CN112814560A - Deformation drill bit - Google Patents
Deformation drill bit Download PDFInfo
- Publication number
- CN112814560A CN112814560A CN202011614957.7A CN202011614957A CN112814560A CN 112814560 A CN112814560 A CN 112814560A CN 202011614957 A CN202011614957 A CN 202011614957A CN 112814560 A CN112814560 A CN 112814560A
- Authority
- CN
- China
- Prior art keywords
- drill bit
- main
- circular hollow
- auxiliary
- hollow sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005553 drilling Methods 0.000 claims description 13
- 238000005422 blasting Methods 0.000 abstract description 13
- 238000000034 method Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 6
- 238000009412 basement excavation Methods 0.000 description 12
- 239000002360 explosive Substances 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 206010066054 Dysmorphism Diseases 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
Images
Classifications
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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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/001—Drilling a non circular hole
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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
- E21B10/42—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
-
- 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
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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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
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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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/002—Drilling with diversely driven shafts extending into the borehole
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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 discloses a deformation drill bit which comprises a main drill bit assembly, an auxiliary drill bit assembly and an auxiliary sleeve assembly, wherein the main drill bit assembly comprises a main drill rod and a main drill bit arranged at the front end of the main drill rod; the auxiliary sleeve assembly comprises a circular hollow sleeve, and the auxiliary drill bit assembly comprises an auxiliary drill bit; the circular hollow sleeve and the auxiliary drill bit are sequentially sleeved on the main drill rod, the circular hollow sleeve and the auxiliary drill bit do not rotate along with the main drill rod, the auxiliary drill bit is fixed at the front end of the circular hollow sleeve and located at the upper portion of the main drill bit, two sides of the auxiliary drill bit are provided with symmetrical blades with gradually-changed blade widths, the blades extend out of the auxiliary drill bit and the circular hollow sleeve, the narrow end of each blade is located at the front end of the circular hollow sleeve, and the wide end of each blade is located at the front end of the auxiliary drill bit. Compared with the prior art, the method can improve the hole-forming blasting effect of the tunnel and improve the phenomenon of overbreak and underexcavation.
Description
Technical Field
The invention relates to the technical field of tunnel blasting excavation, in particular to a deformation drill bit.
Background
The width of the country is very wide, and mountainous regions and heavy hills occupy about 75% of the territory area of China. When a road passes through a mountain area or a heavy hill, a tunnel is inevitably constructed to cross the mountain. The tunnel is not only a basic utilization form of an underground space, but also an important component of a traffic network such as a railway, a highway, an urban subway and the like. But various unfavorable conditions are easily produced in the excavation construction process of the current tunnel.
The existing drilling holes are all round by adopting a linear drill bit or a plum blossom drill bit; in order to facilitate charging powder and adapt to the hole type, the explosive cartridge is also made into a strip with a circular section. The explosive cartridge is detonated in the round hole, the energy of the explosive cartridge is uniformly diffused on the aspect of the cross section, the splitting probability in each direction is the same, and the periphery profile of the tunnel after blasting is uneven and smooth. The phenomenon of over-under excavation is easily caused by the peripheral displacement of the tunnel face in the excavation process. Overexcavation has a major detrimental effect on the stability of the surrounding rock, underexcavation will reduce the efficiency of construction work, both of which are uneconomical.
Disclosure of Invention
The invention aims to improve the hole-forming blasting effect of a tunnel and improve the phenomenon of overbreak and provides a deformation drill bit.
