EP0887460B1 - Procédé et appareil pour nettoyer une bande de transport - Google Patents

Procédé et appareil pour nettoyer une bande de transport Download PDF

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Publication number
EP0887460B1
EP0887460B1 EP98108953A EP98108953A EP0887460B1 EP 0887460 B1 EP0887460 B1 EP 0887460B1 EP 98108953 A EP98108953 A EP 98108953A EP 98108953 A EP98108953 A EP 98108953A EP 0887460 B1 EP0887460 B1 EP 0887460B1
Authority
EP
European Patent Office
Prior art keywords
cleaning
transport belt
intensity
cleaned
conveyor belt
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
EP98108953A
Other languages
German (de)
English (en)
Other versions
EP0887460A1 (fr
EP0887460B2 (fr
Inventor
Karlheinz Straub
Markus Oechsle
Gerhard Kotitschke
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
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Application filed by Voith Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Priority to EP02002843A priority Critical patent/EP1219747B2/fr
Publication of EP0887460A1 publication Critical patent/EP0887460A1/fr
Application granted granted Critical
Publication of EP0887460B1 publication Critical patent/EP0887460B1/fr
Publication of EP0887460B2 publication Critical patent/EP0887460B2/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
    • 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

Definitions

  • the invention relates to a method for cleaning a conveyor belt of a machine for manufacturing a material web, especially paper or Cardboard web, according to the preamble of claim 1 and a device for cleaning a conveyor belt a machine for producing a material web, in particular paper or cardboard web, according to the preamble of claim 9.
  • conveyor belts In machines for the production of a material web numerous conveyor belts, especially fabric belts, used. These are used during the contaminated during operation of the machine, for example through fibers of the material web, adhesives or other additives that the Add meshes and pores to the conveyor belts.
  • a cleaning device Around ensure a trouble-free production process to be able to use the conveyor belts cleaned with a cleaning device. They are cleaning devices known, the one with a pressurized cleaning medium Grasp nozzle. The nozzle is transverse to the running direction of the conveyor belt relocatable and that brings Cleaning medium evenly on the conveyor belt surface on.
  • cleaning devices which is a cross to the direction of the conveyor belt extending nozzle bar include, attached to the multiple nozzles are, by means of which a cleaning medium on the Conveyor belt can be applied. It has shown that the conveyor belts - transverse to the direction of travel seen - unevenly contaminated be, that is, the conveyor belt can for example particularly strong in the peripheral areas be dirty while in the middle of the conveyor belt only a little pollution can.
  • the uniform cleaning effect of the known Cleaning devices can be used in such Not always a satisfactory cleaning result provide what leads to disruptions in the production process and especially to a quality # loss of the finished product can result (see EP-A-383486).
  • a method is proposed that the features mentioned in claim 1 having. It is characterized in that the Conveyor belt across the width with different Intensity is cleaned.
  • the conveyor belt will during a cleaning process - transverse to the direction of travel of the conveyor belt - at different Places with a defined, preferably the degree of pollution of the respective Conveyor belt section adjusted intensity cleaned.
  • the edges of the conveyor belt with a greater intensity than the one in between Conveyor belt section or vice versa By cleaning the conveyor belt with different intensity can be a special good cleaning result can be achieved so that a disruption of the production process by a not Sufficiently cleaned conveyor belt can be practically excluded. Farther can reduce the consumption of the cleaning medium become.
  • An embodiment of the method is preferred which is characterized in that the conveyor belt with a pressurized gaseous or liquid cleaning medium is cleaned and that the cleaning intensity by adjusting the pressure of the cleaning medium is affected.
  • the greater the pressure of the cleaning medium the higher the cleaning effect can be and vice versa.
  • a low pressure of the cleaning medium becomes the conveyor belt of a relatively small load subject to what is particularly sensitive Conveyor belts extend their lifespan.
  • An embodiment of the Procedure in which the cleaning intensity by a specific specification of the duration influences is in a defined area of the conveyor belt is cleaned.
  • the invention provides that the Cleaning intensity by adjusting the between two successive cleaning processes Time interval is influenced in which a and cleaned the same area of the conveyor belt becomes. The cleaning intensity gets higher, the longer the time of cleaning and / or the shorter the time interval between two cleaning processes is.
