Plastic granulator utilizing recycled plastic

Abstract

The invention relates to the technical field of plastic processing equipment, in particular to a plastic granulator utilizing recycled plastics, which comprises a base, two symmetrically arranged supporting legs are fixedly connected to the inner wall of the base, the base and the supporting legs form a supporting device of the whole equipment, the inner walls of the two supporting legs are fixedly connected with the same gun barrel, and the inner walls of the two supporting legs are fixedly connected with the same gun barrel. The inner wall of the gun barrel is provided with a containing opening, and the inner wall of the containing opening is fixedly connected with a discharging hopper. According to the invention, through the gradual contraction and gradual expansion design of the outer barrel and the inner barrel and the variable-pitch structure of the outer spiral blade and the inner spiral blade, pressurization and deceleration retention of plastic raw materials are realized; the gradually-shrinking design of the outer barrel with the large left part and the small right part is matched with the variable pitch of the outer spiral blade with the sparse left part and the dense right part, materials are gradually pressurized in the right moving process, the melting efficiency is improved, a retention and shear strengthening area is formed through the synergistic effect of the conical pipe on the left half part of the inner barrel and the reverse variable pitch of the inner spiral blade, the heating time is prolonged, and sufficient melting of plastic is promoted.

Description

Technical Field

[0001] The invention relates to the technical field of plastic processing equipment, in particular to a plastic granulator utilizing recycled plastics. Background Art

[0002] With the increasing awareness of environmental protection and the urgent need for resource recycling, the reuse of recycled plastics has become an important way to solve the problems of plastic pollution and resource waste. In the processing of recycled plastics, plastic granulator is a key equipment, and its performance directly affects the quality and production efficiency of plastic particles. In the process of melting plastic, the plastic granulator in the prior art often has problems such as insufficient melting, uneven mixing and easy clogging of the equipment. When melting plastic, the existing granulator lacks effective pressurization and deceleration retention design, resulting in insufficient heating time and shear force of the plastic raw materials during the melting process, thus affecting the melting effect. At the same time, in the plastic extrusion molding process, due to the poor fluidity and mixing uniformity of the molten plastic, the equipment is prone to clogging, or after the melting is completed, the extrusion port is blocked by the retained molten plastic, affecting the continuity and stability of production. For this reason, we propose a plastic granulator using recycled plastic to solve the above problems. Summary of the invention

[0003] The object of the present invention is to provide a plastic granulator utilizing recycled plastics to solve the problems raised in the above background technology.

[0004] The technical solution of the present invention is: a plastic granulator utilizing recycled plastics, comprising a base, the inner wall of the base being fixedly connected to two symmetrically arranged legs, the base and the legs forming a supporting device for the entire device, the inner walls of the two legs being fixedly connected to the same barrel, the inner wall of the barrel being provided with a placement opening, the inner wall of the placement opening being fixedly connected to a lower hopper, the inner wall of the left half of the barrel being fixedly connected to two symmetrically arranged circular rings, the two circular rings forming an annular track, the inner wall of the annular track being rotatably connected to a disc, the left end of the disc being provided with a plurality of symmetrically arranged circular through holes, a plasticizing device for facilitating plastic melting being provided in the barrel, an extrusion molding device suitable for different specifications being provided at the right end of the barrel, an anti-blocking device for preventing the extrusion molding device from being blocked being provided in the barrel, and a driving device being provided on the base.

[0005] Preferably, the plasticizing device comprises an outer cylinder, which is arranged in a barrel, an outer spiral blade is fixedly connected to the surface of the outer cylinder, an arc-shaped opening 1 is opened on the surface of the outer cylinder, an inner cylinder is rotatably connected to the inner wall of the outer cylinder, a discharge opening is opened on the surface of the inner cylinder, a rotating rod is arranged in the inner cylinder, an inner spiral blade is fixedly connected to the surface of the rotating rod, a heating coil is sleeved on the surface of the inner cylinder, and the inner walls of the outer cylinder and the inner cylinder are provided with the same arc-shaped opening 2.

[0006] Preferably, the extrusion molding device includes a porous block, the porous block is fixed to the inner wall of the barrel, the inner wall of the porous block is rotatably connected to the right half surface of the outer cylinder, the inner wall of the porous block is fixedly connected to the right half surface of the inner cylinder, a plurality of symmetrically arranged diversion holes are provided at the left end of the porous block, a placement groove is provided on the surface of the porous block, a circular plate is rotatably connected to the right end of the porous block, a plurality of groups of symmetrically arranged circular holes are provided at the upper end of the circular plate, the size of each circular hole is the same as the size of the diversion hole, two symmetrically arranged arc grooves are provided on the surface of the circular plate, a circular groove is provided at the left end of the circular plate, and the inner wall of the circular groove A spring 1 is fixedly connected, a sphere is fixedly connected to the left end of the spring 1, an arc block is fixedly connected to the surface of the porous block, three symmetrically arranged limiting holes are opened at the right end of the arc block, the right end of the circular plate is rotatably connected to a gear ring, two symmetrically arranged sliders are fixedly connected to the surface of the gear ring, each of the sliders is slidably connected to the inner wall of the corresponding arc groove, a pointer is fixedly connected to the side wall of each slider, a scale block is fixedly connected to the surface of the porous block, a plurality of symmetrically arranged slide grooves 1 are opened at the upper end of the circular plate, a plurality of symmetrically arranged slide grooves 2 are opened at the upper end of the circular plate, and a plurality of A symmetrically arranged slide groove three, the inner wall of each of the slide grooves one is slidably connected to a group of symmetrically arranged mold blocks one, the upper surface of each of the mold blocks one is fixedly connected to a small cylinder one, a mold plate one is arranged above each group of mold blocks one, the lower end of each mold plate one is against the upper surface of the corresponding mold block one, and the upper end of each mold plate one is provided with a plurality of symmetrically arranged limiting grooves one, each of the limiting grooves one is slidably connected to the surface of the corresponding small cylinder one, the inner wall of each of the slide grooves two is slidably connected to a group of symmetrically arranged mold blocks two, the upper end of each of the mold blocks two is fixedly connected to a small cylinder two, and each group of the mold A mold plate 2 is arranged above each block 2, the lower end of each mold plate 2 is against the upper end of the corresponding mold block 2, a plurality of symmetrically arranged limit grooves 2 are opened on the upper end of each mold plate 2, each of which is slidably connected to the surface of the corresponding small cylinder 2, and a group of symmetrically arranged mold blocks 3 are slidably connected to the inner wall of each slide groove 3, and a small cylinder 3 is fixedly connected to the upper end of each mold block 3, a mold plate 3 is arranged above each group of mold blocks 3, the lower end of each mold plate 3 is against the upper end of the corresponding mold block 3, and a plurality of symmetrically arranged limit grooves 3 are opened on the upper end of each mold plate 3, Each of the limiting grooves three is slidably connected to the surface of the corresponding small cylinder three, each of the surfaces of the mold plate one, mold plate two and mold plate three is fixedly connected with a fan gear, each of the fan gears is meshed with the gear ring, the right end of the barrel is fixedly connected with a fixed plate, and the right end of the fixed plate is provided with a plurality of symmetrically arranged small holes, each of the small holes is on the same horizontal line as the corresponding diversion hole,The right end of the inner tube is rotatably connected to a rotating tube, the right end of the rotating rod penetrates the inner wall of the rotating tube and extends to the outside of the rotating tube, a cutter head is fixedly connected to the surface of the rotating tube, the cutter head abuts against the right end of the fixed disk, the right end of the fixed disk is fixedly connected to an outer cover, the surface of the outer cover is sleeved with a cooling tube, and the surface of the outer cover is connected through a discharge pipe.

[0007] Preferably, the anti-blocking device includes a plurality of symmetrically arranged threaded tubes, each of which is rotatably connected to the right end of the disc, a threaded rod is arranged on the inner wall of each threaded tube, the left end of each threaded rod penetrates the inner wall of the corresponding circular through hole and extends to the left side of the disc, the inner wall of each circular through hole is fixedly connected to two symmetrically arranged strip plates, the surface of each threaded rod is provided with two symmetrically arranged strip grooves, each strip plate of the circular through hole matches the strip groove of the corresponding threaded rod, the right end of each threaded rod penetrates the left end of the outer spiral blade and extends to the right side of the outer spiral blade, each threaded rod matches the size of the diversion hole, each threaded rod is transmission-connected to the corresponding threaded tube through a reciprocating thread, and the surface of each threaded rod is sleeved with A plurality of symmetrically arranged magnetic disks, each of the threaded rods is transmission-connected to the corresponding magnetic disk via a reciprocating thread, a small gear is fixedly connected to the surface of each threaded tube, and each of the small gears is meshingly connected to the same large gear, a plurality of parallel annular grooves are provided on the inner wall of the barrel, a permanent magnet ring is fixedly connected to the inner wall of each annular groove, and the inner wall of each permanent magnet ring is flush with the inner wall of the barrel, a pull rod is provided in the barrel, a plurality of symmetrically arranged rectangular grooves are provided on the surface of the right half of the pull rod, a spring 2 is fixedly connected to the inner wall of each rectangular groove, and a trapezoidal block is fixedly connected to the end of each spring 2 away from the pull rod, a plurality of symmetrically arranged rectangular holes are provided on the surface of the rotating rod, a tooth groove is provided on the left end of the outer tube, and a ring handle is fixedly connected to the left end of the pull rod.

[0008] Preferably, the driving device includes a motor, which is fixed to the inner wall of the base, and the output end of the motor is fixedly connected to a driving shaft, a pulley 1 is fixedly sleeved on the surface of the right half of the driving shaft, and a pulley 2 is fixedly connected to the right end of the rotating tube, and the surfaces of pulleys 1 and 2 are sleeved with the same belt, and the right end of the driving shaft is fixedly connected to a driving wheel, and the driving wheel is meshedly connected to an auxiliary wheel, and the auxiliary wheel is meshedly connected to a transmission wheel, and the right end of the auxiliary wheel is rotatably connected to a support rod, and the support rod is fixedly connected to the inner wall of the base.

[0009] Preferably, the outer cylinder is tapered, the left end of the outer cylinder is larger than the right end, the interior of the inner cylinder is composed of two parts, the inner left half of the inner cylinder is a tapered tube, the left end of the tapered tube is the largest, and the right end of the tapered tube is the smallest, the diameter of the outer cylinder is gradually reduced from left to right, the left end of the gradually expanding tube is the smallest, and the right end of the gradually expanding tube is the largest, the outer spiral blades and the inner spiral blades are both variable pitch settings, the left blade spacing of the outer spiral blades is the largest, the right blade spacing of the outer spiral blades is the smallest, the right blade spacing of the inner spiral blades is the largest, and the left blade spacing of the inner spiral blades is the smallest, the right end of the inner cylinder penetrates the inner wall of the outer cylinder and the right half of the barrel and extends to the outside of the barrel, the lower end of the lower hopper penetrates the inner wall of the placement port, the placement groove and the discharge port and extends to the inside of the inner cylinder, and the lower end of the lower hopper is flush with the inner wall of the inner cylinder.

[0010] Preferably, the circular plate is slidably connected to the upper end of the arc block, the spheres are matched with the size of each limiting hole, and each of the sliders is slidably connected to the inner wall of the adjacent arc groove.

[0011] Preferably, the left end of the rotating rod passes through the large gear and the right end of the disc and extends to the left side of the disc, the large gear is fixedly connected to the surface of the rotating rod, the disc is rotatably connected to the surface of the rotating rod, the left end of the pull rod passes through the inner wall of the left half of the barrel and extends to the outside of the barrel, the right half of the pull rod is arranged inside the rotating rod, each of the trapezoidal blocks passes through the inner wall of the corresponding rectangular hole and extends to the outside of the rotating rod, and each of the trapezoidal blocks matches the tooth groove.

[0012] The present invention provides a plastic granulator utilizing recycled plastics through improvement, which has the following improvements and advantages compared with the prior art: First, the present invention realizes the pressurization and deceleration retention of plastic raw materials through the gradual contraction and expansion design of the outer cylinder and the inner cylinder, and the variable pitch structure of the outer spiral blades and the inner spiral blades. The gradual contraction design of the outer cylinder with larger size on the left and smaller size on the right, combined with the variable pitch of the outer spiral blades with sparse size on the left and dense size on the right, gradually increases the pressurization of the material during the right movement, thereby improving the melting efficiency. The synergistic effect of the tapered tube on the left half of the inner cylinder and the reverse variable pitch of the inner spiral blades forms a retention and shear strengthening zone, prolongs the heating time, and promotes the full melting of the plastic.

[0013] Second: The present invention realizes the reciprocating motion of the magnetic disk in the molten plastic through the ingenious cooperation of the magnetic disk and the permanent magnetic ring. The threaded tube and the threaded rod are connected by a reciprocating threaded transmission, so that the threaded rod can drive the magnetic disk to shuttle in the molten plastic when rotating, so as to cut and extrude the molten plastic. At the same time, the interaction between the permanent magnetic ring and the magnetic disk generates periodic magnetic attraction and repulsion, which further drives the threaded rod to generate axial reciprocating motion while rotating, thereby promoting the extrusion and mixing uniformity of the molten plastic.

[0014] Thirdly, the present invention effectively prevents the blockage of the extrusion molding equipment through the design of the anti-blocking device. After the molten plastic in the barrel is exhausted, the motor is turned off, and the trapezoidal block is disengaged from the tooth groove by moving the pull rod. The rotation of the rotating rod no longer drives the outer barrel. When the motor is turned on again, the rotating rod drives the large gear to rotate, and the small gear drives the threaded tube to rotate. The threaded rod moves axially due to the limit, enters the diversion hole to extrude the remaining plastic, effectively clears the anti-blocking porous block, and ensures the subsequent normal operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further explained below in conjunction with the accompanying drawings and embodiments: Figure 1 The main structure of the present invention is shown in FIG. Figure 1 ; Figure 2 The main structure of the present invention is shown in FIG. Figure 2 ; Figure 3 It is a schematic diagram of the structure of the driving device of the present invention; Figure 4 It is a schematic diagram of the internal structure of the barrel of the present invention; Figure 5 It is a schematic diagram of the outer cylinder structure of the present invention; Figure 6 It is a schematic diagram of the cross-sectional structure of the inner tube of the present invention; Figure 7 It is a schematic diagram of the separation structure of the outer cylinder and the inner cylinder of the present invention; Figure 8 is a schematic diagram of the gear ring structure of the present invention; Fig. 9 It is a schematic diagram of the arc block structure of the present invention; Fig.10 It is a structural schematic diagram of a chute of the present invention; Fig.11 It is a schematic diagram of the tooth groove structure of the present invention; Fig.12 for Fig.10 The enlarged structural diagram at A in the middle; Fig.13 It is a schematic diagram of the circular through hole structure of the present invention.

[0016] Description of reference numerals: 1. Base; 2. Legs; 3. Cannon barrel; 4. Placement port; 5. Feed hopper; 6. Outer cylinder; 7. Outer spiral blade; 8. Arc-shaped port 1; 9. Inner cylinder; 10. Feeding port; 11. Rotating rod; 12. Inner spiral blade; 13. Heating coil; 14. Arc-shaped port 2; 15. Porous block; 16. Diverter hole; 17. Placement slot; 18. Round plate; 19. Arc-shaped slot; 20. Round slot; 21. Spring 1; 22. Ball; 23. Arc-shaped block; 24. Limiting hole; 25. Gear ring; 26. Slider; 27. Pointer; 28. Scale block; 29. ​​Slide 1; 30. Slide 2; 31. Slide 3; 32. Mold block 1; 33. Small cylinder 1; 34. Mold plate 1; 35. Limiting slot 1; 36. Mold block 2; 37. Small cylinder 2; 38. Mold plate 2 ;39. Limiting groove two;40. Mold block three;41. Small cylinder three;42. Mold disk three;43. Limiting groove three;44. Fan gear;45. Fixed disk;46. Rotating tube;47. Cutter head;48. Outer cover;49. Cooling tube;50. Discharge tube;51. Ring;52. Disc;53. Threaded tube;54. Threaded rod;55. Magnetic disk;56. Small gear;57. Large gear;58. Permanent magnet ring;59. Pull rod;60. Rectangular groove;61. Spring two;62. Trapezoidal block;63. Rectangular hole;64. Tooth groove;65. Ring handle;66. Motor;67. Drive shaft;68. Pulley one;69. Pulley two;70. Belt;71. Drive wheel;72. Auxiliary wheel;73. Transmission wheel;74. Support rod;75. Circular through hole. DETAILED DESCRIPTION

[0017] The present invention is described in detail below, and the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] The present invention provides a plastic granulator utilizing recycled plastics through improvement. The technical solution of the present invention is: like Figure 1 - Fig.13As shown, a plastic granulator using recycled plastics comprises a base 1, the inner wall of the base 1 is fixedly connected with two symmetrically arranged legs 2, the base 1 and the legs 2 constitute a supporting device of the whole device, the inner walls of the two legs 2 are fixedly connected with a same barrel 3, the inner wall of the barrel 3 is provided with a placement opening 4, the inner wall of the placement opening 4 is fixedly connected with a lower hopper 5, the inner wall of the left half of the barrel 3 is fixedly connected with two symmetrically arranged circular rings 51, the two circular rings 51 constitute an annular track, the inner wall of the annular track is rotatably connected with a disc 52, the left end of the disc 52 is provided with a plurality of symmetrically arranged circular through holes 75, a plasticizing device for facilitating plastic melting is arranged in the barrel 3, an extrusion molding device suitable for different specifications is arranged at the right end of the barrel 3, an anti-blocking device for preventing the extrusion molding device from being blocked is arranged in the barrel 3, and a driving device is arranged on the base 1.

[0019] Furthermore, the plasticizing device includes an outer cylinder 6, which is arranged in the barrel 3, and the surface of the outer cylinder 6 is fixedly connected with an outer spiral blade 7, and the surface of the outer cylinder 6 is provided with an arc-shaped opening 8. The inner wall of the outer cylinder 6 is rotatably connected with the inner cylinder 9, and the surface of the inner cylinder 9 is provided with a discharge opening 10. A rotating rod 11 is arranged in the inner cylinder 9, and the surface of the rotating rod 11 is fixedly connected with an inner spiral blade 12. The surface of the inner cylinder 9 is sleeved with a heating coil 13, and the inner walls of the outer cylinder 6 and the inner cylinder 9 are provided with the same arc-shaped opening 14. The inner cylinder 9 receives the raw material through the discharge opening 10, and its internal conical tapered structure forms a velocity gradient with the gradually expanding tube, and cooperates with the variable pitch design of the inner spiral blade 12, that is, sparse on the right and dense on the left, forcing the material to slow down and retain during the left movement process, thereby extending the heating time. The outer cylinder 6 adopts a reverse tapered design, that is, large on the left and small on the right, and cooperates with the variable pitch structure of the outer spiral blade 7, which is sparse on the left and dense on the right, to secondary delay the right movement speed of the material, thereby forming a progressive melting process of "deceleration, retention, and secondary plasticization".

[0020] Further, the extrusion molding device includes a porous block 15, the porous block 15 is fixed to the inner wall of the barrel 3, the inner wall of the porous block 15 is rotatably connected to the right half surface of the outer cylinder 6, the inner wall of the porous block 15 is fixedly connected to the right half surface of the inner cylinder 9, the left end of the porous block 15 is provided with a plurality of symmetrically arranged diversion holes 16, the surface of the porous block 15 is provided with a placement groove 17, the right end of the porous block 15 is rotatably connected with a circular plate 18, the upper end of the circular plate 18 is provided with a plurality of groups of symmetrically arranged circular holes, the size of each circular hole is the same as the size of the diversion hole 16, the surface of the circular plate 18 is provided with two symmetrically arranged arc grooves 19, the left end of the circular plate 18 is provided with a circular groove 20, and the inner wall of the circular groove 20 is fixedly connected There is a spring 21, the left end of the spring 21 is fixedly connected with a ball 22, the surface of the porous block 15 is fixedly connected with an arc block 23, the right end of the arc block 23 is provided with three symmetrically arranged limiting holes 24, the right end of the circular plate 18 is rotatably connected with a gear ring 25, the surface of the gear ring 25 is fixedly connected with two symmetrically arranged sliders 26, each slider 26 is slidably connected to the inner wall of the corresponding arc groove 19, the side wall of each slider 26 is fixedly connected with a pointer 27, the surface of the porous block 15 is fixedly connected with a scale block 28, the upper end of the circular plate 18 is provided with a plurality of symmetrically arranged slide grooves 1 29, the upper end of the circular plate 18 is provided with a plurality of symmetrically arranged slide grooves 2 30, and the upper end of the circular plate 18 is provided with a plurality of A symmetrically arranged slide groove 31, the inner wall of each slide groove 29 is slidably connected to a group of symmetrically arranged mold blocks 32, the upper surface of each mold block 32 is fixedly connected to a small cylinder 33, a mold plate 34 is arranged above each group of mold blocks 32, the lower end of each mold plate 34 is against the upper surface of the corresponding mold block 32, and the upper end of each mold plate 34 is provided with a plurality of symmetrically arranged limiting grooves 35, each limiting groove 35 is slidably connected to the surface of the corresponding small cylinder 33, the inner wall of each slide groove 2 30 is slidably connected to a group of symmetrically arranged mold blocks 2 36, the upper end of each mold block 2 36 is fixedly connected to a small cylinder 2 37, and each group of mold blocks 2 A mold plate 2 38 is arranged above each mold plate 36, and the lower end of each mold plate 2 38 is against the upper end of the corresponding mold block 2 36, and a plurality of symmetrically arranged limiting grooves 2 39 are opened at the upper end of each mold plate 2 38, and each limiting groove 2 39 is slidably connected to the surface of the corresponding small cylinder 2 37, and a group of symmetrically arranged mold blocks 3 40 are slidably connected to the inner wall of each slide groove 31, and a small cylinder 3 41 is fixedly connected to the upper end of each mold block 3 40, and a mold plate 3 42 is arranged above each group of mold blocks 3 40, and the lower end of each mold plate 3 42 is against the upper end of the corresponding mold block 3 40, and a plurality of symmetrically arranged limiting grooves 3 43 are opened at the upper end of each mold plate 3 42, and each limiting groove 3 43 is slidably connected to the surface of the corresponding small cylinder 3 41, and a fan gear 44 is fixedly connected to the surface of each mold plate 1 34, mold plate 2 38 and mold plate 3 42.Each sector gear 44 is meshed with the gear ring 25. The right end of the barrel 3 is fixedly connected to a fixed plate 45. The right end of the fixed plate 45 is provided with a plurality of symmetrically arranged small holes, each of which is on a horizontal line with the corresponding diversion hole 16. The right end of the inner cylinder 9 is rotatably connected to a rotating tube 46. The right end of the rotating rod 11 penetrates the inner wall of the rotating tube 46 and extends to the outside of the rotating tube 46. A cutter head 47 is fixedly connected to the surface of the rotating tube 46. The cutter head 47 abuts against the right end of the fixed plate 45. The right end of the fixed plate 45 The end is fixedly connected with an outer cover 48, the surface of the outer cover 48 is sleeved with a cooling pipe 49, and the surface of the outer cover 48 is connected with a discharge pipe 50. The porous block 15 serves as the melt distribution center, and evenly distributes the molten plastic to different molding channels through the symmetrically distributed diversion holes 16. The diversion holes 16 are precisely aligned with the small holes of the fixed plate 45 to form a stable laminar extrusion path. The gear ring 25 is engaged with the fan gear 44 to drive the mold plate to rotate, drive the mold blocks to move along their respective slide grooves, and quickly switch the mold group through the rotation of the circular plate 18.

[0021] Furthermore, the anti-blocking device includes a plurality of symmetrically arranged threaded tubes 53, each of which is rotatably connected to the right end of the disc 52, a threaded rod 54 is arranged on the inner wall of each threaded tube 53, the left end of each threaded rod 54 penetrates the inner wall of the corresponding circular through hole 75 and extends to the left side of the disc 52, the inner wall of each circular through hole 75 is fixedly connected to two symmetrically arranged strip plates, the surface of each threaded rod 54 is provided with two symmetrically arranged strip grooves, the strip plates of each circular through hole 75 match the strip grooves of the corresponding threaded rod 54, the right end of each threaded rod 54 penetrates the left end of the outer spiral blade 7 and extends to the right side of the outer spiral blade 7, each threaded rod 54 matches the size of the diversion hole 16, and each threaded rod 54 They are all connected to the corresponding threaded tube 53 through reciprocating threads, and the surface of each threaded rod 54 is sleeved with a plurality of symmetrically arranged magnetic disks 55. Each threaded rod 54 is connected to the corresponding magnetic disk 55 through reciprocating threads. A small gear 56 is fixedly connected to the surface of each threaded tube 53, and each small gear 56 is meshed with the same large gear 57. The inner wall of the barrel 3 is provided with a plurality of parallel annular grooves, and the inner wall of each annular groove is fixedly connected with a permanent magnet ring 58. The inner wall of each permanent magnet ring 58 is flush with the inner wall of the barrel 3. A pull rod 59 is provided in the barrel 3, and a plurality of symmetrically arranged rectangular grooves 60 are provided on the right half surface of the pull rod 59. The inner wall of each rectangular groove 60 is fixedly connected with a spring 2 61, and each spring 2 61 is far One end of the pull rod 59 is fixedly connected with a trapezoidal block 62, a plurality of symmetrically arranged rectangular holes 63 are provided on the surface of the rotating rod 11, a tooth groove 64 is provided on the left end of the outer cylinder 6, and a ring handle 65 is fixedly connected to the left end of the pull rod 59. The threaded tube 53 and the threaded rod 54 are connected by a reciprocating thread transmission, so that the threaded rod 54 can reciprocate along the axial direction under the rotation drive of the threaded tube 53. This reciprocating motion enables the magnetic disk 55 sleeved on the surface of the threaded rod 54 to shuttle in the molten plastic, cut and extrude the molten plastic, help to better melt the plastic, and promote the molten plastic to pass through the diversion hole 16. The strip plate in the circular through hole 75 and the strip groove provided on the threaded rod 54 are used to limit the rotational movement of the threaded rod 54 so that it can only move The axial movement ensures that the threaded rod 54 can stably perform reciprocating linear motion without rotation under the drive of the threaded tube 53, thereby ensuring that the magnetic disk 55 can shuttle in the molten plastic according to a predetermined trajectory. By setting the mutual meshing of the small gear 56 and the large gear 57, when the large gear 57 rotates, it can drive all the small gears 56 to rotate synchronously, and then drive all the threaded tubes 53 and the threaded rods 54 to move synchronously, so that multiple threaded rods 54 can reciprocate simultaneously and synchronously. By setting the permanent magnet ring 58 and the magnetic disk 55, when the threaded rod 54 rotates, the magnetic disk 55 rotates with the shaft through the magnetic field of the permanent magnet ring 58, and the alternating magnetic poles generate periodic magnetic attraction and repulsion, driving the threaded rod 54 to generate axial reciprocating motion while rotating.

[0022] Furthermore, the driving device includes a motor 66, which is fixed to the inner wall of the base 1. The output end of the motor 66 is fixedly connected to a driving shaft 67. A pulley 1 68 is fixedly sleeved on the surface of the right half of the driving shaft 67. The right end of the rotating tube 46 is fixedly connected to a pulley 2 69. The surfaces of the pulleys 1 68 and 69 are sleeved with the same belt 70. The right end of the driving shaft 67 is fixedly connected to a driving wheel 71, and the driving wheel 71 is meshedly connected to an auxiliary wheel 72, and the auxiliary wheel 72 is meshedly connected to a transmission wheel 73. The right end of the auxiliary wheel 72 is rotatably connected to a support rod 74, and the support rod 74 is fixedly connected to the inner wall of the base 1. The fixed installation of the motor 66 ensures the stability of the power output. In addition, the state of the motor 66 is the same each time it is turned on and off. This design ensures that the threaded rod 54 is on the same horizontal line with the diversion hole 16 each time it is started.

[0023] Furthermore, the outer cylinder 6 is tapered, and the diameter of the outer cylinder 6 is gradually reduced from left to right. The interior of the inner cylinder 9 is composed of two parts. The left half of the inner cylinder 9 is a tapered tube, the left end of the tapered tube is the largest, and the right end of the tapered tube is the smallest. The right half of the inner cylinder 9 is a gradually expanding tube, the left end of the gradually expanding tube is the smallest, and the right end of the gradually expanding tube is the largest. The outer spiral blade 7 and the inner spiral blade 12 are both variable pitch settings, the left blade spacing of the outer spiral blade 7 is the largest, and the right blade spacing of the outer spiral blade 7 is the smallest, the right blade spacing of the inner spiral blade 12 is the largest, and the left blade spacing of the inner spiral blade 12 is the smallest. The right end of the inner cylinder 9 passes through the outer cylinder 6 and the inner wall of the right half of the barrel 3 and extends to the outside of the barrel 3. The lower end of the hopper 5 passes through the inner walls of the placement port 4, the placement groove 17 and the discharge port 10 and extends to the interior of the inner cylinder 9. The lower end of the discharge hopper 5 is flush with the inner wall of the inner cylinder 9. The outer cylinder 6 is designed to be larger on the left and smaller on the right to form a compression flow field. The variable pitch of the outer spiral blade 7 is sparse on the left and dense on the right, so that the material is gradually pressurized during the right movement, and the melting efficiency is improved. The left-large and right-small conical tube of the left half of the inner cylinder 9 and the reverse variable pitch of the inner spiral blade 12 are sparse on the right and dense on the left work together to form a retention and shear strengthening zone, which prolongs the heating time of the material. The expansion flow field design of the right half of the inner cylinder 9 with a gradually expanding tube smaller on the left and larger on the right causes the melt to produce a turbulent effect during the expansion process. The increasing pitch of the inner spiral blade 12 is combined to achieve full stretching of the melt molecular chain and improve mixing uniformity.

[0024] Furthermore, the circular plate 18 is slidably connected to the upper end of the arc block 23, the ball 22 matches the size of each limiting hole 24, each slider 26 is slidably connected to the inner wall of the adjacent arc groove 19, and the matching of the ball 22 and the three limiting holes 24 constitutes a mechanical encoder, and each hole position corresponds to a mold set.

[0025] Furthermore, the left end of the rotating rod 11 passes through the large gear 57 and the right end of the disk 52 and extends to the left side of the disk 52. The large gear 57 is fixedly connected to the surface of the rotating rod 11, and the disk 52 is rotatably connected to the surface of the rotating rod 11. The left end of the pull rod 59 passes through the inner wall of the left half of the barrel 3 and extends to the outside of the barrel 3. The right half of the pull rod 59 is arranged inside the rotating rod 11. Each trapezoidal block 62 passes through the inner wall of the corresponding rectangular hole 63 and extends to the outside of the rotating rod 11. Each trapezoidal block 62 matches the tooth groove 64. The pull rod 59 cooperates with the trapezoidal block 62 and the spring 61. When the pull rod 59 moves, the trapezoidal block 62 can extend or retract into the rectangular groove 60 through the elastic force of the spring 61. This cooperation enables the trapezoidal block 62 to flexibly engage or disengage with the tooth groove 64 according to the position change of the pull rod 59.

