Multi-nozzle balanced flow meter

Abstract

The invention discloses a multi-nozzle balanced flow meter, comprising a multi-nozzle balanced circular plate (1), annular chambers (3), connection pipes (5) with flanges, a straight pipe section (8), pressure tapping pipes (9) and a sensor (10), wherein the multi-nozzle balanced circular plate (1) is provided with multiple nozzles in regular and uniform distribution, the annular chambers (3) are provided with positioning grooves and pressure tapping holes, the multi-nozzle balanced circular plate (1) is clamped between the two annular chambers (3) by the positioning grooves, the connection pipes (5) with the flanges are respectively located at the outer sides of the two annular chambers (3) and are connected into a whole by studs (6), the connection pipes (5) with the flanges are provided with the straight pipe section (8) by a connection flange, the pressure tapping pipes (9) are welded on the pressure tapping holes of the annular chambers (3), and the sensor (10) is welded on the pressure tapping pipes (9). The flow meter is wider in measurement range, higher in measurement accuracy, short in the straight pipe section, low in blocking possibility, more convenient to use, high in interchangeability with other flow meters, and longer in service life.

Description

technical field [0001] The invention relates to a measuring device for fluid flow in pipelines, in particular to a multi-nozzle balanced flowmeter. Background technique [0002] Now, the engineering of all walks of life pays special attention to accurate measurement, especially the flow measurement of the fluid in the pipeline of the fluid engineering layout adopts the flow meter. Differential pressure flowmeter occupies the forefront of flowmeter application due to its mature technology, simple structure, stability and reliability, and wide application surface. The differential pressure flowmeter is an instrument that measures the flow rate based on the differential pressure generated by the flow detection part installed in the pipeline, the known fluid conditions and the geometric dimensions of the detection part and the pipeline; however, the measurement range of this differential pressure flowmeter The range is narrow, because the flow meter signal (differential pressur...

AI Technical Summary

Problems solved by technology

The differential pressure flowmeter is an instrument that measures the flow rate based on the differential pressure generated by the flow detection part installed in the pipeline, the known fluid conditions and the geometric dimensions of the detection part and the pipeline; however, the measurement range of this differential pressure flowmeter The range is narrow, because the flow meter signal (differential pressure) has a square function relationship, which limits the range of flow measurement

At present, the most commonly used nozzle forms of nozzle flowmeters are standard nozzles, long-neck nozzles, Venturi nozzles, etc. These throttling forms generally have the following disadvantages: the repeatability and accuracy of measurement are at the general level of flowmeters, due to many factors The influence is intricate, and the accuracy is difficult to improve; the site installation conditions are relatively high, and a long straight pipe section is required, which is generally difficult to meet, and the pressure loss is relatively large

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