Device for suppressing dust at the outlet of pneumatic delivery lines for construction materials, in particular for dam construction materials in underground working

摘要

In a device for suppressing dust at the outlet of pneumatic delivery lines for construction materials, in particular for dam construction materials in underground working, a water-sprinkling section known per se is combined according to the invention with a further pipe section which is formed by a delivery-line pipe to which a feed pipe is fastened which directs finely atomized water into the core area of the flow of construction material through the delivery line, which water is atomized by the interaction of a water nozzle and a compressed-air jet in the feed pipe and a closing screen which is attached to the feed-pipe opening, which is arranged in the delivery line pipe section and is either turned away from the direction of the construction material through the delivery-line pipe or encloses an acute angle with the delivery line, the opening of the feed pipe then being fastened behind a construction-material deflector, attached in the delivery-line pipe section, in such a way that the flow of the atomized water encloses an acute angle with the flow of the construction material through the delivery-line pipe, a nozzle arranged axially in the feed pipe being provided for producing the compressed-air jet, and a water nozzle enclosing an acute angle with the compressed-air jet being provided for feeding the water, which water nozzle is accommodated in a pipe connection fastened to the feed pipe.