Rotary hot air dryer

Abstract

The utility model discloses a rotary hot air dryer which comprises a first drying cylinder and a second drying cylinder, flow guide shoveling plates are arranged in the first drying cylinder and the second drying cylinder, a connecting section is connected between the first drying cylinder and the second drying cylinder in a rotating and sealing mode through a bearing, and an exhaust device is arranged on the connecting section. An end cover is arranged at the end of the first drying cylinder, a feeding pipe and a hot air inlet pipe are arranged on the end cover, an end tail cover is arranged at the tail of the second drying cylinder, a cold air inlet pipe is arranged on the side edge of the end tail cover, and a discharging pipe is arranged at the bottom of the end tail cover. The drying device further comprises a supporting frame matched with the first drying cylinder and the second drying cylinder, a bearing seat is arranged on the supporting frame and arranged on the outer side of the first drying cylinder and the outer side of the second drying cylinder through bearings in a sleeving mode, and a rotation driving structure matched with the first drying cylinder and the second drying cylinder is arranged on the supporting frame. The drying effect of materials can be improved, and water vapor in airflow can be effectively separated from the materials.

Description

Technical Field

[0001] The utility model relates to the technical field of hot air dryers, and more specifically, to a rotary hot air dryer. Background Art

[0002] In the processing of grains, chemical products, etc., it is necessary to dry the materials to reduce the water content in the materials. The rotary dryer achieves material drying by rotating the materials, with good continuous operation and high efficiency.

[0003] When existing rotary dryers heat materials, most of them set a heating structure at the bottom of the rotary dryer to heat the internal materials. In this way, during the rotation and flipping process, the top is away from the heating structure, so it is easy to cool down during the flipping process. When it rotates to the bottom for heating again, the required heating time and energy consumption will become longer, affecting the heating efficiency of the material.

[0004] In addition, when the existing rotary dryer discharges the material after drying, the material has a high temperature, and the material cannot be cooled before being discharged, which may easily cause accidental injuries to the staff;

[0005] In addition, the existing rotary dryer is prone to carry part of the hot air flow with it when discharging the material, which affects the effect of separating the material from water vapor during the drying process and affects the drying performance of the material. Utility Model Content

[0006] 1. Technical issues to be resolved

[0007] In view of the problems existing in the prior art, the utility model provides a rotary hot air dryer to solve the technical problems mentioned in the background technology that the rotary dryer in the prior art has poor heating efficiency for materials during the material drying process, the temperature of the materials is high when they are discharged, and it is easy to carry some air flow containing water vapor, thereby affecting the drying effect of the materials.

[0008] (II) Technical solution

[0009] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0010] A rotary hot air dryer comprises a first drying cylinder and a second drying cylinder, wherein the first drying cylinder and the second drying cylinder are both provided with guide plates inside, a connecting section is connected between the first drying cylinder and the second drying cylinder via a bearing for rotation and sealing, an exhaust device is provided on the connecting section, an end cover is provided at the end of the first drying cylinder, a feed pipe and a hot air inlet pipe are provided on the end cover, an end tail cover is provided at the tail of the second drying cylinder, a cold air inlet pipe is provided on the side of the end tail cover, and a discharge pipe is provided at the bottom;

[0011] It also includes a support frame arranged to cooperate with the first drying cylinder and the second drying cylinder, the support frame is provided with a bearing seat, the bearing seat is respectively arranged on the outside of the first drying cylinder and the second drying cylinder through bearing sleeves, and the support frame is provided with a rotating drive structure to cooperate with the first drying cylinder and the second drying cylinder.

[0012] The utility model is further configured such that the rotation drive structure includes a toothed belt arranged on the first drying cylinder and the second drying cylinder, a first motor is arranged on the support frame, and a gear is arranged on the output end of the first motor meshing with the toothed belt. The rotation drive of the first drying cylinder and the second drying cylinder can be realized through the cooperation of the first motor, the toothed belt and the gear, thereby realizing the transportation of materials during the drying process.

[0013] The utility model is further configured such that a guide shaft is provided in the connecting section, a guide blade is provided on the guide shaft, the edge position of the guide blade is connected and fixed to the inner wall of the first drying cylinder or the second drying cylinder, and the conveying stability of the material at the connecting section can be improved through the cooperation of the guide shaft and the guide blade.

[0014] The utility model is further configured such that the exhaust device includes an exhaust pipe which is arranged on the connecting section and connected to the inner cavity of the connecting section, an interception filter is arranged at one end of the exhaust pipe close to the connecting section, and an exhaust fan is connected to the tail end of the exhaust pipe. The exhaust pipe, the fan and the interception filter cooperate to realize the discharge of the hot air flow in the first drying tube and the cold air flow in the second drying tube.

[0015] The utility model is further configured such that a feed control shaft is rotatably installed in the feed pipe through a bearing, and a feed control motor is provided for transmission connection with the feed control shaft, and feed control blades are provided on the feed control shaft to cooperate with the feed pipe, and the feed speed of the material in the feed pipe can be controlled by the cooperation of the feed control motor, the feed control shaft and the feed control blades.

[0016] The utility model is further configured that a feeding hopper is arranged on the top of the feeding pipe to improve the feeding convenience of the feeding pipe.

[0017] The utility model is further configured to further include a frame, and the frame is used for overall installation support.

[0018] The utility model is further configured that a dustproof filter is provided at the cold air inlet duct to enhance the air inlet protection at the cold air inlet duct.

[0019] (III) Beneficial effects

[0020] Compared with the prior art, the utility model provides a rotary hot air dryer, which has the following beneficial effects:

[0021] 1. The utility model provides a first drying cylinder and a second drying cylinder which are connected to each other, and a connecting section is connected between the first drying cylinder and the second drying cylinder through a bearing rotation seal, and an exhaust device is provided on the connecting section, so that the air flow flows inward from both sides, one side realizes the input of hot air through the hot air inlet pipe, thereby realizing the drying of the material, and the other side blows in cold air through the cold air inlet pipe, realizing the cooling of the material before discharge, and at the same time avoiding the situation that water vapor is discharged with the material, thereby improving the drying effect of the material.

[0022] 2. When the utility model is in use, the material is fed through the feed pipe, so that the material first enters the first drying cylinder, and the rotation of the first drying cylinder and the second drying cylinder is controlled by the rotation drive structure. The guide plates in the first drying cylinder and the second drying cylinder act downward, so that the material can be stably moved from the feed pipe to the discharge pipe, and the contact uniformity between the material and the hot air flow and the cold air flow can be improved during the turning process, thereby improving the drying effect of the material.

[0023] 3. The utility model is provided with a guide shaft in the connecting section, and a guide blade is provided on the guide shaft. The edge of the guide blade is connected and fixed to the inner wall of the first drying cylinder or the second drying cylinder. In this way, when the first drying cylinder and the second drying cylinder are rotating, the guide shaft and the guide blade can be driven to rotate inside the connecting section, thereby enhancing the conveying effect of the material from the first drying cylinder to the second drying cylinder at the connecting section, thereby ensuring the smoothness and stability of the material conveying. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The overall structure of a rotary hot air dryer in the utility model is shown in FIG. Figure 1 ;

[0025] Figure 2 The overall structure of a rotary hot air dryer in the utility model is shown in FIG. Figure 2 ;

[0026] Figure 3 It is a cross-sectional schematic diagram of the overall internal structure of the utility model;

[0027] Figure 4 This is a schematic diagram of the internal structure of the feed pipe in the utility model;

[0028] Figure 5 It is a schematic diagram of the connection structure between the exhaust duct and the dust filter in the utility model.

[0029] In the figure: 1. first drying cylinder; 2. second drying cylinder; 3. guide plate; 4. connecting section; 5. end cover; 6. feed pipe; 7. hot air inlet pipe; 8. end cover; 9. cold air inlet pipe; 10. discharge pipe; 11. support frame; 12. bearing seat; 13. toothed belt; 14. first motor; 15. gear; 16. guide shaft; 17. guide blade; 18. exhaust pipe; 19. interception filter; 20. exhaust fan; 21. feed control shaft; 22. feed control motor; 23. feed control blade; 24. feed hopper; 25. frame; 26. dust filter. DETAILED DESCRIPTION

[0030] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0031] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0032] In the present invention, unless otherwise specified, directions such as "up" and "down" are usually used in reference to the directions shown in the drawings, or in reference to the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "left" and "right" are usually used in reference to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0033] See also Figure 1-5 , a rotary hot air dryer, comprising a first drying cylinder 1 and a second drying cylinder 2, wherein the first drying cylinder 1 and the second drying cylinder 2 are both provided with a guide plate 3, a connecting section 4 is connected between the first drying cylinder 1 and the second drying cylinder 2 through a bearing rotation seal, an exhaust device is provided on the connecting section 4, an end cover 5 is provided at the end of the first drying cylinder 1, wherein the end cover 5 is rotationally connected to the first drying cylinder 1 through a bearing seal, a feed pipe 6 and a hot air inlet pipe 7 are provided on the end cover 5, wherein the hot air inlet pipe 7 is connected to an external hot air source, an end tail cover 8 is provided at the tail of the second drying cylinder 2, wherein the end tail cover 8 is rotationally connected to the second drying pipe through a bearing, a cold air inlet pipe 9 is provided on the side of the end tail cover 8, and a discharge pipe 10 is provided at the bottom, wherein the cold air inlet pipe 9 is connected to an external cold air source, and the cold air source can be a natural cold air source or a cold air source after cooling through a certain process;

[0034] It also includes a support frame 11 that is arranged to cooperate with the first drying cylinder 1 and the second drying cylinder 2. A bearing seat 12 is arranged on the support frame 11. The bearing seat 12 is respectively arranged on the outside of the first drying cylinder 1 and the second drying cylinder 2 through bearing sleeves. A rotating drive structure is arranged on the support frame 11 to cooperate with the first drying cylinder 1 and the second drying cylinder 2.

[0035] In this embodiment, a first drying cylinder 1 and a second drying cylinder 2 are connected to each other, and a connecting section 4 is connected between the first drying cylinder 1 and the second drying cylinder 2 through a bearing rotation seal, and an exhaust device is provided on the connecting section 4. In this way, the air flow flows inward from both sides, and hot air is input through the hot air inlet pipe 7 on one side to achieve material drying, while cold air is blown in through the cold air inlet pipe 9 on the other side to achieve cooling of the material before discharge, while avoiding the situation where water vapor is discharged with the material, thereby improving the drying effect of the material.

[0036] More specifically, when the utility model is in use, the material is fed through the feed pipe 6, so that the material first enters the first drying cylinder 1, and the rotation of the first drying cylinder 1 and the second drying cylinder 2 is controlled by the rotation drive structure. The guide plate 3 in the first drying cylinder 1 and the second drying cylinder 2 acts downward, so that the material can be stably moved from the feed pipe 6 to the discharge pipe, and in the process of turning over, the contact uniformity between the material and the hot air flow and the cold air flow can be improved, thereby improving the drying effect of the material.

[0037] See also Figure 1 and Figure 2 As an implementation of the rotation drive structure: the rotation drive structure includes a toothed belt 13 arranged on the first drying cylinder 1 and the second drying cylinder 2, a first motor 14 is arranged on the support frame 11, and a gear 15 is arranged on the output end of the first motor 14 meshing with the toothed belt 13.

[0038] Specifically, the first motor 14 is started, and the gear 15 can be controlled to rotate by the first motor 14 . The gear 15 is meshed with the toothed belt 13 , and the toothed belt 13 can be controlled to drive the corresponding first drying cylinder 1 and second drying cylinder 2 to rotate.

