Rock core sampling equipment

Abstract

The invention relates to rock core sampling equipment which comprises a driving mechanism and a sampling assembly, the sampling assembly comprises a sampling barrel, the sampling barrel is provided with an inner barrel and an outer barrel, and the driving mechanism is in transmission connection with the sampling assembly and is used for driving the sampling barrel to rotate; the inner cylinder is sleeved with the outer cylinder, a gap is formed between the outer cylinder and the peripheral wall of the inner cylinder, a first sampling port and a second sampling port are formed in the ends, away from the driving mechanism, of the inner cylinder and the outer cylinder respectively, and the first sampling port is located in the outer cylinder. According to the technical scheme, the rock core sampling equipment can sample and separate rocks and soil mud at the same time, so that the workload is reduced, and the progress of research on the rocks and the soil mud is accelerated.

Description

Technical Field

[0001] The present disclosure relates to the technical field of rock and soil sampling, and in particular, to a core sampling device. Background Art

[0002] In the related technology, when core sampling is performed, rocks and soil are mixed together, and the rocks and soil need to be separated later, which increases the workload and affects the progress of rock and soil research. Summary of the invention

[0003] The purpose of the present disclosure is to provide a core sampling device, which can achieve simultaneous sampling and separation of rocks and soil mud, reduce the workload, and help speed up the progress of rock and soil mud research.

[0004] In order to achieve the above-mentioned purpose, the present disclosure provides a core sampling device, including a driving mechanism and a sampling assembly, the sampling assembly including a sampling cylinder, the sampling cylinder having an inner cylinder and an outer cylinder, the driving mechanism is transmission-connected to the sampling assembly and is used to drive the sampling cylinder to rotate, the outer cylinder is sleeved in the inner cylinder and a gap is formed between the outer cylinder and the outer peripheral wall of the inner cylinder, the inner cylinder and the outer cylinder are respectively formed with a first sampling port and a second sampling port at one end away from the driving mechanism, and the first sampling port is located inside the outer cylinder.

[0005] Optionally, the sampling assembly includes a first driving member, one end of which is transmission-connected to the driving mechanism, and the other end is connected to the sampling cylinder. A sealing plug is provided in the inner cylinder and slides with the inner wall of the inner cylinder. The first driving member is used to drive the sealing plug to move axially along the inner cylinder.

[0006] Optionally, the first driving member is configured as a telescopic cylinder having a telescopic rod, the diameter of the telescopic rod is not greater than the inner diameter of the inner cylinder, and the telescopic rod is connected to the sealing plug.

[0007] Optionally, a connection structure is provided between the sampling cylinder and the first driving member, and the sampling cylinder is detachably connected to the first driving member via the connection structure.

[0008] Optionally, the first driving member has a connecting ring, and the connecting structure includes a connecting seat, a slider and a plurality of locking claws. The connecting seat is connected to the sampling tube, and the slider is movably arranged on the connecting seat along the axis of the connecting ring. The plurality of locking claws are distributed in a ring shape and are transmission-connected to the slider so that the slider can drive the plurality of locking claws to gather or disperse. When the plurality of locking claws are dispersed, the locking claws abut against the inner wall of the connecting ring.

[0009] Optionally, the inner wall of the connecting ring has a slot, and when the plurality of locking claws are spread out, the locking claws are also hooked in the slot.

[0010] Optionally, the connecting structure further includes a slide bar, an elastic member and a connecting rod. The slider is slidably connected to the slide bar. The locking claw is rotatably connected to the slider through the connecting rod. The elastic member is disposed between the slider and the connecting seat. When the plurality of locking claws are gathered, the elastic member stores an elastic force for spreading out the plurality of locking claws.

[0011] Optionally, the connecting seat has a receiving cavity, the slider is disposed in the receiving cavity, and the connecting structure further includes a dial rod, and the dial rod is connected to the slider and extends out of the receiving cavity.

[0012] Optionally, the distance between the first sampling port and the second sampling port in the axial direction of the sampling cylinder is 15 mm to 25 mm.

[0013] Optionally, the driving mechanism includes a second driving member and a transmission structure. The transmission structure includes a driving wheel, a driven wheel and a transmission belt. The transmission belt is wound between the driving wheel and the driven wheel. The driving wheel is connected to the second driving member, and the driven wheel is connected to the sampling assembly.

