A shielding case and a voltage transformer using the shielding case

Abstract

The invention relates to a shielding case and a voltage transformer using the same. The shielding cover comprises two arc-shaped pieces which are oppositely combined into a ring shape and used for being fixed to an outer side of a primary winding of the voltage transformer in an embracing mode, an opening is formed in the radial outer side of each arc-shaped piece, connecting blocks are fixed to the positions, at the bottoms of the openings, of two ends of the arc-shaped pieces respectively, an insulating plate is arranged at one folding position between the two arc-shaped pieces and is fixedly connected with the two arc-shaped pieces through a metal bolt, the size of the opening meets the requirement for operating the metal bolt, and the metal bolt is immersed into the opening. At the folding position, a through hole matched with the metal bolt is formed on one connecting block of the two arc-shaped pieces, a threaded hole matched with the metal bolt is formed on the other connectingblock, an insulating part is arranged between the connecting block provided with the through hole and the metal bolt, the metal bolt serves as a main stress component, so connecting stability of insulating connecting ends of the two arc-shaped pieces is guaranteed.

Description

technical field [0001] The invention relates to a shielding case, and also relates to a voltage transformer using the shielding case. Background technique [0002] The primary winding of sulfur hexafluoride gas-insulated voltage transformer products needs to be equipped with a high-voltage shielding cover to shield the high-voltage electric field. At the same time, the starting end of the primary winding lead wire needs to be conductively connected to the center conductor of the pot insulator through the high-voltage shielding cover. And connected to the primary end of the line through the center conductor. [0003] In order to meet the structural requirements of voltage transformers and improve assembly efficiency, a utility model patent with the authorized announcement number of CN201601013U and the authorized announcement date of 2010.10.06 discloses a shielding cover, which is composed of two circular arcs that form a ring structure It is composed of two arc-shaped tubu...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a shielding case to solve the problem that the insulating connection ends of the two arc-shaped tubes of the shielding case cannot be stably connected; the purpose of the present invention is also to provide a voltage transformer using the shielding case to Realize the stable fixing of the shielding cover on the outer side of the primary winding of the voltage transformer, thereby improving the performance of the voltage transformer

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