A crop cycle dryer

Abstract

This utility model discloses a circulating dryer for crops, relating to the field of crop processing technology. It includes a base, a drying drum, a screw conveyor, and a distribution trough. The drying drum is mounted on top of the base, and a screw conveyor is mounted on one side of the drying drum. A guide trough is installed inside the base. A main discharge pipe is located at the bottom of the drying drum, and a first and second discharge branch pipe are symmetrically arranged at the lower end of the main discharge pipe. The discharge port of the screw conveyor connects to the upper side of one side of the distribution trough. A hot air input mechanism is located on the upper outer wall of the drying drum, and a heating jacket is located on the inner side wall of the drying drum below the hot air input mechanism. This utility model, by setting a screw conveyor on one side of the drying drum and connecting the screw conveyor's inlet to the guide trough below the drying drum, enables the crops in the drying drum to be discharged through the screw conveyor and then re-enter the drying drum for circulating drying. Circulating drying is beneficial for thoroughly drying the crops.

Description

Technical Field

[0001] This utility model relates to the field of agricultural crop processing technology, and in particular to a crop circulating dryer. Background Technology

[0002] Agricultural processing dryers are mechanical devices specifically designed to remove moisture from crops, such as grains. These devices evaporate moisture from the crops by heating air or using other drying methods, thereby achieving the purpose of drying, preservation, and further processing.

[0003] Currently, most existing crop dryers perform single-stage drying, which suffers from a long drying cycle. Furthermore, although these dryers are equipped with a stirring mechanism to achieve uniform drying, in practice, achieving uniform drying solely through this mechanism still yields unsatisfactory results. Therefore, this invention proposes a circulating crop dryer to address the shortcomings of existing technologies. Summary of the Invention

[0004] To address the aforementioned problems, the purpose of this utility model is to provide a crop circulation dryer. By installing a screw conveyor on one side of the drying drum and connecting the feed inlet of the screw conveyor with the guide trough below the drying drum, the crops in the drying drum can be discharged through the screw conveyor and then re-enter the drying drum to achieve circulation drying. Circulation drying is beneficial for fully drying the crops.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A crop circulating dryer includes a base, a drying drum, a screw conveyor, and a distribution trough. The drying drum is mounted on the top of the base, and the screw conveyor is mounted on one side of the drying drum. A guide trough is installed inside the base. A main discharge pipe is provided at the bottom of the drying drum. A first discharge branch pipe and a second discharge branch pipe are symmetrically provided at the lower end of the main discharge pipe. One end of the first discharge branch pipe extends outward from the outside of the guide trough, and the second discharge branch pipe is located inside the guide trough. The inlet of the screw conveyor is connected to the inside of the guide trough. A distribution trough is provided at the top of the drying drum, and the outlet of the screw conveyor is connected to the upper side of one side of the distribution trough. A mixing and stirring mechanism is provided inside the drying drum. A hot air input mechanism is provided on the upper outer wall of the drying drum, and a heating jacket is provided on the inner side wall of the drying drum below the hot air input mechanism.

[0007] A further improvement is made in that: a first valve is provided on the first discharge branch pipe, and a second valve is provided on the second discharge branch pipe.

[0008] A further improvement is made in that: the distribution trough includes an outer shell and a distribution plate; the top of the drying cylinder is provided with an outer shell; the top of the outer shell is provided with a feeding port; a cover plate is provided on the feeding port; the distribution plate is inclinedly provided inside the outer shell; and the lower end of the outer shell is connected to the inside of the drying cylinder.

[0009] A further improvement is made in that: the distribution plate is provided with a first protruding strip, a second protruding strip, and a hemispherical protrusion; the first protruding strip is provided in multiple and is distributed in a fan shape at the top of the upper end of the distribution plate; the second protruding strip is provided in multiple and is arranged linearly at the top of the lower end of the distribution plate; and a hemispherical protrusion is provided on one side of the lower end of the multiple first protruding strips, and there are multiple hemispherical protrusions.

