| 摘要 |
The sand drying device where a screw(11) rotated by a rotary shaft(12) is installed within a sand selection box(2) is provided with a vacuum valve(3) which is installed on an installation shaft(102) coupled on the one end of the rotary shaft(12) by means of a flange, a plurality of air intake holes(41) which are formed from the inside of a rotary plate(4) to the outer peripheral surface thereof for passing through by a 90 degree. a packing(31) and a close contact plate(32), a plurality of connecting pipes(401) which are connected to the air intake holes(41) and installs a bucket(8) having a sand filtering net(801) on the end thereof, openings(501,502) which are each formed on a vacuum chamber(51) and a hollow chamber(52) divided on the upper and lower portions of a fixed plate(5), a plurality of springs(6) which are supported on a spring installation groove(601) on the rear portion of the fixed plate(5) and are covered with a spring cap(61), and a thrust bearing(7) which supports the one end of the spring cap(61) and enables the fixed plate(5) to be closely contacted with the rotary plate(4).
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