Dual-decked screened plastic recycling screening device

Abstract

The utility model discloses a double -deck screening's plastic recycling screening device, especially relates to the field of plastic recycling, including screening casing, is equipped with one feeding hopper, a plurality of side discharge gates and a bottom discharge gate on screening casing, and the double -deck conical screen is slidably connected in screening casing, and a plurality of connecting assemblies are installed between double -deck conical screen and screening casing, and the bottom fixed connection of screening casing is limited the cylinder, and the vibration assembly is installed on screening casing, and the output of vibration assembly is connected with slide column, and slide column is slidably connected in the limited cylinder, and vibration assembly is used for driving slide column and moves along the limited cylinder, and the top fixed connection of slide column is conical head, the utility model discloses the double -deck conical screen of arranging coaxially and the aperture is big from top to bottom and the conical head matching with its taper under the drive of vibration assembly carries out directional knock, makes material and fully utilizes gravity automatic dispersion on conical screen surface, and flows smoothly, and screening efficiency and precision improve greatly, avoids material accumulation and screen hole blockage.

Description

Technical Field

[0001] This utility model relates to the field of plastic recycling technology, and more specifically, to a plastic recycling screening device with double-layer screening. Background Technology

[0002] Plastic recycling screening devices are specialized equipment used to sort and purify waste plastics. Through technologies such as vibrating screening, spectral recognition, or mechanical separation, mixed plastics are classified according to material, particle size, or density. Their core function is to improve recycling efficiency and resource purity. They not only reduce manual sorting errors but also regenerate the processed plastics into high-quality granules, reducing raw material costs and environmental pollution. They are a key technological support for the circular economy.

[0003] Traditional plastic recycling screening devices generally use flat or single-layer screen structures. Due to their simple screen structure, they lack an effective material guiding and distribution mechanism. The incoming plastic material is very easy to accumulate on the screen surface and is difficult to disperse evenly. More importantly, these devices are usually not equipped with effective real-time cleaning devices. When processing plastics containing a lot of fine particles or fibrous impurities, the screen holes will be quickly blocked, and the screening efficiency will drop sharply. This not only seriously restricts the processing capacity, but also forces the production process to be frequently interrupted for cleaning, which greatly disrupts the continuity and stability of production.

[0004] In summary, to improve screening efficiency and prevent screen clogging, it is necessary to address the problems of traditional plastic recycling screening devices having simple screen structures and lacking effective material guidance and distribution mechanisms, which disrupt the continuity and stability of production. The goal is to enable plastic recycling screening devices to perform multi-stage screening quickly and efficiently. Utility Model Content

[0005] The problem to be solved by the double-layer screening plastic recycling screening device provided by this utility model is that the traditional plastic recycling screening device has a simple screen structure and lacks an effective material guiding and distribution mechanism, which disrupts the continuity and stability of production.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a double-layer plastic recycling screening device, comprising a screening shell, a feeding hopper, several side discharge ports and a bottom discharge port on the screening shell, a double-layer conical screen slidably connected inside the screening shell, several connecting components installed between the double-layer conical screen and the screening shell, a limiting cylinder fixedly connected to the bottom of the screening shell, a vibration component installed on the screening shell, a sliding column connected to the output end of the vibration component, the sliding column slidably connected inside the limiting cylinder, the vibration component driving the sliding column to move along the limiting cylinder, a conical head fixedly connected to the top of the sliding column, an annular partition plate provided on the sliding column, and second compression springs fixedly connected between both sides of the annular partition plate and the limiting cylinder.

[0007] In a preferred embodiment, the connecting assembly includes a sliding cylinder fixedly connected to the double-layer conical screen, a fixed cylinder fixedly connected to the screening housing, and a first compression spring fixedly connected between the sliding cylinder and the fixed cylinder, wherein the sliding cylinder and the fixed cylinder are slidably connected.

[0008] In a preferred embodiment, the vibration assembly includes a first motor fixedly connected to the screening housing, a swing arm with one end fixedly connected to the first motor via a shaft, and a first connecting rod with one end rotatably connected to the other end of the swing arm. The other end of the first connecting rod is rotatably connected to a sliding column, and the first motor is used to drive the swing arm to rotate.

[0009] In a preferred embodiment, a rotating assembly is installed on the screening shell, and the output end of the rotating assembly is connected to a central stirring rod. The central stirring rod is rotatably connected to the screening shell and the double-layer conical screen, and the rotating assembly is used to drive the central stirring rod to rotate.

[0010] In a preferred embodiment, the rotating assembly includes a second motor fixedly connected to the screening housing, a first gear fixedly connected to the output end of the second motor via a shaft, and a second gear meshing with one side of the first gear. The second gear is fixedly connected to the central stirring rod, and the second motor is used to drive the first gear to rotate.

[0011] In a preferred embodiment, two grooves are provided on the central stirring rod, and a movable rod is slidably connected in the grooves. Two symmetrical cleaning brushes are fixedly connected to both ends of the movable rod.

[0012] In a preferred embodiment, a feeding assembly is installed on the screening shell, and a plurality of baffles are connected to the output end of the feeding assembly. The baffles are slidably connected in the side discharge port, and the feeding assembly is used to drive the baffles to move in a preset direction.

[0013] In a preferred embodiment, the feeding assembly includes an electric push rod fixedly connected to the screening housing and a second connecting rod fixedly connected to the output end of the electric push rod. Several baffles are fixedly connected to the second connecting rod, and the electric push rod is used to drive the second connecting rod to move along a preset direction.

[0014] The beneficial effects of this utility model are as follows: 1. This utility model uses a double-layered conical screen arranged coaxially with a larger aperture at the top and a smaller aperture at the bottom, and a conical head matching its taper, to perform precise and vertical directional striking under the drive of a vibration component. This concentrates the vibration energy onto the center of the screen and evenly transmits it to the entire conical surface, allowing the material to be automatically dispersed by gravity on the conical screen surface, ensuring smooth flow. Combined with directional vibration, it achieves efficient three-stage screening of "coarse-medium-fine", significantly improving screening efficiency and accuracy, and effectively avoiding material accumulation and screen hole blockage.

[0015] 2. This utility model uses a central stirring rod driven by a rotating component, a floating movable rod, and a cleaning brush. As the cleaning brush rotates with the rod, it can adapt to the vibration of the screen and always stick to the surface of the screen under the action of gravity. It can scrape away blockages in real time, solve the problem of screen hole blockage, and ensure that the equipment can operate continuously and stably for a long time without stopping. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0017] Figure 2 This is a schematic cross-sectional view of the overall structure of this utility model.

[0018] Figure 3 This is a schematic diagram of the vibration component structure of this utility model.

[0019] Figure 4 This is a schematic diagram of the double-layer conical screen structure of this utility model.

[0020] Figure 5 This is a schematic diagram of the central stirring rod structure of this utility model.

[0021] Figure 6 This is a schematic diagram of the baffle structure of this utility model.

[0022] The attached figures are labeled as follows: 1. Screening shell; 101. Feed hopper; 102. Side discharge port; 103. Bottom discharge port; 2. Double-layer conical screen; 301. Sliding cylinder; 302. First compression spring; 303. Fixed cylinder; 401. First motor; 402. Swing arm; 403. First connecting rod; 5. Sliding column; 501. Annular partition; 6. Conical head; 7. Limiting cylinder; 8. Second compression spring; 901. Second motor; 902. First gear; 903. Second gear; 10. Central stirring rod; 1001. Slide groove; 11. Movable rod; 12. Cleaning brush; 1301. Electric push rod; 1302. Second connecting rod; 14. Baffle. Detailed Implementation

[0023] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0024] Refer to the instruction manual appendix Figures 1 to 6A double-layer plastic recycling screening device includes a screening shell 1, which has a feed hopper 101, several side discharge ports 102 and a bottom discharge port 103. A double-layer conical screen 2 is slidably connected inside the screening shell 1. Several connecting components are installed between the double-layer conical screen 2 and the screening shell 1. A limiting cylinder 7 is fixedly connected to the bottom of the screening shell 1. A vibration component is installed on the screening shell 1. A sliding column 5 is connected to the output end of the vibration component. The sliding column 5 is slidably connected inside the limiting cylinder 7. The vibration component is used to drive the sliding column 5 to move along the limiting cylinder 7. A conical head 6 is fixedly connected to the top of the sliding column 5. An annular partition 501 is provided on the sliding column 5. Second compression springs 8 are fixedly connected between the two sides of the annular partition 501 and the limiting cylinder 7.

[0025] It should be noted that the feed hopper 101 is located at the top of the screening shell 1, and there are two side discharge ports 102, corresponding to the two discharge holes of the double-layer conical screen 2. The bottom discharge port 103 is located at the bottom of the screening shell 1 and is used to collect the finest plastic particles or powders that pass through the two screens. The double-layer conical screen 2 is composed of two coaxially arranged conical screens, and the aperture of the upper screen is larger than that of the lower screen. Through the connecting component, the double-layer conical screen 2 is allowed to vibrate freely within a certain range, and the taper of the conical head 6 is consistent with the taper of the screen of the double-layer conical screen 2, so that the conical head 6 can better strike the double-layer conical screen 2 and make the double-layer conical screen 2 vibrate.

[0026] Refer to the instruction manual appendix Figure 4 The connecting assembly includes a sliding cylinder 301 fixedly connected to the double-layer conical screen 2, a fixed cylinder 303 fixedly connected to the screening housing 1, and a first compression spring 302 fixedly connected between the sliding cylinder 301 and the fixed cylinder 303. The sliding cylinder 301 and the fixed cylinder 303 are slidably connected.

[0027] It should be noted that both the sliding cylinder 301 and the fixed cylinder 303 are hollow cylinders, arranged in a circular pattern between the screening shell 1 and the double-layer conical screen 2, and the first compression spring 302 is pre-compressed between the sliding cylinder 301 and the fixed cylinder 303 to achieve elastic support and vibration isolation functions.

[0028] Another embodiment based on the double-layer conical screen 2: the method of fixing the double-layer conical screen 2 on the sliding cylinder 301 can be improved to a detachable installation structure. Specifically, the double-layer conical screen 2 can be installed on the sliding cylinder 301 by bolts, which facilitates the overall replacement of the double-layer conical screen 2 in the future and improves the efficiency of subsequent maintenance.

[0029] Refer to the instruction manual appendix Figure 3The vibration assembly includes a first motor 401 fixedly connected to the screening housing 1, a swing arm 402 fixedly connected to the first motor 401 at one end via a shaft, and a first connecting rod 403 rotatably connected to the other end of the swing arm 402 at one end. The other end of the first connecting rod 403 is rotatably connected to the sliding column 5. The first motor 401 is used to drive the swing arm 402 to rotate.

[0030] It should be noted that the first motor 401 is installed at the bottom of the screening housing 1. The rotational motion of the first motor 401 is converted into circular motion through the swing arm 402, and then the circular motion of the swing arm 402 is converted into the linear reciprocating motion of the slide column 5 through the first connecting rod 403. The length of the swing arm 402 determines the stroke of the slide column 5.

[0031] Refer to the instruction manual appendix Figure 5 A rotating assembly is installed on the screening housing 1. The output end of the rotating assembly is connected to a central stirring rod 10. The central stirring rod 10 is rotatably connected to the screening housing 1 and the double-layer conical screen 2. The rotating assembly is used to drive the central stirring rod 10 to rotate.

[0032] It should be noted that the upper end of the central stirring rod 10 is connected and sealed to the top cover of the screening housing 1 through a sealed bearing seat to prevent material overflow. The lower end of the central stirring rod 10 passes through the central area of ​​the double-layer conical screen 2 and is rotatably connected through a rolling bearing to ensure that it can rotate freely without interfering with the vibration of the screen.

[0033] Refer to the instruction manual appendix Figure 5 The rotating assembly includes a second motor 901 fixedly connected to the screening housing 1, a first gear 902 fixedly connected to the output end of the second motor 901 via a shaft, and a second gear 903 meshing with one side of the first gear 902. The second gear 903 is fixedly connected to the central stirring rod 10. The second motor 901 is used to drive the first gear 902 to rotate.

[0034] It should be noted that the second motor 901 is installed on the top of the screening housing 1, and drives the central stirring rod 10 to rotate through the first gear 902 and the second gear 903. The first gear 902 and the second gear 903 are matched in size to achieve stable power transmission.

[0035] Refer to the instruction manual appendix Figure 5 Two grooves 1001 are provided on the central stirring rod 10. A movable rod 11 is slidably connected in the groove 1001. Two symmetrical cleaning brushes 12 are fixedly connected to both ends of the movable rod 11.

[0036] It should be noted that the two chutes 1001 are located at the connection between the central stirring rod 10 and the two layers of the double-layer conical screen 2, and the size of the chutes 1001 is the same as that of the movable rod 11. The movable rod 11 is located above the screen and is always close to the screen under the action of gravity, so that the cleaning brush 12 is in contact with the screen. At the same time, the chutes 1001 only allow the movable rod 11 to move vertically in coordination with the vibration of the double-layer conical screen 2. When the central stirring rod 10 rotates, it drives the movable rod 11 and the cleaning brush 12 to rotate synchronously.

[0037] Another embodiment based on the central stirring rod 10: an axial guide rod is added to the center of the chute 1001, and the diameter of this guide rod is smaller than the diameter of the central stirring rod 10 and the diameter of the movable rod 11. At the same time, a through hole consistent with the guide rod is opened in the center of the movable rod 11, so that the movable rod 11 slides on the guide rod, and the horizontal movement of the movable rod 11 is completely limited, so that the movable rod 11 can only move in the vertical direction, avoiding the possibility of the movable rod 11 deviating or even falling off.

[0038] Refer to the instruction manual appendix Figure 6 A feeding assembly is installed on the screening housing 1. Several baffles 14 are connected to the output end of the feeding assembly. The baffles 14 are slidably connected in the side discharge port 102. The feeding assembly is used to drive the baffles 14 to move in a preset direction.

[0039] It should be noted that a slot is provided on the side discharge port 102, the size of which is the same as that of the baffle 14. The baffle 14 can completely close the side discharge port 102. When the device is working, the baffle 14 closes the side discharge port 102 to prevent the discharge of incompletely screened plastic. After screening is completed, the baffle 14 opens the side discharge port 102 to discharge the plastic.

[0040] Refer to the instruction manual appendix Figure 6 The feeding assembly includes an electric push rod 1301 fixedly connected to the screening housing 1 and a second connecting rod 1302 fixedly connected to the output end of the electric push rod 1301. Several baffles 14 are fixedly connected to the second connecting rod 1302. The electric push rod 1301 is used to drive the second connecting rod 1302 to move along a preset direction.

[0041] It should be noted that the electric push rod 1301 is installed on the outside of the screening housing 1. It drives multiple baffles 14 to move synchronously through the second connecting rod 1302. The position of each baffle 14 is precisely aligned with a side discharge port 102, so as to realize the synchronous opening and closing of the side discharge port 102.

[0042] Working principle: After the plastic material to be screened is fed into the feed hopper 101, the first motor 401 is started to drive the swing arm 402 to rotate. Through the first connecting rod 403, the sliding column 5 moves linearly back and forth in the limiting cylinder 7. The conical head 6 at the top of the sliding column 5 periodically strikes the double-layer conical screen 2, causing it to vibrate. The second compression springs 8 on both sides of the annular partition 501 assist this movement and play a buffering role. At the same time, the sliding cylinder 301 and the fixed cylinder 303 are elastically deformed by the first compression spring 302, allowing the double-layer conical screen 2 to achieve elastic vibration in the screening shell 1. Under the action of vibration, the material is separated according to particle size. Meanwhile, the second motor 901 drives the central stirring rod 10 to rotate via the first gear 902 and the second gear 903, which in turn drives the movable rod 11 and the cleaning brush 12 to rotate. The cleaning brush 12 floats vertically under the restriction of the slide 1001 and continuously cleans the screen surface to prevent clogging. After screening, the electric push rod 1301 drives multiple baffles 14 to open the side discharge port 102 simultaneously via the second connecting rod 1302, so that larger particles are discharged from the upper side discharge port 102, medium particles are discharged from the lower side discharge port 102, and the finest particles are discharged from the bottom discharge port 103, thus achieving orderly discharge of materials.

[0043] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A double-layer screening device for plastic recycling, characterized in that: The screen includes a screening shell (1), which has a feed hopper (101), several side discharge ports (102) and a bottom discharge port (103). A double-layer conical screen (2) is slidably connected inside the screening shell (1). Several connecting components are installed between the double-layer conical screen (2) and the screening shell (1). A limiting cylinder (7) is fixedly connected to the bottom of the screening shell (1). A vibration component is installed on the screening shell (1). A sliding column (5) is connected to the output end of the vibration component. The sliding column (5) is slidably connected inside the limiting cylinder (7). The vibration component is used to drive the sliding column (5) to move along the limiting cylinder (7). A conical head (6) is fixedly connected to the top of the sliding column (5). An annular partition (501) is provided on the sliding column (5). A second compression spring (8) is fixedly connected between the two sides of the annular partition (501) and the limiting cylinder (7).

2. The plastic recycling screening device with double-layer screening according to claim 1, characterized in that: The connecting assembly includes a sliding cylinder (301) fixedly connected to the double-layer conical screen (2), a fixed cylinder (303) fixedly connected to the screening housing (1), and a first compression spring (302) fixedly connected between the sliding cylinder (301) and the fixed cylinder (303). The sliding cylinder (301) and the fixed cylinder (303) are slidably connected.

3. The plastic recycling screening device with double-layer screening according to claim 1, characterized in that: The vibration assembly includes a first motor (401) fixedly connected to the screening housing (1), a swing arm (402) fixedly connected to the first motor (401) at one end by a shaft, and a first connecting rod (403) rotatably connected to the other end of the swing arm (402). The other end of the first connecting rod (403) is rotatably connected to the slide column (5). The first motor (401) is used to drive the swing arm (402) to rotate.

4. The plastic recycling screening device with double-layer screening according to claim 1, characterized in that: A rotating assembly is installed on the screening shell (1). The output end of the rotating assembly is connected to a central stirring rod (10). The central stirring rod (10) is rotatably connected to the screening shell (1) and the double-layer conical screen (2). The rotating assembly is used to drive the central stirring rod (10) to rotate.

5. The plastic recycling screening device with double-layer screening according to claim 4, characterized in that: The rotating assembly includes a second motor (901) fixedly connected to the screening housing (1), a first gear (902) fixedly connected to the output end of the second motor (901) via a shaft, and a second gear (903) meshing with one side of the first gear (902). The second gear (903) is fixedly connected to the central stirring rod (10), and the second motor (901) is used to drive the first gear (902) to rotate.

6. The plastic recycling screening device with double-layer screening according to claim 5, characterized in that: Two grooves (1001) are provided on the central stirring rod (10). A movable rod (11) is slidably connected in the groove (1001). Two symmetrical cleaning brushes (12) are fixedly connected at both ends of the movable rod (11).

7. The plastic recycling screening device with double-layer screening according to claim 1, characterized in that: A feeding assembly is installed on the screening shell (1). Several baffles (14) are connected to the output end of the feeding assembly. The baffles (14) are slidably connected in the side discharge port (102). The feeding assembly is used to drive the baffles (14) to move in a preset direction.

8. The plastic recycling screening device with double-layer screening according to claim 7, characterized in that: The feeding assembly includes an electric push rod (1301) fixedly connected to the screening housing (1) and a second connecting rod (1302) fixedly connected to the output end of the electric push rod (1301). Several baffles (14) are fixedly connected to the second connecting rod (1302). The electric push rod (1301) is used to drive the second connecting rod (1302) to move in a preset direction.

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