Hot air pipe assembly of grain dryer

Abstract

The hot air pipe assembly of the grain dryer comprises a drying shell, net pipe type air pipes and a mounting seat, a drying cavity with an upper opening and a lower opening is formed in the drying shell, the mounting seat is transversely fixed in the drying cavity, the net pipe type air pipes are fixed on the mounting seat, the net pipe type air pipes are vertically arranged in the drying cavity at intervals, and the net pipe type air pipes are fixed on the mounting seat. Grain enters the space between the net pipe type air pipes from the upper opening of the drying cavity and flows out from the lower opening, and hot air enters and exits the drying cavity through meshes in the pipe walls of the net pipe type air pipes to dry the grain. According to the grain dryer, a hot air structure in the grain dryer is improved so as to reduce impact on falling grains.

Description

Technical Field

[0001] This utility model relates to the field of grain drying equipment, and in particular to a hot air duct assembly for a grain dryer. Background Technology

[0002] Current grain dryers generally adopt a horizontal corner box array drying layer structure. Grain is circulated from top to bottom through this drying layer by coordinating equipment to achieve drying. This structure has limitations in structural design and drawbacks of modular design. The horizontal corner boxes are arranged in a horizontal matrix within the drying layer. These boxes are used for hot air entry and exit, and grain flow channels are formed between adjacent boxes. The falling grain directly collides with the surface of the horizontal corner boxes. Especially under high-speed drying conditions, the mechanical impact can easily cause damage to the outer skin or internal cracks of grain particles (such as rice and corn), significantly increasing the breakage rate and directly affecting commercial value and storage stability. Because the modular structure leads to a contradiction between load-bearing capacity and durability, the horizontal corner boxes are arranged in a modular matrix. A single unit integrates multiple sets of corner boxes, which are then spliced ​​together to form the drying layer. In continuous operation, the unit structure needs to withstand the vertical load of tons of grain and hot air pressure, which can easily lead to local deformation or even fracture due to stress concentration. It has strict requirements for material strength and welding process, which significantly increases the equipment manufacturing cost. In addition, the modular structure also leads to high maintenance costs. The modular design results in poor maintenance fault tolerance: a single corner box failure requires the disassembly of the entire matrix unit. Maintenance work involves large-scale shutdown and structural reorganization, which seriously affects the continuity of production. Utility Model Content

[0003] The purpose of this utility model is to solve the above-mentioned technical problems and provide a hot air pipe assembly for a grain dryer. This application improves the hot air structure inside the grain dryer to reduce the impact on falling grain.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] A hot air duct assembly for a grain dryer includes a drying shell, a mesh-type air duct, and a mounting base. The drying shell contains a drying chamber with openings at the top and bottom. The mounting base is horizontally fixed inside the drying chamber. The mesh-type air duct is fixed to the mounting base, and the mesh-type air duct is arranged vertically at intervals inside the drying chamber. Grain enters the drying chamber through the upper opening and flows out through the lower opening. Hot air enters and exits the drying chamber through the mesh holes on the wall of the mesh-type air duct to dry the grain.

[0006] According to the hot air duct assembly of the grain dryer of this application, the hot air structure is improved by adopting a vertically arranged mesh-type air duct, so that when the grain passes between the mesh-type air ducts from top to bottom, it will not collide with the mesh-type air ducts, thereby reducing the bursting rate of grain drying. The mounting base is used to fix the mesh-type air ducts so that they can be arranged vertically at intervals in the drying chamber.

[0007] Furthermore, the mesh-type air duct includes a mesh-type inlet pipe and a mesh-type outlet pipe. The mounting base includes an upper mounting base and a lower mounting base. The upper mounting base is fixed to the upper part of the drying chamber, and the lower mounting base is fixed to the lower part of the drying chamber. The upper end of the mesh-type inlet pipe is fixed to the upper mounting base, and the mesh-type outlet pipe is fixed to the lower mounting base. The upper and lower mounting bases are parallel to each other but vertically offset, so that the mesh-type inlet pipe and the mesh-type outlet pipe are spaced apart within the drying chamber. Hot air enters through the mesh-type inlet pipe and exits through the mesh-type outlet pipe, ensuring that the hot air must flow through the mesh openings of the mesh-type air duct to dry the grain, and then flow back into the mesh-type outlet pipe through the mesh openings before exiting again.

[0008] Furthermore, the upper part of the lower mounting base is provided with a plug-in post, and the lower inner cavity of the lower mounting base is an air outlet channel. The lower end of the mesh-type air outlet pipe is inserted into the plug-in post and communicates with the air outlet channel. The plug-in post can easily insert and fix the mesh-type air outlet pipe.

[0009] Furthermore, a conical baffle is provided at the top of the insertion post. The conical baffle can prevent grain from accumulating at the insertion post.

[0010] Furthermore, it also includes an air inlet hood, the upper part of which is a first conical surface, and the lower inner cavity of which is an air inlet channel. The air inlet hood is mounted on an upper mounting base, which has an air inlet connected to the air inlet channel and a mesh-type air inlet pipe. The first conical surface guides the grain into the space between the mesh-type air ducts, and the air inlet channel facilitates the entry of hot air into the drying chamber.

[0011] Furthermore, it also includes a conical top cover, which is positioned at the upper end of the mesh-type air outlet duct. The conical top cover guides the grain into the mesh-type air duct, preventing grain from falling into the middle of the mesh-type air outlet duct and blocking the air outlet channel.

[0012] Furthermore, it also includes duct connectors that connect adjacent mesh-type ducts. The duct connectors integrate the mesh-type ducts, making their structure more robust.

[0013] Furthermore, the drying housing is generally in the shape of a cube or cuboid, and the drying housing has a first side and a second side opposite to each other, with both ends of the mounting base fixed to the first side and the second side.

[0014] Furthermore, a first mesh plate is provided on the first and second sides. The first mesh plate can increase the ventilation performance of the drying chamber.

[0015] Furthermore, the drying shell also has opposing third and fourth sides, on which drying mesh frames are provided. These drying mesh frames communicate with the first and second sides, and an observation cover is provided on the outer side of the drying mesh frame. The drying mesh frame increases the ventilation performance of the drying chamber, and the observation cover allows for convenient observation of the grain drying process within the drying chamber. Attached Figure Description

[0016] Figure 1 This is an exploded view of the hot air duct assembly of the grain dryer of this utility model.

[0017] Figure 2 This is an exploded view of the hot air duct assembly of the grain dryer of this utility model from another angle.

[0018] Figure 3 This is a cross-sectional view of the hot air duct assembly of the grain dryer of this utility model.

[0019] Figure 4 for Figure 3 A magnified view of a portion of the image.

[0020] Figure 5 This is a structural schematic diagram of the duct connector of this utility model. Detailed Implementation

[0021] The accompanying drawings illustrate a hot air duct assembly for a grain dryer according to this utility model.

[0022] like Figures 1 to 5 The illustration shows a hot air duct assembly for a grain dryer. Other equipment in the grain dryer helps the grain circulate through the drying layer, ensuring even drying and preventing breakage due to prolonged heating. The hot air duct assembly includes a drying shell 1, a mesh-type air duct 2, and a mounting base 3. The drying shell 1 contains a drying chamber with openings at the top and bottom. The mounting base 3 is horizontally fixed within the drying chamber. The mesh-type air duct 2 is fixed to the mounting base 3, arranged vertically at intervals within the drying chamber. Grain enters the drying chamber through the upper opening and flows out through the lower opening. The vertical arrangement of the mesh-type air duct 2 prevents impact with the grain as it falls, reducing the breakage rate during drying. The mounting base 3 secures the mesh-type air duct 2, allowing it to be arranged vertically at intervals within the drying chamber. Hot air enters and exits the drying chamber through the mesh openings on the walls of the mesh-type air duct 2 to dry the grain.

