CN216406702U

CN216406702U - Dedicated drill bit of digging soon of pile foundation pore-forming

Info

Publication number: CN216406702U
Application number: CN202123185581.5U
Authority: CN
Inventors: 李益辉; 尹卫东
Original assignee: Jiangsu Jianneng Construction Technology Co ltd
Current assignee: Jiangsu Jianneng Construction Technology Co ltd
Priority date: 2021-12-17
Filing date: 2021-12-17
Publication date: 2022-04-29
Anticipated expiration: 2031-12-17

Abstract

The utility model discloses a rotary drilling bit special for pile foundation pore-forming, which comprises a drill rod and a drill bit, wherein a drill bit directional frame is arranged on the drill rod at a position close to the drill bit, and a helical blade is arranged between the middle of the drill rod and the tail part of the drill bit. The design of the helical blades ensures that the soil taking is efficient and the hole forming speed is high; the triangular fixing frame is additionally welded on the drill bit, so that the verticality of the drill bit is controlled, the problem that the drill bit is prone to inclined drilling at a soft and hard soil junction is solved, and the smooth construction of engineering safety is effectively guaranteed.

Description

Dedicated drill bit of digging soon of pile foundation pore-forming

Technical Field

The utility model relates to the technical field of drill bits, in particular to a rotary drilling bit special for pile foundation hole forming.

Background

In the current construction of the cast-in-situ bored pile, a rotary drilling rig is usually adopted for pile foundation pore-forming, the drilling speed in a soil layer is high, the soil is convenient to transport, and after the pile foundation pore-forming enters a hard rock layer, particularly in weathered rocks and under the condition of large rock-entering depth, the progress is slow, the soil is difficult to take, the construction efficiency is remarkably reduced, and the loss of a drilling tool is increased, so that the construction cost of the rotary drilling rig in the rock-entering stage is remarkably increased. In the field construction process, part of the cast-in-situ bored piles need to pass through the raw water soil stirring pile, half of the drill bits fall on the raw water soil stirring pile, and the other half of the drill bits fall on the original sludge soil; in addition, the cast-in-place pile is very easy to cause the occurrence of the deflection drilling phenomenon due to the uneven soft and hard soil in the drilling process of the drill bit, so that a rotary drilling bit special for pile foundation pore-forming is needed to solve the defects in the prior art and ensure the safe and smooth construction of engineering.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: aiming at the problems and the defects in the prior art, the utility model aims to provide a rotary drilling bit special for pile foundation hole forming. The soil taking is efficient, the pore-forming speed is high, the drill bit is additionally welded with the triangular fixing frame, the verticality of the drill bit is controlled, and the problem that the drill bit is prone to drilling at a soft and hard soil junction is solved.

The technical scheme is as follows: in order to achieve the purpose, the rotary drilling bit special for pile foundation hole forming comprises a drill rod and a drill bit, wherein a drill bit directional frame is welded at a position, close to the drill bit, on the drill rod, and a helical blade is arranged between the middle of the drill rod and the tail of the drill bit.

Further, the drill bit directional frame is a tripod. The tripod can reduce the rock of the drill bit in the drilling process, better control the drilling verticality of the drill bit and solve the problem of deviated drilling caused by uneven soft and hard soil. The tripod is welded on the drill bit, and the problem of inclined drilling caused by uneven soft and hard soil in the drilling process is better solved. The probability of striving for the deviated drilling is reduced to be within 1% from about 30% at present. The construction period is shortened by 1/3, the filling coefficient of the concrete is pulled back to about 1.1 from about 1.4 at present, and the whole construction cost is reduced by 20%.

Furthermore, the drill bit orientation frame comprises an upper fixed inner ring, an upper fixed outer ring, a transverse connecting rod, a lower fixed ring and a longitudinal inclined connecting rod, wherein the lower fixed ring is sleeved at the bottom end of the drill bit, the upper fixed inner ring is sleeved at the upper end of the drill bit, the upper fixed outer ring is arranged on the outer side of the upper fixed inner ring, and the upper fixed inner ring and the lower fixed outer ring are connected through the transverse connecting rod; the longitudinal inclined connecting rod is arranged between the upper fixed outer ring and the lower fixed ring.

Further, the head of the drill is provided with a drill tip, and the angle of the drill tip is 30-35 degrees.

Furthermore, a round through hole is formed in the position, 2-3mm away from the drill tip, of the drill bit. The round through hole is designed for the heat dissipation of the drill bit, so that heat generated by the drill bit in drilling processing is dissipated in time, the drill tip is prevented from tipping, and the service life of the drill bit is prolonged.

Further, the drill bit and the drill rod are integrally formed and are coaxially designed, and the diameter of the drill rod is the same as that of the tail of the drill bit.

Furthermore, the drill bit and the drill rod are provided with anti-corrosion wear-resistant coatings.

According to the technical scheme, the utility model has the beneficial effects that:

the rotary drilling bit special for pile foundation hole forming is reasonable in structural design, and due to the design of the helical blades, soil taking is efficient, and the hole forming speed is high; the triangular fixing frame is additionally welded on the drill bit, so that the verticality of the drill bit is controlled, the problem that the drill bit is prone to inclined drilling at a soft and hard soil junction is solved, and the smooth construction of engineering safety is effectively guaranteed.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of the construction of the drill bit orienting frame of the present invention;

fig. 3 is a schematic view of the installation of the present invention and a drilling tool.

Detailed Description

The utility model is further elucidated with reference to the drawings and the embodiments.

The rotary drilling bit special for pile foundation pore-forming shown in fig. 1-3 comprises a drill rod 1 and a drill bit 2, wherein a drill bit directional frame 3 is welded at a position, close to the drill bit 2, on the drill rod 1, and a helical blade 4 is arranged between the middle of the drill rod 1 and the tail position of the drill bit 2. The drill bit directional frame 3 is a tripod.

The drill bit orienting frame 3 comprises an upper fixed inner ring 31, an upper fixed outer ring 32, a transverse connecting rod 33, a lower fixed ring 34 and a longitudinal inclined connecting rod 35, wherein the lower fixed ring 34 is sleeved at the bottom end of the drill bit 2, the upper fixed inner ring 31 is sleeved at the upper end of the drill bit 2, the upper fixed outer ring 32 is arranged at the outer side of the upper fixed inner ring 31, and the upper fixed inner ring 31 and the upper fixed outer ring are connected through the transverse connecting rod 33; a longitudinally inclined connecting rod 35 is provided between the upper fixed outer ring 32 and the lower fixed ring 34.

In the embodiment, the head of the drill 2 is provided with a drill tip 21, and the angle of the drill tip 21 is 30-35 degrees.

In this embodiment, a circular through hole 22 is formed on the drill 2 near the drill tip 212-3 mm.

In the embodiment, the drill bit 1 and the drill rod 2 are integrally formed and are coaxially designed, and the diameter of the drill rod 1 is the same as that of the tail part of the drill bit 2.

In this embodiment, the drill bit 2 and the drill rod 1 are provided with an anti-corrosion wear-resistant coating.

The examples are given solely for the purpose of illustration and are not to be construed as limitations of the present invention, as various equivalents will occur to those skilled in the art upon reading the present invention and are intended to be within the scope of the utility model as defined in the claims appended hereto.

Claims

1. The utility model provides a drill bit is dug soon to dedicated pile foundation pore-forming which characterized in that: the drill rod comprises a drill rod (1) and a drill bit (2), wherein a drill bit directional frame (3) is welded at a position, close to the drill bit (2), on the drill rod (1), and a helical blade (4) is arranged between the middle of the drill rod (1) and the tail position of the drill bit (2).

2. The special rotary drilling bit for pile foundation hole forming according to claim 1, characterized in that: the drill bit directional frame (3) is a tripod.

3. The special rotary drilling bit for pile foundation hole forming according to claim 2, characterized in that: the drill bit orienting frame (3) comprises an upper fixed inner ring (31), an upper fixed outer ring (32), a transverse connecting rod (33), a lower fixed ring (34) and a longitudinal inclined connecting rod (35), wherein the lower fixed ring (34) is sleeved at the bottom end of the drill bit (2), the upper fixed inner ring (31) is sleeved at the upper end of the drill bit (2), the upper fixed outer ring (32) is arranged on the outer side of the upper fixed inner ring (31), and the upper fixed inner ring (31) and the upper fixed outer ring are connected through the transverse connecting rod (33); a longitudinally inclined connecting rod (35) is arranged between the upper fixed outer ring (32) and the lower fixed ring (34).

4. The special rotary drilling bit for pile foundation hole forming according to claim 1, characterized in that: the head of the drill bit (2) is provided with a drill tip (21), and the angle of the drill tip (21) is 30-35 degrees.

5. The special rotary drilling bit for pile foundation hole forming according to claim 4, wherein the rotary drilling bit comprises: a round through hole (22) is arranged on the drill bit (2) at a position 2-3mm close to the drill tip (21).

6. The special rotary drilling bit for pile foundation hole forming according to claim 1, characterized in that: the drill bit (2) and the drill rod (1) are integrally formed and are coaxially designed, and the diameter of the drill rod (1) is the same as that of the tail part of the drill bit (2).

7. The special rotary drilling bit for pile foundation hole forming according to claim 1, characterized in that: and the drill bit (2) and the drill rod (1) are provided with anti-corrosion wear-resistant coatings.