Rotary-cut sampling device for geological mineral resource exploration

Abstract

The invention discloses a geological mineral resource exploration rotary-cut sampling device, and belongs to the field of geological mineral resource exploration equipment.The sampling device comprises a rack, a driving shaft rotationally arranged on the rack and a rotary-cut assembly arranged at the lower end of the driving shaft, and the bottom of the driving shaft is sleeved with a sampling cylinder fixedly connected with the rack; an annular feeding groove is formed between the lower end of the sampling cylinder and the rotary cutting assembly; a spiral material guide mechanism is arranged in the annular feeding groove and comprises a spiral blade which is fixedly arranged on the driving shaft in a sleeving manner and extends into the sampling cylinder; the spiral material guiding mechanism further comprises a material guiding sleeve rotationally arranged on the sampling barrel in a sleeving mode, the rotating direction of the material guiding sleeve is opposite to that of the spiral blade, and a spiral groove is formed in the material guiding sleeve. A forced material guiding channel is formed through reverse rotation of double helixes, the problems that a single helix is prone to blockage and a straight cylinder centrifugal type is low in efficiency are solved, directional conveying and continuous collection of rock debris are achieved, the completeness of a sample layer sequence is guaranteed, and the sampling reliability of a complex stratum is improved.

Description

Technical Field

[0001] This application relates to the technical field of geological and mineral resources exploration equipment, and specifically to a rotary cutting sampling device for geological and mineral resources exploration. Background Art

[0002] In the field of geological and mineral exploration, a rotary cutting sampling device is a key equipment for obtaining rock layer samples.

[0003] Conventional sampling cylinders are mostly of single - helix or straight - cylinder structures. Single - helix feeding is prone to rock debris blockage in strata with developed fractures or hard - soft interfaces. Especially when the rock debris particles vary greatly, the accumulation of fine particles will block the channel; straight - cylinder sampling relies on the centrifugal force of the drill bit rotation to transport rock debris, lacking a forced feeding mechanism, resulting in discontinuous sample collection or disordered stratification, affecting the accuracy of subsequent geological analysis.

[0004] Therefore, this application provides a rotary cutting sampling device for geological and mineral resources exploration to solve the above problems. Summary of the Invention

[0005] This application provides a rotary cutting sampling device for geological and mineral resources exploration, aiming to solve the problems in the background art that the existing single - helix feeding mechanism is prone to blockage in complex strata and the sample stratification is prone to disorder, and the straight - cylinder centrifugal structure has low feeding efficiency and poor sample integrity.

[0006] To achieve the above object, this application provides the following technical solution: A rotary cutting sampling device for geological and mineral resources exploration, including a frame, a drive shaft rotatably arranged on the frame, and a rotary cutting assembly arranged at the lower end of the drive shaft. A drilling motor is fixedly installed at the upper end of the frame, and the output end of the drilling motor is fixedly connected to the upper end shaft of the drive shaft. A sampling cylinder fixedly connected to the frame is sleeved at the bottom of the drive shaft, and an annular feeding groove is formed between the lower end of the sampling cylinder and the rotary cutting assembly; To prevent rock debris from blocking the annular feeding groove: A spiral feeding mechanism is arranged in the annular feeding groove. The spiral feeding mechanism includes a spiral blade fixedly sleeved on the drive shaft and extending into the sampling cylinder for transporting the rock debris in the annular feeding groove into the sampling cylinder; The spiral feeding mechanism also includes a guide sleeve rotatably sleeved on the sampling cylinder and a driving member for driving the guide sleeve to rotate. The spiral direction of the guide sleeve is opposite to that of the spiral blade, and a spiral groove for transporting the rock debris at the top into the annular feeding groove is formed on the guide sleeve. When collecting rock debris, the drive shaft drives the right - hand spiral blade to rotate clockwise, and at the same time, the left - hand guide sleeve is driven by the driving member to rotate counter - clockwise. Their spiral directions are opposite, forming a double - helix channel in the annular feeding groove. Using the axial thrust of the spiral blade and the guiding of the spiral groove of the guide sleeve, the rock debris is forcibly transported from the top down into the sampling cylinder, avoiding blockage and stratification disorder caused by centrifugal force or particle differences.

