CN101812971B - Combined bit - Google Patents
Combined bit Download PDFInfo
- Publication number
- CN101812971B CN101812971B CN2010101282929A CN201010128292A CN101812971B CN 101812971 B CN101812971 B CN 101812971B CN 2010101282929 A CN2010101282929 A CN 2010101282929A CN 201010128292 A CN201010128292 A CN 201010128292A CN 101812971 B CN101812971 B CN 101812971B
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- China
- Prior art keywords
- cutter head
- interior
- cutter hub
- fin
- hilt
- 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.)
- Withdrawn - After Issue
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Abstract
The invention relates to a combined bit, comprising a rod body, an inner cutter body consisting of an inner cutter head and an inner cutter handle, wings and an outer cutter body consisting of an outer cutter body and an outer cutter handle, wherein the middle part of the rod body is provided with a grouting channel, and the inner cutter body is fixed at the lower end part of the rod body; the number of the wings is 2-6 and are uniformly distributed and fixed on the peripheral surface of the lower part of the rod body along the length direction thereof vertical to the direction of an axial central line of the rod body, and the outer cutter body is fixed on the wings; the inner cutter head in the inner cutter body and the outer cutter head in the outer cutter body are respectively welded the inner cutter handle with the outer cutter handle into a whole; the front ends of the inner cutter head and the outer cutter head are respectively provided with an inner cutting edge and an outer cutting edge; and the installation directions of the inner cutter body and the outer cutter body are rotating directions leading the inner cutter head and the outer cutter head to be installed toward the rod body. The combined bit realizes synchronous drilling and cutting of the inner cutter head and the outer cutter head, improves the operating efficiency multiply, has high bonding strength of the cutter heads and the cutter handles, reduces the wear condition of the cutter heads and the wings, and guarantees the quality of continuous walls after drilling holes.
Description
Technical field
The utility model relates to the especially composite drill bit on sandy soil stratum of a kind of ability penetrating ground, can be widely used in the needs of highrise building underground installation, subway station bracing of foundation pit and river dyke reinforcing and the improvement of weak soil base or the like underground deep foundation engineering.
Background technology
Go along with sb. to guard him in urban skyscraper, Deep Foundation Pit of Metro Stations, in the process of construction of underground infrastructures such as river dyke anti-seepage reinforcing and weak soil base improvement reinforcing; The a large amount of at present SMW worker of employing method equipment are built diaphragm wall; Promptly use multiple-drill press to bore pick continuously; And soil and cement paste mixed in situ stir and insert the technology that shaped steel is built the native mine dam of underground retaining, play that retaining is native, the antiseepage effect.
In the prior art, general drilling tool and the drill bit that adopts improved long-spiral drilling machine of the drill bit of multiple-drill press; Like a kind of novel drilling tool; The patent No. is ZL200720070011.2, and it is that two helical blades of employing are fixed on the drilling rod leading section, three row's cutter hub cross arrangements are fixed on technology such as 2 helical blade bases, cutter head body built-up welding tungsten carbide, when multiple-drill press carries out bore operation on harder sandy soil stratum; Can cause quality problems such as cutter edge serious wear, cutter head come off, blade wear fracture; Not only influence the efficiency of construction of bore operation, and make drilling quality unstable, directly influence the construction of diaphragm wall quality.
Summary of the invention
The purpose of the utility model is according to the deficiency that exists in the prior art, provides that a kind of drilling ability is strong, cutter head intensity is high, cutter head and the fin abrasion resistance is good, boring grooving quality height and operating efficiency significantly improve composite drill bit.
The utility model is realized through following technical scheme:
The utility model relates to a kind of composite drill bit, the interior cutter hub that comprises the body of rod, is made up of interior cutter head and interior hilt, fin, the outer cutter hub of being made up of outer cutter head and outer hilt; Wherein, be provided with grouting channel in the middle of the body of rod, interior cutter hub is fixed on the bottom of the body of rod; Fin has 2-6, is fixed in uniform way on the outer peripheral face of body of rod bottom with the longitudinal center line direction of the vertical drilling pipe of its length direction, and outer cutter hub is fixed on the fin; Interior cutter head in described in the cutter hub and the outer cutter head in the outer cutter hub are integrally welded with interior hilt and outer hilt respectively; Outer cutter hub is weldingly fixed in the bottom of fin through outer hilt; And outer cutter hub is equipped with 2～4 on each fin; Outside the cutter hub on the fin free end, the position of outer cutter hub is cross arrangement on position of rotation on the position of the outer cutter hub on each fin and another fin; The front end of interior cutter head and outer cutter head has interior cutting edge and outer cutting edge respectively; The installation direction of cutter hub and outer cutter hub is to make its interior cutter head be mounted to the direction of rotation towards the body of rod with outer cutter head in described.
The utility model can be, described in cutter hub have 2-4, the bottom of the said body of rod is provided with flange, interior cutter hub is weldingly fixed on the soffit place of the flange of the body of rod through interior hilt radial symmetric.
The utility model can also be that described interior cutter head adopts induction brazing technology to be weldingly fixed on the end of interior hilt and outer hilt respectively with outer cutter head.
