Insulating Support for Power Switchgear with Segmented Resin Core and Pleated Rubber Cover
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Solution Overview
Problem
The existing insulating supports for power switchgear are complex to produce due to their integrated mold structure, leading to issues like shrinkage, voids, and high labor costs, while requiring significant mechanical strength to support heavy conduction parts.
Innovation Solution
An insulating support design featuring a solid resin core with a cylindrical or truncated cone shape, a separate rubber exterior covering with pleated parts, and metal fittings at both ends, allowing for easier production and improved mechanical strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If insulating supports are molded as one part with core part and pleated part from epoxy resin, then mechanical strength is improved, but manufacturing complexity increases and production cost rises
Solution Approach 1:
The insulating support is divided into separate components: a core part and an exterior covering part with pleated parts. These components are manufactured separately and then assembled together, avoiding the need for complex integrated molding while maintaining structural integrity and mechanical strength.
2Strength
If insulating supports are molded as one part with core part and pleated part, then mechanical strength is improved, but production time and labor cost increase
Solution Approach 1:
By segmenting the insulating support into separately manufacturable components, each part can be produced using simpler, faster molding processes without the need for complex integrated molds, thereby reducing production time and labor costs while maintaining assembly integrity.
3Strength
If integrated mold structure is used for insulating support, then mechanical strength is improved, but molding defects such as shrinkage and voids increase
Solution Approach 1:
Dividing the insulating support into separate core and exterior covering parts allows each component to be molded using simpler mold structures, reducing the occurrence of molding defects such as shrinkage and voids that are common in complex integrated molding processes.
4Reliability
If pleated parts are processed after molding, then insulating properties are improved, but labor cost and production time increase
Solution Approach 1:
The pleated parts are pre-formed as integral components of the exterior covering part before assembly with the core part. This preliminary formation of the pleated structure eliminates the need for post-molding processing, reducing labor costs and production time while maintaining the required insulating properties and creepage distance.
Data Source
AI summary
The present invention relates to an insulating support for a power switchgear that insulates and supports the main body of a power switchgear provided in atmospheric air between a generator and a main transformer. The insulating support includes a core part that is molded only from a resin material and has a cylindrical shape; an exterior covering part that is molded only from a rubber material, is attached to an outer peripheral face of the core part, and includes a plurality of pleated parts; an end metal fitting that is attached to one end of the core part and is attached to the main body of the power switchgear; and an end metal fitting that is attached to the other end of the core part and is provided on the ground surface.