[0023] The mesh-type air duct 2 includes a mesh-type air inlet duct 21 and a mesh-type air outlet duct 22. The mounting base 3 includes an upper mounting base 31 and a lower mounting base 32. The upper mounting base 31 is fixed to the upper part of the drying chamber, and the lower mounting base 32 is fixed to the lower part of the drying chamber. The upper end of the mesh-type air inlet duct 21 is fixed to the upper mounting base 31, and the mesh-type air outlet duct 22 is fixed to the lower mounting base 32. The upper mounting base 31 and the lower mounting base 32 are parallel to each other but vertically offset, so that the mesh-type air inlet duct 21 and the mesh-type air outlet duct 22 are spaced apart within the drying chamber. Figure 1 As shown, the mesh-type air inlet duct 21 has three rows, and the mesh-type air outlet duct 22 has two rows, as follows. Figure 3 As shown, the upper mounting base 31 and the lower mounting base 32 are parallel to each other and staggered left and right. The upper mounting base 31 is also provided with three, and the lower mounting base 32 is provided with two, so that the two rows of mesh-type air outlet pipes 22 are spaced between the three rows of mesh-type air inlet pipes 21.

[0024] like Figure 3 and Figure 4 As shown, the upper part of the lower mounting base 32 is provided with a plug post 323, and the lower inner cavity of the lower mounting base 32 is an air outlet channel 321. The lower end of the mesh-type air outlet pipe 22 is inserted into the plug post 323 and communicates with the air outlet channel 321.

[0025] like Figure 4 As shown, a conical baffle 4 is provided at the top of the insertion post 323. The conical baffle 4 is sleeved on the mesh-type air outlet pipe 22. The top of the insertion post 323 is provided with a mounting flange, which supports the conical baffle 4. The conical baffle 4 can also be fixed by the mounting flange and threads. The conical baffle 4 can prevent grain from accumulating at the top of the insertion post 323. A second conical surface 322 is provided between the insertion post 323 and the air outlet channel 321. The second conical surface 322 guides the grain so that it can flow to the lower opening of the drying chamber.

[0026] like Figure 3 As shown, it also includes an air inlet hood 6. The upper part of the air inlet hood 6 is a first conical surface 61, and the lower inner cavity of the air inlet hood 6 is an air inlet channel 62. The air inlet hood 6 covers the upper mounting base 31, and the upper mounting base 31 is provided with an air inlet. The air inlet connects the air inlet channel 62 and the mesh-type air inlet pipe 21. The first conical surface 61 can guide the grain and prevent the grain from accumulating on the air inlet hood 6.

[0027] like Figure 3As shown, it also includes a conical top cover 5. The two ends of the conical top cover 5 are fixed to the inner side wall of the drying shell 1, and the conical top cover 5 is set at the upper end of the mesh-type air outlet pipe 22. The conical top cover 5 and the first conical surface 61 can cooperate with each other, so that the grain can flow between the mesh-type air outlet pipe 2, and can also prevent the grain from falling into the middle of the mesh-type air outlet pipe 22 and blocking the air outlet channel 321.

[0028] like Figure 5 As shown, it also includes a duct connector 8, which connects adjacent mesh-type ducts 2. By connecting the mesh-type ducts 2 one by one through the duct connector 8, a whole structure can be formed, which can make the structure of the mesh-type duct 2 more stable. The duct connector 8 includes two semi-circular sleeves and a connecting rod. The two semi-circular sleeves are connected by bolts to fit onto the mesh-type duct 2, and then connected to the connecting rod by the bolts, so that the semi-circular sleeves on adjacent mesh-type ducts 2 are connected to form a whole structure, thereby making the structure of the mesh-type duct 2 more stable.

[0029] like Figure 1 and Figure 2 As shown, the drying housing 1 is generally in the shape of a cube or cuboid. The drying housing 1 has a first side 11 and a second side 12 opposite to each other. The two ends of the mounting base 3 are fixed on the first side 11 and the second side 12. The air inlet channel 62 and the air outlet channel 321 are both connected to the first side 11 and the second side 12, so that hot air can enter from the upper end of the first side 11 and the second side 12 and flow out from the lower end of the first side 11 and the second side 12.

[0030] like Figure 1 and Figure 2 As shown, the first side 11 and the second side 12 are provided with a first mesh plate (111, 121). The mesh holes on the first mesh plate (111, 121) can increase the ventilation performance of the drying chamber and improve the drying effect.

