Cotton suction fan and compact spinning frame thereof

Abstract

The utility model relates to a cotton suction air bellow and strong cluster spinning frame thereof, wherein the cotton suction air bellow is provided with a box body, the front side of the box body is a cotton suction cavity, and the rear side is a fan cavity; a blast pipe is arranged in the cotton suction cavity; a fan is connected to the rear side of the blast pipe; a rotatable and swingable filter screen cylinder is installed on the front side of the blast pipe; and cleaning devices independently swingable are installed on the left and right sides in front of the cotton suction cavity. The strong cluster spinning frame is provided with the cotton suction air bellow installed at one end of the strong cluster spinning frame, a dust suction air duct of the strong cluster spinning frame connected to an air inlet of the cotton suction air bellow, and a butt joint air pipe of a strong cluster spinning assembly penetrating through the dust suction air duct, the cotton suction air bellow and the fan in the cotton suction air bellow. The utility model realizes automatic cleaning of cotton fibers on the filter screen, and the cleaned cotton fibers and dust are located in a static pressure area, that is, the filter screen is not re-pasted, and the cleaning operation of workers is not affected; the working efficiency of the spinning frame is effectively improved, and the continuous reliability and stability of yarn production are improved.

Description

Technical Field

[0001] This utility model relates to a cotton suction fan for a spinning machine, and a high-density spinning machine using the fan, belonging to the field of spinning machinery and equipment. Background Technology

[0002] Spinning machines require fans, typically suction fans, to absorb yarn or remove flyaway yarn generated during spinning, preventing disruption to the machine's safe operation and yarn quality. The applicant previously filed a patent application (Chinese Patent Publication No. CN223047664U) for a high-polymer spinning component and its spinning machine, which specifically requires suction fans or negative pressure fans.

[0003] When air containing cotton fibers enters the fan area through the duct, filters are generally used to intercept the fibers, preventing them from entering the fan and causing damage, or preventing the fibers from being directly discharged by the fan and flying around in the workshop. Examples include a self-cleaning cotton suction box device for ring spinning machines (Chinese Patent Publication No. CN222961657U), a multi-functional air box for spinning machines (Chinese Patent Publication No. CN221544873U), and a cotton stripping mechanism for spinning machine air boxes (Chinese Patent Publication No. CN219260330U). In current cotton suction boxes, when cotton fibers accumulate to a certain thickness on the filter screen, the air pressure drops, hindering the operation of the spinning machine. At this point, the filter screen needs to be cleaned. During cleaning, most simple cotton suction boxes simply open the access door and reach in to remove the accumulated cotton fibers from the filter screen. At this point, the cotton fibers are usually piled up into a cotton blanket, making them relatively easy to remove. However, opening the access door allows the inside of the suction box to connect with the atmospheric environment, causing the air pressure to drop rapidly, further affecting the operation of the spinning machine. Boxes using internal automated cotton stripping and cleaning mechanisms generally have relatively complex designs, which are not conducive to the normal operation of the suction box. When cotton debris needs to be removed after automatic cleaning, opening the suction box access door also causes a drop in air pressure, but the frequency of opening is significantly reduced compared to conventional suction boxes, thus minimizing the impact.

[0004] However, in order to further reduce the impact on the operation of the spinning machine and ensure the consistent quality of the yarn, it is necessary to further improve the structure of the cotton suction box. Utility Model Content

[0005] The purpose of this utility model is to provide a cotton suction air box and its high-density spinning machine. The internal structure of the cotton suction air box is improved. By setting a filter cartridge assembly and a cleaning device, the filter screen can be automatically cleaned. The cleaned cotton fibers and dust will not enter the air pressure area. Moreover, the cleaning device seals the air pressure area. In this way, even if the side is opened to remove the cleaned cotton fibers and dust, it will not affect the air pressure area. This makes the generated negative pressure airflow more continuous, stable and reliable, thereby ensuring the reliable operation of the high-density spinning machine and reducing the defect rate of yarn.

[0006] To achieve the above-mentioned utility model objectives, in the first aspect of this utility model, a cotton suction box is provided, which has a box body, with a cotton suction chamber on the front side and a fan chamber on the rear side.

[0007] The front end of the cotton suction chamber is equipped with an air inlet; the left and right sides of the cotton suction chamber are equipped with openable side doors.

[0008] A blower is installed inside the suction chamber near the blower chamber; a blower is connected to the rear side of the blower and is located inside the blower chamber.

