A waste plastic recycling device and method for chemical recycling raw materials

Abstract

The present invention provides a waste plastic recycling device and method for chemically reusing raw materials, which belongs to the technical field of waste plastic recycling. The recycling device includes a crusher and a cleaning tank. The cleaning tank is provided with a material pressing mechanism capable of pressing plastic fragments into water, and the material pressing mechanism includes a conveyor, a pressing plate, a floating plate and a slide plate; a plurality of pressing plates are installed at intervals on the conveyor belt of the conveyor; a limit plate is fixedly installed on the cleaning tank, a reset spring is connected between the upper end surface of the floating plate and the limit plate, an extension plate capable of abutting against the pressing plate is provided on the floating plate, and the extension plate and the floating plate are elastically connected; the slide plate is slidably arranged below the floating plate and parallel to the floating plate, a pull rope is connected between the floating plate and the slide plate, and a driving motor drives the slide plate to move back and forth to both ends through a transmission component, so that the floating plate moves up and down. The pressing plate of the present invention can press plastic fragments floating on the water surface into the water, and soak the plastic fragments in the water, thereby improving the cleaning effect of the fragments.

Description

Technical Field

[0001] The present invention relates to the technical field of waste plastic recycling, and in particular to a waste plastic recycling device and method for chemically reusing raw materials. Background Art

[0002] Chemical recycling of plastics is a process of converting waste plastics into useful products through chemical methods. This method can effectively reduce the impact of plastic waste on the environment and provide a sustainable source of raw materials for the plastics industry. Before waste plastic products become chemical recycling plastic raw materials, they need to be pretreated to become chemical recycling raw materials. The pretreatment process includes steps such as classification, crushing, cleaning, drying, magnetic separation, and packaging. For example, the patent document with announcement number CN111673948B discloses a waste plastic recycling production line and processing process. The production line includes a crushing unit and a cleaning unit. The crushing unit tears and crushes the raw materials to form plastic fragments. The plastic fragments are soaked, rinsed, and dried in a cleaning tank, and then the metal substances are removed, and then the plastic fragments are packaged. The purpose of pretreatment is to remove impurities in the plastic, such as dust, dirt, labels, metals, etc., and to classify the plastics for subsequent processing.

[0003] When cleaning crushed plastics, since the density of plastics such as polyethylene and polypropylene is lower than the density of water, when cleaning such plastic fragments, the plastic fragments float on the liquid surface of the cleaning pool, and only one side of the fragments is immersed in water, and the cleaning effect on the other side is poor. For example, the patent document with announcement number CN218775286U discloses a plastic cleaning device, which includes a cleaning pool, in which a plurality of rotating rollers are rotatably connected, and the cleaning pool is provided with a driving component that drives the plurality of rotating rollers to rotate simultaneously, and the rotating rollers are fixedly connected with a plurality of groups of paddles, and the plurality of groups of paddles are arranged along the length direction of the rotating rollers. During cleaning, the driving component drives the rotating rollers to rotate, and the rotation of the rotating rollers drives the paddles to pry the plastics in the cleaning pool, so that the plastics come into contact with the water in the cleaning pool, thereby cleaning the plastics.

[0004] However, since plastics such as polyethylene and polypropylene float on the water, only one side of the fragments is immersed in water, and the cleaning effect on the other side is poor. Although there is a paddle to press them into the water, it is only temporary. After leaving the paddle, the plastic fragments will return to the state of being immersed in water on one side. After the paddle is turned over, the plastic fragments may also be immersed in water on the other side, affecting the cleaning effect of both sides of the plastic fragments. Therefore, it is necessary to develop a waste plastic recycling device and method for chemical recycling raw materials to solve the technical problem in the prior art that the plastic fragments floating on the water surface have a short time to be immersed in water on both sides, which affects the cleaning effect. Summary of the invention

[0005] In view of this, the present invention provides a waste plastic recovery device and method for chemical recycling raw materials, which solves the technical problem that both sides of the plastic fragments are immersed in water for a short time, thus affecting the cleaning effect, by pressing the plastic fragments floating on the water surface into the water and allowing them to soak in the water.

[0006] In order to solve the above technical problems, on the one hand, the present invention provides a waste plastic recycling device for chemical reuse raw materials, including a crusher and a cleaning tank, the cleaning tank having a feed inlet, and a material pressing mechanism capable of pressing plastic fragments into water is provided at a position near the feed inlet on the cleaning tank, the material pressing mechanism comprising a conveyor, a pressing plate, a floating plate and a sliding plate; the conveyor comprises two belt rollers arranged in parallel along the up and down directions of the cleaning tank, a conveyor belt sleeved on the two belt rollers, and a driving motor for driving the belt rollers to rotate; one belt roller is located in the cleaning tank, and the other belt roller is located above the cleaning tank, and a plurality of pressing plates are installed on the conveyor belt at intervals, and an end of the pressing plate connected to the conveyor belt is higher than an end away from the conveyor belt;

[0007] The floating plate is arranged on the side of the conveyor belt away from the feed port, and a limit plate is fixedly installed on the cleaning pool. The upper end surface of the floating plate is elastically connected to the limit plate. The end of the floating plate away from the conveyor belt is higher than the end close to the conveyor belt. The end of the floating plate close to the conveyor belt is provided with an extension plate that can abut against the pressure plate. A return spring is connected between the extension plate and the floating plate. The pressure plate, the extension plate and the floating plate are all provided with a plurality of water holes.