[0039] See also Figure 3 As an implementation of the connecting section 4 , a guide shaft 16 is provided in the connecting section 4 , a guide blade 17 is provided on the guide shaft 16 , and the edge position of the guide blade 17 is connected and fixed to the inner wall of the first drying cylinder 1 or the second drying cylinder 2 .

[0040] Specifically, when the first drying cylinder 1 and the second drying cylinder 2 are rotating, the guide shaft 16 and the guide blades 17 can be driven to rotate inside the connecting section 4, thereby enhancing the conveying effect of the material from the first drying cylinder 1 to the second drying cylinder 2 at the connecting section 4, thereby ensuring the smoothness and stability of the material conveying.

[0041] See also Figure 2 and Figure 5 As an implementation of the exhaust device: the exhaust device includes an exhaust pipe 18 arranged on the connecting section 4 and connected to the inner cavity of the connecting section 4, an interception filter 19 is arranged at one end of the exhaust pipe 18 close to the connecting section 4, and an exhaust fan 20 is connected to the tail of the exhaust pipe 18.

[0042] Specifically, the exhaust fan 20 is started, and under the action of the exhaust fan 20, a negative pressure can be generated at one end of the exhaust duct connected to the connecting section 4, so that the airflow in the connecting section 4, the first drying cylinder 1 and the second drying cylinder 2 can be extracted, so that the cold airflow and the hot airflow are gathered at the exhaust duct and discharged outwardly.

[0043] See also Figure 4 As an implementation method of the feed pipe 6: a feed control shaft 21 is rotatably installed in the feed pipe 6 through a bearing, and a feed control motor 22 is provided in transmission connection with the feed control shaft 21, and a feed control blade 23 is provided on the feed control shaft 21 to cooperate with the feed pipe 6.

[0044] Specifically, the feed control motor 22 is started, and the feed control shaft 21 can be controlled to rotate through the feed control motor 22 , and the feed control blade 23 can be controlled to rotate through the feed control shaft 21 , thereby achieving control of the feed speed of the material in the feed pipe 6 .

[0045] See also Figure 1 and Figure 2 As an implementation of the feed pipe 6 : a feed hopper 24 is provided at the top of the feed pipe 6 .

[0046] Specifically, temporary storage of the material entering the feed pipe 6 is achieved, thereby improving the feeding convenience of the feed pipe 6 .

[0047] See also Figure 1 and Figure 2 As an implementation of the rotating hot air desiccant: it also includes a frame 25, and the frame 25 is used for overall installation support.

[0048] See also Figure 5 As an implementation of the cold air inlet pipe 9: a dust filter 26 is provided at the cold air inlet pipe 9.

[0049] Specifically, the dustproof filter 26 can enhance the cleanliness of the cold air flow when it enters the second drying box.

[0050] In summary, when the overall equipment is in use:

[0051] The dried material is placed in the feed hopper 24 and falls into the feed pipe 6, and the feed control motor 22 is started. The feed control shaft 21 can be controlled to rotate by the feed control motor 22, and the feed control blade 23 can be controlled to rotate by the feed control shaft 21, so that the material in the feed pipe 6 evenly enters the first drying cylinder 1;

[0052] At the same time, the external hot air source is transported to the inside of the first drying box through the hot air inlet pipe 7, and the cold air source is transported to the inside of the second drying cylinder 2 through the cold air inlet pipe 9;

[0053] In this process, the first motor 14 is started, and the gear 15 can be controlled to rotate by the first motor 14. The gear 15 and the toothed belt 13 are engaged to control the toothed belt 13 to drive the corresponding first drying cylinder 1 and the second drying cylinder 2 to rotate. In this process, the cooperation of the support frame 11 and the bearing seat 12 can realize the stable support of the first drying cylinder 1 and the second drying cylinder 2 during rotation.

[0054] During this process, the material will be rotated and transported in the first drying cylinder 1 under the action of the guide plate 3 inside the first drying cylinder 1. During this process, the material will be turned back and forth, thereby improving the contact uniformity between the material and the hot air, thereby improving the drying effect of the material in the first drying cylinder 1;

[0055] After that, the material reaches the connecting section 4, and the guide shaft and the guide vane at the connecting section 4 cooperate to stably transfer the material in the first drying cylinder 1 to the second drying cylinder 2, and the second drying cylinder 2 is turned over, so that the material can be transported to the position of the discharge pipe 10 and discharged outward through the discharge pipe 10;

[0056] During this process, under the action of the exhaust fan 20, a negative pressure will be generated at the end close to the exhaust pipe and the connecting pipe, so that the hot air flow and the cold air flow will converge at the connecting section 4 and be discharged outward through the exhaust pipe. In this way, it can be avoided that the hot air flow is discharged along with the material, and the water vapor in the hot air flow is fully separated from the material. Moreover, through the circulation of the cold air flow in the second drying cylinder 2, the material after hot air drying can be cooled down, thereby reducing the temperature of the material when it is discharged.

[0057] In all the schemes mentioned above, the connection between two parts can be selected according to actual conditions by welding, bolt and nut matching connection, bolt or screw connection or other well-known connection methods, which are not described here one by one. In the above, all fixed connections are preferably welded. Although the embodiments of the utility model have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the utility model. The scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. A rotary hot air dryer, comprising a first drying cylinder (1) and a second drying cylinder (2), characterized in that: The first drying cylinder (1) and the second drying cylinder (2) are both provided with a guide plate (3) inside, the first drying cylinder (1) and the second drying cylinder (2) are rotatably sealed with a connecting section (4) between them via a bearing, an exhaust device is provided on the connecting section (4), an end cover (5) is provided at the end of the first drying cylinder (1), a feed pipe (6) and a hot air inlet pipe (7) are provided on the end cover (5), the tail of the second drying cylinder (2) is provided with an end cover (8), a cold air inlet pipe (9) is provided on the side of the end cover (8), and a discharge pipe (10) is provided at the bottom; The invention also comprises a support frame (11) arranged in cooperation with the first drying cylinder (1) and the second drying cylinder (2); a bearing seat (12) is arranged on the support frame (11); the bearing seat (12) is respectively arranged on the outside of the first drying cylinder (1) and the second drying cylinder (2) through bearing sleeves; and a rotation driving structure is arranged on the support frame (11) in cooperation with the first drying cylinder (1) and the second drying cylinder (2).

2. A rotary hot air dryer according to claim 1, characterized in that: The rotary drive structure comprises a toothed belt (13) arranged on a first drying cylinder (1) and a second drying cylinder (2); a first motor (14) is arranged on the support frame (11); and a gear (15) is arranged at the output end of the first motor (14) that meshes with the toothed belt (13).

3. A rotary hot air dryer according to claim 1, characterized in that: A guide shaft (16) is arranged in the connecting section (4), and a guide blade (17) is arranged on the guide shaft (16). The edge of the guide blade (17) is connected and fixed to the inner wall of the first drying cylinder (1) or the second drying cylinder (2).

4. A rotary hot air dryer according to claim 3, characterized in that: The exhaust device comprises an exhaust pipe (18) arranged on the connecting section (4) and connected to the inner cavity of the connecting section (4); an interception filter (19) is arranged at one end of the exhaust pipe (18) close to the connecting section (4); and an exhaust fan (20) is connected to the tail end of the exhaust pipe (18).

5. A rotary hot air dryer according to any one of claims 1 to 4, characterized in that: A feed control shaft (21) is rotatably mounted in the feed pipe (6) via a bearing, and a feed control motor (22) is provided in transmission connection with the feed control shaft (21). A feed control blade (23) is provided on the feed control shaft (21) in coordination with the feed pipe (6).

6. A rotary hot air dryer according to claim 5, characterized in that: A feeding hopper (24) is provided at the top of the feeding pipe (6).

7. A rotary hot air dryer according to claim 1, characterized in that: It also comprises a frame (25), and the frame (25) is used for overall installation support.

8. A rotary hot air dryer according to claim 1, characterized in that: The cold air inlet pipe (9) is provided with a dustproof filter (26).

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