WO2019114974A1

WO2019114974A1 - Gas-jet cleaning device

Info

Publication number: WO2019114974A1
Application number: PCT/EP2017/082893
Authority: WO
Inventors: Josef Weber
Original assignee: Autefa Solutions Germany Gmbh
Priority date: 2017-12-14
Filing date: 2017-12-14
Publication date: 2019-06-20

Abstract

The invention relates to a gas-jet cleaning device for removing fibers (F) or contaminants in a fiber processing system by means of a directed gas jet. The gas-jet cleaning device (1) has an outer tube (2) and an inner tube (3) arranged coaxially within the outer tube, at least one of which tubes is rotatably arranged. The gas-jet cleaning device (1), in particular the inner tube (2), can be or is connected to a gas pressure source (P+) or gas pressure sink (P-). Opening structures (4, 5) having different shapes are formed in the walls of the tubes (2, 3) in such a way that the opening structures (4, 5) form a nozzle opening by means of local overlap (6) in the case of relative rotation between the outer tube (2) and the inner tube (3), the location of the overlap (6) being adjustable by means of the relative rotational position (D) of the tubes (2, 3). The gas-jet cleaning device can be used preferably to clean fiber carriers of a fiber processing system having a working width of more than 2.5 meters, in particular at least four meters, the free distance between a fiber carrier and the gas-jet cleaning device (1) being less than 1 millimeter. In order to be able to meet these requirements, the tubes (2, 3) are formed preferably from a fiber-reinforced composite material.

Description

Gas jet cleaning _V orrichtung

DESCRIPTION

The invention relates to a cleaning device for removing fibers or contaminants in one

Fiber processing plant with a directional gas jet and an associated manufacturing process.

In fiber processing plants, textile products such as nonwovens, fabrics or yarns as well as their precursors are manufactured from single fibers. The fibers to be processed are present in a fiber processing plant at least at the beginning of a process as unconnected individual fibers. In the manufactured textile product, the fibers are generally present in an at least partially fixed form. During processing, contamination of the plant components of the fiber processing plant can occur due to fiber fly, dust formation or foreign substances being introduced. This concerns especially those areas, which the plant, which come into contact with single fibers. Targeted cleaning is only possible at a standstill in various parts of the plant, i. with a

Interruption of the production process. this applies

especially for moving parts of the plant, which are occupied by a set of hooks, needles or similar fiber mounts. There are also some

Plant components in operation no or one

difficult accessibility. Fiber processing plants often have working widths of more than 2.5 meters, especially 4 meters or more. The previously known cleaning devices are not optimally formed.

It is an object of the present invention to provide a

improved cleaning device for removing

Show fibers or impurities in a fiber processing plant.

The cleaning device according to the present

Revelation creates a directional jet of gas that can be used to selectively blow off or aspirate local areas to remove any fibers or contaminants. Thus it is a gas jet cleaning _V orrichtung.

The cleaning device comprises an outer tube and an inner tube arranged coaxially therein. At least one of the two tubes (outer tube or inner tube) is arranged rotatably about its longitudinal axis. The cleaning device, in particular the inner tube, is connected to a gas pressure source or a gas pressure sink, so that in the tubes an overpressure passage or a negative pressure passage

is formed. From the overpressure or oppression in the tubes, the energy comes to the formation of a

Gas jet.

In the walls of the tubes opening structures are formed with different shapes, so that the

Opening structures in a relative rotation between the outer tube and inner tube in each case by local overlap form a nozzle opening and the location of the overlap by the relative rotational position or rotational position of the tubes is adjustable. At the nozzle opening, a gas jet is formed as a result of the overpressure or negative pressure in the tubes, which is used for cleaning a fiber treatment plant.

The tubes of the gas jet cleaning device may be made of any material. For use in fiber processing plants with working widths from 2.5 meters or from 4 meters and above, however, there are special requirements. It will be part of the

seeks the present disclosure, the gas jet cleaning device in close proximity to a

To arrange fiber carrier such as a garnished roller or a fiber conveyor belt. The free distance between an outer contour of the fiber carrier and an outer contour of the gas jet cleaning device is

preferably less than 5 millimeters, in particular less than 1 millimeter. By such a small distance, a particularly effective cleaning is possible. A generated by the cleaning device suction jet or

Blasstrahl can by the small distance to

Fiber carrier unfold a particularly targeted effect. Furthermore, it is ensured with suction cleaning that fibers dissolved by the suction jet directly into the

Gas jet cleaning device are sucked and not be carried around in surrounding plant areas.

It is also desirable to have the full working width of the fiber processing plant with only a double tube

To span (pairing of coaxially interconnected outer tube and inner tube). In other words, the gas jet cleaning device has a length in Axial direction of the tubes of preferably at least 2.5 meters, in particular at least 4 meters, which is achieved substantially by exactly one inner tube and exactly one outer tube of the aforementioned length.

In order to meet the above requirements, high flexural rigidity with low weight and high internal stability are required. By the

Flexural rigidity with low weight makes it possible that the double tube forms only a minimal sag, so that a substantially uniform free distance between the outer contour of the fiber carrier to be cleaned and the outer contour of the gas jet cleaning device is maintained. Due to the internal stiffness is achieved that the pipes despite the introduced

Opening structures their cylindrical shape and a close

Concentricity tolerance maintained over the entire useful length so that a sufficient tightness

between the outer tube and the inner tube is achieved.

It has been shown that certain materials and

Manufacturing methods are particularly advantageous to meet the above requirements.

Preferably, the inner tube and / or the outer tube are formed from a fiber-reinforced composite material,

especially based on carbon or fiberglass. In other words, the main component of the

Fiber material for the fiber reinforced composite formed by carbon fibers or glass fibers. It has also proven to be particularly advantageous to use fiber filaments as carbon filaments or glass fiber filaments, ie continuous fibers. Preferably, at least 50% of the fibers in the tube jacket extend obliquely between the tangential direction and the axial direction. In particular, at least 30% of the fibers are preferably aligned substantially parallel to the elongate extent of the opening structure.

The outer tube and / or the inner tube for the gas jet cleaning device are preferably in a

special process, which comprises at least the following steps.

First, fiber material is wound with a matrix material to form a tubular body on a mandrel or other suitable support body. The tubular body is pre-cured on the mandrel to achieve a basic stiffness or hardness, where appropriate, it is surrounded by an outer mold. The basic stiffness is less than a final stiffness and allows a cutting

Machining the pipe body. Through the thorn or

Support body, an inner contour of the tube can be specified exactly. If necessary, an outer contour of the tube can furthermore be defined precisely by means of an outer shape. The matrix material can be any one

serve suitable material, in particular a resin or a thermoplastic material.

The at least one opening structure is formed by machining the precured tubular body, in particular during this on the mandrel or a another suitable support body is arranged. For this purpose, the outer shape can be removed. Alternatively, the outer shape can have through openings, by a

Tool for forming the opening structure can reach through to be brought into contact with the tube shell.

Finally, the tube body is finally hardened, wherein the tube body is preferably also arranged on the mandrel or a support body. Also during final curing, the tubular body may be received in an outer mold, which may be the same outer shape as in the pre-curing, or another outer shape.

The formation of the inner tube and / or the outer tube of a fiber-reinforced composite material, in particular according to the aforementioned method, offers particular

Advantages for using the gas jet

Cleaning device in a fiber processing plant. On the one hand, the fiber geometry during winding of the

Pipe body to the desired geometry of

Opening structures, in particular adapted to the pitch angle of a spiral slot. On the other hand, are achieved by the two-stage curing with intervening formation of the opening structures, that on the one hand, the tubular body in the cutting

Machining does not undergo undue deformation,

In particular, not collapsed, and on the other hand particularly clean processing edges and

Machining surfaces are achieved. That only

is precured composite material of the tubular body

in particular less brittle than in the cured state and therefore less likely to form cracks, for

Chipping surface areas or to the local

Fiber solution from the matrix.

When introducing the opening structures, a part of the fibers in the composite material is separated so that there are free fiber ends on an outer contour of a processing surface of the opening structure. It can be especially in

Surface area to a micro-detachment of a

Fiber end coming from the surrounding matrix material.

By the aforementioned parasitic effects can

Roughness or imperfections in the surface arise, the subsequent cracking or sticking of

Single fibers from the fiber processing plant could favor. By final hardening, the aforementioned parasitic effects can again be reduced or compensated. In particular, by the final curing a

Smooth the surface and make a connection between the fiber ends and the surrounding

Matrix material can be restored and / or

be solidified.

In a micro view of the surface structure of a processing surface after final hardening

Recognize edge embedding zones in which the

Matrix material envelops at least a majority of the fiber ends. Ggfs, may be additional before final hardening

Matrix material on an outer contour of a

Opening structure can be applied to support the formation of the edge embedding zones. By the

Randeinbettungszonen can thus a Surface seal are produced, the fiber ends of the fiber material in the area of an opening structure covers. The application of the additional

Matrix material preferably takes place before final curing. Alternatively, the additional matrix material may be applied during final cure.

Alternatively or additionally, a

Surface seal can be produced in other ways. For example, before, during or after the final curing on the outer contour of an opening structure a

Material layer of a different material than the

Matrix material are applied to form a surface seal. This can be for example a

Be lacquer layer.

Preferably, in the wall of the outer tube, a first opening structure with an elongated extension

formed and in the wall of the inner tube, a second and differently shaped opening structure is formed with an elongated extension. At least one of the opening structures has an oblique course with respect to the axial direction of the tubes or with respect to a tangent parallel to the axial direction on the lateral surface. The other opening structure may preferably have a parallel to the axial direction of the tubes course.

In a relative rotation between the outer tube and the inner tube, the relative rotational position of the tubes and the opening structures located thereon is changed. Where the opening structures overlap is one Through opening formed by both pipe walls, by the according to the pressure or negative pressure in the

Inner tube an outwardly or inwardly directed gas jet is formed. In other words, at one

Relative rotation between the outer tube and inner tube each formed by local coverage of the opening structures a nozzle opening. Due to the oblique course of at least one of the opening structures, the location of the overlap on the lateral surface of the tubes, and thus the location at which a nozzle opening is formed, can be set by the relative rotational position of the tubes.

The gas jet cleaning device of the aforementioned type has a particularly slim design. It can be produced in lengths of, for example, a few centimeters to a few meters.

In a fiber processing plant, the gas jet cleaning device may be in close proximity to

fiber-conveying system parts are arranged to clean them. Such plant parts can in particular fiber carrier such as conveyor rollers, Kämmwalzen or

Be conveyor belts.

A gas jet cleaning device preferably comprises a rotary drive to control the relative rotational position of

Inner tube and outer tube to change, resulting in changing the location of the overlap of the respective

Opening structures and thus leads to a change in the local position of the directed gas jet. The rotary drive can preferably change the rotational position of the outer tube. Alternatively, the rotational position of the inner tube be changed. The rotary drive can in particular cause a repetitive circular rotation of one of the tubes about its longitudinal axis. The rotary drive can be a

Have rotational angle detection, so that in particular a momentary rotational position of that tube, which extends the obliquely to the axial direction opening structure

(Spiral slot) has, can be determined and, if necessary, is regulated.

Furthermore, an actuator may be provided which controls the absolute rotational position of one of the tubes

changed to align one of the opening structures on an object to be cleaned or a cleaning zone. Preferably, that pipe is moved by an actuator, which extends in the axial direction

Opening structure has. The other tube may then be rotated relative to the one tube to dictate the location of the gas jet (on the mantle surface of the tubes) within those positions defined by the aligned opening structure of the one tube

are possible.

By a combined control and in particular

Regulation of the orientation of the axial direction

extending opening structure (axial slot /

Longitudinal slot) and a relative control or regulation of the instantaneous rotational position of the oblique to the axial direction opening structure

(Spiral slot) can a current position of a nozzle opening in the longitudinal position and a momentary

Alignment of the gas jet can be adjusted. A preferred embodiment provides that on the

Outer tube for forming the opening structure, a plurality of spiral slots is provided, which are arranged over the length of the tube in adjacent longitudinal sections. On the inner tube is to form the

Opening structure preferably a plurality of

Straight slits provided, which are arranged over the length of the tube in adjacent longitudinal sections.

Alternatively, the arrangement of inner tube and outer tube may be reversed.

The outer tube and / or the inner tube can therefore (as

Opening structure) have a plurality of slots adjacent in the longitudinal direction of the tube. It is advantageous to arrange two adjacent slots, in particular adjacent spiral slots, offset from each other in the circumferential direction of the tube. The offset angle (in the circumferential direction) can have any value. It has proved to be advantageous for internal stability to provide an offset angle greater than 90 ° and less than 270 °.

In the context of the present disclosure, it is desirable to connect the double tube exclusively at one end with a pressure source or pressure sink, because often only on one side of the system the possibility for lateral supply of lines or for direct arrangement of a suction or blowing device End of the double tube is present. Alternatively, the tube may be connected at both ends to a pressure source or pressure sink. According to a particularly preferred embodiment, the gas jet cleaning device is connected at a first end to a gas pressure source or gas pressure sink and has a bypass opening at the other end. The

Bypass opening creates a connection between the interior of the double tube, i. the gas passage, and the outside atmosphere, so that a gas flow through the inner tube or the gas passage can take place between the bypass opening and the (at the other end of the tube arranged) gas pressure source or gas pressure sink. This gas flow can be through the entire tube length or a

substantial portion of the tube length between the bypass opening and the gas pressure source or gas pressure sink extend and forms a basic flow for the continuous cleaning of the gas passage. The basic flow prevents individual fibers from settling in the gas passage, possibly to a partial or partial flow

could cause complete constipation. One on

(At least) a nozzle opening formed gas flow (jet flow) is superimposed on the basic flow. The effective diameter (throttle area) of the bypass port may optionally be adjustable to adjust the ratio between the base flow and the at least one jet flow.

Advantageous embodiments of the invention are set forth in the following description, the claims and the accompanying drawings. The invention is illustrated by way of example and schematically in the drawings. Show it:

Figure 1: A schematic oblique view of a gas jet cleaning device according to the present disclosure;

Figure 2: a sectional view according to lines II

II of the gas jet cleaning device of FIG. 1;

FIG. 3: a development illustration of FIG

Lateral surfaces of the pipes;

Figure 4: alternative embodiments of a

Opening structure;

Figure 5: a schematic side view of a

Fiber processing plant; FIGS. 6 and 7: enlarged detail views according to FIG

Excerpts VI and VII in Figure 5.

