CN111636820A - Rotary drilling rig with fixing device with good stability - Google Patents
Rotary drilling rig with fixing device with good stability Download PDFInfo
- Publication number
- CN111636820A CN111636820A CN202010518830.9A CN202010518830A CN111636820A CN 111636820 A CN111636820 A CN 111636820A CN 202010518830 A CN202010518830 A CN 202010518830A CN 111636820 A CN111636820 A CN 111636820A
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- China
- Prior art keywords
- spring
- plate
- rod
- rotary drilling
- fixing device
- 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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- 238000005553 drilling Methods 0.000 title claims abstract description 43
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 14
- 238000013016 damping Methods 0.000 claims abstract description 11
- 230000035939 shock Effects 0.000 claims description 11
- 238000010521 absorption reaction Methods 0.000 claims description 6
- 230000003019 stabilising effect Effects 0.000 claims 1
- 238000009434 installation Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 230000003139 buffering effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process 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
- 239000011435 rock 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/02—Drilling rigs characterised by means for land transport with their own drive, e.g. skid mounting or wheel mounting
-
- 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
- E21B15/003—Supports for the drilling machine, e.g. derricks or masts adapted to be moved on their substructure, e.g. with skidding means; adapted to drill a plurality of wells
-
- 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
- E21B15/04—Supports for the drilling machine, e.g. derricks or masts specially adapted for directional drilling, e.g. slant hole rigs
-
- 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
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
-
- 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
- E21B7/04—Directional drilling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/06—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs
- F16F15/067—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs using only wound springs
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Earth Drilling (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention relates to the technical field of rotary drilling rigs, in particular to a rotary drilling rig with a fixing device with good stability, which comprises a bottom plate and a cab, wherein a base is fixed on one side of the top surface of the bottom plate, which is far away from the cab, a mounting groove is formed in the front end of the base, three clamping grooves are formed in the vertical walls on two sides of the mounting groove, a rotating shaft is clamped by the three clamping grooves through first springs, a mounting seat is fixed at the top of the rotating shaft through a supporting column, a slide guiding column is fixed at the front part of the top surface of the mounting seat, a first clamping groove is formed in the vertical surface of the front end of the slide guiding column, a drilling machine rod is fixedly connected with the first clamping groove through a clamping plate, connecting rods are respectively fixed on the vertical surfaces on two sides of the mounting seat, a damping connecting device is fixed at one end of the connecting rod, a telescopic rod is fixedly installed on the bottom surface of the damping connecting device, thereby achieving better stabilizing effect.
Description
Technical Field
The invention relates to the technical field of rotary drilling rigs, in particular to a rotary drilling rig with a fixing device with good stability.
Background
The rotary drilling rig is a construction machine suitable for hole forming operation in building foundation engineering, is mainly suitable for soil layer construction of sandy soil, cohesive soil, silty soil and the like, and is widely applied to foundation construction of various foundations such as cast-in-place piles, continuous walls, foundation reinforcement and the like, the rated power of the rotary drilling rig is generally 125-450 kW, the power output torque is 120-400 kN.m, the maximum hole forming diameter can reach 1.5-4 m, and the maximum hole forming depth is 60-90 m, so that the requirements of various large-scale foundation construction can be met.
Through retrieval, the patent with the Chinese patent number of CN209724218U discloses a rotary drilling rig with a fixing device with good stability, which comprises an installation seat, wherein a top plate is fixedly installed at the bottom of the installation seat, and a first damping spring is fixedly installed at the bottom of the top plate. This rotary drilling rig with fixing device that steadiness is good, through setting up the roof, can produce great pressure at the in-process of rotary drilling rig work, this pressure will be born by the base of rotary drilling rig, top through bottom and the bottom plate at the roof sets up first damping spring and second damping spring, at first the roof can be pushed down when pressure comes the base, at this moment the mobile jib will be pushed down, move between the bracing piece and push down second damping spring, first damping spring and second damping spring progressively reduce the impact force that pressure brought, thereby reduced rocking of rotary drilling rig, the steadiness of rotary drilling rig has been improved, it is following not enough in the in-process that uses: the structure is complicated, and damper sets up on automobile body both sides and automobile body mount pad, and the rig pole is main vibrations part among the actual work, and prior art can not directly play the shock attenuation effect to the vibrations of rig pole, leads to the shock attenuation effect not obvious.
Disclosure of Invention
The invention aims to provide a rotary drilling rig with a fixing device with good stability, and aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a dig rig soon with fixing device that steadiness is good, includes bottom plate and driver's cabin, driver's cabin fixed mounting is at bottom plate one side front end, the bottom plate top surface is kept away from driver's cabin one side fixed mounting and is had the base, and open at the base front end has the mounting groove, and the vertical wall in mounting groove both sides has the draw-in groove three, and the draw-in groove has the pivot through three first spring joint, and support column fixed mounting is passed through at the pivot top, and the anterior fixed mounting of mount pad top surface has the traveller, and it has draw-in groove one to lead traveller front end facade, and draw-in groove one is through cardboard fixedly connected with rig pole, mount pad both sides facade fixed mounting has the connecting rod respectively, and the connecting rod is kept away from mount pad one end and is fixed with shock attenuation.
As a further scheme of the invention: shock attenuation connecting device includes splice holder and connecting plate, and the splice holder bottom is opened there is draw-in groove two, splice holder is located second spring and connecting plate swing joint in the middle of the two tops of draw-in groove through the second, is located second spring both sides draw-in groove two top surface fixed mounting has the floor, and the floor is kept away from second spring one side and the lateral wall top fixed mounting of draw-in groove two and is had the horizontal pole, the horizontal pole outside is close to floor one side and is equipped with the third spring, is located the horizontal pole outside between the upright wall of third spring and draw-in groove two and still is equipped with the slide bar, and the slide bar is kept away from third spring one end fixed mounting and is had.
As a further scheme of the invention: spacing via hole has been opened to mount pad front end top surface, the rig pole is kept away from cardboard one end and is passed spacing via hole fixed mounting and have the rig head.
As a further scheme of the invention: the bottom surface of the bottom plate is connected with a rotating wheel through a crawler.
As a further scheme of the invention: and a fourth spring is connected between the vertical surface of the rear end of the mounting seat and the top surface of the base.
As a further scheme of the invention: the drilling machine head and the stabilizing plate are in a triangular position relation.
As a further scheme of the invention: the stabilizing plate is horn-shaped.
As a still further scheme of the invention: the stabilizing plate is made of rubber.
Compared with the prior art, the invention has the beneficial effects that: through setting up rig pole and shock attenuation connecting device jointly on the mount pad, can effectually play the effect of buffering to the vibrations that the rig pole produced in the course of the work of rig, can not only cushion Z to the impact force, simultaneously through setting up first spring and third spring, can prevent to rock about the rig pole owing to vibrations to play better stable effect.
Drawings
Fig. 1 is a schematic structural view of a rotary drilling rig with a fixing device with good stability.
Fig. 2 is a schematic top view of a rotary drilling rig with a fixing device with good stability.
Fig. 3 is a schematic view of a partial cross-sectional structure of a rotary drilling rig having a fixing device with good stability.
Fig. 4 is a schematic view of the internal structure of the shock absorption connection device in the rotary drilling rig with the fixing device having good stability.
In the figure: 1-bottom plate, 2-cab, 3-base, 301-mounting groove, 302-clamp groove III, 303-first spring, 304-rotating shaft, 4-mounting seat, 401-limiting through hole, 5-supporting column, 6-guide sliding column, 601-clamp groove I, 602-clamp plate, 603-drilling machine rod, 604-drilling machine head, 7-connecting rod, 8-damping connecting device, 801-connecting body, 802-connecting plate, 803-second spring, 804-ribbed plate, 805-cross rod, 806-sliding rod, 807-third spring, 808-inclined rod, 809-clamp groove II, 9-telescopic rod, 10-supporting rod, 11-stabilizing plate, 12-crawler, 13-rotating wheel and 14-fourth spring.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Example one
Referring to fig. 1-4, in the embodiment of the invention, the rotary drilling rig with the fixing device with good stability comprises a bottom plate 1 and a cab 2, wherein the bottom surface of the bottom plate 1 is connected with a rotating wheel 13 through a crawler 12; the cab 2 is fixedly arranged at the front end of one side of the bottom plate 1, the base 3 is fixedly arranged on one side, away from the cab 2, of the top surface of the bottom plate 1, the front end of the base 3 is provided with an installation groove 301, vertical walls on two sides of the installation groove 301 are provided with a third clamping groove 302, the third clamping groove 302 is clamped with a rotating shaft 304 through a first spring 303, the top of the rotating shaft 304 is fixedly provided with an installation seat 4 through a support column 5, and a fourth spring 14 is connected between the vertical surface of the rear end of the installation seat 4 and; the front part of the top surface of the mounting seat 4 is fixedly provided with a slide guiding column 6, the front end vertical surface of the slide guiding column 6 is provided with a first clamping groove 601, the first clamping groove 601 is fixedly connected with a drilling machine rod 603 through a clamping plate 602, the top surface of the front end of the mounting seat 4 is provided with a limiting through hole 401, and one end of the drilling machine rod 603, which is far away from the clamping plate 602, penetrates through the limiting through hole 401 to be fixedly provided with a drilling machine head 604; the vertical surfaces of two sides of the mounting seat 4 are respectively and fixedly provided with a connecting rod 7, one end of the connecting rod 7, far away from the mounting seat 4, is fixedly provided with a shock absorption connecting device 8, the bottom surface of the shock absorption connecting device 8 is fixedly provided with a telescopic rod 9, the bottom surface of the telescopic rod 9 is fixedly provided with a support rod 10, and the bottom surface of the support rod 10 is fixedly provided with a stabilizing plate 11; the drilling machine head 604 and the stabilizing plate 11 are in a triangular position relation; through setting up first spring 303, can alleviate rocking that mount pad 4 produced for base 3 to guarantee the steadiness of automobile body, through setting up fourth spring 14, can play stable limiting displacement to mount pad 4, through setting up drill head 604 and steadying plate 11 into triangle-shaped position relation, because triangle-shaped has fine stability, can follow the stability that the device is further increased in the structure.
