| 摘要 |
PURPOSE:To exactly remove screen cake (dust) by using a back scraping type dust collector to scrape up the screen cake from the back side of a dust removing lattice, having a guide arm to guide a scraping rake. CONSTITUTION:Screen cake (dust) 4 in flowing water of a waterway is set aside toward the upstream side A of a screen bar 1. A rake frame 6 is dragged and raised by a rope 8 under the guidance of an arm 7, and thereby the tip of a rake 5 scrapes up the screen cake 4 set aside by the screen bar 1, whereupon a chute 11 is tilted toward the place G as shown by broken line. Then, the arm 7 is moved from the place C to D in rocking manner, the tip of the rake 5 is set back toward the down stream B direction, and the screen cake 4 on the rake 5 is wiped down to the screen bar 1. Furthermore, a wiping bar 13 is tilted to the place F, and the screen cake 4 on the screen bar 1 is wiped down and directed by the chute 11. |
