| 摘要 |
Apparatus for pneumatically conveying bulk material, includes a conveying agent secondary conduit (5) disposed parallel to a conveyor conduit (1) and communicating with the conveyor conduit (1) via controllable valves (V1 to V4) along the conveying path, and pressure sensors (S1 to S5) arranged at spacings on the conveyor conduit for controlling said valves. The sensors (S1 to S5) are in the form of electrical pressure transmitters connected by lines (10) to an electronic control unit (11) which produces a logic combination of the output signals of the pressure transmitters with parameters such as pressures, pressure differences, intervals of time and frequencies, which characterise the conveying condition and which are inputted as reference values. The unit (11) in the event of the actual conveying condition deviating from the reference conveying condition, electrically actuates the controllable valves (V1 to V4) by way of further lines (12). An electrical gas flow rate meter which is connected to the control unit (11) can additionally be provided in the apparatus. <IMAGE> |
