Double-barrel rotary drying machine

Abstract

The utility model relates to the technical field of compound fertilizer production and processing, and discloses a double-barrel rotary drying machine which comprises a support, a barrel rotationally arranged on the support, an inner barrel and an outer barrel arranged in the barrel, and an auxiliary structure movably arranged in the barrel and comprising a material pushing paddle and a fixing rod, the material pushing paddle is rotationally connected with the fixing rod, and the fixing rod is connected with the inner barrel. The fixed rod is fixedly arranged in the inner cylinder; the heat control structure is movably arranged at one end of the cylinder body, the heat control structure comprises a fan, a heat dissipation groove and a spiral heating pipe, the fan is rotationally arranged in the heat dissipation groove, the heat dissipation groove is formed in one end of the cylinder body, and the spiral heating pipe is arranged in the cylinder body in a surrounding mode. The heat near the spiral heating pipe is partially dissipated, only the heat conducted on the wall surface is reserved, and the internal redundant heat is dissipated, so that the abrasion caused by overheating of the outer side of the barrel body is avoided, and the service life of the device is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to compound fertilizer production and processing technical field, concretely relates to a double cylinder rotary dryer. BACKGROUND

[0002] Double cylinder rotary dryer, usually simply referred to as double cylinder dryer, is a direct rotary drying equipment, and composite fertilizer needs certain drying treatment in the production process to ensure its quality stability, and double cylinder rotary dryer can quickly dry wet material to the required moisture content due to its high drying capacity.

[0003] The prior art discloses a double cylinder feed dryer (CN105486068A), which comprises a base, an outer drying cylinder body, an inner drying cylinder body arranged in the outer drying cylinder body and a driving device for driving the inner drying cylinder body to rotate; the outer drying cylinder body is provided with a feeding port at the left end, and the outer drying cylinder body comprises three layers of an outer heat preservation layer, a middle first heating layer and an inner working cavity; the inner drying cylinder body is rotatably connected with the outer drying cylinder body, and the left end of the inner drying cylinder body is provided with a discharging port extending out of the left end of the outer drying cylinder body; the inner drying cylinder body comprises a second heating layer at the outer layer and a feeding channel at the inner layer; the outer part and the inner part of the inner drying cylinder body are respectively fixed with first spiral blades and second spiral blades with opposite rotation directions; an opening is formed in the right end side wall of the inner drying cylinder body, and a material scraping shovel is arranged beside the opening.

[0004] Through the search, it is found that the prior art does not set up the relative auxiliary measures in the feeding channel of the inner and outer cylinders when in use, which leads to the uneven drying of the material, thereby affecting the use of the material, and furthermore, the heating conduction required for drying has a high influence on the temperature conduction of the cylinder body, and the device adopts a closed environment without ventilation measures, which leads to the easy overheating of the device by heat conduction and causes certain abrasion, thereby being not conducive to the long-term use of the device.

[0005] Therefore, the utility model is provided. UTILITY MODEL CONTENT

[0006] In order to solve the above-mentioned technical problems of uneven drying and easy damage caused by conduction overheating, the basic concept of the technical scheme of the utility model is as follows:

[0007] A double cylinder rotary dryer comprises

[0008] A support is fixedly placed on the ground, a cylinder body is rotatably arranged on the support, and an inner cylinder and an outer cylinder are arranged in the cylinder body;

[0009] An auxiliary structure is movably arranged in the cylinder body, the auxiliary structure comprises a material pushing paddle and a fixed rod, the material pushing paddle is rotatably connected with the fixed rod, and the fixed rod is fixedly arranged in the inner cylinder.

[0010] The heat control structure is movably arranged at one end of the barrel, and comprises a fan, a heat dissipation groove and a spiral heating pipe.

[0011] As a preferred embodiment of the utility model, the support is of L-shaped structure, and a support plate is fixedly arranged on the top surface of the support.

[0012] As a preferred embodiment of the utility model, a gear ring is fixedly connected to the curved surface of the barrel, a motor is fixedly installed above the support, a gear is connected to the output end of the motor, and the gear meshes with the gear ring.

[0013] As a preferred embodiment of the utility model, an inner heating cavity is arranged between the inner barrel and the outer barrel, the spiral heating pipe is provided in two different sizes, the small spiral heating pipe is arranged around the inner heating cavity, an outer heating cavity is arranged between the barrel and the outer barrel, and the large spiral heating pipe is arranged around the outer heating cavity.

[0014] As a preferred embodiment of the utility model, a circular-truncated-cone-shaped return pipe is arranged between the outer barrel and the inner barrel, and an L-shaped feeding pipe is arranged at one end of the outer barrel.

[0015] As a preferred embodiment of the utility model, a return spiral is fixedly arranged on the inner wall surface of the inner barrel, a feeding spiral is fixedly arranged on the inner wall surface of the outer barrel, the return spiral and the feeding spiral are in opposite directions, a fixed rod is fixedly connected to the inner barrel, three pushing paddles are fixedly connected to the curved surface of the fixed rod through bearings, and the blades of the pushing paddles are arc-shaped plates.

