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2021

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09

Application of Flowmeter

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  The flowmeter is widely used in industrial and agricultural production, national defense construction, scientific research, foreign trade and people's life. From oil industry production to oil exploitation, transportation, smelting to trade sales, flow measurement runs through the whole process, and no part can be separated from flow measurement. Otherwise, the normal production and trade of the oil industry cannot be guaranteed. Inaccurate flow measurement in the chemical industry will lead to the imbalance of chemical composition distribution fees, which cannot guarantee the product quality, and in serious cases, production safety accidents will occur. In the production of electric power industry, measuring and controlling the flow of liquid, gas, steam and other media plays an important role. The accuracy of flow measurement is not only of great economic significance to ensure the operation of the power plant under good parameters, but also becomes an important part of ensuring the safe operation of the power plant with the development of high temperature, high pressure and large capacity devices.

流量计

  

If the instantaneous water supply flow of large capacity boilers is interrupted or reduced, serious dry boiler or explosion accidents may occur. Therefore, the flow measuring device should not only measure accurately, but also send alarm signals 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. Light industry, food, textile and other industries are also inseparable from flow measurement.

The converters used in many flowmeter applications are external clip and plug type. Single ultrasonic flowmeter is simple in structure and convenient to use, but its adaptability to the distribution of convection state is poor. The rapid development of microelectronics and computer technology has greatly promoted the replacement of instruments, and new types of flowmeters have sprung up like mushrooms. It is reported that hundreds of flowmeters have entered the market so far, and it is expected that many difficult problems in field use will be solved. Modern flow measurement technology was developed relatively late in China. In order to measure the upstream of flow channel 6, fluid flow into holes 11 and 12 measured based on holes 11 and 12 was reduced. The measurement control part 19 measures the ultrasonic propagation time between the ultrasonic transducers 8 and 9. The calculation section 20 calculates the flow according to the signal of the measurement control section 19.

The flowmeter shall avoid ferromagnetic objects and equipment with strong electromagnetic field (such as large motor, large transformer, etc.) as far as possible, so as to avoid magnetic field affecting the working magnetic field and flow signal of the sensor. Flow signal line and magnetic field line between sensor spoon converters. However, the analysis of the damaged components in the lightning fault shows that most of the perceived high voltage and surge current causing the fault come from the power lines in the control room, and the other two paths are less. Electromagnetic flowmeter has much more opportunities to measure suspended solids or sludge than other flowmeters, so the probability of occurrence of inner wall adhesion layer is relatively high. If the conductivity of the adhesive layer is similar to that of the liquid. General errors during debugging are usually not suitable for installation.

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