Portable field soil sampling device

Abstract

The invention discloses a portable field soil sampling device, which relates to the technical field of sampling devices, and comprises an outer sleeve, a motor and an outer shell arranged at the top of the outer sleeve, and a drill bit movably connected with the output ends of the motor and the outer shell, the linkage sampling mechanism is connected with one end of the outer sleeve and used for triggering other structures through friction force when the equipment is taken out, and the soil filling sampling mechanism is connected with the bottom of the linkage sampling mechanism and used for filling and leveling up a soil mining hole and taking out a proper amount of soil with different depths after the linkage sampling mechanism is triggered. The invention provides a portable field soil sampling device. The portable field soil sampling device is provided with a linkage sampling mechanism and a soil filling sampling mechanism, through cooperative arrangement of the linkage sampling mechanism and the soil filling sampling mechanism, the problem that holes need to be filled and leveled up manually after traditional soil sampling is solved, so that secondary disturbance of manual backfilling to a soil structure is reduced, and the convenience and efficiency of field operation are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sampling devices, in particular to a portable field soil sampling device. BACKGROUND

[0002] A portable field soil sampling device is a portable device designed specifically for collecting soil samples in field environments such as farmland, forest, mountain, mining area, wetland, etc. Representative samples are efficiently obtained from different depths and locations of the soil for subsequent analysis of physical, chemical, biological, and other indicators in the laboratory, while minimizing disturbance to the natural environment.

[0003] For example, CN118408776A discloses a soil sampling device for geological exploration, which relates to the technical field of sampling devices. The soil sampling device for geological exploration includes a sampling cylinder, a handle, and two support rods. The handle is slidably installed on the two support rods. A height adjustment part is used to adjust the height of the sampling cylinder and the handle. The height adjustment part includes a pressing adjustment structure installed on the two support rods. The lower ends of the two support rods are fixedly connected to a circular block. A plurality of arc-shaped blocks are fixedly installed on the outer edge of the circular block. The advantages of this invention are that it can save time and labor required for soil sampling by converting gravity, and it can adjust the height of the sampling device to adapt to different geological conditions while maintaining the overall stability of the sampling device. It can also increase the stability and adaptability of the device during use and improve the practicality of the device.

[0004] Existing soil sampling techniques have developed a variety of devices to adapt to different scenarios, which can be divided into two categories: one is manual sampling equipment that relies on human power, which is lightweight and easy to carry; the other is automatic sampling equipment driven by motors and other power sources, which is more efficient and can handle hard soil and geological conditions with gravel. The core process of both is to drill a hole on the ground with a diameter comparable to the sampling component and obtain soil samples from different layers.

[0005] However, these two types of equipment also have some problems. On the one hand, in the field of soil detection, soil is a complex and heterogeneous system. The same depth of soil may have differences in fertility, pollutant distribution, and other aspects. To obtain representative data, multiple-point, layered sampling is usually required in the same area. In laboratory testing, only a small amount (a few grams to a few dozen grams) is needed for analysis, but the existing equipment often exceeds the actual laboratory demand, resulting in a large amount of excess samples and increasing the subsequent processing cost and burden. On the other hand, after sampling is completed, if the hole left on the ground is not backfilled in time, it will damage the soil structure and affect the environment.

[0006] When sampling in wet meadow, the soil is in a saturated water state, and the inter-particle binding force is weak. After the traditional sampling device collects the sample, due to the lack of effective sealing and anti-falling structure, part of the soil sample is easy to overflow and scatter from the sampling port during lifting, resulting in insufficient amount of effective sample actually obtained, which cannot meet the subsequent detection and analysis requirements.

[0007] In addition, in the traditional sampling, a large number of gravel particles are mixed in the collected sample, the binding force between the soil and the gravel is weak, and part of the soil sample will fall off and scatter with the gravel particles during the lifting of the sampling device, resulting in a decrease in the amount of effective soil sample actually obtained, which cannot meet the minimum amount requirement of subsequent detection and analysis. In order to meet the drilling requirements in complex geological environments containing gravel, the electric sampling device needs to be equipped with a driving motor with sufficient power, a transmission mechanism and a power supply module (such as a lithium battery pack). The addition of the above components will inevitably increase the overall weight of the device. The user needs to carry a relatively heavy device to sample in the mountains and forests, which will increase the additional burden. If the battery capacity or motor power of the electric device is reduced in pursuit of portability, although the weight of the equipment can be reduced, the driving power will be insufficient (the gravel layer cannot be effectively broken through), the endurance time will be shortened (only a small amount of sample collection can be completed after a single charging), and the large-scale and long-time sampling operation requirements in the field cannot be met.

[0008] At present, this work is generally completed by manual work, which not only has low efficiency and increases additional labor intensity, but also the artificial backfilling may be difficult to restore the original sequence of the soil, causing unavoidable secondary disturbance to the research area and affecting the long-term reliability of the data.

[0009] In view of the above problems, it is urgent to make innovative design on the basis of the original portable field soil sampling device. SUMMARY

[0010] The technical scheme of the present application provides a significantly different solution from the prior art, and specifically aims to provide a portable field soil sampling device to solve the problems of manual backfilling of the hole after sampling, complicated operation, secondary disturbance to the soil structure, excessive sampling amount for each sampling, which far exceeds the laboratory analysis requirement, increased subsequent processing cost, sample falling off in gravel area and wet meadow area, and the problem of not being able to meet the portability and sampling efficiency at the same time.

[0011] In order to achieve the above object, the application provides the following technical scheme: a portable field soil sampling device, comprising an external sleeve, a motor arranged at the top of the external sleeve, an external housing, a drill bit movably connected with the output end of the motor and the external housing, a linkage sampling mechanism connected with one end of the external sleeve and used for triggering the remaining structure by friction when the device is taken out, and a filling sampling mechanism connected with the bottom of the linkage sampling mechanism and used for filling the hole after the linkage sampling mechanism is triggered and taking out the appropriate amount of soil at different depths. The linkage sampling mechanism comprises a top connecting shell connected with one end of the external sleeve, a bottom connecting shell connected with the bottom of the top connecting shell, and a friction plate movably arranged between the top connecting shell and the bottom connecting shell. The filling sampling mechanism comprises a sampler movably arranged at the bottom of the bottom connecting shell, and a top rod connected with one side of the outer wall of the sampler.

[0012] Preferably, an internal top plate is connected with one side of the outer wall of the friction plate, a sliding plate is arranged at the bottom of the outer wall of the friction plate, and a compression spring is arranged around the top of the outer wall of the bottom connecting shell.

[0013] Preferably, a telescopic rod is arranged at the bottom of the top rod, and a return spring is arranged around the outer wall of the telescopic rod.

[0014] Preferably, a sliding groove is arranged on the outer wall of the bottom connecting shell, and the diameter of the sliding groove is matched with the diameter of the sliding plate.

[0015] Preferably, a cavity is arranged at the bottom of the outer wall of the bottom connecting shell, and the sampler is movably arranged in the cavity of the bottom connecting shell.

[0016] Preferably, openings are formed between the top connecting shell and the bottom connecting shell, and the friction plate is movably arranged in the openings.

[0017] Preferably, the three-dimensional view of the sampler is semicircular, and the inner wall of the sampler is hollow.

[0018] Preferably, the other side of the outer wall of the friction plate is a straight surface, and uneven protrusions are arranged on the other side of the outer wall of the friction plate.

[0019] Preferably, one end of the internal top plate is inclined, and one end of the top rod is circular.

[0020] Preferably, the samplers are symmetrically distributed in the cavities at the bottom of the outer wall of the bottom connecting shell, and the outer wall of the sampler is inclined.

