Corrugated Extensible Hose Structure for Burst Strength and Cleanability
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Solution Overview
Problem
Existing extensible hoses for gardening suffer from issues such as ease of breakage, dirt accumulation, low burst pressure, difficulty in stretching, and limited water flow rate, making them unsuitable for irrigation in terraces and gardens.
Innovation Solution
A corrugated hose design featuring a first elastically extensible polymeric material layer, a reinforcement layer, a stabilizing second polymeric material layer, and a soft elastic coating layer, which together provide high elongation, burst strength, and a smooth outer surface to prevent dirt accumulation, while maintaining a high water flow rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a textile sheath is used to cover the hose, then the hose is protected and can stretch, but the sheath becomes dirty and difficult to clean, and the hose may burst at low pressure
Solution Approach 1:
The patent uses a composite structure with an inner textile reinforcement layer (for strength and stretch) and an outer smooth polymeric coating layer (for dirt resistance). This combines the advantages of both materials: the textile provides structural integrity and elasticity, while the smooth coating prevents dirt accumulation and facilitates easy cleaning.
2Adaptability or versatility
If the hose is made extensible with high elongation, then it can adapt to limited spaces, but it becomes more prone to breakage and has lower burst pressure
Solution Approach 1:
The hose combines an inner layer of elastically extensible polymeric material (providing high elongation of at least 100% at 3 bar) with an outer reinforcement layer (textile or mesh) that provides structural strength and burst pressure resistance. The reinforcement layer is embedded within the polymeric material, creating a composite structure that simultaneously achieves both extensibility and reliability.
3Strength
If a corrugated sheath is used to protect the hose, then it provides structural support, but the hose has difficulty stretching and rotates under pressure
Solution Approach 1:
The patent uses a smooth outer surface with corrugations (ridges and grooves) formed in the polymeric coating layer. These corrugations provide structural support and compression resistance while maintaining the ability to stretch. The smooth curved surface prevents rotation under pressure by distributing forces evenly around the hose circumference.
4Weight of moving object
If the outer sheath is made very thin to reduce weight, then the hose is lighter and takes up less space, but the sheath easily decays and damages the reinforcement
Solution Approach 1:
The patent employs a composite structure where a thin outer polymeric coating layer (providing smooth surface and light weight) is combined with an inner reinforcement layer (textile or mesh providing structural strength). The reinforcement layer protects against decay and damage, while the thin coating maintains light weight and compactness when reeled.
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 hose achieves high elongation, burst pressure, and smooth operation with reduced dirt accumulation and increased water flow, making it suitable for gardening applications in limited spaces.
Implementation Method 1
a first bearing layer in an elastically extensible first polymeric material, a stabilizing second layer in an elastically extensible second polymeric material
Data Source
AI summary
An extensible corrugated hose comprises a first bearing layer (1) in a elastically extensible first polymeric material, a reinforcement (2) wound on said first layer (1), a stabilizing second layer (3) in an elastically extensible second polymeric material covering the reinforcement (2) for defining a corrugated single tubular body (4) with the first layer (1), a coating third layer (5) placed on the second layer (3) for covering the corrugated single tubular body (4).