Device for monitoring the coal flow through a line

Device for monitoring the coal flow through a line (16 in Fig. 1) from a coal bunker (12) to a feeder (18). A detector (32) sensitive to radiation determines the amount of coal present in a line section (16) and produces an impulse sequence which is scanned to determine whether the line section (16)...

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Bibliographische Detailangaben
Hauptverfasser:	FAIRCHILD,ARTHUR, W. LAPLANTE,DONALD, L. REBUCCI,EUGENE
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	CHEMISTRY CONVEYING CRUSHING, PULVERISING, OR DISINTEGRATING CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL HANDLING THIN OR FILAMENTARY MATERIAL INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT MANUFACTURE OF IRON OR STEEL MEASURING MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION,OR SHOCK METALLURGY METALLURGY OF IRON MILLING GRAIN PACKING PERFORMING OPERATIONS PHYSICS PNEUMATIC TUBE CONVEYORS PREPARATORY TREATMENT OF GRAIN FOR MILLING SHOP CONVEYOR SYSTEMS STORING TESTING TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING ORTIPPING TRANSPORTING
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Beschreibung
Zusammenfassung:	Device for monitoring the coal flow through a line (16 in Fig. 1) from a coal bunker (12) to a feeder (18). A detector (32) sensitive to radiation determines the amount of coal present in a line section (16) and produces an impulse sequence which is scanned to determine whether the line section (16) is empty, partly filled or completely filled. If the line section (16) is partly filled, a partial-flow alarm is produced. If the line section (16) is empty, an empty alarm is produced and the feeder (18) is stopped after a predetermined quantity of coal has been deposited on the feeder (18). If the line section (16) is partly filled and a shut-off valve (14) between the coal bunker (12) and the line (16) is closed, a coal-accumulation alarm is produced. If the line section (16) is filled and the coal profile on the feeder (18) does not correspond to the full profile, a coal-blockade alarm is produced. If the line section (16) is partly filled and the coal profile on the feeder (18) corresponds to the full profile, a ventilation alarm is produced. A self-test switching circuit periodically simulates each of these states for checking the device.