CN210033286U - Two-petal bucket rotary drilling bit - Google Patents
Two-petal bucket rotary drilling bit Download PDFInfo
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- CN210033286U CN210033286U CN201920619081.1U CN201920619081U CN210033286U CN 210033286 U CN210033286 U CN 210033286U CN 201920619081 U CN201920619081 U CN 201920619081U CN 210033286 U CN210033286 U CN 210033286U
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Abstract
The utility model relates to a drill bit is dug soon to two lamella fill. This drill bit, including the square head, the square head lower extreme is provided with two lamella formula barrels through two connecting pin symmetries, and two lamella formula barrel lower extreme are fixed and are equipped with two lamella formula welding section of thick bamboos, and two lamella formula welding section of thick bamboos internal fixation are equipped with the cutting pinion rack, and cutting pinion rack front edge is equipped with the cutting tooth. The side of two lamella formula barrels is equipped with two circular wash ports, and when can make the dregs get into the drill bit inside, the inside mud of drill bit was discharged from the side wash port, reduces the resistance that the dregs got into to reduce the compaction effect of downthehole mud to the inside dregs of drill bit, thereby avoid dregs of soil and drill bit inner wall in close contact with, improve the clear sediment efficiency outside the hole. The utility model discloses can effectively improve the drilling of digging the drill bit soon and arrange sediment efficiency, prevent drill bit mud bag and hole bottom vacuum negative pressure phenomenon, through creep into fast and reduce the disturbance to the pore wall, reduce and dig the concrete filling coefficient who drills the bored concrete pile soon.
Description
Technical Field
The utility model relates to a drill bit especially relates to a drill bit is dug soon to two lamella fill.
Background
With the rapid development of national economy, China has huge market demands in the construction field of the industries such as traffic, electric power and municipal engineering, and the construction of environment-friendly pile foundation engineering by adopting a rotary drilling rig becomes an unprecedented construction technology. In the actual rotary drilling and pore forming process, the local soil filling layer, the sand layer, the gravel layer and the like are seriously expanded or collapsed, the pore-forming quality is low, the concrete filling coefficient is overlarge, and the engineering benefit is seriously influenced.
In order to reduce the concrete filling coefficient of the rotary drilling bored concrete pile, the slurry performance, the construction process and the rotary drilling bit can be adjusted and improved. In the aspect of rotary drilling of the drill bit, the drill bit is various, and common drill bit types comprise a sand scooping hopper, a two-petal hopper, a cylindrical drill, an auger bit and the like. When the type of the drill bit is not suitable for the drilled stratum, the drilling efficiency is low, the probability of scraping the hole wall by the drill bit is increased, and the phenomena of hole wall collapse and pile hole diameter expansion are caused. Because the annular flow area between the drill bit and the hole wall is too small, the drill bit is easy to form a piston effect in the drill lifting process, so that a vacuum negative pressure area is generated at the bottom of the hole, and the hole wall collapses. The phenomenon is particularly obvious when a stratum with high clay content is drilled, and the clay wrapped on the surface of the drill bit further reduces the annular flow area.
Disclosure of Invention
For solving the above problem, the utility model provides a dig bored concrete pile soon and creep into with two lamella fill dig the drill bit soon, adopt this drill bit can improve the construction speed who digs drilling soon to avoid carrying to bore the in-process and produce vacuum negative pressure zone bottom the drill bit.
The utility model adopts the technical proposal that: the utility model provides a drill bit is dug soon to two lamellas fill which characterized in that: the rotary drilling rig comprises a square head connected with the lower end of a drill rod of a rotary drilling rig, wherein two petal type cylinders are symmetrically arranged at the lower end of the square head through two connecting pins, the two petal type cylinders and the square head are linked together through the two connecting pins, the two petal type cylinders are closed under the normal condition, and the two petal type cylinders can be opened at a certain angle during slag removal. The lower end of the two-petal cylinder body is fixedly provided with two-petal welding cylinders, cutting toothed plates are fixedly arranged in the two-petal welding cylinders, and the front edges of the cutting toothed plates are provided with cutting teeth; and drain holes are formed in the two sides of the two-petal-type cylinder body. The mud inside the drill bit is discharged from the side surface drain hole, so that the resistance of entering the dregs is reduced, and the compaction effect of the mud in the hole on the dregs inside the drill bit is reduced, thereby avoiding the tight contact of the dregs and the inner wall of the drill bit and improving the dregs removing efficiency outside the hole. In the drilling process, mud in the drill bit can rapidly enter the annular space through the side surface water drainage holes and flow into the position below the drill bit, so that the possibility of vacuum negative pressure generated below the drill bit is reduced.
Preferably, two circular drain holes arranged along the height direction are formed in two sides of the two-petal-type cylinder body. The circular drain hole can increase the effective flow area of fluid inside the drill bit to the maximum extent.
Furthermore, the diameter of the upper drain hole is slightly smaller than that of the lower drain hole, and the distance between the two drain holes is larger than the maximum drain hole diameter. Thereby reducing the influence of the processing round hole on the strength of the cylinder body.
