Cooling device for plastic granulation processing

Abstract

The utility model discloses a cooling device for plastic granulation processing, which comprises a discharge pipe arranged at the discharge end of a granulator and an eduction pipe arranged below the discharge pipe, and the input end of the eduction pipe is used for receiving plastic particles output by the discharge pipe; the air blowing mechanism is arranged on one side of the input end of the eduction pipe, and the storage tank is arranged on one side of the output end of the eduction pipe; the eduction tube comprises a cooling jacket arranged on the outer side of the middle section of the discharge tube in a coating manner; according to the utility model, the outer side of the eduction tube is coated with the cooling jacket. When the cooling jacket is opened, the cooling jacket can conduct heat exchange on passing plastic particles, and a low-temperature area is formed in the eduction tube. The direct heat exchange is beneficial to rapidly reducing the temperature of the particles, preventing the temperature of a local area from being too high, and reducing the heat accumulation phenomenon caused by accumulation.

Description

Technical Field

[0001] The utility model relates to a cooling device for plastic granulation processing, belonging to the technical field of plastic granulation processing. Background Art

[0002] Cooling is a crucial step in the plastic pelletizing process. During the pelletizing process, the plastic is heated and melted, forming a liquid. This molten plastic needs to be cooled to solidify and form stable solid pellets. Cooling allows the plastic pellets to better maintain their intended size and shape, ensuring consistent and high-quality production. Uncooled molten plastic can easily cause pellets to stick together. Cooling prevents this, ensuring that each pellet remains independent. The efficiency of the cooling process directly impacts production efficiency.

[0003] In the plastic pelletizing process, the increased efficiency of mechanized production has led to faster pellet production. However, this high-speed production has brought a series of cooling-related problems, especially local overheating and uneven cooling during pellet cooling, which can cause pellet sticking.

[0004] Due to rapid production, large quantities of particles are generated in a short period of time, and existing cooling systems may not be able to handle these high-temperature particles in a timely manner. When the capacity or efficiency of the cooling unit is insufficient, particles tend to accumulate, and heat cannot be dissipated quickly, resulting in localized excessive temperatures. Due to accumulation or uneven cooling, some areas may have higher temperatures than others. This causes heat accumulation, causing some particles to remain at higher temperatures. The surface of overheated particles may soften, leading to adhesion between particles. Moreover, without sufficient cooling time or heat dissipation conditions, the particles may not reach a stable solid state. Uneven cooling may cause residual stress within the particles, affecting their physical properties and subsequent processing performance.

[0005] Therefore, the purpose of this study is to design a cooling device that can effectively improve the cooling efficiency in a rapid production process and overcome the problems of particle accumulation and adhesion. Utility Model Content

[0006] In view of the deficiencies in the prior art, the purpose of this utility model is to provide a cooling device for plastic granulation processing to solve the problems of the prior art.

[0007] In order to achieve the above purpose, the present invention is implemented through the following technical solutions:

[0008] A cooling device for plastic granulation processing, comprising:

[0009] A discharge pipe is provided at the discharge end of the granulator, a lead-out pipe is provided below the discharge pipe, and an input end of the lead-out pipe receives the plastic particles outputted from the discharge pipe;

[0010] An air blowing mechanism is provided on the input end side of the outlet pipe, and a storage tank is provided on the output end side of the outlet pipe;

[0011] The outlet pipe includes a cooling jacket covering the outer side of the middle section of the outlet pipe;

[0012] A control module, the control module being electrically connected to the cooling jacket and the air blowing mechanism;

[0013] The control module controls the opening / closing of the cooling jacket. When the cooling jacket is opened, heat exchange between the cooling jacket and the outlet pipe forms a low-temperature zone inside the outlet pipe.

[0014] The blower mechanism is controlled to be turned on / off by the control module. When the blower mechanism is turned on, air flow is input into the outlet pipe. The air flow carries the plastic particles through the low temperature zone and enters the storage tank.

[0015] As a further improvement, the outlet pipe includes a receiving portion provided below the discharge pipe, a first interface is provided above the receiving portion, and a second interface is provided on the side of the receiving portion;

[0016] The first interface is connected to the discharge pipe, and the second pipe part is connected to the blowing mechanism.

[0017] As a further improvement, the outlet pipe is a cooling portion that extends obliquely upward from one end of the receiving portion, and the cooling jacket covers the cooling portion.

[0018] As a further improvement, the outlet pipe has a connecting portion extending horizontally from the end of the highest point of the cooling portion to the ground, and the connecting portion is connected to the storage tank.

[0019] As a further improvement, a screening portion is further provided at the junction of the connecting portion and the cooling portion. The screening portion is provided with a plurality of through holes, through which impurities are screened and the wind speed is reduced.

[0020] As a further improvement, the cooling jacket includes an exchange tube arranged around the outer annular surface of the outlet tube, a protective sheet sleeved on the outside of the outlet tube and covering the exchange tube, the head and tail ends of the exchange tube and the outside, and a cooling pump connected to the head and tail ends of the exchange tube, and the cooling pump controls the flow of coolant inside the exchange tube.

[0021] As a further improvement, a frosted layer is provided on the inner side of the cooling portion of the outlet pipe.

[0022] As a further improvement, the inclination range of the cooling area of ​​the outlet pipe is 35°-55°.

[0023] The beneficial effects of the utility model are:

[0024] The utility model controls the opening / closing of the blower mechanism through the control module. When the blower mechanism is turned on, air flow is input into the inside of the outlet pipe. The air flow carries the plastic particles through the low temperature zone and enters the storage tank.

[0025] The outlet pipe is covered with a cooling jacket. When the cooling jacket is turned on, it exchanges heat with the passing plastic pellets, creating a low-temperature zone inside the outlet pipe. This direct heat exchange helps quickly reduce the pellet temperature, preventing localized overheating and minimizing heat accumulation caused by accumulation.

[0026] By installing an air blower on one side of the outlet pipe, it can be activated when needed to provide airflow inside the pipe. This airflow promotes the movement of plastic pellets within the pipe and further accelerates the pellet cooling process. The physical movement distributes the temperature more evenly within and on the surface of the pellets, reducing the risk of softening and sticking.

[0027] The above-mentioned setting can effectively solve the problem of uneven cooling, improve cooling efficiency and quality, and ensure that the produced plastic particles have good stability and consistency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 The utility model is a schematic diagram of the three-dimensional structure of a cooling device for plastic granulation processing.

[0030] Figure 2 It is a detailed structural diagram of an outlet pipe of the utility model.

[0031] Figure 3 It is a perspective structural diagram of a cooling jacket of the utility model.

[0032] Figure 4 It is a schematic diagram of the partial cross-sectional structure of the cooling portion of an outlet pipe of the utility model.

[0033] Figure 5This is a schematic diagram of module control of a cooling device for plastic granulation processing in the utility model.

[0034] Figure 6 The utility model is a working schematic diagram of a cooling device for plastic granulation processing after overall installation.

[0035] 1. Granulator; 2. Discharge pipe; 3. Export pipe; 4. Control module; 5. Blowing mechanism; 6. Storage tank; 7. Cooling jacket; 31. Receiving part; 311. First interface; 312. Second interface; 32. Cooling part; 33. Connecting part; 34. Screening part; 35. Frosted layer; 71. Exchange tube; 72. Protective sheet; 73. Cooling pump. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0037] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically specified.

[0038] Reference Figure 1-6 As shown, a cooling device for plastic granulation processing includes:

[0039] A discharge pipe 2 is provided at the discharge end of the granulator 1, and a lead-out pipe 3 is provided below the discharge pipe 2, wherein the input end of the lead-out pipe 3 receives the plastic pellets outputted from the discharge pipe 2;

[0040] An air blowing mechanism 5 is provided at one side of the input end of the outlet pipe 3, and a storage tank 6 is provided at the output end of the outlet pipe 3;

[0041] The outlet pipe 3 includes a cooling jacket 7 provided on the outside of the middle section of the discharge pipe 2;

[0042] A control module 4, wherein the control module 4 is electrically connected to the cooling jacket 7 and the air blowing mechanism 5;

[0043] The control module 4 controls the opening / closing of the cooling jacket 7. When the cooling jacket 7 is opened, heat exchange between the cooling jacket 7 and the outlet pipe 3 is performed, thereby forming a low-temperature zone inside the outlet pipe 3.

