CN107905736A - A kind of floating type anti-well bores machine bit - Google Patents
A kind of floating type anti-well bores machine bit Download PDFInfo
- Publication number
- CN107905736A CN107905736A CN201711123925.5A CN201711123925A CN107905736A CN 107905736 A CN107905736 A CN 107905736A CN 201711123925 A CN201711123925 A CN 201711123925A CN 107905736 A CN107905736 A CN 107905736A
- Authority
- CN
- China
- Prior art keywords
- floating
- hobboing cutter
- connecting shaft
- tool apron
- laterally
- 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.)
- Granted
Links
- 238000007667 floating Methods 0.000 title claims abstract description 143
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims 1
- 239000011435 rock Substances 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 7
- 230000003321 amplification Effects 0.000 description 5
- 238000003199 nucleic acid amplification method Methods 0.000 description 5
- 238000005553 drilling Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 231100000241 scar Toxicity 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 238000005194 fractionation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003466 welding 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
- 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
-
- 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
- E21B10/62—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable
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)
- Earth Drilling (AREA)
Abstract
The invention discloses a kind of floating type anti-well to bore machine bit, including cutterhead, tool apron, floating hobboing cutter, connecting shaft, laterally floating spring；The tool apron takes the shape of the letter U structure；The tool apron is fixed on cutterhead；The tool apron and floating hobboing cutter is equipped with multiple；The floating hobboing cutter is installed in tool apron；The connecting shaft both ends are installed on both sides inside tool apron；The floating hobboing cutter is rotated and is socketed in connecting shaft；Flying height is equipped between the both sides of floating hobboing cutter and the inner side of tool apron；The laterally floating spring is equipped with multiple；Two laterally floating springs are socketed in the both ends of connecting shaft respectively；Two laterally floating springs are distributed in the both sides of floating hobboing cutter；Between the laterally floating spring is resilient compressive state on the inside of floating hobboing cutter sidepiece and tool apron.Laterally it is greatly improved so as to which the present invention realizes with vertical double floating effects, the floating for adding floating hobboing cutter 3 from correction ability, efficiency of breaking rock.
Description
Technical field
The present invention relates to anti-well drilling machine, the drill bit of more particularly to floating type anti-well drilling machine.
Background technology
At present, anti-well drilling machine is mainly used in hydroelectric project vertical shaft, inclined shaft, surge shaft, ventilation shaft and gully, railway
Construction ventilation well and mine slip slag well etc. industry.Drill bit in anti-well drilling machine is most important component in whole mechanism, one
As fix multiple hobboing cutters on drill bit, carry out broken rock to outside by multiple hobboing cutters, the effect of the distribution of hobboing cutter and structure for broken rock
Rate and stability have a great impact, and existing hobboing cutter is all integrally fixed at the mode rolled on tool apron and carries out broken rock, still
Sometimes often the bearing surface of hobboing cutter lateral surface and rock is misfitted, and causing hobboing cutter, some fails to be made full use of, into
And result in that efficiency of breaking rock is low, energy consumption is of high cost, how by hobboing cutter lateral surface and broken rock face coincide abuts into this hair
Bright announcement emphasis.
The content of the invention
In view of the above shortcomings of the prior art part, the present invention solve the problems, such as be：A kind of hobboing cutter lateral surface is provided and is broken
The coincide floating type anti-well of abutting of scar bores machine bit.
To solve the above problems, the technical solution that the present invention takes is as follows：
A kind of floating type anti-well bores machine bit, including cutterhead, tool apron, floating hobboing cutter, connecting shaft, laterally floating spring；It is described
Tool apron take the shape of the letter U structure；The tool apron is fixed on cutterhead；The tool apron and floating hobboing cutter is equipped with multiple；Described
Floating hobboing cutter is installed in tool apron；The connecting shaft both ends are installed on both sides inside tool apron；The floating hobboing cutter turning set
It is connected in connecting shaft；Flying height is equipped between the both sides of floating hobboing cutter and the inner side of tool apron；The laterally floating
Spring is equipped with multiple；Two laterally floating springs are socketed in the both ends of connecting shaft respectively；Two laterally floatings
Spring is distributed in the both sides of floating hobboing cutter；The laterally floating spring be resilient compressive state installed in floating hobboing cutter sidepiece and
Between on the inside of tool apron.
Further, the cylindrical structure of floating hobboing cutter；The floating hobboing cutter is axially arranged with connection through hole；Described
Floating hobboing cutter is socketed in connecting shaft by connecting through hole；The diameter of the connection through hole is more than the diameter of connecting shaft.
Further, multiple axial card slots are uniformly provided with the floating hobboing cutter of the connection through hole surrounding；The axial direction
Card slot it is closed at both ends；Vertical floating spring is connected with the axial card slot；The sidepiece bullet of the vertical floating spring
Property is pressed on connecting shaft sidepiece.
Further, the section semicircular in shape structure of the axial card slot.
Further, the both ends of the floating hobboing cutter are equipped with annular slot；The end of the laterally floating spring is caught in
In annular slot；The internal diameter of the annular slot is more than the diameter of connection through hole.
Further, the side of the tool apron is equipped with swivel plate, opposite side is equipped with fixed plate, bottom is positioning plate；It is described
Swivel plate on the inside of be equipped with threaded hole；Jack hole is equipped with the inside of the fixed plate；The one end of the connecting shaft is equipped with external screw thread
End；The one end of the connecting shaft is threaded in the threaded hole of swivel plate by male end；The connecting shaft it is another
End is plugged in the jack hole of fixed plate；The swivel plate is fixed on positioning plate by locking screw.
Further, the connecting shaft is made of alloy steel material.
Beneficial effects of the present invention
1. the present invention changes the connection structure between traditional hobboing cutter and tool apron, the both sides of floating hobboing cutter and the inner side of tool apron it
Between be equipped with flying height, floating hobboing cutter is socketed in connecting shaft, and the connecting shaft in flying height is equipped with laterally floating bullet
Spring, in this way, the floating hobboing cutter of the present invention carries out, from correction position, passing through the flying height of floating hobboing cutter both sides first in broken rock
The lateral position of floating hobboing cutter is adjusted, laterally floating spring can ensure the stability of floating hobboing cutter laterally floating, so as to reach this
Invention floating hobboing cutter carries out the effect of laterally floating so that floating hobboing cutter abuts broken rock face in lateral position.
2. the present invention changes traditional connecting shaft and the connection structure of hobboing cutter, the connection through hole on floating hobboing cutter of the present invention
Diameter be more than the diameter of connecting shaft so that floating hobboing cutter leaves floating space on axial location, add floating rolling
Correction floating effect of the knife in axial location；For the hobboing cutter that floats, smoothly correction is floated in the axial direction, and the present invention is logical in connection
Multiple axial card slots are uniformly provided with the floating hobboing cutter of hole surrounding；Vertical floating spring is connected with axial card slot, by vertical
The lateral elastic of floating spring is pressed on connecting shaft sidepiece, so that realizing smoothly elasticity between floating hobboing cutter and connecting shaft
It is flexible coupling so that floating hobboing cutter fluctuates in vertical direction spatial.
Brief description of the drawings
Fig. 1 is schematic structural view of the invention.
Fig. 2 is floating hobboing cutter of the present invention, connecting rod, the amplification overlooking the structure diagram of vertical floating spring.
Fig. 3 is the amplification cross-sectional view of floating hobboing cutter of the present invention.
Fig. 4 is the amplification fractionation structural representation of tool apron of the present invention and connecting shaft.
Fig. 5 is the amplification axial slices figure of the floating hobboing cutter of the present invention.
Fig. 6 is the amplification assembling structure schematic diagram of tool apron of the present invention and connecting shaft.
Embodiment
Present invention is described in further detail below in conjunction with the accompanying drawings.
As shown in Figure 1, a kind of floating type anti-well bores machine bit, including cutterhead 1, tool apron 2, floating hobboing cutter 3, connecting shaft 4,
Laterally floating spring 5.Tool apron 2 takes the shape of the letter U structure, can be made of metal material the latter's high molecular material.Tool apron 2 is fixed on cutterhead 1
On, it can be fixed by welding or screw and nut.Tool apron 2 and floating hobboing cutter 3 be equipped with it is multiple, can according to practice of construction situation into
Row limits number.Floating hobboing cutter 3 is installed in tool apron 2.4 both ends of connecting shaft are installed on 2 inside both sides of tool apron, and connecting shaft 4 is by closing
The strength character that can ensure connecting shaft 4 is made in golden Steel material.The floating hobboing cutter 3 is rotated and is socketed in connecting shaft 4.Described
Flying height 7 is equipped between the both sides of floating hobboing cutter 3 and the inner side of tool apron 2.The laterally floating spring 4 is equipped with multiple.Institute
The two laterally floating springs 5 stated are socketed in the both ends of connecting shaft 4 respectively.Two laterally floating springs 5 are distributed in floating
The both sides of dynamic hobboing cutter 3.The laterally floating spring 5 is resilient compressive state installed in 3 sidepiece of floating hobboing cutter and the inner side of tool apron 2
Between.Further preferably, the 3 cylindrical structure of floating hobboing cutter.As shown in Fig. 2,3,5, the floating hobboing cutter 3 is axial to be set
There is connection through hole 31.The floating hobboing cutter 3 is socketed in connecting shaft 4 by connecting through hole 31.The connection through hole 31
Diameter is more than the diameter of connecting shaft 4.Further preferably, it is uniformly provided with the floating hobboing cutter 3 of connection 31 surrounding of through hole more
A axial direction card slot 33.The axial card slot 33 it is closed at both ends.Vertical floating spring is connected with the axial card slot 33
6.The lateral elastic of the vertical floating spring 6 is pressed on 4 sidepiece of connecting shaft.Further preferably, the axial card slot 33
Section semicircular in shape structure.Further preferably, for the ease of the connection stationarity of laterally floating spring 5 and floating hobboing cutter 3, institute
The both ends for the floating hobboing cutter 3 stated are equipped with annular slot 32.The end of the laterally floating spring 5 is caught in annular slot 32.
The internal diameter of the annular slot 32 is more than the diameter of connection through hole 31.Further preferably, it is floating for the ease of connecting shaft 4 and laterally
Move the installation of spring 5, as shown in figs. 4 and 6, the side of the tool apron 2 is equipped with swivel plate 22, opposite side is equipped with fixed plate 23,
Bottom is positioning plate 21.The inner side of swivel plate 22 is equipped with threaded hole 221.The inner side of fixed plate 23 is equipped with jack hole
231.Described 4 one end of connecting shaft is equipped with male end 41.Described 4 one end of connecting shaft is threaded in by male end 41
In the threaded hole 221 of swivel plate 22.The other end of the connecting shaft 4 is plugged in the jack hole 231 of fixed plate 23.Described
Swivel plate 22 is fixed on positioning plate 21 by locking screw 222.
The present invention changes the connection structure between traditional hobboing cutter and tool apron, in the both sides of floating hobboing cutter 3 and tool apron 2
Flying height 7 is equipped between side, floating hobboing cutter 3 is socketed in connecting shaft 4, and the connecting shaft 4 in flying height 7 is equipped with horizontal stroke
To floating spring 5, in this way, the floating hobboing cutter 3 of the present invention is carried out from correction position first in broken rock, by 3 liang of floating hobboing cutter
The flying height 7 of side adjusts the lateral position of floating hobboing cutter 3, and laterally floating spring 5 can ensure the steady of 3 laterally floating of floating hobboing cutter
It is qualitative, so as to reach the effect that floating hobboing cutter 3 of the present invention carries out laterally floating so that floating hobboing cutter 3 abuts broken in lateral position
Scar.The present invention changes traditional connecting shaft 4 and the connection structure of hobboing cutter, the connection through hole 31 on floating hobboing cutter 3 of the present invention
Diameter be more than connecting shaft 4 diameter so that floating hobboing cutter 3 leaves floating space on axial location, add floating
Correction floating effect of the hobboing cutter 3 in axial location；For the hobboing cutter 3 that floats, smoothly correction is floated in the axial direction, and the present invention is even
Connect in the floating hobboing cutter 3 of 31 surrounding of hole and be uniformly provided with multiple axial card slots 33.33 are connected with vertical floating bullet in axial card slot
Spring 6,4 sidepiece of connecting shaft is pressed on by the lateral elastic of vertical floating spring 6 so that floating hobboing cutter 3 and connecting shaft 3 it
Between realize that stable elasticity is flexible coupling so that floating hobboing cutter 3 fluctuates in vertical direction spatial.So as to which the present invention realizes horizontal stroke
To with vertical double floating effects, the floating for adding floating hobboing cutter 3 is greatly improved from correction ability, efficiency of breaking rock.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on, should all be included in the protection scope of the present invention god.
Claims (7)
1. a kind of floating type anti-well bores machine bit, it is characterised in that including cutterhead, tool apron, floating hobboing cutter, connecting shaft, transverse direction
Floating spring；The tool apron takes the shape of the letter U structure；The tool apron is fixed on cutterhead；The tool apron and floating hobboing cutter is all provided with
Have multiple；The floating hobboing cutter is installed in tool apron；The connecting shaft both ends are installed on both sides inside tool apron；Described is floating
Dynamic hobboing cutter, which rotates, to be socketed in connecting shaft；Flying height is equipped between the both sides of floating hobboing cutter and the inner side of tool apron；Institute
The laterally floating spring stated is equipped with multiple；Two laterally floating springs are socketed in the both ends of connecting shaft respectively；Described
Two laterally floating springs are distributed in the both sides of floating hobboing cutter；The laterally floating spring is resilient compressive state installed in floating
Between on the inside of dynamic hobboing cutter sidepiece and tool apron.
2. floating type anti-well according to claim 1 bores machine bit, it is characterised in that the floating hobboing cutter is cylindrical
Structure；The floating hobboing cutter is axially arranged with connection through hole；The floating hobboing cutter is socketed in connecting shaft by connecting through hole；
The diameter of the connection through hole is more than the diameter of connecting shaft.
3. floating type anti-well according to claim 2 bores machine bit, it is characterised in that the connection through hole surrounding
Multiple axial card slots are uniformly provided with floating hobboing cutter；The axial card slot it is closed at both ends；Clamping in the axial card slot
There is vertical floating spring；The lateral elastic of the vertical floating spring is pressed on connecting shaft sidepiece.
4. floating type anti-well according to claim 3 bores machine bit, it is characterised in that the section of the axial card slot
Semicircular in shape structure.
5. floating type anti-well according to claim 2 bores machine bit, it is characterised in that the both ends of the floating hobboing cutter
Equipped with annular slot；The end of the laterally floating spring is caught in annular slot；The internal diameter of the annular slot is more than
Connect the diameter of through hole.
6. floating type anti-well according to claim 1 bores machine bit, it is characterised in that the side of the tool apron is equipped with
Swivel plate, opposite side are equipped with fixed plate, bottom is positioning plate；Threaded hole is equipped with the inside of the swivel plate；The fixed plate
Inner side is equipped with jack hole；The one end of the connecting shaft is equipped with male end；The one end of the connecting shaft passes through male end screw thread
It is connected in the threaded hole of swivel plate；The other end of the connecting shaft is plugged in the jack hole of fixed plate；The rotation
Plate is fixed on positioning plate by locking screw.
7. floating type anti-well according to claim 1 bores machine bit, it is characterised in that the connecting shaft is by steel alloy
Material is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711123925.5A CN107905736B (en) | 2017-11-14 | 2017-11-14 | A kind of floating type anti-well brill machine bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711123925.5A CN107905736B (en) | 2017-11-14 | 2017-11-14 | A kind of floating type anti-well brill machine bit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107905736A true CN107905736A (en) | 2018-04-13 |
| CN107905736B CN107905736B (en) | 2019-09-03 |
Family
ID=61845440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711123925.5A Active CN107905736B (en) | 2017-11-14 | 2017-11-14 | A kind of floating type anti-well brill machine bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107905736B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109184577A (en) * | 2018-11-06 | 2019-01-11 | 江苏和信石油机械有限公司 | A kind of anti-well drilling machine of plug-in |
| CN109252811A (en) * | 2018-11-06 | 2019-01-22 | 江苏和信石油机械有限公司 | A kind of anti-well drilling machine of floating interval-adjustable |
| CN109538114A (en) * | 2018-11-06 | 2019-03-29 | 江苏和信石油机械有限公司 | A kind of anti-well drilling machine of attaching type |
| CN110295845A (en) * | 2019-04-29 | 2019-10-01 | 江苏和信石油机械有限公司 | A kind of anti-well drilling machine of automatic drive type |
| CN111577192A (en) * | 2020-04-10 | 2020-08-25 | 中煤科工集团西安研究院有限公司 | Orifice pressure-bearing sealing device for underground coal mine water prevention and control composite directional drilling |
| CN112792018A (en) * | 2021-02-04 | 2021-05-14 | 北京英斯派克科技有限公司 | Cleaning tool and cleaning method for carbon electrode surface |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3993147A (en) * | 1976-01-19 | 1976-11-23 | Dresser Industries, Inc. | Taper lock removable stem for raise bit |
| US4114698A (en) * | 1975-02-20 | 1978-09-19 | Smith International, Inc. | Method and apparatus for tunneling upwardly |
| CN106761431A (en) * | 2017-01-11 | 2017-05-31 | 四川金占机械制造有限责任公司 | A kind of anti-well rock stratum inserted tooth hob drill bit |
| CN206477800U (en) * | 2017-02-16 | 2017-09-08 | 南昌力通岩土工程设备有限公司 | A kind of novel trans well bores hobboing cutter |
| CN206522105U (en) * | 2017-07-19 | 2017-09-26 | 四川金占机械制造有限责任公司 | A kind of inserted tooth hob drill bit of efficient rock-breaking |
-
2017
- 2017-11-14 CN CN201711123925.5A patent/CN107905736B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4114698A (en) * | 1975-02-20 | 1978-09-19 | Smith International, Inc. | Method and apparatus for tunneling upwardly |
| US3993147A (en) * | 1976-01-19 | 1976-11-23 | Dresser Industries, Inc. | Taper lock removable stem for raise bit |
| CN106761431A (en) * | 2017-01-11 | 2017-05-31 | 四川金占机械制造有限责任公司 | A kind of anti-well rock stratum inserted tooth hob drill bit |
| CN206477800U (en) * | 2017-02-16 | 2017-09-08 | 南昌力通岩土工程设备有限公司 | A kind of novel trans well bores hobboing cutter |
| CN206522105U (en) * | 2017-07-19 | 2017-09-26 | 四川金占机械制造有限责任公司 | A kind of inserted tooth hob drill bit of efficient rock-breaking |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109184577A (en) * | 2018-11-06 | 2019-01-11 | 江苏和信石油机械有限公司 | A kind of anti-well drilling machine of plug-in |
| CN109252811A (en) * | 2018-11-06 | 2019-01-22 | 江苏和信石油机械有限公司 | A kind of anti-well drilling machine of floating interval-adjustable |
| CN109538114A (en) * | 2018-11-06 | 2019-03-29 | 江苏和信石油机械有限公司 | A kind of anti-well drilling machine of attaching type |
| CN110295845A (en) * | 2019-04-29 | 2019-10-01 | 江苏和信石油机械有限公司 | A kind of anti-well drilling machine of automatic drive type |
| CN111577192A (en) * | 2020-04-10 | 2020-08-25 | 中煤科工集团西安研究院有限公司 | Orifice pressure-bearing sealing device for underground coal mine water prevention and control composite directional drilling |
| CN112792018A (en) * | 2021-02-04 | 2021-05-14 | 北京英斯派克科技有限公司 | Cleaning tool and cleaning method for carbon electrode surface |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107905736B (en) | 2019-09-03 |
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