A drilling sampling device for geological exploration

Abstract

The present invention belongs to the field of geological sampling technology, and discloses a drilling sampling device for geological exploration operations, including a base and a drilling mechanism; the drilling mechanism includes a support assembly arranged on the base, a driving assembly is arranged on the support assembly, the output end of the driving assembly is connected to a drill rod, the drill rod is drilled into the ground, and a sampling assembly is arranged at one end of the drill rod away from the driving assembly; the sampling assembly includes a sampling tube, the sampling tube is telescopically arranged in the inner cavity of the drill rod, and a closing assembly corresponding to the sampling tube is arranged at the bottom end of the drill rod; the closing assembly includes a plurality of spacers telescopically arranged in the drill rod, and the top of the spacer block is detachably connected to the bottom end of the sampling tube. The sampling process of the present invention is fast and efficient, the sampling process has little disturbance effect on the stratum, the stratum of the target area will not be crushed and mixed during sampling, and the hierarchical structure of the sample can be guaranteed after sampling, so that the sample obtained has a high correspondence with the actual structure of the stratum, providing more detailed and real data support for geological research.

Description

Technical Field

[0001] The invention belongs to the technical field of geological sampling, and in particular relates to a drilling sampling device for geological exploration operations. Background Art

[0002] Drilling sampling refers to the sampling method of obtaining rock and soil samples from deep underground by drilling methods in order to carry out geological exploration, soil analysis, hydrogeological surveys, etc. Therefore, in geological exploration work, drilling sampling equipment is an important tool for obtaining underground rock and soil samples.

[0003] Existing drilling sampling devices generally take samples after drilling to a predetermined depth through a drill rod. Sampling is generally divided into two methods: one is to separate drilling and sampling. After drilling to the corresponding position, a separate sampling device is used to take samples after the drill rod is withdrawn; the other is to integrate drilling and sampling together. After drilling to the specified position, sampling is directly performed through a sampling device integrated in the drill rod. However, both of the above sampling methods have problems: first, the drilling process will cause disturbance to the target stratum, resulting in changes in the physical and chemical properties of the obtained samples, which cannot truly reflect the original soil conditions; at the same time, the samples obtained by the existing sampling device are obtained by crushing the stratum structure of the target area, so that the obtained samples are inconsistent with the actual stratum, and the stratum information cannot be accurately obtained, resulting in deviations between the drilling sampling data and the actual data.

[0004] Therefore, the present application designs a drilling sampling device for geological exploration operations to solve the above-mentioned technical problems. Summary of the invention

[0005] In order to solve the above technical problems, the present invention proposes a drilling sampling device for geological exploration operations.

[0006] To achieve the above object, the present invention provides a drilling sampling device for geological exploration operations, comprising a base, on which a drilling mechanism is arranged, and the bottom end of the drilling mechanism penetrates the base and drills into the ground;

[0007] The drilling mechanism comprises a support assembly arranged on the base, a driving assembly for providing drilling power is arranged on the support assembly, a drill rod is connected to the output end of the driving assembly, the drill rod passes through the base and drills into the ground, and a sampling assembly for sampling is arranged at one end of the drill rod away from the driving assembly;

[0008] The sampling assembly comprises a sampling tube movably arranged in the drill rod, the sampling tube is telescopically arranged in the inner cavity of the drill rod, a sealing assembly is arranged at the bottom end of the drill rod, and the sealing assembly is arranged corresponding to the sampling tube;

[0009] The sealing assembly comprises a plurality of spacer blocks which are telescopically arranged in the drill rod, and the top ends of the spacer blocks are detachably connected to the bottom ends of the sampling tubes.

[0010] Preferably, the drill rod includes a first section of rod transmission-connected to the drive assembly, the end of the first section of rod away from the drive assembly is detachably connected to a plurality of intermediate rods detachably connected end to end in sequence, the bottom end of the intermediate rod at the end is detachably connected to a drill bit, the sampling tube is telescopically arranged in the drill bit, and the dividing block is telescopically arranged in the drill bit.

[0011] Preferably, the drill bit includes a connecting tube detachably connected to the bottom end of the intermediate rod at the end, the bottom end of the connecting tube is detachably connected to a storage tube, the bottom end of the storage tube is provided with a drilling cutter disc, and the dividing block is telescopically provided on the drilling cutter disc.

