EP1841908A1 - 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

Info

Publication number
EP1841908A1
EP1841908A1 EP05816080A EP05816080A EP1841908A1 EP 1841908 A1 EP1841908 A1 EP 1841908A1 EP 05816080 A EP05816080 A EP 05816080A EP 05816080 A EP05816080 A EP 05816080A EP 1841908 A1 EP1841908 A1 EP 1841908A1
Authority
EP
European Patent Office
Prior art keywords
discharge
flow
transport line
separation
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
EP05816080A
Other languages
German (de)
English (en)
Other versions
EP1841908B1 (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
Original Assignee
Jossi Holding AG
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 Jossi Holding AG filed Critical Jossi Holding AG
Publication of EP1841908A1 publication Critical patent/EP1841908A1/fr
Application granted granted Critical
Publication of EP1841908B1 publication Critical patent/EP1841908B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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. It will be at a very early stage after opening the cotton bales foreign fibers such. B. Cords, 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 overcome the problem of backflow or. to solve the reliable separation of foreign substances.
  • EP-A 989 214 is proposed to solve the problem, at least during the duration of the Ausscheideimpulses either increase the volume of the separation vessel or to suck air through an air outlet opening on the separation vessel.
  • a backflow of foreign substances in the fiber transport line can be largely prevented because the existing air in the separation vessel need not be displaced by the compressed air pulse. Due to the suction effect at the moment of excretion, however, an interfering movement of the foreign matter in the separation container takes place and they have to follow suit as before taken from time to time via locks the separation vessel.
  • 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 substances takes place permanently and without intermediate storage in a separation vessel and on the other hand, no return flow is triggered by the separation pulse. 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 runs 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 relative.
  • the prevailing in the derivative continuous flow can run relative to the flow of Ausscheideimpulses in different directions.
  • the precipitation can be based on the width of the fiber transport line or.
  • the ejection opening by a compressed air pulse selectively take place only in that section in which the sensor system has detected an impurity. 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 be disposed of that the discharge is connected to a waste container or 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.
  • FIG. 1 shows a greatly simplified perspective view of a separating device
  • FIG. 2 shows the device according to FIG. 1 in a perspective overall view
  • Figure 3 a cross section through the derivative in Figures 1 and 2, and
  • Figure 4 a schematic representation of another
  • a device designated as a whole by 1 has a fiber transport line 2 in which cotton fibers or fibers are loosely disposed. cotton flakes are transported.
  • the device is integrated in a per se known manner in a cleaning line and for example after a bale removal machine or. arranged after a first coarse cleaner.
  • the pneumatic transport are known in the art and not shown here.
  • the cotton fibers from bottom to top with a tendency to vertical on the sensor system or. passed by the separation device. This direction could, however, be changed as desired.
  • the precipitate has the fiber transport line (2) has a rectangular cross section, which is then converted back 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 B. 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.
  • a discharge opening 6 Opposite the compressed air nozzles 5 in the wall of the fiber transport arranged a discharge opening 6, through which a foreign substance by means of a Ausscheideimpulses b can be excreted.
  • 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 likewise has an approximately rectangular cross-section of the same width as the separating opening 6.
  • the connecting channel thereby leads tangentially into the withdrawal channel 7, which can be seen in particular from FIG.
  • 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 windows 18 can be orders be.
  • the entire device rests on a rack 16 at a working height which facilitates installation and handling.
  • the flow conditions using the flow restrictors are adjusted so that virtually equilibrium between the transport flow a in the fiber transport line 2 and the discharge 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 connecting channel 10 (FIG.
  • the diameter of the discharge channel 7 could increase, starting from the intake opening 11, in order to create equal pressure ratios over the entire width of the connecting channel. to compensate for a resulting pressure drop.
  • the flow a in the pneumatic transport line 2 runs from top to bottom.
  • the connecting channel 10, starting from the separating opening 6, does not open into a transverse thereto. channel, but goes 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
EP05816080A 2005-01-25 2005-11-04 Procede et dispositif d'elimination des impuretes d'une matiere fibreuse, notamment de coton brut Expired - Lifetime 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 true EP1841908A1 (fr) 2007-10-10
EP1841908B1 EP1841908B1 (fr) 2010-08-11

Family

ID=35787464

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05816080A Expired - Lifetime EP1841908B1 (fr) 2005-01-25 2005-11-04 Procede et dispositif d'elimination des impuretes d'une matiere fibreuse, notamment de coton brut

Country Status (5)

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
EP3913119A1 (fr) 2020-05-22 2021-11-24 Maschinenfabrik Rieter AG Système de transport de sortie dans une préparation des fibres

Families Citing this family (12)

* 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
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
EP3918119B1 (fr) 2019-01-31 2023-06-28 Uster Technologies AG Optimisation du procédé de filage en regard de corps étrangers
CH716607A1 (de) 2019-09-17 2021-03-31 Uster Technologies Ag Verfahren und Vorrichtung zur Überwachung von Fremdmaterialien in einem Textilfasergebilde.
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
CH721926A1 (de) 2024-06-24 2025-12-30 Uster Technologies Ag Kühlung einer elektrischen vorrichtung an einem förderkanal
CH722035A1 (de) 2024-08-12 2026-02-27 Uster Technologies Ag Mehrteiliges gehäuse für eine vorrichtung

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
EP0989214B1 (fr) * 1998-09-07 2003-04-23 Jossi Holding AG Procédé et appareil pour éliminer les corps étrangers de la matière fibreuse, en particulier du coton brut
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006079426A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3913119A1 (fr) 2020-05-22 2021-11-24 Maschinenfabrik Rieter AG Système de transport de sortie dans une préparation des fibres

Also Published As

Publication number Publication date
DE502005010091D1 (de) 2010-09-23
EP1841908B1 (fr) 2010-08-11
ATE477357T1 (de) 2010-08-15
WO2006079426A1 (fr) 2006-08-03
CN101076625A (zh) 2007-11-21
CN101076625B (zh) 2011-06-29

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