An environmentally friendly plastic granulator for recycling waste plastics

Abstract

The invention discloses a technical field of plastic granulators, specifically an environment-friendly plastic granulator for recycling waste plastics, comprising a frame and a granulator main body, the granulator main body is fixedly mounted on the upper end of the frame, one end of the frame is provided with a feed box below the discharge end of the granulator main body, a screening box is fixedly mounted on the upper end of the feed box, the left and right sides of the screening box are both open, a cooling barrel is fixedly connected to the upper end of the screening box, an inclined feed pipe is fixedly connected to the side of the cooling barrel, and the higher end of the feed pipe is fixedly connected to the discharge end of the granulator main body. The invention has the following beneficial effects: the plastic particles cut by the discharge end of the granulator main body slide downwards along the feed pipe to the inner cavity of the cooling barrel, and after the plastic particles enter the cooling barrel, they slide downwards along the spiral plate; cold air is introduced into the inner cavity of the transmission circular pipe through the air intake mechanism, and the cold air flows along the inner cavity of the connecting pipe into the spiral cavity of the spiral plate.

Description

Technical Field

[0001] The invention relates to the technical field of plastic granulators, in particular to an environmentally friendly plastic granulator for recycling waste plastics. Background Art

[0002] The recycling and resource development of waste plastics is derived from a deep understanding of the environment and resources. Reducing the pollution of waste plastics to the environment and reducing the waste of resources is a way of survival and a major event that benefits the country and the people. The most common way to deal with the recycling and resource development of waste plastics is to use plastic recycling. Plastic recycling is to put waste plastics into its body and use stirring granulation, pressure molding granulation, hot melt molding granulation and other methods to form a certain shape of recycled resources.

[0003] The outlet end of the existing waste plastic recycling granulation device lacks a plastic particle cooling mechanism. The temperature of the cut plastic particles is relatively high. If they are cooled naturally, it will take a long time, which is not conducive to subsequent collection and processing. In addition, the plastic particles that have just been cut are very hot, so some plastic particles will easily stick together after being piled together, causing the plastic particles to form plates, thereby affecting the quality of the final plastic particles. Summary of the invention

[0004] The purpose of the present invention is to provide an environmentally friendly plastic granulator for recycling waste plastics to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An environmentally friendly plastic granulator for recycling waste plastics comprises a frame and a granulator body, wherein the granulator body is fixedly mounted on the upper end of the frame, a feed box is mounted on one end of the frame below the discharge end of the granulator body, a screening box is fixedly mounted on the upper end of the feed box, both left and right sides of the screening box are open, a cooling barrel is fixedly connected to the upper end of the screening box, an inclined feed pipe is fixedly connected to the side of the cooling barrel, and a higher end of the feed pipe is fixedly connected to the discharge end of the granulator body;

[0007] An inverted cone-shaped bucket is fixedly connected to the lower end of the inner cavity of the cooling barrel, and an annular protrusion is protruding downward from the lower end of the inverted cone-shaped bucket. A cooling mechanism for plastic particles is installed in the cooling barrel, and a concave plate is fixedly connected to the upper end of the cooling barrel, and an air intake mechanism is installed on the concave plate. A translation seat is movably connected to the side of the screening box, and the upper end of the translation seat is symmetrically recessed downward to form a circular through groove, and screening mechanisms for plastic particles are installed in both circular through grooves.

[0008] As a further solution of the present invention, a discharge port is provided on the side of the discharge box, an inclined discharge plate is fixedly installed on the bottom of the discharge box, a through opening is provided on the side of the screening box, a discharge hopper and a loading platform are fixedly connected to the side of the screening box, the loading platform is arranged below the discharge hopper, and the discharge hopper is arranged outside the through opening.

[0009] As a further solution of the present invention, the cooling mechanism includes a transmission circular tube rotatably installed in the inner cavity of the cooling barrel, the upper end of the transmission circular tube passes upward through the upper end of the cooling barrel and is fixedly sleeved with a transmission gear, a limit ring is fixedly sleeved on the transmission circular tube, the limit ring and the transmission gear are symmetrically distributed on the upper and lower sides of the top of the cooling barrel, the side of the transmission gear is meshed with a driving gear, and the driving gear is driven by a motor shaft of a servo motor fixedly installed on the upper end of the concave plate;

[0010] A spiral plate is fixedly connected to the cylindrical surface of the transmission circular tube, a spiral cavity is opened in the spiral plate, a plurality of air outlets are spirally opened at the lower end of the spiral plate, the air outlets are connected with the spiral cavity, a connecting pipe is fixedly connected to the lower end of the spiral plate, a circular hole matching the connecting pipe is opened on the side of the transmission circular tube, the connecting tube is plugged into the circular hole, the inner cavity of the connecting tube is connected with the inner cavity of the transmission circular tube, a strip groove is opened on the side of the connecting tube, and the strip groove is connected with the spiral cavity.

[0011] As a further solution of the present invention, the lower end of the transmission circular tube extends downward into the annular protrusion of the inverted cone bucket, and a plurality of dispersion rods are welded to the lower end of the transmission circular tube in an annular array.

[0012] As a further solution of the present invention, the air intake mechanism includes a rotating seat fixedly installed on the upper end of the transmission circular tube, a docking groove is opened at the upper end of the rotating seat, a docking tube is fixedly inserted into the upper end of the concave plate, the lower end of the docking tube passes downward through the concave plate and is fixedly sleeved with a sealing ring, the docking tube is inserted into the inner cavity of the rotating seat, the sealing ring is rotatably connected to the docking groove, and the upper end of the docking tube is connected to the air intake pipe through a pipe joint.

[0013] As a further solution of the present invention, the lower end of the transmission circular tube is fixedly connected with an extrusion block, which extends downward to the inner cavity of the screening box, and the left and right sides of the screening box are symmetrically fixedly connected with concave frames, and the front and rear sides of the inner cavity of the concave frame and the front and rear sides of the inner cavity of the screening box are symmetrically provided with slide grooves, and a hydraulic cylinder is fixedly installed on one side of one of the concave frames, and the end of the piston rod of the hydraulic cylinder is fixedly connected to the translation seat, and the front and rear sides of the translation seat are symmetrically fixedly connected with slide plates, and the slide plate is slidably connected to the slide groove left and right, and the inner side wall of the circular through groove is penetrated with a discharge port;

[0014] A notch is provided at the upper end of the translation seat between the two circular through grooves, and a rubber sealing plate is symmetrically fixedly connected to the inner side of the notch. One end of the two rubber sealing plates fits tightly, and the ends of the two rubber sealing plates that contact each other are embedded with magnet bars, and the two magnet bars are adsorbed and connected to each other.

[0015] As a further solution of the present invention, the screening mechanism includes an annular limiting tube rotatably installed in a circular through groove, the outer cylindrical surface of the annular limiting tube is fixedly connected with a plurality of driving rods in an annular array, the upper end of the inner cavity of the annular limiting tube is provided with a plurality of mounting grooves in an annular array, the upper end of the annular limiting tube is provided with a conical screening plate, the upper end of the conical screening plate is provided with a plurality of screening holes in an annular array extending downward, the lower end of the conical screening plate is fixedly connected with a plurality of convex mounting blocks in an annular array, the convex portions on the sides of the convex mounting blocks are engaged with the mounting grooves, and the convex mounting blocks are fixedly connected to the annular limiting tube;

[0016] A vibration column is fixedly inserted through the upper end of the conical screening plate from top to bottom, and a regular polygonal groove is opened through the upper end of the vibration column from top to bottom. A plurality of corrugated plates are fixedly connected in a circular array on the upper end of the conical screening plate, and a regular polygonal column is inserted through the regular polygonal groove.

[0017] As a further solution of the present invention, a groove is provided at the upper end of the regular polygonal column, the groove is engaged with the extrusion block, and the regular polygonal column is connected to the regular polygonal groove by sliding up and down;

[0018] The lower end of the groove is provided with a contraction groove downward, the side surface of the lower end of the regular polygonal column is symmetrically fixedly connected with a reinforcement plate, the ends of the two reinforcement plates that are away from each other are fixedly connected to the inner side of the annular plate, the lower ends of the regular polygonal column and the reinforcement plate are fixedly connected with a strip plate, and movable grooves are symmetrically provided in the strip plate, and a locking mechanism is installed on the regular polygonal column;

[0019] The inner cavity of the circular through groove is provided with a corrugated groove, an annular groove and two positioning grooves in sequence from top to bottom; the driving rod is slidably connected to the corrugated groove; and the annular plate is rotatably connected to the annular groove.

[0020] As a further scheme of the present invention, the locking mechanism includes a transmission rod slidably installed in the contraction groove up and down, the lower end of the transmission rod is fixedly connected to a light rod, the lower end of the light rod passes downward through a regular polygonal column and a strip plate in sequence and is fixedly connected to a connecting head, the upper end of the light rod is sleeved with a return spring, the upper and lower ends of the return spring are respectively abutted against the lower end of the transmission rod and the bottom of the contraction groove, both ends of the connecting head are rotatably connected to a movable plate through a rotating shaft, the two movable plates are distributed in an eight-shape, and the ends of the two movable plates away from the connecting head are hinged with a positioning plug plate through a hinge, and one end of the positioning plug plate is fixedly installed with an elastic sheet.

[0021] As a further solution of the present invention, the positioning plug plate is slidably connected to the movable groove, one end of the positioning plug plate is plugged into the positioning groove, and one side of the elastic sheet abuts against the inner side of the movable groove.

[0022] The beneficial effects of the present invention are:

[0023] 1. The cut plastic particles at the discharge end of the granulator body slide down along the feed pipe to the inner cavity of the cooling barrel. After entering the cooling barrel, the plastic particles slide down along the spiral plate. Cold air is introduced into the inner cavity of the transmission round tube through the air intake mechanism. The cold air flows along the inner cavity of the connecting pipe into the spiral cavity of the spiral plate, and finally flows downward along the air outlet at the lower end of the spiral plate, thereby cooling the plastic particles on the spiral plate.

[0024] 2. After the cut plastic particles enter the cooling barrel, they fall onto the spiral plate of the screening mechanism. At the same time, the cooling mechanism rotates, so that the plastic particles can slide down along the spiral plate well. At the same time, the plastic particles will roll down along the spiral plate, and then cooperate with the cold air blown downward from the air outlet, so that the plastic particles can be well cooled and cooled, which can effectively prevent the plastic particles from sticking to each other.

[0025] 3. After the plastic particles enter the inverted cone bucket, they slide down into the annular protrusion. At this time, the transmission tube drives the dispersion rod to rotate, and the plastic particles are stirred and dispersed by the dispersion rod, so as to further prevent the plastic particles from sticking together. The dispersed plastic particles slide down along the annular protrusion to the conical screening plate in the circular groove. The screening mechanism rotates, so that the conical screening plate shakes up and down during the rotation, so that the plastic particles can be well screened. At the same time, the conical screening plate shakes up and down, so as to prevent the screening holes on the conical screening plate from being blocked; the corrugated plate is rotated, so that the larger and unqualified plastic particles screened out slide out along the discharge port, slide down through the port and the discharge hopper to the loading platform for collection, so as to facilitate the recycling and reuse of the larger and unqualified plastic particles; the qualified plastic particles after screening fall down into the discharge box, then slide down along the discharge plate at the bottom of the discharge box, and finally slide along the discharge port to the outside of the discharge box for collection.

[0026] 4. When a screening mechanism needs to be cleaned, maintained, repaired and replaced after screening plastic particles for a long time, the piston rod of the hydraulic cylinder is extended and retracted to drive the translation seat to move left or right, so that a circular through groove of the translation seat drives the screening mechanism therein to move out of the screening box, and at the same time, another circular through groove drives the screening mechanism therein to move into the screening box, thereby completing the replacement of the screening mechanism, making it convenient to clean, maintain and repair the used screening mechanism, and the replacement method is simple and convenient, which greatly improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A structural stereogram of an environment-friendly plastic granulator for recycling waste plastics according to the present invention;

[0028] Figure 2 It is a front cross-sectional view of the structure of the environment-friendly plastic granulator for recycling waste plastics of the present invention;

[0029] Figure 3 A side cross-sectional view of the structure of an environmentally friendly plastic granulator for recycling waste plastics of the present invention;

[0030] Figure 4 A bottom view of the cooling mechanism structure of the present invention;

[0031] Figure 5 This is an exploded view of the cooling barrel, feed pipe, and cooling mechanism structure of the present invention;

[0032] Figure 6 for Figure 5 A schematic diagram of the structure enlargement in the middle;

[0033] Figure 7 It is a cross-sectional view of the translation seat, screening mechanism and locking mechanism of the present invention;

[0034] Figure 8 It is a cross-sectional view of the translation seat and the screening mechanism structure of the present invention;

[0035] Fig. 9 It is an exploded view of the translation seat, screening mechanism and locking mechanism structure of the present invention;

[0036] Fig.10 It is an exploded view of the transmission circular tube, extrusion block, regular polygonal column and locking mechanism structure of the present invention.

[0037] In the figure: 1, frame; 11, granulator body; 12, unloading box; 13, screening box; 131, discharge hopper; 132, loading platform; 14, cooling barrel; 15, feed pipe; 16, inverted cone bucket; 2, transmission round pipe; 21, dispersion rod; 22, spiral plate; 23, spiral cavity; 24, air outlet; 25, transmission gear; 26, driving gear; 27, concave plate; 28, extrusion block; 3, butt pipe; 31, air inlet pipe; 32, rotating seat; 33, butt groove; 4, concave frame; 41, slide groove; 42, hydraulic cylinder; 43, translation seat; 44, circular through groove; 441, corrugated groove; 44 2. Annular groove; 443. Positioning groove; 45. Discharge port; 46. Slide plate; 47. Notch; 48. Rubber sealing plate; 5. Annular limit tube; 51. Drive rod; 52. Mounting groove; 53. Conical screening plate; 54. Screening hole; 55. Vibrating column; 56. Regular polygonal groove; 57. Corrugated plate; 6. Convex mounting block; 7. Regular polygonal column; 71. Groove; 72. Contraction groove; 73. Reinforcement plate; 74. Annular plate; 75. Strip plate; 76. Movable groove; 8. Transmission rod; 81. Light rod; 82. Return spring; 83. Connector; 84. Movable plate; 85. Positioning plug plate; 86. Elastic sheet. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0039] See also Figures 1 to 10 An environmentally friendly plastic granulator for recycling waste plastics comprises a frame 1 and a granulator body 11, the granulator body 11 is fixedly mounted on the upper end of the frame 1, a feed box 12 is mounted at one end of the frame 1 below the discharge end of the granulator body 11, a screening box 13 is fixedly mounted on the upper end of the feeding box 12, the left and right sides of the screening box 13 are both open, a cooling barrel 14 is fixedly connected to the upper end of the screening box 13, a circular connecting port is provided at the upper end of the screening box 13 and the lower end of the cooling barrel 14, a feed pipe 15 arranged obliquely is fixedly connected to the side of the cooling barrel 14, and a higher end of the feed pipe 15 is connected to the granulator body 1 1 is fixedly connected to the discharge end of the granulator body 11, and the plastic particles cut off by the granulator body 11 slide down along the feed pipe 15 into the cooling barrel 14. The lower end of the inner cavity of the cooling barrel 14 is fixedly connected with an inverted cone bucket 16, and the lower end of the inverted cone bucket 16 protrudes downward and is provided with an annular protrusion. A cooling mechanism for plastic particles is installed in the cooling barrel 14, and a concave plate 27 is fixedly connected to the upper end of the cooling barrel 14, and an air intake mechanism is installed on the concave plate 27. A translation seat 43 is movably inserted on the side of the screening box 13, and the upper end of the translation seat 43 is symmetrically recessed downward to open a circular through groove 44, and the two circular through grooves 44 are both installed with a screening mechanism for plastic particles.

[0040] See also Figure 1and Figure 3 A discharge port is provided on the side of the discharge box 12, an inclined discharge plate is fixedly installed on the bottom of the discharge box 12, circular interfaces are provided at the upper end of the discharge box 12 and the lower end of the screening box 13, a through opening is provided on the side of the screening box 13, a discharge hopper 131 and a loading platform 132 are fixedly connected to the side of the screening box 13, the loading platform 132 is arranged below the discharge hopper 131, and the discharge hopper 131 is arranged on the outside of the through opening.

[0041] The larger, unqualified particles are screened out in the screening box 13, and the particles slide down along the discharge hopper 131 to the loading platform 132 for collection, so as to facilitate recycling and reuse;

[0042] The qualified plastic particles slide down into the discharge box 12, then slide down along the discharge plate at the bottom of the discharge box 12, and finally slide along the discharge port to the outside of the discharge box 12 for collection.

