Description
The vortex flowmeter is mainly composed of a vortex generator, a frequency detector, a signal converter and other parts.
The vortex generator is a key component. It is usually placed vertically in the pipeline. When the fluid flows through it at a certain flow rate, regular vortices will be generated alternately on both sides, which is what we call the Karman vortex street. It is the key trigger point for the entire flow measurement. Its shape, size and other geometric parameters have a close impact on the flow characteristics of the vortex flowmeter. Common shapes include triangles, circles, rectangles, etc., and the vortex effects generated by different shapes are different.
The role of the frequency detector is to be able to keenly capture the frequency of the vortex generated by the vortex generator. For example, some detectors are made of thermal, stress, strain, capacitance, photoelectric, ultrasonic and other technologies. They can accurately sense the periodic vibration signal generated by the vortex and convert it into an electrical signal, thereby providing a key data basis for subsequent flow calculations and ensuring the accuracy of the measurement.
The signal converter is mainly responsible for processing the electrical signal transmitted by the frequency detector. It will amplify, filter, and shape the signal, and then convert it into a pulse signal or a two-wire 4-20mA current signal according to actual needs. These processed signals can be easily used by secondary instruments or control systems to achieve effective measurement and monitoring of fluid flow, so that the measurement results can be presented intuitively, which is convenient for operators to record and analyze.
Advantages
1. High-precision measurement
The vortex flowmeter has excellent high-precision measurement performance when measuring working volume flow, and is almost unaffected by fluid density, pressure, temperature, viscosity and other parameters. This means that under different working conditions, it can stably and accurately measure the flow of the fluid.
2. Low maintenance cost
The convenience of vortex flowmeter maintenance is mainly due to its own structural characteristics. It has no movable mechanical parts, which greatly reduces the potential faults caused by long-term wear and tear of mechanical parts, making it more reliable. In addition, the sensor does not directly contact the measured medium, avoiding problems such as erosion and clogging of the sensor by the medium.
3. Small pressure loss
Compared with some other types of flow meters, vortex flow meters will not cause a significant drop in fluid pressure. It can reduce operating costs, because small pressure loss means that there is no need to invest too much extra energy to make up for the pressure difference, which has an energy-saving effect. At the same time, it also helps to improve the stability of the entire system operation, and will not affect the normal operation of other related equipment due to factors such as large pressure fluctuations, thus ensuring the smooth development of the process.
Application case
Petrochemical Industry: In the complex production process of an oil refinery, vortex flowmeters play a stable role in the process of crude oil transportation through pipelines, refining, and subsequent transportation of petroleum products. With their high-precision measurement capabilities, they provide real-time feedback on flow data, ensuring precise control of material delivery volume in each link, making the production process more refined and effectively optimized.
Metallurgical Industry: In the metallurgical production process, such as blast furnace ironmaking, it is necessary to accurately control the amount of oxygen and other gases introduced. The vortex flow meter measures the gas flow in real time and provides accurate data to the operator, thereby realizing scientific management and strict control of the medium flow in the production process, ensuring that metallurgical reactions such as ironmaking can be carried out stably and efficiently, and helping to optimize the entire production process, reduce energy consumption, improve product quality, and ensure that the entire metallurgical production process is carried out in an orderly manner.
Power Industry: In thermal power plants, for boiler steam flow measurement, vortex flowmeters can monitor the steam flow in real time to ensure that the steam supply is stable and meets power generation needs, so that power generation equipment such as steam turbines can operate normally and maintain safe and stable operation of the power generation process; and in terms of cooling water flow measurement, accurate control of cooling water flow helps to reasonably control the cooling effect, avoid equipment failures due to overheating and other problems, ensure the efficient operation of the entire cooling system, and thus improve the overall operating efficiency of the power plant. Similarly, in hydroelectric power plants, vortex flowmeters can also reliably measure the flow of related media such as water flow, help the power generation process go smoothly, and ensure stable power output.
Environmental protection industry: As environmental protection requirements become increasingly stringent, the role of vortex flowmeters in the environmental protection industry has become increasingly prominent. In terms of emission monitoring, it can be used to measure the emission flow of various pollutants in the production process of enterprises, such as monitoring of wastewater emissions and exhaust gas emissions; in flue gas emission measurements, vortex flowmeters can accurately obtain flue gas flow data, helping enterprises to clearly understand their own pollutant emissions, and then take corresponding measures based on these data to accurately control pollutant emissions to meet environmental protection requirements, help the effective implementation of environmental management, and contribute to protecting the ecological environment.
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