Grain collecting machine unloading system for anti-blocking control

Abstract

The invention provides a grain collecting machine unloading system for anti-blocking control, and relates to the technical field of agricultural machinery, the system comprises a grain tank, an auger assembly, an auger execution mechanism, a monitoring module and a control module, the input end of the auger assembly is arranged at a discharge port at the bottom of the grain tank, and the output end of the auger assembly is configured to be arranged at an unloading port; the auger executing mechanism is in driving connection with the auger assembly and used for driving the auger assembly to convey seeds in the grain tank to the grain unloading opening, and the monitoring module is in communication connection with the auger executing mechanism and used for obtaining working current of the auger executing mechanism and sending the working current to the auger executing mechanism. The control module is in communication connection with the auger executing mechanism and the monitoring module and used for controlling the output rotating speed of the auger executing mechanism according to the working current and based on a grading anti-blocking adjusting mechanism. Smooth conveying at the joint of the auger assembly is guaranteed, and the operation efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery technology, and more specifically, to a grain unloading system for a grain sampler used for anti-blocking control. Background Technology

[0002] The grain unloading system of a grain harvester is a core component in modern agricultural equipment responsible for quickly and smoothly outputting grains from the grain bin, which directly affects operational efficiency and harvest progress.

[0003] In related technologies, the existing grain unloading system of grain receiving machines consists of multiple augers working in coordination. Due to the unstable composition of grain materials, blockages can easily occur at the joints of the augers when the material has high moisture content or many impurities, affecting the efficiency of operation. Existing improvement methods generally involve increasing the diameter of the augers or increasing the rotation speed. However, such improvement methods not only increase equipment costs but also exacerbate material breakage, increase power consumption and component wear. At the same time, they may cause blockages more easily due to the material filling too quickly. Summary of the Invention

[0004] The problem addressed by this invention is how to provide a low-cost, high-efficiency, clog-resistant grain unloading system for grain samplers.

[0005] To address the aforementioned problems, this invention provides a grain unloading system for a grain sampler with anti-clogging control, comprising a grain tank, an auger assembly, an auger actuator, a monitoring module, and a control module. The input end of the auger assembly is located at the discharge port at the bottom of the grain tank, and the output end of the auger assembly is configured at the unloading port. The auger actuator is driven and connected to the auger assembly to drive the auger assembly to transport the grain from the grain tank to the unloading port. The monitoring module is communicatively connected to the auger actuator to acquire the operating current of the auger actuator. The control module is communicatively connected to both the auger actuator and the monitoring module to control the output speed of the auger actuator based on the operating current and a graded anti-clogging adjustment mechanism.

[0006] Optionally, the anti-blocking control grain unloading system of the grain sampler further includes an auger cover and a cover actuator. The auger cover is located inside the grain tank and above the discharge port at the bottom of the grain tank. The cover actuator is driven by the auger cover and communicates with the control module. The control module is also used to control the auger actuator to adjust the opening degree of the auger cover plate according to the working current and based on the graded anti-blocking adjustment mechanism.

[0007] Optionally, the auger assembly includes at least two horizontal input augers, a vertical auger, and a horizontal output auger. One end of the at least two horizontal input augers is arranged side-by-side at the discharge port at the bottom of the grain tank. The other ends of the multiple horizontal input augers are located on the circumferential outside of the grain tank and connected to the bottom end of the vertical auger. The vertical auger is arranged perpendicular to the horizontal output auger, and the top end of the vertical auger is connected to one end of the horizontal output auger. The other end of the horizontal output auger is configured to be located at the unloading port.

[0008] Optionally, the auger actuator includes a drive motor and a frequency converter that are electrically connected. The drive motor is configured in a one-to-one correspondence with the auger of the auger assembly and the frequency converter. The drive motor is driven by the auger of the auger assembly, and the frequency converter is communicatively connected to the control module.

[0009] Optionally, the cover plate actuator includes an electric push rod and a linkage mechanism. The electric push rod is communicatively connected to the control module. The drive end of the electric push rod is connected to one end of the linkage mechanism, and the other end of the linkage mechanism is connected to the auger cover plate.

