CN106089115B - Impact type taper thread connects drill rod - Google Patents
Impact type taper thread connects drill rod Download PDFInfo
- Publication number
- CN106089115B CN106089115B CN201610738333.3A CN201610738333A CN106089115B CN 106089115 B CN106089115 B CN 106089115B CN 201610738333 A CN201610738333 A CN 201610738333A CN 106089115 B CN106089115 B CN 106089115B
- Authority
- CN
- China
- Prior art keywords
- blind hole
- tapped blind
- hole
- drill rod
- impact type
- 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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Links
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 33
- 239000010959 steel Substances 0.000 claims abstract description 33
- 238000005553 drilling Methods 0.000 abstract description 13
- 238000009527 percussion Methods 0.000 abstract description 4
- 241001391944 Commicarpus scandens Species 0.000 abstract 1
- 230000013011 mating Effects 0.000 abstract 1
- 230000007704 transition Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 238000003754 machining Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process 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)
- Earth Drilling (AREA)
Abstract
The invention discloses a kind of impact type taper threads to connect drill rod, belongs to boring by percussion drilling tool；It is intended to provide a kind of diaper body and drill steel boring by percussion drilling tool with long service life.It includes the diaper body for being threaded blind hole, by the drill steel of external thread section and blind hole mating connection, tapped blind hole（1‑2）Bottom outlet be taper hole；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；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, have the characteristics that handling ease, service life are long；It is a kind of improved structure of drill rod.
Description
Technical field
The present invention relates to a kind of boring by percussion drilling tools more particularly to a kind of impact type taper thread to connect drill rod.
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 right angle end face（Or internal thread end face）Discontinuity
When, the impact force of transmission（The Main Load transmitted for combiner）The degree that stress raisers can further be increased, leads
Cause failure in the part 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 impact type taper thread connects rock drilling
Drilling tool, it not only can avoid diaper body and fracture occur in tapped blind hole hole bottom but also can also prevent drill steel at outer screw-thread ending
It is broken, to effectively improve the drilling tool service life.
To achieve the goals above, the present invention uses following technical scheme：It includes the diaper body for being threaded blind hole, passes through
It is located at the drill steel that the external screw thread at leading portion position is connected with the tapped blind hole；The bottom outlet of tapped blind hole is taper hole, the bottom outlet
Busbar and the bottom outlet axis between angle β be 1~10 °, preferably 5 °；It is blind that the front end of external thread section has diameter to be less than screw thread
The length of the cylindric changeover portion of hole smallest cross-sectional diameter, the changeover portion is less than or equal at the screw-thread ending of tapped blind hole and hole
The distance at bottom, when external thread section is tightened with tapped blind hole cooperation, the front end face of changeover portion is contacted with the bottom hole of tapped blind hole.
Drill steel is the multidiameter structure with stage casing, and 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；Angle γ between the shaft shoulder and drill steel axis is 1~10 °, excellent
It is selected as 4 °.
There is escape between tapped blind hole and bottom hole.
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 with taper tapped blind hole, increase the diaper body wall thickness of tapped blind hole hole bottom, therefore move back
Diaper body intensity at cutter groove does not weaken, and will not be broken.
5）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.
In figure：Diaper body 1, bottom hole 1-1, tapped blind hole 1-2, inner conical surface 1-3, escape 1-4, drill steel 2, external thread section 2-1,
Stage casing 2-2, shaft shoulder 2-3, changeover portion 2-4, front end face 2-5.
Specific implementation mode
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings：
Embodiment 1
As shown in Figure 1：The diaper body 1 of bore bit is equipped with taper thread blind hole 1-2, and drill steel 2 is by being located at its leading portion position
External thread section 2-1 is connect with the tapped blind hole；Angle β between the bottom outlet busbar of tapped blind hole 1-2 and the bottom outlet axis is 1
~10 °, preferably 5 °.There is the cylindric transition that diameter is less than tapped blind hole 1-2 smallest cross-sectional diameters in the front end of external thread section 2-1
The length of section 2-4, the changeover portion are less than or equal at the screw-thread ending of tapped blind hole 1-2 at a distance from bottom hole 1-1；Work as external screw thread
When section 2-1 is tightened with tapped blind hole 1-2 cooperations, the bottom hole 1-1 of the front end face 2-5 and tapped blind hole 1-2 of changeover portion 2-4 are contacted.
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 drill steel 2, pricker
Bar 2 is using the multidiameter structure with stage casing 2-2；In order to avoid generating stress concentration, between external thread section 2-1 and stage casing 2-2
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
The bending strength at 2 external screw thread ending of drill steel is improved, has inner conical surface compatible with shaft shoulder 2-3 at the aperture of tapped blind hole 1-2
1-3.When external thread section 2-1 and tapped blind hole 1-2 cooperations are tightened, the only front end face 2-5 of changeover portion 2-4 and tapped blind hole 1-
2 bottom hole 1-1 is contacted and the male cone (strobilus masculinus) of shaft shoulder 2-3 is not contacted with the inner conical surface 1-3 at the apertures tapped blind hole 1-2；It therefore can
It avoided positioning and forming interference.
For the ease of machining internal thread, escape 1-4 is equipped between tapped blind hole 1-2 and bottom hole 1-1.
Claims (7)
1. a kind of impact type taper thread connects drill rod, including is threaded the diaper body of blind hole, by being located at leading portion position
The drill steel that is connected of external screw thread and the tapped blind hole；It is characterized in that：Tapped blind hole（1-2）Bottom outlet be taper hole, should
Angle β between the busbar of bottom outlet and the bottom outlet axis is 1~10 °；External thread section（2-1）Front end have diameter be less than screw thread it is blind
Hole（1-2）The cylindric changeover portion of smallest cross-sectional diameter（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, 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.
2. impact type taper thread according to claim 1 connects drill rod, it is characterised in that：The angle β is 5 °.
3. impact type taper thread according to claim 1 or 2 connects drill rod, it is characterised in that：Drill steel（2）For band
There is stage casing（2-2）Multidiameter structure, external thread section（2-1）With stage casing（2-2）Between pass through the conical surface shaft shoulder（2-3）It connected
It crosses, tapped blind hole（1-2）Aperture at have inner conical surface compatible with the shaft shoulder（1-3）；The shaft shoulder（2-3）With drill steel（2）Axis
Between angle γ be 1~10 °.
4. impact type taper thread according to claim 3 connects drill rod, it is characterised in that：The angle γ is
4°。
5. impact type taper thread according to claim 1 or 2 connects drill rod, it is characterised in that：Tapped blind hole（1-
2）With bottom hole（1-1）Between have escape（1-4）.
6. impact type taper thread according to claim 3 connects drill rod, it is characterised in that：Tapped blind hole（1-2）
With bottom hole（1-1）Between have escape（1-4）.
7. impact type taper thread according to claim 4 connects drill rod, it is characterised in that：Tapped blind hole（1-2）
With bottom hole（1-1）Between have escape（1-4）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610738333.3A CN106089115B (en) | 2016-08-29 | 2016-08-29 | Impact type taper thread connects drill rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610738333.3A CN106089115B (en) | 2016-08-29 | 2016-08-29 | Impact type taper thread connects drill rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106089115A CN106089115A (en) | 2016-11-09 |
| CN106089115B true CN106089115B (en) | 2018-08-17 |
Family
ID=57226041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610738333.3A Active CN106089115B (en) | 2016-08-29 | 2016-08-29 | Impact type taper thread connects drill rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106089115B (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 |
| CN110977343A (en) * | 2019-11-29 | 2020-04-10 | 安庆中船动力配套有限公司 | Processing technology of threaded blind hole of connecting rod body |
| CN114633218B (en) * | 2022-03-04 | 2023-09-19 | 贵州捷盛钻具股份有限公司 | Surface treatment method and device for drill rod and drill rod manufacturing method |
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 |
| CN205918371U (en) * | 2016-08-29 | 2017-02-01 | 贵州捷盛钻具股份有限公司 | Impacted style tapering threaded connection 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 CN201610738333.3A patent/CN106089115B/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 |
| CN205918371U (en) * | 2016-08-29 | 2017-02-01 | 贵州捷盛钻具股份有限公司 | Impacted style tapering threaded connection rock drilling brazing tool |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106089115A (en) | 2016-11-09 |
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