CN106150395B - Boring by percussion drilling tool - Google Patents
Boring by percussion drilling tool Download PDFInfo
- Publication number
- CN106150395B CN106150395B CN201610738344.1A CN201610738344A CN106150395B CN 106150395 B CN106150395 B CN 106150395B CN 201610738344 A CN201610738344 A CN 201610738344A CN 106150395 B CN106150395 B CN 106150395B
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- China
- Prior art keywords
- blind hole
- tapped blind
- thread
- screw thread
- external
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000005553 drilling Methods 0.000 title claims abstract description 20
- 238000009527 percussion Methods 0.000 title claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 35
- 239000010959 steel Substances 0.000 claims abstract description 35
- 230000007704 transition Effects 0.000 claims abstract description 5
- 241001391944 Commicarpus scandens Species 0.000 abstract 1
- 230000007547 defect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
- E21B17/0426—Threaded with a threaded cylindrical portion, e.g. for percussion rods
Landscapes
- 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)
- Surgical Instruments (AREA)
Abstract
The invention discloses a kind of boring by percussion drilling tools, belong to drill rod；It is intended to provide a kind of drill rod with long service life.It includes the drill steel that the diaper body for being threaded blind hole, the external screw thread by being located at leading portion position and the blind hole are connected；Drill steel（2）For multidiameter structure；External thread section（2‑1）Front end have cylindric changeover portion（2‑4）, the length of the changeover portion is less than or equal to tapped blind hole（1‑2）Screw-thread ending at and bottom hole（1‑1）Distance；External thread section（2‑1）With stage casing（2‑2）Between pass through the conical surface shaft shoulder（2‑3）Connect transition, tapped blind hole（1‑2）Aperture at have inner conical surface compatible with the shaft shoulder（1‑3）；Work as external thread section（2‑1）With tapped blind hole（1‑2）Changeover portion when cooperation is tightened（2‑4）Front end face（2‑5）With tapped blind hole（1‑2）Bottom hole（1‑1）Contact.The diaper body and drill steel of drilling tool of the present invention are not easy to break, are a kind of improved structures of drill rod.
Description
Technical field
The present invention relates to a kind of drill rod more particularly to a kind of boring by percussion drilling tools.
Background technology
Currently, boring by percussion drilling tool is usually formed by connecting by drill steel by the diaper body of screw thread and bore bit.In rock drilling process
In, drill steel, diaper body stressing conditions are more complicated, severe, be easy to cause drilling tool failure, influence the drilling tool service life.It makes discovery from observation,
There are mainly two types of forms for drilling tool failure：1）It is broken at the internal thread ending of diaper body tapped blind hole；2）Drill steel external thread section is received
It is broken at tail.By analysis, cause diaper body or drill steel major cause of failure as follows：
1）Due to offering escape at interior screw-thread ending, the diaper body wall corresponded at the withdrawing groove location is relatively thin, strong
Degree is weaker, and stress is usually focused on the intersection of escape and tapped blind hole, therefore to be easily happened at screw thread blind for diaper body fracture
The intersection in hole and escape.
2）Since stress has focused largely at drill steel external screw thread ending, drill steel is easy in external screw thread when by Moment
It is broken at ending.
For this purpose, " US6767156B1 " discloses a kind of impact type threaded connection drill rod.The drill steel of the patent has two
A tapered guide face（One external thread section front end for being located at drill steel, another be located at the intersection of the shaft shoulder and external thread section）, trousers
There are two inner conical surfaces corresponding with above-mentioned two tapered guide face, and shaft shoulder right angle end face and diaper body end face in the tapped blind hole of body
It is kept in contact, therefore positioning is crossed there are serious axial（Two tapered guide faces and shaft shoulder right angle end face）, in diameter
There is also cross to position in direction（Two tapered guide faces）.Although above structure can bear larger moment of flexure, axial punching is born
The ability for hitting power is weaker.In actual use, even if two matching relationships between inner conical surface and the shaft shoulder handle very well（It is fixed to cross
The interference degrees of position are smaller）, but after structure stand under load deforms（Especially near female end face）Very likely occur by pricker
Bar shaft shoulder right angle end face（Or corresponding internal thread end face）And the conical surface of drill steel external thread section front end bears moment of flexure, so as to cause
The carrying arm of force reduces suddenly, moment of flexure local stress increases.Meanwhile when shaft shoulder face（Or internal thread end face）When discontinuity,
The impact force of transmission（The Main Load transmitted for combiner）The degree that stress raisers can further be increased, leads to part
Failure in short time.
