A drilling device for slope grouting

Abstract

The present application relates to a kind of drilling devices for slope grouting, including hollow drill rod, with the hollow drill rod threaded connection connecting sleeve, be set in the connecting sleeve inside limiting disc, multiple blades are installed in the connecting sleeve far from the end of the hollow drill rod and respectively with the limiting disc sliding connection, control disc is installed in the connecting sleeve inside and is used to control the sliding of the blade, and multiple circulation pipes are set in the connecting sleeve inside and penetrate the control disc;Realize that the drilling diameter is vertically changed with the dynamic adjustment of slope rock-soil density, can be accurately adapted to aperture according to loose soil layer, hard rock layer and other different working conditions, give consideration to grouting pipe down into smoothness and hard rock drilling efficiency, solve the industry pain point that traditional fixed aperture device has poor adaptability.

Description

Technical Field

[0001] This invention relates to the field of rock and soil drilling technology, and specifically to a drilling device for slope grouting. Background Technology

[0002] In slope grouting construction, the drilling device is the core equipment for hole formation. Existing slope drilling devices mostly use fixed-diameter structures, which cannot adapt to the density differences in the vertical direction of the slope's soil and rock mass. Loose soil layers require larger diameter holes to ensure the insertion of the grouting pipe and the penetration of the grout, while hard rock layers require smaller diameter holes to reduce drilling resistance and drill bit wear. Fixed-diameter devices are prone to problems such as low hole formation efficiency and poor grouting adaptability. Furthermore, traditional drilling devices often have cutter blades connected to the drill body only through a single fixed structure, resulting in a weak power transmission path. When the cutter blades are adjusted or when the drilling reaction force is large, the connection is prone to loosening, deformation, or even detachment. During drilling, mud can easily enter the control component area, causing the diameter adjustment mechanism to jam or malfunction, further affecting the efficiency and safety of slope drilling construction. Summary of the Invention

[0003] In order to solve the above-mentioned problems in the existing technology, the present invention aims to provide a drilling device for slope grouting.

[0004] The technical solution adopted in this invention is as follows: A drilling device for slope grouting includes a hollow drill rod, a connecting sleeve threadedly connected to the hollow drill rod, a limiting plate disposed inside the connecting sleeve, a plurality of cutter wings installed on the end of the connecting sleeve away from the hollow drill rod and slidably connected to the limiting plate, a control plate installed inside the connecting sleeve for controlling the sliding of the cutter wings, and a plurality of circulation pipes disposed inside the connecting sleeve and penetrating the control plate. Adjust the position of the cutter blades and change the borehole diameter based on the vertical changes in soil and rock density during slope drilling.

[0005] As a preferred embodiment of the present invention, the connecting sleeve is provided with a fixing rod, and a connecting piece is fixedly provided at each end of the fixing rod. The connecting piece is fixedly connected to the inner wall of the connecting sleeve. The connecting sleeve is provided with a main shaft. The end of the main shaft near the hollow drill rod is provided with a fixing hole. The fixing rod cooperates with the fixing hole. The end of the main shaft away from the hollow drill rod is fixedly provided with a connecting plate. The connecting plate cooperates with the limiting plate.

[0006] As a preferred embodiment of the present invention, a mud-separating plate is provided on the side of the control disc away from the limiting disc. The mud-separating plate is fixedly connected to the inner wall of the connecting sleeve. The mud-separating plate is provided with a plurality of communicating holes that communicate with the circulation pipe. An installation groove is provided in the center of the mud-separating plate. A protective shell is fixedly provided on the installation groove. A round hole is provided on the side of the protective shell near the hollow drill rod. The spindle is sealed and fitted with the round hole.

[0007] As a preferred embodiment of the present invention, the limiting plate is provided with a plurality of control grooves on the side near the hollow drill rod, and a sliding rod is slidably disposed in the control grooves. The connecting sleeve is provided with a plurality of square holes at the end away from the hollow drill rod, and the sliding rod passes through the square holes. A fixing sleeve is fixedly disposed at the end of the sliding rod outside the connecting sleeve, and the fixing sleeve is used to install the cutter wing. A plurality of connecting blocks are fixedly disposed on the periphery of the connecting plate, and the connecting blocks cooperate with the control grooves.

[0008] As a preferred embodiment of the present invention, a sliding column is fixedly provided at one end of the sliding rod near the hollow drill rod, and a plurality of arc-shaped grooves are provided on the control disk. The distances from the two ends of each arc-shaped groove to the center of the control disk are not equal. The sliding column cooperates with the arc-shaped groove to control the rotation of the control disk relative to the limiting disk, so that the sliding column slides along the arc-shaped groove while the sliding rod slides along the control groove.

[0009] In a preferred embodiment of the present invention, the main shaft passes through the mud baffle and the control disk, a control sleeve is rotatably provided around the main shaft, a key block is fixedly provided at the end of the control sleeve away from the hollow drill rod, the control sleeve is connected to the control disk through the key block, the control sleeve passes through the mud baffle, a transmission gear is fixedly provided at the end of the control sleeve away from the key block, a control motor is fixedly provided on the inner wall of the protective shell, a drive gear is fixedly provided on the output shaft of the control motor, and the drive gear meshes with the transmission gear.

[0010] As a preferred embodiment of the present invention, the control panel is provided with a plurality of mounting holes, which are staggered with the arc-shaped grooves. The end of the mounting hole near the hollow drill rod forms a stepped structure. The circulation pipe passes through the mounting hole. A limiting ring is fixedly provided on the outer side of the end of the circulation pipe near the hollow drill rod. The limiting ring cooperates with the stepped structure of the mounting hole.

[0011] As a preferred embodiment of the present invention, a connecting groove is formed on the inner side of the circulation pipe near one end of the hollow drill rod, and a connecting pipe communicating with the connecting hole is fixedly provided on the side of the mud baffle away from the hollow drill rod, and the connecting pipe cooperates with the connecting groove.

[0012] As a preferred embodiment of the present invention, the limiting plate is provided with a plurality of sector-shaped grooves, the sector-shaped grooves and the control grooves are staggered, and the circulation pipe passes through the sector-shaped grooves, allowing the circulation pipe to move within the range corresponding to the sector-shaped grooves.

[0013] As a preferred embodiment of the present invention, the blade includes a body and a plurality of diamond particles disposed on the surface of the body. The body and the fixing sleeve are fixedly connected. A support groove is fixedly provided on one side of the body. A support plate is fixedly provided at the end of the connecting disc away from the main shaft. The support plate is slidably connected to the support groove.

[0014] The beneficial effects of this invention are as follows: As a drilling device for slope grouting, this invention achieves dynamic adjustment of the borehole diameter according to the vertical variation of the slope soil and rock density. It can accurately adapt the borehole diameter according to different working conditions such as loose soil layers and hard rock layers, taking into account both the smoothness of grouting pipe lowering and the drilling efficiency in hard rock, thus solving the industry pain point of poor adaptability of traditional fixed borehole diameter devices. The device optimizes the power transmission and component protection structure. Before and after the cutter blade slides, the power transmitted by the power head remains stable. The cutter blade obtains drilling power by relying on the support plate and support groove, eliminating the dependence on the weak connection of the fixed sleeve, effectively dispersing the drilling reaction force, and preventing the cutter blade from loosening and deforming. At the same time, the sealing protection structure and the adaptive swing design of the circulation pipe avoid mud jamming the control components, ensuring the sealing and continuity of the mud circulation path, and achieving stable slag discharge and cooling. The overall structure is compact, the transmission is precise, and the stability is strong. It is suitable for the complex construction environment of slope drilling, greatly improving the efficiency, quality, and service life of slope grouting hole formation operations, and laying a reliable foundation for subsequent slope grouting construction. Attached Figure Description

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific implementation methods.

[0016] Figure 1 This is an exploded structural diagram of the present invention; Figure 2 This is the present invention. Figure 1 A schematic diagram of the internal structure of the connecting sleeve; Figure 3 This is the present invention. Figure 1 A schematic diagram of the blade wing section; Figure 4 This is the present invention. Figure 1 A schematic diagram of the assembly structure; Figure 5 This is the present invention. Figure 4 A top-view structural diagram; Figure 6 This is the present invention. Figure 4 A schematic diagram of the longitudinal section structure. Detailed Implementation

[0017] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0018] Combination Figures 1-6 A drilling device for slope grouting includes a hollow drill rod 11, a connecting sleeve 12 threadedly connected to the hollow drill rod 11, a limiting disc 20 disposed inside the connecting sleeve 12, multiple cutter wings 21 installed at the end of the connecting sleeve 12 away from the hollow drill rod 11 and slidably connected to the limiting disc 20, a control disc 19 installed inside the connecting sleeve 12 for controlling the sliding of the cutter wings 21, and multiple circulation pipes 29 disposed inside the connecting sleeve 12 and penetrating the control disc 19. Compared with traditional fixed-diameter drilling devices, this device overcomes the problem of poor adaptability to a single diameter, allowing for dynamic diameter adjustment according to different soil and rock conditions such as loose soil layers and hard rock layers. It balances the smoothness of grouting pipe insertion with drilling efficiency in hard rock, while the circulation pipes 29 facilitate mud circulation during the drilling process. The power transmission is stable before and after the sliding diameter adjustment of the cutter wings 21, laying a foundation for adaptability in subsequent slope grouting construction. The overall structure is compact, and the core functions specifically address the industry pain points of complex slope drilling conditions.

[0019] Adjust the position of the cutter blade 21 according to the vertical change in soil and rock density during slope drilling to change the borehole diameter.

[0020] Advantageously, the connecting sleeve 12 is provided with a fixing rod 14, and a connecting piece 13 is fixedly fixed at each end of the fixing rod 14. The connecting piece 13 is fixedly connected to the inner wall of the connecting sleeve 12. The connecting sleeve 12 is provided with a main shaft 43. The end of the main shaft 43 near the hollow drill rod 11 is provided with a fixing hole 42, and the fixing rod 14 cooperates with the fixing hole 42. The end of the main shaft 43 away from the hollow drill rod 11 is fixedly provided with a connecting plate 44, and the connecting plate 44 cooperates with the limiting plate 20. This avoids the main shaft 43 from deflecting or shaking during drilling rotation, ensuring the transmission accuracy when adjusting the cutter blade 21. At the same time, the threaded connection between the hollow drill rod 11 and the connecting sleeve 12 has a self-tightening tendency during drilling rotation, improving the overall connection of the device and effectively preventing the components from loosening during drilling, thus adapting to the complex construction environment of slope drilling.

[0021] Advantageously, a mud baffle 18 is provided on the side of the control panel 19 away from the limiting panel 20. The mud baffle 18 is fixedly connected to the inner wall of the connecting sleeve 12. The mud baffle 18 has multiple communicating holes 32 that communicate with the circulation pipe 29. An installation groove 33 is provided in the center of the mud baffle 18. A protective shell 16 is fixedly provided on the installation groove 33. A round hole 22 is provided on the side of the protective shell 16 near the hollow drill rod 11. The spindle 43 is sealed to the round hole 22. This solves the problem of control components failing due to mud entering the traditional drilling device, extends the service life of internal precision components, and ensures stability by fixing the protective structure, without affecting the overall rotary drilling, cutter blade 21 diameter adjustment, and stable power transmission of the device.

[0022] Advantageously, the limiting disk 20 has multiple control slots 37 on the side near the hollow drill rod 11, and a sliding rod 25 is slidably disposed within the control slots 37. The connecting sleeve 12 has multiple square holes 47 at the end away from the hollow drill rod 11, through which the sliding rod 25 passes. A fixing sleeve 38 is fixedly disposed at the end of the sliding rod 25 outside the connecting sleeve 12, and the fixing sleeve 38 is used to install the cutter wing 21. Multiple connecting blocks 45 are fixedly disposed around the periphery of the connecting disk 44, and the connecting blocks 45 cooperate with the control slots 37. This ensures the straightness of the cutter wing 21 during sliding adjustment, avoids the cutter wing 21 offset causing irregular drilling diameter, allows the cutter wing 21 to be subjected to more even force during rotational drilling, effectively disperses drilling reaction force, prevents the cutter wing 21 from deforming or falling off due to uneven force, and improves the stability of the device's drilling operation.

[0023] Advantageously, a sliding column 26 is fixedly provided at one end of the sliding rod 25 near the hollow drill rod 11. The control disk 19 has multiple arc-shaped grooves 35, with unequal distances from the two ends of each arc-shaped groove 35 to the center of the control disk 19. The sliding column 26 cooperates with the arc-shaped groove 35 to control the rotation of the control disk 19 relative to the limiting disk 20, causing the sliding column 26 to slide along the arc-shaped groove 35 while the sliding rod 25 slides along the control groove 37. This provides a stable and controllable power source for the diameter adjustment of the cutter wing 21. The motor drive enables stepless speed regulation and precise positioning of the cutter wing 21 diameter adjustment, adapting to the real-time diameter adjustment requirements during slope drilling. Simultaneously, the structure of the control sleeve 15 rotating with the main shaft 43 and the protective shell 16 providing sealing protection ensures interference-free operation of the drive components. The gear meshing transmission has high efficiency and large torque, adapting to the diameter adjustment resistance of the cutter wing 21 under different geotechnical conditions.

[0024] Advantageously, the main shaft 43 passes through the mud separator 18 and the control disk 19. A control sleeve 15 is rotatably mounted on the periphery of the main shaft 43. A key block 24 is fixedly mounted on the end of the control sleeve 15 away from the hollow drill rod 11. The control sleeve 15 is connected to the control disk 19 through the key block 24. The control sleeve 15 passes through the mud separator 18. A transmission gear 23 is fixedly mounted on the end of the control sleeve 15 away from the key block 24. A control motor 17 is fixedly mounted on the inner wall of the protective shell 16. A drive gear 31 is fixedly mounted on the output shaft of the control motor 17. The drive gear 31 meshes with the transmission gear 23. This ensures the installation stability of the circulation pipe 29 and does not affect the rotation of the control disk 19 or the diameter adjustment of the cutter blade 21. The cooperation between the limiting ring 28 and the stepped structure allows the circulation pipe 29 to remain axially fixed even when it swings slightly, effectively preventing leakage and blockage of the mud circulation passage and ensuring the normal operation of drilling slag removal and cooling.

[0025] Advantageously, the control panel 19 is provided with a plurality of mounting holes 36, which are staggered with the arc-shaped groove 35. The mounting holes 36 near the end of the hollow drill rod 11 form a stepped structure. The circulation pipe 29 passes through the mounting holes 36. A limiting ring 28 is fixedly provided on the outer side of the end of the circulation pipe 29 near the hollow drill rod 11. The limiting ring 28 cooperates with the stepped structure of the mounting holes 36.

[0026] Advantageously, a connecting groove 27 is formed on the inner side of the circulation pipe 29 near the end of the hollow drill rod 11, and a connecting pipe 34 communicating with the connecting hole 32 is fixedly provided on the side of the mud baffle 18 away from the hollow drill rod 11. The connecting pipe 34 cooperates with the connecting groove 27. This solves the problem of sealing the mud passage when the circulation pipe 29 swings with the control disc 19. The cooperation between the connecting groove 27 and the connecting pipe 34 allows the circulation pipe 29 to swing within a certain range, adapting to the positional change of the circulation pipe 29 when the cutter blade 21 is adjusted. At the same time, the sealed cooperation avoids mud leakage, which would lead to a decrease in slag discharge and cooling effect, and also prevents mud from entering the control component area from the cooperation gap.

[0027] Advantageously, the limiting plate 20 is provided with multiple sector-shaped slots 30, which are staggered with the control slot 37. The circulation pipe 29 passes through the sector-shaped slots 30, allowing the circulation pipe 29 to move within the range corresponding to the sector-shaped slots 30. Taking into account both the movement requirements of the circulation pipe 29 and the structural strength of the limiting plate 20, the range of the sector-shaped slots 30 is adapted to the maximum stroke of the blade wing 21, ensuring that the circulation pipe 29 does not collide or jam with other components during its swing.

[0028] Advantageously, the cutting wing 21 includes a matrix 40 and multiple diamond particles 41 disposed on the surface of the matrix 40. The matrix 40 and the fixing sleeve 38 are fixedly connected. A support groove 39 is fixedly provided on one side of the matrix 40. A support plate 46 is fixedly provided at the end of the connecting plate 44 away from the main shaft 43. The support plate 46 is slidably connected to the support groove 39. Before and after the cutting wing 21 slides, the power transmitted by the power head to the cutting wing 21 remains unchanged. The cutting wing 21 obtains drilling power by relying on the support plate 46 of the connecting plate 44 and its own support groove 39, rather than simply relying on the weak connection of the fixing sleeve 38. This structure further disperses the reaction force received by the cutting wing 21 during drilling, preventing the cutting wing 21 from bending or deforming due to excessive cantilever force. At the same time, the support plate 46 rotates with the connecting plate 44, driving the cutting wing 21 to rotate synchronously, ensuring the rotational stability of the cutting wing 21 during drilling, and significantly improving the drilling capacity, service life and drilling quality of the cutting wing 21.

[0029] Working principle of this invention: In the initial state, multiple blades 21 converge with each other, the variable diameter drill bit is in the minimum hole diameter state, the hollow drill rod 11 is connected to the power head of the ground drilling rig, the hydraulic pump station and vacuum pump are debugged, water is injected or mud is pumped into the drill bit position through the hollow drill rod 11, and a loop of mud and clean water is formed inside and outside the hollow drill rod 11. A mud pool is set up near the construction point to realize graded sedimentation and mud circulation.

[0030] In the initial stage of drilling, for the loose soil layer near the ground, a slightly larger borehole is required to ensure that the grouting pipe is lowered smoothly and that the grout can better penetrate into the surrounding rock and soil. The control motor 17 starts, controlling its output shaft to rotate, which drives the drive gear 31 to rotate together. Under meshing action, the drive gear 31 drives the transmission gear 23 to rotate, and the control sleeve 15 and the transmission gear 23 rotate synchronously. The control sleeve 15 drives the control disk 19 to rotate together through the key block 24. The arc groove 35 rotates together with the control disk 19, and the sliding column 26 slides in the arc groove 35, causing the sliding rod 25 to be forced to slide along the control groove 37. The fixed sleeve 38 and the cutter wing 21 move together with the sliding rod 25, and the support groove 39 and the support plate 46 slide relative to each other. The multiple cutter wings 21 move away from each other, realizing the expansion of the drill diameter.

[0031] During the above process, the mounting hole 36 rotates together with the control disk 19, which drives the circulation pipe 29 to move together. The circulation pipe 29 swings adaptively in the fan-shaped groove 30. The connecting groove 27, the mounting hole 36 and the connecting hole 32 always remain connected. Water is injected from the ground to the location of the cutter wing 21. After the clean water flows out and mixes with the rock and soil debris to form mud, the mud is then sucked out from the ground. A one-way circulation path is formed inside and outside the hollow drill rod 11. The power head transmits power to the lowest hollow drill rod 11. The threaded fit between the hollow drill rod 11 and the connecting sleeve 12 tends to tighten further during the rotation of the hollow drill rod 11, and will not loosen. The connecting sleeve 12 drives the connecting plate 13 and the fixing rod 14 to rotate synchronously. The spindle 43, connecting plate 44, connecting block 45 and support plate 46 rotate synchronously with the fixing rod 14. The body 40 is displaced during the drill bit diameter change. The body 40 and the support groove 39 move synchronously. The support groove 39 and the support plate 46 slide but do not separate. The rotation of the support plate 46 will drive the support groove 39 and the body 40 to rotate synchronously, so that the drill bit part formed by the cutter wing 21 rotates synchronously with the hollow drill rod 11.

[0032] In the later stages of drilling operations, smaller boreholes are required for hard rock layers far from the ground to reduce drilling resistance, improve efficiency, and avoid excessive wear of the drill bit. Drilling operations are carried out in conjunction with a ground sonar system to monitor the drilling progress in real time. If a partial collapse of the borehole wall is encountered, the borehole needs to be temporarily enlarged and the collapsed debris needs to be cleared to ensure continuous drilling and avoid the drill getting stuck. The operations of narrowing and enlarging the borehole are the same as those described above.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A drilling device for slope grouting, characterized in that: It includes a hollow drill rod, a connecting sleeve threaded to the hollow drill rod, a limiting plate disposed inside the connecting sleeve, multiple cutter wings installed at the end of the connecting sleeve away from the hollow drill rod and slidably connected to the limiting plate, a control plate installed inside the connecting sleeve for controlling the sliding of the cutter wings, and multiple circulation pipes disposed inside the connecting sleeve and penetrating through the control plate. Adjust the position of the cutter blades and change the borehole diameter based on the vertical changes in soil and rock density during slope drilling.

2. The drilling device for slope grouting according to claim 1, characterized in that: The connecting sleeve is provided with a fixing rod, and a connecting piece is fixed at each end of the fixing rod. The connecting piece is fixedly connected to the inner wall of the connecting sleeve. The connecting sleeve is provided with a main shaft. The end of the main shaft near the hollow drill rod is provided with a fixing hole. The fixing rod cooperates with the fixing hole. The end of the main shaft away from the hollow drill rod is provided with a connecting plate. The connecting plate cooperates with the limiting plate.

3. The drilling device for slope grouting according to claim 2, characterized in that: A mud baffle is provided on the side of the control panel away from the limiting plate. The mud baffle is fixedly connected to the inner wall of the connecting sleeve. The mud baffle is provided with multiple connecting holes that communicate with the circulation pipe. An installation groove is provided in the center of the mud baffle. A protective shell is fixedly provided on the installation groove. A round hole is provided on the side of the protective shell near the hollow drill rod. The spindle is sealed with the round hole.

4. The drilling device for slope grouting according to claim 2, characterized in that: The limiting plate has multiple control slots on the side near the hollow drill rod, and a sliding rod is slidably installed in the control slots. The connecting sleeve has multiple square holes at the end away from the hollow drill rod, and the sliding rod passes through the square holes. A fixing sleeve is fixedly installed at the end of the sliding rod outside the connecting sleeve, and the fixing sleeve is used to install the cutter wing. Multiple connecting blocks are fixedly installed on the periphery of the connecting plate, and the connecting blocks cooperate with the control slots.

5. A drilling device for slope grouting according to claim 1, characterized in that: A sliding column is fixedly provided at one end of the sliding rod near the hollow drill rod. The control panel is provided with multiple arc-shaped grooves. The distances from the two ends of each arc-shaped groove to the center of the control panel are not equal. The sliding column cooperates with the arc-shaped groove to control the rotation of the control panel relative to the limiting plate, so that the sliding column slides along the arc-shaped groove while the sliding rod slides along the control groove.

6. A drilling device for slope grouting according to claim 3, characterized in that: The main shaft passes through the mud baffle and the control disk. A control sleeve is rotatably mounted on the circumference of the main shaft. A key block is fixed at the end of the control sleeve away from the hollow drill rod. The control sleeve is connected to the control disk through the key block. The control sleeve passes through the mud baffle. A transmission gear is fixed at the end of the control sleeve away from the key block. A control motor is fixed on the inner wall of the protective shell. A drive gear is fixed on the output shaft of the control motor. The drive gear meshes with the transmission gear.

7. A drilling device for slope grouting according to claim 5, characterized in that: The control panel has multiple mounting holes, which are staggered with the arc-shaped grooves. The end of the mounting hole near the hollow drill rod forms a stepped structure. The circulation pipe passes through the mounting hole. A limiting ring is fixedly provided on the outer side of the end of the circulation pipe near the hollow drill rod. The limiting ring cooperates with the stepped structure of the mounting hole.

8. A drilling device for slope grouting according to claim 3, characterized in that: A connecting groove is formed on the inner side of the circulation pipe near one end of the hollow drill rod. A connecting pipe communicating with the connecting hole is fixed on the side of the mud baffle away from the hollow drill rod. The connecting pipe cooperates with the connecting groove.

9. A drilling device for slope grouting according to claim 1, characterized in that: The limiting plate is provided with multiple sector-shaped slots, which are staggered with the control slots. The circulation pipe passes through the sector-shaped slots, allowing the circulation pipe to move within the range corresponding to the sector-shaped slots.

10. A drilling device for slope grouting according to claim 4, characterized in that: The blade includes a body and a plurality of diamond particles disposed on the surface of the body. The body and the fixing sleeve are fixedly connected. A support groove is fixedly provided on one side of the body. A support plate is fixedly provided at the end of the connecting plate away from the main shaft. The support plate is slidably connected to the support groove.

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