Soil multi-point mixed sampling device

Abstract

The invention relates to the technical field of soil detection, and discloses a soil multi-point mixed sampling device which comprises a stand column, a sampling auxiliary mechanism, a sampling executing mechanism and a soil sample recycling mechanism. An operating rod is vertically arranged on the top of the stand column. The sampling auxiliary mechanism is used for forming a sampling area on the ground, and the sampling area is separated from soil to form a vertical cutting seam. The sampling executing mechanism comprises an annular sleeve installed on the outer side of the operating rod, a telescopic piece capable of rotating in the vertical direction and installed on the outer side of the annular sleeve, a middle pipe fixed relative to the telescopic piece, a sampling pipe movably arranged on the middle pipe in a sleeving mode and a power unit driving the sampling pipe to slide, and the power unit drives the sampling pipe to be inserted into soil and cross the cutting seam; and sampling can be realized. The device has the remarkable advantages of being compact in structure, comprehensive in function, high in automation degree, high in sampling representativeness and the like, is suitable for various scenes such as agricultural soil detection, environment evaluation and geological exploration, and has good popularization and application prospects.

Description

Technical Field

[0001] The present invention relates to the technical field of soil detection, and in particular to a soil multi-point mixed sampling device. Background Art

[0002] Soil sampling is an essential and fundamental process in fields such as agricultural production, environmental monitoring, pollution assessment, and geological exploration. Traditional soil sampling methods rely on manual sampling using shovels or drilling tools. This is not only cumbersome and labor-intensive, but also easily causes soil disturbance, affecting sample representativeness and the accuracy of analytical results. Traditional methods are particularly inefficient when mixed analysis of multiple sampling points is required, making them unable to meet the dual requirements of accuracy and efficiency required by modern soil testing.

[0003] Although some existing automatic sampling devices integrate electric drive and sampling structure, they still have shortcomings in sampling range, depth adjustment, multi-point mixing processing, etc. Summary of the Invention

[0004] In order to solve the technical problems raised in the background technology, the present invention provides a soil multi-point mixed sampling device.

[0005] The present invention is implemented by adopting the following technical solution: a soil multi-point mixed sampling device, comprising a column, a sampling auxiliary mechanism, a sampling execution mechanism, and a soil sample recovery mechanism.

[0006] An operating rod is vertically arranged on the top of the column.

[0007] The sampling auxiliary mechanism is used to form a sampling area on the ground, and the sampling area is separated from the soil to form a vertical cutting seam.

[0008] The sampling actuator includes an annular sleeve installed on the outside of the operating rod, a telescopic part that can rotate vertically and is installed on the outside of the annular sleeve, an intermediate tube fixed relative to the telescopic part, a sampling tube movably sleeved on the intermediate tube, and a power unit that drives the sampling tube to slide. The power unit drives the sampling tube to insert into the soil and cross the cutting seam to achieve sampling.

[0009] The soil sample recovery mechanism includes a sampling box fixed on the outside of the operating rod. The bottom of the sampling box is provided with a notch and an opening and closing mechanism for opening and closing the notch. By rotating the sampling actuator, the soil sample in the sampling tube enters the sampling box through the notch.

[0010] The above scheme uses a sampling auxiliary mechanism to first form a cutting slit, then inserts a sampling tube to achieve sampling. The soil sample enters the sampling box under the action of the rotating structure. This effectively avoids soil disturbance, improves the representativeness and accuracy of sampling, and realizes automatic collection and packaging.

[0011] As a further improvement of the above scheme, the sampling auxiliary mechanism includes a fixed plate, a driving member, a movable plate, a connecting frame and a cutting plate. The fixed plate and the operating rod are fixedly connected, and the movable plate is movably sleeved on the outside of the operating rod. The two ends of the driving member are respectively connected to the fixed plate and the movable plate. The bottom of the movable plate is coaxially sleeved with a sleeve movably connected to the operating rod. Several connecting frames are distributed circumferentially on the outside of the sleeve. A cutting plate is fixed to the bottom end of each connecting frame, and the bottom of the cutting plate has a blade.

