| 摘要 |
An electromagnetic flow meter comprises a detector body interposable between the flanged ends of upstream and downstream pipes conveying a fluid whose flow rate is to be measured and an outer casing. The detector body includes a measuring pipe made of a non-magnetic material and a pair of electrodes positioned on an imaginary straight line orthogonal to the axis of the measuring pipe and contacting the fluid to be measured. The detector body also includes a pair magnetic flux generating units having magnet cores with coils wound thereon. The axis of the magnet cores are positioned on an imaginary straight line that intersects, at right angles, both the imaginary line connecting the electrodes and the axis of the measuring pipe at a single point of intersection. The magnetic flux generating units generate magnetic field lines orthogonal to the imaginary line connecting the electrodes and the axis of the measuring pipe. The outer casing is split into two portions and houses the detector body after the detector body has been assembled. In one embodiment of the invention, the inner surface of the outer casing includes a plurality of radially inward pojections that abut against the measuring pipe. In an alternative embodiment, the measuring pipe includes a plurality of radially outward projections that abut against the outer casing.
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