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1. WO2020157028 - PROCÉDÉ ET PIÈCES D'USURE POUR MAINTENANCE PRÉDICTIVE

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

Claims

1. A method for detecting excessive wear of a wearing part,

which wearing part:

a) either consists primarily of, or is covered at least partially by a sliding layer consisting primarily of, a polymer material such as PolyTetra Flour Ethylen (PTFE), Polychlorotrifluoroethylene (PCTFE), Perfluoroalkoxy (PFA), Tetrafluorethylene-perfluoropropylene (FEP), ETFE, FEP, LCP, Chlorotrifluoroethylene (E-CTFE), PE, PEEK, PET, PVDF, THV and/or the like, and

b) comprises one or more optical fibers fitted in, embedded in, indented in or fused with said polymer material, of which:

- at least one first optical fiber is in its proximal end connected to a proximal light detecting device comprising a first element which emits visible light when light is emitted from a light emitting device into the proximal end of said at least one first optical fiber, and

- at least one optical fiber, optionally being said first optical fiber, is in its distal end connected to a distal end light detecting device comprising a second element, which emits visible light, when light, emitted from said light emitting device into said proximal end of said at least one first optical fiber, is emitted from the distal end of said optical fiber, optionally being said first optical fiber,

and which wearing part and one or more optical fibers are further characterized in that

c) light emitted from said light emitting device into said proximal end of said at least one first optical fiber, has travelled either along substantially the entire

circumference of said wearing part, or has traversed substantially the entire length

of said wearing part, through said optical fiber or fibers, when emitted from the distal end of said optical fiber, optionally being said first optical fiber, and

d) the distance travelled by said light along said substantially entire circumference of said wearing part, or when traversing said substantially entire length of said wearing part, between said proximal end of said at least one first optical fiber, and said distal end of said optical fiber, optionally being said first optical fiber, is at least 500 mm,

and, which method comprises at least the following steps:

- turning on said light emitting device,

- inspecting whether said proximal and said distal light detecting devices emit visible light, and

- concluding that said wearing parts are not subject to excessive wear if both said proximal and said distal light detecting devices emit visible light.

2. A method according to claim 1 , wherein said light emitting device is a laser device.

3. A method according to claim 1 , wherein at least one of said light detecting devices consists of a lens made from semi-transparent material.

4. A method according to any of claims 1 , 2 or 3 wherein the presence and/or absence of any visible light emitted by at least one of said light detecting devices is detected by a photo optical sensor, and information thereabout is stored, as an integral part of a process control system (DCS).

5. A method according to any of claims 1 -4 wherein said one or more optical fibers are interconnected by means of splitters or reflectors.

6. A method according to any of claims 1 -5 wherein said wearing part is a sealing. 7. A method according to claim 6, wherein one or more said optical fibers being fitted in, embedded in said sealing in itself encircles the circumference of said sealing.

8. A wearing part, which:

a) either consists primarily of, or is covered at least partially by a sliding layer consisting primarily of, a polymer material such as PolyTetra Flour Ethylen (PTFE), Polychlorotrifluoroethylene (PCTFE), Perfluoroalkoxy (PFA), Tetrafluorethylene-perfluoropropylene (FEP), ETFE, FEP, LCP, Chlorotrifluoroethylene (E-CTFE), PE, PEEK, PET, PVDF, THV and/or the like, and

b) comprises one or more optical fibers fitted in, embedded in, indented in, or fused with said polymer material, of which:

- at least one first optical fiber is in its proximal end connected to a proximal light detecting device comprising a first element which emits visible light when light is emitted from a light emitting device into the proximal end of said at least one first optical fiber, and

- at least one optical fiber, optionally being said first optical fiber, is in its distal end connected to a distal end light detecting device comprising a second element, which emits visible light, when light, emitted from said light emitting device into said proximal end of said at least one first optical, fiber is emitted from the distal end of said optical fiber, optionally being said first optical fiber.

and which wearing part and one or more optical fibers are further characterized in that

c) light emitted from said light emitting device into said proximal end of said at least one first optical fiber, has travelled either along substantially the entire

circumference of said wearing part, or has traversed substantially the entire length

of said wearing part, through said optical fiber or fibers, when emitted from the distal end of said optical fiber, optionally being said first optical fiber, and

d) the distance travelled by said light along said substantially entire circumference of said wearing part, or when traversing said substantially entire length of said wearing part, between said proximal end of said at least one first optical fiber, and said distal end of said optical fiber, optionally being said first optical fiber, is at least 500 mm.

9. A wearing part according to claim 8, wherein said light emitting device is a laser device.

10. A wearing part according to any of claims 8 or 9, wherein said one or more optical fibers are interconnected by means of splitters or reflectors

11. A wearing part according to any of claims 8-10, which is a sealing.

12. A wearing part according to claim 11 , wherein one of said optical fibers being fitted in, embedded in said sealing in itself encircles the complete circumference of said sealing.

13. A wearing part according to any of claims 8-12, wherein at least one of said light detecting devices consists of a lens made from semi-transparent material.