Coupling for a coaxial arrangement of at least two pipelines

摘要

The invention relates to a releasable coupling for a coaxial arrangement of at least two pipelines which are of different diameters and through which flow takes place differently, with a pipeline arrangement which likewise exhibits two pipelines through which, similarly, flow takes place differently. Said releasable coupling is designed in the manner of a plug and a socket and comprises a plug-in piece and a receiving piece. They are arranged coaxially with respect to one another. The inner pipe of the plug-in piece projects out of the outer pipe. The inner pipe of the receiving piece is set back with respect to its outer pipe essentially by the same amount as the inner pipe of the plug-in piece projects out of its outer pipe. The two pipes of the plug-in piece and of the receiving piece are provided with closures. Moreover, plug-in piece and receiving piece are equipped with means which, when plugged one into the other, result in mutual opening of the corresponding closures of plug-in piece and receiving piece.