[0043] See also Figures 2 to 5 The cooling mechanism includes a transmission circular tube 2 rotatably mounted in the inner cavity of the cooling barrel 14, the lower end of the transmission circular tube 2 is sealed, the upper end of the transmission circular tube 2 is open, the upper end of the transmission circular tube 2 passes upward through the upper end of the cooling barrel 14 and is fixedly sleeved with a transmission gear 25, a limit ring is fixedly sleeved on the transmission circular tube 2, the limit ring and the transmission gear 25 are symmetrically distributed on the upper and lower sides of the top of the cooling barrel 14, the transmission gear 25 and the limit ring are both in rotational contact with the top of the cooling barrel 14, the side of the transmission gear 25 is meshed with a driving gear 26, and the driving gear 26 is driven by the motor shaft of the servo motor fixedly mounted on the upper end of the concave plate 27;

[0044] A spiral plate 22 is fixedly connected to the cylindrical surface of the transmission circular tube 2, a spiral cavity 23 is opened in the spiral plate 22, a plurality of air outlets 24 are spirally opened at the lower end of the spiral plate 22, the air outlets 24 are connected with the spiral cavity 23, a connecting pipe is fixedly connected to the lower end of the spiral plate 22, a circular hole matching the connecting pipe is opened on the side of the transmission circular tube 2, the connecting tube is plugged into the circular hole, the inner cavity of the connecting tube is connected with the inner cavity of the transmission circular tube 2, a strip groove is opened on the side of the connecting tube, and the strip groove is connected with the spiral cavity 23.

[0045] The motor shaft of the servo motor drives the driving gear 26 to rotate, the driving gear 26 drives the transmission gear 25 to rotate, the transmission gear 25 drives the transmission tube 2 to rotate, and the transmission tube 2 drives the spiral plate 22 and the dispersion rod 21 to rotate;

[0046] After the cut plastic particles enter the cooling barrel 14, they slide down along the spiral plate 22, and finally fall down from the spiral plate 22 into the inverted cone bucket 16, and then slide down along the inverted cone bucket 16 into the screening box 13, and the plastic particles are screened by the screening box 13;

[0047] The cooled gas flows downward along the inner cavity of the transmission circular tube 2, flows along the inner cavity of the connecting tube into the spiral cavity 23 of the spiral plate 22, and finally flows downward along the gas outlet 24 at the lower end of the spiral plate 22, thereby cooling the plastic particles on the spiral plate 22;

[0048] At the same time, the cooling gas will cool the spiral plate 22 when flowing along the spiral cavity 23, so that the spiral plate 22 can cool the plastic particles;

[0049] When the plastic particles slide down along the spiral plate 22 , they will roll downward along the spiral plate 22 , and combined with the cold air blown downward from the air outlet 24 , the plastic particles can be well cooled and the plastic particles can be effectively prevented from sticking to each other.

[0050] The lower end of the transmission circular tube 2 extends downward into the annular protrusion of the inverted cone bucket 16 , and a plurality of dispersion rods 21 are welded to the lower end of the transmission circular tube 2 in an annular array.

[0051] After the plastic particles enter the inverted cone bucket 16, they slide down into the annular protrusion. At this time, the transmission tube 2 drives the dispersion rod 21 to rotate, and the dispersion rod 21 stirs and disperses the plastic particles to further prevent the plastic particles from sticking together. The dispersed plastic particles slide down along the annular protrusion.

[0052] See also Figure 5 and Figure 6 The air intake mechanism includes a rotating seat 32 fixedly mounted on the upper end of the transmission circular tube 2, a docking groove 33 is opened at the upper end of the rotating seat 32, a docking pipe 3 is fixedly inserted at the upper end of the concave plate 27, the lower end of the docking pipe 3 passes downward through the concave plate 27 and is fixedly sleeved with a sealing ring, the docking pipe 3 is inserted into the inner cavity of the rotating seat 32, the sealing ring is rotatably connected to the docking groove 33, the upper end of the docking pipe 3 is connected to the air intake pipe 31 through a pipe joint, and one end of the air intake pipe 31 is connected to the air outlet end of the refrigerator through a pipe joint.

[0053] The cooling gas is introduced into the air inlet pipe 31 through the refrigerator, and the cold air flows downward along the air inlet pipe 31, the butt joint pipe 3, and the rotating seat 32 to the inner cavity of the transmission circular pipe 2;

[0054] When the transmission circular tube 2 rotates, the rotating seat 32 is driven to rotate, and the rotating seat 32 rotates along the docking tube 3. At the same time, the docking groove 33 at the upper end of the rotating seat 32 rotates along the sealing ring, thereby increasing the sealing between the docking tube 3 and the rotating seat 32, so that the cold air can be stably transmitted to the inner cavity of the transmission circular tube 2.

[0055] See also Figure 2 , Figures 7 to 9, the lower end of the transmission circular tube 2 is fixedly connected with an extrusion block 28, and the extrusion block 28 extends downward to the inner cavity of the screening box 13, and the lower end of the extrusion block 28 is at the upper end of the inner cavity of the circular through groove 44, and the lower end of the transmission circular tube 2 and the lower end of the annular protrusion are both above the circular through groove 44, and when the translation seat 43 moves left and right, the translation seat 43 will not contact the lower end of the transmission circular tube 2 and the annular protrusion, and the left and right sides of the screening box 13 are symmetrically fixedly connected with the concave frame 4, and the front and rear sides of the inner cavity of the concave frame 4 and the front and rear sides of the inner cavity of the screening box 13 are symmetrically provided with slide grooves 41, and one side of one of the concave frames 4 is fixedly installed with a hydraulic cylinder 42, and the end of the piston rod of the hydraulic cylinder 42 is fixedly connected to the translation seat 43, and the front and rear sides of the translation seat 43 are symmetrically fixedly connected with slide plates 46, and the slide plates 46 are slidably connected to the slide grooves 41 left and right, and the inner side wall of the circular through groove 44 is penetrated with a discharge port 45;

[0056] A notch 47 is provided at the upper end of the translation seat 43 between the two circular through grooves 44, and a rubber sealing plate 48 is symmetrically fixedly connected to the inner side of the notch 47. One end of the two rubber sealing plates 48 fits tightly, and the ends of the two rubber sealing plates 48 that contact each other are embedded with magnet bars, and the two magnet bars are adsorbed and connected to each other. When the circular through groove 44 is in the screening box 13, the discharge port 45 on the side of the circular through groove 44 is aligned with the through port on the side of the screening box 13.

