Apparatus for distributing concrete, especially in the shuttering of gallery linings in mine and tunnel workings

摘要

An apparatus for distributing concrete, especially in the shuttering of gallery linings in mining and tunnel workings, comprises a transportable distribution mast carrying an articulated conduit for conveying concrete which is pivoted on a column which can rotate around its axis. The mast comprises a swivel extension forming the end section thereof, and a main boom which connects the column to the swivel extension, the swivel extension being foldable from above onto the main boom. The main boom is divided into several mast sections joined together by power-operated pivotal connections so that the mast is articulatable in a swivel plane containing the column axis, the range of relative pivotal movement between the mast sections being such that the main boom may be extended upwardly and forwardly from the folded position of the mast sections, with the swivel extension in its folded position, the power-operated pivotal connections of the main boom being disposed below the folded swivel extension.