CN1007274B - Extended nip press arrangement - Google Patents
Extended nip press arrangementInfo
- Publication number
- CN1007274B CN1007274B CN 85103121 CN85103121A CN1007274B CN 1007274 B CN1007274 B CN 1007274B CN 85103121 CN85103121 CN 85103121 CN 85103121 A CN85103121 A CN 85103121A CN 1007274 B CN1007274 B CN 1007274B
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- CN
- China
- Prior art keywords
- woollen blanket
- paper web
- felt
- pressed zone
- paper
- 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.)
- Expired
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Abstract
The present invention relates to a pressing device of a paper-making machine, wherein one paper web is peeled and taken from a forming net, and is clamped between an upper woollen blanket and a lower woollen blanket. The paper web is transferred to the lower woollen blanket by a first double rolling region, and then, is transferred to a secondary pressed woollen blanket. The secondary double woollen blanket press is carried out on an expanded press region which is formed between an upper press roller and a lower concave block. The front edges of the concave block are separated. A waterproof band passes through the press region on the concave block, and is guided by an annular fixed guide plate. After the band passes through the expanded press region, the paper web is transferred to the upper woollen blanket by a vacuum block positioned in the woollen blanket. Then, the paper web is transferred to a fifth woollen blanket.
Description
The invention relates to the improvement of paper machine, particularly about a kind of improvement pressing device for the paper web dehydration, this paper web is from the shaping district of a paper machine.
The topmost purpose that the pressed zone of a paper machine will reach is as often as possible to remove moisture content from paper web, and does not damage the structure of paper web or crush paper web.Whenever remove some moisture content from paper web, even very little percentage also can be saved the energy greatly, this is a well known fact more.The moisture content of not removing in expressing process must be removed with heating in the drying drum district of paper machine, and removing certain unit quantity moisture content energy needed with the method for vaporization will be considerably beyond remove same units water gaging part energy needed with pressing method.
As everyone knows, in squeezing process, people have proposed a lot of pressing devices, and have in use obtained success in various degree.From to squeezing process or the squeezing structure arrangement this technology, used; which kind of should make on earth changes and improves squeezing process this point and not obvious; and improve squeezing virtually completely by finding and invention obtains, because very little change usually can produce substantial improvement aspect dehydration without any about why this change can reach improved tendency.The combination of woollen blanket and pressure roller device is infinite with substituting actual, although but infinite kind combination and alternative is arranged, but the improvement that a lot of devices can not produce the dehydration aspect, and in fact a lot of devices can not use, and this is because a large amount of moisture content has stayed in the paper web or because paper web is crushed or other can produce the phenomenon of paper inferior at the delivery end of machine.
Therefore, the object of the present invention is to provide a kind of press section of improved paper machine, it removes a large amount of moisture content and can dehydration ideally under the very fast situation of machine run in can the paper web from advance.
Another object of the present invention is that a kind of improved press device of paper-making machine will be provided, and this squeezing has been used a kind of improvement effect of extended nip press and used a kind of two roll-ins with a routine to press the method that same extended nip press combines.Another object of the present invention is the improvement that a kind of relevant paper machine aspect will be provided, so that paper web that a kind of quality improves to some extent is provided and reduces the energy that paper machine is required by an improved press section.
By means of at this specification, the disclosed content of the preferred embodiment in claim and the accompanying drawing is narrated the principle of invention, other purpose of the present invention, and it is clearer that advantage and feature will become, wherein:
Single figure in the accompanying drawing is a simple front view about a paper machine press section, and it has embodied principle of the present invention.
As shown in the figure, a paper web that has been shaped moves out then by an illustrated press section from a forming section.Paper web is represented by W and is transported on the different supporting members of diverse location in the machine that paper web is represented with digital W-1 to W-8 in the trip.
Paper web forms on a shaping papermaking wire-cloth, and this net can be the off line of a fourdrinier wire or a two-wire (paper) machine, and this net represents that with 10 it walks around a couch roll 11 and slewing rollers 12 downwards in the mode that decline strips operation.Paper web is represented with W-1 by this web positions before stripping from network.
Afterwards, paper web is transported to a press felt 13 on first, it entered downwards with net 10 close up operational relation and since suction transfer roll 14 paper web is stripped from network.Strip the paper web that gets off from network with woollen blanket 13 in-position W-2.
With a lower felt 16 upwards guiding form with glazing felt 13 and close up operational relation by a deflector roll 17, paper web W-2 just has been clipped in the middle of two woollen blankets like this, has so just entered position W-3.
After nip N-1, two woollen blankets separate, and glazing felt 13 is walked around deflector roll 15, and lower felt 16 is transported deflector roll 18.
Realize by a vacuum piece 19 to lower felt 16 transfers, and paper web enters shown position W-4 with lower felt, lower felt separation on this.
At nip N-1, wet paper web carries out the squeezing that dewaters the first time, and the moisture content of extrusion enters the rill of lower felt and roller 20 and 21.Woollen blanket is all being crossed deflector roll in the running, woollen blanket drying machine and rinsing maching and blanket tension roller, and its mode is that the skilled person in this technical field is in common knowledge, and auxiliary woollen blanket leads and the woollen blanket treatment tube is not numbered.
