Super pollution-resistant rod-shaped epoxy glass fiber core porcelain insulators for electrified railway catenary

Abstract

The invention discloses a pollution-resistant rod-shaped epoxy glass fiber core porcelain insulator for electrified railway catenaries. The pollution-resistant rod-shaped epoxy glass fiber core porcelain insulator for electrified railway catenaries comprises an insulator body, an upper metal cap and a lower metal cap, wherein the insulator body comprises an insulator body core, an insulator body jacket and at least one silicone rubber umbrella cover; the insulator body jacket is made of a porcelain material; the insulator body core is arranged in the insulator body jacket; the insulator body core and the insulator body jacket are connected through insulating paste to form the solid insulator body; and the silicone rubber umbrella cover covers the contact place of the upper metal cap and the insulator body jacket and / or the contact place of the lower metal cap and the insulator body jacket through a chilling shrinking manner. Therefore, the pollution-resistant rod-shaped epoxy glass fiber core porcelain insulator for electrified railway catenaries has the advantages of strong in self-cleaning ability and better in pollution flashover resisting effect.

Description

Technical field [0001] The invention relates to a rod-shaped epoxy glass fiber core porcelain insulator for the contact net of an electrified railway with super pollution resistance. Background technique [0002] At present, the line tripping faults caused by the flashover of rod-shaped porcelain insulators are becoming more frequent in electrified railway catenary. Operating experience has proved that the flashover phenomenon of rod-shaped porcelain insulators is mainly pollution flashover, especially in harsh environments such as rain, fog, and thunderstorm. Occurred, causing a large-scale blackout of the catenary, and the impact was extremely serious. During long-term operation, the insulating surface will form a dirt layer under atmospheric pollution. When under drizzle, heavy fog, condensation and other meteorological conditions, the electrolyte components in the dirt layer will fully dissolve in the water and form a conductive path on the surface of the insulator. The insu...

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Problems solved by technology

[0003] However, the above two methods have the following problems: in the first method, since the method of bonding the shed is used to increase the creepage distance, the bonding part is susceptible to thermal expansion and contraction due to the influence of temperature, which makes it easy to Cracks at the bonding place will lead to fouling at the cracking place, which will cause uneven electric field and pose a safety hazard; in the second method, according to relevant standards, the thickness of brushing anti-fouling flashover material is 0.3-0.5mm. It is all manual on-site brushing, so it is difficult to ensure the uniformity of the coating thickness, which will easily lead to poor anti-fouling flashover effect. In addition, on-site brushing is more troublesome and consumes a lot of manpower

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