EP0218882B1 - Dispositif de triage de particules métalliques - Google Patents

Dispositif de triage de particules métalliques Download PDF

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Publication number
EP0218882B1
EP0218882B1 EP86112134A EP86112134A EP0218882B1 EP 0218882 B1 EP0218882 B1 EP 0218882B1 EP 86112134 A EP86112134 A EP 86112134A EP 86112134 A EP86112134 A EP 86112134A EP 0218882 B1 EP0218882 B1 EP 0218882B1
Authority
EP
European Patent Office
Prior art keywords
socket
conveyor
conveyed
ejector
metal detector
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.)
Expired
Application number
EP86112134A
Other languages
German (de)
English (en)
Other versions
EP0218882A2 (fr
EP0218882A3 (en
Inventor
Guntram Kind
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.)
Pulsotronic Merten GmbH and Co KG
Original Assignee
Pulsotronic Merten GmbH and Co KG
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 Pulsotronic Merten GmbH and Co KG filed Critical Pulsotronic Merten GmbH and Co KG
Publication of EP0218882A2 publication Critical patent/EP0218882A2/fr
Publication of EP0218882A3 publication Critical patent/EP0218882A3/de
Application granted granted Critical
Publication of EP0218882B1 publication Critical patent/EP0218882B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/36—Sorting apparatus characterised by the means used for distribution
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/34—Sorting according to other particular properties
    • B07C5/344—Sorting according to other particular properties according to electric or electromagnetic properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C2501/00—Sorting according to a characteristic or feature of the articles or material to be sorted
    • B07C2501/0036—Sorting out metallic particles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S209/00—Classifying, separating, and assorting solids
    • Y10S209/906—Pneumatic or liquid stream feeding item

Definitions

  • the invention relates to a device for sorting out metal particles from a conveyed material flow, e.g. a regrind or granulate stream, according to the preamble of claim 1.
  • the delay device is formed by at least one deflection or bend of the delivery line between the metal detector and the sorting device.
  • the delivery line consists of a shaft, from the opposite walls of which several baffle plates protrude downwards, which partially overlap, and result in a delivery line with a serpentine profile.
  • the material to be conveyed slips over the baffle plates and falls on the opposite lower baffle plate when leaving a baffle plate, only relatively short sections with free fall being present.
  • the advantage of the known device is a reduction in the overall length, as a result of which the device can be made compact and overall fits into a handy housing.
  • Such a device can be easily installed in a suction or pressure delivery system. Due to the relatively strong curvature of the delivery line, congestion of the material to be conveyed can occur in the device. Furthermore, due to the vertical installation position of the device with horizontal conveyance, a relatively large offset between the incoming and outgoing part of the delivery line must be accepted, which can only be compensated for by several pipe bends. Special care must therefore be taken when laying the delivery line in order to avoid congestion in the delivery line.
  • the object of the invention is to improve the device of the type described above with regard to the delay device, in particular to avoid congestion of the conveyed material in the device.
  • the material to be conveyed is swirled in the cyclone-like swirl chamber, so that the friction losses are relatively low.
  • the swirl can be spiral or helical.
  • There is a non-line-based guidance of the conveyed material which means that the conveyed material is in the swirl chamber longer than with a straight pipe guide. This measure prevents congestion of the conveyed material in the device.
  • the swirl chamber can consist of a cylindrical upper part and a funnel-shaped lower part, the flow being introduced tangentially into the cylindrical part. Due to the centrifugal and gravitational force acting on the flow, a swirl flow is formed, through which the conveying path of the material to be conveyed is extended, so that the metal detector can be arranged in the immediate vicinity of the swirl chamber.
  • the funnel serves as a collector of the material to be conveyed, so that continuous conveying through the delivery nozzle can take place. Conversely, identified conveyed material contaminated by metal particles can leave the device in free fall.
  • a suction device to the ejection nozzle via a failure container, which accelerates the separation process and prevents air from entering the delivery line, for example, during suction delivery, which interferes with the delivery process.
  • the ejection nozzle and the failure container it is possible to design the ejection nozzle and the failure container as a bypass to the delivery line, so that an additional suction device is unnecessary.
  • the functional reliability of the device is improved since the slide is installed transversely to the flow and thus prevents material or metal particles from getting stuck in the sorting device.
  • Both nozzles are controlled by a slide each, but operated by a common drive mechanism.
  • the second metal detector opens the air inlet valve, so that the delivery breaks down in the outgoing part of the delivery line.
  • the metal particle can be removed, for example, from the ejection nozzle using a pig or pipe broom.
  • the device shown in the figures of the drawing serves to separate metallic contaminants, such as chips, screws, nuts and the like, contained in powdery, granular or lumpy conveyed material, such as flour, sugar, tablets or granules.
  • the device consists of a vortex chamber, generally designated 7, with an upper cylindrical part 8 and a lower funnel-shaped part 9.
  • the upper cylindrical part 8 is closed by a cover 10, while an angled piece is connected to the lower funnel-shaped part 9, which comes from the delivery nozzle 11 and the ejection nozzle 12 there.
  • the delivery nozzle 11 branches horizontally and the ejection nozzle 12 vertically. Both nozzles 11, 12 form an angle of 90 ° and go directly adjacent to one another from the funnel-shaped part 9.
  • the sorting device designed as an angle slide 13, 14 is attached at an angle formed by the opening cross sections.
  • the angle slider 13, 14 controls the opening of the delivery nozzle 11 with one leg 15 and the opening of the ejection nozzle 12 with the other leg 16.
  • the two legs 15, 16 are offset from one another in the sliding direction, so that when one leg 16 closes the ejection nozzle 12, the delivery nozzle 11 is open and vice versa, when the other leg 15 closes the delivery nozzle 11, the ejection nozzle 12 is open.
  • the legs 15, 16 are aligned with one another, but have mutually offset openings 17, 18, which alternately open the connecting pieces 11, 12.
  • the slider 13 or 14 is connected to the actuating mechanism 20 via the joint 19.
  • This can be a hydraulic or pneumatic cylinder or an electromagnet (solenoid), the actuator of which engages the angle slide.
  • the actuating mechanism 20 is actuated by the control unit 21, which can be a hydraulic, pneumatic or magnetic valve or a switch.
  • the control unit 21 has an electrical input which is connected to the evaluation unit 22 of the metal detector 23.
  • the metal detector 23 is an inductively acting device which has an opening which is penetrated by an alternating electromagnetic field. The metal detector 23 is plugged with this opening onto the non-metallic inlet connection 24 of the delivery line, so that the cross-section of this connection 24 is also penetrated by the alternating electromagnetic field.
  • the delivery nozzle 11 is connected to the delivery line 25.
  • the delivery line 25 is connected via the separator 36 to a suction device 37, e.g. a suction fan connected.
  • the separator 36 contains a filter 38 which allows air to pass through, but is impermeable to the material to be conveyed. The material to be conveyed falls out of the separator 36 into a collecting container 39.
