CN201874469U - Large-diameter composite-structure drill bit applicable to drilling argillaceous-cementing floated-rock stratum - Google Patents
Large-diameter composite-structure drill bit applicable to drilling argillaceous-cementing floated-rock stratum Download PDFInfo
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- CN201874469U CN201874469U CN2010206496972U CN201020649697U CN201874469U CN 201874469 U CN201874469 U CN 201874469U CN 2010206496972 U CN2010206496972 U CN 2010206496972U CN 201020649697 U CN201020649697 U CN 201020649697U CN 201874469 U CN201874469 U CN 201874469U
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- scraper
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- drill bit
- cutter
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Abstract
The utility model relates to a large-diameter composite-structure drill bit which is applicable to drilling an argillaceous-cementing floated-rock stratum, which relates to the technical field of underground construction and aims to solve the technical problem of improving the drilling efficiency. The drill bit comprises a rotary cutter disk, a plurality of hobs and a plurality of scrapers, wherein the hobs and the scrapers are uniformly distributed on the cutter disk. The disk surface of the cutter disk is a plane, residue-discharging ports for discharging residue soil are drilled on the disk surface of the cutter disk, the scrapers and the hobs are in one-to-one correspondence, and each scraper is installed at a post-order position following the corresponding hob of each scraper along the rotating direction of the cutter disk when in drilling; and each scraper comprises a scraper plate, a reinforced rib plate and a hard-alloy cutter head, wherein the bottom edge of the scraper plate is fixedly connected with the cutter disk, the plate surface of the scraper plate is vertical to the disk surface of the cutter disk, the hard-alloy cutter head is fixed at the top end of the scraper plate, the reinforced rib plate is respectively and fixedly connected with the cutter disk and the scraper plate, and the plate surface of the reinforced rib plate is vertical to the disk surface of the cutter disk and the plate surface of the scraper plate. The drill bit provided by the utility model is applicable to the large-diameter and large-depth drilling construction of a boulder-clay stratum.
Description
Technical field
The utility model relates to construction project pile foundation construction technology, particularly relates to a kind of drill bit structure technology that major diameter pore-forming that argillaceous agglutination floats pebble layer creeps into that is used for.
Background technology
In major diameters such as pile foundation, vertical shaft for mine, big deep drilling construction, run into the ovum gravel of argillaceous agglutination or float pebble layer through regular meeting; the ovum gravel of this argillaceous agglutination, float boulder bed and mostly be glaciofluvial deposit; formation particles utmost point heterogeneity; greatly to float cobble, little to the clay chaotic deposit together; the sorting extreme difference; the stratum is closely knit, the drillability extreme difference.Along with the development of boring to super dark and super-large diameter direction, how improving slewing drilling machine, to float drilling efficiency in the ovum stratum at argillaceous agglutination be a difficult problem of needing solution in constructing badly.
The existing employed major diameter drill bit of slewing drilling machine mainly contains two kinds, and is a kind of for the roller cutter bit of a plurality of hobboing cutters is housed on the cutterhead, another kind of for the broach drag bit of a plurality of scrapers is housed on the cutterhead.
Adopt roller cutter bit creep into argillaceous agglutination ovum gravel, when floating pebble layer, the hard cobble that floats can be impacted crushing by the cutter tooth of each hobboing cutter on the cutterhead and shears, the slag-drip opening that forms after the particle diameter smaller particles from the drill bit is discharged.But because the cutter tooth tooth pitch of hobboing cutter is all less; and the velocity of rotation of hobboing cutter is very slow; therefore after the cutter tooth of hobboing cutter is pressed into the stratum; the cohesive soil that cobble is floated in gluing sticks between the cutter tooth easily, can cause effective tooth depth of hobboing cutter cutter tooth to reduce, thereby reduce its efficiency of breaking rock; increased construction cost; when situation is serious in addition whole hobboing cutter be attached cohesive soil and all wrap up, thereby can't rotate and cobble is floated in fragmentation, this phenomenon is commonly called as " stick with paste and bore " in construction.
Adopt the broach drag bit to creep into argillaceous agglutination ovum gravel, when floating pebble layer, scrape jet blade can be under the axial compression effect contract go into the stratum viscosity binder soil turned round cutting, and the less ovum gravel of some particle diameters can be peeled off out the back by scraper and directly discharge from slag-drip opening by anti-circulation from the stratum, but for some particle diameters big cobble or erratic boulder, the jet blade of scraping that is in the revolution cutting state not only is difficult to its fragmentation, on the contrary easily because of with float shaking of cobble and knock to make and scrape jet blade and burst apart or shake and take off, thereby influence is effectively crept into, and shortened the application life of cutter, increased construction cost, the cobble that floats of failing to be broken also is easy to stop up drilling rod, influences smooth deslagging.
