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The industrial principle and application fields of Weiliba flowmeter
The Velbar flowmeter is suitable for high-precision flow measurement of gases, liquids, and vapors
Product details
The Velbar flowmeter is suitable for high-precision flow measurement of gases, liquids, and vapors. Weiliba is a differential pressure and rate averaging flow sensor that measures flow by measuring the differential pressure generated by the sensor in the fluid. The power bar reflects the true flow velocity of the fluid, with an accuracy of ± 1.0% and a repeatability of ± 0.1%.
working principle:
When fluid flows through the probe, a high-pressure distribution area is generated in its front, and the pressure in the high-pressure distribution area is slightly higher than the static pressure of the pipeline. According to the Bernoulli equation principle, the velocity of the fluid increases as it flows through the probe, creating a low-pressure distribution area at the back of the probe. The pressure in the low-pressure distribution area is slightly lower than the static pressure of the pipeline. After the fluid flows through the probe, a partial vacuum is generated at the back of the probe, and vortices appear on both sides of the probe. The cross-sectional shape, surface roughness, and position of the low-pressure tapping hole of the average velocity flow probe are key factors determining the performance of the probe. The stability and accuracy of low-voltage signals play a decisive role in the accuracy and performance of the uniform velocity probe. The Weiliba average velocity flow probe can accurately detect the average differential pressure generated by the average velocity of the fluid. The Weiliba average flow probe has multiple pairs of pressure tapping holes arranged according to certain criteria in the high and low pressure areas, making it possible to accurately measure the average flow velocity
Measurement principle of Weiliba flowmeter
The Velbar flowmeter is a plug-in flow measurement instrument. Insert a Velbar sensor into the pipeline, and when fluid flows through the sensor, a high-pressure distribution area is generated in the upstream direction and a low-pressure distribution area is generated in the downstream direction. Sensors in high and low pressure areas have multiple pairs arranged according to certain rules, usually three pairs of pressure tapping holes, to measure the total pressure of the fluid, including static pressure, average velocity pressure Pl, and static pressure P2. P1 and P2 are respectively introduced into differential pressure transmitters to measure the differential pressure △ P=P1-P2. △ P reflects the magnitude of the average velocity of the fluid, and the flow rate of the fluid can be calculated accordingly.
Application areas:
The application of Weiliba flowmeter is extremely extensive, and the application of flow measurement technology and instruments can be roughly divided into the following fields.
production process
Flow meters are one of the major categories of instruments and devices in process automation. They are widely used in various fields of the national economy, such as metallurgy, power, coal, chemical, petroleum, transportation, construction, textiles, food, medicine, agriculture, environmental protection, and people's daily lives. They are important tools for developing industrial and agricultural production, saving energy, improving product quality, enhancing economic efficiency, and improving management level
Occupies an important position in the national economy. In process automation instruments and devices, flow meters have two main functions: as detection instruments for process automation control systems and as total quantity meters for measuring material quantities.
energy metering
Energy is divided into primary energy (coal, crude oil, coalbed methane, petroleum gas, and natural gas), secondary energy (electricity, coke, artificial gas, refined oil, liquefied petroleum gas, steam), and energy carrying working fluids (compressed air, oxygen, nitrogen, hydrogen, water), etc. Energy metering is an important means of scientifically managing energy, achieving energy conservation and consumption reduction, and improving economic efficiency. Flow meters are an important component of energy metering instruments. Commonly used energy sources such as water, artificial gas, natural gas, steam, and oil all use an extremely large number of flow meters, which are indispensable tools for energy management and economic accounting.
environmental protection engineering
The discharge of smoke, waste liquid, sewage, etc. seriously pollutes the atmosphere and water resources, posing a serious threat to the human living environment. The country has made sustainable development a national policy, and environmental protection will be the biggest issue of the 21st century. To control air and water pollution, it is necessary to strengthen management, and the basis of management is quantitative control of pollution levels.
China is a country that relies mainly on coal as its energy source, with millions of chimneys continuously emitting smoke into the atmosphere. Smoke emission control is an important project to eradicate pollution. Each chimney must be equipped with smoke analysis instruments and flow meters to form a continuous emission monitoring system. The flow rate and volume of flue gas pose significant challenges, including large and irregular chimney sizes, variable gas composition, wide flow velocity ranges, dirt, dust, corrosion, high temperatures, and the absence of straight pipe sections.
Transportation
There are five ways: railway and highway, aviation, water transportation, and pipeline transportation. Although pipeline transportation has long existed, its application is not widespread. With the prominent environmental issues, the characteristics of pipeline transportation have attracted people's attention. Pipeline transportation must be equipped with flow meters, which are the eyes of control, distribution, and scheduling, as well as essential tools for safety monitoring and economic accounting.
biotechnology
The 21st century will usher in the century of life sciences, and industries characterized by biotechnology will experience rapid development. There are many substances that need to be monitored and measured in biotechnology, such as blood, urine, etc. The difficulty of instrument development is extremely high, with a wide variety of products.
scientific experiment
The flow meters required for scientific experiments are not only numerous, but also extremely diverse in variety. According to statistics, a large part of the over 100 types of flow meters are for scientific research purposes. They are not mass-produced and are sold on the market. Many research institutions and large enterprises have set up dedicated teams to develop specialized flow meters.
marine meteorology
These fields are open channels that generally require detecting flow velocity and then calculating flow rate. The physical principles and fluid mechanics foundations on which flow meters and flow meters are based are common, but there are significant differences in instrument principles, structures, and usage conditions.
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