CN202431206U - Double-annular surface down-the-hole drill bit - Google Patents
Double-annular surface down-the-hole drill bit Download PDFInfo
- Publication number
- CN202431206U CN202431206U CN2012200193212U CN201220019321U CN202431206U CN 202431206 U CN202431206 U CN 202431206U CN 2012200193212 U CN2012200193212 U CN 2012200193212U CN 201220019321 U CN201220019321 U CN 201220019321U CN 202431206 U CN202431206 U CN 202431206U
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- plane
- drill bit
- ring
- inclined surface
- double
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- Expired - Fee Related
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Abstract
The utility model relates to an efficient down-the-hole drill for mine engineering, in particular to a double-annular surface down-the-hole drill bit, which is arranged on an impacter and is used for hole drilling on soft and medium hard rocks. The double-annular surface down-the-hole 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 inclined surface positioned on the outer periphery of the plane, the plane is vertical to the axial line of the drill bit body, a plurality of inner teeth are arranged on the plane, and a plurality of edge teeth are uniformly arranged on the annular inclined surface. The double-annular surface down-the-hole drill bit is characterized in that an inner annular inclined surface is arranged between the plane and the annular inclined surface, the inner annular inclined surface and the annular inclined surface are respectively side surfaces of a conical round table, an included angle between the inner annular inclined surface and the plane is 20 degrees to 25 degrees, and an included angle between the annular inclined surface and the plane is 35 degrees to 45 degrees. Because of the adoption of a drum-shaped structure of double inclined surfaces and the small plane, the inner teeth have different inclination angles, the rocks can be effectively crushed, the rack slag particles are small, and the hole drilling efficiency on the soft and medium hard rocks is greatly improved.
Description
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 double-ring surface down-the-hold drill bit of holing on the soft and hard rock.
Background technology
At present, known down-the-hold drill bit comprises bit body like 138 type drill bits; The bit body head end is provided with big plane; Be positioned at big plane periphery and be provided with the ring-type inclined-plane, the bit body outer surface evenly is provided with some sludge grooves, evenly is provided with some heel teeths and said heel teeth and sludge groove space on the inclined-plane and arranges; Big plane is provided with the pore that some internal tooths and two are communicated with the inner air flue of bit body; Big plane is provided with two row's powder skewed slots, and 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.When this 138 model drill bit is holed on soft and medium-hard rock, because the passivity of its ball tooth is serious in to have restricted the efficient of the construction operation of on soft and medium-hard rock, holing.
Summary of the invention
The purpose of the utility model is to provide a kind of high double-ring surface down-the-hold drill bit of drilling operation, rock penetration performance that can be used for soft and medium-hard rock.
For reaching above purpose; The technical scheme that the utility model adopted is: this double-ring surface down-the-hold drill bit 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 on the inclined-plane; It is characterized in that: ring inclined-plane in being provided with between said plane and the ring-type inclined-plane, said interior ring inclined-plane and ring-type inclined-plane are the side of taper round platform, and the angle on said interior ring inclined-plane and plane is 20 ° ~ 25 °.Angle between said ring-type inclined-plane and the plane is 35 ° ~ 45 °.
Said heel teeth has 7; Said internal tooth has 3, and internal tooth asymmetricly distributes in the plane; Ring has 4 inner circular tooths on the inclined-plane in said, and said inner circular tooth equates with angle between the heel teeth that is close to.
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 sectional view of Fig. 1 embodiment.
The specific embodiment
Like Fig. 1, shown in Figure 2; Said double-ring surface 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 be provided with a plurality of heel teeths 12 on the said ring-type inclined-plane 1, ring inclined-plane 2 in being provided with between said plane 3 and the ring-type inclined-plane 1, said interior ring inclined-plane 2 and ring-type inclined-plane 1 are the side of taper round platform; Ring inclined-plane 2 is 20 ° ~ 25 ° with the angle on plane 3 in said, and present embodiment adopts 25 ° of angles.Angle between said ring-type inclined-plane 1 and the plane 3 is 35 ° ~ 45 °, and present embodiment adopts 35 ° of angles.
In addition, said heel teeth 12 has 7; Said internal tooth 31 has 3, and internal tooth 31 asymmetricly is distributed on the plane 3; Ring has 4 inner circular tooths 32 on the inclined-plane 2 in said, and said inner circular tooth 32 equates with angle between the heel teeth 12 that is close to.
Inner circular tooth 32 is identical with internal tooth 31 structures, both can adopt common ball toothing, also can adopt the awl toothing, and the sphere diameter of heel teeth 12 is greater than the sphere diameter of internal tooth 3, with the intensity and the application life of improving each tooth.Owing to have different inclination angles respectively between ring-type inclined-plane 1 and interior ring inclined-plane 2 and the plane 3, so heel teeth 12 and inner circular tooth 32 have certain outward-dipping inclination angle, its shape is as cydariform, the bit freezing in the time of can preventing operation.
The structure of these other parts of drill bit can adopt conventional design; The quantity of sludge groove 11 and heel teeth 12 equates, all is 7, and heel teeth 12 sphere diameters are 18mm; Internal tooth 31 sphere diameters are 14mm; 7 heel teeths 12 are uniformly distributed in diameter phi 1 on the circumference of 122mm, distribute with 51.43 ° of angles, and 4 inner circular tooths 32 are uniformly distributed in diameter phi 2 on the circumference of 92mm; And these 4 inner circular tooths 32 respectively and the angle between the adjacent heel teeth be 25.71 °, and 3 internal tooths 3 are distributed in same straight line and lay respectively at diameter phi 3 for 64mm, φ 4 for 48mm and φ 5 on the 20mm circumference; Heel teeth and internal tooth, inner circular tooth such distribution on bit body 5 head ends, the rotary motion trace of the tooth on the adjacent circumferential when rotating have suitable overlapping, and metope is not stayed in rock drilling, and rock drilling is thorough.The diameter of two pores 4 then adopts 22mm, and the line between two pores, 4 centers is through 3 centers, plane, two pores 4 and is connected with two pores 4 respectively two arrange powder skewed slots 41 and be 154.29 ° of layouts at bit body 5 head ends.
Claims (2)
1. double-ring surface 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) are provided with some internal tooths (31), evenly are provided with a plurality of heel teeths (12) on the said ring-type inclined-plane (1); It is characterized in that: ring inclined-plane (2) in being provided with between said plane (3) and ring-type inclined-plane (1); Ring inclined-plane (2) and ring-type inclined-plane (1) are the side of taper round platform in said, and said interior ring inclined-plane (2) is 20 ° ~ 25 ° with the angle on plane (3), and the angle between said ring-type inclined-plane (1) and plane (3) is 35 ° ~ 45 °.
2. double-ring surface down-the-hold drill bit according to claim 1 is characterized in that: said heel teeth (12) has 7; Said internal tooth (31) has 3, and internal tooth (31) asymmetricly is distributed on the plane (3); Have 4 inner circular tooths (32) on ring inclined-plane (2) in said, said inner circular tooth (32) equates with angle between the heel teeth (12) that is close to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200193212U CN202431206U (en) | 2012-01-17 | 2012-01-17 | Double-annular surface down-the-hole drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200193212U CN202431206U (en) | 2012-01-17 | 2012-01-17 | Double-annular surface down-the-hole drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202431206U true CN202431206U (en) | 2012-09-12 |
Family
ID=46780666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200193212U Expired - Fee Related CN202431206U (en) | 2012-01-17 | 2012-01-17 | Double-annular surface down-the-hole drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202431206U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103981313A (en) * | 2014-05-07 | 2014-08-13 | 西北矿冶研究院 | Blast furnace tapping hole drill |
| CN105134082A (en) * | 2015-07-24 | 2015-12-09 | 盐城市鑫源铜业有限公司 | Heavy-duty annular drill bit and manufacturing method for same |
-
2012
- 2012-01-17 CN CN2012200193212U patent/CN202431206U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103981313A (en) * | 2014-05-07 | 2014-08-13 | 西北矿冶研究院 | Blast furnace tapping hole drill |
| CN105134082A (en) * | 2015-07-24 | 2015-12-09 | 盐城市鑫源铜业有限公司 | Heavy-duty annular drill bit and manufacturing method for same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120912 Termination date: 20150117 |
|
| EXPY | Termination of patent right or utility model |