CN110424897A - Bottom expanding drill afterwards - Google Patents
Bottom expanding drill afterwards Download PDFInfo
- Publication number
- CN110424897A CN110424897A CN201910796714.0A CN201910796714A CN110424897A CN 110424897 A CN110424897 A CN 110424897A CN 201910796714 A CN201910796714 A CN 201910796714A CN 110424897 A CN110424897 A CN 110424897A
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- China
- Prior art keywords
- blade
- interconnecting piece
- bottom expanding
- expanding drill
- open slot
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
- E21B10/32—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
- E21B10/327—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools the cutter being pivoted about a longitudinal axis
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
- E21B10/43—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Earth Drilling (AREA)
Abstract
Bottom expanding drill after provided by the present application, including drilling rod, yoke frame, blade and connector.Drilling rod includes ontology and the mounting portion that connect with ontology, and open slot and first shaft hole are formed on mounting portion, has the guide surface being obliquely installed on mounting portion corresponding opening slot.Yoke frame includes interconnecting piece and the pedestal that connect with interconnecting piece, is formed with the second axis hole on interconnecting piece, interconnecting piece can move in open slot.Blade includes support end, blade and sliding end, and sliding end is arranged in open slot, and support end is towards interconnecting piece, and blade is towards on the outside of open slot.Connector passes through first shaft hole and the second axis hole, interconnecting piece is movably connected on mounting portion, wherein one in first shaft hole and the second axis hole is adapted with connector, another in first shaft hole and the second axis hole is along the axially extending of drilling rod.Bottom expanding drill after provided by the embodiments of the present application, structure is simple, and convenient for production, low manufacture cost, operating method is simple.
Description
Technical field
This application involves Geotechnical Engineering field more particularly to a kind of rear bottom expanding drills.
Background technique
Post-anchoring technology refers to has beaten straight hole on concrete substrate, then with bottom expanding drill after dedicated the bottom of straight hole into
Row reaming, the type chamber that reaming is formed is consistent with the geometry after the expansion of rear reaming anchor bolt head, the expansion of rear reaming anchor bolt head
After opening and type chamber is fitted close to form mechanical locking mechanism.It is existing after bottom expanding drill using the kind of drive of gear, rack gear come
The expansion and contraction of the blade of bottom expanding drill after realization, structure is complicated for the rear bottom expanding drill of this form.
Summary of the invention
In view of this, the embodiment of the present application is intended to provide a kind of rear bottom expanding drill, solves existing rear bottom expanding drill and use
Gear, rack gear the kind of drive come the expansion and contraction of the blade of bottom expanding drill after realizing, the problem of structure is complicated, on solving
Technical problem is stated, the technical solution of the embodiment of the present application is achieved in that
The embodiment of the present application provides a kind of rear bottom expanding drill, comprising:
Drilling rod, the drilling rod include ontology and the mounting portion that connect with the ontology, are formed with opening on the mounting portion
Slot and first shaft hole, the mounting portion, which corresponds to, has the guide surface being obliquely installed on the open slot；
Yoke frame, the yoke frame include interconnecting piece and the pedestal that connect with the interconnecting piece, are formed on the interconnecting piece
There is the second axis hole, the interconnecting piece can move in the open slot；
Blade, the blade include support end, blade and sliding end, and the sliding end is arranged in the open slot, institute
Support end is stated towards the interconnecting piece, the blade is towards on the outside of the open slot；And
Connector, the connector pass through the first shaft hole and second axis hole, and the interconnecting piece activity is connected
It connects on the mounting portion, wherein one in the first shaft hole and second axis hole is adapted with the connector, institute
Another in first shaft hole and second axis hole is stated along the axially extending of the drilling rod；
When the drilling rod moves and the base motions are by limited time towards the yoke frame, the interconnecting piece abuts the branch
End is supportted, the direction for making the sliding end face away from the yoke frame along the guiding moves, and the blade is exposed to the brill
On the outside of bar；When the drilling rod is moved away from the yoke frame, the sliding end can be along the guide surface towards close to the pushing tow
The direction of part moves, and is accommodated in the blade in the open slot.
Further, the guide surface is on the axis that one end of the yoke frame is located at the ontology, the blade
It is located on the axis of the ontology towards one end of the ontology.