[0008] The slide plate is slidingly arranged below the floating plate and parallel to the floating plate. A pull rope is connected between the floating plate and the slide plate. The driving motor drives the slide plate to move back and forth to both ends through the transmission component, so that the floating plate moves up and down.

[0009] By adopting the above technical solution, the waste plastic is transported to the crusher and crushed into flakes, and then transported to the cleaning pool, the driving motor is started, the conveyor belt drives the pressing plate to move, and the pressing plate presses the plastic fragments into the water. Since the plastic fragments can float on the water surface, the plastic fragments in the water move under the pressing plate, and the pressing plate drives the plastic fragments to soak in the water, so that multiple sides of the plastic fragments are in contact with the water, thereby improving the cleaning effect. The plastic fragments move from the side of the pressing plate conveyor belt close to the feed inlet to the side away from the feed inlet. When the pressing plate moves to abut against the extension plate, the plastic fragments move along the bottom of the extension plate to the bottom of the floating plate. The driving motor drives the slide plate to move back and forth, and the reciprocating movement of the slide plate drives the pull rope to move. When the slide plate moves to the extreme position at both ends, the pull rope drives the float plate to move down, and the reset spring is stretched. When the slide plate moves to the middle position, the float plate moves up under the elastic force of the reset spring to restore the initial position. The float plate beats the plastic fragments during the lifting process, and the fluctuation of the water flow washes the plastic fragments. In addition, the mutual friction between the plastic fragments improves the cleaning effect of the fragments. The pressing plate, the extension plate and the floating plate are all provided with a plurality of water holes, which can allow water to flow through, which is conducive to concentrating the plastic fragments under the pressing plate, the extension plate and the floating plate during the up and down movement of the pressing plate, the extension plate and the floating plate. The pressing plate of the material pressing mechanism of the present invention can press the plastic fragments floating on the water surface into the water, and the plastic fragments follow the pressing plate to move from one side of the conveyor belt to the other side, prolonging the immersion time of the plastic fragments in the water and improving the cleaning effect. When the pressing plate moves to abut against the extension plate, the plastic fragments move along the bottom of the extension plate to the bottom of the floating plate. The floating plate slaps the plastic fragments during the lifting process, and the fluctuation of the water flow washes the plastic fragments. In addition, the mutual friction between the plastic fragments improves the cleaning effect of the fragments.

[0010] Preferably, one belt roller is located below the water surface in the cleaning pool, and the other belt roller is located above the water surface in the cleaning pool. Both belt rollers are rotatably connected to both sides of the cleaning pool. The driving motor is arranged on the outside of the cleaning pool. The outside of the cleaning pool is rotatably connected with a pulley, and a gear 1 is fixedly mounted on the pulley. A gear 2 meshing with the gear 1 is fixedly mounted on the output shaft of the driving motor, and the pulley and the belt roller are connected by a belt drive.

[0011] By adopting the above technical solution, the driving motor drives gear 1 to rotate, gear 1 drives gear 2 to rotate, and then drives the pulley to rotate, the pulley drives the belt roller to rotate, and then drives the conveyor belt to rotate. The two belt rollers are arranged in parallel up and down, and one belt roller is located below the water surface, and the other belt roller is located above the water surface. The belt roller drives the conveyor belt to move, so that the pressure plate on the conveyor belt moves from above the water surface to below the water surface, which is conducive to the pressure plate pressing the plastic fragments floating on the water surface into the water and soaking them in the water, thereby improving the cleaning effect of the plastic fragments.

[0012] Preferably, the transmission component includes a rotating shaft rotatably connected to both sides of the cleaning tank, a plurality of push plates evenly distributed around the rotating shaft, a baffle fixedly connected to the slide plate close to one end of the conveyor belt and capable of contacting the push plate, and two return springs arranged between the end of the slide plate away from the conveyor belt and the side wall of the cleaning tank, and the rotating shaft is fixedly connected to the output shaft of the driving motor.

[0013] By adopting the above technical solution, the driving motor drives the belt roller to rotate and at the same time drives the rotating shaft to rotate, and the rotating shaft drives the push plate to rotate. When the push plate rotates to contact the baffle, the push plate drives the baffle to move, and then drives the slide plate to move. At this time, the reset spring 2 is stretched, and when the push plate rotates to disengage from the baffle, the slide plate moves in the opposite direction to its original position under the elastic force of the reset spring 2 until the next push plate rotates to contact the baffle, driving the baffle to move, so that the slide plate moves back and forth to both ends, and then the float plate moves back and forth up and down through the pull rope and the reset spring 1, so as to beat the plastic fragments, which is beneficial to improve the cleaning effect.

