Rapid grain sample mixing device

CN224640903UActive Publication Date: 2026-08-18ERYAN(SHANGHAI) TECH CO LTD
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Patent Information

Application Number
CN202521924177.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-09-08
Publication Date
2026-08-18
Estimated Expiration
2035-09-08

AI Technical Summary

Technical Problem

[0003]传统的粮食混匀方法多依赖人工搅拌或简单机械晃动,存在混匀效率低、均匀度差、劳动强度大等问题

Benefits of technology

采用本实用新型,通过第一电机驱动转盘绕自身轴线转动,第二电机驱动工作平台绕水平转轴转动,从而使密封桶内的粮食样品上下翻转的同时绕密封桶的轴线转动,大大提高了粮食样品混匀效率与均匀度,每次混匀效果一致性好;通过采用密封桶,避免了混匀过程中粮食样品泄漏,避免了样品损失,清洗方便;此外,人工只需进行取放粮食样品和拆装密封桶的操作,劳动强度小,操作便捷。

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a kind of grain sample rapid mixing device, including cabin, first motor and second motor, the working platform is connected with the horizontal arrangement's pivot in cabin, the second motor is transmissionally connected with working platform and is used to drive working platform rotation around the horizontal arrangement's pivot;The middle part of the working platform is rotatably connected with carousel, and sealing barrel is fixed on carousel, the first motor is transmissionally connected with carousel and is used to drive carousel rotation around its own axis.Using the utility model, first motor drives carousel rotation around its own axis, second motor drives working platform rotation around horizontal pivot, so that grain sample in sealing barrel is turned upside down while rotating around the axis of sealing barrel, greatly improve grain sample mixing efficiency and uniformity, each mixing effect consistency is good;Labor intensity is small, and operation is convenient.
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Description

Technical Field

[0001] This utility model relates to the technical field of grain testing equipment, specifically to a rapid mixing device for grain samples. Background Technology

[0002] In the grain processing and testing industry, uniform mixing of grain samples is a fundamental step in many testing and analysis tasks. For example, when testing for indicators such as impurity content, nutrient distribution, and pesticide residues in grains, it is necessary to ensure that all parts of the sample are thoroughly mixed to obtain accurate and representative test results.

[0003] Traditional grain mixing methods often rely on manual stirring or simple mechanical shaking, which suffers from low mixing efficiency, poor uniformity, and high labor intensity. Furthermore, manual stirring is easily affected by the operator's skill and physical strength, making it difficult to guarantee consistent mixing results each time; simple mechanical shaking may, due to equipment limitations, fail to effectively turn and mix the grains, resulting in insufficient mixing.

[0004] Furthermore, while some mixing devices on the market can achieve a certain degree of automated mixing, they suffer from problems such as complex structure, high cost, and large footprint, making them unsuitable for small grain testing laboratories or rapid on-site testing scenarios. Therefore, developing a high-efficiency, uniform, convenient, and low-cost rapid grain mixer is of significant practical importance. Utility Model Content

[0005] To solve at least one of the above technical problems, this utility model provides a rapid mixing device for grain samples.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: This utility model provides a rapid mixing device for grain samples, including a machine chamber, a first motor, and a second motor. A working platform is connected to the machine chamber via a horizontally arranged rotating shaft. The second motor is driven by the working platform and is used to drive the working platform to rotate around the horizontally arranged rotating shaft. A turntable is rotatably connected to the middle of the working platform, and a sealed barrel is fixed on the turntable. The first motor is driven by the turntable and is used to drive the turntable to rotate around its own axis.

[0007] The beneficial effects of this utility model are: This invention utilizes a first motor to drive a turntable to rotate around its own axis, and a second motor to drive a working platform to rotate around a horizontal axis. This causes the grain sample inside the sealed container to tumble up and down while rotating around the axis of the sealed container, greatly improving the mixing efficiency and uniformity of the grain sample, resulting in consistent mixing effects each time. By using a sealed container, leakage of the grain sample during mixing is avoided, preventing sample loss and facilitating cleaning. Furthermore, manual operation only requires handling the loading and unloading of grain samples and disassembling the sealed container, reducing labor intensity and simplifying the operation.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, both the first motor and the second motor are fixed on the nacelle, and the output shaft of the first motor is coaxially arranged with the horizontally arranged rotating shaft; a reversing transmission box is also fixed on the working platform, the input shaft of the reversing transmission box is connected to the output shaft of the first motor, and the output shaft of the reversing transmission box is connected to the turntable.

[0010] Installing the first and second motors in the engine compartment avoids occupying space on the work platform, reduces the rotational inertia of the work platform, minimizes mechanical wear during startup and shutdown, and improves reliability. Furthermore, the motor wiring is unaffected by the rotation of the work platform, making wiring convenient. The reversing gearbox facilitates the deceleration and reversal of the power from the first motor and its transmission to the turntable, ensuring high transmission reliability.

[0011] Furthermore, a first fixing plate is fixed to the housing of the reversing gearbox, the lower end of the first fixing plate is fixed to one end of the working platform, a first gear is fixed to one side of the first fixing plate, and the second motor is connected to the first gear for transmission; a second fixing plate is fixed to the other end of the working platform, a flange shaft is fixed to the second fixing plate, and the flange shaft is rotatably connected to the side wall of the engine compartment; the flange shaft, the first gear, and the input shaft of the reversing gearbox are arranged coaxially.

[0012] The first gear is driven to rotate by the second motor. The first gear drives the working platform, the second fixed plate and the reversing transmission box to rotate around the axis of the first gear through the first fixed plate. This realizes the rotation of the working platform around the horizontally arranged shaft. The transmission has good reliability and the transmission components do not occupy the space above the working platform, thus avoiding structural interference.

[0013] Furthermore, the cabin is also equipped with a partition wall, which divides the internal cavity of the cabin into a working cavity and a power cavity. The first motor and the second motor are both located in the power cavity and fixed to the partition wall. The working platform, the first gear and the reversing transmission box are all located in the working cavity.

[0014] By separating the working chamber and the power chamber, the sample handling and the operation of the motor can be carried out separately without affecting each other. At the same time, it avoids food sample leakage and splashing onto electrical equipment such as wires, thus improving safety.

[0015] Furthermore, the top wall of the working chamber is provided with a first hatch, which is hinged to the engine compartment via a horizontally arranged hinge shaft; the power chamber is also provided with a detachable second hatch on the side wall away from the working chamber.

[0016] The first compartment cover can be flipped open and closed via a horizontally arranged hinge shaft, facilitating the loading and unloading of sealed containers and samples; the second compartment cover is detachable for installing structures such as motors, making maintenance convenient.

[0017] Furthermore, the input shaft of the reversing gearbox is connected to the partition wall via bearings, and the flange shaft is connected to the side wall of the engine compartment via bearings.

[0018] This helps reduce the resistance of the working platform relative to the engine room rotation, avoiding mechanical wear and interference.

[0019] Furthermore, a reduction gearbox is fixed on the partition wall. The input shaft of the reduction gearbox is connected to the output shaft of the second motor. The output shaft of the reduction gearbox passes through the partition wall and is fixed with a second gear. The second gear meshes with the first gear.

[0020] The gearbox facilitates the reduction of power from the second motor and its transmission to the work platform. The meshing transmission between the second gear and the first gear facilitates the rotation of the work platform, resulting in high transmission reliability.

[0021] Furthermore, the output shaft of the reversing gearbox passes downward through the working platform, and a vertical rotating shaft is fixed at the lower end of the turntable. One end of the vertical rotating shaft passes downward through the working platform and is connected to the output shaft of the reversing gearbox for transmission.

[0022] By having both the vertical rotating shaft and the output shaft of the reversing transmission box pass downwards through the working platform, the transmission structure is separated from the sealed container, avoiding structural interference and improving transmission reliability. At the same time, it prevents sample leakage from contaminating the transmission structure and reduces maintenance costs.

[0023] Furthermore, the vertical rotating shaft is connected to the output shaft of the reversing transmission box via a belt drive.

[0024] The long transmission distance makes it easier to increase the distance between the reversing gearbox and the sealing barrel, avoiding structural interference, and at the same time increasing the usable space on the work platform.

[0025] Furthermore, multiple mounting blocks are fixed on the lower outer wall of the sealing barrel, and the mounting blocks are evenly distributed along the circumference of the sealing barrel. The mounting blocks are connected to the turntable by bolts. The upper end of the sealing barrel is provided with a top cover, which is sealed to the sealing barrel.

[0026] The bolts between the mounting block and the turntable facilitate the disassembly and assembly of the sealed container; at the same time, the top cover can be opened to take out and put in samples, making operation convenient. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of this utility model.

[0028] Figure 2 This is a schematic diagram of the internal structure of this utility model.

[0029] In the accompanying drawings, the technical features represented by each reference numeral are as follows: 1- Engine compartment; 2- First motor; 3- Second motor; 4- Working platform; 5- Turntable; 6- Sealed barrel; 7- Reversing transmission box; 8- First fixed plate; 9- First gear; 10- Second fixed plate; 11- Flange shaft; 12- Separator wall; 13- Gearbox; 14- Second gear; 15- Vertical rotating shaft; 16- First hatch cover; 17- Second hatch cover; 18- Mounting block; 19- Top cover. Detailed Implementation

[0030] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0031] This utility model refers to Figure 1-2 .

[0032] This utility model provides a rapid mixing device for grain samples, including a chamber 1, a first motor 2 and a second motor 3. A working platform 4 is connected to the chamber 1 via a horizontally arranged rotating shaft. The second motor 3 is driven by the working platform 4 and is used to drive the working platform 4 to rotate around the horizontally arranged rotating shaft. A turntable 5 is rotatably connected to the middle of the working platform 4. A sealed barrel 6 is fixed on the turntable 5. The first motor 2 is driven by the turntable 5 and is used to drive the turntable 5 to rotate around its own axis.

[0033] principle: In use, place the grain sample into the sealed container 6, adding an appropriate amount of solvent. Then, fix the sealed container 6 onto the turntable 5 and start the first motor 2 and the second motor 3. The second motor 3 drives the working platform 4 to rotate, causing the sealed container 6 to continuously rotate up and down. Simultaneously, the first motor 2 drives the turntable 5 to rotate around its own axis, causing the sealed container 6 to rotate around its own axis. Thus, the grain sample inside the sealed container 6 can be rotated while simultaneously rotating up and down, facilitating rapid mixing.

[0034] In this embodiment, the first motor 2 can be mounted on the work platform 4, or it can be fixed to the mounting and arranged coaxially with the horizontally arranged rotating shaft. In addition, the orientation description of the work platform 4, such as up and down, is based on the static state shown in the figure; this is because the work platform 4 should be in the state shown in the figure after each work stop, that is, the sealed barrel 6 is facing upward, so the up and down changes of one side of the work platform 4 during the movement state can be ignored.

[0035] This invention utilizes a first motor 2 to drive a turntable 5 to rotate around its own axis, and a second motor 3 to drive a working platform 4 to rotate around a horizontal axis. This causes the grain sample inside the sealed container 6 to tumble up and down while rotating around the axis of the sealed container 6, greatly improving the mixing efficiency and uniformity of the grain sample, resulting in consistent mixing effects each time. By using the sealed container 6, leakage of the grain sample during mixing is avoided, preventing sample loss and facilitating cleaning. Furthermore, manual operation only requires handling the grain sample and disassembling the sealed container 6, resulting in low labor intensity and convenient operation.

