A cleaning device for sound-absorbing cotton production

Abstract

The application discloses a cleaning device for sound-absorbing cotton production, and relates to the technical field of sound-absorbing cotton production, which has the advantages of online and continuous cleaning of the fiber splashed and scattered on the conveying belt, and the technical scheme is as follows: the cleaning device comprises a conveying belt, a melt-blowing machine, an air suction plate, a fiber suction assembly, a filtering assembly and two L-shaped mounting plates, the spinneret plate of the melt-blowing machine is located above the conveying belt, the two mounting plates are arranged on the rack of the conveying belt through a gasket plate, the spinneret plate is located above the vertical edges of the two mounting plates, the air suction plate is arranged at one end of the horizontal edge of one of the mounting plates, and the fiber suction assembly is arranged on the horizontal edge of the other mounting plate; when the conveying belt is working, the fiber suction assembly is used for sucking the fiber adhered to the surface of the conveying belt and the fiber scattered in the air near the spinneret plate; the filtering assembly is communicated with the air suction plate and the fiber suction assembly through a pipeline assembly, is used for providing negative pressure for the two, and filters and collects the fiber in the sucked airflow.

Description

Technical Field

[0001] This invention relates to the field of sound-absorbing cotton production technology, specifically a cleaning device for sound-absorbing cotton production. Background Technology

[0002] Sound-absorbing cotton is a porous sound-absorbing material widely used in building sound insulation, automotive interiors, and industrial noise reduction. In the production process of single-component meltblown sound-absorbing cotton, the meltblown machine heats and melts thermoplastic resins such as polypropylene (PP), which are then extruded from the spinneret and stretched into fine fibers under high-speed hot airflow. These high-temperature fibers, still in a molten state, are directly sprayed onto the surface of a continuously running conveyor belt. Relying on their own residual heat, the fibers adhere to each other, entangle, cool, and solidify, ultimately forming a fluffy and porous sound-absorbing cotton layer.

[0003] However, in actual production, as the molten, high-temperature fibers are sprayed onto the conveyor belt surface, some fibers splash into the air and scatter in the surrounding area. If these scattered fibers are not cleaned up in time, they will not only pollute the working environment and affect the cleanliness of the production site, but may also be inhaled by operators, posing a potential health hazard.

[0004] In response to the above problems, the applicant has developed a new technical solution in the actual production process to effectively solve the technical problems of environmental pollution and cleaning difficulties caused by fiber splashing. Summary of the Invention

[0005] To address the aforementioned technical shortcomings, the purpose of this invention is to provide a cleaning device for the production of sound-absorbing cotton, which has the advantage of being able to clean the fibers that splash and scatter on the conveyor belt online and continuously.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: This invention provides a cleaning device for the production of sound-absorbing cotton, including a conveyor belt and a meltblown machine, wherein the spinneret of the meltblown machine is located above the conveyor belt, and further includes: Two L-shaped mounting plates are set on the frame of the conveyor belt by pads, and there is a certain gap between the two mounting plates and the conveyor belt. The spinneret is located above the vertical edge between the two mounting plates. An air extraction plate, located at one end of the horizontal edge of one of the mounting plates, is used to extract fibers drifting in the air near the spinneret. A fiber suction assembly, located on the horizontal edge of another mounting plate, is used to suction fibers adhering to the surface of the conveyor belt and fibers floating in the air near the spinneret when the conveyor belt is in operation. The filter assembly, connected to the air extraction plate and fiber suction assembly via a pipe assembly, is used to provide negative pressure to both and to filter and collect fibers in the suction airflow. The sound-absorbing cotton formed on the conveyor belt passes under the exhaust plate, and the conveyor belt is a breathable mesh belt.

[0007] By adopting the above technical solution, this device can simultaneously clean the fibers floating in the air near the spinneret and the fibers adhering to the surface of the conveyor belt. The air extraction plate continuously sucks up the flying lint, the fiber extraction component sucks up the fibers adhering to the surface of the conveyor belt and the flying lint remaining in the air, and the filter component provides negative pressure for both and filters and collects the extracted fibers. This achieves online and continuous source extraction of splashed fibers and dual cleaning of the residue on the surface of the conveyor belt, avoiding fiber pollution of the environment and affecting product quality.

[0008] Preferably, the fiber absorption assembly includes: A sliding mechanism fixed to the horizontal edge of the mounting plate; A rotatable drum is connected to the sliding mechanism. Several air extraction ports are provided on the arc-shaped wall of the drum. The drum is pressed against the surface of the conveyor belt and rotated by the conveyor belt. The drum is connected to the pipeline assembly through a connecting pipe. Two arc-shaped baffles are fixed to the sliding mechanism. The two baffles are located on the outside of the roller and are arranged opposite to each other. The baffles are concentric with the roller and have a gap. They are used to block the air intake path on the circumferential side of the roller, so that the air intake port mainly draws air from the top and bottom directions. A rotating shaft is rotatably connected to the sliding mechanism, and the rotating shaft is located above the drum and parallel to the drum. The rotating shaft is provided with several protruding rods, and the protruding rods are correspondingly arranged in relation to the air extraction ports. The rotating shaft and the drum are connected by a gear set for transmission. When the drum rotates, the rotating shaft is driven to rotate through the gear set, so that the protruding rods extend into the corresponding air extraction ports in sequence for cleaning.

[0009] Preferably, there are two fiber absorption assemblies. In this case, the rollers in the two fiber absorption assemblies are arranged side by side and parallel to each other. The air extraction ports on the two rollers are distributed in multiple groups along the axial direction, and each group of air extraction ports on the two rollers is staggered in the axial direction.

[0010] Preferably, the sliding mechanism includes: Two inverted U-shaped fixing plates are fixed to the lower surface of the horizontal side of the mounting plate. Each of the two fixing plates is vertically slidably connected to a slide table. The opening of the drum is closed by an end cap. A connecting pipe is rotatably connected to the end cap and communicates with the drum. A column is provided on the side of the drum away from the end cap. The drum is located between the two slide tables, and the column is rotatably connected to one of the slide tables. The connecting pipe is fixedly connected to the other slide table. The rotating shaft is rotatably connected between the two slide tables. A compression spring is provided at the top of the slide table, and the end of the compression spring away from the slide table is connected to the fixed plate. The compression spring is used to make the drum elastically press against the surface of the conveyor belt.

[0011] Preferably, the filtering component includes: A collection bucket, in which an annular filter plate is horizontally installed, and a pipe assembly is located on one side of the collection bucket and connected to an air extraction plate through a diversion pipe. The pipe assembly is connected to a connecting pipe through a flexible hose. An exhaust fan is installed on the collection tank and located above the filter plate; A rotating column is rotatably connected to the top of the collection bucket, and a turntable located inside the filter plate is provided at the bottom of the rotating column. A scraper located below the filter plate is provided at the bottom of the turntable. The scraper is used to scrape off the fibers intercepted on the lower surface of the filter plate. The power source, located on the collection bucket, is used to drive the rotating column to rotate. The collection box, placed at the bottom of the collection bucket, is used to collect the fibers scraped off by the scraper.

[0012] Preferably, a baffle plate is horizontally provided at the top of the turntable, and the bottom end of the baffle plate contacts the top end of the filter plate to block a part of the upper surface of the filter plate, thereby blocking the airflow. The scraper is located in the blocking area below the baffle plate.

[0013] Preferably, the bottom end of the scraper is provided with a guide tube, which rotates synchronously with the scraper to guide the scraped fibers into the collection box at the bottom of the collection bucket. A baffle is coaxially rotatably connected inside the collection bucket, and the baffle is located below the end of the pipe assembly that connects to the collection bucket. The baffle is provided with a connecting groove for the bottom end of the guide tube to pass through, and the baffle rotates synchronously with the guide tube.

[0014] Preferably, the inside of the guide tube is a cone shape that is narrower at the top and wider at the bottom.

[0015] Preferably, the collection bucket has an opening one and an opening two on one side. The opening one is used to allow the collection box to be removed from the collection bucket. The collection box is provided with a sealing plate for closing the opening one. The opening two is located above the baffle plate. The collection bucket is detachably connected with a cover plate for closing the opening two.

[0016] Preferably, the diameter of the diverter is F, and the diameter of the hose is F1, where F1 is greater than F, so that most of the air volume provided by the exhaust fan is distributed to the drum and the suction force of the exhaust plate is reduced.

[0017] The beneficial effects of this invention are as follows: 1. By combining the air extraction plate with the fiber absorption assembly, the system can simultaneously and continuously clean fibers floating in the air near the spinneret and fibers adhering to the surface of the conveyor belt, effectively improving the working environment, protecting the health of operators, and achieving the goal of solving the pollution problem of fibers on the air and the surface of the conveyor belt.

[0018] 2. The fiber absorption assembly uses a roller that is pressed against the conveyor belt. The roller rotates using the power of the conveyor belt itself, without the need for additional drive. The arc-shaped baffle restricts the air extraction direction to the upper and lower areas, so that the negative pressure is concentrated on the surface of the conveyor belt, achieving graded cleaning of loose and stubborn fibers.

[0019] 3. The air extraction port on the drum and the protruding rod on the rotating shaft are linked by a gear set. When the drum rotates, the blockage fibers in the air extraction port are automatically cleaned, realizing self-cleaning and reducing downtime maintenance.

[0020] 4. The staggered arrangement of the double rollers eliminates the cleaning blind spots between adjacent air extraction port groups and improves the cleaning uniformity in the width direction of the conveyor belt.

[0021] 5. The filter assembly has a built-in rotating scraper and guide tube, which can automatically scrape off the fibers intercepted on the lower surface of the filter plate and guide them to the collection box through the guide tube, preventing secondary adsorption of fibers and extending the service life of the filter plate.

