Sampling device for mine rock mass exploration

Abstract

The invention relates to the technical field of rock soil sampling devices, in particular to a sampling device for mine rock mass survey, which comprises an outer pipe joint, an outer pipe, a drilling bit and an inner pipe, the inner pipe is movably connected with the lower end of the outer pipe joint; the end, away from the outer pipe connector, of the inner pipe is in threaded connection with a clamp spring seat, a conical clamp spring groove is formed in the clamp spring seat, and a sampling clamp spring is movably installed in the conical clamp spring groove. The end, away from the inner pipe, of the clamp spring base is provided with a plurality of material breaking grooves distributed in the axial direction of the clamp spring base. A material breaking ring is rotationally connected to the clamping spring base, and a plurality of arc-shaped material breaking cutters with one ends rotationally connected to the material breaking ring are arranged in the material breaking ring. The problem that a rock core connected with a rock mass is inconvenient to cut off by an existing sampling device, so that the rock core is difficult to take out during sampling is effectively solved; the device is convenient to use, the sampling efficiency can be effectively improved, and a rock core and a rock mass are cut off, so that a rock core sample is conveniently taken out.

Description

Technical Field

[0001] The present invention relates to the technical field of geotechnical sampling devices, and particularly to a sampling device for mine rock mass exploration. Background Art

[0002] In key fields such as mine rock mass exploration, geological exploration, and mineral resource assessment, core sampling, as a core technical means to obtain the physical and mechanical parameters of underground rock masses and accurately analyze geological structures, is of great importance. Currently, mainstream core sampling devices, such as single-action double-tube drill tools, wireline core drill tools, etc., mainly rely on hollow drill pipes for core drilling operations. However, in the actual operation process of existing core sampling devices, although the device uses a sampling cylinder to collect the core, there are deficiencies in the key link of cutting the core connected to the rock mass; Due to the lack of an efficient and convenient cutting mechanism in the existing device, it is extremely difficult to cut off the core, which in turn makes the process of taking out the core extremely difficult. Currently, most existing devices use the pulling-off core method to separate the core. This method is to apply an axial pulling force by the pulling system of the drilling rig after drilling is completed, attempting to break the core at a weak part.

[0003] However, when using this method, the efficiency of core cutting and taking out is extremely low. For each section of core intercepted, it often requires multiple operations such as pulling out the drill and knocking on the drill tool. Especially in deep-hole operations, a single cutting operation takes a very long time, seriously affecting the work progress. Summary of the Invention

[0004] In view of the above situation, to overcome the defects of the existing technology, the present invention provides a sampling device for mine rock mass exploration, which effectively solves the problem that the existing sampling device is not convenient for cutting the core connected to the rock mass, making it difficult to take out the core during sampling.

[0005] The technical solution solved by the present invention is: A sampling device for mine rock mass exploration, including an outer pipe joint, an outer pipe threadedly connected to one end of the outer pipe joint, a drilling bit threadedly connected to one end of the outer pipe, and an inner pipe located inside the outer pipe; The inner pipe is movably connected to the lower end of the outer pipe joint; One end of the inner pipe away from the outer pipe joint is threadedly connected with a retaining ring seat, a tapered retaining ring groove is formed inside the retaining ring seat, and a sampling retaining ring is movably installed inside the tapered retaining ring groove; A plurality of material-breaking grooves distributed along the axial direction of the retaining ring seat are formed at one end of the retaining ring seat away from the inner pipe; A material-breaking ring is rotatably connected to the retaining ring seat, and a plurality of arc-shaped material-breaking knives with one end rotatably connected to the material-breaking ring are arranged inside the material-breaking ring; The blanking ring rotates, causing the arc-shaped blanking knife to contact the side wall of the blanking groove and then pushing the movable end of the arc-shaped blanking knife to swing towards a position closer to the axis of the snap ring seat; The blanking ring is pushed to rotate by a driving structure.

