• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Dedusting system for installation on a paper machine or the like or on its finishing system, which dedusting system (5, 15) comprises the following - an elongated frame part (11) which has a surface (11 ') and a lower surface (11' '), as well as side surfaces (11 '' '), - parallel, elongated blowing and suction slots (8, 9) arranged on the frame part (11), the surface of the frame part (11) between them being provided for a guide surface (10) for guiding the from the Blow slot (8) to form exiting blow, - arranged on the frame part for the supply air nozzle to bring the blown air into the blow slot and for the exhaust air nozzle to divert the air through the suction slot, where - the guide surface (10) the straight part comprises between the blowing slot (8) and the suction slot (9) which is arranged to be bent at the edge on the side of the suction slot (9) in the direction of the suction slot (9), the guide surface (10) being arranged et is to guide the air emerging from the blow slot (8) into the suction slot (9).
    公开号:AT17128U1
    申请号:TGM50112/2020U
    申请日:2020-05-26
    公开日:2021-06-15
    发明作者:
    申请人:Valmet Technologies Oy；
    IPC主号:
    专利说明:

    description
    DUST COLLECTION SYSTEM
    The invention relates to a dedusting system for installation in a paper machine or the like or in its finishing system. In particular, the subject matter of the invention is a device according to the preamble of claim 1.
    On paper machines, a boundary layer of air arises on the surface of the web, which entrains the small particles or dust released from the web. Dust formation can be a particular problem in the manufacture of paper grades that contain significant amounts of inorganic fillers that can detach from the paper web and form fine dust, but in the manufacture of other paper and cardboard grades, the surface of the web, for example, foreign objects, Have fibers and / or fiber fragments that do not adhere to the structure of the web, but form dust running with the boundary layer. In the manufacture of types of tissue, dust formation problems occur, in particular, when scraper creeping, the web being detached from the surface of the Yankee cylinder with the scraper, dust being detached from the web which is carried along by the web as it continues and spreads into the environment.
    The existing on the surface of the paper / cardboard and dissolved dust causes problems in the production of paper and cardboard, especially on the winder, and soiling of the devices. The detaching dust can also cause problems during further processing, for example during printing, in which the dust detached from the paper can contaminate parts of printing machines. In the worst cases, the dust loosened from the paper / cardboard can pose an occupational health risk.
    Several solutions have been presented to reduce the dust nuisance. An effective solution has been presented in Finnish patent publication FI 104099.
    The object of the present invention is to further develop known solutions of the, and to enable a more compact solution than before, which is suitable for (re) installation even in very narrow positions on a paper / board machine.
    Another purpose of the invention is to create a dedusting system with which the dust can be removed from the surface of the web effectively and functionally.
    A further purpose of the invention is to provide a solution which is simple and which reduces the runnability problems associated with dedusting.
    The above-described goals and possible later occurring goals can be achieved with the invention defined in the characterizing part of the independent claim. Some advantageous embodiments are described in the dependent claims.
    [0009] A typical dedusting system according to the invention attached to a paper machine
    machine or the like or to be installed on your finishing line
    - An elongated frame part, which comprises a surface and a lower surface, as well as these connecting side surfaces,
    - Elongated blowing and suction slots arranged on the frame part, between which the surface of the frame part is intended to form a guide surface for guiding the blowing out of the blowing slot,
    - Bushings arranged on the frame part for the supply air nozzles in order to bring the blown air into the blowing slot and for the exhaust air nozzles in order to discharge the air via the suction slot, characterized in that
    the guide surface comprises the straight part between the blowing slot and the suction slot which is arranged to be bent at the edge on the side of the suction slot in the direction of the suction slot, the guide surface being arranged to guide the blow emerging from the blowing slot into the suction slot.
    Now it has surprisingly been found that the guide surface of the dust extraction system can be arranged so that the blow emerging from the blow slot can be guided into the suction slot as free of eddy currents as possible, with the dust removal performance at least the same or even improved. At the same time, the function of the dedusting system is simplified, and there is no need for a support surface to be arranged on the other side of the web, such as a support roller to compensate for the path of the web. With the dedusting system corresponding to the invention, a uniform blowing can be generated and better control of the path can be made possible without additional devices or arrangements
    The dust collector according to the invention can be built into a paper machine or the like, or it can be built into the finishing line of a paper machine or the like. One or more dedusting systems corresponding to the invention can particularly advantageously be installed on the winder, for example after the blades of the winder in front of the reeling unit.
    The dedusting system comprises an elongated frame part which comprises a surface and a lower surface, as well as side surfaces connecting these. The lower surface of the dust collector is arranged in the direction of the web. The frame part of the dedusting system is advantageously arranged to extend from the first edge of the web to be processed to the other edge, that is to say essentially over the entire width of the web. The length of the frame part thus generally corresponds to the width of the web. The width of the frame part of the dust extraction system is perpendicular to the length of the frame part and parallel to the running direction of the web.
    On the frame part of the dust extraction system, an elongated blowing slot and an elongated suction slot are arranged, which extend from the first end of the frame part to the other end. The blowing slot and the suction slot are parallel and are arranged on the lower surface of the dust extraction system at a distance from one another. The distance between the blow slot and the suction slot can be 30-100 mm, advantageously 40-80 mm. In the running direction of the web, the suction slot is arranged in front of the blow slot, that is, it can be assumed that the suction slot is arranged in the area of the front edge of the lower surface of a dedusting system.
    The surface of the frame part between the blow slot and the suction slot is arranged to form a guide surface for guiding the blow emerging from the blow slot. The guide surface comprises a straight part which advantageously extends from the blow slot to the edge of the suction slot on the suction slot side of the guide surface, which edge is arranged to be bent towards the suction slot. The length of the straight part can be 20-70 mm, preferably 30-50 mm. The straight part of the guide surface is generally essentially flat, and in particular the guide surface does not have any projections or corresponding ones that could interfere with the course of the path. With the help of the straight guide surface, it can be ensured that the blowing out of the blowing slot is guided as evenly as possible into the suction slot, without the formation of excessive eddy currents. With the bend of the guide surface on the side of the suction slot, the guidance of the blow into the suction slot can be ensured. The radius of the arch can be, for example, 10-50 mm.
    With the blow slot present on the dust extraction system, a blow can be arranged, the speed of which can be 40-120 m / s, preferably 60-90 m / s. The opening of the blow slot can typically be 0.5-1.5 mm, preferably 0.8-1.2 mm. The opening here means the dimension of the blow slot in the width direction of the frame part. As the blow slot becomes larger, the amount of movement produced by the blow is increased, allowing the dust collector to be placed further away from the web surface, thereby better avoiding the risk of the dust collector accidentally touching the web surface. Typically the dedusting system comprises only one blow slot which is arranged to blow in the direction of the suction slot, that is to say
    against the direction of travel of the web. Typically the blow slot is arranged to form the blow at an angle of 35-55, preferably 40-50 degrees against the direction of travel of the web.
    According to one embodiment of the invention, the opening of the blow slot can be arranged to be adjustable. The opening of the blow slot can easily be adjusted in the running direction of the web with regulating devices, which are arranged, for example, on the side surface of the frame part of the dedusting system, such as, for example, with adjusting screws. This enables the opening of the blowing slot to be continuously adjusted, whereby the power of the solution blowing of the dust can be regulated easily and effectively according to the type of paper / cardboard to be driven.
    The opening of the suction slot arranged on the frame part of the dust extraction system can be 30-50 mm, preferably 35-45 mm. The opening of the blow slot here means the dimension of the blow slot in the width direction of the frame part. In an advantageous embodiment of the invention, a flow limiter is arranged on the suction slot. The flow limiter can be formed, for example, by a perforated plate, which can be provided to cover the opening of the suction slot, in that the perforated plate functions as a kind of throttle element, the vacuum generated by the suction slot and the course of the path being significantly more uniform. Of the area of the perforated plate, at least 30%, preferably at least 40%, most preferably approx. 50%, could be arranged in an open manner. In one embodiment, the openness of the perforated plate can be made variable, that is, the openness of the perforated plate is different at different points. The perforated plate can be arranged in a bending manner on the side surface (front surface) of the frame part, the lower part of the side surface being formed by the perforated plate. Air can thus also be sucked into the suction slot from the front edge of the frame part, which further improves the evenness and controllability of the web movement. Typically, about 10-35 mm, preferably 20-30 mm, are made from a perforated plate from the lower edge of the side surface of the frame part. The perforated plate can be arranged obliquely on the suction slot, that is, the first side of the perforated plate is arranged on the lower edge of the side surface closer to the virtual plane defined by the guide surface than the other side of the perforated plate.
    In one embodiment of the invention, an elongated recess can be arranged on the edge of the guide surface on the side of the blow slot. The recess is arranged in the immediate vicinity of the blow slot, and the length corresponds essentially to the length of the blow slot, that is to say the recess advantageously extends from the first end of the frame part to the other end. The depth of the recess can be 3 - 8 mm, and the purpose is to reinforce the conduction of the blow in the desired manner from the blow slot into the area between the dust collector and the web.
    One or more partition walls can be arranged in the frame part. At least one partition wall is advantageously arranged in the frame part in order to separate the supply air and exhaust air side, for example suction and blow channels in the frame part of the dust removal system.
    On the outer surface of the frame part, necessary feedthroughs for the supply air nozzle can be arranged in order to bring the blown air into the blow slot and for the exhaust air nozzle in order to divert the air through the suction slot. Typically, the dedusting system comprises several supply air nozzles and several exhaust air nozzles, which are arranged evenly along the length of the frame part of the dust collecting system.
    In an advantageous embodiment of the invention, the feedthroughs for the supply air connection and exhaust air connection are arranged on the same outer surface of the frame part. It enables the dedusting system to be adapted more easily, even in tight spaces, since the nozzles are only arranged on one surface of the frame part, which reduces the need for space around the system. If the ducts for the supply air connection and exhaust air connection of the dust extraction system are arranged on the same surface of the frame part, the necessary ducts for the supply air and exhaust air connection are arranged on the intermediate wall located in the frame part. On request, the ducts for supply air and exhaust air nozzles can be added
    different outer surfaces of the dust extraction system and / or be arranged at the ends of the frame part of the dust extraction system.
    In a very advantageous embodiment, the exhaust duct guided in the frame part is shaped so that the flow arranged in the duct is essentially free of eddies. Thus the dust to be sucked from the surface of the web is conveyed in a straight line in the channel.
    According to one embodiment, the side wall is supported on the side of the frame part on the intermediate wall with support elements, for example with support sleeves. In this way, the required robustness and dimensional stability of the frame part of the dedusting system can be ensured even under difficult process conditions.
    The dust collector can be attached to a paper machine, a board machine or a finishing line on structures already in place. The dedusting system can, for example, be attached to the crossbar of the winder with suitable support elements. The dedusting system can advantageously be attached at a distance of 6-15 mm from the track. The dedusting system can be arranged at a small angle of at most 5 degrees, on the straight run of the web, whereby it can be assumed that the blowing out of the blowing slot blows into a closing gap between the edge on the side of the suction slot the dust collector and the web.
    In an advantageous embodiment, the dedusting system is arranged on the first side of the web without a support element, such as a roller or the like, being arranged on the other side of the web. The dedusting system corresponding to the invention enables a uniform course and good controllability of the web, with one side of the web on the dedusting system being able to be free of support elements. Thus, space required on a paper machine or on a finishing line can be saved. If desired, the support element, such as for example a support roller or a further dedusting system, can be arranged on the other side of the web in order to generate a support and / or to increase the dedusting.
    In the following the invention is explained in more detail with reference to the schematic figures of the accompanying drawings, to which, however, the invention is in no way to be strictly limited.
