CN107023267B - Automatic replacing device for drill rod of pile machine - Google Patents
Automatic replacing device for drill rod of pile machine Download PDFInfo
- Publication number
- CN107023267B CN107023267B CN201610075871.9A CN201610075871A CN107023267B CN 107023267 B CN107023267 B CN 107023267B CN 201610075871 A CN201610075871 A CN 201610075871A CN 107023267 B CN107023267 B CN 107023267B
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- drill rod
- pile frame
- pile
- automatic
- drill
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- 238000005553 drilling Methods 0.000 claims abstract description 47
- 230000007246 mechanism Effects 0.000 claims description 52
- 239000011440 grout Substances 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 6
- 239000002689 soil Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- 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
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/18—Connecting or disconnecting drill bit and drilling pipe
-
- 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
- E21B15/00—Supports for the drilling machine, e.g. derricks or masts
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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)
- Earth Drilling (AREA)
Abstract
The invention relates to an automatic replacing device for a drill rod of a pile machine, which comprises a main pile frame and a power head, wherein a driving device for driving the power head to ascend and descend is connected to the power head; grouting device downside is provided with the automatic disassembly body of drilling rod, and the automatic disassembly body of drilling rod is connected with the drilling rod is detachable of setting in the main pile frame, and main pile frame one side still is provided with reserve pile frame group, and reserve pile frame group is provided with X axle drilling rod conveyor including middle reserve pile frame and a plurality of avris reserve pile frame on the reserve pile frame in the middle, is provided with Y axle drilling rod conveyor on a plurality of avris reserve pile frames. The automatic replacing device for the drill rod of the pile machine can automatically transfer the drill rod at the standby position to the position of the main pile frame for automatic installation, can save a large amount of installation time, and improves the working efficiency of the pile machine.
Description
Technical Field
The invention relates to an automatic replacing device for a drill rod of a pile machine, and belongs to the technical field of construction equipment and tools.
Background
The pile machine is a pile made by forming a pile hole in foundation soil through mechanical drilling, steel pipe soil extrusion or manual excavation and the like on an engineering site, placing a reinforcement cage and pouring concrete in the pile hole, and according to different hole forming methods, the poured pile can be divided into a immersed tube poured pile, a drilled hole poured pile, a hole-digging poured pile and the like. Because stake machine makes the length that needs continuous continuation drill rod in drilling to squeeze into deeper hole on subaerial, traditional stake machine makes needs manual operation in continuation or changing the drill rod, and its work efficiency is lower, makes some stake machines of drilling with the drill rod group very much, and its drill rod group quality is great, and it is comparatively troublesome that the manual change is changed, and drilling efficiency is lower, and needs consume more human cost.
Disclosure of Invention
The invention aims to solve the technical problems of complex manual replacement, low efficiency, high cost and the like of the traditional pile machine, and further provides an automatic replacement device for a drill rod of the pile machine.
The technical scheme adopted by the invention for solving the technical problems is as follows:
an automatic replacing device for a drill rod of a pile machine comprises a main pile frame, wherein a power head is arranged at the upper end of the main pile frame, a driving device for driving the power head to ascend and descend is connected onto the power head, a grouting plate is connected to the lower end of the power head, the grouting plate is connected with a grouting device to convey grout into the drill rod, and the drill rod is connected with the power head through a universal joint; grouting device downside is provided with the automatic disassembly body of drilling rod, the automatic disassembly body of drilling rod is in with the setting the detachable connection of drilling rod in the main pile frame, main pile frame one side still is provided with reserve pile frame group, reserve pile frame group include with the main pile frame aligns the middle reserve pile frame that sets up with a plurality of avris reserve pile frames that middle reserve pile frame both sides set up side by side, be provided with on the middle reserve pile frame with the drilling rod group in the middle reserve pile frame is carried X axle drilling rod conveyor in the main pile frame, be provided with on a plurality of avris reserve pile frames with drilling rod group carries in the avris reserve pile frame Y axle drilling rod conveyor in the middle reserve pile frame.
Preferably, automatic disassembly body of drilling rod include with the octagonal sleeve of the coaxial setting of drilling rod, octagonal sleeve fixes on the angle lagging, be provided with one at least on the angle lagging and be used for the drive the ejection mechanism of angle lagging downstream, ejection mechanism's the vertical upwards setting of ejection end, the end connection of ejection end is on the downside of grouting plate, ejection mechanism drive octagonal sleeve downstream makes octagonal sleeve contradict and push down so that the drilling rod cover of drilling rod upper end the universal joint with the drilling rod rotates the dismantlement.
