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Basic introduction: The development of the measurement can be traced back to the ancient water conservancy projects and urban water supply systems. In the ancient Roman Caesar era, hole plates were used to measure the drinking water volume of residents. Ancient Egypt measured the flow of the Nile around 1000 BC. China's famous Dujiangyan water conservancy project applied Aquarius mouth water level observation water size and other gas flow meter. Measurement is the eye of industrial production. Flow measurement is one of the components of measurement science and technology, which is closely related to the national economy, national defense construction and scientific research. To do a good job plays an important role in ensuring product quality, improving production efficiency and promoting the development of science and technology, especially in the energy crisis, the degree of industrial automation in industrial production is getting higher and higher, the status and role of flow meter in the national economy is more obvious.
Development trend: In industrial sites, instruments for measuring fluid flow are collectively referred to as flow meters or flow meters. It is one of the most important instruments in industrial measurement. With the development of industry, the accuracy and scope of flow measurement requirements are becoming higher and higher. In order to adapt to a variety of uses, various types of flow meters have been published, widely used in oil and gas, petrochemical, water treatment, food and beverage, pharmaceutical, energy, metallurgy, pulp and paper, and building materials and other industries.Frost & Sullivan Consulting uses a 360-degree full-perspective research model to pursue a global, integrated application industry, technology development, economy, competitive environment and industry users to conduct a comprehensive study of the flow meter market. This paper uses volumetric flow meter, turbine flow meter (typical impeller), differential pressure, variable area, electromagnetic, ultrasonic flow meter, vortex street flow meter (typical fluid oscillator), corolis and insert thermal mass flow meter to analyze the market. The global meter market reached $2.83 billion in 2008, up about 3.9% from 2007.
Globally, the leading manufacturers of flow meters include: Bitobar, ABB, Emerson, EndressHauser or E. H. Krohne, Siemens, Yokogawa, And GeneralElectric, Honeywell, Invensys and Yamatake. Flow meter is divided into differential pressure flow meter, rotor flow meter, throttled flow flow meter, fine slit flow meter, volume flow meter, electromagnetic flow meter, ultrasonic flow meter, turbine flow meter and vortex street flow meter and so on. Classification by medium: liquid flow meter, gas flow meter, steam flow meter and solid flow meter.
Commonly used in the field of health: turbine flow meter, is the main type of velocity flow meter, it uses a multi-blade rotor (turbine) to feel the average fluid flow rate, so as to derive the flow rate or the total amount of the instrument. Generally, it consists of sensors and displays, which can also be made into a whole type.
Turbo flow meter and volumetric flow meter, Coriolis mass flow meter are called the three types of repetitive, the most accurate products in the flow meter, as one of the top ten types of flow meters, its products have developed into a multi-variety, multi-series of mass production scale.
Merit: (1) High precision, among all the flow meters, belongs to the most accurate flow meter; (2) Good repeatability; (3) Yuan zero-point drift, good anti-interference ability; (4) Wide range; (5) Compact structure.
Shortcoming: (1) Can not maintain the calibration characteristics for a long time; (2) Fluid property has a great impact on the flow characteristics.
Application overview: turbine flow meter in some of the following measurement objects are widely used: oil, organic liquid, inorganic liquid, liquefied gas, natural gas, food, beverage and low temperature fluid in Europe and the United States, turbine flow meter is second only to the hole plate flow meter natural measuring meter, only the Netherlands in natural gas pipeline used more than 2600 various sizes, pressure from 0.8~6.5MPa gas turbine flow meter, they have become a good gas measuring meter.
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July 21, 2022
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