Valve Seat Ceramic Material for High-Pressure Cleaning
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Solution Overview
Problem
High-pressure and high-temperature cleaning liquids in valve devices for high-pressure cleaning devices subject valve seat and closing body to extreme mechanical and thermal stresses, leading to reduced service life due to high loads and abrasive particles, and existing solutions like elastic sealing elements are costly and not durable enough.
Innovation Solution
The valve device uses a valve seat and closing body made of high-purity aluminum oxide ceramic or ZTA (Zirconia Toughened Aluminum Oxide) ceramics, with a conical sealing surface and flow guide surface design, to withstand high pressures and temperatures without additional elastic materials, enhancing durability and reducing assembly costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If elastic sealing elements are used for the valve seat, then abrasion resistance is improved, but assembly costs increase and durability under high stress deteriorates
Solution Approach 1:
The patent changes the material parameter from elastic sealing elements to ceramic materials (aluminum oxide with ≥99.8% purity or ZTA dispersion ceramic), which fundamentally alters the properties: ceramic provides equivalent or superior abrasion resistance without the cost and durability issues of elastic materials under high-temperature, high-stress conditions
Solution Approach 2:
The patent employs composite ceramic materials - specifically aluminum oxide ceramic with at least 99.8% purity or dispersion ceramic combining aluminum oxide with dispersed zirconium oxide - to achieve optimal balance between hardness, impact strength, and resistance to abrasive particles while withstanding high mechanical and thermal stresses
2Reliability
If ceramic materials are used for valve seat and closing element, then durability under high stress is improved, but manufacturing complexity increases due to high purity requirements
Solution Approach 1:
The patent specifies precise material parameters (aluminum oxide purity ≥99.8% or ZTA dispersion ceramic) that balance manufacturing feasibility with performance requirements, ensuring the ceramic materials can be produced with controlled complexity while achieving the necessary durability
Solution Approach 2:
The patent applies ceramic material specifically to the valve seat area and closing element contact surfaces where high stress and abrasion occur, rather than requiring the entire valve device to be made of ceramic, thus localizing the high-purity material requirement to only the critical wear zones
3Reliability
If high-purity aluminum oxide ceramic or ZTA ceramic is used, then resistance to high-pressure and high-temperature cleaning fluid is improved, but material cost increases
Solution Approach 1:
The patent selects ceramic material purity and composition parameters (≥99.8% aluminum oxide or ZTA dispersion ceramic) that provide the minimum necessary performance threshold for withstanding high-pressure, high-temperature cleaning fluid, avoiding excessive material specifications that would unnecessarily increase cost
Data Source
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AI summary
The invention relates to a valve device (22) with a valve housing (24) which has a passage channel (30) in which a valve seat element (108) is arranged, said valve seat element forming a valve seat (110), and in which a closing element (122) is arranged that is acted upon by a closing force in the direction of the valve seat (110) by means of a closing spring (124), sealingly lies against the valve seat (110) in a closed position, and can be moved into an open position at a distance from the valve seat (110) by moving a valve tappet (132). The aim of the invention is to develop the valve device (22) such that the valve device has an improved service time even when using a highly heated and highly pressurized cleaning fluid. This is achieved in that at least one valve seat region of the valve seat element (108), said region forming the valve seat (110), consists of an aluminum oxide ceramic with a degree of purity of at least 99.8% or consists of a dispersion ceramic based on aluminum oxide with dispersed zirconium oxide. Furthermore, the invention relates to a valve gun (10) comprising such a valve device (22).