CN204200077U - A kind of down-the-hole air hammer - Google Patents
A kind of down-the-hole air hammer Download PDFInfo
- Publication number
- CN204200077U CN204200077U CN201420668211.8U CN201420668211U CN204200077U CN 204200077 U CN204200077 U CN 204200077U CN 201420668211 U CN201420668211 U CN 201420668211U CN 204200077 U CN204200077 U CN 204200077U
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- CN
- China
- Prior art keywords
- arc block
- hard
- metal insert
- air hammer
- hole air
- 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
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- Earth Drilling (AREA)
Abstract
A kind of down-the-hole air hammer, comprise joint and card drill sleeve, described joint and card drill sleeve are welded with and creep into guiding device, the described guiding device that creeps into is made up of equally distributed arc block, described arc block is inlaid with hard-metal insert or heap is welded with cemented carbide powder, in described arc block, arc dia is identical with impactor external diameter, and entire outer diameter is less than outside diameter.The utility model structure is simple, and low cost of manufacture, utilizes the utility model to carry out rock drilling operation and can effectively avoid occurring Drilling direction offset problem.
Description
Technical field
The utility model relates to a kind of down-the-hole air hammer.
Background technology
Existing down-the-hole air hammer is when drill process, and mostly utilize steady bar short circuit head to connect impactor and drilling rod, embedded alloy tooth on short circuit head, integral diameter is slightly less than bit diameter, thus plays the vertical effect in control impactor Drilling direction, ensures that pore-forming is regular.But when practical operation, lack stabilising arrangement because impactor breaks rock end, still easily occur the problems such as Drilling direction skew.
Utility model content
The technical problem of the utility model solution used is, provides a kind of down-the-hole air hammer effectively avoiding occurring Drilling direction offset problem.
The utility model solves the technical scheme that its technical problem adopts: a kind of down-the-hole air hammer, comprise joint and card drill sleeve, described joint and card drill sleeve are welded with and creep into guiding device, the described guiding device that creeps into is made up of equally distributed arc block, described arc block is inlaid with hard-metal insert or heap is welded with cemented carbide powder, in described arc block, arc dia is identical with impactor external diameter, and entire outer diameter is less than outside diameter.
Further, described hard-metal insert is hemi-spherical ended shape insert, plays shape tooth or parabola shaped tooth, and when inlaying, hard-metal insert exceeds arc block external surface.
Further, described hard-metal insert is tack tooth, and when inlaying, hard-metal insert and arc block external surface maintain an equal level.
Further, described arc block is 3-5 block.
When impactor carries out rock drilling operation, if the deviation proportion of boring is greater than design load, creeping into guiding device will contact with hole wall, correct for borehole deviation proportion.
The utility model structure is simple, and low cost of manufacture, effectively can ensure hole quality.
Accompanying drawing explanation
Fig. 1 is the front view of the utility model embodiment;
Fig. 2 is left view embodiment illustrated in fig. 1;
Fig. 3 is top view embodiment illustrated in fig. 1;
In figure: 1, hard-metal insert, 2, arc block, 3, joint, 4, card drill sleeve.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Embodiment 1
With reference to accompanying drawing, the present embodiment comprises joint 3 and card drill sleeve 4, described joint 3 and card drill sleeve 4 are welded with and creep into guiding device, the described guiding device that creeps into is made up of 3 pieces of equally distributed arc blocks 2, described arc block 2 is inlaid with hard-metal insert 1, in described arc block 2, arc dia is identical with impactor external diameter, and entire outer diameter is less than outside diameter.
Described hard-metal insert 1 is hemi-spherical ended shape insert, and certainly, also can be and play shape tooth or parabola shaped tooth etc., when inlaying, hard-metal insert exceeds arc block external surface.
Certainly, described hard-metal insert 1 also can be tack tooth, and when inlaying, hard-metal insert and arc block external surface maintain an equal level.
In the present embodiment, impactor exterior part is joint, outer shell (middle Circular Pipe), card drill sleeve, and the external diameter of three parts is identical, is impactor external diameter.
In the present embodiment, after entire outer diameter finger head welds with card drill sleeve and creeps into guiding device, the largest contours that hard-metal insert on equally distributed arc block is formed, is less than drill bit pore-forming external diameter, otherwise the impactor that guiding device is crept in welding cannot in access aperture.
Drill bit does not belong to a part for impactor, and impactor needs to coordinate drill bit to work together, and drill bit is connected with right side card drill sleeve.
Bit diameter is greater than impactor external diameter, and during work, pore-forming aperture is also greater than impactor external diameter, therefore may produce the deflection of impactor.By the utility model, can when not obvious affect deslagging, increase contact area and the quantity of impactor and pore-forming hole wall, guarantee impactor deviation proportion meets designing requirement.
Embodiment 2
The difference of the present embodiment and embodiment 1 is: described arc block 2 is piled and is welded with cemented carbide powder.
Claims (4)
1. a down-the-hole air hammer, comprise joint and card drill sleeve, it is characterized in that: described joint and card drill sleeve are welded with and creep into guiding device, the described guiding device that creeps into is made up of equally distributed arc block, described arc block is inlaid with hard-metal insert or heap is welded with cemented carbide powder, in described arc block, arc dia is identical with impactor external diameter, and entire outer diameter is less than outside diameter.
2. down-the-hole air hammer according to claim 1, is characterized in that: described hard-metal insert is hemi-spherical ended shape insert, plays shape tooth or parabola shaped tooth, and when inlaying, hard-metal insert exceeds arc block external surface.
3. down-the-hole air hammer according to claim 1, is characterized in that: described hard-metal insert is tack tooth, and when inlaying, hard-metal insert and arc block external surface maintain an equal level.
4. the down-the-hole air hammer according to claim 1 or 2 or 3, is characterized in that: described arc block is 3-5 block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420668211.8U CN204200077U (en) | 2014-11-11 | 2014-11-11 | A kind of down-the-hole air hammer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420668211.8U CN204200077U (en) | 2014-11-11 | 2014-11-11 | A kind of down-the-hole air hammer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204200077U true CN204200077U (en) | 2015-03-11 |
Family
ID=52658046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420668211.8U Expired - Fee Related CN204200077U (en) | 2014-11-11 | 2014-11-11 | A kind of down-the-hole air hammer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204200077U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109209221A (en) * | 2018-11-14 | 2019-01-15 | 中国铁建重工集团有限公司 | A kind of down-hole hammer equipment and its impact guidance system |
-
2014
- 2014-11-11 CN CN201420668211.8U patent/CN204200077U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109209221A (en) * | 2018-11-14 | 2019-01-15 | 中国铁建重工集团有限公司 | A kind of down-hole hammer equipment and its impact guidance system |
| CN109209221B (en) * | 2018-11-14 | 2024-02-09 | 中国铁建重工集团股份有限公司 | Down-the-hole hammer equipment and impact guiding system thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150311 Termination date: 20151111 |
|
| EXPY | Termination of patent right or utility model |