GEAR FOR UNINTERRUPTED PRESSURE FEED OF LIQUID FROM ACCUMULATING VESSELS Russian patent published in 2002 - IPC

FIELD: chemical, cryogenic, gas and other branches of industry where liquids and gases under pressure are used. SUBSTANCE: gear is related to equipment designed to feed and transfer liquids. It has two accumulating vessels balanced on arms of rocking lever swinging on axle anchored in immobile support. Rocking lever interacts in extreme positions with rests and locking arms. For change of operational condition gear is fitted with two flow governors, non-return valves and valves with mechanical drive set in motion by rocking lever. Accumulating vessels are equipped with heat insulation to issue compressed gas to user for gasification of cryogenic liquid and cryogenic evaporator is set across outlet from gear. Working liquid is fed to inlet of gear under excessive pressure. Source of compressed air is employed to pressurize vessels. In process of filling of one accumulating vessel liquid in second vessel is forced to user by pressure of compressed air. In this case rocking lever is held in extreme position by licking arm. On completion of filling and discharge of vessels arm allows rocking lever to incline to opposite extreme position where it is again fixed temporarily. Flow governors equalize rates of filling and discharge of accumulating vessels. In variant with use of cryogenic evaporator the latter is employed to pressurize accumulating vessels from which liquid flows by gravity. Thus, attachment of accumulating vessels on ends of rocking lever makes it possible to raise functional reliability of gear and to simplify its design as compared with prototype as there is no sealing box of rods placed in necks of accumulating vessels and floats. Besides that gear provides for automatic control over conditions of discharge of working liquid to user from one vessel and filling of second vessel with liquid when condition of consumption of working fluid changes. EFFECT: raised functional reliability and simplified design of gear. 6 cl, 3 dwg