    Fig. 1 shows an example of a device according to the invention placed on a finishing line,
    Fig. 2 shows as a cross-section an example of a dedusting system corresponding to the invention, seen parallel to the longitudinal axis of the device, and
    Fig. 3 shows an example of a dedusting system according to the invention.
    In Fig. 1 an example of a device corresponding to the invention is shown arranged on the finishing system. In FIG. 1, the paper web 1 or, accordingly, is rolled up from the machine reel 2 onto the customer reel 3. The paper web is arranged to run, guided by support and deflection rollers 30, over the roll cutting unit 4, the web being cut to the width desired by the customer. On the path of the paper web 1, dedusting units 5, 5 'corresponding to the invention are also arranged, which are arranged on both sides of the web 1 in order to remove dust or the like that has been loosened from the surface of the web 1. It should be noted that the dedusting unit 5 can be adjusted into a very narrow space in the vicinity of the roll cutting unit 4 and the dedusting unit 5 'can be arranged freely without a supporting element, such as a roller, required on the other side of the web 1. The dedusting units according to the invention can thus be arranged better and more freely than before in fairly narrow spaces in the finishing units.
    In the running direction of the web 1 on the second dedusting unit 5 ’, an air nozzle 6 for the supply air or exhaust air, which is guided to the dedusting unit 5’, is shown schematically
    is connected to the air distribution or discharge pipe 7. It is clear that a plurality of air nozzles 6 are generally arranged on the dedusting unit 5 ° both for the supply air and for the exhaust air. For the sake of clarity, only one nozzle is shown in FIG. 1.
    In the inset A of FIG. 1, an alternative is shown in simplified form, in which the dedusting units 5, 5 'are arranged opposite one another on both sides of the web 1 when the web 1 is rolled up from the machine reel 2 onto the customer reel 3 . For the sake of clarity, other devices, support and deflection rollers and others arranged on the course of the web 1 are not shown.
    Fig. 2 shows an example of a dedusting system according to the invention. The dedusting system 15 comprises a frame part 11, which is typically made of a suitable metal. The frame part 11 comprises the surface 11 "and lower surface 11", as well as side surfaces 11 "". An intermediate wall 12 is arranged in the frame part 11 in order to separate the air inlet side and the air outlet side of the dedusting system 15 from one another.
    On the lower part of the frame part 11, on the lower surface or lower surface 11 ″, a blow slot 8 and a suction slot 9 are arranged. The lower surface 11 'of the frame part 11 between the blow slot 8 and the suction slot 9 is intended to form a guide surface 10 for guiding the blow emerging from the blow slot 8. The guide surface 10 comprises the straight part between the blowing slot 8 and the suction slot 9, which is provided to bend at the edge of the suction slot 9 in the direction of the suction slot 9. In this way, it can be achieved that the guide surface 10 effectively guides the air blown out of the blow slot 8 into the suction slot 9 without the formation of excessive eddy currents. With the pillars shown in Fig. 2, the exiting from the blowing slot 8 and the air flow guided into the suction slot 9 is described, it being possible to see how the shape of the guide surface 10 directly integrates the blowing between the dedusting system 15 and the web 1 Controls the direction of the suction slot 9 and at the same time, however, effectively removes the dust from the surface of the web 1 and from the layer of air guided with the surface.
    In Fig. 2, a flow limiter 13 is arranged on the suction slot, which has been formed by a perforated plate. The perforated plate functioning as a flow limiter 13 is intended to bend onto the side surface 11 "" of the frame part 11 (in the running direction of the web on the front surface), forming the lower part of the side surface 11 "" of the frame part 11. Air can thus also be sucked into the suction slot 9 from the front edge of the frame part 11, which significantly improves the evenness and controllability of the course of the web 1. The side wall 11 "" of the frame part 11 on the side of the suction slot 9 can be supported on the intermediate wall 12 with support elements 14, for example with support sleeves.