[0036] Furthermore, both the first motor 2 and the second motor 3 are fixed on the engine compartment 1, and the output shaft of the first motor 2 is coaxially arranged with the horizontally arranged rotating shaft; a reversing transmission box 7 is also fixed on the working platform 4, the input shaft of the reversing transmission box 7 is connected to the output shaft of the first motor 2, and the output shaft of the reversing transmission box 7 is connected to the turntable 5.

[0037] Note: The horizontally arranged rotating shaft is rotatably connected to the engine compartment 1. The horizontally arranged rotating shaft can be a hollow shaft, or it can be the same shaft as the input shaft of the reversing transmission box 7. Preferably, the rotation speed of the working platform 4 is less than the rotation speed of the turntable 5.

[0038] The first motor 2 and the second motor 3 are installed in the engine compartment 1, which avoids occupying the space of the work platform 4. At the same time, it reduces the rotational inertia of the work platform 4, resulting in less mechanical wear during start-up and shutdown, and better reliability. In addition, the motor wiring is not affected by the rotation of the work platform 4, making wiring convenient. The reversing transmission box 7 facilitates the deceleration and reversal of the power of the first motor 2 and its transmission to the turntable 5, resulting in good transmission reliability.

[0039] Furthermore, a first fixing plate 8 is fixed to the housing of the reversing gearbox 7. The lower end of the first fixing plate 8 is fixed to one end of the working platform 4. A first gear 9 is fixed to one side of the first fixing plate 8. The second motor 3 is connected to the first gear 9 in a transmission connection. A second fixing plate 10 is fixed to the other end of the working platform 4. A flange shaft 11 is fixed on the second fixing plate 10. The flange shaft 11 is rotatably connected to the side wall of the engine compartment 1. The flange shaft 11, the first gear 9, and the input shaft of the reversing gearbox 7 are arranged coaxially.

[0040] The first gear 9 is driven to rotate by the second motor 3. The first gear 9 drives the working platform 4, the second fixed plate 10 and the reversing transmission box 7 to rotate around the axis of the first gear 9 through the first fixed plate 8. This realizes the rotation of the working platform 4 around the horizontally arranged shaft. The transmission has good reliability and the transmission components do not occupy the space on the upper side of the working platform 4, thus avoiding structural interference.

[0041] Furthermore, the cabin 1 is also provided with a partition wall 12, which divides the internal cavity of the cabin 1 into a working cavity and a power cavity. The first motor 2 and the second motor 3 are both located in the power cavity and fixed on the partition wall 12. The working platform 4, the first gear 9 and the reversing transmission box 7 are all located in the working cavity.

[0042] By separating the working chamber and the power chamber, the sample handling and the operation of the motor can be carried out separately without affecting each other. At the same time, it avoids food sample leakage and splashing onto electrical equipment such as wires, thus improving safety.

[0043] Furthermore, a first hatch 16 is provided on the top wall of the working cavity, and the first hatch 16 is hinged to the engine compartment 1 via a horizontally arranged hinge shaft; a detachable second hatch 17 is also provided on the side wall of the power cavity away from the working cavity.

[0044] Preferably, the second hatch 17 is bolted to the engine room 1.

[0045] The first cover 16 can be flipped open and closed via a horizontally arranged hinge shaft, making it easy to put in and take out the sealed container 6 and samples; the second cover 17 is detachable for installing structures such as motors, making maintenance convenient.

[0046] Furthermore, the input shaft of the reversing gearbox 7 is connected to the partition wall 12 via bearings, and the flange shaft 11 is connected to the side wall of the cabin 1 via bearings.

[0047] This helps reduce the resistance of the working platform 4 rotating relative to the cabin 1, and avoids mechanical wear and interference.

[0048] Furthermore, a reduction gearbox 13 is also fixed on the partition wall 12. The input shaft of the reduction gearbox 13 is connected to the output shaft of the second motor 3. The output shaft of the reduction gearbox 13 passes through the partition wall 12 and is fixed with a second gear 14. The second gear 14 meshes with the first gear 9.

