A plastic granule washing and drying device

Abstract

This utility model discloses a plastic granule washing and drying device, belonging to the technical field of washing and drying devices. The utility model includes a base frame; a washing tank is fixedly connected inside the base frame, a conveying assembly is installed inside the washing tank, and a washing assembly and a drying assembly are installed on the top of the washing tank; the washing tank includes a tank body, a return water tank connected to the bottom of the tank body near the bottom of the inclined surface is fixedly connected to the tank body, and a filter box is fixedly connected inside the base frame; the washing assembly includes a fixing frame and a water pump, and a spray pipe assembly is fixedly connected to the bottom of the fixing frame; the drying assembly includes a drying hood fixedly connected to the top of the tank body, multiple drying pipe assemblies are fixedly connected inside the drying hood, and multiple hot air blowers are installed on the top of the drying hood, with the output end of the hot air blower connected to the input end of the drying pipe assembly. This utility model can wash and dry plastic granules through the washing and drying assemblies, thereby improving the product quality of the plastic granules.

Description

Technical Field

[0001] This utility model belongs to the technical field of cleaning and drying devices, and in particular relates to a cleaning and drying device for plastic particles. Background Technology

[0002] Plastic granules, as the basic form of polymer material processing, are the core intermediate product connecting plastic raw materials and end products. They are essentially regular granular materials made from polymers generated by polymerization reactions through processes such as melting, extrusion, and pelletizing. With advantages such as lightweight, corrosion resistance, easy processing, and controllable cost, plastic granules have deeply penetrated dozens of fields such as packaging, building materials, automobiles, electronics, medical devices, and daily necessities. During the pelleting process, dust impurities may be introduced during the raw material mixing stage. During pelleting and conveying, dust can easily adhere to the surface of the pellets due to factors such as equipment friction and environmental dust. At the same time, plastic pellets have a certain degree of hygroscopicity. Especially when stored or transported in a humid environment, the surface of the pellets easily absorbs moisture from the air. If not treated in time, the pellets will stick together and clump together. Particles mixed with dust are prone to forming surface defects in products during injection molding, extrusion and other processing, such as spots and bubbles, and may even affect the mechanical properties of polymer materials, such as reduced strength and toughness. Furthermore, damp and clump-forming pellets can block the feed channel, resulting in uneven feeding of the processing equipment. This not only reduces production efficiency, but may also cause internal stress concentration in the product due to uneven heating of the pellets, increasing the defect rate.

[0003] To address these issues, we provide a plastic granule washing and drying device. Utility Model Content

[0004] The purpose of this invention is to provide a plastic granule cleaning and drying device. Through the coordinated operation of the cleaning and drying components, combined with the inclined tank, water circulation filtration structure and conveyor belt scraper design, it achieves efficient cleaning and uniform drying of plastic granules, solving the problems of dust mixed in existing plastic granules and easy moisture caking.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model is a plastic granule washing and drying device, including a base frame; a washing tank is fixedly connected inside the base frame, a conveying component for conveying plastic granules is provided inside the washing tank, and a washing component and a drying component are provided on the top of the washing tank. The cleaning tank includes a tank body that is fixedly connected to the inside of the base frame and inclined upwards. A return water tank that is connected to the tank body is fixedly connected to the bottom of the tank body near the bottom end of the slope. A filter box is fixedly connected inside the base frame. The input end of the filter box is connected to the return water tank through a pipe. A discharge trough that is connected to the tank body is installed at the bottom of the tank body near the top end of the slope. The cleaning assembly includes a fixed frame fixedly connected to the top of the tank and a water pump fixedly connected to the inside of the base frame. The input end of the water pump is connected to the output end of the filter box through a pipe. A spray pipe assembly for rinsing plastic particles is fixedly connected to the bottom of the fixed frame. The output end of the water pump is connected to the input end of the spray pipe assembly through a pipe. The drying assembly includes a drying hood fixedly connected to the top of the tank. Multiple drying tubes are fixedly connected inside the drying hood. Multiple hot air blowers are installed on the top of the drying hood, and the output end of the hot air blowers is connected to the input end of the drying tubes.

[0006] The present invention is further configured such that the conveying assembly includes a driven roller and a driving roller rotatably connected inside the tank body, and a motor fixedly connected inside the base frame. A conveyor belt is installed on the outside of the driven roller and the driving roller. A driven sprocket is fixedly connected to one end of the shaft of the driving roller located outside the tank body. A driving sprocket is fixedly connected to the output end of the motor. A transmission chain is installed between the driving sprocket and the driven sprocket.

[0007] The present invention is further configured such that a plurality of water-permeable holes are uniformly opened inside the conveyor belt, and a plurality of scrapers are uniformly fixed on the outside of the conveyor belt.

[0008] The present invention is further configured such that the spray pipe assembly includes a main pipe fixedly connected to the bottom of the fixing frame and a plurality of branch pipes connected to the main pipe, and the main pipe is connected to the output end of the water pump through a pipe, and a plurality of spray nozzles are installed at equal intervals at the bottom of the branch pipes.

[0009] The present invention is further configured such that the drying tube assembly includes a three-way pipe fixedly connected to the top of the inner cavity of the drying hood, and the interface of the three-way pipe located outside the drying hood is connected to the output end of the hot air blower. The other two interfaces of the three-way pipe are equipped with air guide pipes. Multiple downward-curving bends are installed on both sides of the outer side of the air guide pipes, and a duckbill-shaped air outlet is installed at the bottom of the bend.

[0010] The present invention is further provided that an exhaust pipe connected to the drying hood is installed at the top of the drying hood near the top of the inclined surface.

[0011] The present invention is further configured such that a top plate is fixedly connected to the top of the trough near the bottom of the inclined surface, and a feeding hopper is installed inside the top plate.

[0012] This utility model has the following beneficial effects: 1. This utility model, through the upward tilting design of the tank and the connection structure between the return water tank and the filter box, can not only efficiently collect the cleaning wastewater and introduce it into the filter box for purification, but also reuse the purified water for cleaning, thereby improving the water resource utilization rate and avoiding the retention of wastewater in the tank, which would affect the cleaning effect.

[0013] 2. This utility model utilizes the synergistic action of the water pump and spray pipe assembly in the cleaning component. The water pump stably delivers filtered clean water to the spray pipe assembly, causing the nozzles to spray a water flow with sufficient impact force, effectively washing away dust and impurities adhering to the surface of the plastic granules. This reduces the impact of dust on subsequent processing and product quality from the source. Simultaneously, the drying hood, drying pipe assembly, and hot air fan of the drying component work together to provide uniform and stable heat to the plastic granules in a relatively enclosed space, quickly removing moisture from the surface of the granules and preventing caking due to residual moisture. This ensures that the plastic granules remain loose, thereby ensuring that product quality is not affected by dust contamination and caking during subsequent use or processing.

[0014] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a schematic cross-sectional view of the overall structure of this utility model.

[0018] Figure 3 This is a schematic diagram of the structure of the spray pipe assembly of this utility model.

[0019] Figure 4 This is a schematic diagram of the drying tube assembly of this utility model.

[0020] The attached diagram lists the components represented by each number as follows: 100. Base frame; 200. Cleaning tank; 201. Tank body; 202. Return water tank; 203. Top plate; 204. Discharge chute; 205. Exhaust pipe; 300. Conveying assembly; 301. Driven roller; 302. Driven roller; 303. Conveyor belt; 303a. Scraper; 304. Driven sprocket; 305. Motor; 306. Driven sprocket; 307. Drive chain; 400. Cleaning unit Components; 401, Fixing frame; 402, Spray pipe assembly; 402a, Main pipe; 402b, Branch pipe; 402c, Spray nozzle; 403, Water pump; 500, Drying assembly; 501, Drying hood; 502, Drying pipe assembly; 502a, T-connector; 502b, Air duct; 502c, Bend; 502d, Air outlet; 503, Hot air blower; 600, Filter box; 700, Feed hopper. Detailed Implementation

[0021] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1 Please see Figures 1 to 4 The present invention is a plastic particle washing and drying device, including a base frame 100; a washing tank 200 is fixedly connected inside the base frame 100, a conveying component 300 for conveying plastic particles is provided inside the washing tank 200, and a washing component 400 and a drying component 500 are provided on the top of the washing tank 200. The cleaning tank 200 includes an upwardly inclined tank body 201 fixedly connected inside the base frame 100. A return water tank 202, communicating with the tank body 201, is fixedly connected to the bottom of the tank body 201 near the bottom of the inclined surface. A filter box 600 is fixedly connected inside the base frame 100. The input end of the filter box 600 is connected to the return water tank 202 via a pipe. A discharge trough 204, communicating with the tank body 201, is installed at the bottom of the tank body 201 near the top of the inclined surface. The upwardly inclined design of the tank body 201 facilitates the conveying component 300 to gradually move the plastic granules. Moving upwards enables continuous processing; on the other hand, the wastewater generated during cleaning flows towards the bottom of the slope under the action of gravity, efficiently collecting in the return water tank 202, avoiding the wastewater from stagnating in the tank 201. The connection structure between the return water tank 202 and the filter box 600 allows the collected wastewater to be introduced into the filter box 600 for purification. The treated clean water can be reused for cleaning, improving water resource utilization. The discharge trough 204 is located at the top of the slope and can receive the plastic granules that have been cleaned and dried, ensuring smooth discharge channels and adapting to the continuous discharge requirements in batch production scenarios. The cleaning assembly 400 includes a fixed frame 401 fixedly connected to the top of the tank 201 and a water pump 403 fixedly connected to the inside of the base frame 100. The input end of the water pump 403 is connected to the output end of the filter box 600 through a pipe. The bottom of the fixed frame 401 is fixedly connected to a spray pipe assembly 402 for rinsing plastic particles. The output end of the water pump 403 is connected to the input end of the spray pipe assembly 402 through a pipe. The water pump 403 establishes a water circulation channel between the filter box 600 and the spray pipe assembly 402, which can stably deliver filtered clean water to the spray pipe assembly 402 to realize water resource recycling. At the same time, the water pump 403 can provide continuous and stable water pressure to ensure that the water flow sprayed from the spray pipe assembly 402 has sufficient impact force to effectively remove dust, impurities and other substances attached to the surface of the plastic particles and improve the cleaning cleanliness. The drying assembly 500 includes a drying hood 501 fixedly connected to the top of the tank 201. Multiple drying tube assemblies 502 are fixedly connected inside the drying hood 501. Multiple hot air blowers 503 are installed on the top of the drying hood 501, and the output end of the hot air blower 503 is connected to the input end of the drying tube assembly 502. The drying hood 501 can form a relatively closed drying space at the top of the tank 201, reducing the diffusion of hot air generated by the hot air blower 503 to the external environment, improving heat utilization, and reducing energy consumption. The combination design of multiple drying tube assemblies 502 and multiple hot air blowers 503 can increase the hot air output area and total output, ensuring that the plastic particles on the conveying assembly 300 are evenly contacted with the hot air, improving the drying quality. The hot air blower 503 can continuously provide hot air at a stable temperature to the drying tube assembly 502, ensuring that the drying process is continuous and uninterrupted, meeting the high-efficiency drying requirements of batch plastic particles, and improving the overall processing efficiency of the device. The conveying assembly 300 includes a driven roller 301 and a driving roller 302 rotatably connected inside the tank 201, and a motor 305 fixedly connected inside the base frame 100. A conveyor belt 303 is installed on the outside of the driven roller 301 and the driving roller 302. A driven sprocket 304 is fixedly connected to one end of the shaft of the driving roller 302 located outside the tank 201. A driving sprocket 306 is fixedly connected to the output end of the motor 305. A transmission chain 307 is installed between the driving sprocket 306 and the driven sprocket 304. The continuous operation of the conveyor belt 303 can realize the assembly line operation of plastic granule washing and drying process, eliminating the need for frequent manual transfer of granules, improving the automation level and processing efficiency of the device, and adapting to the needs of industrial mass production.

