A sealing structure of a large-diameter high-flow ball valve

CN224397294UActive Publication Date: 2026-06-23JIANGSU AOWEI MASCH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
JIANGSU AOWEI MASCH CO LTD
Filing Date
2025-06-19
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

The stem and body sealing structure of existing large-diameter, high-flow-rate ball valves is prone to failure under high pressure and high flow rate conditions, leading to media leakage, resource waste, environmental pollution, and safety hazards.

Method used

It adopts a combination structure of a sleeve and annular rubber block made of high-strength material. The sleeve has a liquid injection chamber inside. By injecting liquid, the rubber block expands and fits tightly against the valve stem. Combined with a rotating support component and a self-lubricating coating, it can achieve adaptive compensation for valve stem offset and disperse stress.

Benefits of technology

It improves sealing reliability and structural stability, reduces wear and deformation of rubber blocks, extends service life, adapts to complex industrial environments, and reduces the risk of media leakage.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a kind of sealing structure of large-diameter high flow capacity ball valve, involve ball valve field, its technical scheme main point is: sealing structure is used to seal between the valve body and valve stem of ball valve, including sleeve made of high-strength material and connected with valve body, the inside of the sleeve is provided with annular rubber block for valve stem to pass through, the inside of the annular rubber block is provided with injection cavity, when sufficient liquid is injected into the injection cavity of annular rubber block, annular rubber block is lifted, its inner side wall is in contact with the outer side wall of valve stem, effect is to realize sealing function by the innovative combination of "sleeve+injection type annular rubber block", when working, sleeve made of high-strength material is stably connected with valve body, provides rigid support for entire sealing structure, avoids structural deformation due to medium high pressure, even elastic failure.
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