Grain drying equipment with multi-stage drying function

Abstract

The invention provides multi-stage drying grain drying equipment, and belongs to the field of grain drying equipment, the multi-stage drying grain drying equipment comprises a second-stage drying box, the left side of the top of the second-stage drying box is fixedly connected with an inclined frame, and the right side of the top of the second-stage drying box is fixedly connected with a feeding frame; and the discharging assembly comprises two connecting rods which are fixedly connected to the upper side and the lower side in the inclined frame correspondingly, and the same lead screw is rotationally connected between the two connecting rods. Through the arrangement of the discharging assembly and the spreading assembly, to-be-dried grains can be tidily laid in the first-stage drying frame, the to-be-dried grains make full contact with the heating base to be heated and dried, then the first-stage drying frame is inclined, and the primarily-dried grains enter the second-stage drying box from the feeding frame to be secondarily dried; and through uniform laying, sufficient drying of the grain particles is guaranteed, and the drying effect and the drying uniformity are improved.

Description

Technical Field

[0001] The invention relates to the technical field of grain drying equipment, in particular to a multi-stage drying grain drying equipment. Background Art

[0002] The grain drying method is to give the grain a certain form of energy through the drying medium, so that part of the water in the grain evaporates and overflows. The basic condition for achieving the drying process is the transfer, conversion and consumption of energy. Before the grain is stored, a drying equipment is needed to dry the grain.

[0003] Existing small-scale grain drying equipment often only has one stage of grain drying treatment, which is to dry the grain by direct contact between the heat source and the grain. During the drying process, the grains are often stacked together, resulting in limited contact between some grains and the heat source, and the drying effect is limited. The stacked grains are also prone to making it difficult to discharge evaporated water vapor, resulting in the grain still having a lot of moisture after drying. These problems have limited the drying effect of current small-scale grain drying equipment.

[0004] Therefore, we propose a multi-stage drying grain drying equipment to solve the above problems. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a multi-stage drying grain drying device to solve the problems raised in the above background technology.

[0006] The object of the present invention can be achieved by the following technical solution: comprising a secondary drying box, wherein an inclined frame is fixedly connected to the left side of the top of the secondary drying box, and a feed frame is fixedly connected to the right side of the top of the secondary drying box;

[0007] A material discharge assembly, the material discharge assembly comprises two connecting rods respectively fixedly connected to the upper and lower sides of the inclined frame, a same screw rod is rotatably connected between the two connecting rods, a material discharge motor is fixedly connected to the top of the upper connecting rod of the two connecting rods, an output end of the material discharge motor is fixedly connected to an adjacent end of the screw rod, an external thread of the screw rod is connected to a moving rod, the moving rod is slidably connected in the inclined frame, one side of the moving rod is rotatably connected to a support rod, a heating base is rotatably connected to the inclined frame, and one end of the support rod is rotatably connected to one side of the bottom of the heating base;

[0008] A material spreading component, the material spreading component includes a primary drying frame fixedly connected to the top of the heating base, the front and rear sides of the primary drying frame are respectively provided with a first slide groove, a second slide groove and a third slide groove from top to bottom, the two first slide grooves are movably connected with moving rollers, the outer sides of the moving rollers are provided with double spiral grooves, the two ends of the moving rollers are fixedly connected with a first pinion gear, the two second slide grooves are respectively movably connected with left-right symmetrical moving rods, the outer sides of the two ends of the two moving rods are respectively provided with tripods, the tripods are also sleeved on the outer sides of one end of the moving roller, the tripod is fixedly connected with an extension frame, one of the extension frames is fixedly connected with a material spreading motor, and the sides of the extension frames close to each other are rotatably connected with The first large gear, the output end of the material laying motor is fixedly connected to one side of the adjacent first large gear, a flattening roller is arranged in the third slide groove, and the same fixed rod is respectively sleeved between the two ends of the flattening roller and the two ends of the moving roller, the lower sides of the front and rear sides of the primary drying frame are fixedly connected with racks, the first large gear is respectively meshed with the adjacent first small gear and the adjacent rack, the middle part of the outer sides of the two movable rods is slidably connected with the same laying frame, one side of the laying frame is fixedly connected with a feed block, the top of the feed block is connected with a feed hose, the bottom of the feed block is fixedly connected with a discharge valve, the top of the laying frame is fixedly connected with a guide rod, and the end of the guide rod is movably connected to the inner side of the double spiral groove.

[0009] As a preferred embodiment of the present invention, it also includes a secondary drying component, which includes a large rotating drum rotatably connected to the secondary drying box, a plurality of cavities distributed in a circle are opened in the large rotating drum, a closing plate is fixedly connected to the front side of the cavity, a stirring rod is rotatably connected between one side of the closing plate and the inner wall of the cavity, a second gear is fixedly connected to the front end of the stirring rod, a stirring blade is fixedly connected to the outer side of the stirring rod, a closed circular plate is fixedly connected to the front side of the secondary drying box, a stirring motor is fixedly connected to the closed circular plate, a rotating disk is fixedly connected to the output end of the stirring motor, a single tooth is fixedly connected to the outer side of the rotating disk, a rotating shaft is rotatably connected between the front end of the large rotating drum and the closed circular plate, a plum blossom disk is fixedly connected to the outer side of the rotating shaft, a gear ring is fixedly connected to the rear side of the closed circular plate, and the gear ring is meshed with a plurality of second gears.

[0010] As a preferred embodiment of the present invention, a plurality of tooth grooves are distributed in a circumferential manner on the plum blossom disk, and an arc groove is provided between two adjacent tooth grooves.

[0011] As a preferred embodiment of the present invention, the arc surface profile of the arc-shaped groove is matched with the outer profile of the rotating disk, and the tooth groove is matched with the single tooth.

[0012] As a preferred embodiment of the present invention, a notch is provided on the inner wall of the cavity, wherein when the plane formed by the central axis of the stirring rod and the rotating shaft is perpendicular to the ground, the notch in the uppermost cavity is directly above the cavity, and the notch in the lowermost cavity is directly below the cavity.

[0013] As a preferred embodiment of the present invention, an arc frame is fixedly connected to the top of the feed frame, and the right end of the primary drying frame is configured as an arc surface adapted to the adjacent side of the arc frame.

[0014] As a preferred embodiment of the present invention, the bottom of the secondary drying box is fixedly connected with supporting legs, and a material discharge chute is provided in the middle of the bottom of the secondary drying box.

[0015] As a preferred embodiment of the present invention, the rear side of the secondary drying box is evenly distributed with first air holes, and the rear inner wall of the cavity is evenly distributed with second air holes.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. By setting the discharge component and the spreading component, the grain to be dried can be neatly spread in the primary drying frame, so that the grain to be dried can fully contact the heating base and be heated and dried. Then, by tilting the primary drying frame, the grain that has been dried once is passed from the feed frame into the secondary drying box for secondary drying. The uniform spreading ensures the full drying of the grain particles and improves the drying effect and the drying uniformity.

[0018] 2. The secondary drying component can be set up to stir and turn the grain after drying, so that the evaporated high-temperature water is completely separated from the grain particles and discharged out of the cavity through the pores, avoiding the dry water in the grain after drying adhering to the surface of the grain particles, further improving the drying effect of the grain particles, and turning the grain over in groups also reduces the amount of grain turned over at a single time, which is beneficial to reduce grain accumulation and assist in improving the effect of discharging water vapor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0021] Figure 2 It is a schematic diagram of the three-dimensional structure from another viewing angle of the present invention;

[0022] Figure 3 It is a partial structural schematic diagram of the present invention;

[0023] Figure 4It is a schematic diagram of the three-dimensional structure of the closed circular plate and the gear ring in the present invention;

[0024] Figure 5 yes Figure 2 An enlarged schematic diagram of part A is shown;

[0025] Figure 6 yes Figure 2 An enlarged schematic diagram of part B is shown;

[0026] Figure 7 yes Figure 3 An enlarged schematic diagram of part C is shown.

[0027] In the figure: 1. Secondary drying box; 2. Slant frame; 3. Feed frame; 4. Connecting rod; 5. Screw rod; 6. Feeding motor; 7. Moving rod; 8. Support rod; 9. Heating base; 10. Primary drying frame; 11. First chute; 12. Second chute; 13. Third chute; 14. Moving roller; 15. Double spiral groove; 16. First small gear; 17. Movable rod; 18. Tripod; 19. Extension frame; 20. Paving motor; 21. First large gear; 22. Paving roller; 23. Fixed rod; 24, rack; 25, laying frame; 26, feed block; 27, feed hose; 28, discharge valve; 29, guide rod; 30, large drum; 31, cavity; 32, closing plate; 33, stirring rod; 34, second gear; 35, stirring blade; 36, closed circular plate; 37, stirring motor; 38, rotating disk; 39, single tooth; 40, rotating shaft; 41, plum blossom disk; 42, gear ring; 43, tooth groove; 44, arc groove; 45, arc frame; 46, support leg. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figure 1-Figure 7 As shown, a multi-stage drying grain drying device comprises a secondary drying box 1, an inclined frame 2 is fixedly connected to the left side of the top of the secondary drying box 1, a feed frame 3 is fixedly connected to the right side of the top of the secondary drying box 1, the feed frame 3 is connected to the inside of the secondary drying box 1, and a feed slot is opened on the secondary drying box 1 at a corresponding position of the bottom of the feed frame 3;

[0030] As an implementation method in this embodiment, Figure 1As shown, the material discharge assembly includes two connecting rods 4 respectively fixedly connected to the upper and lower sides of the inclined frame 2, a same screw rod 5 is rotatably connected between the two connecting rods 4, a material discharge motor 6 is fixedly connected to the top of the upper connecting rod 4 of the two connecting rods 4, the output end of the material discharge motor 6 is fixedly connected to the adjacent end of the screw rod 5, the screw rod 5 is externally threadedly connected to a moving rod 7, the moving rod 7 is slidably connected in the inclined frame 2, one side of the moving rod 7 is rotatably connected to a support rod 8, the inclined frame 2 is rotatably connected to a heating base 9, and one end of the support rod 8 is rotatably connected to the bottom side of the heating base 9;

[0031] It should be noted that the connecting rod 4 is used to fix and support the screw rod 5 and the discharge motor 6. The movable rod 7 can realize oblique movement of the movable rod 7 when the screw rod 5 rotates through the threaded cooperation with the screw rod 5. At this time, the primary drying frame 10 can be pulled by the support rod 8 to rotate and tilt around the fixed axis, so that the dry grain inside it slides to one side under the action of gravity, and when the primary drying frame 10 is tilted to the bottom and fits the surface of the feed frame 3, its lower end is no longer blocked by the arc frame 45. At this time, the sliding grain can fall into the feed frame 3 from this side, completing the transfer operation of the dry grain from the primary drying frame 10 into the secondary drying box 1, which is convenient for the movement and transportation of the grain.

[0032] As an implementation method in this embodiment, Figure 1 , Figure 2 , Figure 5 and Figure 6As shown, the material spreading component includes a primary drying frame 10 fixedly connected to the top of the heating base 9, and the front and rear sides of the primary drying frame 10 are respectively provided with a first slide groove 11, a second slide groove 12 and a third slide groove 13 from top to bottom, and the two first slide grooves 11 are movably connected with a moving roller 14, and the outer side of the moving roller 14 is provided with a double spiral groove 15, and the two ends of the moving roller 14 are fixedly connected with a first pinion 16, and the two second slide grooves 12 are respectively movably connected with a left-right symmetrical movable rod 17, and the outer sides of the two ends of the two movable rods 17 are respectively provided with a tripod 18, which is also sleeved on the outer side of one end of the moving roller 14, and an extension frame 19 is fixedly connected to the tripod 18, and one of the extension frames 19 is fixedly connected to a spreading motor 20, and the side of the extension frame 19 close to each other is rotatably connected The first large gear 21, the output end of the material laying motor 20 is fixedly connected to one side of the adjacent first large gear 21, a flattening roller 22 is arranged in the third slide trough 13, and the same fixed rod 23 is respectively sleeved between the two ends of the flattening roller 22 and the two ends of the moving roller 14, and the lower sides of the front and rear sides of the primary drying frame 10 are fixedly connected with racks 24, the first large gear 21 is respectively meshed with the adjacent first small gear 16 and the adjacent rack 24, and the middle of the outer sides of the two movable rods 17 is slidably connected with the same laying frame 25, one side of the laying frame 25 is fixedly connected with a feed block 26, the top of the feed block 26 is connected with a feed hose 27, the bottom of the feed block 26 is fixedly connected with a discharge valve 28, the top of the laying frame 25 is fixedly connected with a guide rod 29, and the end of the guide rod 29 is movably connected to the inner side of the double spiral groove 15.

[0033] It should be noted that the first chute 11 is used to guide the moving roller 14, the second chute 12 is used to guide the movement of the movable rod 17, and the third chute 13 is used to guide the movement of the flattening roller 22. The double spiral groove 15 is used to cooperate with the guide rod 29. When the moving roller 14 rotates unidirectionally, the guide rod 29 and the laying frame 25 can be driven to reciprocate by the double spiral groove 15. The extension frame 19 is used to facilitate the installation of the laying motor 20. The first large gear 21 is used to perform meshing transmission between the first small gear 16 and the rack 24. The flattening roller 22 is used to smooth the convex bulge of the dry grain when it is spread by rolling and squeezing the grain when moving with the laying frame 25, so as to ensure the laying of the grain. The flattening effect is achieved while improving the drying effect of its contact with the heat source. The fixed rod 23 can drive the flattening roller 22 to move synchronously when the moving roller 14 moves, and no additional driving structure is required. The discharge valve 28 adopts an electronic control structure, which is convenient for controlling the discharge of grain and preventing discharge when necessary. The feed hose 27 is connected to the pump body to facilitate the extraction of grain to be dried from the grain pile into the equipment. The heating base 9 can be in the form of a resistance wire set thereunder for electric heating, and a heat-conducting element is arranged thereon to avoid direct contact between the heating resistance wire and the grain to be dried. By providing a spreading component, the grain to be dried can be evenly spread, ensuring that the grain particles to be dried can be fully dried, and improving the drying effect and drying uniformity.

[0034] As an implementation method in this embodiment, Figure 1 , Figure 3 , Figure 4 and Figure 7 As shown, it also includes a secondary drying component, which includes a large rotating drum 30 rotatably connected to the secondary drying box 1, a plurality of cavities 31 distributed in a circumference are opened in the large rotating drum 30, a closing plate 32 is fixedly connected to the front side of the cavity 31, a stirring rod 33 is rotatably connected between one side of the closing plate 32 and the inner wall of the cavity 31, a front end of the stirring rod 33 is fixedly connected to a second gear 34, a stirring blade 35 is fixedly connected to the outer side of the stirring rod 33, a closed circular plate 36 is fixedly connected to the front side of the secondary drying box 1, a stirring motor 37 is fixedly connected to the closed circular plate 36, a rotating disk 38 is fixedly connected to the output end of the stirring motor 37, a single tooth 39 is fixedly connected to the outer side of the rotating disk 38, a rotating shaft 40 is rotatably connected between the front end of the large rotating drum 30 and the closed circular plate 36, a plum blossom disk 41 is fixedly connected to the outer side of the rotating shaft 40, a gear ring 42 is fixedly connected to the rear side of the closed circular plate 36, and the gear ring 42 is meshed with the plurality of second gears 34.

[0035] It should be noted that the large drum 30 can rotate in the secondary drying box 1 so as to drive the grains in multiple cavities 31 to turn over at the same time. The closing plate 32 is used to seal the cavity 31. The stirring rod 33 turns over the grain in the cavity 31 by driving the stirring blade 35 to rotate. The stirring blade 35 is set in a crescent shape to facilitate the continuous promotion and fall of the grain during rotation, so as to facilitate the turning of the grain. The stirring motor 37 is used to drive the rotating disk 38 to rotate. When the rotating disk 38 rotates, the outer single tooth 39 thereof will cooperate with the structure on the plum blossom disk 41 to realize the intermittent movement of the plum blossom disk 41 and the rotating shaft 40, so that each cavity 31 can stay for a period of time when it reaches the highest point and the lowest point, so as to facilitate the grain in the feeding frame 3 to fall into the cavity 31 at the highest point at this time and to facilitate The grain in the cavity 31 at the lowest point is discharged out of the secondary drying box 1. The gear ring 42 can make the cavity 31 revolve with the rotating shaft 40, and the second gear 34 on the stirring rod 33 will passively engage with the gear ring 42 to realize the self-rotation of the stirring blade 35 driven by the stirring rod 33. There is no need to add an additional driving source, and the structure is compact. Through the set secondary drying component, the grain after one drying can be stirred and turned over, so that the high-temperature water evaporated during this period is completely separated from the grain particles and discharged out of the cavity 31 through the pores, avoiding the dry water in the grain after drying from adhering to the surface of the grain particles, further improving the drying effect of the grain particles, and turning the grain over in groups also reduces the amount of grain turned over at a single time, which is beneficial to reduce grain accumulation and assist in improving the effect of discharging water vapor.

[0036] In this embodiment, if Figure 1 , Figure 3 and Figure 7 As shown, the plum blossom disk 41 is provided with a plurality of tooth grooves 43 distributed in a circumference, and an arc groove 44 is provided between two adjacent tooth grooves 43. The tooth groove 43 is used to cooperate with the single tooth 39. When the single tooth 39 is engaged with the tooth groove 43, the rotating disk 38 can drive the plum blossom disk 41 and the rotating shaft 40 to rotate a fixed angle through the single tooth 39. When the single tooth 39 is not engaged with the tooth groove 43, the arc groove 44 will fit with the surface of the rotating disk 38, making it difficult for the rotating shaft 40 and the plum blossom disk 41 to rotate, so as to fix their current angles. The arc surface contour of the arc groove 44 is adapted to the outer contour of the rotating disk 38, and the tooth groove 43 is adapted to the single tooth 39. By providing the arc groove 44 and the tooth groove 43, the rotating shaft 40 can drive the entire large rotating drum 30 to do intermittent motion under the premise of continuous rotation of the output end of the stirring motor 37, so as to facilitate the control of the grain entering different cavities 31 for drying and improve the drying effect.

[0037] In this embodiment, if Figure 1 and Figure 3As shown, a notch is provided on the inner wall of the cavity 31, wherein when the plane formed by the central axis of the stirring rod 33 and the rotating shaft 40 is perpendicular to the ground, the notch in the uppermost cavity 31 is directly above the cavity 31, and the notch in the lowermost cavity 31 is directly below the cavity 31. When the notch is rotated to the upper part, the notch is used for feeding from the feeding frame 3 into the cavity 31, and when the notch is rotated to the lower part, the notch is used for unloading grain from the cavity 31 to the outside, thereby facilitating the loading and unloading operations of grain in the cavity 31.

[0038] In this embodiment, if Figure 1 and Figure 3 As shown, the top of the feed frame 3 is fixedly connected with an arc frame 45, and the right end of the primary drying frame 10 is set as an arc surface adapted to the adjacent side of the arc frame 45. When the arc surface fits with the surface of one side of the arc frame 45, the grain cannot be discharged outward from this side of the primary drying frame 10. When the arc surface is separated from the arc frame 45, the grain can slide outward from this side in the primary drying frame 10, which is convenient for limiting and guiding the grain in the primary drying frame 10 and unloading as needed. No additional electrical control components are required, and the structure is simple and practical.

[0039] In this embodiment, if Figure 1 As shown, a support leg 46 is fixedly connected to the bottom of the secondary drying box 1, and a material discharge trough is opened in the middle of the bottom of the secondary drying box 1. The support leg 46 is used to lift and support the secondary drying box 1 to leave space for the falling of grains, and the material discharge trough is used to cooperate with the notch to facilitate the falling of grains from the cavity 31.

[0040] In this embodiment, if Figure 1 and Figure 3 As shown, first air holes are evenly distributed on the rear side of the secondary drying box 1, and second air holes are evenly distributed on the rear inner wall of the cavity 31. The first air holes and the second air holes are used to cooperate to allow the moisture discharged from the grains in each cavity 31 in the secondary drying box 1 when turning over to be discharged outward from the cavity 31 along the second air holes and the first air holes respectively, thereby further improving the drying effect on the grains.

