Small-caliber rock core sampling device and use method thereof

Abstract

The invention relates to the technical field of rock core sampling, in particular to a small-caliber rock core sampling device and a using method thereof.The device comprises a supporting frame, a driving assembly is connected to the supporting frame, an outer pipe is connected to the rotating end of the driving assembly, and an inner pipe assembly is rotationally connected to an inner cavity of the outer pipe; a sampling inner pipe for storing a rock core is mounted at the bottom of the inner pipe assembly; the blocking mechanism is mounted in the sampling inner pipe; the flushing mechanism is mounted in the inner pipe assembly and is used for adjusting the flushing amount along with rock core sampling; the blocking mechanism comprises a first-stage assembly, a second-stage assembly, a damping assembly and a blocking cylinder. The blocking cylinder is elastically connected in the sampling inner pipe; two-stage damping is carried out on the position of the blocking part through the contact resistance of the damping part and the damping plate I and the elasticity of the elastic piece II, at the moment, the water pump is started to flush water onto soil from the water pipe I, and then soil is prevented from entering the sampling inner pipe through blocking of the two-stage damping to the soil and flushing of the water.

Description

Technical Field

[0001] This invention relates to the field of core sampling technology, specifically to a small-diameter core sampling device and its usage method. Background Technology

[0002] In geological and mineral exploration, small-diameter core sampling devices are needed to collect underground core samples. These devices have a double-tube design, with the outer tube rotating to cut the rock while the inner tube does not rotate to collect the core. After sampling, the staff disassembles the inner and outer tubes and then removes the core from the inner tube.

[0003] Chinese patent document CN220929282U discloses a road drilling and rock sampling construction equipment, which relates to the field of road drilling and rock sampling technology. It includes a mobile sampling device. A first motor is fixedly installed on the top surface of the center of the mobile sampling device. The output end of the first motor is fixedly connected to a threaded rod embedded in one side surface of the mobile sampling device. A displacement block is threadedly connected to the threaded surface of the threaded rod. A rear sliding groove and a side sliding groove are respectively opened on the rear surface and the symmetrical side surface of the mobile sampling device. The above-mentioned prior art has the effect of improving the protection and stability of the equipment and extending its service life.

[0004] However, during the core sampling process, there may be soil on top of the rock. When the sampling device rotates to collect the sample, it will collect the soil on top of the rock into the inner cylinder. This soil will not only mix with the collected core, affecting the cleanliness of the core sample and increasing the workload of separating the soil later, but also reduce the amount of core collected due to the soil occupying the inner cylinder. Summary of the Invention

[0005] The purpose of this invention is to address the problems existing in the background art by proposing a small-diameter core sampling device and its usage method.

[0006] The technical solution of the present invention: A small-diameter core sampling device, comprising a support frame, a drive assembly connected to the support frame, an outer tube connected to the rotating end of the drive assembly, an inner tube assembly rotatably connected to the inner cavity of the outer tube, and a sampling inner tube for storing core samples installed at the bottom of the inner tube assembly; further comprising: A blocking mechanism is installed inside the sampling inner tube; The flushing mechanism is installed inside the inner tube assembly and is used to adjust the flushing volume as core samples are taken. The blocking mechanism includes a primary component, a secondary component, a damping component, and a blocking cylinder. The blocking cylinder is elastically connected inside the sampling inner tube. The primary component is installed inside the blocking cylinder and is used to push the soil away. The secondary component is connected inside the blocking cylinder. The damping component is installed on the inner wall of the sampling inner tube and is used to intermittently dampen the secondary component. When the sampling inner tube enters the ground, the primary component blocks the soil outside the sampling inner tube. When the primary component comes into contact with the core, the secondary component and the damping component separate first. After the resistance to the secondary component is released, the primary component retracts into the blocking cylinder, and the core enters the sampling inner tube.

[0007] Preferably, the primary component includes an elastic element one, an elastic element two, and a blocking part; the two ends of the elastic element one are respectively connected to the sampling inner tube and the blocking cylinder; the two ends of the elastic element two are respectively connected to the blocking cylinder and the blocking part.

[0008] Preferably, the secondary component comprises a blocking block, an elastic element three, a contact portion, a damping portion, and a reset unit; the blocking block is mounted on the blocking portion and blocks the contact portion; the two ends of the elastic element three are respectively connected to the blocking cylinder and the contact portion; the small end of the damping portion passes through the blocking cylinder and connects to the contact portion, and the large end of the damping portion is attached to the damping assembly; the reset unit is mounted on the contact portion.

[0009] Preferably, the reset unit includes a push rod and a triangular portion; the push rod is installed at the top end of the inner cavity of the sampling inner tube; the triangular portion is installed on the contact portion; a rectangular hole is opened at the top end of the blocking cylinder; when the blocking cylinder rises to the top end, the push rod passes through the rectangular hole to push the triangular portion.

[0010] Preferably, the damping assembly includes a first damping plate, an elastic snap-fit ​​rod, and a second damping plate; the first damping plate is installed at the bottom of the inner wall of the sampling inner tube, the elastic snap-fit ​​rod is installed on the inner wall of the sampling inner tube and located on the movement path of the secondary assembly; the second damping plate is installed on the inner wall of the sampling inner tube and located above the first damping plate.

[0011] Preferably, the flushing mechanism includes a first water pipe, a blocking rod, a ring, a second water pipe, a switching assembly, and an adjusting assembly; the two ends of the first water pipe are respectively connected to a blocking part and a connecting water pipe second; the second water pipe is connected to the outlet end of the adjusting assembly; both the blocking rod and the ring are installed inside the first water pipe, with the blocking rod located below the ring, and as the blocking part and the blocking cylinder contract, the contraction of the first water pipe causes the blocking rod to be inserted into the ring; the adjusting assembly is installed inside the inner pipe assembly; and the switching assembly is installed on the second water pipe.

[0012] Preferably, the switching assembly includes a control cylinder, a coil spring, a water-blocking part, a baffle plate, and a third water pipe; the control cylinder is connected to the second water pipe; the coil spring is installed outside the control cylinder, the rotating shaft of the water-blocking part is connected to the middle of the coil spring, and the baffle plate is installed inside the control cylinder and is used to block the water-blocking part; the inlet end of the third water pipe is connected to the control cylinder, and its outlet end is connected to the gap between the outer pipe and the sampling inner pipe.

[0013] Preferably, the adjustment assembly includes a synchronous pulley, a synchronous toothed belt, a water supply pipe, a control plate, and a water pump; there are two synchronous pulleys, which are respectively connected to the rotating shaft of the water-blocking part and the control plate; the synchronous toothed belt is sleeved on the synchronous pulleys, and the two synchronous pulleys are driven by the synchronous toothed belt; the water pump is installed on the inner pipe assembly; the inlet end of the water supply pipe is connected to the output end of the water pump, and its outlet end is connected to the second water pipe; the control plate is rotatably connected inside the water supply pipe.

[0014] Preferably, the drive assembly includes a first drive device, a lead screw, a guide rod, a lifting part, a second drive device, a gear, a gear ring, and a drill bit; the first drive device is mounted on a support frame, and its output shaft is connected to the lead screw; the lifting part is threadedly engaged with the lead screw and sleeved on the guide rod; the guide rod is mounted inside the support frame; the second drive device is mounted on the lifting part; the output shaft of the second drive device is connected to the gear, and the gear ring is mounted outside the outer tube; the gear and the gear ring mesh; the drill bit is mounted at the bottom of the outer tube.

[0015] This invention also provides a method for using a small-diameter core sampling device, which includes the following specific steps: S1. Install the support frame on the moving vehicle. The moving vehicle moves the support frame to the designated position. Then, the drive component drives the outer tube to rotate while simultaneously lowering the outer tube. S2. First, the soil entering the sampling tube is blocked by the blocking part, and at the same time, the flushing mechanism flushes water into the soil through the blocking part. S3. After contacting the core, the core entering the sampling inner tube moves the blocking part upward into the sampling inner tube. At this time, the damping part lifts the damping plate one. When the damping part is blocked by the elastic locking rod, the blocking part drives the elastic element two to contract. The blocking part drives the blocking block to move upward. The elastic element three drives the contact part to move towards the blocking block, thereby separating the damping part from the elastic locking rod, so that the blocking cylinder can continue to move into the sampling inner tube. Then the blocking block falls above the two contact parts. S4. Subsequently, the flushing mechanism flows water through the gap between the outer tube and the sampling inner tube. The core pushes the blocking cylinder into the inner cavity of the sampling inner tube, causing the elastic element to contract and accumulate elastic potential energy. S5. After sampling is completed, the push rod moves the triangular part. At this time, the blocking block descends and blocks the two contact parts again. Then the outer tube and inner tube assembly are separated. During the descent, the damping component intermittently lowers the blocking part to push the core in the sampling inner tube away from the sampling inner tube.

[0016] Compared with the prior art, the above-mentioned technical solution of the present invention has the following beneficial technical effects: The support frame is installed on the mobile base. Then, the outer tube is driven to move to the designated sampling location. The water source pipe is connected to the input end of the water pump. The water pump is then started to deliver water to water pipe one. At the same time, the drive device one is started to drive the screw to rotate, which in turn drives the lifting part to move the outer tube underground. First, it contacts the soil through the blocking part. At this time, the position of the blocking part is damped by the resistance of the contact between the damping part and the damping plate one, as well as the elasticity of the elastic element two. Then, the water pump is started to flush water from water pipe one onto the soil. The soil is blocked by the dual-stage damping and the water flushing prevents the soil from entering the sampling inner tube. When the blocking part encounters the core, it is first damped by the contact between the damping part and the damping plate. After the damping part moves along the damping plate, it is blocked by the elastic locking rod. At this time, the core squeezes the blocking part into the blocking cylinder. When the blocking part retracts into the blocking cylinder, it causes the blocking block to separate from the contact part. At this time, the elasticity of the elastic element three causes the damping part to move towards the contact part, thereby causing the core to push the blocking part into the sampling inner tube. The blocking rod is inserted into the ring to block the water pipe. Then, the impact force of the water causes the water-blocking part in the inner cavity of the control cylinder to rotate, so that the water enters the water pipe three through the control cylinder and flows into the inner cavity of the outer tube and the sampling inner tube. Then, it is flushed to the core from the bottom of the gap between the outer tube and the sampling inner tube to cool it. This achieves the direct dispersal of soil when in contact with soil, preventing soil from entering the sampling inner tube. When collecting the core, the tight fit between the core and the inner wall of the sampling inner tube prevents water from passing through. At this time, the core is cooled and flushed from the bottom of the gap between the outer tube and the sampling inner tube.

[0017] When the water-blocking part rotates, the rotation of the synchronous pulley and the synchronous toothed belt drives the control plate to rotate vertically, reducing the obstruction area of ​​the control plate on the inner cavity of the water delivery pipe, thereby increasing the water flow and realizing the adjustment of the water flow rate according to the soil and rock core. When the blocking part descends, the push rod pushes the triangular part, causing the damping part to move towards the damping plate one. This allows the elastic element one to elastically push the blocking part when the core is discharged from the inner cavity of the sampling tube. Due to the intermittent arrangement of the damping plate two, the damping part intermittently contacts the damping plate two, causing the blocking part to intermittently knock and push the core out of the inner cavity of the sampling tube. In conjunction with the staff pulling the core from the outside, the core is prevented from sticking tightly to the inner wall of the sampling tube, which would make it difficult to discharge the core. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the support frame proposed in this invention; Figure 3 This is a schematic diagram of the inner tube assembly proposed in this invention; Figure 4This is a schematic diagram of the structure of the elastic element proposed in this invention; Figure 5 This is a schematic diagram of the structure of the blocking cylinder proposed in this invention; Figure 6 This is a schematic diagram of the structure of the damping plate proposed in this invention; Figure 7 For the present invention Figure 6 Enlarged view of point A in the middle; Figure 8 For the present invention Figure 6 Enlarged view of point B in the middle; Figure 9 This is a schematic diagram of the structure of the water pipe three proposed in this invention; Figure 10 This is a schematic diagram of the coil spring portion proposed in this invention; Reference numerals: 1. Support frame; 2. Drive device one; 3. Lead screw; 4. Guide rod; 5. Lifting part; 6. Drive device two; 7. Gear; 8. Gear ring; 9. Outer tube; 10. Inner tube assembly; 11. Sampling inner tube; 12. Elastic element one; 13. Blocking cylinder; 14. Elastic element two; 15. Blocking part; 16. Blocking block; 17. Elastic element three; 18. Contact part; 19. Damping part; 20. Damping 21. Plate 1; 22. Elastic snap-fit ​​rod; 23. Damping plate 2; 24. Push rod; 25. Triangular part; 26. Water pipe 1; 27. Blocking rod; 28. Ring; 29. ​​Water pipe 2; 30. Control cylinder; 31. Spring part; 32. Water blocking part; 33. Blocking plate; 34. Synchronous pulley; 35. Synchronous toothed belt; 36. Water supply pipe; 37. Control plate; 38. Water pipe 3; 39. Drill bit; 30. Water pump. Detailed Implementation

[0019] Example 1, as Figures 1-10As shown, the present invention proposes a small-diameter core sampling device, comprising a blocking mechanism, a flushing mechanism, and a support frame 1. A driving assembly is connected to the support frame 1, and an outer tube 9 is connected to the rotating end of the driving assembly. An inner tube assembly 10 is rotatably connected to the inner cavity of the outer tube 9, and a sampling inner tube 11 for storing core samples is installed at the bottom of the inner tube assembly 10. The blocking mechanism is installed inside the sampling inner tube 11. The flushing mechanism is installed inside the inner tube assembly 10 and is used to adjust the flushing volume as core samples are taken. The blocking mechanism includes a primary component, a secondary component, a damping component, and a blocking element. Cylinder 13; The blocking cylinder 13 is elastically connected inside the sampling inner tube 11. The primary component is installed inside the blocking cylinder 13 and is used to push the soil away. The secondary component is connected inside the blocking cylinder 13. The damping component is installed on the inner wall of the sampling inner tube 11 and is used to dampen the secondary component intermittently. When the sampling inner tube 11 enters the ground, the primary component blocks the soil outside the sampling inner tube 11. When the primary component comes into contact with the core, the secondary component and the damping component separate first. After the resistance to the secondary component is released, the primary component retracts into the blocking cylinder 13, and the core enters into the sampling inner tube 11.

[0020] The primary component includes an elastic element 12, an elastic element 2 14, and a blocking part 15; the two ends of the elastic element 12 are respectively connected to the sampling inner tube 11 and the blocking cylinder 13; the two ends of the elastic element 2 14 are respectively connected to the blocking cylinder 13 and the blocking part 15; the elasticity of the elastic element 2 14 drives the blocking part 15 to resist the soil, thus preventing the soil from entering the sampling inner tube 11.

[0021] The secondary component includes a blocking block 16, an elastic element 17, a contact part 18, a damping part 19, and a reset unit. The blocking block 16 is installed on the blocking part 15 and blocks the contact part 18. The two ends of the elastic element 17 are connected to the blocking cylinder 13 and the contact part 18, respectively. The small end of the damping part 19 passes through the blocking cylinder 13 and connects to the contact part 18, while the large end of the damping part 19 is attached to the damping component. The reset unit is installed on the contact part 18. When the blocking part 15 contacts the core, the core pushes the blocking part 15 upward. At this time, it first rises along the damping plate 20 through the damping part 19. When the damping part 19 is blocked by the elastic locking rod 21, the core pushes the blocking part 15 again, causing the elastic element 14 to be compressed.

[0022] The reset unit includes a push rod 23 and a triangular part 24. The push rod 23 is installed at the top of the inner cavity of the sampling inner tube 11. The triangular part 24 is installed on the contact part 18. A rectangular hole is opened at the top of the blocking cylinder 13. When the blocking cylinder 13 rises to the top, the push rod 23 passes through the rectangular hole and pushes the triangular part 24. After the blocking part 15 drives the blocking block 16 to rise, the elasticity of the elastic element 17 drives the contact part 18 to move below the blocking block 16. When the blocking part 15 falls again, since the contact part 18 is located below the blocking block 16, the blocking block 16 is pressed on the contact part 18, thereby ensuring that when the inner cavity of the sampling inner tube 11 is pushed up by the core, the damping part 19 will not contact the damping plate 22.

[0023] The damping assembly includes a first damping plate 20, an elastic locking rod 21, and a second damping plate 22. The first damping plate 20 is installed at the bottom of the inner wall of the sampling inner tube 11, and the elastic locking rod 21 is installed on the inner wall of the sampling inner tube 11 and located on the movement path of the secondary assembly. The second damping plate 22 is installed on the inner wall of the sampling inner tube 11 and located above the first damping plate 20. When the damping part 19 rises to the top of the first damping plate 20, the elastic locking rod 21 blocks the damping part 19. When the blocking part 15 retracts into the blocking cylinder 13, the damping part 19 moves into the blocking cylinder 13, thereby separating the damping part 19 from the elastic locking rod 21.

