Automatic detection device for multi-variety grain purchase

Abstract

The invention relates to an automatic detection device for multi-variety grain purchase, and belongs to the technical field of grain detection equipment. Comprising a cabinet body and a feeding assembly, and a moisture detection unit, a rice hulling and milling unit, a visual detection unit and a national standard volume weight unit are integrated in the cabinet body; the feeding assembly comprises a feeding pipe and a feeding kettle connected with the feeding pipe, and a material control assembly is arranged on the cabinet body; the material control assembly comprises a stirring structure and a material control structure, and the grains are stirred through a stirring blade assembly; the material control structure comprises a material control frame, a first material control plate and a second material control plate, and grain discharging is controlled through rotation of the first material control plate. According to the automatic detection device for multi-variety grain purchase, the multiple detection units are integrated in the cabinet body, automation and high efficiency of the detection process are achieved, sample uniformity and accurate control over the discharging speed are ensured, grain caking and blocking are effectively prevented, various grain detection requirements are flexibly met, and the detection efficiency is improved. And the equipment state is monitored in real time, and the data security is guaranteed.

Description

Technical Field

[0001] This invention relates to an automatic detection device for the purchase of multiple varieties of grain, belonging to the technical field of grain detection equipment. Background Technology

[0002] In the domestic grain procurement and storage process, grain is mainly transported to the procurement site in bulk or bagged form. To ensure that the quality of the grain entering the storage site meets national standards, and thus accurately determine the grain grade and purchase price, a series of core processes, including sampling, sample division, and testing of multiple quality indicators, must be completed. The main grain categories procured in my country include rice, wheat, corn, and soybeans. The quality inspection indicators for different grain categories vary significantly: rice requires testing for moisture content, impurity percentage, and brown rice content; wheat requires testing for test weight, percentage of imperfect grains, impurity content, and moisture content; corn requires testing for test weight, imperfect grains, moldy grains, impurities, and moisture content; and soybeans require testing for whole grain rate, damaged grain rate, impurity content, and moisture content. These testing processes are cumbersome and labor-intensive. As the core equipment of the grain quality testing system, the performance of the sampling device directly determines the testing efficiency and accuracy of the results, and is crucial to the standardization, fairness, and efficiency of grain procurement.

[0003] With the increasing scale and intensification of grain procurement, existing grain sampling devices have gradually revealed many undeniable shortcomings in practical applications, failing to meet the current demands for efficient and accurate testing in the grain procurement process. Specific deficiencies are as follows:

[0004] The equipment has low integration and the various testing units are set up separately, which not only takes up a lot of space and is not suitable for the limited space in the grain purchasing site, but also requires manual transfer of samples, which can easily cause sample contamination and data errors, making it difficult to meet the large-scale testing needs during the peak purchasing period.

[0005] Sample uniformity is difficult to guarantee. When grains are directly fed into the testing unit, they are prone to jamming due to particle differences. Furthermore, damp grains are prone to clumping and sticking to the inner wall of the equipment, which not only affects the smoothness of feeding but also leads to the distortion of subsequent test results. Residual problems are prominent when switching between different grains for testing.

[0006] The feeding speed cannot be precisely controlled, making it difficult to achieve uniform and stable grain feeding. In practical applications, two extreme situations often occur: First, the feeding speed is too fast, causing subsequent detection units to be unable to process the large influx of samples in time, resulting in sample accumulation and affecting the coordination rhythm between detection units; second, the feeding channel is blocked due to grain clumping, excessively large particles, or design flaws in the material control structure, preventing the grain from falling smoothly and requiring manual intervention to clear it, which seriously slows down the detection progress. In addition, uneven feeding speed will cause large fluctuations in the amount of sample acquired by the detection units, making it impossible to guarantee the consistency of detection conditions, thereby affecting the repeatability and comparability of detection data and reducing the reliability of the entire detection system. Summary of the Invention

[0007] This invention provides an automatic detection device for the purchase of multiple grain varieties, in order to solve the problems of low equipment integration, difficulty in ensuring sample uniformity, and inability to accurately control the feeding speed in the prior art.

[0008] This invention provides an automatic detection device for the purchase of multiple varieties of grains, which includes a cabinet and a feeding assembly. The cabinet integrates a moisture detection unit, a rice hulling and milling unit, a visual detection unit, and a national standard bulk density unit.

[0009] The feeding assembly includes multiple feeding pipes and a feeding vessel connected to the feeding pipes. The cabinet is equipped with a material control assembly connected to the feeding vessel.

[0010] The material control component includes a stirring structure and a material control structure. The stirring structure is equipped with a stirring blade assembly, which stirs the grain.

[0011] The material control structure includes a material control frame, a first material control plate, and a second material control plate. The material control frame is interconnected with the stirring structure. The first and second material control plates are located inside the material control frame and rotate in a circular motion. The first and second material control plates are spaced apart. The material control frame is in contact with the inner wall of the stirring frame. The feeding of grain is controlled by the rotation of the first material control plate.

[0012] Preferably, the cabinet is equipped with a cabinet door and a sensor that matches the cabinet door. The sensor detects the opening and closing status and frequency of the cabinet door. The sensor transmits data to the server through a wireless transmission module.

[0013] Preferably, the stirring structure includes a stirring frame and a stirring blade assembly. The feeding vessel and the stirring frame are connected by a first guide pipe. The stirring blade assembly is located inside the stirring frame to stir the grain.

[0014] Preferably, the material control frame is provided with a rotating shaft that drives the first material control plate and the second material control plate to rotate. The first material control plate and the second material control plate are multiple plates arranged in a circle around the rotating shaft, and the length of the first material control plate is greater than the length of the second material control plate.

[0015] Preferably, the material control frame and the moisture detection unit are connected by a second material guide pipe.

[0016] Preferably, the moisture detection unit, rice hulling unit, visual inspection unit, and national standard bulk density unit are connected by a conveying pipeline, and the conveying pipeline has a horizontal section, which is the feed inlet.

[0017] Preferably, a hydraulic cylinder is provided at one end of the horizontal section, the hydraulic cylinder is coaxially arranged with the horizontal section, and the feed port of the horizontal section is located in the middle section of the horizontal section.

[0018] Preferably, the bottom of the feed vessel is provided with an elastic sleeve that fits against the inner wall, the elastic sleeve is provided with a plurality of guide grooves, the plurality of guide grooves are located on the elastic sleeve in a spiral arrangement, and the bottom of the feed vessel is provided with a guide block that matches the elastic sleeve.

[0019] Preferably, the guide groove is provided with a plurality of linearly arranged protrusions, the guide block is conical, and there is a gap between the guide block and the inner wall of the feed vessel.

[0020] Preferably, the stirring blade assembly includes a stirring blade support frame, a first stirring blade, and a second stirring blade. The first stirring blade is located at the bottom of the stirring blade support frame, and the second stirring blade is located at the top of the stirring blade support frame and is hinged to the stirring blade support frame. A limiting frame matching the second stirring blade is provided on one side of the stirring blade support frame, and a baffle fixedly connected to the side of the stirring blade support frame away from the limiting frame is provided.

[0021] The beneficial effects of this invention are:

[0022] This invention provides an automatic detection device for multi-variety grain procurement. It highly integrates a moisture detection unit, a rice hulling unit, a visual inspection unit, a national standard bulk density unit, and a material control component within a cabinet, significantly saving space. This makes it particularly suitable for grain procurement sites with limited space, improving site utilization. The device achieves fully automated connection between the various detection units through a conveying pipeline, reducing manual handling steps, avoiding sample contamination and data errors, and significantly improving detection efficiency. It is especially suitable for the large-scale testing needs during peak grain procurement periods. A stirring structure agitates the grain before it enters the detection unit, effectively preventing jamming caused by differences in grain particle size, improving sample uniformity, and ensuring the accuracy of subsequent test results. This provides a reliable basis for accurate grain grade determination and reasonable procurement price assessment. The first and second material control plates in the material control structure precisely control the grain feeding speed through circular rotation, achieving uniform and stable grain feeding. This design avoids sample volume fluctuations caused by uneven feeding speed, ensuring consistent testing conditions and improving the repeatability and comparability of test data. Multiple feed pipes are designed to facilitate switching between different types of grains for sampling and testing. Hydraulic cylinders are installed in the horizontal section of the conveying pipeline; their extension and retraction prevents grain blockage during transport, preventing grain clumping at the source and ensuring smooth grain feeding, further improving testing efficiency. Sensors matching the cabinet door are installed on the cabinet body to monitor the door's opening and closing status and frequency in real time, transmitting data to the server via a wireless transmission module. This prevents unauthorized personnel from opening the cabinet door and tampering with the program, ensuring equipment security and the reliability of test data. For grains with high moisture content, an elastic sleeve and guide groove are installed inside the feeding vessel. The impact deformation of the grain against the elastic sleeve and the friction of the protrusions in the guide groove effectively break up clumped grains, preventing the adhesion of damp grains inside the feeding vessel. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of an automatic detection device for the acquisition of multiple grain varieties according to the present invention.

[0024] Figure 2 This is a cross-sectional structural schematic diagram of an automatic detection device for the acquisition of multiple grain varieties according to the present invention.

[0025] Figure 3 This is another cross-sectional view of the automatic detection device for purchasing multiple types of grain according to the present invention.

[0026] Figure 4 This is a front sectional view of an automatic detection device for the acquisition of multiple grain varieties according to the present invention.

[0027] Figure 5This is a schematic diagram of the hydraulic cylinder structure of an automatic detection device for purchasing multiple types of grain according to the present invention.

[0028] Figure 6 This is a schematic diagram of the material control component structure of an automatic detection device for multi-variety grain purchasing according to the present invention.

[0029] Figure 7 This is a schematic diagram of the feeding vessel structure of an automatic detection device for multi-variety grain purchasing according to the present invention.

[0030] Figure 8 This is a schematic diagram of the stirring structure of an automatic detection device for purchasing multiple types of grains according to the present invention.

[0031] Figure 9 This is a partial structural diagram of the stirring structure of an automatic detection device for multi-variety grain purchasing according to the present invention.

[0032] In the diagram: 1. Cabinet body, 11. Cabinet door, 12. Conveying pipeline, 121. Horizontal section, 13. Second guide pipe, 14. Hydraulic cylinder, 2. Feeding assembly, 21. Feeding pipe, 22. Feeding vessel, 221. Elastic sleeve, 222. Guide groove, 223. Protrusion, 224. Guide block, 23. First guide pipe, 3. Material control assembly, 31. Stirring structure, 311. Stirring frame, 312. Stirring blade assembly, 3121. Stirring blade support frame, 3122. First stirring blade, 3123. Second stirring blade, 3124. Baffle, 313. Stirring shaft, 314. Limiting frame, 32. Material control structure, 321. Material control frame, 322. First material control plate, 323. Second material control plate, 324. Rotating shaft. Detailed Implementation

[0033] 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.

[0034] Example 1

[0035] This invention proposes an automatic detection device for multi-variety grain purchasing, comprising a cabinet 1. The cabinet 1 integrates a moisture detection unit, a rice hulling and milling unit, a visual inspection unit, and a national standard bulk density unit. These units are interconnected via multiple transmission pipes 12. The cabinet 1 has matching doors 11, and sensors matching the doors are also mounted on the cabinet 1. These sensors detect the opening and closing status and frequency of the doors 11. The sensors transmit data to a server via a wireless transmission module.

