Paper winding machine with purification device

Abstract

The invention relates to a paper winding machine (30) with a cleaning device (20), where the paper winding machine (31) comprises a rotatable winding cylinder (31), a support structure (32, 33) configured to support the winding cylinder (31) at each end of the winding cylinder (31). The cleaning device (20) is configured to clean a surface of the winding cylinder (31), and the cleaning device (20) comprises a beam (13) extending in a longitudinal direction of the winding cylinder (31) at a distance from the winding cylinder (31), and at least one cleaning nozzle (24, 25) is movably attached to the beam (13) along the beam (13). The invention also relates to an improved paper winding machine (30) with a cleaning device (20).

Description

Technical Field

[0001] The present invention relates to a reel for winding a fiber web. In particular, the present invention relates to a reel having a cleaning device. Background Art

[0002] As is known, fiber webs, such as paper or board webs, are manufactured in a plurality of machines that together form a fiber web production line, which may be hundreds of meters long. A modern paper machine can produce more than 450,000 tons of paper per year. The speed of a paper machine can exceed 2000 m / min and the width of the paper web can exceed 11 meters.

[0003] As is known from the prior art, fiber web production processes usually include an assembly formed by several devices arranged in succession in a production line. A typical production and processing line includes a headbox, a wire section and a press section followed by a drying section and a reel. The production and processing line may further include finishing equipment, such as a calender and / or a coater. The production and processing line also usually includes at least one slitter-winder for forming a customer roll and a roll packaging apparatus.

[0004] In a fiber web production line, the production operation is a continuous process. The finished fiber web output from the machine is wound with a reel around a winding shaft (i.e. reel) into a parent roll (machine roll), the diameter of which can exceed 5 meters and the weight of which can exceed 160 tons. The purpose of winding is to convert the fiber web from its flat manufacturing form into a form that is easier to handle. At the reel located in the main line, the continuous process of the line is interrupted for the first time, after which the process continues in stages. Every effort is made to connect these stages as smoothly as possible so that the work already performed is not wasted.

[0005] Reels are used in fiber web production to wind up a fiber web coming from a fiber web production line, a coater, a calender or corresponding finishing equipment.

[0006] Thus, a reel is a device that winds up a material (which is produced as a continuous full-width fiber web in a fiber web production line) in the form of a roll (parent roll). In the production process of a fiber web, winding is usually the first process section, where the continuous process is interrupted to continue in sequence. The parent roll is formed around a winding shaft that serves as a core for winding, i.e. the fiber web on one parent roll around one winding shaft has a start end and an end end.

[0007] At the reel, the continuous processing of the machine is interrupted for the first time, after which the processing continues in stages. In the reel, the parent roll is formed around a winding shaft (also commonly called a reel) operating as a winding core, i.e. the fiber web on one parent roll has a starting end and an ending end. The reel usually comprises a reeling cylinder and two pairs of carriages or two pairs of forks or a pair of carriages and a pair of forks, one for each end of the winding shaft / parent roll, for moving and supporting the winding shaft and the parent roll to be wound. During winding, the web is wound around the winding shaft to the parent roll with the help of a winding nip formed between the winding cylinder and the parent roll. In most prior art arrangements, the winding shaft rotates on a guide supported by its rotaing bearing housing during winding.

[0008] During winding, the surface of the winding cylinder can become contaminated, especially in cases where the fiber web to be wound is made of recycled fiber material. Therefore, the surface of the winding cylinder needs to be cleaned regularly. Usually, the surface of the winding cylinder is cleaned manually during stops of the reel by means of a high-pressure washer using a cleaning liquid, usually with the aid of a solvent substance, and / or by replacing a cleaning blade in place of a scraper of the winding cylinder. This is time-consuming and the cleaning liquid, especially containing solvent substances, can lead to unhealthy working conditions. Furthermore, manually operating a high-pressure washer can lead to unnecessary wetting of other parts of the reel and its surroundings.

[0009] During winding, when the parent roll has been wound to its maximum diameter and is finished, a turn-up is performed to end the winding of the finished parent roll and to start winding a new parent roll around a new winding shaft or similar winding core. In the turn-up, the fiber web is usually cut so that a wedge-shaped tip is formed to the web by one or two cutting devices and the final end end (i.e. the tail) of the fiber web is attached to the surface of the finished parent roll, while the starting end (i.e. the tip) of the fiber web is attached to the new winding shaft. In order to attach the tail of the fiber web to the surface of the finished parent roll, it is known from the prior art to add an adhesive, such as glue, on the surface of the parent roll or on the surface of the fiber web near the edge of the fiber web just before the turn-up. For this purpose, an attachment device connected to the winder is arranged.

[0010] From the prior art, it is known to use water jet cutting devices for cutting fiber webs in roll-up. For example, in European patent publication 2812268, a web roll-up cutting device for a continuous web traveling in the direction of travel is disclosed, the device comprising: a first nozzle connectable to a first water supply hose and adapted to produce a first water cutting jet, and a second nozzle connectable to a second water supply hose and adapted to produce a second water cutting jet, each of the first nozzle and the second nozzle being mountable on a respective nozzle bracket and movable transversely relative to the direction of travel of the continuous web. Moreover, for example, in European patent publication 0765832, a device for winding a fiber web, a paper or a paperboard web is disclosed. The device comprises a winding cylinder and a winding shaft (reel), the web being adapted to pass through a nip between the cylinder and the winding shaft to the winding shaft. The device also comprises a replacement device (roll-up device), which comprises a displaceable water cutting nozzle and a displaceable adhesive nozzle. The replacement device comprises a sledge, and a water jet nozzle and an adhesive nozzle are attached to the sledge. The sled can be moved along the guide so that the water cutting nozzle and the adhesive nozzle are operated substantially simultaneously and are placed in relative positions so that the water cutting nozzle and the adhesive nozzle are substantially parallel to each water cutting at a uniform distance of the water cutting and an adhesive tape is formed on the side of the web passing on the finished mother roll (reel). In addition, for example, in European patent application publication EP3521220A1, a reeling method for winding a fiber web for a paper reel is disclosed, and the fiber web running in one direction is cut by means of two water jet nozzles moving substantially transversely relative to the running direction of the fiber web.

[0011] The object of the present invention is to create a paper reel with a cleaning device in which the disadvantages and problems of the prior art are eliminated or at least minimized.

[0012] A further object of the invention is to create a paper reel with a cleaning device, wherein disadvantages and problems, in particular related to the cleaning of the surface of the winding cylinder of the paper reel, are eliminated or at least minimized. Summary of the invention

[0013] In order to achieve the above objects and those described below, the purification device according to the present invention is mainly characterized by the following features. Further advantageous features and aspects of the present invention are also defined below.

[0014] According to the present invention, an improved paper winding machine includes a rotatable winding cylinder, a supporting structure and a turning device, wherein the supporting structure is configured to support the winding cylinder at each end of the winding cylinder, the turning device includes a beam, which extends in the longitudinal direction of the winding cylinder and is separated from the winding cylinder by a distance, and at least one liquid jet nozzle is movably attached to at least the beam along the beam, wherein the turning device is improved into a cleaning device, which is configured to clean the surface of the winding cylinder by replacing one or more liquid jet nozzles with one or more cleaning nozzles, or by providing at least one attached cleaning nozzle that can be moved along the beam to the turning device.

[0015] According to the present invention, the paper reel comprises a liquid supply connected to a purification device for supplying a purification liquid, usually water, to a purification nozzle, a pressure unit for supplying pressure to the purification nozzle, and a control unit for controlling the purification device.

[0016] According to the invention, the control unit comprises a cleaning program which provides for controlling the movement of the cleaning nozzle with a lateral movement during cleaning of the surface of the winding cylinder and for controlling the supply of cleaning liquid, advantageously water, to the cleaning nozzle.

[0017] According to an advantageous characteristic of the invention, the paper reel comprises drive means connected to the winding cylinder for the rotatable movement of the winding cylinder.

[0018] According to an advantageous feature of the invention, the control unit is connected to the drive means of the winding cylinder to provide a rotation of the winding cylinder during cleaning.

[0019] According to an advantageous feature of the invention, the cleaning nozzle is configured to move back and forth during cleaning, ie to reciprocate in a transverse direction, ie in the longitudinal direction of the winding cylinder, and to provide a cleaning spray to the surface of the rotating winding cylinder.

[0020] According to an advantageous feature of the invention, the decontamination spray is a wide spray, advantageously a shower-type spray or a fan-shaped spray.