Preferably, a lower drilling automatic dismounting structure is arranged at the position of the lowest pile driving point of the lower section of the main pile frame.
Preferably the automatic disassembly body that drills down includes and is used for with the drilling rod cover of drilling rod upper end pushes down the pressure fork, press the fork to articulate on the main pile frame, the one end of keeping away from of pressure fork is connected with the drive the pressure fork pushes down the drilling rod cover or makes the pressure fork rotates extremely the pressure fork cylinder outside the vertical projection area of unit head, the pressure fork cylinder is fixed on the main pile frame.
The side spare pile frame comprises a left spare pile frame and a right spare pile frame which are respectively arranged on the left side and the right side of the middle spare pile frame, a left drill rod clamping mechanism for clamping a left spare drill rod is arranged at the upper end of the left spare pile frame, and the upper end of the left drill rod clamping mechanism is fixed on the left Y-axis drill rod conveying device; the upper end of the right spare pile frame is provided with a right drill rod clamping mechanism for clamping a right spare drill rod, and the upper end of the right drill rod clamping mechanism is fixed on the right Y-axis drill rod conveying device; the left Y-axis drill rod conveying device and the right Y-axis drill rod conveying device are both arranged on the Y-axis conveying guide rail.
Preferably, the lower end of the X-axis drill rod conveying device is connected with an intermediate drill rod clamping mechanism, an intermediate drill rod fixing mechanism is arranged below the intermediate drill rod clamping mechanism, and the standby drill rods conveyed from the side standby pile frames are fixed by the intermediate drill rod fixing mechanism and then clamped by the intermediate drill rod clamping mechanism.
Preferably, the main pile frame is provided with a main clamping part for clamping and fixing the conveyed standby drill rod.
Preferably, the main clamping part comprises two clamping parts which are horizontally arranged and can move towards each other so as to clamp and fix the drill rod to be installed from two sides of the drill rod to be installed.
Preferably, a limiting plate for limiting the power head to descend is horizontally arranged below the highest point of the power head, and the limiting plate is suitable for horizontally moving into or out of a vertical projection area of the power head.
Preferably, the main pile frame and the spare pile frame group are of a lattice type integrated structure. .
The invention has the beneficial effects that: the automatic replacing device for the drill rod of the pile machine can automatically transfer the drill rod of the standby position to the position of the main pile frame and realize automatic installation, thereby saving a large amount of installation time, saving labor cost and improving the working efficiency of the pile machine
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic structural view in elevation of an automatic replacement device for a drill rod of a pile machine of the present invention after being assembled with the pile machine;
FIG. 2 is a left side view structural schematic diagram of the automatic replacement device for the drill rod of the pile machine of the present invention after being assembled with the pile machine;
FIG. 3 is a schematic view of a top view structure of the automatic replacement device for the drill rod of the pile driver and the pile driver after the device is assembled.
The labels in the figure are: 10-main pile frame, 11-power head, 12-grouting plate, 13-drill rod, 14-universal joint, 15-drill rod automatic disassembling mechanism, 16-spare pile frame group, 17-middle spare pile frame, 18-left spare pile frame, 19-right spare pile frame, 20-X-axis drill rod conveying device, 21-octagonal sleeve, 22-angle sleeve plate, 23-ejection mechanism, 24-drill rod sleeve, 25-down-drilling automatic disassembling mechanism, 26-press fork, 27-press fork air cylinder, 28-left drill rod clamping mechanism, 29-left Y-axis drill rod conveying device, 30-right drill rod clamping mechanism, 31-right Y-axis drill rod conveying device, 32-Y-axis conveying guide rail, 33-middle drill rod clamping mechanism and 34-middle drill rod fixing mechanism.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
The automatic replacing device for the drill rod of the pile machine, disclosed by the invention, comprises a main pile frame 10, wherein a power head 11 is arranged at the upper end of the main pile frame 10, a driving device for driving the power head 11 to ascend and descend is connected to the power head 11, a grouting plate 12 is connected to the lower end of the power head 11, the grouting plate 12 is connected with a grouting device to convey grout into a drill rod 13, and the drill rod 13 is connected with the power head 11 through a universal joint 14; an automatic drill rod dismounting mechanism 15 is arranged on the lower side of the grouting device, the automatic drill rod dismounting mechanism 15 is detachably connected with a drill rod arranged in the main pile frame 10, the drill rod in the main pile frame 10 is a drill rod group arranged in a 3 x 3 matrix, a spare pile frame group 16 is further arranged on one side of the main pile frame 10, the spare pile frame group 16 comprises a middle spare pile frame 17 aligned with the main pile frame 10, a left spare pile frame 18 and a right spare pile frame 19 on two sides of the middle spare pile frame 17, and the spare pile frame 17 can be provided with other side spare pile frames according to needs; be provided with on the middle backup pile frame 17 will the drilling rod group in the middle backup pile frame 17 carries X axle drilling rod conveyor 20 in the main pile frame 10, be provided with on the avris backup pile frame will the drilling rod group carries in the avris backup pile frame Y axle drilling rod conveyor in the middle backup pile frame. The automatic replacing device for the drill rod of the pile machine can automatically transfer the drill rod of the standby position to the position of the main pile frame, can realize automatic installation, further save a large amount of installation time, save labor cost and improve the working efficiency of the pile machine.
In this embodiment, the automatic drill rod dismounting mechanism 15 includes an octagonal sleeve 21 coaxially disposed with the drill rod, the octagonal sleeve 21 is fixed on an angle sleeve plate 22, at least one ejection mechanism 23 for driving the angle sleeve plate 22 to move downward is disposed on the angle sleeve plate 22, the ejection mechanism 23 may be an air cylinder or an oil cylinder, and preferably two ejection mechanisms 23 are disposed and symmetrically disposed on two sides of the angle sleeve plate; the vertical upwards setting of ejection mechanism 23's ejecting end, the end connection of ejecting end is on the downside of grouting plate 12, ejection mechanism 23 drive eight corner cover 22 downstream makes eight corner cover 22 conflict and the drilling rod cover 24 of drilling rod upper end is pushed down so that universal joint 14 with the drilling rod rotates the dismantlement, also promptly eight corner cover 22 drives earlier the drilling rod cover 24 descends the certain distance and makes the drilling rod cover break away from the universal joint, then the upset of unit head drive universal joint makes universal joint and drilling rod separation, and then realizes the automatic drilling rod of dismantling.
In this embodiment, a lower drilling automatic dismounting structure 25 is disposed at a position, where a lower section of the main pile frame 10 is located at a lowest drilling point (where the lowest drilling point refers to a position where the power head starts to lengthen the drill rod when running), the lower drilling automatic dismounting mechanism 25 includes a pressing fork 26 for pressing the drill rod sleeve 24 at the upper end of the drill rod, the pressing fork 26 is hinged to the main pile frame 10, one end of the pressing fork 26, which is far away from the drill rod, is connected with a driving unit for driving the pressing fork 26 to press the drill rod sleeve 24 or make the pressing fork 26 rotate to a pressing fork cylinder 27 outside a vertical projection area of the power head 11, and the pressing fork cylinder 27 is fixed to the main pile frame 10. The pressure fork cylinder 27 drives the pressure fork 26 to press down the drill rod sleeve 24, so that the drill rod sleeve 24 is separated from the universal joint 14, the power head 11 drives the universal joint 14 to rotate reversely, so that the universal joint 14 is separated from a drill rod, then the power head moves upwards to the top end, and the drill rod is taken out from the spare pile frame group to lengthen the drill rod which is driven into the ground.
In this embodiment, the upper end of the left spare pile frame 18 is provided with a left drill rod clamping mechanism 28 for clamping a left spare drill rod, and the upper end of the left drill rod clamping mechanism 28 is fixed on a left Y-axis drill rod conveying device 29; the upper end of the right spare pile frame 19 is provided with a right drill rod clamping mechanism 30 for clamping a right spare drill rod, and the upper end of the right drill rod clamping mechanism 30 is fixed on a right Y-axis drill rod conveying device 31; the left Y-axis drill rod conveying device 29 and the right Y-axis drill rod conveying device 31 are arranged on a Y-axis conveying guide rail 32.
In this embodiment, the lower end of the X-axis drill rod conveying device 20 is connected with an intermediate drill rod clamping mechanism 33, an intermediate drill rod fixing mechanism 34 is arranged below the intermediate drill rod clamping mechanism 33, and the spare drill rods conveyed from the side spare pile frames (left spare pile frame or right spare pile frame) are fixed by the intermediate drill rod fixing mechanism 34, then clamped by the intermediate drill rod clamping mechanism 33, and finally conveyed into the main pile frame through the X-axis drill rod conveying device 20 to lengthen the drill rods.
In this embodiment, the main pile frame 10 is provided with a main clamping portion for clamping and fixing the conveyed spare drill rod, the main clamping portion firstly clamps and fixes the spare drill rod, then the power head and the universal joint move down and are connected with the upper end of the spare drill rod first, then the main clamping portion releases the spare drill rod, the power head drives the spare drill rod to descend to be connected with the drill rod which is drilled into the ground, and further the extension of the drill rod is completed. The main clamping part comprises two clamping parts which are horizontally arranged and can move oppositely so as to clamp and fix the drill rod to be installed from two sides of the drill rod to be installed (the drill rod to be installed is a standby drill rod which moves into the main pile frame). The specific structural form of the main clamping part is not limited as long as the spare drill rod can be effectively clamped.
In this embodiment, a limiting plate for limiting the descending of the power head 11 is horizontally arranged below the highest point of the power head 11, and the limiting plate is suitable for being horizontally moved into or out of the vertical projection area of the power head 11. When the standby drill rod is moved to the position right below the vertical projection area of the power head 11, the limiting plate prevents the power head from descending, and after the standby drill rod is moved to the main pile frame in a horizontal moving mode, the limiting plate moves out of the vertical projection area of the power head 11, so that the power head descends and is connected with the upper end of the standby drill rod.
In this embodiment, the main pile frame 10 and the spare pile frame set 16 are a lattice-type integrated structure, which is convenient for assembly and can achieve the desired supporting strength and stability.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the contents of the specification, and must be determined by the scope of the claims.
Claims (11)
1. The automatic replacing device for the drill rod of the pile machine is characterized by comprising a main pile frame, wherein a power head is arranged at the upper end of the main pile frame, a driving device for driving the power head to ascend and descend is connected onto the power head, a grouting plate is connected to the lower end of the power head, the grouting plate is connected with a grouting device to convey grout into the drill rod, and the drill rod is connected with the power head through a universal joint; grouting device downside is provided with the automatic disassembly body of drilling rod, the automatic disassembly body of drilling rod is in with the setting the detachable connection of drilling rod in the main pile frame, drilling rod in the main pile frame is the drill rod group of matrix arrangement, main pile frame one side still is provided with reserve pile frame group, reserve pile frame group include with the main pile frame aligns the middle reserve pile frame that sets up with a plurality of avris reserve pile frames that middle reserve pile frame both sides set up side by side, be provided with on the middle reserve pile frame with drill rod group in the middle reserve pile frame carries X axle drilling rod conveyor in the main pile frame, be provided with on a plurality of avris reserve pile frames with drill rod group carries in the avris reserve pile frame Y axle drilling rod conveyor in the middle reserve pile frame.
2. The automatic replacing device for the drill rod of the pile machine as claimed in claim 1, wherein the automatic drill rod disassembling mechanism comprises an octagonal sleeve coaxially arranged with the drill rod, the octagonal sleeve is fixed on an angle sleeve plate, at least one ejection mechanism for driving the angle sleeve plate to move downwards is arranged on the angle sleeve plate, an ejection end of the ejection mechanism is vertically arranged upwards, an end part of the ejection end is connected to the lower side surface of a grouting plate, and the ejection mechanism drives the octagonal sleeve to move downwards, so that the octagonal sleeve is abutted against and presses the drill rod sleeve at the upper end of the drill rod downwards to facilitate the rotary disassembly of the universal joint and the drill rod.
3. The automatic drill pipe replacing device for the pile machine as claimed in claim 2, wherein the lower section of the main pile frame at the lowest pile driving point is provided with a drill-down automatic dismounting structure.
4. The automatic drill rod replacing device for the pile machine as claimed in claim 3, wherein the automatic drill pipe removing mechanism comprises a pressing fork for pressing down the drill pipe sleeve at the upper end of the drill pipe, the pressing fork is hinged on the main pile frame, one end of the pressing fork, which is far away from the drill pipe, is connected with a pressing fork cylinder for driving the pressing fork to press down the drill pipe sleeve or enabling the pressing fork to rotate to the outside of the vertical projection area of the power head, and the pressing fork cylinder is fixed on the main pile frame.
5. The automatic replacing device for the drill rod of the pile machine as claimed in claim 1, wherein the side backup pile frame comprises a left backup pile frame and a right backup pile frame which are respectively arranged at the left side and the right side of the middle backup pile frame, the upper end of the left backup pile frame is provided with a left drill rod clamping mechanism for clamping a left backup drill rod, and the upper end of the left drill rod clamping mechanism is fixed on the left Y-axis drill rod conveying device; the upper end of the right spare pile frame is provided with a right drill rod clamping mechanism for clamping a right spare drill rod, and the upper end of the right drill rod clamping mechanism is fixed on the right Y-axis drill rod conveying device; the left Y-axis drill rod conveying device and the right Y-axis drill rod conveying device are both arranged on the Y-axis conveying guide rail.
6. The automatic replacing device for the drill rod of the pile machine as claimed in claim 1, wherein the lower end of the X-axis drill rod conveying device is connected with an intermediate drill rod clamping mechanism, an intermediate drill rod fixing mechanism is arranged below the intermediate drill rod clamping mechanism, and the spare drill rod conveyed from the side spare pile frame is fixed by the intermediate drill rod fixing mechanism and then clamped by the intermediate drill rod clamping mechanism.
7. The automatic drill rod replacing device for the pile machine as claimed in claim 6, wherein the main pile frame is provided with a main clamping part for clamping and fixing the conveyed spare drill rod.
8. The automatic replacement device for the drill rod of the pile machine as claimed in claim 7, wherein the main clamping part comprises two clamping parts which are horizontally arranged and can move towards each other to clamp and fix the drill rod to be installed from two sides of the drill rod to be installed.
9. The automatic replacement device for the drill rod of the pile machine as claimed in claim 1, wherein a limiting plate for limiting the power head to descend is horizontally arranged below the highest point of the power head, and the limiting plate is suitable for being horizontally moved into or out of a vertical projection area of the power head.
10. The automatic drill rod replacing device for the pile driver as claimed in claim 1, wherein the main pile frame and the spare pile frame group are of a lattice type integrated structure.
11. The automatic drill pipe replacing device for the pile machine as claimed in claim 1, wherein the lower section of the main pile frame at the lowest pile driving point is provided with an automatic drill-down disassembling mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610075871.9A CN107023267B (en) | 2016-02-01 | 2016-02-01 | Automatic replacing device for drill rod of pile machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610075871.9A CN107023267B (en) | 2016-02-01 | 2016-02-01 | Automatic replacing device for drill rod of pile machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107023267A CN107023267A (en) | 2017-08-08 |
| CN107023267B true CN107023267B (en) | 2020-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610075871.9A Active CN107023267B (en) | 2016-02-01 | 2016-02-01 | Automatic replacing device for drill rod of pile machine |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1419258A (en) * | 1971-12-15 | 1975-12-24 | Rudolf Hausherr Soehne Kg Masc | Automatic ground drilling apparatus |
| CN1749526A (en) * | 2004-09-18 | 2006-03-22 | 鲍尔机器厂有限责任公司克莱姆钻孔技术分厂 | Drilling rig with a tool cartridge |
| CN102359346A (en) * | 2011-10-10 | 2012-02-22 | 浙江大学 | Lunar soil deep drilling sample recycling mechanism |
| CN104453743A (en) * | 2013-09-24 | 2015-03-25 | 海瑞克顶点有限公司 | Conveying device for drill pipes of a deep hole drilling device |
| CN105019456A (en) * | 2015-07-31 | 2015-11-04 | 周兆弟 | Pile driving frame of comprehensive pile driver |
| CN105544509A (en) * | 2016-01-30 | 2016-05-04 | 周兆弟 | Drill stem dismounting and mounting device of pile driver |
| CN205532394U (en) * | 2016-02-01 | 2016-08-31 | 周兆弟 | Stake machine drill pole automatic exchange device |
-
2016
- 2016-02-01 CN CN201610075871.9A patent/CN107023267B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1419258A (en) * | 1971-12-15 | 1975-12-24 | Rudolf Hausherr Soehne Kg Masc | Automatic ground drilling apparatus |
| CN1749526A (en) * | 2004-09-18 | 2006-03-22 | 鲍尔机器厂有限责任公司克莱姆钻孔技术分厂 | Drilling rig with a tool cartridge |
| CN102359346A (en) * | 2011-10-10 | 2012-02-22 | 浙江大学 | Lunar soil deep drilling sample recycling mechanism |
| CN104453743A (en) * | 2013-09-24 | 2015-03-25 | 海瑞克顶点有限公司 | Conveying device for drill pipes of a deep hole drilling device |
| CN105019456A (en) * | 2015-07-31 | 2015-11-04 | 周兆弟 | Pile driving frame of comprehensive pile driver |
| CN105544509A (en) * | 2016-01-30 | 2016-05-04 | 周兆弟 | Drill stem dismounting and mounting device of pile driver |
| CN205532394U (en) * | 2016-02-01 | 2016-08-31 | 周兆弟 | Stake machine drill pole automatic exchange device |
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| CN107023267A (en) | 2017-08-08 |
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