[0010] A further improvement is made in that: the mixing and stirring mechanism includes a stirring shaft, a stirring rod, and a stirring motor; the stirring shaft is rotatably installed inside the drying cylinder; the stirring rod is provided on the stirring shaft; and the stirring motor is provided at the top of the drying cylinder, driving the stirring shaft to rotate.

[0011] Further improvements include: the hot air input mechanism includes an arc-shaped cover, air holes, and an air inlet pipe; the upper outer wall of the drying cylinder is provided with an arc-shaped cover; the outer wall of the drying cylinder inside the arc-shaped cover is provided with air holes; multiple air holes are provided; the positions of the multiple air holes are adapted to the discharge port positions of the distribution trough; an air inlet pipe is provided on the side wall of the arc-shaped cover; and the air inlet pipe is connected to an external hot air source.

[0012] The beneficial effects of this utility model are as follows: By setting a screw conveyor on one side of the drying drum and connecting the feed inlet of the screw conveyor with the guide trough below the drying drum, the crops in the drying drum can be discharged through the screw conveyor and then re-enter the drying drum to achieve cyclic drying. Circular drying is beneficial to fully dry the crops.

[0013] This invention features a distribution trough at the top of the drying drum that connects to the outlet of a screw conveyor. This allows crops, which are circulated by the screw conveyor, to be evenly distributed through the distribution trough before entering the drying drum. The hot air input mechanism on the upper outer wall of the drying drum then blows the air through the drum for a second drying process, thereby comprehensively improving the drying quality of the crops. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural schematic diagram of the present utility model;

[0015] Figure 2 This is a three-dimensional disassembled schematic diagram of the drying cylinder structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the distribution trough structure of this utility model;

[0017] Figure 4This is a top view of the distribution plate structure of this utility model.

[0018] The components are as follows: 1. Base; 2. Drying cylinder; 3. Screw conveyor; 4. Distribution trough; 401. Outer shell; 402. Distribution plate; 403. First raised strip; 404. Second raised strip; 405. Hemispherical protrusion; 5. Guide trough; 6. Main discharge pipe; 7. First discharge branch pipe; 8. Second discharge branch pipe; 9. Heating jacket; 10. First valve; 11. Second valve; 12. Stirring shaft; 13. Stirring rod; 14. Stirring motor; 15. Arc-shaped cover; 16. Air hole; 17. Air inlet pipe. Detailed Implementation

[0019] To deepen the understanding of this utility model, the following detailed description will be provided in conjunction with embodiments. These embodiments are only used to explain this utility model and do not constitute a limitation on the scope of protection of this utility model.

[0020] according to Figure 1-4 As shown in the figure, this embodiment proposes a crop circulating dryer, including a base 1, a drying cylinder 2, a screw conveyor 3, and a distribution trough 4. The drying cylinder 2 is installed on the top of the base 1, and the screw conveyor 3 is installed on one side of the drying cylinder 2. A guide trough 5 is installed inside the base 1. A discharge main pipe 6 is provided at the bottom of the drying cylinder 2. A first discharge branch pipe 7 and a second discharge branch pipe 8 are symmetrically provided at the lower end of the discharge main pipe 6. One end of the first discharge branch pipe 7 extends out of the outside of the guide trough 5, and the second discharge branch pipe 8 is located inside the guide trough 5. The feed inlet of the screw conveyor 3 is connected to the inside of the guide trough 5. The distribution trough 4 is provided at the top of the drying cylinder 2. The discharge outlet of the screw conveyor 3 is connected to the upper side of the distribution trough 4. A mixing and stirring mechanism is provided inside the drying cylinder 2. A hot air input mechanism is provided on the upper outer wall of the drying cylinder 2. A heating jacket 9 is provided on the inner side wall of the drying cylinder 2 below the hot air input mechanism.

[0021] In operation, the crop circulating dryer of this invention involves feeding crops into the drying drum 2 through the distribution trough 4. Then, the screw conveyor 3, mixing and stirring mechanism, hot air input mechanism, and heating jacket 9 are activated. The crops falling from the distribution trough 4 are first dried by hot air input from the hot air input mechanism, and then enter the lower part of the drying drum 2 where they are heated and dried by the heating jacket 9. During this process, the mixing and stirring mechanism ensures uniform heating and drying. After one drying cycle, the crops are discharged through the second discharge branch pipe 8, allowing them to enter the guide trough 5 and be guided into the inlet of the screw conveyor 3. The screw conveyor 3 then transports the crops back into the distribution trough 4, and then they are fed back into the drying drum 2, achieving multiple cycles of drying, thus improving drying speed and uniformity. Finally, the dried crops are discharged through the first discharge branch pipe 7.

[0022] The first discharge branch pipe 7 is equipped with a first valve 10, and the second discharge branch pipe 8 is equipped with a second valve 11. During the circulating drying of crops, the first valve 10 is closed, and the second valve 11 is opened, allowing crops exiting the drying drum 2 to enter the guide trough 5 only through the second discharge branch pipe 8, and then be circulated by the screw conveyor 3. When the crops that have reached the drying standard are finally discharged, the second valve 11 is closed, and the first valve 10 is opened, allowing the crops to be discharged only through the first discharge branch pipe 7.

[0023] The distribution trough 4 includes a shell 401 and a distribution plate 402. The drying cylinder 2 has a shell 401 at its top, a feeding port at its top, and a cover plate on the feeding port. The distribution plate 402 is inclinedly arranged inside the shell 401, and the lower end of the shell 401 communicates with the interior of the drying cylinder 2. The distribution plate 402 has a first protrusion 403, a second protrusion 404, and a hemispherical protrusion 405. Multiple first protrusions 403 are arranged in a fan shape at the top of the upper end of the distribution plate 402. Multiple second protrusions 404 are arranged linearly at the top of the lower end of the distribution plate 402. A hemispherical protrusion 405 is provided on one side of the lower end of the multiple first protrusions 403. Multiple hemispherical protrusions 405 are provided. By setting an inclined distribution plate 402, and setting a first protruding strip 403, a second protruding strip 404 and a hemispherical protrusion 405 on the distribution plate 402, the crops discharged from the discharge port of the screw conveyor 3 can be evenly dispersed and guided to the drying cylinder 2 through the multiple diversion channels formed by the first protruding strip 403, the second protruding strip 404 and the hemispherical protrusion 405. This facilitates the uniform hot air input by the hot air input mechanism to dry the crops evenly in one hot air drying, thereby improving the drying uniformity.

[0024] The mixing mechanism includes a mixing shaft 12, a mixing rod 13, and a mixing motor 14. The mixing shaft 12 is rotatably mounted inside the drying cylinder 2, and the mixing rod 13 is mounted on the mixing shaft 12. The mixing motor 14 is located at the top of the drying cylinder 2, and the mixing motor 14 drives the mixing shaft 12 to rotate. By starting the mixing motor 14, the mixing shaft 12 is rotated, causing the mixing rod 13 to continuously stir the crops inside the drying cylinder 2.

[0025] The hot air input mechanism includes an arc-shaped cover 15, air holes 16, and an air inlet pipe 17. The arc-shaped cover 15 is located on the upper outer wall of the drying cylinder 2. Air holes 16 are located on the outer wall of the drying cylinder 2 inside the arc-shaped cover 15. Multiple air holes 16 are provided, and their positions are adapted to the discharge port positions of the distribution trough 4. An air inlet pipe 17 is located on the side wall of the arc-shaped cover 15, and the air inlet pipe 17 is connected to an external hot air source. The external hot air source of this invention is a heat pump hot air system. Hot air is input to blow and dry the feed material. The top of the drying cylinder 2 of this invention is also equipped with a dehumidification port.

[0026] This invention features a screw conveyor 3 on one side of the drying cylinder 2, with its inlet connected to a guide trough 5 below the drying cylinder 2. This allows crops to be discharged from the drying cylinder 2 via the screw conveyor 3 and then re-enter the drying cylinder 2 for cyclic drying, which promotes thorough drying of the crops. Furthermore, the invention includes a distribution trough 4 at the top of the drying cylinder 2, connected to the outlet of the screw conveyor 3. This allows the crops, circulated by the screw conveyor 3, to be evenly distributed within the drying cylinder 2 before entering. A hot air input mechanism on the upper outer wall of the drying cylinder 2 then blows the air through the trough for a final drying process, thus comprehensively improving the drying quality of the crops.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A crop circulating dryer, characterized in that: The equipment includes a base (1), a drying cylinder (2), a screw conveyor (3), and a distribution trough (4). The drying cylinder (2) is installed on the top of the base (1), and the screw conveyor (3) is installed on one side of the drying cylinder (2). A guide trough (5) is installed inside the base (1). A discharge main pipe (6) is provided at the bottom of the drying cylinder (2). A first discharge branch pipe (7) and a second discharge branch pipe (8) are symmetrically provided at the lower end of the discharge main pipe (6). One end of the first discharge branch pipe (7) extends out of the guide trough (5). On the side, the second discharge branch pipe (8) is located inside the guide trough (5). The feed inlet of the screw conveyor (3) is connected to the inside of the guide trough (5). The top of the drying cylinder (2) is provided with a distribution trough (4). The discharge outlet of the screw conveyor (3) is connected to the upper side of the distribution trough (4). The drying cylinder (2) is provided with a mixing and stirring mechanism. The upper outer wall of the drying cylinder (2) is provided with a hot air input mechanism. The inner wall of the drying cylinder (2) below the hot air input mechanism is provided with a heating jacket (9).

2. The crop circulating dryer according to claim 1, characterized in that: The first discharge branch pipe (7) is provided with a first valve (10), and the second discharge branch pipe (8) is provided with a second valve (11).

3. The crop circulating dryer according to claim 1, characterized in that: The distribution trough (4) includes a shell (401) and a distribution plate (402). The top of the drying cylinder (2) is provided with a shell (401). The top of the shell (401) is provided with a feeding port. The feeding port is provided with a cover plate. The distribution plate (402) is inclined inside the shell (401). The lower end of the shell (401) is connected to the inside of the drying cylinder (2).

4. A crop circulating dryer according to claim 3, characterized in that: The distribution plate (402) is provided with a first protrusion (403), a second protrusion (404) and a hemispherical protrusion (405). The first protrusion (403) is provided in multiple and is arranged in a fan shape at the top of the upper end of the distribution plate (402). The second protrusion (404) is provided in multiple and is arranged in a linear manner at the top of the lower end of the distribution plate (402). The lower end of the multiple first protrusions (403) is provided with a hemispherical protrusion (405), and there are multiple hemispherical protrusions (405).

5. A crop circulating dryer according to claim 1, characterized in that: The mixing mechanism includes a mixing shaft (12), a mixing rod (13), and a mixing motor (14). The mixing shaft (12) is rotatably installed inside the drying cylinder (2). The mixing rod (13) is provided on the mixing shaft (12). The mixing motor (14) is provided on the top of the drying cylinder (2). The mixing motor (14) drives the mixing shaft (12) to rotate.

6. A crop circulating dryer according to claim 4, characterized in that: The hot air input mechanism includes an arc-shaped cover (15), air holes (16) and an air inlet pipe (17). The upper outer wall of the drying cylinder (2) is provided with an arc-shaped cover (15). The outer wall of the drying cylinder (2) inside the arc-shaped cover (15) is provided with air holes (16). There are multiple air holes (16). The positions of the multiple air holes (16) are adapted to the discharge port positions of the distribution trough (4). The side wall of the arc-shaped cover (15) is provided with an air inlet pipe (17). The air inlet pipe (17) is connected to an external hot air source.

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