F - Mech Eng,Light,Heat,Weapons – 16 – K
Patent
F - Mech Eng,Light,Heat,Weapons
16
K
F16K 7/07 (2006.01) D21F 1/08 (2006.01)
Patent
CA 2150629
Pinch valves having a flexible, constrictable sleeve are used to control a dilution headbox for a paper making machine. A variety of pinch valves may be used in the present invention with the pinch valves being actuated by pneumatic or hydraulic pressure or by mechanically pinching the valves' sleeves by means of rams driven by stepper or linear drive motors. For pneumatic control, dynamic differential pressure drops are measured across the valves to determine flow rate through the valves. A pinch valve, referred to herein as a torsional pinch valve, is disclosed for dilution headbox control. In one form, a first end of a sleeve is fixedly mounted in a support frame and the second end of the sleeve is mounted for rotation in the frame. A driver rotates the second end of the sleeve such that a flow path through the sleeve is controlled. The flow path is a maximum when no torsion is placed on the sleeve and is reduced to substantially zero by sufficien~ rotation. In another form, first ends of two sleeves are secured into a support frame such that the sleeves are in axial alignment with one another. The second ends of the sleeves are secured to an annular collar or sleeve support member which is mounted for rotation between the fixedly mounted first ends. By rotating the annular collar, the cross section of the flow path is controlled.
Goldshdeyn Alexsey
Hellstrom Ake Arvid
Abb Industrial Systems Inc.
Gowling Lafleur Henderson Llp
LandOfFree
Control of dilution lines in a dilution headbox of a paper... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Control of dilution lines in a dilution headbox of a paper..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control of dilution lines in a dilution headbox of a paper... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-2062665