In addition, " CN10289110B " is disclosed a kind of " drill bit bored for impact type rock ", which is with spiral shell in one section
Line substitutes the escape in tapped blind hole, although the defect that diaper body wall can be overcome relatively thin at escape, internal thread machining
It is relatively difficult.Moreover, due to eliminating escape, internal thread extends to the bottom hole of tapped blind hole；Therefore in interior spiral shell
Stress concentration can be formed at line ending between the bottom hole of tapped blind hole, is easy tod produce so as to cause internal thread and bottom hole intersection
Crackle.In addition, since the drill steel of the patent is not provided with the shaft shoulder, diaper body end face and threaded engagement line are similar to simply supported beam knot
Structure necessarily causes external screw thread to be broken at threaded engagement line under Moment, this is also that current traditional external screw thread is most important
Failure mode.
Invention content
In view of the above defects of the prior art, the present invention is intended to provide a kind of boring by percussion drilling tool, it is not only
The tapped blind hole hole bottom that can avoid diaper body cracks and can also prevent from being broken at drill steel external screw thread ending, to
Effectively improve the drilling tool service life.
To achieve the goals above, the present invention uses following technical scheme：It includes the trousers with cylindrical thread blind hole
Body, the drill steel being connected with the tapped blind hole by being located at the external screw thread at leading portion position；Drill steel is the ladder with stage casing
Axle construction；The front end of external thread section has the cylindric changeover portion that diameter is less than tapped blind hole, the length of the changeover portion to be less than or wait
At the screw-thread ending of tapped blind hole at a distance from bottom hole；Transition, spiral shell are connected by the conical surface shaft shoulder between external thread section and stage casing
There is inner conical surface compatible with the shaft shoulder at the aperture of line blind hole；The changeover portion when external thread section and tapped blind hole cooperation are tightened
Front end face is contacted with the bottom hole of tapped blind hole.
Angle γ between the shaft shoulder and drill steel axis is 1~10 °, preferably 4 °.
The form of thread of tapped blind hole by the internal thread crest of linear, curved internal thread tooth bottom and one end with
Two sections of linear internal thread tooth sides that the tangent other end in internal thread tooth bottom is connect with internal thread crest are constituted；The spiral shell of external thread section
Line tooth form is by the external screw thread tooth bottom of linear, curved external screw thread crest and one end and the tangent other end in external screw thread top
Two sections of linear external screw thread tooth sides being connect with external screw thread tooth bottom are constituted；Wherein, internal thread tooth bottom and external screw thread crest are preferred
One section of curve on circular arc, ellipse, parabola or hyperbola, is preferably selected that section of curve corresponding to ellipse short shaft.
Compared with the prior art, therefore the present invention has many advantages, such as due to the above structure, and concrete analysis is such as
Under：
1）In the front end of drill steel external thread section, changeover portion, and the pricker when external thread section and tapped blind hole cooperation are tightened are set
The front end face of bar changeover portion is contacted with the bottom hole of tapped blind hole, therefore drill steel can pass through the front end face and tapped blind hole of the changeover portion
Bottom hole contact and transmit hitting power, the screw-thread fit face to can avoid traditional drilling tool is subject to the defect destroyed.
2）For relatively traditional drill steel, as a result of multidiameter structure and the drill steel stage casing that is relatively large in diameter and diameter compared with
The shaft shoulder connection transition of cone structure is used between small external thread section, therefore enhances the intensity of drill steel.
3）When external thread section and tapped blind hole cooperation are tightened, the front end face of drill steel changeover portion and the bottom hole of tapped blind hole connect
It touches but the conical surface shaft shoulder is not contacted with inner conical surface；Therefore positioning axially and radially will not all occur.Only when drill steel by
When Moment, the shaft shoulder is just contacted with inner conical surface, therefore can be avoided at drill steel external thread section ending due to by Moment
Fracture.
4）As a result of trapezoidal thread and it is similar to corrugated thread（Form of thread is in wavelike structure）What is be combined answers
Tooth form is closed, therefore the loading end of screw thread has both simultaneously that trapezoidal thread axial load resistant ability is strong, root of the tooth intensity is good and waveform spiral shell
The advantages that line bending resistance square performance is good.In addition, internal thread tooth bottom and external screw thread crest be all made of it is corresponding with ellipse short shaft
Curve（Radius of curvature is smaller）, therefore further increase the intensity of internal and external threads.
5）Due to eliminating escape, the diaper body wall thickness of tapped blind hole hole bottom does not reduce, therefore diaper body intensity is not
It reduces, will not be broken.
