Power Switchgear Vacuum Valve Horizontal Insertion
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Solution Overview
Problem
Conventional power switchgear with tank type vacuum circuit breakers face difficulties in the installation, connection, and replacement of vacuum valves due to complex support structures, making them difficult to assemble and maintain.
Innovation Solution
A power switchgear design featuring a ground tank with pass-through holes in the fixed side contact case and cantilevered support structures for the vacuum valve, allowing horizontal insertion and retention, which simplifies the assembly and replacement process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the vacuum valve is supported by multiple insulators and contact cases in a conventional configuration, then the structural stability is improved, but the device complexity and difficulty of installation/replacement increase
Solution Approach 1:
The support structure is divided into separate functional components: a first insulator for electrical insulation, a first contact case for movable contact support, and a second contact case for fixed contact support. Each component performs a specific function independently, reducing overall structural complexity while maintaining stability.
Solution Approach 2:
The first contact case acts as an intermediary component between the first insulator and the movable contact, providing a dedicated support structure. Similarly, the second contact case mediates between the second insulator and the fixed contact, simplifying the overall support architecture.
2Reliability
If the vacuum valve is surrounded and fixed by multiple contact cases and insulators, then the reliability of connection is improved, but the ease of operation for installation and replacement deteriorates
Solution Approach 1:
The connection structure is segmented into distinct modular components (first insulator, first contact case, second contact case, second insulator) that can be independently assembled and disassembled. This modularity maintains reliable electrical connections while enabling easier installation and replacement operations.
Solution Approach 2:
The support structure is designed to be dynamically adjustable during installation, allowing the vacuum valve to be positioned and connected through a sequence of simple operations rather than requiring complex simultaneous adjustments.
3Manufacturing precision
If the vacuum valve is horizontally supported through multiple components, then the manufacturing precision of connections is improved, but the ease of repair and replacement deteriorates
Solution Approach 1:
The horizontal support structure is divided into separate precision-manufactured components (contact cases and insulators) that can be individually fabricated to high tolerances. This segmentation maintains manufacturing precision while enabling easier replacement of individual components without affecting the entire assembly.
Solution Approach 2:
The modular contact case and insulator design allows individual components to be discarded or replaced independently when worn or damaged, while the remaining precision components remain in place, facilitating efficient repair operations.
Data Source
AI summary
A power switchgear according to the present invention includes a pass-through hole which is formed in a fixed side contact case that is supported by a fixed side insulation supporter to fix and retain the fixed side of a vacuum valve and has a larger inner diameter than an outer diameter of the vacuum valve so that the vacuum valve is capable of horizontally passing through and the fixed side end portion of the vacuum valve is placed by passing through; and a fixed side connection conductor attached to the fixed side contact case and connected to the fixed side end portion of the vacuum valve.