EPP plastic raw material drying device

Abstract

The utility model discloses an EPP plastic raw material drying device which comprises a drying cylinder, a feeding pipe is arranged above one end of the drying cylinder, a discharging pipe is arranged below the other end of the drying cylinder, a driving assembly is arranged on the side edge of the end portion of the drying cylinder, an air heater is arranged on the side edge of the other end portion of the drying cylinder, and the driving assembly is connected with the air heater. A driving shaft is rotationally arranged in the drying cylinder, a plurality of spiral conveying paddles are arranged on the driving shaft, one end of the driving shaft is connected with a driving assembly, the other end of the driving shaft penetrates through the drying cylinder and extends towards the air heater, the interior of the drying cylinder is of a hollow structure, and a plurality of first-stage air outlet holes are formed in the surface of the drying cylinder; and an air outlet pipe is arranged above the drying cylinder, one side of the air heater is connected with a communicating pipe, and the communicating pipe is rotationally connected with the driving shaft. The scheme can prolong the drying time and improve the drying effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of raw material drying, and in particular relates to an EPP plastic raw material drying device. Background Art

[0002] EPP plastic is a polypropylene plastic foam material with excellent performance. It is a highly crystalline polymer. With its unique and superior performance, it has become the fastest-growing environmentally friendly new pressure-resistant, cushioning and thermal insulation material. EPP products have excellent shock absorption and energy absorption properties, high recovery rate after deformation, good heat resistance, chemical resistance, oil resistance and thermal insulation. In addition, its light weight can significantly reduce the weight of items. EPP plastic is mainly produced from polypropylene, a thermoplastic resin made by propylene polymerization. It is a white waxy material with a transparent and light appearance. Polypropylene has good heat resistance. Products can be sterilized at temperatures above 100°C and will not deform at 150°C without external forces. Because polypropylene can be mixed with dust and other impurities during storage and transportation, the EPP plastic raw materials need to be cleaned and dried before production.

[0003] Chinese patent application number 2021217536469 discloses a drying device for EPP plastic raw materials, including a support frame, support legs, a rotating box, a storage trough and a rotating trough. The support frame is equipped with support legs, and the support frame is provided with a rotating box. The rotating box is equipped with a rotating shaft, a vent pipe is connected to the rotating shaft, an intake pipe is connected to the vent pipe, a first feed pipe is provided on the rotating shaft, and a rotating wheel is installed on the rotating shaft, a crawler is connected to the rotating wheel, and a motor is connected to the crawler. The drying device for EPP plastic raw materials is provided with a vent pipe, which discharges the hot air in the intake pipe upward into the atmosphere, and intermittently transports the EPP plastic raw materials into the vent pipe through the first feed pipe and the second feed pipe, so that the EPP plastic raw materials are dispersed and fall in the vent pipe.

[0004] The above solution has the effect of making the EPP plastic raw material dry more thoroughly and evenly. However, since the falling time of the EPP plastic raw material is short, the drying effect of the hot air is limited in a short time, and therefore the EPP plastic raw material cannot be fully dried. Utility Model Content

[0005] In order to solve the above problems, the utility model provides an EPP plastic raw material drying device, comprising a drying cylinder, a feed pipe is provided above one end of the drying cylinder, a discharge pipe is provided below the other end of the drying cylinder, a driving assembly is provided on the side of the end of the drying cylinder, a hot air blower is provided on the side of the other end of the drying cylinder, a drive shaft is provided for rotation inside the drying cylinder, a plurality of spiral conveying blades are provided on the drive shaft, one end of the drive shaft is connected to the drive assembly, and the other end of the drive shaft passes through the drying cylinder and extends toward the hot air blower, the interior of the drying cylinder is a hollow structure and a plurality of first-level air outlet holes are provided on the surface of the drying cylinder, an air outlet pipe is provided above the drying cylinder, and a connecting pipe is connected to one side of the hot air blower, and the connecting pipe is rotatably connected to the drive shaft.

[0006] Preferably, a stirring rod is connected between adjacent spiral conveying blades, and the stirring rod is arranged parallel to the driving shaft.

[0007] Preferably, the surface of the primary air outlet is connected to an air outlet column, and the surface of the air outlet column is provided with a plurality of secondary air outlets, and the diameter of the secondary air outlet is smaller than that of the primary air outlet.

[0008] Preferably, the drive assembly includes a drive motor, an output end of the drive motor is connected to a first pulley, an end of the drive shaft close to the drive motor is connected to a second pulley, and a conveyor belt is connected between the first pulley and the second pulley.

[0009] Preferably, a flip cover is hinged on the top of the discharge pipe, a handle is connected to the flip cover, a square opening seat is provided in the middle of the discharge pipe, and a valve plug is inserted into the square opening seat.

[0010] The advantages of the utility model are:

[0011] 1. This solution uses a drive assembly to drive the drive shaft, which in turn drives the spiral conveying blades to rotate, so that the EPP plastic raw materials move forward continuously and evenly in the drying drum, increasing the drying time of the EPP plastic raw materials and ensuring that the raw materials are fully stirred and mixed during the drying process, thereby achieving long-term and uniform drying.

[0012] 2. In this solution, a fan blows hot air into the drive shaft through a connecting pipe, and then blows it out through the primary air outlet on the surface of the drying drum. This design allows the hot air to directly and evenly affect the EPP plastic raw materials, improving drying efficiency. At the same time, the hot air drives moisture out of the air outlet duct above the drying drum, ensuring that the ambient humidity inside the drying drum remains low, further enhancing the drying effect.

[0013] 3. This solution features a reversible cover on top of the discharge pipe, allowing for easy monitoring of the material status and other operations during the drying process. Furthermore, a plug-in valve plug is located in the middle of the discharge pipe, allowing for adjustment of the opening to control the discharge speed and flow rate, meeting diverse production requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the external structure diagram of the utility model.

[0015] Figure 2 This is the internal cross-sectional structure diagram of the utility model.

[0016] Figure 3 This is a surface structure diagram of the drive shaft of the utility model.

[0017] In the figure: 1 drying drum, 2 feeding pipe, 3 discharging pipe, 4 hot air blower, 5 driving shaft, 6 spiral conveying blade, 7 air outlet, 8 air outlet pipe, 9 connecting pipe, 10 stirring rod, 11 air outlet column, 12 secondary air outlet, 13 driving motor, 14 first pulley, 15 second pulley, 16 conveyor belt, 17 flip cover, 18 handle, 19 square opening seat, 20 valve plug. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0019] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", "front end", "rear end", "two ends", "one end", "the other end", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on the present invention.

[0020] In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a communication between the two elements. At the same time, when an element is referred to as "fixed on" or "provided on" another element, it can be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. When an element is referred to as being "fixedly connected to" another element, it can be a common fixed connection method such as welding, bolt connection, or gluing connection. In short, for ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. Example 1

[0021] like Figure 1-2 As shown, an EPP plastic raw material drying device includes a drying drum 1, a feed pipe 2 is provided above one end of the drying drum 1, and a discharge pipe 3 is provided below the other end of the drying drum 1. The EPP plastic raw material is poured into the drying drum 1 from the feed pipe 2 and discharged from the discharge pipe 3 after drying. A flip cover 17 is hinged on the top of the discharge pipe 3, and a handle 18 is connected to the flip cover 17. A square opening seat 19 is provided in the middle of the discharge pipe 3, and a valve plug 20 is inserted and pulled out of the square opening seat 19. The flip cover 17 hinged on the top of the discharge pipe 3 and the handle 18 connected thereto allow the operator to easily open the flip cover 17 by pulling the handle 18 when he needs to take out the dried EPP plastic raw material, thereby smoothly discharging the material. This design greatly simplifies the discharge process and improves work efficiency. The design of the valve plug 20 inserted and pulled out of the square opening seat 19 allows the operator to adjust the opening of the discharge pipe 3 according to actual needs. When a large amount of material needs to be discharged quickly, the valve plug 20 can be pulled out to increase the area of ​​the discharge pipe 3; when the discharge speed needs to be precisely controlled, the valve plug 20 can be partially inserted to reduce the area of ​​the discharge pipe 3. This flexible discharge control method helps to meet different production needs.

[0022] A drive assembly is mounted on one end of the drying drum 1, and a hot air blower 4 is mounted on the other end. A rotating drive shaft 5 is mounted on the drying drum 1, and a plurality of spiral conveyor blades 6 are attached to the drive assembly. One end of the drive shaft 5 is connected to the drive assembly. The drive assembly includes a drive motor 13, the output end of which is connected to a first pulley 14. The end of the drive shaft 5 closest to the drive motor 13 is connected to a second pulley 15. A conveyor belt 16 is connected between the first and second pulleys 14 and 15, driving the drive shaft 5. The rotation of the drive assembly drives the drive shaft 5 and the spiral conveyor blades 6, ensuring that the EPP plastic material is continuously and evenly moved forward within the drying drum 1, ensuring that the material is thoroughly stirred and mixed during the drying process, resulting in uniform drying. This helps prevent accumulation or localized overheating of the material during the drying process, improving the drying effect. The rotation of the spiral conveyor blades 6 not only facilitates the movement of the material but also increases the contact area between the material and the hot air, thereby enhancing heat exchange efficiency. At the same time, the continuous movement of the raw materials in the drying drum 1 makes the drying process more continuous and efficient, and reduces the drying time.

[0023] The other end of the drive shaft 5 extends through the drying drum 1 toward the hot air blower 4. The interior of the drying drum 1 is hollow and is equipped with several primary air outlets 7 on its surface. An air outlet duct 8 is located above the drying drum 1. A connecting pipe 9 is connected to one side of the hot air blower 4, which is rotatably connected to the drive shaft 5. A bearing is provided between the connecting pipe 9 and the drive shaft 5 to facilitate rotation. The hot air blower 4 blows a hot air flow through the connecting pipe 9 into the interior of the drive shaft 5. The hot air then flows through the primary air outlet 7 onto the EPP plastic material in the drying drum 1, drying the plastic material. The hot air then drives the moisture out of the air outlet 8 above the drying drum 1. The hot air is evenly distributed through the interior of the drive shaft 5 to every corner of the drying drum 1. It then flows directly onto the EPP plastic material through the primary air outlet 7, ensuring that the material is evenly heated within the drying drum 1. This design avoids the problem of uneven heat distribution and improves drying efficiency and effectiveness. Because the hot air is transmitted within the drive shaft 5, heat loss is minimized, resulting in higher thermal efficiency. At the same time, the hot air flow acts directly on the raw materials, reducing the heat loss in the air, further improving the drying efficiency and reducing energy consumption.

[0024] Combine Figure 3 The surface of the air outlet is connected with an air outlet column 11. Figure 3Only a single air outlet column 11 is shown in the figure, and a number of secondary air outlet holes 12 are provided on the surface of the air outlet column 11. The diameter of the secondary air outlet hole 12 is smaller than that of the primary air outlet hole 7. The design of the secondary air outlet hole 12 enables the hot air flow to be more evenly distributed in the drying drum 1 after passing through the air outlet column 11, forming a more delicate heat distribution. Since the diameter of the secondary air outlet hole 12 is smaller than that of the primary air outlet hole 7, the flow rate of the hot air flow will increase, but the pressure will decrease, thereby achieving more uniform heat diffusion. Since the flow rate of the hot air flow increases but the pressure decreases, this design helps to reduce heat loss during the transmission process. The hot air flow can act more directly on the EPP plastic raw material, rather than forming unnecessary heat accumulation or loss in the drying drum 1.

[0025] A stirring rod 10 is connected between adjacent spiral conveying blades 6 and is arranged parallel to the drive shaft 5. This design increases the stirring surface area, allowing the stirring rod 10 to further stir the EPP plastic material while the spiral conveying blades 6 rotate. This dual stirring action helps to more evenly distribute the material within the drying drum 1, thereby enhancing the drying effect.

[0026] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An EPP plastic raw material drying device, characterized by: The invention comprises a drying cylinder (1), wherein a feed pipe (2) is provided above one end of the drying cylinder (1), a discharge pipe (3) is provided below the other end of the drying cylinder (1), a drive assembly is provided on the side of the end of the drying cylinder (1), a hot air blower (4) is provided on the side of the other end of the drying cylinder (1), a drive shaft (5) is provided for rotation inside the drying cylinder (1), a plurality of spiral conveying blades (6) are provided on the drive shaft (5), one end of the drive shaft (5) is connected to the drive assembly, and the other end of the drive shaft (5) extends through the drying cylinder (1) toward the hot air blower (4), the interior of the drying cylinder (1) is a hollow structure, and a plurality of first-level air outlet holes (7) are provided on the surface of the drying cylinder (1), an air outlet pipe (8) is provided above the drying cylinder (1), and a connecting pipe (9) is connected to one side of the hot air blower (4), and the connecting pipe (9) is rotatably connected to the drive shaft (5).

2. The EPP plastic raw material drying device according to claim 1, characterized in that: A stirring rod (10) is connected between adjacent spiral conveying blades (6), and the stirring rod (10) is arranged parallel to the driving shaft (5).

3. The EPP plastic raw material drying device according to claim 2, characterized in that: The surface of the primary air outlet (7) is connected to an air outlet column (11), and the surface of the air outlet column (11) is provided with a plurality of secondary air outlet holes (12), wherein the diameter of the secondary air outlet holes (12) is smaller than that of the primary air outlet holes (7).

4. The EPP plastic raw material drying device according to claim 3, characterized in that: The driving assembly comprises a driving motor (13), an output end of the driving motor (13) is connected to a first pulley (14), an end of the driving shaft (5) close to the driving motor (13) is connected to a second pulley (15), and a conveyor belt (16) is connected between the first pulley (14) and the second pulley (15).

5. The EPP plastic raw material drying device according to claim 4, characterized in that: A flip cover (17) is hingedly connected to the top of the discharge pipe (3), and a handle (18) is connected to the flip cover (17). A square opening seat (19) is provided in the middle of the discharge pipe (3), and a valve plug (20) is inserted into and removed from the square opening seat (19).

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