METHOD OF DOSED SUPPLY OF LIQUID AND DEVICE FOR ITS EMBODIMENT Russian patent published in 2000 - IPC

FIELD: methods of automatic control, particularly, systems of liquid dosed supply. SUBSTANCE: method of dosed supply of liquid from reservoir consists in that measuring vessel is used which periodically filled with liquid from reservoir and emptied into main line of liquid user. Filling of measuring vessel from reservoir and vessels emptying into main line of liquid user is accomplished by generation of gas pressure pulses in upper point of measuring vessel due to supercharge of its pad from source of high-pressure gas, and drainage of this pad into receiver of low-pressure gas. The device of method embodiment includes reservoir with liquid, measuring vessel connected with lower part of reservoir and user main line connected with measuring vessel. Upper point of measuring vessel is located below the lower point of reservoir with liquid. User main line is connected with lower point of measuring vessel. Connected with upper point of measuring vessel is balance pipe whose upper point is located higher than upper point of liquid reservoir and is connected through hydraulic resistor with upper point of liquid reservoir. Compressed gas source is connected with balance pipe upper point through electrical valve. Connected with upper point of liquid reservoir is user gas pipeline with which user main line is connected. User main line has section whose upper point is located above upper point of liquid reservoir. Measuring vessel upper points is connected with liquid reservoir through additional vessel and hydraulic resistor. User gas pipeline is provided with system for measuring gas flow rate in it. The system is connected via control system with electrical valve drive. EFFECT: extended range of method application due to simplification and lower cost price of device for method embodiment. 2 cl, 4 dwg