CN114135231B - Reamer for geological exploration - Google Patents
Reamer for geological exploration Download PDFInfo
- Publication number
- CN114135231B CN114135231B CN202111503475.9A CN202111503475A CN114135231B CN 114135231 B CN114135231 B CN 114135231B CN 202111503475 A CN202111503475 A CN 202111503475A CN 114135231 B CN114135231 B CN 114135231B
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- Prior art keywords
- reaming
- rotating
- frame
- assembly
- sleeve
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- 230000007246 mechanism Effects 0.000 claims abstract description 47
- 230000005540 biological transmission Effects 0.000 claims abstract description 26
- 238000005553 drilling Methods 0.000 claims abstract description 24
- 238000009434 installation Methods 0.000 claims description 4
- 230000003028 elevating effect Effects 0.000 claims 1
- 238000005070 sampling Methods 0.000 abstract description 8
- 230000001360 synchronised effect Effects 0.000 abstract description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 5
- 239000011707 mineral Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
Classifications
-
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
Abstract
The invention is suitable for the field of geological exploration, and provides a reamer for geological exploration, which comprises a support frame, wherein one side of the support frame is provided with a plurality of support legs, and the reamer for geological exploration further comprises: the lifting transmission mechanism is arranged on the support frame and used for lifting reaming; the movable reaming mechanism comprises a rotary reaming assembly for rotary reaming and a reaming adjusting assembly for adjusting the reaming size, wherein the rotary reaming assembly is arranged at one end of the lifting transmission mechanism, and the reaming adjusting assembly is arranged on the rotary reaming assembly. According to the reamer for geological exploration, provided by the invention, the lifting transmission mechanism and the movable reaming mechanism are arranged, so that reaming adjustment can be performed after drilling of geological exploration is completed, and synchronous reaming is performed on the upper end of a hole, so that drilling and sampling of geological exploration are facilitated, and the operation is convenient and the reaming is rapid.
Description
Technical Field
The invention belongs to the field of geological exploration, and particularly relates to a reamer for geological exploration.
Background
Geological exploration is to survey and detect geology by various means and methods, determine a proper bearing layer, determine a foundation type according to the foundation bearing capacity of the bearing layer, and calculate investigation and research activities of foundation parameters. The method is used for finding out mineral deposits with industrial significance in mineral screening, providing mineral reserves and geological data required by mine construction design and researching geological conditions such as rock, stratum, structure, mineral, hydrology, landform and the like in a certain area in order to find out the quality and quantity of mineral and the technical conditions of exploitation and utilization.
In the geological exploration process, a sample is usually required to be punched and collected, reaming is sometimes required to be carried out at the upper end of a hole for sampling convenience, in the existing geological exploration device, two sets of devices are usually required to be respectively used for drilling and reaming, after the drilling of a sampling position is completed through a drilling device, the reaming device is used for reaming the upper end of the hole instead, and the operation is complex.
Disclosure of Invention
The embodiment of the invention aims to provide a reamer for geological exploration, which aims to solve the following problems: in the existing geological exploration device, two sets of devices are usually required to be operated respectively for drilling and reaming, after drilling of a sampling position is completed through a drilling device, reaming is carried out on the upper end of a hole by replacing the reaming device, and the operation is complex.
The embodiment of the invention is realized in such a way that the reamer for geological exploration comprises a supporting frame, one side of the supporting frame is provided with a plurality of supporting legs, and the reamer for geological exploration further comprises:
the lifting transmission mechanism is arranged on the support frame and used for lifting reaming;
The movable reaming mechanism comprises a rotary reaming assembly for rotary reaming and a reaming adjusting assembly for adjusting the reaming size, wherein the rotary reaming assembly is arranged at one end of the lifting transmission mechanism, and the reaming adjusting assembly is arranged on the rotary reaming assembly.