[0021] According to an advantageous aspect of the invention, a liquid jet turn-up device already present on a paper reel is retrofitted into a cleaning device for cleaning the surface of the winding cylinder of the paper reel during the cleaning time during the stoppage of the paper reel by replacing the water jet cutting nozzle of the turn-up device with a cleaning nozzle. The cleaning nozzle is configured to provide a cleaning water spray which is advantageously significantly wider than the cutting water jet. The cleaning water spray is advantageously a high-pressure spray with a maximum pressure of 2000 bar. Thus, no solvent substances are required, but the surface of the winding cylinder is effectively cleaned by the cleaning liquid, or even by water alone.

[0022] According to an advantageous aspect of the invention, the winding cylinder is configured to rotate during cleaning and the control unit is used to control the cleaning nozzle to have a lateral, slow movement during cleaning of the winding cylinder surface. The control unit is advantageously programmed to perform cleaning without operator control.

[0023] According to an advantageous aspect of the invention, in case the surface of the winding cylinder has one or more contaminated areas which are difficult to clean, the control unit is advantageously programmed to provide a special cleaning program for the one or more difficult to clean areas.

[0024] According to an advantageous aspect of the invention, in a linear reel, the winding cylinder is moved in a substantially vertical direction and, for cleaning, is moved into a cleaning position at a desired height.

[0025] In the present specification, water is mentioned as the washing or cutting medium for the nozzle, but it is clear to a person skilled in the art that any suitable liquid for cutting may be used as the washing or cutting medium for the nozzle.

[0026] By means of the reel with a cleaning device according to the invention and its advantageous features, a number of advantages are achieved: The time required for cleaning the winding cylinder surface provided by the invention is predictable, so that cleaning and other operations required during the stoppage of the reel can be optimized. Since the invention provides that the operating and / or maintenance personnel do not need to manually clean the surface of the winding cylinder, the operating and / or maintenance personnel can carry out other operations that need to be performed during the stoppage, so that the stoppage time can be reduced. The cleaning of the winding cylinder surface can be done with water only as cleaning liquid, and no solvents are required. In addition, the area of ​​the reel affected by the cleaning liquid is minimized. Moreover, the invention provides reliable cleaning results without the risk of human errors, so that a more improved runnability is achieved in the subsequent further steps of the fiber web production. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Aspects of the present invention together with additional objects and advantages thereof will be best understood from the following description of certain exemplary embodiments when read in conjunction with the accompanying drawings, and the invention is described in more detail hereinafter with reference to the accompanying drawings, in which:

[0028] Figure 1 An advantageous example of a paper reel with a cleaning device according to the invention is schematically shown.

[0029] [List of Reference Numerals]

[0030] 10Rolling device

[0031] 13 beam

[0032] 14Liquid jet nozzle

[0033] 15Liquid Jet Nozzle

[0034] 16Liquid supply unit

[0035] 17Control Unit

[0036] 18 pressure units

[0037] 20Purification device

[0038] 24 purification nozzles

[0039] 25 purification nozzles

[0040] 30 paper roll machine

[0041] 31 Winding cylinder

[0042] 32Support structure

[0043] 33Support structure

[0044] 34 Surface of winding cylinder

[0045] 35 Support Leg

[0046] 36 Support Legs

[0047] 37 Guidance Department DETAILED DESCRIPTION

[0048] According to the different views showing the present invention, during the description process of the drawings, the same numerals and symbols will be used to identify the same elements. For the sake of clarity, some repeated reference numerals may be omitted in the drawings.

[0049] exist Figure 1 Schematically in FIG is shown an advantageous example of a cleaning device 20 of a reel 30 for winding a fiber web. In the reel 30, a full width fiber web from a preceding process step, for example from the dryer section of a fiber web production line, is wound around a reel shaft to a parent reel by means of a winding nip between the reel to be formed around the reel shaft and a winding cylinder 31. The winding cylinder 31 is rotatably supported at each end on a support structure 32, 33.

