A super-large caliber piston type regulating valve

By real-time detection and calculation of cavitation risk, and by constructing a pressure buffer step using a sliding sleeve, the cavitation problem of ultra-large diameter piston-type regulating valves under high pressure differential and small opening conditions is solved. It also ensures a safe response in the event of sensor failure, achieving a balance between flow efficiency and stability.

CN122281065APending Publication Date: 2026-06-26WUZHOU VALVE
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Patent Information

Application Number
CN202610696487.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-20
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing ultra-large diameter piston-type control valves are prone to severe cavitation under high pressure differential and small opening adjustment conditions, leading to structural cavitation damage and perforation. Furthermore, sensor failure may cause control errors under extreme conditions.

Method used

The detection module collects the crank rotation angle and upstream and downstream pressure values ​​in real time. The control module calculates the cavitation risk coefficient and drives the sliding sleeve to move, constructing a pressure buffer step. Combined with the feedforward control mechanism and safety protection mode, the system can suppress cavitation and maintain reliability under high pressure differential conditions.

Benefits of technology

It effectively suppresses the generation of cavitation bubbles, improves flow efficiency and system stability, ensures safe response in the event of sensor failure under extreme operating conditions, and enhances the reliability of valves in critical infrastructure.

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Abstract

This invention provides an ultra-large diameter piston-type regulating valve, belonging to the field of regulating valve technology. It includes a valve body, regulating chamber, and piston valve core, as well as a detection module, a control module, and an actuator. The invention uses the detection module to collect real-time data on the crank rotation angle θ, upstream pressure P1, and downstream pressure P2. The control module then performs logical judgment based on a preset first angular displacement warning point R. When the crank rotation angle θ is less than or equal to the first angular displacement warning point R, the system automatically enters a dynamic anti-cavitation mode, driving the second regulating component to precisely move the sliding sleeve axially, constructing an adjustable pressure buffer step in the flow channel. This actively raises the static pressure at the narrowest flow section, fundamentally suppressing the generation of cavitation bubbles. This invention solves the problem of cavitation damage to ultra-large diameter piston valves under high pressure differential and small opening conditions, achieving intelligent switching and balance between cavitation suppression and flow efficiency.
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Citation Information

Patent Citations

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