Corrugated Fluid Line Braid Structure Against Pressure Expansion
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Solution Overview
Problem
Conventional corrugated pipes are unsuitable for high-pressure fluid transport due to their tendency to increase in length and diameter with internal pressure, leading to potential failure under high-pressure conditions.
Innovation Solution
A high-pressure fluid line featuring a corrugated tube with a sequence of wave crests and troughs, surrounded by a mesh of threads with a constant braiding angle, connected at two ends, and optionally with varying mesh sizes at crests and troughs, creating a scissor mechanism that balances forces to prevent elongation and radial expansion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a corrugated pipe is used for fluid transport, then it can accommodate pressure changes, but its length increases and diameter expands under internal pressure, leading to structural instability
Solution Approach 1:
The braid is designed with a constant braiding angle that allows dynamic adjustment of the mesh structure under pressure. As internal pressure increases, the braid dynamically contracts in diameter while preventing excessive longitudinal expansion, creating a self-regulating mechanism that maintains structural stability across varying pressure conditions
Solution Approach 2:
The invention changes the geometric parameters of the reinforcement structure by using a constant braiding angle configuration. This parameter choice causes the braid to transform from a rigid constraint into a dynamic structure that converts radial pressure into longitudinal tension, thereby controlling the pipe's dimensional changes under pressure
2Stability of the object's composition
If a corrugated pipe is used for fluid transport, then it can accommodate pressure changes, but its diameter increases under internal pressure, leading to structural instability
Solution Approach 1:
The braid's mesh structure dynamically responds to internal pressure by contracting in diameter. The constant braiding angle ensures that as pressure increases, the braid tightens radially, converting the expansive force into a constraining mechanism that actively reduces diameter increase and maintains structural stability
Solution Approach 2:
The invention converts the harmful effect of internal pressure (which causes diameter expansion) into a beneficial effect. The pressure itself drives the braid to contract and tighten, transforming the expansive force into a self-constraining mechanism that prevents excessive diameter increase and enhances structural stability
3Strength
If a braid with constant braiding angle is applied to the corrugated tube, then the pipe can withstand high pressure, but the braid diameter reduces when the tube stretches
Solution Approach 1:
The braid is designed with inherent dynamic characteristics through its constant braiding angle configuration. This allows the braid to automatically adjust its diameter in response to tube stretching, creating a coupled system where longitudinal expansion of the tube directly drives radial contraction of the braid, thereby maintaining pressure resistance during deformation
Solution Approach 2:
The invention creates a composite structure combining the corrugated tube and braid with different functional properties. The tube provides flexibility and pressure accommodation, while the braid provides strength and dimensional control. The interaction between these two components creates a synergistic effect where the braid's diameter reduction compensates for the tube's stretching, maintaining overall structural integrity under high pressure
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 design allows the fluid line to withstand several times the internal pressure of conventional corrugated pipes, with pressures up to 100 bar achieved in experiments, and prevents structural failure by maintaining a stable diameter and length.
Implementation Method 1
a stretching of the corrugated tube in the longitudinal direction is accompanied by a reduction in the diameter of the mesh
Implementation Method 2
this also stretches the braid surrounding the corrugated tube, causing it to contract in diameter in a manner similar to a scissor mechanism
Implementation Method 3
by the material from which the corrugated tube is made, which offers resistance to the reduction in the diameter of the braid
Implementation Method 4
by the pressure of the fluid from the side of the fluid flow channel of the corrugated tube
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a high-pressure fluid line (10) comprising a corrugated pipe (12) and a braiding (18) made of fibers (20), said braiding being attached to the external circumference of the corrugated pipe (12). The braiding (18) lies against the external circumference of the corrugated pipe (12) in a tight-fitting manner and has a substantially constant braiding angle over the entire corrugated pipe (12), wherein the braiding (18) and the corrugated pipe (12) are connected together at at least two separate points such that the extension of the corrugated pipe (12) in the longitudinal direction involves a reduction in the diameter of the braiding (18). Alternatively to the connection, the braiding (18) can have a smaller mesh size (28) in the region of the corrugation valleys (16) than in the region of the corrugation peaks (14). The invention additionally relates to a pipe assembly.