EP2493623A1 - Device and method for recovering magnetic particles trapped on a magnetic plug - Google Patents

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

Info

Publication number
EP2493623A1
EP2493623A1 EP10776619A EP10776619A EP2493623A1 EP 2493623 A1 EP2493623 A1 EP 2493623A1 EP 10776619 A EP10776619 A EP 10776619A EP 10776619 A EP10776619 A EP 10776619A EP 2493623 A1 EP2493623 A1 EP 2493623A1
Authority
EP
European Patent Office
Prior art keywords
enclosure
magnetic
particles
plug
opening
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP10776619A
Other languages
German (de)
French (fr)
Other versions
EP2493623B1 (en
Inventor
Fabrice Colladon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Safran Aircraft Engines SAS
Original Assignee
SNECMA Services SA
SNECMA SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SNECMA Services SA, SNECMA SAS filed Critical SNECMA Services SA
Publication of EP2493623A1 publication Critical patent/EP2493623A1/en
Application granted granted Critical
Publication of EP2493623B1 publication Critical patent/EP2493623B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated
    • B03C1/28—Magnetic plugs and dipsticks
    • B03C1/284—Magnetic plugs and dipsticks with associated cleaning means, e.g. retractable non-magnetic sleeve
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated
    • B03C1/025—High gradient magnetic separators
    • B03C1/031—Component parts; Auxiliary operations
    • B03C1/032—Matrix cleaning systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated
    • B03C1/28—Magnetic plugs and dipsticks
    • B03C1/286—Magnetic plugs and dipsticks disposed at the inner circumference of a recipient, e.g. magnetic drain bolt

Definitions

  • the invention relates to a device and a method for recovering magnetic particles trapped on a magnetic plug for retaining, by means of a magnet, the magnetic particles entrained by a liquid and resulting from the wear of parts, such as for example rotating parts arranged in an aircraft equipment or engine casing.
  • a magnetic plug is placed in a liquid circuit (typically oil, coolant or fuel) inside a casing containing moving parts, such as gears or bearings. , which bathe in said liquid.
  • a liquid circuit typically oil, coolant or fuel
  • moving parts such as gears or bearings.
  • the function of the liquid circuit is to allow the lubrication and / or cooling of moving parts (typically rotating parts). It turns out that the moving parts are worn during their lifetime, for example because of the friction resulting from contact between two gears or bearings, or because of shocks or intense friction between rotating parts due to intense and abnormal vibrations propagating in the crankcase. Whatever its cause, the wear of the parts causes the formation of particles that are detached from the parts and are entrained by the liquid in the liquid circuit. Since the rotating parts are generally metallic, the particles resulting from wear of the parts are conductive and are generally in the form of filings. What is more, the parts are most often made of a ferromagnetic type metal such as iron, that is to say able to be attracted by a magnetic element such as a magnet.
  • a ferromagnetic type metal such as iron
  • a magnetic plug 1 comprises at one end a head or support 2 and a permanent magnet formed by a magnetic bar 3 immersed in the circuit liquid, said bar 3 attracting the metal particles 4 during the circulation of the liquid.
  • a first technique is to use an adhesive tape that the operator puts in contact with the magnetic bar of the plug.
  • a second technique is to use a cloth to collect the particles on the magnetic bar.
  • a third technique may be to directly collect the particles on the bar with a magnet more powerful than the magnet of the magnetic bar.
  • the present invention aims to provide a device for a fast, reliable and complete recovery of magnetic particles trapped on a magnetic plug.
  • the invention relates to a magnetic particle recovery device trapped on a magnetic plug, said magnetic plug having a support end and a magnetic element for retaining the magnetic particles entrained by a liquid and resulting from the wear of parts with which said liquid has been in contact, said recovery device comprising:
  • said enclosure being able to receive said magnetic plug via said opening so that said magnetized element is housed inside said enclosure and said support end is located outside said enclosure, said opening being dimensioned with so that said support end closes said opening;
  • At least one injection nozzle capable of injecting a gaseous fluid inside said enclosure, said nozzle being oriented so that the flow of gaseous fluid expels the magnetic particles retained on said magnetic element towards the bottom of said enclosure, said magnetization means being arranged to trap by magnetization said particles driven to the bottom of said enclosure.
  • a pressure injection of gas is used (preferably filtered and deoiled compressed air, injected for example at 6 bar) via at least one nozzle.
  • the flow of gas will allow to detach the magnetic particles on the magnetic plug and send these particles to the bottom of the device enclosure.
  • the presence of magnetization means preferentially arranged near the bottom of the enclosure and outside thereof will allow the trapping of these particles (ie the particles can not rise because they are trapped by the means of magnetization).
  • the device according to the invention is therefore a tool for operators to reliably recover all the magnetic particles, the latter being separated from the magnetic plug under the effect of an air jet when the plug is placed in the enclosure of the tooling.
  • the device according to the invention may have one or more additional characteristics below, considered individually or in any technically possible combination:
  • the device according to the invention comprises a plurality of injection nozzles mounted on said enclosure;
  • said magnetic element of said magnetic plug is a magnetic bar; said enclosure is dimensioned to receive said magnetic bar inside said enclosure and said nozzles are disposed laterally on said enclosure so that they are located on either side of said bar when the latter is in position inside said enclosure;