From position W-4(here paper web be on lower felt 16), transfer is realized on one the 3rd glazing felt 22.This woollen blanket 22 is walked around woollen blanket downwards and is transmitted vacuum furnace 23, and like this, paper web just takes on the lower surface of a woollen blanket 12 that is in position W-5.Afterwards, paper web enters into second nip N-2, and this is an extended nip press district.
In order to squeeze at second nip, paper web has been adopted the bistrichiasis blanket, it is clipped between glazing felt 22 and the lower felt 25, the latter relies on its lower surface with its band upwards by a deflector roll 26, and like this, paper web just is in position W-6.
Bistrichiasis blanket 22 and 25 enters nip N-2 together with the paper web that is clipped in the middle of their, and this nip can be an open type roller at this roller of upper press 30() and a squeezing piece 31 between form.
Squeezing piece 31 is supported on the pivot pin 32, and it has a upper recess surface to form an extended nip press district.Leading edge 33 on the squeezing piece leaves, and can form a hydraulic pressure layer with the lubricated feeding mechanism 38 of box lunch between plane on the squeezing piece and a waterproof endless belt 39 when this provides a kind of lubricating fluid.Nip is passed with woollen blanket in the endless belt.The squeezing piece is upwards pressed, and it is supported on the piston 34 in the hydraulic cylinder 35, and the hydraulic cylinder below the piston is to provide hydraulic pressure by a suitable supercharging device.This squeezing piece is upwards pressed by the effect of a certain power so that can obtain than at the bigger squeeze pressure of nip N-1 at nip N-2, this distinguish employed pressure preferably between 4000 to 8000PIi.
Waterproof endless belt 39 guides on a ring-type guide plate device, and this guide plate is slightly less than the diameter of endless belt 39, and the endless belt just can freely guide on ring-type guider 28 and slide like this.
After the expansion nip, paper web is brought to glazing felt 22 by a vacuum piece 29 that is positioned at glazing felt.Like this, paper web just is in position W-7.Lower felt 25 is directed leaving glazing felt by a deflector roll 27.Glazing felt 22 and lower felt 25 are crossed felt washing and drying device and woollen blanket deflector roll and the blanket tension roller that adapts with it, its mode knows altogether to the skilled person in this technical field, thus needn't at length be described these devices and these devices also unnumbered in the accompanying drawings.
After paper web was passed to position W-7, this paper web was passed on one the 5th woollen blanket 36, and this woollen blanket is walked around from the vacuum furnace 37 that is used to transmit.Like this, thus paper web just is in position W-8 forwards drying drum downwards to.
Aborning, paper web is stripped from the forming net 10, and is clipped in and enters first nip N-1 on first in the middle of the lower felt 13 and 16, and this nip forms between upper press 20 and lower press 21.In the side of rolling away from of nip N-1, paper web supplies to be delivered to lower felt and to be passed to the 3rd woollen blanket by vacuum furnace 23 afterwards by vacuum piece 19.Paper web is brought to position W-6, enters an extended nip press district then in the middle of by second group of woollen blanket 22 and 25 paper web being clipped in.The extended nip press district is in top roll 30 and formation between the squeezing piece 31 down.After the second extended nip press district, paper web is brought to glazing felt by a suction piece 29, thereby and is passed to in-position W-8 on the 5th woollen blanket 36 by vacuum furnace 37 paper webs.
It will be appreciated that thus I provide a kind of new and be unique pressing device, wherein paper web presses with two roll-ins of a routine and carries out the first time and dewater, so that remove a large amount of moisture content from the paper web of humidity, woollen blanket is carried in these two of moisture content infiltrations.Afterwards, paper web is by an extended nip press district, in this pressed zone the actuating pressure duration longer, the major part that remains moisture content is for the first time being removed in the squeezing for the first time, and all squeezing process enlarges pressed zone at second and finishes.Squeezing also is with a double felted press for the second time, and moisture content is towards both direction discharge up and down, and two nips all are to use double felted press.This pressing device arrangement is specially adapted to the shaping of single face paper, and this paper can be shaped by a twin former.Importantly, dehydration is to finish with very high speed towards both direction in each pressed zone.
