• 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:
    SUMMARY The invention relates to a device for positioning an evacuation tube (1) in a steam-heated drying cylinder (3) of a paper machine where the drying cylinder (3) has a jacket (4), which on its inside (6) has circumferential grooves (7) for collection of condensate. The evacuation system (2) comprises an outlet part (10), which opens onto the outside of the drying cylinder (3) and a plurality of evacuation tubes (1), which are arranged in a plurality of axial groups and connected to the outlet part (10). The device according to the invention comprises a rudder positioner (12) which is arranged on a duck portion (13) of the evacuation tube (1), which duck portion (13) is bellows closest to the jacket (4). The rudder positioner (12) comprises a support body (15) which is designed to abut against a part of the inside of the jacket (4) in order to thereby support the evacuation tube (1). The support body (15) extends down to the bottom (8) of one of said circumferential grooves (7) so that the mouth (14) of the evacuation tube (1) stood at a predetermined distance from the bottom (8) of the groove (7). The invention also relates to a drying cylinder provided with the device according to the invention and a method for positioning an evacuation tube.
    公开号:SE1250486A1
    申请号:SE1250486
    申请日:2012-05-14
    公开日:2013-11-15
    发明作者:Johnny Aanerud
    申请人:Metso Paper Sweden Ab；
    IPC主号:
    专利说明:

    TECHNICAL FIELD The invention relates generally to a device for positioning an evacuation tube in an evacuation tube of an evacuation cylinder. The invention relates to a drying cylinder provided with an evacuation tube and a device for positioning the evacuation tube. Finally, the invention relates to a method for positioning an evacuation tube in a steam-heated drying cylinder.
    BACKGROUND OF THE INVENTION A paper machine normally contains one or more drying cylinders which are heated by steam. This is the case, for example, with tissue machines which often have a single steam-heated drying cylinder. In the case of tissue machines, the drying cylinder is often referred to as the "Yankee" or "Yankee cylinder". Such a steam-heated drying cylinder, for example a Yankee cylinder, normally has on its inside a number of circumferential grooves which are separated from each other by flanges or axes. When hot steam is supplied to the interior of the drying cylinder, the steam is condensed into liquid, whereby heat is transferred to the outer jacket of the drying cylinder. When a wet paper web comes into contact with the jacket of the drying cylinder, liquid in the paper web can evaporate so that the paper web dries. The flanges which between them form circumferential grooves on the inside of the drying cylinder contribute to improved heat transfer. When hot steam condenses inside the drying cylinder, liquid is formed which settles to the bottom of the surrounding grooves. That liquid collects the heat transfer and the condensed liquid (the water) must be evacuated from the inner groove of the drying cylinder. It is advantageous to arrange inside the drying cylinder an evacuation system for condensed water so that condensed water can be transported away from the interior of the drying cylinder. Such an evacuation system may comprise an outlet part arranged inside the drying cylinder and a plurality of evacuation tubes which communicate with the outlet part, a duct portion of the evacuation tube extending down into one of the circumferential grooves and having a mouth which can receive condensed liquid. The second end portion of the evacuation tube opens into the outlet part so that condensed water can be conveyed from the circumferential groove, through the evacuation tube and into the outlet part from which the condensed water can then be conveyed out of the drying cylinder. An example of such a known device is shown in, for example, publicly available Swedish patent application number 1000911-6. The outlet part and the evacuation tubes connected to the outlet part rotate with the drying cylinder during operation as the outlet part is directly or indirectly connected to the ends of the drying cylinder. The evacuation tubes will therefore be subjected to centrifugal forces which press their nearest mantle-covered duck portions outwards towards the inner surface of the jacket, the viii saga towards the bottom of the circumferential groove into which each evacuation tube originates.
    However, the mouth of the evacuation pipe should be at a certain distance from the bottom of the spar so that liquid can be evacuated as efficiently as possible from the bottom of the spar. In order to prevent the mouth of the evacuation pipe from standing at the bottom of a circumferential track, it has been proposed in Swedish patent application number 1000911-6 that a support body which is designed to rest on the top surfaces of two successive pipes be attached to the spirit of the evacuation pipe closest to the jacket. aces which aces between themselves delimit a circumferential spar. The support body provides that the evacuation tube so that the mouth of the evacuation tube will remain at a predetermined distance from the bottom of the circumferential groove, even when the evacuation tube is subjected to centrifugal forces. The support body shown in Swedish patent application number 1000911-6, however, presupposes a given radial distance between the bottom of the spar and the top of the aces (flanges). Different drying cylinders may have different designs of silk and different heights of the flange lasers between which the circumferential grooves run. The present invention therefore aims to provide a solution which can be used on tracks of different depths and which is easy to assemble.
    DESCRIPTION OF THE INVENTION The invention relates to a device for positioning an evacuation tube of an evacuation system, which evacuation system is arranged in a steam-heated drying cylinder of a paper machine. The drying cylinder has a jacket, which on its inside has circumferential grooves for collecting condensate, which is formed as a result of heat transfer through the jacket to its outside. The evacuation system comprises an outlet part which opens on the outside of the drying cylinder and a plurality of evacuation tubes, which are arranged in a plurality of axial groups and connected to the outlet part and the evacuation system is arranged to evacuate the condensate from the said cylinder of the drying cylinder. each evacuation tube comprises the device according to the invention a tube positioner which is arranged on a duck portion of the evacuation tube, which duct portion is coated closest to the jacket. The rudder positioner comprises a support body which is designed to abut against a part of the inside of the jacket in order to thereby support the evacuation tube. According to the invention, the support body is designed to extend down to the bottom of one of said circumferential grooves so that the mouth of the evacuation tube stood at a predetermined distance from the bottom of the groove. The support body may in certain embodiments have an inner passage which is arranged to cooperate with an outer passage on the evacuation tube.
    The positioning device may optionally further comprise a weldable connection connecting the evacuation tube to the outlet part. Said weldable connection is a hinge connection which defines a center of rotation for rotating the evacuation tube in at least one vertical plane in order to enable positioning of the evacuation tube in relation to the bottom surface of the spare.
    The invention also relates to a steam-heated drying cylinder for a paper machine, which drying cylinder comprises evacuation tubes and the device according to the invention for positioning an evacuation tube.
    The invention further relates to a method for positioning an evacuation tube of an evacuation system, which is arranged in a steam-heated drying cylinder of a paper machine, which drying cylinder has a jacket which on its inside has circumferential grooves for collecting condensate, which is formed as a result of heat transfer. through the jacket to its outside, which evacuation system comprises an outlet part which opens onto the outside of the drying cylinder and a plurality of evacuation tubes, which are arranged in a plurality of axial groups and connected to the outlet part, and which evacuation system is arranged to evacuate the condensate from the drying cylinder to the drying cylinder. outside means via said plurality of evacuation tubes and outlet part, which device for each evacuation tube comprises a tube positioner arranged on a duct portion of the evacuation tube, said duct portion being located closest to the jacket and the method comprising applying a tube positioner to a duct portion of the evacuation tube, and the rudder positioner comprises a support body which is designed for abutment against a part of the inside of the jacket to thereby support the evacuation tube, characterized in that the support body is designed to extend down to the bottom of one of said circumferential grooves so that the evacuation tube estuary was at a predetermined distance from the bottom of the save. 4 BRIEF DESCRIPTION OF THE FIGURES Figure 1 seematically shows a paper machine with a drying cylinder.
    Figure 2 shows, in cross section, a part of the jacket of a drying cylinder in which the invention is to be used.
    Figure 3 shows a view of a part of a drying cylinder where the end of the drying cylinder has been removed and where two evacuation tubes with positioning devices are seen.
    Figure 4 shows, in cross section, an evacuation rudder with a rudder positioner.
    Figure 5 shows, in cross section, the spirit of an evacuation rudder with associated rudder positioners.
    Figure 6 shows, in perspective, the spirit of an evacuation rudder with an associated rudder positioner.
    Figure 7 shows a view of a support body belonging to a rudder positioner. Figure 8 shows a cross section of the same support body as in Figure 7.
    Figure 9 shows, in cross-section, how a support body abuts against the bottom of a circumferential ridge.
    Figure 10 shows, in cross-section, how an evacuation pipe can be attached to the outlet part.
    DETAILED DESCRIPTION OF THE INVENTION Referring to Figure 1, there is shown a paper machine 100 in which the device of the invention may be used. The paper machine has a forming portion 110 where an inlet shield 120 is arranged to inject maid into a gap between two pads 130, 140. A fibrous web W is formed as supported by a padded 140 feed to a drying cylinder 3 which is anguppyarm. The fiber web W is dried as it follows the jacket of the drying cylinder 3 and the drying is effected by the jacket of the drying cylinder being hot so that water in the fiber web evaporates. After the fibrous web W has been dried on the drying cylinder 3, it can be removed from the drying cylinder 3 with a doctor blade 150 and rolled up on a wheelchair 160. The paper machine shown in Figure 1 may be a tissue machine for producing tissue, for example kitchen paper or toilet paper. can be applied awn in other contexts The drying cylinder 3 is heated by hot steam which is supplied to the inside of the drying cylinder 3. Referring to Figure 2, the jacket 4 of the drying cylinder 3 on its inside 6 is formed with circumferential grooves 7 separated by axes or flanges 9. The reference numeral 8 in Figure 2 refers to the very bottom surface of each groove 7. Through the flanges / axes the heat transfer is improved. When the drying cylinder 3 am / ands to dry a fibrous web, hot heat is supplied to the inside of the drying cylinder 3. The hot steam condenses on contact with the jacket 4 of the drying cylinder 3 and heat is transferred to the outside of the jacket 5. The condensate will settle in the circumferential grooves 7. in the jacket 4. When condensate settles in the circumferential grooves 7, this will collect the heat transfer and the condensate must therefore be deposited. The circumferential grooves 7 have a width A in the transverse direction of the machine. Referring to Figure 2, the width A is the same as the distance between two adjacent flanges 9. The width A of the groove 7 is often standardized. The flanges / asama 9 have a width B which is also often standardized. For many Yankee cylinders a standard is used where the width A of the silk 7 is 12 mm while the flanges / axes have a width B which amounts to 18 mm. The depth of the groove 7 can vary but is usually in the range 25 mm - 50 mm.
    Referring to Figure 3 and Figure 4, the invention relates to a device for positioning an evacuation tube 1 of an evacuation system 2. The evacuation system 2 is arranged in a steam-heated drying cylinder 3 of a paper machine. The drying cylinder 3 has a jacket 4, which on its inside 6 has circumferential grooves 7 for collecting condensate, which is formed as a result of heat transfer through the jacket 4 to its outside 5. The evacuation system 2 comprises an outlet part 10, which opens onto the outside of the drying cylinder 3. and a plurality of evacuation tubes 1, which are arranged in a plurality of axial groups and connected to the outlet part 10. The outlet part 10 may be designed as a tube or a drum which forms a channel through which liquid (condensate) can be transported. The evacuation system 2 is arranged to evacuate the condensate from the said groove 7 of the drying cylinder 3 to its outside via said plurality of evacuation tubes 1 and outlet part 10. The condensate is then sucked up from the bottom of each groove 7 and passed through the evacuation tube 1 into the outlet part 10 from which the condensate can be passed. the drying cylinder. As shown in Figure 3, the inventive device for each evacuation tube 1 comprises a tube positioner 12 which is arranged on a duct portion 13 of the evacuation tube 1, which duct portion 13 is coated closest to the jacket 4. Referring to Figure 4, the tube positioner 12 comprises a support body 15 which is designed for abutment against a part of the inside of the jacket 4 to thereby support the evacuation tube 1. The support body 15 is designed to extend down to the bottom 8 of one of said circumferential grooves 7 so that the mouth of the evacuation tube 1 is supported at a predetermined distance H from the groove. 7 bottom 8. The distance from the mouth of the evacuation tube to the bottom 8 of each groove 7 is thus independent of the height of the axes or flanges 9 which separate 6 different grooves 7 from each other. As a result, the device according to the invention can be used on different drying cylinders where the axes / flanges 9 have different heights.
    Referring to Figure 5, the support body 15 has a bottom surface 18 which is intended to form a contact surface against the bottom 8 of each circumferential groove 7. As shown in Figure 5, the support body 15 may have an inner passage 19 which is arranged to cooperate with an outer passage on the evacuation tube. 1. The support body 15 can then be screwed onto the spirit of the evacuation tube 1. The evacuation tube 1 can have a stop (not shown) so that the support body can only be screwed on to a certain distance. One can then determine exactly the distance from the support body even the bottom surface 18 to the mouth 14 of the evacuation tube 1.
    Referring to Figure 5, in some embodiments the support body 15 may have an additional through hole 31 which allows condensate (water) to pass through the support body in both directions.
    Figure 6 also shows in perspective the support body 15 illustrated in Figure 4 and Figure 5.
    Referring to Figures 7 and 8, a support body 15 with a slightly different design is shown in Figure 5 and Figure 6. Figure 7 shows a view of a support body 15 while Figure 8 shows a cross section of the same support body 15. The one shown in Figures 7 and 8 the support body 15 fulfills the same function as the support body 15 shown in Figures 5 and 6. As can be seen from Figures 7 - 10, the support body 15 has a through hole 21 so that the evacuation tube 1 can pass through the support body 15. The through hole 19 in the support body 15 has a inner passage 19 which can co-operate with an outer passage on the evacuation pipe 1. The support body 15 has side surfaces 16, 17 and the distance between the side surfaces 16, 17 is smaller than the distance between two adjacent axes / flanges 9 on the jacket 4 so that the support body 15 can be lowered into a circumferential groove 7 in the jacket 4 is not obstructed by the axles / flanges 9. As a result, the support body 15 can abut against the bottom 8 of a circumferential groove 7. The lower surface 18 of the support body 15 which is to abut against the bottom 8 of the spar 7 is preferably rounded so that the support body 15 can easily be adapted to abut against surfaces in different drying cylinders.
    The support body 15 has a width in the machine direction which is less than the width of the grooves 7. If the grooves 7 then have a width of 12 mm (the usual width of such grooves), the support body 15 must have a width which (in the transverse direction of the machine) is less than 12 mm. It is then to prefer that the difference is relatively small so that the support body 15 is only at night and generally so much narrower than the ridge 7 that it goes down into the ridge 7. If the ridge 7 has a width of 12 mm, the support body 15 can have a width which is in the range 10.0 mm - 11.9 mm or 11.0 mm - 11.9 mm. 7 As can be seen from Figure 9, the support body 15 can extend down to the bottom 8 of a circumferential groove 7. The mouth 14 of the evacuation tube 1 is then on a predetermined radial al / stand H from the bottom 8 of the groove (see also Figure 4). The evacuation tube 1 can then function effectively. The predetermined resistance H can in many practical embodiments be in the order of 4 mm - 12 mm or 4 mm - 9 mm. For example, the predetermined distance H may be 6 mm.
    With further male reference to Figure 3 and to Figure 6, a further aspect of the invention will now be explained. The positioning device further comprises a weldable connection 22 connecting the evacuation tube 1 to the outlet part 10, the weldable connection 22 being a hinge connection defining a center of rotation for rotating the evacuation tube 1 in at least one vertical plane to enable positioning of the evacuation tube 7 in relation to bottom 8. As shown in Figure 3, the weldable connection 22 may comprise a hinge body 23 attached to the evacuation tube 1. The hinge body 23 may be designed so that its shape is substantially spherical. Figure shows a part 25 which can be fixed in the outlet part 10 and possibly fixedly connected thereto. The part 25 has, as used against the hinge body 23, an inner contact surface with a shape corresponding to the substantially spherical shape of the hinge body 23. A fastening part 24 can be arranged to be fastened to the part 25, for example by means of cooperating passages on the two parts 25. respectively 24. The fastening part 24 also has an inner contact surface which corresponds to the spherical shape of the hinge body 23. In this way the fastening part 24 can be screwed together with the part 25 so that the hinge body 23 is held between the two parts. It will be appreciated that the hinge body 23 and the parts 24 and 25 form an articulated connection which allows rotation of the evacuation tube 1 so that the evacuation tube 1 can be adapted to drying cylinders 3 of different dimensions.
    It is understood that the invention also relates to a steam-heated drying cylinder for a paper machine which drying cylinder 3 comprises evacuation tube I and a device for positioning an evacuation tube 1 in the manner described above.
    The invention can also be defined in terms of a method for positioning an evacuation tube 1. The evacuation tube 1 then forms part of an evacuation system which is designed in the manner described above.
    The method then comprises placing a rudder positioner on a duct portion 13 of the evacuation tube 1, which duct portion 13 is located closest to the jacket 4 and which rudder positioner comprises a support body 15 which is designed to abut against a part of the inside of the jacket 4 to thereby support the evacuation tube. As described above, the support body 15 is designed to extend down to the bottom 8 of one of said 8 circumferential grooves 7 so that the mouth of the evacuation tube 1 was at a predetermined distance from the bottom 8 of the groove 7. In the method according to the invention it is thus ensured that the support body 15 is applied to the end portion 13 of the evacuation tube 1 so as to thereby ensure the correct distance between the mouth 14 of the evacuation tube 1 and the bottom 8 of the recess 7.
    It is understood that the method uses a support body 15 whose side surfaces 16, 17 are at a distance from each other which is less than the distance between two adjacent axes / flanges 9 so that the support body 15 is not obstructed by the axes 9.
    It will be appreciated that the rudder positioner 12 may in principle comprise more components than the support body 15 and that the support body 15 may be composed of several components.
    It will be appreciated that although the invention has been described above in terms of a positioning device, in terms of a drying cylinder and in terms of a method of positioning an evacuation tube, these categories only reflect different aspects of one and the same invention.
    It will be appreciated that condensate evacuation is suitably effected by negative pressure in the evacuation system (suction).
    权利要求:
    Claims (5)
    [1]
    Device for positioning an evacuation tube (1) of an evacuation system (2), which is arranged in a steam-heated drying cylinder (3) of a paper machine, which drying cylinder (3) has a jacket (4), which on its inside (6 ) has circumferential grooves (7) for collecting condensate, which are formed as a result of heat transfer through the jacket (4) to its outside (5), which evacuation system (2) comprises an outlet part (10), which opens onto the outside of the drying cylinder ( 3) and a plurality of evacuation tubes (1), which are arranged in a plurality of axial groups and connected to the outlet part (10), and which evacuation system (2) is arranged to evacuate the condensate from the said groove (7) of the drying cylinder (3) to its outside via said plurality of evacuation pipes (1) and outlet part, which device for each evacuation pipe (1) comprises a pipe positioner (12) arranged on a duck portion (13) of the evacuation pipe (1), which duck portion (13) is coated closest to the jacket (4). ) and which rudder positioner (12) comprises a support body (15) which is designed to abut against a part of the inside of the jacket (4) so as to thereby support the evacuation tube (1), characterized in that the support body (15) is designed to extend down to the bottom (8) of a of said circumferential groove (7) so that the mouth (14) of the evacuation tube (1) stood at a predetermined distance from the bottom (8) of the groove (7).
    [2]
    Device according to claim 1, wherein the support body (15) has an inner passage (19) which is arranged to cooperate with an outer passage (20) on the evacuation tube (1).
    [3]
    The device according to claim 1, wherein the positioning device comprises a weldable connection (22) connecting the evacuation tube (1) to the outlet part (10) and wherein said weldable connection (22) is a hinge connection defining a center of rotation for rotating the evacuation tube (1). ) in at least one vertical plane for positioning the evacuation tube (1) in relation to the bottom (8) of the spar (7).
    [4]
    A steam-heated drying cylinder for a paper machine, which drying cylinder (3) comprises evacuation tubes (1) and a device for positioning an evacuation tube (1) according to any one of claims 1-3.
    [5]
    A method for positioning an evacuation tube (1) of an evacuation system, which is arranged in a steam-heated drying cylinder (3) of a paper machine, which drying cylinder (3) has a jacket (4) which has on its inside (6) circumferential groove (7) for collecting condensate, which is formed as a result of heat transfer through the jacket (4) to its outside, which evacuation system comprises an outlet part (10), which opens onto the outside of the drying cylinder (3) and a plurality of evacuation tubes (1). ), which are arranged in a plurality of axial groups and connected to the outlet part (10), and which evacuation system is arranged to evacuate the condensate from the said groove (7) of the drying cylinder (3) to its outside via said plurality of evacuation tubes (1) and outlet part (10). ), which device for each evacuation tube (1) comprises a tube positioner arranged on a duct portion of the evacuation tube (1), which duct portion is coated closest to the jacket (4) and the method comprises applying a tube position a duct portion (13) of the evacuation tube (1), which duct portion (13) is bellows closest to the jacket (4) and which tube positioner comprises a support body (15) which is designed to abut against a part of the inside of the jacket (4) so as to thereby supporting the evacuation tube, characterized in that the support body (15) is designed to extend down to the bottom (8) of one of said circumferential grooves (7) so that the mouth of the evacuation tube (1) was at a predetermined distance from the bottom of the groove (7). (8). V zi oc 2/8
    类似技术:
    公开号 | 公开日 | 专利标题
    FI93130B|1994-11-15|transfer device
    US10260200B2|2019-04-16|Yankee drying hood arrangement, a yankee drying cylinder fitted with a yankee drying hood arrangement and a method of drying a fibrous web
    BR112015023125B1|2021-04-06|WINDER AND METHOD FOR WINDING A CONTINUOUS SHEET OF PAPER ON THE DRY END OF A PAPER MACHINE
    CN105358761B|2017-11-28|Large cylindrical drying drum and the method for manufacturing large cylindrical drying drum
    SE1250486A1|2013-11-15|Apparatus for positioning an evacuation tube, a drying cylinder with an evacuation tube and a method for positioning an evacuation tube
    JP2005320674A|2005-11-17|Drying section of machine for producing fiber web
    FI119153B|2008-08-15|End portion of an air dryer, air dryer, procedure in the end portion of an air dryer and use of a fan
    FI83247C|1991-06-10|ANORDNING FOER AVLAEGSNANDE AV VAETSKA FRAON EN ROTERANDE CYLINDER ELLER VALS.
    US3967386A|1976-07-06|Multiple rotary syphon for condensate removal from a steam-heated rotary cylinder
    FI85733B|1992-02-14|KOMBINATION AV PRESSPARTIET OCH BEGYNNELSEDELEN AV TORKNINGSPARTIET I EN PAPPERSMASKIN.
    SE538854C2|2017-01-03|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
    EP0266380A1|1988-05-11|Vacuum drying machine for tanned skins, with multiple work surfaces.
    CN206692046U|2017-12-01|One kindization spins waterproof cloth production of articles unwinding device
    GB2064718A|1981-06-17|Drying cylinder for paper machines
    US1575249A|1926-03-02|Apparatus for removing condensate from revolving driers
    CA1100311A|1981-05-05|Yankee dryer
    US8826560B2|2014-09-09|Support apparatus for supporting a syphon
    CN101053724A|2007-10-17|Centrifugal machine for separating liquid
    US1664656A|1928-04-03|Drier construction
    US4194299A|1980-03-25|Condensate discharging device
    CN105648822A|2016-06-08|Drying cylinder condensate water draining device
    CN211505395U|2020-09-15|Tunnel gas monitoring sensor
    CN203413929U|2014-01-29|Intermittent vacuum drying machine structure
    CN104514172A|2015-04-15|Durable vacuum water absorption device of paper machine
    FI123975B|2014-01-15|Drying cylinder for fiber web machine and method on fiber web machine
    同族专利:
    公开号 | 公开日
    SE537178C2|2015-02-24|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1250486A|SE537178C2|2012-05-14|2012-05-14|Device for positioning an evacuation tube as well as a drying cylinder with evacuation tube|SE1250486A| SE537178C2|2012-05-14|2012-05-14|Device for positioning an evacuation tube as well as a drying cylinder with evacuation tube|
    [返回顶部]