Multistage crushing device based on recycling of waste plastics

Abstract

This invention provides a multi-stage crushing device for the recycling of waste plastics, relating to the field of waste plastic recycling technology. It includes: a main body; a feeding hopper mounted on the top surface of the main body, and a crushing roller and linkage rod assembly installed inside the main body; a crushing control box mounted on the top surface of the main body; a bottom box mounted at the bottom of the crushing control box, and a crushing chamber installed inside the bottom box; a fixed side plate on the left side of the crushing chamber, an arc-shaped screen plate inside the crushing chamber, a crushing shaft with crushing blades mounted below the arc-shaped screen plate, and a rotatable feeding plate mounted at the bottom of the crushing chamber. In use, the plastic parts to be crushed are fed between the interlocking plates, and the plastic is crushed sequentially by the interlocking plates, the crushing roller, and the crushing shaft. The crushed plastic fragments achieve a more uniform particle size, overcoming the limitation of single-stage crushing in achieving uniform particle size.

Description

Technical Field

[0001] This invention relates to the technical field of waste plastic recycling, specifically to a multi-stage crushing device for waste plastic recycling. Background Technology

[0002] The key step in recycling waste plastics is crushing, which requires breaking large, mixed plastic waste such as packaging film, plastic bottles, and industrial scraps into uniform, fine particles or fragments before they can be used for subsequent granulation and regeneration.

[0003] However, existing waste plastic crushing equipment has many drawbacks: First, the crushing stages are insufficient and the particle size is uneven. Traditional equipment mostly uses single-stage or two-stage crushing. Large pieces of plastic directly entering the fine crushing stage can easily cause blade entanglement and equipment overload. Tough plastics have strong ductility at room temperature, and single-stage crushing is difficult to achieve uniform particle size, requiring multiple re-crushing processes, resulting in low processing efficiency. Second, static electricity is a prominent problem. During the plastic crushing process, static electricity is generated due to friction, causing plastic particles to agglomerate and adhere to the inner wall of the equipment and impurities. This not only affects the uniformity of crushing but also poses a safety hazard of electrostatic discharge igniting dust. Third, the efficiency of graded collection is low. Traditional equipment mostly collects at a single level and cannot adjust the particle size according to subsequent recycling needs. Moreover, the graded collection and crushing processes are independent, and the path for unqualified particles to return to crushing is long, time-consuming, and labor-intensive. Summary of the Invention

[0004] This invention discloses a multi-stage crushing device based on the recycling of waste plastics, which solves the problems of single-stage crushing being difficult to achieve uniform particle size, static electricity affecting the uniformity of crushing, and the independence of the graded collection and crushing processes.

[0005] In a first aspect, this disclosure provides a multi-stage crushing device for recycling waste plastics, specifically comprising: a main body, a crushing control box, and a bottom box; a feeding hopper is installed on the top surface of the main body, and a crushing roller and a linkage rod assembly are installed inside the main body; the crushing control box is installed on the top surface of the main body; the bottom box is installed at the bottom of the crushing control box, and a crushing chamber is installed inside the bottom box; a fixed side plate is provided on the left side of the crushing chamber, an arc-shaped screen plate is provided inside the crushing chamber, a crushing shaft with crushing blades is installed below the arc-shaped screen plate, and a rotatable feeding plate is installed at the bottom of the crushing chamber; a fixing member is fixedly connected to the outer end face of the fixed side plate, and an air bladder is installed inside the fixed side plate; the linkage rod assembly consists of two first linkage rods and two second linkage rods.

[0006] In at least some embodiments, a connecting frame is fixedly provided on the top of the main body of the device, and an installation plate is fixedly connected inside the connecting frame. A protective plate is fixedly and vertically provided on the top of the connecting frame. The opening of the connecting frame is radially downward and closed. The protective plate protects the upper part of the connecting frame and the components installed on the top surface of the installation plate. The connecting frame can guide the initially crushed plastic to the middle position of the main body of the device for downward feeding. While concentrating the feeding, it also increases the feeding distance, thereby avoiding the accumulation of plastic fragments.

[0007] In at least some embodiments, the hopper is internally equipped with an mounting plate, a rotating shaft, a fixed seat, a hydraulic rod, and a snapping plate. Two mounting plates are fixedly installed, with a gap between them. A fixed slide rail is fixedly installed on the top surface of each mounting plate. The rotating shaft is mounted above the mounting plates, and both ends of the shaft are connected to the inner wall of a connecting frame via bearings. A drag block is sleeved on the rotating shaft. The outer end of the drag block is fixedly connected to a push rod of a monorail cylinder mounted on the mounting plate. A groove is formed at the bottom of the drag block, and the fixed slide rail is engaged inside the groove. The fixed seat is fixedly connected to the top surface of the mounting plate. The fixed end of the hydraulic rod is mounted on the fixed seat, and the moving end of the hydraulic rod is connected to a connecting plate via the rotating shaft. The connecting plate is fixedly connected to the snapping plate, and the bottom of the snapping plate is connected to the rotating shaft. The biting surfaces of the biting plates are equipped with oblique biting teeth. When the hydraulic rod is activated by the control terminal inside the crushing control box, the hydraulic rod pushes the connecting plate to move, causing the biting plates to bite together. Large plastic parts placed between the biting plates are initially crushed. The crushed parts fall from the gap between the two mounting plates into the connecting frame for further crushing. When the plastic parts to be crushed do not require initial biting crushing, the monorail cylinder is activated by the control terminal inside the crushing control box to move the drag block, so that the distance between the rotating shafts can be widened, fully exposing the distance between the mounting plates. By controlling the hydraulic rod to keep the biting plates in an open state, plastic parts can be directly placed between the mounting plates for crushing. The choice of whether to use biting crushing can be flexibly made according to the size of the plastic parts to be crushed.

[0008] In at least some embodiments, the crushing control box is equipped with a controller, a crushing roller, a drive motor, a transmission belt, and a control panel connected to the top surface of the bottom box. The controller is connected to each electrical component via a circuit. The crushing roller is equipped with blades, and there are two crushing rollers that rotate in opposite directions through gear meshing. The drive shaft of the drive motor is coaxially connected to one of the crushing rollers, and a transmission belt is connected to the drive shaft of the drive motor. The other end of the transmission belt is connected to the crushing shaft in the crushing box. The control panel is electrically connected to the controller. After setting relevant parameters such as crushing time and drive motor speed through the control panel, the crushing roller can be started to crush the plastic parts for secondary crushing. The crushed plastic particles fall into the crushing box for the next stage of crushing.

[0009] In at least some embodiments, a collection box is placed at the bottom of the base box. The collection box has four baffles perpendicular to the ground inside. The top of the baffles abuts against the upper inner edge of the base box. The top of the collection box has a protruding locking plate that is engaged with the crossbeam at the bottom of the base box. The baffles are used to block the plastic fragments and ensure that they do not fly to the outside. At the same time, the collection box is formed into a relatively sealed space. The locking plate on the top of the collection box is used to engage it with the bottom line, which serves as a limit. At the same time, the blown-out plastic fragments can be collected in categories for easy subsequent sorting.

[0010] In at least some embodiments, the grinding chamber is internally equipped with a spray bottle, a fixing plate, and a reset rod. Connecting rods with ball-ends are installed on both sides of the grinding chamber, and these connecting rods are swayably connected to the bottom chamber via the ball-ends. The fixing plate is fixedly installed on the upper edges of the front and rear sides of the grinding chamber. A rectangular strip is provided on the top surface of the fixing plate, and a locking strip is slidably engaged on the rectangular strip. A connecting rod is provided between the locking strips, and the two ends of the connecting rod and the outer side of the locking strip are locked by nuts. The spray bottle is engaged inside the fixing plate. A reset push plate is connected internally to the reset rod via a spring, and the top surface of the reset push plate... Connected to the bottom of the linkage rod, the rear reset rod is installed at a higher height than the front reset rod. When the first and second linkage rods move downwards, the linkage rods simultaneously press the reset rods. The reset rod, which is installed at a lower position, moves downwards less, causing the crushing box to tilt. Due to the resistance of the spring and the elastic potential energy, the linkage rods move back and forth. Before the biting plate closes, the crushing box swings left and right, which shakes the plastic parts inside the arc-shaped screen plate of the crushing box to the bottom. The plastic particles are then crushed by the crushing shaft, and the crushed plastic fragments accumulate in the feeding plate.

