Classifications

• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
  • D21F1/00—Wet end of machines for making continuous webs of paper
  • D21F1/32—Washing wire-cloths or felts
  • D21F1/325—Washing wire-cloths or felts with reciprocating devices
• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
  • D21F1/00—Wet end of machines for making continuous webs of paper
  • D21F1/34—Construction or arrangement of spraying pipes

Definitions

• the invention relates to a device for cleaning an endlessly revolving in the running direction covering in a machine for producing or processing a paper, cardboard, tissue or another fibrous web, with a housing and a cleaning head, which is at least partially surrounded by the housing and with at least one first and at least one second nozzle device respectively arranged on the cleaning head for acting on the clothing with cleaning medium, the two nozzle devices each having a plurality of nozzle openings for generating parallel cleaning jets.
• the European patent application EP1884588 A2 describes a cleaning device for cleaning an endlessly circulating conveyor belt with two, each having at least one cleaning nozzle having cleaning heads for acting on the conveyor belt with cleaning medium.
• the cleaning nozzles are arranged such that the cleaning medium as a jet inclined at an angle, on the one hand and on the other in the running direction of the conveyor belt, this impinges. Between the cleaning nozzles is a suction channel is provided for the removal of the detached dirt.
• nozzles are provided for generating a liquid jet, which are combined to form at least one nozzle assembly and the nozzle assembly is arranged to be displaceable in the direction of a rotation axis of a web guide and at least two nozzles are arranged at an angle to each other.
• these devices have a high equipment and energy costs and are susceptible to contamination.
• This object is solved by the features of claim 1. It is a device for cleaning a continuous circumferential in the running direction covering in a machine for producing or processing a paper, cardboard, tissue or another fibrous web provided with a housing and a cleaning head, which is at least partially surrounded by the housing and with at least one first and at least one second nozzle device respectively arranged on the cleaning head for acting on the clothing with cleaning medium, the two nozzle devices each having a plurality of nozzle openings for generating parallel cleaning jets.
• the number of nozzle openings of the at least one first nozzle device and the at least one second nozzle device is in each case greater than or equal to 3, in particular greater than or equal to 5, and the nozzle openings of the at least one first nozzle device and the at least one second nozzle device have a diameter between 0.1 mm and 0.6 mm, in particular between 0.1 mm and 0.4 mm and the distance of the nozzle openings within the at least one first and within the at least one second nozzle device transversely to the direction at least zonewise between 1 mm and 4 mm or the distance between the adjacent nozzle openings of the at least one first and the at least one second nozzle device is between 1 mm and 4 mm transversely to the direction of travel.
• the minimum number of nozzles in a nozzle device allows, for example, during the traversing of the device transversely to the running direction of the circumferential covering a sufficient cleaning coverage at usual Traversier füren.
• the close spacing of the nozzle openings makes it possible to clean the surface structure of the typical coverings of machines for producing or processing a paper, board or tissue web.
• the cleaning jets are at least parallel in the direction of travel and thus have a small distance from each other at the impact point on the clothing.
• small nozzle cross sections are sufficient for a very good cleaning effect.
• Filets and woven fabrics such as press felts, forming fabrics and dryer fabrics can thus be cleaned efficiently, even with a depth effect, of contaminants or they can be removed from the surface.
• the at least one first and at least one second, respectively arranged on the cleaning head, nozzle device may be arranged one behind the other or side by side in the running direction. In both cases, the nozzles of the nozzle devices are arranged so that the cleaning jets generated by the nozzles of the at least one first and at least one second nozzle device impinge offset in the running direction of the fabric.
• the nozzles of the nozzle devices are supplied with cleaning fluid by a single cleaning head.
• the nozzles are mechanically connected to the cleaning head, for example by a screw.
• a compact design of the device also has the advantage of only a small surface exposed to the spray.
• the housing is not evacuated and there is substantially ambient pressure inside the housing. It may be expedient if the housing is open on the side facing the clothing and on the opposite side. This reduces the tendency of the housing inside to become soiled.
• the cleaning jets of the at least one first and the at least one second nozzle device each form an angle W1, W2 for circumferential covering in the range of 25 ° to 70 °, preferably in the range of 35 ° to 50 °. In this angular range, the fabrics can be cleaned very effectively with minimal spray formation. Furthermore, it is advantageous if the cleaning jets of the at least one first nozzle device are aligned counter to the running direction of the circumferential covering and the cleaning jets of the at least one second nozzle device in the running direction of the circumferential covering. This improves the depth effect of cleaning.
• the direction of the cleaning jets of the at least one first nozzle device is directed away from the direction of the cleaning jets of the at least one second nozzle device.
• the course of the cleaning jets is therefore divergent. This prevents, in particular in a compact design, a mutual influence of the cleaning jets and prevents accumulation of dirt particles inside the housing.
• the cleaning jets are therefore preferably directed to the housing wall.
• the at least one first nozzle device and / or the at least one second nozzle device comprise a plurality of side by side, preferably arranged in the transverse direction of the circumferential covering individual nozzles.
• Single-jet nozzles are characterized in that only one nozzle opening is present in a nozzle.
• further first nozzle devices and / or further second nozzle devices are preferably provided, which are arranged one behind the other in the running direction of the revolving clothing.
• the at least one first nozzle device and / or the at least one second nozzle device comprises at least one multi-jet nozzle.
• the nozzle has a plurality of nozzle openings, preferably arranged in a line. As a result, narrow-spaced cleaning jets can be produced with a small size.
• the at least one first nozzle device comprises two multi-jet nozzles each having equal to or more than 3, preferably more than 4, in particular more than 5 nozzle openings and the at least one second nozzle device three multi-jet nozzles each equal to or more than 3, preferably more than 4, in particular more as 5 nozzle openings (10.2).
• the at least one first nozzle device comprises three multi-jet nozzles each having equal to or more than 3, preferably more than 4, in particular more than 5 nozzle openings and the at least one second nozzle device two multi-jet nozzles each equal to or more than 3, preferably more than 4, in particular more as 5 nozzle openings.
• ratios 2/3 and 3/2 are already mentioned for a compact and lightweight cleaning device. There are also other ratios, such as 1/1, 2/1; 1/2; 4/3; 3/4; 4/5; 5/4 etc. conceivable.
• the distance, transverse to the running direction of the circumferential covering, of the nozzles of the at least one first nozzle device is equal to the distance of the nozzles of the at least one second nozzle device. This allows a uniform cleaning profile of the circumferential covering.
• the nozzles of the at least one first nozzle device to the nozzles of the at least one second nozzle device are arranged offset transversely to the running direction of the circumferential clothing preferably by half the distance of the nozzles. This also allows a uniform cleaning profile of the circumferential covering, since overlaps or irregular gaps of the cleaning jets are avoided.
• the distance AK of the cleaning head to the circumferential clothing is adjustable.
• the cleaning intensity can be adapted to the requirements under different operating conditions.
• the distance AG of the housing is adjustable to the circumferential covering.
• the housing prevents the spread of reflected spray.
• the spray can be controlled and minimized and the environment is not polluted.
• the distance AG of the housing can be adjustable for circumferential covering, regardless of the position of the cleaning head.
• the cleaning effect and the spray formation can be influenced independently of each other.
• the nozzles are preferably exposed to cleaning medium at a pressure between 50 bar and 300 bar.
• the nozzle spacing to the circumferential covering is advantageously between 5 mm and 100 mm.
• the housing can be formed in a cross-section parallel to the clothing plane streamlined, for example, teardrop-shaped with respect to the current flowing through the fabric air layer.
• the cleaning head can be arranged rotated about an axis perpendicular to the clothing plane, so that the adjacent nozzle openings of the nozzles of the at least one first and at least one second nozzle device are each arranged on a line which extends at an angle of attack transversely to the direction of travel.
• the cleaning jets viewed in the running direction, impinge at an angle of incidence preferably between less than 90 ° and 45 °, in particular between 85 ° and 60 °.
• the cleaning effect of the surface structures of different textures is improved.
• multi-jet nozzles in the at least one first and / or at least one second nozzle device these can also be arranged rotated so that thereby the cleaning jets impinge on the fabric at an angle of incidence in the direction of travel.
• the angle of incidence is preferably between less than 90 ° and 45 °, in particular between 85 ° and 60 °.
• the adjacent nozzle openings of the nozzles or multi-jet nozzles of the at least one first and at least one second nozzle device arranged in each case on a line which extends transversely to the running direction.
• the angle of incidence of the cleaning jets is, as seen in the running direction, 90 °.
• cleaning chemicals for cleaning the press felts can be saved, for example in the press section. Likewise, cleaning stops the paper machine less often required. This also increases safety and runnability through fewer breaks. In addition, the performance of the press felts is maintained longer and their life is increased.
• a system comprising a device according to the invention for cleaning an endlessly revolving in the running direction covering a machine for producing or processing a paper, cardboard, tissue or other fibrous web, as well as a traverse on which the device is traversable relative to the clothing in a transverse direction transverse to the direction of travel, that is traversed.
• the traverse can be designed such that it at least partially spans the clothing in the transverse direction and is preferably arranged relative to the clothing so that it lies opposite the side of the clothing to be cleaned by means of the apparatus.
• a storage and a drive may preferably be provided, which may be associated with the system, for example, to move the device according to the invention in the transverse direction along the traverse back and forth.
• a use of the device according to the invention or of the system according to the invention in a machine for Production or processing of a paper, cardboard, tissue or another fibrous web may be provided.
• a machine for producing or processing a paper, board, tissue or another fibrous web comprising at least one continuous endless belting in the running direction and a device or a system according to the invention.
• FIG. 1 shows a first embodiment of a device according to the invention with a first and a second nozzle device
• Figure 2 is a view from the clothing side on the device of the figure
• FIG. 3 shows patterns of cleaning lines of the device according to FIG. 1;
• FIG. 4 shows a second embodiment of a device according to the invention with three first nozzle devices and three second nozzle devices;
• Figure 5 is a first pattern of cleaning lines of the device of Figure 4.
• FIG. 6 is a second pattern of cleaning lines of the device of Figure 4;
• FIG. 1 shows a first embodiment of a device 1 according to the invention for cleaning a covering 6 that revolves endlessly in the running direction 5 in a machine for producing or processing a paper, board, tissue or another fibrous web with a first and a second nozzle device 4.1. 4.2 with a housing 3 and a cleaning head 2, which is surrounded by the housing (3) at least partially.
• the cleaning head 2 is supplied via the cleaning medium inlet 7 with cleaning medium.
• the first and the second nozzle device (4.1, 4.2) are each arranged on the one cleaning head and comprise a plurality of nozzles, which in the present case each have a plurality of nozzle openings 10.1, 10.2, as shown in FIG.
• the nozzles are designed as multi-jet nozzles 8.1, 8.2.
• a nozzle has several openings, which are arranged transversely to the direction.
• the first nozzle device 4.1 has three multi-jet nozzles 8.1 and the second nozzle device 4.2 two multi-jet nozzles 8.2.
• the number of nozzle openings 10.1, 10.2 of the first nozzle device 4.1 in this example per nozzle is six, in total therefore eighteen nozzle openings 10.1.
• the second nozzle device 4.2 has twice six nozzle openings 10.2.
• the distance between the nozzle openings 10.1, 10.2 within the first and within a second nozzle device transversely to the direction is zonal, that is, within a multi-jet nozzle 8.1, 8.2, between 1 mm and 4 mm. Outside this zone, that is between the nozzles 8.1, 8.2 of the first nozzle device
• the distance is much larger.
• the nozzles 8.1, 8.2 of the first and the second nozzle device 4.1, 4.2 are arranged offset from one another such that the cleaning jets 12 of the nozzles 8.1,
• the nozzle openings of the first nozzle device 4.1 and the second nozzle device 4.2 have a diameter between 0.1 mm and 0.6 mm, in particular between 0.1 mm and 0.4 mm. In a practical case, the diameter is 0.2mm.
• the nozzles 8.1, 8.2 of the nozzle devices 4.1, 4.2 are supplied with cleaning fluid by a single cleaning head 2.
• the nozzles 8.1, 8.2 are mechanically connected to the cleaning head 2, for example by a screw.
• This compact design of the device 1 also has the advantage of only a small surface exposed to the spray.
• the combination of features described enables an efficient cleaning of clothing with at the same time low energy consumption and water consumption.
• the minimum number of nozzle openings 10.1, 10.2 in a nozzle device 4.1, 4.2 allows, for example, during the traversing of the device transversely to the direction of the circumferential covering a sufficient cleaning coverage at usual Traversier füren.
• the close spacing of the nozzle openings 10.1, 10.2 makes it possible to clean the surface structure of the typical coverings 6 of machines for producing or processing a paper, board or tissue web. This is further supported by the fact that the cleaning jets 12 are parallel at least seen in the running direction 5 and thus at the point of impact on the fabric 6 have a small distance from each other. By this arrangement, small nozzle cross-sections are sufficient for a very good cleaning effect.
• This angle W1, W2 allows effective cleaning with minimal fogging on many fabrics.
• the cleaning jets 12 of the first nozzle device 4.1, 4.1 1, 4.12 are opposite to the running direction (5) of the circumferential covering 6 and the cleaning jets 12 of the second nozzle device 4.2, 4.21, 4.22 are aligned in the running direction 5 of the circumferential covering 6. This improves the depth effect of cleaning.
• the cleaning jets 12 thus run transversely to the running direction 5, divergent, that is, they are directed away from one another. This prevents, in particular in a compact design, a mutual influence of the cleaning jets and prevents accumulation of dirt particles inside the housing.
• the cleaning jets are therefore preferably directed to the housing wall.
• the distance between the nozzles 8.1 of the first nozzle device 4.1, 4.1 1, 4.12 is equal to the distance between the nozzles 8.2 of the second nozzle device 4.2, 4.21, 4.22. This allows a uniform cleaning profile of the circumferential covering.
• the nozzles 8.1 of the first nozzle device 4.1, 4.1 1, 4.12 are arranged offset to the nozzles 8.2 of the second nozzle device 4.2, 4.21, 4.22 transversely to the direction 5 of the circumferential covering 6 by half the distance of the nozzles 8.1, 8.2. This also allows a uniform cleaning profile of the circumferential covering, since overlaps or irregular gaps of the cleaning jets are avoided.
• the distance AK of the cleaning head 2 to the circumferential covering 6 is adjustable.
• the cleaning intensity can be adapted to the requirements under different operating conditions.
• the distance AG of the housing 3 to the circumferential covering 6 is adjustable.
• the distance of the housing 3 and cleaning head 2 is independently adjustable.
• the Einsteilvorraumen may be spindle drives and clamping devices.
• the nozzle distance to the circumferential covering is in this example 80 mm, the distance of the housing at 10 mm.
• FIG. 2 shows a view from the clothing side onto the device 1 of FIG. 1. In this illustration, protective straps 9 can be seen, which are attached in the vicinity of the fabric 6 to avoid too deep immersion of the device 1 in the fabric in the event of malfunction or incorrect operation.
• FIG. 3 shows a pattern of cleaning lines 11, 11, 12 of the device according to FIG.
• the cleaning jets 12 of the first nozzle device 4.1 form six adjacent cleaning lines 1 1 .1 in three zones. In between are the cleaning lines 1 1 .2 the second nozzle device 4.2. All cleaning lines 1 1 .1, 1 1 .2 are spaced apart and do not touch, according to the arrangement of the nozzles 8.1, 8.2 and the nozzle openings 10.1, 10.2 of the two nozzle devices 4.1, 4.2. The distances are the same and in this example are 2 mm.
• FIG. 4 shows a second embodiment of a device 1 according to the invention with three first nozzle devices 4.1, 4.1 1, 4.12 and three second nozzle devices 4.2, 4.21, 4.22, which are arranged one behind the other in the direction of travel 5.
• all the nozzles 8.1, 8.2 of the first nozzle devices 4.1, 4.1 1, 4.12 and the second nozzle devices 4.2, 4.21, 4.22 consist of individual jet nozzles.
