阅读说明：本技术 环锭纺纱机 (Ring spinning machine ) 是由 S·克拉维茨 于 2019-08-07 设计创作，主要内容包括：本发明涉及一种环锭纺纱机(1),其具有多个在机器纵轴线的两侧并排就位的纺纱位(4),所述纺纱位在牵伸机构组(5)的出口区域内分别配备有多件式的断纱抽吸机构(9),该断纱抽吸机构具有连接至环锭纺纱机(1)的沿机器长度的抽吸通道(12)的保持皮碗(15)、可固定在该保持皮碗(15)内的抽吸管(13)以及安置在该抽吸管(13)上的抽吸接管(11),该抽吸接管借助锁定机构(24；27)能被可更换地固定在该抽吸管(13)上。本发明规定,该抽吸接管(11)具有在安装状态中插入该抽吸管(13)中的内部管状突伸部(21)和在安装状态中嵌套在抽吸管(13)上的外部管状突伸部(22),从而得到间隙密封,并且该锁定机构(24,27)设计成卡口连接(16,25)。(The invention relates to a ring spinning machine (1) having a plurality of spinning stations (4) which are positioned next to one another on both sides of the machine longitudinal axis and which are each equipped in the region of an outlet of a drawing frame set (5) with a multi-part thread breakage suction device (9) having a retaining cup (15) which is connected to a suction channel (12) of the ring spinning machine (1) along the machine length, a suction tube (13) which can be fixed in the retaining cup (15), and a suction connection piece (11) which is arranged on the suction tube (13) and which can be fastened to the suction tube (13) in an exchangeable manner by means of a locking mechanism (24; 27). The invention provides that the suction connection piece (11) has an inner tubular projection (21) which is inserted into the suction tube (13) in the mounted state and an outer tubular projection (22) which is nested on the suction tube (13) in the mounted state, so that a gap seal is obtained, and that the locking mechanism (24,27) is designed as a bayonet connection (16, 25).)

1. A ring spinning machine (1) having a plurality of spinning stations (4) which are located next to one another on both sides of a machine longitudinal axis and which are each equipped with a multi-part thread breakage suction device (9) in the region of an outlet opening of a drawing frame set (5), said suction device having: a retaining cup (15) connected to a suction channel (12) of the ring spinning machine (1) extending along the machine length; a suction pipe (13) which can be fixed in the retaining cup (15); and a suction connection piece (11) which is arranged on the suction tube (13) and can be fastened to the suction tube (13) in an exchangeable manner by means of a locking mechanism (24; 27), characterized in that the suction connection piece (11) has an inner tubular projection (21) which is inserted into the suction tube (13) in the installed state and an outer tubular projection (22) which is nested on the suction tube (13) in the installed state, so that a gap seal is obtained, and in that the locking mechanism (24,27) is designed as a bayonet connection (16, 25).

2. A ring spinning machine according to claim 1, characterized in that the bayonet connection (16,25) comprises a projection (17) provided on the suction tube (13) and a retaining slot (18,26) machined into the suction connection tube (11), preferably into an outer tubular projection (22) of the suction connection tube (11).

3. A ring spinning machine according to claim 1 or 2, characterized in that the locking mechanism (24) is designed as a one-sided bayonet connection (16).

4. A ring spinning machine according to claim 1, characterized in that the bayonet connection (25) comprises a projection (17) arranged on the suction tube (13) and two retaining slots (26) which are arranged opposite one another and are machined into the suction connection piece (11).

5. A ring spinning machine according to claim 4, characterized in that the locking mechanism (27) is designed as a double-sided bayonet connection (16).

6. A ring spinning machine according to any one of the preceding claims, characterised in that the suction connection tubes (11) have different lengths.

7. A ring spinning machine according to any one of the preceding claims, characterised in that the mouths (20) of the suction connection tubes (11) have different net cross-sections.

8. A ring spinning machine according to any one of the preceding claims, characterised in that the suction connection (11) has different colours according to its design.

9. A ring spinning machine according to one of the preceding claims, characterized in that the suction tube (13) and/or the suction connection piece (11) are each produced as a plastic casting.

Technical Field

The invention relates to a ring spinning machine having a plurality of spinning stations located next to one another on both sides of the machine longitudinal axis, which are each equipped with a multi-part thread-breaking suction device in the outlet region of a drawing unit, wherein the thread-breaking suction device has a retaining cup (Haltemanshette) connected to a suction channel of the ring spinning machine along the machine length, a suction tube that can be fastened in the retaining cup, and a suction nozzle that is arranged on the suction tube and can be fastened on the suction tube in a replaceable manner by means of a locking device.

Background

Various embodiments of ring spinning machines equipped with a thread break suction mechanism in the outlet zone of a drawing frame set have been known for a long time in the textile industry and are described in part explicitly in the patent literature.

In german utility model DE8512843U, for example, a ring spinning machine is described which has a drawing unit and, in the region of its numerous spinning positions, respectively has a thread break suction device arranged below the drawing unit. The thread breakage suction device, which is used not only for removing dust and fly-overs, but also during thread breakage, is connected here via a suction channel along the machine length to a filter device, which is preferably arranged in one of the end supports of the ring spinning machine and can be subjected to an air flow load by a negative pressure source, preferably a ventilator.

Ring spinning machines with similarly constructed thread break suction mechanisms are also described in DE102008056518a1 and DE102009036409a 1. In these known ring spinning machines, a plurality of thread break suction devices are also provided on the outlet side of the drawing frame group in the region of a plurality of spinning positions, each thread break suction device being connected to a filter device of the spinning machine via a suction channel.

In addition, the clear width of the suction opening can be varied in the thread suction device, and the suction air requirement of the thread suction device can be optimized thereby.

In addition, a yarn suction mechanism designed in multiple pieces is also described in this patent document.

DE19733614a1, for example, describes a thread suction mechanism which is connected to a suction channel of a ring spinning machine by means of an elastic retaining cup. A suction tube, which acts as a bottom part and is equipped with a suction connection piece on the end side, is inserted into the retaining cup. It is also described in the specification of this patent application that the suction connection piece is fastened to the suction tube in an exchangeable manner by means of a quick-action connection.

The interchangeable attachment of the suction connection piece to the suction tube of the thread suction device by means of a quick-action connection is also described in CN 204342958U. The known quick-action connection is formed by a fastening ring which is fixedly attached to the suction connection piece and a fastening part which is movably mounted on the suction tube. In other words, two elastic positioning brackets are fixed to the suction tube on a ring which is mounted so as to be axially displaceable and is acted upon by a compression spring, said elastic positioning brackets engaging behind a stationary fixing ring of the suction connection piece in the mounted state.

However, snap-action coupling mechanisms require a relatively large force to release the coupling and lose their securing action over time.

Furthermore, DE4012800C2 describes a thread suction device, in which a suction nozzle, referred to as a mouthpiece, is equipped with a thread cutting blade and is fastened on a suction tube in an exchangeable manner, wherein a screw connection is used as fastening means.

As already mentioned, it is also known in connection with thread suction mechanisms that the mouth of the exchangeable suction attachment can be designed differently. The mouth of the suction nozzle can have different embodiments in terms of its clear cross section, as described in DE102007027272a1, for example. The mouth can be designed, for example, as a slot, a circle, an ellipse, a polygon, etc.

Although the aforementioned thread suction devices have proven themselves in practice, they have the disadvantage that, in particular, the devices for the exchangeable fastening of the suction connection piece to the suction tube are relatively complex and cost-intensive to produce. In view of the large batch yarn suction mechanism required for each ring spinning machine, the improvement appears to be entirely feasible.

Disclosure of Invention

Starting from the prior art described above, the invention is therefore based on the object of further developing a thread suction mechanism of a ring spinning machine, in particular having a suction tube and a suction connection piece that is fastened to the suction tube in a replaceable manner, in such a way that a simpler and therefore cheaper production of such a thread suction mechanism is possible.

According to the invention, this object is achieved in that the suction connection piece has an inner tubular projection which is inserted into the suction tube in the mounted state and an outer tubular projection which nests in the suction tube in the mounted state, so that a gap seal is obtained, and in that the locking mechanism is designed as a bayonet connection.

The thread suction device design according to the invention has the advantage, in particular, that the exchangeable suction connection piece can be mounted on the suction tube relatively easily and quickly, wherein it is ensured that the mounted components are held in place in a predetermined position as intended throughout the mounting. That is, the bayonet connection ensures that the suction connection of the thread suction device, which is arranged in the region of the thread path, is always positioned as intended. The locking takes place by means of an insertion-rotation with a bayonet connection. To lock the bayonet connection, the suction connection piece is inserted onto the suction tube and rotated. For the release, the suction connection piece is simply rotated in the opposite direction.