  • the metal detector 23 sends a signal to the evaluation unit via its output, which converts the output signal of the metal detector into a switching signal with which the control unit 21, which switches on the actuating mechanism 20, is actuated.
  • the angle slide 13, 14 is brought from its initial position, in which it closes the ejection nozzle 12 with the leg 16 and releases the delivery nozzle with the opening 17, into the second end position, in which the leg 15 closes the delivery nozzle 11 and the ejection nozzle 12 opens.
  • the conveying flow is thus interrupted for a certain time, in which the conveyed material located in the swirl chamber 7 with the metal particles is excreted through the ejection nozzle 12.
  • the corresponding conduction or guidance of the conveyed material in the swirl chamber 7 results in a delay effect which, as a result, corresponds to a reduction in the conveying speed or the reaction time.
  • the metal detector 23 can namely be arranged closer to the sorting device (angle slide) than in the case of a straight conveyor line section. As can be seen from the figures, the metal detector 23 is located directly on the swirl chamber 7.
  • the swirl chamber 7, nozzle 24 and metal detector 23 can form a structural unit.
  • the inlet connection 24 is located on the upper edge of the cylindrical part 8 of the swirl chamber 7. A free swirl flow or turbulence flow can build up between the connection 24 and the connection 11.
  • the delivery line 25 Connected to the delivery nozzle 11 is the delivery line 25, on which a further metal detector 26 corresponding to the metal detector 23 is attached, which via the evaluation unit 27 and the control unit 28 actuates a false air valve 29 installed in the delivery line 25 at a distance from the metal detector 26. If, contrary to expectations, a metal particle enters the delivery line 25 through the delivery nozzle 11, this metal particle generates a signal in the metal detector 26 with which the false air valve 29 is opened. The promotion is interrupted on the section between the delivery nozzle 11 and the false air valve 29. In this case, the line section can be emptied, for example, through the ejection connector 12. In addition, a maintenance flap, not shown, can be installed in the delivery line 25. For these special maintenance tasks, the cross section of the ejection connector 12 is larger than the cross section of the delivery connector 11 and is, for example, rectangular, as can be seen from FIG. The corresponding opening 18 in the angle slide 14 is also rectangular.
  • a swirl flow is achieved by arranging the inlet connection piece 24 tangentially.
  • a helical vortex is formed in the material to be conveyed with a core largely free of material to be conveyed in the interior of the vortex chamber 7.
  • baffle or guide surfaces 33, 34 are provided, on which the material to be conveyed is deflected or swirled.
  • the inlet connection 24 can be aligned radially to the swirl chamber 7.
  • the material to be conveyed is flung vertically upward against the cover 10 serving as a baffle surface by the inlet nozzle 24, as a result of which strong turbulence is generated.
  • the cover 10 serving as a baffle surface by the inlet nozzle 24, as a result of which strong turbulence is generated.
  • the flow is interrupted when the delivery nozzle is closed by the slide 13, 14, that is, when the separation process is taking place.
  • the swirl chamber 7 is emptied, the material to be conveyed remains in the delivery line in front of the swirl chamber.
  • the vacuum must be re-established in the feed line in front of the swirl chamber before the feed can start again. This can lead to the line becoming blocked.
  • a suction port 36 can be connected to the ejection port 12, with which the vacuum in the delivery line in front of the device is maintained by means of a corresponding suction device, whereby the delivery up to the swirl chamber 7 is maintained even during the separation process .
  • the suction port 36 can be connected directly to the delivery line 25.
  • a sieve 37 is attached in front of the suction nozzle 36.
  • the sorting device has a flap 40 which can be pivoted about the axis 41 between a first position, which is shown in solid lines in the drawing, and a second position, which is shown in broken lines.
  • the funnel-shaped part 9 is followed by a Y-shaped pipe branch 42, from the inlet region 43 of which the ejection nozzle 12 extends in a straight line, while the delivery nozzle 11 branches off at an angle, for example at an angle of approximately 30 ° .
  • the axis 41 is mounted, on which the plate 40 is fixed tangentially with screws 44.
  • the flap 40 closes the ejection nozzle 12, whereby it runs parallel to the walls or to the axis of the delivery nozzle 11.
  • the outer end edge 45 of the flap 40 lies against the rectilinearly continuous wall of the inlet area 43 or ejection nozzle 12, so that the flap 40 lies obliquely in front of the ejection nozzle 12.
  • the end of the flap 40 facing away from the end edge 45 is fastened to the axis 41.
  • One end of the axis 41 is fixed to a lever arm 46.
  • the piston rod 47 of the actuating mechanism 20, which is designed as a piston-cylinder unit engages. If the piston rod 27 is retracted, then the lever 46 is pivoted clockwise according to FIG. 7 around the axis 41, whereby the axis 41 is rotated and the flap 40 reaches the second position shown in broken lines, in which it closes the delivery nozzle 11 and releases the ejection nozzle 12.
  • the outer end region of the flap 40 lies against a seal 49 which is fastened to the wall of the delivery nozzle 11. In the second position of the flap 40, this flap lies essentially parallel to the walls or the axis of the ejection connector 12.
  • Deflectors 50, 51 are arranged on the opposite walls of the inlet area 43, which protrude beyond the end edge 45 in the first and the second position of the flap 40, in order to prevent the granulate from being dammed up by the end edge 45.
  • All pipes of the branch 42 have a rectangular cross section, so that the flap 40 is also rectangular.
  • the length of the flap 40 is greater than the width of the nozzle 11 and 12, which have the same cross sections.
  • other pipe cross sections can also be used. In the case of circular tubes, the flap 40 would have an elliptical shape.

