Geological exploration sampling method and sampling device

Abstract

The application discloses a geological exploration sampling method and sampling equipment, which comprises a base, the top end of the base is connected with multiple supporting guide rods, the top end of the multiple supporting guide rods is connected with a top frame, the inner wall of the top frame is provided with an impact mechanism, the bottom end of the impact mechanism is connected with a sampling mechanism, the top end outer wall of the base is provided with a limiting mechanism and a rotating mechanism, the limiting mechanism comprises four supporting frames, the four supporting frames are symmetrical in pairs, and two of the supporting frames are located on the two sides of the impact mechanism, the inner walls of the two supporting frames located on the two sides of the impact mechanism are respectively provided with connecting plates, the central positions of the connecting plates are provided with threaded sleeves, the inner walls of the threaded sleeves are engaged with screws, the bottom ends of the screws are fixedly connected with drill rods, and the outer walls of the drill rods are provided with helical blades. The geological exploration sampling method and sampling equipment have the effect of effectively reducing the weight of the equipment itself while enhancing the fixing stability of the equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of geological exploration sampling, in particular to a geological exploration sampling method and sampling equipment. BACKGROUND

[0002] Geological exploration is an investigation and research activity of exploring and detecting geology by various means and methods, determining foundation types and calculating foundation parameters. Through exploration, industrial deposits are discovered, the quality and quantity of mineral products and the technical conditions for mining and utilization are found out, and the mineral reserves and geological data required for mine design are provided.

[0003] In the exploration process, the most basic step is to take soil samples. Currently, sampling is mainly performed by inserting a sampling tube into the ground to be sampled. During the insertion of the sampling tube, the soil sample to be sampled enters the sampling tube. After the sampling tube is extracted, the soil sample in the sampling tube can be taken out to complete the entire sampling process.

[0004] During the insertion of the sampling tube into the ground, two methods of impact sampling and rotary sampling are generally adopted. The impact sampling method is more commonly used. However, the impact sampling device generally has a high overall weight requirement. In order to ensure the stability of the impact during the impact process, the device needs to have sufficient weight. However, a heavy sampling device is not conducive to movement, thereby increasing the operation difficulty. A sampling device with insufficient weight cannot guarantee the stability of sampling, and the sampling tube may be tilted during the sampling process. SUMMARY

[0005] The present application discloses a geological exploration sampling method and sampling equipment, which aims to solve the technical problem of a heavy sampling device that is not conducive to movement, thereby increasing the operation difficulty, and a sampling device with insufficient weight that cannot guarantee the stability of sampling, which may cause the sampling tube to be tilted during the sampling process.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0007] The utility model provides a geological exploration sampling device, including the base, the top of base is connected with a plurality of support guide rod, the top of a plurality of support guide rod is connected with the top frame, the inner wall of top frame is provided with the impact mechanism, the bottom of impact mechanism is connected with the sampling mechanism, the top outer wall of base is provided with the limiting mechanism and rotating mechanism, the limiting mechanism includes four support frames, four support frames are symmetrical, and two support frames are located in the both sides of impact mechanism, the inner wall of support frame is provided with the connecting plate respectively, and the center position of connecting plate is provided with the threaded sleeve, the inner wall of threaded sleeve is engaged with screw rod, the bottom of screw rod is fixedly connected with the drill rod, and the outer wall of drill rod is provided with the spiral piece, the top of screw rod is connected with the clamping block, the outside of screw rod is provided with the sleeve, and the inner wall of sleeve is provided with the clamping groove, the clamping block is movably clamped in the clamping groove, the top of sleeve is provided with the first synchronous wheel, the top of two support frames is provided with double synchronous wheel, and the bottom of one double synchronous wheel is connected with the first stepper motor, the outer wall of two double synchronous wheels is connected with the synchronous belt simultaneously, and the outer wall of double synchronous wheel and first synchronous wheel is connected with the second synchronous belt simultaneously.

[0008] Through the limiting mechanism, when the base is fixed, the first stepper motor is started, the sleeve is driven to rotate under the action of double synchronous wheel, synchronous belt, second synchronous belt and first synchronous wheel, so that the movement path of screw rod becomes downward rotation, the drill rod and spiral piece are driven to rotate and drill into the ground, after deepening, the spiral piece is clamped in the ground to limit, avoiding shaking of impact mechanism when downward impacting, affecting the sampling direction of sampling mechanism, the fixing stability is ensured by using spiral piece limiting instead of pressing by the weight of the equipment, so that the weight of the equipment is effectively reduced and the fixing stability of the equipment is enhanced.

[0009] In a preferred scheme, the inner wall of the top of the base is provided with two square holes, and the two square holes are symmetrically arranged, two square holes are located below the drill rod, the impact mechanism includes an impact cylinder, and the impact cylinder is arranged in the inner wall of the top frame, the bottom of the impact cylinder is fixedly connected with the impact block, the inner wall of the bottom of the impact block is provided with an electromagnetic sheet, the impact block is connected with an iron block through the electromagnetic sheet, the bottom of the iron block is fixedly connected with a threaded sleeve, the outer wall of the iron block is connected with a plurality of limiting frames at equal density, and the plurality of limiting frames are sleeved on the plurality of support guide rods.

[0010] By setting the electromagnetic sheet, iron block and limiting frame, when the impact mechanism impacts the sampling mechanism downward, the iron block is limited by the plurality of limiting frames sleeved on the support guide rod, so as to avoid displacement of the sampling mechanism during the impacting process, and the sampling mechanism can be pulled out under the action of the electromagnetic sheet by adjusting the impacting force of the impact cylinder, so as to realize multifunctional operation.

[0011] In a preferred scheme, the sampling mechanism comprises a sampling tube, and the outer wall of the sampling tube is provided with a plurality of convex strips with equal density, the top end of the sampling tube is connected with a first threaded inner sleeve, the bottom end of the sampling tube is connected with a second threaded inner sleeve, the first threaded inner sleeve is engaged in the inside of the threaded connecting sleeve, the outer wall of the second threaded inner sleeve is engaged with a drill pipe, the first threaded inner sleeve, the sampling tube and the second threaded inner sleeve are simultaneously divided into two pieces from the symmetry axis, the rotating mechanism comprises a second support frame, the second support frame is located at the top end of the base, the inside of the second support frame is provided with a gear, the top end of the gear is connected with a second stepping motor, the outer wall of the gear is engaged with an arc-shaped rack, the bottom end of the arc-shaped rack is connected with a sliding block, the top end inner wall of the base is provided with a sliding groove, the sliding block is located in the inside of the sliding groove, and the outer wall of one side of the arc-shaped rack is connected with a pneumatic clamp;

[0012] A geological exploration sampling method comprises the following specific steps:

[0013] S1: Assemble the sampling mechanism: assemble the two pieces of sampling tube, and threadedly connect the threaded connecting sleeve and the drill pipe by using the first threaded inner sleeve and the second threaded inner sleeve;

[0014] S2: Start the limiting mechanism: after the sampling mechanism is assembled, the fixing of the base is performed by driving the two spiral pieces to penetrate into the ground by starting the first stepping motor;

[0015] S3: Add water for permeation: determine whether the sampling position is dry, and after it is determined that the soil is dry and has a large hardness, water is added to the geological surface layer to soften the soil;

[0016] S4: Start the impact mechanism: set the impact value of the impact cylinder, and start the impact cylinder to repeatedly impact the iron block, so that the sampling tube penetrates into the ground for sampling;

[0017] S5: Rotate the sampling mechanism: start the pneumatic clamp to clamp the outer wall of the sampling mechanism, and then start the second stepping motor to drive the pneumatic clamp to reciprocate at a small amplitude along the direction of the sliding groove, so that the surrounding soil is loosened;

[0018] S6: Extract the sampling tube: reduce the impact speed of the impact cylinder, and turn on the power supply of the electromagnetic sheet to magnetically connect the iron block, and drive the sampling mechanism to move upward and separate from the ground in the reciprocating motion;

[0019] S7: Take out the sample: remove the sampling tube, then remove the threaded connecting sleeve and the drill pipe, and take out the sample in the sampling tube

[0020] By setting up rotating mechanism and convex strip, when extracting sampling tube, through starting second step motor, through pneumatic clamping sampling tube carries on small distance reciprocating rotation, under the action of convex strip, the convex strip under the soil acts on the surrounding soil, thereby reducing the required force when extracting sampling tube, playing the effect of guaranteeing the service life of impact cylinder and improving the extraction efficiency of sampling tube.

[0021] From the above, a geological exploration sampling device, including base, the top of the base is connected with a plurality of support guide rod, a plurality of the top of the support guide rod is connected with the top frame, the inner wall of the top frame is provided with impact mechanism, the bottom of the impact mechanism is connected with sampling mechanism, the top outer wall of the base is provided with limiting mechanism and rotating mechanism, the limiting mechanism includes four support frame, four the support frame is symmetrical, and two of the support frame is located on both sides of the impact mechanism, the inner wall of the support frame located on both sides of the impact mechanism is provided with connecting plate, and the center position of the connecting plate is provided with threaded sleeve, the inner wall of the threaded sleeve is engaged with screw rod, the bottom of the screw rod is fixedly connected with drill rod, and the outer wall of the drill rod is provided with spiral blade, the top of the screw rod is connected with the clamping block, the outer of the screw rod is provided with sleeve, and the inner wall of the sleeve is provided with clamping groove, the clamping block is movably clamped in the clamping groove, the top of the sleeve is provided with first synchronous wheel, the top of the sleeve is provided with first synchronous wheel, the top of the sleeve is provided with first synchronous wheel, and the bottom of one of the double synchronous wheels is connected with first step motor, the outer wall of the two double synchronous wheels is connected with synchronous belt, and the outer wall of the double synchronous wheel and the first synchronous wheel is connected with second synchronous belt. The geological exploration sampling method and the sampling device provided by the application have the technical effect of effectively reducing the weight of the device itself while strengthening the fixing stability of the device. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The overall structure of the geological exploration sampling device is provided.

[0023] Figure 2 The limiting mechanism structure diagram of the geological exploration sampling device is provided.

[0024] Figure 3 The limiting mechanism structure diagram of the geological exploration sampling device is provided.

[0025] Figure 4 The rotating mechanism structure diagram of the geological exploration sampling device is provided.

[0026] Figure 5 The impact mechanism split structure diagram of the geological exploration sampling device is provided.

[0027] Figure 6A sampling mechanism split structure schematic view of a geological exploration sampling device is provided for the present application.

[0028] Figure 7 A whole flow chart of a geological exploration sampling method is provided for the present application.

[0029] In the figure: 1, support guide rod; 2, top frame; 3, impact mechanism; 4, limiting mechanism; 5, base; 6, rotating mechanism; 7, sampling mechanism; 8, support frame; 9, first synchronous wheel; 10, synchronous belt; 11, double synchronous wheel; 12, second synchronous belt; 13, first stepping motor; 14, helical blade; 15, square hole; 16, connecting plate; 17, threaded sleeve; 18, drill rod; 19, screw rod; 20, clamping block; 21, clamping groove; 22, sleeve; 23, second stepping motor; 24, second support frame; 25, gear; 26, arc-shaped rack; 27, sliding block; 28, sliding groove; 29, pneumatic clamp; 30, impact cylinder; 31, impact block; 32, electromagnetic sheet; 33, limiting frame; 34, iron block; 35, threaded connecting sleeve; 36, first threaded inner sleeve; 37, convex strip; 38, sampling pipe; 39, second threaded inner sleeve; 40, drill pipe. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments.

[0031] The geological exploration sampling method and sampling device disclosed by the present application are mainly applied to the scene of geological exploration sampling.

[0032] Reference Figures 1-3The utility model provides a geological exploration sampling device, including the base 5, the top of base 5 is connected with a plurality of support guide rod 1, the top of a plurality of support guide rod 1 is connected with top frame 2, the inner wall of top frame 2 is provided with impact mechanism 3, the bottom of impact mechanism 3 is connected with sampling mechanism 7, the top outer wall of base 5 is provided with limiting mechanism 4 and rotating mechanism 6, limiting mechanism 4 includes four support frame 8, four support frame 8 is symmetrical, and two of them are located on the both sides of impact mechanism 3, the inner wall of support frame 8 located on the both sides of impact mechanism 3 is provided with connecting plate 16 respectively, and the central position of connecting plate 16 is provided with threaded sleeve 17, the inner wall of threaded sleeve 17 is engaged with screw rod 19, the bottom of screw rod 19 is fixedly connected with drill rod 18, and the outer wall of drill rod 18 is provided with helical blade 14, the top of screw rod 19 is connected with clamping block 20, the outside of screw rod 19 is provided with sleeve 22, and the inner wall of sleeve 22 is provided with clamping groove 21, clamping block 20 is movably clamped in clamping groove 21, the top of sleeve 22 is provided with first synchronous wheel 9, the top of other two support frame 8 is provided with double synchronous wheel 11, and the bottom of one of double synchronous wheel 11 is connected with first stepping motor 13, the outer wall of two double synchronous wheel 11 is simultaneously connected with synchronous belt 12, and the outer wall of double synchronous wheel 11 and first synchronous wheel 9 is simultaneously connected with second synchronous belt 10, when fixing base 5, by starting first stepping motor 13, under the action of double synchronous wheel 11, synchronous belt 10, second synchronous belt 12 and first synchronous wheel 9, sleeve 22 is driven to rotate, and under the connecting structure that clamping block 20 is clamped in the inner wall of clamping groove 21 and the outer wall of screw rod 19 is engaged with threaded sleeve 17, the movement path of screw rod 19 is downward rotation, thereby driving drill rod 18 and helical blade 14 to rotate and drill into the ground, after deepening, based on the limit that helical blade 14 is clamped in the ground, avoid shaking when impact mechanism 3 is impacted downward, influence sampling direction of sampling mechanism 7, by the limit of helical blade 4, the fixing stability is guaranteed, instead of being suppressed by the weight of the equipment itself, so that the fixing stability of the equipment can be enhanced while effectively reducing the weight of the equipment.

[0033] Referring to Figure 2 In a preferred embodiment, the top inner wall of the base 5 is provided with two square holes 15, and the two square holes 15 are symmetrically arranged, and the two square holes 15 are located directly below the drill rod 18.

[0034] Referring to Figure 5 In a preferred embodiment, the impact mechanism 3 includes an impact cylinder 30, and the impact cylinder 30 is arranged on the inner wall of the top frame 2, the bottom of the impact cylinder 30 is fixedly connected with an impact block 31, and the bottom inner wall of the impact block 31 is provided with an electromagnetic sheet 32.

[0035] Referring to Figure 1 And Figure 5In a preferred embodiment, the impact block 31 is connected with the iron block 34 through the electromagnetic sheet 32, the bottom end of the iron block 34 is fixedly connected with the threaded connecting sleeve 35, the outer wall of the iron block 34 is equally densely connected with a plurality of limiting racks 33, and the plurality of limiting racks 33 are sleeved on the plurality of supporting guide rods 1. When the impact mechanism 3 impacts downwardly on the sampling mechanism 7, the plurality of limiting racks 33 are sleeved on the supporting guide rods 1, so as to limit the iron block 34, avoid displacement of the sampling mechanism 7 in the impact process, and tightly adsorb the iron block 34 through energization of the electromagnetic sheet 32, so that the sampling mechanism 7 can be pulled out under the action of the electromagnetic sheet 32 by adjusting the impact force of the impact cylinder 30, and multifunctional operation is realized.

[0036] Referring to Figure 6 In a preferred embodiment, the sampling mechanism 7 comprises a sampling pipe 38, and the outer wall of the sampling pipe 38 is equally densely provided with a plurality of convex strips 37. The top end of the sampling pipe 38 is connected with a first threaded inner sleeve 36, and the bottom end of the sampling pipe 38 is connected with a second threaded inner sleeve 39.

[0037] Referring to Figure 6 In a preferred embodiment, the first threaded inner sleeve 36 is engaged in the inside of the threaded connecting sleeve 35, the outer wall of the second threaded inner sleeve 39 is engaged with a drill pipe 40, and the first threaded inner sleeve 36, the sampling pipe 38 and the second threaded inner sleeve 39 are simultaneously divided into two pieces from a symmetric axis.

[0038] Referring to Figure 4 In a preferred embodiment, the rotating mechanism 6 comprises a second supporting frame 24, the second supporting frame 24 is located at the top end of the base 5, the inside of the second supporting frame 24 is provided with a gear 25, and the top end of the gear 25 is connected with a second stepping motor 23.

[0039] Referring to Figure 4 In a preferred embodiment, the outer wall of the gear 25 is engaged with an arc-shaped rack 26, the bottom end of the arc-shaped rack 26 is connected with a sliding block 27, the top end inner wall of the base 5 is provided with a sliding groove 28, the sliding block 27 is located in the inside of the sliding groove 28, and one side outer wall of the arc-shaped rack 26 is connected with a pneumatic clamp 29.

[0040] Referring to Figure 7 A geological exploration sampling method comprises the following specific steps:

[0041] S1: Assembling the sampling mechanism: two pieces of the sampling pipe 38 are closed, and the first threaded inner sleeve 36 and the second threaded inner sleeve 39 are threadedly connected with the threaded connecting sleeve 35 and the drill pipe 40;

[0042] S2: Starting the limiting mechanism: after the sampling mechanism 7 is assembled, the first stepping motor 13 is started to drive the two sides of the helical blade 14 to penetrate into the ground to fix the base 5;

[0043] S3: Water infiltration: determine whether the sampling position is dry, determine the dry soil, the hardness is larger, add water to the surface of the earth, soften the soil;

[0044] S4: Start the impact mechanism: set the impact value of the impact cylinder 30, and start the impact cylinder 30, so that it repeatedly impacts the iron block 34, so that the sampling pipe 38 penetrates into the underground to sample;

[0045] S5: Rotate the sampling mechanism: start the pneumatic clamp 29 to clamp the outer wall of the sampling mechanism 7, and then start the second stepper motor 23 to drive the pneumatic clamp 29 to rotate along the direction of the chute 28 with a small amplitude, so as to loosen the surrounding soil;

[0046] S6: Extract the sampling pipe: reduce the impact speed of the impact cylinder 30, and turn on the power of the electromagnetic sheet 32 to connect the iron block 34, and drive the sampling mechanism 7 to move away from the ground in reciprocating motion;

[0047] S7: Take out the sample: remove the sampling pipe 38, then remove the threaded sleeve 35 and the drill pipe 40, and take out the sample in the sampling pipe 38. When extracting the sampling pipe 38, start the second stepper motor 23 to rotate the gear 25, and drive the arc rack 26 engaged with the gear 25 to rotate along the chute 28 with a small distance around the center axis of the sampling mechanism 7, and then drive the sampling pipe 38 to rotate with a small distance through the pneumatic clamp 29. Under the action of the convex strip 37, the convex strip 37 under the soil acts on the surrounding soil, thereby reducing the required force when extracting the sampling pipe 38, and prolonging the service life of the impact cylinder 30 and improving the extraction efficiency of the sampling pipe 38.

[0048] Working principle: when the sampling work is prepared, the two sampling tubes 38 are closed, the first threaded inner sleeve 36 and the second threaded inner sleeve 39 are used to threadedly connect the sleeve 35 and the drill pipe 40 to complete the installation of the sampling tube 38, and the limiting mechanism 4 is used to fix the base 5, when the base 5 is fixed, the first stepping motor 13 is started, the double synchronous pulley 11, the synchronous belt 10, the second synchronous belt 12 and the first synchronous pulley 9 are used to drive the sleeve 22 to rotate, further, based on the screw rod 19 being clamped on the inner wall of the clamping groove 21 through the clamping block 20, and the outer wall of the screw rod 19 being engaged with the threaded sleeve 17, so that the movement path of the screw rod 19 is downward rotation, thereby driving the drill rod 18 and the spiral blade 14 to rotate and drill into the ground, after deepening, the spiral blade 14 is clamped in the ground to limit, avoiding the shaking of the impact mechanism 3 when impacting downward, affecting the sampling direction of the sampling mechanism 7, the spiral blade 4 is used to limit the fixing stability, instead of using the weight of the equipment itself to press, so that the weight of the equipment itself can be effectively reduced while the fixing stability of the equipment is enhanced, after the base 5 is fixed, the impact cylinder 30 is started to repeatedly impact the iron block 34, so that the sampling tube 38 is deeply drilled into the ground for sampling, before the sampling tube 38 is extracted, the second stepping motor 23 is started to drive the gear 25 to rotate, and the arc-shaped rack 26 engaged with the gear 25 is driven to rotate along the sampling mechanism 7 as the center shaft along the sliding groove 28 for a small distance, and then the pneumatic clamp 29 is driven to rotate the sampling tube 38 for a small distance, under the action of the convex strip 37, the convex strip 37 under the soil acts on the surrounding soil, so that the required force when the sampling tube 38 is extracted is reduced, then the impact speed of the impact cylinder 30 is reduced, the power supply of the electromagnetic sheet 32 is turned on, the iron block 34 is connected through magnetism, and the sampling mechanism 7 is driven to move upward and away from the ground in the reciprocating motion, so that the sampling work is completed.

[0049] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A geological exploration sampling device comprising a base (5), characterised in that, The top end of the base (5) is connected with a plurality of support guide rods (1), the top end of the plurality of support guide rods (1) is connected with a top frame (2), the inner wall of the top frame (2) is provided with an impact mechanism (3), the bottom end of the impact mechanism (3) is connected with a sampling mechanism (7), the top end outer wall of the base (5) is provided with a limiting mechanism (4) and a rotating mechanism (6), the limiting mechanism (4) comprises four support frames (8), the four support frames (8) are symmetrically arranged in pairs, and two of the support frames (8) are located on the two sides of the impact mechanism (3), the inner walls of the support frames (8) located on the two sides of the impact mechanism (3) are respectively provided with connecting plates (16), and the central positions of the connecting plates (16) are provided with threaded sleeves (17), the inner walls of the threaded sleeves (17) are engaged with screw rods (19), the bottom ends of the screw rods (19) are fixedly connected with drill rods (18), and the outer walls of the drill rods (18) are provided with helical blades (14), the top ends of the screw rods (19) are connected with clamping blocks (20), the outer portions of the screw rods (19) are provided with sleeves (22), the inner walls of the sleeves (22) are provided with clamping grooves (21), the clamping blocks (20) are movably clamped in the clamping grooves (21), the top end of the sleeve (22) is provided with a first synchronous wheel (9), the top ends of the other two support frames (8) are provided with double synchronous wheels (11), and the bottom end of one of the double synchronous wheels (11) is connected with a first stepping motor (13), the outer walls of the two double synchronous wheels (11) are simultaneously connected with a synchronous belt (12), and the outer walls of the double synchronous wheels (11) and the first synchronous wheel (9) are simultaneously connected with a second synchronous belt (10).

2. A geological exploration sampling device according to claim 1, wherein, The top end inner wall of the base (5) is provided with two square holes (15), and the two square holes (15) are symmetrically arranged, and the two square holes (15) are located directly below the drill rod (18).

3. A geological exploration sampling device according to claim 1, wherein, The impact mechanism (3) comprises an impact air cylinder (30), and the impact air cylinder (30) is arranged on the inner wall of the top frame (2), the bottom end of the impact air cylinder (30) is fixedly connected with an impact block (31), and the bottom end inner wall of the impact block (31) is provided with an electromagnetic sheet (32).

4. A geological exploration sampling device according to claim 3, wherein, The impact block (31) is connected with an iron block (34) through the electromagnetic sheet (32), the bottom end of the iron block (34) is fixedly connected with a threaded connecting sleeve (35), the outer wall of the iron block (34) is connected with a plurality of limiting frames (33) at equal densities, and the plurality of limiting frames (33) are sleeved on the plurality of support guide rods (1).

5. A geological exploration sampling device according to claim 4, wherein, The sampling mechanism (7) comprises a sampling pipe (38), and the outer wall of the sampling pipe (38) is provided with a plurality of convex strips (37) at equal densities, the top end of the sampling pipe (38) is connected with a first threaded inner sleeve (36), and the bottom end of the sampling pipe (38) is connected with a second threaded inner sleeve (39).

6. A geological exploration sampling device according to claim 5, wherein, The first threaded inner sleeve (36) is engaged in the inside of the threaded connecting sleeve (35), the outer wall of the second threaded inner sleeve (39) is engaged with a drill pipe (40), and the first threaded inner sleeve (36), the sampling pipe (38) and the second threaded inner sleeve (39) are simultaneously divided into two pieces from the symmetry axis.

7. A geological exploration sampling device according to claim 6, wherein, The rotating mechanism (6) comprises a second support frame (24) located at the top end of the base (5), and a gear (25) is arranged in the second support frame (24), and the top end of the gear (25) is connected with a second stepping motor (23).

8. A geological exploration sampling device according to claim 7, wherein, An arc-shaped rack (26) is engaged with the outer wall of the gear (25), the bottom end of the arc-shaped rack (26) is connected with a sliding block (27), the top end inner wall of the base (5) is provided with a sliding groove (28), the sliding block (27) is located in the sliding groove (28), and the outer wall of one side of the arc-shaped rack (26) is connected with a pneumatic clamp (29).

9. A method of geological exploration sampling, applied to a geological exploration sampling device according to claim 8, characterized in that, The method comprises the following specific steps: S1: Assembling the sampling mechanism: two sampling tubes (38) are closed, and the threaded sleeve (35) and the drill pipe (40) are threadedly connected by the first threaded inner sleeve (36) and the second threaded inner sleeve (39); S2: Starting the limiting mechanism: after the sampling mechanism (7) is assembled, the first stepping motor (13) is started to drive the helical blades (14) on both sides to penetrate into the ground to fix the base (5); S3: Adding water for permeation: determining whether the sampling position is dry, and after determining that the soil is dry and has a large hardness, water is added to the surface layer of the soil to soften the soil; S4: Starting the impact mechanism: setting the impact value of the impact cylinder (30) and starting the impact cylinder (30) to repeatedly impact the iron block (34) to make the sampling tube (38) penetrate into the ground for sampling; S5: Rotating the sampling mechanism: starting the pneumatic clamp (29) to clamp the outer wall of the sampling mechanism (7), and then starting the second stepping motor (23) to drive the pneumatic clamp (29) to rotate back and forth along the direction of the sliding groove (28) at a small amplitude to loosen the surrounding soil; S6: Extracting the sampling tube: reducing the impact speed of the impact cylinder (30) and turning on the power of the electromagnetic sheet (32) to connect the iron block (34) and drive the sampling mechanism (7) to move upward and separate from the ground in reciprocating motion; S7: Taking out the sample: removing the sampling tube (38), then removing the threaded connection sleeve (35) and the drill pipe (40), and taking out the sample in the sampling tube (38).

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