[0036] The feeding assembly 2 includes a feeding pipe 21 and a feeding vessel 22. There are multiple feeding pipes 21, and all of the multiple feeding pipes 21 are connected to the feeding vessel 22. The feeding vessel 22 is located at the top of the cabinet 1. The cabinet 1 is equipped with a material control assembly 3 that matches the feeding assembly 2. The material control assembly 3 includes a stirring structure 31 and a material control structure 32. The feeding vessel 22 is connected to the stirring structure 31 through a first guide pipe 23. The stirring structure 31 includes a stirring frame 311, a stirring blade assembly 312, and a stirring shaft 313. The stirring blade assembly 312 and the stirring shaft 313 are both located inside the stirring frame 311. There are multiple stirring blade assemblies 312, and the multiple stirring blade assemblies 312 are distributed in a circle around the stirring shaft 313. The stirring shaft 313 is driven by a motor. The feeding vessel 22 is connected to the top of the stirring structure 31 through the first guide pipe 23.

[0037] The material control structure 32 includes a material control frame 321 and a rotating shaft 324. The rotating shaft 324 is located inside the material control frame 321 and is driven by a motor. Multiple first material control plates 322 and second material control plates 323 are provided on the rotating shaft 324. The multiple first material control plates 322 and second material control plates 323 are arranged in a circle on the rotating shaft 324. The first material control plates 322 and second material control plates 323 are distributed at intervals on the rotating shaft 324. The first material control plates 322 are in contact with the inner wall of the material control frame 321. The length of the second material control plates 323 is less than the length of the first material control plates 322. There is a gap between the second material control plates 323 and the inner wall of the material control frame 321. The bottom of the material control structure 32 is connected to the moisture detection unit through a second material guide pipe 13.

[0038] The top of the conveying pipeline 12 is provided with a horizontal section 121, and a hydraulic cylinder 14 is provided on the horizontal section 121. The hydraulic cylinder 14 and the horizontal section 121 are coaxially arranged, and the feed inlet of the conveying pipeline 12 is located in the middle section of the horizontal section 121.

[0039] During use, grain enters the feeding vessel 22 through multiple feeding pipes 21, allowing for the switching of different grains to be sampled. After entering the feeding vessel 22, the grain enters the stirring structure 31 through the first guide pipe 23. The motor drives the stirring shaft 313 to rotate, and multiple stirring blade assemblies 312 stir the grain within the stirring structure 31, thereby improving sampling accuracy, ensuring sample uniformity, and reducing material jamming due to particle differences. The mixed grain then enters the control frame 321, where the motor drives the rotating shaft 324 to rotate. The rotating shaft 324 drives the first control plate 322 and the second control plate 323 to rotate synchronously, controlling the grain feeding speed. This allows the grain to be fed at a uniform speed. The first control plate 322 contacts the inner wall of the mixing structure 31, and the first control plate 322 can seal the grain, thereby controlling the flow of the grain. According to the type of grain, it flows to each detection unit through the second guide pipe 13. For example, when the sampled grain is rice, the moisture detection unit simultaneously detects moisture, bulk density, and temperature. The rice hulling unit and the visual inspection unit work together to complete the inspection of hulling rate, head rice rate, impurity content, moisture content, yellow rice content, outer brown rice content, and mixing rate. When the grain being tested is wheat, it passes through the moisture detection unit, visual inspection unit, and national standard bulk density unit in sequence to complete the inspection of wheat bulk density, imperfect grains, impurity content, and moisture content. The inspection process involves several steps. When testing corn, the moisture content, national standard bulk density, and visual inspection units are sequentially used to determine the corn's bulk density, imperfect kernel content, moldy kernel content, impurity content, and moisture content. When testing soybeans, the moisture content and visual inspection units are used to determine the soybean's whole kernel rate, damaged kernel rate, impurity content, and moisture content. Multiple testing units are connected via a transmission pipeline 12. The transmission pipeline 12 includes a horizontal section 121 and a hydraulic cylinder 14 matching the horizontal section 121. The horizontal section 121 is the grain feeding end, with its inlet located in the middle. As the grain enters the horizontal section 121, the hydraulic cylinder 14 activates the hydraulic cylinder. The internal expansion and contraction mechanism of unit 121 prevents grain from clogging within the conveying pipe 12, thus preventing clumping at the source. The moisture detection unit, rice hulling unit, visual inspection unit, national standard bulk density unit, and material control component 3 are integrated inside the cabinet 1. The entire process is automated through the conveying pipe 12, saving space and facilitating collaborative operation between units. This avoids sample contamination and data errors caused by manual handling, making it particularly suitable for large-scale testing during peak grain purchasing seasons. The cabinet 1 is equipped with a cabinet door 11 and a sensor that matches the door 11. The sensor can detect the opening and closing status and frequency of the door 11. The sensor transmits data to the server via a wireless transmission module to monitor the equipment status and prevent program tampering.