[0026] Working principle: When in use, first adjust according to the shape and size of the required plastic particles. There are three groups of holes of different shapes on the circular plate 18. Rotate the circular plate 18 to align the required shape holes with the diversion holes 16. When the circular plate 18 is rotated, the ball 22 squeezes the spring 1 21 due to the rotation of the circular plate 18, so that the spring 1 21 is subjected to force, driving the ball 22 to enter the circular groove 20. When the circular plate 18 is rotated until the ball 22 moves to the required limiting hole 24, the ball 22 enters the limiting hole 24, and the spring 1 21 supports the limiting hole 24 due to the elastic force, thereby limiting the circular plate 18. At this point, the circular plate 18 is adjusted, and the gear ring 25 is rotated for adjustment. The gear ring 25 drives the mold plate 1 34, the mold plate 2 38 and the mold plate 34 through meshing with the fan gear 44. The mold plate 34 rotates together with the mold block 32. Since the small cylinder 33 is in the limiting groove 35, when the mold plate 34 rotates, the limiting groove 35 drives the mold block 32 to make an arc movement, and the sliding connection between the mold block 32 and the slide groove 29 makes the mold block 32 move along the slide groove 29. The movement of the mold block 32 forms rectangles of different sizes within a certain range. The size of the aperture adjustment can be known through the indication of the pointer 27. Similarly, the rotation of the mold plate 28 makes the mold block 26 move in the slide groove 20 through the action of the limiting groove 29 and the small cylinder 27. Each group of mold blocks 26 forms hexagons of different sizes by moving, and the mold block 340 forms dodecagons of different sizes by moving. However, it should be noted that only a certain One group of holes can pass through the molten plastic, because the rotation of the circular plate 18 makes only a certain group of circular holes form a channel with the placement groove 17. After the adjustment is completed, the motor 66 is started, and the motor 66 rotates the driving wheel 71 through the driving shaft 67. The driving wheel 71 is engaged with the auxiliary wheel 72, and then the auxiliary wheel 72 is engaged with the transmission wheel 73 to rotate the transmission wheel 73. The transmission wheel 73 drives the rotating rod 11 to rotate, and the trapezoidal block 62 passes through the rectangular hole 63 and is engaged with the tooth groove 64, so that when the rotating rod 11 rotates, it will drive the outer cylinder 6 to rotate together. Then, the pre-treated recycled plastic is put into the lower hopper 5. Through the action of gravity, the plastic enters the inner cylinder 9. The rotation of the rotating rod 11 drives the inner spiral blade 12 to rotate together. The rotation of the inner spiral blade 12 continuously moves the plastic. The plastic is transported to the left side, and the left side of the rotating rod 11 is smaller than the right side, and the spacing of the inner spiral blades 12 changes, so that the movement speed of the plastic into the inner cylinder 9 slows down, so that it has enough time to be melted by the heating coil 13. When the molten plastic enters the tapered tube at the left end of the inner cylinder 9, the molten plastic will stay inside due to the sudden enlargement of the leftmost end of the tapered tube. When the outer cylinder 6 rotates, when the arc-shaped opening 2 14 or the arc-shaped opening 1 8 of the outer cylinder 6 is connected with the arc-shaped opening of the inner cylinder 9, the molten plastic will leave the tapered tube and enter the outer cylinder 6. Similarly, the outer cylinder 6 is larger on the left and smaller on the right, and the spacing of the outer spiral blades 7 is getting smaller and smaller, so that the molten plastic slows down when moving to the right, so that it can be more fully melted by the heating coil 13. The motor 66 drives the outer spiral blades 7 to rotate at the same time.The threaded rod 54 is also driven to move together. The threaded rod 54 rotates with the rotating rod 11 as the center. Since the rotating rod 11 is fixedly connected to the large gear 57, the small gear 56 fixedly connected to the threaded tube 53 is meshed with the large gear 57. Therefore, the small gear 56 and the large gear 57 rotate together and are relatively stationary. The rotation of the threaded rod 54 causes the disk 52 to rotate in the ring 51 with the pull rod 59 as the center. When the threaded rod 54 rotates, it drives the magnetic disk 55 to rotate with the rotating rod 11 as the center. When the magnetic disk 55 rotates, due to the suction force of the permanent magnet ring 58, each magnetic disk 55 rotates on the surface of the threaded rod 54. Due to the action of the reciprocating thread, the magnetic disk 55 reciprocates between the blades of each section of the outer spiral blade 7. The magnetic disk 55 reciprocates through this reciprocating The magnetic disk 55 moves to the right, extruding the molten plastic, and causes the molten plastic to pass through the diverter hole 16 better. The magnetic disk 55 moves to the left, extruding the molten plastic, and causing the molten plastic to move to the right. After being conveyed and extruded, the molten plastic enters the diverter hole 16, and comes out from the small hole of the fixed disk 45, and is cut by the rotating cutter head 47. The cutter head 47 transmits the power of the motor 66 to the rotating tube 46 through the pulley 1 68, the pulley 2 69 and the belt 70. The rotating tube 46 drives the cutter head 47 to rotate, and the cut plastic particles are cooled into particles by the cooling tube 49, and are thrown out due to the centrifugal force. The molten plastic in the cover 48 goes out through the discharge pipe 50. When all the molten plastic in the barrel 3 is squeezed out, the small hole of the fixed disk 45 will not continue to squeeze out the molten plastic, and the motor 66 is turned off. The pull rod 59 is moved through the annular handle 65 to move the pull rod 59 to the left, and the pull rod 59 drives the trapezoidal block 62 to move to the left together. The left inclined surface of the trapezoidal block 62 abuts against the rectangular hole 63, so that the trapezoidal block 62 applies a force to the spring 2 61. The spring 2 61 is shortened by the force, so that the trapezoidal block 62 moves through the rectangular hole 63 to the rotating rod 11. The pull rod 59 smoothly drives the trapezoidal block 62 to disengage from the tooth groove 64. At this time, the rotation of the rotating rod 11 will not drive the outer cylinder 6 to rotate together. When the motor 66 is turned off, the rotation angle of the rotating rod 11 is the same as the initial state, that is, the thread The rod 54 is still in the original position and on the same horizontal line as the corresponding diversion hole 16. When the motor 66 is turned on, the rotating rod 11 rotates to drive the large gear 57 to rotate. At this time, because the outer cylinder 6 does not move, the threaded rod 54 will not rotate with the rotating rod 11 as the center of the circle. The large gear 57 rotates to make the small gear 56 rotate with the threaded tube 53 as the center of the circle. The small gear 56 drives the threaded tube 53 to rotate. Due to the limiting effect, the threaded rod 54 will not rotate with the threaded tube 53, but will move axially and enter the diversion hole 16, squeeze the remaining molten plastic in the diversion hole 16 out of the small hole of the fixed disk 45, and then reset to the original position. Through the above steps, the plastic granulator can efficiently process the recycled plastic into plastic particles of the required shape and size.

