| 摘要 |
<p>A control mechanism ( 20; 70 ) and a method for use in an installation for transporting bulk material, granular material or powdery material through a conveyor line ( 1 ) with the aid of a pressurized gaseous medium. The control mechanism ( 20; 70 ) is arranged for being connected to the conveyor line ( 1 ) for the purpose of introducing a pressurized gaseous medium ( 15 ) therein and comprises a connecting opening ( 24 ) for connecting the control mechanism ( 20; 70 ) to an inlet ( 25 ) in the conveyor line ( 1 ), an intake ( 26 ) for gaseous medium ( 15 ), which is in communication with the connecting opening ( 24 ), valve means ( 28; 71 ), which operatively engage the intake ( 26 ), and means ( 31, 32, 35, 50, 51; 32 ) for controlling the valve means ( 28; 71 ) associated with the pressure of the gaseous medium in the conveyor line ( 1 ). The control mechanism ( 20; 70 ) is arranged for directly controlling the control valve ( 28; 71 ) in response to the sensed pressure in the conveyor line ( 1 ) for the purpose of metering the pressurized gaseous medium ( 15 ) that is being delivered thereto.</p> |
