A cleaning device for plastic particles

CN224823696UActive Publication Date: 2026-10-09BEIZAI NEW MATERIALS (TIANJIN) TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202522255235.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-10-24
Publication Date
2026-10-09
Estimated Expiration
2035-10-24

AI Technical Summary

Technical Problem

[0003]有鉴于此,本实用新型旨在提出一种塑料颗粒的清洗装置,以解决传统静态清洗中塑料颗粒堆叠导致的局部清洁不彻底,影响后续生产的问题

Benefits of technology

[0014](1)本实用新型所述的一种塑料颗粒的清洗装置,设置了盛料笼,盛料笼的网眼结构配合转轴带动的旋转动作,使清洗水可均匀接触笼内每颗颗粒,避免传统静态清洗中颗粒堆叠导致的局部清洁不彻底问题。

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a kind of cleaning device of plastic particles, including box, cleaning assembly, driving assembly and rotation-stopping component, cleaning assembly is fixedly arranged above box, driving assembly is fixedly installed in box, the upper end of cleaning assembly is fixedly arranged rotation-stopping component, driving assembly is used to drive cleaning assembly to rotate, cleaning assembly can rotate and wash inside plastic particles, rotation-stopping component is used to fix the relative position of the inlet of cleaning assembly and box.The utility model discloses a kind of cleaning device of plastic particles, through the mesh structure cooperation rotating shaft of material cage drives rotating action, so that cleaning water can evenly contact every particle in cage, to solve the problem of local cleaning incompletely caused by particle stacking in traditional static cleaning.
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Description

Technical Field

[0001] This utility model belongs to the field of plastic particle cleaning, and in particular relates to a plastic particle cleaning device. Background Technology

[0002] Plastic granules are the original form of the plastics industry and its core raw material. They are primarily composed of high-molecular polymers such as polyethylene (PE), polypropylene (PP), and polyvinyl chloride (PVC), and are in the form of fine granules. Their color can be customized to be transparent, white, or colored. The applications of plastic granules cover almost every aspect of modern industry and daily life. PE granules, with their good flexibility, are commonly used to make plastic films, pipes, and shopping bags; PP granules, with their strong heat resistance, can be used to produce appliance casings, automotive interior parts, and disposable tableware; PVC granules, with their low cost and high plasticity, are widely used in building pipes, door and window profiles, and toys; and PS granules are suitable for making foam cushioning materials and transparent packaging boxes. However, some plastic granules have oil, impurities, or dust on their surface and need to be cleaned before proceeding to the next process. Traditional cleaning of plastic granules often uses static cleaning, and the stacking of granules can lead to incomplete cleaning in certain areas, causing problems that may affect subsequent production. Utility Model Content

[0003] In view of this, the present invention aims to provide a cleaning device for plastic particles to solve the problem of incomplete local cleaning caused by the accumulation of plastic particles in traditional static cleaning, which affects subsequent production.

[0004] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0005] A plastic granule cleaning device includes a housing, a cleaning component, a drive component, and an anti-rotation component. The cleaning component is fixedly installed on the top of the housing, the drive component is fixedly installed inside the housing, and the anti-rotation component is fixedly installed on the upper end of the cleaning component. The drive component is used to drive the cleaning component to rotate, and the cleaning component can rotate and clean the plastic granules inside. The anti-rotation component is used to fix the relative position of the inlet of the cleaning component and the housing.

[0006] Furthermore, the cleaning assembly includes a washing tank, a rotating shaft, and a material holding cage. The washing tank is fixedly installed on the upper end of the housing. A cover plate is hinged to one side of the washing tank. The rotating shaft is rotatably installed inside the washing tank. The material holding cage is fixedly sleeved around the rotating shaft and is used to hold plastic granules.

[0007] Furthermore, the cover plate is hinged to the upper end of the washing pool, and a pneumatic door closer is provided between the cover plate and the washing pool.

[0008] Furthermore, the material cage has a mesh around its perimeter and an opening, with one side of the cage door hinged to the opening, and the other side of the cage door detachably mounted on one side of the material cage via a snap fastener.

[0009] Furthermore, the drive assembly includes an electromagnetic brake, a servo motor, a synchronous belt, a synchronous pulley, and a drive shaft. The drive shaft is rotatably disposed between the washing pool and the housing. The active side of the electromagnetic brake is fixedly connected to one end of the drive shaft, and the passive side of the electromagnetic brake is fixedly connected to one end of the rotating shaft. A synchronous pulley is fixedly sleeved around the outer periphery of the drive shaft. The outer periphery of the synchronous pulley and the outer periphery of the output shaft of the servo motor are connected by a synchronous belt to form a synchronous transmission structure. The servo motor is fixedly installed inside the housing.

[0010] Furthermore, the anti-rotation assembly includes a support plate, a connecting rod, a pressure rod, and a pressure head. Two support plates are fixedly installed at the upper end of the washing pool. The two support plates are arranged parallel to each other. One end of the connecting rod is hinged between the two support plates. The other end of the connecting rod is fixedly connected to one end of the pressure rod. The other end of the pressure rod is fixedly equipped with a pressure head, which can be close to or away from the rotating shaft.

[0011] Furthermore, the anti-rotation assembly also includes a U-shaped frame, a support rod, a connecting piece, and a handle. The outer side of each support plate is hinged to one side wall of the open end of the U-shaped frame. The other end of the U-shaped frame is fixedly installed with a handle. The support rod is fixedly installed inside the U-shaped frame. The outer periphery of the support rod is rotatably sleeved with one end of two connecting pieces. The two connecting pieces are arranged parallel to each other. The other end of each connecting piece is hinged to both sides of the middle of the connecting rod.

[0012] Furthermore, a water pipe is installed inside the box, with one end of the water pipe connected to a washing pool and the other end connected to an external sewage treatment device. A gate valve is installed on the water pipe.

[0013] Compared with the prior art, the plastic particle cleaning device of this utility model has the following advantages:

[0014] (1) The plastic particle cleaning device of the present invention is provided with a material holding cage. The mesh structure of the material holding cage, combined with the rotation driven by the rotating shaft, allows the cleaning water to contact each particle in the cage evenly, avoiding the problem of incomplete cleaning caused by particle stacking in traditional static cleaning.

[0015] (2) The plastic particle cleaning device described in this utility model has a pneumatic door closer that can stably support the open state of the cover plate, eliminating the need for manual hand-holding, reducing the intensity of operation, and preventing water splashing during cleaning after the cover plate is closed, thus keeping the environment clean.

[0016] (3) The plastic particle cleaning device described in this utility model has feet installed around the lower end of the box, which can effectively absorb the vibration generated during the operation of the device. The feet can buffer this vibration through their own structure, preventing the vibration from causing the connection of the box and internal components such as water pipes and drive shafts to loosen, ensuring the transmission stability of each component, and extending the overall service life of the device.

[0017] (4) The plastic granule cleaning device of the present invention is equipped with an anti-rotation component. When loading or unloading is required, it is impossible to ensure that the cage door of the material cage is not facing outward. The material cage can be manually rotated to the required angle, which facilitates the subsequent loading operation. The manual control can also frequently adjust the axial position of the material cage as needed. Attached Figure Description

[0018] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0019] Figure 1 This is a schematic diagram of the overall structure of a plastic particle cleaning device according to an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the cleaning assembly described in an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the driving component described in an embodiment of the present utility model;

[0022] Figure 4 This is a schematic diagram of the anti-rotation component described in an embodiment of the present utility model;

[0023] Figure 5 This is a schematic diagram showing the connection relationship between the washing pool and the water pipes in an embodiment of this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1-Box body; 11-Water pipe; 12-Gate valve; 13-Foot; 2-Cleaning assembly; 21-Washing pool; 22-Cover plate; 221-Pneumatic door closer; 23-Rotating shaft; 24-Material cage; 241-Snap fastener; 242-Cage door; 3-Drive assembly; 31-Electromagnetic brake; 32-Servo motor; 33-Synchronous belt; 34-Synchronous pulley; 35-Drive shaft; 4-Anti-rotation assembly; 41-Support plate; 42-Connecting rod; 43-Pressure rod; 44-Pressure head; 45-U-shaped frame; 46-Support rod; 47-Connecting piece; 48-Handle. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0027] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] like Figure 1 As shown, a plastic particle cleaning device includes a housing 1, a cleaning component 2, a driving component 3, and an anti-rotation component 4. The cleaning component 2 is fixedly installed on the top of the housing 1, the driving component 3 is fixedly installed inside the housing 1, and the anti-rotation component 4 is fixedly installed on the upper end of the cleaning component 2. The driving component 3 is used to drive the cleaning component 2 to rotate, and the cleaning component 2 can rotate and clean the plastic particles inside. The anti-rotation component 4 is used to control the rotation or stop of the cleaning component 2.

[0031] like Figure 1 and Figure 2As shown, the cleaning assembly 2 includes a washing tank 21, a rotating shaft 23, and a material holding cage 24. The washing tank 21 is fixedly installed on the upper end of the housing 1. A cover plate 22 is hinged to one side of the washing tank 21. The rotating shaft 23 is rotatably installed inside the washing tank 21. The material holding cage 24 is fixedly sleeved around the rotating shaft 23. The material holding cage 24 is used to hold plastic granules. The cover plate 22 is hinged to the upper end of the washing tank 21. A pneumatic door closer 221 is installed between the cover plate 22 and the washing tank 21. The pneumatic door closer 221 is existing technology, and its model is HFX08. The material holding cage 24 has a mesh around its perimeter. A cage door 242 is installed on one side of the material holding cage 24 via a buckle 241. When the cleaning assembly 2 is working, the pneumatic door closer 221 first supports and fixes the cover plate 22 hinged to the upper end of the washing tank 21 to prevent the cover plate 22 from being blocked. The cage closes automatically, then the buckle 241 on one side of the material cage 24 is released, the cage door 242 is opened, and the plastic granules to be cleaned are loaded into the material cage 24. After loading, the cage door 242 is closed and the buckle 241 is fastened to prevent the granules from falling during cleaning. Then, the pneumatic door closer 221 is retracted, the gate valve 12 is closed, sufficient cleaning water is injected into the washing tank 21, the cover plate 22 is closed, the drive component 3 drives the rotating shaft 23 to rotate, and the rotating shaft 23 synchronously drives the material cage 24, which is fixedly sleeved on the outside, to rotate in the washing tank 21. The mesh on the outside of the material cage 24 allows the cleaning water to fully penetrate. The granules continue to turn over during rotation, and the surface oil and impurities are washed away and removed. After cleaning, the drive component 3 is turned off, the cover plate 22 is raised again, the buckle 241 is released, the cage door 242 is opened, and the cleaned granules are poured out.

[0032] A material collection cage 24 is provided. The mesh structure of the material collection cage 24, combined with the rotation driven by the rotating shaft 23, allows the cleaning water to evenly contact each particle in the cage, avoiding the problem of incomplete cleaning caused by particle stacking in traditional static cleaning. In addition, the closed design of the material collection cage 24 can prevent particles from being lost with the water flow, avoiding the problem of plastic particle loss. The pneumatic door closer 221 matched with the cover plate 22 can stably support the cover plate 22 in the open state, eliminating the need for manual handling, reducing the intensity of operation, and the cover plate 22 can prevent water splashing during cleaning, keeping the environment clean.

[0033] like Figure 3As shown, the drive assembly 3 includes an electromagnetic brake 31, a servo motor 32, a synchronous belt 33, a synchronous pulley 34, and a drive shaft 35. The drive shaft 35 is rotatably mounted between the washing tank 21 and the housing 1. The active side of the electromagnetic brake 31 is fixedly connected to one end of the drive shaft 35, and the passive side of the electromagnetic brake 31 is fixedly connected to one end of the rotating shaft 23. The synchronous pulley 34 is fixedly sleeved around the outer periphery of the drive shaft 35. The outer periphery of the synchronous pulley 34 and the outer periphery of the output shaft of the servo motor 32 are connected by the synchronous belt 33 to form a synchronous transmission structure. The servo motor 32 is fixedly installed inside the housing 1. The servo motor 32 is existing technology, and its model number is ACM1S-08008H2E1-M17S. MS30 and electromagnetic brake 31 are existing technologies. The model of electromagnetic brake 31 is FX-YH.YN. When plastic granules are loaded into the material cage 24, the controller is turned on. The controller controls the electromagnetic brake 31 to connect the drive shaft 35 and the rotating shaft 23. At this time, the controller controls the servo motor 32 to rotate, and under the action of the synchronous wheel 34, it drives the synchronous wheel 34 to rotate, which in turn drives the drive shaft 35 and the rotating shaft 23 to rotate, thereby driving the material cage 24 to rotate and evenly cleaning the plastic granules in the material cage 24.

[0034] like Figure 4 As shown, the anti-rotation assembly 4 includes a support plate 41, a connecting rod 42, a pressure rod 43, and a pressure head 44. Two support plates 41 are fixedly installed on the upper end of the washing tank 21. The two support plates 41 are arranged parallel to each other. One end of the connecting rod 42 is hinged between the two support plates 41. The other end of the connecting rod 42 is fixedly connected to one end of the pressure rod 43. The other end of the pressure rod 43 is fixedly equipped with a pressure head 44. The pressure head 44 can approach or move away from the rotating shaft 23, such as... Figure 4 As shown, the anti-rotation assembly 4 includes a U-shaped frame 45, a support rod 46, a connecting piece 47, and a handle 48. The outer side of each support plate 41 is hinged to one side wall of the open end of the U-shaped frame 45. The other end of the U-shaped frame 45 is fixedly installed with a handle 48. The support rod 46 is fixedly installed inside the U-shaped frame 45. The outer periphery of the support rod 46 is rotatably sleeved with one end of two connecting pieces 47. The two connecting pieces 47 are arranged parallel to each other. The other end of each connecting piece 47 is hinged to both sides of the middle part of the connecting rod 42.

