A centering drill rig of the rotary drilling rig type

Abstract

The present invention provides a centering drill rig of the rotary drilling rig type, which includes the combination of a drill pipe, a positioning block and a guide groove, improving the extraction efficiency of the drill bit. Without having to lift the entire drill pipe, the drill bit can be quickly extracted through the steel wire rope of the hoisting winch, significantly reducing the time and power consumption during the drill bit removal process. In addition, through the quick connection and disassembly of the connecting rod and the drill pipe, the cumbersome operations during the traditional drill pipe replacement are avoided, ensuring the efficient utilization of the drill pipe and the continuity of the operation. The configuration of the universal coupling enables the drill pipe to adapt to the drilling requirements at various angles, improving the operation flexibility. The perfusion channel provided inside the drill pipe can inject mud or compressed air into the drill hole according to the operation requirements, which helps to improve the drill hole environment and the operation quality. Overall, this application effectively solves the deficiencies of the existing drill pipe structure in terms of operation efficiency, safety and adaptability, and improves the utilization rate of the drill rig equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of rotary drilling rigs, and particularly to a centering drilling rig of the rotary drilling rig type. Background Art

[0002] The existing drill pipe structure of the rotary drilling rig usually adopts the way of passing through the power head, and the drill bit is fixed at the bottom end of the drill pipe. During the drilling operation, due to the fixed connection method between the drill bit and the drill pipe, it leads to great limitations in use, specifically manifested as follows:

[0003] Due to the fixed connection between the power head and the drill pipe in the existing drill pipe structure, when the drill bit is taken out, the entire drill pipe must be pulled out of the drill hole. This operation method takes a long time and is complex, especially more significant in deep hole drilling operations, seriously affecting the construction progress and operation efficiency. The process of taking out the drill bit consumes a large amount of time and power consumption, affecting the construction efficiency and the continuity of the operation.

[0004] The long-term fixed connection between the drill bit and the drill pipe causes problems such as loosening and damage at the connection part, affecting the accurate positioning and operation stability of the drill bit, thereby reducing the safety and reliability of the operation. In deep hole drilling operations, the problems of stability and reliability are more prominent, especially in the case of continuous long-term operation, it is more likely to cause mechanical failures or safety accidents of the drill pipe and the drill bit.

[0005] The telescopic structure design of the existing drill pipe of the rotary drilling rig makes the outer diameter of the drill pipe gradually decrease, the strength of each section of the drill pipe is not uniform, the processing difficulty is large, it is easy to be damaged, and the maximum extended length of the drill pipe is fixed, which limits the drilling depth; and the telescopic drill pipe can only be used with its supporting power head, and the maximum output power of the power head is not adjustable, and the use scenario is limited greatly.

[0006] The existing drill pipe structure usually cannot flexibly adapt to the drilling requirements of different angles. Especially in deep hole drilling operations under complex geological conditions, the limitation of the drilling angle reduces the construction efficiency and flexibility. Especially in some narrow spaces or special drilling environments, the existing drill pipe structure cannot effectively achieve multi-angle drilling, and the adaptability of the operation is restricted.

[0007] The inside of the drill pipe usually does not have a perfusion channel, and it is impossible to inject mud or compressed air into the drill hole during the drilling process, resulting in the ineffective improvement of the drilling environment, the difficulty in guaranteeing the drilling quality, and affecting the drilling efficiency and construction quality.

[0008] Therefore, improving the drill pipe structure and enhancing the efficiency of drill bit extraction and drill pipe replacement have become urgent technical problems to be solved in the current engineering machinery equipment field. Summary of the Invention

[0009] Aiming at the above-mentioned technical deficiencies, the purpose of the present invention is to provide a centering drill rig in the form of a rotary drilling rig, which improves the efficiency of bit extraction, simplifies the operation of drill pipe replacement, and enhances the operation stability.

[0010] To achieve the above purpose, the present invention adopts the following technical solutions:

[0011] A centering drill rig in the form of a rotary drilling rig is installed on a mast, and a main winch is provided on the mast, including:

[0012] A bracket, slidably installed on the mast and connected to the steel wire rope of the main winch;

[0013] A power box, fixed on the bracket, for providing rotational driving force;

[0014] A rotating body, rotatably installed on the power box and driven by the power box to rotate; a lifting winch is installed on the rotating body;

[0015] A connecting rod, installed at the lower end of the rotating body;

[0016] A drill pipe, detachably connected to the lower end of the connecting rod;

[0017] A drill bit, detachably sleeved and installed on the drill pipe; the steel wire rope of the lifting winch is connected to the drill bit.