  • An embodiment of the Procedure which is characterized in that the Cleaning area of the conveyor belt with negative pressure is applied and that the pressure is dependent of the desired cleaning intensity is set. With increasing negative pressure can also particularly stubbornly adhering to the conveyor belt Dirt can be removed safely, so that a desired cleaning result is achieved. Especially advantageous when controlling the suction is that this means the vacuum requirement and thus the Deployment costs are reduced can.
  • one embodiment of the method preferred which is characterized in that on the conveyor belt area to be cleaned applied amount of cleaning medium set becomes.
  • the cleaning effect can be greater with amount of the applied to the conveyor belt Increase the cleaning medium.
  • the conveyor belt amount of liquid or gaseous used Cleaning medium for example depending the degree of contamination of the conveyor belt area to be cleaned, can be used for thorough cleaning required amount of cleaning medium reduced become.
  • the method according to one of the claims 1 to 7 can also be used to set the moisture profile of the conveyor belt can be used.
  • the conveyor belt is transverse to its direction of travel considered - in sections / areas different intensity can be cleaned affects the moisture content in the conveyor belt, preferably can be set.
  • This can do that Moisture profile of a material web after cleaning the conveyor belt supported by this is influenced and preferably also set become.
  • the setting of the moisture profile that is, the water content of the conveyor belt / material web - seen across its direction of travel- can, for example, according to a predetermined defined profile, taking the intensity adapted accordingly to the cleaning of the conveyor belt becomes.
  • the cleaning device comprises a nozzle device with at least a nozzle, by means of which the conveyor belt with a pressurized cleaning medium is.
  • the cleaning device draws is characterized in that the nozzle device is designed in this way is that the conveyor belt - over the Seen broad - with different intensity is cleaned. This can give a good cleaning result ensured and consumption at the same time for cleaning the conveyor belt cleaning medium used kept relatively small, preferably be minimized.
  • the cleaning device is provided that the Pressure of the cleaning medium depending on the desired cleaning intensity is adjustable.
  • an embodiment of the Cleaning device preferred, which is thereby distinguishes that the nozzle device transversely to Direction of travel of the conveyor belt is movably supported and that their traversing speed at Influence of cleaning intensity adjustable is.
  • the areas of the conveyor belt with of a relatively low intensity are, for example, faster from the nozzle device run over or happens than the areas that require more intensive cleaning be subjected.
  • an embodiment of the cleaning device suggested this distinguishes that the pressure of the cleaning medium adjustable by means of a control and / or regulation which is the speed of supplying the Nozzle device with the cleaning medium Pump controls.
  • the control for example a programmable logic controller (PLC) an automation of setting the Cleaning intensity of the conveyor belt respectively at least one conveyor belt area.
  • PLC programmable logic controller
  • An embodiment of the is also preferred Cleaning device, which is characterized by that a cooperating with the nozzle device, via a suction line with a suction device suction chamber in flow connection is provided and that the suction power of the Suction device depending on the desired Cleaning intensity is adjustable. Under suction is here in a defined Volume of air extracted from the cleaning area Roger that. Through this measure, the Operating costs of the cleaning device reduced become.
  • the device provides that the suction power by means of a - for example in the suction line provided- valve continuously adjustable is.
  • the device is briefly referred to below as a cleaning device 1 designated.
  • the cleaning device 1 can for any Conveyor belts for a machine for manufacturing a material web can be used, for example for sieve belts or felts Sieve or a press or dryer section a paper or board making machine.
  • Conveyor belts are too the sieves or felts addressed within one of the press and dryer sections upstream Formers are used. Purely exemplary it is assumed that these are conveyor belts a paper making machine.
  • the cleaning device 1 comprises a nozzle head 3 nozzle device 5.
  • the nozzle head 3 has at least one not shown Nozzle on a porous conveyor belt 7 with a liquid cleaning medium, for example Water, or a gaseous cleaning medium, for example steam.
  • a liquid cleaning medium for example Water
  • a gaseous cleaning medium for example steam.
  • the cleaning medium is a liquid acts under a pressure of 100 bar to Is 1000 bar.
  • connector 6 provided a pressure hose that can be connected to a pump for supplying the nozzle device 5 with the cleaning medium can be connected.
  • the nozzle head 3 designed to be rotatable about its longitudinal axis 9 and have a nozzle arrangement that comprises one or more propulsion nozzles from which the Cleaning medium tangential to the conveyor belt surface emerges and the creation of a rotational movement serve, also one or more cleaning nozzles, the conveyor belt with the cleaning medium apply.
  • the rotation of the nozzle head can also be done in other ways than by the Using propellant nozzles.
  • the nozzle device 5 is of a jacket-shaped Suction cup 11 completely surrounded.
  • the inside of the Suction cup 11 is connected to a suction line 13 and forms one associated with the nozzle device 5 Suction chamber 15.
  • the suction line 13 is attached to a traversing carriage 17 and stands with a vacuum source not shown in Flow connection.
  • the traversing carriage 17 is along a cross to the direction of the conveyor belt 7 extending - highly schematic shown-traverse 19 relocatable.
  • the traverse car 17 and the traverse 19 form a traversing unit 20th
  • the cleaning device 1 assigned to a deflection roller 21 in order which the conveyor belt 7 is guided around. Which over a portion of the peripheral surface of the deflection roller 21 extending suction cup 11 is in one Distance to the pulley 21 is arranged.
  • One of those Conveyor belt 7 facing end portion 23 of the suction cup 11 is the circular cylindrical peripheral shape the guide roller 21 adapted so that the gap between the suction cup 11 and the conveyor belt 7 in is essentially constant.
  • the distance between the Suction cup 11 and conveyor belt 7 is adjustable, which will be discussed in more detail.
  • the functioning of the cleaning device 1 is explained in more detail below.
  • the conveyor belt 7 guided over the deflection roller 21 is acted upon by the nozzle device 5 with pressurized cleaning liquid (nozzle jet 25). Coarse particles and dirt are released from the conveyor belt 7 and removed from the surface of the conveyor belt 7 by the suction bell 11. Because of the defined distance between the suction bell 11 and the conveyor belt 7, so-called false air is sucked in from the surroundings into the suction space 15, which entrains dirt and cleaning liquid. These are further discharged from the suction chamber 15 via the suction line 13. The flow formed by sucking in false air is indicated by arrows 27. By adjusting the distance between the suction cup 11 and the conveyor belt 7, the flow can be changed in a targeted manner.
  • the pressure of the Cleaning medium here the cleaning liquid, depending on the desired cleaning intensity can be set.
  • the setting of the Pressure of the cleaning liquid can, for example by means of a not shown in the figure Control / regulation take place, which is the delivery rate the supply of the nozzle device 5 with controls the cleaning liquid pump.
  • the effect of the jet is reduced by low pressure 25 and thus the cleaning intensity reduced.
  • the cleaning intensity is corresponding increases with increasing pressure.
  • the intensity of cleaning the conveyor belt 7 can also about varying the traversing speed the nozzle device 5, preferably be set. At a high Traversing speed is the dwell time of the Nozzle jet 25 in one and the same place of the Conveyor belt 7 compared to a lower traversing speed shortened, that is, at a high speed a lower cleaning effect than at a low speed. In another embodiment it is provided that to influence the cleaning intensity both the pressure of the cleaning fluid as well as the traversing speed can be varied.
  • Another way of cleaning the Setting cleaning device 1 consists in to vary the suction power of the suction device, for example, in that in the suction line 13 a valve is introduced by means of which the volume extracted from the suction space 15 is adjustable is. That not shown in the figure Valve can be used as a proportional valve, for example be trained, which is infinitely adjustable. To increase the cleaning effect, you can also additional cleaning nozzles are provided which can be activated and deactivated separately are, so that one or more of the additional nozzles before or during a cleaning process be switched on / off can / can.
  • the method according to the invention can also be used Setting the moisture profile of the conveyor belt 7 be used.
  • the pressure of the cleaning medium, the duration of the cleaning, the Duration of between two successive cleaning processes lying time interval, the connection further cleaning nozzles and / or the Control of the suction power of the suction device it is possible to have an exact water content in the conveyor belt 7 across the width. This can have a direct impact on the Moisture profile of a material web are taken, after cleaning the conveyor belt 7 from this is supported. But it is also possible with the help of suitable facilities set and monitored by means of cross profile measuring devices To influence the moisture profile of the material web.
  • Setting the moisture profile of a conveyor belt for example a press felt Press section, can be manual or automatic, preferably following a given profile Control / regulation of the cleaning intensity take place.
  • the intensity with which the conveyor belt 7 in certain Areas cleaned is preferred depending on the level of pollution. It has shown that often the edges of the conveyor belt 7 become more dirty than the one in between Conveyor belt section, so that with need to be cleaned to a greater intensity. This can be done with one of the measures described above will be realized.

Landscapes

  • Cleaning By Liquid Or Steam (AREA)
  • Cleaning In General (AREA)
  • Belt Conveyors (AREA)
  • Structure Of Belt Conveyors (AREA)

Claims (13)

  1. Procédé pour nettoyer une bande de transport d'une machine de fabrication d'une nappe de matériau, en particulier une nappe de papier ou de carton, la bande de transport étant nettoyée sur toute sa largeur avec une intensité différente,
    caractérisé en ce que
    l'intensité de nettoyage est influencée par l'indication préalable d'une durée déterminée durant laquelle une zone définie de la bande de transport est nettoyée.
  2. Procédé pour nettoyer une bande de transport d'une machine de fabrication d'une nappe de matériau, en particulier une nappe de papier ou de carton, la bande de transport étant nettoyée sur toute sa largeur avec une intensité différente, en particulier selon la revendication 1, caractérisé en ce que
    l'intensité de nettoyage est influencée par le réglage de l'intervalle de temps entre deux opérations de nettoyage successives, durant lequel une même zone de la bande de transport est nettoyée.
  3. Procédé selon la revendication 2, caractérisé en ce que
    l'intensité de nettoyage est augmentée d'autant plus que l'intervalle de temps est réduit.
  4. Procédé pour nettoyer une bande de transport d'une machine de fabrication d'une nappe de matériau, en particulier une nappe de papier ou de carton, la bande de transport étant nettoyée sur toute sa largeur avec une intensité différente, selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    la zone de nettoyage de la bande de transport est soumise à une pression négative et en ce que la pression est réglée en fonction de l'intensité de nettoyage souhaitée.
  5. Procédé pour nettoyer une bande de transport d'une machine de fabrication d'une nappe de matériau, en particulier une nappe de papier ou de carton, la bande de transport étant nettoyée sur toute sa largeur avec une intensité différente, selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    les bords de la bande de transport sont nettoyés avec une plus grande intensité que la zone de la bande de transport intermédiaire.
  6. Procédé selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    la bande de transport est nettoyée avec un fluide de nettoyage gazeux ou liquide sous pression et en ce que l'intensité de nettoyage est influencée par le réglage de la pression du fluide de nettoyage en utilisant une commande ou une régulation.
  7. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que
    la quantité de fluide de nettoyage apportée sur la zone de la bande de transport à nettoyer est réglée.
  8. Dispositif pour nettoyer une bande de transport d'une machine de fabrication d'une nappe de matériau, en particulier une nappe de papier ou de carton, comprenant un dispositif de buses comprenant au moins une buse, au moyen duquel la bande de transport peut être sollicitée par un fluide de nettoyage sous pression, selon l'une quelconque des revendications 1 à 7, dans lequel le dispositif de buses (5) est réalisé de telle sorte que la bande de transport (7) soit nettoyée - vu sur toute la largeur - avec une intensité différente, caractérisé en ce que,
    pour influencer l'intensité de nettoyage, le dispositif de buses (5) présente au moins deux buses activables et désactivables séparées l'une de l'autre.
  9. Dispositif selon la revendication 8, caractérisé en ce que
    la pression du fluide de nettoyage peut être réglée en fonction de l'intensité de nettoyage souhaitée.
  10. Dispositif selon la revendication 9, caractérisé en ce que
    la pression du fluide de nettoyage peut être réglée au moyen d'une commande et/ou d'une régulation, qui influence la vitesse de rotation d'une pompe servant à l'alimentation du dispositif de buses (5) en fluide de nettoyage.
  11. Dispositif selon l'une quelconque des revendications 8 à 10, caractérisé en ce que
    le dispositif de buses (5) est monté de manière déplaçable transversalement à la direction d'avance de la bande de transport (7) et en ce que sa vitesse de traversée peut être réglée pour influencer l'intensité de nettoyage.
  12. Dispositif selon l'une quelconque des revendications 8 à 11, caractérisé en ce qu'il est prévu un espace d'aspiration (15) coopérant avec le dispositif de buses (5), se trouvant en relation d'écoulement avec un dispositif d'aspiration par le biais d'une conduite d'aspiration (13), et en ce que la puissance d'aspiration du dispositif d'aspiration peut être réglée en fonction de l'intensité de nettoyage souhaitée.
  13. Dispositif selon la revendication 12, caractérisé en ce que
    la puissance d'aspiration peut être réglée au moyen d'une soupape prévue dans la conduite d'aspiration (13), de préférence sans incrément.
EP98108953A 1997-06-25 1998-05-16 Procédé et appareil pour nettoyer une bande de transport Expired - Lifetime EP0887460B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP02002843A EP1219747B2 (fr) 1997-06-25 1998-05-16 Procédé pour nettoyer une bande de transport

