Insulating Fitting Couplings for Gas Insulated Switchgear Assembly
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Solution Overview
Problem
The assembly of gas insulated switchgear is complicated by the need for multiple insulating parts and components in a small, sealed compartment, making it difficult to transfer drive forces to switch blades while maintaining insulation, leading to increased component count and assembly steps.
Innovation Solution
The use of phase-to-phase connection mechanisms made of insulating materials, featuring fitting couplings composed of large- and small-diameter endless frame bodies, which support and connect switch blades for three-position switching without requiring pins or bolts, allowing for easier assembly and reduced component count.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple insulating parts and fasteners are used to transfer drive force between phases, then insulation reliability is improved, but device complexity and assembly difficulty increase
Solution Approach 1:
The patent combines multiple functions (insulation, drive force transfer, and mechanical connection) into a single integrated insulating mechanism. The insulating mechanism includes insulating blades that directly transfer drive force from one phase to another while providing electrical insulation, eliminating the need for separate insulating parts and fasteners. This merging of functions reduces assembly complexity while maintaining insulation reliability.
Solution Approach 2:
The insulating mechanism serves multiple purposes simultaneously: it acts as an insulator between phases, a mechanical connector for drive force transfer, and a structural support element. The insulating blades are designed to perform both electrical insulation and mechanical drive force transmission, making the component universal and reducing the overall number of parts needed in the system.
2Volume of moving object
If a compact switch tank design is implemented with coaxial blade arrangement, then device size is reduced, but assembly difficulty and component count increase
Solution Approach 1:
The patent merges the support structure and connection mechanism into the insulating mechanism itself. The insulating blades provide both structural support for the coaxial arrangement and the means for drive force transfer, eliminating the need for separate support brackets, pins, and fasteners that would be required in traditional designs.
Solution Approach 2:
The switch is divided into modular phase units, each with its own insulating mechanism that can be independently assembled. The insulating blades are segmented to allow individual phase assembly while maintaining the compact coaxial configuration, reducing the need for complex integrated support structures.
3Reliability
If traditional fasteners and insulating parts are used in sealed compartment, then insulation performance is maintained, but assembly time and manufacturing cost increase
Solution Approach 1:
The insulating mechanism integrates insulation and mechanical connection functions into a single component system. The insulating blades provide both electrical insulation and drive force transfer without requiring separate fasteners, reducing the number of assembly steps and improving productivity while maintaining insulation performance.
Solution Approach 2:
The patent extracts and eliminates unnecessary fasteners and separate insulating parts from the assembly. By designing the insulating mechanism to inherently provide both insulation and mechanical connection, the design removes redundant components that would otherwise be required to achieve the same functions.
Data Source
AI summary
A switch includes: switch blades for multiple phases which perform three-position switching among ON, OFF, and ground, using a rotation shaft; and phase-to-phase connection mechanisms which support the switch blades for the phases so as to be insulated among the phases and against the ground, and which connect the switch blades for the phases and cause them to cooperate with each other. The phase-to-phase connection mechanisms include fitting couplings made of an insulating material and each composed of a large-diameter endless frame body and a small-diameter endless frame body which are fitted to each other. The fitting couplings are arranged on the same axial line.