Multi-layer grain dryer

Abstract

The invention provides a multi-layer grain drying machine, and relates to the technical field of drying devices. According to the technical scheme, the multi-layer grain dryer comprises a drying chamber, a feeding port and a discharging port are formed in the drying chamber, at least two layers of drying bins are arranged in the drying chamber from top to bottom, and a discharging port is formed in each layer of drying bin; the driving mechanism comprises a rotating shaft, and an inner guide stirring mechanism and an outer guide stirring mechanism are arranged on the rotating shaft. The invention aims to increase the moving distance of materials by utilizing an inner guide stirring mechanism and an outer guide stirring mechanism, so that the space utilization rate of dryers with the same size is higher.

Description

Technical Field

[0001] The invention relates to the technical field of drying devices, and in particular to a multi-layer grain dryer. Background Art

[0002] Grain drying is an important step in grain processing. Drying can remove excess moisture from grain, reduce the risk of mildew and bacteria growth, prevent grain from heating, sprouting and mildew during storage, reduce post-harvest grain losses due to moisture, mildew and other reasons, ensure safe storage of grain, and thus protect grain quality and safety. In addition, dried grain is easier to store and transport, prolongs its shelf life, and improves its market competitiveness.

[0003] Grain dryer refers to a hot air drying box that uses a rotary heating device and can generate a large amount of hot air in a short time. It can kill insect eggs and remove moisture through high temperature treatment, thus solving the problem of grain drying.

[0004] At present, the existing grain dryers have low space utilization. In order to achieve better drying effects, most of them need to use larger dryers. This type of dryer is large in size, complicated to operate, and inconvenient to transport. Summary of the invention

[0005] The object of the present invention is to provide a multi-layer grain dryer, which utilizes an inner guide stirring mechanism and an outer guide stirring mechanism to increase the moving distance of materials and improve the space utilization rate of dryers of the same size.

[0006] The technical solution of the present invention is achieved in this way:

[0007] The technical solution of the present application provides a multi-layer grain dryer, comprising a drying chamber, wherein a feed port and a discharge port are provided on the drying chamber, wherein the feed port is located at the top of the drying chamber, wherein at least two layers of drying bins are provided in the drying chamber from top to bottom, wherein each layer of drying bins is provided with a feed drop port, wherein the feed drop ports of two adjacent layers of drying bins are respectively arranged opposite to each other on the inner ring side and the outer ring side thereof, wherein the feed port provided on the top of the drying chamber is located on the inner ring side or the outer ring side of the top of the drying chamber, and the feed drop port of the uppermost drying bin adjacent to the top of the drying chamber is located on the outer ring side or the inner ring side opposite to the feed port provided on the top of the drying chamber;

[0008] The driving mechanism includes a rotating shaft, which extends from the bottom of the drying chamber to the top of the drying chamber and passes through each layer of the drying bin. The rotating shaft in the drying bin with a drop-out opening on the inner ring side is provided with an inner guide stirring mechanism, and the rotating shaft in the drying bin with a drop-out opening on the outer ring side is provided with an outer guide stirring mechanism.

[0009] In some embodiments of the present invention, the internal guide stirring mechanism includes at least one group of first stirring members, each group of first stirring members includes a first connecting rod, one end of the first connecting rod is connected to the rotating shaft, and the other end of the first connecting rod is provided with an internal guide flap, and the side of the inner guide flap away from the first connecting rod is inclined relative to the rotation direction of the rotating shaft, and the upper part of the inner guide flap is inclined downward in the opposite direction to the rotation direction of the rotating shaft.

[0010] In some embodiments of the present invention, the internal guide stirring mechanism includes multiple groups of first stirring members, and the first connecting rods of the multiple groups of first stirring members are arranged at equal angles along the rotating shaft. The lengths of the multiple first connecting rods become shorter in sequence from the longest one in the opposite direction of rotation of the rotating shaft.

[0011] In some embodiments of the present invention, the distance along which the multiple first connecting rods gradually shorten along the rotation direction of the shaft is the difference between the distance from the side of the bottom of the inner guide flap away from the shaft to the shaft and the distance from the side of the bottom of the inner guide flap close to the shaft to the shaft.

[0012] In some embodiments of the present invention, the external guide stirring mechanism includes at least one group of second stirring elements, each group of second stirring elements includes a second connecting rod, one end of the second connecting rod is connected to the rotating shaft, and the other end of the second connecting rod is provided with an external guide flap, and the side of the external guide flap away from the second connecting rod is inclined opposite to the rotation direction of the rotating shaft, and the upper part of the external guide flap is inclined downward in the opposite direction to the rotation direction of the rotating shaft.

[0013] In some embodiments of the present invention, the external guide stirring mechanism includes multiple groups of second stirring members, and the second connecting rods of the multiple groups of second stirring members are arranged at equal angles along the rotating shaft. The lengths of the multiple second connecting rods become shorter from the longest one along the rotation direction of the rotating shaft.

[0014] In some embodiments of the present invention, the distance along which the multiple second connecting rods gradually shorten along the rotation direction of the shaft is the difference between the distance from the side of the bottom of the outer guide flap away from the shaft to the shaft and the distance from the side of the bottom of the outer guide flap close to the shaft to the shaft.

[0015] In some embodiments of the present invention, each layer of the drying bin is connected to the inner side of the drying chamber.

[0016] In some embodiments of the present invention, in two adjacent layers of drying bins, one side of one layer of the drying bins is connected to one side of the interior of the drying chamber, and a first air duct is formed between the other side of the drying bin of this layer and the other side of the interior of the drying chamber; the other side of the other layer of the drying bins is connected to the other side of the interior of the drying chamber, and a second air duct is formed between one side of the drying bin of this layer and one side of the interior of the drying chamber.

[0017] In some embodiments of the present invention, a third air duct is provided between two adjacent layers of drying bins.

[0018] In some embodiments of the present invention, a material guide pipe extending toward the bottom is provided on the material drop opening of each layer of the drying bin.

[0019] In some embodiments of the present invention, a heating device is provided inside the drying chamber, and the heating device is located at the bottom of the drying chamber.

[0020] In some embodiments of the present invention, a guide portion is provided at the bottom of each drying bin, and a drainage piece matching the guide portion at the bottom of each drying bin is provided on the side wall of the drying chamber at the bottom of the drying bin, and a pipe connected to the outside of the drying chamber and matching the drainage piece is provided on the drying chamber.

[0021] Compared with the prior art, the technical solution of the present invention has at least the following advantages or beneficial effects:

[0022] a) In the present application, the blanking openings of the two adjacent layers of drying bins are arranged opposite to each other on the inner ring side and the outer ring side thereof, the feed opening opened at the top of the drying chamber is located on the inner ring side or the outer ring side of the top of the drying chamber, and the blanking opening of the uppermost drying bin adjacent to the top of the drying chamber is located on the outer ring side or the inner ring side opposite to the feed opening opened at the top of the drying chamber, an inner guide stirring mechanism is provided on the rotating shaft in the drying bin where the blanking opening is opened on the inner ring side, and an outer guide stirring mechanism is provided on the rotating shaft in the drying bin where the blanking opening is opened on the outer ring side, and the inner guide stirring mechanism and the outer guide stirring mechanism are used to turn and stir the material, so that the material moves from the outer side of the drying bin to the inner side during the turning process and falls into the drying bin of the next layer, and moves from the inner side of the drying bin to the outer side during the turning process in the drying bin of the next layer and then falls into the drying bin of the next layer, and the above steps are repeated in this way until the material falls from the drying bin of the lowest layer, thereby increasing the moving distance of the material in the drying bin, thereby improving the space utilization rate of the dryer and achieving a better drying effect;

[0023] b) The internally guided stirring mechanism used in the present application includes a plurality of first stirring members. When the material is stirred and turned over and pushed from the outside of the drying bin to the inside, the stirring and turning frequency of the material is increased, thereby further improving the stirring effect and thus improving the material drying effect;

[0024] c) The externally guided stirring mechanism used in the present application includes a plurality of second stirring members. When the material is stirred and turned over and pushed from the inside of the drying bin to the outside, the frequency of stirring and turning the material is increased, thereby further improving the stirring effect and thus improving the material drying effect;

[0025] d) In the present application, two adjacent layers of drying bins are connected to the opposite side of the drying chamber, so that the first air duct and the second air duct are formed respectively on the other side of the drying chamber, and a third air duct is provided between the adjacent layers of the two adjacent layers of drying bins, which can increase the path distance of the hot air in the drying chamber, thereby improving the drying effect of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 It is a schematic diagram of a perspective structure of a multi-layer grain drying machine according to an embodiment of the present invention;

[0028] Figure 2 It is a three-dimensional perspective structural schematic diagram of an embodiment of a multi-layer grain drying machine of the present invention;

[0029] Figure 3 It is a schematic diagram of the top view of the structure of an embodiment of a drying bin with an internal guide stirring mechanism in the present invention;

[0030] Figure 4 It is a schematic top view of another embodiment of a drying bin with an internal guide stirring mechanism in the present invention;

[0031] Figure 5 It is a schematic diagram of a top view of a drying bin with an external guide stirring mechanism according to an embodiment of the present invention;

[0032] Figure 6 It is a top view of another embodiment of a drying bin with an external guide stirring mechanism in the present invention;

[0033] Figure 7 It is a schematic diagram of a perspective structure of a multi-layer grain drying machine according to another embodiment of the present invention;

[0034] Figure 8 It is a three-dimensional perspective structural schematic diagram of another embodiment of a multi-layer grain drying machine of the present invention;

[0035] Fig. 9 It is a schematic top view of another embodiment of a drying bin with an internal guide stirring mechanism in the present invention;

[0036] Fig.10 It is a schematic diagram of the three-dimensional structure of another embodiment of a drying bin with an internal guide stirring mechanism in the present invention;

[0037] Fig.11 It is a top view of another embodiment of a drying bin with an external guide stirring mechanism in the present invention;

[0038] Fig.12 It is a three-dimensional structural schematic diagram of another embodiment of a drying bin with an external guide stirring mechanism in the present invention;

[0039] Fig.13 It is a schematic diagram of a perspective structure of a multi-layer grain drying machine according to another embodiment of the present invention;

[0040] Fig.14 It is a three-dimensional perspective structural schematic diagram of another embodiment of a multi-layer grain drying machine of the present invention;

[0041] Fig.15 This is a schematic diagram of the perspective structure of a multi-layer grain dryer according to another embodiment of the present invention.

[0042] Icons: 100-drying chamber, 110-feed port, 120-discharge port, 130-flow guide, 200-drying bin, 210-feed port, 220-guide pipe, 230-flow guide part, 310-rotating shaft, 411-first connecting rod, 412-inner guide flap, 511-second connecting rod, 512-outer guide flap, 600-first air duct, 700-second air duct, 800-third air duct, 900-pipeline. DETAILED DESCRIPTION

[0043] Example 1

[0044] Please refer to Figures 1 to 6 The present embodiment describes a multi-layer grain dryer, including a drying chamber 100, wherein the drying chamber 100 is provided with a feed port 110 and a discharge port 120. Materials are put into the feed port 110 of the drying chamber 100, and after being dried in the drying chamber 100, the materials fall out through the discharge port 120 for storage.

[0045] In the present embodiment, the feed inlet 110 is located at the top of the drying chamber 100, and at least two layers of drying bins 200 are provided in the drying chamber 100 from top to bottom. Preferably, in the present embodiment, five layers of drying bins 200 are provided in the drying chamber 100 from top to bottom. It should be noted that, in the drying chamber 100 of the present embodiment, the specific number of layers of drying bins 200 arranged in sequence from top to bottom is not a limitation of the present embodiment. A drying chamber 100 of corresponding volume height can be selected according to actual needs and in combination with the required drying effect, and the drying bins 200 of corresponding number as described above can be arranged in the drying chamber 100, and a feed opening 210 is provided on each layer of the drying bins 200, and the feed openings 210 of the two adjacent layers of the drying bins 200 can be opened. The openings 210 are respectively arranged relatively on the inner ring side and the outer ring side thereof, and the feed opening 110 opened at the top of the drying chamber 100 is located on the inner ring side or the outer ring side of the top of the drying chamber 100. Preferably, in this embodiment, the feed opening 110 opened at the top of the drying chamber 100 is located on the outer ring side of the top of the drying chamber 100. When this setting is adopted, there is no need to move the unloading port of the feeding equipment to the position close to the inner ring side of the drying chamber 100 during use, which is more convenient for feeding the material to be dried into the drying chamber 100. It should be noted that in this embodiment, the specific setting of the feed opening 110 opened at the top of the drying chamber 100 being located on the outer ring side of the top of the drying chamber 100 is not a limitation of this embodiment, and can also be changed according to actual conditions. In some cases, the feed port 110 opened at the top of the drying chamber 100 is opened on the inner ring side or other position of the top of the drying chamber 100, and the drop port 210 of the uppermost drying bin 200 adjacent to the top of the drying chamber 100 is located on the outer ring side or the inner ring side opposite to the feed port 110 opened at the top of the drying chamber 100. Preferably, in this embodiment, the drop port 210 of the uppermost drying bin 200 adjacent to the top of the drying chamber 100 is located on the inner ring side opposite to the feed port 110 opened at the top of the drying chamber 100. When in use, after the material to be dried enters the uppermost drying bin 200 through the feed port 110 opened at the top of the drying chamber 100, the material can be discharged from the drying bin 200 by stirring and turning. 0 The outer ring side gradually moves toward the inner ring side of the drying bin 200, thereby increasing the distance the material moves in the drying bin 200, and finally enters the drying bin 200 of the next layer through the drop opening 210 located on the inner ring side of the drying bin 200. It should be noted that in this embodiment, the specific setting of the drop opening 210 of the uppermost drying bin 200 adjacent to the top of the drying chamber 100 being located on the inner ring side opposite to the feed opening 110 opened at the top of the drying chamber 100 is not a limitation of this embodiment. The position of the drop opening 210 of the uppermost drying bin 200 can be selected according to actual needs and in combination with the position of the feed opening 110 opened at the top of the drying chamber 100 and the stirring and drying effect to be achieved;

[0046] The driving mechanism includes a rotating shaft 310. It should be noted that in the present embodiment, other structures of the driving mechanism can be selected according to actual needs. For example, the driving motor can be selected according to the actual needs. The corresponding model can be set outside the drying chamber 100 or inside the drying chamber 100 according to actual needs. For example, the reduction gear set can be selected according to the actual needs. The model, quantity and matching method of the reduction gear can be selected so that the driving motor can drive the rotating shaft 310 to rotate to achieve the required speed and torque. The rotating shaft 310 extends from the bottom of the drying chamber 100 to the top of the drying chamber 100 and passes through each layer of the drying bin 200. The blanking port 210 is opened on the drying bin 200 on one side of the inner ring. An inner guide is provided on the rotating shaft 310. The stirring mechanism realizes the turning and stirring of the material through the inner guide stirring mechanism, and pushes the material to gradually move from the outer ring side of the drying bin 200 to the inner ring side. The drop port 210 is opened on the outer ring side of the drying bin 200 and an outer guide stirring mechanism is provided on the rotating shaft 310. The turning and stirring of the material is realized through the outer guide stirring mechanism, and the material is pushed to gradually move from the inner ring side of the drying bin 200 to the outer ring side. When this embodiment is in use, looking down at the rotating shaft 310, its rotation direction is counterclockwise. It should be noted that the rotation direction of the rotating shaft 310 in this embodiment can be selected according to actual conditions, and the inner guide stirring mechanism and the outer guide stirring mechanism on it can be set according to the rotation direction of the rotating shaft 310, so that it can realize the guidance of the material.

[0047] It should be noted that, if as mentioned above, the specific number of layers of the drying bin 200 is not limited in this embodiment, and a drying chamber 100 of corresponding volume height can be selected according to actual needs and the required drying effect, and a corresponding number of layers of drying bins 200 as described above can be set in the drying chamber 100. On this basis, the number of layers of the drying bin 200 set in the drying chamber 100 of this embodiment is at least two layers, so as to ensure that the dried material can move from the outside to the inside of one drying layer and fall into the next drying layer, and then the material can move from the inside to the outside in the drying layer, completing at least one sequence to ensure the drying effect.

[0048] In this embodiment, the inner guide stirring mechanism includes at least one group of first stirring members. In this embodiment, in order to achieve higher turning efficiency and guiding and pushing efficiency of the material, three groups of first stirring members are specifically provided. Each group of first stirring members includes a first connecting rod 411. One end of the first connecting rod 411 is connected to the rotating shaft 310. The other end of the first connecting rod 411 is provided with an inner guide flap 412. By providing the first connecting rod 411, it is convenient to install and connect the inner guide flap 412. The side of the inner guide flap 412 away from the first connecting rod 411 is inclined relative to the rotation direction of the rotating shaft 310. The rotation direction of the rotating shaft 310 is counterclockwise, so that when the inner guide flap 412 stirs the material, The material can be pushed from the side of the drying bin 200 close to the outer ring to the side of the drying bin 200 close to the inner ring. The upper part of the inner guide flap 412 is tilted downward in the opposite direction to the rotation direction of the rotating shaft 310, so that when the inner guide flap 412 stirs the material, while pushing the material from the side of the drying bin 200 close to the outer ring to the side of the drying bin 200 close to the inner ring, some of the material can be pushed from the bottom of the inner guide flap 412 to the top and over the top, thereby turning the material and increasing the residence time of the material in the drying bin 200 to achieve a better drying effect. It should be noted that in this embodiment, the number of the first stirring members included in the inner guide stirring mechanism can be selected according to actual needs.

[0049] In this embodiment, the external guide stirring mechanism includes at least one group of second stirring members. In order to achieve higher turning efficiency and guiding and pushing efficiency for the material, three groups of second stirring members are specifically provided. Each group of second stirring members includes a second connecting rod 511. One end of the second connecting rod 511 is connected to the rotating shaft 310. The other end of the second connecting rod 511 is provided with an external guide flap 512. By providing the second connecting rod 511, it is convenient to install and connect the external guide flap 512. The side of the external guide flap 512 away from the second connecting rod 511 is inclined in the opposite direction to the rotation direction of the rotating shaft 310. The rotation direction of the rotating shaft 310 is counterclockwise, so that the external guide flap 512 can be turned when stirring the material. The material is pushed from the inner ring side of the drying bin 200 to the outer ring side of the drying bin 200, and the upper part of the outer guide flap 512 is tilted downward in the opposite direction to the rotation direction of the rotating shaft 310, so that when the outer guide flap 512 stirs the material, while pushing the material from the inner ring side of the drying bin 200 to the outer ring side of the drying bin 200, part of the material can be pushed from the bottom of the outer guide flap 512 to the top and over the top, thereby turning the material and increasing the residence time of the material in the drying bin 200 to achieve a better drying effect. It should be noted that in this embodiment, the number of second stirring members included in the outer guide stirring mechanism can be selected according to actual needs.

[0050] In the present embodiment, each layer of drying bin 200 is connected to the inner side of the drying chamber 100. Among two adjacent layers of drying bin 200, one side of one layer of drying bin 200 is connected to one side of the inside of the drying chamber 100, and a first air duct 600 is formed between the other side of the drying bin 200 of this layer and the other side of the inside of the drying chamber 100; the other side of another layer of drying bin 200 is connected to the other side of the inside of the drying chamber 100, and a second air duct 700 is formed between one side of the drying bin 200 of this layer and one side of the inside of the drying chamber 100. A third air duct 800 is opened between adjacent layers of two adjacent layers of drying bin 200. The third air duct 800 is located between the bottom and the top of the two adjacent layers of drying bin 200, and the first air duct 600, the second air duct 700 and the third air duct 800 are used to cool the air in the drying chamber 100. 00, air circulation between the drying bins 200 between each layer is realized. When drying, the heat flow can circulate in sequence from the bottom of the drying chamber 100, the first air duct 600, the third air duct 800, the second air duct 700, the third air duct 800 and then to the first air duct 600, and enter into the drying bins 200 on each layer to dry the materials therein, and finally reach the top of the drying chamber 100 through the first air duct 600 or the second air duct 700 and enter into the drying bin 200 on the uppermost layer. By setting the first air duct 600, the second air duct 700 and the third air duct 800, the path of the heat flow in the drying chamber 100 can be increased, the residence time of the heat flow in each layer of the drying bins 200 can be increased, and the drying effect on the materials can be improved.

[0051] In the present embodiment, a heating device is provided inside the drying chamber 100, which is not shown in the accompanying drawings. The heating device is located at the bottom of the drying chamber 100. It should be noted that in the present embodiment, there is no restriction on the model of the heating device used and the position thereof in the drying chamber 100, which can be selected according to actual needs, such as providing an air inlet on the outer wall of the drying chamber 100, and the heating device is connected to the air inlet through an air supply pipe to provide heat to the drying chamber 100.

[0052] In this embodiment, an air outlet is provided on the drying chamber 100, and the air outlet is located at the bottom of the drying chamber 100. The heating device transports the hot air into the drying chamber through the air inlet on the drying chamber 100 through the air supply pipe to heat and dry the materials. The exhaust pipe is respectively connected to the air outlet and the heating device on the drying chamber 100. The air outlet is located at the top of the drying chamber 100. The hot air flows from the bottom to the top of the drying chamber 100 and heats the materials. Then, the hot air enters the exhaust pipe through the air outlet on the drying chamber 100 and then enters the heating device. The hot air is heated again by the heating device and then transported to the drying chamber 100, so that the internal heating circulation can be realized. Compared with directly drawing air from the outside for heating and heat supply, the hot air that heats and dries the materials inside the drying chamber 100, although the temperature will be lower, its basic temperature is higher than that of the outside. If it is heated again, the energy consumption required for heating will be high or low, which can achieve the effect of energy saving.

[0053] Example 2

[0054] See also Figures 7 to 12 The multi-layer grain dryer described in this embodiment is a further technical solution of the above-mentioned embodiment 1, and the difference is that: the inner guide stirring mechanism includes at least one group of first stirring members. In this embodiment, three groups of first stirring members are specifically provided, and each group of first stirring members includes a first connecting rod 411, one end of the first connecting rod 411 is connected to the rotating shaft 310, and the other end of the first connecting rod 411 is provided with an inner guide flap 412. By providing the first connecting rod 411, it is convenient to install and connect the inner guide flap 412. The side of the inner guide flap 412 away from the first connecting rod 411 is inclined relative to the rotation direction of the rotating shaft 310. Looking down at the rotating shaft 310, the rotation direction of the rotating shaft 310 is counterclockwise, so that the inner guide flap 412 is tilted relative to the rotation direction of the rotating shaft 310. When stirring the material, the plate 412 can push the material from the side of the drying bin 200 close to the outer ring to the side of the drying bin 200 close to the inner ring. The upper part of the inner guide flap 412 is tilted downward in the opposite direction to the rotation direction of the rotating shaft 310, so that when the inner guide flap 412 stirs the material, while pushing the material from the side of the drying bin 200 close to the outer ring to the side of the drying bin 200 close to the inner ring, some of the material can be pushed from the bottom of the inner guide flap 412 to the top and over the top, thereby turning the material and increasing the residence time of the material in the drying bin 200 to achieve a better drying effect. It should be noted that in this embodiment, the number of first stirring members included in the inner guide stirring mechanism can be selected according to actual needs.

[0055] In this embodiment, the inner guide stirring mechanism includes three groups of first stirring members, and the first connecting rods 411 of the three groups of first stirring members are arranged at equal angles along the rotating shaft 310. The lengths of the multiple first connecting rods 411 are shortened in sequence from the longest one in the opposite direction of the rotating shaft 310. When the material is turned over and stirred by the inner guide stirring mechanism, the material entering the drying bin 200 of this layer is first pushed and stirred by the inner guide flap 412 on the first connecting rod 411 with the longest length. After being pushed, part of the material can move from the bottom of the inner guide flap 412 to the top and over the top, thereby realizing the turning of the material and increasing the retention time of the material in the drying bin 200. , to achieve a better drying effect, the remaining part of the material is pushed by the inner guide flap 412 from the side of the drying bin 200 close to the outer ring to the side of the drying bin 200 close to the inner ring, and the material leaks out from the side of the inner guide flap 412 connected to the first connecting rod 411. As the rotating shaft 310 rotates, it is pushed and stirred by the inner guide flap 412 on the first connecting rod 411 with a shorter length to the side of the drying bin 200 closer to the inner ring, and finally is pushed and stirred by the inner guide flap 412 on the first connecting rod 411 with the shortest length in the drying bin 200 of this layer, and falls from the dropping port 210 into the drying bin 200 of the next layer.

[0056] In this embodiment, the distance along which the multiple first connecting rods 411 gradually shorten along the rotation direction of the rotating shaft 310 is the difference between the distance between the side of the bottom of the inner guide flap 412 away from the rotating shaft 310 and the rotating shaft 310 and the distance between the side of the bottom of the inner guide flap 412 close to the rotating shaft 310 and the rotating shaft 310. The rotation direction of the rotating shaft 310 is counterclockwise, and the lengths between the multiple first connecting rods 411 are set as above, which can ensure that the pushed material can leave the inner guide flap 412 and be pushed by the next inner guide flap 412.

[0057] In this embodiment, the outer guide stirring mechanism includes at least one group of second stirring members. In this embodiment, three groups of second stirring members are specifically provided. Each group of second stirring members includes a second connecting rod 511. One end of the second connecting rod 511 is connected to the rotating shaft 310. The other end of the second connecting rod 511 is provided with an outer guide flap 512. By providing the second connecting rod 511, it is convenient to install and connect the outer guide flap 512. The side of the outer guide flap 512 away from the second connecting rod 511 is inclined in the opposite direction to the rotation direction of the rotating shaft 310. Looking down at the rotating shaft 310, the rotation direction of the rotating shaft 310 is counterclockwise, so that the outer guide flap 512 can move the material when stirring the material. Pushing from the inner ring side of the drying bin 200 to the outer ring side of the drying bin 200, the upper part of the outer guide flap 512 is tilted downward in the opposite direction to the rotation direction of the rotating shaft 310, so that when the outer guide flap 512 stirs the material, while pushing the material from the inner ring side of the drying bin 200 to the outer ring side of the drying bin 200, some of the material can be pushed from the bottom of the outer guide flap 512 to the top and over the top, thereby turning the material and increasing the residence time of the material in the drying bin 200 to achieve a better drying effect. It should be noted that in this embodiment, the number of second stirring members included in the outer guide stirring mechanism can be selected according to actual needs.

[0058] In this embodiment, the outer guide stirring mechanism includes three groups of second stirring members, and the second connecting rods 511 of the multiple groups of second stirring members are arranged at equal angles along the rotating shaft 310. The lengths of the multiple second connecting rods 511 gradually shorten along the rotating direction of the rotating shaft 310 from the longest one. When the material is turned over and stirred by the outer guide stirring mechanism, the material entering the drying bin 200 of this layer is first pushed and stirred by the outer guide flap 512 on the second connecting rod 511 with the shortest length. After being pushed, part of the material can be moved from the bottom of the outer guide flap 512 to the top and over the top, thereby realizing the turning of the material and increasing the retention time of the material in the drying bin 200. To achieve a better drying effect, the remaining part of the material is pushed by the outer guide flap 512 from the inner ring side of the drying bin 200 to the outer ring side of the drying bin 200, and the material leaks out from the side of the outer guide flap 512 away from the second connecting rod 511 connected to the second connecting rod 511. As the rotating shaft 310 rotates, it is pushed and stirred by the outer guide flap 512 on the second connecting rod 511 with a longer length to the side closer to the outer ring of the drying bin 200, and finally pushed and stirred by the outer guide flap 512 on the second connecting rod 511 which is closest to the blanking port 210 of the drying bin 200 of this layer, that is, the longest in this layer of drying bin 200, and falls from the blanking port 210 into the drying bin 200 of the next layer.

[0059] In this embodiment, the distance along which the multiple second connecting rods 511 gradually shorten along the rotation direction of the rotating shaft 310 is the difference between the distance between the side of the bottom of the outer guide flap 512 away from the rotating shaft 310 and the rotating shaft 310 and the distance between the side of the bottom of the outer guide flap 512 close to the rotating shaft 310 and the rotating shaft 310. The rotation direction of the rotating shaft 310 is counterclockwise. The lengths between the multiple second connecting rods 511 are set as above, which can ensure that the pushed material can leave the outer guide flap 512 and be pushed by the next outer guide flap 512.

[0060] Example 3

[0061] See also Fig.13 and Fig.14 The multi-layer grain dryer described in this embodiment is a further technical solution of the above-mentioned embodiment 2, and the difference is that: in this embodiment, a material guide pipe 220 extending toward the bottom direction is provided on the material drop opening 210 opened in each drying bin 200. In this embodiment, by providing the material guide pipe 220, the material falling from each drying layer to the next layer can be guided. It should be noted that in this embodiment, the length and extension direction of the material guide pipe 220 can be selected according to actual needs. The length of the material guide pipe 220 is set above the inner guide flap 412 and the outer guide flap 512. When the material is stirred and turned, it is difficult for the hot air in the drying chamber 100 to enter the adjacent drying bin 200 through the material drop opening 210, thereby further improving the drying effect of the material.

[0062] Example 4

[0063] See also Fig.15The multi-layer grain dryer described in this embodiment is a further technical solution of the above-mentioned embodiment 3, and the difference is that: in this embodiment, a guide part 230 is provided at the bottom of each drying bin 200, and the guide part 230 is to set the two sides of the bottom of the drying bin 200 as the bottom surface with a height difference, so as to form a slope with a certain slope on both sides, or to install a bottom plate with a height difference on both sides and a shape adapted to the bottom of the drying bin 200 at the bottom of the drying bin 200. By adopting the guide part 230, during the use of this product, hot air is input into the drying chamber 100, and the hot air is discharged from the drying chamber 100. When the air flows from the bottom to the top to heat and dry the material, the moisture in the material is heated and becomes water vapor and is taken away by the hot air. Since the temperature of the dried material itself is lower than the temperature of the hot air, the temperature of the bottom of the drying bin 200 that is in direct contact with the material is also lower than the temperature of the hot air. After the water vapor flowing with the hot air encounters the guide part 230 at the bottom of the drying bin 200, it will condense on the guide part 230 to form condensed water due to the lowering of the temperature when it encounters the cold. Since there is a height difference on both sides of the guide part 230, that is, it has a certain slope, the condensed water adsorbed on the guide part 230 will flow from the relatively high side to the low side. Flow, or flow from the side with smaller thickness to the side with larger thickness, so as to form the effect of guiding the condensed water. It should be noted that in this embodiment, there is no restriction on the height difference, thickness difference or slope on both sides of the guide part 230, which can be selected according to actual needs. The side wall of the drying chamber 100 at the bottom of each layer of the drying bin 200 is provided with a guide member 310 that matches the guide part 230 at the bottom of the drying bin 200. The guide member 310 is installed on the side close to the guide part 230 in the drying chamber 100 to which the condensed water will flow. The condensed water on the guide part 230 can flow directly to the guide member 310. The drying chamber 100 is provided with a pipe 900 which is connected to the outside of the drying chamber 100 and cooperates with the drainage member 310. The pipe 900 is used to discharge the condensed water in the drainage member 310 to the outside of the drying chamber 100. It should be noted that the drainage member 310 is not limited to the structural form of the drainage member 310 in this embodiment. The drainage member 310 can be a storage tank or a collection tank for temporarily storing condensed water, or a drainage plate with one end adjacent to or against the side of the guide part 230 where the condensed water drips, and the other end against or connected to the pipe 900. In order to achieve a better drainage effect, a drainage plate with a concave middle portion can also be used as needed.The hot air in the drying chamber 100 flows from bottom to top. During this process, the hot air heats and dries the materials in the drying bin 200 from the bottom of the drying chamber 100 to the top thereof in turn. The temperature of the hot air decreases gradually, and the temperature of the materials in the drying bin 200 and the drying bin 200 also decreases gradually accordingly. The closer the hot air is to the top of the drying chamber 100, the easier it is for the water vapor therein to condense into condensed water when it encounters the guide part 230 at the bottom of the drying bin 200, which can remove the moisture in the hot air to the greatest extent and achieve a better drying effect. Finally, the hot air is discharged from the top of the drying chamber 100 and enters the heating device to be heated again, and then enters the drying chamber 100 to realize the internal circulation of heating. It should be noted that in this embodiment, there is no restriction on the form of the pipeline 900, which can be selected according to actual needs, such as directly opening a pipeline 900 connected to multiple guide members 310 respectively on the drying chamber 100; or in each A corresponding pipe 900 is provided on the side wall of the drying chamber 100 corresponding to each drainage member 310, and the pipe 900 is connected to the drainage pipe to discharge the condensed water. The pipe 900 can be closed or opened according to the needs during use. When it is not necessary to discharge the condensed water, the pipe 900 can be sealed with a plug to prevent the hot air in the drying chamber 100 from being discharged and reducing the drying effect. When it is necessary to discharge the condensed water, the plug can be removed to discharge the condensed water. Alternatively, a "U"-shaped drainage pipe is connected to the pipe 900, and the height of the end of the "U"-shaped drainage pipe not connected to the pipe 900 is lower than the height of the end connected to the pipe 900. The condensed water in the "U"-shaped drainage pipe forms a blockage at its corner to ensure that the drying chamber 100 is a closed environment. As the condensed water in the "U"-shaped drainage pipe continues to increase, excess condensed water will automatically be discharged from the end of the "U"-shaped drainage pipe not connected to the pipe 900.

[0064] Example 5

[0065] The multi-layer grain dryer described in this embodiment is a further technical solution of the above-mentioned embodiment 3, and the difference is that: in this embodiment, a drainage piece 310 is provided on the side wall of the drying chamber 100 at the bottom of each layer of the drying bin 200, and a pipe 900 connected to the outside of the drying chamber 100 and cooperating with the drainage piece 310 is provided. When the embodiment is in use, the side of the overall structure of the product described in this embodiment away from the drainage piece 310 is padded or raised to form a height difference between the two sides of the bottom of the drying bin 200. After the hot air meets the bottom of the drying bin 200, part of the water vapor therein will form condensed water adsorbed on the drying bin 20 0 bottom, due to the height difference between the two sides of the bottom of the drying bin 200, the condensed water will flow along the bottom of the drying bin 200 from the high side to the low side, and then flow to the drainage member 310, and then be discharged to the outside of the drying chamber 100 through the pipe 900. It should be noted that the present embodiment does not limit the structural form of the drainage member 310. The drainage member 310 can be a storage tank or a collection tank for temporarily storing condensed water, or a drainage plate with one end adjacent to or against the guide portion 230 and the other end against or connected to the pipe 900. In order to achieve a better drainage effect, a drainage plate with a concave middle portion can also be used as needed.