[0050] According to one example, the cleaning device 20 is modified from a liquid jet turn-up device 10, typically a water jet turn-up device 10, for a paper reel 30. The turn-up device comprises two liquid jet nozzles, typically water jet nozzles 14, 15, which are movably attached to a guide 37, the position of which is connected to a beam 13, which extends in the transverse direction of the fiber web and in the longitudinal direction of the winding cylinder 31 and is spaced from the surface 34 of the winding cylinder 31. The beam 13 is advantageously supported at least at each end on a respective support leg 35, 36. Alternatively, the beam 13 can be supported on other nearby supporting elements of the paper reel 30 or on nearby equipment. The turn-up device 10 further comprises a liquid supply 16 for supplying cutting liquid (usually water) to the liquid jet nozzles 14, 15, a pressure unit 18 for supplying pressure to the liquid jet nozzles 14, 15, and a control unit 17 for controlling the turn-up device 10 (liquid jet nozzles 14, 15, liquid supply 16 and pressure unit 18) during the turn-up. The control unit 17 can be formed as an independent unit or as part of the control system of the paper reel 30. In order to improve the turn-up device 10 into a cleaning device 20, the liquid jet nozzles 14, 15 are replaced by cleaning nozzles 24, 25 for cleaning the surface of the winding cylinder 31 during the winding interruption of the paper reel. Alternatively, in order to improve the reeling device 10 into a cleaning device 20, in addition to the liquid jet nozzles 14, 15, cleaning nozzles 24, 25 are provided for cleaning the surface of the winding cylinder 31 during the winding interruption of the paper reel, in which arrangement the liquid supply for the liquid jet nozzles 14, 15 or for the cleaning nozzles 24, 25 is selected, for example, by a valve. The liquid supply 16 can also have a connection to a cleaning substance supply to provide the cleaning substance into the liquid in the liquid supply 16. When an existing liquid jet turning-over device 10 already at a reel 30 is modified into a cleaning device 20 for cleaning the surface of the winding cylinder 31 of the reel 30 during the stop / interruption of the reel 30 by replacing the liquid jet cutting nozzles 14, 15 of the turning-over device 10 with cleaning nozzles 24, 25 or by adding cleaning nozzles 24, 25 to the turning-over device 10, the cleaning nozzles 24, 25 are configured to provide a cleaning liquid spray, advantageously a cleaning water spray, which is advantageously significantly wider than the cutting liquid jet. The cleaning spray is a wide-width spray, advantageously a shower-type spray or a fan-shaped spray. For the cleaning liquid spray, the pressure is reduced. The cleaning liquid spray is pressurized by the pressure unit 18 to a high-pressure spray with a maximum pressure of 2000 bar. The turning-over device 10 can also include a device for stopping the cutting of the liquid jet nozzle at a selected time. These devices can also be used in the cleaning device 20 to stop the cleaning liquid spray at a selected time. These devices are advantageously connected to the control unit 17. The means for stopping the cutting or cleaning of the nozzles 14 , 15 , 24 , 25 comprise control and actuation means for the nozzles 14 , 15 , 24 , 25 .The means for stopping the liquid inlet to the nozzles 14, 15, 24, 25 comprise at least one shut-off switch for supplying pressurized gas to the pressure unit 18, or at least one pressure reducing valve, or at least one mechanical device, or at least one device to change the nozzle cutting direction.

[0051] According to another example, the cleaning device 20 is provided for a paper reel 30 without a liquid jet turn-up device 10. The cleaning device 20 comprises two cleaning nozzles 24, 25, which are movably attached to a guide 37, the position of which is connected to a beam 13, which extends in the transverse direction of the fiber web and in the longitudinal direction of the winding cylinder 31 and is spaced from the surface 34 of the winding cylinder 31. The beam 13 is advantageously supported at least at each end on a respective support leg 35, 36. Alternatively, the beam 13 can be supported on other nearby supporting elements of the paper reel 30 or nearby equipment. The cleaning device 20 also includes a liquid supply 16 for supplying cutting liquid (usually water) to the cleaning nozzles 24, 25, a pressure unit 18 for providing pressure to the cleaning nozzles 24, 25, and a control unit 17 for controlling the cleaning device 20 (cleaning nozzles 24, 25, liquid supply 16 and pressure unit 18) during cleaning. The control unit 17 may be formed as a separate unit or as part of the control system of the paper reel 30. The liquid supply 16 may also have a connection to a supply of a cleaning substance to provide the cleaning substance into the liquid in the liquid supply 16. The cleaning nozzles 24, 25 are configured to provide a cleaning liquid spray, advantageously a cleaning water spray, which is advantageously a wide spray. The cleaning spray is a wide spray, advantageously a shower-type spray or a fan-shaped spray. The cleaning liquid spray is pressurized by the pressure unit 18 to a high-pressure spray with a maximum pressure of 2000 bar. The cleaning device 20 may also include means for stopping the cleaning of the cleaning nozzles 24, 25 at a selected time. These means are advantageously connected to the control unit 17. Therefore, the means for stopping the cleaning of the nozzles 24, 25 include control and actuation means for the nozzles 24, 25. The means for stopping the cleaning liquid inlet of the nozzles 24, 25 include at least one shut-off switch for supplying pressurized gas to the pressure unit 18, or at least one pressure reducing valve, or at least one mechanical device, or at least one device to change the nozzle cutting direction.

