High-voltage gas immersed termination mounting and positioning structure

Abstract

The invention discloses a high-voltage gas immersed termination mounting and positioning structure. A pluggable high-voltage gas immersed termination (GIS) comprises a high-voltage cable, an epoxy sleeve, an inner insulator and a plugging and unplugging mechanism. The structure is characterized in that: three groups of sliding pins and springs are radially uniformly distributed on the end part of a moving contact in the plugging and unplugging mechanism; three sliding chutes are axially formed on the inner hole sidewall of an upper electrode of the epoxy sleeve; the roots of the three sliding chutes are radially provided with a positioning groove respectively; and the three groups of sliding pins and springs of the end part of the moving contact are assembled, disassembled, moved and positioned by the three corresponding sliding chutes and the corresponding positioning grooves. The structure realizes the function of plugging and unplugging the cable relative to the epoxy sleeve, improves the positioning accuracy of the cable, simplifies a mounting process and improves the construction efficiency.

Description

technical field [0001] The invention relates to an installation structure of a gas insulated terminal (GIS terminal), in particular discloses an installation and positioning structure of a high-voltage gas insulated terminal, which is suitable for the installation and positioning of 110kV and above GIS terminals. Background technique [0002] Gas-insulated termination (GIS terminal for short) is a cable terminal installed in the gas-insulated part of the gas-insulated enclosed switchgear (GIS) with sulfur hexafluoride (SF6) gas as the outer insulation. High-voltage GIS terminals are mainly composed of high-voltage cables, epoxy bushings, and internal insulation structures. According to the installation method, they are mainly divided into ordinary GIS terminals and plug-in GIS terminals. [0003] Ordinary GIS terminals can only be installed after the entire terminal is installed, and then inserted into the GIS cylinder as a whole for sealed installation. [0004] The plug-i...

AI Technical Summary

Problems solved by technology

However, the mechanical fixation of the cable and the epoxy sleeve has not yet been achieved, and the axial fixation can only be achieved by the cable hoop at the end of the terminal (see figure 1 )

This kind of fixing is not reliable. Once the axial displacement occurs inside the cable, the position of the inner insulation of the terminal will inevitably change, and the performance of the terminal cannot be guaranteed.

The cable positioning of this structure is determined by the length L of the exposed part after the control cable is inserted into the epoxy sleeve. The cable positioning is not accurate enough, and the installation process and fixing method are also relatively cumbersome.

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