Valve for concrete pump has change drive independent of feed housing, double funnel for each pump cylinder, and mechanism to open/close concrete channels

摘要

The valve unit has a change drive, independent of the feed housing, a double funnel of pisolitic shape, with double function, for each pump cylinder. It also has a mechanism to open and close passage channels for the pumped concrete. The change drive contains the double funnel, which is moved about the axis of an imaginary angle of 60 deg , by a piston. The feed housing is fastened to the change drive via a side wall. Concrete is pumped by two pump pistons, which are synchronized with the double funnel.