Regenerated plastic particle cooling device

Abstract

The utility model discloses a cooling device for reprocessed plastic particles, which belongs to the technical field of plastic processing equipment and comprises a cooling barrel for cooling the reprocessed plastic particles, a pre-cooling barrel for storing the reprocessed plastic particles is mounted in the cooling barrel, a rotating shaft is arranged in the pre-cooling barrel, and the rotating shaft is connected with the cooling barrel. Two guide conical blocks are welded to the periphery of the rotating shaft, a plurality of rotating grooves are formed in the bottoms of the two guide conical blocks, springs are connected to the interiors of the rotating grooves, spoilers used for disturbing the airflow direction are connected to one ends of the springs, and the ends of the spoilers are rotationally arranged in the rotating grooves; according to the plastic particle cooling device, the turbulent flow capacity is improved, the plastic particles make full contact with cooling gas, the heat exchange degrees of different portions of the surfaces of the particles and the cooling gas are the same, and cooling is more uniform.

Description

Technical Field

[0001] This utility model belongs to the technical field of plastic processing equipment, and in particular to a cooling device for recycled plastic granules. Background Technology

[0002] In the production of recycled plastic pellets, the cooling process is a crucial step. After extrusion granulation, the plastic pellets are at a high temperature and need to be cooled rapidly to set their shape, ensuring the quality and performance of the pellets. Traditional recycled plastic pellet cooling devices can meet basic cooling requirements, but their turbulence capacity is weak, preventing the plastic pellets from fully contacting the cooling gas. This results in uneven heat exchange between different parts of the pellet surface and the cooling gas, leading to uneven cooling.

[0003] A search revealed Chinese patent documents (authorization announcement number CN217648749U). This application relates to the field of plastic processing, and in particular to a cooling device for recycled plastic pellets, comprising a conveying pipe and a lifting and filtering mechanism. The conveying pipe is used to transport cooling water mixed with recycled plastic pellets to the lifting and filtering mechanism. The lifting and filtering mechanism is provided with an inlet and an outlet, and is used to separate water and recycled plastic pellets during the lifting process. The inlet is connected to the cavity of the conveying pipe; the outlet is used for the passage of recycled plastic pellets. This application achieves the effect of heat dissipation before the recycled plastic pellets are piled up, improving the problem of heat accumulation in the piled-up recycled plastic pellets after pelletizing, and increasing the cooling rate of the recycled plastic pellets. This device can meet basic cooling requirements, but its turbulence capability is weak, failing to allow the plastic pellets to fully contact the cooling gas, resulting in different degrees of heat exchange between different parts of the pellet surface and the cooling gas, leading to uneven cooling. Utility Model Content

[0004] The purpose of this invention is to provide a cooling device for recycled plastic granules to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a recycled plastic pellet cooling device, comprising a cooling tank for cooling recycled plastic pellets, wherein a pre-cooling tank for storing recycled plastic pellets is installed inside the cooling tank, and a rotating shaft is provided inside the pre-cooling tank, wherein two guide cone blocks are welded to the outer periphery of the rotating shaft;

[0006] The bottom of each of the two guide cone blocks is provided with multiple rotating grooves, and springs are connected inside the multiple rotating grooves. One end of each spring is connected to a baffle plate for disrupting the airflow direction. The end of the baffle plate is rotatably disposed inside the rotating groove. A dispersion disc for receiving recycled plastic pellets is installed at the bottom of the rotating shaft. The surface of the dispersion disc is provided with a flow groove for moving the recycled plastic pellets.

[0007] Preferably, the top of the cooling tank is fitted with a cover plate, and a feed hopper is fitted on the top of the cover plate.

[0008] Preferably, a support is welded inside the feed hopper, and a motor is mounted on the top of the support. The output shaft of the motor is connected to the end of the rotating shaft via a coupling.