[0014] Preferably, the pressing plate is tilted on the conveyor belt, and the pressing plate tilts upward from an end close to the feed inlet to an end away from the feed inlet; the end of the floating plate away from the feed inlet is higher than the end close to the feed inlet.

[0015] By adopting the above technical solution, the pressure plate and the floating plate are both inclined, and are both inclined upward from the end close to the feed port to the end away from the feed port, which is beneficial for the pressure plate and the floating plate to drive the plastic fragments to move toward the end close to the discharge component, thereby facilitating the output of the cleaned plastic fragments; at the same time, the plastic fragments at the feed port in the cleaning pool are reduced, which facilitates the continued transportation of the plastic fragments to be cleaned to the feed port.

[0016] Preferably, a baffle is fixedly installed in the cleaning pool at a position above the slide plate and close to the pull rope, and the baffle is located between the conveyor belt and the pull rope to increase the downward movement stroke of the floating plate.

[0017] By adopting the above technical solution, when the slide plate moves toward the side close to the conveyor belt, the pull rope is blocked by the barrier rod and changes from an inclined line segment to two bent segments, thereby driving the float plate to increase the downward movement stroke, which is beneficial to prolong the time that the plastic fragments are immersed in water and improve the cleaning effect.

[0018] Preferably, both sides of the skateboard are rotatably connected to multiple connecting rods, the outer sides of the connecting rods are fixedly connected to a paddle plate capable of shifting the water flow, a torsion spring is installed between the connecting rods and the skateboard, and multiple arc-shaped plates capable of limiting the rotation angle of the connecting rods are fixedly installed on the skateboard at the outer sides of the connecting rods, a notch is provided on the arc-shaped plate, the notch has an edge one facing one end of the skateboard close to the feed port and an edge two facing the bottom of the skateboard, the end of the paddle plate is located in the notch, and the torsion spring makes the paddle plate contact edge one of the notch.

[0019] By adopting the above technical solution, the dirt washed from the plastic fragments in the cleaning pool will fall to the bottom of the cleaning pool under the action of its own gravity. Since the slide plate and the floating plate are parallel, the end close to the feed inlet is lower than the end close to the discharge assembly. Due to the limitation of the arc plate, the paddle plate will rotate in the gap. The initial position of the paddle plate is that the paddle plate contacts edge one, that is, the paddle plate is downward. When the slide plate moves toward the end close to the feed inlet, the direction of the water flow resistance encountered by the paddle plate is opposite to the direction of the slide plate movement. Due to the limitation of the arc plate, the paddle plate maintains its initial position and paddles the water flow during the movement of the slide plate, which is conducive to cleaning the dirt at the bottom of the pool. The sliding plate moves toward the side close to the feed inlet; when the sliding plate moves toward the direction close to the discharge component, the paddle plate is subjected to the water flow resistance toward the feed inlet, and the water flow resistance overcomes the force of the torsion spring to deflect the paddle plate, thereby reducing the angle between the paddle plate and the horizontal plane, thereby reducing the paddle plate's shifting of the water flow and reducing the amount of dirt moving toward the side close to the discharge component. The sliding plate moves back and forth, which is conducive to the dirt gathering at the bottom of the cleaning pool close to the feed inlet, making it easier to clean the dirt in the cleaning pool. At the same time, less dirt gathers at the part of the clean water pool located at the discharge component, which is conducive to reducing the dirt adhering to the plastic fragments during discharge.

[0020] Preferably, the cleaning pool has a bottom plate, which is inclined upward from a side close to the feed inlet to a side away from the feed inlet, a slide rail is fixedly installed on the bottom plate, a slide groove is provided on the slide plate, and the slide rail is slidably installed in the slide groove.

[0021] By adopting the above technical solution, the driving motor drives the slide plate to move along the slide rail, and the paddle plate stirs the water flow, which is conducive to the dirt gathering at the bottom of the cleaning pool close to the feed inlet. The end of the bottom plate close to the feed inlet is lower than the end close to the discharge component, which is also conducive to the dirt in the cleaning pool gathering to the bottom close to the feed inlet, making it easier to clean the dirt in the cleaning pool and also helping to reduce the dirt adhering to the plastic fragments during discharge.

[0022] On the other hand, the present invention provides a method for recycling waste plastics for chemical reuse raw materials, using the waste plastics recycling device for chemical reuse raw materials, comprising the following steps:

[0023] Step 1: transport the waste plastic to the crusher and crush it into flakes, then transport it to the cleaning pool, start the drive motor, the conveyor belt drives the pressing plate to move, the pressing plate presses the plastic fragments into the water, and the pressing plate drives the plastic fragments to soak in the water;

[0024] Step 2: When the pressing plate moves to abut against the extension plate, the plastic fragments move along the bottom of the extension plate to the bottom of the floating plate, and the driving motor drives the sliding plate to move back and forth, and then drives the floating plate to rise and fall through the pull rope and the return spring, and the plastic fragments are slapped during the lifting process of the floating plate;

[0025] Step 3: After the plastic fragments are cleaned, the discharging component removes the plastic fragments from the cleaning tank.

