FI71592C - FOERFARANDE OCH ANORDNING FOER SPETSDRAGNING AV BANAN I EN PAPPERSMASKIN FRAON DESS PRESSPARTI TILL TORKPARTIET. - Google Patents

Description

71592 1 Method and apparatus for paper head export from a press section to a drying section on a paper machine Ffrfarande och anordning för specddragning av hanan i en pnppersmaskin frän dess pressparti account torkpartiet 5

The invention relates to a method for papermaking a web machine from its press section to a drying section, which method is applied in a press section in which the drying section drying wire 10 is brought around its guide roll close to the press roll. , in which a rope is provided on the side, and in which method a headband is moved laterally to the rope by means of an automatically or manually operated and manually operated guide rod arranged close to said wire guide roll, preferably below it.

The invention further relates to an apparatus for carrying out the method according to the invention, which is arranged in the space between the press part and the drying part of the paper machine, the drying part comprising a guide roll arranged in the vicinity of the roll from which the web head and web are removed, over which a drying wire is passed. the drying section with the first drying cylinder or the like forms a groove into which the headband is guided and which has a headband on the side of the groove, the device comprising an elongate head-export rod arranged to be located or moved in the path of the head-export belt near said guide roller, preferably below it and is arranged mechanically 30 to operate in connection with the head export at a suitable stage in which the head extension rod moves the head extension strip laterally to the rope rope.

With the previously known press-drying section geometries, the heading of the paper web takes place in such a way that the heading strip is run on the scraper of the design of the press 35. The headband is removed from the surface of the design by a jet of compressed air, with which the band is further blown into the nip formed by the drying wire and the first drying cylinder. The speed difference maintained between the press section and the 2 71592 l drying section tightens the headband against the paper guide roll. The strip is then manually pulled between the paper guide roll and the first drying cylinder by about 0.1-0.15 meters towards the treatment side. rope gap. The free space to perform this procedure 5 is 1-2 meters.

In very recent years, the drying wire has been passed through a former paper guide roller or the like. In this case, it is very difficult and dangerous to take the head rope with the bare hand, because as in the former 10, there is no free space of 1-2 meters. The only free space is the distance of 0.02-0.1 m between the design and the guide roller. It is known, as is already known, that the head is brought into the rope-guitar by means of a separate hand tool, i.e. a head-belt hook, which is placed against the drying wire above the tensioned end between the design and the felt guide roller, i.e. the former paper guide roller. The hook is then used to push the headband downwards, i.e. to loosen the web, to move the hook near the drying wire towards the nip formed by the wire and the cylinder, and at a suitable point to pull the tape by hand towards the treatment side. The problem is that if the head is pulled into the rope spool away from the purple 20 wires, i.e. on a track that is too loose, the head will later drop between the ropes and the whole work will have to be repeated. Successful work requires experience and professionalism from the author.

The object of the present invention is to provide a method and a device with which the manual lies dangerous to occupational safety described above can be replaced and, if necessary, automated by simple method and device solutions which are reliable.

In order to achieve said and later objects, the method 30 of the invention is mainly characterized in that the operating phase of the head rod starts from the inoperative upper position of said rod above the headband (Wq), from which the rod is turned down in a certain sector and shifted axially in the axial direction. the side displacement 35 at least partially provides said side displacement (S) of the headband (W).

The device according to the invention, in turn, is mainly characterized in that the main guide rod is connected at its outer end by a shaft or the like to a pivot center around which the main guide rod is arranged to pivot from an inoperative upper position to a lower position.

The device according to the invention can be arranged to be controlled either manually or the device can be combined as part of a known head drive automation, which takes care of the head drive automatically and suitably in stages. The device according to the invention eliminates the need for manual work in the vicinity of the rotating parts and the invention contributes to reducing the interference caused by said manual steps and thus ensuring and accelerating the export of the web head-15 in the critical area between the press part and the wear part.

In the following, the invention will be described in detail with reference to some embodiments of the invention shown in the figures of the accompanying drawing, to the details of which the invention is in no way limited to ah-20.

Figure 1 shows a schematic side view of the area between the design of the press and the first drying cylinder in which the invention is applied.

25

Fig. 2 shows the position of the headband relative to the rope reel before the method lie according to the invention, seen in the opposite direction to Fig. 1.

Figure 3 shows a schematic side view of an implementation of the method according to the invention.

Figure 4 shows the same as Figure 3 seen from the opposite direction.

Fig. 5 shows the same as Figs. 3 and 4 as seen from the direction A indicated in Fig. 3.

4 71592 1 Figure 6 shows a side view of an implementation of a device according to the invention.

Fig. 7 shows the device according to Fig. 5 as seen from the direction B shown in Fig. 6.

Figure 8 shows a section A-A in Figure 6.

According to Figure 1, the headboard strip cut from the smooth surface 10 'of the full-width web is removed with a scraper 10A from a smooth surface 10', which is generally a design 10, and is passed to the pulper below. In connection with the stone roll 10, there are one or more press nips (not shown) with which water is removed from the web as is known per se.

Figure 1 shows a first upper cylinder 13 and a first lower cylinder 14 of the drying cylinders of the drying section. In the drying section, the web is conveyed forward by a drying wire 12 guided close to the design 10 around the guide roller 11. The guide roller 11 is brought as close as possible to the design 10 so that the free space H (Fig. 3) 20 of the rollers 10 and 11 is only of the order of 0.02-0.1 m. A second head rope R runs around its end near its end. Both head ropes R run in the grooves near the ends of the sowing cylinders 13, 14, of which the groove 13a of the cylinder 13 is shown in Fig. 2. The drying wire 12 and the cylinder 13 form a groove N into which the headband 25 Wq cut from the web is guided. Correspondingly, ropes RK are formed between said ropes R as shown in Figures 1 and 2.

Figure 1 of the pulper export päänvlentlnauhaa blown into the blowing apparatus 19 in the arrow direction, wherein the päänvlentinauha TU-30 lee guided into the gap of N, so that vientlnauha Wq first passes Figure 2 prominent position in the lateral direction, that is, the threading ropes R and rope-sikidan RK inside. Thereafter, the headband Wq must be moved laterally by the distance S in order to be conveyed by the rope spool RK and the ropes R. For this purpose, inside the loop 35 of the drying wire 12, on its run between the guide roller 11 and the first drying cylinder 13, blowing devices 15 are arranged, e.g. a blowing pipe or a group of pipes, the nozzles 16 of which are aligned 71592 1 in the direction of arrows F2 through the wire 12. from the surface so that said lateral displacement (distance S in Fig. 2) becomes possible.

According to the invention, said slvuttalssllrron (S) is performed by a head-export rod 20, which is shown in Figures 3,4 and 5 in three different projections. The head guide rod 20 will be located in its operating position near the guide roller 11 below it. The main winding rod 20 is a plurality of nozzle openings 21 from which air seals are blown, by means of which the main 10 substantially provides a lateral transfer S of the strip W to the rope rack RK.

O

According to Figure 4, the head rod 20 preferably has a certain small angle α with respect to the horizontal in the vertical plane. The angle α promotes the lateral displacement of the head-export strip Wq. As shown in Fig. 5, air is blown from its nozzle opening 21 through the tubular head-15 export rod 20 in the substantially export direction of the strip. The air is introduced via the head rod 20 from a pressure device known per se. The nozzles 21 are so oriented that, with their air closure F, there is a significant strip V? a component parallel to the travel 10o and a certain transverse component F1 parallel to the length of the rod 20 and which at least partially provides said lateral displacement (S) of the strip Wq to the rope strip RK. The nozzle openings 21 of the rod 20 are mainly only in the slvusllrto area of the strip Wq. By blowing through the rod 20, it is also possible to remove the strip U1 adhering to the surface of the wire 12. For this purpose, according to Fig. 3, the blows Fj from the nozzle opening or nozzle openings of the rod 25 are directed at a small angle upwards with respect to the horizontal. Thus, the blows F1 are directed obliquely towards the wire 12 and promote the release of the strip W downstream of the wire 12, even so that the blowing devices 15,16 are not necessarily needed.

30

The oblique orientation at the angle F> t of the blows shown in Fig. 5 partially promotes said side adjustment. The blows F1 also keep the strip W continuously detached from the downstream of the wire 12 between the roll 11 and the cylinder 13.

The main lead rod 20 is preferably tubular so that the air required for the blows Fj can be introduced through it. 35 6 71592 l of compressed air is preferably used as the blowing air so that the required air volumes remain small.

When using the method and device according to the invention, the head-5 export strip Wq is created as little loose as possible and remains suitably taut during the lateral transfer of the head-pull and the strip Wq.

The structure and operation of the method and apparatus according to the invention have been described above in principle with reference to Figures 1-5.

Another more detailed embodiment of the device according to the invention will now be described with reference to Figures 6, 7 and 8.

According to Figure 6, the head and side bridging device of the invention comprises a body part 18 fixed by a flange 17 to the frame beam 15 of the drying part or the like. The head rod 20 is L-shaped and is pivotable in its sector c by means of its part 22. The rod has an upper position 20 'in which it is inoperative and from which its operating phase begins. The guide arm 22 of the rod 20 is pivotally mounted on a tubular shaft 30 inside the housing 23. Inside the tubular shaft 30 there is a fixed pivot pin 31 fixed to the body 18 of the device by a screw 34. The rotatably mounted tubular shaft 30 has a guide pin 32 in a steeply sloping guide groove 33 of the fixed shaft 31. At one end of the body 18 and the tubular shaft 30 a hydraulic cylinder 25 is arranged as an actuator between the attached flange 29, which is fixed at one end 25 by a joint 26 to the body part 18 and whose piston 27 is fixed by a joint 28 to said lower part 29. As the hydraulic cylinder 25,27 is extended, the parts 29 and 30 move inside the outer opening 29 'and 30'. In this case, under the action of the guide pin 32 of the tubular shaft 30 and the guide groove 33 of the fixed shaft 31, while the guide rod 20 elir-30 extends outwards from the axial direction of the roll 11, it also pivots downwards by the angle c.

Axial lateral displacement of the rod 20, if necessary utilizing said blows F1, in particular their component, provides a lateral displacement of the headband 35 from the position Wq to the position Wq '(Fig. 7) in the gap RK between the head-valve rope R. The housing 23 has an opening 24 in which during said rotational and axial movement the arm 22 of the rod 20 can pass 71592 1. As the rod 22 rotates from the upper position 20 'up to the lower position 20, it travels along a path L away from the shell 11 of the roll and from the surface of the wire 12. This distortion contributes to the release of the head-export strip Wq from the lower surface of the wire 12 before the nip N, so that si-5 transfer is possible. Said displacement is provided so that the pivot axis 20A of the rod device 18,20 is at a certain distance below the central axis 11A of the roll 11.

The device shown in Figures 6, 7 and 8 can also operate without said blows 10 based solely on the friction between the headband rod 20 and the headband strip Wq. The surface of the headpiece rod 20 in contact with the headpiece strip Wq is suitably rounded, and the characteristics of this surface are selected with a view to the transfer according to the invention.

15

As the head rod 20 moves from the upper position 20 'to the down position, it simultaneously tightens the headband (eccentricity between shafts 10A and 20A). This tightening provides the required frictional force between the rod 20 and the headband W, so that a lateral displacement S becomes possible.

In the arrangement according to Figures 6,7 and 8, the headband Tape Wq is mechanically tightened and detached from the wire 12 while being tightened as described above by the rod 20 as the wire 12 passes between the roll 11 and the cylinder 13. In this case, the blowing devices 15,16 described above may not be required.

25

After the head removal of the strip Wq is completed, the head removal rod 20 is turned to the inoperative position 20 'shown in Fig. 6, after which the head can be spread to its full width after the head removal.

The device according to the invention operates either by hand control or it can advantageously be connected to the control system of the headband belt, so that the head removal can be performed mechanically without a manual step and, if necessary, fully automatically controlled. The mechanical device according to the invention eliminates the need for manual and work-hazardous work steps.

