Hot air grain dryer

Abstract

The utility model discloses a hot air grain drying machine, and relates to the technical field of grain drying. A motor is fixedly connected to one side of the heat preservation cover, the output end of the motor penetrates through the end face of the heat preservation cover and extends into an inner cavity of the heat preservation cover, a heating structure is fixedly connected to one side of the upper end of the heat preservation cover, a rotating groove is formed in the middle of the heat preservation cover, and a driving structure is arranged in an inner cavity of the rotating groove and used for driving grains to rotate and comprises a supporting rod. Through the cooperation of the heat preservation cover and the heating structure, waste gas in the inner cavity of the heat preservation cover can be absorbed through the heating structure, then air sucked by the heating structure is preliminarily heated through the waste gas, and therefore the time and energy needed by the heating structure for heating the air can be shortened; through cooperation of the motor and the driving structure, grains in the inner cavity of the grain cage structure can be heated more uniformly, and the situation that the grains are caked in the drying process, and consequently the drying quality is affected is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of grain drying, in particular to a hot air grain dryer. Background Art

[0002] Grain drying is a core link in agricultural production and is crucial for maintaining the quality and storage of grains after harvest. In traditional agricultural practices, grain drying mainly relies on natural drying or simple hot air drying equipment. However, the natural drying method is directly affected by weather conditions, such as rainy days, cloudy days or winter, which will affect the drying process and effect; in addition, traditional hot air drying equipment usually uses a single hot air temperature and wind speed, which cannot be accurately adjusted according to the characteristics of the grain and drying requirements, resulting in high energy consumption, low drying efficiency, and uneven drying effect, which in turn affects the quality and storage time of the grain.

[0003] With the advancement of agricultural modernization and the continuous progress of agricultural production technology, the demand for efficient, energy-saving and environmentally friendly grain drying equipment is becoming more and more urgent. As an advanced grain drying technology, hot air grain dryer has gradually attracted attention and application. This dryer adopts advanced hot air technology to achieve efficient and uniform drying of grains, while also effectively reducing energy consumption and reducing environmental pollution.

[0004] Chinese patent document CN104154725B discloses a hot air rotary grain dryer, including a support, a driving wheel is arranged on the support, the driving wheel is arranged along an arc, a drying cylinder is placed on the driving wheel, an air supply inner cylinder is arranged in the drying cylinder, the air supply inner cylinder is fixed to the drying cylinder through a bracket, one end of the air supply inner cylinder is an air inlet, the other end is sealed, and a plurality of ventilation holes are arranged on the air supply inner cylinder, an electric heating coil and a blower motor are arranged at the air inlet end of the air supply inner cylinder, and the electric heating coil is arranged between the air inlet end and the blower motor; however, there are still the following defects in the implementation process:

[0005] Although the device in the above document can avoid the defects of uneven ventilation of grains and seeds, uneven drying parts and poor effect in the traditional drying method, the device in the above document cannot recycle the hot air in the device, thereby reducing the energy required for the device to heat the air. The device in the above document cannot filter out some dust and other impurities in the grains, thereby improving the quality of the grains. The device in the above document cannot perform targeted heating according to grains of different humidity levels, thereby avoiding the phenomenon that some grains are over-dried and some grains are not dried during the drying process. Summary of the invention

[0006] The purpose of the utility model is to provide a hot air grain dryer to solve the problems raised in the above background technology.

[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0008] A hot air grain dryer comprises a heat preservation cover; a motor is fixedly connected to one side of the heat preservation cover, and the output end of the motor passes through the end surface of the heat preservation cover and extends into the inner cavity of the heat preservation cover; a heating structure is fixedly connected to one side of the upper end of the heat preservation cover; a rotating groove is provided in the middle of the heat preservation cover; a driving structure is provided in the inner cavity of the rotating groove; the driving structure is used to drive the grain to rotate; the driving structure comprises support rods; a grain cage structure is slidably connected to the outer surfaces of the support rods; a support frame structure is provided on one side of the inner cavity of the rotating groove; the support frame structure is used to limit the position of the grain cage structure.

[0009] A further improvement of the technical solution of the utility model is that an air outlet groove penetrating through the outer surface of the heat preservation cover and extending to the inner cavity of the heat preservation cover is provided on one side of the upper part of the heat preservation cover, a slide groove is provided at the lower part of the heat preservation cover, and a dust box is slidably connected to the inner cavity of the slide groove.

[0010] By adopting the above technical scheme, through the cooperation of the slide and the dust box, the dust box can be used to collect some dust and other impurities on the surface of the grains during the process of drying the grains by the device, thereby effectively reducing the impact of impurities on the environment and improving the hygiene standards of the grains during the drying process.

[0011] A further improvement of the technical solution of the utility model is that the dust collecting box is symmetrically fixedly connected with a sliding block, and the sliding block is T-shaped.

[0012] The above technical solution is adopted, in which the dust collecting box is supported by a slider, and the position of the dust collecting box is limited by the slider, so as to ensure that the dust collecting box will not be displaced or vibrated during operation.

[0013] A further improvement of the technical solution of the utility model is that the heating structure includes a heater body, the lower end of the heater body is fixedly connected to the upper end of the insulation cover, the input end of the heater body is fixedly connected to an air inlet pipe 2, one side of the air inlet pipe 2 is provided with an air inlet groove that penetrates the outer surface of the air inlet pipe 2 and extends to the inner cavity of the air inlet pipe 2, the end of the air inlet pipe 2 away from the heater body is fixedly connected to an air inlet pipe 1, the outer surface of the air inlet pipe 1 is fixedly connected to the inner cavity of the air outlet groove, and the output end of the heater body is fixedly connected to an air outlet pipe 1.

[0014] The above-mentioned technical scheme is adopted, in which the air inlet pipe one and the air outlet groove are cooperated, so that some exhaust gas in the inner cavity of the insulation cover can be transported to the inner cavity of the air inlet pipe two by using the air inlet pipe one, and then transported to the inner cavity of the heater body together with the air transported to the inner cavity of the air inlet pipe two from the inner cavity of the air inlet groove for reheating. During the transportation process, these exhaust gases can heat the air for the first time, thereby increasing the temperature of the air, and then can reduce the time and energy required for the heater body to heat the air.

[0015] The further improvement of the technical solution of the utility model is that the driving structure includes a main disk, the side of the main disk close to the motor is fixedly connected to the output end of the motor, and the main disk is fixedly connected to a plurality of support rods. The outer surface of the main disk is rotatably connected to a connecting ring block 1, the connecting ring block 1 is fixedly connected to the inner cavity of the rotating groove, the ends of the support rods away from the main disk are fixedly connected to threaded rods 1, the outer surfaces of the threaded rods 1 are threadedly connected to nuts, the middle part of the side of the main disk away from the motor is fixedly connected to an air outlet pipe 2, and the outer surface of the air outlet pipe 1 is rotatably connected to the inner cavity of the air outlet pipe 2.

[0016] The above-mentioned technical scheme is adopted, in which the main disk is driven to rotate by the output end of the motor, so that the main disk can be used to drive a number of support rods and a grain cage structure to rotate, so that the grains placed in the inner cavity of the grain cage structure can be heated more evenly, and the grains can be prevented from agglomerating during the drying process, thereby affecting the drying quality. At the same time, when the grains are driven to rotate, some dust and other impurities on the surface of the grains can be separated from the grains. Through the cooperation of the air outlet pipe 1 and the air outlet pipe 2, the hot air can be transported to the inner cavity of the air outlet pipe 2 through the air outlet pipe 1, and then transported to the device through a number of air holes opened on the air outlet pipe 2 to dry the grains.

[0017] A further improvement of the technical solution of the utility model is that the support frame structure includes a sub-disc, the outer surface of the sub-disc is rotatably connected with a connecting ring block 2, the connecting ring block 2 is fixedly connected to the inner cavity of the rotating groove, a plurality of limit grooves are opened in an annular array in the middle of the sub-disc, a connecting groove is opened in the middle of the sub-disc, and the outer surface of the second outlet pipe is fixedly connected to the inner cavity of the connecting groove.

[0018] By adopting the above technical solution, a plurality of grain cage structures can be supported through the cooperation of the auxiliary plate and a plurality of limit grooves, thereby reducing the weight borne by a plurality of support rods and allowing the weight of the grain cage structure to be evenly distributed on the device.

[0019] A further improvement of the technical solution of the utility model is that the valley cage structure includes a rolling cage, the inner cavity of the rolling cage is slidably connected to the outer surface of the support rod with the same center, a plurality of threaded rods 2 are threadedly connected in an annular array on one side of the rolling cage, and a baffle is threadedly connected on the outer surfaces of the plurality of threaded rods 2.

