Flared Spigot and Collar Assembly for Tubing Pullout Resistance
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Solution Overview
Problem
Conventional tubing coupling configurations fail to reliably secure tubing to spigots, often leading to leakage, dislodgment, and damage due to inadequate resistance to axial forces and cumbersome assembly processes.
Innovation Solution
A tubing retention system featuring a spigot with a flared extension and a collar that radially engages the tubing, allowing for secure coupling without damaging the tubing and requiring minimal special handling, utilizing an expandable collar that can be melted to enhance retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional tubing coupling configurations are used, then assembly is simpler, but the tubing may lose sealing engagement or become dislodged from the spigot
Solution Approach 1:
The collar is disposed around the tubing and the spigot extension is disposed within the collar, creating a nested structure where multiple components fit within each other. This nesting arrangement provides secure retention while maintaining a compact assembly
Solution Approach 2:
The spigot extension includes a flared portion that transitions from a narrower diameter to a wider diameter, creating a curved or tapered geometry. This flared shape provides a mechanical interference fit with the tubing, increasing resistance to axial forces and preventing dislodgment
2Strength
If conventional tubing coupling configurations are used, then the structure is simpler, but axial forces may damage the tubing
Solution Approach 1:
The flared portion of the spigot extension creates a tapered, curved geometry that distributes axial forces over a larger surface area of the tubing. This gradual transition prevents stress concentration and reduces the risk of tubing damage while maintaining structural strength
Solution Approach 2:
The coupling system combines multiple materials with different properties: the spigot body and extension provide structural support, the collar provides retention and force distribution, and the tubing provides fluid containment. This composite approach enhances overall strength and resistance to axial forces
3Ease of operation
If conventional tubing coupling configurations are used, then assembly is faster, but the coupling may be cumbersome to assemble
Solution Approach 1:
The collar is pre-disposed around the tubing before the spigot extension is inserted. This preliminary arrangement of components facilitates a straightforward assembly sequence where the spigot is simply inserted into the collar-tubing assembly, providing both ease of operation and secure coupling
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 system effectively secures tubing to spigots, increasing the pullout force required to dislodge the tubing, preventing leakage, and simplifying assembly while avoiding damage and special handling procedures.
Implementation Method 1
melting a portion of the collar to radially engage the coupling portion of the tubing around the spigot extension
Data Source
AI summary
Tubing retention systems are described herein. A tubing retention system includes a spigot, a tubing, and a collar. The spigot includes a spigot body and a spigot extension extending from the spigot body, wherein the spigot extension comprises a flared portion opposite to the spigot body and the spigot body and the spigot extension cooperatively define a spigot lumen. The tubing includes an outer surface and a tubing lumen, wherein a coupling portion of the tubing is disposed around the spigot extension, permitting fluid communication between the tubing lumen and the spigot lumen. The collar is disposed radially around the outer surface of the tubing and axially between the flared portion and the spigot body, wherein the collar radially engages the coupling portion of the tubing disposed around the spigot extension to axially and radially retain the tubing with the spigot.