8,71592 1 The following describes the claims, within the scope of which the inventive idea is defined, the various details of the invention may vary and differ from those set forth above by way of example only.

5 10 15 20 25 30 35

Claims (10)

1 Patent claim Method 8 is to tip the cock of a paper machine from its pressing portion to the drying portion, which method is applied to such a pressing portion, wherein the drying wire (12) of the drying portion is guided around its guide roll (11) as it is rolled (10) by the pressing portion, from which the tip pull band (W W) is detached and transmitted by means of air blisters (1 ·) or corresponding to the gap (N) between the drying wire (12) and the first drying cylinder (13) of the drying portion or the like, with a side gap adjacent to the gap (RK), and in which method the tip pull band (Wq) is laterally transmitted to the ling tape (RK) with a mechanized tip pull rod (20) arranged in contact with said wire guide roller (11), most preferably below it, and controlled to operate automatically or manually , characterized in that the function stage of the tip-pull rod (20) is started from the non-functional upper position (20 ') of said rod (20) above the tip pull-up ribbon (Wq), from which position rod n (20) is rotated down a certain sector (c) downwards and at the same thread it is rotated and / or transmitted in the axial direction St side (Figures 6,7 and 8), with which the latter side transfer is at least partially accomplished by said side transfer (S). ) of the tip pull band (Wq). 2. A method according to claim 1, characterized in that, from the tip-drawing rod (20), mainly in the running direction of the tip-drawing band (Wq), blows (F ^) are directed, with the transverse component (Fy) being partly accomplished. the lateral offset (S) of the tip pulling band (W). Method according to Claim 1 or 2, characterized in that during the rotation stage (sector c) of said tip drawing rod (20), the tip drawing rod (20) is removed from the guide roller (11) and the wire (12) running around it and at the same time, the tip pull band (Wq) spans and at least partially loosen the tip pull band (Wq) from the lower course of the drying wire (12) between its guide roll (11) and first drying cylinder (13). Method according to any of claims 1-3, characterized in that the tip drawing band (W) is at least partially detached from said lower passage (12) by the drying wire with blowing devices (15, 16) provided at the course of the drying wire (12). ), prior to this, which race begins at the guide roller (11) in the vicinity of the rock roller (10) or the equivalent of the pressing portion of the drying wire (11). 5 5. A method according to any one of claims 1-4, characterized in that the tip pull band (Wq) is at least partially detached from the lower run of the drying wire (12) with a component (Figure 3, angle b 2) directed towards the drying wire (12) at the blows ( F ^) inserted via said tip drawing rod (20) Apparatus for carrying out the method according to any one of claims 1 to 5, which device is arranged in the space between the pressing portion and the drying portion of the paper machine, which drying portion comprises a guide roll (11) arranged in the vicinity of the roll (10) of the pressing portion. , from which the tip-pull band (VJ ^) of the web and the web are released, over which the guide roll (11) is guided to the drying wire (12), which together with the first drying cylinder (13) of the dryer-part or the like, forms a gap (N) to which the tip-pull band ( Wq) is guided and in the side of which gap (K) is provided a gap (RK) formed by tip pulling ropes (R), and which means comprises an elongated tip pulling rod (20) arranged to be in or transmitted to the tip pulling band (R) Wq) running route in contact with said guide roller (11), most conveniently below this, and which tip drawing rod (20) is arranged to mechanically function in conjunction with the tip drawing at a suitable stage, where tip drawing The transfer rod (20) Transfers the tip-pull band (W ^) in the direction of the filament to the liner (RK), characterized in that the outer end of the tip-pull rod (20) is joined by a shaft (22) or the corresponding with a center of rotation (30,31,32, 33), around which the tip pull rod (20) is arranged to rotate from its inoperative upper position (20 *) to a lower position and at the same time to move in the longitudinal direction outwardly to effect said lateral movement (S) of the lace pull band (Wq). 7. Device according to claim 6, characterized in that as a tip drawing rod (20) a tubular rod is used in which nozzle openings (21) or a corresponding nozzle gap are arranged.