A rotary drilling bit retrieval device

Abstract

This invention discloses a rotary drilling bit retrieval device, comprising a drill rod sleeve and a drill bit body. A rigid plate is fixedly connected to the top of the drill bit body, and a hanging hole is provided on the outer wall of the rigid plate. The outer wall of the drill rod sleeve is provided with multiple mounting holes. A probing mechanism is activated to locate the position of the drill bit body and the hanging hole. After the probing mechanism completes its search, a limiting mechanism supports the hook on the upper end of its outer wall to prevent the hook from being squeezed inward by flint and mud in the hole, thus preventing the four hooks from opening to a sufficient diameter and contacting the bottom end of the hook with the upper end of the rigid plate. An adjusting mechanism is then activated to align the hook with the water in the hanging hole. The hook is then moved along the outer side of the rigid plate to its lower part. At this point, the limiting mechanism is removed, allowing the hook to receive the elastic force of a first spring through a coupling, causing the hook to rotate inward and hook into the hanging hole. Finally, the drill rod sleeve is lifted upward, facilitating the retrieval of the drill bit body.

Description

Technical Field

[0001] This invention relates to the technical field of rotary drilling bit retrieval devices. Background Technology

[0002] Rotary drilling is a construction technique suitable for hole-forming operations in building foundation engineering. It is widely used in foundation construction projects such as municipal construction, highway bridges, and high-rise buildings. With different drilling tools, it is suitable for dry or wet drilling operations and drilling operations in rock strata.

[0003] During pile driving, as the rotary drilling rig continues to advance, when hard rock is encountered, the rig will use a tubular drill for excavation. As the drilling depth increases, the rock strength also increases, requiring the operator to continuously increase the torque to drill downwards. However, with increased torque, the drill bit's pin may not be able to withstand the shearing force, potentially leading to breakage. If the drill bit falls off, it is necessary to manually descend into the borehole to attach ropes and hooks to the drill bit's swivel to retrieve it. However, manually descending into the borehole is dangerous and cumbersome, thus reducing the efficiency of drill bit retrieval and consequently affecting the overall construction progress. Summary of the Invention

[0004] The purpose of this invention is to overcome the inconvenience of manually retrieving detached drill bits and to provide a rotary drilling bit retrieval device.

[0005] The technical solution to achieve the above objective is: a rotary drilling bit retrieval device, comprising a drill rod sleeve and a drill bit body. A rigid plate is fixedly connected to the top of the drill bit body, and a hanging hole is provided on the outer wall of the rigid plate. The outer wall of the drill rod sleeve is provided with multiple mounting holes, and the drill rod sleeve is mounted on the drill rod through the mounting holes. A turntable is rotatably connected to the bottom of the drill rod sleeve, and a clamping mechanism is provided at the bottom of the turntable. A limit mechanism is provided on the clamping mechanism. A probing mechanism is fixedly connected to the outer wall of the drill rod sleeve, and an adjustment mechanism is provided on the inner wall of the drill rod sleeve.

[0006] Preferably, the clamping mechanism includes a bolt, a fixing plate, a rotating shaft, a hook, a connecting shaft, and a first spring. The bottom end of the turntable is threadedly connected to the bolt. Four fixing plates arranged in an array are fixedly connected to the outer wall of the bolt. The inner wall of the fixing plate is rotatably connected to the rotating shaft. The outer wall of the rotating shaft is fixedly connected to the hook. The inner wall of the fixing plate is fixedly connected to the first spring. One end of the first spring is fixedly connected to the connecting shaft. One end of the connecting shaft is movably connected to the hook.

[0007] Preferably, the limiting mechanism includes an installation groove, a rotary motor, a connecting rod, a placement groove, a second spring, and a slider. The bottom end of the bolt has an installation groove, the inner wall of the installation groove is fixedly connected to the rotary motor, the output end of the rotary motor is fixedly connected to the connecting rod, each of the four ends of the connecting rod has a placement groove, the inner wall of the placement groove is fixedly connected to the second spring, one end of the second spring is fixedly connected to the slider, and the outer wall of the slider is slidably connected to the placement groove.

[0008] Preferably, the exploration mechanism includes a push rod motor, a connecting plate, a probe, and a through hole. The push rod motor is fixedly connected to the outer wall of the drill rod sleeve. The output end of the push rod motor is fixedly connected to the connecting plate. The bottom end of the connecting plate is fixedly connected to the probe. One of the hooks has a through hole on its outer wall, and the outer wall of the probe passes through the through hole.

