CN205152716U

CN205152716U - Dryer part of fibre width of cloth material machine

Info

Publication number: CN205152716U
Application number: CN201520816427.9U
Authority: CN
Inventors: 萨米·安蒂莱宁; 汉努-佩卡·海帕宁; 卡里·尤皮; 哈里·米克拉
Original assignee: Valmet Technologies Oy
Current assignee: Valmet Technologies Oy
Priority date: 2014-10-20
Filing date: 2015-10-20
Publication date: 2016-04-13
Anticipated expiration: 2025-10-20
Also published as: FI10690U1

Abstract

The utility model provides a dryer part of fibre width of cloth material machine, this dryer part include at least one jar that is equipped with dryer (10) group (18), the dryer has steel dustcoat (12) supported by tip spare (11), dustcoat (12) are big dustcoat (19), the diameter (R) of big dustcoat is 1900mm -3000mm. The utility model provides a neotype dryer part of fibre width of cloth material machine is more high -efficient than previous dryer part, but includes still less part than previous dryer part.

Description

The drying section of fiber web machine

Technical field

The utility model relates to a kind of drying section of fiber web machine, and this drying section comprises the cylinder group that at least one is equipped with drying cylinder, and this drying cylinder has the outer cover of the steel supported by end pieces.

Background technology

The pressurized Steam Heating of drying cylinder of drying section.Current steam-heated drying cylinder is usually made up of the cast iron of such as grey cast-iron.The intensity difference of cast iron, in this case, especially under vapor pressure, the outer cover of drying cylinder must be done thick.Due to thick outer cover, drying cylinder becomes heavy.Correspondingly, heavy drying cylinder needs frame structure firm especially.The heat-transfer capability of thick outer cover is also poor.

Drying cylinder is also by steel making, and steel is higher than cast iron intensity.In this case, thin than when being manufactured by cast iron of the wall of outer cover can be made.Meanwhile, in weight, drying cylinder becomes gently more a lot of than the drying cylinder manufactured by cast iron.Like this, can use than previously lighter frame structure.In addition, the good 10%-30% of the thermal conductivity ratio cast iron of steel.In this case, identical steam pressure gives outer cover than previously higher surface temperature, and therefore has higher drying efficiency than the cylinder of cast iron.Although drying efficiency is in increase, the structure of drying section almost remains unchanged and needs and previous as many space.

Summary of the invention

The purpose of this utility model is to provide a kind of novel drying section of fiber web machine, and this drying section is more efficient than previous drying section, but comprises less parts than previous drying section.

According to the drying section of a kind of fiber web machine of the present utility model, this drying section comprises the cylinder group that at least one is equipped with drying cylinder, described drying cylinder has the outer cover of the steel supported by end pieces, and described outer cover is large outer cover, and the diameter of described large outer cover is 1900mm-3000mm.

Preferably, described diameter is 2000mm-2500mm.

Preferably, described drying section comprises multiple cylinder group, and wherein, at least one cylinder group, each drying cylinder has large outer cover.

Preferably, each drying cylinder of described drying section has large outer cover.

Preferably, between described end pieces and described large outer cover, welding point is had.

According in drying section of the present utility model, employ a kind of novel drying cylinder, this drying cylinder can be suitable for existing fiber web machine, only has less change.On the other hand, new fiber web machine can be designed to compacter than previous.Such as, than previously needing less driver and scraper.It reduce energy resource consumption and buying and operating cost.

Accompanying drawing explanation

Below by by referring to illustrating that the accompanying drawing of embodiment of the present utility model is to describe the utility model in detail, in the accompanying drawings:

Fig. 1 illustrates the schematic diagram of the fiber web machine be equipped with according to drying section of the present utility model,

Fig. 2 shows and compares according to the size between outer cover of the present utility model with known outer cover,

Fig. 3 shows the partial sectional view of the end according to drying cylinder of the present utility model.

Detailed description of the invention

Fig. 1 shows a kind of fiber web machine had according to drying section of the present utility model.Generally speaking, the drying section of fiber web machine comprises at least one drying cylinder 10, and this drying cylinder has the outer cover 12 (Fig. 3) of the steel supported by end pieces 11.In other words, some drying cylinders can be made of cast iron as usual, and other has steel outer cover.Here, as continuous print local mechanism, this fiber web machine 13 comprises forming section 14, press section 15, drying section 16 and finishing section 17.According in the fiber web machine of Fig. 1, finishing section only comprises machine rolls.Drying section 16 comprises continuous print cylinder group 18, and according in the fiber web machine of Fig. 1, the quantity of these cylinder groups is nine.Cylinder group 18 is also represented by Reference numeral R1-R9 respectively.Cylinder group is also called as dry group or the dry group of cylinder.Correspondingly, drying section also can be called as cylinder drying section.A cylinder group has at least two drying cylinders, necessary live-rollers, guide reel and the dry fabric via above-mentioned member supporting.

In the utility model, outer cover 12 is large outer covers 19, and its diameter R is 1900mm-3000mm.Diameter R is more preferably 2000mm-2500mm (Fig. 2).So drying cylinder is more much bigger than common.In FIG, the drying cylinder 10 of last cylinder group R9 is equipped with large outer cover, therefore large than other drying cylinders.Four drying cylinders now, instead of five drying cylinders not long ago.Generally speaking, drying section 16 comprises multiple cylinder group 18, and each drying cylinder 10 wherein at least one cylinder group 18 has large outer cover 19.Each drying cylinder 10 of drying section 16 preferably has large outer cover 19, in this case, can obtain than previously higher drying efficiency with the parts of the material of less amount and smaller amounts under steam pressure not long ago.

Fig. 2 shows four concentric different-diameters of drying cylinder.What the inside was represented by dashed line is the diameter determined, all manufacturers are generally 1830mm.Then, solid line represents according to diameter of the present utility model (1900mm) and outmost solid line (3000mm).In between which, what represent with more black line is the diameter (2350mm) of large outer cover 19, and this diameter is the cylinder size in the drying simulation of applicant.

Along with drying efficiency increases, the drying cylinder required when using steel to replace cast iron reduces 5-10%.In this case, especially in the modern situation of machinery, realize in space that can be former, than previous more efficient drying section, can realizing than previously higher output with modernization fiber web machine in this case.Such as, current drying section can have total 40-50 drying cylinder.In this case, the sum with the drying cylinder of steel cylinder has been reduced two to five drying cylinders according to steam pressure.In this way, drying section can be made shorter than former.

At present, the most frequently used cylinder diameter is 1800mm-1830mm.When preferably whole drying section is equipped with the drying cylinder be formed from steel, the minimizing of above-mentioned drying cylinder quantity is applied to this common cylinder diameter.But, can also preferably use steel to manufacture according to the cylinder with larger diameter of the present utility model.Based on the drying simulation carried out, diameter is increased to the quantity that 2350mm significantly reduces drying cylinder.Such as, on the pre-dryer section of board machine, there are 36 cast iron dryers with normal diameter.When this pre-dryer section is replaced by the steel cylinder according to larger diameter of the present utility model (2350mm), the quantity of drying cylinder is 26.In this example, these two pre-dryer section all determine size according to identical drying efficiency.Decrease ten drying cylinders mean omit at least one, even two cylinder groups.In this way, buy drying section and become than previously more cheap, and maintenance management cost is also more known than prior art much lower.

Fig. 3 shows the part according to drying cylinder that is of the present utility model, that have steel cover., use straight end pieces 11 here, large outer cover 19 is secured to this end pieces 11 by welding point 20.End pieces 11 is easily manufactured by steel plate, and in end pieces 11, process escape (reliefgroove) 21 and grooving (ropegroove) 22.The lid 24 of manhole 23 is also straight, and also can be manufactured by sheet material.In end pieces 11, the 3rd processing is groove 25 for balance element 26.Balance element 26 also has claw 27, this claw by positive in groove 25.In practice, centrifugal force improves balance element and remains on appropriate location, but preferably guarantees fastening by bolt.Meanwhile, balance element does not contact with the inner surface of large outer cover 19.Due to such Novel end parts, the temperature profile in the fringe region of drying cylinder becomes even.In this way, over-drying marginal portion is avoided.Sticking problem, especially may occur in the starting point of drying section with the sticking problem of the fiber being recovered utilization.Can be coated to avoid adhering to by the large outer cover of steel making.

Adopt larger-diameter steel cylinder, be preferably also used in the compact placement of drying cylinder and live-rollers in the traction of single fabric.In this case, the minimum distance between drying cylinder and the surface of revolving roll only has 15mm-80mm.In this way, frame structure also keeps low and has light design.

By directly and enough strong end pieces and associated feature, the drying cylinder of balance can be manufactured, guarantee the durability of welding point simultaneously.Instead, outer cover is thin and is manufactured by bent steel plate, and the quantity of outer cover can be such as from one to four.In this way, even if when outer cover balances, outer cover can comprise some defects in shape.In practice, outer cover can be oval a little, or the rotation outer surface of drying cylinder can cause the slight varied in thickness of outer cover.The shape defect of drying cylinder makes to keep the clean more complicated of outer cover outer surface.In practice, the contact of wing and pressure can be not enough at some when and where.In addition, defect in shape even can affect the life-span of advancing of fabric and fabric and scraper.

The heat transfer of steel cylinder is preferably reinforced by dry bar.The part with defect in shape also can be corrected by dry bar.Each dry bar is made up of U-shaped profile, and the back of dry bar is by being provided with the band of spring or the band of dry bar pressing on outer cover being installed to the position of the inner surface that against outer cover.Finally, dry bar is tightened up in place.The part with defect in shape can be corrected by means of the counterweight of such as iron staff.Counterweight is installed in the inside of U-shaped profile and is locked in place by the flange of pressing U-shaped profile.Counterweight can by the relative both sides of mounted in pairs at drying cylinder, and counterweight can on the whole distance of dry bar (in other words almost from the beginning to the end) extend.Counterweight is installed on those nearest each other dry bars of the wall of the drying cylinder containing defect in shape.In this case, in the speed of service, the circumference of the outer cover of drying cylinder aligning is circle by the impact of counterweight.

Very simple by the counterweight defect revised in shape locking onto dry bar.Meanwhile, avoid the machanical fastener of the cracking risk formed in outer cover.The program is also conducive to the outer cover of steel, and in the outer cover of steel, due to little allowance, the balance through the outer cover of processing is in fact impossible.The inner surface of the outer cover of steel is smooth, and outer surface is by ornamenting.So-called gram cylinder of raising also is used for drying, but has groove on the inner surface of outer cover raising gram cylinder, and raises a gram cylinder and have central shaft.In addition, fiber web machine usually only has one and raises a gram cylinder.

Claims

1. the drying section of a fiber web machine, this drying section comprises the cylinder group (18) that at least one is equipped with drying cylinder (10), described drying cylinder has the outer cover (12) of the steel supported by end pieces (11), it is characterized in that, described outer cover (12) is large outer cover (19), and the diameter (R) of described large outer cover is 1900mm-3000mm.

2. drying section according to claim 1, is characterized in that, described diameter (R) is 2000mm-2500mm.

3. drying section according to claim 1, it is characterized in that, described drying section (16) comprises multiple cylinder group (18), wherein, in at least one cylinder group (18), each drying cylinder (10) has large outer cover (19).

4. drying section according to claim 2, it is characterized in that, described drying section (16) comprises multiple cylinder group (18), wherein, in at least one cylinder group (18), each drying cylinder (10) has large outer cover (19).

5. the drying section according to any one in claim 1 to 4, is characterized in that, each drying cylinder (10) of described drying section (16) has large outer cover (19).

6. the drying section according to any one in claim 1 to 4, is characterized in that, has welding point (20) between described end pieces (11) and described large outer cover (19).

7. drying section according to claim 5, is characterized in that, has welding point (20) between described end pieces (11) and described large outer cover (19).