The utility model content
At the defective that exists in the above-mentioned prior art, technical problem to be solved in the utility model provides a kind of drilling efficiency height, can prolong the application life of cutter, the argillaceous agglutination that is particularly useful for that reduces construction cost floats the major diameter composite construction drill bit that pebble layer is drilled to the hole.
In order to solve the problems of the technologies described above, a kind of argillaceous agglutination that is applicable to provided by the utility model floats the major diameter composite construction drill bit that pebble layer is drilled to the hole, the cutterhead that comprises rotation, reach a plurality of hobboing cutters that evenly are laid on the cutterhead, the card of described cutterhead is the plane, and its card has the slag-drip opening that is used to discharge dregs, it is characterized in that: described cutterhead is provided with a plurality of scrapers, its quantity is consistent with the quantity of hobboing cutter, the corresponding hobboing cutter of scraper, each scraper all cutterhead direction of rotation when creeping into is installed in the postorder position that follows its corresponding hobboing cutter on the cutterhead closely;
Described scraper comprises scrapes knife plate, deep floor and carbide bit, described base and the cutterhead of scraping knife plate is affixed, its plate face is perpendicular to the card of cutterhead, described carbide bit is fixed on the top of scraping knife plate, described deep floor and cutterhead, to scrape knife plate respectively affixed, and its plate face is perpendicular to the card of cutterhead and scrape the plate face of knife plate.
Further, the described thickness of scraping knife plate is 30 ± 5mm.
Further, the spacing between the top of described carbide bit and the cutterhead card is Duoed 20 ± 5mm than the spacing between hobboing cutter top and the cutterhead card.
The argillaceous agglutination that is particularly useful for that the utility model provides floats the major diameter composite construction drill bit that pebble layer is drilled to the hole, owing on cutterhead, follow the postorder position of each hobboing cutter closely a scraper is housed all, utilize hobboing cutter can broken particle diameter bigger, the hard cobble that floats, utilize the cohesive soil and the sand of scraper machinable particulate, because it is bigger that hobboing cutter touches particle diameter prior to scraper, the hard cobble that floats, therefore particle diameter is bigger, the hard cobble that floats can not shake with scraper and knocks, under the shear action of scraper, cohesive soil also is not easy to stick between the cutter tooth of hobboing cutter, cooperation by hobboing cutter and scraper, can give full play to the advantage of two kinds of broken rock cutters, improve the rate of penetration and the drilling efficiency on mud drum gravel stratum greatly, and can prolong application life of each cutter, reduce construction cost.
Description of drawings
Fig. 1 is that the argillaceous agglutination that is applicable to of the utility model embodiment floats the vertical view that pebble layer is drilled to the major diameter composite construction drill bit in hole;
Fig. 2 is that the argillaceous agglutination that is applicable to of the utility model embodiment floats the scraper in the major diameter composite construction drill bit that pebble layer is drilled to the hole and the lateral view of corresponding hobboing cutter thereof.
The specific embodiment
Below in conjunction with description of drawings embodiment of the present utility model is described in further detail, but present embodiment is not limited to the utility model, every employing analog structure of the present utility model and similar variation thereof all should be listed protection domain of the present utility model in.
As shown in Figure 1, a kind of argillaceous agglutination that is applicable to that the utility model embodiment is provided floats the major diameter composite construction drill bit that pebble layer is drilled to the hole, the cutterhead 1 that comprises rotation, reach a plurality of hobboing cutters 2 that evenly are laid on the cutterhead 1, the card of described cutterhead 1 is the plane, and its card has the slag-drip opening 4 that is used to discharge dregs, it is characterized in that: described cutterhead 1 is provided with a plurality of scrapers 3, its quantity is consistent with the quantity of hobboing cutter 2, scraper 3 corresponding hobboing cutters 2, each scraper 3 all cutterhead direction of rotation when creeping into is installed in the postorder position that follows its corresponding hobboing cutter 2 on the cutterhead closely;
As shown in Figure 2, described scraper 3 comprises scrapes knife plate 31, deep floor 32 and carbide bit 33, described base and the cutterhead 1 of scraping knife plate 31 is affixed, its plate face is perpendicular to the card of cutterhead 1, described carbide bit 33 is fixed on the top of scraping knife plate 31, described deep floor 32 and cutterhead 1, to scrape knife plate 31 affixed respectively, and its plate face is perpendicular to the card of cutterhead 1 and scrape the plate face of knife plate 31.
Among the utility model embodiment, the described thickness of scraping knife plate is 30 ± 5mm, and described carbide bit is the YG8 serial carbide alloy, and the spacing between the top of carbide bit and the cutterhead card is Duoed 20 ± 5mm than the spacing between hobboing cutter top and the cutterhead card.
The utility model embodiment cooperates the rig that has hollow drill pipe to use, its job practices adopts anti-circulation revolution drilling method, hollow drill pipe and cutterhead with rig during use are coupling, the inner chamber of drilling rod is communicated with slag-drip opening on the cutterhead, drilling rod drive cutterhead by rig rotates and creeps into, the cobble that floats that particle diameter is bigger in the stratum is crushed by the cutter tooth impact of each hobboing cutter on the cutterhead, be cut into the particle diameter smaller particles, the carbide bit that follows the scraper of hobboing cutter closely is cut the stratum under the pressure of the drill effect, and cobble glued soil layer is on every side floated in the revolution cutting, the gravel that the released part particle diameter is less relatively and by the rock grain chip of hobboing cutter fragmentation, by hobboing cutter and scraper fragmentation, the ground particle that cuts and peel off is in company with drilling mud, slag-drip opening through being opened in the cutterhead card enters the inner chamber of hollow drill pipe, in time discharges the boring outside with anti-endless form again.
Anti-circulation revolution drilling method described in the utility model embodiment is a prior art.
The utility model embodiment is in conjunction with anti-circulation deslagging technology, can be widely used in the drilling construction of major diameters such as bored pile, the super dark aeration well of sewerage treatment, vertical shaft for mine, the big degree of depth, raising drilling efficiency, reduction construction cost are had tangible comparative advantages.
Claims (3)
1. one kind is applicable to that argillaceous agglutination floats the major diameter composite construction drill bit that pebble layer is drilled to the hole, the cutterhead that comprises rotation reaches a plurality of hobboing cutters that evenly are laid on the cutterhead, the card of described cutterhead is the plane, and its card has the slag-drip opening that is used to discharge dregs, it is characterized in that: described cutterhead is provided with a plurality of scrapers, its quantity is consistent with the quantity of hobboing cutter, the corresponding hobboing cutter of scraper, each scraper all cutterhead direction of rotation when creeping into is installed in the postorder position that follows its corresponding hobboing cutter on the cutterhead closely;
Described scraper comprises scrapes knife plate, deep floor and carbide bit, described base and the cutterhead of scraping knife plate is affixed, its plate face is perpendicular to the card of cutterhead, described carbide bit is fixed on the top of scraping knife plate, described deep floor and cutterhead, to scrape knife plate respectively affixed, and its plate face is perpendicular to the card of cutterhead and scrape the plate face of knife plate.
2. the argillaceous agglutination that is applicable to according to claim 1 floats the major diameter composite construction drill bit that pebble layer is drilled to the hole, and it is characterized in that: the described thickness of scraping knife plate is 30 ± 5mm.
3. the argillaceous agglutination that is applicable to according to claim 1 floats the major diameter composite construction drill bit that pebble layer is drilled to the hole, it is characterized in that: the spacing between the top of described carbide bit and the cutterhead card, Duo 20 ± 5mm than the spacing between hobboing cutter top and the cutterhead card.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206496972U CN201874469U (en) | 2010-12-09 | 2010-12-09 | Large-diameter composite-structure drill bit applicable to drilling argillaceous-cementing floated-rock stratum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206496972U CN201874469U (en) | 2010-12-09 | 2010-12-09 | Large-diameter composite-structure drill bit applicable to drilling argillaceous-cementing floated-rock stratum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201874469U true CN201874469U (en) | 2011-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206496972U Expired - Lifetime CN201874469U (en) | 2010-12-09 | 2010-12-09 | Large-diameter composite-structure drill bit applicable to drilling argillaceous-cementing floated-rock stratum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201874469U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103993836A (en) * | 2014-06-04 | 2014-08-20 | 梁振西 | Drill bit for hole drilling in large-diameter pile of bridge foundation |
-
2010
- 2010-12-09 CN CN2010206496972U patent/CN201874469U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103993836A (en) * | 2014-06-04 | 2014-08-20 | 梁振西 | Drill bit for hole drilling in large-diameter pile of bridge foundation |
| CN103993836B (en) * | 2014-06-04 | 2016-07-13 | 梁振西 | Drill bit for the boring of bridge foundation large diameter pile |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 201700 Shanghai city Qingpu District No. 599 new road, building 1, room 869 Patentee after: SHANGHAI GUANGLIAN ENVIRONMENTAL & GEOTECHNICAL ENGINEERING CO., LTD. Address before: 201700 Shanghai city Qingpu District No. 599 new road, building 1, room 869 Patentee before: Shanghai Guanglian Building Development Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20110622 |
|
| CX01 | Expiry of patent term |