Telescopic granary of movable grain dryer

Abstract

The telescopic granary of the movable grain dryer is characterized in that the inner wall of the granary is further movably connected with a telescopic granary A in the vertical direction, the top and the bottom of the telescopic granary A are open, a plurality of guide vertical pipes A are fixed to the outer side wall of the granary, and guide vertical rods are correspondingly fixed to the positions, corresponding to the guide vertical pipes A, of the outer side wall of the telescopic granary A; a spring A is arranged at the bottom in the guide vertical pipe A, a limiting convex ring A is inwards arranged at the top of the guide vertical pipe A, the guide vertical rod upwards penetrates out of the limiting convex ring A, and the spring A has pre-pressing acting force. According to the telescopic granary of the movable grain dryer, through the telescopic granary structure of the granary, more grains can be dried in the granary, and heat of the hot air bin is relatively gathered in the range of the granary and the telescopic bin through the action of the telescopic bin; and the grains can overflow outwards from the top of the telescopic bin after a longer time, so that the drying efficiency of the grains is further improved.

Description

Technical Field

[0001] This invention relates to the technical field of grain drying equipment, specifically to a telescopic grain silo for a movable grain dryer. Background Technology

[0002] Newly harvested grains have a moisture content as high as 24%-32%, and in some areas of Northeast China, they even contain ice crystals. The safe storage moisture content for grains is around 14%. Previously, to quickly reduce the moisture content to this safe level, people typically relied on natural sun-drying. However, in rainy weather, delayed drying could cause the grains to mold and spoil. Later, grain dryers appeared on the market, which can reduce the moisture content of grains, making them easier to store.

[0003] To ensure drying efficiency, grain dryers are typically set at a relatively high height, providing ample space for the grain to dry. Initially, due to size and weight limitations, grain dryers were fixed in one location. Grain needed to be transported to the dryer for drying, and since harvesting occurred at specific times, large quantities of grain were transported to the dryer for queuing.

[0004] Therefore, there is a particularly urgent need in agriculture for a grain dryer that can be moved to locations where grain drying is required. However, the first thing to consider in the research and development of such a dryer is its mobility during transit. Rural roads are relatively narrow and uneven, and height restrictions may also be encountered when entering rural areas. If these issues cannot be resolved, the dryer cannot be easily moved to the location where grain drying is needed, thus reducing the practicality of this technological approach. Furthermore, because mobile grain dryers prioritize ease of movement, they cannot use high-power heating equipment, and the grain storage area is also very limited. How to achieve effective grain drying under relatively limited heating equipment power and grain storage space is also a key technical challenge of this application. To address these challenges, the applicants, Jiangsu Provincial Agricultural Machinery Testing and Appraisal Station, Jinhu Shuangyang Machinery Co., Ltd., and Huaian Xinpei Machinery Co., Ltd., have jointly conducted research and development to solve the aforementioned technical problems.

[0005] This application addresses the need for a specialized telescopic grain hopper for the aforementioned mobile grain dryer. This design ensures the dryer can effectively guarantee the maximum amount of grain dried in a single operation, while also preventing the hopper's size from affecting the dryer's mobility and stability during relocation. Furthermore, it guarantees the drying effect of the grain corresponding to the hopper. This technical challenge was primarily addressed through joint research and development by the applicant, Jiangsu Provincial Agricultural Machinery Testing and Appraisal Station, and Jinhu Shuangyang Machinery Co., Ltd. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a telescopic grain silo for a movable grain dryer. Through the telescopic silo structure, not only can more grain be dried in the silo, but also the heat from the hot air chamber is concentrated within the area of ​​the silo and the telescopic silo, requiring a longer time to escape from the top of the telescopic silo, thereby further improving the drying efficiency of the grain.

[0007] The technical solution adopted in this invention is: A telescopic grain silo for a movable grain dryer includes a frame. An air heating device and an open-top grain silo are sequentially fixed to the top of the frame from front to back along the forward direction. A grain inlet hopper is also fixed to the side of the frame facing away from the air heating device. A grain inlet auger is also fixed to the frame, with one end of the auger communicating with the bottom of the grain inlet hopper. A hot air chamber is fixed inside the grain silo, and multiple air vents A are evenly distributed on the surface of the hot air chamber. A bottom lifting auger is also fixed inside the grain silo, passing through the hot air chamber. The bottom end of the bottom lifting auger passes downwards through the bottom of the hot air chamber and the bottom of the grain silo, and connects with the grain feeding auger at one end of the grain silo. The top end of the bottom lifting auger passes upwards through the top of the hot air chamber and extends upwards to the top of the grain silo, swinging to connect with the bottom end of the top lifting auger. A winch A is provided on the outer wall of the grain silo facing away from the air heating device. The lifting cable A wound on the winch A is used to lift and drive the top lifting auger. The air heating device is connected to the inside of the hot air chamber through a hot air pipe that passes through the side wall of the grain silo and the side wall of the hot air chamber. The inner wall of the grain silo is also movably connected to the top and bottom. The telescopic silo A is an open structure. Multiple guide risers A are fixed to the outer wall of the silo, evenly distributed along its outer wall. Guide rods are fixed to the outer wall of the telescopic silo A at positions corresponding to the guide risers A. A spring A is installed at the bottom of each guide riser A, and a limiting ring A is installed at the top of each guide riser A. The guide rods extend upwards through the limiting ring A. The spring A has a preload force; the restoring force of the spring A with the preload force pushes the guide rod upwards until its bottom end is limited by the limiting ring A. At this point, the telescopic silo A... The telescopic bin A extends to its maximum stroke. A winding roller is rotatably connected to the frame. The top of the guide rod is fixed to one end of the pull-down cable. The other end of the pull-down cable extends downward and is wound around the guide pulley B on the frame, then tensioned and fixed to the winding roller. The part of the pull-down cable between the connecting end of the guide rod and the guide pulley B is parallel to the lifting direction of the telescopic bin A. The winding roller winds up the pull-down cable, causing the telescopic bin A to move downward to its maximum stroke against the force of the spring A. At this time, the top of the telescopic bin A is flush with the top of the grain silo.

[0008] A further improvement of the present invention is that a preheating sleeve is fixedly fitted inside the hot air chamber on the side wall of the bottom grain lifting auger, and one end of the hot air pipe extending into the hot air chamber is connected to the preheating sleeve. A heating chamber is fixedly fitted inside the bottom of the hot air chamber on the side wall of the bottom grain lifting auger. The top of the heating sleeve is closed, and the bottom of the heating sleeve extends downward to the bottom plate of the hot air chamber. The bottom grain lifting auger passes through the bottom plate of the heating chamber. The bottom plate of the heating chamber is connected to the side wall of the bottom grain lifting auger. The top of the heating chamber is open, and the top edge of the heating chamber is sealed and fixed to the bottom plate of the hot air chamber. The portion of the bottom plate of the hot air chamber between the heating chamber and the bottom lifting auger is evenly provided with multiple ventilation holes.

[0009] A further improvement of the present invention is that the bottom of the grain silo is a conical arc surface B with an inner diameter decreasing along the top-to-bottom direction. A flexible stirring ring is rotatably connected inside the grain silo, corresponding to the top of the conical arc surface B. The flexible stirring ring includes an annular wire mesh, a transmission ring fixed to the bottom edge of the annular wire mesh, and an annular wire rope fixed to the top edge of the annular wire mesh. The inner wall of the transmission ring is rotatably connected to the outer wall of the top edge of the conical arc surface B via a bearing. The annular wire rope moves along an annular track groove corresponding to the inner wall of the grain silo. Multiple stirring protrusions are evenly distributed on the top surface of the annular wire mesh, and these protrusions are arranged along the generatrix direction of their respective positions on the flexible stirring ring. A stirring drive motor is fixed to the outer wall of the grain silo, and the stirring drive motor is connected to the transmission ring.

[0010] A further improvement of the present invention is that the stirring drive motor is fixed to the outer wall of the grain silo via a transmission box, the drive shaft of the stirring drive motor is connected to the input end of the transmission box, and the end of the power output shaft of the output end of the transmission box extends inward into the grain silo and is connected to the gear ring provided on the outer wall of the transmission ring via a transmission gear.

[0011] A further improvement of the present invention is that a telescopic silo B with an open top and bottom is movably connected between the inner wall of the grain silo and the outer wall of the telescopic silo A. The outer wall of the telescopic silo A matches the inner wall of the telescopic silo B, and the outer wall of the telescopic silo B matches the inner wall of the grain silo. Guide risers B are fixedly installed on the outer wall of the telescopic silo B at positions corresponding to guide risers A. The guide risers B are movably connected vertically along the corresponding guide risers A. The guide rods are movably connected vertically along the corresponding guide risers B. One end of the spring A is fixed to the bottom of the guide riser A, and the other end is fixed to the bottom of the guide riser B. The top end of the guide riser B extends upward from the limiting protrusion A. The bottom end of the guide riser B is provided with a limiting protrusion A that matches the limiting protrusion A. The restoring force of the spring A, which has a preload, pushes the guide riser B upward until the limiting protrusion A and the limiting protrusion A make limiting contact. At this time, the telescopic bin B extends upward from the grain bin to its maximum stroke. The bottom of the guide riser B is provided with a spring B, and the top of the guide riser B is provided with a limiting protrusion B. The guide rod extends upward through the limiting protrusion B. The bottom end of the guide rod is provided with a limiting protrusion B that matches the limiting protrusion B. The spring B has a preload. The restoring force of the spring B, which has a preload, pushes the guide rod upward until the limiting protrusion B and the limiting protrusion B make limiting contact. At this time, the telescopic bin A extends upward from the telescopic bin B to its maximum stroke.

[0012] A further improvement of the present invention is that the pull-down cable is wound up by a winding roller, which drives the telescopic bin A to move downward relative to the telescopic bin B to the maximum stroke position against the force of the spring B, and at the same time drives the telescopic bin B to move downward relative to the grain bin to the maximum stroke position against the force of the spring A. At this time, the top of the telescopic bin A and the top of the telescopic bin B are flush with the top of the grain bin.

[0013] A further improvement of the present invention is that when the telescopic bin A moves upward relative to the telescopic bin B to its maximum stroke under the restoring force of the spring B, the bottom edge of the telescopic bin A is lower than the top edge of the telescopic bin B, and when the telescopic bin B moves upward relative to the grain silo to its maximum stroke under the restoring force of the spring A, the bottom edge of the telescopic bin B is lower than the top edge of the grain silo.

[0014] A further improvement of the present invention is that the top end of the guide rod is fixedly connected to the telescopic chamber A, the bottom end of the guide rod is slidably connected to the guide riser B, the top end of the guide riser B is fixedly connected to the telescopic chamber B, and the bottom end of the guide riser B is slidably connected to the guide riser A.

[0015] A further improvement of the present invention is that the inner wall of the grain silo and the outer wall of the telescopic silo B are slidably connected by a guide mechanism A, and the inner wall of the telescopic silo B and the outer wall of the telescopic silo A are slidably connected by a guide mechanism B; the guide mechanism A includes multiple guide ribs A fixed to the inner wall of the grain silo and guide ribs B fixed to the outer wall of the telescopic silo B and slidably connected to the guide ribs A respectively; the guide mechanism B includes multiple guide ribs C fixed to the inner wall of the telescopic silo B and guide ribs D fixed to the outer wall of the telescopic silo A and slidably connected to the guide ribs C respectively.

[0016] A further improvement of the present invention is that the side walls of the grain silo, the side walls of the telescopic silo A and the side walls of the telescopic silo B are uniformly provided with a plurality of ventilation holes B, the diameter of the ventilation holes B is smaller than that of the ventilation holes A, and the ventilation area of ​​all ventilation holes B per unit area is smaller than the ventilation area of ​​all ventilation holes A per unit area.

[0017] The beneficial effects of this invention are as follows: First, the telescopic grain silo of the movable grain dryer of the present invention, through the telescopic silo structure, not only enables more grain to be dried in the grain silo, but also, through the action of the telescopic silo, the heat of the hot air chamber is relatively concentrated within the area of ​​the grain silo and the telescopic silo, and it takes longer to overflow from the top of the telescopic silo, thereby further improving the drying efficiency of the grain.

[0018] Secondly, the telescopic grain silo of the movable grain dryer of the present invention, through the hot air chamber structure provided inside the grain silo, can effectively dry the grain that has been transported to the top of the grain silo by the grain lifting auger and then falls into the grain silo.

[0019] Third, the telescopic grain bin of the movable grain dryer of the present invention extends upward from the hot air chamber through the bottom grain lifting auger, thereby pre-drying the grain in the bottom grain lifting auger with the heat in the hot air chamber, thus further improving the grain drying efficiency.

[0020] Fourth, the telescopic grain hopper of the mobile grain dryer of the present invention not only allows the grain dryer to pass smoothly through rural roads and reach the places where grain needs to be dried on-site, but also ensures the drying effect through the structure of the grain hopper and the grain conveying and drying mechanism.

[0021] Fifth, the telescopic grain silo of the movable grain dryer of the present invention, through the grain stirring mechanism inside the silo, allows the grain falling into the silo to be continuously stirred, thereby improving the heat exchange effect. This not only allows the grain accumulated in the lower part of the silo to still have good heat exchange with the hot air chamber, but also allows the water vapor generated by the drying of the grain accumulated in the lower part of the silo to be discharged in a timely and effective manner, thereby further improving the drying effect of the grain.

[0022] Sixth, the telescopic grain bin of the movable grain dryer of the present invention, through the setting of winch A and lifting cable A, allows the top grain lifting auger to be swung, which is convenient for the operator to swing the top grain lifting auger to the same axis as the bottom grain lifting auger when the grain needs to be dried, or to swing the top grain lifting auger to be placed on top of the air heating device when the grain dryer needs to be moved.

[0023] Seventh, the telescopic grain hopper of the movable grain dryer of the present invention, through the action of winch B and lifting cable B, makes the top lifting auger, which swings to the same axis as the bottom lifting auger, more stable.

[0024] Eighth, the telescopic grain bin of the movable grain dryer of the present invention, through the action of the pull-down cable wound around the winding roller, allows the telescopic bin to extend upward when drying grain and retract during turnover, making operation more convenient and stable.

[0025] Ninth, the telescopic grain bin of the movable grain dryer of the present invention, the heating sleeve and heating chamber structure set in the hot air chamber, can achieve heating and drying once each time the grain is lifted upward by the bottom lifting auger, thereby ensuring the drying effect of the grain.

[0026] Tenth, the telescopic grain silo of the movable grain dryer of the present invention, through the function of the open top grain silo and the air vent A of the hot air silo, can make the hot air in the hot air silo evenly distributed in the grain silo and then flow upward, thereby effectively drying the grain in the grain silo and the grain falling into the grain silo.

[0027] Eleventh, the telescopic grain hopper of the movable grain dryer of the present invention, through the air vent B, and the pore diameter of the air vent B relative to the air vent A and the unit air permeability, can also allow the hot air with high moisture content generated by drying the grain in the grain hopper to be discharged in a timely manner through the air vent B, avoiding the need for a longer drying time to dry the grain due to the inability to effectively remove the moisture in the hot air. Attached Figure Description

[0028] Figure 1 This is a three-dimensional schematic diagram taken from the top right side of the movable grain dryer in the direction of travel.

[0029] Figure 2 This is a front view schematic diagram of a portable grain dryer.

[0030] Figure 3 This is a three-dimensional schematic diagram of a portable grain dryer viewed from below.

[0031] Figure 4 for Figure 2A front sectional view of the grain storage unit after removing the heating air device, the top grain lifting auger, and the telescopic section of the grain silo.

[0032] Figure 5 An enlarged 3D schematic diagram showing the top grain lifting auger (without the grain drop cover and grain discharge guide chute) laid down and not connected to the bottom grain lifting auger (without the cover tube).

[0033] Figure 6 This is a schematic diagram showing the rear view of a portable grain dryer in use.

[0034] Figure 7 This is a schematic diagram showing the rear end view of a movable grain dryer when the second folding ladder is folded up.

[0035] Figure 8 This is a front view of a movable grain dryer with all components on the upper part of the frame removed.

[0036] Figure 9 This is a magnified front view of the support leg portion on the left side of the infeed direction for a movable grain dryer.

[0037] Figure 10 This is a magnified front view (without splitting) of the support leg portion on the right side of the infeed direction for a movable grain dryer. Detailed Implementation

[0038] Combination Figures 1-4 , Figures 6-7It is known that the telescopic grain silo of the movable grain dryer includes a frame 1. An air heating device 4 and a grain silo 2 with an open top are sequentially fixed to the top of the frame 1 from front to back along the forward direction. A grain inlet hopper 3 is also fixed to the side of the frame 1 facing away from the air heating device 4. A grain inlet auger 6 is also fixed to the frame 1. The top surface of one end of the grain inlet auger 6 communicates with the bottom of the grain inlet hopper 3. A hot air chamber 5 is fixed inside the grain silo 2. Multiple ventilation holes A are evenly distributed on the surface of the hot air chamber 5. A bottom lifting auger 7 is also fixed inside the grain silo 2, passing through the hot air chamber 5. The bottom end of the bottom-lifting auger 7 passes downward through the bottom of the hot air chamber 5 and the bottom of the grain silo 2, and connects with the grain feeding auger 6 at one end of the grain silo 2. The top end of the bottom-lifting auger 7 passes upward through the top of the hot air chamber 5 and extends upward to the top of the grain silo 2, where it swings and connects with the bottom end of the top-lifting auger 8. A winch A19 is provided on the outer wall of the grain silo 2 facing away from the air heating device 4. The lifting cable A wound on the winch A19 is used to lift and drive the top-lifting auger 8. The air heating device 4 is connected to the inside of the hot air chamber 5 through the hot air pipe 9 passing through the side wall of the grain silo 2 and the side wall of the hot air chamber 5. The inner wall of the grain silo 2 is also movably connected with an extension that is open at both the top and bottom. The telescopic silo A12 has multiple guide risers A13 fixed to its outer wall. These guide risers A13 are evenly distributed along the outer wall of the silo 2. Guide rods 15 are fixed to the outer wall of the telescopic silo A12 at positions corresponding to the guide risers A13. A spring A is located at the bottom of each guide riser A13, and a limiting ring A is located at the top of each guide riser A13. The guide rods 15 extend upwards through the limiting ring A. The spring A has a preload force; the restoring force of the spring A pushes the guide rods 15 upwards until their bottom ends are limited by the limiting ring A. At this point, the telescopic silo A12 extends upwards. At the maximum stroke position of the grain bin 2, a winding roller 16 is rotatably connected to the frame 1. The top ends of the guide rods 15 are fixed to one end of the pull-down cable 17. The other end of the pull-down cable 17 extends downward and is wound around the guide pulley B on the frame 1, and then tensioned and fixed to the winding roller 16. The part of the pull-down cable 17 between the connecting end of the guide rod 15 and the guide pulley B is parallel to the lifting direction of the telescopic bin A12. The winding roller 16 winds up the pull-down cable 17, causing the telescopic bin A12 to move downward to the maximum stroke position against the force of the spring A. At this time, the top of the telescopic bin A12 is flush with the top of the grain bin 2.

[0039] A preheating sleeve 50 is fitted and fixed inside the hot air chamber 5 on the side wall of the bottom grain lifting auger 7. One end of the hot air pipe 9 extends into the hot air chamber 5 and communicates with the preheating sleeve 50. A heating chamber 54 is fitted and fixed at the bottom of the hot air chamber 5 on the side wall of the bottom grain lifting auger 7. The top of the heating sleeve 50 is closed, and the bottom of the heating sleeve 50 extends downward to the bottom plate 52 of the hot air chamber 5. The bottom grain lifting auger 7 passes through the bottom plate of the heating chamber 54. The bottom plate of the heating chamber is connected to the side wall of the bottom grain lifting auger 7. The top of the heating chamber 54 is open, and the top edge of the heating chamber 54 is sealed and fixed to the bottom plate 52 of the hot air chamber. The part of the bottom plate 52 of the hot air chamber between the heating chamber 54 and the bottom lifting auger 7 is evenly provided with multiple ventilation holes 53.

[0040] One end of the hot air pipe 9 that extends into the hot air chamber 5 is connected to the side wall of the heating sleeve 50 via a connecting hose 51.

[0041] The cover tube drive motor 77 is fixed at the bottom of the hot air chamber bottom plate 52 of the hot air chamber 5, within the range corresponding to the heating chamber 54. The top end of the cover tube 48 passes through the heating chamber bottom plate of the heating chamber 54 and is connected to the transmission screw 49 driven by the cover tube drive motor 77.

[0042] The cover tube drive motor 77 is fixed to the bottom plate of the heating chamber 54.

[0043] The bottom plate 52 of the hot air chamber 5 is fixedly connected to the inner wall of the grain silo 2 via the hot air chamber connecting rod 45.

[0044] The top of the hot air chamber 5 is a conical arc surface A55 whose inner diameter increases from top to bottom.

[0045] The bottom of the grain silo 2 is a conical arc surface B42 with an inner diameter decreasing along the top-to-bottom direction. Inside the grain silo 2, corresponding to the upper part of the conical arc surface B42, a flexible stirring ring 76 is rotatably connected. The flexible stirring ring 76 includes an annular wire mesh, a transmission ring 78 fixed to the bottom edge of the annular wire mesh, and an annular wire rope fixed to the top edge of the annular wire mesh. The inner wall of the transmission ring 78 is rotatably connected to the outer wall of the top edge of the conical arc surface B42 through a bearing. The annular wire rope moves along the annular track groove corresponding to the inner wall of the grain silo 2. Multiple stirring protrusions are evenly distributed on the top surface of the annular wire mesh. The stirring protrusions are arranged along the generatrix direction of their respective positions on the flexible stirring ring 76. An stirring drive motor 32 is fixed to the outer wall of the grain silo 2. The stirring drive motor 32 is connected to the transmission ring 78.

[0046] The stirring drive motor 32 is fixed to the outer wall of the grain silo 2 via the transmission box 31. The drive shaft of the stirring drive motor 32 is connected to the input end of the transmission box 31. The end of the power output shaft of the output end of the transmission box 31 extends inward into the grain silo 2 and is connected to the gear ring provided on the outer wall of the transmission ring 78 via the transmission gear.

[0047] The bottom edge of the conical arc surface B42 is sealed and fixed to the top edge of the grain transfer box 10.

[0048] The inner wall of the grain silo 2 is movably connected to the outer wall of the telescopic silo A12 by a telescopic silo B11 with open top and bottom. The outer wall of the telescopic silo A12 matches the inner wall of the telescopic silo B11, and the outer wall of the telescopic silo B11 matches the inner wall of the grain silo 2. Guide risers B14 are fixedly installed on the outer wall of the telescopic silo B11 at positions corresponding to guide risers A13. Guide risers B14 are movably connected vertically within their respective guide risers A13. Guide rods 15 are movably connected vertically within their respective guide risers B14. One end of spring A is fixed to the bottom of guide riser A13, and the other end is fixed to the bottom of guide riser B14. The top end of guide riser B14 extends upward from within limiting ring A. A limiting protrusion A matching the limiting protrusion ring A is provided at the bottom end of the guide riser B14. The restoring force of the spring A with preload force pushes the guide riser B14 upward until the limiting protrusion A and the limiting protrusion ring A make limiting contact. At this time, the telescopic bin B11 extends upward from the grain bin 2 to the maximum stroke. A spring B is provided at the bottom of the guide riser B14, and a limiting protrusion B is provided inward at the top of the guide riser B14. The guide rod 15 extends upward through the limiting protrusion ring B. The bottom end of the guide rod 15 is provided with a limiting protrusion B matching the limiting protrusion ring B. The spring B has a preload force. The restoring force of the spring B with preload force pushes the guide rod 15 upward until the limiting protrusion B and the limiting protrusion ring B make limiting contact. At this time, the telescopic bin A12 extends upward from the telescopic bin B11 to the maximum stroke.

[0049] The pull-down cable 17 is wound up by the winding roller 16, which drives the telescopic bin A12 to move downward relative to the telescopic bin B11 to the maximum stroke position against the force of the spring B. At the same time, it drives the telescopic bin B11 to move downward relative to the grain bin 2 to the maximum stroke position against the force of the spring A. At this time, the top of the telescopic bin A12 and the top of the telescopic bin B11 are flush with the top of the grain bin 2.

[0050] The top of the guide pole 15 extends upwards from the top edge of the telescopic chamber A12 and is provided with a guide pulley C18. The end of the pull-down cable 17 is wrapped around the guide pulley C18 and then fixed to the top of the guide pole 15. The portion of the pull-down cable 17 between the guide pulley B and the guide pulley C18 is arranged parallel to the lifting direction of the telescopic chamber A12.

[0051] When the telescopic bin A12 moves upward relative to the telescopic bin B11 to its maximum stroke under the restoring force of the spring B, the bottom edge of the telescopic bin A12 is lower than the top edge of the telescopic bin B11. When the telescopic bin B11 moves upward relative to the grain bin 2 to its maximum stroke under the restoring force of the spring A, the bottom edge of the telescopic bin B11 is lower than the top edge of the grain bin 2.

[0052] The top end of the guide rod 15 is fixedly connected to the telescopic chamber A12, and the bottom end of the guide rod 15 is slidably connected to the guide riser B14. The top end of the guide riser B14 is fixedly connected to the telescopic chamber B11, and the bottom end of the guide riser B14 is slidably connected to the guide riser A13.

[0053] When the telescopic hopper A12 moves upward to its maximum stroke, the top edge of the telescopic hopper A12 is lower than the lower edge of the grain outlet B26 of the top grain lifting auger 8, which swings to the same axis as the bottom grain lifting auger 7.

[0054] The inner wall of the grain silo 2 and the outer wall of the telescopic silo B11 are slidably connected by a guide mechanism A, and the inner wall of the telescopic silo B11 and the outer wall of the telescopic silo A12 are slidably connected by a guide mechanism B. The guide mechanism A includes multiple guide ribs A fixed to the inner wall of the grain silo 2 and guide ribs B fixed to the outer wall of the telescopic silo B11 and slidably connected to the guide ribs A respectively. The guide mechanism B includes multiple guide ribs C fixed to the inner wall of the telescopic silo B11 and guide ribs D fixed to the outer wall of the telescopic silo A12 and slidably connected to the guide ribs C respectively.

[0055] The guide ribs A are evenly distributed on the inner wall of the grain bin 2. The guide ribs B are evenly distributed on the outer wall of the telescopic bin B11, corresponding to the guide ribs A. The guide ribs C are evenly distributed on the inner wall of the telescopic bin B11. The guide ribs D are evenly distributed on the outer wall of the telescopic bin A12, corresponding to the guide ribs C.

[0056] The guide ribs C are respectively located on the inner side wall of the telescopic chamber B11 at positions corresponding to each guide rib B.

[0057] The side walls of the grain silo 2, the telescopic silo A12, and the telescopic silo B11 are uniformly provided with a plurality of ventilation holes B. The diameter of the ventilation holes B is smaller than that of the ventilation holes A, and the total ventilation area of ​​all ventilation holes B per unit area is smaller than the total ventilation area of ​​all ventilation holes A per unit area.

[0058] Combination Figures 1-10 It is known that the movable grain dryer includes a frame 1. An air heating device 4 and a grain silo with an open top are sequentially fixed to the top of the frame 1 from front to back along the forward direction. A grain inlet hopper 3 is also fixed to the side of the grain silo 2 facing away from the air heating device 4. A grain inlet auger 6 is also fixed to the frame 1. The top surface of one end of the grain inlet auger 6 communicates with the bottom of the grain inlet hopper 3. A hot air chamber 5 is fixed inside the grain silo 2. Multiple air vents A are evenly distributed on the surface of the hot air chamber 5. A bottom lifting device is also fixed inside the grain silo 2. The bottom grain lifting auger 7 is installed inside the hot air chamber 5. The bottom end of the bottom grain lifting auger 7 passes downwards through the bottom of the hot air chamber 5 and the bottom of the grain hopper 2, and connects with the grain inlet auger 6 at one end of the grain hopper 2. The top end of the bottom grain lifting auger 7 passes upwards through the top of the hot air chamber 5 and extends upwards to the top of the grain hopper 2, where it swings to connect with the bottom end of the top grain lifting auger 8. A winch A19 is provided on the outer wall of the grain hopper 2 on the side facing away from the air heating device 4. The lifting cable A wound around the winch A19 is used to lift and drive the top grain lifting auger. When the top grain lifting auger 8 swings to be coaxial with the bottom grain lifting auger 7, the bottom end of the top grain lifting auger 8 is connected to the top end of the bottom grain lifting auger 7 in a limiting connection. Furthermore, the shaft C of the spiral rod C63 inside the top grain lifting auger 8 is connected to the shaft B67 of the spiral rod B46 inside the bottom grain lifting auger 7. The bottom grain lifting auger 7 has a grain inlet 47 on its side wall corresponding to the bottom of the grain silo 2. The side wall of the top grain lifting auger 8 away from the bottom grain lifting auger 7 has a grain outlet A64, and the other side wall also has a discharge outlet. The grain outlet B26 is equipped with an openable and closable gate 29. The axial distance between the grain outlet B26 and the bottom grain lifting auger 7 is less than the distance between the grain outlet A64 and the bottom grain lifting auger 7. The air heating device 4 passes through the side wall of the grain bin 2 and the side wall of the hot air bin 5 in sequence via hot air pipes 9 and communicates with the inside of the hot air bin 5. The bottom sides of the frame 1 are provided with multiple telescopic and adjustable support legs 41 in sequence from front to back along the forward direction. The front end and rear end of the bottom of the frame 1 are also rotatably connected with steering wheels 40 and directional wheels 39.

