800kV outdoor rod-shaped post porcelain insulator

Abstract

The invention discloses an 800kV outdoor rod-shaped post porcelain insulator. The 800kV outdoor rod-shaped post porcelain insulator comprises two porcelain insulator bodies and four metal fasteners, wherein two of the metal fasteners are arranged at the two ends of one porcelain insulator body respectively, the other two metal fasteners are arranged at the two ends of the other porcelain insulator body respectively, and every two adjacent metal fasteners are fixedly connected. The 800kV outdoor rod-shaped post porcelain insulator is characterized in that the porcelain insulator bodies comprise rod-shaped porcelain rod bodies and even numbers of array porcelain umbrella bodies which are arranged on the peripheries of the rod-shaped porcelain rod bodies; the even numbers of array porcelain umbrella bodies comprise a plurality of large-diameter porcelain umbrella bodies, and meanwhile two small-diameter porcelain umbrella bodies are arranged between every two adjacent large-diameter porcelain umbrella bodies in a spaced mode. The 800kV outdoor rod-shaped post porcelain insulator has the advantages that the distances S between umbrellas can be longer by the adoption of the even numbers of array porcelain umbrella bodies, the probability of a flashover path formed in the way that bridging happens to rainwater between every two adjacent large-diameter porcelain umbrella bodies is lowered, the structural mode that two elements are combined into an 800 kV outdoor rod-shaped post porcelain insulator is adopted, a larger insulation margin is obtained, and thus the 800kV outdoor rod-shaped post porcelain insulator achieves a more reliable external insulation and high-voltage resistance level under an abnormal state rain wetting environment or a humid environment.

Description

technical field [0001] The invention relates to an 800kV outdoor rod-shaped post porcelain insulator, which is mainly used in electrical equipment such as busbars or isolating switches of power stations above 800kV high voltage. Background technique [0002] Porcelain pillar rod insulators are necessary parts for the insulation support of electrical equipment conductors such as power station busbars or disconnectors above 800kV high voltage. The umbrella shape of the international standard type porcelain insulator products is a singular array of large and small umbrellas or equal diameter umbrellas, which are generally suitable for normal or Standard reference range environment. At the same time, the existing 800kV outdoor rod-shaped post porcelain insulators are generally composed of three or four elements. However, due to the limitation of the umbrella shape and size of the standard porcelain insulator and the loss of insulation distance caused by the multi-element combina...

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Problems solved by technology

At the same time, the existing 800kV outdoor rod-shaped post porcelain insulators are generally composed of three or four elements. However, due to the limitation of the umbrella shape and size of the standard porcelain insulator and the loss of insulation distance caused by the multi-element combination metal connectors, the insulator is resistant to humidity. The flashover or wet impulse voltage has a limited ability to raise the voltage level, and it is very easy to trip in the ultra-conventional high-humidity environment and heavy rainfall environment, such as when the horizontal and vertical rainfall is greater than 5mm

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