WO2009143809A1 - Apparatus for treating sheetlike material by means of a pressurized medium - Google Patents

Apparatus for treating sheetlike material by means of a pressurized medium Download PDF

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Publication number
WO2009143809A1
WO2009143809A1 PCT/DE2009/000705 DE2009000705W WO2009143809A1 WO 2009143809 A1 WO2009143809 A1 WO 2009143809A1 DE 2009000705 W DE2009000705 W DE 2009000705W WO 2009143809 A1 WO2009143809 A1 WO 2009143809A1
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WO
WIPO (PCT)
Prior art keywords
nozzle
pressure
controllable
bars
bar
Prior art date
Application number
PCT/DE2009/000705
Other languages
German (de)
French (fr)
Inventor
Thomas Weigert
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Fleissner Gmbh
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Publication date
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Publication of WO2009143809A1 publication Critical patent/WO2009143809A1/en

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H18/00—Needling machines
    • D04H18/04—Needling machines with water jets
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • D04H1/492—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres by fluid jet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
    • B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
    • B05B9/0403—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material
    • B05B9/0423—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material for supplying liquid or other fluent material to several spraying apparatus

Definitions

  • the invention relates to a device for acting on sheet material by means of a pressurized medium according to the preamble of claim 1.
  • DE 603 07 058 T2 discloses a device for the admission of sheet material by means of a fluid under pressure.
  • the device consists of a nozzle bar (water bar), which has on its underside a nozzle strip with a plurality of fine outlet openings for a pressurized medium, in particular water.
  • the woven, knitted fabric or nonwoven fabric (nonwoven) which is preferably transported in the form of a web under the nozzle bar, is acted upon by the pressurized water jets. In the case of a nonwoven, such a solidification or entanglement of the fibers or filaments can be produced.
  • devices for hydrodynamic loading are known, in which the needling drums are assigned a plurality of nozzle bars. Depending on the application, the nozzle bars can work simultaneously, with different operating parameters being set. Also, one or more nozzle bars may remain off. For this purpose, the nozzle bars are connected to controllable high-pressure pumps for supplying pressure to the fluid to be acted upon.
  • Object of the present invention is to improve a device of the generic type and in particular to enable switching operations during operation.
  • each of the two nozzle strips is connected to its own controllable pressure supply and to switch from one nozzle bar to the other nozzle bar, the one pressure supply shut down while the second pressure supply is started up.
  • the time courses (curves) according to which one pressure supply is lowered while the other pressure supply is raised, are selected in such a way that the type and quality of the hydrodynamic admission of the material to be processed does not change during this switching process.
  • the curves are selected so that the sum of the hydrodynamic energy, which is introduced by the two nozzle bars in the estate remains the same.
  • the at least two nozzle bars between which can be switched, connected to a respective controllable high-pressure pump as a pressure supply.
  • a controller Via a controller, the two high-pressure pumps are now operated as described above, ie the power of one pump is raised, while the other high pressure pump is shut down.
  • the control unit controls the pumping up and down according to stored characteristic curves (curves).
  • a preferred embodiment of the invention provides for a system with a plurality of nozzle bars, which are assigned to a plurality of sewing drums and / or needling bands as processing stations, that each nozzle bar of a processing station acts as a switchable reserve bar.
  • These reserve nozzle bars are connected via switchable valves to a common high-pressure pump, which is connected to a controller.
  • the other nozzle bars are fed by separate high-pressure pumps, which are also connected to the controller.
  • controllable pressure suppliers are controllable high pressure pumps.
  • a controllable pressure supplier can also be provided with a controllable throttle, a high-pressure pump.
  • the pressure suppliers are appropriately controllable vapor pressure generators.
  • FIG. 1 shows a processing station in the form of a Vernade- treatment drum 1, the two nozzle bars 2, 3 are assigned.
  • suction and other hydrodynamic processing facilities are known per se and not shown.
  • the two nozzle bars are each connected to a controllable pressure supplier 4, 5.
  • the two pressure supplier 4, 5 are connected to a controller 6.
  • the controller 6 controls after given command to switch between the two nozzle bars 2, 3 the pressure supplier 4 from the output value P4 to a predetermined characteristic to zero, while the pressure supplier 5 is raised from zero to the pressure value P5.