[0010] Optionally, the graded anti-blocking adjustment mechanism includes: When the operating current exceeds the safety threshold, the system enters the primary regulation mode and reduces the output speed of the corresponding drive motor. When the primary adjustment mode is in effect and the operating current exceeds the safety threshold, the system enters the intermediate adjustment mode, reducing the output speed of all drive motors. When the medium-level adjustment mode is in effect and the operating current exceeds the safety threshold, the high-level adjustment mode is entered, reducing the opening of the auger cover.

[0011] Optionally, the graded anti-blocking adjustment mechanism further includes: When the system is in the primary adjustment mode, the intermediate adjustment mode, or the advanced adjustment mode, and the operating current does not exceed the safety threshold within a preset time, the output speed is restored to the rated speed or the opening is restored to the rated value.

[0012] Optionally, the diameter of the horizontal input section auger ranges from 0.24 meters to 0.26 meters; The diameter of the vertical section auger ranges from 0.41 meters to 0.45 meters; The diameter of the horizontal output section auger ranges from 0.29 meters to 0.31 meters.

[0013] Optionally, the speed range of the drive motors corresponding to at least two of the horizontal input segment augers is 1000 rpm to 1200 rpm, or 1250 rpm to 1350 rpm; The speed range of the drive motor corresponding to the vertical section auger is 1400 rpm to 1500 rpm; The speed range of the drive motor corresponding to the horizontal output section auger is 1400 rpm to 1500 rpm.

[0014] Optionally, the monitoring module uses a current sensor to obtain the operating current of the auger actuator.

[0015] The beneficial effects of the grain unloading system for anti-clogging control of the grain sampler of the present invention are as follows: Through the coordinated operation of the auger assembly, auger actuator, monitoring module, and control module, the system first uses the monitoring module to acquire the working current of the auger actuator in real time. This allows for precise detection of load changes during the auger assembly's conveying process, providing a reliable basis for timely detection of early signs of blockage at the auger assembly connection. Secondly, the control module uses a graded anti-blockage adjustment mechanism based on the working current to control the output speed of the auger actuator. This differs from existing improvements that increase the auger diameter or blindly increase the speed, eliminating the need for additional equipment size and effectively reducing equipment costs. Furthermore, by adjusting the speed in stages, the system can dynamically adapt to the conveying requirements of the auger assembly according to load changes, avoiding problems such as increased grain breakage, increased power consumption, and accelerated wear of components like the auger assembly and actuator due to excessively high speeds. It also prevents the risk of blockage at the auger assembly connection caused by excessively rapid grain filling. Ultimately, this ensures smooth conveying at the auger assembly connection, improves operational efficiency, and specifically addresses the technical problems of easy blockage at the auger assembly connection under unstable grain composition and the numerous drawbacks of existing improvement methods. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the grain unloading system for anti-blocking control provided in an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures: 1. Grain bin; 2. Screw assembly; 21. Horizontal input screw; 22. Vertical screw; 23. Horizontal output screw; 3. Screw actuator; 31. Drive motor; 32. Frequency converter; 4. Control module; 5. Screw cover. Detailed Implementation

[0018] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Although some embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the accompanying drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0019] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first," "second," etc., mentioned in this invention are used only to distinguish different devices, modules, or units, and are not intended to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0020] It should be noted that the terms "a" and "a plurality of" used in this invention are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0021] like Figure 1 As shown in the figure, an embodiment of the present invention provides a grain unloading system for a grain sampler used for anti-blocking control, including a grain tank 1, an auger assembly 2, an auger actuator 3, a monitoring module, and a control module 4. The input end of the auger assembly 2 is located at the discharge port at the bottom of the grain tank 1, and the output end of the auger assembly 2 is configured to be located at the unloading port. The auger actuator 3 is drivenly connected to the auger assembly 2 and is used to drive the auger assembly 2 to transport the grain from the grain tank 1 to the unloading port. The monitoring module is communicatively connected to the auger actuator 3 and is used to acquire the operating current of the auger actuator 3. The control module 4 is communicatively connected to both the auger actuator 3 and the monitoring module and is used to control the output speed of the auger actuator 3 based on the operating current and a graded anti-blocking adjustment mechanism.

