Sampling method for geological exploration

Abstract

The invention discloses a sampling method for geological exploration, and relates to the technical field of geological exploration sampling, and the sampling method comprises the steps of drilling of a rotating rod and a sampling barrel, opening of a sampling opening, stretching of a scraper blade, sample soil collection and collection barrel switching. According to drilling of the rotating rod and the sampling barrel, a drill bit and a drill rod are drilled into the target depth of the land needing geological exploration sampling, and in the process, an annular baffle is in the state of shielding a sampling opening, according to the sampling method for geological exploration, by arranging the movable annular baffle, when the sampling barrel moves underground, the sampling opening can be shielded, and the sampling barrel is prevented from moving underground; and the sampling port can be opened when the scraper extends out of the sampling barrel for sampling, so that the problem that part of soil enters the sampling barrel through the sampling port when the sampling barrel does not descend to the sampling depth is avoided, the quality of a subsequently sampled soil sample is ensured, and the sampling precision of geological exploration is improved.

Description

Technical Field

[0001] The invention relates to the technical field of geological exploration sampling, in particular to a sampling method for geological exploration. Background Art

[0002] Geological exploration is a survey and research activity that uses various means and methods to investigate and detect geology, determine the appropriate bearing layer, determine the foundation type based on the bearing capacity of the bearing layer, and calculate the foundation parameters. When conducting geological exploration in a certain area, it is necessary to sample and analyze the soil in the area. In specific use, a drill rig is usually used to drill a drill rod carrying a sampler into the ground to sample the soil at the target depth underground.

[0003] For example, a geological exploration sampler disclosed in Chinese invention CN115979706A includes a backfill driving motor, which is electrically connected to an electric control box and fixed on the top of an adjusting support plate. The output end of the backfill driving motor is connected to a backfill rotating shaft by a coupling. The lower end of the backfill rotating shaft passes through a backfill inlet provided on the adjusting support plate and is then screwed to the inner bottom wall of a sampling rod by a supporting bearing; a backfill feeding spiral sheet is sleeved and fixed on the backfill rotating shaft, and its outer edge is movably contacted with the inner wall of the sampling rod; a plurality of backfill discharge holes are provided through the outer wall of the lower end of the sampling rod. The geological exploration sampler can fill the backfill into a borehole to avoid potential safety hazards caused by loose soil.

[0004] However, in the actual use of the sampling devices for geological exploration such as those in the above-mentioned reference documents, there are still the following problems: 1. The sampling port of the sampling device for geological exploration in the prior art is usually in an open state. During the drilling process, the sampling device has not yet reached the target depth, and some external soil samples will enter the sampling tube in advance through the sampling port, resulting in the inability to accurately obtain soil samples at the target depth, resulting in a low sampling accuracy problem.

[0005] 2. The sampling tube in the sampling device for geological exploration in the prior art can usually only sample once at one depth. If multiple samplings are required at different depths, soil at different depths will enter the same sampling tube, which will affect the accuracy of subsequent detection and analysis and has low practicality. Summary of the invention

[0006] To achieve the above object, the present invention provides the following technical solution: a sampling method for geological exploration, the sampling method comprising the following steps: The rotating rod and the sampling tube are drilled, and the drill rod is connected to an external driving device. The external driving device is controlled to make the drill bit and the drill rod drill to the target depth of the land where geological survey sampling is required. During this process, the annular baffle is in a state of covering the sampling port; The sampling port is opened and the scraper is extended. After the sampling barrel is lowered to the sampling depth, the motor is turned on to drive the rotating rod and the rotating disk to rotate, so that the sleeve and the scraper move away from the sampling barrel. During this process, under the action of the hinge plate, the hinged annular baffle moves downward and separates from the sampling port. At this time, the scraper can be extended through the sampling port to the outside of the sampling barrel to perform sampling operations; Switch between soil sample collection and collection tube. After the scraper has finished sampling once, turn on the motor again to reset the scraper to just above a collection tube. Control the electric push rod to retract and drive the second rack to move, so that the second gear drives the scraper to rotate to the position where the sampling opening is downward, and the soil sample in the scraper will fall into the collection tube under the action of gravity; After the soil samples in the collection tube are collected, the electric push rod is controlled to extend to drive the rack row 2 to reset. Under the meshing action of the rack row 2 and the gear 3, the connecting plate can be rotated 90 degrees to switch the positions of the four collection tubes.

[0007] Optionally, a drill rod is fixedly mounted on the upper surface of the sampling barrel, a drill bit is fixedly mounted on the lower surface of the sampling barrel, an annular baffle is slidably connected to the inner wall of the sampling barrel, a sampling port is provided on the surface of the sampling barrel, a fixing column is fixedly connected to the inner wall of the sampling barrel, a connecting ring is provided on the inner wall of the fixing column, the fixing column is connected to a connecting plate by fixed axis rotation through the connecting ring, and four collecting barrels distributed in a circular array are detachably connected to the upper surface of the connecting plate; A support plate is fixedly mounted on the inner wall of the sampling tube, two scrapers are arranged below the support plate, and a sampling component for making the two scrapers extend out of the sampling port is arranged below the support plate; The interior of the sampling cylinder is also provided with auxiliary components, a collecting component and a switching component; The auxiliary component is in driving connection with the sampling component, and can make the annular baffle descend when the two scrapers move so as to no longer block the sampling port; The collecting component is used to turn the scraper over after the scraper obtains the soil sample, so as to pour the sample into the collecting tube; The switching component is in driving connection with the collecting component and is used for switching to another collecting tube after the sample is collected in one collecting tube.

[0008] Optionally, the sampling component includes a motor fixedly mounted on the upper surface of the support plate, the output shaft of the motor is fixedly connected to a rotating rod, and a rotating disk is provided on the surface of the rotating rod; The lower surface of the support plate is fixedly connected to two connection columns, the support plate is fixedly connected to a limit frame via the connection columns, and the inner wall of the limit frame is slidably connected to two symmetrically arranged moving blocks.

[0009] Optionally, the surface of the turntable is provided with two symmetrically arranged arc-shaped notches 1, the inner walls of the two arc-shaped notches 1 are slidably connected with moving columns, the ends of the moving columns extending out of the arc-shaped notches 1 are fixedly connected to the moving blocks, the surface of the moving blocks is fixedly connected with a connecting rod, and the surface of the connecting rod is fixedly connected with a plurality of elastic protrusions distributed in a circular array; It also includes a sleeve, which is sleeved on the outer surfaces of the plurality of elastic protrusions and the connecting rod, one end of the sleeve is rotatably connected to the moving block, and the other end of the sleeve is fixedly connected to the scraper.

[0010] Optionally, the surface of the turntable is provided with two arc-shaped slots 2, the surface of the arc-shaped slots 2 is slidably connected to a limiting column, one end of the limiting column is fixedly connected to the support plate, and the other end of the limiting column is fixedly connected to a stopper.

[0011] Optionally, the auxiliary component includes a gear 1 fixedly connected to the end of the rotating rod, the inner wall of the sampling tube is slidably connected to two symmetrically arranged rack rows 1, the surface of the rack row 1 is hinged with a hinge plate, the end of the hinge plate is hinged with a hinge block, the upper surface of the hinge block is fixedly connected with a connecting block, and the hinge block is fixedly connected to the annular baffle via the connecting block.

[0012] Optionally, a sliding block 1 is fixedly connected to the surface of the hinge block, and a rectangular notch 1 is provided on the inner wall of the sampling tube for the sliding block 1 to extend and slide; The lower surface of the rack row 1 is fixedly connected with a sliding block 2, and the inner wall of the sampling tube is provided with a rectangular notch 2 for the sliding block 2 to extend and slide.

[0013] Optionally, the collecting component includes a second gear fixedly connected to the surface of the sleeve, a fixing plate is fixedly connected to the side of the support plate, an electric push rod is fixedly installed on the surface of the fixing plate, and an output end of the electric push rod is fixedly connected to a second rack row meshing with the second gear.

[0014] Optionally, the switching component includes a rotating shaft fixedly connected to the upper surface of the connecting plate, a one-way bearing is provided on the surface of the rotating shaft, and the rotating shaft is fixedly connected to a gear three meshing with the rack row two via the one-way bearing.

