Waste plastic recycling and granulating device

Abstract

The invention relates to the technical field of granulation devices, in particular to a waste plastic recycling granulation device which comprises a support, a charging barrel is fixedly assembled on the upper surface of the support, an electric heating tube is arranged in the charging barrel in a penetrating mode, a granulation hole is formed in one end of the charging barrel, an auger blade is rotationally connected to the inner wall of the charging barrel, and the auger blade is arranged in the charging barrel. A first motor is fixedly assembled on the outer wall of the charging barrel, the output end of the first motor is fixedly connected with the auger blade, a hopper is fixedly communicated with the upper surface of the charging barrel, a third motor is fixedly assembled on the upper surface of the charging barrel, and a blade is fixedly assembled at the output end of the third motor. According to the invention, by arranging the screening structure, when waste plastic is recycled and granulated, the screening plate can screen crushed plastic materials, and the crushed plastic materials with larger volume can be remained above the screening plate, so that the situation that the crushed plastic materials with larger volume influence the granulating quality of the granulator is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of granulating devices, and particularly to a waste plastic recycling granulating device. Background Art

[0002] Plastic, as a kind of polymer, has stable chemical properties, and its natural degradation period can reach decades or even hundreds of years. If directly landfilled or incinerated, it will not only occupy a large amount of land resources, but also release toxic gases such as dioxins and microplastic pollutants, posing a serious threat to the ecological environment and human health. In order to avoid environmental pollution caused by waste plastics, it is necessary to recycle and reuse waste plastics. During the recycling process, waste plastics will be first cleaned and crushed, and then a granulator will be used to granulate the crushed materials of waste plastics.

[0003] In the prior art, there is a patent document with the authorization publication number of CN210436429U. This patent document discloses a plastic extrusion granulator, which includes a base, a feeding cylinder, an extrusion cylinder and an extrusion die head. The extrusion cylinder is fixedly arranged on the upper surface of the base, the feeding cylinder is fixedly arranged on the upper side of the extrusion cylinder, a spiral blade is arranged inside the extrusion cylinder, a first motor is fixedly arranged on the left side wall of the extrusion cylinder and the output end is fixedly connected with one end of the spiral blade, the extrusion die head is fixedly arranged at the right end of the extrusion cylinder, a top plate is horizontally arranged on the upper surface of the base and above the extrusion die head, four support rods are fixedly arranged at the four corners of the lower surface of the top plate, the lower ends of the four support rods are fixedly connected with the upper surface of the base, two fixing plates are symmetrically and fixedly arranged on the lower surface of the top plate, and a disc is arranged at the bottom between the two fixing plates. This utility model can clean the molten plastic adhered to the surface of the cutting blade, improve the smoothness of the surface of the cutting blade, and thus improve the cutting quality of plastic particles.

[0004] The above and the prior art have the following defects: During the process of using a granulator to process waste plastics, due to the uneven size of the crushed waste plastics, when the granulator heats and melts the smaller plastic crushed materials, the larger plastic crushed materials are difficult to be fully melted. Therefore, there will be a situation where there are particulate matters in the melted plastic, which has an adverse effect on the granulation quality of the granulator.

[0005] Therefore, a waste plastic recycling granulating device is proposed. Summary of the Invention

[0006] The purpose of the present invention is to solve the defect that when the granulator heats and melts the smaller plastic crushed materials, the larger plastic crushed materials are difficult to be fully melted, and thus there will be particulate matters in the melted plastic, and to propose a waste plastic recycling granulating device.

[0007] To achieve the above object, the present invention adopts the following technical solution: A waste plastic recycling granulation device, including a support, on the upper surface of the support is fixedly assembled a material cylinder, an electric heating tube is inserted into the material cylinder, a granulation hole is opened at one end of the material cylinder, a screw blade is rotatably connected to the inner wall of the material cylinder, a first motor is fixedly assembled on the outer wall of the material cylinder, and the output end of the first motor is fixedly connected to the screw blade. A hopper is fixedly communicated with the upper surface of the material cylinder, a third motor is fixedly assembled on the upper surface of the material cylinder, and a blade is fixedly assembled at the output end of the third motor. It further includes: a screening structure arranged on the inner circumferential surface of the hopper for screening waste plastic crushed materials, the screening structure includes a fixing plate fixedly installed on the inner circumferential surface of the hopper and a screening plate for screening waste plastic crushed materials; a cooling structure arranged on the surface of the support for cooling plastic particles, the cooling structure includes a T-shaped plate fixedly installed on the surface of the support and a hollow tube for conveying water, and a number of capillary pores are opened on the inner wall of the hollow tube; a separation structure arranged on the lower surface of the support for draining water from plastic particles, the separation structure includes a support plate fixedly installed on the lower surface of the support, a water guiding frame for guiding water flow, and a hole plate for draining water.

[0008] The effects achieved by the above components are as follows: By setting the screening structure, when recycling and granulating waste plastics, the screening plate will screen the plastic crushed materials. The larger-volume plastic crushed materials will remain above the screening plate, thus avoiding the situation that the larger-volume plastic crushed materials affect the granulation quality of the granulator. By setting the cooling structure, during the process of the cut plastic particles falling downward, they will come into contact with the water flow discharged from the capillary pores, and the water flow will cool down the plastic particles to avoid the situation of plastic particles sticking to each other. By setting the separation structure, after the cooled plastic particles fall onto the hole plate, the hole plate can separate the water from the plastic particles, thus facilitating the subsequent collection of plastic particles and further drying, improving the practicability of the granulator.

[0009] Preferably, a slide plate vertically and slidably penetrates through the fixing plate. An internally threaded tube is fixedly assembled on the upper surface of the slide plate. An externally threaded tube is threadedly connected to the inner circumferential surface of the internally threaded tube. The upper end of the externally threaded tube is fixedly connected to the screening plate. A rotating shaft is rotatably connected in the hopper. A transmission wheel is fixedly sleeved on the circumferential surface of the rotating shaft. The lower end of the slide plate abuts against the circumferential surface of the transmission wheel. A second motor is fixedly assembled on the outer circumferential surface of the hopper. The output end of the second motor is fixedly connected to the rotating shaft. A first spring is fixedly assembled on the upper surface of the fixing plate. One end of the first spring is fixedly connected to the slide plate.

[0010] The effects achieved by the above components are as follows: The rotation of the output end of the second motor drives the rotation of the rotating shaft, the rotating shaft drives the transmission wheel to rotate, the transmission wheel first presses the sliding plate, causing the sliding plate to slide upward along the inside of the fixed plate. The sliding of the sliding plate drives the internal threaded pipe to move synchronously, and the external threaded pipe follows the internal threaded pipe to drive the screening plate to move upward. At the same time, the first spring is stretched. When the transmission wheel continues to rotate, it disengages from the sliding plate. At this time, the first spring contracts, and the sliding plate quickly slides down due to the elastic force of the first spring, and the screening plate slides down synchronously. Therefore, as the second motor continues to operate, the screening plate will continuously vibrate in the vertical direction, thereby accelerating the passage of the plastic crushed material through the screening plate. The screening plate will screen the plastic crushed material. The larger-volume plastic crushed material will remain above the screening plate, thus avoiding the situation where the larger-volume plastic crushed material affects the granulation quality of the granulator.

[0011] Preferably, the vertical cross-section of the screening plate is triangular.

[0012] The effects achieved by the above components are as follows: The screening plate with a triangular vertical cross-section can make the larger-volume plastic crushed material slide to the edge of the screening plate, so that the plastic crushed material with qualified volume can normally slide down through the center of the screening plate.

[0013] Preferably, a plug is slidably connected to the inner wall of the external threaded pipe. The plug is in snap-fit connection with the internal threaded pipe, and the plug has a regular hexagonal prism structure.

[0014] The effects achieved by the above components are as follows: The plug with a regular hexagonal prism structure can limit the relative positions of the internal threaded pipe and the external threaded pipe, avoiding the situation where the internal threaded pipe and the external threaded pipe become loose due to vibration.

[0015] Preferably, a magnetic block is fixedly assembled at the upper end of the plug. The screening plate is made of galvanized iron, and the magnetic block abuts against the surface of the screening plate.

[0016] The effects achieved by the above components are as follows: The magnetic block will be attracted to the surface of the screening plate, preventing the plug from coming out.

[0017] Preferably, a retaining ring is fixedly assembled on the circumferential surface of the screening plate, and the outer circumferential surface of the retaining ring abuts against the inner circumferential surface of the hopper.

[0018] The effects achieved by the above components are as follows: The retaining ring can prevent the plastic crushed material from spilling during the process of removing the screening plate.

[0019] Preferably, a connecting rod is slidably connected in the T-shaped plate. The connecting rod is fixedly connected to the hollow pipe. A water pump is fixedly assembled on the surface of the support. The drainage end of the water pump is fixedly connected to a hose, the hose is fixedly connected to the hollow pipe, and the upper end of the hollow pipe is fixedly connected to an expansion pipe.

[0020] The effects achieved by the above components are as follows: Connect the external water source to the water inlet end of the water pump and turn on the water pump. The water pump will pressurize and discharge the water into the hose, and then the water will be discharged through the capillary holes on the inner wall of the hollow tube by the hose. During the process of the cut plastic particles falling downward, they will come into contact with the water flow discharged by the capillary holes, and the water flow will cool down the plastic particles to prevent the plastic particles from sticking to each other. The extension tube can guide the plastic particles to facilitate the sliding of the plastic particles out of the hollow tube.

[0021] Preferably, an extension plate is fixedly assembled on the outer wall of the hollow tube, an extension rod is fixedly assembled on the surface of the blade, and a second spring is sleeved on the surface of the connecting rod. The two ends of the second spring are respectively fixedly connected to the T-shaped plate and the connecting rod.

[0022] The effects achieved by the above components are as follows: The rotation of the blade will drive the movement of the extension rod. After the extension rod contacts the extension plate, it will squeeze the extension plate, and the extension plate will drive the hollow plate to slide. The hollow plate will drive the connecting rod to slide along the T-shaped plate. At this time, the second spring will be compressed or stretched. When the extension rod is separated from the extension plate, the connecting rod will drive the hollow tube to slide horizontally back and forth by the elastic force of the second spring, so that the water flow is discharged from different positions, improving the cooling effect.

[0023] Preferably, the support plate is fixedly connected to the water guide frame, the hole plate is fixedly installed on the inner wall of the water guide frame, and the hole plate is located below the hollow tube.

[0024] The effects achieved by the above components are as follows: The cooled plastic particles will fall onto the hole plate. The hole plate will block the plastic particles and make the plastic particles slide downward along the surface of the hole plate, while the water will flow through the hole plate and enter the inner wall of the water guide frame. The water guide frame will guide the water flow. The hole plate can separate the water from the plastic particles, which is convenient for subsequent collection and further drying of the plastic particles, improving the practicability of the granulator.

[0025] Preferably, an insertion plate is slidably penetrated in the water guide frame. The insertion plate is slidably connected to the hole plate, and a pulling hole is formed on the surface of the insertion plate.

[0026] The effects achieved by the above components are as follows: When it is necessary to replace the container, insert the insertion plate into the water guide frame. The insertion plate can block the plastic particles to prevent the plastic particles from spilling during the process of replacing the container.

[0027] Compared with the prior art, the advantages and positive effects of the present invention are as follows.

[0028] 1. In the present invention, by setting a screening structure, when recycling and granulating waste plastics, the screening plate will screen the plastic crushed materials. The plastic crushed materials with larger volume will remain above the screening plate, thus preventing the situation that the plastic crushed materials with larger volume affect the granulation quality of the granulator.

[0029] 2. In the present invention, by providing a cooling structure, during the process of the cut plastic particles falling downward, they will come into contact with the water flow discharged from the capillary pores, and the water flow will cool down the plastic particles to prevent the plastic particles from sticking to each other.

[0030] 3. In the present invention, by providing a separation structure, after the cooled plastic particles fall onto the orifice plate, the orifice plate can separate the water from the plastic particles, thus facilitating the subsequent collection of the plastic particles and further drying, improving the practicability of the granulator. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 is a schematic sectional view of the barrel of the present invention;

[0033] Figure 3 is a schematic sectional view of the hopper of the present invention;

[0034] Figure 4 is a schematic sectional view of the hopper of the present invention from another angle;

[0035] Figure 5 is a schematic exploded view of the screening plate of the present invention;

[0036] Figure 6 is a schematic diagram of the structure of the fixing plate of the present invention;

[0037] Figure 7 is a schematic diagram of the structure of the T-shaped plate of the present invention;

[0038] Figure 8 is a schematic diagram of the structure of the support plate of the present invention.

[0039] Legend: 1. Support; 2. Barrel; 3. Granulation holes; 4. Screw blade; 5. First motor; 6. Hopper; 7. Screening structure; 701. Fixing plate; 702. Slide plate; 703. Inner threaded tube; 704. Outer threaded tube; 705. Screening plate; 706. Rotating shaft; 707. Driving wheel; 708. First spring; 709. Plug; 710. Magnet; 711. Retaining ring; 712. Second motor; 8. Cooling structure; 81. T-shaped plate; 82. Connecting rod; 83. Hollow tube; 84. Water pump; 85. Hose; 86. Extension plate; 87. Extension rod; 88. Second spring; 89. Expansion tube; 9. Separation structure; 91. Support plate; 92. Water guide frame; 93. Orifice plate; 94. Plug plate; 95. Pulling hole; 10. Third motor; 11. Blade; 12. Electric heating tube. DETAILED DESCRIPTION OF THE INVENTION

[0040] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0041] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited by the specific embodiments disclosed in the following specification.

[0042] As Figures 1-8 shown, the present invention provides a waste plastic recycling granulation device, which includes a support 1. The upper surface of the support 1 is fixedly assembled with a barrel 2. An electric heating tube 12 is inserted into the barrel 2. A granulation hole 3 is opened at one end of the barrel 2. A screw blade 4 is rotatably connected to the inner wall of the barrel 2. The outer wall of the barrel 2 is fixedly assembled with a first motor 5. The output end of the first motor 5 is fixedly connected to the screw blade 4. The upper surface of the barrel 2 is fixedly communicated with a hopper 6. The upper surface of the barrel 2 is fixedly assembled with a third motor 10. The output end of the third motor 10 is fixedly assembled with a blade 11. It also includes: a screening structure 7 arranged on the inner circumferential surface of the hopper 6 for screening waste plastic broken materials. The screening structure 7 includes a fixing plate 701 fixedly installed on the inner circumferential surface of the hopper 6 and a sieve plate for screening waste plastic broken materials; a cooling structure 8 arranged on the surface of the support 1 for cooling plastic particles. The cooling structure 8 includes a T-shaped plate 81 fixedly installed on the surface of the support 1 and a hollow tube 83 for conveying water. A plurality of capillary holes are opened on the inner wall of the hollow tube 83; a separating structure 9 arranged on the lower surface of the support 1 for draining water from plastic particles. The separating structure 9 includes a support plate 91 fixedly installed on the lower surface of the support 1, a water guiding frame 92 for guiding water flow, and a hole plate 93 for draining water. By setting the screening structure 7, when recycling and granulating waste plastics, the screening plate 705 will screen the plastic broken materials. The larger-volume plastic broken materials will remain above the screening plate 705, thus avoiding the situation that the larger-volume plastic broken materials affect the granulation quality of the granulator. By setting the cooling structure 8, during the process of the cut plastic particles falling downward, they will contact the water flow discharged from the capillary holes. The water flow will cool down the plastic particles and avoid the situation that the plastic particles stick to each other. By setting the separating structure 9, after the cooled plastic particles fall onto the hole plate 93, the hole plate 93 can separate the water from the plastic particles, thus facilitating the subsequent collection of the plastic particles and further drying, and improving the practicability of the granulator.

[0043] Preferably, a sliding plate 702 vertically penetrates through the fixed plate 701. An internally threaded tube 703 is fixedly assembled on the upper surface of the sliding plate 702. An externally threaded tube 704 is threadedly connected to the inner circumferential surface of the internally threaded tube 703. The upper end of the externally threaded tube 704 is fixedly connected to the screening plate 705. A rotating shaft 706 is rotatably connected in the hopper 6. A transmission wheel 707 is fixedly sleeved on the circumferential surface of the rotating shaft 706. The lower end of the sliding plate 702 abuts against the circumferential surface of the transmission wheel 707. A second motor 712 is fixedly assembled on the outer circumferential surface of the hopper 6. The output end of the second motor 712 is fixedly connected to the rotating shaft 706. A first spring 708 is fixedly assembled on the upper surface of the fixed plate 701. One end of the first spring 708 is fixedly connected to the sliding plate 702. When the output end of the second motor 712 rotates, it will drive the rotating shaft 706 to rotate. The rotating shaft 706 will drive the transmission wheel 707 to rotate. The transmission wheel 707 will first squeeze the sliding plate 702, causing the sliding plate 702 to slide upward along the fixed plate 701. The sliding of the sliding plate 702 will drive the internally threaded tube 703 to move synchronously. The externally threaded tube 704 will drive the screening plate 705 to move upward following the internally threaded tube 703. At the same time, the first spring 708 will be stretched. When the transmission wheel 707 continues to rotate, it will be disengaged from the sliding plate 702. At this time, the first spring 708 contracts, and the sliding plate 702 will quickly slide downward due to the elastic force of the first spring 708. The screening plate 705 will slide downward synchronously. Therefore, as the second motor 712 continues to operate, the screening plate 705 will continuously vibrate in the vertical direction, thereby accelerating the passage of the plastic crushed material through the screening plate 705. The screening plate 705 will screen the plastic crushed material. The plastic crushed material with a larger volume will remain above the screening plate 705, thus avoiding the situation where the plastic crushed material with a larger volume affects the granulation quality of the granulator.

[0044] The vertical cross-section of the screening plate 705 is triangular. The screening plate 705 with a triangular vertical cross-section can make the plastic crushed material with a larger volume slide towards the edge of the screening plate 705, so that the plastic crushed material with a qualified volume can normally slide down through the center of the screening plate 705. A plug 709 is slidably connected to the inner wall of the externally threaded tube 704. The plug 709 is snap-connected to the internally threaded tube 703. The plug 709 has a regular hexagonal prism structure. The plug 709 with a regular hexagonal prism structure can limit the relative positions of the internally threaded tube 703 and the externally threaded tube 704, avoiding the situation where the internally threaded tube 703 and the externally threaded tube 704 become loose due to vibration. A magnetic block 710 is fixedly assembled at the upper end of the plug 709. The screening plate 705 is made of galvanized iron. The magnetic block 710 abuts against the surface of the screening plate 705. The magnetic block 710 will be attracted to the surface of the screening plate 705, preventing the plug 709 from coming out. A retaining ring 711 is fixedly assembled on the circumferential surface of the screening plate 705. The outer circumferential surface of the retaining ring 711 abuts against the inner circumferential surface of the hopper 6. The retaining ring 711 can prevent the plastic crushed material from spilling during the process of removing the screening plate 705.

