CN106761512B - Core cutting device and construction method - Google Patents
Core cutting device and construction method Download PDFInfo
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- CN106761512B CN106761512B CN201611236952.9A CN201611236952A CN106761512B CN 106761512 B CN106761512 B CN 106761512B CN 201611236952 A CN201611236952 A CN 201611236952A CN 106761512 B CN106761512 B CN 106761512B
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- Prior art keywords
- chain
- cutter
- core
- barrel drill
- annular groove
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors
- E21B25/10—Formed core retaining or severing means
Abstract
The invention discloses a rock core cutting device which comprises a barrel drill, a chain-shaped cutter, a tensioning device and a transmission device. The barrel drill is used for drilling into a rock stratum and forming a columnar core in the barrel; the chain-shaped cutter is connected end to end, one part of the chain-shaped cutter is arranged in the barrel drill and can be contacted with the outer wall of the columnar core when in operation and saw off the columnar core; the tensioning device is used for keeping the chain-shaped cutter in a tensioning state when the chain-shaped cutter runs; and the transmission device is used for driving the chain cutter to operate. The core cutting device provided by the invention is simple in structure, can be used for cutting off the core quickly and safely, and is convenient to use.
Description
Technical Field
The invention relates to the technical field of rock entering and core taking of a rotary drilling machine, in particular to a core cutting device and a construction method.
Background
It is often necessary to remove cylindrical rock samples from the ore body or seam of solid mineral products as required by geological exploration work or engineering.
After the rotary excavating machine is driven into rock and drilled into hard rock, a drum drill bit is usually adopted for drilling, when the barrel body rotates, the hard alloy on the edge of the barrel body cuts a notch in a rock stratum, and the rock stratum is cut into a columnar body along with continuous sinking of the drill bit. At present, the columnar body is generally broken by utilizing the power of a drilling machine, and then the columnar core is taken out through a drill bit. And the drilling is repeated continuously, and finally the drilling is carried out to the designed depth.
In actual operation, because hard rock is relatively complete, the hard rock is combined with original rock more closely, and especially a pile with a larger pile diameter is limited by torque of a rotary drilling rig.
Disclosure of Invention
The core cutting device and the construction method provided by the invention solve one or more problems in the prior art.
The core cutting device comprises a barrel drill, a chain-shaped cutter, a tensioning device and a transmission device, wherein,
the barrel drill is used for drilling into a rock stratum and forming a columnar core in the barrel;
the chain-shaped cutter is connected end to end, one part of the chain-shaped cutter is arranged in the barrel drill and can be contacted with the outer wall of the columnar core when in operation and saw off the columnar core;
the tensioning device is used for keeping the chain-shaped cutter in a tensioning state when the chain-shaped cutter runs;
and the transmission device is used for driving the chain cutter to operate.
The core cutting device provided by the invention is simple in structure, can be used for cutting off the core quickly and safely, and is convenient to use.
In some embodiments, the tensioning device comprises a bracket, a tensioning wheel, a traction member, wherein,
a tension pulley which is arranged at a part of the chain cutter outside the barrel drill and can keep the chain cutter in a tensioned state by pulling a shaft of the tension pulley;
the bracket is arranged on the barrel drill and used for arranging the tension wheel, and the tension wheel can move on the bracket;
and the traction component is used for pulling the shaft of the tension wheel.
Therefore, the chain-shaped cutter can be in a tensioning state during working through the tensioning device, the core can be cut quickly, the structure is simple, and the cost is saved.
In some embodiments, the first annular groove is formed in the round wheel of the tension wheel, the portion, located outside the barrel drill, of the chain cutter is matched with the first annular groove, and the tension wheel drives the chain cutter to operate.
Therefore, the tensioning wheel can be better matched with the chain-shaped cutter, the chain-shaped cutter is prevented from slipping out of the tensioning wheel with the tensioning wheel in operation, and the circular operation of the chain-shaped cutter can be realized.
In some embodiments, the bracket is provided with a through groove for accommodating the shaft of the tension wheel, and the traction component pulls the shaft of the tension wheel to enable the tension wheel to move along the through groove; the transmission device drives the shaft of the tension wheel to rotate.
So, the take-up pulley can be on the support steady removal, guarantees the stability in the working process. Meanwhile, the transmission device drives the chain-shaped cutter to operate through the tension wheel, so that the chain-shaped cutter operates more stably and is more beneficial to cutting the columnar core.
In some embodiments, the inner wall of the barrel drill is provided with a second annular groove for accommodating part of the chain-shaped cutter, and the side wall of the barrel drill corresponding to the second annular groove is provided with a first through hole for the chain-shaped cutter to enter the second annular groove;
the chain-shaped cutter can move out of the second annular groove and contact with the outer wall of the columnar rock core in the barrel drill.
Therefore, the chain-shaped cutter does not obstruct the rock drilling work of the barrel brick in a non-running state, and meanwhile, when the columnar core needs to be cut, the chain-shaped cutter can be in contact with the outer wall of the core to cut the core.
In some embodiments, a stop is provided on a side of the second annular groove adjacent to the bottom of the barrel drill.
Thus, the blocking portion enables the chain-shaped cutter to be prevented from falling out of the first annular groove under the condition that the barrel drill shakes.
In some embodiments, the chain-type cutter guide device further comprises a guide wheel, wherein the guide wheel is arranged on the barrel drill and is used for guiding the motion track of the chain-type cutter;
the guide wheel is provided with a third annular groove, the chain-shaped cutter is matched with the third annular groove, and the chain-shaped cutter can drive the guide wheel to rotate.
Therefore, the chain cutter can smoothly run along the set route, and the direct friction between the chain cutter and the barrel drill and the damage to the barrel drill can be avoided.
In some embodiments, the power device is a subsea electric motor or a hydraulic motor.
Thus, the structure is simple, the weight is light, and the load of the barrel drill is reduced
In some embodiments, the chain cutter is made of a superhard material.
Therefore, the core can be cut quickly, and the cutter is wear-resistant and low in loss.
The core cutting construction method provided by the invention comprises the following steps:
s1: after the pile hole is constructed to the rock surface of the bearing stratum, the barrel drill drills into the rock stratum, and a columnar rock core is formed inside the barrel drill;
s2: through the traction component, the tensioning wheel rises along the through groove on the bracket, and the chain-shaped cutter is pulled out from the second annular groove and is tightly contacted with the outer wall of the rock core;
s3: starting a transmission device to drive a tension pulley to run, wherein the tension pulley drives a chain-shaped cutter to circularly move and rub the outer wall of the core to cut the core;
s4: after the chain-shaped cutter circularly moves to cut the rock core for a certain time, the chain-shaped cutter can be loosened, the chain-shaped cutter can be lifted up through the step 2, the chain-shaped cutter is contracted, and meanwhile, the step 3 is repeated, so that the tension of the chain-shaped cutter in the cut rock core is adjusted;
s5: repeating the steps S3-S4 until the rock pillar body is cut off and is completely separated from the bottom layer;
s6: lifting the core by using a rotary digging machine, and integrally taking out the columnar core;
s7: and repeating the steps S1-S6 until the design depth, and entering the subsequent step of the cast-in-place pile.
Drawings
Fig. 1 is a schematic structural view of a core cutting apparatus according to an embodiment of the present disclosure;
fig. 2 is a schematic view of a barrel drill structure of a core cutting apparatus according to an embodiment of the present disclosure;
fig. 3 is a schematic view of a tension wheel structure of a core cutting device according to an embodiment of the present disclosure;
fig. 4 is a state diagram of a barrel drill of the core cutting device cutting a rock formation into columnar cores according to the embodiment of the invention;
fig. 5 is a cross-sectional view of a cut core of a core cutting apparatus according to an embodiment of the present disclosure.
Detailed Description
The invention is further described in detail below with reference to the drawings.
As shown in fig. 1 to 5, the core cutting device comprises a barrel drill 1, a chain-shaped cutter 2, a tensioning device 3 and a transmission device 4. Wherein also guide wheels 5 are included.
The top of the barrel drill 1 is provided with a drill rod connector 88 for connecting a drill rod, the barrel drill 1 is the prior rotary drilling machine barrel drill 1, and the rock core cutting device provided by the invention is arranged on the barrel drill 1. When the barrel drill 1 drills into a rock stratum so that the barrel drill 1 internally forms the columnar core 99, the core cutting device is started to rapidly cut the columnar core 99.
Specifically, the chain cutter 2 is arranged end to end, and a part of the chain cutter 2 is disposed in the barrel drill 1, and the other part is disposed on the tension device 3 provided on the barrel drill 1. The tensioning device 3 can keep the chain cutter 2 in a tensioned state in the operating state, and the transmission device 4 can drive the chain cutter 2 to operate through the tensioning device 3.
The inner wall that specific bucket bored 1 is equipped with second ring channel 11, and chain form cutter 2 is arranged in second ring channel 11, so, when chain form cutter 2 was in non-running state, did not hinder the bucket to bore 1 and bore into the stratum, and when chain form cutter 2 ran, chain form cutter 2 can shift out second ring channel 11 outer with the outer wall contact of bucket brill 1 inside column rock core 99, cut column rock core until sawing off column rock core 99.
In order to prevent the chain cutter 2 from falling out of the second annular groove 11 and affecting the rock drilling operation of the barrel drill 1 when the chain cutter 2 shakes on the barrel drill 1, a stop part (not shown) is arranged on one side of the second annular groove 11 close to the bottom of the barrel drill 1.
Specifically, the side wall of the barrel drill 1 corresponding to the second annular groove 11 is provided with a through hole 12 for the chain-like cutter 2 to pass through, so that one part of the chain-like cutter is configured with the barrel drill 1, and the other part of the chain-like cutter is configured with the tensioning device 3.
Specifically, the tensioning device 3 includes a bracket 31, a tensioning wheel 32, and a traction member 33. The support 31 is arranged on the barrel drill 1, the through groove 311 is arranged on the support 31, the shaft of the tension pulley 32 passes through the through groove 311 and is connected with the traction part 33, and the traction part 33 pulls the shaft of the tension pulley 32, so that the tension pulley 32 can move in the through groove 311, the chain-shaped cutter 2 moves out of the second annular groove 11 and contacts with the outer wall of the columnar core 99, and the chain-shaped cutter 2 is in a tension state. Further, a first annular groove 321 is formed in the round wheel of the tension wheel 32, and the chain-shaped tool 2 is matched with the first annular groove 321, so that the chain-shaped tool 2 and the tension wheel 32 can be prevented from slipping and falling out of the tension wheel 32 in the working process. At the same time, the tensioning wheel 32 can drive the chain cutter 2 to run.
Specifically, the transmission 4 drives the shaft of the tension pulley 32 to operate, so that the transmission 4 can drive the chain cutter 2 to operate through the tension pulley 32. The transmission device 4 in the invention can be an underwater motor or a hydraulic motor or other power devices, and is not limited at all, and as a preferred option, the transmission device 4 adopts an underwater motor or a hydraulic motor, so that the structure is simple, the weight is light, and the load of the barrel drill 1 can be reduced.
In order to ensure that the chain-shaped cutter 2 can run along a given route and run smoothly in work and simultaneously avoid the direct friction between the chain-shaped cutter 2 and the barrel drill 1 to damage the barrel drill 1, the barrel drill 1 is provided with a guide wheel 5, and the guide wheel 5 is positioned on the running track of the chain-shaped cutter 2. The guide wheel 5 is provided with a third annular groove 51, and the part of the chain-shaped cutter 2 arranged outside the barrel drill 1 is matched with the third annular groove 51, so that the chain-shaped cutter 2 is matched with the guide wheel 5 more stably, and the chain-shaped cutter is prevented from falling out of the guide wheel 5. Meanwhile, the chain-shaped cutter 2 can drive the guide wheel 5 to rotate.
In the present invention, the chain cutter 2 may be provided integrally or separately. In a preferred embodiment, the chain cutter 2 is made of a superhard material such as diamond, cubic boron nitride, etc. and is integrally formed. Therefore, the chain-shaped cutter 2 is not easy to separate in cutting, the stability of the chain-shaped cutter 2 is good in use, and the core can be cut more quickly. Meanwhile, if the cutter is worn, the cutter can be integrally replaced, the operation is simple and quick, and the replacement time cost is saved.
The invention also provides a construction method for core cutting, which comprises the following specific steps:
s1: after the pile hole is constructed to the rock surface of the bearing stratum, the barrel drill 1 drills into the rock stratum, and a columnar rock core is formed inside the barrel drill 1;
s2: through the traction component 33, the tension wheel 32 is further lifted along the through groove 311 on the bracket 31, and the chain-shaped cutter 2 is pulled out from the second annular groove 11 and is tightly contacted with the outer wall of the core 99;
s3: starting the transmission device 4 to drive the tension pulley 32 to operate, wherein the tension pulley 32 drives the chain-shaped cutter 2 to circularly move to rub with the outer wall of the core 99 to cut the core;
s4: after the chain cutter 2 circularly moves to cut the rock core 99 for a certain time, the chain cutter 2 can be loosened, the chain cutter 2 can be lifted up through the step 2, the chain cutter 2 is contracted, the step 3 is repeated at the same time, and the tension of the chain cutter 2 in the cut rock core is adjusted;
s5: repeating the steps S3-S4 until the columnar rock core 99 is cut off and is completely separated from the bottom layer;
s6: lifting the core by a rotary digging machine, and integrally taking a columnar core 99;
s7: and repeating the steps S1-S6 until the design depth, and entering the subsequent step of the cast-in-place pile.
It should be noted that, in step S6, the barrel drill 1 has a small top and a large bottom, and has a small slope, and the core 99 is wedged into the body after entering the barrel drill 1, so that the core cannot fall out of the barrel drill 1 when the rotary excavator is lifted up, which are the prior art, and the structure of the barrel drill 1 is not described in detail herein.
The above are only some embodiments of the invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept thereof, and these changes and modifications can be made without departing from the spirit and scope of the invention.
Claims (7)
1. The core cutting device is characterized by comprising a barrel drill (1), a chain-shaped cutter (2), a tensioning device (3) and a transmission device (4), wherein,
the barrel drill (1) is used for drilling into a rock stratum and forming a columnar core in the barrel;
the chain-shaped cutter (2) is connected end to end, one part of the chain-shaped cutter is arranged in the barrel drill (1), and the chain-shaped cutter can be contacted with the outer wall of the columnar rock core when in operation and can saw off the columnar rock core;
the tensioning device (3) is used for keeping the chain-shaped cutter (2) in a tensioning state when the chain-shaped cutter (2) runs;
the transmission device (4) is used for driving the chain cutter (2) to circularly operate;
the tensioning device (3) comprises a bracket (31), a tensioning wheel (32) and a traction part (33), wherein,
a tension pulley (32) which is disposed in a portion of the chain cutter (2) located outside the barrel drill (1), and which can hold the chain cutter (2) in a tensioned state by pulling the shaft of the tension pulley (32);
