A sample collection device and a sample collection method for land exploration

Abstract

The present invention discloses a sample collection device and method for land exploration, which belongs to the technical field of land exploration. The present invention includes a support base; and further includes: a fixed rod, fixedly installed on the upper surface of the support base, a support top seat is fixedly installed on the upper end of the fixed rod, and a movable seat is installed on the outer side of the fixed rod for lifting; two fixed cylinders, symmetrically fixedly installed on the upper end surface of the sampling drill tube, a movable plate is installed on the inner side of the fixed cylinder for lifting, and two first steel ropes are symmetrically connected between the two movable plates; a guide cylinder, evenly fixedly installed on the upper end surface of the sampling drill tube, a centrifugal block is movably arranged on the inner side of the guide cylinder, and a second steel rope is fixedly connected between the centrifugal block and the first steel rope. The sample collection device and method for land exploration can limit and support soil samples during the collection process, avoid soil samples from slipping and failing to maintain integrity, and effectively improve the subsequent detection accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of land exploration, and in particular to a sample collection device and a sample collection method for land exploration. Background Art

[0002] Land exploration is an important basis for land management. It is the demarcation work for land planning, development, consolidation, reclamation, etc. During the land exploration process, sample collection equipment is needed to collect soil samples for subsequent testing and analysis.

[0003] The prior art (application number: 202410649256.9, Chinese patent with application date of 2024-05-24) discloses a soil segmented sampler. When the drill bit drills into the soil, the soil sample enters the drill rod from the drill bit, and the interception plate is automatically pushed open, so that the interception plate is close to the top wall of the installation groove and does not hinder the entry of the soil sample. In the process of pulling out the drill rod, the push-pull assembly pushes the interception plate to rotate inward, so that the soil sample can be supported from the bottom by the interception plate, thereby preventing the soil sample from falling down;

[0004] Although it can support soil samples during use, when collecting the soil later, the interception plate needs to be rotated inward. At this time, there is soil sample on the inner side of the interception plate, which makes it impossible to effectively flip the interception plate, making it inconvenient to take out the soil sample, and there are certain usage defects. Summary of the invention

[0005] The object of the present invention is to provide a land exploration sample collection device and a collection method to solve the problems of land exploration sample collection devices currently on the market raised by the above background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a land exploration sample collection device and collection method, comprising a support base, and a bracket is fixedly installed on the outer side of the support base, and a handle and a roller are installed on the bracket;

[0007] It also includes: a fixed rod, fixedly mounted on the upper surface of the support base, a support top seat fixedly mounted on the upper end of the fixed rod, a movable seat lifted and lowered on the outer side of the fixed rod, an adjustment mechanism arranged between the support top seat and the movable seat, a drive motor fixedly mounted on the upper surface of the movable seat, an output end of the drive motor passes through the movable seat and is fixedly connected to a sampling drill barrel, a drill bit is integrally arranged at the lower end of the sampling drill barrel, a partition inner barrel is fixedly mounted on the inner side of the sampling drill barrel, and a rubber bag is bonded and fixed to the inner wall of the partition inner barrel;

[0008] Two fixed cylinders are symmetrically fixedly installed on the upper end surface of the sampling drill cylinder, a movable plate is installed on the inner side of the fixed cylinder for lifting, and two first steel ropes are symmetrically connected between the two movable plates;

[0009] The guide cylinder is evenly and fixedly installed on the upper end surface of the sampling drill tube. A centrifugal block is movably arranged inside the guide cylinder, and a second steel rope is fixedly connected between the centrifugal block and the first steel rope.

[0010] Preferably, the adjustment mechanism includes a lifting motor fixedly mounted on the upper surface of the supporting top seat, and the output end of the lifting motor is fixedly connected with an adjusting screw rod, and the adjusting screw rod passes through the movable seat and is threadedly connected thereto, and the movable seat and the fixed rod constitute a sliding structure.

