A plastic underwater pelletizer

Abstract

The present invention discloses a plastic underwater pelletizer, which relates to the technical field of plastic pellet processing, and solves the problems that the prior art does not have a corresponding monitoring structure to monitor this distance in real time, and it is difficult to monitor the inclination of the cutting plane. The plastic underwater pelletizer includes a bottom plate, and also includes a pelletizing mechanism, a driving component, a vertical supporting component, a first docking component, a second docking component and an anti-tilt detection component; in the present invention, when the moving pelletizing component moves, the first docking component will also move synchronously. Combining the first docking components at the front and rear ends of the moving pelletizing component with the second docking components at the front and rear ends of the second bearing frame respectively corresponding and cooperating, thereby realizing the accurate determination of the moving distance and orientation during the movement of the moving pelletizing component, ensuring the accuracy of the distance between the cutting point and the die head, so as to avoid the problem of the wire material appearing as slender strips and ensuring the quality of pellet production.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic pellet processing, and specifically to a plastic underwater pelletizer. Background Art

[0002] For the granulation of low-viscosity, high-elastic polymer materials or granulation with special requirements, an underwater pelletizer is usually used to cut the molten rubber and plastic materials extruded through a die head into particle state in flowing water.

[0003] The existing Chinese patent application with the publication number CN115897342A4 discloses a plastic underwater pelletizer, which includes a frame. A sliding seat is slidably connected to the frame. A shaft seat is provided on the sliding seat. A core shaft is rotatably connected in the shaft seat. One end of the core shaft is provided with a spline. A key sleeve is sleeved on the spline. A cutting knife is provided at the end of the key sleeve. A first fixing ring is provided on the key sleeve. A support plate for the core shaft to pass through is provided on the side wall of the shaft seat. A second fixing ring is rotatably connected to the side wall of the support plate through a rotating member. A spring is connected between the second fixing ring and the first fixing ring. A driving motor for driving the core shaft to rotate is installed at one end of the shaft seat away from the cutting knife. A driving member for driving the sliding seat to move is provided on the frame. A sealing cover is provided on the frame opposite to the cutting knife. A die head is provided in the sealing cover. A water inlet pipe, a water outlet pipe and a locking seal are provided on the sealing cover. This device has the effect of improving the quality of particle formation.

[0004] However, the plastic underwater pelletizer has the following defects in specific use:

[0005] 1. When the existing plastic underwater pelletizer is in use, the distance between the feeding roller (biting point) and the hob (cutting point) is called the pressing distance. In this span, the prior art does not have a corresponding monitoring structure to monitor this distance in real time. Once the distance between the two deviates, the plastic wire material will not be cut into the correct particle size. In the long term, it is likely to cause further deterioration of the cutting quality and finally lead to serious problems.

[0006] 2. When the existing plastic underwater pelletizer is in use, it is difficult to monitor the inclination of the cutting plane. If the cutting plane of the pelletizer is not parallel to the extrusion die of the extruder, the wire material will tend to crowd to the left or right, and then there will be a tendency for the wire material to bunch to one side on the feeding platform, that is, the wire material drift phenomenon. The wire material drift phenomenon will cause problems such as poor quality of the pellets, the existence of long and thin strips, and processing disorders. Therefore, it is urgent to improve it. Summary of the Invention

[0007] The purpose of the present invention is to provide a plastic underwater pelletizer to solve the problems raised in the above background art.

[0008] To achieve the above invention purpose, the present invention adopts the following technical solutions:

[0009] A plastic underwater pelletizer provided by the present invention includes a bottom plate, and a first carrier is arranged on the top of the bottom plate. A second carrier is fixed on the top of the first carrier, and further includes:

[0010] A pelletizing mechanism, which includes a moving pelletizing component arranged on the top of the second carrier and a fixed pelletizing component arranged on the top of the second carrier. The moving pelletizing component is located on one side of the fixed pelletizing component;

[0011] A driving component, which is arranged on the top of the first carrier and is used to drive the moving pelletizing component to move along the length direction of the first carrier, so that the moving pelletizing component approaches or moves away from the fixed pelletizing component;

[0012] A vertical support component, which is arranged on one side of the first carrier and at least includes two interconnected gantry frames. The shapes of the two gantry frames are both L-shaped structures;

[0013] A first docking component, and the number of the first docking components is at least two and they are symmetrically arranged on the front and back sides of the moving pelletizing component;

[0014] A second docking component, and the number of the second docking components is at least two and they are arranged on the front and back sides of the second carrier. The two second docking components and the two first docking components are in one-to-one correspondence and alignment; and

[0015] An anti-tilt detection component, which is arranged above the first docking component.

