CN216381220U - Novel bottom expanding drill bit - Google Patents
Novel bottom expanding drill bit Download PDFInfo
- Publication number
- CN216381220U CN216381220U CN202123106307.4U CN202123106307U CN216381220U CN 216381220 U CN216381220 U CN 216381220U CN 202123106307 U CN202123106307 U CN 202123106307U CN 216381220 U CN216381220 U CN 216381220U
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- China
- Prior art keywords
- drill bit
- expanding
- bottom expanding
- inlet pipe
- oil
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 17
- 239000007788 liquid Substances 0.000 claims abstract description 3
- 239000002002 slurry Substances 0.000 claims description 14
- 230000036346 tooth eruption Effects 0.000 claims description 4
- 239000003921 oil Substances 0.000 description 23
- 239000010720 hydraulic oil Substances 0.000 description 4
- 239000002689 soil Substances 0.000 description 3
- 238000005553 drilling Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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- Earth Drilling (AREA)
Abstract
The utility model relates to a novel bottom expanding drill bit capable of stably controlling the opening of a bottom expanding cutting rod. This kind of novel expand end drill bit is including boring the body and expanding end and cutting the pole, expands end and cuts the pole and articulate on boring the body, bores the internal hydro-cylinder that is equipped with, bores the upper portion of the body and is connected with into the thick liquid pipe and advance oil pipe and go out oil pipe that link to each other with the hydro-cylinder, expands end and cuts the one end card of pole and establish its characterized in that in the draw-in groove of hydro-cylinder piston: the drill body is internally provided with a displacement sensor used for sensing the moving stroke of the oil cylinder piston, the displacement head of the displacement sensor is connected to a connecting rod, and the connecting rod is connected to the bottom of the piston. The novel bottom expanding drill bit is provided with the displacement sensor, so that the bottom expanding and cutting rod is accurately controlled to act, and the accuracy and the stability of piling and bottom expanding are ensured.
Description
Technical Field
The utility model relates to the field of engineering machinery, in particular to a drill bit.
Background
Piling is an important part of the construction process. According to the design requirement, the pile must have certain bearing capacity and pulling resistance, and in order to meet the requirement, the existing drilling adopts a bottom-expanding drill bit. The bottom expanding drill bit is provided with a bottom expanding and cutting rod, the bottom expanding drill bit can be used for expanding the bottom of the cylindrical hole outside the cylindrical hole, and as shown in figure 4, the bottom of the pile body can form an expanded bottom after cement slurry is poured into the pile body, so that the bearing capacity and the pulling resistance of the pile body can be obviously improved. The existing bottom expanding and cutting rod is pushed by an oil cylinder to rotate, and has certain requirements on the rotating angle of the bottom expanding and cutting rod, which cannot be too large or too small. At present, the oil cylinders control the telescopic stroke of the oil cylinder according to the hydraulic oil pressure or the hydraulic oil flow, so as to control the rotating angle of the bottom expanding and cutting rod, however, the oil path of the hydraulic oil may be blocked or leaked, so that whether the bottom expanding and cutting rod is opened or not cannot be known, and if the bottom expanding and cutting rod is not opened, the pile body cannot meet the design requirement.
Disclosure of Invention
In view of the defects in the prior art, the utility model innovatively provides a novel bottom expanding drill bit capable of stably controlling the opening of a bottom expanding cutting rod.
This kind of novel expand end drill bit is including boring the body and expanding end and cutting the pole, expand end and cut the pole and articulate on boring the body, bore internal hydro-cylinder that is equipped with, the upper portion of boring the body is connected with into thick liquid pipe and the oil pipe and play oil pipe that advance that link to each other with the hydro-cylinder, expand end and cut the one end card of pole and establish its characterized in that in the draw-in groove of hydro-cylinder piston: the drill body is internally provided with a displacement sensor used for sensing the moving stroke of the oil cylinder piston, the displacement head of the displacement sensor is connected to a connecting rod, and the connecting rod is connected to the bottom of the piston.
The upper portion of the drill body is connected with an air inlet pipe, the side wall of the lower portion of the drill body is connected with an air outlet one-way valve, and the air outlet one-way valve is communicated with the air inlet pipe.
The slurry inlet pipe, the oil outlet pipe and the air inlet pipe are all independent.
The bottom expanding and cutting rod is provided with cutting teeth.
According to the novel bottom expanding drill provided by the utility model, the movement of the bottom expanding cutting rod is accurately controlled by arranging the displacement sensor, so that the accuracy and the stability of piling and bottom expanding are ensured.
Drawings
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a top view of the present invention;
FIG. 3 is a cross-sectional view of the present invention;
FIG. 4 is a schematic view of a borehole under-reamed.
