ROD PUMP SUCTION VALVE Russian patent published in 2022 - IPC F16K1/12 F16K39/02 F16K15/06 

FIELD: hydraulic engineering.

SUBSTANCE: invention relates to hydraulic engineering and, in particular, to deep rod pumps for oil production. The damper consists of a body, in the axial channel of which a perforated partition is installed. In the lower part of the body, a narrowing is made and a seat is installed, pressed with a nut. The cylindrical bushing has a stepped bore, in which a stepped annular piston is installed with a hollow stem connected to the poppet valve, in which an internal bore is made, connected by a hole with the axial channel of the body under the poppet valve and the axial channel in the hollow rod, with a cavity above the stepped annular piston. The cavity under the stepped annular piston is blocked by a guide and is constantly connected by a hole with the axial channel of the housing. The bore above the upper end of the stepped annular piston is covered by a union nut mounted on the upper end of the cylindrical sleeve. The union nut is provided with a hole for connection with the axial channel of the housing.

EFFECT: ensuring optimal contact stresses when seating a poppet valve on the seat, reducing hydraulic resistance when supplying reservoir fluid through the valve in suction mode.

1 cl, 2 dwg