[0018] Preferably, the power box includes a box body, a rotating shaft and at least one driving unit; the box body is fixed on the bracket; the driving unit is fixed on the box body; the rotating shaft is rotatably installed on the box body and is in transmission connection with the driving unit; the driving unit is any one of a driving motor or an electric motor.

[0019] Preferably, the rotating body includes a turntable, a pull rod and a universal coupling; the turntable is fixedly connected to the lower end of the rotating shaft; the pull rod is fixed to the lower end of the turntable; the axes of the pull rod, the turntable and the rotating shaft are collinear; the upper end of the universal coupling is connected to the lower end of the pull rod; the upper end of the connecting rod is connected to the lower end of the universal coupling.

[0020] Preferably, a plurality of drill pipes are provided; including a rod body and a first joint; the first joint is fixedly arranged at one end of the rod body; the cross-sectional shape of the first joint is a regular polygon; a slot adapted to the first joint is provided at the other end of the rod body; a first jack is provided on the first joint; a second jack adapted to the first jack is provided on the rod body; the first joint of the drill pipe is inserted into the slot of another adjacent drill pipe, and the adjacent two drill pipes are connected and fixed by inserting a pin into the first jack and the second jack.

[0021] Preferably, a second joint adapted to the slot is fixedly arranged on the connecting rod; a third jack is arranged on the second joint; the second joint of the connecting rod is inserted into the slot of the adjacent drill pipe, and the drill pipe and the connecting rod are fixedly connected by inserting a pin into the third jack and the first jack.

[0022] Preferably, a perfusion channel is arranged inside the drill pipe, and the perfusion channel runs through the drill pipe along the axial direction of the drill pipe.

[0023] Preferably, a guiding groove is arranged on the outer wall of the drill pipe, and the guiding groove extends along a direction parallel to the axis of the drill pipe; a positioning groove is arranged on the outer wall of one end of the drill pipe close to the first joint, and the positioning groove is located on one side of the guiding groove and communicated with the guiding groove; a positioning block adapted to the guiding groove and the positioning groove is arranged on the drill bit, and the positioning block can slide in the guiding groove; when the positioning block slides along the guiding groove to the positioning groove, the drill pipe rotates, and the positioning block is clamped in the positioning groove to fix the drill bit on the drill pipe; when the drill pipe rotates in the reverse direction, the positioning block slides from the positioning groove to the guiding groove.

[0024] Preferably, the drill bit includes a cylinder body, a guiding sleeve, a cover plate, a baffle plate and a locking unit; the guiding sleeve penetrates through the cylinder body and is fixedly connected with the cylinder body; the axis of the guiding sleeve is collinear with the axis of the cylinder body; the positioning block is fixed on the inner wall of the guiding sleeve; the steel wire rope of the lifting hoist is connected to the upper end of the cylinder body; an opening is arranged at the bottom of the cylinder body, and the cover plate is hinged at the bottom of the cylinder body and buckles on the opening; a through hole for the guiding sleeve to pass through is arranged in the middle of the cover plate, and the lower end of the guiding sleeve passes through the through hole and extends below the cover plate; the locking unit includes a control rod and a hook head; the control rod is slidably arranged on the cylinder body; the middle of the hook head is hinged and installed inside the cylinder body, one end is hinged and connected with the control rod, and the other end is integrally provided with a locking block; a lock catch is fixedly arranged on the cover plate; when the cover plate buckles on the opening of the cylinder body, the control rod is pulled towards the outside of the cylinder body, driving the hook head to rotate, and the locking block is inserted and fixed in the lock catch; a slag inlet hole is arranged on the cover plate; an annular groove is arranged on the outer side surface of the bottom of the guiding sleeve, and the annular groove is located below the cover plate; the baffle plate is located below the cover plate, covers the slag inlet hole, and one end is slidably inserted and installed in the annular groove; excavation teeth are fixedly arranged on the lower end surface of the baffle plate; a limiting block adapted to the baffle plate is fixedly arranged on the lower end surface of the cover plate.

[0025] Preferably, a diversion pipe is fixedly arranged inside the cylinder body, and the axis of the diversion pipe is parallel to the axis of the cylinder body; a first diversion port communicated with the diversion pipe is arranged at the upper end of the cylinder body; a second diversion port corresponding to the diversion pipe is arranged on the cover plate.

[0026] Preferably, a rod changing device is further included; the rod changing device includes a push rod unit, a rod changing platform and a rod feeding unit; the push rod unit includes a push rod base and a push rod oil cylinder; the push rod base is fixed on the bracket; the push rod oil cylinder is fixed on the push rod base; the piston rod of the push rod oil cylinder is arranged towards the connecting rod; an operation hole adapted to the drill pipe is arranged on the rod changing platform; a clamping unit is arranged on one side of the operation hole; the clamping unit includes a vertical shaft, a support rod and two clamping oil cylinders; the vertical shaft is rotatably installed on the rod changing platform; the support rod is vertically fixed on one side of the upper end of the vertical shaft; the two clamping oil cylinders are symmetrically fixed on the support rod; the piston rods of the two clamping oil cylinders are arranged close to each other; a clamping block is fixedly arranged on the piston rod of the clamping oil cylinder; the rod feeding unit includes a base, a guide seat, an angle adjusting oil cylinder and a push rod oil cylinder; the base is fixed on the rod changing platform; the guide seat is hinged to one end of the base far away from the rod changing platform; one end of the angle adjusting oil cylinder is hinged to the base and the other end is hinged to the guide seat; a push rod groove is arranged on the guide seat; the push rod groove extends towards the axis direction of the operation hole; the push rod oil cylinder is fixed in the push rod groove, and the piston rod of the push rod oil cylinder is arranged towards the axis direction of the operation hole.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0028] Improve the extraction efficiency of the drill bit: Through the cooperation of the positioning block and the guide groove in the drill pipe structure of this application, the drill bit can be quickly positioned and locked in the drill pipe. Without having to extract the entire drill pipe from the borehole, the drill bit can be extracted by the steel wire rope of the hoisting winch, greatly reducing the time and labor costs in the process of removing the drill bit and significantly improving the operation efficiency.

[0029] Reduce the drill pipe replacement time: The drill pipes can be quickly connected and disassembled through the cooperation of the joint and the slot, avoiding the complex operations and large time consumption in the frequent replacement of drill pipes in the traditional method, ensuring the efficient utilization of drill pipes and the continuity of operations. The length of the drill pipe is not limited by the structure of the power head, and the application scenario range is wider.

[0030] Improve the operation stability and safety: The drill pipe structure in the present invention avoids the loosening or damage phenomenon caused by the long-term fixed connection between the drill bit and the drill pipe, improves the connection stability between the drill bit and the drill pipe, and thus enhances the safety and reliability of the operation.

[0031] Adapt to various drilling angle requirements: Through the configuration of the universal coupling, the drill pipe can perform drilling operations at different angles, expanding the adaptability of the drilling operation, especially suitable for deep hole drilling operations in special operation environments.

[0032] Support the function of injecting mud or compressed air: The perfusion channel arranged inside the drill pipe can inject mud or compressed air into the borehole according to the operation requirements, which helps to improve the borehole environment and the operation quality. Brief Description of the Drawings

[0033] Figure 1 Schematic diagram of the usage state of the present invention;

[0034] Figure 2 Schematic diagram of the structure of the present invention;

[0035] Figure 3 Schematic diagram of the connection relationship among the bracket, power box, rotating body, connecting rod and drill pipe in the present invention;

[0036] Figure 4 Schematic diagram of the connection relationship among the power box, rotating body and connecting rod in the present invention;

[0037] Figure 5 Schematic diagram of the structure of the drill pipe in the present invention;

[0038] Figure 6 Schematic diagram of the structure of the drill bit in the present invention;

[0039] Figure 7 Three-dimensional structure diagram of the drill bit in the present invention;

[0040] Figure 8 Internal structure diagram of the drill bit in the present invention.

[0041] Wherein:

[0042] 1. Mast; 2. Main hoist; 3. Drill bit; 31. Cylinder body; 32. Cover plate; 33. Excavation teeth; 34. Guide sleeve; 35. Positioning block; 36. Control rod; 37. Slag inlet; 38. Hook head; 39. Diversion pipe; 310. Lock; 311. Baffle; 312. Limit block; 4. Drill pipe; 41. Positioning groove; 42. First joint; 43. Guide groove; 44. Slot; 5. Pipe changing platform; 6. Base; 7. Guide seat; 8. Angle adjusting oil cylinder; 9. Rotating body; 10. Power box; 101. Hoisting winch; 102. Universal coupling; 103. Tie rod; 104. Turntable; 105. Box body; 106. Driving unit; 107. Rotating shaft; 11. Bracket; 12. Working hole; 13. Connecting rod; 131. Second joint; 14. Vertical shaft; 15. Support rod; 16. Push rod oil cylinder; 17. Push rod base; 18. Cutting head. Detailed Description of the Invention

[0043] The present invention will be further described below with reference to the accompanying drawings.

