CN213540269U - Down-the-hole drill bit - Google Patents
Down-the-hole drill bit Download PDFInfo
- Publication number
- CN213540269U CN213540269U CN202022737833.XU CN202022737833U CN213540269U CN 213540269 U CN213540269 U CN 213540269U CN 202022737833 U CN202022737833 U CN 202022737833U CN 213540269 U CN213540269 U CN 213540269U
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- CN
- China
- Prior art keywords
- drill bit
- hole
- bit part
- water channel
- working end
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 229910003460 diamond Inorganic materials 0.000 claims description 24
- 239000010432 diamond Substances 0.000 claims description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000000843 powder Substances 0.000 claims description 9
- 241001074085 Scophthalmus aquosus Species 0.000 claims 6
- 239000000203 mixture Substances 0.000 claims 1
- 229910045601 alloy Inorganic materials 0.000 abstract description 18
- 239000000956 alloy Substances 0.000 abstract description 18
- 239000011435 rock Substances 0.000 description 6
- 229910000851 Alloy steel Inorganic materials 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 208000035874 Excoriation Diseases 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
Images
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- Earth Drilling (AREA)
Abstract
The utility model discloses a down-the-hole drill bit, including drill bit portion, drillstock portion and alloy tooth, the alloy tooth sets up on the working end face of drill bit portion, the tail end of drill bit portion is equipped with the counter bore, the front end of drillstock portion matches and installs in the counter bore, the round pin is followed the drill bit portion is packed into and is matched and wear on drill bit portion and the drillstock portion. This application when the drill bit portion of drill bit takes place to damage or when wearing and tearing serious condition, need not to change whole drill bit, only need change the drill bit portion that corresponds can, greatly reduced use cost.
Description
Technical Field
The utility model relates to a down-the-hole drill bit especially relates to a down-the-hole drill bit.
Background
The down-the-hole drill bit is used as a matched product of a high-power rock drill and is mainly used in engineering tunneling construction of tunnels, underground mining, surface mines, quarries and the like, the down-the-hole drill bit crushes rocks in an impact or impact rotation mode, and the requirements on fracture resistance, fatigue fracture resistance, toughness and wear resistance of the down-the-hole drill bit are higher and higher in the working process. At present, the drill bit part and the drill shank part of the existing down-the-hole drill bit are integrally formed, and when the drill bit part is worn and cannot be used, the drill bit part and the drill shank part are required to be integrally scrapped, so that the use cost is undoubtedly increased.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at provides a down-the-hole drill bit, when the drill bit portion of drill bit takes place to damage or the serious condition of wearing and tearing, need not to change whole drill bit, only need change the corresponding drill bit portion can, greatly reduced use cost.
In order to solve the technical problem, the utility model adopts the following technical scheme:
the utility model provides a down-the-hole drill bit, includes drill bit portion and drillstock portion, mixed arrangement has carbide tooth and polycrystalline diamond compact on the working end face of drill bit portion, the carbide tooth is higher than polycrystalline diamond compact, the tail end of drill bit portion is equipped with the counter bore, the front end of drillstock portion matches and installs in the counter bore, the round pin is followed the drill bit portion is packed into and is matched and wear on drill bit portion and the drillstock portion.
Specifically, the working end face of the drill bit part is provided with a diamond-impregnated layer.
Specifically, a plug is installed in a threaded hole for installing the pin on the drill bit portion.
Specifically, a plurality of powder discharge grooves are arranged on the outer edge of the drill bit part at intervals.
Specifically, a through water channel is arranged in the drill shank portion, a plurality of inclined water channels are arranged in the drill head portion, the through water channel is communicated with the inclined water channels, and water outlets of the inclined water channels are located on the working end face.
Specifically, the working end face is provided with an inclined hole water channel, and the inclined hole water channel is communicated between the powder discharge groove and the water outlet.
Compared with the prior art, the utility model discloses the beneficial effect who has lies in: 1) the impact crushing mode and the rotary shearing crushing mode are organically combined, the advantages of the hard alloy teeth and the polycrystalline diamond compact are exerted, the rock breaking efficiency is improved, and the service life of the drill bit is prolonged; 2) the drill bit part and the drill handle part are connected through the pin, so that looseness of the drill bit part can be effectively prevented, the drill bit part can be prevented from falling off, when the drill bit part of the drill bit is damaged or seriously abraded, the pin is taken out by the pin puller, the drill bit part can be replaced, the use cost is greatly reduced, and the replacement of the drill bit part is very convenient.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural view of a down-the-hole drill bit according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a down-the-hole drill bit provided by an embodiment of the present invention;
FIG. 3 is a sectional view taken along line A-A of FIG. 2;
wherein: 1-a drill head; 2-a drill shank portion; 3-hard alloy teeth; 4-pin; 5-impregnated diamond layer; 6-plug; 7-powder discharge groove; 8-straight-through water channel; 9-inclined water passage; 10-inclined-hole water channel; 11-polycrystalline diamond compact.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1-3, a down-the-hole drill bit comprises a drill bit part 1 and a drill bit part 2, wherein hard alloy teeth 3 and a polycrystalline diamond compact 11 are arranged on the working end face of the drill bit part 1 in a mixed mode, the hard alloy teeth 3 are higher than the polycrystalline diamond compact 11, a counter bore is formed in the tail end of the drill bit part 1, the front end of the drill bit part 2 is installed in the counter bore in a matched mode, and a pin 4 is installed from the drill bit part 1 and penetrates through the drill bit part 1 and the drill bit part 2. Wherein, in order to ensure the reliability of the connection, two pins 4 are symmetrically arranged on two sides of the drill shank part 2.
In this embodiment, after drillstock portion 2 inserts the counter bore, connect through wearing round pin 4 on drillstock portion 1 and drillstock portion 2, thereby reach the purpose of firmly installing drillstock portion 1 on drillstock portion 2, not only can prevent effectively that drillstock portion 1 from becoming flexible and dropping, when the condition that the drillstock portion 1 of drill bit takes place to damage or wearing and tearing serious moreover, as long as take out round pin 4 with the pin puller, change drillstock portion 1 can, use cost has significantly reduced, it is very convenient to change drillstock portion 1 moreover. In addition, hard alloy tooth 3 and polycrystalline diamond compact 11 expose highly different, guarantee that hard alloy tooth at first contacts the stratum, uninstallation impact load and partial stress, avoid polycrystalline diamond compact rupture, form the impact crushing to the stratum simultaneously, make the inside damage and the crackle that form of rock, rethread polycrystalline diamond compact eats, the broken rock is cuted in the slip, to strike broken mode and rotatory broken mode of shearing and combine, combine hard alloy tooth and polycrystalline diamond compact's advantage, can to a great extent improve broken rock efficiency and drill bit life-span.
Wherein, the drill bit portion 1 can adopt alloy steel preparation, and carbide tooth 3 and polycrystalline diamond compact 11 are inlayed and are fixed on drill bit portion 1, and carbide tooth 3 can adopt the spherical tooth of carbide, and polycrystalline diamond compact 11 includes the carbide base member and sets up the polycrystalline diamond layer at the carbide base member top, and polycrystalline diamond compact 11's top also can set up into the spherical crown shape. The hard alloy teeth 3 and the polycrystalline diamond compacts 11 are alternately arranged in rows on the drill bit part 1, and the height difference between the hard alloy teeth 3 and the polycrystalline diamond compacts 11 is controlled to be 1-4 mm.
In some possible embodiments, the working end face of the drill bit portion 1 is provided with a diamond impregnated layer 5. The wear resistance of the drill bit part 1 is greatly improved in such a mode, when the drill bit works, the alloy teeth 3 cannot fall off from the ball tooth mounting holes due to the early abrasion of the working end face of the drill bit part 1, the service life of the drill bit is prolonged, and the drilling efficiency is improved. The alloy teeth 3 are fixed in the diamond-impregnated layer 5, the diamond-impregnated layer 5 can protect the alloy teeth 3 to the maximum extent, the alloy teeth 3 can be guaranteed to work under the normal abrasion condition as far as possible, the breaking phenomenon is reduced, and the service life and the footage can be effectively prolonged. Meanwhile, the diamond-impregnated layer 5 contains a large number of diamond particles, so that the ploughing effect is achieved, the diamond content of the drill bit is increased, and the footage and the service life of the drill bit are further improved.
In some possible embodiments, the drill bit portion 1 may be made of alloy steel, the diamond-impregnated layer 5 may be coated on the drill bit portion 1 made of alloy steel by electroplating, fused deposition or laser 3D printing, the diamond-impregnated layer 5 may be impregnated with natural diamond or thermally stable artificial polycrystalline diamond, and the matrix of the diamond-impregnated layer 5 may be made of FeCoCu alloy, CoCrMo alloy or NiW alloy.
In the actual design, in order to prevent the pin 4 from falling off and impurities from blocking the threaded hole at the tail of the pin 4, the plug 6 is mounted on the drill bit part 1, and the pin 4 is inserted into the hole of the pin 4 at the other side of the drill bit part 1 after being inserted from the outside of the drill bit part 1, wherein the pin 4 can be a cylindrical pin, and a pin body with other cross-sectional shapes can be adopted.
Referring to fig. 1-3, specifically, a plurality of powder discharge grooves 7 are arranged at intervals on the outer edge of the drill bit part 1, a straight-through water channel 8 is arranged inside the drill bit part 2, a plurality of inclined water channels 9 are arranged inside the drill bit part 1, the straight-through water channel 8 is communicated with the inclined water channels 9, and a water outlet of the inclined water channels 9 is located on the working end face. During the drilling process, the down-the-hole drill bit can crush the foundation pile into slag, and after high-pressure water flow is sprayed out from the water outlet along the straight water channel 8 and the inclined water channel 9, the slag is washed outwards to an orifice on the earth surface and discharged, so that the down-the-hole drill bit is ensured not to be in direct contact with the surface of the foundation pile, and the crushing efficiency is higher.
In practical application, the working end face of the drill bit part 1 is further provided with an inclined-hole water channel 10, and the inclined-hole water channel 10 is communicated between the corresponding powder discharge groove 7 and the water outlet. The inclined hole water channel 10 is designed to open the water outlet and the powder discharge groove 7, so that slag materials after foundation pile crushing can be quickly separated from the rotating range of the down-the-hole drill bit along the inclined hole water channel 10 and the powder discharge groove 7, and the crushing efficiency is higher.
The above examples are merely illustrative of the present invention clearly and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Nor is it intended to be exhaustive of all embodiments. And obvious changes and modifications may be made without departing from the scope of the present invention.
Claims (6)
1. A down-the-hole drill bit comprising a bit portion (1) and a shank portion (2), characterized in that: mix arrangement has carbide tooth (3) and polycrystalline diamond compact (11) on the working end face of brill head portion (1), carbide tooth (3) are higher than polycrystalline diamond compact (11), the tail end of brill head portion (1) is equipped with the counter bore, the front end of brill stalk portion (2) matches and installs in the counter bore, round pin (4) are followed brill head portion (1) is packed into and is matched and wear on brill head portion (1) and brill stalk portion (2).
2. The down-the-hole drill bit of claim 1, wherein: and a diamond-impregnated layer (5) is arranged on the working end surface of the drill bit part (1).
3. The down-the-hole drill bit of claim 1 or 2, wherein: and a plug (6) is arranged in a threaded hole for mounting the pin (4) on the drill bit part (1).
4. The down-the-hole drill bit of claim 1 or 2, wherein: a plurality of powder discharge grooves (7) are arranged on the outer edge of the drill bit part (1) at intervals.
5. The down-the-hole drill bit of claim 4, wherein: the drill bit is characterized in that a straight-through water channel (8) is arranged inside the drill bit part (2), a plurality of inclined water channels (9) are arranged in the drill bit part (1), the straight-through water channel (8) is communicated with the inclined water channels (9), and water outlets of the inclined water channels (9) are located on the working end face.
6. The down-the-hole drill bit of claim 5, wherein: the working end face is provided with an inclined hole water channel (10), and the inclined hole water channel (10) is communicated between the powder discharge groove (7) and the water outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022737833.XU CN213540269U (en) | 2020-11-23 | 2020-11-23 | Down-the-hole drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022737833.XU CN213540269U (en) | 2020-11-23 | 2020-11-23 | Down-the-hole drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213540269U true CN213540269U (en) | 2021-06-25 |
Family
ID=76483973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022737833.XU Expired - Fee Related CN213540269U (en) | 2020-11-23 | 2020-11-23 | Down-the-hole drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213540269U (en) |
-
2020
- 2020-11-23 CN CN202022737833.XU patent/CN213540269U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210625 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |