Multi-stage screening device for plastic particles

Abstract

The utility model discloses a multi-stage plastic particle screening device, which relates to the technical field of plastic particle production equipment and comprises a box body, a handrail arranged in the middle of one end of the box body, a third discharge chute arranged at the bottom of one end of the box body in a penetrating manner, and a first screening component arranged in the middle of the other end of the box body in a penetrating manner. A second screening assembly penetrates through the bottom of the other end of the box body, mounting plates are arranged on the two sides of the box body, a moving assembly is arranged at the bottom end of the box body, and a feeding hopper penetrates through one side of the top of the box body. The plastic particle screening device is scientific and novel in structure, multi-stage screening can be carried out by arranging the first screening assembly and the second screening assembly, the screening precision and efficiency are effectively improved, and it is guaranteed that plastic particles with different particle sizes are accurately classified; and by means of the moving assembly, the whole screening device has good mobility and stability, the application range of the device is widened, and use convenience of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic particle processing equipment, in particular to a multi-stage screening device for plastic particles. Background Art

[0002] With the widespread application of plastic products in various industries, the recycling and reuse of plastic particles has become an important part of environmental protection and resource conservation. The quality of plastic particles directly affects the performance and application range of recycled plastic products. Therefore, efficient and accurate screening of plastic particles is particularly critical. Traditional plastic particle screening equipment mainly relies on a single-stage screening structure, which is difficult to meet the needs of fine classification of plastic particles of different particle sizes. In addition, with the increase in the amount of plastic recycled, higher requirements are placed on the processing capacity and screening efficiency of screening equipment. There is an urgent need to develop a multi-stage screening device with a scientific structure and complete functions to improve screening accuracy and production efficiency to meet the needs of industrial large-scale production.

[0003] For example, Chinese patent CN218083649U discloses a plastic particle size screening device with a vibration mechanism, including a base, a screening box, a screening component, a vibration motor, a first slide rail, a first protective plate and a handle. The screening box is connected to the left side of the top of the base, and a screening component is installed inside the screening box, which can automatically unload plastic particles and quickly screen plastic particles. However, the above-mentioned plastic particle size screening device has the following shortcomings in the process of specific application: First, the device is only equipped with a single screening component, resulting in a lack of refined control of multi-stage screening during the screening process. This design limits the screening accuracy and cannot effectively distinguish plastic particles of different particle sizes, thereby affecting the quality and uniformity of the final product; in addition, single-stage screening easily leads to an increased risk of screen hole clogging, reducing the screening efficiency and the continuous operation capability of the equipment, and is not practical.

[0004] Currently, no effective solutions have been proposed for the problems in related technologies. Utility Model Content

[0005] In response to the problems in the related art, the present invention proposes a multi-stage screening device for plastic particles to overcome the above-mentioned technical problems existing in the existing related art.

[0006] To this end, the specific technical solutions adopted in this utility model are as follows:

[0007] A multi-stage screening device for plastic particles comprises a box body, a handrail is provided in the middle of one end of the box body, a third discharge chute is provided through the bottom of one end of the box body, a first screening component is provided through the middle of the other end of the box body, a second screening component is provided through the bottom of the other end of the box body, mounting plates are provided on both sides of the box body, a movable component is provided at the bottom of the box body, and a feed hopper is provided through one side of the top of the box body.

[0008] Furthermore, in order to transmit the vibration force generated by the vibration motor to the box body, so that the entire device produces regular vibration movement, and promotes the movement and separation of plastic particles in the screening component, a feed hole that cooperates with the feed hopper is opened on one side of the top of the box body, a first discharge port that cooperates with the first screening component is opened in the middle of one end of the box body, and a second discharge port that cooperates with the second screening component is opened at the bottom of one end of the box body; a third discharge port that cooperates with the third discharge trough is opened at the bottom of the other end of the box body, and a support plate is provided at one end of the inner side of the box body, and a vibration motor is provided at the top of the support plate.

[0009] Furthermore, in order to achieve stable transmission of the vibration force generated by the vibration motor through the first elastic connecting member, realize primary screening, and efficiently separate larger plastic particles from medium plastic particles, the first screening component includes a first discharge trough running through the middle of one end of the box body, and first elastic connecting members are symmetrically arranged on both sides of the top inner side of the box body, a first screening box is arranged between the two groups of first elastic connecting members, a plurality of first screening holes are opened at the bottom end of the first screening box, and a first positioning shaft is arranged through the mounting plate at the bottom of both sides of the first screening box; the first elastic connecting member includes a fixed plate arranged on one side of the top inner side of the box body, an L-shaped connecting shaft is arranged at the bottom end of the fixed plate, one end of the L-shaped connecting shaft is sleeved with a first fixing ring, a spring is arranged at the bottom end of the first fixing ring, a second fixing ring is arranged at the bottom end of the spring, and a support shaft fixedly connected to the first screening box is arranged through the inner side of the second fixing ring.

[0010] Furthermore, in order to achieve the stable transmission of the vibration force generated by the vibration motor to the second screening box through the connecting shaft and the second elastic connecting member, so that it produces regular vibration, promotes the uniform distribution of plastic particles and secondary screening, the second screening assembly includes a second discharge trough running through the bottom of one end of the box body, and second elastic connecting members are symmetrically arranged on both sides of the bottom end of the inner side of the box body, and the second elastic connecting member has the same structure as the first elastic connecting member, and the bottom end of the first elastic connecting member is provided with a connecting shaft fixedly connected to the second elastic connecting member, and a second screening box is arranged between the two groups of second elastic connecting members, and a plurality of second screening holes are opened at the bottom end of the second screening box, and second positioning shafts are provided at the bottom of both sides of the second screening box through the mounting plate.

[0011] Furthermore, in order to enable the screening device to move freely between different working environments and production lines and adapt to changing production needs and spatial layouts, the moving component includes a frame arranged at the bottom end of the box, a front axle is arranged on one side of the bottom end of the frame, and a rear axle is arranged on the other side of the bottom end of the frame, and buffer components connected to the frame are symmetrically arranged on both sides of the top end of the front axle and the rear axle; the buffer component includes a first U-shaped connecting block arranged at the bottom end of the frame, a leaf spring is arranged at the bottom end of the first U-shaped connecting block, and a second U-shaped connecting block is arranged at the bottom end of the leaf spring.

[0012] The beneficial effects of the utility model are:

[0013] 1. The structure of the utility model is scientific and novel. It uses the collaborative work of multiple components to achieve an efficient and stable plastic particle screening function. By setting the first screening component and the second screening component, the device can perform multi-stage screening, effectively improving the screening accuracy and efficiency, and ensuring that plastic particles of different particle sizes are accurately classified; in addition, the setting of the mobile component makes the entire screening device have good mobility and stability, which is convenient for flexible deployment and operation in different working environments, and improves the applicability and ease of use of the device.

[0014] 2. By setting up the first screening component and the second screening component, the screening process is made more detailed and efficient. Plastic particles usually have diverse particle size distributions and different physical properties. The first screening component can quickly screen out larger plastic particles through primary screening, effectively remove impurities and larger particles, and provide purer and more uniform pellets for subsequent screening; while the second screening component performs secondary screening on the basis of the primary screening, further refining the particle size distribution of the plastic particles, ensuring that the final product meets the expected standards in particle size and quality; in addition, the synergistic effect of multi-stage screening not only improves the overall screening efficiency, but also reduces the risk of screen hole clogging, extends the service life of the screening, and significantly improves the stability and continuity of the plastic particle production process.

[0015] 3. The setting of mobile components provides strong guarantees for the flexibility and stability of the screening device. Through the coordinated work of the frame, front axle, rear axle and buffer components, the screening device can effectively absorb and buffer vibration and impact during movement, ensuring the smooth progress of the screening process. At the same time, the structure of the mobile components enables the equipment to maintain good balance and stability under various ground conditions, reducing the fluctuation of screening accuracy caused by movement and improving the convenience of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a schematic structural diagram of a multi-stage screening device for plastic particles according to an embodiment of the present utility model;

[0018] Figure 2 This is a partial structural diagram of a multi-stage screening device for plastic particles according to an embodiment of the present utility model;

[0019] Figure 3 This is a schematic diagram of the partial structure of a box in a multi-stage screening device for plastic particles according to an embodiment of the present utility model;

[0020] Figure 4 yes Figure 2 A partial enlarged view of point A in the middle;

[0021] Figure 5 This is a schematic structural diagram of a first screening component and a second screening component in a multi-stage screening device for plastic particles according to an embodiment of the present utility model;

[0022] Figure 6 This is a schematic structural diagram of a moving component in a multi-stage screening device for plastic particles according to an embodiment of the present utility model;

[0023] Figure 7 The present invention is a schematic structural diagram of a buffer assembly in a multi-stage screening device for plastic particles according to an embodiment of the present invention.

[0024] In the picture:

[0025] 1. Box body; 101. Feed hole; 102. First discharge port; 103. Second discharge port; 104. Third discharge port; 105. Support plate; 106. Vibration motor; 2. Handrail; 3. Third discharge chute; 4. First screening assembly; 401. First discharge chute; 402. First elastic connector; 4021. Fixing plate; 4022. L-shaped connecting shaft; 4023. First fixing ring; 4024. Spring; 4025. Second fixing ring; 4026. Support shaft; 403. First screening box ; 404, first screening hole; 405, first positioning shaft; 5, second screening assembly; 501, second discharge chute; 502, second elastic connecting member; 503, connecting shaft; 504, second screening box; 505, second screening hole; 506, second positioning shaft; 6, mounting plate; 7, moving assembly; 701, frame; 702, front axle; 703, rear axle; 704, buffer assembly; 7041, first U-shaped connecting block; 7042, leaf spring; 7043, second U-shaped connecting block; 8, hopper. DETAILED DESCRIPTION

[0026] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. By referring to these contents, ordinary technicians in this field should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0027] According to an embodiment of the present utility model, a multi-stage screening device for plastic particles is provided.

[0028] The present invention will now be further described with reference to the accompanying drawings and specific embodiments. Figure 1-Figure 7 As shown, the multi-stage screening device for plastic particles according to an embodiment of the present invention includes a box body 1 (in addition, in specific applications, a control panel is provided on one side of the box body 1, and the control panel is electrically connected to the vibration motor 106. This is the prior art and will not be elaborated here), a handrail 2 is provided in the middle of one end of the box body 1, a third discharge chute 3 is provided through the bottom of one end of the box body 1, a first screening component 4 is provided through the middle of the other end of the box body 1, a second screening component 5 is provided through the bottom of the other end of the box body 1, mounting plates 6 are provided on both sides of the box body 1 (in addition, in specific applications, the mounting plate 6 is fixedly connected to the box body 1), a moving component 7 is provided at the bottom end of the box body 1, and a feed hopper 8 is provided through the top side of the box body 1.

[0029] With the help of the above-mentioned technical solution of the present invention, the structure of the present invention is scientific and novel, and the collaborative work of multiple components is utilized to realize an efficient and stable plastic particle screening function. By setting the first screening component 4 and the second screening component 5, the device can perform multi-stage screening, effectively improving the screening accuracy and efficiency, and ensuring that plastic particles of different particle sizes are accurately classified; in addition, the setting of the mobile component 7 makes the entire screening device have good mobility and stability, which is convenient for flexible deployment and operation in different working environments, and improves the applicability and ease of use of the device.

[0030] In one embodiment, a feed hole 101 cooperating with the feed hopper 8 is provided on one side of the top of the box body 1, a first discharge port 102 cooperating with the first screening component 4 is provided in the middle of one end of the box body 1, and a second discharge port 103 cooperating with the second screening component 5 is provided at the bottom of one end of the box body 1; a third discharge port 104 cooperating with the third discharge trough 3 is provided at the bottom of the other end of the box body 1, and a support plate 105 is provided at one end of the inner side of the box body 1 (in addition, in specific applications, the support plate 105 is fixedly connected to the box body 1), and a vibration motor 106 is provided at the top of the support plate 105 (in addition, in specific applications, the support plate 105 is fixedly connected to the vibration motor 106).

[0031] Vibrating motor 106 provides a stable vibration force, promoting uniform distribution and efficient screening of plastic particles, reducing screening time and energy consumption. The coordinated design of feed hole 101 and feed hopper 8 ensures uniform entry of plastic particles, reducing blockage and uneven material flow. The provision of multiple discharge ports 102, 103, and 104 enables orderly discharge at different screening stages, improving the continuity and efficiency of the production process. Vibrating motor 106, through connection with support plate 105, transmits the generated vibration force to box body 1, causing the entire device to produce regular vibratory motion. This vibration not only promotes the movement and separation of plastic particles within the screening assembly, improving the efficiency and accuracy of screening, but also ensures the continuity and stability of the screening process.

[0032] In one embodiment, for the above-mentioned first screening component 4, the first screening component 4 includes a first discharge chute 401 that passes through the middle of one end of the box body 1, first elastic connectors 402 are symmetrically provided on both sides of the inner top of the box body 1, and a first screening box 403 is provided between the two groups of first elastic connectors 402 (in addition, in specific applications, the inclination angle of the first screening box 403 is 25°, which can make the plastic particles that do not pass through the first screening holes 404 roll down to the first discharge chute 401 at a uniform speed), a plurality of first screening holes 404 are opened at the bottom end of the first screening box 403, and first positioning shafts 405 are provided on the bottom of both sides of the first screening box 403 through the mounting plate 6 (in addition, in specific applications, the mounting plate 6 is fixedly connected to the first positioning shaft 405); the first elastic connector 4 02 includes a fixed plate 4021 arranged on one side of the top inner side of the box body 1 (in addition, in specific applications, the fixed plate 4021 is fixedly connected to the box body 1), an L-shaped connecting shaft 4022 is provided at the bottom end of the fixed plate 4021, and a first fixing ring 4023 is sleeved on one end of the L-shaped connecting shaft 4022, and a spring 4024 is provided at the bottom end of the first fixing ring 4023, and a second fixing ring 4025 is provided at the bottom end of the spring 4024, and a support shaft 4026 fixedly connected to the first screening box 403 is provided through the inner side of the second fixing ring 4025, so that primary screening is achieved through the vibration force provided by the vibration motor 106 and the stable transmission of the first elastic connecting member 402, which can efficiently separate larger plastic particles from medium plastic particles, ensuring the smooth progress of the subsequent screening process.

[0033] The working principle of the first screening component 4 is as follows: the first discharge trough 401 is arranged in the middle of one end of the box body 1, passing through the box body, and is used to receive plastic particles that have not passed through the first screening holes 404; the first screening box 403 is located above the first discharge trough 401, with an inclination angle of 25°, to ensure that the plastic particles that have not passed through the screening holes can roll down to the first discharge trough 401 at a uniform speed; a plurality of first screening holes 404 are provided at the bottom of the first screening box 403 for primary screening to separate larger plastic particles; the first elastic connecting member 402 is symmetrically arranged on the box body. On both sides of the inner top, there are a fixing plate 4021, an L-shaped connecting shaft 4022, a first fixing ring 4023, a spring 4024, a second fixing ring 4025 and a supporting shaft 4026, which are fixedly linked to each other and elastically connected to the first screening box 403 through the spring 4024, ensuring that the first screening box 403 remains stable and has a certain elastic movement ability during the vibration process; the first positioning shaft 405 passes through the mounting plate 6, fixes the position of the first screening box 403, and ensures that the screening box does not move during the vibration process.

[0034] After the plastic particles enter the box body 1 through the feed hole 101, they first fall into the first screening box 403. The vibration force transmitted by the vibration motor 106 through the support plate 105 causes the first screening box 403 to vibrate, thereby promoting the movement and separation of the plastic particles on the screening holes 404. Larger plastic particles cannot pass through the screening holes 404, and thus roll down the inclined screening box 403 at a uniform speed to the first discharge chute 401, thereby achieving preliminary screening. The vibration force provided by the vibration motor 106 is transmitted to the first screening box 403 through the first elastic connecting member 402, causing it to produce regular vibration movement. At the same time, the spring 4024 in the first elastic connecting member 402 allows the first screening box 403 to have a certain elastic displacement during the vibration process, thereby reducing the impact of vibration on the overall structure and improving the stability and efficiency of screening. The medium-sized plastic particles screened through the screening holes 404 continue to enter the next-level screening assembly 5, while the larger particles that do not pass through the screening holes 404 are discharged through the first discharge chute 401, thereby achieving division of labor and cooperation in multi-stage screening.

[0035] In one embodiment, for the above-mentioned second screening component 5, the second screening component 5 includes a second discharge trough 501 that passes through the bottom of one end of the box body 1, and second elastic connectors 502 are symmetrically arranged on both sides of the inner bottom end of the box body 1 (in addition, in specific applications, the bottom end of the second elastic connector 502 is fixedly connected to the box body 1), and the second elastic connector 502 has the same structure as the first elastic connector 402, and the bottom end of the first elastic connector 402 is provided with a connecting shaft 503 fixedly connected to the second elastic connector 502, and a second screening box 504 is arranged between the two groups of second elastic connectors 502, and a plurality of second screening holes 505 are opened at the bottom end of the second screening box 504, and second positioning shafts 506 are provided on the bottom of both sides of the second screening box 504 through the mounting plate 6, so that the vibration force generated by the vibration motor 106 is stably transmitted to the second screening box 504 through the connecting shaft 503 and the second elastic connector 502, so that it generates regular vibration, thereby promoting the uniform distribution of plastic particles and secondary screening.

[0036] The working principle of the second screening component 5 is as follows: the second discharge trough 501 is arranged at the bottom of one end of the box body 1 and passes through the box body to receive the plastic particles that have not passed through the second screening holes 505; the second screening box 504 is installed above the second discharge trough 501 with an inclination angle of 25 degrees to ensure that the plastic particles that have not passed through the screening holes 505 can roll down to the second discharge trough 501 at a uniform speed. The bottom of the second screening box 504 is provided with a plurality of second screening holes 505, which are smaller in diameter than the first screening holes 404, and are used to achieve secondary screening and further refine the screening particle size; the second elastic connecting piece 502 is symmetrical It is arranged on both sides of the bottom end of the inner side of the box body 1, and has the same structure and working principle as the first elastic connecting member 402. It realizes elastic connection with the second screening box 504 through a spring to ensure that the screening box 504 remains stable during the vibration process and has a certain elastic movement ability; the bottom end of the first elastic connecting member 402 is provided with a connecting shaft 503, which is fixedly connected to the second elastic connecting member 502 to ensure coordinated work between the two elastic connecting members; the second positioning shaft 506 passes through the mounting plate 6 to fix the position of the second screening box 504 to prevent the screening box from generating excessive displacement during the vibration process.

[0037] After preliminary screening by the first screening component 4, the plastic particles enter the second screening component 5. The plastic particles first enter the second screening box 504 for further detailed screening. Since the diameter of the second screening hole 505 is smaller than that of the first screening hole 404, smaller particles can pass through the second screening hole 505, while larger particles are retained in the screening box 504. The vibration motor 106 transmits the vibration force to the second elastic connector 502 through the support plate 105 and the connecting shaft 503. The second elastic connector 502 transmits the vibration force to the second screening box 504 through the support shaft and the spring, causing it to produce regular vibration movement. The spring in the second elastic connector 502 allows the second screening box 504 to have a certain elastic displacement during the vibration process, ensuring smooth transmission of the vibration force and reducing the impact of vibration on the overall structure. The smaller plastic particles screened by the second screening hole 505 fall into the third discharge chute 3, while the medium plastic particles that do not pass through the screening hole 505 are discharged through the second discharge chute 501, realizing the division of labor and cooperation of multi-stage screening.

[0038] In one embodiment, the mobile assembly 7 includes a frame 701 disposed at the bottom end of the box body 1, a front axle 702 is disposed on one side of the bottom end of the frame 701 (in addition, in a specific application, front wheels are disposed at both ends of the front axle 702), a rear axle 703 is disposed on the other side of the bottom end of the frame 701 (in addition, rear wheels are disposed at both ends of the rear axle 703), and buffer assemblies 7 connected to the frame 701 are symmetrically disposed on both sides of the top ends of the front axle 702 and the rear axle 703. 04 (in addition, in specific applications, the top ends of the front axle 702 and the rear axle 703 are fixedly connected to the buffer assembly 704); the buffer assembly 704 includes a first U-shaped connecting block 7041 arranged at the bottom end of the frame 701, a leaf spring 7042 is arranged at the bottom end of the first U-shaped connecting block 7041, and a second U-shaped connecting block 7043 is arranged at the bottom end of the leaf spring 7042, so that the screening device can move freely between different working environments and production lines to adapt to changing production needs and spatial layouts.

[0039] In addition, it should be noted that the leaf spring 7042 is made of multiple arc-shaped elastic materials stacked together, has good fatigue performance and durability, and can maintain stable elastic performance during long-term use. At the same time, the wave design of the leaf spring further enhances its cushioning effect and load-bearing capacity. This is an existing technology and will not be elaborated here.

[0040] The working principle of the mobile assembly 7 is as follows: the frame 701 is arranged at the bottom of the box body 1, serving as the main structure of the entire mobile assembly 7, providing basic support and framework for the equipment; the front axle 702 is installed on one side of the bottom end of the frame 701, responsible for supporting the front wheels, and the rear axle 703 is installed on the other side of the bottom end of the frame 701, responsible for supporting the rear wheels. The front axle 702 and the rear axle 703 jointly ensure the balance and stability of the screening device during movement; the buffer assembly 704 is symmetrically arranged at the top of the front axle 702 and the rear axle 703, connected to the frame 701, and is mainly used to absorb vibration and impact during movement, protect the equipment structure and Internal components; among them, the first U-shaped connecting block 7041 is fixed at the bottom end of the frame 701, serving as the starting connection point of the buffer system; the leaf spring 7042 is installed at the bottom end of the first U-shaped connecting block 7041 to provide elastic support and absorb vertical and horizontal impact forces during movement; the second U-shaped connecting block 7043 is installed at the bottom end of the leaf spring 7042 and connected to the upper part of the buffer assembly 704 to ensure effective transmission and dispersion of the buffer force. The buffer assembly 704 effectively reduces the impact force transmission of the screening device during movement and operation through elastic connection and vibration absorption, thereby extending the service life of the device and reducing maintenance costs.

[0041] In order to facilitate understanding of the above technical solutions of the present invention, the working principle or operation method of the present invention in actual process is described in detail below.

[0042] In actual application, the plastic particles to be screened are first put into the screening box 1 through the conveying device, and the operator starts the vibration motor 106, which starts to run at high speed. The internal eccentric wheel generates periodic centrifugal force to form a continuous vibration force.

[0043] The vibration force is transmitted to the first elastic connecting member 402 through the support plate 105. The spring 4024 in the first elastic connecting member 402 buffers and elastically transmits the vibration force to ensure that the vibration force is smoothly transmitted to the first screening box 403. The first screening box 403 is installed at one end of the box body 1 at an inclination angle of 25°. The plastic particles are primarily screened through multiple first screening holes 404. Under the action of vibration, larger plastic particles pass through the first screening holes 404 and enter the first discharge trough 401, while smaller particles remain in the screening box 403 and continue to move downward.

[0044] The plastic particles after primary screening further flow into the second screening component 5. The second screening box 504 is connected to the second elastic connecting member 502 through the connecting shaft 503 to ensure that the vibration force can also be effectively transmitted to the secondary screening. The diameter of the second screening hole 505 is smaller than that of the first screening hole 404, and the plastic particles with smaller particle size can be screened out more finely and enter the second discharge trough 501. The larger particles that do not pass through the screening hole 505 are rolled down at a uniform speed into the second discharge trough 501 to achieve secondary screening.

[0045] During the screening process, the moving component 7 ensures the stability and ease of operation of the screening device during movement. The frame 701 serves as the basis of the overall structure and is connected by the front axle 702 and the rear axle 703 to ensure the balance and stability of the equipment during movement. The buffer component 704 consists of a first U-shaped connecting block 7041, a leaf spring 7042 and a second U-shaped connecting block 7043, which can effectively absorb and buffer the vibration and impact generated during movement, and protect the screening box 1 and the internal screening components from damage. Thus, through the coordinated work of multiple components of the screening device, an efficient and stable plastic particle screening function is achieved.

[0046] In the present invention, unless otherwise clearly stipulated and limited, the terms "install", "set", "connect", "fix", "screw" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A multi-stage screening device for plastic particles, comprising a box (1), characterized in that: A handrail (2) is provided in the middle of one end of the box body (1), a third discharge chute (3) is provided through the bottom of one end of the box body (1), a first screening assembly (4) is provided through the middle of the other end of the box body (1), a second screening assembly (5) is provided through the bottom of the other end of the box body (1), mounting plates (6) are provided on both sides of the box body (1), a moving assembly (7) is provided at the bottom of the box body (1), and a feed hopper (8) is provided through one side of the top of the box body (1).

2. A multi-stage screening device for plastic particles according to claim 1, characterized in that: A feeding hole (101) cooperating with the feeding hopper (8) is provided on one side of the top of the box body (1), a first discharge port (102) cooperating with the first screening component (4) is provided in the middle of one end of the box body (1), and a second discharge port (103) cooperating with the second screening component (5) is provided at the bottom of one end of the box body (1).

3. A multi-stage screening device for plastic particles according to claim 2, characterized in that: A third discharge port (104) cooperating with the third discharge trough (3) is provided at the bottom of the other end of the box body (1), a support plate (105) is provided at one end inside the box body (1), and a vibration motor (106) is provided at the top end of the support plate (105).

4. A multi-stage screening device for plastic particles according to claim 1, characterized in that: The first screening component (4) comprises a first discharge trough (401) penetrating the middle of one end of the box body (1), first elastic connectors (402) are symmetrically arranged on both sides of the inner top of the box body (1), a first screening box (403) is arranged between two groups of the first elastic connectors (402), a plurality of first screening holes (404) are opened at the bottom end of the first screening box (403), and first positioning shafts (405) are arranged at the bottom of both sides of the first screening box (403) penetrating the mounting plate (6).

5. A multi-stage screening device for plastic particles according to claim 4, characterized in that: The first elastic connecting member (402) comprises a fixing plate (4021) arranged on one side of the top inner side of the box body (1); an L-shaped connecting shaft (4022) is provided at the bottom end of the fixing plate (4021); a first fixing ring (4023) is sleeved on one end of the L-shaped connecting shaft (4022); a spring (4024) is provided at the bottom end of the first fixing ring (4023); a second fixing ring (4025) is provided at the bottom end of the spring (4024); a support shaft (4026) fixedly connected to the first screening box (403) is provided through the inner side of the second fixing ring (4025).

6. A multi-stage screening device for plastic particles according to claim 4, characterized in that: The second screening component (5) includes a second discharge trough (501) penetrating the bottom of one end of the box body (1), second elastic connectors (502) are symmetrically arranged on both sides of the inner bottom end of the box body (1), and the second elastic connector (502) has the same structure as the first elastic connector (402), and the bottom end of the first elastic connector (402) is provided with a connecting shaft (503) fixedly connected to the second elastic connector (502), a second screening box (504) is provided between the two groups of the second elastic connectors (502), and a plurality of second screening holes (505) are opened at the bottom end of the second screening box (504), and second positioning shafts (506) are provided at the bottom of both sides of the second screening box (504) penetrating the mounting plate (6).

7. A multi-stage screening device for plastic particles according to claim 1, characterized in that: The moving assembly (7) comprises a frame (701) arranged at the bottom end of the box (1), a front axle (702) being arranged on one side of the bottom end of the frame (701), a rear axle (703) being arranged on the other side of the bottom end of the frame (701), and buffer assemblies (704) connected to the frame (701) being symmetrically arranged on both sides of the top ends of the front axle (702) and the rear axle (703).

8. A multi-stage screening device for plastic particles according to claim 7, characterized in that: The buffer assembly (704) comprises a first U-shaped connecting block (7041) arranged at the bottom end of the vehicle frame (701), a leaf spring (7042) being arranged at the bottom end of the first U-shaped connecting block (7041), and a second U-shaped connecting block (7043) being arranged at the bottom end of the leaf spring (7042).

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