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Wrist arm insulator for 25kv electrified railway catenary and manufacturing method thereof

A technology for electrified railways and catenary, applied in the field of wrist arm insulators, to achieve excellent mechanical and electrical properties, solve the pollution flashover of external insulation, and excellent mechanical and electrical properties.

Active Publication Date: 2016-08-10
JIANGSU SOUTH PORCELAIN INSULATOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the design and manufacture of 25kV wrist-arm porcelain composite insulator series products have not been reported. Therefore, it is necessary to research and invent 25kV wrist-arm porcelain composite insulator series products

Method used

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  • Wrist arm insulator for 25kv electrified railway catenary and manufacturing method thereof
  • Wrist arm insulator for 25kv electrified railway catenary and manufacturing method thereof
  • Wrist arm insulator for 25kv electrified railway catenary and manufacturing method thereof

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Embodiment Construction

[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0036] figure 1 It is a structural schematic diagram of an embodiment of the present invention.

[0037] Such as figure 1 Shown: A wrist-arm porcelain composite insulator for 25kV electrified railway catenary, including a high-alumina porcelain insulator body 4, an insulating shed sheath 3 and two fittings. In this embodiment, the fittings are double Clamp fittings 1 and grommet fittings 6, the insulating shed sheath 3 is set outside the high-alumina porcelain insulator body 4, and the two fittings are respectively set on the high-alumina porcelain insulator body 4 Both ends are glued and fixed with inorganic silicate glue through variable vibration process.

[0038] figure 2 It is a structural schematic diagram of the double-clamp fitting accessory of the present invention.

[0039] Such as figure 2 As shown: the glued part o...

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Abstract

The invention discloses a wrist-arm porcelain composite insulator for a 25kV electrified railway catenary. The rated operational voltage of the insulator is 25kV, the structural height is 750 to 900mm, the largest rated mechanical bending failure load is 20kN, the largest rated mechanical tensile failure load is 160kN, the power frequency dry / wet withstand voltage is 150 / 190kV, the peak value of lightning impulse withstand voltage is 310kV, the lowest arc distance is 490mm, the smallest thickness of an outer insulating umbrella skirt sheath is 3mm, the power frequency withstand voltage is larger than 36kV in the condition that salt density is 0.35mg / cm2 or dust density is 2mg / cm2, and the overall creep distance is larger than 1600mm. The invention also discloses the manufacture method of the wrist-arm porcelain composite insulator. The wrist-arm porcelain composite insulator effectively eradicates accidents of brittle failure and bunch dropping of composite insulators, solves the problem of pollution flashover of outer insulation of the porcelain insulator, and has the advantages that mechanical and electrical performances are excellent, and the wrist-arm porcelain composite insulator is applicable to various extremely severe work condition environments.

Description

technical field [0001] The invention relates to a wrist-arm insulator for a power frequency single-phase AC 25kV electrified railway catenary, in particular to a 25kV wrist-arm porcelain composite insulator with excellent mechanical and electrical properties. Background technique [0002] At present, the wrist insulators widely used in electrified railway catenary include porcelain rod insulators and wrist composite insulators. Porcelain rod insulators have good bending and torsion resistance, excellent mechanical properties, and wrist-arm composite insulators have high pollution flashover voltage and excellent electrical properties. made a great contribution. [0003] However, the surface of porcelain rod-shaped insulators in operation is easy to adhere to dirt, and external flashover may occur when the weather conditions are suitable. They are relatively heavy and relatively difficult to transport and install. The biggest criticisms are the long-term creep of the insulat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B17/32H01B17/42H01B19/04H01B19/00
Inventor 杨志峰王根水王士维周志勇刘少华张海兵
Owner JIANGSU SOUTH PORCELAIN INSULATOR CO LTD
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