EP3431641A1 - Cleaning device - Google Patents

Abstract

The invention relates to a device for cleaning fiber material supplied in a conveying air flow (13) with an inlet (3) and an outlet (4), with a single cleaning roller (4) equipped with impact elements (12) and a longitudinal axis (5). 1) and with a below the cleaning roller (1) arranged grate (6) and a housing (2). The housing (2) is provided above the cleaning roller (1) with guide elements (9) forming transfer chambers (8) for the helical deflection of the conveying air flow (13) about the cleaning roller (1). Seen in the direction of the longitudinal axis (5), the inlet (3) is arranged centrally to the cleaning roller (1). In the region of a first end (14) of the cleaning roller (1) is a first outlet opening (15) and in the region of a second end (16) of the cleaning roller (1), a second outlet opening (17) in the housing (2) is provided. The first outlet opening (15) and the second outlet opening (17) are combined with a transport line (18) to form an outlet (4). The guide elements (9) are designed or arranged in such a way that the conveyor air flow (13) leading to the fiber flakes can be divided into a first and second subset (19, 20) and the subsets (19, 20) through the transfer chambers (8) in the opposite direction (21, 22) to each other in the direction of the longitudinal axis (5) to the respective outlet (15, 17) are guided.

Description

The invention relates to a device, or a method for cleaning, fed to the device fiber flakes with an inlet and at least one outlet for the fiber material, which is supplied via the inlet of a single, occupied with impact elements, a longitudinal axis having cleaning roller and a housing wherein the housing is provided above the cleaning roller with Leitleit forming transfer chambers for the spiral deflection of the conveying air flow around the cleaning roller and the inlet and the at least one outlet are attached to the housing.

Such cleaning machines are already known and serve to dissolve in a conveying air flow of the cleaning machine supplied fiber flakes and to remove impurities therefrom. The fiber flakes are dragged over the grids under the action of a rotating cleaning roller provided with impactors and knocked to some extent by the impact on the walls delimiting the transfer chambers, whereby impurities are released from the fiber flakes and separated by the grate. In the transfer chambers guide elements in the form of z. B. spirally mounted baffles over which the fiber flakes are conveyed from an inlet to an outlet of the cleaning device axially parallel to the longitudinal axis of the cleaning roller spirally. Such designs are for example from the publications of EP 0 379 726 A1 , the EP 0 381 860 A2 and the EP 0 477 966 A1 refer to.

Furthermore, embodiments of cleaning devices have been proposed, wherein two successive cleaning rollers are provided to perform the cleaning of the fiber flakes. Such designs are z. B. from the publications of DE 697 04 462 T2 and the EP 2 557 208 B1 known. With such embodiments, it is possible to achieve a higher productivity of the cleaning device, especially since the separation surface for the deposition of impurities can be increased. In DE'462 two parallel offset cleaning rollers are proposed, which at a first cleaning stage with a first cleaning roller pre-cleaned fiber flakes are spirally delivered at a transfer point to a second purification stage. The fiber flakes guided into the second cleaning stage are further cleaned and fed to an outlet, from which they are discharged to downstream machines. The drive of this cleaning device is very expensive, especially since each cleaning roller of the cleaning stages is provided with a separate drive. In addition, a large amount of space in the spinning is necessary in this arrangement. There is also the danger of blockages in the area of the transfer point between the two purification stages.

The quoted EP 2 557 208 B1 has a cleaning device, wherein also two mutually parallel cleaning rollers are provided. In contrast to the design of DE'462, the two cleaning rollers are arranged at a parallel distance directly next to each other. Fiber flocculation is also solved differently in the example of EP'208 than in the version of DE'462. The, the cleaning device (EP'208) supplied fiber flakes are divided in the region of an inlet via appropriately provided elements (release agent) into two fiber flake streams before the fiber flakes are fed in the middle of a first cleaning roller. Subsequently, the two fiber flock streams are transferred from the center of the first cleaning roller under the action of, in an upper housing portion correspondingly mounted baffles, in the opposite direction to a respective transfer opening to a subsequent cleaning stage with a further cleaning roller. Ie. in the region of each of the two ends of the first cleaning roller a transfer opening to the subsequent cleaning stage is provided.

In the second subsequent cleaning step, the fiber flakes supplied in the region of both ends of the second cleaning roller are conveyed spirally under the action of correspondingly arranged guide plates into the center of the cleaning roller and fed to a common outlet. Also in this embodiment, the drive due to the offset drive rollers of the two cleaning rollers is complex and therefore expensive, especially since the synchronization of the two cleaning rollers must be considered. Likewise, there is also the danger of blockages in the transfer area from the first to the second cleaning stage. Already at the feeder of Fiber flakes in the inlet, in which separation elements are provided for the separation of the fiber flakes can lead to disturbances, or unwanted fiber accumulation, which can lead to blockages in the worst case. Furthermore, the embodiment shown also requires a considerable amount of space in the spinning mill.

The invention is based on the object of proposing a device for cleaning fiber flakes, which avoids the disadvantages of known designs described above and allows trouble-free processing of fiber flakes and a small footprint in the spinning with high productivity.

This object is achieved by apparatus and method having the features of the independent claims.

The invention relates to a device for cleaning fiber flocks fed in a conveying air stream, comprising an inlet and an outlet, a single impacting roller, a longitudinal axis having a cleaning roller and a grate arranged below the cleaning roller and a housing, the housing being above the cleaning roller is provided with transfer chambers forming guide elements for the spiral deflection of the conveying air flow around the cleaning roller. Viewed in the direction of the longitudinal axis of the inlet is arranged centrally of the cleaning roller and provided in the region of a first end of the cleaning roller, a first outlet opening and in the region of a second end of the cleaning roller, a second outlet opening in the housing. The first outlet opening and the second outlet opening are combined with a transport line to an outlet. The guide elements are designed or arranged in such a way that the conveying air flow leading to the fiber flakes can be divided into a first and second subset and the subsets are guided through the transfer chambers in opposite directions in the direction of the longitudinal axis to the respective outlet.

In the proposed solution, on the one hand the drive is simplified, especially since only one axis of the single cleaning roller is to drive, and on the other hand is also by the direct supply of the entire fiber flake mass to the cleaning drum, or to the grate underneath excluded a possible risk of clogging in this area. The separation of the conveying air flow and thereby also the fiber flakes in two subsets takes place only after the supplied fiber flakes have passed the first time rust. Then, the fiber flakes are divided into two subsets under the action of appropriately arranged guide elements and provided on the cleaning drum striking elements. These subsets are then spirally fed in the opposite direction around the cleaning roller to a respective outlet opening. About a transport line, the two outlet openings are merged into a spout. Thus, no transfer point to a subsequent second cleaning stage is necessary.

Advantageously, the cleaning roller in the direction of the longitudinal axis has a length of 2.5 m to 5 m, particularly preferably a length of 3 m. This results in a high productivity of the cleaning device with a small footprint. An enlargement of the separation surface can be achieved without increasing the required space requirement in the spinning mill to an undesired size.

Preferably, the guide elements consist of several, spaced apart, at an angle of 5 to 20 degrees to the longitudinal axis extending baffles. The angle of the baffles for the movement of the first subset to the first end of the cleaning roller is arranged opposite to the angle of the baffles for the movement of the second subset to the second end of the cleaning roller. For an already known design of guide elements in the form of baffles is proposed, which has been proven.

Thus, the separation of the supplied fiber material in a first and a second subset after leaving the grate can be carried out targeted and timely, it is also proposed that - seen in the direction of rotation of the cleaning roller - connect the baffles in the inlet directly to the end of the grate , Thus, the separation of the conveying air flow and thereby also the fiber flakes is made directly after leaving the grate.

In order to enable a flawless and trouble-free supply and removal of the fiber material, it is further proposed that the central inlet and the respective outlet opening at the ends of the cleaning roller are arranged tangentially to the surface of the cleaning roller.

Furthermore, it is proposed that the cleaning roller has a diameter of 500 mm to 1000 mm, preferably a diameter of 650 mm. Even with this design, the productivity can be increased in a small footprint.

The grate used for the deposition can be formed over the length of the cleaning roller in a plurality, preferably two sections. The composite of a variety of grate bars rust can be varied by inserting different types of grate bars. Advantageously, the grate bars are repeatedly supported in their course along the longitudinal axis. It is also conceivable that the grate bars can be adjusted by a corresponding device in position relative to the cleaning roller. It is known to connect the grate bars together and to provide at one end of the cleaning roller with an adjustment. The adjusting device can be carried out manually or driven. In this case, the distance of the grate bars and their angular position to the surface of the cleaning drum are changed by rotating the grate bars about their own axis. Also, a device is conceivable which allows a delivery in the radial direction to the cleaning roller.

For further improvement, the grate bars are divided into two or more sectors. The fiber flakes are guided in their course over the grate one after the other over the different sectors of the grate bars. For example, the first half of the grate bars along the surface of the cleaning roller in a first sector summarized and the second half of the grate bars along the surface of the cleaning roller in a second sector. The fiber flakes guided by the cleaning roller over the grate are thus transported successively over the first and second sectors of the grate. This results in the possibility to set the grate bars of the first sector different from the grate bars of the second sector. The differences can be, for example, in the angular position, in the distance of the grate bars be with each other or at the distance of the grate bars to the surface of the cleaning roller.

It is particularly advantageous if the two sectors are in turn coupled after presetting the grate bars. This makes it possible to adjust the grate bars of both sectors similar in an adjustment of the grate, regardless of their default setting. Other combinations of grate divisions, coupling of motions of grate bars combined into groups, segments or sectors are also conceivable. A similar division can also take place in the direction of the longitudinal axis, whereby, for example, the fiber material is transported via the spiral path from the center to the end of the cleaning roller via differently set grate elements.

Preferably, it is further proposed that the cleaning roller is provided with impact elements in the form of hook-shaped drivers for transporting the fiber flakes. This ensures the proper transport of the fiber flakes and an optimal cleaning effect in the cleaning device.

Further, a method for cleaning transported in a conveying air flow fiber flakes is proposed with a device having an inlet and a spout, with a single longitudinal axis having a cleaning roller and arranged below the cleaning roller grate and with a housing which is provided with a plurality of guide elements for spiral Deflection of the conveying air flow is provided. The conveying air flow is guided centrally between the two ends of the cleaning roller through a central inlet to the cleaning roller and moved over the grate. Subsequently, the conveying air flow leading to the fiber flakes is divided into two subsets by the cleaning roller in cooperation with the guide elements, which are conveyed in the opposite direction, viewed in the direction of the longitudinal axis of the cleaning roller, spirally around the cleaning roller to the respective roller end of the cleaning roller. The conveying air streams of the respective subset are provided by a, at the respective end of the cleaning roller Outlet issued and merged with a transport line to a spout.

Even with the proposed method, a simple and trouble-free processing of fiber flakes is ensured and allows high productivity with a small footprint.

Further advantages of the invention will be shown and described in more detail in the following figures.

Figur 1

eine schematische Darstellung einer bekannten Reinigungsmaschine

Figur 2

eine schematische Darstellung einer Seitenansicht in Richtung X nach Figur 1 mit teilweiser Schnittdarstellung

Figur 3

eine schematische Darstellung einer Ausführungsform einer Reinigungsmaschine

Figur 4

eine schematische Darstellung einer Seitenansicht in Richtung Y nach Figur 3 mit teilweiser Schnittdarstellung

Show it

FIG. 1

a schematic representation of a known cleaning machine

FIG. 2

a schematic representation of a side view in the X direction FIG. 1 with partial sectional view

FIG. 3

a schematic representation of an embodiment of a cleaning machine

FIG. 4

a schematic representation of a side view in the direction Y to FIG. 3 with partial sectional view

Fig.1 and Fig. 2 show a schematic representation of a known cleaning device, with a cleaning roller 1, which is rotatably mounted about a shaft about a longitudinal axis 5 in a housing 2. As seen from the side view in direction X from the Fig.2 can be seen, the shaft is driven by a drive 10 shown schematically. On the peripheral surface of the cleaning roller 1, a plurality of striking elements 11 is attached. The cleaning roller 1 is moved via the drive 10 in a direction of rotation 23. Below the cleaning roller 1, a grate 6 is mounted in the housing 2. The grate 6 has a plurality of juxtaposed, spaced at a distance grate bars 7 and can - seen in the direction of rotation 23 - also be formed in several parts.

On the one side of the housing 2, an inlet 3 is provided. On the opposite side of the housing 2, an outlet 4 is provided. Above the cleaning roller 1 and between the inlet 3 and the outlet 4 spirally (or helically) attached guide elements in the form of baffles 9 are provided. The baffles 9 are mounted at a constant distance from each other and form between them so-called transfer chambers 8. The helical arrangement of the guide elements (or the angle α to the longitudinal axis 5) is chosen so that the, via the inlet 3 in a conveying air flow thirteenth supplied fiber flakes are conveyed spirally in the transport direction 12 to the outlet 4 and thereby repeatedly passed over the grate 6.

In operation, the cleaning device to be cleaned and dissolved fiber flakes are fed in a conveying air stream 13 through the inlet 3. The conveying air flow 13 with the fiber flakes then flows several times around the underside of the cleaning roller 1 and therebetween in each case one after the other through the respective transfer chambers 8 above the upper side of the cleaning roller 1 in order finally to leave the housing 2 via the outlet 4. When walking around the underside of the cleaning roller 1, the fiber flakes are processed by the impact elements 11 and the grate 6 and increasingly dissolved, wherein the impurities present in the fiber flakes are released and deposited by the grate 6 under the action of centrifugal force. The impurities thus deposited are removed by means not shown in detail, for example suction lines.

In the FIG. 3 and FIG. 4 is shown in a schematic representation of an embodiment, wherein the representation of FIG. 4 a side view Y after FIG. 3 shows. In the cleaning device shown, a grate 6 with grate bars 7 is arranged below a cleaning roller 1 provided with striking elements 11. The cleaning roller 1 is rotatably mounted about a longitudinal axis 5 in the housing 2. About the drive 10 shown schematically, the cleaning roller 1 is driven in a rotational direction 23. It is attached to the cleaning roller 1 tangentially aligned inlet 3 centered to the cleaning roller 1. The inlet 3 opens on the opposite side of the grate 6 and above the cleaning roller 1 in the housing 2. In the region of the two ends 14 and 16 of the cleaning roller 1 each have a tangentially oriented outlet opening 15 and 17 is provided. Here are the two outlet openings 15 and 17 arranged in relation to the longitudinal axis 5 on the same side to the cleaning roller 1, while the inlet 3 - seen in the direction of rotation 23 - offset approximately 180 ° at a parallel distance b on the opposite side to the outlet openings 15 and 17 is mounted.

Between the inlet 3 - seen in the direction of the longitudinal axis 5 - and the first outlet opening 15 guide elements in the form of baffles 9 are provided above the cleaning roller. The baffles 9 are mounted helically and extend at an angle α to the longitudinal axis 5. The baffles 9 are at a constant distance from each other and form so-called transfer chambers 8. By appropriately trained spiral shape of the guide elements is a first subset 19, the inlet 3 supplied Fiber flakes transported in the transport direction 21 to the first outlet opening 15.

Furthermore, between the inlet 3 - seen in the direction of the longitudinal axis 5 - and the second outlet opening 17 above the cleaning roller 1 also guide elements in the form of baffles 9 are provided. The baffles 9 are arranged in mirror image to the arrangement of the baffles 9 between the inlet 3 and the first end 14 of the cleaning roller 1. Due to the correspondingly formed spiral course of the transfer chambers 8 formed by the guide plates, the second subset 20 of the inlet 3 fed fiber flakes in the transport direction 22 to the second outlet opening 17 is conveyed.

As described below, the distribution of the flow 13 and thus the fiber flakes in two subsets 19 and 20 takes place only after it has passed the grate 6 for the first time.

Viewed in the direction of rotation 23 of the cleaning roller 1, the ends 25 of the baffles 9, which are mounted directly in the region of the inlet 3, mounted at a small distance a to one end 24 of the grate 6 to the division of the conveying air stream 13 in two subsets 19th and 20 immediately after leaving the grate 6 make. How out FIG. 4 can be seen, push the ends 25 of the baffles. 9 directly against each other and thus form a separation point for the two subsets 19 and 20 of the conveying air stream 13, as indicated by arrows. The ends of the further baffles 9 (seen in the direction of rotation 23), which - viewed in the direction of the longitudinal axis 5 - are mounted at a distance from the inlet 3, may have a greater distance a to the grate end 24, such as schematically in FIG FIG. 1 will be shown. Depending on the design of the baffles 9, it is also conceivable to arrange the ends 25 of the direct mounted in the region of the inlet 3 baffles 9 also at a greater distance a to the end 24 of the grate 6 (seen in the direction of rotation 23), provided a problem-free division of the conveying air flow is ensured before it crosses the grate 6 for the second time.

The, from the respective outlet opening 15 and 17 discharged subsets 19 and 20 are summarized via a schematically illustrated transport line 18 to a spout 4. The outlet 4 leaving conveyor air stream 13 is transported to a subsequent machine for further processing. The arrangement of the transport line 18 can be chosen arbitrarily between the two outlet openings 15 and 17.

