Plastic bottle recycling device

Abstract

The invention discloses a plastic bottle recycling device, and relates to the technical field of plastic bottle recycling, the plastic bottle recycling device comprises a feeding unit, a label removing unit, a conveying unit, a cutting and screening unit and a post-processing unit, the feeding unit is used for conveying waste plastic bottles to the label removing unit, the label removing unit is used for removing labels on the waste plastic bottles, and the conveying unit is used for conveying the waste plastic bottles to the post-processing unit; the conveying unit conveys the waste plastic bottles with labels removed to the cutting and screening unit, the cutting and screening unit is used for cutting the waste plastic bottles with the labels removed into blocks and screening out needed fragments, and the post-processing unit is used for cleaning and collecting the fragments. The plastic bottle recycling device can be used for simultaneously treating plastic bottles with different sizes, different flat bottle bodies and different bottle cap retaining conditions, and is wide in application range.

Description

Technical Field

[0001] The invention relates to the technical field of plastic bottle recycling, and in particular to a plastic bottle recycling 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, which realizes the separation and recycling of bottle caps, labels and bottle bodies, which improves the purity and utilization rate of recycled materials, but still has at least the following problems: 1. It uses a blade to cooperate with a knife barrel to cut the label, so as to achieve label removal. For bottles of different sizes, knife barrels of different sizes need to be matched, and plastic bottles of different sizes cannot be recycled at the same time; 2. Rotary cutting can only be used for plastic bottles with intact and undeformed bottles. However, most of the discarded plastic bottles are incomplete or flat, and at least part of the label is pasted on the bottle body, otherwise the label cannot be fixed on the bottle body. Therefore, due to the adhesive, pure mechanical cutting is also difficult to completely cut off the label at the sticky position; 3. Discarded plastic bottles may have problems such as accumulated liquid and a lot of dust on the bottle body. After removing the bottle cap and label, they are directly flattened and collected, and the collected bottle body still needs further processing; 4. Discarded plastic bottles do not necessarily have bottle caps. For plastic bottles without bottle caps, there is no need to remove the bottle cap step. It is difficult for the current device to distinguish whether there is a bottle cap by itself. Summary of the invention

[0004] In view of the defects of the above-mentioned 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 the following technical solutions:

[0006] A plastic bottle recycling and processing device comprises 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 without labels to the cutting and screening unit, the cutting and screening unit comprises 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 the waste plastic bottles into the cutting roller group, the cutting roller group is used to cut the 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 arranged 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, the screw conveyor is vertically arranged 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 thereunder 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, and 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 arranged 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 a plurality of stirring arms. The second driving source is fixed on 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] Furthermore, the feeding unit comprises a feeding rack, a feeding channel, two limit plates and two guide plates, the feeding channel is fixed on the feeding rack, a bottle inlet for plastic bottles to enter horizontally is provided at the top of the feeding channel, a guide groove for the bottle mouth of the plastic bottle to pass through is provided on one side wall of the feeding channel, the feeding channel comprises an arc section and a stable section, the arc section extends downward in an arc shape from the bottle inlet, the stable section is connected to the end of the arc section, a bottle outlet is provided at the end of the stable section, the two limit plates are arranged in parallel on the outside of the bottle outlet, the limit plate is arranged perpendicular to the stable section, the two guide plates are arranged in parallel between the two limit plates, the height of the guide plate is less than the height of the limit plate, a limit rod is fixed on the bottom of the guide plate, the plastic bottle on the top of the guide plate can slide to the position of the limit rod under gravity, 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 part of the feeding rack, mounting frames are respectively provided on both sides of the front section of the conveying channel, a conveyor belt is provided in the mounting frame, the conveyor belt faces the conveying channel, the conveying plate is provided at the rear end of the mounting frame, the two conveying plates are respectively arranged on both sides of the conveying channel, 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 feed 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 arranged 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 arranging a feeding unit, removes labels on plastic bottles to avoid residues by arranging a label removal unit, cuts and screens plastic bottles by arranging a cutting and screening unit, and cleans and collects PET fragments by arranging 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 is a side view of the feeding unit in the present invention;

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

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

[0021] Figure 4 It is a schematic diagram of the structure 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 diagram of the structure of the cutting and screening unit and the post-processing unit in the present invention;

