Laying structure of a single-doffer card

Abstract

This invention discloses the web output structure of a single-doffer carding machine, which includes a doffer roller, a cohesive roller, an output roller, an output curtain, and a negative pressure adsorption unit. This invention utilizes the traction guidance and stable pressure cooperation of the first and second adsorption components to construct a dual guarantee of tangential traction and normal compression. It uses negative pressure to overcome adhesion and initiate the web, while normal pressure ensures tight adhesion to the output roller at high speed, preventing swaying and vibration, achieving single-pass transfer, reducing fiber damage and tension fluctuations, minimizing clouding and unevenness, and achieving high-speed, precise transmission. Simultaneously, a gradually decreasing negative pressure is formed based on a diverter plate, solving the problems of web rebound, offset, and peeling interference caused by instantaneous negative pressure, eliminating fly waste and dead-angle accumulation, and eliminating the risk of damage from hardened lumps. Furthermore, the synergy between single cohesion and single-pass transfer ensures fiber integrity and web purity, improves the equipment's adaptability to different web weights, and establishes the carding machine's technical advantages of high efficiency, stability, and high quality during ultra-high-speed operation.

Description

Technical Field

[0001] This invention belongs to the field of carding machine technology, specifically relating to the netting structure of a single-doff carding machine. Background Technology

[0002] A carding machine is a textile machinery used to process fibers. Its working principle is to open and remove impurities from pre-processed fiber raw materials, and to card block fibers into bundles and single fibers to form a thin layer of mesh fibers.

[0003] In traditional carding machines, after the fibers are combed and impurities removed, the cotton web is transferred from the cylinder to the doffer. After passing through the condensing roller, it is condensed into a web and then transferred twice by the transfer roller and the exit roller to the output curtain to complete the web exiting process. The web exiting process uses negative pressure adsorption for stripping; once the web reaches the horizontal transmission surface of the output curtain, the negative pressure disappears, and the friction generated by the horizontal transmission surface drives the web to exit synchronously. However, the following technical defects still exist in the actual web exiting operation: 1) Two transfers are required. Not only does the transfer increase the risk of fiber damage and energy loss due to multiple junctions, but it also easily causes tension fluctuations and positional shifts in the cotton web in the middle stage. This shift will manifest macroscopically as uneven thickness of the cotton web, forming cloud spots or severe unevenness, which directly affects the quality of the cotton web. 2) When the negative pressure disappears instantly, the cotton web will rebound or be pulled, which will not only cause accumulation and interference during web stripping, but also increase the probability of relative web drift or deviation, thus significantly affecting the quality and efficiency of the output web. At the same time, the cotton web may also collapse or break in some places. Therefore, the uniformity and stability of the output web are insufficient, and it cannot meet the output web requirements of the carding machine at high speed. Moreover, during high-speed operation, the detached short fibers and dust are easy to accumulate in these dead corners, forming hard lumps. These hard lumps will periodically damage the surface of the cotton web, causing periodic defects. At the same time, the accumulated fly ash may fall off and mix back into the cotton web, reducing the utilization rate of raw materials and contaminating the product. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an improved screen output structure for a single-doff carding machine.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A screen output structure for a single-doff carding machine includes a doffer roller, a coagulating roller, a screen output roller, an output curtain, and a negative pressure adsorption unit. The input end of the output curtain is sleeved around the outer periphery of the output roller. The output roller is a hollow, circumferentially formed negative pressure roller with adsorption holes. The negative pressure adsorption unit communicates with the inner cavity of the output roller and generates a stripping force through the output curtain. The portion of the output roller that adheres to the output curtain is the stripping section, and the remaining portion is the adsorption section. The negative pressure adsorption unit includes a negative pressure cavity formed by the input end of the output curtain and the output roller, with the adsorption port directly facing the adsorption... The section includes a first adsorption component, a second adsorption component whose adsorption port is attached to the lower outer wall of the inlet end and communicates with the negative pressure chamber, and a diversion plate located in the negative pressure chamber and supported on the upper inner wall of the inlet end. The adsorption port and the adsorption inlet have intersecting penetration directions. Multiple diversion holes are formed on the diversion plate, and the aperture of the multiple diversion holes gradually decreases along the transmission direction of the upper layer of the inlet end. Based on the negative pressure adsorption cooperation of the first and second adsorption components in different directions, a stripping force covering the adsorption section is formed and a gradually decreasing negative pressure adsorption force is formed by covering the diversion plate through the upper layer of the inlet end.