[0045] A connecting rod 82 is slidably connected inside the T-shaped plate 81. The connecting rod 82 is fixedly connected to the hollow tube 83. A water pump 84 is fixedly assembled on the surface of the support 1. The drainage end of the water pump 84 is fixedly connected and communicated with a hose 85. The hose 85 is fixedly connected and communicated with the hollow tube 83. The upper end of the hollow tube 83 is fixedly connected and communicated with an extension tube 89. Connect the external water source to the water inlet end of the water pump 84 and turn on the water pump 84. The water pump 84 will pressurize and discharge the water into the hose 85. Then the water will pass through the hose 85 and be discharged through the capillary holes on the inner wall of the hollow tube 83. During the process of the cut plastic particles falling downward, they will come into contact with the water flow discharged from the capillary holes. The water flow will cool down the plastic particles to prevent the plastic particles from sticking to each other. The extension tube 89 can guide the plastic particles to facilitate the plastic particles to slide out of the hollow tube 83. An extension plate 86 is fixedly assembled on the outer wall of the hollow tube 83. An extension rod 87 is fixedly assembled on the surface of the blade 11. A second spring 88 is sleeved on the surface of the connecting rod 82. The two ends of the second spring 88 are respectively fixedly connected to the T-shaped plate 81 and the connecting rod 82. When the blade 11 rotates, it will drive the extension rod 87 to move. When the extension rod 87 contacts the extension plate 86, it will squeeze the extension plate 86. The extension plate 86 will drive the hollow plate to slide. The hollow plate will drive the connecting rod 82 to slide inside the T-shaped plate 81. At this time, the second spring 88 will be compressed or stretched. When the extension rod 87 is separated from the extension plate 86, the connecting rod 82 will drive the hollow tube 83 to slide horizontally back and forth by the elastic force of the second spring 88, so that the water flow is discharged from different positions, improving the cooling effect.

[0046] The support plate 91 is fixedly connected to the water guide frame 92. The orifice plate 93 is fixedly installed on the inner wall of the water guide frame 92. The orifice plate 93 is located below the hollow tube 83. The cooled plastic particles will fall onto the orifice plate 93. The orifice plate 93 will block the plastic particles and make the plastic particles slide downward along the surface of the orifice plate 93. And the water will flow through the orifice plate 93 and enter the inner wall of the water guide frame 92. The water guide frame 92 will guide the water flow. The orifice plate 93 can separate the water from the plastic particles, thus facilitating the subsequent collection of the plastic particles and further drying, improving the practicability of the granulator. An insertion plate 94 is slidably penetrated inside the water guide frame 92. The insertion plate 94 is slidably connected to the orifice plate 93. A pulling hole 95 is formed on the surface of the insertion plate 94. When it is necessary to replace the container, insert the insertion plate 94 into the water guide frame 92. The insertion plate 94 can block the plastic particles to prevent the plastic particles from spilling during the process of replacing the container.

[0047] The overall working principle is as follows. When recycling and granulating waste plastics, turn on the electric heating tube 12 in the barrel 2. The electric heating coil will heat the inner wall of the barrel 2. Then pour the plastic crushed material into the hopper 6, and turn on the first motor 5 and the second motor 712. The rotation of the output end of the second motor 712 will drive the rotation of the rotating shaft 706. The rotating shaft 706 will drive the rotation of the transmission wheel 707. The transmission wheel 707 will first squeeze the slide plate 702, causing the slide plate 702 to slide upward along the fixed plate 701. The sliding of the slide plate 702 will drive the synchronous movement of the internally threaded tube 703. The externally threaded tube 704 will follow the internally threaded tube 703 and drive the screening plate 705 to move upward. At the same time, the first spring 708 will be stretched. When the transmission wheel 707 continues to rotate, it will be disengaged from the slide plate 702. At this time, the first spring 708 contracts, and the slide plate 702 will quickly slide downward due to the elastic force of the first spring 708. The screening plate 705 will slide downward synchronously. Therefore, as the second motor 712 continues to operate, the screening plate 705 will continuously vibrate in the vertical direction, thus accelerating the passage of the plastic crushed material through the screening plate 705. The screening plate 705 will screen the plastic crushed material. The plastic crushed material with a larger volume will remain above the screening plate 705, thus avoiding the situation that the plastic crushed material with a larger volume affects the granulation quality of the granulator. The screening plate 705 with a triangular vertical cross-section can make the plastic crushed material with a larger volume slide to the edge of the screening plate 705, so that the plastic crushed material with a qualified volume can normally slide down through the center of the screening plate 705. During the vibration of the screening plate 705, the plug 709 with a regular hexagonal prism structure can limit the relative positions of the internally threaded tube 703 and the externally threaded tube 704, avoiding the situation that the internally threaded tube 703 and the externally threaded tube 704 become loose due to vibration. The magnet 710 will be attracted to the surface of the screening plate 705 to prevent the plug 709 from coming out. When it is necessary to take out the plastic crushed material with a larger volume, pull the magnet 710 to pull out the plug 709, then rotate the screening plate 705 to move the internally threaded tube 703 out of the externally threaded tube 704, and then pull out the screening plate 705 to clean the plastic crushed material remaining above the screening plate 705. The retaining ring 711 can prevent the plastic crushed material from spilling during the process of taking out the screening plate 705.

[0048] After the screened plastic scraps fall into the barrel 2, they will be heated and melted by the barrel 2. The first motor 5 will drive the auger blade 4 to rotate, and the auger blade 4 will convey the melted plastic. The melted plastic will be discharged through the granulation holes 3. At this time, the third motor 10 is turned on. The third motor 10 will drive the blade 11 to rotate to cut the plastic into granular form. At the same time, the external water source is connected to the water inlet end of the water pump 84, and the water pump 84 is turned on. The water pump 84 will pressurize and discharge the water into the hose 85. Then the water will be discharged through the capillary holes on the inner wall of the hollow tube 83 via the hose 85. During the process of the cut plastic particles falling downward, they will come into contact with the water flow discharged through the capillary holes. The water flow will cool down the plastic particles to prevent the plastic particles from sticking to each other. The rotation of the blade 11 will also drive the extension rod 87 to move. After the extension rod 87 contacts the extension plate 86, it will squeeze the extension plate 86. The extension plate 86 will drive the hollow plate to slide. The hollow plate will drive the connecting rod 82 to slide within the T-shaped plate 81. At this time, the second spring 88 will be compressed or stretched. When the extension rod 87 is disengaged from the extension plate 86, the connecting rod 82 will drive the hollow tube 83 to slide horizontally back and forth by means of the elastic force of the second spring 88, so that the water flow is discharged from different positions, improving the cooling effect. The extension tube 89 can guide the plastic particles, facilitating the plastic particles to slide out of the hollow tube 83.

[0049] The cooled plastic particles will fall onto the orifice plate 93. The orifice plate 93 will block the plastic particles, causing the plastic particles to slide downward along the surface of the orifice plate 93. And the water will flow through the orifice plate 93 and enter the inner wall of the water guide frame 92. The water guide frame 92 will guide the water flow. The orifice plate 93 can separate the water from the plastic particles, thus facilitating the subsequent collection and further drying of the plastic particles, improving the practicability of the granulator. Then the plastic particles are collected by means of a container. When the container needs to be replaced, the insertion plate 94 is inserted into the water guide frame 92. The insertion plate 94 can block the plastic particles to prevent the plastic particles from spilling during the process of replacing the container.

[0050] The above are only the preferred embodiments of the present invention, and are not limitations on the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A waste plastic recycling and pelletizing device, including a support (1), characterized in that: A hopper (2) is fixedly assembled on the upper surface of the support (1). An electric heating tube (12) is inserted into the hopper (2). A granulation hole (3) is formed at one end of the hopper (2). A screw blade (4) is rotatably connected to the inner wall of the hopper (2). A first motor (5) is fixedly assembled on the outer wall of the hopper (2). The output end of the first motor (5) is fixedly connected to the screw blade (4). A feed hopper (6) is fixedly communicated with the upper surface of the hopper (2). A third motor (10) is fixedly assembled on the upper surface of the hopper (2). A blade (11) is fixedly assembled at the output end of the third motor (10). Further included are: A screening structure (7) arranged on the inner circumferential surface of the feed hopper (6) for screening waste plastic crushed materials. The screening structure (7) includes a fixing plate (701) fixedly installed on the inner circumferential surface of the feed hopper (6) and a screening plate for screening waste plastic crushed materials; A cooling structure (8) arranged on the surface of the support (1) for cooling plastic particles. The cooling structure (8) includes a T-shaped plate (81) fixedly installed on the surface of the support (1) and a hollow tube (83) for conveying water. A number of capillary holes are formed on the inner wall of the hollow tube (83); A separation structure (9) arranged on the lower surface of the support (1) for draining water from plastic particles. The separation structure (9) includes a support plate (91) fixedly installed on the lower surface of the support (1), a water guiding frame (92) for guiding water flow, and a hole plate (93) for draining water.

