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Composite insulator resistant to lightning strike

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

Active Publication Date: 2015-12-16
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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  • Composite insulator resistant to lightning strike
  • Composite insulator resistant to lightning strike
  • Composite insulator resistant to lightning strike

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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Abstract

The invention relates to a composite insulator resistant to lightning strike. The composite insulator comprises a core rod, a first sheath, an umbrella skirt arranged on the sheath, a high voltage end armor clamp and a grounding end armor clamp. The composite insulator is characterized by also comprising at least one first stress cone (group), the first stress cone (group) is arranged at the position(s) where the high voltage end armor clamp and / or the grounding end armor clamp and / is connected with the core rod, the first stress cone group is composed of two first stress cones whose bottoms are fit, and the first stress cone is an externally insulated stress cone. The composite insulator has the advantages that the structural safety of the armor clamps in the end portions is effectively protected, the lightning-resistant level of the insulator is improved, and the service life of the insulator is prolonged; the force, of lightning strike voltage, borne by the armor clamps in the end portions is reduced, it is ensured that temperature rise of the insulator is no 20K more than the ambient temperature; and the flashover voltage and the corona voltage of the insulator are improved; and the structure is simple and reasonable, and 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 Applications(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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