MJS fractured drill bit extraction device and method

Abstract

The application discloses a kind of MJS broken drill bit extraction device and extraction method, wherein MJS broken drill bit extraction device is used to extract MJS drill bit broken in reinforcement body, including high-pressure rotary jet drill and alloy casing pipe connected with the high-pressure rotary jet drill, propelling tube is installed on the high-pressure rotary jet drill, the front end of the propelling tube is provided with electromagnet and ultrasonic sensor, the electromagnet and the ultrasonic sensor are respectively connected with direct current power supply and control component by wire and signal line arranged in the propelling tube.The application can effectively extract MJS broken drill bit from reinforcement body and underground structure by the form of electromagnet combined with sensor, simple and effective operation, and the influence of MJS drill bit fracture on subsequent construction is reduced to the greatest extent.

Description

Technical Field

[0001] This invention relates to the field of foundation and civil engineering technology, and more specifically, to a device and method for removing MJS fractured drill bits. Background Technology

[0002] Among existing foundation reinforcement methods, the MJS process is widely used due to its excellent foundation reinforcement effect, wide applicability, and minimal environmental impact.

[0003] During the pilot hole drilling in the MJS process, slight deviations between the drill bit and the predetermined direction, obstruction by hard obstacles during drilling, or material fatigue at the drill bit causing a decrease in strength may lead to a sudden increase in torque and uneven stress at the drill bit, resulting in breakage. A broken drill bit left in the hole will affect the subsequent construction progress, increase the construction difficulty, delay the construction period, and have adverse consequences for the construction project.

[0004] In existing technologies, such as patent authorization number CN216130896U, a drill bit recovery device based on a horizontal sleeve for a broken drill bit in an MJS drilling rig is disclosed. This device utilizes the variable cross-section of a wedge-shaped thread to simultaneously wedge the broken drill bit with the wedge-shaped thread and the alloy steel casing. The alloy steel casing and the wedge-shaped thread are then slowly and uniformly extracted using the action of a high-pressure jet grouting drilling rig. However, this solution cannot accurately locate the broken drill bit, and the fixation between the broken drill bit and the alloy steel casing is unreliable.

[0005] Therefore, it is clearly necessary to develop a new MJS fracture drill bit removal device and removal method. Summary of the Invention

[0006] The purpose of this invention is to provide a device and method for removing MJS broken drill bits, which can remove MJS broken drill bits from boreholes and reduce the adverse effects on the construction process.

[0007] To achieve the above-mentioned objectives, the technical solution adopted by the present invention is: an MJS fracture drill bit removal device, used to remove an MJS drill bit fractured within a reinforced body, comprising a high-pressure jet grouting drill and an alloy casing connected to the high-pressure jet grouting drill. A propulsion pipe is installed on the high-pressure jet grouting drill, and an electromagnet and an ultrasonic sensor are provided at the front end of the propulsion pipe. The electromagnet and the ultrasonic sensor are respectively connected to a DC power supply and a control component through wires and signal lines provided in the propulsion pipe.

[0008] In a further technical solution, the propulsion tube includes a multi-cavity tube, which includes a high-pressure gas cavity, a signal line cavity, and a wire cavity, with the wire and the signal line respectively placed in the wire cavity and the signal line cavity.

[0009] A further technical solution also includes a sealing block for the alloy sleeve to pass through, the sealing block being located on the side of the structural wall near the high-pressure jet grouting drill, the propulsion pipe being disposed inside the alloy sleeve, and a rubber gasket being disposed between the sealing block and the alloy sleeve.

[0010] In a further technical solution, a protective shell is provided on the outside of the electromagnet, and multiple bolt holes are provided on the protective shell. The propulsion tube is connected to the protective shell by bolts.

[0011] In a further technical solution, the electromagnet includes a magnetic core and an armature disposed in the protective shell. The magnetic core is clamped onto the propulsion tube. The magnetic core includes a mounting hole located in the middle, and the diameter of the mounting hole is the same as the outer diameter of the propulsion tube.

[0012] In a further technical solution, the outer diameter of the protective shell is smaller than the inner diameter of the alloy sleeve, and the alloy sleeve comprises multiple sections, which are connected by threads.

[0013] In a further technical solution, the alloy sleeve is provided with a through groove, which is located at the front end of the alloy sleeve.

[0014] In a further technical solution, an air compressor is connected to the outside of the propulsion pipe, and the air compressor is connected to the high-pressure gas cavity.

[0015] In a further technical solution, the control component includes a controller and a display, the ultrasonic sensor is electrically connected to the controller via the signal line, and the controller is electrically connected to the display.

[0016] Meanwhile, this invention provides a method for removing a broken MJS drill bit, comprising the following steps:

[0017] (1) The alloy casing and the feed pipe are pushed to the location of the broken drill bit by a high-pressure jet grouting drill and an external air compressor;

[0018] (2) Turn on the DC power supply to energize the electromagnet, and at the same time use the air compressor to deliver high-pressure air through the propulsion tube to clean the solidified body near the broken drill bit, so that the electromagnet attracts the broken drill bit.

[0019] (3) Control the high-pressure jet grouting drill to retract the feed pipe, thereby causing the broken drill bit to detach from the reinforced body;

[0020] (4) Push the alloy casing forward so that the broken drill bit falls into the alloy casing, then retract the alloy casing to complete the removal of the broken drill bit.

[0021] Due to the application of the above-mentioned technical solution, the present invention has the following advantages compared with the prior art:

[0022] 1. The MJS fractured drill bit removal device and method of the present invention can emit and collect ultrasonic signals through an ultrasonic sensor, thereby determining the travel of the propulsion tube and the specific location of the fractured drill bit in cooperation with the control components.

[0023] 2. After determining the location of the broken drill bit, the present invention can attract the broken drill bit to the electromagnet by the attraction of the electromagnet, and then pull the broken drill bit out of the solidified body and let it fall into the alloy sleeve by slowly and uniformly retracting the feed tube. Finally, the broken drill bit is removed by retracting the alloy sleeve.

[0024] 3. This invention, through the use of electromagnets combined with sensors, can effectively remove broken MJS drill bits from reinforced bodies and underground structures. The operation is simple and effective, minimizing the impact of MJS drill bit breakage on subsequent construction. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the MJS fractured drill bit removal device in Embodiment 1 of the present invention;

[0026] Figure 2 This is a schematic cross-sectional view of the electromagnet in Embodiment 1 of the present invention;

[0027] Figure 3 This is a schematic diagram of the external structure of the electromagnet in Embodiment 1 of the present invention;

[0028] Figure 4 This is a schematic diagram of the alloy sleeve in Embodiment 1 of the present invention;

[0029] Figure 5 This is a schematic diagram showing the cooperation between the MJS fractured drill bit removal device and the fractured drill bit in Embodiment 1 of the present invention;

[0030] Figure 6 This is a cross-sectional view of the propulsion tube in Embodiment 1 of the present invention.

[0031] The components include: 1. High-pressure jet grouting drill; 2. Propulsion tube; 3. Electromagnet; 4. Ultrasonic sensor; 5. Magnetic core; 6. Wire; 7. Protective shell; 8. Armature; 9. Alloy sleeve; 10. Thread; 11. Through groove; 12. Display; 13. Controller; 14. DC power supply; 15. Sealing block; 16. Structural wall; 17. Diaphragm wall; 18. Fractured drill bit; 19. Reinforced body; 20. High-pressure gas cavity; 21. Signal line cavity; 22. Wire cavity; 23. Air compressor. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments: Example 1

[0033] See Figure 1 and combined Figures 2-6 The MJS fractured drill bit removal device of the present invention is mainly used for removing the fractured drill bit 18. By setting an electromagnet 3 and combining it with an ultrasonic sensor 4, the MJS drill bit that is fractured in the solidified body 19 is removed by attraction.

[0034] The MJS fracture drill bit extraction device of the present invention includes a high-pressure jet grouting drill 1 and an alloy casing 9 connected to the high-pressure jet grouting drill 1. A propulsion pipe 2 is installed on the high-pressure jet grouting drill 1 and is disposed inside the alloy casing 9. An electromagnet 3 and an ultrasonic sensor 4 are disposed at the front end of the propulsion pipe 2. The electromagnet 3 and the ultrasonic sensor 4 are respectively connected to a DC power supply 14 and a control component through a wire 6 and a signal line disposed inside the propulsion pipe 2.

[0035] By setting an electromagnet 3 and an ultrasonic sensor 4 at the front end of the propulsion tube 2, the travel status of the propulsion tube 2 and the specific position information of the broken drill bit 18 can be determined under the action of the ultrasonic sensor 4. The operation of the electromagnet 3 can be controlled according to the received signal to attract the broken drill bit 18.

[0036] The alloy casing 9 mainly protects the feed tube 2 and can extend into the solidified body 19. When the electromagnet 3 attracts the broken drill bit 18, the alloy casing 9 is pushed forward by the high-pressure jet grouting drill 1. The alloy casing 9 is placed on the outside of the feed tube 2 and the broken drill bit 18 to reduce the friction of the soil on the broken drill bit 18, prevent the electromagnet 3 from separating from the broken drill bit 18, reduce soil erosion, and facilitate the removal of the broken drill bit 18.

[0037] An air compressor 23 is connected to the outside of the propulsion pipe 2. The air compressor 23 is connected to the propulsion pipe 2 and is used to control the forward thrust of the propulsion pipe 2 after it passes the underground connecting wall, as well as to blow and clean the soil near the broken drill bit 18.

[0038] The propulsion tube 2 includes a multi-cavity tube, which includes a high-pressure gas cavity 20, a signal line cavity 21, and a wire cavity 22. The wire 6 and the signal line are respectively placed in the wire cavity 22 and the signal line cavity 21.

[0039] The propulsion tube 2 is designed with multiple cavities, which facilitates the placement of the wires 6 and signal lines within the propulsion tube 2, and allows the propulsion tube 2 to be pushed forward under the action of the air compressor 23.

[0040] This technical solution also includes a sealing block 15 for the alloy sleeve 9 to pass through. The sealing block 15 is located on the side of the structural wall 16 near the high-pressure jet grouting drill 1. The propulsion pipe 2 is disposed inside the alloy sleeve 9. A rubber gasket is provided between the sealing block 15 and the alloy sleeve 9.

[0041] By setting the sealing block 15 and the rubber gasket, the sealing between the alloy sleeve 9 and the sealing block 15 can be guaranteed, and the high-pressure air output by the air compressor 23 can push the propulsion tube 2 with the electromagnet 3 and the ultrasonic sensor 4 forward, which is conducive to the electromagnet 3 reaching the solidified body 19 at the drill bit fracture position.

[0042] A protective shell 7 is provided on the outside of the electromagnet 3. The protective shell 7 is made of wear-resistant alloy material. The protective shell 7 isolates the electromagnet 3 from the external soil, protects the internal electromagnet 3 from wear, and ensures the normal operation of the electromagnet 3. Multiple bolt holes are provided on the outside of the protective shell 7. The push tube 2 is connected to the protective shell 7 by fixing bolts, which facilitates the installation and disassembly of the electromagnet 3.

[0043] The electromagnet 3 includes a magnetic core 5 and an armature 8 disposed in the protective shell 7. The magnetic core 5 is clamped on the propulsion tube 2. The magnetic core 5 includes a mounting hole located in the middle for mounting the propulsion tube 2. The diameter of the mounting hole on the magnetic core 5 is the same as the outer diameter of the propulsion tube 2.

[0044] Specifically, the inside of the electromagnet 3 is wound with multiple sets of wires 6. The wires 6 are separated from the outside of the electromagnet 3 by an armature 8. The armature 8 is welded to the magnetic core 5 and can be magnetized after the wires 6 are energized. This ensures that the wires 6 can normally magnetize the magnetic core 5 after being energized, and the magnetic force of the electromagnet 3 is not affected by soil particles and water.

[0045] The inner diameter of the alloy sleeve 9 is larger than the outer diameter of the protective shell 7. The alloy sleeve 9 consists of multiple segments, and adjacent segments of the alloy sleeve 9 are connected by threads 10. The connected alloy sleeve 9 can extend into the solidified body 19.

