CN201495997U - Air drilling double-wall drill rod - Google Patents
Air drilling double-wall drill rod Download PDFInfo
- Publication number
- CN201495997U CN201495997U CN2009202173739U CN200920217373U CN201495997U CN 201495997 U CN201495997 U CN 201495997U CN 2009202173739 U CN2009202173739 U CN 2009202173739U CN 200920217373 U CN200920217373 U CN 200920217373U CN 201495997 U CN201495997 U CN 201495997U
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- CN
- China
- Prior art keywords
- tube body
- inner pipe
- pipe body
- pipe joint
- outer tube
- 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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Abstract
The utility model discloses an air drilling double-wall drill rod which comprises an outer pipe body and an inner pipe body, wherein the upper end portion of the outer pipe body is provided with inner screw threads and an inner clamping station, the lower end portion of the outer pipe body is provided with outer screw threads which have the same nominal diameter, shape and thread pitch and length as the inner screw threads on the upper end portion, a pipe sleeve type inner pipe joint is fixed on the upper end portion of the inner pipe body, a ventilating plate which is matched with the inner diameter of the inner clamping station of the outer pipe body is fixed on the inner pipe body under the inner pipe joint, the outer diameter of the inner pipe joint is smaller than the inner diameter of the outer pipe body, the inner pipe body is suspended in the outer pipe body through the ventilating plate, the upper end surface of the inner pipe joint is level to the upper end surface of the outer pipe body, the lower end surface of the inner pipe body is inserted in the inner pipe joint of another inner pipe body and is butt-jointed with the upper end surface of another inner pipe body when the outer screw threads on the lower end portion of the outer pipe body are screwed into the threads of another outer pipe body, the outer circumference of the inner pipe body is sealed with the inner circumference of the inner pipe joint of another inner pipe body. The air drilling double-wall drill rod can be conveniently maintained.
Description
Technical field
The utility model relates to a kind of air drilling double-wall drill rod, the air drilling double-wall drill rod that especially a kind of interior tube body separates with outer tube body.
Background technology
At present, the air drilling double-wall drill rod of prior art, interior tube body and outer tube body are the integral type air drilling double-wall drill rod that is fixed together.The shortcoming one of this air drilling double-wall drill rod is a complex structure, the required precision height, and processing technology is loaded down with trivial details, and its fitting face need be heat-treated to improve abrasion resistance, manufacturing cost height; The 2nd, bearing pressure is lower, generally has only several kilograms; Three are to use the life-span short, and maintenance difficult can't be keeped in repair at the construction field (site), only could keep in repair in the maintenance producer of specialty.The direct result of above various shortcoming delays the duration exactly, the construction cost height.Therefore, designing that a kind of bearing pressure is big, simple in structure, low cost of manufacture, long service life, easy to maintenance, air drilling double-wall drill rod that construction cost is low, is the present technical issues that need to address.
Summary of the invention
Technical problem to be solved in the utility model provides that a kind of bearing pressure is big, simple in structure, low cost of manufacture, long service life, easy to maintenance, air drilling double-wall drill rod that construction cost is low.
The technical scheme in the invention for solving the technical problem is:
A kind of air drilling double-wall drill rod, form by outer tube body and interior tube body, the upper end of outer tube body is processed with internal thread and Nei Katai, the bottom of outer tube body is processed with the internal thread nominal diameter with the upper end, tooth form is identical with pitch, the external screw thread that reach is suitable, be fixed with pipe box formula inner pipe joint in the upper end of interior tube body, on the interior tube body of the bottom of inner pipe joint, be fixed with air permeable disc with the internal diameter coupling of the Nei Katai of outer tube body, the external diameter of inner pipe joint is less than the internal diameter of outer tube body, interior tube body is suspended in the outer tube body by its air permeable disc, the upper surface of inner pipe joint is concordant with the upper surface of outer tube body, the lower surface of interior tube body enters when another root outer tube body internal thread of external screw thread precession of outer tube body bottom in the inner pipe joint of another root interior tube body and with the gap, upper surface of another root interior tube body and docks, the inner peripheral surface sealing of the inner pipe joint of the outer peripheral face of interior tube body and another root interior tube body.
The technical scheme in the invention for solving the technical problem can also be:
The internal thread of outer tube body described in the utility model upper end and the external screw thread of body bottom are taper thread.
Pipe box formula inner pipe joint described in the utility model is at the internal diameter of the upper surface part that the is higher than interior tube body external diameter greater than interior tube body, in inner pipe joint, be provided with lining and rubber ring, the external diameter of lining and rubber ring and the internal diameter of inner pipe joint coupling, the external diameter coupling of the internal diameter of lining and rubber ring and another root interior tube body.
Lining described in the utility model is three of upper, middle and lower, and described rubber ring is two that are embedded in the middle of the adjacent in twos lining.