[0006] In short, the adsorption provided by the first adsorption component is mainly traction and guidance. After the cotton web leaves the condensing roller, it provides a clear tangential traction force pointing towards the output path. This force helps overcome the adhesion between the cotton web and the roller surface and its own inertia, initiating and guiding the cotton web to move in the correct direction. In principle, this negative pressure alone is sufficient for peeling. However, to solve the technical problems involved in the background technology, not only is a second adsorption component provided, but a diverter plate is also added. The adsorption provided by the second adsorption component is mainly compression and stabilization. After cooperating with the first adsorption component, it generates a strong normal pressure that presses the cotton web onto the exit roller. This force ensures that the cotton web remains tightly adhered during movement and will not float, shake, or detach due to centrifugal force, gravity, or airflow disturbance (i.e., the two sets of negative pressure not only enhance the normal pressure but also increase the static friction, allowing the cotton web to be more tightly adhered just before being pulled away by the exit roller). The more stable adhesion of the output curtain at the inlet end prevents the cotton web from drifting or partially remaining due to insufficient adhesion. Furthermore, the cotton web is taut at the moment of peeling, which helps maintain the integrity of the fiber structure. It also exhibits strong adaptability to high-speed operation and different cotton web weights, with a more fixed peeling point. The gradually changing negative pressure formed by the diverter plate avoids rebound or bounce caused by the sudden disappearance of negative pressure, and also reduces the impact of the sudden loss of negative pressure on the peeling of the cotton web. In addition, the use of single-cohesion followed by direct transfer of the web (single transfer), and the negative pressure formed at the web exit to assist fiber web formation, not only reduces the risk of fiber damage, but also results in small tension fluctuations and low positional deviation rates in the intermediate stages of the cotton web, solving problems such as cloudiness or severe unevenness. Furthermore, single transfer is more conducive to high-speed web exit of the carding machine, reducing the accumulation and agglomeration of short fibers and dust in these dead corners, meeting the requirements of continuity and uniformity in high-quality nonwoven fabric or yarn production.

[0007] Preferably, the adsorption port consists of multiple adsorption pores, and the adsorption end face formed by the multiple adsorption pores covers the entire adsorption section. This porous structure ensures comprehensive adsorption, preventing uneven stripping force that could affect the quality of the finished product.

[0008] Furthermore, the adsorption holes at the adsorption port are elongated holes extending along the length of the exit roller, and are arranged side-by-side and staggered or in an array to form the adsorption end face. Based on the spaced and staggered or arrayed layout, a relatively balanced wide coverage can be formed. As the width of the cotton web (4.2 meters or 4.6 meters) increases, the peeling force and adsorption transmission traction force formed become more balanced, avoiding mutual pulling and restraint.

[0009] Preferably, the adsorption port is directly opposite the diverter plate and located between the adsorption section and the adsorption port. Furthermore, the penetration direction of the adsorption port and the adsorption inlet is perpendicular. Based on the layout of the adsorption port position and the planning of the adsorption direction, the adsorption direction formed by the second adsorption component and the adsorption direction formed by the first adsorption component can be effectively combined. This not only strengthens the stripping and transfer force in multiple directions formed by the stripping section, but also effectively covers the negative pressure cavity, maintaining the forward transmission of the cotton web under the gradually decreasing negative pressure adsorption formed by the diverter plate.

[0010] In some specific embodiments, the adsorption port consists of multiple adsorption pores, and the adsorption area formed by the multiple adsorption pores covers the area between the adsorption section and the adsorption port. Because the suction force formed by this coverage is relatively uniform, it is more conducive to achieving a gradual decrease in the negative pressure adsorption force formed through the upper layer at the inlet end.

[0011] Preferably, the adsorption holes at the adsorption port are elongated holes extending along the length of the output roller, and are arranged side-by-side and staggered or in an array to form the adsorption end face. The design here uses elongated holes with a limited direction of extension, primarily to transform discrete point-like suction into continuous linear / area-like suction. This design directly solves problems such as unevenness in the transverse direction of the cotton web, edge drift, and large airflow impact caused by traditional point-like suction holes. It is also a key structural feature for achieving high-speed, high-stability, and high-quality output of the cotton web, perfectly meeting the technical requirements of gradual negative pressure and multi-directional combined force.

[0012] According to a specific embodiment and preferred aspect of the present invention, each component flow orifice is composed of multiple suction holes with the same pore size, and the multiple suction holes are spaced apart along the width direction of the flow divider. Here, based on the multiple component flow orifices with the same pore size and equal spacing, the corresponding sections maintain the same negative pressure, avoiding adsorption and pulling between adjacent groups or adjacent flow dividers, and improving the quality of the output wire.

[0013] According to a specific embodiment and preferred aspect of the present invention, the first adsorption assembly includes a first square tube with its top and / or bottom surfaces supported on the inner wall of the output curtain, first end heads formed at both ends of the first square tube and protruding outwards from the outer side of the output curtain, and a first negative pressure pump. The two first end heads are connected to the air intake of the first negative pressure pump via pipelines, and an adsorption port is formed on the side of the first square tube facing the adsorption section. Based on the simultaneous suction from both ends to create negative pressure, excessive frictional resistance is avoided due to the excessively long flow path inside the first square tube, thus preventing uneven distribution of negative pressure along the axial direction of the square tube (or insufficient suction at the distal end).

[0014] Preferably, one end of the diverter plate is fixedly connected to the top of the adsorption end face of the first square tube, and the other end is attached to the top of the adsorption section. A flow equalization plate is also arranged directly below the diverter plate, wherein flow equalization holes are formed on the flow equalization plate, and one end of the flow equalization plate is fixedly connected to the bottom of the adsorption end face of the first square tube, and the other end is attached to the bottom of the adsorption section. The adsorption section, diverter plate, flow equalization plate, adsorption end face, and sealing plate constitute a closed negative pressure cavity, with the lower layer of the inlet web passing between the flow equalization plate and the second adsorption assembly. The diverter plate and flow equalization plate not only form part of the negative pressure cavity but also provide relative support to the inner walls of the upper and lower layers of the inlet web, thereby significantly reducing the shaking of the upper and lower layers of the inlet web (unaffected by changes in negative pressure). Furthermore, the top diverter plate achieves a gradually decreasing adsorption force, allowing the cotton web to gradually loosen and become fluffy, avoiding the cotton web rebound or bounce caused by the sudden disappearance of negative pressure.

[0015] In some specific embodiments, the first square tube is supported from the top surface on the inner wall of the upper layer of the output curtain, and the diverter plate is fixedly connected to the top of the first square tube; the bottom of the first square tube is supported on the inner wall of the lower layer of the output curtain based on the frame, and the first square tube is fixedly connected to the flow equalization plate based on the connecting plate, wherein the connecting plate extends downward at an angle to form a chamfer, and the flow equalization plate, the connecting plate, the adsorption section, the diverter plate, and the adsorption end face of the first square tube constitute the negative pressure cavity. This structural layout not only effectively supports the output curtain internally, but also facilitates the formation of the negative pressure cavity. Furthermore, the connecting plate not only reduces the volume of the first square tube, but the chamfer formed also facilitates the cooperation of the two negative pressure flows to eliminate turbulence generated at the corner.

[0016] Preferably, the second adsorption component includes a second square tube with the adsorption port facing upwards and a second negative pressure pump, wherein the inner cavity of the second square tube is connected to the air intake of the second negative pressure pump through a pipeline from the side adjacent to the adsorption port. Based on the side suction method, the highest local adsorption efficiency and the simplest pipeline structure are obtained by using the shortest airflow path. It also makes up for the problem of insufficient end suction that may be caused by relying solely on long pipe transmission. It is particularly suitable for key workstations that require precise, strong, and rapid adsorption and peeling of cotton webs. It complements the uniform coverage of the first adsorption component and together they form a stable and efficient negative pressure system for web exit.

[0017] Specifically, the second square tube has equally spaced channel tubes distributed on its side. The second adsorption component also includes a third tube parallel to the second square tube and second ends formed at both ends of the third tube. The third tube has connecting tubes on its side facing the second square tube, corresponding to and connected to the channel tubes. The suction port of the second negative pressure pump is connected to the two second ends via pipes. Based on the lateral connection and end suction of the third tube, a short-path, low-resistance, and balanced high-efficiency negative pressure collection structure is constructed. Specifically, the short-path advantage of the channel tubes / connecting tubes (similar to the high efficiency of side suction); the uniformity advantage of the double-end connection (eliminating end suction attenuation); and the spatial flexibility of the parallel layout, that is, without increasing the cost of complex piping, the second adsorption component can provide stable, uniform, and strong adsorption force across the entire width of the cotton web, just like the first adsorption component, perfectly supporting the precise peeling and smooth transmission of the cotton web.

[0018] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: In existing single-doff carding machines, the web exiting process requires two transfers. These transfers not only increase the risk of fiber damage due to multiple contact points and result in significant energy loss, but also easily cause tension fluctuations and positional shifts in the web during these intermediate stages. This shift manifests macroscopically as uneven web thickness, forming cloudiness or severe unevenness, directly affecting web quality. Furthermore, when the negative pressure disappears instantaneously, the web experiences a momentary rebound or stretching, causing not only accumulation and interference during web stripping but also increasing the probability of relative web drift or shifting, thus significantly impacting the quality and efficiency of the exiting web. Simultaneously, the web may experience localized collapse or breakage. Therefore, the uniformity and stability of the exiting web are insufficient and cannot meet the requirements of carding machines. The high-speed operation of the cotton web presents challenges, particularly the accumulation of short fibers and dust in dead corners during high-speed operation, which can periodically damage the surface of the cotton web and cause periodic defects. Furthermore, accumulated fly ash may detach and re-enter the cotton web, reducing raw material utilization and contaminating the product. This invention, based on the overall design of the single-doffer carding machine's web exit structure, cleverly solves these shortcomings. With this single-doffer carding machine's web exit structure, the carded fibers first pass sequentially through the doffer and a single cohesive roller to form stretching and compression copolymerization. Then, the copolymerized fibers are directly peeled off by the negative pressure adsorption cooperation of the first and second adsorption components in different directions, forming a peeling force covering the adsorption section. The process involves stripping and transferring segments to form a cotton web. Finally, based on the covering and diverting plate formed within the negative pressure chamber, a gradually decreasing negative pressure adsorption force is created through the upper layer at the web inlet end for follow-up adsorption and transfer, until the cotton web is stress-free and synchronously transferred with the output curtain to complete the web exit. Therefore, this invention, on the one hand, constructs a dual guarantee mechanism of tangential traction and normal compression based on the traction guidance and stable pressing cooperation of the first and second adsorption components. This not only utilizes negative pressure to overcome adhesion and guide the cotton web along the correct path, but also ensures that the normal pressure keeps the cotton web tightly attached to the exit roller at high speed, effectively preventing it from floating, shaking, or stagnating before peeling. Simultaneously, a single transfer significantly reduces the risk of fiber damage and tension waves in the intermediate stages. The dynamic process significantly reduces quality defects such as cloudiness and unevenness, achieving precise transmission at high speeds. On the other hand, the gradual and decreasing negative pressure formed by the diverter plate not only solves the problems of cotton web rebound, drift, offset, pulling, and peeling interference caused by the instantaneous disappearance of negative pressure, but also eliminates the phenomenon of periodic accumulation of fly waste and fibers in dead corners. It also eliminates the risk of periodic pressure damage to the cotton web and secondary contamination caused by hard lumps. In addition, the deep synergy between single cohesion and single transfer not only ensures the integrity of the fiber structure and the purity of the web, but also significantly improves the adaptability of the equipment to different quantitative cotton webs, establishing the technical advantages of the carding machine in high-speed operation with high efficiency, stability, and high quality. Attached Figure Description

[0019] Figure 1This is a schematic diagram of the netting structure of the single-doff carding machine in this embodiment; Figure 2 for Figure 1 Front view diagram; Figure 3 for Figure 2 A top-down view; Figure 4 for Figure 3 Schematic diagram of the sectional view along the central AA direction; Figure 5 for Figure 1 A schematic diagram of the local structural decomposition; Figure 6 for Figure 5 Enlarged schematic diagram of the structure of the first square tube in the middle; Figure 7 for Figure 5 Enlarged schematic diagram of the structure at point B; The components are as follows: 1. Doffer roller; 2. Coagulation roller; 3. Screen exit roller; 30. Peeling section; 31. Adsorption section; 4. Output curtain; 40. Horizontal output section; 41. Downward inclined transfer section; 5. Negative pressure adsorption unit; 51. First adsorption assembly; 511. First square tube; 512. First end; x1. Adsorption port; x10, x20. Adsorption holes; 513. Connecting plate; 52. Second adsorption assembly; 522. Second square tube; 523. Third square tube; 524. Second end; t. Channel tube; s. Connecting tube; x2. Adsorption port; 53. Diverter plate; 530. Diverter hole; x3. Suction hole; 54. Flow equalization plate; 540. Flow equalization hole; 55. Sealing plate. Detailed Implementation

[0020] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings. The orientations or positional relationships indicated by terms such as "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description. They are not intended to 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 limiting this application.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0022] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0023] In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of a second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" a second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or there may be an intermediate element present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element present. The terms "vertical," "horizontal," "above," "below," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.

[0024] like Figures 1 to 7 As shown, the screen output structure of the single doffer carding machine in this embodiment includes a doffer roller 1, a coagulating roller 2, a screen output roller 3, an output curtain 4, and a negative pressure adsorption unit 5.

[0025] Specifically, the doffer roller 1 is connected to the discharge end of the carding machine, and the coagulation roller 2 and the doffer roller 1 form a coagulation, which bypasses the coagulation roller 2 and directly enters the web outlet. At this time, the fibers are stripped and transferred by the negative pressure adsorption unit 5 to form a cotton web and then output horizontally with the output curtain 4 to complete the entire fiber web outlet process.

[0026] In some specific embodiments, the output roller 3 is a negative pressure roller with a hollow interior and circumferentially formed adsorption holes. The output curtain 4 includes a horizontal output section 40 and a downward inclined transfer section 41. The inlet end of the horizontal output section 40 is sleeved on the outer periphery of the output roller 3, and the end of the output roller 3 that is in contact with the inlet end is divided into a peeling section 30 and the remaining part is an adsorption section 31. The negative pressure adsorption unit 5 is connected to the inner cavity of the output roller 3 and forms a peeling force through the inlet end.

[0027] In this example, the negative pressure adsorption unit 5 includes a first adsorption component 51 that forms a negative pressure cavity with the inlet end of the output curtain 4 and the outlet roller 3 and whose adsorption port is directly opposite the adsorption section 31; a second adsorption component 52 that is attached to the lower outer wall of the inlet end and communicates with the negative pressure cavity; and a diversion plate 53 located in the negative pressure cavity and supported on the upper inner wall of the inlet end. The through directions of the adsorption port and the adsorption outlet intersect. A multi-component diversion hole 530 is formed on the diversion plate 53, and the aperture of the multi-component diversion hole 530 gradually decreases along the transmission direction of the upper layer of the inlet end. Based on the negative pressure adsorption cooperation of the first and second adsorption components in different directions, a stripping force covering the adsorption section 31 and a gradually decreasing negative pressure adsorption force covering the diversion plate 53 are formed through the upper layer of the inlet end.

