| 摘要 |
<P>PROBLEM TO BE SOLVED: To stably supply powder and grain constantly to an annular passage by a uniform angle of repose with small required rotating power by rather smoothly descending the powder and grain along the inner surface of an inner tube without making the powder and grain in the inner tube rotate together with the inner tube. <P>SOLUTION: In this apparatus for guiding descent in a powder and grain feeder, the outer surface of the inner tube provided to a machine frame 1 is integrally joined to the upper end of a bottomed outer tube 4' through an annular partition plate 5 on the common center axis. The annular passage formed between the inner and outer tubes communicates with a distribution distance formed between the lower end of the inner tube and the bottom plate 6 of the outer tube. A plurality of rotary vanes 7 which are rotated about the center axis c are installed along the upper surface of the bottom plate 6. Tips of the rotary vanes 7 are joined to a rotary ring 11 installed along the inner peripheral surface of the outer tube. A plurality of feed claws extending inward are provided to the rotary ring. A supply port 4 is opened in the bottom plate 6 at the annular passage 3. The inner tube is formed in a reverse-conical shape, and hard buildup welding 10 is applied to the inner surface of the inner tube. <P>COPYRIGHT: (C)2012,JPO&INPIT |
