Conveyors: fluid current – With means to control conveying fluid or movement of load in... – Control of conveying fluid
Patent
1985-10-17
1988-07-19
Barefoot, Galen
Conveyors: fluid current
With means to control conveying fluid or movement of load in...
Control of conveying fluid
406 12, 406 24, 406 93, 406123, B65G 5366
Patent
active
047581174
ABSTRACT:
The invention provides an efficient method for controlling the flow rate of a particulate material through a pneumatic transportation pipe at a preset value with a high accuracy and rapid response to an external disturbance added to the system by controlling the flow rate of the booster gas. Different from conventional methods in which the flow rate of the booster gas is controlled with the feedforward factor of the variation in the actual flow rate of the particulate material, the inventive method utilizes the variation in the pressure in the receiving unit as the feedback to control the flow rate of the booster gas so that the above mentioned advantages are obtained in the accuracy of control and rapidness of the response to an external disturbance.
REFERENCES:
patent: 4368678 (1983-01-01), Ulveling
patent: 4482275 (1984-11-01), Shinozaki et al.
patent: 4483646 (1984-11-01), Moriyama
patent: 4529336 (1985-07-01), Shinozaki et al.
Kobayashi Minoru
Kobayashi Yuichi
Maki Yunosuke
Ooishi Hideo
Sakaguchi Yasuhiko
Barefoot Galen
Denka Consultant & Engineering Co., Ltd.
Kawasaki Steel Corp.
Salmon Paul E.
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