CN1038851A - Negative pressure dewatering device of paper machine - Google Patents
Negative pressure dewatering device of paper machine Download PDFInfo
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- CN1038851A CN1038851A CN 88103782 CN88103782A CN1038851A CN 1038851 A CN1038851 A CN 1038851A CN 88103782 CN88103782 CN 88103782 CN 88103782 A CN88103782 A CN 88103782A CN 1038851 A CN1038851 A CN 1038851A
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- paper
- pressure roller
- roller
- woollen blanket
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Abstract
A kind of paper machine squeeze dehydration unit comprises that 2～5 tackle pressure roller, whenever tackles pressure roller and is furnished with the squeeze adjustments of giving roller and drives line flattening paper carrying roll, and last pressure roller has scraper.Following felt carrying l Water Paper is pressed on the roll surface of proparea through surrounding pressure roller behind the dancer rools earlier, lower compression roller has ring-shaped groove, felt and l Water Paper are by behind the nip, wet web is driven the exhibition paper carrying roll and is held up, enter next road squeezing on the felt through being attached at again behind the paper carrying roll, dewatering efficiency of the present invention is higher than prepressing, and saves squeezing felt-cloth, can the bright and clean paper in production two sides.
Description
The invention belongs to the paper machine squeeze dehydration unit, particularly to giving the improvement of squeeze dehydration unit.
In cylinder machine, particularly produce in the cylinder machine of ground paper, between squeezing two ones, cylinder and first gives pressing device.Giving pressing device generally gives pressure roller by 3～5 pairs and forms.The woollen blanket straight line passes each pressure roller is downward-sloping trend.Last pressure roller adopts the cast iron hollow roll more, and lower roll is the cast iron roll of outpacking rubber, and rubber surface does not have rill.Upper and lower pressure roller moves towards into the upright position water squeezing with woollen blanket.Give the squeeze dehydration unit schematic diagram and see accompanying drawing 6, this accompanying drawing is taken from " paper machine-theory structure and design " first the 8th page of Figure 18 (light industry publishing house, in November, the 1985 front page second impression) that Mabron is write.This shortcoming of giving pressure device is that the top roll perpendicular bisector is in lower roll perpendicular bisector front along the woollen blanket trend.Woollen blanket enters upper and lower pressure roller nip place ponding, causes water separation capability low, and is easy to take place the conquassation phenomenon.Its dehydration schematic diagram is seen Fig. 7.In order to prevent to produce conquassation, must be furnished with glazing felt, second shortcoming of giving pressure device is that wet web is clipped between the upper and lower woollen blanket and gives pressure by several roads continuously, makes paper surface form the line trace of woollen blanket.
The objective of the invention is traditional pressing device that gives is improved, improving its dewatering efficiency and to remove the woollen blanket line trace of paper surface, and make the device after the improvement that extensive applicability be arranged.
Content of the present invention is to replace giving the pressure roller group with paying the pressure roller group, constitutes negative pressure dewatering device.Paying the pressure roller group tackles pressure roller by 2～5 and forms.Whenever tackle the upper and lower pressure roller of pressure roller corresponding put be according to paper web direction of advance, lower compression roller perpendicular bisector preceding, last pressure roller perpendicular bisector after.Give the squeeze adjustments roller holding on the position of paper woollen blanket before entering nip, woollen blanket is held up, paper web is entered held the extruding of paper woollen blanket before the upper and lower pressure roller nip to invest pressure roller.On holding the position of paper woollen blanket after passing pressure roller, drive line and flatten paper carrying roll and be called for short: drive the exhibition paper carrying roll.Paper web passes nip and moves ahead promptly to be held up by paper carrying roll and leave woollen blanket, entering before the next one gives the squeeze adjustments roller, is attached on the woollen blanket again.Pressure roller is equipped with scraper on each.Each is lower than on the position of giving the squeeze adjustments roller the exhibition of the driving paper carrying roll that the pressure roller horizontal level remains between the adjacent pressure roller.
Characteristics of the present invention at first are to give squeeze adjustments roller and the last pressure roller perpendicular bisector back at the lower compression roller perpendicular bisector.Woollen blanket is given earlier the picking-up of squeeze adjustments roller before entering the pressure roller nip, and the paper web extruding is attached at pressure roller, rotates into the nip of upper and lower pressure roller then with last pressure roller.This nip is positioned at pressure roller perpendicular bisector the place ahead, and the water in the paper web is easier to discharge in extrusion process, thereby dehydrating effect is obviously improved.