[0049] The reduction gearbox 13 facilitates the reduction of power from the second motor 3 and its transmission to the working platform 4. The second gear 14 meshes with the first gear 9 to drive the working platform 4 to rotate, ensuring good transmission reliability.

[0050] Furthermore, the output shaft of the reversing gearbox 7 passes downward through the working platform 4, and a vertical rotating shaft 15 is fixed at the lower end of the turntable 5. One end of the vertical rotating shaft 15 passes downward through the working platform 4 and is connected to the output shaft of the reversing gearbox 7 for transmission.

[0051] By having the vertical rotating shaft 15 and the output shaft of the reversing transmission box 7 both pass downward through the working platform 4, the transmission structure is separated from the sealed barrel 6, avoiding structural interference and improving transmission reliability; at the same time, it avoids sample leakage and contamination of the transmission structure, resulting in low maintenance costs.

[0052] Furthermore, the vertical rotating shaft 15 is connected to the output shaft of the reversing transmission box 7 via belt drive.

[0053] Specifically, a first pulley is fixed on the vertical rotating shaft 15, and a second pulley is fixed on the output shaft of the reversing transmission box 7. The first pulley and the second pulley are connected by belt drive.

[0054] The long transmission distance makes it easier to increase the distance between the reversing transmission box 7 and the sealing barrel 6, avoiding structural interference, and at the same time increasing the usable space on the work platform 4.

[0055] Furthermore, a plurality of mounting blocks 18 are fixed on the lower outer wall of the sealing barrel 6. The plurality of mounting blocks 18 are evenly distributed along the circumference of the sealing barrel 6, and the mounting blocks 18 are connected to the turntable 5 by bolts. The upper end of the sealing barrel 6 is provided with an upper cover 19, which is sealed to the sealing barrel 6.

[0056] Preferably, the top cover 19 and the sealing barrel 6 are connected by threads or flanges to achieve a seal.

[0057] The bolts between the mounting block 18 and the turntable 5 facilitate the disassembly and assembly of the sealing barrel 6; at the same time, the top cover 19 can be opened to take out and put in samples, making operation convenient.

[0058] In the description of this utility model, it should be understood that if descriptive terms indicating orientation, direction, or positional relationship appear, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc., the orientation or positional relationship indicated in this specification is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of understanding this utility model and simplifying the description, and does not indicate or imply that the part, element, or whole referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0059] Furthermore, if sequential descriptive terms such as "first," "second," etc., appear, their purpose in this specification is for ease of understanding or simplification. For example, to distinguish multiple technical features of the same type or function, which must be mentioned separately, this specification may use prefixes or suffixes to differentiate them. Therefore, they should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first," "second," etc., may explicitly or implicitly include at least one of those features. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0060] In this utility model, if descriptive terms describing structural relationships are used, such as "installation," "connection," "joining," and "fixing," they should be interpreted broadly unless otherwise explicitly specified and limited. For example, "installation," "connection," and "joining" can refer to a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. "Fixing" can refer to an integral fixation or a detachable fixation using fasteners; it can be a direct fixation or a fixation through an intermediate medium. For those skilled in the art, the specific meaning of the above descriptive terms in this utility model can be understood based on the specific circumstances, the context, and the coherence of the preceding and following text.

[0061] In this utility model, if descriptive terms containing subordinate or connecting meanings appear, such as "above" or "below" the second feature, they should not be interpreted restrictively unless otherwise explicitly specified and limited. For example, "above" or "below" can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. For those skilled in the art, the specific meaning of the above descriptive terms in this utility model can be understood according to the specific circumstances, the context, and the coherence of the preceding and following text.

[0062] Furthermore, "above," "on top of," and "above" the first feature in relation to the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0063] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. The illustrative expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments, examples, and features described in this specification, and such combinations or integrations should all fall within the scope of the present invention.

[0064] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Variations, modifications, substitutions, and modifications made by those skilled in the art to the above embodiments within the scope of information available through public channels and in conjunction with the technical teachings given in this application are still covered within the protection scope of this application.

