| 摘要 |
The invention relates to apparatus for extracting a substance stored in the divided state in a silo and for metering out the powder or granular substance by volume. The apparatus comprises de-bridging means inside a converging bottom portion of the silo; a decompression enclosure disposed at the bottom of the silo and having a diameter greater than the diameter of the end section of the converging portion of the silo; and a drive assembly for driving the substance along a direction substantially perpendicular to the axis of the silo and in communication with the bottom end of the decompression enclosure, together with means for keeping the drive assembly loaded so long as the divided substance is flowing, which means are disposed in the zone where the decompression enclosure opens out into the drive means.
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