CN104265179A - Drill bit of variable-curvature screw pile driver - Google Patents
Drill bit of variable-curvature screw pile driver Download PDFInfo
- Publication number
- CN104265179A CN104265179A CN201410477060.2A CN201410477060A CN104265179A CN 104265179 A CN104265179 A CN 104265179A CN 201410477060 A CN201410477060 A CN 201410477060A CN 104265179 A CN104265179 A CN 104265179A
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- Prior art keywords
- drill bit
- screw blade
- curved surface
- pile driver
- drill
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- 238000005553 drilling Methods 0.000 claims description 40
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 11
- 239000011159 matrix material Substances 0.000 claims description 9
- 238000005520 cutting process Methods 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims description 4
- 239000002689 soil Substances 0.000 abstract description 39
- 210000003371 toe Anatomy 0.000 abstract description 7
- 238000009412 basement excavation Methods 0.000 abstract description 3
- 238000003795 desorption Methods 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 abstract description 2
- 239000011664 nicotinic acid Substances 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 230000003592 biomimetic effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000004927 clay Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000003556 assay Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000010429 evolutionary process Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 210000002683 foot Anatomy 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000004088 simulation 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
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 provides a drill bit of a variable-curvature screw pile driver. The drill bit comprises a drill stem, a drill point, a screw blade and a drill pick; the curved surfaces of the two sides of the drill pick are an inner soil contacting curved surface and an outer soil contacting curved surface, respectively; the profile curve of the inner soil contacting curved surface of the longitudinal section of the drill pick and the profile curve of the outer soil contacting curved surface of the same conform to different equations, respectively; the drill point is composed of three drill point base bodies which are symmetrical to each other about the center of circle of an end face, going into soil, of the drill stem. The drill bit of the variable-curvature screw pile driver has the advantages that the equation curves adopted by the drill bit are optimized based on tests, the bionic curves applied to the inner and outer soil contacting curved surfaces are derived from cock toe soil contacting curved surfaces, the inner and outer soil contacting profile curves of the cock toes have excellent soil resistance reduction and desorption capability, and once the structures are applied to the drill pick part of the drill bit of the pile driver, the pile driver is enabled to have excellent soil excavation capability, and meanwhile, the soil resistance to the drill bit is also reduced, and therefore, the service life of the drill bit can be prolonged and the working efficiency of the drill bit can be improved.
Description
Technical field
The present invention relates to drilling equipment rock crushing tool field, specifically a kind of variable curvature screw pile driver drill bit.
Background technology
Screw pile driver, as a kind of common engineering machinery, has important application in the engineerings such as bridge, roadbed and tunnel.At present, drill bit conventional in engineering construction is made up of drilling rod, apex point, brill pick and spiral guide sheet etc., and screw blade is fixed on drilling rod, and apex point and brill pick are welded on boring bar head, and become inseparable one with drilling rod, drilling rod is hollow-core construction.There is following problem in the piling drill bit of this kind of structure: 1, apex point and brill pick serious wear in the process of piling; 2, in the process of piling, screw blade Clay Problem is serious; 3, apex point force structure is unreasonable, and in the piling process of reality, above problem can have a strong impact on piling efficiency, extends the engineering time, meanwhile, reduces the life-span of drilling bit of pile engine.
Summary of the invention
Because drilling bit of pile engine Problems existing in piling process is not only relevant with drill bit material and structure, also and relevant with the bit face geometry of soil sliding-contact, the object of the invention is to solve the problem that existing drill bit structure is unreasonable, clay is serious and the life-span is short, redesign the shape of drill bit, provide a kind of variable curvature screw pile driver drill bit.
The technical scheme that the present invention is adopted for achieving the above object is: a kind of variable curvature screw pile driver drill bit, comprise cylindrical drilling rod, be located at drilling rod bury end apex point, along drilling rod outer peripheral face helical disk row screw blade and be fixed on screw blade and bury two of end and bore pick, two N-Side surfs boring pick are respectively interior tactile native curved surface and inwardly touch the bending outer tactile native curved surface of native curved surface, and the contour curve boring the interior tactile native curved surface in the rip cutting section of pick meets equation respectively
with
, the span of t is 5 ~ 12; The outer contour curve touching native curved surface meets equation respectively
with
, the span of t is 5 ~ 12;
Described apex point is made up of centrosymmetric three the apex point matrixes in the center of circle of the end face that buries around drilling rod, apex point matrix from apex point top center to apex point bottom outline curve meet equation:
,
, t span is 5 ~ 145.
In the present invention, bore in pick side in crossing and touch in the rip cutting section of native curved surface and outer tactile native curved surface, the contour curve end of interior tactile native curved surface connects with the contour curve end circular arc of outer tactile native curved surface, and this arc radius is 30cm.
The side of each apex point matrix reverses 40 ° all clockwise or counterclockwise.
Screw blade of the present invention is formed by circular sliding slopes by the secondary screw blade of single line and multi-thread principal screw blade, and the screw diameter of secondary screw blade and principal screw blade is 60cm, principal screw blade is identical with the structure of secondary screw blade, screw blade is gerotor type, and the outline curvilinear equation of screw blade is
with
, t span is 3 ~ 147, and screw blade is by this curvilinear equation under certain screw diameter and helical pitch, and the outer peripheral face helical disk row around drilling rod form.Wherein, the pitch of principal screw blade is 30cm, and the helical pitch of secondary screw blade is 5cm, two bore pick with drilling rod axis for axis of symmetry, be located at the end of burying of secondary screw blade respectively.
Drilling bit of pile engine of the present invention comprises the brill pick of biomimetic type, the screw blade of gerotor type, the apex point of the asymptotic line style of meander configuration and columniform drilling rod four part, the working diameter of drilling bit of pile engine is 60cm, the diameter of drilling rod cross section transverse is 25cm, the setting that the active length of drill bit can be carried out as required, changes relevant parameter simultaneously and mates.Above equation curve is primitive curve, and can need to carry out convergent-divergent according to actual condition in the production and processing of reality, the intrinsic geometry form of curve does not change.
The present invention is based on bionical and method that is analytic geometry, reach and increase the service life, the object of enhancing productivity.Be applied to the gerotor type curve of screw blade, screw blade shows as mild concaveconvex structure, the stress field of this special construction shows as continuous print fluctuating nature, the continued jitters of stress field cause soil adhesion cutterhead probability greatly reduce, this kind of structure shows excellent reducing adhesion performance in soil box experiment.
Beneficial effect:
(1), in the present invention, drill bit equation curve used is based on assay optimization, has special geometry soil function.Wherein, the bionical curve being applied to the inside and outside tactile native curved surface of brill pick comes from cock toes and touches native curved surface, cock is looked for food in process daily, toe has very strong soil mining ability, and in long evolutionary process, its toe inside and outside contour touches native curve and has good soil drag reduction desorption ability, this structure is applied in the brill pick position of drilling bit of pile engine, not only make pile driver have and well excavate soil capacity, reduce the soil resistance suffered by drill bit simultaneously, improve application life and the operating efficiency of drill bit;
(2), the curvilinear equation of apex point matrix is asymptotic line style curve, excellent de-soil nature energy is shown in Soil simulation test, asymptotic line style geometry monomer can produce guiding effect to the soil of motion and produce rolling effect to soil particle simultaneously, this reduces the sticking probability on soil and apex point surface, simultaneously, the side of each apex point matrix reverses 40 ° all clockwise or counterclockwise, apex point operationally, the soil excavated can send screw blade to easily, and then raising excavation speed, reduce the possibility that rig adheres to, compared with prior art, show excellent desorption drag-reduction effect,
(3), drilling bit of pile engine redesigns by the present invention, asymptotic for one line style curve is applied to apex point design, a kind of biomimetic type curve is applied to and bores pick design, apex point and the curve bored corresponding to pick have special soil geometrical performance respectively, the motion state that soil is in contact with it surface can be changed, level and smooth cutting effect is produced to the soil of motion, thus reduces the working resistance of pile driver; This kind of structure can also make the stress field of soil show as continuous print fluctuating nature, the continued jitters of stress field can cause soil adhesion drill bit probability greatly reduce, drill bit is made to have stronger ability of burying and take off native effect preferably, simultaneously, when operation, can ground pressure be disperseed, reduce to touch native area, thus minimizing soil adhesion, reduce soil resistance; The present invention not only makes pile driver have good soil mining ability, reduces the excavating resistance of soil simultaneously, improves application life and the operating efficiency of drill bit.
Accompanying drawing explanation
Fig. 1 is the overall structure figure of drill bit;
Fig. 2 is the top view of Fig. 1;
Fig. 3 is the apex point elevation of asymptotic line style after distortion;
Fig. 4 is the contour curve figure boring pick rip cutting section;
Fig. 5 is the stereogram boring pick;
Fig. 6 is the partial schematic diagram of screw blade.