Claims

1. A rapid mixing device for grain samples, characterized in that: The system includes a cabin (1), a first motor (2), and a second motor (3). A working platform (4) is connected to the cabin (1) via a horizontally arranged rotating shaft. The second motor (3) is connected to the working platform (4) and is used to drive the working platform (4) to rotate around the horizontally arranged rotating shaft. A turntable (5) is rotatably connected to the middle of the working platform (4). A sealed barrel (6) is fixed on the turntable (5). The first motor (2) is connected to the turntable (5) and is used to drive the turntable (5) to rotate around its own axis.

2. The rapid mixing device for grain samples according to claim 1, characterized in that: The first motor (2) and the second motor (3) are both fixed on the cabin (1), and the output shaft of the first motor (2) is coaxially arranged with the horizontally arranged rotating shaft; a reversing transmission box (7) is also fixed on the working platform (4), the input shaft of the reversing transmission box (7) is connected to the output shaft of the first motor (2), and the output shaft of the reversing transmission box (7) is connected to the turntable (5).

3. The rapid mixing device for grain samples according to claim 2, characterized in that: The reversing gearbox (7) is also fixed with a first fixing plate (8), the lower end of the first fixing plate (8) is fixed to one end of the working platform (4), and a first gear (9) is fixed on one side of the first fixing plate (8). The second motor (3) is connected to the first gear (9) in a transmission connection. The other end of the working platform (4) is also fixed with a second fixing plate (10), and a flange shaft (11) is fixed on the second fixing plate (10). The flange shaft (11) is rotatably connected to the side wall of the engine room (1). The flange shaft (11), the first gear (9) and the input shaft of the reversing gearbox (7) are arranged coaxially.

4. The rapid mixing device for grain samples according to claim 3, characterized in that: The cabin (1) is also provided with a partition wall (12), which divides the internal cavity of the cabin (1) into a working cavity and a power cavity. The first motor (2) and the second motor (3) are both located in the power cavity and fixed on the partition wall (12). The working platform (4), the first gear (9) and the reversing transmission box (7) are all located in the working cavity.

5. The rapid mixing device for grain samples according to claim 4, characterized in that: The top wall of the working chamber is provided with a first hatch (16), which is hinged to the engine room (1) via a horizontally arranged hinge shaft; the power chamber is also provided with a detachable second hatch (17) on the side wall away from the working chamber.

6. The rapid mixing device for grain samples according to claim 4, characterized in that: The input shaft of the reversing gearbox (7) is connected to the partition wall (12) by bearings, and the flange shaft (11) is connected to the side wall of the cabin (1) by bearings.

7. The rapid mixing device for grain samples according to claim 4, characterized in that: A reduction gearbox (13) is also fixed on the partition wall (12). The input shaft of the reduction gearbox (13) is connected to the output shaft of the second motor (3). The output shaft of the reduction gearbox (13) passes through the partition wall (12) and is fixed with a second gear (14). The second gear (14) meshes with the first gear (9).

8. The rapid mixing device for grain samples according to claim 2, characterized in that: The output shaft of the reversing gearbox (7) passes downward through the working platform (4), and a vertical rotating shaft (15) is fixed at the lower end of the turntable (5). One end of the vertical rotating shaft (15) passes downward through the working platform (4) and is connected to the output shaft of the reversing gearbox (7) for transmission.

9. The rapid mixing device for grain samples according to claim 8, characterized in that: The vertical rotating shaft (15) is connected to the output shaft of the reversing transmission box (7) via belt drive.

10. The rapid mixing device for grain samples according to claim 1, characterized in that: Multiple mounting blocks (18) are fixed on the lower outer wall of the sealing barrel (6). The multiple mounting blocks (18) are evenly distributed along the circumference of the sealing barrel (6). The mounting blocks (18) are connected to the turntable (5) by bolts. The upper end of the sealing barrel (6) is provided with a top cover (19), which is sealed to the sealing barrel (6).