CN102277770A - Suction box for transmitting - Google Patents
Suction box for transmitting Download PDFInfo
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- CN102277770A CN102277770A CN2011102220727A CN201110222072A CN102277770A CN 102277770 A CN102277770 A CN 102277770A CN 2011102220727 A CN2011102220727 A CN 2011102220727A CN 201110222072 A CN201110222072 A CN 201110222072A CN 102277770 A CN102277770 A CN 102277770A
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Abstract
The invention relates to a method and a device for transmitting paper web materials into the other supporting textile from one supporting textile, in particular to a suction box for transmitting. The suction box for transmitting comprises a box and covers and the covers are provided with multiple lathes (118) which are mutually arranged at intervals; the lathes are fixed on the edge of the box, wherein the covers (80, 86, 90, 100) are flat or concave. According to that the direction of the textile/the paper web material basically does not be changed toward the suction box for transmitting provided by the invention, the tensile force of the paper web material/the textile does not apply the force toward the suction box so that the abrasion problem is solved.
Description
The application is application artificial " Metso Paper Machinery Company ", international filing date is on November 19th, 2007, entering the date in China national stage is on May 19th, 2010, international application no is PCT/EP2007/062512, national applications number is 200780101618.5, and denomination of invention is divided an application for the application for a patent for invention of " paper web being transported to the method and apparatus of another supports fabrics from a supports fabrics ".
Technical field
The present invention relates to a kind of method and apparatus that paper web is transported to another supports fabrics from a supports fabrics.Thus, the method according to this invention and for example be applicable to width of cloth material is transported on the press felt and from press felt from wet end (Siebpartie) according to equipment of the present invention and be transported to the drying section.When the first pressure portion (Presse) of the splenium (Pressenpartie) from paper machine, board machine or other corresponding machines with paper web or board web material is transported to the second pressure portion, use described method and apparatus advantageous particularly.In addition, the method according to this invention and also can be used on all or nearly all position that width of cloth material is transported to another fabric from a fabric in the paper machine according to equipment of the present invention.The invention particularly relates to a kind of transmission suction box.
Background technology
Below be that example is described the carrying method of paper web in the prior art and the conveying equipment of paper web in detail with the splenium of paper machine.Current, the wet end splenium afterwards that follows paper machine closely mainly is made up of two pressure portions that are provided with continuously, wherein paper web is mainly by at least one felt, as a rule be sent to another nip by a fabric-supported and from a nip, wherein paper web supported advancing on the part in the path between two fabrics.In this article, term " fabric " " can also be understood that conveyer belt.With paper web when the first pressure portion (i.e. first nip) is transported to the second pressure portion (i.e. second nip), paper web must be at first breaks away from and is attached with first felt (for example going up felt) of the first pressure portion and remain on second felt (for example playing felt).Afterwards, width of cloth material supports and is led to the second pressure portion by described second felt, and place's width of cloth material is brought on the felt of the second pressure portion in the second pressure portion.This carries out basically in the following manner, and promptly width of cloth material at first forms with first felt of the second pressure portion and contacts, and second felt with the first pressure portion breaks away from subsequently, attaches to remain on first felt of the second pressure portion, and contacts with second felt formation of the second pressure portion.
Important position is that width of cloth material and felt break away from and be transported to those positions on the next fabric when width of cloth material is guided.As the disengaging of fruit bat material finish careful inadequately, will exist width of cloth material to tear or the danger of width of cloth material fracture.The position that width of cloth material breaks away from, promptly lead near the felt roll all being positioned under most of situation the width of cloth material position of extracting (Abheben), and wherein the first pressure portion felt ring (collar is led felt roll around this and is advanced, and the path of another felt is extend past on this roller relatively as the crow flies then.When first felt detoured around this roller, spontaneous relevant with the roller rotating speed with roller diameter but relatively large all the time centrifugal force acted on the width of cloth material naturally, so that this width of cloth material and first felt break away from.Yet visible is can not only rely on centrifugal force, but must assist width of cloth material to break away from by any adsorbent equipment before described roller.
Described adsorbent equipment has two kinds of different fundamental types: suction roll (Saugwalze) and transmission suction box
Its application examples is as describing to some extent in patent documentation US 5,888,354.In principle, acting as of this adsorbent equipment of two types sees through the felt that continues backweb and apply suction (Sog) on width of cloth material, is held in place on the felt of absorption direction side so that width of cloth material breaks away from and attaches with the felt that is positioned at absorption direction opposition side.Suction roll is a reliable device, and the use of suction roll is when width of cloth material and the actual disengaging of first felt or can not go wrong usually when width of cloth material is maintained on second felt.Yet, the problem of other types can appear when using suction roll: at first, regulate binding domain width complexity and cost height in suction roll; Secondly, purchasing, move and keeping in repair of suction roll is all very expensive.
As second kind of feasible program, transmit suction box purchase and to move explicit costs lower.For example american documentation literature 4,113, and 557 have related to a kind of use that is used for breaking away from from network/extract the transmission suction box of paper web.Describe in detail in described document, how paper web is guided around roller with net and felt.Transmitting suction box is arranged near this roller but after this roller, makes width of cloth material and net disengaging by this transmissions suction box.In order on width of cloth material, to keep bigger suction-operated, guarantee promptly that felt abuts in to transmit on the suction box felt and transmit suction box and be provided with like this: felt and turn to angles with respect to the direction of net by transmitting suction box less than 45 degree with the width of cloth material of felt.In other words, felt width of cloth material covers in the convex of suction box and carries out bending, and this makes the wearing and tearing increase of lid and felt.
Yet, transmit suction box and can not be used in the very fast paper machine of speed, because as mentioned above, the lid of suction box and cover the felt of advancing at this and can be depleted.Its reason is that advancing of felt is configured to usually, and the direct of travel of felt changes on suction box and felt covers owing to its tension force is compressed against suction box.In other words, the vacuum action (Vakuum) of the variation of above-mentioned felt direct of travel on suction box and suction box abuts in suction box with felt absorption and covers, and the quick loss of felt and suction box lid wherein can take place.If felt covers at suction box with higher speed and advances, this loss also can be enhanced.Therefore, transmitting the use of suction box in the paper machine that speeds up constantly reduces.
Summary of the invention
According to the present invention, by a kind of defective that is used for the New Scheme that paper web is transported to another supports fabrics reliably from a supports fabrics is eliminated the prior art relevant device is provided.Described scheme comprises a kind of method and a kind of corresponding apparatus, and makes the speed of machine no longer exert an influence to the loss of case lid or felt based on the use that transmits suction box.Can realize above-mentioned purpose by technical scheme as described below.
In according to the solution of the present invention, can not occur fabric/paper web on the suction box basically and change transmitting towards the direction of lid, make the tension force of width of cloth material/fabric can not apply power towards suction box.Therefore, acting on unique load that suction box covers in case of necessity is the absorption affinity that the vacuum action by suction box produces.What should emphasize in this article is, can change according to the solution of the present invention, and wherein fabric does not contact suction box, thereby has solved described wear problem.In addition, in according to the solution of the present invention, also can produce required paper web pulling force, thereby guarantee that reliable width of cloth material advances at transfer position.
Except conveying width of cloth material was very reliable, other advantages of the present invention were as described below:
Compare with current suction roll,,, said nothing of operation and energy resource consumption so the cost of purchasing and moving is obviously lower because suction box only structurally just is better than suction roll;
Compare with current suction roll scheme, the loss of suction box lid is littler even do not have a loss;
Compare with current suction roll scheme, the loss of felt is littler even do not have a loss;
Roller at all transfer position places can have identical size, and fewer thus purpose acknowledgment copy is just enough.
For the method that is used for paper web is transported to from a supports fabrics another supports fabrics according to a preferred embodiment of the present invention, wherein the paper web between two fabrics is guided to adsorbent equipment, described paper web breaks away from the fabric of a side relative with adsorbent equipment that is positioned at width of cloth material by adsorbent equipment, and on the fabric that is positioned at the adsorbent equipment side, continued to transmit, it is characterized in that, the suction of adsorbent equipment is aimed at the deflector roll of a side relative with adsorbent equipment that is positioned at width of cloth material, and the fabric of paper web and deflector roll side breaks away from following position basically, the direction of motion of the fabric of the deflector roll side of advancing at this location following deflector roll begins to depart from the direction of motion of the fabric of adsorbent equipment side, in addition, passing fabric in this position that width of cloth material breaks away from basically at the air layer of the side of this position outside the paper web edge is sucked away.Advantageously, be arranged in adsorbent equipment lid seam or begin to be set up on following plane along the discrete opening that the horizontal direction of paper web extends into row, described plane extends through the axis of deflector roll and passes paper web and originally follow the line that fabric that deflector roll advances breaks away from the place.At this, seam or the discrete openings that becomes to be listed as are longer than the width of paper web and are shorter than the width of fabric that is positioned at the adsorbent equipment side.
Preferably, be arranged in described adsorbent equipment lid seam or begin to be set up on following plane along the discrete openings that the horizontal direction of described paper web extends into row, this plane is passed the axis of described deflector roll and is passed described paper web and originally follow the line that fabric that described deflector roll advances breaks away from the place and extend.
Preferably, described seam or the discrete openings that becomes to be listed as will be longer than the width of described paper web, but are shorter than the width of fabric that is positioned at this adsorbent equipment side.
Preferably, the fabric that is positioned at this adsorbent equipment side is guided on the lid of this adsorbent equipment, and does not change at the direct of travel of the described fabric that covers.
Preferably, the suction of described adsorbent equipment is aimed at the deflector roll on the side relative with this adsorbent equipment that is positioned at this paper web, and the fabric of this paper web and this deflector roll side has begun to break away from before described deflector roll.
Preferably, described paper web is maintained on the fabric that is positioned at this adsorbent equipment side by the suction of the continuation of this adsorbent equipment of second seam that has described further away from each other deflector roll and be provided with.
Preferably, before the disengaging configuration of described paper web and/or afterwards, the air layer of the side outside the edge of described paper web passes fabric and is sucked away.
Preferably, the width of the air layer of the side that is sucked away is 5 to 150mm in each side of described paper web, is preferably 40 to 70mm.
Preferably, the fabric that is positioned at this adsorbent equipment side is with 0.5 to 5mm, and preferred 1 to 3mm spacing is guided through this adsorbent equipment.
Preferably, the tension force that is positioned at the fabric of this adsorbent equipment side is 3 to 5kN.
Preferably, the low pressure that is produced by described adsorbent equipment is to hang down 1 to 40kPa than environmental pressure, and preferred 15 to 35kPa.
Preferably, said method is used for this paper web is transported to splenium from the wet end of paper machine.
Preferably, said method is used for this paper web is transported to drying section from the splenium of paper machine.
Preferably, said method is used for this paper web is transported to a back pressure portion from the previous pressure portion of the splenium of paper machine.
Method for another preferred implementation according to the present invention is characterized in that, locates at the inlet portion (Einlaufzwickel) (inlet gap) of deflector roll, promptly passes through superpressure
Make the position of the fabric disengaging of width of cloth material and deflector roll side, apply suction.
Be used for paper web is comprised from the equipment that a supports fabrics is transported to another supports fabrics: the fabric that is positioned at the both sides at least of paper web W; Be used to make the adsorbent equipment of width of cloth material W and the disengaging of first fabric, wherein width of cloth material is subsequently by second fabric-supported; And be positioned at deflector roll on the side relative of width of cloth material and fabric with adsorbent equipment, the fabric that breaks away from width of cloth material is continued to transmit by this deflector roll, it is characterized in that, described adsorbent equipment is formed by transmitting suction box, row or the discrete opening of multiple row that this transmission suction box has lid and is arranged in the one or more suction seams of this lid or intersects with the fabric direct of travel, this suction box is arranged near deflector roll, the position that the roller surface beginning that a seam of lid is located substantially on deflector roll and the direction of the fabric that transmits the suction box side depart from, wherein at least one seam or at least one row opening are extending on greater than the width that abuts in the width of cloth material on the fabric below the fabric.Preferably, the discrete openings of seam or one-tenth row is shorter than the width of fabric that is positioned at the adsorbent equipment side.
