Piston regulating valve with double sleeve throttle

Abstract

The application discloses a piston type regulating valve with double-layer sleeve type throttling components, which comprises a valve body, a valve seat, a piston, a driving mechanism and a throttling component, wherein the throttling component comprises an outer sleeve and an inner sleeve which are coaxially sleeved; a plurality of first throttling grooves are distributed on the sleeve wall of the outer sleeve in the axial direction; a plurality of annular protrusions and a plurality of annular grooves are alternately distributed on the outer circumferential surface of the inner sleeve in the axial direction; the outer circular surface of the annular protrusion is tightly combined with the inner wall surface of the outer sleeve; and a second throttling groove is arranged on the groove bottom of each annular groove. Each first throttling groove is communicated with the corresponding annular groove, thereby forming a fluid channel which enters the inner sleeve from the outside of the outer sleeve through the first throttling groove, the annular groove and the second throttling groove, and the adjacent annular grooves are isolated by the annular protrusion. The application realizes two-stage pressure reduction and energy dissipation through the double-layer sleeve, effectively inhibits the cavitation phenomenon, and improves the stability, reliability and regulating characteristics of the piston type regulating valve under the high pressure difference working condition.

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