RAKE TYPE POWERED GRID Russian patent published in 2007 - IPC B01D29/44 E03F5/14 

FIELD: powered rake type grids, possibly used for removing from sewage water mechanical impurities.

SUBSTANCE: powered grid includes set of vertical parallel rods forming filtering screen and it is mounted in frame with possibility of motion. Said rods are mounted with gaps normally relative to motion direction of liquid flow. Cross section of grid rods is in the form of wedge with rounded edges of its base turned towards flow of sewage water. Filtering screen of grid includes separate interchangeable sections secured to cross rigidity ribs of frame of grid. Two endless chains are driven to motion with use of sprockets at sides of grid together with rake arranged between them and being in the form of set of toothed plates whose teeth engage with said gaps. Rigidity rib arranged in sewage water is in the form of bent metallic plate to which rubber strip is secured. Lip of grid frame base is slightly raised over duct bottom by regulated height and it is in the form diffuser. Guides for changing motion direction of rake are provided with centering gaskets arranged upstream and downstream filtering screen.

EFFECT: simplified installation, restoration and exploitation of grid.

4 dwg