In order to achieve the purpose, the invention is implemented according to the following technical scheme:
a deformation drill bit comprises a main drill bit assembly, a secondary drill bit assembly and a secondary sleeve assembly, wherein the main drill bit assembly comprises a main drill rod and a main drill bit arranged at the front end of the main drill rod; the secondary casing assembly comprises a circular hollow casing and the secondary drill bit assembly comprises a secondary drill bit; circular hollow casing with vice drill bit overlaps in proper order to be put on main drilling rod and circular hollow casing and vice drill bit do not rotate along with main drilling rod, vice drill bit is fixed at circular hollow casing front end and is located main drill bit upper portion, the both sides of vice drill bit have the cutting edge of the gradual change of sword width of symmetry, and the cutting edge extends to outside vice drill bit and the circular hollow casing, and the narrower one end of cutting edge is located circular hollow casing front end, and the broad one end of cutting edge is located vice drill bit front end.
Furthermore, two bent hollow thin round rods are symmetrically fixed on two sides of the tail end of the round hollow sleeve.
Furthermore, the cutting edge on the auxiliary drill bit and the two hollow thin round rods on the round hollow sleeve are in a cross-shaped vertical shape in space.
Furthermore, grooves for embedding the cutting edges are formed in two sides of the front end of the circular hollow sleeve.
Furthermore, a strip-shaped hole is formed in the pipe wall of the circular hollow sleeve at a distance from one end of the pipe wall.
Compared with the prior art, the main drill rod can drive the main drill bit to excavate the main hole forwards on the tunnel face; the circular hollow sleeve and the auxiliary drill bit fixed at the front end of the circular hollow sleeve are sleeved on the main drill rod, a worker fixes the directions of the auxiliary sleeve and the cutting edge on the auxiliary drill bit through a hollow slender round rod welded at the other end of the auxiliary sleeve, and the circular hollow sleeve and the auxiliary drill bit do not rotate along with the rotation of the main drill rod; the final hole forming shape of the deformed drill bit is a circular main hole and two symmetrical nicks are additionally arranged, and the symmetrical nick direction of the special-shaped hole is the main direction of the energy release of the cartridge, so that the energy release towards the fixed direction during blasting is facilitated; adjust the cutting edge direction through the hollow thin round bar of circular hollow sleeve pipe one end welded of adjustment, consequently can select the symmetry nick direction in opposite sex hole unanimous with the line center direction in two adjacent holes or be close, so can effectively reduce the wall body thickness between the adjacent dysmorphism hole, it is at continuous drilling in-process, can carry out angle adjustment according to the tunnel line of drenching just, guaranteed that the crack breaks off the rock mass along the line center, form an annular blasting route along the tunnel boundary line after making the blasting, in order to realize improving excavation effect, reduce the purpose of the super short of digging phenomenon.
Drawings
FIG. 1 is a top view of a deformed drill bit of the present invention.
Fig. 2 is a side view of fig. 1.
Fig. 3 is a cross-sectional view of the sub-bit.
Fig. 4 is a schematic view of the overall structure of the sub-drill bit assembly.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. The specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
As shown in fig. 1 to 4, a modified drill bit of the present embodiment, which is mounted on a drilling machine for blasting excavation of a tunnel face, includes a main drill bit assembly including a main drill rod 300 and a main drill bit mounted at a front end of the main drill rod 300 for drilling a main hole forward on a tunnel smooth face; also included are secondary drill bit assembly 100 and secondary casing assembly 200; the secondary casing assembly comprises a circular hollow casing 210, the secondary drill bit assembly comprising a secondary drill bit 120; circular hollow sleeve 210 with vice drill bit 120 overlaps in proper order and puts on main drilling rod 300 and circular hollow sleeve 210 and vice drill bit 120 do not rotate along with main drilling rod, vice drill bit 120 is fixed at circular hollow sleeve 210 front end and is located main drill bit upper portion, the both sides of vice drill bit have the blade of the gradual change of the sword width of symmetry, and the blade extends to outside vice drill bit and the circular hollow sleeve 210, and the narrower one end 130 of blade is located circular hollow sleeve 210 front end, and the recess that is used for imbedding the blade is offered to circular hollow sleeve 210 front end both sides, and the broad one end 110 of blade is located vice drill bit front end. The blades on both sides are used to make the drilled hole form a heterogeneous hole to improve the blasting effect.
In the actual use process, two curved hollow thin round rods 220 are symmetrically fixed at two sides of the tail end of the round hollow sleeve 210; the blades of the secondary drill 120 are spatially cross-perpendicular to the two hollow thin round rods 220 of the round hollow sleeve 210. When actually carrying out tunnel face excavation work, the workman of being convenient for can manual control cutting edge direction on the vice drill bit lets tunnel face all ring edge reason eyes excavation accomplish the back, and the cutting edge can be formed with one and moves towards the different nature hole trend of roughly unanimity along tunnel design contour line, can make the comparatively concentrated like both sides cutting edge direction release of energy of blasting, can improve tunnel excavation effect, reduces the super short phenomenon of digging.
In the actual use process, a strip-shaped hole 230 is formed at each end of the wall of the circular hollow sleeve 210. Can alleviate the whole weight of vice sheathed tube is convenient for alleviate workman's working strength in actual tunnel face excavation work for tunnel face excavation speed, raises the efficiency.
When the deformation drill bit is used, after the main drill rod is arranged on the drilling machine, the drilling machine is started to drive the main drill rod, and the main drill rod can drive the main drill bit to excavate a main hole forwards on a tunnel face; the circular hollow sleeve and the auxiliary drill bit fixed at the front end of the circular hollow sleeve are sleeved on the main drill rod, a worker fixes the directions of the auxiliary sleeve and the cutting edge on the auxiliary drill bit through a hollow slender round rod welded at the other end of the auxiliary sleeve, and the circular hollow sleeve and the auxiliary drill bit do not rotate along with the rotation of the main drill rod; the final hole forming shape of the deformed drill bit is a circular main hole and two symmetrical nicks are additionally arranged, and the symmetrical nick direction of the special-shaped hole is the main direction of the energy release of the cartridge, so that the energy release towards the fixed direction during blasting is facilitated; adjust the cutting edge direction through the hollow thin round bar of circular hollow sleeve pipe one end welded of adjustment, consequently can select the symmetry nick direction in opposite sex hole unanimous with the line center direction in two adjacent holes or be close, so can effectively reduce the wall body thickness between the adjacent dysmorphism hole, it is at continuous drilling in-process, can carry out angle adjustment according to the tunnel line of drenching just, guaranteed that the crack breaks off the rock mass along the line center, form an annular blasting route along the tunnel boundary line after making the blasting, in order to realize improving excavation effect, reduce the purpose of the super short of digging phenomenon.
The technical solution of the present invention is not limited to the limitations of the above specific embodiments, and all technical modifications made according to the technical solution of the present invention fall within the protection scope of the present invention.
Claims (5)
1. The deformation drill bit comprises a main drill bit assembly, a main drill bit and a secondary sleeve assembly, wherein the main drill bit assembly comprises a main drill rod and a main drill bit arranged at the front end of the main drill rod; the secondary casing assembly comprises a circular hollow casing and the secondary drill bit assembly comprises a secondary drill bit; circular hollow casing with vice drill bit overlaps in proper order to be put on main drilling rod and circular hollow casing and vice drill bit do not rotate along with main drilling rod, vice drill bit is fixed at circular hollow casing front end and is located main drill bit upper portion, the both sides of vice drill bit have the cutting edge of the gradual change of sword width of symmetry, and the cutting edge extends to outside vice drill bit and the circular hollow casing, and the narrower one end of cutting edge is located circular hollow casing front end, and the broad one end of cutting edge is located vice drill bit front end.
2. The deformation drill bit of claim 1, wherein: two bent hollow thin round rods are symmetrically fixed on two sides of the tail end of the round hollow sleeve.
3. The deformation drill bit of claim 2, wherein: the cutting edge on the auxiliary drill bit and the two hollow thin round rods on the round hollow sleeve are in a cross-shaped vertical shape in space.
4. The deformation drill bit of claim 1, wherein: and grooves for embedding the cutting edges are formed in two sides of the front end of the circular hollow sleeve.
5. The deformation drill bit of claim 1, wherein: a strip-shaped hole is formed in the pipe wall of the circular hollow sleeve at a distance of one end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011614957.7A CN112814560A (en) | 2020-12-30 | 2020-12-30 | Deformation drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011614957.7A CN112814560A (en) | 2020-12-30 | 2020-12-30 | Deformation drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112814560A true CN112814560A (en) | 2021-05-18 |
Family
ID=75855453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011614957.7A Pending CN112814560A (en) | 2020-12-30 | 2020-12-30 | Deformation drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112814560A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3136464A1 (en) * | 1980-09-24 | 1982-06-16 | Kennametal Inc., 15650 Latrobe, Pa. | "DRILLING CHISES, ESPECIALLY GROOVING CHISELS FOR BLASTING BOLTS AND CUTTING INSERT FOR SUCH CHISELS" |
| US4549615A (en) * | 1982-07-12 | 1985-10-29 | Kennametal Inc. | Single-pass notching and drilling tool and method of drilling a blast role therewith |
| CN2053234U (en) * | 1989-04-27 | 1990-02-21 | 中国矿业大学 | Slotted drill bit for hidden-hole driller and its slotting device |
| CN2184780Y (en) * | 1994-04-05 | 1994-12-07 | 周军付 | Directional plane surface explosive drill |
| CN201687394U (en) * | 2010-06-07 | 2010-12-29 | 张志呈 | Secondary slotting drill |
| CN105952384A (en) * | 2016-06-23 | 2016-09-21 | 大同煤矿集团有限责任公司 | Hydraulic fracture orthogonal combination double-edge grooving drill bit |
| CN110685683A (en) * | 2019-10-28 | 2020-01-14 | 河南理工大学 | Top-releasing device and method for front-mixing type abrasive water jet flow directional cutting top plate |
| CN110685607A (en) * | 2019-11-14 | 2020-01-14 | 重庆国翔新材料有限公司 | Deformation drill bit and drilling machine |
| CN213869886U (en) * | 2020-12-30 | 2021-08-03 | 重庆国翔新材料有限公司 | Deformation drill bit |
-
2020
- 2020-12-30 CN CN202011614957.7A patent/CN112814560A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3136464A1 (en) * | 1980-09-24 | 1982-06-16 | Kennametal Inc., 15650 Latrobe, Pa. | "DRILLING CHISES, ESPECIALLY GROOVING CHISELS FOR BLASTING BOLTS AND CUTTING INSERT FOR SUCH CHISELS" |
| US4549615A (en) * | 1982-07-12 | 1985-10-29 | Kennametal Inc. | Single-pass notching and drilling tool and method of drilling a blast role therewith |
| CN2053234U (en) * | 1989-04-27 | 1990-02-21 | 中国矿业大学 | Slotted drill bit for hidden-hole driller and its slotting device |
| CN2184780Y (en) * | 1994-04-05 | 1994-12-07 | 周军付 | Directional plane surface explosive drill |
| CN201687394U (en) * | 2010-06-07 | 2010-12-29 | 张志呈 | Secondary slotting drill |
| CN105952384A (en) * | 2016-06-23 | 2016-09-21 | 大同煤矿集团有限责任公司 | Hydraulic fracture orthogonal combination double-edge grooving drill bit |
| CN110685683A (en) * | 2019-10-28 | 2020-01-14 | 河南理工大学 | Top-releasing device and method for front-mixing type abrasive water jet flow directional cutting top plate |
| CN110685607A (en) * | 2019-11-14 | 2020-01-14 | 重庆国翔新材料有限公司 | Deformation drill bit and drilling machine |
| CN213869886U (en) * | 2020-12-30 | 2021-08-03 | 重庆国翔新材料有限公司 | Deformation drill bit |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210518 |
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| RJ01 | Rejection of invention patent application after publication |