Ball valve core with flow rate regulating function

Abstract

The invention relates to a ball valve core with a flow rate regulating function. The ball valve core comprises a spherical valve core body and one or more throttle orifice plates, wherein the valve core body is made of a whole piece of Stellite3; the hardness of the valve core body is higher than HRC 60; a valve rod connector is arranged at the top end of the valve core body; a circular medium through hole is formed in the middle of the valve core body; a spherical regulator pair provided with a plurality of small orifices is arranged on one side of the circular medium through hole; and the throttle orifice plates are arranged in the circular medium through hole. By adoption of the ball valve core provided by the invention, the defect that in the prior art, a valve core for a common ball valve and a V-shaped valve core for a ball valve are low in regulating precision, easy to erode and damage under the working condition of high differential pressure, and short in service life can be overcome; through the design that the ball valve core is equipped with spherical regulator pair and the throttle orifice plates as well as the spherical regulator pair is provided with the small throttle orifices, the flow rate of a medium can be highly precisely regulated and controlled in the rotation starting or stopping process of the valve core body, and the ball valve core is particularly applicable to the working condition of high differential pressure; the valve core body is made of a whole piece of Stellite3, so that the high hardness can be achieved and the abrasion resistance can be improved; and the ball valve core has the advantages of being simple in structure, high in regulating precision, long in service life and high in reliability.

Description

technical field [0001] The invention relates to a flow-adjustable ball valve core, which is used for ball valves in thermal power, nuclear power and petrochemical fields. Background technique [0002] The existing spools for ball valves with adjustable flow are "V"-shaped spools or circular through-hole spools. The circular through-hole spools can achieve the purpose of regulating flow during the switching process, but the adjustment accuracy is low. "V" The shaped spool has high adjustment accuracy for liquid media, but the adjustment effect for steam media is not ideal, especially in the case of high-pressure differential media, which is prone to erosion. The spools used in ball valves are mostly surface-hardened by spraying and nitriding processes. The spools are easily damaged during rotation and have a short service life. Contents of the invention [0003] The invention provides a valve core for a ball valve with adjustable flow, which has multi-stage adjustment and ...

AI Technical Summary

Problems solved by technology

[0002] The existing spools for ball valves with adjustable flow are "V"-shaped spools or circular through-hole spools. The circular through-hole spools can achieve the purpose of regulating flow during the switching process, but the adjustment accuracy is low. "V" The shaped spool has high adjustment accuracy for liquid media, but the adjustment effect for steam media is not ideal, especially in the case of high-pressure differential media, which is prone to erosion

The spools used in ball valves are mostly surface-hardened by spraying and nitriding processes. The spools are easily damaged during rotation and have a short service life.

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