  • each of said nozzles is inclined by 45 ° with respect to the axis of the bar when the latter is in position inside said enclosure; said magnetization means are disposed outside said enclosure near the bottom of said enclosure;
  • said magnetization means are removably mounted on the outer face of the bottom of said enclosure;
  • said magnetization means are arranged to be situated at a distance of between 2 and 5 cm from said magnetized element when the latter is inside said enclosure;
  • the device according to the invention comprises sealing means such as an O-ring capable of sealing between said support end and said opening when said support end closes said opening.
  • the subject of the invention is also a process for recovering magnetic particles trapped on a magnetic plug by means of a device according to the invention, said method comprising the following steps:
  • the particle recovery step comprises the following steps:
  • FIG. 1 shows, schematically, a magnetic plug
  • FIG. 2 shows schematically a particle recovery device according to the invention
  • FIGS. 3 to 7 illustrate the different steps of a particle recovery process according to the invention
  • FIG. 2 diagrammatically represents a device 100 for recovering magnetic particles according to the invention.
  • the device 100 according to the invention comprises:
  • sealing means 103 in the form of an O-ring disposed around the opening 102;
  • a cylindrical magnet 106 removably mounted in the support 105; - a vent pipe 1 07.
  • Each of the nozzles 104 is inclined at an angle of 45 ° with respect to the vertical axis 00 '.
  • the enclosure 1 01 may be made of a transparent plastic material.
  • FIG. 3 to 7 an example of a method for recovering ferromagnetic particles trapped on a magnetic plug 1 such as that represented in FIG. 1 by means of the recovery device 100 according to the invention as represented in FIG. Figure 2.
  • Figure 8 shows the sequence of steps 201 to 205 of the method 200. It will be noted that these steps 201 to 205 will preferably be implemented on site by an operator.
  • the magnetic plug 1 After having been recovered by the operator for analysis of the trapped particles 4, is put into place in the device 100. More specifically, the magnetic bar 3 (on which the magnetic particles 4 are retained) is inserted into the chamber 1 01 and the support end 2 (or head) of the plug 1 closes the opening 1 02.
  • the opening 102 of the device 1 must be dimensioned so that its diameter is smaller than the diameter of the head 2 of the plug 1.
  • the O-ring 1 03 seals between the support end 2 and the opening 1 02.
  • filtered compressed and deoiled air (to prevent any pollution of the particles 4) inside the enclosure 1 01 is injected for a few seconds via the nozzles 1 04. .
  • the inclination at 45 ° with respect to the vertical axis of the nozzles 1 04 makes it possible to direct the jet of compressed air towards the end of the magnetic bar 3 on which the particles 4 are retained.
  • the set of particles 4 being found on the bar 3 are now driven to the bottom of the enclosure 101 and are trapped by the magnet 1 06 which is powerful enough to hold them at the bottom of the enclosure 1 01 and avoid that they go up to the top of the enclosure.
  • venting is provided by the vent pipe 1 07 to avoid overpressure.
  • the height of the enclosure 1 01 is adjusted so that the distance d between the magnet 106 of the end of the magnetic bar 3 is between 2 and 5 cm: this distance d is sufficient for the magnetization of the magnet 106 does not disturb the magnetization of the bar 3 which must remain substantially constant for later use.
  • the magnetic plug 1 is extracted from the device 1 00 according to the invention and then the magnet 1 06 is removed from the support 1 05 (for the memory, the magnet 1 06 is removably mounted on the support 105), the particles 4 always being at the bottom of the chamber 101.
  • Step 204 illustrated in FIG. 6 will consist in recovering the particles 4 at the bottom of the receptacle 0.
  • a cylinder 1 1 2 made of copper sliding in a tube 1 1 1 glass and provided at its lower end with a magnet 1 1 0. Plunging to the bottom of the enclosure 1 01 the cylinder 1 1 2 inserted in the tube 1 1 1, the particles 4 are magnetized by the magnet 1 1 0.
  • step 205 illustrated in FIG. 7 the particles 4 are then recovered in a plastic bag 1 3 by sliding upwards (in the direction of the arrow) the cylinder 1 12 in the tube 1 1 1; raising the cylinder 1 12 removes the magnetic field exerted by the magnet 1 10 on the particles 4.
  • the bag 1 13 can then be transmitted by the operator to a laboratory for particle analysis 4.
  • the invention is not limited to the embodiment just described.
  • the particle recovery step at the bottom of the enclosure of the device according to the invention has been described in the context of the use of a sliding cylinder in a tube. It is also perfectly possible to recover the particles by inverting the device according to the invention in order to directly transfer the particles (which are no longer trapped by the magnet 106 previously removed) in a bag.
  • the device has been described more specifically with a removable magnet 106. It is also possible to use a non-removable electromagnet whose magnetization will be controlled according to whether or not it is desired to maintain the trapped particles.
  • the device preferably comprises a plurality of nozzles distributed around the enclosure, it is also conceivable to use only one injection nozzle by rotating the plug inside the device according to the invention. invention so that the jet of compressed air reaches the entire surface of the bar on which the particles are trapped.
  • the device according to the invention which has just been described finds a particularly interesting application in use with magnetic plugs used on all machines for which it is important to be able to detect wear, especially on aircraft turbomachines. On the latter, the use of several magnetic plugs, on the various oil circuits, can quickly locate a part with a beginning of wear.