Claims (13)

1. Dispositif pour extraire, par triage, des particules métalliques dans un flux de produit transporté, par exemple un flux de produit moulu ou de granulat, comportant:
un détecteur de métaux (23) monté dans la conduite de transport (24, 25) et détectant, sans contact, les particules métalliques dans le flux de produit transporté,
un dispositif d'extraction par triage qui est disposé derrière le détecteur de métaux dans la direction du transport, qui peut commuter entre deux positions d'extrémité et qui, dans la première position d'extrémité, ouvre une tubulure de transport (11) et, dans l'autre position d'extrémité, ouvre une tubulure de rebut (12) du dispositif,
ainsi qu'un mécanisme de manoeuvre (20) piloté par le détecteur de métaux (23), pour commander le dispositif d'extraction par triage en fonction des signaux du détecteur de métaux de façon telle que, lorsque le détecteur de métaux reconnaît une particule métallique, le flux du produit transporté est temporairement dirigé par la tubulure de rebut (12) et qu'ensuite le flux du produit transporté est à nouveau envoyé dans la tubulure de transport (11) lorsque la particule métallique est séparée,
étant précisé qu'un mécanisme de ralentissement est prévu sur le flux de produit transporté, entre le détecteur de métaux (23) et le dispositif d'extraction par triage,

caractérisé en ce que le mécanisme de ralentissement est constitué d'une chambre à turbulence (7) de structure cyclonique dans laquelle est crée un écoulement en hélice ou écoulement turbulent, allongeant le temps de transport du produit transporté.
2. Dispositif selon la revendication 1, caractérisé en ce que l'écoulement en hélice ou écoulement turbulent du produit transporté est capté dans une partie en forme d'entonnoir (9) de la chambre à turbulence (7) et envoyé dans la tubulure de transport (11) disposée transversalement, de préférence sous un angle de 90°, par rapport à l'axe longitudinal de la chambre à turbulence (7).
3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que la tubulure de rebut (12) est reliée à l'extrémité en forme d'entonnoir (9) dans la direction de l'axe longitudinal de la chambre à turbulence (7).
4. Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que la tubulure de rebut (12) et la tubulure de transport (11) s'étendent, perpendiculairement l'une à l'autre, depuis la partie en forme d'entonnoir (9).
5. Dispositif selon l'une des revendications 1 à 4, caractérisé en ce que le dispositif d'extraction par triage est conçu sous forme d'un tiroir angulaire (13, 14) qui comporte deux ailes (15, 16) formant un angle et qui ferme soit la tubulure de rebut (12) soit la tubulure de transport (11), étant précisé que la première aile (15) correspond à l'ouverture de la tubulure de rebut (12) et l'autre aile (16) à l'ouverture de la tubulure de transport (11).
6. Dispositif selon la revendication 5, caractérisé en ce que chaque aile (15, 16) présente une ouverture de passage (17, 18) qui sont disposées décalées l'une de l'autre dans la direction du déplacement du tiroir angulaire (14).
7. Dispositif selon l'une des revendications 1 à 4, caractérisé en ce que le dispositif d'extraction par triage présente un clapet (40) qui peut pivoter autour d'un axe (41), qui, dans une première position, ferme la tubulure de rebut (12) et libère la tubulure de transport (11) et, dans une seconde position, libère la tubulure de rebut (12) et ferme la tubulure de transport (11); en ce que la tubulure de transport (11) s'étend obliquement depuis la zone d'entrée (43) du dispositif de triage tandis que la tubulure de rebut (12) se raccorde en ligne droite à la zone d'entrée (43); et en ce que le clapet (40), dans la première position, est orienté sensiblement parallèlement à la tubulure de transport (11) et, dans la seconde position, orienté sensiblement parallèlement à la tubulure de rebut.
8. Dispositif selon la revendication 7, caractérisé en ce que dans la zone d'entrée (43), en amont des emplacements où se trouve l'arête d'extrémité (45) du clapet (40) dans la première et dans la seconde positions, sont disposés, contre les parois de la zone d'entrée (43), des déflecteurs (50, 51) qui débordent au-delà de l'arête d'extrémité.
9. Dispositif selon l'une des revendications 1 à 8, caractérisé en ce que la tubulure de rebut (12) présente une section supérieure à celle de la tubulure de transport (11).
10. Dispositif selon l'une des revendications 1 à 9, caractérisé en ce que l'écoulement en hélice ou l'écoulement turbulent est crée par des éléments de rebond ou de guidage (33, 34, 35) installés dans la chambre à turbulence (7).
11. Dispositif selon l'une des revendications 1 à 10, caractérisé en ce qu'un second détecteur de métaux (26), installé sur la conduite de transport, détecte si le flux de produit transporté contient des particules métalliques en aval de la chambre à turbulence (7) dans la direction du transport, détecteur qui, lorsqu'il reconnaît une particule métallique non séparée par la tubulure de rebut (12), manoeuvre une vanne d'alimentation d'air (29) installée sur la conduite de transport (25), en aval du second détecteur de métaux (26) dans la direction du transport.
12. Dispositif selon l'une des revendications 1 à 11, caractérisé en ce qu'un dispositif d'aspiration (37) est relié à la tubulure de rebut (12) par l'intermédiaire d'un tube d'aspiration (36).
13. Dispositif selon la revendication 12, caractérisé en ce que la tubulure d'aspiration (36) est reliée à une partie (25) de la conduite de transport (25) elle-même reliée au dispositif d'aspiration (37).
EP86112134A 1985-09-19 1986-09-02 Dispositif de triage de particules métalliques Expired EP0218882B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853533390 DE3533390A1 (de) 1985-09-19 1985-09-19 Vorrichtung zum aussortieren von metallteilchen
DE3533390 1985-09-19

Publications (3)

Publication Number Publication Date
EP0218882A2 EP0218882A2 (fr) 1987-04-22
EP0218882A3 EP0218882A3 (en) 1988-02-03
EP0218882B1 true EP0218882B1 (fr) 1989-11-29

Family

ID=6281358

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86112134A Expired EP0218882B1 (fr) 1985-09-19 1986-09-02 Dispositif de triage de particules métalliques

Country Status (5)

Country Link
US (1) US4763792A (fr)
EP (1) EP0218882B1 (fr)
JP (1) JPH0764426B2 (fr)
AR (1) AR241239A1 (fr)
DE (2) DE3533390A1 (fr)

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DE4129882C2 (de) * 1990-09-17 2002-02-07 Truetzschler Gmbh & Co Kg Vorrichtung zum Abscheiden metallischer Verunreinigungen aus einer Fasertransportstrecke in der Spinnereivorbereitung
DE4131188C2 (de) * 1991-09-19 2002-08-14 Truetzschler Gmbh & Co Kg Vorrichtung an einer Förderleitung zum pneumatischen Fördern von Textilfasern, insbes. in der Spinnereivorbereitung
US5263651A (en) * 1992-04-01 1993-11-23 Beloit Technologies, Inc. Safety device for chip conditioning device
DE19820914B4 (de) * 1998-05-09 2010-01-07 TRüTZSCHLER GMBH & CO. KG Vorrichtung zum Leiten von in Luft schwebend geförderten textilen Faserflocken, z. B. Baumwolle, Chemiefasern, bei Spinnereivorbereitungsmaschinen
US6113482A (en) * 1999-06-10 2000-09-05 Marlen Research Corporation Metal-detectable elastomeric material for piston seals and the like
US6659284B2 (en) * 2002-03-04 2003-12-09 Mccray H. Glenn Mcminer material transfer process
DE102007015733B4 (de) * 2006-04-03 2014-10-23 Mesutronic Gerätebau GmbH Rohrweiche für Fallgut
DE102017118169A1 (de) * 2017-08-09 2019-02-14 Minebea Intec Aachen GmbH & Co. KG Vorrichtung zur Ausscheidung von Verunreinigungen aus einem Schüttgut
CN108380520B (zh) * 2018-05-15 2019-09-27 湖南农业大学 一种基于重金属含量自动分析摄影仪的粮食分拣装置及方法

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DE3323162A1 (de) * 1983-06-28 1985-01-03 Motan Gmbh, 7972 Isny Foerdereinrichtung
EP0143231A3 (fr) * 1983-11-26 1988-02-03 Pulsotronic Merten GmbH & Co. KG Dispositif de séparation de particules métalliques

Also Published As

Publication number Publication date
EP0218882A2 (fr) 1987-04-22
DE3667148D1 (de) 1990-01-04
US4763792A (en) 1988-08-16
DE3533390A1 (de) 1987-03-19
JPS6274831A (ja) 1987-04-06
AR241239A1 (es) 1992-02-28
JPH0764426B2 (ja) 1995-07-12
EP0218882A3 (en) 1988-02-03

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