Application and development trend of flow meter

Abstract: The application and development trend information of flow meter is provided by excellent flow meter and flow meter production and quotation manufacturers. The application of flow meter and its development trend The flow detection element or flow sensing element (sensor) may sense other variables in addition to the flow rate, and derive other functions from it, which can simplify the process detection system, reduce the number of instruments and connect pipelines , . More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the details of the application of flowmeters and their development trends. The application of flow meter and its development trend The flow detection element or flow sensing element (sensor) may sense other variables in addition to the flow rate, and derive other functions from it, which can simplify the process detection system, reduce the number of instruments and connect pipelines ,lower costs. The reduction of process piping openings reduces potential leak failures. Electromagnetic flowmeter, non-full pipe electromagnetic flowmeter must measure the liquid height in the pipe while measuring the average flow rate. Two excitation windings are connected in series in the forward and reverse directions, respectively, to generate two flow velocity signal potentials measured under different magnetic field strengths and magnetic field distributions. The ratio between the two potentials has a certain functional relationship with the liquid level height. Vortex flowmeter, the vortex frequency of the vortex generator separation is proportional to the flow rate. Ultrasonic flowmeter, ultrasonic mass flowmeter attempts to measure the second parameter liquid acoustic impedance and density by ultrasonic on the basis of the propagation time method ultrasonic volumetric flowmeter, and calculate the mass flow rate. Application Progress In a certain field where the application of mature instruments is restricted, after a breakthrough in technology, a corresponding improved instrument has been developed, which has led to rapid development in this field. The following discusses the progress of several flow instrument application fields. 1. The electromagnetic flowmeter is not a full-pipe electromagnetic flowmeter. The traditional electromagnetic flowmeter can only measure the liquid flow in a full-pipe. The non-full-pipe electromagnetic flowmeter is used in the field of sewage discharge with free surface natural flow and improves the measurement accuracy in this field. . Convert traditional partial pipe flow or open channel flow error from±(3 to 5) %FS is reduced to±(1～2)%FS. Liquids with lower point conductivity can now be measured 2 to 3 orders of magnitude lower than the conductivity threshold of traditional electromagnetic flowmeters, such as glycerol, ethylene glycol, etc. that could not be measured before. In addition, this type of meter has almost no slurry noise and flow noise, and no noise caused by electrode surface effects. Covering the inner surface of the liner with a non-conductive layer such as grease or a thin layer of insulating scale will not affect the measurement. Low power consumption and two-wire electromagnetic flowmeters have developed rapidly. The two-wire system does not require an external excitation circuit, and only 4mADC current is used to provide the power required by the meter, usually only tens of milliwatts. The low-power electromagnetic flowmeter makes it possible to use dry batteries or solar cells, and it is more convenient to install the electromagnetic flowmeter in places where there is no mains power supply. Two-dimensional (direction) electromagnetic flowmeter and multi-measurement point insertion electromagnetic flowmeter, the ship electromagnetic speedometer placed outside the hull is the prototype of the insertion electromagnetic flowmeter. Later, the plug-in electromagnetic flowmeter has been greatly developed in large and medium-sized pipelines, and is also used in open channels, which is called electromagnetic current meter. But in a river flow or hydraulic test model, not only the flow velocity but also the flow direction must be known. The two-dimensional electromagnetic flow meter, also known as the vector flow meter, enables the family of electromagnetic flow meters to enter the field of hydrological test applications. In addition, the plug-in electromagnetic flowmeter also refers to the design idea of ​​the uniform tube, and sets multiple sets of electromagnetic flow rate measurement units on the insertion rod to improve the measurement accuracy, so that the plug-in electromagnetic flow meter is in a favorable position in the application of large pipes. 2. Thermal mass flowmeters Thermal mass flowmeters were mainly thermally distributed in the past, and were used in the measurement of small gas flows. They were mostly used in the semiconductor industry, heat treatment furnaces, analytical instruments, etc. for flow measurement and control of hydrogen, oxygen, ammonia, etc. Determination of leakage during valve manufacturing, etc. In recent years, the application of intrusive and plug-in thermal flowmeters with heat dissipation effect abroad, environmental protection and large and medium-sized pipelines in the process industry have developed rapidly. The detection rod composed of multiple sets of detection elements arranged in radial segments is mostly used in large and medium-sized pipelines in HVAC (heating ventilation and air conditioning) projects; it is also used for monitoring SO2 and NOX in large ducts of boilers and flue exhaust. total emissions. Although the micro liquid mass thermal flowmeter has a history of more than 20 years, its industrial application has not developed rapidly until recent years. Now several manufacturers have produced various types of thermal distributed thermal flowmeters and put them into the market. At present, it is mainly used in experimental devices in chemical, petrochemical, food and other process industries. For example: the constant flow ratio control in the liquid medicine ratio system, and the liquid flow measurement and control in the process of liquefied gas injection. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Application and Development Trend of Flow Meter'

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