Flow detection method based on plug-in electromagnetic flowmeter
An electromagnetic flowmeter and flow detection technology, which is applied in the application of electromagnetic flowmeters to detect fluid flow, volume/mass flow generated by electromagnetic effects, etc. The effect of formulating, reducing errors, and improving detection accuracy
Active Publication Date: 2019-09-10
CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
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However, in practical applications, the method of replacing the average flow velocity of the current detection with the flow velocity at a certain point will bring serious errors to the final detection results, resulting in low accuracy of the detection results, which is not conducive to guiding production as a guiding parameter in actual production. decision making
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[0016] figure 1 It is a schematic diagram of the laminar flow velocity distribution of the fluid in the circular pipeline of the present invention. As shown in the figure, the flow detection method based on the insertion flowmeter provided by the present invention includes:
[0017] Detecting the flow velocity distribution state of the liquid in the circular pipe 1 under the laminar flow state, and determining the liquid laminar flow state curve according to the flow velocity distribution state;
[0018] Arrange at least three flow velocity detection points 2 on the plug-in electromagnetic flowmeter, and solve the liquid laminar flow state curve according to the flow velocity value output by the flow velocity detection point 2;
[0019] The area enclosed by the intersection line between the flow measurement state curve and the inner wall of the pipeline 1 and the laminar flow state curve is obtained as the average flow rate of the liquid in the pipeline, and the insertion elec...
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The invention provides a method for detecting flow based on a plug-in electromagnetic flowmeter. The method comprises the following steps: detecting the flow velocity distribution state of liquid in a round pipeline under a laminar flow state, and determining a liquid laminar flow state curve according to the flow velocity distribution state; arranging at least three plug-in electromagnetic flowmeters, and resolving the liquid laminar flow state curve according to the flow of flow detection points output by the electromagnetic flowmeters; and solving the area enclosed by the intersection linking between the laminar flow state curve and the inner wall of the pipeline with the laminar flow state curve to serve as the liquid average flow of a pipeline. According to the method, the average flow velocity of the liquid in the pipeline can be detected to obtain accurate measurement, error of a final flow result can be effectively reduced, the detection accuracy can be improved, and correct formulation of production decision making in actual production can be benefited.
Description
technical field [0001] The invention relates to a flow detection method, in particular to a flow detection method based on an insertion electromagnetic flowmeter. Background technique [0002] In a circular pipeline, a plug-in electromagnetic flowmeter is generally used for the flow of liquid. First, the flow velocity of a certain detection point in the pipeline is detected by the electromagnetic flowmeter as the average flow velocity of the current detection, and the product of the cross-sectional area of the pipeline and the flow velocity is used as Current flow value. However, in practical applications, the method of replacing the average flow velocity of the current detection with the flow velocity at a certain point will bring serious errors to the final detection results, resulting in low accuracy of the detection results, which is not conducive to guiding production as a guiding parameter in actual production. decision making. [0003] Therefore, it is necessary t...
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IPC IPC(8): G01F1/58
Inventor 刘亚辉谭凯张加易游青山饶兴鑫赵光绪林引张金豪胡亮邵严郭江涛孟小红田炎鑫
Owner CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD