High-precision balancing flowmeter

Abstract

The invention discloses a high-precision balancing flowmeter. The high-precision balancing flowmeter comprises connecting pipes, a straight pipe section, a sensor, two packer rings and two pressure measuring pipes, wherein the two connecting pipes are connected through a bolt, the other end of each connecting pipe is connected with the straight pipe section, the packer rings are arranged on the end faces of the two connecting pipes, a pore plate body is arranged between the two packer rings, and multiple nozzles are arranged on the pore plate body; an air duct communicated with the interior of the corresponding connecting pipe is formed in one side of each packer ring, one end of each pressure measuring pipe is communicated with the corresponding air duct, and the other end of each pressure measuring pipe is communicated with the sensor; a buffer groove communicated with the interior of the corresponding connecting pipe is formed in the inner wall of the other side of each packer ring; each nozzle is composed of a shrinkage section with inner diameter decreasing gradually in the flowing direction of fluid, a straight section and an enlargement section with inner diameter increasing gradually in the flowing direction of fluid, wherein the shrinkage section, the straight section and the enlargement section are connected in sequence. The connecting pipes are connected through a flange, the connecting pipes and the straight pipe section are connected through flanges, so that the practicality of the connecting pipes in measurement of different types of sensors is improved greatly, and installation and detachment can be achieved conveniently and quickly.

Description

technical field [0001] The invention relates to the field of flow measurement, in particular to a high-precision balanced flowmeter. Background technique [0002] 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 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 ...

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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