Sandstone grotto area rock sampling device

Abstract

The invention relates to the field of rock sampling devices, and discloses a sandstone grotto area rock sampling device which comprises a base, a drilling barrel for sampling is rotatably mounted at the bottom of the base, a driving module for driving the drilling barrel to rotate is arranged at the top of the base, and a cutting assembly for cutting samples is arranged in the drilling barrel. A follow-up assembly movably attached to the cutting-off assembly is arranged on the surface of the drilling barrel, a support used for grabbing is fixedly installed on the base, and a protruding assembly corresponding to the follow-up assembly in position is arranged at the bottom of the support. Through cooperation of the support, the protruding assembly, the follow-up assembly, the cutting assembly and the like, the protruding assembly is used for auxiliary positioning of the whole device and is used for making contact with a rock area to achieve rotation of the cutting assembly, then a cylindrical rock sample with the corresponding length can be obtained, the two ends of the sample are flush, and the integrity is better; the method can be used for subsequent indoor direct tests, and the rock sample does not need to be retrimmed.

Description

Technical Field

[0001] The invention relates to the technical field of rock sampling devices, in particular to a rock sampling device in a sandstone cave area. Background Art

[0002] Rock sampling devices usually refer to equipment used to collect rock samples. They are widely used in geological exploration, mining, civil engineering, and environmental engineering to facilitate rock analysis, research, and evaluation. The principle is to drill the rock through the drill mechanism to obtain rock samples.

[0003] For example, Chinese patent publication number CN116927692A discloses a rock sampler, which relates to the technical field of rock coring equipment, including a bottom plate, vertical plates are installed on the top of the bottom plate near both sides, a top plate is fixedly installed between the two vertical plates near the top, a power conversion structure is provided on the top of the top plate, a discharge structure is provided on the top of the bottom plate near the front, a cleaning structure is provided on the top of the bottom plate near both sides, the power conversion structure includes a rotating ring and a rotating block, the rotating ring is rotatably installed at the top of the top plate near the front position, the rotating block is rotatably installed at the top of the top plate and located inside the rotating ring, the two vertical plates are provided with lifting grooves on the adjacent sides, the lifting plates are slidably installed inside the two lifting grooves at the same time, and a coring drill is rotatably installed on the bottom of the lifting plate near the front. The discharge structure is provided to facilitate the removal of rock samples inside the coring drill.

[0004] The patented coring drill obtains columnar rock samples, but the two ends of the rock samples cannot be effectively cut off during sampling, so that the rock samples need to be trimmed after sampling before they can be used for subsequent indoor tests, which has certain limitations in use.

[0005] Therefore, it is necessary to provide a rock sampling device for sandstone cave areas to solve the above technical problems. Summary of the invention

[0006] The object of the present invention is to provide a rock sampling device for sandstone cave areas to solve the problems raised in the above-mentioned background technology.

[0007] In order to achieve the above purpose, a rock sampling device for sandstone cave areas is designed, which can directly obtain rock samples with flush ends and better integrity during sampling and can be used for indoor experiments without further trimming.

[0008] Based on the above ideas, the present invention provides the following technical solutions: a rock sampling device for sandstone cave areas, comprising a base, a drill barrel for sampling is rotatably installed at the bottom of the base, a driving module for driving the drill barrel to rotate is arranged on the top of the base, a cutting assembly for cutting samples is arranged inside the drill barrel, a follower assembly movably fitted with the cutting assembly is arranged on the surface of the drill barrel, a bracket for grasping is fixedly installed on the base, and a protruding assembly corresponding to the position of the follower assembly is arranged at the bottom of the bracket; when the protruding assembly contacts the rock area, the cutting assembly can cut the rock sample through the follower assembly.

[0009] As a further solution of the present invention: the protruding component includes a gear column rotatably installed in the bracket and a transverse rack and a vertical rack slidably installed in the bracket, the transverse rack and the vertical rack are both transmission connected to the gear column, a pad is fixedly installed at the bottom of the vertical rack, a side plate is fixedly installed at the end of the transverse rack, and a roller corresponding to the position of the follower component is rotatably installed on the surface of the side plate.

[0010] As a further solution of the present invention: the vertical rack and the horizontal rack extend from the bottom and side of the bracket respectively; when the vertical rack retracts into the base, the horizontal rack can be driven toward the drill tube through the tooth column, and then the roller is driven to contact the follower assembly through the side plate.

[0011] As a further solution of the present invention: the cutting assembly includes several groups of cutters rotatably installed in the drill barrel and arranged up and down, the cutters in the same row are internally movably sleeved with long rods that slide with the drill barrel, the outer surfaces of the long rods are movably engaged with balls that slide and engage with the cutters, and the inside of the cutters is provided with spiral grooves for the balls to slide; a circular ring is commonly sleeved between all the long rods, a spring is fixedly installed between the circular ring and the drill barrel, and the follower assembly is movably fitted with the several long rods.

[0012] As a further solution of the present invention: when the long rod descends based on the drill tube, the cutter can be driven to rotate based on the drill tube through the ball and the spiral groove, and the cutter can be rotated out of the drill tube to cut the rock sample.

[0013] As a further solution of the present invention: the number of segments of the rock sample is equal to the number of groups of the cutters minus one, and a cylindrical rock sample can be obtained after the cutters are rotated.

[0014] As a further solution of the present invention: the follower assembly includes two semicircular bars, which are staggered up and down, and the inner walls of the two semicircular bars are fixedly installed with a push rod that movably fits with one of the long rods, and the end of the push rod that fits with the long rod is designed with an inclined surface; when the push rod approaches the drill tube, one of the long rods can be pushed down by the inclined surface.

[0015] As a further solution of the present invention: the bracket includes a horizontal handle fixedly connected to the base and two cover shells located below the horizontal handle, the gear column, the vertical rack and the horizontal rack are all arranged in the cover shell, and a support rod passing through the horizontal handle is rotatably installed on the top of the cover shell, one of the support rods is threadedly connected to the horizontal handle, and a connecting rod is fixedly installed between the two cover shells.

[0016] As a further solution of the present invention: when the threaded support rod is rotated, the two cover shells can be driven to rise and fall synchronously based on the horizontal handle through the connecting rod.

[0017] As a further solution of the present invention: the thickness dimension of the roller along the up-down direction is greater than the sum of the thickness dimensions of the two semicircular strips along the up-down direction.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: through the cooperation between the bracket, the protruding component, the follower component and the cutting component, the protruding component is used for auxiliary positioning of the entire device on the one hand, and is used for contacting the rock area to realize the rotation of the cutting component on the other hand, thereby obtaining a cylindrical rock sample of corresponding length, with both ends of the sample flush and better integrity, which can be used for subsequent indoor direct tests without further trimming of the rock sample. Moreover, more sections of cylindrical rock samples can be obtained through the cutting component, thereby effectively improving the overall sampling efficiency, and is also beneficial to the later sample test. At the same time, the overall device is also easy to transport and carry, and can be quickly put into use in different sampling environments, with higher practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is further described below in conjunction with the accompanying drawings and embodiments:

[0020] Figure 1 It is a stereoscopic diagram of the overall structure of the present invention.

[0021] Figure 2 It is a schematic diagram of the protruding component structure of the present invention.

[0022] Figure 3 It is a schematic diagram of the drill tube and semicircular bar structure of the present invention.

[0023] Figure 4 It is a schematic diagram of the cutter and long rod structure of the present invention.

[0024] Figure 5 for Figure 4 A magnified view of the structure in the middle.

[0025] Figure 6 for Figure 4 Enlarged view of the structure at point B in the middle.

[0026] Figure 7 It is a schematic diagram of the handlebar and cover structure of the present invention.

[0027] Figure 8 for Figure 7 Enlarged view of the structure at point C in the middle.

[0028] Fig. 9 It is a schematic diagram of the cover shell and connecting rod structure of the present invention.

[0029] Fig.10 It is a schematic diagram of the transmission assembly structure of the present invention. DETAILED DESCRIPTION

[0030] Example 1

[0031] See also Figures 1 to 6 The embodiment of the present invention provides a rock sampling device for sandstone cave area, which is mainly used to realize the rapid sampling of cylindrical rock samples of a certain size. The device comprises a base 1, a drill tube 3 for sampling is rotatably installed under the base 1, and a driving module 2 for driving the drill tube 3 to rotate is arranged on the top of the base 1. When the driving module 2 drives the drill tube 3 to rotate, a columnar rock sample can be obtained; wherein, the drill tube 3 and the driving module 2 are both existing mature technologies, and are not described in detail here.

[0032] Furthermore, a cutting assembly 7 for cutting columnar rock samples is provided inside the drill barrel 3, and a follower assembly 6 movably fitted with the cutting assembly 7 is provided on the surface of the drill barrel 3. The follower assembly 6 can rotate synchronously with the rotation of the drill barrel 3, and the follower assembly 6 can realize the movement of the cutting assembly 7 based on the inner wall of the drill barrel 3, thereby realizing the cutting of the columnar rock sample; of course, in the initial state, the cutting assembly 7 and the inner wall of the drill barrel 3 are kept flush, and will not interfere with the columnar forming of the rock sample in the drill barrel 3.

[0033] Among them, a bracket 4 is also fixedly installed on the base 1, and the bracket 4 is used for the user to hold with both hands; correspondingly, the bracket 4 has a transverse part and a longitudinal part, and its transverse part can be grasped by both hands, and the bottom of its longitudinal part is provided with a protruding component 5 corresponding to the position of the follower component 6. The protruding component 5 protrudes relative to the bottom of the longitudinal part on the one hand, and protrudes toward the drill tube 3 on the other hand. As the drill tube 3 extends into the rock area for sampling, the protruding component 5 can eventually contact the rock area and shrink toward the longitudinal inside. When shrinking, the protruding component 5 can contact the follower component 6, and then the follower component 6 drives the cutting component 7 to act on the columnar rock sample, completes the cutting, and finally obtains a cylindrical rock sample.

[0034] Reference Figures 1 to 3In this embodiment, preferably: the protruding component 5 includes a tooth column 501 rotatably installed in the longitudinal part and a transverse rack 502 and a vertical rack 503 slidably installed in the longitudinal part, the transverse rack 502 and the vertical rack 503 are both transmission connected to the tooth column 501, and the transverse rack 502 and the vertical rack 503 are arranged in a front-to-back staggered manner based on the tooth column 501, the bottom of the vertical rack 503 protrudes relative to the bottom of the longitudinal part and is fixedly installed with a pad 504, the end of the transverse rack 502 protrudes toward the drill barrel 3 and is fixedly installed with a side plate 505, and the surface of the side plate 505 close to the drill barrel 3 is rotatably installed with a roller 506 corresponding to the position of the follower component 6, which is used to reduce friction loss.

[0035] In the above structure, the pad 504 is used to finally contact the rock area. When the pad 504 contacts the rock area, it can drive the vertical rack 503 to retract inwardly in the longitudinal part and drive the tooth column 501 to rotate. The tooth column 501 can drive the horizontal rack 502 to move outwardly in the longitudinal part and drive the side plate 505 to move synchronously. The side plate 505 drives the roller 506 to contact the follower component 6, and then drives the cutting component 7 to act on the rock sample through the follower component 6.

[0036] Reference Figures 4 to 6 In this embodiment, preferably, the cutting assembly 7 includes a plurality of groups of cutters 701 rotatably mounted in the drill tube 3, and the plurality of groups of cutters 701 are arranged correspondingly up and down. In this embodiment, the number of groups of cutters 701 is two, and the number of cutters 701 in each group is four, forming two groups of four rows.

[0037] Furthermore, the cutter 701 in the same row is internally movably sleeved with a long rod 702 that slides up and down with the drill tube 3, and the outer surface of the long rod 702 is movably engaged with a ball 704 that slides and engages with the cutter 701; correspondingly, the inside of the cutter 701 is provided with a spiral groove 703 for the ball 704 to slide. When the long rod 702 descends based on the drill tube 3, the cutter 701 can be driven to rotate based on the drill tube 3 through the ball 704 and the spiral groove 703. At this time, the cutter 701 can be rotated out of the drill tube 3 to cut the rock sample.

[0038] In the above structure, the four rows of cutters 701 eventually correspond to the four long rods 702. A circular ring 705 is sleeved between the four long rods 702 to realize the synchronous up and down movement of the four long rods 702. A spring 706 is fixedly installed between the top surface of the circular ring 705 and the drill tube 3. The spring 706 makes the circular ring 705 have a tendency to rise based on the drill tube 3, thereby driving the four long rods 702 to rise. When the long rod 702 is in the rising state, the cutter 701 can be driven to rotate to a state flush with the inner wall of the drill tube 3 through the ball 704 and the spiral groove 703. At this time, the cutter 701 will not affect the columnar forming of the rock sample in the drill tube 3. This is also the initial state of the cutter 701. When the long rod 702 descends, the rock sample can be cut off by the cutter 701.

[0039] In order to realize the corresponding movement of the long rod 702, two of the long rods 702 are correspondingly fitted with the follower assembly 6. When the follower assembly 6 moves under the action of the roller 506, the long rod 702 can be squeezed to make it descend along the drill tube 3, thereby realizing the corresponding movement of the cutter 701; when the follower assembly 6 is separated from the long rod 702, the ring 705 can drive the long rod 702 to rise and reset under the action of the spring 706.

[0040] By designing the upper and lower two groups of cutters 701, cylindrical rock samples with corresponding heights can be obtained, and the integrity of the rock samples is better, which can be convenient for direct indoor testing. Of course, in actual use, if three groups of cutters 701 are used, two sections of cylindrical rock samples can be directly obtained, which can relatively improve the sampling efficiency of rock samples, and multiple rock samples can form the same cylindrical shape for testing, which can also relatively ensure the test efficiency; wherein, the number of rock sample sections is equal to the number of cutter 701 groups minus one.

[0041] Reference Figures 3 to 5 In this embodiment, preferably, the follower assembly 6 includes two semicircular bars 601, the two semicircular bars 601 are designed to be staggered up and down, and the two semicircular bars 601 are designed to be a complete ring along the upper and lower squares, and the inner walls of the two semicircular bars 601 are fixedly installed with a push rod 602 that is movably fitted with one of the long rods 702. Here, the push rod 602 extends into the interior of the drill tube 3 and its end can be designed with a slope. When the push rod 602 approaches the drill tube 3, it can push one of the long rods 702 to descend, and at this time, all the long rods 702 are synchronously descended through the ring 705.

[0042] The roller 506 has a certain width in the vertical direction, which is greater than or equal to the sum of the heights of the two semicircular bars 601 in the vertical direction, so that when the drill tube 3 drives the semicircular bars 601 to rotate, the roller 506 can still form a corresponding state with the semicircular bars 601.

[0043] Furthermore, a cavity 301 is provided inside the drill tube 3 for accommodating the cutter 701 , the long rod 702 , the ring 705 and the spring 706 , and the push rod 602 is also extended into the cavity 301 to contact the long rod 702 .

[0044] When in use, the user grasps the lateral part of the bracket 4 with both hands, and then moves the entire device so that the drill barrel 3 corresponds to the position to be sampled, starts the driving module 2 to drive the drill barrel 3 to rotate and start sampling, and at the same time the drill barrel 3 begins to extend into the rock area; in this process, the base 1 and the bracket 4 gradually approach the rock area, thereby increasing the length of the rock sample in the drill barrel 3. At this time, the longitudinal part of the bracket 4 and the two pads 504 can be used by the user to correspond to the position of the rock area. When the two longitudinal parts (pads 504) are at an equal distance from the rock area, it can be determined that the direction of the drill barrel 3 is straight and not tilted, that is, the longitudinal part and the pads 504 play an auxiliary positioning role.

[0045] As the bracket 4 approaches the rock area, the pad 504 may eventually contact the rock area and shrink inwardly in the longitudinal portion. When shrinking, the vertical rack 503 drives the side plate 505 and the roller 506 to move toward the semicircular bar 601 through the tooth column 501 and the horizontal rack 502, so that the semicircular bar 601 drives the top rod 602 to move into the drill tube 3 and squeezes one of the long rods 702 to make it descend. At this time, all the long rods 702 are synchronously descended through the ring 705. When the long rod 702 descends, it drives the cutter 701 to rotate out of the drill tube 3 through the ball 704 and the spiral groove 703, and cuts the rock sample into a cylindrical shape. The length of the rock sample is equal to the distance between the upper and lower sets of cutters 701.

[0046] In summary, through the coordination of structures such as the pad 504, the roller 506, the long rod 702 and the cutter 701, the pad 504 is used for auxiliary positioning of the entire device on the one hand, and is used to contact the rock area to realize the rotation of the cutter 701 on the other hand, so that a cylindrical rock sample of corresponding length can be obtained, and the two ends of the sample are flush and have better integrity, which can be used for subsequent indoor direct tests without the need to further trim the rock sample; by setting different numbers of groups of cutters 701, more sections of cylindrical rock samples can be obtained, which can effectively improve the overall sampling efficiency, and is also beneficial to the later sample tests. At the same time, the overall device is also easy to transport and carry, and can be quickly put into use in different sampling environments, with higher practicality.

[0047] Example 2

[0048] See also Figures 1 to 8 On the basis of Example 1, considering that when multiple sets of upper and lower cutters 701 are used, the rock sample in the drill tube 3 needs to have a certain length, and the spacing between the pad 504 and the rock area is relatively fixed, so the contact time between the pad 504 and the rock area is roughly fixed. If you want to get more sections of rock samples, you need to improve the position of the pad 504.

[0049] To this end, the bracket 4 includes a horizontal handle 401 fixedly connected to the base 1 and two covers 402 located below the horizontal handle 401. The tooth column 501, the vertical rack 503 and the horizontal rack 502 are all arranged in the cover 402, and a support rod 403 penetrating the horizontal handle 401 is rotatably installed on the top of the cover 402, one of the support rods 403 is in a threaded connection with the horizontal handle 401, and the cover 402 can be raised and lowered relative to the horizontal handle 401 by rotating the support rod 403. In order to realize the top movement of the two covers 402, a connecting rod 404 is fixedly installed between the two covers 402.

[0050] When the support rod 403 is rotated, the two cover shells 402 can be driven to rise and fall synchronously through the connecting rod 404, and the cover shell 402 can drive the side plate 505 and the roller 506 to rise and fall synchronously through the horizontal rack 502. At this time, the thickness of the roller 506 in the up and down direction needs to be greater than the length of the two semicircular bars 601 in the up and down direction, otherwise the roller 506 may be offset from the semicircular bar 601 and cannot contact it after rising and falling with the side plate 505.

[0051] Alternatively, the side plate 505 is improved: in this case, a vertical rod 507 is fixedly installed at the bottom of the side plate 505, which is slidably matched with the base 1. The vertical rod 507 limits the side plate 505 so that it can only slide left and right based on the base 1. The surface of the side plate 505 away from the roller 506 is provided with a slide groove 508 for the horizontal rack 502 to slide up and down. At this time, the horizontal rack 502 can still drive the side plate 505 to move left and right synchronously through the slide groove 508, and when the cover 402 drives the horizontal rack 502 to move up and down, the horizontal rack 502 can slide based on the slide groove 508 and cannot drive the side plate 505 to move up and down. With the above design, it is necessary to set a roller 506 with a larger thickness to ensure that the roller 506 accurately corresponds to the two semicircular bars 601.

[0052] Further, in this embodiment, preferably: the drill tube 3 includes an upper seat 302, a connector 304 and a lower seat 303 arranged from top to bottom, and the upper seat 302, the connector 304 and the lower seat 303 are sequentially connected to form a detachable connection through buckles, the upper seat 302 is driven by the driving module 2, and the lower seat 303 is used for rock sampling, and the connector 304 is used for the placement of the cutter 701 and the long rod 702, and the long rod 702 is also designed in multiple sections. When the upper seat 302, the connector 304 and the lower seat 303 are assembled, the long rod 702 inside them can automatically form an upper and lower correspondence, so that when the top rod 602 moves into the drill tube 3, the long rod 702 can descend to rotate the cutter 701. In the above structure, the detachable connection formed by the buckle is an existing mature technology and will not be described in detail here.

[0053] Among them, multiple groups of cutters 701 in the upper and lower directions can be set in the connector 304 to obtain cylindrical samples with different numbers of sections. Alternatively, the ring 705 and the spring 706 are also directly placed on the connector 304 accordingly. In this case, the cutting component 7 and the follower component 6 are integrated on the connector 304, which is convenient for subsequent disassembly, maintenance and replacement.

[0054] Furthermore, the connector 304 can be designed in multiple ways, and the multiple connectors 304 are also connected by snap-fit, thereby changing the overall length of the drill tube 3 in the up-down direction, and further adjusting the number of sections obtained after the cutter 701 is rotated.

[0055] During use, a cylindrical rock sample of corresponding length can be obtained through structures such as the pad 504, the roller 506 and the long rod 702. The integrity of the sample is better and it is convenient for direct testing. The working process and effect of this part are the same as those in Example 1, and will not be repeated here. The difference is that before use, the threaded support rod 403 can be rotated to adjust the position of the cover 402 on one side, and the cover 402 on the other side can be kept synchronized up and down through the connecting rod 404, thereby changing the spacing between the pad 504 and the rock area, and changing the overall length of the sample in the drill tube 3. When the pad 504 contacts the rock area later, cylindrical rock samples of different lengths and different numbers of sections can be obtained by changing the length of the rock sample and the connector 304.

[0056] Compared with Example 1, by coordinating structures such as the horizontal handle 401, the cover 402, the support rod 403 and the connector 304, changing the position of the cover 402 and the pad 504 based on the horizontal handle 401 and the setting of the connector 304, cylindrical rock samples of different lengths and different numbers of sections can be obtained, which can further improve the sampling efficiency and facilitate later tests on the basis of ensuring the integrity of the rock samples. The overall solution is combined with the setting of the bracket 4, and will not affect the auxiliary positioning function of the entire device, and has stronger applicability.

[0057] Example 3

[0058] See also Figures 1 to 10 On the basis of Example 2, taking into account the uncertainty of the sampling position and the flatness of the rock area, it is possible that one of the pads 504 contacts the rock area while the other pad 504 does not, and thus the synchronous movement of the two rollers 506 cannot be guaranteed, which may affect the synchronous rotation of all the cutters 701.

[0059] To this end, the two vertical rods 507 are improved: now a transmission assembly 8 is provided between the two vertical rods 507 and the base 1, through which the two vertical rods 507 can be moved closer / away from each other, thereby achieving the same-direction movement of the two rollers 506, ensuring the stable lifting and lowering of the long rod 702.

[0060] Alternatively, the transmission assembly 8 is disposed between the two push rods 602 . When one of the push rods 602 moves, the transmission assembly 8 can drive the two push rods 602 to move in the same direction, thereby also ensuring the stable lifting and lowering of the long rod 702 .

[0061] Reference Fig. 9 and Fig.10 In this embodiment, preferably: the transmission assembly 8 includes a gear 801 rotatably installed on the bottom surface of the base 1 and a connecting rack 802 fixedly connected to the vertical rod 507, the two vertical rods 507 correspond to the two connecting racks 802, and the two connecting racks 802 are both connected to the gear 801 to form a transmission connection, and the two connecting racks 802 move in the opposite direction through the gear 801, so that the two vertical rods 507 drive the two rollers 506 to achieve relative approach / distance.

[0062] When in use, through the structures such as the pad 504, the roller 506 and the long rod 702, a cylindrical rock sample of corresponding length can be obtained, the integrity of the sample is better and it is convenient for direct testing; through the structures such as the horizontal handle 401, the cover 402 and the support rod 403, cylindrical rock samples of different lengths and different numbers of sections can be obtained, which can further improve the sampling efficiency and facilitate later tests. The working process and effect of this part are the same as those in Example 2, and will not be repeated here. The difference is that when one of the pads 504 contacts the rock area, it can shrink into the cover 402, and the side plate 505 is driven to approach the drill tube 3 through the vertical rack 503, the horizontal rack 502 and the tooth column 501. The vertical rod 507 can drive the other side plate 505 to approach the drill tube 3 by connecting the rack 802 and the gear 801, so that the two rollers 506 move in the same direction.

