A circulating air supply type grain drying device

Abstract

The present invention discloses a circulating air supply type grain drying device, which relates to the technical field of grain drying. In order to improve the effect of grain drying, the device specifically comprises a base and a circulating feeding part, wherein the circulating feeding part comprises: a drying cylinder, which is fixed to the outer wall at the top of the base; a rotating ring, which is movably connected to the inner wall of the circumference of the drying cylinder, and the inner wall of the through hole opened on the surface of the rotating ring is movably connected to a lifting rod; an upper fan-shaped plate, which is fixed to the outer wall at the bottom of the lifting rod by a pin; and a lower fan-shaped plate, which is connected and fixed to the upper fan-shaped plate by an intermediate column. The present invention arranges the intermediate fan-shaped plate to be rotatable along the upper fan-shaped plate and the lower fan-shaped plate to form a gap between the intermediate fan-shaped plate and the upper fan-shaped plate and the lower fan-shaped plate. When the intermediate fan-shaped plate moves downward, the grain at the bottom of the drying cylinder can be squeezed into the top of the upper fan-shaped plate through the gap, thereby facilitating the collection and lifting of the grain.

Description

Technical Field

[0001] The invention relates to the technical field of grain drying, and in particular to a circulating air supply type grain drying device. Background Art

[0002] In the prior art, after grains such as wheat and corn are harvested, they need to be dried in order to effectively extend their storage time. The traditional drying method is to spread the grains on the ground and use sunlight to dry the grains. However, this method has low working efficiency and is not suitable for drying large quantities of grains. Therefore, the current grain drying needs to be processed by a professional drying device in order to increase the drying rate. The existing grain drying device is mainly a vertical cylindrical structure in structure, that is, the grains are introduced into the drying cylinder, and hot air is blown into the drying cylinder to dry the grains by hot air.

[0003] After searching, the Chinese patent application number 201922459753.X discloses a thermal circulation grain dryer, including a dryer body, a control switch is provided on the side surface of the dryer body, the input end of the control switch is electrically connected to the output end of the external power supply, four support columns are provided on the lower surface of the dryer body, a hot air duct is provided on the upper surface of the dryer body, the hot air duct is connected to the external hot air source, a circulating air duct is provided on the side surface of the dryer body, the upper end of the circulating air duct penetrates into the upper part of the side of the dryer body, the lower end of the circulating air duct penetrates into the lower part of the side of the dryer body, and a circulating fan is provided on the circulating air duct, a feed pipe is provided on the upper surface of the dryer body, a cover plate is connected to the upper surface of the feed pipe, and a discharge pipe is provided on the lower surface of the dryer body, and a solenoid valve is provided on the discharge pipe.

[0004] A heat circulation grain dryer in the above patent has the following shortcomings: during use, since the hot air pipe and the circulating material pipe are respectively located on both sides of the top of the dryer, the grain and the hot air cannot be in uniform and sufficient contact during drying, which will prolong the grain drying time and affect the operating efficiency. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a circulating air supply type grain drying device.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A circulating air supply type grain drying device comprises a base and a circulating feeding part, wherein the circulating feeding part comprises:

[0008] Drying cylinder: It is fixed to the top outer wall of the base;

[0009] Rotating ring: It is movably connected to the inner wall of the circumference of the drying cylinder, and the inner wall of the through hole opened on the surface of the rotating ring is movably connected to the lifting rod;

[0010] Upper sector plate: It is fixed to the outer wall of the bottom of the lifting rod by pins;

[0011] Lower sector plate: it is connected and fixed to the upper sector plate through an intermediate column;

[0012] The middle sector plate is movably connected between the bottom outer wall of the upper sector plate and the top outer wall of the lower sector plate, and a rotating column is fixed to the top outer wall of the middle sector plate through a pin;

[0013] Jet hole: It is annularly opened on the outer wall of the rotating cylinder;

[0014] Connecting pipe: It is fixed to the outer wall of the top of the upper sector plate, and the outer wall of the connecting pipe is welded with an air pipe, and the inner wall of the air pipe is welded with a friction ring;

[0015] Hollow column: It is movably connected to the inner wall of the circumference of the trachea, and a spring is fixed between the trachea and the top of the hollow column by a pin;

[0016] Gas plate: It is fixed to the outer wall of the bottom of the hollow column by pins, and a plurality of drying air holes are opened on the surface of the gas plate;

[0017] Support rod: It is fixed to the outer wall of the top of the gas disk, and the upper and lower fan-shaped plates are provided with through holes that match the outer diameter of the support rod;

[0018] The top outer wall of the drying cylinder is fixed with an L-shaped plate and a accommodating frame, and the top outer wall of the L-shaped plate is fixed with a driving motor;

[0019] The output end of the driving motor is fixed with a pulley 1 by a pin, the inner wall of the through hole opened on the top of the accommodating frame is movably connected with a pulley 2, the pulley 1 and the pulley 2 are driven by a belt, and the outer wall of the circumference of the rotating column is welded with a limiting rib, and the limiting rib is movably connected to the inner wall of the pulley 2;

[0020] A bracket is fixed to the outer wall of the top of the drying cylinder, an electric telescopic rod is fixed to the inner wall of the top of the bracket, a transverse plate is fixed to the output end of the electric telescopic rod through a pin, a connecting seat is movably connected to the outer wall of the top of the rotating column, and the connecting seat is embedded in the inner wall of the through hole opened on the surface of the transverse plate;

[0021] A hot air blower is fixed to the outer wall of the circumference of the drying cylinder, and a same circulation pipe is fixed to the input end of the hot air blower and the outer wall of the top of the connecting seat;

[0022] A feed pipe is welded on the circumferential outer wall of the drying cylinder, and a feed valve is fixed on the top outer wall of the feed pipe;

[0023] A feed pipe is welded to the outer wall of the bottom of the drying cylinder, and a discharge valve is fixed at one end of the feed pipe;

[0024] A series rod is fixed to the outer wall of the top of the gas disk, and a plurality of groups of heating plates are connected in series on the circumferential outer wall of the series rod from top to bottom.

[0025] Based on the above solution, it is preferred that: a blanking plate is fixed to the outer wall of the bottom of the gas disk.

[0026] Based on the above solution, it is further preferred that: a pleated sleeve is bonded to the outer wall of the top of the drying cylinder.

[0027] The beneficial effects of the present invention are:

[0028] 1. By setting the middle fan-shaped plate to be able to rotate at a certain angle along the upper fan-shaped plate and the lower fan-shaped plate, a gap can be formed between the middle fan-shaped plate and the upper fan-shaped plate and the lower fan-shaped plate. When the middle fan-shaped plate moves downward, the grain at the bottom of the drying drum can be squeezed into the top of the upper fan-shaped plate through the gap, thereby facilitating the collection and lifting of the grain.

[0029] 2. The upper fan-shaped plate can be lifted by providing an electric telescopic rod, so that when the grain is lifted to a certain height, it can fall along the notch under the action of gravity. The air disc and drying air holes can be used to evenly apply hot air to the surface of the falling grain, thereby drying the grain.

[0030] 3. By providing a driving motor, the rotating column can be driven to rotate alternately clockwise and counterclockwise at a certain angle horizontally, so that the air disk can move the grain during the rotation, so that the grain can be dispersed around, thereby extending the time that the grain falls to the bottom of the drying cylinder, thereby increasing the time that the grain is fully in contact with the hot air and improving the drying effect.

[0031] 4. By providing a heating plate, the grain can be pre-dried before being dried by the air disk. The elastic force of the spring can produce relative displacement between the heating plate and the rotating column, so that the heating plate can move up and down along the inside of the grain, so that the heating plate can pre-dry the grain evenly.

[0032] 5. The provision of a discharge plate can further slow down the falling rate of grains, so that the grains can be better scattered toward the inner wall of the circumference of the drying drum. At the same time, by setting the discharge plate to a cone with an opening at the center, the accumulation of grains on the inner surface of the discharge plate can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of the overall structure of a circulating air supply type grain drying device proposed by the present invention;

[0034] Figure 2 This is a schematic cross-sectional view of a circulating air supply type grain drying device proposed by the present invention;

[0035] Figure 3 This is a schematic diagram of the main structure of a circulating air supply type grain drying device proposed by the present invention;

[0036] Figure 4 This is a schematic diagram of the exploded structure of the drying part and the driving part of a circulating air supply type grain drying device proposed by the present invention;

[0037] Figure 5 This is a schematic structural diagram of a lifting part and a drying part of a circulating air supply type grain drying device proposed by the present invention;

[0038] Figure 6 This is a schematic diagram of the overall structure of the support part of a circulating air supply type grain drying device proposed by the present invention;

[0039] Figure 7 This is a schematic diagram of the exploded structure of the support part of a circulating air supply type grain drying device proposed by the present invention;

[0040] Figure 8 This is a schematic diagram of the connection structure of the support part of a circulating air supply type grain drying device proposed by the present invention;

[0041] Fig. 9 The present invention provides a schematic diagram of the elastic structure of a circulating air supply type grain drying device.

[0042] In the figure: 1-base, 2-feed pipe, 3-drying cylinder, 4-circulation pipe, 5-hot air blower, 6-discharge valve, 7-electric telescopic rod, 8-transverse plate, 9-bracket, 10-rotating ring, 11-lifting rod, 12-upper fan-shaped plate, 13-lower fan-shaped plate, 14-support rod, 15-L-shaped plate, 16-drive motor, 17-receiving frame, 18-rotating column, 19-pulley one, 20-pulley two, 21-belt, 22-heating plate, 23-middle fan-shaped plate, 24-gas disc, 25-limiting rib, 26-pleated sleeve, 27-connecting seat, 28-trachea, 29-hollow column, 30-jet hole, 31-connecting pipe, 32-discharge plate, 33-middle column, 34-resistance ring, 35-spring, 36-drying air hole, 37-feed valve, 38-discharge pipe, 39-tandem rod. DETAILED DESCRIPTION

[0043] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0044] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0045] In the description of this patent, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing this patent and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this patent.

[0046] In the description of this patent, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be fixedly connected or set, or it can be detachably connected or set, or connected or set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0047] Embodiment 1:

[0048] A circulating air supply type grain drying device, such as Figure 1-9 As shown, it includes a base 1 and a circulating feeding part, and the circulating feeding part includes:

[0049] Drying drum 3: It is fixed to the top outer wall of the base 1 by bolts;

[0050] The rotating ring 10 is rotatably connected to the inner wall of the circumference of the drying cylinder 3, and the inner wall of the through hole opened on the surface of the rotating ring 10 is slidably connected to the lifting rod 11;

[0051] The upper sector plate 12 is fixed to the outer wall of the bottom of the lifting rod 11 by pins;

[0052] The lower sector plate 13 is connected and fixed to the upper sector plate 12 via an intermediate column 33;

[0053] The middle sector plate 23 is rotatably connected between the bottom outer wall of the upper sector plate 12 and the top outer wall of the lower sector plate 13, and the top outer wall of the middle sector plate 23 is fixed with a rotating column 18 by a pin;

[0054] The jet hole 30 is annularly formed on the outer wall of the rotating column 18;

[0055] The connecting pipe 31 is fixed to the outer wall of the top of the upper sector plate 12 by bolts, and the air pipe 28 is welded to the outer wall of the connecting pipe 31, and the abutment ring 34 is welded to the inner wall of the air pipe 28;

[0056] Hollow column 29: It is slidably connected to the inner wall of the circumference of the air pipe 28, and a spring 35 is fixed between the air pipe 28 and the top of the hollow column 29 by a pin;

[0057] Gas plate 24: It is fixed to the outer wall of the bottom of the hollow column 29 by pins, and a plurality of drying air holes 36 are opened on the surface of the gas plate 24;

[0058] Support rod 14: It is fixed to the top outer wall of the gas disk 24, and the upper sector plate 12 and the lower sector plate 13 are both provided with through holes matching the outer diameter of the support rod 14;

[0059] By providing a drying drum 3, grains that need to be dried can be placed, and the rotating ring 10 can be used to guide the movement trajectory of the lifting rod 11, so that the lifting rod 11 can move up and down in the vertical direction along the through holes opened on the surface of the rotating ring 10, and the rotating column 18 can be used to drive the middle fan-shaped plate 23 to rotate within a certain angle along the gap between the upper fan-shaped plate 12 and the lower fan-shaped plate 13. The upper fan-shaped plate 12 and the lower fan-shaped plate 13 have the same specifications and sizes, and the outer diameters of the upper fan-shaped plate 12 and the lower fan-shaped plate 13 are adapted to the inner diameter of the drying drum 3, so that when the lifting rod 11 drives the upper fan-shaped plate 12 and the lower fan-shaped plate 13 to move up and down, the upper fan-shaped plate 12 and the lower fan-shaped plate 13 can play a scraping self-cleaning role on the inner surface of the drying drum 3, thereby ensuring the cleanliness of the inner surface of the drying drum 3, and the middle column 33 can be used to clean the upper fan-shaped plate 12 and the lower fan-shaped plate 13. The lower fan-shaped plates 13 are connected with each other, and at the same time, the upper fan-shaped plates 12 and the lower fan-shaped plates 13 can be sandwiched to limit the middle fan-shaped plates 23. The surface of the middle fan-shaped plates 23 is composed of multiple groups of fan-shaped plates, and the number and specifications of the fan-shaped plates on the middle fan-shaped plates 23 are the same as the number and specifications of the fan-shaped plates on the surfaces of the upper fan-shaped plates 12 and the lower fan-shaped plates 13. When the middle fan-shaped plates 23 rotate along the gap between the upper fan-shaped plates 12 and the lower fan-shaped plates 13 to be dislocated with each other, when the upper fan-shaped plates 12 and the lower fan-shaped plates 13 move downward along the inside of the drying cylinder 3, the grain at the bottom of the drying cylinder 3 can be squeezed into the upper part of the upper fan-shaped plates 12 through the gap between the middle fan-shaped plates 23 and the upper fan-shaped plates 12 and the lower fan-shaped plates 13. As the upper fan-shaped plates 12 and the lower fan-shaped plates 13 continue to move downward, most of the grain at the bottom of the drying cylinder 3 can be squeezed into the upper part of the upper fan-shaped plates 12.

[0060] Then, by continuing to rotate the middle fan-shaped plate 23, the middle fan-shaped plate 23 blocks the openings on the surfaces of the upper fan-shaped plate 12 and the lower fan-shaped plate 13, so that when the upper fan-shaped plate 12 and the lower fan-shaped plate 13 move upward, the grain on the upper fan-shaped plate 12 can move upward together. When the upper fan-shaped plate 12 moves to a certain height, a certain gap is created again between the middle fan-shaped plate 23 and the upper fan-shaped plate 12 and the lower fan-shaped plate 13, so that the grain on the upper fan-shaped plate 12 can fall through the gap under the action of gravity. The number of the air discs 24 is the same as the number of the fan-shaped plates on the surface of the middle fan-shaped plate 23, so that when the grain falls, the drying air holes 36 opened on the surface of the air disc 24 can wrap the grain in a ring shape, and the drying air holes 36 are used to dry the grain. The hot air can be made to act evenly on the surface of the grain, so that the grain can be dried. At the same time, the rotating ring 10 is rotatably connected to the inner wall of the circumference of the drying cylinder 3, so that when the rotating column 18 is rotating, the middle fan-shaped plate 23 can be synchronously rotated. Since the air disc 24 vertically penetrates between the upper fan-shaped plate 12 and the lower fan-shaped plate 13, when the middle fan-shaped plate 23 contacts the surface of the air disc 24 during rotation, the middle fan-shaped plate 23 can drive the air disc 24 and the upper fan-shaped plate 12 and the lower fan-shaped plate 13 to rotate synchronously. When the air disc 24 rotates, the falling grain can be dispersed to the surroundings. During the dispersion process, the grain will also come into contact with the surface of the air disc 24, so that the hot air can act on the grain surface in a relatively concentrated manner, thereby effectively improving the grain drying effect.

[0061] In this way, after the grain has completely fallen from the top of the upper fan-shaped plate 12, the grain can be collected and lifted again according to the above steps. After repeating this process two or more times, the final drying effect of the grain can be effectively guaranteed.

[0062] The top outer wall of the drying cylinder 3 is fixed with an L-shaped plate 15 and a accommodating frame 17 by bolts, the top outer wall of the L-shaped plate 15 is fixed with a driving motor 16 by bolts, the output end of the driving motor 16 is fixed with a pulley 19 by a pin, the inner wall of the through hole opened at the top of the accommodating frame 17 is rotatably connected with a pulley 20, the pulley 19 and the pulley 20 are driven by a belt 21, and the circumferential outer wall of the rotating column 18 is welded with a limiting rib 25, and the limiting rib 25 is slidably connected to the inner wall of the pulley 20;

[0063] By providing a driving motor 16, pulley 2 20 can be driven to rotate under the linkage action of pulley 1 19 and belt 21. During the rotation, pulley 2 20 can drive the rotating column 18 to rotate through the limiting rib 25. The limiting rib 25 can effectively ensure that the rotating column 18 can slide up and down along pulley 2 20 while preventing relative slippage of pulley 2 20 in the process of driving the air pipe 28 to rotate.

[0064] The top outer wall of the drying cylinder 3 is fixed with a bracket 9 by bolts, the top inner wall of the bracket 9 is fixed with an electric telescopic rod 7 by bolts, the output end of the electric telescopic rod 7 is fixed with a transverse plate 8 by a pin, the top outer wall of the rotating column 18 is rotatably connected with a connecting seat 27, and the connecting seat 27 is embedded in the inner wall of the through hole opened on the surface of the transverse plate 8;

[0065] By providing an electric telescopic rod 7, the transverse plate 8 can be driven to move in the vertical direction, so that the rotating column 18 can be driven to move up and down in the vertical direction through the connecting seat 27, so that the grain can be lifted.

[0066] The outer wall of the drying cylinder 3 is fixed with a hot air blower 5 by bolts, and the input end of the hot air blower 5 and the outer wall of the top of the connecting seat 27 are fixed with a same circulation pipe 4 by bolts;

[0067] By providing a hot air blower 5, hot air can be circulated between the drying cylinder 3 and the circulation pipe 4. The hot air blower 5 can heat the air, thereby effectively reducing the loss of heat, so that the circulation pipe 4 can continuously circulate the hot air to the air inlet hole opened on the top of the connecting seat 27, and then the hot air is introduced into the connecting pipe 31 through the rotating column 18 and the jet hole 30, and finally the grain is dried through the drying air hole 36.

[0068] A feed pipe 2 is welded to the outer circumferential wall of the drying cylinder 3, and a feed valve 37 is fixed to the top outer wall of the feed pipe 2 by bolts;

[0069] By providing the feed pipe 2, the grain can be introduced into the drying drum 3 for drying by air flow, and the feed valve 37 can be used to prevent hot air from overflowing after the grain is transported.

[0070] A discharge pipe 38 is welded to the outer wall of the bottom of the drying cylinder 3, and a discharge valve 6 is fixed to one end of the discharge pipe 38 by bolts;

[0071] The feeding pipe 38 is provided so that the grain after drying can be discharged.

[0072] The top outer wall of the drying cylinder 3 is bonded with a pleated sleeve 26;

[0073] The pleated sleeve 26 can be provided to prevent hot air from overflowing from the through hole opened at the top of the drying cylinder 3 when the rotating column 18 is rotating.

[0074] When the present embodiment is in use, when it is necessary to dry the grain, the grain is first introduced into the drying drum 3 through the feed pipe 2 and the feed valve 37, then the hot air blower 5 is started, and the circulation pipe 4 is used to circulate the hot air, so as to heat the inside of the drying drum 3, and then the driving motor 16 is started, so that the driving motor 16 drives the middle fan plate 23 to rotate a certain angle along the upper fan plate 12 and the lower fan plate 13, so that a gap is generated between the middle fan plate 23 and the upper fan plate 12 and the lower fan plate 13, and then the electric telescopic rod 7 is used to drive the rotating column 18 to move downward in the vertical direction, so that the middle fan plate 23 and the upper fan plate 12 and the lower fan plate 13 are gradually pressed into the grain. Under the action of pressure, the grain begins to gradually enter the upper part of the upper fan plate 12 from the gap, and then the driving motor 16 is used to drive the middle fan plate 23 to rotate again, so that the middle fan plate 23 closes the gap again, and the electric telescopic rod 7 drives the middle fan plate 23 to move upward. During the upward movement, the upper fan-shaped plate 12 and the lower fan-shaped plate 13 are driven to move synchronously under the guidance of the lifting rod 11. When the upper fan-shaped plate 12 and the lower fan-shaped plate 13 rise to a certain height, the driving motor 16 is used to create a gap between the middle fan-shaped plate 23 and the upper fan-shaped plate 12 and the lower fan-shaped plate 13 again. The grain falls along the gap under the action of gravity. During the falling process, the grain contacts the hot air ejected from the drying air holes 36, thereby utilizing the hot air to dry the grain. During this process, the driving motor 16 is used to drive the middle fan-shaped plate 23 to rotate alternately clockwise and counterclockwise, so that the air disc 24 can move the grain during the rotation, so that the grain can also be dispersed to the surroundings during the drying process, thereby effectively extending the time for the grain to fall to the bottom of the drying cylinder 3, so that the suspended grain can fully contact with the hot air, thereby ensuring the drying effect. After repeating this step for many times, the discharge valve 6 is opened, so that the dried grain is discharged through the discharge pipe 38.

[0075] Embodiment 2:

[0076] A circulating air supply type grain drying device, such as Figure 5 , Figure 7 As shown, in order to pre-dry the grain, this embodiment makes the following supplements on the basis of embodiment 1: the top outer wall of the gas disk 24 is fixed with a series rod 39 by bolts, and the circumferential outer wall of the series rod 39 is connected in series with multiple groups of heating plates 22 from top to bottom;

[0077] By providing a heating plate 22, the grain on the upper fan-shaped plate 12 can be pre-dried before the grain is dried by the air disk 24. During the downward movement of the rotating column 18, when the bottom of the support rod 14 contacts the inner wall of the bottom of the drying cylinder 3, the drying cylinder 3 limits the support rod 14. At this time, when the rotating column 18 continues to move downward, the spring 35 is compressed by the air pipe 28, so that relative movement occurs between the heating plate 22 and the rotating column 18, so that the heating plate 22 can move up and down along the surface of the grain stacked on the upper fan-shaped plate 12, so that the heating plate 22 can evenly pre-dry the grain at different heights, thereby ensuring the uniformity of pre-drying.

[0078] The bottom outer wall of the gas plate 24 is fixed with a blanking plate 32 by bolts;

[0079] By providing a feed plate 32, the falling rate of the grain can be further slowed down when the grain falls through the gap, thereby increasing the contact time between the grain and the hot air ejected from the drying holes 36. The feed plate 32 is tapered as a whole, and a circular hole begins at the center, thereby preventing the dried grain from remaining on the inner surface of the feed plate 32.

[0080] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A circulating air supply type grain drying device, comprising a base (1) and a circulating feeding part, It is characterized in that The circulating feeding part comprises: Drying cylinder (3): fixed to the top outer wall of the base (1); A rotating ring (10) is movably connected to the inner wall of the circumference of the drying cylinder (3), and a lifting rod (11) is movably connected to the inner wall of a through hole provided on the surface of the rotating ring (10); Upper sector plate (12): fixed to the outer wall of the bottom of the lifting rod (11) by pins; Lower sector plate (13): connected and fixed to the upper sector plate (12) via an intermediate column (33); The middle sector plate (23) is movably connected between the bottom outer wall of the upper sector plate (12) and the top outer wall of the lower sector plate (13), and the top outer wall of the middle sector plate (23) is fixed with a rotating column (18) via a pin; The air jet hole (30) is annularly formed on the outer wall of the rotating column (18); A connecting pipe (31) is fixed to the outer wall of the top of the upper sector plate (12), and a trachea (28) is welded to the outer wall of the circumference of the connecting pipe (31), and a resistance ring (34) is welded to the inner wall of the circumference of the trachea (28); The hollow column (29) is movably connected to the inner wall of the circumference of the air pipe (28), and a spring (35) is fixed between the air pipe (28) and the top of the hollow column (29) through a pin; The gas plate (24) is fixed to the outer wall of the bottom of the hollow column (29) by pins, and a plurality of drying holes (36) are provided on the surface of the gas plate (24); Support rod (14): It is fixed to the top outer wall of the gas disk (24), and the upper fan-shaped plate (12) and the lower fan-shaped plate (13) are both provided with through holes matching the outer diameter of the support rod (14); An L-shaped plate (15) and a receiving frame (17) are fixed to the top outer wall of the drying cylinder (3), and a driving motor (16) is fixed to the top outer wall of the L-shaped plate (15); The output end of the driving motor (16) is fixed with a pulley 1 (19) by a pin, the inner wall of the through hole opened at the top of the accommodating frame (17) is movably connected with a pulley 2 (20), the pulley 1 (19) and the pulley 2 (20) are driven by a belt (21), and a limiting rib (25) is welded on the circumferential outer wall of the rotating column (18), and the limiting rib (25) is movably connected to the inner wall of the pulley 2 (20); A bracket (9) is fixed to the top outer wall of the drying cylinder (3), an electric telescopic rod (7) is fixed to the top inner wall of the bracket (9), a transverse plate (8) is fixed to the output end of the electric telescopic rod (7) via a pin, a connecting seat (27) is movably connected to the top outer wall of the rotating column (18), and the connecting seat (27) is embedded in the inner wall of a through hole opened on the surface of the transverse plate (8); A hot air blower (5) is fixed on the circumferential outer wall of the drying cylinder (3), and a same circulation pipe (4) is fixed on the input end of the hot air blower (5) and the top outer wall of the connecting seat (27); A feed pipe (2) is welded on the circumferential outer wall of the drying cylinder (3), and a feed valve (37) is fixed on the top outer wall of the feed pipe (2); A discharge pipe (38) is welded to the outer wall of the bottom of the drying cylinder (3), and a discharge valve (6) is fixed to one end of the discharge pipe (38); A series rod (39) is fixed to the top outer wall of the gas disk (24), and a plurality of groups of heating plates (22) are connected in series from top to bottom on the circumferential outer wall of the series rod (39).

2. A circulating air supply type grain drying device according to claim 1, It is characterized in that A blanking plate (32) is fixed to the outer wall of the bottom of the gas plate (24).

3. A circulating air supply type grain drying device according to claim 2, It is characterized in that A pleated sleeve (26) is bonded to the outer wall of the top of the drying cylinder (3).

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