Internal circulation roller drying device

Abstract

The utility model discloses an internal circulation drum drying device which comprises a rack and a drying drum, the drying drum is rotationally installed on the rack and is a conical drum, an air inlet is formed in the narrow-diameter end of the drying drum, and an air outlet is formed in the wide-diameter end of the drying drum. A plurality of evenly-distributed shoveling plates are fixed to the inner wall of the wide-diameter end of the drying roller in the radial direction. A guide conical cylinder is fixed in the drying roller, and a plurality of evenly-distributed guide plates are fixed to the guide conical cylinder. By arranging the conical drying roller, materials in the drying roller can slide downwards from the narrow-diameter end of the drying roller to the wide-diameter end of the drying roller, the shoveling plate shovels the materials and guides the materials to the guide conical roller, and the materials move towards the narrow-diameter side of the drying roller on the guide conical roller and finally fall to the narrow-diameter end of the drying roller. Therefore, materials circularly flow in the drying roller, the material fluidity is improved, and the material drying effect and drying efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of drying equipment, in particular to an internal circulation drum drying device. Background Art

[0002] In industries such as plastic processing and food processing, raw materials, semi-finished products or products generally exist in the form of particulate matter, such as plastic masterbatch in plastic processing, beans, feeds, etc. in the food processing industry. These particulate matters themselves have a certain water content, or will absorb a certain amount of moisture after being placed for a period of time, and the presence of moisture will affect the subsequent product processing or the quality of the final product. Therefore, drying the above-mentioned particulate matters is often a necessary operation in the processing process.

[0003] In the prior art, the above-mentioned particulate matters can be dried by a drum drying device, and the particulate matters are dried by means of an external heating element or direct blowing of hot air, etc.; the granular materials will accumulate in the middle and lower space inside the drum drying device under the action of gravity, the fluidity of the particulate matters in the drum drying device is poor, and the upper and middle space inside the drum drying device cannot be fully utilized. Due to the limited internal space of the drum drying device, when there are more granular materials, the materials will be tightly squeezed, which is likely to cause poor air circulation between the materials, reducing the drying efficiency and drying effect. Summary of the Utility Model

[0004] Based on this, it is necessary to provide an internal circulation drum drying device for the above technical problems.

[0005] In order to achieve the above object, the utility model provides an internal circulation drum drying device, which includes a frame and a drying drum. The drying drum is rotatably installed on the frame. The drying drum is a conical cylinder. An air inlet is provided at the narrow-diameter end of the drying drum, and an air outlet is provided at the wide-diameter end of the drying drum. The air inlet and the air outlet are coaxially arranged with the drying drum. A plurality of uniformly distributed lifters are radially fixed on the inner wall at the wide-diameter end of the drying drum; a guiding conical cylinder is fixed inside the drying drum. The narrow-diameter end of the guiding conical cylinder faces the same direction as the narrow-diameter end of the drying drum. A plurality of uniformly distributed guiding plates are fixed on the guiding conical cylinder. The ends of the guiding conical cylinder and the guiding plates facing the wide-diameter end of the drying drum are both located inside the area surrounded by each lifter; discharge ports are provided between adjacent lifters at the wide-diameter end of the drying drum. A baffle for opening and closing the discharge port is movably installed at the discharge port. A radiation frame is installed in the air outlet. An opening for the radiation frame to move is radially provided in the air outlet. The radiation frame passes through the opening and is fixedly connected to the baffle. The radiation frame is in a radial shape, which is convenient for connecting each baffle.

[0006] Preferably, a nut is fixed in the air outlet, and a screw rod is threadedly connected to the nut. The screw rod is rotatably connected to the radiation frame through a first bearing.

[0007] Preferably, a driving motor is installed on the frame. A driving gear is installed at the output end of the driving motor. A transmission shaft is rotatably installed on the frame. A transmission gear is installed on the transmission shaft. The driving gear is meshed and connected with the transmission gear. A driven gear is installed on the air inlet. The driven gear is meshed and connected with the transmission gear.

[0008] Preferably, a hot air blower is movably placed on the frame. A hot air duct is installed at the output end of the hot air blower. The output end of the hot air duct can be inserted into the air inlet.

[0009] Preferably, a second bearing is fixed on the frame. The outer ring of the second bearing is fixedly connected with the frame. The inner ring of the second bearing is fixedly connected with the air inlet. Two symmetrically arranged idler wheel seats are fixed on the frame. An idler wheel is rotatably installed on the idler wheel seat. An annular guide rail is fixed on the outer wall of the drying drum. The idler wheel is in rolling connection with the lower part of the annular guide rail.

[0010] Preferably, a blanking cover is fixed on the frame. The blanking cover is sleeved on the air outlet. The blanking cover covers one wide-diameter end of the drying drum. A baffle is movable inside the blanking cover. A blanking port is arranged at the bottom of the blanking cover.

[0011] Preferably, the guiding conical cylinder is a net cylinder structure. One wide-diameter end of the guiding conical cylinder is fixedly connected with the inner wall of one wide-diameter end of the drying drum. The air outlet is located inside the guiding conical cylinder.

[0012] The beneficial effects of the technical solution: By arranging the drying drum in a conical shape, under the action of gravity and the rotation of the drying drum, the materials in the drying drum will slide down from its narrow-diameter end to its wide-diameter end. The plowshare will scoop up the materials and guide them to the guiding conical cylinder. The materials move towards the narrow-diameter side of the drying drum on the guiding conical cylinder and finally fall to the narrow-diameter end of the drying drum, so as to realize the internal circulation flow of the materials inside the drying drum, improve the fluidity of the materials, and improve the drying effect and drying efficiency of the materials. Since there are flowing materials in the middle and lower parts of the drying drum and the upper part of the guiding conical cylinder, the space utilization rate of the inner cavity of the drying drum can be improved, and the maximum feeding amount can be increased. Description of the Drawings

[0013] Figure 1 is a schematic structural diagram of an internal circulation drum drying device according to an embodiment;

[0014] Figure 2 is Figure 1 a sectional view taken along line A-A in

[0015] Figure 3 is Figure 1 a sectional view taken along line B-B in

[0016] Figure 4 is Figure 1 a partial enlarged view at C in

[0017] Figure 5 Partial schematic view of an internal circulation drum drying device of an embodiment when the opening is open;

[0018] In the figure, 1 is the frame; 2 is the drying drum; 3 is the air inlet; 4 is the air outlet; 5 is the lifter; 6 is the guiding cone; 7 is the guiding plate; 8 is the discharge port; 9 is the baffle; 10 is the radiation rack; 11 is the opening; 12 is the nut; 13 is the screw; 14 is the first bearing; 15 is the driving motor; 16 is the driving gear; 17 is the transmission shaft; 18 is the transmission gear; 19 is the driven gear; 20 is the hot air blower; 21 is the hot air duct; 22 is the second bearing; 23 is the supporting wheel seat; 24 is the supporting wheel; 25 is the annular guide rail; 26 is the blanking cover; 27 is the blanking port. Specific embodiments

[0019] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0020] Please refer to Figures 1 to 5 , an embodiment of the present application provides an internal circulation drum drying device, including a frame 1 and a drying drum 2. The drying drum 2 is rotatably installed on the frame 1. The drying drum 2 is a conical cylinder. An air inlet 3 is provided at the narrow-diameter end of the drying drum 2, and an air outlet 4 is provided at the wide-diameter end of the drying drum 2. The air inlet 3 and the air outlet 4 are coaxially arranged with the drying drum 2;

[0021] A plurality of uniformly distributed lifters 5 are radially fixed on the inner wall at the wide-diameter end of the drying drum 2; a guiding cone 6 is fixed inside the drying drum 2. The narrow-diameter end of the guiding cone 6 faces the same direction as the narrow-diameter end of the drying drum 2. A plurality of uniformly distributed guiding plates 7 are fixed on the guiding cone 6. The narrow-diameter end of the guiding cone 6 and the guiding plates 7 are located inside the area surrounded by each lifter 5 towards the wide-diameter end of the drying drum 2. In this way, the materials lifted by the lifters 5 will fall on the guiding cone 6 and the guiding plates 7 when they fall; discharge ports 8 are provided between adjacent lifters 5 at the wide-diameter end of the drying drum 2. A baffle 9 for opening and closing the discharge port 8 is movably installed at the discharge port 8. A radiation rack 10 is installed in the air outlet 4. An opening 11 for the radiation rack 10 to move is radially opened in the air outlet 4. The radiation rack 10 passes through the opening 11 and is fixed to the baffle 9.

[0022] Granular materials to be dried are added into the drying drum 2 through the air inlet 3, and then hot air is introduced into the air outlet 4. After the hot air contacts the materials for drying, it is discharged from the air outlet 4. The drying drum 2 is controlled to rotate. Since the drying drum 2 is a conical cylinder, the materials in the drying drum 2 will slide down from its narrow-diameter end to its wide-diameter end. The lifter 5 then scoops up the materials. When the lifter 5 rotates to the upper part of the drying drum 2, it will guide the materials onto the guiding conical cylinder 6. The guiding plate 7 restricts the materials from directly sliding circumferentially, causing the materials to slide along the length direction of the guiding conical cylinder 6 on the guiding conical cylinder 6. The materials move towards the narrow-diameter side of the drying drum 2 on the guiding conical cylinder 6. When the guiding plate 7 rotates downward, it no longer blocks the materials. At this time, the materials also move to the narrow-diameter end of the guiding conical cylinder 6. The materials fall from the guiding conical cylinder 6 to the narrow-diameter end of the drying drum 2, and then slide down from the narrow-diameter end of the drying drum 2 to its wide-diameter end, thus realizing the internal circulation flow of the materials in the drying drum 2, improving the fluidity of the materials, and enhancing the drying effect and drying efficiency of the materials. Since there are flowing materials in the middle and lower parts of the drying drum 2 and the upper part of the guiding conical cylinder 6, the space utilization rate of the inner cavity of the drying drum 2 can be improved, and the maximum feeding amount can be increased.

[0023] After drying is completed, the radiation frame 10 is controlled to move, thereby driving each baffle 9 to move, so that the discharge port 8 is opened, and the materials can be discharged from the discharge port 8.

[0024] Please refer to Figures 1 to 5 In a preferred embodiment, to facilitate driving the radiation frame 10 to move and ensure that the radiation frame 10 can maintain a fixed position after moving, a nut 12 is fixed in the air outlet 4. The nut 12 is threadedly connected with a screw rod 13. The screw rod 13 is rotatably connected to the radiation frame 10 through a first bearing 14. By rotating the screw rod 13, under the action of the nut 12, the screw rod 13 will rotate deeper into or away from the air outlet 4. By setting the first bearing 14 to connect the radiation frame 10 and using the opening 11 to limit the rotation of the radiation frame 10, the screw rod 13 can drive the radiation frame 10 to move linearly, thereby driving each baffle 9 to move and opening and closing the discharge port 8.

[0025] Please refer to Figure 1 and Figure 2 In a preferred embodiment, to facilitate driving the drying drum 2 to rotate, a driving motor 15 is installed on the machine frame 1. The output end of the driving motor 15 is installed with a driving gear 16. A transmission shaft 17 is rotatably installed on the machine frame 1. A transmission gear 18 is installed on the transmission shaft 17. The driving gear 16 is meshed with the transmission gear 18. A driven gear 19 is installed on the air inlet 3. The driven gear 19 is meshed with the transmission gear 18. The driving motor 15 drives the transmission gear 18 and the transmission shaft 17 to rotate through the driving gear 16, and the transmission gear 18 drives the driven gear 19, the air inlet 3, and the drying drum 2 to rotate.

[0026] Please refer to Figure 1 and Figure 2 In a preferred embodiment, to facilitate the introduction of hot air into the air inlet 3, a hot air blower 20 is movably placed on the frame 1. The output end of the hot air blower 20 is equipped with a hot air duct 21. The hot air duct 21 is a rigid pipe, and the output end of the hot air duct 21 can be inserted into the air inlet 3. The hot air blower 20 is placed on the frame 1 for easy movement. When adding materials into the drying drum 2, the hot air blower 20 can be removed to avoid the hot air duct 21 blocking the air inlet 3.

[0027] Please refer to Figures 1 to 3 In a preferred embodiment, to facilitate the rotational installation of the drying drum 2 on the frame 1, a second bearing 22 is fixed on the frame 1. The outer ring of the second bearing 22 is fixedly connected to the frame 1, and the inner ring of the second bearing 22 is fixedly connected to the air inlet 3. Two symmetrically arranged idler wheel seats 23 are fixed on the frame 1. An idler wheel 24 is rotatably installed on the idler wheel seat 23. An annular guide rail 25 is fixed on the outer wall of the drying drum 2, and the idler wheel 24 is in rolling connection with the lower part of the annular guide rail 25. The drying drum 2 is supported by the second bearing 22 and the idler wheel 24, enabling the drying drum 2 to be rotatably installed on the frame 1. When the drying drum 2 rotates, it drives the annular guide rail 25 to rotate. The contact between the idler wheel 24 and the annular guide rail 25 can stably support the drying drum 2, enabling the drying drum 2 to rotate stably.

[0028] Please refer to Figures 1 to 5 In a preferred embodiment, to prevent the materials at the discharge port 8 from being scattered and thrown out, making it inconvenient to collect the materials, a blanking cover 26 is fixed on the frame 1. The blanking cover 26 is sleeved on the exhaust port 4. The blanking cover 26 covers the wide-diameter end of the drying drum 2. A baffle 9 is movable within the blanking cover 26, and a blanking port 27 is provided at the bottom of the blanking cover 26. The materials thrown out from each discharge port 8 will enter the blanking cover 26 without being scattered outward. The materials will accumulate in the blanking cover 26 and be discharged from the bottom blanking port 27, facilitating the fixed-point collection of the materials.

[0029] Please refer to Figures 1 to 5 In a preferred embodiment, to improve the fluidity of hot air and enhance the drying effect on the materials, the guiding conical cylinder 6 is set as a net cylinder structure for easy ventilation. The wide-diameter end of the guiding conical cylinder 6 is fixedly connected to the inner wall of the wide-diameter end of the drying drum 2, and the exhaust port 4 is located inside the guiding conical cylinder 6. The hot air entering from the air inlet 3 passes through the guiding conical cylinder 6 and is discharged from the exhaust port 4. When the materials move on the guiding conical cylinder 6, they can fully contact the flowing hot air, improving the drying effect on the materials.

[0030] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity in description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0031] The above embodiments only illustrate several implementation manners of the present utility model, and the description thereof is relatively specific and detailed. However, it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the present utility model patent shall be subject to the appended claims.

[0032] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present utility model.

[0033] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0034] In the present utility model, unless otherwise clearly specified and defined, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

Claims

1. An internal circulation drum drying device, comprising a frame (1) and a drying drum (2), wherein the drying drum (2) is rotatably mounted on the frame (1), characterized in that: The drying drum (2) is a conical drum, an air inlet (3) is provided at the narrow end of the drying drum (2), an air outlet (4) is provided at the wide end of the drying drum (2), the air inlet (3) and the air outlet (4) are coaxially arranged with the drying drum (2), and a plurality of uniformly distributed lifting plates (5) are radially fixed on the inner wall of the wide end of the drying drum (2); a guide cone (6) is fixed inside the drying drum (2), the narrow end of the guide cone (6) is oriented in the same direction as the narrow end of the drying drum (2), and a plurality of uniformly distributed guide plates (7) are fixed on the guide cone (6). ), the ends of the guide cone (6) and the guide plate (7) facing the wide diameter of the drying drum (2) are both located inside the area surrounded by each copying plate (5); a discharge port (8) is provided at one end of the wide diameter of the drying drum (2) and between two adjacent copying plates (5); a baffle (9) is movably installed at the discharge port (8) and can open and close the discharge port (8); a radiation frame (10) is installed in the exhaust port (4); an opening (11) for the radiation frame (10) to move is radially opened in the exhaust port (4); the radiation frame (10) passes through the opening (11) and is fixedly connected to the baffle (9).

2. The inner circulation drum drying device according to claim 1, characterized in that: A nut (12) is fixed inside the air outlet (4), the nut (12) is threadedly connected to a screw rod (13), and the screw rod (13) is rotatably connected to the radiation frame (10) via a first bearing (14).

3. The inner circulation drum drying device according to claim 1, characterized in that: A driving motor (15) is mounted on the frame (1), a driving gear (16) is mounted on the output end of the driving motor (15), a transmission shaft (17) is rotatably mounted on the frame (1), a transmission gear (18) is mounted on the transmission shaft (17), the driving gear (16) is meshingly connected with the transmission gear (18), and a driven gear (19) is mounted on the air inlet (3), the driven gear (19) is meshingly connected with the transmission gear (18).

4. The internal circulation drum drying device according to claim 1, characterized in that: A hot air blower (20) is movably placed on the frame (1), a hot air pipe (21) is installed at the output end of the hot air blower (20), and the output end of the hot air pipe (21) can be inserted into the air inlet (3).

5. The internal circulation drum drying device according to claim 1, characterized in that: A second bearing (22) is fixed on the frame (1), the outer ring of the second bearing (22) is fixedly connected to the frame (1), and the inner ring of the second bearing (22) is fixedly connected to the air inlet (3); two symmetrically arranged supporting wheel seats (23) are fixed on the frame (1), supporting wheels (24) are rotatably mounted on the supporting wheel seats (23), an annular guide rail (25) is fixed on the outer wall of the drying drum (2), and the supporting wheel (24) is rollingly connected to the lower part of the annular guide rail (25).

6. The internal circulation drum drying device according to claim 1, characterized in that: A material discharge cover (26) is fixed on the frame (1), the material discharge cover (26) is sleeved on the exhaust port (4), the material discharge cover (26) covers the wide end of the drying drum (2), the baffle (9) moves in the material discharge cover (26), and a material discharge port (27) is provided at the bottom of the material discharge cover (26).

7. The internal circulation drum drying device according to claim 1, characterized in that: The guide cone (6) is a mesh cylinder structure, the wide end of the guide cone (6) is fixedly connected to the inner wall of the wide end of the drying drum (2), and the exhaust port (4) is located on the inner side of the guide cone (6).

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