Further, the mounting portion include sliding part, the limiting section that is connect with the sliding part, shape on the limiting section
At the open slot, the guide surface is formed on the sliding part, and the outer surface of the limiting section is at least partly lower than described
The outer surface of ontology, to form solid-holding slot.
Further, the thickness of the limiting section towards the rear bottom expanding drill direction of travel side is carried on the back less than the limiting section
Thickness from the rear bottom expanding drill direction of travel side.
Further, the rear bottom expanding drill includes being set to the body outer surface and leading with what the solid-holding slot was connected to
Slag chute, the slag guiding trough are axially extending along the ontology.
Further, the sliding end can be moved to along the direction non-parallel to the guide surface in the open slot with
The guide surface abuts.
Further, the area of end face of the pedestal far from the interconnecting piece is greater than the interconnecting piece and the pedestal connects
The area of the end face connect.
Further, the pedestal passes through polishing treatment far from the end face of the interconnecting piece；
And/or end face of the pedestal far from the interconnecting piece is spherical surface.
Further, the blade includes the first cutting face and the second cutting face for connecting with first cutting face, institute
The first cutting face is stated towards the rear bottom expanding drill direction of travel, second cutting face is away from the rear bottom expanding drill traveling side
To the area in first cutting face is greater than the area in second cutting face.
Further, the quantity at least two of the open slot, the otch are circumferentially-spaced along the mounting portion
It is uniformly distributed, the quantity of the blade is equal with the quantity of the open slot.
Bottom expanding drill after provided by the embodiments of the present application, connector passes through first shaft hole and the second axis hole, by interconnecting piece
It is movably connected on mounting portion, sliding end is moved along guide surface towards the direction close to or far from yoke frame, realize knife
Sword is exposed on the outside of drilling rod or is accommodated in open slot, thus realize the purpose of reaming, rear base expanding and base expanding provided by the embodiments of the present application
Drill bit structure is simple, and convenient for production, low manufacture cost, operating method is simple.
Detailed description of the invention
Fig. 1 is a structural schematic diagram of rear bottom expanding drill in the embodiment of the present application, wherein blade is accommodated in open slot
It is interior；
Fig. 2 is the cross-sectional view in the direction A-A in Fig. 1；
Fig. 3 is another structural schematic diagram of rear bottom expanding drill in the embodiment of the present application, wherein blade is exposed to outside drilling rod
Side；
Fig. 4 is the cross-sectional view in the direction B-B in Fig. 3；
Fig. 5 is the cross-sectional view in the direction C-C in Fig. 4；
Fig. 6 is the structural schematic diagram of drilling rod in the embodiment of the present application；
Fig. 7 is the cross-sectional view in the direction D-D in Fig. 6；
Fig. 8 is the main view of yoke frame in the embodiment of the present application；
Fig. 9 is the side view of yoke frame in Fig. 8；
Figure 10 is the section view in the direction E-E in Fig. 8；
Figure 11 is the main view of blade in the embodiment of the present application；
Figure 12 is the top view of blade in Figure 11；
Figure 13 is the structural schematic diagram of straight hole in the embodiment of the present application；
Figure 14 is rear bottom expanding drill cross-sectional view in straight hole in the embodiment of the present application；
Figure 15 is the cross-sectional view in the embodiment of the present application after rear bottom expanding drill reaming；
Figure 16 is the structural schematic diagram in the embodiment of the present application after straight hole reaming.
Description of symbols
Drilling rod 1；Ontology 11；Mounting portion 12；Open slot 12a；First shaft hole 12b；Guide surface 12c；Solid-holding slot 12d；Sliding
Portion 121；Limiting section 122；Yoke frame 2；Interconnecting piece 21；Second axis hole 21a；Pedestal 22；Blade 3；Support end 3a；Blade 3b；The
One cutting face 3b '；Second cutting face 3b "；Sliding end 3c；Connector 4；Straight hole 100；Type chamber 200.
Specific embodiment
It should be noted that in the absence of conflict, the technical characteristic in embodiment and embodiment in the application can
To be combined with each other, the detailed description in specific embodiment is interpreted as the explanation of the application objective, is not construed as to this
The improper restriction of application.
In the description of the present application, when "upper", "lower" orientation or positional relationship are based on rear bottom expanding drill normal use
Orientation.It is to be appreciated that these directional terminologies are merely for convenience of description the application and simplify description, rather than instruction or dark
Show that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as pair
The limitation of the application.
