EP1797237A1 - Method and device for exchange of a belt - Google Patents
Method and device for exchange of a beltInfo
- Publication number
- EP1797237A1 EP1797237A1 EP05747882A EP05747882A EP1797237A1 EP 1797237 A1 EP1797237 A1 EP 1797237A1 EP 05747882 A EP05747882 A EP 05747882A EP 05747882 A EP05747882 A EP 05747882A EP 1797237 A1 EP1797237 A1 EP 1797237A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- band
- old
- new
- belt
- tape
- 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.)
- Withdrawn
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F7/00—Other details of machines for making continuous webs of paper
- D21F7/001—Wire-changing arrangements
Definitions
- the invention relates to a machine for producing a web, for example of paper or cardboard or of a film material. In this case, it relates to the changing of a work belt within such a machine, in particular a worn felt belt or wire belt in a paper machine.
- press section An essential part of a paper machine is the press section. This has a plurality of presses through which felt belts are passed, together with the still moist paper web to take up water from the paper web and deliver it elsewhere.
- the felt belts are heavily exposed to wear. They must therefore be replaced frequently. For this purpose, the felt belt is severed when the machine is at a standstill. Then a new felt belt is pulled in by wrapping around the respective group of rolls - press rolls, guide rolls and so on. Then, the two ends of the felt belt are joined together and joined together by a seam.
- presses and shapers are made in cantilever design for the purpose of changing the fabric, and seamless screens or seamless felts are used.
- the laying of a seam is unproblematic and easy and quick to perform in the current state of the art.
- the pulling of the felt belt is associated with a certain time and manpower. The process of felts takes several hours, generally between two and three hours. During this time, the machine stops, which means loss of production.
- the invention has for its object to provide a method and an apparatus with which the replacement of an old, worn work band against a new work band faster, less timely and HPC11892 WO 2
- the new tape is provided in the form of a roll; it fixes the beginning of the new band on the old band; the old tape is first clamped and severed. Then, the old tape is wound up, taking it because of the connection with the new band this while leading through the individual pressing points or around the individual rollers until the new band has completely taken the former position of the old band. It is created from the new band by laying a seam, an endless belt or a closed loop belt.
- a drawstring is fastened at the beginning of the new work belt - felt belt or wire belt.
- This will generally consist only of a narrow strip, which is fixed at the beginning of the working band, and expediently in the middle of the band, that is half the width.
- This can consist of a completely different material than the working band. It just needs to be able to train.
- This volume also exists in the form of a scroll; it's rolled up on the new work tape.
- the drawstring is wound on the winding core, and fed the new band.
- the structure of the machine is simple: The felt is drawn in as a band with two ends, and after drawing a seam is made so that the foothold of the press section does not need to be opened, but vertical on the driver's side and drive side
- the new felt belt is treated gently when pulling in, so that it is free from damage after being pulled in;
- the felt belt need not be stretched (draped) before drawing into the press section, contrary to the procedure described in "Wochenblatt für Textilfabrikation” 21/1986;
- the hall crane of the paper machine is not permanently required for drawing in the felt belt;
- the device according to the invention for drawing in the new felt belt can still be prepared while the paper machine is running;
- the security of the staff involved in the change of the film can be achieved through appropriate measures.
- Figure 1 shows a part of the press section of a paper machine in
- Figure 2 shows the retractor according to Figure 1 in an enlarged view, prepared for the Filelbechsel.
- FIG. 3 shows the object of FIG. 2 in a position rotated by 90 degrees.
- Figure 4 shows the article of Figure 2 with old and new felt belt after the mutual connection of these two.
- Figure 5 shows the article of Figure 4 after separation of the old felt belt at the beginning of its winding.
- Figure 6 shows the article of Figure 5 with the old felt belt fully wound up and with a new felt belt just before forming a seam.
- FIG. 7 again shows a retraction device analogous to that according to FIG. 6, but designed for an inclined felt band.
- Figure 8 shows a retractor in which a winding core and a new felt belt roll are mounted.
- Figure 9 shows a retracting device in which a winding core and a new felt belt roll are mounted on a horizontal element.
- Figure 10 shows a side view of a retractor, which is associated with a felt loop as part of a press.
- FIG. 11 again shows a retraction device in a view analogous to FIG. 10 in an enlarged view.
- Figure 12 shows the article of Figure 11 with the old felt belt completely or mostly removed from the machine.
- the illustrated press section comprises a top felt and a bottom felt.
- the present case concerns the top felt, hereinafter referred to as "old felt belt” 1.
- the old felt belt 1 is in the form of an endless felt belt loop
- the old felt belt 1 wraps around one row of guide rollers 2 to 7.
- the guide roller 2 is a tension guide roller with which the old felt belt 1 can be stretched.
- the old felt belt passes through a press, formed by two press rolls 8 and 9, together with the lower felt, which need not be discussed here.
- a paper web not shown here runs together with the two felt bands through the press nip, formed from the press rolls 8 and 9 and is hereby sandwiched between the felt belts.
