Pipe laying process not requiring trenches involves docking widening step on tip of steel pipe string while turning screw conveyor in same direction

摘要

The process involves first driving a steel pipe string (3) with a screw conveyor (4) and control device from the starting shaft (1) into the target shaft (2) and then docking a widening step (6) on the steel tube string to drive the product pipe (7). The widening step is on the tip of the pipe string on the target shaft side. As it is docked, the screw conveyor is rotating in the same direction and the product pipes are pressed home.