[0057] The larger, unqualified plastic particles screened out slide along the discharge port 45 and the through port into the discharge hopper 131 .

[0058] The piston rod of the hydraulic cylinder 42 is extended and retracted to drive the translation seat 43 to move left and right, so that the two circular through grooves 44 on the translation seat 43 are reciprocated and alternately moved into the screening box 13, so that the two screening mechanisms can be used alternately;

[0059] When the translation seat 43 moves left and right, it drives the slide plate 46 to move left and right along the slide groove 41. At the same time, the lower end of the translation seat 43 slides left and right along the bottom of the screening box 13, so that the translation seat 43 can move stably.

[0060] See also Figure 3 , Figures 7 to 9 The screening mechanism includes an annular limiting tube 5 rotatably mounted in the circular through groove 44, the outer cylindrical surface of the annular limiting tube 5 is fixedly connected with a plurality of driving rods 51 in an annular array, the upper end of the inner cavity of the annular limiting tube 5 is provided with a plurality of mounting grooves 52 in an annular array, the upper end of the annular limiting tube 5 is provided with a conical screening plate 53, the upper end of the conical screening plate 53 is provided with a plurality of screening holes 54 penetrating downward in an annular array, the lower end of the conical screening plate 53 is fixedly connected with a plurality of convex mounting blocks 6 in an annular array, the convex portion on the side of the convex mounting block 6 is engaged with the mounting groove 52, and the convex mounting block 6 is fixedly connected to the annular limiting tube 5;

[0061] A vibration column 55 is fixedly inserted through the upper end of the conical screening plate 53 from top to bottom, and a regular polygonal groove 56 is opened through the upper end of the vibration column 55 from top to bottom. A plurality of corrugated plates 57 are fixedly connected to the upper end of the conical screening plate 53 in a circular array, and a regular polygonal column 7 is inserted through the regular polygonal groove 56.

[0062] A groove 71 is formed at the upper end of the regular polygonal column 7, and the groove 71 is engaged with the extrusion block 28, so that the regular polygonal column 7 is connected to the regular polygonal groove 56 by sliding up and down;

[0063] A contraction groove 72 is formed downward at the lower end of the groove 71, and a reinforcing plate 73 is symmetrically fixedly connected to the side of the lower end of the regular polygonal column 7. The ends of the two reinforcing plates 73 that are away from each other are fixedly connected to the inner side of the annular plate 74. A strip plate 75 is fixedly connected to the lower ends of the regular polygonal column 7 and the reinforcing plate 73. A movable groove 76 is symmetrically formed in the strip plate 75. A locking mechanism is installed on the regular polygonal column 7.

[0064] The inner cavity of the circular through groove 44 is provided with a corrugated groove 441, an annular groove 442 and two positioning grooves 443 from top to bottom. The two positioning grooves 443 are symmetrically distributed. The driving rod 51 is slidably connected to the corrugated groove 441, and the annular plate 74 is rotatably connected to the annular groove 442.

[0065] The transmission circular tube 2 drives the extrusion block 28 to rotate, the extrusion block 28 drives the regular polygonal column 7 to rotate, the regular polygonal column 7 drives the vibration column 55 to rotate, the vibration column 55 drives the conical screening plate 53 to rotate, the conical screening plate 53 drives the annular limiting tube 5 to rotate through the convex mounting block 6, and the annular limiting tube 5 drives the driving rod 51 to slide along the corrugated groove 441;

[0066] During the sliding of the driving rod 51 along the corrugated groove 441, the corrugated groove 441 is in an up-and-down undulating shape, so that the driving rod 51 can reciprocate up and down, and the driving rod 51 drives the annular limiting tube 5 to move up and down, so that the annular limiting tube 5 shakes up and down during the rotation process, and the annular limiting tube 5 drives the conical screening plate 53 to shake up and down during the rotation process;

[0067] When the conical screening plate 53 shakes up and down, it drives the regular polygonal groove 56 of the vibration column 55 to slide up and down along the regular polygonal column 7;

[0068] When the plastic particles fall onto the conical screening plate 53, the plastic particles can be screened well, and the conical screening plate 53 shakes up and down, thereby preventing the screening holes 54 on the conical screening plate 53 from being blocked;

[0069] The corrugated plate 57 is rotated so that the larger and unqualified plastic particles screened out slide out along the discharge port 45 .

[0070] See also Figure 7 and Fig.10 The locking mechanism includes a transmission rod 8 slidably installed in the contraction groove 72 up and down, and the lower end of the transmission rod 8 is fixedly connected with a light rod 81, and the lower end of the light rod 81 passes through the regular polygon column 7 and the strip plate 75 downward in sequence and is fixedly connected with the connecting head 83. The light rod 81 is slidably connected with the regular polygon column 7 and the strip plate 75 up and down, and the upper end of the light rod 81 is sleeved with a return spring 82, and the upper and lower ends of the return spring 82 are respectively abutted against the lower end of the transmission rod 8 and the bottom of the contraction groove 72, and both ends of the connecting head 83 are rotatably connected with a movable plate 84 through a rotating shaft. The two movable plates 84 are distributed in an eight-shaped shape, and the ends of the two movable plates 84 away from the connecting head 83 are hinged with a positioning plug plate 85 through a hinge, and one end of the positioning plug plate 85 is fixedly installed with an elastic sheet 86.