The beneficial effects of the utility model are;
Compared with prior art, big, simple in structure, the low cost of manufacture of the utility model bearing pressure, long service life, easy to maintenance, construction cost is low.
Description of drawings
Fig. 1 is structural representation of the present utility model (two connection status).
Fig. 2 is an I portion enlarged drawing among Fig. 1.
The specific embodiment
As shown in the figure, a kind of air drilling double-wall drill rod, form by outer tube body 1 and interior tube body 2, the upper end of outer tube body 1 is processed with internal thread and Nei Katai, the bottom of outer tube body 1 is processed with the internal thread nominal diameter with the upper end, tooth form is identical with pitch, the external screw thread that reach is suitable, be fixed with pipe box formula inner pipe joint 4 in the upper end of interior tube body 2, on the interior tube body of the bottom of inner pipe joint 4, be fixed with air permeable disc 3 with the internal diameter coupling of the Nei Katai of outer tube body 1, the external diameter of inner pipe joint 4 is less than the internal diameter of outer tube body 1, interior tube body 2 is suspended in the outer tube body 1 by its air permeable disc 3, the upper surface of inner pipe joint 4 is concordant with the upper surface of outer tube body 1, the lower surface of interior tube body 2 enters when another root outer tube body 1 internal thread of external screw thread precession of outer tube body 1 bottom in the inner pipe joint 4 of another root interior tube body 2 and with the gap, upper surface of another root interior tube body 2 and docks, the inner peripheral surface sealing of the inner pipe joint 4 of the outer peripheral face of interior tube body 2 and another root interior tube body 2.The internal thread of described outer tube body 1 upper end and the external screw thread of body 1 bottom are taper thread.Described pipe box formula inner pipe joint 4 is at the internal diameter of the upper surface part that is higher than interior tube body 2 external diameter greater than interior tube body 2, in inner pipe joint 4, be provided with lining 5 and rubber ring 6, the internal diameter coupling of the external diameter of lining 5 and rubber ring 6 and inner pipe joint 4, the internal diameter of lining 5 and rubber ring 6 and the external diameter of another root interior tube body 2 coupling.Described lining 5 is three of upper, middle and lower, and described rubber ring 6 is for being embedded in two in the middle of the adjacent in twos lining 5.
Claims (4)
1. air drilling double-wall drill rod, form by outer tube body (1) and interior tube body (2), it is characterized in that: the upper end of outer tube body (1) is processed with internal thread and Nei Katai, the bottom of outer tube body (1) is processed with the internal thread nominal diameter with the upper end, tooth form is identical with pitch, the external screw thread that reach is suitable, be fixed with pipe box formula inner pipe joint (4) in the upper end of interior tube body (2), on the bottom interior tube body of inner pipe joint (4), be fixed with air permeable disc (3) with the internal diameter coupling of the Nei Katai of outer tube body (1), the external diameter of inner pipe joint (4) is less than the internal diameter of outer tube body (1), interior tube body (2) is suspended in the outer tube body (1) by its air permeable disc (3), the upper surface of inner pipe joint (4) is concordant with the upper surface of outer tube body (1), the lower surface of interior tube body (2) enters when another root outer tube body (1) internal thread of external screw thread precession of outer tube body (1) bottom in the inner pipe joint (4) of another root interior tube body (2) and with the gap, upper surface of another root interior tube body (2) and docks, the inner peripheral surface sealing of the inner pipe joint (4) of the outer peripheral face of interior tube body (2) and another root interior tube body (2).
2. a kind of air drilling double-wall drill rod according to claim 1 is characterized in that: the external screw thread of the internal thread of described outer tube body (1) upper end and body (1) bottom is a taper thread.
3. a kind of air drilling double-wall drill rod according to claim 1 and 2, it is characterized in that: described pipe box formula inner pipe joint (4) is at the internal diameter of the upper surface part that is higher than interior tube body (2) external diameter greater than interior tube body (2), in inner pipe joint (4), be provided with lining (5) and rubber ring (6), the internal diameter coupling of the external diameter of lining (5) and rubber ring (6) and inner pipe joint (4), the internal diameter of lining (5) and rubber ring (6) and the external diameter of another root interior tube body (2) coupling.
4. a kind of air drilling double-wall drill rod according to claim 3 is characterized in that: described lining (5) is three of upper, middle and lower, and described rubber ring (6) is for being embedded in two in the middle of the adjacent in twos lining (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202173739U CN201495997U (en) | 2009-09-26 | 2009-09-26 | Air drilling double-wall drill rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202173739U CN201495997U (en) | 2009-09-26 | 2009-09-26 | Air drilling double-wall drill rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201495997U true CN201495997U (en) | 2010-06-02 |
Family
ID=42439205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202173739U Expired - Fee Related CN201495997U (en) | 2009-09-26 | 2009-09-26 | Air drilling double-wall drill rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201495997U (en) |
-
2009
- 2009-09-26 CN CN2009202173739U patent/CN201495997U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100602 Termination date: 20130926 |