CN216588671U - Self-drilling anchor rod system adopting conical connection - Google Patents
Self-drilling anchor rod system adopting conical connection Download PDFInfo
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- CN216588671U CN216588671U CN202122969755.0U CN202122969755U CN216588671U CN 216588671 U CN216588671 U CN 216588671U CN 202122969755 U CN202122969755 U CN 202122969755U CN 216588671 U CN216588671 U CN 216588671U
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- anchor rod
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- rod body
- drill bit
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Abstract
The utility model relates to the field of rock-soil anchoring, in particular to a self-drilling anchor rod system adopting conical connection, which comprises a hollow anchor rod body and a drill bit, wherein the hollow anchor rod body comprises an anchor rod body and a cone, the anchor rod body is provided with an external thread, the cone is arranged at the end part of the anchor rod body, and the cone is provided with a through hole communicated with the anchor rod body; the drill bit comprises a connecting part and a drill bit body, wherein a conical inner hole is formed in the connecting part, and the conical inner hole is matched with the cone. The utility model forms conical connection by the tight fit of the cone and the conical inner hole, realizes the fixed connection of the hollow anchor rod body and the drill bit, has simple structure, can ensure the strength of the anchor rod under the requirement of smaller diameter, reduces the engineering cost, has simple and convenient installation mode and high operation speed, and improves the construction efficiency of drilling.
Description
Technical Field
The utility model relates to the field of rock and soil anchoring, in particular to a self-drilling anchor rod system adopting conical connection.
Background
The self-drilling anchor rod system mainly comprises a hollow anchor rod body with full-length external threads, a disposable internal thread anchoring drill bit and the like, the self-drilling anchor rod is a novel anchoring process, drilling, grouting and anchoring are integrated, the problem of difficult pore forming under loose geological conditions is solved, the construction efficiency is greatly improved, and a good anchoring effect is achieved. In recent years, self-drilling bolts are used in mine support more and more widely. In such scenarios it is desirable that the bolt hole diameter be sufficiently small. However, the hollow anchor rod body and the drill bit of the self-drilling anchor rod are usually connected by screw threads, and the drill bit is internally threaded, in this case, if the drill hole diameter is small, the strength of the drill bit trousers is affected, and the drill hole diameter is difficult to reach the expectation of customers. Meanwhile, the traditional threaded connection needs to be screwed in during installation, and time and labor are wasted.
Disclosure of Invention
The utility model provides a self-drilling anchor rod system adopting conical connection, aiming at solving the problem that a hollow anchor rod body and a drill bit which are in threaded connection cannot be used for drilling under a smaller diameter, and the self-drilling anchor rod system is simple in structure, capable of ensuring the strength of an anchor rod under the condition of a smaller diameter requirement, reducing the construction cost, simple and convenient in installation mode, high in operation speed and capable of improving the construction efficiency of drilling.
In order to achieve the purpose, the technical scheme of the utility model is as follows:
a self-drilling anchor rod system adopting conical connection comprises a hollow anchor rod body and a drill bit, wherein the hollow anchor rod body comprises an anchor rod body and a cone, the anchor rod body is provided with external threads, the cone is arranged at the end part of the anchor rod body, and the cone is provided with a through hole communicated with the anchor rod body; the drill bit comprises a connecting part and a drill bit body, wherein a conical inner hole is formed in the connecting part, and the conical inner hole is matched with the cone.
In a further preferred embodiment, the cone has a cone angle ofαAngle of 12 degree or moreα≥5°。
In a further preferred embodiment, the diameter of the large diameter end of the cone isd 1The outer diameter of the anchor rod body isD 1，D 1- d 1≥2mm。
In a further preferred embodiment, the diameter of the large-diameter end of the tapered inner hole of the connecting part isd 2，d 2＜d 1。
In a further preferred embodiment, the length of the tapered inner hole of the connecting part isL 2The length of the cone isL 1SaidL 2＜L 1。
In a further preferred scheme, a gasket is arranged between the conical inner hole of the connecting part and the cone.
In further preferred aspects, the types of bit bodies include, but are not limited to, cross bits and button bits.
Through the technical scheme, the utility model has the beneficial effects that:
the hollow anchor rod body comprises an anchor rod body and a cone, the drill bit comprises a connecting part and a drill bit body, a conical inner hole matched with the cone is formed in the connecting part, and conical connection is formed by tight matching of the cone and the conical inner hole, so that the hollow anchor rod body and the drill bit are fixedly connected. Under the condition that the requirement on the diameter of a drilled hole is small, the strength of the drill bit and the hollow anchor rod body and the connection strength of the connection part can be ensured, and compared with the mode of adopting threaded connection in the prior art, the strength is greatly increased, so that the requirement on the small diameter of the drilled hole can be more easily met, and the construction cost is greatly reduced; and the fixing mode is simple, the installation speed is high, a knob is not needed, and the drilling construction efficiency is improved.
Drawings
FIG. 1 is a schematic representation of the construction of a self-drilling anchor rod system of the present invention utilizing a tapered connection;
FIG. 2 is a schematic view of the hollow anchor rod of the present invention;
FIG. 3 is a second schematic view of the hollow anchor rod of the present invention;
fig. 4 is a schematic view of the structure of the drill bit of the present invention.
The reference numbers in the drawings are as follows: 1 is the hollow anchor rod body, 11 is the stock body, 12 is the cone, 2 is the drill bit, 21 is the connecting portion.
Detailed Description
The utility model is further described with reference to the following figures and detailed description:
in the description of the present invention, it should be understood that the terms "left", "right", "upper", "lower", "transverse", "vertical", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in fig. 1, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1 to 4, the present embodiment provides a self-drilling anchor rod system adopting conical connection, including a hollow anchor rod body 1 and a drill bit 2, where the hollow anchor rod body 1 includes an anchor rod body 11 and a cone 12, the anchor rod body 11 is provided with an external thread, the anchor rod body 11 is provided with an axial through hole, the cone 12 is arranged at an end of the anchor rod body 11, and the cone 12 is provided with a through hole communicated with the anchor rod body 11; the drill bit 2 comprises a connecting portion 21 and a drill bit body, the connecting portion 21 and the drill bit body are of an integral structure, a conical inner hole is formed in the connecting portion 21, and the conical inner hole is matched with the cone 12. The hollow anchor rod body 1 and the drill bit 2 form cone connection through the cone 12 and the conical inner hole, and during construction, the cone 12 is inserted into the conical inner hole of the connecting part of the drill bit and is wedged tightly under the impact action of the rock drill, so that drilling is realized. Under the condition that the requirement on the diameter of a drilled hole is small, the strength of the drill bit trousers body connected by the cone is greatly increased, the drilled hole diameter can easily reach the expectation that the diameter of a client is smaller, and the construction cost can be greatly reduced. And the conical connection is fast in installation speed, and does not need to be turned, so that the construction efficiency is improved.
In the above, the cone angle corresponding to the cone 12 isαAngle of 12 degree or moreαNot less than 5 degrees. The angle of taperαThe range of (2) can meet the connection between the hollow anchor rod body 1 and the drill bit 2 under the condition of smaller diameter of the drilled hole, and the strength of the cone can be ensured.
The diameter of the large diameter end of the cone 12 is as described aboved 1The outer diameter of the anchor rod body 11 isD 1，D 1- d 1≥2mm。
In the above, the diameter of the large-diameter end of the tapered inner hole of the connecting part 21 isd 2，d 2＜d 1The length of the conical inner hole of the connecting part 21 isL 2The length of the cone 12 isL 1SaidL 2＜L1The compactness of toper connection is guaranteed, avoids the tip of the big footpath end of connecting portion and the external screw thread department of stock body 11 to take place the contact simultaneously, forms and interferes to avoid causing harmful effects to drilling.
In order to further optimize the product structure, a gasket is arranged between the conical inner hole of the connecting part 21 and the cone 12. The connection firmness and the connection strength between the cone 12 and the connecting part 21 are increased by the arrangement of the gasket.
Types of the bit body include, but are not limited to, cross bits and button bits.
The thread direction of the anchor rod body 1 can be any thread direction.
The above-described embodiments are merely preferred embodiments of the present invention, and not intended to limit the scope of the utility model, so that equivalent changes or modifications in the structure, features and principles described in the present invention should be included in the claims of the present invention.
Claims (7)
1. A self-drilling anchor rod system adopting conical connection is characterized by comprising a hollow anchor rod body (1) and a drill bit (2), wherein the hollow anchor rod body (1) comprises an anchor rod body (11) and a cone (12), an external thread is arranged on the anchor rod body (11), the cone (12) is arranged at the end part of the anchor rod body (11), and a through hole communicated with the anchor rod body (11) is formed in the cone (12); the drill bit (2) comprises a connecting part (21) and a drill bit body, wherein a conical inner hole is formed in the connecting part (21), and the conical inner hole is matched with the cone (12).
2. A self drilling anchor rod system using taper connection according to claim 1, wherein the taper angle corresponding to the taper (12) isαAngle of 12 degree or moreα≥5°。
3. A self drilling anchor rod system using taper connection according to claim 1, wherein the diameter of the large diameter end of the taper (12) isd 1The outer diameter of the anchor rod body (11) isD 1，D 1- d 1≥2mm。
4. A self drilling anchor rod system using taper connection according to claim 3, wherein the diameter of the large diameter end of the tapered bore of the connecting portion (21) isd 2，d 2＜d 1。
5. A self drilling anchor rod system using taper connection according to claim 4, wherein the length of the tapered bore of the connecting portion (21) isL 2The length of the cone (12) isL 1SaidL 2＜L 1。
6. A self drilling anchor rod system using a tapered connection according to claim 1, wherein a packing is provided between the tapered bore of the connection portion (21) and the cone (12).
7. A self drilling bolt system with a tapered connection as claimed in claim 1, wherein the type of bit body includes but is not limited to cross bits and button bits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122969755.0U CN216588671U (en) | 2021-11-30 | 2021-11-30 | Self-drilling anchor rod system adopting conical connection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122969755.0U CN216588671U (en) | 2021-11-30 | 2021-11-30 | Self-drilling anchor rod system adopting conical connection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216588671U true CN216588671U (en) | 2022-05-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122969755.0U Active CN216588671U (en) | 2021-11-30 | 2021-11-30 | Self-drilling anchor rod system adopting conical connection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216588671U (en) |
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2021
- 2021-11-30 CN CN202122969755.0U patent/CN216588671U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A self drilling anchor rod system with conical connection Effective date of registration: 20230829 Granted publication date: 20220524 Pledgee: Zhongyuan bank Limited by Share Ltd. Luoyang branch Pledgor: LOUYANG HENGNUO ANCHOR TECHNOLOGY CO.,LTD. Registration number: Y2023980054108 |