Gas-Insulated Transmission Line Insulator Mounting Without Welding
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Solution Overview
Problem
Conventional methods for mounting and demounting insulators in gas-insulated transmission lines face issues such as welding spatters and mechanical wedge connections, which are time-consuming and costly, and can damage the connection structures during replacement or removal.
Innovation Solution
An insulation supporting assembly using a detachable connection structure with threaded fasteners, comprising an insulator with a central portion and supporting legs, and connecting plates mounted to the outer enclosure via threaded fasteners, allowing easy assembly and disassembly without welding or mechanical wedge connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If welding is used to mount the insulator to the outer enclosure and conductor, then the connection strength is improved, but welding spatters contaminate the insulator, conductor, and inner surface of the enclosure
Solution Approach 1:
The patent introduces connecting plates as intermediary components between the insulator and the outer enclosure/conductor. These connecting plates serve as mediators that provide mechanical attachment points without requiring direct welding to the insulator body, thus preventing welding spatter contamination while maintaining connection strength through bolted or screwed joints.
Solution Approach 2:
The patent segments the connection structure by introducing separate connecting plates that are attached to both the insulator and the outer enclosure/conductor. This segmentation allows the connection function to be separated from the insulator body, enabling non-welding attachment methods and preventing contamination of the insulator surface.
2Object-affected harmful factors
If mechanical wedge connection and necking process are used to mount the insulator, then welding spatter contamination is avoided, but the process is time-consuming and costly due to special jigs
Solution Approach 1:
The connecting plates are pre-formed with attachment features (holes for bolts or screws) that enable direct mounting of the insulator without requiring time-consuming on-site jig preparation. The preliminary preparation of connecting plates with standardized attachment features significantly reduces assembly time and eliminates the need for special jigs.
3Object-affected harmful factors
If mechanical wedge connection and necking process are used to mount the insulator, then welding spatter contamination is avoided, but the connection structures are damaged when replacing or removing the insulator
Solution Approach 1:
The connecting plates serve as sacrificial intermediaries that can be easily attached and detached from both the insulator and the outer enclosure/conductor. This intermediary structure protects the main connection structures (outer enclosure and conductor) from damage during insulator replacement, as the connecting plates bear the attachment loads and can be removed without affecting the integrity of the outer enclosure and conductor.
Data Source
AI summary
Embodiments of the present disclosure provide an insulation supporting assembly. The insulation supporting assembly includes an insulator and at least one connecting plate. The insulator includes a central portion and at least one supporting leg. The central portion includes a through hole extending along a central axis and adapted to receive an inner conductor of a gas-insulated transmission line. The supporting leg extends outwardly from the central portion in a radial direction normal to the central axis. Each of the connecting plates is arranged at an end of a respective supporting leg and includes at least one first hole for mounting the respective connecting plate to an outer enclosure of the gas-insulated transmission line by a first threaded fastener. Embodiments of the present disclosure provide a gas-insulated transmission line including the above-mentioned insulation supporting assembly as well.