Double C-type tube coriodis mass flow meter

Abstract

A double C-tube Coriolis mass flowmeter, the two sensitive tubes are made into a "C" shape, the two sensitive tubes are fixed by the fixing plate, and welded to the main tube body, at one end of the sensitive tube The temperature sensor-thermistor is installed on the top or other parts that do not affect the vibration characteristics. The main pipe body is a mechanical structure with completely reverse symmetry of input and output. The distance between the four ends of the two sensitive tubes and the main pipe body is very small. , close to a rigid connection, so that the force of the vibrating motion of the sensitive tube is in an internal force state, thus eliminating or reducing the dissipation of vibration energy. The sensitive tube is completely in a free state except for the connection between the end and the main tube body, eliminating the The possibility of deformation stress caused by temperature changes reduces the influence of external vibration and facilitates the installation of the flowmeter.

Description

technical field [0001] The invention relates to a Coriolis mass flow meter. Background technique [0002] As we all know, the work of the Coriolis mass flowmeter is based on detecting the Coriolis force caused by the flow of the fluid through the sensitive tube to determine its mass, that is, the sensitive tube supported by both ends is flowing with the subfluid When vibrating in the vertical direction, the Coriolis force applied to the sensitive tube is proportional to the mass of the fluid flowing through the tube. [0003] The shapes of the sensitive tubes of Coriolis mass flowmeters are various. Among the existing flowmeters, the typical shapes of the sensitive tubes can be classified into three types: curved tubes, straight tubes, and bowed tubes. [0004] Figure 8 It is a structural schematic diagram of a Coriolis mass flowmeter with two parallel U-shaped curved sensitive tubes. Two U-shaped sensitive tubes installed in parallel are equipped with a driving unit 15 in...

AI Technical Summary

Problems solved by technology

This structure alleviates the problem of stress dissipation to a certain extent, and compensates for the shortcoming of the straight tube type that is easily affected by temperature, but the shapes of the inlet and outlet main pipes, the sub-fluids and the pressure-resistant shell are relatively complicated, which increases the difficulty and difficulty of manufacturing the instrument. weight

[0009] Looking at the advantages and disadvantages of the above-mentioned different types of Coriolis mass flowmeters, it can be clearly seen that the main problem lies in the dissipation of vibration energy of the sensitive tube and the relief of stress. Of course, there are also process Convenience and volume reduction, weight reduction and other issues

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