CN112878915A - Down-the-hole drill bit and pneumatic down-the-hole hammer using same - Google Patents
Down-the-hole drill bit and pneumatic down-the-hole hammer using same Download PDFInfo
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- CN112878915A CN112878915A CN202110330110.4A CN202110330110A CN112878915A CN 112878915 A CN112878915 A CN 112878915A CN 202110330110 A CN202110330110 A CN 202110330110A CN 112878915 A CN112878915 A CN 112878915A
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- drill
- drill bit
- hole
- tooth
- teeth
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- 230000007704 transition Effects 0.000 claims description 2
- 238000005553 drilling Methods 0.000 abstract description 31
- 239000011435 rock Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/36—Percussion drill bits
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
- E21B10/43—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
本发明涉及钻进设备技术领域，具体涉及一种潜孔钻头及使用该潜孔钻头的气动潜孔锤。本发明实施例提供的潜孔钻头，包括钻头本体、钻杆和钻齿，所述钻头本体为四边形结构，所述钻头本体远离钻杆一侧的表面上设有多个齿组，每个所述齿组包括多个所述钻齿，多个所述齿组以所述潜孔锤的旋转轴线为圆心分布在不同半径的同心圆轨迹上；由于钻头本体是四边形结构，且钻头本体表面的齿组分布在以气动潜孔锤的旋转轴线的同心圆轨迹上，因此每个齿组包含的钻齿的数量大致相同，保证钻头本体上每个钻齿受力大致相同，每个钻齿受力均衡，每个钻齿的受力程度、磨损程度大致相同，大大增加了钻头的使用寿命。
The invention relates to the technical field of drilling equipment, in particular to a down-the-hole drill bit and a pneumatic down-the-hole hammer using the down-the-hole drill bit. The DTH drill bit provided by the embodiment of the present invention includes a drill bit body, a drill rod and drill teeth. The drill bit body is a quadrilateral structure, and a surface of the drill bit body on the side away from the drill rod is provided with a plurality of tooth groups. The tooth group includes a plurality of the drill teeth, and the plurality of the tooth groups are distributed on concentric circle tracks of different radii with the rotation axis of the down-the-hole hammer as the center; because the drill body is a quadrilateral structure, and the surface of the drill body is The tooth groups are distributed on the concentric locus of the rotation axis of the pneumatic down-the-hole hammer, so the number of drill teeth contained in each tooth group is approximately the same, ensuring that the force of each drill tooth on the drill body is approximately the same, and each drill tooth is subjected to approximately the same force. The force is balanced, and the degree of force and wear of each drill tooth is roughly the same, which greatly increases the service life of the drill bit.
Description
Technical Field
The invention relates to the technical field of drilling equipment, in particular to a down-the-hole drill bit and a pneumatic down-the-hole hammer using the same.
Background
The rotary drilling rig is a construction machine widely applied to rock and soil construction at home and abroad for hole forming operation, and has the characteristics of manual replacement, large installed power, large output torque, large axial pressure, flexibility, high construction efficiency and the like. For medium and hard bedrock strata which are relatively complete and have no developed bedding fractures, the common method is that a rotary drilling rig is combined with a pneumatic down-the-hole hammer for use. The pneumatic down-the-hole hammer is a pneumatic impact rock-entering machine tool taking compressed air as power. The impact force generated by the air with certain pressure provided by the air compressor is directly transmitted to the drill bit, the drill bit is rotated pneumatically to form the pulsating crushing capability to the rock, and meanwhile, the compressed air discharged by the impactor is utilized to cool the drill bit and discharge crushed rock particles, so that the purpose of efficiently entering the rock by hole bottom impact crushing is realized.
