EP3450597B1 - Vorrichtung zur regelung eines faserflockenstromes in einem reiniger - Google Patents

Vorrichtung zur regelung eines faserflockenstromes in einem reiniger Download PDF

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Publication number
EP3450597B1
EP3450597B1 EP18189872.7A EP18189872A EP3450597B1 EP 3450597 B1 EP3450597 B1 EP 3450597B1 EP 18189872 A EP18189872 A EP 18189872A EP 3450597 B1 EP3450597 B1 EP 3450597B1
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EP
European Patent Office
Prior art keywords
cleaner
transport line
exhaust air
pressure
inlet connection
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.)
Active
Application number
EP18189872.7A
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English (en)
French (fr)
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EP3450597A1 (de
Inventor
Tobias WOLFER
Roman ANGEHRN
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.)
Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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Publication of EP3450597A1 publication Critical patent/EP3450597A1/de
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    • 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
    • D01G23/02—Hoppers; Delivery shoots
    • D01G23/04—Hoppers; Delivery shoots with means for controlling the feed
    • 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
    • D01G9/08—Opening or cleaning fibres, e.g. scutching cotton by means of air draught arrangements
    • 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
    • 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
    • D01G9/04—Opening or cleaning fibres, e.g. scutching cotton by means of beater arms

Definitions

  • the invention relates to a cleaner for a spinning preparation system with a device for regulating a fiber flock stream and a method for regulating the fiber flock stream in the cleaner in a spinning preparation system.
  • Fiber processing machines such as intermediate storage devices, mixers and carding machines are used in spinning preparation systems, which serve to clean, mix and separate the fiber material into individual fibers and also to align the fibers in parallel. These machines have in common the fact that they have a flock feed.
  • the fiber material to be processed is fed to the machines in the form of fiber flocks through a pneumatic conveyor.
  • Cleaners used in a spinning preparation system are operated here in continuous operation. In doing so, the fiber flocks are sent to an inlet of the cleaner in a uniform fiber flock stream and transported through the cleaner with the help of a rotating cleaner roller.
  • the fiber flock stream consisting of the fiber flocks to be cleaned, is guided to the cleaner by the necessary conveyor air with pneumatic conveyance around the fiber flocks. Conveyor air is transported together with fiber flocks through the cleaner. After leaving the cleaner through an outlet, the fiber flock stream is transported by means of a fan to the next machine downstream in the spinning preparation system, for example, a mixer.
  • regulators and controllers may be provided to ensure the most uniform possible volume flow of conveyor air and therefore the fiber flock stream.
  • CH 696 909 A5 discloses one such regulator.
  • secondary air openings may be provided at the start of pneumatic conveyance, namely at the outlet of the mixer in the present case, to ensure regulation of the downstream fan.
  • constant operating conditions must be ensured in order to achieve a high quality and uniform cleaning in the cleaner.
  • the operating conditions in the cleaner are influenced by the pneumatic feed and pneumatic discharge of the fiber flocks as well as the secondary air openings or exhaust air openings that are provided.
  • the mixture of fiber flocks and conveyor air to be processed is also not homogenous because the fiber flocks may come in different sizes. Volume flow and pressure conditions in the cleaner also play a role.
  • US 5 224 243 A discloses a cleaning line with false air infeed valve for regulating air flow therein, a pressure sensor or feeler is arranged in the duct or duct means where the actual pressure is measured.
  • a pressure sensor or feeler is arranged in the duct or duct means where the actual pressure is measured.
  • US 5 143 485 A discloses a method of operating a pneumatic transport system in a process line of a spinning mill.
  • the negative pressure in critical region of conveying duct can be measured by sensors and influenced by the relevant transport fans, adjustable flats, the leakage air openings and so on, which are controlled and adjusted by a computer according to the stored desired value, so that the pressure values in the critical regions are corrected and brought into the respectively predetermined desired ranges.
  • US 4 701 981 A discloses an installation for pneumatically feeding a plurality of carding machines arranged for simultaneous operation, the installation has a common transport conduit, which is connected to the carding machines, and a conveying fan contained for transporting the fiber flocks by air stream.
  • a control apparatus processes the data of the air pressure, the air quantites, the air speed and the number of the operating cards and adjust the rpm of the conveying fan and/or the cross-sectional area of the conveyor duct, so as to vary the flow rate of the fiber material in the common transport conduit as a function of at least one operational parameter of the installation.
  • One disadvantage of the known prior art is that the result to be achieved by cleaning the fiber flocks in the cleaner is determined not only by the volume flow of conveyor air and the rotational speed of the cleaner roller but also by the behavior of the fiber flocks inside the cleaner. For example, at a high volume flow, the fiber flocks are driven through the cleaner by the conveyor air, and the desired interaction with the cleaner roller fails to occur. The fiber flocks are compressed and therefore the cleaning effect is inferior due to an elevated pressure in the inlet of the cleaner.
  • the object of the invention is thus to create a device for regulating the fiber flock stream in the cleaner, which will permit uniform cleaning of the fiber flocks in the cleaner, regardless of the pneumatic feed and pneumatic discharge of the fiber flocks.
  • a novel device and a respective method for regulating a fiber flock stream in a cleaner in a spinning preparation system are proposed.
  • the fiber flock stream is guided through a transport line to an inlet into the cleaner and through an outlet out of the cleaner, after passing through a cleaning chamber, such that the cleaner has an inlet connection for connecting the transport line.
  • a static pressure measurement is provided in the fiber flock stream and in the transport line upstream from the inlet connection and the pressure measurement, and an exhaust air pipe connected to the transport line having a vent fan with a drive is provided in the inlet connection or in the transport line upstream from the inlet connection and the pressure measurement.
  • a target value for the pressure is assigned to a predetermined operating state or a current operating state of the cleaner. Control of the drive for the exhaust air van is provided for regulating the target value for the pressure in the cleaner.
  • the static pressure in the fiber flock stream is measured and regulated with the help of the exhaust air fan.
  • a static pressure measurement may be carried out in the inlet connection of the cleaner or in the transport line upstream from the inlet connection. Since the static pressure is measured and the flow-dependent dynamic pressure is disregarded, the pressure measurement may take place at a readily accessible location, independently of the flow conditions prevailing at that location inside the transport line or the inlet connection. Alternatively, the pressure measurement may also be provided in the cleaning chamber of the cleaner.
  • the cleaning chamber refers to the area of the cleaner, through which the fiber flock stream is guided between the inlet and the outlet.
  • the measured static pressure is conveyed as an actual value of the pressure to a controller.
  • the actual value is compared by the controller with the predetermined target value, and a control signal is output to the drive of the exhaust air fan according to the defined difference.
  • the exhaust air fan supports the separation of fiber flocks and transport air in the inlet region of the cleaner, which contributes toward maintaining a relationship that is ideal for the desired operation between the transport air and the quantity of fiber flocks contained in the transport air in the cleaner.
  • the connection of the exhaust air pipe to the transport line is provided upstream from the inlet connection into the cleaner and upstream from the pressure measurement, as seen in the direction of flow of the fiber flock stream.
  • the tie-in of the exhaust air pipe to the transport line is equipped with a corresponding system for retaining the fiber flocks in the transport line. Gratings, screens, filter cloths or other devices known from the prior art may be used there.
  • a drop in pressure caused by an additional control of the volume stream of conveyor air in the transport system thus has no influence on a pressure zero point or the volume flow in the cleaner.
  • a pressure zero point is established between two fans. This pressure zero point migrates // travels as a function of the operating points of the fans between these fans and the transport path when there is no regulation of the pressure. In the cleaner the same conditions always prevail due to the pressure regulation and any shift in the pressure zero point into the cleaner is suppressed. Influences of a filter house which is usually tied into the exhaust air and transport system can also be compensated. Therefore the inefficient open transfers which are mounted behind each machine in the prior art are omitted in a cleaner. A controlled pressure difference between the inlet and outlet of the cleaner is ensured.
  • the static pressure measurement is advantageously arranged in the inlet connection of the cleaner, which therefore yields stable conditions.
  • Suitable pressure measurements are known from the prior art such as spring pressure pickups, piezoresistive or piezoelectric pressure sensors or both capacitive and inductive pressure sensors. Due to the arrangement of the pressure pickup in the inlet connection of the cleaner, the influences from transport of the fiber flocks in the transport line or in the cleaner are minimized.
  • the prevailing operating state can be determined by the controller from the fiber flock stream. This function can be taken over from measurement results in the upstream components of the spinning preparation system, such as the bale opener or the transport line, for example. It is also conceivable for a measurement to be performed on the conveyor air steam or the quantities of fiber flocks in the transport air stream. Based on these parameters, the cleaner is adjusted (rotational speed, grating alignment, etc.) and the desired cleaning of the fiber flocks is achieved at a certain pressure. However, the reverse path is also conceivable, so that the cleaner is adjusted manually to a certain production and the operating state results from this and is used to determine the target value for the pressure.
  • the operating state that is predetermined and therefore the target value for the pressure can be set manually on the controller. Therefore, empirical values can be input or an operation can be carried out at an altered pressure without changing other parameters.
  • the exhaust air fan is preferably connected to an exhaust air system of the spinning preparation system.
  • Spinning mills are usually equipped with a central exhaust air system, which filters the exhaust air before discharging it to the outside or feeding it back into the system.
  • a method for regulating a fiber flock stream in a cleaner in a spinning preparation system is also proposed, wherein the fiber flock stream is conveyed through a transport line to an inlet into the cleaner, and after passing through a cleaning chamber, is discharged from the cleaner through an outlet, wherein the cleaner has an inlet connection for connection of the transport line.
  • a static pressure is measured in the fiber flock stream in the inlet connection or in the transport line upstream from the inlet connection or in the cleaning chamber.
  • An exhaust air pipe connected to the transport line with an exhaust air fan having a drive is provided in the transport line upstream from the inlet connection and upstream from the pressure measurement.
  • a target value for the pressure in the cleaner is determined, predetermined or prevailing operating state of the cleaner.
  • the pressure in the cleaner is regulated at the target value determined previously.
  • the fiber flock stream is advantageously conveyed at a constant conveyor air flow rate through the inlet to the cleaner. Maintaining a constant conveyor air flow rate necessitates a measurement of the conveyor air stream and regulation of the fan in the transport line to the cleaner.
  • FIG. 1 shows a simplified schematic diagram of a spinning preparation system.
  • the sequence of machines in a spinning preparation system as described below and as illustrated in Figure 1 is given as an example and can also be implemented in other arrangements or with the other machines added.
  • the fibers supplied in the form of fiber bales 1 to a spinning mill are broken up into fiber flocks using a bale opener 2.
  • the fiber flocks removed from the fiber bales 1 using the bale opener 2 are transported as a fiber flock stream by means of transport fan 3 to a cleaner 5 with the help of transport air or conveyor air in a transport line 4.
  • the fiber flock stream passes through the cleaner 5, wherein the fiber flocks are freed of contaminants.
  • the fiber flocks are supplied from the cleaner 5 to a mixer 8 via a transport line 6 and with the help of an additional transport fan 7.
  • the fiber flocks that have been introduced are mixed in the mixer 8 to obtain the most homogenous possible distribution of the various fiber components.
  • the fiber flocks are taken from the mixer 8 and sent with the help of another transport fan 10 to a distributor 11 through a transport line 9.
  • the fiber flocks then go from the distributor 11 to the carding machines 12, where the fiber flocks are broken up into individual fibers and the fibers are arranged in parallel, cleaned and supplied in the form of slivers for further processing.
  • FIG. 2 shows a schematic diagram of one embodiment of the device.
  • the fiber flock stream 24 is sent through transport line 4 to an inlet connection 17 of the cleaner 5.
  • the cleaner 5 comprises a cleaner roller 13 which rotates in the direction 15 and is fitted with beater elements 14 on its circumference.
  • the fiber flocks guided into the inlet connection 17 are passed, first, around the cleaner roller 13 by the entrained conveyor air and, second, by the rotating cleaner roller 13 and/or the beater elements 14. In doing so, the fiber flocks are conveyed over a grating 16, which removes the contaminants from the fiber flocks.
  • the fiber flock stream 24 entering the cleaner 5 through the inlet connection 17 is passed several times around the cleaner roller 13 by means of baffles mounted in a spiral pattern accordingly above the cleaner roller 13 and then conveyed to an outlet 18.
  • the space through which the fiber flocks are guided in a spiral pattern can be referred to as the cleaning chamber 30.
  • the cleaned fiber flocks leave the cleaner 5 as a fiber flock stream 25, passing through the outlet 18 into an additional
  • a static pressure measurement 23 is mounted in the inlet connection 17.
  • the static pressure is sent as an actual value 27 to a controller 26, based on the pressure measurement 23.
  • an exhaust air pipe 19 is connected to the transport line 4, with the air being guided by an exhaust air fan 20.
  • the fan 20 is provided with a drive 21 for regulating the rotational speed of the exhaust air fan 20.
  • the exhaust air pipe 19 carries the air withdrawn from the transport line 4 through the exhaust air fan 20 to an exhaust air 22 system (not shown) of a spinning preparation system.
  • a control signal 29 in controller 26 is output to the drive 21 of the exhaust air fan 20 based on the difference between the actual value 27 of the pressure and the predetermined target value 28 for the pressure.
  • the setpoint for the target value 28 can be received by the controller 26 via a measurement system upstream from the cleaner 5, or the target value may be input into the controller 26 by manual entry.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Claims (8)

  1. Vorrichtung zur Regelung eines Faserflockenstromes (24, 25) in einem Reiniger (5) in einer Spinnereivorbereitung, die Vorrichtung weist einen Reiniger (5) und eine Transportleitung (4) auf, der Reiniger (5) weist eine Reinigungskammer (30), einen Einlaufstutzen (17) zum Anschluss der Transportleitung (4) und einen Auslauf (18) auf, wobei der Faserflockenstrom (24, 25) durch eine Transportleitung (4) zum Einlauf in den Reiniger (5) und nach Durchlaufen der Reinigungskammer (30) über einen Auslauf (18) aus dem Reiniger (5) geführt ist, wobei im Einlaufstutzen (17) oder in der Transportleitung (4) vor dem Einlaufstutzen (17) oder in der Reinigungskammer (30) eine statische Druckmessung (23) im Faserflockenstrom (24) vorgesehen ist, dadurch gekennzeichnet, dass die Vorrichtung in der Transportleitung (4) vor dem Einlaufstutzen (17) und vor der Druckmessung (23) ein mit der Transportleitung (4) verbundenes Abluftrohr (19) aufweist, und dass ein Abluftventilator (20) mit einem Antrieb (21) im Abluftrohr (19) vorgesehen ist, und dass eine Steuerung des Antriebs (21) des Abluftventilators (20) zur Regelung eines Sollwertes für den Druck im Reiniger (5) vorgesehen ist, wobei einem vorgegebenen oder aktuellen Betriebszustand des Reinigers (5) ein Sollwert für den Druck zugeordnet ist.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die statische Druckmessung (23) im Einlaufstutzen (17) des Reinigers (5) angeordnet ist.
  3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Abluftventilator (20) an ein Abluftsystem der Spinnereivorbereitung anschliessbar ist.
  4. Verfahren zur Regelung eines Faserflockenstromes (24, 25) in einem Reiniger (5) in einer Spinnereivorbereitung, wobei der Faserflockenstrom (24, 25) über eine Transportleitung (4) zu einem Einlauf in den Reiniger (5) gefördert und über einen Auslauf (18) aus dem Reiniger (5) abgeführt wird, wobei der Reiniger (5) einen Einlaufstutzen (17) zum Anschluss der Transportleitung (4) aufweist, wobei im Einlaufstutzen (17) oder in der Transportleitung (4) vor dem Einlaufstutzen (17) oder in einer Reinigungskammer (30) ein statischer Druck im Faserflockenstrom (24) gemessen wird und in der Transportleitung (4) vor dem Einlaufstutzen (17) und vor der Druckmessung (23) ein mit der Transportleitung (4) verbundenes Abluftrohr (19) mit einem Abluftventilator (20) mit einem Antrieb (21) vorgesehen sind und aus einem vorgegebenen oder aktuellen Betriebszustand des Reinigers (5) ein Sollwert für den Druck im Reiniger (5) bestimmt und durch eine Steuerung des Antriebs (21) des Abluftventilators (20) der Druck im Reiniger (5) auf den Sollwert geregelt wird.
  5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass der Faserflockenstrom (24) mit einer konstanten Förderluftmenge über den Einlaufstutzen (17) in den Reiniger (5) geführt wird.
  6. Vorrichtung nach Anspruch 4 oder 5, dadurch gekennzeichnet, dass der aktuelle Betriebszustand durch die Steuerung aus dem Faserflockenstrom (24) ermittelbar ist.
  7. Vorrichtung nach mindestens einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, dass der vorgegebene Betriebszustand manuell an der Steuerung festlegbar ist.
  8. Vorrichtung nach mindestens einem der Ansprüche 4 bis 7, dadurch gekennzeichnet, dass der statische Druck im Reiniger (5) konstant ist.
EP18189872.7A 2017-08-30 2018-08-21 Vorrichtung zur regelung eines faserflockenstromes in einem reiniger Active EP3450597B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH01073/17A CH714101A1 (de) 2017-08-30 2017-08-30 Vorrichtung zur Regelung eines Faserflockenstromes in einem Reiniger.

Publications (2)

Publication Number Publication Date
EP3450597A1 EP3450597A1 (de) 2019-03-06
EP3450597B1 true EP3450597B1 (de) 2021-10-06

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EP18189872.7A Active EP3450597B1 (de) 2017-08-30 2018-08-21 Vorrichtung zur regelung eines faserflockenstromes in einem reiniger

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EP (1) EP3450597B1 (de)
CN (1) CN109423714B (de)
CH (1) CH714101A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ308782B6 (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

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3442942A1 (de) * 1984-11-24 1986-05-28 Trützschler GmbH & Co KG, 4050 Mönchengladbach Vorrichtung zum pneumatischen speisen einer anzahl von karden
DE3617526A1 (de) * 1986-05-24 1987-11-26 Truetzschler & Co Verfahren und vorrichtung zum speisen einer anzahl von karden, krempeln o. dgl.
US5143485A (en) * 1989-06-16 1992-09-01 Maschinenfabrik Rieter Ag Transport air control
DE3940524A1 (de) * 1989-12-07 1991-06-13 Rieter Ag Maschf Transportluftregelung
DE4026330A1 (de) * 1990-08-20 1992-02-27 Rieter Ag Maschf Putzereilinie
DE9017760U1 (de) * 1990-09-17 1991-12-05 Trützschler GmbH & Co KG, 4050 Mönchengladbach Vorrichtung zum Abscheiden von Fremdkörpern, insbesondere Schwerteilen wie Metall-, Holz-, Pappteilen, Steinen u.dgl., aus Baumwollfaserflocken in der Spinnereivorbereitung
EP0548023A1 (de) * 1991-12-17 1993-06-23 Maschinenfabrik Rieter Ag Durchfluszsteuerung einer Putzereilinie
DE19906148A1 (de) * 1999-02-13 2000-08-17 Truetzschler Gmbh & Co Kg Vorrichtung zum Füllen eines Flockenspeichers, insbesondere einer Karde, Krempel, Reinigers o. dgl. mit Faserflocken
DE10305049B4 (de) * 2003-02-07 2018-08-02 Trützschler GmbH & Co Kommanditgesellschaft Vorrichtung zum pneumatischen Speisen mindestens einer Spinnereivorbereitungsmaschine, z.B. Karde, Reiniger
WO2006047897A1 (de) * 2004-11-04 2006-05-11 Maschinenfabrik Rieter Ag Reinigungsvorrichtung für faserflocken
CH704918A2 (de) * 2011-05-13 2012-11-15 Rieter Ag Maschf Vorrichtung in der Spinnereivorbereitung zur Ausscheidung von Transportluft aus einem Transportluftstrom.
DE102015106415A1 (de) * 2014-12-13 2016-06-16 Trützschler GmbH + Co KG Textilmaschinenfabrik Verfahren und Vorrichtung zum Beschicken einer Anlage mit Fasern

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Publication number Publication date
EP3450597A1 (de) 2019-03-06
CH714101A1 (de) 2019-03-15
CN109423714B (zh) 2022-06-24
CN109423714A (zh) 2019-03-05

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