EP0907791B1 - Dispositif de nettoyage destine a une toile d'egouttage dans une section humide ou seche ou un feutre humide dans une section de presse de machine a papier - Google Patents

Dispositif de nettoyage destine a une toile d'egouttage dans une section humide ou seche ou un feutre humide dans une section de presse de machine a papier Download PDF

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Publication number
EP0907791B1
EP0907791B1 EP97918431A EP97918431A EP0907791B1 EP 0907791 B1 EP0907791 B1 EP 0907791B1 EP 97918431 A EP97918431 A EP 97918431A EP 97918431 A EP97918431 A EP 97918431A EP 0907791 B1 EP0907791 B1 EP 0907791B1
Authority
EP
European Patent Office
Prior art keywords
cleaning device
felt
spray nozzle
screen
cleaning
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
EP97918431A
Other languages
German (de)
English (en)
Other versions
EP0907791A1 (fr
Inventor
Mathieu Jozef Maria Robberts
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.)
Robo Paper BV
Original Assignee
ROBO PAPER BV
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 ROBO PAPER BV filed Critical ROBO PAPER BV
Publication of EP0907791A1 publication Critical patent/EP0907791A1/fr
Application granted granted Critical
Publication of EP0907791B1 publication Critical patent/EP0907791B1/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
    • 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