Second characteristic of the present invention are that pressure roller has scraper and woollen blanket to pass the place ahead that whenever tackles pressure roller and drives line flattening paper carrying roll, are called for short and drive the exhibition roller.Scraper makes roller surface bright and clean, and the paper web of directly extruding makes the paper web contact-making surface smooth.Drive the exhibition roller and will pass the paper web picking-up disengaging woollen blanket that nip moves ahead, before the next one gives the squeeze adjustments roller, be attached on the woollen blanket again.Driving the exhibition roller drives line and flattens two effects.Driving line is to drive away through investing the woollen blanket line trace that produces on the woollen blanket one side at paper web after the overpressure zone; At first drive the sliding surface of exhibition burnishing-in and drive the line effect; Secondly paper web breaks away from the dislocation attaching that produces when woollen blanket heavily attaches woollen blanket after driving the exhibition roller, also drives the line effect through the squeezing of back.Flattening is to eliminate the paper web wrinkle and remove the l Water Paper page or leaf and the woollen blanket interplanar bubble of adhering; Also comprise bubble between eliminating layer for multilayer thick paper.Driving the exhibition roller has slight stretching action, can flatten wrinkle and discharge or extrude bubble.
The 3rd characteristics of the present invention are that each is lower than on the position of giving the squeeze adjustments roller the exhibition of the driving roller that the pressure roller horizontal level remains between the adjacent pressure roller.Satisfying under the situation of this condition, each also can be horizontal to can oblique arrangement at full roller, makes apparatus of the present invention both go for cylinder machine, also goes for fourdrinier.
Embodiments of the invention are shown in accompanying drawing 1～5:
Fig. 1 is that the present invention substitutes the schematic diagram that gives pressing device oblique arrangement pressure roller in cylinder machine;
Fig. 2 is used for the schematic diagram that fourdrinier is horizontally paid pressure roller with the present invention;
Fig. 3 is the radial section schematic diagram of paper web when passing through apparatus of the present invention.
Fig. 4 is that the axial section in lower compression roller surface cuts open figure;
Fig. 5 is that the axial section at upper and lower pressure roller press felt and paper web position cuts open figure;
Fig. 6 is traditional pressing device that gives that cylinder mould machine uses;
Fig. 7 is the press. nips radial section schematic diagram that gives shown in Figure 6;
To illustrated explanation:
Go up and pay pressure roller 1, following pair pressure roller 2, scraper 3, give squeeze adjustments roller 4, drive exhibition paper carrying roll 5, paper web 6, hold the paper woollen blanket or first press felt 7, cylinder machine is given under the squeezing and is held paper woollen blanket 7a, squeezes 8 on first, first lower press 9, following pair of pressure roller ring-shaped groove 10, following pair of pressure roller cladding hard rubber layer 11, under pay pressure roller cast iron roll shaft 12, on give pressure roller and give pressure roller 14 13 times, cylinder 15, couch roll 16.
Accompanying drawing further is illustrated the present invention in conjunction with the embodiments:
Present embodiment lower compression roller 2 diameters make and press the proparea to be easy to draining less than last pressure roller 1.Shown in Fig. 4～5.On the rubber surface layer 11 of lower compression roller 2, ring-shaped groove 10 is arranged.Structural configuration according to apparatus of the present invention shown in Fig. 1～3 along the paper web trend is: hold paper woollen blanket 7 carrying paper webs 6 down through giving squeeze adjustments roller 4 in last, clad on last pair of pressure roller 1 before the following pair of pressure roller nip in advance.Woollen blanket 7 and paper web 6 is by after the nip between last pair pressure roller 1 and the following pressure roller of pairing, and paper web 6 is opened up rollers 5 picking-ups, disengaging woollen blanket 7, and attaching once more on the woollen blanket 7 on the preceding line position.Go up to pay on the pressure roller 2 scraper 3 is arranged.Give squeeze adjustments roller 4 and can regulate woollen blanket 7,6 pairs of paper webs are gone up the cornerite β that pay pressure rollers 1, and little then woollen blanket of β value and paper web and last pair pressure roller contact-making surface are big, and β value greatly then contact-making surface is little.Adjustment β can control at the angle and give the extrusion dehydration effect.Adjust upper and lower pressure roller eccentric throw and can adapt to the moisture situation of wet web: when the mass dryness fraction of paper web improves, can dwindle upper and lower roll eccentric throw and linear pressure relatively with linear pressure.Under pay ring-shaped groove 10 arranged on the pressure roller 2.The width of groove 10, the degree of depth and spacing are pressed page thickness (yonehei amount), situation such as moisture, paper machine speed, press felt thickness and deciding, and can grasp in the degree of depth is 2～6 times of width, the rill spacing is 3～10 times of furrow width.
