Granulator for extrusion granulation system

Abstract

A granulator for an extrusion granulation system comprises a water chamber and a cutter shaft box, a cutter shaft is installed in the cutter shaft box through a cutter stabilizing bearing seat and a locking bearing seat in a matched mode, one end of the cutter shaft extends into the water chamber and is provided with a cutter head, and the cutter head is close to a material opening in the side wall of the water chamber and can be attached to a template of the extrusion granulation system. Water passing openings are formed in the upper side and the lower side of the water chamber respectively. The translation oil cylinder drives the shafting assembly to move, the locking oil cylinder locks the axial movement of the cutter shaft, the plurality of cutter stabilizing assemblies are arranged between the end cover of the cutter shaft and the cutter stabilizing bearing seat, and the elastic force of the plurality of cutter stabilizing springs can enable the cutter head to be stably close to a template and absorb axial vibration. The top side of the cutter shaft box is symmetrically provided with a plurality of vibration reduction assemblies divided into two rows, one end of each vibration reduction spring abuts against a spring cover, the other end of each vibration reduction spring is arranged in an axial sliding groove in the outer wall of the bearing seat in a pressed mode through a sliding block, radial vibration can be effectively absorbed while the axial movement of the bearing seat is not affected, and the cutter shaft is kept stable in the pelletizing process.

Description

Technical Field

[0001] The utility model relates to the field of extrusion granulation systems, in particular to a granulator used in extrusion granulation systems. Background Art

[0002] The extrusion granulation unit mixes, plasticizes, extrudes, pelletizes, separates, and dries materials, ultimately processing them into uniform pellets. The extrusion granulation system is a key component of the unit and primarily consists of a melt gear pump, screen changer, die plate, and pelletizer. The molten material is conveyed by the melt gear pump, filtered through the screen changer, and then passes through the die plate into the pelletizer as strips. The pelletizer's cutter disc cuts the material into pellets, which are then carried away by the water flow. The pelletizer is a crucial component of the extrusion granulation system. Circulating water flows through this area, allowing the melt to pass through the die plate in strips. The water rapidly cools and solidifies the melt. A motor then drives the blade shaft, which rapidly rotates, cutting the newly extruded and solidified melt into pellets. The pellets are then transported to the pelletizing post-processing system via the circulating water. Due to the nature of the pelletizer's operation, the blade shaft and the entire bearing housing assembly require axial movement to adjust the relative position of the blade disc and die plate to ensure optimal pelletizing. When the cutter disc is working, it will not only be subjected to axial force, but also radial force due to the flow of circulating water. However, due to the axially movable shaft support structure, the cutter shaft and cutter disc will produce large axial and radial vibrations, affecting the pelletizing effect. Utility Model Content

[0003] In order to solve the problem that the existing pelletizer is easily affected by axial and radial vibrations, the utility model provides a pelletizer for an extrusion pelletizing system.

[0004] The technical solution adopted by the utility model to solve the above technical problems is: a pelletizer for an extrusion granulation system, comprising a water chamber and a knife shaft box, a knife shaft being mounted in the knife shaft box through a knife stabilizing bearing seat and a locking bearing seat, one end of the knife shaft extending into the water chamber and being mounted with a knife disc, the other end of the knife shaft extending from the knife shaft box and being connected to a motor through a coupling, the knife disc being close to a material opening on a side wall of the water chamber and being able to be close to a template of the extrusion granulation system so as to cut the strip material passing through the template into material particles, and water outlets being respectively provided on the upper and lower sides of the water chamber so as to send the material particles out through circulating water;

[0005] The knife stabilizing bearing seat is located between the cutter disc and the locking bearing seat. One end of the locking bearing seat extends from the cutter shaft box and is installed with a translation cylinder push plate. A plurality of translation cylinders are installed on the outer wall of the cutter shaft box. The piston rods of the translation cylinders are parallel to the cutter shaft. The piston rods of the plurality of translation cylinders are all connected to the translation cylinder push plate. The locking bearing seat, the cutter shaft and the knife stabilizing bearing seat can be driven to move axially through the plurality of translation cylinders to facilitate adjustment of the axial position of the cutter disc relative to the template.

[0006] An end cover is installed on the side of the cutter shaft box facing the water chamber, and the end cover is sleeved on the cutter shaft. A plurality of cutter stabilizing components are provided between the end cover and the cutter stabilizing bearing seat. The plurality of cutter stabilizing components are evenly spaced along the circumference of the cutter shaft. The cutter stabilizing component includes a cutter stabilizing spring and a screw positioning block. The cutter stabilizing spring is sleeved on the outside of the screw positioning block. The screw positioning block is screwed into the threaded hole on the end face of the cutter stabilizing bearing seat. The length directions of the screw positioning block and the cutter stabilizing spring are parallel to the axial direction of the cutter shaft. One end of the cutter stabilizing spring is top-mounted in the blind hole of the end cover, and the other end of the cutter stabilizing spring is installed in the annular groove on the end face of the cutter stabilizing bearing seat, so that the cutter disc can be stably close to the template through the elastic force of the plurality of cutter stabilizing springs.