The utility model can also be, the aerofoil of described each fin tilts in the same direction, with angle=50-70 ° of the longitudinal center line of the body of rod; Angle β=0-15 between the front end flange plane of the bottom of fin and the body of rod °, and they are to be weldingly fixed on the outer peripheral face of body of rod bottom.
The utility model can also be; Described outer cutter hub is weldingly fixed in the bottom of fin through outer hilt; And outer cutter hub is equipped with 2～4 on each fin; Outside the cutter hub on the fin free end, the position of outer cutter hub is cross arrangement on position of rotation on the position of the outer cutter hub on each fin and another fin.
The utility model can also be that described interior cutter head adopts the hard alloy steel material to process with outer cutter head.
The utility model can also be that described interior hilt, outer hilt and fin adopt the carbon steel or low alloy steel material to process.
The utility model can also be that the free end of described fin is and the arc surface of body of rod concentric that this arc surface is provided with netted wearing layer.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further described:
Fig. 1 is the structural representation of the utility model composite drill bit;
Fig. 2 is the upward view of Fig. 1;
Fig. 3 is that the A-A of Fig. 1 is to sectional view;
Fig. 4 is that the B-B of Fig. 1 is to sectional view.
The specific embodiment
Like Fig. 1, Fig. 2, Fig. 3 and shown in Figure 4, a kind of composite drill bit, the interior cutter hub 2 that comprises the body of rod 1, forms by interior cutter head 21 and interior hilt 22, fin 3, the outer cutter hub of forming by outer cutter head 41 and outer hilt 42 4; Wherein, be provided with grouting channel 11 in the middle of the body of rod 1, be used for the perfusion of cement paste; Interior cutter hub 2 is fixed on the bottom of the body of rod 1, and interior cutter hub 2 has 2-4, and the bottom of the body of rod 1 is provided with flange 13, and interior cutter hub 2 is weldingly fixed on the soffit place of the flange 11 of the body of rod 1 through interior hilt 22 radial symmetric; Fin 3 has 2-6, is fixed in uniform way on the outer peripheral face of the body of rod 1 bottom with the longitudinal center line direction of the vertical body of rod 1 of its length direction, and outer cutter hub 4 is fixed on the fin 3; The aerofoil 31 of each fin 3 tilts in the same direction, with angle=50-70 ° of the longitudinal center line of the body of rod 1; Between front end flange 11 planes of the bottom 32 of fin 3 and the body of rod 1 angle β=0-15 °, and they are to be weldingly fixed on the outer peripheral face 12 of the body of rod 1 bottom; The front end of interior cutter head 21 and outer cutter head 41 has interior cutting edge 211 and outer cutting edge 411 respectively; The installation direction of cutter hub 2 and outer cutter hub 4 is that its interior cutter head 21 is mounted to towards the direction of rotation of the body of rod 1 with outer cutter head 41 in described; Interior cutter head 21 in the interior cutter hub 2 and the outer cutter head 41 in the outer cutter hub 4 are integrally welded with interior hilt 22 and outer hilt 42 respectively; Interior cutter head 21 is processed with outer cutter head 41 usefulness hard alloy blocks; Adopt induction brazing technology to be weldingly fixed on the end of interior hilt 22 and outer hilt 42 respectively; The cutter head fracture that comes off appears in the adhesion strength of cutter head 21 and interior hilt 22 and outer cutter head 41 and outer hilt 42 in effectively increasing when cutting edge 211 is dug hard material such as stone in preventing at brill with outer cutting edge 411; Outer cutter hub 4 is weldingly fixed in the bottom 32 of fin 3 through outer hilt 42; And outer cutter hub 4 is equipped with 2～4 on each fin 3; Outside the cutter hub 4 on fin 3 free ends; The position of outer cutter hub 4 is cross arrangement on position of rotation on the position of the outer cutter hub 4 on each fin 3 and another fin 3; Promptly the fixed-site of an exclusive cutter hub 4 is arranged in the space of cutter hub 4 outside adjacent two at another, in drilling process, can dig earth and sandy soil by all also even ground auger to guarantee composite drill bit; Interior hilt 22, outer hilt 42 and fin 3 adopt the carbon steel or low alloy steel materials to process, and can increase its intensity; The free end of fin 3 is and the arc surface of the body of rod 1 concentric that this arc surface is provided with netted wearing layer 33, slows down the abrasion condition of fin 3, effectively improves the bored pile quality; The installation direction of interior cutter hub 2 and outer cutter hub 4 is that its interior cutter head 21 is mounted to towards the direction of rotation of the body of rod 1 with outer cutter head 41, up carries earth slurry or sandy soil slurry when helping bore operation.
The utility model composite drill bit through two layers of cutting of cutter hub on the end of the body of rod and front end cylindrical, being provided with and outer cutter hub cutter hub, can realize in the multiple-drill press drilling process that interior cutter head and outer cutter head synchronous drilling cut, and bore operation efficient significantly improves; Simultaneously cutter head adopts induction brazing technology to weld with hilt, has effectively improved the bond strength of cutter head and hilt, especially when harder sandy soil earth-boring operation, can avoid that cutter head comes off or bursts apart, the situation of cutter head and fin quick abrasion; On the free end arc surface of fin and body of rod concentric netted wearing layer is arranged, and guarantee the surface quality of diaphragm wall after the boring grooving.
Claims (5)
1. composite drill bit, the interior cutter hub (2) that comprises the body of rod (1), forms by interior cutter head (21) and interior hilt (22), fin (3), the outer cutter hub of forming by outer cutter head (41) and outer hilt (42) (4); Wherein, be provided with grouting channel (11) in the middle of the body of rod (1), interior cutter hub (2) is fixed on the bottom of the body of rod (1); Fin (3) has 2～6, is fixed in uniform way on the outer peripheral face of the body of rod (1) bottom with the longitudinal center line direction of the vertical body of rod of its length direction (1), and outer cutter hub (4) is fixed on the fin (3); Interior cutter head (21) and the outer cutter head (41) in the outer cutter hub (4) in described in the cutter hub (2) are integrally welded with interior hilt (22) and outer hilt (42) respectively; The front end of interior cutter head (21) and outer cutter head (41) has interior cutting edge (211) and outer cutting edge (411) respectively; The installation direction of cutter hub (2) and outer cutter hub (4) is that its interior cutter head (21) and outer cutter head (41) are mounted to towards the direction of rotation of the body of rod (1) in described; Described outer cutter hub (4) is weldingly fixed in the bottom (32) of fin (3) through outer hilt (42); And outer cutter hub (4) is equipped with 2～4 on each fin (3); Outside the cutter hub on fin (3) free end, the position that the position of the outer cutter hub (4) on each fin (3) and another fin (3) are gone up outer cutter hub (4) is cross arrangement on position of rotation.
2. a kind of composite drill bit according to claim 1; It is characterized in that described interior cutter hub (2) has 2～4; The bottom of the said body of rod (1) is provided with flange (13), and interior cutter hub (2) is weldingly fixed on the soffit place of the flange (13) of the body of rod (1) through interior hilt (22) radial symmetric.
3. a kind of composite drill bit according to claim 1 is characterized in that described interior cutter head (21) and outer cutter head (41) adopt induction brazing technology to be weldingly fixed on the end of interior hilt (22) and outer hilt (42) respectively.
4. according to claim 1 or 3 described a kind of composite drill bits, it is characterized in that described interior cutter head (21) and outer cutter head (41) adopt hard alloy blocks to process.
5. according to claim 1 or 3 described a kind of composite drill bits, it is characterized in that described interior hilt (22), outer hilt (42) and fin (3) adopt the carbon steel or low alloy steel material to process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101282929A CN101812971B (en) | 2010-03-17 | 2010-03-17 | Combined bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101282929A CN101812971B (en) | 2010-03-17 | 2010-03-17 | Combined bit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101812971A CN101812971A (en) | 2010-08-25 |
| CN101812971B true CN101812971B (en) | 2012-05-23 |
Family
ID=42620321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101282929A Withdrawn - After Issue CN101812971B (en) | 2010-03-17 | 2010-03-17 | Combined bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101812971B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359135B (en) * | 2011-09-15 | 2013-05-08 | 山东省水利科学研究院 | Grooving wall-forming drill bit for underground continuous wall |
| CN103939024B (en) * | 2014-04-29 | 2016-04-20 | 上海工程机械厂有限公司 | A kind of hard sand soil drill bit |
| CN103939021B (en) * | 2014-04-29 | 2016-07-06 | 上海工程机械厂有限公司 | A kind of sand soil 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 |
| CN106903488B (en) * | 2017-04-15 | 2018-10-09 | 肖功豪 | A kind of preparation method of geological drill bit |
| CN109252814B (en) * | 2018-11-21 | 2020-04-03 | 马鞍山金顺来工业设计有限公司 | Drill bit for oil development |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4838366A (en) * | 1988-08-30 | 1989-06-13 | Jones A Raymond | Drill bit |
| CN2037278U (en) * | 1988-09-23 | 1989-05-10 | 哈尔滨第二工具厂 | Dual blade rotary centre flat-inlaid compound bit |
| CN2207274Y (en) * | 1994-04-27 | 1995-09-13 | 张国德 | Bit for drilling wall |
| CN2288261Y (en) * | 1997-06-17 | 1998-08-19 | 鞠庆海 | Dual-purpose drilling broaching bit controlled by centrifugal wings |
| CN2325504Y (en) * | 1997-09-26 | 1999-06-23 | 王培林 | Geological cutting drill bit |
| CN1081281C (en) * | 1998-09-02 | 2002-03-20 | 王培林 | Drill bit |
| CN201024901Y (en) * | 2007-05-21 | 2008-02-20 | 上海工程机械厂有限公司 | A novel drilling tool |
-
2010
- 2010-03-17 CN CN2010101282929A patent/CN101812971B/en not_active Withdrawn - After Issue
Also Published As
| Publication number | Publication date |
|---|---|
| CN101812971A (en) | 2010-08-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120523 Effective date of abandoning: 20160506 |
|
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |