CN202431198U

CN202431198U - High-speed tunneling downhole drill bit

Info

Publication number: CN202431198U
Application number: CN2012200193208U
Authority: CN
Inventors: 李保顺; 李梅; 赵国荣; 郑世月; 邬月云; 孟繁宝; 朱同兰; 候磊磊; 朱月坤; 高子路; 王荣起
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-01-17
Filing date: 2012-01-17
Publication date: 2012-09-12
Anticipated expiration: 2022-01-17

Abstract

The utility model relates to an efficient downhole drilling tool for mining engineering, in particular to a high-speed tunneling downhole drill bit, which is installed on an impact device and is used for drilling holes in soft and medium hard rocks. The high-speed tunneling downhole drill bit comprises a drill bit body, wherein the head part of the drill bit body is provided with a round plane and an annular slope on the periphery of the plane, the plane is vertical to the axial line of the drill bit body and is provided with a plurality of inner teeth, the annular slope is uniformly provided with a plurality of side teeth and powder discharging slots, and the side teeth and the powder discharging slots are arranged at intervals. The high-speed tunneling downhole drill bit is characterized in that an inner annular slope is arranged between the plane and the annular slope, and the included angle between the inner annular slope and the plane is smaller than the included angle between the annular slope and the plane; the inner annular slope is uniformly provided with a plurality of inner annular teeth, and the inner annular teeth have the same structure as the inner teeth; and the head part of the drill bit body is provided with two air holes communicated with an air channel in the drill bit body; and the connecting line of the centers of the two air holes penetrates through the center of the plane. The high-speed tunneling downhole drill bit has the beneficial effects that since the drum structure with two slopes and one small plane is adopted and the inner teeth have different inclinations, rocks can be broken effectively, the particle size of rock slag is small, and the efficiency in drilling holes in the soft and medium hard rock is increased greatly.

Description

A kind of high speed driving down-the-hold drill bit

Technical field

The utility model relates to a kind of mine engineering with efficient down-the-hole drilling tool, and especially a kind of being installed on the impactor is used for the high speed driving down-the-hold drill bit of holing on the soft and hard rock.

Background technology

At present, known down-the-hold drill bit head construction mostly is big plane, generally is used for various minings.One Chinese patent application prospectus CN 201232525Y discloses a kind of down-the-hold drill bit; Comprise bit body, the bit body head end is provided with big plane, is positioned at big plane periphery and is provided with the ring-type inclined-plane; The bit body outer surface evenly is provided with some sludge grooves; Evenly be provided with some heel teeths and said heel teeth and sludge groove space on the inclined-plane and arrange, big plane is provided with the pore that some internal tooths and two are communicated with the inner air flue of bit body, and big plane is provided with two row's powder skewed slots; Row's powder skewed slot is communicated with two in said two pores and the sludge groove respectively, and the line between the two pore centers passes said big planar central.For in hole on the hard above rock, this down-the-hold drill bit has reduced torsional forces that monodentate bore and impact, makes the heel teeth wearing and tearing little, and is can corresponding raising cutter fast, and each tooth is had favorable cooling effect, thereby prolonged bit life greatly.But on soft and medium-hard rock, holing, because the passivity of its ball tooth, to have restricted the efficient of effectively carrying out fast of on soft and medium-hard rock, holing and construction operation.

Summary of the invention

The purpose of the utility model is to provide a kind of fast high speed driving down-the-hold drill bit of drilling operation, cutting rate that can be used for soft and medium-hard rock.

For reaching above purpose; The technical scheme that the utility model adopted is: this tunnels down-the-hold drill bit at a high speed and comprises bit body; Said bit body head is provided with circular plane, is positioned at the ring-type inclined-plane of plane periphery, the axis normal of said plane and bit body, and the plane is provided with some internal tooths; Said ring-type evenly is provided with a plurality of heel teeths and sludge groove on the inclined-plane; Arrange heel teeth and sludge groove space, it is characterized in that: ring inclined-plane in being provided with between said plane and the ring-type inclined-plane, and the angle on said interior ring inclined-plane and plane is less than the angle between ring-type inclined-plane and the plane; Even a plurality of inner circular tooths that distribute on the ring inclined-plane in said, the structure of said inner circular tooth is identical with internal tooth; Said bit body head is provided with two pores that are communicated with the inner air flue of bit body, and the line at said two pore centers is through the center of circle on plane.

Said sludge groove and heel teeth respectively have 8, and said internal tooth has 2, and the centre distance on 2 internal tooths and plane is unequal, and said inner circular tooth has 4, and angle is 22.5 ° between said each inner circular tooth and the adjacent heel teeth.

Adopted technique scheme; The beneficial effect of the utility model is: owing to be to have adopted double inclined plane to add faceted drum organization, its internal tooth has different inclination angles, can smash rock effectively; The rock solid impurity particle is little, has improved the efficient of holing on the rock hard in soft reaching greatly.

Description of drawings

Fig. 1 is an embodiment end face structure of a utility model sketch map.

Fig. 2 is the A-A sectional view of Fig. 1 embodiment.

The specific embodiment

Like Fig. 1, shown in Figure 2; Said a kind of high speed driving down-the-hold drill bit comprises bit body 5, and said bit body 5 heads are provided with circular plane 3, are positioned at the ring-type inclined-plane 1 of plane 3 peripheries; The axis normal of said plane 3 and bit body 5; Plane 3 is provided with some internal tooths 31, evenly is provided with a plurality of heel teeths 12 and sludge groove 11 on the said ring-type inclined-plane 1, and heel teeth 12 is arranged with sludge groove 11 spaces; Ring inclined-plane 2 in being provided with between said plane 3 and the ring-type inclined-plane 1, the angle on said interior ring inclined-plane 2 and plane 3 is less than the angle between ring-type inclined-plane 1 and the plane 3; Even a plurality of inner circular tooths 32 that distribute on the ring inclined-plane 2 in said, the structure of said inner circular tooth 32 is identical with internal tooth 31; Said bit body 5 heads are provided with two pores 4 that are communicated with bit body 5 inner air flues, and the line at said two pores 4 centers is through the center of circle on plane 3.Be connected through arranging powder skewed slot 41 between pore 4 and the contiguous sludge groove 11.

An embodiment as the utility model; Said sludge groove 11 respectively has 8 with heel teeth 12, and said internal tooth 31 has 2, and 2 internal tooths 31 are unequal with the centre distance on plane 3; Said inner circular tooth 32 has 4, and angle is 22.5 ° between said each inner circular tooth 32 and the adjacent heel teeth.

Owing to be to have adopted double inclined plane to add faceted drum organization, its internal tooth can smash rock effectively for the awl tooth, and the rock solid impurity particle is little, has improved the efficient of holing on the rock hard in soft reaching greatly.

Claims

1. a high speed is tunneled down-the-hold drill bit; Comprise bit body (5); Said bit body (5) head is provided with circular plane (3), is positioned at the ring-type inclined-plane (1) of plane (3) periphery; The axis normal of said plane (3) and bit body (5); Plane (3) is provided with some internal tooths (31), evenly is provided with a plurality of heel teeths (12) and sludge groove (11) on the said ring-type inclined-plane (1), and heel teeth (12) is arranged with sludge groove (11) space; It is characterized in that: ring inclined-plane (2) in being provided with between said plane (3) and ring-type inclined-plane (1), the angle of said interior ring inclined-plane (2) and plane (3) is less than the angle between ring-type inclined-plane (1) and plane (3); The a plurality of inner circular tooths (32) that evenly distribute are gone up on ring inclined-plane (2) in said, and the structure of said inner circular tooth (32) is identical with internal tooth (31); Said bit body (5) head is provided with two pores (4) that are communicated with the inner air flue of bit body (5), and the line at said two pores (4) center is through the center of circle on plane (3).

2. a kind of high speed driving down-the-hold drill bit according to claim 1; It is characterized in that: said sludge groove (11) and heel teeth (12) respectively have 8; Said internal tooth (31) has 2; 2 internal tooths (31) are unequal with the centre distance on plane (3), and said inner circular tooth (32) has 4, and angle is 22.5 ° between said each inner circular tooth (32) and the adjacent heel teeth.