Spiral Hose Reinforcement Layout for Burst Strength and Flexibility
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Solution Overview
Problem
Spiral hoses used for high-pressure fluid transport face a trade-off between maintaining strength and flexibility, where reinforcement layers enhance pressure resistance but reduce flexibility, and reducing reinforcement layers compromises hose lifespan.
Innovation Solution
A spiral hose design featuring a first reinforcement package with larger diameter wires and a second reinforcement package with smaller diameter wires, wound in opposite directions, along with a cover layer, to achieve increased flexibility while maintaining high burst strength and low abrasion resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If reinforcement layers are added to increase burst strength, then the hose can sustain higher pressures, but the flexibility of the hose decreases
Solution Approach 1:
The patent applies different wire diameters in different reinforcement packages: the first reinforcement package uses wires with a first diameter, while the second reinforcement package uses wires with a second diameter that is 0.05-0.15mm smaller. This local differentiation allows the inner layer to provide stronger structural support for burst resistance, while the outer layer with smaller wires maintains flexibility and conforms better to the tube surface.
Solution Approach 2:
The hose employs a composite structure with multiple reinforcement packages containing wire layers embedded in rubber layers. This composite design combines the high strength of metal wires with the flexibility and damping properties of rubber, achieving both burst resistance and operational flexibility through material composition rather than relying solely on wire thickness.
2Ease of operation
If reinforcement layers are reduced to increase flexibility, then the hose becomes more flexible, but the life span of the hose reduces
Solution Approach 1:
By implementing local quality differentiation through varying wire diameters in different reinforcement packages, the patent achieves optimal flexibility without compromising overall structural integrity. The smaller wires in the second package provide sufficient reinforcement for longevity while allowing the hose to bend and flex during operation.
Solution Approach 2:
The opposing winding directions of wire layers in different reinforcement packages create a dynamic structural balance that allows the hose to adapt to bending stresses during flexing while maintaining structural coherence for long-term durability.
3Ease of operation
If wire diameter in second reinforcement package is reduced, then flexibility increases, but abrasion resistance may be compromised
Solution Approach 1:
The patent carefully controls the wire diameter parameter in the second reinforcement package, reducing it by a specific amount (0.05-0.15mm) compared to the first package. This precise parameter adjustment optimizes flexibility while the wire diameter remains sufficient to maintain adequate abrasion resistance when combined with the rubber cover layer.
Solution Approach 2:
The combination of smaller diameter wires embedded in a rubber layer within the second reinforcement package creates a composite structure that provides both flexibility and protection against abrasion, as the rubber matrix protects the thinner wires while allowing the assembly to bend without excessive stiffness.
Data Source
AI summary
A spiral hose includes: a tube with a first wall thickness; a first reinforcement package, arranged around a circumference of the tube, having a first rubber layer embedding at least one set of a first and second layer of wire wound in a helical path around the tube, a winding direction of the first layer being opposite from a winding direction of the second layer, which first reinforcement package has a first package thickness; a second reinforcement package, arranged around a circumference of the first reinforcement package, having a second rubber layer embedding at least a second set of a third and fourth layer of wire wound in a helical path around the first reinforcement package, a winding direction of the third layer being opposite from a winding direction of the fourth layer, which second reinforcement package has a second package thickness; and a cover layer.