Non-Circular Corrugated Pipe Profile for Cooling Distortion Resistance
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Solution Overview
Problem
Non-circular corrugated plastic pipes with significant straight wall sections tend to distort inwardly during cooling due to gravitational forces and shrinkage, leading to reduced performance and manufacturing challenges.
Innovation Solution
The pipe features a series of corrugations with elongate wall segments forming at least 20% of the circumference, increasing in height towards the center to form a truss-like structure that opposes inward deflection, maintaining the pipe's structural integrity and preventing distortion during cooling and use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional corrugated pipe design with straight wall segments is used, then manufacturing is simpler and production speed is maintained, but the pipe distorts inwardly during cooling due to gravitational forces and shrinkage
Solution Approach 1:
The corrugation height is varied locally along the elongate wall segments, with central corrugations being taller than those at the ends. This local variation in corrugation height creates a truss-like structure that provides targeted reinforcement where needed to counteract gravitational forces and shrinkage during cooling, while maintaining overall structural integrity and production efficiency
Solution Approach 2:
The variable height corrugations create a curved, truss-like structural pattern along the straight wall segments. This curved configuration provides structural reinforcement that resists inward distortion during cooling, transforming the straight wall into a more resilient form that maintains shape accuracy without compromising production speed
2Adaptability or versatility
If the pipe is made with significant straight wall sections, then the pipe can be made more flexible for conduit applications, but the straight segments are more prone to inward distortion during cooling
Solution Approach 1:
The corrugation height varies locally along the elongate wall segments, creating a truss-like structure that provides targeted reinforcement. This allows the pipe to maintain flexibility for conduit applications while resisting inward distortion during cooling through the strategically positioned taller central corrugations
Solution Approach 2:
The pipe employs a composite structural design combining straight wall sections with variable height corrugations. This composite approach integrates flexible straight segments with reinforced truss-like corrugated portions, achieving both adaptability for conduit applications and stability against distortion during cooling
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The truss-like structure effectively maintains the pipe's shape during manufacturing and enhances its load-carrying capability, reducing distortion and maintaining fluid flow efficiency while allowing for faster production speeds.
Implementation Method 1
These mold blocks are also designed to remove heat from the extruded plastic to generally set the corrugated pipe at the exit of the mold block tunnel
Implementation Method 2
The product at this time is subject to continued shrinkage as the plastic cools and the product is also subject to gravitational forces that can cause distortion
Implementation Method 3
the product is also subject to gravitational forces that can cause distortion
Data Source
AI summary
A corrugated pipe having a non circular in cross section profile and at least one generally elongate wall section is improved by using a variable height corrugation in the length of the elongate wall segment. The variable height corrugation is of a greatest height at a center portion thereof and decreases in height towards the end points of the elongate wall segment. A spanning type truss arrangement is formed that opposes inward deflection of the straight wall segment.