EP1841908B1 - Procede et dispositif d'elimination des impuretes d'une matiere fibreuse, notamment de coton brut - Google Patents

Procede et dispositif d'elimination des impuretes d'une matiere fibreuse, notamment de coton brut Download PDF

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Publication number
EP1841908B1
EP1841908B1 EP05816080A EP05816080A EP1841908B1 EP 1841908 B1 EP1841908 B1 EP 1841908B1 EP 05816080 A EP05816080 A EP 05816080A EP 05816080 A EP05816080 A EP 05816080A EP 1841908 B1 EP1841908 B1 EP 1841908B1
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EP
European Patent Office
Prior art keywords
flow
conduit
discharge conduit
removal
foreign substances
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.)
Not-in-force
Application number
EP05816080A
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German (de)
English (en)
Other versions
EP1841908A1 (fr
Inventor
Alexander Jürgens
Andreas Meyenhofer
Christian Anderegg
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.)
Jossi Holding AG
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Jossi Holding AG
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Publication date
Application filed by Jossi Holding AG filed Critical Jossi Holding AG
Publication of EP1841908A1 publication Critical patent/EP1841908A1/fr
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Publication of EP1841908B1 publication Critical patent/EP1841908B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G31/00—Warning or safety devices, e.g. automatic fault detectors, stop motions
    • D01G31/003—Detection and removal of impurities

