FI120445B - Fiber web machine reel water exchange device - Google Patents

Description

FIELD OF THE INVENTION The invention relates to a water-changing machine for a roll of a fiber web machine according to the preamble of claim 1.

Fiber webs such as paper, board or tissue paper are rolled on a fiber web machine to roll webs around an axis or the like. When the web roll 10 is complete, a change is made in the rewinder to move the rewind around the next rewind axis. In connection with the exchange, it is obscure in the prior art to use a water exchange device for changing the web, which comprises water jets attached to a nozzle bar, the jets of which are provided with a jet of water to cut the web. In addition, it is known in the art to use cutting devices based on the la-15 seri, as well as various blades and blows.

With respect to the prior art, reference may be made, for example, to F1 113258, European Patent Application 1022381, US Patent 5,360,179, European Patent Application 0067051 and WO Application 92/06913, and US-20508429, which disclose various web cutting procedures. DE-A-19944703 discloses a fiber web machine reel cutting device according to the preamble of claim 1, in which water jets can be used for cutting.

In particular, the present invention relates to cutting a web of a fibrous web, such as paper, board or tissue paper, in the context of a water exchange device, when changing from a full roll to a new roll.

One problem with prior art water-exchange equipment for fiber web machine reels is that they often have to be placed in a location where the necessary maintenance operations cannot be performed while the reel is being driven, so that the reel has to be shut down and thereby shut down production operations such as nozzles. . Figure 1 illustrates one prior art arrangement for positioning a nozzle-5 beam of a water exchange device in connection with a tissue machine reel. In the figure, a web splitting bar 11 is disposed on the web for the introduction of the web W, after which the web W is guided through a guide roll 12 via a runner component 13 to stabilize the web travel. Also depicted in the figure is a dashed storage foot and dust removal 15. As is shown in the figure, the spaces for positioning the nozzle bar of the water exchange device are quite narrow, which is further emphasized since there may also be above-track runnability components. The figure also shows that in prior art arrangements 15, a nozzle bar 14; The location of the 14 'is such that maintenance cannot be performed while the machine is running.

For example, with some tissue rolls, because the tissue is very bulky, the rolls of the machine roll need to be replaced frequently and the nozzles of the water changer need to be serviced / replaced frequently. As a result, production has to be stopped due to the problematic location of the water exchange device and capacity is reduced.

Particularly in North America, this problem is compounded by the so-called locking procedure 25-machine re-servicing, which means that in addition to stopping the machine, the actuators must be mechanically separately locked to ensure that no movements are made while the machine is being serviced, the time needed for maintenance work, when capacity is further reduced.

30 3

It is an object of the invention to provide a water exchange device for a fiber web machine reel, wherein the problems described above are eliminated or at least minimized.

More specifically, the object of the invention is to provide a water-5 roller changing machine for a fiber web machine, whereby the maintenance and replacement of the nozzles of the water change machine can be performed while the roller is running without the roller having to be stopped.

In order to achieve the above and later objects, the water exchange roller apparatus of the fiber web machine according to the invention is essentially characterized by what is stated in the characterizing part of claim 1.

The nozzle bar and / or nozzles of the fiber web roller water exchange device are movably and / or pivotally mounted by means of transfer and / or pivoting means so that they can be pivoted and / or movable into a service position, performs the roller while driving. According to the invention, a lock can be provided in connection with the service position of the nozzle bar to ensure that the nozzle bar is maintained in the service position.

20

Service points and consumable parts in the nozzle bar of the fiber web roller water exchange device, in particular the nozzles, are accessible from the service bridge after turning and / or moving to the service position, without having to stop the roller for 25 service operations. This allows for quick maintenance even when the machine is running, without losing capacity.

The displacement and / or pivoting means preferably comprises articulation and / or guides, wherein the nozzle bar and / or nozzles 30 can be pivoted and / or moved from the operating position to the service position and back.

4

In connection with the transfer and / or pivoting means of the water exchange device, an actuator, for example a pneumatic cylinder or a hydraulic cylinder or an electric motor or a pneumatic motor, can be followed for turning / moving to the service position and back to the 5 operating position.

The nozzle bar and / or nozzles may be pivotally mounted so that they can be pivoted to the service position. Preferably, the articulation is disposed within the pivoting center of the nozzle bar, whereby the water, air, electrical and other inputs of the water exchange device can be introduced into the beam near the pivot point without having to be disassembled during maintenance operations. Advantageously, the joint can be implemented as a flexible joint, which facilitates the export of inputs and increases the durability of the joint.