[0044] When in use, the cooling device is installed at the discharge end of the granulator 1 to ensure that the discharge pipe 2, the outlet pipe 3, the blowing mechanism 5 and the storage tank 6 are connected smoothly.

[0045] When the granulator 1 starts to produce plastic granules, the control module 4 is started.

[0046] The cooling jacket 7 can be opened or closed by the control module 4, and cooperated with the air flow formed by the blower to drive the plastic particles falling through the discharge pipe 2 to move in the outlet pipe 3 and pass through the low temperature zone to cool the passing particles.

[0047] Advantages over existing technologies: The cooling jacket 7 directly exchanges heat with the outlet pipe 3, rapidly reducing the particle temperature. This is more efficient than traditional systems that rely solely on natural cooling or air cooling alone. The control module 4 allows for flexible adjustment of the operating status of the cooling jacket 7 and air blower 5, enabling real-time management of the cooling process. This automated control reduces manual intervention and improves the accuracy and reliability of the system.

[0048] Due to the dual effects of the cooling jacket 7 and the blast system, it is possible to ensure that the temperature of the particles is evenly reduced, thereby reducing the problems of local overheating and particle adhesion.

[0049] This solution can dynamically adjust the cooling strategy based on production speed and environmental changes, adapting to different production conditions and thus improving production efficiency. By precisely controlling the cooling process, the system may consume less energy, which also helps extend equipment life and reduce operating costs.

[0050] The blower mechanism 5 is turned on / off by the control module 4 . When the blower mechanism 5 is turned on, air flow is input into the outlet pipe 3 . The air flow carries the plastic particles through the low temperature zone and enters the storage tank 6 .

[0051] A cooling jacket 7 is wrapped around the outside of the outlet pipe 3. When the cooling jacket 7 is turned on, it can exchange heat with the passing plastic particles, forming a low-temperature zone inside the outlet pipe 3. This direct heat exchange helps to quickly reduce the temperature of the particles, prevent localized overheating, and reduce heat accumulation caused by accumulation.

[0052] By installing the air blowing mechanism 5 on one side of the outlet pipe 3, it can be activated when needed to provide airflow into the outlet pipe 3. This airflow promotes the movement of plastic particles within the outlet pipe 3 and further accelerates the cooling process of the particles. Through physical movement, the temperature inside and on the surface of the particles is more evenly distributed, reducing the risk of softening and sticking.

[0053] The above-mentioned setting can effectively solve the problem of uneven cooling, improve cooling efficiency and quality, and ensure that the produced plastic particles have good stability and consistency.

[0054] The outlet pipe 3 includes a receiving portion 31 positioned below the discharge pipe 2. A first port 311 is positioned above the receiving portion 31, and a second port 312 is positioned on the side of the receiving portion 31. The first port 311 communicates with the discharge pipe 2, while the second portion communicates with the air blowing mechanism 5. The outlet pipe 3 extends upwardly from one end of the receiving portion 31 to form a cooling portion 32, which is enclosed by the cooling jacket 7. A connecting portion 33 extends horizontally from the highest point of the cooling portion 32 to the ground, connecting the outlet pipe 3 to the storage tank 6.

[0055] By extending the outlet pipe 3 upward at an angle from the receiving portion 31 to form a cooling portion 32, the plastic particles are forced to rise against gravity during the cooling process. This prolongs the particle residence time within the outlet pipe 3, thereby increasing cooling time and efficiency. Furthermore, the cooling jacket 7 covering the inclined cooling portion 32 lowers the particle temperature through extended heat exchange.

[0056] Due to the inclined portion, the particles roll and turn more fully in the tube, which provides more surface area to contact with the cold air and further improves the cooling efficiency.

[0057] During the inclined rising process, the particles are continuously rotated and tumbled, avoiding long-term contact between particles and reducing adhesion or deformation caused by high temperature.

[0058] After the particles rise and pass through the cooling portion 32, the connecting portion 33 extends horizontally, and the particles begin to slide down into the storage tank 6 under the action of gravity. This ensures the continuity and stability of the material flow and reduces the risk of blockage.

[0059] Since the particles move along the inclined and horizontal pipes, the pipe design is easier to observe, maintain and clean, reducing the difficulty of operation and equipment maintenance costs.

[0060] In order to remove some of the residual connecting materials and make the plastic particles have a better shape, a frosted layer 35 is provided on the inner side surface of the cooling portion 32 of the outlet pipe 3.

[0061] A screening portion 34 is further provided at the junction of the connecting portion 33 and the cooling portion 32 . The screening portion 34 is provided with a plurality of through holes, through which impurities are screened and wind speed is reduced.

[0062] The frosted layer 35 on the inner surface of the cooling section 32 of the outlet pipe 3 is specifically designed to rub and remove residual binder from the surface of the pellets. This design allows the pellets to continuously rub away small attached materials as they pass through the pipe, thereby improving the surface quality of the plastic pellets and ensuring a uniform and smooth pellet shape.

[0063] By removing irregular small-section connecting materials through the frosting layer 35 , the quality and consistency of the final product particles can be ensured, which helps to meet higher requirements for product specifications and improve product competitiveness.

[0064] By designing a screening portion 34 at the junction of the connecting portion 33 and the cooling portion 32, which contains a plurality of through holes for screening out impurities, it is possible to effectively separate larger impurities or incompletely formed particles and prevent them from entering the storage tank 6, thereby improving the purity of the final product.

[0065] Since the specifications of plastic particles vary, in this embodiment, the plastic particles are 5-8 mm in size and the through-hole size is 2-3 mm.

[0066] The screening portion 34 can also reduce the wind speed through the designed through holes, thereby preventing the particles from being blown out or splashing due to excessive airflow during the process of horizontal movement to the storage tank 6, thereby ensuring that the particles reach the storage tank 6 smoothly.

[0067] The cooling portion 32 of the outlet pipe 3 has an inclination angle of 35° to 55°. In this embodiment, the cooling portion 32 of the outlet pipe 3 has an inclination angle of 45°.

[0068] Within the inclination angle range of 35°-55°, the proper combination of gravity and friction helps the particles flow smoothly in the pipe, avoiding stagnation and accumulation.

[0069] At the same time, the inclination angle appropriately prolongs the residence time of the particles in the cooling zone, allowing them to have more sufficient contact with the cooling environment, thereby improving the cooling effect.

[0070] Moreover, the inclined design enables the particles to flip frequently during the rolling process, increasing the contact area with the cooling medium and further improving the heat exchange efficiency.

[0071] The cooling jacket 7 includes an exchange tube 71 arranged around the outer annular surface of the outlet tube 3, a protective sheet 72 sleeved on the outside of the outlet tube 3 and covering the exchange tube 71, and a cooling pump 73 connecting the head and tail ends of the exchange tube 71 to the outside. The cooling pump 73 controls the flow of coolant inside the exchange tube 71.

[0072] By surrounding the exchange tube 71 on the outer annular surface of the outlet pipe 3, the surface area of ​​the entire outlet pipe 3 is maximized to be in contact with the coolant, which can evenly reduce the temperature of the material in the outlet pipe 3 and improve the cooling efficiency.

[0073] The protective sheet 72 covers the outside of the exchange tube 71 and can effectively protect the exchange tube 71 from external damage or environmental influences, such as mechanical damage, corrosion, etc., thereby extending the service life of the system components.

[0074] The protective sheet 72 is a heat-insulating sheet.

[0075] The blower mechanism 5 in this embodiment is a device for providing airflow, widely used in industry, agriculture, and other areas requiring air flow. Its primary function is to generate airflow to meet requirements such as equipment cooling, material conveying, and ventilation and dust removal. The blower's motor drives the impeller to rotate. The impeller's blades draw in ambient air and, through the high-speed rotation of the blades, expel it, creating an airflow with a certain pressure and velocity.

[0076] There are several main types of blower mechanisms 5, including centrifugal fans, axial flow fans, and Roots blowers. Each type is suitable for different applications. For example, centrifugal fans are often used in high-pressure applications, while axial flow fans are suitable for medium- and low-pressure, high-flow applications.

[0077] In this embodiment, a centrifugal fan is used.

