EP1353007A1 - Blasvorrichtung - Google Patents
Blasvorrichtung Download PDFInfo
- Publication number
- EP1353007A1 EP1353007A1 EP03100914A EP03100914A EP1353007A1 EP 1353007 A1 EP1353007 A1 EP 1353007A1 EP 03100914 A EP03100914 A EP 03100914A EP 03100914 A EP03100914 A EP 03100914A EP 1353007 A1 EP1353007 A1 EP 1353007A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- compressed air
- channel
- blowing device
- blowing
- nozzles
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000011111 cardboard Substances 0.000 claims abstract description 3
- 238000007664 blowing Methods 0.000 claims description 52
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000011087 paperboard Substances 0.000 abstract 1
- 230000007423 decrease Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G9/00—Other accessories for paper-making machines
- D21G9/0063—Devices for threading a web tail through a paper-making machine
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F3/00—Press section of machines for making continuous webs of paper
- D21F3/02—Wet presses
- D21F3/0272—Wet presses in combination with suction or blowing devices
Definitions
- the invention relates to blowing device for a machine for manufacturing and / or Refining a paper, cardboard, tissue or other fibrous web, which extends at least over the substantial part of the width of the fibrous web and several blowing nozzles arranged next to one another transversely to the web running direction owns, which are interconnected via a channel.
- blowing devices are used in these machines to support the Guide of the fibrous web used.
- the blown air can the direction of the fibrous web and / or the detachment of the fibrous web from one smooth roller can be affected.
- blowing nozzles are distributed over the width of the fibrous web and can be controlled separately in sections. This is relatively expensive.
- the blowing devices are considered to be transverse to the web running direction extending blowpipe formed, the compressed air at one end of the Blow pipe is supplied.
- this is simple in structure, it is only allowed to a limited extent an adjustment of the pressure conditions to the conditions of the process, especially the pressure with the distance from the compressed air supply because of the exits the blow nozzle decreases. The pressure generated by the blow nozzles on the The fibrous web can thus deviate significantly from the necessary pressure curve.
- the object of the invention is therefore that determined by the blowing nozzles To improve pressure distribution across the web direction.
- the object was achieved in that the channel had several Compressed air feeds, viewed at right angles to the web running direction different positions are available.
- the duct has two compressed air inlets.
- An optimal one The pressure profile transverse to the direction of web travel results when the Compressed air supplies approximately a quarter of the length of the duct from the end of each Channel are removed.
- the channel at least three, preferably at least 4 and in particular at least 5 Has compressed air supplies.
- the compressed air supply should be approximately uniform over the length of the Channel. As a result, it was largely uniform Pressure curve across the width of the blowing device and thus also the fibrous web on. If necessary, the pressure curve can also be adjusted accordingly Diameters of the blow nozzles are corrected.
- the pressure of the compressed air at least one, preferably all, compressed air supply lines can be controlled.
- blowing device in an opening gusset between the fibrous web and a rotating, smooth roller to support the Detachment of the fibrous web is used, it is often desirable if the of the blowing nozzles directed into the gusset exerting pressure on the fibrous web in the middle is larger than at the edges.
- the greater pressure in the middle creates an air flow to the edges and stabilizes the run of the fibrous web. This can be achieved simply by that the pressure of the compressed air supplied by the compressed air supply from the Ends of the channel increases towards the center.
- the channel goes from one to the other Blowing tube is formed which has the blowing nozzles.
- the pressure distribution in the duct and thus also the pressure generated by the blow nozzles can on the air pressure of the individual compressed air supply lines and / or on the Position of the compressed air supply lines can be influenced.
- the location of at least one, preferably all Compressed air supply is adjustable crosswise to the web running direction. This can be due to can be achieved in a simple manner in that at least one transverse to the channel Movable lance is located, with one end of the lance from the Channel is led to the outside and the other end forms the compressed air supply.
- blow nozzles each from an opening in a relatively thin wall of the Channel are formed, so the exit angle changes from the blow nozzles flowing compressed air from the two ends of the channel towards the center.
- the compressed air is approximately perpendicular to the duct flows out of the blow nozzles or the exit angle of the blow nozzles flowing compressed air with respect to the center of the channel from the ends of the channel whose center changes in approximately the same way. So at least some should Blow nozzles influence the direction of the compressed air flowing out. To do this can reach at least some blow nozzles with a longer guide surface for Directional influence of the outgoing compressed air can be provided.
- the outflow direction of the compressed air can also be influenced via a appropriate shape of the cross-sectional area of the blow nozzles. Therefore it can In this context, it can be advantageous if the shape of the Cross-sectional area of at least two blowing nozzles differs from one another.
- the cross-sectional area can be at least two blowing nozzles Differentiate adaptation to the conditions of the site.
- the cross-sectional area should the blow nozzles from the ends of the channel towards the center.
- FIG. 1 is a press arrangement of a Paper machine for dewatering the fibrous web 1.
- the Fibrous web 1 together with a press felt 9 by one of a roller 8 and a counter roll 7 formed press nip, the endless press felt 9th runs around the counter roller 7.
- the fibrous web 1 After the press nip, the fibrous web 1 remains on the smooth roller 8 to Adhere to a guide roller 10. Since the guide roller 10 from the roller 8 if only because of the manufacturing tolerances and different deflections is spaced, the fibrous web 1 runs after detaching from the roller 8 unsupported to the guide roll 10. The fibrous web 1 then passes from the guide roll 10 to a subsequent unit, for example a further press arrangement or a Drying group for drying the fibrous web 1.
- This negative pressure causes the inflow of Air into the gusset, causing the edge to flutter and consequently to in or out tearing of the fibrous web 1 can even come.
- the strong adhesion the fibrous web 1 on the smooth roller 8 also lead to tears or tears.
- the smooth surface of the roller 8 is made by the direct contact of the Fibrous web 1 required during passage through the press nip.
- the web run side gusset between the roller 8 and the fibrous web 1 one in the Gusset-oriented blowing device in the form of a cross-machine direction extending blow pipe 3 with blow nozzles 5.
- the blow pipe 3 forms at the same time the channel 11 connecting the blowing nozzles 5 and extends over the entire Width of the fibrous web 1.
- Figure 3 shows the pressure curve in channel 11 and thus also in the gusset.
- the pressure decreases from the compressed air supply 4, which results from the outlets through the blow nozzles 5 results.
- the compressed air feeds 4 are about a quarter of the Length of the channel 11 from the corresponding end of the channel 11. This results in a relatively balanced, symmetrical pressure curve.
- the blowing device in Figure 4 is also designed as a blowing tube 3, here it however, there are four compressed air supply lines 4, which are largely uniform over the Length of the channel 11 are arranged distributed.
- the air pressure is the Compressed air supply 4 controllable. This enables an even better design of the Pressure curve according to the specific requirements, as can be seen in Figure 5 is.
- the pressure curve can be even more even and in the middle Make the area thicker than at the edges of the fibrous web 1.
- FIG. 6 there is a blow pipe 3 which extends through the blow pipe 3 Compressed air tube 12 with several compressed air supply lines 4 in the form of nozzles. About these Nozzles the compressed air from the compressed air pipe 12 into the channel 11 of the blow pipe 3 and from there via the blow nozzles 5 into the gusset.
- the three nozzles of the compressed air tube 12 are distributed over the length of the blow tube 3 and have a distance here that is about a quarter of the length of the blowpipe 3 equivalent. This serves to even out the pressure curve in the gusset, like the figure 7 shows.
- FIG. 8 shows one possibility of the outflow direction from the blowing nozzles 5 to influence escaping compressed air. This is what happens when producing a Opening the wall 13 of the channel 11 from the wall 13 by punching, Burning or the like partially loosened guide part 14 bent into the channel 11. This Guide part 14 influences the flow in the channel 11 and in the blowing nozzle 5.
- a selection can be made according to the requirements for the blowing nozzle 5 in question respectively.
Landscapes
- Paper (AREA)
- Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
- Figur 1:
- einen schematischen Querschnitt durch Pressanordnung mit Blasrohr 3,
- Figur 2:
- einen schematischen Querschnitt durch ein Blasrohr 3 mit zwei Druckluftzuführungen 4,
- Figur 3:
- den Druckverlauf im Zwickel gemäß Figur 2,
- Figur 4:
- einen schematischen Querschnitt durch ein Blasrohr 3 mit vier Druckluftzuführungen 4
- Figur 5:
- den Druckverlauf im Zwickel gemäß Figur 4.
- Figur 6:
- einen schematischen Querschnitt durch ein Blasrohr 3 mit einem Druckluftrohr 12,
- Figur 7:
- den Druckverlauf im Zwickel gemäß Figur 6,
- Figur 8:
- einen Ausschnitt der Wandung des Kanals 11 mit Blasdüse 5 und
- Figur 9:
- verschiedene Querschnittsformen der Blasdüsen 5.
Claims (19)
- Blasvorrichtung für eine Maschine zur Herstellung und/oder Veredlung einer Papier-, Karton-, Tissue- oder einer anderen Faserstoffbahn (1), welche sich zumindest über den wesentlichen Teil der Breite der Faserstoffbahn (1) erstreckt und quer zur Bahnlaufrichtung (2) mehrere nebeneinander angeordnete Blasdüsen (5) besitzt, die über einen Kanal (11) miteinander verbunden sind, dadurch gekennzeichnet, dass der Kanal (11) mehrere Druckluftzuführungen (4) aufweist, die quer zur Bahnlaufrichtung (2) betrachtet an unterschiedlichen Stellen vorhanden sind.
- Blasvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Kanal (11) zwei Druckluftzuführungen (4) besitzt.
- Blasvorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass die Druckluftzuführungen (4) etwa ein Viertel der Länge des Kanals (11) vom jeweiligen Ende des Kanals (11) entfernt sind.
- Blasvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Kanal (11) zumindest drei, vorzugsweise wenigstens 4 und insbesondere mindestens 5 Druckluftzuführungen (4) hat.
- Blasvorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass die Druckluftzuführungen (4) annähernd gleichmäßig über die Länge des Kanals (11) verteilt sind.
- Blasvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Druckluftzuführungen (4) Druckluft mit unterschiedlichen Drücken zuführen.
- Blasvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Druck der Druckluft zumindest einer, vorzugsweise aller Druckluftzuführungen (4) steuerbar ist.
- Blasvorrichtung nach Anspruch 6 oder 7, dadurch gekennzeichnet, dass der Druck der von den Druckluftzuführungen (4) zugeführten Druckluft von den Enden des Kanals (11) zu dessen Mitte hin zunimmt.
- Blasvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Kanal (11) von einem quer zur Bahnlaufrichtung (2) verlaufenden Blasrohr (3) gebildet wird, welches die Blasdüsen (5) besitzt.
- Blasvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Lage zumindest einer, vorzugsweise aller Druckluftzuführungen (4) quer zur Bahnlaufrichtung (2) verstellbar ist.
- Blasvorrichtung nach Anspruch 10, dadurch gekennzeichnet, dass sich im Kanal (11) zumindest eine quer zur Bahnlaufrichtung (2) verschiebbare Lanze (6) befindet, wobei ein Ende der Lanze (6) aus dem Kanal (11) nach außen geführt ist und das andere Ende die Druckluftzuführung (4) bildet.
- Blasvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass
sich die Querschnittsfläche zumindest zweier Blasdüsen (5) voneinander unterscheidet. - Blasvorrichtung nach Anspruch 11, dadurch gekennzeichnet, dass
sich zumindest die Größe der Querschnittsfläche zumindest zweier Blasdüsen (5) voneinander unterscheidet. - Blasvorrichtung nach Anspruch 13, dadurch gekennzeichnet, dass
die Querschnittsfläche der Blasdüsen (5) von den Enden des Kanals (11) zu dessen Mitte hin zunimmt. - Blasvorrichtung nach einem der Ansprüche 12 bis 14, dadurch gekennzeichnet, dass
sich die Form der Querschnittsfläche zumindest zweier Blasdüsen (5) voneinander unterscheidet. - Blasvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass
zumindest einige Blasdüsen (5) die Richtung der ausströmenden Druckluft beeinflussen. - Blasvorrichtung nach Anspruch 16, dadurch gekennzeichnet, dass
die Druckluft etwa senkrecht zum Kanal (11) aus den Blasdüsen (5) strömt. - Blasvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass
sich der Austrittswinkel der aus den Blasdüsen (5) strömenden Druckluft bezüglich der Mitte des Kanals (11) von den Enden des Kanals (11) zu dessen Mitte etwa in gleicher Weise ändert. - Blasvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass
Blasdüsen (5) in den sich öffnenden Zwickel zwischen der Faserstoffbahn (1) und einer rotierenden, glatten Walze (8) gerichtet sind.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10215892A DE10215892A1 (de) | 2002-04-11 | 2002-04-11 | Blasvorrichtung für eine Maschine zur Herstellung und/oder Veredlung einer Faserstoffbahn |
| DE10215892 | 2002-04-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1353007A1 true EP1353007A1 (de) | 2003-10-15 |
| EP1353007B1 EP1353007B1 (de) | 2007-04-04 |
Family
ID=28051243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03100914A Expired - Lifetime EP1353007B1 (de) | 2002-04-11 | 2003-04-07 | Blasvorrichtung |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1353007B1 (de) |
| AT (1) | ATE358745T1 (de) |
| DE (2) | DE10215892A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102199893A (zh) * | 2011-01-11 | 2011-09-28 | 河南卷烟工业烟草薄片有限公司 | 新型大缸处引纸工具 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1746431A (en) * | 1928-03-19 | 1930-02-11 | Kolitsch August | Drying apparatus |
| US4836894A (en) * | 1982-09-30 | 1989-06-06 | Beloit Corporation | Profiling air/steam system for paper-making machines |
| WO2001012898A1 (en) * | 1999-08-12 | 2001-02-22 | Runtech Systems Oy | Method and apparatus for the treatment of a material web and for control of the behavior of a material web |
| EP1156154A2 (de) * | 2000-05-17 | 2001-11-21 | Voith Paper Patent GmbH | Maschine zur Herstellung einer Materialbahn |
| DE10144626A1 (de) * | 2000-10-02 | 2002-05-23 | Metso Paper Inc | Einrichtung zur Wassersabführung insbesondere aus einer Papiermaschinen-Rillenwalze |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI104646B (fi) * | 1998-07-03 | 2000-03-15 | Valmet Corp | Laitteisto ja menetelmä paperi-/kartonkiradan johtamisessa pulpperiin |
-
2002
- 2002-04-11 DE DE10215892A patent/DE10215892A1/de not_active Withdrawn
-
2003
- 2003-04-07 EP EP03100914A patent/EP1353007B1/de not_active Expired - Lifetime
- 2003-04-07 AT AT03100914T patent/ATE358745T1/de active
- 2003-04-07 DE DE50306946T patent/DE50306946D1/de not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1746431A (en) * | 1928-03-19 | 1930-02-11 | Kolitsch August | Drying apparatus |
| US4836894A (en) * | 1982-09-30 | 1989-06-06 | Beloit Corporation | Profiling air/steam system for paper-making machines |
| WO2001012898A1 (en) * | 1999-08-12 | 2001-02-22 | Runtech Systems Oy | Method and apparatus for the treatment of a material web and for control of the behavior of a material web |
| EP1156154A2 (de) * | 2000-05-17 | 2001-11-21 | Voith Paper Patent GmbH | Maschine zur Herstellung einer Materialbahn |
| DE10144626A1 (de) * | 2000-10-02 | 2002-05-23 | Metso Paper Inc | Einrichtung zur Wassersabführung insbesondere aus einer Papiermaschinen-Rillenwalze |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102199893A (zh) * | 2011-01-11 | 2011-09-28 | 河南卷烟工业烟草薄片有限公司 | 新型大缸处引纸工具 |
| CN102199893B (zh) * | 2011-01-11 | 2013-05-08 | 河南卷烟工业烟草薄片有限公司 | 大缸处引纸工具 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1353007B1 (de) | 2007-04-04 |
| DE50306946D1 (de) | 2007-05-16 |
| DE10215892A1 (de) | 2003-10-23 |
| ATE358745T1 (de) | 2007-04-15 |
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