| 摘要 |
<p>The present invention relates to a connection fitting for connecting a ring main with at least one consumer to a run of storey pipes or riser pipes, having inlet and outlet openings (2, 4) which can be connected to the pipe run, and having an infeed opening (34) for the ring main, this opening being located between the inlet and outlet openings and having a cross-sectional constriction (16) arranged upstream of it in the flow direction (S). The present invention also relates to a water-mains system having at least one run of storey pipes or riser pipes, to which a plurality of ring mains are connected via outfeed and infeed openings, and having a cross-sectional constriction which is provided in the pipe run between the outfeed and infeed openings of the associated ring main. The present invention is based on the problem of specifying a connection fitting which, in the region of ring main assigned to the connection fitting, gives rise to improved flow conditions and provides a water-mains system which is better able to meet the practical requirements. In order to solve the problems, the present invention proposes a connection fitting and a water-mains system of the previously known type which are characterized in that they comprise means (12, 28) for varying the through-passage surface area of the cross-sectional constriction (V).</p> |
