Drilling tool for drilling and expanding pile hole

Abstract

The utility model discloses a drilling tool for drilling and expanding pile holes, which belongs to the technical field of drilling tools and comprises a first drilling barrel and an assembly plate arranged at the upper end of the first drilling barrel, a second drilling barrel is mounted on the inner wall of the lower portion of the first drilling barrel, a third drilling barrel is mounted on the inner wall of the lower portion of the second drilling barrel, and a top drill bit is mounted on the inner wall of the lower portion of the third drilling barrel. And the lower ends of the first drilling cylinder, the second drilling cylinder and the third drilling cylinder are provided with drilling teeth which are annularly distributed. According to the utility model, the position of the top drill bit can be adjusted according to the difference of geological environments, so that the top drill bit moves inwards or outwards and is locked through the fixing bolt, and meanwhile, the positions of the second drill barrel and the third drill barrel can be sequentially adjusted, so that the first drill barrel, the second drill barrel and the third drill barrel are flush with the top drill bit under the condition that the geology is soft; and under the condition that the geology is hard, the drilling holes are arranged in a step shape and protrude outwards, so that the drilling operation can be more effectively carried out, and the adaptability is further improved.

Description

Technical Field

[0001] This utility model relates to a drilling tool, and more particularly to a drilling tool for drilling and enlarging pile holes, belonging to the field of drilling tool technology. Background Technology

[0002] Drilling tools are the drill bits used by pile drilling machines. Since it is necessary to drill deep pile holes into the ground, the drill bits used must be adaptable to various geological environments.

[0003] In the prior art, such as the Chinese authorized patent CN202420079567.1, a drilling tool for expanding pile holes utilizes a scraper mechanism as the working face for hole opening. Compared with existing drilling tools, this tool has a larger contact area with the soil during drilling, thus making it more efficient. Simultaneously, the opening at the bottom plate collects the mud generated during drilling, reducing the amount of mud residue remaining in the borehole.

[0004] However, since both the drill bit and the scraper mechanism are on the same horizontal plane, it can only be used for drilling in soft soil. It cannot effectively drill downwards in harder soil, and the drilling tool cannot be adjusted and adapted according to the actual situation. Utility Model Content

[0005] The main purpose of this utility model is to solve the problem that when the drill bit and scraper mechanism are on the same horizontal plane, they can only be used for drilling in soft soil, and cannot effectively drill downwards in harder soil, and the drilling tool cannot be adjusted and adapted according to the actual situation. Therefore, this utility model provides a drilling tool for drilling and enlarging pile holes.

[0006] The objective of this utility model can be achieved by adopting the following technical solution:

[0007] A drilling tool for drilling and enlarging pile holes includes a first drill cylinder and an assembly plate disposed on the upper end of the first drill cylinder. A second drill cylinder is installed on the lower inner wall of the first drill cylinder, and a third drill cylinder is installed on the lower inner wall of the second drill cylinder. A top drill bit is installed on the lower inner wall of the third drill cylinder. Drill teeth distributed in a ring are installed at the lower ends of the first drill cylinder, the second drill cylinder, and the third drill cylinder.

[0008] Furthermore, a water inlet is provided on the upper side wall of the first drill barrel.

[0009] Furthermore, a water outlet is provided in the middle of the assembly plate.

[0010] Furthermore, the outlet is connected to the inlet.

[0011] Furthermore, the assembly plate is provided with a plurality of assembly holes.

[0012] Furthermore, the second drill barrel, the third drill barrel, and the top drill bit all have multiple threaded holes on their sidewalls.

[0013] Furthermore, the first drill barrel, the second drill barrel, and the third drill barrel are all provided with fixing holes that are adapted to the threaded holes on their side walls.

[0014] Furthermore, the first drill barrel, the second drill barrel, and the third drill barrel all have movable cavities inside.

[0015] Furthermore, the outer wall of the top drill bit is slidably connected to the inner wall of the third drill barrel.

[0016] Furthermore, the outer wall of the third drill barrel is slidably connected to the inner wall of the second drill barrel, and the outer wall of the second drill barrel is slidably connected to the inner wall of the first drill barrel.

[0017] The beneficial technical effects of this utility model are as follows: According to the drilling tool for drilling and enlarging pile holes of this utility model, the position of the top drill bit can be adjusted to move it inward or outward and locked by fixing bolts, depending on the geological environment. At the same time, the positions of the second and third drill barrels can be adjusted in sequence. In softer geological conditions, the first, second, and third drill barrels are flush with the top drill bit, and in harder geological conditions, they are arranged in a stepped shape and protrude outward, which can more effectively carry out drilling operations and thus improve adaptability. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure according to a preferred embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the bottom structure of the first drill barrel according to a preferred embodiment of the present invention;

[0020] Figure 3 This is a perspective view of the internal structure of the first drill barrel, the second drill barrel, and the third drill barrel according to a preferred embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the second drill barrel structure according to a preferred embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the third drill barrel structure according to a preferred embodiment of the present invention;

[0023] Figure 6 This is a schematic diagram of a top drill bit structure according to a preferred embodiment of the present invention.

[0024] In the diagram: 1. First drill barrel; 2. Assembly plate; 3. Water inlet; 4. Water outlet; 5. Assembly hole; 6. Fixing bolt; 7. Drill teeth; 8. Second drill barrel; 9. Third drill barrel; 10. Top drill bit. Detailed Implementation

[0025] To enable those skilled in the art to understand the technical solution of this utility model more clearly, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of this utility model is not limited thereto.

[0026] like Figures 1-6 As shown, the drilling tool for drilling and enlarging pile holes provided in this embodiment includes a first drill cylinder 1 and an assembly plate 2 disposed on the upper end of the first drill cylinder 1. A second drill cylinder 8 is installed on the lower inner wall of the first drill cylinder 1, a third drill cylinder 9 is installed on the lower inner wall of the second drill cylinder 8, and a top drill bit 10 is installed on the lower inner wall of the third drill cylinder 9. The drilling tool is assembled using a pile drilling machine of the prior art, and a hollow drill rod is used in conjunction with the drilling tool. It is connected to the water outlet 4 on the drilling tool to effectively extract mud and other liquids. The lower ends of the first drill cylinder 1, the second drill cylinder 8, and the third drill cylinder 9 are all equipped with drill teeth 7 arranged in a ring. A water inlet 3 is opened on the upper side wall of the first drill cylinder 1, and a water outlet 4 is opened in the middle of the assembly plate 2. The water outlet 4 is connected to the water inlet 3. The assembly plate 2 is provided with a number of assembly holes 5. The side walls of the second drill cylinder 8, the third drill cylinder 9, and the top drill bit 10 are all provided with a number of threaded holes. The side walls of drill barrel 1, drill barrel 8, and drill barrel 9 are all provided with fixing holes adapted to threaded holes. The interiors of drill barrel 1, drill barrel 8, and drill barrel 9 are all provided with movable cavities. The outer wall of the top drill bit 10 is slidably connected to the inner wall of the third drill barrel 9, the outer wall of the third drill barrel 9 is slidably connected to the inner wall of the second drill barrel 8, and the outer wall of the second drill barrel 8 is slidably connected to the inner wall of the first drill barrel 1. Depending on the geological environment, the position of the top drill bit 10 can be adjusted to move it inward or outward and locked by the fixing bolt 6. At the same time, the positions of the second drill barrel 8 and the third drill barrel 9 can be adjusted in sequence. In softer geological conditions, the first drill barrel 1, the second drill barrel 8, and the third drill barrel 9 are made flush with the top drill bit 10. In harder geological conditions, they are arranged in a stepped shape and protrude outward, which can more effectively carry out drilling operations and thus improve adaptability.

[0027] In summary, the drilling tool for expanding pile holes according to this embodiment is easy to use. It can adjust the position of the top drill bit 10 to move it inward or outward and lock it with the fixing bolt 6, depending on the geological environment. At the same time, the positions of the second drill barrel 8 and the third drill barrel 9 can be adjusted in sequence. In softer geological conditions, the first drill barrel 1, the second drill barrel 8 and the third drill barrel 9 are flush with the top drill bit 10. In harder geological conditions, they are arranged in a stepped shape and protrude outward, which can more effectively carry out drilling operations and improve adaptability.

[0028] The above description is only a further embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope disclosed by the present utility model, based on the technical solution and concept of the present utility model, shall fall within the protection scope of the present utility model.

Claims

1. A drilling tool for drilling and enlarging pile holes, characterized in that, The system includes a first drill barrel (1) and an assembly plate (2) disposed on the upper end of the first drill barrel (1). A second drill barrel (8) is installed on the lower inner wall of the first drill barrel (1). A third drill barrel (9) is installed on the lower inner wall of the second drill barrel (8). A top drill bit (10) is installed on the lower inner wall of the third drill barrel (9). Drill teeth (7) arranged in a ring are installed at the lower ends of the first drill barrel (1), the second drill barrel (8) and the third drill barrel (9). Multiple threaded holes are opened on the side walls of the second drill barrel (8), the third drill barrel (9) and the top drill bit (10). Fixing holes adapted to the threaded holes are opened on the side walls of the first drill barrel (1), the second drill barrel (8) and the third drill barrel (9).

2. The drilling tool for drilling and enlarging pile holes according to claim 1, characterized in that, The upper side wall of the first drill barrel (1) is provided with a water inlet (3).

3. The drilling tool for drilling and enlarging pile holes according to claim 2, characterized in that, The assembly plate (2) has a water outlet (4) in the middle.

4. The drilling tool for drilling and enlarging pile holes according to claim 3, characterized in that, The outlet (4) is connected to the inlet (3).

5. A drilling tool for drilling and enlarging pile holes according to claim 3, characterized in that, The assembly plate (2) is provided with a number of assembly holes (5).

6. The drilling tool for drilling and enlarging pile holes according to claim 1, characterized in that, The first drill barrel (1), the second drill barrel (8) and the third drill barrel (9) all have movable cavities inside.

7. A drilling tool for drilling and enlarging pile holes according to claim 6, characterized in that, The outer wall of the top drill bit (10) is slidably connected to the inner wall of the third drill barrel (9).

8. A drilling tool for drilling and enlarging pile holes according to claim 6, characterized in that, The outer wall of the third drill barrel (9) is slidably connected to the inner wall of the second drill barrel (8), and the outer wall of the second drill barrel (8) is slidably connected to the inner wall of the first drill barrel (1).

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