[0071] The positioning plug plate 85 is slidably connected to the movable groove 76, one end of the positioning plug plate 85 is plugged into the positioning groove 443, one side of the elastic sheet 86 is in contact with the inner side of the movable groove 76, and a strip groove is provided downwardly through the lower end of the movable groove 76. The connection between the positioning plug plate 85 and the movable plate 84 is arranged in the strip groove, so that the strip plate 75 will not cause obstruction during the rotation and movement of the movable plate 84.

[0072] When the polished rod 81 moves downward to the bottom, the connector 83 will not move downward out of the circular through slot 44 , that is, the locking mechanism is always in the circular through slot 44 during the process of moving up and down.

[0073] When the extrusion block 28 is engaged with the groove 71 at the upper end of the regular polygonal column 7, the extrusion block 28 squeezes the transmission rod 8, causing the transmission rod 8 to shrink into the shrinkage groove 72, and the transmission rod 8 squeezes the reset spring 82. At the same time, the transmission rod 8 drives the light rod 81 to move downward, and the light rod 81 drives the connecting head 83 to move downward, and the connecting head 83 drives the two movable plates 84 to rotate close to each other, and the movable plate 84 drives the positioning plug plate 85 to separate from the positioning groove 443, and at the same time, the positioning plug plate 85 is retracted into the movable groove 76, so that the locking mechanism can rotate synchronously with the screening mechanism.

[0074] When the screening mechanism needs to be replaced, the translation seat 43 is moved to the left or right. At this time, the extrusion block 28 is separated from the groove 71 at the upper end of a regular polygonal column 7, and the transmission rod 8 is pushed to move upward under the action of the elastic force of the reset spring 82. The transmission rod 8 drives the connecting head 83 to move upward through the light rod 81, and the connecting head 83 drives the two movable plates 84 to open outward. The movable plate 84 drives the positioning plug plate 85 to plug into the positioning groove 443 to prevent the screening mechanism from rotating or deviating when it does not need to rotate, affecting the next docking.

[0075] Working principle: The plastic particles cut at the discharge end of the granulator body 11 slide down along the feed pipe 15 to the inner cavity of the cooling barrel 14. After entering the cooling barrel 14, the plastic particles slide down along the spiral plate 22;

[0076] The refrigerator passes the cooling gas into the air inlet pipe 31, and the cold air flows downward along the air inlet pipe 31, the butt pipe 3, and the rotating seat 32 to the inner cavity of the transmission round pipe 2, and then flows along the inner cavity of the connecting pipe to the spiral cavity 23 of the spiral plate 22, and finally flows downward along the air outlet 24 at the lower end of the spiral plate 22, thereby cooling the plastic particles on the spiral plate 22;

[0077] At the same time, the cooling gas will cool the spiral plate 22 when flowing along the spiral cavity 23, so that the spiral plate 22 can cool the plastic particles;

[0078] The motor shaft of the servo motor drives the driving gear 26 to rotate, the driving gear 26 drives the transmission gear 25 to rotate, the transmission gear 25 drives the transmission tube 2 to rotate, and the transmission tube 2 drives the spiral plate 22 and the dispersion rod 21 to rotate;

[0079] After the cut plastic particles enter the cooling barrel 14, they slide down along the spiral plate 22, and finally fall from the spiral plate 22 into the inverted cone bucket 16, and then slide down along the inverted cone bucket 16 into the screening box 13, and the plastic particles are screened by the screening box 13.

[0080] When the transmission circular tube 2 rotates, the rotating seat 32 is driven to rotate, and the rotating seat 32 rotates along the docking tube 3. At the same time, the docking groove 33 at the upper end of the rotating seat 32 rotates along the sealing ring, thereby increasing the sealing between the docking tube 3 and the rotating seat 32, so that the cold air can be stably transmitted to the inner cavity of the transmission circular tube 2.

[0081] The spiral plate 22 is driven to rotate by the transmission circular tube 2, so that the plastic particles can slide down along the spiral plate 22 well. At the same time, the plastic particles will roll downward along the spiral plate 22, and the cold air blown downward from the air outlet 24 can be well cooled down to effectively prevent the plastic particles from sticking to each other.

[0082] After the plastic particles enter the inverted conical bucket 16, they slide downward into the annular protrusion. At this time, the transmission tube 2 drives the dispersion rod 21 to rotate, and the dispersion rod 21 stirs and disperses the plastic particles to further prevent the plastic particles from sticking together. The dispersed plastic particles slide downward along the annular protrusion to the conical screening plate 53 in the circular groove 44.

[0083] When the transmission tube 2 rotates, the extrusion block 28 is driven to rotate, the extrusion block 28 drives the regular polygonal column 7 to rotate, the regular polygonal column 7 drives the conical screening plate 53 to rotate through the vibration column 55, the conical screening plate 53 drives the annular limiting tube 5 to rotate through the convex mounting block 6, and the annular limiting tube 5 drives the driving rod 51 to slide along the corrugated groove 441;

[0084] When the driving rod 51 slides along the corrugated groove 441, the driving rod 51 drives the annular limiting tube 5 to move up and down, and the annular limiting tube 5 drives the conical screening plate 53 to shake up and down during the rotation, so that the plastic particles can be well screened. At the same time, the conical screening plate 53 shakes up and down, so as to prevent the screening holes 54 on the conical screening plate 53 from being blocked;

[0085] By rotating the corrugated plate 57, the larger and unqualified plastic particles screened out slide out along the discharge port 45, slide down through the through port and the discharge hopper 131 to the loading platform 132 for collection, so as to facilitate the recycling and reuse of the larger and unqualified plastic particles.

