CN114016899B - Hydraulic square pile drill bit - Google Patents
Hydraulic square pile drill bit Download PDFInfo
- Publication number
- CN114016899B CN114016899B CN202111313644.2A CN202111313644A CN114016899B CN 114016899 B CN114016899 B CN 114016899B CN 202111313644 A CN202111313644 A CN 202111313644A CN 114016899 B CN114016899 B CN 114016899B
- Authority
- CN
- China
- Prior art keywords
- hydraulic
- oil
- side wall
- hydraulic motor
- excavating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000003921 oil Substances 0.000 claims abstract description 55
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 17
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 8
- 230000005540 biological transmission Effects 0.000 claims description 23
- 238000001816 cooling Methods 0.000 claims description 13
- 239000010705 motor oil Substances 0.000 claims description 11
- 238000005553 drilling Methods 0.000 abstract description 20
- 238000009412 basement excavation Methods 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 239000002828 fuel tank Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000000346 nonvolatile oil Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/001—Drilling a non circular hole
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/042—Controlling the temperature of the fluid
- F15B21/0423—Cooling
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a hydraulic square pile drill bit, which belongs to the technical field of square pile drill bits, and particularly relates to a hydraulic square pile drill bit, which comprises a box body, wherein the upper side wall of the box body is longitudinally and fixedly provided with a connecting square head, four corners of the upper side wall of the box body are fixedly provided with anti-rotation roller mounting supports, anti-rotation rollers are rotatably arranged between two adjacent anti-rotation roller mounting supports, the side wall of the connecting square head is fixedly provided with box reinforcing ribs which are uniformly distributed, an independent hydraulic system drives an excavating wheel to rotate so as to realize cutting piling, high-pressure oil required by the hydraulic system is obtained by shunting hydraulic oil by the hydraulic system of the rotary drilling machine, and the connecting square head of the rotary drilling machine only plays a role of mounting and supporting the whole square pile drill bit.
Description
Technical Field
The invention relates to the technical field of square pile drill bits, in particular to a hydraulic square pile drill bit.
Background
At present, square piles are gradually applied to practical engineering in China, compared with round piles, the square piles have the advantages that the side friction area of the piles is greatly increased, the side friction area of the piles is improved, the bearing capacity of the piles can be greatly improved, the rotary drilling rig is pile construction equipment for hole forming operation, and the rotary drilling rig is widely applied along with the vigorous development of domestic foundation engineering in recent years. The currently used square pile drill bit is difficult to realize that an independent hydraulic system drives the excavating wheel to rotate so as to realize cutting piling, has the advantages of high use safety, high energy consumption and high dependence on the outside.
Disclosure of Invention
The invention aims to provide a hydraulic square pile drill bit, which aims to solve the problems that the conventional square pile drill bit provided in the background art is difficult to realize that an independent hydraulic system drives an excavating wheel to rotate so as to realize cutting pile driving, and the use safety is still to be improved, the energy consumption is relatively high, and the dependence on the outside is relatively high.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a fluid pressure type square pile drill bit, includes the box, the vertical fixedly connected square head that is provided with of upper side wall of box, the four corners department of box upper side wall is all fixed to be provided with anti-rotation cylinder erection support, adjacent two rotate between the anti-rotation cylinder erection support and be provided with anti-rotation cylinder, the inside left end of box is fixed to be provided with the oil tank, the fixed oil tank cooler that is provided with in right-hand member of oil tank cooler, the fixed oil temperature cooling fan that is provided with in right-hand member of oil temperature cooling fan, the fixed oil distributor part that is provided with in right-hand member of cooling fan driving motor, the fixed excavation execution part that is provided with of box.
Preferably, the excavating executing component comprises an excavating wheel and a power transmission part, the excavating wheel comprises an excavating element and an excavating wheel body, a first hydraulic motor oil inlet is arranged above the right end of the power transmission part, and a first hydraulic motor oil outlet is arranged at the lower end of the first hydraulic motor oil inlet.
Preferably, the oil separator component comprises a hydraulic motor mounting box body, a second hydraulic motor is fixedly arranged at the left end of the hydraulic motor mounting box body, an external hydraulic oil inlet is formed in the left end of the upper side wall of the second hydraulic motor, an external hydraulic oil outlet is formed in the right end of the external hydraulic oil inlet, a box cover is fixedly arranged on the right side wall of the hydraulic motor mounting box body, a duplex gear pump is fixedly arranged on the side wall of the box cover, a first oil outlet and a second oil outlet are formed in the upper end of the duplex gear pump, a first transmission gear is sleeved on the right end of the second hydraulic motor, and a second transmission gear is fixedly arranged at the left end of the duplex gear pump and meshed with the first transmission gear.
Preferably, the side wall of the connection square head is fixedly provided with box reinforcing ribs which are uniformly distributed, and the other sides of the box reinforcing ribs which are uniformly distributed are fixedly connected with the side wall of the anti-rotation roller mounting support.
Preferably, the number of the excavating execution members which are uniformly arranged can be arbitrarily changed according to the use requirement.
Compared with the prior art, the invention has the beneficial effects that:
the hydraulic square pile drill bit drives the excavating wheel to rotate for an independent hydraulic system to realize cutting and piling, mechanical rotation power is not required to be taken from the rotary drilling rig, high-pressure oil required by the hydraulic system is obtained by the hydraulic system of the rotary drilling rig through diversion, and the connecting square head of the rotary drilling rig only plays a role of installing and supporting the whole square pile drill bit, so that the safety of the whole equipment is firmer, the energy consumption is lower and more environment-friendly, the system is more independent, the tolerance to the outside is smaller, and the equipment operation environment requirement is more relaxed.
Drawings
FIG. 1 is a schematic diagram of the front structure of the present invention;
FIG. 2 is a schematic top view of FIG. 1;
FIG. 3 is a schematic cross-sectional view of the A-A direction of FIG. 1;
FIG. 4 is a schematic cross-sectional view of the structure in the direction B-B in FIG. 2;
FIG. 5 is a schematic view of the excavation implement components of FIG. 1;
FIG. 6 is a schematic view of the digging wheel of FIG. 5;
FIG. 7 is a schematic view of the structure of the oil separator component;
fig. 8 is an explanatory diagram of the hydraulic system.
In the figure: the hydraulic oil-saving device comprises a box body 1, a connecting square head 2, a rotary-preventing roller mounting support 3, a rotary-preventing roller 4, a box body reinforcing rib 5, a fuel tank 6, a fuel tank 7, a fuel tank cooling fan 8, a cooling fan driving motor 9, a separator part 10, a digging execution part 11, a digging wheel 12, a power transmission part 13, a digging element 14, a digging wheel body 15, a first hydraulic motor oil inlet 16, a first hydraulic motor oil outlet 17, a second hydraulic motor mounting box body 18, a second hydraulic motor 19, an external hydraulic oil inlet 20, an external hydraulic oil outlet 21, a box body cover 22, a duplex gear pump 23, a first oil outlet 24, a second oil outlet 25, a first oil inlet 26, a second oil inlet 27, a first transmission gear 28 and a second transmission gear 29.
Detailed Description
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Examples:
Referring to fig. 1-8, the present invention provides a technical solution: the hydraulic square pile drill bit comprises a box body 1, the upper side wall of the box body 1 is longitudinally and fixedly provided with a connecting square head 2, the connecting square head 2 is connected with a rotary drilling machine working square head, thus realizing the working installation and fixation of the whole square pile drill bit, the box body 1 is a framework of the whole square pile drill bit, four corners of the upper side wall of the box body 1 are fixedly provided with anti-rotation roller installation supports 3, anti-rotation rollers 4 are rotatably arranged between two adjacent anti-rotation roller installation supports 3 and distributed according to the contour of the box body 1, the outer contour of the anti-rotation roller is slightly larger than that of the box body 1, thus realizing the positioning of the square pile drill bit during the working due to the independent rotation of a roller shaft and stronger strength of the roller shaft, preventing the square pile drill bit from large swing in a working deep hole, further affecting the forming of the square deep hole, and being smooth in movement due to the rotation of the roller shaft when the square pile drill bit is lifted upwards or downwards, the left end of the inside of the box body 1 is fixedly provided with an oil tank 6, the right end of the oil tank 6 is fixedly provided with an oil tank cooler 7, the right end of the oil tank cooler 7 is fixedly provided with an oil temperature cooling fan 8, the right end of the oil temperature cooling fan 8 is fixedly provided with a cooling fan driving motor 9, the right end of the cooling fan driving motor 9 is fixedly provided with an oil separator component 10, the driving of a second hydraulic motor 19 is driven by high-pressure oil separated by an excavating drilling machine, the second hydraulic motor 19 drives five groups of duplex gear pumps 23 to rotate respectively through gear transmission power after rotating, so that the five groups of duplex gear pumps 23 can suck hydraulic oil from the oil tank in the box body to output the high-pressure oil, further drive a first hydraulic motor on an excavator walking assembly on an excavating executing component 11 to rotate, then reduce the speed by a speed reducer on the excavator to drive an excavating wheel 12 to rotate so as to realize excavating cutting, due to the presence of 10 excavation execution parts 11, five sets of dual gear pumps 23 are required for driving.
The excavating execution part 11 comprises excavating wheels 12 and power transmission parts 13, the excavating execution part 11 is distributed on the vertical walls around the box body 1, it is noted that the distribution of the excavating execution parts 11 is determined by the size of the square deep holes to be excavated, the excavating execution part is not limited to a specific size and number, the number of the excavating execution parts can be installed according to specific conditions, ten excavating execution parts are arranged in total, four excavating execution parts are arranged on one side in the length direction, ten excavating wheels are arranged on one side in the width direction, the excavating wheels 12 comprise excavating elements 14 and excavating wheel bodies 15, a first hydraulic motor oil inlet 16 is arranged above the right end of the power transmission parts 13, and a first hydraulic motor oil outlet 17 is arranged at the lower end of the first hydraulic motor oil inlet 16.
The oil separator part 10 comprises a hydraulic motor mounting box 18, a second hydraulic motor 19 is fixedly arranged at the left end of the hydraulic motor mounting box 18, an external hydraulic oil inlet 20 is arranged at the left end of the upper side wall of the second hydraulic motor 19, an external hydraulic oil outlet 21 is arranged at the right end of the external hydraulic oil inlet 20, a box cover 22 is fixedly arranged at the right side wall of the hydraulic motor mounting box 18, a duplex gear pump 23 is fixedly arranged at the side wall of the box cover 22, a first oil outlet 24 and a second oil outlet 25 are arranged at the upper end of the duplex gear pump 23, a first oil inlet 26 and a second oil inlet 27 are arranged at the front side wall of the duplex gear pump 23, a first transmission gear 28 is sleeved at the right end of the second hydraulic motor 19, a second transmission gear 29 is fixedly arranged at the left end of the duplex gear pump 23, and the first transmission gear 28 is meshed with the second transmission gear 29.
The side wall of the connecting square head 2 is fixedly provided with box reinforcing ribs 5 which are uniformly distributed, and the other sides of the box reinforcing ribs 5 which are uniformly distributed are fixedly connected with the side wall of the anti-rotation roller mounting support 3.
The number of the excavation implement portions 11 that are uniformly arranged can be arbitrarily changed according to the use requirement.
Working principle: when the hydraulic oil cooling device is used, the number of the excavating execution components 11 can be changed according to specific use conditions, ten excavating execution components 11 are installed for example, when ten excavating execution components 11 are used, five duplex gear pumps 23 are correspondingly used for supplying oil, the rotation of the five duplex gear pumps 23 is driven by gears on the output shafts of a second hydraulic motor 19, the gear pumps are distributed around the output shafts of the second hydraulic motor 19, a rotary drilling machine is used for distributing high-pressure oil to the second hydraulic motor 19 on an oil separator component 10, the second hydraulic motor 19 outputs rotary motion, a first transmission gear 28 on the output shaft of the rotary drilling machine is driven to rotate, a second transmission gear 29 on the input shaft of the duplex gear pump 23 is driven to rotate, the duplex gear pump 23 is driven to suck hydraulic oil from an oil tank 6 and then output high-pressure oil to the excavating execution components 11, because the duplex gear pumps 23 are provided with two oil inlets and two oil outlets, the first hydraulic motor on the excavating execution components 11 is driven to output rotary motion, the rotary motion is driven by the rotary drilling machine connected with the rotary drilling machine, the rotary drilling machine is driven by the rotary drilling machine to rotate, the rotary drilling machine is driven by the rotary drilling machine to drive the rotary drilling machine to rotate, the hydraulic oil pump 12 is driven by the rotary drilling machine to cool the hydraulic motor to the oil pump to the oil tank 6, the oil tank is cooled by the hydraulic motor to obtain the oil tank, the oil is cooled by the hydraulic oil is cooled by the rotary drilling machine, and the oil is cooled by the hydraulic motor, and the oil is cooled by the oil tank is directly cooled by the oil tank.
While the fundamental and principal features of the invention and advantages of the invention have been shown and described, 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 may be embodied in 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.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. The hydraulic square pile drill bit comprises a box body (1), and is characterized in that the upper side wall of the box body (1) is longitudinally and fixedly provided with a connecting square head (2), four corners of the upper side wall of the box body (1) are fixedly provided with anti-rotation roller mounting supports (3), an anti-rotation roller (4) is rotatably arranged between every two adjacent anti-rotation roller mounting supports (3), an oil tank (6) is fixedly arranged at the left end inside the box body (1), an oil tank cooler (7) is fixedly arranged at the right end of the oil tank (6), an oil temperature cooling fan (8) is fixedly arranged at the right end of the oil tank cooler (7), a cooling fan driving motor (9) is fixedly arranged at the right end of the oil temperature cooling fan driving motor (9), and an excavating execution part (11) which is uniformly distributed is fixedly arranged at the lower end of the box body (1);
The excavating execution component (11) comprises an excavating wheel (12) and a power transmission part (13), the excavating wheel (12) comprises an excavating element (14) and an excavating wheel body (15), a first hydraulic motor oil inlet (16) is arranged above the right end of the power transmission part (13), and a first hydraulic motor oil outlet (17) is arranged at the lower end of the first hydraulic motor oil inlet (16);
The oil separator component (10) comprises a hydraulic motor mounting box (18), a second hydraulic motor (19) is fixedly arranged at the left end of the hydraulic motor mounting box (18), an external hydraulic oil inlet (20) is arranged at the left end of the upper side wall of the second hydraulic motor (19), an external hydraulic oil outlet (21) is arranged at the right end of the external hydraulic oil inlet (20), a box cover (22) is fixedly arranged at the right side wall of the hydraulic motor mounting box (18), a duplex gear pump (23) is fixedly arranged at the side wall of the box cover (22), a first oil outlet (24) and a second oil outlet (25) are arranged at the upper end of the duplex gear pump (23), a first oil inlet (26) and a second oil inlet (27) are arranged at the front side wall of the duplex gear pump (23), a first transmission gear (28) is sleeved at the right end of the second hydraulic motor (19), and a second transmission gear (29) is fixedly arranged at the left end of the duplex gear (23), and the first transmission gear (28) is meshed with the second transmission gear (29).
2. The hydraulic square pile drill bit according to claim 1, wherein: the side wall of the connecting square head (2) is fixedly provided with box reinforcing ribs (5) which are uniformly distributed, and the other sides of the box reinforcing ribs (5) which are uniformly distributed are fixedly connected with the side wall of the anti-rotation roller mounting support (3).
