A shaftless liquid turbine flowmeter with a self-powered meter head

Abstract

The invention discloses a shaftless liquid turbine flow meter with a self-powered meter head. The liquid turbine flow meter comprises an outer shell, an inner shell and the meter head, the inner shellis coaxially installed in the outer shell, and a relatively free rotating pair is formed between the inner shell and the outer shell; the outer shell and the inner shell are provided with a first port and a second port which are used for a fluid to flow in and out and are coaxially formed; a shaftless impeller is arranged in the inner shell, and a magnet is arranged on the outer surface of the inner shell; a coil capable of cutting the magnetic induction line of the magnet is arranged in the outer shell, the coil is connected with the interior of the meter head through a wire; the meter headcomprises a conversion circuit, the conversion circuit is used for converting induction current of the coil into a measurable potential and supplying power to the meter head, and the flow of the fluidis measured by measuring the induced current and potential of the coil. The symmetrical shaftless impeller is used, so that the flow direction of the fluid is not limited, the resistance of fluid flowing is reduced, and measurement is more accurate; current generated through electromagnetic induction can also supply power to the meter head, and an external power source does not need to be added to the meter head.

Description

technical field [0001] The invention belongs to the field of measuring instruments, and relates to a liquid flowmeter, in particular to a shaftless liquid turbine flowmeter with a self-powered meter head. Background technique [0002] (1) Characteristics of liquid turbine flowmeter [0003] Liquid turbine flowmeter is a speed-type measuring instrument with high measurement accuracy, fast response speed, wide measurement range, small pressure loss, wide flow range ratio, high accuracy, good anti-vibration and anti-pulsation flow performance, low price, It is widely used in industrial production due to the advantages of convenient installation. Liquid turbine flowmeters are widely used in petroleum, chemical industry, electric power, building water supply and drainage, central air conditioning and other fields, and are also widely used in trade measurement. For liquid turbine flowmeters, improving its quality is crucial. [0004] (2) Working principle of liquid turbine flow...

AI Technical Summary

Problems solved by technology

[0011] These optimization technologies have reduced the resistance of the fluid in the flow process to a certain extent and improved the measurement accuracy of the turbine flowmeter, but they have not realized the miniaturization and integration of the flowmeter design.

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