Preferably, a supporting plate is arranged between the two petal type welding cylinders and the cutting toothed plate. The connecting strength of the cutting toothed plate and the welding cylinder can be increased, and the resistance when the muck enters the drill bit is reduced.
Further, the supporting plate is positioned at the outer side of the cutting toothed plate.
Preferably, the cutting teeth are provided with spherical hard alloy bulges. The raised feature reduces the contact area between the cutter and the rock and soil, providing space for bottom-hole mud to invade between the cutter and the rock and soil, thereby preventing bit balling.
Preferably, the cutting teeth are staggered on the two cutting tooth plates, so that the drilling efficiency of the drill bit is improved.
Preferably, the position where the cutting toothed plate is connected with the welding cylinder is provided with an arc-shaped water gap. On the one hand, the arc-shaped nozzle can avoid the concentrated stress of the welding cylinder in the working process, and on the other hand, the arc-shaped nozzle can also increase the effective flow area of slurry in the drill bit discharged from the nozzle when the slag enters the drill bit.
Preferably, the upper part of the two-petal-type cylinder body is provided with an upper gauge for protecting the cylinder body from being abraded.
Preferably, the outer side of the two-petal welding cylinder is provided with a lower gauge, and the height of the two-petal welding cylinder is larger than that of the welding cylinder, so that the connection strength between the welding cylinder and the cylinder body is increased while the gauge is maintained.
The utility model discloses the beneficial effect who gains is: the side of two lamella formula barrels is equipped with two circular wash ports, and when can make the dregs get into the drill bit inside, the inside mud of drill bit was discharged from the side wash port, reduces the resistance that the dregs got into to reduce the compaction effect of downthehole mud to the inside dregs of drill bit, thereby avoid dregs of soil and drill bit inner wall in close contact with, improve the clear sediment efficiency outside the hole. In the drilling process, mud in the drill bit can rapidly enter the annular space through the side surface water drainage holes and flow into the position below the drill bit, so that the possibility of vacuum negative pressure generated below the drill bit is reduced. The utility model discloses can effectively improve the drilling of digging the drill bit soon and arrange sediment efficiency, prevent drill bit mud bag and hole bottom vacuum negative pressure phenomenon, through creep into fast and reduce the disturbance to the pore wall, reduce and dig the concrete filling coefficient who drills the bored concrete pile soon.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a front view of FIG. 1;
FIG. 3 is a bottom view of FIG. 1;
reference numerals: 1. a square head; 2. a two-petal cylinder; 3. a two-lobe welding cylinder; 4. a connecting pin; 5. cutting a toothed plate; 6. cutting teeth; 7. a support plate; 8. keeping the diameter; 9. keeping the diameter; 10. an arc-shaped water gap; 11. and (4) draining the water.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-3, the utility model discloses a drill bit is dug soon to two lamella fill, including square 1, two lamella formula barrels 2, two lamella formula welding section of thick bamboos 3, connect and connect round pin 4, cutting pinion rack 5 and cutting teeth 6, square 1 is used for will digging the drill bit soon and dig the drilling rod of rig soon and connect, and connecting pin 4 is used for connecting square 1 and two lamella formula barrels 2, owing to originally dig the drill bit soon and be two lamella formulas, has adopted 2 connecting pins 4, corresponds with two lamella barrels respectively, and two lamella formula barrels 2 can be followed connecting pin 4 and rotated to the realization is opened and is foldd. The lower extreme welding of two lamella formula barrels 2 has two lamella formula welding section of thick bamboo 3 that thickness is bigger, and the both sides of two lamella formula barrels 2 respectively design have two circular wash ports 11, and the diameter ratio of upper portion wash port 11 lower part wash port 11 diameter is slightly littleer, and the distance between two round holes should be greater than the diameter of biggest round hole to reduce the influence of processing round hole to stack shell intensity.
The design of the circular drain hole 11 can enable the mud inside the drill bit to be discharged from the drain hole on the side surface when the muck enters the drill bit, so that the resistance of the muck entering is reduced, and the compaction effect of the mud in the hole on the muck inside the drill bit is reduced, so that the muck is prevented from being in close contact with the inner wall of the drill bit, and the slag removal efficiency outside the hole is improved. In the drilling process, mud in the drill bit can rapidly enter the annular space through the side water discharge holes 11 and flow into the position below the drill bit, so that the possibility of vacuum negative pressure generated below the drill bit is reduced. The circular drain hole can increase the effective flow area of fluid inside the drill bit to the maximum extent.
The detachable cutting teeth 6 are designed with spherical hard alloy protrusions, the contact area between the cutting teeth and rock soil can be reduced due to the protruding characteristics, and a space is provided for bottom mud to invade between the cutting teeth and the rock soil, so that a drill bit mud bag is prevented.
The arc water gap 10 is designed at the position where the front of the cutting toothed plate 5 is connected with the two-petal type welding cylinder 3. On one hand, the arc-shaped water gap 10 can avoid the concentrated stress of the welding cylinder in the working process, and on the other hand, the arc-shaped water gap can also increase the effective flow area of slurry in the drill bit discharged from the water gap when the slag enters the drill bit.
The upper part of the two-petal cylinder 2 is provided with an upper gauge 8 for protecting the cylinder from being abraded. The outer side of the two-petal welding cylinder 3 is provided with a lower gauge 9, and the height of the lower gauge is larger than that of the welding cylinder, so that the gauge is protected, and meanwhile, the connection strength between the welding cylinder and the cylinder body is increased.
The foregoing shows and describes the general principles and principal structural features of the invention. The present invention is not limited by the above-mentioned examples, and the present invention can be modified in various ways without departing from the spirit and scope of the present invention, and these modifications and improvements fall within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides a drill bit is dug soon to two lamellas fill which characterized in that: the drilling machine drilling rod cutting device comprises a square head (1) connected with the lower end of a drilling rod of a rotary drilling rig, wherein two petal type cylinders (2) are symmetrically arranged at the lower end of the square head (1) through two connecting pins (4), two petal type welding cylinders (3) are fixedly arranged at the lower ends of the two petal type cylinders (2), a cutting toothed plate (5) is fixedly arranged in the two petal type welding cylinders (3), and cutting teeth (6) are arranged at the front edge of the cutting toothed plate (5); and drain holes (11) are formed in the two sides of the two-petal-type cylinder body (2).
2. The two-bucket rotary drilling bit according to claim 1, wherein: two circular drain holes (11) arranged along the height direction are formed in the two sides of the two-petal-type cylinder body (2).
3. The two-bucket rotary drilling bit according to claim 2, wherein: the diameter of the upper drainage hole (11) is slightly smaller than that of the lower drainage hole (11), and the distance between the two drainage holes (11) is larger than the diameter of the maximum drainage hole (11).
4. The two-bucket rotary drilling bit according to claim 1, wherein: a supporting plate (7) is arranged between the two-petal welding cylinder (3) and the cutting toothed plate (5).
5. The two-bucket rotary drilling bit according to claim 4, wherein: the supporting plate (7) is positioned on the outer side of the cutting toothed plate (5).
6. The two-bucket rotary drilling bit according to claim 1, wherein: spherical hard alloy protrusions are arranged on the cutting teeth (6).
7. The two-bucket rotary drilling bit according to claim 1, wherein: the cutting teeth (6) are arranged on the two cutting toothed plates (5) in a staggered mode.
8. The two-bucket rotary drilling bit according to claim 1, wherein: and an arc-shaped water gap (10) is designed at the position where the cutting toothed plate (5) is connected with the two-petal welding cylinder (3).
9. The two-bucket rotary drilling bit according to claim 1, wherein: the upper part of the two-petal cylinder body (2) is provided with an upper gauge (8).
10. The two-bucket rotary drilling bit according to claim 1, wherein: the outer side of the two-petal welding cylinder (3) is provided with a lower gauge (9), and the height of the lower gauge (9) is larger than that of the two-petal welding cylinder (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920619081.1U CN210033286U (en) | 2019-04-30 | 2019-04-30 | Two-petal bucket rotary drilling bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920619081.1U CN210033286U (en) | 2019-04-30 | 2019-04-30 | Two-petal bucket rotary drilling bit |
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| Publication Number | Publication Date |
|---|---|
| CN210033286U true CN210033286U (en) | 2020-02-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920619081.1U Active CN210033286U (en) | 2019-04-30 | 2019-04-30 | Two-petal bucket rotary drilling bit |
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| CN (1) | CN210033286U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111395968A (en) * | 2020-04-30 | 2020-07-10 | 长沙市金钻机械有限公司 | Split type two-bucket rotary drilling bit |
| CN112267839A (en) * | 2020-11-13 | 2021-01-26 | 中铁四局集团建筑工程有限公司 | Drill bit for rotary drilling rig |
| CN113323577A (en) * | 2021-06-02 | 2021-08-31 | 成都四海岩土工程有限公司 | Rotary drilling square pile drilling tool |
-
2019
- 2019-04-30 CN CN201920619081.1U patent/CN210033286U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111395968A (en) * | 2020-04-30 | 2020-07-10 | 长沙市金钻机械有限公司 | Split type two-bucket rotary drilling bit |
| CN111395968B (en) * | 2020-04-30 | 2021-07-27 | 长沙市金钻机械有限公司 | Split type two-bucket rotary drilling bit |
| CN112267839A (en) * | 2020-11-13 | 2021-01-26 | 中铁四局集团建筑工程有限公司 | Drill bit for rotary drilling rig |
| WO2022100029A1 (en) * | 2020-11-13 | 2022-05-19 | 中铁四局集团建筑工程有限公司 | Drill bit for rotary drilling rig |
| CN113323577A (en) * | 2021-06-02 | 2021-08-31 | 成都四海岩土工程有限公司 | Rotary drilling square pile drilling tool |
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