[0021] Compared with the prior art, the application has the following beneficial effects: 1.The present application solves the problem of manual hole filling after traditional soil sampling by the coordinated arrangement of the linkage sampling mechanism and the soil filling sampling mechanism. When the device is pulled out of the soil, the friction between the friction plate in the linkage sampling mechanism and the inner wall of the hole triggers the linkage mechanism, which drives the sampler of the soil filling sampling mechanism to adhere to the inner wall of the hole to take the soil. At the same time, the symmetrical semicircular structure of the sampler forms a reasonable gap, allowing excess soil beyond the detection requirement to naturally fall to the bottom of the hole through the gap. As the outer sleeve continues to move upward, the fallen soil gradually accumulates at the bottom of the hole during the pulling process, finally achieving automatic filling of the hole. This replaces the inefficient and highly disturbing manual backfilling, not only saving the trouble of carrying special backfilling tools, but also avoiding the secondary damage to the soil structure caused by manual tamping, and eliminating the surface damage and soil erosion caused by manual backfilling. In addition, in areas with dense gravel, the collected soil samples may be mixed with a large amount of gravel, which can easily fall off during the sampling operation. The sampler 301 can be quickly filled due to its small volume, and the "automatic sealing" feature of the sampler can store the removed sample immediately to ensure the stability of the sampling.

[0022] 2.The present application effectively solves the problem of excessive soil treatment pressure caused by excessive soil sampling in traditional sampling by precise and limited design of the soil filling sampling mechanism. The semicircular hollow structure of the sampler ensures that the amount of soil collected in a single sampling is controlled within the range required for laboratory detection (a few grams to a few tens of grams). The inclined design of the outer wall and the symmetrical gap cooperate to allow excess soil beyond the volume to flow back to the hole through the gap under the action of the internal top plate pressing the top rod in the linkage sampling mechanism, thus controlling the amount of soil taken from the source. This design avoids the large amount of sample redundancy caused by traditional equipment in obtaining a complete soil column. It not only greatly reduces the burden of sample storage and transportation during field sampling, but also reduces the workload of sorting and discarding excess soil during laboratory pre-treatment, ensuring detection requirements and reducing the potential environmental impact of excess soil treatment, improving the economy and environmental friendliness of the entire sampling process. Due to the "automatic sealing" feature of the sampler 301, it can greatly improve the success rate of sampling in special areas such as gravel areas, wet meadows, and complex terrain. Moreover, due to the small size of the device, it can be carried by one person, providing portability and sampling efficiency while ensuring the integrity of the sample structure. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0024] Figure 2 It is a cross-sectional view of the internal structure of the present application.

[0025] Figure 3 It is the schematic diagram of the external structure of the linkage sampling mechanism and the filling soil sampling mechanism of the application.

[0026] Figure 4 It is the schematic diagram of the overall structure of the linkage sampling mechanism and the filling soil sampling mechanism of the application.

[0027] Figure 5 It is the schematic diagram of the structure of the bottom connecting shell and the compressed spring of the application. Figure 6 It is the schematic diagram of the structure of the friction plate and the internal top plate of the application. Figure 7 It is the schematic diagram of the structure of the sampler, the top rod, the telescopic rod and the spring of the application. Figure 8 It is the schematic diagram of the split structure of the top connecting shell of the application. Figure 9 It is the schematic diagram of the overall structure of the linkage sampling mechanism and the filling soil sampling mechanism of the application. Figure 10 It is the schematic diagram of the overall structure of the linkage sampling mechanism and the filling soil sampling mechanism of the application. Figure 6 It is the schematic diagram of the local enlarged structure of the marked A.

[0028] In the figure: 1, external sleeve; 2, linkage sampling mechanism; 201, top connecting shell; 202, friction plate; 203, internal top plate; 204, sliding plate; 205, bottom connecting shell; 206, compressed spring; 3, filling soil sampling mechanism; 301, sampler; 302, top rod; 303, telescopic rod; 304, reset spring; 4, drill bit; 5, motor and external shell. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the application.

[0030] Please refer to Figures 1 to 10 The application provides a technical solution: a portable field soil sampling device, which comprises an external sleeve 1, a motor and an external shell 5 arranged at the top of the external sleeve 1, a drill bit 4 movably connected to the output end of the motor and the external shell 5, a linkage sampling mechanism 2 connected to one end of the external sleeve 1 and used for triggering the remaining structure by friction when the device is taken out, and a filling soil sampling mechanism 3 connected to the bottom of the linkage sampling mechanism 2 and used for filling the hole after the linkage sampling mechanism 2 is triggered and taking out the appropriate amount of soil at different depths. The linkage sampling mechanism 2 comprises a top connecting shell 201 connected with one end of the outer sleeve 1, a bottom connecting shell 205 connected with the bottom of the top connecting shell 201, and a friction plate 202 movably installed between the top connecting shell 201 and the bottom connecting shell 205. The backfill sampling mechanism 3 comprises a sampler 301 movably arranged at the bottom of the bottom connecting shell 205, and a top rod 302 connected with one side of the outer wall of the sampler 301.

[0031] As an embodiment, the linkage sampling mechanism 2 and the backfill sampling mechanism 3 are cooperatively arranged to solve the problem that the hole needs to be manually backfilled after traditional soil sampling. When the device is pulled out of the soil, the friction between the friction plate 202 in the linkage sampling mechanism 2 and the inner wall of the hole triggers the linkage mechanism, which drives the sampler 301 of the backfill sampling mechanism 3 to adhere to the inner wall of the hole to take the soil. At the same time, the symmetrical semicircular structure of the sampler 301 forms a reasonable gap, so that the excess soil beyond the detection requirement can naturally fall to the bottom of the hole through the gap. With the continuous upward movement of the outer sleeve 1, the fallen soil gradually accumulates at the bottom of the hole during the pulling process, and finally the hole is automatically backfilled. This design not only reduces the secondary disturbance of the soil structure caused by manual backfilling, but also saves the steps of carrying backfilling tools and manually tamping in the field, significantly reduces the operation strength, improves the convenience and efficiency of field operation, and avoids the problems of surface damage and soil erosion caused by manual backfilling not in time or not completely. During the field soil sampling process, manual sampling is easily restricted by complex environments and faces many difficulties: in the area with dense gravel, the collected soil samples will be mixed with a large amount of gravel, the texture is loose and uneven, and the samples will easily fall off and scatter during the sampling operation, resulting in sample loss. The sampler 301 can be quickly filled during sampling due to its small volume, and the “automatic sealing” feature of the sampler 301 can seal the removed samples in the first time to ensure the stability of sampling.

[0032] One side of the outer wall of the friction plate 202 is connected with an inner top plate 203, the bottom of the outer wall of the friction plate 202 is provided with a sliding plate 204, and the top of the outer wall of the bottom connecting shell 205 is surrounded by a compression spring 206.

[0033] In this embodiment, the present invention effectively solves the problem of excessive soil collection and handling pressure caused by the large amount of soil collected at one time in traditional sampling, through the precise and limited design of the soil sampling mechanism 3. The sampler 301 of the soil sampling mechanism 3 adopts a semi-circular hollow structure to ensure that the collected samples are representative. At the same time, the inclined design of the outer wall of the sampler 301, combined with the symmetrical gaps, allows excess soil exceeding the volume during the collection process to flow back to the pit in time through the gaps under the action of the internal top plate 203 squeezing the top rod 302 in the linkage sampling mechanism 2. This avoids the large amount of excess soil caused by the traditional equipment collecting a complete soil column, reducing the load on the sample storage container and transportation costs during field sampling. The workload of sorting and disposing of excess soil in laboratory pretreatment is reduced, ensuring testing needs are met while minimizing the potential environmental impact of excess soil disposal. This improves the economy and environmental friendliness of the entire sampling process. Due to the "automatic sealing" feature of the sampler 301, it significantly improves the sampling success rate in special areas such as gravel areas, wet meadows, and complex terrain. Moreover, its small size allows for portable transport and rapid deployment by a single person, improving the efficiency of multi-point sampling in the field and reducing labor costs. At the same time, the device has sufficient power to quickly overcome gravel resistance and sticky soil in wet meadows, shortening the time for a single sampling. It provides portability and sampling efficiency while ensuring the integrity of the sample structure.

[0034] A telescopic rod 303 is installed at the bottom of the top rod 302, and a return spring 304 is installed around the outer wall of the telescopic rod 303.

