Integrated intelligent flowmeter and measuring method

Abstract

The invention provides an integrated intelligent flowmeter and a measuring method. The integrated intelligent flowmeter comprises a measuring tube, an upstream pressure sensor component, a downstream pressure sensor component, a mounting bracket, a computer data processing unit, an upstream flowing regulator, a built-in core, a downstream flowing regulator and a temperature sensor. By using an inner Venturi tube as a throttle member, the accuracy and stability of measurement are improved; simultaneously, a plurality of pressure sensors are used for collecting pressure signals, an integrated data processing computer performs analog-digital conversion, software filtering, average value calculation and flow velocity and flow calculation on the pressure signals, the pressure signals after temperature compensation are converted into industrial standard digital signals or industrial standard current signals of 4 to 20mA to be output wirelessly or with wires; the invention can realize long-term stable and accurate on-line metering, especially has unique metering advantages at a situation that a long straight pipe section cannot be installed in site.

Description

technical field [0001] The invention belongs to the technical field of the IT industry, and in particular relates to an integrated intelligent flow meter and a measurement method. Background technique [0002] At present, in the field of domestic industrial flow measurement, orifice plates, nozzles and Venturi tubes are commonly used as differential pressure flowmeters as throttling devices. There must be a certain length of straight pipe section; and in many occasions, there are T-shaped pipes, L-shaped elbows, valves, variable diameter pipes and other components distributed within a very limited distance. Due to the limitation of installation space, the upstream and downstream of the throttle The straight pipe section is very short, which causes great disturbance of the fluid in the measurement section, making it very difficult to measure the fluid accurately in this case. The traditional differential pressure flowmeter also has unstable outflow coefficient, poor linearit...

AI Technical Summary

Problems solved by technology

[0002] At present, in the field of domestic industrial flow measurement, orifice plates, nozzles and Venturi tubes are generally used as differential pressure flowmeters as throttling devices. There must be a certain length of straight pipe section; and in many cases, there are T-shaped pipes, L-shaped elbows, valves, variable diameter pipes and other components distributed within a very limited distance. Due to the limitation of installation space, the upstream and downstream of the throttle The straight pipe section is very short, resulting in great disturbance of the fluid in the measurement section, making it very difficult to measure the fluid accurately in this case

The traditional differential pressure flowmeter also has unstable outflow coefficient, poor linearity, poor repeatability, low accuracy due to many factors, easy to wear, large pressure loss, small range ratio (range), and field installation. Disadvantages such as the required straight pipe section is too long

Images