CN114809926A - Telescopic hydraulic square pile drill bit - Google Patents
Telescopic hydraulic square pile drill bit Download PDFInfo
- Publication number
- CN114809926A CN114809926A CN202210479517.8A CN202210479517A CN114809926A CN 114809926 A CN114809926 A CN 114809926A CN 202210479517 A CN202210479517 A CN 202210479517A CN 114809926 A CN114809926 A CN 114809926A
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- square pile
- cantilever
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- 239000003638 chemical reducing agent Substances 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 9
- 239000010437 gem Substances 0.000 claims description 6
- 229910001751 gemstone Inorganic materials 0.000 claims description 6
- 238000005728 strengthening Methods 0.000 claims description 4
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 2
- 238000005553 drilling Methods 0.000 abstract description 23
- 238000009412 basement excavation Methods 0.000 abstract description 9
- 239000000725 suspension Substances 0.000 abstract 3
- 239000003921 oil Substances 0.000 description 79
- 238000005096 rolling process Methods 0.000 description 18
- 239000010720 hydraulic oil Substances 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 230000001360 synchronised effect Effects 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
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- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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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
- E21B10/00—Drill bits
- E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
- E21B10/43—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
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- 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
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/02—Fluid rotary type drives
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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 belongs to the technical field of rotary drilling rigs, in particular to a telescopic hydraulic square pile drill bit which comprises a box body, a cantilever and an oil pipe reeler, a connecting square head is arranged above the box body, a box body central hole and a box body fixed pin hole are arranged on the body of the box body, the suspension arm comprises a swing rod, a suspension arm center hole and a suspension arm fixed pin hole are arranged on the body of the swing rod, the central hole of the cantilever is aligned with the central hole of the box body, the fixed pin hole of the cantilever is corresponding to the fixed pin hole of the box body, the lower part of the swing rod is connected with a mounting plate, the front side and the rear side of the mounting plate are both provided with an excavating assembly, the excavation assembly comprises an excavation wheel body and a hydraulic motor for driving the excavation wheel body to rotate, and the square pile drill bit does not need to be provided with rotation power by a rotary drilling rig any more, and the operation square head of the rotary drilling rig only needs to play a role in mounting and supporting the square pile drill bit, so that the square pile drill bit can be connected more firmly.
Description
Technical Field
The invention relates to the technical field of rotary drilling rigs, in particular to a telescopic hydraulic square pile drill bit.
Background
The rotary drilling rig is a construction machine suitable for pore-forming operations of bridge piles of traffic facilities such as various highways, railways and the like, large-scale buildings, load-bearing structure piles of ports and wharfs, viaduct bridge piles in cities and the like. The method is mainly widely applied to the construction of soil layers such as sandy soil, cohesive soil, silty soil and the like. The drilling machine generally adopts a hydraulic crawler type telescopic chassis, a self-lifting foldable drilling mast and a telescopic drill rod, has the functions of automatic detection and adjustment of verticality, digital display of hole depth and the like, generally adopts hydraulic pilot control and load sensing for complete machine operation, and has the characteristics of light and comfortable operation and the like.
The rotary drilling rig is operated by rotating the square pile drill bit, namely, the operation square head of the rotary drilling rig not only needs to play a role in mounting and supporting the whole square pile drill bit, but also needs to provide mechanical rotation power for the square pile drill bit, so that the safety of equipment is deteriorated; in addition, a cantilever in a square pile drill bit is fixed, so that one rotary drilling rig can only drill for one drilling size, and the use range of the rotary drilling rig is limited.
Disclosure of Invention
The invention aims to provide a telescopic hydraulic square pile drill bit, and aims to solve the problem that the existing square pile drill bit and a rotary drilling rig are not stably connected.
