Plastic bottle recycling and processing device

Abstract

The present invention discloses a plastic bottle recycling and processing device, which relates to the technical field of plastic bottle recycling. The device comprises a feeding unit, a label removal unit, a conveying unit, a cutting and screening unit and a post-processing unit. The feeding unit is used to feed waste plastic bottles to the label removal unit, the label removal unit is used to remove labels on the waste plastic bottles, the conveying unit feeds the waste plastic bottles with label removal to the cutting and screening unit, the cutting and screening unit is used to cut the waste plastic bottles with label removal into pieces and screen out required fragments, and the post-processing unit is used to clean and collect the fragments. The recycling and processing device can simultaneously process plastic bottles of different sizes, different bottle body shrinkage, and different bottle cap retention conditions, and has a wide range of applications.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic bottle recycling, in particular to a plastic bottle recycling and processing device. Background Art

[0002] PET plastic bottles have been widely used in the field of plastic packaging. According to life needs, PET plastic bottles are mostly disposable packaging products, so the recycling of PET plastic bottles is becoming more and more important.

[0003] Chinese patent CN112743708B discloses a PET bottle recycling and processing device that separates and recycles bottle caps, labels, and bottle bodies, improving the purity and utilization rate of recycled materials. However, at least the following problems remain: 1. The device uses a blade and a knife barrel to cut labels to remove labels. Different-sized knife barrels are required for bottles of different sizes, and therefore cannot simultaneously recycle plastic bottles of different sizes. 2. Rotary cutting can only be performed on plastic bottles with intact, undeformed bodies. However, most discarded plastic bottles have incomplete or flat bodies, and at least a portion of the label is adhered to the bottle body, otherwise the label cannot be fixed to the bottle body. Therefore, due to the adhesion, purely mechanical cutting is difficult to completely cut the label at the adhered position. 3. Discarded plastic bottles may contain accumulated liquid or be covered with dust. After removing the caps and labels, they are directly flattened and collected, and the collected bottles still need further processing. 4. Discarded plastic bottles do not always retain their caps. For plastic bottles without caps, the cap removal step is not required, and current devices cannot automatically distinguish whether they have caps. Summary of the Invention

[0004] In view of the above-mentioned defects in the prior art, the purpose of the present invention is to provide a plastic bottle recycling and processing device to solve the problem that multiple types of plastic bottles cannot be recycled at the same time.

[0005] The purpose of the present invention is achieved by adopting the following technical solutions:

[0006] A plastic bottle recycling and processing device includes a feeding unit, a label removal unit, a conveying unit, a cutting and screening unit and a post-processing unit, wherein the feeding unit is used to feed waste plastic bottles to the label removal unit, the label removal unit is used to remove labels on waste plastic bottles, the conveying unit feeds the waste plastic bottles with labels removed to the cutting and screening unit, the cutting and screening unit includes a material guide port, a cutting roller group, a screening tank and a screw conveyor, the material guide port is fixed above the cutting roller group and is used to guide waste plastic bottles into the cutting roller group, the cutting roller group is used to cut plastic bottles into pieces, the screening tank is arranged below the cutting roller group, and the The screening pool is filled with water medium, and a baffle and the screw conveyor are fixedly provided in the screening pool. The baffle is provided below one side of the cutting roller group, the top of the baffle protrudes above the water surface of the water medium and the bottom does not contact the bottom wall of the screening pool, the bottom wall of the screening pool below the cutting roller group is inclined, and the screw conveyor is vertically provided on the outside of the baffle, a feed port is provided at the bottom of the screw conveyor and a discharge port is provided at the top, the post-processing unit includes a processing box, the discharge port is introduced into the top of the processing box, a stirring assembly is provided in the processing box, a water outlet is provided on the lower box wall of the processing box, and an opening and closing door is provided at the bottom of the processing box.

[0007] Furthermore, the cutting and screening unit also includes a water wheel, which includes a rotating shaft and a plurality of wheel plates equidistantly arranged along the circumference of the rotating shaft. Both ends of the rotating shaft are installed on the screening pool. A first driving source for driving the rotating shaft is fixed on the screening pool. When the rotating shaft rotates, the wheel plates below it can stir the water surface of the water medium.