[0022] Specifically, grain bin 1 is used to temporarily store grain material to be unloaded, and its bottom has a discharge port as the inlet for the material to enter the conveying channel. The input end of the auger assembly 2 is connected to the discharge port, and the output end is located at the unloading port, forming a complete material conveying path from grain bin 1 to the unloading port. The auger actuator 3 is driven by the auger assembly 2 to provide rotational power, driving the auger assembly 2 to push the grain in grain bin 1 axially to the unloading port to complete the unloading operation. The monitoring module establishes a communication connection with the auger actuator 3 to obtain its operating current in real time. Since blockage during grain conveying will cause a sudden increase in the auger load, resulting in a significant increase in the operating current of the auger actuator 3, the operating current can be used as a key indicator to determine whether a blockage has occurred or is about to occur. The control module 4 communicates with both the monitoring module and the auger actuator 3, receives the operating current data from the monitoring module, and dynamically adjusts the output speed of the auger actuator 3 based on a preset graded anti-blockage adjustment mechanism. The graded anti-blockage adjustment mechanism refers to the control module 4 adopting different levels of response strategies according to different operating current conditions. For example, when the operating current is within the normal range, the current speed is maintained; when the current exceeds the first warning threshold but does not reach the severe blockage threshold, the control module 4 reduces the output speed of the auger actuator 3 to slow down the material conveying speed and alleviate local accumulation; when the current further exceeds the second threshold, which is determined to be a severe blockage risk, the auger operation may be suspended or reversed for a short time to attempt to clear the blockage. This tiered response avoids a "one-size-fits-all" shutdown, balancing unloading efficiency and anti-blockage reliability.

[0023] In this embodiment, through the coordinated operation of the auger assembly 2, the auger actuator 3, the monitoring module, and the control module 4, the monitoring module first obtains the working current of the auger actuator 3 in real time, which can accurately capture the load changes during the conveying process of the auger assembly 2, providing a reliable basis for timely detection of the signs of blockage at the connection of the auger assembly 2. Secondly, the control module 4 uses a graded anti-blockage adjustment mechanism based on the working current to control the output speed of the auger actuator 3. Unlike the existing improvement methods that increase the diameter of the auger or blindly increase the speed, this method does not require additional equipment size, effectively reducing equipment costs. At the same time, by adjusting the speed in stages, the conveying requirements of the auger assembly 2 can be dynamically adapted according to load changes, avoiding the problems of increased crushing of grain in the grain bin 1, increased power consumption, and increased wear of components such as the auger assembly 2 and the auger actuator 3 caused by excessive speed. It can also prevent the risk of blockage at the connection of the auger assembly 2 caused by excessively rapid filling of grain. Ultimately, this ensures smooth conveying at the connection of the auger assembly 2, improves operating efficiency, and specifically solves the technical problems of easy blockage at the connection of the auger assembly 2 under unstable grain composition and the many drawbacks of existing improvement methods.

[0024] Optionally, such as Figure 1As shown, the anti-blocking control grain unloading system of the grain sampler also includes an auger cover plate 5 and a cover plate actuator. The auger cover plate 5 is located inside the grain tank 1 and above the discharge port at the bottom of the grain tank 1. The cover plate actuator is driven and connected to the auger cover plate 5 and is communicatively connected to the control module 4. The control module 4 is also used to control the auger actuator 3 to adjust the opening degree of the auger cover plate 5 according to the working current and based on the graded anti-blocking adjustment mechanism.

[0025] Specifically, the auger cover 5 is installed inside the grain bin 1, precisely positioned above the bottom outlet of the grain bin 1, allowing it to directly block or open the outlet to control the amount of feed entering. The cover actuator is connected to the auger cover 5 via a drive mechanism and also interacts with the control module 4 through a communication line. After receiving the operating current signal from the monitoring module, if the control module 4 determines that further control of the feed rate is needed based on the graded anti-blocking adjustment mechanism, it will send a control command to the cover actuator to drive the auger cover 5 to adjust its opening. The beneficial effect of this structure is that when speed adjustment cannot eliminate the risk of blockage, mechanical adjustment of the feed rate reduces the conveying load from the source, further improving the anti-blocking system, making the anti-blocking measures more comprehensive, effectively avoiding stubborn blockages caused by excessive feed, and ensuring stable system operation. Optionally, such as Figure 1 As shown, the auger assembly 2 includes at least two horizontal input augers 21, a vertical auger 22, and a horizontal output auger 23. One end of each of the at least two horizontal input augers 21 is arranged side-by-side at the discharge port at the bottom of the grain tank 1. The other end of each of the horizontal input augers 21 is located on the circumferential outside of the grain tank 1 and is connected to the bottom end of the vertical auger 22. The vertical auger 22 is arranged perpendicular to the horizontal output auger 23, and the top end of the vertical auger 22 is connected to one end of the horizontal output auger 23. The other end of the horizontal output auger 23 is configured to be located at the unloading port.

[0026] Specifically, at least two horizontal input augers 21 are provided in the auger assembly 2. One end of each auger is arranged side by side at the discharge port at the bottom of the grain bin 1 to ensure that the grain bin 1 can receive the grain. The other ends of the at least two horizontal input augers 21 extend to the circumferential outside of the grain bin 1 and are connected to the bottom of the vertical auger 22 to ensure smooth transfer of the grain. The vertical auger 22 is set vertically and is arranged vertically with the horizontal output auger 23. Its top end is fixedly connected to one end of the horizontal output auger 23, and the other end of the horizontal output auger 23 faces the unloading port, forming a complete conveying path of "horizontal collection - vertical lifting - horizontal output". That is, after the at least two horizontal input augers 21 collect the grain in the grain bin 1, they are conveyed to the input end of the vertical auger 22. The vertical auger 22 conveys the grain upward to the horizontal output auger 23. The output end of the horizontal output auger 23 is connected to the unloading port, forming a complete grain conveying channel from the grain bin 1 to the unloading port. The beneficial effects of this structure are that the augers of each section are closely connected and rationally laid out, which avoids the stagnation of the pebble in the conveying path and reduces the risk of blockage at the connection. At the same time, at least two horizontal input augers 21 can improve the feeding efficiency, and the vertical layout of the vertical section and the horizontal output section conforms to the mechanical law of material conveying, further improving the overall conveying efficiency.

[0027] Optionally, such as Figure 1 As shown, the auger actuator 3 includes a drive motor 31 and a frequency converter 32 that are electrically connected. The drive motor 31 is configured in a one-to-one correspondence with the auger of the auger assembly 2 and the frequency converter 32. The drive motor 31 is driven by the auger of the auger assembly 2, and the frequency converter 32 is communicatively connected to the control module 4.

[0028] Specifically, the auger actuator 3 consists of a drive motor 31 and a frequency converter 32, which are electrically connected via a circuit. Each drive motor 31 corresponds one-to-one with each auger in the auger assembly 2, and also has a one-to-one correspondence with its corresponding frequency converter 32. That is, at least two horizontal input augers 21, the vertical auger 22, and the horizontal output auger 23 are each connected to a corresponding drive motor 31 and frequency converter 32. The output shaft of each drive motor 31 is fixedly connected to its corresponding auger, directly driving the auger to rotate. The frequency converter 32 is connected to the control module 4 via a communication line, receiving command signals from the control module 4. The advantages of this structure are that the one-to-one correspondence between the drive motor 31 and the augers allows for independent driving of each auger, and the communication connection between the frequency converter 32 and the control module 4 enables rapid response to speed adjustment commands, allowing precise control of the speed of each auger. This ensures both the flexibility of speed adjustment and improved control accuracy, facilitating rapid balancing of the conveying capacity of each auger segment.

