Air pipe for rotor spinning machine

Abstract

The utility model belongs to the technical field of rotor spinning machines, and particularly relates to an air pipe for a rotor spinning machine, the air pipe is arranged on a rack of the rotor spinning machine and used for providing required negative pressure for each spinning station of the rotor spinning machine, the air pipe comprises a plurality of air pipe units, and the air pipe units are connected end to end through connecting assemblies. Each air pipe unit is used for positioning an air pipe on the rack through a positioning assembly when the air pipe is mounted; each air pipe unit comprises an air pipe body, a first connecting block and a second connecting block; the connecting assembly comprises a first interface and a second interface; the positioning assembly comprises a first positioning block and a second positioning block; on the premise that the air pipe units form the full-length air pipe through the connecting assemblies, the connecting blocks are integrally arranged on the air pipe body and used for being matched with the single-spindle valve, and the air pipe is rapidly assembled on the rotor spinning machine on the basis that the positioning assemblies are used for providing the positioning effect. The problem that an existing air pipe structure affects the working efficiency when the whole rotor spinning machine is assembled is solved.

Description

Technical Field

[0001] This utility model belongs to the technical field of rotor spinning machines, and specifically relates to an air duct for rotor spinning machines. Background Technology

[0002] With the rapid development of the spinning industry and the continuous improvement of automation, various new spinning methods have emerged. Among them, rotor spinning machines have become the most mature, widely used, and economical spinning form due to their characteristics of high spinning speed, large package capacity, good adaptability to spinning, and ability to spin raw materials of various qualities.

[0003] Each spinning station in a rotor spinning machine is equipped with an automatic splicing device, which requires negative pressure to achieve its automatic splicing purpose. The negative pressure required by the existing rotor spinning machine is provided by negative pressure fans located at the head and tail of the machine, in conjunction with the air duct that runs through the entire rotor spinning machine. The air duct is a long pipe, and the side wall of the air duct has an air outlet corresponding to each spinning station. The negative pressure is connected to the automatic splicing device through a single spindle valve and the corresponding connecting pipe.

[0004] Because the end of the single-spindle valve connected to the duct is flat, while the side wall of the duct is curved, a transition piece needs to be welded to connect the duct and the single-spindle valve to provide negative pressure for the automatic coupling device. This severely affects the convenience of the duct preparation process. In addition, when welding transition pieces to each spinning station on the long duct, the welding position of the transition pieces needs to be considered to ensure that the assembly tolerance with the single-spindle valve is within the allowable range and to prevent negative pressure leakage. Furthermore, when assembling the duct and the single-spindle valve on the rotor spinning machine, a flat plate needs to be welded to the frame of the rotor spinning machine as a reference beforehand. When the single-spindle valve and the flat plate are aligned, the single-spindle valve is then connected to the equipment requiring negative pressure in the automatic coupling device. The entire operation and installation process described above causes great difficulties for workers in duct preparation and negative pressure device installation, seriously affecting work efficiency. Utility Model Content

[0005] In view of this, the present invention provides an air duct for a rotor spinning machine, which adopts a split design, with each air duct unit having the same structure. Furthermore, by using connecting components to connect the air duct units end to end to form a continuous air duct, a connecting block is integrally set on the air duct body of each air duct unit to cooperate with the single spindle valve. With the positioning component providing a positioning effect, it is convenient to quickly assemble the air duct onto the rotor spinning machine, aiming to solve the problem of the existing air duct structure affecting the working efficiency during the overall assembly of the rotor spinning machine.

[0006] A duct for a rotor spinning machine is mounted on the machine frame and provides the required negative pressure to each spinning station. The duct comprises several identical duct units connected end-to-end by connecting components. Each duct unit corresponds one-to-one with each spinning station. Furthermore, each duct unit is positioned on the machine frame using a positioning component.

[0007] The duct unit has an overall cylindrical tubular structure. The duct unit includes a duct body, on which a first connecting block and a second connecting block are provided on the circumferential sidewall. The first connecting block and the second connecting block are respectively provided with a first air outlet and a second air outlet, and the first air outlet and the second air outlet are both connected to the duct body. In addition, the first connecting block and the second connecting block are respectively connected to a first single-spindle valve and a second single-spindle valve. The duct unit is connected to the spinning station through the first single-spindle valve and the second single-spindle valve to provide negative pressure to the spinning station.

[0008] The connecting component includes a first interface located at one end of the duct body in the duct unit and a second interface located at the other end of the duct body. The outer circumferential diameter of the first interface is smaller than the inner circumferential diameter of the second interface. By covering and fitting the second interface of any duct unit onto the outer circumferential wall of the first interface of another duct unit, the two duct units are connected end to end. On this basis, a plurality of snap-fit ​​blocks are evenly spaced on the outer circumferential wall of the first interface, and a plurality of L-shaped snap-fit ​​grooves are provided on the inner circumferential wall of the second interface corresponding to the plurality of snap-fit ​​blocks. The L-shaped snap-fit ​​grooves are composed of a channel portion and a snap-fit ​​portion. When any two duct units are connected through the first interface and the second interface, the two duct units are locked and fixed by the cooperation of the snap-fit ​​blocks and the snap-fit ​​portions.

[0009] The positioning component includes a first positioning block and a second positioning block disposed on the circumferential sidewall of the air duct body. The first positioning block is located on one side of the first interface, and the second positioning block is located on the circumferential outer wall of the second interface. Furthermore, the side of the first positioning block away from the air duct body is configured as a first positioning surface, and the side of the second positioning block away from the air duct body is configured as a second positioning surface. Both the first positioning surface and the second positioning surface are planar and lie in the same plane. When the first positioning surface and the second positioning surface simultaneously abut against the frame, the positioning component performs its positioning function. At this time, the first single-spindle valve and the second single-spindle valve are aligned with the subsequent negative pressure transmission equipment in the spinning station and have a structural foundation for interconnection with them.

[0010] Preferably, the entire duct is made of PVC.

[0011] Furthermore, in each of the duct units, the first connecting block and the second connecting block are provided with two threaded holes, and the first single-spindle valve and the second single-spindle valve are respectively provided with screws corresponding to each threaded hole. Through the threaded engagement of the screws with the threaded holes, the first single-spindle valve and the second single-spindle valve are respectively connected to the first connecting block and the second connecting block.

[0012] Furthermore, in each of the duct units, the first connecting block and the second connecting block are provided with weight-reducing grooves, and the weight-reducing grooves do not interfere with the threaded holes.

[0013] Preferably, in the positioning component, the first positioning block and the second positioning block are also provided with a plurality of weight reduction grooves.

[0014] Furthermore, the positioning component also includes: a first slot on the side wall of the first positioning block away from the first connecting block, and a second slot on the side wall of the second positioning block away from the first connecting block. The first slot and the second slot correspond to each other, and the first slot and the second slot are fastened together to a U-shaped buckle. When any two duct units are connected by the connecting component, and the buckle is fastened to the first slot and the second slot, the end face of the buckle is in the same plane as the first positioning surface and the second positioning surface.

[0015] The beneficial effects of this utility model are as follows:

[0016] In general, this invention transforms the existing continuous air duct into a segmented structure, providing several structurally identical air duct units, each corresponding to a spinning station. Connecting components on these air duct units end-to-end forms a duct that provides negative pressure to the entire rotor spinning machine. Furthermore, a first connecting block and a second connecting block are provided on the air duct body of each air duct unit to connect the air duct to the first and second single-spindle valves before the rotor spinning machine is fully assembled. Assembly tolerances are limited by positioning components on the air duct body. When the positioning components function, it indicates that the connection between the first and second single-spindle valves and the first and second connecting blocks is within the allowable tolerance range. At this point, the positioning components facilitate the overall installation of the air duct onto the rotor spinning machine frame, saving workers measurement time during the assembly of the rotor spinning machine and improving work efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the duct in this utility model;

[0019] Figure 2 This is a schematic diagram of the specific structure of the air duct unit in this utility model;

[0020] Figure 3 This is a schematic diagram showing the specific structure of the connecting component and the positioning component in this utility model;

[0021] Figure 4 This is a schematic diagram of the specific structure of the snap-fit ​​in the positioning component;

[0022] Figure 5 This is a schematic diagram of the connection structure between the air duct body and the first and second single-spindle valves in this utility model. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0025] The solution provided by this utility model will now be described in detail with reference to the accompanying drawings.

[0026] The present invention provides an air duct for a rotor spinning machine, which is installed on the frame of the rotor spinning machine to provide the required negative pressure for each spinning station of the rotor spinning machine. It should be noted that: in the prior art, each spinning station is equipped with an automatic splicing device. The swing arm suction nozzle and yarn storage device in the automatic splicing device both require negative pressure to perform their functions. The negative pressure used by the rotor spinning machine is provided by a negative pressure device. According to the prior art, the negative pressure device mainly includes air duct 1, and air duct 1 runs through each spinning station of the entire rotor spinning machine. Therefore, air duct 1 is required to provide negative pressure for each spinning station in general.

[0027] like Figure 1-2 As shown, the air duct 1 includes several air duct units 3 with the same structure, and the air duct units 3 are connected end to end by the connecting component 4. Each air duct unit 3 corresponds to each spinning station. On this basis, each air duct unit 3 is positioned on the frame by the positioning component 5.

[0028] In this application, the original continuous air duct 1 structure is abandoned, and several air duct units 3 are designed to correspond one-to-one with each spinning station. Furthermore, the entire material of the air duct 1 is made of PVC, which allows for the mass production of air duct units 3 under the same mold design. This can meet the needs of rotor spinning machines with different spindle numbers and models, eliminating the need to produce air ducts 1 of different lengths according to the number of spinning stations of the rotor spinning machine, thus increasing the convenience of production and assembly.

[0029] The specific structure and function of duct unit 3 will be explained in detail below, such as... Figure 2 As shown, the duct unit 3 has a cylindrical tubular structure. The duct unit 3 includes a duct body 301. A first connecting block 302 and a second connecting block 303 are provided on the circumferential side wall of the duct body 301. A first air outlet 304 and a second air outlet 305 are provided on the first connecting block 302 and the second connecting block 303 respectively. The first air outlet 304 and the second air outlet 305 are both connected to the duct body 301.

[0030] In this embodiment, as Figure 5 As shown, the first connecting block 302 and the second connecting block 303 are respectively connected to the first single-spindle valve 6 and the second single-spindle valve 7. The air duct unit 3 is connected to the spinning station through the first single-spindle valve 6 and the second single-spindle valve 7. When the rotor spinning machine provides negative pressure to the spinning station through the negative pressure device, the opening and closing degree of the first single-spindle valve 6 and the second single-spindle valve 7 is used to control the magnitude of the negative pressure connected to the spinning station. The first single-spindle valve 6 and the second single-spindle valve 7 are commonly used components of rotor spinning machines in the prior art. This application only introduces their usage and does not describe their structure in detail.

[0031] Based on the above embodiments, such as Figure 2 , Figure 5 As shown, both the first connecting block 302 and the second connecting block 303 are provided with two threaded holes 306. The first single-spindle valve 6 and the second single-spindle valve 7 are respectively provided with screws corresponding to each threaded hole 306. Through the threaded engagement of the screws with the threaded holes 306, the first single-spindle valve 6 and the second single-spindle valve 7 are respectively connected to the first connecting block 302 and the second connecting block 303. In addition, both the first connecting block 302 and the second connecting block 303 are provided with weight-reducing grooves 8. The weight-reducing grooves 8 and the threaded holes 306 do not interfere with each other.

[0032] Therefore, the first connecting block 302 and the second connecting block 303 provided in conjunction with the first single-spindle valve 6 and the second single-spindle valve 7 make the installation of the single-spindle valve on the air duct 1 more convenient, eliminating the need for additional transition parts in the existing rotor spinning machine to connect the air duct 1 with each single-spindle valve, and improving the work efficiency of the staff in installing each single-spindle valve with the air duct 1; while the setting of the weight reduction groove 8 saves raw materials while meeting the structural requirements.

[0033] For the interconnection of several duct units 3, this application provides a corresponding connecting component 4 on each duct unit 3, such as... Figure 2-3 As shown, the connecting component 4 includes a first interface 401 located at one end of the duct body 301 in the duct unit 3, and a second interface 402 located at the other end of the duct body 301, wherein the outer circumferential diameter of the first interface 401 is smaller than the inner circumferential diameter of the second interface 402.

[0034] Based on the above embodiments, by covering and fitting the second interface 402 of any one duct unit 3 onto the outer circumferential wall of the first interface 401 of another duct unit 3, the two duct units 3 are connected end to end. In addition, a sealing ring is also fitted on the outer circumferential wall of the first interface 401, so that when the first interface 401 and the second interface 402 are in mutual cooperation, several duct units 3 are sealed at the interface where they are connected, thus avoiding negative pressure leakage.

[0035] Based on this, such as Figure 3 As shown, a plurality of snap-fit ​​blocks 403 are evenly spaced on the outer circumference of the first interface 401, and a plurality of L-shaped snap-fit ​​grooves are provided on the inner circumference of the second interface 402 corresponding to the plurality of snap-fit ​​blocks 403. The L-shaped snap-fit ​​grooves are composed of channel portions 404 and snap-fit ​​portions 405. When any two duct units 3 are connected through the first interface 401 and the second interface 402, the two duct units 3 are locked and fixed by the cooperation of the snap-fit ​​blocks 403 and the snap-fit ​​portions 405. Specifically, when two duct units 3 are connected through the first interface 401 and the second interface 402, a plurality of snap-fit ​​blocks 403 slide simultaneously in a plurality of corresponding channel portions 404 until the snap-fit ​​blocks 403 slide to the bottom of the channel portion 404. Then, one of the duct units 3 is rotated, so that a plurality of snap-fit ​​blocks 403 are simultaneously rotated and inserted into the corresponding plurality of snap-fit ​​portions 405, thereby completing the locking and fixing between the two duct units 3.

[0036] Based on the above embodiments, the staff can determine the number of air duct units 3 to be used according to the actual number of spindles and model of the rotor spinning machine, and use the connecting component 4 to connect the required air duct units 3 end to end to form air duct 1, making the installation of air duct 1 more convenient.

[0037] In this technical solution, in addition to making convenient improvements to the structure of the air duct 1 required for the entire rotor spinning machine, this application also makes specific structural improvements to the operation method of connecting the air duct 1 with each spinning station, that is, setting a positioning component 5 on the air duct body 301.

[0038] like Figure 2-3 As shown, the positioning component 5 includes a first positioning block 501 and a second positioning block 502 disposed on the circumferential sidewall of the duct body 301. The first positioning block 501 is located on one side of the first interface 401, and the second positioning block 502 is located on the circumferential outer wall of the second interface 402. In addition, the side of the first positioning block 501 away from the duct body 301 is configured as a first positioning surface 503, and the side of the second positioning block 502 away from the duct body 301 is configured as a second positioning surface 504. The first positioning surface 503 and the second positioning surface 504 are both planes and are in the same plane.

[0039] Based on the above embodiments, when the first positioning surface 503 and the second positioning surface 504 simultaneously abut against the frame, the positioning component 5 performs its positioning function. At this time, the first single-spindle valve 6 and the second single-spindle valve 7 are aligned with the subsequent negative pressure transmission equipment in the spinning station and have a structural foundation for interconnection with them. Here, the subsequent negative pressure transmission equipment refers to the connecting pipe that plays the role of transmitting negative pressure. This connecting pipe is connected to the required negative pressure equipment in the automatic splicing device, such as the swing arm suction nozzle, yarn storage device, etc. Specifically, after the air duct 1 is assembled according to the foregoing and the first single-spindle valve 6 and the second single-spindle valve 7 are installed in each air duct unit 3, the air duct 1 needs to be assembled into the rotating... On the frame of the cup spinning machine, the worker places the air duct 1 on the frame and rotates the air duct 1 so that the first positioning surface 503 and the second positioning surface 504 in the positioning component 5 of each air duct unit 3 simultaneously fit into the frame itself. At this time, the worker can install the first single-spindle valve 6 and the second single-spindle valve 7 with the subsequent negative pressure transmission equipment in the spinning station. The assembly tolerance of the first single-spindle valve 6 and the second single-spindle valve 7 meets the requirements. This process eliminates the original assembly process that required the worker to sequentially match each single-spindle valve with the transition piece and each single-spindle valve with the flat plate preset on the frame, making the installation process more convenient and improving production efficiency.

[0040] In addition, in positioning component 5, such as Figure 3-4 As shown, the first positioning block 501 and the second positioning block 502 are also provided with a number of weight reduction grooves 8. Based on the weight reduction grooves 8, the positioning component 5 also includes a first slot 505 opened on the side wall of the first positioning block 501 away from the first connecting block 302, and a second slot 506 opened on the side wall of the second positioning block 502 away from the first connecting block 302. The first slot 505 and the second slot 506 correspond to each other, and the first slot 505 and the second slot 506 are fastened together to a U-shaped buckle 2.

[0041] Based on the above embodiments, when any two duct units 3 are connected by the connecting component 4, and the buckle 2 is engaged with the first slot 505 and the second slot 506, the end face of the buckle 2 is in the same plane as the first positioning surface 503 and the second positioning surface 504. The cooperation between the buckle 2 and the first slot 505 and the second slot 506 strengthens the connection effect of the connecting component 4 and prevents the two duct units 3 from rotating relative to each other. On the other hand, it also facilitates the operation of the staff to move the assembled duct 1 as a whole.

[0042] Specifically, this utility model provides a duct for a rotor spinning machine, transforming the existing continuous duct into a segmented design, with each duct unit 3 corresponding to a spinning station. Furthermore, the entire duct 1 is made of PVC, allowing for mass production of duct units 3 using the same mold design. This caters to rotor spinning machines with different spindle counts, eliminating the need to produce ducts of varying lengths based on the number of spinning stations. In addition, this application also provides a first connecting block 302 and a second connecting block 302 integrally connected to the duct body 301 of the duct unit 3, respectively used for assembling the first single-spindle valve 6 and the second... The single-spindle valve 7 eliminates the need for additional transition pieces in existing rotor spinning machines to connect the air duct 2 with each single-spindle valve, improving the efficiency of installation for workers. Furthermore, this application utilizes the connecting component 4 on the air duct unit 3 to connect them end-to-end. With the positioning component 5, workers can easily install the first single-spindle valve 6 and the second single-spindle valve 7 with the subsequent negative pressure transmission equipment in the spinning station. This eliminates the need for workers to sequentially match each single-spindle valve with the transition piece and each single-spindle valve with the pre-installed flat plate on the frame during the original assembly process, making the installation process more convenient and improving production efficiency.

[0043] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A duct for a rotor spinning machine, mounted on the frame of the rotor spinning machine, for providing the required negative pressure to each spinning station of the rotor spinning machine, characterized in that: The air duct comprises several structurally identical air duct units, which are connected end-to-end by connecting components. Each air duct unit corresponds one-to-one with each spinning station. Furthermore, each air duct unit is positioned on the machine frame using a positioning component. The duct unit has an overall cylindrical tubular structure. The duct unit includes a duct body, on which a first connecting block and a second connecting block are provided on the circumferential sidewall. The first connecting block and the second connecting block are respectively provided with a first air outlet and a second air outlet, and the first air outlet and the second air outlet are both connected to the duct body. In addition, the first connecting block and the second connecting block are respectively connected to a first single-spindle valve and a second single-spindle valve. The duct unit is connected to the spinning station through the first single-spindle valve and the second single-spindle valve to provide negative pressure to the spinning station. The connecting component includes a first interface located at one end of the duct body in the duct unit and a second interface located at the other end of the duct body. The outer circumferential diameter of the first interface is smaller than the inner circumferential diameter of the second interface. By covering and fitting the second interface of any duct unit onto the outer circumferential wall of the first interface of another duct unit, the two duct units are connected end to end. On this basis, a plurality of snap-fit ​​blocks are evenly spaced on the outer circumferential wall of the first interface, and a plurality of L-shaped snap-fit ​​grooves are provided on the inner circumferential wall of the second interface corresponding to the plurality of snap-fit ​​blocks. The L-shaped snap-fit ​​grooves are composed of a channel portion and a snap-fit ​​portion. When any two duct units are connected through the first interface and the second interface, the two duct units are locked and fixed by the cooperation of the snap-fit ​​blocks and the snap-fit ​​portions. The positioning component includes a first positioning block and a second positioning block disposed on the circumferential sidewall of the air duct body. The first positioning block is located on one side of the first interface, and the second positioning block is located on the circumferential outer wall of the second interface. Furthermore, the side of the first positioning block away from the air duct body is configured as a first positioning surface, and the side of the second positioning block away from the air duct body is configured as a second positioning surface. Both the first positioning surface and the second positioning surface are planar and lie in the same plane. When the first positioning surface and the second positioning surface simultaneously abut against the frame, the positioning component performs its positioning function. At this time, the first single-spindle valve and the second single-spindle valve are aligned with the subsequent negative pressure transmission equipment in the spinning station and have a structural foundation for interconnection with them.

2. The air duct for a rotor spinning machine according to claim 1, characterized in that: The entire duct is made of PVC.

3. The air duct for a rotor spinning machine according to claim 1, characterized in that: In each of the duct units, the first connecting block and the second connecting block are provided with two threaded holes. The first single-spindle valve and the second single-spindle valve are respectively provided with screws corresponding to each threaded hole. The first single-spindle valve and the second single-spindle valve are connected to the first connecting block and the second connecting block respectively by the threaded engagement of the screws with the threaded holes.

4. The air duct for a rotor spinning machine according to claim 3, characterized in that: In each of the duct units, the first connecting block and the second connecting block are provided with weight-reducing grooves, and the weight-reducing grooves do not interfere with the threaded holes.

5. The air duct for a rotor spinning machine according to claim 1, characterized in that: In each of the duct units, a sealing ring is also fitted on the outer circumferential wall of the first interface.

6. The air duct for a rotor spinning machine according to claim 1, characterized in that: In the positioning component, both the first positioning block and the second positioning block are provided with a number of weight reduction grooves.

7. The air duct for a rotor spinning machine according to claim 6, characterized in that: The positioning component further includes: a first slot on the side wall of the first positioning block away from the first connecting block, and a second slot on the side wall of the second positioning block away from the first connecting block. The first slot and the second slot correspond to each other, and the first slot and the second slot are fastened together to a U-shaped buckle. When any two duct units are connected by the connecting component, and the buckle is fastened to the first slot and the second slot, the end face of the buckle is in the same plane as the first positioning surface and the second positioning surface.

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