Device For Determining A Physical Value Of A Liquid Flowing In A Pipe

• US 20110041619A1
• Filed: 02/02/2010
• Published: 02/24/2011
• Est. Priority Date: 03/13/2009
• Status: Active Grant

• Current Assignee: EMD Millipore Corporation (Merck & Co., Inc.)
• Original Assignee: Millipore Corporation
• Inventors: Vigna, James, Morrissey, Martin, Delbos, Cecile, Weissenbach, Jean-Louis, Reinbigler, Rene
• Granted Patent: US 8,297,128 B2
• Time in Patent Office: Days
• US Class Current: 73/756
• CPC Class Codes: A61M 1/3641 Pressure isolators
• CPC Class Codes: A61M 2205/3368 Temperature
• CPC Class Codes: G01J 5/0037 for sensing the heat emitted by liquids
• CPC Class Codes: G01J 5/08 Optical arrangements
• CPC Class Codes: G01J 5/0887 Integrating cavities mimicking black bodies, wherein the heat propagation between the black body and the measuring element does not occur within a solid; Use of bodies placed inside the fluid stream for measurement of the temperature of gases; Use of the reemission from a surface, e.g. reflective surface; Emissivity enhancement by multiple reflections
• CPC Class Codes: G01J 5/0893 Arrangements to attach devices to a pyrometer, i.e. attaching an optical interface; Spatial relative arrangement of optical elements, e.g. folded beam path G01J5/049 takes precedence
• CPC Class Codes: G01L 19/0023 for flowthrough systems having a flexible pressure transmitting element
• CPC Class Codes: G01L 19/003 using a detachable interface or adapter between the process medium and the pressure gauge
• CPC Class Codes: G01L 19/144 with dismountable parts, e.g. for maintenance purposes or for ensuring sterile conditions for detachable interface or adapter between the process medium and the pressure gauge G01L19/003

Abstract

A device for determining a physical value of a liquid flowing in a pipe, without contact with said liquid, said device comprising:

• • a sensor (3) for said physical value;
  • a connector (2) to insert into said pipe and comprising:
    • an internal passage (13) extending between two apertures (11, 12),
    • a flexible membrane (6) for a pressure sensor, forming a wall of said internal passage (13); and
  • means (27, 62) for fastening said sensor (3) onto said connector (2);
  • characterized in that said sensor is a temperature sensor (3) fastened to said connector (2) with the sensitive part of said sensor (3) turned towards said membrane (6).

Claims

1. A device for determining a physical value of a liquid flowing in a pipe, without contact with said liquid, said device comprising:

a sensor for said physical value;

a connector to insert into said pipe and comprising;

an internal passage extending between two apertures,

a flexible membrane for a pressure sensor, forming a wall of said internal passage; and

means for fastening said sensor onto said connector;

wherein said sensor is a temperature sensor fastened to said connector with the sensitive part of said sensor turned towards said membrane.

2. A device according to claim 1, wherein said sensor comprises an infrared temperature probe;

and a sheath enveloping said probe and comprising at one of its longitudinal ends, a stiff plate provided with an aperture;

said plate being disposed between said membrane and said sensitive part to stiffen said membrane.

3. A device according to claim 2, wherein said sensor comprises an obturating lid formed from an opaque film, said lid covering the face of said plate turned towards said membrane.

4. A device according to claim 3, wherein it comprises means for positioning said sensor relative to said connector in order for said lid to be in contact with a face of said membrane.

5. A device according to claim 4, wherein said positioning means comprise a shoulder adapted to cooperate in abutment with a collar.

6. A device according to claim 3, wherein said lid has constant emissivity in the temperature range from 4 to 40 degrees Celsius.

7. A device according to claim 2, wherein said sheath comprises a cup and a cap assembled together by screwing.

8. A device according to claim 7, wherein said cap comprises a breech of which the back is formed by said stiff plate.

9. A device according to claim 1, wherein said sensor comprises an infrared temperature prove, and said probe comprises a head accommodating a converging lens.

10. A device according to claim 1, wherein said fastening means comprise a tapping adapted to cooperate with a screw thread.

11. A device according to claim 1, wherein said connector is disposable whereas said sensor is re-usable.