Pipeline magnetic inductive flowmeter structure and considerations

Time: 2024-07-01
Equipment Configuration:pipeline magnetic inductive flowmeter

Pipeline magnetic inductive flowmeter, also known as electromagnetic flowmeter, is a kind of instrument that utilizes the principle of electromagnetic induction to measure the volume flow of conductive liquid. It is widely used in petroleum, chemical, metallurgy, textile, food, pharmaceutical, environmental protection and other industries.

Project Overview

The structure of pipeline magnetic inductive flowmeter mainly consists of the following parts:

  • 1.Shell: made of ferromagnetic material, as the outer cover of the coil, to isolate the interference of the external environment, to ensure the normal working condition of the magnetic inductive flowmeter magnetic field.
  • 2.Conduit: the infrastructure part, to ensure that the medium (with conductivity) circulation of the tube body, must be non-conducting materials such as stainless steel, glass fiber reinforced plastic, carbon steel and so on.
  • 3. Electrode: Its function is to extract the induced potential signal proportional to the measurement. The electrode is usually made of non-magnetic material, and the installation position should be in the vertical direction of the pipe to prevent sediment from accumulating on the pipe and affecting the measurement accuracy.
  • 4.Magnetic circuit system: its function is to generate a uniform DC or AC magnetic field, electromagnetic flowmeter usually use an alternating magnetic field, and by 50HZ industrial frequency power supply excitation generated.
  • 5.Converter: Amplifies and converts the induced potential signal generated by the liquid flow into a unified standard signal, while suppressing the main interference signal.
  • 6.Lining: A complete electrically insulating lining on the inside of the measuring conduit and on the sealing surface of the flange, in direct contact with the liquid to be measured, increases the corrosion resistance of the measuring conduit and prevents the inductive potential from short-circuiting due to the wall of the metallic measuring conduit.

Pipeline Magnetic Flow Meter (Electromagnetic Flow Meter):

  • 1.Installation location: It should be installed in the location with smooth water flow and suitable pipe diameter, and at the same time, it needs to avoid ferromagnetic objects and equipments with strong electromagnetic field, so as to avoid the magnetic field affecting the sensor's working magnetic field and flow signal. In addition, electromagnetic flowmeter should be installed in a dry, cool, ventilated place, away from high temperature, vibration and corrosive substances.
  • 2.Pipeline connection: electromagnetic flowmeter installation needs to be connected to the pipeline, must ensure that the connection is not leakage, no leakage, otherwise it will affect the measurement accuracy.
  • 3.Grounding: Electromagnetic flowmeter needs good grounding to avoid electromagnetic interference and static electricity accumulation. The grounding resistance should be less than 10Ω.
  • 4.Horizontal installation: The axis of the electrode should be approximately horizontal when installed horizontally to avoid the influence of air bubbles and dirt on the measurement.
  • 5.Vibration and motor interference: To try to avoid strong vibration of the pipeline and interference from nearby large motors and other equipment.

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