CN110997993A

CN110997993A - Multi-nozzle connection for a textile machine, textile machine and method for operating a textile machine

Info

Publication number: CN110997993A
Application number: CN201880054162.XA
Authority: CN
Inventors: H.卡佩勒; M.法纳
Original assignee: Maschinenfabrik Rieter AG
Current assignee: Maschinenfabrik Rieter AG
Priority date: 2017-08-17
Filing date: 2018-07-20
Publication date: 2020-04-10
Also published as: EP3669021B1; EP3669021A1; WO2019034946A1; US20210156052A1; JP2020531701A; CH714068A1

Abstract

The invention relates to a multi-nozzle connection (29) of a textile machine, in particular of a ring spinning machine, for alternately connecting a compression device (46 b) or a suction tube device (46 a) to a suction line of the textile machine, and to a textile machine equipped with such a multi-nozzle connection (29).

Description

Multi-nozzle connection for a textile machine, textile machine and method for operating a textile machine

Technical Field

The present invention relates to a multi-nozzle connection of a suction line of a textile machine according to the independent claims and to a textile machine equipped with such a multi-nozzle connection.

Background

Various embodiments are known from practice, in which a compression device is arranged after the compression (compression) of the fibrous material (fiber strand) output by the drawing frame unit. Following this compression device, the compressed fiber material is fed to a vortex generating device after passing through the clamping point. Such vortex generators are, for example, in ring spinning machines, composed of a rotor which is wound around a ring, wherein the yarn produced is wound onto a rotating sleeve. As compression means, use is made primarily of a suction-operated circulating, perforated suction drum or a circulating belt provided with perforations. In this case, a special suction region is defined on the compression element inside the suction drum or inside the revolving belt, using corresponding inserts. Such an insert can be provided, for example, with a correspondingly shaped suction gap to which a negative pressure is applied, as a result of which a corresponding air flow is generated at the periphery of the respective compression element. The projecting fibers are bundled together in particular in the yarn by an air flow which is directed substantially transversely to the conveying direction of the fiber material.

In known solutions, the fiber material output by the drawing frame unit is guided above or below the compression device used. In particular for use on ring spinning machines, additional clamping points are required after the suction zone in order to achieve a vortex break (dralspherrung).

Such devices are shown and described, for example, in publications EP947614B1, DE102005010903a1, DE19846268C2, EP1612309B1, DE10018480a1 or CN 1712588A. The above-mentioned publications relate essentially to compression devices which are fixedly mounted next to the respective drafting unit. The drive of the compression device is realized in part by a special drive shaft arranged over the length of the spinning machine, which is in driving connection either with the suction roller or with a revolving belt, or by a fixedly mounted driving connection with a correspondingly arranged pressure roller of the compression device.

In practice, it is necessary to add existing spinning machines to conventional drafting mechanism units with such compression devices in order to ensure the possibility of producing high-quality yarns also in these machines. Therefore, devices have been proposed with which conventional drafting systems can be equipped with such compression devices. Such a case is known, for example, from DE10227463C1, in which the ram of the drafting unit is extended in order to support an additional drive roller. A drive roller extending over the entire length of the spinning machine is provided for driving the added compression device. This additional installation and mounting is time-consuming and inflexible, i.e. requires a very high time consumption when it is to be exchanged in the desired manner back to a conventional drawing frame without a compression device.

In published DE10050089a1, an embodiment with a compression device is shown, which is provided for subsequent mounting on a conventional drafting mechanism device.

From CN2851298Y, a device is known in which a compression roller with a rotating shut-off roller is accommodated in a support element which is connected by a plate via a screw to a pivotable load arm of a drafting mechanism device. In the assembled and locked position, the drive is transmitted by friction from an output roll directly connected to the drive and the associated pressure roll to the compression roll and the rotary shut-off roll. The compression device shown here is likewise provided for subsequent mounting on an existing drafting mechanism device of a spinning machine without a compression mechanism. The installation of the compression unit shown here on the existing drafting unit by screwing and the threading on the axis of the pressure roller are time-consuming and require additional calibration of the spacing. Additionally, a connection to a negative pressure source must also be established separately.

In the above-described embodiments, the suction element assigned to the defined compression region for compacting the fibrous material is subjected to an underpressure via an additionally arranged line connected to an underpressure source.

In order to simplify such a compression device, in which a simple and quick mounting on a conventional drafting unit is possible without additional drive elements having to be provided, an embodiment is proposed in WO2012068692a1, in which a compression element in the form of a suction drum and a clamping roller are mounted on a carrier element in a rotationally movable manner. The support element is detachably fixed to the spinning machine by means of a fixing device. In order to establish a drive connection between the drawing frame rollers and the detachably mounted compression device, the compression device is pivoted about a pivot axis by means of a support element in the direction of the output roller pair of the drawing frame, wherein a friction wheel which is coaxially fixed on the respective suction drum and a lower roller of the output roller pair of the drawing frame, respectively, establish a friction-fit connection (by friction). The compression device is held in this drive connection by a correspondingly arranged spring element (for example on the load arm of the drawing frame). In order to design the drive of the compression device more flexibly, WO2012068692a1 further proposes that a second gear stage be provided between the drive element and the compression element of the first gear stage.

However, a disadvantage of this embodiment is that the retrofitting of the textile machine from the compression device to a conventional yarn suction device is relatively expensive and time-consuming.

Disclosure of Invention

The object of the present invention is to simplify and improve the compression device known from WO2012068692a1 for two drawing frame units arranged next to one another, in order to allow simple retrofitting from the compression device to a conventional yarn suction device.

In particular, the object is achieved by a multinozzle connection of a textile machine, in particular of a ring spinning machine, comprising a connection stub for alternately connecting a compression device or a suction tube device to a suction line of the textile machine, wherein the connection stub has three connections and at least one connection is closed off depending on the connected compression device or suction tube device.

The connecting socket can advantageously have three connections arranged next to one another, wherein the compression device can be connected to the central connection, wherein the lateral connections are closed, and wherein the suction line device can be connected to the lateral connections and the central connection is closed.

Embodiments according to the invention are advantageous in that a simple retrofitting of the machine can be achieved. Furthermore, advantageously, spacers and seals may be present between the connecting stub and the compression device or suction device, which allow orienting and sealing the compression device or suction device.

The compression device or the suction tube device is held releasably and pivotably about an axis by a holder of the multi-nozzle connection.

The holder can be formed by two spaced-apart holding elements, wherein the compression device has two lateral projections and the suction tube device has a circular connecting element for connecting to the spaced-apart holding elements. This may relate to a clamping connection. By means of the two latching noses in connection with the opening in the retaining element, the suction device can assume two positions, wherein in the upper position the suction tube is oriented at right angles to the suction channel or in alignment with the multi-nozzle connection and in the lower position the suction tube is inclined downwards compared to the upper position. The holding element can advantageously be fixed to a holding contour (gateprofile) of the textile machine.

This object is also achieved by a textile machine, in particular a ring spinning machine, which is characterized in that it has a multi-nozzle connection according to the invention.

Advantageously, a compression device can be connected to the multi-nozzle fitting, which comprises the following features

Two suction drums, wherein the suction drums can each be assigned to an output roller pair of a drafting mechanism unit of the textile machine, wherein the output roller pair is formed by a lower output roller and an upper output roller;

wherein the suction drum is rotatably supported with bearings on a shaft fixed on a carrier element;

wherein a suction channel extends in the carrier element,

wherein the suction drums each have a drive element which, in the operating position, is in driving connection with the output lower roller and

wherein on the carrier element two clamping rollers are rotatably supported centrally on a common axis in a bearing, wherein, in order to form a clamping line, each of the clamping rollers rests under spring load on an outer circumference of one of the two suction drums,

wherein the suction rollers are respectively matched with the output roller pairs of the drafting mechanism unit,

in which two clamping rollers are rotatably supported centrally on a common axis and are supported on the carrier element

Wherein each of the clamping rollers rests under spring load on the outer circumference of one of the two suction drums in order to form a clamping line.

Advantageously, the suction means can be connected alternately to the multi-nozzle joint, which comprises the following features: two spaced apart suction ducts interconnected by at least one connecting element; and a central plate, the central joint of the connecting nipple being closable by the central plate. Advantageously, the compression device or the suction tube device is further held in a releasable and pivotable manner about an axis by a holder of the multi-nozzle connection, wherein the holder is composed of two spaced-apart elements and can be fixed to the holding contour, wherein the suction tube device can assume two different positions.

The invention also relates to a method for releasably fastening a compression device or a suction tube device to a multinozzle connection of a ring spinning machine.

Further advantages of the invention are apparent from the exemplary embodiments described and illustrated below.

Drawings

The invention is further elucidated by means of the accompanying drawings, in which:

FIG. 1 shows a schematic side view of a spinning station (Spinnteller) of a ring spinning machine;

figure 2 shows a multi-nozzle fitting according to the invention with a suction tube arrangement connected;

FIG. 3 shows a multi-nozzle fitting according to the present invention with a compression device attached; and is

Figure 4 shows a section through the multi-nozzle joint with attached suction device according to line a-a in figure 2;

only the features important to the present invention are shown. Like reference symbols in the various drawings indicate like features.

Detailed Description

Fig. 1 shows a schematic side view of a spinning station 1 of a spinning machine (ring spinning machine) having a drawing frame unit 2, which is provided with a pair of

feed rollers

3, 4, a pair of

intermediate rollers

5, 6 and a pair of

delivery rollers

7, 8.

Belts

12, 13 are guided around the

intermediate rollers

5, 6, respectively, and are held in their illustrated positions around holders, not shown in detail. The

upper rollers

4, 6, 8 of the roller pairs mentioned are embodied as pressure rollers which are mounted on a pivotably mounted pressure arm 10 in a rotationally movable manner via

axes

4a, 6a, 8 a. Two adjacent drafting assemblies 2 (double drafting assemblies) are assigned to a press arm 10. The pressure arm 10 is supported so as to be pivotable about an axis 15 and, as is schematically illustrated, is loaded by a spring element 9. The spring element can also be an air hose, for example. The

rollers

4, 6, 8 are pressed against the

lower rollers

3, 5 and 7 of the roller pairs by a schematically shown spring load. The roller pairs 3, 5, 7 are driven by a drive device, not shown. Here, a single drive can be used, but also other drive forms (gears, toothed belts, etc.) can be used. By means of the driven

lower rollers

3, 5, 7, the

pressure rollers

4, 6, 8 or the belt 13 are driven by friction via the belt 12. The peripheral speed of the driven roller 5 is slightly higher than the peripheral speed of the driven roller 3, so that the fibre material 11 in the form of roving (Lunte) fed to the drafting mechanism unit 2 is subjected to pretension between the pair of

input rollers

3, 4 and the pair of

intermediate rollers

5, 6. The main drawing of the fibrous material 11 takes place between the

intermediate roller pair

5, 6 and the

delivery roller pair

7, 8, wherein the delivery roller 7 has a substantially higher circumferential speed than the intermediate roller 5.

The drafted fibrous material 11 discharged by the respective

discharge roller pair

7, 8 is deflected downward and reaches the region of the suction zone 16 of the following suction drum 17, which is part of the compression device 46b according to the invention. The respective suction drum 17 is provided with perforations or openings 39 extending over its circumference. Next to the suction zone 16, a clamping roller 18 is provided for each of the suction cylinders 17, which clamping roller rests on the respective suction cylinder 17 by means of a pressure load and forms a clamping line therewith. The respective clamping roller 18 is rotatably mounted on an axis 19, which is held in a guide slot 20 of a U-shaped receptacle of a pressure arm 21. The axis 19 is mounted so as to be movable transversely to its longitudinal axis within the guide slot 20. The tappet, which is placed on the outer circumference of the axis 19 and is acted upon by a schematically illustrated compression spring 22, projects through an opening of a compression arm 21 into the guide slot 20. The opening is arranged approximately centrally at the end of the guide slot 20 and opens into a substantially closed cavity of the pressure arm 21, in which cavity the pressure spring 22 is arranged. The compression spring is supported at the closed end of the cavity and rests with the opposite end against the head of the tappet.

The pressure arm 21 is pivotably supported in the bearing element about an axis arranged at its end. In this pivot position, the axis is held at the end of the respective guide transversely to its pivot axis by a stop edge, which is schematically illustrated in fig. 1. The clamping roller 18, which is rotatably mounted on the pressure arm 21, is then acted upon by the force of the pressure spring 22 toward the respective suction drum 17, wherein a clamping line is produced. The press arm 21 pivots past the dead point until it rests against a stop. In this position, the axis 19 of the clamping roller 18 lies below a plane extending through the pivot axis and the center axis of the suction drum 17, i.e. the clamping roller 33 remains in this position above the dead point. Further details regarding the arrangement and design of the pinch rollers 18 can be taken from CH 705308.

Subsequently, the pressure lever 10 is pivoted about its pivot axis 15 from the upper position shown in dashed lines into a lower position in which pressure is exerted on the compression device 46b in the direction of the roller 7 by means of the leaf spring 24 fixed to the pressure lever 10 by means of the bolt 23 and the web 25 fixed to the leaf spring. The suction drum 17 connected thereto is driven by the roller 7 by friction by means of a drive element 40, which is described further below.

In this "operating position", the fibrous material 11 drawn and delivered by the drawing frame 2 is fed to the next suction zone 16 of the respective suction drum 17 and is compressed in a known manner under the influence of the generated suction air flow. Deflection screens arranged at a distance from one another can also be arranged above the suction region 16, as is shown and described, for example, in DE 4426249. The process of compressing fibrous materials is also described in this publication.

In order to generate the required vacuum in the region of the suction region 16, a vacuum source 26 is provided, which is connected to a central suction channel 27. The suction channel 27 is connected via a line 28 and a flexible multi-nozzle connection 29 to the respective end of the suction channel 31 of the compression device 46b which projects in the direction of the suction channel 27. By the flexibility of the multi-nozzle joint 29, the compression device 46b can pivot about one axis. For this purpose, the compression device 46b has two lateral projections 30 which engage into the holder described with reference to fig. 2. The schematically illustrated multi-nozzle connection 29 can be designed such that it connects to the formed suction channel 31 in a form-fitting and outwardly sealing manner when the two half-shells are joined together. The construction and assembly of half-shells in such a carrier element is known from WO2012068692a 1. Advantageously, the spinning machine can be equipped with a compression device 46 b. The structure, operation and advantages of the multi-nozzle joint 29 according to the present invention are illustrated in detail in fig. 2.

The nip line produced by the nip rollers 18 simultaneously forms a so-called "spin-stop gap" by which the fibrous material 11 is conveyed in the conveying direction in the form of a compacted yarn 32, while being separated in rotation, to a schematically illustrated annular spinning device. The ring spinning device is provided with a ring 33 and a rotor 34, wherein the yarn is wound onto a sleeve 35 to form a coil (Spule) 36 (cop). A yarn guide 37 is arranged between the clamping line and the rotor 34. The ring 33 is fixed to an annular frame 38 which moves up and down during the spinning process.

Fig. 2 and 3 show a multi-nozzle joint 29 according to the invention. The multinozzle connection serves for the alternating connection of the compression device 46b, as explained in fig. 1 in connection with a ring spinning machine, or for connecting the suction tube device 46a to the suction channel 27 of a ring spinning machine.

Fig. 2 shows a multi-nozzle connection 29 according to the invention with a suction conduit arrangement 46a connected to the suction channel 27 of the ring spinning machine. The suction device 46a is formed by two suction pipes 47 arranged next to one another, which are connected by a central circular connecting element 50. The second connection between the two suction pipes 47 is located on the front end of the suction pipe arrangement 46 a. The universal multi-nozzle connection 29 has a connection stub 42 with three connections 43 arranged next to one another, which are used depending on the device to be connected. An adapter or spacer 44, which can be connected to the connection piece 43 of the connection piece 42, and a seal 45 are located between the connection piece 43 and the compression or suction tube device 46 a. The compression device 46b can be connected to the central connection 43, wherein the lateral connections 43 are closed. The suction line device 46a can be connected to the lateral connection 43, the central connection 43 being closed by a plate 48.

The compression device 46b (fig. 1, 3) or the suction tube device 46a (fig. 2) is releasably held by the holder of the multi-nozzle connection 29. In the embodiment shown, the bracket is formed by two spaced apart retaining elements 49. The suction tube arrangement 46a engages with a circular connecting element 50 into the spaced-apart retaining elements 49, wherein a releasable connection, for example a clamping connection, is provided. The holding element 49 is fixed on a holding contour 51 of the textile machine and at the same time fixes the holding adapter or spacer 44.

Fig. 3 shows a multinozzle connection 29 according to the invention with a connected compression device 46b, as is explained in fig. 1 in connection with a ring spinning machine. The generic multi-nozzle connection 29 corresponds to the design of fig. 2, with three connecting pieces 42 having three connections 43 arranged next to one another. An adapter or spacer 44 and a seal 45 are located between the connection 43 and the compression or suction tube device 46a, said adapter or spacer 44 being connectable with the connection 43 of the connection nipple 42. For fixing purposes, the compression device 46b has two lateral projections 30 which engage into two elements 49 of the bracket. The compression device 46b can be connected to the central joint 43, the lateral joints 43 being closed by plates 48.

Fig. 4 shows a section a-a through the multi-nozzle joint 29 with the attached suction device according to fig. 2. The compression device 46b and the suction tube device 46a can be pivoted about the axis mentioned and can therefore be releasably fixed to the connection piece 42 by a rotational or tilting movement. The suction device 46a can assume two positions by means of two latching noses 52, wherein in the upper position the suction pipe 47 is oriented at right angles to the suction channel or in alignment with the multi-nozzle connection, and in the lower position the suction pipe 47 is slightly inclined downwards compared to the upper position (not shown).

Embodiments according to the invention are advantageous in that the machine can be simply retrofitted. The invention also relates to a method for releasably fastening a compression device 46b or a suction tube device 46a to a multi-nozzle connection 29 of a textile machine, in particular of a ring spinning machine.

List of reference numerals

1 spinning station

2 drafting mechanism unit

3 input lower roller

4 input upper roller

4a axis

5 intermediate lower roller

6 middle upper roll

6a axis

7 output lower roller

7a axis

8 output upper roll

8a axis

9 spring element

10 pressure arm

11 roving

12 leather belt

13 leather belt

14 suction zone

15 axis

16 suction zone

17 suction drum

18 pinch roll

19 axes of pinch rollers 18

20 guide slot/support

21 pressure arm

22 pressure spring

23 bolt

24 plate spring

25 contact piece

26 negative pressure source

27 suction channel

28 pipeline

29 coupling element

30 projection

31 suction channel

32 yarn

33 Ring

34 annular rotor

35 cop

36 coil

37 yarn guide

38 ring frame

39 opening

40 friction wheel and driving wheel

41 bearing element

42 connecting pipe

43 joint

44 spacer

45 sealing element

46a suction tube device

46b compression device

47 suction pipe

48 plate

49 holding element

50 circular connecting element

51 retention profile

52 latch the nose.

Claims

1. A multi-nozzle connection (29) which can be connected to a suction channel (27) of a textile machine, in particular of a ring spinning machine, comprises a connection stub (42) for alternately connecting a compression device (46 b) or a suction tube device (46 a) having at least one suction tube (47) to the suction channel (27) of the textile machine, wherein the connection stub (42) has three connections (43) and at least one connection (43) is closed off as a function of the connected compression device (46 b) or suction tube device (46 a).

2. Multinozzle junction (29) according to claim 1, characterized in that the connection stub (42) has three junctions (43) arranged side by side, wherein the compression device (46 b) can be connected with an intermediate junction (43), wherein lateral junctions (43) are closed, and wherein the suction tube device (46 a) has two suction tubes (47) and can be connected with the lateral junctions (43), and the intermediate junction (43) is closed.

3. Multiple nozzle joint (29) according to any one of claims 1 or 2, wherein said suction duct means (46 a) can occupy two different positions, wherein in a first position one or more suction ducts (47) are oriented in line with said multiple nozzle joint and in a second position one or more suction ducts (47) are inclined downwards compared to an upper position.

4. The multi-nozzle joint (29) according to any one of claims 1 to 3, characterized in that a spacer (44) and a seal (45) are present between the connection nipple (42) and the compression device (46 b) or the suction device (46 a).

5. The multi-nozzle joint (29) according to any one of claims 1 to 4, characterized in that the compression device (46 b) and the suction tube device (46 a) are releasably and pivotably held about an axis by a bracket of the multi-nozzle joint (29), which bracket is composed of two spaced-apart holding elements (49), wherein the compression device (46 b) has two lateral projections (30) and the suction tube device (46 a) has a central connecting element (50) for releasable connection with the spaced-apart holding elements (49).

6. Multinozzle joint (29) according to the preceding claim, characterized in that the retaining element (49) can be fixed on a retaining profile (51) of the textile machine.

7. Textile machine, in particular a ring spinning machine, characterized in that it has a multi-nozzle fitting (29) according to any one of the preceding claims for alternately connecting a compression device (46 b) or a suction tube device (46 a) comprising at least one suction tube (47) to a suction channel (27) of the textile machine.

8. Textile machine according to the preceding claim, wherein the multi-nozzle connection (29) has three connections (43) arranged side by side, wherein the compression device (46 b) can be connected to a central connection (43), wherein the lateral connections (43) are closed, and wherein a suction tube device (46 a) has two suction tubes (47) and can be connected to the lateral connections (43), and wherein the central connection (43) is closed.

9. Textile machine according to any one of the preceding claims, wherein a compression device (46 b) can be connected to the connecting stub (42), comprising

Two suction drums (17), wherein the suction drums (17) can each be assigned to a pair of output rollers (7, 8) of a drafting mechanism unit (2) of the textile machine, wherein the pair of output rollers (7, 8) is formed by a lower output roller (7) and an upper output roller (8);

wherein the suction drum (17) is rotatably supported by means of bearings on a shaft fixed on a carrier element (41);

wherein a suction channel (31) extends in the carrier element (41),

wherein the suction rollers (17) each have a drive element (40) which, in an operating position, is in driving connection with the output roller (7) and is provided with a drive element

Wherein two clamping rollers (18) are rotatably mounted centrally on a common axis (19) in the bearing (20) on the carrier element (41), wherein each of the clamping rollers (18) rests under spring load on an outer circumference of one of the two suction drums (17) in each case in order to form a clamping line,

wherein the suction rollers (17) are respectively assigned to a pair of delivery rollers (7, 8) of the drafting mechanism unit (2),

wherein two clamping rollers (18) are rotatably supported centrally on a common axis (19) on the support element (42) and

wherein each of the clamping rollers (18) rests under spring load against the outer circumference of one of the two suction drums (17) in order to form a clamping line.

10. Textile machine according to any one of the preceding claims, wherein a suction tube device (46 a) can be connected to the connecting stub (42), comprising

Two spaced-apart suction pipes (47) which are connected to one another by means of at least one connecting element (50); and

a central plate (48) with which the intermediate connection (43) of the connecting stub (42) can be closed.

11. Textile machine according to any one of the preceding claims, characterized in that the compression device and the suction tube device (46 a) are releasably held on the multi-nozzle joint (29) by a holder with two holding elements (49).

12. Textile machine according to the preceding claim, wherein a compression device (46 b) or the suction tube device (46 a) is releasably held by the holder, wherein the compression device (46 b) has two lateral projections (30) and the suction tube device (46 a) has a central connecting element (50) for connecting with the spaced-apart holding elements (49).

13. Textile machine according to any of claims 11 or 12, characterized in that the compression device (46 b) and the suction tube device (46 a) are held releasably and pivotably about an axis by a bracket of the multi-nozzle joint (29), which bracket is formed by two spaced-apart holding elements (49) and can be fixed on a holding contour (51), wherein the suction tube device (46 a) can assume two different positions.

14. Textile machine according to any one of the preceding claims, characterized in that a spacer (44) and a seal (45) are present between the compression device (46 b) or the suction tube device (46 a) and the connecting stub (42).

15. A method for operating a textile machine, in particular a ring spinning machine, characterized in that the textile machine has a multi-nozzle nipple (29) according to one of the preceding claims for alternately connecting a compression device (46 b) or a suction tube device (46 a) to a suction channel (27) of the textile machine, comprising the method step of releasably fixing the compression device or suction tube device (46 a) to the multi-nozzle nipple (29).