[0059] The frame 1 is fixed with a grain transfer box 10 at the connection point of the feed auger 6 and the bottom lifting auger 7. The rotating shaft A of the feed auger 6 passes through the grain transfer box 10 at one end of the bottom lifting auger 7 and is connected to the feed drive motor 33 fixed to the grain transfer box 10. The rotating shaft B67 of the bottom lifting auger 7 passes downward through the grain transfer box 10 at one end of the feed auger 6 and is connected to the lifting drive motor 34 fixed to the frame 1. The feed auger 6 conveys the grain in the feed hopper 3 to the grain transfer box 10 and then conveys the grain upward through the bottom lifting auger 7.

[0060] The bottom edge of the bottom grain lifting auger 7 is fixedly connected to the top of the grain transfer box 10 and to the bottom of the grain transfer box 10 through a connecting flange 65. The connecting flange 65 is fixed coaxially to the bottom edge of the bottom grain lifting auger 7 through a grain feeding connecting rod 66. Multiple grain feeding connecting rods 66 are provided and evenly distributed around the axis of the bottom grain lifting auger 7. The grain conveyed by the grain feeding auger 6 into the grain transfer box 10 enters between two adjacent grain feeding connecting rods 66 and is then conveyed upward through the spiral rod B46 inside the bottom grain lifting auger 6.

[0061] The bottom grain lifting auger 7 has a shaft B67 that passes downward through the bottom end of the grain box 10 and is coaxially fixed with a transmission wheel 79. The transmission wheel 79 is connected to the grain lifting drive motor 34.

[0062] The transmission wheel 79 is connected to the drive wheel of the grain lifting drive motor 34 via a transmission belt.

[0063] The swing frame A56, located at the top of the sidewall of the bottom grain lifting auger 7 facing the air heating device 4, and the swing frame B58, located at the bottom of the sidewall of the top grain lifting auger 8 facing the air heating device 4, are oscillatingly connected by a swing shaft 60. A limiting inner sleeve 61 is coaxially provided at the top of the tube wall of the bottom grain lifting auger 7, and a limiting outer sleeve 62, matching the limiting inner sleeve 61, is coaxially provided at the bottom of the tube wall of the top grain lifting auger 8. The top end of the rotating shaft B67 of the screw rod B46 of the top grain lifting auger 7 is fixedly provided with a coupling half shaft A57, and the bottom end of the rotating shaft C of the screw rod C63 of the top grain lifting auger 8 is fixedly provided with a coupling half shaft B59 that matches the coupling half shaft A57. When the top grain lifting auger 8 swings to the coaxial position with the bottom grain lifting auger 7, the limiting outer sleeve 62 is fixedly fitted to the limiting inner sleeve 61, and the coupling half shaft B59 is connected to the coupling half shaft A57 in a transmission connection.

[0064] The inner diameter of the limiting inner sleeve 61 is equal to the inner diameter of the pipe wall of the top grain lifting auger 8.

[0065] The outer wall of the top grain lifting auger 8 is fixedly provided with a grain dropping cover 27 at the position corresponding to the grain outlet A64. The grain outlet A64 is located within the range of the grain dropping cover 27, so that the grain discharged from the grain outlet A64 falls downward and lands at the top center of the hot air chamber 5.

[0066] Two grain outlets A64 are provided, which are arranged opposite to each other on the side of the top grain lifting auger 8 facing the air heating device 4 and the side away from the air heating device 4. The grain dropping cover 27 is a strip-shaped groove fixed to the end of the top grain lifting auger 8 away from the bottom grain lifting auger 7, with the groove opening facing the end of the top grain lifting auger 8 connected to the bottom grain lifting auger 7. The end of the top grain lifting auger 8 is located in the middle of the strip-shaped groove.

[0067] The grain outlet B26 is located between the two grain outlets A64 at the top of the grain lifting auger 8, and the grain outlets A64 are symmetrically located on both sides of the grain outlet B26.

[0068] The distance between the edge of the grain outlet B26 away from the bottom grain lifting auger 7 and the end of the top grain lifting auger 8 facing the bottom grain lifting auger 7 is less than the distance between the edge of the grain outlet A64 near the bottom grain lifting auger 7 and the end of the top grain lifting auger 8 facing the bottom grain lifting auger 7.

[0069] A grain discharge trough 28 is fixed to the side wall of the top grain lifting auger 8, on the side of the grain outlet B26 facing the connection with the bottom grain lifting auger 7. The grain discharge trough 28 is inclined downward along the direction away from the top grain lifting auger 8, and the end of the grain discharge trough 28 away from the top grain lifting auger 8 extends outward from the top of the grain bin 2. The gate 29 is reciprocated along the edge of the grain outlet B26 by a drive cylinder 30 fixed to the end of the top grain lifting auger 8 away from the bottom grain lifting auger 7. The gate 29 is fixedly connected to the piston rod end of the drive cylinder 30.

[0070] The outer wall of the bottom grain lifting auger 7 is fitted with a cover tube 48 corresponding to the position of the grain inlet 47. The cover tube 48 moves up and down along the bottom grain lifting auger 7 by a lifting drive motor 77 fixed in the grain bin 2. When the cover tube 48 moves upward to the maximum stroke, the bottom edge of the cover tube 48 is higher than the top edge of the grain inlet 47. When the cover tube 48 moves downward to the maximum stroke, the cover tube 48 closes the grain inlet 47.

[0071] A cover tube drive motor 77 is fixed on the side wall of the bottom lifting auger 7, above the grain inlet 47. The output shaft of the cover tube drive motor 77 extends downward and is coaxially fixed with a transmission screw 49. The outer side wall of the cover tube 48 is coaxially provided with an external thread that matches and meshes with the transmission screw 49.

[0072] Multiple cover tube drive motors 77 are provided and are evenly distributed around the axis of the bottom lifting auger 7.

[0073] A preheating sleeve 50 is fitted and fixed inside the hot air chamber 5 on the side wall of the bottom grain lifting auger 7. One end of the hot air pipe 9 extends into the hot air chamber 5 and communicates with the preheating sleeve 50. A heating chamber 54 is fitted and fixed at the bottom of the hot air chamber 5 on the side wall of the bottom grain lifting auger 7. The top of the heating sleeve 50 is closed, and the bottom of the heating sleeve 50 extends downward to the bottom plate 52 of the hot air chamber 5. The bottom grain lifting auger 7 passes through the bottom plate of the heating chamber 54. The bottom plate of the heating chamber is connected to the side wall of the bottom grain lifting auger 7. The top of the heating chamber 54 is open, and the top edge of the heating chamber 54 is sealed and fixed to the bottom plate 52 of the hot air chamber. The part of the bottom plate 52 of the hot air chamber between the heating chamber 54 and the bottom lifting auger 7 is evenly provided with multiple ventilation holes 53.

[0074] One end of the hot air pipe 9 that extends into the hot air chamber 5 is connected to the side wall of the heating sleeve 50 via a connecting hose 51.

[0075] The cover tube drive motor 77 is fixed at the bottom of the hot air chamber bottom plate 52 of the hot air chamber 5, within the range corresponding to the heating chamber 54. The top end of the cover tube 48 passes through the heating chamber bottom plate of the heating chamber 54 and is connected to the transmission screw 49 driven by the cover tube drive motor 77.

[0076] The cover tube drive motor 77 is fixed to the bottom plate of the heating chamber 54.

[0077] The bottom plate 52 of the hot air chamber 5 is fixedly connected to the inner wall of the grain silo 2 via the hot air chamber connecting rod 45.

[0078] The top of the hot air chamber 5 is a conical arc surface A55 whose inner diameter increases from top to bottom.

[0079] The bottom of the grain silo 2 is a conical arc surface B42 with an inner diameter that decreases along the top-to-bottom direction.

[0080] Inside the grain silo 2, above the conical arc surface B42, a flexible stirring ring 76 is rotatably connected. The flexible stirring ring 76 includes an annular wire mesh, a transmission ring 78 fixed to the bottom edge of the annular wire mesh, and an annular wire rope fixed to the top edge of the annular wire mesh. The inner wall of the transmission ring 78 is rotatably connected to the outer wall of the top edge of the conical arc surface B42 through a bearing. The annular wire rope moves along the annular track groove corresponding to the inner wall of the grain silo 2. Multiple stirring protrusions are evenly distributed on the top surface of the annular wire mesh. The stirring protrusions are arranged along the generatrix direction of their respective positions on the flexible stirring ring 76. An stirring drive motor 32 is fixed to the outer wall of the grain silo 2. The stirring drive motor 32 is connected to the transmission ring 78.

[0081] The stirring drive motor 32 is fixed to the outer wall of the grain silo 2 via the transmission box 31. The drive shaft of the stirring drive motor 32 is connected to the input end of the transmission box 31. The end of the power output shaft of the output end of the transmission box 31 extends inward into the grain silo 2 and is connected to the gear ring provided on the outer wall of the transmission ring 78 via the transmission gear.

[0082] The bottom edge of the conical arc surface B42 is sealed and fixed to the top edge of the grain transfer box 10.

[0083] A support frame A23 is fixed to the top edge of the outer wall of the grain silo 2 facing the air heating device 4, and a support frame B24 is fixed to the top of the air heating device 4. When the top grain lifting auger 8 swings to the maximum stroke position on the side where the air heating device 4 is located, the top grain lifting auger 8 is supported and fixed by the support frame A23 and the support frame B24 at the same time.

[0084] The support frame A23 is fixed to the top edge of the outer wall of the grain silo 2 by the boss 25.

[0085] The tops of both support frames A23 and B24 are groove-shaped structures that match the sidewalls of the top grain lifting auger 8.

[0086] The top grain lifting auger 8 has a lifting ring A20 fixed to its side wall for fixing to the end of the lifting cable A. When the top grain lifting auger 8 swings to be coaxial with the bottom grain lifting auger 7, the lifting ring A20 is located on the side of the top grain lifting auger 8 that is away from the air heating device 4.

[0087] The top grain lifting auger 8 has symmetrical lifting rings B22 on its sidewalls corresponding to both sides of the frame 1. The outer side wall of the grain bin 2 has winches B at the bottom corresponding to both sides of the frame 1. The end of the lifting cable B of the winch B is fixed to the lifting rings B22.

[0088] The outer wall of the grain silo 2 facing away from the air heating device 4 is provided with an adjustable climbing ladder A21. The upper part of the climbing ladder A21 away from the grain silo 2 is provided with at least one guide pulley A43 for the lifting cable A. When there is one guide pulley A43, it is located at the top of the climbing ladder A21. When there are multiple guide pulleys A43, they are arranged sequentially from top to bottom along the extension of the lifting cable A, with the highest guide pulley A43 located at the top of the climbing ladder A21. The end of the lifting cable A wound by the winch A19 is wrapped around the guide pulley A43 and fixed to the lifting ring A20.

[0089] The top of the outer wall of the grain silo 2 is provided with guide grooves 58 on both sides of the climbing ladder A21, which are matched with the climbing ladder A21. The climbing ladder A21 can be adjusted up and down along the guide grooves 58. The guide grooves 58 are provided with positioning through holes A. The top and bottom of both sides of the climbing ladder A21 are respectively provided with matching positioning through holes B corresponding to the positioning through holes A. When the climbing ladder A21 slides up or down until the positioning through holes B and positioning through holes A are matched, the climbing ladder A21 and the grain silo 2 are fixed in place by positioning pins or positioning bolts.

[0090] When the climbing ladder A21 moves upward and is fixed in place through the positioning through holes B and A at the bottom of the climbing ladder A21, the guide pulley A43 at the top of the climbing ladder A21 is higher than the lifting ring A20 of the top grain lifting auger 8, which is swinging to the same axis as the bottom grain lifting auger 7. When the climbing ladder A21 moves downward and is fixed in place through the positioning through holes B and A at the top of the climbing ladder A21, the bottom of the climbing ladder A21 is in contact with or has a gap with the top of the grain hopper 3, and the guide pulley A43 at the top of the climbing ladder A21 is higher than the top edge of the grain bin 2.

[0091] The inner wall of the grain silo 2 is also movably connected to a telescopic silo A12 with open top and bottom. Multiple guide risers A13 are fixed to the outer wall of the grain silo 2, evenly distributed on the outer wall. Guide rods 15 are fixed to the outer wall of the telescopic silo A12 at positions corresponding to the guide risers A13. A spring A is located at the bottom of each guide riser A13, and a limiting ring A is located at the top of each guide riser A13. The guide rod 15 extends upward through the limiting ring A. The spring A has a preload force; the restoring force of the spring A with the preload force pushes the guide rod 15 upward until its bottom end is limited by the limiting ring A. At this time, the telescopic bin A12 extends upward from the grain bin 2 to its maximum stroke. A winding roller 16 is also rotatably connected to the frame 1. The top of the guide rod 15 is fixed to one end of the pull-down cable 17. The other end of the pull-down cable 17 extends downward and is wound around the guide pulley B on the frame 1, and then tensioned and fixed to the winding roller 16. The part of the pull-down cable 17 between the connecting end of the guide rod 15 and the guide pulley B is parallel to the lifting direction of the telescopic bin A12. The winding roller 16 winds up the pull-down cable 17, causing the telescopic bin A12 to move downward to its maximum stroke against the force of the spring A. At this time, the top of the telescopic bin A12 is flush with the top of the grain bin 2.

[0092] The inner wall of the grain silo 2 is movably connected to the outer wall of the telescopic silo A12 by a telescopic silo B11 with open top and bottom. The outer wall of the telescopic silo A12 matches the inner wall of the telescopic silo B11, and the outer wall of the telescopic silo B11 matches the inner wall of the grain silo 2. Guide risers B14 are fixedly installed on the outer wall of the telescopic silo B11 at positions corresponding to guide risers A13. Guide risers B14 are movably connected vertically within their respective guide risers A13. Guide rods 15 are movably connected vertically within their respective guide risers B14. One end of spring A is fixed to the bottom of guide riser A13, and the other end is fixed to the bottom of guide riser B14. The top end of guide riser B14 extends upward from within limiting ring A. A limiting protrusion A matching the limiting protrusion ring A is provided at the bottom end of the guide riser B14. The restoring force of the spring A with preload force pushes the guide riser B14 upward until the limiting protrusion A and the limiting protrusion ring A make limiting contact. At this time, the telescopic bin B11 extends upward from the grain bin 2 to the maximum stroke. A spring B is provided at the bottom of the guide riser B14, and a limiting protrusion B is provided inward at the top of the guide riser B14. The guide rod 15 extends upward through the limiting protrusion ring B. The bottom end of the guide rod 15 is provided with a limiting protrusion B matching the limiting protrusion ring B. The spring B has a preload force. The restoring force of the spring B with preload force pushes the guide rod 15 upward until the limiting protrusion B and the limiting protrusion ring B make limiting contact. At this time, the telescopic bin A12 extends upward from the telescopic bin B11 to the maximum stroke.

[0093] The pull-down cable 17 is wound up by the winding roller 16, which drives the telescopic bin A12 to move downward relative to the telescopic bin B11 to the maximum stroke position against the force of the spring B. At the same time, it drives the telescopic bin B11 to move downward relative to the grain bin 2 to the maximum stroke position against the force of the spring A. At this time, the top of the telescopic bin A12 and the top of the telescopic bin B11 are flush with the top of the grain bin 2.

[0094] The top of the guide pole 15 extends upwards from the top edge of the telescopic chamber A12 and is provided with a guide pulley C18. The end of the pull-down cable 17 is wrapped around the guide pulley C18 and then fixed to the top of the guide pole 15. The portion of the pull-down cable 17 between the guide pulley B and the guide pulley C18 is arranged parallel to the lifting direction of the telescopic chamber A12.

[0095] When the telescopic bin A12 moves upward relative to the telescopic bin B11 to its maximum stroke under the restoring force of the spring B, the bottom edge of the telescopic bin A12 is lower than the top edge of the telescopic bin B11. When the telescopic bin B11 moves upward relative to the grain bin 2 to its maximum stroke under the restoring force of the spring A, the bottom edge of the telescopic bin B11 is lower than the top edge of the grain bin 2.

[0096] The top end of the guide rod 15 is fixedly connected to the telescopic chamber A12, and the bottom end of the guide rod 15 is slidably connected to the guide riser B14. The top end of the guide riser B14 is fixedly connected to the telescopic chamber B11, and the bottom end of the guide riser B14 is slidably connected to the guide riser A13.

[0097] When the telescopic hopper A12 moves upward to its maximum stroke, the top edge of the telescopic hopper A12 is lower than the lower edge of the grain outlet B26 of the top grain lifting auger 8, which swings to the same axis as the bottom grain lifting auger 7.

[0098] A climbing ladder B35 is fixed to the outer wall of the grain silo 2 on the side facing away from the air heating device 4. The bottom end of the climbing ladder B35 extends upward to the frame 1, and the top end of the climbing ladder B35 extends upward to the top edge of the grain silo 2. A climbing ladder C36 is also fixed to the outer wall of the telescopic silo A12 at the position corresponding to the climbing ladder B35. The top end of the climbing ladder C36 is fixed to the telescopic silo A12, and the bottom end of the climbing ladder C36 is slidably connected to the climbing ladder B35.

[0099] The climbing ladder B35 has multiple retaining rings A at equal intervals along its extension direction to form a protective cage A37 on the side facing away from the grain silo 2. The climbing ladder C36 has multiple retaining rings B at equal intervals along its extension direction to form a protective cage B38 on the side facing away from the grain silo 2. Both the protective cage B38 and the climbing ladder C36 are located within the area enclosed by the protective cage A37 and the climbing ladder B35.

[0100] The inner wall of the grain bin 2 and the outer wall of the telescopic bin B11 are slidably connected by a guide mechanism A, and the inner wall of the telescopic bin B11 and the outer wall of the telescopic bin A12 are slidably connected by a guide mechanism B.

[0101] The guiding mechanism A includes multiple guide ribs A fixed to the inner wall of the grain bin 2 and guide ribs B fixed to the outer wall of the telescopic bin B11, which are slidably connected to the guide ribs A respectively. The guiding mechanism B includes multiple guide ribs C fixed to the inner wall of the telescopic bin B11 and guide ribs D fixed to the outer wall of the telescopic bin A12, which are slidably connected to the guide ribs C respectively.

[0102] The guide ribs A are evenly distributed on the inner wall of the grain bin 2. The guide ribs B are evenly distributed on the outer wall of the telescopic bin B11, corresponding to the guide ribs A. The guide ribs C are evenly distributed on the inner wall of the telescopic bin B11. The guide ribs D are evenly distributed on the outer wall of the telescopic bin A12, corresponding to the guide ribs C.

[0103] The guide ribs C are respectively located on the inner side wall of the telescopic chamber B11 at positions corresponding to each guide rib B.

[0104] The outer side wall of the grain silo 2 is also uniformly fixed with a number of reinforcing vertical ribs and a number of reinforcing ring ribs. The reinforcing vertical ribs extend downward from the top open edge of the side wall of the grain silo 2 to the connection between the side wall of the grain silo 2 and the bottom of the grain silo 2. The reinforcing ring ribs are wound and fixed to the side wall of the grain silo 2, and the reinforcing ring ribs are parallel to the top open edge of the grain silo 2.

[0105] The reinforcing vertical ribs are evenly distributed on the outer side wall of the grain silo 2, and the reinforcing ring ribs evenly divide the side wall of the grain silo 2 into multiple parts from top to bottom.

[0106] The outer wall of the conical arc surface B42 at the bottom of the grain silo 2 is provided with a plurality of reinforcing busbars, and the reinforcing busbars are respectively provided in correspondence with the reinforcing vertical bars.

[0107] The side walls of the grain silo 2, the telescopic silo A12, and the telescopic silo B11 are uniformly provided with a plurality of ventilation holes B. The diameter of the ventilation holes B is smaller than that of the ventilation holes A, and the total ventilation area of ​​all ventilation holes B per unit area is smaller than the total ventilation area of ​​all ventilation holes A per unit area.

[0108] The lower part of the side wall of the grain silo 2 is also provided with an inspection outlet (not shown in the attached drawings of the instruction manual). At the location of the inspection outlet, there is an openable and closable sample discharge gate. The outer side wall of the grain silo 2, corresponding to the lower edge of the inspection outlet, is provided with a sample discharge guide trough.

[0109] The two sides of the grain bin 2 are flush with the two sides of the frame 1.

[0110] The air heating device 4 blows heated air into the hot air duct 9 through a fan 44 fixed to the frame 1.

[0111] The steering wheel 40 is connected to the frame 1 via the bogie 73, and the rotating vertical shaft of the bogie 73 is oscillatingly connected to the frame 1.

[0112] The support leg 41 includes a lifting and adjusting transmission box 68 fixed to the bottom of the frame 1. The bottom of the lifting and adjusting transmission box 68 is fixed with a support sleeve 69 of a polygonal prism structure. The support sleeve 69 is provided with a support column 70 that matches the polygonal prism structure. The adjusting output screw 74 of the lifting and adjusting transmission box 68 extends downward to the bottom of the lifting and adjusting transmission box 5 and is located within the range of the support sleeve 69. The top of the support column 70 is provided with a threaded hole that matches and connects with the adjusting output screw 74. The adjusting output screw 74 is threadedly connected to the support column 70 through the threaded hole. The adjusting input shaft 72 of the lifting and adjusting transmission box 68 is located on the side wall of the lifting and adjusting transmission box 68. When the support column 70 moves upward along the support sleeve 69 to the maximum stroke, the bottom end of the support column 70 is higher than the plane where the bottom ends of the steering wheel 40 and the directional wheel 39 are located. When the support column 70 moves downward along the support sleeve 69 to the maximum stroke, the bottom end of the support column 70 is lower than the plane where the bottom ends of the steering wheel 40 and the directional wheel 39 are located.

[0113] An annular buffer pad 75 is fixed to the top of the support column 70, and the adjusting output screw 74 passes downward through the annular buffer pad 75 and connects to the threaded hole of the support column 70.

[0114] An enlarged base plate 71 is fixed to the bottom end of the support column 70, and the floor area of ​​the enlarged base plate 71 is larger than the cross-sectional area of ​​the support column 70.

[0115] The top surface of the enlarged base plate 71 is uniformly fixed with multiple connecting ribs 80 around the support column 70. One side of the connecting rib 80 is fixed to the support column 70, and the other side is fixed to the enlarged base plate 71.

[0116] The adjustment input shaft 72 is located on the side wall of the lifting adjustment transmission box 68 on the side corresponding to the outer side of the frame 1.

[0117] The support legs 41 on both sides of the frame 1 are symmetrically arranged.

[0118] The frame 1 is provided with support legs 41 on the front and rear sides of the directional wheel 39 and the front and rear sides of the steering wheel 40, respectively.

[0119] The adjustment output screw 74 of the lifting and adjusting transmission box 68 is connected to the adjustment input shaft 72 by a worm gear transmission. The portion of the adjustment input shaft 72 located inside the lifting and adjusting transmission box 68 is coaxially fixed with a worm gear, and the portion of the adjustment output screw 74 located inside the lifting and adjusting transmission box 68 is coaxially fixed with a worm gear that meshes with the worm gear.

[0120] When using this application, the operating steps are as follows: The tractor unit is connected to the bogie 73 at the rear, allowing it to tow the grain dryer to the location where the grain needs to be dried.

[0121] After the tractor pulls the grain dryer to the corresponding location, the adjustment input shaft 72 of each support leg 41 is operated to make the support leg 41 contact the ground and lift the frame 1 until the directional wheel 39 and the steering wheel 40 are separated from the ground, thus ensuring the level and stability of the frame 1.

[0122] Then, using winch B, the lifting cable B used to fix the top grain lifting auger 8 to support frame A23 and support frame B24 is loosened to a sufficient length to avoid restricting the upward swing of the top grain lifting auger 8; next, the climbing ladder A21 is moved upward until the positioning through hole B at the bottom of the climbing ladder A21 corresponds to the positioning through hole A of the grain bin 2, and the climbing ladder A21 is fixed to the grain bin 2 by positioning pins or positioning bolts; then, the top grain lifting auger 8 is swung upward by the lifting cable A driven by winch A19 until it is coaxially fixed with the bottom grain lifting auger 7, and then the top grain lifting auger 8 is swung upward by winch B. The lifting cable B is tensioned, and the lifting cable A is also tensioned via winch A19. After ensuring that the tension of lifting cables B and A is the same, winch A19 and winch B are fixed. At this point, lifting cables A and B provide three-point fixation for the top grain-lifting auger 8. Then, the winding roller 16 is rotated, causing multiple pull-down cables 17 to be unwound synchronously and at the same speed from the winding roller 16. This causes the telescopic bins A12 and B11 to automatically extend upwards to their maximum stroke under the simultaneous action of the restoring forces of springs A and B. Then, the winding roller 16 is fixed. This completes the preparations before grain drying.

[0123] Then, the air heating device 4 and the fan 44 are started respectively, so that the heated air is blown into the preheating sleeve 50 of the hot air chamber 5 through the hot air pipe 9, and enters the preheating chamber 54 downward from the vent holes 53 of the bottom plate 52 of the hot air chamber within the range of the preheating sleeve 50. This heats the area of ​​the bottom grain lifting auger 7 corresponding to the positions of the preheating sleeve 50 and the preheating chamber 54 respectively. Then, the hot air in the preheating chamber 54 enters the hot air chamber 5 upward through the vent holes 53 of the bottom plate 52 of the hot air chamber between the preheating chamber 54 and the preheating sleeve 50, thus heating the hot air chamber 5. The hot air in the hot air chamber 5 then enters the hot air chamber 5 upward through the vent holes 53 of the bottom plate 52 of the hot air chamber between the preheating chamber 54 and the preheating sleeve 50, thus heating the hot air chamber 5. The vent A in section 5 blows outward, allowing hot air to enter the grain silo 2. Since hot air is lighter than air, a large amount of hot air in the grain silo 2 flows upward along the grain silo 2, and after passing through the telescopic chambers B11 and A12, it overflows from the top of the telescopic chamber A12. Furthermore, as the hot air in the grain silo 2 flows upward, the hot air near the side walls of the grain silo 2, the side walls of the telescopic chamber B11, and the side walls of the telescopic chamber A12 will escape outward through the vent B, thereby achieving preheating of the grain silo 2, the telescopic chamber B11, and the telescopic chamber A12, and avoiding drying of residual water vapor in the grain dryer equipment or hot air pipes.

[0124] After the grain dryer is preheated, the lifting drive motor 77 drives the transmission screw 49 to move the cover tube 48 to close the grain inlet 47, and the drive cylinder 30 drives the gate 29 to close the grain outlet B26. Then, the grain to be dried is put into the grain inlet hopper 3, and the stirring drive motor 32, the grain inlet drive motor 33, and the grain lifting drive motor 34 are started. At this time, the grain in the grain inlet hopper 3 is transported to the grain transfer box 10 through the grain inlet auger 6. Then, the grain in the grain transfer box 10 is sequentially conveyed upward through the bottom grain lifting auger 7 and the top grain lifting auger 8. The grain in the top grain lifting auger 8 leaves the top grain lifting auger 8 through the grain outlet A64, and under the action of the grain dropping cover 27, the grain leaving the top grain lifting auger 8 falls vertically downward, so that the grain falls as close as possible to the top center of the conical arc surface A55 of the hot air chamber 5, and then the grain falling on the conical arc surface A55 slides down along the conical arc surface A55. As the grain slides down from the bottom edge of the conical surface A55, it falls onto the flexible stirring ring 76. Under the rotation of the flexible stirring ring 76, centrifugal force allows some of the grain to overcome gravity and remain on the flexible stirring ring 76. Furthermore, under the action of the stirring protrusion on the flexible stirring ring 76, some of the grain on the flexible stirring ring 76 is lifted up again. Some of the grain on the flexible stirring ring 76 will fall to the bottom of the grain bin 2 at the conical surface B42 due to the inability of centrifugal force to overcome gravity, and gather at the opening 47 of the bottom grain lifting auger 7.

[0125] In the above process, the grain is preheated and dried when it rises to the corresponding positions of the preheating chamber 54 and the preheating sleeve 50 through the bottom grain lifting auger 7. Then, the grain falls from the grain outlet A64 of the top grain lifting auger 8 and enters the telescopic chambers A12, B11, and 2 before contacting the conical arc surface A55 of the hot air chamber 5. During this process, the rising hot air blown from the hot air chamber 5 into the grain 2, telescopic chambers B11, and A12, with an air pressure slightly higher than the outside atmospheric pressure, will convect with the falling grain, thereby heating and drying the grain. After the grain falls onto the conical arc surface A55 of the hot air chamber 5, the hot air with a certain pressure generated by the fan 44 in the hot air chamber 5 is blown out through the vent holes A, thereby heating and drying the grain on the conical arc surface A55 and the grain falling between the side wall of the hot air chamber 5 and the side wall of the grain 2.