Preferably, described seam or the discrete opening that becomes to be listed as stretch out this paper web edge 5 from the side to 150mm on each side of described paper web, and preferred 40 to 70mm.
Preferably, described fabric stretch out described seam from the side or become row discrete opening respectively hold 100 to 200mm.
Preferably, the lid of described transmission suction box is flat, that is is straight.
Preferably, to be configured to be recessed to the lid of described transmission suction box.
Preferably, the lid of described transmission suction box has two seams or the discrete opening of two row, wherein, first seam or the discrete opening of first row observed along the paper web direct of travel are used to make described paper web and the outer fabric of observing from described transmission suction box to break away from, and second seam or the discrete opening of secondary series are used to then guarantee that described paper web is attached to the fabric that is positioned at described transmission suction box side.
Preferably, the lid of described transmission suction box has at least two seams or at least two and is listed as discrete opening, wherein, is arranged in the inlet portion zone of described deflector roll at least along the opening that first of paper web direct of travel observation is stitched or first row disperse.
Preferably, the lid of described transmission suction box has a plurality of seams or the discrete opening of multiple row in the inlet portion zone that is arranged in described deflector roll.
Preferably, the lid of described transmission suction box have basically with from described deflector roll identical direction of paper web that roller is advanced backward.
Preferably, slotted in the surface of described deflector roll.
Preferably, described fabric is the felt of splenium, and described transmission suction box is used for described paper web is transported to the second pressure portion from the first pressure portion.
Preferably, fabric is made of the fourdrinier wire of wet end, and another fabric is made of the felt of splenium, and wherein said transmission suction box is used for described paper web is transported to described splenium from described wet end.
Preferably, fabric is made of the transmission fabric of splenium, and another fabric is made of the dry net of drying section.
Preferably, be provided with adjustment means, so that regulate the length that the discrete opening of described seam or one-tenth row works on the width of described paper web.
Equipment for according to another preferred implementation of the present invention is characterized in that, a seam of lid is positioned on the inlet portion of deflector roll.
Be used for paper web is transported to the method according to this invention of another supports fabrics and provides in other parts according to all the other features of equipment of the present invention from a supports fabrics.
Description of drawings
Following with reference to accompanying drawing detailed description the method according to this invention with according to equipment of the present invention.
Wherein:
Fig. 1 is a kind of equipment that is used for paper web is transported to from a supports fabrics another supports fabrics according to prior art;
Fig. 2 is the another kind of equipment that is used for paper web is transported to from a supports fabrics another supports fabrics according to prior art;
Fig. 3 is the schematic diagram that has according to the splenium of the paper machine of several preferred implementations of the present invention;
Fig. 4 is the optional embodiment of the machine among Fig. 3;
Fig. 5 is the equipment that is used for paper web is transported to from a supports fabrics another supports fabrics of first and second preferred implementations according to the present invention;
Fig. 6 is the equipment that is used for paper web is transported to from a supports fabrics another supports fabrics of third and fourth preferred implementation according to the present invention;
Fig. 7 is the detailed view that is used in the lid scheme of the suction box scheme in the apparatus according to preferred embodiments of the present invention;
Fig. 8 is part fabric and maintenance width of cloth material thereon and the view that has the suction box of seam; And
Fig. 9 is the side view that has the suction box of seam, in order to describe the position of seam with respect to deflector roll.
