CORIOLIS MASS FLOW METER

摘要

A first magnetic holder is attached to a U-shaped curved tube portion of a synthetic resin made measurement tube, and a magnetomotive body having a magnetic pole surface facing forward is embedded in a distal end of the first magnetic holder. A second magnetic holder is provided on a substrate at a position facing the distal end of the first magnetic holder with a space apart therefrom. The second magnetic holder includes a permanent magnet disposed to face the magnetomotive body in the first magnetic holder with a magnetic pole surface facing toward the first magnetic holder, so that the magnetic pole surface having a magnetic pole opposite to that of the magnetomotive body face each other. The permanent magnet of the second magnetic holder retains the curved tube portion of the measurement tube elastically with a space apart therefrom by attracting the magnetomotive body with a magnetic attraction force.

主权项

1. A Coriolis mass flow meter comprising:
a measurement tube that allows passage of fluid to be measured in one direction;
a magnetism retaining portion that retains predetermined positions of the measurement tube with a space apart therefrom;a vibration exciter unit configured to vibrate the measurement tube; anda displacement detecting unit that detects displacement of the measurement tube at two positions on an outbound tube and an inbound tube of the measurement tube,wherein the magnetism retaining portion provides a magnetic attraction force and a magnetic repulsive force to a magnetomotive body attached to the measurement tube or the measurement tube itself formed of a magnetomotive body or a ferromagnetic body to retain the measurement tube with a space apart therefrom.