Apparatus for conveying bulk material with vacuum-responsive controlled introduction of a conveying gas
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United States of America Patent
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-
Jul 8, 2003
Grant Date -
May 23, 2002
app pub date -
Aug 13, 2001
filing date -
Aug 12, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus for conveying bulk material in which a variable amount of a conveying gas may be introduced to the bulk material to be conveyed by a negative pressure of a vacuum conveying system. In a conveying line (4) for the bulk material being transported by the vacuum conveying system while adding the conveying gas, the negative pressure is measured by a pressure sensor (7), and a corresponding control signal is output. In a conveying gas inlet (3) of the vacuum conveying system, a valve (9) is installed whose opening for the flowing conveying gas is controlled by a controller (8) as a function of the magnitude of the negative pressure within the conveying line (4).
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