CN110242217A - A kind of earth-boring bits - Google Patents
A kind of earth-boring bits Download PDFInfo
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- CN110242217A CN110242217A CN201910497880.0A CN201910497880A CN110242217A CN 110242217 A CN110242217 A CN 110242217A CN 201910497880 A CN201910497880 A CN 201910497880A CN 110242217 A CN110242217 A CN 110242217A
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- brill
- female
- bores
- mother
- bore
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- 241001074085 Scophthalmus aquosus Species 0.000 claims abstract description 89
- 230000005484 gravity Effects 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 238000004080 punching Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 4
- 239000002689 soil Substances 0.000 description 9
- 230000013011 mating Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000009333 weeding Methods 0.000 description 2
- 241000422846 Sequoiadendron giganteum Species 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000004720 fertilization Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C5/00—Making or covering furrows or holes for sowing, planting or manuring
- A01C5/04—Machines for making or covering holes for sowing or planting
-
- 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
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (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 belongs to bit technique field, specifically a kind of earth-boring bits；It is bored including mother and son bores；Annular groove is offered in female brill, one end of sub- brill is welded with sliding block, and one end that sub- brill is welded with sliding block is protruded into from the end that mother bores, and sliding block is put into annular groove, and frictional force bores the gravity being subject to greater than son between sliding block and annular groove；The sub- brill and female brill cooperate the service precision for improving drill bit；The configuration of the present invention is simple is used in conjunction with each other with what son bored by female bore, the precision cut the earth and burrowed can be improved.
Description
Technical field
The invention belongs to bit technique field, specifically a kind of earth-boring bits.
Background technique
In order to transplant trees in gardens or establish timber guardrail etc., needing to cut the earth on the ground burrows, and people generally make
It the tools such as shovels with spade the operations such as to be dug a hole, planted trees, and in order to improve working efficiency, reduce labor intensity, people research and develop in succession
It is some for carrying out the power-driven tools of gardens operation, substantially increase the mechanization degree of gardens operation, such as ground auger, ground auger
The nursery stock landscape engineering plantation for being widely used in hillside fields, sand ground, hard soil is digged pit, and the periphery of the big tree of digging is unearthed；It encloses
Cave is dug in column pile anchoring；Fruit tree, forest fertilization dig cave, intertillage, weeding of landscape engineering etc., diameter of digging pit: 200-600mm, ground
Boring operation, not less than 80 holes by calculating in darg 8 hours can dig 640 holes per hour, be artificial more than 30 times, in
It ploughs, breadth of weeding is operated at 50 centimetres or more per hour not less than 800 square metres, really realize full automatic working process,
Ground auger allows people to free from heavy manual labor, and powerful is strong, good appearance, and operation is comfortable, and labor intensity is low,
It is suitble to various landform, high-efficient, easy to carry and field field operation.
The working efficiency of ground auger removes except the size of its power, additionally depends on the quality of drill bit, existing ground auger
Drill bit, usually based on list brill, and the diameter of digging pit of ground auger is 200-600mm, and the efficiency for only leaning on single brill shoveling to burrow is too low,
And the diameter of drill bit is excessive, is unfavorable for controlling the precision digged pit, it is therefore desirable to solve.
Summary of the invention
In order to make up for the deficiencies of the prior art, use single brill operating efficiency low and precision to solve ground auger in the prior art
The problem of difference, the invention proposes a kind of earth-boring bits.