[0006] Preferably, an arc-shaped cutting edge is fixedly arranged at the swinging end of the arc-shaped blanking knife, and the cross-section of the cutting edge is set as an isosceles triangle.

[0007] Preferably, the driving structure includes a driving ring fixedly connected inside the drilling bit, and a plurality of guide plates for pushing the blanking ring to rotate are fixedly connected inside the driving ring; A plurality of guide shafts matched with the guide plates are fixedly connected to the outer side of the blanking ring; The lower end of the outer pipe joint is rotatably connected with a rotating rod, the rotating rod is slidably connected with the inner pipe, and an elastic member is arranged between the rotating rod and the inner pipe, and the elastic member is used for pushing the inner pipe to slide towards the outer pipe joint; A one-way bearing is installed between the outer pipe joint and the rotating rod; A reset structure for pushing the blanking ring to reset is arranged on the snap ring seat.

[0008] Preferably, the reset structure includes a reset ring slidably connected to the outer side wall of the snap ring seat, a plurality of reset plates axially distributed along the reset ring are fixedly connected to the reset ring, and a plurality of reset shafts are fixedly connected to the reset plates; A plurality of reset grooves for pushing the blanking ring to rotate are formed in the blanking ring, the reset shafts are slidably connected inside the reset grooves, and the reset grooves are inclined; A reset spring is sleeved between the blanking ring and the reset ring.

[0009] Preferably, a limiting plate is fixedly connected to the snap ring seat by bolts, a snap ring is fixedly connected to one end of the limiting plate, and a limiting groove for slidably connecting with the limiting plate is formed inside the reset ring.

[0010] Preferably, a force adding pipe for pushing the reset ring to move towards the blanking ring is sleeved on the inner pipe, and the force adding pipe slides along the axis of the inner pipe; A compression spring is sleeved between the force adding pipe and the inner pipe; A plurality of support springs for supporting the force adding pipe are arranged at the upper end of the inner pipe; A control mechanism for controlling the sliding of the force adding pipe is arranged inside the outer pipe.

[0011] Preferably, the control mechanism includes at least one tapered control groove formed in the side wall of the force adding pipe, and a ball is movably arranged inside the tapered control groove; The side wall of the inner tube is provided with a force - adding accommodation groove for accommodating the ball and a reset accommodation groove located below the force - adding accommodation groove; A control ring for pushing the ball to slide inside the control groove is fixedly installed on the inner wall of the outer tube.

[0012] Preferably, a force - adding block is fixedly connected to the lower end of the force - adding tube.

[0013] Preferably, the sampling circlip is a non - closed conical structure.

[0014] Preferably, one end of the sampling circlip is provided with a V - shaped slotted opening, and the other end is a V - shaped plate that cooperates with the slotted opening.

[0015] The beneficial effects of the present invention are as follows: The present invention solves the problem that the sampling device is not convenient for cutting the core connected to the rock mass, making it difficult to take out the core during sampling, by adding an outer tube joint, an outer tube, a drilling bit, an inner tube, a circlip seat, a conical circlip groove, a sampling circlip, a material - breaking groove, a material - breaking ring, and an arc - shaped material - breaking knife; by rotating the material - breaking ring to push the arc - shaped material - breaking knife to rotate towards the inner tube, thereby squeezing the arc - shaped material - breaking knife into the core of the inner tube, so as to break the core, thus realizing the cutting of the core connected to the rock mass; By adding a driving ring, a guide plate, a guide shaft, a rotating rod, and a one - way bearing, the rotation of the driving ring is controlled by the relative sliding of the outer tube and the inner tube; By adding a reset ring, a reset plate, a reset shaft, a reset groove, and a reset spring, the problem that the arc - shaped material - breaking knife is inconvenient to retract during sampling, resulting in inconvenient sampling of the core, is solved; By adding a force - adding tube, a compression spring, and a control mechanism, when the outer tube and the inner tube slide relative to each other, under the action of the compression spring, the force - adding tube is pushed to impact the reset ring, thereby providing an impact force to cut the core with the arc - shaped material - breaking knife.

