Pneumatic line for the pneumatic transport of powdery to fine-grained construction materials to a protective support arrangement in underground working

摘要

In a pneumatic line for the pneumatic transport of powdery to fine-grained construction materials to a protective support arrangement in underground working, consisting of a straight pipe section and a discharge pipe or hose which is connected to the pipe section via one or more pipe bends, a wetting pipe being installed near the discharge end, which wetting pipe is attached to a line feeding activator liquid and having one or more nozzles which are preferably each fastened individually in a pipe socket, e.g. a threaded sleeve, passing through the wall of the wetting pipe, provision is made according to the invention for the pipe bend or the pipe bend nearest to the discharge pipe or hose to serve as the wetting pipe, the pipe sockets passing through the inner curvature of the pipe wall and the nozzles being directed towards the concave pipe wall.