Introduction of Different Flow Meters According to Measurement Methods

Abstract: The introduction information of different flowmeters according to the measurement method is provided by the excellent flowmeter and flowmeter manufacturers and quotation manufacturers. Flowmeter classification The dynamic parameters of fluid flow. Such as velocity, momentum, etc. are directly related to flow. Hence the various physical effects caused by these parameters. Both can be used as the physical basis for flow measurement. At present, there are many types of flowmeters that have been put into use. More flowmeter manufacturers select models and price quotations. You are welcome to inquire. The following is the introduction article details of different flowmeters according to the measurement method. The flow meter classifies the dynamic parameters of fluid flow. Such as flow velocity, momentum, etc. are directly related to flow. Hence the various physical effects caused by these parameters. Both can be used as the physical basis for flow measurement. At present, there are many kinds of flowmeters that have been put into use, and their measurement principles, structural characteristics, scope of application and use methods are different, so their classification can be divided according to different principles. So far, there is no unified classification method, according to the measurement method According to the measurement method, the flow rate measuring instrument can be generally divided into three types: volume method, velocity method (velocity method) and mass flow method. a Volume method The volume method refers to a method of continuously measuring the fluid to be measured with a container with a standard volume, and calculating the flow rate by the number of standard volumes measured in a unit (or a period of time) time. This measurement method is less affected by the flow state. Therefore, it is suitable for measuring fluids with high viscosity and low Reynolds number. But it is not suitable for measuring the flow rate of high temperature and high pressure and dirty medium. Its flow measurement upper limit is small. Typical instruments include oval gear flowmeters, waist wheel flowmeters, scraper flowmeters, etc. b Velocity method Velocity method refers to the method of calculating the flow rate according to the average flow velocity on the pipe section. Various physical phenomena related to flow velocity can be used to measure flow. If the density of the fluid to be measured is measured again, the mass flow rate can be obtained. Among the velocity method flowmeters, the throttling flowmeter has a long history and the most mature technology. It is the most widely used flowmeter in industrial production and scientific experiments. In addition, the flowmeters that belong to the velocity method include rotor flowmeters, turbine flowmeters, electromagnetic flowmeters, ultrasonic flowmeters, etc. Since this method uses the average flow velocity to calculate the flow, it is greatly affected by the pipeline conditions. Such as Reynolds number, eddy current and asymmetric velocity distribution in the section will bring errors to the measurement. However, this measurement method has a wide range of conditions of use. It can be used for the measurement of high temperature and high pressure fluids. Some instruments are also suitable for measuring the flow of dirty media. At present, instruments that use the velocity method for flow measurement are widely used in industry. C mass flow method, whether it is volume method. Or velocity method. The density of the fluid must be given to get the mass flow. The density of the fluid is affected by the fluid state parameters (recession, pressure). This inevitably brings errors to the measurement of mass flow. One way to solve this problem is to measure the volume flow and density of the fluid at the same time or to compensate the change of the fluid density according to the measured state parameters such as the pressure and temperature of the fluid. But a more ideal method is to directly measure the mass flow of the fluid. The physical basis of this method is to measure the physical quantities related to the mass of the fluid (such as momentum, moment of momentum, etc.) to directly obtain the mass flow. This method has nothing to do with the composition and parameters of the fluid. It has obvious advantages. However, the flow meters currently produced are relatively complex. expensive. Therefore, their application is limited. Flow is a dynamic quantity. Its measurement process is related to the fluid flow state, the physical properties of the fluid, the working conditions of the fluid, and the length of the straight pipe sections before and after the flowmeter. Therefore, to determine the flow measurement method and select the flow meter, the influence of the above factors must be comprehensively considered in order to achieve the ideal measurement requirements. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Introduction to Different Flow Meters According to Measurement Methods'

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