[0086] After screening, qualified plastic particles fall downward into the discharge box 12, then slide downward along the discharge plate at the bottom of the discharge box 12, and finally slide along the discharge port to the outside of the discharge box 12 for collection.

[0087] When the plastic particles are cooled and screened, the extrusion block 28 is clamped in the groove 71 at the upper end of the regular polygonal column 7. The extrusion block 28 squeezes the transmission rod 8 to move downward, so that the transmission rod 8 drives the light rod 81 to move downward. The light rod 81 drives the two positioning plates 85 to separate from the two positioning grooves 443 respectively through the connecting head 83 and the two movable plates 84, and at the same time, the positioning plates 85 are retracted into the movable groove 76, so that the locking mechanism can rotate synchronously with the screening mechanism.

[0088] When a screening mechanism has been used to screen plastic particles for a long time and needs to be cleaned, maintained, repaired and replaced, the piston rod of the hydraulic cylinder 42 is extended and retracted to drive the translation seat 43 to move left or right, so that a circular through groove 44 of the translation seat 43 drives the screening mechanism therein to move out of the screening box 13, and at the same time, another circular through groove 44 drives the screening mechanism therein to move into the screening box 13, thereby completing the replacement of the screening mechanism, making it convenient to clean, maintain and repair the used screening mechanism, and the replacement method is simple and convenient, which greatly improves the work efficiency;

[0089] During the movement of the translation seat 43, the extrusion block 28 at the lower end of the transmission tube 2 passes through the notch 47. When the extrusion block 28 contacts the rubber sealing plate 48, the extrusion block 28 pushes the two rubber sealing plates 48 to deflect and open, so that the extrusion block 28 can pass through. After the extrusion block 28 passes through, the rubber sealing plates 48 rebound and reset under the action of their own elasticity. At the same time, the two magnet bars at the ends of the two rubber sealing plates 48 are attracted to each other, so that the ends of the two rubber sealing plates 48 are connected.

[0090] When the extrusion block 28 is separated from the groove 71 at the upper end of a regular polygonal column 7, the transmission rod 8 is pushed upward under the action of the elastic force of the reset spring 82, and the transmission rod 8 drives the two movable plates 84 to open outward through the light rod 81 and the connecting head 83, so that the movable plate 84 drives the positioning plug plate 85 to plug into the positioning groove 443, thereby preventing the screening mechanism from rotating or deviating when it is not needed to rotate, thereby making the groove 71 at the upper end of the regular polygonal column 7 stable. When the regular polygonal column 7 needs to be docked with the extrusion block 28, the groove 71 at the upper end of the regular polygonal column 7 can be well docked with the extrusion block 28.

Claims

1. An environmentally friendly plastic granulator for recycling waste plastics, comprising a frame (1) and a granulator body (11), wherein the granulator body (11) is fixedly mounted on the upper end of the frame (1), characterized in that: A feed box (12) is installed at one end of the frame (1) below the discharge end of the granulator body (11); a screening box (13) is fixedly installed at the upper end of the feed box (12); both left and right sides of the screening box (13) are open; a cooling barrel (14) is fixedly connected to the upper end of the screening box (13); a feed pipe (15) arranged obliquely is fixedly connected to the side of the cooling barrel (14); a higher end of the feed pipe (15) is fixedly connected to the discharge end of the granulator body (11); The lower end of the inner cavity of the cooling barrel (14) is fixedly connected to an inverted cone bucket (16), and the lower end of the inverted cone bucket (16) is protruding downward and is provided with an annular protrusion. A cooling mechanism for plastic particles is installed in the cooling barrel (14), and the cooling mechanism includes a transmission tube (2) rotatably installed in the inner cavity of the cooling barrel (14), the lower end of the transmission tube (2) is sealed, and the upper end of the transmission tube (2) is open. The upper end of the transmission tube (2) passes through the upper end of the cooling barrel (14) upward and is fixedly sleeved with a transmission gear (25). A limit ring is fixedly sleeved on the transmission tube (2), and the limit ring and the transmission gear (25) are symmetrically distributed on the upper and lower sides of the top of the cooling barrel (14). The side of the transmission gear (25) is meshed with a drive gear (26), and the drive gear (26) is driven by the motor shaft of a servo motor fixedly installed on the upper end of the concave plate (27); The cylindrical surface of the transmission circular tube (2) is fixedly connected to a spiral plate (22), a spiral cavity (23) is provided in the spiral plate (22), a plurality of air outlets (24) are spirally provided at the lower end of the spiral plate (22), the air outlets (24) are communicated with the spiral cavity (23), a connecting pipe is fixedly connected to the lower end of the spiral plate (22), a circular hole matching the connecting pipe is provided on the side of the transmission circular tube (2), the connecting pipe is plugged into the circular hole, the inner cavity of the connecting pipe is communicated with the inner cavity of the transmission circular tube (2), a strip groove is provided on the side of the connecting pipe, the strip groove is communicated with the spiral cavity (23); The upper end of the cooling barrel (14) is fixedly connected to a concave plate (27), and an air intake mechanism is installed on the concave plate (27). The air intake mechanism includes a rotating seat (32) fixedly installed on the upper end of the transmission circular tube (2), and a docking groove (33) is provided at the upper end of the rotating seat (32). A docking pipe (3) is fixedly inserted at the upper end of the concave plate (27), and the lower end of the docking pipe (3) passes downward through the concave plate (27) and is fixedly sleeved with a sealing ring. The docking pipe (3) is inserted into the inner cavity of the rotating seat (32), and the sealing ring is rotatably connected to the docking groove (33). The upper end of the docking pipe (3) is connected to an air intake pipe (31) via a pipe joint. A translation seat (43) is movably inserted into the side of the screening box (13), and the upper end of the translation seat (43) is symmetrically recessed downward to form a circular through groove (44), and a screening mechanism for plastic particles is installed in both circular through grooves (44).

