CN108915602B - Double-layer dust-absorbing drill bit - Google Patents
Double-layer dust-absorbing drill bit Download PDFInfo
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- CN108915602B CN108915602B CN201810757852.3A CN201810757852A CN108915602B CN 108915602 B CN108915602 B CN 108915602B CN 201810757852 A CN201810757852 A CN 201810757852A CN 108915602 B CN108915602 B CN 108915602B
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- drill bit
- annular flange
- gear ring
- rod
- upper annular
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- 238000007789 sealing Methods 0.000 claims description 15
- 239000000428 dust Substances 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 3
- 239000011435 rock Substances 0.000 abstract description 13
- 230000005641 tunneling Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 2
- 239000012634 fragment Substances 0.000 description 8
- 239000010410 layer Substances 0.000 description 8
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000002355 dual-layer Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 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
- E21B10/42—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
A double-layer dust-absorbing drill bit comprises an inner drill bit, an outer drill bit, a front drill rod, a sleeve, a hollow drill rod and a planet wheel. The sleeve is sleeved outside the hollow drill rod, the inner drill bit is conical, and the outer drill bit is annular. The inner drill bit is positioned in the middle of the outer drill bit, and the front end of the inner drill bit does not exceed the front end of the outer drill bit. The inner drill bit is fixed at the front end of the front drill rod, the tail end of the front drill rod is provided with a cross rod, and the cross rod is fixed on the inner wall of the front end of the hollow drill rod. An inner gear ring is arranged on the inner wall of the tail end of the outer drill bit, an outer gear ring is arranged on the outer wall of the front end of the hollow drill rod, and the inner gear ring, the planet wheel and the outer gear ring form a planet wheel train. The double-layer dust-absorbing drill bit is characterized in that the periphery of the inner drill bit is also provided with the annular outer drill bit, in the tunneling process, the outer drill bit firstly cuts a circular weak face on a rock body, the inner drill bit then crushes the weak face, the inner drill bit and the outer drill bit act together, the tunneling efficiency is higher, and the pore-forming quality is high; the inner drill bit and the outer drill bit gradually narrow from front to back, and cannot be blocked.
Description
Technical Field
The invention relates to a dust-absorbing drill bit, in particular to a double-layer dust-absorbing drill bit.
Background
The dust-absorbing drill bit is a drill bit which can convey fragments of a broken rock body to the outside of a drill hole through a hollow drill rod at the rear end of the drill bit. Patent CN2013103218973 discloses a reverse-spiral dust-collecting drill bit, which conveys broken pieces to a bell mouth at the rear end of the drill bit through blades rotating in a reverse spiral manner, and then conveys the broken pieces out through a channel at the rear end of the bell mouth. The dust-absorbing drill bit is generally only suitable for soft rock strata, and when larger fragments exist in the rock strata, the horn mouth is easily blocked, so that a conveying channel is blocked.
Disclosure of Invention
The invention aims to provide a double-layer dust-absorbing drill bit which can perform secondary crushing on a rock block to prevent the rock block from blocking a channel in the drill bit.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
a double-layer dust-absorption drill bit comprises an inner drill bit, an outer drill bit, a front drill rod, a sleeve, a hollow drill rod and a planet wheel, wherein the sleeve is sleeved outside the hollow drill rod, and the front end of the hollow drill rod extends out of the sleeve; the inner drill bit is conical, and spiral blades are distributed on the conical surface of the inner drill bit; the outer drill bit is circular, and the front end of the outer drill bit is provided with a sawtooth-shaped blade; the inner drill bit is positioned in the middle of the outer drill bit, and the front end of the inner drill bit does not exceed the front end of the outer drill bit; the inner drill bit is fixed at the front end of the front drill rod, the tail end of the front drill rod is provided with a cross rod, and the cross rod is fixed on the inner wall of the front end of the hollow drill rod; an inner gear ring is arranged on the inner wall of the tail end of the outer drill bit, an outer gear ring is arranged on the outer wall of the front end of the hollow drill rod, more than 2 planet gears are positioned between the inner gear ring and the outer gear ring, and the inner gear ring, the planet gears and the outer gear ring form a planet gear train; the inner wall of the outer drill bit is provided with a first upper annular flange and a first lower annular flange, the first upper annular flange is positioned above the inner gear ring, the first lower annular flange is positioned below the inner gear ring, the outer wall of the front end of the hollow drill rod is provided with a second upper annular flange and a second lower annular flange, the second upper annular flange is positioned above the outer gear ring, the second lower annular flange is positioned below the outer gear ring, the first upper annular flange is opposite to the second upper annular flange, the first lower annular flange is opposite to the second lower annular flange, the planet wheel is clamped in a shell formed by the first upper annular flange, the first lower annular flange, the second upper annular flange and the second lower annular flange, the upper end of a wheel shaft of the planet wheel is clamped between the first upper annular flange and the second upper annular flange, and the lower end of the wheel shaft of the planet wheel is clamped between the first lower annular flange and the second lower annular flange; the tail end of the wheel shaft of the planet wheel extends out of the lower surfaces of the first lower annular flange and the second lower annular flange and is fixed on the front end of the sleeve.
Furthermore, the number of the planet wheels is 4, and the 4 planet wheels are distributed in a gap between the inner gear ring and the outer gear ring at equal intervals.
Furthermore, the two groups of cross rods are distributed in parallel.
Further, still include the sealing ring piece, the inner edge of sealing ring piece pastes the outer wall of tight hollow drill pipe, and the outer fringe of sealing ring piece pastes the inner wall of tight outer drill bit, and the lower surface of sealing ring piece pastes with the upper surface of first annular flange on the second mutually, and the upper end of shaft stretches out the upper surface of first annular flange on the second and blocks on the sealing ring piece.
Compared with the prior art, the invention has the beneficial effects that: the double-layer dust-absorbing drill bit is characterized in that the periphery of the inner drill bit is also provided with the annular outer drill bit, in the tunneling process, the outer drill bit firstly cuts a circular weak face on a rock body, the inner drill bit then crushes the weak face, the inner drill bit and the outer drill bit act together, the tunneling efficiency is higher, and the pore-forming quality is high; the inner drill bit and the outer drill bit gradually narrow from front to back, and broken rock fragments of the inner drill bit after rock breaking can be crushed secondarily between the inner drill bit and the outer drill bit if the size of the broken rock fragments is large, so that the inlet of the hollow drill rod cannot be blocked.
Drawings
FIG. 1 is a cross-sectional view of a dual layer dust extraction drill according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a double layer dust extraction drill bit according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a planetary gear train of a double-layer dust-collecting drill according to an embodiment of the present invention;
in FIGS. 1-3 above, 1-inner bit; 2-an outer drill bit; 201-a first upper annular flange; 202-a first lower annular flange; 3-a hollow drill rod; 301-a second upper annular flange; 302-a second lower annular flange; 4-a sleeve; 5-front drill rod; 501-cross bar; 6-planet wheel; 601-an axle; 7-sealing ring sheet.
The specific implementation mode is as follows:
the invention is further described below with reference to the accompanying drawings.
Examples
As shown in figure 1, the double-layer dust-absorbing drill bit is of an axisymmetric structure and comprises an inner drill bit 1, an outer drill bit 2, a hollow drill rod 3, a sleeve 4, a front drill rod 5 and a planet wheel 6, wherein the sleeve 4 is sleeved outside the hollow drill rod 3, and the front end of the hollow drill rod 3 extends out of the sleeve 4. The inner drill bit 1 is conical, and spiral blades are distributed on the conical surface of the inner drill bit 1. The outer drill bit 2 is circular and provided with sawtooth-shaped blades at the front end. The inner drill bit 1 is positioned in the outer drill bit 2, and the front end of the inner drill bit 1 does not exceed the front end of the outer drill bit 2. The inner drill bit 1 is fixed at the front end of the front drill rod 5, the tail end of the front drill rod 5 is provided with two groups of parallel cross bars 501, and the cross bars 501 are fixed on the inner wall of the front end of the hollow drill rod 3. An inner gear ring is arranged on the inner wall of the tail end of the outer drill bit 2, and an outer gear ring is arranged on the outer wall of the front end of the hollow drill rod 3. Fig. 2 is a cross-sectional view of a-a in fig. 1, in which 4 planetary gears 6 are equidistantly distributed between an inner gear ring and an outer gear ring, and the inner gear ring, the planetary gears 6 and the outer gear ring form a planetary gear train.
As shown in fig. 3, the inner wall of the outer drill bit 2 is provided with a first upper annular flange 201 and a first lower annular flange 202, the first upper annular flange 201 is positioned above the inner gear ring, the first lower annular flange 202 is positioned below the inner gear ring, the outer wall of the front end of the hollow drill rod 3 is provided with a second upper annular flange 301 and a second lower annular flange 302, the second upper annular flange 301 is positioned above the outer gear ring, the second lower annular flange 302 is positioned below the outer gear ring, the first upper annular flange 201 is opposite to the second upper annular flange 301, the first lower annular flange 202 is opposite to the second lower annular flange 302, the planet wheel 6 is clamped on the first upper annular flange 201 and the first lower annular flange 202, in the casing enclosed by the second upper annular flange 301 and the second lower annular flange 302, the front end of the axle 601 of the planetary gear 6 is clamped between the first upper annular flange 201 and the second upper annular flange 301, and the lower end of the axle 601 of the planetary gear is clamped between the first lower annular flange 202 and the second lower annular flange 302. The ends of the axles 601 of the planet wheels extend beyond the lower surfaces of the first and second lower annular flanges 202, 302 and are fixed to the front end of the sleeve 4. The inner edge of the sealing ring sheet 7 is attached to the outer wall of the hollow drill rod 3, the outer edge of the sealing ring sheet 7 is attached to the inner wall of the outer drill bit 2, the lower surface of the sealing ring sheet 7 is attached to the upper surfaces of the first upper annular flange 201 and the second upper annular flange 301, and the upper end of the wheel shaft 601 extends out of the upper surfaces of the first upper annular flange 201 and the second upper annular flange 301 and is clamped on the sealing ring sheet 7.
During drilling, the hollow drill rod 3 and the sleeve 4 are synchronously pushed, the hollow drill rod 3 rotates in the sleeve 4, the inner drill bit 1 and the hollow drill rod 3 coaxially rotate, and the planet wheel 6 is driven to rotate through the outer gear ring. The planet wheel 6 only rotates because the wheel shaft 601 is fixed on the sleeve 4, so that the outer drill bit 2 can be driven to rotate around the inner drill bit 1, and the rotation direction of the outer drill bit 2 is opposite to that of the inner drill bit 1. The sawtooth-shaped blades of the outer drill bit 2 firstly contact the rock mass, a round weak surface is cut on the rock mass, and then the inner drill bit 1 contacts the weak surface to further break the rock mass. The broken fragments are pressed into the hollow drill rod 3 by the spiral blades on the inner drill bit 1 and are sucked out by the negative pressure in the hollow drill rod 3. Since the gap between the inner drill bit 1 and the outer drill bit 2 becomes gradually narrower from front to back, the fragments with larger volume are left between the inner drill bit 1 and the outer drill bit 2 and are cut and crushed again by the spiral blades of the inner drill bit 1 until the fragments are crushed into the fragments which can pass through the narrowest part between the inner drill bit 1 and the outer drill bit 2.
Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention and it is intended to cover in the claims the invention as defined in the appended claims.
Claims (4)
1. A double-layer dust-absorbing drill bit is characterized by comprising an inner drill bit, an outer drill bit, a front drill rod, a sleeve, a hollow drill rod and a planet wheel, wherein the sleeve is sleeved outside the hollow drill rod, and the front end of the hollow drill rod extends out of the sleeve;
the inner drill bit is conical, and spiral blades are distributed on the conical surface of the inner drill bit;
the outer drill bit is circular, and the front end of the outer drill bit is provided with a sawtooth-shaped blade;
the inner drill bit is positioned in the middle of the outer drill bit, and the front end of the inner drill bit does not exceed the front end of the outer drill bit;
the inner drill bit is fixed at the front end of the front drill rod, the tail end of the front drill rod is provided with a cross rod, and the cross rod is fixed on the inner wall of the front end of the hollow drill rod;
an inner gear ring is arranged on the inner wall of the tail end of the outer drill bit, an outer gear ring is arranged on the outer wall of the front end of the hollow drill rod, more than 2 planet gears are positioned between the inner gear ring and the outer gear ring, and the inner gear ring, the planet gears and the outer gear ring form a planet gear train;
the inner wall of the outer drill bit is provided with a first upper annular flange and a first lower annular flange, the first upper annular flange is positioned above the inner gear ring, the first lower annular flange is positioned below the inner gear ring, the outer wall of the front end of the hollow drill rod is provided with a second upper annular flange and a second lower annular flange, the second upper annular flange is positioned above the outer gear ring, the second lower annular flange is positioned below the outer gear ring, the first upper annular flange is opposite to the second upper annular flange, the first lower annular flange is opposite to the second lower annular flange, the planet wheel is clamped in a shell formed by the first upper annular flange, the first lower annular flange, the second upper annular flange and the second lower annular flange, the upper end of a wheel shaft of the planet wheel is clamped between the first upper annular flange and the second upper annular flange, and the lower end of the wheel shaft of the planet wheel is clamped between the first lower annular flange and the second lower annular flange;
the tail end of the wheel shaft of the planet wheel extends out of the lower surfaces of the first lower annular flange and the second lower annular flange and is fixed on the front end of the sleeve.
2. The double-layer dust-collecting drill bit as claimed in claim 1, wherein the number of the planet wheels is 4, and the 4 planet wheels are distributed in a gap between the inner gear ring and the outer gear ring at equal intervals.
3. The double layer dust extraction drill bit of claim 1, wherein the cross bars are in two sets, and the two sets of cross bars are arranged in parallel.
4. The double-layer dust-collecting drill bit according to claim 1, further comprising a sealing ring piece, wherein the inner edge of the sealing ring piece abuts against the outer wall of the hollow drill rod, the outer edge of the sealing ring piece abuts against the inner wall of the outer drill bit, the lower surface of the sealing ring piece abuts against the upper surfaces of the first upper annular flange and the second upper annular flange, and the upper end of the axle extends out of the upper surfaces of the first upper annular flange and the second upper annular flange and is clamped on the sealing ring piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810757852.3A CN108915602B (en) | 2018-07-11 | 2018-07-11 | Double-layer dust-absorbing drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810757852.3A CN108915602B (en) | 2018-07-11 | 2018-07-11 | Double-layer dust-absorbing drill bit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108915602A CN108915602A (en) | 2018-11-30 |
| CN108915602B true CN108915602B (en) | 2020-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810757852.3A Active CN108915602B (en) | 2018-07-11 | 2018-07-11 | Double-layer dust-absorbing drill bit |
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| Country | Link |
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| CN (1) | CN108915602B (en) |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201679442U (en) * | 2010-03-29 | 2010-12-22 | 中国石油集团川庆钻探工程有限公司 | Planetary structure for balancing reaction torque of drilling equipment in well drilling |
| CN102409979B (en) * | 2011-09-22 | 2013-08-14 | 张永忠 | Stone-crushing drill bit |
| CN103046872B (en) * | 2013-01-21 | 2014-10-15 | 常州信息职业技术学院 | Combined multistage mud crushing drill |
| KR20140111817A (en) * | 2013-03-12 | 2014-09-22 | 신원특수건설(주) | Apparatus for ground boring |
| CN103352659B (en) * | 2013-07-29 | 2015-07-08 | 河南理工大学 | Backpitch shattering and dust collecting drill bit |
| CN103485715A (en) * | 2013-09-17 | 2014-01-01 | 西南石油大学 | Drilling tool capable of controlling reactive torque |
| CN205370449U (en) * | 2016-01-21 | 2016-07-06 | 盐城市中标工程装备制造有限公司 | Go into rock drill bit structure |
| CN206769819U (en) * | 2017-03-23 | 2017-12-19 | 安徽理工大学 | Broken screw thread deslagging bottom plate efficient drilling drill bit device in a kind of outer brill |
| CN207296875U (en) * | 2017-08-25 | 2018-05-01 | 苏州圣雷动力机械有限公司 | A kind of ground auger that there is balance to bore ground moment capacity |
| CN207309026U (en) * | 2017-08-27 | 2018-05-04 | 泰达长林管道科技（江西）股份有限公司 | A kind of new suction bits boring cutter |
| CN207568504U (en) * | 2017-11-10 | 2018-07-03 | 中石化石油工程技术服务有限公司 | Power drilling tool seal transmission shaft without untwisting angle |
| CN108678678B (en) * | 2018-06-06 | 2024-04-02 | 中国矿业大学 | Mining double-layer dry dust collection drill bit |
| CN109488210B (en) * | 2018-10-12 | 2021-02-05 | 徐州锋通信息科技有限公司 | Double-layer drill bit |
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2018
- 2018-07-11 CN CN201810757852.3A patent/CN108915602B/en active Active
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| CN108915602A (en) | 2018-11-30 |
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