Wide-range precession vortex gas flow meter

Abstract

The invention belongs to the technical field of a gas flow meter, and in particular relates to a wide-range precession vortex gas flow meter, which comprises a venturi-shaped shell, a vortex generator, a despinner, a pressure sensor, a flow sensor and an integrating instrument, wherein the vortex generator and the despinner are respectively arranged at the head end and the tail end of the shell; the pressure sensor and the flow sensor are arranged on the inner wall of the shell; the integrating instrument comprises a microprocessor and a signal acquisition unit; the pressure sensor is connected with the signal acquisition unit; the inner wall of the shell is also provided with a thermal acceleration sensor; the integrating instrument is internally provided with a gating circuit connected with the microprocessor; and two input ends of the gating circuit are connected with the flow sensor and the thermal acceleration sensor at the same time. According to the wide-range precession vortex gas flow meter, the thermal acceleration sensor is arranged in the existing precession vortex gas flow meter, the gating circuit is arranged in the integrating instrument for integrating the flow sensor and the thermal acceleration sensor, and the work of the different sensors can be controlled by the microprocessor according to the flow rate, so that the measuring range of the flow sensor can be expanded.

Description

technical field [0001] The invention belongs to the technical field of gas flowmeters, in particular to a wide range precession vortex gas flowmeter. Background technique [0002] At present, various gas flow metering instruments produced by mainstream flow meter manufacturers in the world have limitations in the flow measurement range of a single meter due to the measurement principle. The general range is around 1:30, only the thermal gas flowmeter and Roots flowmeter have a relatively wide range, generally around 1:200. Moreover, because the airflow velocity in the gas pipeline is often too fast or too slow, which exceeds the flow rate range that the instrument can measure, the airflow beyond the measurement range cannot be accurately recorded by the flow meter, especially if it is less than the lower limit of the range. In some cases, even sometimes the flow value cannot be recorded at all. [0003] In order to solve the above problems, people have been studying wide-r...

AI Technical Summary

Problems solved by technology

Although this method partially solves the problems existing in the existing metering instruments, since the flow signal output of the meter and the action of the control valve both require a buffer time, this brings problems to the accurate measurement of the air flow, which in turn creates a problem for the air supply side. It has caused a lot of inconvenience to the user, and also caused a great waste of raw materials and installation sites, which conflicts with the world's mainstream concept of energy conservation and environmental protection

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