| 摘要 |
A mobile storage wagon distributing a controled flow of dry cement. A hopper is provided with a roof (28) over a bin (26) discharging cement into a foldable screw housing (32) to a mixer. The hopper is mounted on legs (30) over a trailer (34). The bin at its lower end has a pair of sealing U gates (76) as guillotines which lead into a feeding chamber (56) with an exit, into the screw housing. The U gate has a long flat web (80) and two upward wings (78) which slide in slit square tubes (62). The web slides against an upward rubber piece (84) on the flow side (86) of a tube (62). Each wing is provided with a vertical stopper (82) which rides over the inner face (87) of the tube, thus providing a double seal against dust. An external knife seal is positioned to rub against the web as the web moves to a position to increase or lower the flow of dry cement. The roof is covered by a pair of receiving gates which may be operated from floor level, without need for climing.
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