A multi-stage cooling device suitable for plastic particle extrusion

Abstract

The utility model relates to the technical field of plastic particle cooling, especially to a multistage cooling device suitable for plastic particle extrusion, which comprises a machine body, a rotating shaft is horizontally installed in the machine body, a screw blade is fixedly installed on the rotating shaft, and the rotating shaft is controlled to rotate by a driving assembly; a slot is formed in one end of the mounting rod, a plug rod is slidably inserted into the slot, one end of the rotating shaft penetrates through the machine body, a reciprocating thread is formed on the end surface of the rotating shaft, a sliding plate is threadedly connected to the rotating shaft, and the sliding plate is fixedly connected to the plug rod. The device is designed for single-drive cooperative operation, the driving assembly drives the rotating shaft to rotate, the rotating shaft not only conveys the plastic particles through the screw blade, but also drives the sliding plate and the plug rod to slide in the slot of the mounting rod through the reciprocating thread on the end of the rotating shaft, thereby forming a self-suction water supply effect, and the water storage tank can convey cooling water to the cooling cavity without additional power to drive the water pump.

Description

Technical Field

[0001] This utility model relates to the field of plastic granule cooling technology, and in particular to a multi-stage cooling device suitable for plastic granule extrusion. Background Technology

[0002] In the plastics processing industry, plastic granules extrusion molding is one of the core production processes. Because the extruded plastic granules are at a high temperature, they need to be cooled to meet the requirements of subsequent storage, transportation and secondary processing. Therefore, cooling devices have become an indispensable key equipment on plastic granule production lines.

[0003] Currently, most plastic granule extrusion cooling devices used in the industry adopt an "independent drive" design mode: on the one hand, a separate electric drive device is needed to drive the conveying structure to move and transport the plastic granules in the cooling chamber, ensuring that the granules can fully contact the cooling medium; on the other hand, the cooling water supply system also needs to rely on another independent electric drive device to operate, continuously supplying cooling water to the cooling chamber to exchange heat with the high-temperature plastic granules, thereby achieving the purpose of cooling.

[0004] While the existing "dual independent drive" design in multi-stage cooling devices for plastic granules can meet the cooling and conveying requirements, the simultaneous operation of two independent electric drive devices consumes a lot of electricity. During large-scale continuous production, the accumulated electricity costs put great pressure on the company's cost control. At the same time, the complex structure increases the difficulty of installation and commissioning, and the probability of failure increases, requiring more manpower and time for subsequent maintenance and repair. Utility Model Content

[0005] The purpose of this invention is to address the following shortcomings in the existing technology: the existing multi-stage cooling devices for plastic granules consume a lot of electricity when two independent electric drive devices operate simultaneously, and the structure is complex, increasing the difficulty of installation and debugging and raising the probability of failure. Therefore, this invention proposes a multi-stage cooling device suitable for plastic granule extrusion.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A multi-stage cooling device suitable for extruding plastic granules includes a machine body, a cooling chamber inside the machine body, a rotating rod horizontally rotatably mounted inside the machine body, an auger blade fixedly mounted on the rotating rod, a feeding channel at the top of the machine body, and a first discharge port at one end of the machine body. The rotating rod is controlled to rotate by a drive assembly. A water tank is fixedly installed on the surface of the machine body. An installation rod is fixedly installed on the upper surface of the machine body via an installation component. One end of the installation rod has a slot in which a plug rod is slidably inserted. One end of the installation rod is fixedly connected to a water pipe via a water outlet pipe. Multiple branch water pipes are fixedly installed on the lower surface of the water pipe, and the bottom ends of the multiple branch water pipes all penetrate into the cooling chamber. Multiple water outlet holes smaller than the size of plastic particles are equidistantly opened on the lower surface of the machine body. An inlet pipe connected to the water tank is fixedly installed on the surface of the installation rod. Both the inlet and outlet water pipes are equipped with one-way valves. One end of the rotating rod extends out of the machine body, and the end surface of the rotating rod has a reciprocating thread. A sliding plate is threaded onto the rotating rod, and the sliding plate is fixedly connected to the plug rod.

[0007] Preferably, one end of the machine body is fixedly installed with a mounting shell that communicates with the first discharge port. The mounting shell is provided with a stepped cooling plate. A second discharge port is opened on one side of the mounting shell. A collection frame is fixedly installed on one side of the mounting shell. The surface of the cooling plate is provided with a plurality of drainage holes smaller than the size of the plastic particles.

