PLUNGER-TYPE METERING DEVICE Russian patent published in 2007 - IPC F04B13/00 

FIELD: gas, chemical, power engineering and other industries.

SUBSTANCE: invention is designed for metering out liquid media. Proposed device has hydraulic part of metering pump consisting of two-stage housing with two working chambers with suction and delivery valves in each chamber, and two-step plunger with seals, drive, reservoir with liquid to be metered out connected by output with input of first working chamber of two-stage housing. Follow-up device has output to reservoir with liquid to be metered out, and pulsation suppressor. One input of follow-up device is connected with output of first working chamber, pulsation suppressor and with input of second working chamber of two stage housing. Other input of follow-up device and output of second working chamber of two-stage housing are coupled by impulse line. Two-step plunger has diameters of steps differing by small value. Follow-up device is connected by impulse line with delivery line connecting output of second working chamber with consumer.

EFFECT: improved accuracy of metering out, provision of issuing of small doses at any delivery pressures.

1 dwg