[0040] Compared to existing designs, integrating the moisture detection unit, rice hulling unit, visual inspection unit, national standard bulk density unit, and material control component 3 into the cabinet 1 significantly saves space, making it particularly suitable for grain purchasing sites with limited space. The integrated units within the cabinet 1 are connected to achieve fully automated operation via the conveying pipeline 12, allowing for close cooperation and collaborative work, thus improving detection efficiency and accuracy. The design of multiple feed pipes 21 facilitates easy switching between different types of grain requiring sampling, enhancing the equipment's versatility and flexibility, adapting to various grain purchasing scenarios. By stirring the grain within the stirring structure 31, direct grain entry into the detection unit is prevented, avoiding material jamming due to particle differences and ensuring sample uniformity. In the material control structure 32, a motor drives… The rotating shaft 324 rotates, and the first control plate 322 contacts the inner wall of the control frame 321, which can block the grain and control the flow of grain. The second control plate 323 is shorter than the first control plate 322 and has a gap with the inner wall of the control frame 321. The first control plate 322 and the second control plate 323 rotate synchronously to control the feeding speed of the grain, so that the grain can be fed at a uniform speed. During the process of the grain entering the horizontal section 121, the hydraulic cylinder 14 is activated to extend and retract within the horizontal section 121, thereby preventing the grain from being blocked in the conveying pipeline 12 and preventing agglomeration from the source. By monitoring the status of the cabinet door 11 through the sensor, the usage of the equipment can be monitored in real time, preventing unauthorized personnel from opening the cabinet door 11 to tamper with the program, ensuring the safety of the equipment and the reliability of the detection data.

[0041] Example 2

[0042] Based on the previous embodiment, in this embodiment, the feed vessel 22 is provided with an elastic sleeve 221, which fits against the inner wall of the bottom of the feed vessel 22. The bottom of the feed vessel 22 is conical and gradually narrows from top to bottom. The elastic sleeve 221 is provided with multiple guide grooves 222, which are arranged in a spiral circumference on the elastic sleeve 221. The guide grooves 222 and the outer surface of the elastic sleeve 221 are smoothly transitioned. The guide grooves 222 are provided with multiple linearly arranged protrusions 223.

[0043] The bottom of the feed vessel 22 is provided with a guide block 224 that matches the first guide pipe 23. The guide block 224 is conical with the tip facing upward, and there is a gap between the guide block 224 and the inner wall of the bottom of the feed vessel 22.

[0044] The stirring blade assembly 312 includes a stirring blade support frame 3121, a first stirring blade 3122, and a second stirring blade 3123. The first stirring blade 3122 and the second stirring blade 3123 are located at the upper and lower ends of the stirring blade support frame 3121, respectively. There are multiple first stirring blades 3122, which are linearly inclined along the stirring blade support frame 3121. There are gaps between the multiple first stirring blades 3122. The stirring shaft 313 is provided with a limiting frame 314 that matches the second stirring blade 3123. The bottom of the limiting frame 314 is fixedly connected to the stirring shaft 313. One bottom end of the second stirring blade 3123 is hinged to the stirring blade support frame 3121. The end of the stirring blade support frame 3121 away from the limiting frame 314 is provided with a baffle 3124 that matches the second stirring blade 3123.

