Method and arrangement for automatic monitoring and correction o

Details Method and arrangement for automatic monitoring and correction o Method and arrangement for automatic monitoring and correction o

1998-12-17

2000-08-29

Ferensic, Denise L.

Fluid handling

Processes

Involving pressure control

162263, 1623581, 492 7, 492 16, 492 20, F17D 116

Patent

active

061092851

ABSTRACT:
Method and arrangement for automatic monitoring and correction of the regulation pressure of regulation valves in a regulation valve block in a variable-crown roll in a paper machine. The regulation pressure of the regulation valve in each regulation zone in the regulation valve block can be connected alternatingly to a reference pressure detector whose measurement signal is compared with the measurement signal of the actual value of the regulation pressure in the regulation zone concerned. The result of the comparison is stored on the page of monitoring of pressure detectors contained in the central computer system, on which page, in addition to this difference, set values and actual values of the regulation zone pressures as well as the value of the reference measurement are provided. In addition, a correction can be made to the actual value of the regulation pressure in the regulation zone concerned if the difference between the measurement signal of the reference pressure detector and the measurement signal of the actual value of the regulation pressure in the regulation zone concerned is higher than a predetermined value.

REFERENCES:
patent: 3269352 (1966-08-01), Van Winkle
patent: 4464921 (1984-08-01), Surat
patent: 4644860 (1987-02-01), Brendel
patent: 4858292 (1989-08-01), Buhlmann et al.

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