SCREW CAST-IN-PLACE PILE PRODUCTION DEVICE Russian patent published in 2006 - IPC E02D7/22 

FIELD: building, particularly screw pile forming.

SUBSTANCE: device comprises body, drive with load-bearing unit having outer collar joined with the body through worm gearing and inner collar joined with hollow screw working tool, which is provided with screw extensions made in lower end part. The device also has orifice for releasable valve receiving and to discharge well-filling materials into the well. Bunker is formed from upper end of working tool. Inner collar made in leading unit of the drive is joined with working tool to transmit rotation force to any working tool part through sliding connection. Inner and outer leading unit collars are connected to form the first pair. Inner collar of leading unit and working tool are coupled to form the second pair. The body and the working tool are connected by controlled fixers to constitute the third pair. The controlled fixers specify direction of mutually connected pairs in joint areas along the whole area of possible joint of each member pair. Power equipment of the drive may transmit translational and rotary movement to leading unit of the drive along with screw line pitch and operational direction specified during device operation. Cleaning unit, which removes foreign objects from outer surface of working tool is connected to inner collar of the leading unit.

EFFECT: reduced time of composite working tool reassembling and increased tool capacity.

5 cl, 5 dwg