[0028] In short, the adsorption provided by the first adsorption component 51 is mainly traction and guidance. After the cotton web leaves the coagulating roller, it provides a clear tangential traction force pointing towards the output path. This force helps overcome the adhesion between the cotton web and the roller surface and its own inertia, initiating and guiding the cotton web to move in the correct direction. In principle, this negative pressure alone is sufficient for peeling. However, to solve the technical problems involved in the background art, not only is a second adsorption component 52 provided, but a diverter plate 53 is also added. The adsorption provided by the second adsorption component 52 is mainly compression and stabilization. After cooperating with the first adsorption component 51, it generates a strong normal pressure that presses the cotton web onto the output roller 3. This force ensures that the cotton web remains tightly attached during movement and will not float, shake, or detach due to centrifugal force, gravity, or airflow disturbance (i.e., the two sets of negative pressure not only enhance the normal pressure but also increase the static friction, allowing the cotton web to be pulled away by the output roller at the instant). The cotton web adheres more tightly and stably to the inlet end of the output curtain, avoiding the drifting or partial retention of the cotton web due to insufficient adhesion. Moreover, the cotton web is in a taut state at the moment of peeling, which helps maintain the integrity of the fiber structure. It is also highly adaptable to high-speed operation and different weights of cotton web, and the peeling point is more fixed. The gradually changing negative pressure formed by the diverter plate avoids the rebound or bounce caused by the instantaneous disappearance of negative pressure, and also reduces the impact of the instantaneous loss of negative pressure on the peeling of the cotton web. In addition, the single-cohesion and direct transfer of the web (single transfer) and the negative pressure formed by the web exit to assist fiber web formation not only reduce the risk of fiber damage, but also reduce the tension fluctuation and positional deviation rate of the cotton web in the intermediate stage, solving the problems of cloudiness or severe unevenness. Furthermore, the single transfer is more conducive to the high-speed web exit of the carding machine, reducing the accumulation and agglomeration of short fibers and dust in these dead corners, meeting the requirements of continuity and uniformity for high-quality nonwoven fabric or yarn production.

[0029] Specifically, the first adsorption component 51 includes a first square tube 511 with its top and / or bottom surfaces supported on the inner wall of the output curtain, first end caps 512 formed at both ends of the first square tube 511 and protruding out of the outer side of the output curtain, and a first negative pressure pump. The two first end caps 512 are connected to the air intake of the first negative pressure pump through a pipeline. An adsorption port x1 is formed on the side of the first square tube 511 facing the adsorption section 31. Based on the simultaneous suction from both ends to form a negative pressure, excessive friction resistance is avoided due to the excessively long flow path of the airflow inside the first square tube 511, which would otherwise lead to uneven distribution of negative pressure along the axial direction of the square tube (or insufficient suction at the far end). The adsorption port x1 is composed of multiple adsorption holes x10, and the adsorption end face formed by the multiple adsorption holes x10 covers the entire adsorption section 31. Based on the multi-pore formation of the adsorption coverage, the uneven peeling force is avoided, which affects the quality of the finished web. In this example, the adsorption holes x10 are elongated holes extending along the length of the web roller 3, and they are arranged side by side and staggered or in an array to form the adsorption end face. Based on the staggered or arrayed arrangement (in this example, every two rows of elongated holes are staggered and distributed in an array), a relatively balanced wide coverage can be formed. As the width of the cotton web (4.2 meters or 4.6 meters) increases, the peeling force and adsorption transmission traction force formed are more balanced, avoiding mutual pulling and restraint.

[0030] The second adsorption component 52 includes a second square tube 522 with the adsorption port x2 facing upward, a second negative pressure pump, a third third tube 523 arranged parallel to the second square tube 522, and second end caps 524 formed at both ends of the third third tube 523. Channel tubes t are distributed at equal intervals on the side of the second square tube 522, and connecting tubes s are arranged on the side of the third third tube 523 facing the second square tube 522, corresponding to and connected to the channel tubes t. The air intake of the second negative pressure pump is connected to the two second end caps 524 through a pipe. Based on the lateral connection and end suction of the third-party tube 523, a short-path, low-resistance, and balanced high-efficiency negative pressure collection structure was constructed. Specifically, the short path advantage brought by the channel tube / connecting tube (similar to the high efficiency of side suction); the uniformity advantage brought by the double-end connection (eliminating the attenuation of end suction); and the spatial flexibility brought by the parallel layout, that is, without increasing the cost of complex pipelines, the second adsorption component can provide stable, uniform, and strong adsorption force across the entire width of the cotton web, just like the first adsorption component, perfectly supporting the precise peeling and smooth transmission of the cotton web. In addition, based on the side suction method, the shortest airflow path is used to achieve the highest local adsorption efficiency and the simplest pipeline structure. It also makes up for the problem of insufficient end suction that may result from relying solely on long tube transmission. It is particularly suitable for critical workstations that require precise, strong, and rapid adsorption and peeling of the cotton web. It complements the uniform coverage of the first adsorption component and together they construct a stable and efficient negative pressure system for web exit.

[0031] In this example, the adsorption port x2 of the second square tube 522 faces the diversion plate 53 and is located between the adsorption section 31 and the adsorption port x1. Furthermore, the penetration directions of the adsorption port x1 and the adsorption port x2 are perpendicular. Based on the positional layout of the adsorption port x2 and the planned adsorption direction, the adsorption direction formed by the second adsorption component 52 and the adsorption direction formed by the first adsorption component 51 can be effectively combined. This not only strengthens the stripping and transfer force formed by the stripping section in multiple directions but also effectively covers the negative pressure cavity, maintaining the forward transmission of the cotton web under the gradually decreasing negative pressure adsorption formed by the diversion plate. The adsorption port x2 is composed of multiple adsorption holes x20, and the adsorption area formed by the multiple adsorption holes x20 covers the area between the adsorption section 31 and the adsorption port x1. The relatively uniform suction force formed by this coverage is more conducive to achieving a gradual decrease in the negative pressure adsorption force formed through the upper layer at the web entry end. Furthermore, the adsorption holes x20 are elongated holes extending along the length of the output roller, and are arranged side-by-side and staggered or in an array to form adsorption end faces (in this example, a side-by-side and staggered arrangement is used). The design here uses elongated holes, and the direction of extension is limited. Its main purpose is to transform discrete point-like suction force into continuous linear / area-like suction force. This design directly solves the problems of unevenness in the transverse direction of the cotton web, edge drift, and large airflow impact caused by traditional point-like suction holes. It is also a key structural feature for achieving high-speed, high-stability, and high-quality output of the cotton web, perfectly meeting the technical requirements of gradual negative pressure and multi-directional combined force.

[0032] In some specific embodiments, one end of the diverter plate 53 is fixedly connected to the top of the adsorption end face of the first square tube 511, and the other end is attached to the top of the adsorption section 31; each diverter hole 530 is composed of multiple suction holes x3 with the same aperture, and the multiple suction holes x3 are distributed at intervals along the width direction of the diverter plate 53. Here, based on the multi-group flow holes 530 with the same aperture and width and equal spacing, the corresponding sections maintain the same negative pressure, avoiding adsorption and pulling between adjacent groups or adjacent two flow holes 530, and improving the quality of the net. At the same time, a flow equalization plate 54 is arranged directly below the flow equalization plate 53, wherein flow equalization holes 540 are formed on the flow equalization plate 54, and one end of the flow equalization plate 54 is fixedly connected to the bottom of the adsorption end face of the first square tube 511, and the other end is attached to the bottom of the adsorption section 31. The adsorption section 31, the flow equalization plate 53, the flow equalization plate 54, the adsorption end face of the first square tube 511 and the sealing plate 55 constitute a closed negative pressure cavity, and the lower layer of the net enters through the flow equalization plate 54 and the second square tube 522. The diverting plate 53 and the equalizing plate 54 used not only form part of the negative pressure chamber, but also provide relative support to the inner walls of the upper and lower layers at the inlet end, thereby significantly reducing the swaying of the upper and lower layers at the inlet end (unaffected by changes in negative pressure); on the other hand, the diverting plate at the top achieves a gradually decreasing adsorption force, so that the cotton web gradually loosens and becomes fluffy, avoiding the cotton web rebound or bounce caused by the sudden disappearance of negative pressure. In this example, the first square tube 511 is supported from the top surface on the inner wall of the upper layer of the output curtain 4, and the diverting plate 53 is fixedly connected to the top of the first square tube 511; the bottom of the first square tube 511 is supported on the inner wall of the lower layer of the output curtain 4 based on the frame, and the first square tube 511 is fixedly connected to the equalizing plate 54 based on the connecting plate 513. The equalizing plate 54, the connecting plate 513, the adsorption section 31, the diverting plate 53, and the adsorption end face of the first square tube 511 constitute the negative pressure chamber. This structural layout not only effectively supports the output curtain, but also facilitates the formation of the negative pressure cavity. At the same time, it reduces the inner volume of the first square tube 511. Furthermore, with the inclined extension and docking of the connecting plate 513, it is more conducive to the cooperation of the two negative pressure flows, and also avoids turbulence at the corner.

[0033] In addition, the entire left side of the infeed end is subjected to negative pressure stripping, and the condensing roller is located on the upper side of the infeed end. Therefore, the design of the entire stripping section can more comprehensively complete the stripping of fibers on the condensing roller.

[0034] In summary, by adopting the web-out structure of this single-doffer carding machine, the carded fibers first pass through the doffer and single cohesive roller sequentially to form stretching and compression copolymerization; secondly, the copolymerized fibers are directly stripped and transferred by the stripping force of the covering adsorption section based on the negative pressure adsorption cooperation of the first and second adsorption components in different directions, forming a cotton web; finally, based on the covering diversion plate formed in the negative pressure chamber, the gradually decreasing negative pressure adsorption force is formed through the upper layer of the web inlet for follow-up adsorption and transfer, until the cotton web is transferred synchronously with the output curtain without stress in the thickness direction to complete the web exit. Therefore, this invention, on the one hand, constructs a dual guarantee mechanism of tangential traction and normal compression based on the traction guidance and pressure adhesion stability cooperation of the first and second adsorption components. Not only does it utilize negative pressure to overcome adhesion and guide the cotton web along the correct path, but the normal pressure ensures the web remains tightly adhered to the exit roller at high speeds, effectively preventing drifting, shaking, or pre-peeling stagnation. Simultaneously, single-pass transfer significantly reduces the risk of fiber damage and tension fluctuations in intermediate stages, substantially minimizing quality defects such as clouding and unevenness, achieving precise transmission at high speeds. Furthermore, the gradually decreasing negative pressure created by the diverter plate not only solves the problems of web rebound, drifting, offsetting, pulling, and peeling interference caused by the instantaneous disappearance of negative pressure, but also eliminates the periodic accumulation of fly waste and fibers in dead corners, while also eliminating the periodic pressure of hard lumps on the cotton web. This avoids the risk of secondary contamination. Furthermore, the deep synergy between single-coagulation and single-transfer not only ensures the integrity of the fiber structure and the purity of the web, but also significantly improves the equipment's adaptability to different quantities of cotton web, establishing the carding machine's technical advantages of high efficiency, stability, and high quality during ultra-high-speed operation. Thirdly, based on the layout of the adsorption port positions and the planning of the adsorption direction, the adsorption direction formed by the second adsorption component and the first adsorption component can be effectively combined. This not only strengthens the stripping and transfer force formed in multiple directions by the stripping section, but also effectively covers the negative pressure chamber, maintaining the forward transmission of the cotton web under the gradually decreasing negative pressure adsorption formed by the self-diverting plate. Simultaneously, the adsorption holes are elongated holes, and the extension direction of the elongated holes is... Limited by its design, the main purpose is to transform discrete point-like suction into continuous linear / area-like suction. This design directly solves the problems of unevenness in the cotton web, edge drift, and large airflow impact caused by traditional point-like suction holes. It is also a key structural feature for achieving high-speed, high-stability, and high-quality output of the cotton web, perfectly meeting the technical requirements of gradual negative pressure and multi-directional combined force. Fourthly, each group of flow holes consists of multiple suction holes with the same aperture, and these multiple suction holes are spaced apart along the width of the flow plate. Here, based on the multiple group flow holes with the same aperture and equal spacing, the corresponding sections maintain the same negative pressure, avoiding adsorption and pulling between adjacent groups or adjacent flow holes, thus improving the quality of the output web.Fifthly, by simultaneously drawing air from both ends to create negative pressure, excessive frictional resistance is avoided due to the long flow path inside the first square tube, which would lead to uneven distribution of negative pressure along the axial direction of the square tube (or insufficient suction at the far end). Simultaneously, the diverter plate and flow equalizer not only form part of the negative pressure chamber but also provide relative internal support to the upper and lower inner walls of the inlet end, significantly reducing the swaying of the upper and lower layers at the inlet end (unaffected by changes in negative pressure). Furthermore, the top diverter plate achieves gradually decreasing suction force, allowing the cotton web to gradually loosen and become fluffy, preventing the cotton web from rebounding or bounced due to the sudden disappearance of negative pressure. Sixthly, the connecting plate extends downwards at an angle, and the flow equalizer, connecting plate, suction section, diverter plate, and suction end face of the first square tube constitute the negative pressure chamber. This structural layout not only effectively supports the output curtain but also facilitates the formation of the negative pressure chamber. Furthermore, the connecting plate not only reduces the volume of the first square tube but also the chamfered shape is more conducive to the cooperation of the two negative pressure flows to eliminate... The system utilizes turbulence generated at corners; its side-suction method achieves the highest local adsorption efficiency and the simplest pipeline structure through the shortest airflow path. It also compensates for insufficient end-suction force that might result from relying solely on long pipes for transport. This makes it particularly suitable for critical workstations requiring precise, powerful, and rapid adsorption and stripping of the cotton web. Complementing the uniform coverage of the first adsorption component, it jointly constructs a stable and efficient negative pressure system for web exit. Furthermore, based on the lateral connection and end-suction of the third-party pipe, a short-path, low-resistance, and balanced high-efficiency negative pressure collection structure is constructed. Specifically, the short-path advantage of the channel pipe / connecting pipe (similar to the high efficiency of side-suction); the uniformity advantage of the double-end connection (eliminating end-suction force attenuation); and the spatial flexibility of the parallel layout—that is, without increasing the cost of complex pipelines, the second adsorption component can provide stable, uniform, and strong adsorption force across the entire width of the cotton web, just like the first adsorption component, perfectly supporting the precise stripping and smooth transport of the cotton web.

[0035] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A screen output structure for a single doffer carding machine, comprising a doffer roller, a coagulating roller, a screen output roller, an output curtain, and a negative pressure adsorption unit, wherein the input end of the output curtain is sleeved on the outer periphery of the screen output roller, the screen output roller is a hollow negative pressure roller with circumferentially formed adsorption holes, the negative pressure adsorption unit is connected to the inner cavity of the screen output roller and forms a peeling force through the output curtain, wherein the portion of the screen output roller that adheres to the output curtain is the peeling section, and the remaining portion is the adsorption section, characterized in that: The negative pressure adsorption unit includes a first adsorption component that forms a negative pressure cavity with the inlet end and outlet roller of the output screen and whose adsorption port is directly opposite the adsorption section; a second adsorption component whose adsorption port is attached to the lower outer wall of the inlet end and communicates with the negative pressure cavity; and a diversion plate located in the negative pressure cavity and supported on the upper inner wall of the inlet end. The adsorption port and the adsorption outlet have intersecting penetration directions. Multiple diversion holes are formed on the diversion plate, and the aperture of the multiple diversion holes gradually decreases along the upper transmission direction of the inlet end. The negative pressure adsorption cooperation of the first and second adsorption components in different directions forms a stripping force covering the adsorption section and a gradually decreasing negative pressure adsorption force covering the diversion plate to penetrate the upper layer of the inlet end.

2. The netting structure of the single-doff carding machine according to claim 1, characterized in that: The adsorption port consists of multiple adsorption pores, and the adsorption end face formed by the multiple adsorption pores covers the entire adsorption section.

3. The netting structure of the single-dough carding machine according to claim 2, characterized in that: The adsorption holes at the adsorption port are elongated holes extending along the length of the output roller, and are arranged side by side and staggered or in an array to form an adsorption end face.

4. The netting structure of the single-doff carding machine according to claim 1, characterized in that: The adsorption port is directly opposite the flow divider and is located between the adsorption section and the adsorption port; and / or, the penetration direction of the adsorption port and the adsorption inlet is perpendicular.

5. The netting structure of the single-dough carding machine according to claim 4, characterized in that: The adsorption port consists of multiple adsorption pores, and the adsorption area formed by the multiple adsorption pores covers the area between the adsorption section and the adsorption port.

6. The netting structure of the single-dough carding machine according to claim 5, characterized in that: The adsorption holes of the adsorption port are elongated holes extending along the length of the screen roller, and are arranged side by side and staggered or in an array to form an adsorption end face.

7. The netting structure of the single-doff carding machine according to claim 1, characterized in that: Each component flow orifice is composed of multiple suction holes of the same diameter, and these suction holes are spaced apart along the width of the flow divider.

8. The netting structure of the single-doff carding machine according to claim 1, characterized in that: The first adsorption component includes a first square tube with its top and / or bottom surfaces supported on the inner wall of the output curtain, first ends formed at both ends of the first square tube and protruding out of the outer side of the output curtain, and a first negative pressure pump. The two first ends are connected to the air intake of the first negative pressure pump through a pipeline, and an adsorption port is formed on the side of the first square tube facing the adsorption section.

9. The netting structure of the single-doff carding machine according to claim 8, characterized in that: One end of the flow divider is fixedly connected to the top of the adsorption end face of the first square tube, and the other end is attached to the top of the adsorption section. A flow equalization plate is also arranged directly below the flow divider, wherein flow equalization holes are formed on the flow equalization plate, and one end of the flow equalization plate is fixedly connected to the bottom of the adsorption end face of the first square tube, and the other end is attached to the bottom of the adsorption section. The adsorption section, the flow divider, the flow equalization plate, the adsorption end face and the sealing plate form a closed negative pressure cavity, and the lower layer of the inlet end passes through the flow equalization plate and the second adsorption component.

10. The netting structure of the single-dough carding machine according to claim 9, characterized in that: The first square tube is supported from the top surface on the inner wall of the upper layer of the output curtain, and the diverter plate is fixedly connected to the top of the first square tube; the bottom of the first square tube is supported on the inner wall of the lower layer of the output curtain based on the frame, and the first square tube is fixedly connected to the flow equalization plate based on the connecting plate, wherein the connecting plate is inclined downward to form a chamfer, and the flow equalization plate, the connecting plate, the adsorption section, the diverter plate, and the adsorption end face of the first square tube constitute the negative pressure cavity.

11. The netting structure of the single-doff carding machine according to claim 1, characterized in that: The second adsorption component includes a second square tube with the adsorption port facing upward and a second negative pressure pump, wherein the inner cavity of the second square tube is connected to the air intake of the second negative pressure pump through a pipeline from the side adjacent to the adsorption port.

12. The netting structure of the single-doff carding machine according to claim 11, characterized in that: The second adsorption component also includes a third tube arranged parallel to the second square tube and second ends formed at both ends of the third tube. The third tube has connecting pipes that correspond one-to-one with the channel tubes on its side facing the second square tube. The air intake of the second negative pressure pump is connected to the two second ends through a pipe.

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