RECIPROCATING PUMP Russian patent published in 2019 - IPC F04B5/02 F04B53/16 F04B53/14 F04B9/111 

FIELD: engines and pumps.

SUBSTANCE: invention relates to pump engineering, particularly, to reciprocating pumps for pumping liquids. Pump 10 comprises first vertical riser 12, second vertical riser 14, first bypass pipeline 16, second bypass pipeline 18, lower valve assembly 20 and upper drive assembly 22. Drive assembly includes plungers 30, which have alternating directed downward pump forces on liquid columns in risers 12, 14. Valve assembly is located in reservoir 55 with water and includes suction holes 60, 64, which are in water, which lead to bypass pipelines 16 and 18 respectively. Valve unit includes system of valves and pistons 74, 76 for control of water flow in risers 12, 14 through bypass pipelines 12, 14 at alternating action of pump forces on water columns in risers 12, 14. Water in the risers is lifted and lowered in an alternating pendulum manner. Water soaks into and is alternately directed via bypass pipelines into risers, where water is pushed out of upper ends of risers 12, 14 through slots 31 formed in plungers.

EFFECT: there is energy saving.

8 cl, 9 dwg