[0012] Through the above scheme, the driving member drives the movable plate to move up and down, so that the cutting plate cuts the soil along the circumference of the operating rod to form a sampling area. It can quickly and efficiently separate the soil in the target sampling area and ensure the accuracy of subsequent sampling.

[0013] As a further improvement of the above scheme, the cutting plate is an arc-shaped structure, and the position of the cutting plate from the center line of the operating rod can be adjusted through a connecting frame, which includes connecting rod one, an adjusting sleeve and connecting rod two, wherein one end of connecting rod one is fixed to the sleeve, and the two ends of the adjusting sleeve are spirally connected to the ends of connecting rod one and connecting rod two respectively, and connecting rod two is an L-shaped rod, and the bottom end of connecting rod two is connected to the cutting plate.

[0014] Through the above solution, the distance between the cutting plate and the operating rod can be changed by adjusting the sleeve, thereby achieving different ranges of sampling area settings. This can improve the adaptability of the device and can be flexibly applied to soil environments with different particle sizes and densities.

[0015] As a further improvement of the above scheme, the annular sleeve can be rotatably mounted on the outside of the operating rod, and a motor for driving the annular sleeve to rotate is installed on the bottom surface of the sampling box. The output shaft of the motor is connected to a driving gear, and a gear ring is coaxially mounted on the top of the annular sleeve, wherein the driving gear and the gear ring are meshed.

[0016] In this solution, the motor drives the gear to rotate, which in turn drives the annular sleeve and the entire sampling assembly to rotate. This allows the sampling tube to be inserted and sampled at different locations in the sampling area, effectively improving the efficiency of multi-point sampling.

[0017] As a further improvement of the above scheme, two parallel clamping plates are provided on the outside of the annular sleeve, and a micro motor is provided on the outside of one of the clamping plates to drive the telescopic part to rotate. The telescopic part uses an electric push rod, and the output end of the telescopic part can be telescopically movable in the middle tube. The output end of the telescopic part can be extended into the sampling tube to push out the soil sample therein.

[0018] Through this solution, a micromotor controls the movement of the telescopic element, pushing the soil sample out of the sampling tube and guiding it into the sampling box. This enables automatic transfer of soil samples, avoids sample loss, and improves the automation level of the system.

[0019] As a further improvement of the above scheme, the power unit includes a unloading push rod and a slider. A strip hole is opened at the bottom of the intermediate tube along the length direction. The slider is slidably connected to the strip hole, and the slider is connected to the outer wall of the inner end of the sampling tube. The unloading push rod is fixed on the outside of the intermediate tube, and the output end of the unloading push rod is connected to the slider. A circular tool is provided at the outer end of the sampling tube to facilitate insertion into the soil.

[0020] With this solution, the unloading push rod drives the slider to slide, pushing the soil sample out of the sampling tube, while the cutter assists in inserting the soil. This improves the efficiency of insertion and unloading, and is suitable for ground surfaces of varying hardness.

[0021] As a further improvement of the above scheme, the opening and closing mechanism includes an opening and closing motor, a mounting shaft, a rotating plate, a side plate 1, and a sealing plate, wherein the opening and closing motor is fixed on the sampling box, the mounting shaft is connected to the output end of the opening and closing motor, the rotating plate is arranged parallel to the top of the sampling box, and one end of the rotating plate is fixed on the mounting shaft, the side plate 1 is arranged vertically, the top end of the side plate 1 is connected to one end of the rotating plate, and the bottom end of the side plate 1 is connected to the sealing plate, and the sealing plate is located below the sampling box and can be embedded in and seal the gap.

[0022] Through this solution, the opening and closing motor automatically opens and closes the sampling port by rotating the plate to link the side plate and the sealing plate. This solution can automatically control the opening and closing of the sampling port, improving the sealing and sample preservation capabilities.

[0023] As a further improvement of the above scheme, electromagnets are respectively provided on the top surface of the sampling box and the bottom surface of the rotating plate. When the two electromagnets are energized, they can magnetically attract or repel each other to change the height of the sealing plate, and a return spring is provided on the outside of the mounting shaft located below the rotating plate.

[0024] Through this solution, the electromagnet and spring control the height of the sealing plate, precisely adjusting the opening process of the sampling hole. The structure responds quickly and the control accuracy is high.