- the construction of the retraction device 12 can be seen more clearly from FIGS. 2 and 3.
- the retractor is constructed according to three main elements, namely a rigid vertical connecting element 12.1, which is located on the leader side, as well as two horizontal elements 12.2 and 12.3, which are in the installed state above or below the felt 1.
- the length of the two horizontal elements can be equal to or slightly narrower or wider than the width of the felt 1.
- the retraction device 12 is thus open on the drive side, so that it can be pushed onto the felt band 1, not shown here, from the driver's side.
- the retracting device 12 comprises the following further elements: In the upper horizontal element it carries a bearing for the new felt strip roll 13.1. There is also at least one brake 14. The brake 14 is used at
- the upper horizontal element 12.2 furthermore carries a securing device 15 with at least one eyelet 15. 1 for fastening at least one safety belt for the passenger.
- the lower horizontal element 12.3 has on the driver's side and drive side in each case a clamping device 16 and 17. It also carries a winding station 18 in the form of a spiked roller.
- the spiked roller 18 is fixed - see Figure 5.
- the spiked roller 18 is provided with a drive.
- the drive circulates the spiked roller in such a way that the old felt belt 1 is wound up.
- the clamps 16 and 17 must be solved.
- the wound state is shown in FIG. It recognizes the felt belt roll 1.1 formed from the old felt belt. There you can see the two ends of the now retracted new felt 13. The ends of the new felt 13 are fixed by means of the clamping devices 16 and 17. The remainder of the new felt belt 13 is unwound from a felt belt roll. The ends of the new felt belt 13 are laid parallel and close to each other. Now, a zipper, not shown here, is fixed and closed at both ends. Then a seam is laid, wherein the clamping devices 16 and 17 can be solved. Then the zipper is removed. The retractor 12 has served its purpose. It is removed with the help of a crane. The old felt web roll 1.1 has now been deposited on the paper machine floor and can be further treated there.
- a particularly interesting variant of the method according to the invention is not shown in the figures, but can easily be carried out with the pulling device shown.
- a drawstring is provided, as already mentioned above.
- the drawstring is fixed at the beginning of the new felt belt 13, and preferably in the middle before its width extension.
- the new felt belt 13 can also taper at its beginning, and said drawstring be fixed to the top.
- the tension band has a length which is at least equal to the length of the old felt belt 1, or slightly larger than this length.
- the process is essentially the same as a process without using a drawstring.
- the drawstring has the advantage that initially the old felt belt 1 can be wound up substantially. Then the machine is free of any clothing and can be cleaned.
- the retracting device 12 is fitted with a roller, namely the new felt belt roll 13.1, on the same time the tension band is wound up.
- the so equipped retractor is moved by means of a crane in the correct position, as shown in Figure 1.
- the old felt belt 1 is clamped, cut and fixed on the spiked roller 18.
- the clamp is then released, and the old felt 1 wound on the spiked roller 18, wherein by means of the brake 14, the belt tension is controlled.
- the old felt belt 1 is completely wound into a felt belt roll, and the tension belt is in the position in which the old felt belt 1 was previously located.
- the spiked roller 18 continue to circulate.
- the drawstring is wound on the old felt belt roll 1.1, and at the same time the new felt belt 13 is retracted. This means that now the new felt belt 13 takes the position of the old felt belt 1 by wraps around all guide rollers and press rollers, as before the old felt belt.
- the process is very fast. It takes a period of time of the order of 1.5 hours versus 2 to 3 hours according to the prior art.
- the retraction device can basically be pushed from both sides of the machine forth on the old band to be replaced. However, deferring from the leader side is preferable.
- the device is expediently designed and arranged such that it assumes the position in the working state, as shown in FIG.
- the old tape passes through the retracting device 12 in the horizontal direction. It is also located in the top of the old band to be replaced 1, thus between the two top guide rollers 6 and 7.
- the retractor it is also possible to arrange the retractor at a different location, for. B. in a lower position, or inclined to the horizontal.
- the retractor can then be configured as shown in FIG.
- the left, horizontal side member 12.2.1 and the corresponding clamping device 16 may then be arranged lower or higher than the right horizontal side member 12.2.2 and the corresponding clamping device 17th
- a winding core 18 and the new felt belt roll 13.1 are mounted on an upper horizontal element 12.2, thus above the old felt belt 1 or the new felt belt 13 or the tension belt.
- the drive for the winding core 18 can be arbitrarily positioned. It is best placed in the center of the winding core 18, as shown. In this case, a direct drive into consideration, for example with slip-on motor or a HPC11892 WO 10
- the winding core 18 and the new felt belt roll 13. 1 are again recognizable. However, these are mounted on the lower horizontal element 12.3, thus below the old felt 1 and the new felt 13 or a drawstring.
- the drive of the winding core 18 can be arbitrarily positioned, but preferably again in the center of the winding core 18, as shown in Figure 9. Again, the positions of winding core 18 and new felt belt roll 13 can be reversed.
- winding core 18 in the embodiments according to Figure 8 and Figure 9 can also be omitted or not must be pre-assembled.
- the press of a paper machine shown in FIG. 10 has two press rolls 30, 40 which are each looped around by a felt belt. It is about the lower felt loop formed by the old felt 1.
- the retractor 12 is particularly cleverly arranged in this embodiment. This is namely no clamping of the old tape 1 before it is necessary to cut it. The old tape 1 is simply prevented by gravity from moving all too far from the winding core 18 after it has been separated (optional or not). The arrangement of the retraction device 12 thus the position of the tape end is secured.
- a drawstring 19 is provided, which is connected at a junction 20 with the old felt 1.
- WO 11 HPC11892 WO 11
- the speed at which the old tape 1 from the Machine is conveyed out is determined by the drive unit 21, which acts as a brake. Because of the connection with the drawstring or drawstrings 19, the old band 1 is not led out of the machine faster than the drive unit or the drive units track the tension band or the tension bands.
- the old band 1 is completely or at least for the most part removed from the machine - wound, for example, on the winding core 18.
- the connection point 20 can be released, and the tension band or the tension bands can be connected to the drive unit or the drive units 21. But it is also possible, the drawstring or drawstrings also roll on the winding core 18, if one is present.
- the other end of the drawstring or drawstrings is released from the drive unit or the drive units 21 and connected to the beginning of the new band 13, which is located on the roller 13.1. See Junction 22.
- the drive unit (s) - either 18 or 21 - the new belt 13 is inserted into the machine. If it has taken the former position of the old band 1, the band loop is made endless by laying a seam.
Landscapes
- Replacement Of Web Rolls (AREA)
- Paper (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004046062A DE102004046062A1 (en) | 2004-09-21 | 2004-09-21 | Method and device for exchanging an old strip for a new strip in a machine, in particular for changing a felt in a paper machine |
PCT/EP2005/052549 WO2006032544A1 (en) | 2004-09-21 | 2005-06-03 | Method and device for exchange of a belt |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1797237A1 true EP1797237A1 (en) | 2007-06-20 |
Family
ID=35094545
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05747882A Withdrawn EP1797237A1 (en) | 2004-09-21 | 2005-06-03 | Method and device for exchange of a belt |
Country Status (5)
Country | Link |
---|---|
US (1) | US20070221351A1 (en) |
EP (1) | EP1797237A1 (en) |
CA (1) | CA2581085A1 (en) |
DE (1) | DE102004046062A1 (en) |
WO (1) | WO2006032544A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI121966B (en) * | 2009-11-02 | 2011-06-30 | Metso Paper Inc | Apparatus and method for exchanging a stitched fabric for a fiber web machine |
CN111604659B (en) * | 2020-04-27 | 2021-07-27 | 中船澄西船舶修造有限公司 | Method for replacing conveying belt of ship self-unloading system |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1522801A (en) * | 1975-01-07 | 1978-08-31 | Jwi Ltd | Fabric and a method of joining the opposite ends of such a fabric together to form an endless belt |
GB2081663A (en) * | 1980-07-10 | 1982-02-24 | Albany Int Corp | Method of replacing dryer felts on papermakers machines |
US5306393A (en) * | 1992-07-16 | 1994-04-26 | Huyck Licensco, Inc. | Method for installing a fabric in a paper machine |
DE19603029C2 (en) * | 1996-01-29 | 2002-07-11 | Voith Sulzer Papiermasch Gmbh | Changing device for a conveyor belt |
FI4538U1 (en) * | 2000-04-04 | 2000-08-10 | Valmet Corp | Winding-up device for a wire |
SE518613C2 (en) * | 2001-03-16 | 2002-10-29 | Abb Technology Flb Ab | Method and apparatus for replacing the drying wire in a plant for drying a web-shaped material |
-
2004
- 2004-09-21 DE DE102004046062A patent/DE102004046062A1/en not_active Withdrawn
-
2005
- 2005-06-03 US US11/573,651 patent/US20070221351A1/en not_active Abandoned
- 2005-06-03 WO PCT/EP2005/052549 patent/WO2006032544A1/en active Application Filing
- 2005-06-03 EP EP05747882A patent/EP1797237A1/en not_active Withdrawn
- 2005-06-03 CA CA002581085A patent/CA2581085A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO2006032544A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102004046062A1 (en) | 2006-03-23 |
CA2581085A1 (en) | 2006-03-30 |
US20070221351A1 (en) | 2007-09-27 |
WO2006032544A1 (en) | 2006-03-30 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 20070206 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR |
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RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: SCHMIDT, FRANK Inventor name: AUGSCHELLER, THOMAS |
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DAX | Request for extension of the european patent (deleted) | ||
17Q | First examination report despatched |
Effective date: 20100505 |
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RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: SCHMIDT, FRANK Inventor name: AUGSCHELLER, THOMAS |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20140103 |