Curved Switchgear Tank Structure for Thin-Wall Pressure Resistance
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Solution Overview
Problem
Conventional gas insulated switchgear designs with flat walls require thick metal sheets to withstand internal pressure, leading to increased material consumption, weight, and cost, while high voltage designs with complex cast aluminum bodies are expensive to produce.
Innovation Solution
A switchgear tank design featuring cylindrical walls formed from bent metal sheets with partly spherical or ovoid end caps and flanges, allowing for thinner walls and reduced material usage while maintaining mechanical integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If flat wall design is used for pressurized tank, then assembly of internal parts is easy, but wall thickness must be increased to withstand internal pressure
Solution Approach 1:
The patent applies curvature by transitioning from flat walls to cylindrical walls for the tank body and flat ends to curved spherical ends. This curvature allows the structure to better withstand internal pressure with thinner walls, reducing material consumption while maintaining structural integrity under pressurized conditions
2Strength
If thick metal sheets are used for flat walls, then mechanical strength is sufficient, but weight and cost increase
Solution Approach 1:
The cylindrical walls and spherical ends distribute stress more effectively under internal pressure, allowing the use of thinner metal sheets that reduce both weight and cost while maintaining sufficient mechanical strength to withstand the pressurized insulation medium
3Strength
If cast aluminium body is used for high voltage applications, then pressure capability is optimized, but production complexity and cost increase
Solution Approach 1:
The patent achieves pressure capability optimization through curved geometry (cylindrical walls and spherical ends) rather than complex cast structures. This approach maintains sufficient strength for high voltage applications while using simpler, more cost-effective manufacturing processes involving curved sheet metal construction
Data Source
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AI summary
The present invention relates to a switchgear tank (1), comprising: - one or more centre body parts (2); - a first end cap (3); and - a second end cap (4); wherein the one or more centre body parts are formed from one or more bent metal sheets; wherein the first end cap is connected to at least one centre body part of the one or more centre body parts at a first axial position; wherein the second end cap is connected to at least one centre body part of the one or more centre body parts at a second axial position; and wherein each of the one or more centre body parts comprises at least partly cylindrical shape.