Cable Tie With Wedge Compensation for Hose Sealing Pressure
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Solution Overview
Problem
Cable ties used in medical applications to secure hoses to pipes face issues with reduced contact pressure due to material shrinkage or loss of elasticity, leading to leakage problems, particularly at the cable tie head where the tie does not lie flat, requiring specialized shapes for different hose diameters.
Innovation Solution
A cable tie design incorporating a compensating piece with a wedge-shaped cross section and a flat contact surface, allowing for optimal adaptation to specific applications, maintaining contact pressure through slight surface movement and deformation, and compatible with standard injection-molded ties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If the cable tie head is shaped to rest on the hose over a large circumferential surface area, then the contact pressure distribution is improved, but the device complexity increases due to specialized shapes for different hose diameters
Solution Approach 1:
The cable tie system is divided into two independent parts: a standard cable tie body and a separate compensating piece. The compensating piece can be detached and replaced, allowing the same cable tie body to work with different compensating pieces for various hose diameters. This segmentation resolves the contradiction by maintaining simple standard cable ties while achieving adaptable contact pressure distribution through interchangeable compensating pieces.
Solution Approach 2:
The standard cable tie body is designed to be universal and can be combined with different compensating pieces to serve multiple hose diameter applications. The compensating piece acts as an adapter that provides the necessary shape adaptation without requiring different cable tie bodies, thus achieving multi-functionality while keeping the main component simple and standardized.
2Reliability
If material shrinkage or loss of elasticity occurs in the hose, then the contact pressure decreases leading to leakage, but replacing the entire cable tie increases cost and complexity
Solution Approach 1:
The compensating piece is designed with elastic properties that allow it to dynamically adapt to changes in hose diameter due to material shrinkage or loss of elasticity. As the hose shrinks or loses elasticity over time, the elastic compensating piece deforms to maintain optimal contact pressure, providing continuous sealing reliability without requiring replacement of the entire cable tie assembly.
Solution Approach 2:
The compensating piece is made from elastic material that can change its physical parameters (shape, volume) in response to environmental conditions and hose changes. This parameter change capability allows the compensating piece to compensate for hose material shrinkage and maintain sealing pressure, resolving the reliability issue without increasing overall device complexity.
3Adaptability or versatility
If a compensating piece is added to adapt to specific applications, then the adaptability improves, but the device complexity increases
Solution Approach 1:
The compensating piece acts as an intermediary element between the standard cable tie body and the hose. It mediates the size and shape differences, allowing the standardized cable tie to work with various hose diameters. This intermediary approach provides adaptability while keeping the main cable tie component simple and standardized, reducing the overall complexity compared to designing specialized cable ties for each application.
Solution Approach 2:
The compensating piece is designed as a simple, inexpensive component that can be easily manufactured and replaced if needed. By making the adaptability component cheap and simple rather than modifying the entire cable tie, the system achieves versatility without significant complexity increase. The compensating piece can be produced in various sizes for different applications using simple molding processes.
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 solution ensures a secure and consistent contact pressure across varying hose diameters, maintaining effectiveness even with material changes or shrinkage, using inexpensive and adaptable compensation pieces that can be easily integrated with standard cable ties.
Implementation Method 1
the tubing material can shrink slightly or lose its elastic properties due to aging or sterilization. This reduces the contact pressure between the hose and the pipe section
Data Source
Figure 1~3
Figure 4~5
Figure 6~7
AI summary
The invention relates to a cable tie having a head piece (8) and a strap (6, 9), which can be pushed into the head piece, thereby fixing itself in a latching manner, wherein a wedge-shaped compensation piece (5, 7), which can be positioned in the region of the head piece (8), is threaded onto the strap (6, 9) in order to bound a hollow space together with the strap.