Detailed Description
As shown in fig. 1, the novel bottom expanding drill bit comprises a drill body 1 and a bottom expanding and cutting rod 2, wherein the bottom expanding and cutting rod 2 is hinged on the drill body 1, as shown in fig. 3, an oil cylinder 3 is arranged in the drill body 1, the upper part of the drill body 1 is connected with a slurry inlet pipe 10, an oil inlet pipe 11 and an oil outlet pipe 12 which are connected with the oil cylinder 3, the slurry inlet pipe 10 is used for feeding slurry, the oil inlet pipe 11 and the oil outlet pipe 12 are used for feeding oil and discharging oil to the oil cylinder 3, in order to drive the bottom expanding and cutting rod 2 to rotate, one end of the bottom expanding and cutting rod 2 is clamped in a clamping groove of an oil cylinder piston 30, the oil cylinder piston 30 is pushed to move by hydraulic oil, the bottom expanding and cutting rod 2 rotates, and soil cutting and bottom expanding are realized when the bottom expanding and cutting rod 2 is opened by a certain angle and rotates along with the drill body 1. In order to control the opening angle of the bottom expanding and cutting rod 2, the utility model is provided with a displacement sensor used for sensing the moving stroke of a cylinder piston 30 in the drill body 1, the displacement head 5 of the displacement sensor is connected to a connecting rod 4, and the connecting rod 4 is connected to the bottom of the piston 30. The piston 30 moves to drive the displacement head 5 of the displacement sensor to move, and the displacement sensor can sense the moving distance of the piston 30, so that the piston 30 is controlled (the control principle is the prior art), and the opening of the bottom expanding and cutting rod 2 can be accurately and stably controlled because the stroke amount of the piston 30 moving and the opening angle amount of the bottom expanding and cutting rod 2 are in a linear relation.
The drill bit can generate high temperature when drilling soil, the drill bit can be influenced by long duration of the high temperature, in order to cool the drill bit, the upper part of the drill body is connected with an air inlet pipe 13, the side wall of the lower part of the drill body 1 is connected with an air outlet one-way valve 6 (the air outlet one-way valve 6 realizes one-way air outlet and prevents external substances from entering the drill body 1), and the air outlet one-way valve 6 is communicated with the air inlet pipe 13. After the air inlet pipe 13 is ventilated, the air flows out through the air outlet one-way valve 6, so that the drill bit is cooled; in addition, the ventilation can float earth on the ground surface, thereby accelerating the cutting speed.
The oil inlet pipe and the oil outlet pipe of the existing bottom expanding drill bit are arranged in the slurry inlet pipe, and slurry easily enters the oil inlet pipe and the oil outlet pipe when the drill bit needs to be replaced. In order to solve the problem, as shown in fig. 2, the slurry inlet pipe 10, the slurry inlet pipe 11, the slurry outlet pipe 12 and the gas inlet pipe 13 of the present invention are independent from each other, that is, the pipes do not overlap each other in the radial direction, so that it is ensured that the slurry does not enter the slurry inlet pipe 11, the slurry outlet pipe 12 or the gas inlet pipe 13.
Finally, it is worth mentioning that the utility model provides the bottom-reaming rod 2 with cutting teeth 20. The cutting teeth 20 can improve the soil cutting ability of the bottom-expanding cutting bar 2.
Claims (4)
1. The utility model provides a novel expand end drill bit, is including boring body (1) and expanding end and cut pole (2), expand end and cut pole (2) and articulate on boring body (1), be equipped with hydro-cylinder (3) in boring body (1), the upper portion of boring body (1) is connected with into thick liquid pipe (10) and advance oil pipe (11) and go out oil pipe (12) that link to each other with hydro-cylinder (3), the one end card of expanding end and cutting pole (2) is established in the draw-in groove of hydro-cylinder piston (30), its characterized in that: the drill bit is characterized in that a displacement sensor used for sensing the moving stroke of the oil cylinder piston (30) is arranged in the drill body (1), a displacement head (5) of the displacement sensor is connected to a connecting rod (4), and the connecting rod (4) is connected to the bottom of the piston (30).
2. The novel under-reamer of claim 1, wherein: the air inlet pipe (13) is connected to the upper portion of the drill body (1), an air outlet one-way valve (6) is connected to the side wall of the lower portion of the drill body (1), and the air outlet one-way valve (6) is communicated with the air inlet pipe (13).
3. The novel under-reamer of claim 2, wherein: the slurry inlet pipe (10), the oil inlet pipe (11), the oil outlet pipe (12) and the air inlet pipe (13) are mutually independent.
4. The novel under-reamer of claim 1, wherein: the bottom expanding and cutting rod (2) is provided with cutting teeth (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123106307.4U CN216381220U (en) | 2021-12-13 | 2021-12-13 | Novel bottom expanding drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123106307.4U CN216381220U (en) | 2021-12-13 | 2021-12-13 | Novel bottom expanding drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216381220U true CN216381220U (en) | 2022-04-26 |
Family
ID=81224080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123106307.4U Active CN216381220U (en) | 2021-12-13 | 2021-12-13 | Novel bottom expanding drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216381220U (en) |
-
2021
- 2021-12-13 CN CN202123106307.4U patent/CN216381220U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A New Type of Bottom Expanding Drill Bit Effective date of registration: 20230516 Granted publication date: 20220426 Pledgee: Zhejiang Ruian rural commercial bank Limited by Share Ltd. Anyang branch Pledgor: WENZHOU ZHENZHONG FOUNDATION ENGINEERING MACHINERY TECHNOLOGY Co.,Ltd. Registration number: Y2023980040684 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Granted publication date: 20220426 Pledgee: Zhejiang Ruian rural commercial bank Limited by Share Ltd. Anyang branch Pledgor: WENZHOU ZHENZHONG FOUNDATION ENGINEERING MACHINERY TECHNOLOGY Co.,Ltd. Registration number: Y2023980040684 |