Coriolis mass flow meter having a thin-walled measuring tube
AssigneeKrohne AG
InventorsMarco Amabili, Rinaldo Garziera
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Abstract
A mass flow meter operating by the Coriolis principle, with a measuring tube through which flows a medium, at least one exciter associated with and exciting the measuring tube, and at least one sensor associated with the measuring tube for capturing the Coriolis forces and/or the Coriolis-force-induced oscillations. The measuring tube is designed as a thin shell. A thin shell is understood to be characterized by a wall thickness h much smaller than its radius R, and a length L of the same order of magnitude of the radius R. The mass flow meter according to the invention uses vibration modes with more than one circumferential wave. Thus, a mass flow meter with high sensitivity and low pressure drop is achieved.
Claims14
A mass flow meter operating by the Coriolis principle with a measuring tube through which flows a medium, at least one exciter associated with and exciting the measuring tube, and at least one sensor associated with the measuring tube for capturing the Coriolis forces and/or the Coriolis-force-induced oscillations wherein the measuring tube is designed as a thin shell, and an inner tube is provided inside the measuring tube to make an annular flow.
A mass flow meter operating by the Coriolis principle, with a measuring tube through which flows a medium, at least one exciter associated with and exciting the measuring tube, and at least one sensor associated with the measuring tube for capturing the Coriolis forces and/or the Coriolis-force-induced oscillations wherein the measuring tube is designed as a thin shell, the measuring tube has a length of the same order of magnitude of the radius, and the wall thickness of the measuring tube is smaller than the radius of the measuring tube at least by a factor of 50.
A mass flow meter operating by the Coriolis principle, with a measuring tube through which flows a medium, at least one exciter associated with and exciting the measuring tube, and at least one sensor associated with the measuring tube for capturing the Coriolis forces and/or the Coriolis-force-induced oscillations wherein the measuring tube is designed as a thin shell, the wall thickness of the measuring tube is smaller than the radius of the measuring tube at least by a factor of 50, the wall thickness of the measuring tube is equal to or less than the 0.5 mm, and the ratio of the length of the measuring tube relative to the radius of the measuring tube is equal to or less than 6.
Dependencies are inferred from the claim text.