[0078] The cooling pump 73 in this embodiment is a device used to circulate coolant to maintain a stable temperature within the system. It is widely used in various industrial and commercial systems, such as cooling towers, heat exchange systems, machine tool cooling, HVAC systems, and automotive engines. Coolant pump 73 typically uses centrifugal force generated by the rotation of its impeller, drawing coolant into the pump's inlet and discharging it under pressure through the outlet. This flow circulates throughout the cooling system before returning to the system in a closed-loop cycle.

[0079] It should be noted that the device structure and drawings of the present invention mainly describe the principle of the present invention. In terms of the technology of the design principle, the settings of the device's power mechanism, power supply system, and control system are not fully described. However, those skilled in the art can clearly understand the details of its power mechanism, power supply system, and control system on the premise that they understand the principle of the above-mentioned utility model. The control method of the application document is automatic control through a controller, and the control circuit of the controller can be implemented by simple programming by those skilled in the art.

[0080] The standard parts used can be purchased from the market and can be customized according to the description in the specification and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the components known to technical personnel in this field, their structures and principles can be known to these technical personnel through technical manuals or through conventional experimental methods.

[0081] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A cooling device for plastic granulation processing, characterized in that: include: A discharge pipe (2) is provided at the discharge end of the granulator (1), an outlet pipe (3) is provided below the discharge pipe (2), and an input end of the outlet pipe (3) receives the plastic particles output from the discharge pipe (2); an air blowing mechanism (5) provided on the input end side of the outlet pipe (3), and a storage tank (6) provided on the output end side of the outlet pipe (3); The outlet pipe (3) includes a cooling jacket (7) covering the outer side of the middle section of the discharge pipe (2); A control module (4), wherein the control module (4) is electrically connected to the cooling jacket (7) and the air blowing mechanism (5); The control module (4) controls the opening / closing of the cooling jacket (7). When the cooling jacket (7) is opened, heat exchange is performed between the cooling jacket (7) and the outlet pipe (3), thereby forming a low-temperature zone inside the outlet pipe (3); The control module (4) controls the opening / closing of the air blowing mechanism (5). When the air blowing mechanism (5) is turned on, air flow is input into the interior of the outlet pipe (3). The air flow carries the plastic particles through the low-temperature zone and enters the storage tank (6).

2. A cooling device for plastic granulation processing according to claim 1, characterized in that: The outlet pipe (3) includes a receiving portion (31) arranged below the discharge pipe (2), a first interface (311) is arranged above the receiving portion (31), and a second interface (312) is arranged on the side of the receiving portion (31); The first interface (311) is connected to the discharge pipe (2), and the second interface (312) is connected to the blowing mechanism (5).

3. A cooling device for plastic granulation processing according to claim 2, characterized in that: The outlet pipe (3) has a cooling portion (32) extending obliquely upward from one end of the receiving portion (31), and the cooling jacket (7) covers the cooling portion (32).

4. A cooling device for plastic granulation processing according to claim 3, characterized in that: The outlet pipe (3) extends from the high point end of the cooling portion (32) to a connecting portion (33) extending horizontally to the ground, and the connecting portion (33) is connected to the storage tank (6).

5. A cooling device for plastic granulation processing according to claim 4, characterized in that: A screening portion (34) is also provided at the junction of the connecting portion (33) and the cooling portion (32). The screening portion (34) is provided with a plurality of through holes, through which impurities are screened and wind speed is reduced.

6. A cooling device for plastic granulation processing according to claim 1, characterized in that: The cooling jacket (7) includes an exchange tube (71) arranged around the outer annular surface of the outlet tube (3), a protective sheet (72) sleeved on the outside of the outlet tube (3) and covering the exchange tube (71), and a cooling pump (73) connected to the front and rear ends of the exchange tube (71) and the outside, wherein the cooling pump (73) controls the flow of coolant inside the exchange tube (71).

7. A cooling device for plastic granulation processing according to claim 6, characterized in that: A frosted layer (35) is provided on the side surface of the cooling portion (32) of the outlet pipe (3).

8. A cooling device for plastic granulation processing according to claim 7, characterized in that: The cooling portion (32) of the outlet pipe (3) has an inclination range of 35°-55°.

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