[0023] Specifically, the conveyor belt 303 has multiple permeable holes evenly distributed inside, and multiple scrapers 303a are evenly fixed on the outside of the conveyor belt 303. The permeable holes on the conveyor belt 303 allow the wastewater generated during the cleaning process to quickly drip through the conveyor belt 303 to the bottom of the tank 201, preventing wastewater from remaining on the surface of the conveyor belt 303 and preventing secondary contamination of the plastic particles by the residual wastewater. The scrapers 303a can block and push the plastic particles on the conveyor belt, effectively preventing the particles from sliding down due to gravity during the inclined conveying process of the conveyor belt 303, ensuring that the particles move stably with the conveyor belt 303. At the same time, the scrapers 303a can evenly disperse the accumulated particles, making the particles more evenly distributed on the conveyor belt, providing favorable conditions for the comprehensive rinsing of the subsequent cleaning component 400 and the uniform drying of the drying component 500, further improving the cleaning and drying effect. The spray pipe assembly 402 includes a main pipe 402a fixedly connected to the bottom of the fixed frame 401 and multiple branch pipes 402b connected to the main pipe 402a. The main pipe 402a is connected to the output end of the water pump 403 through a pipe. Multiple nozzles 402c are installed at equal intervals at the bottom of the branch pipes 402b. The main pipe 402a can evenly distribute the clean water delivered by the water pump 403 to each branch pipe 402b, ensuring that the water pressure and water volume of each branch pipe 402b are consistent. The multiple branch pipes 402b, together with the nozzles 402c installed at equal intervals at the bottom, can greatly expand the spray coverage area, ensuring that plastic particles at different positions on the conveyor belt 303 can be washed by the water flow, eliminating cleaning dead corners. The drying pipe assembly 502 includes a three-way pipe 502a fixedly connected to the top of the inner cavity of the drying hood 501. The interface of the three-way pipe 502a located outside the drying hood 501 is connected to the output end of the hot air blower 503. The other two interfaces of the three-way pipe 502a are each equipped with a guide pipe 502b. Multiple downward-curving bends 502c are installed on both sides of the outer side of the guide pipe 502b. A duckbill-shaped air outlet 502d is installed at the bottom of the bend 502c. The multiple bends 502c installed on both sides of the guide pipe 502b can expand the hot air delivery. The design of the curved pipe 502c, which bends downwards, combined with the duckbill-shaped air outlet 502d, allows the hot air to cover the entire area of ​​the conveyor belt 303 in the width direction, avoiding uneven drying of the granules due to incomplete hot air coverage. This design precisely guides the hot air to the surface of the plastic granules on the conveyor belt 303, reducing the loss of hot air due to upward diffusion and improving heat utilization efficiency. At the same time, the duckbill-shaped air outlet 502d allows the hot air to be sprayed out in a gentle and uniform manner, avoiding excessive local heat that could cause the granules to deform or over-dry, thus ensuring the drying quality of the plastic granules.

[0024] Furthermore, an exhaust pipe 205 connected to the drying hood 501 is installed at the top of the sloping surface. The exhaust pipe 205 can promptly discharge the water vapor and hot exhaust gas generated in the drying hood 501 during the drying process, preventing water vapor from accumulating in the drying hood 501 and causing the internal humidity to rise, thereby preventing the humidity from affecting the drying efficiency and drying quality. A top plate 203 is fixedly connected to the top of the trough 201 near the bottom of the inclined surface. A feeding hopper 700 is installed inside the top plate 203. The feeding hopper 700 can realize the centralized feeding of plastic granules, ensuring that the granules can fall evenly at the initial end of the conveyor belt 303.

[0025] The operation process of this embodiment is as follows: When it is necessary to clean and dry plastic granules, the plastic granules are first fed into the hopper 700. The granules fall into the initial end of the conveyor belt 303 in the tank 201 through the top plate 203. The scraper 303a will prevent the granules from sliding down and disperse them evenly. Then, the motor 305 is started. The motor 305 drives the drive sprocket 306 to rotate. Through the transmission chain 307, the driven sprocket 304 and the drive roller 302 are driven to rotate. The drive roller 302, together with the driven roller 301, drives the conveyor belt 303. The particles are conveyed upwards along the inclined direction of the tank 201. Simultaneously, the water pump 403 is activated, drawing purified water from the filter box 600 and transporting it through a pipeline to the main pipe 402a of the spray pipe assembly 402. The main pipe 402a distributes the purified water to each branch pipe 402b, and finally sprays it onto the plastic particles on the conveyor belt through the nozzles 402c at the bottom of the branch pipes 402b, washing away dust and impurities from the particle surface. The wastewater generated during washing drips through the water-permeable holes of the conveyor belt 303 to the bottom of the tank 201. The water flows towards the bottom of the slope due to gravity, eventually converging in the return water tank 202. It then flows through a pipe into the filter box 600 for purification. The purified water can be reused by the water pump 403 to achieve water circulation. When the plastic particles enter the drying hood 501 covered area along the conveyor belt 303, the hot air fan 503 is activated. The hot air generated by the hot air fan 503 is delivered to the three-way pipe 502a of the drying tube assembly 502, and then distributed to the two side air guide pipes 502b via the three-way pipe 502a. Finally, the air passes through the bends 50 outside the air guide pipes 502b. 2c, The plastic granules are evenly sprayed by the duckbill-shaped air outlet 502d to dry them. The water vapor and hot exhaust gas generated during the drying process are discharged through the exhaust pipe 205 at the top of the drying hood 501 to avoid the humidity inside the drying hood 501 from rising and affecting the drying effect. The dried plastic granules continue to move with the conveyor belt 303 to the top of the inclined surface of the tank 201 and finally fall into the discharge chute 204 at the bottom of the tank 201. The discharge is completed through the discharge chute 204. The entire cleaning and drying process is carried out continuously to meet the needs of mass production.

