Patent ID: 7575674
Filing Date: 2009-08-18
Classification: B01D

Abstract:
1. A rotary bar screen device provided to a seawater intake port of a seawater refreshing equipment or an electricity generating equipment, and filtering foreign materials introduced together with seawater, the device comprising: a driving motor provided over a support frame, and transmitting a driving force; an up/down pair of driving and driven sprockets provided at both left and right sides of the support frame, and driven by the driving force received from the driving motor; left and right transfer chains connecting the driving and driven sprockets with each other while circulatively moving; a plurality of screen buckets provided between the left and right transfer chains, including upper and lower plates, a side plate and a plurality of bar blocks provided in through-holes between the upper and lower plates and filtering the foreign materials in the seawater and transferring the filtered foreign materials; a slide plate for guiding the foreign materials dropping from the screen buckets; an inclination guide provided between the transfer chain and the slide plate so that the screen bucket can easily drop the foreign materials as inclining when moving down; a collection tub provided under the slide plate to collect the foreign materials dropping from the screen bucket along the slide plate; capstans provided over the left and right driving sprockets and connected to a driving shaft of the driving sprocket to control tensions of the transfer chains; a removal unit provided between the left and right driving sprockets, mounted on the same axis of the driving sprocket to rotate with the driving sprocket at the same time and pushing the foreign materials out of the screen bucket, wherein the removal unit comprises a drum provided on the same axis as the driving sprocket, a plurality of fin brackets radially provided around the drum and a plurality of fin blocks whose both bent ends are fixed to the fin brackets, the upper and lower plates constituting the screen bucket are manufactured by bending thin flat plates, and the bar blocks provided in the through-holes between the upper and lower plates are assembled by fixing bolts.