Agricultural grain rapid drying apparatus and method

Abstract

The present application relates to the technical field of grain drying, and specifically discloses a kind of agricultural product grain rapid drying equipment and method, including multilayer tower body, the surface of tower body is equipped with hot air system for drying grain in the inside of tower body, the inside of each layer of tower body is equipped with multilayer drying chamber, the inside of drying chamber is equipped with multiple groups of angular tube, the lower end of drying chamber is equipped with detection assembly for detecting the moisture content of grain in the inside of drying chamber;The present application is equipped with sampling outer tube, sealing half pipe and protection tube, detection probe is located in the inside of sampling outer tube and sealing half pipe in non-detection state, to prevent high temperature from affecting service life and detection accuracy, detection probe is located in the inside of protection tube in sampling state, also prevent high temperature from affecting service life and detection accuracy, grain enters the inside of sampling outer tube and sealing half pipe for static detection, ensure the moisture content detection accuracy of grain, then cooperate with hot air system, to ensure better drying effect.

Description

Technical Field

[0001] This invention relates to the field of grain drying technology, and specifically proposes a rapid drying equipment and method for agricultural grains. Background Technology

[0002] Grain drying is a crucial step in ensuring safe grain storage, improving quality, and facilitating subsequent processing. Its core principle is to use energy to disrupt the balance between the grain's internal moisture and the external environment. Through two key processes—heat transfer and moisture migration—excess moisture in the grain is expelled in gaseous form, ultimately reducing the grain's moisture content to safe storage standards. This aims to prevent mold growth, ensure safe storage, protect nutritional value and edibility, and guarantee smooth subsequent processing. The mixed counter-current dryer, based on its comprehensive performance of high-efficiency heat exchange, low energy consumption, and low grain loss, has become one of the most widely used dryers on the market.

[0003] The hot air generated by the hot air system enters the air duct inside the dryer and interacts with the grain flow in stages. The heat removes the moisture from the grain. To monitor the moisture content of the grain during drying, moisture levels are usually measured at the discharge port. Although microwave moisture measurement can be performed inside the tower, the porosity, flow rate, and material level of the grain are constantly changing, causing the grain density in front of the sensor to fluctuate continuously. This affects the accuracy of the moisture measurement. At the same time, because the tower is a high-temperature and high-humidity environment, the lifespan of the electronic components located inside is greatly reduced, and the failure rate increases significantly with long-term use. The hot air system cannot adjust the heat according to the measured moisture content, thus affecting the final drying effect of the grain.

[0004] Therefore, there is an urgent need for a rapid grain drying equipment and method that can accurately and stably detect the moisture content of grains inside the drying tower and work in conjunction with a hot air system to ensure the final grain drying effect. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a rapid drying device and method for agricultural grains, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention employs the following technical solution: a rapid drying device for agricultural grains, comprising a multi-layered tower body, the surface of which is equipped with a hot air system for drying the grains inside the tower body, each layer of the tower body having multiple drying chambers inside, and each drying chamber having multiple sets of angled pipes for providing air ducts inside, and a detection component for detecting the moisture content of the grains inside the drying chamber being installed at the lower end of the drying chamber; the detection component includes a mounting frame mounted at the lower end of the drying chamber, and multiple sampling outer tubes are rotatably mounted inside the mounting frame, with multiple feeding holes for feeding open on the upper surface of the sampling outer tubes. The internal rotating assembly includes a semi-annular sealing half-tube for blocking external heat from the sampling outer tube and sealing the feed port. Inside the sampling outer tube is a detection probe for measuring the moisture content of the grain. The sampling outer tube also includes a protective component to protect the detection probe. When moisture content testing of the grain is required, the grain enters the sampling outer tube through the feed port. The protective component simultaneously protects the detection probe. The rotation of the sealing half-tube seals the feed port, isolating it from external heat and protecting the detection probe. Simultaneously, the protective component opens to expose the detection probe for static testing of the grain inside the sampling outer tube.

[0007] Preferably, the sampling outer tube has a spiral groove inside, and the feed hole is located inside the spiral groove.

[0008] Preferably, both ends of the sampling tube extend movably to the outside of the mounting frame. Gear 1 is mounted on the surface of both the sampling tube and the mounting frame. The two gears mesh. Motor 1 is mounted on the surface of the mounting frame. Motor 1 drives gear 1 on the surface of the mounting frame to rotate.

[0009] Preferably, the length of the sealing half-tube is greater than the length of the sampling outer tube, and mounting brackets are installed on both sides of the mounting frame. The two ends of the sealing half-tube can move through the mounting brackets. Gears are installed on the surface of the sealing half-tube and the surface of the mounting bracket. Motors are installed on the surface of the mounting bracket, and motors drive gears on the surface of the mounting bracket to rotate.

[0010] Preferably, the protective assembly includes an arc-shaped guide plate for guiding the fed grains, an arc-shaped mounting plate for mounting a detection probe is installed inside the sampling outer tube, the mounting plate and the guide plate are fixedly connected by a connecting plate, a rotatable protective tube is installed between the mounting plate and the guide plate, and a detection port is provided on the surface of the protective tube.

[0011] Preferably, a connecting frame is installed on the surface of the guide plate, and the connecting frame is fixedly installed on the surface of the mounting frame.

[0012] Preferably, the surface of the protective tube is provided with a gear groove, the surface of the mounting bracket is equipped with a gear three, and the surface of the mounting bracket is equipped with a motor three for driving the gear three to rotate, and the teeth of the gear three mesh inside the gear groove.

[0013] A method for using a rapid grain drying device for agricultural products: S1, Non-detection state: The feed hole of the sampling outer tube faces downward, and the sealing half-tube is located at the bottom inside the sampling outer tube, so that the inside of the sampling outer tube is in a sealed state, reducing interference with the air duct inside the drying chamber; S2, Sampling state: The sampling outer tube rotates so that the feed hole faces upward, and the grain falls through the feed hole and enters the inside of the sealing outer tube; S3, Detection state: The sampling outer tube rotates so that the feed hole faces downward, and at the same time, the protective tube rotates and opens, and the grain is located inside the sampling outer tube. The detection probe detects the grain inside the sampling outer tube; S4, Discharge state: The sampling outer tube rotates so that the feed hole faces downward, and at the same time, the sealing half-tube rotates and is located above the inside of the sampling outer tube. The sampling outer tube rotates back and forth so that the grain is located inside the spiral groove and is discharged from the feed hole inside the spiral groove; S5, The sealing half-tube, sampling outer tube and protective tube rotate back to the non-detection state; S6, The hot air system is adjusted according to the detection results.

[0014] The above technical solution has the following advantages or beneficial effects: This invention provides a rapid drying device and method for agricultural grains. By setting up a sampling outer tube, a sealing half-tube, and a protective tube, when the detection component is in a non-detection state, the detection probe is located inside the sampling outer tube and the sealing half-tube, thereby preventing high temperature from affecting the service life and accuracy of the detection probe, ensuring the accuracy of the moisture value detected by the subsequent detection probe inside the grain. When the detection component is in the material taking state, the detection probe is located inside the protective tube, which can also prevent high temperature from affecting the service life and accuracy of the detection probe. When the grain enters the sampling outer tube and the sealing half-tube, the protective tube rotates and opens to perform static detection on the grain. At this time, the detection probe is located inside the sampling outer tube and the sealing half-tube, which can still protect the detection probe in the detection state, ensuring that the detection probe can always maintain the accuracy of the moisture value detection of the grain under different working conditions, and thus cooperate with the hot air system to ensure better drying effect. Attached Figure Description

[0015] The invention, its features, shape, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference numerals denote like parts throughout the drawings, which are not intentionally drawn to scale; the focus is on illustrating the spirit of the invention.

[0016] Figure 1 This is a three-dimensional structural diagram of a rapid drying equipment and method for agricultural products and grains provided by the present invention.

[0017] Figure 2 This is a schematic diagram of the three-dimensional structure of the drying chamber.

[0018] Figure 3This is a three-dimensional structural diagram of the gear at position two.

[0019] Figure 4 This is a three-dimensional structural diagram of the mounting frame location.

[0020] Figure 5 yes Figure 4 A top-down view of the three-dimensional structure.

[0021] Figure 6 This is a schematic diagram of the three-dimensional structure of the detection component.

[0022] Figure 7 This is a three-dimensional structural diagram of the probe position detection.

[0023] Figure 8 This is a bottom sectional view of the sampling tube.

[0024] Figure 9 This is a top sectional view of the sampling tube.

[0025] Figure 10 This is a schematic diagram of the structure in the non-detection state.

[0026] Figure 11 This is a structural diagram of the material handling process.

[0027] Figure 12 This is a schematic diagram of the detection state.

[0028] Figure 13 This is a structural diagram of the material discharge state.

[0029] In the diagram: 1. Tower body; 2. Hot air system; 3. Drying chamber; 4. Angle tube; 5. Detection component; 51. Mounting frame; 52. Sampling outer tube; 53. Feed hole; 54. Sealing half tube; 55. Detection probe; 6. Protective component; 61. Guide plate; 62. Mounting plate; 63. Connecting plate; 64. Detection port; 65. Protective tube; 7. Spiral groove; 8. Gear 1; 9. Motor 1; 10. Mounting bracket; 11. Gear 2; 12. Motor 2; 13. Connecting bracket; 14. Gear groove; 15. Gear 3; 16. Motor 3. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] Figure 1 A rapid drying device for agricultural grains is disclosed. The drying device includes a multi-layered tower body 1. In this embodiment, the tower body 1 has a total of four layers. The surface of each layer of the tower body 1 is equipped with a working platform built by a support frame, which facilitates the inspection of the surface of the tower body 1 by the staff. The surface of the tower body 1 is equipped with a feeding system and a discharging system (not shown in the figure). The surface of the tower body 1 is also equipped with a hot air system 2 for drying the grains inside the tower body 1. The hot air system 2 includes a hot air furnace, a ventilation duct, and a fan. The fan blows the heat generated by the hot air furnace into the interior of the tower body 1 through the ventilation duct. The heat of the hot air system 2 can be adjusted by the fan and the hot air furnace to ensure that the grains are dried while preventing over-drying.

[0033] like Figures 1-3 As shown, each layer of tower 1 is equipped with multiple drying chambers 3. The drying chambers 3 can be fixedly installed inside the drying chambers 3 by a fixing bracket (not shown in the figure). It is only necessary to ensure that the installation of the drying chambers 3 is stable. The drying chambers 3 are equipped with multiple sets of angled tubes 4. The angled tubes 4 are divided into two types: air inlet tubes and air outlet tubes. Hot air enters from the air inlet of the air inlet tube and exits from the air outlet of the air outlet tube. At the bottom of each layer of tower 1, a detection component 5 is installed to detect the moisture content of the grain inside the drying chamber 3. When the grain falls into the interior of the detection component 5, the grain can be statically detected, thereby ensuring the accuracy of the detection results. This is used in conjunction with the hot air system 2 to adjust the hot air inside the tower and ensure the final drying effect of the grain.

[0034] like Figures 4-9 As shown, the detection component 5 includes a mounting frame 51 assembled at the lower end of the drying chamber 3. The length and width of the mounting frame 51 are the same as the length and width of the drying chamber 3. In this embodiment, two sampling outer tubes 52 are rotatably mounted inside the mounting frame 51. The circular shape of the surface of the sampling outer tube 52 can guide the grain and prevent the grain from accumulating on the surface of the sampling outer tube 52. The sampling outer tube 52 also guides the airflow to minimize the impact on the hot airflow inside the tower. Multiple feed holes 53 for feeding are opened on the upper surface of the sampling outer tube 52. The feed holes 53 are evenly arranged on the surface of the sampling outer tube 52. A sealing half tube 54 is rotatably mounted inside the sampling outer tube 52. The sealing half tube 54 rotates to block the position of the feed holes 53, which can block the external heat of the sampling outer tube 52. A detection probe 55 for detecting the moisture content of the grain is assembled inside the sampling outer tube 52.

[0035] It should be noted that, as the detection probe 55 is an electronic component, it is significantly affected by heat. Both the sampling outer tube 52 and the sealing half-tube 54 are made of heat-insulating material. The detection assembly 5 has four states, as follows: Figure 10 The non-detection state shown, such as Figure 11 The material handling status shown is as follows: Figure 12 The detection status shown and as follows Figure 13 The discharge status is shown.