2. The environmentally friendly plastic granulator for recycling waste plastics according to claim 1 is characterized by: A material discharge port is provided on the side of the material discharge box (12); an inclined material discharge plate is fixedly installed on the bottom of the material discharge box (12); a through opening is provided on the side of the screening box (13); a discharge hopper (131) and a material loading platform (132) are fixedly connected to the side of the screening box (13); the material loading platform (132) is arranged below the discharge hopper (131), and the discharge hopper (131) is arranged outside the through opening.

3. The environmentally friendly plastic granulator for recycling waste plastics according to claim 1 is characterized by: The lower end of the transmission circular tube (2) extends downward into the annular raised portion of the inverted cone bucket (16), and a plurality of dispersion rods (21) are welded to the lower end of the transmission circular tube (2) in an annular array.

4. The environmentally friendly plastic granulator for recycling waste plastics according to claim 1 is characterized by: The lower end of the transmission circular tube (2) is fixedly connected to an extrusion block (28), which extends downward to the inner cavity of the screening box (13). The left and right sides of the screening box (13) are symmetrically fixedly connected to a concave frame (4), and the front and rear sides of the inner cavity of the concave frame (4) and the front and rear sides of the inner cavity of the screening box (13) are symmetrically provided with slide grooves (41), one side of one of the concave frames (4) is fixedly installed with a hydraulic cylinder (42), the end of the piston rod of the hydraulic cylinder (42) is fixedly connected to a translation seat (43), and the front and rear sides of the translation seat (43) are symmetrically fixedly connected to a slide plate (46), and the slide plate (46) is slidably connected to the slide groove (41) left and right, and a discharge port (45) is provided through the inner side wall of the circular through groove (44); A notch (47) is provided at the upper end of the translation seat (43) between the two circular through grooves (44), and a rubber sealing plate (48) is fixedly connected to the inner side of the notch (47) in a front-to-back symmetrical manner. One end of the two rubber sealing plates (48) fits tightly together, and a magnet bar is embedded in the ends of the two rubber sealing plates (48) that contact each other, and the two magnet bars are adsorbed and connected to each other.

5. The environmentally friendly plastic granulator for recycling waste plastics according to claim 4 is characterized by: The screening mechanism comprises an annular limiting tube (5) rotatably mounted in a circular through groove (44); the outer cylindrical surface of the annular limiting tube (5) is fixedly connected to a plurality of driving rods (51) in an annular array; the upper end of the inner cavity of the annular limiting tube (5) is provided with a plurality of mounting grooves (52) in an annular array; the upper end of the annular limiting tube (5) is provided with a conical screening plate (53); the upper end of the conical screening plate (53) is provided with a plurality of screening holes (54) penetrating downward in an annular array; the lower end of the conical screening plate (53) is fixedly connected to a plurality of convex mounting blocks (6) in an annular array; the convex portion on the side of the convex mounting block (6) is engaged with the mounting groove (52); and the convex mounting block (6) is fixedly connected to the annular limiting tube (5); A vibration column (55) is fixedly inserted through the upper end of the conical screening plate (53) from top to bottom, and a regular polygonal groove (56) is formed through the upper end of the vibrating column (55) from top to bottom. A plurality of corrugated plates (57) are fixedly connected to the upper end of the conical screening plate (53) in the form of a ring array, and a regular polygonal column (7) is inserted through the regular polygonal groove (56).

6. The environmentally friendly plastic granulator for recycling waste plastics according to claim 5, characterized in that: A groove (71) is formed at the upper end of the regular polygonal column (7), the groove (71) is engaged with the extrusion block (28), and the regular polygonal column (7) is connected to the regular polygonal groove (56) in an upward and downward sliding manner; The lower end of the groove (71) is provided with a contraction groove (72) downwardly, the side surface of the lower end of the regular polygonal column (7) is symmetrically fixedly connected to a reinforcing plate (73), the ends of the two reinforcing plates (73) that are away from each other are fixedly connected to the inner side of the annular plate (74), the lower ends of the regular polygonal column (7) and the reinforcing plate (73) are fixedly connected to a strip plate (75), the strip plate (75) is symmetrically provided with movable grooves (76), and a locking mechanism is installed on the regular polygonal column (7); The inner cavity of the circular through groove (44) is provided with a corrugated groove (441), an annular groove (442) and two positioning grooves (443) in sequence from top to bottom; the driving rod (51) is slidably connected to the corrugated groove (441); and the annular plate (74) is rotatably connected to the annular groove (442).

7. The environmentally friendly plastic granulator for recycling waste plastics according to claim 6, characterized in that: The locking mechanism comprises a transmission rod (8) slidably mounted in the contraction groove (72) up and down, a light rod (81) being fixedly connected to the lower end of the transmission rod (8), the lower end of the light rod (81) passing downward through the regular polygonal column (7) and the strip plate (75) in sequence and being fixedly connected to the connector (83), a return spring (82) being sleeved on the upper end of the light rod (81), the upper and lower ends of the return spring (82) respectively abutting against the lower end of the transmission rod (8) and the bottom of the contraction groove (72), both ends of the connector (83) being rotatably connected to movable plates (84) via a rotating shaft, the two movable plates (84) being distributed in an eight-shaped shape, the ends of the two movable plates (84) away from the connector (83) being hingedly connected to positioning plug plates (85) via hinges, one end of the positioning plug plates (85) being fixedly mounted with an elastic sheet (86).

8. The environmentally friendly plastic granulator for recycling waste plastics according to claim 7, characterized in that: The positioning plug plate (85) is slidably connected to the movable groove (76), one end of the positioning plug plate (85) is plugged into the positioning groove (443), and one side of the elastic sheet (86) is in contact with the inner side of the movable groove (76).

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