[0014] Through the above technical solution, for the core sampling device provided by the present disclosure, since the driving mechanism and the sampling assembly are provided, the sampling assembly includes a sampling cylinder, and the sampling cylinder has an inner cylinder and an outer cylinder. When the sampling cylinder is driven to rotate by the driving mechanism for sampling, the rock and soil first enter the outer cylinder and are affected by the centrifugal force. Since the densities of the soil mud and the rock in the rock and soil are different, the soil mud is affected by a relatively larger centrifugal force than the rock, and the soil mud will adhere to the inner wall of the outer cylinder due to the centrifugal force, while the rock is closer to the central axis of the sampling cylinder than the soil mud, that is to say, the rock is closer to the inner cylinder. Based on the above, as the rock and soil continuously enter the sampling cylinder, the soil mud adhering to the outer cylinder increases and enters the gap between the inner cylinder and the outer cylinder, while the rock will enter the inner cylinder, thereby realizing the layered sampling of the soil mud layer and the rock layer. That is to say, the soil mud and the rock are sampled separately through the outer cylinder and the inner cylinder, avoiding the mixing of the soil mud and the rock, reducing the workload of subsequent separation, and being beneficial to accelerating the research progress of the rock and the soil mud.

[0015] Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation part. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification. Together with the following specific implementation manners, they are used to explain the present disclosure, but do not constitute a limitation to the present disclosure. In the drawings: Figure 1It is a schematic structural diagram of a core sampling device provided by an exemplary embodiment of the present disclosure; Figure 2 It is another schematic structural diagram of a core sampling device provided by an exemplary embodiment of the present disclosure; Figure 3 It is yet another schematic structural diagram of a core sampling device provided by an exemplary embodiment of the present disclosure; Figure 4 It is a schematic structural diagram of a sampling cylinder of a core sampling device provided by an exemplary embodiment of the present disclosure; Figure 5 It is a schematic structural diagram of a connection structure of a core sampling device provided by an exemplary embodiment of the present disclosure.

[0017] Explanation of reference numerals 1 - Driving mechanism; 11 - Second driving member; 12 - Transmission structure; 2 - Sampling assembly; 20 - Sampling cylinder; 200 - Gap; 201 - First sampling port; 202 - Second sampling port; 21 - Inner cylinder; 22 - Outer cylinder; 23 - First driving member; 24 - Sealing plug; 25 - Connection ring; 3 - Connection structure; 30 - Second driving member; 301 - Accommodation cavity; 31 - Connection seat; 32 - Slide block; 33 - Locking claw; 34 - Slide rod; 35 - Elastic member; 36 - Link rod; 37 - Pushing rod; 4 - Moving frame; 5 - Translation plate; 6 - Roller. Detailed description of specific embodiments

[0018] The following provides a detailed description of the specific embodiments of the present disclosure in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure, and are not used to limit the present disclosure.

[0019] In the present disclosure, unless otherwise stated, the directional terms such as "inner" and "outer" refer to "inner" and "outer" relative to the contour of the corresponding component itself. In addition, the terms "first", "second", etc. used in the present disclosure are used to distinguish one element from another, and do not have sequence and importance. In addition, in the following description, when referring to the drawings, unless otherwise explained, the same reference numerals in different drawings represent the same or similar elements. The above definitions are only used to explain and illustrate the present disclosure, and should not be construed as a limitation of the present disclosure.

[0020] The present disclosure provides a core sampling device, referring to Figures 1 to 4As shown in the figure, it includes a driving mechanism 1 and a sampling component 2, the sampling component 2 includes a sampling cylinder 20, the sampling cylinder 20 has an inner cylinder 21 and an outer cylinder 22, the driving mechanism 1 is transmission-connected to the sampling component 2 and is used to drive the sampling cylinder 20 to rotate, the outer cylinder 22 is sleeved in the inner cylinder 21 and a gap 200 is formed between the outer cylinder 22 and the outer peripheral wall of the inner cylinder 21, and a first sampling port 201 and a second sampling port 202 are respectively formed at one end of the inner cylinder 21 and the outer cylinder 22 away from the driving mechanism 1, and the first sampling port 201 is located inside the outer cylinder 22.

