CN101699020A - Rotary underreamer - Google Patents
Rotary underreamer Download PDFInfo
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- CN101699020A CN101699020A CN200910209002A CN200910209002A CN101699020A CN 101699020 A CN101699020 A CN 101699020A CN 200910209002 A CN200910209002 A CN 200910209002A CN 200910209002 A CN200910209002 A CN 200910209002A CN 101699020 A CN101699020 A CN 101699020A
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- rotary
- mud
- underreamer
- whirligig
- scraping apparatus
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Abstract
The invention relates to a rotary underreamer, in particular to a rotary underreamer with functions of extension and contraction. The rotary underreamer is mainly used for filling pile construction in buildings, bridges and other engineering, and is an auxiliary device of a rotary drilling rig in basic devices. The rotary underreamer comprises a cylinder body, a rotary device, a mud scraper and an adapter sleeve, wherein the mud scraper is arranged on the front end of the rotary device; the adapter sleeve is fixed on the back end of the rotary device; the inner wall of the cylinder body is provided with a convex ring, and an internal thread is arranged on the convex ring; the rotary device comprises a rotary device outer casing, a rotary shaft and a connecting plate; the rotary device outer casing is fixedly connected with the rotary shaft through the connecting plate; the outer side of the rotary device outer casing is provided with a convex ring, and an external thread is arranged on the convex ring; and the cylinder body cooperates with the rotary device through the internal thread and the external thread. The rotary underreamer can regulate the angle of the mud scraping blade and control the mud scraping blade to extend and contract; the rotary underreamer can expand holes in required positions and freely control the depth, the length and the circular diameter of the hole; and the rotary underreamer reduces the construction cost and increases the bearing capacity of the pile body.
Description
Technical field
The present invention relates to a kind of rotary underreamer, relate in particular to a kind of rotary underreamer with Telescopic.Being mainly used in the construction of castinplace pile in building, bridge and other engineering, is the auxiliary equipment of rotary drilling rig in the infrastructure device.
Background technology
In building building, bridge and other engineering, run into soft foundation, because the development of highrise building, speedway, high-speed railway, viaduct is more and more higher to the supporting capacity requirement of ground through regular meeting.At present, in soft foundation a large amount of use the friction pile classes as: castinplace pile, draw stake, post such as anchor.The size of frictional force has determined the size of pile body bearing capacity between pile body and soil layer.But use existing bored concrete pile technology, the outer wall of the cylindrical pile body of formation is more level and smooth, causes the conjugation of pile body and soil layer relatively poor, frictional force is less, the supporting capacity of pile body a little less than.For guaranteeing workmanship, the designer adopts methods such as increasing stake number or intensification hole depth more, but this not only can strengthen engineering quantity, also can cause mud contamination to increase.
For addressing this problem, some engineerings have adopted the concave-convex bored pile at present.Experimental results show that the concave-convex stake can improve the frictional force of pile body and soil layer, thereby improve the bearing capacity of pile body.But China patent application prospectus ZL 96229360.1 discloses a kind of reducing borehole-enlarging drilling, and this reamer can change on request and increase cutting diameter when drilling construction, forms double wedge one by one on pile body.But should reducing borehole-enlarging drilling be between drill bit and drilling rod, to be provided with a reamer, this reamer includes an external diameter and the identical cylindrical shell in design aperture, stake hole, one is arranged on that power turbine in the cylindrical shell, gear drive and one link to each other with gear drive, the telescopic reaming head of its bit, and this cylindrical shell is connected with drilling rod and bit sub respectively mutually with its upper/lower terminal.This reamer utilizes the liquid stream impeller of drilling tool to rotate, and drives bit flexible of reaming head through gear drive, realizes the purpose of reaming.But this reamer is to finish reaming simultaneously in the process of piling, and the double wedge on the pile body that is drilled to is less, only is to increase bearing capacity to a certain extent by the frictional force that increases pile body surface and soil layer.Therefore the supporting capacity of pile body still is limited.