  • FIG. 2 shows the pressure curve P as a function of the time t, that is to say the pressure values P4, P5 over the time t, with which the nozzle bars 2, 3 are acted on during the switching by the pressure suppliers 4, 5. Simplified are currently indicated pressure gradients over time. The more detailed relationship is explained below.
  • FIG. 3 describes an embodiment of the invention in which nozzle bars D1-D12 are arranged as processing stations in a total of four groups.
  • the nozzle bars D1 - D12 are assigned in principle to indicated circulating conveyor belts or needling drums. The path of the material to be processed is not shown.
  • the nozzle bars D1, D4, D5, D7, D8, D9, D10, D11 in the stations are each connected to their own controllable high-pressure pump HD1, HD4, HD5, HD7, HD8, HD9, HD10, HD11. These nozzle bars D1, D4, D5, D7, D8, D9, D10, D11 are in operation during production and are charged according to the intended production method.
  • the nozzle bars D2, D3, D6 and D12 are connected via switching valves V2, V3, V6 and V12 to a high-pressure pump HD as a pressure supply.
  • the high-pressure pump HD and the other high-pressure pumps HD1 - HD12 are in operative connection with a control, not shown, which controls the individual pumps both in production and for switching between nozzle bars.
  • these nozzle bars D2, D3, D6 and D12 connected to the central high-pressure pump are usually not in operation. If it is now desired to change the nozzle strip in one of the nozzle bars D1, D4, D5, D7, D8, D9, D10, D11, then the nozzle bar D2, D3, D6 or D12 present in the corresponding station is switched on.
  • the nozzle strip D8 has to be replaced by the nozzle strip.
  • the plant is in production, i. the nozzle bars D1, D4, D5, D7, D8, D9,
  • High-pressure pump HD started.
  • the high-pressure pump HD is now raised after opening the valve V6, ie the pressure for the nozzle bar D6 is continuously increased from zero to the pressure value with which the nozzle bar D8 was acted upon during operation.
  • the high-pressure pump HD8 of the nozzle beam D8 is steadily lowered from the initial value during operation to the value zero. hazards.
  • the admission of the material web takes place now instead of nozzle bar D8 by nozzle bar D6.
  • Wi 3600 * k * n * ( ⁇ * d 2/4 ) * ⁇ / (2 * g * p * 10)
  • Wi water flow per nozzle bar in m 3 / h (cubic meters per hour) and per meter working width (per meter of nozzle bar)
  • Ei hydraulic connection energy of the nozzle bar Di, expressed in kWh per meter working width (per meter of jet bar)
  • d diameter of a water jet or an outlet opening for a water jet in meters
  • n number of water jets per meter (number of outlet openings)
  • the hydraulic connection energy introduced by a plurality of nozzle bars Di into a material to be treated is thus:
  • the time function of the water pressure p2 (t) for the second nozzle bar D2 can thus be determined when the water pressure for the nozzle bar D1 is reduced after the time function p1 (t). Exactly then, the hydraulic energy introduced into the material (per unit time and given machine speed) remains constant.

Abstract

The invention relates to an apparatus for treating sheetlike material by means of a pressurized medium, the apparatus consisting of two nozzle beams, pressure supplies positioned upstream of the nozzle beams and also a control system connected to the pressure supply. According to the invention, the nozzle beams (2, 3) are each assigned a controllable pressure supply (4, 5) and the control system (6) for switching between the nozzle beams (2, 3) makes it possible to vary the pressure application to/of the nozzle beams (2, 3) in a predictable manner via the pressure supplies (4, 5).

Description

Vorrichtung zur Beaufschlagung von flächigem Material mittels eines unter Druck stehenden Mediums Device for acting on sheet material by means of a pressurized medium
Die Erfindung betrifft eine Vorrichtung zur Beaufschlagung von flächigem Material mittels eines unter Druck stehenden Mediums gemäß dem Oberbegriff von Anspruch 1.The invention relates to a device for acting on sheet material by means of a pressurized medium according to the preamble of claim 1.
