| 摘要 |
<p>The invention relates to a multi-cylinder viscous matter piston pump (1), for transporting in particular concrete. Said pump comprises at least two transport cylinders (3, 5), which transport the viscous matter from a pre-filled container (7) into a transport conduit and a changeover valve (9) for the alternate connection of the transport cylinder to the transport conduit. Said valve comprises at least two rotatable valve bodies that have a respective conduit section (15L, 17L) between one of the respective transport cylinders and the transport conduit and that are connected downstream of the transport cylinder to a collecting tube (19). The inventive changeover valve (9) comprises at least, preferably two substantially rotational rotary valves (15, 17; 15', 17'; 15", 17"), each of which comprises a straight conduit section (15L, 17L) for connecting the associated transport cylinder (3, 5) to the transport conduit and at least one section that blocks said connection. The invention also relates to a method for operating said viscous matter pump in a continuous transport mode.</p> |
