EP3913119A1 - Système de transport de sortie dans une préparation des fibres - Google Patents

Système de transport de sortie dans une préparation des fibres Download PDF

Info

Publication number
EP3913119A1
EP3913119A1 EP21173545.1A EP21173545A EP3913119A1 EP 3913119 A1 EP3913119 A1 EP 3913119A1 EP 21173545 A EP21173545 A EP 21173545A EP 3913119 A1 EP3913119 A1 EP 3913119A1
Authority
EP
European Patent Office
Prior art keywords
suction
volume flow
negative pressure
collecting line
transport system
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.)
Pending
Application number
EP21173545.1A
Other languages
German (de)
English (en)
Inventor
Petr Cevona
Tobias WOLFER
Reto LÜTHARD
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.)
RIETER AG
Original Assignee
Maschinenfabrik Rieter 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 Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP3913119A1 publication Critical patent/EP3913119A1/fr
Pending legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G9/00—Opening or cleaning fibres, e.g. scutching cotton
    • D01G9/12—Combinations of opening or cleaning machines
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H11/00—Arrangements for confining or removing dust, fly or the like
    • D01H11/005—Arrangements for confining or removing dust, fly or the like with blowing and/or suction devices
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G21/00—Combinations of machines, apparatus, or processes, e.g. for continuous processing
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G23/00—Feeding fibres to machines; Conveying fibres between machines
    • D01G23/08—Air draught or like pneumatic arrangements

