EP0731211B1 - Dispositif à jet - Google Patents

Dispositif à jet Download PDF

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Publication number
EP0731211B1
EP0731211B1 EP19960102311 EP96102311A EP0731211B1 EP 0731211 B1 EP0731211 B1 EP 0731211B1 EP 19960102311 EP19960102311 EP 19960102311 EP 96102311 A EP96102311 A EP 96102311A EP 0731211 B1 EP0731211 B1 EP 0731211B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
cleaning
pressure
jet
web
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.)
Expired - Lifetime
Application number
EP19960102311
Other languages
German (de)
English (en)
Other versions
EP0731211A1 (fr
Inventor
Wolfgang Schneider
Hans-Peter Dr. Sollinger
Karlheinz Straub
Jürgen BANNING
Markus Oechsle
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.)
Voith Patent GmbH
Original Assignee
Voith Paper Patent GmbH
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
Priority claimed from DE19507938A external-priority patent/DE19507938C2/de
Priority claimed from DE19539015A external-priority patent/DE19539015C2/de
Priority claimed from DE1995148302 external-priority patent/DE19548302A1/de
Application filed by Voith Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Priority to EP01115572A priority Critical patent/EP1130158A3/fr
Publication of EP0731211A1 publication Critical patent/EP0731211A1/fr
Application granted granted Critical
Publication of EP0731211B1 publication Critical patent/EP0731211B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/04—Paper-break control devices
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/32—Washing wire-cloths or felts
    • D21F1/325—Washing wire-cloths or felts with reciprocating devices
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00—Other accessories for paper-making machines
    • D21G9/0063—Devices for threading a web tail through a paper-making machine
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/202—With product handling means
    • Y10T83/2066—By fluid current

Definitions

  • the invention relates to a beam device for a machine for making a web, in particular a paper or cardboard web, according to claim 1, the use of a nozzle device for Delivery of a jet of liquid under pressure having pointed tailor, according to claim 7 and the use of a nozzle device to deliver a pressurized Liquid jet cleaning device, according to claim 8.
  • Conveyor belts especially fabric belts, are used, which is contaminated in the course of operating the machine become; Meshes or pores of the ribbons for example of paper fibers, adhesives or Impact added.
  • a beam device that can be used for this, which is designed as a cleaning device known from DE 92 08 909 U1.
  • the thought was expressed, across the direction of walking movable spray nozzles of the conveyor belt To be provided by spraying the conveyor belt Clean the liquid.
  • Tailors are also known, the one within a paper making machine a conveyor belt moving material web apply a beam to a strip of Material web, especially one as a ribbon designated threading strip, to separate the is passed through the paper making machine, to then thread the entire web of material.
  • a nozzle device is known from EP 0 009 909 A1 to deliver a jet of liquid under pressure for cleaning a conveyor belt a paper machine.
  • the nozzle device includes a switching device with whose help the pressure of the liquid jet is adjustable.
  • a first pressure of the liquid jet is in a range of approximately 20 bar to 30 bar.
  • the switching device By actuation the switching device, the pressure of the Liquid jet reduced to approximately 2 bar.
  • Switching device can be the conveyor belt cleaned with different intensity become.
  • the beam device has one Nozzle device for dispensing a pressurized on the material web and / or on the material web leading conveyor belt directed liquid jet on.
  • the beam device includes also a switching device with the help the pressure at which the liquid jet is applied to the Conveyor belt or the material web hits, is adjustable.
  • you press the Liquid jet is the jet device as Tip cutter to separate a strip from the material web and at a second print of the Liquid jet as a cleaning device for Can be used to clean the conveyor belt.
  • the switching device can be ensured that the second pressure of the liquid jet so is small that the conveyor belt when cleaning suffered no harm.
  • An embodiment is particularly preferred the beam device, which is characterized by that the switching device to a supply facility acts through which the nozzle device is supplied with the liquid.
  • the constructive Effort required to implement the described here Beam device is required can be with it to a minimum, so that on the one hand the additional space requirement and on the other hand the costs are minimal for the switching device.
  • the object of the invention also relates to the use one a nozzle device for dispensing a jet of liquid under pressure having pointed tailor with the characteristics of claim 7 as a device for cleaning a Conveyor belt of a paper making machine.
  • the subject matter of the invention therefore also relates the use of a cleaning device for cleaning the conveyor belt of a machine for manufacturing a material web with the characteristics of Claim 8.
  • a switching device provided by means of which the pressure is adjustable with which the liquid jet onto the conveyor belt or the material web hits.
  • FIG. 1 shows a section of a machine 1 for making a web.
  • a machine 1 for making a web.
  • it is a paper making machine, which has a number of rollers around which the web to be produced, namely the paper web 3 with With the help of a conveyor belt, namely a dryer fabric 5 is led around.
  • They are exemplary here two drying cylinders 7 and 9 indicated, the Central axes indicated on an imaginary line 11 are.
  • this line 11 is another Roller, for example a web guide roller or a drying cylinder indicated.
  • a Tip cutter 15 trained beam device arranged, which has a nozzle device 17, with the help of a liquid jet, not shown here on the surface of the paper web 3 is directed.
  • the nozzle device 17 is on one transverse to the direction of conveyance indicated by an arrow the web 3 extending support beam 19 attached.
  • a suitable roller device 21 By means of a suitable roller device 21 the nozzle device 17 is displaceable transversely to the web 3 stored.
  • the support beam 19 is over a support arm 23 pivotally attached to a bearing 25.
  • the pivotal movement is determined by a suitable one Drive device, for example a hydraulic or pneumatic cylinder device 27 includes, causes.
  • Figure 1 is with solid lines indicate the working position of the tip cutter 15 reproduced. With the help of dashed lines Lines is the withdrawn from which Track surface swung away rest position of the Tip cutter 15 shown.