[0031] like Figure 1 and Figure 2 As shown, the drying shell 1 also has opposing third side 13 and fourth side 14, on which a drying mesh frame 7 is provided. The drying mesh frame 7 is connected to the first side 11 and the second side 12. An observation cover 71 is provided on the outer side of the drying mesh frame 7. The observation cover 71 is detachable or transparent, so that the state of the grain in the drying layer can be easily observed. The drying mesh frame 7 also includes a second mesh plate 73 and a frame 72. The mesh of the second mesh plate 73 allows for ventilation and does not affect the observation of the grain state by the observation cover 71. The frame 72 provides support for the second mesh plate 73 and forms a ventilation space.

[0032] The mesh size of this application is smaller than that of the grain, so that it can be used for ventilation while preventing the grain from leaking out of the mesh.

[0033] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to this utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A hot-air duct assembly of a grain dryer, characterized in that The dryer comprises a drying shell, a net tube type air pipe and a mounting seat. The drying shell has an upper and lower opening drying cavity. The mounting seat is fixed horizontally in the drying cavity. The net tube type air pipe is fixed on the mounting seat, and the net tube type air pipe is arranged vertically and spaced in the drying cavity. The grain enters the net tube type air pipe from the upper opening of the drying cavity and flows out from the lower opening. The hot air enters and exits the drying cavity through the mesh holes on the pipe wall of the net tube type air pipe to dry the grain.

2. The hot-air duct assembly of the grain dryer according to claim 1, characterized in that The net tube type air pipe comprises a net tube type air inlet pipe and a net tube type air outlet pipe. The mounting seat comprises an upper mounting seat and a lower mounting seat. The upper mounting seat is fixed on the upper part of the drying cavity, and the lower mounting seat is fixed on the lower part of the drying cavity. The upper end of the net tube type air inlet pipe is fixed on the upper mounting seat, and the net tube type air outlet pipe is fixed on the lower mounting seat. The upper mounting seat and the lower mounting seat are parallel to each other but vertically dislocated, so that the net tube type air inlet pipe and the net tube type air outlet pipe are arranged spaced in the drying cavity.

3. The hot-air duct assembly of the grain dryer according to claim 2, characterized in that The upper part of the lower mounting seat is provided with a plug-in column, and the lower cavity of the lower mounting seat is an air outlet channel. The lower end of the net tube type air outlet pipe is plug-in installed in the plug-in column and communicates with the air outlet channel.

4. The hot-air duct assembly of the grain dryer according to claim 3, characterized in that The top of the plug-in column is provided with a conical baffle.

5. The hot-air duct assembly of the grain dryer according to claim 2, characterized in that, The dryer further comprises an air inlet cover. The upper part of the air inlet cover is a first conical surface, and the lower cavity of the air inlet cover is an air inlet channel. The air inlet cover covers the upper mounting seat. The upper mounting seat is provided with an air inlet. The air inlet communicates the air inlet channel and the net tube type air inlet pipe.

6. The hot-air duct assembly of the grain dryer according to claim 2, characterized in that The dryer further comprises a conical top cover arranged on the upper end of the net tube type air outlet pipe.

7. The hot-air duct assembly of the grain dryer according to claim 1, characterized in that, The dryer further comprises an air pipe connecting piece connecting adjacent net tube type air pipes.

8. The hot-air duct assembly of the grain dryer according to claim 1, characterized in that The drying shell is a whole square or rectangular body. The drying shell has opposite first and second side surfaces. The two ends of the mounting seat are fixed on the first and second side surfaces.

9. The hot-air duct assembly of the grain dryer according to claim 8, characterized in that The first and second side surfaces are provided with first mesh plates.

10. The hot-air duct assembly of the grain dryer according to claim 8, characterized in that The drying shell further has opposite third and fourth side surfaces. The third and fourth side surfaces are provided with drying mesh racks. The drying mesh racks communicate with the first and second side surfaces. The outer side surfaces of the drying mesh racks are provided with observation covers.

Images