EP1792860A2 - Dispositif à dépression d'alimentation d'une bande pour guider une bande en movement - Google Patents

Dispositif à dépression d'alimentation d'une bande pour guider une bande en movement Download PDF

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Publication number
EP1792860A2
EP1792860A2 EP06024085A EP06024085A EP1792860A2 EP 1792860 A2 EP1792860 A2 EP 1792860A2 EP 06024085 A EP06024085 A EP 06024085A EP 06024085 A EP06024085 A EP 06024085A EP 1792860 A2 EP1792860 A2 EP 1792860A2
Authority
EP
European Patent Office
Prior art keywords
gap
long
vacuum belt
belt conveyor
ejector
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.)
Granted
Application number
EP06024085A
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German (de)
English (en)
Other versions
EP1792860A3 (fr
EP1792860B1 (fr
Inventor
Andreas Pesch
Bernhard Schmitz
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.)
Andritz Kuesters GmbH
Original Assignee
Andritz Kuesters 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 Andritz Kuesters GmbH filed Critical Andritz Kuesters GmbH
Publication of EP1792860A2 publication Critical patent/EP1792860A2/fr
Publication of EP1792860A3 publication Critical patent/EP1792860A3/fr
Application granted granted Critical
Publication of EP1792860B1 publication Critical patent/EP1792860B1/fr
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Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B65H20/10—Advancing webs by a feed band against which web is held by fluid pressure, e.g. suction or air blast
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/52—Auxiliary process performed during handling process for starting
    • B65H2301/522—Threading web into machine

Definitions

  • the invention relates to a vacuum belt conveyor device for guiding a moving web, in particular a web insertion strip of a paper or board web, according to the preamble of claim 1.
  • Vacuum belt conveyors for guiding a traveling web are used in various industrial plants to securely hold a web in transit. This is especially true for paper and board machines, where the web is transferred from one machine section to another machine section, for example from the wet end to the dryer section or from the dryer section to the finishing section.
  • vacuum belt conveyors in paper or board machines to facilitate threading the paper or board web into a machine for making, finishing or further processing such a web.
  • a narrow ribbon or introduction strip is separated from the running web.
  • This tape is transferred by means of the vacuum belt conveyor, for example, from the end of a machine section to the inlet area of a subsequent machine section.
  • the conveyor device comprises an air-permeable, endless conveyor belt, which runs over two rollers and a suction box or vacuum box. As a result, the insertion strip is sucked and transported to the conveyor belt.
  • a vacuum blower is provided to create vacuum or negative pressure within the suction box.
  • the vacuum blower comprises an impeller having an exhaust passage.
  • the impeller is driven by a suitable motor.
  • the suction box has one or more suction openings, via which the vacuum blower generates negative pressure in the interior of the suction box.
  • a disadvantage is the complex and large-scale construction, which is also maintenance-prone and expensive to manufacture and in operation. The sealing of the suction box is also difficult.
  • a device for transporting and guiding the Bruendauf arrangementsbandes in a paper machine which consists of a arranged around two or more guide rollers conveyor belt, which is permeable to air and within which loop devices are mounted, with which at the one run of the conveyor belt, with the Endiller technologicalband is transported, a negative pressure effect is achieved, whereby the Endiller arrangementsband is stapled to the said run and adhered to it.
  • the negative pressure is generated by air blowing means mounted inside the loop, which comprise guide plates which extend substantially parallel to the plane of the conveyor belt and at which a dynamic negative pressure effect can be generated by air blows, with which the Endiller arrangementsband is stapled to the conveyor belt.
  • the disadvantage is that for blowing the guide plates a fairly large amount of air is required, which is to be diverted and leads to undesirable blowing currents in the area around the device.
  • the object of the invention is therefore to provide a vacuum belt conveyor device for guiding a running web, which is structurally simple and takes up little space.
  • a vacuum belt conveyor device for guiding a moving web, in particular a web insertion strip, created, the device for applying a negative pressure next to a small size has adapted to the purpose of construction, namely a rectangular shape.
  • the suction power is high and adjustable in the longitudinal and transverse directions. Pressure drops between individual suction centers are minimized so that a substantially uniform vacuum across the width and / or length of the conveyor belt is adjustable to hold a web.
  • a nozzle row arrangement of the at least one long-gap ejector extends transversely to the strip running direction and generates an air flow perpendicular to the band. The air flow is then simply downwards derivable, whereby obstructions are minimized by unwanted air currents in the area of the device.
  • a gap space of the at least one long-gap ejector preferably has a section with a narrowed cross-section in order to achieve a high degree of efficiency. If a lower efficiency is sufficient, the gap space can also be formed without a cross-sectional constriction.
  • the at least one long-gap ejector may also work in conjunction with a suction space, for which purpose a partition may be provided within the loop.
  • the partition is preferably arranged in the longitudinal direction of the conveyor belt and at a distance below the run, which is provided for holding the web.
  • an intake space above the dividing wall is separated from an outflow space below the dividing wall.
  • the outflow space is formed in an area above the returning other strand and may be formed open or closed to the outside. If a plurality of long-gap ejectors are arranged one behind the other in the longitudinal direction, transverse dividing walls can also be provided which subdivide the suction space and possibly the outflow space into a plurality of chambers arranged one behind the other. Selectable vacuum profiles along the conveyor belt are adjustable in this way.
  • a passage can be provided in the latter, which passage is provided with an adjustable throttle. About the throttle, a flow rate can be determined and thus set a maximum vacuum level.
  • the arrangement of the at least one long-gap ejector can be carried out vertically working to the conveyor belt or at an angle to the conveyor belt.
  • the at least one long-gap ejector may have a gap space which has a cross-sectional widening on the outflow side.
  • the outflowing air can thereby be given a better distribution.
  • the at least one long-gap ejector may have a gap whose flow path length is selectable. Consequently, the gap space can not only serve to draw in air for generating negative pressure, but can also simultaneously be used for targeted removal of air from the area of application of negative pressure.
  • the air jet injector can be arranged in a converging formed entry region of the at least one long-gap ejector.
  • the orientation of the entry region of the long-gap ejectors or the direction of movement of the conveyor belt is selectable.
  • the inlet region can be arranged transversely or obliquely to the direction of travel or in the direction of travel, with multiple long-gap ejectors being able to be arranged at a distance from or immediately adjacent to one another in order to form selectable negative-pressure fields.
  • only one row of long-gap ejectors for example a center strip, can be provided or several rows of long-gap ejectors can be arranged parallel and spaced from one another, for example two edge strips.
  • the vacuum belt conveyor device 1 shows a vacuum belt conveyor 1 for guiding a traveling web 2, in particular a web insertion strip of a paper or board web.
  • the vacuum belt conveyor device 1 comprises guide rollers 3 and 4, between which a conveyor belt 5 is arranged.
  • the conveyor belt 5 is endlessly guided in a loop 8 with a top run 6 and a bottom run 7, as shown for example in FIG.
  • the conveyor belt 5 is permeable to air and consists of a cloth with sufficient permeability or a material web with hole structure.
  • the device 9 for applying a negative pressure is formed by means of at least one long-gap ejector 10, 11 each having an air jet injector 12, 13 with a plurality of air outlet nozzles 14 along the inlet side 15, 16 of the extended nip 17, 18 and the inlet side at a distance below the inside of the is positioned to hold the track provided Trumms 6.
  • subsequent supply lines 21, 22 of the air jet injector 12, 13 of the at least one long-gap ejector 10, 11 fed by an air source, not shown, to inject air into the associated extended nip 17, 18 can.
  • the injected air flows at high speed through the air outlet nozzles 14, whereby air is sucked in on the inlet side 15, which is located in the head-side environment of the at least one long-gap ejector 10, 11.
  • a negative pressure on the inside of the run 6 can be applied by one or more air nozzles are mounted below the belt 5.
  • the pressure of the supplied air is adjustable, which can influence the suction power. If a plurality of long-gap ejectors 10, 11 are arranged one behind the other in the running direction, they can receive the same or different air supply, in order to thereby design individually adjustable suction power profiles in the transport direction T.
  • the long-gap ejector 10 has a substantially rectangular shape and has an air jet injector 12.
  • the jet injector 12 is formed by a nozzle-19, which is arranged in the gap longitudinal direction and generates an air flow in the gap 20 of the extended gap 17.
  • the nozzle assembly 19 is preferably recessed with respect to the inlet side 15, whereby the air sucked in on the inlet side is directed into the gap 20.
  • the air jet injector 12 is seated in a converging inlet region 23 of the long-gap ejector 10, wherein the short side edges 24, 25 of the extended-nip 17 are preferably rounded.
  • the extended gap 17 of the long-gap ejector 10 can delimit the gap 20 with parallel surfaces from the inlet side 15 to an outlet side 26, that is to say extend without a narrowed cross-section (compare FIGS. 12a, 12b). It is preferred to form the gap 20 with a narrowed cross-section for a high efficiency.
  • the inlet region 23 with converging side surfaces then extends below the air jet injector 12. The constriction in the cross section of the extended nip 17 promotes the formation of a closed flow and thus an advantageous sealing of the Heilstrahlejektors 12.
  • the suction of a long-gap ejector 10, 11 at the inlet side 15 is controllable via the fed air flow and by the shape of the extended gap 17 between the inlet side 15 and outlet side 26. DieShuff des Long gap 17 in the flow direction is selectable and opens up an advantageous discharge of air.
  • the extended gap 17 is preferably formed with an enlarged cross-sectional portion 40, whereby the outflow behavior of the long-gap ejector 10 is improved with respect to a wide air outlet distribution.
  • Even with a narrowed cross-section of the extended nip input and / or output side of the extended nip 17 preferably has a portion with parallel side surfaces, which can make up about 50 to 80% of the total length of the extended nip 17 in the flow direction between the inlet side 15 and outlet side 26.
  • the extended nip 17 thus forms a guide channel for the air flow with a selectable flow path length.
  • the first embodiment of a vacuum belt conveyor device comprises the device 9 for applying negative pressure two long-gap ejectors 10, 11, which are arranged in the transport direction T at a distance one behind the other.
  • the number of juxtaposed long-gap ejectors 10, 11 can be selected.
  • the distance from the inside of Trumms 6 is also selectable and depends on the intake. A minimum distance ensures that a suction area, although local, but sufficiently flat.
  • the extent of the extended nip 17 in the longitudinal direction of the gap can be selected as a function of a width of the conveyor belt 5, so that it is sucked over the entire width of the conveyor belt 5.
  • the long-gap ejector (s) 10, 11 can be arranged at selectable locations, that is to say be positioned where a suction characteristic is desired.
  • the respective air jet injector 12 with the associated nozzle assembly 19 preferably extends transversely to the direction of belt travel T and generates an air flow vertically to the belt 5.
  • the long-gap ejectors 10, 11 are arranged here working perpendicular to the conveyor belt 5.
  • a holder 27 For positioning the at least one long-gap ejector 10, 11, a holder 27 is provided, which holds the long-gap ejectors 10, 11 stationary in the loop 8.
  • the long-gap ejectors 10, 11 can furthermore be arranged freestanding in the loop 8.
  • the holder 27 may be formed by a frame of the device 1, in which the guide rollers 3, 4 are mounted.
  • the conveyor belt 5 is moved in the transport direction T by at least one driven deflection roller 3, 4.
  • a drive motor 28 is provided for the deflection roller 3 for this purpose.
  • support grid not shown, may be provided.
  • a dividing wall 29 is arranged within the loop 8.
  • the partition wall 29 separates an intake space 33, 34, in which the inlet side 15 of the at least one long-gap ejector 10, 11 is arranged with its respective inlet, from an outflow space 35, 36, in which the outlet side 26 of the at least one long-gap ejector 10, 11 with its respective outlet is arranged.
  • the partition wall 29 preferably extends substantially parallel to the conveyor belt 5.
  • the suction chamber 33, 34 preferably forms an upper chamber and the outflow space 35, 36 a lower chamber, which are bounded laterally by cover plates 31, 32 with respect to the guide rollers 3, 4th
  • the suction chamber 33, 34 is bounded at the top by the run 6 of the air-permeable conveyor belt 5. Alternatively, the limitation can be made upward through a perforated plate on which the run 6 runs out. The distribution as well as the opening widths of the holes allow influencing the negative pressure characteristic on the inside of the run 6.
  • the outflow space 35, 36 is bounded below by the returning Trumm 7.
  • a transverse partition wall 30 By means of a transverse partition wall 30, the subdivision of the suction chambers 33, 34 and outflow spaces 35, 36 is possible.
  • the at least one long-gap ejector 10, 11 sucks in the air from the respective intake space 33, 34, whereby an intake field corresponding to the intake space 33, 34 is applied to the inside of the run 6.
  • the distance of the inlet side 15 of the at least one long-gap ejector 10, 11 from the inside of the run 6 can be selected to be greater than in the freestanding long-gap ejector 10, 11 shown in FIG. 2.
  • the inlet side 15 is preferably positioned in a central region of the suction space 33, 34.
  • an adjustable throttle 37, 38 is arranged in the partition wall 29. Via the throttle 37, 38, a flow rate between a suction chamber 33, 34 and a discharge chamber 35, 36 determined and thus a maximum vacuum level in a suction chamber 33, 34 are set.
  • a maximum negative pressure in the suction space 33, 34 can be defined via such a bypass between intake space 33, 34 and outflow space 35, 36. From a certain negative pressure value, no further negative pressure builds up, since then the bypass flow via the throttle 37, 38 corresponds to the suction flow. A certain pressure difference is adjusted.
  • the vacuum level is also adjustable.
  • Each intake chamber 33, 34 with associated outflow space 35, 36 is preferably associated with a throttle 37, 38.
  • the drive power of the motor 28 can be kept small by limiting the vacuum level.
  • the illustrated in Fig. 8 fourth embodiment of the vacuum belt conveyor device 1 differs from the third embodiment shown in Fig. 7 in that the at least one long-gap ejector 10, 11 is not arranged perpendicular to the conveyor belt 5 working, but at an angle to the conveyor belt working is arranged.
  • the long-gap ejectors 10, 11 are inclined or tilted to the transport plane of the conveyor belt 5.
  • the suction is the outflow with respect to the transport direction T leading or trailing formable.
  • 9 to 11 embodiments of the vacuum belt conveyor device 1 relate to different arrangements of at least two long-gap ejectors 10, 11 with respect to the running direction T.
  • a first long-gap ejector 10 is positioned transversely to the running direction T. while a second spaced-apart long-gap ejector 11 is disposed obliquely to the transporting direction T. The order can also be reversed.
  • both long-gap ejectors 10, 11 are arranged obliquely to the transport direction T. The angle to the transport direction T is selectable depending on the choice of the vacuum profile that can be generated thereby.
  • the long-gap ejectors 10, 11 are arranged in a row one behind the other, forming a suction strip 39.
  • this suction strip 39 can form a median strip.
  • an edge strip or edge strips on both sides may be provided. Incidentally, the above statements apply to the embodiments one to four here accordingly.
  • Figures 12a and 12b show an eighth and ninth embodiment of the vacuum belt conveyor device 1, which differ from the above embodiments in that the extended nip 17, 18 has no cross-sectional constriction, that has parallel side walls. The efficiency is lower, so that the long-gap ejector 10, 11 is preferably arranged closer to the inside of the run 6 of the conveyor belt 5.
  • the eighth Embodiment of FIG. 12a the embodiments of the first embodiment of FIG. 2 accordingly.
  • the statements relating to the third and fourth exemplary embodiment according to FIGS. 7 and 8 apply correspondingly.
  • the vacuum belt conveyor device 1 can also operate rotated through 180 °, i. the negative pressure on the returning Trumm be applied with appropriate rotation of the long-gap ejectors and reversal of the transport direction.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Advancing Webs (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
EP06024085A 2005-11-30 2006-11-21 Dispositif à dépression d'alimentation d'une bande pour guider une bande en movement Active EP1792860B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005057426A DE102005057426A1 (de) 2005-11-30 2005-11-30 Unterdruck-Bandfördervorrichtung zum Führen einer laufenden Bahn

