Balanced spool and three-way control valve

By adopting a balanced valve core design in the three-way control valve, utilizing the through-type balanced channel and concave flow groove, combined with the rotatable turbulence ring and sealing ring structure, the problem of unstable flow caused by unbalanced force under high pressure environment is solved, and the stability of fluid control and sealing reliability are achieved.

CN122148774APending Publication Date: 2026-06-05SHANGHAI YIHE VALVE CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI YIHE VALVE CO LTD
Filing Date
2025-08-12
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Traditional three-way control valves experience large unbalanced forces under high pressure, resulting in unstable flow control and affecting control accuracy.

Method used

The valve core adopts a balanced design, including a through-type balanced channel and an inner concave flow groove. Combined with multiple rotatable turbulence rings and peripheral inlet ports, the flow resistance is adjusted by rotating the turbulence rings. Combined with the sealing ring and isolation ring structure, fluid pressure balance and dynamic sealing are achieved.

Benefits of technology

It effectively balances the pressure difference at both ends of the valve core, reduces fluid pressure fluctuations, improves system stability and flow control stability, and ensures sealing reliability and fluid control accuracy under high-pressure conditions.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application relates to the technical field of control valves, and discloses a balanced valve core and a three-way control valve. The balanced valve core comprises a valve core body, a balance channel is arranged through the valve core body, the valve core body comprises a sealing part, a flow-through part and a plug which are sequentially connected, the diameter size of the flow-through part is smaller than that of the sealing part and the plug, and the flow-through part forms an inner concave flow-through groove, a plurality of turbulence rings are rotationally connected to the flow-through part, and a plurality of liquid delivery openings are arranged on the circumferential side of the turbulence ring. The application balances the pressure difference before and after the valve core body through the balance channel, the turbulence rings automatically rotate with the fluid flow, fluid disturbance mixing can be realized, the fluid momentum impact force when confluence or distribution is reduced, and thus the unbalanced force of the valve core dynamic is reduced.
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