阅读说明：本技术 一种气液动组合冲击钻头 (Pneumatic-hydraulic combined 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组合冲击钻头,包括主钻头和副钻头；所述气液动组合冲击钻头的横截面呈矩形；所述主钻头的驱动端和所述副钻头的驱动端套均设在支架上；所述主钻头的横截面呈圆形；所述主钻头的冲击端嵌设有若干冲击齿；每个所述冲击齿均超出所述主钻头的冲击端的端面；所述冲击齿采用硬合金金属；所述主钻头的本体采用软金属；所述主钻头的冲击端超出所述副钻头的冲击端的端面；所述副钻头采用硬合金金属。其开挖面可呈矩形,提供了更多开挖面的形状,有利于大面积钻孔。(The invention provides a pneumatic-hydraulic combined percussion drill bit, which comprises a main drill bit and an auxiliary drill bit, wherein the main drill bit is a drill bit; the cross section of the pneumatic-hydraulic combined percussion drill bit is rectangular; the driving end of the main drill bit and the driving end of the auxiliary drill bit are sleeved on the bracket; the cross section of the main drill bit is circular; a plurality of impact teeth are embedded in the impact end of the main drill bit; each impact tooth exceeds the end surface of the impact end of the main drill bit; the impact teeth are made of hard alloy metal; the main body of the main drill bit is made of soft metal; the impact end of the main drill exceeds the end surface of the impact end of the auxiliary drill; the auxiliary drill bit is made of hard alloy metal. The excavation surface can be rectangular, so that more excavation surfaces are provided, and large-area drilling is facilitated.)

1. A pneumatic-hydraulic combined percussion drill bit is characterized by comprising a main drill bit and an auxiliary drill bit;

the driving end of the main drill bit and the driving end of the auxiliary drill bit are sleeved on the bracket;

the cross section of the main drill bit is circular;

a plurality of impact teeth are embedded in the impact end of the main drill bit;

each impact tooth exceeds the end surface of the impact end of the main drill bit;

the impact teeth are made of hard alloy metal;

the main body of the main drill bit is made of soft metal;

the impact end of the main drill exceeds the end surface of the impact end of the auxiliary drill;

the auxiliary drill bit is made of hard alloy metal;

the secondary drill bit is disposed around the primary drill bit;

the cross section of the pneumatic-hydraulic combined percussion drill bit is rectangular.

2. A combined pneumatic and hydraulic percussive drill bit according to claim 1,

a plurality of main air inlet channels are arranged in the main body of the main drill bit;

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

each main air inlet channel extends to the end face of the driving end of the main drill bit after the driving ends of the main drill bits are converged;

a plurality of auxiliary air inlet channels are arranged in the main body of the auxiliary drill bit;

the front end of each auxiliary air inlet channel extends to the end surface of the impact end of the auxiliary drill bit;

each auxiliary air inlet channel is a superfine hole, and the diameter of each auxiliary air inlet channel is not more than 20 mm;

the rear end of each auxiliary air inlet channel is converged with a ventilation cavity;

the vent cavity is located inside the body of the secondary drill bit;

the rear end of the ventilation cavity is connected with the exhaust passage.

3. A combined pneumatic and hydraulic percussive drill bit according to claim 1,

a plurality of main slag discharge grooves are formed in the circumferential side wall of the main drill bit;

each main slag discharge groove extends from the end face of the driving end of the main drill bit to the end face of the impact end of the main drill bit;

the side wall of the auxiliary drill bit is provided with a plurality of convex blocks;

and a gap between each two lugs forms an auxiliary slag discharge groove.

4. A combined pneumatic and hydraulic percussive drill bit according to claim 1,

a main through hole is formed in the center of the support;

the main through hole is circular;

the bracket is provided with a plurality of auxiliary through holes around the main through hole;

the main drill bit moves back and forth or rotates relatively in the main through hole;

the auxiliary drill bits are provided in plurality;

each of the sub drill bits moves back and forth in each of the sub through holes, respectively.

5. A combined pneumatic and hydraulic percussive drill bit according to claim 1,

the impact teeth are in a columnar bar shape.

6. A pneumatic and hydraulic combination percussion drill bit according to claim 3, wherein the percussion end of the main drill bit is further embedded with a plurality of primary side percussion teeth;

the main side impact teeth are distributed on two sides of an outlet of each main slag discharging 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.

7. A combined pneumatic and hydraulic percussive drill bit according to claim 6, characterised in that the primary side percussive teeth are in the shape of a cylinder.

8. The pneumatic-hydraulic combined impact drill bit as claimed in claim 3, wherein a plurality of secondary side impact teeth are embedded in the impact end of the drill bit body;

the secondary side impact teeth are distributed between every two main 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.

9. The pneumatic-hydraulic combination percussion drill bit according to claim 8, wherein the secondary-side percussive teeth are in the form of a cylindrical bar.

10. A combined pneumatic and hydraulic percussive drill bit according to claim 1,

a plurality of cavities are arranged inside the main drill body.

Technical Field

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

Background

The common drill bit drills the stratum, the excavation surface of the common drill bit is generally circular, and therefore the shape of the excavation surface is limited, large-area drilling is not facilitated, and industrial application is inconvenient.

Disclosure of Invention

The invention aims to solve the technical problem of providing a pneumatic-hydraulic combined percussion drill bit, wherein the excavation surface of the pneumatic-hydraulic combined percussion drill bit can be rectangular, more excavation surface shapes are provided, and large-area drilling is facilitated.

In order to solve the technical problem, the pneumatic-hydraulic combined percussion drill bit comprises a main drill bit and an auxiliary drill bit.

The driving end of the main drill bit and the driving end of the auxiliary drill bit are sleeved on the support.

The cross section of the main drill bit is circular.

And a plurality of impact teeth are embedded at the impact end of the main drill bit.

Each of the impact teeth extends beyond an end face of the impact end of the main bit.

The impact teeth are made of hard alloy metal.

The main body of the main drill bit is made of soft metal.

The impact end of the main drill exceeds the end surface of the impact end of the auxiliary drill.

The auxiliary drill bit is made of hard alloy metal;

the secondary drill bit is disposed around the primary drill bit;

the cross section of the pneumatic-hydraulic combined percussion drill bit is rectangular.

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

The outlet of each main air inlet channel extends to the end face of the impact end of the main drill bit.

Each main air inlet channel extends to the end face of the driving end of the main drill bit after the driving ends of the main drill bits are converged.

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

The front end of each auxiliary air inlet channel extends to the end surface of the impact end of the auxiliary drill bit.

Each auxiliary air inlet channel is a superfine hole, and the diameter of each auxiliary air inlet channel is not more than 20 mm.

The rear end of each of the auxiliary intake passages merges with a vent chamber.

The vent lumen is located inside the body of the secondary drill bit.

The rear end of the ventilation cavity is connected with the exhaust passage.

And a plurality of main slag discharge grooves are formed in the circumferential side wall of the main drill bit.

Each main slag discharge groove extends from the end face of the driving end of the main drill bit to the end face of the impact end of the main drill bit.

The side wall of the auxiliary drill bit is provided with a plurality of convex blocks.

And a gap between each two lugs forms an auxiliary slag discharge groove.

The center of the bracket is provided with a main through hole.

The main through hole is circular.

The bracket is provided with a plurality of auxiliary through holes around the main through hole.

The main drill bit moves back and forth or rotates relatively in the main through hole.

The auxiliary drill is provided in plurality.

Each of the sub drill bits moves back and forth in each of the sub through holes, respectively.

The impact teeth are in a columnar bar shape.

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

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

And a plurality of secondary side impact teeth are embedded at the impact end of the drill bit body.

The secondary side impact teeth are distributed between every two main 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 inside the main drill body.

Compared with the prior art, the pneumatic-hydraulic combined percussion drill bit has the following beneficial effects:

(1) the soft metal is added while the hard alloy metal is adopted for manufacturing, so that the cost is convenient to control;

(2) the hard metal has higher wear resistance, and the service life can be prolonged;

(3) 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;

(4) a plurality of drilling modes are provided, the main drill bit performs rotary impact, the auxiliary drill bit performs front-back impact, and the drilling efficiency is improved by matching with rock drilling;

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

Drawings

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

FIG. 1 is a schematic structural view of a pneumatic-hydraulic combination percussion drill bit according to the present invention.

In the figure: 1-a main drill bit; 101-impact teeth; 102-primary side impact teeth; 103-secondary side impact teeth; 104-a main intake passage; 105-a slag discharge groove; 11-a secondary drill bit; 111-secondary intake passage; 112-auxiliary 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, and the present embodiment provides a pneumatic and hydraulic combined impact drill, which includes a main drill 1 and an auxiliary drill 11.

The driving end of the main drill bit 1 and the driving end of the auxiliary drill bit 11 are sleeved on the bracket.

The cross section of the main drill bit 1 is circular.

The impact end of the main drill bit 1 is embedded with a plurality of impact teeth 101.

Each of the striking teeth 101 extends beyond the end surface of the striking end of the main drill bit 1.

The impact teeth 101 are made of hard alloy metal.

The main drill bit 1 is made of soft metal.

The impact end of the primary drill bit 1 extends beyond the end face of the impact end of the secondary drill bit 11.

The auxiliary drill bit 11 is made of hard alloy metal;

the secondary drill bit 11 is disposed around the primary drill bit;

the cross section of the pneumatic-hydraulic combined percussion drill bit is rectangular.

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

The outlet of each main air inlet passage 104 extends to the end face of the impact end of the main drill bit 1.

Each of the main intake passages 104 extends to the end face of the driving end of the main bit 1 after the driving ends of the bits converge.

A plurality of sub air intake passages 111 are provided inside the body of the sub bit 11.

The front end of each of the sub air intake passages 111 extends to the end surface of the striking end of the sub drill 11.

Each of the secondary air intake passages 111 is a microfine pore having a diameter of not more than 20 mm.

The rear end of each of the sub-intake passages 111 merges with a ventilation chamber.

The venting cavity is located inside the body of the secondary drill bit 11.

The rear end of the ventilation cavity is connected with the exhaust passage.

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

Each of the slag discharge grooves 105 extends from the end face of the drive end of the drill bit to the end face of the impact end of the drill bit.

The side wall of the auxiliary drill bit 11 is provided with a plurality of convex blocks.

The bumps are arranged in rows and columns.

Gaps are reserved between the bumps in each row.

Gaps are reserved among the convex blocks in each column.

The gap between each of the lugs forms a secondary slag chute 112.

The center of the bracket is provided with a through hole.

The through hole is circular.

The bracket is provided with a plurality of sub through holes around the through hole.

The drill bit moves back and forth or rotates relatively in the through hole.

The sub-drill 11 is provided in plurality.

Each of the sub bits 11 moves back and forth in each of the sub through holes, respectively.

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

The impact end of the main drill bit 1 is also embedded with a plurality of main 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 formed of a hard alloy metal.

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

A plurality of secondary side impact teeth 103 are embedded at the impact end of the main drill bit 1.

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.

The main drill bit 1 is internally provided with a plurality of cavities.

The driving end of the main drill bit 1 and the auxiliary drill bit 11 is arranged on an impactor, the impactor and the main air inlet channel 104 and the auxiliary air inlet channel 111 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 discharge groove 105 and the auxiliary slag discharge groove 112, when water or slurry is used as the power medium of the impactor, other loops are not required to be added, and the water or slurry after work can directly carry out 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.