In addition, the tubular projection of the suction connection forms an air-tight connection in the installed state in connection with the suction tube, so that unnecessary pressure losses in the region of the yarn suction mechanism are substantially avoided during the spinning operation, which has a positive effect on the energy consumption of the yarn suction mechanism and thus of the ring spinning machine as a whole. The sealing action of the gap seal is based on the lengthening of the flow path through the gap to be sealed, whereby the flow resistance is significantly increased.

In a further advantageous embodiment, it is provided that the bayonet connection comprises a projection which is arranged on the suction tube and a bent-over retaining slot which is formed into the suction connection piece. The holding slot is then preferably machined into the outer tubular projection of the suction attachment. For this purpose, the tubular projection is used not only for sealing but also for locking. Such a locking mechanism forms a quick-to-establish and releasable coupling of the two cylindrical members. The suction tube and the suction connection piece can now be connected by a plug-and-turn connection, i.e. the components are securely coupled by a plug-in connection and a subsequent counter-rotation. If necessary, these components can also be easily separated from one another by corresponding swiveling and unlatching.

In an advantageous embodiment, it is provided that the locking mechanism is designed as a one-sided bayonet connection.

In the case of a one-sided bayonet connection, the installation position of the suction attachment on the suction tube is precisely set by the positioning of the projections on the suction tube together with the corresponding arrangement of the retaining slots on the suction attachment. In this case, the suction connection can be mounted in a simple manner in the region of the one-sided bayonet connection, so that the suction connection can be mounted in a simple manner.

In an alternative embodiment, however, it can also be provided that the suction tube has a projection, as is known, and that the suction connection is equipped with two opposing retaining slots. The locking mechanism thus formed is then used when, for example, as in the compact spinning method, both a left-hand and a right-hand mounting position of the suction connection tube is required on the ring spinning machine.

In the embodiment of the suction connection piece designed for compact spinning, which usually has a lateral screen in its mouth region, the suction connection piece can be mounted on the suction tube selectively in different mounting positions, for example in the left-hand or right-hand mounting position, by means of two holding slots lying opposite one another.

In addition, the suction connection piece can have different lengths and/or the mouth of the suction connection piece has different clear cross sections.

The use of suction nozzles having different lengths, for example, makes it possible for the mouth of the suction nozzle to be optimally positioned in the region of the travel path of the yarn to be produced, in relation to the fibrous material to be processed. In the case of relatively weak thread materials, a relatively long suction nozzle is generally used, the mouth of which is arranged close to the region of the path of travel of the emerging thread, with the result that, because of the high suction air flow, not only is good dust removal ensured, but also, if required, an orderly accommodation of the separated thread is ensured.

When the thread material is thin or rather delicate and there is thus a risk that the suction air flow present in the region of the suction nozzle mouth would adversely affect the thread path, a comparatively short suction nozzle is correspondingly used.

Furthermore, by means of the inner cross section of the mouth of the suction nozzle, it is achieved in a relatively simple manner that the intensity of the suction air flow adjacent to the mouth of the suction nozzle is adapted to the flow conditions prevailing in the suction channel of the ring spinning machine along the machine strength. That is, because of the severe frictional losses of the negative pressure flow in the suction channel along the length of the machine, different pressure conditions exist in the suction channel.

In the suction channel region close to the negative pressure source, for example, a relatively high negative pressure is generally present, while the negative pressure on the end side of the suction channel is generally much lower.

It is accordingly advantageous if the mouth of the suction connection provided at the end face of the suction channel has a larger clear cross section than the suction connection situated close to the negative pressure source.

In an advantageous embodiment, the suction connection piece also has different colors depending on its respective design. With such a color marking of the different suction nozzles, the use of a particular suction nozzle is much simpler for the operator, since the operator can easily recognize the incorrect suction nozzle by the color of the suction nozzle when it is inadvertently installed.

The suction pipe and/or the suction connection piece are preferably produced in each case as a plastic casting. It is known that such large numbers of parts can be produced inexpensively as plastic castings, and this production method ensures that the different suction connection pieces of an embodiment are always identical despite the large number of parts.

Drawings

The invention will be described in detail hereinafter with reference to an embodiment shown in the drawings, in which:

figure 1 shows a schematic front view of a ring spinning machine with a yarn suction mechanism arranged below a drawing frame set,

figure 2 shows a schematic side view of a yarn suction device according to the invention arranged below a drawing frame group,

fig. 3 shows a slight perspective view and a sectional view of the thread suction mechanism, with a suction connection piece connected to the suction tube via a gap seal,

fig. 4 shows a thread suction mechanism, wherein the suction connection piece is fastened to the suction tube by means of a single-sided bayonet connection,

fig. 5 shows a thread suction mechanism, which has a suction connection tube with a triangular mouth,

fig. 6 shows a thread suction mechanism with a suction connection piece, which has a one-sided retaining wall and is fastened to a suction tube by means of a two-sided bayonet connection.

List of reference numerals

1 ring spinning machine;

2 an end frame;

3 an end frame;

4 spinning positions;

5, a drafting mechanism group;

6, inputting a roller pair;

7 intermediate roller pairs;

8, outputting a roller pair;

9a yarn suction mechanism;

10 mouth parts;

11 a suction connection tube;

12 a suction channel;

13 a suction tube;

14 yarns;

15 keeping the leather cup;

16, bayonet connection;

17, a bulge;

18 holding the seam;

19 an axial portion;

20 a right angle portion;

21 an inner protruding portion;

22 an outer projection;

23 a wall portion;

24 a locking mechanism;

25, bayonet connection;

26 holding the seam;

27 a locking mechanism;

28 a lateral shield;

29 a drafting mechanism;

30 fiber strips.

Detailed Description

Fig. 1 shows a schematic front view of a ring spinning machine 1. As is known, such a ring spinning machine 1 has a plurality of spinning positions 4, for example, more than one thousand spinning positions 4, between the end frames 2, 3. Half of the spinning places 4 are arranged here as shown in fig. 1 in the front region of the ring spinning machine 1, and the other half of the spinning places 4 are in place in the machine rear region of the textile machine.

As also shown in fig. 1, such a ring spinning machine 1 is generally equipped with a drawing mechanism group 5 and a yarn suction mechanism 9. That is to say, the drafting mechanism is arranged on both machine longitudinal sides and is composed of drivable roller arrays 6, 7, 8 along the machine length and upper rollers 6 ', 7 ', 8 ' mounted in the drafting mechanism holder and rotatable by means of friction. A yarn suction mechanism 9 is installed below the pair of delivery rollers 8, 8' of the draft mechanism group 5.

As can be seen, the plurality of yarn suction means 9 are connected to a suction channel 12 along the length of the machine which can be subjected to a negative pressure, either to the own filtering device 28 of the machine provided in the terminal frame 3 of the ring spinning machine 1, as shown in the figures, or to the air-conditioning equipment of the spinning workshop, for example, through at least one connection channel, which is subjected to the action of an air flow, for example, by means of the suction means.

Fig. 2 shows a drawing frame 29 of the drawing frame assembly, which is schematically illustrated in fig. 1 and is designated as a whole by reference numeral 5, in a side view, in the region of a spinning position 4. As is known, fiber slivers 30 in the form of roving cop are typically drawn in such a drawing frame 29 to the fiber strength required for the desired yarn 14.

According to the illustrated embodiment, the draft mechanism 29 is provided with three draft mechanism roller pairs: an input roller pair 6, 6 ', an intermediate roller pair 7, 7 ' and an output roller pair 8, 8 '. Connected to the delivery roller pair 8, 8', a thread suction device 9 constructed according to the invention is provided.

This means that the thread suction device 9 has a suction socket 11 which is exchangeably arranged on a suction tube 13 which is in turn connected via a retaining cup 15 to a suction channel 12 along the length of the machine. That is, the thread suction device 9 is arranged such that the mouth 10 of the suction nozzle 11 is positioned in the vicinity of the path of movement of the emerging thread 14.

As shown in the thread suction device 9 shown in the sectional view in fig. 3, the suction connection piece 11 has two tubular wall projections 21, 22 at its end opposite the mouth 10, which in the installed state correspond to the end-side wall 23 of the suction tube 13. That is, in the mounted state, the relatively long inner-wall projection 21 of the suction connection piece 11 is inserted into the wall 23 of the suction tube 13, while the slightly shorter outer-wall projection 22 of the suction connection piece 11 is nested on the wall 23 of the suction tube 13.

