Stirring pile drill bit

Abstract

The utility model provides a mixing pile drill bit. The mixing pile drill bit comprises a drill rod, blades and cutter teeth. The blade is fixedly connected with the drill rod, and a slurry conveying hole in the blade is communicated with a slurry conveying channel in the drill rod; the cutter teeth are clamped with the blades, each cutter tooth comprises a supporting part, a connecting pipe is fixedly connected to the supporting part, the connecting pipes are arranged on the blades in a penetrating mode, locking bolts abutting against the blades are screwed to the ends of the connecting pipes, and the slurry conveying holes are communicated with the slurry spraying openings in the supporting parts through the connecting pipes. The cutter teeth are detachably fixed to the blades through cooperation of the connecting pipes and the locking bolts, communication of the slurry spraying openings in the cutter teeth and the slurry conveying holes in the blades is kept, and the cutter teeth can be conveniently detached and replaced.

Description

Technical Field

[0001] The present application relates to the technical field of building construction, and in particular to a mixing pile drill bit. Background Art

[0002] Cement mixing piles are an effective form of soft foundation treatment. They use cement as the main agent of the curing agent. A mixing pile machine is used to spray the cement into the soil and fully mix it, causing a series of physical and chemical reactions between the cement and the soil, hardening the soft soil and improving the foundation strength.

[0003] A pile drill bit is a crucial component of a pile mixing machine. It typically consists of a drill rod, blades, and cutter teeth. To avoid the adverse effects of an externally located shotcrete pipe, existing pile drill bits typically incorporate a shotcrete channel within the blades. To ensure structural strength, the cutter teeth are typically welded to the blades, making them difficult to remove and replace. To address this issue, the inventors have proposed a pile drill bit. Utility Model Content

[0004] The present application provides a mixing pile drill bit, which can facilitate the disassembly and replacement of the cutter teeth.

[0005] The technical solution of this application is as follows:

[0006] The present application provides a mixing pile drill bit, which comprises: a drill rod, blades and cutter teeth;

[0007] The blade is fixedly connected to the drill pipe, and the slurry delivery hole inside the blade is connected to the slurry delivery channel inside the drill pipe;

[0008] The blade teeth are engaged with the blades, and the blade teeth include a supporting portion, on which a connecting pipe is fixed, which passes through the blades, and the end of the connecting pipe is screwed with a locking bolt that abuts the blades, and the connecting pipe connects the slurry delivery hole with the grouting port on the supporting portion.

[0009] By adopting the technical solution of the present application, the connection pipe and the locking bolt cooperate to fix the cutter teeth on the blade in a detachable manner, and maintain the connection between the spraying port on the cutter teeth and the slurry delivery hole in the blade, which can facilitate the disassembly and replacement of the cutter teeth.

[0010] In some implementations, the blades are arranged perpendicular to the drill pipe.

[0011] In some implementations, the slurry delivery hole extends along the longitudinal direction of the blade.

[0012] In some implementations, the blade is provided with a through hole for passing the connecting pipe.

[0013] In some implementations, the through hole is connected to the slurry delivery hole.

[0014] In some implementations, the through hole is arranged parallel to the drill rod.

[0015] In some implementations, the blade tooth has a right-angled engaging surface for engaging with the blade.

[0016] In some implementations, the axis of the spray port is perpendicular to both the axis of the through hole and the axis of the slurry delivery hole.

[0017] In some implementations, a side wall of the connecting pipe is provided with a communication port located inside the slurry delivery hole.

[0018] In some implementations, the communication ports are evenly distributed along the circumference of the connecting pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The exemplary embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the embodiments described below are only used to explain the present application, rather than to limit the scope of the present application. In the accompanying drawings:

[0020] Figure 1 is a schematic diagram of a mixing pile drill bit according to an embodiment of the present application;

[0021] Figure 2 is a schematic diagram of a cutter tooth according to an embodiment of the present application;

[0022] Figure 3 is a schematic diagram of a knife tooth according to another perspective of an embodiment of the present application;

[0023] Figure 4 This is a schematic diagram of the installation of the cutter teeth according to an embodiment of the present application;

[0024] Reference numerals:

[0025] 10. Drill rod; 11. Slurry delivery channel; 12. Drill bit;

[0026] 20. Blade; 21. Slurry delivery hole; 22. Through hole;

[0027] 30. Blade teeth; 31. Support portion; 32. Spraying port; 33. Connecting pipe; 34. Connecting port; 35. Snap-fit ​​surface; 36. Locking bolt. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of this application clearer, the application is further described in detail below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain this application and are not used to limit this application.

[0029] In related technologies, cement mixing piles are an effective form of soft foundation treatment. They use cement as the main agent of the curing agent, and use a mixing pile machine to spray the cement into the soil and mix it thoroughly, so that a series of physical and chemical reactions occur between the cement and the soil, hardening the soft soil and improving the foundation strength.

[0030] The mixing pile drill bit is an important component of the mixing pile machine. The mixing pile drill bit usually includes a drill rod, blades and cutter teeth. In order to avoid the adverse effects caused by the external placement of the shotcrete pipe, a shotcrete channel is usually provided on the blade of the existing mixing pile drill bit. In order to ensure structural strength, the cutter teeth are usually welded to the blades, which makes it inconvenient to disassemble and replace the cutter teeth.

[0031] This embodiment provides a mixing pile drill bit, which can facilitate the disassembly and replacement of the cutter teeth.

[0032] See also Figures 1-4 In this embodiment, a mixing pile drill bit includes a drill rod 10, a blade 20 and a cutter tooth 30; wherein the blade 20 is fixedly connected to the drill rod 10, and the slurry delivery hole 21 inside the blade 20 is connected to the slurry delivery channel 11 inside the drill rod 10; the cutter tooth 30 is engaged with the blade 20, and the cutter tooth 30 includes a support portion 31, and a connecting pipe 33 is fixedly connected to the support portion 31. The connecting pipe 33 is passed through the blade 20, and the end of the connecting pipe 33 is screwed with a locking bolt 36 that abuts against the blade 20. The connecting pipe 33 connects the slurry delivery hole 21 with the grouting port 32 on the support portion 31.

[0033] By adopting the technical solution of this embodiment, the connection pipe 33 and the locking bolt 36 cooperate to fix the tooth 30 on the blade 20 in a detachable manner, and maintain the connection between the spraying port 32 on the tooth 30 and the slurry delivery hole 21 in the blade 20, which can facilitate the disassembly and replacement of the tooth 30.

[0034] In this embodiment, the drill rod 10 is constructed into a hollow circular tube, and a slurry delivery channel 11 for conveying cement slurry is formed inside the drill rod 10. The lower end of the drill rod 10 is closed, and a drill bit 12 is fixedly connected to the lower end of the drill rod 10. The drill rod 12 as a whole rotates under the drive of the external environment.

[0035] In this embodiment, the blade 20 is constructed into a rectangular plate shape, the plane where the blade 20 is located is perpendicular to the drill rod 10, and the blade 20 is arranged along the radial direction of the drill rod 10. A slurry delivery hole 21 is provided inside the blade 20, and the slurry delivery hole 21 extends along the longitudinal direction of the blade 20. The slurry delivery hole 21 remains connected with the slurry delivery channel 11.

[0036] In addition, a plurality of through holes 22 are provided on the blade 20, and the through holes 22 extend from the lower surface of the blade 20 to the upper surface. The through holes 22 are connected to the slurry delivery hole 21. For example, the axis of the through hole 22 intersects the axis of the slurry delivery hole 21 at right angles. At the same time, the axis of the through hole 22 is parallel to the axis of the slurry delivery through hole 11 on the drill rod 10.

[0037] In this embodiment, the tooth 30 is constructed as a triangle as a whole, and a support portion 31 is integrally formed on one side wall of the tooth 30. The support portion 31 is constructed as a rectangular plate as a whole. A right-angled clamping surface 35 is enclosed between the support portion 31 and the tooth 30, and the clamping surface 35 is used to fit with the outer wall of the blade 20.

[0038] In addition, a grouting port 32 is provided inside the support portion 31. The grouting port 32 is arranged at an end of the support portion 31 away from the cutter teeth 30, and the opening direction of the grouting port 32 is opposite to the rotation direction of the drill rod 10. The axis of the grouting port 32 is perpendicular to the axis of the through hole 22 and the axis of the slurry delivery hole 21.

[0039] In addition, a connecting pipe 33 is fixedly connected to the support portion 31, and the connecting pipe 33 is arranged on the clamping surface 35. The connecting pipe 33 is entirely passed through the through hole 22 on the blade 20. The lower end of the connecting pipe 33 is connected to the grouting port 32, and a locking bolt 36 is screwed on the upper end of the connecting pipe 33. The bolt head of the locking bolt 36 abuts the top surface of the blade 20. The locking bolt 36 cooperates with the threaded connection of the connecting pipe 33 to fix the tooth 30 on the blade 20. A connecting port 34 located inside the slurry delivery hole 21 is provided on the side wall of the connecting pipe 33, and the connecting port 34 is evenly distributed along the circumference of the connecting pipe 33. The connecting port 34 on the connecting pipe 33 connects the slurry delivery hole 21 in the blade 20 with the grouting port 32 on the tooth 30.

[0040] It should be noted that the locking bolt 36 is screwed into the upper end of the connecting tube 33, which can close the top of the connecting tube 33. At the same time, the locking bolt 36 fixes the cutter tooth 30 on the blade 20 through the connecting tube 33, and maintains the connection between the slurry delivery hole 21 in the blade 20 and the spraying port 32 in the support part 31. The detachable connection between the cutter tooth 30 and the blade 20 makes it easier to disassemble and replace the cutter tooth 30.

[0041] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A mixing pile drill bit, characterized in that: include: Drill pipe; a blade, wherein the blade is fixedly connected to the drill rod, and a slurry delivery hole inside the blade is connected to a slurry delivery channel inside the drill rod; The blade teeth are engaged with the blades, and the blade teeth include a support portion, a connecting pipe is fixedly connected to the support portion, and the connecting pipe is passed through the blade. The end of the connecting pipe is screwed with a locking bolt that abuts the blade, and the connecting pipe connects the slurry delivery hole with the spraying port on the support portion.

2. The mixing pile drill bit according to claim 1, characterized in that: The blades are arranged perpendicular to the drill pipe.

3. The mixing pile drill bit according to claim 2, characterized in that: The slurry delivery hole extends along the longitudinal direction of the blade.

4. The mixing pile drill bit according to claim 3, characterized in that: The blades are provided with through holes for passing the connecting pipes.

5. The mixing pile drill bit according to claim 4, characterized in that: The through hole is communicated with the slurry delivery hole.

6. The mixing pile drill bit according to claim 5, characterized in that: The through hole is arranged parallel to the drill rod.

7. The mixing pile drill bit according to claim 6, characterized in that: The blade tooth has a right-angled engaging surface for engaging with the blade.

8. The mixing pile drill bit according to claim 7, characterized in that: The axis of the spraying port is perpendicular to the axis of the through hole and the axis of the slurry delivery hole.

9. The mixing pile drill bit according to claim 8, characterized in that: The side wall of the connecting pipe is provided with a communication port located inside the slurry delivery hole.

10. The mixing pile drill bit according to claim 9, characterized in that: The communication openings are evenly distributed along the circumference of the connecting pipe.

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