[0029] Optionally, the cover plate actuator includes an electric push rod and a linkage mechanism. The electric push rod is communicatively connected to the control module 4. The drive end of the electric push rod is connected to one end of the linkage mechanism, and the other end of the linkage mechanism is connected to the auger cover plate 5.

[0030] Specifically, the cover plate actuator includes an electric push rod and a linkage mechanism. The electric push rod interacts with the control module 4 via a communication line, and can receive extension and retraction commands sent by the control module 4. The drive end of the electric push rod is fixedly connected to one end of the linkage mechanism, and the other end of the linkage mechanism is fixedly connected to the auger cover plate 5, forming a complete transmission link. The advantages of this structure are that the electric push rod has stable driving force and rapid action response. Combined with the linkage mechanism, it can smoothly convert linear motion into the opening and closing action of the auger cover plate 5, making the adjustment of the cover plate opening precise and controllable. Moreover, the mechanical transmission structure is reliable and durable, can adapt to the complex environment of agricultural operations, and ensures the stability of feed rate control.

[0031] Optionally, the graded anti-blocking adjustment mechanism includes: When the operating current exceeds the safety threshold, the system enters the primary regulation mode and reduces the output speed of the corresponding drive motor 31. When the primary adjustment mode is in effect and the operating current exceeds the safety threshold, the system enters the intermediate adjustment mode, reducing the output speed of all drive motors 31. When the medium-level adjustment mode is in effect and the operating current exceeds the safety threshold, the high-level adjustment mode is entered, reducing the opening degree of the auger cover 5.

[0032] Specifically, when the operating current transmitted by the monitoring module exceeds the preset safety threshold, it immediately enters the primary adjustment mode. The control module 4 sends a command to the inverter 32 corresponding to the malfunctioning auger to reduce the output speed of its drive motor 31, thereby reducing the speed of the malfunctioning auger. If the operating current continues to exceed the safety threshold after entering the primary adjustment mode, it switches to the intermediate adjustment mode. The control module 4 sends a command to the inverter 32 corresponding to all augers to synchronously reduce the output speed of all drive motors 31. If the operating current still exceeds the safety threshold in the intermediate adjustment mode, it enters the advanced adjustment mode. The control module 4 sends a command to the cover plate actuator to reduce the opening of the auger cover plate 5. The beneficial effect of this mechanism is that it adopts a gradual, graded adjustment method, avoiding the impact of blind adjustment on operating efficiency. The primary and intermediate adjustments quickly alleviate the risk of blockage through speed matching, while the advanced adjustment controls the load from the feed source. This progressive anti-blockage strategy ensures the anti-blockage effect while minimizing interference with unloading efficiency. For example, when reducing the opening degree of the auger cover 5, the control module 4 can send a telescopic command to the electric push rod of the cover actuator, so that the electric push rod can perform telescopic movement, thereby driving the auger cover 5 to reduce the opening degree through the linkage mechanism.

[0033] Optionally, the graded anti-blocking adjustment mechanism further includes: When the system is in the primary adjustment mode, the intermediate adjustment mode, or the advanced adjustment mode, and the operating current does not exceed the safety threshold within a preset time, the output speed is restored to the rated speed or the opening is restored to the rated value.

[0034] Specifically, when the system is in primary, intermediate, or advanced adjustment mode, the monitoring module continuously monitors the operating current. If the operating current remains below the safety threshold within a preset stable time, it indicates that the blockage risk has been eliminated. The control module 4 automatically sends a recovery command to the auger actuator 3 or the cover plate actuator to restore the output speed to the rated speed or restore the opening of the auger cover plate 5 to the rated value. The beneficial effect of this mechanism is that it achieves automatic reset after anti-blockage adjustment, restoring the system to its optimal operating state without manual intervention. This ensures the timeliness of anti-blockage and improves the continuity of operation, avoiding efficiency losses caused by failure to restore the system in a timely manner after adjustment.

[0035] Optionally, the diameter of the horizontal input section auger 21 ranges from 0.24 meters to 0.26 meters; The diameter of the vertical section auger 22 ranges from 0.41 meters to 0.45 meters; The diameter of the horizontal output section auger 23 ranges from 0.29 meters to 0.31 meters.

[0036] Specifically, the diameter of the horizontal input section auger 21 of the auger assembly 2 is set in the range of 0.24 meters to 0.26 meters, preferably 0.25 meters; the diameter of the vertical section auger 22 is in the range of 0.41 meters to 0.45 meters, preferably 0.43 meters; and the diameter of the horizontal output section auger 23 is in the range of 0.29 meters to 0.31 meters, preferably 0.30 meters. The beneficial effect of this size design is that the diameter of each auger section is synergistically optimized according to its conveying function and position. The diameter of the horizontal input section is adapted to the space at the bottom of the grain tank, the diameter of the vertical section is increased to improve the lifting capacity, and the diameter of the horizontal output section matches the conveying capacity of the vertical section. This avoids the conveying bottleneck caused by a single-size design, structurally improving the theoretical conveying capacity of the system and providing a basis for shortening the unloading time.

[0037] Optionally, the speed range of the drive motor 31 corresponding to at least two of the horizontal input segment augers 21 is 1000 rpm to 1200 rpm, or 1250 rpm to 1350 rpm; The speed range of the drive motor 31 corresponding to the vertical section auger 22 is 1400 rpm to 1500 rpm; The speed range of the drive motor 31 corresponding to the horizontal output section auger 23 is 1400 rpm to 1500 rpm.

[0038] Specifically, the drive motors 31 corresponding to at least two horizontal input section augers 21 are set at speeds ranging from 1000 rpm to 1200 rpm, or from 1250 rpm to 1350 rpm. When there are two horizontal input section augers 21, one is set at 1000 rpm to 1200 rpm, and the other at 1250 rpm to 1350 rpm. The drive motors 31 corresponding to the vertical section auger 22 and the horizontal output section auger 23 are both set at speeds ranging from 1400 rpm to 1500 rpm. The beneficial effect of this speed design is that the speed and the diameter of each section auger are optimized in synergy. The speed of the horizontal input section is reasonably matched to its conveying load, while the vertical and horizontal output sections use higher speeds to improve conveying efficiency. This avoids material breakage and component wear caused by simply increasing the speed, and ensures that the conveying capacity of each section auger is matched, further improving the overall grain unloading efficiency while reducing power consumption.

[0039] Optionally, the monitoring module uses a current sensor to obtain the operating current of the auger actuator 3.

[0040] Specifically, the monitoring module uses a current sensor as its core detection component. This current sensor is installed on each drive motor of the auger actuator 3, forming an electrical connection with the motor. It can collect current data during the drive motor's operation in real time and transmit the collected current signal to the control module 4 via a line. The advantages of this setup are that the current sensor has high detection accuracy and fast response speed, accurately capturing changes in the drive motor's load. Since the motor current is directly related to the auger's conveying load, the current signal can reflect in real time whether there is a risk of blockage in the auger, providing a reliable and real-time data source for the control module 4's anti-blockage decision-making, ensuring the timeliness and accuracy of anti-blockage control.

[0041] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A grain unloading system for a grain sampler used for anti-blocking control, characterized in that, The system includes a grain bin (1), an auger assembly (2), an auger actuator (3), a monitoring module, and a control module (4). The input end of the auger assembly (2) is located at the discharge port at the bottom of the grain bin (1), and the output end of the auger assembly (2) is located at the unloading port. The auger actuator (3) is driven to the auger assembly (2) and is used to drive the auger assembly (2) to transport the grain from the grain bin (1) to the unloading port. The monitoring module is communicatively connected to the auger actuator (3) and is used to obtain the working current of the auger actuator (3). The control module (4) is communicatively connected to the auger actuator (3) and the monitoring module respectively and is used to control the output speed of the auger actuator (3) based on the working current and a graded anti-blocking adjustment mechanism.