[0026] By adopting the above technical solution, the pressing plate presses the plastic fragments floating on the water surface into the water and soaks the plastic fragments in the water, thereby improving the cleaning effect. When the pressing plate moves to abut against the extension plate, the plastic fragments move along the bottom of the extension plate to the bottom of the floating plate. The floating plate hits the plastic fragments during the lifting process, and the fluctuations of the water flow flush the plastic fragments. In addition, the mutual friction between the plastic fragments improves the cleaning effect of the fragments.

[0027] The beneficial effects of the above technical solution of the present invention are as follows:

[0028] 1. The pressing plate of the pressing mechanism of the present invention can press the plastic fragments floating on the water surface into the water. The plastic fragments follow the pressing plate to move from one side of the conveyor belt to the other side, thereby extending the immersion time of the plastic fragments in the water and improving the cleaning effect. When the pressing plate moves to abut against the extension plate, the plastic fragments move along the bottom of the extension plate to the bottom of the floating plate. The floating plate hits the plastic fragments during the lifting process, and the fluctuation of the water flow washes the plastic fragments. In addition, the mutual friction between the plastic fragments improves the cleaning effect of the fragments.

[0029] 2. The pressing plate and the floating plate of the present invention are both inclined, and are both inclined upward from the end close to the feed port to the end away from the feed port, which is beneficial for the pressing plate and the floating plate to drive the plastic fragments to move toward the end close to the discharge component, thereby facilitating the output of the cleaned plastic fragments; at the same time, the plastic fragments at the feed port in the cleaning pool are reduced, which facilitates the continued transportation of the plastic fragments to be cleaned to the feed port.

[0030] 3. The driving motor of the present invention drives the movement of the pressure plate and the skateboard at the same time. The paddle on the skateboard paddles the water flow, which is conducive to the accumulation of dirt at the bottom of the cleaning pool close to the feed inlet, making it easier to clean the dirt in the cleaning pool. At the same time, less dirt accumulates at the part of the discharge component in the clean water pool, which is conducive to reducing the dirt adhering to the plastic fragments during discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic structural diagram of a waste plastic recycling device for chemically reusing raw materials according to the present invention;

[0032] Figure 2 It is a structural schematic diagram of the cleaning pool of the present invention;

[0033] Figure 3 It is a schematic diagram of the structure inside the cleaning pool of the present invention;

[0034] Figure 4 for Figure 3 The enlarged view of point A in the middle;

[0035] Figure 5 for Figure 3 The enlarged view of point B in the middle;

[0036] Figure 6 It is a schematic diagram of the structure of the slide plate in the cleaning pool of the present invention.

[0037] In the figure: 1. crusher; 2. cleaning tank; 21. feed port; 22. bottom plate; 3. material conveyor; 4. pressing mechanism; 41. conveyor; 411. belt roller; 412. conveyor belt; 413. drive motor; 414. gear 1; 415. gear 2; 416. pulley; 42. pressing plate; 421. water hole; 43. floating plate; 431. extension plate; 432. limit plate; 433. reset spring 1; 44. slide plate; 441. slide rail; 442. slide trough; 443. pull rope; 444. baffle rod; 445. connecting rod; 446. dial plate; 447. arc plate; 448. notch; 45. transmission component; 451. rotating shaft; 452. push plate; 453. baffle plate; 454. reset spring 2;

[0038] 5. Discharging assembly; 51. Discharging conveyor; 511. Discharging belt roller; 512. Discharging conveyor belt; 513. Discharging drive motor; 52. Discharging hopper. DETAILED DESCRIPTION

[0039] To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be combined with the embodiments of the present invention. Figure 1-Figure 6 , the technical scheme of the embodiment of the present invention is clearly and completely described. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0040] Example

[0041] This embodiment provides a waste plastic recycling device for chemical recycling raw materials, such as Figure 1 As shown, it includes a crusher 1 and a cleaning tank 2. The waste plastics are crushed into flakes in the crusher 1 and transported to the cleaning tank 2 via a material conveyor 3. After being cleaned in the cleaning tank 2, they enter the next process.

[0042] like Figure 1 As shown, a feed port 21 is provided at one end of the cleaning tank 2, a discharge assembly 5 is provided at the other end, and a pressing mechanism 4 is provided at a portion of the cleaning tank 2 near the feed port 21. The plastic fragments conveyed by the material conveyor 3 enter the cleaning tank 2 through the feed port 21 for cleaning, and the pressing mechanism 4 presses the plastic fragments into water for soaking, and the cleaned plastic fragments are conveyed to the next process through the discharge assembly 5.

[0043] like Figure 3 and Figure 6 As shown, the pressing mechanism 4 includes a conveyor 41 , a pressing plate 42 , a floating plate 43 and a sliding plate 44 .

[0044] like Figure 6 As shown, the conveyor 41 includes two belt rollers 411 , a conveyor belt 412 and a driving motor 413 .