In order further to improve the supporting capacity of bored pile, adapt to the construction of building.Began to promote the castinplace pile of laemodipodiform in recent years, experimental results show that it can make the vertical static pressure of single pile improve more than 40%.And can the key of the castinplace pile of laemodipodiform be get out satisfactory laemodipodiform stake hole on pile body.Chinese invention patent manual ZL 97235191.4 discloses a kind of hydraulic pressure pouring pore expander.This hydraulic pressure pouring pore expander is by hydraulic cylinder, support, drive block and crank arm and constitute, and the promotion by hydraulic cylinder piston forces cranks arm to pile body perisporium extruding carrying out reaming; Hydraulic cylinder piston shrinks and drives the homing of cranking arm.But the machine of hydraulic underreamer damages easily, the cost height; And can not guarantee the quality in the required stake of engineering hole, be difficult to promote.Therefore in laemodipodiform filling pile construction process, need a kind of simple controllable, need not to add the extra power device and just can excavate the strong reaming of bearing capacity, and the low reamer of cost.
Summary of the invention
The purpose of this invention is to provide a kind of rotary underreamer, make when the laemodipodiform bored pile construction, can on pile body, get out the reaming that can improve pile body vertical bearing pressure that meets construction requirement as requested simply and easily.And only utilize mechanical rotary power, construction cost is low.
The present invention is achieved in that a kind of rotary underreamer, is made up of cylindrical shell, whirligig, mud-scraping apparatus, mud-scraping apparatus installing rack and coupling sleeve, and it is characterized in that: described mud-scraping apparatus is located at the front end of whirligig; Described coupling sleeve is fixed on the rear end of whirligig; Described cylinder inboard wall has a bulge loop, and described bulge loop is provided with internal thread; Described whirligig is made of rotary device outer casing, axis of rotation, junction plate, and described rotary device outer casing and axis of rotation are connected by junction plate; There is a bulge loop in the outside of described rotary device outer casing, and described bulge loop is provided with external screw thread; Described barrel jacket is outside whirligig, and both cooperate by internal thread and external screw thread separately.
Half of the outside bulge loop length that described cylinder inboard wall bulge loop is a rotary device outer casing.The lower end of described cylindrical shell is connected with the mud-scraping apparatus installing rack by terminal pad; Described mud-scraping apparatus installing rack is the square structure, is provided with installing port around it, is equipped with fixed mount in described installing port both sides.
Described mud-scraping apparatus by terminal pad, the piece that links, scrape trowel and constitute; Described terminal pad is fixed on the front end of the axis of rotation of whirligig; The described trowel of scraping flexibly connects by interlock piece and described terminal pad.
The described trowel of scraping is made of contiguous block, knife rest, locating shaft and cutter head; Described contiguous block and knife rest are affixed, and described knife rest and cutter head are affixed, and described knife rest passes the installing hole on the mud-scraping apparatus installing rack, and flexibly connect by locating shaft and described fixed mount.Have two described mud-scraping apparatus at least, be symmetrical distribution.
Described knife rest is provided with fixed mount, and described cutter head is connected by fixed mount and knife rest.
The invention has the beneficial effects as follows: be transformed into axial stretching power by the rotation radial load, regulate the angle of scraping trowel by axial stretching, the flexible of trowel scraped in control, thereby guarantees to carry out on the basis of original vertical pile body reaming.And can reach according to a reaming construction requirement control stake hole depth, reaming length and circular diameter in the desired location reaming.When reducing operating expenses, improve the bearing capacity in stake hole.
Description of drawings
Fig. 1 is former pile body generalized section
Fig. 2 is a pile body generalized section after the employing reaming of the present invention;
Fig. 3 is a structural representation of the present invention;
Fig. 4 is the structural representation of cylindrical shell of the present invention and mud-scraping apparatus installing rack;
Fig. 5 is the structural representation of whirligig of the present invention;
Fig. 6 is the structural representation of mud-scraping apparatus of the present invention.
Specific embodiment
Below in conjunction with drawings and Examples the present invention is elaborated:
The present invention is a kind of rotary underreamer, is made up of cylindrical shell 1, whirligig 2, mud-scraping apparatus 3, mud-scraping apparatus installing rack 4 and coupling sleeve 5.Described whirligig 2 rises 5 by side fixed thereon and is connected with the square column of the rotary drilling rig of construction operation, and the square column by rotary drilling rig provides rotary power for whirligig 2.Described mud-scraping apparatus 3 is located at the front end of whirligig 2, and whirligig 2 drives mud-scraping apparatus 3 and rotates together.
Described cylindrical shell 1 inwall has a bulge loop 11, and described bulge loop 11 is provided with internal thread 12; Described whirligig 2 is made of rotary device outer casing 21, axis of rotation 22, junction plate 23; Described rotary device outer casing 21 and axis of rotation 22 are connected by junction plate 23; There is a bulge loop 24 in the outside of described rotary device outer casing 21, and described bulge loop 24 is provided with external screw thread 25;
Described cylindrical shell 1 and mud-scraping apparatus installing rack 4 are connected by terminal pad 13; Described mud-scraping apparatus installing rack is provided with installing port 41, is equipped with fixed mount 42 in described installing port 41 both sides.In the construction starting stage, the bottom part of the upper end of the internal thread 12 of described cylindrical shell 1 and the external screw thread 25 of rotary device outer casing 21 cooperates; In work progress along with described whirligig 2 to right rotation, the internal thread 12 of described cylindrical shell 1 and the external screw thread 25 of rotary device outer casing 21 oppositely cooperate, institute produces radially rotary power and drives cylindrical shell 1 and move upward, thereby is converted to axial stretching power.The bottom that connects blade 23 on described whirligig 2 touches the bottom of cylindrical shell 1.For guaranteeing that cylindrical shell 1 has enough upwards distances, the length of bulge loop 11 is half of bulge loop 24.
Described mud-scraping apparatus 3 by terminal pad 31, interlock piece 32, scrape trowel 33 and constitute; Described terminal pad 31 is fixed on the front end of the axis of rotation 22 of whirligig 2; The described trowel 33 of scraping flexibly connects by interlock piece 32 and described terminal pad 31.Terminal pad 31 rotates with axis of rotation 22, and drives the rotation of hanging trowel 33, thereby carries out the ream operation in a hole.
The described trowel 33 of scraping is made of contiguous block 331, knife rest 332, locating shaft 333 and cutter head 334; Described contiguous block 331 is affixed with knife rest 332, and described knife rest 332 is affixed with cutter head 334, and described knife rest 332 passes the installing hole 41 on the mud-scraping apparatus installing rack 4, and flexibly connects by locating shaft 333 and described fixed mount 42.
When the laemodipodiform bored pile construction, the constructor utilizes rotary drilling rig according to construction requirement earlier, gets out the cylindrical pile body on vertical and ground.Be connected in described rotary underreamer on the square column of rotary drilling rig by coupling sleeve 5 then; Described rotary underreamer extend in the pile body by rotary drilling rig, digs out laemodipodiform stake hole in the pile body both sides.When stretching into pile body, described knife rest 332 and cutter head 334 are the both sides that vertically downward state is contracted in mud-scraping apparatus installing rack 4.When the mud-scraping apparatus 3 of described rotary underreamer reaches the position of construction requirement reaming, the constructor passes through computer system, the control rotary drilling rig is to right rotation, then described whirligig 2 is also to right rotation, cause described rotary device outer casing 21 to right rotation, thereby drive the reverse routing motion between the external screw thread 25 of the internal thread 12 of described cylindrical shell 1 and rotary device outer casing 21, produce the rotation radial load and drive described cylindrical shell 1 and move upward, thereby drive moving upward of mud-scraping apparatus installing rack 4; Moving upward of described mud-scraping apparatus installing rack 4 driven upwards rotating of described knife rest 332 and cutter head 334, and the angle of described knife rest 332 and cutter head 334 rotations increases along with moving upward of mud-scraping apparatus installing rack 4, and the scope of the anglec of rotation is 0 °-90 °.
After finishing the needed reaming of construction, the constructor controls the square column of rotary drilling rig to anticlockwise by the computer system of crane, then described whirligig 2 is also to anticlockwise, the cooperation of the internal thread 12 by described cylindrical shell 1 and the external screw thread 25 of rotary device outer casing 21, drive cylindrical shell 1 and move downward, move downward thereby drive mud-scraping apparatus installing rack 4; Run into the top of cylindrical shell 1 until the upper end of described bulge loop 24; Moving downward of described mud-scraping apparatus installing rack 4 driven rotating of described knife rest 332 and cutter head 334, described knife rest 332 and cutter head 334 rotate to 0 ° gradually from 90 °, thereby stopped the reaming action of cutter head 334.
For guaranteeing construction quality, the present invention is provided with four described mud-scraping apparatus 3, is in twos to be symmetrically distributed.Can also be provided with two described mud-scraping apparatus 3, be symmetrical distribution.
For satisfying the requirement of various object of construction production for laemodipodiform hole for grout pile different size, the present invention is provided with fixed mount 335 on described knife rest 332, and described cutter head 334 is connected by fixed mount 335 and knife rest 332.Can change cutter head 334 according to the requirement of construction like this, or the cutter head 334 of wear and aging is displaced, guarantee the quality of construction.
Claims (6)
1. a rotary underreamer is made up of cylindrical shell (1), whirligig (2), mud-scraping apparatus (3), mud-scraping apparatus installing rack (4) and coupling sleeve (5), and it is characterized in that: described mud-scraping apparatus (3) is located at the front end of whirligig (2); Described coupling sleeve (5) is fixed on the rear end of whirligig (2); Described cylindrical shell (1) inwall has a bulge loop (11), and described bulge loop (11) is provided with internal thread (12); Described whirligig (2) is made of rotary device outer casing (21), axis of rotation (22), junction plate (23), and described rotary device outer casing (21) and axis of rotation (22) are connected by junction plate (23); There is a bulge loop (24) in the outside of described rotary device outer casing (21), and described bulge loop (24) is provided with external screw thread (25); Described cylindrical shell (1) is enclosed within outside the whirligig (2), and both cooperate by internal thread (12) and external screw thread (25) separately.
2. a kind of rotary underreamer according to claim 1 is characterized in that: the lower end of described cylindrical shell (1) is connected with mud-scraping apparatus installing rack (4) by terminal pad (13); Described mud-scraping apparatus installing rack (4) is the square structure, is provided with installing port (41) around it, is equipped with fixed mount (42) in described installing port (41) both sides.
3. a kind of rotary underreamer according to claim 2 is characterized in that: described mud-scraping apparatus (3) by terminal pad (31), interlock piece (32), scrape trowel (33) and constitute; Described terminal pad (31) is fixed on the front end of the axis of rotation (22) of whirligig (2); The described trowel (33) of scraping flexibly connects by interlock piece (32) and described terminal pad (31).
4. a kind of rotary underreamer according to claim 3 is characterized in that: the described trowel (33) of scraping is made of contiguous block (331), knife rest (332), locating shaft (333) and cutter head (334); Described contiguous block (331) is affixed with knife rest (332), described knife rest (332) is affixed with cutter head (334), described knife rest (332) passes the installing hole (41) on the mud-scraping apparatus installing rack (4), and flexibly connects by locating shaft (333) and described fixed mount (42).
5. a kind of rotary underreamer according to claim 1 is characterized in that: the length of the bulge loop (11) of described cylindrical shell (1) inwall is half of outside bulge loop (24) length of described rotary device outer casing (21).
