| 摘要 |
PURPOSE:To aim at the quantitative feed of granular body and their backflow prevention, by installing a screw feeder of a hollow shaft in a transport pipe at a hopper lower end, and having pressure air passing the hollow shaft jetted to a transport pipe diffuser part in front of the screw feeder. CONSTITUTION:A transport pipe 2 is connectedly installed in the lower part of a granular body storage hopper 1, and a screw feeder 4 is installed in this pipe. A shaft of the screw feeder 4 is formed into hollowness, and rotatably attached to a closing plate 3 at an end part of the transport pipe. A nozzle part 6 is formed in a tip of the hollow shaft, and in front of that, a diffuser part 7 is formed in the transport pipe 2. With this constitution, granules inside the hopper are quantitatively fed to the inside of the transport pipe by the screw feeder and what is more, the granular body is prevented from flowing back owing to jet from the nozzle for pressure air and negative pressure by an ejector action with the diffuser part.
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