[0027] The above description enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A plastic granulator using recycled plastics, comprising a base (1), characterized in that: The inner wall of the base (1) is fixedly connected to two symmetrically arranged legs (2), and the base (1) and the legs (2) constitute a supporting device for the entire device. The inner walls of the two legs (2) are fixedly connected to the same barrel (3), and a placement opening (4) is provided on the inner wall of the placement opening (4), and a lower hopper (5) is fixedly connected to the inner wall of the left half of the barrel (3). Two symmetrically arranged circular rings (51) are fixedly connected to the inner wall of the left half of the barrel (3), and the two circular rings (51) constitute an annular track. A disc (52) is rotatably connected to the inner wall of the annular track, and a plurality of symmetrically arranged circular through holes (75) are provided at the left end of the disc (52). A plasticizing device for facilitating plastic melting is provided in the barrel (3), and an extrusion molding device suitable for different specifications is provided at the right end of the barrel (3). An anti-blocking device for preventing the extrusion molding device from being blocked is provided in the barrel (3), and a driving device is provided on the base (1).

2. A plastic granulator utilizing recycled plastic according to claim 1, characterized in that: The plasticizing device comprises an outer cylinder (6), the outer cylinder (6) being arranged in a barrel (3), an outer spiral blade (7) being fixedly connected to the surface of the outer cylinder (6), an arc-shaped opening (8) being provided on the surface of the outer cylinder (6), an inner cylinder (9) being rotatably connected to the inner wall of the outer cylinder (6), a material discharge opening (10) being provided on the surface of the inner cylinder (9), a rotating rod (11) being arranged in the inner cylinder (9), an inner spiral blade (12) being fixedly connected to the surface of the rotating rod (11), a heating coil (13) being sleeved on the surface of the inner cylinder (9), and the inner walls of the outer cylinder (6) and the inner cylinder (9) being provided with the same arc-shaped opening (14).

3. A plastic granulator utilizing recycled plastic according to claim 1, characterized in that: The extrusion molding device comprises a porous block (15), wherein the porous block (15) is fixed to the inner wall of the barrel (3), the inner wall of the porous block (15) is rotatably connected to the right half surface of the outer barrel (6), the inner wall of the porous block (15) is fixedly connected to the right half surface of the inner barrel (9), the left end of the porous block (15) is provided with a plurality of symmetrically arranged flow diversion holes (16), the surface of the porous block (15) is provided with a placement groove (17), the right end of the porous block (15) is rotatably connected to a circular plate (18), the upper end of the circular plate (18) is provided with a plurality of groups of symmetrically arranged circular holes, the size of each of the circular holes is the same as the size of the flow diversion hole (16), and the surface of the circular plate (18) is provided with two symmetrically arranged arc grooves ( 19), a circular groove (20) is provided at the left end of the circular plate (18), a spring (21) is fixedly connected to the inner wall of the circular groove (20), a round ball (22) is fixedly connected to the left end of the spring (21), an arc block (23) is fixedly connected to the surface of the porous block (15), three symmetrically arranged limiting holes (24) are provided at the right end of the arc block (23), a gear ring (25) is rotatably connected to the right end of the circular plate (18), two symmetrically arranged sliders (26) are fixedly connected to the surface of the gear ring (25), each of the sliders (26) is slidably connected to the inner wall of the corresponding arc groove (19), and a pointer (27) is fixedly connected to the side wall of each of the sliders (26), and the porous block (15) is fixedly connected to the inner wall of the corresponding arc groove (19). The surface of the circular plate (18) is fixedly connected with a scale block (28), the upper end of the circular plate (18) is provided with a plurality of symmetrically arranged slide grooves (29), the upper end of the circular plate (18) is provided with a plurality of symmetrically arranged slide grooves (30), the upper end of the circular plate (18) is provided with a plurality of symmetrically arranged slide grooves (31), the inner wall of each of the slide grooves (29) is slidably connected with a group of symmetrically arranged mold blocks (32), the upper surface of each of the mold blocks (32) is fixedly connected with a small cylinder (33), a mold plate (34) is provided above each group of the mold blocks (32), the lower end of each of the mold plates (34) is abutted against the upper surface of the corresponding mold block (32), and the upper surface of each of the mold plates (34) is fixedly connected with a small cylinder (33), and a mold plate (34) is provided above each group of the mold blocks (32). A plurality of symmetrically arranged limiting grooves (35) are provided at the ends thereof, each of the limiting grooves (35) being slidably connected to the surface of the corresponding small cylinder (33); the inner wall of each of the sliding grooves (30) is slidably connected to a group of symmetrically arranged mold blocks (36); the upper end of each of the mold blocks (36) is fixedly connected to a small cylinder (37); a mold plate (38) is provided above each group of the mold blocks (36); the lower end of each of the mold plates (38) is abutted against the upper end of the corresponding mold block (36); the upper end of each of the mold plates (38) is provided with a plurality of symmetrically arranged limiting grooves (39); each of the limiting grooves (39) is slidably connected to the surface of the corresponding small cylinder (37);The inner wall of each of the slide grooves (31) is slidably connected to a group of symmetrically arranged mold blocks (40), the upper end of each of the mold blocks (40) is fixedly connected to a small cylinder (41), a mold plate (42) is arranged above each group of mold blocks (40), the lower end of each of the mold plates (42) is abutted against the upper end of the corresponding mold block (40), and the upper end of each of the mold plates (42) is provided with a plurality of symmetrically arranged limit grooves (43), Each of the limiting grooves (43) is slidably connected to the surface of the corresponding small cylinder (41); each of the surfaces of the mold plate (34), the mold plate (38) and the mold plate (42) is fixedly connected to a fan gear (44); each of the fan gears (44) is meshed with the gear ring (25); the right end of the barrel (3) is fixedly connected to a fixed plate (45); the right end of the fixed plate (45) is provided with a plurality of symmetrically arranged small holes; each of the small holes is on the same horizontal line as the corresponding diversion hole (16). The right end of the inner tube (9) is rotatably connected to a rotating tube (46), the right end of the rotating rod (11) penetrates the inner wall of the rotating tube (46) and extends to the outside of the rotating tube (46), a cutter head (47) is fixedly connected to the surface of the rotating tube (46), the cutter head (47) abuts against the right end of the fixed disk (45), the right end of the fixed disk (45) is fixedly connected to an outer cover (48), the surface of the outer cover (48) is sleeved with a cooling tube (49), and the surface of the outer cover (48) is connected to a discharge pipe (50).

