Plastic particle classifying and screening device

Abstract

The utility model relates to the field of plastic particle screening, and discloses a plastic particle grading screening device which comprises a screening frame, a motor is fixedly installed at the top end of the screening frame, and the output end of the motor rotationally penetrates through the center position of the top end of the screening frame and extends into the screening frame to be fixedly connected with the top end of a rotating shaft. A first annular filter screen, a second annular filter screen and a third annular filter screen are arranged in the screening frame in parallel in the vertical direction, a rotating shaft is fixedly connected with a plurality of middle cylinders in a sleeving mode in the vertical direction, and mounting ring blocks are arranged on the inner wall of the screening frame and located at the same horizontal height position of each middle cylinder. And the inner sides and the outer sides of the first annular filter screen, the second annular filter screen and the third annular filter screen are fixedly connected with one ends of the corresponding middle cylinders and the corresponding mounting ring blocks through a plurality of connecting assemblies respectively, the plastic particle screening device facilitates screening of plastic particles, and the situation that the screening process is affected due to mesh hole blockage is avoided.

Description

Technical Field

[0001] This utility model relates to the field of plastic particle screening, specifically a plastic particle grading and screening device. Background Technology

[0002] Plastics are polymeric compounds formed by polymerization of monomers through addition or condensation reactions. They possess moderate resistance to deformation, falling between fibers and rubber, and are composed of synthetic resins and additives such as fillers, plasticizers, stabilizers, lubricants, and colorants. The main component of plastics is resin. Resin refers to the polymeric compound before it is mixed with various additives. The term "resin" originally derived from lipids secreted by plants and animals, such as rosin and shellac. Resin accounts for approximately 40% to 100% of the total weight of plastics. The basic properties of plastics are primarily determined by the nature of the resin, but additives also play an important role. Some plastics are essentially composed of synthetic resins, containing little or no additives, such as plexiglass and polystyrene.

[0003] Plastic particles, also known as plastic granules, refer to granular plastics, generally classified into over 200 types, with further subdivisions reaching thousands. Common plastic particles include general-purpose plastics, engineering plastics, and specialty plastics. General-purpose plastics include: polypropylene, polyethylene, polyvinyl chloride, polystyrene, polyester, and polyurethane. Engineering plastics include: nylon, polytetrafluoroethylene, polyoxymethylene, and polycarbonate. Specialty plastics include: thermosetting plastics and functional polymer plastics, such as those used in artificial kidneys.

[0004] In the production of plastic particles, it is often necessary to screen the plastic particles according to their particle size. The existing screening methods are basically screens. However, during the screening process, the screen mesh may become clogged, which will affect the entire screening process. Utility Model Content

[0005] The purpose of this invention is to provide a plastic particle grading and screening device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a plastic particle grading and screening device, comprising a screening frame, a motor fixedly installed at the top of the screening frame, and the output end of the motor rotating through and extending into the center of the top of the screening frame and fixedly connected to the top of the rotating shaft, wherein a first annular filter, a second annular filter, and a third annular filter are arranged parallel to each other in the vertical direction inside the screening frame, and a plurality of intermediate cylinders are sleeved and fixedly mounted on the rotating shaft in the vertical direction, wherein mounting ring blocks are respectively arranged at the same horizontal height position on the inner wall of the screening frame and each intermediate cylinder, and the inner and outer sides of the first annular filter, the second annular filter, and the third annular filter are respectively fixedly connected to one end of the corresponding intermediate cylinder and the mounting ring block through a plurality of connecting components.

[0007] Preferably, the center of the intermediate cylinder is sleeved and fixed to the outside of the rotating shaft, and the bottom end of the intermediate cylinder is fixedly connected with an annular structure.

[0008] Preferably, the mounting ring block has an annular through groove at its center and an annular groove on the side of the mounting ring block closest to the annular through groove.

[0009] Preferably, the inner and outer sides of the first, second, and third annular filters are respectively fixedly connected with connecting rings, and each connecting component includes a slide rod that is slidably inserted into each connecting ring.

[0010] Preferably, the bottom end of each slide rod is fixedly connected to the top end of the annular structure of the intermediate cylinder and the bottom end of the inner wall of the annular groove of the mounting ring block, and the plurality of slide rods are distributed in a ring shape along the connecting ring.

[0011] Preferably, each of the slide rods is fitted with a spring on its outer side, and the top end of the spring is fixedly connected to the bottom end of each connecting ring. The bottom end of each spring is fixedly connected to the top end of the annular structure of the intermediate cylinder and the bottom end of the inner wall of the annular groove of the mounting ring block.

[0012] Preferably, the inner walls of the screening frames on one side of the first, second, and third annular filters are respectively provided with discharge troughs.

[0013] Compared with the prior art, the advantages of this utility model are as follows:

[0014] This invention involves feeding plastic particles into the screening frame through a feeding port at the top. A motor drives a rotating shaft, which in turn rotates each intermediate cylinder. This rotation, through multiple connecting components, drives the first, second, and third annular filters to rotate, thus screening the plastic particles falling onto their surfaces. The mesh size of the first, second, and third annular filters increases sequentially, allowing for graded screening of the plastic particles. The screened material exits from one side of each of the first, second, and third annular filters. The discharge troughs on the side walls of the screening frame are removed. To prevent plastic particles from accumulating on the surfaces of the first, second, and third annular filters and affecting the screening effect, connecting rings on both sides of the first, second, and third annular filters are respectively fitted onto the outer sides of the corresponding sliding rods. These rings are then elastically connected to the intermediate cylinder and one end of the mounting ring block via springs. As a result, the mechanical vibration generated during equipment operation, with the springs increasing the amplitude, promotes the shaking of the first, second, and third annular filters, thereby shaking the plastic particles on the surfaces of the first, second, and third annular filters and promoting the screening process. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is an enlarged schematic diagram of the structure at point A of this utility model.

[0017] In the diagram: 1. Screening frame; 2. Motor; 3. Rotating shaft; 4. Intermediate cylinder; 5. Mounting ring block; 6. First annular filter screen; 7. Second annular filter screen; 8. Third annular filter screen; 9. Connecting assembly; 10. Discharge chute; 91. Connecting ring; 92. Slide rod. 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 protection scope of the present utility model.

[0019] Example 1

[0020] Please see Figures 1-2 The illustrated plastic particle grading and screening device includes a screening frame 1. A motor 2 is fixedly installed at the top of the screening frame 1, and the output end of the motor 2 rotates through and extends into the center of the top of the screening frame 1, and is fixedly connected to the top of the rotating shaft 3. A first annular filter 6, a second annular filter 7, and a third annular filter 8 are arranged parallel to each other in the vertical direction inside the screening frame 1. Several intermediate cylinders 4 are sleeved and fixed in the vertical direction on the rotating shaft 3. Mounting ring blocks 5 are respectively arranged on the inner wall of the screening frame 1 and at the same horizontal height as each intermediate cylinder 4. The inner and outer sides of the first annular filter 6, the second annular filter 7, and the third annular filter 8 are respectively fixedly connected to one end of the corresponding intermediate cylinder 4 and mounting ring block 5 through several connecting components 9.

[0021] In this embodiment, the center of the intermediate cylinder 4 is sleeved and fixed to the outside of the rotating shaft 3, and an annular structure is fixedly connected to the bottom of the intermediate cylinder 4. An annular through groove is opened at the center of the mounting ring block 5, and an annular groove is opened on the side of the mounting ring block 5 near the annular through groove. Connecting rings 91 are fixedly connected to the inner and outer sides of the first annular filter screen 6, the second annular filter screen 7, and the third annular filter screen 8, respectively. Each connecting component 9 includes a slide rod 92 that is slidably inserted into each connecting ring 91. The bottom end of each slide rod 92 is fixedly connected to the top end of the annular structure of the intermediate cylinder 4 and the bottom end of the inner wall of the annular groove of the mounting ring block 5, and several slide rods 92 are distributed in a ring shape along the connecting ring 91. A spring is sleeved on the outside of each slide rod 92, and the top end of the spring is fixedly connected to the bottom end of each connecting ring 91. The bottom end of each spring is fixedly connected to the top end of the annular structure of the intermediate cylinder 4 and the bottom end of the inner wall of the annular groove of the mounting ring block 5, respectively. Discharge grooves 10 are opened on the inner wall of the screening frame 1 on one side of the first annular filter screen 6, the second annular filter screen 7, and the third annular filter screen 8, respectively.

[0022] Furthermore, plastic particles are fed into the screening frame 1 through the feeding port at the top of the screening frame 1. The motor 2 is controlled to drive the rotating shaft 3 to rotate, thereby driving each intermediate cylinder 4 to rotate. This, in turn, drives the first annular filter screen 6, the second annular filter screen 7, and the third annular filter screen 8 to rotate through the transmission of multiple connecting components 9. This screens the plastic particles falling on the surfaces of the first annular filter screen 6, the second annular filter screen 7, and the third annular filter screen 8. The mesh size of the first annular filter screen 6, the second annular filter screen 7, and the third annular filter screen 8 is set to increase sequentially, thereby classifying and screening the plastic particles. The screened material is screened through the sieves on one side of the first annular filter screen 6, the second annular filter screen 7, and the third annular filter screen 8. The discharge trough 10 opened on the side wall of the selection frame 1 is removed. In order to avoid the accumulation of plastic particles on the surface of the first annular filter screen 6, the second annular filter screen 7 and the third annular filter screen 8 and affect the screening effect, the connecting rings 91 set on both sides of the first annular filter screen 6, the second annular filter screen 7 and the third annular filter screen 8 are respectively sleeved on the outside of the corresponding slide rods 92, and elastically connected to the middle cylinder 4 and one end of the mounting ring block 5 by springs. Thus, the mechanical vibration generated during the operation of the equipment, with the spring increasing the amplitude, promotes the shaking of the first annular filter screen 6, the second annular filter screen 7 and the third annular filter screen 8, thereby shaking the plastic particles on the surface of the first annular filter screen 6, the second annular filter screen 7 and the third annular filter screen 8 to promote the screening process.

[0023] The working principle of this utility model is as follows: Plastic particles are fed into the screening frame 1 through the feeding port at the top of the screening frame 1. The motor 2 is controlled to drive the rotating shaft 3 to rotate, thereby driving each intermediate cylinder 4 to rotate. This, in turn, drives the first annular filter screen 6, the second annular filter screen 7, and the third annular filter screen 8 to rotate through the transmission of multiple connecting components 9. This screens the plastic particles falling on the surfaces of the first annular filter screen 6, the second annular filter screen 7, and the third annular filter screen 8. The mesh size of the first annular filter screen 6, the second annular filter screen 7, and the third annular filter screen 8 is set to increase sequentially, thereby classifying and screening the plastic particles. The screened material passes through the first annular filter screen 6, the second annular filter screen 7, and the third annular filter screen 8 respectively. The discharge trough 10 opened on the side wall of the screening frame 1 is removed. In order to avoid the accumulation of plastic particles on the surface of the first annular filter screen 6, the second annular filter screen 7 and the third annular filter screen 8 and affect the screening effect, the connecting rings 91 set on both sides of the first annular filter screen 6, the second annular filter screen 7 and the third annular filter screen 8 are respectively sleeved on the outside of the corresponding slide rods 92, and elastically connected to the middle cylinder 4 and one end of the mounting ring block 5 by springs. Thus, the mechanical vibration generated during the operation of the equipment, with the spring increasing the amplitude, promotes the shaking of the first annular filter screen 6, the second annular filter screen 7 and the third annular filter screen 8, thereby shaking the plastic particles on the surface of the first annular filter screen 6, the second annular filter screen 7 and the third annular filter screen 8 to promote the screening process.

[0024] 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 process, method, article, or apparatus.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A plastic particle grading screening device, comprising a screening frame (1), characterized in that: the top end of the screening frame (1) is fixedly provided with a motor (2), and the output end of the motor (2) is rotatably penetrated through the center of the top end of the screening frame (1) and extends into the interior of the screening frame (1) and is fixedly connected with the top end of a rotating shaft (3); the interior of the screening frame (1) is provided in parallel along the vertical direction with a first annular filter screen (6), a second annular filter screen (7) and a third annular filter screen (8); the rotating shaft (3) is fixedly sleeved with a plurality of intermediate cylinders (4) along the vertical direction; the inner wall of the screening frame (1) and each intermediate cylinder (4) are provided with a mounting ring block (5) at the same horizontal height; and the inner and outer sides of the first annular filter screen (6), the second annular filter screen (7) and the third annular filter screen (8) are fixedly connected with the corresponding intermediate cylinders (4) and one end of the mounting ring block (5) through a plurality of connecting assemblies (9). The intermediate cylinder (4) is fixedly sleeved at the center of the outer side of the rotating shaft (3), and the bottom end of the intermediate cylinder (4) is fixedly connected with an annular structure.

2. A device for classifying plastic particles according to claim 1, wherein: The center of the mounting ring block (5) is provided with an annular through groove, and the side close to the annular through groove of the mounting ring block (5) is provided with an annular groove.

3. A device for classifying plastic particles according to claim 2, wherein: The inner and outer sides of the first annular filter screen (6), the second annular filter screen (7) and the third annular filter screen (8) are fixedly connected with a connecting ring (91), and each connecting assembly (9) comprises a sliding rod (92) slidably inserted into each connecting ring (91).

4. A device for classifying plastic particles according to claim 3, wherein: The bottom end of each sliding rod (92) is fixedly connected with the top end of the annular structure of the intermediate cylinder (4) and the inner wall bottom end of the annular groove of the mounting ring block (5), and a plurality of sliding rods (92) are annularly distributed along the connecting ring (91).

5. A device for classifying plastic particles according to claim 4, wherein: The outer side of each sliding rod (92) is sleeved with a spring, and the top end of the spring is fixedly connected with the bottom end of each connecting ring (91), and the bottom end of each spring is fixedly connected with the top end of the annular structure of the intermediate cylinder (4) and the inner wall bottom end of the annular groove of the mounting ring block (5).

6. A device for classifying plastic particles according to claim 5, wherein: The inner wall of the screening frame (1) on one side of the first annular filter screen (6), the second annular filter screen (7) and the third annular filter screen (8) is provided with a discharge chute (10).

7. A device for classifying plastic particles according to claim 5, wherein: ​

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