A pulverizing device for recycled polyester staple fibers

Abstract

The application relates to the field of fiber crushing, and discloses a crushing device for regenerated polyester staple fiber, which comprises a crushing box and a controller, one side of the crushing box is provided with a power box, a driving module is arranged in the power box, two crushing rollers which are in engagement are arranged in the crushing box; a rotary crusher is arranged on one side of the crushing box; after polyester clothes are processed into fragments, the fragments are conveyed into a pretreatment box arranged at the top end of the crushing box through an elevator; the pretreatment box is in communication with a feeding port arranged at the top of the crushing box; a discharging port is arranged at the bottom of the crushing box; the middle part of the crushing box is arranged as a crushing cavity; the crushing rollers are located in the crushing cavity; the inner diameter of the feeding port is larger than that of the discharging port; and the inner diameter of the crushing cavity gradually decreases from top to bottom. The application effectively reduces the toughness of polyester fragments through steam softening pretreatment, relaxes molecular chains, and significantly reduces the mechanical stress required in subsequent crushing; the tapered crushing cavity is combined with a gradually compressed space to realize step-by-step refinement of the fragments and avoid over-crushing.

Description

Technical Field

[0001] This invention relates to the field of fiber pulverization, and more specifically to a pulverizing device for recycled polyester staple fibers. Background Technology

[0002] The production of recycled polyester staple fiber uses waste polyester materials, such as mineral water bottles, polyester clothing, and industrial waste, as raw materials. Crushing equipment is particularly important in this process, as it provides the required raw material form for subsequent recycling. On the one hand, waste polyester materials are diverse in form, large in size, and irregular in shape, thus requiring crushing for easier handling and transportation; on the other hand, it also improves cleaning and separation efficiency.

[0003] Meanwhile, since the production of recycled polyester staple fiber requires melting the crushed polyester fragments into a melt and then spinning it, if there are large pieces of material in the crushing process, it will at least reduce the melting efficiency, and at worst block the feed inlet of the melting equipment, affecting the continuity of production. In summary, the crushing device is an important preliminary step in the production of recycled polyester staple fiber.

[0004] Existing pulverizing devices still have some shortcomings. For example, for polyester clothing, due to its high toughness and high elongation at break, the polyester fibers in the washed garments tend to stretch rather than break directly when subjected to shear force during the pulverizing process. At the same time, most existing pulverizing devices use shear-impact type equipment designed for rigid polyester materials, which has insufficient shear force. This combination results in a large amount of long and thin fibers being generated. On the one hand, these fibers are prone to tangling and forming blind spots during subsequent washing, affecting the efficiency of impurity separation. On the other hand, when these long and thin fibers enter the melting stage, their irregular shape leads to abnormal heating and flow properties, thereby interfering with the melting and spinning processes and reducing the quality of recycled fibers. Therefore, it is urgent to solve this problem. Summary of the Invention

[0005] The purpose of this invention is to provide a pulverizing device for recycled polyester staple fibers, which solves the technical problem that a large number of fine and long fibers are generated during the pulverizing process of polyester clothing, affecting subsequent washing, separation and melt spinning processes.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A crushing device for recycled polyester staple fiber includes: a crushing box and a controller. A power box is provided on one side of the crushing box, and a drive module is provided inside the power box. Two interlocking crushing rollers are provided inside the crushing box.

[0008] A rotary shredder is installed on one side of the shredder to process polyester clothing into fragments. The fragments are then conveyed to a pretreatment box at the top of the shredder by an elevator. The pretreatment box is connected to the feed inlet at the top of the shredder. The discharge outlet is located at the bottom of the shredder. The middle part of the shredder is a shredding chamber with a shredding roller inside. The inner diameter of the feed inlet is larger than that of the discharge outlet, and the inner diameter of the shredding chamber gradually decreases from top to bottom.

[0009] Furthermore, a steam softening component is installed inside the pretreatment chamber;

[0010] The steam softening unit can spray 60-80℃ steam onto the sheared fragments. The bottom of the pretreatment box is equipped with an inclined guide plate with strip-shaped vent holes on its surface to discharge excess steam and guide the material into the feed inlet.

[0011] Furthermore, the steam softening component includes:

[0012] The steam generating unit includes a steam storage tank and an electric heating steam generator located inside the steam storage tank. A solenoid valve is installed at the outlet of the steam storage tank. The steam generating unit is located on one side of the pulverizing box.

[0013] The steam injection unit includes an annular steam main pipe and multiple branch nozzles. The annular steam main pipe is arranged circumferentially along the top of the inner side wall of the pretreatment tank. The outlet of the steam storage tank is connected to the annular steam main pipe through a high-temperature resistant hose. The branch nozzles are installed on the annular steam main pipe and tilted downwards so that the steam ejected from the branch nozzles covers the polyester clothing fragments.

[0014] Furthermore, a pressing component is provided inside the feed inlet. The pressing component is used to press the pre-treated polyester clothing fragments towards the crushing roller in the crushing chamber to accelerate the crushing of the polyester clothing fragments.

[0015] Furthermore, the pressing component includes: an automatic telescopic rod, the cylinder part of which is located inside the power box, the telescopic end of which is fixed to the slide plate, the slide plate being slidably connected to the slide groove, the slide groove being located on the inner side wall of the crushing box, the slide groove being provided with an L-shaped groove, the short side of which is vertically arranged, the long side of which is horizontally arranged, and a horizontal shaft being slidably connected inside the L-shaped groove;

[0016] The end of the horizontal shaft passes through the slide plate and is fixed to the lifting column. The bottom of the lifting column is fixed to the counterweight pressing plate. The counterweight pressing plate is located directly above the meshing area of ​​the two crushing rollers. An inclined groove is opened on the slide plate at the position corresponding to the horizontal shaft. When the counterweight pressing plate moves down to the bottom, there is a gap between it and the crushing roller.

[0017] Furthermore, an inclined plate is fixedly installed on one side of the slide plate, and the angle between the inclined guide plate and the inner side wall of the pretreatment box forms a shielding space to shield the counterweight pressing plate when it is not in operation.

[0018] The inclined guide plate is rotatably mounted on the inner wall of the pretreatment box via a hinge shaft. The top of the inclined plate is set as a bent structure and contacts the free end of the inclined guide plate. Through the left and right displacement of the inclined plate, the inclined guide plate is pushed to adaptively adjust the angle according to the working state of the counterweight pressing plate.

[0019] The inclined guide plate is also provided with multiple evenly distributed convex strips, which are interspersed with strip-shaped air vents;

[0020] The free end of the inclined guide plate is also hinged with a pull rope. The other end of the pull rope passes through the pretreatment box and the crushing box and is located directly below the biting area of ​​the two crushing rollers, and is fixedly connected to an arched component. By changing the angle of the inclined guide plate, the arched component is pulled up and down.

[0021] As the counterweight plate moves to the left along with the slide plate to the meshing area of ​​the two crushing rollers, it drives the inclined plate to actively push the inclined guide plate, causing the inclined guide plate to deflect upward.

[0022] When the counterweight plate is pressed to the right to reset, the inclined plate moves to the right with the slide plate and gradually releases the pushing action on the inclined guide plate. Under the action of gravity, the inclined guide plate swings back down around the hinge axis to reset to the initial angle.

[0023] Furthermore, the drive module includes a servo motor, which is installed in the power box. The servo motor is connected to the main gear, which meshes with the driven gear. The main gear and the driven gear are respectively fixed to the connecting shafts of the two crushing rollers, so as to realize the servo motor driving the two crushing rollers to bite and crush the raw materials.

[0024] Furthermore, there are two symmetrically arranged pressing components, and the two horizontal axes are fixedly connected as a whole.

[0025] The beneficial effects of this invention are:

[0026] (1) On the one hand, the present invention uses a steam softening component to precisely control the temperature of polyester fragments, reducing the toughness of the raw materials and significantly reducing the mechanical stress required for subsequent crushing. Specifically, the double crushing rollers form a progressive compression space in the conical cavity, and the fragments are naturally graded and refined under the action of gravity. The upper space completes the initial crushing, and the lower narrow space enhances the interlocking force between the rollers, ensuring that the fibers are fully dissociated and avoiding over-crushing. This not only shortens the processing cycle, but also ensures the length uniformity and morphological integrity of the recycled short fibers, making them directly usable for spinning regeneration. On the other hand, the steam pretreatment reduces the crushing resistance from the source, significantly reduces the wear of the cutting tools, and extends the life of the core components. The inclined guide plate and vent design of the pretreatment box guide the material and quickly discharge the residual steam, preventing high-temperature steam from corroding the box and improving stability.

[0027] (2) On the one hand, in order to solve the problem that the pretreated polyester fragments are in a fluffy state due to steam softening and easily float above the crushing roller when falling by gravity alone, and cannot enter the biting area in time, thus interrupting the crushing rhythm, the pressing component can compact the fluffy fragments and force them to the contact point of the crushing roller by actively pressing down the counterweight pressing plate, ensuring that the fragments are continuously sheared, avoiding the blockage of the feed port, and improving the continuity of the crushing process; on the other hand, the polyester fragments have reduced toughness after being softened by steam, but may still be bounced off by the crushing roller due to their high fluffiness, forming incompletely cut long and thin fibers; therefore, the downward pressure of the counterweight pressing plate can counteract the rebound force of the fragments, forcing the fragments to penetrate into the biting area of ​​the two rollers, ensuring that the shearing force is fully applied to the fiber bundle, reducing the long and thin fiber residue caused by insufficient biting, and improving the morphological uniformity of the short fibers after crushing. Attached Figure Description

[0028] The invention will now be further described with reference to the accompanying drawings.

[0029] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 This is a schematic diagram of the internal structure of the crushing chamber in this invention;

[0031] Figure 3 A 3D schematic diagram of the pressing component;

[0032] Figure 4 for Figure 3 A schematic diagram of the working status;

[0033] Figure 5 This is a schematic diagram of the internal structure of the pretreatment box in this invention.

[0034] Figure Descriptions: 1. Crushing Box; 2. Power Box; 3. Crushing Roller; 4. Rotary Crusher; 5. Elevator; 6. Feed Inlet; 7. Discharge Outlet; 8. Pretreatment Box; 81. Steam Softening Component; 82. Inclined Guide Plate; 83. Strip-shaped Ventilation Hole; 811. Steam Generating Unit; 812. Steam Injection Unit; 8121. Annular Steam Main Pipe; 8122. Branch Nozzle; 9. Pressing Component; 91. Automatic Telescopic Rod; 92. Slide Plate; 93. Slide Groove; 94. L-shaped Groove; 95. Horizontal Shaft; 96. Lifting Column; 97. Counterweight Pressing Plate; 98. Inclined Groove; 10. Inclined Plate; 11. Obstruction Space; 12. Bending Structure; 13. Pull Rope; 14. Rope Loop; 15. Arched Component; 16. Protruding Strip. Detailed Implementation

[0035] 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.

[0036] Please see Figures 1-5 As shown, the present invention is a crushing device for recycled polyester staple fiber, comprising: a crushing box 1 and a controller, a power box 2 is provided on one side of the crushing box 1, a drive module is provided inside the power box 2, and two interlocking crushing rollers 3 are provided inside the crushing box 1.

[0037] A rotary shredder 4 is installed on one side of the shredder 1. After processing the polyester clothing into fragments, the fragments are conveyed to a pretreatment box 8 located at the top of the shredder 1 by an elevator 5. The pretreatment box 8 is connected to the feed inlet 6 at the top of the shredder 1. The bottom of the shredder 1 has a discharge outlet 7. The middle of the shredder 1 is a shredding chamber, and the shredding rollers 3 are located inside the shredding chamber. The inner diameter of the feed inlet 6 is larger than that of the discharge outlet 7, and the inner diameter of the shredding chamber gradually decreases from top to bottom. One embodiment of the drive module includes a servo motor, which is installed in the power box 2. The servo motor is connected to a main gear, which meshes with a driven gear. The main gear and the driven gear are respectively fixed to the connecting shafts of the two shredding rollers 3, so as to realize the purpose of the servo motor driving the two shredding rollers 3 to mesh and shred the raw materials.

[0038] The pretreatment box 8 is equipped with a steam softening component 81;

[0039] The steam softening component 81 can spray steam at 60-80°C onto the sheared fragments. The bottom of the pretreatment box 8 is provided with an inclined guide plate 82. The surface of the inclined guide plate 82 is provided with strip-shaped vent holes 83, which are used to discharge excess steam and guide the material into the feed port 6.

[0040] Steam softening assembly 81 includes:

[0041] The steam generating unit 811 includes a steam storage tank and an electric heating steam generator located inside the steam storage tank. A solenoid valve is installed at the outlet of the steam storage tank. The steam generating unit 811 is located on one side of the crushing box 1.

[0042] The steam injection unit 812 includes an annular steam main pipe 8121 and multiple branch nozzles 8122. The annular steam main pipe 8121 is arranged circumferentially along the top of the inner side wall of the pretreatment tank 8. The outlet of the steam storage tank is connected to the annular steam main pipe 8121 through a high-temperature resistant hose. The branch nozzles 8122 are installed on the annular steam main pipe 8121 and tilted downwards so that the steam ejected from the branch nozzles 8122 covers the polyester clothing fragments.

[0043] In this invention, waste polyester clothing first enters a rotary shredder, where it is cut into uniformly sized fragments by high-speed rotating blades, preventing subsequent clogging and improving shredding efficiency. The fragments are then conveyed by an elevator 5 to a pretreatment box 8, where a steam softening component 81 is activated. A steam generating unit 811, i.e., an electrically heated steam generator, produces low-pressure steam at 60-80°C, and the steam flow is controlled by a solenoid valve. The annular main pipe and branch nozzles 8122 of the steam injection unit 812 spray steam downwards, evenly covering the surface of the fragments. The softening process involves the 60-80°C steam relaxing the polyester molecular chains, lowering the glass transition temperature, reducing the fragments' toughness and increasing their brittleness, while simultaneously removing surface impurities. Finally, the softened fragments slide into the feed inlet 6 of the shredding box 1 via an inclined guide plate 82, and excess steam is discharged through strip-shaped vents 83 to prevent condensation buildup.

[0044] The fragments enter the crushing chamber through the feed inlet 6 and fall naturally to the meshing area of ​​the double crushing rollers 3 under gravity. The drive module is activated, and the servo motor drives the main gear, which in turn drives the two crushing rollers 3 to rotate in opposite directions through the meshing driven gear. Due to the interlocking teeth of the two rollers, shearing force and compressive stress are applied to the fragments, tearing large fragments into fiber bundles. At the same time, the conical design of the crushing chamber forms a progressive compression space. The upper space is larger, allowing the fragments to be initially crushed; the lower space is narrower, increasing the pressure between the rollers and achieving fine dissociation of fibers. The crushed short fibers are discharged through the bottom discharge outlet 7 and enter the subsequent melt granulation process.

[0045] Through the above technical solutions, on the one hand, the polyester fragments are precisely temperature-controlled by the steam softening component 81 to reduce the toughness of the raw materials, thereby significantly reducing the mechanical stress required for the subsequent crushing process. Specifically, the dual crushing rollers 3 form a progressive compression space in the conical cavity, and the fragments are naturally graded and refined under the action of gravity. The upper space completes the initial crushing, while the lower narrow space enhances the interlocking force between the rollers, ensuring that the fibers are fully dissociated and avoiding over-crushing. This not only shortens the processing cycle but also ensures the length uniformity and morphological integrity of the recycled short fibers, making them suitable for direct use in spinning regeneration. On the other hand, steam pretreatment reduces crushing resistance from the source, significantly reduces tool wear, and extends the life of core components. The inclined guide plate 82 and vent design of the pretreatment box 8 guide the material while quickly expelling residual steam, preventing high-temperature steam from corroding the box body and improving stability.

[0046] A pressing component 9 is installed inside the feed inlet 6. The pressing component 9 is used to press the pre-treated polyester clothing fragments against the crushing roller 3 inside the crushing chamber to accelerate the crushing of the polyester clothing fragments. Two pressing components 9 are symmetrically arranged, and the two horizontal shafts 95 are integrally fixedly connected into a whole.

[0047] The pressing assembly 9 includes: an automatic telescopic rod 91, the cylinder part of which is located inside the power box 2, the telescopic end of which is fixed to the slide plate 92, the slide plate 92 being slidably connected to the slide groove 93, the slide groove 93 being located on the inner side wall of the crushing box 1, the slide groove 93 being provided with an L-shaped groove 94, the short side of which is vertically arranged, the long side of which is horizontally arranged, and a horizontal shaft 95 being slidably connected inside the L-shaped groove 94;

[0048] The end of the horizontal shaft 95 passes through the slide plate 92 and is fixed with the lifting column 96. The bottom of the lifting column 96 is fixed with the counterweight pressing plate 97. The counterweight pressing plate 97 is located directly above the biting area of ​​the two crushing rollers 3. An inclined groove 98 is provided on the slide plate 92 at the position corresponding to the horizontal shaft 95.

[0049] After the counterweight pressing plate 97 moves down to the bottom, there is a gap between it and the crushing roller 3.

[0050] Initially, the counterweight pressing plate 97 is positioned high on the right side above the crushing roller 3, maintaining a certain distance from it to avoid obstructing the falling fragments from the feed inlet 6. When the pre-treated fragments slide into the feed inlet 6 via the inclined guide plate 82 and accumulate above the biting area of ​​the crushing roller 3, the controller triggers the automatic telescopic rod 91: the telescopic end of the automatic telescopic rod 91 retracts, causing the slide plate 92 to slide horizontally along the chute 93. During the sliding of the slide plate 92, the inclined groove 98 remains in contact with the horizontal shaft 95, forcing the horizontal shaft 95 to slide along the L-shaped groove 94. The long side moves horizontally until the horizontal axis 95 moves to the vertical short side of the L-shaped groove 94. At this time, the inclined groove 98 is connected to the short side of the L-shaped groove 94. The horizontal axis 95 moves down and drives the counterweight pressing plate 97 to move down synchronously through the lifting column 96. As the counterweight pressing plate 97 gradually approaches the fragments, its own weight and the downward thrust work together to compact the accumulated fragments and push them towards the biting area of ​​the crushing roller 3, ensuring that the fragments are promptly rolled into the space between the two rollers for shearing and crushing. When the counterweight pressing plate 97 moves down to the lowest point, it maintains a preset distance from the crushing roller 3.

[0051] The automatic telescopic rod 91 extends again to push the slide plate 92. The sliding of the slide plate 92 causes the horizontal shaft 95 to move upward under the action of the inclined groove 98 until it enters the long side of the L-shaped groove 94, which is in the horizontal direction. At this time, the vertical force of the inclined groove 98 on the horizontal shaft 95 disappears, and the horizontal shaft 95 slides horizontally along the long side, driving the counterweight pressing plate 97 to move away from the crushing roller 3 to avoid interference with the rotating crushing roller 3. The above actions are repeated when the fragments accumulate again.

[0052] Through the above technical solution, on the one hand, in order to solve the problem that the pre-treated polyester fragments are in a fluffy state due to steam softening and easily float above the crushing roller 3 when falling by gravity alone, and cannot enter the biting area in time, thus interrupting the crushing rhythm, the pressing component 9 can compact the fluffy fragments and force them to the contact point of the crushing roller 3 by actively pressing down the counterweight pressing plate 97, ensuring that the fragments are continuously sheared, avoiding the blockage of the feed inlet 6, and improving the continuity of the crushing process; on the other hand, the polyester fragments have reduced toughness after being softened by steam, but may still be bounced off by the crushing roller 3 due to their high fluffiness, forming incompletely cut long and thin fibers; therefore, the downward pressure of the counterweight pressing plate 97 can counteract the rebound force of the fragments, forcing the fragments to penetrate into the biting area of ​​the two rollers, ensuring that the shearing force is fully applied to the fiber bundle, reducing the residue of long and thin fibers caused by insufficient biting, and improving the morphological uniformity of short fibers after crushing.

[0053] Meanwhile, the cooperation between the L-shaped groove 94 and the inclined groove 98 ensures that the pressing plate can move accurately down to the top of the crushing roller 3, while the horizontal section guides the pressing plate to avoid the next batch of fragments in time after the pressure is applied, simplifying the structure and reducing energy consumption. The preset interval between the counterweight pressing plate 97 and the crushing roller 3 avoids rigid contact in the structure, which not only prevents the pressing plate from being damaged by the crushing roller 3, but also avoids the crushing roller 3 from being over-compressed by the fragments, thus reducing the risk of overload.

[0054] A ramp 10 is fixedly installed on one side of the slide plate 92. The angle between the inclined guide plate 82 and the inner wall of the pretreatment box 8 forms a shielding space 11, which shields the counterweight pressing plate 97 when it is not in operation.

[0055] The inclined guide plate is rotatably mounted on the inner wall of the pretreatment box 8 via a hinge shaft. The top of the inclined plate 10 is set as a bent structure 12 and contacts the free end of the inclined guide plate 82. Through the left and right displacement of the inclined plate 10, the inclined guide plate 82 is pushed to adaptively adjust its angle according to the working state of the counterweight pressing plate 97.

[0056] The inclined guide plate 82 is also provided with a number of evenly distributed protrusions 16, which are staggered with the strip-shaped air holes 83;

[0057] The free end of the inclined guide plate 82 is also hinged with a pull rope 13. The other end of the pull rope 13 passes through the pretreatment box 8 and the crushing box 1 and is located directly below the biting area of ​​the two crushing rollers 3, and is fixedly connected to an arched part 15. By changing the angle of the inclined guide plate, the arched part 15 is pulled up and down.

[0058] As the counterweight plate moves to the left along with the slide plate 92 to the meshing area of ​​the two crushing rollers 3, it drives the inclined plate 10 to actively push the inclined guide plate 82, causing the inclined guide plate 82 to deflect upward.

[0059] When the counterweight plate is pressed to the right to reset, the inclined plate 10 moves to the right with the slide plate 92 and gradually releases the pushing action on the inclined guide plate 82. Under the action of gravity, the inclined guide plate 82 swings back down around the hinge axis to reset to the initial angle.

[0060] In this invention, by combining the inclined plate 10 and the inclined guide plate 82, the angle change of the inclined plate 10 directly affects the inclined guide plate 82 during the left-right movement of the sliding plate 92. This results in a smaller tilt angle of the inclined guide plate 82 when the pressing component 9 is working, allowing less or no pre-treated fragments to flow into the crushing chamber, thus reducing the continuous influx of a large amount of fragments into the area where the pressing and crushing rollers 3 work together, causing interference. Simultaneously, when the tilt angle of the inclined guide plate 82 increases, the guide plate and the inner wall of the pre-treatment box 8 are... A stable triangular shielding space 11 is formed between the two sides, which completely covers the counterweight pressing plate 97 to prevent material adhesion. This shields the pressing component 9 when it is not in operation, thereby accelerating the flow of fragments into the crushing chamber while avoiding contact with the pressing component 9 as much as possible, so as to avoid jamming of the moving part of the pressing component 9. In order to avoid accidents, multiple through holes can be provided on the chute 93 in this invention. By connecting an external air pump, air pipe and air nozzle, the chute 93 can be cleaned by air jetting at regular intervals after the air nozzle is connected to the outer end of the pipe through hole, so as to reduce the probability of jamming of the moving part.

[0061] Inside the pretreatment box 8, the polyester fragments softened by steam slide on the surface of the guide plate. The structure of the 3-5mm high raised strips 16 and the strip-shaped vent holes 83, which are distributed alternately, lifts and flips the fragments, promoting the discharge of residual steam from the vent holes. The fragments slide slowly toward the feed inlet 6. The pull rope 13 is wrapped around the outside of the pretreatment box 8 and the crushing box 1, which can reduce interference with the internal structure. At the same time, rope sleeves 14 are provided at the penetration points of the pull rope 13 into the pretreatment box 8 and the crushing box 1 to reduce wear and improve service life.

[0062] Meanwhile, the angle change of the inclined guide plate 82 is used to achieve periodic traction of the pull rope 13. When the angle decreases, the pull rope 13 is pulled, which causes the arched part 15 to move upward and the distance between the arched part 15 and the two crushing rollers 3 to be closer. With the combined action of the pressing component 9 and the two crushing rollers 3, the fragments are crushed into short fibers as much as possible instead of producing more long and thin fibers. Then, the crushed short fiber part impacts the arched part 15, thereby passively breaking it apart, reducing the probability of clumping after crushing into short fibers, and comprehensively improving the overall crushing effect.

[0063] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A pulverizing device for recycled polyester staple fibers, comprising: The crushing box and controller are provided. A power box is located on one side of the crushing box, and a drive module is installed inside the power box. Two interlocking crushing rollers are installed inside the crushing box. The feature is that a rotary cloth shredder is installed on one side of the shredder, which processes polyester clothing into fragments and then conveys the shredded cloth to a pretreatment box at the top of the shredder via an elevator. The pretreatment box is connected to the feed inlet at the top of the shredder, and the discharge outlet is located at the bottom of the shredder. The middle part of the shredder is set as a shredding chamber, and the shredding roller is located in the shredding chamber. The inner diameter of the feed inlet is larger than that of the discharge outlet, and the inner diameter of the shredding chamber gradually decreases from top to bottom. The pretreatment chamber is equipped with a steam softening component; The steam softening unit can spray 60-80℃ steam onto the sheared fragments. The bottom of the pretreatment box is equipped with an inclined guide plate with strip-shaped ventilation holes on the surface of the inclined guide plate to discharge excess steam and guide the material into the feed inlet. The steam softening assembly includes: The steam generating unit includes a steam storage tank and an electric heating steam generator located inside the steam storage tank. A solenoid valve is installed at the outlet of the steam storage tank. The steam generating unit is located on one side of the pulverizing box. The steam injection unit includes an annular steam main pipe and multiple branch nozzles. The annular steam main pipe is arranged circumferentially along the top of the inner side wall of the pretreatment box. The outlet of the steam storage tank is connected to the annular steam main pipe through a hose. The branch nozzles are set on the annular steam main pipe and tilted downward so that the steam ejected from the branch nozzles covers the polyester clothing fragments. A pressing component is installed inside the feed inlet. The pressing component is used to press the pre-treated polyester clothing fragments towards the crushing roller in the crushing chamber to accelerate the crushing of the polyester clothing fragments. The pressing assembly includes: an automatic telescopic rod, the cylinder part of which is located inside the power box, the telescopic end of which is fixed to the slide plate, the slide plate being slidably connected to the chute, the chute being located on the inner side wall of the crushing box, the chute being provided with an L-shaped groove, the short side of which is vertically set and the long side of which is horizontally set, and a horizontal shaft being slidably connected inside the L-shaped groove. The end of the horizontal shaft passes through the slide plate and is fixed to the lifting column. The bottom of the lifting column is fixed to the counterweight pressing plate, which is located directly above the meshing area of ​​the two crushing rollers. An inclined groove is provided on the slide plate at the position corresponding to the horizontal shaft. When the counterweight pressing plate moves down to the bottom, there is a gap between it and the crushing roller. An inclined plate is fixed on one side of the slide plate. The angle between the inclined guide plate and the inner side wall of the pretreatment box forms a shielding space to shield the counterweight pressing plate when it is not in operation. The inclined guide plate is rotatably mounted on the inner wall of the pretreatment box via a hinge shaft. The top of the inclined plate is set as a bent structure and contacts the free end of the inclined guide plate. Through the left and right displacement of the inclined plate, the inclined guide plate is pushed to adaptively adjust the angle according to the working state of the counterweight pressing plate. The inclined guide plate is also provided with multiple evenly distributed convex strips, which are interspersed with strip-shaped air vents; The free end of the inclined guide plate is also hinged with a pull rope. The other end of the pull rope passes through the pretreatment box and the crushing box and is located directly below the biting area of ​​the two crushing rollers, and is fixedly connected to an arched component. By changing the angle of the inclined guide plate, the arched component is pulled up and down.

2. The pulverizing device for recycled polyester staple fibers according to claim 1, characterized in that, The drive module includes a servo motor, which is installed in the power box. The servo motor is connected to the main gear, which meshes with the driven gear. The main gear and the driven gear are respectively fixed to the connecting shafts of the two crushing rollers, so that the servo motor drives the two crushing rollers to mesh and crush the raw materials.

3. The pulverizing device for recycled polyester staple fibers according to claim 2, characterized in that, There are two symmetrically arranged pressing components, and the two horizontal axes are fixedly connected as a whole.

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