[0022] 6. By utilizing the difference in diameter between the diverter pipe and the flexible hose (F1 > F), the air volume is reasonably distributed so that most of the negative pressure is used for drum cleaning, while ensuring that the exhaust plate has appropriate suction to avoid excessive suction affecting the formation of the sound-absorbing cotton. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of this embodiment; Figure 2 This is a schematic diagram illustrating the structure of the pipe assembly in this embodiment; Figure 3 This is a structural schematic diagram illustrating the fixing plate in this embodiment; Figure 4 This is a schematic diagram illustrating the structure of the slide table in this embodiment; Figure 5 A schematic diagram showing the positional distribution of the baffles on both sides of the drum; Figure 6 This is a schematic diagram showing the positional distribution of the roller and the shaft; Figure 7 This is a schematic diagram showing the roller and the conveyor belt mesh being pressed together. Figure 8 This is a structural schematic diagram illustrating opening one in this embodiment; Figure 9This is a schematic diagram illustrating the structure of the guide tube in this embodiment; Figure 10 This is a schematic diagram illustrating the structure of the shield in this embodiment; Figure 11 This is a schematic diagram illustrating the structure of the scraper in this embodiment.

[0025] Explanation of reference numerals in the attached figures: In the diagram: 1. Conveyor belt; 11. Pad; 12. Frame; 2. Mounting plate; 21. Exhaust plate; 3. Meltblown machine; 31. Spinneret; 4. Fixing plate; 41. Slide table; 42. Compression spring; 5. Roller; 51. Exhaust port; 52. End cap; 53. Connecting pipe; 54. Column; 6. Baffle; 7. Shaft; 71. Protruding rod; 8. Gear set; 9. Pipe assembly; 91. Diverter pipe; 92. Hose; 10. Collection bucket; 101. Filter plate; 102. Exhaust fan; 103. Rotating column; 104. Turntable; 1041. Baffle plate; 1042. Scraper; 1043. Flow guide tube; 105. Opening one; 106. Opening two; 1061. Cover plate; 107. Baffle plate; 1071. Connecting groove; 108. Power source; 109. Collection box; 1091. Sealing plate. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] A cleaning device for the production of sound-absorbing cotton, such as Figure 1 and Figure 2As shown, the system includes a conveyor belt 1, a meltblown machine 3, and a spinneret 31 located above the conveyor belt 1. It also includes an extraction plate 21, a fiber suction assembly, a filter assembly, and two L-shaped mounting plates 2. The two L-shaped mounting plates 2 are mounted on the frame 12 of the conveyor belt 1 via pads 11, with a certain distance between the two mounting plates 2 and the conveyor belt 1. The spinneret 31 is located above the vertical edges of the two mounting plates 2. The extraction plate 21 is located at one end of the horizontal edge of one of the mounting plates 2 and is used to extract fiber drifting in the air near the spinneret 31. The fiber, the fiber suction assembly is set on the horizontal side of another mounting plate 2. When the conveyor belt 1 is working, it is used to suck up the fibers adhering to the surface of the conveyor belt 1 and the fibers floating in the air near the spinneret 31. The filter assembly is connected to the air extraction plate 21 and the fiber suction assembly through the pipe assembly 9. It is used to provide negative pressure for both and to filter and collect the fibers in the sucked airflow. The sound-absorbing cotton formed on the conveyor belt 1 passes under the air extraction plate 21. The frame 12 of the conveyor belt 1 is an integral part of the conveyor belt 1, which will not be described in detail here.

[0028] like Figure 1 and Figure 2 As shown, this device can simultaneously clean the fibers floating in the air near the spinneret 31 and the fibers adhering to the surface of the conveyor belt 1. The air extraction plate 21 continuously sucks up the flying lint (fibers floating in the air), the fiber suction component sucks up the fibers adhering to the surface of the conveyor belt 1 and the flying lint remaining in the air, and the filter component provides negative pressure for both and filters and collects the sucked-up fibers. This achieves dual cleaning of the source of splashed fibers and the surface residue of the conveyor belt 1, avoiding fiber pollution of the environment and affecting product quality, and achieving the goal of solving the pollution control of fibers on the air and the surface of the conveyor belt 1.

[0029] like Figures 2 to 7 As shown, the fiber suction assembly includes a sliding mechanism, a roller 5, a rotating shaft 7, and two arc-shaped baffles 6. The sliding mechanism is fixed to the horizontal side of the mounting plate 2. The roller 5 is rotatably connected to the sliding mechanism. Several air extraction ports 51 are provided on the arc-shaped wall of the roller 5. The roller 5 is pressed against the surface of the conveyor belt 1 and rotates by the conveyor belt 1. The roller 5 is connected to the pipe assembly 9 through a connecting pipe 53. The two baffles 6 are fixed to the sliding mechanism. The two baffles 6 are located outside the roller 5 and are arranged opposite to each other. The baffles 6 and the roller 5 are aligned. The roller 5 is designed with a gap to block the air intake path on the circumferential side of the roller 5, so that the air intake port 51 mainly draws air from the top and bottom directions. The rotating shaft 7 is rotatably connected to the sliding mechanism, and the rotating shaft 7 is located above the roller 5 and parallel to the roller 5. The rotating shaft 7 is provided with several protruding rods 71, which are correspondingly arranged with the air intake port 51. The rotating shaft 7 and the roller 5 are connected by a gear set 8. When the roller 5 rotates, the rotating shaft 7 is driven to rotate through the gear set 8, so that the protruding rods 71 ​​extend into the corresponding air intake port 51 in sequence for cleaning.

