Device and method for recovering magnetic particles trapped on a magnetic plug

Patent metadata

Field	Value
Publication number	US-9687857-B2
Application number	US-201113637160-A
Country	US
Kind code	B2
Filing date	Mar 21, 2011
Priority date	Mar 29, 2010
Publication date	Jun 27, 2017
Grant date	Jun 27, 2017

Abstract

A device for recovering magnetic particles trapped on a magnetic plug that has a bar magnet to retain the magnetic particles entrained by a liquid in which the magnetic plug is immersed, the device including a cap including a non-magnetic tube having a proximal end having an opening for the insertion of the magnet into the tube and a closed distal end, the tube to cover the magnet when it is inserted into the tube, a retention device to ensure retention between the cap and the magnet when the magnet is inserted into the tube, an extraction device provided with an opening to ensure insertion of the tube into the extraction device, the extraction device to cover the tube when the tube is inserted into the extraction device and to receive the particles trapped on the tube when the magnet is withdrawn from the tube, and a retention device to ensure retention between the extraction device and the tube.

First claim

The invention claimed is:

1. A device for recovering magnetic particles trapped on a magnetic plug, said magnetic plug comprising a bar magnet for retaining magnetic particles entrained by a liquid in which said magnetic plug is immersed, said device comprising:
a cap comprising a non-magnetic tube, said non-magnetic tube comprising:
a proximal end provided with an opening that allows the bar magnet to be introduced into said non-magnetic tube;
a closed distal end, said non-magnetic tube being capable of overlaying the bar magnet when the bar magnet is introduced into said non-magnetic tube;

a first retention device to ensure retention between said cap and the bar magnet when the bar magnet is introduced into said non-magnetic tube;
an extraction device provided with an opening for allowing said non-magnetic tube to be introduced into said extraction device, said extraction device being capable of overlaying said non-magnetic tube when said non-magnetic tube is introduced into said extraction device so as to form a sealed extraction chamber, the magnetic particles being introduced into the extraction device only through the opening, and being capable of receiving particles trapped on said non-magnetic tube when the bar magnet is withdrawn from said non-magnetic tube;
a second retention device to ensure retention between said extraction device and said non-magnetic tube when said non-magnetic tube is introduced into said extraction device,
wherein the extraction device includes a single opening defined by said opening for allowing said non-magnetic tube to be introduced into said extraction device,
wherein the extraction device has a shape of an elongated tube, and
wherein
the non-magnetic tube has an outer longitudinal wall extending along a longitudinal direction of the non-magnetic tube between the proximal end and the closed distal end,
the elongated tube has an inner longitudinal wall extending along a longitudinal direction of the elongated tube, and
the outer longitudinal wall is spaced apart from the inner longitudinal wall when the non-magnetic tube is introduced into the elongated tube so as to collect the particles trapped on the outer longitudinal wall in the sealed extraction chamber.

2. The device as claimed in claim 1 , wherein said second retention device to ensure retention between said extraction device and said non-magnetic tube when said non-magnetic tube is introduced into said extraction device is a reversible connector.

3. The device as claimed in claim 2 , wherein the reversible connector is formed by a screw-nut system placed at said proximal end of said non-magnetic tube.

4. The device as claimed in claim 1 , wherein said cap comprises a collar connected to the proximal end of said non-magnetic tube and provided with a thread on an external diameter of the collar.

5. The device as claimed in claim 1 , wherein said non-magnetic tube is an elastic sheath that is configured to enclose the bar magnet.

6. The device as claimed in claim 1 , wherein said non-magnetic tube comprises a ferromagnetic element placed at a distal end of the non-magnetic tube.

7. The device as claimed in claim 1 , wherein said first retention device to ensure retention between said cap and the bar magnet when the bar magnet is introduced into said non-magnetic tube comprises a seal that is adapted to prevent the insertion of metallic particles between the non-magnetic tube and the bar magnet.

8. The device as claimed in claim 1 , wherein said first retention device to ensure retention between said cap and the bar magnet when the bar magnet is introduced into said non-magnetic tube comprises an O-ring inserted in said cap that clamps the bar magnet by elasticity.

9. The device as claimed in claim 1 , wherein said first retention device to ensure retention between said cap and the bar magnet when the bar magnet is introduced into said non-magnetic tube comprises flexible tongues inserted in the cap that clamp the bar magnet by elasticity.

10. The device as claimed in claim 1 , wherein said first retention device to ensure retention between said cap and the bar magnet when the bar magnet is introduced into said non-magnetic tube comprises flexible tabs inserted in the cap that clamp the bar magnet by elasticity.

11. The device as claimed in claim 1 , wherein said magnetic plug comprises a support end, and said proximal end of the non-magnetic tube is capable of coming into contact with the support end when the bar magnet is introduced into said non-magnetic tube.

12. The device as claimed in claim 1 , wherein the elongated tube is a cylinder.

13. The device as claimed in claim 1 , wherein the second retention device includes threads to fasten the non-magnetic tube to the extraction device.

14. The device as claimed in claim 1 , wherein said sealed extraction chamber is configured to surround at least part of said bar magnet when said bar magnet is introduced into said non-magnetic tube and said non-magnetic tube, provided with said bar magnet, is introduced into the extraction chamber.

15. A device for recovering magnetic particles trapped on a magnetic plug, said magnetic plug comprising a bar magnet configured to retain magnetic particles entrained by a liquid in which said magnetic plug is to be immersed, said device comprising:
a cap comprising a non-magnetic tube, said non-magnetic tube comprising:
a proximal end provided with an opening that allows the bar magnet to be introduced into said non-magnetic tube;
a closed distal end, said non-magnetic tube being capable of overlaying the bar magnet when the bar magnet is introduced into said non-magnetic tube;

a retainer configured to hold said cap and the bar magnet together when the bar magnet is introduced into said non-magnetic tube;
an extraction device provided with an opening and configured to allow said non-magnetic tube to be introduced into said extraction device, said extraction device being capable of overlaying said non-magnetic tube when said non-magnetic tube is introduced into said extraction device so as to form a sealed extraction chamber, the magnetic particles being introduced into the extraction device only through the opening, and being capable of receiving particles trapped on said non-magnetic tube when the bar magnet is withdrawn from said non-magnetic tube;
a connector configured to hold said extraction device and said non-magnetic tube together when said non-magnetic tube is introduced into said extraction device,
wherein
the non-magnetic tube has an outer longitudinal wall extending along a longitudinal direction of the non-magnetic tube between the proximal end and the closed distal end,
the extraction device has a shape of an elongated tube,
the elongated tube has an inner longitudinal wall extending along a longitudinal direction of the elongated tube, and
the outer longitudinal wall is spaced apart from the inner longitudinal wall when the non-magnetic tube is introduced into the elongated tube so as to collect the particles trapped on the outer longitudinal wall in the sealed extraction chamber.

16. A method for recovering magnetic particles trapped on a magnetic plug using a device for recovering magnetic particles, said magnetic plug comprising a bar magnet for retaining magnetic particles entrained by a liquid in which said magnetic plug is immersed, said device comprising:
a cap comprising a non-magnetic tube, said non-magnetic tube comprising:
a proximal end provided with an opening that allows the bar magnet to be introduced into said non-magnetic tube;
a closed distal end, said non-magnetic

Assignees

• Berthod Gilles
• Colladon Fabrice
• Snecma

Inventors

• Berthod Gilles
• Colladon Fabrice

Classifications

• B03C1/286

  disposed at the inner circumference of a recipient, e.g. magnetic drain bolt · CPC title

• B03C2201/18

  Magnetic separation whereby the particles are suspended in a liquid · CPC title

• B03C2201/28

  Parts being designed to be removed for cleaning purposes · CPC title

• B03C1/032 Primary

  Matrix cleaning systems · CPC title