[0011] By adopting the above technical solution, the lifting motor is controlled to drive the adjusting screw to rotate, so that the adjusting screw can drive the movable seat to be lifted and lowered along the fixed rod through the threaded connection, thereby facilitating the subsequent drilling and removal of the sampling drill tube.

[0012] Preferably, the inner diameter of the sampling drill tube is larger than the inner diameter of the drill bit, and the rubber bag is arranged in an annular structure, and the inner diameter of the rubber bag is smaller than the inner diameter of the drill bit.

[0013] By adopting the above technical solution, during the drilling process of the drill bit, the outer diameter of the columnar soil sample inserted into the inner side of the drill barrel is smaller than the inner diameter of the sampling drill barrel and the rubber bag, thereby reducing the friction between the sampling drill barrel and the columnar soil sample, thereby reducing the drilling power consumption.

[0014] Preferably, the centrifugal block is located inside the guide cylinder and forms a sliding telescopic structure with the guide cylinder, a first spring is fixedly connected between the centrifugal block and the end wall of the guide cylinder, and the centrifugal block slides by centrifugal force during the rotation of the sampling drill cylinder.

[0015] By adopting the above technical solution, when the equipment is working, the high-speed rotation of the sampling drill tube will drive the guide tube and the centrifugal block to rotate synchronously, so that the centrifugal block slides elastically on the inner side of the guide tube under the action of centrifugal force.

[0016] Preferably, the middle portion of the second steel rope is located below the partition inner cylinder, and the middle portion of the second steel rope is evenly connected to the first steel ropes, and the middle portion of the second steel rope is arranged in an arc shape under the traction of multiple first steel ropes.

[0017] By adopting the above technical solution, when the centrifugal block slides along the guide cylinder, the middle part of the second steel rope can be pulled by the first steel rope, so that the middle part of the first steel rope maintains an arc state, ensuring that the arc radius generated by the middle part of the first steel rope is larger than the radius of the drill bit.

[0018] Preferably, a second spring is fixedly connected between the movable plate and the fixed cylinder, and the second steel rope pulls the movable plate elastically downward on the inner side of the fixed cylinder under the traction of the first steel rope, and the sample soil and the underlying soil are separated during the process of the middle part of the second steel rope being reset and straightened. A pressing block is provided on the outer side of the movable plate, and the pressing block slides through the through groove opened in the side wall of the fixed cylinder.

[0019] By adopting the above technical solution, when the sampling drill tube stops rotating, the movable plate will elastically move upward along the fixed tube under the elastic force of the second spring, thereby pulling the two ends of the two second steel ropes through the two movable plates, so that the middle bent part of the second steel rope can be restored to be straight, and the soil can be divided in this process.

[0020] Preferably, the elastic force of the first spring is smaller than the elastic force of the second spring, and the sum of the elastic force of the first spring and the centrifugal force of the centrifugal block is larger than the elastic force of the second spring.

[0021] By adopting the above technical solution, when the sampling drill tube rotates, the centrifugal block can be elastically extended and retracted to pull the movable plate downward to squeeze the second spring. When the sampling drill tube stops rotating, the movable plate can be elastically reset. Subsequent pressing of the movable plate can make the centrifugal block slide under the elastic force of the first spring to facilitate subsequent collection of samples.

[0022] Preferably, an air storage bag is connected between the fixed tube and the movable plate, and an air pipe is connected between the air storage bag and the rubber bag. When the air storage bag is pressurized, part of the gas inside it enters the rubber bag, and the rubber bag expands to clamp the soil sample.

[0023] By adopting the above technical solution, when the movable plate is elastically reset and squeezes the air storage bag, part of the gas in the air storage bag can be transported to the rubber bag through the air pipe, so that the rubber bag expands and clamps the soil sample, ensuring the structural distribution integrity of the soil taken out.

[0024] A method for collecting samples using a land exploration sample collection device, comprising the following steps:

[0025] S1. Push the device by holding the handle, so that the device moves to the sampling position under the action of the roller, stably place the support base at the sampling point, and then start the drive motor, so that the drive motor drives the sampling drill tube to rotate at high speed. At this time, the centrifugal block will elastically slide along the guide tube under the action of centrifugal force, so that the centrifugal block pulls the middle position of the second steel rope through the first steel rope, so that the middle part of the second steel rope becomes an arc and moves to the bottom of the partition inner tube;

[0026] S2, start the lifting motor, so that the lifting motor drives the adjusting screw to rotate, so that the adjusting screw drives the movable seat to slide down along the fixed rod through the threaded connection, so that the drill bit under the sampling drill tube approaches and contacts the soil at the sampling location, and the drill bit can drive the sampling drill tube to drill into the soil;

[0027] S3. When drilling to a preset depth, the driving motor is turned off to stop the sampling drill tube from rotating. At this time, the movable plate will move upward along the inner side of the fixed tube under the elastic force of the second spring, so that when the two movable plates move upward synchronously, the curved middle parts of the two second steel ropes are pulled to gradually straighten and fit together, so that the second steel ropes can divide the bottom layer of the soil sample. At the same time, the second steel rope and the first steel rope connected to the outside thereof can support the lower end of the sample soil. At the same time, the movable plate will squeeze the air storage bag during the upward movement, so that part of the gas in the air storage bag enters the rubber bag through the air pipe, so that the rubber bag expands and clamps the columnar sample soil to prevent the sample soil from falling off from the sampling drill tube. Then the lifting motor is controlled to drive the adjusting screw to rotate in the opposite direction, so that the movable seat drives the sampling drill tube to move upward;

[0028] S4. After the sampling drill tube is taken out from the borehole, the pressing block on the outer side of the movable plate is pressed along the through groove on the side wall of the fixed tube, so that the movable plate moves downward on the inner side of the fixed tube. At this time, part of the gas in the rubber bag returns to the air storage bag again, thereby releasing the clamping of the columnar soil sample, and the centrifugal block will slide along the guide tube under the elastic force of the first spring, so that the first steel rope pulls the second steel rope to bend, so that the first steel rope and the second steel rope release their support for the soil sample, which is convenient for the subsequent complete removal and collection of the sample.

[0029] Compared with the prior art, the beneficial effects of the present invention are: the land exploration sample collection equipment and collection method can limit and support the soil sample during the collection process, prevent the soil sample from slipping and losing its integrity, and effectively improve the subsequent detection accuracy. The specific contents are as follows;

[0030] 1. An adjusting screw and a movable seat are provided. By controlling the lifting motor to drive the adjusting screw to rotate, the adjusting screw can drive the movable seat to move up and down along the fixed rod, and the sampling drill tube can be driven to drill down and lift up, so as to facilitate the equipment to perform drilling sampling and sample collection;

[0031] 2. A movable plate and a second steel rope are provided. When drilling is completed, the movable plate will move upward under the elastic force of the first spring, thereby pulling the two second steel ropes, so that the curved parts in the middle of the two second steel ropes gradually become straight and fit together. At this time, the second steel rope can split the lower end of the soil sample, thereby facilitating the subsequent sample to be separated from the ground;

[0032] 3. A first steel rope, a centrifugal block and a second steel rope are provided. As the sampling drill tube rotates, the centrifugal block pulls the second steel rope through the first steel rope under the action of centrifugal force, so that the second steel rope can be bent to hold the soil sample. When the second steel rope is reset and straightened, the first steel rope can be pulled, so that the first steel rope and the second steel rope can provide auxiliary support for the lower end of the soil sample.