• Single-jet nozzles are characterized in that only one nozzle opening is present in a nozzle. These are arranged offset relative to one another within the respective nozzle devices 4.1, 4.1 1, 4.12, 4.2, 4.21, 4.22 transversely to the running direction 5.
• the cleaning jets 12 of the first nozzle devices 4.1, 4.1 1, 4.12 are opposite to the running direction (5) of the circumferential covering 6 and the cleaning jets 12 of the second nozzle devices 4.2, 4.21, 4.22 are aligned in the running direction 5 of the circumferential covering 6. This improves the depth effect of cleaning.
• the cleaning jets 12 of the three first nozzle devices 4.1, 4.1 1, 4.12 thus run transversely to the running direction 5, divergent to the three second nozzle devices 4.2, 4.21, 4.22, that is, they are directed away from one another. This prevents, especially in a compact design, a mutual influence of the cleaning jets and prevents an accumulation of dirt particles inside the housing.
• the cleaning jets are therefore preferably directed to the housing wall.
• the distance between the nozzles 8.1 of the first nozzle devices 4.1, 4.11, 4.12 transverse to the direction 5 is equal to the distance between the nozzles 8.2 of the second nozzle devices 4.2, 4.21, 4.22 transversely to the direction 5. This allows a uniform cleaning profile of the revolving fabric.
• the nozzles 8.1 of the first nozzle device 4.1, 4.11, 4.12 are arranged offset to the nozzles 8.2 of the second nozzle device 4.2, 4.21, 4.22 transversely to the direction 5 of the circumferential fabric 6. This also allows a uniform cleaning profile of the circumferential covering, since overlaps or irregular gaps of the cleaning jets are avoided.
• the offset can be different depending on the arrangement of the nozzles 8.1, 8.2, as can be seen in Figures 5 and 6 with reference to the cleaning lines 11.1, 11.11, 11.12, 11.2, 11.21, 11.22.
• Figure 1 With regard to further features and the adjustability of the cleaning head 2 and the housing 3, reference is made to the description of Figure 1.
• FIGS. 5 and 6 show various patterns of cleaning lines 11.1, 11.11, 11.12, 11.2, 11.21, 11.22 which can be produced with the device 1 according to FIG.
• the pattern of Figure 5 shows adjacent cleaning lines alternately from the first and second nozzle devices 4.1, 4.2.
• the distances between the cleaning lines 1.1, 11.11, 11.12, 11.2, 11.21, 11.22 are also constant and in this example are 2 mm.
• All cleaning lines 11.1, 11.11, 11.12, 11.2, 11.21, 11.22 are spaced apart and do not touch, according to the arrangement of the nozzles and the nozzle openings 10.1, 10.2 of the two nozzle devices 4.1, 4.2.
• the distance transversely to the running direction 5 between the adjacent nozzle openings (10.1, 10.2) of the first and the second nozzle device (4.1, 4.2) transversely to the running direction (5) is 2 mm. It does not matter which nozzle opening 10.1 of the first nozzle device 4.1 to which Nozzle opening 10.2 of the second nozzle assembly 4.2 is adjacent. In the example shown, seen in the running direction, the first nozzle opening 10.1 of the first nozzle device 4.1 of the first nozzle opening 10.2 of the second nozzle device 4.2 adjacent. In contrast, in FIG. 6 the three cleaning lines 11.1, 11.11, 11.12 of the cleaning jets 12 are adjacent to the first nozzle device 4.1.
• the distances between the cleaning lines 1.1, 11.11, 11.12, 11.2, 11.21, 11.22 are also constant and in this example are 2 mm.

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• Treatment Of Fiber Materials (AREA)
• Nozzles (AREA)
• Cleaning By Liquid Or Steam (AREA)

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Citations (5)

• 2014
  • 2014-09-23 CN CN201420549233.2U patent/CN204662172U/zh not_active Expired - Lifetime
  • 2014-12-16 WO PCT/EP2014/077889 patent/WO2015091432A1/de active Application Filing

Patent Citations (5)

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