Title:
ELECTROMAGNETIC FLOWMETER
Document Type and Number:
Japanese Patent JP3405617
Kind Code:
B2
Abstract:
PURPOSE: To precisely measure a flow rate under a high magnetic Reynolds number condition, by arranging two pairs of electrodes having a predetermined angle with respect to a line passing through the center of a pipe line and between a pair of saddle type magnets, on the outer surface of the pipe line at angles expressed by a specific equation.
CONSTITUTION: A pair of small-size saddle type magnets 6 are arranged symmetrically so as to be opposed to each other, a cylindrical pipe line 2 in which high conductive fluid 4 flows, intervening therebetween, two pairs of electrodes 7 are arranged around the pipe line 2, symmetrically. The electrodes 7 are arranged on the outer surface of the pipe line 8 at angles ±θe which satisfies 0.5.(90degθm/2)≤θe≤90deg-θm/2. The magnets 6 should have dimensions which satisfy θm≤90deg. L≤D where L is length of the magnets 6 longitudinal of the pipe line 2, θm is angle of arc, and D is inner diameter of the pipe line 2. With this arrangement, the flowmeter can be small-sized, and alleviate affection by deterioration and demagnetization due to oxidation of the magnets in use at a high temperature, thereby it is possible to precisely measure a flow rate.
Inventors:
Takeshi Shimizu
Noriyuki Takeshima
Noriyuki Takeshima
Application Number:
JP5538195A
Publication Date:
May 12, 2003
Filing Date:
March 15, 1995
Export Citation:
Assignee:
Toshiba Corporation
International Classes:
G01F1/58; G01F1/00; G01F15/02; (IPC1-7): G01F1/58; G01F1/00; G01F15/02
Domestic Patent References:
| JP5860219A | ||||
| JP4812055A | ||||
| JP562507A | ||||
| JP62134522A | ||||
| JP2216016A | ||||
| JP6415613A | ||||
| JP55112216U |
Attorney, Agent or Firm:
Saichi Suyama
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