A preferred embodiment of a gas jet cleaning device (1) is shown in FIG. It comprises an outer tube (2) and an inner tube (3), which are arranged coaxially with one another, wherein the outer tube (2) at least partially surrounds the inner tube (3). Preferably, the outer circumference of the inner tube (3) contacts the inner circumference of the outer tube (2), so that a substantially gastight connection is created. Maybe you can suitable sealing means (not shown) between the inner tube (3) and the outer tube (2) may be arranged.

In the wall of the outer tube (2) is a first

Opening structure (4) formed, which in Figure 1

exemplary has the form of a spiral slot. The spiral slot can be used as a continuous slot, i. be provided as a single opening. Alternatively, the spiral slot may consist of two or more sections. Between such subregions can web-shaped

Areas of the pipe wall are present, the one

have stabilizing effect. In other words, an opening structure (4) may comprise two or more spiral slots, particularly in adjacent ones

Length sections are arranged.

On the inner tube (3), a second opening structure (5) is arranged, which is formed in the example of Figure 1 as a straight opening slot. This here

The opening slot shown is aligned substantially parallel to the longitudinal axis (A) of the tubes (2,3).

In the example of Figure 1, a bypass opening (19) is arranged at the left end of the inner tube (3)

in the present case is formed as an opening in an end cap. Alternatively or additionally, a bypass opening may pass through an opening in the pipe wall of the inner pipe (3) near the pipe end and, if necessary, one or more

be formed additional openings in the pipe wall of the outer tube (2). If necessary, a plurality of bypass openings can be provided which can be used simultaneously or selectively. The effective diameter of the (at least one) Bypass opening (19) is preferably adjustable. In the example according to FIG. 1, this can be done, for example, by exchanging the end cap. Alternatively, with a plurality of bypass ports, one or more of them may be selectively capped to adjust the effective total diameter of the bypass ports.

The effective diameter of the at least one bypass port (19) may preferably be during operation

be variable, in particular cyclically or iteratively variable, which is explained below using an example. At one end of the inner tube (3) can in

Pipe jacket one or more openings (not

shown) provided with one or more openings (not shown) in the tube jacket of

Overlap outer tube (2). In a relative rotation of the tubes (2, 3), these openings will temporarily come to cover and thus form a bypass opening and temporarily closed. Due to the number and arrangement of the plurality of openings in the tube shells, a pattern for the temporary overlapping can be specified. Due to the only temporary overlap, the changes

effective diameter of the bypass opening (s) iteratively in the course of relative rotation. While there is a large effective diameter, a comparatively large amount of gas is exchanged through the at least one bypass port (19) and vice versa by the pressure difference between the gas passage and the outside atmosphere. As a result, a substantially pulsating basic flow through the gas passage in the inner tube can be generated. It has been found that a pulsating flow can increase the cleaning effect for the gas passage. ever After the extent of the pulsation of the basic flow and a pulsation of the gas flow through the nozzle opening can be achieved, which also for the purification of a

Fiber carrier of a fiber processing plant may be advantageous.

All of the aforementioned embodiments for the formation of a bypass passage can be used alone or combined in any way.

Another embodiment, not shown, provides that a gas jet cleaning device (1) at both ends of the pipe with a gas pressure source (P +) or gas pressure sink (P-) is connected, wherein in one

Center region of the gas jet cleaning device (1) at least one bypass opening (19) is provided. In this way, two adjacent basic flows can be formed in the inner tube, each between the at least one bypass opening and a gas pressure source (P +) of the gas pressure sink (P-) on a

Extend pipe end.

The gas jet cleaning device (1) preferably comprises a holder (H) and at least one rotary drive (11), by which the relative rotational position (D) of the tubes (2, 3) so that the first and second opening structures (4, 5) changeable is.

The holder (H) is adapted to support the tubes (2, 3) relative to a body to be cleaned. In particular, it can provide a fixed support for one of the tubes, preferably for the inner tube (3). alternative Both tubes (2, 3) can be rotatably mounted, wherein one of the tubes (2, 3) by an actuator (not shown) in an absolute rotational position can be aligned, and wherein the other tube (3, 2) through the

Rotary drive relative to the first tube (2, 3) is rotatable.

The rotary drive (11) can be configured as desired. In the example of Figure 1, the rotary drive (11) is a separate drive and provided to the outer tube (2) about the longitudinal axis (A) in a permanent or

to make recurrent rotation, so that the

Rotary position (D) of the first opening structure (4) relative to the second opening structure (5) is variable.

Alternatively, the rotary drive can be formed by a mechanical derivation, for example by a belt drive. Also, the actuator can be configured arbitrarily.

Figure 3 shows a development of the lateral surface (MA) of the outer tube (2) and a resulting

Relative position between the first opening structure (4) and the second opening structure (5). In the present

For example, the first opening structure (4) has an oblique course, i. an angle of attack (W) with respect to the axial direction (A). The second opening structure (5) is aligned substantially parallel to the axial direction (A). This orientation is advantageous because a line-shaped generation area for directed gas jets (7) through the second opening structure.

is given. An overlap (6) with the first opening structure (4) or a nozzle opening can thus occur only in this generation area. The Generation area can be aligned on a surface to be cleaned, in which the absolute rotational position of the inner tube (3) is set or adjusted.

When the outer tube (2), as shown in Figure 1 is rotated counterclockwise relative to the inner tube (2), moves in the development view of Figure 3, the first opening structure (4) upwards. As a result, the region of local overlap (6) becomes more toward the left end over the second

Opening structure (5) or the generating area

positioned and vice versa. In the area of overlap

(6) of the opening structures (4, 5), a gas-conducting breakthrough through the walls of the tubes (2,3) is formed, which acts as a nozzle opening. The relative rotation of the

Outer tube (2) relative to the inner tube (3) thus causes an axial displacement of the nozzle opening.

The gas jet cleaning device (1) preferably has at least one of the pipe ends a connection to a gas pressure source (P +) or a gas pressure sink (P-). Particular preference is given to at least one end of the

Inner tube (3) arranged a suction.

Due to the overpressure or negative pressure in the tubes (2, 3), a gas jet is formed in the area of the local covering (6) or the nozzle opening. When there is a connection to a gas pressure source (P +), the gas jet is

(7) directed to the outside (see Figure 1). If, however, a connection to a gas pressure sink (P-), the gas jet (7) is directed inwards (see Figure 2). An inwardly directed gas jet (7) (suction jet) has the advantage that entrained by the gas jet impurities or fibers are discharged through the tubes (2, 3) and the connection and thus removed from a fiber processing plant.

The opening structures (4, 5) may be formed in various ways, in particular have an arbitrary shape. According to FIGS. 1 and 3

illustrated embodiment, one or both

Opening structures (4,5) as (one or more parts) line-shaped opening (8) be formed or

comprise at least one linear opening (8), in particular in the form of a straight or

spiral opening slot.

FIG. 4 shows row-shaped arrangements (9) of FIG

Openings, which may alternatively or additionally be part of at least one of the opening structures (4, 5). In the upper part of Figure 4 is a

Row arrangement (9) of substantially punctiform openings (10) shown. Such punctiform

Openings (10) can be produced for example by drilling. In the lower part of Figure 4 is a row-shaped arrangement (9) of slots or

rectangular recesses are shown, the

can be made for example by punching. Alternatively, any other forms of openings are possible, those with the same or different

Manufacturing process in the wall of the tubes (2, 3) can be introduced, for example by laser cutting. The aforementioned shapes and gradients of Opening structures (4, 5) and openings (10) can be combined with one another in any desired manner.

FIG. 2 shows a cross-sectional view according to FIG

Section lines (II-II) in Figure 1 through the tubes (2,3) of the gas jet cleaning device. In this

Representation is assumed that the interior of the tubes (2, 3) with a gas pressure sink (P-) is connected, so that in the region of the cover (5) and the nozzle opening, a suction jet (7) is formed.

In addition to the gas jet cleaning device (1) is a body to be cleaned, here a garnished roller (15) shown. In the context of the present disclosure, a garnished roll is understood to mean a roll body on whose surface a set of fiber-taker structures is arranged, for example in the form of protruding hooks or needles. Such garnished rolls are often used in fiber processing to

Staple fibers open or carding processes

perform. Garnished rolls are particularly difficult to clean during operation, since on the one hand the

Fibers or contaminants strongly adhere to the clothing and on the other hand a manual access

Safety reasons during operation is excluded.

By disposing a gas jet cleaning apparatus according to the present disclosure adjacent to a garnished roll, a very effective cleaning can be achieved. The gas jet can be moved controlled for local action. The suction or blowing power of a directed gas jet can be significantly higher, especially with the same pressure generation as in so-called.

Air Swords.

On at least one of the tubes (2, 3) can

Multiple arrangements of the opening structures (4, 5)

be provided. In FIG. 2, by way of example, a second gas jet (7 ') is indicated which could be generated by a second straight opening slot on the underside of the inner tube (2) and its overlap with the spiral slot in the outer tube (2). Generally speaking, between the opening structures (4, 5), two or more covers (6) may be simultaneously generated to produce two or more gas jets (7, 7 '). In order to ensure a good suction or blowing power, it might make sense to increase the number of covers (6) to a range of 1 to 20 and in particular 1 to 5

restrict .

In the area of an overlap (6) between the

Opening structures (4, 5) becomes more effective

Flow cross-section formed, which is much smaller than the flow cross-section of the passage in the tubes (2, 3). Accordingly, a nozzle effect is generated, which leads to an acceleration of the gas flow and a

Alignment of the gas jet (7) leads. Furthermore, the boundary contours of the openings (10) or slots (8) can make a contribution to the alignment of the gas jet (7).

According to a preferred embodiment variant, a straight slot extending substantially in the axial direction (A) is arranged on the inner tube (3), wherein this slot and the relative position of the inner tube is fixed to the body to be cleaned, in which positions and directions basically a gas jet (7) can be formed. For this purpose, the inner tube (3), for example, in a holder (H) rotatably disposed, wherein the outer tube (2) relative to the inner tube (3) is rotatably mounted and driven. By the

Rotation of the outer tube (2), the location of the cover (6) and the formation of the nozzle opening is determined and thus selected, at which specific position

Gas jet (7) is currently generated. If the outer tube (2) as shown in Figures 1 and 3 a

Spiral slot (8), in the aforementioned embodiment, the location of the cover (6) in the

Axial direction (A) from one end of the second

Opening structure (5) moved to the other end. In other words, a gas jet (7) is generated, which in the

Axial direction (A) wanders.

With an appropriate length of the gas jet

Cleaning device (1), the gas jet (7) can be performed over the entire width of the body to be cleaned, so that he in a preferably continuous process from left to right or from right to left a surface suction or a surface blowing of the

Causes fibers. Alternatively, two or more

Gas jet cleaning devices (1) or their tubes (2, 3) in the axial direction (A) to be arranged one behind the other. Here, the passages of these tubes (2, 3) may be interconnected, so that only one connection to a gas pressure source (P +) or a gas pressure sink (P-) is required. FIG. 5 shows a schematic side view of a fiber processing plant (12). In the left area of Figure 5, a fiber feed (13) is shown, which may be of any design, for example as

Feed chute or Rüttelschachtspeiser. In the fiber feed (13), for example, from a

Bales taken off and compacted single fibers

supplied, which are stored as a fiber mat (18) on a conveyor belt (14). Following are the

Single fibers or the fiber mat (18) one

Processing process in which, for example, a carding or combing of the fibers takes place. In the example of FIG. 5, the fiber mat (18) is transferred to a spool roller (17), on whose circumference one or more garnished rollers (15) are arranged, which run in synchronism or counter rotation to the spool roller (17). are driven.

FIG. 6 shows an engagement region between a garnished roll (15) and the fiber mat (18) on the spool roller (17). The clothing of the roller (15) engages in the fiber mat (18) and takes with parts of the fibers contained or rearranges them. As a result, a homogenization of the structure in the fiber mat (18) is achieved. However, fiber breakage and dust formation can occur at the same time. Furthermore, knots of fibers on the clothing are possible.

By cleaning the garnished roll (15), an improved fiber processing result can be achieved, for example because impurities are removed and

Structural weakenings through introduction of Fiber fragments are reduced or avoided. By disposing the gas jet cleaning apparatus (1) according to the present disclosure adjacent to the garnished roll (15), effective extraction of rupture fibers and contaminants from the garnish is also possible during operation, so that the processing process at longer operating intervals and with an improved result is feasible.

Particularly preferably, the inner tube (3) with the second opening structure (5) with respect to the rotational position relative to the garnished roller (15) is adjustable. In this way, the pressure angle of the directed gas jet (7) can be adjusted to match the clothing of the roller (15). It may also be advantageous to provide the distance of the gas jet cleaning device (1) to the body to be cleaned, here the garnieten roller (15) adjustable. The adjustment can be done manually or by an actuator.

FIG. 7 shows a second gas jet cleaning device (1 ') according to the present disclosure with a

Arrangement between two garnished rollers (16) according to detail VII in FIG. 5.

In the example shown it is provided that the

Inner tube (3) with the second opening structure (5), in particular parallel to the axial direction (A)

extending opening slot (8) alternately to the one or the other roller of the roller pair (16) is alignable. For this purpose, for example, a separate

Actuator be provided which the alignment of second opening structure iteratively pivots between the rollers back and forth. The outer tube (2) is rotated by a rotary drive (11) about the longitudinal axis (A) analogous to the above explanations, so that the spiral slot causes the displacement of the position of the cover (6) along the axial direction (A). That way you can

alternately over the circumference of the one and the circumference of the other roller reciprocating gas jets (7, 7 ') with only one gas jet cleaning device (1') are generated.

The gas jet cleaning device (1 ') according to the aforementioned embodiment accordingly preferably comprises a rotary drive for one of the tubes (2, 3) and an actuator for aligning the respective other tube (2, 3).

Alternatively, the arrangement of two straight opening slots explained above with reference to FIG. 2 may be provided on the inner tube (3), wherein the one opening slot is directed towards the one roller and the other opening slot towards the other roller of the pair of rollers (16). In such a case, two directional can simultaneously

Gas jets (7, 7 ') are generated.

In the aforementioned embodiments, it is assumed that the inner tube (3) has a rotationally fixed

Arrangement or is aligned by an actuator so that desired basic positions for the formation of a gas jet (7) are given, while the outer tube (2) by a rotary drive in a preferably uniform or repeated rotational movement is offset to specify the concrete formation of the gas jet (7) within these basic positions. This training has the advantage that at the in the

Essentially constantly moving outer tube (2) no

Can form deposits. In other words, the gas jet cleaning device in this embodiment has a self-cleaning function.

Alternatively, the inner tube and the outer tube may have reverse kinematics.

Generally speaking, the rotationally fixed or can be aligned by an actuator opening structure (4, 5) on one of the tubes (2,3) preferably has a shape that is a basic orientation of the possible

Gas jets (7) causes a cleaning zone. The cleaning zone may, in particular, be a band-shaped area next to the gas jet cleaning device (1). The respective other opening structure is preferably oblique to the first opening structure or obliquely to the

Aligned cleaning zone and arranged on the repeatedly or continuously rotated other tube to the location of the local overlap and thus the concrete

Design of the gas jet (7) pretend.

Modifications of the invention are possible in various ways. In particular, the to the

Embodiments shown, described or claimed features combined in any manner with each other, be replaced or omitted. The gas jet cleaning device may include a

Have beam control, by which at least one of the tubes (2, 3) is position-controlled movable, so that the location of the cover (6) or the location of the formation of the gas jet (7) is selectively adjustable. The controller can preferably be connected to a detection device which determines local deposits in a cleaning zone, so that a gas jet (7) can be generated specifically for the local removal of these deposits, in particular under controlled or controlled movement of at least one of the tubes (2, 3). ,

LIST OF REFERENCE NUMBERS

1, gas jet cleaning device

1

2 outer tube

3 inner tube

4 First opening structure / slot

5 Second opening structure / slot

6 Local overlap = nozzle opening

7, gas jet / directed gas jet

7 '

8 Line-shaped opening / slot

9 Row arrangement of openings

row of holes

10 point-shaped opening

11 rotary drive

12 fiber processing plant

13 fiber feed

14 conveyor belt

15 Garnished roller

16 Garnished roller (pair)

17 Tambour roller

18 fiber mat

19 Bypass opening

A axial direction / longitudinal axis

D (relative) rotational position

F fibers / deposits

H bracket

MA lateral surface of the outer tube

P + gas pressure source

P- gas pressure sink

W angle of attack

Claims

Gas jet cleaning device for removing fibers (F) or impurities in a fiber processing plant with a directed gas jet, characterized in that the gas jet cleaning device (1) has an outer tube (2) and an inner tube (3) arranged coaxially therein of which at least one is rotatably arranged, and wherein the gas jet cleaning device (1), in particular the inner tube (2), with a

Gas pressure source (P +) or gas pressure sink (P-)

is connectable, and wherein in the walls of the tubes (2, 3) opening structures (4, 5) with

are formed in different shapes, so that the opening structures (4, 5) in a relative rotation between the outer tube (2) and inner tube (3) each form a nozzle opening by local coverage (6) and the location of the cover (6) by the relative rotational position (D ) of the tubes (2, 3)

is adjustable.

2.) gas jet cleaning device according to claim 1,

wherein the inner tube (2) and / or the outer tube (3) is formed of a fiber-reinforced composite material.

3.) gas jet cleaning device according to claim 1 or 2, wherein the fiber-reinforced composite material for the inner tube (2) and / or the outer tube (3) as the main constituent of the fiber material comprises carbon fibers or glass fibers, in particular in the form of carbon filaments or glass fiber filaments.

4.) Gas jet cleaning device according to claim 1, 2 or 3, wherein the gas jet cleaning device (1) at a first end with a gas pressure source (P +) or a gas pressure sink (P-) is connected and at the other end a bypass opening to

Outside atmosphere has, so between the

Bypass opening and the gas pressure source (P +) or gas pressure sink (P-) a gas flow through the

Inner tube (3) can take place.

5.) gas jet cleaning device according to one of

The preceding claims, wherein the gas jet cleaning device (1) has a length in the

Axial direction of the tubes (2, 3) of at least 2.5 meters, in particular at least 4 meters.

6.) gas jet cleaning device according to one of

preceding claims, wherein a

Opening structure (4, 5) in the outer tube (2) and / or inner tube (3) has a surface seal.

7.) Gas jet cleaning device after the

previous claim, wherein a

Surface sealing is formed by Rand Embedding zones of fiber ends, in which the

Matrix material at least a majority of

Wrapped fiber ends, the edge embedding zones in particular by a final hardening of the

fiber reinforced composite material after the

Generating the opening structure (4, 5) are generated in the tube.

8.) gas jet cleaning device according to one of

preceding claims, wherein at least in the region of an opening structure (4, 5) a

Surface sealing by an additional

Material layer is present, which is applied to an outer contour of the opening structure, in particular by a lacquer layer.

9.) gas jet cleaning device according to one of

preceding claims, wherein in the wall of the outer tube (1) a first opening structure (4) is formed with an elongated extent and in the wall of the inner tube (3) a second and differently shaped opening structure (5) is formed with an elongated extent.

10.) Gas jet cleaning device according to one of the preceding claims, wherein at least one of the opening structures (4, 5) has a substantially parallel to the axial direction (A) of the tubes (2, 3) directed course, in particular the

Opening structure (5) on the inner tube (3).

11.) gas jet cleaning device according to one of

preceding claims, wherein at least one of the opening structures (4, 5) one opposite to the

Axial direction (A) of the tubes (2, 3) has oblique course, in particular the opening structure (4) on

Outer tube (1).

12.) gas jet cleaning device according to one of

preceding claims, wherein a

Opening structure (4, 5) at least one

line-shaped opening (8), in particular at least one opening slot.

13) Gas jet cleaning device according to one of

preceding claims, wherein a

Opening structure (4, 5) comprises a row-shaped arrangement (9) of openings, in particular a

Row of holes or a row of slots.

14.) gas jet cleaning device according to one of

The preceding claims, wherein the gas jet cleaning device (1) at least one

Rotary drive (11) for one of the tubes (2, 3).

15) gas jet cleaning device according to one of the preceding claims, wherein the inner tube (3) is guided gas-tight in the outer tube (2).

16.) gas jet cleaning device according to one of

previous claims, wherein the outer tube (2) has an opening structure (4) in the form of a

Spiral slot or a plurality of spiral slots, which are arranged over the length of the tube in adjacent lengths.

17. Gas jet cleaning device according to one of

previous claims, wherein the inner tube (3) has an opening structure (5) in the form of a

Has substantially straight slot extending in the axial direction or a plurality of

Straight Schlit zen, which are arranged over the length of the tube in adjacent lengths.

18) gas jet cleaning device, wherein the outer tube (2) and / or the inner tube (3) has a plurality of in the longitudinal direction of the tube (2, 3) adjacent slots, wherein two adjacent slots each in the circumferential direction of the tube (2, 3)

offset from each other, in particular by an offset angle of more than 90 ° and less than 210 °.

19.) gas jet cleaning device according to one of

preceding claims, wherein the inner tube (3) with a holder (H) is connected to the rotationally fixed arrangement and the outer tube (2) is rotatably mounted and driven.

20.) fiber processing plant, comprising at least one gas jet cleaning device (1) according to one of the preceding claims.

21) fiber processing plant according to the preceding claim, wherein the fiber treatment plant comprises a fiber carrier, in particular a garnished roller (15, 16) or a fiber conveyor belt, and wherein a gas jet cleaning device (1) is arranged adjacent to the fiber carrier, in particular the free distance between an outer contour of the

Fiber carrier and an outer contour of the gas jet cleaning device (1) is less than 5 millimeters, in particular less than 1 millimeter.

22.) fiber processing plant according to one of

preceding claims, wherein a tube (2, 3) of a gas jet cleaning device (1, 1 ') of a roller to be cleaned (15, 16) or a belt to be cleaned (14) is driven.

23) A manufacturing method for producing at least one tube (2, 3) for a gas jet cleaning device (1, 1 ') according to any one of the preceding claims, characterized by the following steps:

Winding a fiber material with a matrix material on a mandrel to form a tubular body; Precuring the tubular body on the mandrel to achieve a basic rigidity that permits machining;

Machining the precured tube body on the mandrel or a support body for forming the opening structure (4, 5);

Final hardening of the machined tubular body on the mandrel or a support body.

24.) Production method after the preceding one

Claim, wherein the fiber material for forming the tubular body is formed by filaments,

in particular by carbon filaments or glass fiber filaments.

25.) Production method according to one of the preceding claims, wherein the fiber material is impregnated with a resin as a matrix former.

26.) Production method according to one of the preceding claims, wherein after the preparation of a

Opening structure (4, 5) at least in the region of an outer contour of the opening structure a

Surface seal is generated. Production method according to one of the preceding

Claims, wherein before the final curing or during the final curing additional matrix material is applied to an outer contour of the opening structure, in particular to form a

Surface sealing by covering of

Fiber ends of the fiber material. Production method according to one of the preceding

Claims, wherein before, during or after the

Final curing on the outer contour of the opening structure, a material layer to form a

Surface seal is applied,

in particular a lacquer layer.