[0011] In at least some embodiments, a push rod is fixedly installed on the right side of the first linkage rod. The bottom end of the push rod is rotatably connected to a rotating rod via a shaft. The end of the rotating rod is rotatably connected to the feeding plate via a shaft. A pressure rod is welded to the first linkage rod and the second linkage rod respectively. The pressure rod is located directly above the pressure handle of the spray bottle. When the first linkage rod and the second linkage rod move downward, the pressure rod presses the spray bottle to spray out deionized water to eliminate static electricity. At the same time, the bottom end of the first linkage rod pulls the feeding plate open via the rotating rod, discharging the crushed plastic fragments. The reset plate is reset upward by the spring and drives the linkage rod to move upward and reset, while simultaneously pulling the feeding plate to reset. Alternatively, the spring can be replaced with an electrically driven telescopic sleeve rod. When compressed and contracted, it is activated by a pressure sensor installed on the top and extends upward to reset. This can improve the reset efficiency and increase the force of pulling the feeding plate, ensuring that the opening and closing angle of the feeding plate is larger and smoother.

[0012] In at least some embodiments, a connecting frame is fixedly welded to the fixing member. A retaining bracket and a gear are installed at the end of the connecting frame. The retaining brackets are arranged in pairs, upper and lower groups. Each group of retaining brackets has an irregularly shaped through hole inside. A rack rod is engaged inside the irregularly shaped through hole, meshing with the gear. A pressing rod is fixedly installed at the end of the upper rack rod, and a pressure plate is installed at the end of the pressing rod. The pressure plate adheres to the surface of the airbag. When the feeding plate is pulled open to feed material, it pushes the lower rack rod outward, causing the gear to rotate. Through the meshing belt... The upper rack moves inward, simultaneously driving the pressing rod and pressure plate to move inward, squeezing the airbag. The airbag blows out gas, and the plastic fragments are blown away as the feeding plate is fed downward. The lighter and smaller plastic fragments fall into the collection box away from the crushing chamber, so as to achieve graded collection of plastic fragments while feeding. After the feeding plate is reset and closed, no pressure is applied to the airbag. When the airbag returns to its original shape by its own elasticity, it pushes the pressure rod to move in the opposite direction to reset, and the lower rack moves back to its original position through the gear.

[0013] This invention provides a multi-stage crushing device based on the recycling of waste plastics, which has the following beneficial effects:

[0014] In use, the plastic parts to be crushed are placed between the interlocking plates. The plastic is crushed sequentially by the interlocking plates, crushing rollers and crushing shaft. The crushed plastic fragments can achieve a more uniform particle size. The interlocking plates can be selectively used or the interlocking distance and force can be adjusted according to the size of the plastic parts to be crushed, so as to achieve the flexibility of use and ensure that the raw materials for plastic recycling have a uniform particle size.

[0015] In addition, when the first and second linkage rods move downwards, the pressure rod presses the sprayer to spray deionized water to eliminate static electricity, thereby eliminating the static electricity effect on the plastic particles inside the crushing box. The subsequent crushed plastic fragments can be free of static electricity, avoiding affecting the discharge of plastic fragments, and at the same time, it is more conducive to subsequent plastic recycling granulation or other processing steps.

[0016] In addition, when the feeding plate is pulled open to feed material, it pushes the rack rod below to move outward, driving the gear to rotate. Through meshing, the rack rod above moves inward, simultaneously driving the pressing rod and the pressure plate to move inward, squeezing the airbag. The airbag blows out the gas, and the plastic fragments are blown away as the feeding plate is thrown downward. The lighter and smaller plastic fragments fall into the collection box away from the crushing box, so as to achieve the classification and collection of plastic fragments at the same time as feeding, without having to leave the crushing process. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0018] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0019] In the attached diagram:

[0020] Figure 1 A schematic diagram of the main body of the device of the present invention is shown;

[0021] Figure 2 The present invention is shown. Figure 1 A schematic diagram of the structure from the rear side view;

[0022] Figure 3 A schematic diagram of the internal structure of the connecting frame of the present invention is shown;

[0023] Figure 4 A cross-sectional structural schematic diagram of the main body of the device of the present invention is shown;

[0024] Figure 5 A schematic diagram of the linkage assembly of the present invention is shown;

[0025] Figure 6 A schematic diagram of the unfolded structure between the spray bottle and the fixing plate of the present invention is shown;

[0026] Figure 7 The present invention is shown. Figure 5 Enlarged structural diagram at point A;

[0027] Figure 8 A schematic diagram of the structure of the fastener of the present invention is shown;

[0028] Figure 9 A schematic diagram of the structure of the second linkage of the present invention is shown;

[0029] Figure 10 This diagram shows the unfolded structure between the fixed side plate and the feeding plate of the present invention;

[0030] Figure 11 The present invention is shown. Figure 3 A magnified structural diagram at point B in the middle.

[0031] List of reference numerals

[0032] 1. Main body of the device; 11. Connecting frame; 2. Feeding hopper; 21. Mounting plate; 2101. Fixed slide rail; 22. Rotating shaft; 2201. Dragging block; 23. Fixed seat; 24. Hydraulic rod; 2401. Connecting plate; 25. Engaging plate; 3. Crushing control box; 31. Crushing roller; 32. Control panel; 4. Bottom box; 41. Collection box; 5. Crushing box; 501. Feeding plate; 502. Sprayer; 503. Fixed clamping plate; 5031. Locking bar; 504. Reset rod; 5041. Reset push plate; 505. Fixed side plate; 6. Linkage rod assembly; 61. First linkage rod; 6101. Push rod; 62. Second linkage rod; 7. Fixing component; 701. Connecting frame; 7011. Clamping seat; 70111. Pressing rod; 70112. Airbag; 7012. Gear. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0034] Example 1: Please refer to the appendix Figure 1 To be continued Figure 11 :

[0035] This invention proposes a multi-stage crushing device based on the recycling of waste plastics, comprising: a main body 1, a crushing control box 3, and a bottom box 4; a feeding hopper 2 is installed on the top surface of the main body 1, and a crushing roller 31 and a linkage rod assembly 6 are installed inside the main body 1; the crushing control box 3 is installed on the top surface of the main body 1; the bottom box 4 is installed at the bottom of the crushing control box 3, and a crushing box 5 is installed inside the bottom box 4; a fixed side plate 505 is provided on the left side of the crushing box 5, an arc-shaped screen plate is provided inside the crushing box 5, a crushing shaft with crushing blades is installed below the arc-shaped screen plate, and a rotatable feeding plate 501 is installed at the bottom of the crushing box 5; a fixing member 7 is fixedly connected to the outer end face of the fixed side plate 505, and an airbag 70112 is installed inside the fixed side plate 505; the linkage rod assembly 6 consists of two first linkage rods 61 and two second linkage rods 62.

[0036] Please refer to the attached document. Figure 1 and attached Figure 2A connecting frame 11 is fixedly installed on the top of the main body 1 of the device. An installation plate 21 is fixedly connected inside the connecting frame 11. A protective plate is fixedly and vertically installed on the top of the connecting frame 11. The opening of the connecting frame 11 is radially downward and closed. The protective plate protects the top of the connecting frame 11 and the components installed on the top surface of the installation plate 21. The connecting frame 11 can guide the plastic that has been initially crushed to the middle position of the main body 1 of the device and feed it downward. While concentrating the feeding, it increases the feeding distance, thereby avoiding the accumulation of plastic fragments.

[0037] Please refer to the attached document. Figure 2 and attached Figure 4 The crushing control box 3 contains a controller, crushing roller 31, drive motor, transmission belt, and control panel 32 connected to the top of the bottom box 4. The controller is connected to each electrical component via circuitry. The crushing roller 31 is equipped with blades. There are two crushing rollers 31 that rotate in opposite directions through gear meshing. The drive shaft of the drive motor is coaxially connected to one of the crushing rollers 31, and a transmission belt is connected to the drive shaft of the drive motor. The other end of the transmission belt is connected to the crushing shaft in the crushing box 5. The control panel 32 is electrically connected to the controller. After setting relevant parameters such as crushing time and drive motor speed through the control panel 32, the crushing roller 31 can be started to crush the plastic parts for a second time. The crushed plastic particles fall into the crushing box 5 for the next stage of crushing.

[0038] Please refer to the attached document. Figure 1 and attached Figure 5 A collection box 41 is placed at the bottom of the base box 4. Inside the collection box 41, there are four baffles perpendicular to the ground. The top of the baffles rests against the upper inner edge of the base box 4. The top of the collection box 41 is provided with a protruding latch plate, which is engaged with the crossbeam at the bottom of the base box 4. The baffles are used to block the plastic fragments and ensure that they do not fly to the outside. At the same time, the collection box 41 is formed into a relatively sealed space. The latch plate on the top of the collection box 41 is used to engage it in the base box 4, which serves as a limit. At the same time, the blown-out plastic fragments can be collected in categories for easy sorting later.

[0039] Please refer to the attached document. Figure 3 and attached Figure 11The feeding hopper 2 is internally equipped with an mounting plate 21, a rotating shaft 22, a fixed seat 23, a hydraulic rod 24, and a snapping plate 25. Two mounting plates 21 are fixedly installed, with a gap between them. A fixed slide rail 2101 is fixedly installed on the top surface of the mounting plate 21. The rotating shaft 22 is installed above the mounting plate 21, and both ends of the rotating shaft 22 are connected to the inner wall of the connecting frame 11 via bearings. A drag block 2201 is sleeved on the rotating shaft 22, and the outer end of the drag block 2201 is fixedly connected to the push rod of a monorail cylinder fixed on the mounting plate 21. A groove is opened at the bottom of the drag block 2201, and the fixed slide rail 2101 is engaged inside the groove. The fixed seat 23 is fixedly connected to the top surface of the mounting plate 21. The fixed end of the hydraulic rod 24 is installed on the fixed seat 23, and the moving end of the hydraulic rod 24 is connected to a connecting plate 2401 via a rotating shaft. The connecting plate 2401 is fixedly connected to the snapping plate 25, and the bottom of the snapping plate 25 is connected to... Connected to the rotating shaft 22, the biting surface of the biting plate 25 is provided with oblique biting teeth. When the hydraulic rod 24 is activated by the control terminal inside the crushing control box 3, the hydraulic rod 24 pushes the connecting plate 2401 to move, so that the biting plate 25 bites together. Large plastic parts placed between the biting plates 25 are bitten together for preliminary crushing. The crushed parts fall from the gap between the two mounting plates 21 into the connecting frame 11 for further crushing. When the plastic parts to be crushed do not need preliminary biting crushing, the monorail cylinder is activated by the control terminal inside the crushing control box 3 to drive the drag block 2201 to move, so that the gap between the rotating shafts 22 can be widened, and the gap between the mounting plates 21 can be fully exposed. By controlling the hydraulic rod 24 to keep the biting plate 25 in an open state, the plastic parts can be directly placed between the mounting plates 21 for crushing. The use of biting crushing can be flexibly selected according to the size of the plastic parts to be crushed.

[0040] Please refer to the attached document. Figure 5 Appendix Figure 6 Appendix Figure 7 and attached Figure 9The grinding chamber 5 contains a spray bottle 502, a fixing plate 503, and a reset rod 504. Connecting rods with ball-ends are installed on both sides of the grinding chamber 5, and these connecting rods are swayably connected to the bottom chamber 4 via the ball-ends. The fixing plate 503 is fixedly installed on the upper edges of the front and rear sides of the grinding chamber 5. A rectangular strip is provided on the top surface of the fixing plate 503, and a locking strip 5031 is slidably engaged on the rectangular strip. A connecting rod is provided between the locking strips 5031, and the two ends of the connecting rod and the outer side of the locking strips 5031 are locked with nuts. The spray bottle 502 is engaged inside the fixing plate 503. A reset push plate 5041 is connected inside the reset rod 504 via a spring. The top surface of 41 is connected to the bottom surface of the linkage rod. The installation height of the rear reset rod 504 is higher than that of the front reset rod 504. When the first linkage rod 61 and the second linkage rod 62 move downward, the linkage rod presses the reset rod 504 at the same time. The reset rod 504, which is installed at a lower position, moves downward less, causing the crushing box 5 to tilt. Affected by the resistance of the spring and the elastic potential energy, the linkage rod moves back and forth. Before the biting plate 25 closes, the crushing box 5 swings left and right, which can shake the plastic parts in the arc-shaped screen plate inside the crushing box 5 to the bottom. The plastic particles are crushed by the crushing shaft, and the crushed plastic fragments are piled up in the feeding plate 501.

[0041] Please refer to the attached document. Figure 8 and attached Figure 10 A connecting frame 701 is fixedly welded to the fixing component 7. A retainer 7011 and a gear 7012 are installed at the end of the connecting frame 701. The retainers 7011 are divided into upper and lower groups of two. Each group of retainers 7011 has an irregularly shaped through hole inside, through which a rack rod is engaged. The rack rod meshes with the gear 7012. A pressing rod 70111 is fixedly installed at the end of the upper rack rod, and a pressure plate is installed at the end of the pressing rod 70111. The pressure plate adheres to the surface of the airbag 70112. When the feeding plate 501 is pulled open to feed material, it pushes the lower rack rod outward, causing the gear 7012 to rotate. Through meshing, the upper rack rod... The rack and pinion moves inward, simultaneously driving the pressing rod 70111 and the pressure plate to move inward, squeezing the airbag 70112. The airbag 70112 blows out gas, and the plastic fragments are blown away as the feeding plate 501 is fed downward. The lighter and smaller plastic fragments fall into the collection box 41 at a position away from the crushing box 5, so as to achieve graded collection of plastic fragments while feeding. After the feeding plate 501 is reset and closed, no pressure is applied to the airbag 70112. When the airbag 70112 returns to its original shape by its own elasticity, it pushes the pressing rod 70111 to move in the opposite direction and reset through the gear 7012 to achieve the reset of the rack and pinion below.

[0042] Please refer to the attached document. Figure 3 and attached Figure 11A push rod 6101 is fixedly installed on the right side of the first linkage rod 61. The bottom end of the push rod 6101 is rotatably connected to a rotating rod via a shaft. The end of the rotating rod is rotatably connected to the feeding plate 501 via a shaft. Pressure rods are welded to the first linkage rod 61 and the second linkage rod 62 respectively. The pressure rods are located directly above the pressure handle of the spray bottle 502. When the first linkage rod 61 and the second linkage rod 62 move downward, the pressure rods press the spray bottle 502 to spray out deionized water to eliminate static electricity. At the same time, the bottom end of the first linkage rod 61 pulls the feeding plate 501 open via the rotating rod, discharging the crushed plastic fragments. The reset push plate 5041 is reset upward by the spring and drives the linkage rod to move upward and reset, while simultaneously pulling the feeding plate 501 to reset.

[0043] In another embodiment, the spring can be replaced with an electrically driven telescopic sleeve. When compressed and contracted, it is activated by a pressure sensor installed on the top and extends upward to reset. This can improve the reset efficiency and increase the pulling force on the feeding plate 501, ensuring that the opening and closing angle of the feeding plate 501 is larger and smoother.

[0044] The working principle of this embodiment is as follows: First, the biting speed of the biting plate 25 and the speed of the drive motor are set through the control panel 32. The plastic parts to be crushed are put between the biting plates 25. The hydraulic rod 24 pushes the biting plates 25 to crush the plastic parts. The crushed plastic parts are put into the connecting frame 11 and sheared by the crushing roller 31. The crushed plastic particles fall onto the arc-shaped screen plate of the crushing box 5. As the biting plates 25 open and close, the linkage rod moves, pushing the arc-shaped screen plate to swing back and forth, shaking the plastic particles to the bottom. The drive shaft of the drive motor drives the transmission belt to rotate the crushing shaft. The blade crushes the plastic particles again. The crushed plastic fragments are collected on the feeding plate 501. As the linkage rod moves back and forth, the feeding plate 501 opens and closes repeatedly, thereby discharging the plastic fragments. At the same time as discharging, the feeding plate 501 presses the rack rod to move. The gear 7012 drives the pressing rod 70111 to move. The pressure plate squeezes the air bag 70112 to achieve the graded collection of plastic fragments during discharge.

Claims

1. A multi-stage crushing device for recycling waste plastics, including: The device comprises a main body (1), a crushing control box (3), and a bottom box (4); characterized in that a feeding hopper (2) is installed on the top surface of the main body (1), and a crushing roller (31) and a linkage rod assembly (6) are installed inside the main body (1); the feeding hopper (2) is equipped with an mounting plate (21), a rotating shaft (22), a fixed seat (23), a hydraulic rod (24), and a biting plate (25); two mounting plates (21) are fixedly arranged, with a gap between the two mounting plates (21), and... A fixed slide rail (2101) is fixedly installed on the top surface of the mounting plate (21). A rotating shaft (22) is installed above the mounting plate (21). Both ends of the rotating shaft (22) are connected to the inner wall of the connecting frame (11) through bearings. A drag block (2201) is sleeved on the rotating shaft (22). The outer end of the drag block (2201) is fixedly connected to the push rod of the monorail cylinder installed on the top surface of the mounting plate (21). A slide groove is opened at the bottom of the drag block (2201). The fixed slide rail (2101) is engaged inside the slide groove. The fixed seat (2) 3) The hydraulic rod (24) is fixedly connected to the top surface of the mounting plate (21). The fixed end of the hydraulic rod (24) is installed on the fixed seat (23). The moving end of the hydraulic rod (24) is connected to a connecting plate (2401) through a rotating shaft. The connecting plate (2401) is fixedly connected to the biting plate (25). The bottom of the biting plate (25) is connected to the rotating shaft (22). The biting surface of the biting plate (25) is provided with oblique biting teeth. The crushing control box (3) is installed on the top surface of the main body (1) of the device. The crushing control box (3) is located inside the device. The unit is equipped with a controller, a crushing roller (31), a drive motor, a transmission belt, and a control panel (32) connected to the top surface of the bottom box (4). The drive shaft of the drive motor is coaxially connected to a crushing roller (31), and a transmission belt is connected to the drive shaft of the drive motor. The other end of the transmission belt is connected to the crushing shaft in the crushing box (5). The control panel (32) is electrically connected to the controller. The bottom box (4) is installed at the bottom of the crushing control box (3), and the crushing box (5) is installed inside the bottom box (4).The crushing box (5) is equipped with connecting rods with ball-shaped ends on both sides. The connecting rods are oscillatingly connected to the bottom box (4) through the ball-shaped ends. Inside the crushing box (5) are a spray bottle (502), a fixing plate (503), and a reset rod (504). The spray bottle (502) is snapped into the inside of the fixing plate (503). The fixing plate (503) is fixedly set on the upper edge of the front and rear sides of the crushing box (5). A rectangular strip is provided on the top surface of the fixing plate (503). A locking strip (5031) is slidably snapped onto the rectangular strip. A connecting rod is provided between the locking strips (5031). The outer side of the end and locking bar (5031) is locked with a nut. The reset rod (504) is connected to the reset push plate (5041) by a spring. The top surface of the reset push plate (5041) is connected to the bottom surface of the linkage rod. The installation height of the rear reset rod (504) is higher than that of the front reset rod (504). A fixed side plate (505) is provided on the left side of the crushing box (5). An arc-shaped screen plate is provided inside the crushing box (5). A crushing shaft with crushing blades is installed below the arc-shaped screen plate. A rotatable feeding plate (501) is installed at the bottom of the crushing box (5). The fixed side plate (505) is provided on the left side of the crushing box (5). A fixing member (7) is fixedly connected to the outer end face of the side plate (505), and an airbag (70112) is installed inside the fixed side plate (505); the linkage rod assembly (6) consists of two first linkage rods (61) and two second linkage rods (62). A push rod (6101) is fixedly installed on the right side of the first linkage rod (61). The bottom end of the push rod (6101) is rotatably connected to a rotating rod through a shaft. The end of the rotating rod is rotatably connected to the feeding plate (501) through a shaft. Pressure rods are welded to the first linkage rod (61) and the second linkage rod (62) respectively. The pressure rods are located at the spray bottle (502). Above the pressure handle; a connecting frame (701) is fixedly welded to the fixing component (7). A card seat (7011) and a gear (7012) are installed at the end of the connecting frame (701). The card seats (7011) are divided into two groups, upper and lower. The interior of the two groups of card seats (7011) is provided with irregular through holes. A rack rod is engaged inside the irregular through holes. The rack rod meshes with the gear (7012). A pressing rod (70111) is fixedly installed at the end of the upper rack rod. A pressure plate is installed at the end of the pressing rod (70111). The pressure plate is attached to the surface of the airbag (70112).

2. The multi-stage crushing device based on waste plastic recycling according to claim 1, characterized in that, A connecting frame (11) is fixedly installed on the top of the main body (1) of the device. An installation plate (21) is fixedly connected inside the connecting frame (11). A protective plate is fixedly and vertically installed on the top of the connecting frame (11).

3. The multi-stage crushing device based on waste plastic recycling according to claim 1, characterized in that: The controller is connected to each electrical component via a circuit. The crushing roller (31) is equipped with blades. There are two crushing rollers (31) that rotate in opposite directions through gear meshing.

4. The multi-stage crushing device based on waste plastic recycling according to claim 1, characterized in that: A collection box (41) is placed at the bottom of the bottom box (4). Four baffles perpendicular to the ground are set inside the collection box (41). The top of the baffles rests against the upper inner edge of the bottom box (4). A protruding card is set on the top of the collection box (41). The card is attached to the crossbeam at the bottom of the bottom box (4).

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