Device and method for controlling a thick matter pump

Details Device and method for controlling a thick matter pump Device and method for controlling a thick matter pump

2005-03-18

2009-11-03

Freay, Charles G (Department: 3746)

Pumps

Condition responsive control of pump drive motor

With condition responsive control of pump fluid valve

C417S028000, C417S046000, C417S053000, C417S342000, C417S900000

Reexamination Certificate

active

07611332

ABSTRACT:
A device and a method for controlling a two-cylinder thick matter pump to achieve a reliable operation even of single-circuit two-cylinder thick matter pumps. To this end, the pipe switch includes a position transmitter responding to the pivoting position. At least two cylinder switching sensors are arranged on the working cylinders at a distance from each other, responding to the passing pistons of the drive cylinder, and/or a pressure sensor responding to the pressure course at the high-pressure outlet of the reversible pump is provided. A computer-assisted reversing device has a control routine responding to output signals of the position transmitter and to output signals of the cylinder switching sensors and/or the pressure sensors, enabling the programmed control of a control body for adjusting the flow quantity and direction of the reversible pump, and a reversing element arranged in the hydraulic branch of the pipe switch.

REFERENCES:
patent: 4569642 (1986-02-01), Dwyer
patent: 5127806 (1992-07-01), Benckert
patent: 5209649 (1993-05-01), Dose et al.
patent: 5238371 (1993-08-01), Benckert
patent: 5330327 (1994-07-01), Anderson
patent: 5332366 (1994-07-01), Anderson
patent: 5344290 (1994-09-01), Benckert
patent: 5388965 (1995-02-01), Fehn
patent: 5401140 (1995-03-01), Anderson
patent: 5520521 (1996-05-01), Benckert et al.
patent: 6171075 (2001-01-01), Muenzenmaier et al.

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