Bingham fluid flow detection instrument

Abstract

The invention discloses a Bingham fluid flow detection instrument. The instrument comprises a high-pressure gas cylinder, a control valve, a gas ejector pipe, a flow pipeline, photoelectric sensors, a data acquisition card, a computer, a capacitive pressure transmitter, a gas flowmeter and a gas buffer tank, wherein the high-pressure gas cylinder, the gas flowmeter, the gas buffer tank, the gas ejector pipe and the flow pipeline are sequentially connected, the control valve and the capacitive pressure transmitter are mounted outside the gas buffer tank, and the control valve is arranged between the gas ejector pipe and the flow pipeline; and the two photoelectric sensors are mounted outside the flow pipeline, the photoelectric sensors and the capacitive pressure transmitter are connected with the data acquisition card, and the data acquisition card is connected with the computer. The instrument can be used for researching the flow of Bingham fluid, well observing the flow pattern of the fluid in the pipe, scientifically determining the corresponding yield stress and be applied to detection of physical properties of printing ink and high-viscosity petroleum in China.

Description

technical field [0001] The invention relates to a fluid detection instrument, in particular to a Bingham type fluid flow detection instrument. Background technique [0002] Inks widely used in the printing industry, crude oil extracted from the petroleum industry, etc., are all non-Newtonian viscous fluids in terms of rheological properties, usually Bingham fluids, that is, there is a flow starting pressure, also known as the minimum yield stress, Because these fluids are generally transported by pipelines, the determination of the starting flow resistance is very important in scientific research and engineering practice. [0003] When the Bingham fluid is in a static state, a certain external force must be used to overcome the relatively large starting resistance, so that the main body of the ink can slip. When the ink flows stably in the straight tube, like a coherent plug body, the radial velocity gradient du / dr across the plug body is zero, and all friction is limited t...

AI Technical Summary

Problems solved by technology

[0008] Existing Bingham-type fluid detection test instruments are complicated to operate and expensive, so it is particularly important to design and research scientific instruments that are simple in operation, accurate in measurement, and low in cost for testing Bingham-type fluid flow.

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