The drill bit of the prior pneumatic down-the-hole hammer is of a circular structure, a plurality of tooth groups are distributed on the surface of the drill bit, each tooth group comprises a plurality of drill teeth, the plurality of drill teeth are distributed into a circular ring shape by taking the central line of the drill bit as the axis, the plurality of tooth groups form a plurality of concentric circle structures on the surface of the drill bit, and each tooth group comprises 6 to 8 drill teeth; when the down-the-hole hammer is used, a plurality of drill bits are installed, the drill bits are distributed on the same circumference by taking the rotation axis of the down-the-hole hammer as the axis, and the number of the drill teeth distributed on the circumference on the surface of each drill bit by taking the down-the-hole hammer as the axis is greatly different because the axis of the drill bit is not collinear with the rotation axis of the down-the-hole hammer, for example, only one drill tooth is distributed on the circumference which is closest to the rotation axis of the down-the-hole hammer and farthest from the rotation axis of the down-the-hole hammer, the stress of the drill teeth of each part on the drill bit is uneven, and the like, so that the.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the drilling teeth in each area of the existing pneumatic down-the-hole hammer drill bit are not uniformly stressed, and parts of the drilling teeth are damaged in an aggravating way, so that the service life of the drill bit is greatly shortened.
(II) technical scheme
In order to solve the technical problem, an embodiment of the present invention provides a down-the-hole drill bit for a pneumatic down-the-hole hammer, where the down-the-hole drill bit includes a drill bit body, a drill rod, and drill teeth, one end of the drill rod is connected to the drill bit body, the drill bit body is of a quadrilateral structure, a plurality of tooth sets are provided on a surface of the drill bit body on a side away from the drill rod, each tooth set includes a plurality of drill teeth, and the plurality of tooth sets are distributed on concentric circular tracks with different radii by using a rotation axis of the down-the-hole hammer as a center.
According to one embodiment of the invention, the plurality of drill teeth on each set of teeth are evenly distributed on concentric circular tracks centred on the axis of rotation of the down-the-hole hammer.
According to one embodiment of the invention, any two of said sets of teeth comprise a difference in the number of drill teeth which is less than or equal to two.
According to one embodiment of the invention, the drill bit body comprises a plane portion and inclined portions, the plane portion is of a quadrilateral structure, each edge of the plane portion is connected with one inclined portion, one end of each inclined portion is connected with the edge of the plane portion, and the other end of each inclined portion is inclined to the side far away from the side provided with the drill teeth.
According to an embodiment of the invention, the planar portion is rectangular; the planar portion and the inclined portion are of an integrally formed structure.
According to one embodiment of the invention, two edges of the planar portion closest and farthest to the axis of rotation of the pneumatic down-the-hole hammer are first arcs centered on the axis of rotation of the down-the-hole hammer.
According to one embodiment of the invention, the edges of the two inclined portions closest and furthest from the axis of rotation of the down-the-hole hammer, away from the planar portion, are second arcs centred on the axis of rotation of the pneumatic down-the-hole hammer.
According to one embodiment of the invention, the junction of two adjacent inclined portions is transited by a circular arc.
According to one embodiment of the invention, the drill teeth comprise a cylindrical section embedded in the drill bit body and a spherical section located on a surface of the drill bit body.
In another aspect of the invention, a pneumatic down-the-hole hammer includes a down-the-hole drill bit as described in any of the above embodiments.
The invention has the beneficial effects that: the down-the-hole drill bit provided by the embodiment of the invention comprises a drill bit body, a drill rod and drill teeth, wherein the drill bit body is of a quadrilateral structure, a plurality of tooth groups are arranged on the surface of one side of the drill bit body, which is far away from the drill rod, each tooth group comprises a plurality of drill teeth, and the plurality of tooth groups are distributed on concentric circular tracks with different radiuses by taking the rotation axis of the down-the-hole hammer as the center of a circle; because the drill bit body is of a quadrilateral structure, and the tooth groups on the surface of the drill bit body are distributed on the concentric track of the rotation axis of the pneumatic down-the-hole hammer, the number of the drilling teeth contained in each tooth group is approximately the same, the stress of each drilling tooth on the drill bit body is approximately the same, the stress of each drilling tooth is balanced, the problem that the stress of partial drilling teeth is overlarge due to the unreasonable distribution of the drilling teeth is avoided, the problem that the partial drilling teeth are damaged in an accelerating manner due to the unbalanced stress of the drilling teeth is solved, the stress degree and the abrasion degree of each drilling tooth are approximately the same, and the service life of the drill bit is greatly prolonged.
Drawings
The advantages of the above and/or additional aspects of the present invention will become apparent and readily appreciated from the following description of the embodiments taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic representation of a down-the-hole drill bit according to one embodiment of the present invention;
FIG. 2 is a bottom view of the bit body;
figure 3 is a schematic view of the orifice drop prior to actuation.
Wherein the correspondence between the reference numbers and the names of the components in fig. 1 to 3 is:
1-a down-the-hole drill bit; 2-a drill bit body; 21-plane section; 211 — a first arc; 22-an inclined portion; 221-a second arc; 3-drilling a drill pipe; 4-drilling teeth.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
As shown in fig. 1, an embodiment of the present invention provides a down-the-hole drill bit 1 for a pneumatic down-the-hole hammer 5, where the down-the-hole drill bit 1 includes a bit body 2, a drill rod 3, and drill teeth 4, one end of the drill rod 3 is connected to the bit body 2, the bit body 2 is of a quadrilateral structure, a plurality of tooth sets are provided on a surface of the bit body 2 on a side away from the drill rod 3, each tooth set includes a plurality of drill teeth 4, and the plurality of tooth sets are distributed on concentric tracks with different radii by using a rotation axis of the down-the-hole hammer as a center.
In the down-the-hole drill bit 1 provided by the embodiment, the drill bit body 2 is of a quadrilateral structure, and the tooth groups on the surface of the drill bit body 2 are distributed on a concentric track with the rotation axis of the pneumatic down-the-hole hammer 5 as the center, that is, a plurality of tooth groups are distributed on concentric tracks with different radiuses, so that the number of the drill teeth 4 contained in each tooth group can be substantially the same, when the pneumatic down-the-hole hammer 5 drives the drill bit body 2 to rotate through the drill rod 3, the number of the drill teeth 4 arranged on each concentric track with the pneumatic down-the-hole hammer 5 as the center can be substantially the same, and the stress degree and the wear degree of each drill tooth 4 are substantially the same; in the drill bit in the prior art, the number of the drill teeth 4 arranged on the concentric circular track taking the pneumatic down-the-hole hammer 5 as the center of a circle is different, for example, on the concentric circular track closest to or farthest from the rotation axis of the pneumatic down-the-hole hammer 5, only one drill tooth 4 is arranged, the number of the drill teeth 4 on the concentric circular track between the two drill teeth is more than one, and the sum of the stress of all the drill teeth 4 on each concentric circular track is approximately the same, so that under the condition that the difference of the number of the drill teeth 4 is large, the stress difference of each drill tooth 4 is large, the drill teeth 4 with large stress are worn more rapidly, the drill bit body 2 needs to be replaced after any drill tooth 4 is worn to a certain degree, and the stress of part of the drill teeth 4 is uneven, the accelerated wear can greatly reduce the service life of the drill bit; and the arrangement of tooth group in this application coincides with the cutting orbit, and the drilling tooth 4 quantity that distributes on every cutting orbit is the same on an average, and the atress of the drilling tooth 4 that every tooth group constitutes is balanced relatively, and the degree of wear is also roughly the same, consequently can improve the life of drill bit body 2 greatly.
According to one embodiment of the invention, the plurality of drilling teeth 4 on each set of teeth are evenly distributed on concentric circular tracks centered on the axis of rotation of the down-the-hole hammer; as shown in fig. 2, six sets of tooth groups are arranged on the drill bit body 2, each set of tooth group includes 5 or 7 drill teeth 4, and a plurality of drill teeth 4 are uniformly distributed on each tooth group at intervals, so that the stress balance of each drill tooth 4 on each tooth group can be ensured, the problem of excessive wear of individual thick-line tooth groups is further reduced, and the service life of the down-the-hole drill bit 1 is prolonged. Optionally, the difference between the number of the drilling teeth 4 on each tooth group is less than or equal to two, as shown in fig. 2, the difference between the number of the drilling teeth 4 on the tooth group on the surface of the drill bit body 2 is equal to two, for example, five drilling teeth 4 are arranged on the concentric circular trajectory line closest to the axis of the start-up down-the-hole drill bit 1 and the drill bit, and the number of the drilling teeth 4 in the middle of the two is seven, so that the stress of each drilling tooth 4 on each concentric circular trajectory is relatively balanced, and the service life of the down-the-hole drill bit 1 is further prolonged.
As shown in fig. 2, the drill body 2 includes a flat portion 21 and inclined portions 22, the flat portion 21 has a quadrilateral structure, each edge of the flat portion 21 is connected to one of the inclined portions 22, one end of each of the inclined portions 22 is connected to an edge of the flat portion 21, and the other end is inclined toward a side away from the drill bit 4. In this embodiment, the middle of the drill bit body 2 is of a quadrilateral structure, the edge of the drill bit body is arranged to incline towards the outside, the integral edge angle of the drill bit body 2 inclines towards the surface far away from one side of the drill teeth 4, namely the edge angle of the drill bit body 2 does not contact the surface of the rock in the drilling process, so that the drilling surface of the integral drill bit body 2 can be protected in the drilling process. As shown in fig. 2, in the present embodiment, the drill teeth 4 are provided on both the inclined portion 22 and the flat portion 21. Meanwhile, the connection part of the two connected inclined parts 22 is in arc transition, when the down-the-hole drill bit 1 is started to drive the drill bit body 2 to rotate, the part of the surface of the drill bit body 2, which is in rock contact with the surface, is an arc surface, so that the abrasion to the corners of the drill bit body 2 can be reduced, and the service life of the down-the-hole drill bit 1 is further prolonged. Preferably, in this embodiment, the inclined portion 22 and the planar portion 21 are integrally formed, so that the strength of the whole bit body 2 is better, and the problem of fracture of the joint of the bit body 2 is avoided.
According to one embodiment of the invention, as shown in fig. 2, the two edges of the planar portion 21 closest and farthest to the axis of rotation of the pneumatic down-the-hole hammer 5 are first arcs 211, the first arcs 211 being centered on the axis of rotation of the down-the-hole hammer; the edges of the two inclined parts 22 which are closest to and farthest from the rotation axis of the down-the-hole hammer and far away from the plane part 21 are second arc lines 221, the second arc lines 221 use the rotation axis of the pneumatic down-the-hole hammer 5 as a circle center, and the whole drill bit body 2 is of a fan-like structure, so that the stress of each drill tooth 4 is balanced, the drill bit body 2 is more balanced in hand, and the contact surface between the outermost edge of the drill bit body 2 and a rock stratum is an arc in the drilling process, so that the abrasion of the drill bit body 2 can be reduced.
According to one embodiment of the present invention, the drill teeth 4 comprise a cylindrical section embedded in the drill bit body 2 and a spherical section located on the surface of the drill bit body 2; the cylinder end is embedded into the drill bit body 2, so that the connection strength of the drill teeth 4 can be improved, the abrasion of the drill teeth 4 in the drilling process can be reduced by the spherical section, the resistance received in the drilling process is smaller, and the drilling efficiency is higher.
According to another aspect of the present invention, an embodiment of the present invention further provides a pneumatic down-the-hole hammer 5, including the down-the-hole drill 1 according to any of the above embodiments, where the down-the-hole drill 1 of the pneumatic down-the-hole hammer 5 provided in this embodiment has a greatly increased life, and the use cost of the down-the-hole drill 1 can be saved.
As shown in fig. 3, the pneumatic down-the-hole hammer 5 of the present embodiment is provided with two types of down-the-hole drill bits 1, wherein the two types of down-the-hole drill bits 1 both satisfy the requirements of the structure of the above-described embodiment, wherein the cutting trajectory of the tooth group is indicated by the broken line in fig. 3. Such as: the down-the-hole drill bits 1 of two specifications comprise a drill bit body 2 and a drill rod 3, wherein the drill bit body 2 comprises inclined parts 22 and a plane part 21, and the four inclined parts 22 are connected to the four edges of the plane part 21 and inclined towards one side far away from the drill teeth 4; the two types of down-the-hole drill bits 1 are mainly different in that the tooth groups formed by the drill teeth 4 are distributed on the surface of the drill bit body 2 in different tracks, and the tooth groups corresponding to the same position on the down-the-hole drill bits 1 of the two specifications are distributed in a staggered mode in the radial direction with the rotation axis of the pneumatic down-the-hole hammer 5 as the center of a circle. For example, the down-the-hole drill bit 1 comprises two types a and B, the track of the tooth set closest to the axis of rotation of the pneumatic down-the-hole hammer 5 on the down-the-hole drill bit 1 of type a is 100mm from the axis of rotation of the pneumatic down-the-hole hammer 5, the distance between the track of the tooth group closest to the rotation axis of the pneumatic down-the-hole hammer 5 on the type B down-the-hole drill bit 1 and the rotation axis of the pneumatic down-the-hole hammer 5 is 110mm, the two are arranged in a staggered way in the radial direction, the tracks of other sets of teeth are also staggered, and the down-the-hole drill bits 1 comprised by the pneumatic down-the-hole hammer 5 are also staggered, for example, the pneumatic down-the-hole hammer 5 comprises six down-the-hole drill bits, and the six down-the-hole drill bits A-B-A-B-A-B are arranged in a staggered mode and are arranged on the circumference with the rotating shaft center of the pneumatic down-the-hole hammer 5 as the axis, so that the pneumatic down-the-hole hammer 5 can form more cutting tracks.
In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the communication may be direct, indirect via an intermediate medium, or internal to both elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110330110.4A CN112878915A (en) | 2021-03-29 | 2021-03-29 | Down-the-hole drill bit and pneumatic down-the-hole hammer using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110330110.4A CN112878915A (en) | 2021-03-29 | 2021-03-29 | Down-the-hole drill bit and pneumatic down-the-hole hammer using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112878915A true CN112878915A (en) | 2021-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110330110.4A Withdrawn CN112878915A (en) | 2021-03-29 | 2021-03-29 | Down-the-hole drill bit and pneumatic down-the-hole hammer using same |
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| CN (1) | CN112878915A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0111598D0 (en) * | 2000-05-30 | 2001-07-04 | Baker Hughes Inc | Laminated and composite impregnated cutting structures for drill bits |
| CN201747280U (en) * | 2010-08-20 | 2011-02-16 | 北京市三一重机有限公司 | Impact cylinder drilling tool and rotary drilling rig |
| US20130306379A1 (en) * | 2011-02-11 | 2013-11-21 | Top Mark Mechanical Equipment Limited | Annulus Ring Hole Drill |
| US20140131116A1 (en) * | 2012-11-09 | 2014-05-15 | Center Rock Inc. | Non-rotating drill bit for a down-the-hole drill hammer |
| CN105569563A (en) * | 2015-12-31 | 2016-05-11 | 长安大学 | Rotary drilling rig bit capable of impact drilling |
| CN112065283A (en) * | 2020-08-13 | 2020-12-11 | 祁东县锋速钻探工具有限公司 | Diamond bit for large-caliber drilling construction |
| CN214944009U (en) * | 2021-03-29 | 2021-11-30 | 赵鑫宇 | Down-the-hole drill bit and pneumatic down-the-hole hammer using same |
-
2021
- 2021-03-29 CN CN202110330110.4A patent/CN112878915A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0111598D0 (en) * | 2000-05-30 | 2001-07-04 | Baker Hughes Inc | Laminated and composite impregnated cutting structures for drill bits |
| CN201747280U (en) * | 2010-08-20 | 2011-02-16 | 北京市三一重机有限公司 | Impact cylinder drilling tool and rotary drilling rig |
| US20130306379A1 (en) * | 2011-02-11 | 2013-11-21 | Top Mark Mechanical Equipment Limited | Annulus Ring Hole Drill |
| US20140131116A1 (en) * | 2012-11-09 | 2014-05-15 | Center Rock Inc. | Non-rotating drill bit for a down-the-hole drill hammer |
| CN105569563A (en) * | 2015-12-31 | 2016-05-11 | 长安大学 | Rotary drilling rig bit capable of impact drilling |
| CN112065283A (en) * | 2020-08-13 | 2020-12-11 | 祁东县锋速钻探工具有限公司 | Diamond bit for large-caliber drilling construction |
| CN214944009U (en) * | 2021-03-29 | 2021-11-30 | 赵鑫宇 | Down-the-hole drill bit and pneumatic down-the-hole hammer using same |
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Application publication date: 20210601 |