Pneumatic conveyor for tunnel packing - uses bunker gate seals which operate when no material is flowing

The pneumatic conveying system is used where continuous flow is required, e.g. in tunnels where packing or stopping material has to be supplied fast and continuously over lengthy periods to ensure successful packing or sealing. The seals (5) at the top and bottom of the filling bunker are switched i...

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Bibliographic Details
Main Authors HOELTER,HEINZ, IGELBUESCHER,HEINRICH
Format Patent
LanguageEnglish
German
Published 14.07.1977
Edition2
Subjects
CONVEYING
EARTH DRILLING
FIXED CONSTRUCTIONS
HANDLING THIN OR FILAMENTARY MATERIAL
MINING
PACKING
PERFORMING OPERATIONS
PNEUMATIC TUBE CONVEYORS
SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, ORDRAINING IN OR OF MINES OR TUNNELS
SHOP CONVEYOR SYSTEMS
STORING
TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING ORTIPPING
TRANSPORTING
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Summary:The pneumatic conveying system is used where continuous flow is required, e.g. in tunnels where packing or stopping material has to be supplied fast and continuously over lengthy periods to ensure successful packing or sealing. The seals (5) at the top and bottom of the filling bunker are switched in a sequence, which ensures that they always operate when no material is in flow and thus are not exposed to wear. The switching sequence starts with the top gate open, and the filling screw feeds material into the bunker until the level gauge signals full. The screw is halted, the gate closed and the control valve opened. This operates the bottom gate seal (5) and the screw feeder (6) to fill the surge or buffer bunker (7), and thence via screw (8) into the blow-line (9). Compressed air is supplied (10) when the feeder screw (8) starts, and the bunker is emptied down to the lower gauge (4).
Bibliography:Application Number: DE19752558860