Grain drying section with variable airflow, drying equipment and working method

Abstract

The invention discloses an airflow-variable grain drying section, drying equipment and a working method, solves the problem that an airflow flowing mode in a grain drying section in the prior art is fixed and cannot be adjusted, and has the beneficial effect that the airflow flowing mode of the drying section is adjustable. Comprising a supporting frame body, at least two layers of drying corner boxes are supported in the supporting frame body, the two ends of each drying corner box communicate with the outside through the supporting frame body, ventilation openings are formed in the parts, located in the supporting frame body, of the drying corner boxes, and the supporting frame body supports an air adjusting component on the outer side face of the communicating position of the drying corner boxes and the outside; the air adjusting component is located on the air inlet side and the air outlet side of the drying corner box, the air adjusting component can move relative to the supporting frame body, the air adjusting component is provided with at least two layers of communicating ports, and in the process that the air adjusting component moves relative to the supporting frame body, the communicating port of one layer can communicate with the drying corner box so as to change the flowing path of hot air entering the supporting frame body.

Description

Technical Field

[0001] The invention relates to the technical field of grain drying, in particular to a grain drying section with variable airflow, drying equipment and a working method. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] Food security is an important issue in the current agricultural development. After the grain is harvested, it is a key link in the current agricultural production to dry it to a safe moisture level through mechanized equipment. The drying process of the traditional drying tower is determined by the fixed drying section structure. For example, Chinese patent application CN201320116043.7 discloses a co-current and countercurrent grain drying tower, which is equipped with multiple co-current drying layers, multiple countercurrent drying layers, and multiple slow drying layers. That is to say, the air inlet and outlet and the upper and lower combinations of the drying sections in the existing drying equipment determine that it only has one or two drying processes such as co-current, countercurrent, and mixed flow. Moreover, the drying process of each section is determined and cannot be changed and adjusted. This not only affects the drying efficiency, but also makes it impossible for the entire drying equipment to adjust the drying strategy for different moisture contents and different types of grains, resulting in heat loss, insufficient drying, and cracking.

[0004] Chinese patent application CN202410927731.4 discloses a circulating grain dryer with multiple drying layers, which is provided with a first drying box, in which a first connecting plate and a second connecting plate are provided to form a drying corner box, but the airflow in the first drying box cannot be adjusted according to demand. Summary of the invention

[0005] In view of the deficiencies in the prior art, an object of the present invention is to provide a grain drying section with variable airflow, which is capable of changing the positions of the front and rear air inlets and outlets of the grain drying section, thereby changing the flow path of the airflow in the grain drying section.

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

[0007] A grain drying section with variable airflow comprises a supporting frame, at least two layers of drying corner boxes are supported in the supporting frame, both ends of the drying corner boxes are connected to the outside through the supporting frame, ventilation holes are arranged in the part of the drying corner boxes located in the supporting frame, and an air regulating component is supported on the outer side surface of the supporting frame at the place where the drying corner boxes are connected to the outside, the air regulating component is located on the air inlet side and the air outlet side of the drying corner box, the air regulating component is movable relative to the supporting frame, at least two layers of connecting ports are arranged in the air regulating component, and during the movement of the air regulating component relative to the supporting frame, the connecting port of one layer can be connected to the drying corner box to change the flow path of the hot air entering the supporting frame.

[0008] In the grain drying section with variable airflow as described above, the support frame is provided with an open groove on the outer side surface where the drying corner box is connected to the outside, the air regulating member is placed in the open groove, and the length of the air regulating member is smaller than the length of the open groove.

[0009] In the grain drying section with variable airflow as described above, L-shaped grooves are arranged on the upper and lower sides of the two opposite sides of the support frame, and the two L-shaped grooves arranged opposite to each other form the open groove;

[0010] The support frame is provided with guide wheels in the L-shaped grooves, and the guide wheels are rotatable relative to the L-shaped grooves.

