CN219101219U - Large-aperture pile-forming drill bit - Google Patents

Abstract

The utility model discloses a large-aperture pile-forming drill bit, wherein a plurality of strip-shaped rotating teeth are arranged on a body, slag discharging grooves for removing slag and/or broken stone are arranged between the rotating teeth, a plurality of exhaust holes are formed in the slag discharging grooves, a plurality of alloy bodies are embedded in the rotating teeth, and the rotating teeth are spirally outwards unscrewed from the center of the drill bit body. According to the large-aperture pile-forming drill bit, rock is crushed through rotation of the rotary teeth, the strip-shaped rotary teeth which are spirally outwards unscrewed from the center of the drill bit body are easier to drill downwards, meanwhile, collision resistance between the rotary teeth and the rock is reduced, broken stone and/or dregs are enabled to flow away from a dreg discharge groove, circulation of the broken stone and/or dregs is enhanced through the exhaust holes, broken stone and/or dregs blocked in the dreg discharge groove are prevented from affecting drilling speed of the drill bit, strength of the rotary teeth is increased through alloy bodies embedded in the rotary teeth, pile-forming quality of the drill bit is stable, rock-breaking speed is high, and rapid hole forming of complex stratum can be achieved.

Description

Large-aperture pile-forming drill bit

Technical Field

The utility model relates to the technical field of aperture drilling, in particular to a large-aperture pile-forming drill bit.

Background

Along with the rapid development of national economy construction, in the process of pulling the development of national economy by basic construction, drilling and piling are widely applied, wherein the drilling and piling refers to piling which is formed by forming pile holes in foundation soil through mechanical drilling on an engineering site, placing reinforcement cages in the pile holes and pouring concrete.

Due to the different geological structures, when drilling in some complex stratum, the drill bit is required to have high drilling speed, high efficiency and difficult abrasion.

In view of the above, chinese patent CN210033295U discloses a down-the-hole drill bit, which comprises a bit body and drill teeth, wherein the bit body comprises a bit and a tail handle, the bit comprises a circular truncated cone top surface perpendicular to the axis of the bit body, an inner ring conical surface and an outer ring conical surface with different inclination angles, three exhaust holes and three drill tooth insert holes are arranged on the circular truncated cone top surface, and the exhaust holes and the drill tooth insert holes are scattered along the center point and have different distances from the center point; three drilling tooth insert holes are uniformly distributed on the conical surface of the inner ring, six drilling tooth insert holes are uniformly distributed on the conical surface of the outer ring, chip grooves are formed between the two drilling tooth insert holes of the conical surface of the outer ring, drilling teeth are mounted on the drilling tooth insert holes, and the novel drilling machine has the advantages of more stable work and better chip removal effect.

However, the inner ring conical surface and the outer ring conical surface are provided with drilling tooth insert holes for mounting the drilling teeth, and the drilling teeth are in a convex shape, so that the drilling teeth are drilled in some complex stratum, and collide with rock to generate larger resistance, so that the drilling speed is low, the efficiency is low and the drilling teeth are easy to damage.

Disclosure of Invention

The utility model provides a large-aperture pile-forming drill bit which is used for solving the technical problems of difficult pile forming, low drilling speed, low efficiency and easy abrasion of the drill bit of a complex stratum.

In order to achieve the above purpose, the utility model provides a large-aperture pile-forming drill bit, wherein a plurality of rotary teeth are arranged on a drill bit body, slag discharging grooves for discharging slag and/or broken stone are arranged between the rotary teeth, a plurality of exhaust holes are arranged on the slag discharging grooves, a plurality of alloy bodies are embedded on the rotary teeth, and the rotary teeth are spirally outwards unscrewed from the center of the drill bit body.

Preferably, the number of the rotating teeth is four.

Preferably, the alloy body on each of the rotating teeth is not less than ten.

Preferably, the four rotating teeth form four slag discharging grooves.

Preferably, each slag discharging groove is specifically provided with an air discharging hole.

Preferably, all the exhaust holes are simultaneously connected with one air pipe arranged in the body.

Preferably, the body is connected with a spline, and the spline is connected with the impact hammer.

The utility model has the following beneficial effects: according to the large-aperture pile-forming drill bit, rock is crushed through rotation of the rotary teeth, the strip-shaped rotary teeth which are spirally outwards unscrewed from the center of the drill bit body are easier to drill downwards, meanwhile, collision resistance between the rotary teeth and the rock is reduced, broken stone and/or dregs are enabled to flow away from a dreg discharge groove, circulation of the broken stone and/or dregs is enhanced through the exhaust holes, broken stone and/or dregs blocked in the dreg discharge groove are prevented from affecting drilling speed of the drill bit, strength of the rotary teeth is increased through alloy bodies embedded in the rotary teeth, pile-forming quality of the drill bit is stable, rock-breaking speed is high, and rapid hole forming of complex stratum can be achieved.

In addition to the objects, features and advantages described above, the present utility model has other objects, features and advantages. The utility model will be described in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

fig. 1 is a schematic structural view of a large-bore pile-forming drill bit according to the present utility model.

Fig. 2 is a projection view of a large bore pile forming drill bit of the present utility model.

Wherein, the reference numerals are as follows:

1. a spline; 2. a slag discharge groove; 3. an exhaust hole; 4. rotating teeth; 5. an alloy body.

Detailed Description

Embodiments of the utility model are described in detail below with reference to the attached drawings, but the utility model can be implemented in a number of different ways, which are defined and covered by the claims.

Furthermore, unless defined otherwise, technical or scientific terms used in the description of this application should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The terms "upper," "lower," "left," "right," "center," "vertical," "horizontal," "inner," "outer," and the like as used in this description are merely used to indicate relative directions or positional relationships, and do not imply that a device or element must have a particular orientation, be configured and operated in a particular orientation, and that the relative positional relationships may be changed when the absolute position of the object being described is changed, and thus should not be construed as limiting the present application. The terms "first," "second," "third," and the like, as used in the description herein, are used for descriptive purposes only and are not to be construed as indicating or implying any particular importance to the various components. The use of the terms "a," "an," or "the" and similar referents in the description of the utility model are not to be construed as limited in number to the precise location of at least one. As used in this description, the terms "comprises," "comprising," or the like, are intended to cover an element or article that appears before the term and that is recited after the term and its equivalents, without excluding other elements or articles.

It should also be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and the like as used in the description of this application shall be construed broadly, e.g., the connection may be a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can also be communicated with the inside of two elements, and the specific meaning of the two elements can be understood by a person skilled in the art according to specific situations.

As shown in fig. 1 and 2, the large-aperture pile-forming drill bit of this embodiment includes a body, a plurality of rotary teeth 4 are provided on the body, slag discharging grooves 2 are provided between the rotary teeth 4, the slag discharging grooves 2 are concave downward and are used for discharging crushed stone and/or dregs, a plurality of air discharging holes 3 are provided on the slag discharging grooves 2, a plurality of alloy bodies 5 are embedded on the rotary teeth 4, and the rotary teeth 4 are spirally outwards unscrewed with the center of the drill bit body.

In this embodiment, the number of the alloy bodies 5 on each rotary tooth 4 is not less than ten, the hardness of the rotary tooth 4 is enhanced by the alloy bodies 5, the service life of the drill bit is prolonged, the drilling efficiency is improved, the rotary tooth 4 is screwed outwards in a spiral shape with the center of the drill bit body to be easier to drill downwards, and the formation resistance is reduced.

The body is further connected with the spline 1, the spline 1 is connected with the impact hammer, the drill bit body is connected with the impact hammer through the spline 1, connection is firmer, stability of the drill bit can be better kept when drilling is conducted, the alloy body 5 on the rotating teeth 4 is made of high-strength alloy, strength of the rotating teeth 4 can be increased, and service life of the drill bit is prolonged.

The large-aperture pile-forming drill bit of this embodiment specifically has four rotary teeth 4, four slag discharging grooves 2 are formed on the body by the four rotary teeth 4, and the four rotary teeth 4 interact, so that the drill bit of this embodiment can quickly form holes in complex strata, and in other embodiments, two, three, five or more rotary teeth 4 can be provided.

The width of the outermost ring of the rotary teeth 4 is 1/4 of the width of the outermost ring of the slag discharging groove 2, the ratio of the width of the outermost ring of the rotary teeth 4 to the width of the outermost ring of the slag discharging groove 2 is different according to the number of the rotary teeth 4, the four rotary teeth 4 can provide larger impact force for a drill bit, and meanwhile, the wider slag discharging groove 2 can better discharge broken stones and/or soil.

In other embodiments, in order to have better exhaust, the air supply device can be connected through four air pipes in the drill body to four exhaust holes 3, and when the drill bit drills, the exhaust holes 3 exhaust and blow away broken stone and/or dregs in the slag discharge groove 2, so that the broken stone and/or dregs accumulated in the slag discharge groove 2 are prevented from affecting the drilling speed of the drill bit.

The working principle of the embodiment is as follows: in the large-aperture pile-forming drill bit of the embodiment, the impact hammer drives the drill bit body to rotate through the spline 1 and applies impact force to the drill bit body, the rotary teeth 4 on the drill bit body crush rocks and divide soil, the residue soil of the crushed rocks flows away from the slag discharge groove 2, the exhaust hole 3 keeps the slag discharge groove 2 clean, and broken stones and/or residue soil are prevented from being accumulated on the slag discharge groove 2.

The large-aperture pile-forming drill bit of the embodiment is characterized in that rock is crushed and soil is divided by rotating the rotating teeth 4, broken stone and/or dregs flow away from the dreg discharge groove 2, the circulation of the broken stone and/or dregs is enhanced through the air exhaust holes 3, the phenomenon that the broken stone and/or dregs are clamped in the dreg discharge groove 2 to influence the drilling speed of the drill bit is avoided, the strength of the rotating teeth 4 is increased by embedding the alloy body 5 on the rotating teeth 4, the drill bit has the advantages of stable pile-forming quality and high rock breaking speed, and quick hole forming of complex stratum can be realized.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (7)

1. The utility model provides a large aperture piling drill bit, its characterized in that includes the body, be equipped with a plurality of banding commentaries on classics tooth (4) on the body, be used for getting rid of dregs and/or rubble sediment groove (2) between commentaries on classics tooth (4), be equipped with a plurality of exhaust hole (3) on sediment groove (2), it has a plurality of alloy body (5) to inlay on commentaries on classics tooth (4), it tooth (4) are the spiral outside with the center of drill bit body and unscrew.

2. A large bore piling drill bit according to claim 1, characterized in that the turning teeth (4) are in particular four.

3. A large bore piling drill bit according to claim 1, characterized in that the alloy body (5) on each of the turning teeth (4) is not less than ten.

4. A large aperture piling drill bit according to claim 3, characterized in that four of the turning teeth (4) are conformal to four of the slag discharge slots (2).

5. A large aperture piling drill bit according to claim 4, characterized in that each slag discharge slot (2) is provided with a vent hole (3).

6. A large bore piling drill bit according to claim 4, characterized in that all of the exhaust holes (3) are simultaneously connected to a gas pipe provided in the body.

7. A large bore piling drill bit according to claim 1, characterized in that the body is connected with splines (1), the splines (1) being connected with an impact hammer.

Images