[0009] A rotatable and swingable filter cylinder is installed on the front side of the air duct, and independently swingable cleaning devices are installed on the left and right sides of the front of the cotton suction chamber.

[0010] The air duct has a cylindrical body with an arc-shaped section. An air inlet is located on the front side of the cylindrical body within the arc-shaped section. A rear sealing plate is provided on the rear side of the cylindrical body, with an air outlet in the middle of the rear sealing plate, which is connected to the air inlet of the fan. The cylindrical body has bottom plates at the top and bottom.

[0011] The filter cylinder is equipped with a filter screen, which is arc-shaped and its curvature matches that of the cylinder body. The filter screen can rotate and swing relative to the cylinder body, and its inner arc surface always adheres to the arc surface of the cylinder body.

[0012] The filter screen is connected to the filter screen cylinder swing drive mechanism; the filter screen is divided into two parts along the left and right sides, namely the left screen surface and the right screen surface; under the drive of the filter screen cylinder swing drive mechanism, the left screen surface and the right screen surface alternately block the air passage area of ​​the air duct.

[0013] The cleaning device is located on the left and right sides in front of the air vent; the cleaning device includes a cleaning plate with a cleaning end, and the cleaning plate is connected to a cleaning drive device; under the drive of the cleaning drive device, the cleaning end of the cleaning plate contacts or separates from the filter screen.

[0014] As a further improvement of this utility model, the arc axis of the cylinder is coaxial with the arc axis of the filter screen;

[0015] The included angle of curvature of the air inlet on the cylinder within the horizontal projection plane is α;

[0016] The angle between the arcs of the filter screen and the horizontal projection plane is b;

[0017] The arc angle between the curved section of the cylinder and the horizontal projection plane is c;

[0018] c>a, b≥2a.

[0019] Furthermore, c ≥ 3a; the filter screen is always located on the outside of the arc-shaped section of the cylinder.

[0020] Furthermore, a = 80°, b = 162°, and c = 240°.

[0021] As a further improvement of this utility model, the filter screen of the filter cylinder is provided with connecting plates at the top and bottom, which are welded to the top and bottom sides of the filter screen.

[0022] The connecting plates on the upper and lower sides of the filter screen cylinder are located on the outer side of the bottom plates on the upper and lower sides of the air duct;

[0023] The filter screen of the filter cylinder has a rotating shaft installed at the arc-shaped center. The rotating shaft is installed on the upper and lower base plates of the air duct through bearing seats, or the rotating shaft is installed on the upper and lower walls of the housing through bearing seats.

[0024] The rotating shaft is connected to the filter cylinder swing drive mechanism.

[0025] Furthermore, the rotating shaft extends upwards or downwards, passing through the suction chamber; the filter cylinder swing drive mechanism is located outside the suction chamber;

[0026] A swing arm is fixedly connected to the rotating shaft, and the swing arm is hinged to the end of the piston rod of the filter cylinder drive cylinder;

[0027] The tail end of the filter cylinder drive cylinder is hinged to the mounting base.

[0028] As a further improvement of this utility model, one end of the cleaning plate of the cleaning device is hinged to the inner wall of the box via a hinge;

[0029] The other end of the cleaning plate is hinged to the front end of the piston rod of the cleaning drive cylinder;

[0030] The end of the cylinder body of the cleaning drive cylinder is hinged to the mounting seat on the inner side of the housing.

[0031] The cleaning drive cylinder is located on the outside of the cleaning plate.

[0032] As a further improvement of this utility model, the cleaning end of the cleaning plate is a detachable and replaceable cotton stripping device.

[0033] As a further improvement of this utility model, the cleaning plate of the cleaning device abuts against the upper and lower walls of the inner side of the cotton suction chamber of the box.

[0034] The filter screen of the filter cylinder rests against the upper and lower walls of the inner side of the cotton suction chamber;

[0035] The contact area between the cleaning plate and the filter screen is equipped with a sealing structure.

[0036] Furthermore, limiting strips are provided at both ends of the filter screen;

[0037] The limit strips are set from top to bottom and cooperate with the sealing structure of the cleaning plate.

[0038] In a second aspect, this utility model provides a high-polymer spinning machine, wherein the cotton suction box as described above is installed at one end of the high-polymer spinning machine, the dust suction duct of the high-polymer spinning machine is connected to the air inlet of the cotton suction box, and the connecting air pipe of the high-polymer spinning component is connected to the fan inside the cotton suction box through the dust suction duct and the cotton suction box.

[0039] When the cotton suction box of this utility model is working, the fan is turned on and working. At this time, the air enters the dust suction duct through the outside of the spinning machine, and then enters the cotton suction chamber through the air inlet of the dust suction duct. Then it enters the air duct through the filter screen and the air outlet, and then enters the fan through the air outlet, and finally is discharged from the box.

[0040] When the filter cylinder is in the right-side area, the left side of the filter screen is the cleaning filter screen, located in the air vent area, which shields the air vent. Cotton fibers generated during the spinning process will enter the cotton suction box of this invention with the air, but when they pass through the left side of the filter screen, most of them will be trapped by the filter screen, and only the filtered air can continue to the rear through the air vent.

[0041] As cotton fibers remain on the left side of the filter screen, they gradually clog the mesh, causing the air pressure to decrease. When the air pressure drops to the lower threshold, the filter screen cylinder needs to be rotated in time to replace it with a clean filter screen.

[0042] If the left mesh is blocked and the right mesh needs to be replaced, (1) the right drive cylinder drives the right cleaning plate to extend, so that the cotton stripping device of the right cleaning plate abuts against the filter screen, especially the left end of the right mesh; (2) the left drive cylinder drives the left cleaning plate to retract, away from the filter screen; (3) the filter screen cylinder drives the filter screen to rotate to the left; during this process, the cotton fibers on the right mesh (which were trapped when the right mesh was used for filtration last time) will be scraped off by the cotton stripping device of the right cleaning plate and left in the right cavity, while the cleaned right mesh gradually moves into the air passage area to block the air passage until the cleaned right mesh is completely turned to the middle, i.e., the air passage area; while the left mesh gradually moves away from the air passage area during this process, and moves into the left cavity without obstruction with the cotton fibers that were just trapped by filtration. Throughout the process, the blower continues to work and does not need to be stopped at all; after the replacement is completed, the air pressure will return to normal.

[0043] Correspondingly, when the right mesh surface has been working for a period of time and has retained enough cotton fibers, and the left mesh surface needs to be replaced, (1) the left drive cylinder drives the left cleaning plate to extend, so that the cotton stripping device of the left cleaning plate abuts against the filter screen, mainly against the right end of the left mesh surface; (2) the right drive cylinder drives the right cleaning plate to retract and move away from the filter screen; (3) the filter screen cylinder drives the filter screen to rotate to the right; during this process, the cotton fibers on the left mesh surface will be scraped off by the cotton stripping device of the left cleaning plate and left in the left cavity, while the cleaned left mesh surface gradually moves into the air passage area to block the air passage until the cleaned left mesh surface is completely turned to the middle, that is, the air passage area; while the right mesh surface gradually moves away from the air passage area during this process, and moves into the right cavity without obstruction with the cotton fibers that have just been filtered and retained.

[0044] This novel suction box can cyclically use the left and right mesh surfaces of the filter, automatically cleaning the cotton fibers trapped on the filter during rotation, resulting in a clean and usable filter surface. The static pressure chambers on both sides (left and right chambers) are also large enough to accommodate multiple scrapes of cotton fibers. Workers only need to open the side door periodically to remove the cotton fibers from the static pressure chambers; during this process, the cleaning plate reliably rests against the filter, maintaining static pressure on both sides and preventing any impact on the central airflow.

[0045] This novel suction box can rotate the filter screen according to the decrease in air pressure, changing the left and right screen surfaces. It can also be rotated and changed at set intervals. Generally, it can operate for about ten minutes before initiating a replacement operation. Because it is driven by a cylinder, each replacement operation generally only takes five seconds. Therefore, the time window for workers to open the side door for cleaning operations is quite long.

[0046] The cotton suction box of this invention, through a simplified cleaning process, ensures that the filter screen covering the air inlet area remains sufficiently clean, reducing the impact on negative pressure airflow parameters such as air pressure, air volume, and air velocity, and ensuring that the spinning machine always obtains a stable and reliable working airflow.

[0047] The cotton suction box of this invention can be applied to a high-density spinning machine, so that a stable negative pressure is formed in the cavity of the high-density spinning component, and a reliable negative pressure is generated on the high-density spinning component to strongly concentrate the yarn, thereby obtaining a reliable, stable and strong yarn strength.

[0048] This invention improves the internal structure of the cotton suction box, thereby achieving automatic cleaning of cotton fibers on the filter screen. The cleaned cotton fibers and dust are located in the static pressure zone, preventing them from re-clogging the screen and not interfering with the worker's cleaning operation. This effectively improves the working efficiency of spinning machines using this cotton suction box, especially high-density spinning machines, and enhances the continuous reliability and stability of yarn production. Attached Figure Description

[0049] Figure 1 This is a structural outline of the cotton suction box of this utility model;

[0050] Figure 2 This is a schematic diagram of the internal structure of the cotton suction box of this utility model;

[0051] Figure 3 This is a schematic diagram of the overall structure of the filter cartridge assembly;

[0052] Figure 4 This is a schematic diagram of the overall structure of the ventilation duct;

[0053] Figure 5 This is a schematic diagram of the overall structure of the filter cylinder;

[0054] Figure 6 This is a horizontal sectional view of the working state of the cotton suction box of this utility model (the filter cylinder is on the right side).

[0055] Figure 7 for Figure 6 A magnified view of a portion of the image;

[0056] Figure 8 This is a schematic diagram of the cleaning process of the filter cylinder of the suction box of this utility model rotating to the left.

[0057] Figure 9 This is a schematic diagram showing the working state of the cotton suction box of this utility model with the filter cylinder on the left side;

[0058] Figure 10 This is a schematic diagram of the cleaning process of the filter cylinder of the suction box of this utility model rotating to the right. Detailed Implementation

[0059] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0060] This utility model addresses the bellows requirements of spinning machines, especially high-polymer spinning machines, during operation, and designs a cotton suction bellows. The overall structure is as follows: Figure 1 , Figure 2 As shown, a rectangular box 1 is provided. The shape and size of the box 1 are basically the same as the original cotton suction box, so that the cotton suction box of the existing spinning machine can be easily replaced without taking up extra equipment space. The front side of the box 1 is the cotton suction chamber 11, the rear side is the fan chamber 15, and preferably, an equipment chamber 17 is also provided on the top.

[0061] The front end of the cotton suction chamber 11 is provided with an air inlet 12, which is connected to the air duct of the spinning machine; the left and right sides of the cotton suction chamber 11 are provided with side doors 13, which can be opened to inspect the inside of the cotton suction chamber 11 or remove cotton impurities.

[0062] like Figure 2 As shown, the suction chamber 11 is equipped with a blower 2, and a rotatable and swingable filter cylinder 4 is installed on the front side of the blower 2. Cleaning devices 5 that can swing independently are installed on the left and right sides in front of the filter cylinder 4. A fan 3 is connected to the rear side of the blower 2, and the fan 3 is located in the fan chamber 15. The swing drive mechanism of the filter cylinder 4 is installed in the equipment chamber 17, and electrical control equipment (not shown in the figure) can also be installed therein.

[0063] The cotton suction box of this utility model first designs a filter cylinder assembly consisting of an air duct 2 and a filter screen cylinder 4, such as... Figure 3 As shown, further details can be found by referring to... Figure 4 , Figure 5 .

[0064] Ventilation duct 2, the specific structure is as follows Figure 4 As shown, a cylindrical body 21 is provided, which is arc-shaped. An air inlet 22 is provided on the front side, preferably a rectangular opening. A rear sealing plate 23 is provided on the rear side of the cylindrical body 21. An air outlet 24 is provided in the middle of the rear sealing plate 23. The air outlet 24 is opened according to the size and shape of the air inlet of the fan 3 and is directly connected to the air inlet of the fan 3. A bottom plate 25 is provided on the top and bottom of the cylindrical body 21, and a rotating shaft seat 26 is provided on the bottom plate 25.

[0065] Filter cylinder 4, the specific structure is as follows Figure 5 As shown, a filter screen 41 is provided. The filter screen 41 is generally made of metal mesh with a mesh size of 200 or higher. The filter screen 41 is arc-shaped, and the arc matches the arc of the cylinder 21. Preferably, the filter screen 41 and the arc of the cylinder 21 are coaxially arranged. The filter screen 41 can rotate and swing coaxially relative to the cylinder 21. The inner arc surface of the filter screen 41 is always in contact with the arc surface of the cylinder 21, especially in contact with the arc surface around the air inlet 22 of the cylinder 21.

[0066] Further reference Figure 7 The included angle of the horizontal projection surface at the air inlet 22 on the cylinder 21 is a; the included angle of the horizontal projection surface of the filter screen 41 is b; and the included angle of the horizontal projection surface of the cylinder 21 as a whole is c.

[0067] The curvature of the cylinder 21 must be greater than the curvature of the air inlet 22, i.e., a <c。

[0068] The curvature of filter 41 should be approximately equal to or preferably slightly greater than twice the curvature of air vent 22, i.e., b ≥ 2a.

