Magnetic vortex street flowmeter

A vortex flowmeter, electromagnetic technology, applied in the field of flowmeter, can solve the problems of high production cost, affecting the measurement result, affecting the normal generation of eddy current, etc., and achieve the effect of reducing production cost and accurate small flow rate

Inactive Publication Date: 2006-09-13
滁州市金科仪器仪表有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0003] 1. Axial beating effect: Because many flowmeters are mostly connected to the pump body when they are in use, due to the large vibration of the pump, they will vibrate up and down, left and right, causing the flow tube 1 of the flowmeter to vibrate, so it also affects The normal generation of eddy current affects the measurement results;
[0004] 2. Small flow rate is not very accurate: due to the small eddy current generated at low flow rate, the value of the induction signal generated by the sensor is inconsistent, resulting in inaccurate measurement of small flow rate;
[0005] 3. The signal acquisition system is composed of triangular columns and sensors, and the production cost is high

Method used

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Experimental program
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Embodiment

[0021] see figure 2 , image 3 , in the flow tube 1, set the triangular column 2 as usual, set the probe 3 on the back of the triangular column 2, set the permanent magnet 4 outside the flow tube 1 corresponding to the position of the probe 3, and use the probe 3 and the permanent magnet 4 constitute a signal sensor.

[0022] In specific implementation, the probe 3 is a needle-shaped conductor, suspended vertically in the center of the flow tube 1, the tail of the probe 3 is placed outside the flow tube 1, and connected to the terminal 7 by threads, and the detection signal is in the terminal 7 lead out.

[0023] According to the principle of Karman vortex street, when there is fluid flowing through the flow tube 1, due to the existence of the triangular column 2, resistance will be generated to divert the fluid, so an eddy current will be generated in front of the probe 3; at the same time, due to the permanent magnet 4 at this position If it exists, a strong magnetic fie...

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PUM

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Abstract

A vortex street flowmeter of electromagnetic type is featured as setting triangular column in flow tube, setting probe at back of triangular column, setting permanent magnet at flow tube external certain position corresponding to said probe for structuring signal transducer by probe and permanent magnet, applying needle form conductor as probe being suspended vertically at center of flow tube, setting probe tail portion at outside of flow tube and connecting it to wiring terminal used to lead out detection signal.

Description

Technical field: [0001] This invention relates to metering, and more particularly to a flow meter. Background technique: [0002] Vortex flowmeters are used in the detection of liquid flow, and are widely used in petroleum, chemical, food, pharmaceutical, smelting and other industries at home and abroad. The traditional vortex flowmeter consists of a flow tube 1, a triangular column 2, a sensor 8, a signal processing system 5, and a display 6. Its structural principle is as follows: figure 1 As shown, according to the Karman vortex street principle, when there is fluid flowing in the flow tube 1, due to the existence of the triangular column 2, resistance will be generated, and the fluid will be shunted. In this way, an eddy current will be generated in front of the sensor 8, and the sensor 8 will be induced by the eddy current. Signals, and transmit their quantity to the signal processing system 5, after analysis and calculation, it will be displayed in digital form on the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/32G01F1/56
Inventor 杨长春
Owner 滁州市金科仪器仪表有限公司
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