[0035] When it is necessary to stop the rotation of the shaft 23 of the cleaning component 2 (such as during loading, unloading, or temporary maintenance), the operator moves the handle 48 of the anti-rotation component 4, causing the U-shaped frame 45 to rotate downwards around the hinge point of the support plate 41. When the U-shaped frame 45 rotates, the internally fixed support rod 46 synchronously pulls the two parallel connecting plates 47. The connecting plates 47 then drive the connecting rod 42 to rotate around the hinge point between the two parallel support plates 41. As the connecting rod 42 rotates, the pressure rod 43, which is fixedly connected to the connecting rod 42, gradually moves closer to the hinge point. Approaching the rotating shaft 23, the pressure head 44 at the end of the pressure rod 43 is pressed tightly against the surface of the rotating shaft 23. The friction between the pressure head 44 and the rotating shaft 23 prevents the rotating shaft 23 from continuing to rotate, thus achieving the anti-rotation function. When it is necessary to release the anti-rotation function and allow the rotating shaft 23 to resume rotation, the handle 48 is turned in the opposite direction, the U-shaped frame 45 rotates in the opposite direction, the support rod 46 pushes the connecting piece 47, and the connecting rod 42 drives the pressure rod 43 and the pressure head 44 away from the rotating shaft 23, releasing the constraint on the rotating shaft 23. At this time, the drive assembly 3 can drive the rotating shaft 23 to rotate normally.

[0036] An anti-rotation component 4 is provided so that when loading or unloading is required, it cannot be guaranteed that the cage door 242 of the material cage 24 will not face outwards. The material cage 24 can be manually rotated to the required angle. After rotating to a specific angle, the anti-rotation component 4 is used to fix the axial position of the material cage 24, which facilitates subsequent loading operations.

[0037] like Figure 5 As shown, a water pipe 11 is installed inside the housing 1. One end of the water pipe 11 is connected to the washing pool 21, and the other end of the water pipe 11 is equipped with a gate valve 12. When sewage needs to be discharged, the gate valve 12 is opened, and the outlet of the water pipe 11 is connected to an external sewage treatment device. The sewage in the washing pool 21 will flow into the external sewage treatment device along the water pipe 11. The entire process is sealed to prevent dirty water from overflowing and polluting the environment, thus maintaining a clean and tidy production environment.

[0038] The lower end of the housing 1 is equipped with feet 13, which can effectively absorb the vibration generated during the operation of the device. The feet 13 can buffer this vibration through their own structure, preventing the vibration from causing the connection of the housing 1 and internal components such as water pipes 11 and drive shafts 35 to become loose, ensuring the transmission stability of each component and extending the overall service life of the device.

[0039] The working process of a plastic granule washing device:

[0040] First, the loading preparation is carried out. The operator first turns the handle 48 of the anti-rotation component 4, which causes the U-shaped frame 45 to rotate downward around the hinge point of the support plate 41. The support rod 46 inside the U-shaped frame 45 pulls the two connecting plates 47, which in turn causes the connecting rod 42 to rotate around the support plate 41, so that the pressure head 44 at the end of the pressure rod 43 presses against the rotating shaft 23 of the cleaning component 2, fixing the rotating shaft 23 and the surrounding material cage 24. Then, the pneumatic door closer 221 supports the upper hinge of the washing tank 21. After connecting the cover plate 22, unfasten the buckle 241 on one side of the material cage 24, open the cage door 242, load the plastic granules to be cleaned into the material cage 24, close the cage door 242 and fasten the buckle 241 after loading, retract the pneumatic door closer 221 and close the cover plate 22, then inject cleaning water into the washing tank 21 until the water level is above the material cage 24, then close the gate valve 12, and then start the cleaning process, release the anti-rotation state of the anti-rotation component 4, and start the drive component 3. Servo motor 32, the output shaft of servo motor 32 drives synchronous pulley 34 to rotate via synchronous belt 33, synchronous pulley 34 drives transmission shaft 35 to rotate, transmission shaft 35 drives rotating shaft 23 to rotate via electromagnetic brake 31, rotating shaft 23 synchronously drives material cage 24 to rotate in water washing tank 21, the mesh of material cage 24 allows cleaning water to fully penetrate, plastic granules continuously tumble during rotation, surface oil and impurities are washed away by cleaning water, after cleaning is completed, entering the unloading stage, servo motor 32 and electromagnetic brake 31 are turned off, gate valve 12 is opened, sewage in water washing tank 21 is discharged through water pipe 11, cover plate 22 is propped up, cage door 242 of material cage 24 is adjusted to face outward, rotating shaft 23 is fixed by anti-rotation component 4, and the buckle 241 of material cage 24 is released, cage door 242 is opened, and cleaned plastic granules are taken out of material cage 24, thus completing a complete plastic granule cleaning operation.

[0041] The control method in this embodiment is controlled by a controller. The controller circuit can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Furthermore, this document is mainly used to protect mechanical devices, and the control method and circuit connection will not be explained in detail here.

[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A washing device for plastic granules, characterized in that: The device includes a housing (1), a cleaning component (2), a drive component (3), and an anti-rotation component (4). The cleaning component (2) is fixedly installed on the top of the housing (1), and the drive component (3) is fixedly installed inside the housing (1). The anti-rotation component (4) is fixedly installed at the top of the cleaning component (2). The drive component (3) is used to drive the cleaning component (2) to rotate. The cleaning component (2) can rotate and clean the plastic particles inside. The anti-rotation component (4) is used to fix the relative position of the inlet of the cleaning component (2) and the housing (1).

2. The plastic granule cleaning device according to claim 1, characterized in that: The cleaning assembly (2) includes a washing tank (21), a rotating shaft (23) and a material holding cage (24). The washing tank (21) is fixedly installed on the upper end of the box (1). A cover plate (22) is hinged to one side of the washing tank (21). The rotating shaft (23) is rotatably installed inside the washing tank (21). The material holding cage (24) is fixedly sleeved around the rotating shaft (23). The material holding cage (24) is used to hold plastic granules.

3. The plastic granule cleaning device according to claim 2, characterized in that: The cover plate (22) is hinged to the upper end of the washing pool (21), and a pneumatic door closer (221) is provided between the cover plate (22) and the washing pool (21).

4. The plastic granule cleaning device according to claim 2, characterized in that: The material cage (24) has a mesh around its perimeter and an opening. One side of the cage door (242) is hinged to the opening, and the other side of the cage door (242) is detachably installed on one side of the material cage (24) via a buckle (241).

5. The plastic granule cleaning device according to claim 2, characterized in that: The drive assembly (3) includes an electromagnetic brake (31), a servo motor (32), a synchronous belt (33), a synchronous pulley (34), and a drive shaft (35). The drive shaft (35) is rotatably disposed between the washing pool (21) and the housing (1). The active side of the electromagnetic brake (31) is fixedly connected to one end of the drive shaft (35), and the passive side of the electromagnetic brake (31) is fixedly connected to one end of the rotating shaft (23). The synchronous pulley (34) is fixedly sleeved on the periphery of the drive shaft (35). The periphery of the synchronous pulley (34) and the periphery of the output shaft of the servo motor (32) are connected by the synchronous belt (33) to form a synchronous transmission structure. The servo motor (32) is fixedly installed inside the housing (1).

6. The plastic granule cleaning device according to claim 2, characterized in that: The anti-rotation assembly (4) includes a support plate (41), a connecting rod (42), a pressure rod (43), and a pressure head (44). Two support plates (41) are fixedly installed on the upper end of the washing pool (21). The two support plates (41) are arranged parallel to each other. One end of the connecting rod (42) is hinged between the two support plates (41). The other end of the connecting rod (42) is fixedly connected to one end of the pressure rod (43). The other end of the pressure rod (43) is fixedly installed with a pressure head (44). The pressure head (44) can be close to or away from the rotating shaft (23).

7. The plastic granule cleaning device according to claim 6, characterized in that: The anti-rotation assembly (4) also includes a U-shaped frame (45), a support rod (46), a connecting piece (47), and a handle (48). The outer side of each support plate (41) is hinged to one side wall of the opening end of the U-shaped frame (45). The other end of the U-shaped frame (45) is fixedly installed with a handle (48). The support rod (46) is fixedly installed inside the U-shaped frame (45). The outer periphery of the support rod (46) is rotatably sleeved with one end of two connecting pieces (47). The two connecting pieces (47) are arranged parallel to each other. The other end of each connecting piece (47) is hinged to both sides of the middle part of the connecting rod (42).

8. The plastic granule cleaning device according to claim 2, characterized in that: A water pipe (11) is installed inside the box (1). One end of the water pipe (11) is connected to the washing pool (21), and the other end of the water pipe (11) is connected to an external sewage treatment device. A gate valve (12) is installed on the water pipe (11).