[0016] Preferably, the moving pelletizing component includes:

[0017] A first motor, a rotating shaft, a cutting hob and a first enclosure,

[0018] Wherein, the rotating shaft is connected to the output end of the first motor, the cutting hob is arranged at one end of the rotating shaft away from the output end of the first motor, the first enclosure is fixed on the side of the first motor facing the rotating shaft, and the first enclosure is located outside the rotating shaft.

[0019] Preferably, the fixed pelletizing component includes:

[0020] A screen changer, a start-up valve, a die head, a second enclosure, a water inlet pipe and a water return pipe,

[0021] Among them, the screen changer is arranged on the top of the second carrier, the start-up valve is arranged on one side of the screen changer facing the moving pelletizing assembly, the die head is arranged on one side of the start-up valve facing the moving pelletizing assembly, the second closed cover is arranged on one side of the die head facing the moving pelletizing assembly, the water inlet pipe is arranged at the lower end of the second closed cover, the water return pipe is arranged at the upper end of the second closed cover, and,

[0022] The first closed cover and the second closed cover correspond to and align with each other. The outside of the first closed cover and the second closed cover is docked and sealed through a locking structure. After the first closed cover and the second closed cover are docked and sealed, a cutting chamber is formed inside the two.

[0023] Preferably, the fixed pelletizing assembly further includes:

[0024] A hydraulic system, a cooling system and a recovery system,

[0025] Among them, the hydraulic system is arranged on the top of the bottom plate or on the vertical support assembly, and the hydraulic system is connected to the end of the water inlet pipe. The cooling system and the recovery system are arranged on the top of the bottom plate.

[0026] Preferably, the driving assembly includes:

[0027] A support plate, a second motor, a threaded rod, a moving block, a guide block and a guide bar,

[0028] Among them, the number of the support plates is two and they are fixed on the top of the first carrier. The second motor is installed on the side of one of the support plates. The threaded rod is rotatably connected between the two support plates, and one end of the threaded rod is connected to the output end of the second motor. The moving block is arranged outside the threaded rod and is threadedly connected to the threaded rod. The top ends of the moving block and the guide block are both fixed to the bottom of the first motor. The guide bar is arranged on the top of the second carrier, and the guide block is slidably connected to the guide bar.

[0029] Preferably, the vertical support assembly further includes:

[0030] A mounting plate, a fixing plate, a support rod and a display control unit,

[0031] Among them, the mounting plate is arranged on the gantry, and a number of mounting holes are equidistantly formed on the mounting plate. The fixing plate is mounted on the mounting plate through the mounting holes. The support rod is arranged at one end of the fixing plate facing the pelletizing mechanism. The display control unit is arranged at the bottom of the support rod.

[0032] Preferably, insertion rods are fixed to both the front and rear ends of the first carrier. Slots are provided at the bottom of the gantry for inserting the insertion rods, and clamping plates are fixed and clamping grooves are provided between the opposite ends of the two gantries. The clamping plate on one gantry is clamped with the clamping groove on the other gantry.

[0033] Preferably, both the first docking component and the second docking component include:

[0034] a connecting plate, a support plate, a fixed box, a first piston, a second piston, a locking and unlocking component, a first connecting block, a cover plate, a high-precision distance measuring sensor, and a second connecting block.

[0035] Among them, the support plate is fixed to the bottom of the connecting plate, the fixed box is fixed to the top of the support plate, and a first chamber, a second chamber, and a communication hole for connecting the two are provided inside the fixed box. The first piston and the locking and unlocking component are both arranged inside the first chamber, the second piston is arranged inside the second chamber, the second connecting block is arranged on the top of the first piston, the first connecting block is arranged on the top of the second piston, and a groove is provided on the side of the first connecting block. The high-precision distance sensor is arranged inside the groove, the cover plate is arranged on the top of the first connecting block, and

[0036] a relief hole for the first connecting block and the second connecting block to penetrate is provided at the top of the fixed box. The connecting plate in the first docking component is fixed to the guide block, and the connecting plate in the second docking component is fixed to the second carrier.

[0037] Preferably, the locking and unlocking component includes:

[0038] a permanent magnet, an electromagnet, a first trigger switch, a spring, and a second trigger switch.

[0039] Among them, the permanent magnet is embedded in the bottom of the first piston, the electromagnet is arranged on the inner side wall of the first chamber and cooperates with the permanent magnet, the first trigger switch is arranged at the inner bottom end of the first chamber, the second trigger switch is arranged at the bottom of the support plate, and both the first trigger switch and the second trigger switch are electrically connected to the electromagnet. One end of the spring is connected to the bottom of the first piston, and the other end of the spring is connected to the inner bottom end of the first chamber.

[0040] Preferably, the anti-tilting detection component includes:

[0041] a connecting frame, a connecting box, a pressure sensor, a contact plate, and an arc plate.

[0042] Wherein, the connecting frame is fixed to the top of the supporting plate, the connecting box is arranged on the top of the connecting frame, and a central cavity is opened at the center of the connecting box, and at least eight sub-cavities are opened circumferentially inside the connecting box, and the sub-cavities are located outside the central cavity, the pressure sensor and the contact plate are both arranged on the inner wall of the sub-cavity, the contact plate is connected to the pressure detection end of the pressure sensor, the arc plate is arranged on the end surface of the contact plate away from the pressure sensor and penetrates into the interior of the central cavity, and the interior of the central cavity is filled with liquid.

[0043] Compared with the prior art, one or more of the above technical solutions have the following beneficial effects:

[0044] 1. In the underwater plastic pelletizer, when the mobile pelletizing assembly moves, the first docking assembly will also move synchronously, and the first docking assemblies at the front and rear ends of the mobile pelletizing assembly will respectively correspond to the second docking assemblies at the front and rear ends of the second carrier frame, thereby realizing the accurate measurement of the moving distance and orientation during the movement of the mobile pelletizing assembly, ensuring the accuracy of the distance between the cutting point and the die head, thereby avoiding the problem of thin and long strips of the linear material and ensuring the pelletizing production quality;

[0045] 2. In the plastic underwater pelletizer, in the initial state, the electromagnet is powered off. Under the action of the first spring, the first piston drives the second connecting block to rise to the top. Since the first chamber and the second chamber are connected through the connecting hole, when the first piston rises to the highest limit, the second piston will drop to the lowest limit, so that the first connecting block drives the high-precision distance sensor to shrink into the second chamber, and the cover plate blocks the hole at the top of the second chamber. When the second connecting block is pressed to drop to the lowest limit, the first connecting block will rise to the highest limit, and the high-precision distance sensor is in the external environment again. At this time, the bottom of the first piston will contact the first trigger switch, and the electromagnet will be energized and absorb the fixed magnet, thereby ensuring that the high-precision distance sensor on the second connecting block is always in the external environment and starts to be used. When not in use, the second trigger switch is pressed to turn off the electromagnet to realize the automatic retraction of the first connecting block, thereby completing the protection of the high-precision distance sensor, and the overall use effect is better;

[0046] 3. In the underwater plastic pelletizer, when the mobile pelletizing assembly moves, the connecting box moves accordingly. Since the central cavity inside the connecting box is filled with liquid, once the mobile pelletizing assembly tilts during the movement, the liquid inside the connecting box tilts. Under the action of its gravity, the arc plate on one side of the tilted end will be subjected to greater pressure, and the pressure sensor connected to the arc plate will detect greater pressure, thereby warning people that the mobile pelletizing assembly is tilted at this time, thereby avoiding the phenomenon of linear material drift caused by the cutting plane not being parallel to the die head, and ensuring the pelletizing quality;

[0047] 4. In this plastic underwater pelletizer, after the inserted rod and the slot are cooperated with each other, the vertical insertion of the gantry is realized. Then, through the clamping connection between the clamping plate and the clamping slot between the two gantries, the mutual docking and fixation between the two gantries are realized, so that the gantries form a vertical support structure. Moreover, there are several mounting holes on the mounting plate arranged on the gantry, enabling it to install equipment and other structures at designated positions according to different usage scenarios. After installing some equipment structures on the mounting plate, the floor area can be reduced, and cable lines and the like can be uniformly stored as a whole, making the entire equipment more orderly and facilitating quick and efficient use. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The attached drawings forming a part of this invention are used to provide a further understanding of the invention. The schematic embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation to the invention.

[0049] In addition, the terms "installed", "set", "provided with", "connected", "connected to", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there can be internal communication between two devices, components, or parts. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0050] Figure 1 is the overall structural schematic diagram of the present invention;

[0051] Figure 2 is the front view of the present invention;

[0052] Figure 3 is the top view of the present invention;

[0053] Figure 4 is the structural schematic diagram of the pelletizing mechanism in the present invention;

[0054] Figure 5 is the structural schematic diagram of the moving pelletizing component and the driving component in the present invention;

[0055] Figure 6 is the structural schematic diagram of the fixed pelletizing component in the present invention;

[0056] Figure 7 is the structural schematic diagram of the vertical support component in the present invention;

[0057] Figure 8 is the exploded view of the cooperation between the bottom of the gantry and the inserted rod in the present invention;

[0058] Figure 9 It is an exploded view when two gantry frames are docked with each other in the present invention;

[0059] Figure 10 It is a schematic structural diagram of the first docking component in the present invention;

[0060] Figure 11 It is a schematic structural diagram of the first connection block in the present invention;

[0061] Figure 12 It is a schematic structural diagram of the locking and unlocking component in the present invention;

[0062] Figure 13 It is a schematic structural diagram of the anti-tilting detection component in the present invention;

[0063] Figure 14 It is a schematic internal structure diagram after the connection box is longitudinally sectioned in the present invention;

[0064] Figure 15 It is a top view of the internal structure after the connection box is horizontally sectioned in the present invention;

[0065] In the figure:

[0066] 1. Bottom plate; 2. First carrier;

[0067] 3. Granulating mechanism; 31. Moving granulating component; 311. First motor; 312. Rotating shaft; 313. Cutting hob; 314. First closed cover; 32. Fixed granulating component; 321. Screen changer; 322. Start-up valve; 323. Die head; 324. Second closed cover; 325. Water inlet pipe; 326. Water return pipe;

[0068] 4. Driving component; 41. Support plate; 42. Second motor; 43. Threaded rod; 44. Moving block; 45. Guide block; 46. Guide bar;

[0069] 5. Vertical support component; 51. Gantry frame; 52. Mounting plate; 53. Mounting hole; 54. Fixed plate; 55. Support rod; 56. Display control unit; 57. Card slot; 58. Card board; 59. Slot;

[0070] 6. First docking component; 7. Second docking component; 61. Connecting plate; 62. Support plate; 63. Fixed box; 631. First chamber; 632. Second chamber; 633. Communication hole; 64. First piston; 65. Second piston; 66. Locking and unlocking component; 661. Fixed magnet; 662. Electromagnet; 663. First trigger switch; 664. Spring; 665. Second trigger switch; 67. First connection block; 68. Cover plate; 69. Groove; 70. High-precision ranging sensor; 71. Second connection block;

[0071] 8. Anti-tilting detection component; 81. Connecting frame; 82. Connecting box; 821. Central cavity; 822. Sub-cavity; 83. Pressure sensor; 84. Contact plate; 85. Arc plate;

[0072] 9. Second bearing frame; 10. Plug rod. Detailed implementation manners

[0073] In order to enable those skilled in the art to better understand the solution of this application, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0074] Please refer to Figures 1-15 , a plastic underwater pelletizer, including a bottom plate 1, and a first bearing frame 2 is arranged on the top of the bottom plate 1. A second bearing frame 9 is fixed on the top of the first bearing frame 2. It also includes a pelletizing mechanism 3, a driving component 4, a vertical supporting component 5, a first docking component 6, a second docking component 7, and an anti-tilting detection component 8. Among them:

[0075] The pelletizing mechanism 3 includes a moving pelletizing component 31 arranged on the top of the second bearing frame 9 and a fixed pelletizing component 32 arranged on the top of the second bearing frame 9. The moving pelletizing component 31 is located on one side of the fixed pelletizing component 32; the driving component 4 is arranged on the top of the first bearing frame 2, and the driving component 4 is used to drive the moving pelletizing component 31 to move along the length direction of the first bearing frame 2, so that the moving pelletizing component 31 approaches or moves away from the fixed pelletizing component 32. Then, during use, after starting the driving component 4, the driving component 4 is used to make the moving pelletizing component 31 approach or move away from the fixed pelletizing component 32. When the moving pelletizing component 31 approaches the fixed pelletizing component 32, the two are locked, and then the subsequent pelletizing operation starts. When the moving pelletizing component 31 moves away from the fixed pelletizing component 32, a gap is generated between the two, so as to facilitate subsequent maintenance and the progress of the next cycle process;

[0076] The vertical supporting component 5 is arranged on one side of the first bearing frame 2, and it at least includes two interconnected gantry frames 51, and the shapes of the two gantry frames 51 are both L-shaped structures; the number of the first docking components 6 is at least two and they are symmetrically arranged on the front and rear sides of the moving pelletizing component 31; the number of the second docking components 7 is at least two and they are arranged on the front and rear sides of the second bearing frame 9. The two second docking components 7 are in one-to-one correspondence and alignment with the two first docking components 6; the anti-tilting detection component 8 is arranged above the first docking component 6.

[0077] Specifically, the movable granulation assembly 31 includes a first motor 311, a rotating shaft 312, a cutting hob 313, and a first enclosure 314. Among them, the rotating shaft 312 is connected to the output end of the first motor 311, the cutting hob 313 is arranged at one end of the rotating shaft 312 away from the output end of the first motor 311, the first enclosure 314 is fixed to the side of the first motor 311 facing the rotating shaft 312, and the first enclosure 314 is located outside the rotating shaft 312. Therefore, after the first motor 311 is started by an external controller, the first motor 311 can drive the rotating shaft 312 and the cutting hob 313 to rotate.

[0078] Furthermore, the fixed granulation assembly 32 includes a screen changer 321, a start-up valve 322, a die head 323, a second enclosure 324, a water inlet pipe 325, and a water return pipe 326. Among them, the screen changer 321 is arranged on the top of the second carrier 9, the start-up valve 322 is arranged on the side of the screen changer 321 facing the movable granulation assembly 31, the die head 323 is arranged on the side of the start-up valve 322 facing the movable granulation assembly 31, the second enclosure 324 is arranged on the side of the die head 323 facing the movable granulation assembly 31, the water inlet pipe 325 is arranged at the lower end of the second enclosure 324, the water return pipe 326 is arranged at the upper end of the second enclosure 324, and the first enclosure 314 and the second enclosure 324 correspond to and align with each other. The outside of the first enclosure 314 and the second enclosure 324 is closed by a locking structure (not shown in the figure), and after the first enclosure 314 and the second enclosure 324 are closed by docking, a cutting chamber is formed inside the two.

[0079] In addition, the fixed granulation assembly 32 further includes a hydraulic system, a cooling system, and a recycling system. Among them, the hydraulic system is arranged on the top of the bottom plate 1 or on the vertical support assembly 5, and the hydraulic system is connected to the end of the water inlet pipe 325. The cooling system and the recycling system are arranged on the top of the bottom plate 1.

[0080] Then, during use, when the movable granulation assembly 31 is controlled by the driving assembly 4 to move towards the fixed granulation assembly 32, the first enclosure 314 and the second enclosure 324 will be docked and closed with each other, and then the locking structure is used to lock between the two to ensure that the cutting chamber formed inside is a closed space. Then, the entire granulator system is started, and the high-speed rotating cutting hob 313 cooperates with the die head 323 to complete the granulation operation. In this embodiment, since the structures of this part all belong to the prior art, the specific structures and principles will not be described in detail here.

[0081] Furthermore, the driving assembly 4 includes a support plate 41, a second motor 42, a threaded rod 43, a moving block 44, a guiding block 45 and a guiding strip 46. Among them, the number of support plates 41 is two and they are fixed to the top of the first carrier 2. The second motor 42 is installed on the side of one of the support plates 41. The threaded rod 43 is rotatably connected between the two support plates 41, and one end of the threaded rod 43 is connected to the output end of the second motor 42. The moving block 44 is arranged outside the threaded rod 43 and is threadedly connected to the threaded rod 43. The top ends of the moving block 44 and the guiding block 45 are both fixed to the bottom of the first motor 311. The guiding strip 46 is arranged on the top of the second carrier 9, and the guiding block 45 is slidably connected to the guiding strip 46.

[0082] Therefore, when using the driving structure, after starting the second motor 42, the second motor 42 drives the threaded rod 43 to rotate. Under the action of the sliding connection and guiding between the guiding block 45 and the guiding strip 46, the moving block 44 can drive the moving granulation assembly 31 to move, thus facilitating the subsequent granulation operation.

[0083] In addition, the vertical support assembly 5 further includes a mounting plate 52, a fixing plate 54, a support rod 55 and a display control unit 56. Among them, the mounting plate 52 is arranged on the gantry 51, and a number of mounting holes 53 are equidistantly arranged on the mounting plate 52. The fixing plate 54 is mounted on the mounting plate 52 through the mounting holes 53. The support rod 55 is arranged at one end of the fixing plate 54 facing the granulation mechanism 3. The display control unit 56 is arranged at the bottom of the support rod 55.

[0084] Moreover, inserting rods 10 are fixed to both the front and rear ends of the first carrier 2. Insertion slots 59 for inserting the inserting rods 10 are provided at the bottom of the gantry 51. Clamping plates 58 are fixed between the opposite ends of the two gantries 51 and clamping grooves 57 are provided. The clamping plate 58 on one gantry 51 is clamped with the clamping groove 57 on the other gantry 51.

[0085] Then, during use, after the inserting rods 10 and the insertion slots 59 are cooperatively arranged, the vertical insertion of the gantry 51 is realized. Then, by using the clamping connection between the clamping plates 58 and the clamping grooves 57 between the two gantries 51, the mutual docking and fixing between the two gantries 51 are realized, thereby enabling the gantry 51 to form a vertical support structure. And a number of mounting holes 53 are provided on the mounting plate 52 arranged on the gantry 51, enabling the installation of equipment and other structures at designated positions according to different usage scenarios. After installing some equipment structures on the mounting plate 52, the floor area can be reduced, and cable lines and the like can be uniformly stored as a whole, making the entire equipment more orderly and conducive to rapid and efficient use.

[0086] Furthermore, both the first docking component 6 and the second docking component 7 include a connecting plate 61, a support plate 62, a fixing box 63, a first piston 64, a second piston 65, a locking and unlocking component 66, a first connecting block 67, a cover plate 68, a high-precision distance sensor 70, and a second connecting block 71. Among them, the support plate 62 is fixed to the bottom of the connecting plate 61, the fixing box 63 is fixed to the top of the support plate 62, and a first chamber 631, a second chamber 632, and a communication hole 633 for connecting the two are provided inside the fixing box 63. The first piston 64 and the locking and unlocking component 66 are both arranged inside the first chamber 631, the second piston 65 is arranged inside the second chamber 632, the second connecting block 71 is arranged on the top of the first piston 64, the first connecting block 67 is arranged on the top of the second piston 65, and a groove 69 is provided on the side of the first connecting block 67. The high-precision distance sensor is arranged inside the groove 69, the cover plate 68 is arranged on the top of the first connecting block 67, and a through hole for the first connecting block 67 and the second connecting block 71 to penetrate is provided on the top of the fixing box 63. The connecting plate 61 in the first docking component 6 is fixed to the guiding block 45, and the connecting plate 61 in the second docking component 7 is fixed to the second carrier 9.

[0087] The locking and unlocking component 66 includes a permanent magnet 661, an electromagnet 662, a first trigger switch 663, a spring 664, and a second trigger switch 665. Among them, the permanent magnet 661 is embedded in the bottom of the first piston 64, the electromagnet 662 is arranged on the inner side wall of the first chamber 631 and cooperates with the permanent magnet 661, the first trigger switch 663 is arranged at the inner bottom end of the first chamber 631, the second trigger switch 665 is arranged at the bottom of the support plate 62, and both the first trigger switch 663 and the second trigger switch 665 are electrically connected to the electromagnet 662. One end of the spring 664 is connected to the bottom of the first piston 64, and the other end of the spring 664 is connected to the inner bottom end of the first chamber 631.

[0088] Therefore, in this embodiment, by docking the high-precision distance sensors in the first docking component 6 with the high-precision distance sensors in the second docking component 7, and the first docking component 6 is fixed to the mobile granulation component 31, while the second docking component 7 is fixed to the second carrier 9. When the mobile granulation component 31 moves, the first docking component 6 will also move synchronously. Combining the first docking components 6 at the front and rear ends of the mobile granulation component 31 with the second docking components 7 at the front and rear ends of the second carrier 9 to cooperate with each other, the accurate measurement of the moving distance and orientation during the movement of the mobile granulation component 31 is realized, ensuring the accuracy of the distance between the cutting point and the die head 323, thus avoiding the problem of the wire material being slender, and ensuring the quality of granulation production.

[0089] Specifically, when in use, in the initial state, the electromagnet 662 is powered off, and under the action of the first spring 664, the first piston 64 drives the second connecting block 71 to rise to the top. Since the first chamber 631 and the second chamber 632 are connected through the connecting hole 633, when the first piston 64 rises to the highest limit, the second piston 65 will drop to the lowest limit, so that the first connecting block 67 drives the high-precision distance sensor to shrink into the second chamber 632, and the cover plate 68 blocks the hole at the top of the second chamber 632. When the second connecting block 71 is pressed down, After falling to the lowest limit, the first connecting block 67 will rise to the highest limit, and the high-precision distance sensor will be in the external environment again. At this time, the bottom of the first piston 64 will contact the first trigger switch 663, and the electromagnet 662 will be energized and absorb the fixed magnet 661, thereby ensuring that the high-precision distance sensor on the second connecting block 71 is always in the external environment and starts to be used. When not in use, pressing the second trigger switch 665 to cut off the power to the electromagnet 662 can realize the automatic retraction of the first connecting block 67, thereby completing the protection of the high-precision distance sensor, and the overall use effect is better.

[0090] Furthermore, the anti-tilt detection component 8 includes a connecting frame 81, a connecting box 82, a pressure sensor 83, a contact plate 84 and an arc plate 85, wherein the connecting frame 81 is fixed to the top of the support plate 62, the connecting box 82 is arranged on the top of the connecting frame 81, and a central cavity 821 is opened at the center of the interior of the connecting box 82, and at least eight sub-cavities 822 are circumferentially opened inside the connecting box 82, and the sub-cavities 822 are located outside the central cavity 821, the pressure sensor 83 and the contact plate 84 are both arranged on the inner side wall of the sub-cavity 822, the contact plate 84 is connected to the pressure detection end of the pressure sensor 83, the arc plate 85 is arranged on an end surface of the contact plate 84 away from the pressure sensor 83 and penetrates into the interior of the central cavity 821, and the interior of the central cavity 821 is filled with liquid (such as water).

[0091] That is, when the mobile pelletizing component 31 moves, the connecting box 82 moves accordingly. Since the central cavity 821 inside the connecting box 82 is filled with liquid, once the mobile pelletizing component 31 tilts during movement, the liquid inside the connecting box 82 tilts. Under the action of its gravity, the arc plate 85 on one side of the tilted end will be subjected to greater pressure, thereby causing the pressure sensor 83 connected to the arc plate 85 to detect a greater pressure, thereby warning people that the mobile pelletizing component 31 is tilted at this time, thereby avoiding the phenomenon of linear material drift caused by the cutting plane not being parallel to the die head 323, thereby ensuring the pelletizing quality.

[0092] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention should cover the protection scope of the present invention by making equivalent substitutions or changes according to the technical solution and inventive concept of the present invention.

Claims

1. A plastic underwater pelletizer, comprising a bottom plate (1), and a first carrier (2) is arranged on the top of the bottom plate (1), and a second carrier (9) is fixed on the top of the first carrier (2), characterized in that: It further includes: A granulation mechanism (3), the granulation mechanism (3) includes a movable granulation assembly (31) arranged on the top of the second carrier (9) and a fixed granulation assembly (32) arranged on the top of the second carrier (9), the movable granulation assembly (31) is located on one side of the fixed granulation assembly (32); a driving assembly (4), the driving assembly (4) is arranged on the top of the first carrier (2), and the driving assembly (4) is used to drive the movable granulation assembly (31) to move along the length direction of the first carrier (2), so that the movable granulation assembly (31) approaches or moves away from the fixed granulation assembly (32); a vertical support assembly (5), the vertical support assembly (5) is arranged on one side of the first carrier (2), and it at least includes two gantry frames (51) connected to each other, and the shapes of the two gantry frames (51) are both L-shaped structures; a first docking assembly (6), the number of the first docking assemblies (6) is at least two and they are symmetrically arranged on the front and back sides of the movable granulation assembly (31); a second docking assembly (7), the number of the second docking assemblies (7) is at least two and they are arranged on the front and back sides of the second carrier (9), and the two second docking assemblies (7) and the two first docking assemblies (6) are in one-to-one correspondence and alignment; and an anti-tilt detection assembly (8), the anti-tilt detection assembly (8) is arranged above the first docking assembly (6). Both the first docking assembly (6) and the second docking assembly (7) include: a connecting plate (61), a support plate (62), a fixed box (63), a first piston (64), a second piston (65), a locking and unlocking assembly (66), a first connecting block (67), a cover plate (68), a high-precision distance measuring sensor (70) and a second connecting block (71), and the first docking assembly (6) is fixed on the movable granulation assembly (31). The anti-tilt detection assembly (8) includes: a connecting frame (81), a connecting box (82), a pressure sensor (83), a contact plate (84) and an arc plate (85). Among them, the connecting frame (81) is fixed on the top of the support plate (62), the connecting box (82) is arranged on the top of the connecting frame (81), and a central cavity (821) is opened at the center of the inner part of the connecting box (82). At least eight sub-cavities (822) are also circumferentially opened in the inner part of the connecting box (82), and the sub-cavities (822) are located outside the central cavity (821). The pressure sensor (83) and the contact plate (84) are both arranged on the inner side wall of the sub-cavity (822), the contact plate (84) is connected to the pressure detection end of the pressure sensor (83), the arc plate (85) is arranged on the end face of the contact plate (84) away from the pressure sensor (83) and penetrates into the interior of the central cavity (821), and the interior of the central cavity (821) is filled with liquid.

2. The underwater pelletizer for plastics according to claim 1, wherein: The movable granulation assembly (31) includes: The first motor (311), the rotating shaft (312), the cutting hob (313), and the first enclosure (314), wherein, the rotating shaft (312) is connected to the output end of the first motor (311), the cutting hob (313) is arranged at one end of the rotating shaft (312) far from the output end of the first motor (311), the first enclosure (314) is fixed to the side of the first motor (311) facing the rotating shaft (312), and the first enclosure (314) is located outside the rotating shaft (312).

