A polystyrene pelletizing powder separation device

Abstract

The application discloses a polystyrene cutting granulation powder separation device, and belongs to the technical field of dust separation devices, which comprises a bag-type dust collector, and further comprises a fixing piece, a vibrating piece and a separation piece arranged on the inner side of a middle frame, wherein the fixing piece is connected with the middle frame, the fixing piece is movably connected with the vibrating piece, the bottom of the vibrating piece is provided with a plurality of separation pieces, and a bag is arranged on the separation piece; the upper part of each bag is provided with a separate separation mechanism to realize the rotation of the brush and the vibration of the bag; even if the separation mechanism of one bag fails to clean the powder on the inner wall of the corresponding bag, the normal cleaning of other bags is not affected; even if one or more separation mechanisms are not repaired, the overall use of other bags and the dust collector is not affected; the repair can be uniformly carried out after the completion of the whole powder separation process, so that the machine does not have to be stopped for overall maintenance due to the problem of one brush driving mechanism.

Description

Technical Field

[0001] This invention relates to the field of powder separation device technology, specifically a polystyrene pellet powder separation device. Background Technology

[0002] In polystyrene production, molten polystyrene, after underwater pelletizing and drying, produces a certain amount of powdery material. Since this powder is essentially still polystyrene, it has high recycling value and requires a separation device. Current separation devices generally use baghouse dust collectors, which are further divided into external filter baghouse dust collectors and internal filter baghouse dust collectors. In external filter baghouse dust collectors, the airflow enters the bag from the outside in, and the powder is intercepted on the outer wall of the bag. Then, pulse jet dust removal removes the powder from the outer wall of the bag, preventing clogging. However, external filter baghouse dust collectors are expensive and require pulse compressed airflow, resulting in high operating costs. They are mostly used as large-scale dust collection equipment. In internal filter baghouse dust collectors, the airflow enters from the inside of the bag and exits from the outside. The powder in the airflow is trapped on the inner wall of the bag. When the inner wall of the bag becomes clogged and powder needs to be removed, a motor drives a rotating tongue, which actuates a wedge-shaped block, causing the wedge to... The entire bag filter mechanism rises and then rebounds, causing the bag to vibrate and dislodge the powder from its inner wall. This bag filter dust collector does not require pulse jet dust removal, has low cost, and is often used as a small dust collection device. Because the powder adheres tightly to the inner wall of the bag, the dust dislodging effect during vibration is not good. Therefore, brushes are also installed on the inside of the bag. The brushes are driven by a motor to rotate, brushing away the powder from the inner wall of the bag. At the same time, the bag vibrates up and down, reducing the adhesion of the powder, making it easier for the brushes to dislodge the powder. Since there are multiple bags in the dust collector, it would be extremely expensive to equip each bag with a motor to drive the brushes. Therefore, the existing technology uses a single motor connected to several belts or gears to drive multiple brushes. However, if the belts or gears on the motor shaft become stuck, damaged, or misaligned, all the other brushes cannot be driven, requiring the entire dust collector to be shut down for maintenance, which affects the efficiency of powder separation. Summary of the Invention

[0003] To address the technical problems mentioned in the background section, the present invention provides a polystyrene pellet powder separation device, employing the following technical solution:

[0004] The invention includes a baghouse dust collector, comprising a purification mechanism, a separation mechanism, and a collection mechanism installed in sections from top to bottom. The separation mechanism includes a central frame with a set of beams fixedly connected to it. It also includes a fixing component, a vibrating component, and a separation component disposed inside the central frame. The fixing component is connected to the central frame and movably connected to the vibrating component. One end of the vibrating component is connected to the beams, and several separation components are disposed at the bottom of the vibrating component, with filter bags disposed on each separation component.

[0005] Furthermore, the fasteners include a fixing plate fixed to the central frame. The fixing plate has several fixing plate bearing holes and fixing plate through holes. Fixing plate bearings are fixedly connected in the fixing plate bearing holes. A motor is fixedly connected to the upper part of the fixing plate. A tongue is fixedly connected to the output shaft of the motor. A set of limiting rods is movably connected through the fixing plate. A horizontal plate is fixedly connected to the limiting rods. A square rod is fixedly connected to the horizontal plate. A wedge block is fixedly connected to one side of the square rod. The tongue and the wedge block are configured to cooperate.

