CN218644223U

CN218644223U - Hierarchical pore-forming T-shaped drill bit for rotary digging construction

Info

Publication number: CN218644223U
Application number: CN202223014219.6U
Authority: CN
Inventors: 刘剑; 陈建国; 李维明; 许谷星; 雷斌; 龚共龙
Original assignee: Jiangxi Geological Engineering Group Co ltd
Current assignee: Jiangxi Geological Engineering Group Co ltd
Priority date: 2022-11-14
Filing date: 2022-11-14
Publication date: 2023-03-17
Anticipated expiration: 2032-11-14

Abstract

The utility model discloses a dig construction grading pore-forming T shape drill bit soon belongs to foundation technical field, and its technical scheme main points are, including creeping into drill bit and guide cylinder drill bit, creep into and be connected with the drilling rod between drill bit and the guide cylinder drill bit, the diameter that creeps into the drill bit is greater than the diameter of guide cylinder drill bit, creep into the drill bit with the guide cylinder drill bit all sets up to uncovered tube-shape. The rotary excavating construction grading pore-forming T-shaped drill bit can provide lateral support and guarantee perpendicularity for the rotary excavating drill bit during drilling in a hard rock stratum.

Description

Hierarchical pore-forming T-shaped drill bit for rotary digging construction

Technical Field

The utility model relates to a foundation field specifically is a dig construction grading pore-forming T shape drill bit soon.

Background

In the drilling construction, the grading pore-forming drilling process fully exerts the characteristic of high pore-forming speed of the rotary drilling rig, uses the low-power drilling rig to complete the construction task which can only be completed by the high-power drilling rig, and is widely applied to the rotary drilling construction of the large-diameter hard rock cast-in-place pile. When the hard rock stratum is steep or the integrity of the rock mass is poor, the traditional graded hole forming drill bit has poor hole drilling correction capability, poor guidance quality and insufficient lateral support strength, so that the drilling verticality is poor, the hole forming efficiency is reduced, and the quality of a pile hole is difficult to ensure. Therefore, the traditional straight drill bit needs to be improved, and a rotary drilling construction grading hole forming T-shaped drill bit is created.

SUMMERY OF THE UTILITY MODEL

To the problem that exists among the prior art, the utility model aims to provide a dig construction soon and grade pore-forming T shape drill bit provides the side direction when boring in hard rock stratum for digging the drill bit soon and support and guarantee its straightness that hangs down.

The above technical purpose of the present invention can be achieved by the following technical solutions: the utility model provides a dig construction grading pore-forming T shape drill bit soon, is including boring into drill bit and direction cylinder drill bit, it is connected with the drilling rod to creep into between drill bit and the direction cylinder drill bit, the diameter that creeps into the drill bit is greater than the diameter of direction cylinder drill bit, creep into the drill bit with direction cylinder drill bit all sets up to uncovered tube-shape.

In some embodiments, the open-ended, equidistant annular array of the drill bits has a plurality of cones.

In some embodiments, the roller cones are provided with protrusions, and a plurality of the roller cones are arranged alternately in a state where the protrusions are directed toward the inner side of the bit and toward the outer side of the bit.

In some embodiments, the open end of the pilot barrel drill bit has a plurality of scraping teeth in an equally spaced annular array.

In some embodiments, the end of the drilling bit remote from the opening is provided with a connecting frame.

To sum up, the utility model discloses following beneficial effect has:

the utility model discloses the drill bit structure of T word shape not only plays and carries out hierarchical underreamed effect in the stratum, can also utilize to creep into and carry out the direction on drill bit and the direction cylinder drill bit and creep into, for providing the side direction support and guarantee its straightness that hangs down when digging the drill bit soon and creep into in the hard stratum, avoids the drill bit to produce the incline at the in-process that creeps into, has guaranteed the pore-forming effect.

Drawings

Fig. 1 is a schematic view of a first overall structure of the present invention;

fig. 2 is a schematic view of a second overall structure of the present invention.

In the figure: 1. drilling a drill bit; 11. a connecting frame; 12. a cone; 2. a drill stem; 3. a pilot barrel drill bit; 31. and (5) scraping teeth.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-2, a hierarchical pore-forming T-shaped drill bit for rotary drilling construction comprises a drilling drill bit 1 and a guide cylinder type drill bit 3, wherein a drill rod 2 is connected between the drilling drill bit 1 and the guide cylinder type drill bit 3, the diameter of the drilling drill bit 1 is larger than that of the guide cylinder type drill bit 3, the drilling drill bit 1 and the guide cylinder type drill bit 3 are both arranged in an open cylinder shape, a plurality of cones 12 are arranged on an equidistant annular array at the open end of the drilling drill bit 1, a connecting frame 11 is arranged at one end, far away from the open end, of the drilling drill bit 1, when the drill bit structure is used, an operator firstly connects the connecting frame 11 with the drill rod of a rotary drilling rig through bolts to connect the rotary drilling rig with the T-shaped drill bit, then places the guide cylinder type drill bit 3 inside a pre-drilled pile hole to guide, then opens the rotary drilling rig to drive the T-shaped drill bit to drill, during drilling of the rotary drilling, the guide cylinder type drill bit 3 provides lateral supporting force for the T-shaped drill bit and provides guidance for the drilling drill bit 1, so that the rotary drilling rig does not deviate in the direction during drilling process of the drilling, thereby ensuring the perpendicularity of the T-shaped drill bit and the T-shaped drill bit to enlarge the hole, and ensure the verticality of the hole, and the effect, and finally the peripheral foundation rock formation is achieved; the utility model discloses a creep into the cooperation of drill bit 1 and guide cylinder drill bit 3, not only can carry out hierarchical pore-forming at the in-process that creeps into, can also utilize guide cylinder drill bit 3 to creep into the direction, avoid producing the skew at the in-process direction that creeps into, provide the side direction when creeping into and support and guarantee the straightness that hangs down, ensure the pore-forming effect.

In some embodiments, the cones 12 are provided with protrusions, and the plurality of cones 12 are arranged at intervals in a state that the protrusions face the inner side of the drill bit 1 and the outer side of the drill bit 1, and the protrusions at intervals can enable the drilling drill bit 1 to carry out bidirectional damage on bedrock in the drilling process, so that the drilling efficiency is improved.

In some embodiments, the open end of the barrel bit 3 has a plurality of scraping teeth 31 in an equidistant annular array so that the bottom edge of the barrel bit 3 is protected from pressure damage when the barrel bit 3 contacts the bottom of the pile hole.

In some embodiments, the outer layers of the drill bit 1 and the guide cylinder bit 3 are welded with alloy to protect the bodies of the drill bit 1 and the guide cylinder bit 3 from being scratched by the rock formation during drilling.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims

1. The utility model provides a dig construction stage pore-forming T shape drill bit soon, includes and creeps into drill bit (1) and guide cylinder drill bit (3), its characterized in that: a drill rod (2) is connected between the drilling drill bit (1) and the guide cylinder type drill bit (3), the diameter of the drilling drill bit (1) is larger than that of the guide cylinder type drill bit (3), and the drilling drill bit (1) and the guide cylinder type drill bit (3) are both arranged to be in an open cylinder shape.

2. The rotary excavating construction graded hole forming T-shaped drill bit as claimed in claim 1, characterized in that: the open end of the drilling bit (1) is provided with a plurality of cones (12) in an equidistant annular array.

3. The rotary excavating construction graded hole forming T-shaped drill bit according to claim 2, characterized in that: the roller cones (12) are provided with protrusions, and the roller cones (12) are arranged at intervals in a state that the protrusions face towards the inner side of the drilling bit (1) and the outer side of the drilling bit (1).

4. The rotary excavating construction graded hole forming T-shaped drill bit according to claim 1, characterized in that: a plurality of scraping teeth (31) are arranged on the open end of the guide cylinder type drill bit (3) in an equidistant annular array mode.

5. The rotary excavating construction graded hole forming T-shaped drill bit as claimed in claim 1, characterized in that: and a connecting frame (11) is arranged at one end of the drilling bit (1) far away from the opening.