4. A plastic granulator utilizing recycled plastics according to claim 1, characterized in that: The anti-blocking device comprises a plurality of symmetrically arranged threaded tubes (53), each of the threaded tubes (53) being rotatably connected to the right end of the disk (52), a threaded rod (54) being arranged on the inner wall of each of the threaded tubes (53), the left end of each of the threaded rods (54) passing through the inner wall of the corresponding circular through hole (75) and extending to the left side of the disk (52), the inner wall of each of the circular through holes (75) being fixedly connected to two symmetrically arranged strip plates, and the surface of each of the threaded rods (54) being provided with two symmetrically arranged The strip groove of each circular through hole (75) matches the strip groove of the corresponding threaded rod (54), the right end of each threaded rod (54) penetrates the left end of the outer spiral blade (7) and extends to the right side of the outer spiral blade (7), each threaded rod (54) matches the size of the diversion hole (16), each threaded rod (54) is transmission-connected to the corresponding threaded tube (53) through a reciprocating thread, and the surface of each threaded rod (54) is sleeved with a plurality of symmetrically arranged magnetic disks (55 ), each of the threaded rods (54) is transmission-connected to a corresponding magnetic disk (55) via a reciprocating thread, a small gear (56) is fixedly connected to the surface of each threaded tube (53), each of the small gears (56) is meshingly connected to the same large gear (57), a plurality of parallel annular grooves are provided on the inner wall of the barrel (3), a permanent magnetic ring (58) is fixedly connected to the inner wall of each annular groove, and the inner wall of each permanent magnetic ring (58) is flush with the inner wall of the barrel (3), and a A pull rod (59) is provided, and a plurality of symmetrically arranged rectangular grooves (60) are provided on the right half surface of the pull rod (59), and a spring 2 (61) is fixedly connected to the inner wall of each rectangular groove (60), and a trapezoidal block (62) is fixedly connected to the end of each spring 2 (61) away from the pull rod (59). A plurality of symmetrically arranged rectangular holes (63) are provided on the surface of the rotating rod (11), and a tooth groove (64) is provided on the left end of the outer cylinder (6), and a ring handle (65) is fixedly connected to the left end of the pull rod (59).

5. A plastic granulator utilizing recycled plastic according to claim 1, characterized in that: The driving device comprises a motor (66), wherein the motor (66) is fixed to the inner wall of the base (1), the output end of the motor (66) is fixedly connected to a driving shaft (67), the right half surface of the driving shaft (67) is fixedly sleeved with a pulley 1 (68), the right end of the rotating tube (46) is fixedly connected to a pulley 2 (69), the surfaces of the pulley 1 (68) and the pulley 2 (69) are sleeved with the same belt (70), the right end of the driving shaft (67) is fixedly connected to a driving wheel (71), the driving wheel (71) is meshedly connected to an auxiliary wheel (72), the auxiliary wheel (72) is meshedly connected to a transmission wheel (73), the right end of the auxiliary wheel (72) is rotatably connected to a support rod (74), and the support rod (74) is fixedly connected to the inner wall of the base (1).

6. A plastic granulator utilizing recycled plastics according to claim 2, characterized in that: The outer cylinder (6) is gradually reduced in diameter from left to right. The interior of the inner cylinder (9) is composed of two parts. The left half of the interior of the inner cylinder (9) is a tapered tube. The left end of the tapered tube has the largest size and the right end of the tapered tube has the smallest size. The right half of the interior of the inner cylinder (9) is a gradually expanding tube. The left end of the gradually expanding tube has the smallest size and the right end of the gradually expanding tube has the largest size. The outer spiral blade (7) and the inner spiral blade (12) are both variable pitch. The left blade of the outer spiral blade (7) has a variable pitch. The blade spacing is the largest, the blade spacing on the right side of the outer spiral blade (7) is the smallest, the blade spacing on the right side of the inner spiral blade (12) is the largest, and the blade spacing on the left side of the inner spiral blade (12) is the smallest, the right end of the inner tube (9) penetrates the outer tube (6) and the inner wall of the right half of the barrel (3) and extends to the outside of the barrel (3), the lower end of the lower hopper (5) penetrates the inner wall of the placement port (4), the placement groove (17) and the discharge port (10) and extends to the inside of the inner tube (9), and the lower end of the lower hopper (5) is flush with the inner wall of the inner tube (9).

7. A plastic granulator utilizing recycled plastics according to claim 3, characterized in that: The circular plate (18) is slidably connected to the upper end of the arc block (23), the spheres (22) are matched with the size of each limiting hole (24), and each slider (26) is slidably connected to the inner wall of an adjacent arc groove (19).

8. A plastic granulator utilizing recycled plastics according to claim 2 or 4, characterized in that: The left end of the rotating rod (11) passes through the large gear (57) and the right end of the disc (52) and extends to the left side of the disc (52); the large gear (57) is fixedly connected to the surface of the rotating rod (11); the disc (52) is rotatably connected to the surface of the rotating rod (11); the left end of the pull rod (59) passes through the inner wall of the left half of the barrel (3) and extends to the outside of the barrel (3); the right half of the pull rod (59) is arranged inside the rotating rod (11); each of the trapezoidal blocks (62) passes through the inner wall of the corresponding rectangular hole (63) and extends to the outside of the rotating rod (11); each of the trapezoidal blocks (62) matches the tooth groove (64).

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