- Fig. 6 referring to Figure 1, the embodiment of the present application provide a kind of rear bottom expanding drill, including drilling rod 1, yoke frame 2, blade 3
And connector 4.Drilling rod 1 includes ontology 11 and the mounting portion 12 connecting with ontology 11, is formed with open slot 12a on mounting portion 12
With first shaft hole 12b, there is the guide surface 12c being obliquely installed on 12 corresponding opening slot 12a of mounting portion.Yoke frame 2 includes connection
Portion 21 and the pedestal 22 connecting with interconnecting piece 21 are formed with the second axis hole 21a on interconnecting piece 21, and interconnecting piece 21 can be in open slot
It is moved in 12a.Blade 3 includes support end 3a, blade 3b and sliding end 3c, and sliding end 3c is arranged in open slot 12a, support end
3a is towards interconnecting piece 21, and blade 3b is towards on the outside of open slot 12a.Connector 4 passes through first shaft hole 12b and the second axis hole 21a, with
Interconnecting piece 21 is movably connected on mounting portion 12, wherein one in first shaft hole 12b and the second axis hole 21a and connector 4
It is adapted, another in first shaft hole 12b and the second axis hole 21a is along the axially extending of drilling rod 1.
When drilling rod 1 is towards when the movement of yoke frame 2 and 22 limitation of movement of pedestal, interconnecting piece 21 abuts support end 3a, makes to slide
End 3c is moved along guide surface 12c towards the direction far from yoke frame 2, and blade 3b is exposed to 1 outside of drilling rod.When drilling rod 1 deviates from pushing tow
Part 2 moves, and sliding end 3c can be moved along guide surface 12c towards the direction close to yoke frame 2, and blade 3b is made to be accommodated in open slot
In 12a.At this point, blade 3 is accommodated in open slot 12a.
In one embodiment of the application, first shaft hole 12b is adapted with connector 4, axial direction of the second axis hole 21a along drilling rod 1
Extend.Using such design, the intensity of drilling rod 1 is more preferable, and stress-bearing capability is more preferable.Connector 4 passes through first shaft hole 12b and the second axis
Hole 21a, since first shaft hole 12b is adapted with connector 4, and because the second axis hole 21a is connected along the axially extending of drilling rod 1
Part 4 is axially extending length of the second axis hole 21a along drilling rod 1 along the distance that drilling rod 1 is axially moved, to realize interconnecting piece 21
It is flexibly connected with mounting portion 12, interconnecting piece 21 can move in open slot 12a.
When drilling rod 1 is moved towards yoke frame 2, connector 4 is also moved towards yoke frame 2, and mounting portion 12 is also towards pushing tow
Part 2 moves, under conditions of 22 limitation of movement of pedestal, since interconnecting piece 21 abuts support end 3a, so that the edge sliding end 3c be made to lead
It is moved to face 12c towards the direction far from yoke frame 2, blade 3b is exposed to 1 outside of drilling rod, and blade 3b touches straight hole 100 (see figure
13) hole wall.When 1 stop motion of drilling rod, blade 3b is exposed to 1 outside of drilling rod to greatest extent.At this point, rotary drill rod 1 carries out
Reaming, the type chamber 200 that reaming is formed are consistent with the geometry after the expansion of rear reaming anchor bolt head.After the completion of reaming, Xiang Zhikong
100 top lifts drilling rod 1, i.e., drilling rod 1 is moved away from yoke frame 2, and connector 4 is also moved away from yoke frame 2, blade 3 from
Under the action of the hole wall of body gravity and/or straight hole 100, sliding end 3c is moved along guide surface 12c towards the direction close to yoke frame 2,
It is accommodated in blade 3b in open slot 12a, rear bottom expanding drill takes out out of straight hole 100.
In one embodiment of the application, the second axis hole 21a is adapted with connector 4, axial direction of the first shaft hole 12b along drilling rod 1
Extending, connector 4 passes through first shaft hole 12b and the second axis hole 21a, since the second axis hole 21a is adapted with connector 4, and because
It is first shaft hole 12b along the axially extending of drilling rod 1, connector 4 is first shaft hole 12b along brill along the distance that drilling rod 1 is axially moved
The axially extending length of bar 1, to realize that interconnecting piece 21 is flexibly connected with mounting portion 12, interconnecting piece 21 can be in open slot
It is moved in 12a.Drilling rod 1, yoke frame 2, blade 3, the motion principle of connector 4 are identical as above-mentioned principle, and details are not described herein.
Connector 4 passes through first shaft hole 12b and the second axis hole 21a, and interconnecting piece 21 is movably connected on mounting portion 12,
Sliding end 3c is moved along guide surface 12c towards the direction close to or far from yoke frame 2, realizes that blade 3b is exposed to drilling rod
1 outside is accommodated in open slot 12a, thus realize the purpose of reaming, rear bottom expanding drill structure provided by the embodiments of the present application
Simply, it is convenient for making, low manufacture cost, operating method is simple.
The cross section of connector 4 radially can for polygon, such as triangle, quadrangle, pentagon or hexagon etc.,
Or circle.It is understood that when the cross section of connector 4 radially is polygon, first shaft hole 12b and second
One in axis hole 21a is adapted with connector 4, it is, one in first shaft hole 12b and the second axis hole 21a is along diameter
To cross section be polygon compatible with connector 4, another in first shaft hole 12b and the second axis hole 21a is along drilling rod 1
It is axially extending, that is to say, that in first shaft hole 12b and the second axis hole 21a another be along drilling rod 1 axially extending length
Strip-shaped hole enables connector 4 to move in another in first shaft hole 12b and the second axis hole 21a.
When the cross section of connector 4 radially is round, one in first shaft hole 12b and the second axis hole 21a with connect
Part 4 is adapted, that is to say, that one in first shaft hole 12b and the second axis hole 21a is that cross section radially is and connector
4 compatible circles, it is preferable that in first shaft hole 12b and the second axis hole 21a the other is cross section radially is along brill
The axially extending kidney slot of bar 1, adopts the structure, gap, connector 4 and second between connector 4 and first shaft hole 12b
Gap is not easy to accumulate dust or bits between axis hole 21a, so that dust or bits be avoided to influence the movement of connector 4.
It is understood that since drilling rod 1, yoke frame 2, blade 3 and connector 4 are both needed to enter straight hole 100, then to straight
Hole 100 carries out reaming and in the case where blade 3b is accommodated in open slot 12a, rear bottom expanding drill is therefore put into straight hole 100
Interior, the maximum gauge of drilling rod 1, yoke frame 2 and connector 4 is certainly less than the diameter for being equal to straight hole 100.
In one embodiment of the application, Fig. 2 and Fig. 4 are referred to, guide surface 12c is located at ontology 11 close to one end of yoke frame 2
Axis on, blade 3 is located on the axis of ontology 11 towards one end of ontology 11.Since blade 3b can be accommodated in open slot
In 12a, guide surface 12c is on the axis that one end of yoke frame 2 is located at ontology 11, so that sliding end 3c is close to yoke frame 2
One end can be located on the axis of ontology 11, in addition, blade 3 is located on the axis of ontology 11 towards one end of ontology 11, so that
Blade 3 is interior in a limited space, can have biggish contact area with mounting portion 12, to increase the structural strength of blade 3, change
The force-bearing situation of kind blade 3.
In one embodiment of the application ,-Fig. 5, mounting portion 12 are connect including sliding part 121, with sliding part 121 referring to Figure 1
Limiting section 122, open slot 12a is formed on limiting section 122, guide surface 12c is formed on sliding part 121, limiting section 122 it is outer
Surface is at least partly lower than the outer surface of ontology 11, to form solid-holding slot 12d.Bits can be generated during due to reaming, adopted
With solid-holding slot 12d convenient for accommodating bits, solid-holding slot 12d is set on limiting section 122, and structure is simple, production easy to process.
In one embodiment of the application, Fig. 5 is referred to, the thickness of limiting section 122 towards rear bottom expanding drill direction of travel side is small
Deviate from the thickness of rear bottom expanding drill direction of travel side in limiting section 122.Since limiting section 122 is towards rear bottom expanding drill direction of travel
The thickness of side is smaller, during rear bottom expanding drill carries out rotation reaming, enters in solid-holding slot 12d convenient for bits；Limiting section
122 thickness away from rear bottom expanding drill direction of travel side is relatively large, plays the role of that bits is stopped to fly out, avoids solid-holding slot
Bits in 12d move to outside solid-holding slot 12d with rotation reaming.
The axial direction in the tilt angle of adjusting blade 3b, first shaft hole 12b or the second axis hole 21a along drilling rod 1 can be passed through
The length of extension, to adjust the size that blade 3b is exposed to outside drilling rod 1, thus the size of change type chamber 200.
In one embodiment of the application, refer to Fig. 6 and Fig. 7, rear bottom expanding drill include be set to 11 outer surface of ontology and with
The slag guiding trough (not shown go out) of solid-holding slot 12d connection, slag guiding trough is axially extending along ontology 11.Slag guiding trough is used for solid-holding slot
Bits guidance discharge straight hole 100 in 12d.It is larger in 200 volume of type chamber, when solid-holding slot 12d volume is inadequate, incited somebody to action by slag guiding trough
More bits guidance discharge straight holes 100.
It is understood that slag guiding trough can be one, or it is multiple, it can be linear structure, be also possible to
Helical structure.
In one embodiment of the application ,-Fig. 7, sliding end 3c can be along the directions non-parallel to guide surface 12c referring to Figure 1
It is moved in open slot 12a and is abutted with guide surface 12c.Since sliding end 3c can be moved along the direction non-parallel to guide surface 12c
It moves to open slot 12a, further simplifies the structure of blade 3, further avoiding blade 3, there are the feelings of stress raisers
The stress-bearing capability of condition, blade 3 is more preferable, avoids in reaming procedure under the influence of shearing force, and blade 3 is broken or is broken.
In one embodiment of the application, Fig. 8-Figure 10 is referred to, the area of end face of the pedestal 22 far from interconnecting piece 21, which is greater than, to be connected
The area for the end face that socket part 21 is connect with pedestal 22.End face of the pedestal 22 far from interconnecting piece 21 and the bottom wall of straight hole 100 directly connect
Touching, in reaming procedure, pedestal 22 is rotated together with drilling rod 1, and end face of the pedestal 22 far from interconnecting piece 21 will wear straight hole
100 bottom wall, the area of end face of the pedestal 22 far from interconnecting piece 21 are greater than the area for the end face that interconnecting piece 21 is connect with pedestal 22,
The contact area for increasing the bottom wall of end face and straight hole 100 of the pedestal 22 far from interconnecting piece 21, reduces pressure, to reduce straight hole
The frayed degree of 100 bottom wall.Preferably, end face of the pedestal 22 far from interconnecting piece 21 is adapted with 100 bottom wall of straight hole.
In order to further decrease the frictional force that the bottom wall of straight hole 100 is subject to, reduce the frayed journey of the bottom wall of straight hole 100
It spends, in one embodiment of the application, refers to Fig. 8-Figure 10, pedestal 22 passes through polishing treatment far from the end face of interconnecting piece 21.Pass through
The coefficient of friction for reducing end face of the pedestal 22 far from interconnecting piece 21, thus the frictional force that the bottom wall for reducing straight hole 100 is subject to.
In one embodiment of the application, Fig. 8-Figure 10 is referred to, end face of the pedestal 22 far from interconnecting piece 21 is spherical surface.It is such to set
Meter is conducive to further decrease the frayed degree of the bottom wall of straight hole 100.
Lubricant medium, such as lubricant grease can also be smeared far from the end face of interconnecting piece 21 in pedestal 22, can further subtracted
The frayed degree of the bottom wall of small straight hole 100.
In one embodiment of the application, 1 and Figure 12, blade 3b include the first cutting face 3b ' and cut with first referring to Figure 1
Second cutting face 3b " of face 3b ' connection, the first cutting face 3b ' are carried on the back towards rear bottom expanding drill direction of travel, the second cutting face 3b "
From rear bottom expanding drill direction of travel, the area of the first cutting face 3b ' is greater than the area of the second cutting face 3b ".Such design, not only
Cutting reaming is carried out to straight hole 100 by rotary motion convenient for rear bottom expanding drill, moreover it is possible to reduce the damage that blade 3b is subject to.
In one embodiment of the application ,-Fig. 7 referring to Figure 1, the quantity at least two of open slot 12a, the edge otch 12a
The circumferentially-spaced of mounting portion 12 is uniformly distributed, and the quantity of blade 3 is equal with the quantity of open slot 12a.Such structure expands after being convenient for
Reaming is rapidly completed in subdrilling head, reduces the damage that single blade 3 is subject to, otch 12a is along the circumferentially-spaced uniform of mounting portion 12
Distribution, that is to say, that the interval of blade 3 is uniformly distributed, and avoids rear bottom expanding drill eccentric in rotary motion.