Preferably, the lifting transmission mechanism comprises:
the lifting seat is connected with the rotary reaming assembly and is used for driving the rotary reaming assembly to lift and ream;
The hydraulic rods are arranged in a plurality, the hydraulic rods are fixedly arranged on the supporting frame, and the output ends of the hydraulic rods are connected with the lifting seat and used for driving the lifting seat to lift.
Preferably, the rotary reaming assembly comprises:
The rotating rod is connected with the lifting transmission mechanism and used for reaming rotation;
The rotating frame is fixedly arranged at one end of the rotating rod;
One end of the first rotating sleeve is fixedly arranged on the rotating frame, one end of the first rotating sleeve, which is far away from the rotating frame, is fixedly provided with a second rotating sleeve, the diameter of the second rotating sleeve is smaller than that of the first rotating sleeve, and the outer surfaces of the first rotating sleeve and the second rotating sleeve are provided with drilling lines;
the first motor is fixedly arranged at one end of the lifting transmission mechanism, and the output end of the first motor is fixedly connected with one end of the rotating rod and used for driving the rotating rod to rotate.
Preferably, the reaming adjustment assembly comprises:
the threaded rod is in threaded connection with one end of the rotating rod, and one end of the threaded rod, which is far away from the rotating rod, is provided with an installation end head;
One end of the movable sleeve is rotatably arranged on the mounting end, and a plurality of first connecting frames are arranged on the movable sleeve;
The adjusting seats are provided with a plurality of adjusting seats which are in sliding connection with the first rotating sleeve, a second connecting frame is arranged on one side, close to the movable sleeve, of each adjusting seat, a sliding frame is arranged at one end of each adjusting seat, the sliding frames are arranged in sliding grooves in a sliding mode, and the sliding grooves are formed in the rotating frames;
The connecting strips are provided with a plurality of connecting strips, and two ends of each connecting strip are respectively and movably connected with the first connecting frame and the second connecting frame.
Preferably, a plurality of reaming nails are arranged on one side of the adjusting seat away from the movable sleeve.
Preferably, the reamer for geological exploration further comprises:
the movable supporting mechanism is arranged at one end, far away from the supporting frame, of the supporting legs and is used for movably supporting the supporting legs.
Preferably, the movable supporting mechanism includes:
the support seats are arranged at one end, far away from the support frame, of the support legs;
the universal wheels are arranged at one side of the supporting seat;
the fixed nails are arranged in a plurality of mode, and the fixed nails are movably mounted on the supporting seat.
According to the reamer for geological exploration, provided by the invention, the lifting transmission mechanism and the movable reaming mechanism are arranged, so that reaming adjustment can be performed after drilling of geological exploration is completed, and synchronous reaming is performed on the upper end of a hole, so that drilling and sampling of geological exploration are facilitated, and the operation is convenient and the reaming is rapid.
Drawings
FIG. 1 is a perspective view of a reamer for geological exploration according to an embodiment of the present invention;
fig. 2 is a perspective view of a movable supporting mechanism according to an embodiment of the present invention;
FIG. 3 is a perspective view of a lifting transmission mechanism and a movable reaming mechanism provided by an embodiment of the present invention;
FIG. 4 is a cross-sectional view of a lifting drive mechanism and a movable reaming mechanism provided by an embodiment of the present invention;
FIG. 5 is a perspective view of a reamer adjustment assembly according to an embodiment of the present invention;
FIG. 6 is a perspective view of a turret and a movable case according to an embodiment of the present invention;
FIG. 7 is a perspective view of a rotary rod and a threaded rod according to an embodiment of the present invention;
fig. 8 is a perspective view of an adjusting seat and a movable sleeve according to an embodiment of the present invention.
In the accompanying drawings: 1. a support frame; 2. support legs; 3. a movable supporting mechanism; 31. a support base; 32. fixing nails; 33. a universal wheel; 4. a lifting transmission mechanism; 41. a hydraulic rod; 42. a lifting seat; 5. a movable reaming mechanism; 51. rotating the reaming assembly; 511. a first motor; 512. a rotating lever; 513. a rotating frame; 5131. a chute; 514. a first rotating sleeve; 515. a second rotating sleeve; 52. a reaming adjustment assembly; 521. a second motor; 522. a threaded rod; 5221. installing an end head; 523. a movable sleeve; 524. a first connection frame; 525. an adjusting seat; 526. a second connecting frame; 527. reaming nails; 528. a carriage; 529. and (5) connecting strips.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Specific implementations of the invention are described in detail below in connection with specific embodiments.
As shown in fig. 1 to 3, a reamer for geological exploration, which includes a support frame 1, a plurality of support legs 2 are installed at one side of the support frame 1, and further includes:
The lifting transmission mechanism 4 is arranged on the support frame 1 and used for lifting reaming;
The movable reaming mechanism 5, the movable reaming mechanism 5 includes a rotary reaming assembly 51 for rotary reaming and a reaming adjusting assembly 52 for adjusting the reaming size, the rotary reaming assembly 51 is installed at one end of the lifting transmission mechanism 4, and the reaming adjusting assembly 52 is installed on the rotary reaming assembly 51.
In one embodiment of the invention, four supporting legs 2 which are symmetrically arranged are fixedly arranged at four corners of the lower end surface of the supporting frame 1, the lifting transmission mechanism 4 is fixedly arranged in the middle of the supporting frame 1, the movable reaming mechanism 5 is arranged at the bottom end of the lifting transmission mechanism 4, the movable reaming mechanism 5 consists of a rotary reaming assembly 51 and a reaming adjusting assembly 52, the rotary reaming assembly 51 is arranged at the bottom end of the lifting transmission mechanism 4, and the reaming adjusting assembly 52 is arranged on the rotary reaming assembly 51.
During operation, the rotary reaming assembly 51 firstly performs exploration drilling, the lifting transmission mechanism 4 drives the rotary reaming assembly 51 to gradually descend, adjustment of drilling depth is achieved, after drilling is completed, the rotary reaming assembly 51 can be in rotary fit with the rotary reaming assembly 51 through the reaming adjusting assembly 52, the upper end of the hole is reamed, accordingly the upper end of the hole is enlarged, sampling and sampling are facilitated, a reaming device is not required to be replaced, and operation is convenient and fast.
In one embodiment of the present invention, referring to fig. 1 to 8, the lifting transmission mechanism 4 includes:
The lifting seat 42 is connected with the rotary reaming assembly 51 and is used for driving the rotary reaming assembly 51 to lift and ream;
the hydraulic rods 41, the hydraulic rods 41 are provided with a plurality of hydraulic rods 41, the hydraulic rods 41 are fixedly installed on the supporting frame 1, and the output ends of the hydraulic rods 41 are connected with the lifting seat 42 and used for driving the lifting seat 42 to lift.
The rotary reaming assembly 51 comprises:
A rotating rod 512, wherein the rotating rod 512 is connected with a lifting transmission mechanism and is used for reaming rotation;
A rotating frame 513, wherein the rotating frame 513 is fixedly installed at one end of the rotating rod 512;
A first rotating sleeve 514, wherein one end of the first rotating sleeve 514 is fixedly arranged on the rotating frame 513, a second rotating sleeve 515 is fixedly arranged at one end of the first rotating sleeve 514 far away from the rotating frame 513, the diameter of the second rotating sleeve 515 is smaller than that of the first rotating sleeve 514, and drilling lines are arranged on the outer surfaces of the first rotating sleeve 514 and the second rotating sleeve 515;
The first motor 511, first motor 511 fixed mounting is in the one end of lift drive mechanism 4, the output of first motor 511 and the one end fixed connection of dwang 512 are used for driving dwang 512 rotates.