[0006] Furthermore, the vibrating component includes a set of spring rods movably connected through the frame beam. A circular plate is fixedly connected to the upper end of each spring rod, and a spring is fitted onto the spring rod. The upper end of the spring is fixedly connected to the bottom of the circular plate, and the lower end is fixedly connected to the upper part of the frame beam. A connecting plate is fixedly connected to the lower end of the spring rod, and a limiting plate located inside the middle frame is fixedly connected to the connecting plate. The bottom of the limiting rod is fixedly connected to the upper part of the limiting plate. The limiting plate has a circular hole and a through hole. A connecting pipe is fixedly connected inside the circular hole, and a limiting plate bearing is fixedly connected inside the connecting pipe. The bearing is fixedly connected to a key sleeve with a keyway. A round rod is movably connected to the keyway, and a guide key is fixedly connected to the round rod. The guide key is movably inserted into the keyway. A cylinder is fixedly connected to the upper part of the round rod with a wave groove. A rotating shaft is fixedly connected to the upper part of the cylinder. The upper end of the rotating shaft is fixed inside the bearing on the fixed plate. The bearing also includes a set of columns fixed to the upper part of the limiting plate. A connecting block is fixedly connected to the column, and a collar is fixedly connected to the connecting block. The collar is movably fitted on the outside of the cylinder. A pull pin is fixedly connected to the inside of the collar and is movably embedded in the wave groove.

[0007] Furthermore, the separating component includes a cage frame, with a ring fixedly connected to the upper end of the cage frame, a cross fixedly connected to the inner side of the ring, a perforation at the center of the cross, the upper part of the perforation being fixedly connected to the bottom of the connecting pipe, an upper connecting ring fixedly connected to the bottom of the cage frame, a cloth bag covering the outside of the cage frame, and a brush provided inside the cage frame. The brush includes a brush rod and bristles fixed to both sides of the brush rod. One end of the brush rod passes through the perforation and the inner side of the connecting pipe and is fixedly connected to the bottom of the round rod. The bristles move against the inner wall of the cloth bag.

[0008] Furthermore, the bristles are made of nylon.

[0009] Furthermore, the air purification mechanism includes an upper frame fixedly connected to the upper part of the middle frame, a fan fixedly connected inside the upper frame, an air outlet opened at the top of the upper frame, and a filter fixedly connected to the bottom of the air outlet.

[0010] Furthermore, the material collection mechanism includes a lower frame fixedly connected to the bottom of the middle frame, a base plate fixedly connected to the upper part of the lower frame, several ventilation holes opened on the base plate, a lower connecting ring fixedly connected to the upper part of the ventilation holes, the upper connecting ring and the lower connecting ring movably docking, and a drawer movably connected inside the base plate.

[0011] Furthermore, the upper frame, middle frame and lower frame are all fixedly connected with sealing plates around their perimeter. Among them, a set of air inlet pipes are connected to the sealing plate located on one side of the lower frame, and valves are connected to the air inlet pipes.

[0012] This invention has the following advantages: When it is necessary to clean the powder adhering to the inner wall of the filter bag, the fixing component is activated. During the process of the fixing component lifting the vibrating component, the vibrating component drives the brush inside the separating component to rotate. The brush brushes away the dust on the inner wall of the filter bag. When the vibrating component is lifted to a certain height by the fixing component, the vibrating component is released. Under the action of its own weight and rebound force, the vibrating component descends and makes impact, which greatly reduces the adhesion of the powder on the inner wall of the filter bag, making it easier for the brush to brush off. During the descent, the brush also rotates. This invention sets a separate separating mechanism at the top of each filter bag to realize the rotation of the brush and the vibration of the filter bag. In this way, even if the separating mechanism of one filter bag fails and cannot clean the powder on the inner wall of the corresponding filter bag, it will not affect the normal cleaning of other filter bags. Even if one or more separating mechanisms are not repaired, it will not affect the use of other filter bags and the overall use of the dust collector. Repair can be carried out uniformly after the entire powder separation process is completed. This way, the entire machine will not have to be shut down for maintenance because of a problem with one brush drive mechanism. Attached Figure Description