Definitions

  • the invention relates to a method for separating foreign substances into fibrous material, in particular raw cotton according to the preamble of claim 1.
  • Such methods are used, for example, in the blow room to prepare the raw cotton for the spinning process. In doing so, as soon as possible after opening the cotton bales, foreign fibers such as e.g. Lines, jute, etc., but also plastic films and the like excreted. While previously the contaminated subset was diverted via a flap or diverter into a separation vessel, the excretion today takes place exclusively via a transverse to the fiber transport line compressed air pulse.
  • a problem with the known methods is that a large amount of air is blown into the separation tank by the compressed air pulse at the moment of excretion during a short period of time. There is the risk that the foreign matter already lying in the separation container can be swirled up as a result of the resulting violent turbulence and thus be able to get back into the fiber transport line.
  • Various efforts have already been made to solve the problem of backflow or reliable separation of foreign matter.
  • the conveyor for the transport of the fiber material is at least partially formed by the endless surface of a continuous conveying means, for example by a screen drum on which the fiber material can be stored and carried.
  • a continuous conveying means for example by a screen drum on which the fiber material can be stored and carried.
  • the flow conditions in the fiber transport line should not be affected as much as possible and the disposal of foreign substances should be made possible without much effort.
  • the method should allow a relatively simple way to adapt to the given pneumatic transport conditions in a spinning mill. This object is achieved according to the invention with a method having the features in claim 1.
  • the excreted foreign matter does not necessarily have to be excreted in a largely pressure-tight separation vessel.
  • the precipitation according to the invention in a discharge connected to the separation opening, in which a permanent air flow is maintained combines two advantages with one another. On the one hand, the disposal of foreign matter takes place permanently and without intermediate storage in a separation vessel and on the other hand, no return flow is caused by the Ausscheideimpuls. If the flow conditions are correctly set, the direct connection of the fiber transport line to the discharge does not result in an impermissible pressure drop in the fiber transport line.
  • the air flow in the discharge line is adjusted such that, when the separation device is inactive, there is always a small partial flow from the discharge line into the fiber transport line. This prevents, for example, that off The fiber transport line permanently dust and fine single fibers get into the discharge.
  • the air flow can be maintained in the discharge by suction of atmospheric air, wherein at least a partial flow prevails, which extends away from the discharge opening in the direction of the flow of the Ausscheideimpulses.
  • This flow is achieved by an impurity only under the influence of the Ausscheideimpulses, whereby even after completion of the Ausscheideimpulses a backflow is no longer possible.
  • the prevailing in the derivative continuous flow can run relative to the flow of Ausscheideimpulses in different directions.
  • the elimination can be carried out based on the width of the fiber transport line or the separation opening by a compressed air pulse selectively only in that section in which the sensor system has detected a foreign substance. Even with simultaneous operation of multiple compressed air nozzles on different sections no turbulence, which cause a backflow of foreign substances.
  • the invention also relates to a device for separating foreign substances into fibrous material having the features of claim 6.
  • the foreign substances excreted by the device can thereby be disposed of, that the discharge is connected to a waste container or to a waste sack. This can be replaced from time to time.
  • the derivative could also be connected directly to a disposal device, which disposed of the foreign matter continuously.
  • the discharge is open to the atmosphere and that the foreign substances fall into an open container.
  • a fiber transport line 2 in which in loose form cotton fibers or cotton flakes be transported.
  • the device is integrated in a per se known manner in a cleaning line and arranged for example after a bale removing machine or after a first coarse cleaner.
  • the pneumatic transport are known in the art and not shown here.
  • the cotton fibers are passed from bottom to top with a tendency to vertical on the sensor system or on the separation device. However, this direction could be changed arbitrarily.
  • the fiber transport line (2) has a rectangular cross section, which is then converted again into a circular or any other cross section.
  • the sensor system consists in known manner of two cameras, such as CCD cameras 3, 3 ', whose optical axes are directed via deflecting mirrors 13, 13' from both sides to the fiber transport line.
  • the fiber transport line is transparent and there is illumination by means of luminaires 14 shown here only schematically.
  • the sensor system could also have sensors which have a foreign substance with other physical parameters can recognize, such as Ultrasonic sensors or sensors that respond to electromagnetic field changes.
  • a separating device designated overall by 4 is arranged on the fiber transport line 2. This has on one side a plurality of compressed air nozzles 5, which are selectively controllable, depending on in which section the sensor system has detected a foreign substance. Opposite the compressed air nozzles 5 is in the wall of the fiber transport line a separating opening 6 is arranged, through which a foreign substance can be excreted by means of a separating pulse b. This separation opening is connected via a connecting channel 10 with a transverse to the fiber transport line 2 extending discharge channel 7. Connecting channel and outlet channel form a total discharge for the excreted foreign matter.
  • the connecting channel 10 also has an approximately rectangular cross-section of the same width as the discharge opening 6.
  • the connecting channel leads tangentially into the discharge channel 7, which in particular FIG. 3 is apparent.
  • a curved baffle 15 causes a snail shell-like configuration in the area of the merge.
  • a suction slot 9 is also provided, the cross section of which can be changed by means of an adjustable flow aperture 19 and which extends over the entire channel width.
  • a sensor-controlled slide could also be provided which controls the inflow at the intake slot as a function of the pressure conditions.
  • the intake slot 9 causes a flow e against the discharge channel 7.
  • the intake slot could also be arranged relatively close to the discharge opening 6. It would also be conceivable to have an additional slot on the underside of the connection channel 10.
  • the approximately horizontally extending discharge channel 7 is connected at one end to the suction side of a fan 8 and from there to a waste bag 12. Alternatively, the discharge could also lead to a waste disposal facility.
  • the other end of the discharge channel 7 opens at the end face of the housing 17 in a suction port 11, the opening cross-section can be adjusted in a similar manner with a flow aperture.
  • viewing window 18 can be arranged be. The entire device rests on a rack 16 at a working height which facilitates installation and handling.
  • the flow conditions are adjusted by means of said flow orifices so that virtually equilibrium between the transport flow a in the fiber transport line 2 and the take-off flow d prevails in the discharge channel 7 in the region of entry of the connecting channel 10 in the discharge channel 7.
  • the flow is adjusted so that, starting from the intake slot 9, even a small return flow c in the direction of the discharge opening 6 prevails.
  • the compressed-air nozzle 5 is activated in the corresponding section, with an intensive excretion flow b being built up transversely to the transport flow a for a short time. This excretion flow tears a foreign substance 20 into the connection channel 10 (FIG. FIG.
  • the diameter of the discharge channel 7 could increase starting from the intake opening 11, so as to create equal pressure conditions over the entire width of the connecting channel or to compensate for a resulting pressure drop.
  • FIG. 4 runs the flow a in the pneumatic transport line 2 from top to bottom.
  • the connecting channel 10, starting from the separating opening 6, does not open into a transversely extending discharge channel, but slightly curved directly into the discharge channel 7, which then tapers in cross section again to a tube in which a delivery fan 8 is arranged.
  • Only a single suction opening in the form of a suction slot 9 is provided here. Its suction cross section could also be adjustable.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Claims (15)

