Segmented Pipe Coupling With Stop Surfaces for Gasket Protection
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Solution Overview
Problem
Existing segmented mechanical couplings for joining pipe elements face challenges in ease of assembly, providing a consistent and unambiguous visual indication of proper installation, and protecting and properly compressing the gasket, due to tolerance issues and potential overtightening.
Innovation Solution
The coupling comprises first and second segments with adjustable fasteners and stop surfaces, allowing for end-to-end connection and ensuring proper alignment and engagement of teeth and recesses, which provides a visual confirmation of proper installation and maintains gasket integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If segments are designed to be completely fastened to one another, then installation time is reduced, but tolerance ranges may cause gaps between segments leaving the gasket exposed
Solution Approach 1:
The coupling segments are pre-configured with protrusions and recesses that automatically engage when segments are brought together. This preliminary arrangement of mating features ensures proper alignment and gap elimination occurs automatically during assembly, eliminating the need for progressive fastener tightening while ensuring the gasket is properly positioned and protected from the start
Solution Approach 2:
The invention replaces the traditional mechanical fastening system with interlocking protrusion-recess features that provide automatic mechanical engagement. This substitution eliminates the need for multiple fasteners and progressive tightening operations, achieving complete fastening in a single action while ensuring consistent gap elimination through the geometric constraint of the interlocking features
2Ease of operation
If traditional fastening methods are used, then assembly is straightforward, but there is no clear visual indication of proper installation
Solution Approach 1:
The coupling segments incorporate visual indicators such as colored surfaces or markings on the protrusions and recesses that align or contact when proper assembly is achieved. These visual cues provide immediate, unambiguous confirmation that the coupling is correctly installed, transforming the assembly process from a task requiring verification to one with self-evident completion
3Ease of operation
If segments are allowed to move freely during assembly, then alignment is easier, but the gasket may bulge or become exposed due to tolerance gaps
Solution Approach 1:
The protrusions and recesses act as intermediary elements that mediate between the segments during assembly. These features guide the segments into proper alignment while maintaining consistent spacing that eliminates gaps, serving as a mechanical intermediary that ensures both ease of assembly and precise gap control simultaneously
Data Source
AI summary
A pipe coupling has two segments with lugs adapted to receive adjustable fasteners to draw the segments together to join pipe elements. Each lug has an inner surface and a stop surface in spaced relationship. The stop surfaces on corresponding lugs contact each other when the adjustable fasteners are tightened.