The Origin and Development of Vortex Flowmeters
The vortex flowmeter is widely used in the automation industry to measure various media such as water, oil, and gas. Today, I would like to introduce the history of the vortex flowmeter! To talk about the vortex flowmeter, we have to talk about the origin and development of the flowmeter first.
In 1738, Daniel Bernoulli used the differential pressure method to measure water flow based on the first Bernoulli equation.
In 1791, the Italian G.B. Venturi Research used a Venturi tube to measure the flow and published the research results.
In 1886, American Herschel made a practical measuring device for measuring water flow with a Venturi tube.
In the 1930s, the method of measuring the flow rate of liquid and gas with sound waves was introduced.
In 1955, the Maxon flowmeter using the acoustic circulation method was introduced to measure the flow of aviation fuel.
After the 1960s, measuring instruments began to develop in the direction of precision and miniaturization.Up to now, with the development of integrated circuit technology and the wide application of microcomputers, the capacity of flow measurement has been further improved.
At present, there are electromagnetic flowmeters, turbine flowmeters, vortex flowmeters, ultrasonic flowmeters, metal rotor flowmeters, and orifice flowmeters. Today we are mainly talking about vortex flowmeters and well-known vortex flowmeter manufacturers in China.
The vortex flowmeter is a new type of flowmeter based on the principle of Karman Vortex Street. It has been developed rapidly since the 1970s due to its advantages that other flowmeters cannot have at the same time. It is reported that the proportion of vortex flowmeters used in developed countries such as Japan, Europe, and the United States has increased significantly, and it has been widely used in various fields. It will play a leading role in future flow meters, and it is an ideal alternative to the orifice flowmeter.
Advantages of vortex flowmeter:
① Simple and firm structure, no movable parts, and reliable long-term operation;
② Very convenient maintenance and low installation cost;
③ The sensor does not directly contact the medium, with stable performance and long service life;
④ The output pulse signal is proportional to the flow, without zero drift, with high accuracy, and convenient for networking with the computer;
⑤ Wide measuring range, measuring range ratio up to 1:10;
⑥ Small pressure loss, low operating cost, more energy-saving significance;
⑦ Within a certain Reynolds number range, the output signal frequency is not affected by the changes in physical properties and components of the fluid. The instrument coefficient is only related to the shape and size of the vortex generator. The volume flow measurement of the fluid does not need to be compensated, and the instrument coefficient does not need to be re-calibrated after the replacement of accessories;
⑧ Wide range of applications, the flow of gas and liquid can be measured;⑨ The verification period is 2-4 years.