  1. Procédé d'élimination des impuretés d'une matière fibreuse, notamment de coton brut, dans lequel on transporte la matière fibreuse dans une conduite de transport pneumatique de fibres (1) successivement devant un système de détection (3) et un dispositif d'élimination (4), et dans lequel, lorsque le système de détection reconnaît des impuretés, on les élimine hors de la conduite de transport de fibres à travers une ouverture d'élimination (6) pratiquée dans celle-ci, au moyen d'une impulsion d'air comprimé orientée transversalement à la conduite de transport de fibres, caractérisé en ce que l'on élimine les impuretés dans une conduite d'évacuation (7, 10) raccordée à l'ouverture d'élimination (6), dans lequel il existe une liaison directe entre la conduite de transport de fibres et la conduite d'évacuation, dans lequel on entretient dans la conduite d'évacuation un écoulement d'air permanent pour l'évacuation des impuretés.
  2. Procédé selon la revendication 1, caractérisé en ce que l'on règle l'écoulement d'air dans la conduite d'évacuation (7) de telle manière que, lorsque le dispositif d'élimination est inactif, il règne en permanence un faible écoulement partiel (c) de la conduite d'évacuation (7) dans la conduite de transport de fibres (2).
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que l'on entretient l'écoulement d'air dans la conduite d'évacuation par aspiration d'air atmosphérique, dans lequel il règne au moins un écoulement (e) qui part de l'ouverture d'élimination (6) dans la direction de l'impulsion d'élimination.
  4. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que l'on envoie l'écoulement de l'impulsion d'élimination à l'aide d'un élément de déviation (15) à peu près tangentiellement à un autre écoulement d'extraction orienté transversalement à cet écoulement.
  5. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que, par rapport à la largeur de la conduite de transport de fibres (2) ou de l'ouverture d'élimination (6), on effectue l'élimination au moyen d'une impulsion d'air comprimé de manière sélective uniquement dans la section dans laquelle le système de détection a reconnu une impureté.
  6. Dispositif d'élimination des impuretés d'une matière fibreuse, notamment de coton brut, avec une conduite de transport pneumatique de fibres (2) sur laquelle un système de détection (3) pour reconnaître des impuretés et un dispositif d'élimination (4) avec au moins une buse à air comprimé (5) agissant transversalement à la conduite de transport de fibres sont disposées successivement dans la direction de transport, dans lequel la conduite de transport de fibres présente une ouverture d'élimination (6) en face de la buse à air comprimé, caractérisé en ce que l'ouverture d'élimination (6) est raccordée à une conduite d'évacuation (7, 10), de telle manière qu'il existe une liaison directe entre la conduite de transport de fibres et la conduite d'évacuation, dans lequel un écoulement d'air permanent peut être entretenu dans la conduite d'évacuation pour l'évacuation des impuretés éliminées.
  7. Dispositif selon la revendication 6, caractérisé en ce que l'écoulement d'air dans la conduite d'évacuation peut être réglé à l'aide de moyens de réglage, de telle manière que, lorsque le dispositif d'élimination est inactif, un faible écoulement partiel (c) puisse être entretenu en permanence de la conduite d'évacuation (7) vers la conduite de transport de fibres (2).
  8. Dispositif selon la revendication 6 ou 7, caractérisé en ce que la conduite d'évacuation (7) est raccordée à un dispositif d'aspiration (8), dans lequel de l'air peut être aspiré au moins en partie de l'atmosphère par une ouverture d'aspiration, de préférence par une fente d'aspiration (9), de façon à pouvoir produire un écoulement (e) agissant à partir de l'ouverture d'élimination dans la direction de l'impulsion d'élimination.
  9. Dispositif selon l'une quelconque des revendications 6 à 8, caractérisé en ce que la conduite d'évacuation présente un canal de liaison (10) se raccordant à l'ouverture d'élimination (6) et un canal d'extraction (7) orienté transversalement à celui-ci.
  10. Dispositif selon la revendication 8 et la revendication 9, caractérisé en ce que le canal de liaison (10) entre de préférence tangentiellement dans le canal d'extraction (7) et en ce que l'ouverture d'aspiration (9) est disposée dans la région de l'entrée.
  11. Dispositif selon la revendication 9 ou 10, caractérisé en ce qu'il se trouve, dans la région de l'entrée du canal de liaison (10) dans le canal d'extraction (7), un élément de déviation (15) qui s'étend dans la direction longitudinale du canal d'extraction et qui envoie l'écoulement de l'impulsion d'élimination à peu près tangentiellement à un autre écoulement d'extraction dans le canal d'extraction, ou qui empêche un reflux dans le canal de liaison.
  12. Dispositif selon l'une quelconque des revendications 6 à 11, caractérisé en ce que la conduite d'évacuation (7, 10) est raccordée à un dispositif d'aspiration (8), dans lequel de l'air peut être aspiré de l'atmosphère de préférence par plusieurs ouvertures d'aspiration (9, 11), et en ce que les sections transversales des ouvertures d'aspiration sont réglables.
  13. Dispositif selon l'une quelconque des revendications 6 à 12, caractérisé en ce que plusieurs buses à air comprimé, pouvant être activées de manière sélective, sont disposées sur la conduite de transport de fibres (2).
  14. Dispositif selon l'une quelconque des revendications 6 à 13, caractérisé en ce que la conduite d'évacuation (7, 10) est raccordée à un réservoir de déchets ou à un sac de déchets (12).
  15. Dispositif selon l'une quelconque des revendications 6 à 13, caractérisé en ce que la conduite d'évacuation (7, 10) est raccordée à un dispositif d'élimination.
EP05816080A 2005-01-25 2005-11-04 Procede et dispositif d'elimination des impuretes d'une matiere fibreuse, notamment de coton brut Not-in-force EP1841908B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1152005 2005-01-25
PCT/EP2005/055746 WO2006079426A1 (fr) 2005-01-25 2005-11-04 Procede et dispositif d'elimination des impuretes d'une matiere fibreuse, notamment de coton brut