[0011] In a grain drying section with variable airflow as described above, the structures of the air regulating components on both sides are the same, and when the two vertical connecting ports in two adjacent layers of connecting ports are located in the same vertical plane, the drying corner boxes of two adjacent layers are staggered. Alternatively, when the two vertical connecting ports in two adjacent layers of drying corner boxes are located in the same vertical plane, the connecting ports of two adjacent layers are staggered, and the setting position of the connecting port of the air regulating component corresponds to the setting position of the drying corner box.

[0012] In a grain drying section with variable airflow as described above, a telescopic member is fixed to one end of the support frame, the telescopic end of the telescopic member is connected to a connecting push rod, the connecting push rod is connected to an air regulating member, so that the air regulating member is driven to perform linear reciprocating motion relative to the support frame through the telescopic member and the connecting push rod, and the telescopic members on both sides are connected to a controller.

[0013] In the grain drying section with variable airflow as described above, a recess is formed at one end of the support frame, and ears are arranged on both sides of the recess. The fixed end of the telescopic frame is fixed to the end plate at one end of the support frame, and the telescopic end of the telescopic member is connected to the connecting push rod through a connecting plate. The connecting push rod and the telescopic member are arranged parallel to each other, and the connecting push rod is arranged through the ear of the support frame.

[0014] In the grain drying section with variable airflow as described above, the distance between the connecting openings of two adjacent layers is 1.3-1.8 times the height of the drying corner box, and the distance between two adjacent connecting openings in the same layer is 1-1.5 times the width of the drying corner box.

[0015] In the grain drying section with variable airflow as described above, the longitudinal cross-section of the drying corner box is a pentagon, the angle of the top of the drying corner box is 50-80°, the two sides of the bottom edge of the drying corner box are lower sides, and the length of the upper side of the drying corner box is greater than the length of the lower side.

[0016] In a second aspect, the present invention discloses a drying device, comprising at least two grain drying sections with variable airflow, wherein two adjacent supporting frames are arranged up and down and connected.

[0017] In a third aspect, the present invention further discloses a working method of a drying device, comprising the following contents:

[0018] The air regulating components of two adjacent grain drying sections move synchronously:

[0019] The air regulating component on the air inlet side of the drying corner box shields the drying corner box on the lower layer, and the connecting port on the upper layer of the air inlet side is connected with the drying corner box on the upper layer. The air regulating component on the air outlet side of the drying corner box shields the drying corner box on the upper layer, and the connecting port on the lower layer of the air outlet side is connected with the drying corner box on the lower layer. Hot air enters the supporting frame from the drying corner box on the upper layer and contacts the drying object, and flows out from the drying corner box on the lower layer of the air outlet side, forming downstream hot air drying;

[0020] Alternatively, the air regulating component on the air inlet side of the drying corner box shields the drying corner box on the upper layer, the connecting port on the lower layer on the air inlet side is connected with the drying corner box on the lower layer, the air regulating component on the air outlet side of the drying corner box shields the drying corner box on the lower layer, the connecting port on the upper layer on the air outlet side is connected with the drying corner box on the upper layer, the hot air enters the supporting frame from the drying corner box on the lower layer and contacts the drying object, and flows out from the drying corner box on the upper layer on the air outlet side, forming countercurrent hot air drying;

[0021] The air regulating components of two adjacent grain drying sections do not move synchronously: the upper grain drying section carries out co-current hot air drying, and the lower grain drying section carries out counter-current hot air drying, forming an overall mixed flow state; or, the upper grain drying section carries out counter-current hot air drying, and the lower grain drying section carries out co-current hot air drying, forming an overall mixed flow state.

[0022] The beneficial effects of the present invention are as follows:

[0023] 1) In the present invention, a supporting frame is used to support multiple layers of drying corner boxes, and both ends of the drying corner boxes are connected to the outside world. An air regulating component is arranged on the outer side of the supporting frame. The air regulating component is movable relative to the supporting frame. The air regulating component is arranged at a connecting port having the same number of layers of drying corner boxes. During the movement of the air regulating component relative to the supporting frame, the connecting port can be connected to the drying corner box. By adjusting the air regulating components on both sides of the air inlet side and the air outlet side, the connection between the drying corner boxes of different layers on both sides and the outside world is achieved, so as to adjust the flow path of the airflow in the grain drying section, thereby realizing variable airflow. Not only can the drying efficiency be improved, but also the airflow flow mode of the grain drying section can be adjusted for different types of grains.

[0024] 2) In the present invention, an open groove is provided on the outer side surface of the support frame, and the air regulating component is placed in the open groove, which facilitates the movement of the air regulating component relative to the support frame and ensures that the air regulating component will not separate from the support frame during the movement of the air regulating component. The open groove is formed by an L-shaped groove, and the side of the L-shaped groove limits the air regulating component to prevent the air regulating component from separating from the open groove. In addition, the support frame is provided with a guide wheel in the L-shaped groove to ensure smooth movement of the air regulating component.

[0025] 3) In order to avoid the simultaneous opening or closing of the drying corner boxes of two adjacent layers in the present invention, not all the drying corner boxes of the air inlet side are opened, or not all the drying corner boxes of the air outlet side are opened. To this end, the drying corner boxes of the two adjacent layers are staggered, or the connecting ports of the two adjacent layers are staggered.

[0026] 4) In the present invention, a recess is provided at one end of the support frame to facilitate the setting of the telescopic member. The telescopic end of the telescopic member is connected to the connecting push rod, and the connecting push rod passes through the ear of the support frame to be connected to the air regulating member. The ear of the support frame effectively guides the movement of the connecting push rod to ensure the linearity of the movement of the air regulating member.

[0027] 5) The drying equipment provided by the present invention is a drying equipment in which multiple grain drying sections are assembled into an integral whole. The airflow mode of each grain drying section can be adjusted. When the grain drying section is divided into two sections, the combination of the two drying modes of cocurrent, countercurrent and mixed flow can be realized. For the objects to be dried, the airflow modes of two adjacent grain drying sections can be the same or different. Changing the flow path of the airflow is beneficial to improving the drying efficiency of the grains. After the grain type is changed, the drying mode of the grain drying section can be changed, thereby providing more drying functions for the drying equipment, realizing multi-purpose use of one machine, and the whole can be suitable for different types of grains, avoiding the occurrence of problems such as heat loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0029] Figure 1 is a schematic diagram of a grain drying section with variable airflow according to one or more embodiments of the present invention.

[0030] Figure 2 is a front view of a grain drying section with variable airflow according to one or more embodiments of the present invention.

[0031] Figure 3 It is a schematic diagram of airflow entering an air inlet of a grain drying section with variable airflow in a co-current hot air drying state according to one or more embodiments of the present invention.

[0032] Figure 4 It is a schematic diagram of airflow flowing out of an air outlet in a grain drying section with variable airflow in a co-current hot air drying state according to one or more embodiments of the present invention.

[0033] Figure 5 It is a schematic diagram of airflow entering an air inlet of a grain drying section with variable airflow in a countercurrent hot air drying state according to one or more embodiments of the present invention.

[0034] Figure 6 It is a schematic diagram of airflow flowing out of an air outlet in a grain drying section with variable airflow in a countercurrent hot air drying state according to one or more embodiments of the present invention.

[0035] In the figure: the distances or sizes between parts are exaggerated to show the positions of various parts, and the schematic diagram is for reference only.

[0036] Among them: 1. Support frame, 2. Drying corner box, 3. End plate, 4. Linear bearing seat, 5. Telescopic member, 6. Connecting plate, 7. Connecting push rod, 8. Mounting seat, 9. Air adjustment member, 10. Guide wheel, 11. L-shaped groove, 12. Ear, 13. Upper side, 14. Lower side, 15. Connecting port, 16. Support plate, 17. Flanging, 18. Positioning pin. DETAILED DESCRIPTION

[0037] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0038] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise explicitly stated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof;

[0039] As introduced in the background technology, the problem that the airflow pattern in the grain drying section in the prior art is fixed and cannot be adjusted. In order to solve the above technical problem, the present invention proposes a grain drying section with variable airflow.

[0040] Embodiment 1

[0041] In a typical embodiment of the present invention, reference is made to Figure 1As shown, a grain drying section with variable airflow includes a supporting frame 1, in which at least two layers of drying corner boxes 2 are supported, both ends of the drying corner boxes are connected to the outside through the supporting frame 1, and a ventilation hole is arranged on the part of the drying corner box 2 located in the supporting frame 1. The supporting frame 1 supports an air regulating component 9 on the outer side surface where the drying corner box is connected to the outside, and the air regulating component 9 is located on the air inlet side and the air outlet side of the drying corner box 2. The air regulating component 9 is movable relative to the supporting frame, and the air regulating component 9 is provided with at least two layers of connecting ports 15. During the movement of the air regulating component relative to the supporting frame, the connecting port of one layer can be connected to the drying corner box 2 to change the flow path of the hot air entering the supporting frame 1.

[0042] In this embodiment, the support frame 1 includes a support plate 16 in the length direction, and the drying corner box 2 is supported by two support plates 16 in the length direction. An end plate 3 is provided in the width direction of the support frame, and the end plate 3 is connected to the support plates 16 on both sides, wherein a recess is formed at one end of the support frame 1, that is, the end plate here is not flush with the end of the support plate 16, but forms a recess with the part of the support plates on both sides that exceeds the end plate, so as to facilitate the installation of the telescopic member. The support frame 1 is provided with ears 12 on both sides of the recess, that is, on both sides of the end of the support plate close to the telescopic member, and the ears 12 are turned outward from the end side of the support plate, and the ears 12 can be vertically connected to the support plate;

[0043] In addition, flanges 17 are provided on the upper and lower sides of the support plate 16, flanges are provided on the upper and lower sides of the end plate, and openings are provided on the flanges 17, and bolts pass through two adjacent grain drying sections and are fastened by nuts to achieve connection between the two adjacent grain drying sections; and, with reference to Figure 6 As shown, the flange on the upper side is provided with a positioning pin 18 so as to be inserted into the upper grain drying section.

[0044] It is easy to understand that the support plate on one side of the support frame is connected to the hot air channel, and the support plate on the other side of the support frame is connected to the return air channel.

[0045] It should be noted that an open groove is provided on the outer side of the support frame 1 at the connection point between the drying corner box 2 and the outside world, and the air regulating member 9 is placed in the open groove. The length of the air regulating member is less than the length of the open groove, that is, the length of the support plate. L-shaped grooves 11 are provided on the upper and lower sides of the opposite sides of the support frame, that is, the flanges on the upper and lower sides of the support plate are bent toward the center of the air regulating member to form the L-shaped groove 11. The two L-shaped grooves 11 arranged opposite to each other form an open groove. The side of the L-shaped groove 11 limits the air regulating member 9 to prevent the air regulating member from detaching from the open groove, and ensure that the air regulating member 9 can move along the L-shaped groove 11.

[0046] It is easy to understand that guide wheels 10 are provided in the L-shaped grooves 11 of the support frame 1, that is, guide wheels 10 are provided at the flanges on the upper and lower sides of the support plate. Specifically, two guide wheels or another number of guide wheels can be provided, and a distance is set between adjacent guide wheels 10. The guide wheel 10 can be rotatably installed at the flange, and the guide wheel can be rotatable relative to the flange. The guide surface of the guide wheel 10 can contact the air regulating component 9, which is also conducive to the smooth movement of the air regulating component.

[0047] It is easy to understand that at least two layers of drying corner boxes 2 can be provided in the support frame 1, and each layer is provided with multiple drying corner boxes 2. The longitudinal cross-section of the drying corner box 2 is a pentagon, and of course it can also be other shapes. Ventilation holes are provided at the bottom of the drying corner box 2 to allow hot air to flow into the inner side of the drying section through the ventilation holes. In this embodiment, when the longitudinal cross-section of the drying corner box is a pentagon, the angle of the top of the drying corner box is 50-80°, which can be 60°. The two sides of the upper part of the drying corner box are upper sides 13, and the two sides of the bottom of the drying corner box are lower sides 14. The length of the upper side 13 of the drying corner box is greater than that of the lower side 14, which is beneficial to the uniform distribution of external grain discharge and avoidance of local accumulation.

