Crawler-type granulation device with cleaning and drying functions
Through the combined cleaning and drying technology of brush cleaning shaft and hot air circulation, the problem of plastic and water stain pollution in the crawler granulation device is solved, efficient cleaning and rapid drying are achieved, and the quality of plastic particles is stable.
Patent Information
- Application Number
- CN202510741935.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-05
- Publication Date
- 2025-07-15
AI Technical Summary
After long-term contact with water, the track-type granulation device is prone to residual plastic and water stains, resulting in pollution and affecting the stability of the quality of plastic particles.
The front track is friction-cleaned with a brush cleaning shaft, and the intermediate rotation shaft is combined with the meshing of the inter-gear gear to drive the brush shaft to rotate in the same direction, enhancing the cleaning effect; the cooling water tank is isolated by the middle partition plate and the one-way seal plate to prevent the return of sewage; the porous hot air shaft is circulated and dried to improve the drying efficiency.
Effectively remove plastic residues on the tracks, ensure stable quality of plastic particles, shorten the drying time to 1/4 of the traditional one, improve cleaning efficiency by 80%, and reduce energy consumption by 30%.
Smart Images
Figure CN120307500A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of granulation equipment, in particular to a crawler-type granulation device with cleaning and drying functions. Background Art
[0002] The granulating device is a device that processes uniform granular products through a specific process. The granules have good fluidity and can be evenly fed into the hopper of the processing equipment to avoid unstable processing caused by agglomeration, bridging or poor fluidity of powder or block raw materials.
[0003] The granulation device first heats and melts the plastic raw materials into strips through an extruder, and then cools them in water before cutting them into pellets. The crawler type uses crawlers to transport the plastic strips. The crawlers transport the plastic strips in the water to the outside of the water surface. Due to the long-term contact between the crawlers and the plastic strips, there will be plastic residue on the outside of the crawlers. The long-term contact between the crawlers and water will also cause water stains on the outside. The residual plastic and residual water stains will pollute the plastic in production, which is not conducive to the stability of the quality of the plastic pellets. Summary of the invention
[0004] The present invention provides a crawler-type granulating device with cleaning and drying functions. The brush cleaning shaft cleans the friction contact of the front crawler to ensure the cleanliness of the contact surface between the front crawler and the plastic, avoids the situation where water stains on the front crawler contaminate the plastic, and ensures the stability of the quality of the plastic particles. The rotating shaft drives the brush cleaning shaft to rotate in the same direction through the meshing of the intermediate gears, and the upper part of the brush cleaning shaft and the front crawler move in the opposite direction. The friction between the brush cleaning shaft and the front crawler is greatly increased, which greatly improves the cleaning effect of the brush cleaning shaft on the front crawler.
[0005] The invention provides a crawler-type granulating device with cleaning and drying functions, which specifically comprises a screw extrusion module, a cooling water tank and a cooling conveying frame, a drying conveying frame and a pelletizing module. The rear part of the screw extrusion module is provided with a cooling water tank, the inner side of the cooling water tank is provided with a cooling conveying frame, the rear part of the cooling water tank is provided with a drying conveying frame, the rear part of the drying conveying frame is provided with a pelletizing module, the pelletizing module adopts water-cooled die surface pelletizing, the blade speed is 200-800r / min, the particle size is adjustable from 2 to 5mm, the top heat dissipation hole of the screw extrusion module is covered with an upper air collecting hood, the upper air collecting hood is connected and fixed to the head end of the air delivery pipe, the screw extrusion module adopts a twin screw with a diameter of 40mm, the aspect ratio is 32:1, and the temperature of the heating section is controlled to be 180-230℃.
[0006] Furthermore, a middle partition is fixedly arranged inside the rear side of the cooling water tank. The cooling water tank has a volume of 200 L and is equipped with a temperature control system to maintain the water temperature at 20 - 30 °C. A middle communication opening is provided at the lower part of the middle partition. A one-way sealing plate is hinged and rotatably connected to the lower part of the middle partition. An outer sliding frame is slidably connected to the outer side of the rear part of the cooling water tank in an opposing manner. The middle part of the outer sliding frame is threadedly connected to a threaded rod, which can be manually controlled or driven by a 0.75 kW servo motor. The upper part of the outer sliding frame is rotatably connected to a lower support.
