CN216665507U - Stepped rotary jet drill bit - Google Patents
Stepped rotary jet drill bit Download PDFInfo
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- CN216665507U CN216665507U CN202122345200.9U CN202122345200U CN216665507U CN 216665507 U CN216665507 U CN 216665507U CN 202122345200 U CN202122345200 U CN 202122345200U CN 216665507 U CN216665507 U CN 216665507U
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Abstract
The utility model relates to the technical field of foundation reinforcement, and particularly discloses a stepped rotary jet drill bit; comprises a drill body, an upper blade and a lower blade; the top of the drill body is provided with a connector pipe, the middle part is provided with a drill hole contact pipe, and the bottom is provided with a drilling cone; the outer diameter of the drilling contact pipe is larger than that of the interface pipe, and the inner diameter of the drilling contact pipe is the same as that of the interface pipe; the drilling contact pipe is provided with a transition conical surface, and an inclined welding surface is arranged on the transition conical surface; the upper blade is welded on the inclined welding surface; a lower welding surface is arranged on the drilling cone, the radial distribution positions of the lower welding surface and the inclined welding surface on the drilling contact pipe are the same, and a lower blade is welded on the lower welding surface; the two sides of the drilling contact pipe are provided with guniting holes which are arranged in a staggered manner, and guniting heads are arranged in the guniting holes; the utility model solves the problems of uneven slurry distribution in the center and the circumference of the columnar consolidation body, lower strength after coagulation and less slurry amount sprayed by the drill bit at one time.
Description
Technical Field
The application relates to the technical field of foundation stabilization, and particularly discloses a stepped rotary jet drill bit.
Background
The jet grouting pile is characterized in that a jet grouting pipe and a nozzle drill are arranged at a designed elevation at the bottom of the pile by using a drilling machine, prepared grout in advance is sprayed out from a nozzle at the edge of the grouting pipe at a high speed after obtaining huge energy through a high-pressure generating device to form a stream with highly concentrated energy, a soil body is directly damaged, in the spraying process, a drill rod is lifted while rotating, so that the grout and the soil body are fully stirred and mixed, and a columnar solidification body with a certain diameter is formed in the soil, so that the foundation is reinforced.
The slurry is sprayed out of the drill bit, and the drill bit is lifted and sprayed at the same time; the existing drill bit has high energy of ejected slurry, different slurry qualities such as the moisture of sand and stone in the slurry, different distances from the existing drill bit to a soil body under high pressure, and uneven distribution of the slurry at the center of a columnar consolidation body and the slurry at the periphery of the columnar consolidation body; the one-time slurry spraying amount of the drill bit is small.
The present inventors have therefore provided a stepped jet rotary drill to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a stepped rotary jet drill bit, which aims to solve the problems that slurry is not uniformly distributed in the center and the circumference of a columnar consolidation body, the strength is low after the consolidation and the amount of slurry jetted out by the drill bit at one time is small.
In order to achieve the above object, the basic scheme of the present invention provides a stepped jet rotary drill, comprising a drill body, an upper blade and a lower blade; the top of the drill body is provided with a connector pipe, the middle part is provided with a drill hole contact pipe, and the bottom is provided with a drilling cone; the outer diameter of the drilling contact pipe is larger than that of the interface pipe, and the inner diameter of the drilling contact pipe is the same as that of the interface pipe; the drilling contact tube and the interface tube are provided with transition conical surfaces, and inclined welding surfaces are arranged on the transition conical surfaces; the upper blade is welded on the inclined welding surface; a lower welding surface is arranged on the drilling cone, the radial distribution positions of the lower welding surface and the inclined welding surface on the drilling contact pipe are the same, and a lower blade is welded on the lower welding surface; and guniting holes are formed in two sides of the drilling contact pipe and are arranged in a staggered mode, and guniting heads are arranged in the guniting holes.
By adopting the technical scheme, the method has the advantages that: after the slurry enters the drill bit, the slurry is firstly sprayed out from the slurry spraying head at the upper part of the drilling contact pipe under high pressure, the slurry pressure is firstly released from the slurry spraying head at the upper part, the sprayed slurry amount is large, and the distance of the slurry invading into the foundation for drilling is deep; after the slurry flows through the slurry spraying head at the upper part, the slurry spraying amount of the slurry spraying head at the bottom of the drill hole contact pipe is smaller, and the distance for the slurry sprayed by the slurry spraying head at the bottom to invade in a drill hole of a base is shallower; the slurry of the upper guniting head and the slurry of the lower guniting head are mixed, the radial mass distribution of the formed columnar consolidation body is uniform, the integral strength is higher, the slurry radiation range is larger, and the problems that the slurry of the center and the circumference of the columnar consolidation body is not uniform in distribution, and the strength is lower after the slurry is coagulated are solved; the staggered slurry spraying holes are formed in the drilling contact pipe, more slurry can be injected into the foundation drilling hole in unit time, the construction period is shortened, and the problem that the slurry amount sprayed out by the drill bit is small at one time is solved.
Furthermore, the two guniting holes are distributed at intervals up and down along the axial direction of the drill body, the two guniting holes are arranged in a back mode, and the distance between the upper portion and the lower portion is 100 mm-200 mm.
By adopting the technical scheme, the method has the advantages that: the drilling contact pipe is provided with the guniting holes which are vertically spaced, the spacing distance is moderate, and the slurry amount and the slurry dispersion range are balanced; the problems that slurry in the center and the circumference of the columnar consolidation body is not uniformly distributed and the strength is lower after the slurry is coagulated are solved.
Further, the guniting hole is arranged below the inclined welding surface; the guniting hole below the drilling contact pipe is tangent to the inner wall of the bottom of the drilling contact pipe; the guniting hole is a stepped hole.
By adopting the technical scheme, the method has the advantages that: the slurry spraying hole is tangent to the inner wall of the bottom of the drilling contact pipe, and slurry is not easy to remain at the bottom of the drilling contact pipe; the stepped hole is used for fixing the guniting head.
Furthermore, the inclined welding surface is parallel to the tangential plane of the transition conical surface; 4 inclined welding surfaces are uniformly arranged on the transition conical surface.
By adopting the technical scheme, the method has the advantages that: the inclined welding surface is parallel to the tangential plane of the transition conical surface, and after the blade is welded; the cutting edge of the upper blade is parallel to the tangential plane, when the drill bit is lifted, the cutting edge of the upper blade is parallel to the transition conical surface, and the stress direction is kept consistent; the broken soil and stones blocked by the top when the drill bit ascends can be effectively cut, and the occurrence of buried drilling accidents is prevented.
Furthermore, the top of the guniting head is provided with a fixing cap, the top of the fixing cap is provided with a cross key groove, and the bottom of the guniting head is provided with threads.
By adopting the technical scheme, the method has the advantages that: constructors can disassemble and assemble the guniting head through the cross key groove, and the guniting head can be positioned at the axial position of the guniting hole through the fixing cap.
Further, the diameter of the bottom of the drilling cone is smaller than the bottom surface of the drilling contact pipe, the top of the lower blade is welded with the bottom surface of the rotary hollow contact pipe, and the top of the drilling cone is cut to be sharp; the lower weld faces are parallel to the tangential plane of the drilling cone, and 4 lower weld faces are provided on the drilling cone.
By adopting the technical scheme, the method has the advantages that: the diameter of the bottom of the drilling cone is smaller than that of the bottom of the drill hole contact pipe, and a lower blade welding space is reserved for supporting the lower blade; the lower welding surface is parallel to the tangential plane of the drilling cone, the cutting edge of the lower blade is parallel to the transition conical surface, and the stress direction of the cutting edge on the transition conical surface is kept consistent.
Further, the device also comprises a drill rod; the drill rod is fixedly connected to the interface tube; the upper blade and the lower blade are uniformly provided with cutting teeth.
By adopting the technical scheme, the method has the advantages that: cutting the blocked soil macadam in the drill hole by the cutting teeth in the processes of pushing downwards and lifting upwards for grouting; and (4) using a drill rod to transport slurry and connecting a drill bit.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a stepped jet grouting drill bit according to an embodiment of the present application;
FIG. 2 shows a schematic view of the construction of the drill body of FIG. 1;
FIG. 3 shows a front view of the drill body of FIG. 1;
FIG. 4 shows a bottom view of FIG. 3;
fig. 5 shows an oblique perspective view of fig. 4.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The following is further detailed by the specific embodiments:
reference numerals in the drawings of the specification include: the drill bit comprises a drill body 1, an upper blade 2, a lower blade 3, cutting teeth 4, a guniting head 5, a drill rod 6, an inclined welding surface 7, a guniting hole 8, a lower welding surface 9 and a transition conical surface 10; a drill cone 101, a borehole contact tube 102, a mouthpiece 103.
An embodiment of the step jet drill is shown in figures 1-5,
the specific implementation process of the utility model comprises the following steps:
as shown in fig. 1: comprises a drill body 1, an upper blade 2 and a lower blade 3; the drill body 1, the upper blade 2 and the lower blade 3 are made of carbon tool steel T9A; the top of the drill body 1 is provided with a mouthpiece 103, the middle part is provided with a drill hole contact tube 102, and the bottom is provided with a drilling cone 101; the outer diameter of the drilling contact tube 102 is larger than that of the mouthpiece 103, and the inner diameters of the drilling contact tube 102 and the mouthpiece 103 are the same; the drilling contact tube 102 is provided with a transition conical surface 10, and the transition conical surface 10 is provided with an inclined welding surface 7; the upper blade 2 is welded on the inclined welding surface 7; a lower welding surface 9 is arranged on the drilling cone 101, the radial distribution positions of the lower welding surface 9 and the inclined welding surface 7 on the drilling contact pipe 102 are the same, and the lower blade 3 is welded on the lower welding surface 9; the two sides of the drilling contact pipe 102 are provided with two guniting holes 8, the two guniting holes 8 are distributed at intervals up and down along the axial direction of the drill body 1, the two guniting holes 8 are arranged in a back-to-back mode, namely the two guniting holes 8 are radially spaced by 180 degrees, and the upper and lower spacing distance is 100 mm. The drilling contact pipe 102 is provided with the grout spraying holes 8 which are spaced up and down, the spacing distance is moderate, and the amount of grout and the spreading range of the grout are balanced; solves the problems of uneven slurry distribution in the center and the circumference of the columnar consolidation body and lower strength after coagulation.
The guniting hole 8 is provided with a guniting head 5, and the guniting head 5 is made of carbon tool steel T9A.
Also comprises a drill rod 6; threads are arranged in the connector tube 103, and the drill rod 6 is connected to the connector tube 103 through the threads; cutting teeth 4 are uniformly arranged on the upper blade 2 and the lower blade 3, and the cutting teeth 4 are made of tungsten high-speed steel W18Cr 4V; the cutting teeth 4 cut the blocked soil macadam in the drill hole in the processes of pushing downwards and lifting upwards for grouting; the drill pipe 6 is used for transporting slurry and connecting the drill bit.
By adopting the technical scheme, the method has the advantages that: after the slurry enters the drill bit, the slurry is firstly sprayed out from the slurry spraying head 5 at the upper part of the drilling contact pipe 102 under high pressure, the slurry pressure is firstly released from the slurry spraying head 5 at the upper part, the sprayed slurry amount is large, and the distance of the slurry invading into the foundation for drilling is deep; after the slurry flows through the slurry spraying head 5 at the upper part, the slurry spraying amount of the slurry spraying head 5 at the bottom of the drilling contact pipe 102 is small, and the distance for the slurry sprayed by the slurry spraying head 5 at the bottom to invade in the drilling hole of the base is shallow; the grout of the upper grout spraying head 5 and the grout of the lower grout spraying head 5 are mixed, the radial mass distribution of the formed columnar consolidation body is uniform, the integral strength is higher, the grout radiation range is larger, and the problems that the grout in the center and the circumference of the columnar consolidation body is not uniformly distributed and the strength is lower after coagulation are solved; the slurry spraying holes 8 which are distributed at intervals are formed in the drilling contact pipe 102, more slurry can be injected into the foundation drilling hole in unit time, the construction period is shortened, and the problem that the slurry amount sprayed by the drill bit is small at one time is solved.
As shown in fig. 2 and 5: the guniting hole 8 is arranged below the inclined welding surface 7; the guniting hole 8 below the drilling contact pipe 102 is tangent to the inner wall of the bottom of the drilling contact pipe 102; the guniting hole 8 is a stepped hole, and threads are arranged at the bottom of the stepped hole.
By adopting the technical scheme, the method has the advantages that: the slurry spraying hole 8 is tangent to the inner wall of the bottom of the drilling contact pipe 102, and slurry is not easy to remain at the bottom of the drilling contact pipe 102; the stepped hole is used for fixing the guniting head 5.
As shown in fig. 3: the inclined welding surface 7 is parallel to the tangential plane of the transition conical surface 10; 4 inclined welding surfaces 7 are uniformly arranged on the transition conical surface 10.
By adopting the technical scheme, the method has the advantages that: the inclined welding surface 7 is parallel to the tangential plane of the transition conical surface 10, and after the upper blade 2 is welded; the cutting edge of the upper blade 2 is parallel to the tangential plane, when the drill bit is lifted, the cutting edge of the upper blade 2 is parallel to the transition conical surface 10, and the stress direction is kept consistent.
As shown in fig. 1: the top of the guniting head 5 is provided with a fixing cap, the top of the fixing cap is provided with a cross-shaped key groove, and the center of the cross-shaped key groove of the fixing cap is provided with a slurry circulation hole; the bottom of the guniting head 5 is provided with threads, and the guniting head 5 is in threaded connection with the guniting hole 8.
By adopting the technical scheme, the method has the advantages that: constructor passes through cross keyway dismouting whitewashing head 5, and whitewashing head 5 passes through the axial position of locking nut location whitewashing head 5 at whitewashing hole 8.
As shown in fig. 4: the diameter of the bottom of the drilling cone 101 is smaller than that of the bottom surface of the drilling contact pipe 102, the top of the lower blade 3 is welded with the bottom surface of the rotary hollow contact pipe, and the top of the drilling cone 101 is sharpened; the lower weld faces 9 are parallel to the tangential plane of the drill cone 101, and 4 lower weld faces 9 are provided on the drill cone 101.
By adopting the technical scheme, the method has the advantages that: the diameter of the bottom of the drilling cone 101 is smaller than that of the bottom surface of the drill hole contact pipe 102, so that a welding space of the lower blade 3 is reserved, and the lower blade 3 is supported; the lower welding surface 9 is parallel to the tangential plane of the drilling cone 101, the cutting edge of the lower blade 3 is parallel to the transition conical surface 10, and the stress direction of the cutting edge on the transition conical surface 10 is kept consistent.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not necessarily depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (7)
1. The ladder spouts drill bit soon, its characterized in that: comprises a drill body, an upper blade and a lower blade; the top of the drill body is provided with a connector pipe, the middle part is provided with a drill hole contact pipe, and the bottom is provided with a drilling cone; the outer diameter of the drilling contact pipe is larger than that of the interface pipe, and the inner diameter of the drilling contact pipe is the same as that of the interface pipe; the drilling contact tube and the interface tube are provided with transition conical surfaces, and inclined welding surfaces are arranged on the transition conical surfaces; the upper blade is welded on the inclined welding surface; a lower welding surface is arranged on the drilling cone, the radial distribution positions of the lower welding surface and the inclined welding surface on the drilling contact pipe are the same, and a lower blade is welded on the lower welding surface; and guniting holes are formed in two sides of the drilling contact pipe and are arranged in a staggered mode, and guniting heads are arranged in the guniting holes.
2. The stepped jet rotary drill bit of claim 1, wherein: the two guniting holes are distributed at intervals up and down along the axial direction of the drill body, the two guniting holes are arranged in a back mode, and the distance between the upper portion and the lower portion is 100 mm-200 mm.
3. The stepped jet rotary drill bit of claim 2, wherein: the guniting hole is arranged below the inclined welding surface; the guniting hole below the drilling contact pipe is tangent to the inner wall of the bottom of the drilling contact pipe; the guniting hole is a stepped hole.
4. The stepped jet rotary drill bit of claim 3, wherein: the inclined welding surface is parallel to the tangential plane of the transition conical surface; 4 inclined welding surfaces are uniformly arranged on the transition conical surface.
5. The stepped jet rotary drill bit of claim 4, wherein: the top of the guniting head is provided with a fixing cap, the top of the fixing cap is provided with a cross key groove, and the bottom of the guniting head is provided with threads.
6. The stepped jet rotary drill bit of claim 5, wherein: the diameter of the bottom of the drilling cone is smaller than that of the bottom surface of the drilling contact pipe, the top of the lower blade is welded with the bottom surface of the rotary hollow contact pipe, and the top of the drilling cone is cut to be sharp; the lower weld faces are parallel to the tangential plane of the drilling cone, and 4 lower weld faces are provided on the drilling cone.
7. The stepped jet rotary drill bit of claim 6, wherein: the drilling machine also comprises a drill rod; the drill rod is fixedly connected to the interface tube; the upper blade and the lower blade are uniformly provided with cutting teeth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122345200.9U CN216665507U (en) | 2021-09-27 | 2021-09-27 | Stepped rotary jet drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122345200.9U CN216665507U (en) | 2021-09-27 | 2021-09-27 | Stepped rotary jet drill bit |
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| Publication Number | Publication Date |
|---|---|
| CN216665507U true CN216665507U (en) | 2022-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122345200.9U Active CN216665507U (en) | 2021-09-27 | 2021-09-27 | Stepped rotary jet drill bit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115874601A (en) * | 2022-11-10 | 2023-03-31 | 中化学土木工程有限公司 | Efficient anti-solidification grouting device and grouting method |
| CN117188957A (en) * | 2023-11-06 | 2023-12-08 | 山东省煤田地质局第三勘探队 | Drilling and obstacle removing equipment for mine rescue |
-
2021
- 2021-09-27 CN CN202122345200.9U patent/CN216665507U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115874601A (en) * | 2022-11-10 | 2023-03-31 | 中化学土木工程有限公司 | Efficient anti-solidification grouting device and grouting method |
| CN115874601B (en) * | 2022-11-10 | 2023-11-10 | 中化学土木工程有限公司 | High-efficiency solidification-preventing grouting device and grouting method |
| CN117188957A (en) * | 2023-11-06 | 2023-12-08 | 山东省煤田地质局第三勘探队 | Drilling and obstacle removing equipment for mine rescue |
| CN117188957B (en) * | 2023-11-06 | 2024-01-30 | 山东省煤田地质局第三勘探队 | Drilling and obstacle removing equipment for mine rescue |
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