[0016] The present invention is convenient to use, can effectively improve the sampling efficiency, and is convenient to take out the core sample by cutting the core from the rock mass. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic cross - sectional view of the present invention; Figure 3is the present invention Figure 2 Partial enlarged schematic view at position A in the present invention; Figure 4 is the present invention Figure 2 Partial enlarged schematic view at position B in the present invention; Figure 5 Schematic cross-sectional view of the drilling bit of the present invention; Figure 6 Schematic explosion view of the present invention; Figure 7 Schematic view of the drive ring of the present invention; Figure 8 Schematic view of the usage state of the arc-shaped blanking knife of the present invention; Figure 9 Schematic view of the installation position of the reset ring of the present invention; Figure 10 Schematic cross-sectional view of the force-increasing pipe of the present invention; Figure 11 is the present invention Figure 10 Partial enlarged schematic view at position C in the present invention; Figure 12 Schematic cross-sectional view of the snap ring seat of the present invention; Figure 13 is the present invention Figure 12 Partial enlarged schematic view at position D in the present invention; Figure 14 Schematic view of the sampling snap ring of the present invention.

[0019] In the figure, 1. Outer pipe joint; 2. Outer pipe; 3. Drilling bit; 4. Inner pipe; 5. Snap ring seat; 6. Conical snap ring groove; 7. Sampling snap ring; 8. Blanking groove; 9. Blanking ring; 10. Arc-shaped blanking knife; 11. Cutting edge; 12. Drive ring; 13. Guide plate; 14. Guide shaft; 15. Rotating rod; 16. One-way bearing; 17. Reset ring; 18. Reset plate; 19. Reset shaft; 20. Reset groove; 21. Reset spring; 22. Limit plate; 23. Snap ring; 24. Limit groove; 25. Force-increasing pipe; 26. Compression spring; 27. Conical control groove; 28. Ball; 29. Force-increasing accommodation groove; 30. Reset accommodation groove; 31. Control ring; 32. Support spring; 33. Force-increasing block; 34. V-shaped plate. Detailed implementation manners

[0020] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0021] The following describes the implementation manners of the present invention through specific specific examples. Those skilled in the art can easily understand the other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The present invention can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0022] It should be noted that the following describes various aspects of the embodiments within the scope of the appended claims. It should be obvious that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is illustrative only. Based on the present invention, those skilled in the art should understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects described herein can be used to implement the device and / or practice the method. In addition, this device can be implemented and this method can be practiced using other structures and / or functions in addition to one or more of the aspects described herein.

[0023] It also needs to be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. Only the components related to the present invention are shown in the diagrams, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and proportion of each component in its actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0024] In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0025] Embodiment 1

[0026] Referring to the attached Figure 1-14 , a sampling device for mine rock mass exploration, includes an outer pipe joint 1, an outer pipe 2 threadedly connected to one end of the outer pipe joint 1, a drilling bit 3 threadedly connected to one end of the outer pipe 2, and an inner pipe 4 located inside the outer pipe 2. The inner pipe 4 is movably connected to the lower end of the outer pipe joint 1; A retaining ring seat 5 is threadedly connected to the end of the inner pipe 4 away from the outer pipe joint 1. A tapered retaining ring groove 6 is formed inside the retaining ring seat 5, and a sampling retaining ring 7 is movably installed inside the tapered retaining ring groove 6; During use, the driving drill bit 3 is rotated for sampling. The drilled cylindrical core passes through the collet seat 5 and the sampling collet 7 and then enters the interior of the inner tube 4. When the drill bit 3 reaches the predetermined depth, the device is lifted upward. The sampling collet 7 clamps onto the outer edge of the core. As the device is pulled upward, the sampling collet 7 slides downward inside the conical collet groove 6. After being guided by the conical collet groove 6, the sampling collet 7 clamps tightly onto the core. The sampling collet 7 is a non-closed conical structure, which is convenient for clamping the core. One end of the sampling collet 7 is provided with a V-shaped slot, and the other end is a V-shaped plate 34 that cooperates with the slot. When the sampling collet 7 slides inside the conical collet groove 6, the V-shaped plate 34 is used for guiding so that one end of the V-shaped plate 34 is inserted into the slot.

[0027] A plurality of blanking grooves 8 distributed along the axial direction of the collet seat 5 are provided at one end of the collet seat 5 away from the inner tube 4. A blanking ring 9 is rotatably connected to the collet seat 5. A plurality of arc-shaped blanking knives 10 with one end rotatably connected to the blanking ring 9 are arranged inside the blanking ring 9. An arc-shaped cutting edge 11 is fixedly arranged at the swinging end of the arc-shaped blanking knife 10. The cross-section of the cutting edge 11 is an isosceles triangle. By increasing the cutting edge 11, it is convenient to separate the core from the rock mass. When the blanking ring 9 rotates and the arc-shaped blanking knife 10 contacts the side wall of the blanking groove 8, the movable end of the arc-shaped blanking knife 10 is pushed to swing towards the position close to the axis of the collet seat 5. During use, the blanking ring 9 is pushed to rotate. When the swinging end of the arc-shaped blanking knife 10 fits against the side wall of the blanking groove 8 and is guided by the blanking groove 8, the arc-shaped blanking knife 10 swings towards the center of the collet seat 5, thereby cutting off the core stuck inside the collet seat 5, making it convenient to take out the sampled core.

[0028] The blanking ring 9 is pushed to rotate by a driving structure. The driving structure includes a driving ring 12 fixedly connected inside the drill bit 3. A plurality of guide plates 13 for pushing the blanking ring 9 to rotate are fixedly connected inside the driving ring 12. A plurality of guide shafts 14 that cooperate with the guide plates 13 are fixedly connected to the outside of the blanking ring 9. The guide plates 13 are inclined inside the driving ring 12. Thus, when the driving ring 12 slides towards the direction close to the guide shaft 14, the guide plates 13 push the guide shafts 14 through their inclined surfaces, thereby pushing the blanking ring 9 to rotate. The lower end of the outer tube joint 1 is rotatably connected to a rotating rod 15. The rotating rod 15 is slidably connected to the inner tube 4. A limiting groove is provided inside the inner tube 4. One end of the rotating rod 15 close to the inner tube 4 is fixedly connected to a limiting block. A sliding block that slidably connects with the limiting groove is arranged on the limiting block. An elastic member is arranged between the rotating rod 15 and the inner tube 4. The elastic member is used to push the inner tube 4 to slide towards the direction close to the outer tube joint 1. In this embodiment, the elastic member is a tension spring. A one-way bearing 16 is installed between the outer pipe joint 1 and the rotating rod 15. Under the action of the one-way bearing 16, the rotating rod 15 rotates forward inside the outer pipe joint 1. When the rotating rod 15 rotates backward inside the outer pipe joint 1, the rotating rod 15 and the outer pipe joint 1 are relatively fixed under the action of the one-way bearing 16, so that the rotating rod 15 cannot rotate backward inside the outer pipe joint 1. When the drilling bit 3 is working, the guide plate 13 is located below the guide shaft 14. At this time, when the drilling bit 3 is working, it drives the driving ring 12 and the guide plate 13 to rotate synchronously. At this time, the guide plate 13 and the guide shaft 14 do not interfere with each other.

[0029] In the initial state, under the action of the elastic member, the inner pipe 4 is pushed to slide to the limit position in the direction close to the outer pipe joint 1. When the drilling bit 3 reaches the predetermined position, the device is lifted upward. At this time, the outer pipe joint 1 and the outer pipe 2 move upward. The sampling snap ring 7 slides downward inside the conical snap ring groove 6. After being guided by the conical snap ring groove 6, the sampling snap ring 7 clamps the core tightly. At this time, the outer pipe joint 1 and the outer pipe 2 move upward, and the snap ring seat 5 is fixed at the current position. Thus, the driving ring 12 is driven to move upward by the drilling bit 3. After the guide plate 13 and the guide shaft 14 contact each other, after being guided by the guide plate 13, the cutting ring 9 is driven to rotate reversely by the guide plate 13 and the guide shaft 14. Thus, after the swinging end of the arc-shaped cutting knife 10 fits against the side wall of the cutting groove 8 and is guided by the cutting groove 8, the arc-shaped cutting knife 10 swings toward the position close to the center of the snap ring seat 5, thereby cutting off the core stuck inside the snap ring seat 5.

[0030] A reset structure for pushing the cutting ring 9 to reset is provided on the snap ring seat 5. The reset structure includes a reset ring 17 slidably connected to the outer side wall of the snap ring seat 5. A plurality of reset plates 18 distributed along the axial direction of the reset ring 17 are fixedly connected to the reset ring 17, and a plurality of reset shafts 19 are fixedly connected to the reset plates 18. A plurality of reset grooves 20 for pushing the cutting ring 9 to rotate are formed in the cutting ring 9. The reset shafts 19 are slidably connected inside the reset grooves 20, and the reset grooves 20 are inclined. A reset spring 21 is sleeved between the cutting ring 9 and the reset ring 17. A limiting plate 22 is fixedly connected to the snap ring seat 5 by bolts. One end of the limiting plate 22 is fixedly connected with a snap ring 23. A limiting groove 24 slidably connected to the limiting plate 22 is formed inside the reset ring 17. By connecting with bolts, it is convenient for installation and disassembly. With this setting, the reset ring 17 is restricted so that the reset ring 17 can only slide axially on the snap ring seat 5 along the axial direction of the snap ring seat 5.

[0031] In the initial state, the guiding plate 13 is located below the guiding shaft 14, and the guiding plate 13 does not interfere with the guiding shaft 14. Under the action of the return spring 21, the return ring 17 is pushed to move away from the blanking ring 9. At this time, under the action of the return groove 20 and the return shaft 19, the blanking ring 9 is pushed to rotate forward. At this time, under the guiding action of the snap ring seat 5, the arc-shaped blanking knife 10 is located inside the blanking ring 9, so that the arc-shaped blanking knife 10 does not affect the sampling of the core.

[0032] Embodiment 2

[0033] A force-applying tube 25 for pushing the return ring 17 to move closer to the blanking ring 9 is sleeved on the inner tube 4. The force-applying tube 25 slides axially along the inner tube 4. A sliding groove is provided on the inner side of the force-applying tube 25, and a sliding block matching the sliding groove is detachably installed on the outer side wall of the inner tube 4 through a bolt, so that the force-applying tube 25 can only slide axially along the inner tube 4; A compression spring 26 is installed between the force-applying tube 25 and the inner tube 4; A plurality of support springs 32 for supporting the force-applying tube 25 are provided at the upper end of the inner tube 4; In the initial state, under the action of the compression spring 26, the force-applying tube 25 is pulled towards the bottom of the inner tube 4. At the same time, the support spring 32 pushes the force-applying tube 25 away from the bottom of the inner tube 4. Thus, when the force-applying tube 25 is in the initial position, under the action of the support spring 32, the bottom of the force-applying tube 25 does not contact the upper end of the return ring 17; A control mechanism for controlling the sliding of the force-applying tube 25 is provided on the inner side of the outer tube 2. The control mechanism includes at least one tapered control groove 27 opened on the side wall of the force-applying tube 25. A ball 28 is movably arranged inside the tapered control groove 27, and the ball 28 can slide inside the tapered control groove 27. In this embodiment, the number of the tapered control grooves 27 is set to two, and the two tapered control grooves 27 are symmetrically distributed along the axis of the force-applying tube 25, and this setting improves the stability; A force-applying receiving groove 29 for receiving the ball 28 and a return receiving groove 30 located below the force-applying receiving groove 29 are opened on the side wall of the inner tube 4; A control ring 31 for pushing the ball 28 to slide inside the control groove is fixedly installed on the inner wall of the outer tube 2.

[0034] When this embodiment is specifically implemented, in the initial state, under the driving force of the support spring 32, the bottom of the force-applying tube 25 does not contact the upper end of the return ring 17; When the drilling bit 3 reaches the predetermined position, lift the device upward. At this time, the outer pipe joint 1 and the outer pipe 2 move upward. The sampling collet 7 slides downward inside the conical collet groove 6. After being guided by the conical collet groove 6, the sampling collet 7 clamps the core tightly. At this time, the outer pipe joint 1 and the outer pipe 2 move upward, and the collet seat 5 is fixed at the current position. Thus, the driving ring 12 is driven upward by the drilling bit 3. After the guide plate 13 and the guide shaft 14 come into contact, after being guided by the guide plate 13, the cutting ring 9 is driven to rotate in the reverse direction by the guide plate 13 and the guide shaft 14. Thus, after the swinging end of the arc-shaped cutting knife 10 fits against the side wall of the cutting groove 8 and is guided by the cutting groove 8, the arc-shaped cutting knife 10 swings toward the position closer to the center of the collet seat 5; In the initial state, one end of the ball 28 contacts the inner wall of the inner pipe 4 at this time; When the outer pipe joint 1 and the outer pipe 2 move upward, the control ring 31 first contacts the ball 28. Then, the control ring 31 pushes the force-applying pipe 25 to be pulled upward synchronously through the ball 28, thereby stretching the compression spring 26 until the force-applying pipe 25 slides upward to the height where the ball 28 and the force-applying accommodation groove 29 are at the same level. Under the action of the control ring 31, the ball 28 is pushed into the force-applying accommodation groove 29. After that, the ball 28 is disengaged from the control ring 31; At this time, under the action of the compression spring 26, when the force-applying pipe 25 is pulled to slide in the direction close to the reset ring 17, after the top of the force-applying pipe 25 contacts the support spring 32, the force-applying pipe 25 compresses the support spring 32. Subsequently, the bottom of the force-applying pipe 25 impacts the top of the reset ring 17, thereby providing an instantaneous pressure, enabling the reset ring 17 to push the cutting ring 9 to twist, thus providing the force for the arc-shaped cutting knife 10 to cut the sampled core.

[0035] Subsequently, under the action of the support spring 32, the force-applying pipe 25 is pushed upward by a certain distance, so that the bottom of the force-applying pipe 25 is not in contact with the upper end of the reset ring 17, and the supporting force of the support spring 32 and the pulling force of the compression spring 26 are in a balanced state. At this time, the ball 28 is located above the reset accommodation groove 30.

[0036] If the sampled core inside the inner pipe 4 is not separated from the rock mass, push the outer pipe joint 1 and the outer pipe 2 downward. When the outer pipe joint 1 and the outer pipe 2 move downward, the control ring 31 contacts the ball 28. Subsequently, by pushing the control ring 31, the ball 28 is pushed to drive the force-applying pipe 25 to slide downward until the ball 28 and the reset accommodation groove 30 are at the same height. Under the action of the control ring 31, the ball 28 is pushed into the reset accommodation groove 30. After that, the ball 28 is disengaged from the control ring 31. At this time, under the supporting force of the support spring 32, the force-applying pipe 25 is pushed upward by a certain distance. At this time, the ball 28 moves upward, and the ball 28 slides out of the reset accommodation groove 30, and the control ring 31 is located below the ball 28; Repeat this operation to facilitate the arc-shaped cutting knife 10 to cut the core.

[0037] A power augmentation block 33 is fixedly connected to the lower end of the power augmentation pipe 25, thereby providing a greater impact force.

[0038] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A sampling device for rock mass survey in a mine, comprising an outer pipe joint, an outer pipe having one end threadedly connected to the outer pipe joint, a drilling bit having one end threadedly connected to the outer pipe, and an inner pipe located inside the outer pipe; It is characterized in that The inner tube and the lower end of the outer tube joint are movably connected; One end of the inner tube away from the outer tube joint is threadedly connected with a retaining spring seat, a conical retaining spring groove is provided inside the retaining spring seat, and a sampling retaining spring is movably installed inside the conical retaining spring groove; The end of the retaining spring seat away from the inner tube is provided with a plurality of cutting grooves distributed along the axial direction of the retaining spring seat; A material cutting ring is rotatably connected to the retaining spring seat, and a plurality of arc-shaped material cutting knives are arranged inside the material cutting ring, one end of which is rotatably connected to the material cutting ring; The cutting ring rotates to make the arc-shaped cutting knife contact the side wall of the cutting groove, and then pushes the movable end of the arc-shaped cutting knife to swing to a position close to the axis of the retaining spring seat; The material breaking ring is driven to rotate by a driving structure.

2. A sampling device for mining rock mass survey according to claim 1, characterized in that: The swing end of the arc-shaped cutting knife is fixedly provided with an arc-shaped cutting blade, and the cross section of the cutting blade is arranged as an isosceles triangle.

3. A sampling device for mining rock mass survey according to claim 1, characterized in that: The driving structure comprises a driving ring fixedly connected to the inside of the drilling bit, and a plurality of guide plates for driving the cutting ring to rotate are fixedly connected to the inside of the driving ring; A plurality of guide shafts matching the guide plates are fixedly connected to the outer side of the cutting ring; The lower end of the outer tube joint is rotatably connected to a rotating rod, the rotating rod and the inner tube are slidably connected, an elastic member is provided between the rotating rod and the inner tube, and the elastic member is used to push the inner tube to slide in a direction close to the outer tube joint; A one-way bearing is installed between the outer pipe joint and the rotating rod; The retaining spring seat is provided with a reset structure for pushing the material-breaking ring to reset.

4. A sampling device for mining rock mass survey according to claim 3, characterized in that: The reset structure comprises a reset ring slidably connected to the outer side wall of the retaining spring seat, the reset ring is fixedly connected to a plurality of reset plates distributed along the axial direction of the reset ring, and the reset plates are fixedly connected to a plurality of reset shafts; The material breaking ring is provided with a plurality of reset grooves for driving the material breaking ring to rotate, the reset shaft is slidably connected inside the reset grooves, and the reset grooves are arranged obliquely; A return spring is sleeved between the cutting ring and the return ring.

5. A sampling device for mining rock mass survey according to claim 4, characterized in that: A limiting plate is fixedly connected to the retaining spring seat by means of bolts, a retaining ring is fixedly connected to one end of the limiting plate, and a limiting groove is provided inside the reset ring and is slidably connected to the limiting plate.

6. A sampling device for mining rock mass survey according to claim 4, characterized in that: The inner tube is sleeved with a force tube for pushing the reset ring to move closer to the material breaking ring, and the force tube slides axially along the inner tube; A compression spring is installed between the booster tube and the inner tube; The upper end of the inner tube is provided with a plurality of support springs for supporting the booster tube; A control mechanism for controlling the sliding of the booster tube is arranged on the inner side of the outer tube.

7. A sampling device for mining rock mass survey according to claim 6, characterized in that: The control mechanism comprises at least one conical control groove provided on the side wall of the booster tube, wherein a ball is movably arranged inside the conical control groove; The inner tube side wall is provided with a force receiving groove for receiving the ball and a reset receiving groove located below the force receiving groove; A control ring for pushing the ball to slide inside the control groove is fixedly installed on the inner wall of the outer tube.

8. A sampling device for mining rock mass survey according to claim 6, characterized in that: The lower end of the boosting pipe is fixedly connected with a boosting block.

9. A sampling device for mining rock mass survey according to claim 1, characterized in that: The sampling clamp spring is a non-closed conical structure.

10. A sampling device for mining rock mass survey according to claim 9, characterized in that: One end of the sampling clamp is arranged as a V-shaped slot, and the other end is arranged as a V-shaped plate matched with the slot.

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