A geological sampling device for geological surveying

Abstract

This invention discloses a geological sampling device for geological mapping, specifically relating to the field of sampling equipment. It includes a mobile driver, a support base one hinged to the mobile driver, and a support base three mounted on the support base one. The support base three moves linearly along the length of the support base one. This invention, through the setting of a sampling mechanism, places a sampling inner tube inside a borehole outer tube. During sampling, the borehole outer tube is driven to rotate while the sampling inner tube remains stationary. Then, the borehole outer tube and the sampling inner tube are driven to move synchronously towards the sampling area. The rotation of the borehole outer tube can cut through hard rock, and the sampling inner tube and the sample located inside it remain in a relatively static state. That is, sampling will not cause friction or distortion of the sample inside the sampling inner tube, and the sample inside the sampling inner tube will not separate, twist, or mix. Therefore, the obtained sample can truly reflect the original sedimentary state and mechanical properties of the strata.

Description

Technical Field

[0001] This invention relates to the field of sampling equipment technology, and more specifically, to a geological sampling device for geological mapping. Background Technology

[0002] Geological surveying and geotechnical engineering investigation are fundamental prerequisites for major engineering projects such as water conservancy and hydropower, cross-river bridges, and river management. In these projects, river channels, riverbeds, and alluvial fans at the foot of mountains are common work areas. The strata in these areas typically belong to the Quaternary Holocene alluvial-diluvial deposits, characterized by a mixture of hard, large-diameter pebbles and fine sand. Accurately obtaining undisturbed soil and rock samples from the deeper parts of these strata is crucial for analyzing foundation bearing capacity, assessing the risk of soil liquefaction, and determining project site selection.

[0003] In existing technologies, single-tube rotary sampling is usually used. That is, the bottom end of the sampling tube is equipped with drill teeth. When in use, the sampling tube is driven to rotate and move towards the working area. The high-speed rotation of the sampling tube cuts the working area. As the sampling tube rotates and moves towards the working area, the sample enters the sampling tube to form a sample core. Finally, the sample in the sampling tube can be removed.

[0004] However, the existing technologies mentioned above still have shortcomings. Due to the lack of cohesion in the sand and gravel mixture, a huge frictional torque will be generated between the inner wall of the sampling tube and the sample core, causing the loose sample inside the tube to rotate with the sampling tube. This mechanical disturbance will seriously damage the original bedding structure of the sample, causing the sample to segregate, twist, or even mix, so that the obtained sample cannot truly reflect the original sedimentary state and mechanical properties of the strata. Summary of the Invention

[0005] The present invention provides a geological sampling device for geological mapping, which aims to solve the following problem: In the use of existing geological sampling devices for geological mapping, due to the lack of cohesion in the sand and gravel mixture, a huge frictional torque is generated between the inner wall of the sampling tube and the sample core, causing the loose sample inside the tube to rotate with the sampling tube. This mechanical disturbance will seriously damage the original bedding structure of the sample, causing sample segregation, distortion or even mixing, so that the obtained sample cannot truly reflect the original sedimentary state and mechanical properties of the strata.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a geological sampling device for geological mapping, comprising a mobile driver, a support seat 1 hinged on the mobile driver, a support seat 3 on the support seat 1, the support seat 3 moving linearly along the length direction of the support seat 1, and a rotation driver on the support seat 3. A sampling mechanism is provided on the rotary actuator. The sampling mechanism includes a drilling outer tube, which is detachably installed on the drive end of the rotary actuator. A sampling inner tube is provided inside the drilling outer tube. The drive end of the rotary actuator is used to drive the drilling outer tube to rotate along the central axis of the sampling inner tube. The drilling outer tube and the sampling inner tube move synchronously toward the sampling area. The sample enters the sampling inner tube through the bottom end of the sampling inner tube.

[0007] In a preferred embodiment, the sampling mechanism further includes a linear driver four, which is fixedly mounted on the support base three, and the output end of the linear driver four is fixedly mounted between the sampling inner tube and the support base three.

[0008] In a preferred embodiment, a sealing mechanism is provided inside the outer tube of the borehole. The sealing mechanism includes an air inlet pipe. A groove is formed inside the outer tube of the borehole, and the air inlet pipe is located inside the groove. An auxiliary hole is formed on the side wall of the groove, and a baffle is hinged inside the auxiliary hole.

[0009] In a preferred embodiment, a magnet is fixedly disposed inside the auxiliary hole, and a magnet is fixedly disposed on the baffle, with the baffle and the magnet being adapted to each other.

[0010] In a preferred embodiment, a limiting seat is fixedly provided on the bottom inner wall of the auxiliary hole. The limiting seat has an inclined surface and is adapted to the baffle. The limiting seat is used to position the baffle.

[0011] In a preferred embodiment, an airbag is disposed in the groove, and the bottom end of the air intake pipe is fixedly connected to the airbag.

[0012] In a preferred embodiment, the rotary drive includes a housing, which is fixedly mounted on a support base three. A motor is fixedly mounted inside the housing, a gear one is fixedly mounted on the output end of the motor, and a gear two is rotatably mounted inside the housing. Gear one and gear two mesh with each other, and a threaded sleeve is fixedly mounted on the bottom of gear two.

[0013] In a preferred embodiment, the top end of the drilled outer tube is provided with a set of external threads, the threaded sleeve engages with the external threads, and the bottom end of the drilled outer tube is provided with drill teeth.

[0014] In a preferred embodiment, a connecting seat is fixedly provided on the output end of the linear driver four, and a connecting rod is fixedly provided on the connecting seat. The top end of the sampling inner tube is installed at the bottom end of the connecting rod.

[0015] In a preferred embodiment, a linear driver 1 is hinged to the mobile driver, and the output end of the linear driver 1 is hinged to the support base 1. A support base 2 is slidably disposed on the support base 1, and the linear driver 2 is fixedly disposed on the support base 1. The output end of the linear driver 2 is fixedly disposed on the support base 2. A support base 3 is slidably disposed on the support base 2, and the linear driver 3 is fixedly disposed on the support base 2. The output end of the linear driver 3 is fixedly disposed on the support base 3.

[0016] The beneficial effects of this invention are as follows: This invention employs a sampling mechanism with an inner sampling tube inside the outer borehole tube. During sampling, the outer borehole tube is driven to rotate while the inner sampling tube remains stationary. Then, the outer borehole tube and the inner sampling tube are driven to move synchronously toward the sampling area. The rotation of the outer borehole tube can cut through hard rock, and the inner sampling tube and the sample inside it are always in a relatively static state. That is, sampling will not cause friction or twisting of the sample inside the inner sampling tube, and the sample inside the inner sampling tube will not separate, twist, or mix. In other words, the obtained sample can truly reflect the original sedimentary state and mechanical properties of the strata.

[0017] This invention, by setting up a sealing mechanism, creates a height difference between the bottom end of the outer drilling tube and the bottom end of the inner sampling tube after sampling is completed. Gas is introduced into the airbag through the air inlet pipe. After the airbag expands, it can quickly squeeze the baffle to rotate. The airbag and the baffle work together to seal the bottom end of the inner sampling tube, preventing the sample from leaking out from the bottom end. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 For the present invention Figure 1 A schematic diagram of the three-dimensional structure viewed from below.

[0020] Figure 3 This is a schematic diagram of the main structure of the mobile driver of the present invention.

[0021] Figure 4 This is a schematic diagram of the main structure of the support base of the present invention.

[0022] Figure 5 This is a schematic cross-sectional view of the main view of the outer borehole tube of the present invention.

[0023] Figure 6 This is a schematic cross-sectional view of the sampling inner tube of the present invention.

[0024] Figure 7 For the present invention Figure 6 A schematic diagram of the structure of part A.

[0025] Figure 8This is a schematic diagram of the movement trajectory of the sampling inner tube between the drilling outer tube and the present invention.