[0015] Compared with the prior art, the present invention has the following beneficial effects: First, the present invention provides a movable annular baffle. When the drill rod drives the sampling barrel to move underground, the annular baffle can block the sampling port. After the sampling barrel descends to the sampling depth, the motor is turned on to drive the rotating rod and the rotating disk to rotate, so that the scraper can be extended in the direction away from the sampling barrel. In this process, under the action of the hinge plate, the hinge annular baffle moves downward to no longer block the sampling port. At this time, the scraper can be extended through the sampling port to the outside of the sampling barrel to perform sampling operations; That is, when the sampling tube moves underground, the sampling port is automatically closed, and when the scraper extends out of the sampling tube for sampling, the sampling port can be automatically opened, avoiding the problem that some soil enters the sampling tube through the sampling port before the sampling tube descends to the sampling depth, thereby ensuring the quality of the soil samples sampled subsequently and increasing the accuracy of geological survey sampling.

[0016] 2. When the scraper completes a soil sampling operation, the electric push rod is controlled to drive the rack row 2 to move back and forth. Under the meshing action of the rack row 2 and the gear 2, the scraper can be turned 180 degrees to a state with the opening facing downward. At this time, the soil sample in the scraper will fall into the collection tube under the action of gravity, so that the soil sample can be stored as soon as possible after the sampling is completed. As the rack row two moves in the opposite direction and resets, the connecting plate can be rotated 90 degrees under the meshing action of the rack row two and the gear three, so that the four collecting tubes can complete a position switch; after the next sampling of the scraper is completed, a new collecting tube can collect the soil sample, which can enable continuous sampling while avoiding the mixing of soil samples taken multiple times at different sampling depths, which will affect the accuracy of subsequent soil sample detection and analysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a flowchart of the use of the present invention; Figure 2 is an axonometric view of the structure of the present invention; Figure 3 The cross-sectional view of the sampling tube structure in the present invention Figure 1 ; Figure 4 The cross-sectional view of the sampling tube structure in the present invention Figure 2 ; Figure 5 For the present invention Figure 4 The enlarged view of point A in the middle; Figure 6 It is a cross-sectional view of the limiting frame structure in the present invention; Figure 7 It is a schematic diagram of the second structure of the rack row in the present invention; Figure 8It is a schematic diagram of the second gear structure in the present invention; Fig. 9 It is a schematic diagram of the turntable structure in the present invention.

[0018] In the figure: 1, sampling tube; 2, drill rod; 3, drill bit; 4, sampling port; 5, annular baffle; 6, scraper; 7, connecting column; 9, motor; 10, moving column; 12, moving block; 13, support plate; 15, collecting tube; 16, connecting plate; 17, connecting ring; 18, fixed column; 19, turntable; 20, rotating rod; 21, gear 1; 22, arc notch 1; 23, limit column; 24, stop block; 25 , arc-shaped slot two; 26, limit frame; 27, rack row two; 28, electric push rod; 30, gear row two; 31, sleeve; 32, connecting rod; 33, elastic protrusion; 34, fixed plate; 35, rotating shaft; 36, one-way bearing; 37, gear three; 38, hinge block; 39, slider one; 40, rectangular slot one; 41, hinge plate; 42, slider two; 43, rectangular slot two; 44, rack row one. DETAILED DESCRIPTION

[0019] 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.

[0020] For example, see Figures 1 to 9 The present invention provides a sampling method for geological exploration, as follows: The drill rod 2 is connected to an external driving device and controlled to make the drill bit 3 and the drill rod 2 drill to the target depth of the land where geological survey sampling is required. During this process, the annular baffle 5 is in a state of covering the sampling port 4. After the sampling tube 1 is lowered to the sampling depth, the motor 9 is turned on to drive the rotating rod 20 and the rotating disk 19 to rotate, so that the sleeve 31 and the scraper 6 move away from the sampling tube 1. In this process, under the action of the hinge plate 41, the hinge annular baffle 5 moves downward and separates from the sampling port 4. At this time, the scraper 6 can extend through the sampling port 4 to the outside of the sampling tube 1 to perform the sampling operation; After the scraper 6 has finished sampling once, the motor 9 is turned on again, so that the scraper 6 can be reset to just above a collection tube 15; The electric push rod 28 is controlled to retract, driving the second rack 27 to move, so that the second gear 30 drives the scraper 6 to rotate to a position where the sampling opening is downward, and the soil sample in the scraper 6 will fall into the collection tube 15 under the action of gravity; After the soil sample in the collecting tube 15 is collected, the electric push rod 28 is controlled to extend to drive the rack row 27 to reset. Under the meshing action of the rack row 27 and the gear 3 37, the connecting plate 16 can be rotated 90 degrees to switch the positions of the four collecting tubes 15.

