CN217055006U

CN217055006U - Drill bit of impactor

Info

Publication number: CN217055006U
Application number: CN202123268368.0U
Authority: CN
Inventors: 杨日平; 杨小胜; 杨湘龙
Original assignee: Changsha Heijingang Industrial Co Ltd
Current assignee: Changsha Heijingang Industrial Co Ltd
Priority date: 2021-12-22
Filing date: 2021-12-22
Publication date: 2022-07-26
Anticipated expiration: 2031-12-22

Abstract

The application discloses impacter drill bit includes: a drill bit body; the top surface of the circular truncated cone is perpendicular to the axis of the drill bit body, and the inner installation conical surface and the outer installation conical surface are different in inclination angle; an alloy tooth assembly disposed on the working end face of the bit body; the drill bit comprises a drill bit body, a guide structure arranged on the outer circumferential surface of the drill bit body, and the outer diameter of the guide structure is equal to the aperture of a hole to be drilled. The application provides an impacter drill bit compares in prior art, can improve the straightness accuracy of the hole of boring, reduces the drill bit card and bores the risk.

Description

Drill bit of impactor

Technical Field

The application relates to the technical field of drilling equipment, in particular to a drill bit of an impactor.

Background

With the development of industry, various infrastructure projects are continuously promoted. The down-the-hole hammer is widely used as drilling equipment in blasting projects in engineering construction of mines, hydropower stations, ports, roads, tunnels and the like, and is used for excavating blasting drill holes and the like. The down-the-hole hammer provides high-pressure water or compressed air into the hammer through a compressor, a piston in the hammer is driven to reciprocate at high speed, the piston reciprocates to strike a drill bit once and again, and rock breaking is achieved through alloy teeth at the front end of the drill bit.

However, during the use process, the deviation of the straightness of the hole is finally caused by the deflection generated by the instability of the rock stratum during the rock drilling process of the drill bit, the deeper the drilled hole is, the larger the deviation is, and if the deviation of the straightness is too large, the drill sticking of the impactor can be finally caused, and the straightness of the drilled hole does not meet the use requirement.

Therefore, there is a need for a drill bit of a percussion apparatus, which can improve the straightness of the drilled hole and reduce the risk of drill jamming.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the application provides an impacter drill bit, can improve the straightness accuracy in the hole that bores, reduces the drill bit sticking risk.

The technical scheme provided by the application is as follows:

an impactor drill bit comprising: a drill bit body;

the top surface of the circular truncated cone is perpendicular to the axis of the drill bit body, and the inner installation conical surface and the outer installation conical surface are different in inclination angle;

an alloy tooth assembly disposed on the working end face of the bit body;

the guide structure is arranged on the outer circumferential surface of the drill bit body, and the outer diameter of the guide structure is smaller than the aperture of the hole to be drilled.

Preferably, the alloy tooth assembly comprises:

the first alloy teeth are arranged on the top surface of the circular truncated cone; the second alloy tooth is arranged on the inner installation conical surface; a third alloy tooth disposed on the outer mounting cone;

the number of the third alloy teeth is larger than that of the second alloy teeth, and the number of the second alloy teeth is larger than that of the first alloy teeth.

Preferably, the method further comprises the following steps:

and the outer wall working surface is arranged on the outer circumference of the outer mounting conical surface and has an angle inclined towards the axial direction of the drill bit body, so that the third alloy teeth are in contact with the hole wall.

Preferably, the first and second electrodes are formed of a metal,

the inclination angle between the outer mounting conical surface and the circular truncated cone top surface is 30-36 degrees, the radial length of the outer wall working surface is 30-40 mm, and the inclination angle of the outer wall working surface to the axis direction is 4-6 degrees.

Preferably, the first and second electrodes are formed of a metal,

the inclination angle between the outer installation conical surface and the top surface of the circular truncated cone is 40-45 degrees, the axial length of the outer wall working surface is 20-25 mm, and the inclination angle of the outer wall working surface to the axial direction is 10-12 degrees.

Preferably, the first and second liquid crystal display panels are,

the first alloy tooth is provided with 3, the second alloy tooth is provided with 4 just second alloy tooth evenly distributed is in on the interior installation conical surface, the third alloy tooth is provided with 8 just third alloy tooth evenly distributed is in on the outer installation conical surface.

Preferably, the method further comprises the following steps:

the air outlet is arranged on the top surface of the circular truncated cone and is communicated with the air passage;

the slag discharge ports are uniformly distributed on the working surface of the outer wall;

and the blowing channel is communicated with the air outlet and the slag discharge port.

Preferably, the guide structure includes:

the guide ribs are provided with a plurality of groups and are uniformly distributed on the outer circumferential surface of the drill bit body;

and the slag discharge channel is arranged between the adjacent guide ribs.

The utility model provides an impacter drill bit, at first owing to be provided with drill bit body and guide structure thereof, wherein, guide structure sets up on the outer periphery of drill bit body, and guide structure's external diameter is less than the aperture of waiting to drill, owing to set up guide structure, prevent that drill bit drilling process from producing the beat because the unstability of stratum can produce, finally cause the hole straightness accuracy to produce the skew, guide structure's external diameter size is less than the aperture of waiting to drill, prevent that the clearance is too little between guide assembly and the pore wall from making the impacter block and can not work; secondly, owing to be provided with round platform top surface, interior installation conical surface and outer installation conical surface, wherein round platform top surface, interior installation conical surface and outer installation conical surface set up the work terminal surface at the drill bit body, and the axis setting of perpendicular to drill bit body, and interior installation conical surface and outer installation conical surface are different inclination and install, are provided with the alloy tooth subassembly on drill bit body work terminal surface, because the hardness of alloy tooth subassembly is great, realize broken rock through the alloy tooth subassembly, and efficiency is higher. Therefore, compared with the prior art, the embodiment of the utility model provides an in the impacter drill bit, can improve the straightness accuracy of the hole of boring, reduce the drill bit and block brill risk.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a cross-sectional view of an impactor bit according to an embodiment of the invention;

fig. 2 is a left side view of an impactor bit provided in accordance with an embodiment of the present invention;

fig. 3 is another left side view of an impactor bit provided by an embodiment of the invention;

fig. 4 is a perspective view of a drill bit of the percussion mechanism according to an embodiment of the present invention.

Reference numerals: 1. a drill bit body; 2. an alloy tooth assembly; 3. a guide structure; 4. an airway; 5. an air outlet; 6. a slag discharge port; 7. an air blowing channel; 8. a hole wall; 11. a top surface of the circular truncated cone; 12. a conical surface is arranged in the inner part; 13. a conical surface is arranged outside; 14. an outer wall working face; 21. a first alloy tooth; 22. a second alloy tooth; 23. a third alloy tooth; 31. a guide rib; 32. a slag discharge channel.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It will be understood that when an element is referred to as being "fixed" or "disposed" to another element, it can be directly on the other element or be indirectly disposed on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, refer to an orientation or positional relationship illustrated in the drawings for convenience in describing the present application and to simplify description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "plurality" or "a plurality" means two or more unless specifically limited otherwise.

It should be understood that the structures, ratios, sizes, and the like shown in the drawings are only used for matching the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present application can be implemented, so that the present application has no technical significance.

The embodiment of the utility model provides an adopt the mode of going forward to write.

As shown in fig. 1 to 4, an embodiment of the present invention provides a drill bit of an impactor, including: a drill body 1; the cone top surface 11 is arranged on the working end surface of the drill bit body 1 and is vertical to the axis of the drill bit body 1, and the inner installation conical surface 12 and the outer installation conical surface 13 are different in inclination angle; an alloy tooth assembly 2 arranged on the working end surface of the drill bit body 1; the drill bit comprises a guide structure 3 arranged on the outer circumferential surface of the drill bit body 1, wherein the outer diameter of the guide structure 3 is smaller than the aperture to be drilled.

In the drill bit of the impactor in the prior art, because the guide structure 3 is not arranged, the drill bit generates deflection due to instability of a rock stratum in a rock drilling process in a using process, and finally the hole straightness deflects, the deeper the drilled hole is, the larger the deflection is, and finally the drill bit of the impactor cannot be operated and the straightness of the drilled hole does not meet the use requirement if the straightness deflection is overlarge.

The utility model provides an impacter drill bit, at first owing to be provided with drill bit body 1 and guide structure 3 thereof, wherein, guide structure 3 sets up on the outer periphery of drill bit body 1, and the external diameter of guide structure 3 is less than the aperture of waiting to drill, owing to set up guide structure 3, prevent that the drill bit drilling process from producing the beat because the unstability of stratum can produce, finally cause the hole straightness accuracy to produce the skew, the external diameter size of guide structure 3 is less than the aperture of waiting to drill, prevent that the clearance is too little between guide assembly and the pore wall from making the impacter block and can not work; secondly, owing to be provided with round platform top surface 11, interior installation conical surface 12 and outer installation conical surface 13, wherein round platform top surface 11, interior installation conical surface 12 and outer installation conical surface 13 set up at the work terminal surface of drill bit body 1, and the axis setting of perpendicular to drill bit body 1, interior installation conical surface 12 and outer installation conical surface 13 are different inclination and install, be provided with alloy tooth subassembly 2 on drill bit body 1 work terminal surface, because alloy tooth subassembly 2's hardness is great, realize rock breaking through alloy tooth subassembly 2, high efficiency. Therefore, compare with prior art, the embodiment of the utility model provides an in the impacter drill bit can improve the straightness accuracy of the hole of boring, reduce the drill bit and block brill risk.

In the above structure, the alloy tooth assembly 2 in the embodiment of the present invention includes the first alloy tooth 21, the second alloy tooth 22 and the third alloy tooth 23, wherein the first alloy tooth 21 is disposed on the circular truncated cone top surface 11, the second alloy tooth 22 is disposed on the inner installation conical surface 12, the third alloy tooth 23 is disposed on the outer installation conical surface 13, because the linear velocity of the outermost ring on the working end surface of the drill body 1 is larger, the wear of the alloy teeth is faster, because the wear rate of each alloy tooth on the working end surface is the same, the number of the third alloy teeth 23 in the embodiment of the present invention is greater than the number of the second alloy teeth 22, and the number of the second alloy teeth 22 is greater than the number of the first alloy teeth 21.

In the above structure, as a more preferable implementation manner, the drill bit of the embodiment of the present invention further includes an outer wall working surface 14, the outer wall working surface 14 is disposed on the outer circumferential surface of the outer mounting conical surface 13, and the outer wall working surface 14 has an angle inclined toward the axial direction of the drill bit body 1. In the in-process of using, third alloy tooth 23 sets up on outer installation conical surface 13, because the hardness of alloy tooth is greater than drill bit body 1's hardness, in order to prevent drill bit body 1 wearing and tearing excessively fast, the embodiment of the utility model provides an outer wall working face 14 has the angle towards drill bit body 1's axis direction slope for in-process using, third alloy tooth 23 and pore wall contact, under the effect of impact force and rotational torque, third alloy tooth 23 breaks the stratum by force.

In the structure, due to the fact that the actual conditions of the construction site are different, the hardness of the rock to be drilled is different, and under many conditions, an interlayer is further arranged in the rock. The linear velocity of the third alloy tooth 23 is fastest during drilling, after the third alloy tooth 23 is worn, the outer wall working surface 14 begins to rub with the hole wall, after the outer wall working surface 14 is worn partially, the third alloy tooth 23 is easily broken off or falls out of the drill bit body 1 when bearing impact force, the alloy separated from the drill bit can reversely form resistance to the drill bit, and becomes an individual which is extremely difficult to break, so that impact between the first alloy tooth 21 and the second alloy tooth 22 and the separated third alloy tooth 23 is formed.

In order to make the drill bit be applicable to the stratum of different hardness, the embodiment of the utility model provides a two kinds of drill bits have been proposed, to the lower stratum of hardness, the embodiment of the utility model provides an in the impacter drill bit inclination A between outer installation conical surface 13 and the round platform top surface 11 be 30 to 36, the radial length B of outer wall working face 14 is 30mm to 40mm, the angle C of outer wall working face 14 to the slope of axis direction is 4 to 6. In the prior art, the inclination angle between the outer installation conical surface 13 and the circular truncated cone top surface 11 is 38 degrees, the radial length of the outer wall working surface 14 is 26mm to 29mm, and the inclination angle of the outer wall working surface 14 towards the axis direction is 8 degrees.

Compared with the impactor bit in the prior art, for the rock stratum with lower hardness such as conglomerate, the abrasion of the alloy tooth assembly 2 is slower, the abrasion of the bit body 1 is faster, the amount of the third alloy teeth 23 exposed out of the bit body 1 is reduced by reducing the inclination angle A between the outer mounting conical surface 13 and the circular truncated cone top surface 11, the abrasion rate of the third alloy teeth 23 and the abrasion rate of the bit body 1 are kept relatively balanced, further, the inclination angle C of the outer wall working surface 14 towards the axial direction is reduced, the radial length B of the outer wall working surface 14 is increased, the contact area between the outer wall working surface 14 and the rock stratum is further increased, meanwhile, the outer wall working surface 14 is hardened, the strength of the outer wall working surface 14 is further enhanced, and the outer wall working surface 14 is more wear-resistant.

To the higher stratum of hardness, the embodiment of the utility model provides an in the impacter drill bit inclination A between outer installation conical surface 13 and the round platform top surface 11 be 40 to 45, the radial length B of outer wall working face 14 is 20mm to 25mm, the angle C of outer wall working face 14 to the slope of axis direction is 10 to 12. In the prior art, the inclination angle between the outer installation conical surface 13 and the circular truncated cone top surface 11 is 38 degrees, the radial length of the outer wall working surface 14 is 26mm to 29mm, and the inclination angle of the outer wall working surface 14 towards the axis direction is 8 degrees.

Compare with the impacter drill bit among the prior art, to the higher stratum of hardness such as granite, the wearing and tearing of alloy tooth subassembly 2 are very fast, and the wearing and tearing speed of in order to make alloy tooth subassembly 2 equals with drill bit body 1's wearing and tearing speed, the embodiment of the utility model provides an impacter drill bit is through the inclination A between the outer installation conical surface 13 of increase and the round platform top surface 11 for the volume on third alloy tooth 23 exposes drill bit body 1 increases, and further, increases the angle C of outer wall working face 14 to the slope of axis direction, reduces the radial length B of outer wall working face 14, reduces the contact wear between outer wall working face 14 and the stratum.

In the above structure, as a more preferable embodiment, the number of the first alloy teeth 21 in the embodiment of the present invention is 3, the number of the second alloy teeth 22 is 4, and the second alloy teeth 22 are uniformly distributed on the inner mounting conical surface 12, and the number of the third alloy teeth 23 is 8, and the third alloy teeth 23 are uniformly distributed on the outer mounting conical surface 13. Since the linear velocity of the third tooth 23 is at its maximum, it wears more quickly in use. As a more preferable embodiment, for a rock formation having a high hardness, the number of the third alloy teeth 23 is increased, and the wear resistance of the third alloy teeth 23 is increased.

Above two kinds of impacter drill bits, to the rock stratum of different hardness, through the inclination that changes outer installation conical surface 13, the inclination and the radial length of outer wall working face 14 for the wear rate of alloy tooth subassembly 2 equals with the wear rate of drill bit body 1, makes the life of impacter drill bit bigger.

In the above-described structure, as a more preferable embodiment, the drill bit of the present invention further includes: gas outlet 5, slag discharging port 6 and gas blowing channel 7, wherein gas outlet 5 sets up on round platform top surface 11, and gas outlet 5 and air flue 4 intercommunication, and slag discharging port 6 sets up on outer wall working face 14, and evenly sets up around the circumference of the axis of drill bit body 1, and gas blowing channel 7 is used for intercommunication gas outlet 5 and slag discharging port 6, and the high-pressure gas in the air flue 4 flows out from gas outlet 5, and pushes away the residue to slag discharging port 6 through gas blowing channel 7.

In the structure, as a more preferred embodiment, the embodiment of the utility model provides a guide structure 3 includes direction muscle 31 and slag discharging channel 32, and wherein, direction muscle 31 is provided with the multiunit, and direction muscle 31 evenly distributed is on the outer periphery of drill bit body 1, and slag discharging channel 32 sets up between adjacent direction muscle 31, gets rid of the residue of 6 departments of slag discharging port through slag discharging channel 32 to avoid the residue to remain and strengthen the degree of difficulty of drilling in the hole.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An impactor bit, comprising: a drill body (1);

the circular truncated cone top surface (11) is arranged on the working end surface of the drill bit body (1) and is vertical to the axis of the drill bit body (1), and the inner installation conical surface (12) and the outer installation conical surface (13) are different in inclination angle;

the alloy tooth assembly (2) is arranged on the working end face of the drill bit body (1);

the drill bit comprises a guide structure (3) arranged on the outer circumferential surface of the drill bit body (1), wherein the outer diameter of the guide structure (3) is smaller than the hole diameter to be drilled.

2. The impactor bit according to claim 1,

the alloy tooth assembly (2) comprises:

a first alloy tooth (21) arranged on the circular truncated cone top surface (11); a second alloy tooth (22) disposed on the inner mounting taper (12); a third alloy tooth (23) provided on the outer mounting taper (13);

the number of the third alloy teeth (23) is larger than that of the second alloy teeth (22), and the number of the second alloy teeth (22) is larger than that of the first alloy teeth (21).

3. The impactor bit according to claim 2,

further comprising:

an outer wall working face (14) provided on an outer circumference of the outer mounting tapered face (13), the outer wall working face (14) having an angle inclined toward an axial direction of the bit body (1) such that the third alloy tooth (23) is in contact with a hole wall.

4. The impactor bit according to claim 3,

the inclination angle between the outer mounting conical surface (13) and the circular truncated cone top surface (11) is 30-36 degrees, the radial length of the outer wall working surface (14) is 30-40 mm, and the inclination angle of the outer wall working surface (14) towards the axis direction is 4-6 degrees.

5. The impactor bit according to claim 3,

the inclination angle between the outer installation conical surface (13) and the circular truncated cone top surface (11) is 40-45 degrees, the axial length of the outer wall working surface (14) is 20-25 mm, and the inclination angle of the outer wall working surface (14) to the axial direction is 10-12 degrees.

6. The impactor bit according to claim 5,

the number of the first alloy teeth (21) is 3, the number of the second alloy teeth (22) is 4, the second alloy teeth (22) are uniformly distributed on the inner installation conical surface (12), and the number of the third alloy teeth (23) is 8, and the third alloy teeth (23) are uniformly distributed on the outer installation conical surface (13).

7. The impactor bit according to any one of claims 3 to 6,

further comprising:

the air outlet (5) is arranged on the top surface (11) of the circular truncated cone and is communicated with the air passage (4);

the slag discharge openings (6) are uniformly distributed on the outer wall working surface (14);

and the blowing channel (7) is communicated with the air outlet (5) and the slag discharge port (6).

8. The percussive drill bit according to any one of claims 1 to 6,

the guide structure (3) comprises:

the drill bit comprises a drill bit body (1), wherein a plurality of groups of guide ribs (31) are arranged, and the guide ribs (31) are uniformly distributed on the outer circumferential surface of the drill bit body (1);

and the slag discharge channel (32) is arranged between the adjacent guide ribs (31).