[0046] By coordinating the multiple alloy sleeves 9, the travel depth of the alloy sleeves 9 can be controlled according to the actual situation and the connection strength between the alloy sleeves 9 can be guaranteed. The alloy sleeves 9 are made of wear-resistant alloy, which can protect the internal propulsion tube 2 and the broken drill bit 18, making it easy to remove the broken drill bit 18 and prevent soil erosion.

[0047] A through groove 11 is provided on the alloy casing 9. The through groove 11 is located at the front end of the alloy casing 9, which enables the electromagnet 3 to carry the attracted broken drill bit 18 back to the through groove 11 at the front end of the alloy casing 9. By controlling the high-pressure jet grouting drill 1, the alloy casing 9 together with the broken drill bit 18 contained in the through groove 11 is slowly and uniformly moved out of the underground continuous wall 17.

[0048] The control components in this invention specifically include a controller 13 and a display 12. The ultrasonic sensor 4 is electrically connected to the controller 13 via a signal line, and the controller 13 is electrically connected to the display 12.

[0049] The cooperation of ultrasonic sensor 4, controller 13 and display 12 can confirm the direction of travel of propulsion tube 2 and the position of fracture drill bit 18, making the operation more accurate and convenient. Through the cooperation of DC power supply 14 and electromagnet 3, the specific timing of electromagnet 3 generating magnetic force can be controlled to prevent electromagnet 3 from attracting impurities in the soil and affecting the attraction of fracture drill bit 18.

[0050] The MJS fractured drill bit removal device of the present invention, through the action of ultrasonic sensor 4, can emit and collect ultrasonic signals as the propulsion tube 2 approaches the fractured drill bit 18. The ultrasonic signals are transmitted to the controller 13 in real time via signal line for analysis. The analysis results are reflected on the display 12 connected to the controller 13, which facilitates the determination of the propulsion tube 2's movement and the specific location information of the fractured drill bit 18.

[0051] This embodiment also provides a method for removing a broken MJS drill bit, including the following steps:

[0052] First, the alloy casing 9 is drilled and the propulsion tube 2 is advanced. The high-pressure jet grouting drill 1 and the alloy casing 9 are fixedly connected by the clamping device of the high-pressure jet grouting drill 1. Then, the high-pressure jet grouting drill 1 slowly propels the alloy casing 9 through the sealing block 15 and into the structural wall 16 and the underground continuous wall 17. Next, the connection between the high-pressure jet grouting drill 1 and the alloy casing 9 is disconnected, so that the high-pressure jet grouting drill 1 is fixedly connected to the propulsion tube 2, which is equipped with an ultrasonic sensor 4 and an electromagnet 3. The screw air compressor 23 is turned on, and the propulsion tube 2 is pushed forward under the action of high-pressure air. At the same time, the ultrasonic sensor 4, the controller 13 and the display 12 are turned on. The direction of advancement of the propulsion tube 2 and the relative position of the broken drill bit 18 are determined by the ultrasonic signal received by the ultrasonic sensor 4.

[0053] After confirming that the front end of the propulsion tube 2 has reached the vicinity of the fractured drill bit 18, the DC power supply 14 is turned on to energize the electromagnet 3. At the same time, the screw air compressor 23 is used to deliver high-pressure air through the propulsion tube 2 to clean the solidified body 19 near the fractured drill bit 18. After the electromagnet 3 attracts the fractured drill bit 18, the screw air compressor 23 is turned off.

[0054] The high-pressure jet grouting drill 1 is controlled to move the propulsion pipe 2 back slowly and at a constant speed, causing the broken drill bit 18 to detach from the reinforced body 19. Then, the connection between the high-pressure jet grouting drill 1 and the propulsion pipe 2 is disconnected, and the high-pressure jet grouting drill 1 controls the alloy casing 9 to advance forward along the direction of the propulsion pipe 2 toward the broken drill bit 18. The advancing distance is until the broken drill bit 18 is passed through. Then, the screw air compressor 23 is turned on to clear the soil inside the alloy casing 9, so that the broken drill bit 18 falls into the through groove 11 inside the alloy casing 9. Finally, the high-pressure jet grouting drill 1 controls the alloy casing 9 to retract slowly and at a constant speed, and the alloy casing 9 together with the broken drill bit 18 that fell inside it is removed from the underground continuous wall 17, completing the removal of the broken drill bit 18.

[0055] The method for removing the MJS fracture drill bit 18 in this invention, through the cooperation of ultrasonic sensor 4, controller 13 and display 12, can confirm the travel direction of the propulsion tube 2 and the position of the fracture drill bit 18, making the operation more precise and convenient. Through the cooperation of DC power supply 14 and electromagnet 3, the specific timing of the electromagnet 3 generating magnetic force can be controlled to prevent the electromagnet 3 from attracting impurities in the soil and affecting the attraction effect on the fracture drill bit 18. Through the cooperation of sealing block 15 and alloy sleeve 9, the sealing effect of the device is improved, which can effectively prevent soil erosion and the negative impact on the operation.

[0056] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0057] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A device for removing broken MJS drill bits, used to remove MJS drill bits broken within a reinforced body, characterized in that: The system includes a high-pressure jet grouting drill (1) and an alloy casing (9) connected to the high-pressure jet grouting drill (1). The high-pressure jet grouting drill (1) is equipped with a propulsion pipe (2). An electromagnet (3) and an ultrasonic sensor (4) are provided at the front end of the propulsion pipe (2). The electromagnet (3) and the ultrasonic sensor (4) are respectively connected to a DC power supply (14) and a control component through a wire (6) and a signal line provided in the propulsion pipe (2). The propulsion tube (2) includes a multi-cavity tube, which includes a high-pressure gas cavity (20), a signal line cavity (21), and a wire cavity (22). The wire (6) and the signal line are respectively placed in the wire cavity (22) and the signal line cavity (21). The electromagnet (3) is provided with a protective shell (7) on its outer side. The protective shell (7) is provided with multiple bolt holes. The push tube (2) is connected to the protective shell (7) by bolts. The electromagnet (3) includes a magnetic core (5) and an armature (8) disposed in the protective shell (7). The magnetic core (5) is clamped on the propulsion tube (2). The magnetic core (5) includes a mounting hole located in the middle. The diameter of the mounting hole is the same as the outer diameter of the propulsion tube (2). The alloy sleeve (9) is provided with a through groove (11), which is located at the front end of the alloy sleeve (9). An air compressor (23) is connected to the outside of the propulsion pipe (2), and the air compressor (23) is connected to the high-pressure gas chamber (20).

2. The MJS fractured drill bit extraction device according to claim 1, characterized in that: It also includes a sealing block (15) for the alloy sleeve (9) to pass through, the sealing block (15) being located on the side of the structural wall near the high-pressure jet grouting drill (1), the propulsion pipe (2) being disposed inside the alloy sleeve (9), and a rubber gasket being disposed between the sealing block (15) and the alloy sleeve (9).

3. The MJS fractured drill bit extraction device according to claim 1, characterized in that: The outer diameter of the protective shell (7) is smaller than the inner diameter of the alloy sleeve (9). The alloy sleeve (9) consists of multiple sections, which are connected by threads (10).

4. The MJS fractured drill bit extraction device according to claim 1, characterized in that: The control component includes a controller (13) and a display (12). The ultrasonic sensor (4) is electrically connected to the controller (13) via a signal line, and the controller (13) is electrically connected to the display (12).

5. A method for removing a broken MJS drill bit using the MJS broken drill bit removal device according to any one of claims 1 to 4, characterized in that, Includes the following steps: (1) The alloy casing and the feed pipe are pushed to the location of the broken drill bit by a high-pressure jet grouting drill and an external air compressor; (2) Turn on the DC power supply to energize the electromagnet, and at the same time use the air compressor to deliver high-pressure air through the propulsion tube to clean the solidified body near the broken drill bit, so that the electromagnet attracts the broken drill bit. (3) Control the high-pressure jet grouting drill to retract the feed pipe, thereby causing the broken drill bit to detach from the reinforced body; (4) Push the alloy casing forward so that the broken drill bit falls into the alloy casing, then retract the alloy casing to complete the removal of the broken drill bit.

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