High-precision non-full pipe electromagnetic flowmeter
A technology of electromagnetic flowmeter and partial pipe, which is applied in the field of high-precision partial pipe electromagnetic flowmeter, and can solve the problems of low precision such as flow rate
Pending Publication Date: 2020-07-10
四川中大华瑞能源技术有限公司
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[0037] High-precision part-filled tube electromagnetic flowmeter, this embodiment includes the following parts:
[0038] one sight figure 1 , a non-metallic pipeline 1 is set, and the following components are arranged on the axial length X1 midline XO section of the non-metallic pipeline 1: 1) see figure 2 , on the outer surface of the non-metallic pipe 1 pipe wall, an upper excitation coil 2a is fixed above the vertical Z, and a lower excitation coil 2b is fixed below; a multi-faceted silicon steel sheet closure body surrounding the outer circumference of the non-metallic pipe is provided in the excitation magnetic circuit 3.2) see figure 2 , the vertical center line Zo below the non-metallic pipeline 1 is symmetrically fixed to the left and right in the Y direction with two induction electrodes 4a, 4b, and the circumferential angle between the two induction electrodes is A=60°. One end of each induction electrode passes through the pipe wall hole to be in contact with th...
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The invention discloses a high-precision non-full pipe electromagnetic flowmeter. A non-metal pipe is arranged. An upper magnet exciting coil and a lower magnet exciting coil are fixed on a vertical Zcentral line of the outer wall of the pipeline, and a silicon steel sheet sealing body is arranged on the periphery of the pipeline. A pair of induction electrodes with the included angle A ranging from 0.1 degree to 90 degrees is arranged on the left side and the right side in the Y direction of the pipeline. A thermometer and a grounding electrode are arranged at the bottom of the pipeline. A polar plate layer is closely attached to the inner wall of the pipeline. Two arc-shaped metal polar plate assemblies are symmetrically arranged in the circumferential direction of the vertical center line, the included angle B of each arc-shaped metal polar plate assembly ranges from 180 degrees to A degrees, and the interior of each arc-shaped metal polar plate assembly is formed by optimally configuring a plurality of main polar plates and auxiliary polar plates. An anti-interference large insulation distance is formed between the electrode and the polar plate. A cylindrical insulating liningis paved on the inner wall of the polar plate layer; fluid flows on the inner wall of the lining along the axial direction X; the top converter collects the induced potential and the polar plate dielectric constant and processes the signal to determine the display flow. The non-metal pipeline is connected with an external measured pipeline through flanges at two ends. The accurate dielectric constant is obtained through optimal design and configuration of the polar plates, and the detection precision is greatly improved. The problem of low detection precision of the existing ultrasonic methodand the like is solved. The high-precision non-full pipe electromagnetic flowmeter is used for measuring sewage pipeline water quantity.
Description
[0001] (1) Technical field [0002] The invention relates to a high-precision unfilled pipe electromagnetic flowmeter, which relates to flow measurement and belongs to the G01F category of fluid flow and liquid level measurement. [0003] (2) Background technology [0004] Ordinary electromagnetic flowmeters obtain the flow rate by measuring the average flow velocity with a constant cross-sectional area of the pipe to be measured. The cross-sectional area of the fluid in the partially filled pipe changes with time. Flow measurement not only measures the average flow velocity through the pipe, but also measures the cross-sectional area of the fluid flowing through the pipe. That is to say, the flow measurement of the partially filled electromagnetic flowmeter requires at least two variables of flow velocity V and liquid level H. That is to say, it consists of a flow rate measurement part and a liquid level measurement part. [0005] In order to improve the measurement ac...
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Login to View More IPC IPC(8): G01F1/58
CPCG01F1/58
Inventor 蒋小春
Owner 四川中大华瑞能源技术有限公司