Coriolis mass flow meter

Abstract

Two flow tubes 1 and 2 of a Coriolis mass flow meter are formed into an arch shape, with the tubes bent in only one direction. Entry-side and exit-side manifolds 25 are smoothly bent from the inlet of the entry-side manifold and the outlet of the exit-side manifold to joints connecting the two flow tubes to the manifolds, and connected to the flow tubes 1 and 2 at the joints at a predetermined angle in the same direction. By making the flow tubes into a parallel arched tube structure having good stress distribution and shock resistance, effects on the flow meter of external oscillations, installation conditions, piping stresses and thermal stresses can be reduced.

Description

technical field [0001] The present invention relates generally to a Coriolis flowmeter, and more particularly to a Coriolis mass flowmeter employing two parallel arcuate flow tubes. Background technique [0002] The working principle of the mass flowmeter (Coriolis mass flowmeter) is such that when the two ends of the pipeline carrying the flow fluid to be measured are supported, and the pipeline vibrates around the support fulcrum perpendicular to the direction of fluid flow, the It is well known that the Coriolis force onto the pipe (hereinafter, the pipe to which the vibration is applied is referred to as the flow tube) is proportional to the fluid mass flow. Flow tubes for Coriolis mass flow meters are of two types: bent and straight. [0003] Fig. 5 is a schematic diagram of a conventional two-parallel elbow type Coriolis mass flowmeter. As shown, the flow tubes 1 and 2 consist of two parallel bent tubes (U-shaped tubes) driven in their middle by a drive unit 15 compr...

AI Technical Summary

Problems solved by technology

As shown in the two states of the vertical vibration of the flow tube in Fig. 6(B), the vibration nodes that should be fixed by the base plate are also subjected to vibration, which makes accurate measurement difficult

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