EP0818574B1 - Dispositif de nettoyage - Google Patents

Dispositif de nettoyage Download PDF

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Publication number
EP0818574B1
EP0818574B1 EP97106506A EP97106506A EP0818574B1 EP 0818574 B1 EP0818574 B1 EP 0818574B1 EP 97106506 A EP97106506 A EP 97106506A EP 97106506 A EP97106506 A EP 97106506A EP 0818574 B1 EP0818574 B1 EP 0818574B1
Authority
EP
European Patent Office
Prior art keywords
roll
paper machine
cleaning
roller
pressure
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
EP97106506A
Other languages
German (de)
English (en)
Other versions
EP0818574A2 (fr
EP0818574A3 (fr
Inventor
Karl Josef Boeck
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
Application filed by Voith Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP0818574A2 publication Critical patent/EP0818574A2/fr
Publication of EP0818574A3 publication Critical patent/EP0818574A3/fr
Application granted granted Critical
Publication of EP0818574B1 publication Critical patent/EP0818574B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • B08B3/022—Cleaning travelling work
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G3/00—Doctors

Definitions

  • the invention relates to a paper machine roller with a cleaning device for Cleaning the roller surface, the cleaning device Spraying device for spraying the roller with liquid cleaning medium and a device for removing the cleaning medium from the roller surface has, the spray device as a high-pressure spray device with a Working pressure of at least 10 bar, preferably of at least 40 bar, is formed, and wherein the means for removing the cleaning medium at least one seen in the direction of rotation of the roller behind the High-pressure spray device arranged scraper.
  • rollers must therefore constantly during the operation of the paper machine getting cleaned. This is usually done, as in DE-A 36 41 954 described, two scrapers arranged one behind the other are used, between which Liquid is sprayed onto the roller surface.
  • the object of the invention is therefore to provide a cleaning device Cleaning a roller in a paper machine to create an improved one Cleaning effect can be achieved even with heavy contamination of the roller.
  • this object is achieved in that in the direction of rotation of the roller seen behind the high pressure sprayer and in front of the at least one Scraper as a spray device for spraying the roller with liquid Cleaning medium trained rinsing device is arranged with a greater throughput of cleaning medium than the high-pressure spraying device is operated to rinse the roller surface.
  • the invention can be particularly advantageous Device for cleaning smooth rollers, such as ceramic or granite rollers that a particular susceptibility to contamination e.g. due to the deposition of calcium carbonate.
  • the high-pressure spray device itself can in preferred development of the invention either at least a needle spray tube or at least one Include high pressure rotary nozzle.
  • the high-pressure spray device comprises at least one needle spray tube, that parallel to the longitudinal axis of the roller is arranged and a plurality of high pressure needle nozzles comprises distributed in the longitudinal direction of the roller are arranged.
  • the high pressure sprayer includes at least one Needle jet spray tube with a plurality of in the direction of rotation high pressure needle nozzles arranged one behind the other, that on a traversing cart is arranged, the back and forth in the longitudinal direction of the roller is traversable.
  • the traversing trolley a large-scale cleaning effect can be achieved, so that even with relatively few high pressure needle nozzles the entire roller surface can be cleaned.
  • the needle spray tube is preferably provided with a Pressure of at least 40 bar operated to a to achieve a particularly intensive cleaning effect.
  • the high-pressure spray device comprises at least one Rotary nozzle device with a working pressure of at least 50 bar, preferably with a Working pressure of about 100 to 250 bar, is operated.
  • At least one rotary nozzle device from a suction cup open to the roller surface enclosed, which is subjected to a negative pressure is.
  • the suction cup is on the roller surface open side expediently the shape of the Adjusted roller surface and preferably by an elastic covering or a brush edge sealed against this.
  • the rotary nozzle device an axis of rotation on that compared to the surface normal of the roll surface is inclined.
  • the rotary nozzle device can a nozzle head with at least have a cleaning nozzle that is against the axis of rotation the rotary nozzle device is inclined.