Publications (2)

Publication Number Publication Date
EP1841908A1 EP1841908A1 (fr) 2007-10-10
EP1841908B1 true EP1841908B1 (fr) 2010-08-11

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EP05816080A Not-in-force EP1841908B1 (fr) 2005-01-25 2005-11-04 Procede et dispositif d'elimination des impuretes d'une matiere fibreuse, notamment de coton brut

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Country Link
EP (1) EP1841908B1 (fr)
CN (1) CN101076625B (fr)
AT (1) ATE477357T1 (fr)
DE (1) DE502005010091D1 (fr)
WO (1) WO2006079426A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10347006B4 (de) * 2003-10-07 2020-10-15 Hubert Hergeth Trichterabsaugung bei Fremdteilen

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007005049A1 (de) 2007-01-26 2008-07-31 TRüTZSCHLER GMBH & CO. KG Vorrichtung in der Spinnereivorbereitung zum Abscheiden von Fremdstoffen an einer Fördereinrichtung für Fasermaterial, z.B. Baumwolle, Chemiefasern o. dgl.
DE102007005047A1 (de) 2007-01-26 2008-07-31 TRüTZSCHLER GMBH & CO. KG Vorrichtung in der Spinnereivorbereitung zum Abschneiden von Fremdstoffen an einer schnelllaufenden Walze zum Öffnen oder Abnehmen von Fasermaterial, z.B. Baumwolle, Chemiefasern o.dgl.
CN109791102A (zh) 2016-05-04 2019-05-21 乌斯特技术股份公司 监视在纤维绒流中的污染
WO2019173929A1 (fr) 2018-03-14 2019-09-19 Uster Technologies Ag Optimisation d'un procédé de filage par rapport à des substances étrangères
US12043926B2 (en) 2019-01-31 2024-07-23 Uster Technologies Ag Optimizing a spinning process with respect to foreign materials
CH716607A1 (de) 2019-09-17 2021-03-31 Uster Technologies Ag Verfahren und Vorrichtung zur Überwachung von Fremdmaterialien in einem Textilfasergebilde.
CZ2020294A3 (cs) 2020-05-22 2021-05-12 Rieter Cz S.R.O. Způsob regulace průtoku nebo tlaku v zařízení na dopravu odpadu v přípravě vlákna a zařízení
WO2022133616A1 (fr) 2020-12-22 2022-06-30 Uster Technologies Ag Dispositif et procédé d'isolement d'impuretés d'un courant de flux de fibres
CH719054A9 (de) 2021-10-12 2023-06-30 Uster Technologies Ag Optische Charakterisierung eines Textilfasergebildes.
CN114232141A (zh) * 2022-01-23 2022-03-25 陕西长岭纺织机电科技有限公司 一种用于异纤清除机的异纤剔除装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0879905A1 (fr) * 1997-05-20 1998-11-25 Jossi Holding AG Procédé et appareil pour détecter et éliminer des corps étrangers dans une matière fibreuse
DE59808078D1 (de) * 1998-09-07 2003-05-28 Jossi Holding Ag Islikon Verfahren und Vorrichtung zum Ausscheiden von Fremdstoffen in Fasermaterial, insbesondere in Rohbaumwolle
EP0987355A1 (fr) * 1998-09-14 2000-03-22 Jossi Holding AG Appareil et procédé pour détecter et éliminer des matériaux étrangers
DE10055953A1 (de) * 2000-11-11 2002-05-23 Hubert A Hergeth Luftausschleuseverfahren für Fremdteile

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10347006B4 (de) * 2003-10-07 2020-10-15 Hubert Hergeth Trichterabsaugung bei Fremdteilen

Also Published As

Publication number Publication date
DE502005010091D1 (de) 2010-09-23
CN101076625A (zh) 2007-11-21
EP1841908A1 (fr) 2007-10-10
CN101076625B (zh) 2011-06-29
ATE477357T1 (de) 2010-08-15
WO2006079426A1 (fr) 2006-08-03

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