Pot-type insulator

Abstract

The invention relates to a pot-type insulator, which comprises an insulation pouring body which is of a pot shape, wherein the inner wall of a pot body of the insulation pouring body is smoothly connected with correspondent surfaces of a pot edge and a pot bottom respectively through a first arc surface section and a second arc surface section, which are tangential with each other, the junction part of the pot body and the pot edge of the insulation pouring body is embedded with a shield ring which is coaxial with the insulation pouring body and used for improving the distribution of an electric field on the edge surface of the insulator, and the shape of the shield ring is consistent with the shape of a pot opening of the insulation pouring body; and on the longitudinal cross section of an axis of the insulator, a contour line of the first arc surface section is of an arc section, the cross section of a ring body of the shield ring is of a circular shape or an elliptic shape, a symmetric axis of the cross section of the shield ring body is overlapped with an angular bisector of a central angle corresponding to the arc section, and the distance from the center of the cross section of the shield ring body to the top surface of the insulation pouring body is not smaller than the minimal insulation distance. Due to adopting the pot-type insulator, the distribution of the electric field of the edge surface of the insulator can be well improved, the flashover can be prevented, and the application requirement of a high-voltage insulator can be met.

Description

technical field [0001] The invention relates to the technical field of high-voltage switchgear, in particular to a basin-type insulator used in high-voltage switchgear. Background technique [0002] For high-voltage switchgear, its voltage level mainly depends on the various electrical and mechanical performance indicators of the insulator. The higher the voltage level, the higher the requirements for the insulator. For example, large pot insulators for 1100kV GIS products are required to have insulation performance at a voltage level of 1100 kV, which puts forward higher requirements for the electric field distribution along the surface of pot insulators. [0003] The Chinese patent with the document number CN 20153603.4 U discloses a new type of pot insulator, which includes a pot-shaped insulating cast body made of epoxy resin. The insulating cast body is composed of a pot edge, a pot body and a pot bottom. , wherein the basin body is conical, and the inner wall of the b...

AI Technical Summary

Problems solved by technology

The pot-type insulator with this structure is likely to cause flashover discharge due to the uneven distribution of the electric field along the surface during use. At present, the method of adding a voltage equalizing ring is usually used to improve the uneven distribution of the electric field, but the improvement effect is due to The size of the grading ring and the location of the installation are very different. This method of improving the electric field distribution along the surface of the insulator is not suitable for pot insulators with high voltage levels such as 1100 kV, and cannot meet the requirements of high voltage levels.

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