Tower-shaped composite sleeve of ultrahigh-voltage cable terminal

Abstract

The invention discloses a tower-shaped composite sleeve of an ultrahigh-voltage cable terminal. The tower-shaped composite sleeve comprises a sleeve main body and is characterized in that the sleeve main body employs a three-segment tower-shaped structure, wherein a lower segment is a first cylinder, an intermediate segment is a cone, an upper segment is a second cylinder, an upper-part fitting and a lower-part fitting are respectively arranged at an upper part and a lower part of the sleeve main body, an umbrella skirt is arranged on an outer surface of the sleeve main body, anti-icing umbrellas are arranged at an intersection part of the intermediate segment and the upper segment and an intersection part of the intermediate segment and the lower segment, and the diameters of the anti-icing umbrellas are larger than the diameter of an umbrella in adjacent umbrella skirt. The tower-shaped composite sleeve has the advantages that 1) the dosage of insulation oil is reduced, and the epoxysleeve material is saved; 2) the equipment stability is improved; 3) the production process difficulty is reduced; 4) rainwater continuity can be effectively prevented, and icing flashover is prevented; 5) the protection effects of self cleaning, dirt prevention, water resistance, oil resistance and the like can be achieved; 6) the appearance has aesthetic appreciation; and 7) the tower-shaped composite sleeve is applicable to voltage classes being 330-550KV very well.

Description

technical field [0001] The invention relates to a tower-type composite bushing for an ultra-high voltage cable terminal. Background technique [0002] At present, the composite bushings of ultra-high voltage cable terminals are mainly cylindrical structures, and most of them are produced by using the existing mold structures of other high-voltage electrical equipment such as current transformers and capacitors. Features Design its unique structure. A small number of medium and high voltage cable terminals currently have a traditional two-stage tower structure. In the field of ultra-high voltage cable terminal composite bushings, as the voltage increases, the dry arc distance and creepage distance of the bushing need to be increased, and continue to be used. For the two-stage tower structure, the upper part of the truncated cone mold needs to be further increased, which has higher requirements for mold production technology and umbrella skirt production. And their shortcomi...

AI Technical Summary

Problems solved by technology

Moreover, their shortcomings are obvious. In the prior art, the amount of insulating oil in the composite bushing is relatively large, the center is not stable enough, and problems such as icing cannot be solved.

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