[0036] When the detection component 5 is in a non-detection state, the feed hole 53 on the surface of the sampling outer tube 52 is in a vertically downward state, and the same sealing half tube 54 is located below the inside of the sampling outer tube 52, so that the inside of the sampling outer tube 52 is in a sealed state. At this time, hot air enters the inside of the tower body 1, and the sampling outer tube 52 will not have a significant impact on its gas flow channel, and the grain will also slide off the surface of the sampling outer tube 52 when it falls.

[0037] When the grain inside the tower needs to be tested, the testing component 5 is in the feeding state. At this time, the sampling outer tube 52 needs to be rotated so that the feed hole 53 is in a vertically upward state. When the grain falls, it will fall from the feed hole 53 into the interior of the sealed half tube 54. Then the sampling outer tube 52 continues to rotate so that the feed hole 53 is in a vertically downward state. The interior of the sampling outer tube 52 will be in a relatively sealed state, and the test results of the static grain moisture value will be more accurate. After the test is completed, the sealed half tube 54 rotates to the top of the interior of the sampling outer tube 52, and the grain will fall into the interior of the sampling outer tube 52. At this time, the feed hole 53 is used for discharge. In order to ensure that the grain can be discharged smoothly, a spiral groove 7 is opened inside the sampling outer tube 52. The feed hole 53 is opened inside the spiral groove 7. When the grain is discharged, it will first fall into the interior of the spiral groove 7. Only after the grain falls into the interior of the spiral groove 7 can it fall smoothly out of the interior of the feed hole 53. After the discharge is completed, the testing component 5 needs to be rotated back to the non-testing state.

[0038] It should be noted that the required moisture content of each layer of grain in the tower is obtained by professionals in the field through multiple experiments. The hot air system 2 will only adjust the air volume and temperature when the moisture content of the grain in the tower is outside the set range.

[0039] Figure 7 and Figure 10As shown, in order to prevent the detection probe 55 from being affected by high temperature during the material intake and discharge process, the sampling outer tube 52 is equipped with a protective component 6 for protecting the detection probe 55. The protective component 6 includes an arc-shaped guide plate 61 for guiding the feed grain. The guide plate 61 is coaxially assembled with the sampling outer tube 52. The sampling outer tube 52 is equipped with an arc-shaped mounting plate 62 for mounting the detection probe 55. The mounting plate 62 is coaxially mounted with the guide plate 61. The mounting plate 62 and the guide plate 61 are fixedly connected by a connecting plate 63. A rotatable protective tube 65 is assembled between the mounting plate 62 and the guide plate 61. The surface of the protective tube 65 is provided with a detection port 64.

[0040] When moisture testing of grain is required, the grain enters the sampling outer tube 52 through the feed hole 53. Although the sampling outer tube 52 is connected to the interior of the tower body 1, the space formed by the protective tube 65, the mounting plate 62, and the guide plate 61 can protect the detection probe 55. During testing, the sealing half tube 54 rotates to seal the feed hole 53 and isolate external heat, thereby protecting the detection probe 55. At this time, the protective tube 65 can rotate, exposing the position where the detection probe 55 passes through the detection port 64 to perform static testing of the grain inside the sampling outer tube 52. This ensures that the detection probe 55 is isolated from external high temperature whether in the testing state or not, thereby further ensuring the accuracy of the detection probe 55.

[0041] The detection probe 55 can be a commonly used resistance probe. The probe has electrodes inside and indirectly calculates the moisture content by measuring the change in capacitance or resistance between the two electrodes of the grain sample. The tip of the resistance probe is a metal electrode. When in use, it is used with a telescopic rod to insert the probe into the grain pile to detect the moisture value. Alternatively, a near-infrared probe can be used directly. Near-infrared light of a specific wavelength is irradiated onto the grain. By detecting the spectral changes of reflected or transmitted light, the degree of light absorption by water molecules is analyzed to accurately calculate the moisture content. In this case, the telescopic rod is not required.

[0042] like Figures 3-7 As shown, to ensure the normal rotation of the sampling outer tube 52, the sealing half tube 54, and the protective tube 65, during installation, both ends of the sampling outer tube 52 extend movably to the outside of the mounting frame 51. To ensure the sealing of the inside of the mounting frame 51, the sampling outer tube 52 and the mounting frame 51 can be connected by a sealed bearing. Gears 8 are mounted on the surface of both the sampling outer tube 52 and the surface of the mounting frame 51. The two gears 8 mesh with each other. A motor 9 is mounted on the surface of the mounting frame 51 through a frame. The motor 9 drives the gears 8 on the surface of the mounting frame 51 to rotate.

[0043] It should be noted that the length of the sealing half-tube 54 is greater than the length of the sampling outer tube 52, and both ends of the sealing half-tube 54 are located outside the sampling outer tube 52. To ensure the stable installation of the sealing half-tube 54, mounting brackets 10 are installed on both sides of the mounting frame 51. Both ends of the sealing half-tube 54 can move through the mounting brackets 10. Gears 11 are installed on the surface of the sealing half-tube 54 and the surface of the mounting bracket 10. Motor 12 is installed on the surface of the mounting bracket 10. Motor 12 drives the gears 11 on the surface of the mounting bracket 10 to rotate. A connecting bracket 13 is installed on the surface of the guide plate 61. The connecting bracket 13 is fixedly installed on the surface of the mounting bracket 10.

[0044] The protective tube 65 has a gear groove 14 on its surface, which is arranged in a ring on the surface of the protective tube 65. The mounting bracket 10 is equipped with a gear 15 and a motor 16 for driving the gear 15 to rotate. The teeth of the gear 15 mesh inside the gear groove 14.

[0045] During operation, the detection component 5 is in both detection and non-detection states. In the non-detection state, the feed hole 53 faces downwards and the sealing half-tube 54 is located below the inside of the sampling outer tube 52. The detection probe 55 is located inside the sampling outer tube 52 and the sealing half-tube 54. When grain is fed, it falls on the non-feed hole 53 side of the sampling outer tube 52 to prevent grain from accumulating on the surface of the sampling outer tube 52. In the detection state, motor 9 first drives the corresponding gear 8 to rotate. Through the meshing of the two gears 8, the sampling outer tube 52 rotates, causing the feed hole 53 to face upwards. At this time, the grain falls from the feed hole 53 onto the surface of the guide plate 61 and is then guided into the inside of the sealing half-tube 54. Then, motor 9 continues to drive gear 8 to rotate, causing the feed hole 53 of the sealing half-tube 54 to face downwards, thus sealing the inside of the sampling outer tube 52 and the sealing half-tube 54. Then, motor 16 drives the corresponding gear 15 to rotate, and gear 15 drives the protective tube 6. 5. The detector 55 is exposed and the moisture content of the grain is detected. After the detection is completed, motor 3 16 continues to drive the protective tube 65 to rotate to protect the detector 55. Finally, motor 2 12 drives gear 2 11 to rotate. Through the meshing of the two gears 2 11, the sealing half tube 54 is driven to rotate to the upper part of the sampling outer tube 52. The grain will fall into the sampling outer tube 52. Then, some of the grain will fall into the spiral groove 7 and the sampling outer tube 52. The sampling outer tube 52 is driven to rotate again by motor 1 9. The grain inside the sampling outer tube 52 falls into the spiral groove 7. The grain inside the spiral groove 7 falls out from the feed hole 53. In the final state, the feed hole 53 of the sampling outer tube 52 faces downward. Motor 3 16 drives the sealing half tube 54 to rotate through gear 2 11, so that the sealing half tube 54 rotates to the lower part of the sampling outer tube 52, thereby returning the detection component 5 to the non-detection state for the next detection.

[0046] It should be noted that although the existing tower body 1 also has equipment capable of detecting grain moisture content, the accuracy of the detection results is affected by the flow of grain in a high-temperature environment. However, in this solution, when not in detection mode, the detection probe 55 is located inside the protective component 6 for heat protection. When in detection mode, the detection probe 55 is located inside the sampling outer tube 52 and the sealing half-tube 54 for heat protection, which effectively improves the service life of the detection probe 55 and the accuracy of grain moisture content detection. At the same time, although this solution adds the sampling outer tube 52, the sealing half-tube 54, and the protective tube 65 compared to the prior art, these are all conventional mechanical structures without any high-cost precision parts. Therefore, the cost of adding the above structures is low, and it can effectively improve the service life of the detection probe 55, improve the accuracy of moisture content detection, effectively reduce detection costs, and indirectly reduce waste in the grain drying process. Therefore, the cost of adding the above structures is negligible. The above technical solution of the present invention is a specific improvement based entirely on the above-mentioned existing technology and to solve the technical problems.

[0047] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0048] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0049] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and the devices and structures not described in detail should be understood as being implemented in a manner common to the art; any possible variations and modifications made by those skilled in the art without departing from the technical solution of the present invention, or equivalent embodiments with equivalent changes, do not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A rapid drying device for agricultural grains, characterized in that: The tower includes multiple layers, and the interior of the tower is equipped with a hot air system for drying the grain inside the tower. Each layer of the tower is equipped with multiple drying chambers. The surface of the drying chamber is equipped with multiple sets of angled tubes for providing air ducts. The lower end of the drying chamber is equipped with a detection component for detecting the moisture content of the grain inside the drying chamber. The detection assembly includes a mounting frame assembled at the lower end of the drying chamber. Multiple sampling tubes are rotatably mounted inside the mounting frame. Multiple feed holes for feeding are opened on the upper surface of the sampling tubes. A semi-annular sealing half tube for blocking external heat and sealing the feed holes is rotatably mounted inside the sampling tubes. A detection probe for detecting the moisture content of the grain is assembled inside the sampling tubes. The sampling outer tube is internally equipped with a protective component for protecting the detection probe; When moisture testing of grain is required, the grain enters the sampling outer tube through the feed port. The protective component protects the detection probe at the same time. The feed port is sealed by the rotation of the sealing half tube to isolate external heat and protect the detection probe. At the same time, the protective component opens to expose the detection probe for static testing of the grain inside the sampling outer tube. The sampling outer tube has a spiral groove inside, and the feed hole is opened inside the spiral groove; Both ends of the sampling tube extend movably to the outside of the mounting frame. Gear 1 is mounted on the surface of the sampling tube and the surface of the mounting frame. Two gear 1s mesh with each other. Motor 1 is mounted on the surface of the mounting frame. Motor 1 drives gear 1 on the surface of the mounting frame to rotate. The length of the sealed half-tube is greater than the length of the sampling outer tube. Mounting brackets are mounted on both sides of the mounting frame. Both ends of the sealed half-tube can move through the mounting brackets. Gears are mounted on the surface of the sealed half-tube and the surface of the mounting bracket. Motors are mounted on the surface of the mounting bracket. Motors drive gears on the surface of the mounting bracket to rotate. The protective assembly includes an arc-shaped guide plate for guiding the fed grains, an arc-shaped mounting plate for mounting a detection probe is installed inside the sampling outer tube, the mounting plate and the guide plate are fixedly connected by a connecting plate, and a rotatable protective tube is installed between the mounting plate and the guide plate, the surface of the protective tube is provided with a detection port.

2. The rapid drying equipment for agricultural grains according to claim 1, characterized in that: A connecting frame is mounted on the surface of the guide plate, and the connecting frame is fixedly mounted on the surface of the mounting frame.

3. The rapid drying equipment for agricultural grains according to claim 1, characterized in that: The protective tube has a gear groove on its surface, the mounting bracket is equipped with a gear three on its surface, and the mounting bracket is equipped with a motor three for driving the gear three to rotate. The teeth of the gear three mesh inside the gear groove.

4. A method for rapid drying of agricultural grains, performed by the rapid drying equipment for agricultural grains as described in any one of claims 1-3, characterized in that: S1, Non-detection state: The feed hole of the sampling outer tube faces downward, and the sealing half tube is located at the bottom of the sampling outer tube, so that the inside of the sampling outer tube is sealed, reducing interference with the air duct inside the drying chamber. S2, Sampling state: The outer sampling tube rotates so that the feed hole faces upward, and the grain falls through the feed hole and enters the interior of the sealed half tube; S3, Detection status: The sampling outer tube rotates so that the feed hole faces downward, and at the same time the protective tube rotates and opens. The grain is located inside the sampling outer tube, and the detection probe detects the grain inside the sampling outer tube. S4, Discharge state: The sampling outer tube rotates so that the feed hole faces downward, and at the same time the sealing half tube rotates to be located above the inside of the sampling outer tube. The sampling outer tube rotates back and forth so that the grain is located inside the spiral groove and is discharged from the feed hole inside the spiral groove. S5, the sealed half-tube, sampling outer tube and protective tube rotate back to the non-detection state; S6, the hot air system is adjusted based on the detection results.

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