Definitions

  • the invention relates to a method for regulating a volume flow or pressure distribution in a waste transport system in a fiber preparation with a sequence of cleaning machines.
  • a fiber preparation facility in a spinning mill supplied fibers or fiber flakes are prepared for use in a spinning machine.
  • the fibers to be prepared for spinning go through several processing stages.
  • the fibers are removed from fiber balls in the form of fiber flocks.
  • So-called bale openers are usually used for this.
  • These fiber flocks are brought out of the bale opener via a pneumatic flock conveyor and, for example, brought to a subsequent cleaning machine.
  • the fiber preparation has a sequence of cleaning machines through which the fibers or fiber flocks pass.
  • the sequence and design of the cleaning machines are matched to the fibers to be processed and are used for cleaning, mixing and dissolving the fiber flocks into individual fibers and making them parallel.
  • the arrangement of the individual cleaning machines in a fiber preparation can be designed differently, this depends, among other things, on the raw material to be processed and the product to be achieved.
  • the cleaning machines used are, for example, coarse cleaners, fine cleaners, foreign part separators, as well as cards or cards.
  • Other types of machines, such as accumulators or mixers, can also be equipped with cleaning modules, which are also part of the cleaning machines.
  • the fibers or fiber flocks are usually conveyed between the machines by a pneumatic transport system with the help of transport air.
  • the transport air In front of the cleaning machines, the transport air is discharged as far as necessary through a separate exhaust air system.
  • waste occurs in the cleaning machine itself, which includes the dirt particles, foreign parts, seed or stalk parts, dust particles or else separated from the fibers or fiber flakes in the cleaning process Short fibers or fiber knots, so-called nits.
  • a constant pressure in the transport air flow through the machine is important for proper operation.
  • the cards which dissolve the fiber flocks into individual fibers and shape them into a sliver, form the end of the fiber preparation. Following the cards, the fibers are passed on to the spinning mill in the form of slivers. In the spinning mill preparation, the slivers are processed by stretching, combing machines or flyers for use in the final spinning process.
  • the EP 1 841 908 A1 discloses a foreign part separator in which the waste is fed into a garbage bag. Further it is according to the revelation DE 103 47 006 A1 known to convey the waste away from the discharge point with a specially designed fan and to feed it to a central waste disposal.
  • the EP 0 494 181 A1 discloses a cleaning machine in which the waste is brought into a collecting channel. The collecting duct is then emptied mechanically or by means of a continuous flow of transport air.
  • the disadvantage of the known methods is that the proposed waste transport systems make cumbersome and complex mechanical handling of the waste that occurs or that the waste must be discharged by means of continuously high suction capacities.
  • the object of the invention is accordingly to create a method and a device which enables an automatic operation of a waste transport system and thereby a reduction and optimization of the energy consumption for waste transport can be achieved.
  • a novel method for regulating a volume flow or pressure distribution in a waste transport system in a fiber preparation with a sequence of cleaning machines is proposed, with a waste transport system being provided which comprises a pipeline network consisting of a collecting line and suction lines leading from the collecting line to the cleaning machines comprises, wherein the manifold is connected to a vacuum source.
  • the suction lines are each equipped with a volume flow adjustment element and an actual volume flow in the collecting line is measured with a volume flow measurement and a suction power of the vacuum source is regulated by a target / actual comparison of the volume flow.
  • measuring methods known from the prior art can be used, such as a venturi or an anemometer.
  • suction power is the power that a negative pressure source has to provide in order to generate a specific volume flow under a specific negative pressure.
  • the suction power with high negative pressure and low volume flow corresponds to the suction power with low negative pressure and high volume flow. If, for example, a fan is used as the negative pressure source, the suction power is equivalent to the electrical power which a drive of the fan requires in order to generate a specific volume flow under a specific negative pressure.
  • the delivery flow is decisive.
  • the waste particles to be removed are transported with the conveying air through the suction lines and the collecting line. It is important that the conveying speed does not fall below a certain level in order to prevent the particles from settling in the lines. On the other hand, in order not to increase the energy consumption unnecessarily for safety reasons, it should be avoided to provide a high conveying or suction power that is not required.
  • the suction lines are provided with a volume flow adjustment element, for example a diaphragm, a flap or a slide, the total volume flow made available is divided accordingly between the suction lines.
  • a control system can set a target volume flow.
  • the vacuum source is now regulated in accordance with an actual / target comparison in such a way that a volume flow that is as constant as possible is achieved in the collecting line.
  • the waste transport system has a negative pressure control for each of the cleaning machines and the suction power of the negative pressure source is regulated by interconnecting the negative pressure controls.
  • the negative pressure controls each include a pressure sensor, a control circuit and a throttle element, a setpoint value for a negative pressure being specified by the control circuit and the current negative pressure being regulated to the setpoint value by actuating the throttle element with the aid of the pressure sensor. If the negative pressure increases too much in a cleaning machine connected to the waste transport system, this is registered by the corresponding negative pressure regulation and the opening of the throttle element is reduced. Slides or flaps, for example, can be used as throttle elements. The individual values of the pressure monitoring are passed on to the vacuum source.
  • the vacuum source is formed by a fan, this can be regulated by looking at the negative pressures in the individual suction lines.
  • the negative pressure source can in this case be operated with a constant negative pressure if, for example, the negative pressure source is formed by a filter house.
  • the vacuum source which can be common to the entire spinning mill, is designed to ensure a constant vacuum. This variant also avoids unnecessarily high suction power and optimizes the energy consumption of the vacuum source accordingly.
  • At least one suction line is provided with a shut-off element, the suction power of the vacuum source being increased before or simultaneously with the opening of the shut-off element by an amount which corresponds to a suction power requirement after the shut-off element has been opened.
  • a shut-off device is that cleaning machines that are not in use can simply be removed from the machine The waste transport system can be decoupled and, as a result, an increase in the suction power is not caused due to possible leaks without actually having to be suctioned.
  • the suction power of the vacuum source is increased in accordance with the planned opening of the shut-off element. The increase in suction power is increased accordingly to the expected increase. In this way, larger fluctuations in the total volume flow of the waste transport system as well as a response from negative pressure monitors of the other cleaning machines can be avoided.
  • suction lines are each provided with a shut-off device and the shut-off devices of the individual suction lines are opened one after the other for a certain period of time.
  • This cyclical transport of the waste from the individual cleaning machines has the advantage that a maximum value of the necessary suction power can be kept small, since the waste from all or several cleaning machines does not have to be transported at the same time.
  • the cycle times for the suction as well as the pauses between the suction of the different cleaning machines are to be adapted according to the construction of the cleaning machines and their mode of operation and load.