3. The hydraulic square pile drill bit according to claim 1, wherein: the number of the digging execution parts (11) which are uniformly distributed can be changed arbitrarily according to the use requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111313644.2A CN114016899B (en) | 2021-11-08 | 2021-11-08 | Hydraulic square pile drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111313644.2A CN114016899B (en) | 2021-11-08 | 2021-11-08 | Hydraulic square pile drill bit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114016899A CN114016899A (en) | 2022-02-08 |
| CN114016899B true CN114016899B (en) | 2024-06-07 |
Family
ID=80062008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111313644.2A Active CN114016899B (en) | 2021-11-08 | 2021-11-08 | Hydraulic square pile drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114016899B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050005296A (en) * | 2003-07-01 | 2005-01-13 | 대우종합기계 주식회사 | Oil cooling apparatus of construction heavy equipment |
| JP3140908U (en) * | 2007-12-21 | 2008-04-17 | 古木 一功 | Multi-drill for ground excavation |
| CN102337959A (en) * | 2011-09-09 | 2012-02-01 | 潍柴动力股份有限公司 | Three-level speed-regulating hydraulically-driven cooling system |
| WO2013078810A1 (en) * | 2011-11-29 | 2013-06-06 | 湖南三一智能控制设备有限公司 | Hydraulic motor system for unit head of self-cooling rotary drilling rig and rotary drilling rig |
| CN203257797U (en) * | 2013-04-01 | 2013-10-30 | 山东山推机械有限公司 | Hydraulic oil temperature cooling device of rotary drilling rig |
| CN206419301U (en) * | 2016-12-09 | 2017-08-18 | 广东科立工业技术股份有限公司 | A kind of hydraulic system independent cooling device |
| CN112796671A (en) * | 2021-01-23 | 2021-05-14 | 成都欣皓地基基础工程有限责任公司 | Cutting type square pile drill bit |
| CN113323582A (en) * | 2021-05-26 | 2021-08-31 | 王天勇 | Square percussion drill structure, rotary excavating machine drill bit with same and application |
| CN216240406U (en) * | 2021-11-08 | 2022-04-08 | 四川杰皓方机械设备有限公司 | Hydraulic square pile drill bit |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE527674C2 (en) * | 2004-10-27 | 2006-05-09 | Atlas Copco Rock Drills Ab | Drilling unit and method for controlling a fan in the same |
| CN104405279B (en) * | 2014-12-10 | 2016-06-29 | 山东恒泰工程集团有限公司 | Square hole rig |
-
2021
- 2021-11-08 CN CN202111313644.2A patent/CN114016899B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050005296A (en) * | 2003-07-01 | 2005-01-13 | 대우종합기계 주식회사 | Oil cooling apparatus of construction heavy equipment |
| JP3140908U (en) * | 2007-12-21 | 2008-04-17 | 古木 一功 | Multi-drill for ground excavation |
| CN102337959A (en) * | 2011-09-09 | 2012-02-01 | 潍柴动力股份有限公司 | Three-level speed-regulating hydraulically-driven cooling system |
| WO2013078810A1 (en) * | 2011-11-29 | 2013-06-06 | 湖南三一智能控制设备有限公司 | Hydraulic motor system for unit head of self-cooling rotary drilling rig and rotary drilling rig |
| CN203257797U (en) * | 2013-04-01 | 2013-10-30 | 山东山推机械有限公司 | Hydraulic oil temperature cooling device of rotary drilling rig |
| CN206419301U (en) * | 2016-12-09 | 2017-08-18 | 广东科立工业技术股份有限公司 | A kind of hydraulic system independent cooling device |
| CN112796671A (en) * | 2021-01-23 | 2021-05-14 | 成都欣皓地基基础工程有限责任公司 | Cutting type square pile drill bit |
| CN113323582A (en) * | 2021-05-26 | 2021-08-31 | 王天勇 | Square percussion drill structure, rotary excavating machine drill bit with same and application |
| CN216240406U (en) * | 2021-11-08 | 2022-04-08 | 四川杰皓方机械设备有限公司 | Hydraulic square pile drill bit |
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| Publication number | Publication date |
|---|---|
| CN114016899A (en) | 2022-02-08 |
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