CN108843245B - Expanding drill bit and pile foundation hole expanding method - Google Patents
Expanding drill bit and pile foundation hole expanding method Download PDFInfo
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- CN108843245B CN108843245B CN201810529317.2A CN201810529317A CN108843245B CN 108843245 B CN108843245 B CN 108843245B CN 201810529317 A CN201810529317 A CN 201810529317A CN 108843245 B CN108843245 B CN 108843245B
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- cutter
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- pile foundation
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000003247 decreasing effect Effects 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 26
- 238000009434 installation Methods 0.000 abstract description 3
- 238000002360 preparation method Methods 0.000 abstract description 3
- 238000005553 drilling Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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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
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
- E21B10/32—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
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- 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
-
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention belongs to the technical field of civil engineering construction equipment, and discloses an expanding drill bit which comprises a drill bit body and an expanding cutter, wherein one end of the drill bit body is provided with a working part, the expanding cutter comprises a fixing plate and a cutter, one end of the fixing plate is detachably connected with the drill bit body, the other end of the fixing plate is connected with the cutter, and the maximum distance between the cutter and the central axis of the drill bit body is greater than the distance between the outer wall of the drill bit body and the central axis of the. Through the arrangement of the expanding cutter detachably connected with the drill bit body, in the pile foundation hole construction process, the expanding of the pile foundation hole can be realized through the installation of the expanding cutter, the inconvenience caused by replacement of a drill bit with a large diameter in the construction process is avoided, the construction difficulty is reduced, and the construction efficiency is improved. And only a plurality of expanding cutters with different structural sizes need to be prepared, so that the preparation quantity of the drill bits is reduced, and the investment of early-stage cost can be reduced. The invention further provides a pile foundation hole expanding method, which can reduce the rotary digging difficulty of the pile foundation hole needing expanding and improve the rotary digging efficiency of the pile foundation hole.
Description
Technical Field
The invention relates to the technical field of civil engineering construction equipment, in particular to an expanding drill bit and a pile foundation hole expanding method.
Background
In pile foundation construction, a steel casing is often required to be arranged in the hole forming process of certain pile foundations, but the diameter of a common steel casing is larger than that of a pile hole, so that the diameter of a drill bit used for arranging the casing is also larger than that of the drill bit used for forming the hole of the pile foundations.
When the existing pile foundation is constructed, drill bits with different diameters are often required to be prepared, and the drill bits with corresponding diameters are used according to the diameters of the rotary-excavated pile foundation holes, so that the drill bits are frequently required to be replaced in the construction process, the construction time and the construction cost are increased, the labor intensity of field workers is increased, and the construction efficiency is reduced.
Disclosure of Invention
The invention aims to provide an expanding drill bit, which aims to solve the problems that in the prior art, the drill bit needs to be replaced frequently in the process of rotary drilling pile foundation holes with different diameters, so that the construction time and the construction cost are increased, and the construction difficulty is increased.
In order to achieve the purpose, the invention adopts the following technical scheme:
an expanded diameter drill bit comprising:
a drill body, one end of which is provided with a working part;
the diameter expanding cutter comprises a fixing plate and a cutter, wherein one end of the fixing plate is detachably connected with the drill bit body, the other end of the fixing plate is connected with the cutter, and the maximum distance between the cutter and the central axis of the drill bit body is greater than the distance between the outer wall of the drill bit body and the central axis of the drill bit body.
Preferably, the cutter comprises a first cutter and a second cutter which are connected, and the first cutter and the second cutter are both vertically connected to the fixing plate.
Preferably, one side of the two opposite sides of the end of the second cutter connected with the fixing plate is connected with the second cutter, and the other side of the second cutter is abutted against the outer wall of the drill body.
Preferably, the second cutter is obliquely arranged and is lower at the side abutting against the outer wall of the drill body.
Preferably, the second cutter is connected with the fixing plate to form an L-shaped structure.
Preferably, the fixing plate is provided with a first fixing hole, the drill body is provided with a second fixing hole at a position opposite to the first fixing hole, and the fixing plate is fixed on the drill body by a fastener through the first fixing hole and the second fixing hole.
Preferably, the drill bit further comprises a fixing piece, the fixing piece comprises a horizontal portion and a vertical portion connected with the horizontal portion, a third fixing hole is formed in the horizontal portion, the fixing piece fixes the fixing plate on the drill bit body through the third fixing hole, the first fixing hole and the second fixing hole, and one end, which is not connected with the horizontal portion, of the vertical portion is pressed against the fixing plate.
In order to achieve the purpose, the invention further provides a pile foundation hole expanding method, the expanding drill bit is adopted, and the maximum distance between the cutter and the central axis of the drill bit body is increased or reduced according to the diameter of a pile foundation hole needing rotary drilling.
The invention has the beneficial effects that:
according to the expanding drill bit provided by the invention, the expanding cutter detachably connected with the drill bit body is arranged, so that the expanding of a pile foundation hole can be realized by installing the expanding cutter in the pile foundation hole construction process, the drill bits with different diameters are prevented from being replaced in the construction process, the expanding cutter is convenient to install and disassemble, the manufacturing cost is low, the construction difficulty is reduced, the construction time is shortened, and the construction efficiency is improved. And before the construction of the pile foundation hole, only a plurality of expanding cutters with different structural sizes are needed to be prepared, so that the preparation quantity of the drill bits is reduced, and the investment of early-stage cost is reduced. In addition, the diameter-expanding cutter is arranged at one end of the drill bit body far away from the working part, so that when the pile foundation hole is rotationally dug, the diameter-expanding cutter only needs to rotationally dig a part of geological stratum outside the radius of the drill bit body, the workload of the diameter-expanding cutter is reduced, and the service life of the diameter-expanding cutter is prolonged.
The pile foundation hole expanding method provided by the invention can reduce the rotary digging difficulty of the pile foundation hole needing expanding and improve the rotary digging efficiency of the pile foundation hole.
Drawings
FIG. 1 is a schematic view of the construction of an expanded diameter drill bit according to the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
fig. 3 is a schematic structural view of the expanding cutter according to the present invention.
In the figure:
1. a drill bit body; 11. a working part;
2. expanding the diameter and cutting the tool; 21. a fixing plate; 211. a first fixing hole; 22. a first cutter; 23. a second cutter;
3. a fixing member; 31. a horizontal portion; 32. a vertical portion;
4. a fastener.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
As shown in fig. 1 to 3, the present embodiment provides an expanding drill, which includes a drill body 1 and an expanding cutter 2, wherein a working portion 11 is provided at one end of the drill body 1, and in the present embodiment, the drill body 1 has a cylindrical structure. The expanding cutter 2 comprises a fixing plate 21 and a cutter, one end of the fixing plate 21 is detachably connected with one end, far away from the working part 11, of the drill body 1, the other end of the fixing plate is connected with the cutter, the maximum distance between the cutter and the central axis of the drill body 1 is larger than the radius of the drill body 1, and as long as the distance between the cutter and the central axis of the drill body 1 is larger than the radius of the drill body 1, the pile foundation hole which is rotatably drilled by the drill body 1 can be expanded through the expanding cutter 2.
Through setting up the hole enlargement cutter 2 of being connected with drill bit body 1 is dismantled for in pile foundation hole work progress, can realize the hole enlargement of pile foundation hole through installation hole enlargement cutter 2, avoided the inconvenience that the drill bit of changing great diameter brought when the construction, hole enlargement cutter 2 installs and dismantles conveniently moreover, and the cost is low, has reduced the construction degree of difficulty, has shortened the engineering time, has improved the efficiency of construction. And before the construction of the pile foundation hole, only a plurality of expanding cutters 2 with different structural sizes need to be prepared, so that the preparation quantity of the drill bits is reduced, and the investment of early-stage cost is reduced. In addition, the diameter-expanding cutter 2 is arranged at one end of the drill bit body 1 far away from the working part 11, so that when the pile foundation hole is dug, the diameter-expanding cutter 2 only needs to dig a part of geological stratum outside the radius of the drill bit body 1, the workload of the diameter-expanding cutter 2 is reduced, and the service life of the diameter-expanding cutter 2 is prolonged.
As shown in fig. 1 and 3, the expanding cutter 2 includes a fixing plate 21 and a cutter, a first fixing hole 211 is formed in one end of the fixing plate 21, which is not connected to the cutter, the first fixing hole 211 is a threaded hole, a second fixing hole is formed in the drill body 1 at a position opposite to the first fixing hole 211, the second fixing hole is a threaded hole, a fastening member 4 fixes the fixing plate 21 to the drill body 1 through the first fixing hole 211 and the second fixing hole, and the fastening member 4 is a bolt. When the pile foundation hole needs to be expanded, the expanding cutters 2 with different structural sizes are installed according to the diameter of the pile foundation hole which needs to be dug, specifically, the fixing plates 21 with different lengths are installed, that is, the fixing plates 21 of the expanding cutters 2 with different lengths are different.
Through setting up first fixed orifices 211, second fixed orifices into the screw hole, and fix fixed plate 21 on drill bit body 1 through the bolt, can realize being connected with dismantling of drill bit body 1 fixed plate 21, the installation and the dismantlement of the fixed plate 21 of being convenient for.
The cutter comprises a first cutter 22 and a second cutter 23 which are connected, the first cutter 22 is arranged in the vertical direction and is perpendicular to the fixing plate 21, the second cutter 23 is also perpendicular to the fixing plate 21, the second cutter 23 and the fixing plate 21 are in an L-shaped structure, one side edge of two opposite side edges of one end, connected with the fixing plate 21, of the second cutter 23 is connected with the first cutter 22, and the other side edge of the second cutter is abutted to the outer wall of the drill bit body 1. In addition, the second cutter 23 is obliquely arranged, wherein the side connected with the first cutter 22 is higher, and the side abutted with the outer wall of the drill bit body 1 is lower.
By abutting one side edge of the second cutter 23 with the outer wall of the drill bit body 1, the stability of the expanding cutter 2 can be improved in the process of rotary digging a pile foundation hole, and the expanding cutter 2 is prevented from being deformed or damaged due to large shaking in the working process. Through setting up second cutter 23 slope, and it is lower with one side of drill bit body 1 outer wall looks butt, make at the in-process of digging a foundation hole soon, the part that second cutter 23 is close to drill bit body 1 outer wall contacts with the geological layer earlier, second cutter 23 keeps away from behind the one end of drill bit body 1 and contacts with the geological layer, realize that second cutter 23 is dug the geological layer soon in the layering on drill bit body 1's radial direction, receive great effort and lead to second cutter 23 to produce and warp or damage when avoiding second cutter 23 and geological layer to contact.
As shown in fig. 1 and 2, the expanding drill further includes a fixing member 3, the fixing member 3 includes a horizontal portion 31 and a vertical portion 32 connected to the horizontal portion 31, a third fixing hole is formed in the horizontal portion 31, the third fixing hole is a threaded hole, a fastening member 4 fixes the fixing plate 21 to the drill body 1 through the third fixing hole, the first fixing hole 211 and the second fixing hole, and one end of the vertical portion 32, which is not connected to the horizontal portion 31, is pressed against the fixing plate 21.
By providing the fixing member 3, when the fixing plate 21 is fixed to the drill body 1 by the fastening member 4 through the third fixing hole, the first fixing hole 211 and the second fixing hole, the vertical portion 32 exerts a certain acting force on the fixing plate 21, so that the stability of the expanding cutter 2 is increased, and the expanding cutter 2 is prevented from being deformed or damaged due to large shaking in the working process.
The embodiment also provides a pile foundation hole expanding method, wherein the maximum distance between the cutter and the central axis of the drill bit body 1 is increased or reduced according to the diameter of the pile foundation hole needing rotary drilling.
In the construction process of the pile foundation hole, when a pile foundation hole with a larger diameter than that of the drill bit body 1 needs to be dug, the maximum distance between the cutter and the central axis of the drill bit body 1 can be changed according to the difference between the radius of the pile foundation hole which needs to be dug and the radius of the drill bit body 1, namely, the difference between the radius of the pile foundation hole which needs to be dug and the radius of the drill bit body 1 is equal to the maximum distance between the cutter and the central axis of the drill bit body 1 minus the radius of the drill bit body 1, namely, the linear distance between one side of the first cutter 22, which is far away from the drill bit body 1, and the length of the second cutter 23 in the radial direction of the drill bit body 1 is correspondingly increased, so that the side, which is not connected with the first cutter 22, of the second cutter 23. The linear distance between the first cutter 22 and the outer wall of the drill body 1 is adjusted by changing the length of the fixing plate 21.
The pile foundation hole expanding method can reduce the rotary digging difficulty of the pile foundation hole needing expanding and improve the rotary digging efficiency of the pile foundation hole.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (5)
1. An expanded diameter drill bit, comprising:
a drill body (1) having a working portion (11) provided at one end thereof;
the expanding cutter (2) comprises a fixing plate (21) and a cutter, one end of the fixing plate (21) is detachably connected with the drill bit body (1), the other end of the fixing plate is connected with the cutter, and the maximum distance between the cutter and the central axis of the drill bit body (1) is greater than the distance between the outer wall of the drill bit body (1) and the central axis of the drill bit body (1);
the cutter comprises a first cutter (22) and a second cutter (23) which are connected, and the first cutter (22) and the second cutter (23) are both vertically connected to the fixing plate (21);
one side edge of two opposite side edges at one end, connected with the fixed plate (21), of the second cutter (23) is connected with the first cutter (22), and the other side edge of the second cutter is abutted against the outer wall of the drill bit body (1);
the second cutter (23) is obliquely arranged and is lower than the side, abutted against the outer wall of the drill bit body (1).
2. The expanding drill bit according to claim 1, characterized in that the second tool (23) is connected to the fixing plate (21) in an "L" configuration.
3. The expanding drill bit according to claim 1, wherein the fixing plate (21) is provided with a first fixing hole (211), the drill bit body (1) is provided with a second fixing hole at a position opposite to the first fixing hole (211), and a fastener (4) fixes the fixing plate (21) to the drill bit body (1) through the first fixing hole (211) and the second fixing hole.
4. The expanding drill bit according to claim 3, further comprising a fixing member (3), wherein the fixing member (3) comprises a horizontal portion (31) and a vertical portion (32) connected to the horizontal portion (31), a third fixing hole is formed in the horizontal portion (31), the fixing plate (21) is fixed to the drill bit body (1) by the fastening member (4) through the third fixing hole, the first fixing hole (211) and the second fixing hole, and one end of the vertical portion (32) not connected to the horizontal portion (31) is pressed against the fixing plate (21).
5. A pile foundation hole expanding method is characterized in that the expanding drill bit according to any one of claims 1 to 4 is adopted, and the maximum distance between a cutter and the central axis of a drill bit body is increased or decreased according to the diameter of a pile foundation hole needing rotary excavating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810529317.2A CN108843245B (en) | 2018-05-29 | 2018-05-29 | Expanding drill bit and pile foundation hole expanding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810529317.2A CN108843245B (en) | 2018-05-29 | 2018-05-29 | Expanding drill bit and pile foundation hole expanding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108843245A CN108843245A (en) | 2018-11-20 |
| CN108843245B true CN108843245B (en) | 2020-03-13 |
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| CN201810529317.2A Active CN108843245B (en) | 2018-05-29 | 2018-05-29 | Expanding drill bit and pile foundation hole expanding method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20140062591A (en) * | 2012-11-13 | 2014-05-26 | (주)삼일이엔씨 | Drill bit for underground excavation and slime discharging method using that |
| JP2014177793A (en) * | 2013-03-14 | 2014-09-25 | Toda Constr Co Ltd | Step processing device for drilling hole |
| JP2017066807A (en) * | 2015-10-01 | 2017-04-06 | Ｊｆｅスチール株式会社 | Hydraulic cylinder type expansion head |
| JP2018009391A (en) * | 2016-07-14 | 2018-01-18 | 住鉱資源開発株式会社 | Drilling system and drilling method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202451059U (en) * | 2011-12-29 | 2012-09-26 | 山河智能装备股份有限公司 | Hole dilating drill bit |
| CN204436263U (en) * | 2015-01-29 | 2015-07-01 | 徐威 | The double-deck diameter-enlarging drill bit of a kind of civil engineering pile foundation construction |
| CN205154031U (en) * | 2015-11-06 | 2016-04-13 | 宁波易通建设有限公司 | A drill bit for constructing concrete drilling bored concrete pile |
| CN106194034A (en) * | 2016-08-31 | 2016-12-07 | 中冶天工集团有限公司 | A kind of hydraulically adjustable drill bit device for the expanding pore-forming of pile foundation and construction method thereof |
| CN206329279U (en) * | 2016-12-29 | 2017-07-14 | 罗秀松 | Civil engineering pile foundation construction bilayer diameter-enlarging drill bit |
-
2018
- 2018-05-29 CN CN201810529317.2A patent/CN108843245B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20140062591A (en) * | 2012-11-13 | 2014-05-26 | (주)삼일이엔씨 | Drill bit for underground excavation and slime discharging method using that |
| JP2014177793A (en) * | 2013-03-14 | 2014-09-25 | Toda Constr Co Ltd | Step processing device for drilling hole |
| JP2017066807A (en) * | 2015-10-01 | 2017-04-06 | Ｊｆｅスチール株式会社 | Hydraulic cylinder type expansion head |
| JP2018009391A (en) * | 2016-07-14 | 2018-01-18 | 住鉱資源開発株式会社 | Drilling system and drilling method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108843245A (en) | 2018-11-20 |
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