[0020] By adopting the above technical solution, the baffle and the rolling cage can be fixedly connected together through threaded rod 2, thereby preventing grains placed in the inner cavity of the rolling cage from escaping from the inner cavity of the rolling cage. By opening a plurality of filters on the outer surface of the rolling cage, the grains can be prevented from escaping from the inner cavity of the rolling cage when the device drives dust and other impurities on the grains to be separated from the grains.

[0021] Due to the adoption of the above technical solution, the utility model has achieved the following technical progress compared with the prior art:

[0022] 1. The utility model provides a hot air grain dryer. Through the cooperation of a heat preservation cover and a heating structure, the exhaust gas in the inner cavity of the heat preservation cover can be absorbed by the heating structure, and then the exhaust gas is used to preliminarily heat the air sucked by the heating structure, so that the time and energy required for the heating structure to heat the air can be shortened. Through the cooperation of a motor and a driving structure, the output end of the motor can be used to drive the driving structure to rotate, and then the driving structure can be used to drive a plurality of grain cage structures to rotate, so that the grain in the inner cavity of the grain cage structure can be heated more evenly, and the grain can be prevented from agglomerating during the drying process, thereby affecting the drying quality.

[0023] 2. The utility model provides a hot air grain dryer, which can place grains of different humidity in different roller cage cavities through the cooperation of a plurality of support rods and a plurality of grain cage structures, so that the drying time can be controlled according to the humidity of the grains. Through the cooperation of a chute and a dust box, some dust and other impurities on the grains can be collected by the dust box to prevent these impurities from affecting the surrounding environment and the grains, thereby improving the drying quality of the grains. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0026] Figure 2 It is a partial cross-sectional schematic diagram of the overall structure of the utility model;

[0027] Figure 3 It is a schematic diagram of the heat preservation cover of the utility model;

[0028] Figure 4 This is a schematic diagram of the dust collecting box of the utility model;

[0029] Figure 5 This is a schematic diagram of the heating structure of the utility model;

[0030] Figure 6 This is a schematic diagram of the driving structure of the utility model;

[0031] Figure 7 This is a schematic diagram of the support frame structure of the utility model;

[0032] Figure 8 This is a schematic diagram of the grain cage structure of the utility model;

[0033] In the figure: 1. Insulation cover; 11. Air outlet groove; 12. Rotating groove; 13. Slide groove; 14. Dust box; 141. Slider; 2. Motor; 3. Heating structure; 31. Heater body; 32. Inlet pipe one; 33. Inlet pipe two; 34. Inlet groove; 35. Outlet pipe one; 5. Driving structure; 51. Main plate; 52. Connecting ring block one; 53. Support rod; 54. Threaded rod one; 55. Nut; 56. Outlet pipe two; 6. Support frame structure; 61. Sub-plate; 62. Connecting ring block two; 63. Limiting groove; 64. Connecting groove; 7. Grain cage structure; 71. Rolling cage; 72. Baffle; 73. Threaded rod two. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below in conjunction with the embodiments:

[0035] Example 1

[0036] like Figure 1-8 As shown, the utility model provides a hot air grain dryer, including a heat preservation cover 1; a motor 2 is fixedly connected to one side of the heat preservation cover 1, and the output end of the motor 2 passes through the end surface of the heat preservation cover 1 and extends into the inner cavity of the heat preservation cover 1, a heating structure 3 is fixedly connected to one side of the upper end of the heat preservation cover 1, a rotating groove 12 is opened in the middle of the heat preservation cover 1, and a driving structure 5 is arranged in the inner cavity of the rotating groove 12, and the driving structure 5 is used to drive the grain to rotate, and the driving structure 5 includes support rods 53, and the outer surfaces of the support rods 53 are slidably connected to a grain cage structure 7, and a support frame structure 6 is arranged on one side of the inner cavity of the rotating groove 12, and the support frame structure 6 is used to limit the position of the grain cage structure 7.

[0037] In this embodiment, the hot air transported by the heating structure 3 to the inner cavity of the heat preservation cover 1 can be stored through the heat preservation cover 1 to prevent the hot air from dissipating, so that the hot air can dry the grains in the inner cavity of the grain cage structure 7. The motor 2 can drive the driving structure 5 to rotate, thereby driving the grain cage structure 7 and the grains in the inner cavity of the grain cage structure 7 to rotate, so that the grains in the inner cavity of the grain cage structure 7 can be heated more evenly. The surrounding air can be absorbed and heated by the heating structure 3, and then transported to the inner cavity of the heat preservation cover 1, so as to dry the grains. The driving structure 5 can support the grain cage structure 7 and drive the grain cage structure 7 to rotate. The support frame structure 6 can support the grain cage structure 7 and limit the position of the grain cage structure 7.

[0038] Example 2

[0039] like Figure 8As shown, on the basis of Example 1, the utility model provides a technical solution: preferably, the grain cage structure 7 includes a rolling cage 71, the inner cavity of the rolling cage 71 is slidably connected to the outer surface of the support rod 53 with the same center, and a plurality of threaded rods 73 are threadedly connected in an annular array on one side of the rolling cage 71, and a baffle 72 is threadedly connected on the outer surfaces of the plurality of threaded rods 73.

[0040] In this embodiment, a plurality of grain cage structures 7 are slid and removed from the outer surface of the support rod 53, and then a plurality of threaded rods 73 are rotated and removed from the rolling cage 71 and the baffle 72 to release the position restriction of the baffle 72. Then, grains with different humidity levels are placed in different cavities of the rolling cage 71. When the inner cavity of the rolling cage 71 is filled with grains, the position of the rolling cage 71 and the baffle 72 is restricted by the cooperation of the plurality of threaded rods 73.

[0041] Example 3

[0042] like Figure 5 , Figure 6 , Figure 7 As shown, on the basis of Example 2, the utility model provides a technical solution: preferably, the driving structure 5 includes a main disk 51, the side of the main disk 51 close to the motor 2 is fixedly connected to the output end of the motor 2, and the main disk 51 is fixedly connected to a plurality of support rods 53. The outer surface of the main disk 51 is rotatably connected with a connecting ring block 152, and the connecting ring block 152 is fixedly connected to the inner cavity of the rotating groove 12, and the ends of the support rods 53 away from the main disk 51 are fixedly connected with threaded rods 154, and the outer surfaces of the threaded rods 154 are threadedly connected with nuts 55, and the middle part of the side of the main disk 51 away from the motor 2 is fixedly connected with an air outlet pipe 256, and the outer surface of the air outlet pipe 153 is rotatably connected to the inner cavity of the air outlet pipe 256;

[0043] The heating structure 3 includes a heater body 31, the lower end of the heater body 31 is fixedly connected to the upper end of the insulation cover 1, the input end of the heater body 31 is fixedly connected to an air inlet pipe 2 33, one side of the air inlet pipe 2 33 is provided with an air inlet groove 34 that penetrates the outer surface of the air inlet pipe 2 33 and extends to the inner cavity of the air inlet pipe 2 33, the end of the air inlet pipe 2 33 away from the heater body 31 is fixedly connected to an air inlet pipe 1 32, the outer surface of the air inlet pipe 1 32 is fixedly connected to the inner cavity of the air outlet groove 11, and the output end of the heater body 31 is fixedly connected to an air outlet pipe 1 35, the support frame structure 6 includes a sub-disk 61, the outer surface of the sub-disk 61 is rotatably connected to a connecting ring block 2 62, the connecting ring block 2 62 is fixedly connected to the inner cavity of the rotating groove 12, a plurality of limit grooves 63 are provided in a circular array in the middle of the sub-disk 61, a connecting groove 64 is provided in the middle of the sub-disk 61, and the outer surface of the air outlet pipe 2 56 is fixedly connected to the inner cavity of the connecting groove 64.

[0044] In this embodiment, a plurality of grain cage structures 7 are then slid and pushed from the inner cavities of a plurality of limiting grooves 63 to the outer surface of the support rod 53 with the same center of a circle, and the grain cage structure 7 is supported by the support rod 53. Then, by rotating the nut 55, the threaded rod 1 54 and the nut 55 cooperate to fix the position of the grain cage structure 7. Then, the heater body 31 is used to absorb the air around the device through the air inlet groove 34, and then the air is transported to the inner cavity of the heater body 31, and the air is heated by the heater body 31. Then, the heated air is transported to the inner cavity of the air outlet pipe 2 56 through the air outlet pipe 1 35, and then the hot air will float in the inner cavity of the heat preservation cover 1 through a plurality of holes opened on the air outlet pipe 2 56, thereby heating and drying the grains in the inner cavity of the rolling cage 71.

[0045] Example 4

[0046] like Figure 3 and Figure 4 As shown, on the basis of Example 3, the utility model provides a technical solution: preferably, an air outlet groove 11 is provided on one side of the upper part of the heat preservation cover 1 and extends through the outer surface of the heat preservation cover 1 to the inner cavity of the heat preservation cover 1, and a slide groove 13 is provided on the lower part of the heat preservation cover 1, and the inner cavity of the slide groove 13 is slidably connected to a dust box 14, and the dust box 14 is symmetrically fixedly connected to a slider 141, and the slider 141 is T-shaped.

[0047] In this embodiment, at the same time, by running the motor 2, the main disk 51 is driven to rotate through the output end of the motor 2, and then the main disk 51 is used to drive the support rod 53 and the second air outlet pipe 56 to rotate. Since the second air outlet pipe 56 is fixedly connected to the connecting groove 64, when the second air outlet pipe 56 rotates, the support frame structure 6 is driven to rotate, and the grain cage structure 7 is driven to rotate through the driving structure 5, so that some dust on the surface of the grain in the inner cavity of the rolling cage 71 can be separated from the grain, and then the dust will fall into the inner cavity of the rotating groove 12, and then will be collected in the inner cavity of the dust box 14, so that it will be collected by the dust box 14. At the same time, through the cooperation of the air outlet groove 11 and the air inlet pipe 32, the heater body 31 can extract the exhaust gas in the inner cavity of the thermal insulation cover 1 and transport it to the inner cavity of the air inlet pipe 33, and then heat the air transported to the inner cavity of the air inlet pipe 33 by the air inlet groove 34. Then, the exhaust gas will be transported to the inner cavity of the heater body 31 together with the air to be heated again, and then transported back to the inner cavity of the thermal insulation cover 1 through the air outlet pipe 35. When the dust and other impurities in the inner cavity of the dust box 14 are collected to a certain amount, the staff can slide the dust box 14 out of the inner cavity of the slide groove 13, and then deal with the dust and other impurities.

[0048] The following is a detailed description of the working principle of the hot air grain dryer.

[0049] like Figure 1-8As shown, when it is necessary to dry the grains, firstly, the plurality of grain cage structures 7 are slid and removed from the outer surface of the support rod 53, and then the plurality of threaded rods 73 are rotated and removed from the rolling cage 71 and the baffle 72 to release the position restriction of the baffle 72, and then the grains with different humidity are placed in the inner cavities of different rolling cages 71. When the inner cavity of the rolling cage 71 is filled with grains, the positions of the rolling cage 71 and the baffle 72 are restricted by the cooperation of the plurality of threaded rods 73.

[0050] Then, the grain cage structures 7 are respectively slid from the inner cavities of the limiting grooves 63 and pushed to the outer surface of the support rod 53 with the same center of the circle, and the grain cage structures 7 are supported by the support rod 53. Then, by rotating the nut 55, the threaded rod 1 54 and the nut 55 cooperate to fix the position of the grain cage structure 7. Then, the heater body 31 is used to absorb the air around the device through the air inlet groove 34, and then the air is transported to the inner cavity of the heater body 31, and the air is heated by the heater body 31. Then, the heated air is transported to the inner cavity of the air outlet pipe 2 56 through the air outlet pipe 1 35, and then the hot air will float in the inner cavity of the heat preservation cover 1 through the several holes opened on the air outlet pipe 2 56, so as to heat and dry the grains in the inner cavity of the rolling cage 71.

[0051] At the same time, by running the motor 2, the main disk 51 is driven to rotate through the output end of the motor 2, and then the main disk 51 is used to drive the support rod 53 and the second air outlet pipe 56 to rotate. Since the second air outlet pipe 56 is fixedly connected to the connecting groove 64, when the second air outlet pipe 56 rotates, it will drive the support frame structure 6 to rotate, and drive the grain cage structure 7 to rotate through the driving structure 5, so that some dust on the surface of the grain in the inner cavity of the rolling cage 71 can be separated from the grain, and then the dust will fall into the inner cavity of the rotating groove 12, and then will be collected in the inner cavity of the dust box 14, so that it can be collected by the dust box 14. Through the cooperation of the air outlet groove 11 and the air inlet pipe 32, the heater body 31 can extract the exhaust gas in the inner cavity of the heat preservation cover 1 and transport it to the inner cavity of the air inlet pipe 33, and then heat the air transported to the inner cavity of the air inlet pipe 33 by the air inlet groove 34. Then, the exhaust gas will be transported to the inner cavity of the heater body 31 together with the air to be heated again, and then transported back to the inner cavity of the heat preservation cover 1 through the air outlet pipe 35. When the dust and other impurities in the inner cavity of the dust box 14 are collected to a certain amount, the staff can slide the dust box 14 out of the inner cavity of the slide groove 13, and then deal with the dust and other impurities.

[0052] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A hot air grain dryer, comprising a heat preservation cover (1); characterized in that: A motor (2) is fixedly connected to one side of the heat-insulating cover (1), and an output end of the motor (2) passes through the end surface of the heat-insulating cover (1) and extends into the inner cavity of the heat-insulating cover (1). A heating structure (3) is fixedly connected to one side of the upper end of the heat-insulating cover (1). A rotating groove (12) is provided in the middle of the heat-insulating cover (1). A driving structure (5) is provided in the inner cavity of the rotating groove (12). The driving structure (5) is used to drive the grains to rotate. The driving structure (5) includes support rods (53). The outer surfaces of a plurality of the support rods (53) are slidably connected to a grain cage structure (7). A support frame structure (6) is provided on one side of the inner cavity of the rotating groove (12). The support frame structure (6) is used to limit the position of the grain cage structure (7).

2. A hot air grain dryer according to claim 1, characterized in that: An air outlet groove (11) is provided on one side of the upper portion of the heat-insulating cover (1) and extends through the outer surface of the heat-insulating cover (1) to the inner cavity of the heat-insulating cover (1); a slide groove (13) is provided on the lower portion of the heat-insulating cover (1); and a dust collecting box (14) is slidably connected to the inner cavity of the slide groove (13).

3. A hot air grain dryer according to claim 2, characterized in that: The dust collecting box (14) is symmetrically fixedly connected with a slider (141), and the slider (141) is T-shaped.

4. A hot air grain dryer according to claim 2, characterized in that: The heating structure (3) comprises a heater body (31), the lower end of the heater body (31) is fixedly connected to the upper end of the heat preservation cover (1), the input end of the heater body (31) is fixedly connected to an air intake pipe (33), one side of the air intake pipe (33) is provided with an air intake groove (34) that penetrates the outer surface of the air intake pipe (33) and extends to the inner cavity of the air intake pipe (33), the end of the air intake pipe (33) away from the heater body (31) is fixedly connected to an air intake pipe (32), the outer surface of the air intake pipe (32) is fixedly connected to the inner cavity of the air outlet groove (11), and the output end of the heater body (31) is fixedly connected to an air outlet pipe (35).

5. A hot air grain dryer according to claim 4, characterized in that: The driving structure (5) comprises a main disk (51), wherein a side of the main disk (51) close to the motor (2) is fixedly connected to the output end of the motor (2), the main disk (51) is fixedly connected to a plurality of support rods (53), the outer surface of the main disk (51) is rotatably connected to a connecting ring block (52), the connecting ring block (52) is fixedly connected to the inner cavity of the rotating groove (12), the ends of the support rods (53) away from the main disk (51) are fixedly connected to threaded rods (54), the outer surfaces of the threaded rods (54) are threadedly connected to nuts (55), the middle part of the side of the main disk (51) away from the motor (2) is fixedly connected to an air outlet pipe (56), and the outer surface of the air outlet pipe (55) is rotatably connected to the inner cavity of the air outlet pipe (56).

6. A hot air grain dryer according to claim 5, characterized in that: The support frame structure (6) comprises a sub-disk (61), the outer surface of the sub-disk (61) is rotatably connected to a second connecting ring block (62), the second connecting ring block (62) is fixedly connected to the inner cavity of the rotating groove (12), a plurality of limit grooves (63) are provided in a circular array in the middle of the sub-disk (61), a connecting groove (64) is provided in the middle of the sub-disk (61), and the outer surface of the second outlet pipe (56) is fixedly connected to the inner cavity of the connecting groove (64).

7. A hot air grain dryer according to claim 5, characterized in that: The grain cage structure (7) comprises a rolling cage (71), the inner cavity of the rolling cage (71) is slidably connected to the outer surface of the support rod (53) with the same center, a plurality of threaded rods (73) are threadedly connected in an annular array on one side of the rolling cage (71), and a baffle (72) is threadedly connected on the outer surfaces of the plurality of threaded rods (73).

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