[0024] Example 2, as Figures 1-7 , Figure 9 and Figure 10 As shown, the present invention proposes a small-diameter core sampling device. Compared with Embodiment 1, the flushing mechanism of this embodiment includes a water pipe 25, a blocking rod 26, a ring 27, a water pipe 28, a switching component, and an adjusting component. The two ends of the water pipe 25 are respectively connected to the blocking part 15 and the connecting water pipe 28. The water pipe 28 is connected to the outlet end of the adjusting component. The blocking rod 26 and the ring 27 are both installed inside the water pipe 25. The blocking rod 26 is located below the ring 27, and as the blocking part 15 and the blocking cylinder 13 contract, the contraction of the water pipe 25 inserts the blocking rod 26 into the ring 27. The adjusting component is installed inside the inner pipe assembly 10. The switching component is installed on the water pipe 28.

[0025] The switching assembly includes a control cylinder 29, a coiled spring 30, a water-blocking part 31, a baffle plate 32, and a third water pipe 37; the control cylinder 29 is connected to the second water pipe 28; the coiled spring 30 is installed outside the control cylinder 29, the rotation shaft of the water-blocking part 31 is connected to the middle of the coiled spring 30, and the baffle plate 32 is installed inside the control cylinder 29 and is used to block the water-blocking part 31; the inlet end of the third water pipe 37 is connected to the control cylinder 29, and its outlet end is connected to the gap between the outer pipe 9 and the sampling inner pipe 11; when in contact with soil, Water flows through water pipe 25 and directly washes onto the soil from the blocking part 15, which helps to disperse the soil. During the core sampling process, water is flushed out from the gap between the outer pipe 9 and the sampling inner pipe 11, thus preventing the core from being tightly attached to the sampling inner pipe 11 and preventing water from flowing out from the inner wall of the sampling inner pipe 11 and the core. The coil spring part 30 consists of a cylinder and a coil spring, with the coil spring installed inside the cylinder. The rotation shaft of the water blocking part 31 is connected to the center of the coil spring.

[0026] The regulating assembly includes a synchronous pulley 33, a synchronous toothed belt 34, a water supply pipe 35, a control plate 36, and a water pump 39. There are two synchronous pulleys 33, which are respectively connected to the rotating shafts of the water-blocking part 31 and the control plate 36. The synchronous toothed belt 34 is sleeved on the synchronous pulleys 33, and the two synchronous pulleys 33 are driven by the synchronous toothed belt 34. The water pump 39 is installed on the inner pipe assembly 10. The inlet end of the water supply pipe 35 is connected to the output end of the water pump 39, and its outlet end is connected to the second water pipe 28. The control plate 36 is rotatably connected inside the water supply pipe 35.

[0027] The drive assembly includes a drive device 2, a lead screw 3, a guide rod 4, a lifting part 5, a drive device 2 6, a gear 7, a gear ring 8, and a drill bit 38. The drive device 2 is mounted on the support frame 1, and its output shaft is connected to the lead screw 3. The lifting part 5 is threaded onto the lead screw 3 and sleeved onto the guide rod 4. The guide rod 4 is mounted inside the support frame 1. The drive device 2 6 is mounted on the lifting part 5. The output shaft of the drive device 2 6 is connected to the gear 7, and the gear ring 8 is mounted outside the outer tube 9. The gear 7 and the gear ring 8 mesh. The drill bit 38 is mounted at the bottom of the outer tube 9. A retaining spring assembly is provided at the bottom of the sampling inner tube 11. In the prior art, after core sampling is completed, the outer tube 9 and the sampling inner tube 11 are staggered vertically. Subsequently, the retaining spring assembly at the bottom of the sampling inner tube 11 is triggered by the staggered vertical movement of the outer tube 9 and the sampling inner tube 11, causing the retaining spring assembly to hold the core. As the inner tube 11 moves upward, the core is pulled off, completing the core sampling.