  • a mixture of cyclical and continuous operation of individual cleaning machines can also be aimed for. For example, cleaning machines like the card are to be provided with a continuous waste transport.
  • suction power of the vacuum source does not fall below a minimum. This measure ensures that contamination of the waste transport system is avoided. Departure points can also be integrated into the waste transport system, which must have continuous operation, such as hand-held suction devices or continuous cleaning devices in cards.
  • the waste transport system comprising a negative pressure source and a pipeline network consisting of a collecting line connected to the negative pressure source and suction lines going out from the collecting line to the individual cleaning machines.
  • the suction lines are each equipped with a volume flow adjustment device.
  • a volume flow measurement is provided in the collecting line or, alternatively, each cleaning machine is provided with a vacuum control with a pressure sensor and a throttle element.
  • At least one suction line is advantageously provided with a shut-off device. This makes it possible to separate a cleaning machine that is not in operation from the waste transport system.
  • Slides or flaps, for example, can be used as shut-off devices. When using a shut-off device provided with a drive, a cyclical connection of individual cleaning machines to the waste transport system can be achieved for a certain time by opening and closing the shut-off device.
  • a false air opening is preferably provided in the collecting line. This enables the vacuum source to be controlled in such a way that a minimum volume flow is always conveyed, even if most cleaning machines are separated from the waste transport system. It is also advantageous if the false air opening is controlled by negative pressure. This means that when the negative pressure in the collecting line rises, the secondary air opening is widened and when the negative pressure drops, the secondary air opening is closed. With the help of this device, a sharp drop in the negative pressure can be absorbed by closing a shut-off device of a cleaning machine, so that the volume flow sucked in by the negative pressure source is sucked in from the false air opening, at least until the regulation of the negative pressure source has adapted to the new situation.
  • the vacuum source is advantageously a fan with a speed-controlled drive.
  • the vacuum source can be a filter house.
  • So-called filter houses are typically installed in spinning mills or spinning mill preparation. In such a filter house, for example, exhaust air lines and suction lines are from the merged throughout the spinning mill. The air brought in is cleaned in the filter house.
  • a filter house is under negative pressure to prevent contamination of the environment. This negative pressure is also used directly for suction in suction systems connected to the filter house.
  • the filter house is regulated under a certain negative pressure by a corresponding fan system and serves as a negative pressure source.
  • Figure 1 shows a schematic representation of a fiber preparation with a sequence of cleaning machines 2, 3 and 4 in a first embodiment.
  • the fibers or fiber flocks to be processed are fed into a coarse cleaner 2 via a fiber feed 1 (not shown in detail).
  • the fibers pass via a transport line 5 from the coarse cleaner 2 to the fine cleaner 3 and from there via a transport line 6 to a card 4.
  • a waste resulting from the processing of the fibers is carried away from the individual cleaning machines 2, 3 and 4 in a waste transport system.
  • the fiber preparation shown has a waste transport system with a vacuum source in common.
  • the vacuum source is formed by a fan 16.
  • the waste transport system comprises, starting from the fan 16, a collecting line 14 and suction lines 8, 10 and 12 going out from the collecting line 14, which are each connected to a cleaning machine 2, 3 or 4.
  • a coarse cleaner 2 with a suction line 8, a fine cleaner 3 with a suction line 10 and a card 4 with a suction line 12 are connected to the collecting line 14. Due to the vacuum source or the fan 16, the waste that occurs is sucked through the waste transport system and then transferred to a waste discharge 17.
  • Volume flow adjusting elements 9, 11 and 13 are provided in each of the individual suction lines 8, 10 and 12. These serve to distribute the total volume flow sucked in by the fan 16 to the individual cleaning machines 2, 3 and 4 as required.
  • a volume flow measurement 15 is attached in front of the fan 16 for measuring an actual volume flow. Due to the cleaning machines in use and their mode of operation as well as depending on the fiber material to be processed, a setpoint value 19 for the volume flow is made by manual input or a control. With the aid of a target / actual comparison 18, the fan 16 is regulated in such a way that the measured actual volume flow corresponds to the specified target volume flow.
  • Figure 2 shows a schematic representation of a fiber preparation with a sequence of cleaning machines 2, 3 and 4 in a second embodiment.
  • the arrangement of the cleaning machines 2, 3 and 4 as well as parts of the waste transport system are with the representations according to the Figure 1 identical.
  • Figure 2 shows one for the embodiment according to Figure 1 alternative solution for the waste transport system.
  • a vacuum monitor is provided in the respective suction line 8, 10 and 12.
  • the negative pressure monitoring consists of a pressure sensor 21, 24 and 27 and a throttle element 22, 25 and 28 as well as a negative pressure control 20, 23 and 26.
  • the example of the suction line 8 to the coarse cleaner 2 explains a function that is valid for all suction lines 8, 10 and 12 the vacuum monitoring.
  • the existing negative pressure in the suction line 8 is measured via the pressure sensor 21.
  • This measured value is passed on to the negative pressure regulator 20 and compared with a value established for the specific operation of the coarse cleaner. According to the comparison, the throttle element 22 is closed or adjusted to adjust the negative pressure in the suction line 8 ascended.
  • the suction lines 8, 10 and 12 open into the collecting line 14 which is connected to a filter house 33.
  • the filter house 33 which is used for the entire spinning mill, is controlled centrally.
  • the negative pressure regulators 20, 23 and 25 are connected to this filter house regulation, so that a needs-based regulation of the filter house 33 is possible.
  • FIG 3 shows a schematic representation of a fiber preparation with a sequence of cleaning machines 2, 3 and 4 in a third embodiment.
  • the arrangement of the cleaning machines 2, 3 and 4 is with the representations according to Figure 1 identical.
  • the waste transport system comprises a collecting line 14 which is connected to a fan 16 serving as a vacuum source.
  • a volume flow measurement 15 is provided in the collecting line 14 with which an actual volume flow upstream of the fan 16 is measured.
  • a target / actual comparison 18 as in Figure 1 the suction power of the fan 16 is described.
  • the suction lines 8, 10 and 12 branch off from the collecting line 14 to the individual cleaning machines.
  • the suction line 8 connects the collecting line 14 to the coarse cleaner 2 and the suction line 10 connects the collecting line 14 to the fine cleaner 3.
  • the volume setting element 9 or 10 prevents an excessively high volume flow through the suction line 8 or 10, which is therefore not adapted to the needs of the corresponding cleaning machine 2 or 3 Fine cleaner 2 or coarse cleaner 3 allows.
  • the position of the shut-off devices 31 and 32 is incorporated into the setpoint specification 19 of the fan control. In this way, too little or too great a suction power of the fan 16 can be avoided and an optimized operation is possible.
  • a false air opening 30 is provided in the collecting line 14.
  • the suction line 12 which connects the card 4 to the collecting line, is provided with a vacuum monitor as in FIG Figure 2 described provided. This is due to the fact that a card 4 typically requires constant suction of the waste and cannot be extracted cyclically. Due to the intended regulation of the volume flow in the collecting line, however, a mixture of cyclical and constant waste transport is possible in one waste transport system.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP21173545.1A 2020-05-22 2021-05-12 Système de transport de sortie dans une préparation des fibres Pending EP3913119A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CZ2020294A CZ2020294A3 (cs) 2020-05-22 2020-05-22 Způsob regulace průtoku nebo tlaku v zařízení na dopravu odpadu v přípravě vlákna a zařízení