[0008] Preferably, the drive assembly includes an L-shaped plate fixedly mounted on one side of the machine body and a drive motor fixedly mounted on the surface of the L-shaped plate, wherein the output shaft of the drive motor is fixedly connected to one end of the rotating rod.

[0009] Preferably, the mounting component includes a mounting sleeve fixedly fitted onto the mounting rod and two support plates symmetrically fixedly installed on the side wall of the mounting sleeve, with the bottom ends of both support plates fixedly connected to the surface of the machine body.

[0010] Preferably, the one-way valve in the inlet pipe is directed from the water storage tank to the slot, and the one-way valve in the outlet pipe is directed from the slot to the water pipe.

[0011] Preferably, a blower is fixedly installed on the back of the mounting housing, a ventilation pipe is fixedly connected to the air outlet pipe of the blower, multiple branch air pipes are fixedly connected to the ventilation pipe, and multiple air guide hoods are vertically fixedly installed on the upper surface of the mounting housing, with the multiple branch air pipes respectively fixedly connected to the multiple air guide hoods.

[0012] Compared with the prior art, the beneficial effects of this utility model are: The device employs a "single-drive collaborative operation" design, utilizing a drive assembly to rotate a rotating rod. This rod not only conveys plastic granules via auger blades, but its reciprocating threads at the end also drive a sliding plate and insert rod to slide within the mounting rod slot. The reciprocating motion of the insert rod alters the volume of the slot, and combined with one-way valves on the inlet and outlet pipes, creates a "self-priming water supply" effect. This eliminates the need for an additional electrically driven water pump to transport cooling water from the storage tank to the cooling chamber. Compared to traditional "dual independent drive" devices, this design reduces one set of electrically driven cooling water supply systems, significantly lowering energy consumption. Especially in large-scale continuous production, this greatly reduces long-term electricity costs. It also reduces the number of drive units, simplifies the overall equipment structure, lowers manufacturing and procurement costs, simplifies installation and commissioning processes, reduces subsequent maintenance and repair costs, and avoids production line downtime due to multiple drive failures, indirectly improving production efficiency. Attached Figure Description

[0013] Figure 1 This is a frontal perspective view of a multi-stage cooling device for extruding plastic granules, as proposed in this utility model. Figure 2 This is a top-view three-dimensional structural diagram of a multi-stage cooling device suitable for extruding plastic granules, as proposed in this utility model. Figure 3 This is a schematic diagram of a partial three-dimensional cross-sectional structure of the body in this utility model; Figure 4 This is a partial three-dimensional cross-sectional structural diagram of the mounting shell in this utility model; Figure 5 for Figure 1 Enlarged view of the structure at point A in the middle; Figure 6 for Figure 2 Enlarged view of the structure at point B in the middle.

[0014] In the diagram: 1. Body, 2. Rotating rod, 3. Screw blade, 4. Feed channel, 5. First discharge port, 6. Mounting shell, 7. Cooling plate, 8. Second discharge port, 9. Collection frame, 10. Water storage tank, 11. Mounting rod, 12. Insert rod, 13. Water outlet pipe, 14. Water pipe, 15. Branch water pipe, 16. Water outlet hole, 17. Water inlet pipe, 18. Slide plate, 19. Drive motor, 20. Mounting sleeve, 21. Support plate, 22. Drain hole, 23. Blower, 24. Ventilation pipe, 25. Branch air pipe, 26. Air guide cover. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0016] The terms used in this utility model, such as "upper", "lower", "left", "right", "middle" and "one", are only for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as within the scope of implementation of this utility model.

[0017] Reference Figures 1-3 A multi-stage cooling device suitable for extruding plastic granules includes a machine body 1, a cooling chamber inside the machine body 1, a rotating rod 2 horizontally rotatably mounted inside the machine body 1, an auger blade 3 fixedly mounted on the rotating rod 2, a feeding channel 4 at the top of the machine body 1, and a first discharge port 5 at one end of the machine body 1. The rotating rod 2 is controlled to rotate by a drive assembly, which includes an L-shaped plate fixedly mounted on one side of the machine body 1 and a drive motor 19 fixedly mounted on the surface of the L-shaped plate. The output shaft of the drive motor 19 is fixedly connected to one end of the rotating rod 2.

[0018] A water tank 10 is fixedly installed on the surface of the machine body 1. The water tank 10 is filled with cooling water. A mounting rod 11 is fixedly installed on the upper surface of the machine body 1 via mounting components. Figure 5 As shown, the mounting components include a mounting sleeve 20 fixedly fitted onto the mounting rod 11 and two symmetrical support plates 21 fixedly mounted on the side walls of the mounting sleeve 20. The bottom ends of both support plates 21 are fixedly connected to the surface of the body 1. One end of the mounting rod 11 has a slot, into which a rod 12 is slidably inserted. One end of the mounting rod 11 is fixedly connected to a water pipe 14 via a water outlet pipe 13. Multiple branch water pipes 15 are fixedly installed on the lower surface of the water pipe 14, and the bottom ends of the multiple branch water pipes 15 all penetrate into the cooling chamber. The lower surface of the body 1 has equidistant openings... Multiple water outlet holes 16, smaller than the size of plastic granules, are fixedly installed on the surface of the mounting rod 11. A water inlet pipe 17 connected to the water storage tank 10 is fixedly installed. Both the water inlet pipe 17 and the water outlet pipe 13 are equipped with one-way valves. The one-way valve in the water inlet pipe 17 is directed from the water storage tank 10 to the slot. The one-way valve in the water outlet pipe 13 is directed from the slot to the water pipe 14. One end of the rotating rod 2 extends out of the machine body 1, and the end surface of the rotating rod 2 is provided with reciprocating threads. A sliding plate 18 is threaded onto the rotating rod 2. The sliding plate 18 is fixedly connected to the insertion rod 12.

[0019] The plastic granules to be cooled are fed into the cooling chamber inside the machine body 1 through the feeding channel 4 at the top of the machine body 1. Then, the drive motor 19 is started, and the output shaft of the drive motor 19 begins to rotate. Since its output shaft is fixedly connected to one end of the horizontally rotating rod 2 inside the machine body 1, the rod 2 rotates horizontally in the cooling chamber under the drive of the drive motor 19. The auger blades 3 fixedly installed on the rod 2 rotate together with the rod 2, which plays a role in conveying the plastic granules in the cooling chamber and pushing the plastic granules to move along the length of the cooling chamber toward the first discharge port 5 at one end of the machine body 1. At the same time, the tumbling of the auger blades 3 can also make the plastic granules more evenly distributed in the cooling chamber.

[0020] When the rotating rod 2 rotates, the sliding plate 18 threaded onto the rotating rod 2 will drive the insert rod 12 to slide back and forth in the slot of the mounting rod 11 under the action of the reciprocating thread. When the insert rod 12 slides away from the outlet pipe 13, the volume of the space in the slot increases and the pressure decreases. The cooling water in the water storage tank 10 pushes open the one-way valve in the inlet pipe 17 under the action of the pressure difference and enters the slot through the inlet pipe 17. When the insert rod 12 slides closer to the outlet pipe 13, the volume of the space in the slot decreases and the pressure increases. The cooling water in the slot pushes open the one-way valve in the outlet pipe 13 and is transported through the outlet pipe 13 to the water pipe 14 which is fixedly connected to the outlet pipe 13.

[0021] Multiple branch water pipes 15 fixedly installed on the lower surface of the water pipe 14 distribute the cooling water evenly. Since the bottom ends of the multiple branch water pipes 15 all penetrate into the cooling chamber, the cooling water is directly transported to the plastic particles in the cooling chamber through the branch water pipes 15. It comes into full contact with the plastic particles being transported and turned by the auger blades 3, and performs heat exchange to achieve cooling. The cooling water with increased temperature after heat exchange is discharged from the cooling chamber through multiple water outlet holes 16 equidistantly opened on the lower surface of the body 1. The size of the water outlet holes 16 is smaller than the size of the plastic particles, which can effectively prevent the plastic particles from being discharged with the cooling water.

[0022] Reference Figure 4 One end of the machine body 1 is fixedly installed with a mounting shell 6 that is connected to the first discharge port 5. The mounting shell 6 is provided with a stepped cooling plate 7. A second discharge port 8 is opened on one side of the mounting shell 6. A collection frame 9 is fixedly installed on one side of the mounting shell 6. Multiple drainage holes 22 with a size smaller than the plastic particles are opened on the surface of the cooling plate 7.

[0023] The plastic granules discharged through the first discharge port 5 enter the mounting shell 6 connected to it and fall onto the stepped cooling plate 7 provided inside the mounting shell 6. They slide down the steps one by one. During the sliding process, the residual cooling water on the surface drips out through the drainage holes 22 opened on the surface of the cooling plate 7, thus draining the water. After the plastic granules have been drained, they continue to slide and are finally discharged through the second discharge port 8 on one side of the mounting shell 6, falling into the collection frame 9 fixedly installed on one side of the mounting shell 6 for collection.

[0024] Reference Figure 6 A blower 23 is fixedly installed on the back of the mounting housing 6. The air outlet pipe of the blower 23 is fixedly connected to a ventilation pipe 24. The ventilation pipe 24 is fixedly connected to multiple branch air pipes 25. Multiple air guide hoods 26 are vertically fixedly installed on the upper surface of the mounting housing 6. The multiple branch air pipes 25 are fixedly connected to the multiple air guide hoods 26 respectively.

[0025] When the plastic granules enter the mounting shell 6 connected to the first discharge port 5 and slide layer by layer along the stepped cooling plate 7 provided in the mounting shell 6, the blower 23 fixedly installed on the back of the mounting shell 6 is started.

[0026] After the blower 23 starts running, it generates cold air. The cold air is delivered to the ventilation pipe 24 that is fixedly connected to the blower 23 through the air outlet pipe of the blower 23. The ventilation pipe 24 divides the cold air into multiple branch air pipes 25 that are fixedly connected to it. Since the multiple branch air pipes 25 are fixedly connected to multiple air guide hoods 26 that are vertically fixedly installed on the upper surface of the mounting shell 6, the cold air enters the air guide hood 26 through the branch air pipes 25 and is blown vertically downwards onto the plastic particles sliding on the cooling plate 7 under the guidance of the air guide hood 26.

[0027] The cold air comes into full contact with the plastic granules, which can cool the plastic granules a second time, further reducing the temperature of the granules and improving the cooling effect. On the other hand, it can accelerate the evaporation of residual moisture on the surface of the plastic granules. Together with the water draining holes 22 on the surface of the cooling plate 7, the water is drained, and the plastic granules are dried. Finally, the plastic granules that have completed air cooling and drying slide along the cooling plate 7 to the second discharge port 8 on one side of the mounting shell 6 and fall into the collection frame 9 fixedly installed on one side of the mounting shell 6 for collection.

[0028] This air-cooled structure, in conjunction with a water-cooling system, achieves dual-stage cooling of "water cooling and air cooling." Compared to water cooling alone, it can further reduce the temperature of plastic granules, improve cooling efficiency and effect, and meet the production scenarios with high temperature requirements. At the same time, the cold air generated by the blower 23 fixedly installed on the back of the mounting shell 6 can accelerate the evaporation of moisture on the surface of the granules. Combined with the drainage holes 22 on the surface of the cooling plate 7 to drain the moisture, it can effectively prevent the granules from becoming damp and clumping, ensuring the dryness of the granules for convenient subsequent storage and processing. Furthermore, multiple branch air ducts 25 correspond to multiple air guide hoods 26 vertically fixedly installed on the upper surface of the mounting shell 6, which can evenly deliver cold air to all areas of the cooling plate 7, ensuring that the plastic granules can come into contact with the cold air as they slide along the cooling plate 7, avoiding localized cooling and uneven drying, and improving product quality stability.

[0029] In this invention, the device employs a "single-drive collaborative operation" design. A drive assembly rotates the rotating rod 2. The rotating rod 2 not only conveys plastic granules via the auger blades 3 fixedly mounted on it, but its reciprocating threads at the end also drive the threaded sliding plate 18 and the insert rod 12 to slide within the slot of the mounting rod 11. The reciprocating motion of the insert rod 12 changes the volume of the slot. Combined with the inlet pipe 17 fixedly mounted on the surface of the mounting rod 11 and connected to the water tank 10, and the one-way valve within the outlet pipe 13 fixedly connected to the water pipe 14 at one end of the mounting rod 11, a "self-priming water supply" effect is achieved. This design eliminates the need for an additional electrically driven water pump to supply cooling water from the water storage tank 10 to the cooling chamber inside the machine body 1. Compared to the traditional "dual independent drive" device, this design reduces one set of electrically driven cooling water supply systems, significantly reducing energy consumption. Especially in large-scale continuous production, it can greatly reduce long-term electricity expenses. At the same time, it reduces the number of drive devices, simplifies the overall structure of the equipment, reduces equipment manufacturing and procurement costs, simplifies the installation and commissioning process, reduces the manpower and time costs of subsequent maintenance and repair, avoids production line downtime caused by multiple drive failures, and indirectly improves production efficiency.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "connection", "linking", "fixing", etc., should be interpreted broadly.

[0031] 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 multi-stage cooling device suitable for plastic granule extrusion, comprising a body (1), characterized in that, The machine body (1) has a cooling chamber inside, and a rotating rod (2) is horizontally rotatably installed inside the machine body (1). A screw conveyor blade (3) is fixedly installed on the rotating rod (2). The top of the machine body (1) has a feeding channel (4). One end of the machine body (1) has a first discharge port (5). The rotating rod (2) is controlled to rotate by a drive assembly. A water tank (10) is fixedly installed on the surface of the body (1). An installation rod (11) is fixedly installed on the upper surface of the body (1) through an installation component. One end of the installation rod (11) has a slot, and an insert rod (12) is slidably inserted into the slot. One end of the installation rod (11) is fixedly connected to a water pipe (14) through a water outlet pipe (13). Multiple branch water pipes (15) are fixedly installed on the lower surface of the water pipe (14). The bottom ends of the multiple branch water pipes (15) all penetrate into the cooling chamber. The lower surface of the machine body (1) is provided with multiple water outlet holes (16) with a size smaller than that of plastic particles. The surface of the mounting rod (11) is fixedly installed with a water inlet pipe (17) that is connected to the water storage tank (10). Both the water inlet pipe (17) and the water outlet pipe (13) are provided with one-way valves. One end of the rotating rod (2) extends out of the machine body (1), and the end surface of the rotating rod (2) is provided with a reciprocating thread. A sliding plate (18) is threaded onto the rotating rod (2), and the sliding plate (18) is fixedly connected to the insert rod (12).

2. The multi-stage cooling device for plastic granule extrusion according to claim 1, characterized in that, One end of the machine body (1) is fixedly installed with a mounting shell (6) that communicates with the first discharge port (5). The mounting shell (6) is provided with a stepped cooling plate (7). A second discharge port (8) is opened on one side of the mounting shell (6). A collection frame (9) is fixedly installed on one side of the mounting shell (6). The surface of the cooling plate (7) is provided with multiple drainage holes (22) smaller than the size of the plastic particles.

3. The multi-stage cooling device for plastic granule extrusion according to claim 1, characterized in that, The drive assembly includes an L-shaped plate fixedly installed on one side of the body (1) and a drive motor (19) fixedly installed on the surface of the L-shaped plate. The output shaft of the drive motor (19) is fixedly connected to one end of the rotating rod (2).

4. A multi-stage cooling device for plastic granule extrusion according to claim 1, characterized in that, The mounting components include a mounting sleeve (20) fixedly fitted onto the mounting rod (11) and two support plates (21) symmetrically fixedly installed on the side wall of the mounting sleeve (20). The bottom ends of the two support plates (21) are fixedly connected to the surface of the body (1).

5. A multi-stage cooling device for plastic granule extrusion according to claim 1, characterized in that, The one-way valve in the inlet pipe (17) is directed from the water storage tank (10) to the slot, and the one-way valve in the outlet pipe (13) is directed from the slot to the water pipe (14).

6. A multi-stage cooling device for plastic granule extrusion according to claim 2, characterized in that, A blower (23) is fixedly installed on the back of the mounting housing (6). A ventilation pipe (24) is fixedly connected to the air outlet pipe of the blower (23). Multiple branch air pipes (25) are fixedly connected to the ventilation pipe (24). Multiple air guide hoods (26) are vertically fixedly installed on the upper surface of the mounting housing (6). The multiple branch air pipes (25) are respectively fixedly connected to the multiple air guide hoods (26).

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