CN111285183A

CN111285183A - Air extraction system

Info

Publication number: CN111285183A
Application number: CN201911256064.7A
Authority: CN
Inventors: T·福歇
Original assignee: Saurer Spinning Solutions & CoKg GmbH
Current assignee: Saurer Spinning Solutions & CoKg GmbH; Saurer Spinning Solutions GmbH and Co KG
Priority date: 2018-12-10
Filing date: 2019-12-10
Publication date: 2020-06-16
Anticipated expiration: 2039-12-10
Also published as: CN111285183B; JP2020094322A; JP7341869B2; DE102018131571A1

Abstract

The invention relates to a suction system for providing a negative pressure at a workstation of a textile machine for sucking away pneumatically conveyable waste and for sucking and preparing a thread end for connection thereof, having a suction channel connected to the workstation of the textile machine and a negative pressure source connected to the suction channel. In order to provide a suction system which ensures that the workstations of the textile machine operate in a defined manner even under high load, an additional suction system is provided which is equipped with an additional negative pressure source which is connected to the suction channel in such a way that it can be connected in series with the negative pressure source.

Description

Air extraction system

Technical Field

The invention relates to a suction system for providing a negative pressure at a workstation of a textile machine for sucking away air-transportable waste and sucking and preparing a thread end for connecting the thread end, having a suction channel connected to the workstation of the textile machine and a negative pressure source connected to the suction channel. The invention also relates to a textile machine having such a suction system.

Background

Textile machines, such as automatic winders or spinning machines, for example, consist of a plurality of identical stations which, in particular for their respective different processes, at least at times require suction of air, which is usually provided by one or more suction systems of the textile machine. Without any general limitation, only one air extraction system is mentioned below within the scope of the present application for the sake of simplicity.

On automatic winders, suction air is generally used, for example, for yarn interception and cleaning nozzles, which clean loose particles on the one hand and perform the safety function of intercepting a yarn in the event of a specific yarn break during winding. The yarn intercepting and cleaning nozzle is thus continuously supplied with vacuum at least during normal operation. Likewise, the rotor of the open-end spinning machine is continuously supplied with vacuum during normal spinning operation, also during yarn splicing.

The other working parts of the workstations of different textile machines are only activated from time to time relatively briefly, so that air suction is also only temporarily required. For example, suction nozzles of winding and spinning machines are therefore only required to pick up the yarn from the winding bobbin in the event of a yarn break or during a supply medium change or during a winding bobbin change.

The negative pressure in the central suction channel can be reduced significantly along the textile machine whenever many stations simultaneously need to suck air in the case of frequent yarn breaks or increased dust accumulation. In particular, the underpressure on the winding machine can be significantly reduced when several stations are simultaneously put into operation, for example because of a bobbin change. If the pressure drop is too great, the orderly operation of the workstations of the textile machine is threatened. The underpressure can be reduced so strongly that, for example, the thread end can no longer be found on the surface of the winding bobbin.

Disclosure of Invention

A first aspect of the invention therefore relates to an air suction system for providing a negative pressure at a textile machine station for sucking away air-transportable waste and for sucking and preparing a thread end for connection thereto, which air suction system has a suction channel connected to the textile machine station and a negative pressure source connected to the suction channel.

The proposed suction system is characterized in that an additional suction system equipped with an additional negative pressure source is connected to the suction channel in such a way that the additional negative pressure source and the negative pressure source can be connected in series.

The possibility of connecting an additional suction system with its additional source of negative pressure in series with the suction channel of the suction unit allows a higher negative pressure to be generated in the suction channel as required, so that the reduction in negative pressure due to the increased demand at the station can be balanced. The series connection of the additional negative pressure source with the negative pressure source therefore means an additional suction system arrangement in which the negative pressure in the suction channel is increased by the additional negative pressure source. The additional negative pressure source and the negative pressure source are arranged one behind the other in the flow direction with the additional suction system switched on.

The additional suction system thus allows the additional underpressure to be generated only in the case of specific needs. If not, the additional pumping system may be placed in an energy-saving sleep mode. Overall, the additional suction system means that no costly and high-energy suction system adjustment is required, which overall allows the suction system and the textile machine design connected thereto to be particularly inexpensive and compact.

The connection of the additional suction system to the suction channel can in principle be made in any way. However, according to a particularly advantageous embodiment of the invention, it is provided that the suction channel is connected via a closable inlet to an inlet channel and via a closable outlet to an outlet channel of the additional suction system, wherein the inlet channel is connected on the suction side and the outlet channel is connected on the outlet side to an additional vacuum source.

According to this embodiment of the invention, the additional suction system is parallel to a section of the suction channel and is connected to the suction channel via the inlet channel and the outlet channel at the same time. In order to generate a flow, as required, in this case in series with the additional negative pressure source, the outlet and the inlet can be closed, and the outlet and the inlet ensure that no negative pressure losses occur in the suction channel as a result of flow losses when no additional suction system is required. If necessary, the additional suction system can be switched on by appropriate accessibility of the inlet and outlet to compensate for the negative pressure loss. The connection of the additional suction system to the suction channel via the inlet and the outlet represents a very simple and inexpensive possibility for connecting the additional suction system to the suction system.

The control of the flow in the suction channel and the flow through the additional suction system in the case of switching on thereof can in principle be carried out in any way. However, according to a particularly advantageous embodiment of the invention, a first closing element is provided in the outlet region, which first closing element can be adjusted between a closing position closing the outlet channel and a bypass position closing the suction channel in the outlet region.

In a further advantageous embodiment of the invention, the second closing element is arranged in the inlet region and is adjustable between a closed position, in which it closes the inlet channel, and a bypass position, in which it closes the suction channel in the inlet region.

In this case, by means of the first and second closing elements, not only the air flow flowing through the additional suction system is achieved, but at the same time, by virtue of its arrangement in the bypass position, it is ensured that the entire suction air flow is guided through the additional suction system, so that the additional underpressure source of the additional suction system is reliably arranged in front of the underpressure source in the flow direction.

This ensures that the additional suction system reliably generates a negative pressure in the suction channel. The possibility of adjusting the first and second closing members between their closed position and their bypass position now allows to dispense with an additional adjusting member for determining the flow direction, so that the additional suction system can be connected to the suction channel very simply and inexpensively.

According to a further embodiment of the invention, it is provided that the second closing element is movable between a bypass position, in which it closes the suction channel in the region of the inlet, and an open position, in which it opens the suction channel, wherein a third closing element is provided in the region between the inlet and the additional source of underpressure, which third closing element is movable between a closed position, in which it closes the inlet channel, and an open position, in which it opens the inlet channel. This embodiment of the invention allows a suction flow to be achieved, in which the flow takes place not only along the suction channel but also via an additional suction system, i.e. when the second closing member is in an open position freeing the suction channel and the third closing member is in an open position freeing the inlet channel.

This embodiment of the invention therefore allows, for example, the filter screen to be cleaned by means of an additional suction system if provision is made according to an advantageous development of the invention for the filter screen to be arranged in the inlet channel in the region between the inlet and the third closure element. The particles to be removed from the sieve are guided through an additional suction system and are conveyed away through an air outlet which is arranged according to an advantageous embodiment of the invention at the outlet channel and can be closed and opened by means of an adjustable fourth closing element.

This embodiment of the invention allows a very simple and inexpensive cleaning of the filter screen, wherein the fourth closing member is arranged in the open position only in the case of cleaning of the filter screen to allow a reliable removal of dirt from the filter screen. In normal operation, the closure member is placed in a position closing the exhaust port to ensure reliable flow through the additional suction system as required.

The design of the additional negative pressure source can in principle be carried out in any way. According to a particularly advantageous embodiment of the invention, it is provided that the additional negative pressure source is formed by a fan. The use of a fan allows a very simple, inexpensive and compact design of the additional suction system, wherein the negative pressure which should additionally be generated as required can be determined in a simple manner by the choice of the fan.

According to a particularly advantageous embodiment of the invention, it is further provided that the speed of the additional negative pressure source, and in particular of the fan, is adjustable or in other words controllable. This allows different underpressure to be activated in a controlled manner by the additional suction system. Particularly advantageously, according to a development of the invention, the speed control of the additional negative pressure source is connected to a negative pressure sensor which in a simple manner allows an automatic negative pressure adjustment by the additional suction system.

The additional suction system can in principle be arranged at any location on the suction system. For example, it is possible to arrange an additional suction system on the central suction channel of the suction system, which is connected to a separate work station of the textile machine via a separate machine suction channel. Depending on the overall vacuum prevailing in the central suction channel, a supplementary vacuum can then be generated in the central suction channel as required by means of an additional suction system which can be centrally connected.

However, according to a very advantageous embodiment of the invention, it is provided that the suction channel connected to the additional suction system is formed by a machine suction channel. According to this embodiment of the invention, an additional suction system is associated with each machine suction channel extending from the central suction channel to a separate station of the textile machine. This embodiment of the invention allows additional underpressure to be generated individually as required at the individual stations. The feature of a corresponding design of the suction system is that in this case a sufficiently high vacuum is ensured in a particularly reliable manner in all operating states of the individual workstations of the textile machine in order to operate all of the workstation groups using vacuum.

A second aspect of the invention relates to a textile machine having an air suction system for providing a negative pressure at a workstation of the textile machine for sucking away air-conveyable waste and sucking and preparing a thread end for connection thereto, the air suction system having a suction channel connected to the workstation of the textile machine and a negative pressure source connected to the suction channel.

The textile machine proposed is characterized in that the suction system is constructed according to one or more of the aforementioned designs.

The textile machine can thus be designed very inexpensively and compactly, since no costly and high-energy adjustment of the suction system is required. By means of the suction system, which can be combined/switched with additional systems as required, additional underpressure is generated only in case of specific need. The possibility of being able to connect the additional suction system with its additional source of underpressure in series with the suction channel of the suction system allows a higher underpressure to be generated in the suction channel as required, as a result of which the underpressure reduction caused by the increased demand at the station can be balanced. The additional negative pressure source is connected in series with the negative pressure source and therefore refers to an additional suction system arrangement in which the negative pressure in the suction channel is increased by the additional negative pressure source. The additional negative pressure source and the negative pressure source are arranged one behind the other in the flow direction with the additional suction system switched on. If no additional negative pressure is required, the additional suction system can be put into an energy-saving sleep mode.

Drawings

Embodiments of the invention are described below with reference to the accompanying drawings, which show:

figure 1 is a schematic view of an additional suction system in connection with the suction channel of a station in normal operation,

FIG. 2 is a schematic view of an additional pumping system communicatively coupled to the pumping system of FIG. 1, an

FIG. 3 is a schematic view of the air extraction system of FIG. 1 in a screen cleaning position.

List of reference numerals

1 air extraction system

2 suction channel

3 additional negative pressure source/fan

4 additional suction system

5 inlet

6 inlet channel

7 outlet port

8 outlet channel

9 first closing member

10 second shutter

11 third closing member

12 fourth closure member

13 exhaust port

14 mesh screen

Detailed Description

In the suction system 1 shown in fig. 1 to 3, the additional suction system 4 is connected to the machine suction channel 2 via an inlet channel 6 and an outlet channel 8, whereby the workstations of the textile machine, which are not shown here, are connected to a central suction channel which supplies all the workstations. For connecting the additional suction system 4 to the machine suction channel 2, an inlet 5 and an outlet 7 open at the machine suction channel 2, to which inlet or outlet channel 6 or outlet channel 8, respectively, is connected. At its end opposite the inlet 5 or the outlet 7, the inlet channel 6 as well as the outlet channel 8 are connected to an additional source of underpressure in the form of a fan 3.

In normal operation, as shown in fig. 1, without switching on the additional suction system 4, the second closing element 10, which is arranged in the open position and opens the machine suction channel 2, the third closing element 11, which is arranged in the closed position and closes the inlet channel 6, and the first closing element 9, which is arranged in the closed position and closes the outlet channel 8 and opens the suction channel 2 in the closed position, ensure that the air flow takes place only in the direction of the arrow via the machine suction channel 2.