[0008] Furthermore, a partition is provided on the outside of the water wheel, the top of the partition is higher than the water surface of the water medium, the bottom wall of the screening tank is provided with a discharge port on the outside of the partition, and a guide plate is fixed at the discharge port.

[0009] Furthermore, the bottom wall of the screening tank includes an inclined portion and a flat portion, the flat portion is provided at the position where the screw conveyor is located, and the inclined portion is inclined downward along the direction from the baffle to the screw conveyor.

[0010] Furthermore, the stirring assembly includes a second driving source, a stirring shaft and several stirring arms. The second driving source is fixed to the top of the processing box and is used to drive the stirring shaft. The stirring shaft is vertically arranged in the processing box. The stirring arm is vertically arranged on the stirring shaft. A brush is wrapped and fixed on the stirring arm. A water inlet is opened on the top of the processing box.

[0011] The top of the feeding passage is provided with a bottle inlet for horizontally entering the plastic bottle, and one side wall of the feeding passage is provided with a guide groove for passing the bottle inlet of the plastic bottle. The feeding passage comprises an arc section and a stable section, the arc section extends in an arc downward from the bottle inlet, the stable section is connected to the end of the arc section, and the end of the stable section is provided with a bottle outlet. The two limit plates are arranged in parallel on the outer sides of the bottle outlet, the limit plate is arranged perpendicular to the stable section, and the two guide plates are arranged in parallel between the two limit plates, the height of the guide plate is smaller than the height of the limit plate, and a limit rod is fixed on the bottom of the guide plate, and the plastic bottle on the top of the guide plate can slide to the position of the limit rod under gravity, and the limit plate is fixed on the feeding rack, and the guide plate is rotatably arranged between the two limit plates.

[0012] Furthermore, the feeding unit also includes a conveying channel, a conveying plate, a guide rod and a guide plate. The conveying channel is arranged in the middle of the feeding rack, and mounting racks are respectively provided on both sides of the front section of the conveying channel. A conveyor belt is provided in the mounting rack, and the conveyor belt faces the conveying channel. The conveying plate is provided at the rear end of the mounting rack. The two conveying plates are respectively arranged on both sides of the conveying channel, and the guide rod and the guide plate are respectively arranged at the ends of the two conveying plates. The guide rod and the guide plate are used to guide the plastic bottles in the standing state to the lying state, and the end of the conveying channel is arranged at the position of the bottle inlet.

[0013] Furthermore, the feeding unit also includes a mounting seat, a rotating shaft and a third driving source. The mounting seat is fixed on the feeding rack, the third driving source is fixed on the mounting seat and is used to drive the rotating shaft, the two guide plates are fixed on the rotating shaft, and the outer end of the rotating shaft is rotatably provided on the limit plate.

[0014] Furthermore, the feeding rack is provided with a conveying trough, and the guide plate and the limit rod can be rotated into the conveying trough; the conveying unit includes a linear conveying module and a clamping rotating member, the linear conveying module is arranged directly below the conveying trough, the clamping rotating member is movable on the linear conveying module and the clamping part of the clamping rotating member is arranged in the conveying trough.

[0015] Furthermore, the label removal unit includes an air compressor, a heating tube and a cylinder push rod fixed on the feeding rack. The heating tube is vertically arranged on one side of the conveying trough and on the rear side of the feeding unit. The heating tube is provided with an air vent on the side facing the conveying trough. The air vent is arranged along the length direction of the heating tube. A heating wire is provided in the heating tube. The air compressor introduces compressed air into the heating tube through a pipeline. The cylinder push rod is arranged on one side of the conveying trough and on the rear side of the heating tube.

[0016] The beneficial effects of the present invention are:

[0017] The present invention determines the feeding direction of plastic bottles by setting a feeding unit, removes labels on plastic bottles to avoid residue by setting a label removal unit, cuts and screens the plastic bottles by setting a cutting and screening unit, and cleans and collects PET fragments by setting a post-processing unit. The present invention can simultaneously process plastic bottles of different sizes, different bottle body shrinkage, and different bottle cap retention conditions, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a side view of the feeding unit of the present invention;

[0019] Figure 2 It is a structural diagram of the front section of the feeding unit in the present invention;

[0020] Figure 3 It is a structural diagram of the rear section of the feeding unit in the present invention;

[0021] Figure 4 It is a schematic structural diagram of the rear section of the feeding unit and the label removal unit in the present invention;

[0022] Figure 5 It is a structural schematic diagram of the heating tube in the present invention;

[0023] Figure 6 It is a schematic structural diagram of the cutting and screening unit and the post-processing unit in the present invention;

[0024] Figure 7 Schematic diagram of the internal structure of the cutting and screening unit and the post-processing unit in the present invention;

[0025] Figure 8 It is a structural schematic diagram of the stirring assembly in the present invention.

[0026] In the figure: 1. Feeding unit; 11. Feeding rack; 12. Feeding channel; 121. Arc section; 122. Steady section; 13. Limiting plate; 14. Guide plate; 15. Bottle inlet; 16. Guide groove; 17. Bottle outlet; 18. Limiting rod; 19. Conveying channel; 110. Conveying plate; 111. Guide rod; 112. Guide plate; 113. Mounting frame; 114. Conveyor belt; 115. Mounting base; 116. Rotating shaft; 117. Third driving source; 118. Conveying groove; 2. Label removal unit; 21. Air compressor; 22. Heating tube; 23. Cylinder push rod; 24. Air release port; 3. Conveying unit; 31. Clamping rotating part; 4. Cutting and screening unit; 41. Material guide port; 42. Cutting roller group; 43. Screening tank; 44. Inclined part; 45. Leveling part; 46. Screw conveyor; 47. Baffle; 48. Feed port; 49. Water wheel; 491. Rotating shaft; 492. Wheel plate; 410. Partition; 411. Feed port; 412. Material guide plate; 413. Discharge port; 5. Post-processing unit; 51. Processing box; 52. Stirring assembly; 521. Second driving source; 522. Stirring shaft; 523. Stirring arm; 53. Water outlet; 54. Opening and closing door; 55. Water inlet. DETAILED DESCRIPTION

[0027] In order to make the technical problems, technical solutions and beneficial effects solved by the invention more clearly understood, the invention is further described below with reference to the accompanying drawings and embodiments.

[0028] like Figures 1 to 8 As shown, the present invention provides a plastic bottle recycling and processing device, including a feeding unit 1, a label removal unit 2, a conveying unit 3, a cutting and screening unit 4 and a post-processing unit 5. The feeding unit 1 is used to feed the waste plastic bottles to the label removal unit 2, the label removal unit 2 is used to remove the labels on the waste plastic bottles, the conveying unit 3 feeds the waste plastic bottles with label removal to the cutting and screening unit 4, the cutting and screening unit 4 is used to cut the waste plastic bottles with label removal into pieces and screen out PET fragments.

[0029] The cutting and screening unit 4 includes a material guide port 41, a cutting roller group 42, a screening tank 43 and a screw conveyor 46. The material guide port 41 is fixed above the cutting roller group 42 and is used to guide the discarded plastic bottles into the cutting roller group 42. The cutting roller group 42 is used to cut the plastic bottles into pieces. The screening tank 43 is arranged below the cutting roller group 42. The screening tank 43 is filled with a water medium. A baffle 47 and a screw conveyor 46 are fixed in the screening tank 43. The baffle 47 is arranged below one side of the cutting roller group 42. The top of the baffle 47 protrudes from the water surface of the water medium and the bottom does not contact the bottom wall of the screening tank 43. The bottom wall of the screening tank 43 below the cutting roller group 42 is inclined. The screw conveyor 46 is vertically arranged on the outside of the baffle 47. The bottom of the screw conveyor 46 is provided with a feed port 48 and the top is provided with a discharge port 413.

[0030] After removing the labels, the discarded plastic bottles are left with the bottle body, bottle cap, residual liquid in the bottle, and mud and dust on the bottle body. After being processed by the cutting roller group 42, the bottle body and bottle cap are cut into fragments, and other impurities fall into the screening tank 43. For plastic bottles, the bottle body is made of PET material and the bottle cap is made of common PE material. The two plastics have different polymer structures, so there is a big difference in density. The PET fragments with higher density can sink in the water medium and sink to the bottom wall of the screening tank 43, while the PE fragments with lower density float on the surface of the water medium and will not sink. At the same time, whether it is PE or PET material, it can maintain stability in water at room temperature. At the same time, the density of water is between PE and PET. Therefore, water can be used as a medium to screen PE and PET.

[0031] For some plastic bottles without bottle caps, the cutting roller group 42 can also be used to directly shred them, which does not affect the screening and does not need to additionally distinguish whether the discarded plastic bottles have bottle caps.

[0032] Baffle 47 is positioned at the water surface to prevent large-scale floating of PE fragments on the water surface and reduce their floating range, which not only does not affect the collection of PET fragments but also facilitates centralized collection of PE fragments. The bottom wall of screening tank 43 is tilted, allowing PET fragments that settle at the bottom of screening tank 43 to flow along the bottom wall to the vicinity of screw conveyor 46. They are then conveyed from feed port 48 at the bottom of screw conveyor 46 to discharge port 413 at the top, completing the collection of PET fragments.

[0033] The post-processing unit 5 includes a processing box 51, the discharge port 413 is introduced into the top of the processing box 51, a stirring assembly 52 is provided in the processing box 51, a water outlet 53 is opened on the lower box wall of the processing box 51, and an opening and closing door 54 is provided at the bottom of the processing box 51.

[0034] The PET fragments collected by the screw conveyor 46 are mixed with water or other impurities when entering the processing box 51. The PET fragments, water and impurities are effectively dispersed by the stirring component 52, and the water and impurities are screened out through the water outlet 53, and the PET fragments are retained in the processing box 51. The opening and closing door 54 is opened to complete the collection of the PET fragments. Of course, the post-processing unit 5 may also include a drying device to dry the collected PET fragments for recycling. The drying device can adopt existing technology and will not be described in detail here.

[0035] refer to Figure 7The cutting and screening unit 4 also includes a water wheel 49, which includes a rotating shaft 491 and a plurality of wheel plates 492 equidistantly arranged along the circumference of the rotating shaft 491. Both ends of the rotating shaft 491 are mounted on the screening pool 43. A first driving source for driving the rotating shaft 491 is fixed on the screening pool 43. When the rotating shaft 491 rotates, the wheel plates 492 below it can stir the surface of the water medium, and can guide the PE fragments floating on the water surface to the same side of the screening pool 43, thereby facilitating the collection of the PE fragments. The rotation speed of the rotating shaft 491 is adjusted to adjust the guiding speed of the PE fragments.

[0036] Furthermore, a partition 410 is provided on the outside of the water wheel 49 , the top of the partition 410 is higher than the water surface of the water medium, and a discharge port 411 is opened on the bottom wall of the screening tank 43 on the outside of the partition 410 , and a guide plate 412 is fixed at the position of the discharge port 411 .

[0037] Partition 410 prevents PET fragments from falling out of discharge port 411 and blocks the aqueous medium, preventing it from flowing directly into discharge port 411. When waterwheel 49 is not rotating, PE fragments floating on the water surface will not fall directly into discharge port 411. Only when waterwheel 49 rotates will the wheel plate 492 below drive the PE fragments on the water surface, lifting them and dropping them into discharge port 411. It should be noted that a post-processing unit 5 may also be provided at discharge port 411 to remove impurities and water from the PE fragments.

[0038] Furthermore, the bottom wall of the screening tank 43 includes an inclined portion 44 and a flat portion 45. The flat portion 45 is located where the screw conveyor 46 is located. The inclined portion 44 slopes downward along the direction from the baffle 47 to the screw conveyor 46. The inclined portion 44 facilitates the flow of PET fragments toward the flat portion 45, and the flat portion 45 facilitates the fixed installation of the screw conveyor 46.

[0039] refer to Figure 8 The stirring assembly 52 includes a second driving source 521, a stirring shaft 522 and a plurality of stirring arms 523. The second driving source 521 is fixed to the top of the processing box 51 and is used to drive the stirring shaft 522. The stirring shaft 522 is vertically arranged in the processing box 51. The stirring arms 523 are vertically arranged on the stirring shaft 522. A brush is wrapped and fixed on the stirring arms 523. A water inlet 55 is opened on the top of the processing box 51.

[0040] The second driving source 521 drives the stirring shaft 522 to rotate and stir. The stirring arms 523 are symmetrically arranged on the stirring shaft 522 to ensure the rotation balance of the stirring shaft 522. A brush is fixed on the stirring arm 523. During the stirring process, water is continuously introduced into the processing box 51 through the water inlet 55. During the stirring process, the brush continuously brushes the PET fragments, thereby cleaning the PET fragments. At the same time, the water in the processing box 51 can continuously flow out from the water outlet 53 to achieve clean water removal.

[0041] refer to Figure 3 The feeding unit 1 includes a feeding frame 11, a feeding channel 12, two limit plates 13 and two guide plates 14. The feeding channel 12 is fixed on the feeding frame 11. The top of the feeding channel 12 is provided with a bottle inlet 15 for plastic bottles to enter horizontally. A side wall of the feeding channel 12 is provided with a guide groove 16 for the bottle mouth of the plastic bottle to pass through. The feeding channel 12 includes an arc section 121 and a stable section 122. The arc section 121 extends downward in an arc shape from the bottle inlet 15. The stable section 122 is connected to the end of the arc section 121. The stable section 1 A bottle outlet 17 is provided at the end of 22, two limit plates 13 are arranged in parallel on the outside of the bottle outlet 17, the limit plates 13 are arranged perpendicular to the stable section 122, and two guide plates 14 are arranged in parallel between the two limit plates 13. The height of the guide plate 14 is less than the height of the limit plate 13. A limit rod 18 is fixed to the bottom of the guide plate 14. The plastic bottle on the top of the guide plate 14 can slide to the position of the limit rod 18 under gravity. The limit plate 13 is fixed on the feeding rack 11, and the guide plate 14 is rotatably arranged between the two limit plates 13.

[0042] There are certain requirements for the direction in which plastic bottles enter the feeding channel 12 from the bottle inlet 15. The bottle mouths of the plastic bottles should face the same direction, that is, toward the side of the guide groove 16. The height and diameter of the plastic bottles are not limited. As long as the height of the plastic bottles is greater than the height of the feeding channel 12 and the plastic bottles do not turn in the feeding channel 12, it is sufficient. The presence of the flat section 122 prevents plastic bottles from falling directly onto the guide plate 14 after exiting the curved section 121, thus preventing conveying errors.

[0043] The plastic bottle coming down from the arc section 121 pushes the plastic bottle in the stable section 122, and pushes the plastic bottle in the stable section 122 between the two limit plates 13. Since the height of the guide plate 14 is less than the height of the limit plate 13, the plastic bottle is mounted between the two guide plates 14. A connecting plate is fixed on the same side of the two limit plates 13, and the connecting plate can prevent the plastic bottle from escaping from the limit plate 13. The plastic bottle slides along the two guide plates 14 to the position of the limit rod 18. At this time, the bottle mouth faces downward and is mounted between the two limit rods 18. During the sliding process, the plastic bottle is restricted by the limit plates 13 on both sides and will not run out of the limit plates 13. The position of the limit plate 13 is fixed. Rotate the guide plate 14 to drive the plastic bottle to rotate together until the direction of the plastic bottle is vertical and waits for transportation by the conveying unit 3.

[0044] refer to Figure 2The feeding unit 1 also includes a conveying channel 19, a conveying plate 110, a guide rod 111 and a guide plate 112. The conveying channel 19 is located in the middle of the feeding rack 11. Mounting racks 113 are provided on both sides of the front section of the conveying channel 19. A conveyor belt 114 is provided in the mounting rack 113. The conveyor belt 114 faces the conveying channel 19. A conveying plate 110 is provided at the rear end of the mounting rack 113. The two conveying plates 110 are respectively provided on both sides of the conveying channel 19. The guide rod 111 and the guide plate 112 are respectively provided at the ends of the two conveying plates 110. The guide rod 111 and the guide plate 112 are used to guide the plastic bottles in the standing state to the lying state. The end of the conveying channel 19 is located at the position of the bottle inlet 15.

[0045] The two conveyor belts 114 rotate, driving the plastic bottles on the middle conveying channel 19 to move forward and move between the two conveying plates 110. The plastic bottles at the rear push the plastic bottles in the front to continue moving forward. When the plastic bottles move between the guide rod 111 and the guide plate 112, they gradually fall down under the guidance of the guide rod 111 and the guide plate 112 until they are completely laid down and finally fall into the bottle inlet 15.