[0009] Preferably, the bottom of the precooling tank is connected to a cooling pipe, the outer periphery of the cooling pipe is connected to an air inlet pipe for air entry, and the inside of the air inlet pipe is equipped with a protective strip to prevent the overflow of recycled plastic particles.

[0010] Preferably, the precooling tank is connected to an air outlet pipe for air discharge, a fan is installed inside the air outlet pipe, a slide groove is installed inside the air outlet pipe, a filter plate frame is slidably installed inside the slide groove, a plurality of filter plates for filtration are installed inside the filter plate frame, and a handle is installed on the top of the filter plate frame.

[0011] Preferably, the bottom of the cooling pipe is connected to a buffer hopper, and the bottom of the buffer hopper is equipped with a discharge pipe for controlling the discharge of recycled plastic particles.

[0012] Preferably, the bottom of the cooling tank is equipped with a plurality of support feet for support, and the outer periphery of the cooling tank is connected to a coolant replacement pipe for replacing the coolant.

[0013] Compared with the prior art, the technical effects and advantages of this utility model are as follows:

[0014] This recycled plastic pellet cooling device benefits from the structure of the guide cone block and the baffle. The motor drives the rotating shaft and the guide cone block to rotate. When the guide cone block rotates, the baffle can reciprocate at a certain angle in the direction of the rotating groove due to the action of the spring, which turbulents the air and prevents the air from forming a single flow. Compared with the weak turbulence ability of traditional recycled plastic pellet cooling devices, this structure improves the turbulence ability, allowing the plastic pellets to fully contact the cooling gas. The heat exchange between different parts of the pellet surface and the cooling gas is the same, resulting in more uniform cooling.

[0015] This recycled plastic pellet cooling device, thanks to the structure of the air outlet duct and filter plate, allows hot air to be discharged through the air outlet duct and come into contact with the filter plate to filter the air, preventing the discharge of polluted air after contact with the recycled plastic pellets. The filter plate frame can be pulled to replace the filter plate that is in contact with the polluted air. This structure can improve the filtration capacity. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a cross-sectional view of the present invention;

[0019] Figure 3 This is a schematic diagram of the internal structure of the present invention;

[0020] Figure 4 This utility model Figure 1 Enlarged view of point A in the middle;

[0021] Figure 5 This utility model Figure 3 Enlarged view of point B in the middle.

[0022] Explanation of reference numerals in the attached figures:

[0023] In the diagram: 1. Cooling tank; 101. Support leg; 102. Coolant replacement pipe; 103. Air inlet pipe; 104. Cover plate; 105. Feed hopper; 106. Support; 107. Motor; 108. Buffer hopper; 109. Discharge pipe; 110. Rotating shaft; 2. Pre-cooling tank; 201. Guide cone block; 202. Rotating groove; 203. Spring; 204. Baffle plate; 205. Dispersion disc; 206. Flow chute; 3. Cooling pipe; 301. Protective strip; 4. Air outlet pipe; 401. Fan; 402. Slide chute; 403. Filter plate frame; 404. Filter plate; 405. Handle. Detailed Implementation

[0024] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0025] The connection method can be any existing method, such as bonding, welding, or bolting, depending on the actual needs.

[0026] like Figures 1 to 5The device for cooling recycled plastic pellets includes a cooling tank 1 for cooling the recycled plastic pellets. Inside the cooling tank 1 is a pre-cooling tank 2 for storing the recycled plastic pellets. The recycled plastic pellets to be cooled are fed into the pre-cooling tank 2 from the feed hopper 105. When the recycled plastic pellets enter the pre-cooling tank 2, they come into contact with the edge of the guide cone block 201, which slows down the falling speed of the recycled plastic pellets. The coolant in the cooling tank 1 cools the pre-cooling tank 2. The recycled plastic pellets come into contact with the inner wall of the pre-cooling tank 2 and are fully cooled. Inside the pre-cooling tank 2, there is a rotating shaft 110. Two guide cone blocks 201 are welded to the outer periphery of the rotating shaft 110.

[0027] Both guide cone blocks 201 have multiple rotating grooves 202 at their bottoms. Springs 203 are connected inside the rotating grooves 202. One end of each spring 203 is connected to a baffle plate 204 for disrupting airflow direction. The end of the baffle plate 204 is rotatably positioned inside the rotating groove 202. A dispersing disc 205 for collecting recycled plastic pellets is installed at the bottom of the rotating shaft 110. A flow groove 206 for moving the recycled plastic pellets is provided on the surface of the dispersing disc 205. A cover plate 104 is installed on the top of the cooling tank 1. A feed hopper 105 is installed on the top of the cover plate 104. A support 106 is welded inside the feed hopper 105. A motor 107 is installed on the top of 06. The output shaft of the motor 107 is connected to the end of the rotating shaft 110 through a coupling. When the motor 107 is turned on, the motor 107 drives the rotating shaft 110 and the guide cone block 201 to rotate. When the guide cone block 201 rotates, the baffle 204 can reciprocate at a certain angle in the direction of the rotating groove 202 due to the action of the spring 203, which turbulents the air and prevents the air from forming a single flow. This increases the contact with the recycled plastic particles. Uneven cooling will cause stress differences inside the plastic particles. Under stress, the particles are prone to deformation, which will affect the appearance and dimensional accuracy of the product and reduce the product quality.

[0028] The bottom of the precooling tank 2 is connected to a cooling pipe 3, and the outer periphery of the cooling pipe 3 is connected to an air inlet pipe 103 for air entry. The inside of the air inlet pipe 103 is equipped with a protective strip 301 to prevent the overflow of recycled plastic particles. Air enters the cooling pipe 3 and the precooling tank 2 from the air inlet pipe 103.

[0029] The pre-cooling tank 2 is connected to an air outlet pipe 4 for air exhaust. A fan 401 is installed inside the air outlet pipe 4. When the fan 401 is turned on, the cooling air comes into contact with the recycled plastic particles in the cooling pipe 3 and the pre-cooling tank 2, and cools the recycled plastic particles again. A slide groove 402 is installed inside the air outlet pipe 4. A filter plate frame 403 is slidably installed inside the slide groove 402. Multiple filter plates 404 for filtration are installed inside the filter plate frame 403. A handle 405 is installed on the top of the filter plate frame 403. Hot air is discharged through the air outlet pipe 4 and comes into contact with the filter plates 404 to filter the air, preventing the polluted air from coming out after contact with the recycled plastic particles. After a period of time, the filter plate frame 403 can be pulled to replace the filter plates 404 that have been exposed to polluted air.

[0030] The bottom of the cooling pipe 3 is connected to a buffer hopper 108. A discharge pipe 109 for controlling the discharge of recycled plastic granules is installed at the bottom of the buffer hopper 108. The cooled recycled plastic granules contact the dispersing disc 205, enter the cooling pipe 3 through the flow chute 206, and finally enter the buffer hopper 108, exiting through the discharge pipe 109. The bottom of the cooling tank 1 is equipped with multiple support feet 101. A coolant replacement pipe 102 for changing the coolant is connected to the outer periphery of the cooling tank 1. The coolant replacement pipe 102 can be connected to an external water circulation system, including a water tank, water pump, filter, and connecting pipes. The water tank stores the coolant. The water pump draws the coolant from the tank and delivers it to the spray system. After absorbing heat on the surface of the cooling pipe, the coolant flows back to the water tank. The filter is installed on the return pipe to filter out impurities in the coolant, ensuring the cleanliness of the coolant, extending the service life of the device, and preventing impurities from contaminating the plastic granules.