In order to achieve the purpose, the invention provides the following technical scheme: telescopic hydraulic square pile drill bit, including box, cantilever and oil pipe reelpipe ware, the top of box is provided with the connection square head, seted up box centre bore and box on the body of box and decided the pinhole, the cantilever includes the pendulum rod, set up cantilever centre bore and cantilever on the body of pendulum rod, cantilever centre bore aligns with the box centre bore, cantilever decides the pinhole and decides the pinhole with the box and corresponds, the below of pendulum rod is connected with the mounting panel, the front and back side of mounting panel all installs the excavation assembly, the excavation assembly includes excavate the wheel body and drive and excavate the hydraulic motor of wheel body pivoted, the pivot outside of hydraulic motor is provided with the speed reducer, the outside of excavating the wheel body is provided with the stereoplasm arch, hydro-cylinder shunt motor and oil return collector are installed to the top of box, the oil inlet of hydraulic motor passes through the pipeline and is connected with hydro-cylinder shunt motor, and an oil outlet of the hydraulic motor is connected with an oil return collector through a pipeline.
Preferably, the top of box is provided with the box strengthening rib, be provided with the rectangle cavity between box strengthening rib and the connection square head, hydro-cylinder reposition of redundant personnel motor and oil return collector all are located the inboard of rectangle cavity.
Preferably, an oil pipe inlet and an oil pipe outlet are formed in the body of the mounting plate, and pipelines connected with the oil cylinder shunt motor penetrate through the oil pipe inlet and the oil pipe outlet.
Preferably, one side of the excavating wheel body, which is far away from the hydraulic motor, is provided with a detachable jewel cutter.
Preferably, the oil pipe reelpipe ware includes the support, install the reelpipe case on the body of support, the body outside activity cover of reelpipe case is equipped with a reelpipe section of thick bamboo, be provided with the oil pipe interface on the body of reelpipe section of thick bamboo, oil cylinder reposition of redundant personnel motor and oil return collector are respectively through pipeline and oil pipe interface connection.
Preferably, an annular groove is formed in the outer side of the body of the reel pipe valve core, an oil guide hole communicated with the annular groove is formed in the body of the reel pipe valve core in the transverse direction, and the annular groove is communicated with the oil pipe connector.
Preferably, the left side and the right side of the inner cavity of the reel pipe barrel are both provided with sealing elements, the inner side and the outer side of each sealing element are respectively attached to the reel pipe barrel and the reel pipe valve core, and the annular groove is located between the sealing elements on the two sides.
Preferably, a driving device for driving the pipe coiling cylinder to rotate is installed on the outer side of the support.
Compared with the prior art, the invention has the beneficial effects that:
1) the square pile drill bit of the device is directly provided with rotary power by the hydraulic motor, and the square pile drill bit does not need a rotary drilling rig to provide rotary power any more, so that the operation square head of the rotary drilling rig only needs to play a role in mounting and supporting the square pile drill bit, and the square pile drill bit can be connected more firmly;
2) according to different working conditions, parameters of a hydraulic system can be adjusted in a targeted manner, adjustment of the rotating speed and the torque of an excavating execution component is realized, the energy consumption allowance of the corresponding required work is smaller, useless energy consumption is lower, and accordingly the purpose of green and low carbon is realized;
3) the excavation execution part of the square pile drill bit is installed on the cantilever, the cantilever can swing along the center hole of the box body, and after the cantilever swings to a required angle, the cantilever can swing through the box body fixing pin hole to be positioned by a swing angle, so that one device can excavate a plurality of excavation sizes, and the square pile drill bit is multipurpose.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic front view of the present invention;
FIG. 3 is a schematic cross-sectional view taken along line B-B of FIG. 2 according to the present invention;
FIG. 4 is a schematic sectional view taken along line A-A of FIG. 2 according to the present invention;
FIG. 5 is a schematic structural diagram of the case of the present invention;
FIG. 6 is a schematic view of a cantilever structure according to the present invention;
FIG. 7 is a right side view cross-sectional structural schematic of the excavation assembly of the present disclosure;
FIG. 8 is a schematic view of the tubing reel in elevation according to the present invention;
FIG. 9 is a schematic cross-sectional view taken along line P-P of FIG. 8 according to the present invention;
fig. 10 is a schematic view of an oil circuit system according to the present invention.
In the figure: 10 boxes, 11 box fixed pin holes, 12 box central holes, 13 rectangular cavities, 14 connecting square heads, 15 box reinforcing ribs, 20 cantilevers, 21 mounting plates, 22 oil pipe inlets and outlets, 23 swing rods, 24 cantilever fixed pin holes, 25 cantilever central holes, 30 excavating assemblies, 31 hydraulic motors, 32 speed reducers, 33 hard protrusions, 34 jewel cutters, 40 oil cylinder shunt motors, 50 oil return collectors, 60 oil pipe reelers, 61 supports, 62 reel valve cores, 63 oil guide holes, 64 reel pipes, 65 oil pipe interfaces, 66 driving devices, 67 sealing elements and 68 annular grooves.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Example (b):
referring to fig. 1-10, the present invention provides a technical solution: the telescopic hydraulic square pile drill bit comprises a box body 10, a cantilever 20 and an oil pipe coiling device 60, wherein the box body 10 is used as a framework of the whole square pile drill bit, a connecting square head 14 is welded above the box body 10, the connecting square head 14 is connected with an operation square head of a rotary drilling rig, so that the whole square pile drill bit can be installed and fixed, box body reinforcing ribs 15 are arranged above the box body 10, the box body reinforcing ribs 15 can reinforce the integral strength of the box body 10, and after the box body reinforcing ribs 15 are connected with each other, rectangular cavities 13 can be enclosed between the connecting square head 14, the number of the rectangular cavities 13 is two, the two rectangular cavities 13 are respectively positioned at the left side and the right side of the connecting square head 14, an oil cylinder shunt motor 40 and an oil return collector 50 are respectively arranged on the two rectangular cavities 13, the rectangular cavities 13 can be sealed in the later stage, so that dust is prevented from entering the rectangular cavities 13, a box body central hole 12 and a box body fixing pin hole 11 are formed in the body of the box body 10, the cantilever 20 connected with the box body 10 can swing along the box body central hole 12, and the cantilever 20 can be fixed by inserting a positioning pin into the box body positioning pin hole 11;
the device comprises two cantilevers 20, each cantilever 20 comprises a swing rod 23, a cantilever central hole 25 and a cantilever fixed pin hole 24 are formed in the body of each swing rod 23, the cantilever central holes 25 and the cantilever fixed pin holes 24 are connected with a box body central hole 12 and a box body fixed pin hole 11 of a box body 10 through positioning pins, the number of the box body fixed pin holes 11 is multiple, the cantilevers 20 can be selectively connected with different box body fixed pin holes 11, the rotation and self-adjustment fixing and positioning of the cantilevers 20 are further realized, an installation plate 21 is connected below each swing rod 23, and excavating assemblies 30 are installed on the front side and the rear side of each installation plate 21;
the excavating assembly 30 comprises an excavating wheel body 35, the excavating wheel body 35 is provided with a hard protrusion 33 on the outer side;
the excavator walking assembly is a walking device integrating a motor and a speed reducer, and consists of a double-displacement axial plunger motor and a walking speed reducer which are integrated in the speed reducer 32, wherein the axial plunger motor is a hydraulic motor 31, the hydraulic motor 31 is internally provided with an anti-reversal valve, a parking brake device and a high-low two-gear conversion device, the hydraulic motor 31 has the characteristics of large transmission ratio range, compact structure, high working efficiency, strong reliability, small volume, stable operation, low noise and the like, and simultaneously has the advantages of multi-stage safety protection, long service life and the like;
the main function of the oil cylinder shunt motor 40 is to distribute flow to the oil pumps in a plurality of oil ways in a balanced manner, so that a large hydraulic lifting system can lift simultaneously, the oil cylinder shunt motor 40 selects a YM gear synchronous shunt motor which is suitable for vehicle detection systems, agricultural mechanical equipment, large stage lifting, elevators, large steel structures, tunnel bridges, precise lubricating systems, hydraulic lifting platforms and the like, and in the material processing and mechanical equipment industry, a stable synchronous lifting scheme can be provided, so that a plurality of hydraulic oil cylinders or hydraulic lifting platforms have the effect of synchronous lifting, the functions are mature, and the application and verification are obtained in multiple occasions;
the rotary drilling rig is connected with a main oil inlet pipe to an oil cylinder shunt motor 40, four paths of hydraulic oil with equal oil pressure are respectively shunted by the oil cylinder shunt motor 40 and are respectively led to oil inlets of each hydraulic motor 31, the number of the oil return collectors 50 is two, oil return pipelines of the hydraulic motors 31 are converged to one oil return collector 50, oil paths of overflow valve holes of the hydraulic motors 31 are converged to the other oil return collector 50, and then the hydraulic oil flows back to the rotary drilling rig through the two oil return collectors 50 through two oil return pipes;
the square pile drill bit is characterized in that high-pressure hydraulic oil is obtained from the rotary drilling rig, an oil pipe is connected to each component on the square pile drill bit from the rotary drilling rig, a machined square pile hole is usually very deep (30-50 meters), the oil pipe is very long, the oil pipe needs to be retracted along with the lifting of the square pile drill bit, an oil pipe coiling device 60 is configured, the oil pipe coiling device 60 and the oil pipe are large in total weight, the oil pipe can be installed on a large frame behind a cockpit of the rotary drilling rig, the oil pipe can be retracted smoothly, transition wheels can be arranged on the rotary drilling rig, and the oil pipe is connected to the square pile drill bit after transition of the transition wheels;
the oil pipe rolling device 60 is composed of a bracket 61, a fixed pipe rolling valve core 62, a rotatable pipe rolling tube 64, a sealing element 67, a bearing and a driving device 66, an oil pipe on a square pile drill bit is connected with an oil pipe interface 65 on the pipe rolling tube 64 and wound on the pipe rolling tube 64, the winding and unwinding of the oil pipe are completed by rotating the pipe rolling tube 64 in the forward and reverse directions, the forward and reverse rotation of the pipe rolling tube 64 is controlled by the driving device 66 connected with the pipe rolling tube 64, in order to increase the torque of the pipe rolling tube 64, a speed reducer is added on the driving device 66, an oil inlet pipe on the pipe rolling tube 64 is provided with a plurality of pipelines, namely oil guide holes 63, annular grooves 68 with the number equal to that of the oil guide holes 63 are arranged on the pipe rolling valve core 62, each oil guide hole 63 is provided with an annular groove 68 corresponding to the oil guide hole 63, the annular groove 68 is communicated with the oil guide hole 63, and the single annular groove 68 is communicated with the single oil pipe interface 65, in order to avoid the oil between the annular grooves 68 from streaming, sealing elements 67 are uniformly arranged on the left side and the right side of each annular groove 68, one oil pipe rolling device 60 can wind and retract a plurality of oil pipes through the oil grooves and the rotary pipe rolling barrel, the respective oil pressure and flow of the plurality of oil pipes are not communicated with each other and do not affect each other, the lifting of the square pile drill bit and the rotation of the oil pipe rolling device 60 can be synchronously carried out through hydraulic control, namely the square pile drill bit descends by one meter, the oil pipe needs to be lengthened by one meter, the clockwise rotation corresponding to the driving device 66 on the oil pipe rolling device 60 releases the pipe by one meter, otherwise, when the square pile drill bit ascends by one meter, the oil pipe needs to be retracted by one meter, and the anticlockwise rotation corresponding to the driving device 66 on the oil pipe rolling device 60 releases the pipe by one meter.
The working principle is as follows: when the square pile drill bit is used for piling, the oil cylinder shunt motor shunts high-pressure oil to the hydraulic motor 31, the hydraulic motor 31 drives the speed reducer 32 to rotate, the speed reducer 32 drives the excavating wheel body 35 to rotate, and the excavating wheel body 35 drives the hard bulge 33 to rotate so as to pile;
when the square pile drill bit cuts, the rotary drilling rig drives the box body 10 to move, the box body 10 drives the excavating assembly 30 to move through the cantilever 20, and the excavating assembly 30 cuts through moving;
when the square pile drill bit moves up and down, the oil pipe needs to be stored, firstly, the driving device 66 drives the rolling pipe barrel 64 to rotate, and the rolling pipe barrel 64 can store the oil pipe through rotation.