[0007] A locking oil cylinder and a plurality of vibration-damping components are installed on the top outer wall of the cutter shaft box. The locking oil cylinder is vertically arranged. A locking slider is installed at the end of the piston rod of the locking oil cylinder. A slide groove is provided on the top of the locking bearing seat for the locking slider to move axially. The locking oil cylinder can press the locking slider downward into the slide groove to lock the axial movement of the cutter shaft.

[0008] Multiple vibration damping components are divided into two rows, and the two rows of vibration damping components are symmetrically arranged about a vertical plane containing the center line of the knife shaft. The vibration damping components include a spring cover, a vibration damping spring and a light rod positioning block. The vibration damping spring and the light rod positioning block are located in the radial through hole of the outer wall of the knife shaft box, and the spring cover is installed at the opening of the radial through hole. The two ends of the vibration damping spring are respectively topped on the spring cover and the light rod positioning block, and the two ends of the vibration damping spring are respectively sleeved on the protrusion of the spring cover and the outer cylindrical surface of the light rod positioning block. The side of the light rod positioning block away from the spring cover is pressed on the outer wall of the knife stabilizing bearing seat or the locking bearing seat. A slider is provided on the side of the light rod positioning block away from the spring cover. The slider is pressed in the axial slide groove of the outer wall of the knife stabilizing bearing seat or the locking bearing seat, so as to absorb the radial vibration of the knife shaft through the cooperation of multiple vibration damping springs.

[0009] Preferably, a side wall of the water chamber is provided with a viewing window and a viewing hole light for illuminating the viewing window.

[0010] Preferably, a vent cap is installed on the top outer wall of the arbor box.

[0011] According to the above technical solution, the beneficial effects of the utility model are:

[0012] The utility model can drive the movement of the shaft system assembly through the translation cylinder, and can lock the axial movement of the knife shaft through the locking cylinder, and is provided with multiple knife stabilizing assemblies between the end cover and the knife stabilizing bearing seat. The elastic force of multiple knife stabilizing springs can make the knife disc stably close to the template, and the closer the knife shaft is to the template, the greater the resistance, which avoids the knife disc and the template from colliding and being damaged, and is conducive to the smooth movement of the knife shaft and absorbs axial vibration. The top side of the knife shaft box is symmetrically provided with multiple vibration-damping assemblies divided into two columns, wherein one end of the vibration-damping spring is pressed on the spring cover, and the other end is pressed into the axial groove of the outer wall of the bearing seat through a slider, thereby effectively absorbing radial vibration without affecting the axial movement of the bearing seat, overcoming the radial impact of the circulating water carrying particles on the knife shaft, keeping the knife shaft stable during the pelletizing process, avoiding excessive wear of the knife disc and the template, and ensuring the final pelletizing effect of the pelletizer. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the main cross-section of the pelletizer;

[0014] Figure 2 for Figure 1 A partial enlarged view of

[0015] Figure 3 for Figure 2 Enlarged view of point B;

[0016] Figure 4 Schematic diagram of a top view of a pelletizer;

[0017] Figure 5 for Figure 2 AA cross-sectional view of .

[0018] Markings in the figure: 1. Water chamber, 2. Water outlet, 3. Material outlet, 4. Cutter disc, 5. Cutter shaft, 6. Coupling, 7. Cutter shaft box, 8. Cutter stabilizing bearing seat, 9. End cover, 10. Locking bearing seat, 11. Translation cylinder push plate, 12. Translation cylinder, 13. Locking cylinder, 14. Locking slider, 15. Vent cap, 16. Spring cover, 17. Cutter stabilizing spring, 18. Screw positioning block, 19. Ring groove, 20. Window, 21. Sight hole light, 22. Vibration damping spring, 23. Polish rod positioning block. DETAILED DESCRIPTION

[0019] With reference to the accompanying drawings, the specific implementation is as follows:

[0020] like Figure 1 、 2As shown, a pelletizer for an extrusion granulation system includes a water chamber 1 and a knife shaft box 7. A knife shaft 5 is installed in the knife shaft box 7 through a knife stabilizing bearing seat 8 and a locking bearing seat 10. One end of the knife shaft 5 extends into the water chamber 1 and is installed with a knife disc 4. The other end of the knife shaft 5 extends from the knife shaft box 7 and is connected to the motor through a coupling 6. The knife disc 4 is close to the material port 3 on the side wall of the water chamber 1 and can be close to the template of the extrusion granulation system to cut the strip material passing through the template into material particles. Water ports 2 are respectively provided on the upper and lower sides of the water chamber 1 to facilitate the discharge of material particles through circulating water. Figure 4 As shown, a viewing window 20 and a viewing light 21 for illuminating the viewing window 20 are installed on the side wall of the water chamber 1 .

[0021] like Figure 2 As shown, the knife steady bearing seat 8 is located between the cutter head 4 and the locking bearing seat 10. One end of the locking bearing seat 10 extends from the cutter shaft box 7 and is installed with a translation cylinder push plate 11. Figure 4 As shown, a plurality of translation cylinders 12 are installed on the outer wall of the cutter shaft box 7. The piston rods of the translation cylinders 12 are parallel to the cutter shaft 5. The piston rods of the plurality of translation cylinders 12 are all connected to the translation cylinder push plate 11. The locking bearing seat 10, the cutter shaft 5 and the cutter stabilizing bearing seat 8 can be driven axially by the plurality of translation cylinders 12 to facilitate the adjustment of the axial position of the cutter disc 4 relative to the template.

[0022] like Figure 2 、 3 As shown, an end cover 9 is installed on the side of the knife shaft box 7 facing the water chamber 1, and the end cover 9 is sleeved on the knife shaft 5. A plurality of knife stabilizing components are provided between the end cover 9 and the knife stabilizing bearing seat 8, and the plurality of knife stabilizing components are evenly spaced along the circumference of the knife shaft 5. The knife stabilizing component includes a knife stabilizing spring 17 and a screw positioning block 18. The knife stabilizing spring 17 is sleeved on the outside of the screw positioning block 18, and the screw positioning block 18 is screwed into the threaded hole on the end face of the knife stabilizing bearing seat 8. The length directions of the screw positioning block 18 and the knife stabilizing spring 17 are both parallel to the axial direction of the knife shaft 5. One end of the knife stabilizing spring 17 is topped in the blind hole of the end cover 9, and the other end of the knife stabilizing spring 17 is installed in the annular groove 19 on the end face of the knife stabilizing bearing seat 8. The elastic force of multiple knife stabilizing springs 17 enables the cutter disc 4 to be stably close to the template, and the closer the knife shaft 5 is to the template, the greater the resistance, which avoids collision and damage between the cutter disc 4 and the template, is conducive to the smooth movement of the knife shaft 5 and absorbs axial vibration.

[0023] like Figure 2 、 4As shown, the top outer wall of the cutter shaft box 7 is installed with a vent cap 15, a locking cylinder 13 and four vibration damping components. The locking cylinder 13 is vertically arranged, and a locking slider 14 is installed at the end of the piston rod of the locking cylinder 13. The top of the locking bearing seat 10 is provided with a slide groove for the locking slider 14 to move axially. The locking cylinder 13 can press the locking slider 14 downward in the slide groove to lock the axial movement of the cutter shaft 5. The slide groove extends axially to avoid interfering with the axial movement of the bearing seat.

[0024] like Figure 4 、 5 As shown, the four vibration-damping components are divided into two rows. The two rows of vibration-damping components are symmetrically arranged about the vertical plane containing the center line of the knife shaft 5. The vibration-damping components include a spring cover 16, a vibration-damping spring 22 and a polished rod positioning block 23. The vibration-damping spring 22 and the polished rod positioning block 23 are located in the radial through hole of the outer wall of the knife shaft box 7. The spring cover 16 is installed at the opening of the radial through hole. The two ends of the vibration-damping spring 22 are respectively placed on the spring cover 16 and the polished rod positioning block 23, and the two ends of the vibration-damping spring 22 are respectively sleeved on the protrusion of the spring cover 16 and the outer cylindrical portion of the polished rod positioning block 23. On the surface, the side of the polished rod positioning block 23 away from the spring cover 16 is pressed on the outer wall of the knife stabilizing bearing seat 8 or the locking bearing seat 10, and a slider is provided on the side of the polished rod positioning block 23 away from the spring cover 16. The slider is pressed in the axial groove of the outer wall of the knife stabilizing bearing seat 8 or the locking bearing seat 10, so as to effectively absorb radial vibration without affecting the axial movement of the bearing seat, overcome the radial impact of the circulating water carrying particles on the knife shaft 5, keep the knife shaft 5 stable during the pelletizing process, avoid excessive wear of the knife disc 4 and the template, and ensure the final pelletizing effect of the pelletizer.