The specific embodiment
Fig. 1 show according to prior art at american documentation literature 5,888, the partial view of the paper machine-splenium that relates in 354, this splenium is included in and is used for paper web is transported in the equipment of another supports fabrics from a supports fabrics.Splenium shown in the accompanying drawing is made up of the first pressure portion 10 and the second pressure portion 20.The first pressure portion is made of boots roller 12 and opposed roll 14 thereof in the accompanying drawings, and the paper web between two felts 32 and 34 is advanced from left to right in the accompanying drawings and passed the nip of the first pressure portion.First felt 32 is advanced with being lasso (schlaufe) shape, and boots roller 12 is positioned at this lasso, so that extend upward around this boots roller leading the path that makes the felt 32 of winning under felt roll 16 adjustable situations.Second felt is then advanced on opposed roll 14.In opposed roll 14 and lead on the route between the felt roll 16, paper web W is by transmitting suction box 18 and 32 disengagings of first felt.At this, the suction of suction box 18 passes second felt 34 and affacts on the paper web W, thereby the width of cloth material and first felt 32 are broken away from.Because the direct of travel of first felt 32 is no longer guided along the lid of suction box 18 simultaneously, but advances than the highland slightly, so paper web W can break away from first felt easily.Simultaneously, the suction of suction box 18 also is used for paper web W attaching is remained on second felt 34.In this scheme, second felt 34 is extracted as by suction box 18 guarantees that second felt keeps in touch with the lid of suction box 18 all the time, guarantees again that thus effect all the time has uniform suction on paper web W, and this suction remains on paper web W on second felt 34 reliably.Yet this process can be combined with the higher relatively wearing and tearing load of suction box lid, makes that thus lid and press felt are depleted soon.Higher in speed of production especially, for example surpass under the situation of 1100m/min, will this thing happens.
Be arranged in the second portion (i.e. the second pressure portion) 20 that paper web W on second felt 34 is directed into pressure portion, this second pressure portion 20 is in the accompanying drawings by the 3rd felt 22 with transmit suction roll 24 expressions.Transmitting suction roll 24 is used for extracting paper web from this second felt 34 before second felt 34 of the first pressure portion 10 is directed downwardly by roller 26.In principle, suction roll is removed paper web with the foregoing same way as relevant with transmitting suction box 18 from second felt 34.Support by suction roll 24, represent the 3rd felt 22 of the second pressure portion 20 to make paper web W continue to be transmitted herein, until the 4th felt (not shown) that arrives the second pressure portion that belongs to from the below, this moment, the paper web between two felts was directed in the nip of the second pressure portion immediately once more, and correspondingly still can be directed in subsequently other nips.
Fig. 2 shows at american documentation literature 5,888, related complete correspondence and identical paper machine-splenium in 354, and wherein identical Reference numeral is represented identical parts.Be that with unique difference of scheme shown in Figure 1 transmission suction box 18 shown in Figure 1 is herein by suction roll 18 ' replacement, by this suction roll 18 ' can realize and suction box 18 identical functions.In this scheme, the suction roll 18 by rotating ' the solved problem of felt and the loss of suction box lid.Though eliminated the problems referred to above by a kind of scheme, but the problem that also has the cost costliness of purchasing, moving and keep in repair, because the suction roll as revolving member is compared with suction box except vavuum pump and pipeline, also need supporting member, be used for the fixing gas seal member and the drive unit of sealed rotational roller.
Fig. 3 shows the schematic diagram of splenium that has according to the present invention the paper machine that is apparatus according to preferred embodiments of the present invention.Splenium among Fig. 3 constitutes by the first pressure portion 40 that constitutes around first nip 42 with around the second pressure portion 60 that second nip 62 is constructed.Width of cloth material W is for example being supported from the wet end of paper machine by net 44 and is arriving the first pressure portion 40.Width of cloth material is brought on first press felt 46 from net 44 by means of transmitting suction box 48 and deflector roll 50.Width of cloth material W between described felt 46 and press felt 52, that supported by first press felt 46 is directed in the nip 42.Width of cloth material between felt 46 and press felt 52 arrives deflector rolls 54 from nip 42, and width of cloth material breaks away from press felt 52 by the transmission suction box 56 on the side relative with deflector roll 54 that is positioned at width of cloth material herein.The route of press felt 52 continues to extend downwards, and width of cloth material is supporting the second pressure portion 60 that is led to by press felt 46.In the second pressure portion 60, width of cloth material at first formed with the 3rd press felt 66 before nip 62 and contacts, subsequently by means of transmitting suction box 68 and press felt 46 disengagings and abutting on the 3rd press felt 66.After this, the width of cloth material between the 3rd press felt 66 and first conveyer belt 72 is guided through second nip 62.So press felt 66 breaks away from width of cloth material and turns at deflector roll 70 places.Width of cloth material has very big adhesive force on conveyer belt 72
, so width of cloth material is along with conveyer belt 72 is together advanced.At slewing rollers 168 places of conveyer belt 72, width of cloth material forms with drying-transmission felt 166 and contacts and abut on the transmission felt 166 by means of transmitting suction box 169.This makes width of cloth material be continued to be sent in the drying section of machine.
