| 摘要 |
<p>A new system for overcoming particle-flow deficiencies is readily applicable to most conventional feed grinding and mixing machines now in use by addition and connection of a minimal number of components. Said grinder mixers employ, in addition to the feed mixing mechanism and tank, a grinder, such as a hammermill, having its bottom discharge transport-connected to the lower portion of the feed mixing tank, usually by means of an enclosed screw conveyor. Said combination machines also employ an upstanding dust collector interspersed between the grinder and the screw conveyor and equipped with a power fan to remove the finer comminuted particles and dust from the interior of the grinder and to collect and communicate the same to an intermediate portion of the screw conveyor and into the stream of the larger ground particles. The screw conveyor builds up pressure throughout its length with the result that upward air pressure is applied at the communication point with the depending discharge of the dust collector, producing upward blowout and often clogging. Also, in present machines back pressure is created at the extreme discharge of the screw conveyor into the tank. The new system applies a predetermined degree of suction to the pressure build up area near or at the discharge tube of the dust collector, thereby relieving the accumulated pressure in said conveyor at the point of connection with the dust collector and also at the ultimate discharge of the conveyor into the bottom portion of the mixing tank.</p> |