Claims (13)
1, a kind of press device of paper-making machine, wherein a paper web peels off and transmits downwards from forming net, pressure roller among first glazing felt is positioned to forming net the operational relation of closing up, paper web is passed to first woollen blanket, second lower felt is directed into first glazing felt and makes into extruding relation and paper web is clipped in the middle of the lower felt, first pair of pressure roller with last lower compression roller plays the extruding first and second woollen blanket effects, thereby formed first pressed zone, and first and second woollen blankets just are clipped between the pressure roller, paper web in lower felt transmits the vacuum piece and paper web is passed to the lower felt that is right after first pressed zone, one is positioned to the 3rd glazing felt that becomes to close up operational relation with second woollen blanket, have a vacuum furnace that transmits in it paper web is passed to the 3rd woollen blanket from second woollen blanket, it is characterized in that second an extended nip press district that is positioned at the first pressed zone downstream, this area definition is between a first surface and second surface, second surface is a squeezing piece with a crooked leading edge, a waterproof annular expelling belt, it walks around and passes above-mentioned nip from above-mentioned briquetting; Lubricated feeding mechanism, in order between the leading edge of expelling belt and squeezing piece, to provide a kind of liquid, thereby between expelling belt and squeezing piece, form a hydraulic pressure layer, so that apply a kind of pressure to a paper web by this pressed zone, pass the woollen blanket device of above-mentioned second pressed zone, in order to from above-mentioned paper web, to absorb moisture.
2, paper machine squeezing structure according to claim 1 is characterized in that: above-mentioned second pressed zone comprises one second pressure roller, forms pressing relation with above-mentioned squeezing piece.
3, paper machine squeezing structure according to claim 1 is characterized in that: a ring-type guide plate is walked around in above-mentioned endless belt, and the diameter of this plate is identical substantially with the diameter of endless belt, and the major part of endless belt is supported on the outer ring surface of guide plate like this.
4, paper machine squeezing structure according to claim 1 is characterized in that: the woollen blanket device of second pressed zone separates with the woollen blanket device of first pressed zone, and paper web is passed to the second woollen blanket device from first pressed zone.
5, paper machine squeezing structure according to claim 1 is characterized in that: the woollen blanket device of above-mentioned first pressed zone is a kind of bistrichiasis blanket, so that paper web is clipped in wherein.
6, paper machine squeezing structure according to claim 1, it is characterized in that: the device of the woollen blanket of first pressed zone comprises a lower felt, and the woollen blanket device of second pressed zone comprises a glazing felt, a vacuum paper delivery device is arranged so that paper web is sent to above-mentioned glazing felt from above-mentioned lower felt in the glazing felt.
7, paper machine squeezing structure according to claim 1 is characterized in that: the top roll of above-mentioned first pressed zone and lower roll are the open type rollers.
8, paper machine squeezing structure according to claim 1 is characterized in that: the woollen blanket device of first pressed zone is a pair of woollen blanket, and provides in order to paper web is sent to the device of the lower felt after first pressed zone; The woollen blanket device of above-mentioned second pressed zone is a glazing felt, and provides in order to paper web is sent to the device of the second pressed zone glazing felt between above-mentioned two nips from the lower felt of first pressed zone.
9, paper machine squeezing structure according to claim 1 is characterized in that: the woollen blanket device of above-mentioned second pressed zone comprises glazing felt and lower felt, and this structure comprises in order to the device with the glazing felt of paper web after lower felt is delivered to second pressed zone.
10, paper machine squeezing structure according to claim 1 is characterized in that: the woollen blanket device of first pressed zone is a pair of woollen blanket, and has equipped vacuum plant below the lower felt in the bistrichiasis blanket in order to the lower felt of web transfers after first pressed zone.
11, paper machine squeezing structure according to claim 1 is characterized in that: the woollen blanket device of second pressed zone is a pair of woollen blanket, and it comprises one the 3rd glazing felt and one the 4th lower felt.
12, paper machine squeezing structure according to claim 1 is characterized in that: also comprise one the 5th woollen blanket, for the paper web of accepting to pass over from the woollen blanket device of second pressed zone.
13, paper machine squeezing structure according to claim 1, it is characterized in that: the woollen blanket device of first pressed zone comprises a glazing felt and a lower felt, paper web is clipped in the middle of this woollen blanket, and a vacuum furnace is housed in order to paper web is stripped down from a forming net on glazing felt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85103121 CN1007274B (en) | 1985-04-23 | 1985-04-23 | Extended nip press arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85103121 CN1007274B (en) | 1985-04-23 | 1985-04-23 | Extended nip press arrangement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85103121A CN85103121A (en) | 1986-10-22 |
| CN1007274B true CN1007274B (en) | 1990-03-21 |
Family
ID=4792979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85103121 Expired CN1007274B (en) | 1985-04-23 | 1985-04-23 | Extended nip press arrangement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1007274B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1044380C (en) * | 1995-05-19 | 1999-07-28 | 埃勒夫阿托化学有限公司 | Crossable dielectric combination |
| CN101517342B (en) * | 2006-09-18 | 2011-01-12 | 纳尔科公司 | A method of operating a papermaking process |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011082161A1 (en) * | 2011-09-06 | 2013-03-07 | Voith Patent Gmbh | Press section of a machine for producing a fibrous web |
-
1985
- 1985-04-23 CN CN 85103121 patent/CN1007274B/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1044380C (en) * | 1995-05-19 | 1999-07-28 | 埃勒夫阿托化学有限公司 | Crossable dielectric combination |
| CN101517342B (en) * | 2006-09-18 | 2011-01-12 | 纳尔科公司 | A method of operating a papermaking process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN85103121A (en) | 1986-10-22 |
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