[0035] In this embodiment, when the friction plate 202 is reset, one end of the inner top plate 203 will detach from one end of the top rod 302, so that the top rod 302 will no longer exert pressure. Then, the telescopic rod 303 and the reset spring 304 will drive the sampler 301 to reset. After the device is removed, the user can hold the outer wall of the friction plate 202 and pull it downwards. The sampler 301 will then open automatically. The user can then take out the soil inside the sampler 301 to take a sample. The linkage sampling mechanism 2 and the soil filling sampling mechanism 3 are both distributed in multiple segments at equal intervals on the outer sleeve 1. In this way, soil from different layers can be collected when the device is removed (the telescopic rod 303 and the reset spring 304 are used to drive the sampler 301 to reset).

[0036] The outer wall of the bottom connecting shell 205 is provided with a sliding groove, and the diameter of the sliding groove of the bottom connecting shell 205 is adapted to the diameter of the sliding plate 204.

[0037] In this embodiment, the compression spring 206 is compressed to generate elastic force, but this elastic force is offset by the friction force generated between the friction plate 202 and the inner wall of the pit, thus achieving balance. Neither the elastic force nor the friction force disappears. When the friction plate 202 moves downward, the slide plate 204 also moves downward synchronously along the groove of the bottom connecting shell 205. When the inner top plate 203 moves downward, one end of it will press against the outer wall of the top rod 302 and squeeze it. Since one end of the inner top plate 203 and one end of the top rod 302 are not flat, one end of the inner top plate 203 will squeeze one end of the top rod 302, causing the top rod 302 to move to one side (the slide plate 204 can slide along the groove of the bottom connecting shell 205).

[0038] A cavity is provided at the bottom of the outer wall of the bottom connecting shell 205, and the sampler 301 is movably disposed in the cavity of the bottom connecting shell 205.

[0039] In this embodiment, one end of the internal top plate 203 and one end of the top rod 302 are both uneven. This causes one end of the internal top plate 203 to press against one end of the top rod 302, causing the top rod 302 to move to one side. When the top rod 302 moves, it will cause the symmetrically distributed samplers 301 to move slightly to both sides. At this time, one side of the outer wall of the sampler 301 will contact the inner wall of the pit and sink slightly (the sampler 301 is movable and embedded in the cavity of the bottom connecting shell 205, so that the flatness of the inner wall of the pit will not be affected when the equipment digs the hole, thus ensuring that the sampler 301 can collect soil later).

[0040] An opening is formed between the top connecting shell 201 and the bottom connecting shell 205, and the friction plate 202 is movably disposed in the opening between the top connecting shell 201 and the bottom connecting shell 205.

[0041] In this embodiment, since the pit is drilled by the drill bit 4, the diameter of the inner wall of the pit is the same as the diameter of the outer sleeve 1. When the outer sleeve 1 moves upward, the protrusion on the outer wall of the friction plate 202 will generate friction with the inner wall of the pit. This friction will drive the friction plate 202 to move downward. When the friction plate 202 moves downward, the inner top plate 203 will move downward synchronously. At this time, the compression spring 206 will be compressed to generate elastic force. However, this elastic force will be offset by the friction between the friction plate 202 and the inner wall of the pit to achieve balance. Neither the elastic force nor the friction force will disappear. When the friction plate 202 moves downward, the sliding plate 204 will also move downward synchronously along the sliding groove of the bottom connecting shell 205 (the friction plate 202 can move up and down in the openings formed between the top connecting shell 201 and the bottom connecting shell 205, thereby driving the other components to move).

[0042] The three-dimensional view of sampler 301 is semi-circular, and the inner wall of sampler 301 is hollow.

[0043] In this embodiment, as the outer sleeve 1 moves upward, the outer wall of the sampler 301 will pull out the soil from the inner wall of the pit, and the inner wall of the sampler 301 will hold a small portion of the soil, which can be used for testing. The excess soil will fall to the bottom of the pit through the gap created when the sampler 301 moves in the opposite direction. As the outer sleeve 1 moves, the soil at the bottom of the pit will gradually accumulate. When the device is completely pulled out, the pit will be filled (the inner wall of the sampler 301 can hold some soil, and since the sampler 301 will be re-embedded into the cavity of the bottom connecting shell 205 after the device is removed, the user can save the soil and take it to the test area).

[0044] The other side of the outer wall of the friction plate 202 is a straight surface, and uneven protrusions are provided on the other side of the outer wall of the friction plate 202.

[0045] In this embodiment, when the friction plate 202 is reset, one end of the inner top plate 203 will detach from one end of the top rod 302, so that the top rod 302 will no longer exert pressure. Then, the telescopic rod 303 and the reset spring 304 will drive the sampler 301 to reset. After the device is removed, the user can hold the outer wall of the friction plate 202 and pull it downwards. The sampler 301 will then open automatically. The user can then take out the soil inside the sampler 301 to perform sampling. (The uneven protrusions on the outer wall of the friction plate 202 are designed to increase the friction between it and the soil in the pit, thereby driving the other components inside the device to move.)

[0046] One end of the internal top plate 203 is inclined, and one end of the top rod 302 is round.

[0047] In this embodiment, since one end of the internal top plate 203 and one end of the top rod 302 are not flat, one end of the internal top plate 203 will press one end of the top rod 302, causing the top rod 302 to move to one side. When the top rod 302 moves, it will drive the symmetrically distributed samplers 301 to move slightly to both sides (the different shapes of one end of the internal top plate 203 and the top rod 302 are designed so that when the internal top plate 203 moves downward, it can press the top rod 302, causing it to move to one side).

[0048] The samplers 301 are symmetrically distributed in the cavity at the bottom of the outer wall of the bottom connecting shell 205, and the outer wall of the sampler 301 is inclined.

[0049] In this embodiment, the outer wall of the sampler 301 will scrape the soil from the inner wall of the pit, and the inner wall of the sampler 301 will hold a small portion of the soil, which can be used for testing. The excess soil will fall to the bottom of the pit through the gap created when the sampler 301 moves in opposite directions. As the outer sleeve 1 moves, the soil at the bottom of the pit will gradually accumulate. When the device is completely pulled out, the pit will be filled. (The reason why the outer wall of the sampler 301 is inclined is that when the device moves upward, the sampler 301 will expand outward, so that the outer wall of the sampler 301 can contact the soil on the inner wall of the hole, thereby allowing the soil to be scraped off.)

[0050] Working principle: When using this portable field soil sampling device, the user first needs to find the pre-marked position on the outer wall of the soil. Then, the user holds the motor and the outer housing 5 and starts it. After the motor and the outer housing 5 are started, the drill bit 4 will rotate. When the drill bit 4 is rotating, the user holds the motor and the outer housing 5 and presses down to dig downwards. After the device digs to the specified depth, a pit will be formed in the soil. Then, the user holds the motor and the outer housing 5 and pulls the device upwards to take it out. Secondly, when the motor and outer housing 5 move upward, the outer sleeve 1 also moves synchronously. As the outer sleeve 1 moves, since the pit is drilled by the drill bit 4, the diameter of the pit's inner wall is the same as the diameter of the outer sleeve 1. When the outer sleeve 1 moves upward, the protrusions on the outer wall of the friction plate 202 generate friction with the inner wall of the pit. This friction drives the friction plate 202 downward. As the friction plate 202 moves downward, the inner top plate 203 moves downward synchronously. At this time, the compression spring 206 is compressed, generating elastic force. However, this elastic force is offset by the friction between the friction plate 202 and the inner wall of the pit, achieving balance. The force and friction have not disappeared. When the friction plate 202 moves downward, the slide plate 204 will also move downward synchronously along the slide groove of the bottom connecting shell 205. When the internal top plate 203 moves downward, one end will stick to the outer wall of the top rod 302 and squeeze it. Since one end of the internal top plate 203 and one end of the top rod 302 are not flat, one end of the internal top plate 203 will squeeze one end of the top rod 302, causing the top rod 302 to move to one side. When the top rod 302 moves, it will drive the symmetrically distributed samplers 301 to move slightly to both sides. At this time, one side of the outer wall of the sampler 301 will contact the inner wall of the pit and sink in slightly. Finally, as the outer sleeve 1 moves upward, the outer wall of the sampler 301 will pull out the soil from the inner wall of the pit, and the inner wall of the sampler 301 will catch a small portion of the soil, which can be used for testing. Excess soil will fall to the bottom of the pit through the gaps created by the sampler 301 moving in the opposite direction. As the outer sleeve 1 moves, the soil at the bottom of the pit will gradually accumulate. When the device is completely pulled out, the pit will be filled. After the device is removed, since the friction plate 202 no longer has friction with the inner wall of the pit, the compressed spring 206 will release its elasticity, causing the friction plate 202 to reset. When plate 202 is reset, one end of the inner top plate 203 will detach from one end of the top rod 302, so that the top rod 302 will no longer exert pressure. Then, the telescopic rod 303 and the reset spring 304 will drive the sampler 301 to reset. After the device is removed, the user can hold the outer wall of the friction plate 202 and pull it downwards. The sampler 301 will then open automatically. The user can then take out the soil inside the sampler 301 to take a sample. The linkage sampling mechanism 2 and the soil filling sampling mechanism 3 are both distributed in multiple segments at equal intervals on the outer sleeve 1. In this way, soil from different layers can be collected when the device is removed. Thus, the work of this invention is completed.

[0051] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A portable field soil sampling device, comprising an outer sleeve (1), a motor and an outer housing (5) disposed on the top of the outer sleeve (1), and a drill bit (4) movably connected to the output end of the motor and the outer housing (5), characterized in that: It also includes a linkage sampling mechanism (2) that is connected to one end of the outer sleeve (1) and is used to trigger the other structures by friction when the equipment is taken out, and a soil filling sampling mechanism (3) that is connected to the bottom of the linkage sampling mechanism (2) and is used to fill the hole of soil mining and take out appropriate amounts of soil at different depths after the linkage sampling mechanism (2) is triggered. The linkage sampling mechanism (2) includes a top connecting shell (201) connected to one end of the outer sleeve (1), a bottom connecting shell (205) connected to the bottom of the top connecting shell (201), and a friction plate (202) movably installed between the top connecting shell (201) and the bottom connecting shell (205). The soil filling sampling mechanism (3) includes a sampler (301) movably disposed at the bottom of the bottom connecting shell (205), and a top rod (302) is connected to one side of the outer wall of the sampler (301).

2. The portable field soil sampling device according to claim 1, characterized in that: An inner top plate (203) is connected to one side of the outer wall of the friction plate (202), a sliding plate (204) is provided at the bottom of the outer wall of the friction plate (202), and a compression spring (206) is installed around the top of the outer wall of the bottom connecting shell (205).

3. The portable field soil sampling device according to claim 1, characterized in that: A telescopic rod (303) is installed at the bottom of the top rod (302), and a return spring (304) is installed around the outer wall of the telescopic rod (303).

4. A portable field soil sampling device according to claim 1, characterized in that: The outer wall of the bottom connecting shell (205) is provided with a sliding groove, and the diameter of the sliding groove of the bottom connecting shell (205) is adapted to the diameter of the sliding plate (204).

5. A portable field soil sampling device according to claim 1, characterized in that: The bottom of the outer wall of the bottom connecting shell (205) is provided with a cavity, and the sampler (301) is movably disposed in the cavity of the bottom connecting shell (205).

6. A portable field soil sampling device according to claim 1, characterized in that: An opening is formed between the top connecting shell (201) and the bottom connecting shell (205), and the friction plate (202) is movably disposed in the opening between the top connecting shell (201) and the bottom connecting shell (205).

7. A portable field soil sampling device according to claim 1, characterized in that: The sampler (301) has a semi-circular three-dimensional view and its inner wall is hollow.

8. A portable field soil sampling device according to claim 1, characterized in that: The other side of the outer wall of the friction plate (202) is a straight surface, and uneven protrusions are provided on the other side of the outer wall of the friction plate (202).

9. A portable field soil sampling device according to claim 2, characterized in that: One end of the internal top plate (203) is inclined, and one end of the top rod (302) is round.

10. A portable field soil sampling device according to claim 1, characterized in that: The samplers (301) are symmetrically distributed in the cavity at the bottom of the outer wall of the bottom connecting shell (205), and the outer wall of the sampler (301) is inclined.

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