[0030] Both the conveyor belt 1 and the meltblown machine 3 are existing structures, and their specific construction will not be described in detail. In this embodiment, the conveyor belt 1 is a breathable mesh belt, and the roller 5 is pressed against the surface of the breathable mesh belt.

[0031] like Figures 2 to 7 As shown, the roller 5 is elastically pressed against the surface of the breathable mesh belt of the conveyor belt 1 by a sliding mechanism. When the conveyor belt 1 is running, the roller 5 rotates due to friction. The air extraction port 51 on the arc-shaped wall of the roller 5 sucks up the fibers under negative pressure. The two arc-shaped baffles 6 are concentric with the roller 5 and have gaps. When the air extraction port 51 rotates to face the baffle 6 (i.e., is blocked by the baffle 6), the baffle 6 blocks the circumferential side air extraction path (i.e., both sides perpendicular to the direction of movement of the conveyor belt 1), so that the airflow cannot enter directly from these sides. This forces the airflow to enter the air extraction port 51 mainly from the upper and lower directions (the lower direction points to the surface of the conveyor belt 1, and the upper direction points to the air). It should be noted that the airflow along the axial direction (i.e., the length direction) of the roller 5 is not affected by the baffle 6. However, since the axial airflow direction is parallel to the surface of the conveyor belt 1, the suction effect on the fibers is weak and mainly plays an auxiliary supplementary role. Based on this airflow restriction, a graded cleaning mechanism is formed. Non-contact cleaning (loose fibers): In the area below the two baffles 6, due to the restriction of the baffles 6, a continuous directional suction airflow is formed. This airflow continuously sucks up the loose fibers on the surface of the conveyor belt 1 and removes them. This process is independent of the specific location of the air extraction port 51 on the drum 5 and belongs to non-contact cleaning. Contact-force cleaning (stubborn fibers): As the drum 5 rotates, when the air extraction port 51 rotates to the lowest point of the drum 5 and comes into direct contact with the surface of the conveyor belt 1 (or the gap approaches zero), the distance between the air extraction port 51 and the fiber decreases sharply, and the suction force acting on the fiber is significantly enhanced (usually increasing several times to an order of magnitude). This overcomes electrostatic adsorption or weak adhesive force and "pulls out" and sucks away the stubborn fibers attached to the surface of the conveyor belt 1. This process is called contact-force cleaning. The two cleaning methods mentioned above work simultaneously: the airflow below the two baffles 6 is responsible for cleaning loose fibers, and the contact between the air intake 51 at the lowest point of the drum 5 and the conveyor belt 1 is responsible for cleaning stubborn fibers. The two work together to achieve graded cleaning of fibers with different adhesion strengths. The airflow above the two baffles 6 is responsible for absorbing the flying fluff in the air. Meanwhile, the roller 5 drives the rotating shaft 7 to rotate through the gear set 8. The roller 5 and the rotating shaft 7 rotate synchronously. At this time, the protruding rods 71 ​​on the rotating shaft 7 will extend into the corresponding air extraction ports 51 in sequence, pushing the blocked fibers back into the roller 5 and being carried away by the negative pressure airflow. In the above process, the roller 5 does not require additional power to rotate. The baffle 6 restricts the air intake direction of the air extraction port 51 to the upper and lower areas, which improves the cleaning efficiency. The protruding rods 71 ​​clean the air extraction port 51 online to prevent blockage and ensure long-term continuous operation.

[0032] like Figures 2 to 7 As shown, there are two fiber suction components. The rollers 5 in the two fiber suction components are arranged side by side and parallel to each other. The air extraction ports 51 on the two rollers 5 are distributed in multiple groups along the axial direction. Each group of air extraction ports 51 on the two rollers 5 is staggered in the axial direction. The two rollers 5 work at the same time. Due to the staggered arrangement of the air extraction ports 51, the group of air extraction ports 51 of the first roller 5 covers some axial areas of the conveyor belt 1. The gap area is covered by the group of air extraction ports 51 of the second roller 5. The conveyor belt 1 passes through the two rollers 5 in sequence. Each axial position is directly sucked by at least one air extraction port 51 of the roller 5. This eliminates the cleaning blind zone between adjacent groups of air extraction ports 51 when using a single roller 5, and improves the uniformity and thoroughness of cleaning in the width direction of the conveyor belt 1. In particular, it significantly improves the removal effect of stubborn fibers.

[0033] like Figures 3 to 6 As shown, the sliding mechanism includes a compression spring 42 and two inverted U-shaped fixing plates 4. The two fixing plates 4 are fixed to the lower surface of the horizontal side of the mounting plate 2. Each of the two fixing plates 4 has a vertically sliding slide table 41 connected to it. The opening of the drum 5 is closed by an end cap 52. A connecting pipe 53 is rotatably connected to the end cap 52 and communicates with the drum 5. A column 54 is provided on the side of the drum 5 away from the end cap 52. The drum 5 is located between the two slide tables 41, and the column 54 is rotatably connected to one of the slide tables 41. The connecting pipe 53 is fixedly connected to the other slide table 41. A rotating shaft 7 is rotatably connected between the two slide tables 41. The compression spring 42 is located at the top of the slide table 41, and the compression spring 42 is away from the slide table 41. One end is connected to the fixed plate 4. The compression spring 42 is used to make the roller 5 elastically press against the surface of the conveyor belt 1. The compression spring 42 presses the slide table 41 downward, so that the roller 5 elastically presses against the surface of the conveyor belt 1. When the conveyor belt 1 is running, the roller 5 is driven to rotate. At the same time, it can float up and down according to the slight undulations of the surface of the conveyor belt 1, always maintaining contact. The elastic pressing ensures that the friction between the roller 5 and the conveyor belt 1 is sufficient to drive the rotation, and will not damage the conveyor belt 1 or the roller 5 due to hard contact. It adapts to the thickness fluctuation of the conveyor belt 1. The slide table 41 near the gear set is provided with a cover for covering the gear set (not shown in the figure). The cover reduces the occurrence of fiber flying and affecting the operation of the gear set.

[0034] like Figures 2 to 9As shown, the filter assembly includes a collection bucket 10, an exhaust fan 102, a rotating column 103, a power source 108, and a collection box 109. An annular filter plate 101 is horizontally installed inside the collection bucket 10. A pipe assembly 9 is located on one side of the collection bucket 10 and connected to an exhaust plate 21 via a diverter pipe 91. The pipe assembly 9 is connected to a connecting pipe 53 via a flexible hose 92. The exhaust fan 102 is installed on the collection bucket 10 and located above the filter plate 101. The rotating column 103 is rotatably connected to the top of the collection bucket 10. The bottom end is provided with a turntable 104 located inside the filter plate 101. The turntable 104 is coaxial with the filter plate 101 and is in contact with the inner wall of the filter plate 101. The bottom end of the turntable 104 is provided with a scraper 1042 located below the filter plate 101. The scraper 1042 is used to scrape off the fibers intercepted on the lower surface of the filter plate 101. The power source 108 is set on the collection bucket 10 to drive the rotating column 103 to rotate. The collection box 109 is placed at the bottom end inside the collection bucket 10 to collect the fibers scraped off by the scraper 1042. The exhaust fan 102 creates a negative pressure inside the collection bin 10. The airflow containing fibers passes through the exhaust plate 21, the diverter pipe 91, the roller 5, the hose 92, and the connecting pipe 53, converging into the pipe assembly 9. Then, it enters the collection bin 10 through the pipe assembly 9 and passes through the annular filter plate 101 from bottom to top. The fibers are intercepted on the lower surface of the filter plate 101, and the clean air is discharged from the top. The rotating column 103 is driven by the power source 108 to rotate, which drives the turntable 104 and the scraper 1042 to rotate. The scraper 1042 is in close contact with the lower surface of the filter plate 101, scraping off the intercepted fibers. The scraped fibers fall into the collection box 109 at the bottom of the collection bin 10 for collection. This achieves efficient filtration and automatic scraping of fibers, avoids clogging of the filter plate 101, and extends the maintenance cycle. The power source 108 can be an electric motor.

[0035] like Figures 8 to 11 As shown, a baffle plate 1041 is horizontally provided at the top of the turntable 104. The bottom end of the baffle plate 1041 contacts the top end of the filter plate 101 and is used to block a part of the upper surface of the filter plate 101, thereby blocking the airflow. The scraper 1042 is located in the blocking area below the baffle plate 1041. The baffle plate 1041 rotates with the turntable 104 and forms a dynamic blockage on a part of the upper surface of the filter plate 101. Since the exhaust fan 102 draws air from above the filter plate 101, the baffle plate 1041 blocks the airflow in this area, which reduces the airflow disturbance in the area below where the scraper 1042 is located. The scraped fibers are more likely to fall off under the action of gravity, effectively reducing the secondary adsorption of scraped fibers and improving the self-cleaning efficiency. A guide tube 1043 is provided at the bottom end of the scraper 1042. The guide tube 1043 rotates synchronously with the scraper 1042 to guide the scraped fibers into the collection box 109 at the bottom of the collection bucket 10. A baffle 107 is coaxially rotatably connected inside the collection bucket 10, and the baffle 107 is located below the end of the pipe assembly 9 that connects to the collection bucket 10. The baffle 107 is provided with a connecting groove 1071 for the bottom end of the guide tube 1043 to pass through. The baffle 107 rotates synchronously with the guide tube 1043. The inside of the guide tube 1043 is a cone shape that is narrow at the top and wide at the bottom. The cone shape allows the fibers to enter the guide tube 1043 smoothly. As the channel gradually widens, fibers are less likely to bridge and clog. The guide cylinder 1043 rotates together with the turntable 104. The baffle 107, through the connecting groove 1071, cooperates with the guide cylinder 1043 and also rotates synchronously. The guide cylinder 1043 guides the scraped fibers to the top of the collection box 109. The fibers fall inside the guide cylinder 1043, avoiding being blown away by the horizontal airflow inside the box. The baffle 107 is located below the connecting end of the pipe assembly 9, which can reduce the airflow blowing the fibers in the collection box 109. The combination of the guide cylinder 1043 and the baffle 107 makes the fibers fall into the collection box 109 in a directional manner, preventing the fibers from scattering and improving the collection efficiency.

[0036] like Figure 8 and Figure 9 As shown, the collection bin 10 has an opening 105 and an opening 106 on one side. The opening 105 is used to allow the collection box 109 to be removed from the collection bin 10. The collection box 109 is provided with a sealing plate 1091 for closing the opening 105. The opening 106 is located above the baffle 107. The collection bin 10 is detachably connected to a cover plate 1061 for closing the opening 106. When the collection box 109 needs to be cleaned, the exhaust fan 102 and the power source 108 can be turned off, and the sealing plate 1091 can be pulled horizontally to open. Open the opening 105 and pull out the collection box 109 to clean the fibers inside. A sealing gasket is provided between the sealing plate 1091 and the opening 105. Alternatively, before pulling out the collection box 109, only the power source 108 can be turned off to stop the scraper 1042 from rotating. While the exhaust fan 102 continues to work and the filter plate 101 continues to filter, the collection box 109 can be pulled out of the collection bucket 10 for cleaning. Since the pulling-out operation time is short (usually a few seconds to a dozen seconds) and the fiber suction component and the exhaust plate 21 are still working, the impact is limited. When it is necessary to inspect or clean the scraper 1042, guide tube 1043 or baffle 107 inside the collection tank 10, the cover plate 1061 can be removed to operate through the opening 106, which is convenient for maintenance.

[0037] like Figure 2 and Figure 3As shown, the diameter of the diverter pipe 91 is F, and the diameter of the hose 92 and the connecting pipe 53 is F1, where F1 is greater than F. This is to ensure that most of the airflow provided by the exhaust fan 102 is distributed to the drum 5, and to reduce the suction force of the suction plate 21. Since the diameter of the hose 92 is greater than that of the diverter pipe 91, under the condition that the total negative pressure of the exhaust fan 102 is constant, the airflow tends to pass through the hose 92 with less resistance. Therefore, most of the airflow is distributed to the drum 5 (fiber absorption assembly), while the suction plate 21 receives a smaller airflow. This reasonable allocation of negative pressure resources concentrates the main cleaning force on the surface of the conveyor belt 1 (drum 5), while avoiding excessive suction force of the suction plate 21 from affecting the sound-absorbing cotton molding or causing unnecessary fiber adsorption. This achieves optimized airflow distribution. The distance between the suction plate 21 and the molded sound-absorbing cotton is, for example, 15cm. The negative pressure is adjusted according to actual production needs, so as to effectively absorb the flying lint without interfering with the molding of the sound-absorbing cotton. This embodiment is only an example.

[0038] The working process of this device is as follows: 1. Fiber spraying and fluff generation The spinneret 31 of the meltblown machine 3 sprays molten fibers onto the surface of the continuously running conveyor belt 1. The fibers adhere to each other by their own residual heat to form a sound-absorbing cotton layer. During this process, some fibers splash into the air to form scattered fluff.

[0039] 2. Source extraction of flying catkins The air extraction plate 21, located on the horizontal side of the mounting plate 2, continuously absorbs the fibers floating in the air near the spinneret 31 under the negative pressure provided by the filter assembly, reducing the spread of flying lint into the workshop.

[0040] 3. Cleaning of fibers on the conveyor belt surface (grading cleaning) Non-contact cleaning (loose fibers): The roller 5 in the fiber suction assembly is elastically pressed against the surface of the conveyor belt 1 through a sliding mechanism. When the conveyor belt 1 is running, the roller 5 is driven to rotate by friction. Two arc-shaped baffles 6 block the suction path on the circumferential side of the roller 5, so that the air extraction port 51 mainly draws air from the top and bottom (the bottom points to the surface of the conveyor belt, and the top points to the air). The airflow along the axial direction of the roller 5 is not affected by the baffles, but because it is parallel to the surface of the conveyor belt, the suction effect on the fibers is weak and mainly plays an auxiliary role. A continuous directional suction airflow is formed in the lower area to continuously suck up the loose fibers on the surface of the conveyor belt 1 and remove them. A continuous directional suction airflow is formed in the upper area to continuously absorb the flying fibers in the air. Strong contact cleaning (stubborn fibers): As the drum 5 rotates, when the air extraction port 51 rotates to the lowest point of the drum 5 and comes into direct contact with the surface of the conveyor belt 1 (or the gap approaches zero), the suction force is significantly enhanced due to the sharp decrease in the distance between the air extraction port 51 and the fiber. This is sufficient to overcome electrostatic adsorption or weak adhesive force and "pull out" and suck away the stubborn fibers attached to the surface of the conveyor belt 1.

[0041] 4. Online self-cleaning of the exhaust port The roller 5 drives the upper rotating shaft 7 to rotate synchronously through the gear set 8. The protruding rods 71 ​​on the rotating shaft 7 extend into the corresponding air extraction ports 51 in sequence, pushing the blocked fibers back into the roller 5 and being carried away by the negative pressure airflow to prevent the air extraction ports 51 from becoming blocked.

[0042] 5. Double-roller staggered coverage (equipped with two fiber suction components) Two rollers 5 are arranged side by side in parallel with their air extraction ports 51 axially staggered. The conveyor belt 1 passes through the two rollers 5 in sequence, and each axial position is covered by at least one air extraction port 51 of the roller 5, eliminating blind spots in cleaning and improving cleaning uniformity.

[0043] 6. Filtration and collection of fiber-containing airflow The fiber-containing airflow drawn in by the exhaust plate 21 and the roller 5 flows into the collection tank 10 through the pipe assembly 9. The exhaust fan 102 creates a negative pressure inside the collection tank 10, and the airflow passes through the annular filter plate 101 from bottom to top. The fibers are intercepted on the lower surface of the filter plate 101, and the clean air is discharged from the exhaust port of the exhaust fan 102. At the same time, the power source 108 drives the rotating column 103 to rotate, which in turn drives the turntable 104 and scraper 1042 to rotate. The scraper 1042 sticks to the lower surface of the filter plate 101 and scrapes off the intercepted fibers. The scraped fibers are guided by the guide tube 1043 (narrow at the top and wide at the bottom cone) and fall into the collection box 109 at the bottom of the collection tank 10. The baffle plate 1041 at the top of the turntable 104 dynamically blocks the upper surface of the filter plate 101 to reduce airflow disturbance and prevent the scraped fibers from being re-adsorbed.

[0044] 7. Maintenance and Repair When cleaning the collection box 109, the exhaust fan 102 and the power source 108 can be turned off, or only the power source 108 can be turned off (the exhaust fan 102 continues to work). The collection box 109 can be pulled out for cleaning. When inspecting or cleaning the internal parts, the cover plate 1061 of the second opening 106 can be removed for operation without disassembling the whole.

[0045] The entire working process enables online, continuous, and graded cleaning of flying lint near the spinneret 31 and fibers adhering to the surface of the conveyor belt 1, and has self-cleaning and convenient maintenance functions.

[0046] This invention utilizes a single power source, the conveyor belt 1, to drive the rotation of the drum 5. Simultaneously, a baffle 6 constrains the airflow direction, causing a sudden increase in localized suction force at the suction port 51 when it contacts the conveyor belt 1 at the lowest point of the drum 5. This allows for the sequential non-contact suction of loose fibers and the contact removal of stubborn fibers on the same drum 5. The suction port 51 is then cleaned online via a gear set 8 linked to a protruding rod 71. All three functions are driven by the single power source of the conveyor belt 1, working synergistically. The overall cleaning effect is far superior to the simple sum of the effects of using each function individually, exhibiting a non-obvious synergistic effect.

[0047] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A cleaning device for producing sound-absorbing cotton, comprising a conveyor belt (1) and a meltblown machine (3), wherein the spinneret (31) of the meltblown machine is located above the conveyor belt (1), characterized in that, Also includes: Two L-shaped mounting plates (2) are set on the frame (12) of the conveyor belt (1) by pads (11), and there is a certain gap between the two mounting plates (2) and the conveyor belt (1). The spinneret (31) is located above the vertical side of the two mounting plates (2). An air extraction plate (21) is set at one end of the horizontal edge of one of the mounting plates (2) to extract fibers floating in the air near the spinneret (31); The fiber suction assembly is located on the horizontal side of another mounting plate (2) and is used to suction the fibers adhering to the surface of the conveyor belt (1) and the fibers floating in the air near the spinneret (31) when the conveyor belt (1) is working. The filter assembly, connected to the suction plate (21) and the fiber suction assembly via the pipe assembly (9), is used to provide negative pressure for both and to filter and collect the fibers in the suction airflow. The sound-absorbing cotton formed on the conveyor belt (1) passes under the air extraction plate (21), and the conveyor belt (1) is a breathable mesh belt.

2. The cleaning device for producing sound-absorbing cotton as described in claim 1, characterized in that, The fiber absorption assembly includes: A sliding mechanism fixed to the horizontal side of the mounting plate (2); The roller (5) is rotatably connected to the sliding mechanism. Several air extraction ports (51) are provided on the arc-shaped wall of the roller (5). The roller (5) is pressed against the surface of the conveyor belt (1) and rotated by the conveyor belt (1). The roller (5) is connected to the pipe assembly (9) through the connecting pipe (53). Two arc-shaped baffles (6) are fixed on the sliding mechanism. The two baffles (6) are located on the outside of the roller (5) and are arranged opposite to each other. The baffles (6) are concentric with the roller (5) and have a gap. They are used to block the air intake path on the circumferential side of the roller (5) so that the air intake port (51) mainly draws air from the upper and lower directions. A rotating shaft (7) is rotatably connected to the sliding mechanism, and the rotating shaft (7) is located above the roller (5) and parallel to the roller (5). The rotating shaft (7) is provided with several protruding rods (71), and the protruding rods (71) are correspondingly arranged with the air extraction port (51). The rotating shaft (7) and the roller (5) are connected by a gear set (8). When the roller (5) rotates, the rotating shaft (7) is driven to rotate through the gear set (8), so that the protruding rods (71) extend into the corresponding air extraction port (51) in sequence for cleaning.

3. The cleaning device for producing sound-absorbing cotton as described in claim 2, characterized in that, The number of fiber absorption components is two. At this time, the rollers (5) in the two fiber absorption components are arranged side by side and parallel to each other. The air extraction ports (51) on the two rollers (5) are distributed in multiple groups along the axial direction. Each group of air extraction ports (51) on the two rollers (5) is staggered in the axial direction.

4. The cleaning device for producing sound-absorbing cotton as described in claim 2, characterized in that, The sliding mechanism includes: Two U-shaped fixing plates (4) are fixed to the lower surface of the horizontal side of the mounting plate (2). Each of the two fixing plates (4) is vertically slidably connected to a slide table (41). The opening of the barrel (5) is closed by an end cap (52). A connecting pipe (53) is rotatably connected to the end cap (52) and communicates with the barrel (5). A column (54) is provided on the side of the barrel (5) away from the end cap (52). The barrel (5) is located between the two slide tables (41), and the column (54) is rotatably connected to one of the slide tables (41). The connecting pipe (53) is fixedly connected to the other slide table (41). The rotating shaft (7) is rotatably connected between the two slide tables (41). A compression spring (42) is provided at the top of the slide (41), and the end of the compression spring (42) away from the slide (41) is connected to the fixed plate (4). The compression spring (42) is used to make the drum (5) elastically press against the surface of the conveyor belt (1).

5. A cleaning device for producing sound-absorbing cotton as described in claim 4, characterized in that, The filtering component includes: A collection bucket (10) is provided, in which a ring-shaped filter plate (101) is horizontally installed. The pipe assembly (9) is located on one side of the collection bucket (10) and is connected to the air extraction plate (21) through a diversion pipe (91). The pipe assembly (9) is connected to the connecting pipe (53) through a hose (92). An exhaust fan (102) is installed on the collection bucket (10) and located above the filter plate (101); A rotating column (103) is rotatably connected to the top of the collection bucket (10), and the bottom end of the rotating column (103) is provided with a turntable (104) located inside the filter plate (101). The bottom end of the turntable (104) is provided with a scraper (1042) located below the filter plate (101). The scraper (1042) is used to scrape off the fibers intercepted on the lower surface of the filter plate (101). A power source (108) is provided on the collection bucket (10) to drive the rotating column (103) to rotate. The collection box (109) is placed at the bottom of the collection bucket (10) to collect the fibers scraped off by the scraper (1042).

6. The cleaning device for producing sound-absorbing cotton as described in claim 5, characterized in that, The top of the turntable (104) is provided with a horizontal baffle plate (1041), the bottom of the baffle plate (1041) is in contact with the top of the filter plate (101), and is used to block a part of the upper surface of the filter plate (101) to block the airflow. The scraper (1042) is located in the blocking area below the baffle plate (1041).

7. A cleaning device for producing sound-absorbing cotton as described in claim 6, characterized in that, The bottom end of the scraper (1042) is provided with a guide tube (1043). The guide tube (1043) rotates synchronously with the scraper (1042) to guide the scraped fibers to the collection box (109) at the bottom of the collection bucket (10). A baffle (107) is coaxially rotatably connected inside the collection bucket (10), and the baffle (107) is located below the end of the pipe assembly (9) and the collection bucket (10). The baffle (107) is provided with a connecting groove (1071) through which the bottom end of the guide tube (1043) passes. The baffle (107) rotates synchronously with the guide tube (1043).

8. The cleaning device for producing sound-absorbing cotton as described in claim 7, characterized in that, The inside of the guide tube (1043) is a cone shape that is narrow at the top and wide at the bottom.

9. A cleaning device for producing sound-absorbing cotton as described in claim 7, characterized in that, The collection bucket (10) has an opening one (105) and an opening two (106) on one side. The opening one (105) is used for the collection box (109) to be removed from the collection bucket (10). The collection box (109) is provided with a sealing plate (1091) for closing the opening one (105). The opening two (106) is located above the baffle plate (107). The collection bucket (10) is detachably connected with a cover plate (1061) for closing the opening two (106).

10. A cleaning device for producing sound-absorbing cotton as described in claim 5, characterized in that, The diameter of the diverter (91) is F, and the diameter of the hose (92) is F1, where F1 is greater than F, so that most of the air volume provided by the exhaust fan (102) is distributed to the drum (5) and the suction force of the exhaust plate (21) is reduced.

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