Pipe Coupling Visual Indicators for Tolerance-Tolerant Assembly
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Solution Overview
Problem
Existing segmented mechanical couplings face challenges in ease of assembly and lack consistent visual indication of proper installation due to varying pipe element tolerances, leading to gaps and complex rotation of segments.
Innovation Solution
A coupling design with adjustable fasteners and action/support surfaces that align transversely to the fastener axis, allowing for visual confirmation of proper installation through engagement of support surfaces, regardless of pipe tolerance ranges, and preventing over-rotation with stop surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If segmented mechanical couplings rely on contact between the coupling and pipe elements to create a rigid joint, then the coupling can accommodate varying pipe tolerances, but the assembly process becomes complicated and visual indication of proper installation is inconsistent
Solution Approach 1:
The coupling segments are designed with self-aligning features including tapered surfaces that automatically guide the segments into proper alignment during assembly, and visual indicators that self-evaluate installation correctness without requiring external inspection tools or complex procedures
Solution Approach 2:
The patent incorporates visual indicators such as colored surfaces or markings on the coupling segments that change appearance or position based on installation status, providing immediate visual confirmation of proper assembly and eliminating ambiguity about installation correctness
2Strength
If forceful radial contact is used between pipe elements and coupling surfaces, then a rigid joint is achieved, but varying gaps between connection members complicate assembly and prevent reliable visual indication
Solution Approach 1:
The coupling is divided into multiple segments with independent adjustment capabilities, where each segment can be individually positioned and secured. This segmentation allows the visual indicators on each segment to independently confirm proper installation, making detection straightforward even under forceful contact conditions
Solution Approach 2:
The patent introduces intermediary visual indicator elements that mediate between the forceful contact mechanism and the observer. These indicators translate the complex mechanical contact state into simple, unambiguous visual signals that are easy to detect and interpret
3Stability of the object's composition
If coupling segments are designed with complex interfaces to prevent rotation, then a rigid joint is formed, but additional cost and complexity are introduced
Solution Approach 1:
The coupling segments incorporate asymmetric features such as non-circular engagement surfaces or keyed interfaces that naturally prevent rotation without requiring complex additional components. The asymmetric geometry itself provides the anti-rotation function, simplifying the overall design
Solution Approach 2:
The coupling segments are pre-configured with alignment features and pre-loaded spring mechanisms that automatically engage and prevent rotation as soon as the segments are assembled. This preliminary action eliminates the need for complex post-assembly adjustments or additional anti-rotation components
Data Source
AI summary
A pipe coupling has two segments with action surfaces in facing relationship. Attachment elements on each segment, in the form of lugs, accommodate adjustable fasteners which draw the segments together when tightened. Support surfaces on the lugs engage one another to visually indicate that a proper installation of the coupling has been achieved.