the bracket (31) is arranged on the barrel drill (1) and used for arranging the tension wheel (32), and the tension wheel (32) can move on the bracket (31);
a pulling member (33) for pulling up the shaft of the tension pulley (32);
the bracket (31) is provided with a through groove (311) capable of accommodating the shaft of the tension pulley (32), and the traction part (33) pulls the shaft of the tension pulley (32) to enable the tension pulley (32) to move along the through groove (311);
a second annular groove (11) used for accommodating a part of the chain-shaped cutters (2) is formed in the inner wall of the barrel drill (1), and a through hole (12) used for enabling the chain-shaped cutters (2) to enter the second annular groove (11) is formed in the side wall, corresponding to the second annular groove (11), of the barrel drill (1);
the chain-shaped cutter (2) can move out of the second annular groove (11) and is in contact with the outer wall of the columnar rock core in the barrel drill (1);
the core cutting construction method comprises the following steps:
s1: after the pile hole is constructed to the rock surface of the bearing stratum, the barrel drill (1) drills into the rock stratum, and a columnar rock core is formed inside the barrel drill (1);
s2: the tension wheel (32) is further lifted along the through groove (311) on the bracket (31) through the traction component (33), and the chain-shaped cutter (2) is pulled out from the second annular groove (11) and is tightly contacted with the outer wall of the rock core;
s3: the transmission device (4) is started to drive the tension pulley (32) to operate, and the tension pulley (32) drives the chain-shaped cutter (2) to circularly move to rub with the outer wall of the rock core to cut the rock core;
s4: after the chain cutter (2) circularly moves to cut the rock core for a certain time, the chain cutter (2) can be loosened, the chain cutter (2) can be lifted up through the step 2, the chain cutter (2) is contracted, and the step 3 is repeated at the same time, so that the tension of the chain cutter (2) in the cut rock core is adjusted;
s5: repeating the steps S3-S4 until the rock pillar body is cut off and is completely separated from the bottom layer;
s6: lifting the core by using a rotary digging machine, and integrally taking out the columnar core;
s7: and repeating the steps S1-S6 until the design depth, and entering the subsequent step of the cast-in-place pile.
2. Core cutting device according to claim 1, characterized in that the round wheel of the tension wheel (32) is provided with a first annular groove (321), the part of the chain cutter (2) located outside the barrel drill (1) is matched with the first annular groove (321), and the tension wheel (32) drives the chain cutter (2) to run.
3. Core cutting device according to claim 2, characterized in that the transmission (4) drives the shaft of a tension wheel (32) in operation.
4. Core cutting device according to claim 1, characterized in that the second annular groove (11) is provided with a stop on the side close to the bottom of the barrel drill (1).
5. Core cutting device according to any of claims 1 to 4, characterized in that it further comprises a guide wheel (5), wherein the guide wheel (5) is arranged on the barrel drill (1) and is used for guiding the motion track of the chain cutter (2);
the guide wheel (5) is provided with a third annular groove (51), the part of the chain cutter (2) arranged outside the barrel drill (1) is matched with the third annular groove (51), and the chain cutter (2) can drive the guide wheel (5) to run.
6. Core cutting device according to claim 5, characterized in that the transmission (4) is an underwater electric motor or a hydraulic motor.
7. Core cutting device according to claim 6, characterized in that the chain cutter (2) is made of a superhard material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611236952.9A CN106761512B (en) | 2016-12-28 | 2016-12-28 | Core cutting device and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611236952.9A CN106761512B (en) | 2016-12-28 | 2016-12-28 | Core cutting device and construction method |
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| Publication Number | Publication Date |
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| CN106761512A CN106761512A (en) | 2017-05-31 |
| CN106761512B true CN106761512B (en) | 2023-03-24 |
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| CN201611236952.9A Active CN106761512B (en) | 2016-12-28 | 2016-12-28 | Core cutting device and construction method |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110185405A (en) * | 2019-06-25 | 2019-08-30 | 中国铁建重工集团股份有限公司 | Core extraction device |
| CN110242235B (en) * | 2019-06-25 | 2021-08-27 | 中国铁建重工集团股份有限公司 | Major diameter broken core extraction element |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB152028A (en) * | 1919-10-07 | 1921-11-10 | Ingebret Bohn | Improvements relating to the cutting out of stone slabs or bricks from solid rock |
| US3777606A (en) * | 1972-01-13 | 1973-12-11 | B Goldstein | Zipper cutting apparatus |
| US5101718A (en) * | 1990-04-27 | 1992-04-07 | Thomas Lin | Cutting device |
| RU2165850C1 (en) * | 2000-01-31 | 2001-04-27 | Самвел Манукян | Rock cutting machine chain bar |
| JP2001311178A (en) * | 2000-04-28 | 2001-11-09 | Asia Kaiyo Kk | Ditch forming method and drilling facility |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB769863A (en) * | 1954-06-15 | 1957-03-13 | Sol Essais | Improved core bit for taking samples of soil |
| GB1073250A (en) * | 1964-11-27 | 1967-06-21 | Stitching Waterbouwkungdig Lab | Cutter head for a soil sample cutter |
| FR2102709A6 (en) * | 1970-08-17 | 1972-04-07 | Inst Francais Du Petrole | |
| CA1264316A (en) * | 1985-07-09 | 1990-01-09 | Andrew H. Bennett, (Deceased) | Wire line core barrel |
| SU1375789A1 (en) * | 1986-06-30 | 1988-02-23 | Горьковский политехнический институт им.А.А.Жданова | Drilling tool |
| US6412575B1 (en) * | 2000-03-09 | 2002-07-02 | Schlumberger Technology Corporation | Coring bit and method for obtaining a material core sample |
| US6857830B2 (en) * | 2003-01-27 | 2005-02-22 | Robert C. Holcomb | Roof core cutter |
| TWI263552B (en) * | 2003-06-05 | 2006-10-11 | Miyanaga Kk | Core cutter |
| JP2006124113A (en) * | 2004-10-29 | 2006-05-18 | Sugino Mach Ltd | Core cutting device and core cutting method |
| EP2295709A1 (en) * | 2009-08-21 | 2011-03-16 | Welltec A/S | Downhole tool head for mounting onto a downhole tool for releasing of precipitated solids |
| CN202417370U (en) * | 2011-11-24 | 2012-09-05 | 中国石油集团长城钻探工程有限公司 | Inner barrel cutting device |
| CN102678049B (en) * | 2012-04-24 | 2015-02-18 | 北京市三一重机有限公司 | Circular cutting drill bit, rotary drilling machine and rock drilling method adopting static blasting |
| JP6676401B2 (en) * | 2015-02-19 | 2020-04-08 | 株式会社大林組 | Wire saw cutting device and cutting method |
| CN205165993U (en) * | 2015-11-25 | 2016-04-20 | 博深工具股份有限公司 | Need not to get diamond bit of core |
| CN105668310B (en) * | 2016-01-25 | 2019-04-09 | 东莞市森佳机械有限公司 | Electric wire unreels line arranging device |
| CN105952406B (en) * | 2016-05-12 | 2018-05-18 | 李聚宝 | Cut coring bit in a kind of rock bottom |
| CN206309319U (en) * | 2016-12-28 | 2017-07-07 | 深圳市盛业地下工程有限公司 | Rock core cutter sweep |
-
2016
- 2016-12-28 CN CN201611236952.9A patent/CN106761512B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB152028A (en) * | 1919-10-07 | 1921-11-10 | Ingebret Bohn | Improvements relating to the cutting out of stone slabs or bricks from solid rock |
| US3777606A (en) * | 1972-01-13 | 1973-12-11 | B Goldstein | Zipper cutting apparatus |
| US5101718A (en) * | 1990-04-27 | 1992-04-07 | Thomas Lin | Cutting device |
| RU2165850C1 (en) * | 2000-01-31 | 2001-04-27 | Самвел Манукян | Rock cutting machine chain bar |
| JP2001311178A (en) * | 2000-04-28 | 2001-11-09 | Asia Kaiyo Kk | Ditch forming method and drilling facility |
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| CN106761512A (en) | 2017-05-31 |
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