Plastic raw material particle screening device

Abstract

The invention relates to the technical field of plastic processing, in particular to a plastic raw material particle screening device which comprises three sets of screens, each screen comprises three connecting rings, a screen cylinder is fixedly connected among the three connecting rings, and the right side of the left connecting ring and the left side of the right connecting ring are each fixedly connected with two transmission frames. A transmission ring is arranged on the outer side of the transmission frame, a threaded pin is connected to the inner side of the transmission ring in an inserted mode, and the inner side of the transmission frame is connected with the threaded pin in an inserted mode. According to the plastic raw material particle screening device, the cylindrical rotary screen serves as a core screening part, separation of particles with different particle sizes is achieved in cooperation with the multi-stage aperture design, and the problems that when a large number of materials are treated through a traditional vibrating screen, the screening efficiency is low, and the particles make contact with the screen unevenly are solved; and the material conveying speed can be adjusted by controlling the motor, and diversified screening requirements can be met through the flexible operation characteristics that the number of layers of the screen cloth is increased or decreased by disassembling and assembling the conical frame.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic processing, in particular to a plastic raw material particle screening device. Background Art

[0002] As we all know, plastic raw material particles refer to small granular substances obtained by decomposing and processing various plastics. They are important raw materials widely used in various industries. They can be divided into two categories: thermoplastics and thermosetting plastics. Thermoplastics have linear molecules, are plastic when heated, and can solidify again after melting and cooling. They can be repeatedly heated and formed, such as polyethylene, polyvinyl chloride, polystyrene, etc. Thermosetting plastics have a linear molecular structure before the first solidification. After the first solidification, the linear molecules cross-link with each other to form a spatial body structure. This change is irreversible and cannot be heated repeatedly, such as polyurethane resin, phenolic resin, etc. After processing, they sometimes need to be screened according to particle size for use in different scenarios or for secondary processing of raw material particles that are too large or relatively fine.

[0003] The existing technology has the following problems: most of them use vibrating screens for screening, but this method easily causes the upper particles to not evenly contact the screen when a large amount of material is added at one time, resulting in a limited screening effect. In addition, there are baffles on both sides of the screen, and the rubber particles contact the baffles and move along the baffles, which also affects the screening effect. In addition, for some temperature-sensitive materials, it is easy for particles to stick together. Based on the above-mentioned problems, we found that it is difficult for existing plastic raw material particle screening devices to avoid the above problems at the same time. Therefore, we proposed a plastic raw material particle screening device that can effectively and continuously screen plastic raw materials, and can still operate effectively when screening a large amount of raw materials, thereby improving screening efficiency and reducing the probability of particle adhesion. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the present invention provides a plastic raw material particle screening device, which has the advantages of being able to effectively and continuously screen plastic raw materials, and can still operate effectively when screening a large amount of raw materials, thereby improving screening efficiency and reducing the probability of particle adhesion.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions: A plastic raw material particle screening device includes three sets of screens; The screen comprises three connecting rings, and a mesh cylinder is fixedly connected between the three connecting rings; The right side of the left connecting ring and the left side of the right connecting ring are both fixedly connected to two transmission frames, a transmission ring is provided on the outer side of the transmission frame, a threaded pin is inserted on the inner side of the transmission ring, the inner side of the transmission frame is plugged into the threaded pin, the top and bottom of the threaded pin are both threadedly connected to the limiting screw sleeve, and two pressure springs are sleeved on the outer side of the threaded pin, and the two ends of the pressure spring are in contact with the transmission frame and the transmission ring respectively; Four conical frames are inserted into the inner side of the connecting ring, and a stabilizing piece is provided on the side where the four conical frames are close to each other. The stabilizing piece is threadedly connected to the conical frame on the side close to the conical frame. A force-bearing frame is provided on the outer side of the right transmission ring, and a roller is rotatably connected to the inner side of the force-bearing frame. The side of the roller close to the right transmission ring is in contact with the right transmission ring. The bottom of the force-bearing frame is fixedly connected to the frame, and a motor and a reducer are installed on the top of the rear side of the frame. The output ends of the motor and the reducer are movably connected to the left transmission ring.

[0006] The above technical solution is adopted, by setting three groups of screens to be distributed inside and outside into three groups of cylindrical shapes, each group of screens is composed of two mesh cylinders clamped between three connecting rings, and the mesh diameter of the outer mesh cylinder is successively smaller than the mesh diameter of the inner mesh cylinder. Therefore, when screening, the plastic raw material particles can be directly input into the inner side of the innermost screen. Since the three groups of screens pass through the connecting rings through the conical frame and are fixed by the fixing parts, the three groups of connecting rings will roll synchronously. While rolling, the dynamic particles will pass through the mesh, and the smaller-sized granular materials will fall on the inner side of the outer screen, while the larger-sized ones will be retained on the inner side of the current screen and transferred to the right side of the screen during the continuous movement, and the material particles of different particle sizes are output from different positions on the right side of the screen. Since the screen is set to be cylindrical, its four The weekly is an effective screening environment. Even if a large amount of material particles are input, they can pass through the mesh cylinder quickly. Moreover, according to needs, the conical frame can be disassembled and assembled to install more layers of screens to achieve more accurate screening. When the equipment is installed, the transmission ring can be clamped on the outside of the transmission frame, and the transmission ring and the transmission frame are penetrated by a threaded pin, and the installation is completed by screwing the limit screw sleeve on both ends of the threaded pin. The motor and the reducer drive the left transmission ring to rotate. When the left transmission ring rotates, the power is transmitted to the transmission frame and the connecting ring connected to it through the threaded pin to rotate together, which drives the screen to rotate. The force frame is connected to the right transmission ring through the roller. When the screen rotates, the right transmission ring contacts the roller on the inner side of the force frame and rotates to support it.

[0007] The present invention is further configured as follows: two limit plates are fixedly connected to the outer side of the left transmission ring, the output ends of the motor and the reducer are fixedly connected to a synchronous pulley, the synchronous pulley and the outer side of the left transmission ring are connected through a synchronous transmission belt, and the synchronous transmission belt is arranged between the two limit plates.

[0008] By adopting the above technical solution, a limiting piece is provided to limit the synchronous transmission belt, so that the left transmission ring and the synchronous pulley can form a reasonable belt transmission structure.

[0009] The present invention is further configured as follows: a lead-out frame is installed on the right side of the force-bearing frame, the lead-out frame includes five receiving parts, the outer side of the receiving part is fixedly connected to an assembly frame, the side of the assembly frame close to the force-bearing frame is fixedly connected to the force-bearing frame, the bottom of the receiving part is fixedly connected to a lead-out part, and the setting directions of two adjacent lead-out parts are opposite.

[0010] By adopting the above technical solution, a lead-out rack is set up to receive material particles of different particle sizes. After the material particles fall into the lead-out rack, they will first fall on the inner side of the receiving part and be guided to the required collection position along the lead-out part. The set assembly rack can be used to install the lead-out rack at a certain height. The opposite setting directions of the two adjacent lead-out parts can ensure that there is enough gap between the structures to connect with the collection equipment.

[0011] The present invention is further configured as follows: a discharge pipe is fixedly connected to the right side of the right connecting ring, and the right end of the discharge pipe is located at the top of the receiving portion.

[0012] By adopting the above technical solution, a discharge pipe is provided to discharge material particles of different particle sizes retained in different screens from the discharge pipe, and the discharge position is extended to the top of the corresponding receiving part through the discharge pipe.

[0013] The present invention is further configured as follows: a hammer is sleeved on the outer side of the right conical frame, and the inner side of the hammer is clearance-matched with the conical frame.

[0014] By adopting the above technical solution and setting a hammer, during the continuous rotation of the screen, the hammer on the outside of the conical frame will fall due to gravity and hit the bottom of the inner side of the fixing member and the connecting ring respectively, causing the screen to vibrate. In this process, the particles stuck in the mesh can be shaken off, and the adhering granular materials can be promoted to disperse. When the entire screen vibrates, the screen and the transmission frame will slide relative to the transmission ring along the threaded pin. At this time, the pressure spring will be deformed under force to provide space for the screen to move. At the same time, the rebound of the pressure spring can push the structure to reset.

[0015] The present invention is further configured such that an assembly sleeve is fixedly connected to the inner side of the connecting ring, and the inner side of the assembly sleeve is in contact with the surface of the conical frame.

[0016] By adopting the above technical solution, an assembly sleeve is provided to match the shape of the tapered frame. When the connecting ring and the tapered frame are connected, the tapered frame will contact the inner wall of the assembly sleeve to complete the structural limitation.

[0017] The present invention is further configured as follows: a sub-frame is provided on the outside of the force-bearing frame, an input shell is installed on the inner side of the top of the sub-frame, a control motor is installed on the right side of the input shell, and the output end of the control motor passes through the input shell and is fixedly connected to a spiral rod.

[0018] By adopting the above technical solution, a sub-frame is set up for installing an input shell, and the input shell is used to introduce the plastic raw materials into the inner side of the screen. The material conveying speed can be adjusted by adjusting the speed of the control motor. When the control motor drives the screw rod, it will push the internal material particles to move, and at the same time, continuous stirring will promote the separation of adhering material particles.

[0019] The present invention is further configured as follows: a guide tube is fixedly connected to the bottom of the left side of the input housing, a fan is fixedly connected to the left side of the guide tube, and a partition net is fixedly connected to the inner side of the guide tube.

[0020] By adopting the above technical solution, a guide tube is set up to guide the material particles input from the input shell into the screen. The fan set up can be used to blow the falling particles toward the screen. During the blowing process, the separation of the adhering material particles can be further improved. At the same time, the position inside the input shell is separated by a partition to prevent material particles from leaking from the left side.

[0021] The present invention is further configured as follows: a connecting piece is provided on the left side of the left middle connecting ring and the left side outer connecting ring, and an extension tube is fixedly connected to the left side of the inner connecting ring.

[0022] By adopting the above technical solution, a connecting piece is set to block the material particles falling into the middle and outer screens to prevent them from leaking out of the device from the left side. By setting an extension tube, it can be easily coordinated with the position of the input shell to input materials.

[0023] The present invention is further configured as follows: an input hopper is installed on the top of the input shell, and an external slag hopper is provided on the bottom of the screen.

[0024] By adopting the above technical solution, by providing an input hopper, it is convenient to pour the material particles into the interior of the input shell, and the external slag hopper can be used to receive the material particles that are too small for later recycling and processing.

[0025] Compared with the prior art, the present invention provides a plastic raw material particle screening device with the following beneficial effects: The plastic raw material particle screening device is provided with three groups of screens distributed inside and outside to form three groups of cylindrical shapes. Each group of screens is composed of two mesh cylinders clamped between three connecting rings. The mesh diameter of the outer mesh cylinder is successively smaller than the mesh diameter of the inner mesh cylinder. Therefore, when screening, the plastic raw material particles can be directly input into the inner side of the innermost screen. Since the three groups of screens pass through the connecting rings through the conical frame and are fixed by the fixing parts, the three groups of connecting rings will roll synchronously. While rolling, dynamic particles will pass through the mesh holes. Smaller-sized granular materials will fall on the inner side of the outer screen, while larger-sized granular materials will be retained on the inner side of the current screen and transferred to the right side of the screen during continuous movement, and material particles of different particle sizes will be output from different positions on the right side of the screen. Since the screen is set to be cylindrical, It is surrounded by an effective screening environment, and even if a large amount of material particles are input, they can quickly pass through the mesh cylinder, and according to needs, the conical frame can be disassembled and assembled to install more layers of screens to achieve more accurate screening. When the equipment is installed, the transmission ring can be clamped on the outside of the transmission frame, and the transmission ring and the transmission frame are penetrated by a threaded pin, and the installation is completed by screwing the limit screw sleeve on both ends of the threaded pin. The motor and the reducer drive the left transmission ring to rotate. When the left transmission ring rotates, the power is transmitted to the transmission frame and the connecting ring connected to it through the threaded pin to rotate together, which drives the screen to rotate. The force frame is connected to the right transmission ring through the roller. When the screen rotates, the right transmission ring contacts the roller on the inner side of the force frame and rotates to support it. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of the main structure of the present invention; Figure 2 It is an internal schematic diagram of the main structure of the present invention; Figure 3 Schematic diagram of the structure of the guide tube in the present invention; Figure 4 It is a top schematic diagram of the main structure of the present invention; Figure 5 It is a top view of the local structure of the present invention; Figure 6 It is a rear schematic diagram of the main structure of the present invention; Figure 7 For the present invention Figure 2 A partial enlarged view of point A in the middle; Figure 8 For the present invention Figure 2 A partial enlarged view of point B in the middle.

[0027] In the figure: 1. screen; 101. connecting ring; 102. mesh cylinder; 2. transmission frame; 3. transmission ring; 4. threaded pin; 5. limiting screw sleeve; 6. pressure spring; 7. conical frame; 8. stabilizing member; 9. force frame; 10. roller; 11. frame; 12. motor and reducer; 13. limiting plate; 14. synchronous pulley; 15. lead-out frame; 151. receiving part; 152. assembly frame; 153. lead-out part; 16. discharge pipe; 17. hammer; 18. assembly sleeve; 19. sub-frame; 20. input housing; 21. screw rod; 22. guide pipe; 23. fan; 24. partition; 25. connecting plate; 26. extension pipe. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] Example 1: See also Figure 1-8 , a plastic raw material particle screening device, comprising three sets of screens 1; The screen 1 comprises three connecting rings 101, and a mesh cylinder 102 is fixedly connected between the three connecting rings 101; The right side of the left connecting ring 101 and the left side of the right connecting ring 101 are both fixedly connected to two transmission frames 2. A transmission ring 3 is provided on the outside of the transmission frame 2. A threaded pin 4 is inserted into the inside of the transmission ring 3. The inner side of the transmission frame 2 is plugged into the threaded pin 4. The top and bottom of the threaded pin 4 are both threadedly connected to a limiting screw sleeve 5. Two pressure springs 6 are sleeved on the outside of the threaded pin 4. The two ends of the pressure spring 6 are in contact with the transmission frame 2 and the transmission ring 3 respectively. Four conical frames 7 are inserted into the inner side of the connecting ring 101, and a stabilizing member 8 is provided on the side close to the four conical frames 7. The side of the stabilizing member 8 close to the conical frame 7 is threadedly connected to the conical frame 7. A force-bearing frame 9 is provided on the outer side of the right transmission ring 3. The inner side of the force-bearing frame 9 is rotatably connected to a roller 10. The side of the roller 10 close to the right transmission ring 3 is in contact with the right transmission ring 3. The bottom of the force-bearing frame 9 is fixedly connected to a frame 11. A motor and a reducer 12 are installed on the top of the rear side of the frame 11. The output ends of the motor and the reducer 12 are movably connected to the left transmission ring 3. By setting up three groups of screens 1 distributed inside and outside as three groups of cylindrical shapes, each group of screens 1 is composed of two mesh cylinders 102 clamped between three connecting rings 101, and the mesh diameter of the outer mesh cylinder 102 is successively smaller than the mesh diameter of the inner mesh cylinder 102. Therefore, when screening, the plastic raw material particles can be directly input into the inner side of the innermost screen 1. Since the three groups of screens 1 pass through the connecting ring 101 through the conical frame 7 and are fixed by the fixing member 8, the three groups of connecting rings 101 will roll synchronously. While rolling, dynamic particles will pass through the mesh, and smaller-sized granular materials will fall on the inner side of the outer screen 1, while larger-sized ones will be retained on the inner side of the current screen 1 and transferred to the right side of the screen 1 during continuous movement, and material particles of different particle sizes are output from different positions on the right side of the screen 1. Since the screen 1 is set to be cylindrical, it is effective all around. Screening environment, even if a large amount of material particles are input, the mesh cylinder 102 can be quickly passed through, and according to needs, the conical frame 7 can be disassembled and assembled to install more layers of screen 1 to achieve more accurate screening. When the equipment is installed, the transmission ring 3 can be stuck on the outside of the transmission frame 2, and the transmission ring 3 and the transmission frame 2 are penetrated by the threaded pin 4, and the limiting screw sleeve 5 is screwed on both ends of the threaded pin 4 to complete the installation. The motor and the reducer 12 drive the left transmission ring 3 to rotate. When the left transmission ring 3 rotates, the power is transmitted to the transmission frame 2 and the connecting ring 101 connected thereto through the threaded pin 4 to rotate together, which drives the screen 1 to rotate, and the force frame 9 is connected to the right transmission ring 3 through the roller 10. When the screen 1 rotates, the right transmission ring 3 contacts the roller 10 on the inner side of the force frame 9 and rotates to support it.

[0030] Among them, the outer side of the left transmission ring 3 is fixedly connected to two limit plates 13, the output end of the motor and the reducer 12 is fixedly connected to a synchronous pulley 14, and the synchronous pulley 14 and the outer side of the left transmission ring 3 are connected through a synchronous transmission belt. The synchronous transmission belt is arranged between the two limit plates 13. By setting the limit plates 13, the synchronous transmission belt is limited so that the left transmission ring 3 can form a reasonable belt transmission structure with the synchronous pulley 14. A guide frame 15 is installed on the right side of the force frame 9. The guide frame 15 includes five receiving parts 151. The outer side of the receiving part 151 is fixedly connected to an assembly frame 152. The assembly frame 152 is fixedly connected to the force frame 9 on one side close to the force frame 9. The receiving part 1 The bottom of 51 is fixedly connected with a lead-out portion 153, and the setting directions of the two adjacent lead-out portions 153 are opposite. By setting the lead-out rack 15, it is used to receive material particles of different particle sizes. After the material particles fall into the lead-out rack 15, they will first fall on the inner side of the receiving portion 151 and be guided to the required collection position along the lead-out portion 153. The set assembly rack 152 can be used to install the lead-out rack 15 at a certain height. The setting directions of the two adjacent lead-out portions 153 are opposite so that there is enough gap between the structures to connect with the collection equipment. The right side of the right connecting ring 101 is fixedly connected with a discharge pipe 16. The right end of the discharge pipe 16 is located at the top of the receiving portion 151. By setting the discharge pipe 16, it is used to collect different The material particles of different particle sizes retained in the same screen 1 are discharged from the discharge pipe 16, and their discharge position is extended to the top of the corresponding receiving part 151 through the discharge pipe 16. A hammer 17 is provided on the outer side of the right conical frame 7. The inner side of the hammer 17 and the conical frame 7 are clearance-matched. By setting the hammer 17, during the continuous rotation of the screen 1, the hammer 17 on the outer side of the conical frame 7 will fall due to gravity and hit the bottom of the inner side of the fixing member 8 and the connecting ring 101 respectively, causing the screen 1 to vibrate. In this process, the particles stuck in the mesh can be shaken off, and the adhered granular materials can be promoted to disperse. In the working state, only nearly 10% of the particles at the bottom of the screen 1 are present, but since there is no need to The traditional equipment is not filled at one time, but is continuously input, so that a high working efficiency can be maintained. When the entire screen 1 vibrates, the screen 1 and the transmission frame 2 will slide relative to the transmission ring 3 along the threaded pin 4. At this time, the pressure spring 6 will be deformed by the force to provide displacement space for the screen 1. At the same time, the structure can be pushed to reset by the rebound of the pressure spring 6. The inner side of the connecting ring 101 is fixedly connected with an assembling sleeve 18, and the inner side of the assembling sleeve 18 is fitted with the surface of the conical frame 7. The assembling sleeve 18 is provided to match the shape of the inclination of the conical frame 7. When the connecting ring 101 and the conical frame 7 are connected, the taper of the conical frame 7 will contact the inner wall of the assembling sleeve 18 to complete the position limiting of the structure.

[0031] The working principle of this embodiment is as follows: the motor and reducer 12 are the power sources, and the power is transmitted to the left transmission ring 3 through the synchronous pulley 14 and the synchronous transmission belt. The two limit plates 13 on the outside of the left transmission ring 3 ensure the stability of the belt transmission, and the power is transmitted to the transmission frame 2 through the threaded pin 4, driving the connecting ring 101 and the screen 1 to rotate synchronously. The right transmission ring 3 rotates with the screen 1 under the support of the roller 10 of the force frame 9, forming a stable rotary screening power system. The screen 1 adopts three groups of cylindrical structures, and the aperture of the mesh cylinder 102 decreases from the inside to the outside. After the plastic raw material particles enter the innermost screen 1, they are fully in contact with the mesh surface during the rotation. The particles that meet the aperture pass through the mesh and enter the outer screen 1. The larger particles continue to move in the current screen 1. The particles are separated by particle size through the grading of the three-layer screen 1. In order to solve the problems of particle blockage and adhesion, the hammer 17 on the outside of the right conical frame 7 periodically hits the fixing member 8 and the connecting member due to gravity when rotating with the screen 1. The ring 101 makes the screen 1 vibrate. During the vibration process, the screen 1 and the transmission frame 2 slide relative to each other along the threaded pin 4. The pressure spring 6 rebounds and resets after being deformed by the force, shaking off the mesh particles and promoting the separation of the adhering particles. At the same time, the stirring of the spiral rod 21 of the input system and the purge air flow of the fan 23 further reduce the adhesion. The particles separated at each level move to the right under the action of the rotational force and are accurately discharged through the discharge pipe 16 connected to the right connecting ring 101. The right end of the discharge pipe 16 corresponds to the receiving part 151 of the lead-out frame 15. After the particles of different levels fall into the corresponding receiving part 151, they are transported to the collection equipment through the lead-out part 153. The assembly sleeve 18 on the inside of the connecting ring 101 fits with the surface of the tapered frame 7, and a stable limit is achieved through taper matching. The threaded connection between the fixing member 8 and the tapered frame 7 enhances the structural stability. The combination of the threaded pin 4 and the limiting screw sleeve 5 realizes the detachable connection between the transmission frame 2 and the transmission ring 3, which is convenient for disassembling the tapered frame 7 according to needs to increase or decrease the number of layers of the screen 1.

[0032] Example 2: Based on Example 1, Figure 1-6 A plastic raw material particle screening device also includes a subframe 19, an input housing 20 is installed on the inner side of the top of the subframe 19, a control motor is installed on the right side of the input housing 20, and the output end of the control motor passes through the input housing 20 and is fixedly connected to a screw rod 21; A sub-frame 19 is provided for mounting an input housing 20, which is used to introduce the plastic raw material into the inner side of the screen 1. The speed of the control motor can be adjusted to adjust the material conveying speed. When the control motor drives the screw rod 21, the internal material particles are pushed to move, and at the same time, continuous stirring promotes the separation of the adhering material particles.

[0033] Among them, the bottom of the left side of the input shell 20 is fixedly connected with a guide tube 22, the left side of the guide tube 22 is fixedly connected with a fan 23, and the inner side of the guide tube 22 is fixedly connected with a partition 24. The guide tube 22 is provided to guide the material particles input by the input shell 20 into the screen 1. The fan 23 provided can be used to blow the falling particles toward the screen 1, and the separation of the adhering material particles can be further improved during the blowing process. At the same time, the position inside the input shell 20 is separated by the partition 24 to prevent the material particles from leaking from the left side. The left middle connecting ring 101 and the left outer connecting ring 10 1 is provided with a connecting piece 25 on the left side, and an extension tube 26 is fixedly connected to the left side of the inner connecting ring 101. The connecting piece 25 is provided to block the material particles falling into the middle and outer screens 1 to prevent them from leaking out of the device from the left side. By providing the extension tube 26, it is convenient to cooperate with the position of inputting materials into the input shell 20. An input bucket is installed on the top of the input shell 20, and an external slag bucket is provided at the bottom of the screen 1. By providing the input bucket, the material particles can be easily dumped into the interior of the input shell 20. The external slag bucket can be used to receive material particles that are too small for later recycling and processing.

[0034] Working principle of this embodiment: The input shell 20 installed on the inner side of the top of the sub-frame 19 is responsible for the material introduction function. The input hopper on the top is convenient for pouring plastic raw material particles into it. The control motor on the right side of the input shell 20 drives the screw rod 21 to rotate. By adjusting the speed of the control motor, the material conveying speed can be accurately controlled. The screw rod 21 promotes the separation of adhered particles by continuously stirring while pushing the material particles to move. The guide pipe 22 at the bottom left of the input shell 20 accurately guides the material into the screen 1. The fan 23 on the left side of the guide pipe 22 generates a purge airflow to the bottom. The falling particles are blown toward the screen 1, further improving the separation effect of the adhering particles. The partition 24 on the inner side of the guide tube 22 effectively blocks the material particles from leaking out from the left side. The connecting piece 25 of the middle and outer connecting ring 101 on the left side blocks the particles falling into the middle and outer screens 1, preventing them from leaking out from the left side of the device. The extension tube 26 on the left side of the inner connecting ring 101 is precisely matched with the material input position of the input shell 20 to ensure that the material enters the screening area smoothly, and the external slag bucket provided at the bottom of the screen 1 is used to receive small particles for later recycling and processing.

[0035] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed. Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A plastic raw material particle screening device, comprising three sets of screens (1), characterized in that; The screen (1) comprises three connecting rings (101), and a mesh cylinder (102) is fixedly connected between the three connecting rings (101); The right side of the left connecting ring (101) and the left side of the right connecting ring (101) are both fixedly connected to two transmission frames (2), the outer side of the transmission frame (2) is provided with a transmission ring (3), the inner side of the transmission ring (3) is plugged with a threaded pin (4), the inner side of the transmission frame (2) and the threaded pin (4) are plugged, the top and bottom of the threaded pin (4) are both threadedly connected to a limiting screw sleeve (5), the outer side of the threaded pin (4) is provided with two pressure springs (6), and the two ends of the pressure spring (6) are in contact with the transmission frame (2) and the transmission ring (3) respectively; Four conical frames (7) are inserted into the inner side of the connecting ring (101), and a stabilizing member (8) is provided on the side close to the four conical frames (7). The side of the stabilizing member (8) close to the conical frame (7) is threadedly connected to the conical frame (7). A force frame (9) is provided on the outer side of the right transmission ring (3). The inner side of the force frame (9) is rotatably connected to a roller (10). The side of the roller (10) close to the right transmission ring (3) is in contact with the right transmission ring (3). The bottom of the force frame (9) is fixedly connected to the frame (11). A motor and a reducer (12) are installed on the top of the rear side of the frame (11). The output ends of the motor and the reducer (12) are movably connected to the left transmission ring (3).

2. The plastic raw material particle screening device according to claim 1, characterized in that: Two limit plates (13) are fixedly connected to the outer side of the left transmission ring (3), and the output ends of the motor and the reducer (12) are fixedly connected to a synchronous pulley (14). The synchronous pulley (14) and the outer side of the left transmission ring (3) are connected through a synchronous transmission belt, and the synchronous transmission belt is arranged between the two limit plates (13).

3. The plastic raw material particle screening device according to claim 1, characterized in that: A guide frame (15) is installed on the right side of the force-bearing frame (9), and the guide frame (15) includes five receiving parts (151). The outer sides of the receiving parts (151) are fixedly connected to an assembly frame (152). The side of the assembly frame (152) close to the force-bearing frame (9) is fixedly connected to the force-bearing frame (9). The bottom of the receiving part (151) is fixedly connected to a guide portion (153), and the setting directions of two adjacent guide portions (153) are opposite.

4. The plastic raw material particle screening device according to claim 3, characterized in that: A discharge pipe (16) is fixedly connected to the right side of the right connecting ring (101), and the right end of the discharge pipe (16) is located at the top of the receiving portion (151).

5. The plastic raw material particle screening device according to claim 1, characterized in that: The outer side of the right conical frame (7) is sleeved with a hammer (17), and the inner side of the hammer (17) and the conical frame (7) are clearance-matched.

6. The plastic raw material particle screening device according to claim 1, characterized in that: An assembly sleeve (18) is fixedly connected to the inner side of the connecting ring (101), and the inner side of the assembly sleeve (18) is in contact with the surface of the conical frame (7).

7. The plastic raw material particle screening device according to claim 1, characterized in that: A sub-frame (19) is provided on the outside of the force-bearing frame (9), an input housing (20) is installed on the inside of the top of the sub-frame (19), a control motor is installed on the right side of the input housing (20), and an output end of the control motor passes through the input housing (20) and is fixedly connected to a screw rod (21).

8. The plastic raw material particle screening device according to claim 7, characterized in that: A guide tube (22) is fixedly connected to the bottom of the left side of the input housing (20), a fan (23) is fixedly connected to the left side of the guide tube (22), and a partition net (24) is fixedly connected to the inner side of the guide tube (22).

9. The plastic raw material particle screening device according to claim 8, characterized in that: The left sides of the left middle connecting ring (101) and the left outer connecting ring (101) are both provided with connecting pieces (25), and the left side of the inner connecting ring (101) is fixedly connected with an extension tube (26).

10. The plastic raw material particle screening device according to claim 7, characterized in that: An input hopper is installed on the top of the input housing (20), and an external slag hopper is provided at the bottom of the screen (1).

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