Landscapes

  • Sampling And Sample Adjustment (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Soft Magnetic Materials (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)

Abstract

The invention relates to a device (100) for recovering magnetic particles (4) trapped on a magnetic plug (1). The magnetic plug (1) comprises a supporting end (2) and a magnetized element (3) for retaining the magnetic particles (4) in a liquid resulting from the wear of parts with which said liquid has been in contact. Said recovery device (100) includes magnetization means (106) and an enclosure (101) having an opening (102). Said enclosure (101) is capable of receiving the magnetic plug (1) via said opening (102) such that the magnetized element (3) is located inside said enclosure (101) and such that the supporting end (2) is located outside said enclosure (101). Said opening (102) is sized such that said supporting end (2) blocks said opening (102). The device (100) further comprises at least one injection nozzle (104) capable of injecting a gaseous fluid inside said enclosure (101), said nozzle (104) being oriented such that the flow of gaseous fluid expels the magnetic particles (4) retained on the magnetized element (3) toward the bottom of said enclosure (101). The magnetization means (106) are arranged so as to trap, by means of magnetization, the particles (4) urged toward the bottom of said enclosure (101).

Description

DISPOSITIF ET PROCEDE DE RECUPERATION DE PARTICULES MAGNETIQUES PIEGEES SUR UN BOUCHON MAGNETIQUE  DEVICE AND METHOD FOR RECOVERING MAGNETIC PARTICLES SPILLED ON A MAGNETIC CAP
L'invention concerne un dispositif et un procédé de récupération de particules magnétiques piégées sur un bouchon magnétique destiné à retenir, au moyen d'un aimant, les particules magnétiques entraînées par un liquide et résultant de l'usure de pièces, telles que par exemple les pièces rotatives disposées dans un carter d'équipement ou de moteur d'aéronef. The invention relates to a device and a method for recovering magnetic particles trapped on a magnetic plug for retaining, by means of a magnet, the magnetic particles entrained by a liquid and resulting from the wear of parts, such as for example rotating parts arranged in an aircraft equipment or engine casing.
De façon connue, un bouchon magnétique est placé dans un circuit de liquide (typiquement de l'huile, du liquide de refroidissement ou du carburant) à l'intérieur d'un carter contenant des pièces en mouvement, telles que des engrenages ou des roulements, qui baignent dans ledit liquide.  In known manner, a magnetic plug is placed in a liquid circuit (typically oil, coolant or fuel) inside a casing containing moving parts, such as gears or bearings. , which bathe in said liquid.
De façon générale, la fonction du circuit de liquide est de permettre la lubrification et/ou le refroidissement des pièces en mouvement (typiquement les pièces rotatives). Il se trouve que les pièces en mouvement sont amenées à s'user au cours de leur vie, par exemple en raison du frottement résultant du contact entre deux roues dentées ou de roulements, ou bien en raison de chocs ou frottements intenses entre pièces rotatives dus à des vibrations intenses et anormales se propageant dans le carter. Quelle que soit sa cause, l'usure des pièces entraine la formation de particules qui se détachent des pièces et sont entraînées par le liquide dans le circuit de liquide. Dans la mesure où les pièces rotatives sont généralement métalliques, les particules résultant de l'usure des pièces sont conductrices et se présentent généralement sous la forme de limaille. Qui plus est, les pièces sont le plus souvent réalisées en un métal du type ferromagnétique comme le fer, c'est-à-dire apte à être attiré par un élément magnétique tel qu'un aimant.  In general, the function of the liquid circuit is to allow the lubrication and / or cooling of moving parts (typically rotating parts). It turns out that the moving parts are worn during their lifetime, for example because of the friction resulting from contact between two gears or bearings, or because of shocks or intense friction between rotating parts due to intense and abnormal vibrations propagating in the crankcase. Whatever its cause, the wear of the parts causes the formation of particles that are detached from the parts and are entrained by the liquid in the liquid circuit. Since the rotating parts are generally metallic, the particles resulting from wear of the parts are conductive and are generally in the form of filings. What is more, the parts are most often made of a ferromagnetic type metal such as iron, that is to say able to be attracted by a magnetic element such as a magnet.
De manière connue et tel qu'illustré schématiquement en figure 1 , un bouchon magnétique 1 comporte à une extrémité une tête ou support 2 et un aimant permanent formé par un barreau magnétique 3 plongé dans le circuit de liquide, ledit barreau 3 attirant les particules métalliques 4 lors de la circulation du liquide. In known manner and as schematically illustrated in FIG. 1, a magnetic plug 1 comprises at one end a head or support 2 and a permanent magnet formed by a magnetic bar 3 immersed in the circuit liquid, said bar 3 attracting the metal particles 4 during the circulation of the liquid.
Les opérateurs sur site doivent alors vérifier périodiquement l'état de ces bouchons magnétiques, prélever les particules piégées sur le barreau magnétique et faire analyser ces particules, par exemple par des analyses du type microscopie électronique à balayage MEB et spectroscopie EDS (« Energy Dispersive Spectroscopy » en anglais). A partir de ces analyses, il est possible d'identifier la nature et la géométrie des particules prélevées ; en fonction du lieu de prélèvement du bouchon, on peut alors circonscrire le ou les éléments affectés par l'usure et prendre les mesures qui garantiront l'intégrité de la machine et la sécurité du vol. On notera que les bouchons magnétiques sont le plus souvent couplés avec des filtres, ces derniers servant à piéger les particules non ferromagnétiques.  The operators on site must then periodically check the state of these magnetic plugs, collect particles trapped on the magnetic bar and have these particles analyzed, for example by scanning electron microscopy SEM and EDS spectroscopy ("Energy Dispersive Spectroscopy") analyzes. " in English). From these analyzes, it is possible to identify the nature and geometry of the particles collected; depending on the location of the plug, we can then identify the element or elements affected by wear and take measures that will ensure the integrity of the machine and flight safety. It should be noted that magnetic plugs are most often coupled with filters, the latter being used to trap non-ferromagnetic particles.
On connaît différentes techniques permettant aux opérateurs de prélever les particules piégées sur le bouchon magnétique.  Various techniques are known that allow the operators to collect the particles trapped on the magnetic plug.
Une première technique consiste à utiliser un ruban adhésif que l'opérateur met en contact avec le barreau magnétique du bouchon.  A first technique is to use an adhesive tape that the operator puts in contact with the magnetic bar of the plug.
Une telle solution n'est pas entièrement satisfaisante dans la mesure où les particules restent collées sur l'adhésif et difficile à extraire (par dissolution) pour l'analyse. Il demeure donc un reliquat de particules inexploitables pour l'analyse qui entraîne une perte d'informations. En outre, l'adhésif peut générer une pollution de surface des particules susceptible de fausser les résultats de l'analyse de matière.  Such a solution is not entirely satisfactory insofar as the particles remain stuck on the adhesive and difficult to extract (by dissolution) for the analysis. It remains a residue of unusable particles for analysis that results in a loss of information. In addition, the adhesive can generate surface pollution of the particles that can distort the results of the material analysis.
Une seconde technique consiste à utiliser un chiffon pour prélever les particules sur le barreau magnétique.  A second technique is to use a cloth to collect the particles on the magnetic bar.
Une telle solution pose également certaines difficultés. En effet, il est nécessaire de nettoyer le chiffon en l'immergeant dans un solvant puis de filtrer le produit obtenu pour récupérer les particules. Par ailleurs, l'utilisation d'un chiffon rend difficile la récupération de l'intégralité des particules ; dès lors, la totalité des particules n'est plus disponible pour réaliser l'analyse et un reliquat de particules reste présent sur le barreau magnétique, ce reliquat étant susceptible de fausser l'indication de pollution lors d'un contrôle ultérieur. Enfin, l'utilisation d'un chiffon potentiellement pollué peut entraîner une suspicion de pollution parasite. Such a solution also poses certain difficulties. Indeed, it is necessary to clean the cloth by immersing it in a solvent and then filter the product obtained to recover the particles. Moreover, the use of a cloth makes it difficult to recover all the particles; therefore, all the particles are no longer available to perform the analysis and a residue of particles remains present on the magnetic bar, this residue being likely to distort the indication of pollution during a subsequent inspection. Finally, the use of a potentially polluted cloth may lead to a suspicion of parasitic pollution.
Une troisième technique peut consister à prélever directement les particules sur le barreau à l'aide d'un aimant plus puissant que l'aimant du barreau magnétique.  A third technique may be to directly collect the particles on the bar with a magnet more powerful than the magnet of the magnetic bar.
Une telle solution est toutefois difficilement exploitable car elle entraînerait un risque d'altération du bouchon magnétique par modification du champ rémanent de ce dernier.  Such a solution is however difficult to exploit because it would lead to a risk of alteration of the magnetic plug by changing the residual field of the latter.
L'invention a donc plus particulièrement pour but de remédier aux inconvénients précités. Dans ce contexte, la présente invention vise à fournir un dispositif permettant une récupération rapide, fiable et complète des particules magnétiques piégées sur un bouchon magnétique.  The invention therefore more particularly aims to overcome the aforementioned drawbacks. In this context, the present invention aims to provide a device for a fast, reliable and complete recovery of magnetic particles trapped on a magnetic plug.
A cette fin, l'invention porte sur un dispositif de récupération de particules magnétiques piégées sur un bouchon magnétique, ledit bouchon magnétique comportant une extrémité support et un élément aimanté destiné à retenir les particules magnétiques entraînées par un liquide et résultant de l'usure de pièces avec lesquelles ledit liquide a été en contact, ledit dispositif de récupération comportant :  To this end, the invention relates to a magnetic particle recovery device trapped on a magnetic plug, said magnetic plug having a support end and a magnetic element for retaining the magnetic particles entrained by a liquid and resulting from the wear of parts with which said liquid has been in contact, said recovery device comprising:
- des moyens d'aimantation ;  - magnetization means;
- une enceinte intégrant :  an enclosure integrating:
o une ouverture, ladite enceinte étant apte à recevoir ledit bouchon magnétique via ladite ouverture de sorte que ledit élément aimanté soit logé à l'intérieur de ladite enceinte et ladite extrémité support se situe à l'extérieur de ladite enceinte, ladite ouverture étant dimensionnée de sorte que ladite extrémité support obture ladite ouverture ;  an opening, said enclosure being able to receive said magnetic plug via said opening so that said magnetized element is housed inside said enclosure and said support end is located outside said enclosure, said opening being dimensioned with so that said support end closes said opening;
o au moins une buse d'injection apte à injecter un fluide gazeux à l'intérieur de ladite enceinte, ladite buse étant orientée de sorte que le flux de fluide gazeux chasse les particules magnétiques retenues sur ledit élément aimanté vers le fond de ladite enceinte, lesdits moyens d'aimantation étant agencés pour piéger par aimantation lesdites particules chassées vers le fond de ladite enceinte. at least one injection nozzle capable of injecting a gaseous fluid inside said enclosure, said nozzle being oriented so that the flow of gaseous fluid expels the magnetic particles retained on said magnetic element towards the bottom of said enclosure, said magnetization means being arranged to trap by magnetization said particles driven to the bottom of said enclosure.
Grâce à l'invention, on utilise une injection sous pression de gaz (préférentiellement de l'air comprimé filtré et déshuilé, injecté par exemple à 6 bars) via au moins une buse. Le flux de gaz va permettre de détacher les particules magnétiques se trouvant sur le bouchon magnétique et d'envoyer ces particules au fond de l'enceinte du dispositif. La présence de moyens d'aimantation agencés préférentiellement à proximité du fond de l'enceinte et à l'extérieur de celle-ci va permettre le piégeage de ces particules (i.e. les particules ne peuvent pas remonter puisqu'elles sont piégées par les moyens d'aimantation). Le dispositif selon l'invention est donc un outillage à destination des opérateurs permettant de récupérer de façon fiabilisée l'intégralité des particules magnétiques, ces dernières étant désolidarisées du bouchon magnétique sous l'effet d'un jet d'air lorsque le bouchon est placé dans l'enceinte de l'outillage.  Thanks to the invention, a pressure injection of gas is used (preferably filtered and deoiled compressed air, injected for example at 6 bar) via at least one nozzle. The flow of gas will allow to detach the magnetic particles on the magnetic plug and send these particles to the bottom of the device enclosure. The presence of magnetization means preferentially arranged near the bottom of the enclosure and outside thereof will allow the trapping of these particles (ie the particles can not rise because they are trapped by the means of magnetization). The device according to the invention is therefore a tool for operators to reliably recover all the magnetic particles, the latter being separated from the magnetic plug under the effect of an air jet when the plug is placed in the enclosure of the tooling.
Outre les caractéristiques principales qui viennent d'être mentionnées dans le paragraphe précédent, le dispositif selon l'invention peut présenter une ou plusieurs caractéristiques supplémentaires ci-dessous, considérées individuellement ou selon toutes les combinaisons techniquement possibles :  In addition to the main features which have just been mentioned in the preceding paragraph, the device according to the invention may have one or more additional characteristics below, considered individually or in any technically possible combination:
- le dispositif selon l'invention comporte une pluralité de buses d'injection montées sur ladite enceinte ;  the device according to the invention comprises a plurality of injection nozzles mounted on said enclosure;
- ledit élément aimanté dudit bouchon magnétique est un barreau magnétique ; ladite enceinte est dimensionnée pour recevoir ledit barreau magnétique à l'intérieur de ladite enceinte et lesdites buses sont disposées latéralement sur ladite enceinte de sorte qu'elles se situent de part et d'autre dudit barreau lorsque ce dernier est en position à l'intérieur de ladite enceinte ;  said magnetic element of said magnetic plug is a magnetic bar; said enclosure is dimensioned to receive said magnetic bar inside said enclosure and said nozzles are disposed laterally on said enclosure so that they are located on either side of said bar when the latter is in position inside said enclosure;
- chacune desdites buses est inclinée de 45 ° par rapport à l'axe du barreau lorsque ce dernier est en position à l'intérieur de ladite enceinte ; - lesdits moyens d'aimantation sont disposés à l'extérieur de ladite enceinte à proximité du fond de ladite enceinte ; each of said nozzles is inclined by 45 ° with respect to the axis of the bar when the latter is in position inside said enclosure; said magnetization means are disposed outside said enclosure near the bottom of said enclosure;
- lesdits moyens d'aimantation sont montés de façon amovible sur la face externe du fond de ladite enceinte ;  said magnetization means are removably mounted on the outer face of the bottom of said enclosure;
- lesdits moyens d'aimantation sont agencés de façon à être situés à une distance comprise entre 2 et 5 cm dudit élément aimanté lorsque ce dernier est à l'intérieur de ladite enceinte ;  said magnetization means are arranged to be situated at a distance of between 2 and 5 cm from said magnetized element when the latter is inside said enclosure;
- le dispositif selon l'invention comporte des moyens d'étanchéité tels qu'un joint torique aptes à assurer l'étanchéité entre ladite extrémité support et ladite ouverture lorsque ladite extrémité support obture ladite ouverture.  - The device according to the invention comprises sealing means such as an O-ring capable of sealing between said support end and said opening when said support end closes said opening.
L'invention a également pour objet un procédé de récupération de particules magnétiques piégées sur un bouchon magnétique à l'aide d'un dispositif selon l'invention, ledit procédé comportant les étapes suivantes :  The subject of the invention is also a process for recovering magnetic particles trapped on a magnetic plug by means of a device according to the invention, said method comprising the following steps:
- mise en place du bouchon magnétique dans le dispositif de récupération via l'ouverture de l'enceinte de sorte que l'élément aimanté du bouchon retenant les particules magnétiques soit logé à l'intérieur de l'enceinte et l'extrémité support du bouchon soit située à l'extérieur de l'enceinte de façon à obturer l'ouverture de l'enceinte ; - Placing the magnetic plug in the recovery device via the opening of the enclosure so that the magnetic element of the cap holding the magnetic particles is housed inside the enclosure and the end support of the cap is located outside the enclosure so as to close the opening of the enclosure;
- injection d'air comprimé préférentiellement filtré via la ou les buses d'injection de sorte que les particules retenues sur l'élément magnétique soient évacuées vers le fond de l'enceinte ; - Injection of compressed air preferentially filtered via the injection nozzle or nozzles so that the particles retained on the magnetic element are discharged to the bottom of the enclosure;
- piégeage des particules évacuées vers le fond de l'enceinte par lesdits moyens d'aimantation ;  trapping of the particles evacuated towards the bottom of the enclosure by said magnetization means;
- récupération des particules piégées par lesdits moyens d'aimantation.  recovery of particles trapped by said magnetization means.
Avantageusement, l'étape de récupération des particules comporte les étapes suivantes :  Advantageously, the particle recovery step comprises the following steps:
- retrait du bouchon magnétique et des moyens d'aimantation montés de manière amovible sous le fond de l'enceinte ;  - Removal of the magnetic plug and magnetization means removably mounted under the bottom of the enclosure;
- récupération des particules à l'aide d'un barreau aimanté monté coulissant dans un tube. D'autres caractéristiques et avantages de l'invention ressortiront clairement de la description qui en est donnée ci-après, à titre indicatif et nullement limitatif, en référence aux figures annexées ci-jointes parmi lesquelles : - Particle recovery using a magnetic bar slidably mounted in a tube. Other features and advantages of the invention will emerge clearly from the description which is given below, by way of indication and in no way limitative, with reference to the appended figures in which:
- la figure 1 représente, de façon schématique, un bouchon magnétique ;  - Figure 1 shows, schematically, a magnetic plug;
- la figure 2 représente, de façon schématique, un dispositif de récupération de particules selon l'invention ;  - Figure 2 shows schematically a particle recovery device according to the invention;
- les figures 3 à 7 illustrent les différentes étapes d'un procédé de récupération de particules selon l'invention ;  FIGS. 3 to 7 illustrate the different steps of a particle recovery process according to the invention;
- la figure 8 représente l'enchaînement des étapes illustrées aux figures 3 à 7.  - Figure 8 shows the sequence of steps illustrated in Figures 3 to 7.
Pour des raisons de clarté, seuls les éléments utiles pour la compréhension de l'invention ont été représentés, et ceci sans respect de l'échelle et de manière schématique. En outre, les éléments similaires situés sur différentes figures comportent des références identiques.  For the sake of clarity, only the elements useful for understanding the invention have been shown, and this without regard to the scale and in a schematic manner. In addition, the similar elements in different figures have identical references.
La figure 1 a déjà été décrite en référence à l'état de la technique. La figure 2 représente schématiquement un dispositif 100 de récupération de particules magnétiques selon l'invention.  Figure 1 has already been described with reference to the state of the art. FIG. 2 diagrammatically represents a device 100 for recovering magnetic particles according to the invention.
Le dispositif 100 selon l'invention comporte :  The device 100 according to the invention comprises:
- une enceinte 101 en T munie d'une ouverture 102 sur sa partie supérieure et d'un réceptacle sensiblement cylindrique 108 d'axe vertical 00' ;  an enclosure 101 in T provided with an opening 102 on its upper part and a substantially cylindrical receptacle 108 of vertical axis 00 ';
- des moyens d'étanchéité 103 sous la forme d'un joint torique disposé autour de l'ouverture 102 ;  sealing means 103 in the form of an O-ring disposed around the opening 102;
une pluralité de buses d'injection 104 traversant les parties latérales de l'enceinte 101 ;  a plurality of injection nozzles 104 passing through the side portions of the enclosure 101;
- un support 105 agencé au contact de la surface externe du fond de l'enceinte 01 ;  a support 105 arranged in contact with the external surface of the bottom of the enclosure 01;
- un aimant cylindrique 106 monté de façon amovible dans le support 105 ; - un tuyau d'évent 1 07. a cylindrical magnet 106 removably mounted in the support 105; - a vent pipe 1 07.
Chacune des buses 1 04 est inclinée d'un angle de 45 ° par rapport à l'axe vertical 00'.  Each of the nozzles 104 is inclined at an angle of 45 ° with respect to the vertical axis 00 '.
L'enceinte 1 01 peut être réalisée dans un matériau plastique transparent.  The enclosure 1 01 may be made of a transparent plastic material.
Nous allons décrire en référence aux figures 3 à 7 un exemple de procédé de récupération de particules ferromagnétiques piégées sur un bouchon magnétique 1 tel que celui représenté en figure 1 à l'aide du dispositif de récupération 1 00 selon l'invention tel que représenté en figure 2. La figure 8 représente l'enchainement des étapes 201 à 205 du procédé 200. On notera que ces étapes 201 à 205 seront préférentiellement mises en oeuvre sur site par un opérateur.  3 to 7, an example of a method for recovering ferromagnetic particles trapped on a magnetic plug 1 such as that represented in FIG. 1 by means of the recovery device 100 according to the invention as represented in FIG. Figure 2. Figure 8 shows the sequence of steps 201 to 205 of the method 200. It will be noted that these steps 201 to 205 will preferably be implemented on site by an operator.
Selon la première étape 201 illustrée en figure 3, le bouchon magnétique 1 , après avoir été récupéré par l'opérateur pour analyse des particules 4 piégées, est mis en place dans le dispositif 100. Plus précisément, le barreau magnétique 3 (sur lequel les particules magnétiques 4 sont retenues) est inséré dans l'enceinte 1 01 et l'extrémité support 2 (ou tête) du bouchon 1 vient obturer l'ouverture 1 02. L'ouverture 102 du dispositif 1 doit donc être dimensionnée pour que son diamètre soit inférieur au diamètre de la tête 2 du bouchon 1 .  According to the first step 201 illustrated in FIG. 3, the magnetic plug 1, after having been recovered by the operator for analysis of the trapped particles 4, is put into place in the device 100. More specifically, the magnetic bar 3 (on which the magnetic particles 4 are retained) is inserted into the chamber 1 01 and the support end 2 (or head) of the plug 1 closes the opening 1 02. The opening 102 of the device 1 must be dimensioned so that its diameter is smaller than the diameter of the head 2 of the plug 1.
Le joint torique 1 03 assure l'étanchéité entre l'extrémité support 2 et l'ouverture 1 02.  The O-ring 1 03 seals between the support end 2 and the opening 1 02.
Selon la deuxième étape 202 illustrée en figure 4, on injecte, pendant quelques secondes, via les buses 1 04, de l'air comprimé filtré et déshuilé (pour éviter toute pollution des particules 4) à l'intérieur de l'enceinte 1 01 . L'inclinaison à 45 ° par rapport à l'axe vertical des buses 1 04 permet de diriger le jet d'air comprimé vers l'extrémité du barreau magnétique 3 sur lequel sont retenues les particules 4. L'ensemble des particules 4 se trouvant sur le barreau 3 sont dés lors chassées vers le fond de l'enceinte 101 et sont piégées par l'aimant 1 06 qui est suffisamment puissant pour les retenir au fond de l'enceinte 1 01 et éviter qu'elles ne remontent vers le haut de l'enceinte. According to the second step 202 illustrated in FIG. 4, filtered compressed and deoiled air (to prevent any pollution of the particles 4) inside the enclosure 1 01 is injected for a few seconds via the nozzles 1 04. . The inclination at 45 ° with respect to the vertical axis of the nozzles 1 04 makes it possible to direct the jet of compressed air towards the end of the magnetic bar 3 on which the particles 4 are retained. The set of particles 4 being found on the bar 3 are now driven to the bottom of the enclosure 101 and are trapped by the magnet 1 06 which is powerful enough to hold them at the bottom of the enclosure 1 01 and avoid that they go up to the top of the enclosure.
Dans la mesure où une injection d'air comprimé est effectuée au sein de l'enceinte 1 01 , une mise à l'air libre est assurée par le tuyau d'évent 1 07 afin d'éviter une surpression.  Insofar as an injection of compressed air is carried out within the enclosure 1 01, venting is provided by the vent pipe 1 07 to avoid overpressure.
On choisira de préférence un aimant 06 présentant une aimantation (comprise typiquement entre 50 et 1 00 A/m) plus puissante que celle de l'aimant permanent du bouchon (comprise généralement entre 25 et 30 A/m). En outre, la hauteur de l'enceinte 1 01 est ajustée de sorte que la distance d séparant l'aimant 106 de l'extrémité du barreau magnétique 3 soit comprise entre 2 et 5 cm : cette distance d est suffisante pour que l'aimantation de l'aimant 106 ne perturbe pas l'aimantation du barreau 3 qui doit demeurer sensiblement constante pour une utilisation ultérieure.  We will preferably choose a magnet 06 having a magnetization (typically between 50 and 1 00 A / m) more powerful than that of the permanent magnet of the plug (generally between 25 and 30 A / m). In addition, the height of the enclosure 1 01 is adjusted so that the distance d between the magnet 106 of the end of the magnetic bar 3 is between 2 and 5 cm: this distance d is sufficient for the magnetization of the magnet 106 does not disturb the magnetization of the bar 3 which must remain substantially constant for later use.
Selon l'étape 203 illustrée en figure 5, on extrait le bouchon magnétique 1 du dispositif 1 00 selon l'invention puis on retire l'aimant 1 06 du support 1 05 (pour mémoire, l'aimant 1 06 est monté amovible sur le support 105), les particules 4 se trouvant toujours au fond de l'enceinte 101 .  According to the step 203 illustrated in FIG. 5, the magnetic plug 1 is extracted from the device 1 00 according to the invention and then the magnet 1 06 is removed from the support 1 05 (for the memory, the magnet 1 06 is removably mounted on the support 105), the particles 4 always being at the bottom of the chamber 101.
L'étape 204 illustrée en figure 6 va consister à récupérer les particules 4 au fond du réceptacle 0 . Pour ce faire, on utilise par exemple un cylindre 1 1 2 en cuivre coulissant dans un tube 1 1 1 en verre et muni à son extrémité inférieure d'un aimant 1 1 0. En plongeant au fond de l'enceinte 1 01 le cylindre 1 1 2 inséré dans le tube 1 1 1 , les particules 4 sont aimantées par l'aimant 1 1 0.  Step 204 illustrated in FIG. 6 will consist in recovering the particles 4 at the bottom of the receptacle 0. To do this, use is made for example of a cylinder 1 1 2 made of copper sliding in a tube 1 1 1 glass and provided at its lower end with a magnet 1 1 0. Plunging to the bottom of the enclosure 1 01 the cylinder 1 1 2 inserted in the tube 1 1 1, the particles 4 are magnetized by the magnet 1 1 0.
Selon l'étape 205 illustrée en figure 7, on récupère alors les particules 4 dans un sachet plastiquel 1 3 en faisant coulisser vers le haut (dans le sens de la flèche) le cylindre 1 12 dans le tube 1 1 1 ; le fait de faire remonter le cylindre 1 12 supprime le champ magnétique exercé par l'aimant 1 10 sur les particules 4. Le sachet 1 13 peut ensuite être transmis par l'opérateur à un laboratoire pour analyse des particules 4.  According to step 205 illustrated in FIG. 7, the particles 4 are then recovered in a plastic bag 1 3 by sliding upwards (in the direction of the arrow) the cylinder 1 12 in the tube 1 1 1; raising the cylinder 1 12 removes the magnetic field exerted by the magnet 1 10 on the particles 4. The bag 1 13 can then be transmitted by the operator to a laboratory for particle analysis 4.
Bien entendu, l'invention n'est pas limitée au mode de réalisation qui vient d'être décrit. Notamment, l'étape de récupération des particules au fond de l'enceinte du dispositif selon l'invention a été décrite dans le cadre de l'utilisation d'un cylindre coulissant dans un tube. Il est également parfaitement possible de récupérer les particules en retournant le dispositif selon l'invention afin de transférer directement les particules (qui ne sont plus piégées par l'aimant 106 préalablement retiré) dans un sachet. Of course, the invention is not limited to the embodiment just described. In particular, the particle recovery step at the bottom of the enclosure of the device according to the invention has been described in the context of the use of a sliding cylinder in a tube. It is also perfectly possible to recover the particles by inverting the device according to the invention in order to directly transfer the particles (which are no longer trapped by the magnet 106 previously removed) in a bag.
De même, le dispositif a été décrit plus spécifiquement avec un aimant 106 amovible. On peut également utiliser un électroaimant non amovible dont l'aimantation sera contrôlée selon que l'on souhaite ou non maintenir les particules piégées.  Similarly, the device has been described more specifically with a removable magnet 106. It is also possible to use a non-removable electromagnet whose magnetization will be controlled according to whether or not it is desired to maintain the trapped particles.
Par ailleurs, même si le dispositif comporte préférentiellement une pluralité de buses réparties autour de l'enceinte, on peut également envisager de n'utiliser qu'une seule buse d'injection en faisant tourner le bouchon à l'intérieur du dispositif selon l'invention de façon à ce que le jet d'air comprimé atteigne toute la surface du barreau sur laquelle les particules sont piégées.  Furthermore, even if the device preferably comprises a plurality of nozzles distributed around the enclosure, it is also conceivable to use only one injection nozzle by rotating the plug inside the device according to the invention. invention so that the jet of compressed air reaches the entire surface of the bar on which the particles are trapped.
Le dispositif selon l'invention qui vient d'être décrit trouve une application particulièrement intéressante dans un emploi avec des bouchons magnétiques utilisés sur toutes les machines pour lesquelles il est important de pouvoir détecter une usure, notamment sur les turbomachines aéronautiques. Sur ces dernières, l'utilisation de plusieurs bouchons magnétiques, sur les différents circuits d'huile, peut permettre de localiser rapidement une pièce présentant un début d'usure.  The device according to the invention which has just been described finds a particularly interesting application in use with magnetic plugs used on all machines for which it is important to be able to detect wear, especially on aircraft turbomachines. On the latter, the use of several magnetic plugs, on the various oil circuits, can quickly locate a part with a beginning of wear.

