Piggable Pipeline Switch Arm With Pivotable Extension
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Solution Overview
Problem
Pigs used in pipeline maintenance face difficulties navigating sharp bends, necessitating Y-shaped junctions with gradual curves to maintain piggability, and existing switch arms do not easily adapt to various pipeline configurations, potentially causing the pig to get stuck.
Innovation Solution
A pivotable switch arm extension with a teardrop-shaped upper and lower plate, secured by a pin, allowing the switch arm to follow pipeline curves and prevent rotation beyond a certain orientation, ensuring smooth passage for pigs through pipeline connectors with various configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a switch arm is designed to follow pipeline curves, then piggability is maintained, but the manufacturing complexity increases
Solution Approach 1:
The switch arm is divided into multiple segments: a fixed portion attached to the pipeline wall and a movable extension portion that can pivot independently. This segmentation allows each part to be manufactured separately using standard machining processes, then assembled together, maintaining manufacturing ease while enabling the overall structure to follow pipeline curves for piggability
Solution Approach 2:
The switch arm extension is designed as a movable component that can pivot relative to the fixed portion, transforming the static structure into a dynamic one. This dynamic capability allows the switch arm to adapt to curved pipeline configurations, ensuring smooth pig passage while the individual components remain simple to manufacture
2Adaptability or versatility
If a pivotable switch arm extension is added, then adaptability to pipeline configurations improves, but device complexity increases
Solution Approach 1:
By separating the switch arm into a fixed portion and a movable extension portion connected by a pivot joint, the design achieves adaptability to different pipeline configurations through the movable segment while keeping each individual component relatively simple in structure
Solution Approach 2:
The pivot joint acts as an intermediary mechanism between the fixed switch arm portion and the movable extension. This simple rotational connection enables the extension to follow pipeline curves without requiring complex mechanisms, thus improving adaptability while minimizing the increase in overall device complexity
Data Source
AI summary
An extended switch arm for a piggable pipeline connector for directing a pig to a particular pipeline and a method of manufacturing the same. The extended switch arm may comprise a switch arm, an upper plate attached to the top of one end of the switch arm, and a lower plate attached to the bottom of the end of the switch arm and aligned with the upper plate. A switch arm extension may pivotally attach between the upper and lower plates via a pin, allowing the switch arm extension to pivot from side to side relative to the switch arm as the switch arm is moved from one side of the pipeline connector to the other, essentially blocking access by the pig to one pipeline or the other without providing any sharp angles or other surfaces upon which the pig could become caught.