[0045] like Figure 6 As shown, the two belt rollers 411 are arranged in parallel along the up and down directions of the cleaning pool 2, and one belt roller 411 is located below the water surface in the cleaning pool 2, and the other belt roller 411 is located above the water surface in the cleaning pool 2. Both belt rollers 411 are rotatably connected to the front and rear sides of the cleaning pool 2.

[0046] like Figure 6 As shown, the conveyor belt 412 is sleeved on two belt rollers 411, and the conveying direction of the conveyor belt 412 is up and down. The driving motor 413 is installed on the outside of the cleaning tank 2, and the outside of the cleaning tank 2 is rotatably connected with a pulley 416, on which a gear 1 414 is fixedly installed, and a gear 2 415 meshing with the gear 1 414 is fixedly installed on the output shaft of the driving motor 413, and the pulley 416 and the belt roller 411 are connected by a belt transmission. The driving motor 413 drives the gear 1 414 to rotate, and the gear 1 414 drives the gear 2 415 to rotate, and then drives the pulley 416 to rotate, and the pulley 416 drives the belt roller 411 to rotate, and then drives the conveyor belt 412 to rotate.

[0047] like Figure 3 As shown, a plurality of pressing plates 42 are provided, evenly distributed on the conveyor belt 412, and the pressing plates 42 are tilted on the conveyor belt 412, and the pressing plates 42 are tilted upward from one end close to the feed inlet 21 to the end away from the feed inlet 21. The pressing plates 42 on the conveyor belt 412 move from top to bottom on the belt surface close to the feed inlet 21, and the angle between the pressing plates 42 on this side and the conveying direction of the conveyor belt 412 is an acute angle.

[0048] like Figure 3 and Figure 6 As shown, the driving motor 413 drives the conveyor belt 412 to move up and down, and the conveyor belt 412 drives the pressing plate 42 to move up and down. The pressing plate 42 located on the water surface and close to the feed port 21 presses the plastic fragments into the water. Since the plastic fragments can float on the water surface, the plastic fragments in the water move under the pressing plate 42. The plastic fragments follow the pressing plate 42 to move from one side of the conveyor belt 412 to the other side, thereby extending the immersion time of the plastic fragments in the water and improving the cleaning effect.

[0049] like Figure 3As shown, the floating plate 43 is tiltedly arranged on the side of the conveyor belt 412 away from the feed port 21, and the end of the floating plate 43 away from the feed port 21 is higher than the end close to the feed port 21. Two limit plates 432 are fixedly installed on the cleaning pool 2, and the plate surfaces of the two limit plates 432 are both facing downward and arranged parallel to each other. A return spring 433 is connected between the upper end surface of the floating plate 43 and the limit plate 432. An extension plate 431 that can abut against the pressure plate 42 is provided on the end of the floating plate 43 close to the conveyor belt 412, and a return torsion spring is connected between the extension plate 431 and the floating plate 43. Multiple water holes 421 are provided on the pressure plate 42, the extension plate 431 and the floating plate 43.

[0050] like Figure 3 As shown, the pressing plate 42 and the floating plate 43 are both inclined, and are both inclined upward from the end close to the feed port 21 to the end away from the feed port 21, which is beneficial for the pressing plate 42 and the floating plate 43 to drive the plastic fragments to move toward the end close to the discharge assembly 5, thereby facilitating the output of the cleaned plastic fragments; at the same time, the plastic fragments at the position of the feed port 21 in the cleaning pool 2 are reduced, which facilitates the continued transportation of the plastic fragments to be cleaned to the feed port 21.

[0051] like Figure 4 and Figure 6 As shown, the slide plate 44 is slidably arranged below the floating plate 43 and is parallel to the floating plate 43. The cleaning tank 2 has a bottom plate 22, and the bottom plate 22 is inclined upward from the side close to the feed inlet 21 to the side away from the feed inlet 21, that is, it is inclined upward from left to right. A slide rail 441 is fixedly installed on the bottom plate 22, and a slide groove 442 is opened on the slide plate 44, and the slide rail 441 is slidably installed in the slide groove 442.

[0052] like Figure 3 As shown, a pull rope 443 is connected between the floating plate 43 and the slide plate 44, and the driving motor 413 drives the slide plate 44 to move back and forth in the left and right directions through the transmission component 45, so that the floating plate 43 moves up and down. In this embodiment, two slide rails 441 are arranged in parallel front and back, and two slide plates 44 are also arranged in parallel front and back.

[0053] like Figure 3 As shown, a baffle 444 is fixedly installed in the cleaning pool 2 above the slide plate 44 and near the pull rope 443. The axis of the baffle 444 extends in the front-to-back direction. The baffle 444 is located between the conveyor belt 412 and the pull rope 443 to increase the downward movement of the float 43.

[0054] like Figure 3 and Figure 6As shown, the plastic fragments move from the side of the conveyor belt 412 close to the feed inlet 21 to the side away from the feed inlet 21. When the pressing plate 42 moves to abut against the extension plate 431, the plastic fragments move along the bottom of the extension plate 431 to the bottom of the floating plate 43. The driving motor 413 drives the slide plate 44 to move back and forth. The back and forth movement of the slide plate 44 drives the pull rope 443 to move, so as to achieve the lifting and lowering of the floating plate 43. Specifically, when the slide plate 44 moves to the extreme positions at both ends, the pull rope 443 drives the floating plate 43 to move downward, and the return spring 433 is stretched. When the slide plate 44 moves to the middle part, the floating plate 43 moves upward under the elastic force of the return spring 433 to restore the initial position. During the lifting and lowering process of the floating plate 43, the plastic fragments are slapped, and the fluctuation of the water flow washes the plastic fragments. In addition, the mutual friction between the plastic fragments improves the cleaning effect of the fragments. The pressing plate 42, the extension plate 431 and the floating plate 43 are all provided with a plurality of water holes 421, which can allow water to flow through, which is conducive to the plastic fragments being concentrated under the pressing plate 42, the extension plate 431 and the floating plate 43 during the up and down movement of the pressing plate 42, the extension plate 431 and the floating plate 43. When the slide plate 44 moves toward the side close to the conveyor belt 412, the pull rope 443 is blocked by the stop rod 444, and changes from an inclined line segment to two bent segments, thereby driving the floating plate 43 to increase the downward movement stroke, which is conducive to prolonging the time for the plastic fragments to be immersed in water and improving the cleaning effect.

[0055] like Figure 4 and Figure 5 As shown, the transmission component 45 includes a rotating shaft 451, a push plate 452, a baffle 453 and a return spring 454.

[0056] like Figure 3 and Figure 4 As shown, the rotating shaft 451 is rotatably connected to the front and rear sides of the cleaning tank 2, the axis of the rotating shaft 451 extends along the front and rear direction, the rotating shaft 451 is parallel to the belt roller 411, and the rotating shaft 451 is fixedly connected to the output shaft of the driving motor 413.

[0057] like Figure 3 and Figure 4 As shown, the push plates 452 are evenly distributed in the circumference of the rotating shaft 451, and the baffle plate 453 is fixedly installed on the end of the slide plate 44 close to the conveyor belt 412 and can contact the push plate 452. In this embodiment, the ends of the two slide plates 44 are both provided with baffle plates 453, so the push plates 452 are also provided in two groups, and three push plates 452 evenly distributed in the circumference of the rotating shaft 451 form one group. The two groups of push plates 452 are arranged in the front-to-back direction, and one group of push plates 452 drives the baffle plate 453 of one slide plate 44 to move.

[0058] like Figure 3 and Figure 5 As shown, the second return spring 454 is installed on the slide plate 44 between the end away from the conveyor belt 412 and the side wall of the cleaning tank 2.

[0059] like Figure 3-Figure 5 As shown, the driving motor 413 drives the belt roller 411 to rotate while driving the rotating shaft 451 to rotate, and the rotating shaft 451 drives the push plate 452 to rotate. When the push plate 452 rotates to contact the baffle 453, the push plate 452 drives the baffle 453 to move left, and then drives the slide plate 44 to move left. At this time, the reset spring 2 454 is stretched, and when the push plate 452 rotates to disengage from the baffle 453, the slide plate 44 moves to the right under the elastic force of the reset spring 2 454 until the next push plate 452 rotates to contact the baffle 453, driving the baffle 453 to move left again, so that the slide plate 44 moves back and forth to both ends, and then the pull rope 443 and the reset spring 1 433 are used to make the floating plate 43 move back and forth up and down, so as to beat the plastic fragments, which is beneficial to improve the cleaning effect.

[0060] like Figure 3 and Figure 4 As shown, both sides of the slide plate 44 are rotatably connected with a plurality of connecting rods 445, the axis of the connecting rods 445 is perpendicular to the slide plate 44, the outer side of the connecting rods 445 is fixedly connected with a paddle plate 446 capable of moving the water flow, a torsion spring (not shown in the figure) is installed between the connecting rods 445 and the slide plate 44, and a plurality of arc plates 447 capable of limiting the rotation angle of the connecting rods 445 are fixedly installed on the outer side of the connecting rods 445 on the slide plate 44, and a notch 448 is provided on the arc plate 447, and the notch 448 has an edge 1 facing the end of the slide plate 44 close to the feed port 21 and an edge 2 facing the bottom of the slide plate 44, and the end of the paddle plate 446 is located in the notch 448, and the torsion spring makes the paddle plate 446 contact the edge 1 of the notch 448. In the initial position, the paddle plate 446 contacts the edge 1.

[0061] like Figure 3-Figure 5As shown, the dirt washed from the plastic fragments in the cleaning tank 2 will fall to the bottom of the cleaning tank 2 under the action of its own gravity. Since the slide plate 44 and the floating plate 43 are parallel, the end close to the feed port 21 is lower than the end close to the discharge assembly 5. Due to the limitation of the arc plate 447, the paddle plate 446 will rotate in the notch 448. The initial position of the paddle plate 446 is that the paddle plate 446 contacts the edge 1, that is, the paddle plate 446 is downward. When the slide plate 44 moves to the left, the direction of the water flow resistance on the paddle plate 446 is opposite to the direction of movement of the slide plate 44. That is, to the right, due to the limitation of the arc plate 447, the paddle plate 446 maintains its initial position and moves the water flow during the movement of the slide plate 44, which is beneficial for the dirt at the bottom of the cleaning pool 2 to move toward the side close to the feed port 21; when the slide plate 44 moves to the right, the paddle plate 446 is subjected to the left water flow resistance, and the water flow resistance overcomes the force of the torsion spring, causing the paddle plate 446 to deflect to the left, and the angle between the paddle plate 446 and the horizontal plane becomes smaller, thereby reducing the paddle plate 446's movement of the water flow, thereby reducing the amount of dirt moving toward the side close to the discharge assembly 5. When the slide plate 44 moves to the left again, the force of the torsion spring and the resistance of the water flow to the right work together to move the paddle 446 to the initial position. In this way, the slide plate 44 moves back and forth left and right, which is conducive to the accumulation of dirt at the bottom of the cleaning tank 2 close to the feed inlet 21, making it easier to clean the dirt in the cleaning tank 2. At the same time, less dirt accumulates at the part of the discharge component 5 in the clean water tank, which is conducive to reducing the dirt adhering to the plastic fragments during discharge.

[0062] like Figure 2 As shown, a discharging assembly 5 is provided at one end of the cleaning pool 2 away from the feed port 21. The discharging assembly 5 includes a discharging conveyor 51 and a discharging hopper 52. The discharging conveyor 51 includes two discharging belt rollers 511, a discharging conveyor belt 512 sleeved on the two discharging belt rollers 511, and a discharging drive motor 513 driving the discharging belt rollers 511 to rotate; one discharging belt roller 511 is located in the cleaning pool 2, and the other belt roller 411 is located above the cleaning pool 2. The discharging hopper 52 is fixedly installed on the discharging conveyor belt 512, and a plurality of water spraying holes are opened at the bottom of the discharging hopper 52. After cleaning, the plastic fragments transported to the discharging assembly 5 are salvaged by the discharging hopper 52 and transported to the next process through the discharging conveyor 51.

[0063] A method for recycling waste plastics for chemical reuse raw materials, the waste plastics recycling device for chemical reuse raw materials comprising the following steps:

[0064] Step 1: convey the waste plastic to the pulverizer 1 to be crushed into flakes, convey it to the cleaning pool 2 via the material conveyor 3, start the drive motor 413, the conveyor belt 412 drives the pressing plate 42 to move, the pressing plate 42 presses the plastic fragments into the water, and the pressing plate 42 drives the plastic fragments to be immersed in the water;

[0065] Step 2: When the pressing plate 42 moves to abut against the extension plate 431, the plastic fragments move along the bottom of the extension plate 431 to the bottom of the floating plate 43, and the driving motor 413 drives the rotating shaft 451 to rotate, and the rotating shaft 451 drives the pushing plate 452 to rotate. When the pushing plate 452 rotates to contact the baffle plate 453, the pushing plate 452 drives the baffle plate 453 to move left, and then drives the sliding plate 44 to move left. At this time, the return spring 454 is stretched. When the pushing plate 452 rotates to disengage from the baffle plate 453, the sliding plate 44 moves right under the elastic force of the return spring 454 until the next The push plate 452 rotates to contact the baffle plate 453, driving the baffle plate 453 to move left again, so that the slide plate 44 moves back and forth to both ends. When the slide plate 44 moves to the extreme positions at both ends, the pull rope 443 drives the floating plate 43 to move down, and the return spring 433 is stretched. When the slide plate 44 moves to the middle part, the floating plate 43 moves up under the elastic force of the return spring 433 to restore the initial position. The floating plate 43 beats the plastic fragments during the lifting process, and the fluctuation of the water flow washes the plastic fragments. In addition, the mutual friction between the plastic fragments improves the cleaning effect of the fragments.

[0066] Step 3: When the slide plate 44 moves to the left, the direction of the water flow resistance encountered by the paddle plate 446 is opposite to the direction of movement of the slide plate 44, that is, to the right. Due to the limitation of the arc plate 447, the paddle plate 446 maintains its initial position and moves the water flow during the movement of the slide plate 44, which is beneficial for the dirt at the bottom of the cleaning pool 2 to move toward the side close to the feed inlet 21; when the slide plate 44 moves to the right, the paddle plate 446 is subjected to the water flow resistance to the left, and the water flow resistance overcomes the force of the torsion spring, causing the paddle plate 446 to deflect to the left, and the angle between the paddle plate 446 and the horizontal plane becomes smaller, thereby reducing the paddle plate 446's prying of the water flow, and reducing the amount of dirt moving toward the side close to the discharge assembly 5; when the slide plate 44 moves to the left again, the force of the torsion spring and the resistance of the water flow to the right work together to move the paddle plate 446 to the initial position, so that the slide plate 44 moves back and forth left and right, which is beneficial for the dirt to gather at the bottom of the cleaning pool 2 close to the feed inlet 21;

[0067] Step 4: After the plastic fragments are cleaned, the plastic fragments that move to the discharging component 5 are salvaged by the discharging hopper 52 and conveyed to the next process via the discharging conveyor 51.

[0068] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0069] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A waste plastic recycling device for chemical reuse raw materials, comprising a pulverizer and a cleaning tank, wherein one end of the cleaning tank is provided with a feed inlet and the other end is provided with a discharge assembly, characterized in that: A material pressing mechanism capable of pressing plastic fragments into water is provided at a position near the feed inlet of the cleaning tank, and the material pressing mechanism comprises a conveyor, a pressing plate, a floating plate and a sliding plate; the conveyor comprises two belt rollers arranged in parallel along the up and down directions of the cleaning tank, a conveyor belt sleeved on the two belt rollers, and a driving motor for driving the belt rollers to rotate; a plurality of pressing plates are installed on the conveyor belt at intervals; The floating plate is arranged on the side of the conveyor belt away from the feed port, and a limit plate is fixedly installed on the cleaning pool. A return spring is connected between the upper end surface of the floating plate and the limit plate. An extension plate capable of abutting against the pressure plate is arranged on the end of the floating plate close to the conveyor belt, and the extension plate and the floating plate are elastically connected. A plurality of water holes are arranged on the pressure plate, the extension plate and the floating plate. The slide plate is slidably arranged below the floating plate and parallel to the floating plate, a pull rope is connected between the floating plate and the slide plate, and the driving motor drives the slide plate to move back and forth to both ends through the transmission component, so that the floating plate moves up and down; The transmission component includes a rotating shaft rotatably connected to both sides of the cleaning tank, a plurality of push plates evenly distributed around the rotating shaft, a baffle fixedly connected to the slide plate close to one end of the conveyor belt and capable of contacting the push plate, and two return springs arranged between the end of the slide plate away from the conveyor belt and the side wall of the cleaning tank. The rotating shaft is fixedly connected to the output shaft of the driving motor.

2. The waste plastic recycling device for chemical recycling raw materials according to claim 1, characterized in that: One belt roller is located below the water surface in the cleaning pool, and the other belt roller is located above the water surface in the cleaning pool. The two belt rollers are rotatably connected to both sides of the cleaning pool. The driving motor is arranged on the outside of the cleaning pool. The outside of the cleaning pool is rotatably connected to a pulley, on which a gear 1 is fixedly mounted, and on the output shaft of the driving motor a gear 2 meshing with the gear 1 is fixedly mounted, and the pulley and the belt roller are connected by a belt transmission.

3. The waste plastic recycling device for chemical recycling raw materials according to claim 1, characterized in that: The pressing plate is tilted on the conveyor belt, and tilts upward from one end close to the feed inlet to one end away from the feed inlet; one end of the floating plate away from the feed inlet is higher than the end close to the feed inlet.

4. The waste plastic recycling device for chemical recycling raw materials according to claim 1, characterized in that: A baffle is fixedly installed above the slide plate and near the pull rope in the cleaning pool. The baffle is located between the conveyor belt and the pull rope to increase the downward movement stroke of the floating plate.

5. The waste plastic recycling device for chemical recycling raw materials according to claim 3, characterized in that: Both sides of the slide plate are rotatably connected with multiple connecting rods, the outer sides of the connecting rods are fixedly connected with a paddle plate capable of shifting the water flow, a torsion spring is installed between the connecting rods and the slide plate, and multiple arc-shaped plates capable of limiting the rotation angle of the connecting rods are fixedly installed on the slide plate at the outer sides of the connecting rods, a notch is provided on the arc-shaped plates, and the notch has an edge one facing one end of the slide plate close to the feed port and an edge two facing the bottom of the slide plate, the end of the paddle plate is located in the notch, and the torsion spring makes the paddle plate contact edge one of the notch.

6. The waste plastic recycling device for chemical recycling raw materials according to claim 5, characterized in that: The cleaning pool has a bottom plate, which is inclined upward from a side close to the feed inlet to a side away from the feed inlet. A slide rail is fixedly installed on the bottom plate, a slide plate is provided with a slide groove, and the slide rail is slidably installed in the slide groove.

7. A method for recycling waste plastics for chemical reuse raw materials, using the waste plastics recycling device for chemical reuse raw materials according to claim 1, characterized in that: The following steps are involved: Step 1: transport the waste plastic to the crusher and crush it into flakes, then transport it to the cleaning pool, start the drive motor, the conveyor belt drives the pressing plate to move, the pressing plate presses the plastic fragments into the water, and the pressing plate drives the plastic fragments to soak in the water; Step 2: When the pressing plate moves to abut against the extension plate, the plastic fragments move along the bottom of the extension plate to the bottom of the floating plate, and the driving motor drives the sliding plate to move back and forth, and then drives the floating plate to rise and fall through the pull rope and the return spring, and the plastic fragments are slapped during the lifting process of the floating plate; Step 3: After the plastic fragments are cleaned, the discharging component removes the plastic fragments from the cleaning tank.

Images