| 摘要 |
In a multi cylinder thick materials pump ( 1 ) for feeding concrete in particular, whose at least two feeding cylinders ( 3, 5 ) feed the thick material from a pre filling container ( 7 ) into a feed line, and a shift valve ( 9 ) for alternatively connecting the feeding cylinders, having a feed line associated with it, comprising at least two rotationally movable valve bodies, each comprising a straight transfer section ( 15 L, 17 L) between each one of the feeding cylinders and the feed line, connected downstream of the feeding cylinders to a collector tube ( 19 ), the shift valve ( 9 ) according to the invention comprising at least one, but preferably two rotationally movable rotating slides ( 15, 17; 15', 17'; 15'', 17'' ), each oft them comprising a straight transfer section ( 15 L, 17 L) for connecting the feeding cylinder respectively associated with it to the feed line, and at least one section blocking the connection. Also a process for operating of this thick materials pump for continuous feeding is described.
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