CN2459348Y - Counter-circulation bottom enlarging drill for hole drilling - Google Patents
Counter-circulation bottom enlarging drill for hole drilling Download PDFInfo
- Publication number
- CN2459348Y CN2459348Y CN 01203179 CN01203179U CN2459348Y CN 2459348 Y CN2459348 Y CN 2459348Y CN 01203179 CN01203179 CN 01203179 CN 01203179 U CN01203179 U CN 01203179U CN 2459348 Y CN2459348 Y CN 2459348Y
- Authority
- CN
- China
- Prior art keywords
- drill
- rotary support
- drill bit
- pipe
- seat
- 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
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- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Earth Drilling (AREA)
Abstract
The utility model discloses a counter-circulation bottom enlarging drill for hole drilling, which adopts a flexible rotary supporting seat to make the drill not downwards drilled, the measurement of bottom enlarging accurate, much compacted macadam not pressed, and the bottom of a hole clean when the drill works. The drill adopts the method that a supporting point on a hole enlarging arm is moved around a through shaft to expand an enlarged base. The shape of an enlarged head is accurate and obvious. The drill adopts a tubular structure and is provided with an upper guide cover and a lower guide cover. The utility model has the advantages of good guide performance and stable guide performance when the drill is lifted in the hole and is used for enlarging the base.
Description
The utility model relates to a kind of drill bit, especially a kind of reverse circulation drilling bottom expanding drill.
The bottom expanding drill type that adopts in engineering construction at present is more, but some problems of ubiquity, perhaps expanding end head shapes is difficult to control not in place, perhaps guidance quality is poor, perhaps not having excessive the reaching with the problem of drill bit relative motion of quiet bearing or quiet bearing fails to solve, the appearance drill bit creeps into and moves down the heavy quarrel of compacting etc., makes the control of boring and expanding bottom pile difficult quality.
The purpose of this utility model is providing a kind of reverse circulation drilling bottom expanding drill, and this drill bit has been avoided the shortcoming of above technology effectively, can satisfy the engineering construction needs, guarantees the boring and expanding bottom pile quality.
The technical solution of the utility model is: a kind of reverse circulation drilling bottom expanding drill, slip pipe upper end, drill bit top mounting flange, be connected with drilling rod during work, drill bit is a cylindrical shell in the middle of the middle part, the cylindrical shell upper and lower end parts is provided with, following seat, on, the outer guard aperture guide housing up and down that is with of following seat, reamer arm is a box-like structure, cutting element is housed on it, and reamer arm top is connected with the journal stirrup at the seat of honour by wearing axle, and the bottom is connected with connecting rod one end by wearing axle, the connecting rod other end is connected with the journal stirrup of slip pipe lower end by wearing axle, slip pipe is the outer tetragonal structure of interior circle, can slide up and down the drivening rod motion along hole, four directions, center, the seat of honour, thereby strut or draw in reamer arm, following seat center mounting core pipe, core pipe middle part connects inhales the quarrel pipe, and the lower end connects rotary support.The rotary support top of this bottom expanding drill is provided with junction plate, and rotating shaft is connected with junction plate, and rotary support is provided with shell outward, and the shell internal upper part is provided with sealing ring, is provided with bearing in the shell, and rotary support links together by connecting plate and drill bit core pipe.
The utility model reverse circulation drilling bottom expanding drill adopts rotary support flexibly, make the drill main body rotation freely, and rotary support is motionless, thereby whole drill bit can not creep into downwards, expand accurate measurement,, can not push down the more heavy quarrel of compacting because the rotary support area is less, inhale quarrel by anti-circulation again, clean at the bottom of the hole.Fulcrum is contained on the bit body on the employing reamer arm, and its center of rotation is not upper and lower to be moved, and lower fulcrum struts reamer arm by connecting rod and expands the end, and it is identical to revolve the contour shape that turns around when the enlarged footing shape is opened with drill bit, expands position, end shape accurately, intuitively.Drill bit has adopted tubular structure, and is provided with guard aperture guide housing up and down, and the drill bit steering capability is good, stable.
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 is the utility model reverse circulation drilling bottom expanding drill structural representation;
Fig. 2 is the utility model reverse circulation drilling bottom expanding drill rotary support B-B schematic diagram.