  • the nozzle device 17 comprises a nozzle holder 29, the single nozzle not shown here has, with the help of liquid under high Pressure on the web 3 is directed.
  • the Tip cutter 15 leads the movably mounted Nozzle holder 29 opposite the nozzle device 17 a relative movement.
  • the area of impact of the Liquid jet on the web 3 results in a Cutting line through the superposition of the conveying movement the path 3 and the relative movement of the Nozzle carrier 29 opposite the nozzle device 17 not straight, but wavy.
  • the speed of the web 3 respectively the dryer fabric 5 is also called the machine speed denotes v.
  • Figures 2 to 4 are cutting lines shown, when using a tip cutter 15 with a rotating nozzle carrier 29 if provided with a single nozzle 33 is provided, which is indicated in Figure 2.
  • Figure 2 shows the edge region of the web 3, which, like indicated by an arrow on the rotating Nozzle carrier 29 is passed.
  • the liquid jet 35 which on the surface of the web 3 hits, leaves a cutting line, the closed Includes loops and about the shape of a Cycloid features.
  • the transfer strip 37 which after a web break or when starting up the machine for manufacture a paper web threaded through the machine 1 becomes.
  • Below the cutting line is the remaining web or residual paper web 39, which is reprocessed and for example in the basement.
  • the Areas of paper lying within the closed loops 41 form waste that may uncontrolled with the dryer 5 through the machine passed through to produce a web becomes.
  • the rotational speed of the nozzle carrier 29 is therefore preferably the machine speed v adapted that the of the web 3 in Path s covered at least in the direction of the arrow is equal to twice the distance r between the individual nozzles 33 of the axis of rotation 31 multiplied by the mathematical number ⁇ (3.14159 7) representing the ratio from circumference to diameter.
  • the section line S shown in Figure 2 shows an operating case in which the rotational speed of the nozzle carrier 29 is so small that the Path 3 covered distance s is less than twice the distance r of the individual nozzle 33 from the Axis of rotation 31 multiplied by ⁇ .
  • Figure 3 shows the limit case where the machine speed v is so large that during the time t covered by the path t of the path 3 is the same size as the double distance r multiplied with ⁇ .
  • section line S approximately Form of a cycloid that has no closed Loops shows.
  • the transfer strip 37 is thus separated from the residual paper web 39 without waste.
  • An optimal cutting line S is shown in FIG. 4.
  • the nozzle holder 29 compared to the nozzle device 17 also can perform an oscillating movement at which the single nozzle 33 opposite the web 3 one Performs a pendulum motion that is roughly on a line takes place, which is transverse to the direction of the web 3. It is also possible for the nozzle holder 29 a wobble movement relative to the nozzle device 17 executes in addition to that described Given an oscillatory movement a movement component is where the nozzle carrier alternates in the conveying direction and against the conveying direction of the Lane 3 moves.
  • the liquid jet 35 provided that it is supported by the dryer 5 Lane 3 hits with a pressure of 100 bar to 800 bar, preferably from 200 bar to 500 bar. Especially with a pressure range from 200 bar to 500 bar has shown that there is a safe separation between transfer strip 37 and residual web 39 results and that damage to the dryer wire 5 can be practically excluded, at least, when the machine is running, i.e. the dryer is moving and when the nozzle holder rotates.
  • the tip cutter 15 it acts on the web 3 in an area in which this on a roller, be it on a Drying cylinder 7 or 9 or on a web guide roller 13 rests.
  • the pressure, under the liquid jet 35 from the individual nozzle 33 emerges in a range from 100 bar to 2000 bar are, preferably a pressure of 500 bar to 1500 bar selected.
  • the tip cutter 15 is preferably designed such that that the pressure under which the liquid jet 35 emerges from the single nozzle 33, depending from the point of impact to lane 3 and adjustable depending on their basis weight is. This ensures that the Tip cutter 15 can be used universally.
  • FIG. 5 shows an embodiment of a cleaning device 102 trained beam device, which for cleaning one in the following as Dryer screen 104 designated dryer fabric belt in Area of a roller 106 of a not shown Paper machine is arranged.
  • the cleaning device 102 can be used for any conveyor belt Paper or board making machine used be, for example for sieve belts or Felt a sieve or one Press or dryer section of a paper machine. The following is purely exemplary of dryer fabric conveyors a paper machine.
