Vacuum Bottle Housing Mold for Polymer-Encapsulated Insulators
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Solution Overview
Problem
Existing vacuum disconnect switches in electrical power distribution networks face issues with the fragility of porcelain ceramic materials and the environmental impact of SF-6 gas, necessitating improvements in vacuum break switches.
Innovation Solution
The development of underarm overhead powerline vacuum break switches featuring a stationary post insulator and rotating spindle insulator, which connect to a phase base cross bar, and include a vacuum switch and disconnect blade, ensuring electrical continuity or discontinuity through a powerline pathway without bypassing, and are housed in a rigid cylinder encapsulated by an ice and water shield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If porcelain ceramic is used for vacuum bottle housing, then electrical insulation is improved, but material strength and fragility are worsened
Solution Approach 1:
The patent applies composite materials by combining porcelain ceramic with a polymer housing material. The polymer housing encapsulates the porcelain ceramic vacuum bottle, creating a composite structure that leverages the electrical insulation properties of porcelain while adding the impact resistance and flexibility of polymer materials. This resolves the contradiction by maintaining the electrical insulation function while eliminating the fragility issue.
2Reliability
If SF-6 gas is used for insulation, then electrical performance is improved, but environmental harm is worsened
Solution Approach 1:
The patent applies parameter changes by transitioning from SF-6 gas insulation to solid polymer material insulation. This changes the insulating medium from a gaseous compound with high environmental harm to a solid polymer material that is environmentally friendly. The polymer housing material provides the necessary electrical insulation properties without the harmful environmental effects of SF-6 gas, thus resolving the contradiction between electrical performance and environmental harm.
3Ease of operation
If vacuum switch is positioned above mounting arm, then electrical operation is simplified, but wildlife safety is worsened
Solution Approach 1:
The patent applies inversion by repositioning the vacuum switch from above the mounting arm to below it. This inverts the traditional arrangement, placing the electrified portion in a location less accessible to wildlife. The vacuum switch and disconnect blade are positioned below the mounting arm, maintaining electrical operational simplicity while significantly improving wildlife safety by keeping high-voltage components away from animal contact zones.
Data Source
AI summary
Aspects of the disclosure relates to tooling for molding a polymer housing for a vacuum bottle. The tooling comprises first and second mold halves, each defining one-half of a negative impression of the housing. The housing includes a cylindrical core with multiple spaced annular sheds extending outward, arranged as alternating large- and small-diameter sheds. The polymer housing encapsulates at least 70% of a rigid cylinder having two flanges separated by a narrower central body. Each mold cavity includes cylindrical end cavities with diameters larger than a central core cavity diameter, corresponding to the housing's core geometry. This arrangement enables accurate formation of the alternating shed structure, precise encapsulation of the rigid cylinder, and reliable dimensional control at the core and ends, facilitating robust vacuum bottle construction.