[0007] Furthermore, the upper end of the lower support is rotatably connected to the bottom of the upper support. The one-way sealing plate covers one side of the middle communication opening. The middle communication opening is in one-way communication towards the side of the one-way sealing plate. A silicone rubber sealing ring is embedded at the edge of the one-way sealing plate, and the sealing pressure is ≥5 kPa. The middle partition divides the cooling water tank into front and rear chambers, and the middle communication opening only allows water to flow unidirectionally from front to back.
[0008] Furthermore, a middle rotating shaft is rotatably connected to the middle part of the cooling conveyor frame. The middle rotating shaft is meshed and tightened inside the front track. The front track is made of food-grade stainless steel, and the transmission speed is adjustable from 0.5 to 3 m / min. An intermediate gear is rotatably connected to the outer side of the middle part of the cooling conveyor frame. A brush cleaning shaft is rotatably connected to the middle part of the cooling conveyor frame. The brush cleaning shaft uses PA66 nylon bristles with a Shore hardness of 50D, and the contact pressure between the bristles and the front track is 0.1 - 0.3 N / cm².
[0009] Furthermore, the upper part of the intermediate gear is meshed and connected to the end gear of the middle rotating shaft, and the lower part of the intermediate gear is meshed and connected to the end gear of the brush cleaning shaft. The outer bristles of the brush cleaning shaft are in frictional contact with the lower part of the front track. The end gear of the middle rotating shaft drives the end gear of the brush cleaning shaft through the intermediate gear with a transmission ratio of 1:1 to ensure that the front track and the brush move synchronously in opposite directions.
[0010] Furthermore, the middle partition is located below the middle parts of the cooling conveyor frame and the front track. The front end of the cooling conveyor frame is rotatably connected to the inner bottom of the cooling water tank. The front end of the cooling conveyor frame and the brush cleaning shaft are respectively on both sides of the middle partition. The rear end of the cooling conveyor frame is slidably connected to the upper support.
[0011] Furthermore, rear rotating shafts are rotatably connected to the middle and rear parts of the drying conveyor frame. The rear rotating shafts are meshed and tightened on both sides of the rear track. A lower air box is fixedly connected to the lower part of the drying conveyor frame, and an upper air box is fixedly connected to the upper part of the drying conveyor frame. A porous hot air shaft is rotatably connected to the front part of the drying conveyor frame. Ventilation holes with a diameter of 5 mm are provided on the surface of the porous hot air shaft, and the porosity is 30%. The drying conveyor frame utilizes the waste heat of the screw extrusion module for hot air circulation.
[0012] Furthermore, both the lower air box and the upper air box have a structure with air outlet at the top and air inlet at the bottom. The upper air box is located above the rear track, and the lower air box is located below the rear track. The air inlet of the lower air box is connected to the air delivery pipe, and the air outlet of the lower air box is connected to the porous hot air shaft pipe. The porous hot air shaft is located between the front track and the rear track. The upper air hood collects the hot air emitted by the screw extrusion module and sends it into the lower air box through the air delivery pipe. The hot air blows upward to purge the moisture on the plastic surface through the porous hot air shaft and the lower air box below the rear track, and the hot air blows through the through holes of the porous hot air shaft towards the front track.
[0013] The present invention provides a crawler granulation device with cleaning and drying functions, which has the following beneficial effects: The front track and the rear track convey the plastic melted into strips, eliminating the need for manual guidance of the plastic strip along the rotating shaft. The brush cleaning shaft cleans the front track by friction contact, ensuring the cleanliness of the contact surface between the front track and the plastic, avoiding the situation of water stains on the front track polluting the plastic, and ensuring the stable quality of plastic particles.
[0014] The middle rotating shaft drives the brush cleaning shaft to rotate in the same direction through the meshing of intermediate gears. The upper part of the brush cleaning shaft moves in the opposite direction to the front track, greatly increasing the friction between the brush cleaning shaft and the front track, and further improving the cleaning effect of the brush cleaning shaft on the front track.
[0015] The middle partition divides the cooling water tank into a cooling chamber and a cleaning chamber, and realizes the double chamber isolation through the gravity - water pressure balance mechanism of the one - way sealing plate. When the water in the cooling chamber flows through the middle connecting opening to supplement the water volume in the cleaning chamber, the one - way sealing plate is automatically opened by the water pressure, and the sewage containing impurities in the cleaning chamber cannot flow back to the cooling chamber, avoiding the pollution of the plastic strip during cooling.
[0016] While the porous hot air shaft contacts and supports the plastic strip, the hot air blown out from the through holes of the porous hot air shaft blows on the surface of the plastic strip, accelerating the drying of the plastic strip. The lower air box is connected to the air delivery pipe to increase the intake air temperature, improve the exhaust temperature of the lower air box and the porous hot air shaft, quickly reduce the moisture content on the surface of the plastic strip from 5% after cooling to below 0.3%, further improving the drying speed, and shortening the drying time to 1 / 4 of the traditional natural cooling. Brief Description of the Drawings
[0017] In order to more clearly illustrate the technical solutions of the present invention, the drawings of the present invention will be briefly introduced below.
[0018] The drawings in the following description only relate to some embodiments of the present invention and do not limit the present invention.
[0019] In the drawings: Figure 1 A schematic diagram showing the overall structure of the present application is shown; Figure 2Shows a schematic diagram of the cooling water tank structure of the present application; Figure 3 Shows a schematic structural diagram of the cross-section of the cooling water tank of the present application; Figure 4 Shows a schematic structural diagram of the drying conveyor rack of the present application; Figure 5 Shows a schematic structural diagram of the cooling conveyor rack of the present application; Figure 6 Shows a schematic structural diagram of the upper bracket of the present application; Figure 7 Shows a schematic structural diagram of the middle partition of the present application; Figure 8 Shows a schematic structural diagram of the separated state of the screw extrusion module, cooling water tank, cooling conveyor rack, drying conveyor rack and pelletizing module of the present application.
[0020] Reference numerals: 1, screw extrusion module; 101, upper gas collecting hood; 102, gas transmission pipe; 2, cooling water tank; 201, middle partition; 202, middle communication opening; 203, one-way sealing plate; 204, outer sliding frame; 205, threaded rod; 206, lower bracket; 207, upper bracket; 3, cooling conveyor rack; 301, middle rotating shaft; 302, front crawler belt; 303, intermediate gear; 304, brush cleaning shaft; 4, drying conveyor rack; 401, rear rotating shaft; 402, rear crawler belt; 403, lower air box; 404, upper air box; 405, porous hot air shaft; 5, pelletizing module. Detailed implementation manners
[0021] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.
[0022] Embodiment 1: Please refer to Figures 1 to 8 : The present invention provides a crawler granulating device with cleaning and drying functions, including a screw extrusion module 1, a cooling water tank 2, a cooling conveyor frame 3, a drying conveyor frame 4, and a pelletizing module 5. An upper air hood 101 is covered outside the top heat dissipation holes of the screw extrusion module 1, and the upper air hood 101 is fixedly connected to the head end of the air delivery pipe 102. The screw extrusion module 1 uses a twin-screw with a diameter of 40 mm and a length-diameter ratio of 32:1. The temperature of the heating section is controlled at 180 - 230 °C to match the melting processing requirements of PLA. A cooling water tank 2 is arranged at the rear of the screw extrusion module 1. A middle partition 201 is fixedly arranged inside the rear side of the cooling water tank 2. The volume of the cooling water tank 2 is 200 L, and a temperature control system is built-in to maintain the water temperature at 20 - 30 °C. A middle communication opening 202 is opened at the lower part of the middle partition 201. A one-way sealing plate 203 is rotatably connected to the lower part of the middle partition 201 by a hinge. An outer sliding frame 204 is slidably connected to the outside of the rear part of the cooling water tank 2 in an opposing manner. The middle part of the outer sliding frame 204 is threadedly connected to a threaded rod 205. The threaded rod 205 can be manually controlled or driven by a 0.75 kW servo motor. The upper part of the outer sliding frame 204 is rotatably connected to a lower support 206. A cooling conveyor frame 3 is arranged inside the cooling water tank 2. A middle rotating shaft 301 is rotatably connected to the middle of the cooling conveyor frame 3. The middle rotating shaft 301 is meshed and tightened inside the front crawler 302. The front crawler 302 is made of food-grade stainless steel, and the transmission speed is adjustable from 0.5 to 3 m / min. An intermediate gear 303 is rotatably connected to the outside of the middle of the cooling conveyor frame 3. A brush cleaning shaft 304 is rotatably connected to the middle of the cooling conveyor frame 3. The brush cleaning shaft 304 uses PA66 nylon bristles with a Shore hardness of 50D. The contact pressure between the bristles and the front crawler 302 is 0.1 - 0.3 N / cm². The middle partition 201 is located below the middle of the cooling conveyor frame 3 and the front crawler 302; The head end of the cooling conveyor frame 3 is rotatably connected to the inner bottom of the cooling water tank 2. The head end of the cooling conveyor frame 3 and the brush cleaning shaft 304 are respectively located on both sides of the middle partition 201. The tail end of the cooling conveyor frame 3 is slidably connected to the upper chute of the upper support 207. The lifting of the upper support 207 supports the cooling conveyor frame 3 to adjust the inclination angle. A drying conveyor frame 4 is arranged at the rear of the cooling water tank 2. Rear rotating shafts 401 are rotatably connected to the middle and rear parts of the drying conveyor frame 4. The rear rotating shafts 401 are meshed and tightened on both sides of the rear crawler 402. A lower air box 403 is fixedly connected to the lower part of the drying conveyor frame 4. An upper air box 404 is fixedly connected above the drying conveyor frame 4. A porous hot air shaft 405 is rotatably connected to the front part of the drying conveyor frame 4. Ventilation holes with a diameter of 5 mm are opened on the surface of the porous hot air shaft 405, and the opening rate is 30%. The drying conveyor frame 4 uses the waste heat of the screw extrusion module 1 for hot air circulation, with lower energy consumption compared to independent heating and drying. A pelletizing module 5 is arranged at the rear of the drying conveyor frame 4. The pelletizing module 5 uses water-cooled die face pelletizing, and the blade speed is 200 - 800 r / min. The particle size is adjustable from 2 to 5 mm.
[0023] In the embodiment of the present disclosure, the upper end of the lower bracket 206 is rotatably connected to the bottom of the upper bracket 207. The one-way sealing plate 203 covers one side of the middle communication opening 202. The middle communication opening 202 communicates unidirectionally toward the one-way sealing plate 203. The edge of the one-way sealing plate 203 is embedded with a silicone rubber sealing ring, and the sealing pressure is ≥ 5 kPa. The middle partition plate 201 divides the cooling water tank 2 into front and rear chambers. The middle communication opening 202 only allows water to flow unidirectionally from front to back. The one-way sealing plate 203 is automatically opened by the water flow pressure and closed by gravity and the action of the sealing ring in the reverse direction to prevent the water in the rear chamber from flowing back.
[0024] In the embodiment of the present disclosure, the upper part of the intermediate gear 303 is meshed with the end gear of the middle rotating shaft 301, the lower part of the intermediate gear 303 is meshed with the end gear of the brush cleaning shaft 304, the outer bristles of the brush cleaning shaft 304 are in frictional contact with the lower part of the front crawler 302. The end gear of the middle rotating shaft 301 drives the end gear of the brush cleaning shaft 304 through the intermediate gear 303 with a transmission ratio of 1:1, ensuring that the front crawler 302 and the brush move synchronously in the opposite direction. The brush cleaning shaft 304 of the cooling conveyor frame 3 can online remove the material residues adhered to the surface of the crawler, and the cleaning efficiency is increased by 80% compared with the traditional manual wiping.
[0025] In the embodiment of the present disclosure, both the lower air box 403 and the upper air box 404 are structured with a blower inside and air outlet from the top and air inlet from the bottom. The upper air box 404 is located above the rear crawler 402, and the lower air box 403 is located below the rear crawler 402. The air inlet of the lower air box 403 is communicated with the air delivery pipe 102, and the air outlet of the lower air box 403 is communicated with the porous hot air shaft 405 through a pipeline. The porous hot air shaft 405 is located between the front crawler 302 and the rear crawler 402. The upper air collecting cover 101 collects the hot air emitted by the screw extrusion module 1 and sends it into the lower air box 403 through the air delivery pipe 102. The hot air blows the moisture on the plastic surface upward through the porous hot air shaft 405 and the lower air box 403 below the rear crawler 402, and the hot air blows through the through holes of the porous hot air shaft 405 to the front crawler 302 to realize the pre-drying of the front crawler 302.
[0026] In the second embodiment, on the basis of the first embodiment, the porous hot air shaft 405 and the rear rotating shaft 401 are connected by a belt to keep synchronous rotation. The rotation of the porous hot air shaft 405 assists in the conveying work of the plastic strip, avoiding the situation of passive rotation of the porous hot air shaft 405 and large friction with the plastic strip.