    The opening of the blow slot 8 can be made adjustable. FIG. 2 shows how the opening of the blow slot 8 can be adjusted with adjusting elements 16, such as adjusting screws, which control elements are arranged between the side surface 11 ″ of the frame part 11 and the partition 12. By tightening the adjusting element 13, the side surface 11 ° ”of the frame part 11 is arranged closer to the intermediate wall 12, the opening of the blow slot 8 becoming smaller. Correspondingly, by loosening the adjusting element 16, the distance between the side surface 11 '' and the partition wall 12 increases, as does the opening of the blow slot 8.
    In Fig. 2, alternative solutions for the arranged in the frame part 11 supply air nozzles 17, 17 ', exhaust air nozzles 18, 18' and their passages are described schematically with dashed lines to direct the blown air into the blow slot 8, and to the Exhaust air connection to divert the air through the suction slot 9. The supply air nozzles 17, 17 'are therefore alternative solutions to one another, as are the exhaust air nozzles 18, 18' are alternative to one another. The necessary lead-throughs for the supply air and exhaust air nozzles can be arranged on the partition wall 12, as shown, for example, with the reference numeral 19. If nozzles, pipelines and the like to be arranged in the frame part 11 of the dust extraction system are to be avoided, the supply air sockets and exhaust air sockets arranged on different sides of the frame part 11, for example the supply air socket 17 'and the exhaust air socket 18, can be selected.
    In Fig. 3 an example of a dedusting system corresponding to the invention is shown. The supply air connection 17 and exhaust air connection 18 of the dust extraction system 15 are arranged on the surface 11 'of the frame part 11. The supply air flows and exhaust air flows to the nozzles 17, 18 are shown in Fig. 3 with pillars, the direction of each arrow indicating the direction of the flow. In Fig. 3 it is easy to see that if the supply air connection 17 and exhaust air connection 18 are arranged on the same outer surface of the frame part 11, the space required for the dedusting system 15 is significantly less, which makes it possible to adapt the tray to a paper machine and / or a Finishing line facilitated. In FIG. 3, a dashed line also shows the possibility of attaching the supply air nozzle to the first and / or other end of the dust extraction system.
    The invention has been presented above only with reference to some of its advantageous applications, to the details of which the invention is not limited, but many versions and variations are possible within the scope of the inventive sense shown in the claim.
    权利要求:
    Claims (10)
    [1]
    1. Dedusting system for installation on a paper machine or the like or on its finishing system, which dedusting system (5, 15) comprises the following
    - an elongated frame part (11), which comprises a surface (11 ’) and a lower surface (11”), as well as side surfaces (11 ’”),
    - Parallel, elongated blowing and suction slots (8, 9) arranged on the frame part (11), the surface of the frame part (11) being provided between the same for a guide surface (10) for guiding the blowing out of the blowing slot (8) to build,
    - Bushings arranged on the frame part for the supply air nozzles in order to bring the blown air into the blowing slot and for the exhaust air nozzles in order to divert the air via the suction slot, characterized in that
    - the guide surface (10) comprises the straight part between the blow slot (8) and the suction slot (9) which is arranged to be bent at the edge on the side of the suction slot (9) in the direction of the suction slot (9), the guide surface (10) is arranged to guide the blowing out of the blowing slot (8) into the suction slot (9).
    [2]
    2. Dedusting system (5, 15) according to claim 1, characterized in that a flow limiter (13) is arranged on the suction slot (9).
    [3]
    3. Dedusting system (5, 15) according to claim 2, characterized in that the flow limiter (13) is formed by a perforated plate which is arranged to bend onto the side surface (11 '”) of the frame part (11).
    [4]
    4. dedusting system (5, 15) according to claim 1, 2 or 3, characterized in that the opening of the blowing slot (8) is arranged to be adjustable.
    [5]
    5. dedusting system (5, 15) according to any one of claims 1-4, characterized in that a recess is arranged on the edge of the guide surface (10) on the side of the blow slot (8).
    [6]
    6. dedusting system (5, 15) according to any one of claims 1 - 5, characterized in that an intermediate wall (12) is arranged in the frame part (11) in order to separate the supply air and exhaust air side of the dedusting system (5, 15) from one another .
    [7]
    7. Dedusting system according to one of claims 1 - 6, characterized in that the supply air nozzle (17) and exhaust air nozzle (18) are arranged on the same outer surface of the frame part (11).
    [8]
    8. dedusting system (5, 15) according to claim 7, characterized in that bushings for the supply air or exhaust air nozzle are arranged on the intermediate wall.
    [9]
    9. dust removal system (5, 15) according to any one of claims 5 - 8, characterized in that the side wall (11 '' ') of the frame part (11) on the side of the suction slot (9) with support elements (14) to an intermediate wall, for Example with support sleeves, is supported.
    [10]
    10. dedusting system (5, 15) according to any one of claims 1 - 9, characterized in that the blow slot (8) is arranged to form blowing at an angle of 30 - 55 degrees against the direction of travel of the web (1).
    For this purpose 2 sheets of drawings
    类似技术:
    公开号 | 公开日 | 专利标题
    DE3218306C2|1986-12-11|Separating and guiding device for a lead-in strip separated from a paper web end for transferring a paper web
    DE2917765C2|1982-07-15|Nozzle for a flotation dryer
    EP0787854A1|1997-08-06|Device for guiding a fibrous web in a single wire draw drying section
    DE3910600C2|1993-10-07|One-sieve dryer group
    EP2885455A1|2015-06-24|Suction roll for a machine for producing and/or processing a paper, cardboard or tissue web
    EP2885456A1|2015-06-24|Sealing strip
    DE102008000133A1|2009-07-30|drying section
    AT17128U1|2021-06-15|DUST COLLECTION SYSTEM
    EP1285991A2|2003-02-26|Device for treating a fibrous web
    EP1285992B1|2007-09-26|Device for treating a fibrous web
    WO2014026869A1|2014-02-20|Sealing device and roll with a sealing device
    WO2009065433A1|2009-05-28|Method and device for transferring a paper web from a supporting woven fabric to another
    EP0640716A2|1995-03-01|Arrangement for guiding a fibrous web in a dryer
    EP1048780A2|2000-11-02|Press section
    DE19639539A1|1998-04-02|Paper feed guides for copier, printer
    DE102004036845A1|2006-03-23|Boundary layer air seal for moving dry web of paper, tissue paper or carton has parallel transverse array of brushes
    EP1884589B1|2012-11-21|Stationary suction device, application and machine for manufacturing fibrous sheets with such a suction device
    AT410684B|2003-06-25|THREADING DEVICE AND METHOD FOR THREADING THE END OF A TRAIN
    DE102009027608A1|2011-01-13|Dryer for drying a paper-, cardboard- or another fibrous material sheet in a machine for their manufacturing, has two dryer groups, in which fibrous material sheet is supported by continuously circulating dryer strip
    EP2135994A2|2009-12-23|Method and device for transferring a material web
    DE202021104720U1|2021-11-11|Web cleaning device for cleaning a web
    DE102013218464A1|2014-09-18|Stationary suction device
    DE102019126591A1|2021-04-08|Device and method for applying process air
    DE102018219289B3|2019-12-05|Method and device for loading a material web with a gas stream
    WO2008015043A1|2008-02-07|Coating device
    同族专利:
    公开号 | 公开日
    DE202020102953U1|2020-06-02|
    FI12484U1|2019-10-15|
    CN213495360U|2021-06-22|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3078496A|1960-10-04|1963-02-26|Oxy Dry Sprayer Corp|Web cleaning apparatus|
    EP0646422A1|1993-10-01|1995-04-05|James River Corporation Of Virginia|Web cleaner apparatus and method|
    WO1996007490A1|1994-09-06|1996-03-14|R. Schneider Consulting & Development|Removing dust particles from a relatively moving material web|
    US6148831A|1996-10-25|2000-11-21|Valmet Corporation|Method for cleaning a web|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FIU20194082U|FI12484U1|2019-06-13|2019-06-13|Dust-capturing device|
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