Undisturbed soil sampling device for ecological geological survey

Abstract

According to the technical scheme, the undisturbed soil sampling device is characterized in that the undisturbed soil sampling device comprises a base, a sampling hole is formed in the top face of the base, a lifting frame is fixedly installed on the top face of the base, a mounting table is arranged in the lifting frame, and a rubber pad is fixedly bonded to the top face of the mounting table; a driving motor is fixedly mounted on the top surface of the mounting table; the stratified sampling assembly is arranged in the sampling barrel and used for storing soil samples of different depths, by arranging a first sampling disc, when the sampling barrel goes deep into soil and collects the soil samples through a sampling opening, a micro driving motor is started, a shaft of the micro driving motor drives a lead screw to rotate, and a lifting sleeve drives the first sampling disc to move in the axial direction of the lead screw; therefore, the first sampling disc moves to synchronously drive the second sampling disc and the third sampling disc to move along the lead screw, mixing of soil samples with different depths is avoided, and an accurate sample foundation is provided for subsequent layered measurement of volume weight, water content, conductivity and other parameters.

Description

Technical Field

[0001] This invention relates to the field of soil sampling technology, specifically to an undisturbed soil sampling device for ecological geological surveys. Background Technology

[0002] In ecological geological surveys, collecting undisturbed soil samples from weathering zones, vadose zones, parent materials, and soil, and measuring parameters such as bulk density, water content, and electrical conductivity of these undisturbed soil samples, is one of the important means to analyze local geomorphological changes in detail.

[0003] For example, Chinese Patent Publication No. CN217424781U discloses a soil sampling device for ecological and environmental geological exploration, including a frame. Two sets of electric telescopic rods and two sets of T-shaped guide rods are fixedly installed on the top surface of the frame. A lifting plate is slidably fitted onto the side walls of the two sets of T-shaped guide rods. One end of each set of electric telescopic rods is fixedly connected to the upper part of the lifting plate. A through hole and a threaded pipe are provided on the upper part of the lifting plate. A sampling cylinder is installed on the lower part of the lifting plate, and a fixed through hole is opened on the upper part of the sampling cylinder. A pusher plate is provided inside the sampling cylinder, and a bolt is fixedly installed on the upper part of the pusher plate. One end of the bolt passes through the through hole, the threaded pipe, and the fixed through hole. A pre-alignment ring is fitted onto the side wall of the sampling cylinder. This invention uses a pre-alignment ring, which eliminates the need for repeated up-and-down movement of the sampling cylinder to complete the pre-alignment work, thus improving the sampling efficiency of the soil sampling device for ecological and environmental geological exploration.

[0004] Currently, there are still some shortcomings in the soil sampling device for ecological and environmental geological exploration. For example, when storing soil samples at different depths separately, there is a lack of an effective layered isolation structure, which makes it easy for soil samples at different depths to mix in the sampling tube. The upper soil may sink due to gravity or vibration during sampling and mix with the lower soil, affecting the accuracy of subsequent measurements of parameters such as bulk density, water content, and electrical conductivity. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an undisturbed soil sampling device for ecological geological surveys, which solves the problems mentioned in the background art.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: An undisturbed soil sampling device for ecological geological surveys includes: a base with a sampling hole on its top surface; a lifting frame fixedly installed on the top surface of the base; an installation platform inside the lifting frame; a rubber pad fixedly adhered to the top surface of the installation platform; a drive motor fixedly installed on the top surface of the installation platform; a sampling frame on the bottom surface of the installation platform; a connection hole on the top surface of the installation platform; a drill bit fixedly installed on the bottom surface of the sampling frame; a sampling cylinder inside the sampling frame; and a sampling port on the outer circular wall of the sampling cylinder; and a layered sampling component disposed inside the sampling cylinder for storing soil samples at different depths.

[0007] By adopting the above technical solution, and by setting the drill bit, the base is first fixed in the sampling area, and the sampling hole is aligned with the sampling point to ensure the overall stability of the device. After the lifting frame is started, it drives the installation platform to descend vertically, and the sampling frame on the bottom of the installation platform moves down accordingly. At this time, the drive motor transmits power to the sampling frame through the connection hole, driving the drill bit at the bottom of the sampling frame to rotate at high speed, which facilitates the drill bit to quickly drill into the soil. As the sampling frame continues to penetrate deeper, the soil enters the sampling tube through the sampling port on the outer circular wall of the sampling tube, realizing the collection of undisturbed soil samples. The rubber pad on the top of the installation platform can reduce vibration during the operation of the device and ensure the stability of the sampling process. There is no need for manual force to press down, which reduces the operation intensity. Moreover, the high-speed rotation of the drill bit can quickly break through different soil layers and shorten the sampling time.

[0008] Preferably, the stratified sampling assembly includes: a first sampling disk disposed inside a sampling cylinder; a micro drive motor fixedly installed on the bottom surface of the sampling cylinder; a lead screw fixedly connected to the shaft of the micro drive motor; a second sampling disk and a third sampling disk movably sleeved on the outside of the lead screw; through holes opened on the top surfaces of the second and third sampling disks; a lifting sleeve threadedly connected to the top end of the lead screw; the lifting sleeve fixedly connected to the first sampling disk; and two connecting rods fixedly installed between the first, second, and third sampling disks.

[0009] By adopting the above technical solution, and by setting up a first sampling plate, when the sampling tube penetrates deep into the soil and collects soil samples through the sampling port, the micro drive motor starts, and its shaft drives the lead screw to rotate. The rotation of the lead screw causes the lifting sleeve to move the first sampling plate along the lead screw axis. Therefore, the movement of the first sampling plate will synchronously drive the second and third sampling plates to move together along the lead screw, so that the soil samples collected later fall into the second sampling plate. When sampling continues to go deeper, the micro drive motor is started again, so that the second sampling plate rises above the sampling port, allowing the soil sample to fall onto the third sampling plate. This allows for the targeted collection of undisturbed soil samples from different depths, such as weathering zone, vadose zone, parent material, and soil, avoiding the mixing of soil samples from different depths. This provides an accurate sample basis for subsequent stratified measurements of parameters such as bulk density, water content, and electrical conductivity.

[0010] Preferably, the bottom surface of the sampling tube is provided with a groove, the top surface of the groove is fixedly attached to a first magnetic block, and the bottom surface of the sampling frame is provided with a second magnetic block, and the first magnetic block and the second magnetic block are attracted to each other.

[0011] By adopting the above technical solution, and by setting a first magnetic block, during the assembly stage of the sampling device, the sampling tube is placed inside the sampling frame, so that the groove on the bottom surface of the sampling tube is aligned with the second magnetic block on the bottom surface of the sampling frame. The first magnetic block and the second magnetic block attract each other, and under the action of magnetic force, the sampling tube will be firmly fixed inside the sampling frame, realizing the rapid connection between the sampling tube and the sampling frame, saving preparation and finishing time before and after sampling, and improving the overall sampling efficiency.

[0012] Preferably, a pull block is fixedly installed on the outer circular wall surface of the sampling tube.

[0013] By adopting the above technical solution and setting a pull block, when it is necessary to remove the sampling tube from the sampling frame, the pull block on the outside of the sampling tube provides a convenient point of force application. The operator can directly hold the pull block and transmit the pulling force through the pull block, which can more easily overcome the attraction between the first magnetic block and the second magnetic block, and avoid the disassembly difficulties caused by the smooth surface of the sampling tube making it difficult to apply force.

[0014] Preferably, a ball screw is provided on one side of the lifting frame, and connecting blocks are provided on both sides of the lifting frame. The ball screw is threadedly connected to the connecting blocks, and the connecting blocks are fixedly connected to the mounting platform.

[0015] By adopting the above technical solution and setting a ball screw, when the ball screw rotates, it can drive the connecting block to move smoothly along the axial direction through the thread transmission. The connecting block is fixedly connected to the mounting platform, thereby driving the mounting platform to move up and down precisely, which facilitates the collection of soil samples at a specific depth.

[0016] Preferably, a guide rod is provided on the other side of the lifting frame, and the guide rod is movably sleeved together with the connecting block.