[0028] Example 3, as Figures 1-10 As shown, the present invention proposes a method for using a small-diameter core sampling device, employing the small-diameter core sampling device described in Example 1, and includes the following specific steps: S1. Install the support frame 1 on the moving vehicle. The moving vehicle moves the support frame 1 to the designated position. Then, the drive component drives the outer tube 9 to rotate while driving the outer tube 9 to descend. S2. First, the soil entering the sampling inner tube 11 is blocked by the blocking part 15, and at the same time, the flushing mechanism flushes water into the soil through the blocking part 15. S3. After contacting the core, the core entering the sampling inner tube 11 causes the blocking part 15 to move upward into the sampling inner tube 11. At this time, the damping part 19 lifts the damping plate 20. When the damping part 19 is blocked by the elastic locking rod 21, the blocking part 15 causes the elastic element 2 14 to contract. The blocking part 15 causes the blocking block 16 to move upward. The elasticity of the elastic element 3 17 causes the contact part 18 to move towards the blocking block 16, thereby causing the damping part 19 to separate from the elastic locking rod 21, so that the blocking cylinder 13 can continue to move into the sampling inner tube 11. Then the blocking block 16 falls above the two contact parts 18. S4. Subsequently, the flushing mechanism flows water through the gap between the outer tube 9 and the sampling inner tube 11. The core pushes the blocking cylinder 13 into the inner cavity of the sampling inner tube 11, causing the elastic element 12 to contract and accumulate elastic potential energy. S5. After sampling is completed, the push rod 23 pushes the triangular part 24 to move. At this time, the blocking block 16 descends and blocks the two contact parts 18 again. Then, the outer tube 9 and the inner tube assembly 10 are separated. During the descent, the blocking part 15 is descended intermittently through the damping component to push the rock core in the sampling inner tube 11 away from the sampling inner tube 11.

[0029] In summary, in this invention, the support frame 1 is installed on a mobile base, which can be a mobile vehicle with tracks, etc. The input end of the water pump 39 is connected to the water source input pipe. Then, the second drive device 6 is started to drive the gear 7 to rotate. Through the meshing of the gear 7 and the gear ring 8, the outer tube 9 inside the gear ring 8 is driven to rotate. Then, the first drive device 2 is started to drive the lead screw 3 to rotate. Through the threaded engagement between the lead screw 3 and the lifting part 5, the lifting part 5 is driven to descend, so that the outer tube 9 drives the drill bit 38 to drill into the ground. Next, the water pump 39 is started to deliver water into the water pipe 25. When the blocking part 15 comes into contact with the soil, the resistance of the soil is extremely small compared to that of the rock. At this time, the water flowing through the water pipe 25 washes the soil. The resistance of the contact between the damping part 19 and the damping plate 20, as well as the resistance of the elastic element 14, prevents the blocking part 15 from contracting due to the resistance of the soil when it comes into contact with the soil. At the same time, since the control plate 36 is horizontal in the inner cavity of the water pipe 35 and the control plate 36 does not contact the inner wall of the water pipe 35, the blocking area of ​​the control plate 36 in the inner cavity of the water pipe 35 is the largest, while the water flow rate is relatively small.

[0030] When the blocking part 15 contacts the core, the outer tube 9 drives the drill bit 38 to collect rock. At this time, the blocking part 15 contacts the core, pushing the blocking part 15, and then driving the damping part 19 to move upward against the damping plate 20. When the damping part 19 rises and is blocked by the elastic locking rod 21, the blocking cylinder 13 cannot move. Therefore, the core pushes the blocking part 15 into the blocking cylinder 13, causing the elastic element 14 to contract, and then driving the blocking block 16 to move upward, causing the blocking block 16 to separate from the contact part 18. Then, the elasticity of the elastic element 17 drives the contact part 18 to move towards the blocking block 16, so that the blocking block 16 presses on the contact part 18. During the rise of the blocking cylinder 13, the damping part 19 will not contact the damping plate 22. Then, the core pushes the blocking cylinder 13 to rise in the inner cavity of the sampling inner tube 11, and causes the elastic element 12 to be compressed and stored. When the blocking part 15 is pushed into the blocking cylinder 13, it is fixed by the blocking cylinder 13 through the ring 27. As the blocking part 15 rises, the bottom of the ring 27 contracts. At this time, the blocking rod 26 is inserted into the ring 27 to block the water in the water pipe 25, so that water no longer needs to flow from the water pipe 25. When the water pipe 25 is blocked, the water flow can only push the water blocking part 31 in the control cylinder 29 to move, so that the water enters the water pipe 37 through the control cylinder 29 and flows to the gap between the outer pipe 9 and the sampling inner pipe 11, and is flushed to the core through the bottom of the gap between the outer pipe 9 and the sampling inner pipe 11. When the water-blocking part 31 is pushed to rotate, it drives the synchronous pulley 33 to rotate, and through the transmission of the synchronous toothed belt 34, it drives the control plate 36 to rotate inside the water supply pipe 35, so that the horizontal control plate 36 is adjusted to be vertical, reducing the obstruction area of ​​the water supply pipe 35, and increasing the water flow rate. Thus, when washing the soil, the water flow rate is low, while when facing rocks, the resistance of the rocks to the outer pipe 9 and the drill bit 38 increases, the heat generated during processing increases, and thus the water consumption increases. After core sampling is completed, the blocking cylinder 13 rises to the top of the inner cavity of the outer tube 9. The push rod 23 is inserted into the blocking cylinder 13 and pushes the triangular part 24 to move to the outside of the blocking cylinder 13 to reset. At this time, the blocking block 16 re-blocks the contact part 18 through the elastic reset of the elastic element 2 14. Then, the outer tube 9 and the inner tube assembly 10 are disassembled. At this time, the elasticity of the elastic element 12 pushes the blocking cylinder 13 to move to the bottom of the outer tube 9 to reset. At this time, the elastic element 12 drives the blocking cylinder 13 to descend. Due to the intermittent contact between the damping part 19 and the damping plate 22, the elastic element 12 drives the blocking cylinder 13 to descend a certain distance and then stores energy to descend again. With the help of the staff pulling the core from the outside, the efficiency of core feeding from the sampling inner tube 11 is improved.

[0031] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A small-bore core sampling device, comprising a support frame (1), a drive assembly connected to the support frame (1), a rotating end of the drive assembly being connected with an outer tube (9), an inner tube assembly (10) being rotatably connected in the inner cavity of the outer tube (9), and a sampling inner tube (11) for storing cores being installed at the bottom of the inner tube assembly (10); characterized in that, Also included are: a blocking mechanism installed in the sampling inner tube (11); a flushing mechanism installed in the inner tube assembly (10) and used to adjust the flushing amount along with the core sampling; The blocking mechanism includes a primary assembly, a secondary assembly, a damping assembly, and a blocking cylinder (13); the blocking cylinder (13) is elastically connected in the sampling inner tube (11), the primary assembly is installed in the blocking cylinder (13) and used to push the soil away; the secondary assembly is connected in the blocking cylinder (13); the damping assembly is installed on the inner wall of the sampling inner tube (11) and used to damp the secondary assembly at intervals; the sampling inner tube (11) enters the ground, the primary assembly blocks the soil outside the sampling inner tube (11), when the primary assembly contacts the core, the secondary assembly and the damping assembly are first separated, the primary assembly is retracted in the blocking cylinder (13) after removing the resistance to the secondary assembly, and the core enters the sampling inner tube (11).

2. The small-bore core sampling device of claim 1, wherein, The primary assembly includes an elastic member one (12), an elastic member two (14), and a blocking part (15); both ends of the elastic member one (12) are connected with the sampling inner tube (11) and the blocking cylinder (13) respectively; both ends of the elastic member two (14) are connected with the blocking cylinder (13) and the blocking part (15) respectively.

3. A small-bore core sampling device according to claim 2, wherein, The secondary assembly includes a blocking block (16), an elastic member three (17), a contact part (18), a damping part (19), and a reset unit; the blocking block (16) is installed on the blocking part (15) and blocks the contact part (18); Both ends of the elastic member three (17) are connected with the blocking cylinder (13) and the contact part (18) respectively; the small end of the damping part (19) penetrates through the blocking cylinder (13) and is connected with the contact part (18), and the large end of the damping part (19) is attached to the damping assembly; the reset unit is installed on the contact part (18).

4. A small-bore core sampling device according to claim 3, wherein, The reset unit includes a push rod (23) and a triangular part (24); the push rod (23) is installed at the top end of the inner cavity of the sampling inner tube (11); the triangular part (24) is installed on the contact part (18); a rectangular hole is formed at the top end of the blocking cylinder (13); the blocking cylinder (13) rises to the top end, the push rod (23) penetrates through the rectangular hole and pushes the triangular part (24).

5. The small-bore core sampling device of claim 1, wherein, The damping assembly includes a damping plate one (20), an elastic clamping rod (21), and a damping plate two (22); the damping plate one (20) is installed at the bottom of the inner wall of the sampling inner tube (11), the elastic clamping rod (21) is installed on the inner wall of the sampling inner tube (11) and located on the moving path of the secondary assembly; the damping plate two (22) is installed on the inner wall of the sampling inner tube (11) and located above the damping plate one (20).

6. The small-bore core sampling device of claim 2, wherein, The flushing mechanism comprises a water pipe I (25), a blocking rod (26), a ring (27), a water pipe II (28), a switching assembly and an adjusting assembly; two ends of the water pipe I (25) are connected with the blocking part (15) and the water pipe II (28) respectively; the water pipe II (28) is communicated at the water outlet end of the adjusting assembly; the blocking rod (26) and the ring (27) are both installed in the water pipe I (25), the blocking rod (26) is below the ring (27), and the contraction of the blocking part (15) and the blocking cylinder (13) causes the contraction of the water pipe I (25) to insert the blocking rod (26) into the ring (27); the adjusting assembly is installed in the inner pipe assembly (10); the switching assembly is installed on the water pipe II (28).

7. A small-bore core sampling device according to claim 6, wherein, The switching assembly comprises a control cylinder (29), a coil spring part (30), a water blocking part (31), a blocking plate (32) and a water pipe III (37); the control cylinder (29) is communicated with the water pipe II (28); the coil spring part (30) is installed outside the control cylinder (29), the rotating shaft of the water blocking part (31) is connected with the middle part of the coil spring part (30), the blocking plate (32) is installed in the control cylinder (29) and is used for blocking the water blocking part (31); the water inlet end of the water pipe III (37) is communicated with the control cylinder (29), and the water outlet end is communicated with the gap between the outer pipe (9) and the sampling inner pipe (11).

8. A small-bore core sampling device according to claim 7, wherein, The adjusting assembly comprises synchronous pulleys (33), a synchronous toothed belt (34), a water conveying pipe (35), a control plate (36) and a water pump (39); there are two synchronous pulleys (33), and the rotating shafts of the two synchronous pulleys (33) are connected with the water blocking part (31) and the control plate (36) respectively; the synchronous toothed belt (34) is sleeved on the synchronous pulleys (33), and the two synchronous pulleys (33) are driven through the synchronous toothed belt (34); the water pump (39) is installed on the inner pipe assembly (10); the water inlet end of the water conveying pipe (35) is communicated with the output end of the water pump (39), and the water outlet end is communicated with the water pipe II (28); the control plate (36) is rotationally connected in the water conveying pipe (35).

9. The small-bore core sampling device of claim 1, wherein, The driving assembly comprises a driving device I (2), a lead screw (3), a guide rod (4), a lifting part (5), a driving device II (6), a gear (7), a gear ring (8) and a drill bit (38); the driving device I (2) is installed on the support frame (1), and the output shaft thereof is connected with the lead screw (3); the lifting part (5) is threadedly connected with the lead screw (3) and sleeved on the guide rod (4) respectively; the guide rod (4) is installed in the support frame (1); the driving device II (6) is installed on the lifting part (5); the output shaft of the driving device II (6) is connected with the gear (7), the gear ring (8) is installed outside the outer pipe (9); the gear (7) and the gear ring (8) are engaged; the drill bit (38) is installed at the bottom of the outer pipe (9).

10. A method of using a small-bore coring device, the method comprising using a small-bore coring device according to claim 4, wherein: The method comprises the following specific steps: S1, install the support frame (1) on the moving vehicle, drive the support frame (1) to move to a specified position by the moving vehicle, and then drive the outer pipe (9) to rotate and lower the outer pipe (9) at the same time by the driving assembly; S2, first block the soil entering the sampling inner pipe (11) through the blocking part (15), and flush the soil with water through the blocking part (15) by the flushing mechanism; S3, after contacting the core, the core in the sampling inner tube (11) drives the blocking part (15) to move upward in the sampling inner tube (11), at this time, the damping part (19) drives damping plate one (20) to move, when the damping part (19) is blocked by the elastic clamping rod (21), the blocking part (15) drives elastic member two (14) to contract, the blocking part (15) drives the blocking block (16) to move upward, the elasticity of the elastic member three (17) drives the contact part (18) to move toward the blocking block (16), thereby making the damping part (19) separate from the elastic clamping rod (21), so that the blocking cylinder (13) can continue to move into the sampling inner tube (11), and then the blocking block (16) falls above the two contact parts (18); S4, then the flushing mechanism flows water from the gap between the outer tube (9) and the sampling inner tube (11), the core pushes the blocking cylinder (13) to make the elastic member one (12) contract and accumulate elastic potential energy; S5, after sampling, the push rod (23) pushes the triangular part (24) to move, at this time, the blocking block (16) drops to block the two contact parts (18) again, then the outer tube (9) and the inner tube assembly (10) are disassembled, and then the core in the sampling inner tube (11) is pushed away from the sampling inner tube (11) by the damping assembly during the descending process.

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