Since not only the outer diameter of the inner wall projection 21 of the suction connection piece 11 is matched to the inner diameter of the wall 23 of the suction tube 13, but also the inner diameter of the outer wall projection 22 of the suction connection piece 11 is matched to the outer diameter of the wall 23 of the suction tube 13, a good gap seal between the components 11, 13 occurs in the installed state.

Fig. 4 shows a possible embodiment of the thread suction device 9, in particular an advantageous design of the locking device 24 of the suction tube 13 and the suction connection piece 11. The locking mechanism 24 is designed here as a so-called one-sided bayonet connection 16. That is, the suction tube 13 is provided with a stop in the form of a projection 17, which in the installed state of the suction nozzle 11 corresponds to a retaining slot 18 in the suction nozzle 11. The retaining slot 18 has a short axial section 19, to which a slightly longer section 20 is connected perpendicularly.

In order to obtain a defined secure fastening of the suction connection piece 11 to the suction tube 13, the suction connection piece 11 must first be positioned on the suction tube 13 such that its axial section 19 holding the slot 18 is in front of the projection 17 of the suction tube 13.

Subsequently, the suction connection piece 11 is moved in the axial direction, so that the projection 17 of the suction tube 13 slides into the axial section 19 of the retaining slot 18. Subsequently, the suction connection piece 11 is slightly rotated, with the result that the projection 17 of the suction tube 13 is moved into the right-angled connecting section 20 of the retaining slot 18. In this state, the suction connection piece 11 is fixed to the suction tube 13 in a predetermined installation position. That is, the arrangement of the projection 17 on the suction tube 13 and the corresponding arrangement of the retaining slot 18 in the suction nozzle 11 ensures that the components 11, 13 always have a precise, defined, settable installation position.

Such a precise and settable installation position is important in particular when the shape of the mouth 20 of the suction attachment 11 is asymmetrical as shown in fig. 5. Fig. 5 shows an embodiment in which the mouth 20 of the suction nozzle 11 is triangular. In such a design, it can be ensured by using a one-sided bayonet connection 16 that the mouth 20 of the suction attachment 11 is always positioned in a predetermined position.

Fig. 6 shows the thread suction device 9, wherein the suction connection piece 11 is equipped with an alternative embodiment of a locking device. That is, the suction connection piece 11 has a locking mechanism 27, which is designed as a so-called double-sided bayonet connection 25. Such a locking mechanism 27 has advantages when the ring spinning machine 1 should operate in a compact spinning method.

In the compact spinning process, a suction nozzle 11, which is equipped with a lateral shield 28, is usually used on the thread suction device 9. Since the lateral shield 28 is preferably mounted on the replacement side on the right or left side of the mouth 20 of the suction nozzle 11 in the mounted state of the suction nozzle 11, it is advantageous if the locking mechanism 27 is designed as a double-sided bayonet connection 25 as shown. In other words, the suction tube 13 is provided, as is usual, with a stop in the form of a projection 17, which in the installed state of the suction nozzle 11 corresponds to one of the two retaining slots 26 of the suction nozzle 11.

Holding slots 26 are machined into the suction connection piece 11 on opposite sides, each having, as is known, a short axial section 19 to which a slightly longer section 20 is connected perpendicularly. In the case of a double-sided bayonet connection 25, in order to obtain a defined secure fixing of the suction connection piece 11 on the suction tube 13, it is also necessary to initially position the suction connection piece 11 on the suction tube 13 such that the axial portion 19 of one of the retaining slots 26 or the axial portion 19 of the other retaining slot 26 is arranged in front of the projection 17 of the suction tube 13, depending on the desired installation position. Subsequently, the suction connection piece 11 is moved in the axial direction, so that the projection 17 of the suction tube 13 slides into the axial section 19 of the associated retaining slot 26. Subsequently, the suction connection piece 11 is slightly rotated, with the result that the projection 17 of the suction tube 13 moves into the right-angled connecting section 20 of the retaining slot 26.

In this state, the suction connection piece 11 is fixed to the suction tube 13 in the desired installation position as intended. That is to say, the suction connection piece 11 can be positioned on the suction tube 13 selectively in two precisely set installation positions by means of the double-sided bayonet connection 25.