Furthermore, in order to achieve a better stabilizing effect of the rotary drilling rig, the damping connecting device 8 comprises a connecting main body 801 and a connecting plate 802, a second clamping groove 809 is formed in the bottom of the connecting main body 801, the connecting main body 801 is located in the middle of the top of the second clamping groove 809 and is movably connected with the connecting plate 802 through a second spring 803, ribbed plates 804 are fixedly mounted on the top surfaces of the second clamping groove 809 at two sides of the second spring 803, a cross bar 805 is fixedly mounted on one side, away from the second spring 803, of each ribbed plate 804 and the top of the side wall of the second clamping groove 809, a third spring 807 is arranged on one side, close to the ribbed plate 804, of the outer side of each cross bar 805, a sliding rod 806 is further arranged on the outer side of each cross bar 805 between the third spring 807 and the vertical wall of the second clamping groove 809, an inclined rod 808 is; through setting up second spring 803, can effectually play the effect of changing the dashing to the vibrations that rig pole 603 produced in the course of the work of rig, through setting up slide bar 806 and third spring 807, can not only cushion the impact force of rig pole 603Z to, can also prevent that rig pole 603 from rocking about because vibrations.
Example two
In another embodiment of the present invention, the embodiment is different from the above embodiments in that the stabilizer plate 11 has a horn shape; the stabilizing plate 11 is made of rubber; through setting up stabilizer plate 11 shape into loudspeaker shape, the material sets up to the rubber material, can further alleviate rocking that rig pole 603 and rig head 604 produced at the course of the work to increase the stability of whole device.
The working principle of the invention is as follows:
the first spring 303 is arranged to relieve the shaking of the mounting seat 4 relative to the base 3, so as to ensure the stability of the vehicle body, the fourth spring 14 is arranged to play a role in stabilizing and limiting the mounting seat 4, the drill head 604 and the stabilizing plate 11 are arranged in a triangular position relationship, the second spring 803 is arranged to effectively play a role in buffering the shaking generated by the drill rod 603 in the working process of the drilling machine, the sliding rod 806 and the third spring 807 are arranged to not only buffer the Z-direction impact force of the drill rod 603, but also prevent the drill rod 603 from shaking left and right due to the shaking, the drill rod 603 and the shock absorption connecting device 8 are arranged on the mounting seat 4 together, so as to effectively buffer the shaking generated by the drill rod 603 in the working process of the drilling machine, not only buffer the Z-direction impact force, and simultaneously through the first spring 303 and the third spring 807, the drill rod 603 can be prevented from shaking left and right due to vibration, thereby achieving a better stabilizing effect.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A rotary drilling rig with a fixing device with good stability comprises a bottom plate (1) and a cab (2), and is characterized in that the cab (2) is fixedly arranged at the front end of one side of the bottom plate (1), a base (3) is fixedly arranged on one side, away from the cab (2), of the top surface of the bottom plate (1), a mounting groove (301) is formed in the front end of the base (3), clamping grooves III (302) are formed in the vertical walls of the two sides of the mounting groove (301), a rotating shaft (304) is clamped in the clamping grooves III (302) through a first spring (303), a mounting seat (4) is fixedly arranged at the top of the rotating shaft (304) through a supporting column (5), a guide sliding column (6) is fixedly arranged at the front part of the top surface of the mounting seat (4), a clamping groove I (601) is formed in the vertical wall of the front end of the guide sliding column (6), a drilling machine rod (603) is fixedly connected to the clamping groove I (601, one end, far away from the mounting seat (4), of the connecting rod (7) is fixed with a shock absorption connecting device (8), the bottom surface of the shock absorption connecting device (8) is fixedly provided with a telescopic rod (9), the bottom surface of the telescopic rod (9) is fixedly provided with a supporting rod (10), and the bottom surface of the supporting rod (10) is fixedly provided with a stabilizing plate (11).
2. The rotary drilling rig with the fixing device with good stability according to claim 1, wherein the damping connecting device (8) comprises a connecting body (801) and a connecting plate (802), a second clamping groove (809) is formed in the bottom of the connecting body (801), the connecting body (801) is located in the middle of the top of the second clamping groove (809) and movably connected with the connecting plate (802) through a second spring (803), rib plates (804) are fixedly mounted on the top surfaces of the second clamping groove (809) on two sides of the second spring (803), a cross bar (805) is fixedly mounted on one side of each rib plate (804) far away from the second spring (803) and the top of the side wall of the second clamping groove (809), a third spring (807) is arranged on one side of the outer side of each cross bar (805) close to the rib plate (804), and a sliding rod (806) is further arranged on the outer side of each cross bar (805) between the third spring (807) and the vertical, an inclined rod (808) is fixedly installed at one end, far away from the third spring (807), of the sliding rod (806), and one end, far away from the sliding rod (806), of the inclined rod (808) is fixedly connected with the connecting plate (802).
3. The rotary drilling rig with the fixing device with good stability according to claim 2, wherein a limiting through hole (401) is formed in the top face of the front end of the mounting seat (4), and a drilling head (604) is fixedly mounted at one end, far away from the clamping plate (602), of the drilling rod (603) through the limiting through hole (401).
4. The rotary drilling rig with the fixing device with good stability according to claim 3 is characterized in that a rotating wheel (13) is connected to the bottom surface of the bottom plate (1) through a crawler belt (12).
5. The rotary drilling rig with the fixing device with good stability according to claim 4 is characterized in that a fourth spring (14) is connected between the rear end vertical surface of the mounting seat (4) and the top surface of the base (3).
6. The rotary drilling rig with a stable fixing device according to claim 5, wherein the drilling head (604) and the stabilizing plate (11) are in a triangular position relationship.
7. A rotary drilling rig with a robust fixing device according to claim 1 or 6, characterized in that the stabilising plate (11) is trumpet shaped.
8. The rotary drilling rig with the fixing device with good stability according to claim 7, wherein the stabilizing plate (11) is made of rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010518830.9A CN111636820B (en) | 2020-06-09 | 2020-06-09 | Rotary drilling rig with fixing device with good stability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010518830.9A CN111636820B (en) | 2020-06-09 | 2020-06-09 | Rotary drilling rig with fixing device with good stability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111636820A true CN111636820A (en) | 2020-09-08 |
| CN111636820B CN111636820B (en) | 2024-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010518830.9A Active CN111636820B (en) | 2020-06-09 | 2020-06-09 | Rotary drilling rig with fixing device with good stability |
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| Country | Link |
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| CN (1) | CN111636820B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112983262A (en) * | 2021-02-26 | 2021-06-18 | 无锡安丰基础工程有限公司 | Pneumatic rotary drilling percussion drill for superhard rock |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101135171A (en) * | 2007-08-24 | 2008-03-05 | 王来鹏 | Crawler-type electric rotary digging and drilling machine |
| CN202765120U (en) * | 2012-07-02 | 2013-03-06 | 江苏平汉重工有限公司 | Chassis stabilizing device of rotary drilling machine |
| CN203452659U (en) * | 2013-08-14 | 2014-02-26 | 北京市三一重机有限公司 | Rotary drilling jig |
| CN104975812B (en) * | 2015-07-08 | 2017-03-29 | 上海中联重科桩工机械有限公司 | Rotary drilling rig |
| CN205955652U (en) * | 2016-08-24 | 2017-02-15 | 湖南方运重工科技有限公司 | Dig rig strutting arrangement soon |
| CN108104727A (en) * | 2017-12-30 | 2018-06-01 | 天津市九方煤矿机械制造有限公司 | A kind of Pneumatic power supporting leg type accessory anchor bolt drilling machine |
-
2020
- 2020-06-09 CN CN202010518830.9A patent/CN111636820B/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112983262A (en) * | 2021-02-26 | 2021-06-18 | 无锡安丰基础工程有限公司 | Pneumatic rotary drilling percussion drill for superhard rock |
| CN112983262B (en) * | 2021-02-26 | 2022-09-09 | 无锡安丰基础工程有限公司 | Pneumatic rotary drilling percussion drill for superhard rock |
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| CN111636820B (en) | 2024-05-10 |
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Address after: 114000 No.298 a, Anqian Road, Tiedong District, Anshan City, Liaoning Province Patentee after: Northeast Geotechnical Engineering Survey Co.,Ltd. Country or region after: China Address before: 114001 No.298 a, Anqian Road, Tiedong District, Anshan City, Liaoning Province Patentee before: Northeast Geotechnical Engineering Exploration Corp. Country or region before: China |
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