Spiral Hose Reinforcement Structure for 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 burst strength but reduce flexibility, and reducing reinforcement leads to a shorter lifespan.
Innovation Solution
The spiral hose design features a second reinforcement package with wires of smaller diameter than the first package, wound in opposite directions, and a specific wire packing percentage to increase flexibility while maintaining high burst strength, with a larger tube thickness and a rubber cover layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If reinforcement layers are added to increase burst strength, then the strength is improved, but the flexibility deteriorates
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 smaller than the first diameter. This local differentiation allows the outer layer to be more flexible while the inner layer provides substantial strength support, resolving the contradiction between overall strength and flexibility.
2Ease of operation
If reinforcement layers are reduced to increase flexibility, then the flexibility is improved, but the lifespan deteriorates
Solution Approach 1:
By using smaller diameter wires in the outer second reinforcement package, the patent achieves enhanced flexibility in the regions most subject to bending and movement, while the inner first reinforcement package with larger diameter wires continues to provide substantial structural support and durability, thereby extending lifespan without sacrificing flexibility.
Solution Approach 2:
The patent creates a composite reinforcement structure combining two different wire configurations: an inner layer with larger diameter wires for strength and durability, and an outer layer with smaller diameter wires for flexibility and abrasion resistance. This composite approach allows the hose to achieve both extended lifespan and improved flexibility simultaneously.
3Ease of operation
If wire diameter in second reinforcement package is reduced to increase flexibility, then the flexibility is improved, but the abrasion resistance may deteriorate
Solution Approach 1:
The patent changes the wire diameter parameter in the second reinforcement package to be smaller than in the first package. This parameter change increases flexibility while the surrounding rubber cover layer and the inner first reinforcement package with larger wires compensate for and maintain abrasion resistance, achieving a balance between flexibility and protection against harmful factors.
Data Source
Figure 1~2
AI summary
The invention relates to a spiral hose (1), comprising: – a tube (2) with a first wall thickness (tI); – a first reinforcement package (3), arranged around the circumference of the tube (2), comprising a first rubber layer (8) embedding at least one set of a first and second layer of wire (6; 7) wound in a helical path around the tube (2), wherein the winding direction of the first layer (6) is opposite from the winding direction of the second layer (7), which first reinforcement package (3) has a first package thickness (tR1); – a second reinforcement package (4), arranged around the circumference of the first reinforcement package (3), comprising a second rubber layer (11) embedding at least a second set of a third (9) and fourth layer (10) of wire wound in a helical path around the first reinforcement package (3), wherein the winding direction of the third layer (9) is opposite from the winding direction of the fourth layer (10), which second reinforcement package (4) has a second package thickness (tR2); and - a cover layer (5), arranged around the circumference of the second reinforcement package (4), with a cover package thickness (tC) wherein the diameter of the wires (9; 10) in the second reinforcement package (4) is smaller than the diameter of the wires (6; 7) in the first reinforcement package (3).