[0012] Preferably, a sampling motor is provided in the connecting cylinder, the output end of the sampling motor is transmission-connected to a transmission rod, the bottom end of the transmission rod extends into the storage cylinder and is transmission-connected to the transmission cylinder, the inner cavity of the transmission cylinder is threadedly connected to a sampling plate, and the sampling tube is fixedly mounted on the bottom end of the sampling plate.

[0013] Preferably, a support block is provided in the connecting cylinder, a lifting block is sealingly and slidingly connected to the support block, and a plurality of return springs are fixedly connected between the support block and the lifting block; the bottom end of the lifting block passes through the support block and is fixedly connected to a connecting block, a mounting seat is installed at the bottom end of the connecting block, and the sampling motor is fixedly installed on the mounting seat.

[0014] Preferably, a sampling hole corresponding to the sampling tube is provided on the drilling cutter disc, a receiving groove is provided on the side wall of the sampling hole, and a plurality of the partition blocks are arranged in a ring shape in the receiving groove and are in contact with each other; a plurality of partition springs are fixed in the receiving groove, and the partition springs are fixed to the connecting holes on the partition blocks.

[0015] Preferably, the edges of the partition blocks are provided with partition knives, and the partition knives on adjacent partition blocks are correspondingly arranged and contact-connected.

[0016] Preferably, the first section rod is rotatably connected to an air intake box, and a plurality of air intake holes are opened on the first section rod, and the air intake holes are connected to the inner cavity of the air intake box; the air intake holes are connected to an air guide cavity opened in the first section rod, the middle rod and the connecting tube and connected in sequence, and the support block is provided at the bottom end of the air guide cavity and is transmission-connected to the lifting block.

[0017] Preferably, the support assembly includes two support columns fixedly connected to the base, guide grooves are correspondingly provided on opposite surfaces of the two support columns, a mounting plate is slidably connected between the two guide grooves, and the drive assembly is fixedly mounted on the mounting plate.

[0018] Preferably, the driving assembly comprises a driving motor fixedly mounted on the mounting plate, and the output shaft of the driving motor is downwardly disposed and drivingly connected to the top end of the first-section rod.

[0019] Compared with the prior art, the present invention has the following advantages and technical effects: the present invention discloses a drilling sampling device for geological exploration operations. When sampling, the base is first pulled to the sampling position and fixed, and the support component drives the driving component and the drill bit to drill downward to the sampling position, wherein the driving component drives the drill rod to rotate, thereby improving the drilling efficiency, reducing the difficulty of drilling, and reducing the disturbance of the formation during the drilling process; when the end of the drill rod is drilled to the specified position, the hollow sampling tube pushes the closing component and extends out of the drill rod, and cuts and samples the formation position, so that the sample enters the sampling tube completely and in clear layers, and after the sampling is completed, the sampling tube is retracted again, so that the sampling tube cuts the sample and then retracts it into the drill rod, and the partition component is closed at the same time, and finally the drill rod is removed to take out the sample; the closing component is composed of a plurality of telescopic partition blocks, and when the drill rod is drilling, the partition blocks are in contact with each other to prevent external soil from entering and affecting the sampling; and when sampling is performed, after the sampling tube contacts the partition block, the partition block can be conveniently pushed to separate, and it is convenient to extend the sampling without affecting the sampling.

[0020] The sampling process of the present invention is fast and efficient, the sampling process has little disturbance effect on the stratum, the stratum in the target area will not be crushed or mixed during sampling, and the hierarchical structure of the sample can be guaranteed after sampling, so that the obtained sample has a high correspondence with the actual structure of the stratum, providing more detailed and real data support for geological research. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0022] Figure 1 This is an axial view of the drilling sampling device for geological exploration operations of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of the drive assembly of the present invention;

[0024] Figure 3 This is a view of the intermediate rod axis of the present invention;

[0025] Figure 4 It is a schematic diagram of the drill bit structure of the present invention;

[0026] Figure 5 For the present invention Figure 4 A partial enlarged view of middle A;

[0027] Figure 6 For the present invention Figure 4 A partial enlarged view of B in the middle;