6. a kind of rotary underreamer according to claim 4 is characterized in that: described knife rest (332) is provided with fixed mount (335), and described cutter head (334) is connected by fixed mount (335) and knife rest (332).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910209002A CN101699020A (en) | 2009-10-23 | 2009-10-23 | Rotary underreamer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910209002A CN101699020A (en) | 2009-10-23 | 2009-10-23 | Rotary underreamer |
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| Publication Number | Publication Date |
|---|---|
| CN101699020A true CN101699020A (en) | 2010-04-28 |
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| CN200910209002A Pending CN101699020A (en) | 2009-10-23 | 2009-10-23 | Rotary underreamer |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103084610A (en) * | 2011-11-03 | 2013-05-08 | 伍尔夫·赫尤里 | Pressure medium controlled counterbore tool with piston-cylinder unit |
| CN106639883A (en) * | 2012-10-22 | 2017-05-10 | 哈里伯顿能源服务公司 | Control module for downwards-drilling tool |
| CN109249542A (en) * | 2018-10-31 | 2019-01-22 | 重庆市瑞轩豪邦新型建材有限公司 | Air entrained concrete production equipment |
| CN109835444A (en) * | 2019-03-01 | 2019-06-04 | 常康华 | A kind of sea large-tonnage wind-powered electricity generation mounting platform |
| CN111688042A (en) * | 2020-06-22 | 2020-09-22 | 瑞安市佰德装饰工程有限公司 | Inner wall roughening machine for building wall pre-buried hole and using method thereof |
| CN113236133A (en) * | 2021-05-28 | 2021-08-10 | 武汉市汉阳市政建设集团有限公司 | Reaming reamer structure for rock excavation |
| CN114953053A (en) * | 2022-06-27 | 2022-08-30 | 林青 | Desktop cutting device is used in processing of multi-functional desk |
-
2009
- 2009-10-23 CN CN200910209002A patent/CN101699020A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103084610A (en) * | 2011-11-03 | 2013-05-08 | 伍尔夫·赫尤里 | Pressure medium controlled counterbore tool with piston-cylinder unit |
| CN103084610B (en) * | 2011-11-03 | 2016-01-20 | 伍尔夫·赫尤里 | The Counterboring apparatus that the pressure medium with piston-hydraulic cylinder unit controls |
| CN106639883A (en) * | 2012-10-22 | 2017-05-10 | 哈里伯顿能源服务公司 | Control module for downwards-drilling tool |
| CN106639883B (en) * | 2012-10-22 | 2019-01-15 | 哈里伯顿能源服务公司 | For being drilled down into the control module of tool |
| CN109249542A (en) * | 2018-10-31 | 2019-01-22 | 重庆市瑞轩豪邦新型建材有限公司 | Air entrained concrete production equipment |
| CN109835444A (en) * | 2019-03-01 | 2019-06-04 | 常康华 | A kind of sea large-tonnage wind-powered electricity generation mounting platform |
| CN111688042A (en) * | 2020-06-22 | 2020-09-22 | 瑞安市佰德装饰工程有限公司 | Inner wall roughening machine for building wall pre-buried hole and using method thereof |
| CN111688042B (en) * | 2020-06-22 | 2022-09-06 | 新疆天恒基建筑工程有限公司 | Inner wall roughening machine for building wall embedded hole and using method thereof |
| CN113236133A (en) * | 2021-05-28 | 2021-08-10 | 武汉市汉阳市政建设集团有限公司 | Reaming reamer structure for rock excavation |
| CN113236133B (en) * | 2021-05-28 | 2024-04-12 | 武汉市汉阳市政建设集团有限公司 | Reaming reamer structure for rock excavation |
| CN114953053A (en) * | 2022-06-27 | 2022-08-30 | 林青 | Desktop cutting device is used in processing of multi-functional desk |
| CN114953053B (en) * | 2022-06-27 | 2023-06-09 | 东莞市翔泉家具有限公司 | Table top cutting device for processing multifunctional office table |
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Open date: 20100428 |