EP4101977A1 - Barre de raclage et kit destinés à l'utilisation dans une installation de production de bandes en papier - Google Patents

Barre de raclage et kit destinés à l'utilisation dans une installation de production de bandes en papier Download PDF

Info

Publication number
EP4101977A1
EP4101977A1 EP22171583.2A EP22171583A EP4101977A1 EP 4101977 A1 EP4101977 A1 EP 4101977A1 EP 22171583 A EP22171583 A EP 22171583A EP 4101977 A1 EP4101977 A1 EP 4101977A1
Authority
EP
European Patent Office
Prior art keywords
elements
strip
support strip
screen belt
strips
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.)
Pending
Application number
EP22171583.2A
Other languages
German (de)
English (en)
Inventor
Klaus Bartelmuss
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP4101977A1 publication Critical patent/EP4101977A1/fr
Pending legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G3/00—Doctors
    • D21G3/005—Doctor knifes
    • 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
    • D21F1/48—Suction apparatus
    • D21F1/483—Drainage foils and bars
    • 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
    • D21F1/48—Suction apparatus
    • D21F1/483—Drainage foils and bars
    • D21F1/486—Drainage foils and bars adjustable
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/029—Wet presses using special water-receiving belts

Definitions

  • the present invention relates to a scraper bar for use in a system for producing a paper web with a screen belt, the scraper bar having a longitudinal extent and the screen belt being movable across the longitudinal extent over the scraper bar, and the scraper bar having wear elements facing the screen belt which are mounted on a Support bar mounted and lined up in the direction of the longitudinal extension of the wiper strip.
  • the present invention also relates to a kit for use in a plant for producing a paper web and a plant for producing a paper web.
  • Known systems for producing a paper web have a self-contained screen belt which is moved in circulation by means of conveyor rollers and onto which a pulp is sprayed at the start of the system.
  • the screen belt In a first area of the plant, the screen belt is moved over squeegee strips and over suction boxes designed with squeegee strips, through which liquid that has escaped from the pulp pulp is stripped off and sucked off.
  • the paper web produced on the screen belt is dried using felt belts.
  • the squeegee strips located in such a system which are aligned transversely to the direction of movement of the sieve belt, are made of metal or plastic, which on their upper side facing the sieve belt in the operating position has a support or wearing elements made of a wear-resistant material, in particular made of ceramic plates ground flat , exhibit.
  • a wear-resistant material in particular made of ceramic plates ground flat , exhibit.
  • ceramic plates consist in particular of Al oxide, Zr oxide, Si nitride and Si carbide.
  • the main web is moved over the scraper bars at a speed of 1 m/sec to 40 m/sec.
  • the wearing elements are worn out by the friction between the scraper bars and the filter belt.
  • the present invention is therefore based on the object of creating a wiping strip that can be individually adapted to desired lengths.
  • the wiping strip according to the invention has support strip elements which can have a length of, for example, 0.5 m, 1 m or 2 m.
  • support strip elements can also be produced with any lengths between the specified lengths, as well as shorter or longer support strip elements.
  • modular parts can be prefabricated in different lengths, from which wiper strips can be produced in almost any length.
  • a squeegee with a total length of e.g. 8.5 m can be made, for example, from four support rail elements with a length of 2 m and one support rail element of 0.5 m.
  • One, two or more than two wear elements are fastened on the support strip elements, viewed in the longitudinal extension of the support strip.
  • the support strip elements manufactured as modular parts, each with one or more wearing elements, can be manufactured automatically. As a result, this production step is no longer directly order-related and can be largely automated in a separate production line.
  • These modular parts can be produced to stock and a Wiper strip for a customer can be assembled from several of these parts without delay.
  • the support strip elements have end faces on which they rest against adjacent support strip elements, with the support strip elements having a form-fitting geometry on one or both end faces which fits into the form-fitting geometry of an adjoining support strip element intervenes.
  • the form-fitting geometry has ribs or tines, which preferably run parallel to the direction of movement of the screen belt. This is advantageous because the critical height of the wearing elements of supporting rail elements that are connected to one another is thus precisely defined.
  • the object according to the invention is also achieved with a kit having the features of claim 11 .
  • Such a kit has the advantage that the wiping strip elements according to the invention can be easily and precisely assembled to form wiping strips and installed in a system mounted in a frame.
  • sealing elements are arranged between the wiper strips in the region of the ends of the wiper strips.
  • the sealing elements are used to seal the edge area of the kit to the filter belt so that a vacuum can be built up.
  • the sealing elements have two tensioning elements, which are arranged one behind the other in the direction of the longitudinal extent and abut one another at inclined surfaces which are oriented at an angle other than 90° to the longitudinal extent.
  • the object of the invention is further achieved with a plant for producing a paper web, which has the wiper strips according to the invention and optionally the kit according to the invention.
  • In 1 shows a section of a wire 1 in a plant for the production of a paper web, on which there is a layer of pulp 2 and which moves in the direction of the arrow over a group of scraper bars 3a becomes.
  • the pulp 2 is sprayed onto the screen belt 1 at the beginning of this.
  • the squeegee strips 3a have a support strip 4a, on the upper side of which, facing the screen belt 1, wearing elements 5a made of a wear-resistant material are fastened.
  • the illustrated embodiment of the invention is preferably used in a part of the plant in which the pulp has already been dewatered to a certain extent.
  • a suction box 6 in the interior 7 of which there is a negative pressure of about -2 mbar to -700 mbar. Due to the negative pressure prevailing in the interior 7 of the suction box 6, a suction force is exerted on the pulp 2, by means of which the liquid F contained in this is drawn off.
  • the liquid F emerging from the pulp 2 penetrates the screen belt 1 and reaches the underside of the screen belt 1, from which it is scraped off by the squeegee bars 3a during the movement of the screen belt 1 and enters the suction box 6, through which it is discharged .
  • the squeegee strips 3a are mounted on a frame 16 which is detachably fastened to the upper side of the suction box 6 .
  • the squeegee 3b on a support bar 4b, on the upper side facing the screen belt 1 wearing elements 5b made of a wear-resistant material are attached.
  • the screen belt 1 which can extend over a length of up to about 50 m and usually has a width of 2 m to 12 m, is conveyed by means of conveyor rollers located in the system at a speed of, for example, 1 m/sec to 40 m/sec moved over the squeegee 3a, 3b away.
  • the support rails 4a, 4b are usually, but not necessarily, made of a glass fiber reinforced plastic, acid-resistant stainless steel or a plastic such as polyethylene.
  • the suction box 6 of the embodiment of FIG 1 and box 8 of the embodiment of FIG 2 is usually also made of acid-resistant stainless steel.
  • the wear elements 5a, 5b located on the support rails 4a, 4b are preferably plates made of a ceramic material, e.g. Al oxide (hardness HV 0.5 18000 N/mm 2 ), Zr oxide (hardness HV 0.5 12700 N/mm 2 ), Si nitride (hardness HV 0.5 18800 N/mm 2 ), Si carbide (hardness HV 0.5 28150 N/mm 2 ).
  • the ceramic plates have a length of, for example, 12 mm to 230 mm in the longitudinal extension of the scraper strips 3a, 3b and a width of, for example, 12 mm to 100 mm transversely to the scraper strips 3a, 3b and also a height of, for example, 2 mm to 10 mm.
  • the surfaces of the squeegee strips 3a, 3b, in particular the ceramic plates 5a, 5b, are ground flat according to the prior art, with surface roughness values Ra from 0.15 ⁇ m to 0.7 ⁇ m.
  • a first embodiment of a wiper strip 3b according to the invention is shown, which is composed of support strip elements 9b, the wiper strip 3b having four support strip elements 9b in the embodiment shown.
  • the two middle support strip elements 9b have a length of 2 m, for example, and the two outer support strip elements 9b have a length of 1 m, for example.
  • the support strip elements 9b each have two end faces 11b, 12b.
  • the central support strip elements 9a have two end faces 11b, which, as in 4 can be seen to have a form-fitting geometry 13 which corresponds to the form-fitting geometry 13 of the end face 11b of an adjoining support strip element 9b.
  • the form-fitting geometry consists of ribs or prongs aligned horizontally, ie parallel to the wear elements 5b, so that support rail elements 9b joined together engage one another with their form-fitting geometries 13 in a tooth-like manner. This ensures that the height of the upper side of the wearing elements 5b of supporting strip elements 9b adjoining one another is exactly aligned.
  • the support strip elements 9b are preferably glued together at their end faces 11b before they are installed in a system will. Alternatively, the supporting strip elements 9b can also be glued together during installation. Of course, gluing is not absolutely necessary.
  • a support strip element 9b arranged at the end of a support strip 3b can also have a smooth end face 12b, because it does not have to form a positive fit with any adjacent support strip elements 9b.
  • the support strip elements 9b On their underside, i.e. the side opposite the wear elements 5b, the support strip elements 9b have a depression 14 running in the direction of their longitudinal extension, which in the illustrated embodiment has a T-shaped geometry. Corresponding T-shaped bars 10 are attached to the box 8, onto which the support bar elements 9b are pushed.
  • FIG 5 a second embodiment of support strip elements 9a is shown, which corresponds to the embodiment of FIG 2 and 3 is similar and preferably, but not necessarily, in the embodiment of FIG 1 is used in conjunction with a kit 15 according to the invention, as described below with reference to FIG Figures 6 to 8 is described.
  • the kit 15 has a frame 16 which is composed of crossbeams 17 and longitudinal beams 18 and in which a plurality of scraper strips 3a are mounted.
  • the longitudinal beams 18 have a substantially L-shaped geometry, with recesses in the form of slots 21 being provided in a substantially horizontally aligned leg 19 of the longitudinal beam 18 .
  • the ends of the transverse supports 17 which are flat in the illustrated embodiment are accommodated in these slots 21 so that they are fixed in the longitudinal direction of the longitudinal supports 18 .
  • the cross member 17 by means of screws 22 to the Fixed longitudinal members 18, which are screwed through the longitudinal members 18 in the end faces of the cross member 17.
  • the wiper strips 3a can be used in the stable frame 16 produced in this way.
  • the distance between the crossbeams 17 depends on the one hand on the length of the support rail elements 9a and is chosen such that each support rail element 9a rests on at least two crossbeams 17 .
  • the distance between the crossbeams 17 is determined by the load to be expected from the negative pressure in the suction box 6 .
  • the crossbeams 17 have at their upper edge recesses 20, in the center of which are pins 23.
  • the support strip elements 9a have bores 24 on their underside. In the installed state, the wiper strips 3a sit in the recess 20 of the crossbeam 17 and the pins 23 of the crossbeam 17 protrude into the bore 24 of the support strip elements 9a.
  • the support strip elements 9a are fastened to the crossbeam 17 by filling the bores 24 with adhesive.
  • sealing elements 25 are arranged on both sides between the front ends of the wiper strips 3a.
  • the sealing elements 25 each consist of two clamping elements 26, 27 which abut one another on inclined surfaces 28 which are aligned at an angle ⁇ unequal to 90°, preferably between 45° and 60°, to the longitudinal extent of the wiper strips 3a.
  • clamping elements 26, 27 are pulled towards one another by a clamping screw 29 which is passed through a through hole in one clamping element 26 and is screwed into the other clamping element 27.
  • a clamping screw 29 which is passed through a through hole in one clamping element 26 and is screwed into the other clamping element 27.
  • Springs 32 are arranged on both sides 31 of the clamping elements 26, 27 and engage in grooves 33 on both sides 34 of the supporting strip elements 9a, so that the clamping elements 26, 27 are secured in their correct position.