Aus der DE 603 07 058 T2 ist eine Vorrichtung zur Beauf- schlagung von flächigem Material mittels einem unter Druck stehenden Fluid bekannt. Die Vorrichtung besteht jeweils aus einem Düsenbalken (Wasserbalken), der an seiner Unterseite einen Düsenstreifen mit einer Vielzahl feiner Austrittsöffnungen für ein unter Druck stehendes Medium, insbesondere Wasser aufweist. Der vorzugsweise in Form einer Bahn unter dem Düsenbalken transportierte gewebte, gewirkte Stoff bzw. Vliesstoff (Nonwoven) wird mit den Druckwasserstrahlen beaufschlagt. Bei einem Vlies kann so eine Verfestigung bzw. eine Verschlingung der Fasern, der Filamente erzeugt werden.DE 603 07 058 T2 discloses a device for the admission of sheet material by means of a fluid under pressure. The device consists of a nozzle bar (water bar), which has on its underside a nozzle strip with a plurality of fine outlet openings for a pressurized medium, in particular water. The woven, knitted fabric or nonwoven fabric (nonwoven), which is preferably transported in the form of a web under the nozzle bar, is acted upon by the pressurized water jets. In the case of a nonwoven, such a solidification or entanglement of the fibers or filaments can be produced.
Aus der DE 10 2004 030 413 A1 bzw. der DE 10 2004 049 146 A1 sind Einrichtungen zur hydrodynamischen Beaufschlagung bekannt, bei der den Vernadelungstrommeln mehrere Düsenbalken zugeordnet sind. Je nach Anwendung können die Dü- senbalken gleichzeitig arbeiten, wobei unterschiedliche Betriebsparameter zur Einstellung kommen. Auch können eine oder mehrere Düsenbalken abgeschaltet bleiben. Hierzu sind die Düsenbalken mit steuerbaren Hochdruckpumpen zur Druckversorgung für das zu beaufschlagende Fluid verbunden.From DE 10 2004 030 413 A1 or DE 10 2004 049 146 A1, devices for hydrodynamic loading are known, in which the needling drums are assigned a plurality of nozzle bars. Depending on the application, the nozzle bars can work simultaneously, with different operating parameters being set. Also, one or more nozzle bars may remain off. For this purpose, the nozzle bars are connected to controllable high-pressure pumps for supplying pressure to the fluid to be acted upon.
Aus der DE 101 12 446 A1 ist eine Wechselvorrichtung für den Düsenstreifen eines Düsenbalkens bekannt. Hierdurch lässt sich der Düsenstreifen schneller auswechseln, der Düsenbalken ist während der Auswechselzeit aber abzuschalten, was eine Unterbrechung des Produktionsprozesses bzw. Aus- schuss bedingt.From DE 101 12 446 A1 a changing device for the nozzle strip of a nozzle beam is known. This leaves the nozzle strip is replaced faster, but the nozzle bar is switched off during the replacement time, which causes an interruption of the production process or scrap.
Aufgabe der vorliegenden Erfindung ist es, eine Vorrichtung der gattungsgemäßen Art zu verbessern und insbesondere Umschaltvorgänge während des Betriebes zu ermöglichen.Object of the present invention is to improve a device of the generic type and in particular to enable switching operations during operation.
Gelöst wird diese Aufgabe durch die kennzeichnenden Merkmale des Hauptanspruches. Vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen.This object is achieved by the characterizing features of the main claim. Advantageous developments of the invention will become apparent from the dependent claims.
Gemäß der Erfindung ist vorgesehen, dass jeder der beiden Düsenstreifen an eine eigene steuerbare Druckversorgung geschaltet ist und zum Umschalten von einem Düsenbalken auf den anderen Düsenbalken die eine Druckversorgung heruntergefahren während die zweite Druckversorgung hochgefahren wird. Die Zeitverläufe (Kurven), nach denen die eine Druckversorgung runter und gleichzeitig die andere Druckversorgung hochgefahren wird, sind derartig gewählt, so dass sich während dieses Umschaltvorganges die Art und Qualität der hydrodynamischen Beaufschlagung des zu bearbeitenden Gutes nicht verändert. Insbesondere sind die Kurven so gewählt, dass die Summe der hydrodynamischen Energie, welche durch die beiden Düsenbalken in das Gut eingebracht wird, gleich bleibt.According to the invention, it is provided that each of the two nozzle strips is connected to its own controllable pressure supply and to switch from one nozzle bar to the other nozzle bar, the one pressure supply shut down while the second pressure supply is started up. The time courses (curves) according to which one pressure supply is lowered while the other pressure supply is raised, are selected in such a way that the type and quality of the hydrodynamic admission of the material to be processed does not change during this switching process. In particular, the curves are selected so that the sum of the hydrodynamic energy, which is introduced by the two nozzle bars in the estate remains the same.