[0013] Figure 1 The structure of this invention without the sealing plate Figure 1 ;

[0014] Figure 2 This is a structural diagram of the present invention;

[0015] Figure 3 The structure of this invention without the sealing plate Figure 2 ;

[0016] Figure 4 For the present invention Figure 1 Diagram of the gas purification mechanism;

[0017] Figure 5 For the present invention Figure 1 Central aggregate mechanism structure diagram;

[0018] Figure 6 For the present invention Figure 1 Middle separation mechanism structure Figure 1 ;

[0019] Figure 7 For the present invention Figure 6 A magnified view of a portion of point a;

[0020] Figure 8 For the present invention Figure 1 Middle separation mechanism structure Figure 2 ;

[0021] Figure 9 For the present invention Figure 8 A magnified view of a section at point b in the middle;

[0022] Figure 10 For the present invention Figure 6 Structural diagram without the fixing plate;

[0023] Figure 11 For the present invention from Figure 10 A structural diagram of a single separated component extracted from the image;

[0024] Figure 12 For the present invention Figure 11 A magnified view of a section at point c in the middle;

[0025] Figure 13 For the present invention Figure 11 Remove the structure of the cloth bag Figure 1 ;

[0026] Figure 14 For the present invention Figure 11 Remove the structure of the cloth bag Figure 2 .

[0027] Attached Figures: 1. Central Frame, 2. Beam, 3. Bag, 4. Fixing Plate, 5. Fixing Plate Bearing Hole, 6. Fixing Plate Through Hole, 7. Fixing Plate Bearing, 8. Motor, 9. Tongue, 10. Horizontal Plate, 11. Square Rod, 12. Wedge Block, 13. Spring Rod, 14. Circular Plate, 15. Spring, 16. Connecting Plate, 17. Limiting Plate, 18. Limiting Plate Circular Hole, 19. Limiting Plate Through Hole, 20. Connecting Pipe, 21. Limiting Plate Bearing, 22. Key Sleeve, 23. Keyway, 24. Circular Rod, 25. Guide Key, 26. 27. Cylinder, 28. Wave groove, 29. Shaft, 30. Column, 31. Connecting block, 32. Ring, 33. Pull pin, 34. Cage bone, 35. Ring, 36. Cross, 37. Perforation, 38. Upper connecting ring, 39. Brush rod, 40. Brush bristles, 41. Upper frame, 42. Fan, 43. Air outlet, 44. Filter screen, 45. Lower frame, 46. Base plate, 47. Ventilation hole, 48. Lower connecting ring, 49. Drawer, 50. Sealing plate, 51. Air inlet pipe, 52. Valve, 53. Limiting rod. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Please refer to Figure 1-14 This invention provides a polystyrene pellet powder separation device, including a bag filter dust collector. The dust collector includes a purification mechanism, a separation mechanism, and a collection mechanism installed in sections from top to bottom. The separation mechanism separates the powder carried in the dry airflow. The airflow after the powder is separated enters the purification mechanism and is discharged. The separated powder falls into the collection mechanism and is collected. The separation mechanism includes a central frame 1, a set of support beams 2 fixedly connected to the central frame 1, and also includes a fixing component, a vibrating component, and a separation component disposed inside the central frame 1. The fixing component drives the vibrating component, and the vibrating component drives the separation component. The fixing component is connected to the central frame 1 and movably connected to the vibrating component. One end of the vibrating component is connected to the support beam 2. Several separation components are disposed at the bottom of the vibrating component, and a filter bag 3 is disposed on the separation component.

[0030] The fasteners include a fixed plate 4 fixed to the central frame 1. The fixed plate 4 has several fixed plate bearing holes 5 and fixed plate through holes 6. Fixed plate bearings 7 are fixedly connected in the fixed plate bearing holes 5. A motor 8 is fixedly connected to the upper part of the fixed plate 4. A tongue 9 is fixedly connected to the output shaft of the motor 8. The motor 8 drives the tongue 9 to rotate slowly. A set of limiting rods 52 is movably connected through the fixed plate 4. A horizontal plate 10 is fixedly connected to the limiting rods 52. A square rod 11 is fixedly connected to the horizontal plate 10. A wedge block 12 is fixedly connected to one side of the square rod 11. The tongue 9 and the wedge block 12 are fitted together. The tongue 9 is triangular in shape. When the tongue 9 rotates, it pushes the bottom of the wedge block 12, causing the wedge block 12 to move upward. The wedge block 12 drives the square rod 11, the horizontal plate 10 and the limiting rod 52 to rise.

[0031] The vibrating component includes a set of spring rods 13 that are movably connected through the frame beam 2. A circular plate 14 is fixedly connected to the upper end of the spring rods 13. A spring 15 is sleeved on the spring rods 13. The upper end of the spring 15 is fixedly connected to the bottom of the circular plate 14, and the lower end is fixedly connected to the upper part of the frame beam 2. The upper end of the spring 15 is fixed by the circular plate 14, and the spring rods 13 are movably suspended on the frame beam 2 by the spring 15. A connecting plate 16 is fixedly connected to the lower end of the spring rods 13. A limiting plate 17 located inside the middle frame 1 is fixedly connected to the connecting plate 16. Through the connection between the limiting plate 17 and the connecting plate 16, and the connection between the connecting plate 16 and the spring rods 13, the limiting plate 17 is suspended on the spring rods 13. The bottom of the limiting rod 52 is fixed to the upper part of the limiting plate 17. When the limiting rod 52 rises and falls, it drives the limiting plate 17 to rise and fall. The limiting plate 17 has a limiting plate circular hole 18 and a limiting plate through hole 19. A connecting pipe 20 is fixedly connected in the limiting plate circular hole 18. A limiting plate bearing 21 is fixedly connected in the connecting pipe 20. A key sleeve 22 is fixedly connected in the limiting plate bearing 21. A key groove 23 is opened on the key sleeve 22. A round rod 24 is movably connected in the key groove 23. A guide key 25 is fixedly connected on the round rod 24. The guide key 25 is movably inserted into the key groove 23. When the round rod 24 rotates, it drives the guide key 25 to rotate. The guide key 25 drives the key groove 23, and the key groove 23 drives the key sleeve 22 to rotate in the limiting plate bearing 21. At the same time, the round rod 24 can slide in the key groove 23 through the guide key 25.

[0032] A cylinder 26 is fixedly connected to the upper part of the round rod 24. A wave groove 27 is formed on the cylinder 26. Rotation of the round rod 24 drives the cylinder 26 to rotate. A rotating shaft 28 is fixedly connected to the upper part of the cylinder 26. The upper end of the rotating shaft 28 is fixed inside the fixed plate bearing 7. Rotation of the cylinder 26 drives the rotating shaft 28 to rotate within the fixed plate bearing 7. Because the rotating shaft 28 is fixed inside the fixed plate bearing 7, the rotating shaft 28, cylinder 26, round rod 24, and guide key 25 are all suspended below the fixed plate 4. It also includes a... The column 29 is assembled, and a connecting block 30 is fixedly connected to the column 29. A collar 31 is fixedly connected to the connecting block 30, so that the collar 31 is fixed on the upper side of the limiting plate 17. The collar 31 is movably sleeved on the outer side of the cylinder 26. A pull pin 32 is fixedly connected to the inner side of the collar 31. The pull pin 32 is movably embedded in the wave groove 27. When the collar 31 rises and falls with the limiting plate 17, the pull pin 32 also rises and falls with it. The pull pin 32 rises and falls in the wave groove 27, causing the wave groove 27 to rotate. The rotation of the wave groove 27 causes the cylinder 26 to rotate.

[0033] The separating component includes a cage 33, with a cloth bag 3 fitted over the cage 33. The cage 33 has a circular mesh structure, used to internally support the inside of the cloth bag 3, ensuring that the cloth bag 3 remains cylindrical and will not deform due to airflow, while also ensuring ventilation. A ring 34 is fixedly connected to the upper end of the cage 33, and a cross 35 is fixedly connected to the inner side of the ring 34. The upper part of the cloth bag 3 is fitted onto the ring 34 and the cross 35. The cross 35 can both internally support the upper part of the cloth bag 3 and ensure ventilation. A perforation 36 is opened in the center of the cross 35, and the upper part of the perforation 36 connects to the bottom of the connecting pipe 20. The cage 33 and the bag 3 are fixedly connected. The cage 33 and the bag 3 are suspended under the limiting plate 17 through the connection of the connecting pipe 20 and the perforation 36. The bottom of the cage 33 is fixedly connected to the upper connecting ring 37. A brush is provided on the inner side of the cage 33. The brush includes a brush rod 38 and brush bristles 39 fixed on both sides of the brush rod 38. One end of the brush rod 38 passes through the perforation 36 and the inner side of the connecting pipe 20 and is fixedly connected to the bottom of the round rod 24. The round rod 24 drives the brush rod 38 to rotate, and the brush rod 38 drives the brush bristles 39 to rotate. The brush bristles 39 brush off the powder on the inner wall of the bag 3. The brush bristles 39 move and abut against the inner wall of the bag 3.

[0034] The bristles 39 are made of nylon. Since the bristles 39 need to be pressed against the inner wall of the bag 3 and the cage ribs 33 are located inside the bag 3, the bristles 39 are made of elastic nylon. This allows the bristles 39 to adapt to the rising of the cage ribs 33 and the bag 3 and the rotation of the bristles 39, and the end that is pressed against the cage ribs 33 can also bend accordingly.

[0035] The air purification mechanism includes an upper frame 40 fixedly connected to the upper part of the middle frame 1. A fan 41 is fixedly connected inside the upper frame 40. An air outlet 42 is opened at the upper part of the upper frame 40. A filter screen 43 is fixedly connected to the bottom of the air outlet 42. Air is drawn in by the negative pressure of the fan 41, so that the airflow enters the dust collector and is discharged through the air outlet 42. The filter screen 43 can intercept a portion of the powder in the discharged airflow.

[0036] The material collection mechanism includes a lower frame 44 fixedly connected to the bottom of the middle frame 1. A base plate 45 is fixedly connected to the upper part of the lower frame 44. Several ventilation holes 46 are provided on the base plate 45 so that the airflow under the base plate 45 can only enter the bag 3 through the ventilation holes 46. A lower connecting ring 47 is fixedly connected to the upper part of the ventilation holes 46. The upper connecting ring 37 and the lower connecting ring 47 are movably connected. A drawer 48 is movably connected inside the base plate 45. The intercepted powder falls into the drawer 48 under its own weight. The drawer 48 is easy to pull out and take out the powder.

[0037] The upper frame 40, the middle frame 1, and the lower frame 44 are all fixedly connected with sealing plates 49. The sealing plates 49 seal the outer surface of the dust collector to prevent air leakage. A set of air inlet pipes 50 are connected to the sealing plate 49 on one side of the lower frame 44. A valve 51 is connected to the air inlet pipes 50. The valve 51 controls the opening and closing of the air inlet pipes 50. The dry airflow carrying the powder enters the lower frame 44 through the air inlet pipes 50 under negative pressure.

[0038] Working principle of the invention:

[0039] The principle of the entire separation device for separating powder materials:

[0040] When the fan 41 is started, under negative pressure, the dry airflow carrying the powder enters the space of the lower frame 44 through the air inlet pipe 50. Then the airflow enters the bag 3 through the ventilation hole 46. The powder in the airflow is intercepted by the inner wall of the bag 3. Some of it adheres to the inner wall of the bag 3, and some of it falls into the drawer 48 under the action of gravity. The clean airflow passes through the bag 3 and enters the space of the middle frame 1. Then it enters the fan 41 through the limit plate through hole 19 and the fixing plate through hole 6. After exiting through the fan 41, it enters the space of the upper frame 40 and is discharged through the air outlet 42.

[0041] When it is necessary to clean the powder adhering to the inner wall of bag 3:

[0042] When motor 8 is started, it drives tongue 9 to rotate slowly clockwise. When tongue 9 abuts against the bottom of wedge block 12, it pushes wedge block 12 upward. Wedge block 12 drives square rod 11, horizontal plate 10, and limiting rod 52 upward. Limiting rod 52 drives limiting plate 17. Limiting plate 17 drives connecting pipe 20, limiting plate bearing 21, and key sleeve 22 upward. Connecting pipe 20 drives the entire separating component upward. During this process, column 29, connecting block 30, collar 31, and pull pin 32 also rise with limiting plate 17. Limiting plate 17 drives... Connecting plate 16 drives spring rod 13 and disc 14 to rise. Spring rod 13 rises, causing spring 15 to stretch. Pull pin 32 rises within wave groove 27, causing wave groove 27 to rotate. Wave groove 27 causes cylinder 26 to rotate. Cylinder 26, with shaft 28, rotates within fixed plate bearing 7, also causing round rod 24 to rotate. Round rod 24 causes guide key 25 to rotate. Guide key 25 causes keyway 23 to rotate. Keyway 23 causes key sleeve 22 to rotate. Key sleeve 22 rotates within limit plate bearing 21 and through guide key 25. The movable connection between key 5 and keyway 23 causes key sleeve 22 to rise simultaneously on round rod 24, while round rod 24 drives brush rod 38 to rotate, which in turn drives brush bristles 39 to rotate, brushing away powder from the inner wall of cloth bag 3. When tongue 9 rotates to a certain point, its end leaves the bottom of the abutting wedge block 12. The wedge block 12 restricts movement, and under the elastic force of spring 15 and gravity, it falls rapidly, subsequently causing cage 33, cloth bag 3, and upper connecting ring 37 to fall rapidly. Upper connecting ring 37 strikes lower connecting ring 47. The cage 33 and the bag 3 vibrate, which greatly reduces the adhesion of the powder on the inner wall of the bag 3. The pin 32 continues to slide in the wave groove 27 during the descent, and continues to drive the cylinder 26 to rotate. Therefore, the brush is still rotating when the bag 3 is descending. Since the tongue 9 is constantly rotating, when the tongue 9 rotates and touches the bottom of the wedge block 12 again, the wedge block 12 is lifted again and then falls and vibrates rapidly again. During this process, the brush is constantly rotating, which makes it easier for the rotating bristles 39 to brush off the powder on the inner wall of the bag 3.

[0043] This invention is simple to operate, convenient to use, and suitable for widespread promotion and application. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A polystyrene pellet powder separation device, comprising a bag filter, the bag filter including a purification mechanism, a separation mechanism, and a collection mechanism installed in sections from top to bottom, characterized in that, The separation mechanism includes a central frame (1), a set of beams (2) are fixedly connected to the central frame (1), and also includes a fixing component, a vibrating component and a separation component set inside the central frame (1). The fixing component is connected to the central frame (1), the fixing component is movably connected to the vibrating component, one end of the vibrating component is connected to the beams (2), and several separation components are set at the bottom of the vibrating component. A cloth bag (3) is set on the separation component.

2. The polystyrene pellet powder separation device according to claim 1, characterized in that, The fasteners include a fixing plate (4) fixed on the middle frame (1), a number of fixing plate bearing holes (5) and fixing plate through holes (6) are provided on the fixing plate (4), a fixing plate bearing (7) is fixedly connected in the fixing plate bearing hole (5), a motor (8) is fixedly connected on the upper part of the fixing plate (4), a tongue (9) is fixedly connected on the output shaft of the motor (8), a set of limiting rods (52) is movably connected through the fixing plate (4), a horizontal plate (10) is fixedly connected on the limiting rod (52), a square rod (11) is fixedly connected on the horizontal plate (10), a wedge block (12) is fixedly connected on one side of the square rod (11), and the tongue (9) and the wedge block (12) are fitted together.

3. The polystyrene pellet powder separation device according to claim 2, characterized in that, The vibrating component includes a set of spring rods (13) that are movably connected through the frame beam (2). A circular plate (14) is fixedly connected to the upper end of the spring rod (13). A spring (15) is sleeved on the spring rod (13). The upper end of the spring (15) is fixedly connected to the bottom of the circular plate (14), and the lower end is fixedly connected to the upper part of the frame beam (2). A connecting plate (16) is fixedly connected to the lower end of the spring rod (13). A limiting plate (17) located inside the middle frame (1) is fixedly connected to the connecting plate (16). The bottom of the limiting rod (52) is fixedly connected to the upper part of the limiting plate (17). A limiting plate circular hole (18) and a limiting plate through hole (19) are opened on the limiting plate (17). A connecting pipe (20) is fixedly connected inside the limiting plate circular hole (18). A limiting plate bearing (21) is fixedly connected inside the connecting pipe (20). A key sleeve (22) is fixedly connected inside the limiting plate bearing (21). The key sleeve (22) has a keyway (23), a round rod (24) is movably connected in the keyway (23), a guide key (25) is fixedly connected on the round rod (24), the guide key (25) is movably inserted in the keyway (23), a cylinder (26) is fixedly connected to the upper part of the round rod (24), a wave groove (27) is opened on the cylinder (26), a rotating shaft (28) is fixedly connected to the upper part of the cylinder (26), the upper end of the rotating shaft (28) is fixed inside the fixed plate bearing (7), and also includes a set of columns (29) fixed on the upper part of the limiting plate (17), a connecting block (30) is fixedly connected to the column (29), a collar (31) is fixedly connected to the connecting block (30), the collar (31) is movably sleeved on the outside of the cylinder (26), a pull pin (32) is fixedly connected to the inside of the collar (31), and the pull pin (32) is movably embedded in the wave groove (27).

4. The polystyrene pellet powder separation device according to claim 3, characterized in that, The separating component includes a cage (33), with a ring (34) fixedly connected to the upper end of the cage (33), a cross (35) fixedly connected to the inner side of the ring (34), a perforation (36) being provided at the center of the cross (35), the upper part of the perforation (36) being fixedly connected to the bottom of the connecting pipe (20), an upper connecting ring (37) being fixedly connected to the bottom of the cage (33), a cloth bag (3) being fitted on the outside of the cage (33), and a brush being provided on the inner side of the cage (33). The brush includes a brush rod (38) and bristles (39) fixed on both sides of the brush rod (38). One end of the brush rod (38) passes through the perforation (36) and the inner side of the connecting pipe (20) and is fixedly connected to the bottom of the round rod (24). The bristles (39) move against the inner wall of the cloth bag (3).

5. The polystyrene pellet powder separation device according to claim 4, characterized in that, The bristles (39) are made of nylon.

6. The polystyrene pellet powder separation device according to claim 5, characterized in that, The air purification mechanism includes an upper frame (40) fixedly connected to the upper part of the middle frame (1), a fan (41) fixedly connected inside the upper frame (40), an air outlet (42) opened on the upper part of the upper frame (40), and a filter screen (43) fixedly connected to the bottom of the air outlet (42).

7. The polystyrene pellet powder separation device according to claim 6, characterized in that, The material collection mechanism includes a lower frame (44) fixedly connected to the bottom of the middle frame (1), a base plate (45) fixedly connected to the upper part of the lower frame (44), a number of ventilation holes (46) are provided on the base plate (45), a lower connecting ring (47) is fixedly connected to the upper part of the ventilation holes (46), the upper connecting ring (37) and the lower connecting ring (47) are movably connected, and a drawer (48) is movably connected inside the base plate (45).

8. The polystyrene pellet powder separation device according to claim 7, characterized in that, The upper frame (40), middle frame (1) and lower frame (44) are all fixedly connected with sealing plates (49). A set of air inlet pipes (50) are connected to the sealing plate (49) on one side of the lower frame (44), and a valve (51) is connected to the air inlet pipes (50).

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