Self-correcting intelligent raise boring machine

Abstract

The invention relates to the technical field of raise boring machines, in particular to a self-correcting intelligent raise boring machine. Comprising a drill rod and a cutter head, a cone seat is arranged on the cutter head, a cone is mounted on the cone seat, the buffer device comprises a fourth groove body arranged on the cone seat, a cone shaft is arranged in the fourth groove body, a bearing is arranged on the cone shaft, the bearing is connected with a push rod, and the push rod is connected with the cutter head. The push rod is sleeved with a fourth spring, connected with a supporting plate and penetrates through the supporting plate. The connecting rod device comprises a swing rod connected with the push rod, a third groove body is formed in the swing rod, the swing rod is connected with a cutter head through a shaft, a second groove body is formed in the cutter head, the swing rod penetrates through the second groove body, and a rolling wheel is arranged on the swing rod; the drill bit correcting device has the advantages that the drill bit can be corrected, the working efficiency is high, and the buffering and impacting effects are achieved.

Description

Technical Field

[0001] This invention belongs to the field of reverse drilling rig technology, and in particular relates to a self-correcting intelligent reverse drilling rig. Background Technology

[0002] Raise-the-well rigs are mainly used in industries such as vertical shafts, inclined shafts, surge tanks, ventilation shafts, and drainage shafts in hydropower projects, ventilation shafts in railway construction, and slag chutes in mines. The drill bit is the most important component of the entire raise-the-well rig. A typical drill bit includes a cutterhead, cutter holder, and cutter rollers. The cutter holder is mounted on the cutterhead, and the cutter rollers are mounted on the cutter holder. The distribution and structure of the cutter rollers have a significant impact on the efficiency and stability of rock breaking.

[0003] Currently, riser drilling rigs are prone to jamming during operation because when the drill bit gets stuck, it cannot be corrected.

[0004] A patent publication number (CN107905736B) was found, entitled "Drill Bit for Floating Raise-the-Well Rig," which specifically discloses a floating raise-the-well rig drill bit, including a cutterhead, a cutter holder, floating cutters, a connecting shaft, and transverse floating springs. The cutter holder has a U-shaped structure and is fixed on the cutterhead. Multiple floating cutters are provided on both the cutter holder and the inner side of the cutter holder. The floating cutters are installed inside the cutter holder. The two ends of the connecting shaft are installed on both sides inside the cutter holder. The floating cutters are rotatably sleeved on the connecting shaft. A floating gap is provided between the two sides of the floating cutters and the inner side of the cutter holder. Multiple transverse floating springs are provided. Two transverse floating springs are respectively sleeved on both ends of the connecting shaft and distributed on both sides of the floating cutters. The transverse floating springs are installed in an elastically compressed state between the side of the floating cutter and the inner side of the cutter holder. This invention achieves a dual floating effect in both the horizontal and vertical directions, increases the self-correcting floating capability of the floating cutter 3, and greatly improves the rock-breaking efficiency.

[0005] Analysis of the publicly available materials shows that the drill bit increases the drill bit's correction capability, but relies on the floating spring to affect the equipment's working efficiency, only playing a buffering role. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides a self-correcting intelligent reverse drilling rig that not only corrects the drill bit but also offers high working efficiency and provides buffering and impact mitigation effects.

[0007] To address the aforementioned technical problems, this invention provides a self-correcting intelligent reverse drilling rig, comprising a drill pipe and a cutterhead, wherein a roller cone seat is provided on the cutterhead, and roller cones are mounted on the roller cone seat, and further comprising... A buffer device, comprising a fourth groove disposed on a toothed cone seat, a toothed cone shaft disposed in the fourth groove, a bearing disposed on the toothed cone shaft, a push rod connected to the bearing, a fourth spring sleeved on the push rod, and a support plate connected to the push rod and passing through the support plate; A linkage device, the linkage device including a swing rod connected to a push rod, the swing rod having a third groove, the swing rod being connected to a cutter head via a shaft, the cutter head having a second groove, the swing rod passing through the second groove, and a roller being provided on the swing rod; A triggering device includes a movable plate that is in contact with a roller. The lower end of the movable plate is connected to a first groove. A trigger rod is also provided at the lower end of the movable plate. A sensor is provided on one side of the trigger rod. The sensor is located on the lower end face of the cutter head. The correction device includes a power supply box disposed on the lower end face of the cutter head, a motor disposed in the power supply box, a first gear connected to the motor, a second gear connected to the first gear, a connecting shaft disposed on the second gear, a cam disposed on the connecting shaft, a piston rod connected to the cam, a piston rod connected to the piston, and the piston contacting the bottom of the toothed gear seat.

