CN201687394U - Secondary slotting drill - Google Patents
Secondary slotting drill Download PDFInfo
- Publication number
- CN201687394U CN201687394U CN2010202214021U CN201020221402U CN201687394U CN 201687394 U CN201687394 U CN 201687394U CN 2010202214021 U CN2010202214021 U CN 2010202214021U CN 201020221402 U CN201020221402 U CN 201020221402U CN 201687394 U CN201687394 U CN 201687394U
- Authority
- CN
- China
- Prior art keywords
- grooving
- housing
- casing
- piece
- hole
- 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.)
- Expired - Fee Related
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Abstract
A secondary slotting drill comprises a connecting shaft (2) and a casing (5), wherein one end of the connecting shaft (2) is connected with a drill rod (1), the other end face of the connecting shaft (2) is provided with an annular groove and a connecting rod in the center, a hole is arranged at the bottom of the casing (5), the connecting rod penetrates through the hole to connect the casing (5) with the connecting shaft (2) through a fastening nut (6), slots are symmetrically arranged on two lateral walls of the casing (5), two alloy support blocks (4) are installed in the slots, one end of each alloy support block (4) is embedded into the annular groove while the other end is embedded into the casing (5), each alloy support block (4) is provided with a slotting cutter (3) in a fixed manner, and the slotting cutter (3) penetrates through one slot to extend out of the lateral wall of the casing (5). The secondary slotting drill is characterized in that the edge of the slotting cutter (3) extending out of the lateral wall of the casing (5) is gradually inclined outward from top to bottom, and an expander device (7) is connected between the two alloy support blocks (4).
Description
One, technical field:
The utility model relates to a kind of secondary grooving drill bit that is used for rock blasting big gun hole.
Two, background technology:
The essence of rock blasting is to produce new crackle around explosion wave makes the big gun hole, acts on the most advanced and sophisticated stress that produces of crackle (comprising the protolith crackle) at detonation gas and concentrates or the wedge effect, and rock crackle forming expansion and throwing are unloaded.Utilize this mechanism, be used for breaking controlled blasting, the axial grooving in both sides, circular big gun hole on the line direction of Loose Blasting hole, promptly precrack is called the grooving shot hole blasting like this, is called for short the grooving explosion.
The grooving technology of grooving explosion has two classes.One class is that boring is once finished with grooving, i.e. a grooving method; Another kind of is grooving, i.e. secondary grooving method after the boring earlier.Extensively adopt the secondary grooving method at present.But move back grooving pricker often very difficult (promptly moving back the pricker difficulty) in the secondary grooving technology.
Three, summary of the invention:
The purpose of this utility model is the deficiency at the prior art scheme, by the technological improvement to equipment, provides a kind of secondary grooving drill bit that moves back pricker easily.
The technical solution of the utility model is, a kind of secondary grooving drill bit, comprise that one one end is used to connect drill steel, other end end face has cannelure and is provided with the connecting axle of connecting rod at the end face center, there is a housing bottom to have the hole, connecting rod is connected housing by hold-doun nut after passing this hole with connecting axle, symmetry has slotted eye on the housing two side, two blocks of alloys are housed in the slotted eye prop up piece, the end that alloy props up piece is embedded in the cannelure and the other end is embedded in the housing, every block of alloy props up and is fixed with the grooving cutlery on the piece, the grooving cutlery passes outside the sidewall that slotted eye stretches out housing, it is characterized in that stretching out the cutting edge progressively outward-dipping from top to down (promptly the cutting edge external diameter of grooving cutlery progressively becomes big from top to down) of the outer grooving cutlery of the sidewall of housing, and prop up at two blocks of alloys and to be connected with the expansion bend device between the piece.
Further scheme is: the expansion bend device is a spring.
The utility model has the advantages that: be connected with expansion bend device (spring) between the piece owing to propping up at two blocks of alloys, under the acting in conjunction of big gun hole wall and expansion bend device (spring), the grooving cutlery is forced to inside contraction when moving back pricker, thereby reaches the purpose of moving back pricker easily.
This secondary grooving drill bit structure is simple, be easy to make, can be supporting with ordinary rock drill, and can on the big gun hole wall of accomplishing fluently, cut a hole and cut out vee-cut, be effective rock drilling equipment of realization Directional Fracture Controlled Blasting.
Be applicable to controlled blastings such as the peripheral shot hole blasting of stone head (tunnel), side slope controlled Short Hole Blasting, stone mining, rock bulk crushing; Compare with general smooth blasting, presplit blasting, borehole spacing can increase 30%-100%; The country rock amount of backbreaking reduces 10%-13%, and eye trace rate increases 20%-70%, reduces the damage of country rock greatly, reduces the maintenance cost of shaft and drift supporting expense and side slope, and the drilling and blasting direct cost can reduce about 1/4.
Description of drawings:
Fig. 1 is the cross-sectional view of an embodiment of the present utility model.It also is A-A ' sectional view of Fig. 2 and Fig. 3.
Fig. 2 is B-B ' sectional view of Fig. 1.
Fig. 3 is C-C ' sectional view of Fig. 1.
Among the figure: the 1st, drill steel, the 2nd, connecting axle, the 3rd, grooving cutlery, the 4th, alloy prop up piece, the 5th, housing, the 6th, hold-doun nut, the 7th, expansion bend device (spring).
Five. the specific embodiment
Provide an embodiment of the present utility model below.
As Fig. 1, Fig. 2 and Fig. 3: a kind of secondary grooving drill bit, comprise that one one end is used to connect drill steel 1, other end end face has cannelure and is provided with the connecting axle 2 of connecting rod at the end face center, there are a housing 5 bottoms to have the hole, connecting rod is connected housing 5 by hold-doun nut 6 after passing this hole with connecting axle 2, symmetry has slotted eye on housing 5 two sides, two blocks of alloys are housed in the slotted eye prop up piece 4, the end that alloy props up piece 4 is embedded in the cannelure and the other end is embedded in the housing 5, every block of alloy props up and is fixed with grooving cutlery 3 on the piece 4, grooving cutlery 3 passes outside the sidewall that slotted eye stretches out housing 5, the cutting edge that stretches out the outer grooving cutlery 3 of the sidewall of housing 5 is progressively outward-dipping from top to down, and props up at two blocks of alloys and to be connected with expansion bend device (spring) 7 between the piece 4.
Claims (2)
1. secondary grooving drill bit, comprise that one one end is used to connect drill steel (1), other end end face has cannelure and is provided with the connecting axle (2) of connecting rod at the end face center, there is a housing (5) bottom to have the hole, connecting rod is connected housing (5) by hold-doun nut (6) after passing this hole with connecting axle (2), symmetry has slotted eye on housing (5) two side, two blocks of alloys are housed in the slotted eye prop up piece (4), the end that alloy props up piece (4) is embedded in the cannelure and the other end is embedded in the housing (5), every block of alloy props up and is fixed with grooving cutlery (3) on the piece (4), grooving cutlery (3) passes outside the sidewall that slotted eye stretches out housing (5), the cutting edge that it is characterized in that stretching out the outer grooving cutlery (3) of the sidewall of housing (5) is progressively outward-dipping from top to down, and props up at two blocks of alloys and to be connected with expansion bend device (7) between the piece (4).
2. secondary grooving drill bit according to claim 1 is characterized in that expansion bend device (7) is spring (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202214021U CN201687394U (en) | 2010-06-07 | 2010-06-07 | Secondary slotting drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202214021U CN201687394U (en) | 2010-06-07 | 2010-06-07 | Secondary slotting drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201687394U true CN201687394U (en) | 2010-12-29 |
Family
ID=43375678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202214021U Expired - Fee Related CN201687394U (en) | 2010-06-07 | 2010-06-07 | Secondary slotting drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201687394U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102261224A (en) * | 2011-08-09 | 2011-11-30 | 湖南省煤炭科学研究所 | Dragging-type screen hole breast wall drill bit |
| CN104191529A (en) * | 2014-09-04 | 2014-12-10 | 天峨县宏昌农机专业合作社 | Hydraulic stone split hole recessing machine |
| 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 |
| CN112814560A (en) * | 2020-12-30 | 2021-05-18 | 重庆国翔新材料有限公司 | Deformation drill bit |
-
2010
- 2010-06-07 CN CN2010202214021U patent/CN201687394U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102261224A (en) * | 2011-08-09 | 2011-11-30 | 湖南省煤炭科学研究所 | Dragging-type screen hole breast wall drill bit |
| CN104191529A (en) * | 2014-09-04 | 2014-12-10 | 天峨县宏昌农机专业合作社 | Hydraulic stone split hole recessing machine |
| 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 |
| CN105952384B (en) * | 2016-06-23 | 2018-04-24 | 大同煤矿集团有限责任公司 | Hydrofracturing Orthogonal Composite twolip slotting drill |
| CN112814560A (en) * | 2020-12-30 | 2021-05-18 | 重庆国翔新材料有限公司 | Deformation drill bit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101229 Termination date: 20130607 |