[0009] Preferably, the adjustment mechanism includes a servo motor and a fixed disk. The servo motor is fixedly connected to the inner wall of the drill pipe sleeve, the output end of the servo motor is fixedly connected to the fixed disk, and the bottom end of the fixed disk is fixedly connected to the turntable.

[0010] Preferably, the fixing plate is U-shaped, the first spring is located above the fixing plate, and the contact end of the connecting shaft and the hook is located at the upper end of the hook.

[0011] Preferably, the connecting rod is cross-shaped, the outer wall of the slider is fitted with a rubber pad, and the outer wall of the slider is provided with an inclined surface.

[0012] Preferably, a protective shell is fixedly connected to the outer wall of the drill pipe sleeve, and the push rod motor and the connecting plate are both inside the protective shell.

[0013] The beneficial effects of this invention are:

[0014] 1) Screw the bolts into the turntable to facilitate the disassembly and installation of the clamping mechanism, fixing the clamping mechanism on the turntable. When the drill rod pushes the drill rod sleeve downward, activate the probing mechanism to locate the position of the drill bit body and the hanging hole. After the probing mechanism finishes its search, it is supported on the upper end of the hook's outer wall by the limiting mechanism to prevent the hook from being squeezed inward by the flint and mud in the hole, which would prevent the four hooks from opening to a sufficient diameter, so that the bottom end of the hook contacts the direct upper end of the hard plate. Activate the adjusting mechanism to align the hook with the hanging hole. Then, move it along the outside of the hard plate to the bottom of the hard plate. At this point, remove the limiting mechanism, so that the hook receives the elastic force of the first spring through the coupling, causing the hook to rotate inward and hook into the hanging hole. Finally, lift the drill rod sleeve upward, making it easy to lift the drill bit body.

[0015] 2) Start the rotary motor. The rotary motor drives the connecting rod to rotate. When the connecting rod drives the slider to rotate, the slider is inclined on the outer wall of the slider, which causes the slider to move into the placement slot and compress the second spring. In this way, the slider will hold the hook against the inside of the hook, so that when the hook is on the hard plate surface, the diameter of the hook opening is smaller than that of the hard plate. When the hook moves to the bottom of the hard plate, rotate the connecting rod to move the slider out, so that the slider and connecting rod are staggered from the hook, so as to avoid interfering with the inward contraction of the hook.

[0016] 3) Start the probe and push rod motor. The push rod motor drives the connecting plate to move, and the connecting plate drives the probe to move. The probe detects and finds the position of the drill bit body and the hanging hole. The video information is displayed on the electronic screen. At this time, after the limit mechanism stops, the servo motor is started, which drives the fixed plate to rotate the turntable, thereby rotating the bolt. Then, the vertical position of the hook is adjusted through the fixed plate and the rotating shaft to ensure that the hook is aligned with the hanging hole. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 This is a top view of the structure of the present invention;

[0019] Figure 3 This is a top view of the cross-sectional structure of the present invention;

[0020] Figure 4 This is a side view schematic diagram of the cross-sectional structure of the present invention;

[0021] Figure 5 This is an exploded structural diagram of the present invention;

[0022] Figure 6 yes Figure 4 Enlarged structural diagram at point A;

[0023] Figure 7 yes Figure 5 A magnified structural diagram at point B in the middle.

[0024] 1. Drill rod sleeve; 2. Mounting hole; 3. Turntable; 4. Clamping mechanism; 401. Bolt; 402. Fixing plate; 403. Rotating shaft; 404. Hook; 405. Connecting shaft; 406. First spring; 5. Limiting mechanism; 501. Mounting groove; 502. Rotary motor; 503. Connecting rod; 504. Placement groove; 505. Second spring; 506. Slider; 6. Exploration mechanism; 601. Push rod motor; 602. Connecting plate; 603. Probe; 604. Through hole; 7. Adjustment mechanism; 701. Servo motor; 702. Fixing plate; 8. Drill bit body; 9. Hard plate; 10. Hanging hole. Detailed Implementation

[0025] The technical solution of the present invention will now be clearly and completely described in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] The invention will now be further described with reference to the accompanying drawings.

[0027] Reference Appendix Figure 1-7 A rotary drilling bit retrieval device includes a drill rod sleeve 1 and a drill bit body 8. A rigid plate 9 is fixedly connected to the top of the drill bit body 8. A hanging hole 10 is provided on the outer wall of the rigid plate 9. A plurality of mounting holes 2 are provided on the outer wall of the drill rod sleeve 1. The drill rod sleeve 1 is mounted on the drill rod through the mounting holes 2. A turntable 3 is rotatably connected to the bottom of the drill rod sleeve 1. A clamping mechanism 4 is provided at the bottom of the turntable 3. A limit mechanism 5 is provided on the clamping mechanism 4. A probing mechanism 6 is fixedly connected to the outer wall of the drill rod sleeve 1. An adjustment mechanism 7 is provided on the inner wall of the drill rod sleeve 1. The structure of the clamping mechanism 4, which mounts the drill rod sleeve 1 on the drill rod, is made of 20mm steel plate.

[0028] Reference Appendix Figure 1-6 The clamping mechanism 4 includes a bolt 401, a fixing plate 402, a rotating shaft 403, a hook 404, a connecting shaft 405, and a first spring 406. The bottom end of the turntable 3 is threadedly connected to the bolt 401. Four fixed plates 402 arranged in an array are fixedly connected to the outer wall of the bolt 401. The inner wall of the fixing plate 402 is rotatably connected to the rotating shaft 403. The outer wall of the rotating shaft 403 is fixedly connected to the hook 404. The inner wall of the fixing plate 402 is fixedly connected to the first spring 406. One end of the first spring 406 is fixedly connected to the connecting shaft 405. One end of the connecting shaft 405 is movably connected to the hook 404. The fixing plate 402 is U-shaped. The first spring 406 is located above the fixing plate 402. The contact end of the connecting shaft 405 with the hook 404 is located at the upper end of the hook 404.

[0029] Screw bolt 401 into turntable 3 to facilitate disassembly and installation of clamping mechanism 4, fixing clamping mechanism 4 on turntable 3. When drill rod pushes drill rod sleeve 1 downward, activate probing mechanism 6 to locate the position of drill body 8 and hanging hole 10. After probing by probing mechanism 6, limit mechanism 5 supports the upper end of hook 404 to prevent hook 404 from being squeezed inward by flint and mud in the hole, causing the four hooks 404 to not open to a sufficient diameter, so that the bottom end of hook 404 contacts the upper end of hard plate 9. Activate adjustment mechanism 7 to align hook 404 with hanging hole 10. Then, move along the outside of hard plate 9 to the bottom of hard plate 9. At this time, remove limit mechanism 5, so that hook 404 receives the elastic force of first spring 406 through coupling shaft 405, causing hook 404 to rotate inward, thus hooking into hanging hole 10. Then, lift drill rod sleeve 1 upward, making it easy to lift drill body 8.

[0030] Reference Appendix Figure 3-6 The limiting mechanism 5 includes a mounting groove 501, a rotary motor 502, a connecting rod 503, a placement groove 504, a second spring 505, and a slider 506. The bottom end of the bolt 401 is provided with a mounting groove 501. The inner wall of the mounting groove 501 is fixedly connected to the rotary motor 502. The output end of the rotary motor 502 is fixedly connected to the connecting rod 503. Placement grooves 504 are provided at all four ends of the connecting rod 503. The inner wall of the placement groove 504 is fixedly connected to the second spring 505. One end of the second spring 505 is fixedly connected to the slider 506. The outer wall of the slider 506 is slidably connected to the placement groove 504. The connecting rod 503 is cross-shaped. The outer wall of the slider 506 is fitted with a rubber pad and has an inclined surface.

[0031] Start the rotary motor 502, which drives the connecting rod 503 to rotate. When the connecting rod 503 drives the slider 506 to rotate, the slider 506 moves into the placement groove 504 due to the inclined surface on its outer wall, and compresses the second spring 505. In this way, the slider 506 will hold the hook 404 against the inside of the hook 404, preventing the diameter of the hook 404 from being smaller than that of the hard plate 9 when it is on the surface of the hard plate 9. When the hook 404 moves to the bottom of the hard plate 9, rotate the connecting rod 503 to move the slider 506 out, so that the slider 506 and the connecting rod 503 are staggered from the hook 404, avoiding interference with the inward retraction of the hook 404.

[0032] Reference Appendix Figure 1-3The exploration mechanism 6 includes a push rod motor 601, a connecting plate 602, a probe 603, and a through hole 604. The push rod motor 601 is fixedly connected to the outer wall of the drill pipe sleeve 1. The output end of the push rod motor 601 is fixedly connected to the connecting plate 602. The bottom end of the connecting plate 602 is fixedly connected to the probe 603. One of the hooks 404 has a through hole 604 on its outer wall. The outer wall of the probe 603 passes through the through hole 604. A protective shell is fixedly connected to the outer wall of the drill pipe sleeve 1. The push rod motor 601 and the connecting plate 602 are both inside the protective shell.

[0033] Reference Appendix Figure 3 The adjustment mechanism 7 includes a servo motor 701 and a fixed plate 702. The servo motor 701 is fixedly connected to the inner wall of the drill pipe sleeve 1. The output end of the servo motor 701 is fixedly connected to the fixed plate 702. The bottom end of the fixed plate 702 is fixedly connected to the turntable 3.

[0034] The probe 603 and push rod motor 601 are activated. The push rod motor 601 drives the connecting plate 602 to move, and the connecting plate 602 drives the probe 603 to move, so that the probe 603 can detect and find the position of the drill body 8 and the hanging hole 10. The video information is displayed on the electronic screen. At this time, after the limit mechanism 5 is limited, the servo motor 701 is activated, so that the fixed plate 702 drives the turntable 3 to rotate, thereby driving the bolt 401 to rotate. Then, the vertical position of the hook 404 is adjusted through the fixed plate 402 and the rotating shaft 403 to ensure that the hook 404 is aligned with the hanging hole 10.

[0035] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rotary drilling bit retrieval device, comprising a drill rod sleeve (1) and a drill bit body (8), wherein a rigid plate (9) is fixedly connected to the top end of the drill bit body (8), and a hanging hole (10) is provided on the outer wall of the rigid plate (9); a plurality of mounting holes (2) are provided on the outer wall of the drill rod sleeve (1), and the drill rod sleeve (1) is mounted on the drill rod through the mounting holes (2), characterized in that, The bottom end of the drill pipe sleeve (1) is rotatably connected to a turntable (3), the bottom end of the turntable (3) is provided with a clamping mechanism (4), the clamping mechanism (4) is provided with a limit mechanism (5), the outer wall of the drill pipe sleeve (1) is fixedly connected with a probing mechanism (6), and the inner wall of the drill pipe sleeve (1) is provided with an adjusting mechanism (7). The clamping mechanism (4) includes a bolt (401), a fixing plate (402), a rotating shaft (403), a hook (404), a connecting shaft (405), and a first spring (406). The bottom end of the turntable (3) is threaded with a bolt (401). The outer wall of the bolt (401) is fixedly connected with four arrayed fixing plates (402). The inner wall of the fixing plate (402) is rotatably connected with a rotating shaft (403). The outer wall of the rotating shaft (403) is fixedly connected with a hook (404). The inner wall of the fixing plate (402) is fixedly connected with a first spring (406). One end of the first spring (406) is fixedly connected with a connecting shaft (405). One end of the connecting shaft (405) is movably connected to the hook (404). The limiting mechanism (5) includes an installation groove (501), a rotary motor (502), a connecting rod (503), a placement groove (504), a second spring (505), and a slider (506). The bottom end of the bolt (401) is provided with an installation groove (501). The inner wall of the installation groove (501) is fixedly connected to the rotary motor (502). The output end of the rotary motor (502) is fixedly connected to the connecting rod (503). Placement grooves (504) are provided at all four ends of the connecting rod (503). The inner wall of the placement groove (504) is fixedly connected to the second spring (505). One end of the second spring (505) is fixedly connected to the slider (506). The outer wall of the slider (506) is slidably connected to the placement groove (504). The exploration mechanism (6) includes a push rod motor (601), a connecting plate (602), a probe (603), and a through hole (604). The push rod motor (601) is fixedly connected to the outer wall of the drill sleeve (1). The output end of the push rod motor (601) is fixedly connected to the connecting plate (602). The bottom end of the connecting plate (602) is fixedly connected to the probe (603). One of the hooks (404) has a through hole (604) on its outer wall. The outer wall of the probe (603) passes through the through hole (604).

2. The rotary drilling bit retrieval device according to claim 1, characterized in that, The adjustment mechanism (7) includes a servo motor (701) and a fixed disk (702). The servo motor (701) is fixedly connected to the inner wall of the drill pipe sleeve (1). The output end of the servo motor (701) is fixedly connected to the fixed disk (702). The bottom end of the fixed disk (702) is fixedly connected to the turntable (3).

3. The rotary drilling bit retrieval device according to claim 1, characterized in that, The fixed plate (402) is U-shaped, the first spring (406) is located above the fixed plate (402), and the contact end of the connecting shaft (405) and the hook (404) is located at the upper end of the hook (404).

4. A rotary drilling bit retrieval device according to claim 1, characterized in that, The connecting rod (503) is cross-shaped, the outer wall of the slider (506) is fitted with a rubber pad, and the outer wall of the slider (506) is provided with an inclined surface.

5. A rotary drilling bit retrieval device according to claim 1, characterized in that, The outer wall of the drill pipe sleeve (1) is fixedly connected to a protective shell, and the push rod motor (601) and the connecting plate (602) are both inside the protective shell.

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