In case of need, i.e. when the need for negative pressure, which needs to be compensated or provided by the additional suction system 4, decreases or increases, the first closing member 9, the second closing member 10 and the third closing member 11 are set to the positions shown in fig. 2. The first closing element 9 is placed in the bypass position, in which the outlet 7 is released and the machine suction channel 2 is blocked, so that the flow can only take place through the additional suction system 4 and the outlet 7. In the same way, the suction flow is ensured only through the inlet 5 by the second shutter 10 in the bypass position, wherein the inlet channel 6 allows a passage through the additional suction system 4 by the third shutter 11 placed in the open position.

If it is desired to clean the sieve 14 arranged in the region of the inlet 5, the first shutter 9 is in its closed position and the second shutter 10 is in its open position, in which the air flow circulating through the machine suction channel 2 is released. At the same time, the third shutter 11 is also in its open position, so that a part of the suction flow can also be achieved by the additional suction system 4. The impurities to be removed from the sieve 14 are conveyed away through an outlet opening 13 provided at the outlet channel 8, wherein the outlet opening 13 is freed for this purpose by the fourth closing member 12 which is arranged in the open position. After the cleaning of the sieve, the fourth closing element 12 is moved back into a position closing off the air outlet 13 and the third closing element 11 is moved into a position closing off the inlet channel 6, in order thus to ensure proper operation again, without the need for an additional suction system 4. The screen cleaning generally only takes place when no air suction is required at the station, since otherwise the underpressure would be too severely destroyed by the additional load.

Claims

1. An air extraction system for providing a negative pressure at a workstation of a textile machine in order to suck away pneumatically conveyable waste material and to suck and prepare yarn ends for connecting them, said air extraction system having: a suction channel connected to said workstation of said textile machine; and a negative pressure source connected to the suction channel, characterized in that an additional suction system (4) equipped with an additional negative pressure source (3) is provided, which is connected to the suction channel (2) such that the additional negative pressure source (3) can be connected in series with the negative pressure source.

2. An air extraction system according to claim 1, characterized in that the suction channel (2) is connected to an inlet channel (6) via a closable inlet (5) and to an outlet channel (8) of the additional suction system (4) via a closable outlet (7), wherein the inlet channel (6) is connected to the suction side and the outlet channel (8) is connected to the additional underpressure source (3) on the outlet side.

3. Air extraction system according to claim 1 or 2, characterized in that a first closing member (9), in particular a diaphragm, is provided which is arranged in the region of the outlet (7) and which is movable between a closed position closing the outlet channel (8) and a bypass position closing the suction channel (2) in the region of the outlet (7).

4. The suction system according to one or more of the preceding claims, characterized in that a second shutter (10), in particular a diaphragm, is provided which is arranged in the region of the inlet (5) and which is movable between a closed position closing the inlet channel (6) and a bypass position closing the suction channel (2) in the region of the inlet (5).

5. The suction system according to one or more of the preceding claims, characterized in that the second shutter (10) is movable between the bypass position closing the suction channel (2) in the region of the inlet (5) and an open position releasing the suction channel (2), wherein a third shutter (11) is provided in the region between the inlet (5) and the additional source of negative pressure (3), which third shutter is movable between a closed position closing the inlet channel (6) and an open position releasing the inlet channel (6).

6. The extraction system according to one or more of the preceding claims, characterised in that a sieve (14) is provided in the inlet channel (6) in the region between the inlet (5) and the third closure element (11).

7. Gas extraction system according to one or more of the preceding claims, characterized in that an exhaust opening (13) is provided at the outlet channel (8), which can be closed and opened by means of an adjustable fourth closing element (12).

8. Extraction system according to one or more of the preceding claims, characterised in that the additional source of negative pressure is constituted by a fan (3), the speed of which is adjustable.

9. The suction system according to one or more of the preceding claims, characterized in that the speed control means of said additional negative pressure source (3) are connected to a negative pressure sensor.

10. The suction system according to one or more of the preceding claims, characterized in that the suction channel connected to said additional suction system is constituted by a machine suction channel.

11. Textile machine having an air suction system for providing a negative pressure at a workstation of the textile machine for sucking away air-conveyable waste material and sucking and preparing yarn ends for connecting them, the air suction system having a suction channel connected to the workstation of the textile machine and a negative pressure source connected to the suction channel, characterized in that the air suction system (1) is designed according to one or more of claims 1 to 10.