Coaxial Hose Coupling for Easier Inner and Outer Hose Assembly
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Solution Overview
Problem
Existing hose arrangements with inner and outer hoses of different diameters are difficult to connect, especially when one end is already connected, requiring significant effort and risking incorrect assembly or damage due to the rigidity of the hoses and limited visibility of the inner hose during connection.
Innovation Solution
A connecting device that allows for a decoupled connection of the inner and outer hoses, with the inner hose connector remaining visible and accessible, featuring a coaxial fluid passage design and thermoformable materials to reduce elasticity and facilitate easy assembly, including features like resilient webs and spacers to secure the connection without damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the inner hose and outer hose are connected to the connection device simultaneously, then the connection is secure, but the assembly process becomes complex and error-prone
Solution Approach 1:
The connection device is divided into two separate hose connectors: a first hose connector for the inner hose and a second hose connector for the outer hose. These connectors can be assembled independently and then joined together, transforming a single complex simultaneous connection into two simpler sequential connection steps. This segmentation reduces assembly complexity while maintaining connection security.
Solution Approach 2:
The first hose connector is pre-assembled with the inner hose before the outer hose connection is made. This preliminary action allows the inner hose connection to be established first, providing a stable base for the subsequent outer hose connection, thereby simplifying the overall assembly process while ensuring secure connections.
2Productivity
If one end of the hose assembly is already connected to a connection device, then the hose assembly is partially assembled, but the inner hose becomes inaccessible and invisible for the second connection
Solution Approach 1:
The first hose connector is designed with a receiving space that accommodates the second hose connector in a radial direction perpendicular to the longitudinal axis. This dimensional arrangement allows the inner hose to remain accessible from the side even after the first connection is made, enabling operators to reach and connect the inner hose to the second hose connector without disassembling the first connection.
3Stability of the object's composition
If the hoses are rigid in compression direction, then the hose assembly maintains structural stability, but the connection process becomes difficult and error-prone
Solution Approach 1:
The hose connectors are designed with specific geometric parameters including tapered surfaces with defined angles, rounded transition zones, and controlled wall thickness distributions. These parameter optimizations enable the rigid hoses to be connected easily through controlled deformation during assembly, while maintaining structural stability in the compressed state. The tapered geometry allows gradual engagement that reduces connection difficulty despite hose rigidity.
Data Source
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AI summary
The invention relates to an attachment device (66), comprising a first line connector (10), with a first fluid passage (12), and a second line connector (38), wherein the second line connector (38) surrounds the first line connector (10) such that a second fluid passage (68) is created between the first line connector (10) and the second line connector (38), which second fluid passage (68) is fluidically separated from the first fluid passage (12), wherein the second line connector (38) can be pushed onto the first line connector (10) from the end thereof situated opposite the hose attachment (14) of the first line connector (10). The invention further relates to a line arrangement comprising the attachment device (66) and to a corresponding connection method.