METHOD OF PUMPING MULTIPHASE LIQUID COMPOSITIONS WITH NORMAL PRESSURE Russian patent published in 2006 - IPC F04B43/00 

FIELD: mechanical engineering.

SUBSTANCE: invention relates to diaphragm hydraulically driven metering pumps and it can be used in different industries for metered delivery of aggressive, toxic, fire and explosion-hazard and other contaminated liquid and gaseous media. According to proposed method, liquid is fed into pump space through neck of housing. Pump space is limited by diagram installed in drive part of pump, diaphragm installed in pump working chamber and diaphragm of receiver, intercoupled inner surfaces of housing, adapter cylinder coupled with receiver divided by perforation grid and diaphragm of receiver lock unit. Housing of receiver is divided into air medium and water medium by means of shut off cocks installed on pipelines. Normal pressure in water and air media is created to provide support pressure on receiver diaphragm. Pusher shifts rod with delivery motions Ds which act onto diaphragm installed in drive part of pump. Boundary zones of its sagging are formed. Pressure built in liquid is conveyed to diaphragm installed in working chamber of pump which is used to from boundary zones of its sagging. Vacuum in chamber is built from boundary zones. Liquids containing multiphase compositions is fed into chamber through valve. Rod, by its reverse motion, acts onto diaphragm installed in drive part of pump. Liquid is fed through perforated guard and shifts diaphragm installed in pump working space to boundary zone. Valve lets out liquid from pump space. With valve closed, rod acts onto diaphragm installed in drive part of pump which is used to built pressure in liquid passing through perforated grid and acting onto diaphragm of receiver which is shifted to boundary of sagging. This provides idle stroke of rod with pusher. Valve provides movement of diaphragm installed in working chamber of pump to zone of chord and to boundary zone of pump.

EFFECT: increased normal pressure of handled liquid or gas, increased service life of pump owing to use of reinforced diaphragms, cut down cost of assembling.

1 dwg