The counterbore adjustment assembly 52 comprises:
A threaded rod 522, wherein the threaded rod 522 is in threaded connection with one end of the rotating rod 512, and a mounting end 5221 is arranged at one end of the threaded rod 522 away from the rotating rod 512;
a movable sleeve 523, wherein one end of the movable sleeve 523 is rotatably mounted on the mounting end 5221, and a plurality of first connecting frames 524 are mounted on the movable sleeve 523;
The adjusting seat 525 is provided with a plurality of adjusting seats 525, the plurality of adjusting seats 525 are in sliding connection with the first rotating sleeve 514, a second connecting frame 526 is arranged on one side, close to the movable sleeve 523, of the adjusting seat 525, a sliding frame 528 is arranged at one end of the adjusting seat 525, the sliding frame 528 is slidably arranged in a sliding groove 5131, and the sliding groove 5131 is arranged on the rotating frame 513;
The connecting strips 529 are provided, and two ends of the connecting strips 529 are movably connected with the first connecting frame 524 and the second connecting frame 526 respectively.
The side of the adjustment seat 525 remote from the movable sleeve 523 is provided with a plurality of reaming nails 527.
In one embodiment of the invention, a pair of hydraulic rods 41 with vertically downward output ends are fixedly arranged on a supporting frame 1, a lifting seat 42 is fixedly arranged at the output ends of the pair of hydraulic rods 41, the top ends of rotating rods 512 are rotatably arranged in the middle of the lifting seat 42, a first motor 511 is fixedly arranged on the upper end surface of the lifting seat 42, the top ends of the rotating rods 512 are fixedly connected with the output ends of the first motor 511 through a coupling, four symmetrically arranged rotating frames 513 are fixedly arranged at the upper parts of the rotating rods 512, sliding grooves 5131 are formed in the rotating frames 513, a first rotating sleeve 514 is fixedly arranged at the lower end surface of the rotating frame 513, a second rotating sleeve 515 is fixedly arranged at the bottom ends of the first rotating sleeve 514, drilling lines are arranged on the outer surfaces of the first rotating sleeve 514 and the second rotating sleeve 515, threaded rods 522 are connected at the bottom ends of the rotating rods 512 in a threaded manner, the bottom of threaded rod 522 is provided with installation end 5221, the bottom of movable sleeve 523 rotates and installs in installation end 5221, and the bottom fixed mounting of movable sleeve 523 has second motor 521, the output of second motor 521 passes through shaft coupling fixed connection with the bottom of threaded rod 522, the surface fixed mounting of movable sleeve 523 has four first link frames 524 that the symmetry set up, the adjustment seat 525 is provided with four, the top fixed mounting of adjustment seat 525 has carriage 528, four carriage 528 symmetry slidable mounting is in spout 5131, and the one side fixed mounting that adjustment seat 525 is close to movable sleeve 523 has second link frame 526, second link frame 526 and first link frame 524 are articulated with the both ends of a pair of connecting rod 529 respectively, and four adjustment seats 525 link up slidable mounting respectively in the upper portion of first rotation sleeve 514, and the outside fixed mounting of adjustment seat 525 has a plurality of reaming nails 527.
When the drilling machine is in operation, the first motor 511 drives the rotating rod 512 to rotate, the rotating rod 512 drives the rotating frame 513 to rotate, the rotating frame 513 drives the first rotating sleeve 514 and the second rotating sleeve 515 to rotate, under the cooperation that the pair of hydraulic rods 41 drive the lifting seat 42 to lift, exploration drilling is carried out, after drilling with a certain depth is completed, the second motor 521 is controlled to drive the threaded rod 522 to rotate, the threaded rod 522 is in threaded transmission at the bottom end of the rotating rod 512, thereby adjusting the threaded connection depth of the threaded rod 522 in the rotating rod 512, further driving the relative sleeving depth between the movable sleeve 523 and the rotating rod 512, enabling the four first connecting frames 524 to move along the rotating rod 512, pushing the four second connecting frames 526 through the four pairs of connecting strips 529, enabling the sliding frame 528 at the top end of the adjusting seat 525 to slide along the sliding groove 5131, enabling the four adjusting seats 525 to stretch out along the first rotating sleeve 514, adjusting the size of the hole to be reamed, and then driving the adjusting seat 525 and the reaming nail 527 to rotate along with the rotation of the rotating rod 512.
In one embodiment of the present invention, referring to fig. 1 and 2, the reamer for geological exploration further comprises:
The movable supporting mechanism 3 is arranged at one end, far away from the supporting frame 1, of the supporting legs 2, and is used for movably supporting the supporting legs 2.
The movable supporting mechanism 3 includes:
The support seats 31 are provided, the support seats 31 are provided in plurality, and the support seats 31 are fixedly arranged at one end of the support leg 2 far away from the support frame 1;
a plurality of universal wheels 33, wherein the universal wheels 33 are arranged, and the plurality of universal wheels 33 are arranged on one side of the supporting seat 31;
the fixed nails 32 are arranged in a plurality, and the fixed nails 32 are movably arranged on the supporting seat 31.
In one embodiment of the present invention, two pairs of support legs 2 are provided, the two pairs of support legs 2 are fixedly mounted on the left and right sides of the bottom of the support frame 1, a pair of support seats 31 are fixedly mounted on the bottom of each pair of support legs 2, two universal wheels 33 are respectively mounted on two ends of the bottom of the support seats 31, and a pair of fixing nails 32 are movably mounted on two ends of the support seats 31. In operation, the position of the exploration drilling hole is changed conveniently through the movement of the universal wheel 33, and after the position of the drilling hole reaming is determined, the position of the support frame 1 can be fixed through the fixing nails 32.
According to the reamer for geological exploration, provided by the invention, the lifting transmission mechanism 4 and the movable reaming mechanism 5 are arranged, so that after the drilling of geological exploration is completed, reaming adjustment can be carried out, and synchronous reaming is carried out on the upper end of a hole, so that the drilling and sampling of geological exploration are facilitated, the operation is convenient, and the reaming is rapid.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (4)
1. The utility model provides a reamer for geological exploration, includes the support frame, its characterized in that, a plurality of supporting legs are installed to one side of support frame, reamer for geological exploration still includes:
the lifting transmission mechanism is arranged on the support frame and used for lifting reaming;
The movable reaming mechanism comprises a rotary reaming assembly for rotary reaming and a reaming adjusting assembly for adjusting the reaming size, the rotary reaming assembly is arranged at one end of the lifting transmission mechanism, and the reaming adjusting assembly is arranged on the rotary reaming assembly; the rotary reaming assembly includes: the rotating rod is connected with the lifting transmission mechanism and used for reaming rotation;
The rotating frame is fixedly arranged at one end of the rotating rod; one end of the first rotating sleeve is fixedly arranged on the rotating frame, one end of the first rotating sleeve, which is far away from the rotating frame, is fixedly provided with a second rotating sleeve, the diameter of the second rotating sleeve is smaller than that of the first rotating sleeve, and the outer surfaces of the first rotating sleeve and the second rotating sleeve are provided with drilling lines; the rotating frame is internally provided with a sliding groove, and the sliding frame is symmetrically and slidably arranged in the sliding groove;
The first motor is fixedly arranged at one end of the lifting transmission mechanism, and the output end of the first motor is fixedly connected with one end of the rotating rod and used for driving the rotating rod to rotate;
the reaming adjustment assembly includes: the threaded rod is in threaded connection with one end of the rotating rod, and one end of the threaded rod, which is far away from the rotating rod, is provided with an installation end head;
One end of the movable sleeve is rotatably arranged on the mounting end, and a plurality of first connecting frames are arranged on the movable sleeve;
the adjusting seats are provided with a plurality of adjusting seats which are in sliding connection with the first rotating sleeve, a second connecting frame is arranged on one side, close to the movable sleeve, of the adjusting seats, the sliding frame is arranged at one end of the adjusting seats, and a plurality of reaming nails are arranged on one side, far away from the movable sleeve, of the adjusting seats;
The connecting strips are provided with a plurality of connecting strips, and two ends of each connecting strip are respectively and movably connected with the first connecting frame and the second connecting frame.