Gemäß einer Ausgestaltung der Erfindung sind die wenigstens zwei Düsenbalken, zwischen denen umgeschaltet werden kann, an jeweils eine steuerbare Hochdruckpumpe als Druckversorgung geschaltet. Über eine Steuerung werden die beiden Hochdruckpumpen nun wie zuvor beschrieben gefahren, d.h. die Leistung der einen Pumpe wird hochgefahren, währen die andere Hochdruckpumpe heruntergefahren wird. Die Steuerung nimmt das Hoch- und Runterfahren der Pumpen entsprechend gespeicherter Kennlinien (Kurven) vor.According to one embodiment of the invention, the at least two nozzle bars, between which can be switched, connected to a respective controllable high-pressure pump as a pressure supply. Via a controller, the two high-pressure pumps are now operated as described above, ie the power of one pump is raised, while the other high pressure pump is shut down. The control unit controls the pumping up and down according to stored characteristic curves (curves).
Eine bevorzugte Ausgestaltung der Erfindung sieht bei einer Anlage mit mehreren Düsenbalken, welche mehreren Verna- delungstrommeln und/oder Vernadelungsbändern als Bearbeitungsstationen zugeordnet sind, vor, dass jeweils ein Düsen- balken einer Bearbeitungsstation als zuschaltbarer Reservebalken fungiert. Diese Reserve-Düsenbalken sind über schaltbare Ventile an eine gemeinsame Hochdruckpumpe angeschlossen, welche mit einer Steuerung verbunden ist. Die weiteren Düsenbalken werden von separaten Hochdruckpumpen gespeist, die ebenfalls mit der Steuerung verbunden sind. Nun kann in jeder der Bearbeitungsstationen während des Betriebes und ohne Produktionsausfall bzw. Produktion minderer Qualität der Düsenstreifen eines Düsenbalkens gewechselt oder ein Düsenbalken getauscht oder umgebaut werden.A preferred embodiment of the invention provides for a system with a plurality of nozzle bars, which are assigned to a plurality of sewing drums and / or needling bands as processing stations, that each nozzle bar of a processing station acts as a switchable reserve bar. These reserve nozzle bars are connected via switchable valves to a common high-pressure pump, which is connected to a controller. The other nozzle bars are fed by separate high-pressure pumps, which are also connected to the controller. Now, in each of the processing stations can be changed during operation and without production loss or production of inferior quality of the nozzle strip of a nozzle bar or a nozzle bar replaced or rebuilt.
Dient die erfindungsgemäße Bearbeitungsstation der Wasser- strahlvernadelung, so handelt es sich bei den steuerbaren Druckversorgern um steuerbare Hochdruckpumpen. Als steuerbarer Druckversorger kann auch eine Hochdruckpumpe mit einer steuerbaren Drossel vorgesehen sein. Bei einer Einrichtung zur Heißdampfvemadelung handelt es sich bei den Druckversorgern um entsprechend steuerbare Dampfdruckerzeuger.If the processing station according to the invention is used for water jet needling, the controllable pressure suppliers are controllable high pressure pumps. As a controllable pressure supplier can also be provided with a controllable throttle, a high-pressure pump. In a device for superheated steam needling, the pressure suppliers are appropriately controllable vapor pressure generators.
Des Weiteren erfolgt die Erläuterung eines Ausführungsbeispieles anhand der Zeichnungen. Figur 1 zeigt eine Bearbeitungsstation in Form einer Vernade- lungstrommel 1 , der zwei Düsenbalken 2, 3 zugeordnet sind. In der Vernadelungstrommel vorzusehende Absaugeinrichtungen sowie weitere der hydrodynamischen Bearbeitung dienende Einrichtungen sind an sich bekannt und nicht dargestellt.Furthermore, the explanation of an embodiment with reference to the drawings. 1 shows a processing station in the form of a Vernade- treatment drum 1, the two nozzle bars 2, 3 are assigned. In the needling drum to be provided suction and other hydrodynamic processing facilities are known per se and not shown.
Die beiden Düsenbalken sind mit je einem steuerbaren Druck- versorger 4, 5 verbunden. Die beiden Druckversorger 4, 5 sind an eine Steuerung 6 geschaltet. Die Steuerung 6 regelt nach gegebenen Kommando zum Umschalten zwischen den beiden Düsenbalken 2, 3 den Druckversorger 4 vom Ausgangswert P4 nach einer vorgegeben Kennlinie auf Null, während der Druckversorger 5 von Null auf den Druckwert P5 hochgefahren wird. Die Figur 2 zeigt den Druckverlauf P als Funktion der Zeit t, also die Druckwerte P4, P5 über die Zeit t, mit denen die Düsenbalken 2, 3 während des Umschaltens durch die Druckversorger 4, 5 beaufschlagt werden. Vereinfacht sind gerade Druckverläufe über die Zeit angedeutet. Der genauere Zusammenhang wird weiter unten erläutert.The two nozzle bars are each connected to a controllable pressure supplier 4, 5. The two pressure supplier 4, 5 are connected to a controller 6. The controller 6 controls after given command to switch between the two nozzle bars 2, 3 the pressure supplier 4 from the output value P4 to a predetermined characteristic to zero, while the pressure supplier 5 is raised from zero to the pressure value P5. FIG. 2 shows the pressure curve P as a function of the time t, that is to say the pressure values P4, P5 over the time t, with which the nozzle bars 2, 3 are acted on during the switching by the pressure suppliers 4, 5. Simplified are currently indicated pressure gradients over time. The more detailed relationship is explained below.
Figur 3 beschreibt eine Ausführungsform der Erfindung, bei der Düsenbalken D1 - D12 in insgesamt vier Gruppen als Bearbeitungsstationen angeordnet sind. Die Düsenbalken D1 - D12 sind prinzipiell angedeuteten umlaufenden Transportbändern bzw. Vernadelungstrommeln zugeordnet. Die Bahn des zu bearbeitenden Gutes ist nicht dargestellt.FIG. 3 describes an embodiment of the invention in which nozzle bars D1-D12 are arranged as processing stations in a total of four groups. The nozzle bars D1 - D12 are assigned in principle to indicated circulating conveyor belts or needling drums. The path of the material to be processed is not shown.
Die Düsenbalken D1 , D4, D5, D7, D8, D9, D10, D11 in den Stationen sind mit jeweils einer eigenen steuerbaren Hoch- druckpumpe HD1 , HD4, HD5, HD7, HD8, HD9, HD10, HD11 verbunden. Diese Düsenbalken D1 , D4, D5, D7, D8, D9, D10, D11 sind während der Produktion in Betrieb und werden entsprechend der vorgesehenen Produktionsweise beaufschlagt. Die Düsenbalken D2, D3, D6 und D12 sind über Schaltventile V2, V3, V6 und V12 mit einer Hochdruckpumpe HD als Druckversorgung verbunden. Die Hochdruckpumpe HD sowie die weiteren Hochdruckpumpen HD1 - HD12 stehen mit einer nicht dargestellten Steuerung in Wirkverbindung, welche die einzelnen Pumpen sowohl in der Produktion als auch zum Umschalten zwischen Düsenbalken ansteuert.The nozzle bars D1, D4, D5, D7, D8, D9, D10, D11 in the stations are each connected to their own controllable high-pressure pump HD1, HD4, HD5, HD7, HD8, HD9, HD10, HD11. These nozzle bars D1, D4, D5, D7, D8, D9, D10, D11 are in operation during production and are charged according to the intended production method. The nozzle bars D2, D3, D6 and D12 are connected via switching valves V2, V3, V6 and V12 to a high-pressure pump HD as a pressure supply. The high-pressure pump HD and the other high-pressure pumps HD1 - HD12 are in operative connection with a control, not shown, which controls the individual pumps both in production and for switching between nozzle bars.
Während der Produktion sind diese mit der zentralen Hochdruckpumpe verbundenen Düsenbalken D2, D3, D6 und D12 üblicherweise nicht in Betrieb. Soll nun in einem der Düsenbalken D1 , D4, D5, D7, D8, D9, D10, D11 der Düsenstreifen gewechselt werden, so erfolgt das Zuschalten des in der entspre- chenden Station vorhandenen Düsenbalkens D2, D3, D6 bzw. D12.During production, these nozzle bars D2, D3, D6 and D12 connected to the central high-pressure pump are usually not in operation. If it is now desired to change the nozzle strip in one of the nozzle bars D1, D4, D5, D7, D8, D9, D10, D11, then the nozzle bar D2, D3, D6 or D12 present in the corresponding station is switched on.
