| 摘要 |
FIELD: technology determining physical properties of solid and loose materials. SUBSTANCE: device includes electric stopwatch, measuring press with microswitch and electric motor drive, pressure regulator which outlet is connected to core holder with tested sample, two vessels, one being manufactured in the form of double-action press with unloaded piston which inlet outlet windows intercommunicated through shutting valve and are joined to inlet of pressure regulator and pressure source, the second one communicates with first one through equalizing valve and is connected to measuring press. Two chambers separated by restoring element carrying null detector controlling operation of electric motor are connected to working chamber of double-action press and to second vessel. Electric stopwatch switches on with shutting of equalizing and shutting valves and stops by signal from microswitch at the end of stroke of piston of measuring press. Range of measured flow rates is determined by relation of working volumes double-action press and second vessel and desired flow rate is measured by time of full stroke of piston of measuring press with given relation of volumes of working chamber and vessel. EFFECT: device has linear characteristics, makes possible to increase accuracy of measurement of gas flow rates and to expand range of measured flow rates thanks to smooth control over working volume of vessel connected to pressure regulator. |