L Water Paper through the situation of apparatus of the present invention dehydration is: squeeze earlier afterwards to press and drive the line flattening again.3 specified in conjunction with the accompanying drawings:
Hold paper woollen blanket 7 carrying wet webs 6 and behind dancer rools 4, surround pair pressure roller 1 pressure proparea.Water in the l Water Paper is extruded according to gravity and compiles the woollen blanket lower surface.Water was squeezed and discharges swimmingly in the groove 10 that advances out following pair pressure roller 2 downwards when woollen blanket entered upper and lower pair of pressure roller nip.After woollen blanket 7 passed nip with paper web 6, paper web 6 was driven exhibition roller 5 and is held up, and the woollen blanket line trace that smooth roll surface can be not dark with paper web 6 and woollen blanket 7 contact-making surfaces is driven away.Paper web 6 produces dislocation when attaching with woollen blanket 7 once again.When exerting pressure once more, woollen blanket line itself also can produce the expeling effect to line trace old on the paper web.Will not be as traditional squeezing of giving, paper web location ground is attached on the woollen blanket through repeatedly squeezing, produces deep woollen blanket line trace, difficult expeling.Drive that the exhibition roller has that fold that slight stretching action can produce extruding and paper web and woollen blanket attaching face exist the free state air and the interlayer bubble of multilayer thick paper flatten and expeling.Pay pressing device can establish upper and lower pair of squeezing of 2～5 covers and the giving the squeeze adjustments roller and drive the exhibition roller of cover.But because its dewatering efficiency height generally has three upper and lower pair of pressure roller of cover and supporting dancer rools and drives the exhibition roller just passable.
Implementing the present invention can give about squeezing raising paper web mass dryness fraction 2 degree than tradition, can save steam about 10% to oven dry portion.
The present invention saves a top felt and attached machine parts thereof.Can eliminate the two-sided woollen blanket line trace of page.
The present invention can be used for transforming traditional cylinder mould machine, replaces giving pressing device, also can use fourdrinier.
Claims (3)
1, a kind of negative pressure dewatering device of paper machine, comprise and hold paper blanket blanket, pay pressure roller, the upper and lower pressure roller relative position that it is characterized in that whenever tackling pressure roller be according to paper web direction of advance, lower compression roller perpendicular bisector preceding, on the pressure roller perpendicular bisector after, hold the paper woollen blanket and enter on the position before the lower compression roller nip and give the squeeze adjustments roller, paper web enters and is held the extruding of paper woollen blanket before the nip and invest pressure roller; Pass on the position after whenever tackling pressure roller and drive the exhibition paper carrying roll holding the paper woollen blanket, paper web is held up by paper carrying roll and leaves woollen blanket, and in entering before the next one gives the squeeze adjustments roller, is attached on the woollen blanket again; Pressure roller is equipped with scraper on each; Each is lower than on the position of giving the squeeze adjustments roller the exhibition of the driving paper carrying roll that the pressure roller horizontal level remains between the adjacent pressure roller.
2, according to the described dewater unit of claim 1, it is characterized in that the pressure roller diameter greater than lower compression roller, last pressure roller is hollow roll cylinder iron, and lower compression roller is annular fluted roller, hollow roll outsourcing ebonite cylinder iron, squeeze adjustments roller and to drive the exhibition paper carrying roll be steel rider.
3, a kind of dewater unit as claimed in claim 2, the ring-shaped groove degree of depth that it is characterized in that the lower compression roller surface are 2～6 times of width, and the rill spacing is 3～10 times of furrow width.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88103782 CN1009669B (en) | 1988-06-23 | 1988-06-23 | Negative pressure dewatering device of paper machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88103782 CN1009669B (en) | 1988-06-23 | 1988-06-23 | Negative pressure dewatering device of paper machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1038851A true CN1038851A (en) | 1990-01-17 |
| CN1009669B CN1009669B (en) | 1990-09-19 |
Family
ID=4832748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88103782 Expired CN1009669B (en) | 1988-06-23 | 1988-06-23 | Negative pressure dewatering device of paper machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1009669B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1882744B (en) * | 2003-11-17 | 2012-08-22 | 美商艾斯登强生股份有限公司 | Herringbone type vacuum dewatering box cover |
| CN107964820A (en) * | 2017-11-16 | 2018-04-27 | 德清县东港纸业有限公司 | A kind of woollen blanket automatic flushing device of papermaking equipment l Water Paper conveying |
-
1988
- 1988-06-23 CN CN 88103782 patent/CN1009669B/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1882744B (en) * | 2003-11-17 | 2012-08-22 | 美商艾斯登强生股份有限公司 | Herringbone type vacuum dewatering box cover |
| CN107964820A (en) * | 2017-11-16 | 2018-04-27 | 德清县东港纸业有限公司 | A kind of woollen blanket automatic flushing device of papermaking equipment l Water Paper conveying |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1009669B (en) | 1990-09-19 |
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |