Insulation Rod Connection in Vacuum Circuit Breakers
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Solution Overview
Problem
In switchgear, the use of insulation rods with multiple components and bolts increases weight and complexity, leading to reduced workability and mechanical strength.
Innovation Solution
The insulation rod features holes at each end for connection with rod pins, arranged 90 degrees out of phase to prevent falling, and is made of fiber-reinforced plastic (FRP) to reduce weight and enhance mechanical strength, eliminating the need for additional support components and fasteners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If insulation support tube and insulation support are used to prevent the insulation rod from falling, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent combines the insulation support tube and insulation support into a single integrated insulation support structure. This merged component performs both functions simultaneously, reducing the total number of parts while maintaining the reliability of preventing the insulation rod from falling during operation.
2Strength
If multiple support components and bolts are used to ensure mechanical strength, then strength is improved, but weight increases
Solution Approach 1:
The patent merges multiple support components into a single integrated insulation support structure, eliminating redundant parts and reducing overall weight while maintaining mechanical strength through optimized structural design.
Solution Approach 2:
The patent employs composite materials in the construction of the insulation support structure to achieve high mechanical strength with reduced weight, replacing traditional heavy materials with lighter composite alternatives that maintain structural integrity.
3Reliability
If multiple components and fasteners are used to connect the insulation rod, then reliability is improved, but ease of manufacture deteriorates
Solution Approach 1:
The patent integrates multiple separate support components into a single molded insulation support structure, eliminating the need for assembly with bolts and fasteners. This significantly improves ease of manufacture while maintaining connection reliability through the integrated design.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration simplifies assembly, reduces weight, and maintains mechanical strength by using FRP and phased rod pins to prevent the insulation rod from falling, thereby improving workability and reducing the overall component count.
Implementation Method 1
fiber reinforced plastic (FRP) resin is used as a material of the insulation rod to satisfy mechanical strength and to also achieve reduction in weight
Data Source
AI summary
A tank type vacuum circuit breaker uses a columnar or cylindrical insulation rod at a connection portion between an operating mechanism unit and a vacuum valve. The insulation rod is connected to the operating mechanism unit and the vacuum valve by rod-shaped pins. To prevent the insulation rod itself from falling, connection is made by shifting phases of the pins 90 degrees, respectively, each pin being connected to the operating mechanism unit and the vacuum valve. Accordingly, the falling of the insulation rod, the use of an insulation support tube and an insulation support for ensuring mechanical strength, are avoided. Further fastening of those supports by bolts or the like is not needed. Increases in the number of components, the size of the shape of assembly members around the insulation rod, and weight due to such increases, are prevented.