[0033] 4. A rubber bag and an air storage bag are provided. When drilling stops, the air storage bag will be squeezed during the resetting process of the movable plate, so that part of the gas in the air storage bag will enter the rubber bag through the air pipe. At this time, the rubber bag will expand and clamp the columnar soil sample, thereby clamping and fixing the sample, thereby avoiding the phenomenon of soil sample falling when the sampling drill tube is lifted. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0035] Figure 2 It is a rear view structural schematic diagram of the present invention;

[0036] Figure 3 It is a schematic diagram of the cross-sectional structure of the movable seat of the present invention;

[0037] Figure 4 This is a schematic diagram of the main structure of the sampling drill tube of the present invention;

[0038] Figure 5 This is a schematic diagram of the cross-sectional structure of the sampling drill tube of the present invention;

[0039] Figure 6 For the present invention Figure 5 The enlarged structural diagram at A in the middle;

[0040] Figure 7 This is a schematic diagram of the disassembly structure of the sampling drill tube, the separation inner tube and the rubber bag of the present invention;

[0041] Figure 8 This is a schematic diagram of the connection structure of the first steel rope and the second steel rope of the present invention;

[0042] Fig. 9 This is a schematic diagram of the centrifugal block installation structure of the present invention.

[0043] In the figure: 1. Support base; 2. Fixed rod; 3. Support top seat; 4. Lifting motor; 5. Adjusting screw rod; 6. Movable seat; 7. Driving motor; 8. Sampling drill tube; 9. Drill bit; 10. Separating inner tube; 11. Rubber bag; 12. Fixed tube; 13. Movable plate; 14. First steel rope; 15. Guide tube; 16. Centrifugal block; 17. First spring; 18. Second steel rope; 19. Second spring; 20. Air storage bag; 21. Air pipe. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] Example 1: Please refer to Figure 1-Figure 4 and Figure 7-Figure 9 As shown, the existing land exploration sample collection equipment is inconvenient to separate the lower end of the soil sample, resulting in the inability to separate the soil sample from the land. In order to solve this technical problem, this embodiment discloses the following technical content;

[0046] A sample collection device for land exploration, comprising a support base 1, a bracket fixedly mounted on the outer side of the support base 1, and a handle and a roller mounted on the bracket;

[0047] It also includes: a fixed rod 2, which is fixedly mounted on the upper surface of the support base 1, a support top seat 3 is fixedly mounted on the upper end of the fixed rod 2, and a movable seat 6 is lifted and lowered on the outer side of the fixed rod 2, and an adjustment mechanism is provided between the support top seat 3 and the movable seat 6, and a drive motor 7 is fixedly mounted on the upper surface of the movable seat 6, and the output end of the drive motor 7 passes through the movable seat 6 and is fixedly connected to a sampling drill tube 8, and a drill bit 9 is integrally provided at the lower end of the sampling drill tube 8, a partition inner tube 10 is fixedly mounted on the inner side of the sampling drill tube 8, and a rubber bag 11 is bonded and fixed to the inner wall of the partition inner tube 10;

[0048] Two fixed cylinders 12 are symmetrically fixedly installed on the upper end surface of the sampling drill cylinder 8, and a movable plate 13 is installed inside the fixed cylinder 12 for lifting, and two first steel ropes 14 are symmetrically connected between the two movable plates 13;

[0049] The guide cylinder 15 is evenly fixedly installed on the upper end surface of the sampling drill tube 8, and a centrifugal block 16 is movably arranged inside the guide cylinder 15, and a second steel rope 18 is fixedly connected between the centrifugal block 16 and the first steel rope 14;

[0050] The adjustment mechanism includes a lifting motor 4 fixedly mounted on the upper surface of the supporting top seat 3, and the output end of the lifting motor 4 is fixedly connected with an adjusting screw 5, and the adjusting screw 5 passes through the movable seat 6 and is threadedly connected thereto, and the movable seat 6 and the fixed rod 2 form a sliding structure.

[0051] The inner diameter of the sampling drill tube 8 is larger than the inner diameter of the drill bit 9 , and the rubber bag 11 is arranged in an annular structure, and the inner diameter of the rubber bag 11 is smaller than the inner diameter of the drill bit 9 .

[0052] The centrifugal block 16 is located inside the guide tube 15 and forms a sliding telescopic structure with the guide tube 15 . A first spring 17 is fixedly connected between the centrifugal block 16 and the end wall of the guide tube 15 . The centrifugal block 16 slides due to centrifugal force during the rotation of the sampling drill tube 8 .

[0053] The middle of the second steel rope 18 is located below the partition inner tube 10 , and the middle of the second steel rope 18 is evenly connected to the first steel ropes 14 , and the middle of the second steel rope 18 is arranged in an arc shape under the traction of multiple first steel ropes 14 .

[0054] By adopting the above technical solution, the device is pushed by holding the handle, so that the device moves to the sampling position under the action of the roller, and the support base 1 is stably placed at the sampling point, and then the drive motor 7 is started, so that the drive motor 7 drives the sampling drill tube 8 to rotate at high speed. At this time, the centrifugal block 16 will elastically slide along the guide tube 15 under the action of centrifugal force, so that the centrifugal block 16 pulls the middle position of the second steel rope 18 through the first steel rope 14, so that the middle part of the second steel rope 18 becomes an arc and moves to the bottom of the partition inner tube 10; the lifting motor 4 is started, so that the lifting motor 4 drives the adjusting screw rod 5 to rotate , so that the adjusting screw rod 5 drives the movable seat 6 to slide down along the fixed rod 2 through the threaded connection, so that the drill bit 9 under the sampling drill tube 8 approaches and contacts the soil at the sampling location, and the drill bit 9 can drive the sampling drill tube 8 to drill into the soil; when drilling to a preset depth, the driving motor 7 is turned off, so that the sampling drill tube 8 stops rotating, and at this time, the movable plate 13 will move up along the inner side of the fixed tube 12 under the elastic force of the second spring 19, so that when the two movable plates 13 move up synchronously, the curved middle parts of the two second steel ropes 18 are pulled gradually straightened and fitted together, so that the second steel ropes 18 can segment the bottom layer of the soil sample.

[0055] Embodiment 2: The technical content disclosed in this embodiment is a further improvement on the above embodiment 1. The existing land exploration sample collection equipment is inconvenient to limit the soil sample during soil sample collection, which makes the soil sample easy to slip and cannot maintain complete stratification, reducing the subsequent detection accuracy. In order to further solve this technical problem, this embodiment discloses the following technical content, such as Figure 5-Figure 9 As shown; a second spring 19 is fixedly connected between the movable plate 13 and the fixed cylinder 12, and the second steel rope 18 pulls the movable plate 13 elastically downward on the inner side of the fixed cylinder 12 under the traction of the first steel rope 14, and the sample soil and the underlying soil are separated during the process of the middle part of the second steel rope 18 being reset and straightened. A pressing block is arranged on the outer side of the movable plate 13, and the pressing block slides through the through groove opened on the side wall of the fixed cylinder 12.

[0056] The elastic force of the first spring 17 is smaller than the elastic force of the second spring 19 , and the sum of the elastic force of the first spring 17 and the centrifugal force of the centrifugal weight 16 is larger than the elastic force of the second spring 19 .

[0057] An air bag 20 is connected between the fixed tube 12 and the movable plate 13, and an air pipe 21 is connected between the air bag 20 and the rubber bag 11. When the air bag 20 is pressurized, part of the gas inside it enters the rubber bag 11, and the rubber bag 11 expands to clamp the soil sample.

[0058] By adopting the above technical solution, the second steel rope 18 and the first steel rope 14 connected to the outside thereof can support the lower end of the sample soil. At the same time, the movable plate 13 will squeeze the air storage bag 20 during the upward movement, so that part of the gas in the air storage bag 20 enters the rubber bag 11 through the air pipe 21, so that the rubber bag 11 expands and clamps the columnar sample soil to prevent the sample soil from falling off from the sampling drill tube 8. Then, the lifting motor 4 is controlled to drive the adjusting screw rod 5 to rotate in the opposite direction, so that the movable seat 6 drives the sampling drill tube 8 to move upward; the sampling drill tube 8 moves from the drill tube 8. After being taken out from the hole, the pressing block on the outer side of the movable plate 13 is pressed along the through groove on the side wall of the fixed cylinder 12, so that the movable plate 13 moves downward on the inner side of the fixed cylinder 12. At this time, part of the gas in the rubber bag 11 returns to the air storage bag 20 again, thereby releasing the clamping of the columnar soil sample, and the centrifugal block 16 will slide along the guide cylinder 15 under the elastic force of the first spring 17, so that the first steel rope 14 pulls the second steel rope 18 to bend, so that the first steel rope 14 and the second steel rope 18 release their support for the soil sample, which is convenient for the subsequent complete removal and collection of the sample.

[0059] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0060] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sample collection device for land exploration, comprising a support base (1), wherein a bracket is fixedly mounted on the outer side of the support base (1), and a handle and a roller are mounted on the bracket; It is characterized in that Also includes: A fixed rod (2) is fixedly mounted on the upper surface of the support base (1); a support top seat (3) is fixedly mounted on the upper end of the fixed rod (2); a movable seat (6) is lifted and mounted on the outer side of the fixed rod (2); an adjustment mechanism is provided between the support top seat (3) and the movable seat (6); a drive motor (7) is fixedly mounted on the upper surface of the movable seat (6); an output end of the drive motor (7) passes through the movable seat (6) and is fixedly connected to a sampling drill tube (8); a drill bit (9) is integrally provided at the lower end of the sampling drill tube (8); a partition inner tube (10) is fixedly mounted on the inner side of the sampling drill tube (8); and a rubber bag (11) is bonded and fixed to the inner wall of the partition inner tube (10); Two fixed cylinders (12) are symmetrically fixedly mounted on the upper end surface of the sampling drill cylinder (8); a movable plate (13) is installed inside the fixed cylinder (12) for lifting, and two first steel ropes (14) are symmetrically connected between the two movable plates (13); The guide cylinder (15) is evenly fixedly mounted on the upper end surface of the sampling drill cylinder (8), a centrifugal block (16) is movably arranged inside the guide cylinder (15), and a second steel rope (18) is fixedly connected between the centrifugal block (16) and the first steel rope (14), the centrifugal block (16) is located inside the guide cylinder (15) and forms a sliding telescopic structure with the guide cylinder (15), a first spring (17) is fixedly connected between the centrifugal block (16) and the end wall of the guide cylinder (15), and the centrifugal block (16) slides by centrifugal force during the rotation of the sampling drill cylinder (8), the middle part of the second steel rope (18) is located below the partition inner cylinder (10), and the middle part of the second steel rope (18) is evenly connected to the first steel rope (14), and the second steel rope (18) is The middle part of the movable plate (13) is arranged in an arc shape under the traction of multiple first steel ropes (14), a second spring (19) is fixedly connected between the movable plate (13) and the fixed cylinder (12), and the second steel rope (18) pulls the movable plate (13) to elastically move downward on the inner side of the fixed cylinder (12) under the traction of the first steel rope (14), and the sample soil and the bottom soil are separated during the process of the middle part of the second steel rope (18) being reset and straightened, a pressing block is arranged on the outer side of the movable plate (13), and the pressing block slides through a through groove opened on the side wall of the fixed cylinder (12), the elastic force of the first spring (17) is smaller than the elastic force of the second spring (19), and the sum of the elastic force of the first spring (17) and the centrifugal force of the centrifugal block (16) is greater than the elastic force of the second spring (19).