[0008] The beneficial effects of the above solution are as follows: By integrating the buffer device, linkage device, triggering device, and straightening device, when the drill bit encounters hard rock or gets stuck, the buffer device can first absorb the impact force to prevent damage to the core components. Then, the linkage device converts the displacement of the drill bit into mechanical transmission, which drives the triggering device to activate the sensor. Finally, the straightening device is activated to apply an active impact force to the drill bit seat. Automatic correction of the drill bit position can be achieved without manual intervention, ensuring the continuity of construction. At the same time, the straightening device can not only correct the position through periodic impacts, but also assist in breaking hard rocks and improve rock breaking efficiency. Moreover, the four devices are integrated into the cutterhead and drill bit seat, with a compact structure, strong resistance to harsh working conditions, low failure rate, and no need to change the main structure of the drilling rig. It can be directly adapted to existing equipment.

[0009] Furthermore, the gear holder is U-shaped, the fourth groove is located on both sides and extends through both sides of the gear holder, the outer side of the gear holder is provided with a guide rail, the guide rail is connected to a bearing, and the bearing can move in the guide rail, the inner ring of the bearing is fixedly connected to the gear shaft, and the gear shaft and the gear are fixedly connected.

[0010] The beneficial effects of the above scheme are as follows: by defining the gear carrier as U-shaped, the fourth groove penetrating both sides of the gear carrier, setting a guide rail on the outer side of the gear carrier and allowing the bearing to move within the guide rail, and fixing the inner ring of the bearing to the gear shaft and the gear shaft to the gear, the stability and transmission effectiveness of the buffer device are further optimized. The U-shaped gear carrier provides a stable installation space for the gear shaft, and the through-type fourth groove ensures that the gear shaft is subjected to balanced force at both ends, avoiding unilateral offset that affects the buffering effect; the cooperation between the guide rail and the bearing strictly limits the movement trajectory of the bearing, allowing it to move up and down along the guide rail only, preventing the bearing from tilting and causing the gear shaft to jam, and ensuring smooth buffering action.

[0011] Furthermore, the upper end of the push rod is fixedly connected to the outer ring of the bearing, the support plate and the gear seat are fixedly connected, the push rod extends downward after passing through the support plate and passes through the cutter head, the fourth spring is set between the support plate and the bearing, a baffle is provided at the lower part of the push rod, the diameter of the baffle is larger than the third groove, and the lower end of the push rod passes through the third groove.

[0012] The beneficial effects of the above scheme are as follows: the fixed connection between the push rod and the outer ring of the bearing enables the complete transmission of the buffer displacement of the gear shaft to the push rod, avoiding power loss during transmission and ensuring the effectiveness of subsequent mechanical linkage; the support plate provides a stable support point for the fourth spring, keeping the compression and reset path of the fourth spring fixed, ensuring uniform buffering force, and preventing spring skewing that could lead to buffering failure. The diameter of the baffle plate at the bottom of the push rod is larger than that of the third groove, which effectively prevents the push rod from falling out of the third groove of the swing rod, ensuring the continuity of the linkage transmission. The design of the push rod passing through the support plate and the cutter head further limits the movement trajectory of the push rod, reduces offset, and improves the overall stability of the device structure and the accuracy of transmission.

[0013] Furthermore, the swing rod has a hole, and a shaft is installed inside the hole. The shaft is fixedly installed in the second groove. The swing rod rotates around the shaft. The upper end of the swing rod is connected to a roller through a pin. The roller is vertically installed.

[0014] Furthermore, the movable plate is vertically arranged and in contact with the roller. The lower end of the movable plate is connected to a slider with a width greater than that of the first groove. There are two sliders. The lower end of the slider is connected to a trigger rod through a rod that passes through the first groove. The trigger rod is horizontally arranged.