Im vorliegenden Beispiel sei angenommen, dass im Düsenbalken D8 der Düsenstreifen zu wechseln ist. Die Anlage ist in Produktion, d.h. die Düsenbalken D1, D4, D5, D7, D8, D9,In the present example, it is assumed that the nozzle strip D8 has to be replaced by the nozzle strip. The plant is in production, i. the nozzle bars D1, D4, D5, D7, D8, D9,
D10, D11 arbeiten, die Düsenbalken D2, D3, D6 und D12 sind nicht in Betrieb, die Ventile V2, V3, V6 und V12 sind geschlossen, die Hochdruckpumpe HD ist abgeschaltet.D10, D11 are working, nozzle bars D2, D3, D6 and D12 are not in operation, valves V2, V3, V6 and V12 are closed, high pressure pump HD is off.
Zur Vorbereitung des Düsenstreifenwechsels wird nun dieTo prepare the nozzle strip change is now the
Hochdruckpumpe HD gestartet. Die Hochdruckpumpe HD wird nun nach Öffnen des Ventils V6 hochgefahren, d.h. der Druck für den Düsenbalken D6 wird von Null stetig auf den Druckwert erhöht, mit dem der Düsenbalken D8 im Betrieb beaufschlagt wurde. Während des Hochfahrens der Hochdruckpumpe HD wird die Hochdruckpumpe HD8 des Düsenbalkens D8 stetig von dem Ausgangswert im Betrieb auf den Wert Null herunter- gefahren. Die Beaufschlagung der Materialbahn erfolgt nun anstelle Düsenbalken D8 durch Düsenbalken D6.High-pressure pump HD started. The high-pressure pump HD is now raised after opening the valve V6, ie the pressure for the nozzle bar D6 is continuously increased from zero to the pressure value with which the nozzle bar D8 was acted upon during operation. During start-up of the high-pressure pump HD, the high-pressure pump HD8 of the nozzle beam D8 is steadily lowered from the initial value during operation to the value zero. hazards. The admission of the material web takes place now instead of nozzle bar D8 by nozzle bar D6.
Nach dem Düsenstreifenwechsel im Düsenbalken D8 wird in analoger Weise wieder auf diesen Balken zurückgeschaltet. Während des Hochfahrens der Hochdruckpumpe HD8 wird die Hochdruckpumpe HD für den Düsenbalken D6 runtergefahren. Die Beaufschlagung der Materialbahn erfolgt nun wieder durch den Düsenbalken D8.After the nozzle strip change in the nozzle bar D8 is switched back to this bar in an analogous manner. During startup of the high-pressure pump HD8, the high-pressure pump HD for the nozzle bar D6 is shut down. The loading of the material web is now again through the nozzle bar D8.
Des Weiteren wird erläutert, nach welcher Zeitfunktion der Druck bei einem Düsenbalken hochzufahren ist, wenn der Wasserdruck in dem zweiten Düsenbalken gemäß einem vorgegebenen Zeitverlauf heruntergefahren wird.Furthermore, it is explained after which time function the pressure at a nozzle bar is to be raised when the water pressure in the second nozzle bar is shut down according to a predetermined time profile.
Für einen Düsenbalken Di berechnet sich der Durchsatz Wi und damit die durch den Düsenbalken Di in das zu behandelnde Material eingebrachte hydraulische Energie Ei wie folgt:For a nozzle bar Di, the throughput Wi and thus the hydraulic energy Ei introduced into the material to be treated by the nozzle bar Di are calculated as follows:
a) Wi = 3600*k*n*(π*d2/4)*Λ/ (2*g*p*10)a) Wi = 3600 * k * n * (π * d 2/4 ) * Λ / (2 * g * p * 10)
b) Ei = Wi *p/36b) Ei = Wi * p / 36
hierbei ist:Here is:
Wi = Wasserdurchsatz pro Düsenbalken in m3 /h (Kubikmeter pro Stunde) und pro Meter Arbeitsbreite (pro Meter Düsenbalken)Wi = water flow per nozzle bar in m 3 / h (cubic meters per hour) and per meter working width (per meter of nozzle bar)
Ei = Hydraulische Verbindungsenergie des Düsenbalkens Di, ausgedrückt in kWh pro Meter Arbeitsbreite (pro Meter Düsenbalken) d = Durchmesser eines Wasserstrahles bzw. einer Austrittsöffnung für einen Wasserstrahl in MeterEi = hydraulic connection energy of the nozzle bar Di, expressed in kWh per meter working width (per meter of jet bar) d = diameter of a water jet or an outlet opening for a water jet in meters
k = Formkoeffizient der Öffnungen - meist gleich 0,70k = shape coefficient of the openings - usually equal to 0.70
π = Kreiszahlπ = circle number
n = Zahl der Wasserstrahlen pro Meter (Zahl der Austrittsöffnungen)n = number of water jets per meter (number of outlet openings)
p = Wasserdruck in barp = water pressure in bar
g = Erdbeschleunigung in 9,81 m/s2 g = gravitational acceleration in 9.81 m / s 2
Die durch mehrere Düsenbalken Di in ein zu behandelndes Material eingebrachte hydraulische Verbindungsenergie ist somit:The hydraulic connection energy introduced by a plurality of nozzle bars Di into a material to be treated is thus:
EHT = EI + E2 + + EnEHT = EI + E2 + + En
Für zwei Düsenbalken gilt:For two nozzle bars:
EHT = E1 + E2EHT = E1 + E2
Als Funktion der Zeit t gilt für die eingebrachte hydraulische Verbindungsenergie:As a function of time t, the following applies to the hydraulic connection energy introduced:
EHT(t) = E1 (t) + E2(t)EHT (t) = E1 (t) + E2 (t)
Soll EHT = konstant sein, so gilt für den Zeitverlauf der durch die beiden Düsenbalken D1 und D2 eingebrachten hydraulischen Verbindungsenergien: EHT = Konstant = E1(t) + E2(t)If EHT = = constant, the hydraulic connection energies introduced by the two nozzle beams D1 and D2 are valid for the time course: EHT = constant = E1 (t) + E2 (t)
Wird also E1 (t) mit der Zeit t kleiner, so muss E2(t) größer werden, damit EHT = konstant, also EHT - E1(t) = E2(t)Thus, if E1 (t) becomes smaller with time t, then E2 (t) must become larger so that EHT = constant, ie EHT - E1 (t) = E2 (t)
Unter Verwendung der Formeln a) und b) kann somit die Zeitfunktion des Wasserdruckes p2(t) für den zweiten Düsenbalken D2 ermittelt werden, wenn der Wasserdruck für den Düsenbalken D1 nach der Zeitfunktion p1 (t) heruntergefahren wird. Genau dann bleibt die in das Material eingebrachte hydraulische Energie (pro Zeiteinheit und bei gegebener Maschinengeschwindigkeit) konstant. Using the formulas a) and b), the time function of the water pressure p2 (t) for the second nozzle bar D2 can thus be determined when the water pressure for the nozzle bar D1 is reduced after the time function p1 (t). Exactly then, the hydraulic energy introduced into the material (per unit time and given machine speed) remains constant.
Bezugszeichenliste:LIST OF REFERENCE NUMBERS
1 Vernadelungstrommel1 needle drum
2 Düsenbalken2 nozzle bars
3 Düsenbalken3 nozzle bars
4 Hochdruckpumpe4 high pressure pump
5 Hochdruckpumpe5 high pressure pump
6 Steuerung6 control
D1-D12 DüsenbalkenD1-D12 Nozzle Bar
HD1-HD12 HochdruckpumpeHD1-HD12 high pressure pump
V2 SperrventilV2 check valve
V3 SperrventilV3 check valve
V6 SperrventilV6 check valve
V12 SperrventilV12 check valve
HD Hochdruckpumpe HD high pressure pump

Claims

Ansprüche claims
1. Vorrichtung zur Beaufschlagung von flächigem Material mittels eines unter Druck stehenden Mediums, bestehend aus zwei Düsenbalken, den Düsenbalken vorgeordneten Druckversorgungen sowie einer mit der Druckversorgung verbundenen Steuerung, gekennzeichnet durch, den Düsenbalken (2, 3) ist je eine steuerbare Druckversorgung (4, 5) zugeordnet, wobei durch die Steuerung (6) zum Umschalten zwischen den Düsenbalken (2, 3) die Druckbeaufschlagung der Düsenbalken (2, 3) über die Druckversorgungen (4, 5) in vorgegebener Weise veränderbar ist.1. A device for acting on sheet material by means of a pressurized medium, consisting of two nozzle bars, the nozzle bar upstream pressure supplies and connected to the pressure supply control, characterized by, the nozzle bar (2, 3) is each a controllable pressure supply (4, 5), wherein by the controller (6) for switching between the nozzle bars (2, 3), the pressurization of the nozzle bars (2, 3) via the pressure supplies (4, 5) is variable in a predetermined manner.
