Measuring tube structure with rectification function and ultrasonic meter

Abstract

The invention provides a measuring tube structure with a rectification function and an ultrasonic meter, the measuring tube structure comprises a measuring tube body, two groups of concentric fluid channels arranged along the axial direction of the measuring tube body are formed in the measuring tube body through a rectification device, and the concentric fluid channels comprise a measuring channel located in the middle and used for an ultrasonic measuring area. The peripheral channel is in contact with the inner wall of the measuring tube body. Meanwhile, a part of relatively stable fluid is intercepted to serve as a measurement area, so that the influence of external changes on a flow field of the measurement area is reduced, the effects of more stable and more accurate measurement and larger range ratio are achieved, and more importantly, the stable flow field can correct full-speed domain parameters through a functional equation.

Description

technical field [0001] The invention relates to the technical field of ultrasonic measurement, in particular to a measuring tube structure with self-rectification and an ultrasonic measurement meter. Background technique [0002] At present, the research on the rectification structure of ultrasonic meters focuses on the front end of the measurement area, and only the stability of the flow field in the measurement area under a certain flow rate is studied horizontally, ignoring the longitudinal consideration of the flow field distribution in the measurement area in the full-speed domain with the increase of the incoming flow velocity. The influence of stability, turndown ratio, and parameter correction, especially the flow of the fluid will be laminar flow, transition zone, and turbulent flow, which will affect the test results. In addition, the rectification effect at the front end of the measurement area only determines the instantaneous flow field distribution into the mea...

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Problems solved by technology

[0003] The present invention mainly solves the stability problem of the meter based on the flow velocity measurement when measuring the medium with a full flow velocity and a temperature of 10-60°C (depending on the medium). Solving this problem helps to improve the measurement range ratio while improving the measurement accuracy. The invention performs secondary rectification on the flow field on the basis of rectification in the front section of the measurement area, so that the measurement range is larger, the measurement result is more stable and accurate, and at the same time, it is convenient for the rear end to correct the parameters in the full speed domain through the function equation

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