Vacuum Interrupter Pole Structure for Heat Dissipation and Switch Integration
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Solution Overview
Problem
Existing vacuum interrupter poles for circuit breakers suffer from poor heat dissipation performance, large size, high weight, environmental unfriendliness, and low integration level, particularly when integrating with three-position switches.
Innovation Solution
A vacuum interrupter pole design featuring a U-shaped insulation supporting shell with a honeycomb top wall, conductive connector, and environmental-friendly thermoplastic material, allowing for improved heat dissipation, reduced size, and enhanced integration with moving knife components and three-position switches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional thermosetting material (e.g., epoxy resin) is used to cover the vacuum interrupter pole, then insulation and structural integrity are achieved, but the device suffers from large size, heavy weight, poor heat dissipation performance, and environmental unfriendliness
Solution Approach 1:
The patent changes the material parameter from traditional thermosetting material (epoxy resin) to thermoplastic material. This parameter change achieves multiple improvements: thermoplastic materials have lower density (reducing weight), better thermal conductivity (improving heat dissipation), and are environmentally friendly while maintaining adequate insulation performance through proper material selection and design
Solution Approach 2:
The patent employs composite material structure by combining thermoplastic material with conductive filler particles or layers. This creates a composite material that simultaneously provides electrical insulation (from the thermoplastic matrix), thermal conduction (from the conductive fillers), and mechanical strength, resolving the contradiction between insulation requirements and heat dissipation needs
2Strength
If traditional thermosetting material is used for the vacuum interrupter pole, then structural integrity is maintained, but heat dissipation performance deteriorates
Solution Approach 1:
The patent uses composite materials combining thermoplastic matrix with conductive fillers (such as metal particles or carbon-based materials). The thermoplastic provides structural integrity and insulation, while the conductive fillers create thermal pathways for efficient heat dissipation, simultaneously achieving both structural strength and thermal management
Solution Approach 2:
The patent applies local quality enhancement by incorporating heat dissipation features such as heat sinks, fins, or increased surface area structures at specific locations where heat generation occurs (near the vacuum interrupter contacts). This localized approach improves heat dissipation performance without compromising overall structural integrity
3Adaptability or versatility
If the vacuum interrupter pole is integrated with moving knife component of isolation switch, then integration level improves, but device complexity increases
Solution Approach 1:
The patent designs the vacuum interrupter pole with multi-functionality: it serves as both the insulating support for the vacuum interrupter and as the mounting structure for the moving knife component of the isolation switch. The conductive connector integrated into the pole structure provides both electrical connection and mechanical support functions, reducing the need for separate components and simplifying the overall device structure
Solution Approach 2:
The patent merges previously separate components (vacuum interrupter pole, conductive connector, and moving knife mounting structure) into a single integrated structure. The conductive connector is combined with the insulating pole body, and both together provide support for the moving knife component, achieving high integration while maintaining structural simplicity through unified 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
The design achieves stable electrical connections, efficient heat dissipation, reduced size and weight, and improved integration with three-position switches, enhancing the overall performance and environmental friendliness of circuit breakers.
Implementation Method 1
the top wall has a honeycomb structure. It is to be easily appreciated that the honeycomb structure has a relatively high impact resistance strength which can withstand the impact generated during the breaking or closing of the vacuum interrupter
Implementation Method 2
a conductive connector with a first end and a second end, wherein the first end is fastened between the top wall and the vacuum interrupter and electrically connected to the vacuum interrupter
Data Source
Figure 1
Figure 2~3
Figure 4a
AI summary
The present disclosure provides a vacuum interrupter pole for a circuit breaker and its associated electrical device. The vacuum interrupter pole comprises: a vacuum interrupter; an insulation supporting shell for accommodating and supporting the vacuum interrupter and having a top wall and side walls defining a U shape, where the vacuum interrupter is adapted to be placed within an interior space limited by the side walls via an opening side of the U shape; and a conductive connector with a first end and a second end, wherein the first end is fastened between the top wall and the vacuum interrupter and electrically connected to the vacuum interrupter, and the second end is adapted to act as a supporting point for a moving knife component of an isolation switch that is electrically connected with the circuit breakers.