CN210768600U - Rotary wing type concentric hole-expanding pipe-following drilling tool - Google Patents
Rotary wing type concentric hole-expanding pipe-following drilling tool Download PDFInfo
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- CN210768600U CN210768600U CN201921288429.XU CN201921288429U CN210768600U CN 210768600 U CN210768600 U CN 210768600U CN 201921288429 U CN201921288429 U CN 201921288429U CN 210768600 U CN210768600 U CN 210768600U
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- drill bit
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- drilling tool
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Abstract
The utility model discloses a rotary wing type concentric reaming and pipe following drilling tool, which comprises a center drill bit and a rotary wing drill bit, wherein a pin hole is formed on the circumference of one side of the center drill bit, and the front end surface of the center drill bit is provided with two symmetrically distributed concave holes; a cavity penetrating to the tail end along the axial direction of the central drill bit is arranged in the central drill bit; the rotary wing drill bit is provided with a rotating shaft in the concave hole; a semi-circumference limiting groove is arranged on the rotating shaft; the rotary wing drill bit is provided with a plurality of alloy drill teeth. The utility model aims at, this drilling tool adopts the concentric reaming structure of rotor formula, through the optimization to the drilling tool structure, has strengthened the intensity of drilling tool, has prolonged the life of drilling tool by a wide margin.
Description
Technical Field
The utility model belongs to the drilling tool field specifically is a concentric reaming with one heart of rotor formula is with pipe drilling tool.
Background
The down-the-hole drill is mainly used in the drilling blasting work under soft rock stratum and covering rock stratum, and the upper rock stratum is soft or has a covering material, so that the formed hole diameter can not be drilled in the drilling blasting, and the down-the-hole drill can be used for deeper drilling work only by fixing and forming in the upper loose rock stratum.
In the drilling work of soft rock stratum and covering rock stratum, because secondary drilling is usually needed or other drilling tools are adopted, the existing pipe-following drilling tool has the problems of unstable structure, low strength, easy damage, short service life, difficult ash discharge and the like in the use process, and therefore the structure of the existing pipe-following drilling tool needs to be improved and optimized.
SUMMERY OF THE UTILITY MODEL
The utility model aims at above problem, provide a concentric reaming with one heart pipe drilling tool of rotor formula, this drilling tool adopts the concentric reaming structure of rotor formula, through the optimization to the drilling tool structure, has strengthened the intensity of drilling tool, has prolonged the life of drilling tool by a wide margin.
In order to realize the above purpose, the utility model adopts the technical scheme that: an eccentric reaming pipe following drilling tool comprises a center drill bit and a rotor drill bit, wherein a pin hole is formed in the circumference of one side of the center drill bit, and two symmetrically distributed concave holes are formed in the front end face of the center drill bit; a cavity penetrating to the tail end along the axial direction of the central drill bit is arranged in the central drill bit; the rotary wing drill bit is provided with a rotating shaft in the concave hole; a semi-circumference limiting groove is formed in the rotating shaft; the front end of the rotary wing drill bit is provided with drill teeth; pin rods are arranged in the pin holes and the semi-circumference limiting grooves; the front end face of the rotor drill bit is provided with a dust guide groove.
Further, a first-stage arc-shaped drilling surface and a second-stage arc-shaped drilling surface are respectively arranged on the outer side of the front end of the rotary wing drill bit from inside to outside; and the first-stage arc-shaped drilling surface and the second-stage arc-shaped drilling surface are provided with alloys.
Furthermore, the head end of the central drill bit is provided with a gas blowing hole penetrating into the cavity.
Furthermore, an ash discharge groove used for being matched with the ash guide groove is arranged at the air blowing hole.
Furthermore, the drill teeth are made of hard alloy.
Furthermore, the shape of the tooth head of the drill tooth is a semispherical shape, a semi-elliptic shape, a conical sphere shape or a semi-elastic tooth shape.
The utility model has the advantages that: the rotary wing type concentric hole expanding structure is adopted in the drilling tool, the strength of the drilling tool is enhanced through optimization of the drilling tool structure, and the service life of the drilling tool is greatly prolonged. In the utility model, when the rotor drill bit at the front end rotates forwards, the rotor drill bit is driven to be divided into two concentric uniform parts to rotate outwards to open the two parts, so as to realize reaming; meanwhile, the multistage arc-shaped drilling surface is utilized to avoid overlarge abrasion pressure of the front end surface during reaming and drilling, and the working efficiency and the service life of the device are further improved through the matching of the ash guide groove and the ash discharge groove.
Drawings
Fig. 1 is a schematic view of the structure of the present invention.
Fig. 2 is a left side view structure diagram of the present invention.
Fig. 3 is a schematic view of the front view structure of the present invention.
Fig. 4 is a schematic cross-sectional view taken along line a-a in fig. 3.
Fig. 5 is a schematic view of the three-dimensional structure of the rotary wing drill bit of the present invention.
Fig. 6 is a schematic perspective view of the center drill of the present invention.
Fig. 7 is a schematic cross-sectional view of the pin shaft of the present invention.
The text labels in the figures are represented as: 1. a center drill; 101. a pin hole; 102. a pin rod; 103. concave holes; 11. a cavity; 12. a gas blowing hole; 121. an ash discharge groove; 2. a rotary wing drill bit; 201. a first-stage arc-shaped drilling surface; 202. a secondary arc-shaped drilling surface; 203. a dust guide groove; 204. a rotating shaft; 205. a semi-circumferential limit groove; 3. drilling teeth; 4. a limiting rod.
