Multi-section reaming drill rod for extremely broken surrounding rock support

Abstract

The invention relates to the field of drill rods, in particular to a multi-section reaming drill rod for extremely broken surrounding rock support. According to the multi-section reaming drill rod for supporting the extremely broken surrounding rock, the reaming assembly can be unfolded to conduct reaming drilling on the surrounding rock, operation is easy, the reaming assembly can be taken back conveniently, follow-up grouting is facilitated, and use convenience is improved. A multi-section chambering drill rod for extremely broken surrounding rock support comprises a guide frame, a drilling mechanism and a chambering mechanism, the drilling mechanism used for drilling holes in the surrounding rock support is arranged on the guide frame, and the chambering mechanism used for chambering is arranged on the drilling mechanism. The drilling machine drives the connector, the drill rod, the spiral piece and the drill bit to rotate, so that the drill rod, the spiral piece and the drill bit are drilled into the surrounding rock wall, the reaming assembly is unfolded for drilling, after drilling is completed, the reaming assembly is retracted and taken out, and therefore the reaming assembly can be unfolded for expanding and drilling the surrounding rock, operation is easy, and the reaming assembly can be conveniently retracted; and subsequent grouting is facilitated, and the use convenience is improved.

Description

Technical Field

[0001] The invention relates to the field of drill rods, and in particular to a multi-section hole-enlarging drill rod for extremely broken surrounding rock support. Background Art

[0002] Extremely broken surrounding rock refers to geological bodies with very unstable rock structure, low strength, and easy to break or fall off. The support of extremely broken surrounding rock is a common problem in underground projects such as tunnel engineering and mining. This type of surrounding rock has a loose structure and poor stability, so special support technology is required to ensure construction safety and project quality. Multi-section reaming drill rod is a special drilling tool used in underground projects, often used for reaming operations, especially when extremely broken surrounding rock needs to be supported.

[0003] The existing multi-section reaming drill rod usually drills the drill rod into a specified area, then opens the umbrella-shaped reaming component on the drill rod, and then rotates to reame the hole. When the reaming component is retracted after the reaming is completed, mud is easily swept into the drill rod, making it difficult to retract the umbrella-shaped reaming component, thereby making it difficult to remove the drill rod from the borehole, which is inconvenient to use and affects the subsequent grouting.

[0004] Therefore, it is necessary to design a multi-section reaming drill rod for extremely broken surrounding rock support that can unfold the reaming assembly to expand the borehole in the surrounding rock, is simple to operate, is convenient for retracting the reaming assembly, is convenient for subsequent grouting, and improves the convenience of use. Summary of the invention

[0005] In order to overcome the disadvantage that soil is easily swept into the drill rod when the reaming component is retracted after the reaming is completed, which makes it difficult to retract the umbrella-shaped reaming component, thereby making it difficult to take the drill rod out of the borehole, which is inconvenient to use and affects the subsequent grouting. The present invention provides a multi-section reaming drill rod for extremely broken surrounding rock support that can unfold the reaming component to expand the borehole, is simple to operate, is convenient for retracting the reaming component, is convenient for subsequent grouting, and improves the convenience of use.

[0006] The technical implementation scheme of the present invention is: a multi-section reaming drill rod for extremely broken surrounding rock support, including a guide frame, a drilling mechanism and an reaming mechanism, the guide frame is provided with a drilling mechanism for surrounding rock support drilling, and the drilling mechanism is provided with an reaming mechanism for reaming.

[0007] More preferably, a plurality of fixing nails are provided on the upper side of the guide frame.

[0008] More preferably, the drilling mechanism includes a joint, a drill rod, a spiral piece and a drill bit. A drill rod is provided in the middle of the guide frame, a joint is connected to the lower side of the drill rod, the joint can be docked with the guide frame, a spiral piece is provided on the outer side of the drill rod, and a drill bit is connected to the upper part of the drill rod through a thread.

[0009] More preferably, the reaming mechanism includes a reaming assembly, a fixing frame, a bevel gear and a rotating rod, multiple reaming assemblies are provided on the left and right parts of the drill rod, multiple fixing frames are connected to the inner sides of the left and right parts of the drill rod, a rotating rod is rotatably connected to the middle part of the joint, and multiple bevel gears are connected to the rotating rod.

[0010] More preferably, the fixing frames are all U-shaped.

[0011] More preferably, the reaming assembly includes a first screw, a second screw, a third screw, a first shell, a second shell, a third shell and a fourth shell, the left and right parts of the drill rod are connected to a plurality of fourth shells, the middle part of the fourth shell is rotatably connected to the first screw, the first screw passes through the adjacent fourth shell and is rotatably connected to the fixed frame, the inside and outside of the first screw are also connected to bevel gears, the two adjacent bevel gears at the same height position are meshed with each other, the inner side of the fourth shell is slidably connected to the third shell, the third shell is connected to the adjacent first screw through a thread, and the inner side of the third shell is connected to the third shell. Two screws, the outer side of the second screw is connected to the second shell by a thread, the second shell is slidably connected to the adjacent third shell, the inner side of the second shell is connected to the third screw, the outer side of the third screw is connected to the first shell by a thread, and the first shell is slidably connected to the adjacent second shell; the first screw is rotated along the fixed frame, the third shell is moved under the action of the thread, and then the second screw is moved and rotated, the second shell is moved under the action of the thread, and then the third screw is moved and rotated, the first shell is moved under the action of the thread, and then the hole expansion assembly is expanded.

[0012] More preferably, a self-locking mechanism is also included, which includes a push rod and a chuck. The push rod is slidably connected to the inner side of the rotating rod, and multiple chucks are connected to the push rod. The chucks are all engaged with adjacent bevel gears, and the chucks are all slidably connected to the rotating rod. The push rod is pulled to move, thereby driving the chuck to move, so that the chuck is engaged with the bevel gear on the rotating rod, and then the bevel gear is limited and locked.

[0013] More preferably, a grouting mechanism is also included, which includes a baffle, a base plate, an external tube, a nozzle and a spring. The front and rear parts of the drill rod are connected to the base plate, and the base plate is slidably connected to the baffle, which is slidably connected to the joint, and the baffle is in contact with the guide frame. A plurality of nozzles are connected to the inner side of the base plate, and the inner sides of the nozzles on the same side are connected to the external tube, and a spring is connected between the baffle and the base plate; the baffle moves along the base plate, and the spring is stretched so that the discharge port on the baffle corresponds to the position of the nozzle, and then the slurry delivery pipeline is connected to the external tube, so that the slurry flows into the external tube and then into the nozzle to be sprayed from the discharge port for grouting.

[0014] More preferably, the baffle is provided with a plurality of discharge ports.

[0015] More preferably, the bottom plates are all C-shaped.

[0016] The beneficial effects of the present invention are as follows: 1. The present invention drives the joint, drill rod, spiral piece and drill bit to rotate through the drilling rig, so that the drill rod, spiral piece and drill bit drill into the surrounding rock wall, and the hole expansion component is expanded to drill a hole. After the drilling is completed, the hole expansion component is retracted and taken out, so that the hole expansion component can be expanded to expand the surrounding rock and drill a hole. The operation is simple, the hole expansion component is easy to retract, and the subsequent grouting is convenient, which improves the convenience of use.

[0017] 2. After the drill rod is drilled into the designated position and the reaming assembly is unfolded, the drilling rig is removed and then the push rod is pulled to move, thereby driving the chuck to move so that the chuck is engaged with the bevel gear on the rotating rod, thereby limiting and locking the bevel gear to prevent the reaction force of the surrounding rock from causing the reaming assembly to be retracted and affecting the reaming, thereby improving the stability of the reaming.

[0018] 3. The present invention continues to move the joint so that the baffle moves along the bottom plate, so that the outlet on the baffle corresponds to the position of the nozzle, and then the slurry flows into the nozzle and is sprayed out from the outlet for grouting. The drill rod is moved out while grouting, so that grouting can be carried out directly after the hole expansion is completed, saving grouting time, further improving the convenience of use, and preventing impurities from entering the nozzle during the drilling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0020] Figure 2 It is a three-dimensional structural cross-sectional view of the present invention.

[0021] Figure 3 It is a schematic diagram of the three-dimensional structure of the drilling mechanism of the present invention.

[0022] Figure 4 It is a schematic diagram of the three-dimensional structure of the hole expansion mechanism of the present invention.

[0023] Figure 5 It is a partial three-dimensional structural schematic diagram of the hole expansion mechanism of the present invention.

[0024] Figure 6 It is a sectional view of a first partial three-dimensional structure of the hole expansion mechanism of the present invention.

[0025] Figure 7 It is a sectional view of a second partial three-dimensional structure of the hole expansion mechanism of the present invention.

[0026] Figure 8 It is a three-dimensional structural cross-sectional view of the self-locking mechanism of the present invention.

[0027] Fig. 9It is a partial three-dimensional structural schematic diagram of the grouting mechanism of the present invention.

[0028] Fig.10 It is a three-dimensional structural sectional view of the grouting mechanism of the present invention.

[0029] The markings of the components in the accompanying drawings are as follows: 1. Guide frame, 2. Drilling mechanism, 21. Joint, 22. Drill rod, 23. Spiral sheet, 24. Drill bit, 3. Expanding mechanism, 31. Expanding assembly, 311. First screw, 312. Second screw, 313. Third screw, 314. First shell, 315. Second shell, 316. Third shell, 317. Fourth shell, 32. Fixed frame, 33. Bevel gear, 34. Rotating rod, 4. Self-locking mechanism, 41. Push rod, 42. Chuck, 5. Grouting mechanism, 51. Baffle, 52. Bottom plate, 53. External tube, 54. Sprinkler, 55. Spring. DETAILED DESCRIPTION

[0030] The following descriptions are merely preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention.

[0031] A multi-section expansion drill rod for extremely broken surrounding rock support, such as Figure 1-Figure 7 As shown, it includes a guide frame 1, a drilling mechanism 2 and an expanding mechanism 3. Four fixing nails are arranged on the upper side of the guide frame 1 for easy fixation. The guide frame 1 is provided with a drilling mechanism 2 for surrounding rock support drilling, and the drilling mechanism 2 is provided with an expanding mechanism 3 for expanding the hole.

[0032] like Figure 1-Figure 3 As shown, the drilling mechanism 2 includes a joint 21, a drill rod 22, a spiral piece 23 and a drill bit 24. The drill rod 22 is provided in the middle of the guide frame 1, and the joint 21 is connected to the lower side of the drill rod 22. The joint 21 can be connected to the guide frame 1. The outer side of the drill rod 22 is provided with a spiral piece 23, and the upper part of the drill rod 22 is connected to the drill bit 24 through a thread.

[0033] like Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, the reaming mechanism 3 includes a reaming assembly 31, a fixing frame 32, a bevel gear 33 and a rotating rod 34. The left and right parts of the drill rod 22 are each provided with three reaming assemblies 31. The reaming assembly 31 includes a first screw 311, a second screw 312, a third screw 313, a first shell 314, a second shell 315, a third shell 316 and a fourth shell 317. The left and right parts of the drill rod 22 are each connected to three fourth shells 317. The middle of the fourth shell 317 is rotatably connected to the first screw 311. The first screw 311 passes through the adjacent fourth shell 317 and is rotatably connected to the fixing frame 32. The inside and outside of the first screw 311 are also connected to the bevel gear 33. The two adjacent bevel gears 33 at the same height position are meshed with each other. The inside of the fourth shell 317 is connected to the bevel gear 33. The third shell 316 is slidably connected to the sides, and the third shell 316 is connected to the adjacent first screw 311 through a thread. The inner side of the third shell 316 is connected to the second screw 312, and the outer side of the second screw 312 is connected to the second shell 315 through a thread. The second shell 315 is slidably connected to the adjacent third shell 316, the inner side of the second shell 315 is connected to the third screw 313, and the outer side of the third screw 313 is connected to the first shell 314 through a thread. The first shell 314 is slidably connected to the adjacent second shell 315, and the inner sides of the left and right parts of the drill pipe 22 are connected to three fixing frames 32, and the fixing frames 32 are all U-shaped. The middle part of the joint 21 is rotatably connected to a rotating rod 34, and the rotating rod 34 is connected to three bevel gears 33.

[0034] When extremely broken surrounding rock support requires the use of a multi-section reaming drill rod 22, the present device can be used. The present device is brought to the location of extremely broken surrounding rock support, and then a drill rig is installed on the joint 21. Then, the drill bit 24 is brought into contact with the extremely broken surrounding rock. Then, the drill rig is started, and the joint 21, the drill rod 22, the spiral piece 23 and the drill bit 24 are driven by the drill rig to rotate, so that the drill rod 22, the spiral piece 23 and the drill bit 24 are drilled into the surrounding rock wall, and then the guide frame 1 is brought into contact with the surrounding rock wall, so that the fixing nails are inserted into the surrounding rock wall for fixing, and then the drill rig is removed, and then the rotating rod 3 is rotated. The external driving device is started to drive the rotating rod 34 to rotate, so that the bevel gear 33 on the rotating rod 34 rotates, and the two adjacent bevel gears 33 mesh with each other, thereby driving the first screw rod 311 to rotate along the fixing frame 32. The fixing frame 32 is U-shaped, and the third housing 316 moves under the action of the thread, thereby driving the second screw rod 312 to move and rotate, and the second housing 315 moves under the action of the thread, thereby driving the third screw rod 313 to move and rotate, and the first housing 314 moves under the action of the thread, thereby The reaming assembly 31 is unfolded, and then the drill rig is installed on the joint 21. Then, the drill rig is started to drive the joint 21, the drill rod 22, the spiral piece 23, the drill bit 24 and the reaming assembly 31 to rotate to expand the surrounding rock. After the drilling is completed, the drill rig is removed, and then the driving device is installed on the rotating rod 34. By starting the driving device in reverse operation, the rotating rod 34 rotates in the reverse direction, and then the bevel gear 33 rotates in the reverse direction. The two adjacent bevel gears 33 mesh with each other, so that the first screw 311 rotates in the reverse direction. Under the action of the thread The third shell 316 is moved in the opposite direction, thereby driving the second screw 312 to move in the opposite direction and rotate. Under the action of the thread, the second shell 315 is moved in the opposite direction, thereby driving the third screw 313 to move in the opposite direction and rotate. Under the action of the thread, the first shell 314 is moved in the opposite direction, thereby retracting the reaming assembly 31, and then the driving device is removed, and then the device is taken out, so that the reaming assembly 31 can be deployed to expand the drilling hole in the surrounding rock. The operation is simple, which facilitates the retraction of the reaming assembly 31 and the subsequent grouting, thereby improving the convenience of use.

[0035] like Figure 1 , Figure 2 and Figure 8 As shown, a self-locking mechanism 4 is also included, which includes a push rod 41 and a chuck 42. The push rod 41 is slidably connected to the inner side of the rotating rod 34, and three chucks 42 are connected to the push rod 41. The chucks 42 are all engaged with the adjacent bevel gears 33, and the chucks 42 are all slidably connected to the rotating rod 34.

[0036] After the drill rod 22 drills into the specified position and the reaming assembly 31 is deployed, the drilling rig is removed, and then the push rod 41 is pulled to move, thereby driving the chuck 42 to move, so that the chuck 42 is engaged with the bevel gear 33 on the rotating rod 34, so that the bevel gear 33 can be limited and locked to prevent the reaction force of the surrounding rock from causing the reaming assembly 31 to be retracted and affecting the reaming, thereby improving the stability of the reaming. When the reaming is completed, the push rod 41 is pushed in the reverse direction by hand, so that the chuck 42 moves in the reverse direction and disengages from the bevel gear 33 on the rotating rod 34.

[0037] like Figure 1 , Figure 2 , Fig. 9 and Fig.10 As shown, a grouting mechanism 5 is also included, and the grouting mechanism 5 includes a baffle 51, a bottom plate 52, an external pipe 53, a nozzle 54 and a spring 55. The front and rear parts of the drill rod 22 are connected to the bottom plate 52, and the bottom plates 52 are all C-shaped. The bottom plates 52 are slidably connected to the baffles 51, and the baffles 51 are slidably connected to the joints 21. The baffles 51 are in contact with the guide frame 1, and nine discharge ports are opened on the baffles 51 for grouting. Nine nozzles 54 are connected to the inner side of the bottom plate 52, and the inner sides of the nozzles 54 on the same side are connected to the external pipe 53, and a spring 55 is connected between the baffle 51 and the bottom plate 52.

[0038] When the guide frame 1 is inserted into the surrounding rock wall and the drill rod 22 continues to rotate and drill, the joint 21 will continue to move, causing the baffle 51 to move along the bottom plate 52. The bottom plates 52 are all C-shaped, and the spring 55 is stretched so that the discharge port on the baffle 51 corresponds to the position of the nozzle 54. Then, the slurry delivery pipeline is externally connected through the external tube 53, so that the slurry flows into the external tube 53 and then enters the nozzle 54 to be sprayed out from the discharge port for grouting. The drill rod 22 is removed while grouting, so that grouting can be carried out directly after the hole expansion is completed, saving grouting time, further improving the convenience of use, and preventing impurities from entering the nozzle 54 during the drilling process. After the drill rod 22 is removed, the spring 55 rebounds, and the baffle 51 moves to its original position.

[0039] Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation shall fall within the protection scope of the present invention.

Claims

1. A multi-section expansion drill rod for extremely broken surrounding rock support, characterized in that: The invention comprises a guide frame (1), a drilling mechanism (2) and a hole enlarging mechanism (3); the guide frame (1) is provided with a drilling mechanism (2) for surrounding rock support drilling, and the drilling mechanism (2) is provided with a hole enlarging mechanism (3) for enlarging the hole.

2. A multi-section reaming drill rod for extremely broken surrounding rock support according to claim 1, characterized in that: A plurality of fixing nails are arranged on the upper side of the guide frame (1).

3. A multi-section reaming drill rod for extremely broken surrounding rock support according to claim 2, characterized in that: The drilling mechanism (2) comprises a joint (21), a drill rod (22), a spiral piece (23) and a drill bit (24); a drill rod (22) is arranged in the middle of the guide frame (1); a joint (21) is connected to the lower side of the drill rod (22); the joint (21) can be butt-jointed with the guide frame (1); a spiral piece (23) is arranged on the outer side of the drill rod (22); and a drill bit (24) is connected to the upper part of the drill rod (22) via a thread.

4. A multi-section reaming drill rod for extremely broken surrounding rock support according to claim 3, characterized in that: The hole expansion mechanism (3) comprises a hole expansion assembly (31), a fixing frame (32), a bevel gear (33) and a rotating rod (34). The left and right parts of the drill rod (22) are both provided with a plurality of hole expansion assemblies (31). The inner sides of the left and right parts of the drill rod (22) are both connected with a plurality of fixing frames (32). The middle part of the joint (21) is rotatably connected with a rotating rod (34), and the rotating rod (34) is connected with a plurality of bevel gears (33).

5. A multi-section reaming drill rod for extremely broken surrounding rock support according to claim 4, characterized in that: The fixing frame (32) is U-shaped.

6. A multi-section reaming drill rod for extremely broken surrounding rock support according to claim 5, characterized in that: The hole expansion assembly (31) includes a first screw (311), a second screw (312), a third screw (313), The first housing (314), the second housing (315), the third housing (316) and the fourth housing (317), the left and right parts of the drill rod (22) are connected to a plurality of fourth housings (317), the middle part of the fourth housing (317) is rotatably connected to the first screw (311), the first screw (311) passes through the adjacent fourth housing (317) and is rotatably connected to the fixed frame (32), the inside and outside of the first screw (311) are also connected to bevel gears (33), the two adjacent bevel gears (33) at the same height position are meshed with each other, the inside of the fourth housing (317) is slidably connected to the third housing (316), the third housing (316) is connected to the adjacent first screw (311) through a thread, the inside of the third housing (316) is connected to the second screw (312), the second screw (31 2) The outer side is connected to the second shell (315) by threads, and the second shell (315) is slidably connected to the adjacent third shell (316). The inner side of the second shell (315) is connected to the third screw rod (313), and the outer side of the third screw rod (313) is connected to the first shell (314) by threads, and the first shell (314) is slidably connected to the adjacent second shell (315); the first screw rod (311) rotates along the fixing frame (32), and the third shell (316) moves under the action of the thread, thereby driving the second screw rod (312) to move and rotate, and the second shell (315) moves under the action of the thread, thereby driving the third screw rod (313) to move and rotate, and the first shell (314) moves under the action of the thread, thereby expanding the hole expansion assembly (31).

7. A multi-section reaming drill rod for extremely broken surrounding rock support according to claim 6, characterized in that: The invention also comprises a self-locking mechanism (4), which comprises a push rod (41) and a chuck (42). The push rod (41) is slidably connected to the inner side of the rotating rod (34), and a plurality of chucks (42) are connected to the push rod (41). The chucks (42) are all engaged with adjacent bevel gears (33), and the chucks (42) are all slidably connected to the rotating rod (34). By pulling the push rod (41) to move, the chucks (42) are driven to move, so that the chucks (42) are engaged with the bevel gears (33) on the rotating rod (34), and the bevel gears (33) are locked in a limited position.

8. A multi-section reaming drill rod for extremely broken surrounding rock support according to claim 7, characterized in that: The invention also comprises a grouting mechanism (5), the grouting mechanism (5) comprising a baffle (51), a bottom plate (52), an external pipe (53), a nozzle (54) and a spring (55), the front and rear parts of the drill rod (22) are connected to the bottom plate (52), the baffle (51) is slidably connected to the bottom plate (52), the baffle (51) is slidably connected to the joint (21), the baffle (51) is in contact with the guide frame (1), and the inner side of the bottom plate (52) is connected to a plurality of nozzles (54). ), the inner sides of the nozzles (54) on the same side are connected with external pipes (53), and a spring (55) is connected between the baffle (51) and the bottom plate (52); the baffle (51) moves along the bottom plate (52), and the spring (55) is stretched, so that the discharge port on the baffle (51) corresponds to the position of the nozzle (54), and then the external pipe (53) is connected to the slurry delivery pipeline, so that the slurry flows into the external pipe (53) and then enters the nozzle (54) and is sprayed out from the discharge port for grouting.

9. A multi-section reaming drill rod for extremely broken surrounding rock support according to claim 8, characterized in that: The baffle plate (51) is provided with a plurality of discharge ports.

10. A multi-section reaming drill rod for extremely broken surrounding rock support according to claim 9, characterized in that: The bottom plates (52) are all C-shaped.

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