Plastic Faucet Inlet Pipe Assembly With O-Ring Sealing
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Solution Overview
Problem
Existing faucet inlet pipe assemblies are costly, contain lead, and have poor sealing performance due to the use of copper and brass materials, which pose health risks and require multiple layers of sealing tape for adequate sealing.
Innovation Solution
A faucet inlet pipe assembly using plastic water pipes, plastic joints, sealing rings, and a metal nut with external threads, ensuring lead-free and stable connections through welding and interference fits, with sealing rings enhancing the sealing performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If copper water pipe and brass joints are used, then connection strength and durability are improved, but material cost increases and lead contamination occurs
Solution Approach 1:
The patent extracts and removes the harmful lead-containing materials (copper and brass) from the water flow path, replacing them with lead-free plastic materials while maintaining connection strength through alternative design features such as threading and sealing mechanisms.
Solution Approach 2:
The patent uses inexpensive plastic materials (PPR, PVC, or PE) that are lead-free and safe for water contact, replacing expensive copper and brass materials. The plastic components are designed to be cost-effective while meeting durability requirements through proper joint design.
2Strength
If copper water pipe and brass joints are used, then connection strength is improved, but sealing performance deteriorates requiring multiple sealing tape layers
Solution Approach 1:
The patent introduces plastic joints as intermediary components that provide built-in sealing features. These plastic joints act as mediators between the water pipe and metal fittings, incorporating sealing mechanisms such as O-rings, gaskets, or integrated sealing surfaces that eliminate the need for multiple sealing tape layers while ensuring reliable sealing.
3Object-affected harmful factors
If plastic water pipe and plastic joints are used, then material cost decreases and lead-free safety is achieved, but connection stability may be compromised
Solution Approach 1:
The patent employs composite construction by combining plastic water pipes and plastic joints with metal nuts or fittings. This composite approach leverages the advantages of both materials: plastic provides lead-free safety and corrosion resistance, while metal components provide strength and stability. The combination ensures connection stability without compromising health safety.
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 assembly achieves lower material costs, eliminates lead exposure, and provides superior sealing performance by using plastic materials and a metal nut design, ensuring safe and reliable water connections.
Implementation Method 1
an end of the plastic water pipe is inserted into an end of the first water inlet channel and is welded with an inner wall of the first annular connection port
Implementation Method 2
the second sealing rings are sleeved outside the second plastic joint and is in interference fit with an inner wall of the metal nut
Data Source
AI summary
A faucet water inlet pipe assembly and an assembly method thereof are provided, which relate to the technical field of faucets. The faucet water inlet pipe assembly includes a plastic water pipe, a first plastic joint, first sealing rings, a second plastic joint, second sealing rings and a metal nut. The first plastic joint is connected to an end of the plastic water pipe, the second plastic joint is connected to another end of the plastic water pipe, and an end of the metal nut is sleeved outside the second plastic joint. The faucet water inlet pipe assembly has advantages of low overall material cost, no lead and no harm, and good sealing performance.