3. The underwater pelletizer for plastics according to claim 2, wherein: The fixed pelletizing assembly (32) includes: a screen changer (321), a start-up valve (322), a die head (323), a second enclosure (324), a water inlet pipe (325), and a water return pipe (326), wherein, the screen changer (321) is arranged on the top of the second carrier (9), the start-up valve (322) is arranged on the side of the screen changer (321) facing the moving pelletizing assembly (31), the die head (323) is arranged on the side of the start-up valve (322) facing the moving pelletizing assembly (31), the second enclosure (324) is arranged on the side of the die head (323) facing the moving pelletizing assembly (31), the water inlet pipe (325) is arranged at the lower end of the second enclosure (324), the water return pipe (326) is arranged at the upper end of the second enclosure (324), and, the first enclosure (314) and the second enclosure (324) correspond to and align with each other, the outsides of the first enclosure (314) and the second enclosure (324) are butt-closed through a locking structure, and after the first enclosure (314) and the second enclosure (324) are butt-closed, a cutting chamber is formed inside the two.

4. The underwater pelletizer for plastics according to claim 3, characterized in that: The fixed pelletizing assembly (32) further includes: a hydraulic system, a cooling system, and a recovery system, wherein, the hydraulic system is arranged on the top of the bottom plate (1) or on the vertical support assembly (5), and the hydraulic system is connected to the end of the water inlet pipe (325), and the cooling system and the recovery system are arranged on the top of the bottom plate (1).

5. The underwater pelletizer for plastics according to claim 2, wherein: The driving assembly (4) includes: a support plate (41), a second motor (42), a threaded rod (43), a moving block (44), a guide block (45), and a guide bar (46), wherein, the number of the support plates (41) is two and they are fixed to the top of the first carrier (2), the second motor (42) is installed on the side of one of the support plates (41), the threaded rod (43) is rotatably connected between the two support plates (41), and one end of the threaded rod (43) is connected to the output end of the second motor (42), the moving block (44) is arranged outside the threaded rod (43) and is threadedly connected to the threaded rod (43), the tops of the moving block (44) and the guide block (45) are both fixed to the bottom of the first motor (311), the guide bar (46) is arranged on the top of the second carrier (9), and the guide block (45) is slidably connected to the guide bar (46).

6. The underwater pelletizer for plastics according to claim 1, wherein: The vertical support assembly (5) further includes: a mounting plate (52), a fixing plate (54), a support rod (55), and a display control unit (56), wherein, the mounting plate (52) is arranged on the gantry (51), and a plurality of mounting holes (53) are equidistantly formed in the mounting plate (52). The fixing plate (54) is mounted on the mounting plate (52) through the mounting holes (53). The support rod (55) is arranged at one end of the fixing plate (54) facing the pelletizing mechanism (3), and the display control unit (56) is arranged at the bottom of the support rod (55).

7. The underwater pelletizer for plastics according to claim 1, characterized in that: Insertion rods (10) are fixed at both the front and rear ends of the first carrier (2). Slots (59) adapted to be inserted with the insertion rods (10) are formed at the bottom of the gantry (51). A clamping plate (58) and a clamping slot (57) are fixed and formed respectively between the opposite ends of the two gantries (51). The clamping plate (58) on one gantry (51) is clamped with the clamping slot (57) on the other gantry (51).

8. The underwater plastic pelletizer according to claim 5, wherein: Among them, The support plate (62) is fixed to the bottom of the connecting plate (61), and the fixed box (63) is fixed to the top of the support plate (62). A first chamber (631), a second chamber (632), and a communication hole (633) for connecting the two are formed inside the fixed box (63). The first piston (64) and the locking and unlocking assembly (66) are both arranged inside the first chamber (631), the second piston (65) is arranged inside the second chamber (632), the second connecting block (71) is arranged on the top of the first piston (64), the first connecting block (67) is arranged on the top of the second piston (65), and a groove (69) is formed on the side of the first connecting block (67). The high-precision distance measuring sensor is arranged inside the groove (69), and the cover plate (68) is arranged on the top of the first connecting block (67). And, a through hole for the first connecting block (67) and the second connecting block (71) to pass through is formed at the top of the fixed box (63). The connecting plate (61) in the first docking assembly (6) is fixed to the guide block (45), and the connecting plate (61) in the second docking assembly (7) is fixed to the second carrier (9).

9. The underwater pelletizer for plastics according to claim 8, wherein: The locking and unlocking assembly (66) includes: a permanent magnet (661), an electromagnet (662), a first trigger switch (663), a spring (664), and a second trigger switch (665), Among them, the fixed magnet (661) is embedded in the bottom of the first piston (64), the electromagnet (662) is arranged on the inner side wall of the first chamber (631) and cooperates with the fixed magnet (661). The first trigger switch (663) is arranged at the inner bottom end of the first chamber (631), the second trigger switch (665) is arranged at the bottom of the support plate (62), and both the first trigger switch (663) and the second trigger switch (665) are electrically connected to the electromagnet (662). One end of the spring (664) is connected to the bottom of the first piston (64), and the other end of the spring (664) is connected to the inner bottom end of the first chamber (631).

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