[0027] Working principle of the present invention: The screw extrusion module 1 melts the raw materials and extrudes them into long strips. The melted plastic enters the water in the cooling water tank 2 for cooling and hardening. Then the plastic strips are directly placed and move upward along the inclined front track 302. Then the plastic strips move to the rear track 402 through the porous hot air shaft 405. The front track 302 and the rear track 402 adopt a porous chain-type track structure. The tops of the front track 302 and the rear track 402 convey the plastic melted into strips. The front track 302 and the rear track 402 are evenly distributed with through holes having a diameter of 8-12 mm and an opening rate of 25%-30%, replacing the manual feeding operation in the initial stage of the traditional process, eliminating the situation where personnel manually guide the plastic strips to move along the rotating shaft, and avoiding the safety risk of manual contact with high-temperature materials. The rear track 402 conveys the plastic strips to the granulation module 5 for granulation work; The front track 302 is of an annular structure. The upper part of the front track 302 conveys the plastic strips and then returns to the lower part. The brush cleaning shaft 304 is in frictional contact with the lower part of the front track 302 for cleaning work, ensuring the cleanliness of the contact surface between the front track 302 and the plastic, and avoiding the situation where the front track 302 produces water stains and pollutes the plastic. The middle rotating shaft 301 drives the brush cleaning shaft 304 to rotate in the same direction through the intermediate gear 303. The upper part of the brush cleaning shaft 304 moves in the opposite direction to the front track 302. The friction between the brush cleaning shaft 304 and the front track 302 is greatly increased, further improving the cleaning effect of the brush cleaning shaft 304 on the front track 302. The brush cleaning shaft 304 and the front track 302 form a reverse differential friction structure. The middle rotating shaft 301 drives the brush cleaning shaft 304 to rotate in the opposite direction at a linear speed 1.2 times that of the front track 302 through the intermediate gear 303, generating a relative sliding speed of 2-5 m / s, combined with a contact pressure of 0.1-0.3 MPa, so that the cleaning force of the brush on the track surface is increased to 3 times that of the traditional forward cleaning. The brush is made of nylon fiber with gradually changing hardness, with a hardness of Shore 60D at the root and 40D at the tip, which can not only effectively scrape off the adhered plastic residues, such as PLA melt residues, but also avoid damaging the track surface. After detection, the residual amount of residues on the surface of the rear track 402 after cleaning is ≤0.05 g / m², ensuring the stable quality of plastic particles; The middle partition 201 divides the cooling water tank 2 into a front cooling chamber and a rear cleaning chamber. The cooling water tank 2 cools the plastic in the front part of the middle partition 201. The cooling water tank 2 conducts the work of the brush cleaning shaft 304 dipping in water to clean the front track 302 in the rear part of the middle partition 201. The double-chamber isolation is realized through the gravity-hydrostatic pressure balance mechanism of the one-way sealing plate 203. When the water in the cooling chamber flows through the middle connecting opening 202 to supplement the water volume in the cleaning chamber, the one-way sealing plate 203 is automatically opened by the water pressure, and the opening pressure ≥0.01 MPa; the sewage containing impurities in the cleaning chamber cannot flow back to the cooling chamber due to the one-way sealing of the one-way sealing plate 203, and is discharged regularly in cooperation with the sewage discharge valve at the bottom of the cleaning chamber, so that the turbidity of the water quality in the cooling chamber is ≤5 NTU, avoiding the situation where the plastic strips are polluted when cooled by water; The humid and hot air emitted by the screw extrusion module 1 is collected by the upper air collecting hood 101 and then sent into the lower air box 403 through the air conveying pipe 102. After being reheated to 90 - 110°C by the heating element, the energy consumption is only 30% of that of traditional electric heating. Then, it blows on the surface of the plastic strip through the through holes of the porous hot air shaft 405 at a through hole wind speed of 10 - 15 m / s. While the porous hot air shaft 405 makes contact support with the plastic strip, the air blown out from the through holes of the porous hot air shaft 405 blows on the surface of the plastic strip, accelerating the drying work of the plastic strip. At the same time, the surface temperature of the hot air shaft is controlled at 40 - 60°C to avoid the degradation of heat-sensitive materials such as PLA caused by overheating. The lower air box 403 is connected to the air conveying pipe 102 to increase the inlet air temperature, and the exhaust air temperature of the lower air box 403 and the porous hot air shaft 405 is increased. The convective heat transfer coefficient when the hot air contacts the plastic strip reaches 50 - 80 W / (m²・K), enabling the moisture content on the surface of the plastic strip to rapidly drop from 5% after cooling to below 0.3%, further enhancing the drying speed. The drying time is shortened to 1 / 4 of that of traditional natural cooling. The threaded rod 205 rotates to guide the outer sliding frames 204 at both ends to move towards each other. The opposite movement of the outer sliding frames 204 supports the upper bracket 207 through the lower bracket 206 for vertical movement, and the upper bracket 207 supports the cooling conveyor 3 to lift and adjust the inclination angle of the cooling conveyor 3.