By the inventively proposed cleaning device, it is possible to increase the productivity of this device by the use of a cleaning roller 1 with a length c of 3 m and more, without the space required in the spinning is substantially increased. In addition, by an increase in the diameter d of the cleaning roller to 650 mm and more, the available processing area (grate area) can be increased, which also an increase in productivity is achieved without much space. Due to the proposed design, it is not necessary to provide dividing elements for dividing the fiber flakes into two halves already in the region of the inlet.

Legend

1

cleaning roller

2

casing

3

enema

4

outlet

5

longitudinal axis

6

rust

7

grate bar

8th

transfer chamber

9

baffle

10

drive

11

beaters

12

transport direction

13

Conveying air stream

14

First end of the cleaning roller

15

First outlet opening

16

Second end of the cleaning roller

17

Second outlet opening

18

transport line

19, 20

subsets

21, 22

transport direction

23

direction of rotation

24

End of the grate

25

End of the baffles

α

corner

a

Distance baffle

b

Distance from inlet to outlet

c

Length of cleaning roller

d

Diameter cleaning roller

Claims (8)

Apparatus for cleaning fiber flocks fed in a conveying air stream (13) with an inlet (3) and an outlet (4), with a single cleaning roller (1) having impact elements (12), a longitudinal axis (5) and with a below the cleaning roller (1) arranged grate (6) and a housing (2), wherein the housing (2) above the cleaning roller (1) with transfer chambers (8) forming guide elements (9) for the spiral deflection of the conveying air flow (13) to the cleaning roller (1), characterized in that in the direction of the longitudinal axis (5) seen the inlet (3) is arranged centrally to the cleaning roller (1) and in the region of a first end (14) of the cleaning roller (1) has a first outlet opening (15 ) and in the region of a second end (16) of the cleaning roller (1) a second outlet opening (17) in the housing (2) are provided, wherein the first outlet opening (15) and the second outlet opening (17) with a transport line (18) are merged into an outlet (4), and that the guide elements (9) are formed or arranged such that the fiber fluff leading conveying air stream (13) into a first and second subset (19, 20) is divisible and the subsets (19, 20) through the transfer chambers (8) in the opposite direction (21, 22) to each other in the direction of the longitudinal axis (5) to the respective outlet (15, 17) are guided. Apparatus according to claim 1, characterized in that the cleaning roller (1) in the direction of the longitudinal axis (5) has a length (c) of 2.5 m to 5 m, preferably a length (c) of 3 m. Apparatus according to claim 1 or 2, characterized in that the guide elements (9) consist of a plurality of spaced-apart, at an angle (a) of 5 to 20 degrees to the longitudinal axis (5) extending baffles, wherein the angle (a) the guide plates for the movement of the first subset (19) to the first end (14) of the cleaning roller (1) opposite to the angle (a) of the guide plates for the movement of the second subset (20) to the second end (16) of the cleaning roller (1) is arranged. Device according to one of the preceding claims, characterized in that - seen in a direction of rotation (23) of the cleaning roller (1) - the guide elements (9) in the region of the inlet (3) directly to the end (24) of the grate (6) connect , Device according to one of the preceding claims, characterized in that the inlet (3) and the outlet openings (15, 17) are arranged tangentially to the surface of the cleaning roller (1). Device according to one of the preceding claims, characterized in that the cleaning roller (1) has a diameter (d) of 500 mm to 1000 mm, preferably a diameter (d) of 650 mm. Device according to one of the preceding claims, characterized in that the cleaning roller (1) is provided with impact elements (11) in the form of hook-shaped drivers for transporting the fiber flakes. Method for cleaning fiber flakes transported in a conveying air stream (13) with a device having an inlet (3) and a discharge (4), a cleaning roller (1) having a longitudinal axis (5) and having a cleaning roller (1 ) arranged with a housing (2), which is provided with a plurality of guide elements (9) for the spiral deflection of the conveying air flow (13), characterized in that the conveying air flow (13) centrally between the two ends (14, 16 ) of the cleaning roller (1) through a central inlet (3) to the cleaning roller (1) and moved over the grate (6) and that subsequently by the cleaning roller (1) in cooperation with the guide elements (9) leading the fiber flocks Conveying air flow (13) in two subsets (19, 20) is divided, which in the opposite direction (21, 22) to each other, in the direction of the longitudinal axis (5) of the cleaning roller (1) viewed spirally around the cleaning roller (1) to the respective roll end (14, 16) of the cleaning roller (1) are conveyed and that the conveying air flows the respective subset (19, 20) through one, at the respective end (14, 16) of the cleaning roller (1) provided outlet opening (15, 17) are discharged and combined with a transport line (18) to an outlet (4).

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