[0021] Through the above technical solution, the core sampling device provided by the present disclosure is provided with a driving mechanism 1 and a sampling assembly 2, wherein the sampling assembly 2 includes a sampling barrel 20, and the sampling barrel 20 has an inner barrel 21 and an outer barrel 22. When the sampling barrel 20 is driven by the driving mechanism 1 to rotate for sampling, the rock and soil first enter the outer barrel 22 and are subjected to the centrifugal force. Due to the different densities of the mud and the rock in the rock and soil, the mud is subjected to a larger centrifugal force than the rock. The mud will adhere to the inner wall of the outer barrel 22 due to the centrifugal force, while the rock is more Close to the central axis of the sampling tube 20, that is, the rock is closer to the inner tube 21. Based on the above, as the rock and soil continue to enter the sampling tube 20, the soil and mud attached to the outer tube 22 increases and enters the gap 200 between the inner tube 21 and the outer tube 22, while the rock will enter the inner tube 21, thereby realizing stratified sampling of the soil and mud layers and the rock layers. That is to say, the soil and mud and rocks are sampled separately through the outer tube 22 and the inner tube 21 to avoid mixing the soil and rocks, reduce the workload of subsequent separation, and help to speed up the progress of rock and soil and mud research.

[0022] In this disclosure, please refer to Figure 4 As shown in the figure, since the first sampling port 201 is located inside the outer cylinder 22, that is, the length of the outer cylinder 22 is greater than the length of the inner cylinder 21, a separation space for separating soil and rock is formed between the outer cylinder 22 and the inner cylinder 21, so that the rock and soil entering the sampling cylinder 20 are stratified in the separation space, that is, a rock layer opposite to the inner hole of the inner cylinder 21 and a soil layer opposite to the gap 200 between the inner cylinder 21 and the outer cylinder 22 are formed, which is beneficial to the stratified sampling of the inner cylinder 21 and the outer cylinder 22.

[0023] In the exemplary embodiments provided in the present disclosure, referring to Figures 1 to 4As shown, the sampling assembly 2 may include a first driving member 23. One end of the first driving member 23 is in transmission connection with the driving mechanism 1, and the other end is connected to the sampling cylinder 20. A sealing plug 24 that is slidably engaged with the inner wall of the inner cylinder 21 is provided inside the inner cylinder 21. The first driving member 23 is used to drive the sealing plug 24 to move along the axial direction of the inner cylinder 21. With this arrangement, the driving mechanism 1 drives the first driving member 23 to rotate to drive the sampling cylinder 20 to rotate. Among them, the sealing plug 24 is used to block one end of the inner cylinder 21 close to the first driving member 23 to prevent the sample in the inner cylinder 21 from entering the first driving member 23. In addition, the provided sealing plug 24 can be used to selectively push out the sample in the inner cylinder 21, that is, when the sampling cylinder 20 enters the rock and soil layer for sampling, the sealing plug 24 always blocks one end of the inner cylinder 21 close to the first driving member 23. When the sampling cylinder 20 completes sampling and moves out of the rock and soil layer, the first driving member 23 can be used to drive the sealing plug 24 to move to push out the rock sample in the inner cylinder 21, improving the flexibility and convenience of the operation.

[0024] In the exemplary embodiment provided by the present disclosure, referring to Figures 1 to 4 As shown, the first driving member 23 may be configured as a telescopic cylinder. The telescopic cylinder has a telescopic rod. The diameter of the telescopic rod is not greater than the inner diameter of the inner cylinder 21 and is connected to the sealing plug 24. With this arrangement, the telescopic rod can extend into the inner cylinder 21 and be connected to the sealing plug 24 without adding auxiliary connecting members, which is beneficial to the lightweight of the structure. In addition, it is beneficial to reduce the overall length of the sampling assembly 2, make the sampling assembly 2 have a smaller volume, and thus is beneficial to reducing the space occupation.

[0025] In the exemplary embodiment provided by the present disclosure, referring to Figures 1 to 4 As shown, a connection structure 3 is provided between the sampling cylinder 20 and the first driving member 23. The sampling cylinder 20 is detachably connected to the first driving member 23 through the connection structure 3. By providing the connection structure 3, the sampling cylinder 20 is detachably connected to the first driving member 23, so that when the core sampling device is assembled as a whole, the sampling cylinder 20 can be assembled separately first, and then the sampling cylinder 20 and the first driving member 23 can be assembled through the connection structure 3 after the sampling cylinder 20 is assembled. Thus, it is convenient to use the core sampling device in a narrow space and improves the convenience of assembling the core sampling device.

[0026] In the exemplary embodiment provided by the present disclosure, referring to Figures 3 to 5As shown in the figure, a connecting ring 25 is provided on the first driving member 23. The connecting structure 3 may include a connecting seat 31, a slider 32 and a plurality of locking claws 33. The connecting seat 31 is connected to the sampling cylinder 20. The slider 32 is movably arranged on the connecting seat 31 along the axis of the connecting ring 25. The plurality of locking claws 33 are annularly distributed and are in transmission connection with the slider 32, so that the slider 32 can drive the plurality of locking claws 33 to gather or disperse. When the plurality of locking claws 33 are dispersed, the locking claws 33 abut against the inner wall of the connecting ring 25. In the above technical solution, the plurality of locking claws 33 are annularly distributed around the axis of the connecting ring 25. Among them, the number of locking claws 33 can be set to two or more, and the present disclosure does not make specific limitations on this.

[0027] It should be noted that the so-called gathering means that the plurality of locking claws 33 approach each other relative to the axis of the connecting ring 25, and the dispersion means that the plurality of locking claws 33 move away from each other relative to the axis of the connecting ring 25. In this way, when the plurality of locking claws 33 are dispersed, the plurality of locking claws 33 can all abut against the inner wall of the connecting ring 25 to connect the sampling cylinder 20 to the first driving member 23. When the plurality of locking claws 33 are gathered, the plurality of locking claws 33 approach each other relative to the axis of the connecting ring 25. During this process, the plurality of locking claws 33 gradually move away from the inner wall of the connecting ring 25 to disengage from the abutment with the inner wall of the connecting ring 25, thereby releasing the connection between the sampling cylinder 20 and the first driving member 23.

[0028] In the present disclosure, a plurality of guide grooves may be provided at one end of the connecting seat 31 close to the first driving member 23. The guide grooves are annularly distributed around the axis of the connecting ring 25 and extend along the radial direction of the connecting ring 25. The locking claws 33 are inserted into the corresponding guide grooves and are slidably connected with the corresponding guide grooves. When the slider 32 moves, it drives the locking claws 33 to move along the guide grooves, so that the plurality of locking claws 33 gather or disperse.

[0029] In the exemplary embodiment provided by the present disclosure, a slot (not shown in the figure) may be provided on the inner wall of the connecting ring 25. When the plurality of locking claws 33 are dispersed, the locking claws 33 are also hooked in the slot. By providing the slot, when the plurality of locking claws 33 are dispersed, the locking claws 33 are inserted into the slot and hooked in the slot, ensuring the stability and reliability of the connection between the connecting ring 25 and the locking claws 33, and avoiding the position offset or loosening of the connecting ring 25 relative to the first driving member 23 during use, thereby ensuring the stability and reliability of the sampling cylinder 20 during use.

[0030] In the exemplary embodiment provided by the present disclosure, refer to Figure 5As shown in the figure, the connecting structure 3 may include a sliding rod 34, an elastic member 35 and a connecting rod 36. The slider 32 is slidably connected to the sliding rod 34. The locking claw 33 is rotatably connected to the slider 32 through the connecting rod 36. The elastic member 35 is arranged between the slider 32 and the connecting seat 31. When multiple locking claws 33 gather together, the elastic member 35 stores elastic force to disperse the multiple locking claws 33. In the above technical solution, the slide rod 34 and the first driving member 23 can be parallel and staggered. By setting an elastic member 35, under the elastic force of the elastic member 35, the slider 32 drives the multiple locking claws 33 to disperse. Here, the elastic member 35 can be constructed as a spring, that is, when the spring is in a reset state, the multiple locking claws 33 are in a dispersed state. At this time, the multiple locking claws 33 remain in contact with the inner wall of the connecting ring 25. When the driving slider 32 moves toward the spring and the spring is compressed, the slider 32 drives the locking claws 33 to move and gather together through the connecting rod 36, so that the multiple locking claws 33 are disconnected from the inner wall of the connecting ring 25. The operation is convenient and the sampling tube 20 is easy to disassemble and assemble.

