Hose Coupling Press Fitting With Retrofittable Anti-Tear Ring
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Solution Overview
Problem
Current high-pressure hose couplings require multiple components for different nominal widths and applications, leading to increased storage needs and complexity, as they must be produced with and without tear-off protection for various applications.
Innovation Solution
A hose coupling design featuring a standard hose nipple with a deformable press fitting and a retrofittable anti-tear protection ring, which can be fixed using various holding means such as projections, grooves, or magnetic attraction, allowing the same coupling element to be used for both standard and high-pressure applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple standard hose couplings with and without tear-off protection are produced for different nominal widths, then reliability for different applications is improved, but device complexity and storage requirements increase
Solution Approach 1:
The hose coupling is designed with a universal structure that can function both as a standard coupling and as a coupling with tear-off protection. The press fitting includes a deformation zone that can be activated to create tear-off protection features, allowing the same component to serve multiple functions depending on the deformation applied during installation.
Solution Approach 2:
The press fitting's structural parameters are changed through controlled deformation during the pressing process. By adjusting the deformation zone characteristics and applying radial pressure, the press fitting transforms from a standard configuration to one with integrated tear-off protection, eliminating the need for separate component variants.
2Reliability
If tear-off protection is integrated into all hose couplings, then reliability under high pressure is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The tear-off protection feature is created dynamically during the installation process rather than being a static pre-formed structure. The deformation zone in the press fitting is activated by applying radial pressure during mounting, allowing the tear-off protection to form only when needed, simplifying the manufacturing of the base component.
Solution Approach 2:
The press fitting is pre-designed with a deformation zone that is prepared during manufacturing but not activated until installation. This preliminary preparation allows the component to be manufactured in a simple state, with the protective features being created in-situ during the pressing operation, reducing overall manufacturing complexity.
3Adaptability or versatility
If a deformable press fitting with deformation zone is used, then adaptability to different applications is improved, but manufacturing precision requirements increase
Solution Approach 1:
The press fitting is segmented into distinct functional zones: a deformation zone designed to undergo controlled plastic deformation, and stable zones that maintain their structural integrity. This segmentation allows the deformation zone to be optimized for adaptability while the other zones maintain manufacturing precision, reducing overall precision requirements.
Solution Approach 2:
Different regions of the press fitting have different quality requirements. The deformation zone is designed with specific local properties that allow controlled deformation, while other regions maintain higher precision. This local differentiation enables adaptability where needed without requiring high precision throughout the entire component.
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 reduces the number of components needed by enabling a single coupling element to serve both standard and high-pressure applications, with the anti-tear ring providing secure protection against pressure peaks and impulse loads, while minimizing storage requirements.
Implementation Method 1
a press fitting (30) that can be deformed under radial pressure
Implementation Method 2
fixed using various holding means such as projections, grooves, or magnetic attraction
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The coupling (10) has an interference fit (30) including ribs (31, 32) aligned to a high-pressure hose (20) at an inner jacket. A metal insert (22) is pressed between a hose nipple and the interference fit and released from plastic casings (21, 23) i.e. rubber coating, in a securing portion (A). A metallic tear-off protection ring (50) is fixed at the nipple and provided in the portion. Outer side of the ring is formed with a circumferential groove (55). The groove is located opposite to the ribs at interference fit, and receives material of the insert of the hose during radial compression.