[0066] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multi-layer grain dryer, comprising a drying chamber, wherein the drying chamber is provided with a feed inlet and a discharge inlet, wherein the feed inlet is located at the top of the drying chamber, and wherein: At least two layers of drying bins are provided in the drying chamber from top to bottom, and a material drop opening is provided on each layer of the drying bins. The material drop openings of two adjacent layers of the drying bins are respectively arranged opposite to each other on the inner ring side and the outer ring side thereof, and the material feed opening provided on the top of the drying chamber is located on the inner ring side or the outer ring side of the top of the drying chamber, and the material drop opening of the uppermost drying bin adjacent to the top of the drying chamber is located on the outer ring side or the inner ring side opposite to the material feed opening provided on the top of the drying chamber; The driving mechanism includes a rotating shaft, which extends from the bottom of the drying chamber to the top of the drying chamber and passes through each layer of the drying bin. The rotating shaft in the drying bin with a drop-out opening on the inner ring side is provided with an inner guide stirring mechanism, and the rotating shaft in the drying bin with a drop-out opening on the outer ring side is provided with an outer guide stirring mechanism.

2. A multi-layer grain drying machine according to claim 1, characterized in that: The inner guide stirring mechanism includes at least one group of first stirring members, each group of first stirring members includes a first connecting rod, one end of the first connecting rod is connected to the rotating shaft, and the other end of the first connecting rod is provided with an inner guide flap, and the side of the inner guide flap away from the first connecting rod is inclined relative to the rotation direction of the rotating shaft, and the upper part of the inner guide flap is inclined downward in the opposite direction to the rotation direction of the rotating shaft.

3. A multi-layer grain drying machine according to claim 2, characterized in that: The inner guide stirring mechanism comprises a plurality of groups of first stirring members, wherein the first connecting rods of the plurality of groups of first stirring members are arranged at equal angles along the rotating shaft, and the lengths of the plurality of first connecting rods gradually shorten from the longest one in the opposite direction of rotation of the rotating shaft.

4. A multi-layer grain drying machine according to claim 3, characterized in that: The gradually shortened distance of the multiple first connecting rods along the rotation direction of the shaft is the difference between the distance between the side of the bottom of the inner guide flap away from the shaft and the shaft and the distance between the side of the bottom of the inner guide flap close to the shaft and the shaft.

5. A multi-layer grain drying machine according to claim 1, characterized in that: The external guide stirring mechanism includes at least one group of second stirring members, each group of second stirring members includes a second connecting rod, one end of the second connecting rod is connected to the rotating shaft, and the other end of the second connecting rod is provided with an external guide flap, and the side of the external guide flap away from the second connecting rod is inclined opposite to the rotation direction of the rotating shaft, and the upper part of the external guide flap is inclined downward in the opposite direction to the rotation direction of the rotating shaft.

6. A multi-layer grain drying machine according to claim 5, characterized in that: The outer guide stirring mechanism comprises a plurality of groups of second stirring members, the second connecting rods of the plurality of groups of second stirring members are arranged at equal angles along the rotating shaft, and the lengths of the plurality of second connecting rods decrease in sequence from the longest one along the rotating direction of the rotating shaft.

7. A multi-layer grain drying machine according to claim 6, characterized in that: The gradually shortened distance of the plurality of second connecting rods along the rotation direction of the shaft is the difference between the distance from the side of the bottom of the outer guide flap away from the shaft to the shaft and the distance from the side of the bottom of the outer guide flap close to the shaft to the shaft.

8. A multi-layer grain drying machine according to claim 1, characterized in that: Each layer of drying bin is connected to the inner side of the drying room.

9. A multi-layer grain drying machine according to claim 1, characterized in that: In two adjacent layers of drying bins, one side of one layer of the drying bins is connected to one side of the interior of the drying chamber, and a first air duct is formed between the other side of the drying bin on this layer and the other side of the interior of the drying chamber; the other side of the other layer of the drying bins is connected to the other side of the interior of the drying chamber, and a second air duct is formed between one side of the drying bin on this layer and one side of the interior of the drying chamber, and a third air duct is opened between adjacent layers of the two adjacent layers of drying bins.

10. The multi-layer grain drying machine according to claim 1, characterized in that: A guide part is provided at the bottom of each drying bin, and a guide piece matching with the guide part at the bottom of the drying bin is provided on the side wall of the drying chamber at the bottom of each drying bin. The drying chamber is provided with a pipe connected with the outside and matching with the guide piece.

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