Press-Fit Pipe Connection with Conical Ring Compression
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Solution Overview
Problem
Existing press-fitting systems for connecting fittings to pipes lack sufficient pull-out protection and burst resistance, especially under extreme mechanical loads.
Innovation Solution
The press-fitting system incorporates a conical distal press section and a conical proximal press section, which reshape the cutting ring and sealing ring radially inwardly during pressing, resulting in deeper penetration of distal cutting elements into the pipe material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a cylindrical press section is used for pressing the fitting, then the pressing process is simple and uniform, but the pull-out resistance and burst resistance are insufficient
Solution Approach 1:
The press contour is segmented into three distinct press sections: a cylindrical press section for uniform pressing, a distal conical press section for reshaping the cutting ring and increasing penetration depth, and a proximal conical press section for reshaping the sealing ring. This segmentation allows each section to perform its specific function optimally, resolving the contradiction between simple pressing and high connection strength.
Solution Approach 2:
Different regions of the press contour are given different geometric properties: the cylindrical section provides uniform radial compression, while the conical sections provide progressive deformation and deeper penetration at specific locations. This local differentiation of press characteristics enables both ease of manufacture and high connection strength.
2Ease of operation
If the cutting ring is pressed uniformly radially inward, then the pressing process is straightforward, but the cutting elements do not penetrate deep enough into the pipe material
Solution Approach 1:
The press contour introduces asymmetry through the conical press sections that create non-uniform radial deformation of the cutting ring. The distal conical section causes the distal end of the cutting ring to be reshaped more aggressively, resulting in deeper penetration of distal cutting elements into the pipe material, while maintaining operational simplicity.
3Strength
If a non-releasable connection is created, then the connection strength is high, but the connection cannot be dismantled without destroying components
Solution Approach 1:
The cutting elements are designed to penetrate the pipe material during the pressing operation, creating mechanical interlocking and deformation bonds before any potential dismantling attempt. This preliminary penetration action ensures strong connection strength that can only be separated by destroying the pipe or fitting, providing clear structural separation between reusable and consumable components.
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
This design enhances the pull-out resistance and burst resistance of the connection by ensuring deeper penetration of cutting elements and improved radial deformation of the cutting ring, thereby providing a stronger non-detachable connection between the fitting and the pipe.
Implementation Method 1
the distal press portion is formed to reshape the distal end of the cutting ring radially inwardly when the press sleeve is pressed radially
Implementation Method 2
deeper penetration of distal cutting elements into the pipe material
Data Source
AI summary
A press connection system for non-releasably connecting a fitting to a pipe, with a press jaw, with a press contour formed on the inside of the press jaw. The press contour has a cylindrical press section, with a fitting, with a fitting base body and a press sleeve forming a press chamber. A sealing ring is arranged at the proximal end of the press chamber relative to the fitting base body and a cutting ring is arranged at the distal end of the press chamber relative to the fitting base body. The cutting ring has a central cylindrical section and cutting elements arranged at the distal end and cutting elements arranged at the proximal end. Also a swaged fitting.