2. The grain unloading system for anti-blocking control of a grain sampler according to claim 1, characterized in that, It also includes an auger cover plate (5) and a cover plate actuator. The auger cover plate (5) is located inside the grain tank (1) and above the discharge port at the bottom of the grain tank (1). The cover plate actuator is driven and connected to the auger cover plate (5) and communicates with the control module (4). The control module (4) is also used to control the auger actuator (3) to adjust the opening degree of the auger cover plate (5) according to the working current and based on the graded anti-blocking adjustment mechanism.

3. The grain unloading system for anti-blocking control of a grain sampler according to claim 2, characterized in that, The auger assembly (2) includes at least two horizontal input augers (21), a vertical auger (22), and a horizontal output auger (23). One end of the at least two horizontal input augers (21) is arranged side by side at the discharge port at the bottom of the grain tank (1). The other end of the multiple horizontal input augers (21) is located on the circumferential outside of the grain tank (1) and connected to the bottom end of the vertical auger (22). The vertical auger (22) is arranged perpendicular to the horizontal output auger (23), and the top end of the vertical auger (22) is connected to one end of the horizontal output auger (23). The other end of the horizontal output auger (23) is configured to be located at the unloading port.

4. The grain unloading system for anti-blocking control of a grain sampler according to claim 3, characterized in that, The auger actuator (3) includes a drive motor (31) and a frequency converter (32) electrically connected. The drive motor (31) is configured in a one-to-one correspondence with the auger of the auger assembly (2) and the frequency converter (32). The drive motor (31) is driven by the auger of the auger assembly (2), and the frequency converter (32) is communicatively connected to the control module (4).

5. The grain unloading system for anti-blocking control of a grain sampler according to claim 2, characterized in that, The cover plate actuator includes an electric push rod and a linkage mechanism. The electric push rod is communicatively connected to the control module (4). The drive end of the electric push rod is connected to one end of the linkage mechanism, and the other end of the linkage mechanism is connected to the auger cover plate (5).

6. The grain unloading system for anti-blocking control of a grain sampler according to claim 4, characterized in that, The graded anti-blocking adjustment mechanism includes: When the operating current exceeds the safety threshold, the system enters the primary regulation mode and reduces the output speed of the corresponding drive motor (31). When in the primary adjustment mode and the operating current exceeds the safety threshold, the system enters the intermediate adjustment mode, reducing the output speed of all drive motors (31). When in the intermediate adjustment mode and the operating current exceeds the safety threshold, enter the advanced adjustment mode and reduce the opening of the auger cover (5).

7. The grain unloading system for anti-blocking control of a grain sampler according to claim 6, characterized in that, The tiered anti-blocking adjustment mechanism also includes: When the system is in the primary adjustment mode, the intermediate adjustment mode, or the advanced adjustment mode, and the operating current does not exceed the safety threshold within a preset time, the output speed is restored to the rated speed or the opening is restored to the rated value.

8. The grain unloading system for anti-blocking control of a grain sampler according to claim 3, characterized in that, The diameter of the horizontal input section auger (21) ranges from 0.24 meters to 0.26 meters; The diameter of the vertical section auger (22) ranges from 0.41 meters to 0.45 meters; The diameter of the horizontal output section auger (23) ranges from 0.29 meters to 0.31 meters.

9. The grain unloading system for anti-blocking control of a grain sampler according to claim 4, characterized in that, The speed range of the drive motor (31) corresponding to at least two of the horizontal input segment augers (21) is 1000 rpm to 1200 rpm, or 1250 rpm to 1350 rpm; The speed range of the drive motor (31) corresponding to the vertical section auger (22) is 1400 rpm to 1500 rpm; The speed range of the drive motor (31) corresponding to the horizontal output section auger (23) is 1400 rpm to 1500 rpm.

10. The grain unloading system for anti-blocking control of a grain sampler according to claim 1, characterized in that, The monitoring module uses a current sensor to obtain the operating current of the auger actuator (3).

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