WO2007059919A2

WO2007059919A2 - Device and method for cleaning a rotating material strip

Info

Publication number: WO2007059919A2
Application number: PCT/EP2006/011142
Authority: WO
Inventors: Mathieu Josef Maria Robberts
Original assignee: Robo Paper B.V.
Priority date: 2005-11-22
Filing date: 2006-11-21
Publication date: 2007-05-31
Also published as: DE112006003146A5; WO2007059919A3

Abstract

The invention relates to a device for cleaning a rotating material strip, such as drying screenings, with the aid of cleansers arranged in front of a rotating material strip in such a way that they are rotatable about an axis of rotation. In order to remove the cleanser dirties from the material strip, the inventive device is characterised in that the rotatable cleansers are placed in a vacuum chamber.

Description

Device and method for cleaning a circumferential material web

[01] On the one hand, the invention relates to a device for cleaning a circulating material web, such as a dryer fabric with cleaning agents, which are arranged so as to rest against the rotating material web around a rotation axis. On the other hand, the invention relates to a method for cleaning a circulating material web, such as a drying wire, in which impurities are released from the circulating material web by means of rotating cleaning means, such as brushing means, lying against the circulating material web.

[02] A large number of devices exist in the state of the art in order to clean up surrounding material webs, which may constitute a carrier belt or a conveyor belt, in particular in the field of papermaking.

For example, DE 198 60 567 A1 discloses a method and a device for cleaning a conveyor belt, in which the conveyor belt is cleaned in the region of a deflection roller by means of a cleaning medium which emerges from cleaning nozzles. The cleaning nozzles are in this case housed in a suction bell, which is arranged at a distance above the conveyor belt. An extraction line is additionally arranged on the suction bell, by means of which dirt and cleaning agent residues dissolved from the material web are sucked out of the suction bell. For this purpose, the suction is connected to a suction device, wherein by means of the suction device, if necessary, the suction power can be varied. The cleaning device described here is well suited to cleaning a wide variety of conveyor belts, in particular from the paper and / or board industry.

[0002] Furthermore, German Offenlegungsschrift DE 196 27 973 A1 describes a cleaning device by means of which a roll of a paper machine is cleaned. For this purpose, a single suction cup is arranged in front of the roller. The single suction cup is arranged on a traversing trolley so that the suction bell travels back and forth along the roller and in the process can extract dissolved dirt from the surface.

[04] Also in the published patent application DE 195 48 893 Al a Re ing device is described in which a single suction cup is moved traversing transverse to a drying wire. The suction cup surrounds a nozzle head, from which a liquid jet is directed onto the drying wire. By means of the single suction cup dirt particles and residual water can be removed from the cleaning area.

[05] Also described in the utility model DE 295 03 752 Ul a cleaning device which has a single suction cup, which is traversing moved transversely to a Trockensiebband. By means of the suction cup dirt particles and residual water can advantageously be removed without the risk that dirt particles or residual water passes in large quantities outside of the suction chamber of each suction cup.

[06] A generic cleaning device is also described in DE 693 14 805 T2, in which a single nozzle head is moved back and forth in relation to a roller to be cleaned. By means of the nozzle head, on the one hand detergent jets are applied to the surface to be cleaned and on the other hand, dissolved dirt and residual water from the cleaning area are sucked through the nozzle head.

[07] A cleaning device with a similar nozzle head is described in EP 1 358 949 A2. This cleaning device also comprises a single nozzle head, in which nozzles for discharging cleaning jets are arranged. Again, dissolved dirt and residual water are sucked through the nozzle chamber. This device also works with a single nozzle head which is reciprocated against a surface to be cleaned on a traversing device.

[08] All of the above cleaning methods clean a band well, but have the common disadvantage that a band to be cleaned becomes heavily soaked during cleaning by liquid jets. This makes it necessary to subsequently dry the cleaned belt, which is understandably not only time-consuming, but also increased structural and technical requirements for the cleaning devices and cleaning process.

[09] In order to prevent this disadvantage, methods exist in the prior art in which the band to be cleaned is brushed and a wet cleaning of the band is dispensed with. Here, however, only a moderate cleaning result is achieved, which does not meet the required production standards, especially those in the paper industry.

[10] It is an object of the present invention to further develop known cleaning devices with which in particular disadvantages of wet cleaning are avoided and nevertheless high cleaning requirements are achieved and met. The object of the invention is achieved by a device for cleaning a circulating material web, such as a dryer fabric, with cleaning agents which are arranged around a rotational axis adjacent to the rotating material web, and which is characterized in that the rotating cleaning agent in a Vacuum chamber are arranged.

[12] Due to the fact that the rotating cleaning agents are placed in a vacuum chamber, contaminants dissolved by the material web and in particular also by the rotating cleaning agents are advantageously removed from the cleaning area. In this way it is also prevented that about brushes of the rotating cleaning agent become clogged with impurities and as a result the cleaning performance of the present cleaning device is greatly reduced.

Thus, it is ensured that the cleaning agents over a very long period clean the rotating material web reliable. In particular, a "smearing" of the dissolved and not yet solved by the rotating material web contamination on the material web is prevented.

[14] It should be noted at this point that, if reference is made here to the material web, it is a cleaning region of the material web which lies opposite the cleaning agent and faces it.

The object of the invention is also achieved by a method for cleaning a rotating material web, such as a dryer, in which impurities by means of rotating and applied to the material web cleaning agent, such as cleaning brushes, are released from the rotating material web, the impurities accelerated by means of centrifugal forces and by means of a vacuum generated at least in the vicinity of the cleaning agent and transported away from the circulating material web.

[16] Advantageously, the impurities are accelerated away from the web of material from a combination of centrifugal forces acting on them and acceleration forces exerted on the contaminants by a vacuum and a flow of air.

[17] Cumulatively, it is advantageous if air is accelerated by the generated vacuum through the web. In particular, when air is accelerated through the material web, easily adhering impurities are entrained on the material web, for example by means of an air flow generated by the vacuum. In addition, the material web is additionally dried by the air flowing through. [18] Thus, it is procedurally advantageous if the impurities are accelerated by means of the air flowing through the circulating material web and in this case are transported away from the circulating material web.

[19] It is advantageous if the air flowing through the material web is further accelerated by means of the generated vacuum.

[20] It has been found that it is advantageous if the centrifugal forces acting on the impurities are generated by means of the rotating cleaning agents, since relatively large centrifugal forces can be generated by means of the rotating cleaning agents.

In particular, the adhering to cleaning agents impurities are particularly effectively solved when the dissolved from the web and adhering to the rotating cleaning agents impurities are thrown by the centrifugal forces of the rotating cleaning agents.

[22] It is also advantageous if impurities adhering to the material web by means of the generated vacuum, impurities dissolved by the material web, impurities dissolved on the rotating cleaning agents and / or impurities dissolved by the rotating cleaning agents are sucked out of a cleaning region.

[23] The present cleaning device is particularly small when the vacuum is generated directly inside a cleaning head in which the cleaning agents rotate.

[24] For this purpose, it is advantageous if means for generating the vacuum are arranged in the vacuum chamber and / or in a wall delimiting the vacuum chamber.

[25] A variant embodiment provides that the means for generating the vacuum have air jet nozzles which inject air into the vacuum chamber.

[26] A further variant of the method provides that by means of the vacuum a main air volume flow, which flows from a main inlet opening to a main outlet opening, is generated within the cleaning head or at least amplified within the cleaning head.

If the vacuum is generated within a cleaning head by means of compressed air jets, which are blown into the cleaning head, a volume flow or the main volume flow is further accelerated particularly advantageous. [28] It is advantageous if the compressed air jets emerge from nozzles whose outlet openings are directed away from the material web surface. As a result, the main volume flow is specifically accelerated away from the web.

[29] A multi-stage acceleration of the main volume flow is achieved when the compressed air jets emerge from nozzles arranged one behind the other in the main flow direction of the main volume flow.

[3O] In order to dry even heavily soaked webs quickly, it is advantageous if - in particular compressed air - is heated to produce compressed air jets.

[3 I] It is understood that the compressed air may have different temperatures. It has proven to be advantageous if, in particular, the compressed air to more than 50 ⁰ C, preferably to 60 ⁰ C or more, warmed up.

[32] Especially for the drying of soaked material webs, it is advantageous if also the other process air, as described for the example of the compressed air, is preheated.

[33] Due to the additionally warmed-up process air, generally faster drying of normal or only slightly soaked material webs is achieved than with process air which has not been additionally warmed up.

[34] In the present case, there are particular advantages with regard to the preheated process air when cleaning a wet material web. Thus, the features associated with the preheated process air, in particular the preheated compressed air, in the present case even without the other features advantageous for generic cleaning devices and cleaning methods.

[35] An advantageous device variant provides that the cleaning means comprise rotating brushing means which brush the circumferential material web. Such rotating brushing clean the rotating material web during their rolling on the material web particularly well. By means of the brushing agent, even the most stubborn soiling is released from the material web, the aforementioned "smearing" being prevented.

The combination of the rotation of the brushing means and the existing vacuum prevents the brushing means from being "clogged" with contaminants dissolved by the circulating material web, thereby greatly reducing the cleaning performance within a very short time solved by a dry mechanical cleaning device. [37] Thus, it is advantageous if contaminants are solved by means of rolling on the revolving material web cleaning agents.

[38] Advantageously, in this case the brushing means are driven by the circulating material web.

[39] In terms of apparatus, it is therefore advantageous if the rotating brushing means can be driven by means of the circulating material web. Thus, it is possible to dispense with an additional drive device for the refresh means.

[40] Advantageously, the rotating brush means are mounted within the vacuum chamber on a rotation axis which is arranged substantially transversely to the circulating material web. As a result, the mounting of the rotating brushing means within a vacuum chamber is structurally simple, wherein the rotating brushing means can be easily driven by means of the circulating material web on the axis of rotation extending essentially transversely to the material web.

[41] Due to the rotating brushing agent as cleaning agent, the material web is advantageously not wetted by a liquid or not wetted by a liquid. In particular, due to the liquid-free cleaning device operating unwanted moisture strips, which adversely affect the quality of the web, avoided.

[42] At this point it should be noted that the proposed cleaning device and the proposed cleaning method are particularly well suited for use in wet ends, press sections and / or dryer sections in papermaking.

[43] A good cleaning result is already achieved if the bristles of the brushing agent coat the material web and brush the surface of the material web. A further variant of the method provides that at least individual bristles of the brushing means at least partially penetrate into pores and / or permeabilities of the circulating material web. As a result, deep-seated contaminants are dissolved out of the circulating material web even in the material web, without having to jet a liquid jet onto the circulating material web, which has the property of penetrating deep into intermediate spaces, such as pores and / or permeabilities, of the material web.

[44] In this context, it is advantageous if at least individual bristles of the brushing means at least partially penetrate into material-free regions, such as pores or permeabilities of the material web, of the circulating material web. [45] In the context of the present application, the term "material-free areas" describes permeabilities in a circulating material web.These permeabilities make it possible for liquids and gases to penetrate the material web, but also easily penetrate into these material-free areas In a simple case, the material-free regions are, for example, simple holes in a screen web, for example in the case of a fabric web, these are the interspaces between individual fabric threads or the like.

[46] In order to achieve a rapid cleaning of the circulating material web with the present cleaning agents, it is advantageous if the rotating brushing means have a cleaning width of more than 2 cm, preferably of about 7 cm.

[47] So that the rotating brushing means can be pressed with structurally small-sized components with a sufficiently large force to the rotating material web, it is advantageous if the rotating brushing means have a cleaning width of less than 15 cm.

The rotating brush means can roll particularly well and with a sufficiently trained width on the rotating material web, when the rotating brushing means are formed like a roller.

It has been shown that the rotating brushing means have advantageous contact with the circulating material web and in this case particularly good cleaning results are achieved when the rotating brushing means have radially protruding bristles.

[50] If the cleaning device has a pressing device by means of which the pressing force of the rotating cleaning agent can be selected on the circulating material web, the intensity with which the cleaning agent comes into contact with the circulating material web, can be set advantageously. Thus, the present pressing device is a vertical adjustment device for the present cleaning agents.

[5I] It is understood that the contact force between the cleaning agents and the circulating material web can be realized constructively in various ways in a variety of ways. A structurally particularly simple adjustment is obtained when the pressing device for adjusting the contact pressure adjusting means with a relation to the rotating cleaning agents displaceable mass, in particular a displaceable counterweight has. Weight adjustments for the purpose of Anpresskraftregulierung with such a counterweight can be easily understood even by untrained personnel. In addition, the maintenance effort is very low and maintenance is easy to carry out. to lead. In addition, such simply constructed adjustment with such a displaceable mass work very reliable even under the most adverse conditions.

[52] A related embodiment provides that the displaceable mass for adjusting the contact pressure is radially displaceable relative to a pivot axis of the rotating cleaning agent. Thus, the displaceable mass and the rotating cleaning agent form two components which oscillate about the pivot axis.

[53] Accordingly, it is advantageous if the displaceable mass forms a counterweight to the rotating cleaning agents.

[54] A particularly uncomplicated design is when the displaceable mass and the rotating cleaning agents form a balance with a common point of articulation.

The strength of the contact force results depending on which lever arm between the displaceable mass and the pivot axis is set.

[56] Alone by means of the displaceable mass, the contact pressure is structurally particularly simple manner adjustable. Alternatively or cumulatively to the displaceable mass, however, it is also advantageous if the pressing device has hydraulic, pneumatic and / or spring-actuable adjusting means for adjusting the contact pressure.

[57] Furthermore, it is advantageous if the pressing device is a vertical adjusting device, by means of which the brushing means are displaceable in a vertical direction with respect to the material web.

[58] Since the adjustment of the contact force by means of the displaceable mass described above is advantageous with regard to any material web cleaning devices, the features associated with the abutment device described above are also advantageous without the other features of the invention.

So that not only the contact force between the cleaning means and the circulating material web is variable, but the cleaning means are also versatile in relation to the circulating material web, it is advantageous if the rotating brush means at least three spatial axes, in particular about a rotation axis, are mounted to at least one horizontal pivot axis and about a vertical axis of rotation, rotatable or pivotable.

[60] In this context, it is advantageous with regard to a variant of the method if the brushing means rotate on a rotational axis which is displaceable with respect to the circulating material web. hereby the brushing means can be adjusted individually relative to the material web depending on the required cleaning parameters.

[6I] It is additionally advantageous if the brushing means, in particular an axis of rotation of the brushing means, are set at an angle to the circulating material web.

[62] A further variant of the method provides for the brushing means to be set radially relative to the circulating material web. With the radial adjustment of the brushing means, as explained above, for example, the contact pressure between the brushing means and the circulating material web can be set almost arbitrarily. But even with progressive brush wear, the brushing means can be adjusted accordingly to ensure sufficient contact with the material web.

[63] The term "radial" in the context of the present invention describes a direction of movement of the brushing means, which is directed substantially vertically on the material web to or from the material web away.

[64] In order to be able to move the cleaning means relative to the circulating material web in a plane extending substantially vertically to the material web, it is advantageous if the cleaning means have a further vertical adjustment device by means of which the rotating brushing means, in particular the axis of rotation of the rotating brushing means, are vertical is mounted displaceable relative to the material web.

[65] In this context, it is advantageous if, by means of the further adjusting device, the rotating brushing means, in particular the axis of rotation of the rotating brushing means, are adjustable obliquely to the material web in a vertical plane extending substantially perpendicular to the material web. By means of such an adjusting device, the rotating brushing means can be pressed, for example, with one end more intensively against the rotating material web, so that in this area the material web comes into contact particularly intensively with the rotating brushing means.

[66] For the purposes of the patent application, the term "substantially perpendicular" is understood to mean any orientation of the vertical plane that deviates from a plane that is parallel to the web of material, but preferably the vertical plane is not inclined to the web of material.

[67] A special flexible adjustment is ensured if by means of the further vertical adjusting device, the rotating brushing means, in particular the axis of rotation of the rotating brushing means, can be adjusted in a vertical angle of up to 45 ° to the circulating material web. [68] The term "vertical angle" is understood in connection with the present patent application, in particular an angle which is spanned in the substantially vertical vertical plane, ie between the surface of the rotating material web and the rotating brush means, in particular the axis of rotation of the rotating brush , extends.

[69] A further embodiment variant provides that the cleaning device has a horizontal adjustment device, by means of which the rotating brushing means, in particular the axis of rotation of the rotating brushing means, are rotatably mounted about a vertical axis of rotation.

[70] For the purposes of the present patent application, the term "vertical axis of rotation" is understood to mean a rotational axis of the cleaning device which is arranged essentially vertically in relation to the circulating material web.

[7I] It is thus possible to adjust the cleaning device, in particular components or component groups, such as the rotating brushing means, to the direction of movement of the circulating material web such that the axis of rotation of the brushing means has an angle to the direction of movement of the circulating material web, which is located in a Essentially horizontally extending plane is different from a right angle.

[72] In order to increase the cleaning effect, it is advantageous if, by means of the horizontal adjustment device, the rotating brushing means, in particular the axis of rotation of the rotating brushing means, are displaceable out of a vertical plane running essentially transversely to the circulating material web.

[73] It has been found, in particular, that the cleaning device provides a particularly high cleaning performance when the rotating brushing means are set at an angle of rotation of approximately 10 ° about the vertical axis of rotation with respect to the circumferential direction of the circulating material web.

[74] For example, to shield the rotating brushing means from the environment, it is advantageous if the cleaning device has a cleaning head in which the vacuum chamber is arranged and the cleaning head is a vacuum-generating device.

[75] Furthermore, it is advantageous if the cleaning device has a cleaning head on which or in which the rotating brushing means, in particular the axis of rotation of the rotating brushing means, are arranged. It has been found that it is advantageous if the rotating brushing means, in particular the axis of rotation of the rotating brushing means, are rotatably mounted on the cleaning head or within the cleaning head. [76] In order to remove contaminants dissolved by the rotating brushing means directly from the circulating material web, it is advantageous if the rotating brushing means between a negative pressure region of the cleaning device and the circulating material web or in front of a negative pressure region of the cleaning device, preferably within a negative pressure region of the cleaning device, are arranged.

[77] By means of such an arrangement it is ensured that dissolved contaminants are sucked off and removed directly from the circulating material web. Thus, the risk is reduced that such contamination uncontrolled get into the environment and there cause contamination on other components.

[78] The cleaning device is particularly compact when the cleaning head is a negative pressure generating device of the cleaning device.

As a result, it is achieved that it is possible to dispense with an additional vacuum generating device on the cleaning device. This is presently advantageously achieved by the fact that the cleaning head itself is a negative pressure generating device of the cleaning device. It is thus achieved that it is possible to dispense with an additional negative pressure generating device on the cleaning device for the actual cleaning head.

[80] Such a negative pressure generating means in the form of a cleaning head is particularly easy to manufacture and provide when the cleaning head is formed from more than one main body.

[8I] In order to securely fasten the rotating brushing means to the cleaning device, it is advantageous if the cleaning head has a receiving main body for the rotating brushing means.

[82] In order for the cleaning head to be designed to save space while still sufficiently covering the circulating material web, it is advantageous if the receiving main body is conical.

[83] In order to be able to provide favorable negative pressure conditions within the cleaning head, it is advantageous if the receiving main body has a conically shaped inner wall.

[84] Preferably, the inner wall encloses at least partially a brush receiving space of the cleaning head. [85] In order to be able to rotate the cleaning head, in particular the rotating brushing means, about the vertical axis of rotation and in the horizontal plane, it is advantageous if the horizontal adjusting device is arranged on the receiving main body.

[86] It is advantageous if the cleaning head has a holding main body, by means of which the cleaning head is arranged on an adjusting device, in particular on a vertical adjusting device for the rotating brushing means.

[87] In order for the horizontal adjustment device to work independently of the vertical adjustment device or vice versa, it is advantageous if the receiving main body is rotatably mounted at least in relation to the holding main body.

[88] In order to immediately remove dirt that has been sucked into the cleaning head from the cleaning head, it is advantageous if the cleaning head has a connection body, by means of which the cleaning head is arranged on a removal device.

[89] In order to make the cleaning head as flexible as possible, it is advantageous if the terminal main body is rotatably supported on the holding main body.

[90] The cleaning head is particularly flexibly associated with the discharge device when the cleaning head is arranged loosely on the dirt removal device.

In this context, it is advantageous if the cleaning head is arranged articulated on a dirt removal device.

[92] The cleaning head is structurally particularly simply designed as a vacuum generating device if the cleaning head, in particular the receiving main body of the cleaning head, has more than one accelerating jet nozzle ring. By way of example, air jets can be directed into the cleaning head by means of the acceleration jet nozzle ring, so that a vacuum is created within the cleaning head or the brush receiving space by means of these air jets.

[93] It is advantageous if each acceleration jet nozzle ring has a multiplicity of acceleration jet nozzles directed into the cleaning head.

Moreover, it is advantageous if the accelerating jet nozzle rings are arranged concentrically in the cleaning head. As a result, a particularly uniform irradiation of the acceleration jets is ensured in the Bürstenaufhahmeraum. [95] In order to further increase the negative pressure within the cleaning head, it is advantageous if the cleaning head has a gradually tapered Bürstenaufhahmeraum.

[96] In order for the air in the brush holding space to be accelerated particularly well away from the material web, it is advantageous if the brush seam space tapers away from the circulating material web.

It is understood that the present invention can also be used in combination with a wet cleaning. However, so that a particularly advantageous dry cleaning can take place, it is advantageous if the cleaning device has a liquid nozzle-free cleaning device, in particular a liquid nozzle-free cleaning head. In particular, this also makes the cleaning head much simpler, since no further channels for a liquid supply and related recordings for liquid nozzles are required.

Furthermore, it goes without saying that, in addition to the acceleration jets directed away from the circulating material web, further air jets, for example for forming an air curtain between the cleaning head and the circulating material web, can be directed onto the circulating material web. So that the circulating material web is already dried particularly well during the cleaning of these air jets directed onto the material web, it is advantageous if the cleaning device has a heating device or a heat exchanger for heating process air.

It has been found that excellent drying performance has already been achieved if the process air can be heated to above 50 ° C., preferably to approximately 60 ° C., by means of the heating device or the heat exchanger. In particular, this also applies to cleaning devices which cumulatively or alternatively clean a material web with liquid jets. It is understood that depending on the application, higher temperatures than 60 ⁰ C can be set.

[100] Since the features associated with the heater and / or the heat exchanger without the other features of the invention are advantageous, all features in connection with the heater or the heat exchanger without the other features of the invention are essential to the invention.

[101] Further advantages, objects and characteristics of the present invention will be described with reference to the following attached drawing, in which an example of a cleaning head with a rotating brush of a cleaning machine is shown.

[102] It shows FIG. 1 schematically shows a cross section through a cleaning head aligned in a neutral working position, in which a brush rotating about an axis of rotation is arranged,

FIG. 2 additionally shows the cleaning head from FIG. 1 in a hinged working position (dashed representation),

FIG. 3 schematically shows a side view of a cleaning head with a vacuum chamber and with a counterweight for adjusting the contact force of a brush for cleaning a material web,

FIG. 4 is a schematic front view of the cleaning head of FIG. 3;

FIG. 5 shows a schematic side view of a cleaning device with a cleaning head with a counterweight arranged above a material web,

FIG. 6 is a schematic side view of a cleaning device with a counterweight cleaning head arranged below a material web;

FIG. 7 schematically shows a view of a cleaning head in a working position before passing through a brush control device,

8 is a schematic view of the cleaning head of FIG. 7 passing through a brush control device, FIG.

FIG. 9 schematically shows a view of the cleaning head from FIGS. 7 and 8 after passing through a brush control device,

FIG. 10 schematically shows a view of the cleaning head from FIGS. 7 to 9 in the parking position before re-passing a brush control device,

FIG. 11 schematically shows a view of the cleaning head from FIGS. 7 to 10 in a working position after the re-passage of a brush control device,

FIG. 12 schematically shows a view of the cleaning head from FIGS. 7 to 11 in combination with a brush control device,

FIG. 13 schematically shows a view of the cleaning head from FIGS. 7 to 12 during the contactless passing of a brush control device from a working position into a parking position, FIG. 14 schematically shows a view of the cleaning head from FIGS. 7 to 13 in combination with a triggered brush control device.

The cleaning head 1 shown in FIGS. 1 and 2 is mounted in a frame 2 of a cleaning device (not explicitly shown here) for a circulating material web 3.

In this exemplary embodiment, the cleaning head 1 consists of a two-part main body 4 divided into two parts, wherein a first receiving part body 5 forms a cylindrical brush-receiving chamber 6. A second Aufhahmeteilkörper 7 of the second divided Aufhahmehauptkörpers 4 together with the first Aumahmeteilkörper 5 a first acceleration jet nozzle ring 8, which is provided on one of the material web 3 facing the end 9 of the two-part Aumahmehauptkörpers 4.

[105] The second Aufhahmeteilkörper 7 is hereby pushed onto the first Aufhahmeteilkörper 5, so that between the two receiving part bodies 5 and 7 of the accelerating jet nozzle ring 8 is formed. Thus, the second Aumahmeteilkörper 7 is fixed to the first Aumahmeteilkörper 5, both Aumahmeteilkörper 5, 7 are secured to each other by means of first screw 10.

[106] The two-part receiving main body 4 of the cleaning head 1 is rotatably supported in a holding main body 11 of the cleaning head 1.

As a result, the second-divided receiving main body 4 can be rotated within the holding main body 11 about a vertical rotational axis 12 which is arranged substantially vertically relative to the circumferential material web 3.

[108] In order to rotatably fix the two-divided receiving main body 4 in the holding main body 11, the conical first receiving part body 5 is clamped to a terminal main body 13 opposite to the holding main body 11. In order to firmly connect the terminal main body 13 and the first accommodating body 5 of the two-part main body 4, the first accommodating body 5 is secured to the terminal main body 13 by means of further screw connections 14.

Moreover, the terminal main body 13 and the first receiving part body 5 constitute a further accelerating jet nozzle ring 15 provided at an end of the two-part receiving main body 4 facing away from the circulating material web 3.

[110] The terminal main body 13 of the cleaning head 1 communicates with a connection device 16 of a discharge pipe 17 of a discharge device (not explicitly shown here). [1 1 1] For cleaning the circulating material web 3, a brush 19 is arranged within the cleaning head 1, in particular in the Bürstenaumahmeraum 6 of the two-part Aufhahmehauptkörpers 4. The brush 19 rotates about a brush rotation axis 20, which is mounted on the two-part receiving main body 4. The brush 19 consists essentially of a first bristle ring 21, a second bristle ring 22 and a third bristle ring 23, which are attached side by side on a brush rotating body 24.

[112] Each of the three bristle rings 21, 22 and 23 has a plurality of individual bristles 25 (numbered here only by way of example), which are arranged concentrically around the brush rotation axis 20.

[1 13] The entire cleaning head 1 is positioned opposite to the circulating material web 3 in such a way that the individual bristles 25 penetrate into the material-free interstices (not shown here) of the circulating material web 3 and in this way liberate the material-free interstices of the circulating material web 3 particularly well from contamination. which adhere to the circumferential material web 3.

[114] The individual bristles 25 can thus also penetrate into the intermediate spaces of the circumferential material web 3, as a result of which they are cleaned particularly well of soiling.

[1 15] The brush rotation axis 20 extends substantially with its longitudinal extent transversely to the circumferential material web 3, in particular transversely to a direction of movement 26 of the rotating material web 3. The movement direction 26 of the rotating material web 3 is according to the illustration of Figures 1 and 2 in the paper plane directed into it.

[1 16] The brush rotation axis 20, which is oriented essentially transversely to the circulating material web 3, and the contact of the bristles 25 with the surrounding material web 3 ensures that the brush 19 is set in rotation by the movement of the circulating material web 3. Thus, the brush 19 is driven solely by the movement of the rotating material web 3, so that an additional drive means for the brush 19 is not required.

[117] This is one reason why the cleaning head 1 is realized structurally particularly space-saving.

[118] Due to the direction of movement 26, the brush 19 rotates about the brush rotation axis 20 with a direction of rotation 27.

[119] The brush 19 is formed with its three bristle rings 21, 22 and 23 in the manner of a brush roller, so that the brush 19 forms a very wide direct cleaning area 28 on the material web 3. It is understood that the direct cleaning region 28 can be made wider by broader bristle rings 21, 22 and 23 or by additional bristle rings.

[121] In order to be able to set the brush 19 about the vertical axis of rotation 12 with respect to the surrounding material web 3 with a horizontal angle (not shown here), a horizontal adjustment device 30 engages at one end of the brush rotation axis 29. By means of the Horizontalverstelleinrichtung 30 in particular the two-part Aufhahmehauptkörper 4 relative to the holding main body 1 1 is rotatable.

[122] If the brush 19 is rotated by means of the horizontal adjustment device 30 in a horizontal plane 31, the mechanical frictional contact between the individual bristles 25 of the brush 19 and the circulating material web 3 is substantially intensified.

The horizontal plane 31 extends at least in the contact region of the brush 19 and the circumferential material web 3 substantially parallel to the circulating material web 3 when the cleaning head 1 is in a neutral working position. According to Figures 1 and 2, the horizontal plane 31 extends perpendicular to the paper plane.

[124] The horizontal angle of attack about the vertical axis of rotation 12 is set in the present case as a function of the type and degree of contamination of the circulating material web 3. It has been found that a horizontal angle of about 10 ° causes optimum cleaning of the rotating material web 3, wherein the wear of the material web 3 and the bristles 25 is relatively low in a tolerable degree.

[125] According to the representation of FIG. 1, the brush 19 is oriented in such a way that it is arranged at a right angle to the direction of movement 26 of the circulating material web 3. This means that the brush rotation axis 20 of the brush 19 to the rotating material web 3 has an angle of 0 °.

[126] In order to be able to deflect the brush 19 in a vertical plane 32 in relation to the circulating material web 3, a vertical adjustment device 33 acts on the holding main body 11. By means of the vertical adjustment 33 and the contact force between the brush 19 and the rotating material web 3 can be adjusted.

[127] The vertical plane 32 lies in the plane of the paper as shown in FIG. [128] The vertical adjuster 33 is pivotally attached to the holding main body 11 about a holding main body pivot 34. For rotation of the entire cleaning head 1 within the vertical plane 32 of the holding main body 11 is mounted by means of a lever arm 35 to a pivot axis 36.

[129] As shown in FIG. 1, the vertical adjustment device 33, which is designed as a hydraulic cylinder in this exemplary embodiment, is set in a neutral position. The hydraulic cylinder of the vertical adjustment device 33 can either be extended or retracted relative to this neutral position, depending on in which vertical adjustment the brush 19 is to be adjusted relative to the circulating material web 3.

According to the representation of FIG. 2, the hydraulic cylinder of the vertical adjustment device 33 is retracted, so that the brush 19 and thus the entire cleaning head 1 in the vertical plane 32 are set about the pivot axis 36 by a first horizontal setting angle 37 with respect to the circulating material web 3.

[131] While the full-line representations of FIGS. 1 and 2 show the cleaning head 1 in a neutral working position with respect to the circulating material web 3, the cleaning head 1 is deflected in the dashed representation according to FIG. 2 in a working position 39 employed at least in the vertical plane 32.

[132] In the deflected working position 39, in particular the bristles 25 of the first bristle ring 21 are more in contact with the circulating material web 3 than the remaining bristles 25 of the second cost ring 22 and the third bristle ring 23. As a result, areas of the circulating areas are particularly heavily soiled Web 3 reinforced by bristles 25 of the first bristle ring 21 traction, without causing the entire bristles 25 of the brush 19 are in strong contact with the rotating material web 3.

[133] In order to remove dissolved dirt immediately from the circulating material web 3 and the brush 19, a vacuum is set in the brush receiving space 6, whereby the brush receiving space 6 becomes a vacuum chamber of the cleaning device. In this way it is avoided that dissolved contaminants inadvertently enter the environment 40 of the cleaning head 1 and there ensure contamination of the remaining components of the cleaning device.

[134] In this embodiment, the vacuum within the brush holding space 6 is generated by means of air jets consisting of a series of accelerating jet nozzles 41 (shown and numbered only by way of example) of the first accelerating jet nozzle ring 8 and accelerating jet nozzles 42 (shown and numbered here only by way of example) of the second accelerating jet nozzle ring 15 escape. From the acceleration jet nozzles 41, 42 of the two acceleration jet nozzle rings 8 and 15, first acceleration beams 43 and second acceleration beams 44 emerge, the acceleration beams 43, 44 being directed away from the circulating material web 3 into the brush receiving space 6 or into an extended brush receiving chamber 45 , Since the accelerating agent nozzles 41 and 42 of the two accelerating jet nozzle rings 8 and 15 are disposed within the brush receiving space 6 and a vacuum is generated therewith, the accelerating agent nozzles constitute means for generating a vacuum within the vacuum chamber.

In the present case, the acceleration beams 43, 44 are characterized in that they emerge from the accelerating jet nozzles 41 and 42 away from the circulating material web 3. Thus, in contrast to the first air jets 46 and other air jets 47 directed towards the circulating material web 3, the acceleration jets 43, 44 are not suitable for working or cleaning the circulating material web 3. Rather, the acceleration jets 43, 44 generate a negative pressure within the brush holding space 6 and the extended Bürstenaumahmeraums 45, so that detached from the rotating material web 3 contaminants are sucked from the circulating material web 3.

Thus, the first acceleration beams 43 and the second acceleration beams 44 do not serve for cleaning the circulating material web 3, since they only remove contaminants that have already been dissolved by their caused negative pressure within the brush seam space 6 from the circulating material web 3.

[137] In addition to the first acceleration beams 43 and the second acceleration beams 44, the air inside the brush room 6 or within the extended brush holder space 45 is additionally accelerated by immediately following a cross-sectional widening in the two spaces 6 and 45 behind cross-sectional constrictions. In the present case, a first cross-sectional widening of the brush seam space 6 in the region of the acceleration jet nozzles 41 is followed by a first cross-sectional widening. A second cross-sectional widening follows in the transition area of the brush chamber space 6 to the extended brush mounting space 45 in the region of the acceleration jet nozzles 42 of the further accelerating jet nozzle ring 15.

The above-explained air jets 46 and 47 are produced by means of warmed and preheated compressed air, which is heated to 60 ⁰ C by means of an additional heater (not shown here) in this embodiment. This has the advantage that moisture is better dissipated from and from the circulating material web 3. [139] The cleaning head 101 shown in FIGS. 3 and 4 is pivotably mounted about a pivot axis 136 in accordance with a pivoting movement 148 on a frame 102 of a cleaning device not shown here.

[140] The cleaning head 101 includes a rotary brush 119 which is rotatably mounted in a brush accommodating space 106 on a brush rotation axis 120. The brush rotation axis 120 is at the

Cleaning head 101 according to the double arrow 120A held displaceable. In the cleaning head 101 and in walls 106 A of the Bürstenaufhahmeraums 106 acceleration nozzles (see Figures 1 and 2) are provided, by means of which compressed air is injected into the Bürstenaufhahmeraum 106. This results in a vacuum within the Bürstenaufhahmeraums 106, whereby the Bürstenaufhahmeraum 106, in particular during operation of the cleaning head 106, to a vacuum chamber 149, in which the

Brush 1 19 is arranged to rotate.

[141] According to the invention, contamination adhered to the brush 119 is released from bristles 125 of the brush 1 19 due to centrifugal forces initiated by the brush rotation, and by the suction of the vacuum initiated in the vacuum chamber 149, and immediately removed from the brush Cleaning head 101, in particular from the Bürstenaufhahmeraum 106, conveyed out.

[142] The volumetric flow 150 generated by means of the accelerating nozzles, which moves due to the movement of air formed in the vacuum chamber 149 from an input side 151 to an output side 152 through the Bürstenaufhahmeraum 106 of the cleaning head 101, with all dissolved therein or floating particles on a Abfuhrrohr 1 17 a discharge device (not shown here) dissipated.

[143] In order to be able to set pressing forces 153 with which the brush 119 traverses a material web 103 to be cleaned, the cleaning head 101 comprises a corresponding pressing device 154 which has a holder 155 and a counterweight 156 with a mass 157 displaceable relative to the pivot axis 136 having. The displaceable mass 157 is displaceable along a sliding axis 158 according to the sliding directions 159. The displaceable mass 157 can be positioned and fixed very precisely on the sliding axis 158 by means of a position nut 160 and a lock nut 161.

[144] In the cleaning device 262 shown in FIG. 5, a cleaning head 201 with a pressing device 254 is shown, in which the adaptation device 254 has a displaceable mass 257 on a corresponding sliding axis 258. The displaceable mass 257 is displaceable relative to a pivot axis 236 of the cleaning head 201, so that the displaceable mass 257 is a counterweight which can be adjusted relative to the cleaning head 201. By means of the set distance between the displaceable mass 257 and the pivot axis 236 are the contact forces 253 adjustable, which act between the rotating material web 202 and a rotating brush 219 of the cleaning device 262.

[145] In this exemplary embodiment, the cleaning head 201 is placed above the circulating material web 203, in particular above a deflection roller 263, over which the circulating material web 203 is guided.

[146] In the present case, the cleaning head 201 is fastened to a cleaning head holder 264, which is a component of a frame 202 of the cleaning device 262.

The cleaning head 201 is connected at its output side 252 by means of a discharge pipe 217 to a disposal device 265. Within the disposal device 265, a volume flow divider 266 is arranged. By means of the volumetric flow divider 266, the volumetric flow 250 is divided into two partial volume flows (not explicitly shown here), resulting in particularly favorable flow and pressure conditions within the disposal device 265, which promote the discharge of the volumetric flow 250 from the cleaning head 201. As a result, the risk is substantially reduced that adjust unfavorable pressure conditions within the cleaning head 201 and it comes there to congestion and worst case deposits of particles of the volume flow 250. Advantageously, the volume flow 250 is additionally accelerated by means of the volume flow divider 266, so that it is possible to completely dispense with an exhaust fan, as has hitherto been required in the case of generic cleaning devices.

[148] So that the cleaning head 201 can be moved over the entire width of the circulating material web 203 and even traversing, it is mounted with the cleaning head holder 264 on a traverse carriage 267.

In the case of the cleaning device 362 shown in FIG. 6, in particular a cleaning head 301 of the cleaning device 362 is arranged underneath a circulating material web 303. The circulating material web 303 is deflected at a deflection roller 363 and moves past the cleaning head 301 in the transport direction 368.

[150] The cleaning head 301 is attached to a cleaning carriage frame 302 by means of a cleaning head holder 364 on a traversing carriage 367.

The cleaning head 301 also includes a pressing device 354 with a displaceable mass 357, by means of which the cleaning head 301 are articulated about a pivot axis 336 in such a way can, that here contact forces 353 between a brush 319 and the rotating material web 303 are individually adjustable.

[152] By means of a discharge pipe 317, the cleaning head 301 is connected to a disposal device 365. Within the disposal device 365, a volumetric flow divider 366 already described with regard to FIG. 5 is arranged.

[153] In contrast to the exemplary embodiment shown in FIG. 5, in the exemplary embodiment according to FIG. 6, the cleaning head 301 is placed below the circulating material web 303.

The interaction between a signal transmitter 470 of a brush control device 471 (see FIGS. 12 and 14) and the cleaning head 401 is illustrated on the basis of a further cleaning head 401 shown in FIGS. The cleaning head 401 includes a brush accommodating space 406 in which a brush 419 is disposed, which can rotate on a brush rotation axis 420 within the brush accommodating space 406.

The brush holding space 406 not only serves to receive the brush 419 within the cleaning head 401, but also serves to provide a vacuum chamber 449 such that the brush 419 is within a vacuum when the cleaning head 401 is operating properly.

To generate the vacuum in the vacuum chamber 449, acceleration nozzles (not explicitly shown here, see FIGS. 1 and 2) are provided in the walls 406 A of the brush mounting space 406, which inject compressed air into the brush receiving space 406, so that a volume generated in this case a current 450 within the Bürstenaufhahmeraums 406 established a vacuum and thus the brush receiving space 406 in the operation of the cleaning head 401, a vacuum chamber 449 provides.

[157] The signal generator 470 has a pendulum 472, which can oscillate about a pendulum axis 473 of the signal generator 470. The signal generator 470 also has a sensor 474, which can register a pendulum movement of the pendulum 472. The signal generator 470 is further connected to a controller 475, which processes a signal generated by the sensor 474 and displays it on a display device 476.

[158] By means of the brush control device 471, in particular by means of the signal generator 470, the wear of the brush 419 is checked. For this purpose, the cleaning head 401 is preferably moved laterally of a circulating material web 403. Accordingly, the signal generator 470 is preferably arranged next to the circulating material web 403. [159] The bristles 425 of the brush 419 are still in a usable state according to the illustrations of FIGS. 7 to 13. This is determined as follows. In the illustration according to FIG. 7, the cleaning head 401 is still in a working position 477 above the circulating material web 403.

[160] To test the length of the bristle, the cleaning head 401 is moved in accordance with a forward movement 400 via the signal generator 470 (see FIG. 8). Due to a sufficient bristle length, the pendulum 472 of the signal generator 470 is moved out of its vertical starting position 478 by the bristles 425, since the bristles 425 come into contact with the pendulum tip 472A.

[161] As shown in FIG. 9, the cleaning head 401 is already in a parking position 479 (see FIG. 9).

When the cleaning head 401 leaves the parking position 479 again in accordance with a return movement 400A, it passes over the signal generator 470 again (see FIG. 10) and, with sufficient bristle length, moves the pendulum 472 out of its vertical starting position 478. Subsequently, the cleaning head 401 is again in a working position 477 (see FIGS. 7 and 11) and can further clean the circulating material web 403.

[163] To indicate the status of the brush 419, the signal transmitter 470 includes a sensor 474 which sends a corresponding signal in association with the current cleaning head position to a controller 475, an alarm being triggered when the bristle length deflects the transducer pendulum 472 no longer guaranteed (see Figures 13 and 14).

[164] According to the illustrations of FIGS. 13 and 14, the length of the bristles 425 falls below a critical value, so that when the signal generator 470 is passed over, the bristle length is no longer sufficient to make contact with the pendulum tip 472A. This has the consequence that the pendulum 473 is no longer deflected. From the current cleaning head position and the signal of the sensor 474, the controller recognizes the respective bristle situation, which is displayed with the display device 476. In particular, the components of the brush control device 471 described here, such as sensor 474, controller 475 and display device 476, are interconnected by means of suitable connecting means 480. List of reference numerals:

1 cleaning head

2 Rack of a cleaning device

3 circumferential material web

4 split intake main body

5 first receiving part body

6 brush storage room

7 second Aufhahmeteilkörper

8 first accelerating jet nozzle ring

9 the circumferential material web 3 facing the end of the two-part receiving main body

10 first screw connections

1 1 holding main body

12 vertical axis of rotation

13 terminal main body

14 more screw connections

15 second accelerating jet nozzle ring

16 connection device

17 discharge pipe of a discharge device

18, the connection device 16 facing the end of a discharge device

19 brush

20 brush rotation axis

21 first bristle ring

22 second bristle ring

23 third bristle ring

24 brush rotating body

25 bristles

26 direction of movement of the rotating material web 3

27 direction of rotation

28 cleaning width

29, one end of the brush rotation axis

30 Horizontal adjustment

31 horizontal plane

32 vertical plane

33 vertical adjustment device 34 holding main body rotation axis

35 lever arm

36 pivot axis

37 vertical angle of attack 38 neutral working position

39 articulated working position

40 environment

41 accelerating nozzles of the first accelerating jet nozzle ring 8

42 accelerating nozzles of the second accelerating jet nozzle ring 15 43 first accelerating jets

44 second acceleration beams

45 extended brush storage room

46 first air jets

47 more air jets 101 cleaning head

102 Frame of a cleaning device

103 circumferential material web 106 Bürstenaufhahmeraum

106A walls of the brush room 106 106 outlet pipe

1 19 brush

120 Brush rotation axis 120A Double arrow direction 125 Bristles 136 Linkage axis

148 pivoting movement

149 vacuum chamber

150 volume flow

151 Input side 152 Output side

153 contact forces

154 pressing device

155 bracket

156 counterweight 157 displaceable mass 158 sliding axle

159 sliding instructions

160 position nut

161 lock nut

201 cleaning head

202 frame

203 circumferential material web

217 discharge pipe

210 brush

236 pivot axis

250 volume flow

252 output side

253 contact forces

254 pressing device

257 displaceable mass

258 sliding axis

262 cleaning device

263 pulley

264 Cleaning head holder

265 Disposal facility

266 volume flow divider

267 traversing carriages

268 transport direction

301 cleaning head

302 cleaning device rack

303 circumferential material web

317 discharge pipe

318 brush

336 pivot axis

357 displaceable mass

363 pulley

365 disposal facility

366 Volume flow divider

367 traversing carriages

368 transport direction 400 forward movement

400A return movement

401 cleaning head

403 rotating material web

406 brush receiving space

406A walls of brush holder room 406

403 rotating material web

419 brush

420 brush rotation axis

425 bristles

449 vacuum chamber

450 volume flow

470 signal transmitter

471 brush control device

472 pendulum

472A pendulum tip

473 swing axle

474 sensor

475 controllers

476 display device

477 working position

478 vertical starting position

479 parking position

480 connecting means

Claims

claims:

1. An apparatus for cleaning a rotating material web, such as a dryer fabric, with cleaning means, which are arranged around a rotational axis adjacent to the rotating material web, characterized in that the rotating cleaning means are arranged in a vacuum chamber.

2. Cleaning device according to claim 1, characterized in that means for generating a vacuum are arranged in the vacuum chamber and / or in a wall bounding the vacuum chamber.

3. Cleaning device according to one of claims 1 or 2, characterized in that means for generating a vacuum air jet nozzles which inject air into the vacuum chamber.

4. Cleaning device according to one of claims 1 to 3, characterized in that the cleaning means comprise rotating brushing means (19) which brush the peripheral material web.

5. Cleaning device according to claim 4, characterized in that the rotating brushing means (19) are mounted within the vacuum chamber on a rotational axis (20) which is arranged substantially transversely to the circulating material web.

6. Cleaning device according to one of claims 4 or 5, characterized in that the rotating brushing means (19) by means of the revolving material web (3) are drivable.

7. Cleaning device according to one of claims 4 to 6, characterized in that the rotating brushing means (19) have a cleaning width (28) of more than 2 cm, preferably of about 7 cm.

8. Cleaning device according to one of claims 4 to 7, characterized in that the rotating brushing means (19) have a cleaning width (28) of less than 15 cm.

9. Cleaning device according to one of claims 4 to 8, characterized in that the rotating brushing means (19) are formed like a roller.

10. Cleaning device according to one of claims 4 to 9, characterized in that the rotating brushing means (19) with respect to a rotational axis (20) radially projecting bristles (25).

1 1. Cleaning device according to one of claims 4 to 10, characterized in that the rotating brushing means (19) at least three spatial axes, in particular about a rotation axis (20) about at least one horizontal pivot axis (36) and about a vertical axis of rotation (12), are mounted rotatably or pivotally.

12. Cleaning device according to one of claims 1 to 11, characterized in that the cleaning device comprises a pressing device, by means of which the pressing force of the rotating cleaning agent is selectable on the rotating material web.

13. Cleaning device according to claim 12, characterized in that the pressing device for adjusting the contact pressure adjusting means with a relative to the rotating cleaning means displaceable mass, in particular a displaceable counterweight has.

14. Cleaning device according to claim 13, characterized in that the displaceable mass for adjusting the contact pressure is displaceable radially relative to a pivot axis of the rotating cleaning means.

15. Cleaning device according to one of claims 13 or 14, characterized in that the displaceable mass forms a counterweight to the rotating cleaning means.

16. Cleaning device according to one of claims 13 to 15, characterized in that the displaceable mass and the rotating cleaning agent form a balance with a common point of articulation.

17. Cleaning device according to one of claims 12 to 16, characterized in that the pressing device for adjusting the contact pressure hydraulically, pneumatically and / or by means of spring force actuatable adjusting means.

18. Cleaning device according to one of claims 12 to 17, characterized in that the pressing device is a Vertikalverstelleinrichtung, by means of which the brushing means relative to the web in a vertical direction are displaced.

19. Cleaning device according to one of claims 1 to 18, characterized in that the cleaning device has a further Vertikalverstelleinrichtung (33), by means of which rotating brushing means (19), in particular a rotation axis (20) of the rotating brushing means (19), in one of the circulating material web (3) substantially vertically extending vertical plane (32) obliquely to the circumferential material web (3) are adjustable.

20. Cleaning device according to claim 19, characterized in that by means of the further Vertikalverstelleinrichtung (33) the rotating brushing means (19), in particular the axis of rotation (20) of the rotating brushing means (19), in a vertical angle (37) of up to 45 ° the circumferential material web (3) are adjustable.

21. Cleaning device according to one of claims 1 to 20, characterized in that the cleaning device has a Horizontalverstelleinrichtung (30), by means of which rotating brushing means (19), in particular a rotation axis (20) of the rotating brushing means (19) about a vertical axis of rotation (12 ) are rotatably mounted.

22. Cleaning device according to claim 21, characterized in that by means of the horizontal adjustment device (30) the rotating brushing means (19), in particular the axis of rotation (20) of the rotating brushing means (19), from a substantially transversely to the circulating material web (3) extending vertical plane (32) are displaced out.

23. Cleaning device according to one of claims 1 to 22, characterized in that rotating brushing means (19) are employed by a rotational angle of about 10 ° about a vertical axis of rotation (12) with respect to a circumferential direction of the circulating material web (3).

24. Cleaning device according to one of claims 1 to 23, characterized by a cleaning head (1) in which the vacuum chamber is arranged, wherein the cleaning head (1) is a vacuum generating device.

25. Cleaning device according to claim 24, characterized in that the cleaning head (1) is arranged loosely on a discharge device (16) for contamination.

26. Cleaning device according to one of claims 24 or 25, characterized in that the cleaning head (1) is arranged articulated on a discharge device (16) for contamination.

27. Cleaning device according to one of claims 24 to 26, characterized in that the cleaning head (1) has more than one acceleration jet nozzle ring (8, 15).

28. Cleaning device according to claim 27, characterized in that each acceleration jet nozzle ring (8, 15) has a multiplicity of acceleration jet nozzles (41, 42) directed into the cleaning head (1).

29. Cleaning device according to one of claims 27 or 28, characterized in that the acceleration jet nozzle rings (8, 15) are arranged concentrically in the cleaning head (1).

30. Cleaning device according to one of claims 24 to 29, characterized in that the cleaning head (1) has a gradually tapered Bürstenaufhahmeraum (6).

31. Cleaning device according to claim 30, characterized in that the brush holding space (6) tapers away from the circulating material web (3).

32. Cleaning device according to one of claims 1 to 31, characterized by a free of liquid nozzles vacuum chamber, in particular a liquid nozzle-free cleaning head (l).

33. Cleaning device according to one of claims 1 to 32, characterized by a heating device and / or a heat exchanger for heating process air.

34. Cleaning device according to claim 33, characterized in that by means of the heating device and / or the heat transfer, the process air to about 50 ⁰ C, preferably to about 60 ⁰ C, is heated.

35. A method for cleaning a rotating material web, such as a drying wire, in which impurities by means of rotating and lying on the rotating material web cleaning agent, such as cleaning brushes are released from the circulating material web, characterized in that the impurities by means of centrifugal forces and by means of at least one accelerated vacuum generated by the environment of the cleaning agent and transported away from the circulating material web.

36. Cleaning method according to claim 35, characterized in that air is accelerated by means of the generated vacuum through the material web (3).

37. Cleaning method according to one of claims 35 or 36, characterized in that the impurities are accelerated by means of the air flowing through the circulating material web and in this case are transported away from the circulating material web.

38. Cleaning method according to one of claims 35 to 37, characterized in that the air flowing through the material web is further accelerated by means of the generated vacuum.

39. Cleaning method according to one of claims 35 to 38, characterized in that the centrifugal forces acting on the impurities are generated by means of the rotating cleaning agent.

40. Cleaning method according to one of claims 35 to 39, characterized in that of the material web (3) dissolved and / or adhering to the rotating cleaning agents impurities are thrown by the centrifugal forces of the rotating cleaning agents.

41. Cleaning method according to one of claims 35 to 40, characterized in that by means of the generated vacuum on the material web (3) adhering impurities, of the material web (3) dissolved impurities, on the rotating cleaning agents and / or of the rotating cleaning agents dissolved impurities are sucked out of a cleaning area.

42. Cleaning method according to one of claims 35 to 41, characterized in that the vacuum is generated within a cleaning head (1) in which the cleaning means rotate.

43. Cleaning method according to one of claims 35 to 42, characterized in that by means of the vacuum, a main air volume flow, which flows from a main inlet opening to a main output opening, within the cleaning head (1) generated or at least within the cleaning head (1) is amplified.

44. Cleaning method according to one of claims 35 to 43, characterized in that the vacuum is generated within a cleaning head (1) by means of compressed air jets, which in the

Cleaning head (1) are blown.

45. Cleaning method according to claim 44, characterized in that the compressed-air jets emerge from nozzles whose outlet openings are directed away from the material web surface.

46. Cleaning method according to one of claims 44 or 45, characterized in that the compressed air jets emerge from nozzles which are arranged one behind the other in the main flow direction of the main air volume flow.

47. Cleaning method according to one of claims 35 to 45, characterized in that compressed air for generating compressed air jets is heated.

48. Cleaning method according to claim 47, characterized in that the compressed air is warmed to more than 50 ° C, preferably to 60 ⁰ C or more.

49. Cleaning method according to one of claims 35 to 48, characterized in that at least individual bristles (25) of the brushing means (19) at least partially penetrate into material-free areas, such as pores or permeabilities, of the circulating material web (3).

50. Cleaning method according to one of claims 35 to 49, characterized in that the brushing means (19) roll on the revolving material web (3).

51. Cleaning method according to one of claims 35 to 50, characterized in that the brushing means (19) are driven by the circulating material web (3).

52. Cleaning method according to one of claims 35 to 51, characterized in that the brushing means (19) rotate on a relative to the revolving material web (3) displaceable rotational axis (20).

53. Cleaning method according to one of claims 35 to 52, characterized in that the brushing means (19), in particular an axis of rotation (20) of the brushing means (19), against the circulating material web (3) are set at an angle.

54. Cleaning method according to one of claims 35 to 53, characterized in that the brushing means (19) relative to the circulating material web (3) are made radially.