[0016] As a preferred embodiment of the utility model, the diameter of the heat dissipation groove corresponds to the outer barrel, heat dissipation perforations are arranged between the heat dissipation groove and the inner heating cavity, and heat dissipation through-holes are arranged between the heat dissipation groove and the outer heating cavity.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] 1. By arranging the auxiliary structure and the spiral heating pipe, the two spiral heating pipes of different sizes are arranged around the outer wall surfaces of the inner barrel and the outer barrel, the material is pushed onto the inner barrel to form hot air by the rotatable pushing paddles and the arc-shaped blades of special shape, and the material is uniformly heated by the surrounding heating of the spiral heating pipe, so that the drying is more uniform.

[0019] 2. By setting up a heat control structure and using heat dissipation slots and fans in combination, some of the heat near the spiral heating tube is dissipated, leaving only the heat conducted to the wall surface, while the excess heat inside is dissipated. This avoids wear caused by overheating on the outside of the cylinder, thereby extending the service life of the device.

[0020] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0021] In the attached diagram:

[0022] Figure 1 This is a schematic diagram of the overall design of this utility model;

[0023] Figure 2 This is a side view of the present invention;

[0024] Figure 3 This is a structural disassembly diagram of the present invention;

[0025] Figure 4 This is a cross-sectional schematic diagram of the present invention;

[0026] Figure 5 This is a disassembly diagram of the auxiliary structure of this utility model.

[0027] In the diagram: 10. Cylinder; 11. Support; 12. Motor; 13. Gear; 14. Gear ring; 15. Support plate; 16. Fan; 17. Heat dissipation perforation; 18. Heat dissipation groove; 19. Inner cylinder; 20. Outer cylinder; 21. External heating chamber; 22. Internal heating chamber; 23. Spiral heating tube; 24. Heat dissipation through hole; 25. Return port; 26. Feed pipe; 27. Return screw; 28. Feeding screw; 29. ​​Pusher paddle; 30. Fixing rod. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model.

[0029] A double-cylinder rotary dryer, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the system includes a support 11, which is fixedly placed on the ground. A cylinder 10 is rotatably mounted on the support 11, and an inner cylinder 19 and an outer cylinder 20 are disposed inside the cylinder 10. An auxiliary structure is movably disposed inside the cylinder 10 and includes a pusher 29 and a fixing rod 30. The pusher 29 is rotatably connected to the fixing rod 30, and the fixing rod 30 is fixedly disposed inside the inner cylinder 19. A heat control structure is movably disposed at one end of the cylinder 10 and includes a fan 16, a heat dissipation groove 18, and a spiral heating tube 23. The fan 16 is rotatably disposed inside the heat dissipation groove 18, which is located at one end of the cylinder 10. The spiral heating tube 23 is arranged around the cylinder 10.

[0030] Specifically, this device incorporates an auxiliary structure and spiral heating tubes 23. Two different sized spiral heating tubes 23 are arranged around the outer walls of the inner cylinder 19 and the outer cylinder 20, respectively. A rotatable pusher paddle 29 and specially shaped arc blades push the material onto the inner cylinder 19 to generate hot air. Combined with the surrounding heating of the spiral heating tubes 23, the material is heated evenly, resulting in more uniform drying. By setting up a heat control structure, the heat dissipation grooves 18 and the fan 16 work together to dissipate some of the heat near the spiral heating tubes 23, retaining only the heat conducted to the wall surface and dissipating the excess heat inside. This avoids wear caused by overheating on the outside of the cylinder 10, thereby extending the service life of the device.

[0031] like Figure 1 and Figure 3 As shown, the support 11 has an L-shaped structure, and a support plate 15 is fixedly installed on the top surface of the support 11. A cylinder 10 is rotatably installed inside the support plate 15. Figure 1 and Figure 2 As shown, a gear ring 14 is fixedly connected to the curved surface of the cylinder 10, and a motor 12 is fixedly installed above the support 11. The output end of the motor 12 is connected to a gear 13, which meshes with the gear ring 14 to drive the transmission.

[0032] Specifically, during use, the starting motor 12 drives the gear 13 to mesh with the gear ring 14, thereby controlling the rotation of the cylinder 10 on the support plate 15 and the support 11. Here, the surface of the support 11 that contacts the inner cylinder 19 is an arc surface, which supports the inner cylinder 19.

[0033] like Figure 4 As shown, an inner heating cavity 22 is provided between the inner cylinder 19 and the outer cylinder 20. Two different sizes of spiral heating tubes 23 are provided; the smaller spiral heating tube 23 is arranged around the inner heating cavity 22. An outer heating cavity 21 is provided between the cylinder 10 and the outer cylinder 20, and the larger spiral heating tube 23 is arranged around the outer heating cavity 21. Figure 4As shown, a frustum-shaped return port 25 is provided between the outer cylinder 20 and the inner cylinder 19, and an L-shaped feed pipe 26 is provided at one end of the outer cylinder 20; Figure 4 and Figure 5 As shown, a return screw 27 is fixedly installed on the inner wall of the inner cylinder 19, and a feeding screw 28 is fixedly installed on the inner wall of the outer cylinder 20. The return screw 27 and the feeding screw 28 are in opposite directions. A fixing rod 30 is fixedly connected inside the inner cylinder 19. Three pusher blades 29 are fixedly connected to the curved surface of the fixing rod 30 via bearings. The blades of the pusher blades 29 are arc-shaped plates. Figure 2 and Figure 4 As shown, the diameter of the heat dissipation groove 18 corresponds to the outer cylinder 20. A heat dissipation perforation 17 is provided between the heat dissipation groove 18 and the inner heating cavity 22, and a heat dissipation through hole 24 is provided between the heat dissipation groove 18 and the outer heating cavity 21.

[0034] Specifically, firstly, the control ends of both the small and large spiral heating tubes 23 are located on the outer curved surface of the cylinder 10. The large spiral heating tube 23 is close to the outer curved surface of the outer cylinder 20, while the small spiral heating tube 23 is close to both the outer curved surface of the inner cylinder 19 and the inner curved surface of the outer cylinder 20. Thus, when material enters the outer cylinder 20 through the feed pipe 26, and the motor 12 controls the gear 13 to mesh with the gear ring 14, causing the cylinder 10 to rotate, the material passes through the feeding spiral 28 and approaches the return port 25. The frustum-shaped rotation of the return port 25 then transports the material into the inner cylinder 19. Here, the return port 25 extends deep into the inner cylinder. The inner cylinder 19 has a smaller port to prevent some material from returning to the outer cylinder 20. The material is conveyed by the return screw 27 inside the inner cylinder 19 and is also propelled by the arc-shaped blades of the pusher slurry 29. It is protected from being baked by the inner cylinder 19 and finally discharged from the inner cylinder 19. During the heating process of the spiral heating tube 23, the air from the fan 16 enters the inner heating chamber 22 and the outer heating chamber 21 through the heat dissipation perforation 17 and heat dissipation through hole 24 respectively, dissipating the excess heat inside both and retaining only the heat conducted on the inner cylinder 19 and the outer cylinder 20, thereby avoiding overheating of the outermost cylinder 10 surface to a certain extent.

[0035] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A double-cylinder rotary dryer, characterized in that, include Support (11), the support (11) is fixedly placed on the ground, and a cylinder (10) is rotatably arranged on the support (11). The cylinder (10) is provided with an inner cylinder (19) and an outer cylinder (20). An auxiliary structure is movably disposed inside the cylinder (10). The auxiliary structure includes a pusher slurry (29) and a fixing rod (30). The pusher slurry (29) is rotatably connected to the fixing rod (30), and the fixing rod (30) is fixedly disposed inside the inner cylinder (19). A heat control structure is movably disposed at one end of the cylinder (10). The heat control structure includes a fan (16), a heat dissipation groove (18), and a spiral heating tube (23). The fan (16) is rotatably disposed in the heat dissipation groove (18), which is located at one end of the cylinder (10). The spiral heating tube (23) is arranged around the cylinder (10).

2. The double-cylinder rotary dryer according to claim 1, characterized in that, The support (11) has an L-shaped structure. A support plate (15) is fixedly installed on the top surface of the support (11). A cylinder (10) is rotatably installed inside the support plate (15).

3. A double-cylinder rotary dryer according to claim 2, characterized in that, A gear ring (14) is fixedly connected to the curved surface of the cylinder (10), and a motor (12) is fixedly installed above the support (11). The output end of the motor (12) is connected to a gear (13), and the gear (13) meshes with the transmission gear ring (14).

4. A double-cylinder rotary dryer according to claim 1, characterized in that, An inner heating cavity (22) is provided between the inner cylinder (19) and the outer cylinder (20). The spiral heating tube (23) is provided in two different sizes. The smaller spiral heating tube (23) is arranged around the inner heating cavity (22). An outer heating cavity (21) is provided between the cylinder (10) and the outer cylinder (20). The larger spiral heating tube (23) is arranged around the outer heating cavity (21).

5. A double-cylinder rotary dryer according to claim 1, characterized in that, A frustum-shaped return port (25) is provided between the outer cylinder (20) and the inner cylinder (19), and an L-shaped feed pipe (26) is provided at one end of the outer cylinder (20).

6. A double-cylinder rotary dryer according to claim 1, characterized in that, A return screw (27) is fixedly installed on the inner wall of the inner cylinder (19), and a feeding screw (28) is fixedly installed on the inner wall of the outer cylinder (20). The return screw (27) and the feeding screw (28) are in opposite directions. A fixing rod (30) is fixedly connected inside the inner cylinder (19). Three pusher blades (29) are fixedly connected to the curved surface of the fixing rod (30) through bearings. The blades of the pusher blades (29) are arc-shaped plates.

7. A double-cylinder rotary dryer according to claim 1, characterized in that, The diameter of the heat dissipation groove (18) corresponds to that of the outer cylinder (20). A heat dissipation perforation (17) is provided between the heat dissipation groove (18) and the inner heating cavity (22), and a heat dissipation through hole (24) is provided between the heat dissipation groove (18) and the outer heating cavity (21).

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