A ceramic core sealed three-way valve

By combining metal powder metallurgy with high-purity alumina ceramic sheets, the valve body defects and sealing problems of existing three-way valves have been solved, resulting in a compact and reliable three-way valve structure that improves pressure resistance and sealing performance.

CN122305255APending Publication Date: 2026-06-30XIAMEN HONGZHANG TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XIAMEN HONGZHANG TECH CO LTD
Filing Date
2026-05-27
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing three-way valves suffer from internal defects in the valve body, leakage problems caused by easy aging or corrosion of the seals, and complicated component assembly, making it difficult to balance molding precision, structural strength and long-term sealing performance.

Method used

The valve body is integrally formed using metal powder metallurgy technology, combined with high-purity alumina ceramic sheets and a multi-seal ring design. The snap-fit ​​structure enables fixation without external tightening nuts, ensuring precise alignment of the flow channel and reliable sealing.

Benefits of technology

It simplifies the assembly process, improves the valve's pressure resistance and sealing reliability, avoids media cross-flow and leakage, and ensures the accuracy and smoothness of flow channel switching.

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Abstract

This application relates to the field of valve manufacturing technology and discloses a ceramic valve core sealed three-way valve, including a valve body integrally formed by powder metallurgy, a valve core assembly and a drive assembly disposed in the valve core mounting cavity. The inner wall or opening edge of the valve body has a first snap-fit ​​portion. The valve core assembly includes a static ceramic plate, a moving ceramic plate, and a valve core positioning sleeve covering both, stacked from bottom to top. The outer wall of the valve core positioning sleeve has a second snap-fit ​​portion that engages with the first snap-fit ​​portion, enabling rapid assembly and fixation without the need for an external tightening nut. The rotating shaft in the drive assembly passes through the valve core positioning sleeve and is inserted and linked with the moving ceramic plate. This invention eliminates the casting defects of traditional valve bodies through powder metallurgy, and the snap-fit ​​structure significantly improves assembly efficiency. Combined with a high-precision ceramic sealing pair and multiple soft sealing defenses, it completely solves the technical problems of cumbersome assembly and easy aging and leakage in traditional valves, and has the advantages of high forming accuracy, compact structure, and long-term leak prevention.
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