2. The waste plastic recycling and pelletizing device according to claim 1, characterized in that: A sliding plate (702) vertically and slidably penetrates through the fixing plate (701). An internally threaded tube (703) is fixedly assembled on the upper surface of the sliding plate (702). An externally threaded tube (704) is threadedly connected to the inner circumferential surface of the internally threaded tube (703). The upper end of the externally threaded tube (704) is fixedly connected to the screening plate (705). A rotating shaft (706) is rotatably connected in the feed hopper (6). A transmission wheel (707) is fixedly sleeved on the circumferential surface of the rotating shaft (706). The lower end of the sliding plate (702) abuts against the circumferential surface of the transmission wheel (707). A second motor (712) is fixedly assembled on the outer circumferential surface of the feed hopper (6). The output end of the second motor (712) is fixedly connected to the rotating shaft (706). A first spring (708) is fixedly assembled on the upper surface of the fixing plate (701). One end of the first spring (708) is fixedly connected to the sliding plate (702).

3. The waste plastic recycling and pelletizing device according to claim 2, characterized in that: The vertical cross-section of the screening plate (705) is triangular.

4. The waste plastic recycling and pelletizing device according to claim 2, characterized in that: A plug pin (709) is slidably connected to the inner wall of the externally threaded tube (704). The plug pin (709) is engaged with the internally threaded tube (703). The plug pin (709) has a regular hexagonal prism structure.

5. A waste plastic recycling granulation device according to claim 4, characterized in that: A magnetic block (710) is fixedly assembled at the upper end of the plug pin (709). The screening plate (705) is made of galvanized iron. The magnetic block (710) abuts against the surface of the screening plate (705).

6. The waste plastic recycling and pelletizing device according to claim 2, characterized in that: A retaining ring (711) is fixedly assembled on the circumferential surface of the screening plate (705), and the outer circumferential surface of the retaining ring (711) abuts against the inner circumferential surface of the hopper (6).

7. A waste plastic recycling and pelletizing device according to claim 1, characterized in that: A connecting rod (82) is slidably connected inside the T-shaped plate (81). The connecting rod (82) is fixedly connected to a hollow tube (83). A water pump (84) is fixedly assembled on the surface of the support (1). The drainage end of the water pump (84) is fixedly communicated with a hose (85). The hose (85) is fixedly communicated with the hollow tube (83). The upper end of the hollow tube (83) is fixedly communicated with an extension tube (89).

8. The waste plastic recycling and pelletizing device according to claim 7, characterized in that: An extension plate (86) is fixedly assembled on the outer wall of the hollow tube (83). An extension rod (87) is fixedly assembled on the surface of the blade (11). A second spring (88) is sleeved on the surface of the connecting rod (82). The two ends of the second spring (88) are respectively fixedly connected to the T-shaped plate (81) and the connecting rod (82).

9. The waste plastic recycling and pelletizing device according to claim 7, characterized in that: The support plate (91) is fixedly connected to the water guide frame (92). The hole plate (93) is fixedly installed on the inner wall of the water guide frame (92). The hole plate (93) is located below the hollow tube (83).

10. A waste plastic recycling and pelletizing device according to claim 9, characterized in that: An insertion plate (94) slidably penetrates through the water guide frame (92). The insertion plate (94) is slidably connected to the hole plate (93). A pulling hole (95) is formed on the surface of the insertion plate (94).

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