Low temperature top entry fixed ball valve

By designing a cryogenic top-mounted fixed ball valve and adopting a valve seat elastic sealing structure with bidirectional sealing and dynamic gap compensation, the problems of medium leakage and internal leakage in traditional cryogenic valves under extremely low temperature environments are solved, achieving safe and reliable medium control.

CN224533526UActive Publication Date: 2026-07-21SHANGHAI KAIKE VALVE MFG
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SHANGHAI KAIKE VALVE MFG
Filing Date
2025-08-08
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Traditional cryogenic valves, in environments ranging from -40℃ to -196℃, experience increased gaps between the valve body and the flange sealing surface in the valve cover due to thermal expansion and contraction, leading to media leakage. Furthermore, the increased brittleness of the material causes traditional soft seals to deform easily with cold flow, resulting in insufficient sealing pressure between the valve seat and the ball, and frequent internal leakage.

Method used

The valve adopts a cryogenic top-mounted fixed ball valve design, which includes a valve body, valve seat, valve cover, ball, valve stem, valve stem sealing structure and valve seat elastic sealing structure, forming a bidirectional seal, dynamically compensating for gaps, and preventing leakage.

Benefits of technology

It effectively prevents media leakage, ensures system safety, reduces wear, extends valve service life, and improves sealing performance and stability.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN224533526U_ABST
    Figure CN224533526U_ABST
Patent Text Reader

Abstract

The embodiment of the utility model relates to a low temperature upper-mounted fixed ball valve, the valve body is arranged below the low temperature upper-mounted fixed ball valve, the first valve seat is arranged below the valve body, the second valve seat is arranged below the valve body, the valve cover is fixed above the valve body, the ball body is arranged on the valve body, the valve rod is connected above the ball body, the middle way sealing structure is arranged between the valve body and the valve cover, the valve rod sealing structure is arranged on the preset axis of the valve rod, the valve seat elastic sealing structure is arranged between the valve body and the first valve seat and the second valve seat, the valve seat elastic sealing structure can form bidirectional sealing, dynamically compensate the gap, avoid leakage, solve the technical problem that in the prior art, under the low temperature working condition, the material brittleness increases, the traditional soft sealing is prone to cold flow deformation, leading to the insufficient sealing specific pressure of the valve seat and the ball body, and the frequent internal leakage problem.
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