  • the rotary nozzle device has a nozzle head with at least one nozzle whose nozzle diameter 0.1 mm to 0.8 mm, preferably 0.2 mm to 0.4 mm is.
  • a further embodiment of the invention is a plurality of rotary nozzle devices the roll surface across the entire roll width distributed.
  • the at least a rotating nozzle device on a traversing trolley arranged in the longitudinal direction of the Roller is traversable back and forth.
  • This measure has the advantage that additional superimposition with the speed component of the traversing carriage moving back and forth a further intensification of Cleaning effect is achieved. Furthermore are fewer rotating nozzle devices required to to clean the entire roller surface. To this In addition, the consumption of cleaning fluid be restricted.
  • the flushing device arranged behind the high-pressure spray device in the direction of rotation of the roller ensures that of the High pressure sprayer, which either as Needle spray pipe or as a rotating nozzle device detached impurities can be suspended and lighter from the roller surface can be removed.
  • This flushing device is expediently used as Flat jet spray tube, which is parallel to Roll surface extends in the longitudinal direction of the roller.
  • a roller 1 is shown with a Cleaning device 2 according to the prior art Is provided.
  • the roller 1 can in particular as Ceramic or granite roller be formed, the one particularly susceptible to incrustation e.g. by Has calcium carbonate.
  • the cleaning device 2 comprises a scraper bar 5, on which a spray device 6 for Spraying the roller 1 between one in the direction of rotation 7 of the roller 1 over the entire width of the roller extending scraper 3 and a second one Injection device 6 downstream in the direction of rotation 7 Scraper 4 is arranged, which is also on the extends across the entire width of the roller. Because of that Spray device 6 sprayed onto the roller surface Water moistens the roller surface, which loosens the dirt particles and partially removed from the subsequent scraper 4 become.
  • FIG. 2 is a press section of a paper machine, which is shown schematically, overall with number 10.
  • Press section 10 On the central roller 24 Press section 10 is a cleaning device according to the invention provided the total with the Number 40 is designated.
  • a paper web 12 arrives from an upstream not shown screen section on one over different Deflection rollers, of which only one with 29 shown, fed felt 28 to a first press nip 14 which is from a bottom Shoe press roll 18 and an upper suction roll 20 is formed. Through the press nip 14 is also a lower press felt 27 guided over deflection rollers 25, 26 rotates.
  • the paper web 12 is on the smooth central roller 24 passed that as a ceramic roller can be carried out and the one above arranged shoe press roll 22 a second press nip 16 forms.
  • a second press nip 16 forms.
  • Through the second press nip 16 is also an upper felt 32 over two deflecting rollers 30, 31 guided.
  • Cleaning device 40 is provided.
  • the cleaning device 40 comprises a first one Scraper 42, which is held on a scraper bar 45 is positioned at an angle to the roller surface and over the entire width of the roller 24 extends.
  • Parallel to the scraper 42 is in the direction of rotation 23 of the roller 24 is a needle jet spray pipe 46 provided that is also on the extends over the entire roll width and a plurality of Needle nozzles includes, as will be shown below with Fig. 3 is explained.
  • the needle spray tube is included a pressure of at least 10 bar, preferably with a pressure of more than 40 bar, operated and enabled intense thanks to the numerous needle nozzles Cleaning the roller 24.
  • the needle spray tube 46 is further downstream of the roller 24 in the direction of rotation 23 a flushing device through a flat spray wand 48 is formed, which is also parallel to Surface of the roller 24 over the entire width of the roller
  • the flat jet spray tube 48 extends with a significantly higher throughput of cleaning fluid operated as via the needle spray tube 46 exits.
  • a suspension is caused by the flat jet spray tube 48 the one previously through the needle spray tube 46 loosened dirt particles reached, so that this then by a subordinate second Scraper 44 slightly from the surface of roller 24 can be removed.
  • the second Scraper 44 which is also inclined against the roller surface is turned on, a dry roller surface ensured and thus the formation of Prevents wet streaks on the paper web 12.
  • the needle jet spray tube 46 comprises a plurality of needle nozzles 50, preferably somewhat obliquely against the direction of rotation 23 against the Roll surface are set.
  • the flat spray wand 48 includes a plurality of flat jet nozzles 52, through the cleaning liquid on the Roll surface is rinsed.
  • the needle spray tube 46 is connected via a line 47 with cleaning fluid at a pressure of at least 10 bar, preferably of more than 40 bar, while the flat jet spray pipe 48 only with a little pressure, but with a much larger one Flow is operated.
  • Water is usually used as the cleaning liquid used, where appropriate in particular cleaning liquid supplied via the needle jet spray tube 46 still improving the cleaning effect Additives can be added.
  • the cleaning device 70 in turn comprises a Needle jet spray pipe 76, which is between one in the direction of rotation 23 upstream first scraper 72 and a downstream scraper 74 is arranged.
  • the needle spray tube 76 in contrast to that previously shown in FIGS. 2 and 3 embodiment is the needle spray tube 76 but not parallel to the roll surface arranged, but extends in the direction of rotation 23 the roller 24 over a curved area in parallel to the roller surface.
  • the needle spray tube 76 in a direction transverse to the direction of rotation 23 of the roller 24 on a traversing carriage 71 arranged movably.
  • the traversing carriage 71 is thereby on cross members 77 parallel to the roll surface guided and is by a traversing motor, not shown driven at a predeterminable speed, being the traversing speed usually in a range of about 0.3 m each Minute.
  • FIG. 5 Another embodiment of the invention will described with reference to FIG. 5.
  • the high pressure sprayer not through the needle nozzles a needle spray tube but by at least a rotary nozzle device is formed.
  • the cleaning device designated overall by the number 80 includes a total in the case shown designated with the number 86
  • Rotary nozzle device with a suction cup 91 is combined and transversely on a traversing carriage 81 to the roll surface across the entire roll width is reciprocable and to which there is a flat spray nozzle 88 connects that parallel to the roller surface runs over the entire width of the roller.
  • Scraper 82 provided on a scraper beam 83 is held and obliquely against the roller surface is employed.
  • a second scraper 84 attached to a scraper beam 85 is held and also slightly counter the direction of rotation 23 set against the roller surface is.
  • the rotary nozzle device 86 is a High pressure line with a water pressure in the area between about 50 and 1,000 bar, preferably in Range from about 100 to 250 bar, supplied and owned a nozzle head 96 that is tangential across one or more outflowing propelling nozzles in a rotational movement in the range of about 2,000 to 3,000 Revolutions per minute.
  • the nozzle head 96 has one or more cleaning nozzles, through which the roller surface with a cleaning medium is applied.
  • the interior of the suction cup 91 is fluid connected to a suction line 93 and forms one the suction space associated with the rotary nozzle device 86 97.
  • the suction cup 91 is on the roller surface open side of the surface of the roller 24 adapted and on their edges by a brush edge 95 or by an elastic sheath sealed against the surface of the roller 24.
  • the rotary nozzle device 86 is with their Rotation axis 99 slightly oblique against the direction of rotation 23 compared to the surface normal on the Roll surface turned on.
  • By quickly heading towards of the arrow 90 rotating nozzle head 96 High pressure cleaning jets in different angles towards the surface of roller 24, as indicated by arrows 92.
  • the axis of rotation 99 is in connection with the back and forth traversing movement of the traversing carriage 81 a particularly strong cleaning effect reached.
  • the cleaning nozzles provided on the nozzle head 96 100 obliquely with respect to the axis of rotation 99 are inclined, as can be seen from FIGS. 6 and 7 becomes.
  • the structure of the nozzle head 96 will now explained in more detail with reference to FIGS. 6 and 7.
  • the nozzle head 96 is rotatable on a by means of a bearing 98 Flange 105 held. Inside the flange 105 is a fixed nozzle feed line 101 is provided, which in a pressure chamber 106 opens, the walls 103 against the inside of a cylindrical component 102 sealing, but slidable.
  • the cylindrical Component 102 has four at an angle of 90 ° to one another arranged openings.
  • Nozzle feed lines 104 connected which are radial extend outward and around in its end portion are preferably bent by 90 °, as can be seen in FIG. 7 is.
  • the nozzle feed lines 104 finally end in inclined cleaning nozzles 100, as shown in FIG.
  • the nozzle head 96 also with an or several pivoted, one oscillation movement performing individual nozzles, the during the traversing movement of the nozzle head 96 paint over a band-shaped area of the roller 24.

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  • Paper (AREA)
  • Cleaning In General (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Claims (14)

  1. Cylindre (24) pour machine de fabrication de papier, doté d'un dispositif de nettoyage pour le nettoyage de la surface du cylindre, le dispositif de nettoyage présentant un dispositif de projection pour projeter un agent liquide de nettoyage sur le cylindre (24) et un dispositif pour retirer l'agent de nettoyage de la surface du cylindre, le dispositif de projection étant configuré comme dispositif de projection (46, 86) à haute pression présentant une pression de travail d'au moins 10 bars, de préférence d'au moins 40 bars, et le dispositif pour retirer l'agent de nettoyage comprenant au moins un racleur (44, 84) disposé en aval du dispositif de projection (46, 86) à haute pression dans le sens de rotation (23) du cylindre (24), caractérisé en ce que en aval du dispositif de projection (46, 86) à haute pression dans le sens de rotation (23) du cylindre (24) et en amont du racleur (44, 84) au moins présent, est disposé un dispositif de rinçage (48, 88) qui est configuré comme dispositif de projection pour projeter un agent liquide de nettoyage sur le cylindre et qui est utilisé à un débit plus élevé d'agent de nettoyage que le dispositif de projection (46, 86) à haute pression, pour rincer la surface du cylindre.
  2. Cylindre pour machine de fabrication de papier selon la revendication 1, caractérisé en ce que le dispositif de projection à haute pression comprend au moins un tube de projection (46) à jets en aiguille qui est disposé parallèlement à l'axe longitudinal du cylindre (24) et qui comprend une pluralité de gicleurs en aiguille (50) à haute pression qui sont répartis dans le sens de la longueur du cylindre (24).
  3. Cylindre pour machine de fabrication de papier selon la revendication 1, caractérisé en ce que le dispositif de projection à haute pression comprend au moins un tube de projection à jets en aiguille présentant une pluralité de gicleurs en aiguille à haute pression disposés l'un derrière l'autre dans le sens de rotation (23) du cylindre (24), et qui est disposé sur un chariot de traversée qui peut être déplacé en va-et-vient dans le sens de la longueur du cylindre (24).
  4. Cylindre pour machine de fabrication de papier selon la revendication 1, caractérisé en ce que le dispositif de projection à haute pression comprend au moins un dispositif (86) à gicleur rotatif dont la pression de travail est d'au moins 50 bars, la pression de travail étant de préférence comprise entre environ 100 et 250 bars.
  5. Cylindre pour machine de fabrication de papier selon la revendication 4, caractérisé en ce qu'au moins un dispositif (86) à gicleur rotatif est entouré par une cloche aspirante (91) ouverte en direction de la surface du cylindre et sur laquelle une dépression est appliquée.
  6. Cylindre pour machine de fabrication de papier selon la revendication 5, caractérisé en ce que la cloche aspirante (91) présente une enveloppe élastique ou une bordure (95) en brosse.
  7. Cylindre pour machine de fabrication de papier selon la revendication 4, 5 ou 6, caractérisé en ce que le dispositif (86) à gicleur rotatif présente un axe de rotation (99) qui est incliné par rapport à la normale à la surface du cylindre.
  8. Cylindre pour machine de fabrication de papier selon l'une ou plusieurs des revendications 4 à 7, caractérisé en ce que le dispositif (86) à gicleur rotatif présente une tête de gicleur (96) dotée d'au moins un gicleur de nettoyage (100) qui est incliné par rapport à l'axe de rotation (99) du dispositif (86) à gicleur rotatif.
  9. Cylindre pour machine de fabrication de papier selon l'une ou plusieurs des revendications 4 à 8, caractérisé en ce que le dispositif (86) à gicleur rotatif comprend une tête de gicleur (96) dotée d'au moins un gicleur de nettoyage (100) dont le diamètre est compris entre 0,1 mm et 0,8 mm, de préférence entre 0,2 mm et 0,4 mm.
  10. Cylindre pour machine de fabrication de papier selon l'une ou plusieurs des revendications 4 à 9, caractérisé en ce qu'une pluralité de dispositifs (86) à gicleur rotatif est répartie devant la surface du cylindre, le long de la largeur du cylindre.
  11. Cylindre pour machine de fabrication de papier selon l'une ou plusieurs des revendications 4 à 9, caractérisé en ce qu'au moins un dispositif (86) à gicleur rotatif est disposé sur un chariot de traversée (81) qui peut être déplacé en va-et-vient dans le sens de la longueur du cylindre (24).
  12. Cylindre pour machine de fabrication de papier selon l'une des revendications précédentes, caractérisé en ce que le dispositif de rinçage est configuré comme tube (48, 88) de projection d'un jet plat qui s'étend parallèlement à la surface du cylindre dans le sens de la longueur du cylindre (24).
  13. Cylindre pour machine de fabrication de papier selon l'une ou plusieurs des revendications précédentes, caractérisé en ce qu'au moins un racleur (42, 82) est disposé en amont du dispositif de projection (46, 86) à haute pression dans le sens de rotation (23) du cylindre (24).
  14. Cylindre pour machine de fabrication de papier selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que le cylindre (24) est un cylindre en céramique ou en granit.
EP97106506A 1996-07-11 1997-04-19 Dispositif de nettoyage Expired - Lifetime EP0818574B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19627973 1996-07-11
DE19627973A DE19627973A1 (de) 1996-07-11 1996-07-11 Reinigungsvorrichtung

Publications (3)

Publication Number Publication Date
EP0818574A2 EP0818574A2 (fr) 1998-01-14
EP0818574A3 EP0818574A3 (fr) 1999-01-20
EP0818574B1 true EP0818574B1 (fr) 2003-03-19

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Application Number Title Priority Date Filing Date
EP97106506A Expired - Lifetime EP0818574B1 (fr) 1996-07-11 1997-04-19 Dispositif de nettoyage

Country Status (4)

Country Link
US (1) US5964960A (fr)
EP (1) EP0818574B1 (fr)
CA (1) CA2208288A1 (fr)
DE (2) DE19627973A1 (fr)

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ATE209271T1 (de) * 1995-02-24 2001-12-15 Voith Paper Patent Gmbh Reinigungsvorrichtung
DE29517859U1 (de) * 1995-02-24 1996-01-18 Voith Sulzer Papiermasch Gmbh Reinigungsvorrichtung

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CA2208288A1 (fr) 1998-01-11
EP0818574A2 (fr) 1998-01-14
DE59709542D1 (de) 2003-04-24
EP0818574A3 (fr) 1999-01-20
DE19627973A1 (de) 1998-01-15
US5964960A (en) 1999-10-12

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