[0028] In the figure: 1, base; 2, drill rod; 3, sampling tube; 4, partition block; 5, first section rod; 6, middle rod; 7, drill bit; 8, connecting tube; 9, storage tube; 10, drilling cutter head; 11, isolation cutter head; 12, sampling motor; 13, transmission rod; 14, transmission tube; 15, sampling plate; 16, support block; 17, lifting block; 18, reset spring; 19, connecting block; 20, mounting seat; 21, sampling hole; 22, storage slot; 23, partition spring; 24, connecting hole; 25, dividing knife; 26, air intake box; 27, air intake hole; 28, air guide cavity; 29, air inlet pipe; 30, support column; 31, guide groove; 32, mounting plate; 33, support motor; 34, drive motor; 35, transmission head; 36, transmission groove; 37, sampling knife; 38, connecting head; 39, connecting groove; 40, positioning block; 41, support bearing; 42, stabilizing block; 43, fixing column; 44, collar; 45, telescopic rod; 46, plug rod; 47, bottom plate; 48, support foot; 49, walking wheel; 50, traction ring; 51, limit groove; 52, limit block; 53, anti-rotation block. DETAILED DESCRIPTION

[0029] 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.

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Reference Figure 1-Figure 6 As shown, this embodiment provides a drilling sampling device for geological exploration operations, including a base 1, on which a drilling mechanism is arranged, and the bottom end of the drilling mechanism penetrates the base 1 and drills into the ground;

[0032] The drilling mechanism includes a support assembly arranged on a base 1, a driving assembly for providing drilling power is arranged on the support assembly, a drill rod 2 is connected to the output end of the driving assembly, the drill rod 2 penetrates the base 1 and drills into the ground, and a sampling assembly for sampling is arranged at one end of the drill rod 2 away from the driving assembly;

[0033] The sampling assembly includes a sampling tube 3 movably arranged in the drill rod 2, the sampling tube 3 is telescopically arranged in the inner cavity of the drill rod 2, and a closing assembly is arranged at the bottom end of the drill rod 2, and the closing assembly is arranged corresponding to the sampling tube 3;

[0034] The sealing assembly includes a plurality of partition blocks 4 which are telescopically arranged in the drill rod 2 , and the top end of the partition block 4 is detachably connected to the bottom end of the sampling tube 3 .

[0035] The present invention discloses a drilling sampling device for geological exploration operations. When sampling, the base 1 is first pulled to the sampling position and fixed, and the support component drives the driving component and the drill bit 7 to drill downward to the sampling position, wherein the driving component drives the drill rod 2 to rotate, thereby improving the drilling efficiency, reducing the drilling difficulty, and reducing the disturbance of the formation during the drilling process; when the end of the drill rod 2 drills to the specified position, the hollow sampling tube 3 pushes the sealing component and extends out of the drill rod 2 to cut and sample the formation position, so that the sample is complete. The sampling tube 3 is inserted into the sampling tube 3 in an orderly and clear manner. After the sampling is completed, the sampling tube 3 is retracted again, so that the sampling tube 3 cuts off the sample and then retracts it into the drill rod 2. At the same time, the partition assembly is closed, and finally the drill rod 2 is removed to take out the sample. The closing assembly is composed of a number of telescopic partition blocks 4. When the drill rod 2 is drilling, the partition blocks 4 contact each other to prevent the external soil from entering and affecting the sampling. When sampling is performed, the sampling tube 3 can easily push the partition blocks 4 to separate after contacting the partition blocks 4, so that it is convenient to extend the sampling without affecting the sampling. The sampling process of the present invention is fast and efficient, the sampling process has little disturbance effect on the stratum, the stratum of the target area will not be crushed and mixed during sampling, and the hierarchical structure of the sample can be guaranteed after sampling, so that the sample obtained has a high correspondence with the actual structure of the stratum, providing more detailed and real data support for geological research.

[0036] Furthermore, the base 1 of this embodiment includes a bottom plate 47, and a plurality of supporting legs 48 and a plurality of retractable walking wheels 49 are provided at the bottom end of the bottom plate 47 to facilitate movement and fixation.

[0037] Furthermore, a traction ring 50 is provided at one end of the bottom plate 47 to facilitate the traction and movement of the entire device to a designated position.

[0038] Furthermore, a support bearing 41 is embedded and installed on the bottom plate 47 , and a stabilizing block 42 is detachably connected to the support bearing 41 for stabilizing the drill rod 2 .

[0039] Furthermore, two fixing columns 43 symmetrically arranged about the drill rod 2 are provided on the bottom plate 47, and a collar 44 is fixedly connected to the fixing column 43. A plug rod 46 is installed on the side of the collar 44 facing the drill rod 2 through a telescopic rod 45. The size of the plug rod 46 is adapted to the positioning block 40 on the drill rod 2. When adding or removing intermediate drill rods 2, the positioning block 40 is inserted by the plug rod 46 to fix the drill rod 2.

[0040] In a further optimized solution, the drill rod 2 includes a first section rod 5 that is transmission-connected to the drive assembly, and one end of the first section rod 5 that is away from the drive assembly is detachably connected to a plurality of intermediate rods 6 that are detachably connected in sequence, and the bottom end of the intermediate rod 6 at the end is detachably connected to a drill bit 7, and the sampling tube 3 is telescopically arranged in the drill bit 7, and the partition block 4 is telescopically arranged in the drill bit 7. The first section rod 5, the plurality of intermediate rods 6, and the drill bit 7 are all quickly assembled and disassembled through the connector 38 and the connecting groove 39, and can be installed according to the sampling depth, and can be conveniently stored when not in use; the drill bit 7 is used for drilling, improving the efficiency of drilling, and reducing the disturbance to the formation.

[0041] In a further optimized solution, the drill bit 7 includes a connecting tube 8 detachably connected to the bottom end of the terminal intermediate rod 6, a storage tube 9 detachably connected to the bottom end of the connecting tube 8, a drilling cutter disc 10 is arranged at the bottom end of the storage tube 9, and the partition block 4 is telescopically arranged on the drilling cutter disc 10. A connecting groove 39 is provided at the top end of the connecting tube 8, which is connected to the connecting head 38 of the bottom intermediate rod 6 to realize transmission; the storage tube 9 is fixedly connected to the bottom end of the connecting tube 8 to protect the internal sampling tube 3; and the drilling cutter disc 10 is fixedly connected to the bottom end of the connecting tube 8 to cut the formation structure.

[0042] Furthermore, an isolation cutter disc 11 is provided on the outer wall of the connecting tube 8 to expand the borehole and prevent the top soil and rocks from collapsing and affecting the drilling cutter disc 10 .

[0043] In a further optimized solution, a sampling motor 12 is provided in the connecting tube 8, and the output end of the sampling motor 12 is transmission-connected with a transmission rod 13, and the bottom end of the transmission rod 13 extends into the storage tube 9 and is transmission-connected with a transmission tube 14, and the inner cavity of the transmission tube 14 is threadedly connected with a sampling plate 15, and the sampling tube 3 is fixedly installed at the bottom end of the sampling plate 15. The output shaft of the sampling motor 12 is detachably connected through a transmission head 35 and a transmission slot 36. When sampling is required, the sampling motor 12 drives the transmission tube 14 to rotate through the transmission rod 13, thereby causing the sampling plate 15 to rise and fall in the transmission tube 14, thereby causing the sampling tube 3 to descend and cut the sample through the sampling knife 37 at the bottom end of the sampling tube 3 to perform sampling.

[0044] Furthermore, a rotation-stopping block 53 is provided on the inner wall of the storage cylinder 9 so that the sampling tube 3 can only be raised and lowered but cannot be rotated.

[0045] Further optimization scheme, a support block 16 is arranged in the connection cylinder 8, a lifting block 17 is sealed and slidably connected on the support block 16, and a plurality of reset springs 18 are fixedly connected between the support block 16 and the lifting block 17; the bottom end of the lifting block 17 passes through the support block 16 and is fixedly connected to the connection block 19, and a mounting seat 20 is installed at the bottom end of the connection block 19, and the sampling motor 12 is fixedly installed on the mounting seat 20. When sampling, the lifting block 17 descends, and then drives the mounting seat 20 to descend through the connection block 19, so that the sampling motor 12 descends, drives the transmission cylinder 14 to rotate, and provides power for sampling; and after the sampling is completed, the reset spring 18 drives the lifting block 17 to reset, so that the sampling motor 12 and the transmission rod 13 are separated.

[0046] Further optimization scheme, the drilling cutter disc 10 is provided with a sampling hole 21 corresponding to the sampling tube 3, and the side wall of the sampling hole 21 is provided with a receiving groove 22, and a plurality of partition blocks 4 are arranged in a ring shape in the receiving groove 22 and are in contact with each other; a plurality of partition springs 23 are fixed in the receiving groove 22, and the partition springs 23 are fixed to the connection holes 24 on the partition blocks 4. The sampling hole 21 on the drilling cutter disc 10 is used for the sampling tube 3 to be extended and retracted in and out; the top of the partition block 4 is provided with an arc groove inclined toward the center, and the bottom is arranged horizontally; when the sampling tube 3 descends and contacts the arc groove, the partition block 4 retracts into the receiving groove 22 around it, so that the sampling tube 3 can be extended easily; and when the sampling is completed, the sampling tube 3 is recovered, and the partition spring 23 rebounds to drive the partition block 4 to converge to the center of the sampling hole 21, closing the sampling hole 21 to prevent affecting the sample.

[0047] Furthermore, when the cutter head 10 is drilling, the external soil layer cannot push open the partition block 4 which is horizontally arranged at the bottom.

[0048] Furthermore, a limiting groove 51 is provided in the receiving groove 22 , and the limiting block 52 fixed to the dividing block 4 slides in the limiting groove 51 , thereby improving the stability of the dividing block 4 .

[0049] In a further optimized solution, a dividing knife 25 is provided at the edge of the dividing block 4, and the dividing knives 25 on adjacent dividing blocks 4 are correspondingly provided and contacted and connected. The function of the dividing knife 25 is to cut off the connection between the sample and the formation to prevent the sample from being taken out.

[0050] Further optimization scheme, the first section rod 5 is rotatably connected with an air inlet box 26, and the first section rod 5 is provided with a plurality of air inlet holes 27, and the air inlet holes 27 are connected with the inner cavity of the air inlet box 26; the air inlet holes 27 are connected with the air guide cavity 28 which is provided in the first section rod 5, the middle rod 6 and the connecting tube 8 and connected in sequence, and the bottom end of the air guide cavity 28 is provided with a support block 16 fixedly connected and transmission connected with the lifting block 17. The air inlet box 26 is provided to ventilate the drill rod 2. When sampling is required, the compressed air from the outside is introduced into the air inlet box 26 through the air inlet pipe 29, and the compressed air enters the air guide cavity 28 through the air inlet hole 27, thereby pushing the lifting block 17 down, so that the sampling motor 12 can output power to the outside.

[0051] Further optimizing the scheme, the support assembly includes two support columns 30 fixedly connected to the base 1, and the opposite surfaces of the two support columns 30 are provided with guide grooves 31, and a mounting plate 32 is slidably connected between the two guide grooves 31, and the drive assembly is fixedly mounted on the mounting plate 32. A support motor 33 is arranged at the top of the support column 30, and the output shaft of the support motor 33 extends into the guide groove 31, thereby driving the mounting plate 32 to rise and fall, driving the drive assembly to rise and fall, and assisting drilling.

[0052] In a further optimized solution, the drive assembly includes a drive motor 34 fixedly mounted on the mounting plate 32, and the output shaft of the drive motor 34 is downwardly connected to the top of the first section rod 5. The drive motor 34 drives the drill rod 2 to rotate, thereby achieving drilling.

[0053] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0054] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A drilling sampling device for geological exploration operations, characterized in that: It comprises a base (1), on which a drilling mechanism is arranged, and the bottom end of the drilling mechanism penetrates through the base (1) and drills into the ground; The drilling mechanism comprises a support assembly arranged on the base (1), a driving assembly for providing drilling power being arranged on the support assembly, a drill rod (2) being drivingly connected to the output end of the driving assembly, the drill rod (2) passing through the base (1) and drilling into the ground, and a sampling assembly for sampling being arranged at one end of the drill rod (2) away from the driving assembly; The sampling assembly comprises a sampling tube (3) movably arranged in the drill rod (2), the sampling tube (3) being telescopically arranged in the inner cavity of the drill rod (2), a sealing assembly being arranged at the bottom end of the drill rod (2), and the sealing assembly being arranged corresponding to the sampling tube (3); The sealing assembly comprises a plurality of spacer blocks (4) telescopically arranged in the drill rod (2), and the top end of the spacer block (4) is detachably connected to the bottom end of the sampling tube (3); The drill rod (2) comprises a first section rod (5) drivingly connected to the driving assembly, the first section rod (5) is detachably connected to one end away from the driving assembly with a plurality of intermediate rods (6) detachably connected in sequence end to end, the bottom end of the intermediate rod (6) at the end is detachably connected to a drill bit (7), the sampling tube (3) is telescopically arranged in the drill bit (7), and the partition block (4) is telescopically arranged in the drill bit (7); The drill bit (7) comprises a connecting tube (8) detachably connected to the bottom end of the intermediate rod (6) at the end, the bottom end of the connecting tube (8) is detachably connected to a storage tube (9), the bottom end of the storage tube (9) is provided with a drilling cutter disc (10), and the partition block (4) is telescopically arranged on the drilling cutter disc (10); A sampling motor (12) is arranged in the connecting cylinder (8), the output end of the sampling motor (12) is drivingly connected to a transmission rod (13), the bottom end of the transmission rod (13) extends into the storage cylinder (9) and is drivingly connected to a transmission cylinder (14), the inner cavity of the transmission cylinder (14) is threadedly connected to a sampling plate (15), and the sampling tube (3) is fixedly mounted on the bottom end of the sampling plate (15); The output shaft of the sampling motor (12) is detachably connected via a transmission head (35) and a transmission slot (36); The inner wall of the storage cylinder (9) is provided with a rotation-stopping block (53), so that the sampling tube (3) can only be raised or lowered; A support block (16) is arranged in the connecting tube (8), a lifting block (17) is sealingly and slidingly connected to the support block (16), and a plurality of return springs (18) are fixedly connected between the support block (16) and the lifting block (17); the bottom end of the lifting block (17) passes through the support block (16) and is fixedly connected to a connecting block (19), a mounting seat (20) is installed at the bottom end of the connecting block (19), and the sampling motor (12) is fixedly mounted on the mounting seat (20).

2. The drilling sampling device for geological exploration according to claim 1, characterized in that: The drilling cutter head (10) is provided with a sampling hole (21) corresponding to the sampling tube (3); a side wall of the sampling hole (21) is provided with a receiving groove (22); a plurality of the partition blocks (4) are arranged in a ring shape in the receiving groove (22) and are in contact with each other; a plurality of partition springs (23) are fixedly connected in the receiving groove (22); the partition springs (23) are fixedly connected to the connection holes (24) on the partition blocks (4).

3. The geological exploration drilling sampling device according to claim 2, characterized in that: The edges of the partition blocks (4) are provided with partition knives (25), and the partition knives (25) on adjacent partition blocks (4) are arranged correspondingly and are in contact and connection.

4. The geological exploration drilling sampling device according to claim 1, characterized in that: The first section rod (5) is rotatably connected to an air intake box (26), and a plurality of air intake holes (27) are provided on the first section rod (5). The air intake holes (27) are communicated with the inner cavity of the air intake box (26); the air intake holes (27) are communicated with an air guide cavity (28) which is provided in the first section rod (5), the intermediate rod (6) and the connecting tube (8) and is connected in sequence, and the bottom end of the air guide cavity (28) is provided with the support block (16) and is transmission-connected to the lifting block (17).

5. The geological exploration drilling sampling device according to claim 1, characterized in that: The support assembly comprises two support columns (30) fixedly connected to the base (1); guide grooves (31) are correspondingly provided on opposite surfaces of the two support columns (30); a mounting plate (32) is slidably connected between the two guide grooves (31); and the drive assembly is fixedly mounted on the mounting plate (32).

6. The drilling sampling device for geological exploration according to claim 5, characterized in that: The driving assembly comprises a driving motor (34) fixedly mounted on the mounting plate (32), wherein the output shaft of the driving motor (34) is downwardly directed and drivingly connected to the top end of the first section rod (5).

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