The structure of the electromagnetic flowmeter is mainly composed of a magnetic circuit system, a measuring conduit, an electrode, a casing, a lining, and a converter.
Magnetic circuit system: its role is to produce a uniform DC or AC magnetic field. The DC magnetic circuit is realized by a permanent magnet, which has the advantages of simple structure and less interference by the alternating magnetic field, but it is easy to polarize the electrolyte liquid in the measuring duct, so that the positive electrode is surrounded by negative ions, and the negative electrode is positive ion Surrounding, that is, the polarization phenomenon of the electrode, and causing an increase in internal resistance between the two electrodes, thus seriously affecting the normal operation of the meter. When the diameter of the pipe is large, the permanent magnets are correspondingly large, bulky and uneconomical, so the electromagnetic flowmeter generally adopts an alternating magnetic field and is generated by the excitation of a 50HZ power frequency power source.
Measuring catheter: its function is to let the conductive liquid to be tested pass. In order to make the magnetic flux diverted or short-circuited when the magnetic flux passes through the measuring catheter, the measuring catheter must be made of non-magnetic, low electrical conductivity, low thermal conductivity and mechanical strength. Non-magnetic stainless steel, FRP, high strength can be used. Plastic, aluminum, etc.
Gas turbine flowmeter and screwing vortex flowmeter measurement difference
Keywords: gas turbine flowmeter, Tianxin gas turbine flowmeter, gas gas turbine flowmeter
First, the characteristics of gas turbine flowmeter and spiral vortex flowmeter
Gas turbine flowmeter and screwing vortex flowmeter are the main gas metering instruments in China. In foreign countries, almost no one uses gas to swirl into the vortex flow meter. At present, there are certain applications in the domestic vortex flowmeter. In terms of standard conditions. The international standard ISO9551 promulgated by the International Organization for Standardization and the international recommendations R6, R32 promulgated by the International Organization of Legal Metrology (OIML) have corresponding national standards and regulations in China and developed countries. The above documents guarantee the authority of gas turbine flowmeters in gas metering. Sex. Gas-introducing vortex flowmeters have not yet established relevant standards. It is difficult to guarantee the authority of the flow meter in gas metering. At present, in domestic flow meters for gas measurement, gas turbine flowmeters dominate, and the vortex flowmeters also have a certain market. The use of the two is similar, and users often have doubts about the choice of the two.
Intelligent GPRS MAG flow meter features
☆ Timing acquisition of electromagnetic flowmeter data: The electromagnetic flowmeter is used to send a data mode to the host every hour.
The data includes:
(1) Instrument status part: module address, module name, current module time, module battery status;
(2) Meter data part: instantaneous flow rate, instantaneous flow rate, fluid conductivity ratio, positive and negative cumulative value
☆ Support short message, fixed IP and dynamic IP address transmission. Data transmission is stable and reliable, low power consumption, and low battery alarm. SMS (SMS): Support all China Unicom and China Mobile SIM
card users; GPRS mode: support for the opening of GPRS wireless Internet access (GPRS access point must be CMNET) China Mobile SIM card users
☆ GPRS communication supports two modes of TCP and UDP, and supports two connection modes of IP address and dynamic domain name.
☆ Integration of acquisition and transmission, improving system reliability and reducing costs;
☆ Do not crash, automatically restore after dropped calls;
☆ GPRS remote online setting and short message remote setting function;
☆ Onboard industrial grade GSM/GPRS communication module, convenient for users to choose GSM/GPRS networking mode
☆ Provide user setting software, open interface
☆ Good waterproof performance