[0015] Furthermore, a first spring is connected to one side of the slider, and a first fixing plate is fixedly connected to the tail end of the first spring. The first fixing plate is disposed on the upper end surface of the cutter head.

[0016] Furthermore, a gap is left between the lower end face of the gear holder and the upper end face of the cutter head. Second fixing plates are provided on both sides of the gear holder. The second fixing plates have holes, and guide rods are provided in the holes. The lower end of the guide rod is fixedly connected to the cutter head. A second spring is sleeved on the guide rod. A cap is provided at the upper end of the guide rod. The second spring is located between the cap and the second fixing plate.

[0017] Furthermore, the sensor is fixedly mounted on the lower end face of the cutter head, and the sensor is positioned in the direction of horizontal movement of the trigger rod. After the trigger rod touches the sensor, a trigger signal is transmitted. The sensor is equipped with a connecting wire, which is connected to the power supply box.

[0018] Furthermore, a connecting shaft is fixedly mounted on the center surface of the second gear. The connecting shaft passes through the power supply box and connects to a cam. The connecting shaft and the cam are fixedly connected. The cam is connected to a piston rod via a pin. A connecting plate is hinged to the end of the piston rod. The connecting plate is located at the end of the piston.

[0019] Furthermore, a piston cylinder is provided on the outside of the piston. The piston cylinder is vertically arranged, and its upper end is connected to the lower end face of the cutter head. The piston cylinder passes through the cutter head and terminates at the upper end face of the cutter head.

[0020] The beneficial effects of the above-described technical solution of the present invention are as follows: By integrating a buffer device, a linkage device, a triggering device, and a correction device, the buffer device can absorb the impact force immediately when the drill bit encounters hard rock or gets stuck, effectively protecting core components such as the drill bit and its shaft from damage. Subsequently, the linkage device converts the displacement of the drill bit into a stable mechanical transmission, driving the triggering device to accurately trigger a signal, which in turn drives the correction device to start, completing the automatic correction of the drill bit position without manual intervention. At the same time, the correction device does not simply achieve position correction. It uses a motor, gears, and cams to drive a piston to generate periodic impact movements. While correcting the position of the drill bit, it also uses the impact force to assist in breaking hard rock, significantly improving the overall efficiency of drilling operations and achieving an organic unity of equipment protection, intelligent correction, and efficient rock breaking. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 A schematic diagram of the internal structure after the cover is removed; Figure 3 This is a structural schematic diagram of a single drilling rig component; Figure 4 for Figure 3 Enlarged view of section A; Figure 5 for Figure 3 Enlarged view of section B; Figure 6 for Figure 3 A structural diagram from another perspective; Figure 7 for Figure 6 Enlarged view of section C; Figure 8 for Figure 3 A structural diagram from another perspective; Figure 9 for Figure 8 Enlarged view of section D in the middle; Figure 10 for Figure 3 A structural diagram from another perspective; Figure 11 for Figure 10 Enlarged view of section E in the middle; In the diagram: 1. Drill rod; 2. Cutterhead; 3. Cover; 4. Gear holder; 5. Gear; 6. First groove; 7. Second groove; 8. Slider; 9. First spring; 10. First fixed plate; 11. Moving plate; 12. Swing rod; 13. Roller; 14. Second fixed plate; 15. Guide rod; 16. Second spring; 17. Cap; 18. Trigger rod; 19. Sensor; 20. Connecting wire; 21. Power supply box; 22. Third spring; 23. Third groove; 24. Push rod; 25. Baffle; 26. Motor; 270. First gear; 271. Second gear; 28. Piston cylinder; 29. ​​Piston; 30. Connecting plate; 31. Piston rod; 32. Cam; 33. Connecting shaft; 34. Guide rail; 35. Bearing; 36. Gear shaft; 37. Fourth spring; 38. Support plate; 39. Fourth groove. Detailed Implementation

[0022] 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0023] like Figures 1 to 11 As shown: Example 1