Claims

1. A pelletizer for an extrusion pelletizing system, characterized in that: It comprises a water chamber (1) and a knife shaft box (7), wherein a knife shaft (5) is mounted in the knife shaft box (7) through a knife stabilizing bearing seat (8) and a locking bearing seat (10), one end of the knife shaft (5) extends into the water chamber (1) and is mounted with a knife disc (4), the other end of the knife shaft (5) extends from the knife shaft box (7) and is connected to the motor through a coupling (6), the knife disc (4) is close to the material port (3) on the side wall of the water chamber (1) and can be close to the template of the extrusion granulation system so as to cut the strip material passing through the template into material particles, and water ports (2) are respectively provided on the upper and lower sides of the water chamber (1) so as to send the material particles out through circulating water; The knife stabilizing bearing seat (8) is located between the cutter disc (4) and the locking bearing seat (10), one end of the locking bearing seat (10) extends from the cutter shaft box (7) and is installed with a translation cylinder push plate (11), and the outer wall of the cutter shaft box (7) is installed with multiple translation cylinders (12), the piston rods of the translation cylinders (12) are parallel to the cutter shaft (5), and the piston rods of the multiple translation cylinders (12) are all connected to the translation cylinder push plate (11), and the locking bearing seat (10), the cutter shaft (5) and the knife stabilizing bearing seat (8) can be driven to move axially through the multiple translation cylinders (12), so as to facilitate the adjustment of the axial position of the cutter disc (4) relative to the template; An end cover (9) is installed on the side of the knife shaft box (7) facing the water chamber (1), and the end cover (9) is sleeved on the knife shaft (5). A plurality of knife stabilizing components are provided between the end cover (9) and the knife stabilizing bearing seat (8), and the plurality of knife stabilizing components are evenly spaced along the circumference of the knife shaft (5). The knife stabilizing component includes a knife stabilizing spring (17) and a screw positioning block (18). The knife stabilizing spring (17) is sleeved on the outer side of the screw positioning block (18), and the screw positioning block (18) is screwed into the threaded hole on the end face of the knife stabilizing bearing seat (8). The length directions of the screw positioning block (18) and the knife stabilizing spring (17) are parallel to the axial direction of the knife shaft (5). One end of the knife stabilizing spring (17) is top-mounted in the blind hole of the end cover (9), and the other end of the knife stabilizing spring (17) is installed in the annular groove (19) on the end face of the knife stabilizing bearing seat (8), so that the knife disc (4) can be stably close to the template through the elastic force of the plurality of knife stabilizing springs (17); A locking oil cylinder (13) and a plurality of vibration-damping components are installed on the top outer wall of the cutter shaft box (7). The locking oil cylinder (13) is vertically arranged. A locking slider (14) is installed at the end of the piston rod of the locking oil cylinder (13). A sliding groove capable of allowing the locking slider (14) to move axially is provided on the top of the locking bearing seat (10). The locking slider (14) can be pressed downward into the sliding groove by the locking oil cylinder (13) so as to lock the axial movement of the cutter shaft (5). The plurality of vibration-damping components are divided into two rows, and the two rows of vibration-damping components are symmetrically arranged about a vertical plane containing the center line of the knife shaft (5). The vibration-damping components include a spring cover (16), a vibration-damping spring (22) and a light rod positioning block (23). The vibration-damping spring (22) and the light rod positioning block (23) are located in a radial through hole on the outer wall of the knife shaft box (7). The spring cover (16) is installed at the opening of the radial through hole. The two ends of the vibration-damping spring (22) are respectively placed on the spring cover (16) and the light rod positioning block (23). The vibration-damping spring (22) The two ends are respectively sleeved on the protruding portion of the spring cover (16) and the outer cylindrical surface of the polished rod positioning block (23), and the side of the polished rod positioning block (23) away from the spring cover (16) is pressed on the outer wall of the knife steadying bearing seat (8) or the locking bearing seat (10). The side of the polished rod positioning block (23) away from the spring cover (16) is provided with a slider, and the slider is pressed in the axial slot of the outer wall of the knife steadying bearing seat (8) or the locking bearing seat (10) so as to absorb the radial vibration of the knife shaft (5) through the cooperation of multiple vibration-damping springs (22).

2. A pelletizer for an extrusion pelletizing system according to claim 1, characterized in that: A viewing window (20) and a viewing hole lamp (21) for illuminating the viewing window (20) are installed on the side wall of the water chamber (1).

3. The pelletizer for an extrusion pelletizing system according to claim 1, characterized in that: A vent cap (15) is installed on the top outer wall of the knife shaft box (7).

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