SLIDE VALVE FOR A TWIN-CYLINDER PUMP FOR VISCOUS FLUIDS

摘要

The present invention relates to an active valve of a pump with two cylinders, in particular a concrete pump mounted on a truck. The actuation valve 20 has a C-shaped pivot pipe 16 which is connected to the discharge line by a rotary joint at its upper end and mounted to be rotated by a conversion mechanism about an axis parallel to the axis of the pump cylinder 10. The lower end fitting snugly to the wear ring 28 is alternatively connected to the orifice 22 at the end of the pump cylinder connected to the rear wall of the supply tank 14. Drive cylinders 52 designed as piston / cylinder units to allow pivot pipe 16 to rotate over long distances are mounted in ball sockets placed on cylinder bearings 48 and 56 with their working shafts facing rear wall 24. It is composed between obtuse angles. In addition, the valve is fitted to the conversion lever 46, which has a support arm 64 at the discharge end and places an extension tube 42 connected to the discharge end of the upper end of the pivot pipe on the support arm.