Publications (3)

Publication Number Publication Date
EP1792860A2 true EP1792860A2 (fr) 2007-06-06
EP1792860A3 EP1792860A3 (fr) 2009-03-11
EP1792860B1 EP1792860B1 (fr) 2011-09-14

Family

ID=37807982

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06024085A Active EP1792860B1 (fr) 2005-11-30 2006-11-21 Dispositif à dépression d'alimentation d'une bande pour guider une bande en movement

Country Status (5)

Country Link
US (1) US7625465B2 (fr)
EP (1) EP1792860B1 (fr)
AT (1) ATE524608T1 (fr)
CA (1) CA2569924C (fr)
DE (1) DE102005057426A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI116229B (fi) * 2004-04-29 2005-10-14 Metso Paper Inc Sivuohjauksella varustettu alipainehihnakuljetin rainanmuodostuskonetta varten
US9029731B2 (en) 2007-01-26 2015-05-12 Electro Scientific Industries, Inc. Methods and systems for laser processing continuously moving sheet material
US8398063B2 (en) * 2008-12-10 2013-03-19 Gross International Americas, Inc. Ribbon transport apparatus and method
US8388246B2 (en) * 2009-09-15 2013-03-05 Xerox Corporation Web driven vacuum transport
US9944037B2 (en) * 2011-05-12 2018-04-17 Pouch Pac Innovations, Llc Apparatus for simultaneously separating a plurality of pouches, transferring the pouches and method of same
DE102016222201B4 (de) * 2016-11-11 2021-10-21 Koenig & Bauer Ag Fördervorrichtung
DE102017200260B4 (de) * 2017-01-10 2021-05-12 Koenig & Bauer Ag Fördervorrichtung
CA3059634A1 (fr) 2017-04-13 2018-10-18 Senti Biosciences, Inc. Immunotherapie anticancereuse combinatoire
DE102017215374B4 (de) * 2017-09-01 2021-04-29 Koenig & Bauer Ag Fördervorrichtung
US11420880B2 (en) 2017-10-18 2022-08-23 Oldcastle Infrastructure, Inc. Stormwater filtration system with internal bypass pipe
US11419898B2 (en) 2018-10-17 2022-08-23 Senti Biosciences, Inc. Combinatorial cancer immunotherapy
CA3116138A1 (fr) 2018-10-17 2020-04-23 Senti Biosciences, Inc. Immunotherapie anticancereuse combinatoire

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3524006A1 (de) * 1984-07-05 1986-02-06 Valmet Oy, Helsinki Vorrichtung in einer papiermaschine zum transport und zur fuehrung des bahnendauffuehrungsbandes
EP1063188A2 (fr) * 1999-06-25 2000-12-27 Voith Paper Patent GmbH Convoyeur à vide
EP1127978A2 (fr) * 2000-02-26 2001-08-29 Voith Paper Patent GmbH Convoyeur à bande avec aspiration
DE10009188A1 (de) * 2000-02-26 2001-08-30 Voith Paper Patent Gmbh Vakuum-Bandfördervorrichtung
DE29924658U1 (de) * 1998-09-29 2004-08-26 Metso Paper, Inc. Vorrichtung zum Befördern und Führen eines Einführstreifens einer Bahn bei einer Papiermaschine

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Publication number Priority date Publication date Assignee Title
US3763571A (en) * 1970-04-27 1973-10-09 Vits Maschinenbau Gmbh Apparatus for contactless guiding of webs
US3889801A (en) * 1972-10-26 1975-06-17 Bell & Howell Co Vacuum conveyor belt with air bearing
US4542842A (en) * 1983-10-31 1985-09-24 Crown Zellerbach Corporation Pneumatic conveying method for flexible webs
US4551203A (en) * 1984-04-02 1985-11-05 Valmet Oy Method and arrangement for guiding a paper web from the press section to the drying section
DE19601989C2 (de) * 1996-01-20 2002-01-31 Voith Paper Patent Gmbh Anordnung zum Führen einer Materialbahn
DE19929018A1 (de) 1999-06-25 2000-12-28 Rovema Gmbh Vorrichtung zum Verpacken
DE20001082U1 (de) * 2000-01-22 2000-04-13 Langbein & Engelbracht Gmbh Anordnung zur Führung einer flexiblen Materialbahn
FI118017B (fi) * 2004-03-11 2007-05-31 Metso Paper Inc Alipainehihnakuljetin päänvientinauhan viemiseksi rainanmuodostuskoneessa

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3524006A1 (de) * 1984-07-05 1986-02-06 Valmet Oy, Helsinki Vorrichtung in einer papiermaschine zum transport und zur fuehrung des bahnendauffuehrungsbandes
DE29924658U1 (de) * 1998-09-29 2004-08-26 Metso Paper, Inc. Vorrichtung zum Befördern und Führen eines Einführstreifens einer Bahn bei einer Papiermaschine
EP1063188A2 (fr) * 1999-06-25 2000-12-27 Voith Paper Patent GmbH Convoyeur à vide
EP1127978A2 (fr) * 2000-02-26 2001-08-29 Voith Paper Patent GmbH Convoyeur à bande avec aspiration
DE10009188A1 (de) * 2000-02-26 2001-08-30 Voith Paper Patent Gmbh Vakuum-Bandfördervorrichtung

Also Published As

Publication number Publication date
DE102005057426A1 (de) 2007-05-31
ATE524608T1 (de) 2011-09-15
CA2569924A1 (fr) 2007-05-30
US20070119895A1 (en) 2007-05-31
EP1792860A3 (fr) 2009-03-11
EP1792860B1 (fr) 2011-09-14
US7625465B2 (en) 2009-12-01
CA2569924C (fr) 2013-12-24

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