Integrated Plastic Pressure Hose for Uniform Water Flow
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Solution Overview
Problem
Existing pressure hoses for water-carrying systems in sanitary applications suffer from reduced water flow and pressure due to irreversible compression at the connecting zone, and the use of metal alloys is costly and labor-intensive, with price fluctuations affecting production costs.
Innovation Solution
A pressure hose with a corrugated inner hose and integrated connecting piece, produced via extrusion, eliminates the need for separate connecting pieces, ensuring uniform flow and cost-effective manufacturing by using plastic materials like polyphenylsulfone, which provides high temperature resistance and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a separate connecting piece made of metal alloy is used with press-fitting, then the connecting piece can be securely attached to the hose end, but the inner hose is irreversibly compressed with narrowing of cross section, reducing water flow and pressure
Solution Approach 1:
The connecting piece is merged with the inner hose to form a single integrated component made of plastic. This eliminates the need for separate metal connecting pieces and press-fitting processes, preventing compression and cross-section narrowing of the inner hose, thereby maintaining uniform water flow and pressure throughout the hose assembly
Solution Approach 2:
The material of the connecting piece is changed from metal alloy to plastic, matching the material of the inner hose. This parameter change eliminates material incompatibility issues, prevents compression effects, and allows the connecting piece to be produced in the same extrusion process as the inner hose, maintaining structural uniformity and flow characteristics
2Strength
If metal alloys are used for connecting pieces, then the connecting piece provides sufficient mechanical strength, but the raw material cost is high with significant price fluctuations, increasing production costs
Solution Approach 1:
The material parameter is changed from metal alloy to plastic for the connecting piece. This substitution eliminates the high and fluctuating costs associated with metal raw materials while maintaining sufficient mechanical strength through the integrated plastic design, thereby stabilizing production costs and improving economic viability
Solution Approach 2:
The connecting piece is made from the same plastic material as the inner hose, creating material homogeneity throughout the entire hose assembly. This eliminates the need for material transitions between metal and plastic, simplifies manufacturing, and reduces overall material costs while maintaining structural integrity
3Ease of manufacture
If connecting pieces are made of metal alloys, then the connecting piece can be produced with standard manufacturing processes, but the machining process is laborious and time-consuming, increasing production time and cost
Solution Approach 1:
The production process is merged by manufacturing the connecting piece and inner hose as a single integrated component in one continuous extrusion process. This eliminates the need for separate machining operations on metal connecting pieces, significantly reducing production time and labor costs while maintaining manufacturing standardization through the extrusion process
Solution Approach 2:
The mechanical machining process for metal connecting pieces is replaced with a plastic extrusion process. This substitution eliminates laborious machining operations, reduces production time, and allows for continuous automated manufacturing of the integrated plastic hose assembly with connecting pieces
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 solution maintains uniform flow conditions and eliminates the need for costly metal alloys, offering improved flow behavior, cost-effectiveness, and reduced production complexity while meeting standards for drinking water installations.
Implementation Method 1
The inner hose and the connecting piece are formed as one piece and are produced via extrusion in a common extrusion process
Data Source
AI summary
A pressure hose (1) for a water-carrying system is shown and described, especially for connecting sanitary taps or for connecting parts of the water-carrying system, having a corrugated inner hose (2) made of plastic, wherein at least one hose end (3, 5) of the pressure hose (1) is provided with a connecting piece (4, 6), designed such that it differs from the inner hose (2), for joining the pressure hose (1) to a complementarily designed connecting piece of a sanitary tap and/or a part of the water-carrying system. According to the invention, it is provided that the inner hose (2) and the connecting piece (4, 6) are formed as one piece and the inner hose (2) and the connecting piece (4, 6) are preferably produced via extrusion in a common extrusion process.