Discussion on Measurement Technology of Electromagnetic Flowmeter

Abstract: The technical information on the measurement of electromagnetic flowmeters is provided by the excellent manufacturers of flowmeters and flowmeters. Abstract: Flow metering is the eye of industrial production. It plays an important role in ensuring product quality, improving production efficiency, and promoting the development of science and technology. The status and role of flowmeters in the national economy are becoming more and more obvious. Flow metering has a wide range of applications. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following are the details of technical articles discussing the measurement of electromagnetic flowmeters. Flow metering is the eye of industrial production. It plays an important role in ensuring product quality, improving production efficiency, and promoting the development of science and technology. The status and role of flowmeters in the national economy are becoming more and more obvious. Wide range of applications for flow measurement Flow measurement is widely used in industrial and agricultural production, national defense construction, scientific research, foreign trade, and various fields of people's life. In the production of petroleum industry, from oil extraction, transportation, smelting and processing to trade sales, flow measurement runs through the whole process, and any link is inseparable from flow measurement. Otherwise, the normal production and trade exchanges of the oil industry will not be guaranteed. In the chemical industry, inaccurate flow measurement will cause imbalance in the distribution ratio of chemical components, unable to guarantee product quality, and serious production safety accidents will occur. In the production of electric power industry, the measurement and adjustment of the flow of liquid, gas, steam and other media play an important role. The accuracy of flow measurement is not only of great economic significance to ensure that power plants operate under optimal parameters, but also with the development of high-temperature, high-pressure and large-capacity units, flow measurement has become an important link to ensure the safe operation of power plants. If the instantaneous water flow of large-capacity boilers is interrupted or reduced, it may cause serious dry boiler or pipe burst accidents. This requires that the flow measurement device should not only measure accurately, but also issue an alarm signal in time. In the production of iron and steel industry, the flow measurement of circulating water and oxygen (or air) in the steelmaking process is one of the important parameters to ensure product quality. In light industry, food, textile and other industries, flow measurement is also inseparable. In agriculture, such as farmland water conservancy, meteorological wind speed, and even some agricultural machinery, such as motor sprayer, water pump characteristic test, also need flow measurement. In national defense construction, with the development of space technology, very high requirements are put forward for flow measurement. For example, the nuclear power control of spaceships and nuclear submarines is inseparable from the flow meter; a large amount of liquefied fuel is negatively charged for a rocket dynamometer test run. If the flow rate is not accurate, not only will the economic loss be huge, but the range will also deviate from thousands of kilometers; chemical protection equipment Flow meters are also indispensable; some military projects even use thousands of flow meters. In scientific research and foreign trade, flow measurement also occupies an important position and role. Tap water, gas, natural gas, oil, etc., which are closely related to people's daily life, are widely measured by flow meters. The content of flow measurement is that flow is a dynamic quantity, and flow measurement is a complex technology. In terms of the measured fluid, it includes three kinds of fluids with different physical properties: gas, liquid and mixed fluid; in terms of the conditions for measuring fluid flow, it is also diverse, such as the temperature during measurement can range from high temperature to At extremely low temperature, the pressure during measurement can be from high pressure to low pressure; the size of the measured flow can be from a small flow to a large flow; the flow state of the measured fluid can be laminar flow, turbulent flow, etc. In addition, as far as liquids are concerned, there are also situations such as different viscosities. Therefore, in order to measure the flow accurately, it is necessary to study the flow measurement methods of different fluids under different conditions, and provide corresponding measuring instruments. This is one of the main jobs of flow metering. Because the characteristics of the fluid to be measured are so complex and the measurement conditions are different, various measurement methods and measurement instruments have been produced. Obviously, if there is no uniform method for verifying the accuracy of flow measuring instruments, it is impossible to ensure the process requirements of mass production and the equal exchange of trade. In addition, there must be a set of flow unit reproduction methods and a standard method for calibrating the system to be delivered using small flow meters. Another main content of flow metrology is: to study the discovery method and verification system of flow units, and to establish the basis and standard device for flow measurement, so as to ensure the accuracy of quantity value transfer and flow measurement. Before the flowmeter leaves the factory or is used, its measurement performance must be tested or verified to ensure product quality and accuracy of use. to this end,It is necessary to establish a standard device that reproduces the magnitude of the flow unit. The so-called flow standard device refers to a measuring device that can provide a certain accurate flow value. As for the structure, principle, technical requirements and verification methods of various flow standard devices, this site will have detailed information to explain. A brief history and prospect of flow measurement Flow measurement has been a symbol of human civilization since ancient times. The Egyptians used the Nile flowmeter to predict good or bad years. The ancient Romans built canals to divert water and used orifice plates to measure the flow. However, due to economical production, until the 1950s, the main flowmeters used in the industry were only orifice and float flowmeters. The range of the measured medium is also narrow, and the measurement accuracy only meets the needs of low-level production.
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