[0026] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0027] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it.

Claims

1. A plastic granule washing and drying device, comprising a base frame (100); characterized in that: The base frame (100) is fixedly connected to a cleaning tank (200), and the cleaning tank (200) is provided with a conveying assembly (300) for conveying plastic particles. The top of the cleaning tank (200) is provided with a cleaning assembly (400) and a drying assembly (500). The cleaning tank (200) includes a tank body (201) that is fixedly connected to the inside of the base frame (100) and tilted upwards. A return water tank (202) that communicates with the tank body (201) is fixedly connected to the bottom of the tank body (201) near the bottom end of the slope. A filter box (600) is fixedly connected to the inside of the base frame (100). The input end of the filter box (600) is connected to the return water tank (202) through a pipe. A discharge trough (204) that communicates with the tank body (201) is installed at the bottom of the tank body (201) near the top end of the slope. The cleaning assembly (400) includes a fixed frame (401) fixedly connected to the top of the tank (201) and a water pump (403) fixedly connected to the inside of the base frame (100). The input end of the water pump (403) is connected to the output end of the filter box (600) through a pipe. A spray pipe assembly (402) for rinsing plastic particles is fixedly connected to the bottom of the fixed frame (401). The output end of the water pump (403) is connected to the input end of the spray pipe assembly (402) through a pipe. The drying assembly (500) includes a drying hood (501) fixedly connected to the top of the tank (201). Multiple drying tube groups (502) are fixedly connected inside the drying hood (501). Multiple hot air blowers (503) are installed on the top of the drying hood (501), and the output end of the hot air blower (503) is connected to the input end of the drying tube group (502).

2. The plastic granule washing and drying device according to claim 1, characterized in that, The conveying assembly (300) includes a driven roller (301) and a driving roller (302) rotatably connected inside the trough (201), and a motor (305) fixedly connected inside the base frame (100). A conveyor belt (303) is installed on the outside of the driven roller (301) and the driving roller (302). A driven sprocket (304) is fixedly connected to one end of the shaft of the driving roller (302) located outside the trough (201). A driving sprocket (306) is fixedly connected to the output end of the motor (305). A transmission chain (307) is installed between the driving sprocket (306) and the driven sprocket (304).

3. The plastic granule washing and drying device according to claim 2, characterized in that, The conveyor belt (303) has a plurality of water-permeable holes evenly distributed inside, and a plurality of scrapers (303a) are evenly fixed on the outside of the conveyor belt (303).

4. The plastic granule washing and drying device according to claim 1, characterized in that, The spray pipe assembly (402) includes a main pipe (402a) fixedly connected to the bottom of the fixing frame (401) and a plurality of branch pipes (402b) connected to the main pipe (402a). The main pipe (402a) is connected to the output end of the water pump (403) through a pipe. A plurality of nozzles (402c) are installed at equal intervals at the bottom of the branch pipes (402b).

5. The plastic granule washing and drying device according to claim 1, characterized in that, The drying tube assembly (502) includes a three-way pipe (502a) fixedly connected to the top of the inner cavity of the drying hood (501), and the interface of the three-way pipe (502a) located outside the drying hood (501) is connected to the output end of the hot air blower (503). The other two interfaces of the three-way pipe (502a) are equipped with air guide pipes (502b). Multiple downward-curving bends (502c) are installed on both sides of the outer side of the air guide pipe (502b). A duckbill-shaped air outlet (502d) is installed at the bottom of the bend (502c).

6. The plastic granule washing and drying device according to claim 1, characterized in that, An exhaust pipe (205) connected to the drying hood (501) is installed at the top of the sloping top.

7. The plastic granule washing and drying device according to claim 1, characterized in that, A top plate (203) is fixedly connected to the top of the trough (201) near the bottom of the inclined surface, and a feeding hopper (700) is installed inside the top plate (203).

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