Pneumatic conveying installation for bulk material, in particular in underground operation

摘要

In a pneumatic conveying installation for bulk material, in particular in underground operation, which bulk material is alternately discharged via a bulk-material discharge to one branch each of a conveying line via a gate, which has several housings which in each case serve to receive a partial quantity branched off from the bulk-material discharge and accommodate a conveying member serving to strew the partial quantity into a blast trough and also have a branch of a conveying-air line leading into the blast trough and a conveying-line branch coming out of the blast trough, shut-off members being allocated to each conveying-air and conveying-line branch, which shut-off members alternately connect the housings having the bulk-material discharge or the blast troughs to the lines or shut off the latter, provision is made according to the invention for the housings to form a construction unit with the bulk-material discharge and for the conveying members closing off the housings from the bulk-material discharge to consist of at least one piston which passes through beneath the discharge opening to apportion the partial quantity and is provided with controlled seals which perform a sealing action on the housing walls before the introduction of the strewing phase of the bulk material quantity supplied to a housing, in which arrangement the sealing pressure can be neutralised for introducing the apportioning phase of the adjacent housing, and for the conveying members to consist of slides which ... along the housings from the respectively allocated end face of the sealed-off piston to the housing discharge into the allocated blast trough during the ... Original abstract incomplete.