Drilling device for coal mine water disaster prevention and control

Abstract

The invention relates to the technical field of coal mine drilling equipment, in particular to a drilling device for coal mine water disaster prevention and control, which comprises a drilling base, a drilling box and a sealing cover plate, the drilling box is fixedly arranged at the top of the drilling base, and the sealing cover plate is fixedly arranged at the top of the drilling box. The rod replacing mechanisms are arranged on the two sides of the interior of the drilling box, automatic assembling and disassembling operation of the rod piece in the drilling process is achieved through the two rod replacing mechanisms, manual assembling operation of the drilled rod piece is not needed, the labor intensity of workers is reduced, and the working efficiency is improved. The problems that the assembling efficiency is low and potential safety hazards exist in the assembling process when the rod pieces are manually assembled are solved, meanwhile, a drilling mechanism is further arranged in the drilling box, and the drilling mechanism is matched with the rod replacing mechanism to achieve automatic assembling and disassembling operation between the drilled rod pieces.

Description

Technical Field

[0001] This invention relates to the field of coal mine drilling equipment technology, specifically a drilling device for the prevention and control of water hazards in coal mines. Background Technology

[0002] As is well known, during coal mining operations, it is necessary to extract water from underground fissures and rock strata to release groundwater, thereby reducing the water hazards in coal mining, preventing groundwater from harming workers in underground mining operations, and reducing the risk of water flow causing rock strata to loosen and leading to mine collapse. Water hazard release work is mainly carried out by opening release holes in the mining area, so that groundwater can be discharged naturally under pressure or by pumping equipment.

[0003] When drilling, the main rod and connecting rod need to be connected and assembled. Currently, manual connection and assembly are usually carried out, which is inefficient. Due to the long length of the connecting rod, there are also certain safety hazards in the assembly and connection process.

[0004] Therefore, we propose a drilling device for the prevention and control of water hazards in coal mines. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a drilling device for coal mine water hazard prevention, which enables automatic assembly and disassembly of the main rod and connecting rod in the drilling device, solving the problems of low assembly efficiency and safety hazards associated with manual drill rod assembly.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a drilling device for coal mine water hazard prevention, comprising a drilling base, a drilling box and a closed cover plate, wherein a drilling box is fixedly installed on the top of the drilling base, and a closed cover plate is fixedly installed on the top of the drilling box; a main rod is rotatably installed inside the drilling box, and a drill bit is fixedly installed at the bottom end of the main rod; a rotating bearing is fixedly installed in the middle of the interior of the drilling base, and the bottom end of the main rod passes through the rotating bearing and the drilling base and extends to the bottom of the drilling base;

[0007] Both sides of the drilling box are equipped with rod changing mechanisms, and the middle of the drilling box is also equipped with a drilling mechanism. The drilling mechanism, in conjunction with the rod changing mechanism, enables automatic assembly and disassembly of drilling rods.

[0008] The rod changing mechanism includes rod changing frames. Both sides of the top of the drilling base are rotatably equipped with rod changing frames, and several connecting rods are placed inside the two rod changing frames. Both sides of the inside of the drilling base are fixedly equipped with first servo motors, and the output shafts of the two first servo motors are respectively fixedly connected to the bottom ends of the two rod changing frames. Several mounting frames are fixedly equipped inside the rod changing frames, and a first servo electric cylinder is fixedly equipped inside the several mounting frames. The drive end of the first servo electric cylinder passes through the rod changing frame and extends to the outside of the rod changing frame, and a clamping block is fixedly equipped at the drive end of the first servo electric cylinder.

[0009] The bottom ends of several of the connecting rods are integrally formed with connecting posts, and the top ends of the main rods and connecting rods are provided with connecting threaded holes that mate with the connecting posts.

[0010] The drilling mechanism includes a fixed frame and a drive frame. Fixed frames are fixedly installed on the front and rear sides inside the drilling box. Movable blocks are slidably installed inside the two fixed frames. A drive frame is fixedly installed between the opposite sides of the two movable blocks. A drilling frame is rotatably installed inside the drive frame. Several second servo electric cylinders are fixedly installed inside the drilling frame. A connecting rod that mates with a limiting hole is fixedly installed at the drive end of each of the several second servo electric cylinders.

[0011] Preferably, the surface of the connecting rod is movably positioned inside the clamping block, and movable clamping plates are movably provided on both sides of the inner wall of the clamping block via miniature electric cylinders.

[0012] Preferably, the outer circumferential surface of the connecting column is movably provided with a plurality of limiting columns, and one end of each of the limiting columns is slidably connected to the interior of the connecting column through an elastic sheet. The inner wall of the connecting threaded hole is provided with a plurality of limiting holes that cooperate with the limiting columns.

[0013] Preferably, each of the plurality of limiting holes has an ejector rod slidably disposed inside by an elastic sheet, wherein the surface of the connecting post is provided with an external thread, and the interior of the connecting thread hole is provided with an arc-shaped groove that cooperates with the limiting post.

[0014] Preferably, each of the two fixed frames has a drive screw rotatably installed inside, and the top ends of the two drive screws are respectively threadedly connected to the interior of the two movable blocks.

[0015] Preferably, a second servo motor is fixedly installed at the bottom of the inner wall of each of the two fixed frames, and the output shafts of the two second servo motors are respectively fixedly connected to the bottom ends of the two drive screws through couplings.

[0016] Preferably, each of the two fixed frames is provided with a sliding groove on one side opposite to the other, and the two sides of the drive frame are slidably connected to the interior of the two sliding grooves respectively.

[0017] Preferably, a third servo motor is fixedly installed on one side of the top of the drive frame, and a drive gear is rotatably installed on one side inside the drive frame. The surface of the drive gear meshes with the surface of the drilling frame for transmission, and one end of the output shaft of the third servo motor is fixedly connected to the inside of the drive gear.

[0018] Compared with existing technologies, it has the following advantages:

[0019] 1. By installing rod-changing mechanisms on both sides inside the drilling box, the automatic assembly and disassembly of rods during drilling is achieved through these two mechanisms. This eliminates the need for manual assembly of drilling rods, reducing labor intensity and solving the problems of low assembly efficiency and safety hazards associated with manual assembly. Simultaneously, a drilling mechanism is also installed inside the drilling box. This mechanism, in conjunction with the rod-changing mechanisms, enables automatic assembly and disassembly of drilling rods. Furthermore, the drilling mechanism drives the drilling rods to perform stable drilling operations, and by limiting the rotation of the upper and lower surfaces of the drilling rods, the safety and stability of the drilling rods during drilling are improved.

[0020] 2. The top end of the connecting rod is limited by a drilling mechanism, and then the surface of the connecting rod is released by controlling two movable clamps. The bottom end of the connecting rod is connected to the top end of the main rod by the drilling mechanism. Then, the output shaft of the first servo motor controls the rod changing frame to rotate, so that the connecting rod on the other side of the rod changing frame is located on the side of the main rod, thereby realizing continuous automatic assembly operation between the connecting rods. The limiting connection between the connecting rod and the main rod is released by the drilling assembly, and the disassembled connecting rod is sent into the interior of the rod changing frame for storage. Compared with manual assembly and disassembly operations between the connecting rod and the main rod, the automatic assembly and disassembly operations between the connecting rod and the main rod achieved by the rod changing frame and the drilling mechanism are not only more efficient, but also safe and stable.