2. The reamer for geological exploration of claim 1, wherein said elevating transmission comprises:
the lifting seat is connected with the rotary reaming assembly and is used for driving the rotary reaming assembly to lift and ream;
The hydraulic rods are arranged in a plurality, the hydraulic rods are fixedly arranged on the supporting frame, and the output ends of the hydraulic rods are connected with the lifting seat and used for driving the lifting seat to lift.
3. The reamer for geological exploration of claim 1, further comprising: the movable supporting mechanism is arranged at one end, far away from the supporting frame, of the supporting legs and is used for movably supporting the supporting legs.
4. A reamer for geological exploration according to claim 3, wherein said movable supporting mechanism comprises:
the support seats are arranged at one end, far away from the support frame, of the support legs;
the universal wheels are arranged at one side of the supporting seat; the fixed nails are arranged in a plurality of mode, and the fixed nails are movably mounted on the supporting seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111503475.9A CN114135231B (en) | 2021-12-10 | 2021-12-10 | Reamer for geological exploration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111503475.9A CN114135231B (en) | 2021-12-10 | 2021-12-10 | Reamer for geological exploration |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114135231A CN114135231A (en) | 2022-03-04 |
| CN114135231B true CN114135231B (en) | 2024-04-19 |
Family
ID=80385890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111503475.9A Active CN114135231B (en) | 2021-12-10 | 2021-12-10 | Reamer for geological exploration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114135231B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115012827B (en) * | 2022-05-17 | 2023-03-21 | 西安卓力科技发展有限公司 | Pile foundation well reaming device |
| CN115199211B (en) * | 2022-07-26 | 2023-05-30 | 华能云南滇东能源有限责任公司 | Reaming device for underground coal mine geological exploration |
| CN116427853B (en) * | 2023-04-19 | 2024-01-09 | 河北省地质矿产勘查开发局第一地质大队(河北省清洁能源应用技术中心) | Drilling and reaming device and method suitable for gravel stratum |
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| KR101942691B1 (en) * | 2018-12-14 | 2019-04-11 | 문형록 | Expansion Bit Device for Drilling and Construction Method of Excavation Using Thereof |
| CN210714469U (en) * | 2019-11-07 | 2020-06-09 | 六盘水师范学院 | Mining exploration reaming device |
| CN111608588A (en) * | 2020-06-15 | 2020-09-01 | 张航 | Geological exploration is along with boring reaming device |
| CN111946259A (en) * | 2020-08-14 | 2020-11-17 | 江苏省岩土工程勘察设计研究院 | Method for forming hole of cast-in-situ bored pile |
| CN213116153U (en) * | 2020-07-30 | 2021-05-04 | 李胜 | Reamer for geological exploration |
| CN113561039A (en) * | 2021-09-27 | 2021-10-29 | 大隆节能液压科技启东有限公司 | Polishing device for inner wall surface of metal pipe joint |
-
2021
- 2021-12-10 CN CN202111503475.9A patent/CN114135231B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101942691B1 (en) * | 2018-12-14 | 2019-04-11 | 문형록 | Expansion Bit Device for Drilling and Construction Method of Excavation Using Thereof |
| CN210714469U (en) * | 2019-11-07 | 2020-06-09 | 六盘水师范学院 | Mining exploration reaming device |
| CN111608588A (en) * | 2020-06-15 | 2020-09-01 | 张航 | Geological exploration is along with boring reaming device |
| CN213116153U (en) * | 2020-07-30 | 2021-05-04 | 李胜 | Reamer for geological exploration |
| CN111946259A (en) * | 2020-08-14 | 2020-11-17 | 江苏省岩土工程勘察设计研究院 | Method for forming hole of cast-in-situ bored pile |
| CN113561039A (en) * | 2021-09-27 | 2021-10-29 | 大隆节能液压科技启东有限公司 | Polishing device for inner wall surface of metal pipe joint |
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| Publication number | Publication date |
|---|---|
| CN114135231A (en) | 2022-03-04 |
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