Engineering drilling soil core retrieval device

Abstract

This invention discloses a soil core sampling device for engineering drilling, comprising a drive box, a telescopic rod fixedly connected to the side wall of the drive box, and a drive column fixedly connected to the end of the telescopic rod away from the drive box. The side wall of the drive column has a drive groove and a storage tank. The storage tank is filled with magnetorheological fluid, and a piston is slidably connected within the storage tank. A drive mechanism for moving the piston is installed in the drive groove. A rubber cylinder is fixedly connected to the end of the drive column away from the drive box. This invention utilizes the variable liquid properties of the soft rubber cylinder and the magnetorheological fluid to form a shape that perfectly matches the end face of the core. Then, an electromagnetic plate on the outside is energized, causing the magnetorheological fluid to solidify under a strong magnetic field. The solidified rubber cylinder then pushes out the core, effectively avoiding the concentration of thrust on the narrow contact surface that could lead to core breakage.

Description

Technical Field

[0001] This invention relates to the field of geological technology, and in particular to a soil core sampling device for engineering drilling. Background Technology

[0002] In the field of geological engineering, it is often necessary to extract underground rocks and use them as geological data to guide construction. The specific sampling method is generally to drill through the rock, and the rock will remain in the sampling hole of the drill to form a "core". After the core rises to the surface with the drill, it needs to be removed from the sampling hole by a special receiving or withdrawing device.

[0003] To improve the integrity of retrieved core samples, Chinese Patent Publication No. CN114396238A discloses a core retrieval device. This device primarily uses an ejector to push the core sample from the sampling hole into the claw of a receiving device, then uses the claw to retrieve the core, reducing friction between the core and the inner wall of the sampling hole. However, in practical applications, the drilled core face is generally irregular and uneven, making it difficult for the ejector to align with the core face. When pushing the core outward, the ejector often applies force only to the small contact area between the ejector and the core. This concentrated force on the narrow surface of the core can easily damage it, hindering geological data collection. Therefore, this application proposes an engineering drilling soil core retrieval device. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an engineering drilling soil core receiving device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An engineering drilling soil core sampling device includes a drive box. A telescopic rod is fixedly connected to the side wall of the drive box, and a drive column is fixedly connected to the end of the telescopic rod away from the drive box. A drive groove and a liquid storage tank are formed on the side wall of the drive column. The liquid storage tank is filled with magnetorheological fluid, and a piston is slidably connected to the liquid storage tank. A drive mechanism for moving the piston is installed in the drive groove. A rubber flexible cylinder is fixedly connected to the end of the drive column away from the drive box, and a through hole is formed on the inner wall of the liquid storage tank, connecting the liquid storage tank and the rubber flexible cylinder. Two support rods are fixedly connected to the side wall of the drive column, and an mounting plate is fixedly connected to the end of each support rod away from the drive column. An electromagnetic plate is installed on the side wall of the mounting plate.

[0007] Preferably, a threaded cylinder is fixedly connected to the end of the drive column away from the rubber cylinder, a first screw is threadedly connected inside the threaded cylinder, and the end of the first screw away from the threaded cylinder extends into the drive box, and a rotation mechanism for rotating the first screw is installed inside the drive box.

[0008] Preferably, the driving mechanism includes a second screw rotatably connected to the inner wall of the driving groove, a driving nut slidably connected in the driving groove, and the driving nut being threadedly connected to the second screw. The driving nut is fixedly connected to the piston via a connecting rod.

[0009] Preferably, the rotating mechanism includes a rack slidably connected to the drive box, the first screw is connected to a gear via a one-way bearing, and the rack meshes with the gear. A movable plate is slidably connected inside the drive box, and the movable plate is fixedly connected to the bottom of the drive box by a spring. The lower end of the rack is fixedly connected to the upper end of the movable plate.

[0010] Preferably, a hollow ring is fixedly connected to the circumferential sidewall of the drive column by a plurality of connecting rods, and bristles are fixedly connected to the circumferential sidewall of the hollow ring. A one-way air inlet pipe and a one-way air outlet pipe communicating with the interior are installed on the sidewall of the drive box, and the one-way air outlet pipe communicates with the interior of the hollow ring. A plurality of exhaust holes are opened on the circumferential sidewall of the hollow ring.

[0011] Preferably, the connection points between the one-way air inlet pipe and the one-way air outlet pipe and the drive box are both located at the bottom inner part of the drive box, and a one-way shut-off valve is installed inside the one-way air inlet pipe and the one-way air outlet pipe.

[0012] Preferably, a base plate is fixedly connected to the side wall of the drive box, and the base plate is provided with fixing bolts.

[0013] The present invention has the following beneficial effects:

[0014] 1. By setting up a piston, a drive mechanism, magnetorheological fluid, and a rubber soft tube, the drive mechanism can squeeze the magnetorheological fluid in the storage tank into the rubber soft tube. The soft rubber soft tube and the variable properties of the magnetorheological fluid can be used to make the end face of the rubber soft tube form a shape that perfectly matches the end face of the rock core. Then, the electromagnetic plate on the outside is energized, and the magnetorheological fluid solidifies under the action of a strong magnetic field. At this time, the solidified rubber soft tube can push out the rock core. This can effectively avoid the thrust being concentrated on the narrow surface where the two are in contact, which would cause the rock core to break.

[0015] 2. By setting up a first screw, a threaded cylinder and a rotating mechanism, the first screw can be rotated by the rotating mechanism, and the first screw can be continuously screwed out from the thread. This can push the drive column and the rubber soft cylinder to move laterally, thereby continuously pushing the rock core out of the sampling hole of the drill bit.

[0016] 3. By setting up a hollow ring, a one-way air inlet pipe and a one-way air outlet pipe, the drive column can drive the hollow ring to move during the rotation of the first screw driven by the rotating mechanism. The bristles on the outside of the hollow ring can continuously clean the rock powder remaining on the inner wall of the drill bit sampling hole, and at the same time, the airflow is continuously discharged from the one-way air outlet pipe, which can further promote the rock powder on the inner wall of the drill bit sampling hole to fall off. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the engineering drilling soil core collection device proposed in this invention;

[0018] Figure 2 for Figure 1 Enlarged schematic diagram of the structure at point A in the diagram;

[0019] Figure 3 This is a schematic diagram of the connection structure of the drive column, the interior of the rubber soft cylinder, the piston, the drive mechanism, and the hollow ring in this invention.

[0020] Figure 4 This is a schematic diagram of the connection structure between the hollow ring and the one-way exhaust pipe of the present invention.

[0021] Figure 5 A schematic diagram of the structure of the rubber flexible tube in this invention;

[0022] Figure 6 This is a schematic diagram of the structure of the drive column and rubber cylinder when they enter the sampling hole of the drill bit and push out the core in this invention.

[0023] In the diagram: 1. Drive box, 2. Base plate, 3. Movable plate, 4. Rack, 5. One-way air inlet pipe, 6. One-way air outlet pipe, 7. Drive column, 8. Support rod, 9. Mounting plate, 10. Electromagnetic plate, 11. Hollow ring, 12. Rubber soft cylinder, 13. Telescopic rod, 14. Threaded cylinder, 15. First screw, 16. Gear, 17. One-way bearing, 18. Drive groove, 19. Liquid storage tank, 20. Through hole, 21. Piston, 22. Second screw, 23. Handwheel, 24. Drive nut, 25. Connecting rod, 26. Exhaust hole, 27. Core, 28. Connecting rod, 29. Spring, 30. Drill tool. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0025] Reference Figure 1-6 The engineering drilling soil core sampling device includes a drive box 1, a base plate 2 fixedly connected to the side wall of the drive box 1, and fixing bolts on the base plate 2. The drive box 1 can be fixed using the fixing bolts on the base plate 2.

[0026] A telescopic rod 13 is fixedly connected to the side wall of the drive box 1, and a drive column 7 is fixedly connected to the end of the telescopic rod 13 away from the drive box 1. It should be noted that by setting the telescopic rod 13, the drive column 7 can be limited so that it can only move horizontally.

[0027] Reference Figure 3 The drive column 7 has a drive groove 18 and a liquid storage tank 19 on its side wall. The liquid storage tank 19 is filled with magnetorheological fluid, and a piston 21 is slidably connected to it. A drive mechanism for moving the piston 21 is installed in the drive groove 18. The drive mechanism includes a second screw 22 rotatably connected to the inner wall of the drive groove 18, and a drive nut 24 slidably connected to it. The drive nut 24 is threadedly connected to the second screw 22 and is fixedly connected to the piston 21 via a connecting rod 25. A handwheel 23 is fixed to the left end of the second screw 22, and the second screw 22 can be rotated by turning the handwheel 23.

[0028] Reference Figure 1 A rubber cylinder 12 is fixedly connected to the end of the drive column 7 away from the drive box 1, and a through hole 20 is opened on the inner wall of the liquid storage tank 19, which connects the liquid storage tank 19 and the rubber cylinder 12. Two support rods 8 are fixedly connected to the side wall of the drive column 7, and a mounting plate 9 is fixedly connected to the end of each support rod 8 away from the drive column 7. An electromagnetic plate 10 is installed on the side wall of the mounting plate 9. It should be noted that when the upper and lower electromagnetic plates 10 are energized, the opposite magnetic poles face each other, which can form a strong magnetic field between the rubber cylinder 12.

[0029] Reference Figure 2 The drive column 7 is fixedly connected to a threaded cylinder 14 at one end away from the rubber soft cylinder 12. A first screw 15 is threadedly connected to the threaded cylinder 14, and the end of the first screw 15 away from the threaded cylinder 14 extends into the drive box 1. A rotating mechanism that makes the first screw 15 rotate is installed in the drive box 1.

[0030] The rotating mechanism includes a rack 4 slidably connected to the drive housing 1. A first screw 15 is connected to a gear 16 via a one-way bearing 17. Specifically, the first screw 15 is fixedly connected to the inner ring of the one-way bearing 17, while the gear 16 is fixedly connected to the outer ring of the one-way bearing 17. When the gear 16 rotates forward, it can drive the outer ring of the one-way bearing 17 to rotate. At this time, the outer ring of the one-way bearing 17 can drive its inner ring to rotate together, thus driving the first screw 15 to rotate forward. When the gear 16 rotates in reverse, it can also drive the outer ring of the one-way bearing 17 to rotate, but at this time, the outer ring of the one-way bearing 17 cannot drive its inner ring to rotate, so it will not drive the first screw 15 to rotate in reverse. Therefore, when the gear 16 rotates back and forth, under the action of the one-way bearing 17, it can only drive the first screw 15 to rotate forward, thereby unscrewing and extending the first screw 15 from the threaded cylinder 14, and thus pushing the drive column 7 to move to the right in the opposite direction.

[0031] Furthermore, rack 4 meshes with gear 16, and a movable plate 3 is slidably connected inside the drive housing 1. The movable plate 3 is fixedly connected to the bottom of the drive housing 1 by spring 29, and the lower end of rack 4 is fixedly connected to the upper end of movable plate 3. It should be noted that rack 4 and movable plate 3 can be moved downwards by pressing down on rack 4, and the elasticity of spring 29 can be used to move movable plate 3 upwards to return it to its original position.

[0032] A hollow ring 11 is fixedly connected to the circumferential sidewall of the drive column 7 via multiple connecting rods 28, and bristles are fixedly connected to the circumferential sidewall of the hollow ring 11. A one-way air inlet pipe 5 and a one-way air outlet pipe 6, which communicate with the interior of the drive box 1, are installed on the sidewall of the drive box 1, and the one-way air outlet pipe 6 communicates with the interior of the hollow ring 11. Multiple exhaust holes 26 are opened on the circumferential sidewall of the hollow ring 11. The connection points between the one-way air inlet pipe 5 and the one-way air outlet pipe 6 and the drive box 1 are both located at the bottom inner part of the drive box 1, and a one-way shut-off valve is installed inside both the one-way air inlet pipe 5 and the one-way air outlet pipe 6. Specifically, the one-way shut-off valve in the one-way intake pipe 5 restricts air from flowing into the drive box 1 from the outside in one direction, while the one-way shut-off valve in the one-way exhaust pipe 6 restricts air from flowing into the hollow ring 11 from the drive box 1 in one direction. Therefore, when the movable plate 3 moves up, it can only draw air in through the one-way intake pipe 5, and when the movable plate 3 moves down, it can only exhaust air through the one-way exhaust pipe 6, and blow the air into the hollow ring 11, and finally discharge it from the exhaust holes 26 around the hollow ring 11.

[0033] When using this device, it can be as follows: Figure 6 As shown, the drive column 7 and rubber sleeve 12 are inserted into the sampling hole of the drill string 30, and the right end of the rubber sleeve 12 is brought into contact with the left end of the core sample 27 in the sampling hole. Then, the handwheel 23 on the left end of the drive column 7 is rotated, referring to... Figure 3 This causes the second screw 22 to rotate, which in turn moves the drive nut 24 to the right. The drive nut 24 then drives the piston 21 to move to the right synchronously via the connecting rod 25. The piston 21 can then squeeze the magnetorheological fluid in the storage tank 19 into the rubber cylinder 12 through the through hole 20, causing the rubber cylinder 12 to bulge. Since the magnetorheological fluid is in a flowable liquid form and the rubber cylinder 12 is in a soft and easily deformable form, after the magnetorheological fluid is bulged in, the right end face of the rubber cylinder 12 will be squeezed to fit against the left end face of the core, and the right end face of the rubber cylinder 12 will form a shape that perfectly matches the left end face of the core.

[0034] Then, the electromagnetic plates 10 on the upper and lower sides are energized. The two electromagnetic plates 10 can form a strong magnetic field after being energized. The magnetorheological fluid flowing into the rubber soft cylinder 12 can be transformed into a solid form under this strong magnetic field. At the same time, the solidified magnetorheological fluid will also fix the shape of the right end face of the rubber soft cylinder 12, so that it can always match the left end face of the core. Then, repeatedly pressing the rack 4 causes it to move up and down, which in turn drives the gear 16 in the drive box 1 to rotate back and forth. Under the action of the one-way bearing 17, the first screw 15 will only rotate in the same direction. This gradually unscrews the first screw 15 from the threaded cylinder 14, causing the first screw 15 to extend. Since the drive box 1 is fixed by the base plate 2, the continuously extending and unscrewed first screw 15 can push the drive column 7 to the right in the opposite direction. The drive column 7 can drive the rubber soft cylinder 12 to move to the right synchronously. The cured rubber soft cylinder 12 can continuously push the rock core out of the sampling hole of the drill bit 30. Since the right end face of the cured rubber soft cylinder 12 always matches the left end face of the rock core, the thrust can be effectively avoided from being concentrated on the narrow contact surface between the two, which would cause the rock core to break.

[0035] Furthermore, as the drive column 7 moves continuously to the right, it will also drive the hollow ring 11 to move via the connecting rod 28. The bristles on the outer wall of the hollow ring 11 can continuously clean the residual rock powder on the inner wall of the sampling hole of the drill bit 30. In addition, when the rack 4 moves up and down, it will also drive the movable plate 3 to move up and down synchronously. When the movable plate 3 moves up, its lower space increases, which can actively draw in air through the one-way air inlet pipe 5. When the movable plate 3 moves down, the air below it can be blown into the hollow ring 11 through the one-way air outlet pipe 6. The air blown into the hollow ring 11 will be blown out from the exhaust holes 26 around the perimeter. The blown airflow directly acts on the inner wall of the sampling hole of the drill bit 30, which can further promote the rock powder on the inner wall of the sampling hole to fall off.

[0036] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A soil core sampling device for engineering drilling, comprising a drive box (1), characterized in that, A telescopic rod (13) is fixedly connected to the side wall of the drive box (1), and a drive column (7) is fixedly connected to the end of the telescopic rod (13) away from the drive box (1). A drive groove (18) and a liquid storage tank (19) are provided on the side wall of the drive column (7). The liquid storage tank (19) is filled with magnetorheological fluid. A piston (21) is slidably connected in a sealed manner in the liquid storage tank (19). A drive mechanism for moving the piston (21) is installed in the drive groove (18). A rubber tube (12) is fixedly connected to one end of the drive column (7) away from the drive box (1), and a through hole (20) is provided on the inner wall of the liquid storage tank (19). The through hole (20) connects the liquid storage tank (19) and the rubber tube (12). Two support rods (8) are fixedly connected to the side wall of the drive column (7). An installation plate (9) is fixedly connected to one end of each support rod (8) away from the drive column (7). An electromagnetic plate (10) is installed on the side wall of the installation plate (9).

2. The soil core sampling device for engineering drilling according to claim 1, characterized in that, The drive column (7) is fixedly connected to a threaded cylinder (14) at one end away from the rubber cylinder (12). A first screw (15) is threadedly connected inside the threaded cylinder (14), and the end of the first screw (15) away from the threaded cylinder (14) extends into the drive box (1). A rotating mechanism for rotating the first screw (15) is installed inside the drive box (1).

3. The soil core sampling device for engineering drilling according to claim 1, characterized in that, The driving mechanism includes a second screw (22) rotatably connected to the inner wall of the driving groove (18), a driving nut (24) slidably connected in the driving groove (18), and the driving nut (24) threadedly connected to the second screw (22). The driving nut (24) is fixedly connected to the piston (21) through a connecting rod (25).

4. The soil core sampling device for engineering drilling according to claim 2, characterized in that, The rotating mechanism includes a rack (4) slidably connected to the drive box (1), the first screw (15) is connected to a gear (16) through a one-way bearing (17), and the rack (4) meshes with the gear (16). A movable plate (3) is slidably connected inside the drive box (1), and the movable plate (3) is fixedly connected to the bottom of the drive box (1) by a spring (29). The lower end of the rack (4) is fixedly connected to the upper end of the movable plate (3).

5. The soil core sampling device for engineering drilling according to claim 1, characterized in that, The circumferential sidewall of the drive column (7) is fixedly connected to a hollow ring (11) by multiple connecting rods (28), and bristles are fixedly connected to the circumferential sidewall of the hollow ring (11). A one-way air inlet pipe (5) and a one-way air outlet pipe (6) communicating with the interior are installed on the sidewall of the drive box (1), and the one-way air outlet pipe (6) is communicating with the interior of the hollow ring (11). Multiple exhaust holes (26) are opened on the circumferential sidewall of the hollow ring (11).

6. The soil core sampling device for engineering drilling according to claim 5, characterized in that, The connection points between the one-way air inlet pipe (5) and the one-way air outlet pipe (6) and the drive box (1) are both located at the bottom inside the drive box (1), and a one-way shut-off valve is installed inside the one-way air inlet pipe (5) and the one-way air outlet pipe (6).

7. The soil core sampling device for engineering drilling according to claim 5, characterized in that, A base plate (2) is fixedly connected to the side wall of the drive box (1), and the base plate (2) is provided with fixing bolts.

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