Rotary drum type grain hot air dryer

Abstract

The invention discloses a rotary drum type grain hot air dryer. The grain drying device comprises a roller, a variable speed motor, a dip angle adjusting device, a control box, a rack and the like. The roller is divided into an outer layer and an inner layer, the outer layer of the roller is fixed to the rack through a supporting rotating shaft and connected with the balls, the roller is driven to rotate through a variable-speed motor, and the inner layer of the roller is of a hole-shaped structure. Anti-skid ribs are arranged on the inner layer of the roller, so that the slipping phenomenon generated in the process that grains are in contact with the inner wall can be reduced; the shoveling plate is welded at the tail end of the roller inner layer, so that grains are uniformly distributed in the drying process; the variable-speed motor is connected with the roller through a conveying belt and provides power for the dryer to drive the roller to rotate. A hot air drying device in the control box provides a heat source for the dryer, and an exhaust fan at the tail of the roller facilitates removal of damp and hot air; one end of the inclination angle adjusting device is connected with the roller, and the other end is connected to the rack; the control box is responsible for monitoring movement, temperature, humidity, drying time and the like during grain drying in real time.

Description

Technical Field

[0001] The invention belongs to a grain drying device and relates to a rotary drum type hot air grain drying machine. Background Art

[0002] At present, after the grain is harvested, due to its high moisture content, if it is not handled in time, it is easy to get moldy, grow grain storage pests and other unfavorable conditions, which reduces the edible quality and utilization rate of the grain. Natural drying needs to take into account different weather conditions. If there is continuous rainy weather, the grain cannot be dried in time and the quality will be greatly reduced. Even under the premise of good weather conditions, the grains under natural drying will burst and crack due to factors such as uneven heating and uncertain heating time. Natural drying is greatly affected by uncontrollable factors such as weather conditions and air humidity, which is not conducive to the precise control of the grain drying effect.

[0003] In general, even though the current grain dryers are diverse in types and complex in structure, and the drying efficiency is far superior to natural drying, there are still many shortcomings. For example, in the selection of heat source, some grain drying equipment uses coal as the heat source, and the drying temperature is not easy to control, which easily leads to uneven heating of the grain, and harmful substances will be produced during the combustion process, resulting in waste of resources; in the selection of drying structure, the grains of some grain drying equipment are in a static state during the drying process, and the heat transfer is uneven, which reduces the drying quality of the grains; in the drying process, the airflow in the drum is uneven, and the hot air cannot fully contact the grains.

[0004] It can be seen that the use of grain drying equipment to accurately dry grains is more in line with the development requirements of the current grain industry. Designing a grain dryer with controllable heat source and high heat transfer efficiency of the drying structure has great practical significance. Based on this idea, this design selects the hot air drying method and designs a rotary drum grain drying equipment with a drum as the main structure. Summary of the invention

[0005] In view of the above problems, the present invention proposes a rotary drum grain hot air dryer, which aims to optimize the rotary drum grain dryer by selecting a suitable heat source and improving the structure of the drum, so that the grains can be continuously turned in the drum to ensure the uniformity of rice drying. In addition, the inner structure of the drum is optimized so that the hot air is dispersed by a hole-like structure when entering the drum after being output by the control box, so that the hot air cannot gather in a specific part of the drum, and then can fully contact with the grains, and the internal grain drying process and effect are timely detected by the temperature and humidity sensor to avoid incomplete drying or over-drying.

[0006] The technical solution of the present invention is: a rotary drum type grain hot air dryer according to the present invention comprises a control box (3), a variable speed motor (5), a drum (6), a frame (7) and an inclination adjustment device (9), wherein the drum (6) comprises a drum outer layer (11) and a drum inner layer (12),

[0007] An anti-skid rib (13) is installed in the inner layer (12) of the drum, and a lifting plate (14) is welded at the tail end of the inner layer (12) of the drum;

[0008] The outer side of the outer layer (11) of the drum is fixedly mounted on the frame (7) via a supporting shaft (8) and is connected to a ball bearing.

[0009] Furthermore, the drum inner layer (12) has a hole-shaped structure, and a plurality of drum inner layer holes (15) are evenly distributed on the drum inner layer (12).

[0010] Furthermore, an exhaust fan (2) is arranged at the rear of the drum (6).

[0011] Furthermore, a variable speed motor (5) is arranged at the bottom of the drum (6), a conveyor belt is sleeved on the variable speed motor (5), and the variable speed motor (5) is connected to the drum (6) via the arranged conveyor belt.

[0012] Furthermore, an inclination adjustment device (9) is arranged on the lower side of the drum (6), one end of the inclination adjustment device (9) is connected to the drum (6), and the other end thereof is connected to the frame (7).

[0013] Furthermore, a temperature and humidity sensor (1) is arranged on the side wall of one side of the drum (6).

[0014] Furthermore, a control box (3) is connected to the side wall on the other side of the drum (6) through a pipeline.

[0015] Furthermore, a hot air drying device is arranged inside the control box (3) to provide a heat source for the dryer.

[0016] Furthermore, a fan (4) is arranged on the front outer wall of the control box (3).

[0017] Furthermore, a rotating roller (10) is arranged on the outer layer (11) of the drum.

[0018] The beneficial effects of the present invention are as follows: a control box is used to adjust the movement, temperature, humidity, drying time, etc. of grains during drying in real time, so that the control is more precise and convenient; the drum rotates and is provided with anti-skid ribs and lifting plates, which can drive the grains to be lifted during the rotation process to form a material curtain, so that the grains can be fully in contact with the hot air and heated evenly; the inner layer of the drum is designed with a hole-type structure so that the hot air is dispersed by the hole-type structure after entering the drum, so that the hot air is evenly distributed in various parts of the drum and fully in contact with the grains; the inclination angle adjustment device controls the inclination angle of the drum, so as to facilitate the movement of the grains during the drying process and the discharge of the grains after drying. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a side view of the overall structure of the present invention;

[0021] Figure 3 It is a schematic diagram of the overall structure of the drum in the present invention;

[0022] Figure 4 It is a schematic diagram of the structure of the holes in the inner layer of the drum in the drum of the present invention;

[0023] In the figure: 1: temperature and humidity sensor; 2: exhaust fan; 3: control box; 4: fan; 5: variable speed motor; 6: drum; 7: frame; 8: supporting shaft; 9: tilt adjustment device; 10: rotating roller; 11: outer layer of drum; 12: inner layer of drum; 13: anti-slip ribs; 14: copy board; 15: holes in the inner layer of drum. DETAILED DESCRIPTION

[0024] The specific technical scheme of the present invention is further described in detail below with reference to specific examples.

[0025] As shown in the figure, a rotary drum type grain hot air dryer according to the present invention comprises several parts such as a variable speed motor 5, a drum 6, an angle adjustment device 9, a control box 3, a frame 7, etc.;

[0026] The drum 6 is divided into two layers (drum outer layer 11, drum inner layer 12), the drum outer layer 11 is fixed on the frame 7 by the support shaft 8, connected with the ball bearing, and drives the drum 6 to rotate through the installed variable speed motor 5;

[0027] The inner layer 12 of the drum is a porous structure, which facilitates the hot air to enter the drum 6 in a dispersed manner after being output from the control box 3;

[0028] The inner layer 12 of the drum is provided with anti-skid ribs 13, which can reduce the slippage of grains when they come into contact with the inner wall, and help the grains form a material curtain during the rotation process;

[0029] A lifting plate 14 is welded at the tail end of the inner layer 12 of the drum, which can make the grain drying process evenly distributed and optimize the drying effect;

[0030] The variable speed motor 5 is connected to the drum 6 through a sleeved conveyor belt, providing power for the dryer and driving the drum 6 to rotate;

[0031] A hot air drying device is arranged in the control box 3, and the hot air drying device provides a heat source for the dryer;

[0032] The exhaust fan 2 arranged at the rear of the drum 6 facilitates the removal of hot and humid air;

[0033] One end of the tilt adjustment device 9 is connected to the drum 6, and the other end is connected to the frame 7, so as to control the tilt angle of the drum 6 and the discharge of the grains;

[0034] The control box 3 is responsible for real-time adjustment of the movement, temperature, humidity, drying time, etc. of the grains during drying.

[0035] The hot air is delivered to the inside of the drum 6 by the hot air drying device in the control box 3. The hot air passes through the dense holes in the inner layer 12 of the drum (holes in the inner layer of the drum 15) and penetrates between the grains. The grains in the drum 6 are evenly and fully contacted with the hot air under the action of the anti-slip ribs 13 and the lifting board 14, and the moisture in the grains is taken away in time. Finally, the hot air with water vapor is discharged through the exhaust fan 2;

[0036] The tilt adjustment device 9 controls the tilt angle of the drum 6, controls the movement of grains during the drying process and the discharge of the dried grains from the dryer, and completes the drying process;

[0037] In the present invention, each device can be controlled through the connection of wired lines. Specific embodiments

[0039] The grain particles are conveyed to the drum 6 by the grain suction machine, and the control box 3 first drives the variable speed motor 5 to adjust to the minimum speed to start the transmission system. The drum 6 starts to rotate under the drive of the variable speed motor 5, and the grain particles start to rotate with the drum 6 with the assistance of the anti-skid ribs 13 and the lifting board 14 inside the drum 6; at this time, the air volume adjustment device is opened through the control box 3, and the hot air enters the drum 6 through the holes 15 in the inner layer of the drum to heat the grain particles; after the wind speed is stable for a period of time, the control box 3 is adjusted to reach a higher wind speed to avoid excessive instantaneous drying rate of the grain particles under high moisture content, which causes cracks in the grain particles; the drying condition of the grain particles in the dryer is understood through the temperature and humidity sensor 1 on the dryer. After the moisture and temperature of the grain particles reach the predetermined drying requirements, the drum 6 fixed on the frame 7 is controlled to rotate up and down through the inclination adjustment device 9, and the frame 7 is used as a fulcrum to control the inclination adjustment device 9 to change the inclination of the drum 6 so that the grain particles slide out from the discharge port of the drum 6, and the drying and discharging of the grain particles are completed.

Claims

1. A rotary drum type grain hot air dryer, characterized in that: The invention comprises a control box (3), a variable speed motor (5), a roller (6), a frame (7) and an inclination adjustment device (9), wherein the roller (6) comprises a roller outer layer (11) and a roller inner layer (12). An anti-skid rib (13) is installed in the inner layer (12) of the drum, and a lifting plate (14) is welded at the tail end of the inner layer (12) of the drum; The outer side of the outer layer (11) of the drum is fixedly mounted on the frame (7) via a supporting shaft (8) and is connected to a ball bearing.

2. A rotary drum grain hot air dryer according to claim 1, characterized in that: The drum inner layer (12) is in a hole-shaped structure, and a plurality of drum inner layer holes (15) are evenly distributed on the drum inner layer (12).

3. A rotary drum grain hot air dryer according to claim 1, characterized in that: An exhaust fan (2) is arranged at the rear of the drum (6).

4. A rotary drum type grain hot air dryer according to claim 3, characterized in that: A variable speed motor (5) is also arranged at the bottom of the roller (6), a conveyor belt is sleeved on the variable speed motor (5), and the variable speed motor (5) is connected to the roller (6) via the arranged conveyor belt.

5. A rotary drum grain hot air dryer according to claim 1, characterized in that: An inclination adjustment device (9) is arranged on the lower side of the roller (6), one end of the inclination adjustment device (9) is connected to the roller (6), and the other end thereof is connected to the frame (7).

6. A rotary drum type grain hot air dryer according to claim 1, characterized in that: A temperature and humidity sensor (1) is arranged on the side wall of one side of the drum (6).

7. A rotary drum grain hot air dryer according to claim 1, characterized in that: A control box (3) is connected to the side wall on the other side of the drum (6) via a pipeline.

8. A rotary drum type grain hot air dryer according to claim 7, characterized in that: A hot air drying device for providing a heat source for the dryer is arranged inside the control box (3).

9. A rotary drum type grain hot air dryer according to claim 7, characterized in that: A fan (4) is arranged on the front outer wall of the control box (3).

10. A rotary drum type grain hot air dryer according to claim 1, characterized in that: A rotating roller (10) is also arranged on the outer layer (11) of the drum.

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