[0021] It is worth noting that a sampling tube 1 is used in the sampling method for geological exploration. A drill rod 2 is fixedly installed on the upper surface of the sampling tube 1, a drill bit 3 is fixedly installed on the lower surface of the sampling tube 1, an annular baffle 5 is slidably connected to the inner wall of the sampling tube 1, a sampling port 4 is opened on the surface of the sampling tube 1, a fixing column 18 is fixedly connected to the inner wall of the sampling tube 1, a connecting ring 17 is arranged on the inner wall of the fixing column 18, the fixing column 18 is connected to a connecting plate 16 by a fixed axis rotation through the connecting ring 17, and four collecting tubes 15 distributed in a circumferential array are detachably connected to the upper surface of the connecting plate 16; A support plate 13 is fixedly mounted on the inner wall of the sampling tube 1 , two scrapers 6 are arranged below the support plate 13 , and a sampling component is arranged below the support plate 13 ; auxiliary components, a collecting component and a switching component are also arranged inside the sampling tube 1 .

[0022] More specifically, when this embodiment is in use: the drill rod 2 is connected to an external driving device, and the external driving device is controlled, so that the drill bit 3 and the drill rod 2 can be drilled into the land where geological survey and sampling are required. This is a relatively mature existing technology in the field of geological survey and sampling, and will not be described in detail here.

[0023] It is worth noting that Figure 3 As shown, in the process of the sampling tube 1 being driven down by the drill rod 2, since the annular baffle 5 is in a state of covering the sampling port 4, the problem of some soil entering the sampling tube 1 through the sampling port 4 when the sampling tube 1 descends to the sampling depth can be avoided, thereby ensuring the quality of the soil sampled at the target depth subsequently sampled, and the sampling accuracy is high.

[0024] Furthermore, the sampling component includes a motor 9 fixedly mounted on the upper surface of the support plate 13, the output shaft of the motor 9 is fixedly connected to a rotating rod 20, and a rotating disk 19 is provided on the surface of the rotating rod 20; The lower surface of the support plate 13 is fixedly connected to two connection columns 7 , and the support plate 13 is fixedly connected to the limit frame 26 via the connection columns 7 . The inner wall of the limit frame 26 is slidably connected to two symmetrically arranged moving blocks 12 .

[0025] The surface of the rotating disk 19 is provided with two symmetrically arranged arc-shaped slots 22, the inner walls of the two arc-shaped slots 22 are slidably connected with the moving columns 10, the ends of the moving columns 10 extending out of the arc-shaped slots 22 are fixedly connected with the moving blocks 12, the surface of the moving blocks 12 is fixedly connected with the connecting rods 32, and the surface of the connecting rods 32 is fixedly connected with a plurality of elastic protrusions 33 distributed in a circumferential array; It also includes a sleeve 31, which is sleeved on the outer surfaces of the multiple elastic protrusions 33 and the connecting rod 32. One end of the sleeve 31 is rotatably connected to the moving block 12, and the other end of the sleeve 31 is fixedly connected to the scraper 6.

[0026] It is worth noting that after the sampling tube 1 descends to the sampling depth, Figure 3 and Figure 4 As shown, the motor 9 is turned on to drive the rotating rod 20 and the rotating disk 19 to rotate. Since the moving block 12 is limited by the limiting frame 26 at this time, as the rotating disk 19 rotates, the moving column 10 fixedly connected to the lower surface of the moving block 12 and the arc-shaped groove 22 will slide relative to each other, and the moving block 12 will move away from the rotating disk 19. As the moving block 12 moves, the sleeve 31 and the scraper 6 will move away from the sampling tube 1 until the scraper 6 extends to the outside of the sampling port 4. At this time, under the action of the scraper 6, the soil at the target depth can be sampled.

[0027] Furthermore, two arc-shaped slots 25 are formed on the surface of the turntable 19 , and the surface of the arc-shaped slots 25 is slidably connected to a limiting column 23 , one end of the limiting column 23 is fixedly connected to the support plate 13 , and the other end of the limiting column 23 is fixedly connected to a stopper 24 .

[0028] When the motor 9 is turned on and the turntable 19 is driven to rotate, the limiting column 23 will also slide relatively in the arc-shaped slot 25. Under the action of the stop block 24, the limiting column 23 can be prevented from being separated from the arc-shaped slot 25 when sliding relatively. Under the cooperation of the limiting column 23 and the arc-shaped slot 25, the rotation of the turntable 19 can be further limited, so that the turntable 19 can be more stable when rotating to allow the scraper 6 to extend for sampling.

[0029] Embodiment 2, based on the above embodiment: Furthermore, the auxiliary component includes a gear 21 fixedly connected to the end of the rotating rod 20, and the inner wall of the sampling tube 1 is slidably connected to two symmetrically arranged rack rows 44, the surface of the rack row 44 is hinged with a hinge plate 41, the end of the hinge plate 41 is hinged with a hinge block 38, the upper surface of the hinge block 38 is fixedly connected with a connecting block, and the hinge block 38 is fixedly connected to the annular baffle 5 through the connecting block.

[0030] A sliding block 39 is fixedly connected to the surface of the hinge block 38, and a rectangular notch 40 is provided on the inner wall of the sampling tube 1 for the sliding block 39 to extend and slide. The lower surface of the rack row 1 44 is fixedly connected with a slide block 2 42 , and the inner wall of the sampling tube 1 is provided with a rectangular notch 2 43 for the slide block 2 42 to extend and slide.

[0031] More specifically, when this embodiment is used, Figure 8 and Fig. 9 As shown, when the motor 9 is turned on and the rotating rod 20 is driven to rotate, the gear 21 will also rotate synchronously. As the gear 21 rotates, the two rack rows 44 will move away from each other. In this process, since the hinge block 38 is limited by the slider 39 and the rectangular slot 40 and can only move in the vertical direction, the hinge block 38 drives the annular baffle 5 to move downward under the hinged action of the hinge plate 41, so that the annular baffle 5 no longer blocks the sampling port 4. At this time, the scraper 6 can be extended to the outside of the sampling tube 1 through the sampling port 4 to perform a sampling operation of the soil at the target depth.

[0032] Embodiment 3, based on the above embodiment: Furthermore, the collecting component includes a gear 2 30 fixedly connected to the surface of the sleeve 31, a fixing plate 34 is fixedly connected to the side of the support plate 13, an electric push rod 28 is fixedly installed on the surface of the fixing plate 34, and the output end of the electric push rod 28 is fixedly connected to a rack row 27 meshing with the gear 2 30.

[0033] The switching component includes a rotating shaft 35 fixedly connected to the upper surface of the connecting plate 16 , a one-way bearing 36 is provided on the surface of the rotating shaft 35 , and the rotating shaft 35 is fixedly connected to a gear 37 meshing with the rack row 27 via the one-way bearing 36 .

[0034] More specifically, when this embodiment is used, Figure 4 , Figure 5 and Figure 7 As shown, after a soil sampling operation is completed after the scraper 6 is extended to the outside of the sampling tube 1, the motor 9 is turned on to drive the turntable 19 to rotate in the opposite direction, so that the scraper 6 can be reset to the top of a collecting tube 15. At this time, with the reset of the scraper 6, the gear 2 30 will also move to a position meshing with the rack row 27. The electric push rod 28 is controlled to contract to move the rack row 27, so that the gear 2 30 can be rotated, so that the sleeve 31 can drive the scraper 6 to rotate 180 degrees, so that the sampling opening of the scraper 6 can be downward. At this time, the soil sample taken out by the scraper 6 will fall into the collecting tube 15 under the action of gravity, so that the soil sample can be preserved as soon as the sampling is completed.

[0035] After the soil sample in the collecting tube 15 is collected, the electric push rod 28 is controlled to extend so that the rack row 27 moves in the opposite direction and resets, which can make the gear 2 30 rotate in the opposite direction, so that the sleeve 31 and the scraper 6 can rotate in the opposite direction and reset. At this time, the sampling tube 1 can be adjusted to the next sampling depth through the external driving device for subsequent sampling operations.

[0036] like Figure 7 As shown, when the electric push rod 28 is controlled to extend so that the rack row 27 moves in the opposite direction to reset, the gear row 3 37 will start to rotate under the meshing action of the rack row 27 and the gear row 3 37, and the rotation of the gear row 37 at this time will drive the rotating shaft 35 to rotate synchronously. With the rotation of the rotating shaft 35, the connecting plate 16 will rotate 90 degrees. Since the transmission ratio between the gear row 37 and the rack row 27 is larger than the transmission ratio between the gear row 2 30 and the rack row 27, the positions of the four collecting barrels 15 can be switched once, so that the collecting barrel 15 that has collected the soil sample can be rotated to the outside away from the scraper 6, and the new collecting barrel 15 can be rotated again to the bottom of the scraper 6. After the sampling barrel 1 is adjusted to the next sampling depth for sampling, a new collecting barrel 15 will collect the soil sample of the next sampling depth, which effectively solves the problem that the soil samples taken out multiple times at different sampling depths are mixed together, which will affect the accuracy of subsequent soil sample detection and analysis.

[0037] It is worth noting that Figure 5 and Figure 6 As shown, under the action of the elastic potential energy of the multiple elastic protrusions 33, it can be ensured that when the sleeve 31 is not rotating, there is a large static friction between the scraper 6 and the moving block 12, so that the scraper 6 can be more stable and more practical when extending out of the sampling port 4 to sample soil samples.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sampling method for geological exploration, characterized in that: The following steps are involved: S1: The rotating rod and the sampling tube are drilled, and the drill bit (3) and the drill rod (2) are drilled to the target depth of the land where geological survey sampling is required. During this process, the annular baffle (5) is in a state of covering the sampling port (4); S2: the sampling port is opened and the scraper is extended. After the sampling tube (1) is lowered to the sampling depth, the motor (9) is turned on to drive the rotating rod (20) and the rotating disk (19) to rotate, so that the sleeve (31) and the scraper (6) move in a direction away from the sampling tube (1). During this process, under the action of the hinge plate (41), the hinged annular baffle (5) moves downward and separates from the sampling port (4). At this time, the scraper (6) can be extended through the sampling port (4) to the outside of the sampling tube (1) to perform the sampling operation; S3: Switching between soil sample collection and collection tube. After the scraper (6) completes one sampling, the motor (9) is turned on again to reset the scraper (6) to the position directly above a collection tube (15); By controlling the electric push rod (28) to retract and drive the second rack (27) to move, the second gear (30) can drive the scraper (6) to rotate to a position where the sampling opening is downward, and the soil sample in the scraper (6) falls into the collection tube (15) under the action of gravity.

2. A sampling method for geological exploration according to claim 1, characterized in that: The step S3 also includes the following steps: After the soil sample in the collection tube (15) is collected, the electric push rod (28) is controlled to extend, driving the second rack (27) to reset, and under the meshing action of the second rack (27) and the third gear (37), the connecting plate (16) is rotated 90 degrees to switch the positions of the four collection tubes (15).

3. A sampling method for geological exploration according to claim 2, characterized in that: A drill rod (2) is fixedly mounted on the upper surface of the sampling barrel (1), a drill bit (3) is fixedly mounted on the lower surface of the sampling barrel (1), an annular baffle (5) is slidably connected to the inner wall of the sampling barrel (1), a sampling port (4) is provided on the surface of the sampling barrel (1), a fixing column (18) is fixedly connected to the inner wall of the sampling barrel (1), a connecting ring (17) is provided on the inner wall of the fixing column (18), the fixing column (18) is rotatably connected to a connecting plate (16) via the connecting ring (17), and four collecting barrels (15) distributed in a circumferential array are detachably connected to the upper surface of the connecting plate (16); A support plate (13) is fixedly mounted on the inner wall of the sampling tube (1), two scrapers (6) are arranged below the support plate (13), and a sampling component for allowing the two scrapers (6) to extend out of the sampling port (4) is arranged below the support plate (13); The sampling cylinder (1) is also provided with auxiliary components, a collecting component and a switching component inside; The auxiliary component is in driving connection with the sampling component, so that when the two scrapers (6) move, the annular baffle (5) is lowered so as to no longer block the sampling port (4); The collecting component is used to flip the scraper (6) after it has obtained the soil sample, so as to pour the sample into the collecting tube (15); The switching component is in driving connection with the collecting component and is used to switch to another collecting tube (15) after collecting the sample in one collecting tube (15); The sampling component comprises a motor (9) fixedly mounted on the upper surface of the support plate (13); the output shaft of the motor (9) is fixedly connected to a rotating rod (20); and a rotating disk (19) is provided on the surface of the rotating rod (20); The lower surface of the support plate (13) is fixedly connected to two connecting columns (7), the support plate (13) is fixedly connected to a limit frame (26) via the connecting columns (7), and the inner wall of the limit frame (26) is slidably connected to two symmetrically arranged moving blocks (12); The surface of the rotating disk (19) is provided with two symmetrically arranged arc-shaped notches (22), the inner walls of the two arc-shaped notches (22) are slidably connected with moving columns (10), the ends of the moving columns (10) extending out of the arc-shaped notches (22) are fixedly connected to the moving blocks (12), the surface of the moving blocks (12) is fixedly connected with a connecting rod (32), and the surface of the connecting rod (32) is fixedly connected with a plurality of elastic protrusions (33) distributed in a circumferential array; The sampling component further comprises a sleeve (31), the sleeve (31) being sleeved on the outer surfaces of the plurality of elastic protrusions (33) and the connecting rod (32), one end of the sleeve (31) being rotatably connected to the moving block (12) on an axis, and the other end of the sleeve (31) being fixedly connected to the scraper (6).

4. A sampling method for geological exploration according to claim 3, characterized in that: The surface of the rotating disk (19) is provided with two arc-shaped slots (25), and the surface of the arc-shaped slots (25) is slidably connected to the limiting pillars (23).

5. A sampling method for geological exploration according to claim 4, characterized in that: One end of the limiting column (23) is fixedly connected to the support plate (13), and the other end of the limiting column (23) is fixedly connected to a stopper (24).

6. A sampling method for geological exploration according to claim 3, characterized in that: The auxiliary component comprises a gear 1 (21) fixedly connected to the end of the rotating rod (20), and the inner wall of the sampling tube (1) is slidably connected to two symmetrically arranged rack rows 1 (44), and the surface of the rack row 1 (44) is hinged with a hinge plate (41).

7. A sampling method for geological exploration according to claim 6, characterized in that: An articulated block (38) is hingedly connected to the end of the articulated plate (41), a connecting block is fixedly connected to the upper surface of the articulated block (38), and the articulated block (38) is fixedly connected to the annular baffle (5) via the connecting block.

8. A sampling method for geological exploration according to claim 7, characterized in that: A sliding block (39) is fixedly connected to the surface of the hinge block (38), and a rectangular notch (40) is provided on the inner wall of the sampling tube (1) for the sliding block (39) to extend and slide. The lower surface of the rack row 1 (44) is fixedly connected to a slide block 2 (42), and the inner wall of the sampling tube (1) is provided with a rectangular notch 2 (43) for the slide block 2 (42) to extend and slide.

9. A sampling method for geological exploration according to claim 5, characterized in that: The collecting component comprises a second gear (30) fixedly connected to the surface of the sleeve (31); a fixing plate (34) is fixedly connected to the side of the support plate (13); an electric push rod (28) is fixedly mounted on the surface of the fixing plate (34); and an output end of the electric push rod (28) is fixedly connected to a second rack (27) meshing with the second gear (30).

10. A sampling method for geological exploration according to claim 9, characterized in that: The switching component comprises a rotating shaft (35) fixedly connected to the upper surface of the connecting plate (16), a one-way bearing (36) being provided on the surface of the rotating shaft (35), and the rotating shaft (35) is fixedly connected to a gear three (37) meshing with the rack row two (27) via the one-way bearing (36).

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