[0031] Working principle

[0032] In operation, the recycled plastic pellet cooling device first feeds the recycled plastic pellets to be cooled into the pre-cooling tank 2 from the feed hopper 105. Upon entering the pre-cooling tank 2, the pellets contact the edge of the guide cone block 201, slowing their descent. The coolant in the cooling tank 1 cools the pre-cooling tank 2, and the pellets contact the inner wall of the pre-cooling tank 2 for thorough cooling. After cooling, the pellets contact the dispersing disc 205 and enter the cooling pipe 3 from the flow chute 206, finally entering the buffer hopper 108 and exiting from the discharge pipe 109. The fan 401 is then turned on, allowing air to enter the cooling pipe 3 and the pre-cooling tank 2 from the air inlet pipe 103. The recycled plastic particles in section 2 come into contact with each other and are cooled again. Then, motor 107 is turned on, which drives the rotating shaft 110 and the guide cone block 201 to rotate. When the guide cone block 201 rotates, the baffle 204 can reciprocate at a certain angle in the direction of the rotating groove 202 due to the action of the spring 203, which turbulents the air and prevents the air from forming a single flow, increasing the contact with the recycled plastic particles. The hot air is discharged through the air outlet 4 and comes into contact with the filter plate 404 to filter the air, preventing the polluted air after contact with the recycled plastic particles from being discharged. After a period of time, the filter plate frame 403 can be pulled to replace the filter plate 404 that is in contact with the polluted air.

[0033] It should be noted that in this article, relational terms such as one and two are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cooling device for recycled plastic pellets, comprising a cooling tank (1) for cooling recycled plastic pellets, characterized in that: The cooling tank (1) is equipped with a pre-cooling tank (2) for storing recycled plastic particles. The pre-cooling tank (2) is equipped with a rotating shaft (110). Two guide cone blocks (201) are welded to the outer periphery of the rotating shaft (110). The bottom of each of the two guide cone blocks (201) is provided with a plurality of rotating grooves (202), and a spring (203) is connected inside the plurality of rotating grooves (202). One end of the spring (203) is connected to a baffle (204) for disrupting the airflow direction. The end of the baffle (204) is rotatably disposed inside the rotating groove (202). The bottom of the rotating shaft (110) is equipped with a dispersing disc (205) for receiving recycled plastic pellets. The surface of the dispersing disc (205) is provided with a flow groove (206) for moving the recycled plastic pellets.

2. The recycled plastic pellet cooling device according to claim 1, characterized in that: The top of the cooling tank (1) is fitted with a cover plate (104), and the top of the cover plate (104) is fitted with a feed hopper (105).

3. The recycled plastic pellet cooling device according to claim 2, characterized in that: The feed hopper (105) has a support (106) welded inside, and a motor (107) is installed on the top of the support (106). The output shaft of the motor (107) is connected to the end of the rotating shaft (110) through a coupling.

4. The recycled plastic pellet cooling device according to claim 1, characterized in that: The bottom of the precooling tank (2) is connected to a cooling pipe (3), and the outer periphery of the cooling pipe (3) is connected to an air inlet pipe (103) for air entry. The inside of the air inlet pipe (103) is equipped with a protective strip (301) to prevent the overflow of recycled plastic particles.

5. A cooling device for recycled plastic pellets according to claim 4, characterized in that: The precooling tank (2) is connected to an air outlet pipe (4) for air discharge. A fan (401) is installed inside the air outlet pipe (4). A slide groove (402) is installed inside the air outlet pipe (4). A filter plate frame (403) is slidably installed inside the slide groove (402). Multiple filter plates (404) for filtration are installed inside the filter plate frame (403). A handle (405) is installed on the top of the filter plate frame (403).

6. A cooling device for recycled plastic pellets according to claim 4, characterized in that: The bottom of the cooling pipe (3) is connected to a buffer hopper (108), and the bottom of the buffer hopper (108) is equipped with a discharge pipe (109) for controlling the discharge of recycled plastic particles.

7. A cooling device for recycled plastic pellets according to claim 1, characterized in that: The bottom of the cooling tank (1) is equipped with a plurality of support feet (101) for support, and the outer periphery of the cooling tank (1) is connected to a coolant replacement pipe (102) for replacing coolant.

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