Screw-conveyor device for an apparatus for the underground advancing of pipe sections

摘要

On the screw-conveyor device for an apparatus for the underground advancing of pipe sections from a press shaft, a control head with a trailing portion as well as a scraper disc rotatable in the end area of the control head are provided in front of the frontmost pipe section, from which scraper disc a screw conveyor runs on a shaft in the direction of the press shaft, in which arrangement a conveying tube accommodating the screw conveyor is sealed off in the area of the control head from the cylinder wall of the control head via a bulkhead, and means for preventing the ingress of water are provided in the conveying tube. The screw conveyor has a gap, the length of which corresponds to at least the diameter of the screw conveyor, the screw conveyor ending in an open position at the start of the gap, and a further scraper disc being provided at the front end at the extension of the screw conveyor, which scraper disc rotates on the shaft in the conveying tube. <IMAGE>