[0063] Compared with Example 2, through the cooperation of structures such as the side plate 505, the vertical rod 507, the gear 801 and the connecting rack 802, the two rollers 506 can be relatively close to each other / far away, ensuring that the cutter 701 is smoothly rotated out of the drill tube 3 to complete the cutting, reducing the impact of the rock area environment on the pad 504, and effectively improving the applicable environment of the sampling device. The overall solution is combined with the setting of the vertical rod 507, which is conducive to ensuring that the cutter 701 cuts the rock sample smoothly, meeting more requirements in actual use.

Claims

1. A rock sampling device for sandstone cave areas, comprising a base, a drill tube for sampling is rotatably mounted at the bottom of the base, and a driving module for driving the drill tube to rotate is arranged at the top of the base. It is characterized in that The interior of the drill barrel is provided with a cutting assembly for cutting samples, the surface of the drill barrel is provided with a follower assembly that movably fits with the cutting assembly, a bracket for grasping is fixedly installed on the base, and the bottom of the bracket is provided with a protruding assembly corresponding to the position of the follower assembly; when the protruding assembly contacts the rock area, the cutting assembly can cut the rock sample through the follower assembly.

2. The rock sampling device for sandstone cave area according to claim 1, It is characterized in that The protruding component includes a gear column rotatably installed in the bracket and a transverse rack and a vertical rack slidably installed in the bracket. The transverse rack and the vertical rack are both transmission connected to the gear column. A pad is fixedly installed at the bottom of the vertical rack, and a side plate is fixedly installed at the end of the transverse rack. A roller corresponding to the position of the follower component is rotatably installed on the surface of the side plate.

3. The rock sampling device for sandstone cave area according to claim 2, It is characterized in that The vertical rack and the horizontal rack extend from the bottom and the side of the bracket respectively; when the vertical rack retracts into the base, the horizontal rack can be driven to approach the drill pipe through the tooth column, and then the roller is driven to contact the follower assembly through the side plate.

4. The rock sampling device for sandstone cave area according to any one of claims 1 to 3, It is characterized in that The cutting assembly includes a plurality of groups of cutters rotatably mounted in a drill tube and arranged vertically. The cutters in the same row are movably sleeved with a long rod that slides with the drill tube. The outer surface of the long rod is movably engaged with a ball that slides with the cutter. The inside of the cutter is provided with a spiral groove for the ball to slide. A circular ring is sleeved between all the long rods. A spring is fixedly installed between the circular ring and the drill tube, and the follower assembly is movably fitted with the plurality of long rods.

5. The rock sampling device for sandstone cave area according to claim 4, It is characterized in that When the long rod descends based on the drill tube, the cutter can be driven to rotate based on the drill tube through the ball and the spiral groove, and the cutter can be rotated out of the drill tube to cut off the rock sample.

6. The rock sampling device for sandstone cave area according to claim 4, It is characterized in that The number of segments of the rock sample is equal to the number of groups of the cutters minus one, and a cylindrical rock sample can be obtained after the cutters are rotated.

7. The rock sampling device for sandstone cave area according to claim 4, It is characterized in that The follower assembly includes two semicircular bars, which are staggered up and down. The inner walls of the two semicircular bars are fixedly installed with a push rod that movably fits with one of the long rods. The end of the push rod that fits with the long rod adopts an inclined surface design; when the push rod approaches the drill tube, one of the long rods can be pushed down through the inclined surface.

8. The rock sampling device for sandstone cave area according to claim 7, It is characterized in that The bracket includes a horizontal handle fixedly connected to the base and two cover shells located below the horizontal handle. The gear column, vertical rack and horizontal rack are all arranged in the cover shell, and a support rod passing through the horizontal handle is rotatably installed on the top of the cover shell, one of the support rods is threadedly connected to the horizontal handle, and a connecting rod is fixedly installed between the two cover shells.

9. The rock sampling device for sandstone cave area according to claim 8, It is characterized in that When the threaded support rod is rotated, the two cover shells can be driven to rise and fall synchronously based on the horizontal handle through the connecting rod.

10. The rock sampling device for sandstone cave area according to claim 8, It is characterized in that The thickness dimension of the roller along the up-down direction is greater than the sum of the thickness dimensions of the two semicircular strips along the up-down direction.

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