While there have been shown and described the fundamental principles and essential features of the invention and advantages thereof, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof; the present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. Telescopic hydraulic pressure side stake drill bit, including box (10), cantilever (20) and oil pipe reelpipe ware (60), its characterized in that: the upper portion of the box body (10) is provided with a connecting square head (14), a box body center hole (12) and a box body fixed pin hole (11) are formed in the body of the box body (10), the cantilever (20) comprises a swing rod (23), a cantilever center hole (25) and a cantilever fixed pin hole (24) are formed in the body of the swing rod (23), the cantilever center hole (25) is aligned with the box body center hole (12), the cantilever fixed pin hole (24) corresponds to the box body fixed pin hole (11), the lower portion of the swing rod (23) is connected with a mounting plate (21), excavating assemblies (30) are mounted on the front side and the rear side of the mounting plate (21), each excavating assembly (30) comprises an excavating wheel body (35) and a hydraulic motor (31) for driving the excavating wheel body (35) to rotate, a speed reducer (32) is arranged on the outer side of a rotating shaft of the hydraulic motor (31), and hard bulges (33) are arranged on the outer side of the excavating wheel body (35), an oil cylinder shunt motor (40) and an oil return collector (50) are installed above the box body (10), an oil inlet of the hydraulic motor (31) is connected with the oil cylinder shunt motor (40) through a pipeline, and an oil outlet of the hydraulic motor (31) is connected with the oil return collector (50) through a pipeline.
2. The telescopic hydraulic square pile drill bit of claim 1, wherein: the top of box (10) is provided with box strengthening rib (15), be provided with rectangle cavity (13) between box strengthening rib (15) and connection square head (14), hydro-cylinder reposition of redundant personnel motor (40) and oil return collector (50) all are located the inboard of rectangle cavity (13).
3. The telescopic hydraulic square pile drill bit of claim 1, wherein: an oil pipe inlet and outlet (22) is formed in the body of the mounting plate (21), and pipelines connected with the oil cylinder shunt motor (40) penetrate through the oil pipe inlet and outlet (22).
4. The telescopic hydraulic square pile drill bit of claim 1, wherein: one side of the excavating wheel body (35) far away from the hydraulic motor (31) is provided with a detachable jewel cutter (34).
5. The telescopic hydraulic square pile drill bit of claim 1, wherein: the oil pipe reelpipe ware (60) includes support (61), install reelpipe case (62) on the body of support (61), the body outside activity cover of reelpipe case (62) is equipped with a roll tube (64), be provided with oil pipe interface (65) on the body of roll tube (64), oil cylinder reposition of redundant personnel motor (40) and oil return collector (50) are connected with oil pipe interface (65) through pipeline respectively.
6. The telescopic hydraulic square pile drill bit of claim 5, wherein: an annular groove (68) is formed in the outer side of the body of the pipe coiling valve core (62), an oil guide hole (63) communicated with the annular groove (68) is formed in the body of the pipe coiling valve core (62) in the transverse direction, and the annular groove (68) is communicated with an oil pipe connector (65).
7. The telescopic hydraulic square pile drill bit of claim 5, wherein: sealing elements (67) are arranged on the left side and the right side of the inner cavity of the pipe coiling barrel (64), the inner side and the outer side of each sealing element (67) are respectively attached to the pipe coiling barrel (64) and the pipe coiling valve core (62), and the annular groove (68) is located between the sealing elements (67) on the two sides.
8. The telescopic hydraulic square pile drill bit of claim 5, wherein: and a driving device (66) for driving the winding tube barrel (64) to rotate is arranged on the outer side of the bracket (61).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210479517.8A CN114809926A (en) | 2022-05-05 | 2022-05-05 | Telescopic hydraulic square pile drill bit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210479517.8A CN114809926A (en) | 2022-05-05 | 2022-05-05 | Telescopic hydraulic square pile drill bit |
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| CN114809926A true CN114809926A (en) | 2022-07-29 |
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| CN202210479517.8A Pending CN114809926A (en) | 2022-05-05 | 2022-05-05 | Telescopic hydraulic square pile drill bit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116220028A (en) * | 2023-04-26 | 2023-06-06 | 中铁城建集团第一工程有限公司 | Integrated square pile hoisting construction device and construction method thereof |
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2022
- 2022-05-05 CN CN202210479517.8A patent/CN114809926A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116220028A (en) * | 2023-04-26 | 2023-06-06 | 中铁城建集团第一工程有限公司 | Integrated square pile hoisting construction device and construction method thereof |
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