Polypropylene granule screening device

Abstract

The utility model provides a polypropylene granule screening device, and belongs to the technical field of screening devices. Comprising an outer tank, an inner screening cylinder is arranged in the outer tank, a stirring anti-blocking assembly is arranged in the inner screening cylinder, a discharging port is formed in the bottom of the outer tank, and a vertical inclined discharging pipe penetrating through the side wall of the discharging port is arranged at the bottom of the inner screening cylinder; the stirring anti-blocking assembly comprises a stirring rod, and C-shaped plates are symmetrically arranged on the two sides of a rod body of the stirring rod. During screening, through the stirring anti-blocking assembly, the stirring vertical blade rotates to enable polypropylene granules to be screened at all positions of the inner screening barrel to flow to the periphery of the screening holes to be screened, the scraper rotates to scrape off the large-particle polypropylene granules blocked on the screening holes, and then the normal screening effect is effectively prevented from being affected; and after screening is completed, a control valve is opened, a small part of large-particle-size polypropylene granules retained in the inner screening barrel are discharged through a vertical inclined discharging pipe, the large-particle-size polypropylene granules accumulated in the inner screening barrel do not need to be manually cleaned subsequently, and more trouble is saved.

Description

Technical Field

[0001] This utility model provides a polypropylene granule screening device, belonging to the technical field of screening devices. Background Technology

[0002] Polypropylene granules are a thermoplastic synthetic resin with several excellent basic properties. Firstly, they have a low density, typically between 0.89 and 0.91 g / cm³. 3 Among general-purpose plastics, polypropylene (PP) is the lightest. Secondly, PP granules possess excellent mechanical properties, including high tensile strength, flexural strength, and modulus, as well as excellent chemical and heat resistance, maintaining structural integrity at high temperatures. Furthermore, PP granules absorb almost no water and have good electrical insulation properties, making them suitable for the electronics and electrical industries. Simultaneously, PP granules exhibit good processability, easily forming through processes such as injection molding, extrusion, and blow molding. During processing, PP granules typically require screening equipment for granule selection.

[0003] Existing screening devices can basically meet the normal screening needs of polypropylene granules, but they still have certain drawbacks: after most of the small-diameter polypropylene granules pass through the sieve holes, a small portion of the large-diameter polypropylene granules inevitably remain on top of the sieve plate. After screening for a period of time, the sieve holes are often covered by the accumulated large-diameter polypropylene granules, which can easily affect the normal screening effect and requires manual cleaning, which is relatively time-consuming. Based on this, this utility model provides a polypropylene granule screening device. Utility Model Content

[0004] The technical problem solved by this utility model is that the sieve holes of the sieve plate are often covered by large-diameter polypropylene granules accumulated on them, which can easily affect the normal screening effect and requires manual cleaning later, which is relatively troublesome.

[0005] To solve the technical problem, the technical solution provided by this utility model is as follows: a polypropylene granule screening device, including an outer tank, an inner screening cylinder inside the outer tank, a stirring and anti-clogging component inside the inner screening cylinder, a discharge port at the bottom of the outer tank, and a vertical inclined discharge pipe passing through the side wall of the discharge port at the bottom of the inner screening cylinder; the stirring and anti-clogging component includes a stirring rod, C-shaped plates symmetrically arranged on both sides of the stirring rod, and several scrapers in contact with the inner side wall and inner bottom wall of the inner screening cylinder on the outer and bottom walls of the C-shaped plates, and the lower end of the stirring rod is inserted into the vertical inclined discharge pipe and is provided with spiral stirring blades.

[0006] Furthermore, the top of the inner screening cylinder is fixedly connected to the inner top wall of the outer tank, the top of the outer tank is provided with a feed inlet located inside the inner screening cylinder, and the side walls and bottom walls of the inner screening cylinder are provided with a number of sieve holes.

[0007] Furthermore, the stirring and anti-clogging component also includes a motor fixedly installed at the center of the top of the outer tank, with the output end of the motor inserted into the inner screening cylinder and fixedly connected to the top of the stirring rod.

[0008] Furthermore, the vertical inclined discharge pipe is equipped with a control valve located below the spiral stirring blade.

[0009] Furthermore, an electric fan is provided at the top of the outer tank, positioned on both sides of the stirring rod.

[0010] Furthermore, the inner bottom wall of the C-shaped plate is provided with several stirring blades at equal intervals.

[0011] The beneficial effects of this utility model are:

[0012] During screening, the stirring and anti-clogging component, with its rotating vertical blades, agitates the polypropylene granules inside the inner screening cylinder. This allows the polypropylene granules to flow to the periphery of the screen holes for screening. The rotating scraper removes large polypropylene granules that are blocking the screen holes, effectively preventing them from affecting the normal screening effect. After screening, the control valve is opened, and a small portion of the large-diameter polypropylene granules remaining in the inner screening cylinder are discharged through the vertical inclined discharge pipe. This eliminates the need for manual cleaning of the large-diameter polypropylene granules accumulated inside the inner screening cylinder, making the process more convenient. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a polypropylene granule screening device according to the present invention. Figure 1 .

[0014] Figure 2 This is a schematic diagram of the structure of a polypropylene granule screening device according to the present invention. Figure 2 .

[0015] Figure 3 This is a schematic diagram of the structure of a polypropylene granule screening device according to the present invention. Figure 3 .

[0016] Figure 4 This is a plan view of a polypropylene granule screening device according to the present invention.

[0017] 1. Outer tank; 2. Inner screening cylinder; 3. Agitator anti-clogging component; 4. Discharge port; 5. Vertical and inclined discharge pipe; 6. Agitator rod; 7. C-shaped plate; 8. Scraper; 9. Spiral agitator blade; 10. Feed inlet; 11. Screen hole; 12. Motor; 13. Control valve; 14. Electric fan; 15. Agitator blade. Detailed Implementation

[0018] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly mentioned in this specification are defined relative to their structure and are relative concepts. Therefore, they may vary depending on their location and usage; thus, these or other directional terms should not be interpreted as restrictive terms.

[0019] The singular forms “a,” “the,” and “the” used in this specification are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes one or more of the associated listed items, any or all possible combinations thereof.

[0020] To make the technical problems to be solved, the technical solutions, and the beneficial effects of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0021] According to the appendix Figure 1 , 4 As shown: This utility model provides a polypropylene granule screening device, including an outer tank 1, an inner screening cylinder 2 inside the outer tank 1, a plurality of sieve holes 11 on the side wall and bottom wall of the inner screening cylinder 2, a stirring anti-blocking component 3 inside the inner screening cylinder 2, the stirring anti-blocking component 3 including a stirring rod 6, C-shaped plates 7 symmetrically arranged on both sides of the stirring rod 6, a plurality of scrapers 8 on the outer side wall and bottom wall of the C-shaped plates 7 that contact the inner side wall and bottom wall of the inner screening cylinder 2, a plurality of stirring blades 15 equidistantly arranged on the inner bottom wall of the C-shaped plates 7, the stirring anti-blocking component 3 also includes a motor 12 fixedly installed at the top center of the outer tank 1, the output end of the motor 12 is inserted into the inner screening cylinder 2 and fixedly connected to the top of the stirring rod 6. Specifically, starting the motor 12 drives the stirring rod 6 to rotate, thereby driving the C-shaped plates 7 to rotate, thereby driving the scrapers 8 and stirring blades 15 to rotate around the stirring rod 6. The rotation of the stirring blades 15 can stir the polypropylene granules in the inner screening cylinder 2, so that the polypropylene granules in the inner screening cylinder 2 are in a flowing state.

[0022] As per the instruction manual Figure 2 , 3As shown in Figure 4: The bottom of the outer tank 1 is provided with a discharge port 4, and the bottom of the inner screening cylinder 2 is provided with a vertical inclined discharge pipe 5 that passes through the side wall of the discharge port 4. The lower end of the stirring rod 6 is inserted into the vertical inclined discharge pipe 5 and is provided with a spiral stirring blade 9. The top of the inner screening cylinder 2 is fixedly connected to the inner top wall of the outer tank 1. The top of the outer tank 1 is provided with a feed port 10 located inside the inner screening cylinder 2. The vertical inclined discharge pipe 5 is provided with a control valve 13 located below the spiral stirring blade 9. Specifically, most of the small-diameter polypropylene granules are screened through the sieve holes 11 of the inner screening cylinder 2 and fall into the outer tank 1, and are finally discharged through the discharge port 4. When the control valve 13 is opened, a small portion of the large-diameter polypropylene granules that remain in the inner screening cylinder 2 are discharged through the vertical inclined discharge pipe 5.

[0023] As per the instruction manual Figure 4 As shown: The top of the outer tank 1 is equipped with electric fans 14 placed on both sides of the stirring rod 6. When the electric fans 14 are turned on, they can blow air onto the polypropylene granules added into the inner screening cylinder 2. Combined with the stirring blades 15, the polypropylene granules are stirred, which effectively prevents some of the polypropylene granules in the inner screening cylinder 2 from sticking together.

[0024] The principle of this utility model

[0025] In use, the polypropylene granules to be screened are added into the inner screening cylinder 2 through the feed inlet 10. Most of the small-diameter polypropylene granules are screened through the screen holes 11 of the inner screening cylinder 2 and fall into the outer tank 1, and are finally discharged through the discharge outlet 4. The control valve 13 is opened, and a small portion of the large-diameter polypropylene granules that remain in the inner screening cylinder 2 are discharged through the vertical inclined discharge pipe 5. Through the stirring and anti-blocking component 3, the motor 12 is started to drive the stirring rod 6 to rotate, which in turn drives the spiral stirring blade 9 to rotate. This can effectively prevent the large-diameter polypropylene granules from blocking the vertical inclined discharge pipe 5 during discharge. There is no need to manually clean the large-diameter polypropylene granules accumulated inside the inner screening cylinder 2 afterward, which is more convenient.

[0026] During screening, a certain amount of polypropylene particles will accumulate inside the inner screening cylinder 2, covering the screen holes 11. Through the stirring and anti-clogging component 3, the motor 12 is started to drive the scraper 8 and the stirring blades 15 to rotate around the stirring rod 6. The rotation of the stirring blades 15 can stir the polypropylene particles in the inner screening cylinder 2, so that the polypropylene particles in the inner screening cylinder 2 are in a flowing state. This allows the polypropylene particles to be screened in various parts of the inner screening cylinder 2 to flow to the periphery of the screen holes 11 for screening. The rotation of the scraper 8 can scrape off the large polypropylene particles that are blocking the screen holes 11, thereby effectively avoiding affecting the normal screening effect.

[0027] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A polypropylene granule screening device, comprising an outer tank (1), characterized in that: The outer tank (1) is provided with an inner screening cylinder (2), and the inner screening cylinder (2) is provided with a stirring and anti-blocking component (3). The bottom of the outer tank (1) is provided with a discharge port (4), and the bottom of the inner screening cylinder (2) is provided with a vertical inclined discharge pipe (5) that passes through the side wall of the discharge port (4). The stirring and anti-blocking component (3) includes a stirring rod (6), and C-shaped plates (7) are symmetrically provided on both sides of the stirring rod (6). The outer side wall and the outer bottom wall of the C-shaped plate (7) are provided with several scrapers (8) that contact the inner side wall and the inner bottom wall of the inner screening cylinder (2). The lower end of the stirring rod (6) is inserted into the vertical inclined discharge pipe (5) and is provided with a spiral stirring blade (9).

2. A polypropylene pellet screening device as claimed in claim 1, wherein: The top of the inner screening cylinder (2) is fixedly connected to the inner top wall of the outer tank (1). The top of the outer tank (1) is provided with a feed inlet (10) located inside the inner screening cylinder (2). The side wall and bottom wall of the inner screening cylinder (2) are provided with a number of sieve holes (11).

3. A polypropylene pellet screening device as claimed in claim 1, wherein: The stirring anti-blocking component (3) also includes a motor (12) fixedly installed at the top center of the outer tank (1). The output end of the motor (12) is inserted into the inner screening cylinder (2) and fixedly connected to the top of the stirring rod (6).

4. A polypropylene pellet screening device as claimed in claim 1, wherein: The vertical inclined discharge pipe (5) is equipped with a control valve (13) located below the spiral stirring blade (9).

5. A polypropylene pellet screening device as claimed in claim 1, wherein: The outer tank (1) is equipped with electric fans (14) placed on both sides of the stirring rod (6) at the top.

6. A polypropylene pellet screening device as claimed in claim 1, wherein: The inner bottom wall of the C-shaped plate (7) is provided with several stirring blades (15) at equal intervals.

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