Barbed Pipe Coupling Seal for Gas Leakage Prevention
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Solution Overview
Problem
Existing pipe couplings face challenges in ensuring a secure seal, particularly when conveying gases, due to the limitations of the gasket ring's sealing mechanism.
Innovation Solution
A modified pipe coupling design featuring a spacer with a smaller inner diameter than the O-ring, which compresses and moves radially inward upon nut tightening, along with a deformable gripping member with barbs, to securely clamp the pipe and create a seal, utilizing an O-ring for enhanced sealing engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a gasket ring is used for sealing between the pipe and body, then the coupling can be assembled, but the seal is not secure when conveying gas
Solution Approach 1:
An O-ring is introduced as an intermediary sealing element between the pipe and the body. The O-ring is compressed by the spacer when the nut is tightened, creating a reliable gas-tight seal. This intermediary component specifically addresses the harmful effect of gas leakage while maintaining the overall coupling function.
2Strength
If the nut is tightened to compress the gripping member for pipe engagement, then the pipe is securely clamped, but the installation process becomes more complex
Solution Approach 1:
The coupling is divided into distinct functional segments: the gripping member for pipe clamping, the spacer for positioning and sealing, and the O-ring for sealing. This segmentation allows each component to perform its specific function independently, simplifying the overall assembly process while maintaining strong pipe clamping through the tapered compression mechanism.
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 design ensures a strong and reliable seal for pipes carrying gases, preventing leaks and maintaining integrity under pressure, while allowing for easy installation and disassembly.
Implementation Method 1
a resilient O-ring secured to an inner end of said sleeve... tightening of said nut over said external threads causes axial movement of said spacer, sealing engagement of said O-ring the said body and the pipe
Implementation Method 2
a deformable gripping member having an axially outwardly converging outer surface complementary to said axially outwardly converging internal nut surface, the gripping member having an internal surface with barbs extending radially inwardly therefrom... tightening of said nut causes... radially inward deformation of said gripping member such that said barbs clamp such pipe
Data Source
AI summary
A pipe coupling including an externally threaded body and an internally threaded nut. The nut's outer end includes an outwardly converging internal circular surface and a spacer is co-operable with the nut and body. The coupling further includes an O-ring and a deformable gripping member. The gripping member has an internal surface with barbs extending radially inwardly therefrom. An end of a pipe is insertable through said gripping member, spacer and O-ring into the body. Tightening of the nut causes axial movement of said spacer, sealing engagement of said O-ring to the body and pipe, and radially inward deformation of said gripping member such that said barbs clamp the pipe. The diameter of the O-ring is greater than that of the spacer at points where it is secured before tightening of the nut and less than that of the spacer when the nut has been tightened.