The technical solution adopted by the present invention to solve the technical problems is: a kind of earth-boring bits of the present invention, including
Mother bores and son bores；Annular groove is offered in female brill, one end of sub- brill is welded with sliding block, and sub- brill is welded with one end of sliding block
It is protruded into from the end that mother bores, and sliding block is put into annular groove, frictional force is greater than what son brill was subject between sliding block and annular groove
Gravity；The sub- brill and female brill cooperate the service precision for improving drill bit；The drill bit is placed on ground auger in use, in ground auger
Output device drive it is female bore rotation, rotation is bored by annular groove and sliding block mating band mover while mother bores rotation, in this way
At work, brill first and ground face contact, it is big to the pressure on ground because the diameter of son brill is bored less than female, so sub- driller
As when drill bit can be improved cut the earth the efficiency that burrows, while providing positioning for female brill, improve the precision cut the earth and burrowed, and female brill is in work
When making, on the basis of the shoveling of sub- brill burrows range, the range that drill bit shoveling burrows can be improved, improve effective work of drill bit
Area, and female bore works under the premise of sub- brill has cut the earth and burrowed, and can also save the electric power of a part of ground auger, be equivalent to saving
Resource.
Preferably, cavity is offered at the top of the annular groove, the width of cavity is greater than the width of annular groove；It is described
Son, which is bored, to be connected between cavity by spring, and sub- brill starts to move into cavity in contact ground rear slider；Son is bored to be beaten in shoveling
When hole, with the increase of tunnelling footage, the pressure that sub- brill is given on ground is bigger, and at this moment the sliding block in son brill can be to shifting at cavity
Dynamic, after sliding block is moved fully in cavity, i.e., sliding block is detached from from annular groove, and at this moment son, which bores, to turn again as mother bores
It is dynamic, on the one hand, and a part of electric power of ground auger can be saved；On the other hand, facilitate female work boring investment shoveling and burrowing, and son
It bores and is no longer rotated after mother's brill is devoted oneself to work, the amount for entering soil in annular groove can also be reduced, facilitate the clear of drill bit later period
Reason.
Preferably, the top of the cavity is symmetrically connected with magnetic patch on the basis of spring, and magnetic patch will be for that will enter in cavity
Son bore absorption；Group drills into cavity, and the magnetic patch just adhered to by cavity top adsorbs, and can prevent drill bit from burrowing in shoveling
Afterwards, when stretching out out of hole that accomplish fluently, sub- brill pops under the action of spring restoring force, causes to hurt to the user of ground auger
Evil.
Preferably, female bore is made of female bore of No.1 mother brill and No. two, and No.1 mother bores close No. two female one end bored and opens
Equipped with rectangular channel, No. two female bore offer identical rectangular channel, rectangular channel and square with No.1 mother brill close to one end that No.1 mother bores
It is connected between shape slot by I-shaped connector, I-shaped connector and rectangular channel are rotatablely connected；The No.1 mother bores close to two
Number female one end bored offers semicircle shape pit, and No. two female to bore upper one end corresponding with semicircle shape pit to be connected with semicircle shape convex
It rises, semicircle shape protrusion and semicircle shape pit cooperate the impact force for improving drill bit；Mother bores at work, because female bore by No.1
Mother bores and No. two mothers bore composition, and No.1 mother bores and offers semicircle shape pit, and semicircle shape protrusion is connected on No. two female brills, female
Rotation is bored to cut the earth when burrowing, because in semicircle shape pit dislocation movement can occur for semicircle shape protrusion the reason of by geostatic pressure,
Simultaneously as I-shaped connector connection No.1 mother bores and No. two female the reason of boring, No. two female bore can move up and down, produce to ground
Raw certain impact force, the efficiency to burrow the so that drill bit that can further improve drill bit is cut the earth.
Preferably, the semicircle shape protrusion is made of rubber material, and semicircle shape protrusion is hollow structure, semicircle shape protrusion
It is equipped with air inlet；It is equipped with air flue in described No. two female brills, one end of air flue is connected to semicircle shape protrusion, and the other end is connected to No. two
Mother bores one end far from semicircle shape protrusion；For semicircle shape protrusion when semicircle shape pit misplaces mobile, semicircle shape projections compress makes half
Portion gas in round shape protrusion is excluded by air flue from No. two female bottoms bored, can be when No. two female drillers make by its two sides
Part soil is blown off, to further increase the efficiency that drill bit shoveling burrows.
It preferably, include one layer of cushion in the rectangular channel, cushion is for reducing I-shaped connector and rectangle
Frictional force between slot；Cushion can reduce by No. two female brills when moving up and down, and I-shaped connector is to No.1 mother brill and two
Number female impact force bored, to improve the service life of drill bit.
Beneficial effects of the present invention are as follows:
1. a kind of earth-boring bits of the present invention, structure is simple, is used in conjunction with each other, can be mentioned with what son bored by female bore
The precision that height shoveling burrows, and female brill is at work, on the basis of the shoveling of sub- brill burrows range, drill bit shoveling can be improved and beat
The range in hole improves effective work area of drill bit, and female bore works under the premise of sub- brill has cut the earth and burrowed, and can also save
The electric power of a part of ground auger, is equivalent to and has saved resource.
2. a kind of earth-boring bits of the present invention, structure novel are bored by the way that mother's brill is divided into No.1 mother brill and No. two mothers,
And by setting semicircle shape pit and semicircle shape protrusion, mother bores rotation and cuts the earth when burrowing, because the reason of by geostatic pressure, half
Round shape protrusion can occur dislocation in semicircle shape pit and move, simultaneously as I-shaped connector connection No.1 mother bores and No. two female brills
The reason of, No. two female bore can move up and down, and certain impact force be generated to ground, so that the drill bit that can further improve drill bit is dug
The efficiency that soil burrows.
Detailed description of the invention
The present invention will be further explained below with reference to the attached drawings.
Fig. 1 is main view of the invention；
Fig. 2 is the structural schematic diagrams that No.1 mother bores in the present invention and No. two mothers bore；
Fig. 3 is the partial enlarged view in Fig. 2 at A；
In figure: mother bores 1, No.1 mother and bores 11, No. two female brills 12, rectangular channel 13, I-shaped connector 14, semicircle shape pit
15, semicircle shape protrusion 16, sub- brill 2, annular groove 3, sliding block 31, cavity 32, spring 33, magnetic patch 34, air inlet 4, air flue 41, slow
Rush pad 5.
Specific embodiment
In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, tie below
Specific embodiment is closed, the present invention is further explained.
As shown in Figure 1 to Figure 3, a kind of earth-boring bits of the present invention, including female brill 1 and son bore 2；In female brill 1
Annular groove 3 is offered, one end of sub- brill 2 is welded with sliding block 31, and one end that sub- brill 2 is welded with sliding block 31 bores 1 end from mother
It protrudes into, and sliding block 31 is put into annular groove 3, frictional force is greater than the gravity that son brill 2 is subject between sliding block 31 and annular groove 3；
The sub- brill 2 and female brill 1 cooperate the service precision for improving drill bit；The drill bit is placed on ground auger in use, in ground auger
Output device drives female 1 rotation of brill, and mother passes through annular groove 3 while boring 1 rotation and 31 mating band mover of sliding block bores 2 rotations,
So at work, son bores 2 and ground face contact first because the diameter that son bores 2 be less than it is female bore 1, it is big to the pressure on ground, so
The efficiency that drill bit shoveling burrows can be improved when son 2 work of brill, while providing positioning for female brill 1, improve the precision that shoveling burrows, and
Mother bores 1 at work, on the basis of the shoveling of sub- brill 2 burrows range, the range that drill bit shoveling burrows can be improved, improve drill bit
Effective work area, and it is female bore 1 and work under the premise of sub- brill 2 has cut the earth and burrowed, the electricity of a part of ground auger can also be saved
Power is equivalent to and has saved resource.
As a kind of specific embodiment of the invention, the top of the annular groove 3 offers cavity 32, cavity 32
Width is greater than the width of annular groove 3；It is connected between the sub- brill 2 and cavity 32 by spring 33, sub- brill 2 is after contacting ground
Sliding block 31 starts to move into cavity 32；Son bores 2 when shoveling burrows, and with the increase of tunnelling footage, sub- brill 2 is given on ground
Pressure is bigger, and at this moment to movement at cavity 32, after sliding block 31 is moved fully in cavity 32, i.e., son bores the meeting of sliding block 31 in 2
Sliding block 31 is detached from from annular groove 3, and at this moment son bores 2 and will not rotate again as mother bores 1, on the one hand, and ground auger can be saved
A part of electric power；On the other hand, female 1 investment of boring is facilitated to cut the earth the work to burrow, and son bore 2 mother bore 1 devote oneself to work after no longer
Rotation can also reduce the amount for entering soil in annular groove 3, facilitate the cleaning in drill bit later period.
As a kind of specific embodiment of the invention, the top of the cavity 32 is symmetrically connected on the basis of spring 33
Magnetic patch 34, son of the magnetic patch 34 for that will enter in cavity 32 bore 2 absorption；Group bores 2 and enters in cavity 32, just by 32 top of cavity
The magnetic patch 34 of attachment adsorbs, and can prevent drill bit after shoveling burrows, and when stretching out out of hole that accomplish fluently, sub- brill 2 is multiple in spring 33
It is popped under the action of the power of position, the user of ground auger is damaged.
As a kind of specific embodiment of the invention, female brill 1 is made of No.1 mother brill 11 and No. two female brills 12, and one
Number female to bore 11 and offer rectangular channel 13 close to No. two female 12 one end of boring, No. two female to bore 12 and opens up close to one end that No.1 mother bores 11
Have and bore 11 identical rectangular channels 13 with No.1 mother, is connected between rectangular channel 13 and rectangular channel 13 by I-shaped connector 14, work
Shaped connecting piece 14 and rectangular channel 13 are rotatablely connected；The No.1 mother bores 11 and offers semicircle shape close to one end of No. two female brills 12
Pit 15, No. two mothers bore one end corresponding with semicircle shape pit 15 on 12 and are connected with semicircle shape protrusion 16, semicircle shape protrusion 16
Cooperate the impact force for improving drill bit with semicircle shape pit 15；Mother bores 1 at work, because female bore 1 by No.1 mother 11 Hes of brill
No. two mothers bore 12 compositions, and No.1 mother bores and offers semicircle shape pit 15 on 11, are connected with semicircle shape protrusion on No. two female brills 12
16, mother bores 1 rotation and cuts the earth when burrowing, because semicircle shape protrusion 16 can be sent out in semicircle shape pit 15 the reason of by geostatic pressure
Raw dislocation movement, simultaneously as the connection No.1 mother of I-shaped connector 14 bores 11 and No. two female the reason of boring 12, No. two female brills 12
It can move up and down, certain impact force is generated to ground, the efficiency to burrow the so that drill bit that can further improve drill bit is cut the earth.
As a kind of specific embodiment of the invention, the semicircle shape protrusion 16 is made of rubber material, semicircle shape
Protrusion 16 is hollow structure, and semicircle shape protrusion 16 is equipped with air inlet 4；Described No. two female bore are equipped with air flue 41, air flue 41 in 12
One end and semicircle shape protrusion 16 be connected to, the other end is connected to No. two 12 one end far from semicircle shape protrusion 16 of female brill；Semicircle shape is convex
16 are played when semicircle shape pit 15 misplaces mobile, semicircle shape protrusion 16 is compressed, and the portion gas in semicircle shape protrusion 16 is passed through
Air flue 41 is excluded from the bottom of No. two female brills 12, can be blown off the part soil of its two sides in No. two female 12 work of brill, thus
Further increase the efficiency that drill bit shoveling burrows.
It include one layer of cushion 5, cushion 5 in the rectangular channel 13 as a kind of specific embodiment of the invention
For reducing the frictional force between I-shaped connector 14 and rectangular channel 13；Cushion 5 can reduce by No. two mothers and bore 12 upper and lower
When mobile, I-shaped connector 14 bores the impact force of 11 and No. two female brills 12 to No.1 mother, to improve the service life of drill bit.
Mother during fabrication, can be bored 1 point of two sections of manufacture to reserve rectangular channel 13 and cavity 32, reserve rectangular channel 13 by this drill bit
To place I-shaped connector 14, reserve cavity 32 to place spring 33 and magnetic patch 34, then will be divided to two sections of manufactures it is female bore 1 it
Between weld together.
The drill bit is placed on ground auger in use, the output device in ground auger drives female 1 rotation of brill, and mother bores the same of 1 rotation
When 2 rotations are bored by annular groove 3 and 31 mating band mover of sliding block, so at work, son bores 2 and ground face contact first, because
It is less than mother's brill 1 for the diameter of sub- brill 2, it is big to the pressure on ground, so son, which bores, can be improved the effect that drill bit shoveling burrows when 2 work
Rate, while boring 1 to be female and provide positioning, improves the precision cut the earth and burrowed, and it is female bore 1 at work, burrow range in the shoveling of sub- brill 2
On the basis of, the range that drill bit shoveling burrows can be improved, improve effective work area of drill bit, and female brill 1 has been dug in sub- brill 2
Soil works under the premise of burrowing, and can also save the electric power of a part of ground auger, be equivalent to and saved resource；Son bores 2 and beats in shoveling
When hole, with the increase of tunnelling footage, the pressure that sub- brill 2 is given on ground is bigger, and at this moment son bores the meeting of sliding block 31 in 2 to cavity 32
Place's movement, after sliding block 31 is moved fully in cavity 32, i.e., sliding block 31 is detached from from annular groove 3, and at this moment son brill 2 will not be again
As mother bores 1 rotation, on the one hand, and a part of electric power of ground auger can be saved；On the other hand, facilitate female 1 investment of brill to cut the earth to beat
The work in hole, and son bores 2 and no longer rotates after mother's brill 1 is devoted oneself to work, and can also reduce the amount for entering soil in annular groove 3,
Facilitate the cleaning in drill bit later period；Group bores 2 and enters in cavitys 32, is just adsorbed by the magnetic patch 34 adhered at the top of cavity 32, can be to prevent
Only drill bit is after shoveling burrows, and when stretching out out of hole that accomplish fluently, sub- brill 2 pops under the action of 33 reset force of spring, right
The user of ground auger damages；Mother's brill 1 at work, is made of because mother bores 1 No.1 mother brill 11 and No. two female brills 12, and one
Number female bore offers semicircle shape pit 15 on 11, No. two female bore are connected with semicircle shape protrusion 16 on 12, and mother, which bores 1 rotation and cuts the earth, to burrow
When, because in semicircle shape pit 15 dislocation movement can occur for semicircle shape protrusion 16, simultaneously as work the reason of by geostatic pressure
Shaped connecting piece 14 connects No.1 mother and bores 11 and No. two female the reason of boring 12, and No. two mothers bore 12 and can move up and down, generate to ground
Certain impact force, the efficiency to burrow the so that drill bit that can further improve drill bit is cut the earth；Cushion 5 can reduce by No. two female brills
12 when moving up and down, and I-shaped connector 14 bores the impact force of 11 and No. two female brills 12 to No.1 mother, to improve drill bit
Service life；Round shape protrusion 16 when semicircle shape pit 15 misplaces mobile, compress by semicircle shape protrusion 16, makes in semicircle shape protrusion 16
Portion gas excluded by air flue 41 from No. two female 12 bottoms of boring, can No. two it is female bore 12 work when by the part of its two sides
Soil is blown off, to further increase the efficiency that drill bit shoveling burrows.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, and the above embodiments and description only describe originals of the invention
Reason, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements
It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent circle
It is fixed.
Claims (6)
1. a kind of earth-boring bits, it is characterised in that: bore (1) including mother and son bores (2)；Female bore in (1) offers annular cunning
One end of slot (3), sub- brill (2) is welded with sliding block (31), and one end that sub- brill (2) is welded with sliding block (31) bores the end of (1) from mother
Protrude into, and sliding block (31) is put into annular groove (3), between sliding block (31) and annular groove (3) frictional force be greater than son brill (2) by
The gravity arrived；The sub- brill (2) and female bore (1) cooperate the service precision for improving drill bit.
2. a kind of earth-boring bits according to claim 1, it is characterised in that: offered at the top of the annular groove (3)
Cavity (32), the width of cavity (32) are greater than the width of annular groove (3)；Pass through bullet between the sub- brill (2) and cavity (32)
Spring (33) connection, sub- brill (2) start to move in cavity (32) in contact ground rear slider (31).
3. a kind of earth-boring bits according to claim 2, it is characterised in that: the top of the cavity (32) is with spring (33)
On the basis of be symmetrically connected with magnetic patch (34), magnetic patch (34) for will enter cavity (32) in son bore (2) absorption.
4. a kind of earth-boring bits according to claim 1, it is characterised in that: it is described it is female bore (1) by No.1 mother bore (11) and
No. two female bore (12) form, and No.1 mother bores (11) and offers rectangular channel (13) close to No. two female one end for boring (12), and No. two mothers bore
(12) it is offered close to one end that No.1 mother bores (11) and bores (11) identical rectangular channel (13), rectangular channel (13) and square with No.1 mother
It is connected between shape slot (13) by I-shaped connector (14), I-shaped connector (14) and rectangular channel (13) are rotatablely connected；Institute
It states No.1 mother and bores (11) and offered semicircle shape pit (15) close to No. two female one end for boring (12), No. two female to bore on (12) and semicircle
The corresponding one end of shape pit (15) is connected with semicircle shape protrusion (16), semicircle shape protrusion (16) and semicircle shape pit (15) cooperation
For improving the impact force of drill bit.
5. a kind of earth-boring bits according to claim 4, it is characterised in that: the semicircle shape raised (16) uses rubber material
Material is made, and semicircle shape protrusion (16) is hollow structure, and semicircle shape protrusion (16) is equipped with air inlet (4)；Described No. two female brills
(12) air flue (41) are equipped in, one end of air flue (41) is connected to semicircle shape raised (16), and the other end is connected to No. two mothers and bores (12)
One end far from semicircle shape raised (16).
6. a kind of earth-boring bits according to claim 4, it is characterised in that: include one layer slow in the rectangular channel (13)
Punching pad (5), cushion (5) are used to reduce the frictional force between I-shaped connector (14) and rectangular channel (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910497880.0A CN110242217B (en) | 2019-06-10 | 2019-06-10 | Earth drilling bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910497880.0A CN110242217B (en) | 2019-06-10 | 2019-06-10 | Earth drilling bit |
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| Publication Number | Publication Date |
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| CN110242217A true CN110242217A (en) | 2019-09-17 |
| CN110242217B CN110242217B (en) | 2020-12-11 |
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| CN201910497880.0A Active CN110242217B (en) | 2019-06-10 | 2019-06-10 | Earth drilling bit |
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| CN208057053U (en) * | 2018-04-03 | 2018-11-06 | 余跃泳 | A kind of geological reamer |
| CN208908559U (en) * | 2018-09-30 | 2019-05-31 | 中原工学院 | A kind of agricultural earth drill |
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2019
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030019667A1 (en) * | 2000-03-09 | 2003-01-30 | Wolfgang Peetz | Rock drill |
| CN101250983A (en) * | 2008-04-10 | 2008-08-27 | 中国京冶工程技术有限公司 | Single tube all-directional drilling injection slip-casting drilling bit capable of fluid-control starting and stopping auxiliary slip-casting hole |
| CN102086756A (en) * | 2011-03-15 | 2011-06-08 | 中国石油大学(北京) | Hole-dilating drill for pressure reduction and speed acceleration |
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| CN110242217B (en) | 2020-12-11 |
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