Braided High-Pressure Hose Structure for Flexibility and Burst Resistance
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Solution Overview
Problem
Conventional high-pressure hoses for pressure washers are either too hard, leading to damage and safety risks during use, or lack sufficient blast resistance, compromising their effectiveness in garden irrigation and maintenance.
Innovation Solution
A high-pressure hose design featuring an inner hose, an outer hose, and an interlayer with a braided layer made of high-strength polyester industrial filament, where the braided yarns intersect at angles between 60° to 90°, forming a cylindrical structure, providing both flexibility and blast resistance, and is fixedly connected to the inner and outer hoses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the hose body is made hard to ensure good blast resistance, then the pressure-bearing performance is improved, but the flexibility deteriorates and the hose generates torque when twisted
Solution Approach 1:
The hose is segmented into multiple functional layers: an inner hose layer for fluid conveyance, an interlayer with braided reinforcement for pressure resistance, and an outer hose layer for protection. This segmentation allows each layer to specialize in one function, resolving the contradiction between overall strength and flexibility.
Solution Approach 2:
The hose employs composite material construction with different materials for each layer. The interlayer uses braided yarn made of high-strength fibers (such as polyester or nylon) woven at specific angles (45-60 degrees), combined with the inner and outer hose materials to create a composite structure that simultaneously achieves high burst resistance and flexibility.
2Strength
If the hose body is made hard to ensure good blast resistance, then the pressure-bearing performance is improved, but the hose body may easily occur damage after long-term use
Solution Approach 1:
By dividing the hose into multiple layers with distinct functions, the stress from high pressure is distributed across different layers rather than concentrated in a single hard structure. The braided interlayer specifically absorbs circumferential stress, protecting the inner hose from damage during long-term use.
Solution Approach 2:
The composite structure combines materials with different mechanical properties. The braided interlayer uses high-tensile-strength fibers arranged in a woven pattern that resists bursting while maintaining elasticity. This composite approach prevents the hose body from becoming brittle and prone to damage over time.
3Strength
If the hose body is made hard to ensure good blast resistance, then the pressure-bearing performance is improved, but safety risks to the user during operation increase
Solution Approach 1:
The multi-layer segmented structure includes a flexible inner hose layer that can deform and absorb energy during pressure fluctuations. This prevents the formation of rigid stress concentrations that could lead to sudden hose failure and user injury, while still maintaining high burst resistance through the reinforced interlayer.
Solution Approach 2:
The composite construction with braided reinforcement creates a hose that is strong yet compliant. The high-strength fibers in the interlayer prevent bursting at high pressures, while the overall composite structure maintains enough flexibility to avoid creating rigid whip effects or sudden breaks that could harm users during operation.
Data Source
AI summary
The disclosure provides a high-pressure hose of a pressure washer and a pressure washer. The high-pressure hose of a pressure washer includes an inner hose, an outer hose and an interlayer. The inner hose defines a fluid flow passage. The outer hose covers the inner hose. And the interlayer is arranged between the inner hose and the outer hose. The interlayer at least includes a braided layer. The braided layer is provided with by a latticework of interwoven yarn to be a cylindrical structure, and covers an outer wall of the inner hose. The high-pressure hose of the disclosure has both good pressure-bearing performance and good softness, which improves a user's experience.