CN210178282U - Large-scale rock-breaking hob drill bit - Google Patents
Large-scale rock-breaking hob drill bit Download PDFInfo
- Publication number
- CN210178282U CN210178282U CN201921059374.5U CN201921059374U CN210178282U CN 210178282 U CN210178282 U CN 210178282U CN 201921059374 U CN201921059374 U CN 201921059374U CN 210178282 U CN210178282 U CN 210178282U
- Authority
- CN
- China
- Prior art keywords
- drill bit
- rotary table
- vertical section
- hob
- connecting rib
- 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.)
- Active
Links
Images
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model discloses a large rock breaking hob drill bit, which comprises a turntable positioned below a drill rod, wherein a pilot cylinder is arranged in the middle of the lower surface of the turntable in a protruding manner, and a plurality of first roller hobs are arranged on the ring surface of the bottom of the pilot cylinder; the lower surface of the rotary table on the outer edge of the guide cylinder forms a ring surface, the ring surface of the rotary table is provided with a plurality of wheel frames, each wheel frame is connected with a circular truncated cone hob through a shaft, and the shaft of each circular truncated cone hob forms an acute angle with the vertical direction. The large rock breaking hob drill bit is high in drilling efficiency and good in guidance quality.
Description
Technical Field
The utility model relates to a heavy-calibre pile foundation pore-forming construction technical field specifically says to a large-scale broken rock hobbing cutter drill bit, and more specifically says, this large-scale broken rock hobbing cutter drill bit is particularly useful for boring the stake hole of getting the diameter and surpassing 2.5m and rock strength and surpassing 60 Mpa.
Background
With the economic development and the technology of the civil engineering industry, the hole forming construction of the large-caliber pile foundation is more and more common, and the large caliber refers to a hole with the diameter of more than 2.5 m.
When heavy-calibre pile foundation pore-forming, often need strengthen pile foundation tip bearing capacity through the mode of inlaying the rock, ordinary drill bit is difficult to creep into the pore-forming in the stratum of high strength, and this just needs to use dedicated large-scale broken rock hobbing cutter drill bit.
The large rock breaking hob drill bit in the prior art comprises a rotary table connected to the bottom of a drill rod, and the lower surface of the rotary table is a plane and is provided with a plurality of roller hobs.
The large rock breaking hob drill bit in the prior art has the following defects: the drill bit is used for full-section drilling, and when the rock layer hardness is higher, such as more than 60Mpa, the drilling is difficult, the drilling efficiency is low, and the speed is low; in addition, as the whole section is drilled, the whole hole bottom rock surface needs to be drilled and crushed, so that the repeated crushing rate is high, and the drilling efficiency is further reduced; moreover, the drill bit lacks a centralizing device, and is easy to incline to cause the deflection of the drilled hole under the conditions of uneven hardness of stratum, development of rock stratum joints, inclination of rock surface and the like.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a large-scale broken rock hobbing cutter drill bit that creeps into efficiently and guidance quality is good.
The technical solution of the utility model is to provide a large rock breaking hob drill bit, which comprises a turntable positioned below a drill rod, wherein a pilot cylinder is protruded in the middle of the lower surface of the turntable, and a plurality of first roller hobs are arranged on the ring surface of the bottom of the pilot cylinder; the lower surface of the rotary table on the outer edge of the guide cylinder forms a ring surface, the ring surface of the rotary table is provided with a plurality of wheel frames, each wheel frame is connected with a circular truncated cone hob through a shaft, and the shaft of each circular truncated cone hob forms an acute angle with the vertical direction.
Compared with the prior art, the large rock breaking hob drill bit adopting the structure has the following advantages.