15 The pivoting movement from the operating position to the service position is simple with the pivoting in the pivot center. Further, if an actuator is used to effect the pivoting movement, then the forces required are small and thus do not require a large force on the actuator.

20 Turning / moving the nozzle bar and / or nozzles to the service position puts the nozzles in a more secure position so that they are not so exposed to dust and / or flying paper shards. In the service position, the nozzles of the water exchange unit are also not in the path of the head thread, which facilitates head threading.

Preferably, the operating position of the water exchange device of the fiber web machine reel is such that the nozzles are located close to the point where the web enters the surface of the reeling cylinder.

The transfer and / or pivoting means 30 of the fiber web machine reel water exchange device may comprise a pivot and / or transfer for moving from an operating position to a service position and 5 back to further specify the operating position if necessary.

The water exchange device according to the invention for cutting the web is suitable for use in web-cutting in connection with the winding of a fibrous web, in particular a tissue paper web, when changing from a full roll to a new roll. The invention is applicable to water exchange devices of various fibrous webs, such as paper, board and especially tissue paper rolls, both in applications where the nozzle bar is positioned above the web and in applications where the nozzle bar is located below the web.

In the following, the invention will be described in more detail with reference to the figures in the accompanying drawings, the details of which, however, are not to be narrowly limited.

15

Figure 1 schematically illustrates one prior art example for positioning a nozzle bar of a water mill of a dryer machine roller.

Figures 2A-2B schematically illustrate an embodiment of the invention wherein the nozzle-20 beam is pivotable to a service position.

Fig. 3 schematically illustrates an embodiment of the invention in which the nozzles are pivotable to a maintenance position.

1-3, the same reference numerals are used for like parts and structures, unless otherwise indicated. Although Figures 2A-2B and 3 illustrate the application of the invention in connection with a nozzle beam 14 located above the web W, the invention is equally applicable to a nozzle beam 14 'located below the web. In this case, the maintenance-30 kilos of maintenance and replacement work can be carried out from the floor level.

6

Figure 1 illustrates one prior art arrangement for positioning a nozzle bar of a water exchange device in connection with a tissue machine reel. In the figure, a web splitting bar 11 is disposed on the roller W for introduction of the web W, after which the web W is guided through a guide roll 12 via a runner component 13 which stabilizes the web 5 to the winding cylinder 10. The figure '. Also depicted in the figure is a dashed storage foot and dust removal 15. As shown in the figure, the spaces for positioning the nozzle bar of the water exchange device are quite narrow, which is further emphasized because there may also be runner components above the track. It is also apparent from the figure that in prior art stiffeners the nozzle beam 14; The location of the 14 'is such that maintenance cannot be performed while the machine is running.

Figures 2A-2B schematically illustrate an embodiment of the invention in a water web winding machine for a fiber web machine. The winder comprises a winding cylinder 10 through which the web W is wound around a winding shaft 16 through a winding nip formed around the winding cylinder 10 and the winding shaft 16. The web W is guided to the winding cylinder 10 from the guide roll 12. The web W is driven from the guide roll 12 20 to the winding cylinder 10 above a web nozzle bar 14 comprising nozzles 17 for providing a water jet to cut the web W when the roll rolls to the next winding axis. Preferably, the nozzle beam 14 is disposed near the point where the web W moves to the surface of the winding cylinder 10. The roller maintenance bridge 25 on which service person X stands while performing maintenance operations is designated by reference numeral 18. The nozzle bar 14 comprises a pivot 19 through which the nozzle palladd 14 is pivotally attached to the roller body structures (not shown), wherein the nozzle bar is rotatable can also be performed while driving the reel. The articulation 19 is disposed in the pivot center of the nozzle beam 30, whereby the water, air, electrical and other inputs of the water exchange device can be introduced into the beam near the pivot point without having to be removed during maintenance operations. Advantageously, the joint can be implemented as a flexible joint, which facilitates the export of inputs and increases the durability of the joint. The pivoting movement can be performed manually or via an actuator (not shown). Fig. 2A schematically illustrates the various steps of the pivoting movement and Fig. 2B shows the extreme positions of the pivoting movement - operating position T and service position H. With the nozzle bar 14 rotated to the service position H there are serviceable / replaceable parts attached to the nozzle bar 14, at service bridge 18 without Service Agent X within reach of moving parts of the reel. The pivoting member 14 of the nozzle-10 may be provided with a lock (not shown) for locking the nozzle beam 14 to a desired position, for example, a maintenance position H.

In an embodiment of the invention shown in Fig. 3, the nozzles 17 are pivotally mounted on the nozzle bar 14 of the water exchange device of the fiber web machine so that the nozzles 17 can be rotated from operating position T to service position H so that maintenance can also be performed. The turning movement may be performed manually or via an actuator (not shown). The articulation 19 is disposed in the pivot center of the nozzle 17, whereby water, air, and other similar inputs can be introduced into the beam in the vicinity of the pivot point without any special outlets and without having to be removed for maintenance operations. Advantageously, the joint can be implemented as a flexible joint, which facilitates the export of inputs and increases the durability of the joint.

The invention has been described above in connection with embodiments of the invention in which the nozzle bar 25 and / or the nozzles are pivotally mounted, whereby the movement between the service and operating positions takes place in a pivoting motion. The invention also encompasses applications in which the movement between the service and operating position is a displacement movement, typically a linear motion or a combination of a pivoting and displacement movement. The transfer means comprise guides to which the nozzle bar and / or nozzles are movably attached.

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The invention has been described above with reference only to some preferred examples thereof, the details of which, however, are not to be construed as being limited in any way.

Claims (11)

A water change device for cutting a fiber web in a wheelchair in a fiber web machine, said water changing device comprising a nozzle beam (14) and nozzles (17) attached to the nozzle beam to provide a water jet for cutting the web (W) in the wheelchair. when a web reel wound on a rolling shaft (16) becomes full or desirably large when skiing the reel to about the following rolling shaft (16), the nozzle beam (14) and / or the nozzles (17) of the water exchange device being secured by moving and / or pivoting means (19) in such a way that the nozzle beam (14) and / or the nozzles (17) can be pivoted and / or moved from a functional position (T) in which the cutting of the web takes place. a maintenance position (H) for carrying out during maintenance of the wheelchair measures for maintenance / replacement of nozzles (17) and / or parts attached to the nozzle beam (14) and to be maintained is replaced, characterized in that a reading is arranged in connection with the downhole position (H) of the nozzle beam (14) to ensure that the nozzle beam (14) is poured into the downhole position. 2. A water change device according to claim 1, characterized in that the parts 20 and / or the nozzles (17) to be maintained / exchanged on the nozzle beam (14) of the water change device in the wheelchair can be nosed by a service person (X) in the maintenance position (H). (18) or a corresponding undercarriage area and the undercarriage position (H) is positioned so that the service person (X) is out of reach of moving parts in the wheelchair. 25 3. A water change device according to claim 1 or 2, characterized in that the moving and / or pivoting means (19) comprise a conductor arrangement (19), by means of which the nozzle beam (14) and / or the nozzles (17) can be pivoted from the operating position (T ), in which the cutting of the web takes place, into the downhole position (H) so as to carry out during maintenance of the wheelchair the maintenance / replacement of nozzles (17) and / or parts attached to the nozzle beam (14) and to be maintained / exchanged. 4. A water change device according to any one of claims 1-3, characterized in that the conductor arrangement (19) for the nozzle beam (14) and / or the nozzles (17) of the water change device is placed in the center of oscillation of the oscillating movement from the operating position (T) to the maintenance mode (H). Water-changing device according to claim 1 or 2, characterized in that the moving and / or pivoting means (19) comprise guides on which the nozzle beam (14) and / or the nozzles (17) can be moved from the operating position (T), in which the cutting of the web takes place in the maintenance position (H) in order to carry out during maintenance of the wheelchair the maintenance / replacement of nozzles (17) and / or parts which are attached to the nozzle beam (14) and which must be maintained / replaced. A water change device according to any one of claims 1 to 5, characterized in that a function device 20 is provided in order to provide for oscillating and / or oscillating the nozzle beam (14) and / or the nozzles (17). and / or the movement of movement from the operating position (T) to the maintenance position (H). A water change device according to claim 6, characterized in that the functional device is a pneumatic cylinder or a hydraulic cylinder or an electric motor or a pneumatic motor. Water change device according to any of claims 1-7, characterized in that the operating position (T) of the water change device in the wheelchair in the fiber web machine for the placement is such that the nozzles (17) are located near the place where the web (W) arrives at the surface. of the milling cylinder (10). 9. A water change device according to any one of claims 1-8, characterized in that the water change device is a water change device in a wheelchair in a soft paper machine. Waterproofing device according to any one of claims 1-9, characterized in that the nozzle beam (14) in the water skid device is positioned above the web (W). 11. A waterproofing device according to any one of claims 1 to 9, characterized in that the nozzle beam (14) in the water-changing device is placed below the web (W).