[0021] 3. By setting a connecting post at the bottom of the connecting rod and a connecting threaded hole at the top of the main rod that mates with the connecting post, the connecting post at the bottom of the connecting rod is inserted into the connecting threaded hole at the top of the main rod. The connecting rod moves downward and rotates simultaneously. The connecting post at the bottom of the connecting rod is threaded into the connecting threaded hole. At the same time, the limiting post on the outer circumference of the connecting post slides into the interior of the connecting threaded hole along the arc-shaped groove until the limiting post on the outer circumference of the connecting post mates with the limiting hole inside the connecting threaded hole. This completes the mating connection between the connecting rod and the main rod. This connection method ensures the tightness and firmness of the connection, allowing the drill rod to withstand high-intensity torque and tension during operation. In addition, the mating connection between the limiting post and the limiting hole further improves the connection stability between the connecting rod and the main rod, preventing loosening of the connection during operation and ensuring the connection stability of the drill rod. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a drilling device structure for coal mine water hazard prevention according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the rod changing frame and drilling box structure according to an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the drilling base and the first servo motor structure according to an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the fixing frame and pole changing frame structure according to an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the pole changing frame and mounting frame structure according to an embodiment of the present invention;

[0027] Figure 6 This is a side view of the internal structure of the mounting frame and clamping block according to an embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of the main member and connecting member structure according to an embodiment of the present invention;

[0029] Figure 8 This is a schematic diagram of the fixing frame and drive frame structure according to an embodiment of the present invention;

[0030] Figure 9 This is a top view of the internal structure of the drive frame and drilling frame according to an embodiment of the present invention.

[0031] In the diagram, 1. Drilling base; 2. Drilling box; 3. Enclosed cover plate; 4. Main rod; 5. Drill bit; 6. Rotary bearing; 7. Rod changing frame; 8. Connecting rod; 9. First servo motor; 10. Mounting frame; 11. First servo electric cylinder; 12. Clamping block; 13. Movable clamping plate; 14. Connecting column; 15. Connecting threaded hole; 16. Limiting column; 17. Limiting hole; 18. Ejector rod; 19. Fixed frame; 20. Drive frame; 21. Movable block; 22. Drive screw; 23. Slide groove; 24. Drilling frame; 25. Second servo electric cylinder; 26. Connecting insertion rod; 27. Third servo motor; 28. Drive gear. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Example 1:

[0034] Please see Figures 1 to 9 As shown, a drilling device for coal mine water hazard prevention includes a drilling base 1, a drilling box 2, and a sealing cover 3. The drilling box 2 is fixedly installed on the top of the drilling base 1, and the sealing cover 3 is fixedly installed on the top of the drilling box 2. A main rod 4 is rotatably installed inside the drilling box 2, and a drill bit 5 is fixedly installed at the bottom end of the main rod 4. A rotating bearing 6 is fixedly installed in the middle of the drilling base 1, and the bottom end of the main rod 4 passes through the rotating bearing 6 and the drilling base 1 and extends to the bottom of the drilling base 1.

[0035] Both sides of the drilling box 2 are equipped with rod changing mechanisms. The two rod changing mechanisms realize the automatic assembly and disassembly of rods during the drilling process, eliminating the need for manual assembly of drilling rods, reducing labor intensity, and solving the problems of low assembly efficiency and safety hazards in the assembly process of manual rod assembly.

[0036] The drilling box 2 is also equipped with a drilling mechanism in the middle. The drilling mechanism, together with the rod changing mechanism, enables automatic assembly and disassembly of the drilling rods. In addition, the drilling mechanism can drive the drilling rods to perform stable drilling operations. By limiting the rotation of the upper and lower surfaces of the drilling rods, the safety and stability of the drilling rods during the drilling process are improved.

[0037] Furthermore, the rod changing mechanism includes rod changing frames 7. Both sides of the top of the drilling base 1 are rotatably equipped with rod changing frames 7, and several connecting rods 8 are placed inside the two rod changing frames 7. Both sides of the inside of the drilling base 1 are fixedly equipped with first servo motors 9, and the output shafts of the two first servo motors 9 are respectively fixedly connected to the bottom ends of the two rod changing frames 7. The output shafts of the two first servo motors 9 drive the two rod changing frames 7 to rotate, so that the several connecting rods 8 on the two rod changing frames 7 face one side of the main rod 4, thereby facilitating the automatic assembly between the connecting rods 8 and the main rod 4.

