A pre-kibbling air cooling device using a centrifugal fan

Abstract

The utility model relates to the field of air cooling equipment discloses a kind of cutting front air cooling equipment of application centrifugal fan, including mounting bracket, the mounting bracket is fixed in the front side of rack, the front side of rack is fixed with shunt pipe, the top surface of mounting bracket is fixed with centrifugal fan body, the output end of centrifugal fan body is fixed communication with one end of shunt pipe, shunt pipe is movably provided with several conveying pipes, the rear end of several conveying pipes is respectively detachably installed with air pipe, the bottom surface of several air pipes is fixed communication with air knife mouth, the inside of rack is equipped with conveyor belt.In the utility model, through the synergies of mounting bracket, rack, shunt pipe, centrifugal fan body, conveying pipe, air pipe, air knife mouth and conveyor belt, efficient, safe cooling to material bar is realized, and equipment cost and operation risk are reduced simultaneously.

Description

Technical Field

[0001] This utility model relates to the technical field of air-cooled equipment, specifically to an air-cooled device for pelletizing pre-granulation using a centrifugal fan. Background Technology

[0002] In the plastics processing industry, pelletizing is a crucial process connecting extrusion molding and subsequent processing, and the cooling effect of the extruded material directly affects the pelletizing quality and finished product performance. Typically, the extruded material is conveyed by a conveyor belt, cooled by air-cooling equipment, and then fed into a pelletizer after reaching the specified temperature.

[0003] Currently, most air-cooled equipment typically uses an array of axial fans directly installed above the conveyor belt. The fans directly blow and cool the material strips. However, this method has the following drawbacks: because the fans are directly exposed to the heat radiation area of ​​the material strips above the conveyor belt, the air they draw in is preheated by the heat of the material strips, resulting in an actual outlet air temperature that is higher than the ambient temperature. Consequently, the cooling efficiency decreases continuously with the extension of the operating time. Utility Model Content

[0004] The purpose of this invention is to provide a pre-pelletizing air-cooling device using a centrifugal fan to solve the problem that, since the fan is directly exposed to the heat radiation area of ​​the material strip above the conveyor belt, the air it draws in is preheated by the heat of the material strip, resulting in the actual outlet air temperature being higher than the ambient temperature, and the cooling efficiency continuously decreasing with the extension of the operating time.

[0005] To achieve the above-mentioned utility model objectives, the present utility model adopts the following technical solution: a pre-granulation air-cooling device using a centrifugal fan, comprising a mounting frame, the mounting frame being fixed to the front side of a machine frame, a distribution pipe being fixed to the front side of the machine frame, a centrifugal fan body being fixed to the top surface of the mounting frame, the output end of the centrifugal fan body being connected and fixed to one end of the distribution pipe, a plurality of conveying pipes being movably arranged on the distribution pipe, air ducts being detachably installed at the rear ends of the plurality of conveying pipes, air blades being connected and fixed to the bottom surfaces of the plurality of air ducts, and a conveyor belt being provided inside the machine frame.

[0006] Preferably, the diversion pipe is connected to and fixed with flexible hoses in connection with several delivery pipes.

[0007] Preferably, a plurality of first U-shaped plates are fixed on the front side of the frame, and two threaded grooves are respectively opened on the front side of the plurality of first U-shaped plates. Second U-shaped plates are detachably installed on the front side of the plurality of first U-shaped plates. The conveying pipe is movably arranged between the first U-shaped plates and the second U-shaped plates. Two threaded holes are respectively opened on the front side of the plurality of second U-shaped plates. First bolts are threaded into the two threaded holes, and the threaded ends of the two first bolts are threaded into the two threaded grooves respectively.

[0008] Preferably, rubber pads are fixed inside the plurality of first U-shaped plates and the plurality of second U-shaped plates.

[0009] Preferably, the shape of each of the air blades is an inverted triangle.

[0010] Preferably, each of the several conveying pipes has a connecting ring fixed to its outer wall, and each of the several connecting rings has a connecting hole on one side. Each of the several air ducts has a mounting ring fixed to its outer wall, and each of the several mounting rings has a mounting hole on one side. Each of the several connecting holes has a second bolt, and the threaded ends of the several second bolts pass through the several connecting holes and the several mounting holes in sequence, and are respectively threaded with nuts.

[0011] Compared with existing technologies, a pre-granulation air-cooling device using a centrifugal fan, which adopts the above-mentioned technical solution, has the following beneficial effects:

[0012] 1. In use, through the synergistic effect of the mounting frame, machine frame, diversion pipe, centrifugal fan body, conveying pipe, air duct, air knife nozzle and conveyor belt, efficient and safe cooling of material strips is achieved, while reducing equipment costs and operational risks.

[0013] Second, in use, this adjustment method is simple and convenient, allowing workers to quickly adjust and fix the height of the conveying pipe. Through the ingenious combination of the first U-shaped plate, the second U-shaped plate, the threaded groove, the threaded hole, and the first bolt, flexible adjustment and reliable fixation of the conveying pipe are achieved. The rubber pad has good elasticity and flexibility, allowing it to closely conform to the outer wall of the conveying pipe, effectively filling the gaps between the conveying pipe and the first and second U-shaped plates, increasing friction, and preventing slippage of the conveying pipe during adjustment or operation. At the same time, the rubber pad also protects the conveying pipe from damage and extends its service life.

[0014] Thirdly, during use, due to the narrowest point at the bottom of the inverted triangle, the airflow forms a high-speed, concentrated airflow jet upon reaching the bottom, forcefully ejected from the narrowest point of the air knife nozzle. This high-speed airflow not only improves cooling efficiency and rapidly cools the surface of the material strip, but also generates a certain pressure, firmly pressing the material strip onto the conveyor belt surface. This effectively prevents the material strip from being blown away by the airflow and causing lateral displacement during the cooling process, ensuring stable conveying and uniform cooling of the material strip on the conveyor belt. The disassembly and assembly structure, consisting of a connecting ring, connecting hole, mounting ring, mounting hole, second bolt, and nut, facilitates the maintenance and cleaning of the air duct and air knife nozzle. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of an embodiment.

[0016] Figure 2 This is a breakdown diagram of an embodiment.

[0017] Figure 3 This is a schematic diagram showing the disassembled connection ring and mounting ring of an embodiment.

[0018] Figure 4 This is a schematic diagram showing the disassembly of the first U-shaped plate and the second U-shaped plate in the embodiment.

[0019] In the diagram: 1. Mounting bracket; 2. Frame; 3. Diverter pipe; 4. Centrifugal fan body; 5. Conveyor pipe; 6. Air duct; 7. Air knife nozzle; 8. Conveyor belt; 9. Hose; 10. First U-shaped plate; 11. Threaded groove; 12. Second U-shaped plate; 13. Threaded hole; 14. First bolt; 15. Rubber pad; 16. Connecting ring; 17. Connecting hole; 18. Mounting ring; 19. Mounting hole; 20. Second bolt; 21. Nut. Detailed Implementation

[0020] The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0021] like Figures 1-3 As shown, a pre-granulation air-cooling device using a centrifugal fan includes a mounting frame 1, which is fixed to the front side of a frame 2. A distribution pipe 3 is fixed to the front side of the frame 2. A centrifugal fan body 4 is fixed to the top surface of the mounting frame 1. The output end of the centrifugal fan body 4 is connected and fixed to one end of the distribution pipe 3. Several conveying pipes 5 are movably arranged on the distribution pipe 3. Air ducts 6 are detachably installed at the rear ends of the several conveying pipes 5. Air nozzles 7 are connected and fixed to the bottom surfaces of the several air ducts 6. A conveyor belt 8 is provided inside the frame 2. Flexible hoses 9 are connected and fixed between the distribution pipe 3 and the several conveying pipes 5.

[0022] In operation, the extruder extrudes plastic that has been melted and plasticized at high temperature into continuous strips. These strips are then placed on the conveyor belt 8 inside the frame 2 and transported by the conveyor belt 8. At this time, the operator starts the centrifugal fan body 4, which quickly draws in cold air. The drawn-in cold air is then transported to the distribution pipe 3 and then enters several conveying pipes 5 through several hoses 9 that are connected and fixed thereto. The cold air continues to move forward in the conveying pipes 5 and enters the air duct 6. Finally, it is sprayed out at high speed from the bottom of the air knife nozzle 7, directly acting on the surface of the strips on the conveyor belt 8 to perform efficient air cooling treatment on the strips.

[0023] Since the diversion pipe 3 and the conveying pipe 5 are connected by a flexible hose 9, this flexible connection method allows the staff to easily adjust the height of the conveying pipe 5, the air duct 6 and the air knife nozzle 7 according to actual production needs, thereby adjusting the distance between the air knife nozzle 7 and the conveyor belt 8 to achieve the best cooling effect.

[0024] Compared to the traditional air-cooling method that uses multiple axial flow fans installed above the conveyor belt 8, this equipment has many advantages. First, by mounting the centrifugal fan body 4 on the side of the mounting frame 1, the source of cold air is farther away from the superheated air near the conveyor belt 8, effectively creating a larger temperature difference, thereby enhancing the cooling effect and allowing the material strip to cool and set more quickly. Second, a single centrifugal fan body 4 can provide sufficient cold air to multiple air nozzles 7, eliminating the need for multiple fans and reducing equipment procurement costs. Moreover, the centrifugal fan body 4 has a high exhaust volume, which can deliver more cold air per unit time, further enhancing the cooling effect and improving production efficiency. In addition, the area above the conveyor belt 8 is the manual operation range, and this equipment has no moving mechanical parts within this range, effectively preventing accidental personal injury accidents and providing a safe and reliable operating environment for workers.

[0025] Through the coordinated action of mounting frame 1, frame 2, diversion pipe 3, centrifugal fan body 4, conveying pipe 5, air duct 6, air knife nozzle 7 and conveyor belt 8, efficient and safe cooling of material strips is achieved, while reducing equipment costs and operational risks.

[0026] like Figures 1-4 As shown, several first U-shaped plates 10 are fixed on the front side of the frame 2. Two threaded grooves 11 are respectively opened on the front side of the several first U-shaped plates 10. Second U-shaped plates 12 are detachably installed on the front side of the several first U-shaped plates 10. The conveying pipe 5 is movably arranged between the first U-shaped plates 10 and the second U-shaped plates 12. Two threaded holes 13 are respectively opened on the front side of the several second U-shaped plates 12. First bolts 14 are threadedly connected in the two threaded holes 13. The threaded ends of the two first bolts 14 are threadedly connected to the two threaded grooves 11 respectively.

[0027] In use, when the height of the conveying pipe 5 needs to be adjusted according to the specifications of the material strip or cooling requirements, the operator only needs to loosen the first bolt 14 in the threaded hole 13 on the front side of the second U-shaped plate 12, so that the threaded end of the first bolt 14 is separated from the threaded groove 11. At this time, the connection between the first U-shaped plate 10 and the second U-shaped plate 12 is loose, and the conveying pipe 5 can be freely raised and lowered between the first U-shaped plate 10 and the second U-shaped plate 12. After the operator adjusts the conveying pipe 5 to a suitable height, the first bolt 14 is screwed into the threaded hole 13, and its threaded end is accurately inserted into the threaded groove 11. The first U-shaped plate 10 and the second U-shaped plate 12 are tightly connected and fixed through the threaded connection, thereby firmly clamping the conveying pipe 5. This adjustment method is simple and convenient, and the operator can quickly complete the height adjustment and fixation of the conveying pipe 5. Through the ingenious combination of the first U-shaped plate 10, the second U-shaped plate 12, the threaded groove 11, the threaded hole 13 and the first bolt 14, the flexible adjustment and reliable fixation of the conveying pipe 5 are achieved.

[0028] like Figure 1 , Figure 2 and Figure 4 As shown, rubber pads 15 are fixed inside the interior of several first U-shaped plates 10 and several second U-shaped plates 12.

[0029] In use, when the conveying pipe 5 is clamped between the first U-shaped plate 10 and the second U-shaped plate 12, the rubber pad 15 plays an important role. The rubber pad 15 has good elasticity and flexibility, which can fit tightly against the outer wall of the conveying pipe 5, effectively filling the gap between the conveying pipe 5 and the first U-shaped plate 10 and the second U-shaped plate 12, increasing the friction, and preventing the conveying pipe 5 from sliding during adjustment or operation. At the same time, the rubber pad 15 can also protect the conveying pipe 5 from damage and extend its service life.

[0030] like Figures 1-3 As shown, several air knife nozzles 7 are all inverted triangles in shape, several conveying pipes 5 are fixed with connecting rings 16 on their outer walls, several connecting rings 16 are provided with connecting holes 17 on one side, several air ducts 6 are fixed with mounting rings 18 on their outer walls, several mounting rings 18 are provided with mounting holes 19 on one side, several connecting holes 17 are provided with second bolts 20, and the threaded ends of several second bolts 20 pass through several connecting holes 17 and several mounting holes 19 in sequence, and are respectively threaded with nuts 21.

[0031] In use, since the shape of several air knife nozzles 7 is designed as an inverted triangle, when cold air is delivered from the air duct 6 to the air knife nozzle 7, after entering the inverted triangle structure of the air knife nozzle 7, the airflow will gradually converge and accelerate inside the air knife nozzle 7. Since the bottom of the inverted triangle is the narrowest, the airflow will form a high-speed, concentrated airflow jet when it reaches the bottom, and forcefully spray out from the narrowest part of the bottom of the air knife nozzle 7. This high-speed airflow can not only improve the cooling efficiency and make the surface of the material strip cool down quickly, but also generate a certain pressure to press the material strip firmly on the surface of the conveyor belt 8, effectively preventing the material strip from being blown by the airflow and causing lateral displacement during the cooling process, thus ensuring the stable conveying and uniform cooling of the material strip on the conveyor belt 8.

[0032] When it is necessary to disassemble and assemble the air duct 6 and the air knife nozzle 7, such as for cleaning, maintenance or replacement, the operator only needs to loosen the nut 21 and pull the second bolt 20 out of the connecting hole 17 and the mounting hole 19. At this time, the connection between the connecting ring 16 and the mounting ring 18 is released, and the air duct 6 is separated from the delivery pipe 5. The operator can then remove the air duct 6 and the air knife nozzle 7 for the corresponding operation. After cleaning or maintenance, align the mounting ring 18 of the air duct 6 with the connecting ring 16 of the delivery pipe 5, align the mounting hole 19 with the connecting hole 17, then insert the second bolt 20 and tighten the nut 21 to firmly connect the air duct 6 and the delivery pipe 5 and restore the normal operation of the equipment. The entire disassembly and assembly process is simple and quick, without the need for professional technicians and complicated tools. The operator can complete the operation in a short time. The disassembly and assembly structure composed of the connecting ring 16, the connecting hole 17, the mounting ring 18, the mounting hole 19, the second bolt 20 and the nut 21 provides convenience for the maintenance and cleaning of the air duct 6 and the air knife nozzle 7.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A pre-granulation air-cooling device using a centrifugal fan, comprising a mounting frame (1) fixed to the front side of a frame (2), characterized in that, A diversion pipe (3) is fixed to the front side of the frame (2), and a centrifugal fan body (4) is fixed to the top surface of the mounting frame (1). The output end of the centrifugal fan body (4) is connected and fixed to one end of the diversion pipe (3). Several conveying pipes (5) are movably arranged on the diversion pipe (3). Air ducts (6) are detachably installed at the rear ends of the several conveying pipes (5). Air knife nozzles (7) are connected and fixed to the bottom surfaces of the several air ducts (6). A conveyor belt (8) is provided inside the frame (2).

2. The pre-granulation air-cooling device using a centrifugal fan according to claim 1, characterized in that: The diversion pipe (3) is connected to several delivery pipes (5) by hoses (9).

3. A pre-granulation air-cooling device using a centrifugal fan according to claim 2, characterized in that: The front side of the frame (2) is fixed with several first U-shaped plates (10), and the front side of each of the several first U-shaped plates (10) is provided with two threaded grooves (11). The front side of each of the several first U-shaped plates (10) is detachably installed with a second U-shaped plate (12). The conveying pipe (5) is movably arranged between the first U-shaped plates (10) and the second U-shaped plates (12). The front side of each of the several second U-shaped plates (12) is provided with two threaded holes (13). The two threaded holes (13) are respectively threaded with first bolts (14). The threaded ends of the two first bolts (14) are respectively threaded into the two threaded grooves (11).

4. A pre-granulation air-cooling device using a centrifugal fan according to claim 3, characterized in that: Rubber pads (15) are fixed inside the interior of several first U-shaped plates (10) and several second U-shaped plates (12).

5. A pre-granulation air-cooling device using a centrifugal fan according to claim 1, characterized in that: The shape of several of the aforementioned air blades (7) is an inverted triangle.

6. A pre-granulation air-cooling device using a centrifugal fan according to claim 5, characterized in that: A connecting ring (16) is fixed to the outer wall of each of the several conveying pipes (5). A connecting hole (17) is opened on one side of each of the several connecting rings (16). An mounting ring (18) is fixed to the outer wall of each of the several air ducts (6). An mounting hole (19) is opened on one side of each of the several mounting rings (18). A second bolt (20) is provided in each of the several connecting holes (17). The threaded end of each of the several second bolts (20) passes through the several connecting holes (17) and the several mounting holes (19) in sequence, and is threadedly connected to a nut (21) respectively.

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