CN216894257U - Drill bit for coal mine gas extraction - Google Patents
Drill bit for coal mine gas extraction Download PDFInfo
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- CN216894257U CN216894257U CN202123044371.4U CN202123044371U CN216894257U CN 216894257 U CN216894257 U CN 216894257U CN 202123044371 U CN202123044371 U CN 202123044371U CN 216894257 U CN216894257 U CN 216894257U
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Abstract
The utility model discloses a drill bit for coal mine gas extraction, which comprises a main drill bit, wherein the main drill bit is of a hollow cylindrical structure, the lower end of the main drill bit is connected with two sets of cutting wings which are oppositely arranged, the lower ends of the cutting wings are fixedly connected with a plurality of sets of main drilling cutter heads, the middle part of the lower end of the main drill bit is provided with a through hole, the lower end of the through hole is provided with a clamping groove, an auxiliary drill bit is embedded in the through hole, the auxiliary drill bit is fixedly connected with a clamping block matched with the clamping groove, the upper end of the clamping block is provided with a connecting section, the upper part of the connecting section is provided with an internal thread connector, the lower end of the connecting section is symmetrically provided with lock holes, and the inner wall of the through hole is provided with a spring lock matched with the lock holes. The utility model aims to provide a coal mine gas extraction drill bit which is high in drilling efficiency and capable of preventing hole collapse.
Description
Technical Field
The utility model relates to the technical field of coal mine equipment, in particular to a drill bit for coal mine gas extraction.
Background
In the process of mining high-gas coal mines, according to the principle of 'extracting before pumping', gas drainage must be performed firstly, and no matter which drill rod is used in the gas drainage process, once drilling is in place, the drill rod is pumped out, and gas in a coal seam is slowly discharged from a gas drainage hole. However, in the actual operation process, the soft coal seam has more chances, and after the drill rod is extracted, the soft coal seam collapses, so that the gas extraction pipe cannot go deep to the bottom of the gas extraction hole, the gas cannot be effectively extracted, and serious potential safety hazards are brought to subsequent coal mining. And drilling again increases the cost and delays the time, and cannot ensure that the coal bed does not collapse.
Through retrieval, patent No. CN201610745533.1 discloses a coal mine gas extraction hole drill bit, in which a grate is arranged at the top end of the drill bit, and a gas extraction pipe can jack the grate to extract a drill rod and the drill bit. However, the grate is low in strength, and is easy to deform and damage due to impact during drilling, so that the drill bit can not normally drill, and the grate can be blocked by soil and stones during drilling, so that the grate can not be smoothly jacked open by the gas extraction pipe.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model aims to provide the drill bit for coal mine gas extraction, which has high drilling efficiency and can prevent hole collapse.
The technical scheme adopted by the utility model for realizing the purpose is as follows: the utility model provides a colliery is drill bit for gas drainage, includes the main drill bit, the main drill bit is hollow tubular structure, the main drill bit lower extreme is connected with two sets of cutting wings that set up in opposite directions, cutting wing lower extreme rigid coupling has multiunit main drilling tool bit, the opening has been seted up at the middle part of main drill bit lower extreme, the joint groove has been seted up to the opening lower extreme, the embedded vice drill bit that is equipped with of opening, the joint piece of fixedly connected with and joint groove looks adaptation on the vice drill bit, joint piece upper end is equipped with the linkage segment, linkage segment upper portion is equipped with the female connector, two sets of lockholes that the symmetry set up are seted up to the linkage segment lower extreme, install the spring lock with lockhole looks adaptation on the opening inner wall.
And water injection holes are symmetrically formed in two sides of the opening of the main drill bit.
The lower end of the auxiliary drill bit is connected with two groups of auxiliary drilling tool bits which are arranged oppositely.
The spring lock comprises a limiting cylinder, a spring and an inclined spring bolt, wherein the inclined spring bolt is fixedly mounted at the front end of the limiting cylinder, and the spring is mounted in the limiting cylinder.
Still be provided with gas drainage pipe in the main drill bit, gas drainage socle portion is equipped with the external screw thread connector with female screw thread connector looks adaptation, just gas drainage pipe lower extreme has seted up the multiunit aspirating hole.
The utility model has the beneficial effects that: the auxiliary drill bit is additionally arranged, so that the drilling efficiency is improved; the auxiliary drill bit can be separated from the main drill bit, the main drill bit can be withdrawn after the auxiliary drill bit is connected with the gas extraction pipe, and the auxiliary drill bit is matched with the gas extraction pipe to extract gas, so that hole collapse is prevented.
Drawings
FIG. 1 is a schematic view of a borehole configuration according to the present invention;
FIG. 2 is a schematic view of an extraction structure of the present invention;
fig. 3 is an enlarged schematic view of part a of the present invention.
In the figure: the gas extraction device comprises a main drill bit 1, a cutting wing 2, a main drilling tool bit 3, an auxiliary drill bit 4, a clamping groove 5, a clamping block 6, a connecting section 7, an internal thread connector 8, a lockhole 9, a spring lock 10, a water injection hole 11, an auxiliary drilling tool bit 12, a limiting barrel 13, a spring 14, an inclined bolt 15, a gas extraction pipe 16, an external thread connector 17 and an extraction hole 18.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, 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 invention.
Referring to fig. 1-3, a drill bit for coal mine gas extraction comprises a main drill bit 1, wherein the main drill bit 1 is a hollow cylindrical structure, the lower end of the main drill bit 1 is connected with two sets of cutting wings 2 which are oppositely arranged, the lower ends of the cutting wings 2 are provided with a plurality of sets of main drilling tool bits 3, the middle part of the lower end of the main drill bit 1 is provided with a through hole, the lower end of the through hole is provided with a clamping groove 5, an auxiliary drill bit 4 is embedded in the through hole, the auxiliary drill bit 4 is fixedly connected with a clamping block 6 which is matched with the clamping groove 5, the clamping groove 5 is a square groove, the clamping block 6 is a square block which is matched with the clamping groove 5 and is used together with the clamping groove 5, the auxiliary drill bit 4 and the main drill bit 1 are kept to rotate oppositely when drilling, the upper end of the clamping block 6 is provided with a connecting section 7, the upper part of the connecting section 7 is provided with an internal thread connector 8 for connecting with a gas extraction pipe 16, the lower end of the connecting section 7 is provided with two sets of symmetrical lockholes 9, and a spring 14 lock 10 matched with the lock hole 9 is arranged on the inner wall of the through hole and used for locking the auxiliary drill bit 4 and preventing the auxiliary drill bit 4 from falling.
According to the utility model, water injection holes 11 are symmetrically formed in two sides of the through opening of the main drill bit 1, high-pressure water flow is injected into the cavity of the main drill bit 1 during drilling, and high-pressure water is injected from the water injection holes 11, so that the cooling, lubricating and slag discharging effects are achieved during drilling.
The lower end of the auxiliary drill bit 4 is connected with two sets of auxiliary drilling tool bits 12 which are oppositely arranged, so that the drilling capability is enhanced, and the auxiliary drill bit 4 is conveniently separated.
The main drill bit 1 is internally provided with a gas extraction pipe 16, the bottom of the gas extraction pipe 16 is provided with an external thread connector 17 matched with the internal thread connector 8, the connection is convenient, and the lower end of the gas extraction pipe 16 is provided with a plurality of groups of extraction holes 18 for extracting gas.
The working principle of the utility model is as follows: when in use, the auxiliary drill bit 4 is embedded in the through hole of the main drill bit 1, the spring 14 lock 10 arranged on the inner wall of the through hole is locked in the lock hole 9 arranged at the lower end of the connecting section 7, so that the auxiliary drill bit 4 is fixedly arranged on the main drill bit 1, the main drill bit 1 is connected with a drill rod, when the main drill bit 1 drills, the clamping block 6 on the auxiliary drill bit 4 is tightly clamped in the clamping groove 5, so that the auxiliary drill bit 4 and the main drill bit 1 keep rotating oppositely, simultaneously, high-pressure water flow is injected into the cavity of the main drill bit 1, the high-pressure water is injected from the water injection hole 11, cooling, lubricating and deslagging the main drill bit 1 and the auxiliary drill bit 4, connecting an external thread connector 17 of a gas extraction pipe 16 with an internal thread connector 8 at the upper end of the auxiliary drill bit 4 after drilling is finished, then upwards withdrawing the main drill bit 1, automatically withdrawing the inclined lock tongue 15 under the pushing of the connecting section 7, and then performing gas extraction through an extraction hole 18 in the gas extraction pipe 16.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. The utility model provides a colliery is drill bit for gas drainage, includes main drill bit (1), its characterized in that: the utility model discloses a drilling tool, including main drill bit (1), cutting wing (2), joint groove (5), joint piece (6) of fixedly connected with and joint groove (5) looks adaptation are gone up to auxiliary drill bit (4), joint piece (6) of fixedly connected with and joint groove (5) looks adaptation are equipped with linkage segment (7) on joint piece (6), linkage segment (7) upper portion is equipped with female screw connector (8), two sets of lockholes (9) that the symmetry set up are seted up to linkage segment (7), install spring lock (10) with lockhole (9) looks adaptation on the opening inner wall, main drill bit (1) lower extreme is connected with two sets of cutting wings (2) that set up in opposite directions, cutting wing (2) lower extreme rigid coupling has multiunit main drilling tool bit (3), the opening has been seted up to the middle part of main drill bit (1) lower extreme, joint groove (5) looks adaptation has been seted up to the opening, joint groove (5), the embedded auxiliary drill bit (4) that is equipped with female screw connector (8) that is equipped with.
2. The drill bit for coal mine gas extraction according to claim 1, characterized in that: and water injection holes (11) are symmetrically formed in two sides of the through opening of the main drill bit (1).
3. The drill bit for coal mine gas extraction according to claim 1, characterized in that: the lower end of the auxiliary drill bit (4) is connected with two groups of auxiliary drilling tool bits (12) which are arranged oppositely.
4. The drill bit for coal mine gas extraction according to claim 1, characterized in that: the spring lock (10) comprises a limiting cylinder (13), a spring (14) and an inclined bolt (15), the inclined bolt (15) is fixedly installed at the front end of the limiting cylinder (13), and the spring (14) is installed in the limiting cylinder (13).
5. The drill bit for coal mine gas extraction according to claim 1, characterized in that: still be provided with gas drainage pipe (16) in main drill bit (1), gas drainage pipe (16) bottom is equipped with external screw thread connector (17) with female connector (8) looks adaptation, and gas drainage pipe (16) lower extreme has seted up multiunit aspirating hole (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123044371.4U CN216894257U (en) | 2021-12-06 | 2021-12-06 | Drill bit for coal mine gas extraction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123044371.4U CN216894257U (en) | 2021-12-06 | 2021-12-06 | Drill bit for coal mine gas extraction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216894257U true CN216894257U (en) | 2022-07-05 |
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ID=82204734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123044371.4U Active CN216894257U (en) | 2021-12-06 | 2021-12-06 | Drill bit for coal mine gas extraction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216894257U (en) |
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2021
- 2021-12-06 CN CN202123044371.4U patent/CN216894257U/en active Active
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