CN218206586U - Rotary drilling bit and rotary drilling machine for saturated soft loess stratum - Google Patents
Rotary drilling bit and rotary drilling machine for saturated soft loess stratum Download PDFInfo
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- CN218206586U CN218206586U CN202222504872.4U CN202222504872U CN218206586U CN 218206586 U CN218206586 U CN 218206586U CN 202222504872 U CN202222504872 U CN 202222504872U CN 218206586 U CN218206586 U CN 218206586U
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Abstract
The application relates to the technical field of building construction equipment, in particular to a rotary drilling bit and a rotary excavator for a saturated soft loess stratum, which comprise a drilling barrel and at least one side cutter; the side cutter is arranged close to the drilling end of the drilling barrel, the distance between the side cutter and the outer peripheral side of the drilling barrel is gradually increased from one side close to the mounting end of the drilling barrel to one side far away from the mounting end of the drilling barrel, the included angle degree between the plane where the side cutter is located and the end face of the drilling end of the drilling barrel is 60-65 degrees, and the side cutter is connected with the outer side wall of the drilling barrel. The soft loess stratum of saturation that relates to in this application digs the drill bit soon, through the limit sword, thereby realize scraping the effect of pore wall increase aperture, when digging the stake foundation hole in the same aperture soon in the soft loess stratum of saturation, the barrel diameter of boring a section of thick bamboo can be littleer to the clearance between increase bore a section of thick bamboo lateral wall and the pore wall reduces the probability that the mud flow is full of the clearance between bore a section of thick bamboo lateral wall and the pore wall, is carrying the difficult "piston" effect that forms of boring the in-process, reduces the hole probability of collapsing.
Description
Technical Field
The utility model relates to a construction equipment technical field especially relates to a drill bit is dug soon in soft loess stratum of saturation and digs machine soon.
Background
The saturated soft loess is formed after the collapsible loess is soaked by water, although the collapsible property of the soil is degraded, the macropores of the soil are still basically completely preserved, the structure of the soil is not completely destroyed by soaking, under the action of newly increased load, larger compression deformation can be generated, the engineering performance of the soil is poorer, the water content is high, the soil is often in a soft plastic or flow plastic state, and the bearing capacity is very low.
In the rotary drilling, under the condition of slurry wall protection, a rotary table or a power head on a rotary drilling rig drives a telescopic drill rod and a straight-barrel-shaped drill bit at the bottom of the drill rod to rotate, cutting tools on openings at the bottom end and the side surface of a drilling bucket are used for cutting loess, and meanwhile, the cut loess enters the drilling bucket from the opening. After the drilling bucket is filled with drill cuttings, the drill bit is lifted to the hole opening through the telescopic drill rod, the bottom is automatically opened, soil is unloaded, and then the drilling bucket is lowered to the bottom of the hole to continuously drill.
Aiming at the related technologies, the inventor thinks that when the hole is formed in the saturated soft yellow soil layer by rotary drilling, the saturated soft yellow soil is in a soft plastic shape, and the local part of the saturated soft yellow soil is in a flow plastic shape, so that the rotary drilling rig can be filled with flow mud between the outer wall of the straight-barrel-type drill bit and the hole wall in the hole forming process, a piston effect is easily formed in the drill lifting process, and the hole wall collapse is easy to occur.
SUMMERY OF THE UTILITY MODEL
In order to reduce the hole collapse probability in the drilling process, the rotary drilling bit and the rotary drilling machine for the saturated soft loess stratum are provided.
The first aspect, this application provides a drill bit is dug soon in soft loess stratum of saturation, and it adopts following technical scheme:
a rotary drilling bit for a saturated soft loess stratum comprises a drilling barrel and at least one side cutter; the edge cutter is arranged close to the drilling end of the drilling barrel, the distance between the edge cutter and the outer peripheral side of the drilling barrel is gradually increased from one side close to the mounting end of the drilling barrel to one side close to the drilling end of the drilling barrel, the included angle degree between the plane where the edge cutter is located and the horizontal end face of the drilling end of the drilling barrel is 60-65 degrees, and the edge cutter is connected with the outer side wall of the drilling barrel.
By adopting the technical scheme, during drilling, the mounting end of the drill cylinder is connected with the drill rod of the rotary drilling machine, the drill rod is guided by the mast to be lowered and the drill bit is placed in a hole position, the power device and the pressurizing device of the rotary drilling machine are started to enable the drill bit to drill downwards, the drill cylinder drives the side cutter to scrape the hole wall while rotating, the drill bit utilizes the drill teeth to feed loess into the drill cylinder while crushing the loess downwards, then the drill bit is lifted out of the hole by the lifting device of the rotary drilling machine and the telescopic drill rod to unload the soil, and the circulation is carried out until the drill reaches the designed depth; the drill bit is dug soon to soft loess stratum of saturation of design, through the limit sword that leans out, thereby realize scraping the effect of pore wall increase aperture, when digging the stake foundation hole in the same aperture soon in the soft loess stratum of saturation, the barrel diameter of boring a section of thick bamboo can be littleer to the clearance between increase boring a section of thick bamboo lateral wall and the pore wall reduces the probability that the mud flow is full of the clearance between boring a section of thick bamboo lateral wall and the pore wall, thereby is improving the difficult "piston" effect that forms of boring the in-process, reduces the hole probability of collapsing.
Optionally, the length of the side knife is greater than 30cm and less than 50cm.
By adopting the technical scheme, the designed edge cutter with the length of 30cm to 50cm can prolong the service life of the edge cutter while ensuring certain drilling efficiency and reducing the piston effect.
Optionally, when the drill cylinder is vertically arranged, the lowest point of the edge cutter is located below the drilling end of the drill cylinder.
Through adopting above-mentioned technical scheme, the limit sword of design when scraping the pore wall, can reduce the edge and the loess contact of drill pipe drilling end to reduce the degree of wear of loess to the drill pipe's the edge of boring the end.
Optionally, the lower end of the side cutter is inclined towards the direction opposite to the rotation direction of the drill barrel.
Through adopting above-mentioned technical scheme, the limit sword of design is when scraping the pore wall, is convenient for utilize limit sword inclined plane propelling movement to a drill section of thick bamboo bottom with loess and the mud piece that scrapes down.
Optionally, the thickness of the edge knife decreases progressively along the rotation direction of the edge knife, and a material guiding inclined plane is formed on the inner side wall of the edge knife.
Through adopting above-mentioned technical scheme, the limit sword of design is when scraping the pore wall, is convenient for with scraping loess and the mud piece that get off and the guide inclined plane propelling movement that the inside wall formed of limit sword to bore a section of thick bamboo bottom.
Optionally, when the drilling cylinder is vertically arranged, the vertical section of the drilling cylinder passing through the axis of the drilling cylinder is in an isosceles trapezoid shape, and the number of lower base angles of the isosceles trapezoid is 75-80 degrees.
By adopting the technical scheme, the designed drilling barrel adopts a cone barrel structure, the lower bottom angle number of the vertical section passing through the axis of the drilling barrel is 75-80 degrees, and the service life of the drilling barrel can be prolonged while certain drilling efficiency is ensured and soil unloading is facilitated.
Optionally, the outer side wall of the drill cylinder is provided with a plurality of thread-shaped protective convex ribs.
Through adopting above-mentioned technical scheme, the protection bead of design through the contact that reduces lateral wall and loess to reduce the degree of wear of the lateral wall of boring a section of thick bamboo, increase of service life.
In a second aspect, the application provides a rotary excavating machine, which comprises a rotary excavating drill bit for a saturated soft loess stratum, wherein the rotary excavating drill bit for the saturated soft loess stratum is installed on a drill rod of the rotary excavating machine.
Through adopting above-mentioned technical scheme, use the soft loess stratum of saturation to dig soon the machine of digging of drill bit, when drilling in the soft loess stratum of saturation, can increase and bore the clearance between section of thick bamboo lateral wall and the pore wall, reduce the probability that the clearance between section of thick bamboo lateral wall and the pore wall is full of to the mud that flows to difficult formation "piston" effect is being carried boring the in-process, the reduction probability of collapsing the hole.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the designed rotary drilling bit for the saturated soft loess stratum realizes the effect of scraping the hole wall to increase the hole diameter through the edge cutters which incline outwards, the barrel diameter of the drilling barrel can be smaller when pile foundation holes with the same hole diameter are rotary drilled, so that the gap between the outer side wall of the drilling barrel and the hole wall is increased, and the possibility that the gap between the outer side wall of the drilling barrel and the hole wall is filled with mud can be reduced when holes are drilled in the saturated soft loess stratum, so that the piston effect is not easy to form in the drilling lifting process, and the hole collapse probability is reduced;
2. the designed rotary drilling bit for the saturated soft loess stratum adopts the drilling barrel with a cone barrel structure, and is convenient for lifting the drilling bit and unloading soil while expanding the gap between the outer side wall of the drilling barrel and the hole wall through the matching of the drilling barrel and the side cutter;
3. the drill bit is dug soon in the soft loess stratum of saturation of design, reduces the contact of lateral wall and loess through the protection bead to reduce the degree of wear of the lateral wall of boring a section of thick bamboo, increase of service life.
Drawings
Fig. 1 is a schematic view of the overall structure of a rotary drilling bit for a saturated soft loess formation according to embodiment 1 of the present application.
Fig. 2 is a front view of a saturated soft loess formation rotary drilling bit in which a drill barrel is vertically arranged in embodiment 1 of the present application.
Fig. 3 is a schematic view of the overall structure of the edge knife.
Fig. 4 is a front view of a saturated soft loess formation rotary drilling bit in which a drill barrel is vertically arranged in embodiment 2 of the present application.
Description of reference numerals: 1. drilling a barrel; 2. an edge cutter; 3. and (4) protecting the convex ribs.
Detailed Description
The present application is described in further detail below with reference to figures 1-4.
The embodiment of the application discloses drill bit and machine of digging soon are dug to soft loess stratum of saturation.
First aspect, the application discloses a drill bit is dug soon in soft loess stratum of saturation.
Example 1
Referring to fig. 1 and 2, the rotary drilling bit for the saturated soft loess formation comprises a drilling barrel 1 and a side cutter 2; bore section of thick bamboo 1 and be awl cylindric, when boring 1 vertical setting, it is isosceles trapezoid to bore 1 vertical cross sectional shape of passing self axis, and the number of degrees of isosceles trapezoid's lower base angle is located 75 degrees to 80 degrees between, prefers 75 degrees in this embodiment 1.
Referring to fig. 1 and 2, in this embodiment, 4 edge cutters 2 are provided, and 4 edge cutters 2 are uniformly distributed on the outer peripheral side of a drill barrel 1 along the circumferential direction of the drill barrel 1, the distance between the edge cutters 2 and the outer peripheral side of the drill barrel 1 gradually increases from the side close to the mounting end to the side close to the drilling end of the drill barrel 1, the included angle degree between the plane where the edge cutters 2 are located and the horizontal end face of the drilling end of the drill barrel 1 is between 60 degrees and 65 degrees, preferably 65 degrees in this embodiment 1, the lower ends of the edge cutters 2 are obliquely arranged in the opposite direction of the rotation direction of the drill barrel 1, the edge cutters 2 are welded on the drill barrel 1, and the gap between the edge cutters 2 and the drill barrel 1 is filled with a welding material.
Referring to fig. 2 and 3, the length of the edge cutter 2 is 35cm, and when the drill barrel 1 is vertically arranged, the lowest point of the edge cutter 2 is positioned below the drilling end of the drill barrel 1; the thickness of the edge cutter 2 decreases progressively along the rotation direction of the edge cutter, and a material guide inclined surface is formed on the inner side wall of the edge cutter 2.
The implementation principle of the embodiment 1 is as follows: when drilling, the mounting end of the drill cylinder 1 is connected with a drill rod of a rotary excavator, the drill rod is lowered under the guidance of a mast, the drill bit is placed to a hole site, a power device and a pressure device of the rotary excavator are started, the drill bit drills downwards, the drill cylinder 1 rotates in, meanwhile, the side cutters 2 are driven to scrape the hole wall, the hole diameter of a pile foundation hole is enlarged, meanwhile, the side cutters 2 which are obliquely arranged are convenient to push scraped loess and mud blocks to the bottom of the drill cylinder 1, then, the loess is sent into the drill cylinder 1 by using the drill teeth at the bottom of the drill cylinder 1, when the drill bit drills to a certain depth, the drill bit is lifted out of the hole by a lifting device of the rotary excavator and a telescopic drill rod to unload the soil, and the circulation is carried out until the drill bit drills to the designed depth; in this embodiment 1, the side cutter 2 is obliquely arranged, and the length of the side cutter 2 is increased, so that the effect of scraping the hole wall and increasing the hole diameter by the side cutter 2 is improved, when pile foundation holes with the same hole diameter are dug in a saturated soft-yellow land layer, the tube diameter of the drill tube 1 can be smaller, the gap between the outer peripheral side of the drill tube 1 and the hole wall is increased, the possibility that the gap between the outer side wall of the drill tube 1 and the hole wall is filled with flowing mud is reduced, the piston effect is not easily formed in the drilling process, and the hole collapse probability is reduced.
Example 2
Referring to fig. 4, the present embodiment 2 is different from embodiment 1 in that: the drill cylinder 1 is in a straight cylinder shape, 2 thread-shaped protective convex ridges 3 are arranged on the outer side wall of the drill cylinder 1, and the protective convex ridges 3 and the drill cylinder 1 are integrally formed.
The implementation principle of the embodiment 2 is as follows: when drilling, the mounting end of the drill cylinder 1 is connected with a drill rod of a rotary excavator, the drill rod is lowered under the guidance of a mast, the drill bit is placed to a hole site, a power device and a pressure device of the rotary excavator are started, the drill bit drills downwards, the drill cylinder 1 rotates in, meanwhile, the side cutters 2 are driven to scrape the hole wall, the hole diameter of a pile foundation hole is enlarged, meanwhile, the side cutters 2 which are obliquely arranged are convenient to push scraped loess and mud blocks to the bottom of the drill cylinder 1, then, the loess is sent into the drill cylinder 1 by using the drill teeth at the bottom of the drill cylinder 1, when the drill bit drills to a certain depth, the drill bit is lifted out of the hole by a lifting device of the rotary excavator and a telescopic drill rod to unload the soil, and the circulation is carried out until the drill bit drills to the designed depth; in this embodiment 2 with 2 slopes of limit sword settings, and increase 2 lengths of limit sword, thereby promote the effect of 2 scraping pore walls and increase aperture of limit sword, when digging the pile foundation hole of the same aperture soon in the soft loess stratum of saturation, can make the barrel diameter of boring a section of thick bamboo 1 littleer, thereby increase the clearance between 1 periphery side of boring a section of thick bamboo and the pore wall, reduce the possibility that the clearance between 1 lateral wall of boring a section of thick bamboo and the pore wall is filled up to the mud flow, thereby at the difficult formation "piston" effect of boring the promotion in-process, reduce the hole probability of collapsing, set up protection bead 3 on the periphery side of boring a section of thick bamboo 1 simultaneously, reduce the contact of 1 lateral wall of boring a section of thick bamboo and loess, thereby reduce the degree of wear of 1 lateral wall of boring a section of thick bamboo, and prolong service life.
In a second aspect, the application discloses a rotary drilling machine, which comprises the rotary drilling bit for the saturated soft loess formation described in embodiment 1 or embodiment 2.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The utility model provides a drill bit is dug soon in soft loess stratum of saturation which characterized in that: comprises a drill barrel (1) and at least one side cutter (2);
the edge cutter (2) is close to the drilling end of the drilling barrel (1) is arranged, the distance between the edge cutter (2) and the outer peripheral side of the drilling barrel (1) is gradually increased from the position close to the mounting end of the drilling barrel (1) to the position close to the drilling end of the drilling barrel (1), the included angle degree between the plane where the edge cutter (2) is located and the horizontal end face of the drilling end of the drilling barrel (1) is 60-65 degrees, and the edge cutter (2) is connected with the outer side wall of the drilling barrel (1).
2. The rotary drilling bit for the saturated soft loess formation according to claim 1, wherein: the length of the side knife (2) is more than 30cm and less than 50cm.
3. The rotary drill bit for the saturated soft loess formation as claimed in claim 1, wherein: when the drill cylinder (1) is vertically arranged, the lowest point of the edge cutter (2) is positioned below the drilling end of the drill cylinder (1).
4. The rotary drill bit for the saturated soft loess formation as claimed in claim 3, wherein: the lower end of the side cutter (2) is obliquely arranged towards the reverse direction along the rotating direction of the drill barrel (1).
5. The rotary drilling bit for the saturated soft loess formation according to claim 3, wherein: the thickness of the edge cutter (2) is gradually reduced along the rotation direction of the edge cutter, and a material guide inclined plane is formed on the inner side wall of the edge cutter (2).
6. The rotary drill bit for the saturated soft loess formation as claimed in claim 1, wherein: when the drilling cylinder (1) is vertically arranged, the vertical section of the drilling cylinder (1) passing through the axis of the drilling cylinder is isosceles trapezoid, and the number of the lower bottom angles of the isosceles trapezoid is 75-80 degrees.
7. The rotary drill bit for the saturated soft loess formation as claimed in claim 1, wherein: the outer side wall of the drill cylinder (1) is provided with a plurality of thread-shaped protective convex ribs (3).
8. A rotary drilling machine is characterized in that: the rotary excavating drill bit for the saturated soft loess formation as claimed in any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222504872.4U CN218206586U (en) | 2022-09-21 | 2022-09-21 | Rotary drilling bit and rotary drilling machine for saturated soft loess stratum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222504872.4U CN218206586U (en) | 2022-09-21 | 2022-09-21 | Rotary drilling bit and rotary drilling machine for saturated soft loess stratum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218206586U true CN218206586U (en) | 2023-01-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222504872.4U Active CN218206586U (en) | 2022-09-21 | 2022-09-21 | Rotary drilling bit and rotary drilling machine for saturated soft loess stratum |
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| Country | Link |
|---|---|
| CN (1) | CN218206586U (en) |
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2022
- 2022-09-21 CN CN202222504872.4U patent/CN218206586U/en active Active
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