Pillar insulator assembly and GIL system

Abstract

The present invention relates to a pillar insulator assembly and a GIL system. The insulator assembly comprises an insulator with at least two pillars; one end of each pillar adjacent to the barrel is provided with a metal insert; at least one pillar of the insulator is provided with a grounding structure; the grounding structure comprises a floating shell and a conductive member which is directively arranged on the floating shell; the pillar corresponding to the grounding structure is provided with a limiting structure for stopping and limiting the floating shell, so as to prevent the floating shell from contacting with the barrel; the conductive member is stopped in a radially outward direction by the floating shell; and the grounding structure further comprises a resilient force which is provided radially outward for the conductive member and is arranged between the metal insert and the conductive member to ensure the compression spring contacted between the conductive member and the barrel. According to the pillar insulator assembly provided by the present invention, the floating shell is limited in a radially outward direction by using the pressing plate, so that the contact between the floating shell and the barrel is avoided, the contact area between the pillar insulator assembly and the barrel is reduced, the slide resistance is reduced, and the assembly is easy to be installed.

Description

technical field [0001] The invention relates to a gas-insulated metal-enclosed power transmission system, in particular to a post insulator assembly and a GIL system. Background technique [0002] With the continuous development of high-voltage power transmission, GIL (Gas Insulated Metal Enclosed Transmission Line) has received great attention as a new form of high-voltage power transmission. A GIL system generally includes a cylinder, a conductor disposed in the cylinder, and a post insulator assembly disposed in the cylinder to support the conductor. Considering that the conductor will expand with heat and contract with cold when the ambient temperature changes, the post insulator assembly is generally movably installed in the whole body and can move axially in the cylinder. Considering the grounding requirements, the post insulator assembly generally includes a grounding structure that is in electrical contact with the barrel. [0003] For example, the Chinese inventio...

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Problems solved by technology

[0004] When this insulator assembly is in use, since the floating part of the ground block is also in contact with the cylinder, the friction force is relatively large when the post insulator and the cylinder move relatively, which not only easily causes scratches on the inside of the cylinder and the floating part of the ground block , prone to debris, and very inconvenient to install

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