Device for optimized pressure sensing for heating channels

Patent metadata

Field	Value
Publication number	US-9765802-B2
Application number	US-201314386150-A
Country	US
Kind code	B2
Filing date	Mar 18, 2013
Priority date	Mar 21, 2012
Publication date	Sep 19, 2017
Grant date	Sep 19, 2017

Abstract

A pressure measurement device in a tube ( 30 ) of a hydraulic circuit is disclosed, comprising a metal collar ( 2 ) provided with n (≧3) contact stops ( 22, 24, 26 ) made of an electrically insulating material, designed to come into contact with the wall of said tube, preventing the metal of the collar coming into contact with this wall, one of the contact stops ( 22 ) comprising a passage ( 22 ′) that will connect the atmosphere inside said tube with pressure measurement means.

First claim

The invention claimed is:

1. A pressure measurement device in a tube of a hydraulic circuit, comprising:
a metal collar having n≧2 contact stops made of an electrically insulating material, each of said contact stops having a contact surface for contacting a wall of said tube and preventing the metal collar from coming into contact with the wall of said tube,
each contact stop having a body with a first width greater than a second width farther removed from the contact surface than the first width, said second width dimensioned to fit inside a reaming of the collar, and
one of the contact stops comprising a passage connected to an atmosphere inside said tube, when the collar is in position around said tube.

2. The device according to claim 1 , wherein said metal collar comprises n reamings in which the n contact stops fit.

3. The device according to claim 1 , wherein each contact stop comprises:
a base, that extends along a first direction, connected to a body having
said first width along a second direction substantially perpendicular to the first direction;
said first width being greater than said second width of the base along said second direction or along a parallel direction; and
the first direction passing through an external surface S of the body that forms the contact surface on the tube, when the collar is in position around said tube.

4. The device according to claim 1 , wherein said metal collar comprises an internal groove to limit azimuthal clearance of at least one of the contact stops.

5. The device according to claim 1 , further comprising a centering mechanism which centers the passage with an orifice formed in the wall of said tube, when the collar is in position around said tube.

6. The device according to claim 1 , the collar comprising two parts to be assembled in a clamped position around the tube.

7. The device according to claim 1 , wherein each of the contact stops comprises a thermally insulating material.

8. The device according to claim 1 , wherein the tube is a component of an autoclave assembly of the hydraulic circuit.

9. The device according to claim 1 , wherein one of the contact stops comprises:
a passage connected to the atmosphere inside said tube; and
a seal mechanism which seals the passage to ensure leak tightness.

10. The device according to claim 9 , wherein the seal mechanism comprises a seal placed in contact with the contact surface of the contact stop, when said contact surface is in contact with the tube, or placed in a groove formed in the contact surface designed to hold said seal.

11. The device according to claim 9 , wherein the seal mechanism comprises a groove to hold a radial seal.

12. The device according to claim 9 , wherein the seal mechanism comprises:
a seal placed in contact with the contact surface of said one of the contact stops, when said contact surface is in contact with the tube, or placed in a first groove formed in the contact surface designed to hold said seal.

13. The device according to claim 12 , wherein the seal mechanism comprises:
a second groove to hold a radial seal, the diameter of the radial seal being greater than the diameter of the seal placed in contact with the contact surface of the contact stop, or placed in a groove formed in the contact surface.

14. A method of measuring a pressure in a tube of a hydraulic circuit, said tube comprising at least one pressure measurement orifice, said method comprising:
adjusting a metal collar provided with n≧2 contact stops made of an electrically insulating material by applying a contact surface of said stops in contact with a wall of said tube and preventing the metal collar from coming into contact with the wall, each contact stop having a body with a first width greater than a second width farther removed from the contact surface than the first width, said second width dimensioned to fit inside a reaming of the collar, and one of the contact stops comprising a passage that is aligned with one of the pressure measurement orifices of said tube; and
measuring the pressure in said passage.

15. The method according to claim 14 , further comprising:
heating the tube by an electrical current circulating in the wall of the tube to create a direct Joule effect.

16. The method according to claim 14 , wherein the metal collar comprises two parts assembled in a clamped position around the tube.

17. The method according to claim 14 , wherein each contact stop comprises:
a base, that extends along a first direction, connected to a body having a width along a second direction substantially perpendicular to the first direction;
said first width being greater than said second width of the base along said second direction or along a parallel direction; and
the first direction passing through an external surface S of the body that forms the contact on the tube, when the collar is in position around said tube.

18. The method according to claim 14 , further comprising:
centering the passage with a pressure measurement orifice in said tube by way of a centering pin inserted in the passage of said contact stop.

19. The method according to claim 14 , further comprising:
sealing the passage with a seal, placed in contact with the contact surface of the contact stop in contact with the tube, or placed in a groove formed in the contact surface designed to hold said seal.

20. The method according to claim 14 , further comprising:
sealing the passage with a radial seal disposed in a groove that holds the radial seal.

21. The method according to claim 14 , further comprising forming an autoclave assembly with said tube of the hydraulic circuit.

Assignees

• Commissariat A L'Energie Atomique Et Aux Ene Alt
• Commissariat L Energie Atomique Et Aux Energies Alternatives

Inventors

• Gros D'Aillon Luc
• Gueguen Jil
• Francois Fabrice

Classifications

• F15B19/005 Primary

  Fault detection or monitoring · CPC title

• G01L19/0007

  Fluidic connecting means · CPC title

• F16L41/008 Primary

  for connecting a measuring instrument · CPC title