[0126] After all the grain in the feed hopper 3 has been transferred, the wall feed drive motor 33 is turned off, and the lifting drive motor 77 drives the transmission screw 49 to move the cover tube 48 upward to open the feed inlet 47. At this time, the grain in the conical arc surface B42 of the grain bin 2 is directly transferred from the feed inlet 47 to the discharge outlet A64 through the bottom lifting auger 7 and the top lifting auger 8, thus achieving cyclic heating and drying of the grain in the grain bin 2.

[0127] After circulating heating for a period of time, the sample discharge gate at the grain outlet is opened, so that some of the grain inside the grain bin 2 is discharged from the grain outlet to the sample discharge guide chute and falls along the discharge guide chute to the sample collection device for testing the current drying status inside the grain bin 2. After the grain used to test the drying status is collected, the sample discharge gate is closed.

[0128] If the collected grain samples have not yet met the drying requirements, drying continues for the corresponding time based on the sample's drying level and drying experience. During this continued drying, the lifting drive motor 77 can drive the transmission screw 49 to move the cover tube 48 to adjust the opening degree of the grain inlet 47. After the corresponding drying time has been completed, the samples are inspected again. If the collected grain samples meet the drying requirements, the drive cylinder 30 can drive the gate 29 to open the grain outlet B26. At this time, the grain in the conical arc surface B42 of the grain bin 2 flows directly from the grain inlet 47 through the bottom lifting mechanism. The grain auger 7 and the top lifting auger 8 convey the grain to the grain outlet B26 again for discharge, and the grain leaves the grain bin 2 along the grain outlet trough 28. After all the grain in the grain bin 2 has been discharged, the above actions are repeated. The lifting drive motor 77 drives the transmission screw 49 to move the cover tube 48 to close the grain inlet 47, the drive cylinder 30 drives the gate 29 to move to close the grain outlet B26, and the grain inlet drive motor 33 is started again. The previous steps are repeated to put the remaining grain that needs to be dried into the grain inlet hopper 3 for another batch of grain drying.

[0129] During the grain drying process, staff can observe the grain in grain bin 2, telescopic bin B11 and telescopic bin A12 through climbing ladders B35 and C, and can also pour the grain for sampling from the top of telescopic bin A12 back into grain bin 2.

[0130] After all the grains requiring drying have been dried and discharged from grain silo 2, the air heating device 4 is turned off. Then, the fan 44, bottom lifting auger 7, top lifting auger 8, and flexible stirring ring 76 continue to run for a period of time to allow the equipment to cool down. After cooling, the lifting drive motor 77 drives the transmission screw 49 to move the cover tube 48 to close the grain inlet 47, and the drive cylinder 30 drives the gate plate 29 to close the grain outlet B26. The stirring drive motor 32 and the grain lifting drive motor 34 are turned off, and the fan 44 is shut down. Then, by rotating the winding roller 16, multiple pull-down cables 17 are wound synchronously and at the same speed onto the winding roller 16. This causes the telescopic bins A12 and B11 to simultaneously overcome the restoring forces of spring A and spring B, respectively, causing them to move downwards simultaneously to the extension... The top edges of the shrinking bin A12 and the telescopic bin B11 are flush with the top edge of the grain bin 2. Then, the winding roller 16 is fixed. Next, the winch B is loosened so that the length of the unwound lifting cable B is sufficient for the top grain lifting auger 8 to swing. Then, the lifting cable A is unwound by the winch A19, so that the top grain lifting auger 8 swings toward the air heating device 4 until it is placed on the support frame A23 and support frame B24. Then, the winch B is tightened again to tension the lifting cable B, thereby fixing the top grain lifting auger 8 that is laid down on the support frame A23 and support frame B24.

[0131] Finally, by operating the adjustment input shaft 72 of each support leg 41, the support leg 41 is separated from the ground, and the directional wheel 39 and the steering wheel 40 are in contact with the ground. The tractor is then connected to the bogie 73 through the rear of the tractor, so that the tractor can pull the grain dryer to the place where the grain needs to be dried for the grain drying operation.

[0132] This not only allows the grain dryer to easily traverse rural paths and reach places where grain needs to be dried on-site, but also ensures the drying effect through the structure of the dryer's grain silo and grain conveying drying mechanism.

[0133] The grain-lifting auger structure of the dryer not only improves the efficiency of upward grain conveying, but also ensures that the grain falls at the top center of the hot air chamber after conveying, thus allowing the grain to have more contact with the hot air in the hot air chamber and further improving the grain drying effect.

[0134] The grain dryer's auger structure allows the top auger to swing downwards and be fixed to the air heating device during turnover, thereby reducing the height of the grain dryer and improving its throughput and turnover stability.

[0135] The hot air chamber structure inside the grain silo allows for the effective drying of grain that has been conveyed to the top of the silo by the grain lifting auger and then dropped into the silo.

[0136] The grain is pre-dried by the bottom grain lifting auger extending upwards from the hot air chamber, thereby improving the grain drying efficiency.

[0137] The retractable silo structure of the grain warehouse not only allows more grain to be dried inside, but also concentrates the heat from the hot air chamber within the grain warehouse and the retractable silo, requiring a longer time to escape from the top of the retractable silo, thus further improving the grain drying efficiency.

[0138] The grain stirring mechanism inside the grain silo continuously stirs the grain, thereby improving the heat exchange effect. This not only allows the grain accumulated in the lower part of the silo to still have good heat exchange with the hot air chamber, but also allows the moisture generated by the drying of the grain in the lower part of the silo to be discharged in a timely and effective manner, thus further improving the drying effect of the grain.

[0139] The grain inlet structure at the bottom of the grain lifting auger and the grain outlet B structure at the top of the grain lifting auger enable the dried grain inside the grain silo to be discharged and collected.

[0140] By determining the positional relationship between outlet B and outlet A, grain in the granary is prevented from overflowing from outlet A when it is discharged through outlet B, thus ensuring the efficiency of grain discharge from the granary.

[0141] The top grain lifting auger can be easily swung by the winch A and the lifting cable A. This allows the operator to swing the top grain lifting auger to be coaxial with the bottom grain lifting auger when the grain needs to be dried, or to swing the top grain lifting auger to be placed on top of the air heating device when the grain dryer needs to be moved around.

[0142] The action of winch B and lifting cable B makes the top lifting auger, which swings to the same axis as the bottom lifting auger, more stable.

[0143] The telescopic bin extends upwards during grain drying and retracts during turnover thanks to the pull-down cable wound around the rotating roller, making operation more convenient and stable.

[0144] By matching the structure at the bottom of the top lifting auger with the structure at the top of the bottom lifting auger, it is ensured that when the top lifting auger swings to be coaxial with the bottom lifting auger, the grain will not overflow at the connection between the top and bottom lifting augers during the lifting process, thus ensuring the normal and effective lifting of the grain.

[0145] The heating sleeve and heating chamber structure installed inside the hot air chamber enable the grain to be heated and dried each time it is lifted upward by the bottom lifting auger, thus ensuring the drying effect of the grain.

[0146] By using a transmission structure with a top and bottom grain lifting auger, one power source can be reduced, thereby lowering costs and simplifying the structure.

[0147] The lifting auger is driven by a grain lifting drive motor at the bottom of the frame and a transmission wheel at the bottom of the lifting auger, thereby maximizing the ground clearance of the bottom of the frame and improving the passability of the grain dryer during turnover.

[0148] The climbing ladder structure installed in the grain silo makes it easy for staff to observe the situation inside the silo and to maintain and repair the equipment.

[0149] The grain outlet and its structure in the grain warehouse facilitate the observation and inspection of the grain drying process inside.

[0150] The bottom of the bottom grain lifting auger is connected to the grain rotating box via a grain inlet connecting rod, which ensures both the connection and fixation between the bottom grain lifting auger and the grain rotating box, as well as the lifting efficiency of the bottom grain lifting auger.

[0151] The hot air duct is connected to the heating sleeve through a connecting hose, which ensures that the hot air can heat the grain in the bottom grain lifting auger, while also preventing the vibration generated during the grain lifting process of the bottom grain lifting auger from damaging the hot air chamber with vent holes A through the hot air duct.

[0152] The support legs, with their telescopic adjustment mechanism, provide support during grain drying and ensure the machine frame remains level. They can also be retracted for transport to avoid disrupting the process.

[0153] By adjusting the structure of the transmission box, operators can easily and conveniently lift and support the frame or retract it, reducing the labor intensity of the operators.

[0154] The adjustment input shaft of the lifting and adjusting transmission box is located on the outer side of the frame, which further facilitates the operation of the lifting and adjusting transmission box by the operator.

[0155] By expanding the base plate, the contact area with the ground is increased, thereby reducing the pressure on the ground and thus more effectively lifting the frame.

[0156] The adjustment output screw and adjustment input shaft of the lifting and adjusting transmission box are connected by a worm gear transmission. This not only reduces the labor intensity of operators adjusting the support legs, but also has a self-locking characteristic. That is, when the operator drives the support column to adjust up and down relative to the support sleeve to a certain height by rotating the adjustment input shaft, the support leg will not automatically drive the worm gear to rotate under pressure, thus keeping the support leg at that specific height.

[0157] By strengthening the vertical ribs, the ring ribs, and the main ribs, the strength of the grain silo is improved, preventing the pressure from the grain inside from deforming or even damaging the silo, thereby increasing the amount of grain that can be dried in the silo.

[0158] By utilizing the ventilation holes A in the open-top grain silo and hot air chamber, the hot air inside the hot air chamber can be evenly distributed within the grain silo before flowing upwards, thus effectively drying the grain inside the silo and the grain falling into it.

[0159] Through the air vent B, and the pore size and unit air permeability of air vent B relative to air vent A, the hot air with high moisture content generated during the drying of the grain in the grain silo can be discharged in a timely manner through air vent B, avoiding the need for a longer drying time due to the inability to effectively remove moisture from the hot air.

Claims

1. A telescopic grain silo for a portable grain dryer, characterized in that: The equipment includes a frame (1), on which an air heating device (4) and a grain silo (2) with an open top are fixed sequentially from front to back along the forward direction. A grain feed hopper (3) is also fixed on the side of the grain silo (2) facing away from the air heating device (4). A grain feed auger (6) is also fixed on the frame (1). The top surface of one end of the grain feed auger (6) is connected to the bottom of the grain feed hopper (3). A hot air chamber (5) is fixed inside the grain silo (2). Multiple ventilation holes A are evenly provided on the surface of the hot air chamber (5). A bottom lifting auger (7) is also fixed inside the grain silo (2). The bottom lifting auger (7) passes through the hot air chamber (5). The bottom end of the bottom lifting auger (7) passes downward through the hot air chamber (5). The bottom of the air silo (5) and the bottom of the grain silo (2) are connected to the grain feed auger (6) at one end of the grain silo (2). The top of the bottom grain lifting auger (7) passes through the top of the hot air silo (5) and extends upward to the top of the grain silo (2) and swings to the bottom of the top grain lifting auger (8). The outer wall of the grain silo (2) facing away from the air heating device (4) is provided with a winch A (19). The lifting cable A wound around the winch A (19) is used to lift and drive the top grain lifting auger (8). The air heating device (4) passes through the side wall of the grain silo (2) and the side wall of the hot air silo (5) in sequence through the hot air pipe (9) and is connected to the inside of the hot air silo (5). The inner wall of the grain silo (2) is also movably connected with an extension that is open at both the top and bottom. The telescopic silo A (12) has multiple guide risers A (13) fixed on the outer wall of the grain silo (2). The guide risers A (13) are evenly distributed on the outer wall of the grain silo (2). The telescopic silo A (12) has guide rods (15) fixed on the outer wall of the telescopic silo A (12) at the positions corresponding to the guide risers A (13). The bottom of the guide riser A (13) is provided with a spring A. The top of the guide riser A (13) is provided with a limiting protrusion A. The guide rod (15) extends upward through the limiting protrusion A. The spring A has a pre-compression force. The restoring force of the spring A with the pre-compression force pushes the guide rod (15) upward until the bottom of the guide rod (15) is limited by the limiting protrusion A. At this time, the telescopic silo A (12) extends upward out of the grain silo. (2) At the maximum stroke, a winding roller (16) is rotatably connected to the frame (1). The top of the guide rod (15) is fixed to one end of the pull-down cable (17). The other end of the pull-down cable (17) extends downward and is wound around the guide pulley B on the frame (1) and then tensioned and fixed on the winding roller (16). The part of the pull-down cable (17) between the connecting end of the guide rod (15) and the guide pulley B is parallel to the lifting direction of the telescopic bin A (12). The pull-down cable (17) is wound up by the winding roller (16), which drives the telescopic bin A (12) to move downward to the maximum stroke against the force of the spring A. At this time, the top of the telescopic bin A (12) is flush with the top of the grain bin (2).

2. The telescopic grain silo of the movable grain dryer as described in claim 1, characterized in that: The side wall of the bottom grain lifting auger (7) is fitted with a preheating sleeve (50) inside the hot air chamber (5). One end of the hot air pipe (9) extends into the hot air chamber (5) and is connected to the preheating sleeve (50). The side wall of the bottom grain lifting auger (7) is fitted with a heating chamber (54) at the bottom of the hot air chamber (5). The top of the heating sleeve (50) is closed, and the bottom of the heating sleeve (50) extends downward to the bottom plate (52) of the hot air chamber (5). The bottom grain lifting auger (7) passes through the bottom plate of the heating chamber (54). The bottom plate of the heating chamber is connected to the side wall of the bottom grain lifting auger (7). The top of the heating chamber (54) is open. The top edge of the heating chamber (54) is sealed and fixed to the bottom plate (52) of the hot air chamber. The part of the bottom plate (52) of the hot air chamber between the heating chamber (54) and the bottom lifting auger (7) is evenly provided with multiple ventilation holes (53).

3. The telescopic grain silo of the movable grain dryer as described in claim 1, characterized in that: The bottom of the grain silo (2) is a conical arc surface B (42) with an inner diameter decreasing along the top-to-bottom direction. A flexible stirring ring (76) is rotatably connected inside the grain silo (2) above the conical arc surface B (42). The flexible stirring ring (76) includes an annular wire mesh, a transmission ring (78) fixed to the bottom edge of the annular wire mesh, and an annular wire rope fixed to the top edge of the annular wire mesh. The inner wall of the transmission ring (78) is rotatably connected to the outer wall of the top edge of the conical arc surface B (42) through a bearing. The annular wire rope moves along the annular track groove corresponding to the inner wall of the grain silo (2). Multiple stirring protrusions are evenly distributed on the top surface of the annular wire mesh. The stirring protrusions are set along the generatrix direction of their respective positions on the flexible stirring ring (76). A stirring drive motor (32) is fixed on the outer wall of the grain silo (2). The stirring drive motor (32) is connected to the transmission ring (78) for transmission.

4. The telescopic grain silo of the movable grain dryer as described in claim 3, characterized in that: The stirring drive motor (32) is fixed to the outer wall of the grain silo (2) through the transmission box (31). The drive shaft of the stirring drive motor (32) is connected to the input end of the transmission box (31). The end of the power output shaft of the output end of the transmission box (31) extends into the grain silo (2) and is connected to the gear ring provided on the outer wall of the transmission ring (78) through the transmission gear.

5. The telescopic grain silo of the movable grain dryer as described in claim 1, characterized in that: The inner wall of the grain silo (2) and the outer wall of the telescopic silo A (12) are connected vertically to a telescopic silo B (11) with open top and bottom. The outer wall of the telescopic silo A (12) matches the inner wall of the telescopic silo B (11), and the outer wall of the telescopic silo B (11) matches the inner wall of the grain silo (2). The outer wall of the telescopic silo B (11) is fixed with a guide tube B (14) at the position corresponding to the guide tube A (13). The guide tube B (14) is connected vertically along the corresponding guide tube A (13). The guide rod (15) is connected vertically along the corresponding guide tube B (14). One end of the spring A is fixed to the bottom of the guide tube A (13), and the other end is fixed to the bottom of the guide tube B (14). The top end of the guide tube B (14) extends upward from the limiting protrusion A. Extending out, the bottom end of the guide riser B (14) is provided with a limiting protrusion A that matches the limiting protrusion A. The restoring force of the spring A with pre-compression force pushes the guide riser B (14) upward until the limiting protrusion A and the limiting protrusion A make contact. At this time, the telescopic bin B (11) extends upward from the grain bin (2) to the maximum stroke. The bottom of the guide riser B (14) is provided with a spring B. The top of the guide riser B (14) is provided with a limiting protrusion B. The guide rod (15) extends upward through the limiting protrusion B. The bottom end of the guide rod (15) is provided with a limiting protrusion B that matches the limiting protrusion B. The spring B has a pre-compression force. The restoring force of the spring B with pre-compression force pushes the guide rod (15) upward until the limiting protrusion B and the limiting protrusion B make contact. At this time, the telescopic bin A (12) extends upward from the telescopic bin B (11) to the maximum stroke.

6. The telescopic grain silo of the movable grain dryer as described in claim 5, characterized in that: The pull-down cable (17) is wound up by the winding roller (16), which drives the telescopic bin A (12) to move downward relative to the telescopic bin B (11) to the maximum stroke position against the force of the spring B, and at the same time drives the telescopic bin B (11) to move downward relative to the grain bin (2) to the maximum stroke position against the force of the spring A. At this time, the top of the telescopic bin A (12) and the top of the telescopic bin B (11) are flush with the top of the grain bin (2).

7. The telescopic grain silo of the movable grain dryer as described in claim 5, characterized in that: When the telescopic bin A (12) moves upward relative to the telescopic bin B (11) to its maximum stroke under the restoring force of the spring B, the bottom edge of the telescopic bin A (12) is lower than the top edge of the telescopic bin B (11). When the telescopic bin B (11) moves upward relative to the grain bin (2) to its maximum stroke under the restoring force of the spring A, the bottom edge of the telescopic bin B (11) is lower than the top edge of the grain bin (2).

8. The telescopic grain silo of the movable grain dryer as described in claim 5, characterized in that: The top end of the guide rod (15) is fixedly connected to the telescopic chamber A (12), and the bottom end of the guide rod (15) is slidably connected to the guide riser B (14). The top end of the guide riser B (14) is fixedly connected to the telescopic chamber B (11), and the bottom end of the guide riser B (14) is slidably connected to the guide riser A (13).

9. The telescopic grain silo of the movable grain dryer as described in claim 5, characterized in that: The inner wall of the grain silo (2) and the outer wall of the telescopic silo B (11) are slidably connected by a guide mechanism A, and the inner wall of the telescopic silo B (11) and the outer wall of the telescopic silo A (12) are slidably connected by a guide mechanism B. The guide mechanism A includes multiple guide ribs A fixed to the inner wall of the grain silo (2) and guide ribs B fixed to the outer wall of the telescopic silo B (11) that are slidably connected to the guide ribs A respectively. The guide mechanism B includes multiple guide ribs C fixed to the inner wall of the telescopic silo B (11) and guide ribs D fixed to the outer wall of the telescopic silo A (12) that are slidably connected to the guide ribs C respectively.

10. The telescopic grain silo of the movable grain dryer as described in claim 5, characterized in that: The side walls of the grain silo (2), the telescopic silo A (12), and the telescopic silo B (11) are uniformly provided with a plurality of ventilation holes B. The diameter of the ventilation holes B is smaller than that of the ventilation holes A, and the ventilation area of ​​all ventilation holes B per unit area is smaller than that of all ventilation holes A per unit area.

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