2. A land exploration sample collection device according to claim 1, characterized in that: The adjustment mechanism comprises a lifting motor (4) fixedly mounted on the upper surface of the supporting top seat (3), and an adjusting screw rod (5) is fixedly connected to the output end of the lifting motor (4), and the adjusting screw rod (5) passes through the movable seat (6) and is threadedly connected thereto, and the movable seat (6) and the fixed rod (2) form a sliding structure.

3. A land exploration sample collection device according to claim 1, characterized in that: The inner diameter of the sampling drill tube (8) is larger than the inner diameter of the drill bit (9), and the rubber bag (11) is arranged in an annular structure, and the inner diameter of the rubber bag (11) is smaller than the inner diameter of the drill bit (9).

4. A land exploration sample collection device according to claim 1, characterized in that: An air storage bag (20) is connected between the fixed cylinder (12) and the movable plate (13), and an air delivery pipe (21) is connected between the air storage bag (20) and the rubber bag (11). When the air storage bag (20) is pressurized, part of the gas inside the air storage bag enters the rubber bag (11), and the rubber bag (11) expands to clamp the soil sample.

5. A sampling method for a land exploration sample collection device, applied to a land exploration sample collection device as claimed in any one of claims 1 to 4, characterized in that: The following steps are involved: S1. Push the device by holding the handle so that the device moves to the sampling position under the action of the roller, stably place the support base (1) at the sampling point, and then start the drive motor (7) so that the drive motor (7) drives the sampling drill tube (8) to rotate at a high speed. At this time, the centrifugal block (16) elastically slides along the guide tube (15) under the action of centrifugal force, so that the centrifugal block (16) pulls the middle position of the second steel rope (18) through the first steel rope (14), so that the middle part of the second steel rope (18) becomes an arc and moves to the bottom of the partition inner tube (10); S2, starting the lifting motor (4), so that the lifting motor (4) drives the adjusting screw rod (5) to rotate, so that the adjusting screw rod (5) drives the movable seat (6) to slide down along the fixed rod (2) through the threaded connection, thereby making the drill bit (9) below the sampling drill tube (8) close to and contact the soil at the sampling location, and the drill bit (9) can drive the sampling drill tube (8) to drill into the soil; S3. When drilling to a preset depth, the driving motor (7) is turned off, so that the sampling drill tube (8) stops rotating. At this time, the movable plate (13) moves upward along the inner side of the fixed tube (12) under the elastic force of the second spring (19), so that the two movable plates (13) move upward synchronously, pulling the curved middle parts of the two second steel ropes (18) to gradually straighten and fit together, so that the second steel ropes (18) can split the bottom layer of the soil sample. At the same time, the second steel ropes (18) and the first steel ropes connected to the outside thereof are The steel rope (14) can support the lower end of the sample soil, and the movable plate (13) will squeeze the air storage bag (20) when it moves upward, so that part of the gas in the air storage bag (20) enters the rubber bag (11) through the gas pipe (21), so that the rubber bag (11) expands and clamps the columnar sample soil to prevent the sample soil from falling off from the sampling drill tube (8), and then the lifting motor (4) is controlled to drive the adjusting screw rod (5) to rotate in the opposite direction, so that the movable seat (6) drives the sampling drill tube (8) to move upward; S4. After the sampling drill tube (8) is taken out of the borehole, the pressing block on the outer side of the movable plate (13) is pressed along the through groove on the side wall of the fixed tube (12), so that the movable plate (13) moves downward inside the fixed tube (12). At this time, part of the gas in the rubber bag (11) returns to the gas storage bag (20) again, thereby releasing the clamping of the columnar soil sample, and the centrifugal block (16) slides along the guide tube (15) under the elastic force of the first spring (17), so that the first steel rope (14) pulls the second steel rope (18) to bend, so that the first steel rope (14) and the second steel rope (18) release their support for the soil sample, which is convenient for the subsequent complete removal and collection of the sample.

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