A kind of reverse circulation drilling bottom expanding drill, drill bit top slip pipe 3 upper end mounting flanges 2, be connected with drilling rod 1 during work, drill bit is a cylindrical shell 4 in the middle of the middle part, cylindrical shell 4 upper and lower end parts are provided with, following seat 5,6, on, following seat 5, the 6 outer guard aperture guide housings 7 up and down that are with, 8, reamer arm 9 is a box-like structure, cutting element 10 is housed on it, and reamer arm 9 tops are connected with the journal stirrup 12 at the seat of honour 5 by wearing axle 11, and the bottom is connected with connecting rod 14 1 ends by wearing spools 13, connecting rod 14 other ends are connected with the journal stirrup 16 of slip pipe 3 lower ends by wearing axle 15, slip pipe 3 is the outer tetragonal structure of interior circle, can slide up and down in hole, four directions, 5 centers drivening rod 14 motions along the seat of honour, thereby strut or draw in reamer arm 9, following seat 6 center mounting core pipes 17, core pipe 17 middle parts connect inhales quarrel pipe 18, and the lower end connects rotary support 19.Rotary support 19 tops of this bottom expanding drill are provided with junction plate 20, rotating shaft 21 is connected with junction plate 20, is provided with shell 22 outside the rotary support 19, and shell 22 internal upper parts are provided with sealing ring 23, be provided with bearing 24 in the shell 22, rotary support 19 links together by connecting plate 20 and drill bit core pipe 17.
During work, drill bit is connected with drilling rod, arrives down at the bottom of the hole, the rotary support supporting is motionless, drill bit drives and can rotate flexibly by drilling rod, and under the effect of weight, slip pipe glides, and struts on the reamer arm cutting rock by connecting rod, inhale quarrel by inhaling the anti-circulation of quarrel pipe, outside hole subdrilling quarrel tap, realize expanding at the end.
Claims (2)
1, a kind of reverse circulation drilling bottom expanding drill, it is characterized in that: drill bit top slip pipe (3) upper end mounting flange (2), be connected with drilling rod (1) during work, drill bit is cylindrical shell (4) in the middle of the middle part, cylindrical shell (4) upper and lower end parts is provided with, following seat (5,6), on, following seat (5,6) the outer guard aperture guide housing (7 up and down that is with, 8), reamer arm (9) is a box-like structure, cutting element (10) is housed on it, reamer arm (9) top is connected with the journal stirrup (12) of the seat of honour (5) by wearing axle (11), the bottom is connected with connecting rod (14) one ends by wearing axle (13), connecting rod (14) other end is connected with the journal stirrup (16) of slip pipe (3) lower end by wearing axle (15), slip pipe (3) is the outer tetragonal structure of interior circle, can slide up and down drivening rod (14) motion in hole, four directions, (5) center along the seat of honour, thereby strut or draw in reamer arm (9), following seat (6) center mounting core pipe (17), core pipe (17) middle part connect inhales quarrel pipe (18), and the lower end connects rotary support (19).
2, reverse circulation drilling bottom expanding drill according to claim 1, it is characterized in that: the rotary support of this bottom expanding drill (19) top is provided with junction plate (20), rotating shaft (21) is connected with junction plate (20), the outer shell (22) that is provided with of rotary support (19), shell (22) internal upper part is provided with sealing ring (23), be provided with bearing (24) in the shell (22), rotary support (19) links together by connecting plate (20) and drill bit core pipe (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01203179 CN2459348Y (en) | 2001-01-18 | 2001-01-18 | Counter-circulation bottom enlarging drill for hole drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01203179 CN2459348Y (en) | 2001-01-18 | 2001-01-18 | Counter-circulation bottom enlarging drill for hole drilling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2459348Y true CN2459348Y (en) | 2001-11-14 |
Family
ID=33624752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01203179 Expired - Fee Related CN2459348Y (en) | 2001-01-18 | 2001-01-18 | Counter-circulation bottom enlarging drill for hole drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2459348Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103004329A (en) * | 2013-01-17 | 2013-04-03 | 山东理工大学 | Planting digging machine drill with variable diameter |
-
2001
- 2001-01-18 CN CN 01203179 patent/CN2459348Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103004329A (en) * | 2013-01-17 | 2013-04-03 | 山东理工大学 | Planting digging machine drill with variable diameter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |