Degradable plastic particle screening device

Abstract

The utility model relates to the technical field of plastic particle screening, in particular to a degradable plastic particle screening device which comprises a screening bin, sliding rods are connected to the two opposite sides of the screening bin in a sliding mode, a screening frame is fixed between the two opposite sides of the sliding rods, and a scraping plate is connected to the inner top surface of the screening frame in a sliding mode. A discharging opening is formed in the screening bin, a blocking plate is clamped in the discharging opening, limiting plates are fixed to the inner walls of the two opposite sides of the screening bin, a collecting frame is slidably clamped in the limiting plates, the screening device further comprises a shaking part and a sliding part, and the shaking part is used for driving the screening frame to shake for screening. The sliding piece is used for driving the scraper to slide horizontally. The multiple screening frames can be driven by the shaking piece to shake in a reciprocating mode, particles of different sizes can be separated out, multi-stage screening is achieved, screening is comprehensive, the screening quality is improved, screened plastic particles can be rapidly discharged, and the discharging efficiency of the plastic particles is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic particle screening, in particular to a degradable plastic particle screening device. Background Art

[0002] Plastic is a high molecular compound made from monomers through addition polymerization or condensation polymerization. Plastic particles refer to granular plastics. Degradable plastic particles need to be screened during the production process to remove unqualified degradable plastic particles with small particle size.

[0003] An existing patent (publication number: CN217392952U) discloses a device for screening degradable plastic particles. The device comprises a base plate, a tilted screening frame hinged above the base plate, and a screening mesh panel inside the screening frame. A motor drives a disc to rotate, which in turn drives a hanging plate via a drive rod hinged to the disc, causing the screening frame to swing, thereby screening the degradable plastic particles. However, in the prior art, plastic particles contain a variety of different particle sizes, making multi-stage screening impossible. This results in incomplete screening and reduced screening quality. Utility Model Content

[0004] The purpose of the utility model is to solve the problem in the prior art that it is not convenient to separate plastic particles of different particle sizes through multi-stage screening, resulting in incomplete separation and inconvenience in quickly discharging the screened plastic particles, and to propose a degradable plastic particle screening device.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A degradable plastic particle screening device comprises a screening bin, wherein two opposite sides of the screening bin are slidably connected to slide rods, a screening frame is fixed between the two opposite sides of the slide rods, a scraper is slidably connected to the top surface of the screening frame, a discharge port is provided in the screening bin, a blocking plate is clamped in the discharge port, and limiting plates are fixed to the inner walls of the two opposite sides of the screening bin, and a collection frame is slidably clamped in the limiting plates;

[0007] Also includes:

[0008] A shaking member, the shaking member is used to drive the screening frame to shake and screen;

[0009] A sliding member is used to drive the scraper to slide horizontally.

[0010] Preferably, the shaking member includes:

[0011] A fixing plate, wherein two fixing plates are provided and the two fixing plates are fixed on the upper and lower sides of the side walls of the screening bin;

[0012] a first motor, wherein the first motor is fixed to the fixing plate;

[0013] A rotating rod, the rotating rod being fixed to the output end of the first motor;

[0014] An eccentric wheel is fixed on the rotating rod.

[0015] Preferably, the shaking member further comprises:

[0016] a notch, the notch being provided on the slide bar;

[0017] Sliding rods, the sliding rods are slidably connected to opposite sides of the screening bin, and the sliding rods are fixedly connected to the screening frame;

[0018] A spring is sleeved on the sliding rod, and two ends of the spring are fixedly connected to the inner wall of the screening bin and the outer wall of the screening frame respectively.

[0019] Preferably, the sliding member comprises:

[0020] A mounting seat, the mounting seat being fixed on the screening frame;

[0021] a second motor, the second motor being fixed on the mounting base;

[0022] a bidirectional screw, the bidirectional screw being fixed to the output end of the second motor and being rotatably connected to the mounting seat;

[0023] An L-shaped slider is threadedly sleeved on the bidirectional screw rod.

[0024] Preferably, the bidirectional screw rod is provided with relatively symmetrical spiral grooves, the L-shaped slider is provided with an external thread that is threadedly sleeved with the bidirectional screw rod, and two L-shaped sliders are provided, and the two L-shaped sliders slide in the same direction.

[0025] Preferably, there are three screening frames, and the rocking members are arranged corresponding to the number of the screening frames. The three screening frames are all provided with sieve holes arranged in a linear distribution, and the apertures of the sieve holes in the three screening frames are different.

[0026] Compared with the prior art, the present invention has the following advantages:

[0027] 1. When screening, the material first enters the top screening frame. Under the action of the shaking member, the material will be shaken and screened in the screening frame. Larger particles will be retained on the screening frame, while smaller particles will pass through the sieve holes and fall into the screening frame of the next layer. Similarly, the material will be screened step by step through the three layers of screening frames, and finally particles of different sizes will be separated, thus achieving multi-stage screening, making the screening more comprehensive and improving the screening quality.

[0028] 2. The utility model drives the bidirectional screw to rotate through the second motor to make the L-shaped slider that cooperates with the thread slide, and drives the scraper to slide close to the inner top surface of the screening frame. The scraper will effectively push the plastic particles that remain in the screening frame after screening to the position of the discharge port and smoothly fall into the collection frame below, so that the screened plastic particles can be quickly discharged, thereby improving its discharge efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the overall structure of a degradable plastic particle screening device proposed in the utility model;

[0030] Figure 2 A degradable plastic particle screening device proposed in this utility model Figure 1 Schematic diagram of the connection and installation structure of the three screening frames and the shaking parts;

[0031] Figure 3 A degradable plastic particle screening device proposed in this utility model Figure 1 Schematic diagram of the connection and installation structure of the middle scraper, sliding member and screening frame;

[0032] Figure 4 A degradable plastic particle screening device proposed in this utility model Figure 1 Schematic diagram of the connection and installation structure between the middle screening frame and the collection frame.

[0033] In the picture:

[0034] 1. Screening bin; 2. Slide rod; 21. Fixed plate; 22. First motor; 23. Rotating rod; 24. Eccentric wheel; 25. Notch; 26. Slide rod; 27. Spring; 3. Screening frame; 4. Scraper; 41. Mounting seat; 42. Second motor; 43. Bidirectional screw; 44. L-shaped slider; 5. Feeding port; 6. Blocking plate; 7. Limiting plate; 8. Collection frame. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0036] Reference Figures 1-4A degradable plastic particle screening device includes a screening bin 1, with slide bars 2 slidably connected to opposite sides of the screening bin 1. A screening frame 3 is fixed between the opposite sides of the slide bars 2. A scraper 4 is slidably connected to the top surface of the screening frame 3. A discharge port 5 is provided in the screening bin 1, and a blocking plate 6 is clamped into the discharge port 5. Limiting plates 7 are fixed to the inner walls of the opposite sides of the screening bin 1, and a collection frame 8 is slidably clamped into the limiting plates 7. The limiting plates 7 are used to limit the movement range of the collection frame 8, ensuring that the collection frame 8 does not fall off or move too much during the screening process. The collection frame 8 is used to collect the screened material and can be easily removed and emptied for further use.

[0037] A degradable plastic particle screening device also includes a shaking member and a sliding member. The shaking member is used to drive the screening frame 3 to shake and screen, and the sliding member is used to drive the scraper 4 to slide horizontally.

[0038] Furthermore, the shaking member includes a fixed plate 21, a first motor 22, a rotating rod 23 and an eccentric wheel 24. There are two fixed plates 21, and the two fixed plates 21 are fixed to the upper and lower sides of the side wall of the screening bin 1, which can ensure the stability of the shaking member on the screening bin 1 and allow it to produce effective shaking. The first motor 22 is fixed to the fixed plate 21, the rotating rod 23 is fixed to the output end of the first motor 22, and the eccentric wheel 24 is fixed to the rotating rod 23. The eccentric wheel 24 generates centrifugal force as the rotating rod 23 rotates. Since the mass center of the eccentric wheel 24 does not coincide with the rotation center, when the rotating rod 23 rotates, the eccentric wheel 24 generates a periodic force, causing the screening bin 1 or the screening frame 3 to shake.

[0039] Furthermore, the shaking member also includes a notch 25, a sliding rod 26 and a spring 27. The notch 25 is provided on the sliding rod 2. The notch 25 provides a sliding track for the sliding rod 26. The shape and size of the notch 25 match the sliding rod 26 to ensure that the sliding rod 26 can slide smoothly therein. The sliding rod 26 is slidably connected to the opposite sides of the screening bin 1. The sliding rod 26 is fixedly connected to the screening frame 3. The spring 27 is sleeved on the sliding rod 26. The two ends of the spring 27 are respectively fixedly connected to the inner wall of the screening bin 1 and the outer wall of the screening frame 3. The function of the spring 27 is to provide a buffer and reset force so that the screening frame 3 can remain stable during the shaking process and can quickly return to its initial position after the vibration ends.

[0040] Furthermore, the sliding part includes a mounting seat 41, a second motor 42, a bidirectional screw rod 43 and an L-shaped slider 44. The mounting seat 41 is fixed on the screening frame 3, the second motor 42 is fixed on the mounting seat 41, the bidirectional screw rod 43 is fixed at the output end of the second motor 42, the bidirectional screw rod 43 is rotatably connected to the mounting seat 41, and the L-shaped slider 44 is threadedly sleeved on the bidirectional screw rod 43.

[0041] Furthermore, the bidirectional screw 43 is provided with relatively symmetrical spiral grooves, and the L-shaped slider 44 is provided with external threads that are threadedly engaged with the bidirectional screw 43. There are two L-shaped sliders 44, and the two L-shaped sliders 44 slide in the same direction. The spiral grooves match the external threads in the L-shaped sliders 44, thereby enabling the L-shaped sliders 44 to slide on the bidirectional screw 43.

[0042] Furthermore, there are three screening frames 3 with a multi-stage screening function, which can simultaneously separate particles of different sizes. The number of shaking parts corresponds to the number of screening frames 3. This design ensures that each screening frame 3 can independently and effectively perform screening work. The three screening frames 3 are all provided with sieve holes arranged in a linear distribution. The sieve holes in the three screening frames 3 have different apertures. The different apertures can separate particles of different sizes, and the aperture of the top screening frame 3 is larger than that of the screening frame 3 below it, so that multi-stage screening can be performed step by step.

[0043] The functional principle of this utility model can be explained through the following operation modes:

[0044] When the eccentric wheel 24 rotates, the three eccentric wheels 24 on the outside are synchronously placed in the recess 25 to rotate. When the eccentric wheel 24 rotates, it will contact the slide bar 2, and the slide bar 2 is forced to slide and stretch the spring 27, so that the three screening frames 3 slide forward. As the eccentric wheel 24 continues to rotate, when it rotates to disengage from the slide bar 2, the spring 27 releases the extrusion force and drives the sliding bar 26 to reset, so that the screening frame 3 slides back. As the eccentric wheel 24 continues to rotate, the three screening frames 3 can achieve reciprocating back and forth rocking, so that the plastic particles can be screened on each layer of the screening frame 3 and fall into the next layer of the screening frame 3 for re-screening, so that multi-stage screening can be achieved, so that plastic particles of different particle sizes can be screened comprehensively, thereby improving the screening quality.

[0045] After screening is complete, the collection frame 8 is inserted into the limiting plate 7 and pushed forward to slide it below the screen frame. The operator then pulls the blocking plate 6 upward to completely disengage the discharge port 5, thereby ensuring unobstructed access to the discharge port 5. Next, the second motor 42 is started, which then drives the bidirectional screw 43 to begin rotating within the mounting base 41. As the bidirectional screw 43 rotates, the L-shaped sliders 44, each threadedly mated with it at each end, respond synchronously, sliding along the axial direction of the bidirectional screw 43, i.e., toward the discharge port 5. As the L-shaped sliders 44 slide, the scraper 4 mounted at its bottom slides against the inner top surface of the screening frame 3. During this process, the scraper 4 effectively pushes the plastic particles remaining in the screening frame 3 after screening to the discharge port 5. These pushed plastic particles then smoothly fall through the discharge port 5 into the collection frame 8 below, completing rapid discharge and improving discharge efficiency.

[0046] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A degradable plastic particle screening device, comprising a screening bin (1), characterized in that: The two opposite sides of the screening bin (1) are slidably connected to slide bars (2), a screening frame (3) is fixed in the middle of the two opposite sides of the slide bar (2), a scraper (4) is slidably connected to the inner top surface of the screening frame (3), a discharge port (5) is provided in the screening bin (1), a blocking plate (6) is clamped in the discharge port (5), and a limiting plate (7) is fixed to the inner walls of the two opposite sides of the screening bin (1), and a collecting frame (8) is slidably clamped in the limiting plate (7); Also includes: A shaking member, the shaking member is used to drive the screening frame (3) to shake and screen; A sliding member is used to drive the scraper (4) to slide horizontally.

2. A degradable plastic particle screening device according to claim 1, characterized in that: The shaking member includes: A fixed plate (21), wherein two fixed plates (21) are provided, and the two fixed plates (21) are fixed on the upper and lower sides of the side wall of the screening bin (1); a first motor (22), the first motor (22) being fixed on the fixing plate (21); A rotating rod (23), wherein the rotating rod (23) is fixed to the output end of the first motor (22); An eccentric wheel (24) is fixed on the rotating rod (23).

3. The degradable plastic particle screening device according to claim 2, characterized in that: The shaking member further comprises: a notch (25), the notch (25) being provided on the slide bar (2); Sliding rods (26), the sliding rods (26) are slidably connected to opposite sides of the screening bin (1), and the sliding rods (26) are fixedly connected to the screening frame (3); A spring (27), wherein the spring (27) is sleeved on the sliding rod (26), and the two ends of the spring (27) are fixedly connected to the inner wall of the screening bin (1) and the outer wall of the screening frame (3) respectively.

4. The degradable plastic particle screening device according to claim 1, characterized in that: The sliding member comprises: A mounting seat (41), wherein the mounting seat (41) is fixed on the screening frame (3); a second motor (42), the second motor (42) being fixed on the mounting seat (41); a bidirectional screw rod (43), the bidirectional screw rod (43) being fixed to the output end of the second motor (42), and the bidirectional screw rod (43) being rotatably connected to the mounting seat (41); An L-shaped slider (44) is threadedly sleeved on the bidirectional screw rod (43).

5. The degradable plastic particle screening device according to claim 4, characterized in that: The bidirectional screw rod (43) is provided with relatively symmetrical spiral grooves, and the L-shaped slider (44) is provided with an external thread threadedly sleeved with the bidirectional screw rod (43). There are two L-shaped sliders (44), and the two L-shaped sliders (44) slide in the same direction.

6. The degradable plastic particle screening device according to claim 1, characterized in that: There are three screening frames (3), and the shaking members are arranged in a number corresponding to the number of the screening frames (3). The three screening frames (3) are all provided with sieve holes arranged in a linear distribution, and the sieve holes in the three screening frames (3) have different apertures.

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