[0046] Furthermore, the feeding unit 1 also includes a mounting seat 115, a rotating shaft 116 and a third driving source 117. The mounting seat 115 is fixed on the feeding rack 11, the third driving source 117 is fixed on the mounting seat 115 and is used to drive the rotating shaft 116, the two guide plates 14 are fixed on the rotating shaft 116, and the outer end of the rotating shaft 116 is rotatably provided on the limit plate 13.

[0047] Furthermore, the feeding rack 11 is provided with a conveying groove 118, and the guide plate 14 and the limit rod 18 can be rotated into the conveying groove 118; the conveying unit 3 includes a linear conveying module and a clamping rotating member 31, the linear conveying module is arranged directly below the conveying groove 118, the clamping rotating member 31 is movable on the linear conveying module and the clamping part of the clamping rotating member 31 is arranged in the conveying groove 118.

[0048] The clamping rotating member 31 can adopt the existing technology and will not be described in detail here. The guide plate 14 drives the plastic bottle to rotate together. When the plastic bottle is vertical, the bottle mouth faces downward, and the bottle mouth is supported between the two limit rods 18. The clamping rotating member 31 moves to the bottle mouth position, clamps the bottle mouth, and drives the plastic bottle to move along the linear conveying module in the conveying trough 118.

[0049] refer to Figure 4The label removal unit 2 includes an air compressor 21 fixed to the feeding rack 11, a heating pipe 22 and a cylinder push rod 23. The heating pipe 22 is vertically arranged on one side of the conveying trough 118 and on the rear side of the feeding unit 1. The heating pipe 22 is provided with an air vent 24 on the side facing the conveying trough 118. The air vent 24 is arranged along the length direction of the heating pipe 22. A heating wire is provided in the heating pipe 22. The air compressor 21 introduces compressed air into the heating pipe 22 through a pipeline. The cylinder push rod 23 is arranged on one side of the conveying trough 118 and on the rear side of the heating pipe 22.

[0050] The clamping rotating member 31 moves the plastic bottle to the position of the heating tube 22, and the high-pressure hot air in the heating tube 22 is ejected from the vent 24 and sprayed towards the plastic bottle. At this time, the temperature of the gas is about 130°C, which can cut off the label on the plastic bottle. At the same time, the clamping rotating member 31 rotates with the plastic bottle at the current position, and the high-pressure hot air continuously blows towards the label and the adhesive position between the label and the plastic bottle. The label on the plastic bottle can be completely blown off by the high-pressure hot air without any residue. The plastic bottle after the label is removed continues to move with the clamping rotating member 31. When it moves to the position of the cylinder push rod 23, the clamping rotating member 31 releases the clamp, and the cylinder push rod 23 extends and pushes the plastic bottle into the material guide port 41 for cutting and screening.

[0051] Working principle: discarded plastic bottles enter the conveying channel 19, and the two conveyor belts 114 rotate, driving the discarded plastic bottles on the middle conveying channel 19 to move forward. When they move between the two conveying plates 110, the plastic bottles at the rear push the plastic bottles in the front to continue moving forward. Under the guidance of the guide rod 111 and the guide plate 112, the plastic bottles gradually fall down and fall into the bottle inlet 15 under the push of the plastic bottles at the rear, and fall from the arc section 121 of the feeding channel 12 to the stable section 122. The plastic bottles at the rear push the plastic bottles in the stable section 122 to the two limit plates. 13, at this time the plastic bottle is placed between the two guide plates 14, and the plastic bottle slides along the two guide plates 14 to the position of the limit rod 18. At this time, the third driving source 117 drives the rotating shaft 116, and the guide plate 14 drives the plastic bottle to rotate. When the plastic bottle is vertical, the bottle mouth faces downward, and the clamping rotating member 31 moves to the bottle mouth position, clamps the bottle mouth, and drives the plastic bottle to move along the linear conveying module in the conveying trough 118. When it moves to the position of the heating tube 22, it stops, and the high-pressure hot air in the heating tube 22 is sprayed to the plastic bottle from the vent 24, and the label on the plastic bottle The plastic bottle is cut off, and the clamping rotating member 31 rotates at the current position with the plastic bottle, and the high-pressure hot air continuously blows towards the label and the pasting position of the label and the plastic bottle until the label on the plastic bottle is completely blown off by the high-pressure hot air. The plastic bottle with the label removed continues to move with the clamping rotating member 31. When it moves to the position of the cylinder push rod 23, the clamping rotating member 31 releases the clamping, and the cylinder push rod 23 extends and pushes the plastic bottle into the guide port 41. After being processed by the cutting roller group 42, the bottle body and the bottle cap are cut into fragments, and other impurities fall into the screening pool 43. The wheel 49 rotates, directing the PE fragments to the discharge port 411. The PET fragments sink to the bottom of the water and flow along the bottom wall of the screening tank 43 to the vicinity of the screw conveyor 46. They are transported from the feed port 48 at the bottom of the screw conveyor 46 to the discharge port 413 at the top and enter the processing box 51. The PET fragments, water and impurities are effectively dispersed by the stirring component 52. The water and impurities are screened out through the water outlet 53, and the PET fragments are retained in the collection box. The opening and closing door 54 is opened, and the PET fragments are poured into the drying device for drying. Finally, the collection of the PET fragments is completed.

