BACKWARD TILTING PULL-UP DUST COLLECTOR

PROBLEM TO BE SOLVED: To enlarge the screw area by providing a falcrum for tilting the lower part of the main body toward the downstream above a vertical line pasing the lower end of a dust collector main body with the upper part thereof tilted backward to the water stream. SOLUTION: A tilting pivot part 16 is provided above a vertical line V passing the lowermost end of the main body 3 which is on the upstream of a channel of a substantially dog-leg like dust collector main body 2 and in a position of about intermediate height of the main body 3, and a tilting working point 19 of a hydraulic cylinder 18 or the like is provided near the bent part 17 of the main body 3. In the case of pulling up the lower end of the main body 3 toward the downstream of the channel, moment of water pressure load is left-handed rotation similar to the moment of pull-up thrust, so that it does not become pull-up resisting force so as to reduce the size of the hydraulic cylinder 18. The pivot part 16 is located on the upstream of the channel from the center of gravity of the main body 3, so that the lower end of the main body 3 can be elongated to the vicinity of the bottom bed 9 of the channel to the utmost. Thus, the screen area can be enlarged to secure water passing amount.