HYDRAULIC PLUNGER PUMP Russian patent published in 2000 - IPC

FIELD: hydraulic plunger pumps. SUBSTANCE: pump includes feed water pipe line admitting feed water to inlet pipe, delivery pipe line communicated with water delivered through bottom valve, plunger pump valve connected to feed water pipe line and delivery pipe line; feed water flows to delivery pipe line when plunger pump valve is open. After closing of plunger pump valve, water flow is admitted to delivery pipe line sucking water through bottom valve; plunger pump valve is kept in closed position by force of spring separating the feed water pipe line from delivery pipe line. Pump is also provided with pressure reservoir which is connected with feed water pipe line above in way of flow relative to plunger pump valve. Valve has circular body which is movable in axial direction and is tightly connected with delivery pipe line; effective cross section of this joint exceeds cross section of valve seat; seat of plunger pump valve and seat of bottom valve are mechanically linked for conversion of kinetic energy. EFFECT: compactness of plunger pump at high output and increased service life. 9 cl, 1 dwg