  • the Cleaning device 102 includes one below Rotorduse designated as cleaning nozzle 108 a rotatable nozzle head 110, the one not nozzle arrangement shown. This nozzle arrangement can end one or more tangentially outflow Driving nozzles for generating a rotational movement in the range of 2000 to 3000 revolutions per minute and one or more Cleaning nozzles that the dryer wire 104 with a Apply cleaning medium.
  • a cylindrical one Suction cup 114 provided the cleaning nozzle 108 and surrounds the nozzle head 110.
  • the inner the suction cup 114 is in flow with one Suction line 116 connected, and forms one the suction space 118 assigned to the cleaning nozzle 108.
  • the suction cup can also be oval, wherein the nozzle head 110 is also arranged eccentrically can be.
  • the cleaning device 102 comprises an energy chain for media supply, of which only a high-pressure hose that can be connected to a high-pressure pump 120 to supply the cleaning nozzle 108 with liquid in a pressure range of 100 bar to 1000 bar, preferably from 100 bar to 400 bar, in particular from 150 bar to 300 bar and the Suction line 116 for removing spray water or water mist with dirt particles present in it from the suction chamber 118 is shown.
  • the device components described so far of the cleaning device 102 are on a traversing trolley 111 in a direction transverse to the running direction of the dryer wire 104 is displaceably arranged.
  • the traversing carriage 111 sits on cross beams 112 and is from a traversing motor, not shown can be driven at a specifiable speed, the traversing speed is usually is in the range of 0.3 m / min.
  • the arrangement of the cleaning device in the area the roller 106 has the following advantage: the stitches of the transport screen 104 are by the deflection widened on the roller so that the cleaning medium particularly easy in the tissue formation of the transport sieve penetrate and contaminants can remove very effectively.
  • the Cleaning nozzle 108 or the nozzle arrangement in the nozzle head 110 via the high pressure hose 120 with a cleaning medium, preferably with pressurized water.
  • the Nozzle head 110 with the arrangement of individual nozzles is due to the recoil effect of the propellant nozzle set in rotation. This describes the Liquid jet one at a certain angle to the longitudinal axis 126 of the cleaning nozzle conical path 127. It therefore falls below at an angle on the drying wire 104 and loose so the contaminants from its surface.
  • nozzle head 110 or several pivoted, an oscillating movement to provide single nozzles the during the traversing movement of the nozzle head 110 a band-shaped area of the dryer fabric 104 paint over.
  • the cleaning nozzle 108 or the individual Nozzles in the nozzle head 110 are for a pressure range from 100 bar to 1000 bar, preferably from Designed from 100 bar to 400 bar and have a nozzle diameter from 0.1 to 0.8 mm, preferably from 0.2 mm to 0.4 mm. Have proven themselves Pressure values from 150 bar to 300 bar and nozzle diameter from 0.2 mm to 0.4 mm.
  • nozzle material are diamond or ruby, preferably sapphire or ceramic materials used.
  • the cleaning device 102 is preferably so arranged that the cleaning medium to an area of the transport screen 104, which is very close is arranged on the surface of the deflecting roller. This ensures that the transport sieve when hitting the cleaning medium only deformed very little so that the energy lost very much is low.
  • the cleaning device can also in Area of the incoming nip N can be arranged. This allows the overpressure in the area of the incoming Nips N support the suction effect of the suction chamber, so that detached particles are particularly effective dissipated from the surface of the transport sieve be, with at most very little cleaning medium emerges from the suction chamber.
  • Beam equipment is common that one here Switching device, not shown, is provided with the help of which the pressure can be adjusted with the medium emerging from the jet device on the conveyor belt or on the Material web hits. Because of the switch it is possible to use the beam device both as a tip cutter as well as a cleaning device use.
  • the one for use as a tailor required pressure is - depending on the single nozzle used - 200 to 300 bar less than him required when used as a cleaning device is.
  • the switching device can Cause a pressure difference of 100 bar to 600 bar.
  • the beam device several Nozzles, at least two individual nozzles, with different Has diameters with the switching device interact.
  • the switching device can - with constant supply pressure - the single nozzle with the smaller one A liquid is applied to the diameter, if the beam device as a tip cutter is used.
  • the single nozzle with the larger diameter with the supply pressure be applied, if the beam device serves as a cleaning device if so the liquid jet with a lower one Pressure should hit the conveyor belt.

Claims (9)

  1. Dispositif à jet (15; 102) pour une machine de fabrication d'une bande de matériau (3), en particulier d'une bande de papier ou de carton, avec un dispositif de tuyère (17; 108) destiné à délivrer un jet de liquide se trouvant sous pression, dirigé vers la bande de matériau (3) et/ou sur une bande transporteuse (5; 104) guidant la bande de matériau (3), et avec un dispositif d'inversion, à l'aide duquel il est possible de régler la pression avec laquelle le jet de liquide arrive sur la bande transporteuse (5; 104), respectivement sur la bande de matériau (3), dans lequel le dispositif à jet (15; 102) peut être employé avec une première pression du jet de liquide comme couteau effilé pour la séparation d'un ruban de la bande de matériau (3) et avec une seconde pression du jet de liquide comme dispositif de nettoyage pour nettoyer la bande transporteuse (5; 104).
  2. Dispositif à jet suivant la revendication 1, caractérisé en ce que le dispositif d'inversion agit sur au moins une conduite d'alimentation, par laquelle le dispositif de tuyère (17; 108) est alimenté en liquide.
  3. Dispositif à jet suivant la revendication 1, caractérisé en ce que le dispositif de tuyère (17; 108) présente au moins deux tuyères individuelles de diamètres différents, qui coopèrent avec le dispositif d'inversion.
  4. Dispositif à jet suivant l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif de tuyère (17; 108) présente une tête de tuyère (29; 110) rotative.
  5. Dispositif à jet suivant l'une quelconque des revendications précédentes, caractérisé en ce que l'on utilise comme dispositif de tuyère (17; 108) un couteau effilé (15), qui sert pour la séparation d'un ruban d'une bande de matériau (3) mue par la bande transporteuse (5).
  6. Dispositif à jet suivant l'une quelconque des revendications 1 à 4, caractérisé en ce que l'on utilise comme dispositif de tuyère (17; 108) un dispositif de nettoyage (102), qui sert pour le nettoyage d'une bande transporteuse (104) d'une machine de fabrication d'une bande de matériau (3), en particulier d'une bande de papier ou de carton.
  7. Utilisation d'un couteau effilé (15) présentant un dispositif de tuyère (17) destiné à délivrer un jet de liquide se trouvant sous pression, qui sert pour la séparation d'un ruban d'une bande de matériau (3) mue par une bande transporteuse (5; 104), comme dispositif pour le nettoyage d'une bande transporteuse (5; 104) d'une machine de fabrication de papier, dans laquelle la pression, avec laquelle le jet de liquide arrive sur la bande transporteuse (5; 104), est réglée de façon correspondante au moyen d'un dispositif d'inversion.
  8. Utilisation d'un dispositif de nettoyage (102) présentant un dispositif de tuyère (108) destiné à délivrer un jet de liquide se trouvant sous pression, pour le nettoyage d'une bande transporteuse (5; 104) d'une machine de fabrication d'une bande de matériau (3), en particulier d'une bande de papier ou de carton, comme couteau effilé, dans laquelle la pression, avec laquelle le jet de liquide arrive sur la bande de matériau (3), est réglée de façon correspondante au moyen d'un dispositif d'inversion.
  9. Dispositif à jet suivant l'une quelconque des revendications 1 à 6, caractérisé en ce que le dispositif d'inversion provoque une différence entre la première pression et la seconde pression du jet de liquide de 100 bar à 600 bar, de préférence de 200 bar à 300 bar.
EP19960102311 1995-02-24 1996-02-16 Dispositif à jet Expired - Lifetime EP0731211B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP01115572A EP1130158A3 (fr) 1995-02-24 1996-02-16 Appareil de coupe en pointe

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
DE19507938 1995-02-24
DE19507938A DE19507938C2 (de) 1995-02-24 1995-02-24 Reinigungsvorrichtung
DE19539015 1995-10-19
DE19539015A DE19539015C2 (de) 1995-02-24 1995-10-19 Reinigungsvorrichtung
DE19548302 1995-12-22
DE1995148302 DE19548302A1 (de) 1995-12-22 1995-12-22 Spitzenschneider
DE19548893 1995-12-29
DE19548893A DE19548893A1 (de) 1995-02-24 1995-12-29 Strahleinrichtung

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP01115572A Division EP1130158A3 (fr) 1995-02-24 1996-02-16 Appareil de coupe en pointe

Publications (2)

Publication Number Publication Date
EP0731211A1 EP0731211A1 (fr) 1996-09-11
EP0731211B1 true EP0731211B1 (fr) 2002-06-05

Family

ID=27438073

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19960102311 Expired - Lifetime EP0731211B1 (fr) 1995-02-24 1996-02-16 Dispositif à jet

Country Status (4)

Country Link
US (1) US5879515A (fr)
EP (1) EP0731211B1 (fr)
CA (1) CA2170300A1 (fr)
FI (2) FI112099B (fr)

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Also Published As

Publication number Publication date
US5879515A (en) 1999-03-09
FI960845A (fi) 1996-08-25
FI112099B (fi) 2003-10-31
CA2170300A1 (fr) 1996-08-25
FI20011462A (fi) 2001-07-04
FI960845A0 (fi) 1996-02-23
EP0731211A1 (fr) 1996-09-11

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