Claims

REVENDICATIONS
Dispositif (100) de récupération de particules magnétiques (4) piégées sur un bouchon magnétique (1 ), ledit bouchon magnétique (1 ) comportant une extrémité support (2) et un élément aimanté (3) destiné à retenir les particules magnétiques (4) entraînées par un liquide et résultant de l'usure de pièces avec lesquelles ledit liquide a été en contact, ledit dispositif (100) de récupération comportant : Device (100) for recovering magnetic particles (4) trapped on a magnetic plug (1), said magnetic plug (1) having a support end (2) and a magnetic element (3) for retaining the magnetic particles (4) entrained by a liquid and resulting from the wear of parts with which said liquid has been in contact, said recovery device (100) comprising:
des moyens d'aimantation (106) ;  magnetization means (106);
une enceinte (101 ) intégrant :  an enclosure (101) incorporating:
o une ouverture (102), ladite enceinte (101 ) étant apte à recevoir ledit bouchon magnétique (1 ) via ladite ouverture (102) de sorte que ledit élément aimanté (3) soit logé à l'intérieur de ladite enceinte (101 ) et ladite extrémité support (2) se situe à l'extérieur de ladite enceinte (101 ), ladite ouverture (102) étant dimensionnée de sorte que ladite extrémité support (2) obture ladite ouverture (102) ;  an opening (102), said enclosure (101) being able to receive said magnetic plug (1) via said opening (102) so that said magnetic element (3) is housed inside said enclosure (101) and said support end (2) is located outside said enclosure (101), said opening (102) being dimensioned so that said support end (2) closes said opening (102);
o au moins une buse d'injection (104) apte à injecter un fluide gazeux à l'intérieur de ladite enceinte (101 ), ladite buse (104) étant orientée de sorte que le flux de fluide gazeux chasse les particules magnétiques (4) retenues sur ledit élément aimanté (3) vers le fond de ladite enceinte (101 ), lesdits moyens d'aimantation (106) étant agencés pour piéger par aimantation lesdites particules (4) chassées vers le fond de ladite enceinte (101 ).  at least one injection nozzle (104) capable of injecting a gaseous fluid inside said enclosure (101), said nozzle (104) being oriented so that the flow of gaseous fluid expels the magnetic particles (4) retained on said magnetic element (3) towards the bottom of said enclosure (101), said magnetization means (106) being arranged to magnetize trapping said particles (4) driven towards the bottom of said enclosure (101).
2. Dispositif (100) selon la revendication précédente caractérisé en ce qu'il comporte une pluralité de buses d'injection (104) montées sur ladite enceinte (101 ). 2. Device (100) according to the preceding claim characterized in that it comprises a plurality of injection nozzles (104) mounted on said enclosure (101).
3. Dispositif (100) selon la revendication précédente, ledit élément aimanté (3) dudit bouchon magnétique (1 ) étant un barreau magnétique (3), ledit dispositif (100) étant caractérisé en ce que ladite enceinte (100) est dimensionnée pour recevoir ledit barreau magnétique (3) à l'intérieur de ladite enceinte (101 ) et lesdites buses3. Device (100) according to the preceding claim, said magnetic element (3) of said magnetic plug (1) being a magnetic bar (3), said device (100) being characterized in that said enclosure (100) is sized to receive said magnetic bar (3) inside said enclosure (101) and said nozzles
(104) sont disposées latéralement sur ladite enceinte (101 ) de sorte qu'elles se situent de part et d'autre dudit barreau (3) lorsque ce dernier est en position à l'intérieur de ladite enceinte (101 ). (104) are disposed laterally on said enclosure (101) so that they are located on either side of said bar (3) when the latter is in position inside said enclosure (101).
Dispositif (100) selon la revendication précédente caractérisé en ce que chacune desdites buses (104) est inclinée de 45° par rapport à l'axe (ΟΟ') du barreau (3) lorsque ce dernier est en position à l'intérieur de ladite enceinte (101 ). Device (100) according to the preceding claim characterized in that each of said nozzles (104) is inclined by 45 ° relative to the axis (ΟΟ ') of the bar (3) when the latter is in position inside said enclosure (101).
Dispositif (100) selon l'une des revendications précédentes caractérisé en ce que lesdits moyens d'aimantation (106) sont disposés à l'extérieur de ladite enceinte (101 ) à proximité du fond de ladite enceinte (101 ). Device (100) according to one of the preceding claims characterized in that said magnetization means (106) are disposed outside said enclosure (101) close to the bottom of said enclosure (101).
Dispositif (100) selon l'une des revendications précédentes caractérisé en ce que lesdits moyens d'aimantation (106) sont montés de façon amovible sur la face externe du fond de ladite enceinte (101 ). Device (100) according to one of the preceding claims characterized in that said magnetization means (106) are removably mounted on the outer face of the bottom of said enclosure (101).
Dispositif (100) selon l'une des revendications précédentes caractérisé en ce que lesdits moyens d'aimantation (106) sont agencés de façon à être situés à une distance comprise entre 2 et 5 cm dudit élément aimanté (3) lorsque ce dernier est à l'intérieur de ladite enceinte (101 ). 8. Dispositif (100) selon l'une des revendications précédentes caractérisé en ce qu'il comporte des moyens d'étanchéité (103) tels qu'un joint torique aptes à assurer l'étanchéité entre ladite extrémité support (2) et ladite ouverture (101 ) lorsque ladite extrémité support (2) obture ladite ouverture (101 ). Device (100) according to one of the preceding claims characterized in that said magnetization means (106) are arranged to be located at a distance between 2 and 5 cm of said magnet element (3) when the latter is at inside said enclosure (101). 8. Device (100) according to one of the preceding claims characterized in that it comprises sealing means (103) such an O-ring capable of sealing between said support end (2) and said opening (101) when said support end (2) closes said opening (101).
Procédé (200) de récupération de particules magnétiques piégées sur un bouchon magnétique à l'aide d'un dispositif selon l'une des revendications précédentes, ledit procédé comportant les étapes suivantes : Method (200) for recovering magnetic particles trapped on a magnetic plug using a device according to one of the preceding claims, said method comprising the following steps:
- mise en place (201 ) du bouchon magnétique dans le dispositif de récupération via l'ouverture de l'enceinte de sorte que l'élément aimanté du bouchon retenant les particules magnétiques soit logé à l'intérieur de l'enceinte et l'extrémité support du bouchon soit située à l'extérieur de l'enceinte de façon à obturer l'ouverture de l'enceinte ;  placing (201) the magnetic plug in the recovery device via the opening of the enclosure so that the magnetic element of the plug holding the magnetic particles is housed inside the enclosure and the end plug support is located outside the enclosure so as to close the opening of the enclosure;
- injection (202) d'air comprimé préférentiellement filtré via la ou les buses d'injection de sorte que les particules retenues sur l'élément magnétique soient évacuées vers le fond de l'enceinte ;  injecting (202) compressed air preferentially filtered via the injection nozzle (s) so that the particles retained on the magnetic element are evacuated towards the bottom of the enclosure;
- piégeage (202) des particules évacuées vers le fond de l'enceinte par lesdits moyens d'aimantation ;  trapping (202) of the particles discharged towards the bottom of the enclosure by said magnetization means;
- récupération (203, 204, 205) des particules piégées par lesdits moyens d'aimantation.  recovering (203, 204, 205) particles trapped by said magnetization means.
10. Procédé selon la revendication précédente caractérisé en ce que l'étape de récupération (203, 204, 205) des particules comporte les étapes suivantes : 10. Method according to the preceding claim characterized in that the step of recovering (203, 204, 205) particles comprises the following steps:
- retrait (203) du bouchon magnétique et des moyens d'aimantation montés de manière amovible sous le fond de l'enceinte ;  - Removal (203) of the magnetic cap and magnetization means removably mounted under the bottom of the enclosure;
- récupération (204) des particules à l'aide d'un barreau aimanté monté coulissant dans un tube.  - Recovery (204) of the particles with a magnetic bar slidably mounted in a tube.
EP10776619.8A 2009-10-30 2010-10-22 Device and method for recovering magnetic particles trapped on a magnetic plug Active EP2493623B1 (en)

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FR0957682A FR2951961B1 (en) 2009-10-30 2009-10-30 DEVICE AND METHOD FOR RECOVERING MAGNETIC PARTICLES SPILLED ON A MAGNETIC CAP
PCT/EP2010/066000 WO2011051192A1 (en) 2009-10-30 2010-10-22 Device and method for recovering magnetic particles trapped on a magnetic plug

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CA2778856A1 (en) 2011-05-05
FR2951961B1 (en) 2011-11-04
BR112012010100A2 (en) 2017-06-27
BR112012010100B1 (en) 2019-11-26
US20120204910A1 (en) 2012-08-16
CA2778856C (en) 2017-06-13
US9248454B2 (en) 2016-02-02
WO2011051192A1 (en) 2011-05-05
RU2541685C2 (en) 2015-02-20
ES2726428T3 (en) 2019-10-04
FR2951961A1 (en) 2011-05-06
CN102596416A (en) 2012-07-18
RU2012122212A (en) 2013-12-10
EP2493623B1 (en) 2019-04-03
CN102596416B (en) 2015-02-25

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