When the drill bit drills downwards, the first roller cutter hob on the bottom ring surface of the pilot cylinder firstly drills a rock stratum, the full-section drilling of the drill bit in the prior art is changed into annular-section drilling, the cutting and grinding area is obviously reduced, the pressure intensity of the first roller cutter hob during drilling is further increased, the first roller cutter hob is easy to drill, and therefore the drilling efficiency is high; after the first roller cutter hob drills, the pilot cylinder immediately enters to play a role of centralizing the drill bit so as to guide the drill bit to vertically drill downwards; just as the first roller cutter on the bottom ring surface of the pilot cylinder firstly drills to destroy the integrity of the rock stratum, the stress release of the rock stratum is realized, the hardness of the rock stratum is reduced, the crushing efficiency of the later-drilled roller cutter is improved, and the drilling efficiency is further improved; and the shaft of the cone hob and the vertical direction form an acute angle, so that the whole ring of cone hob and the ring of first cone hob form a cone with a large top and a small bottom, the centralizing and guiding effect of the cone hob is further enhanced, and the drill bit is further ensured to drill vertically.
Preferably, the outermost edge of the lower surface of the rotary table is provided with a plurality of second cone roller cutters, so that three-stage crushing of two rings of cone roller cutters and one ring of truncated cone roller cutters is realized, and the drilling efficiency of the drill bit is higher; and the third-order hob, namely the second cone hob, the circular truncated cone hob and the first cone hob, also form a cone with a large upper part and a small lower part, so that the centralizing effect is further enhanced on the whole, and the drill bit is further ensured to drill downwards vertically.
Preferably, the middle part of the upper surface of the rotary table is provided with a core barrel, the central hole of the core barrel is communicated with the central hole of the pilot barrel and penetrates through the rotary table, the upper part of the inner surface of the core barrel is fixedly provided with a pressing plate which rises spirally, and the thickness of the pressing plate is reduced from top to bottom, so when the drill bit drills down, the rock in the middle of the drill hole is cylindrical in the core barrel and continuously rises relative to the core barrel, when the columnar rock in the core barrel contacts the pressing plate, the rock in the core barrel can gradually incline along with the pressing plate which rises spirally, the columnar rock is easy to break due to the brittleness of the rock, and the drill bit brings the broken columnar rock in the core barrel back to the ground, so the rock in the core barrel is taken away without being broken by the drill bit, namely, the full-section drilling is not needed, the repeated breaking rate is reduced, and the drilling efficiency is further improved.
Preferably, the drill further comprises a plurality of retaining rings which are distributed at intervals in the axial direction, and all the retaining rings are positioned above the rotary table; the upper surface of the rotary table is provided with a plurality of connecting rib plates extending along the axial direction, all the connecting rib plates are uniformly distributed along the circumferential direction of the coring barrel, the inner surface of each check ring is fixed with the outer side of each connecting rib plate, and the outer surface of the coring barrel is also fixed with the inner side of each connecting rib plate, so that the multi-layer check ring effectively increases the righting height of the drill rod, the drill bit is further ensured to be stably and vertically drilled downwards, and the working efficiency is ensured; and the connecting rib plate fixes the rotary disc, the coring barrel and all the check rings together, so that the drill bit has better integrity, namely the integral strength of the drill bit is enhanced.
Preferably, the part of each connecting rib plate, which exceeds the uppermost retainer ring, is a trapezoid with a small upper part and a large lower part, and the upper ends of all the connecting rib plates are jointly fixed with an upper flange plate for being butted with the lower flange plate of the drill rod.
Preferably, the drilling bit further comprises a slag discharging pipe, wherein the slag discharging pipe is formed by sequentially communicating an upper vertical section, a middle inclined section and a lower vertical section, the lower vertical section penetrates through the rotary table and is welded with the rotary table, the lower vertical section is welded with the inner surface of the retainer ring, the upper vertical section penetrates through the middle part of the upper flange plate and is welded with the upper flange plate, and a slag discharging channel of the upper vertical section is communicated with the central hole of the drill rod, so that slag discharging substances can be discharged through the slag discharging channel of the slag discharging pipe in the drilling process of the drilling bit, the repeated crushing rate is further reduced, and the drilling efficiency is further improved; and the slag discharge pipe is fixed with the rotary table, the check ring and the upper flange plate along the outline of the drill bit in the drill bit, so that the integral strength of the drill bit is enhanced, and the integral structure of the drill bit is compact and reasonable.
Drawings
Fig. 1 is the structure schematic diagram of the large rock breaking hob drill of the utility model.
Fig. 2 is the structure schematic diagram of the large-scale rock breaking hob bit of the utility model enlarged locally.
Fig. 3 is the structural schematic diagram of the large rock breaking hob drill head front view partial section.
Fig. 4 is the structural schematic diagram of the large rock breaking hob drill circular truncated cone hob partially cut open in the front view.
Fig. 5 is a schematic structural diagram of the connection between the large rock breaking hob and the drill rod of the utility model.
The device comprises a drill rod 1, a drill rod 2, a rotary disc 3, a guide cylinder 4, a first roller hob 5, a wheel carrier 6, a cone hob 7, a second roller hob 8, a coring barrel 9, a pressing plate 10, a retaining ring 11, a connecting rib plate 12, a lower flange plate 13, an upper flange plate 14 and a deslagging pipe.
Detailed Description
The invention will be further explained with reference to the drawings and the specific embodiments.
As shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, the utility model discloses large-scale broken rock hobbing cutter drill bit, it is including carousel 2 that is located drilling rod 1 below, and 2 lower surface middle parts of carousel are protruding to have a guide cylinder 3, and the difference in height of 3 end anchor rings of guide cylinder and 2 lower surfaces of carousel is 0.2m in this embodiment, and 3 end anchor rings of guide cylinder are equipped with a plurality of first hobbing cutter 4 of round, and specific theory, every first hobbing cutter 4 is installed on 3 lateral surfaces of guide cylinder through a connecting plate axial.
The lower surface of the rotary table 2 on the outer edge of the guide cylinder 3 forms a ring surface, a circle of a plurality of wheel frames 5 are welded on the ring surface of the rotary table 2, each wheel frame 5 is connected with a circular truncated cone hob 6 through a shaft, the cutting surface of the circular truncated cone hob 6 is a conical surface with a large upper part and a small lower part, and the shaft of each circular truncated cone hob 6 forms an acute angle with the vertical direction. It is also customary in the industry to refer to the frustum-shaped hob 6 as an annular cutting hob.
A circle of a plurality of second roller cutters 7 are arranged on the outermost edge of the lower surface of the rotary disc 2, namely the periphery of the circle of the circular truncated cone roller cutters 6, and specifically, each second roller cutter 7 is axially arranged on the side surface of the rotary disc 2 through a connecting plate.
The welding of 2 upper surface middle parts of carousel has coring bucket 8, and the height of coring bucket 8 in this embodiment is 3m, and 8 centre bores of coring bucket and 3 centre bores of a guide section of thick bamboo communicate and run through carousel 2, and the upper portion of coring bucket 8 internal surface is fixed with along spiral shell screwing in rise clamp plate 9, and clamp plate 9 thickness is from up increasing progressively down.
The drill bit further comprises a plurality of retaining rings 10 which are axially distributed at intervals, in the embodiment, the number of the retaining rings 10 is three, and the three retaining rings 10 are all positioned above the rotating disc 2; the fixed surface of carousel 2 has four connection rib plate 11 along axial extension, and four connection rib plate 11 along coring barrel 8 circumference evenly distributed, and the internal surface of three retaining ring 10 all is fixed with the outside of four connection rib plate 11, and coring barrel 8 surface also is fixed with the inboard of four connection rib plate 11. Here, the concept of uniform orientation is inward close to the coring barrel 8 and outward away from the coring barrel 8.
The parts of the four connecting rib plates 11, which exceed the uppermost retainer ring 10, are all trapezoids with small upper parts and large lower parts, an upper flange 13 is jointly fixed at the upper ends of the four connecting rib plates 11, namely the upper ends of the four trapezoids, and the upper flange 13 of the drill bit is fixedly butted with the lower flange 12 of the drill rod 1.
The drill bit also comprises a slag discharge pipe 14, wherein the slag discharge pipe 14 is formed by an upper vertical section, a middle inclined section and a lower vertical section in sequence, slag discharge channels of the upper vertical section, the middle inclined section and the lower vertical section are also communicated in sequence, the lower vertical section penetrates through the rotary table 2 and is welded with the rotary table 2, and the lower vertical section is welded with the inner surfaces of the middle and lower retainer rings 10; the middle inclined section is positioned at the upper retainer ring 10; the upper vertical section penetrates through the middle part of the upper flange 13 and is welded with the upper flange 13, and a slag discharge channel of the upper vertical section is communicated with a central hole of the drill rod 1.
Claims (6)
1. The utility model provides a large-scale broken rock hobbing cutter drill bit, it includes carousel (2) that are located drilling rod (1) below, its characterized in that: a guide cylinder (3) is arranged in the middle of the lower surface of the rotary disc (2) in a protruding mode, and a plurality of first roller cutters (4) are arranged on the bottom ring surface of the guide cylinder (3); the lower surface of a rotary table (2) on the outer edge of the guide cylinder (3) forms a ring surface, the ring surface of the rotary table (2) is provided with a plurality of wheel frames (5), each wheel frame (5) is connected with a circular truncated cone hob (6) through a shaft, and the shaft of each circular truncated cone hob (6) forms an acute angle with the vertical direction.
2. A large rock breaking roller cutter drill bit according to claim 1, characterized in that: and a plurality of second roller cutters (7) are arranged on the outermost edge of the lower surface of the rotary disc (2).
3. A large rock breaking roller cutter drill bit according to claim 1, characterized in that: the middle part of the upper surface of the rotary table (2) is provided with a coring barrel (8), the center hole of the coring barrel (8) is communicated with the center hole of the guide cylinder (3) and penetrates through the rotary table (2), the upper part of the inner surface of the coring barrel (8) is fixed with a pressing plate (9) which rises along a spiral, and the thickness of the pressing plate (9) is gradually increased from bottom to top.
4. A large rock breaking roller cutter drill bit according to claim 3, characterized in that: the rotary table further comprises a plurality of retaining rings (10) which are axially distributed at intervals, and all the retaining rings (10) are positioned above the rotary table (2); the upper surface of the rotary table (2) is provided with a plurality of connecting rib plates (11) extending along the axial direction, all the connecting rib plates (11) are uniformly distributed along the circumferential direction of the coring barrel (8), the inner surface of each retainer ring (10) is fixed with the outer side of each connecting rib plate (11), and the outer surface of the coring barrel (8) is also fixed with the inner side of each connecting rib plate (11).
5. A large rock breaking roller cutter drill bit according to claim 4, characterized in that: the part of each connecting rib plate (11) exceeding the uppermost retainer ring (10) is in a trapezoid shape with a small upper part and a large lower part, and an upper flange (13) which is used for being in butt joint with a lower flange (12) of the drill rod (1) is jointly fixed at the upper ends of all the connecting rib plates (11).
6. A large rock breaking roller cutter drill bit according to claim 5, characterized in that: the slag discharging pipe (14) is formed by sequentially communicating an upper vertical section, a middle inclined section and a lower vertical section, the lower vertical section penetrates through the rotary table (2) and is welded with the rotary table, the lower vertical section is welded with the inner surface of the retainer ring (10), the upper vertical section penetrates through the middle of the upper flange plate (13) and is welded with the upper flange plate and the lower vertical section, and a slag discharging channel of the upper vertical section is communicated with a central hole of the drill rod (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921059374.5U CN210178282U (en) | 2019-07-09 | 2019-07-09 | Large-scale rock-breaking hob drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921059374.5U CN210178282U (en) | 2019-07-09 | 2019-07-09 | Large-scale rock-breaking hob drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210178282U true CN210178282U (en) | 2020-03-24 |
Family
ID=69840386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921059374.5U Active CN210178282U (en) | 2019-07-09 | 2019-07-09 | Large-scale rock-breaking hob drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210178282U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112031664A (en) * | 2020-09-10 | 2020-12-04 | 中煤特殊凿井有限责任公司 | Combined hob and drill bit capable of annularly breaking rock |
| CN113153164A (en) * | 2021-04-20 | 2021-07-23 | 金沙县仁德钻探工具有限公司 | Four-wing flat-top eight-tooth drill bit |
-
2019
- 2019-07-09 CN CN201921059374.5U patent/CN210178282U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112031664A (en) * | 2020-09-10 | 2020-12-04 | 中煤特殊凿井有限责任公司 | Combined hob and drill bit capable of annularly breaking rock |
| CN113153164A (en) * | 2021-04-20 | 2021-07-23 | 金沙县仁德钻探工具有限公司 | Four-wing flat-top eight-tooth drill bit |
| CN113153164B (en) * | 2021-04-20 | 2024-02-23 | 金沙县仁德钻探工具有限公司 | Four-wing flat-top eight-tooth drill bit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210178282U (en) | Large-scale rock-breaking hob drill bit | |
| CN201738814U (en) | Inner spiral cylinder type combined rock drilling tool | |
| CN217106831U (en) | Full-section roller bit | |
| CN104481408A (en) | Pick cylindrical drill suitable for construction of super-large diameter swivel-driven piles and application method thereof | |
| CN207245622U (en) | A kind of cast-in-situ bored pile drill bit | |
| CN110080776B (en) | Fluid well-flushing deslagging system suitable for vertical shaft heading machine | |
| CN210977310U (en) | Drill barrel positioning device of rotary drilling rig for floating platform operation | |
| CN114909139A (en) | Cutter head device of shaft boring machine | |
| CN212201908U (en) | Double-section hobbing cutter drill bit for large-diameter piles | |
| CN210195668U (en) | Hole expanding drill bit for deep well hole forming | |
| CN111305756A (en) | Large-diameter reverse circulation drilling multi-slag suction port wing-shaped drill bit and using method thereof | |
| CN215520782U (en) | Novel rotary drilling primary-secondary drilling tool | |
| CN205243438U (en) | A drilling rod for anti -sticking bores | |
| CN205025361U (en) | Anti - rotary drilling machine's that circulates of major diameter four impeller tooth drill bits | |
| CN107420028B (en) | Percussion drill and percussion drill | |
| CN211342784U (en) | Drilling tool and rotary drilling rig | |
| CN211173974U (en) | Gas extraction drill rod joint and drilling tool with enhanced slag discharge function | |
| RU2386777C2 (en) | Tubular drill | |
| CN212359631U (en) | Core bit is got in concrete drilling bored concrete pile defective pile restoration processing | |
| CN210598891U (en) | Cylindrical drilling tool for removing obstacles in hole of drilled pile | |
| CN206503561U (en) | A kind of drill bit for geotechnical boring | |
| CN215860003U (en) | Anti-sticking well drill bit | |
| CN111550190A (en) | Core bit is got in concrete drilling bored concrete pile defective pile restoration processing | |
| CN218844229U (en) | Composite barrel drill for assembling and welding gear wheel and cutting tooth | |
| CN217106838U (en) | Assembled long-tooth wheel barrel drill |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 315800 Xingnong building, Ningbo Free Trade Zone, Zhejiang Province Patentee after: Zhejiang Yitong Special Foundation Engineering Co.,Ltd. Address before: 315800 Xingnong building, Ningbo Free Trade Zone, Zhejiang Province Patentee before: ZHEJIANG YITONG FOUNDATION ENGINEERING Co.,Ltd. |