[0024] Figure 7 It is a 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. stable 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 seat; 116. rotating shaft; 117. third driving source; 118. conveying groove; 2. label removal unit; 21. air compressor; 22. heating pipe; 23. cylinder push rod; 24. air release port; 3. Conveying unit; 31. Clamping rotating part; 4. Cutting and screening unit; 41. 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. 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 in conjunction with 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 without labels to the cutting and screening unit 4, the cutting and screening unit 4 is used to cut the waste plastic bottles without labels 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 pool 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 pool 43 is arranged below the cutting roller group 42. The screening pool 43 is filled with a water medium. A baffle 47 and a screw conveyor 46 are fixedly provided in the screening pool 43. The baffle 47 is arranged 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 pool 43. The bottom wall of the screening pool 43 below the cutting roller group 42 is inclined. The screw conveyor 46 is vertically arranged on the outside of the baffle 47. A feed port 48 is provided at the bottom of the screw conveyor 46 and a discharge port 413 is provided at the top.

[0030] After the labels are removed, the discarded plastic bottles are left with the bottle body, bottle cap, residual liquid in the bottle 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 polymerization structures of the two plastics are different, 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 material or PET material, it can maintain stability in normal temperature water. At the same time, the density of water is between PE and PET, so water can be used as a medium to screen PE and PET.

[0031] For some plastic bottles without bottle caps, the cutting roller set 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] The baffle 47 is placed at the water surface to prevent the PE fragments on the water surface from floating over a large area and reduce the floating range of the PE fragments, which does not affect the collection of the PET fragments and also facilitates the centralized collection of the PE fragments. The bottom wall of the screening tank 43 is tilted, and the PET fragments sunk at the bottom of the screening tank 43 flow along the bottom wall of the screening tank 43 to the vicinity of the screw conveyor 46, and are transported from the feed port 48 at the bottom of the screw conveyor 46 to the discharge port 413 at the top, completing the collection of the PET fragments.

[0033] The post-processing unit 5 includes a processing box 51 , a discharge port 413 is introduced into the top of the processing box 51 , a stirring assembly 52 is arranged 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 arranged 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, which dries the collected PET fragments for recycling. The drying device can adopt existing technology and will not be described 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 plate 492 thereunder 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, so as to facilitate 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] The partition 410 can prevent the PET fragments from falling out of the discharge port 411 on the one hand, and can block the water medium on the other hand to prevent the water medium from directly flowing into the discharge port 411. When the water wheel 49 is not rotating, the PE fragments floating on the water surface will not directly fall into the discharge port 411. Only when the water wheel 49 rotates, the wheel plate 492 located below drives the PE fragments on the water surface, lifts the PE fragments and drops them into the discharge port 411. It should be noted that a post-processing unit 5 can also be set at the discharge port 411 to remove impurities and water mixed in 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 arranged at the position where the screw conveyor 46 is located, and the inclined portion 44 is inclined downward from the direction from the baffle 47 to the screw conveyor 46. The inclined portion 44 is conducive to the flow of PET fragments to the flat portion 45, and the flat portion 45 is convenient for fixing and installing 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 to clean 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 segment 121 and a stable segment 122. The arc segment 121 extends downward in an arc shape from the bottle inlet 15. The stable segment 122 is connected to the end of the arc segment 121. The stable segment 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 and the stable section 122 are arranged vertically, two guide plates 14 are arranged in parallel between the two limit plates 13, the height of the guide plates 14 is less than the height of the limit plates 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 requirements for the direction in which the plastic bottles enter the feeding channel 12 from the bottle inlet 15. The mouths of the plastic bottles should face the same direction, that is, the mouths of the plastic bottles should face 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, the plastic bottles will not turn in the feeding channel 12. Due to the existence of the stable section 122, the plastic bottles coming down from the arc section 121 will not fall directly on the guide plate 14, thus avoiding conveying errors.

[0043] The plastic bottle coming down from the arc section 121 pushes the plastic bottle on the stable section 122, and pushes the plastic bottle on the stable section 122 to 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, and the bottle mouth faces downward, and the bottle mouth is mounted between the two limit rods 18. During the sliding process of the plastic bottle, the two sides are restricted by the limit plates 13 and will not run out of the limit plates 13. The position of the limit plates 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, waiting 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 arranged in the middle of the feeding frame 11. Mounting frames 113 are respectively arranged on both sides of the front section of the conveying channel 19. A conveying belt 114 is arranged in the mounting frame 113. The conveying belt 114 faces the conveying channel 19. A conveying plate 110 is arranged at the rear end of the mounting frame 113. The two conveying plates 110 are respectively arranged on both sides of the conveying channel 19. The guide rod 111 and the guide plate 112 are respectively arranged 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 arranged 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, under the guidance of the guide rod 111 and the guide plate 112, the plastic bottles gradually fall down 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. The outer end of the rotating shaft 116 is rotatably disposed 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 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 groove 118.