[0017] By adopting the above technical solution and setting a guide rod, the guide rod provides axial guidance for the connecting block, which can effectively limit the horizontal offset or rotation of the connecting block.

[0018] Preferably, positioning blocks are fixedly installed on both sides of the base, and the internal threads of the positioning blocks are connected to insert rods, with insert cones fixedly installed on the bottom surface of the insert rods.

[0019] By adopting the above technical solution, and by setting up the insertion cone, before sampling, the insertion rod is rotated so that it moves downward under the action of the thread of the positioning block, which drives the insertion cone on the bottom surface to insert into the soil. This helps the insertion cone to interlock with the soil, which can firmly fix the base at the sampling point and effectively prevent the device from shifting or tilting due to soil reaction force, vibration or external collision during the sampling process.

[0020] Preferably, the top surface of the sampling cylinder is threaded with a cover plate.

[0021] By adopting the above technical solution and setting a cover plate, it is convenient to collect soil samples from the sampling tube after the sampling tube is taken out of the sampling frame and the cover plate is unscrewed off the sampling tube.

[0022] In summary, the present invention has the following main beneficial effects: By setting up a first sampling plate, when the sampling tube penetrates deep into the soil and collects soil samples through the sampling port, the micro drive motor starts, and its shaft drives the lead screw to rotate. The rotation of the lead screw causes the lifting sleeve to move the first sampling plate along the lead screw axis. Therefore, the movement of the first sampling plate will synchronously drive the second and third sampling plates to move together along the lead screw, so that the soil samples collected later fall into the second sampling plate. When sampling continues to go deeper, the micro drive motor is started again, so that the second sampling plate rises above the sampling port, allowing the soil sample to fall onto the third sampling plate. This allows for the targeted collection of undisturbed soil samples from different depths, such as the weathering zone, vadose zone, parent material, and soil, avoiding the mixing of soil samples from different depths. This provides an accurate sample basis for subsequent stratified measurements of parameters such as bulk density, water content, and electrical conductivity.

[0023] By setting a first magnetic block, during the assembly stage of the sampling device, the sampling tube is placed inside the sampling frame, and the groove on the bottom surface of the sampling tube is aligned with the second magnetic block on the bottom surface of the sampling frame. The first and second magnetic blocks attract each other, and under the action of magnetic force, the sampling tube is firmly fixed inside the sampling frame, realizing a quick connection between the sampling tube and the sampling frame. This saves preparation and finishing time before and after sampling and improves the overall sampling efficiency. By setting a pull block, when it is necessary to remove the sampling tube from the sampling frame, the pull block on the outside of the sampling tube provides a convenient point of force application. The operator can directly hold the pull block and transmit the pulling force through the pull block, which more easily overcomes the attraction between the first and second magnetic blocks and avoids the disassembly difficulties caused by the smooth surface of the sampling tube making it difficult to apply force. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the mounting platform structure of the present invention; Figure 3 This is a schematic diagram of the sampling frame structure of the present invention; Figure 4This is a schematic diagram of the pull block structure of the present invention; Figure 5 This is a schematic diagram of the planar structure of the sampling cylinder of the present invention; Figure 6 This is a schematic diagram of the positioning block structure of the present invention.

[0025] Reference numerals: 1. Base; 2. Sampling hole; 3. Lifting frame; 4. Mounting platform; 5. Drive motor; 6. Sampling rack; 7. Connecting hole; 8. Drill bit; 9. Sampling cylinder; 10. Sampling port; 11. First sampling plate; 12. Second sampling plate; 13. Third sampling plate; 14. Miniature drive motor; 15. Lead screw; 16. Through hole; 17. Lifting sleeve; 18. Connecting rod; 19. Groove; 20. First magnetic block; 21. Second magnetic block; 22. Pull block; 23. Ball screw; 24. Guide rod; 25. Connecting block; 26. Positioning block; 27. Insert rod; 28. Insert cone; 29. ​​Cover plate; 30. Rubber pad. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] refer to Figures 1-6 An undisturbed soil sampling device for ecological geological surveys includes: a base 1, a sampling hole 2 on the top surface of the base 1, a lifting frame 3 fixedly installed on the top surface of the base 1, an installation platform 4 inside the lifting frame 3, a rubber pad 30 fixedly adhered to the top surface of the installation platform 4, a drive motor 5 fixedly installed on the top surface of the installation platform 4, a sampling frame 6 on the bottom surface of the installation platform 4, a connection hole 7 on the top surface of the installation platform 4, a drill bit 8 fixedly installed on the bottom surface of the sampling frame 6, a sampling cylinder 9 inside the sampling frame 6, and a sampling port 10 on the outer circular wall of the sampling cylinder 9; and a layered sampling component, which is installed inside the sampling cylinder 9 for storing soil samples at different depths.

[0028] By setting the drill bit 8, the base 1 is first fixed in the sampling area, and the sampling hole 2 is aligned with the sampling point to ensure the overall stability of the device. After the lifting frame 3 is started, it drives the mounting platform 4 to descend vertically. The sampling frame 6 on the bottom of the mounting platform 4 moves down accordingly. At this time, the drive motor 5 transmits power to the sampling frame 6 through the connecting hole 7, driving the drill bit 8 at the bottom of the sampling frame 6 to rotate at high speed, so that the drill bit 8 can quickly drill into the soil. As the sampling frame 6 continues to go deeper, the soil enters the sampling tube 9 through the sampling port 10 on the outer circular wall of the sampling tube 9, realizing the collection of undisturbed soil samples. The rubber pad 30 on the top surface of the mounting platform 4 can reduce vibration during the operation of the device and ensure the stability of the sampling process. There is no need for manual force to press down, which reduces the intensity of operation. Moreover, the high-speed rotation of the drill bit 8 can quickly break through different soil layers and shorten the sampling time.

[0029] As a further embodiment of the present invention, the layered sampling assembly includes: a first sampling disk 11, which is disposed inside the sampling cylinder 9. A micro drive motor 14 is fixedly installed on the bottom surface of the sampling cylinder 9. A lead screw 15 is fixedly connected to the shaft of the micro drive motor 14. A second sampling disk 12 and a third sampling disk 13 are movably sleeved on the outside of the lead screw 15. A through hole 16 is opened on the top surface of the second sampling disk 12 and the third sampling disk 13. A lifting sleeve 17 is threadedly connected to the top end of the lead screw 15. The lifting sleeve 17 is fixedly connected to the first sampling disk 11. Two connecting rods 18 are fixedly installed between the first sampling disk 11, the second sampling disk 12 and the third sampling disk 13. By setting up the first sampling plate 11, when the sampling tube 9 penetrates deep into the soil and collects soil samples through the sampling port 10, the micro drive motor 14 starts, and its shaft drives the lead screw 15 to rotate. The rotation of the lead screw 15 will cause the lifting sleeve 17 to move the first sampling plate 11 along the axial direction of the lead screw 15. Therefore, the movement of the first sampling plate 11 will synchronously drive the second sampling plate 12 and the third sampling plate 13 to move together along the lead screw 15, so that the soil samples collected later fall into the second sampling plate 12. When sampling continues to go deeper, the micro drive motor 14 is started again, so that the second sampling plate 12 rises above the sampling port 10, so that the soil samples can fall onto the third sampling plate 13. This allows for the targeted collection of undisturbed soil samples from different depths, such as the weathering zone, vadose zone, parent material, and soil, avoiding the mixing of soil samples from different depths. This provides an accurate sample basis for subsequent stratified measurements of parameters such as bulk density, water content, and electrical conductivity.

[0030] As a further embodiment of the present invention, a groove 19 is provided on the bottom surface of the sampling cylinder 9, a first magnetic block 20 is fixedly attached to the top surface inside the groove 19, and a second magnetic block 21 is provided on the bottom surface inside the sampling frame 6, and the first magnetic block 20 and the second magnetic block 21 are attracted to each other. By setting the first magnetic block 20, during the assembly stage of the sampling device, the sampling tube 9 is placed inside the sampling frame 6, so that the groove 19 on the bottom surface of the sampling tube 9 is aligned with the second magnetic block 21 on the bottom surface inside the sampling frame 6. The first magnetic block 20 and the second magnetic block 21 attract each other. Under the action of magnetic force, the sampling tube 9 will be firmly fixed inside the sampling frame 6, realizing the rapid connection between the sampling tube 9 and the sampling frame 6, saving the preparation and finishing time before and after sampling, and improving the overall sampling efficiency.

[0031] As a further embodiment of the present invention, a pull block 22 is fixedly installed on the outer circular wall surface of the sampling cylinder 9; By setting the pull block 22, when it is necessary to remove the sampling cylinder 9 from the sampling frame 6, the pull block 22 on the outside of the sampling cylinder 9 provides a convenient point of force application. The operator can directly hold the pull block 22 and transmit the pulling force through the pull block 22, which can more easily overcome the attraction between the first magnetic block 20 and the second magnetic block 21, and avoid the difficulty of disassembly caused by the smooth surface of the sampling cylinder 9 making it difficult to apply force.

[0032] As a further embodiment of the present invention, a ball screw 23 is provided on one side of the lifting frame 3, and a connecting block 25 is provided on both sides of the lifting frame 3. The ball screw 23 is threadedly connected to the connecting block 25, and the connecting block 25 is fixedly connected to the mounting platform 4. By setting a ball screw 23, when the ball screw 23 rotates, it can drive the connecting block 25 to move smoothly along the axial direction through the thread transmission. The connecting block 25 is fixedly connected to the mounting platform 4, thereby driving the mounting platform 4 to rise and fall precisely, which facilitates the collection of soil samples at a specific depth.

[0033] As a further embodiment of the present invention, a guide rod 24 is provided on the other side of the lifting frame 3, and the guide rod 24 is movably sleeved together with the connecting block 25; By setting the guide rod 24, the guide rod 24 provides axial guidance for the connecting block 25, which can effectively limit the horizontal offset or rotation of the connecting block 25.

[0034] As a further embodiment of the present invention, positioning blocks 26 are fixedly installed on both sides of the base 1, and the internal threads of the positioning blocks 26 are connected to the insertion rods 27, and the bottom surfaces of the insertion rods 27 are fixedly installed with the insertion cones 28. By setting the insertion cone 28, before sampling, the insertion rod 27 is rotated to move downward under the action of the thread of the positioning block 26, which drives the insertion cone 28 on the bottom surface to be inserted into the soil. This helps the insertion cone 28 to interlock with the soil, which can firmly fix the base 1 at the sampling point and effectively prevent the device from being displaced or tilted due to soil reaction force, vibration or external collision during the sampling process.

[0035] As a further embodiment of the present invention, a cover plate 29 is threadedly connected to the top surface of the sampling cylinder 9; By setting the cover plate 29, the soil sample inside the sampling tube 9 can be easily collected after the sampling tube 9 is taken out of the sampling frame 6 and the cover plate 29 is unscrewed from the sampling tube 9.

[0036] Working principle: Please refer to Figures 1-6 As shown, the device is first fixed by placing the base 1 in the sampling area and aligning the sampling hole 2 with the target sampling point. By rotating the insertion rod 27 inside the positioning blocks 26 on both sides of the base 1, the insertion cone 28 on the bottom surface of the insertion rod 27 moves downward and inserts into the soil under the action of the thread. With the interlocking action of the insertion cone 28 and the soil, the base 1 is firmly fixed to prevent the device from shifting or tilting during the sampling process. As the soil enters the sampling cylinder 9, the stratified sampling component starts to work. The micro drive motor 14 on the bottom surface inside the sampling cylinder 9 starts, and its shaft drives the lead screw 15 to rotate. The lifting sleeve 17 threaded at the top of the lead screw 15 then drives the first sampling disc 11 to move along the axial direction of the lead screw 15. Since the first sampling disc 11, the second sampling disc 12 and the third sampling disc 13 are fixedly connected by two connecting rods 18, the second sampling disc 12 and the third sampling disc 13 also move synchronously. By controlling the micro drive motor 14, the positions of the three sampling discs are adjusted so that subsequent soil samples fall sequentially onto the second sampling disc 12 and the third sampling disc 13, achieving separate storage of soil samples at different depths. This allows for targeted collection of undisturbed soil samples from different layers, such as the weathering zone and vadose zone. During sampling, the sampling cylinder 9 is attracted to the second magnetic block 21 on the bottom surface of the sampling frame 6 via the first magnetic block 20 in the bottom groove 19, and is securely installed inside the sampling frame 6. When the sampling reaches the preset depth, the lifting frame 3 raises the mounting platform 4 and the sampling frame 6 to complete the sampling. The operator holds the pull block 22 on the outer circular wall of the sampling cylinder 9, applying pulling force to overcome the attraction between the first magnetic block 20 and the second magnetic block 21, and removes the sampling cylinder 9 from the sampling frame 6. If soil sample collection is required, the threaded cover plate 29 on the top surface of the sampling cylinder 9 can be unscrewed to remove the layered soil sample.

[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A soil sampling device for ecological geological surveys, characterized in that, include: A base (1) has a sampling hole (2) on its top surface. A lifting frame (3) is fixedly installed on the top surface of the base (1). An installation platform (4) is provided inside the lifting frame (3). A rubber pad (30) is fixedly attached to the top surface of the installation platform (4). A drive motor (5) is fixedly installed on the top surface of the installation platform (4). A sampling frame (6) is provided on the bottom surface of the installation platform (4). A connection hole (7) is provided on the top surface of the installation platform (4). A drill bit (8) is fixedly installed on the bottom surface of the sampling frame (6). A sampling cylinder (9) is provided inside the sampling frame (6). A sampling port (10) is provided on the outer circular wall of the sampling cylinder (9). A stratified sampling component is disposed inside the sampling tube (9) for storing soil samples at different depths.

2. The undisturbed soil sampling device for ecological geological surveys according to claim 1, characterized in that, The stratified sampling component includes: The first sampling plate (11) is located inside the sampling cylinder (9). A micro drive motor (14) is fixedly installed on the bottom surface of the sampling cylinder (9). A lead screw (15) is fixedly connected to the shaft of the micro drive motor (14). A second sampling plate (12) and a third sampling plate (13) are movably sleeved on the outside of the lead screw (15). A through hole (16) is opened on the top surface of the second sampling plate (12) and the third sampling plate (13). A lifting sleeve (17) is threadedly connected to the top end of the lead screw (15). The lifting sleeve (17) is fixedly connected to the first sampling plate (11). Two connecting rods (18) are fixedly installed between the first sampling plate (11), the second sampling plate (12) and the third sampling plate (13).

3. The undisturbed soil sampling device for ecological geological surveys according to claim 1, characterized in that, The bottom surface of the sampling tube (9) is provided with a groove (19), and a first magnetic block (20) is fixedly attached to the top surface of the groove (19). A second magnetic block (21) is provided on the bottom surface of the sampling frame (6). The first magnetic block (20) and the second magnetic block (21) are attracted to each other.

4. The undisturbed soil sampling device for ecological geological surveys according to claim 3, characterized in that, A pull block (22) is fixedly installed on the outer circular wall of the sampling tube (9).

5. The undisturbed soil sampling device for ecological geological surveys according to claim 1, characterized in that, A ball screw (23) is provided on one side of the lifting frame (3), and a connecting block (25) is provided on both sides of the lifting frame (3). The ball screw (23) and the connecting block (25) are threaded together, and the connecting block (25) is fixedly connected to the mounting platform (4).

6. The undisturbed soil sampling device for ecological geological surveys according to claim 5, characterized in that, A guide rod (24) is provided on the other side of the lifting frame (3), and the guide rod (24) is movably sleeved together with the connecting block (25).

7. The undisturbed soil sampling device for ecological geological surveys according to claim 1, characterized in that, Positioning blocks (26) are fixedly installed on both sides of the base (1). The internal thread of the positioning block (26) is connected to the insertion rod (27), and the bottom surface of the insertion rod (27) is fixedly installed with the insertion cone (28).

8. The undisturbed soil sampling device for ecological geological surveys according to claim 1, characterized in that, The top surface of the sampling tube (9) is threaded with a cover plate (29).

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