[0025] As a further improvement of the above scheme, a soil sample cutting mechanism is also provided on the outside of side plate 1, and the soil sample cutting mechanism includes a side plate 2 movably provided on the outside of side plate 1 and parallel thereto, and an adjusting member fixed on side plate 2. The output end of the adjusting member is connected to side plate 1, and a horizontal cutting plate is fixed to the bottom of side plate 2. A through hole is provided in the sealing plate, which is slidably connected to the cutting plate. The cutting plate can cut off the soil sample extending out of the sampling tube through the through hole.

[0026] Through this solution, the adjustment member controls the movement of the cutting plate, which cooperates with the perforation of the sealing plate to achieve precise cutting of the soil sample. This solution can cut samples to fixed lengths, facilitating standardized analysis and segmented testing.

[0027] As a further improvement of the above scheme, several groups of stirring and mixing mechanisms are also provided in the sampling box, and the stirring and mixing mechanisms include a stirring shaft and several stirring tools arranged on the outside of the stirring shaft. The stirring shaft is arranged along the height direction of the sampling box, and the top end of the stirring shaft is movably extended out of the sampling box. A stirring power device that drives each stirring shaft to rotate can be installed on the top of the sampling box.

[0028] Through this solution, the drive device drives the stirring shaft to rotate, allowing multiple stirring blades to act simultaneously on the soil sample, creating a uniform mix. Based on this, this solution can improve mixing uniformity and ensure sample representativeness, making it suitable for multi-point mixed sampling needs.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. High-precision cutting and sampling positioning: By setting the arc-shaped cutting plate and the adjustment connection frame in the sampling auxiliary mechanism, the sampling area can be formed in advance, soil disturbance can be reduced, the sampling range can be accurately defined, and the representativeness and consistency of the sampling can be improved.

[0031] 2. Multi-point sampling and angle control function: The sampling actuator uses a motor-driven circular rotating structure to achieve multi-angle and multi-point soil insertion sampling in the same sampling area, thereby improving the uniformity and regional coverage of mixed samples.

[0032] 3. Automatic transfer and packaging mechanism: The sampling tube is equipped with a built-in telescopic unloading mechanism, which can automatically push the soil sample out and import it into the sampling box. It cooperates with the opening and closing motor and the magnetically controlled sealing plate to achieve automatic sealing, ensuring the sealing of the sample and on-site work efficiency.

[0033] 4. Truncation and standardized segmentation design: The truncation mechanism configured at the bottom of the sampling box can cut the soil sample into a fixed length, which is suitable for segmented analysis and standardized processing, enhancing the practicality and intelligence level of the equipment.

[0034] 5. Integrated mixing mechanism: It has multiple sets of mixing tools and power devices built in, which can fully mix the soil samples collected at multiple points, improve the mixing uniformity of the samples, and meet the needs of multi-point composite testing.

[0035] In summary, the present invention has significant advantages such as compact structure, comprehensive functions, high degree of automation, and strong sampling representativeness. It is suitable for various scenarios such as agricultural soil testing, environmental assessment, and geological exploration, and has good promotion and application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a three-dimensional diagram of the overall structure of the soil multi-point mixed sampling device proposed by the present invention;

[0037] Figure 2 This is a three-dimensional diagram of the soil multi-point mixed sampling device proposed by the present invention from another perspective;

[0038] Figure 3 This is a front view of the soil multi-point mixed sampling device proposed by the present invention;

[0039] Figure 4 This is a schematic diagram of the three-dimensional structure of a partial structure of the soil multi-point mixed sampling device proposed by the present invention when viewed from below;

[0040] Figure 5 For the present invention Figure 1 A magnified view of point A;

[0041] Figure 6 For the present invention Figure 2 Enlarged view of point B;

[0042] Figure 7 This is a schematic diagram of the sampling principle of the sampling tube of the present invention.

