What is Flow Meter Used for?
Flow meter is an instrument used to measure the flow of fluids in pipelines or open channels. It measures various media, including gas, liquid, slurry, and steam. In the field of automation, flowmeters play an important role as front-end instruments. Each product of flow meter not only has its specific applicability, but also has its limitations. According to the measurement object, there are two categories of closed pipes and open channels; according to the purpose of measurement, it can be divided into total measurement and flow measurement. The instrument are called total meter and flow meter respectively.
The flow meter can not only monitor the flow of the medium in real time, but also can feed back the information to the automation system, and the system can carry out subsequent data analysis and related automation control work. The automation of flow meter has greatly reduced a lot of manpower and material resources in many industrialized enterprises.
The role of the flow meter is very wide: It is 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 the exploitation, transportation, smelting, processing and trade sales of petroleum, flow measurement runs through the whole process. Any link is inseparable from the flow measurement, otherwise the normal production and trade exchanges of the petroleum industry will not be guaranteed.
In the chemical industry, if the flow measurement is inaccurate, the distribution ratio of chemical components will be unbalanced. Then the product quality cannot be guaranteed, and serious production safety accidents will occur.
In the production of electric power industry, the flow meter plays an important role in the measurement and regulation of the flow of liquid, gas, steam and other media. The accuracy of flow measurement is not only of great economic significance to ensure the operation of power plants under the best parameters, but also with the development of high-temperature, high-pressure and large-capacity units, flow measurement has become an important part of ensuring 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 a timely manner.
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.
When using the flowmeter, try to avoid ferromagnetic objects and equipment with strong electromagnetic fields (such as large motors, large transformers, etc.) to prevent the magnetic field from affecting the working magnetic field and flow signal of the sensor. From the analysis of the damaged parts in the lightning fault, most of the induced high voltage and inrush current caused by the fault are introduced from the power circuit of the control room. Since the magnetic flow meter has more opportunities to measure suspended solids or dirt than other flowmeters, the probability of failure of the inner wall adhesion layer is relatively high.