[0044] As Figures 1 to 8 shown, a centering drill of the rotary drilling rig type is installed on the mast 1 of the rotary drilling rig, and a main hoist 2 is arranged on the mast 1, including:

[0045] The bracket 11 is slidably mounted on the mast 1 and connected to the steel wire rope of the main hoist 2. The bracket 11 is pulled by the main hoist 2 to slide on the mast 1;

[0046] The power box 10 is fixed on the bracket 11 and is used to provide rotational driving force;

[0047] The rotating body 9 is rotatably mounted on the power box 10 and is driven to rotate by the power box 10; a hoisting winch 101 is mounted on the rotating body 9, and the hoisting winch 101 rotates synchronously with the rotating body 9; there are two hoisting winches 101, which are symmetrically arranged on the rotating body 9 with the axis of the rotating body 9 as the center;

[0048] The connecting rod 13 is mounted at the lower end of the rotating body 9;

[0049] The drill pipe 4 is detachably connected to the lower end of the connecting rod 13, and the axes of the drill pipe 4 and the connecting rod 13 are collinear; a cutting head 18 is mounted at one end of the drill pipe 4 away from the rotating body 9. The cutting head 18 is an existing component and is used for cutting soil and rock during drilling;

[0050] The drill bit 3 is detachably sleeved on the drill pipe 4; the steel wire rope of the hoisting winch 101 is connected to the drill bit 3. When the steel wire rope of the hoisting winch 101 is wound up, the drill bit 3 is lifted upward along the axis direction of the drill pipe 4. When the steel wire rope of the hoisting winch 101 is unwound, the drill bit 3 falls along the axis direction of the drill pipe 4 under the action of gravity.

[0051] In this embodiment, the power box 10 includes a box body 105, a rotating shaft 107 and at least one driving unit 106; the number of driving units 106 is set according to the requirements of the operating environment to optimize the efficiency of the driving system; the box body 105 is fixed on the bracket 11; the driving unit 106 is fixed on the box body 105; the rotating shaft 107 is rotatably mounted on the box body 105 and is in transmission connection with the driving unit 106; the driving unit 106 and the rotating shaft 107 are connected by gears. After the driving unit 106 is started, it drives the rotating shaft 107 to rotate; the driving unit 106 is any one of a driving motor or an electric motor.

[0052] In this embodiment, the rotating body 9 includes a turntable 104, a pull rod 103 and a universal coupling 102; the turntable 104 is fixedly connected to the lower end of the rotating shaft 107; the pull rod 103 is fixed at the lower end of the turntable 104; the axes of the pull rod 103, the turntable 104 and the rotating shaft 107 are collinear; the upper end of the universal coupling 102 is connected to the lower end of the pull rod 103; the upper end of the connecting rod 13 is connected to the lower end of the universal coupling 102; the setting of the universal coupling 102 allows the drill pipe 4 to freely adjust the angle during drilling operations at different angles. The universal coupling 102 is a positionable universal coupling.

[0053] In this embodiment, the cross-sectional shape of the drill pipe 4 is circular or polygonal; a plurality of drill pipes 4 are provided; each drill pipe 4 includes a rod body and a first joint 42; the first joint 42 is fixedly arranged at one end of the rod body; the cross-sectional shape of the first joint 42 is a regular polygon; a slot 44 adapted to the first joint 42 is arranged at the other end of the rod body; a first socket is arranged on the first joint 42; a second socket adapted to the first socket is arranged on the rod body; the first joint 42 of the drill pipe 4 is inserted into the slot 44 of another adjacent drill pipe 4, and adjacent two drill pipes 4 are connected and fixed by inserting a pin into the first socket and the second socket. The cutting head 18 is installed at the end position of the drill pipe 4 farthest from the rotating body 9.

[0054] According to the depth requirement of the drilling, drill pipes 4 are added during the operation process to increase the drilling depth. After the operation is completed, the drill pipes 4 are lifted and disassembled step by step. The specific operation is as follows:

[0055] Adding drill pipes 4: Insert the first joint 42 of the newly taken drill pipe 4 into the slot 44 of the drill pipe 4 in the borehole, and insert a pin to complete the connection of the two drill pipes 4;

[0056] Disassembling drill pipes 4: Lift the drill pipe 4 in the borehole upward until the top end of the next drill pipe 4 is exposed from the borehole, take out the pin, and complete the disassembly of the upper drill pipe 4.

[0057] In this embodiment, a second joint 131 adapted to the slot 44 is fixedly arranged on the connecting rod 13; a third socket is arranged on the second joint 131; the second joint 131 of the connecting rod 13 is inserted into the slot 44 of the adjacent drill pipe 4, and the drill pipe 4 and the connecting rod 13 are connected and fixed by inserting a pin into the third socket and the first socket.

[0058] The specific operations of adding and disassembling drill pipes 4 during the operation process:

[0059] Install a section of drill pipe 4 on the connecting rod 13, install the drill bit 3 on this drill pipe 4, and drill a hole as the drill pipe 4 rotates. When the second joint 131 of the connecting rod 13 reaches the top position of the borehole, take out the pin, pull up the bracket 11 by the main hoist 2 to separate the connecting rod 13 from the drill pipe 4, take a new drill pipe 4 and install it on the connecting rod 13. The bracket 11 continues to move upward to make the new drill pipe 4 in a vertical state. The bracket 11 moves downward to insert the first joint 42 of the upper drill pipe 4 into the slot 44 of the lower drill pipe 4, and insert a pin to complete the connection of the two drill pipes 4.

[0060] When disassembling the drill pipe 4, the bracket 11 pulls the drill pipe 4 upward until the first joint 42 of the topmost section of the drill pipe 4 is exposed from the borehole. Remove the pin at this position, separate the two sections of the drill pipe 4 at this position, push the upper drill pipe 4 to tilt while the bracket 11 slowly moves downward. After laying the drill pipe 4 flat, remove the pin at the connection between the drill pipe 4 and the connecting rod 13, move away the disassembled drill pipe 4, and then the bracket 11 continues to move downward until the second joint 131 is inserted into the slot 44 of the drill pipe 4 in the borehole. Insert the pin to connect the connecting rod 13 and the drill pipe 4. Repeat the above steps to complete the step-by-step disassembly of the drill pipe 4.

[0061] In this embodiment, a perfusion channel is provided inside the drill pipe 4, and the perfusion channel runs through the drill pipe 4 along the axial direction of the drill pipe 4; according to the operation requirements, mud or compressed air can be injected into the borehole through the perfusion channel.

[0062] In this embodiment, a guiding groove 43 is provided on the outer wall of the drill pipe 4, and the guiding groove 43 extends along a direction parallel to the axis of the drill pipe 4; a positioning groove 41 is provided on the outer wall of one end of the drill pipe 4 close to the first joint 42, and the positioning groove 41 is located on one side of the guiding groove 43 and communicates with the guiding groove 43; a positioning block 35 adapted to the guiding groove 43 and the positioning groove 41 is provided on the drill bit 3, and the positioning block 35 is slidably placed in the guiding groove 43; when the positioning block 35 slides along the guiding groove 43 to the positioning groove 41, the drill pipe 4 rotates, and the positioning block 35 is clamped in the positioning groove 41 to fix the drill bit 3 on the drill pipe 4; when the drill pipe 4 rotates in the reverse direction, the positioning block 35 slides from the positioning groove 41 to the guiding groove 43. When the positioning block 35 is clamped in the positioning groove 41, the first joint 42 at the lower end of the drill pipe 4 is located inside the drill bit 3, ensuring that the drill bit 3 first contacts the area to be drilled.

[0063] In this embodiment, the drill bit 3 includes a cylinder body 31, a guide sleeve 34, a cover plate 32, a baffle plate 311 and a locking unit; the guide sleeve 34 penetrates through the cylinder body 31 and is fixedly connected to the cylinder body 31, and both ends of the guide sleeve 34 extend to the outside of the cylinder body 31; the axis of the guide sleeve 34 is collinear with the axis of the cylinder body 31; the positioning block 35 is fixed on the inner wall of the guide sleeve 34; the drill pipe 4 is arranged through the guide sleeve 34; the steel wire rope of the hoisting winch 101 is connected to the upper end of the cylinder body 31; an opening is provided at the bottom of the cylinder body 31, and the cover plate 32 is hinged to the bottom of the cylinder body 31 and buckled on the opening; a through hole for the guide sleeve 34 to pass through is provided in the middle of the cover plate 32, and the lower end of the guide sleeve 34 passes through the through hole and extends below the cover plate 32; the locking unit includes a control rod 36 and a hook head 38; the control rod 36 is slidably arranged on the cylinder body 31; the middle of the hook head 38 is hinged and installed inside the cylinder body 31, one end is hinged to the control rod 36, and a locking block is integrally provided at the other end; a lock catch 310 is fixedly arranged on the cover plate 32; when the cover plate 32 is buckled on the opening of the cylinder body 31, the control rod 36 is pulled towards the outside of the cylinder body 31, driving the hook head 38 to rotate, and the locking block is inserted and fixed in the lock catch 310. After the locking block disengages from the lock catch 310, the cover plate 32 can be rotated and opened, facilitating the pouring out of the waste residue inside the cylinder body 31; a slag inlet hole 37 is provided on the cover plate 32; an annular groove is provided on the outer side surface of the bottom of the guide sleeve 34, and the annular groove is located below the cover plate 32; the baffle plate 311 is located below the cover plate 32, covers the slag inlet hole 37, and one end is slidably inserted and installed in the annular groove; a digging tooth 33 is fixedly arranged on the lower end surface of the baffle plate 311; a limiting block 312 adapted to the baffle plate 311 is fixedly arranged on the lower end surface of the cover plate 32. During the excavation operation, the excavation is carried out by the digging tooth 33. At this time, the baffle plate 311 will slide in the annular groove until one end abuts against the limiting block 312. At this time, the slag inlet hole 37 on the cover plate 32 is opened, and the excavated soil enters the inside of the cylinder body 31 through the slag inlet hole 37 and is collected. When the cylinder body 31 rotates in the reverse direction, the baffle plate 311 resets, and the baffle plate 311 blocks the slag inlet hole 37, restricting the soil in the cylinder body 31.

[0064] In this embodiment, a diversion pipe 39 is fixedly arranged inside the cylinder body 31, and the axis of the diversion pipe 39 is parallel to the axis of the cylinder body 31; a first diversion port communicating with the diversion pipe 39 is provided at the upper end of the cylinder body 31; a second diversion port corresponding to the diversion pipe 39 is provided on the cover plate 32. The diversion pipe 39 serves as a water permeable hole, enabling the slurry above the drill bit 3 to flow to the lower part of the drill bit 3 through this water permeable hole, so as to reduce the vacuum pumping phenomenon, which is beneficial to reducing the lifting force and reducing the phenomenon of hole collapse.

[0065] In this embodiment, it further includes a rod changing device; the rod changing device includes a push rod unit, a rod changing platform 5 and a rod feeding unit; the push rod unit includes a push rod base 17 and a push rod oil cylinder 16; the push rod base 17 is fixed on the bracket 11; the push rod oil cylinder 16 is fixed on the push rod base 17; the piston rod of the push rod oil cylinder 16 is arranged towards the connecting rod 13; an operation hole 12 adapted to the drill rod 4 is arranged on the rod changing platform 5; a clamping unit is arranged on one side of the operation hole 12; the clamping unit includes a vertical shaft 14, a support rod 15 and two clamping oil cylinders; the vertical shaft 14 is rotatably installed on the rod changing platform 5; the support rod 15 is vertically fixed on one side of the upper end of the vertical shaft 14; the two clamping oil cylinders are symmetrically fixed on the support rod 15; the piston rods of the two clamping oil cylinders are arranged close to each other; a clamping block is fixedly arranged on the piston rod of the clamping oil cylinder; the rod feeding unit includes a base 6, a guide seat 7, an angle adjusting oil cylinder 8 and a rod feeding oil cylinder; the base 6 is fixed on the rod changing platform 5; the guide seat 7 is hinged to one end of the base 6 away from the rod changing platform 5; one end of the angle adjusting oil cylinder 8 is hinged on the base 6 and the other end is hinged on the guide seat 7; a push rod groove is arranged on the guide seat 7; the push rod groove extends towards the axis direction of the operation hole 12; the rod feeding oil cylinder is fixed in the push rod groove, and the piston rod of the rod feeding oil cylinder is arranged towards the axis direction of the operation hole 12. When adding the drill rod 4, the drill rod 4 at the drilling position is clamped by the clamping blocks of the two clamping oil cylinders, the drill rod 4 to be added is placed in the push rod groove, the slot 44 end is placed at the end towards the drilling hole, the bracket 11 drives the connecting rod 13 to move to a predetermined height, the piston rod of the push rod oil cylinder 16 extends, pushing the second joint 131 of the connecting rod 13 towards the drill rod 4 to be added, the rod feeding oil cylinder pushes the drill rod 4 to be added towards the direction of the second joint 131 of the connecting rod 13, the second joint 131 is inserted into the slot 44 of the drill rod 4 to be added, and is fixed by pin connection. The bracket 11 moves upward to lift the drill rod 4 to be added to a vertical state, and then the bracket 11 moves downward to connect the two drill rods 4 to complete the process of adding the drill rod 4.

[0066] Usage method:

[0067] Installation and commissioning

[0068] Install the rotary drilling rig type centering drill on the mast 1 of the rotary drilling rig, and ensure that the main hoist 2 of the mast 1 is connected to the main power system of the drill.

[0069] Drilling operation

[0070] Start the power box 10 to drive the drive unit 106, driving the rotating shaft 107, the rotating body 9, the connecting rod 13 and the drill rod 4 to rotate.

[0071] The main hoist 2 pulls the bracket 11 downward through the steel wire rope for drilling operation.

[0072] Adding and removing the drill rod 4

[0073] According to the drilling depth requirement, use the rod-changing device to complete the installation and removal of the drill rod 4:

[0074] The push rod oil cylinder 16 pushes the connecting rod 13 to tilt, facilitating the docking with the new drill rod 4; the clamping unit ensures the fixation of the drill rod 4 in the borehole.

[0075] The rod feeding oil cylinder pushes out the new drill rod 4, and the pin fixes and connects the new drill rod 4 and the connecting rod 13 to complete the smooth replacement of the drill rod 4.

[0076] Muck cleaning

[0077] The slag inlet hole 37 of the drill bit 3 guides the muck generated during the drilling process into the cylinder body 31 for storage.

[0078] Open the locking unit to clean the muck inside the cylinder body 31.

[0079] Operation precautions

[0080] Check the stability of all connection points and locking mechanisms to ensure the safe operation of the equipment during drilling.

[0081] Adjust the motor parameters in the power box 10 according to the operating environment and drilling depth to optimize the drilling efficiency.

Claims

1. A rotary drilling rig type centering drilling rig, mounted on a mast (1), on which a main winch (2) is arranged, characterized in that: include: A bracket (11) is slidably mounted on the mast (1) and connected to a steel wire rope of a main winch (2); A power box (10) is fixed on the bracket (11) and is used to provide a rotational driving force; The rotating body (9) is rotatably mounted on the power box (10) and driven to rotate by the power box (10); a lifting winch (101) is mounted on the rotating body (9); A connecting rod (13) mounted on the lower end of the rotating body (9); A drill rod (4) detachably connected to the lower end of the connecting rod (13); The drill bit (3) is detachably sleeved and mounted on the drill rod (4); the steel wire rope of the lifting winch (101) is connected to the drill bit (3); The drill rod (4) is configured in multiple pieces; it includes a rod body and a first joint (42); the first joint (42) is fixedly arranged at one end of the rod body; A guide groove (43) is provided on the outer wall of the drill rod (4), and the guide groove (43) extends in a direction parallel to the axis of the drill rod (4); a positioning groove (41) is provided on the outer wall of one end of the drill rod (4) close to the first joint (42), and the positioning groove (41) is located on one side of the guide groove (43) and is connected to the guide groove (43); a positioning block (35) is provided on the drill bit (3) and is matched with the guide groove (43) and the positioning groove (41), and the positioning block (35) is slidably placed in the guide groove (43); The drill bit (3) comprises a barrel (31), a guide sleeve (34), a cover plate (32), a baffle (311) and a locking unit.

2. A rotary drilling rig type centering drill according to claim 1, characterized in that: The power box (10) comprises a box body (105), a rotating shaft (107) and at least one driving unit (106); the box body (105) is fixed on the bracket (11); the driving unit (106) is fixed on the box body (105); the rotating shaft (107) is rotatably mounted on the box body (105) and is drivingly connected to the driving unit (106); the driving unit (106) is a driving motor.

3. A rotary drilling rig type centering drill according to claim 2, characterized in that: The rotating body (9) includes a turntable (104), a pull rod (103) and a universal joint (102); the turntable (104) is fixedly connected to the lower end of the rotating shaft (107); the pull rod (103) is fixed to the lower end of the turntable (104); the axes of the pull rod (103), the turntable (104) and the rotating shaft (107) are collinear; the upper end of the universal joint (102) is connected to the lower end of the pull rod (103); and the upper end of the connecting rod (13) is connected to the lower end of the universal joint (102).

4. A rotary drilling rig type centering drill according to claim 1, characterized in that: The cross-sectional shape of the first joint (42) is a regular polygon; the other end of the rod body is provided with a slot (44) adapted to the first joint (42); the first joint (42) is provided with a first plug hole; the rod body is provided with a second plug hole adapted to the first plug hole; the first joint (42) of the drill rod (4) is plugged into the slot (44) of another adjacent drill rod (4), and the two adjacent drill rods (4) are connected and fixed by inserting a pin into the first plug hole and the second plug hole.

5. A rotary drilling rig type centering drill according to claim 4, characterized in that: The connecting rod (13) is fixedly provided with a second joint (131) adapted to the slot (44); the second joint (131) is provided with a third plug hole; the second joint (131) of the connecting rod (13) is plugged into the slot (44) of the adjacent drill rod (4), and the drill rod (4) and the connecting rod (13) are connected and fixed by inserting a pin into the third plug hole and the first plug hole.

6. The rotary drilling rig type centering drill according to claim 1, characterized in that: The drill rod (4) is provided with a perfusion channel inside, and the perfusion channel is provided through the drill rod (4) along the axial direction of the drill rod (4).

7. A rotary drilling rig type centering drill according to claim 4, characterized in that: The positioning block (35) slides along the guide groove (43) to the positioning groove (41); the drill rod (4) rotates, and the positioning block (35) is engaged in the positioning groove (41) to fix the drill bit (3) on the drill rod (4); the drill rod (4) rotates in the opposite direction, and the positioning block (35) slides from the positioning groove (41) to the guide groove (43).

8. A rotary drilling rig type centering drill according to claim 7, characterized in that: The guide sleeve (34) passes through the cylinder (31) and is fixedly connected to the cylinder (31); the axis of the guide sleeve (34) and the axis of the cylinder (31) are collinear; the positioning block (35) is fixed on the inner wall of the guide sleeve (34); the steel wire rope of the lifting winch (101) is connected to the upper end of the cylinder (31); the bottom of the cylinder (31) is provided with an opening, and the cover plate (32) is hinged on the bottom of the cylinder (31) and snapped on the opening; the middle part of the cover plate (32) is provided with a through hole for accommodating the guide sleeve (34) to pass through, and the lower end of the guide sleeve (34) passes through the through hole and extends to the bottom of the cover plate (32); the locking unit includes a control rod (36) and a hook head (38); the control rod (36) is slidably arranged on the cylinder (31); the middle part of the hook head (38) is hingedly installed in the cylinder (31), and one end is connected to the control rod ( 36) is hingedly connected, and a locking block is integrally provided at the other end; a lock buckle (310) is fixedly provided on the cover plate (32); when the cover plate (32) is buckled on the opening of the cylinder (31), the control rod (36) is pulled toward the outside of the cylinder (31), driving the hook head (38) to rotate, and the locking block is inserted and fixed in the lock buckle (310); a slag inlet hole (37) is provided on the cover plate (32); an annular groove is provided on the outer side surface of the bottom of the guide sleeve (34), and the annular groove is located below the cover plate (32); a baffle (311) is located below the cover plate (32), covers the slag inlet hole (37), and one end is slidably inserted and installed in the annular groove; an excavation tooth (33) is fixedly provided on the lower end surface of the baffle (311); a limit block (312) adapted to the baffle (311) is fixedly provided on the lower end surface of the cover plate (32).

9. A rotary drilling rig type centering drill according to claim 8, characterized in that: A flow guide pipe (39) is fixedly arranged inside the cylinder (31), and the axis of the flow guide pipe (39) is parallel to the axis of the cylinder (31); a first flow guide port connected to the flow guide pipe (39) is arranged at the upper end of the cylinder (31); and a second flow guide port corresponding to the flow guide pipe (39) is arranged on the cover plate (32).

10. The rotary drilling rig type centering drill according to claim 1, characterized in that: It also includes a rod changing device; the rod changing device includes a push rod unit, a rod changing platform (5) and a rod feeding unit; the push rod unit includes a push rod base (17) and a push rod cylinder (16); the push rod base (17) is fixed on the bracket (11); the push rod cylinder (16) is fixed on the push rod base (17); the piston rod of the push rod cylinder (16) is arranged toward the connecting rod (13); an operation hole (12) adapted to the drill rod (4) is arranged on the rod changing platform (5); a clamping unit is arranged on one side of the operation hole (12); the clamping unit includes a vertical shaft (14), a support rod (15) and two clamping cylinders; the vertical shaft (14) is rotatably mounted on the rod changing platform (5); the support rod (15) is vertically fixed on one side of the upper end of the vertical shaft (14); two clamping cylinders are arranged on the rod changing platform (5); The tightening cylinders are symmetrically fixed on the support rod (15); the piston rods of the two clamping cylinders are arranged close to each other; a clamping block is fixedly arranged on the piston rod of the clamping cylinder; the rod feeding unit comprises a base (6), a guide seat (7), an angle adjustment cylinder (8) and a push rod cylinder (16); the base (6) is fixed on the rod changing platform (5); the guide seat (7) is hingedly connected to one end of the base (6) away from the rod changing platform (5); one end of the angle adjustment cylinder (8) is hingedly connected to the base (6), and the other end is hingedly connected to the guide seat (7); a push rod groove is arranged on the guide seat (7); the push rod groove extends toward the axial direction of the working hole (12); the push rod cylinder (16) is fixed in the push rod groove, and the piston rod of the push rod cylinder (16) is arranged toward the axial direction of the working hole (12).

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