[0043] Description of main symbols:

[0044] In the figure: column 1, operating rod 2, fixed plate 3, driving member 4, movable plate 5, connecting rod 1 6, adjusting sleeve 7, connecting rod 2 8, cutting plate 9, blade 10, notch 11, stirring and mixing mechanism 12, motor 13, driving gear 14, sampling box 15, notch 16, sampling actuator 17, annular sleeve 18, mounting hole 19, opening and closing motor 20, return spring 21, rotating plate 22, electromagnet 23, side plate 1 24, sealing plate 2401, adjusting member 25, side plate 2 26, cutting plate 27, gear ring 28, splint 29, telescopic member 30, unloading push rod 31, slider 32, sampling tube 33, intermediate tube 34, cutting slit 35, sampling area 36. DETAILED DESCRIPTION

[0045] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0046] Example 1:

[0047] Reference Figure 1-Figure 7 The present invention proposes a soil multi-point mixed sampling device, comprising a column 1, a sampling auxiliary mechanism, a sampling execution mechanism, and a soil sample recovery mechanism;

[0048] An operating rod 2 is vertically arranged on the top of the column 1; the operating rod 2 and the top of the column 1 form a "cross", which is convenient for hand-held operation, and a protective cover is provided on the surface of the operating rod 2, which is more convenient and comfortable to use.

[0049] The sampling auxiliary mechanism is used to form a sampling area 36 on the ground, and the sampling area 36 is separated from the soil to form a vertical cutting seam 35.

[0050] The sampling actuator 17 includes an annular sleeve 18 mounted on the outside of the operating rod 2, a telescopic member 30 that can rotate vertically and is mounted on the outside of the annular sleeve 18, an intermediate tube 34 fixed relative to the telescopic member 30, a sampling tube 33 that is movably sleeved on the intermediate tube 34, and a power unit that drives the sampling tube 33 to slide. The power unit drives the sampling tube 33 into the soil and across the cutting slit 35 to achieve sampling.

[0051] The soil sample recovery mechanism includes a sampling box 15 fixed on the outside of the operating rod 2. The bottom of the sampling box 15 is provided with a notch 16 and an opening and closing mechanism for opening and closing the notch 16. By rotating the sampling actuator 17, the soil sample in the sampling tube 33 enters the sampling box 15 through the notch 16.

[0052] In this solution, a sampling aid creates a slit before sampling is performed by inserting a sampling tube. The soil sample then enters the sampling box under the action of a rotating sampling actuator. This effectively avoids soil disturbance, improves sample representativeness and accuracy, and enables automated collection and packaging. Furthermore, the sampling actuator can be rotated, allowing for controlled acquisition of soil samples at varying depths.

[0053] As an optional embodiment of the present invention, the sampling auxiliary mechanism includes a fixed plate 3, a driving member 4, a movable plate 5, a connecting frame and a cutting plate 9. The fixed plate 3 is fixedly connected to the operating rod 2, and the movable plate 5 is movably sleeved on the outside of the operating rod 2. The two ends of the driving member 4 are respectively connected to the fixed plate 3 and the movable plate 5. The bottom of the movable plate 5 is coaxially sleeved with a sleeve movably connected to the operating rod 2. Several connecting frames are distributed circumferentially on the outside of the sleeve. A cutting plate 9 is fixed to the bottom end of each connecting frame, and the bottom of the cutting plate 9 has a blade 10. The depth and width of the cutting seam are controlled according to actual needs. For example, by selecting cutting plates 9 of different sizes, cutting seams of different specifications can be formed. The driving member 4 can be an electric push rod, which can be used with an external power supply. The size and power of the electric push rod can be selected according to actual needs.

[0054] In this solution, a drive member drives the movable plate up and down, causing the cutting plate to cut the soil along the circumference of the operating rod to form a sampling area. This can quickly and efficiently separate the soil in the target sampling area, ensuring the accuracy of subsequent sampling.

[0055] As an optional embodiment of the present invention, the cutting plate 9 is an arc-shaped structure, and the cutting seam formed in this way is also arc-shaped. If the cutting plate 9 is a straight line, the corresponding cutting seam is also a straight line, and the position of the cutting plate 9 from the center line of the operating rod can be adjusted by a connecting frame. The connecting frame includes a connecting rod 1 6, an adjusting sleeve 7 and a connecting rod 2 8, wherein one end of the connecting rod 1 6 is fixed to the sleeve, and the two ends of the adjusting sleeve 7 are spirally connected to the ends of the connecting rod 1 6 and the connecting rod 2 8 respectively, and the connecting rod 2 8 is an L-shaped rod, and the bottom end of the connecting rod 2 8 is connected to the cutting plate 9.