[0031] In the exemplary embodiments provided in the present disclosure, reference is made to Figure 5 As shown in , the connection seat 31 may have a receiving cavity 301, the slider 32 is arranged in the receiving cavity 301, and the connection structure 3 further includes a lever 37, which is connected to the slider 32 and extends out of the receiving cavity 301. By arranging the slider 32 in the receiving cavity 301, it is beneficial to improve the compactness of the structure, and in addition, the aesthetics of the overall structure is improved. By arranging the lever 37 connected to the slider 32, the lever 37 is extended out of the receiving cavity 301, and the slider 32 can be driven to move by toggling the lever 37. The lever 37 is easy to hold, which improves the convenience of operation.

[0032] In the present disclosure, a strip hole connected to the accommodating cavity 301 can be opened on the connecting seat 31, and the strip hole extends along the axial direction of the sliding rod 34, so that the shift rod 37 is inserted into the strip hole. In this way, the strip hole guides the shift rod 37, which is beneficial to improve the stability of the shift rod 37 and the slider 32 during movement, thereby facilitating operation.

[0033] In the exemplary embodiments provided in the present disclosure, reference is made to Figure 4 As shown in , the spacing between the first sampling port 201 and the second sampling port 202 in the axial direction of the sampling barrel 20 can be 15 mm to 25 mm. Exemplarily, the spacing between the first sampling port 201 and the second sampling port 202 in the axial direction of the sampling barrel 20 can be set to 15 mm, 20 mm or 25 mm to ensure that the sampling barrel 20 has sufficient separation space. In addition, it avoids the sampling barrel 20 being too long due to the reserved spacing between the first sampling port 201 and the second sampling port 202 being too large, thereby reducing space occupation.

[0034] In the exemplary embodiments provided in the present disclosure, reference is made toFigures 1 to 3 As shown in , the driving mechanism 1 includes a second driving member 11 and a transmission structure 12. The transmission structure 12 includes a driving wheel, a driven wheel and a transmission belt. The transmission belt is wound between the driving wheel and the driven wheel. The driving wheel is connected to the second driving member 11, and the driven wheel is connected to the sampling component 2. In the above technical solution, the second driving member 11 can be constructed as an electric motor. Through the above arrangement, when the second driving member 11 is working, it drives the driving wheel to rotate. The rotation of the driving wheel drives the driven wheel to rotate through the transmission belt, thereby driving the sampling component 2 to rotate to perform a layered sampling operation. In this way, compared with directly driving and connecting the motor to the sampling component 2, the conveyor belt provided by the present disclosure can play a buffering role, reduce the impact on the motor when it is turned sharply at high speed, stopped suddenly, or reversed, thereby helping to extend the service life of the motor.

[0035] Reference Figures 1 to 3 As shown in , the core sampling device may include a mobile frame 4, on which a translation plate and a translation mechanism are provided, and the driving mechanism 1 is installed on the translation plate, which is connected to the mobile frame 4 through the translation mechanism, and the translation mechanism is used to drive the translation plate to move in a direction parallel to the sampling tube 20. In the above technical solution, a plurality of rollers may be installed on the bottom of the mobile frame 4, and one of the rollers may be driven to rotate by the third driving mechanism 1, so that the mobile frame 4 can be moved, so as to facilitate moving the present application to a preset sampling position, wherein the third driving mechanism 1 may be constructed as a motor.

[0036] In the present disclosure, the translation mechanism can be constructed as a spiral propulsion mechanism, which drives the translation plate to move in a direction parallel to the sampling tube 20 to drive the sampling tube 20 to move, so that the sampling tube 20 can drill into the rock and soil layer during the rotation process, thereby reducing the operating difficulty and helping to improve the sampling efficiency.

[0037] Reference Figures 1 to 5 As shown in , the use process of the core sampling device provided by the present disclosure is detailed as follows: The lever 37 on the connecting structure 3 is toggled to move the slider 32 and drive the multiple locking claws 33 to gather together. At this time, the compression spring is compressed and stores elastic force. After the multiple locking claws 33 gather together, the multiple locking claws 33 are inserted into the connecting ring 25, and the multiple locking claws 33 correspond to the slots in the connecting ring 25. Then, the lever 37 is released, the spring is reset, and the elastic force of the spring causes the slider 32 to move and drive the multiple locking claws 33 to spread out, so that the locking claws 33 are inserted into the slots and hooked in the slots. At this point, the connection between the sampling barrel 20 and the first driving member 23 is completed. After that, the driving mechanism 1 works to drive the first driving member 23 to rotate, and the first driving member 23 drives the sampling barrel 20 to rotate. During this process, the translation mechanism also works to drive the translation plate to move in a direction parallel to the sampling barrel 20, so that the sampling barrel 20 drills into the rock and soil layer for sampling operation. After that, as the sampling cylinder 20 continues to drill, the geotechnical materials first enter the outer cylinder 22 and are affected by the centrifugal force. Due to the different densities of the soil mud and rocks in the geotechnical materials, the soil mud is affected by a greater centrifugal force and adheres to the inner wall of the outer cylinder 22, while the rocks are affected by a smaller centrifugal force and are closer to the inner cylinder 21. As the geotechnical materials continue to enter the sampling cylinder 20, the soil mud adhering to the outer cylinder 22 increases and enters the gap 200 between the inner cylinder 21 and the outer cylinder 22, while the rocks enter the inner cylinder 21, thus realizing the stratified sampling of the soil mud layer and the rock layer.