[0045] When the moisture content of the grain to be tested is high, the grain enters the inner wall of the feeding vessel 22 through the feeding pipe 21. The grain impacts the elastic sleeve 221 at the bottom of the feeding vessel 22, causing the elastic sleeve 221 to deform. The grain can then move downwards along the guide groove 222. The guide groove 222 has multiple protrusions 223 that can generate friction with the grain, further breaking up any clumps of grain. This prevents the moist grain from sticking to the inner wall of the feeding vessel 22 during the feeding process, thus affecting the accuracy of the grain switching detection. The guide block 224 at the bottom of the feeding vessel 22 is conical, further breaking up the grain. The grain flows through the gap between the guide block 224 and the feeding vessel 22 and into the stirring structure 31 through the first guide pipe 23.

[0046] When grain enters the mixing structure 31, the motor drives the mixing blade assembly 312 to rotate in the forward direction. The first mixing blade 3122 and the second mixing blade 3123 mix the grain. The bottom of the second mixing blade 3123 rotates between itself and the mixing blade support frame 3121. Under the impact of the grain, it tilts and rotates. The top of the second mixing blade 3123 contacts the limiting frame 314 and is limited by the limiting frame 314. When it is necessary to switch the grain to be detected, the mixing shaft 313 is driven by the motor to rotate in the reverse direction. The second mixing blade 3123 rotates towards the end away from the limiting frame 314. The second mixing blade 3123 is limited and fixed by the baffle 3124 on the mixing blade support frame 3121. The area of ​​the second mixing blade 3123 is in a vertical state. The top of the second mixing blade 3123 contacts the inner wall of the mixing structure 31, which can clean the grain adhering to the inner wall of the mixing structure 31.

[0047] Compared with the existing design, by providing an elastic sleeve 221 inside the feeding vessel 22, and the elastic sleeve 221 fitting against the inner wall of the bottom of the feeding vessel 22, when grain with high moisture content enters the feeding vessel 22, it will impact the elastic sleeve 221, causing the elastic sleeve 221 to deform. The elastic sleeve 221 is provided with multiple guide grooves 222 arranged in a spiral circumference. The guide grooves 222 and the outer surface of the elastic sleeve 221 are smoothly transitioned, and multiple linearly arranged protrusions 223 are provided in the guide grooves 222. As the grain moves downward along the guide groove 222, the protrusions 223 generate friction with the grain, breaking up any clumps and ensuring smooth feeding and accurate detection. At the bottom of the feeding vessel 22, near the first guide pipe 23, is a guide block 224 that matches the first guide pipe 23. The guide block 224 is conical with its tip pointing upwards, and has a gap between it and the inner wall of the bottom of the feeding vessel 22. The conical shape of the guide block 224 further breaks up the grain and guides it through the gap between the guide block 224 and the feeding vessel 22, allowing it to flow smoothly into the first guide pipe 23, ensuring continuous and stable grain feeding. When the motor drives the stirring blade assembly 312 to rotate forward, the second stirring blade... The bottom of the stirring blade 3123 rotates between itself and the stirring blade support frame 3121. Under the impact of the grain, it tilts and rotates, and its top contacts the limiting frame 314 for limiting. It normally stirs the grain. When it is necessary to switch the grain to be detected, the stirring shaft 313 is driven by the motor to rotate in the opposite direction. The second stirring blade 3123 rotates towards the end away from the limiting frame 314 and is limited and fixed in a vertical state by the baffle 3124. Its top contacts the inner wall of the stirring structure 31, which can clean the grain adhering to the inner wall of the stirring structure 31. It has flexible rotation and limiting functions, can adapt to different stirring needs, and can effectively clean the inner wall when switching grains, ensuring the normal operation of the equipment and the accuracy of detection.