Definitions

  • the invention relates to a cleaning device for cleaning a dewatering screen in a wet or dry section or a wet felt in a press section of a paper making machine, said device comprising at least one rotatable spray nozzle, which is coupled to an air and/or liquid supply means, and a motor for rotating said spray nozzle.
  • a dewatering screen and/or a wet felt is contaminated with paper residue, size-residue and other contaminants.
  • the dewatering screens and/or wet felts need to be cleaned by means of a cleaning device.
  • a cleaning device of this kind is inter alia known from German Gebrauchsmuster DE-U-29517859.
  • the cleaning device shown and described therein includes a rotatable spray nozzle which is driven by the (cleaning) water.
  • the cleaning device furthermore contains means for supplying air, which air is blown into a hood, in which the rotatable spray nozzle is disposed, in order to provide exhaustion of the detached dirt and/or the mist or the residual water into an discharge room.
  • Another disadvantage of this known device is the fact that the exhaustion of the detached dirt and/or the mist or the residual water does not function adequately, because the matter to be exhausted is carried from under the hood along with the screen or the felt.
  • a cleaning device is characterized in that said said motor is an electro-motor and includes a hollow shaft, which forms part of the rotatable part of the motor, wherein the spray nozzle is directly mounted to one end of the hollow shaft and wherein the other end of the hollow shaft is coupled to the air and/or liquid supply means.
  • Another embodiment of a cleaning device according to the invention is characterized in that said cleaning device furthermore includes at least two air jet nozzles, which jet nozzles are disposed on either side of the rotatable spray nozzle.
  • FIG. 1 Another embodiment of a cleaning device according to the invention is characterized in that said cleaning device includes a row of air jet nozzles extending transversely to said screen or said felt, which air jet nozzles are positioned in the direction of movement of said screen or said felt with respect to said rotatable spray nozzle, and which comprise outlet openings, which blow in operative condition, in a direction opposed to the direction of movement of said screen or said felt.
  • the invention relates to a cleaning device wherein said device comprises an exhausting hood, which hood terminates near or in a discharge drain (save-all) disposed at some distance from said screen and/or said felt and parallel to the transverse direction thereof.
  • Said cleaning device is according to the invention characterized in that said exhausting hood comprises at least one plate-shaped end piece, which end piece is in contact, at least with its free end, with the inner side of the discharge drain (save-all) during operation.
  • the free end of the plate-shaped end piece is configured to have a shape which substantially corresponds with the shape of the inside of the discharge drain (save-all). This leads to a considerably improved displacement and removal of the contaminations to the ends of the discharge drain (save-all), whilst preventing the discharge drain (save-all) from becoming clogged.
  • the cleaning device according to the invention is characterized in that the plate-shaped end piece is made of a flexible material, for example a rubber or a plastic. This material can be readily processed at low cost, whilst at the same time providing a satisfactory cleaning of the discharge drain (save-all).
  • Another embodiment of the cleaning device according to the invention is characterized in that the outlet opening of the exhausiting hood is in the form of a venturi tube. This provides a considerably improved discharge of the contaminations from the exhausiting hood, so that the occurrence of clogging, failure and/or unnecessary standstill of the cleaning device is considerably reduced.
  • Figure 1 shows an embodiment of a cleaning device 1 including a rotatable spray nozzle 3.
  • Said spray nozzle is driven by a motor 5 in order to obtain the required/desired rotational speed.
  • Spray nozzle 3 is coupled to a hollow shaft 51, which forms part of the rotatable part of the motor.
  • the rotational speed can be adjusted thereby in dependence on e.g. the extent of contamination, the type of screen or felt, the spray nozzle used, the amount and/or the pressure of the liquid (e.g. water) and the air pressure used.
  • the cleaning device is placed near a screen or felt 7, which moves over a roll 9.
  • the cleaning device furthermore includes an exhausting hood 11, which is coupled to a fan 21.
  • a cleaning device furthermore includes supply means 13, which are on the one hand coupled to a liquid supply pipe 131 and an air supply pipe 132, and which on the other hand supply the liquid to spray nozzle 3 via an outlet 15.
  • Supply means 13 furthermore include an outlet 17, which is coupled to air supply means 19.
  • Said air supply means 19 include a portion 193, which blows air along the liquid sprayed onto the screen or the felt by the spray nozzle.
  • Air supply means 19 furthermore include a portion 191, which blows air in the form of a so-called air knife after the screen or the felt has passed spray nozzle 3. The supplied air and the detached dirt, residual water etc. are exhausted via a fan 21.
  • FIG 2 is a more detailed view of a part of an embodiment of a cleaning device according to the invention. Those elements that correspond with the elements shown in Figure 1 are indicated by the same reference numerals.
  • the rotatable spray nozzle 3 covers a spraying area 31. Beside this spraying area air jet nozzles 4 forming part of portion 193 of air supply means 19 are provided, which air jet nozzles assist in soaking off/detaching contaminations from the screen or felt 7. Said air jets 41 furthermore cause the dirt to be moved from the screen or felt 7 into the exhausting hood 11 disposed thereabove.
  • Figure 3 is a more detailed view of a part of an embodiment of a cleaning device according to the invention.
  • portion 191 of air supply means 19 is in the form of a row of air jet nozzles, which blow air jets 195 at an angle towards screen or felt 7, in a direction opposed to the direction of movement of said screen or said felt.
  • This provides a so-called air knife, by means of which the detached dirt and/or the mist or the residual water is removed from said screen or said felt.
  • FIG 4 shows another embodiment of the cleaning device according to the invention.
  • the parts of the cleaning device of this embodiment are indicated by reference numerals that correspond with those of the embodiment of the cleaning device according to Figure 1.
  • the contaminated screen or felt 7 is cleaned by means of rotatable spray nozzle 3, after which the detached contaminations are transported through exhausting hood 11 in the direction indicated by the arrows, possibly along with the cleaning liquid being used, by means of portions 191 and 193 of air supply means 19.
  • exhausting hood 11 terminates near or in a discharge drain 60 (save-all), which discharge drain 60 (save-all) is disposed at some distance from the screen or felt 7 and parallel to the transverse direction thereof.
  • the exhausting hood 11 is according to the invention provided with at least one end piece 61, said end piece 61 with its free end piece 61a in the operative position being in contact, at least substantially so, with the inner side 60a of discharge drain 60 (save-all).
  • End piece 61 is preferably plate-shaped, so that the outflow of contaminations from exhausting hood 11 in the direction indicated by the arrows is hardly obstructed, if at all.
  • cleaning device 1 Whilst screen or felt 7 is being cleaned in the operative condition, cleaning device 1 is moved to and from along screen or felt 7, in the transverse direction thereof, in a known manner.
  • the soaked-off contaminations are deposited into discharge drain 60 (save-all) via exhausting hood 11, in the direction indicated by the arrows, from which location they are moved towards the two ends of said discharge drain 60 (save-all) by means of end piece 61 during the movement of cleaning device 1.
  • the soaked-off contaminations are collected only at the ends of discharge drain 60 (save-all), and said discharge drain (save-all) will not become clogged in the working area of cleaning device 1, i.e. substantially in the centre of discharge drain 60 (save-all).
  • the free end 61a of end piece 61 may have a shape which substantially corresponds with the shape of the inner side 60a of discharge drain 60 (save-all). This leads to a considerably improved displacement and removal of the contaminations to the ends of discharge drain 60 (save-all), thus preventing the discharge drain (save-all) from becoming clogged.
  • the plate-shaped end piece may be made of a flexible material, for example a rubber or a plastic, which exhibits sufficient rigidity for moving the contaminations.
  • the outflow opening of exhausting hood 11 of Figure 1 is provided with a fan 21, the exhaustion of contaminations from exhausting hood 11 may also take place in a different manner.
  • the outflow opening of exhausting hood 11 is made in the form of a venturi tube 62.
  • venturi tube 62 the pressure generated within exhausting hood 11 is converted into velocity within said venturi tube, resulting in an improved exhaustion of the contaminations to discharge drain 60 (save-all), as indicated by the arrows. In this manner the risk of clogging and failure of the cleaning device is strongly reduced.
  • the cleaning liquid e.g. water

