公开(公告)号：US20210239103A1

公开(公告)日：2021-08-05

申请号：US17058276

申请日：2019-05-22

Applicant: Putzmeister Engineering GmbH

Inventor： Wolf-Michael PETZOLD ,  Jan-Martin VEIT ,  Michael SCHAEFER ,  Frederik KORT

IPC: F04B15/02 ,  F04B49/00 ,  F04B53/14 ,  F04B51/00 ,  F04B9/103

Abstract: An apparatus for conveying thick matter has a drive cylinder for receiving hydraulic fluid, a drive piston, which is arranged in the drive cylinder, a conveying cylinder for receiving thick matter, a conveying piston, which is arranged in the conveying cylinder, and a piston rod, which is fastened to the drive piston for coupling motion together with the conveying piston. The drive cylinder has a rod-side opening for applying pressure to a rod side of the drive piston by way of hydraulic fluid and a crown-side opening for applying pressure to a crown side of the drive piston facing away from the rod side by the hydraulic fluid. A drive pump is designed to generate a drive volume flow having a drive pressure of hydraulic fluid for moving the drive piston. A pump connection is designed for variable connection of the drive pump to the rod-side opening or the crown-side opening for the flow of hydraulic fluid. A sensor is designed for automatic detection of whether the pump connection is connected to the rod-side opening or the crown-side opening. A control unit controls the apparatus in a rod-side operating mode, when the rod-side pump connection is detected, and in a crown-side operating mode, when the crown-side pump connection is detected.

公开(公告)号：US20230265843A1

公开(公告)日：2023-08-24

申请号：US18012712

申请日：2021-06-07

Applicant: Putzmeister Engineering GmbH

Inventor： Carl WIESENACK ,  Benjamin HOELZLE ,  Michael SCHAEFER ,  Wolf-Michael PETZOLD ,  Jan-Martin VEIT ,  Ralf WEIMER

IPC: F04B49/10 ,  F04B15/02

CPC classification number: F04B49/106 ,  F04B15/02 ,  F04B2201/0201

Abstract: A method operates a construction material and/or viscous-material pump having: at least one conveying cylinder, the conveying cylinder being designed to receive and discharge construction material and/or viscous material; and at least one conveying piston, the conveying piston being disposed in the conveying cylinder for movement in order to draw construction material and/or viscous material into the conveying cylinder and to displace drawn-in construction material and/or viscous material out of the conveying cylinder. The method includes: conveying construction material and/or viscous material, by movement of the conveying piston in order to draw in and displace construction material and/or viscous material; sensing a position variable during the movement, the position variable characterizing a position of the conveying piston along its stroke in the conveying cylinder; sensing a conveying variable during the movement, the conveying variable being of a different type than the position variable and characterizing the conveying of construction material and/or viscous material by the pump; and determining a profile of a subsequent movement of the conveying piston by linking the sensed position variable and the sensed conveying variable to each other; and controlling the subsequent movement in accordance with the determined profile.

公开(公告)号：US20220307490A1

公开(公告)日：2022-09-29

申请号：US17637351

申请日：2020-08-20

Applicant: Putzmeister Engineering GmbH

Inventor： Carl WIESENACK ,  Benjamin HOELZLE ,  Michael SCHAEFER ,  Wolf-Michael PETZOLD ,  Jan-Martin VEIT ,  Wilhelm F. HOFMANN

IPC: F04B49/06 ,  F04B15/02 ,  F04B49/10

Abstract: A method monitors the state of a device having a first drive cylinder for receiving hydraulic fluid and a first drive piston which is movably arranged in the first drive cylinder. The method determines a speed of the first drive piston, establishes a difference between the determined speed of the first drive piston and an expected speed of the first drive piston, and determines a faulty state as a function of the difference established between the determined speed of the first drive piston and the expected speed of the first drive piston.