[0052] The present invention determines the feeding direction of plastic bottles by setting a feeding unit 1, removes labels on plastic bottles to avoid residue by setting a label removal unit 2, cuts and screens the plastic bottles by setting a cutting and screening unit 4, and cleans and collects PET fragments by setting a post-processing unit 5. The present invention can simultaneously process plastic bottles of different sizes, different bottle body shrinkage, and different bottle cap retention conditions, and has a wide range of applications.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should fall within the scope of protection of the present invention.

Claims

1. A plastic bottle recycling and processing device, characterized in that: The invention comprises a feeding unit (1), a label removal unit (2), a conveying unit (3), a cutting and screening unit (4) and a post-processing unit (5), wherein the feeding unit (1) is used to feed waste plastic bottles to the label removal unit (2), the label removal unit (2) is used to remove labels on waste plastic bottles, the conveying unit (3) feeds the waste plastic bottles without labels to the cutting and screening unit (4), the cutting and screening unit (4) comprises a guide port (41), a cutting roller group (42), a screening tank (43) and a screw conveyor (46), the guide port (41) is fixed above the cutting roller group (42) and is used to guide waste plastic bottles into the cutting roller group (42), the cutting roller group (42) is used to cut plastic bottles into pieces, the screening tank (43) is arranged below the cutting roller group (42), the screening tank (43) is filled with water medium, the screening tank (43) 43) is fixedly provided with a baffle (47) and the screw conveyor (46), the baffle (47) is provided below one side of the cutting roller group (42), the top of the baffle (47) protrudes above the water surface of the water medium and the bottom does not contact the bottom wall of the screening tank (43), the bottom wall of the screening tank (43) below the cutting roller group (42) is inclined, the screw conveyor (46) is vertically provided on the outside of the baffle (47), the bottom of the screw conveyor (46) is provided with a feed port (48) and the top is provided with a discharge port (413), the post-processing unit (5) includes a processing box (51), the discharge port (413) is introduced into the top of the processing box (51), a stirring assembly (52) is provided in the processing box (51), a water outlet (53) is provided on the lower box wall of the processing box (51), and an opening and closing door (54) is provided at the bottom of the processing box (51); The feeding unit (1) comprises a feeding frame (11), a feeding channel (12), two limiting plates (13) and two guide plates (14); the feeding channel (12) is fixed on the feeding frame (11); a bottle inlet (15) for plastic bottles to enter horizontally is provided at the top of the feeding channel (12); a guide groove (16) for the bottle mouth of the plastic bottle to pass through is provided on a side wall of the feeding channel (12); the feeding channel (12) comprises an arc section (121) and a stable section (122); the arc section (121) extends downward in an arc shape from the bottle inlet (15); the stable section (122) is connected to the end of the arc section (121); the stable section (122) is provided at the end of the arc section (121); A bottle outlet (17) is provided at the end, two limiting plates (13) are arranged in parallel on the outside of the bottle outlet (17), the limiting plates (13) and the stable section (122) are arranged vertically, and two guide plates (14) are arranged in parallel between the two limiting plates (13), the height of the guide plates (14) is less than the height of the limiting plates (13), a limiting rod (18) is fixed at the bottom of the guide plate (14), and the plastic bottle on the top of the guide plate (14) can slide to the position of the limiting rod (18) under gravity, the limiting plate (13) is fixed on the feeding rack (11), and the guide plate (14) is rotatably arranged between the two limiting plates (13).

