Press Fitting Sleeve Geometry for Higher Pull-Out Resistance
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Solution Overview
Problem
Existing press connection systems for pipeline fittings lack sufficient pull-out and bursting resistance, especially under extreme mechanical stresses.
Innovation Solution
The press connection system incorporates a conical distal press section and a cylindrical proximal press section, which radially convert the cutting ring to increase the penetration depth of distal cutting elements, enhancing the connection's resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a cylindrical press section is used to radially deform the pressing sleeve, then the pressing process is simple and uniform, but the penetration depth of cutting elements is insufficient and pull-out resistance is low
Solution Approach 1:
The press contour is segmented into three distinct sections: a cylindrical press section for uniform deformation, a distal conical press section for increased penetration depth, and a proximal conical press section for controlled deformation. This segmentation allows each section to perform its specific function optimally, resolving the contradiction between simplicity and effectiveness.
Solution Approach 2:
Different sections of the press contour are given different geometric properties (cylindrical vs. conical) to create localized deformation zones. The conical sections specifically target the distal end of the cutting ring to achieve deeper penetration, while the cylindrical section maintains uniform deformation in other areas. This local differentiation resolves the contradiction by applying complexity only where needed.
2Reliability
If distal cutting elements penetrate deeper into the pipe, then burst resistance increases, but the pressing process becomes more complex
Solution Approach 1:
The distal conical press section introduces a curved, tapered geometry that naturally guides the cutting elements to penetrate deeper into the pipe wall. The conical shape creates a progressive deformation zone that forces the distal cutting elements to follow a curved path deeper into the material, achieving enhanced burst resistance through geometric design rather than complex mechanical mechanisms.
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 achieves increased resistance to pull-out forces and bursting pressures by deeper penetration of distal cutting elements, resulting in a more secure and durable connection.
Implementation Method 1
the distal press section is designed to radially inwardly reshape the distal end of the cutting ring during a radial pressing of the press sleeve
Implementation Method 2
the cutting elements penetrate the pipe material to essentially the same depth... the penetration of the cutting elements into the pipe material fixes the pipe relative to the fitting in both axial directions
Implementation Method 3
A press section of a fitting, for example in the form of a press sleeve, is radially deformed inward with the pipe section inserted using a press jaw, creating a permanent, tight, and permanent connection
Data Source
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AI summary
Press-connection system for the non-releasable connection of a fitting to a pipe, having a pressing jaw (6), having a pressing contour (16), which is formed on the inner side of the pressing jaw (6), wherein the pressing contour (16) has a cylindrical pressing portion (16a), having a fitting (20), having a main fitting body (22) and having a pressing sleeve (26), which forms a pressing chamber (24), wherein a sealing ring (28) is arranged at the proximal end (30) of the pressing chamber (24), as seen relative to the main fitting body (22), and a cutting ring (32) is arranged at the distal end (34) of the pressing chamber (24), as seen relative to the main fitting body (22), and wherein the cutting ring (32) has a central cylindrical portion (32a) and cutting elements (32b) arranged at the distal end and cutting elements (32c) arranged at the proximal end. The technical problem is that of further improving the pull-out protection and bursting resistance of the press-connected fitting.