Corrugated Extensible Hose Structure for Clean High-Pressure Irrigation
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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 burst pressure, elongation, and resistance to dirt accumulation, while maintaining a smooth outer surface and efficient water flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a textile sheath is used to cover the hose, then the hose is protected, but the sheath becomes dirty and difficult to clean, and the hose may burst at low pressure
Solution Approach 1:
The patent changes the material parameters of the outer sheath from traditional textile to a smooth, non-porous material that resists dirt accumulation. This material parameter change allows the sheath to remain clean while maintaining protective function, and simultaneously increases the burst pressure resistance from low to at least 25 bar.
Solution Approach 2:
The hose employs a composite structure with multiple layers including an inner tube, reinforcement layer, and outer sheath made of different materials. This composite design combines the protective function of the sheath with high burst pressure resistance and dirt resistance properties, resolving the contradiction between protection and dirt accumulation.
2Productivity
If the hose is designed to stretch under pressure, then water flow rate increases, but the hose becomes difficult to stretch and requires high pressure
Solution Approach 1:
The patent modifies the elastic properties and structural parameters of the hose to achieve optimal stretching behavior. The hose is designed to stretch easily under normal operating pressure (at least 100% elongation at 3 bar) while maintaining controlled maximum elongation, thereby ensuring good water flow rate without requiring excessive pressure.
Solution Approach 2:
The hose structure incorporates localized features such as corrugations in specific sections that facilitate stretching in those areas while maintaining structural integrity elsewhere. This local quality adjustment enables easy stretching for water flow while preventing uncontrolled expansion.
3Length of moving object
If the hose is designed for high elongation, then stretching performance improves, but the hose may rotate under pressure
Solution Approach 1:
The patent introduces asymmetric features such as helical reinforcements or corrugations with specific pitch and orientation that prevent rotational movement while allowing longitudinal stretching. This asymmetric structure creates resistance to rotation under pressure while maintaining the desired high elongation capability of at least 100% at 3 bar.
Solution Approach 2:
The hose incorporates structural elements that operate in a different dimension (helical or spiral configurations) to counteract rotational forces while permitting axial elongation. This dimensional approach allows the hose to stretch lengthwise without rotating, resolving the contradiction between elongation and rotational stability.
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 water flow rate while preventing dirt accumulation and maintaining a smooth surface, making it suitable for irrigation in limited spaces like terraces and gardens.
Implementation Method 1
a first bearing layer in an elastically extensible first polymeric material, a reinforcement wound on said first layer, a stabilizing second layer in an elastically extensible second polymeric material
Implementation Method 2
At the passage of the pressurized water the hose dilates and stretches to fill the textile sheath
Data Source
Figure 1a~1c
Figure 2~4
Figure 5
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).