[0056] In this solution, the distance between the cutting plate and the operating rod can be changed by adjusting the sleeve, thereby obtaining sampling areas of different sizes. This setting can improve the adaptability of the device and can be flexibly applied to soil environments with different particle sizes and densities.

[0057] As an optional embodiment of the present invention, the annular sleeve 18 can be rotatably sleeved on the outside of the operating rod 2, and a motor 13 for driving the annular sleeve 18 to rotate is installed on the bottom surface of the sampling box 15. The output shaft of the motor 13 is connected to the driving gear 14, and a gear ring 28 is coaxially sleeved on the top of the annular sleeve 18, wherein the driving gear 14 and the gear ring 28 are engaged.

[0058] In this solution, the motor drives the gear to rotate, which in turn drives the annular sleeve and the entire sampling assembly to rotate. This allows the sampling tube to be inserted and sampled at different locations in the sampling area, effectively improving the efficiency of multi-point sampling.

[0059] As an optional embodiment of the present invention, two parallel clamping plates 29 are provided on the outside of the annular sleeve 18, and a micro motor is provided on the outside of one of the clamping plates 29 to drive the telescopic member 30 to rotate. The telescopic member 30 uses an electric push rod, and the output end of the telescopic member 30 can be telescopically movable in the intermediate tube 34. The output end of the telescopic member 30 can be extended into the sampling tube 33 to push out the soil sample therein.

[0060] In this solution, a micromotor controls the movement of the telescopic element, pushing the soil sample out of the sampling tube and into the sampling box. This enables automatic transfer of soil samples, avoids sample loss, and improves the system's automation level.

[0061] As an optional embodiment of the present invention, the power unit includes a unloading push rod 31 and a slider 32. A strip hole is opened at the bottom of the intermediate tube 34 along the length direction. The slider 32 is slidably connected to the strip hole, and the slider 32 is connected to the inner end outer wall of the sampling tube 33. The unloading push rod 31 is fixed on the outer side of the intermediate tube 34, and the output end of the unloading push rod 31 is connected to the slider 32. The outer end of the sampling tube 33 is provided with a circular cutter to facilitate insertion into the soil.

[0062] In this solution, the unloading push rod drives the slider to push the soil sample out of the sampling tube, while the cutter assists in inserting the soil. This improves insertion and unloading efficiency and adapts to different ground hardnesses. In this solution, the unloading push rod can also be operated by an electric push rod.

[0063] As an optional embodiment of the present invention, the opening and closing mechanism includes an opening and closing motor 20, a mounting shaft, a rotating plate 22, a side plate 24, and a sealing plate 2401, wherein the opening and closing motor 20 is fixed on the sampling box 15, the mounting shaft is connected to the output end of the opening and closing motor 20, the rotating plate 22 is arranged parallel to the top of the sampling box 15, and one end of the rotating plate 22 is fixed on the mounting shaft, the side plate 24 is arranged vertically, the top end of the side plate 24 is connected to one end of the rotating plate 22, and the bottom end of the side plate 24 is connected to the sealing plate 2401, and the sealing plate 2401 is located below the sampling box 15 and can be embedded in and seal the gap 16.

[0064] In this solution, the opening and closing motor automatically opens and closes the sampling port by rotating the plate, linking the side plate and the sealing plate. This solution can automatically control the opening and closing of the sampling port, improving the sealing and sample preservation capabilities.

[0065] As an optional embodiment of the present invention, electromagnets 23 are respectively provided on the top surface of the sampling box 15 and the bottom surface of the rotating plate 22. When the two electromagnets 23 are energized, they can magnetically attract or repel each other to change the height of the sealing plate 2401, and a return spring 21 is provided on the outside of the mounting shaft below the rotating plate 22.

[0066] In this solution, an electromagnet works with a spring to control the height of the sealing plate, precisely regulating the opening of the sampling hole. This structure provides rapid response and high control accuracy.

[0067] As an optional embodiment of the present invention, a soil sample cutting mechanism is further provided on the outside of the side plate 1 24, and the soil sample cutting mechanism includes a side plate 26 movably provided on the outside of the side plate 1 24 and parallel thereto, and an adjusting member 25 fixed on the side plate 2. The output end of the adjusting member 25 is connected to the side plate 1 24, and a horizontal cutting plate 27 is fixed to the bottom of the side plate 26. A through hole is provided in the sealing plate 2401, which is slidably connected to the cutting plate 27. The cutting plate 27 can cut off the soil sample extending out of the sampling tube 33 through the through hole.

[0068] In this solution, an adjustment member controls the movement of the cutting plate, which, in conjunction with the perforation of the sealing plate, allows for precise cutting of the soil sample. This solution allows for cutting samples to fixed lengths, facilitating standardized analysis and segmented testing.

[0069] As an optional embodiment of the present invention, several groups of stirring and mixing mechanisms 12 are also provided in the sampling box 15. The stirring and mixing mechanisms 12 include a stirring shaft and several stirring tools arranged on the outside of the stirring shaft. The stirring shaft is arranged along the height direction of the sampling box, and the top end of the stirring shaft is movably extended out of the sampling box 15. A stirring power device for driving each stirring shaft to rotate can be installed on the top of the sampling box 15.

[0070] In this solution, a drive mechanism rotates the stirring shaft, allowing multiple stirring blades to simultaneously act on the soil sample, creating a uniform mix. This improves mixing uniformity, ensures representative sampling, and is suitable for multi-point mixed sampling needs.

[0071] The driving device of the present invention can control the rotation of the stirring shaft by independently setting up a motor, or a single motor can be set to work in conjunction with a transmission mechanism linked to each stirring shaft. The specific rotation is based on actual conditions. As long as each stirring shaft can rotate in the sampling box, the soil sample therein can be crushed and then mixed.

[0072] The above embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A soil multi-point mixed sampling device, characterized in that: It includes a column (1), a sampling auxiliary mechanism, a sampling execution mechanism, and a soil sample recovery mechanism; An operating rod (2) is vertically arranged on the top of the column (1); The sampling auxiliary mechanism is used to form a sampling area (36) on the ground, and the sampling area (36) is separated from the soil to form a vertical cutting seam (35); The sampling actuator (17) comprises an annular sleeve (18) mounted on the outside of the operating rod (2), a telescopic member (30) which can rotate vertically and is mounted on the outside of the annular sleeve (18), an intermediate tube (34) fixed relative to the telescopic member (30), a sampling tube (33) movably sleeved on the intermediate tube (34), and a power unit for driving the sampling tube (33) to slide, wherein the power unit drives the sampling tube (33) to be inserted into the soil and pass over the cutting slit (35), thereby achieving sampling; The soil sample recovery mechanism comprises a sampling box (15) fixed on the outside of the operating rod (2); a notch (16) and an opening and closing mechanism for opening and closing the notch (16) are provided at the bottom of the sampling box (15); and the soil sample in the sampling tube (33) is allowed to enter the sampling box (15) through the notch (16) by rotating the sampling actuator (17).

2. A soil multi-point mixed sampling device according to claim 1, characterized in that: The sampling auxiliary mechanism comprises a fixed plate (3), a driving member (4), a movable plate (5), a connecting frame and a cutting plate (9); the fixed plate (3) and the operating rod (2) are fixedly connected; the movable plate (5) is movably sleeved on the outside of the operating rod (2); the two ends of the driving member (4) are respectively connected to the fixed plate (3) and the movable plate (5); the bottom of the movable plate (5) is coaxially sleeved with a sleeve movably connected to the operating rod (2); a plurality of connecting frames are circumferentially distributed on the outside of the sleeve; a cutting plate (9) is fixed to the bottom end of each connecting frame; and the bottom of the cutting plate (9) has a blade (10).

3. A soil multi-point mixed sampling device as claimed in claim 1, characterized in that: The cutting plate (9) is an arc-shaped structure, and the position of the cutting plate (9) from the center line of the operating rod can be adjusted by a connecting frame, which includes a connecting rod (6), an adjusting sleeve (7) and a connecting rod (8), wherein one end of the connecting rod (6) is fixed to the sleeve, and the two ends of the adjusting sleeve (7) are respectively spirally connected to the ends of the connecting rod (6) and the connecting rod (8), and the connecting rod (8) is an L-shaped rod, and the bottom end of the connecting rod (8) is connected to the cutting plate (9).