[0007] Preferably, in order to facilitate docking the cuttings in the sampling cylinder: the spiral blade is designed with variable pitch, the pitch is larger at the end close to the rotary cutting assembly, and gradually decreases at the end close to the sampling cylinder. Through the design of gradually changing pitch, it adapts to the conveying requirements of cuttings with different particle sizes, improves the conveying efficiency of large cuttings, and at the same time conducts layered compaction on the soft rock samples, reduces the particle gaps, protects the original structure of the samples, and improves the accuracy of subsequent geological analysis.

[0008] Preferably, in order to reduce the use of the driving source: the driving member includes a transmission gear fixedly sleeved on the driving shaft, a driven gear rotatably installed on the frame and meshed with the transmission gear, and an internal tooth ring fixedly embedded on the material guiding sleeve and meshed with the driven gear. Utilize the power of the driving shaft to realize the reverse rotation of the material guiding sleeve through gear transmission, without an additional driving source, simplifies the device structure, reduces energy consumption, and at the same time ensures that the spiral blade and the material guiding sleeve rotate in opposite directions, forming a stable double - spiral material guiding system.

[0009] Preferably, in order to facilitate removing the sample from the sampling cylinder: the sampling cylinder is of eccentric and different - diameter tubular shape, the large - diameter end at the bottom of the sampling cylinder is coaxial with the driving shaft, and a collecting cylinder is threadedly sleeved on the small - diameter end at the top of the sampling cylinder. Through the eccentric and different - diameter tubular design and the extrusion effect of the spiral material guiding mechanism, it guides the cuttings to move along the inner wall towards the collecting cylinder. The thread - connected collecting cylinder is convenient for quick disassembly, avoids the layer sequence damage and cuttings spilling when the sample is poured, and improves the sampling efficiency and sample integrity.

[0010] Preferably, in order to facilitate driving the collecting cylinder to rotate: a plurality of convex ribs are circumferentially fixedly connected to the outer wall of the end of the collecting cylinder close to the sampling cylinder. The circumferential convex ribs increase the friction force between the hand and the collecting cylinder, facilitating quickly screwing the collecting cylinder during field operations, realizing the efficient disassembly of the sample, and improving the operation convenience.

[0011] Preferably, in order to be able to achieve adaptive cutting of the rock formation hardness: the rotary cutting assembly includes a hollow cylindrical cutter head fixedly connected to the lower end of the driving shaft, a plurality of mounting grooves are circumferentially formed on the cutter head, a swing - type rotary cutting arm is rotatably arranged in the mounting groove, two inclined blades are fixedly installed on the arm, a torsion spring shaft fixedly connected to the cutter head is elastically sleeved on the rotating shaft rod of the arm, and a cam disk adapted to the end of the arm away from the blade is fixedly arranged in the middle of the cutter head. Through the cooperation of the swing - type cutting arm and the cam disk, it realizes the adaptive cutting of the rock formation hardness. When cutting hard rock, it increases the cutting angle to enhance the cutting force; when cutting soft rock, it cuts at a small angle to protect the original state of the sample, improving the sampling efficiency and sample quality in complex strata.

[0012] Preferably, in order to reduce borehole collapse: the sampling device further includes a drilling mechanism arranged at the lower end of the cutter head. The drilling mechanism includes a conical drill bit arranged at the lower end of the cutter head through an elastic member. An arc-shaped guiding edge with a gradually expanding spiral shape is fixedly arranged on the conical drill bit. By combining impact crushing and rotary cutting sampling, it is suitable for stable drilling in rock strata with developed fissures. At the same time, the risk of borehole collapse is reduced through variable diameter design.

[0013] Preferably, the elastic member is fixedly connected to a limit sleeve in the middle of the lower end of the cutter head. A T-shaped block penetrating through the lower end thereof is arranged inside the limit sleeve. The lower end of the T-shaped block is fixedly connected to the upper end of the conical drill bit. A spring fixedly connected to the upper end of the T-shaped block is arranged inside the limit sleeve. The conical drill bit can move up and down through the spring, reducing the impact force of the conical drill bit on the cutter head.

[0014] In this application, a forced feeding channel is formed by the reverse rotation of two spirals, solving the problems of easy blockage of a single spiral and low efficiency of a straight cylinder centrifugal type, realizing the directional transportation and continuous collection of cuttings, ensuring the integrity of the sample sequence, and improving the reliability of sampling in complex strata.

[0015] In this application, through the eccentric variable diameter tubular design and the extrusion action of the spiral feeding mechanism, the cuttings are guided to move along the inner wall towards the collection cylinder. The thread-connected collection cylinder is convenient for quick disassembly, avoiding the sequence damage and cuttings spillage during sample dumping, and improving the sampling efficiency and sample integrity.

[0016] In this application, through the cooperation of the swingable cutter arm and the cam disc, the self-adaptive cutting of the rock stratum hardness is realized. When cutting hard rock, the cutting angle is increased to improve the cutting force. When cutting soft rock, it cuts in at a small angle to protect the original state of the sample, improving the sampling efficiency and sample quality in complex strata.

[0017] In this application, by combining elastic buffering and variable diameter hole expanding design, the risk of borehole collapse is reduced, and it is suitable for stable drilling in rock strata with developed fissures. At the same time, the impact energy is absorbed by the spring to protect the cutter head and the drive shaft, and the service life of the equipment is extended. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of a rotary cutting sampling device for geological and mineral resources exploration; Figure 2 It is Figure 1 a schematic diagram of the other side of the structure in Figure 3 It is a schematic bottom view of a rotary cutting sampling device for geological and mineral resources exploration; Figure 4 It is a structural sectional view of the feeding sleeve and the sampling cylinder; Figure 5 It is a schematic structural diagram of the rotary cutting assembly; Figure 6It is a schematic structural diagram of a drilling mechanism.

[0019] In the figure: 1. Frame; 2. Drive shaft; 3. Rotary cutting assembly; 31. Cutter head; 32. Installation groove; 33. Cutter arm; 34. Blade; 35. Torsion spring shaft; 36. Cam disc; 4. Drilling motor; 5. Sampling cylinder; 51. Collection cylinder; 511. Convex rib; 6. Spiral feeding mechanism; 61. Spiral blade; 62. Feeding sleeve; 63. Driving part; 631. Driving gear; 632. Driven gear; 633. Internal gear ring; 64. Spiral groove; 7. Drilling mechanism; 71. Taper bit; 72. Arc guiding edge; 73. Limit sleeve; 74. T-shaped block; 75. Spring. Specific implementation mode

[0020] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0021] Embodiment 1 This embodiment provides a rotary cutting sampling device for geological and mineral resources exploration, as Figures 1-6As shown in the figure, the sampling device includes a frame 1, a drive shaft 2 rotatably arranged on the frame 1, and a rotary cutting assembly 3 arranged at the lower end of the drive shaft 2. A drilling motor 4 is fixedly installed at the upper end of the frame 1, and the output end of the drilling motor 4 is fixedly connected to the upper end shaft of the drive shaft 2. A sampling cylinder 5 fixedly connected to the frame 1 is sleeved at the bottom of the drive shaft 2, and an annular feeding groove is formed between the lower end of the sampling cylinder 5 and the rotary cutting assembly 3; a spiral feeding mechanism 6 is arranged in the annular feeding groove. The spiral feeding mechanism 6 includes a spiral blade 61 fixedly sleeved on the drive shaft 2 and extending into the sampling cylinder 5 for conveying the cuttings in the annular feeding groove into the sampling cylinder 5; the spiral feeding mechanism 6 further includes a guiding sleeve 62 rotatably sleeved on the sampling cylinder 5 and a driving member 63 for driving the guiding sleeve 62 to rotate. The guiding sleeve 62 has a spiral direction opposite to that of the spiral blade 61, and a spiral groove 64 for conveying the cuttings at the top into the annular feeding groove is formed on the guiding sleeve 62. By forming a forced feeding channel through the reverse rotation of the double spirals, the problems of easy blockage of a single spiral and low efficiency of a straight cylinder centrifugal type are solved, the directional conveying and continuous collection of cuttings are realized, the integrity of the sample sequence is ensured, and the sampling reliability in complex strata is improved. When collecting cuttings, the drive shaft 2 drives the right-handed spiral blade 61 to rotate clockwise, and at the same time, the left-handed guiding sleeve 62 is driven to rotate counterclockwise through the driving member 63. The two have opposite spiral directions, forming a double spiral channel in the annular feeding groove. Using the axial thrust of the spiral blade 61 and the guiding of the spiral groove 64 of the guiding sleeve 62, the cuttings are forced to be conveyed from the top down to the sampling cylinder 5, avoiding blockage and sequence confusion caused by centrifugal force or particle differences.

[0022] In order to facilitate the docking of the cuttings in the sampling cylinder 5: the spiral blade 61 is designed with a variable pitch. The pitch is larger at the end close to the rotary cutting assembly 3 and gradually decreases at the end close to the sampling cylinder 5. Through the design of gradually changing pitch, it adapts to the conveying requirements of cuttings with different particle sizes, improves the conveying efficiency of large cuttings, and at the same time conducts layered compaction on the soft rock samples, reduces the particle gap, protects the original structure of the sample, and improves the subsequent geological analysis accuracy. The pitch is larger at the end close to the rotary cutting assembly 3 to quickly collect and push large cuttings; the pitch gradually decreases at the end close to the sampling cylinder 5. By compressing the pitch, the cutting gap is reduced, realizing the layered compaction of the sample, ensuring that the cuttings are neither stuck nor loose during the conveying process, and adapting to the sampling requirements of the soft-hard interface strata.

[0023] To reduce the use of the drive source: The driving member 63 includes a transmission gear 631 fixedly sleeved on the drive shaft 2, a driven gear 632 rotatably mounted on the frame 1 and meshed with the transmission gear 631, and an internal tooth ring 633 fixedly embedded on the material guiding sleeve 62 and meshed with the driven gear 632. The power of the drive shaft 2 is used to realize the reverse rotation of the material guiding sleeve 62 through gear transmission, without the need for an additional drive source, simplifying the device structure, reducing energy consumption, and at the same time ensuring that the spiral direction of the spiral blade 61 is opposite to that of the material guiding sleeve 62, forming a stable double-spiral material guiding system. The drive shaft 2 drives the transmission gear 631 to rotate clockwise, the transmission gear 631 meshes with the driven gear 632 to make it rotate counterclockwise, and the driven gear 632 then drives the internal tooth ring 633 and the material guiding sleeve 62 to rotate counterclockwise synchronously, so that the spiral groove 64 of the material guiding sleeve 62 has a spiral direction opposite to that of the spiral blade 61, thereby guiding the top cuttings downward into the annular feeding groove and pushing the cuttings in the groove to the sampling cylinder 5, realizing the efficient reuse of power.

[0024] To be able to achieve adaptive cutting of the rock formation hardness: The rotary cutting assembly 3 includes a hollow cylindrical cutter head 31 fixedly connected to the lower end of the drive shaft 2. A plurality of mounting grooves 32 are circumferentially formed on the cutter head 31. A swingable rotary cutting arm 33 is rotatably arranged in the mounting groove 32. Two inclined blades 34 are fixedly mounted on the cutting arm 33. A torsion spring shaft 35 fixedly connected to the cutter head 31 is elastically sleeved on the rotating shaft rod of the cutting arm 33. A cam disk 36 adapted to the end of the cutting arm 33 away from the blade 34 is fixedly arranged in the middle of the cutter head 31. Through the cooperation of the swingable cutting arm 33 and the cam disk 36, adaptive cutting of the rock formation hardness is achieved. When cutting hard rock, the cutting angle is increased to enhance the cutting force. When cutting soft rock, a small angle is cut to protect the original state of the sample, improving the sampling efficiency and sample quality in complex strata. When the drive shaft 2 drives the cutter head 31 to rotate, the cutting arm 33 and the blade 34 swing outward under the action of inertia, so that the blade 34 gradually extends out of the mounting groove 32 along an arc trajectory, and the torsion spring shaft 35 stores energy; when drilling into a hard rock formation, the end of the cutting arm 33 abuts against the outer wall of the cam disk 36, forcing the cutting arm 33 to increase the cutting angle to 45°, enhancing the crushing ability; when encountering a soft rock formation, the torsion spring shaft 35 resets, and the cutting arm 33 swings back to a small angle (such as 15°), reducing the impact on the sample and ensuring the integrity of the soft rock structure.

[0025] Embodiment 2 Different from Embodiment 1, to facilitate the removal of the sample from the sampling cylinder 5: The sampling cylinder 5 is an eccentrically different-diameter tubular shape. The large-diameter end at the bottom of the sampling cylinder 5 is coaxial with the drive shaft 2, and a collecting cylinder 51 is threadedly sleeved on the small-diameter end at the top of the sampling cylinder 5. The eccentrically different-diameter tubular design, combined with the extrusion action of the spiral feeding mechanism 6, guides the cuttings to move along the inner wall towards the collecting cylinder 51. The threadedly connected collecting cylinder 51 is convenient for quick disassembly, avoiding the disruption of the sequence and the scattering of cuttings when the sample is poured, and improving the sampling efficiency and sample integrity. The large-diameter end at the bottom of the sampling cylinder 5 is coaxial with the drive shaft 2, and the small-diameter end at the top is threadedly connected to the collecting cylinder 51. When the spiral feeding mechanism 6 conveys the cuttings upward, the eccentric structure causes the cuttings to move along the inner wall towards the small-diameter end (collecting cylinder 51) under the action of centrifugal force and spiral thrust. After sampling, the collecting cylinder 51 can be unscrewed counterclockwise to separate the sample, which is convenient to operate and does not damage the sample sequence.

[0026] To facilitate driving the rotation of the collecting cylinder 51: A plurality of convex ribs 511 are circumferentially and fixedly connected to the outer wall of the end of the collecting cylinder 51 close to the sampling cylinder 5. The circumferential convex ribs 511 increase the friction between the hand and the collecting cylinder 51, facilitating the quick screwing of the collecting cylinder 51 during field operations, realizing the efficient disassembly of the sample, and improving the operation convenience. The convex ribs 511 increase the roughness of the outer wall of the collecting cylinder 51. The operator can apply torque by holding the convex ribs 511 and easily rotate the collecting cylinder 51 to complete the threaded separation from the sampling cylinder 5, which is especially suitable for operations when wearing gloves or in a wet and slippery environment.

[0027] Embodiment 3 Different from Embodiment 1, to reduce borehole collapse: The sampling device further includes a drilling mechanism 7 provided at the lower end of the cutter head 31. The drilling mechanism 7 includes a conical drill bit 71 disposed at the lower end of the cutter head 31 through an elastic member. A spiral and gradually expanding arc-shaped guiding edge 72 is fixedly provided on the conical drill bit 71. The elastic member is fixedly connected to a limiting sleeve 73 in the middle of the lower end of the cutter head 31. A T-shaped block 74 penetrating through the lower end thereof is provided inside the limiting sleeve 73, and the lower end of the T-shaped block 74 is fixedly connected to the upper end of the conical drill bit 71. A spring 75 fixedly connected to the upper end of the T-shaped block 74 is provided inside the limiting sleeve 73. Combining elastic buffering and variable-diameter hole expansion design, the risk of borehole collapse is reduced, stable drilling in fractured rock formations is adapted, and at the same time, the impact energy is absorbed by the spring 75 to protect the cutter head 31 and the drive shaft 2 and extend the equipment life. The conical drill bit 71 is connected to the limiting sleeve 73 at the lower end of the cutter head 31 through the spring 75. During drilling, the spring 75 buffers the impact of hard rock and avoids rigid collision. The spiral arc-shaped guiding edge 72 expands gradually, and the hole is gradually expanded with the drilling depth, enhancing the stability of the borehole wall, reducing the collapse of fractured rock formations caused by stress concentration, and at the same time guiding the cuttings towards the annular feeding trough to cooperate with the spiral feeding mechanism 6 to achieve continuous sampling.

[0028] The wiring diagram of the drilling motor 4 in the present utility model belongs to the common knowledge in the art. Its working principle is already known technology, and its model is selected according to actual use. Therefore, the control method and wiring layout of the drilling motor 4 will not be explained in detail.

[0029] The control method of this application is controlled by a controller. The control circuit of the controller can be realized by simple programming by those skilled in the art. The provision of the power ground also belongs to the common knowledge in the art. And this application is mainly used to protect mechanical devices. Therefore, the control method and circuit connection of this application will not be explained in detail.

[0030] It should be noted that a variety of standard parts used in this application can be obtained from the market, and non-standard parts can be specially customized. The connection methods adopted in this application are also very common means in the mechanical field and will not be elaborated here.

[0031] The above is only the preferred specific implementation mode of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art within the technical scope disclosed by this application, according to the technical solution and its concept of this application, makes equivalent substitutions or changes, should be covered by the protection scope of this application.

Claims

1. A rotary cutting sampling device for geological mineral resource exploration, comprising a frame (1), a driving shaft (2) rotatably arranged on the frame (1), and a rotary cutting assembly (3) arranged at the lower end of the driving shaft (2), a drilling motor (4) being fixedly mounted on the upper end of the frame (1), an output end of the drilling motor (4) being fixedly connected to an upper end shaft rod of the driving shaft (2), a sampling cylinder (5) fixedly connected to the frame (1) being sleeved on the bottom of the driving shaft (2), and an annular feeding trough being formed between the lower end of the sampling cylinder (5) and the rotary cutting assembly (3); Features: A spiral material guiding mechanism (6) is arranged in the annular material feeding trough, and the spiral material guiding mechanism (6) comprises a spiral blade (61) fixedly sleeved on the driving shaft (2) and extending into the sampling barrel (5) for conveying rock cuttings in the annular material feeding trough to the sampling barrel (5); the spiral material guiding mechanism (6) further comprises a material guiding sleeve (62) rotatably sleeved on the sampling barrel (5) and a driving member (63) for driving the material guiding sleeve (62) to rotate, the material guiding sleeve (62) and the spiral blade (61) having opposite rotation directions, and a spiral groove (64) for conveying rock cuttings located at the top to the annular material feeding trough is provided on the material guiding sleeve (62).

2. The rotary cutting sampling device for geological and mineral resource exploration according to claim 1 is characterized in that: The spiral blade (61) adopts a variable pitch design, wherein the pitch is larger at one end close to the rotary cutting assembly (3) and the pitch gradually decreases at one end close to the sampling tube (5).

3. The rotary cutting sampling device for geological and mineral resource exploration according to claim 1 is characterized in that: The driving member (63) comprises a transmission gear (631) fixedly sleeved on the driving shaft (2), a driven gear (632) rotatably mounted on the frame (1) and meshingly connected to the transmission gear (631), and an internal gear ring (633) fixedly embedded in the material guide sleeve (62) and meshingly connected to the driven gear (632).

4. The rotary cutting sampling device for geological and mineral resource exploration according to claim 1 is characterized in that: The sampling tube (5) is in the shape of an eccentric reducing tube; the bottom large-diameter end of the sampling tube (5) is coaxial with the driving shaft (2); the top small-diameter end of the sampling tube (5) is threadedly sleeved with a collecting tube (51).

5. The rotary cutting sampling device for geological and mineral resource exploration according to claim 4 is characterized in that: A plurality of ridges (511) are fixedly connected in the circumferential direction to the outer wall of one end of the collecting cylinder (51) close to the sampling cylinder (5).

6. The rotary cutting sampling device for geological and mineral resource exploration according to claim 1, characterized in that: The rotary cutting assembly (3) comprises a hollow cylindrical blade disc (31) fixedly connected to the lower end of the driving shaft (2); a plurality of mounting grooves (32) are circumferentially formed on the blade disc (31); a swingable rotary cutting blade arm (33) is rotatably arranged in the mounting groove (32); two inclined blades (34) are fixedly mounted on the blade arm (33); a torsion spring shaft (35) fixedly connected to the blade disc (31) is elastically sleeved on the rotating shaft of the blade arm (33); and a cam disc (36) adapted to an end of the blade arm (33) away from the blade (34) is fixedly arranged in the middle of the blade disc (31).

7. The rotary cutting sampling device for geological and mineral resource exploration according to claim 6 is characterized in that: The sampling device further comprises a drilling mechanism (7) arranged at the lower end of the cutter disc (31), the drilling mechanism (7) comprising a conical drill bit (71) arranged at the lower end of the cutter disc (31) via an elastic member, and a spirally and gradually expanding arc-shaped guide blade (72) is fixedly arranged on the conical drill bit (71).

8. The rotary cutting sampling device for geological and mineral resource exploration according to claim 7, characterized in that: The elastic member is fixedly connected to a limiting sleeve (73) in the middle of the lower end of the cutter disc (31); a T-shaped block (74) penetrating the lower end of the limiting sleeve (73) is arranged inside the limiting sleeve (73); the lower end of the T-shaped block (74) is fixedly connected to the upper end of the conical drill bit (71); and a spring (75) fixedly connected to the upper end of the T-shaped block (74) is arranged inside the limiting sleeve (73).

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