Patent ID: 11959468
Assignee: PUTZMEISTER ENGINEERING GMBH
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. An apparatus for conveying thick matter, comprising:
a drive cylinder for receiving hydraulic liquid;
a drive piston which is arranged in the drive cylinder;
a conveying cylinder for receiving the thick matter;
a conveying piston which is arranged in the conveying cylinder;
a piston rod which is fastened to the drive piston for motion coupling to the conveying piston,
wherein the drive cylinder has a rod-side passage for pressurization of a rod side of the drive piston with the hydraulic liquid and has a crown-side passage for pressurization of a crown side, which is averted from the rod side, of the drive piston with the hydraulic liquid;
a drive pump which is designed to generate a drive volume flow, with a drive pressure, of the hydraulic liquid for movement of the drive piston;
a pump connection which is designed for a changeable connection of the drive pump to the rod-side passage or to the crown-side passage for the flow of the hydraulic liquid;
a sensor device comprising at least one sensor and an evaluation unit, wherein the sensor device is designed to independently detect whether the pump connection is connected to the rod-side passage or to the crown-side passage; and
a control unit which is designed to control the apparatus in a rod-side operating mode when a rod-side pump connection is detected and to control the apparatus in a crown-side operating mode when a crown-side pump connection is detected, and
wherein the sensor device is designed to:
measure at least one characteristic variable, which is dependent on a pump connection side, of the drive piston, of the conveying piston, of the piston rod, of the hydraulic liquid and/or of the thick matter in detection operation of the drive pump, and
detect a pump connection side based on the measured characteristic variable.