[0048] refer to Figure 2 As shown, the shape of the connecting port of the air regulating component 9 is the same as the shape of the longitudinal section of the drying corner box 2. In this embodiment, two layers of drying corner boxes are arranged. Correspondingly, the air regulating component is provided with two layers of connecting ports. The distance c between two adjacent layers of connecting ports is 1.3-1.8 times of the height d of the drying corner box, and can be 1.5 times. The distance e between two adjacent connecting ports in the same layer of connecting ports is 1-1.5 times of the width of the drying corner box, such as 1 times. The sum of the blank height a at the top of the upper layer of connecting ports and the blank height b at the bottom of the lower layer of connecting ports is equal to the distance c between the two adjacent layers of connecting ports.

[0049] It should be noted that when the two vertical connecting ports 15 of two adjacent layers are located in the same vertical plane, the drying corner boxes of two adjacent layers are staggered, or when the two vertical connecting ports of two adjacent layers are located in the same vertical plane, the connecting ports of two adjacent layers are staggered, and the setting position of the connecting port of the air regulating component corresponds to the setting position of the drying corner box 2, so that during the movement of the air regulating component, the air regulating component 9 of one layer can block the drying corner box of one layer.

[0050] In other examples, when the drying corner box is provided with three layers, the air regulating component is also provided with three layers of connecting ports. During the movement of the air regulating component, the connecting port in the middle of the three layers of connecting ports can be connected with the drying corner box 2.

[0051] In the present embodiment, the air regulating component 9 is specifically an air regulating plate, and the structures of the air regulating components on both sides are the same, that is, the positions of the connecting ports are the same. Of course, in other examples, the positions of the connecting ports of the air regulating components on both sides may be different, as long as the connecting port of one layer on the air inlet side or the air outlet side can be connected with the drying corner box of the corresponding layer during the movement of the air regulating component.

[0052] In this embodiment, a telescopic member 5 is fixed to the end plate at the recess of the support frame 1, and the telescopic member 5 is fixed to the end plate 3 through a support. The telescopic member 5 is specifically an existing pneumatic push rod. The telescopic end of the telescopic member 5 exceeds the ear 12 of the support plate and is connected to one end of the connecting push rod 7 through the connecting plate 6. The other end of the connecting push rod 7 passes through the ear 12 of the support plate 16 and is connected to the air regulating member 9 through the mounting seat 8. A linear bearing seat 4 is arranged between the connecting push rod 7 and the ear 12. The connecting push rod 7 and the telescopic member 5 are arranged parallel to each other. The mounting seat 8 is specifically a mounting plate. The mounting plate is provided with an opening, and the mounting plate can be installed at the air regulating member 9. The mounting plate is provided with a convex portion, and a slot is provided at the convex portion. One end of the connecting push rod 7 is inserted into the slot. In this way, the air regulating member 9 is driven to perform linear reciprocating motion relative to the support frame 1 by the telescopic member 5 and the connecting push rod, and the telescopic members on both sides are connected to the controller.

[0053] Among them, the controller can be an existing PLC controller or other types of controllers. The controller can be a controller of the drying equipment. The movement of the telescopic component is controlled by the controller, and the moving distance of the telescopic component corresponding to different types of grains can be set in the controller. In this way, the on-site staff only needs to confirm the object to be dried, and the controller can quickly adjust the moving distance of the air regulating component relative to the supporting frame.

[0054] In the grain drying section provided in the present embodiment, a supporting frame 1 supports multiple layers of drying corner boxes 2, both ends of the drying corner boxes are connected with the outside world, an air regulating component 9 is arranged on the outer side of the supporting frame 1, and the air regulating component is movable relative to the supporting frame. The air regulating component is arranged at a connecting port 15 having the same number of layers of drying corner boxes. During the movement of the air regulating component relative to the supporting frame, the connecting port can be connected with the drying corner boxes, and the connection between the drying corner boxes of different layers on both sides and the outside world is achieved by adjusting the air regulating components on the air inlet side and the air outlet side, so as to adjust the flow path of the airflow in the grain drying section, thereby realizing variable airflow, which can not only improve the drying efficiency, but also adjust the airflow flow mode of the grain drying section for different types of grains.

[0055] Embodiment 2

[0056] This embodiment provides a drying device, comprising at least two grain drying sections with variable airflow, wherein two adjacent support frames are arranged vertically and connected.

[0057] A working method of a drying device, comprising the following contents:

[0058] After the grains enter the grain drying section, the grains are piled between the drying corner boxes 2 in the drying section, and the drying corner boxes 2 become the hot air flow space;

[0059] The air regulating components of two adjacent grain drying sections move synchronously:

[0060] refer to Figure 3 and Figure 4 As shown, the telescopic member 5 on the air inlet side of the drying corner box is extended, the air regulating member shields the drying corner box on the lower layer, the communication port on the upper layer of the air inlet side is connected with the drying corner box on the upper layer, the telescopic member 5 on the air outlet side of the drying corner box is retracted, the air regulating member shields the drying corner box on the upper layer, the communication port on the lower layer of the air outlet side is connected with the drying corner box on the lower layer, the hot air (airflow) enters the support frame from the air inlet of the upper drying corner box to contact the drying object, and flows out from the air outlet of the lower drying corner box on the air outlet side, forming downstream hot air drying (referring to the flow mode of the hot air being the same as the way the grains fall);

[0061] Alternatively, refer to Figure 5 and Figure 6 As shown, the telescopic member 5 on the air inlet side of the drying corner box is retracted, the air regulating member shields the upper drying corner box, the communicating port of the lower layer on the air inlet side is communicated with the drying corner box on the lower layer, the telescopic member 5 on the air outlet side of the drying corner box is extended, the air regulating member shields the lower drying corner box, the communicating port of the upper layer on the air outlet side is communicated with the drying corner box on the upper layer, the hot air enters the supporting frame from the air inlet of the drying corner box 2 on the lower layer to contact the drying object, and flows out from the air outlet of the drying corner box on the upper layer on the air outlet side, forming countercurrent hot air drying (referring to the flow direction of the grain being opposite to the flow direction of the hot air);

[0062] The air regulating components of two adjacent grain drying sections do not move synchronously: in the direction of the air inlet side, the telescopic component 5 of the upper grain drying section is extended, and the telescopic component 5 of the lower grain drying section is shortened; in the direction of the air outlet side, the telescopic component 5 of the upper grain drying section is contracted, and the lower grain drying section is extended. At this time, the upper grain drying section is dried with downstream hot air, and the lower grain drying section is dried with countercurrent hot air; or, in the direction of the air inlet side, the telescopic component 5 of the upper grain drying section is contracted, and the telescopic component 5 of the lower grain drying section is extended; in the direction of the air outlet side, the telescopic component 5 of the upper grain drying section is extended, and the lower grain drying section is contracted. At this time, the upper grain drying section is dried with countercurrent hot air, and the lower grain drying section is dried with downstream hot air, so that the airflow modes of the upper and lower grain drying sections are different, forming an overall mixed flow state.

[0063] When drying is completed, part of the grain is discharged from the bottom of the grain drying section, and the grain on the upper part slides and falls through the bottom of the drying corner box 2 to both sides of the drying corner box 2, so that the grain flows evenly, avoiding local accumulation that affects the grain flow and causes local grain over-drying.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A grain drying section with variable airflow, characterized in that: It includes a supporting frame, in which at least two layers of drying corner boxes are supported, and both ends of the drying corner boxes are connected to the outside through the supporting frame. Ventilation holes are arranged on the part of the drying corner boxes located inside the supporting frame. The supporting frame supports air regulating components on the outer side surface of the part where the drying corner boxes are connected to the outside. The air regulating components are located on the air inlet side and the air outlet side of the drying corner boxes. The air regulating components are movable relative to the supporting frame, and at least two layers of connecting ports are arranged on the air regulating components. During the movement of the air regulating components relative to the supporting frame, the connecting ports of one layer can be connected to the drying corner boxes to change the flow path of the hot air entering the supporting frame.

2. A grain drying section with variable airflow according to claim 1, characterized in that: The support frame is provided with an open groove on the outer side surface of the drying corner box at the connection point with the outside, and the air regulating component is placed in the open groove, and the length of the air regulating component is smaller than the length of the open groove.

3. A grain drying section with variable airflow according to claim 2, characterized in that: The upper and lower sides of the two opposite sides of the support frame are both provided with L-shaped grooves, and the two L-shaped grooves arranged opposite to each other form the open groove; The support frame is provided with guide wheels in the L-shaped grooves, and the guide wheels are rotatable relative to the L-shaped grooves.

4. A grain drying section with variable airflow according to claim 1, characterized in that: The structures of the air regulating components on both sides are the same. When the two vertical connecting ports in two adjacent layers of connecting ports are located in the same vertical plane, the drying corner boxes of the two adjacent layers of drying corner boxes are staggered. Alternatively, when the two vertical connecting ports in two adjacent layers of drying corner boxes are located in the same vertical plane, the connecting ports of the two adjacent layers of connecting ports are staggered.

5. A grain drying section with variable airflow according to claim 1, characterized in that: A telescopic member is fixed at one end of the support frame, the telescopic end of the telescopic member is connected to the connecting push rod, and the connecting push rod is connected to the air regulating member, so that the air regulating member is driven to perform linear reciprocating motion relative to the support frame through the telescopic member and the connecting push rod, and the telescopic members on both sides are connected to the controller.

6. A grain drying section with variable airflow according to claim 5, characterized in that: A recess is formed at one end of the support frame, and ears are arranged on both sides of the recess. The fixed end of the telescopic frame is fixed to the end plate at one end of the support frame, and the telescopic end of the telescopic member is connected to the connecting push rod through a connecting plate. The connecting push rod and the telescopic member are arranged parallel to each other, and the connecting push rod passes through the ear of the support frame.

7. A grain drying section with variable airflow according to claim 1, characterized in that: The distance between the communication openings of two adjacent layers is 1.3-1.8 times the height of the drying corner box, and the distance between two adjacent communication openings in the same layer is 1-1.5 times the width of the drying corner box.

8. A grain drying section with variable airflow according to claim 1, characterized in that: The longitudinal section of the drying corner box is a pentagon, the angle of the top of the drying corner box is 50-80 degrees, the two sides of the bottom of the drying corner box are lower sides, and the length of the upper side of the drying corner box is greater than that of the lower side.

9. A drying device, characterized in that: The invention comprises at least two grain drying sections with variable airflow according to any one of claims 1 to 8, wherein two adjacent supporting frames are arranged up and down and connected.

10. A working method of a drying device according to claim 9, characterized in that: It includes the following: The air regulating components of two adjacent grain drying sections move synchronously: The air regulating component on the air inlet side of the drying corner box shields the drying corner box on the lower layer, and the connecting port on the upper layer of the air inlet side is connected with the drying corner box on the upper layer. The air regulating component on the air outlet side of the drying corner box shields the drying corner box on the upper layer, and the connecting port on the lower layer of the air outlet side is connected with the drying corner box on the lower layer. Hot air enters the supporting frame from the drying corner box on the upper layer and contacts the drying object, and flows out from the drying corner box on the lower layer of the air outlet side, forming downstream hot air drying; Alternatively, the air regulating component on the air inlet side of the drying corner box shields the drying corner box on the upper layer, the connecting port on the lower layer on the air inlet side is connected with the drying corner box on the lower layer, the air regulating component on the air outlet side of the drying corner box shields the drying corner box on the lower layer, the connecting port on the upper layer on the air outlet side is connected with the drying corner box on the upper layer, the hot air enters the supporting frame from the drying corner box on the lower layer and contacts the drying object, and flows out from the drying corner box on the upper layer on the air outlet side, forming countercurrent hot air drying; The air regulating components of two adjacent grain drying sections do not move synchronously: the upper grain drying section carries out co-current hot air drying, and the lower grain drying section carries out counter-current hot air drying, forming an overall mixed flow state; or, the upper grain drying section carries out counter-current hot air drying, and the lower grain drying section carries out co-current hot air drying, forming an overall mixed flow state.

Images