2. Vorrichtung nach Anspruch 1 , gekennzeichnet durch, die Steuerung (6) enthält Kennlinien, nach denen die Druckbeaufschlagung eines Düsenbalkens (2) rauf- und die des anderen Düsenbalkens (3) runtergefahren wird.2. Apparatus according to claim 1, characterized by, the controller (6) contains characteristics according to which the pressurization of a nozzle bar (2) up and the other nozzle bar (3) is moved down.
3. Vorrichtung nach Anspruch 1 oder 2, gekennzeichnet durch, die Druckbeaufschlagung der Düsenbalken (2, 3) über die Druckversorgungen (4, 5) erfolgt in derartiger Weise, dass beim, Umschalten zwischen den Düsenbalken (2, 3) die in das zu behandelnde Material eingebrachte hydraulische Energie konstant bleibt. 3. Apparatus according to claim 1 or 2, characterized by, the pressurization of the nozzle bar (2, 3) via the pressure supplies (4, 5) takes place in such a way that when, switching between the nozzle bars (2, 3) in which treating material introduced hydraulic energy remains constant.
4. Vorrichtung nach Anspruch 1 , 2 oder 3, gekennzeichnet durch, ein steuerbarer Druckversorger (4, 5) ist als steuerbare Hochdruckpumpe ausgebildet.4. Apparatus according to claim 1, 2 or 3, characterized by, a controllable pressure supplier (4, 5) is designed as a controllable high-pressure pump.
5. Vorrichtung nach Anspruch 1 , 2 oder 3, gekennzeichnet durch, ein steuerbarer Druckversorger (4, 5) ist als eine Hochdruck- pumpe mit einer steuerbaren Drossel ausgebildet.5. Apparatus according to claim 1, 2 or 3, characterized by, a controllable pressure supplier (4, 5) is designed as a high-pressure pump with a controllable throttle.
6. Vorrichtung nach Anspruch 1 , 2 oder 3, gekennzeichnet durch, bei einer Einrichtung zur Heißdampfvernadelung ist der Druckversorger als ein steuerbarer Dampfdruckerzeuger ausgebildet.6. Apparatus according to claim 1, 2 or 3, characterized by, in a device for Heißdampfvernadelung the pressure supplier is designed as a controllable vapor pressure generator.
7. Vorrichtung nach einem der vorhergehenden Ansprüche, gekennzeichnet durch, bei einer Verarbeitungsmaschine mit mehreren jeweils mindestens zwei Düsenbalken (D1 - D12) aufweisenden Bearbeitungsstationen ist jeweils ein Düsenbalken (/D2, D3, D6, D12) je Bearbeitungsstati- on über ein schaltbares Ventil (V2, V3, V6, V12) mit einer steuerbaren Druckversorgung (HD) verbunden und die übrigen Düsenbalken (D1 , D4, D5, D7, D8, D9, D10, D11) sind mit jeweils einer eigenen steuerbaren Druckvorsorgung (HD1 - HD12) gekoppelt. 7. Device according to one of the preceding claims, characterized by, in a processing machine with a plurality of at least two nozzle bars (D1 - D12) having processing stations each have a nozzle bar (/ D2, D3, D6, D12) per processing station via a switchable valve (V2, V3, V6, V12) are connected to a controllable pressure supply (HD) and the remaining nozzle bars (D1, D4, D5, D7, D8, D9, D10, D11) each have their own controllable pressure supply (HD1 - HD12) coupled.
PCT/DE2009/000705 2008-05-27 2009-05-13 Apparatus for treating sheetlike material by means of a pressurized medium WO2009143809A1 (en)

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DE102010009203A1 (en) * 2010-02-24 2011-08-25 Sandler AG, 95126 Process and device for changing the structure in the production of hydroentangled, structured nonwovens

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