2. A plastic bottle recycling and processing device according to claim 1, characterized in that: The cutting and screening unit (4) further includes a water wheel (49), the water wheel (49) including a rotating shaft (491) and a plurality of wheel plates (492) equidistantly arranged along the circumference of the rotating shaft (491), both ends of the rotating shaft (491) being mounted on the screening pool (43), a first driving source for driving the rotating shaft (491) being fixed on the screening pool (43), and when the rotating shaft (491) rotates, the wheel plates (492) below the rotating shaft can stir the surface of the water medium.

3. The plastic bottle recycling device according to claim 2, characterized in that: A partition (410) is provided on the outside of the water wheel (49), and the top of the partition (410) is higher than the water surface of the water medium. A discharge port (411) is provided on the bottom wall of the screening tank (43) on the outside of the partition (410), and a guide plate (412) is fixed at the position of the discharge port (411).

4. The plastic bottle recycling device according to claim 1, characterized in that: The bottom wall of the screening tank (43) includes an inclined portion (44) and a flat portion (45), wherein the flat portion (45) is provided at the location of the screw conveyor (46), and the inclined portion (44) is inclined downward in a direction from the baffle (47) to the screw conveyor (46).

5. The plastic bottle recycling device according to claim 1, characterized in that: The stirring assembly (52) includes a second driving source (521), a stirring shaft (522) and a plurality of stirring arms (523). The second driving source (521) is fixed to the top of the processing box (51) and is used to drive the stirring shaft (522). The stirring shaft (522) is vertically arranged in the processing box (51). The stirring arms (523) are vertically arranged on the stirring shaft (522). A brush is wrapped and fixed on the stirring arms (523). A water inlet (55) is opened on the top of the processing box (51).

6. The plastic bottle recycling device according to claim 1, characterized in that: The feeding unit (1) further comprises a conveying channel (19), a conveying plate (110), a guide rod (111) and a guide plate (112), wherein the conveying channel (19) is arranged in the middle of the feeding rack (11), and mounting racks (113) are respectively provided on both sides of the front section of the conveying channel (19), a conveying belt (114) is provided in the mounting rack (113), and the conveying belt (114) faces the conveying channel (19), and the rear end of the mounting rack (113) is provided with the conveying plate (110), and the two conveying plates (110) are respectively arranged on both sides of the conveying channel (19), and the guide rod (111) and the guide plate (112) are respectively arranged at the ends of the two conveying plates (110), and the guide rod (111) and the guide plate (112) are used to guide the plastic bottles in the standing state to the lying state, and the end of the conveying channel (19) is arranged at the position of the bottle inlet (15).

7. The plastic bottle recycling device according to claim 1, characterized in that: The feeding unit (1) further comprises a mounting seat (115), a rotating shaft (116) and a third driving source (117), wherein the mounting seat (115) is fixed on the feeding frame (11), the third driving source (117) is fixed on the mounting seat (115) and is used to drive the rotating shaft (116), the two guide plates (14) are fixed on the rotating shaft (116), and the outer end of the rotating shaft (116) is rotatably arranged on the limiting plate (13).

8. The plastic bottle recycling device according to claim 1, characterized in that: The feeding rack (11) is provided with a conveying trough (118), and the guide plate (14) and the limiting rod (18) can be rotated into the conveying trough (118); the conveying unit (3) includes a linear conveying module and a clamping rotating member (31), the linear conveying module is arranged directly below the conveying trough (118), the clamping rotating member (31) is movable on the linear conveying module, and the clamping portion of the clamping rotating member (31) is arranged in the conveying trough (118).

9. The plastic bottle recycling device according to claim 8, characterized in that: The label removal unit (2) includes an air compressor (21), a heating pipe (22) and a cylinder push rod (23) fixed on the feeding rack (11); the heating pipe (22) is vertically arranged on one side of the conveying trough (118) and on the rear side of the feeding unit (1); the heating pipe (22) is provided with an air vent (24) on the side facing the conveying trough (118); the air vent (24) is arranged along the length direction of the heating pipe (22); a heating wire is provided in the heating pipe (22); the air compressor (21) introduces compressed air into the heating pipe (22) through a pipeline; the cylinder push rod (23) is provided on one side of the conveying trough (118) and on the rear side of the heating pipe (22).

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