Patent ID: 6308580
Filing Date: 2001-10-30
Classification: G01F

Abstract:
A Coriolis flowmeter comprising:a pair of parallel oriented flow tubes wherein each of said flow tubes is divided into a plurality of segments including:in-line segments defining opposing end portions of each of said flow tubes wherein said in-line segments have a longitudinal axis that is substantially parallel with a longitudinal axis of a pipeline and is contained in a first plane containing said pipeline,bending segments in each of said flow tubes that extend from an end of said in-line segments and define a bend that changes said longitudinal axis of each of said flow tubes from being oriented in said first plane to being oriented substantially perpendicular to said first plane, anda substantially u-shaped segment that extends between said bending segments on opposing end portions of said flow tubes, wherein said substantially u-shaped segment in each of said flow tubes defines a curve in each of said flow tubes that changes said longitudinal axis of said flow tube to be oriented in a direction that is substantially parallel to said first plane to traverse between said bending segments;a first set brace bars affixed to each of said flow tubes at points in said bending segments where said longitudinal axis of said flow tubes is substantially forty-five degrees from being parallel with said first plane;said first set of brace bars providing frequency separation between modes of vibration in said flow tubes; anda second set of brace bars affixed to said flow tubes at points in said bending segments on said opposing ends of said flow tubes between said in-line segments and said first set of brace bars wherein said second set of brace bars enhance zero stability for each of said flow tubes.