Braided Corrugated Fluid Line for High-Pressure Stability
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Solution Overview
Problem
Corrugated tubes are unsuitable for high-pressure fluid lines due to their tendency to increase in length and diameter with internal pressure, leading to instability and inability to withstand high pressures.
Innovation Solution
A high-pressure fluid line comprising a corrugated tube with a braiding of threads applied to its outer periphery, where the braiding has a constant angle and is connected at multiple locations, creating a scissor mechanism that reduces diameter upon stretching, counteracting pressure and establishing a force equilibrium to prevent further extension or expansion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a corrugated tube is used as a high-pressure fluid line, then the tube can be flexible and easy to install, but the tube increases in length and diameter with internal pressure, leading to instability and inability to withstand high pressures
Solution Approach 1:
The invention combines a corrugated tube with a braiding layer made of tension-resistant material (such as steel wires or high-strength polymers) to create a composite structure. The braiding layer is wrapped around the corrugated tube in a helical pattern with a specific angle (typically 30-60 degrees), providing tensile strength to counteract the tube's tendency to expand under pressure while preserving the tube's flexibility and corrugated geometry for ease of installation.
Solution Approach 2:
The braiding layer is designed with a specific braiding angle that allows it to dynamically adjust its mechanical properties under pressure. When internal pressure increases, the braiding layer experiences increased tension, which naturally tightens the structure and reduces the braiding angle, thereby increasing resistance to further expansion. This dynamic response enables the fluid line to automatically stabilize under high pressure conditions.
2Stress or pressure
If the braiding angle is increased to improve pressure resistance, then the diameter reduction effect is enhanced, but the longitudinal strength and ability to withstand axial loads is reduced
Solution Approach 1:
The invention optimizes the braiding angle parameter within a specific range (30-60 degrees) to achieve a balance between radial and longitudinal strength. This optimal angle range provides sufficient radial compression effect to control diameter expansion under pressure while maintaining adequate longitudinal strength to withstand axial loads. The specific angle is selected based on the intended pressure conditions and application requirements.
Solution Approach 2:
The use of composite materials with different mechanical properties in the braiding layer allows compensation for the trade-off between braiding angle effects. By selecting materials with appropriate tensile strength and elasticity, the system can achieve both radial pressure resistance and longitudinal strength even at optimized braiding angles, as the material properties compensate for the geometric constraints.
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 enables high-pressure fluid lines to withstand multiple times the internal pressure of conventional corrugated tubes, with pressures up to 100 bar achieved, as the braiding's contraction and material resistance prevent diameter reduction and radial expansion, ensuring stability and safety.
Implementation Method 1
stretching of the corrugated tube in the longitudinal direction is accompanied by a reduction in diameter of the braiding
Implementation Method 2
the braiding surrounding the corrugated tube is also stretched and contracts in the manner of a scissor mechanism with respect to its diameter
Implementation Method 3
the material from which the corrugated tube is produced offers a resistance to the diameter reduction of the braiding
Data Source
AI summary
A high-pressure fluid line including a corrugated tube defining a fluid flow channel its interior, wherein a wall of the corrugated tube, in parallel with the extension direction of the fluid flow channel, comprises a sequence of wave peaks and wave troughs. The fluid line includes a braiding made of threads, which is applied to an outer periphery of the corrugated tube. The braiding bears tightly against the outer periphery of the corrugated tube at a substantially constant braiding angle over the entire corrugated tube. The braiding and the corrugated tube are connected at least at two mutually separate locations such that stretching of the corrugated tube in a longitudinal direction is accompanied by a reduction in a diameter of the braiding.