Claims (8)

  1. Système de nettoyage destiné au nettoyage d'un crible d'égouttage (7) dans une section humide ou sèche ou un feutre humide (7) d'une section de presses d'une machine à papier, ledit système (1) comprenant au moins un pulvérisateur rotatif (3), lequel est couplé à un moyen d'alimentation en air et/ou en liquide (13), et un moteur (5) pour faire tourner ledit pulvérisateur (3), caractérisé en ce que ledit moteur (5) est un moteur électrique et comprend un axe creux (51), lequel fait partie de la partie rotative du moteur, dans lequel le pulvérisateur (3) est directement monté à une extrémité de l'axe creux (51) et dans lequel l'autre extrémité de l'axe creux (51) est couplée au moyen d'alimentation en air et/ou en liquide (13)
  2. Système de nettoyage (1) selon la revendication 1, caractérisé en ce que ledit système de nettoyage comprend par ailleurs au moins deux buses d'air (191, 193), ces buses d'air étant disposées de chaque côté dudit pulvérisateur rotatif (3)
  3. Système de nettoyage (1) selon la revendication 1 ou 2, caractérisé en ce que ledit système de nettoyage comprend une rangée de buses d'air (191) qui s'étend transversalement par rapport audit crible ou audit feutre (7), ces buses d'air étant positionnées en aval dudit pulvérisateur rotatif (3) par rapport au sens du mouvement dudit crible ou dudit feutre (7) et qui comprennent des ouvertures de sortie qui soufflent en cours de fonctionnement dans un sens contraire au sens du mouvement dudit crible ou dudit feutre (7)
  4. Système de nettoyage selon l'une quelconque des revendications précédentes, dans lequel ledit système comprend une hotte aspirante (11) de sorte que le pulvérisateur (3) est disposé dans la hotte aspirante, cette hotte aspirante pouvant se déplacer le long du crible ou du feutre (7) dans son sens transversal et se terminant près ou dans la canalisation d'évacuation (60) disposée à une certaine distance dudit crible et/ou dudit feutre (7) et parallèle à son sens transversal, caractérisé en ce que ladite hotte aspirante (11) comprend au moins un embout en forme de plaque (61), cet embout étant en contact, au moins au niveau de son extrémité libre, avec la face interne (60a) de la canalisation d'évacuation (60) lors de son fonctionnement.
  5. Système de nettoyage selon la revendication 4, caractérisé en ce que l'extrémité libre (61a) de l'embout en forme de plaque (61) est configurée pour avoir une forme qui correspond sensiblement à la forme de l'intérieur de la canalisation d'évacuation (60a)
  6. Système de nettoyage selon la revendication 4 ou 5, caractérisé en ce que ledit embout en forme de plaque (61) est en matière souple.
  7. Système de nettoyage selon la revendication 4, 5 ou 6, caractérisé en ce que l'embout en forme de plaque (61) est en caoutchouc ou en plastique.
  8. Système de nettoyage selon l'une quelconque des revendications précédentes, dans lequel ledit système comprend une hotte aspirante, de sorte que le pulvérisateur est disposé à l'intérieur de la hotte aspirante, caractérisé en ce que l'ouverture de sortie de ladite hotte aspirante (11) a la forme d'un tube de Venturi (62).
EP97918431A 1996-05-09 1997-05-12 Dispositif de nettoyage destine a une toile d'egouttage dans une section humide ou seche ou un feutre humide dans une section de presse de machine a papier Expired - Lifetime EP0907791B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NL1003070A NL1003070C2 (nl) 1996-05-09 1996-05-09 Reinigingsinrichting voor het reinigen van een ontwateringszeef in een nat- of droogpartij of een natvilt in een perspartij van een papier- vervaardigingsmachine.
NL1003070 1996-05-09
PCT/NL1997/000263 WO1997042373A1 (fr) 1996-05-09 1997-05-12 Dispositif de nettoyage destine a une toile d'egouttage dans une section humide ou seche ou un feutre humide dans une section de presse de machine a papier

Publications (2)

Publication Number Publication Date
EP0907791A1 EP0907791A1 (fr) 1999-04-14
EP0907791B1 true EP0907791B1 (fr) 2003-04-16

Family

ID=19762826

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97918431A Expired - Lifetime EP0907791B1 (fr) 1996-05-09 1997-05-12 Dispositif de nettoyage destine a une toile d'egouttage dans une section humide ou seche ou un feutre humide dans une section de presse de machine a papier

Country Status (7)

Country Link
EP (1) EP0907791B1 (fr)
AT (1) ATE237714T1 (fr)
AU (1) AU2653697A (fr)
BR (1) BR9708943A (fr)
DE (1) DE69720993D1 (fr)
NL (1) NL1003070C2 (fr)
WO (1) WO1997042373A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005011690A1 (de) * 2004-10-22 2006-04-27 Robo Paper B.V. Vorrichtung und Verfahren zum Reinigen einer Materialbahn sowie Verfahren zum Verringern oder Vermeiden eines Ausbreitens eines Sprühnebels

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6360758B1 (en) * 1999-09-10 2002-03-26 Metso Paper, Inc. Cleaning device in paper machines, board machines or other similar machines for cleaning a fabric, such as wire or felt
AT411907B (de) * 2001-11-22 2004-07-26 Bartelmuss Klaus Ing Vorrichtung zur reinigung des mindestens einen siebbandes in einer anlage zur papiererzeugung
US7811417B2 (en) * 2005-12-30 2010-10-12 Honeywell Asca, Inc. Cross-machine direction actuators for machine clothing
JP6787407B2 (ja) * 2016-11-29 2020-11-18 セイコーエプソン株式会社 シート製造装置
CN107254796B (zh) * 2017-08-09 2024-02-02 玖龙纸业（太仓）有限公司 一种干网清洗装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB683347A (en) * 1950-08-10 1952-11-26 Staaf Gustaf Adolf Improvements in cleansing arrangements for filtering or straining cloths
US5129956A (en) * 1989-10-06 1992-07-14 Digital Equipment Corporation Method and apparatus for the aqueous cleaning of populated printed circuit boards
DE9208909U1 (fr) * 1992-07-03 1992-09-24 J.M. Voith Gmbh, 7920 Heidenheim, De
SE500772C2 (sv) * 1992-11-25 1994-08-29 Staffan Sjoeberg Anordning för rengöring av föremål i rörelse
EP0731211B1 (fr) * 1995-02-24 2002-06-05 Voith Paper Patent GmbH Dispositif à jet

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005011690A1 (de) * 2004-10-22 2006-04-27 Robo Paper B.V. Vorrichtung und Verfahren zum Reinigen einer Materialbahn sowie Verfahren zum Verringern oder Vermeiden eines Ausbreitens eines Sprühnebels

Also Published As

Publication number Publication date
DE69720993D1 (de) 2003-05-22
EP0907791A1 (fr) 1999-04-14
WO1997042373A1 (fr) 1997-11-13
ATE237714T1 (de) 2003-05-15
NL1003070C2 (nl) 1997-11-18
BR9708943A (pt) 2000-01-04
AU2653697A (en) 1997-11-26

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