[0038] The rod changing frame 7 has several mounting brackets 10 fixedly installed inside, and each of the mounting brackets 10 has a first servo electric cylinder 11 fixedly installed inside. The drive end of the first servo electric cylinder 11 passes through the rod changing frame 7 and extends to the outside of the rod changing frame 7. The drive end of the first servo electric cylinder 11 is fixedly equipped with a clamping block 12. The surface of the connecting rod 8 is located inside the clamping block 12 and is movably placed. Movable clamping plates 13 are movably installed on both sides of the inner wall of the clamping block 12 through miniature electric cylinders.

[0039] It should be noted that when changing the connecting rod 8, the connecting rod 8 located on one side of the main rod 4 is sent to the top of the main rod 4. The first servo electric cylinder 11 inside the mounting frame 10 drives the clamping block 12 to move to one side of the main rod 4. When the connecting rod 8 is at the top of the main rod 4, the top of the connecting rod 8 is limited by the drilling mechanism. Then, the two movable clamping plates 13 are controlled to release the limitation on the surface of the connecting rod 8. The drilling mechanism drives the bottom of the connecting rod 8 to connect with the top of the main rod 4. Then, the output shaft of the first servo motor 9 controls the rod changing frame 7 to rotate, so that the connecting rod 8 on the other side of the rod changing frame 7 is located on one side of the main rod 4. This allows for continuous automatic assembly of connecting rods 8. When disassembling connecting rods 8, the drive end of the first servo cylinder 11 controls the clamping block 12 to be positioned on the surface of the connecting rod 8. The movable clamping plate 13 inside the clamping block 12 limits and clamps the surface of the connecting rod 8. Finally, the drilling assembly releases the limiting connection between the connecting rod 8 and the main rod 4, and the disassembled connecting rod 8 is sent into the rod changing frame 7 for storage. Compared to manual assembly and disassembly of connecting rods 8 and main rod 4, the automatic assembly and disassembly of connecting rods 8 and main rod 4 is achieved through the rod changing frame 7 in conjunction with the drilling mechanism, which is not only highly efficient but also safe and stable.

[0040] Furthermore, the bottom ends of several connecting rods 8 are integrally formed with connecting posts 14, and the top ends of the main rod 4 and the connecting rods 8 are provided with connecting threaded holes 15 that mate with the connecting posts 14. Several limiting posts 16 are movably arranged on the outer circumferential surface of the connecting posts 14, and one end of each limiting post 16 is slidably connected to the interior of the connecting posts 14 through an elastic sheet. Several limiting holes 17 that mate with the limiting posts 16 are provided on the inner wall of the connecting threaded holes 15, and ejector rods 18 are slidably arranged inside the limiting holes 17 through an elastic sheet. The surface of the connecting posts 14 is provided with external threads, and the interior of the connecting threaded holes 15 is provided with arc-shaped grooves that mate with the limiting posts 16.

[0041] It should be noted that during the assembly of the connecting rod 8 and the main rod 4, the connecting post 14 at the bottom of the connecting rod 8 is inserted into the connecting threaded hole 15 at the top of the main rod 4. The connecting rod 8 is controlled to move downwards while simultaneously rotating. A threaded connection is formed between the connecting post 14 at the bottom of the connecting rod 8 and the connecting threaded hole 15. At the same time, the limiting post 16 on the outer circumference of the connecting post 14 slides along the arc-shaped groove into the interior of the connecting threaded hole 15 until the limiting post 16 on the outer circumference of the connecting post 14 engages with the limiting hole 17 inside the connecting threaded hole 15. This completes the engagement between the connecting rod 8 and the main rod 4. This connection method ensures the tightness and firmness of the connection, allowing the drill pipe to withstand [load / damage] during operation. Under high-intensity torque and tension, and through the cooperation between the limiting post 16 and the limiting hole 17, the connection stability between the connecting rod 8 and the main rod 4 is further improved, preventing the drill rod from loosening at the connection during operation and ensuring the connection stability of the drill rod. When separating the connecting rod 8 and the main rod 4, the drilling mechanism pushes the ejector rods 18 inside several limiting holes 17 inward, and uses the ejector rods 18 to push out the limiting post 16 inside the limiting hole 17. Then, the main rod 4 is controlled to rotate, and the clamping block 12 is used to control the rotation and limit the connecting rod 8, thereby realizing the automatic separation operation between the connecting rod 8 and the main rod 4 without manual drill rod separation.

[0042] Example 2:

[0043] This embodiment discloses the specific structure of the drilling mechanism in Embodiment 1 above. The drilling mechanism includes a fixed frame 19 and a drive frame 20. Fixed frames 19 are fixedly installed on both the front and rear sides inside the drilling box 2. Movable blocks 21 are slidably installed inside each of the two fixed frames 19. Drive screws 22 are rotatably installed inside each of the two fixed frames 19, and the top ends of the two drive screws 22 are threadedly connected to the interior of the two movable blocks 21, respectively. Second servo motors are fixedly installed at the bottom of the inner walls of each of the two fixed frames 19, and the output shafts of the two second servo motors are fixedly connected to the bottom ends of the two drive screws 22 via couplings. A drive frame 20 is fixedly installed between opposite sides of the two movable blocks 21. Slide grooves 23 are provided on opposite sides of each of the two fixed frames 19, and the drive frame... The two sides of the drive frame 20 are slidably connected to the interior of two slide grooves 23 respectively. By allowing the two sides of the drive frame 20 to slide inside the two slide grooves 23 respectively, the stability of the drive frame 20 during the up and down movement is further ensured. A drilling frame 24 is rotatably installed inside the drive frame 20, and several second servo electric cylinders 25 are fixedly installed inside the drilling frame 24. The driving ends of the several second servo electric cylinders 25 are all fixedly provided with connecting rods 26 that cooperate with the limiting holes 17. A third servo motor 27 is fixedly installed on one side of the top of the drive frame 20. A drive gear 28 is also rotatably installed on one side inside the drive frame 20, and the surface of the drive gear 28 meshes with the surface of the drilling frame 24 for transmission. One end of the output shaft of the third servo motor 27 is fixedly connected to the interior of the drive gear 28.

[0044] It should be noted that during the assembly and connection between the connecting rod 8 and the main rod 4, the second servo electric cylinder 25 inside the drilling frame 24 drives the connecting rod 26 to be inserted into the limiting hole 17 at the top of the main rod 4. Then, the drive screws 22 inside the two fixed frames 19 are controlled to rotate, causing the two movable blocks 21 to move downward inside the two fixed frames 19. The two movable blocks 21 drive the drive frame 20 to move downward, while the drive gear 28 drives the drilling frame 24 to rotate, causing the main rod 4 to rotate while moving downward. The drill bit 5 at the bottom of the main rod 4 is used for drilling. The main rod 4 descends into the drilling box. After the lower part of the 2nd part, the connecting rod 8 is sent to the top of the main rod 4 using the rod changing frame 7. The connecting rod 26 inside the drilling frame 24 is controlled to engage with the limiting hole 17 at the top of the connecting rod 8. Then, the connecting rod 8 is controlled to rotate and move downward, so that the connecting post 14 at the bottom of the connecting rod 8 engages with the connecting threaded hole 15 at the top of the main rod 4. Through the drilling mechanism and the rod changing structure, not only can the automatic assembly and connection between the connecting rod 8 and the main rod 4 be realized, but also the automatic disassembly operation between the connecting rod 8 and the main rod 4 can be realized. There is no need for manual rod changing and disassembly operations, which improves the drilling efficiency of the drilling device.

[0045] Example 3:

[0046] This embodiment proposes a drilling method for a drilling device used in coal mine water hazard prevention, specifically including the following steps:

[0047] Step 1: Fix the drilling base 1 in the drilling area using the anchor rod. Drive the connecting rod 26 into the limiting hole 17 at the top of the main rod 4 using the second servo electric cylinder 25 inside the drilling frame 24. Then, control the drive screw 22 inside the two fixed frames 19 to rotate, so that the two movable blocks 21 move downward inside the two fixed frames 19. Drive the drive frame 20 downward through the two movable blocks 21. At the same time, drive the gear 28 to rotate the drilling frame 24, so that the main rod 4 moves downward and rotates at the same time. Use the drill bit 5 at the bottom of the main rod 4 to perform the drilling operation.

[0048] Step 2: After the main rod 4 descends to the bottom of the drilling box 2, the first servo electric cylinder 11 inside the mounting frame 10 drives the clamping block 12 to move to one side of the main rod 4. When the connecting rod 8 is at the top of the main rod 4, the second servo electric cylinder 25 inside the drilling frame 24 drives the connecting rod 26 to be inserted into the limiting hole 17 at the top of the connecting rod 8. Then, the two movable clamping plates 13 are controlled to release the limiting on the surface of the connecting rod 8, and the connecting rod 8 is controlled to rotate downward.

[0049] Step 3: When assembling the connecting rod 8 and the main rod 4, the connecting post 14 at the bottom of the connecting rod 8 is inserted into the connecting threaded hole 15 at the top of the main rod 4. The connecting rod 8 is controlled to move downward and rotate simultaneously. The connecting post 14 at the bottom of the connecting rod 8 is threadedly connected to the connecting threaded hole 15. At the same time, the limiting post 16 on the outer circumference of the connecting post 14 slides into the interior of the connecting threaded hole 15 along the arc-shaped groove until the limiting post 16 on the outer circumference of the connecting post 14 engages with the limiting hole 17 inside the connecting threaded hole 15. This completes the engagement connection between the connecting rod 8 and the main rod 4.

[0050] Step 4: Continue drilling operations by rotating the connecting rod 8 in conjunction with the main rod 4 at the bottom. After the top of the connecting rod 8 descends to the bottom, the output shaft of the first servo motor 9 controls the rod changing frame 7 to rotate, so that the other connecting rod 8 on the rod changing frame 7 is located on one side of the main rod 4. Then, the first servo electric cylinder 11 inside the mounting frame 10 drives the clamping block 12 to move to one side of the main rod 4. When the connecting rod 8 is located at the top of the main rod 4, the drilling mechanism connects and assembles the upper and lower connecting rods 8.

[0051] Step 5: When separating the connecting rod 8 and the main rod 4, the drilling mechanism pushes the ejector rods 18 inside several limiting holes 17 inward, and uses the ejector rods 18 to push out the limiting posts 16 inside the limiting holes 17. Then, the main rod 4 is controlled to rotate, and the clamping block 12 is used to control the rotation and limit the connecting rod 8, thereby realizing the automatic separation operation between the connecting rod 8 and the main rod 4. In conjunction with the drive end of the first servo electric cylinder 11, the clamping block 12 is driven to send the separated connecting rod 8 into the inside of the rod changing frame 7 for storage.

[0052] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0053] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0054] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A drilling device for coal mine water hazard prevention, comprising a drilling base (1), a drilling box (2), and a sealing cover (3), wherein the drilling box (2) is fixedly disposed on the top of the drilling base (1), and the sealing cover (3) is fixedly disposed on the top of the drilling box (2), characterized in that: The drilling box (2) is rotatably equipped with a main rod (4), and a drill bit (5) is fixedly installed at the bottom end of the main rod (4). A rotating bearing (6) is fixedly installed in the middle of the drilling base (1), and the bottom end of the main rod (4) passes through the rotating bearing (6) and the drilling base (1) and extends to the bottom of the drilling base (1). Both sides of the drilling box (2) are equipped with rod changing mechanisms, and the middle of the drilling box (2) is also equipped with a drilling mechanism. The drilling mechanism and the rod changing mechanism are used to realize the automatic assembly and disassembly of the drilling rods. The rod changing mechanism includes a rod changing frame (7). The rod changing frame (7) is rotatably arranged on both sides of the top of the drilling base (1). Several connecting rods (8) are placed inside the two rod changing frames (7). The first servo motor (9) is fixedly arranged on both sides inside the drilling base (1). The output shafts of the two first servo motors (9) are fixedly connected to the bottom ends of the two rod changing frames (7). Several mounting frames (10) are fixedly arranged inside the rod changing frame (7). A first servo electric cylinder (11) is fixedly arranged inside the several mounting frames (10). The driving end of the first servo electric cylinder (11) passes through the rod changing frame (7) and extends to the outside of the rod changing frame (7). A clamping block (12) is fixedly arranged at the driving end of the first servo electric cylinder (11). The bottom ends of several connecting rods (8) are integrally formed with connecting posts (14), and the top ends of the main rod (4) and the connecting rods (8) are provided with connecting thread holes (15) that cooperate with the connecting posts (14). The drilling mechanism includes a fixed frame (19) and a drive frame (20). The fixed frame (19) is fixedly installed on the front and rear sides of the drilling box (2). Movable blocks (21) are slidably installed inside the two fixed frames (19). The drive frame (20) is fixedly installed between the opposite sides of the two movable blocks (21). The drilling frame (24) is rotatably installed inside the drive frame (20). Several second servo electric cylinders (25) are fixedly installed inside the drilling frame (24). The drive ends of the several second servo electric cylinders (25) are fixedly provided with connecting rods (26) that cooperate with the limiting holes (17).

2. The drilling device for coal mine water hazard prevention according to claim 1, characterized in that: The surface of the connecting rod (8) is located inside the clamping block (12) and is movably placed. Movable clamping plates (13) are movably set on both sides of the inner wall of the clamping block (12) through a micro electric cylinder.

3. A drilling device for coal mine water hazard prevention according to claim 1, characterized in that: The outer circumferential surface of the connecting column (14) is provided with a plurality of limiting columns (16), and one end of each limiting column (16) is slidably connected to the interior of the connecting column (14) through an elastic sheet. The inner wall of the connecting threaded hole (15) is provided with a plurality of limiting holes (17) that cooperate with the limiting columns (16).

4. A drilling device for coal mine water hazard prevention according to claim 3, characterized in that: Each of the limiting holes (17) has an ejector rod (18) slidably provided inside through an elastic sheet. The surface of the connecting post (14) is provided with an external thread, and the interior of the connecting thread hole (15) is provided with an arc-shaped groove that cooperates with the limiting post (16).

5. A drilling device for coal mine water hazard prevention according to claim 1, characterized in that: Both of the fixed brackets (19) have drive screws (22) rotatably installed inside, and the top ends of the two drive screws (22) are respectively threaded to the inside of the two movable blocks (21).

6. A drilling device for coal mine water hazard prevention according to claim 5, characterized in that: The bottom of the inner wall of each of the two fixed frames (19) is fixedly provided with a second servo motor, and the output shafts of the two second servo motors are respectively fixedly connected to the bottom ends of the two drive screws (22) through couplings.

7. A drilling device for coal mine water hazard prevention according to claim 1, characterized in that: Each of the two fixed frames (19) has a sliding groove (23) on one side opposite to the other, and the two sides of the drive frame (20) are slidably connected to the interior of the two sliding grooves (23).

8. A drilling device for coal mine water hazard prevention according to claim 1, characterized in that: A third servo motor (27) is fixedly installed on one side of the top of the drive frame (20), and a drive gear (28) is rotatably installed on one side inside the drive frame (20). The surface of the drive gear (28) meshes with the surface of the drilling frame (24) for transmission. One end of the output shaft of the third servo motor (27) is fixedly connected to the inside of the drive gear (28).

Images