Screening device for PBT production
By introducing a dust collection system and a vibrating motor structure into the screening device, the problems of dust and impurity removal and multi-stage screening of PBT particles are solved, achieving efficient dust removal and multi-stage screening, and improving the cleanliness of PBT particles and screening efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU HESHILI NEW MATERIAL
- Filing Date
- 2025-06-05
- Publication Date
- 2026-05-19
AI Technical Summary
Existing screening devices are unable to effectively remove dust and impurities adhering to PBT particles when screening them, affecting the cleanliness of the particles and the impurity removal effect. At the same time, they are difficult to achieve multi-stage screening, resulting in low screening efficiency.
A screening device for PBT production was designed. It adopts a dust collection system that uses a discharge pipe and a dust collection box combined with a vibrating motor and a spring structure to remove dust and impurities, and performs multi-stage screening through two-stage screens.
It effectively removes dust and impurities from PBT particles, improving particle cleanliness and impurity removal efficiency, while also enabling multi-stage screening and increasing screening efficiency.
Smart Images
Figure CN224255813U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of ultra-lightweight and high-elasticity foamed PBT copolyester research and development technology, specifically a screening device for PBT production. Background Technology
[0002] Ultra-lightweight, high-elasticity foamed PBT copolyester has excellent mechanical properties, electrical properties, fatigue resistance, heat aging resistance and solvent resistance, and is easy to process and modify. It is one of the world's five major general-purpose engineering plastics. Screening devices are required during the screening process of PBT granules.
[0003] A Chinese patent with authorization announcement number CN 211164811 U discloses a granular screening device for flame-retardant PBT production, relating to the field of material processing technology. This invention includes an outer chamber, with a fixed plate fixedly installed on the top of the inner wall of the outer chamber. A filter cylinder is fixedly installed at the bottom of the fixed plate, and screening holes are provided on the side walls and bottom of the filter cylinder. A feed hopper communicating with the fixed plate is fixedly through the top of the outer chamber. A rotating shaft penetrating into the filter cylinder is rotatably connected to the center of the fixed plate. A drive device for the rotating shaft is fixed at the bottom of the outer chamber, and a fixed frame is fixed at the bottom of the rotating shaft. A dispersing plate is detachably fixed to the fixed frame by bolts. This invention drives the dispersing plate to rotate via the drive device, centrifugally dispersing the material in the filter cylinder, thereby breaking up agglomerated granules and simultaneously completing centrifugal screening. Small-diameter granules are squeezed into the gaps during the rotation of the dispersing plate, thus forming rapid screening with the screening holes of the filter cylinder. The airflow blown in by the fan can remove a large amount of heat, further preventing granule agglomeration and significantly improving the granule screening efficiency.
[0004] Existing screening devices struggle to remove dust and impurities adhering to PBT particles during the screening process, which can affect the cleanliness of the PBT particles and result in poor impurity removal efficiency. Therefore, a screening device for PBT production is proposed to address the above issues. Utility Model Content
[0005] In order to overcome the shortcomings of the existing technology and solve the problems existing in the existing technology, this utility model proposes a screening device for PBT production.
[0006] The technical solution adopted by this utility model to solve its technical problem is a screening device for PBT production, including a screen box. Three discharge hoppers are installed on the side wall of the screen box, and discharge pipes are installed on the discharge hoppers. A cavity is opened inside the side wall of the discharge pipe, and multiple dust suction holes are opened on the inner wall of the discharge pipe. A flexible hose is connected to the side wall of the discharge pipe, and a guide tube is installed at the other end of the flexible hose. The other end of the guide tube is connected to a dust collection box. A dust collection container is placed inside the dust collection box, and a handle is installed on the outer wall of the dust collection box. A filter plate is installed on the side wall of the dust collection box, and an exhaust box is installed on the side wall of the dust collection box. Exhaust slots are provided on the two side walls and the side wall of the dust collection box. A drive motor is installed in the exhaust box via a base. A rotor is installed on the output shaft of the drive motor, and fan blades are installed on the rotor. As the PBT particles pass through the discharge pipe, the dust and impurities attached to the PBT particles are sucked into the cavity along with the air, and then enter the dust collection box. The dust and impurities are intercepted by the filter plate on the side wall of the dust collection box, and clean air is discharged from the exhaust slots. This removes the dust and impurities attached to the PBT particles, which helps to improve the cleanliness of the PBT particles and improves the impurity removal effect of the device.
[0007] Preferably, a base is installed below the sieve box, and the base is fixedly connected to the dust collection box. A support frame is installed on the base, and four springs are installed on the support frame. A connecting block is fixedly connected to the other end of each spring, and the connecting block is fixedly connected to the side wall of the sieve box. A control panel is installed on the side wall of the sieve box, and a fixed seat is installed on the support frame. Two vibration motors are installed on the fixed seat, and the output shafts of the vibration motors are connected to the sieve box through a flexible coupling. A feed inlet is opened on the top side of the sieve box, and a first screen, a second screen, and a guide plate are installed on the inner wall of the sieve box. By pouring PBT particles into the sieve box through the feed inlet, the two vibration motors operate, and the springs cooperate to make the sieve box reciprocate. The PBT particles are screened through the first screen and the second screen in two stages, so that the PBT particles are screened into three sizes of PBT particles. Finally, the PBT particles are discharged from the discharge pipe. This structure can perform multi-stage screening of PBT particles, which is beneficial to improving screening efficiency.
[0008] The advantages of this utility model are:
[0009] 1. This utility model utilizes the process where, during the discharge pipe process, dust and impurities attached to PBT particles are sucked into the cavity along with air, and then enter the dust collection box of the dust collection chamber. The dust and impurities are intercepted by the filter plate on the side wall of the dust collection box, while clean air is discharged from the exhaust groove. This achieves the removal of dust and impurities attached to the PBT particles, which is beneficial to improving the cleanliness of the PBT particles and enhancing the impurity removal effect of the device.
[0010] 2. This utility model uses two vibrating motors and springs to make the screen box vibrate back and forth. The PBT particles are screened through the first screen and the second screen in two stages, so that the PBT particles are screened into three sizes of PBT particles. Finally, the PBT particles are discharged from the discharge pipe. This structure can perform multi-stage screening of PBT particles, which is beneficial to improving screening efficiency. Attached Figure Description
[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0012] Figure 1 This is a first-person perspective 3D structural diagram;
[0013] Figure 2 This is a schematic diagram of the internal three-dimensional structure of the discharge pipe;
[0014] Figure 3 This is a three-dimensional structural diagram of the dust collection box.
[0015] Figure 4 This is a schematic diagram of the three-dimensional structure of the sieve box;
[0016] Figure 5 This is a schematic diagram of the internal three-dimensional structure of the sieve box.
[0017] In the diagram: 1. Screen box; 2. Discharge hopper; 3. Discharge pipe; 4. Cavity; 5. Dust suction hole; 6. Hose; 7. Conduit; 8. Dust suction box; 9. Dust suction container; 10. Exhaust box; 11. Exhaust trough; 12. Drive motor; 13. Rotor; 14. Fan blade; 15. Base; 16. Support frame; 17. Spring; 18. Connecting block; 19. Control panel; 20. Fixing seat; 21. Vibration motor; 22. Feed inlet; 23. First screen; 24. Second screen; 25. Guide plate. Detailed Implementation
[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.
[0019] Please see Figure 1-3As shown, a screening device for PBT production includes a screen box 1. Three discharge hoppers 2 are installed on the side wall of the screen box 1. Discharge pipes 3 are installed on the discharge hoppers 2. A cavity 4 is formed inside the side wall of the discharge pipe 3. Multiple dust suction holes 5 are formed on the inner wall of the discharge pipe 3. A flexible hose 6 is connected to the side wall of the discharge pipe 3. A guide tube 7 is installed at the other end of the flexible hose 6. The other end of the guide tube 7 is connected to a dust collection box 8. A dust collection container 9 is placed inside the dust collection box 8. A handle is installed on the outer wall of the dust collection container 9. A filter plate is installed on the side wall of the dust collection box 9. An exhaust fan is installed on the side wall of the dust collection box 8. 10. Exhaust slots 11 are provided on the two side walls of the exhaust box 10 and the side wall of the dust collection box 8. A drive motor 12 is installed inside the exhaust box 10 via a base. A rotor 13 is installed on the output shaft of the drive motor 12, and fan blades 14 are installed on the rotor 13. During operation, existing screening devices have difficulty removing dust and impurities adhering to PBT particles during the screening process, which easily affects the cleanliness of the PBT particles and results in poor impurity removal effect of the device. By pouring PBT particles into the screening box 1 from the feed inlet 22, The sieve box 1 sieves PBT particles, and PBT particles of different sizes are discharged from the discharge pipes 3 on the three discharge hoppers 2. As the PBT particles pass through the discharge pipes 3, the drive motor 12 operates, driving the rotor 13 to rotate at high speed. The rotor 13 drives the fan blades 14 to rotate at high speed, causing the air inside the cavity 4 of the exhaust box 10, the dust collection box 8, the duct 7, the three hoses 6, and the three discharge pipes 3 to be instantly discharged from the exhaust slot 11. The cavity 4 of the exhaust box 10, the dust collection box 8, the duct 7, the three hoses 6, and the three discharge pipes 3 is then discharged. There is a pressure difference between the inside and the outside. Under the action of the pressure difference, the dust and impurities attached to the PBT particles are sucked into the cavity 4 along with the air. Then, they enter the hose 6 from the cavity 4, then the duct 7 from the hose 6, and finally the dust collection box 9 of the dust collection box 8 from the duct 7. The dust and impurities are intercepted by the filter plate on the side wall of the dust collection box 9, and the clean air is discharged from the exhaust channel 11. This removes the dust and impurities attached to the PBT particles, which helps to improve the cleanliness of the PBT particles and improve the impurity removal effect of the device.
[0020] Please see Figure 4-5As shown, a base 15 is installed below the screen box 1, and the base 15 is fixedly connected to the dust collection box 8. A support frame 16 is installed on the base 15, and four springs 17 are installed on the support frame 16. A connecting block 18 is fixedly connected to the other end of the springs 17, and the connecting block 18 is fixedly connected to the side wall of the screen box 1. A control panel 19 is installed on the side wall of the screen box 1. A fixed seat 20 is installed on the support frame 16, and two vibration motors 21 are installed on the fixed seat 20. The output shaft of the vibration motor 21 is connected to the screen box 1 through a flexible coupling. A feed inlet 22 is opened on the top side of the screen box 1, and a first screen 23 and a second screen 24 are installed on the inner wall of the screen box 1. 4 and guide plate 25; During operation, existing screening devices have difficulty performing multi-stage screening of PBT particles, resulting in low screening efficiency. By pouring PBT particles into the screen box 1 from the feed inlet 22, the screen box 1 is vibrated by two vibrating motors 21 and spring 17. The PBT particles pass through the first screen 23 and the second screen 24 for two-stage screening, resulting in PBT particles being screened into three sizes. Finally, the PBT particles are discharged from the discharge pipe 3. This structure can perform multi-stage screening of PBT particles, which is beneficial to improving screening efficiency.
[0021] Working principle: Existing screening devices struggle to remove dust and impurities adhering to PBT granules during screening, easily affecting the cleanliness of the granules and resulting in poor impurity removal. By pouring PBT granules into the screening box 1 through the feed inlet 22, the screening box 1 screens the granules, and granules of different sizes are discharged from the discharge pipes 3 on the three discharge hoppers 2. As the PBT granules pass through the discharge pipes 3, the drive motor 12 operates, driving the rotor 13 to rotate at high speed. The rotor 13 drives the fan blades 14 to rotate at high speed, causing the air inside the cavities 4 of the exhaust box 10, dust collection box 8, duct 7, three hoses 6, and three discharge pipes 3 to be instantly discharged from the exhaust trough 11. A pressure difference exists between the cavity 4 of the exhaust box 10, dust collection box 8, duct 7, three hoses 6, and three discharge pipes 3 and the outside environment. Under the action of this pressure difference, dust and impurities adhering to the PBT granules are sucked into the cavity 4 along with the air, and then discharged from the exhaust trough 11. The air cavity 4 enters the hose 6, then the hose 6 enters the conduit 7, and then the conduit 7 enters the dust collection box 9 of the dust collection box 8. Dust and impurities are intercepted by the filter plate on the side wall of the dust collection box 9, and clean air is discharged from the exhaust groove 11. This removes the dust and impurities attached to the PBT particles, which helps to improve the cleanliness of the PBT particles and the impurity removal effect of the device. Existing screening devices have difficulty in performing multi-stage screening of PBT particles, resulting in low screening efficiency. By pouring PBT particles into the screen box 1 from the feed port 22, the screen box 1 is vibrated by two vibrating motors 21 and spring 17. The PBT particles pass through the first screen 23 and the second screen 24 for two-stage screening, resulting in PBT particles being screened into three sizes. Finally, the PBT particles are discharged from the discharge pipe 3. This structure can perform multi-stage screening of PBT particles, which helps to improve screening efficiency.
[0022] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.
Claims
1. A screening device for PBT production, characterized by: The system includes a sieve box (1), on which three discharge hoppers (2) are installed. A discharge pipe (3) is installed on each discharge hopper (2). A cavity (4) is opened inside the side wall of the discharge pipe (3). Multiple dust suction holes (5) are opened on the inner wall of the discharge pipe (3). A flexible hose (6) is connected to the side wall of the discharge pipe (3). A conduit (7) is installed at the other end of the flexible hose (6). A dust collection box (8) is connected to the other end of the conduit (7). A dust collection device is placed inside the dust collection box (8). The dust collection box (9) has a handle installed on its outer wall, a filter plate installed on its side wall, an exhaust box (10) installed on its side wall, an exhaust groove (11) opened on the two side walls of the exhaust box (10) and the side wall of the dust collection box (8), a drive motor (12) is installed in the exhaust box (10) through a base, a rotor (13) is installed on the output shaft of the drive motor (12), and a fan blade (14) is installed on the rotor (13).
2. The screening device for PBT production according to claim 1, characterized in that: A base (15) is installed below the sieve box (1), the base (15) is fixedly connected to the dust collection box (8), and a support frame (16) is installed on the base (15).
3. The screening device for PBT production according to claim 2, characterized in that: Four springs (17) are installed on the support frame (16), and a connecting block (18) is fixedly connected to the other end of the springs (17).
4. The screening device for PBT production according to claim 3, characterized in that: The connecting block (18) is fixedly connected to the side wall of the sieve box (1), and a control panel (19) is installed on the side wall of the sieve box (1).
5. The screening device for PBT production according to claim 2, characterized in that: A fixed seat (20) is installed on the support frame (16), and two vibration motors (21) are installed on the fixed seat (20). The output shaft of the vibration motor (21) is connected to the screen box (1) through a flexible coupling.
6. The screening device for PBT production according to claim 1, characterized in that: The screen box (1) has a feed inlet (22) on the top side, and a first screen (23), a second screen (24) and a guide plate (25) are installed on the inner wall of the screen box (1).