[0069] In theory, the inner arc surface of the filter screen 41 only needs to be attached to the arc surface around the air inlet 22; that is, the arc angle c of the cylinder 21 itself only needs to be slightly greater than a, so as to provide arc-shaped guidance, support and sealing for the air inlet 22. Arc-shaped guide rails can be installed on the upper and lower sides of the box 1 wall to provide guidance and support for the rotation and swing of the filter screen 41.

[0070] However, in order to provide more comprehensive support for the filter screen 41, the included angle c of the cylinder 21 is generally slightly greater than 3a, that is, c≥3a.

[0071] The filter screen 41 is provided with connecting plates 42 at the top and bottom, which are welded to the top and bottom sides of the filter screen 41 and are located on the outside of the bottom plate 25 of the cylinder 21. In this way, the main body of the filter screen cylinder 4 wraps around a part of the cylinder 21 of the air duct 2 from the outside, especially always wrapping the air outlet 22 area.

[0072] In this embodiment, a=80°, b=162°, and c=240°, making the air vent 22 area sufficiently large.

[0073] A rotating shaft 43 is mounted at the arc-shaped center of the filter screen 41 in the filter cylinder 4. The rotating shaft 43 is preferably mounted on the rotating shaft seat 26 of the air duct 2 via a bearing seat, but it can also be mounted on the upper or lower wall of the housing 1. The rotating shaft 43 preferably extends upwards into the equipment cavity 17 and is connected to the swing drive mechanism of the filter cylinder. Alternatively, if the swing drive mechanism is located below the housing 1, the rotating shaft 43 can extend downwards. Furthermore, the swing drive mechanism can be installed inside the air duct 2, allowing the rotating shaft 43 to be directly connected to the swing drive mechanism inside the air duct 2.

[0074] The swing drive mechanism of this utility model adopts cylinder drive, such as... Figure 2 As shown, a swing arm 44 is fixedly connected to the rotating shaft 43. The swing arm 44 is hinged to the clamp 45. A filter cylinder drive cylinder 46 is provided. The top end of the piston rod 47 of the filter cylinder drive cylinder 46 is fixed to the clamp 45, and the tail end of the filter cylinder drive cylinder 46 is hinged to the mounting base. When the piston rod 47 of the filter cylinder drive cylinder 46 extends, it drives the swing arm 44 to drive the filter cylinder 4, especially the filter screen 41, to rotate and swing to the right through the rotating shaft 43. When the piston rod 47 of the filter cylinder drive cylinder 46 retracts, it drives the swing arm 44 to drive the filter screen 41 of the filter cylinder 4 to rotate and swing to the left through the rotating shaft 43. By reasonably selecting the length of the filter cylinder drive cylinder 46, especially the piston rod 47, and the length of the swing arm 44, it can be made so that when the piston rod 47 reaches its extension limit, the filter screen 41 is exactly at the right limit position (e.g., Figure 6 , Figure 7 (as shown in the diagram), and when the piston rod 47 is fully retracted, the filter screen 41 is exactly at its left extreme position (as shown in the diagram). Figure 9 (As shown in the diagram). Of course, the swing drive mechanism of this utility model can also be driven by drive components such as a geared motor. However, in this utility model, the filter screen 41 only needs to swing left and right at a certain angle, so a cylinder is chosen for drive, which results in faster drive response and speed, and relatively lower equipment manufacturing and maintenance costs.

[0075] The fan 3 is generally a centrifugal fan, with its inlet directly connected to the outlet 24 of the cylinder 21. The fan 3 can be directly fixed to the rear sealing plate 23 or installed on the frame of the housing 1. The fan 3 rotates at high speed, drawing air into the cotton suction chamber 11 through the air inlet 12, then through the filter screen 41 and the air outlet 22 into the rear chamber 112 inside the air duct 2, and then through the outlet 24 into the fan 3, finally exiting the housing 1. It can be further connected to a dust filtration device for deep filtration.

[0076] Cleaning device 5, such as Figure 2 , Figure 7 As shown, the cleaning device 5 is located on the left and right sides in front of the air vent 22. It includes a cleaning plate 51 with a cleaning end that can be controlled to contact or separate from the filter screen 41. A detachable cotton-removing device, such as a brush or scraper, is installed on the cleaning end of the cleaning plate 51. This cotton-removing device is vertically positioned, extending beyond the height range of the air vent 22, reaching the same height as the filter screen 41, or further exceeding the height range of the filter screen 41. The cleaning plate 51 is driven by a cleaning drive mechanism, allowing the cleaning end to be controlled to contact or separate from the filter screen 41. In this embodiment, one end of the cleaning plate 51 is hinged to the inner wall of the housing 1 via a hinge 52, and the other end of the cleaning plate 51 is connected to a cleaning drive cylinder 55. A connecting seat 53 is installed on the cleaning plate 51 and hinged to the front end of the piston rod 54 of the cleaning drive cylinder 55. The end of the cylinder body of the cleaning drive cylinder 55 is hinged to a mounting seat 56 on the inner side of the housing 1.

[0077] The cleaning device 5 primarily cleans the filter screen 41. When the piston rod 54 of the cleaning drive cylinder 55 extends in a controlled manner, it swings the cleaning plate 51 inward, causing the cleaning end to press against the filter screen 41. At this time, as the filter screen 41 rotates relative to the cleaning plate 51 to the other side, the cotton stripping device on the cleaning plate 51 can peel off the cotton fibers (CF) trapped on the filter screen 41 in a cotton blanket-like state, leaving them in the outer area of ​​the cleaning plate. When the piston rod 54 of the cleaning drive cylinder 55 retracts in a controlled manner, it drives the cleaning plate 51 to swing outward, separating it from the filter screen 41, allowing the filter screen 41 to pass through the area where the cleaning device 5 is located without obstruction.

[0078] The cleaning device 5 also serves as an isolation and sealing mechanism. Therefore, the cleaning plate 51 is preferably pressed against the upper and lower walls of the cotton suction chamber 11 inside the housing 1, and the filter screen 41 of the filter cylinder 4 is pressed against the upper and lower walls of the cotton suction chamber 11 inside the housing 1. Furthermore, the contact area between the cleaning plate 51 and the filter screen 41 is provided with an elastic sealing structure, such as an elastic cleaning scraper. The suction chamber 11 is divided into a front chamber and a rear chamber 112 by the cylinder 21 of the air duct 2. The cleaning devices 5 on both sides further divide the front chamber into a front chamber 111, a left chamber 113, and a right chamber 114. The cleaning devices 5 are controlled to swing, which can make the left chamber 113 connected to or isolated from the front chamber 111, and the right chamber 114 connected to or isolated from the front chamber 111. When the left chamber 113 or the right chamber 114 is isolated from the front chamber 111 by the cleaning device 5, the left chamber 113 or the right chamber 114 is in a static pressure state. At this time, opening the side door 13 on the corresponding side will not affect the airflow pressure in the front chamber 111.

[0079] When the cotton suction box of this utility model is working, such as Figure 6 , Figure 7 As shown, the side doors 13 on both sides are generally closed, making the inside of the cotton suction chamber 11 sealed. When the fan 3 is turned on and working, air enters the air duct from the outside of the spinning machine, and then is drawn into the front chamber 111 of the cotton suction chamber 11 through the air inlet 12. After passing through the filter screen 41 and the air outlet 22, it enters the rear chamber 112 inside the air duct 2, and then enters the fan 3 through the air outlet 24, and finally is discharged from the housing 1.

[0080] like Figure 6 , Figure 7 As shown, the filter cylinder 4 is located in the right-side area. The left mesh surface 413 of the filter 41 is a cleaning filter, located in the air vent 22 area, which shields the air vent 22. The right mesh surface 414 of the filter 41 is on the outside and does not participate in filtration.

[0081] During this process, the cleaning device 5 may or may not come into contact with the filter 41.

[0082] During this process, the cotton fibers generated during spinning will enter the cotton suction box of this invention with the air. However, when passing through the left mesh surface 413 of the filter screen 41, most of them will be trapped by the filter screen 41, and only the filtered air can continue to move backward through the air outlet 22.

[0083] As cotton fibers remain on filter screen 41, they will gradually clog the mesh of filter screen 41, causing the air pressure to decrease. When the air pressure decreases to the lower threshold, the filter screen cylinder 4 needs to be rotated in time to replace it with a clean filter screen 41.

[0084] That is, Figure 8As shown, when the left mesh surface 413 of the filter screen 41 becomes clogged after a period of use, the right mesh surface 414 of the filter screen 41 needs to be replaced. At this time, (1) the right drive cylinder 554 drives the right cleaning plate 514 to extend, so that the cotton stripping device of the right cleaning plate 514 abuts against the filter screen 41; (2) while the left drive cylinder 553 drives the left cleaning plate 513 to retract and move away from the filter screen 41; (3) the filter screen cylinder drive cylinder 46 drives the filter screen 41 to rotate to the left. During this process, the cotton fibers / CF on the right mesh surface 414 (which were trapped during the last filtration using the right mesh surface 414) will be scraped off by the cotton stripping device of the right cleaning plate 514 and left in the right cavity 114. The cleaned right mesh surface 414 will gradually move into the air vent 22 area and block the air vent 22 until the cleaned right mesh surface 414 is completely turned to the middle, i.e., the air vent 22 area. Meanwhile, the left mesh surface 413 will gradually move away from the air vent 22 area and move into the left cavity 113 without obstruction, carrying the cotton fibers / CF that were just trapped by filtration.

[0085] After the filter screen 41 is rotated into position, the preferred left drive cylinder 553 drives the left cleaning plate 513 to extend and press against the filter screen 41, isolating the left cavity 113 from the front cavity 111. The right mesh surface 414 continues to filter and retain cotton fibers / CF. Figure 9 As shown.

[0086] Preferably, the filter screen 41 has limiting strips at both ends, namely a left limiting strip 411 and a right limiting strip 412; preferably, the limiting strip is a single strip running from top to bottom, which, in conjunction with the elastic sealing structure of the cleaning plate 51, can achieve a more reliable seal. Thus, in such... Figure 9 When the state shown is reached, the right door 134 can be opened to remove the cotton fibers / CF scraped off by the cotton stripping device of the right cleaning plate 514. During this process, because the right cleaning plate 514 reliably seals the right cavity 114 and the front cavity 111, it will not affect the air pressure.

[0087] When the right mesh surface 414 has been in operation for a period of time and has trapped enough cotton fibers / CF to reduce the wind pressure, the left mesh surface 413 can then be replaced. Figure 10As shown: (1) The left drive cylinder 553 drives the left cleaning plate 513 to extend, so that the cotton stripping device of the left cleaning plate 513 abuts against the filter screen 41, mainly against the left mesh surface 413; (2) The right drive cylinder 554 drives the right cleaning plate 514 to retract and move away from the filter screen 41; (3) The filter screen cylinder drive cylinder 46 drives the filter screen 41 to rotate to the right; During this process, the cotton fibers / CF on the left mesh surface 413 will be scraped off by the cotton stripping device of the left cleaning plate 513 and left in the left cavity 113, while the cleaned left mesh surface 413 gradually turns into the air outlet 22 area, blocking the air outlet 22, until the cleaned left mesh surface 413 is completely turned to the middle, that is, the air outlet 22 area; while the right mesh surface 414 gradually turns away from the air outlet 22 area during this process, and carries the cotton fibers / CF that have just been filtered and intercepted into the right cavity 114 without obstruction.

[0088] The suction box of this invention can use the left screen 413 and right screen 414 of the filter 41 alternately in a cyclical manner. During the rotation process, it automatically cleans the cotton fibers / CF trapped on the filter screen, resulting in a clean and usable filter screen surface. The static pressure chambers on both sides (left chamber 113 and right chamber 114) are also large enough to accommodate the cotton fibers / CF scraped off multiple times. The worker only needs to open the side door 13 at intervals to remove the cotton fibers from the static pressure chamber.

[0089] The suction box of this invention can rotate the filter screen 41 according to the decrease in air pressure, that is, the positions of the left screen 413 and the right screen 414 are switched. It can also be rotated and switched at regular intervals, so that the filter screen 41 located in the front cavity 111 and shielded in the air outlet 22 area can maintain sufficient cleanliness, reduce the impact on negative pressure airflow parameters such as air pressure, air volume, and air velocity, and ensure that the spinning machine always obtains a stable and reliable working airflow.

[0090] This invention further applies the aforementioned cotton suction box to a high-density spinning machine. The cotton suction box is installed at one end of the high-density spinning machine. The dust suction duct of the high-density spinning machine is connected to the air inlet 12, while the connecting air pipe of the high-density spinning assembly is connected to the dust suction duct. This results in a stable negative pressure being formed in the cavity of the high-density spinning assembly, which in turn generates a reliable negative pressure on the high-density spinning assembly to strongly concentrate the yarn, thereby obtaining reliable, stable, and strong yarn strength.

