High-precision balancing flower meter

Abstract

The invention discloses a high-precision balanced flowmeter, which includes a connecting pipe, a straight pipe section, a sensor, two packing rings and two pressure-taking pipes, the two connecting pipes are connected by bolts, and the other end of the connecting pipe is connected to the The pipe section is connected, and a packing ring is arranged on the end faces of the two connecting pipes. The orifice plate body is arranged between the two packing rings. There are multiple nozzles on the orifice plate body. The air passage connected with the inside of the connecting pipe, one end of the pressure-taking pipe is connected with the air passage, the other end of the pressure-taking pipe is connected with the sensor, and there is a buffer groove connected with the inside of the connecting pipe on the inner wall of the other side of the packing ring. The connecting inner diameter is composed of a narrowing section decreasing along the fluid flow direction, a straight section and an expanding section whose inner diameter is increasing along the fluid flowing direction. Flange connections are used between the connecting pipe and the connecting pipe and between the connecting pipe and the straight pipe section, which greatly improves the practicability of the connecting pipe in the measurement process of different types of sensors, and is convenient for the staff to quickly install and disassemble.

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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