Rapid Connector Insert Geometry for Low-Stress Fluid Line Insertion
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Solution Overview
Problem
Quick-action connector devices for fluid lines often suffer from damage during the insertion of fluid lines due to the mismatch in diameters between the welding ring and the connector device, leading to mechanical stress and potential breakage.
Innovation Solution
An insert piece with a hollow-cylindrical main body featuring a passage section that widens towards the front ring surface, providing an inclined surface to distribute the force transmitted by the fluid line, reducing shear stress and incorporating a round edge and bevel for improved guidance and stress distribution, along with fiber-reinforced materials for enhanced durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the welding ring has an outer diameter minimally larger than the inner diameter of the quick-action connector device, then the welding ring bears against the inner wall for positioning, but this causes high mechanical stress and damage during fluid line insertion
Solution Approach 1:
The insert piece is divided into multiple functional sections: a bearing section with a first diameter for positioning against the inner wall, and a passage section with a second diameter for guiding the fluid line. This segmentation allows each section to perform its specific function optimally without compromising the other.
Solution Approach 2:
Different sections of the insert piece have different diameters tailored to their specific functions. The bearing section has a larger diameter for stable positioning, while the passage section has a smaller diameter for smooth fluid line insertion. This local differentiation resolves the contradiction between positioning accuracy and stress resistance.
2Device complexity
If the passage opening has a uniform diameter, then the structure is simple, but this causes high shear forces and breakage risk during fluid line introduction
Solution Approach 1:
The passage opening transitions from a uniform diameter to a dynamic structure with varying diameter along its length. The passage section has a reduced diameter compared to the bearing section, creating a tapered geometry that dynamically adapts to the insertion process and reduces shear forces on the fluid line.
3Adaptability or versatility
If the fluid line is introduced at an angle to the passage opening, then flexibility is improved, but this increases shear forces and causes insert piece breakage
Solution Approach 1:
The insert piece extends beyond the inner wall surface in the radial direction, creating a three-dimensional structure with a bearing section that protrudes from the connector device. This additional dimension allows the bearing section to absorb angular misalignment and guide the fluid line at various angles without transmitting excessive shear forces to the passage section.
Data Source
AI summary
An insert piece for inserting into a rapid connector device for fluid lines. The insert piece comprises a hollow cylindrical main part, and the hollow cylindrical main part extends between a front annular surface and a rear annular surface along a cylinder axis and has a passage opening extending along the cylinder axis and an outer lateral surface for arranging on the inner wall of a rapid connector device The passage opening has a passage section which expands in the direction of the front annular surface. The insert piece can prevent a fluid line and/or a rapid connector device from being damaged.