A kind of lightning shock resistant composite insulator

A composite insulator, lightning impact technology, applied in insulators, suspension/strain insulators, circuits, etc., can solve the problems of catenary equipment damage, insulator flashover, breakdown, etc., to improve the level of lightning resistance, increase and service life, reduce The effect of the strength of the lightning impulse voltage

Active Publication Date: 2018-07-03
KAIDA TIEJIAN ELECTRIFIED RAILWAY EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This very high overvoltage will cause flashover or breakdown of insulators and cause accidents, causing harm to catenary equipment

Method used

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  • A kind of lightning shock resistant composite insulator
  • A kind of lightning shock resistant composite insulator
  • A kind of lightning shock resistant composite insulator

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0048] A lightning impact resistant composite insulator of the present invention comprises a mandrel 1, a first sheath 2, an umbrella shed 3, a voltage equalizing shielding ring 4, a high voltage end fitting 51, a grounding end fitting 52, a first stress cone 6 and a second sheath Set of 8. The first sheath 2 is located on the outer side of the mandrel 1; the shed 3 is arranged on the first sheath 2; the first stress cone 6 is provided with two groups, and each group is composed of two first stress cones 6 with the bottom of the cone bonded together. They are respectively arranged at both ends of the mandrel, the first stress cone is the external insulation stress cone; the voltage equalizing shield ring 4 is located between the stress cone 6 and the high voltage end fitting 51 and / or the grounding end fitting 52; the second sheath 8 is HTV silicone The sheath is arranged on the outside of the hardware.

specific Embodiment 2

[0049] The present invention is a double-insulated lightning impact resistant composite insulator, comprising a mandrel 1, a first sheath 2, an umbrella skirt 3, a voltage equalizing shielding ring 4, a high-voltage end fitting 51, a grounding end fitting 52, a first stress cone 6 and a second stress cone. Second sheath 8. The first sheath 2 is located on the outer side of the mandrel 1; the shed 3 is arranged on the first sheath 2; the first stress cone 6 is provided with two groups, and each group is composed of two first stress cones 6 with the bottom of the cone bonded together. The first stress cone is the external insulation stress cone; the equalizing shielding ring 4 is located between the stress cone 6 and the high-voltage end fitting 51 and / or the grounding end fitting 52; the jumper clamp 7 is set on the On the bolt between the high-voltage end fitting 5 and the mandrel 1; the second sheath 8 is an HTV silicone sheath, which is located outside the fitting.

specific Embodiment 3

[0050] A lightning impact resistant composite insulator of the present invention comprises a mandrel 1, a first sheath 2, an umbrella skirt 3, a voltage equalizing shielding ring 4, a high voltage end fitting 51, a grounding end fitting 52, a first stress cone 6, a second stress Cone 61 and the second sheath 8. The first sheath 2 is located on the outer side of the mandrel 1; the shed 3 is arranged on the first sheath 2; the first stress cone 6 is provided with two groups, and each group is composed of two first stress cones 6 with the bottom of the cone bonded together. They are respectively arranged at both ends of the mandrel. There is at least one set of second stress cones 61. The second stress cones 61 are arranged on the mandrel. Each group is composed of two second stress cones with the bottoms of the cones attached together. The first Both the stress cone 6 and the second stress cone 61 are external insulation stress cones; the equalizing shielding ring 4 is located b...

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PUM

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Abstract

A lightning impact resistant composite insulator of the present invention comprises a mandrel, a first sheath, an umbrella shed provided on the sheath, a high-voltage end fitting and a grounding end fitting, and is characterized in that it also includes at least one first stress cone or second stress cone A stress cone group, the first stress cone or the first stress cone group is arranged at the connection between the high-voltage end fittings and / or the grounding end fittings and the mandrel, and the first stress cone group is composed of two cone bottoms bonded by the second A stress cone is combined, and the first stress cone is an external insulation stress cone. The invention has the following beneficial effects: effectively protecting the structural safety of the end fittings, improving the lightning resistance level and service life of the insulator; reducing the intensity of the lightning impulse voltage received by the end fittings; ensuring that the temperature rise of the insulator does not exceed the ambient temperature 20K, which improves the flashover voltage and corona inception voltage of the insulator; the structure is simple and reasonable, and the installation is convenient.

Description

technical field [0001] The invention relates to a lightning impact resistant composite insulator, which belongs to the technical field of insulation equipment structure. Background technique [0002] The rated voltage of the electrified railway catenary is 25kV, and the maximum operating voltage of the system is 27.5kV. When lightning occurs near the catenary, the catenary will have an atmospheric overvoltage exceeding 27.5kV. This very high overvoltage will cause flashover or breakdown of insulators and cause accidents, which will cause harm to catenary equipment. Atmospheric overvoltage can be divided into induced lightning overvoltage and direct lightning overvoltage. The induced lightning overvoltage is caused by the violent change of the electromagnetic field and electromagnetic coupling, while the direct lightning overvoltage is caused by the large lightning current flowing through the struck object. The induced lightning overvoltage generally does not exceed 500kV,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B17/42H01B17/02
Inventor 乔培凯翟胜利
Owner KAIDA TIEJIAN ELECTRIFIED RAILWAY EQUIP CO LTD
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