6）The shaft shoulder in impact process can also be overcome to be lacked with what diaper body easily sticked together using inner conical surface and the cooperation of the conical surface shaft shoulder
It falls into.
Description of the drawings
Fig. 1 is the structural schematic diagram of the present invention；
Fig. 2 is the structural schematic diagram of tapped blind hole tooth form；
Fig. 3 is the structural schematic diagram of drill steel external thread section tooth form.
In figure：Diaper body 1, bottom hole 1-1, tapped blind hole 1-2, inner conical surface 1-3, drill steel 2, external thread section 2-1, stage casing 2-2, axis
It is shoulder 2-3, changeover portion 2-4, front end face 2-5, internal thread crest 3, internal thread tooth side 4, internal thread tooth bottom 5, external screw thread pressure bottom 6, outer
Thread side 7, external screw thread crest 8.
Specific implementation mode
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings：
Embodiment 1
As shown in Figures 1 to 3：The diaper body 1 of bore bit is equipped with cylindrical tapped blind hole 1-2, and drill steel 2 is by being located at its leading portion
The external thread section 2-1 at position is connect with the tapped blind hole.Drill steel 2 is the multidiameter structure with stage casing 2-2, the outer spiral shell of drill steel 2
The front end of line section 2-1 has the cylindric changeover portion 2-4 that diameter is less than tapped blind hole 1-2, the length of the changeover portion to be less than or equal to
At the screw-thread ending of tapped blind hole 1-2 at a distance from bottom hole 1-1.In order to avoid stress concentration, external thread section 2-1 and stage casing 2-2
Between pass through the 2-3 connection transition of the conical surface shaft shoulder；Angle γ between 2 axis of shaft shoulder 2-3 and drill steel is 1~10 °, preferably 4 °.
In order to improve the bending strength at 2 external screw thread ending of drill steel, have at the aperture of tapped blind hole 1-2 in compatible with shaft shoulder 2-3
Conical surface 1-3.In order to avoid causing to interfere due to positioning because crossing, when external thread section 2-1 and tapped blind hole 1-2 coordinate the when of tightening to only have
The bottom hole 1-1 for crossing the front end face 2-5 and tapped blind hole 1-2 of section 2-4 is contacted, and the male cone (strobilus masculinus) of shaft shoulder 2-3 not with tapped blind hole
Inner conical surface 1-3 contacts at the apertures 1-2.
Embodiment 2
On the basis of the above embodiments, the present invention can also be used with lower structure：In order to improve the intensity of threaded connection,
The connection screw thread of drilling tool of the present invention uses by trapezoidal thread and is similar to corrugated thread（Form of thread is in wavelike structure）Xiang Jie
The compound thread of conjunction.I.e.：Internal thread crest 3 of the form of thread of tapped blind hole 1-2 by linear, curved internal thread tooth bottom
5 and two sections of 4 structures of linear internal thread tooth side being connect with internal thread crest 3 with the tangent other end in internal thread tooth bottom of one end
At；Correspondingly, the form of thread of external thread section 2-1 by the external screw thread tooth bottom 6 of linear, curved external screw thread crest 8 and
One end is constituted with two sections of linear external screw thread tooth sides 7 that the tangent other end in external screw thread top is connect with external screw thread tooth bottom 6.Wherein,
Internal thread tooth bottom 5 and external screw thread crest 8 either one section of circular arc, can also be on oval, parabola or hyperbola one
Section curve.In order to further increase the intensity of screw thread, internal thread tooth bottom 5 and external screw thread crest 8 are preferably with ellipse short shaft institute
Corresponding that section of curve.
Claims (6)
1. a kind of boring by percussion drilling tool includes the diaper body with cylindrical thread blind hole, the outer spiral shell by being located at leading portion position
The drill steel that line is connected with the tapped blind hole；It is characterized in that：Drill steel（2）To carry stage casing（2-2）Multidiameter structure；
External thread section（2-1）Front end have diameter be less than tapped blind hole（1-2）Cylindric changeover portion（2-4）, the length of the changeover portion
Less than or equal to tapped blind hole（1-2）Screw-thread ending at and bottom hole（1-1）Distance；External thread section（2-1）With stage casing（2-2）
Between pass through the conical surface shaft shoulder（2-3）Connect transition, tapped blind hole（1-2）Aperture at have inner conical surface compatible with the shaft shoulder
（1-3）；Work as external thread section（2-1）With tapped blind hole（1-2）Changeover portion when cooperation is tightened（2-4）Front end face（2-5）With screw thread
Blind hole（1-2）Bottom hole（1-1）Contact.
2. boring by percussion drilling tool according to claim 1, it is characterised in that：The shaft shoulder（2-3）With drill steel（2）Between axis
Angle γ be 1~10 °.
3. boring by percussion drilling tool according to claim 2, it is characterised in that：The angle γ is 4 °.
4. boring by percussion drilling tool according to claim 1 or 2 or 3, it is characterised in that：Tapped blind hole（1-2）Screw thread
Tooth form by linear internal thread crest（3）, curved internal thread tooth bottom（5）And one end and the internal thread tooth bottom it is tangent
The other end and internal thread crest（3）Two sections of linear internal thread tooth sides of connection（4）It constitutes；External thread section（2-1）Thread
Type by linear external screw thread tooth bottom（6）, curved external screw thread crest（8）And one end and the external screw thread top it is tangent another
End and external screw thread tooth bottom（6）Two sections of linear external screw thread tooth sides of connection（7）It constitutes.
5. boring by percussion drilling tool according to claim 4, it is characterised in that：Internal thread tooth bottom（5）And external screw thread tooth
Top（8）For one section of curve on circular arc, ellipse, parabola or hyperbola.
6. boring by percussion drilling tool according to claim 5, it is characterised in that：Internal thread tooth bottom（5）And external screw thread tooth
Top（8）For that section of curve corresponding to ellipse short shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610738344.1A CN106150395B (en) | 2016-08-29 | 2016-08-29 | Boring by percussion drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610738344.1A CN106150395B (en) | 2016-08-29 | 2016-08-29 | Boring by percussion drilling tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106150395A CN106150395A (en) | 2016-11-23 |
| CN106150395B true CN106150395B (en) | 2018-08-17 |
Family
ID=57342406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610738344.1A Active CN106150395B (en) | 2016-08-29 | 2016-08-29 | Boring by percussion drilling tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106150395B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107386992B (en) * | 2017-09-01 | 2023-04-25 | 贵州迈锐钻探设备制造有限公司 | Surface mining drill tool assembly and surface mining drill tool |
| CN108590541A (en) * | 2018-05-04 | 2018-09-28 | 贵州迈锐钻探设备制造有限公司 | Drill bit assembly and driving rock drill |
| CN114364860A (en) * | 2019-10-11 | 2022-04-15 | 山特维克矿山工程机械工具股份有限公司 | Shoulder protected drilling assembly |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6767156B1 (en) * | 1999-11-26 | 2004-07-27 | Sandvik Ab | Thread joint and threaded components for percussive drilling components |
| CN101067365A (en) * | 2007-05-30 | 2007-11-07 | 李明锁 | Improved screw connection drill rod |
| CN202348143U (en) * | 2011-12-15 | 2012-07-25 | 山东明珠石油装备制造有限公司 | Novel drill rod joint thread |
| CN103216197A (en) * | 2013-04-28 | 2013-07-24 | 江苏曙光石油钻采设备有限公司 | Fast-rotation type oil drill rod joint thread reinforcing structure |
| CN203114190U (en) * | 2013-03-20 | 2013-08-07 | 湖南有色重型机器有限责任公司 | Rock drilling drill stem |
| CN205918370U (en) * | 2016-08-29 | 2017-02-01 | 贵州捷盛钻具股份有限公司 | Impacted style rock drilling brazing tool |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE0402026L (en) * | 2004-08-17 | 2006-01-17 | Sandvik Intellectual Property | Rock drill bit and threaded connection for striking rock drilling |
-
2016
- 2016-08-29 CN CN201610738344.1A patent/CN106150395B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6767156B1 (en) * | 1999-11-26 | 2004-07-27 | Sandvik Ab | Thread joint and threaded components for percussive drilling components |
| CN101067365A (en) * | 2007-05-30 | 2007-11-07 | 李明锁 | Improved screw connection drill rod |
| CN202348143U (en) * | 2011-12-15 | 2012-07-25 | 山东明珠石油装备制造有限公司 | Novel drill rod joint thread |
| CN203114190U (en) * | 2013-03-20 | 2013-08-07 | 湖南有色重型机器有限责任公司 | Rock drilling drill stem |
| CN103216197A (en) * | 2013-04-28 | 2013-07-24 | 江苏曙光石油钻采设备有限公司 | Fast-rotation type oil drill rod joint thread reinforcing structure |
| CN205918370U (en) * | 2016-08-29 | 2017-02-01 | 贵州捷盛钻具股份有限公司 | Impacted style rock drilling brazing tool |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106150395A (en) | 2016-11-23 |
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