VACUUM PUMP STATION Russian patent published in 1997 - IPC

FIELD: steel making and converter plants for degassing steel. SUBSTANCE: vacuum pump station includes three independent water and vacuum maintaining reservoirs and hydraulic pump mounted below reservoirs by size of column of barometric pressure of liquid used in operation of station. Liquid contained in one reservoir is transferred to free reservoir by means of gas and water delivery pipe lines, cut-off valves, vacuum control instruments and one hydraulic pump, thus forming vacuum of zero state in reservoir being emptied. Vacuum of such state is formed due to shape of reservoirs provided with radially rounded inner surfaces coated with form-making envelope; area of half-chamber made from flexible metallized and gas-and watertight fabric secured in side walls; watertight envelope is movable to either half of chamber. Vacuum pump station may operate in automatic mode according to magnitude of vacuum shown by vacuum meter through change-over of cut-off valves by electric signal received from vacuum meters. EFFECT: enhanced reliability. 1 dwg