Preferably, the quantity of open slot 12a is two, and otch 12a is uniformly distributed along the circumferentially-spaced of mounting portion 12,
That is, two open slot 12a along ontology 11 axisymmetrical be distributed, two open slot 12a in a plane, Ke Yijian
Change interconnecting piece 21, interconnecting piece 21 is designed as tabular, convenient for processing the second axis hole 21a on interconnecting piece 21.The quantity of blade 3
It also is two, blade 3 is distributed along the axisymmetrical of ontology 11.Two guide surface 12c can be distributed along the axisymmetrical of ontology 11,
Guide surface 12c can be located on the axis of ontology 11 close to one end of yoke frame 2, then two blades 3 are towards one end of ontology 11
On the axis of ontology 11.Such design, blade 3 are located on the axis of ontology 11 towards one end of ontology 11, two blades 3
It is mutually abutted towards one end of ontology 11, two blades 3 in the same plane, make full use of limited space, increase blade 3
Structural strength, the force-bearing situation for improving blade 3, blade 3 are distributed along the axisymmetrical of ontology 11, and rear bottom expanding drill is avoided to rotate
It is eccentric in movement, realize quick reaming.
The implementation method of bottom expanding drill after provided by the embodiments of the present application, 3- Figure 16, normal drill bit are formed directly referring to Figure 1
Rear bottom expanding drill is replaced normal drill bit, rear bottom expanding drill is put into straight hole 100, when pedestal 22 touches straight hole by hole 100
When 100 bottom wall, rear bottom expanding drill continuation moves down, due to 22 limitation of movement of pedestal, when drilling rod 1 continues towards yoke frame 2
When movement, connector 4 is moved towards yoke frame 2, and mounting portion 12 is also moved towards yoke frame 2, is supported since interconnecting piece 21 abuts
3a is held, so that sliding end 3c be made to move along guide surface 12c towards the direction far from yoke frame 2, blade 3b is exposed to 1 outside of drilling rod,
Blade 3b touches the hole wall of straight hole 100, and when 1 stop motion of drilling rod, blade 3b is exposed to 1 outside of drilling rod to greatest extent, this
When, rotary drill rod 1 carries out reaming, and during rotary drill rod 1, blade 3, yoke frame 2, connector 4 are rotated synchronously, and reaming is formed
The expansion of type chamber 200 and rear reaming anchor bolt head after geometry it is consistent.
After the completion of reaming, the top of Xiang Zhikong 100 lifts drilling rod 1, i.e. drilling rod 1 is moved away from yoke frame 2, connector 4
Moved away from yoke frame 2, sliding end 3c is moved along guide surface 12c towards close to the direction of yoke frame 2,3 self gravity of blade and/
Or under the action of the hole wall of straight hole 100, it is accommodated in blade 3b in open slot 12a, rear bottom expanding drill takes out out of straight hole 100,
Shape forming cavity 200 in straight hole 100.
After taking-up after bottom expanding drill, rear reaming anchor bolt compatible with straight hole 100 is put into straight hole 100, in rear reaming
The screw jacket of anchor bolt connects hollow pipe, hammers hollow pipe, so that being fitted close shape with type chamber 200 after rear reaming anchor bolt head expansion
One end outside straight hole 100, fixation fastener, after realization are exposed in screw rod at mechanical locking mechanism, then by fastener noose
Reaming anchor bolt is fixed.
In the embodiment of the present application, yoke frame 2, connector 4 can be made of 40 chromium alloyed steels, and blade 3 can use tungsten
Steel alloy production.
It should be noted that bottom expanding drill can be not only used for straight hole in post-anchoring technology after provided by the embodiments of the present application
Reaming can be used for the reaming of other drillings.
Each embodiment/embodiment provided by the present application can be combined with each other in the case where not generating contradictory situation.
The foregoing is merely the preferred embodiments of the application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Claims (10)
1. bottom expanding drill after a kind of characterized by comprising
Drilling rod, the drilling rod include ontology and the mounting portion that connect with the ontology, be formed on the mounting portion open slot and
First shaft hole, the mounting portion, which corresponds to, has the guide surface being obliquely installed on the open slot；
Yoke frame, the yoke frame include interconnecting piece and the pedestal that connect with the interconnecting piece, are formed on the interconnecting piece
Two axis holes, the interconnecting piece can move in the open slot；
Blade, the blade include support end, blade and sliding end, and the sliding end is arranged in the open slot, the branch
End is supportted towards the interconnecting piece, the blade is towards on the outside of the open slot；And
Connector, the connector pass through the first shaft hole and second axis hole, the interconnecting piece are movably connected in
On the mounting portion, wherein one in the first shaft hole and second axis hole is adapted with the connector, and described
Another in one axis hole and second axis hole is along the axially extending of the drilling rod；
When the drilling rod moves and the base motions are by limited time towards the yoke frame, the interconnecting piece abuts the support
End, the direction for making the sliding end face away from the yoke frame along the guiding move, and the blade is exposed to the drilling rod
Outside；When the drilling rod is moved away from the yoke frame, the sliding end can be along the guide surface towards close to the yoke frame
Direction movement, be accommodated in the blade in the open slot.
2. bottom expanding drill after according to claim 1, which is characterized in that the guide surface is close to one end of the yoke frame
On the axis of the ontology, the blade is located on the axis of the ontology towards one end of the ontology.
3. bottom expanding drill after according to claim 1, which is characterized in that the mounting portion includes sliding part and the cunning
The limiting section of dynamic portion's connection forms the open slot on the limiting section, and the guide surface is formed on the sliding part, described
The outer surface of limiting section is at least partly lower than the outer surface of the ontology, to form solid-holding slot.
4. bottom expanding drill after according to claim 3, which is characterized in that the limiting section is towards bottom expanding drill row after described
Thickness into direction side is less than the limiting section away from the thickness of the rear bottom expanding drill direction of travel side.
5. bottom expanding drill after according to claim 3, which is characterized in that bottom expanding drill includes being set to described after described
The external surface and slag guiding trough being connected to the solid-holding slot, the slag guiding trough are axially extending along the ontology.
6. rear bottom expanding drill described in -5 any one according to claim 1, which is characterized in that the sliding end can be along non-flat
Row is moved in the open slot in the direction of the guide surface to abut with the guide surface.
7. rear bottom expanding drill described in -5 any one according to claim 1, which is characterized in that the pedestal is far from the connection
The area of the end face in portion is greater than the area for the end face that the interconnecting piece is connect with the pedestal.
8. bottom expanding drill after according to claim 7, which is characterized in that the pedestal is passed through far from the end face of the interconnecting piece
Cross polishing treatment；
And/or end face of the pedestal far from the interconnecting piece is spherical surface.
9. rear bottom expanding drill described in -5 any one according to claim 1, which is characterized in that the blade includes the first cutting
Face and the second cutting face connecting with first cutting face, first cutting face is towards bottom expanding drill traveling side after described
To second cutting face is greater than described second away from the rear bottom expanding drill direction of travel, the area in first cutting face
The area in cutting face.
10. rear bottom expanding drill described in -5 any one according to claim 1, which is characterized in that the quantity of the open slot is extremely
It is less two, the otch is uniformly distributed along the circumferentially-spaced of the mounting portion, the quantity of the blade and the open slot
Quantity it is equal.
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| CN201910796714.0A CN110424897B (en) | 2019-08-27 | 2019-08-27 | Post-reaming bit |
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| CN201910796714.0A CN110424897B (en) | 2019-08-27 | 2019-08-27 | Post-reaming bit |
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| CN110424897B CN110424897B (en) | 2024-06-07 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110485931A (en) * | 2019-08-27 | 2019-11-22 | 中铁第四勘察设计院集团有限公司 | Bottom expanding drill afterwards |
| CN111236846A (en) * | 2020-01-21 | 2020-06-05 | 中铁第四勘察设计院集团有限公司 | Bottom expanding drill bit |
| CN114165164A (en) * | 2021-12-13 | 2022-03-11 | 中南大学 | A kind of grooved drill bit and construction method of waterproof structure |
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| CN114165164B (en) * | 2021-12-13 | 2023-03-14 | 中南大学 | Grooving drill bit and construction method of waterproof structure |
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| CN110424897B (en) | 2024-06-07 |
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