Fig. 4 shows the quite similar structure of the splenium of paper machine, and wherein, the Reference numeral identical with Fig. 3 is used for the identical parts of identification function.The difference of itself and Fig. 3 is that width of cloth material is transported to drying by conveyer belt 72 by suction roll 170 or transmits on the felt 166 herein.
In the scheme that is used for the second pressure portion 60 that paper web is transported to from the first pressure portion 40 of paper machine according to the preferred embodiment of the present invention shown in Fig. 5, what the paper web between first press felt 46 and second press felt 52 arrived pressure apparatus (Pressvorrichtung) from the left side leads felt roll (deflector roll) 54, and this pressure apparatus for example can be made of boots pressure portion (Schuhpresse) or roller pressure portion.In a side relative with deflector roll 54 of felt 46, promptly second press felt, 52 sides are provided with near roller 54 and transmit suction box 56, and the lid 80 of this transmissions suction box 56 has two and stitches 82 and 84 in the embodiment that illustrates.First seam of observing along width of cloth material direct of travel 82 preferably just in time is positioned near the deflector roll 54.Yet, seam also can be arranged on inlet portion (left side in the accompanying drawing), or being arranged on the following position of width of cloth material with respect to roller 54, first press felt 46 of advancing on the surface of this location following roller 54 that is to say export department (right side in the accompanying drawing) along the direction deflection different with second press felt.First seam 82 can begin on following plane, and this plane extends through the axis of deflector roll 54 and passes paper web and originally follow the line that felt 46 that deflector roll 54 advances breaks away from places.Should also be noted that the location of the number decision seam of seam.In other words, stitch manyly more, outermost seam is more away from the deflector roll position.Because slotted in the surface of deflector roll 54 or the surface of deflector roll 54 is processed into air and can flows at width of cloth material extracting position place, can make first felt, 46 disengagings that paper web and the surface of following deflector roll 54 advance and paper web is remained on the surface of second press felt 52 so transmit suction box 56.This disengaging configuration second seam (not shown) afterwards that is positioned in the lid 80 of transmission suction box 56 is used to guarantee that width of cloth material also is attached to fabric 52 after the detach procedure of reality; Can in the felt guiding, on fabric 52, width of cloth material be retained to always the deflector roll 64 of the 3rd press felt 66 of the second pressure portion 60 in addition by traditional vacuum tank 58.
Basically, in the location of the transmission suction box 56 of first embodiment of the invention, except stitching 82, first of suction box lid 80 is configured to begin at press felt 46 and paper web W position separated from one another the latest basically (absorption position is preferably placed at described inlet portion before), in addition, it is flat that the lid 80 of suction box 56 is constructed to or (meeting at lid under the situation of roller surface configuration) preferable configuration is to be recessed, and the trend of the lid 80 of suction box 56 conforms to the trend of fabric 52.In other words, suction box lid 80 at all can not work to the direction change of fabric 52, but press felt 52 moves by 64 exactly determined directions of deflector roll of the second pressure portion 60 from deflector roll 54 beginning edges.
On the right side of Fig. 5 as according to the present invention second preferred implementation to show width of cloth material be how to break away from second press felt 52 and be attached on the 3rd press felt 66.Its mode is, in the lasso of second press felt, be provided with deflector roll 70, so that press felt 52 is guided around this deflector roll 70, simultaneously, near the transmission suction box 68 that is arranged in the lasso of the 3rd press felt 66 deflector roll 70 makes width of cloth material be extracted and be transported on the press felt 66 from press felt 52.In Fig. 5, only have a seam 88 corresponding to the lid 86 of the transmission suction box 68 of this second embodiment, wherein this seam 88 must be positioned at the position that press felt 52 separates with press felt 66 along width of cloth material direct of travel.
Fig. 6 show once more with paper web when first nip of paper machine is transported to second nip according to the present invention the scheme of the transmission suction box of third and fourth preferred implementation.Paper web between first press felt 46 and second fabric 52 arrives deflector roll 54 from the left side.On a side relative of felt 46 with deflector roll 54, near roller 54 and in fabric 52 sides, be provided with and transmit suction box 56, the lid 90 of this transmissions suction box 56 forms to be recessed and to have four stitch 92,94,96 and 98 in the embodiment that illustrates.The seam 82 and 84 with aforementioned embodiments is identical basically for latter two seam 96 and 98 location and action principle, promptly is used to make the width of cloth material and first press felt 46 to break away from (seam 96) and is used to make width of cloth material to remain on fabric 52 (stitching 98).Seam 92 and 94 before it is arranged in the zone of the inlet portion of deflector roll 54.Owing to produced superpressure at inlet portion, the seam that is arranged in this zone is used to make width of cloth material to break away from first press felt 46 before deflector roll 54.Strengthened the pressure reduction that width of cloth material and felt are broken away from by the suction that in seam 92 and 94, produces.As described in the embodiment that relates to before, in this embodiment, the lid 90 that transmits suction box has the trend identical with fabric 52.
In addition, figure 6 illustrates paper web further is transported on the 3rd press felt 66 from second press felt 52.This process breaks away from beginning each other with the paper web and second press felt 52.Be with unique difference of embodiment shown in Figure 5, transmit the structure difference of the lid 100 of suction box 68.In the embodiment of Fig. 6, lid 100 has two seams 102 and 104, and described seam is located like this: first seam 102 is arranged in the zone (i.e. the width of cloth material side that is entering) of the inlet portion of deflector roll 70, and second seam 104 then is arranged in the zone of export department.In other words, seam 102 and 104 is used to make width of cloth material at first to break away from (102) with press felt 52, is used for subsequently width of cloth material is attached to the 3rd press felt 66 (104).When using under the situation of the present invention, when wet end was transported to the splenium, dry thing content was about 16% width of cloth material and has good landline with paper web.For the conveying during width of cloth material is from the splenium to the drying section, dry thing content should be below 25%.
The structure that transmits suction box can be like this, and it can be conventional except the lid shape.The width of common one to five seam 114 and 116 in the lid 112 of the case 110 shown in Fig. 7 is in the size level of 5-20mm.Can determine that felt can bend in the seam under the bigger situation of seam width, this can cause seam wearing and tearing and felt wearing and tearing.Adsorbing demand then obviously increases.Cover plate bar (Deckelleisten) 118 is preferably made by ceramic material, and for the wearing and tearing that make lath 118 and felt are minimum with the edge rounding of lath.Also can consider to adopt synthetic material in some cases.A plurality of laths 118 are inserted in the keeper 120, and this keeper 120 is fixed on the relative profiled member (Gegenprofilen) 122 of suction box 110 by the mode of form fit, thereby can change lath 118 easily.Advantageously, lath is flexibly placed, and this can for example realize by the inflated hose (not shown), and this flexible pipe is inserted in Fig. 7 between keeper 120 and the relative profiled member 122.When (for example between felt) between suction box and the deflector roll equipment has thicker paper piece (Papierklumpen) suddenly, this elastic reaction can hinder the impact to lath.
In order to realize the mutual alignment of deflector roll and its optimum of transmission suction box in the transfer position shown in all that sets, deflector roll or case or the two are set to be adjustable.
Fig. 8 show to Fig. 5 at the similar transfer position of conveying between press felt 46 and the press felt 52, but herein, in transmitting suction box 56, only show a seam 82.This accompanying drawing shows the diagrammatic sketch from beneath of Fig. 5, has wherein saved press felt 46 and deflector roll 54.
The width that Fig. 8 obviously shows press felt 52, seam 82 and width of cloth material W reduces in regular turn.In other words: the width of felt is greater than the width of seam, and the width of seam is greater than the width of width of cloth material.Can realize that by this structure the air layer in the both sides of width of cloth material W in the edge region 200 is sucked away.The inventor has been found that the conveying of stabilizing panel material extraly of this process.Movably side seal 182 makes to regulate and stitches 82 width, thereby regulates the width of the air layer that siphons away.Show in addition, advantageously press felt 52 exceeds seam 82 side direction and exceeds portion greater than seam 82 portions that exceed that exceed width of cloth material W.In other words, the size Y among Fig. 8 can be preferably greater than X, but the present invention also can be worked satisfactorily when X and Y are approximate identical.When selected Y was big with respect to X, this had favourable effect to energy consumption and fabric abrasion.For X, favourablely be of a size of 5 to 150mm, be in particular 40 to 70mm.For value Y, when being 100 to 200, its value can obtain good result at this.
It should be noted that in all embodiments of transfer position, one or more seams also may be embodied as row or the discrete opening of multiple row that extends along the horizontal direction of width of cloth material (width).At this, described opening is circular port or short seam etc.
At last, Fig. 9 shows the schematic side elevation that uses transfer position of the present invention thereon.Herein, obviously can see seam 82 positions with respect to dispersal point P, two felts 46 and 52 direction begin to depart from each other at this dispersal point place.But also show, limit the elastic supporting piece of the lath 118 of the seam 82 in suction box 56 lids.As be schematically shown out, be provided with the advantageously flexible pipe 180 of using charged air pressure, this hose support lath 118.When the paper piece entered in the gap between deflector roll 54 and the suction box 56, the lath 118 among Fig. 9 can be avoided downwards and can not sustain damage.The elasticity of lath also can realize by (for example metallic elastic members) such as elastomers.Fig. 9 also shows size Z, and it is distance between the lid (being depicted as the top edge of lath 118 herein) of suction box 56 and the felt 52 of admitting width of cloth material that this size Z can be set to.It shows, although have spacing (size Z), still available good result when transmitting width of cloth material between suction box lid and the admittance felt.For Z, its value is 0.5 to 5mm and special can obtains good result in 1 to 3mm scope the time.In addition, the pressure of described equipment in suction box is in than environmental pressure low 1 to 40kPa and moves when being in particular 15 to 35kPa.
It should be noted for above-mentioned embodiment, not only can be used for the conveying of width of cloth material in splenium of exemplary description herein according to equipment of the present invention and the method according to this invention, but also can use explicitly with other width of cloth material transfer positions of paper machine.In addition, certainly, although abovely only be described with reference to paper machine, the present invention can use with board machine, cotton paper machine and Paper pulp machine equally well explicitly.Therefore, term " paper " also comprises the cardboard as subordinate concept.As a rule, therefore the present invention is applicable to all objects that web of material are transported to another supports fabrics from a supports fabrics.
Claims (5)
1. one kind is transmitted suction box, has case and lid, and described lid has a plurality of laths (118) that the space is provided with, and described lath is fixed on the case edge, it is characterized in that, it is flat or recessed that described lid (80,86,90,100) forms.
2. transmission suction box as claimed in claim 1 is characterized in that, the described lath (118) of described lid (80,86,90,100) is made by ceramic material.
3. transmission suction box as claimed in claim 2 is characterized in that, described lath (118) flexibly is fixed in the specific keeper (120).
4. transmission suction box as claimed in claim 3 is characterized in that, described keeper (120) is fixed to described suction box (56 by the form fit connection; 110) on the relative profiled member (122).
5. transmission suction box as claimed in claim 3 is characterized in that, described lath (118) is maintained in the described keeper by the flexible pipe (180) of energy strain, and wherein this flexible pipe can fill fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110222072.7A CN102277770B (en) | 2007-11-19 | 2007-11-19 | Suction box for transmitting |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110222072.7A CN102277770B (en) | 2007-11-19 | 2007-11-19 | Suction box for transmitting |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200780101618.5A Division CN101868578B (en) | 2007-11-19 | 2007-11-19 | Method and device for transferring a paper web from a supporting woven fabric to another |
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| Publication Number | Publication Date |
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| CN102277770A true CN102277770A (en) | 2011-12-14 |
| CN102277770B CN102277770B (en) | 2014-10-15 |
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| CN102277770B (en) | 2014-10-15 |
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Address after: Espoo, Finland Applicant after: Veimeide Technology Co., Ltd. Address before: Helsinki Applicant before: Metso Paper Inc. |
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