Measuring and testing – Volume or rate of flow – Mass flow by imparting angular or transverse momentum to the...
Patent
1995-06-05
1997-11-25
Dougherty, Elizabeth L.
Measuring and testing
Volume or rate of flow
Mass flow by imparting angular or transverse momentum to the...
G01F 184
Patent
active
056914857
ABSTRACT:
Disclosed is a Coriolis flowmeter which is capable of detecting a mass flow and a density of fluid with an increased stability by resonantly oscillating a double tube portion consisting of an inner flow tube allowing fluid to flow therein and a coaxially disposed thereon counterbalance tube provided with a weight for equalizing the lateral natural frequency of the counterbalance tube with that of the flow tube. The Coriolis flowmeter has supporting metal means for supporting the both ends of the flow tube in such a way that the both ends of the flow tube is restricted in radial directions and axially movable in respective connecting flange; the inner flow tube has extending ends enlarged in diameter and supported in the respective connecting flanges of the outer housing. The flow tube is further supported at near-to-end portions on respective rectangle leaf springs having a plane parallel to oscillating direction and extending in radial direction of the double tube portion being perpendicular to the oscillating direction within the outer housing. The flow tube is thus supported at four stable points representing oscillating nodes, axially movable but radially restricted, assuring stable oscillation and accurate measurement of mass flow.
REFERENCES:
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Measurements, vol. 11, No. 4, Jul. 1993 London GB, pp. 289-308, XP 003387399 G. Adiletta et al. "A twin rigid straight pipe Coriolis mass flowmeter" p. 290, paragraph 5-p. 291, last paragraph; FIG. 1.
Endo Takashi
Gomi Shingo
Ichinose Kimihiro
Matsuoka Kenichi
Seki Hidemi
Dougherty Elizabeth L.
Oval Corporation
Patel Harshad
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