[0091] The preferred embodiments of this utility model have been described in detail above, but this utility model is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this utility model, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A cotton suction box, characterized in that, It is equipped with a box, with a cotton suction chamber on the front and a fan chamber on the rear; The front end of the cotton suction chamber is equipped with an air inlet; the left and right sides of the cotton suction chamber are equipped with openable side doors. A blower is installed inside the suction chamber near the blower chamber; a blower is connected to the rear side of the blower and is located inside the blower chamber. A rotatable and swingable filter cylinder is installed on the front side of the air duct, and independently swingable cleaning devices are installed on the left and right sides of the front of the cotton suction chamber. The air duct has a cylindrical body with an arc-shaped section. An air inlet is located on the front side of the cylindrical body within the arc-shaped section. A rear sealing plate is provided on the rear side of the cylindrical body, with an air outlet in the middle of the rear sealing plate, which is connected to the air inlet of the fan. The cylindrical body has bottom plates at the top and bottom. The filter cylinder is equipped with a filter screen, which is arc-shaped and its curvature matches that of the cylinder body. The filter screen can rotate and swing relative to the cylinder body, and its inner arc surface always adheres to the arc surface of the cylinder body. The filter screen is connected to the filter screen cylinder swing drive mechanism; the filter screen is divided into two parts along the left and right sides, namely the left screen surface and the right screen surface; under the drive of the filter screen cylinder swing drive mechanism, the left screen surface and the right screen surface alternately block the air passage area of ​​the air duct. The cleaning devices are located on the left and right sides in front of the air vent; The cleaning device includes a cleaning plate with a cleaning end, and the cleaning plate is connected to a cleaning drive device; under the drive of the cleaning drive device, the cleaning end of the cleaning plate contacts or separates from the filter screen.

2. The cotton suction box as described in claim 1, characterized in that, The curvature axis of the cylinder is coaxial with the curvature axis of the filter screen; The included angle of curvature of the air inlet on the cylinder within the horizontal projection plane is α; The angle between the arcs of the filter screen and the horizontal projection plane is b; The arc angle between the curved section of the cylinder and the horizontal projection plane is c; c>a, b≥2a.

3. The cotton suction box as described in claim 2, characterized in that, c≥3a; The filter screen is always located on the outside of the arc-shaped section of the cylinder.

4. The cotton suction box as described in claim 1, characterized in that, The filter screen of the filter cylinder is equipped with connecting plates at the top and bottom, which are welded to the top and bottom sides of the filter screen; The connecting plates on the upper and lower sides of the filter screen cylinder are located on the outer side of the bottom plates on the upper and lower sides of the air duct; The filter screen of the filter cylinder has a rotating shaft installed at the arc-shaped center. The rotating shaft is installed on the upper and lower base plates of the air duct through bearing seats, or the rotating shaft is installed on the upper and lower walls of the housing through bearing seats. The rotating shaft is connected to the filter cylinder swing drive mechanism.

5. The cotton suction box as described in claim 4, characterized in that, The rotating shaft extends upwards or downwards, passing through the cotton suction chamber; the filter cylinder swing drive mechanism is located outside the cotton suction chamber. A swing arm is fixedly connected to the rotating shaft, and the swing arm is hinged to the end of the piston rod of the filter cylinder drive cylinder; The tail end of the filter cylinder drive cylinder is hinged to the mounting base.

6. The cotton suction box as described in claim 1, characterized in that, One end of the cleaning plate of the cleaning device is hinged to the inner wall of the box via a hinge; The other end of the cleaning plate is hinged to the front end of the piston rod of the cleaning drive cylinder; The end of the cylinder body of the cleaning drive cylinder is hinged to the mounting seat on the inner side of the housing. The cleaning drive cylinder is located on the outside of the cleaning plate.

7. The cotton suction box as described in claim 1 or 6, characterized in that, The cleaning end of the cleaning plate has a detachable and replaceable cotton stripping device.

8. The cotton suction box as described in claim 1 or 6, characterized in that, The cleaning plate of the cleaning device rests against the upper and lower walls of the cotton suction chamber inside the box. The filter screen of the filter cylinder rests against the upper and lower walls of the inner side of the cotton suction chamber; The contact area between the cleaning plate and the filter screen is equipped with a sealing structure.

9. The cotton suction box as described in claim 8, characterized in that, Limiting strips are provided at both ends of the filter screen; The limit strips are set from top to bottom and cooperate with the sealing structure of the cleaning plate.

10. A high-polymer spinning machine, characterized in that, The cotton suction box as described in any one of claims 1-9 is installed at one end of the high-density spinning machine, the dust suction duct of the high-density spinning machine is connected to the air inlet of the cotton suction box, and the connecting air pipe of the high-density spinning assembly is connected to the fan inside the cotton suction box through the dust suction duct and the cotton suction box.

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