Low-power-consumption and high-precision hot fluid metering method

Abstract

A low-power-consumption and high-precision hot fluid metering method solves the problems that an existing metering mode cannot effectively eliminate pipeline vibration, turbulence and bubbles, the metering precision degree is low, and the production cost is high. According to the hot fluid metering method, the turbulent flow and the eddy flow in a pipeline are rectified and adjusted by a rectifying hole, so that the turbulent flow and the eddy flow are changed into a straight uniform flow; and then, the straight uniform flow flows along the pipe wall of a convergent-divergent pipe behind the rectifying hole, and the flow beam firstly shrinks to flow in a jet flow form. In the jet process, a negative pressure area around the inlet in the pipe can be enlarged, negative pressure vortexes areformed in front of the electrodes, and then gas is separated and slowly gathered to form bubbles. Afterwards, an alternating magnetic field is generated through an excitation coil on the electromagnetic excitation signal collection pipe, when the fluid flows, induced electromotive force is generated at the two electrodes, and then the flow and the heat value are finally measured through the multi-stage filtering and anti-interference technology; and the flow metering accuracy can be effectively improved, and the production cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of flow metering, and specifically relates to a device that can adjust turbulent flow and turbulent flow rectification in pipelines to straight and even flow, which is beneficial to electromagnetic field excitation and flow rate electrode measurement, can effectively improve the accuracy of flow metering, and reduce production costs. Low power consumption and high precision thermal fluid metering method. Background technique [0002] At present, although the production cost of the conventional impeller heat meter is low, its measurement accuracy is insufficient, and its ability to resist dirt is also poor, so it is difficult to be widely used. At the same time, ultrasonic heat meters have the advantage of easy installation, but the use of ultrasonic heat meters has disadvantages such as pipeline vibration, turbulence, air bubbles and dirt, which often cause inaccurate flow measurement. Especially for domest...

AI Technical Summary

Problems solved by technology

[0002] At present, although the conventional impeller-type heat meter has low production cost, its measurement accuracy is insufficient, and its ability to resist dirt is also poor, so it is difficult to be widely used.

At the same time, the ultrasonic heat meter has the advantage of easy installation, but the use of the ultrasonic heat meter has disadvantages such as pipeline vibration, turbulence, air bubbles and dirt, which often leads to inaccurate flow measurement.

Especially for domestic heating pipelines, due to the narrow space and many pipeline bends, it is easy to cause unstable water flow and low measurement accuracy.

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