[0049] refer to Figure 4The label removal unit 2 includes an air compressor 21, a heating tube 22 and a cylinder push rod 23 fixed on the feeding rack 11. The heating tube 22 is vertically arranged on one side of the conveying groove 118 and on the rear side of the feeding unit 1. The heating tube 22 is provided with an air vent 24 on the side facing the conveying groove 118. The air vent 24 is arranged along the length direction of the heating tube 22. A heating wire is arranged in the heating tube 22. The air compressor 21 introduces compressed air into the heating tube 22 through a pipeline. The cylinder push rod 23 is arranged on one side of the conveying groove 118 and on the rear side of the heating tube 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 toward 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 toward the label and the pasting position of 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: the 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 at the front to continue to move 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 at the stable section 122 to the two limit plates. 13, at this time, the plastic bottle is mounted 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 groove 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 air outlet 24, and the label on the plastic bottle The plastic bottle is cut off, and the clamping rotating member 31 rotates with the plastic bottle at the current position, and the high-pressure hot air continuously blows toward 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 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 clamping, and the cylinder push rod 23 extends out 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 pieces, and other impurities fall into the screening pool 43. The wheel 49 rotates to guide the PE fragments to the discharge port 411, and the PET fragments sink to the bottom of the water, flow along the bottom wall of the screening tank 43 to the vicinity of the screw conveyor 46, and 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, and 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 treatment, and 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 residues by setting a label removal unit 2, cuts and screens 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 bodies, 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 substitutions and improvements made within the spirit and principles of the present invention shall fall within the protection scope 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 the 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 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 waste 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) contains a water medium, and the screening tank (46) A baffle (47) and the screw conveyor (46) are fixedly provided in the sieving tank (43), the baffle (47) being provided below one side of the cutting roller group (42), the top of the baffle (47) protruding above the water surface of the water medium and the bottom not contacting the bottom wall of the sieving tank (43), the bottom wall of the sieving tank (43) below the cutting roller group (42) being inclined, the screw conveyor (46) being vertically provided on the outside of the baffle (47), the bottom of the screw conveyor (46) being provided with a feed inlet (48) and the top of the screw conveyor (46) being provided with a discharge outlet (413), the post-processing unit (5) comprising a processing box (51), the discharge outlet (413) being introduced into the top of the processing box (51), the processing box (51) being provided with a stirring assembly (52), the lower box wall of the processing box (51) being provided with a water outlet hole (53), and the bottom of the processing box (51) being provided with an opening and closing door (54).

2. A plastic bottle recycling device according to claim 1, characterized in that: The cutting and screening unit (4) further comprises a water wheel (49), the water wheel (49) comprising 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) therebelow can stir the water surface of the water medium.

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

4. The plastic bottle recycling device according to claim 1, characterized in that: The bottom wall of the screening tank (43) comprises an inclined portion (44) and a flat portion (45), wherein the flat portion (45) is arranged at the position where the screw conveyor (46) is located, 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) comprises 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); and a brush is wrapped and fixed on the stirring arms (523); and 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) comprises 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); 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 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 A bottle outlet (17) is provided at the end, 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), 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 plates (13), a limit rod (18) is fixed at the bottom of the guide plate (14), and a 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).

7. The plastic bottle recycling device according to claim 6, 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); the conveying channel (19) is arranged in the middle of the feeding frame (11); mounting frames (113) are respectively arranged on both sides of the front section of the conveying channel (19); a conveying belt (114) is arranged in the mounting frame (113); the conveying belt (114) faces the conveying channel (19); the conveying plate (110) is arranged at the rear end of the mounting frame (113); two conveying plates (110) are respectively arranged on both sides of the conveying channel (19); the guide rod (111) and the guide plate (112) are respectively arranged 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 a standing state to a lying state; the end of the conveying channel (19) is arranged at the position of the bottle inlet (15).

8. The plastic bottle recycling device according to claim 6, characterized in that: The feeding unit (1) further comprises a mounting seat (115), a rotating shaft (116) and a third driving source (117); 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).

9. The plastic bottle recycling device according to claim 6, 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) comprises 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).

10. The plastic bottle recycling device according to claim 9, characterized in that: The label removal unit (2) comprises 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 arranged 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).

Images