Detailed Description
In order to make the technical solution of the present invention better understood, the present invention is described in detail below with reference to the accompanying drawings, and the description of the present invention is only exemplary and explanatory, and should not be construed as limiting the scope of the present invention.
As shown in fig. 1-7, the specific structure of the present invention is: an eccentric reaming pipe following drilling tool comprises a center drill bit 1 and a rotor drill bit 2, wherein a pinhole 101 is formed in the circumference of one side of the center drill bit 1, and two concave holes 103 which are symmetrically distributed are formed in the front end face of the center drill bit 1; a cavity 11 which penetrates to the tail end along the axial direction of the central drill bit 1 is arranged in the central drill bit 1; a rotating shaft 204 is arranged in the concave hole of the rotary wing drill bit 2; a semi-circumference limiting groove 205 is formed in the rotating shaft 204; the front end of the rotor wing drill bit 2 is provided with drill teeth 3; the pin holes 101 and the semi-circumference limiting grooves 205 are internally provided with pin rods 102; the front end face of the rotary wing drill bit 2 is provided with a dust guide groove 203.
Preferably, the outer side of the front end of the rotary wing drill bit 2 is respectively provided with a primary arc-shaped drilling surface 201 and a secondary arc-shaped drilling surface 202 from inside to outside; and the first-stage arc-shaped drilling surface 201 and the second-stage arc-shaped drilling surface 202 are provided with alloys.
Preferably, the head end of the center drill 1 is provided with a blowing hole 12 penetrating into the cavity 11.
Preferably, the blowing hole 12 is provided with an ash discharge groove 121 for matching with the ash guide groove 203.
Preferably, the drill teeth 3 are made of hard alloy.
Preferably, the shape of the tooth head of the drill tooth 3 is a semispherical shape, a semi-elliptic shape, a conical sphere shape or a semi-elastic tooth shape.
When the rotary wing drill bit is used, the rotary wing drill bit at the front end can drive the rotary wing drill bit to be divided into two concentric uniform parts to slide outwards to realize hole expansion when rotating forwards; meanwhile, the multistage arc-shaped drilling surface is utilized to avoid overlarge abrasion pressure of the front end surface during reaming and drilling, and the working efficiency and the service life of the device are further improved through the matching of the ash guide groove and the ash discharge groove.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The principles and embodiments of the present invention have been explained herein using specific examples, which are presented only to assist in understanding the methods and their core concepts. The foregoing is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes can be made without departing from the principle of the present invention, and the above technical features can be combined in a proper manner; the application of these modifications, variations or combinations, or the application of the concepts and solutions of the present invention in other contexts without modification, is not intended to be considered as a limitation of the present invention.
Claims (6)
1. A rotary wing type concentric hole expanding and pipe following drilling tool is characterized by comprising a center drill bit (1) and a rotary wing drill bit (2), wherein a pin hole (101) is formed in the circumference of one side of the center drill bit (1), and two symmetrically distributed concave holes (103) are formed in the front end face of the center drill bit (1); a cavity (11) which penetrates to the tail end along the axial direction of the central drill bit (1) is arranged in the central drill bit (1); a rotary shaft (204) is arranged in the concave hole of the rotary wing drill bit (2); a semi-circumference limiting groove (205) is formed in the rotating shaft (204); the front end of the rotor wing drill bit (2) is provided with drill teeth (3); a pin rod (102) is arranged in the pin hole (101) and the semi-circumference limiting groove (205); the front end face of the rotor drill bit (2) is provided with a dust guide groove (203).
2. The rotary wing type concentric reaming and casing drilling tool according to claim 1, characterized in that a primary arc-shaped drilling surface (201) and a secondary arc-shaped drilling surface (202) are respectively arranged on the outer side of the front end of the rotary wing drill bit (2) from inside to outside; and the first-stage arc-shaped drilling surface (201) and the second-stage arc-shaped drilling surface (202) are provided with alloys.
3. A rotary wing type concentric reaming and pipe following drilling tool according to claim 1, characterized in that the head end of the central drill bit (1) is provided with a blow hole (12) penetrating into the cavity (11).
4. A rotary wing type concentric reaming and pipe following drilling tool according to claim 3, characterized in that an ash discharge groove (121) for matching with the ash guide groove (203) is arranged at the air blowing hole (12).
5. A rotary wing type concentric reaming casing following drilling tool according to claim 1, characterized in that the drilling teeth (3) are made of cemented carbide.
6. A rotary wing type concentric reaming casing following drilling tool according to claim 1, characterized in that the shape of the tooth head of the drilling tooth (3) is hemispherical, semi-elliptical, conical spherical or semi-elastic tooth shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921288429.XU CN210768600U (en) | 2019-08-09 | 2019-08-09 | Rotary wing type concentric hole-expanding pipe-following drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921288429.XU CN210768600U (en) | 2019-08-09 | 2019-08-09 | Rotary wing type concentric hole-expanding pipe-following drilling tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210768600U true CN210768600U (en) | 2020-06-16 |
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ID=71038757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921288429.XU Active CN210768600U (en) | 2019-08-09 | 2019-08-09 | Rotary wing type concentric hole-expanding pipe-following drilling tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210768600U (en) |
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2019
- 2019-08-09 CN CN201921288429.XU patent/CN210768600U/en active Active
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