G - Physics – 05 – D
Patent
G - Physics
05
D
G05D 16/00 (2006.01) D21G 1/02 (2006.01) D21G 9/00 (2006.01) G01L 13/00 (2006.01)
Patent
CA 2256078
The invention concerns a method and an equipment for automatic monitoring and correcting of the regulation pressure of the regulation valves in the regulation valve block in a variable-crown roll in a paper machine. The regulation pressure of the regulation valve in each regulation zone (Z1...Z24) in the regulation valve block can be connected alternatingly to a reference pressure detector (PT), whose measurement signal is compared with the measurement signal of the actual value of the regulation pressure in the regulation zone (Z1...Z24) 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 said difference, the set values and actual values of the regulation zone pressures as well as the value of the reference measurement are given. In addition to this, a correction can be made to the actual value of the regulation pressure in the regulation zone (Z1...Z24) concerned if the reference between the measurement signal of the reference pressure detector (PT) and the measurement signal of the actual value of the regulation pressure in the regulation zone (Z1...Z24) concerned is higher than a pre-determined value.
Kivioja Pekka
Lahtinen Juha
Metso Paper Inc.
Sim & Mcburney
Valmet Corporation
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