Plastic particle conveying device with sieving function
By combining the design of wave-shaped flexible side baffles and power-driven screen cylinder, the problem of plastic granules getting stuck during the conveying process is solved, achieving efficient screening and preventing material jamming, thereby improving production efficiency and economic benefits.
Patent Information
- Application Number
- CN202522017609.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-19
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-09-19
AI Technical Summary
Plastic granules are prone to slipping from the side during the conveying process due to equipment vibration or tilt angle, causing material jamming. Existing technologies have not been able to effectively solve the problem of tiny particles accumulating in gaps to form 'particle bridges', which affects production efficiency and cost.
The structure employs a wave-shaped flexible side guard and a power-driven screen cylinder. By dynamically adjusting the gap between the side plate and the conveyor belt, particles are prevented from slipping off. The screen cylinder is used for pre-screening to remove debris or substandard particles with insufficient diameter.
It effectively reduces material jamming, improves production continuity, lowers maintenance costs, and increases production efficiency. The waste screening efficiency reaches 95%, the number of downtimes per year is reduced, and the production efficiency is increased by 7%.
Smart Images
Figure CN224677151U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of plastic granulation conveying and screening technology, and more specifically, to a plastic granule conveying device with screening function. Background Technology
[0002] In the production of plastic granules, the problem of material jamming on conveyor belt side plates has long plagued the industry. Due to the small size and high fluidity of plastic granules, they easily slip from the sides during transport due to equipment vibration or tilting. Traditional solutions often use fixed side plates for blocking. However, the gap between the side plate and the conveyor belt becomes a "trap" for granules with insufficient diameter. Especially when debris or defective granules get stuck, they accumulate and cause blockages, sometimes even leading to the conveyor belt stopping completely. Statistics show that this problem can reduce production line efficiency by 5%-8%, with a single conveyor line experiencing 20-30 shutdowns per year due to material jamming, directly impacting production capacity and cost control.
[0003] While existing improvement technologies attempt to alleviate the problem through sealing strips or adjusting side plate positions, they all have significant drawbacks. Static sealing strips are prone to wear and detachment due to the thermal expansion and contraction of the conveyor belt, while dynamic adjustment solutions are limited in effectiveness due to high mechanical complexity and slow response speed. Negative pressure adsorption or purging devices, which some companies have tried, are difficult to promote due to high energy consumption and cleaning efficiency of less than 60%. More importantly, none of these solutions solve the fundamental problem of tiny particles accumulating in gaps and forming "particle bridges," resulting in high maintenance costs and downtime.
[0004] To address the aforementioned pain points, the industry urgently needs an anti-jamming technology that requires no external power, has a simple structure, and possesses self-adaptive capabilities. The ideal solution should achieve dynamic adjustment of the gap between the side plates and the conveyor belt through a passive structure, reducing frictional resistance; simultaneously, it should have a particle guiding function, directing particles stuck in the gaps to the center of the conveyor belt to prevent accumulation. Furthermore, the new technology must balance wear resistance and ease of maintenance, effectively improving production continuity and economic efficiency while reducing material loss. Utility Model Content
[0005] Based on the above problems, this application proposes a plastic granule conveying device with screening function to solve the technical problem that plastic granules are small in size and highly mobile, and are prone to slipping off the side due to equipment vibration or tilt angle during conveying.
[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A plastic pellet conveying device with screening function includes a feeding structure, which is installed on the ground via side plates. A conveyor belt adapted to the feeding structure is provided on the front side of the feeding structure. Flexible side guards are provided on both sides of the conveyor belt, and the side guards are wavy. A crossbar is horizontally arranged on the conveyor belt. A screening structure is provided at the front section of the conveyor belt. The screening structure is installed on the ground via a bracket. A discharge trolley is provided below the screening structure.
[0007] In one specific implementation, the feeding structure includes a feeding hopper mounted on the side plate, the feeding hopper being rotatably connected to the side plate, telescopic rods being provided on both sides of the feeding hopper, and a first connecting rod and a second connecting rod being provided on both sides of the feeding hopper. The two ends of the telescopic rods are rotatably connected to the side plate and the first connecting rod, respectively. The two ends of the first connecting rods are fixedly connected to the feeding hopper, and one end of the first connecting rod is rotatably connected to the feeding hopper. The two ends of the second connecting rods are fixedly connected to the feeding hopper, and one end of the second connecting rod is rotatably connected to the feeding hopper.
[0008] In one specific implementation, the screening structure includes a screen cylinder mounted on the support, with pulleys for the screen cylinder to roll at each of the four corners of the support, and a fixed roller at one end of the screen cylinder, which is slidably connected to the screen cylinder.
[0009] In one specific implementation scheme, a power motor for the rotation of the screen cylinder is provided on one side of the support, a gear is provided on the power output shaft of the power motor, and a gear ring that meshes with the gear is provided on the screen cylinder.
[0010] In one specific implementation, a feeding plate is provided between the screen cylinder and the conveyor belt, and the opening of the feeding plate at the end near the conveyor belt is larger than the opening at the end near the screen cylinder.
[0011] In one specific implementation, a storage bin is provided on the support frame, the storage bin is located below the screen cylinder, the upper part of the storage bin has a feed inlet adapted to the screen cylinder, and the lower part of the storage bin has a discharge outlet adapted to the discharge vehicle.
[0012] In one specific implementation, the discharge vehicle includes a frame, wheels mounted on the frame, handlebars mounted on the frame, and a compartment adapted to the discharge port mounted on the frame.
[0013] The positive effects of this utility model are: A screening structure is installed at the front of the conveyor belt. The screen cylinder is driven by a motor to rotate, and the plastic granules are pre-screened using the meshing of a toothed ring and gears. The screen cylinder screens out the small-diameter debris or substandard granules, preventing them from entering subsequent processes and fundamentally reducing the source of unqualified plastic granules.
[0014] The wave-shaped structure is set on both sides of the conveyor belt. Compared with the traditional fixed side plates, it can better adapt to the dynamic deformation of the conveyor belt (such as thermal expansion and contraction or vibration), avoid the gap between the side plates and the conveyor belt, and prevent particles from slipping or getting stuck in the gap. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of this application 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 embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.
[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of this utility model from another angle; Figure 3 This is a schematic diagram of the feeding structure of this utility model; Figure 4 This is a schematic diagram of another state of the feeding structure of this utility model; Figure 5 This is a schematic diagram of the conveyor belt structure of this utility model; Explanation of reference numerals in the attached figures 1. Side plate; 2. Conveyor belt; 3. Side guard; 4. Crossbar; 5. Support frame; 6. Feed hopper; 7. Telescopic rod; 8. First connecting rod; 9. Second connecting rod; 10. Screen cylinder; 11. Fixed roller; 12. Pulley; 13. Power motor; 14. Gear; 15. Gear ring; 16. Feeding plate; 17. Storage bin; 18. Car compartment; 19. Handlebar; 20. Wheel. Detailed Implementation
[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Example
[0018] This embodiment provides a plastic granule conveying device with screening function, including a feeding structure, a side plate 1, a conveyor belt 2, a flexible side baffle 3, a crossbar 4, a screening structure, a conveying plate 16, a storage bin 17, and a discharge vehicle.
[0019] The feeding structure is fixed to the ground by a side plate 1. The feeding structure includes a feeding hopper 6 installed on the side plate 1. The feeding hopper 6 is rotatably connected to the side plate 1. Telescopic rods 7 are provided on both sides of the feeding hopper 6. A first connecting rod 8 and a second connecting rod 9 are provided on both sides of the feeding hopper 6. The two ends of the telescopic rod 7 are rotatably connected to the side plate 1 and the first connecting rod 8, respectively. The two ends of the first connecting rod 8 are fixedly connected to the feeding hopper 6. One end of the first connecting rod 8 is rotatably connected to the feeding hopper 6. The two ends of the second connecting rod 9 are fixedly connected to the feeding hopper 6. One end of the second connecting rod 9 is rotatably connected to the feeding hopper 6.
[0020] The support frame 5 supports the screen cylinder 10 (stainless steel mesh, 2mm aperture) via pulleys 12. One end of the screen cylinder 10 is slidably connected to a fixed roller 11 (nylon material). A power motor 13 is installed on the side of the support frame 5, and the motor shaft meshes with the gear ring 15 on the outer wall of the screen cylinder 10 via gear 14. The feed plate 16 has an opening width of 30cm at the two ends near the conveyor belt and 20cm at the end near the screen cylinder 10, gradually narrowing in shape. The storage bin 17 is located below the screen cylinder 10, with the upper feed inlet aligned with the screen cylinder 10 and the lower discharge outlet adapted to the compartment 18 of the discharge trolley (a frame with wheels 20 and handles 19).
[0021] The corrugated flexible side plate 3 adapts to the thermal expansion and contraction of the conveyor belt 2 through elastic deformation, and the gap is dynamically adjusted to 0.5-1mm, reducing the amount of debris stuck by 80% and solving the problem of plastic particles getting stuck between the conveyor belt and the side plate 1. The screen cylinder 10 is driven by the power motor 13 (speed 30rpm), and the debris screening efficiency reaches 95%, reducing the average number of downtimes per year from 20-30 times to 3 times, and increasing production efficiency by 7%.
[0022] The telescopic rod 7 drives the first connecting rod 8, which in turn causes the feeding hopper 6 to adjust its angle slightly. The side baffle 3 and the conveyor belt 2 prevent debris from getting stuck. At the same time, the wave-shaped structure of the side baffle 3 forms a guide surface, and the particles stuck in the gap are guided to the center of the conveyor belt 2.
[0023] The conveyor belt 2 feeds the material into the screen cylinder 10 via the conveyor plate 16 (gradually narrowing design). When the screen cylinder 10 rotates, qualified particles (>2mm) fall into the storage bin 17, while debris (<2mm) is discharged through the screen, thus avoiding debris from mixing into the main material and causing problems in subsequent processes.
[0024] The discharge vehicle includes a frame, on which wheels 20 are mounted, and handlebars 19 are mounted. A compartment 18 adapted to the discharge port is also mounted on the frame. The discharged plastic granules can be removed via the discharge vehicle. Example
[0025] This embodiment optimizes some structures based on Embodiment 1, as follows: The telescopic rod 7 can be replaced with an electric push rod (for higher precision), the fixed roller 11 of the screen cylinder 10 can be changed to an adjustable type (position adjusted via bolts), and the number of pulleys 12 can be increased to 6 (evenly distributed). Two pulleys 12 can be located in the middle of the screen cylinder 10, and a slide rail adapted to the two pulleys 12 can be installed in the middle. The power motor 13 can be changed to a variable frequency motor (supporting speed adjustment from 5-50 rpm). The surface is covered with a Teflon coating (to reduce friction), and the opening taper angle is adjusted from 15° to 10° for smoother material flow. A weighing sensor is added to the bottom of the compartment 18 (to monitor the loading amount in real time).
[0026] The electric push rod adjusts the angle of the feeding hopper more precisely, thus controlling the feeding speed more accurately and reducing the amount of debris stuck. The Teflon-coated conveyor plate reduces material residue, and the weighing sensor prevents overloading of the discharge trolley, significantly reducing equipment maintenance costs.
[0027] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0028] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A plastic granule conveying device with screening function, characterized in that, The system includes a feeding structure, which is installed on the ground via a side plate (1). A conveyor belt (2) adapted to the feeding structure is provided on the front side of the feeding structure. Flexible side guards (3) are provided on both sides of the conveyor belt (2). The side guards (3) are wavy. A crossbar (4) is horizontally placed on the conveyor belt (2). A screening structure is provided at the front section of the conveyor belt (2). The screening structure is installed on the ground via a bracket (5). A discharge vehicle is provided below the screening structure.
2. The plastic granule conveying device with screening function according to claim 1, characterized in that, The feeding structure includes a feeding hopper (6) installed on the side plate (1). The feeding hopper (6) is rotatably connected to the side plate (1). Telescopic rods (7) are provided on both sides of the feeding hopper (6). A first connecting rod (8) and a second connecting rod (9) are provided on both sides of the feeding hopper (6). The two ends of the telescopic rod (7) are rotatably connected to the side plate (1) and the first connecting rod (8) respectively. The two ends of the first connecting rod (8) are fixedly connected to the feeding hopper (6). One end of the first connecting rod (8) is rotatably connected to the feeding hopper (6). The two ends of the second connecting rod (9) are fixedly connected to the feeding hopper (6). One end of the second connecting rod (9) is rotatably connected to the feeding hopper (6).
3. The plastic granule conveying device with screening function according to claim 1, characterized in that, The screening structure includes a screen cylinder (10) mounted on the support (5). Each of the four corners of the support (5) is provided with a pulley (12) for the screen cylinder (10) to roll. One end of the screen cylinder (10) is provided with a fixed roller (11), and the fixed roller (11) is slidably connected to the screen cylinder (10).
4. A plastic granule conveying device with screening function according to claim 3, characterized in that, A power motor (13) for rolling the screen cylinder (10) is provided on one side of the support (5). A gear (14) is provided on the power output shaft of the power motor (13). A toothed ring (15) that meshes with the gear (14) is provided on the screen cylinder (10).
5. A plastic granule conveying device with screening function according to claim 3, characterized in that, A conveying plate (16) is provided between the screen cylinder (10) and the conveyor belt (2), and the opening of the conveying plate (16) at the end near the conveyor belt (2) is larger than the opening at the end near the screen cylinder (10).
6. A plastic granule conveying device with screening function according to claim 5, characterized in that, The support (5) is provided with a storage bin (17), which is located below the screen cylinder (10). The upper part of the storage bin (17) is provided with a feed inlet that is compatible with the screen cylinder (10), and the lower part of the storage bin (17) is provided with a discharge port that is compatible with the discharge vehicle.
7. A plastic granule conveying device with screening function according to claim 6, characterized in that, The discharge vehicle includes a frame, on which wheels (20) are mounted, on which handles are mounted, and on which a compartment (18) adapted to the discharge port is mounted.