CN2037373U

CN2037373U - Cylinder smooth roll device for paper machine

Info

Publication number: CN2037373U
Application number: CN 88207409
Authority: CN
Inventors: 宋大兴
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-06-23
Filing date: 1988-06-23
Publication date: 1989-05-10

Abstract

The utility model relates to a drying cylinder light pressure roll device for a paper-making machine. The utility model comprises a light pressure roll and a light pressure roll support which are pressed on a drying cylinder in a floating pressure mode, a lifting mechanism, and a light pressure roll scraper, and the utility model is suitable for a single-cylinder and single-blanket drying cylinder with a large diameter. The utility model is positioned at a paper web and speed reducing drying region and can press the paper web with a dry surface so as to compact the paper web. The distribution of combined water is even; the quantitative compactness can be improved, and the mechanical strength and the surface smoothness of the paper web can be enhanced.

Description

Cylinder smooth roll device for paper machine

The invention belongs to the dry technology of the drying section, particularly large-scale drying cylinder of the paper machine of making continuous webs of paper.

Wet web just relies on the way of heat drying that water is evaporated after entering drying section in the prior art.This process is divided two stages, at first is that the paper web internal moisture is diffused into the evaporation rate that surperficial speed equals surperficial moisture content, is called constant rate drying period.Enter subsequently internal moisture to surface diffusion into the surface speed less than the surperficial moisture content evaporation rate stage, be called falling rate drying period.Paper web still keeps 8～10% moisture content of having an appointment after the drying cylinder evaporation drying, this part moisture content is called bound water.This part bound water is difficult to Ex-all, and owing to possess this partly bound water, just makes paper have pliability, also need not Ex-all.Paper web is behind large-scale cylinder dried in the prior art, and the defective that internal soundness exists is loose in conjunction with moisture content skewness and fibre structure character.So-called bound water distribution is inhomogeneous to be meant paper surface layer drying, and sandwich layer is moisture many.So-called fibre structure character is soft to be because in oven dry portion, moisture content is discharged with evaporated form in the paper web, and moisture content is discharged back fibre structure character and is soft shape.These defectives make the quantitative tightness of paper web low, and folding resistance, bursting strength, tear-resistant degree are all low, and easily ventilative and suction.The paper that has certain intensity in production, for example during wrapping paper, quality does not often reach requirement.In the paper machine dryer technology of using at present, all can't solve these defectives.Its common problem is that drying cylinder is only to the effect of paper web generation evaporation drying." paper machine-theory structure and design " relevant chapters and sections of writing referring to Mabron about the treatise of prior art.(light industry publishing house publishes in November, 1985)

The objective of the invention is dried paper web internal junction Heshui to be evenly distributed, improve the quantitative tightness and the mechanical strength of dried paper web simultaneously, also can improve surface smoothness by to drying cylinder, the particularly improvement of major diameter drying cylinder.

Content of the present invention is to be positioned at wet web falling rate drying period zone at drying cylinder one cover optical press roll device is installed, the extruding paper web, and it is closely knit that its internal fiber is arranged, and bound water distributes evenly.Concrete scheme be the optical press roll device by optical press roll, support transverse arm, support, optical press roll elevating mechanism, scraper and scraper rise and fall and remove constituting.Its assembly structure is: support is hinged with on the paper carrying roll support of drying cylinder both sides.The central shaft that supports transverse arm connects with support, and transverse arm one end is installed optical press roll, and the other end is installed the optical press roll elevating mechanism, and elevating mechanism is the ascending, descending of lever control optical press roll with the transverse arm, thus control optical press roll rising and falling on drying cylinder.The optical press roll doctor blade holder is rack-mount, rises and falls to remove with scraper the control scraper is risen and fallen.Support adopts cast iron materials with supporting transverse arm, and optical press roll is the hollow cast iron roll, outside cladding hard rubber.

Characteristics of the present invention are to be positioned at wet web falling rate drying period zone and have set up the optical pressure device that paper web is applied mechanical presses on drying cylinder.Press through the optical press roll dress, fiber alignment is closely knit in the dried paper web, and bound water distributes evenly, can improve quantitative tightness and mechanical strength simultaneously, and optical press roll can also make paper surface bright and clean.

Embodiments of the invention are as shown in drawings:

Fig. 1 is an optical press roll operating position schematic diagram.

Fig. 2 is an optical pressure device schematic diagram;

Fig. 3 is the optical pressure principle schematic.

To illustrated explanation:

Drying cylinder 1, carrying roller 2, optical press roll 3, paper carrying roll 4, dried paper web 5, woollen blanket 6, support 7 supports transverse arm 8, central shaft 9, optical press roll elevating mechanism 10, doctor blade holder 11, scraper rise and fall and remove 12.

In conjunction with the accompanying drawings, embodiment further is illustrated the present invention:

Present embodiment can be used for the Production and Packaging paperboard, and the position of optical press roll is in the falling-rate periods of drying district, and as shown in Figure 1, the position angle α of optical press roll 3 can be selected in 35 ° of positions 33～37 ° of interval selection in experiment, respond well.Optical press roll 3 no main transmissions, and floating being pressed on the drying cylinder 1.Relation between the carrying roller 2 of optical press roll 3 and drying cylinder 1 is: optical press roll 3 diameters are more than or equal to carrying roller 2.The motion process of paper web 5 is to break away from carrying roller 2 places and woollen blanket 6, is attached to arrive behind the falling-rate periods of drying zone closely knitly by optical press roll 3 extruding on the drying cylinder 1, peels off through paper carrying roll 4 from drying cylinder 1 then and enters reel machine.Paper web 5 situation during through the optical press roll nips as shown in Figure 3, wherein δ is paper web section before pressing, δ ₁And δ ₂Be the paper web top layer, dry anhydrous and loose, δ ₃Be the paper web sandwich layer, stain is a bound water.δ ' is through the paper web section behind the optical pressure, δ＞δ ', but grammes per square metre is constant.A kind of form of optical pressure device as shown in Figure 2.Cast iron bracket 7 can be contained on the paper carrying roll support of drying cylinder 1 both sides.The central shaft 9 that supports transverse arm 8 connects with support 7, and optical press roll 3 is installed in transverse arm 8 one ends, places on the drying cylinder 1, and transverse arm 8 other ends are equipped with optical press roll elevating mechanism 10.Doctor blade holder 11 is contained on the support 7, and scraper rises and falls to remove 12 control scrapers are risen and fallen.Scraper adopts the material scraper that is suitable for the hard rubber face, for example copper coin.According to the present invention program's optical press roll device other version can also be arranged, belong to the Machine Design category, will not state to the greatest extent.

The present invention uses the surface that can not only improve paper and interior in quality in production, also can improve paper machine speed under the constant condition of original drying capacity, is particularly useful for single cylinder, single blanket paper machine.

Claims

1, a kind of drying cylinder optical press roll device is characterized in that it being by optical press roll, supports transverse arm, and support, optical press roll elevating mechanism, scraper and scraper rise and fall and remove constituting; Its assembly structure is: support is contained on the paper carrying roll support of drying cylinder both sides, support that the transverse arm central shaft connects with support, transverse arm one end is installed optical press roll, the other end is installed the optical press roll elevating mechanism, control optical press roll rising and falling on drying cylinder, the optical press roll doctor blade holder is rack-mount, risen and fallen to remove by scraper and control a scraper and rise and fall; Support adopts cast iron materials with supporting transverse arm, and optical press roll is hollow cast iron roll, outer bread hard rubber.

2, a kind of optical press roll device as claimed in claim 1, the α angle that it is characterized in that optical press roll and drying cylinder contact point is 33～37 °.

3, a kind of optical press roll device as claimed in claim 1 is characterized in that the optical press roll diameter is more than or equal to the dryer roller diameter.