Landscapes

  • Paper (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)
EP22171583.2A 2021-06-08 2022-05-04 Barre de raclage et kit destinés à l'utilisation dans une installation de production de bandes en papier Pending EP4101977A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ATA50464/2021A AT524317B1 (de) 2021-06-08 2021-06-08 Abstreifleiste und Bausatz zur Verwendung in einer Anlage zur Erzeugung einer Papierbahn

Publications (1)

Publication Number Publication Date
EP4101977A1 true EP4101977A1 (fr) 2022-12-14

Family

ID=81535431

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22171583.2A Pending EP4101977A1 (fr) 2021-06-08 2022-05-04 Barre de raclage et kit destinés à l'utilisation dans une installation de production de bandes en papier

Country Status (8)

Country Link
US (1) US11926962B2 (fr)
EP (1) EP4101977A1 (fr)
JP (1) JP7469384B2 (fr)
CN (1) CN115450064A (fr)
AT (1) AT524317B1 (fr)
BR (1) BR102022006295A2 (fr)
CA (1) CA3157601A1 (fr)
TW (1) TWI801246B (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3306457A1 (de) * 1983-02-24 1984-08-30 Feldmühle AG, 4000 Düsseldorf Entwaesserungselement fuer den nassteil einer papiermaschine
DE4319311A1 (de) * 1993-06-11 1994-12-15 Cerasiv Gmbh Anordnung zur Befestigung von keramischen Formkörpern auf einem Trägerkörper
DE69119295T2 (de) * 1990-05-04 1996-09-12 Wilbanks Int Saugkastenvorrichtung mit Verbunddeckelelementen eingesetzt in Schlitze auf Querträgern

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5076894A (en) * 1990-05-04 1991-12-31 Simmons Holt W Suction box apparatus with composite cover elements mounted in slots on cross braces
JP3346713B2 (ja) * 1996-12-27 2002-11-18 京セラ株式会社 抄紙機用フォイル
AT413392B (de) 2003-05-28 2006-02-15 Bartelmuss Klaus Ing Abstütz- bzw. abstreifeinrichtung für siebbandanlagen
BRPI0621982A2 (pt) * 2006-08-29 2011-12-20 Daetwyler Swisstec Ag lámina de raspar
DE502007001483D1 (de) * 2006-10-16 2009-10-22 Heinz Bartelmuss Siebleiste für Papiererzeugungsanlagen
FI122553B (fi) * 2010-07-26 2012-03-15 Metso Paper Inc Kaavinlaitteisto kuiturainakonetta varten ja kaavinterä kuiturainakoneen kaavinlaitteistoa varten
FI125031B (fi) * 2011-01-27 2015-04-30 Valmet Technologies Inc Jauhin ja teräelementti
CN111530690A (zh) * 2020-05-11 2020-08-14 山东膜丽东方新材料科技有限公司 涂布机的涂布机构

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3306457A1 (de) * 1983-02-24 1984-08-30 Feldmühle AG, 4000 Düsseldorf Entwaesserungselement fuer den nassteil einer papiermaschine
DE69119295T2 (de) * 1990-05-04 1996-09-12 Wilbanks Int Saugkastenvorrichtung mit Verbunddeckelelementen eingesetzt in Schlitze auf Querträgern
DE4319311A1 (de) * 1993-06-11 1994-12-15 Cerasiv Gmbh Anordnung zur Befestigung von keramischen Formkörpern auf einem Trägerkörper

Also Published As

Publication number Publication date
US20220389655A1 (en) 2022-12-08
TW202247972A (zh) 2022-12-16
AT524317B1 (de) 2022-05-15
AT524317A4 (de) 2022-05-15
JP2022187994A (ja) 2022-12-20
CN115450064A (zh) 2022-12-09
TWI801246B (zh) 2023-05-01
US11926962B2 (en) 2024-03-12
JP7469384B2 (ja) 2024-04-16
CA3157601A1 (fr) 2022-12-08
BR102022006295A2 (pt) 2022-12-20

Similar Documents

Publication Publication Date Title
DE2855164A1 (de) Abdeckleistenanordnung fuer bandfoerderer
EP2814627B1 (fr) Presse à cintrer doté d'élément barre réglable
EP1916331B1 (fr) Barre de criblage pour installations de production de papier
DE1991855U (de) Bauteil fuer papiermaschinen oder zellstoffentwaesserungsmaschinen.
EP0163820A1 (fr) Installation de compression sur des pièces en mouvement continu
WO2018157992A1 (fr) Dispositif d'amenée et procédé permettant de mettre au point un dispositif d'amenée
AT524317B1 (de) Abstreifleiste und Bausatz zur Verwendung in einer Anlage zur Erzeugung einer Papierbahn
WO2005068108A1 (fr) Machine de coulee
EP2058248A2 (fr) Transporteur destiné au transport de marchandises
EP0767318A2 (fr) Amortisseur en matériau d'élasticité permanente en forme de natte ou de bande
AT411770B (de) Siebleiste für eine papiererzeugungsanlage
EP0527344B1 (fr) Bras haveur pour machines à haver de matériau en pierre dure
DE4300303A1 (de) Spannsieb
DE2706277C3 (de) Siebboden
DE102015000983A1 (de) Messerkopf für eine Produktschneidemaschine
EP2202355B1 (fr) Dispositif de fixation amovible d'une barre de criblage dans une installation destinée à la production de papier
DE4140210C2 (de) Siebdeck für eine Siebmaschine
AT519874B1 (de) Abstreifleiste zur Verwendung in einer Anlage zur Herstellung eines Papierbandes, Bausatz und Anlage zur Herstellung eines Papierbandes
DE19856338B4 (de) Abstreifvorrichtung für Förderbänder
EP3241618A1 (fr) Grille de tamis
DE102020103452B3 (de) Förderbandsegment eines Plattenförderbandes, Plattenförderband und Verfahren zum Herstellen eines Förderbandsegments
EP1524211B1 (fr) Bande de transport pour un convoyeur
EP3406792B1 (fr) Dispositif destiné à étanchéifier l'espace de filtre-presse entre deux éléments de filtre-presse dans la zone cunéiforme de la presse-pâte
EP0633358A1 (fr) Dispositif pontant pour un joint de dilatation dans une chaussée, en particulier dans des tabliers de pont
EP1411166B1 (fr) Dispositif pour équipement de papeterie avec au moins une bande de tamisage

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20230606

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR