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Title: Magnetic flowmeter for electrically conductive liquid

Abstract

A magnetic flowmeter includes first and second tube sections each having ls of non-magnetic material. The first tube is suitably connected to a process for passing a flow of an electrically conductive fluid to be measured. The second tube is established as a reference containing a still medium and is maintained at the same temperature as the first tube. A rotatable magnet assembly is disposed between the two tubes with at least two magnets attached to radially extending arms from a central shaft. Each magnet includes an air gap suitably sized to pass astraddle the diameter along a portion of the length of each of the two tubes. The magnets are provided in matched pairs spaced 180.degree. apart such that signals will be simultaneously generated in signal leads attached to each of the two tubes. By comparing the signals from the two tubes and varying the rotating speed of the magnet assembly until the signals are equal, or attain a maximum, the flow velocity of the fluid within the first tube can be determined. Through temperature monitoring and appropriate heaters, the two tubes are maintained at the same temperature.

Inventors:
 [1];  [2]
  1. Elmhurst, IL
  2. Naperville, IL
Issue Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
OSTI Identifier:
864320
Patent Number(s):
4346605
Assignee:
United States of America as represented by Department of Energy (Washington, DC)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01F - MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
magnetic; flowmeter; electrically; conductive; liquid; tube; sections; non-magnetic; material; suitably; connected; process; passing; flow; fluid; measured; established; reference; containing; medium; maintained; temperature; rotatable; magnet; assembly; disposed; tubes; magnets; attached; radially; extending; arms; central; shaft; air; gap; sized; pass; astraddle; diameter; portion; length; provided; matched; pairs; spaced; 180; degree; apart; signals; simultaneously; generated; signal; leads; comparing; varying; rotating; speed; equal; attain; maximum; velocity; determined; monitoring; appropriate; heaters; temperature monitoring; conductive fluid; air gap; electrically conductive; radially extending; flow velocity; magnetic material; tube sections; magnet assembly; tube section; non-magnetic material; central shaft; conductive liquid; matched pair; temperature monitor; simultaneously generate; matched pairs; magnetic flowmeter; /73/

Citation Formats

Skladzien, Stanley B, and Raue, Donald J. Magnetic flowmeter for electrically conductive liquid. United States: N. p., 1982. Web.
Skladzien, Stanley B, & Raue, Donald J. Magnetic flowmeter for electrically conductive liquid. United States.
Skladzien, Stanley B, and Raue, Donald J. Fri . "Magnetic flowmeter for electrically conductive liquid". United States. https://www.osti.gov/servlets/purl/864320.
@article{osti_864320,
title = {Magnetic flowmeter for electrically conductive liquid},
author = {Skladzien, Stanley B and Raue, Donald J},
abstractNote = {A magnetic flowmeter includes first and second tube sections each having ls of non-magnetic material. The first tube is suitably connected to a process for passing a flow of an electrically conductive fluid to be measured. The second tube is established as a reference containing a still medium and is maintained at the same temperature as the first tube. A rotatable magnet assembly is disposed between the two tubes with at least two magnets attached to radially extending arms from a central shaft. Each magnet includes an air gap suitably sized to pass astraddle the diameter along a portion of the length of each of the two tubes. The magnets are provided in matched pairs spaced 180.degree. apart such that signals will be simultaneously generated in signal leads attached to each of the two tubes. By comparing the signals from the two tubes and varying the rotating speed of the magnet assembly until the signals are equal, or attain a maximum, the flow velocity of the fluid within the first tube can be determined. Through temperature monitoring and appropriate heaters, the two tubes are maintained at the same temperature.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1982},
month = {1}
}