Monitoring devices and control systems

Details Monitoring devices and control systems Monitoring devices and control systems

G - Physics

01

F

G01F 1/28 (2006.01) G01F 1/24 (2006.01)

Patent

CA 2370825

A fluid flow monitoring device consisting of a cylinder (4) having an inlet (1) and a plurality of outlets (16, 17, 18, 19); a piston (8) slideable within and in substantially fluid tight contact with the internal surface of the cylinder (4); biassing means (10) for biassing the piston (8) into a closed position which prevents fluid flowing to the outlets (16, 17, 18, 19) when the pressure difference in the fluid between the said inlet (1) and outlets (16, 17, 18, 19) is substantially zero but allows the piston (8) to move to different positions within the cylinder (4) to permit fluid flow through an increasing number of outlets (16, 17, 18, 19) when the pressure at the outlets increasingly falls below that at the inlet (1); and a detector (12, 13, 14) for detecting the position of the piston (8) within the cylinder (4) and thereby the occurrence of fluid flow through the device.

Selon cette invention, un dispositif de surveillance de flux de fluide comprend un cylindre (4) possédant une entrée (1) et plusieurs sorties (16, 17, 18, 19); un piston (8) coulissant à l'intérieur du cylindre (4), en contact sensiblement étanche avec la surface interne de celui-ci; un système de sollicitation (10) pour solliciter le piston (8) et le mettre en position fermée, ce qui prévient l'écoulement des fluides vers les sorties (16, 17, 18, 19) lorsque la différence de pression dans le fluide entre l'entrée (1) et les sorties (16, 17, 18, 19) est sensiblement nulle tout en permettant au piston (8) de se mettre dans des positions différentes à l'intérieur du cylindre (4) pour que le fluide puisse s'écouler à travers un nombre croissant de sorties (16, 17, 18, 19) lorsque la pression aux sorties tombe de façon croissante en dessous de celle à la sortie; et un détecteur (12, 13, 14) destiné à détecter la position du piston (8) à l'intérieur du cylindre et, partant, l'existence d'un flux de fluide à travers le dispositif.

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