阅读说明：本技术 一种气液动冲击钻头 (Pneumatic-hydraulic percussion drill bit ) 是由 李天北 康俊芬 李波 于 2020-05-27 设计创作，主要内容包括：本发明提供了一种气液动冲击钻头,包括钻头本体,所述钻头本体的冲击端包裹有若干冲击齿；每个所述冲击齿的前端均超出所述冲击端的端面；所述钻头本体包裹每个所述冲击齿的后端；所述冲击齿采用硬合金金属；所述钻头本体采用软金属；所述软金属的硬度能够使所述钻头本体不断磨损,露出所述冲击齿的原包裹的部分,使所述冲击齿的原包裹的部分成为有效工作部分；所述钻头本体内部设置有多个进气通道；每个所述进气通道的出口均延伸至所述冲击端的端面。采用硬合金金属镶嵌入软金属,硬金属面始终保有凸起,且其硬金属齿长度数倍于常规钻头,使用寿命为常规钻头的数倍。(The invention provides a pneumatic-hydraulic impact drill bit which comprises a drill bit body, wherein an impact end of the drill bit body is wrapped with a plurality of impact teeth; the front end of each impact tooth exceeds the end surface of the impact end; the drill bit body wraps the rear end of each impact tooth; the impact teeth are made of hard alloy metal; the drill bit body is made of soft metal; the hardness of the soft metal can enable the drill bit body to be continuously abraded, the originally wrapped part of the impact tooth is exposed, and the originally wrapped part of the impact tooth becomes an effective working part; a plurality of air inlet channels are arranged in the drill bit body; the outlet of each of the intake passages extends to the end face of the impingement end. The hard alloy metal is embedded into the soft metal, the hard metal surface is always provided with the protrusions, the length of the hard metal tooth is several times that of a conventional drill bit, and the service life of the hard metal tooth is several times that of the conventional drill bit.)

1. The pneumatic-hydraulic percussion drill bit is characterized by comprising a drill bit body, wherein a plurality of percussion teeth are embedded in the percussion end of the drill bit body;

the front end of each impact tooth exceeds the end surface of the impact end;

the drill bit body wraps the rear end of each impact tooth;

the impact teeth are made of hard alloy metal;

the drill bit body is made of soft metal;

the hardness of the soft metal can enable the drill bit body to be continuously abraded, the originally wrapped part of the impact tooth is exposed, and the originally wrapped part of the impact tooth becomes an effective working part; a plurality of air inlet channels are arranged in the drill bit body;

the outlet of each air inlet channel extends to the end surface of the impact end;

a plurality of slag discharge grooves are formed in the circumferential side wall of the impact end;

the outlet of each slag discharge groove extends to the end surface of the impact end.

2. An air-hydraulic percussive drill bit according to claim 1,

the impact teeth are in a columnar bar shape.

3. The pneumatic-hydraulic percussive drill bit according to claim 1, wherein the impact end of the bit body is further wrapped with a plurality of primary side impact teeth;

the main side impact teeth are distributed on two sides of an outlet of each slag discharge groove;

each primary side impact tooth extends beyond the end face of the impact end;

the main side impact tooth is made of hard alloy metal.

4. A pneumatic and hydraulic percussive drill bit according to claim 3, characterised in that the primary side percussive teeth are in the shape of a cylinder.

5. The pneumatic-hydraulic percussion drill bit according to claim 1, wherein the percussion end of the bit body is further wrapped with a plurality of secondary percussion teeth;

the secondary side impact teeth are distributed between every two slag discharge grooves;

each secondary side impact tooth exceeds the end surface of the impact end;

the secondary side impact teeth are made of hard alloy metal.

6. The pneumatic percussion drill bit according to claim 5, wherein the secondary side percussive teeth are in the form of a cylindrical bar.

7. An air-hydraulic percussive drill bit according to claim 1,

a plurality of cavities are arranged in the drill bit body.

Technical Field

The invention relates to a drill bit, in particular to a pneumatic-hydraulic percussion drill bit.

Background

A common drill bit drills a stratum, normally exposed fixed teeth are usually adopted, ultra-long teeth are difficult to achieve, the teeth are extremely easy to break if the teeth are too long, the abrasion speed is high, the rock breaking efficiency of the drill bit is reduced rapidly, the rock breaking efficiency of the drill bit is low, the service life is short, and the drill bit needs to be replaced frequently. And when a single drill bit form faces a complex and difficult-to-drill stratum, the impact end of the drill bit is in large-area contact with the stratum, so that the drill bit is difficult to replace in time, and the drilling efficiency of the drill bit is greatly limited.

Disclosure of Invention

The invention aims to provide a pneumatic-hydraulic percussion drill bit which is convenient to control cost, high in drilling efficiency and long in service life.

In order to solve the technical problem, the pneumatic-hydraulic impact drill bit comprises a drill bit body, wherein the impact end of the drill bit body is wrapped with a plurality of impact teeth.

Each of the impact teeth extends beyond an end surface of the impact end.

The bit body wraps the rear end of each of the impact teeth.

The impact teeth are made of hard alloy metal.

The drill bit body is made of soft metal.

The hardness of the soft metal can enable the drill bit body to be continuously abraded, the originally wrapped part of the impact tooth is exposed, and the originally wrapped part of the impact tooth becomes an effective working part.

A plurality of air inlet channels are arranged in the drill bit body.

The outlet of each of the intake passages extends to the end face of the impingement end.

And the circumferential side wall of the impact end is provided with a plurality of slag discharge grooves.

The outlet of each slag discharge groove extends to the end surface of the impact end.

The impact teeth are in a columnar bar shape.

The impact end of the drill bit body is further wrapped with a plurality of main side impact teeth.

The main side impact teeth are distributed on two sides of an outlet of each slag discharge groove.

Each of the primary side impact teeth extends beyond an end surface of the impact end.

The main side impact tooth is made of hard alloy metal.

The main side impact teeth are in a columnar bar shape.

The impact end of the drill bit body is further wrapped with a plurality of auxiliary side impact teeth.

And the secondary side impact teeth are distributed between every two slag discharge grooves.

Each secondary side impact tooth extends beyond the end face of the impact end.

The secondary side impact teeth are made of hard alloy metal.

The secondary side impact teeth are in a columnar bar shape.

A plurality of cavities are arranged in the drill bit body.

Compared with the prior art, the invention has the following beneficial effects: (1) the hard metal is embedded into the soft metal, so that the soft metal is worn too fast in the impact wear process, the hard metal has high wear resistance, and the hard metal surface always keeps a bulge, so that the hard metal always keeps an impact effect when the operation surface impacts, the hard metal teeth are deeply embedded into the soft metal, the length of the hard metal teeth is multiple times that of a conventional drill bit, and the service life of the hard metal teeth is multiple times that of the conventional drill bit;

(2) the soft metal has higher abrasion speed than the hard metal, and because the impact teeth made of the hard alloy metal are embedded in the drill bit body made of the soft metal and exceed the front end of the drill bit body, the surface of the drill bit contacting with the rock can be kept uneven all the time during drilling, the rock is landed on the convex surface during rotary impact, the impact pressure is high, and the drilling efficiency is high;

(3) the slag chips are discharged in time through the slag discharge groove, and do not need to be cleaned independently, thereby being beneficial to improving the drilling efficiency.

Drawings

The pneumatic and hydraulic impact drill of the present invention will be described in further detail with reference to the accompanying drawings and embodiments.

FIG. 1 is a schematic view of the end face structure of the impact end of the pneumatic-hydraulic impact drill bit of the present invention.

FIG. 2 is a schematic diagram of a side view of the pneumatic percussion drill bit according to the present invention.

In the figure: 1-a drill bit body; 101-impact teeth; 102-primary side impact teeth; 103-secondary side impact teeth; 104-an intake passage; 105-slag discharge groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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 invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

One embodiment of the present invention is shown in fig. 1 to 2, and the embodiment provides a pneumatic-hydraulic impact drill bit, which includes a drill bit body 1, wherein an impact end of the drill bit body 1 is wrapped with a plurality of impact teeth 101.

The front end of each of the impact teeth 101 extends beyond the end surface of the impact end.

The bit body 1 wraps the rear end of each of the impact teeth 101.

The impact teeth 101 are made of hard alloy metal.

The drill bit body 1 is made of soft metal.

The hardness of the soft metal can enable the drill bit body 1 to be continuously worn, expose the originally wrapped part of the impact tooth 101, and enable the originally wrapped part of the impact tooth 101 to become an effective working part.

A plurality of air inlet channels 104 are arranged inside the drill bit body 1.

The outlet of each of the intake passages 104 extends to the end face of the impingement end.

The circumferential side wall of the impact end is provided with a plurality of slag discharge grooves 105.

The outlet of each slag discharge groove 105 extends to the end face of the impact end.

The impact teeth 101 are in the shape of a bar.

The impact end of the bit body 1 is further wrapped with a plurality of primary side impact teeth 102.

The primary side impact teeth 102 are distributed on both sides of the outlet of each slag discharge groove 105.

Each of the primary side impact teeth 102 extends beyond the end face of the impact end.

The primary side impact teeth 102 are of a hard alloy metal.

The primary side impact teeth 102 are in the form of bars.

The impact end of the drill bit body 1 is further wrapped with a plurality of secondary side impact teeth 103.

The secondary side impact teeth 103 are distributed between every two slag discharge grooves 105.

Each of the secondary side impact teeth 103 extends beyond the end face of the impact end.

The secondary side impact teeth 103 are made of hard alloy metal.

The secondary side impact teeth 103 are in the shape of a cylindrical bar.

A plurality of cavities are arranged inside the drill bit body 1.

The driving end of the drill bit body 1 is installed on the impactor, the impactor and the plurality of air inlet channels 104 form a closed loop, when hydraulic oil is used as a power medium of the impactor, air or water and slurry are required to be additionally added to serve as a chip carrying medium, slag chips are discharged through the slag discharging groove 105, when the water or slurry is used as the power medium of the impactor, other loops do not need to be added, and the water or slurry after doing work can directly carry out the rock chips.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.