Publications (1)

Publication Number Publication Date
EP3913119A1 true EP3913119A1 (fr) 2021-11-24

Family

ID=75795375

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21173545.1A Pending EP3913119A1 (fr) 2020-05-22 2021-05-12 Système de transport de sortie dans une préparation des fibres

Country Status (3)

Country Link
EP (1) EP3913119A1 (fr)
CN (1) CN113718380A (fr)
CZ (1) CZ2020294A3 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0402941A1 (fr) * 1989-06-16 1990-12-19 Maschinenfabrik Rieter Ag Réglage de l'air de transport
EP0475073A1 (fr) * 1990-08-20 1992-03-18 Maschinenfabrik Rieter Ag Ligne de nettoyage
EP0494181A1 (fr) 1989-09-27 1992-07-15 Hollingsworth Gmbh Procede et dispositif de demelage et de nettoyage de produits fibreux.
DE10347006A1 (de) 2003-10-07 2005-04-28 Hubert Hergeth Trichterabsaugung bei Fremdteilen
EP1841908A1 (fr) 2005-01-25 2007-10-10 Jossi Holding AG Procede et dispositif d'elimination des impuretes d'une matiere fibreuse, notamment de coton brut
EP3450597A1 (fr) * 2017-08-30 2019-03-06 Maschinenfabrik Rieter AG Dispositif de réglage d'un flux de flocons de fibres dans une machine de nettoyage
CH715422A1 (de) * 2018-10-02 2020-04-15 Rieter Ag Maschf Faservorbereitung mit einer Abfolge von Maschinen.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3617526A1 (de) * 1986-05-24 1987-11-26 Truetzschler & Co Verfahren und vorrichtung zum speisen einer anzahl von karden, krempeln o. dgl.
CH713861A1 (de) * 2017-06-08 2018-12-14 Rieter Ag Maschf Produktionssteuerung in einer Putzerei.
CH713862A1 (de) * 2017-06-08 2018-12-14 Rieter Ag Maschf Druckregelung in einer Flockenspeisung.

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0402941A1 (fr) * 1989-06-16 1990-12-19 Maschinenfabrik Rieter Ag Réglage de l'air de transport
EP0494181A1 (fr) 1989-09-27 1992-07-15 Hollingsworth Gmbh Procede et dispositif de demelage et de nettoyage de produits fibreux.
EP0475073A1 (fr) * 1990-08-20 1992-03-18 Maschinenfabrik Rieter Ag Ligne de nettoyage
DE10347006A1 (de) 2003-10-07 2005-04-28 Hubert Hergeth Trichterabsaugung bei Fremdteilen
EP1841908A1 (fr) 2005-01-25 2007-10-10 Jossi Holding AG Procede et dispositif d'elimination des impuretes d'une matiere fibreuse, notamment de coton brut
EP3450597A1 (fr) * 2017-08-30 2019-03-06 Maschinenfabrik Rieter AG Dispositif de réglage d'un flux de flocons de fibres dans une machine de nettoyage
CH715422A1 (de) * 2018-10-02 2020-04-15 Rieter Ag Maschf Faservorbereitung mit einer Abfolge von Maschinen.

Also Published As

Publication number Publication date
CN113718380A (zh) 2021-11-30
CZ308782B6 (cs) 2021-05-12
CZ2020294A3 (cs) 2021-05-12

Similar Documents

Publication Publication Date Title
EP2867392B1 (fr) Procédé et dispositif pour réguler l'alimentation en fibres d'une cardeuse
EP3230501B1 (fr) Procédé et dispositif pour alimenter une installation en fibres
DE3228672C2 (fr)
EP2028297B1 (fr) Procédé d'ouverture et de dosage de matière fibreuse
EP3546625B1 (fr) Dispositif d'alimentation pour une carde
EP3412804B1 (fr) Procede et dispositif de commande de production dans un battage
EP3412805B1 (fr) Réglage de pression dans une alimentation en flocons
EP0006970B1 (fr) Dispositif de séparation de débourrure de coton provenant d'une machine de nettoyage de coton conventionnelle en fibres réutilisables et déchets
CH668779A5 (de) Vorrichtung zum pneumatischen speisen einer anzahl von karden.
EP3184676B1 (fr) Installation de traitement de fibres ainsi que procédé d'ouverture et de mélange de matière fibreuse dans une installation de traitement de fibres
DE10214389A1 (de) Vorrichtung in der Spinnereivorbereitung zum Abscheiden der Transportluft beim Beschicken von Fasermaterial, z.B. Baumwolle o. dgl., zu einer Verarbeitungsmaschine
CH715422A1 (de) Faservorbereitung mit einer Abfolge von Maschinen.
EP3913119A1 (fr) Système de transport de sortie dans une préparation des fibres
CH714844A1 (de) Speisevorrichtung zu einer Karde.
DE102016117302A1 (de) Verfahren zum Betreiben einer Textilmaschine und Textilmaschine
DE2018744C3 (de) Vorrichtung zum Reinigen von Fasermaterial an einer Offenend-Spinnvorrichtung
CH623084A5 (fr)
EP3951033A1 (fr) Détection de sortie dans une installation de préparation de fibre
DE202020101190U1 (de) Vorrichtung zur Speisung von Karden
CH683347A5 (de) Steuerung bzw. Regelung einer Faserverarbeitungsanlage.
DE2045006A1 (de) Verfahren und Vorrichtung zum Ab nehmen der Fasern vom Kammzylinder einer Separiervorrichtung
EP0877104A1 (fr) Appareil pour le traitement d'un courant de matière fibreuse dans une installation pour la préparation de fibres
DE2363771A1 (de) Vorrichtung zum bestimmen der feinheit von textilen vorgespinsten
CH714101A1 (de) Vorrichtung zur Regelung eines Faserflockenstromes in einem Reiniger.
DE3712046C2 (de) Beschickungseinrichtung für Strangmaschinen der tabakverarbeitenden Industrie

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

B565 Issuance of search results under rule 164(2) epc

Effective date: 20211018

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20220414

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230519

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20230906

RAP3 Party data changed (applicant data changed or rights of an application transferred)

Owner name: RIETER AG