Substitution kits for volumetric flow sensors and corresponding

Details Substitution kits for volumetric flow sensors and corresponding Substitution kits for volumetric flow sensors and corresponding

1998-06-09

2000-08-15

Patel, Harshad

Measuring and testing

Volume or rate of flow

By measuring vibrations or acoustic energy

7386161, G01F 132, G01F 142

Patent

active

061018856

ABSTRACT:
These substitution kits are provided for field-installed volumetric differential pressure flow sensors (101, 102, 103, 104, 105, 106) comprising bores (111, 121) for sensing the fluid pressure and an orifice plate (13) of standard thickness which is fixed fluid-tight between two pipes (1, 2) conducting a fluid to be measured. A first variant of the kit comprises an annular disk (23) which replaces the plate (13) and whose thickness is equal to that of the plate as well as whose opening has a diameter equal to the inside diameter of the pipes. A single bluff body (2311, 2312, 2313, 2314, 2317, 2318, 2319) is arranged in the lumen of the annular disk. The bore (111) of the pipe (1) is fluid-tightly closed by a device (18) after removal of the pressure sensor of the bore (111). A vortex sensing element (19) is inserted fluid-tightly in the bore (121) of the pipe (2) after removal of the sensor of this bore. Acc. to second variant both bores (111, 121) are closed fluid-tightly by devices (18, 28) after removal of the sensors of the bores, and a vortex sensing element (29; 39, 40) is fixed on or in wall of the pipe (2) adjacent the annular disk. Acc. to a third variant a vortex sensor (107, 108) comprises the annular disk (23) and the sensing element (29; 39, 40).

REFERENCES:
patent: 4171643 (1979-10-01), Frick
patent: 4186599 (1980-02-01), Frick
patent: 4397192 (1983-08-01), Mollet
patent: 4448064 (1984-05-01), Asayama
patent: 4696193 (1987-09-01), Nanba et al.

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