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19726897 1997-06-25
DE19726897A DE19726897C2 (de) 1997-06-25 1997-06-25 Verfahren zum Reinigen eines Transportbandes

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP02002843A Division EP1219747B2 (fr) 1997-06-25 1998-05-16 Procédé pour nettoyer une bande de transport

Publications (3)

Publication Number Publication Date
EP0887460A1 EP0887460A1 (fr) 1998-12-30
EP0887460B1 true EP0887460B1 (fr) 2002-08-14
EP0887460B2 EP0887460B2 (fr) 2006-10-04

Family

ID=7833562

Family Applications (2)

Application Number Title Priority Date Filing Date
EP98108953A Expired - Lifetime EP0887460B2 (fr) 1997-06-25 1998-05-16 Procédé et appareil pour nettoyer une bande de transport
EP02002843A Expired - Lifetime EP1219747B2 (fr) 1997-06-25 1998-05-16 Procédé pour nettoyer une bande de transport

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP02002843A Expired - Lifetime EP1219747B2 (fr) 1997-06-25 1998-05-16 Procédé pour nettoyer une bande de transport

Country Status (3)

Country Link
US (1) US5964956A (fr)
EP (2) EP0887460B2 (fr)
DE (3) DE19726897C2 (fr)

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CN104185703A (zh) * 2012-04-11 2014-12-03 佐治亚-太平洋消费产品有限合伙公司 用来清洁用来制造纸幅材的运输带的方法
US10201840B2 (en) 2012-04-11 2019-02-12 Gpcp Ip Holdings Llc Process for cleaning a transport belt for manufacturing a paper web
US10744545B2 (en) 2012-04-11 2020-08-18 Gpcp Ip Holdings Llc Process for cleaning a transport belt for manufacturing a paper web

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Publication number Publication date
EP1219747B2 (fr) 2007-10-10
DE19726897A1 (de) 1999-01-07
EP0887460A1 (fr) 1998-12-30
DE19726897C2 (de) 2000-01-13
EP1219747A3 (fr) 2002-07-24
EP0887460B2 (fr) 2006-10-04
EP1219747B1 (fr) 2004-02-04
DE59810727D1 (de) 2004-03-11
EP1219747A2 (fr) 2002-07-03
DE59805159D1 (de) 2002-09-19
US5964956A (en) 1999-10-12

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