• 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:
    The invention relates to a web threading arrangement for a fiber web machine. To the Aufführanordnung include Aufführflächen (10), on each of which one for transporting the Aufführstreifens (12) serving Aufführblasvorrichtung (11) is directed. The arrangement is arranged so that at two successive Aufblasblasstellen (11) of the deflection angle ß between the average direction of movement of the Aufführstreifens (12) on the first Blasstelle (13) and the Aufführstreifen-direction of movement, by the second Blasstelle (14) formed stop (15) is defined, 10 - 70 °, preferably 30 - 60 °. The invention also relates to a sliver separating device for a fiber web machine.
    公开号:AT511493A2
    申请号:T627/2012
    申请日:2012-05-29
    公开日:2012-12-15
    发明作者:
    申请人:Metso Paper Inc；
    IPC主号:
    专利说明:

    The subject matter of the invention is a web threading arrangement intended for a fiber web machine, which comprises threading surfaces, on each of which a blowing stream serving to transport the threading strip is directed. The invention also provides a sliver separating device for a fiber web machine.
    In the fiber web machine various devices are used for transporting and guiding the Aufführstreifens based on Aufführblasen, hereinafter also called short bubbles. There are so-called blown sheets, whose function is also based on the Aufblasblasen. The blower sheet has a baffle as a guide surface, and bubbles directed toward the baffle cause a vacuum effect due to the so-called Coanda effect. In other words, the Aufführstreifen strives to follow the Aufführfläche the blower while at the same time running in Aufführstreifen-transport direction blowing streams weiterführport the Aufführstreifen. Usually the blast streams consist of air streams. Aufführflächen are also present on the Aufführstreifen-separating device, which is thus a part of the Aufführanordnung.
    Despite a variety of Aufführblasvorrichtungen and surfaces and their modifications, the reliability of performing has been unsatisfactory in the known Aufführanordnung. In practice, the leader strip flips off the leader surface and remains only sporadically under the control of the blower blade. In other words, the Aufführstreifen is detached from the Blasblechoberfläche, then flows laterally between the Aufführstreifen and the blower replacement air. The Aufführstreifen thereby dissolves more easily from the surface of the baffle and thereby exacerbates the flutter problem, which lead to tearing or slipping of the leader strip from the baffle • · * * can. The problem also limits the geometry of the performances to be realized with tuyeres and, in conjunction with the separator, the end of the severed tread strip undevidently advances, thereby worsening the accuracy of the following performance means and hence the likelihood of track performance.
    Object of the present invention is to provide for a fiber web machine a new Bahnaufführanordnung in which the Aufführstreifen better than before remains under control, the Bahnaufführen can be performed with a smaller number of components than before and the Aufführgeometrie is arbitrary. The object of the invention is also to provide for a fiber web machine, a novel stripper-separating device with which the Aufführstreifen can be cut reliably and in a more versatile way than before. The characterizing features of this invention track Aufführanordnung consist in that it is designed so that at two successive Aufführblasstellen the deflection angle ß between the average direction of movement of the Aufführstreifens at the first Blasstelle and the Aufführstreifen-direction of movement, determined by the stop formed by the second Blasstelle is 10 to 70 °, preferably 30 to 60 °. Accordingly, the characterizing features of the separation device according to the invention are that the separation device, pivoted in separation position, is set up so that at two successive Aufführblasstellen the deflection angle ß between the average direction of movement of the Aufführstreifens at the first bite site and the Aufführstreifen-direction of movement by the is determined by the second bite site formed stop is 10 - 70 °, preferably 30 - 60 °. Surprisingly, it has been shown, in conjunction with tests, how important a sufficiently small one may be: • ♦ 1 * * ·· * ν • · a · · > • * * • »* ♦ * * * • * * * ·» • II * · *
    Lead-in angle for the quick adoption of Äufführstreifens is. An already finished in the direction of Aufführfläche Aufführstreifen adheres to, so to speak, the Blasstrom, which calms the movement of the Aufführstreifens. As favorable, a special construction has been found in which the blowing takes place only on the rear part of the Aufführfläche. In this way one also achieves a smaller entry angle. At the same time, it has surprisingly been found that the leader strip remains in the blast stream handle, although the direction of travel of the leader strip changes radically behind the blow hole. In this case, the Aufführstreifen the web threading in general and also in connection with the separation device is constantly under control. This increases the speed of the Bahnaufführens, and the likelihood of success of Bahnaufführens grows enormously. At the same time, a particular web run geometry can be realized in a simpler manner than heretofore and without geometry limitations.
    The invention will be described in more detail below with reference to the accompanying drawings, which show some embodiments of the invention. Show it:
    Fig. 1a Fig. 2b Fig. 2a Fig. 2b Fig. 2c Fig. 3a Fig. 3b a according to the prior art Aufführanordnung in principle; a Aufführanordnung invention in principle; a prior art according to the separation device in principle; a first embodiment of the separation device according to the invention in principle; a second embodiment of the separation device according to the invention in principle; Fig. 2c corresponding. Separating device at the beginning of Bahnaufführens; the separating device of Fig. 3a in the cutting position. • 4 * * «
    Fig. 1a shows a part of a known web threading arrangement for a fiber web machine. The known web flow blowing streams are directed from the hub (i.e., the step) to the leader surface, said lip forming a surface other than the leader surface which can scour the leader strip thereby causing friction. The fiber web machines include, for example, the paper and board machines. To this Aufführanordnung here include Aufführflächen 10, and on each of these surfaces a Blasstrom 11 is directed to transport the Aufführstreifens 12. With the help of this blowing air streams serving the Aufführstreifen is to be brought to adhere to the Aufführfläche and further transported. However, problems have occurred with the prior art web threading assembly. The Aufführstreifen 12 follows the Aufführfläche 10 only inaccurate and flutters in an undefined manner, which is shown in Fig. La. Especially when the Aufführflächen form an angle with each other, the Aufführstreifen of the Aufführfläche and can even fall off this surface. This phenomenon causes a limitation of the geometry of the Bahnaufführanordnung. In other words, with the blower sheets, only straightforward performances could be realized. The same problem occurs when the leader strikes the leader at a large angle. In Fig. 2a-c, the rectangles represent air channels, from which the Blasluftströme exit to the Aufführfläche out. In Fig. La-b and 3a-b, the blown air streams are shown by arrows.
    Fig. Lb shows a part of the invention Bahnaufführanordnung, more precisely, two consecutively arranged Aufführflächen 10. According to the invention, the Bahnauf guide arrangement is so designed that at two successive blast streams / points 11 of
    Deflection angle ß between the average direction of movement of the Aufführstreifens 12 at the first Blasluftstrom and the stop formed by the second Blasluftstrom 14 15 certain direction of the Aufführstreifens 12 10 - 70 °, preferably 30 -60 °. The surprisingly sharp change in direction is possible because the Aufführstreifen is in the grip of Blasstromes and remains. Based on tests and calculations, two and a half times the force would be required in comparison with the situation before the blow-up blower stream downstream of the blow-up blower stream to cause the sliver strip to separate from the blower blower stream. Thus, despite the large deflection angle, the leader strip remains reliably in the grip of the blower stream. This also makes new Bahnaufführgeometrien possible. In practice, at the same time the number of blown sheets can be significantly reduced. When moving around a roller, for example, a change of direction of up to 180 ° is required. So far, you needed for eighteen blown sheets, now can do the same thing with only three blower plates.
    In addition to the deflection angle has been found in the invention Bahnaufführanordnung a second significant feature: If the deflection angle of the invention accordingly procure, so can be at each Blasstelle 11 of the Aufführfläche 10 and the average direction of movement of the Aufführstreifens 12 included entry angle α 15 ° or less , The leader then adheres to the blow stream and fluttering of the strip is avoided. The Aufführstreifen can hike a little when hitting the Aufführfläche, but snuggles quickly to the Blasstrom. Because of the slight " working " of the strip, the term average direction of movement is used here, although in Fig. 1b the leader strip has already tightened and runs straight from one blast point 11 to the other. In addition, the Aufführfläche be curved, so the inlet angle is determined very close to the blow hole. Is he liable
    AuffQhrstreifen to the blowing stream, the Aufführfläche can be dimensioned and designed freer than before. Adhesion of the leader strip is the safer the smaller the lead-in angle. Therefore, the lead angle or is preferably less than 10 °, more generally 0 - 15 °. If the blow hole is located at the end of the guide surface, the angle β is large and the angle α small. Hit the displacement of the blow hole more towards the center of the Aufführfläche down the angle ß decreases as the angle α increases. If the angle conditions are met, the track performing works as planned.
    Preferably, the Aufführblasstrom is directed almost parallel to the Aufführfläche as in Fig. Lb. The drawn angles α and β are angles between the threading strip and the threading surface, not angles between the blowing direction and the threading surface. In certain embodiments, the make-up blowing on a lug may work, especially if the blowing direction forms an angle with the tote face. Also, the effect of friction is less than usual when blowing occurs at the end of the tread. The approach also facilitates the incorporation of a hole in the Aufführfläche. In addition to the new angle design, the positioning of the blowing points was also rethought. In accordance with the invention, the bladder 11 serving for web threading, viewed in the running direction of the threading strip 12, essentially takes place in the end region 16 of the threading surface. In other words, it is advisable to place the blowing points 11 on the blower plates at the end of the guide surface 10 directly in front of the kink point, where the angle can therefore be, for example, 60 ° (FIG. 1b). Here Aufführflachen 10 are used, in which case the angle enclosed by the Aufführflachen almost corresponds to the deflection angle of the Aufführstreifens 12. However, the shape of the surface is more free than previously, provided that the applicable design conditions for the inlet and the deflection angle are met. The holding effect of the • · 7 «* • · *
    Aufblasblasens remains limited to a fairly short distance. In practice, the stop then also forms at the blowing stream and behind, but the transport effect extends over the entire length of the Aufführfläche. The transport effect is needed especially at the beginning of the track show, but the tail strip tightens quickly between the blowing points and moves straight forward. In practice, the effective length of the guide surface is 100-500 mm, preferably 200 -400 mm. If necessary, a blowing surface can also be assigned to a plurality of blowing points, but a sufficiently small lead-in angle is essential, thanks to which an effective hold is achieved. In addition, a surprisingly large deflection angle can be selected behind the bubbles directed onto the end region of the guide surface, which gives rise to the possibility of novel Aufführanordnungen.
    An essential part of the Bahnaufführen is the cutting of the Aufführstreifens at the beginning of Bahnaufführens. In Fig. 2a-2c, such a separator 17 is shown as part of the Aufführanordnung. Referring now to Figure 2a, a prior art sliver stripper for a fiber web machine is illustrated. The separating device 17 has guide surfaces 19, of which at least one is pivotable and provided with a separating element 18. For transporting the Aufführstreifens 12 is a blow stream 11 is directed to the Aufführfläche 12. The separating element 18 is shown in FIGS. 3a and 3b. Before the Aufführfläche 10 is the hold-blow device 20, which tightens the Aufführstreifen. At the beginning of web threading, the threading surface is pivoted, with the threading strip being generally severed at the knives (not shown) and thereafter forwarded. According to the prior art, the Aufführstreifen reaches at a large angle on the Aufführfläche, wherein the invention produced by the Aufführblasen stop is not given and the
    Slip strip detached from the guide surface. In practice, therefore, when pivoting the Aufführfläche the Aufführstreifen not in the grip of the blast streams. The Aufführblasstrom belonging to the separating element counter knife gets too high in the blown air flows of the Aufführfläche hovering Aufführstreifen too late to capture (Fig. 2a). In this case, the aiming accuracy is lost by guiding the Aufführstreifens, for example on a vacuum belt conveyor or in a rope scissors by spinning the Aufführstreifens.
    According to the invention, the separating device 17 is arranged so that, pivoted for cutting, with two blowing points 11 located one behind the deflection ß between the average direction of movement of the Aufführstreifens 12 at the first Blasstelle 13 and the stop 15 formed by the second Blasstelle 14 determined Movement direction of the leader strip 12 10 - 70 °, preferably 30 -60 °. In this case, a large deflection angle can be applied, so that the necessary change in direction is achieved by hold-down blowing 20 for Bahnaufführen. In Fig. 2b behind the hold-down blowing a short Aufführfläche is arranged, to which the pivotable Aufführfläche 19 connects. The counter knife of the separator has its own stationary Aufführfläche. In Fig. 2c, the pivotable Aufführfläche 19 is made in two parts, it being easy to achieve changes in direction of over one hundred degrees. Regardless of the number of Aufführflächen and -blasstellen the Aufführstreifen is conveyed straight and in a taut state from one Aufführblasstelle to 'other.
    In addition, the Aufführstreifen remains in the handle of the blowing stream, with the possibility of novel Aufführgeometrien given.
    In Fig. 3a-b, the construction and function of the separator 17 of Fig. 2c are shown in more detail. The pivotable Aufführfläche 19 is now formed by two provided with blowing points 11 Aufführflächen 10 which are pivotally connected to each other pivotally. In this way a big change of direction is achieved. The joints are represented by circles. In Fig. 3a, the hold-down blowing device 20 holds the leader strip 12 under control. At the beginning of Bahnaufführens the Aufführflächen are pivoted, and thereby the Aufführstreifen is severed. After cutting, the severed end of the Aufführstreifens is passed to the next Aufführmittel. In the embodiment shown, the guide surfaces 10 are also supported on a pivotally supported support member 21. The angle subtended by the guide surfaces will then always be the correct size, and the direction of the guide strip will change smoothly, i. continuously. In addition, this construction requires little mounting space. The latter Aufführfläche 10 is supported by sliding guides 22 on the support member 21, so that even with a short actuator / actuator 23, a large swing angle is achieved. Also, the separating element 18 is arranged on the support element 21, so that the Aufführflächen can be performed in lightweight construction. At one end of the support member 21 a belonging to the separation device knife 24 is arranged, the counter knife 25 is supported on the stiffening of the fiber web machine. On the counter knife may have its own Aufführfläche with blower, or immediately behind the counter knife, for example, a vacuum belt conveyor is arranged.
    The separation device according to the invention is simpler in construction and therefore less expensive than the previous separation devices. The separator works in all positions so that the strip is constantly under control. Even swivels of up to 120 ° are easy to handle, so the divider can be used in many different positions. In the two-part pivoting Aufführfläche the inlet and the deflection angle during the entire duration of the pivoting remain in the optimum range. In this case, the Aufführstreifen is despite the pivoting constantly in the grip of the blast streams. In particular, the cardboard strip, which is easily destroyed by flapping, can now be safely cut and transported intact over the entire performance track.
    权利要求:
    Claims (10)
    [1]
    1. For a fiber web machine certain Baßenaufführanordnung, the Aufführflachen (10), on each of which one for transporting the Aufführstreifens (12) serving blowing device (11) is directed, characterized in that the arrangement is designed so that in two successive the following blowing points / flows (11) the deflection angle β between the average direction of movement of the leader strip (12) at the first blow slot (13) and the leader strip movement direction determined by the stop (15) formed by the second blow slot (14) , 10-70 °, preferably 30-60 °.
    [2]
    2. Arrangement according to claim 1, characterized in that the inlet angle α is smaller than 10 °.
    [3]
    3. Arrangement according to claim 1 or 2, characterized in that at each Aufführblasstelle (11) of the Aufführfläche (10) and the average direction of movement of the Aufführstreifens (12) enclosed entry angle o is less than or equal to 15 °.
    [4]
    4. Arrangement according to one of claims 1 to 3, characterized in that the web serving for serving bubbles (11) viewed in the transport direction of the Aufführstreifens (12) substantially in the end region (16) of the Aufführflache takes place.
    [5]
    5. Arrangement according to any one of claims 1 to 4, characterized in that the length of the guide surface (10) 100 - 500 mm, preferably 200 - 400 mm.
    [6]
    6. A stripper separating device (17) for a fiber web machine, which comprises guide surfaces (19), at least one of which is pivotable and equipped with a separating element (18), and on which a blowing device (11) is provided for transporting the threading strip (12) ), characterized in that the separating device is designed so that, .Swenk in Durchtrennungsstellung, at two successive Aufführblasstellen (11) of the deflection ß between the average direction of movement of the Aufführstreifens (12) at the first Blasstelle (13) and the Aufführstreifen-direction of movement, which is determined by the formed by the second Blasstelle (14) stop (15) is 10 - 70 °, preferably 30 - 60 °.
    [7]
    7. Separating device according to claim 6, characterized in that the separating device (17) forms part of an arrangement according to any one of claims 2 to 4.
    [8]
    8. A separating device according to claim 6 or 7, characterized in that the pivotable Aufführfläche (19) consists of two Aufführblasvorriehtungen (11) provided with guide surfaces (10) which are pivotally hinged together.
    [9]
    9. Separating device according to claim 8, characterized in that the Aufführflächen (10) on a pivotally supported support member (21) are supported.
    [10]
    10. Separating device according to claim 9, characterized in that the separating element (18) is arranged on the supporting element (21). Vienna, May 29, 2012 Metso Paper, Inc. by:

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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
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    DE19803591A1|1998-01-30|1999-08-05|Voith Sulzer Papiertech Patent|Twin-wire former|
    CA2254319C|1998-11-18|2007-07-24|Paprima Industries Inc.|Directional tail transfer threading apparatus|
    FI115233B|2003-07-07|2005-03-31|Metso Paper Inc|Apparatus for conveying conveyor belts in paper machine|
    DE10346004A1|2003-10-02|2005-04-28|Voith Paper Patent Gmbh|Vacuum transport device, in particular as Materialbahneinfädeleinrichtung in a machine for producing or / and finishing a web|
    FI118774B|2006-06-07|2008-03-14|Metso Paper Inc|Method and apparatus for transferring paper or cardboard webs to a wreckage system in closed-web transfer concepts|
    FI124219B|2007-11-14|2014-05-15|Valmet Technologies Inc|Scraping apparatus for removing a threading strap from a moving surface with a fiber web machine|
    DE102008000745A1|2008-03-18|2009-09-24|Voith Patent Gmbh|Material web e.g. paper web, guiding device for paper or cardboard web winding machine of rotary slitting machine, has nozzles that are formed and arranged such that partial turbulent fluid flow is generated|SE538854C2|2014-01-09|2017-01-03|Valmet Oy|Wheelchair for receiving and rolling up a paper web, which comes from a drying cylinder in a paper machine, to a roll, as well as a paper machine using a wheelchair|
    CA2966775C|2014-11-05|2018-11-06|Voith Patent Gmbh|Air guide plate for leading away an edge strip of a material web, method for leading away an edge strip of the material web, and use of the air guide plate and of the method|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FI20115553A|FI125148B|2011-06-07|2011-06-07|Tip pulling device and cutting device for a feed tip for a fiber web machine|
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