4. A soil multi-point mixed sampling device according to claim 1, characterized in that: The annular sleeve (18) is rotatably sleeved on the outside of the operating rod (2), and a motor (13) for driving the annular sleeve (18) to rotate is installed on the bottom surface of the sampling box (15). The output shaft of the motor (13) is connected to a driving gear (14), and a gear ring (28) is coaxially sleeved on the top of the annular sleeve (18), wherein the driving gear (14) and the gear ring (28) are engaged.

5. A soil multi-point mixed sampling device as claimed in claim 1, characterized in that: Two parallel clamping plates (29) are provided on the outer side of the annular sleeve (18), and a micro motor is provided on the outer side of one of the clamping plates (29) to drive the telescopic member (30) to rotate. The telescopic member (30) is an electric push rod, and the output end of the telescopic member (30) can be telescopically movable in the middle tube (34). The output end of the telescopic member (30) can be extended into the sampling tube (33) to push out the soil sample therein.

6. A soil multi-point mixed sampling device as claimed in claim 1, characterized in that: The power unit comprises a discharge push rod (31) and a slider (32). A strip hole is provided at the bottom of the intermediate tube (34) along the length direction. The slider (32) is slidably connected to the strip hole, and the slider (32) is connected to the outer wall of the inner end of the sampling tube (33). The discharge push rod (31) is fixed to the outer side of the intermediate tube (34). The output end of the discharge push rod (31) is connected to the slider (32). A circular cutter is provided at the outer end of the sampling tube (33) to facilitate insertion into the soil.

7. A soil multi-point mixed sampling device as claimed in claim 1, characterized in that: The opening and closing mechanism includes an opening and closing motor (20), a mounting shaft, a rotating plate (22), a side plate (24), and a sealing plate (2401), wherein the opening and closing motor (20) is fixed on the sampling box (15), the mounting shaft is connected to the output end of the opening and closing motor (20), the rotating plate (22) is arranged parallel to the top of the sampling box (15), and one end of the rotating plate (22) is fixed on the mounting shaft, the side plate (24) is arranged vertically, the top end of the side plate (24) is connected to one end of the rotating plate (22), and the bottom end of the side plate (24) is connected to the sealing plate (2401), and the sealing plate (2401) is located below the sampling box (15) and can be embedded in and seal the gap (16).

8. The soil multi-point mixed sampling device according to claim 1, characterized in that: The top surface of the sampling box (15) and the bottom surface of the rotating plate (22) are respectively provided with electromagnets (23). When the two electromagnets (23) are energized, they can magnetically attract or repel each other to change the height of the sealing plate (2401), and a return spring (21) is provided on the outside of the mounting shaft below the rotating plate (22).

9. The soil multi-point mixed sampling device according to claim 1, characterized in that: A soil sample cutting mechanism is also provided on the outside of the side plate 1 (24), and the soil sample cutting mechanism includes a side plate 2 (26) movably provided on the outside of the side plate 1 (24) and parallel thereto, and an adjusting member (25) fixed on the side plate 2, the output end of the adjusting member (25) is connected to the side plate 1 (24), and a horizontal cutting plate (27) is fixed to the bottom of the side plate 2 (26), and a through hole is provided in the sealing plate (2401) for sliding connection with the cutting plate (27), and the cutting plate (27) can cut off the soil sample extending out of the sampling tube (33) through the through hole.

10. The soil multi-point mixed sampling device according to claim 1, characterized in that: The sampling box (15) is further provided with a plurality of stirring and mixing mechanisms (12), the stirring and mixing mechanisms (12) comprising a stirring shaft and a plurality of stirring cutters arranged outside the stirring shaft, the stirring shaft being arranged along the height direction of the sampling box, and the top end of the stirring shaft being movably extended out of the sampling box (15), and a stirring power device for driving each stirring shaft to rotate can be installed on the top of the sampling box (15).

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