Movable guide rail type flowmeter

Abstract

The invention discloses a movable guide rail type flowmeter. The movable guide rail type flowmeter comprises a left shell and a right shell, the left shell and the right shell are communicated in a sealed mode through a middle shell, a left metering unit is arranged in the left shell, a right metering unit is arranged in the right shell, a liquid is fed and discharged from the left shell through the left metering unit, and a liquid is fed and discharged from the right shell through the right metering unit; and a measured fluid flow channel is separated from a moving part through a sealing component; a Hall element is arranged on the outer wall of the middle shell, magnetic steel inducting the Hall element is arranged in the middle shell, and a central processing unit receives pulse electric signals sent by the Hall element and calculates flow according to the pulse electric signals. The problem of overlarge inlet and outlet pressure drop of an existing volumetric flowmeter is solved, and the beneficial effects of reducing the pressure drop of the inlet and outlet of the flowmeter, balancing the flow pulsation of a liquid outlet, reducing the internal leakage of the flowmeter, improving the measurement precision and reducing the volume of the flowmeter are achieved.

Description

technical field [0001] The invention relates to a flow meter, in particular to a movable guide rail type flow meter. Background technique [0002] In the field of flow measurement, positive displacement flowmeters have high measurement accuracy and are less affected by the environment, making them widely used in aerospace ships, chemical engineering, mechatronics and other fields. As a kind of positive displacement flowmeter, piston flowmeter is divided into two types: reciprocating piston flowmeter and rotary piston flowmeter. [0003] Reciprocating piston flowmeters have high measurement accuracy and are often used in automobile gas stations. However, if only a single reciprocating piston is used to measure flow, there will be flow pulsation problems. The current method of smoothing flow pulsation is to use multi-piston flowmeters, but the measured The fluid needs to push multiple pistons, which will consume more fluid kinetic energy, resulting in an excessive pressure dr...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present application provides a movable guide rail type flowmeter to solve the problem of excessive pressure drop at the inlet and outlet of the existing positive displacement flowmeter, realize the reduction of the pressure drop at the inlet and outlet of the flowmeter, and calm the liquid outlet The beneficial effects of flow pulsation, reducing the internal leakage of the flowmeter, improving the measurement accuracy and reducing the volume of the flowmeter

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