CN202266194U - Hole-expanding drill bit - Google Patents
Hole-expanding drill bit Download PDFInfo
- Publication number
- CN202266194U CN202266194U CN2011203843345U CN201120384334U CN202266194U CN 202266194 U CN202266194 U CN 202266194U CN 2011203843345 U CN2011203843345 U CN 2011203843345U CN 201120384334 U CN201120384334 U CN 201120384334U CN 202266194 U CN202266194 U CN 202266194U
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- CN
- China
- Prior art keywords
- hole
- drill bit
- reaming
- bit
- reaming bit
- 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 provides a hole-expanding drill bit. The hole-expanding drill bit is in a tubular shape; one end of the hole-expanding drill bit is provided with a drill rod joint; the other end of the hole-expanding bit is provided with a groove along the length direction; a first through hole is formed in the hole-expanding drill bit along the radial direction and vertical to a plane where the groove is positioned; two centrally symmetric drill bit blades are accommodated in the groove; a second through hole is formed in each drill bit blade; and the two drill bit blades are connected with each other through a rolling bearing arranged on the first through hole and the second through holes. The hole-expanding drill bit is simple in structure and easy to maintain, and an expanded hole is accurately positioned.
Description
Technical field
The utility model relates to a kind of mechanical hole reaming device that is used for the rock-soil layer reaming, particularly a kind of anchor (bar) rope reaming bit.
Background technology
Various types of anchor pole technology are widely used, and the anchoring body of most Engineering anchor rods is cylindrical and diameter is less, make confirming that the raising of anchor pole bearing capacity depends primarily on anchorage length under the formation condition, and the anti-pulling capacity raising of anchor pole is restricted.In order to improve the bearing capacity of anchor pole, wash away ground in the bottom of bolthole with water under high pressure, or use the blasting method expansion space; So that strengthen the volume of bolthole, thereby enlarge the contact surface of anchor pole and ground, can improve the uplift resistance of anchor pole; But water jet reaming out-of-shape, and make the weakening strength of ground own, mechanics parameter descends; The explosion reaming is random big, and it is loaded down with trivial details to construct.
Application number is 89210660.3 utility model patent, utilizes hinged four limbs umbrella bearizing mechanism to realize the reaming purpose, but owing to used more hinged and umbrella strut, stressed complicacy is difficult to shorter than hard formation use and application life.
Application number is that 200510115919.6 Chinese invention patent discloses " construction method for mechanical hole reaming of anchor rod "; Introduced a kind of mechanical hole reaming device; Comprise the central tube of slip suit and hollow central axis; Wherein be connected in series a secondary reamer at least in the upper end of central tube; Secondary reamer comprises the central tube of slip suit and hollow central axis; To pass through engaging lug hinged with central tube upper end and central axis lower end respectively for the two ends of the telescopic arm formed for three being hinged by long-armed and galianconism of evenly settling, and between the central axis of the central tube of end reamer and the secondary reamer on it, and passes through the coaxial fixed connection of tube connector between the central axis of the central tube of each secondary reamer and the secondary reamer on it.Though this reamer can be realized the purpose of mechanical hole reaming; But owing to used more hinged and umbrella strut, make the stressed complicacy of reamer, receive bigger restriction in the stratum of its use and application life; Work progress is also comparatively loaded down with trivial details, is difficult to promote with drill bit safeguard.
The utility model patent of ZL97221000.8 " Anchor rod base-enlarging drill bit ", its characteristic use rack and pinion mechanism and torsion pass cover can open and shrink the expansion bed plate wing at any time at the bottom of the hole, make to expand the end and creep into once completion, and can realize at the bottom of the multistage expansion.This device can be realized the reaming requirement, but the reaming structure is still complicated, is difficult to promote and safeguard, also be restricted application life.
In view of this, provide a kind of simple in structure, safeguard easily, the reaming bit of reaming accurate positioning necessitates.
Summary of the invention
The goal of the invention of the utility model provide a kind of simple in structure, safeguard easily, the reaming bit of reaming accurate positioning.
To achieve these goals, a kind of reaming bit that the utility model provides, said reaming bit are tubulose; The first end of said reamer is provided with tool joint; The said reaming bit other end is provided with groove along its length, radially and perpendicular to plane, groove place is provided with first through hole along reaming bit, accommodates two centrosymmetric drill bit page or leaf sheets in the said groove; Said drill bit page or leaf sheet is provided with second through hole, and said two drill bit page or leaf sheets are connected through the rolling bearing of being located at first through hole and second through hole.
Preferably, described reaming bit is a seamless pipe.
Preferably, described tool joint is the gradual change type nipple.
Preferably, the operate portions of described drill bit page or leaf sheet is a wedge shape.
Preferably, the operate portions of described drill bit page or leaf sheet is provided with stepped convexity.
The reamer bit structure that the utility model provides is simple, maintenance is easy, the reaming accurate positioning, and fixed in shape can make the anchor pole bearing capacity improve greatly.
Description of drawings
The front elevation drawing of a kind of reaming bit that Fig. 1 provides for the utility model;
Fig. 2 is the lateral view of Fig. 1;
Fig. 3 does not install the lateral view of drill bit page or leaf sheet for Fig. 1 reaming bit;
Fig. 4 is the schematic perspective view of drill bit page or leaf sheet.
The specific embodiment
Specify the utility model below in conjunction with accompanying drawing, it is as the part of this manual, through embodiment the principle of the utility model is described, other aspects of the utility model, and characteristic and advantage thereof will become very clear through this detailed description.
Like Fig. 1,2,3, shown in 4; A kind of reaming bit 100; Said reaming bit 100 is a tubulose, and said reaming bit 100 1 ends are provided with gradual change type screw on tool joint 110, and said reaming bit 100 other ends are provided with groove 120 along its length; Radially and perpendicular to plane, groove 120 place be provided with first through hole 130 along reaming bit 100; Accommodate two centrosymmetric drill bit page or leaf sheets 140 in the said groove 120, said drill bit page or leaf sheet 140 is provided with second through hole 142, and said two drill bit page or leaf sheets 140 are connected through the rolling bearing 150 of being located at first through hole 130 and second through hole 142.
Preferably, the operate portions of described drill bit page or leaf sheet 140 is a wedge shape, and the operate portions of drill bit page or leaf sheet is provided with stepped protruding 144.
Its reaming operating principle of the utility model is following: earlier in rock-soil layer, form isodiametric boring with common drill bit, change the reaming bit of the utility model behind the reaming position again, in the time of at the bottom of drill bit does not contact hole, equal diameter hole; Two centrosymmetric drill bit page or leaf sheet freedom are superimposed; Reaming bit can be in the equal diameter hole moves up and down freely, when creeping into reaming bit propped up hole, equal diameter hole at the bottom of, this moment, drill bit page or leaf sheet inclined-plane received foot of hole rock soil medium vertical reaction; Drill bit page or leaf sheet struts work; Along with the pressure of drilling rod to reaming bit increases and the drill bit rotation, the drill bit page or leaf sheet of two symmetries opens to both sides, rotary cutting hole bed rock soil; Form the space that the aperture enlarges, guarantee that the reaming size reaches design load.
Fig. 1 is the front elevation drawing that drill bit page or leaf sheet opens 15 degree, and bottom two angle braces are opened, and reach duty, when drill bit creeps into; The part of the force all has the strong point to support, and is as shown in the figure, under when boring, because the A point is stressed; Drill bit struts work, and top rod constantly bores down, provides support power by the B point.Guarantee that the reaming size reaches design load.
The reamer bit structure that the utility model provides is simple, maintenance is easy, the reaming accurate positioning, and fixed in shape can make the anchor pole bearing capacity improve greatly.
The above preferred embodiment that is merely the utility model that discloses can not limit the interest field of the utility model certainly with this, so according to the equivalent variations that the utility model claim is done, still belong to the scope that the utility model is contained.
Claims (5)
1. reaming bit; It is characterized in that: said reaming bit is a tubulose, and the first end of said reamer is provided with tool joint, and the said reaming bit other end is provided with groove along its length; Radially and perpendicular to plane, groove place be provided with first through hole along reaming bit; Accommodate two centrosymmetric drill bit page or leaf sheets in the said groove, said drill bit page or leaf sheet is provided with second through hole, and said two drill bit page or leaf sheets are connected through the rolling bearing of being located at first through hole and second through hole.
2. reaming bit according to claim 1 is characterized in that: described reaming bit is a seamless pipe.
3. reaming bit according to claim 1 is characterized in that: described tool joint is the gradual change type nipple.
4. reaming bit according to claim 1 is characterized in that: the operate portions of described drill bit page or leaf sheet is a wedge shape.
5. reaming bit according to claim 4 is characterized in that: the operate portions of described drill bit page or leaf sheet is provided with stepped convexity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203843345U CN202266194U (en) | 2011-10-11 | 2011-10-11 | Hole-expanding drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203843345U CN202266194U (en) | 2011-10-11 | 2011-10-11 | Hole-expanding drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202266194U true CN202266194U (en) | 2012-06-06 |
Family
ID=46156992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203843345U Expired - Fee Related CN202266194U (en) | 2011-10-11 | 2011-10-11 | Hole-expanding drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202266194U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106903349A (en) * | 2017-04-27 | 2017-06-30 | 湖北武大珞珈工程结构检测咨询有限公司 | A kind of electric drill reaming bit |
-
2011
- 2011-10-11 CN CN2011203843345U patent/CN202266194U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106903349A (en) * | 2017-04-27 | 2017-06-30 | 湖北武大珞珈工程结构检测咨询有限公司 | A kind of electric drill reaming bit |
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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: 20120606 Termination date: 20141011 |
|
| EXPY | Termination of patent right or utility model |