CN106894765B - Hole expanding drilling tool - Google Patents
Hole expanding drilling tool Download PDFInfo
- Publication number
- CN106894765B CN106894765B CN201710136565.6A CN201710136565A CN106894765B CN 106894765 B CN106894765 B CN 106894765B CN 201710136565 A CN201710136565 A CN 201710136565A CN 106894765 B CN106894765 B CN 106894765B
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- cutting
- expanding
- hollow pipe
- pipe body
- wing
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- 238000005553 drilling Methods 0.000 title abstract description 40
- 238000005520 cutting process Methods 0.000 claims abstract description 79
- 238000003756 stirring Methods 0.000 claims abstract description 33
- 238000000034 method Methods 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 239000011800 void material Substances 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 13
- 239000000956 alloy Substances 0.000 abstract description 3
- 229910045601 alloy Inorganic materials 0.000 abstract description 3
- 238000005299 abrasion Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 241000219122 Cucurbita Species 0.000 description 1
- 235000009852 Cucurbita pepo Nutrition 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000126 substance Substances 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
- E21B10/26—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
- E21B10/327—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 the cutter being pivoted about a longitudinal axis
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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 hole expanding drilling tool comprises a hollow pipe body, expanding cutting wings, second cutting wings, a plurality of groups of stirring blades and wear-resisting plates; the stirring blades are arranged on the outer wall of the hollow pipe body at intervals up and down, and form an included angle of 90 degrees in the radial direction relative to the two groups; the second cutting wings are in a double-head form, are arranged on the outer wall of the hollow pipe body in a mode of radially surrounding the hollow pipe body, and form an included angle with a certain angle in the radial direction of the second cutting wings; the wear-resisting plates are fixedly arranged on the stirring blade, the enlarged cutting wing and the free end arc surface of the second cutting wing which is coaxial with the hollow pipe body; the second wing panel forms an included angle with a certain angle in the radial direction of the drilling tool pipe body; the enlarged cutter body and the second cutting cutter body are made of hard alloy blocks. The invention has the characteristics of simple and convenient hole expansion, high strength of the cutting cutter body, high wear resistance of the spiral blade, high drilling capability, full stirring and the like, and effectively improves the drilling efficiency and the construction quality.
Description
Technical Field
The invention relates to a drilling tool, in particular to a reaming drilling tool for foundation construction.
Background
Along with the development needs of high-rise buildings, large bridges and urban subway foundation construction projects, as the construction of the mixing piles has the advantages of simple equipment, no vibration, no noise, no lateral extrusion to surrounding soil bodies, short construction period, low construction cost and the like, long spiral equal-diameter pile drilling machines are widely applied, and besides the limitation on the equal-diameter piles due to poor bearing capacity, novel bearing piles such as various bottom expanding piles and gourd piles are also adopted in the foundation construction. The reaming mode of the reamer generally comprises two modes of mechanical reaming and hydraulic reaming, wherein the mechanical reaming is opened by virtue of self gravity when a reaming wing drills down along a drilling rod, and is automatically closed by virtue of a lever principle when the reaming wing is lifted, and the problem that the reaming size cannot be ensured exists in the reamer; the hydraulic expanding drill utilizes a hydraulic expanding oil cylinder to expand and furl, the adopted expanding oil cylinder is generally arranged on the outer wall of a drill rod or in the inner cavity of the drill rod, the expanding oil cylinder is in the erosion of substances such as compressed air, slurry and the like during expanding, the requirements on the machining precision and the sealing property of the expanding oil cylinder are high, the manufacturing and assembling difficulty is high, hydraulic system faults are easily caused due to failure of a sealing element during the using process, and the hydraulic expanding drill cannot be operated according to requirements when the key that the expanding arm needs to be opened in time to perform expanding operation during the drilling process of a drilling tool is needed.
In the construction of high-rise buildings, large bridges and urban subway infrastructure projects, the conditions of uneven hardness of strata, sand and gravel inclusion and the like are frequently encountered, and when a hole expanding drilling machine is used for drilling, digging, lifting up and down and repeatedly stirring, the hole expanding drilling tool at the lowest end bears larger drilling and stirring resistance, so that the quality problems of serious abrasion of the cutting edge of the cutting tool bit of the drilling tool, serious blade abrasion, uneven stirring and the like are caused, the operation efficiency is greatly reduced, and the overall strength of an improved reinforcing body is seriously influenced. Therefore, a hole expanding drilling tool used for a hole drilling and hole expanding reamer which is suitable for the construction method is needed, the hole expanding drilling tool can not only complete the operation of expanding the section of the pile end and the pile body, but also has the characteristics of simple hole expanding, high strength of a cutting cutter body, high wear resistance of a spiral blade and high drilling capacity, the wear condition of blades and cutter heads is effectively reduced, the service life of equipment is greatly prolonged, the construction efficiency is improved, and the use and maintenance cost is greatly reduced.
Disclosure of Invention
The invention aims to provide a reaming drilling tool which is simple and convenient to ream, high in cutting cutter body strength, high in spiral piece wear resistance, high in drilling capability, sufficient in stirring, capable of ensuring that the construction efficiency is improved and the use and maintenance cost is greatly reduced according to the defects in the prior art.
The invention is realized by the following technical scheme:
a reamer tool comprising:
the hollow pipe body comprises a grouting pipe arranged in the inner cavity of the hollow pipe body, a grouting valve positioned at the lower end of the hollow pipe body and an outer joint, and the outer wall of the hollow pipe body is provided with a supporting groove;
the expanding cutting wing comprises an expanding arm, a plurality of expanding cutter bodies arranged on the expanding arm, a frame seat welded on the outer wall of the hollow pipe body, a pin shaft and a buffer stop block, and the components are defined as one group of the expanding cutting wing;
a second cutting wing comprising a second cutting blade body and a second airfoil;
a plurality of groups of stirring blades and wear-resisting plates;
the method is characterized in that:
the stirring blades are arranged on the outer wall of the hollow pipe body above the enlarged cutting wings at intervals up and down, and 90-degree included angles are formed in the radial direction of the hollow pipe body in a cross mode relative to the two groups of stirring blades;
the two groups of the expanding cutting wings are positioned below the plurality of groups of stirring blades and are arranged in a geometric symmetry or equal-angle interval mode along the radial direction of the hollow pipe body; each expanding arm of each group of expanding cutting wings is arranged on a pin seat of each frame seat through a pin shaft pivot, a plurality of reaming cutter bodies are respectively arranged on the lower edge of each expanding arm, and the position of the reaming cutter body on the lower edge of one expanding arm and the position of the reaming cutter body on the lower edge of the other expanding arm are arranged in a cross mode at intervals on a rotating track except the reaming cutter body on the free end of each expanding arm; the buffer stop block is fixedly arranged on the outer wall of the hollow pipe body, and the outer end of the reaming cutter body of each enlarging arm just reaches the inner side of the buffer stop block when the reaming cutter body rotates around the pin shaft and retracts into each frame seat while the hollow pipe body rotates forwards;
the second cutting wings are in a double-head form, are positioned on the hollow pipe body below the expanding wings at different intervals from front to back, and the upper wings of the second cutting wings are arranged on the outer peripheral surface of the hollow pipe body in a manner of radially surrounding the hollow pipe body; in addition, a row of second cutting cutter bodies are respectively arranged on the second lower edge of each second wing piece in the double heads of the second cutting wing, and except the cutting cutter body of each second wing piece on the free end of the second lower edge, the position of the second cutting cutter body on the second lower edge of one second wing piece and the position of the second cutting cutter body on the second lower edge of the other second wing piece are arranged in a spaced and crossed mode on a rotating track;
the wear-resisting plates are fixedly arranged on the stirring blade, the enlarged cutting wing and the free end arc surface of the hollow pipe body, wherein the second cutting wing and the free end arc surface are coaxial.
The invention can be that each expanding arm of the expanding cutting wing retracts into the gap of each frame seat when the hollow pipe body rotates forwards, and the rotating diameter of the outermost end of the expanding arm and the frame seat is less than or equal to the rotating diameter of the free end of the stirring blade.
The blade surfaces of the multiple groups of stirring blades can incline towards the same direction, and the included angle alpha between the blade surfaces and the axial center line of the hollow tube is = 8-38 degrees.
The second airfoil surface of each second airfoil of the second cutting wing inclines towards the same direction, and the included angle beta 2= 25-55 degrees between the second airfoil surface and the axial center line of the hollow pipe body.
The reaming cutter body on the enlarging cutting wing and the second cutting cutter body of the second cutting wing are both made of hard alloy blocks.
Drawings
FIG. 1 is a schematic view of the construction of the reamer tool of the invention;
FIG. 2 is a left side view of FIG. 1;
FIG. 3 is a bottom view of FIG. 2;
FIG. 4 is an enlarged view of portion A of FIG. 1;
fig. 5 is a schematic view of the enlarged cutting wings of the reamer tool of the invention retracted into the housing.
Detailed Description
As shown in fig. 1-5, a reamer tool comprising: the hollow pipe body 1 comprises a grouting pipe 11 arranged in the inner cavity of the hollow pipe body, a grouting valve 13 positioned at the lower end of the hollow pipe body and an outer joint 14, wherein a supporting groove 12 is arranged on the outer wall of the hollow pipe body; an expansion cutting wing 3 including an expansion arm 31, a plurality of reamer bodies 32 mounted on the expansion arm, a holder 33 welded to an outer wall of the hollow tube body 1, a pin 34, and a buffer stopper 35, which are defined as a set of expansion cutting wings; a second cutting wing 5 including a second cutting blade body 51 and a second fin; a plurality of groups of stirring blades 2 and wear-resisting plates 6; the plurality of groups of stirring blades 2 are arranged on the outer wall of the hollow pipe body 1 above the enlarged cutting wing 3 at intervals up and down, and form an included angle of 90 degrees in the radial direction of the hollow pipe body 1 in a crossed manner relative to the two groups of stirring blades; the blade surfaces 21 of the multiple groups of stirring blades 2 are inclined towards the same direction, and the included angle alpha between the blade surfaces and the axial center line of the hollow tube body 1 is = 8-38 degrees;
the two groups of the expanding cutting wings 3 are positioned below the plurality of groups of the stirring blades 2 and are arranged in a geometric symmetry or equal-angle interval mode along the radial direction of the hollow pipe body 1; the expanding arms 31, 31 'of each of the two groups of the expanding cutting wings 3 are pivotally mounted on the pin bosses of each of the holders 33, 33' by means of the pin shafts 34, the lower sides 311, 311 'of each of the expanding arms 31, 31' of each of the holders 33,33 'are respectively provided with a plurality of reamer bodies 32, and the position of the reamer body 32 on the lower side 311 of one expanding arm 31 and the position of the reamer body 32 on the lower side 311' of the other expanding arm 31 'are alternately arranged in a cross manner on the rotation locus except the reamer body 32 on the free end of each of the expanding arms 31, 31'; the buffer stop block 35 is fixedly arranged on the outer wall of the hollow pipe body 1, and ensures that the reaming cutter body 32 of each enlarging arm 31, 31 'rotates around the pin shaft 34 and retracts into each frame seat 33, 33' when the hollow pipe body 1 rotates in the positive direction, and the outermost end of the reaming cutter body just reaches the inner side of the buffer stop block 35; when the hollow pipe body 1 rotates forwards, each expanding arm 31, 31 'of the expanding cutting wing 3 retracts into the gap of each frame seat 33, 33', and at the moment, the rotation diameter of the outermost ends of the expanding arms and the frame seats is smaller than or equal to the rotation diameter of the free end of the stirring blade 2; the second cutting wings 5 are double-headed and are disposed on the hollow tube body below the enlarged cutting wings 3 at different intervals in the front and rear directions, and their second wings are disposed on the outer circumferential surface thereof in such a manner as to radially surround the hollow tube body 1, respectively; in addition, a row of the second cutting cutter bodies 51 is mounted on the second lower edges 521, 521 'of the second blades 52, 52' of each of the double-ended second blades of the second cutting blade 5, and the positions of the second cutting cutter bodies 51 on the second lower edges 521 'of the first blades 52 and 52' are alternately arranged with the positions of the second cutting cutter bodies 51 on the second lower edges 521 'of the second blades 52' of the other second blades 52 'on the rotation locus except that the cutting cutter bodies 51 on the second lower free ends of the second blades 52, 52' of each of the double-ended second blades are equidistantly arranged; the second wing surface 522 of each second wing piece 52, 52' of each second cutting wing 5 is inclined towards the same direction, and the included angle β 2= 25-55 ° between the second wing surface 522 and the axial center line of the hollow tube 1; the reaming cutter body 32 on the enlarged cutting wing 3 and the second cutting cutter body 51 of the second cutting wing 5 are both made of hard alloy blocks; the wear-resisting plates 6 are respectively and fixedly arranged on the free end arc surfaces of the stirring blades 2, the enlarged cutting wings 3, the second cutting wings 5 and the hollow pipe body 1 which are coaxial.
When the hole expanding drilling tool is used, the drill rods of the hole expanding drilling machine are connected, the hole expanding drilling tool is connected finally, the outer joint at the upper end of the hole expanding drilling tool is sleeved in the inner joint of the drill rods, and the hole expanding drilling tool is locked by the pin shaft. Starting a stirring drilling machine to rotate a drill rod, enabling a hole expanding drilling tool to rotate in the forward direction (the expanding arms 31 and 31 'retract and are positioned in gaps of the frame seats 33 and 33') while drilling and stirring, cutting off the power supply of the drilling machine to stop drilling when the required drilling depth is reached, then switching the rotation direction of the drill rod to rotate in the reverse direction, at the moment, opening and expanding each expanding arm of the expanding cutting wings of the hole expanding drilling tool respectively, namely, the expanding arms 31 and 31 'extend out of the frame seats from the gaps of the frame seats 33 and 33', reaming and drilling by using a reaming cutter body on the lower side of each expanding arm, switching the drill rod to rotate in the reverse direction after the reaming diameter required by design is reached, respectively retracting each expanding arm of the expanding cutting wings to the gaps of the frame seats, and lifting up the drill rod to finish the reaming operation.
Besides meeting the reaming requirement, the reaming drilling tool of the invention also arranges a plurality of groups of stirring blades which are crossed in the radial direction to form an included angle of 90 degrees and are spaced up and down on the outer wall of the hollow tube body 1, thereby effectively improving the stirring uniformity of the drilling tool; and the second cutting wings arranged at the lower part of the hollow pipe body have the characteristics of high strength of the cutting cutter body, high abrasion resistance of the spiral blade, simple and convenient hole expansion, high drilling capability, full stirring and the like, and effectively improve the drilling efficiency and the construction quality.
Various changes and modifications may be made without departing from the spirit of the invention, and the scope of the invention is to be determined by the appended claims.
Claims (5)
1. A reamer tool comprising:
the hollow pipe body (1) comprises a grouting pipe (11) arranged in the inner cavity of the hollow pipe body, a grouting valve (13) positioned at the lower end of the hollow pipe body and an outer joint (14), and the outer wall of the hollow pipe body is provided with a supporting groove (12);
the expanding cutting wing (3) comprises an expanding arm (31), a plurality of expanding cutter bodies (32) arranged on the expanding arm, a frame seat (33) welded on the outer wall of the hollow pipe body (1), a pin shaft (34) and a buffer stop block (35), and the components are defined as one group of the expanding cutting wing;
a second cutting wing (5) comprising a second cutting blade body (51) and a second vane;
a plurality of groups of stirring blades (2) and wear-resisting plates (6);
the method is characterized in that:
the multiple groups of stirring blades (2) are arranged on the outer wall of the hollow pipe body (1) above the enlarged cutting wings (3) at intervals up and down, and form an included angle of 90 degrees in the radial direction of the hollow pipe body (1) in a cross mode relative to the two groups of stirring blades;
the two groups of the expanding cutting wings (3) are positioned below the plurality of groups of stirring blades (2) and are arranged in a geometric symmetry or equal-angle interval mode along the radial direction of the hollow pipe body (1); each of the expanding arms (31, 31 ') of each of the expanding cutting wings (3) is pivotally mounted to a pin boss of each of the holder seats (33, 33 ') by a pin shaft (34), each of the expanding arms (31, 31 ') of the expanding cutting wings (3) is retracted into a space of each of the holder seats (33, 33 ') when the hollow tubular body (1) is rotated in the forward direction, a plurality of reamer bodies (32) are respectively mounted on a lower edge (311, 311 ') of each of the expanding arms (31, 31 '), and a position of the reamer body (32) on the lower edge (311) of one of the expanding arms (31) and a position of the reamer body (32) on the lower edge (311 ') of the other expanding arm (31 ') are alternately arranged in a crossing manner on a rotational locus except for the reamer body (32) on a free end of each of the expanding arms (31, 31 '); the buffer stop block (35) is fixedly arranged on the outer wall of the hollow pipe body (1), and the outer end of the reaming cutter body (32) of each expanding arm (31, 31 ') just reaches the inner side of the buffer stop block (35) when the reaming cutter body rotates around the pin shaft (34) and retracts into each frame seat (33, 33') while the hollow pipe body (1) rotates forwards;
the second cutting wings (5) are in a double-head form, are positioned on the hollow pipe body (1) below the expanding cutting wings (3) at different intervals from front to back, and second wings of the second cutting wings are respectively arranged on the outer peripheral surface of the hollow pipe body (1) in a manner of radially surrounding the hollow pipe body; in addition, in the double heads of the second cutting wings (5), a row of second cutting cutter bodies (51) is respectively arranged on the second lower edges (521, 521 ') of the second wing pieces (52, 52') of each head, and except that the cutting cutter bodies (51) of the second wing pieces (52, 52 ') of each head on the free ends of the second lower edges are arranged at equal intervals, the positions of the second cutting cutter bodies (51) on the second lower edges (521') of the second wing pieces (52) of one head and the positions of the second cutting cutter bodies (51) on the second lower edges (521 ') of the second wing pieces (52') of the other head are arranged in a spaced and crossed mode on a rotating track;
the wear-resisting plates (6) are fixedly arranged on the free end arc surfaces of the stirring blades (2), the expanding cutting wings (3), the second cutting wings (5) and the hollow pipe body (1) which are coaxial.
2. The reamer tool according to claim 1, wherein the outermost end of the enlarged arms and the shelf when each of the enlarged arms (31, 31 ') is retracted into the void of each shelf (33, 33') has a diameter of revolution which is less than or equal to the diameter of revolution of the free end of the mixing blade (2).
3. The reaming drill according to claim 1, characterized in that the blade surfaces (21) of the plurality of sets of stirring blades (2) are inclined in the same direction, and the included angle α between the blade surfaces and the axial center line of the hollow pipe body (1) is 8-38 °.
4. The reamer tool as claimed in claim 1, wherein the second wing surface (522) of each second wing (52, 52') of the second cutting wing (5) is inclined in the same direction, and the included angle β 2 between the second wing surface (522) and the axial center line of the hollow tubular body (1) is 25-55 °.
5. The reamer tool according to claim 1, wherein the reamer body (32) of the reamer wings (3) and the second cutter body (51) of the second cutter wing (5) are made of cemented carbide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710136565.6A CN106894765B (en) | 2017-03-09 | 2017-03-09 | Hole expanding drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710136565.6A CN106894765B (en) | 2017-03-09 | 2017-03-09 | Hole expanding drilling tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106894765A CN106894765A (en) | 2017-06-27 |
| CN106894765B true CN106894765B (en) | 2020-01-24 |
Family
ID=59185353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710136565.6A Active CN106894765B (en) | 2017-03-09 | 2017-03-09 | Hole expanding drilling tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106894765B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108396738B (en) * | 2018-05-07 | 2023-09-19 | 上海工程机械厂有限公司 | Stirring drill rod with built-in core pipe |
| WO2022112989A1 (en) * | 2020-11-25 | 2022-06-02 | Build King (Zens) Engineering Limited | Column formation tools |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202125249U (en) * | 2011-06-24 | 2012-01-25 | 中煤科工集团西安研究院 | Casting plug-in type diamond compact anchor rod bit and connecting sleeve thereof |
| CN202531027U (en) * | 2011-10-15 | 2012-11-14 | 上海金泰工程机械有限公司 | Multi-blade cutting hydraulic hole enlarger |
| CN102505919A (en) * | 2011-12-29 | 2012-06-20 | 山河智能装备股份有限公司 | Bearizing drilling bit |
| CN104110218A (en) * | 2014-07-30 | 2014-10-22 | 淮南市利升工贸有限责任公司 | Three wing drill bit |
| CN105909174B (en) * | 2016-06-28 | 2018-08-03 | 上海工程机械厂有限公司 | A kind of stirring drill tool |
| CN206707633U (en) * | 2017-03-09 | 2017-12-05 | 上海广大基础工程有限公司 | A kind of borehole-enlarging drilling tool |
-
2017
- 2017-03-09 CN CN201710136565.6A patent/CN106894765B/en active Active
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| CN106894765A (en) | 2017-06-27 |
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