[0048] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A multi-crop grain purchase automatic detection device, characterized in that, Including cabinet (1), feed assembly (2), the cabinet (1) is integrated with moisture detection unit, rice milling unit, visual detection unit, national standard bulk density unit in; The feed assembly (2) includes a plurality of feed pipes (21), a feed kettle (22) connected with the feed pipe (21), and a control material assembly (3) connected with the feed kettle (22) on the cabinet (1). The control material assembly (3) includes a stirring structure (31) and a control material structure (32), the stirring structure (31) is provided with a stirring blade assembly (312) inside, and the grain is stirred by the stirring blade assembly (312). The control material structure (32) includes a control material frame (321), a first control material plate (322) and a second control material plate (323), the control material frame (321) is penetrated between the stirring structure (31), the first control material plate (322) and the second control material plate (323) are located inside the control material frame (321) and rotate in a circle, the first control material plate (322) and the second control material plate (323) are arranged at intervals, and the control material frame (321) is in contact with the inner wall of the stirring frame (311). The first control material plate (322) rotates to control the grain discharge.

2. The automatic detection device for multi-species grain purchase according to claim 1, characterized in that: The cabinet (1) is provided with a cabinet door (11) and a sensor matched with the cabinet door (11), the sensor detects the opening and closing state and the opening and closing frequency of the cabinet door (11), and the sensor transmits data to the server through a wireless transmission module.

3. The automatic detection device for multi-species grain purchase according to claim 1, characterized in that: The stirring structure (31) includes a stirring frame (311) and a stirring blade assembly (312), the feed kettle (22) and the stirring frame (311) are penetrated through by being provided with a first guide pipe (23), and the stirring blade assembly (312) is located inside the stirring frame (311) and stirs the grain.

4. The automatic detection device for multi-species grain purchase according to claim 1, characterized in that: The control material frame (321) is provided with a rotating shaft (324) for driving the first control material plate (322) and the second control material plate (323) to rotate, the first control material plate (322) and the second control material plate (323) are arranged in a circle around the rotating shaft (324), and the length of the first control material plate (322) is greater than that of the second control material plate (323).

5. The automatic detection device for multi-species grain purchase according to claim 1, characterized in that: The control material frame (321) and the moisture detection unit are connected by being provided with a second guide pipe (13).

6. The automatic detection device for multi-species grain purchase according to claim 1, characterized in that: The moisture detection unit, the rice milling unit, the visual detection unit and the national standard bulk density unit are connected by being provided with a conveying pipeline (12), the conveying pipeline (12) is provided with a horizontal section (121), and the horizontal section (121) is a feed inlet.

7. The automatic detection device for multi-species grain purchase according to claim 6, characterized in that: One end of the horizontal section (121) is provided with a hydraulic cylinder (14), the hydraulic cylinder (14) and the horizontal section (121) are coaxially arranged, and the feed inlet on the horizontal section (121) is located in the middle section of the horizontal section (121).

8. The automatic detection device for multi-species grain purchase according to claim 1, characterized in that: The bottom of the feed kettle (22) is provided with an elastic sleeve (221) matched with the inner wall, a plurality of guide grooves (222) are arranged in the elastic sleeve (221), the plurality of guide grooves (222) are arranged in a spiral on the elastic sleeve (221), and the feed kettle (22) is provided with a guide block (224) matched with the elastic sleeve (221).

9. The automatic detection device for multi-species grain purchase according to claim 8, characterized in that: The guide groove (222) is internally provided with a plurality of linearly arranged convex points (223), the material guide block (224) is conical, and a gap exists between the material guide block (224) and the inner wall of the feeding kettle (22).

10. The automatic detection device for multi-species grain purchase according to claim 1, characterized in that: The stirring blade assembly (312) comprises a stirring blade support frame (3121), a first stirring blade (3122) and a second stirring blade (3123). The first stirring blade (3122) is located at the bottom of the stirring blade support frame (3121), the second stirring blade (3123) is located at the top of the stirring blade support frame (3121) and is hinged with the stirring blade support frame (3121), one side of the stirring blade support frame (3121) is provided with a limiting frame (314) matched with the second stirring blade (3123), and the side, away from the limiting frame (314), of the stirring blade support frame (3121) is provided with a fixedly connected baffle (3124).

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