Reference numeral: 1, drilling rod, 2, apex point, 201, apex point matrix, 3, bore pick, 301, interior tactile native curved surface, 302, outer tactile native curved surface, 4, principal screw blade, 5, secondary screw blade.
Detailed description of the invention
A kind of variable curvature screw pile driver drill bit, as shown in Figure 1, comprise cylindrical drilling rod 1, be located at drilling rod 1 bury end apex point 2, along drilling rod 1 outer peripheral face helical disk row screw blade and be fixed on bury two of end of screw blade and bore pick 3.
Wherein, two are bored the axis that pick 3 is symmetrical in drilling rod 1 and are symmetrical arranged, and two brill pick 3 all bend to the direction, axis of drilling rod 1, wherein two opposite flanks of boring pick 3 are bending curve, are respectively interior tactile native curved surface 301 and inwardly touch the bending outer tactile native curved surface 302 of native curved surface 301; Another two opposite flanks of boring pick 3 are perpendicular.Contour curve along the interior tactile native curved surface in the section boring pick 3 perpendicular meets equation respectively
with
, t span is 5 ~ 12; The outer contour curve touching native curved surface meets equation respectively
with
, t span is 5 ~ 12; Bore in the rip cutting section of pick 3 side, the contour curve end of interior tactile native curved surface connects with the contour curve end circular arc of outer tactile native curved surface, and this arc radius is 30cm.
Apex point 2 is made up of centrosymmetric three the apex point matrixes 201 in the center of circle of the end face that buries around drilling rod, apex point matrix 201 from apex point 2 top center to apex point 2 bottom outline curve meet equation:
with
, t span is 5 ~ 145; The side of each apex point matrix 201 reverses 40 ° all clockwise or counterclockwise.
Wherein, as shown in Figure 1, screw blade is formed by circular sliding slopes by the secondary screw blade 5 of single line and multi-thread principal screw blade 4, secondary screw blade 5 is identical with the screw diameter of principal screw blade 4, two described brill pick 3 for axis of symmetry, are located at the end of burying of secondary screw blade 5 with drilling rod 1 axis respectively.
Further, the outline curvilinear equation of screw blade is
with
, t span is 3 ~ 147, and screw blade is by this curvilinear equation under certain screw diameter and helical pitch, and the outer peripheral face helical disk row around drilling rod 1 form.
As shown in Figure 1, drill bit comprises biomimetic type and bores pick 3, gerotor type screw blade, meander configuration asymptote apex point 2 and columniform drilling rod 1 four part, the clockwise distortion 40 ° of apex point curve novelty on asymptotic basis, the soil that apex point operationally excavates can send screw blade to easily, and then raising excavation speed, reduce the possibility that rig adheres to.The working diameter of drill tip is 60cm, and namely the screw diameter of secondary screw blade 5 and principal screw blade 4 is 60cm, and the diameter of the cross section transverse of drilling rod 1 is 25cm, and the pitch of principal screw blade 4 is 30cm, and the helical pitch of secondary screw blade 5 is 5cm.Apex point 2 and drilling rod 1 are seamless welding, and screw blade and drilling rod 1 are seamless welding, and the anglec of rotation is 180 degree, and each blade is all through fillet process.Bore pick 3 and be welded on the end of burying of secondary screw blade 5, two to bore pick 3 be symmetrical structure, the setting that the active length of drill bit can be carried out as required, and change relevant parameter mates simultaneously.
Due to the material that biology carries out through long-term and nature, energy and information exchange, create the system adapting to ecological environment, many scientific and technical difficult problems have obtained at living nature and have satisfactorily resolved, in the present invention, the bionical curve being applied to the inside and outside tactile native curved surface of brill pick comes from cock toes and touches native curved surface, in the Initial adaption process of cock toes and soil, the maximum feature formed excavates foot prosperity, this structure is applied in the brill pick position of drilling bit of pile engine, not only make pile driver have and well excavate soil capacity, reduce the soil resistance suffered by drill bit simultaneously, improve application life and the operating efficiency of drill bit.
Above equation curve is primitive curve, and can need to carry out convergent-divergent according to overall size in the production and processing of reality, the intrinsic geometry form of curve does not change.The concrete size of above-mentioned geometry entity and distribute spacing also should be determined according to concrete working environment and soil property; Meanwhile, should be taken into account the quality of processing technology and the height of use cost.Machining process route should according to material behavior, and existing processing method is specifically formulated.
Claims (7)
1. a variable curvature screw pile driver drill bit, comprise cylindrical drilling rod (1), be located at drilling rod (1) bury end apex point (2), along drilling rod (1) outer peripheral face helical disk row screw blade and be fixed on screw blade and bury two of end and bore pick (3), it is characterized in that: two N-Side surfs boring pick (3) are respectively interior tactile native curved surface (301) and inwardly touch the bending outer tactile native curved surface (302) of native curved surface (301), and the contour curve boring the interior tactile native curved surface in the rip cutting section of pick (3) meets equation respectively
with
, the span of t is 5 ~ 12; The outer contour curve touching native curved surface meets equation respectively
with
, the span of t is 5 ~ 12;
Described apex point (2) is made up of centrosymmetric three the apex point matrixes (201) in the center of circle of the end face that buries around drilling rod (1), and the outline curve of apex point matrix (201) bottom from apex point (2) top center to apex point (2) meets equation:
with
, t span is 5 ~ 145.
2. a kind of variable curvature screw pile driver drill bit according to claim 1, it is characterized in that: bore in the rip cutting section of pick (3) side, the interior contour curve end touching native curved surface connects with the contour curve end circular arc of outer tactile native curved surface, and this arc radius is 30cm.
3. a kind of variable curvature screw pile driver drill bit according to claim 1, is characterized in that: the side of each apex point matrix (201) reverses 40 ° all clockwise or counterclockwise.
4. a kind of variable curvature screw pile driver drill bit according to claim 1, it is characterized in that: described screw blade is formed by circular sliding slopes by the secondary screw blade (5) of single line and multi-thread principal screw blade (4), principal screw blade (4) is identical with the screw diameter of secondary screw blade (5), two described brills pick (3) for axis of symmetry, are located at the end of burying of secondary screw blade (5) with drilling rod (1) axis respectively.
5. a kind of variable curvature screw pile driver drill bit according to claim 1 or 4, is characterized in that: the outline curvilinear equation of described screw blade is
with
, t span is 3 ~ 147, and screw blade is by this curvilinear equation under certain screw diameter and helical pitch, and the outer peripheral face helical disk row around drilling rod (1) form.
6. a kind of variable curvature screw pile driver drill bit according to claim 4, it is characterized in that: the pitch of described principal screw blade (4) is 30cm, the helical pitch of secondary screw blade (5) is 5cm, and the screw diameter of secondary screw blade (5) and principal screw blade (4) is 60cm.
7. a kind of variable curvature screw pile driver drill bit according to claim 1, is characterized in that: the diameter of the cross section transverse of described drilling rod (1) is 25cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410477060.2A CN104265179B (en) | 2014-09-18 | 2014-09-18 | A kind of variable curvature screw pile driver drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410477060.2A CN104265179B (en) | 2014-09-18 | 2014-09-18 | A kind of variable curvature screw pile driver drill bit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104265179A true CN104265179A (en) | 2015-01-07 |
| CN104265179B CN104265179B (en) | 2016-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410477060.2A Expired - Fee Related CN104265179B (en) | 2014-09-18 | 2014-09-18 | A kind of variable curvature screw pile driver drill bit |
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| Country | Link |
|---|---|
| CN (1) | CN104265179B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105464589A (en) * | 2016-01-11 | 2016-04-06 | 河南理工大学 | Bionic drilling method and drill rod for resistance reduction and heat dissipation of soft coal petrography |
| CN114875910A (en) * | 2022-06-13 | 2022-08-09 | 中冶建工集团有限公司 | Pile hole processing device of pile foundation based on foundation processing and using method |
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|---|---|---|---|---|
| US6033152A (en) * | 1997-04-11 | 2000-03-07 | Berkel & Company Contractors, Inc. | Pile forming apparatus |
| CN2806740Y (en) * | 2005-03-18 | 2006-08-16 | 吴敦水 | Drilling bit of pile engine for building construction |
| CN201635661U (en) * | 2010-04-01 | 2010-11-17 | 宁波麦克潘特电动工具有限公司 | Three-blade drill |
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-
2014
- 2014-09-18 CN CN201410477060.2A patent/CN104265179B/en not_active Expired - Fee Related
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105464589A (en) * | 2016-01-11 | 2016-04-06 | 河南理工大学 | Bionic drilling method and drill rod for resistance reduction and heat dissipation of soft coal petrography |
| CN114875910A (en) * | 2022-06-13 | 2022-08-09 | 中冶建工集团有限公司 | Pile hole processing device of pile foundation based on foundation processing and using method |
| CN114875910B (en) * | 2022-06-13 | 2024-02-20 | 中冶建工集团有限公司 | Pile hole treatment device of pile foundation based on foundation treatment and use method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104265179B (en) | 2016-07-13 |
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