[0024] A self-correcting intelligent reverse drilling rig includes a drill pipe 1 and a cutterhead 2. A roller cone seat 4 is provided on the cutterhead 2, and roller cones 5 are mounted on the roller cone seat 4. The rig also includes a buffer device, which includes a fourth groove 39 on the roller cone seat 4. A roller cone shaft 36 is disposed in the fourth groove 39, and a bearing 35 is disposed on the roller cone shaft 36. A push rod 24 is connected to the bearing 35, and a fourth spring 37 is sleeved on the push rod 24. The push rod 24 is connected to and passes through a support plate 38. A linkage device includes a swing rod 12 connected to the push rod 24. A third groove 23 is provided on the swing rod 12, which is connected to the cutterhead 2 via a shaft. A second groove 7 is provided on the cutterhead 2, and the swing rod 12 passes through the second groove 7. A roller is disposed on the swing rod 12. Roller 13; Triggering device, the triggering device includes a movable plate 11 that is in contact with the roller 13, the lower end of the movable plate 11 is connected to a first groove 6, the lower end of the movable plate 11 is also provided with a trigger rod 18, a sensor 19 is provided on one side of the trigger rod 18, the sensor 19 is provided on the lower end face of the cutter head 2; Correction device, the correction device includes a power supply box 21 provided on the lower end face of the cutter head 2, the power supply box 21 is provided with a motor 26, the motor 26 is connected to a first gear 270, the first gear 270 is connected to a second gear 271, the second gear 271 is provided with a connecting shaft 33, the connecting shaft 33 is provided with a cam 32, the cam 32 is connected to a piston rod 29, the piston rod 29 is connected to a piston 29, the piston 29 is in contact with the bottom of the toothed gear seat 4.

[0025] In this embodiment, drill pipe 1 is mounted on a drilling rig. A cutter head 2 and a cover 3 are mounted on the lower end of drill pipe 1. Several evenly distributed roller cone seats 4 are provided on the cutter head 2, and roller cones 5 are mounted on the roller cone seats 4. To prevent the roller cones 5 from getting stuck or damaged during drilling, a buffer device is installed on the roller cone seats 4. Specifically, the buffer device includes a fourth groove 39 on the roller cone seat 4. A roller cone shaft 36 is provided in the fourth groove 39. The two ends of the roller cone shaft 36 are bearings 35. The bearings 35 are connected to push rods 24. A fourth spring 37 is sleeved on the push rod 24. The lower end of the fourth spring 37 is connected to a support plate 38. By setting up the buffer device, the roller cones 5 can effectively buffer during operation.

[0026] In order to connect with the correction device, a linkage device is also provided. The linkage device includes a swing rod 12, which is connected to a push rod 24. A third groove 23 is provided on the swing rod 12, and the push rod 24 is inserted into the third groove 23. The swing center of the swing rod 12 is an axis, which is set on the cutter head 2, specifically in the second groove 7 set on the cutter head 2. A roller 13 is also provided on the swing rod 12.

[0027] The triggering device is used to trigger the action of the correction device. The triggering device includes a movable plate 11 that is in contact with the roller 13. The lower end of the movable plate 11 is connected to the first groove 6. The lower end of the movable plate 11 is also provided with a trigger rod 18. A sensor 19 is provided on one side of the trigger rod 18. The sensor 19 is located on the lower end face of the cutter head 2.

[0028] The straightening device achieves positional correction through impact. Without affecting the operation of the roller cone 5, it uses a jogging method to achieve drilling work. Compared with straightening devices that only have a buffering effect, it does not affect work efficiency, but instead improves drilling efficiency. Example 2

[0029] The gear seat 4 is U-shaped, and the fourth groove 39 is located on both sides and extends through both sides of the gear seat 4. The outer side of the gear seat 4 is provided with a guide rail 34, and the guide rail 34 is connected to a bearing 35, which can move in the guide rail 34. The inner ring of the bearing 35 is fixedly connected to the gear shaft 36, and the gear shaft 36 and the gear 5 are fixedly connected.

[0030] Unlike the above embodiments, in this embodiment, the gear seat 4 is U-shaped, the fourth groove 39 is a through groove, and is set on the plates on both sides of the gear seat 4. The outer side of the plates on both sides of the gear seat 4 is fixedly provided with guide rails 34, which are used for the movement of the bearing 35. Example 3

[0031] The upper end of the push rod 24 is fixedly connected to the outer ring of the shaft 33 bearing. The support plate 38 and the toothed wheel seat 4 are fixedly connected. The push rod 24 extends downward after passing through the support plate 38 and passes through the cutter head 2. The fourth spring 37 is located between the support plate 38 and the bearing 35. A baffle 25 is provided at the lower part of the push rod 24. The diameter of the baffle 25 is larger than that of the third groove 23. The lower end of the push rod 24 passes through the third groove 23.

[0032] Unlike the above embodiments, in this embodiment, the push rod 24 is connected to the outer ring of the bearing 35 and is fixedly connected to the outer ring of the bearing 35. The support plate 38 is fixed on the gear seat 4. The push rod 24 passes through the support plate 38 and the cutter head 2. A baffle 25 is provided at the lower part of the push rod 24. The baffle 25 pushes the swing rod 12 to swing. Example 4

[0033] The swing rod 12 has a hole, and a shaft is installed in the hole. The shaft is fixedly installed in the second groove 7. The swing rod 12 rotates around the shaft. The upper end of the swing rod 12 is connected to a roller 13 through a pin. The roller 13 is vertically installed.

[0034] Unlike the above embodiments, in this embodiment, a hole is provided at the middle position of the swing rod 12, and the hole is connected to the second groove 7 through a shaft, and the swing rod 12 swings around the shaft. Example 5

[0035] The movable plate 11 is vertically arranged and in contact with the roller 13. The lower end of the movable plate 11 is connected to a slider 8 with a width greater than that of the first groove 6. There are two sliders 8. The lower end of the slider 8 is connected to a trigger rod 18 through a rod that passes through the first groove 6. The trigger rod 18 is horizontally arranged.

[0036] Unlike the above embodiments, in this embodiment, the swing of the swing rod 12 drives the roller 13 to move. The movement of the roller 13 can push the moving plate 11 to move horizontally on the cutter head 2. Under the action of the slider 8 and the first groove 6, the trigger rod 18 is driven to move horizontally. Example 6

[0037] A first spring 9 is connected to one side of the slider 8, and a first fixing plate 10 is fixedly connected to the tail end of the first spring 9. The first fixing plate 10 is disposed on the upper end surface of the cutter head 2.

[0038] Unlike the above embodiments, in this embodiment, the slider 8 and the moving plate 11 are fixedly connected, and the first groove 6 is the track for the moving plate 11 when it moves. Example 7

[0039] A gap is left between the lower end face of the gear holder 4 and the upper end face of the cutter head 2. A second fixing plate 14 is provided on both sides of the gear holder 4. A hole is provided in the second fixing plate 14, and a guide rod 15 is provided in the hole. The lower end of the guide rod 15 is fixedly connected to the cutter head 2. A second spring 16 is sleeved on the guide rod 15. A cap 17 is provided at the upper end of the guide rod 15. The second spring 16 is located between the cap 17 and the second fixing plate 14.

[0040] Unlike the above embodiments, in this embodiment, the gear seat 4 and the cutter head 2 are not fixedly connected, but have a gap in the middle to allow for positional changes during impact. In order to ensure the impact stability of the gear seat 4, a second fixing plate 14 is provided on both sides of the gear seat 4. The second fixing plate 14 is fitted with a guide rod 15 and moves along the guide rod 15. Example 8

[0041] The sensor 19 is fixedly installed on the lower end face of the cutter head 2, and the sensor 19 is positioned in the direction of the horizontal movement of the trigger rod 18. After the trigger rod 18 touches the sensor 19, a trigger signal is transmitted. The sensor 19 is provided with a connecting line 20, and is connected to the power supply box 21 through the connecting line 20.

[0042] Unlike the above embodiments, in this embodiment, the sensor 19 triggers a signal to the power supply box 21 when it is struck by the trigger rod 18. The power supply box 21 contains electrical components such as a controller and a motor 26, and the power supply box 21 has a waterproof rating. Example 9

[0043] A connecting shaft 33 is fixedly mounted on the center surface of the second gear 271. The connecting shaft 33 passes through the power supply box 21 and is connected to the cam 32. The connecting shaft 33 and the cam 32 are fixedly connected. The cam 32 is connected to the piston 29 rod through a pin. The end of the piston 29 rod is hinged to the connecting plate 30. The connecting plate 30 is located at the end of the piston 29.

[0044] Unlike the above embodiments, in this embodiment, the connecting shaft 33 is horizontally arranged and fixedly connected to the second gear 271. The other end of the connecting shaft 33 is fixedly connected to a cam 32. The cam 32 is hinged to the piston 29 rod, and the piston 29 rod is hinged to the connecting plate 30. The connecting plate 30 and the piston 29 are fixedly connected. Through the rotation of the cam 32, the piston 29 impacts the bottom of the gear seat 4. Example 10

[0045] A piston cylinder 28 is provided on the outside of the piston 29. The piston cylinder 28 is vertically arranged. The upper end of the piston cylinder 28 is connected to the lower end face of the cutter head 2. The piston cylinder 28 passes through the cutter head 2 and terminates at the upper end face of the cutter head 2.

[0046] Unlike the above embodiments, in this embodiment, the piston 29 and the cylinder 28 serve as the moving track for the piston 29. During the impact process, the piston 29 will impact the gear seat 4 at intervals along the internal channel of the piston 29 and the cylinder 28.

[0047] The working method (or working principle) of this invention: When this technology is in operation, when the roller 5 encounters a hard stone or rock, the roller 5 presses down on the roller shaft 36 under pressure. After the roller shaft 36 moves downward, it will drive the bearing 35 to move downward. A push rod 24 is fixedly installed on the bearing 35. At this time, the push rod 24 moves downward.

[0048] After the push rod 24 moves downward, since the baffle 25 and the push rod 24 are fixedly connected, the baffle 25 will push the swing rod 12 to swing. Since the third groove 23 is provided on the swing rod 12, the push rod 24 will not get stuck. When the swing rod 12 swings downward, the upper part of the swing rod 12 will swing upward around the second groove 7. The roller 13 is provided at the upper end of the swing rod 12. Therefore, the roller 13 will also drive and drive the moving plate 11 to move towards the position of the gear seat 4. Since the trigger rod 18 is provided on the moving plate 11, the trigger rod 18 will touch the sensor 19. When the sensor 19 is triggered, it will transmit the signal to the power supply box 21 through the connecting line 20. After the motor 26 is activated, it will drive the small gear to rotate, and then drive the large gear to rotate. The rotation of the large gear drives the rotation of the connecting shaft 33. Since the end of the connecting shaft 33 is equipped with a cam 32, which is hinged to a piston 29 rod, the piston 29 rod is driven to move, achieving the reciprocating motion of the piston 29. This reciprocating motion of the piston 29 enables the impact action of the gear 5. In summary, when encountering a hard rock, the gear 5 first performs a buffering action, providing immediate protection. Then, through the linkage and triggering device, the corrective device is activated. The corrective device not only corrects the position of the gear 5 but also achieves impact drilling of the rock at that location.

[0049] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A self-correcting intelligent reverse drilling rig, comprising a drill pipe (1) and a cutterhead (2), wherein a roller cone seat (4) is provided on the cutterhead (2), and a roller cone (5) is mounted on the roller cone seat (4), characterized in that: Also includes A buffer device, comprising a fourth groove (39) disposed on a toothed wheel seat (4), a toothed wheel shaft (36) disposed in the fourth groove (39), a bearing (35) disposed on the toothed wheel shaft (36), a push rod (24) connected to the bearing (35), a fourth spring (37) sleeved on the push rod (24), and a support plate (38) connected to the push rod (24) and passing through the support plate (38); A linkage device, the linkage device including a swing rod (12) connected to a push rod (24), the swing rod (12) having a third groove (23) provided on it, the swing rod (12) being connected to a cutter head (2) via a shaft, the cutter head (2) having a second groove (7) provided on it, the swing rod (12) passing through the second groove (7), and a roller (13) provided on the swing rod (12); The triggering device includes a movable plate (11) that is in contact with the roller (13). The lower end of the movable plate (11) is connected to a first groove (6). The lower end of the movable plate (11) is also provided with a trigger rod (18). A sensor (19) is provided on one side of the trigger rod (18). The sensor (19) is located on the lower end face of the cutter head (2). The correction device includes a power supply box (21) disposed on the lower end face of the cutter head (2), a motor (26) disposed in the power supply box (21), the motor (26) being connected to a first gear (270), the first gear (270) being connected to a second gear (271), a connecting shaft (33) being disposed on the second gear (271), a cam (32) being disposed on the connecting shaft (33), a piston (29) rod being connected to the cam (32), the piston (29) rod being connected to a piston (29), and the piston (29) contacting the bottom of the connecting gear seat (4).

2. The self-correcting intelligent reverse drilling rig according to claim 1, characterized in that: The gear seat (4) is U-shaped, and the fourth groove (39) is located on both sides and passes through both sides of the gear seat (4). The outer side of the gear seat (4) is provided with a guide rail (34), and the guide rail (34) is connected to a bearing (35). The bearing (35) can move in the guide rail (34). The inner ring of the bearing (35) is fixedly connected to the gear shaft (36). The gear shaft (36) and the gear (5) are fixedly connected.

3. The self-correcting intelligent reverse drilling rig according to claim 2, characterized in that: The upper end of the push rod (24) is fixedly connected to the outer ring of the bearing (33). The support plate (38) and the toothed wheel seat (4) are fixedly connected. The push rod (24) extends downward after passing through the support plate (38) and passes through the cutter head (2). The fourth spring (37) is located between the support plate (38) and the bearing (35). A baffle (25) is provided at the lower part of the push rod (24). The diameter of the baffle (25) is larger than that of the third groove (23). The lower end of the push rod (24) passes through the third groove (23).

4. The self-correcting intelligent reverse drilling rig according to claim 3, characterized in that: The swing rod (12) has a hole and a shaft is installed inside the hole. The shaft is fixedly installed in the second groove (7). The swing rod (12) rotates around the shaft. The upper end of the swing rod (12) is connected to a roller (13) through a pin. The roller (13) is vertically installed.

5. The self-correcting intelligent reverse drilling rig according to claim 4, characterized in that: The movable plate (11) is vertically arranged and in contact with the roller (13). The lower end of the movable plate (11) is connected to a slider (8) with a width greater than that of the first groove (6). There are two sliders (8). The lower end of the slider (8) is connected to a trigger rod (18) through a rod that passes through the first groove (6). The trigger rod (18) is horizontally arranged.

6. The self-correcting intelligent reverse drilling rig according to claim 5, characterized in that: A first spring (9) is connected to one side of the slider (8), and a first fixing plate (10) is fixedly connected to the tail end of the first spring (9). The first fixing plate (10) is disposed on the upper end surface of the cutter head (2).

7. The self-correcting intelligent reverse drilling rig according to claim 6, characterized in that: A gap is left between the lower end face of the gear seat (4) and the upper end face of the cutter head (2). A second fixing plate (14) is provided on both sides of the gear seat (4). A hole is provided in the second fixing plate (14), and a guide rod (15) is provided in the hole. The lower end of the guide rod (15) is fixedly connected to the cutter head (2). A second spring (16) is sleeved on the guide rod (15). A cap (17) is provided at the upper end of the guide rod (15). The second spring (16) is located between the cap (17) and the second fixing plate (14).

8. The self-correcting intelligent reverse drilling rig according to claim 7, characterized in that: The sensor (19) is fixedly installed on the lower end face of the cutter head (2), and the sensor (19) is located in the direction of horizontal movement of the trigger rod (18). After the trigger rod (18) touches the sensor (19), the trigger signal is transmitted. The sensor (19) is provided with a connecting line (20), and is connected to the power supply box (21) through the connecting line (20).

9. A self-correcting intelligent reverse drilling rig according to claim 8, characterized in that: A connecting shaft (33) is fixedly installed on the center surface of the second gear (271). The connecting shaft (33) passes through the power supply box (21) and is connected to the cam (32). The connecting shaft (33) and the cam (32) are fixedly connected. The cam (32) is connected to the piston (29) rod through a pin. The end of the piston (29) rod is hinged to the connecting plate (30). The connecting plate (30) is located at the end of the piston (29).

10. A self-correcting intelligent reverse drilling rig according to claim 9, characterized in that: A piston cylinder (28) is provided on the outside of the piston (29). The piston cylinder (28) is vertically arranged. The upper end of the piston cylinder (28) is connected to the lower end face of the cutter head (2). The piston cylinder (28) passes through the cutter head (2) and terminates at the upper end face of the cutter head (2).

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