[0026] The attached figures are labeled as follows: 1. Motion driver; 11. Support base one; 12. Linear driver one; 13. Support base two; 14. Linear driver two; 15. Support base three; 16. Linear driver three; 2. Rotary driver; 3. Sampling mechanism; 31. Drilling outer tube; 311. Groove; 312. Limiting seat; 32. Sampling inner tube; 33. Linear driver four; 4. Sealing mechanism; 41. Air inlet pipe; 42. Airbag; 43. Baffle; 44. Magnet one; 45. Magnet two. Detailed Implementation

[0027] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0028] In existing technologies, geological sampling typically employs two methods. One method involves single-tube rotary sampling, where the bottom of the sampling tube is equipped with drill teeth. During use, the sampling tube is driven to rotate and move towards the work area. The high-speed rotation of the sampling tube cuts through the work area, and as the sampling tube rotates and continues to move towards the work area, the sample enters the sampling tube to form a sample core. Finally, the sample inside the sampling tube is removed. However, due to the lack of cohesion in sand and gravel mixtures, a huge frictional torque is generated between the inner wall of the sampling tube and the sample core, causing the loose sample inside the tube to rotate along with the sampling tube. This mechanical disturbance severely damages the original bedding structure of the sample, causing sample segregation, distortion, or even mixing, making it impossible for the obtained sample to truly reflect the original sedimentary state and mechanical properties of the strata.

[0029] Method two is direct pressure sampling. Direct pressure sampling avoids disturbance to the sample caused by rotation. Also known as static pressure or hammer-driven sampling, it involves directly pressing an open sampling tube into the sampling area. While this method works well in homogeneous soft soil, in riverbed gravel strata, the irregularly distributed hard pebbles and boulders create significant penetration resistance. When the bottom edge of the sampling tube encounters hard rocks, it often fails to break or cut them, preventing the tube from being pressed in, or even causing the tube to be chipped, deformed, or damaged, severely impacting sampling efficiency and depth. Therefore, to solve these problems, refer to the appendix of the instruction manual. Figure 1 , Figure 2A geological sampling device for geological mapping includes a mobile driver 1, a support base 11 hinged to the mobile driver 1, a support base 3 15 mounted on the support base 11, the support base 3 15 moving linearly along the length of the support base 11, and a rotation driver 2 mounted on the support base 3 15; a sampling mechanism 3 mounted on the rotation driver 2, the sampling mechanism 3 including a borehole outer tube 31, the borehole outer tube 31 being detachably mounted on the drive end of the rotation driver 2, and a sampling inner tube 32 disposed inside the borehole outer tube 31. The drive end of the rotation driver 2 is used to drive the borehole outer tube 31 to rotate along the central axis of the sampling inner tube 32. The borehole outer tube 31 and the sampling inner tube 32 move synchronously toward the sampling area, and the sample enters the sampling inner tube 32 through the bottom end of the sampling inner tube 32.

[0030] The sampling mechanism 3 also includes a linear actuator 4 33, which is fixedly mounted on the support base 3 15. The output end of the linear actuator 4 33 is fixedly mounted between the sampling inner tube 32 and the sampling inner tube 32.

[0031] The rotary driver 2 includes a housing, which is fixedly mounted on the support base 15. A motor is fixedly mounted inside the housing. A gear 1 is fixedly mounted on the output end of the motor. A gear 2 is rotatably mounted inside the housing. Gear 1 and gear 2 mesh with each other. A threaded sleeve is fixedly mounted on the bottom of gear 2. The threaded sleeve is the driving end of the rotary driver 2.

[0032] It should be noted that the linear actuator 33 is configured as a cylinder, which is fixedly mounted on the support base 315, and the output end of the cylinder is connected to the top end of the sampling inner tube 32.

[0033] It should also be noted that the top end of the drilling outer tube 31 is provided with a set of external threads, and the threaded sleeve engages with the external threads. The bottom end of the drilling outer tube 31 is provided with drill teeth. The drill teeth at the bottom end of the drilling outer tube 31 can improve drilling efficiency. The drilling outer tube 31 is connected to the drive end of the rotary driver 2 by threaded installation, which facilitates the disassembly of the drilling outer tube 31.

[0034] Furthermore, the mobile actuator 1 is the mobile robot, which moves using an active wheel-driven track transmission system. The track has good traversing ability in harsh road conditions. The drilling outer tube 31 is located outside the sampling inner tube 32, that is, the drilling outer tube 31 and the sampling inner tube 32 are concentrically arranged.

[0035] The specific implementation scenario is as follows: (Refer to...) Figure 3 , Figure 4 and Figure 5When the mobile driver 1 moves to the sampling area, the rotary driver 2 is activated. The driving end of the rotary driver 2 drives the borehole outer tube 31 to rotate. At this time, the sampling inner tube 32 remains stationary. That is, the borehole outer tube 31 rotates along the central axis of the sampling inner tube 32. The sampling inner tube 32 remains stationary. Then, the borehole outer tube 31 and the sampling inner tube 32 are driven to move synchronously toward the sampling area. The rotation of the borehole outer tube 31 can cut hard rocks and avoid the rocks causing penetration resistance to the sampling inner tube 32. As the borehole outer tube 31 and the sampling inner tube 32 continue to move toward the sampling area, the sample enters the sampling inner tube 32. Since the sampling inner tube 32 and the sample inside it are always in a relatively static state, that is, the sampling will not cause friction or twisting of the sample inside the sampling inner tube 32. The sample inside the sampling inner tube 32 will not be segregated, twisted or mixed. That is, the obtained sample can truly reflect the original sedimentary state and mechanical properties of the strata, which is convenient for subsequent mapping to obtain data.

[0036] Refer to the instruction manual appendix Figure 6 , Figure 7 Because gravel lacks cohesion, and the bottoms of the drilling outer tube 31 and the sampling inner tube 32 are open, when the sample is taken inside the sampling inner tube 32 and then lifted, the sample leaks directly from the bottom of the sampling inner tube 32 under gravity. This poses a risk of sample loss within the sampling inner tube 32, making it impossible to retain the sample. To address this issue, a sealing mechanism 4 is specifically installed inside the drilling outer tube 31. The sealing mechanism 4 includes an air inlet pipe 41. A groove 311 is formed inside the drilling outer tube 31, and the air inlet pipe 41 is located within the groove 311. An auxiliary hole is formed on the side wall of the groove 311, and a baffle 43 is hinged inside the auxiliary hole. A limiting seat 312 is fixedly installed on the bottom inner wall of the auxiliary hole. The limiting seat 312 has an inclined surface and is adapted to the baffle 43. The limiting seat 312 is used to position the baffle 43. A connector is fixedly mounted on the output end of the linear driver 33, and a connecting rod is fixedly mounted on the connector. The top end of the sampling inner tube 32 is mounted on the bottom end of the connecting rod.

[0037] It should be noted that a through hole is provided at the center of gear two, and the diameter of the through hole is larger than the diameter of the connecting rod. That is, the connecting rod is located inside the through hole, and the rotation of gear two will not contact the connecting rod. An air pump is fixedly connected to the top end of the air inlet pipe 41. The air pump is used to draw air or fill gas into the groove 311.

[0038] It should also be noted that multiple auxiliary holes are provided on the groove 311, and a baffle 43 is hinged in each auxiliary hole. The multiple baffles 43 cooperate with each other, that is, after the multiple baffles 43 rotate in the auxiliary hole, they can reduce the diameter of the sampling inner tube 32, thereby preventing the sample in the sampling inner tube 32 from falling out of the sampling inner tube 32.

[0039] In this embodiment, refer to Figure 7 During sampling, the bottom end of the outer drilling tube 31 and the bottom end of the inner sampling tube 32 are at the same horizontal level. Each time a sample is taken, the outer drilling tube 31 and the inner sampling tube 32 are drilled to a deeper depth. For example, if the required sampling depth is 2.5 meters, the drilling depth is increased to 2.6 meters. The rotation of the outer drilling tube 31 during sampling creates a hole in the sampling area. After sampling is complete and the sample is located inside the inner sampling tube 32, the sample inside the inner sampling tube 32 is tightly adhered to the inner wall of the inner sampling tube 32. The bottom ends of the outer drilling tube 31 and the inner sampling tube 32 exert a downward squeezing force on the bottom inner wall of the drilled hole. When it is necessary to extract the sample, the outer drilling tube 31 and the inner sampling tube 32 are simultaneously lifted. As the outer drilling tube 31 and the inner sampling tube 32 are lifted, the pressure exerted by the outer drilling tube 31 and the inner sampling tube 32 on the drilled hole is reduced. Simultaneously, the sample inside the sampling inner tube 32 is tightly adhered to the inner wall of the sampling inner tube 32, and the material between the sample at the bottom end of the sampling inner tube 32 and the inner wall of the bottom side of the borehole is broken, that is, the sample inside the sampling inner tube 32 is in an independent state. At this time, a gap can be formed between the inner wall of the bottom side of the borehole and the bottom end of the sampling inner tube 32. Then, the speed of the borehole outer tube 31 and the sampling inner tube 32 when rising is adjusted so that there is a height difference between the borehole outer tube 31 and the sampling inner tube 32 when rising. The air pump vents into the groove 311. The increase in air pressure in the groove 311 will cause the magnet 1 44 and magnet 2 45 to separate, causing the baffle 43 to rotate in the auxiliary hole. The synchronous rotation of multiple baffles 43 can reduce the open area at the bottom end of the sampling inner tube 32, thereby preventing the sampling inner tube 32 from leaking out from the bottom end of the sampling inner tube 32 under the action of gravity during the lifting process.

[0040] Refer to the instruction manual appendix Figure 7 , Figure 8 Because the baffle 43 is made of a rigid material, the sample composition at the bottom of the sampling inner tube 32 cannot be determined. To prevent large particles such as stones in the sample from getting stuck in multiple closed baffles 43, causing sand and gravel to leak out from the gaps between the baffles 43, and to prevent the baffles 43 from rotating at the fastest speed and reducing the opening diameter at the bottom of the sampling inner tube 32 after the air pressure in the groove 311 increases, an airbag 42 is specifically installed in the groove 311, and the bottom end of the air inlet pipe 41 is fixedly connected to the airbag 42. A magnet 44 is fixedly installed in the auxiliary hole, and a magnet 45 is fixedly installed on the baffle 43, with the baffle 43 and magnet 45 being compatible.

[0041] It should be noted that when a height difference is created between the bottom end of the outer drilling tube 31 and the bottom end of the inner sampling tube 32, gas is introduced into the airbag 42 through the air inlet tube 41. After the airbag 42 expands, it can quickly squeeze the baffle 43 to rotate. The airbag 42 and the baffle 43 work together to seal the bottom end of the inner sampling tube 32. This not only further prevents the sample from leaking out of the inner sampling tube 32, but also prevents large stones from getting stuck between multiple baffles 43 and causing the sample to leak out from the gaps between the baffles 43. The flexibly designed airbag 42 can automatically fill the bottom end of the inner sampling tube 32 according to the gaps between the samples, thereby completing the sealing of the bottom end of the inner sampling tube 32.

[0042] Refer to the instruction manual appendix Figure 1 , Figure 3 In order to facilitate sampling according to the terrain and usage requirements, specifically, a linear driver 12 is hinged on the mobile driver 1, the output end of the linear driver 12 is hinged to the support base 11, a support base 23 is slidably mounted on the support base 11, a linear driver 24 is fixedly mounted on the support base 11, the output end of the linear driver 214 is fixedly mounted to the support base 213, a support base 35 is slidably mounted on the support base 213, a linear driver 36 is fixedly mounted on the support base 213, and the output end of the linear driver 316 is fixedly mounted to the support base 315.

[0043] It should be noted that linear actuator 12 is configured as a cylinder, linear actuator 2 14 is configured as a cylinder, and linear actuator 3 16 is configured as a cylinder.

[0044] It should also be noted that when using linear driver 12, the movement of the output end of linear driver 12 can drive support base 11 to rotate, thereby adjusting the angle between support base 3 15 and moving driver 1, thus achieving the effect of adjusting the sampling angle. When driving linear driver 2 14, the movement of the output end of linear driver 2 14 drives support base 2 13 to move along the length direction of support base 11. When linear driver 3 16 is activated, the movement of the output end of linear driver 3 16 drives support base 3 15 to move along the output end of support base 11, thereby adjusting the drilling outer tube 31 to move towards the sampling area.

[0045] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A geological sampling device for geological mapping, characterized in that, Includes a mobile driver (1), on which a support seat one (11) is hinged, and a support seat three (15) is provided on the support seat one (11). The support seat three (15) moves linearly along the length direction of the support seat one (11), and a rotation driver (2) is provided on the support seat three (15). The rotary actuator (2) is provided with a sampling mechanism (3), which includes a drilling outer tube (31). The drilling outer tube (31) is detachably installed on the driving end of the rotary actuator (2). A sampling inner tube (32) is provided inside the drilling outer tube (31). The driving end of the rotary actuator (2) is used to drive the drilling outer tube (31) to rotate along the central axis of the sampling inner tube (32). The drilling outer tube (31) and the sampling inner tube (32) move synchronously toward the sampling area. The sample enters the sampling inner tube (32) through the bottom end of the sampling inner tube (32).

2. The geological sampling device for geological mapping according to claim 1, characterized in that: The sampling mechanism (3) also includes a linear driver four (33), which is fixedly mounted on the support base three (15). The output end of the linear driver four (33) is fixedly mounted between the sampling inner tube (32).

3. A geological sampling device for geological mapping according to claim 2, characterized in that: A sealing mechanism (4) is provided inside the drilling outer tube (31). The sealing mechanism (4) includes an air inlet pipe (41). A groove (311) is opened inside the drilling outer tube (31). The air inlet pipe (41) is located inside the groove (311). An auxiliary hole is opened on the side wall of the groove (311). A baffle (43) is hinged inside the auxiliary hole.

4. A geological sampling device for geological mapping according to claim 3, characterized in that: A magnet (44) is fixedly installed inside the auxiliary hole, and a magnet (45) is fixedly installed on the baffle (43). The baffle (43) and the magnet (45) are compatible.

5. A geological sampling device for geological mapping according to claim 4, characterized in that: A limiting seat (312) is fixedly provided on the bottom inner wall of the auxiliary hole. The limiting seat (312) is provided with an inclined surface. The limiting seat (312) is adapted to the baffle (43). The limiting seat (312) is used to position the baffle (43).

6. A geological sampling device for geological mapping according to claim 5, characterized in that: An airbag (42) is provided in the groove (311), and the bottom end of the air inlet pipe (41) is fixedly connected to the airbag (42).

7. A geological sampling device for geological mapping according to claim 6, characterized in that: The rotary drive (2) includes a housing, which is fixedly mounted on the support base (15). A motor is fixedly mounted inside the housing, and a gear one is fixedly mounted on the output end of the motor. A gear two is rotatably mounted inside the housing, and the gear one meshes with the gear two. A threaded sleeve is fixedly mounted at the bottom of the gear two.

8. A geological sampling device for geological mapping according to claim 7, characterized in that: The top end of the drilling outer tube (31) is provided with a set of external threads, the threaded sleeve engages with the external threads, and the bottom end of the drilling outer tube (31) is provided with drill teeth.

9. A geological sampling device for geological mapping according to claim 8, characterized in that: A connecting seat is fixedly provided on the output end of the linear driver four (33), and a connecting rod is fixedly provided on the connecting seat. The top end of the sampling inner tube (32) is installed at the bottom end of the connecting rod.

10. A geological sampling device for geological mapping according to claim 9, characterized in that: A linear driver (12) is hinged to the mobile driver (1). The output end of the linear driver (12) is hinged to the support base (11). A support base (13) is slidably disposed on the support base (11). A linear driver (14) is fixedly disposed on the support base (11). The output end of the linear driver (14) is fixedly disposed on the support base (13). A support base (15) is slidably disposed on the support base (13). A linear driver (16) is fixedly disposed on the support base (13). The output end of the linear driver (16) is fixedly disposed on the support base (15).

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