Even speed tube of flow sensor

Abstract

A uniform velocity tube of flow rate transducer consists of high pressure sampling hole at flow receiving surface, low pressure sampling hole at side surface between flow receiving surface and flow departing surface which are built on tube wall of the uniform velocity tube . It features that the said tube section is prepared to be a bullet head form so fluid is splited along two side surfaces of said tube section formed as bullet head to make a flow coefficient relatively stable when fluid flows through the tube.

Description

technical field [0001] The invention relates to a flow sensor, in particular to a velocity equalizing tube of the flow sensor. Background technique [0002] In the process of flow measurement, due to the complexity of the measured medium, there are various measurement methods, so various flow sensors based on different measurement principles have emerged. According to the measurement method and structure, the flow sensor can be divided into differential pressure type, float type, volumetric type, turbine type, etc. [0003] For a sensor that measures fluid flow in a sealed pipe, it consists of a probe that is inserted into the sealed pipe with an equalizing tube that has a face facing the fluid (upcoming face) and a face facing away from the fluid (back flow). noodle). The equalizing tube has a series of regularly distributed high-pressure pressure-taking holes on the upstream surface, and a series of regularly distributed low-pressure pressure-taking holes on the backflow...

AI Technical Summary

Problems solved by technology

When the equalizing tube is working, the measured fluid medium will form a vortex behind the equalizing tube, and the vortex will cause the particles in the measured fluid medium to enter the low pressure pressure hole of the equalizing tube, which will easily cause the low pressure pressure hole to be blocked. Seriously affect the accuracy of the flow sensor

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