[0028] In this article, the following points need to be noted: 1. The attached drawings of the embodiments of the present disclosure only relate to the structures involved in the embodiments of the present disclosure. Other structures can refer to the general design.
[0029] 2. Without conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.
[0030] The above is only the specific implementation manner of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present disclosure can easily think of changes or substitutions, which should all be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.
Claims
1. A crawler granulation device with cleaning and drying functions, comprising: Screw extrusion module (1), cooling water tank (2), cooling conveyor rack (3), drying conveyor rack (4) and pelletizing module (5); characterized in that a cooling water tank (2) is arranged at the rear of the screw extrusion module (1), a cooling conveyor rack (3) is arranged inside the cooling water tank (2), a drying conveyor rack (4) is arranged at the rear of the cooling water tank (2), a pelletizing module (5) is arranged at the rear of the drying conveyor rack (4), a middle rotating shaft (301) is rotatably connected to the middle of the cooling conveyor rack (3), the middle rotating shaft (301) is meshed and tightened inside the front crawler belt (302), an intermediate gear (303) is rotatably connected to the outer side of the middle of the cooling conveyor rack (3), and a brush cleaning shaft (304) is rotatably connected to the middle of the cooling conveyor rack (3).
2. The track granulation device with cleaning and drying functions according to claim 1, characterized in that, An upper air collecting hood (101) covers the outside of the top heat dissipation holes of the screw extrusion module (1), and the upper air collecting hood (101) is fixedly connected to the head end of the air conveying pipe (102).
3. The track granulation device with cleaning and drying functions according to claim 2, characterized in that, A middle partition plate (201) is arranged inside the rear side of the cooling water tank (2), a middle communication opening (202) is opened at the lower part of the middle partition plate (201), a one-way sealing plate (203) is rotatably connected to the lower part of the middle partition plate (201) by a hinge, an outer sliding frame (204) is slidably connected to the outside of the rear part of the cooling water tank (2) in an opposing manner, the middle of the outer sliding frame (204) is threadedly connected to a threaded rod (205), and an upper support (207) is rotatably connected to the upper part of the outer sliding frame (204).
4. A crawler granulation device with cleaning and drying functions according to claim 3, characterized in that, The upper end of the lower support (206) is rotatably connected to the bottom of the upper support (207), the one-way sealing plate (203) covers one side of the middle communication opening (202), and the middle communication opening (202) is unidirectionally communicated towards the one-way sealing plate (203).
5. The crawler granulation device with cleaning and drying functions according to claim 4, characterized in that, The upper part of the intermediate gear (303) is meshed with the tail end gear of the middle rotating shaft (301), the lower part of the intermediate gear (303) is meshed with the tail end gear of the brush cleaning shaft (304), and the bristles outside the brush cleaning shaft (304) are in frictional contact with the lower part of the front crawler belt (302).
6. A crawler granulation device with cleaning and drying functions according to claim 5, characterized in that, The middle partition plate (201) is located below the middle of the cooling conveyor rack (3) and the front crawler belt (302), the head end of the cooling conveyor rack (3) is rotatably connected to the inner bottom of the cooling water tank (2), the head end of the cooling conveyor rack (3) and the brush cleaning shaft (304) are respectively located on both sides of the middle partition plate (201), and the tail end of the cooling conveyor rack (3) is slidably connected to the upper support (207).
7. A crawler granulation device with cleaning and drying functions according to claim 1, characterized in that, The middle and rear parts of the drying conveyor rack (4) are rotatably connected with a rear rotating shaft (401), the rear rotating shaft (401) is meshed and tightened on both sides of the rear crawler belt (402), a lower air box (403) is fixedly connected to the lower part of the drying conveyor rack (4), an upper air box (404) is fixedly connected to the upper part of the drying conveyor rack (4), and a porous hot air shaft (405) is rotatably connected to the front part of the drying conveyor rack (4).
8. A crawler granulation device with cleaning and drying functions according to claim 7, characterized in that, Both the lower air box (403) and the upper air box (404) have a structure with air outlet at the top and air inlet at the bottom. The upper air box (404) is located above the rear crawler belt (402), and the lower air box (403) is located below the rear crawler belt (402). The air inlet of the lower air box (403) is communicated with the air delivery pipe (102), and the air outlet of the lower air box (403) is communicated with the porous hot air shaft (405) through a pipeline. The porous hot air shaft (405) is located between the front crawler belt (302) and the rear crawler belt (402).