| 摘要 |
PROBLEM TO BE SOLVED: To stabilize the alternating vibration of a Coriolis flowmeter, which has an annular loop-shaped measuring tube, so as to improve the mass flow accuracy. SOLUTION: A measuring tube 2, which has an annular loop 2b at one lap or more and less than two laps, is inserted for fixation into a flow-in port 1c and a flow-out pot 1d of an outer cylinder 1 provided with connecting flanges 1a, 1b having the flow-in port 1c and the flow-out port 1d on an axis X-X. The annular loop 2b is integrally supported by first support plates 6, 7, which are arranged at an angleθ(<=30), and driven as a part of the annular loop 2b for resonance around the first support plate 6 and the first support plate 7 by a driving unit 8. With this vibration, although the annular loop 2b within the angleθis vibrated, the first support plates 6, 7 work as a joint part, bad influence is not applied to the vibration of the curved annular loop 2b, which is driven for resonance.
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