[0052] The winding cylinder 31 is configured to rotate during cleaning by the cleaning device 20. In order to rotate the winding cylinder 31, the drive means of the winding cylinder is used. The control unit 17 includes a cleaning program, which is arranged to control the movement of the cleaning nozzles 24, 25 to have a lateral, slow movement during the cleaning of the winding cylinder surface, and to control the supply of cleaning liquid (advantageously water) to the nozzles. The control unit 17 is also connected to the drive means of the winding cylinder 31 to provide rotation of the winding cylinder 31 during cleaning. Therefore, the control unit 17 is advantageously programmed to perform cleaning without operator control.

[0053] In case the surface of the winding cylinder 31 has one or more contaminated areas which are difficult to clean, the control unit 17 has an additional cleaning program which is programmed to provide a cleaning program for the one or more difficult to clean areas.

[0054] During cleaning, the cleaning nozzles 24, 25 move back and forth, i.e. reciprocate in the transverse direction (i.e. in the longitudinal direction of the winding cylinder 31), and provide cleaning spray to the surface of the rotating winding cylinder 31. Therefore, the entire circumferential surface of the winding cylinder 31 can be cleaned.

[0055] In the foregoing description, although some functions have been described with reference to certain features, these functions may be performed by other features, whether described or not. Although features have been described with reference to certain embodiments or examples, those features may also be present in other embodiments or examples, whether described or not. The invention has been described above with reference to some advantageous examples, but the invention is not narrowly limited to these examples. Many modifications and variations are possible in the invention as defined in the following claims.

Claims

1. An improved paper reel (30) with a cleaning device (20), wherein the paper reel (30) comprises a rotatable winding cylinder (31), a support structure (32, 33) and a reeling device (10), wherein the support structure is configured to support the winding cylinder (31) at each end of the winding cylinder (31), the reeling device (10) comprises a beam (13), the beam (13) extends in the longitudinal direction of the winding cylinder (31) and is spaced a distance from the winding cylinder (31), and at least one liquid jet nozzle (14, 15) is movably attached to at least the beam (13) along the beam (13), characterized in that The reeling device (10) is improved into a cleaning device (20), the cleaning device (20) being configured to clean the surface of the winding cylinder (31) by replacing one or more of the liquid jet nozzles (14, 15) with one or more cleaning nozzles (24, 25), or by providing at least one attached cleaning nozzle (24, 25) movable along the beam (13) to the reeling device (10), wherein the paper reel (30) comprises a liquid supply portion (16), a pressure unit (18) and a control unit (17), the liquid supply portion (16) being connected to the cleaning unit (18). The invention relates to a cleaning device (20) for supplying a cleaning liquid, typically water, to the cleaning nozzles (24, 25), the pressure unit (18) for supplying pressure to the cleaning nozzles (24, 25), the control unit (17) for controlling the cleaning device (20), and wherein the control unit (17) comprises a cleaning program, which provides for controlling the movement of the cleaning nozzles (24, 25) with a lateral movement during cleaning of the surface (34) of the winding cylinder (31) and for controlling the cleaning liquid, advantageously water, supplied to the cleaning nozzles (24, 25).

2. The paper reel (30) with the purification device (20) according to claim 1, characterized in that: The paper reel (30) comprises a drive device connected to the winding cylinder (31) for the rotatable movement of the winding cylinder (31).

3. The paper reel (30) with the purification device (20) according to claim 2, characterized in that: The control unit (17) is connected to the drive means of the winding cylinder (31) to provide rotation of the winding cylinder (31) during cleaning.

4. A paper reel (30) with a cleaning device (20) according to any one of the preceding claims, characterized in that During cleaning, the cleaning nozzles (24, 25) are configured to move back and forth, i.e. reciprocate in a transverse direction, i.e., in a longitudinal direction of the winding cylinder (31), and provide cleaning spray to the surface of the rotating winding cylinder (31).

5. The paper reel (30) with the purification device (20) according to claim 4, characterized in that: The decontamination spray is a wide-width spray, advantageously a shower-type spray or a fan-shaped spray.

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