[0041] When the present invention is used, the device is first connected to an external power supply, and the external pump body is started through the control panel to suck the to-be-dried grain from the feed hose 27 through the feed block 26 to the vicinity of the discharge valve 28. At this time, the discharge valve 28 is opened through the external control surface to make the to-be-dried grain fall into the primary drying frame 10, and the heating base 9 and the spreading motor 20 are continued to be started through the control panel to heat and dry the to-be-dried grain in the primary drying frame 10. The working spreading motor 20 drives the first large gear 21 on one side to rotate, and the first large gear 21 on this side is respectively meshed with the rack 24 and the first small gear 16, so as to drive the moving roller 14 and the tripod 18, the extension frame 19 and the spreading motor 20 to move as a whole, and at the same time, the moving roller 14 When rotating, it will drive the double spiral groove 15 to rotate, and then push the guide rod 29 to drive the laying frame 25 to move back and forth along the axial direction of the two movable rods 17, and then drive the feeding block 26 and the discharge valve 28 to move horizontally, so that the to-be-dried grains falling from the discharge valve 28 are arranged in a Z shape in the feeding frame 3. At the same time, when the moving roller 14 moves, it will push the flattening roller 22 to move through the fixed rod 23, and the flattening roller 22 will roll the to-be-dried grains on one side of the forward direction flat. After several reciprocating movements, the pump body and the discharge valve 28 are closed through the control panel, so that the heating base 9 and the to-be-dried grains in the primary drying frame 10 are fully heated and dried. After a period of time, the discharge motor 6 is controlled to work through the control panel, and the screw rod 5 is driven to rotate. The threaded cooperation between the moving rods 7 drives the moving rod 7 to move along the oblique direction of the oblique frame 2, and the support rod 8 pulls and the primary drying frame 10 and the heating base 9 rotate and tilt around the fixed axis. When the arc surface on one side of the primary drying frame 10 is no longer in contact with the arc frame 45, the dry grain in the primary drying frame 10 will tilt and fall into the feeding frame 3 under the action of gravity. Before this, the stirring motor 37 is controlled to work through the control panel, and the stirring motor 37 drives the rotating disk 38 to rotate. When the rotating disk 38 rotates, it drives the single tooth 39 to rotate. When the single tooth 39 is engaged with the tooth groove 43 on the plum blossom disk 41 on one side, it drives the plum blossom disk 41 and the rotating shaft 40 to rotate a certain angle. At this time, the rotating shaft 40 drives the large rotating drum 30 to rotate a certain angle in the secondary drying box 1, and the rotation stops. When the feeding frame 3 stops, a cavity 31 will be directly below the feeding frame 3. At this time, the notch is connected with the feeding frame 3, and the grain in the feeding frame 3 will partially fall into the cavity 31 until the cavity 31 is rotated and moved out by the large rotating drum 30. At this time, the remaining grain in the feeding frame 3 needs to wait for the notch in the next cavity 31 to be connected with the feeding frame 3 before continuing to feed. The second gear 34 at the end of the stirring rod 33 in the cavity 31 will mesh with the gear ring 42 during the rotation process, thereby driving the stirring rod 33 to rotate. The rotation of the stirring rod 33 will drive the stirring blades 35 to separate and turn the grain therein. During the turning process, the water vapor mixed in the dry grain will be discharged outward through the pores when it is not blocked. When the cavity 31 moves to the lowest point, the notch is directly below.The grain in the cavity 31 will be discharged from the slot to the outside of the secondary drying box 1 under the action of gravity, and fall out after drying.

[0042] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A multi-stage drying grain drying device, comprising: A secondary drying box (1), wherein an inclined frame (2) is fixedly connected to the left side of the top of the secondary drying box (1), and a feed frame (3) is fixedly connected to the right side of the top of the secondary drying box (1); characterized in that it also includes: A material discharge assembly, the material discharge assembly comprising two connecting rods (4) respectively fixedly connected to the upper and lower sides of the inclined frame (2), a same screw rod (5) being rotatably connected between the two connecting rods (4), a material discharge motor (6) being fixedly connected to the top of the upper connecting rod (4) of the two connecting rods (4), a moving rod (7) being externally threadedly connected to the screw rod (5), a support rod (8) being rotatably connected to one side of the moving rod (7), and a heating base (9) being rotatably connected to the inclined frame (2); A material spreading component, the material spreading component comprises a primary drying frame (10) fixedly connected to the top of a heating base (9), the front and rear sides of the primary drying frame (10) are respectively provided with a first slide groove (11), a second slide groove (12) and a third slide groove (13) from top to bottom, the two first slide grooves (11) are movably connected with a moving roller (14), the outer side of the moving roller (14) is provided with a double spiral groove (15), the two ends of the moving roller (14) are fixedly connected with a first pinion (16), the two second slide grooves (12) are respectively movably connected with a left-right symmetrical moving rod (17), the two ends of the two moving rods (17) are respectively provided with a tripod (18), the tripod (18) is fixedly connected with an extension frame (19), one of which is The extension frame (19) is fixedly connected with a material laying motor (20), and the side of the extension frame (19) close to each other is rotatably connected with a first large gear (21), a flattening roller (22) is arranged in the third slide groove (13), and a same fixed rod (23) is respectively sleeved between the two ends of the flattening roller (22) and the two ends of the moving roller (14), and the lower sides of the front and rear sides of the primary drying frame (10) are fixedly connected with a rack (24), and the middle of the outer sides of the two movable rods (17) is slidably connected with a same laying frame (25), one side of the laying frame (25) is fixedly connected with a feed block (26), the top of the feed block (26) is connected with a feed hose (27), and the top of the laying frame (25) is fixedly connected with a guide rod (29).

2. The multi-stage drying grain drying equipment according to claim 1, characterized in that: The secondary drying assembly also comprises a large rotary drum (30) rotatably connected to the secondary drying box (1), a plurality of circumferentially distributed cavities (31) are provided in the large rotary drum (30), a sealing plate (32) is fixedly connected to the front side of the cavity (31), a stirring rod (33) is rotatably connected between one side of the sealing plate (32) and the inner wall of the cavity (31), a front end of the stirring rod (33) is fixedly connected to a second gear (34), a stirring blade (35) is fixedly connected to the outer side of the stirring rod (33), and the front side of the secondary drying box (1) is provided with a plurality of circumferentially distributed cavities (31), a sealing plate (32) is fixedly connected to the front side of the cavity (31), a stirring blade (35) is fixedly connected to the outer side of the stirring rod (33), and a stirring blade (35) is fixedly connected to the front side of the secondary drying box (1). A closed circular plate (36) is fixedly connected to the side of the large rotating drum (30), a stirring motor (37) is fixedly connected to the closed circular plate (36), a rotating disk (38) is fixedly connected to the output end of the stirring motor (37), a single tooth (39) is fixedly connected to the outer side of the rotating disk (38), a rotating shaft (40) is rotatably connected between the front end of the large rotating drum (30) and the closed circular plate (36), a plum blossom disk (41) is fixedly connected to the outer side of the rotating shaft (40), a gear ring (42) is fixedly connected to the rear side of the closed circular plate (36), and the gear ring (42) is meshed with a plurality of second gears (34).

3. The multi-stage drying grain drying equipment according to claim 2, characterized in that: The plum blossom disk (41) is provided with a plurality of tooth grooves (43) distributed in a circumferential manner, and an arc groove (44) is provided between two adjacent tooth grooves (43).

4. The multi-stage drying grain drying equipment according to claim 3, characterized in that: The arc surface profile of the arc-shaped groove (44) is matched with the outer profile of the rotating disk (38), and the tooth groove (43) is matched with the single tooth (39).

5. The multi-stage drying grain drying equipment according to claim 2, characterized in that: The inner wall of the cavity (31) is provided with a notch, wherein when the plane formed by the central axis of the stirring rod (33) and the rotating shaft (40) is perpendicular to the ground, the notch in the uppermost cavity (31) is located directly above the cavity (31), and the notch in the lowermost cavity (31) is located directly below the cavity (31).

6. The multi-stage drying grain drying equipment according to claim 1, characterized in that: The top of the feed frame (3) is fixedly connected with an arc frame (45), and the right end of the primary drying frame (10) is arranged as an arc surface adapted to the adjacent side of the arc frame (45).

7. The multi-stage drying grain drying equipment according to claim 1, characterized in that: The bottom of the secondary drying box (1) is fixedly connected with a support leg (46), and a material discharge chute is provided in the middle of the bottom of the secondary drying box (1).

8. The multi-stage drying grain drying equipment according to claim 7, characterized in that: The rear side of the secondary drying box (1) is evenly distributed with first air holes, and the rear inner wall of the cavity (31) is evenly distributed with second air holes.

9. The multi-stage drying grain drying equipment according to claim 1, characterized in that: The output end of the material discharging motor (6) is fixedly connected to the adjacent end of the screw rod (5), the moving rod (7) is slidably connected in the inclined frame (2), one end of the support rod (8) is rotatably connected to the bottom side of the heating base (9), and the tripod (18) is also sleeved on the outside of one end of the moving roller (14). The output end of the material spreading motor (20) is fixedly connected to one side of the adjacent first large gear (21), and the first large gear (21) is respectively meshed with the adjacent first small gear (16) and the adjacent rack (24). The bottom of the feed block (26) is fixedly connected with a discharge valve (28), and the end of the guide rod (29) is movably connected to the inner side of the double spiral groove (15).

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