[0038] The preferred embodiments of the present disclosure have been described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0039] In addition, it should be noted that, among the various specific technical features described in the above specific embodiments, they can be combined in any appropriate manner without conflict. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination methods.

[0040] Furthermore, any combination can be made between the various different embodiments of the present disclosure, as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.

Claims

1. A core sampling device, characterized in that: It includes a driving mechanism and a sampling component, the sampling component includes a sampling cylinder, the sampling cylinder has an inner cylinder and an outer cylinder, the driving mechanism is transmission-connected to the sampling component and is used to drive the sampling cylinder to rotate, the outer cylinder is sleeved in the inner cylinder and a gap is formed between the outer cylinder and the outer peripheral wall of the inner cylinder, a first sampling port and a second sampling port are respectively formed at one end of the inner cylinder and the outer cylinder away from the driving mechanism, and the first sampling port is located inside the outer cylinder.

2. The core sampling device according to claim 1, characterized in that: The sampling assembly includes a first driving member, one end of which is transmission-connected to the driving mechanism, and the other end is connected to the sampling cylinder. A sealing plug is provided in the inner cylinder and slides with the inner wall of the inner cylinder. The first driving member is used to drive the sealing plug to move axially along the inner cylinder.

3. The core sampling device according to claim 2, characterized in that: The first driving member is configured as a telescopic cylinder having a telescopic rod, the diameter of the telescopic rod is not greater than the inner diameter of the inner cylinder, and the telescopic rod is connected to the sealing plug.

4. The core sampling device according to claim 2, characterized in that: A connection structure is provided between the sampling cylinder and the first driving member, and the sampling cylinder is detachably connected to the first driving member through the connection structure.

5. The core sampling device according to claim 4, characterized in that: The first driving member has a connecting ring, and the connecting structure includes a connecting seat, a slider and a plurality of locking claws. The connecting seat is connected to the sampling tube, and the slider is movably arranged on the connecting seat along the axis of the connecting ring. The plurality of locking claws are distributed in a ring shape and are transmission-connected to the slider so that the slider can drive the plurality of locking claws to gather or disperse. When the plurality of locking claws are dispersed, the locking claws abut against the inner wall of the connecting ring.

6. The core sampling device according to claim 5, characterized in that: The inner wall of the connecting ring is provided with a slot, and when the plurality of locking claws are spread out, the locking claws are still hooked in the slot.

7. The core sampling device according to claim 5, characterized in that: The connecting structure also includes a sliding rod, an elastic member and a connecting rod. The slider is slidably connected to the slide rod, the locking claw is rotatably connected to the slider through the connecting rod, the elastic member is arranged between the slider and the connecting seat, and when the multiple locking claws are gathered, the elastic member stores elastic force to disperse the multiple locking claws.

8. The core sampling device according to claim 5, characterized in that: The connecting seat has a receiving cavity, the sliding block is arranged in the receiving cavity, and the connecting structure further comprises a shifting rod, the shifting rod is connected to the sliding block and extends out of the receiving cavity.

9. The core sampling device according to claim 1, characterized in that: The distance between the first sampling port and the second sampling port in the axial direction of the sampling tube is 15 mm to 25 mm.

10. The core sampling device according to claim 1, characterized in that: The driving mechanism includes a second driving member and a transmission structure. The transmission structure includes a driving wheel, a driven wheel and a transmission belt. The transmission belt is wound between the driving wheel and the driven wheel. The driving wheel is connected to the second driving member, and the driven wheel is connected to the sampling component.

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