CN112177520A - A new type of down-the-hole sampling and coring pneumatic percussion drilling tool - Google Patents
A new type of down-the-hole sampling and coring pneumatic percussion drilling tool Download PDFInfo
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- CN112177520A CN112177520A CN202011131835.2A CN202011131835A CN112177520A CN 112177520 A CN112177520 A CN 112177520A CN 202011131835 A CN202011131835 A CN 202011131835A CN 112177520 A CN112177520 A CN 112177520A
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- 238000005553 drilling Methods 0.000 title claims abstract description 31
- 238000005070 sampling Methods 0.000 title claims abstract description 16
- 238000009527 percussion Methods 0.000 title claims abstract description 13
- 230000007246 mechanism Effects 0.000 claims abstract description 7
- 238000009423 ventilation Methods 0.000 claims description 10
- 239000011435 rock Substances 0.000 abstract description 12
- 230000010354 integration Effects 0.000 abstract description 3
- 230000000149 penetrating effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
- E21B4/06—Down-hole impacting means, e.g. hammers
- E21B4/14—Fluid operated hammers
-
- 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
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a novel down-the-hole sampling coring pneumatic percussion drill, which comprises: the joint is connected with one end of the outer cylinder, the other end of the outer cylinder is connected with a drill clamping sleeve, the drill clamping sleeve is connected with the tail end of a central drill in a sliding mode, and the central drill is provided with a drill vent hole and a drill central hole; a limiting mechanism is arranged at the sliding joint of the drill rod clamping sleeve and the tail end of the central drill bit, so that the drill rod clamping sleeve moves by a step distance; the piston is internally provided with a piston center hole, a piston first radial through hole, a piston large-diameter chord section, a piston second radial through hole, a piston axial through hole and a piston inner circumferential ring groove; the tail end of the gas distribution pipe is communicated with the joint, and the head end of the gas distribution pipe is provided with a radial through hole of the gas distribution pipe; the air distribution seat is provided with an air inlet channel of the air distribution seat and a central hole of the air distribution seat in a penetrating way; the reciprocating switching impact is realized through the selective conduction of the holes; the head end of the collecting pipe is inserted with the tail end of the central hole of the drill bit and used for coring. The drilling tool disclosed by the invention can meet the requirements of efficient rock drilling and convenience in coring, and is higher in integration level.
Description
Technical Field
The invention relates to the technical field of impactor manufacturing, in particular to a novel down-the-hole sampling coring pneumatic impact drilling tool.
Background
The pneumatic down-the-hole hammer is also called pneumatic down-the-hole hammer, and is a pneumatic mechanical drilling tool for engineering which uses compressed air as power to push a hammer (piston) to impact a drill bit to implement broken stone hole forming. The hammer and the drill bit are connected through the drill rod and simultaneously enter the hole to break rock in the rock drilling process, the working efficiency is not influenced by the hole depth, and the down-the-hole hammer is named accordingly. The pneumatic down-the-hole hammer drilling technology is widely applied to almost all drilling construction fields of blast hole construction, hydrographic water well drilling, geological core exploration, reservoir dam foundation curtain grouting, engineering geological exploration, non-excavation pipeline laying, building foundation, geotechnical engineering and the like.
In addition, in the rock drilling process, the collection of the rock center sample can be used for geological exploration, seismic research and the like, and along with the deep rock research of people, the requirement of people on the collection of the rock center sample is higher and higher. In the prior art, the collection of rock center samples often suffers from pollution and loss due to untimely collection of collected samples. Moreover, the integrated structure of the impactor and the coring assembly is not perfect, and the perfect matching of efficient impact rock drilling and coring cannot be met, so that the drilling tool has a larger improvement space.
Disclosure of Invention
In view of the above, the present invention aims to provide a novel down-the-hole sampling and coring pneumatic percussion drill, which can meet the requirements of efficient rock drilling and convenient coring, and has high integration level.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the invention provides a novel down-the-hole sampling coring pneumatic percussion drill, which comprises:
the joint is internally provided with a joint center hole, the head end of the joint is connected with one end of a hollow outer cylinder, the other end of the outer cylinder is connected with a drill clamping sleeve, the drill clamping sleeve is internally connected with the tail end of a central drill in a sliding manner along the axis direction of the drill clamping sleeve, and the central drill is provided with a drill vent hole and a drill center hole through the head end and the tail end; a limiting mechanism is arranged at the sliding joint of the drill rod clamping sleeve and the tail end of the central drill bit;
the piston is matched with the outer cylinder in a sliding mode, the first section of the piston is a small-diameter section, the tail end of the piston is a large-diameter section, a piston central hole is formed in the piston axis in a penetrating mode in the first end and the tail end, a first radial through hole communicated with the piston central hole is formed in the large-diameter section close to the tail end, a large-diameter chord tangent plane of the piston communicated with the first radial through hole of the piston is arranged on the outer circle of the large-diameter section, and an inner circumferential annular groove of; a second radial through hole of the piston, a piston axial through hole for communicating the tail end surface of the piston with the second radial through hole of the piston and an inner circumferential annular groove of the piston, which is communicated with the second radial through hole, on the inner wall of the piston are also arranged at the large-diameter section close to the head end;
the piston is provided with a piston center hole, a gas distribution pipe is arranged in the piston center hole in a sliding fit manner, a gas distribution pipe center hole is arranged at the head end and the tail end of the gas distribution pipe, the tail end of the gas distribution pipe is communicated with the head end of the joint center hole, and a gas distribution pipe radial through hole is arranged close to the head end of; the inner circumferential ring groove of the piston is in sliding fit with the outer wall of the air distribution pipe;
the gas distribution seat is sleeved in the central hole of the joint, and a gas distribution seat gas inlet channel and a gas distribution seat central hole are arranged on the gas distribution seat through the head end and the tail end of the gas distribution seat gas inlet channel;
a collecting pipe is sleeved in the central hole of the gas distribution pipe, a central hole of the collecting pipe is arranged in the collecting pipe, one end of the collecting pipe is communicated with the central hole of the gas distribution seat, and the other end of the collecting pipe is spliced with the tail end of the central hole of the drill bit; the inner wall of the head end of the central hole of the gas distribution pipe is closed with the outer wall of the collecting pipe, and the inner wall of the central hole of the gas distribution pipe is in clearance fit with the outer wall of the collecting pipe; and the inner wall of the first section of the central hole of the piston is in clearance fit with the outer wall of the collecting pipe.
Furthermore, the air distribution seat air inlet channels are uniformly distributed around the axis of the air distribution seat, the air distribution seat is connected with a check valve sleeve in a sliding mode along the axis of the air distribution seat, and a check spring for enabling the check valve sleeve to be abutted to the air inlet channel outlet of the air distribution seat in a sliding mode is further arranged on the air distribution seat in a sliding mode.
Furthermore, the head end of the gas distribution seat is also provided with a spring cushion block which tightly props against the end part of the non-return spring.
Furthermore, an inner spline groove is coaxially arranged on the inner wall of the drill clamping sleeve, and correspondingly, an outer spline tooth matched with the outer circumference of the tail end of the central drill bit is arranged on the outer circumference of the tail end of the central drill bit.
Further, the tail end of the drill bit vent hole is communicated with the gap between the spline groove and the spline tooth.
Furthermore, a wear-resistant sleeve is fixedly arranged on the outer circumference of the drill clamping sleeve and is spliced with the outer diameter of the central drill bit.
Further, stop gear includes: the butt joint is in the terminal snap ring of center drill bit, butt joint in snap ring tip and hole and the terminal complex bush of center drill bit, correspondingly, center drill bit end is equipped with the drill bit outer circumference annular with snap ring inner wall complex.
Furthermore, the snap ring is composed of at least two circular arc blocks which are enclosed into a ring shape, and the inner wall of the snap ring is provided with a snap ring ventilation groove.
Furthermore, a bushing ventilating groove is formed in the inner wall of the bushing, and a blocking portion is arranged at the tail end of the bushing ventilating groove.
Compared with the prior art, the invention has the beneficial effects that: the drilling tool can meet the requirement of conveniently coring while meeting efficient rock drilling, and the integration level is high. According to the down-the-hole hammer, different channels are opened and closed by utilizing the movement of the piston, so that the switching of compressed air is controlled, the down-the-hole hammer is good in economy, the consumption of the compressed air is low, the utilization rate is high, the reactive power loss is reduced, the impact energy is increased along with the rise of the gas pressure, the high-frequency, high-pressure and high-energy impact drilling can be realized, the rock drilling efficiency is high, and the energy consumption is low.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic main sectional view of an embodiment of the present invention;
FIG. 2 is a schematic front view of the piston of FIG. 1 in its uppermost position;
FIG. 3 is a schematic sectional view of the piston of FIG. 1 according to the present invention;
FIG. 4 is a schematic cross-sectional view taken along line B-B of FIG. 3 according to the present invention;
FIG. 5 is a schematic cross-sectional view taken along line C-C of FIG. 3 according to the present invention;
FIG. 6 is a schematic cross-sectional view taken along line D-D of FIG. 3 according to the present invention;
FIG. 7 is a schematic cross-sectional view of the drill collar of FIG. 1 according to the present invention;
FIG. 8 is a cross-sectional view of the snap ring of FIG. 1 according to the present invention;
fig. 9 is a schematic cross-sectional view of the bushing of fig. 1 according to the present invention.
In the figure: 1. a joint; 11. a connector central bore; 2. an outer cylinder; 21. an outer cylinder inner circumferential ring groove; 3. a drill rod clamping sleeve; 31. an inner spline groove; 32. an outer spline tooth; 4. a piston; 41. a piston central bore; 42. a piston first radial through bore; 43. a large-diameter chord section of the piston; 44. a piston second radial through hole; 45. a piston axial through hole; 46. an inner circumferential ring groove of the piston; 47. piston small diameter chord section; 5. a gas distribution pipe; 51. a central hole of the gas distribution pipe; 52. a radial through hole of the gas distribution pipe; 6. a gas distribution base; 61. an air inlet channel of the air distribution seat; 62. a central hole of the gas distribution seat; 63. a non-return spring; 64. a spring cushion block; 7. a collection tube; 71. a central bore of the collection tube; 8. a non-return valve sleeve; 9. a wear-resistant sleeve; 10. a center drill; 100. a drill bit vent; 101. a drill bit central hole; 102. a snap ring; 103. a bushing; 104. the drill bit is provided with an outer circumferential ring groove.
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.
Referring to fig. 1-9, in one embodiment, the present invention provides a novel down-the-hole sampling coring pneumatic percussion drill, including:
the joint 1 is internally provided with a joint central hole 11, the head end of the joint is connected with one end of a hollow outer cylinder 2 and can adopt threaded connection, the other end of the outer cylinder 2 is connected with a drill clamping sleeve 3 and also can adopt threaded connection, the drill clamping sleeve 3 is internally connected with the tail end of a central drill 10 in a sliding manner along the axial direction of the drill clamping sleeve, and the central drill is provided with a drill vent hole 100 and a drill central hole 101 through the head end and the tail end; bit vents 100 are used for blowing air and a central bit hole 101 is used for collecting a core; a limiting mechanism is arranged at the sliding joint of the drill clamping sleeve 3 and the tail end of the central drill 10;
the piston 4 is in sliding fit with the outer cylinder 2, the first section of the piston 4 is a small-diameter section, the tail end of the piston 4 is a large-diameter section, a piston central hole 41 is formed in the axis of the piston 4 in a penetrating mode at the first end and the tail end, a first piston radial through hole 42 communicated with the piston central hole 41 is formed in the large-diameter section close to the tail end, a large-diameter piston chord section 43 communicated with the first piston radial through hole 42 is formed in the excircle of the large-diameter section, and an outer cylinder inner circumferential annular groove 21 is formed in the; a second radial piston through hole 44, a piston axial through hole 45 communicating the tail end surface of the piston 4 with the second radial piston through hole 44, and an inner circumferential piston ring groove 46 on the inner wall of the piston 4 and communicated with the second radial piston through hole 44 are further formed in the large-diameter section close to the head end; a piston small-diameter chord section 47 is arranged on the outer circle of the small-diameter section;
the air distribution pipe 5 is in sliding fit with the piston center hole 41, the head end and the tail end of the air distribution pipe 5 penetrate through the air distribution pipe center hole 51, the tail end is communicated with the head end of the joint center hole 11, and an air distribution pipe radial through hole 52 is arranged close to the head end; the inner circumferential ring groove 46 of the piston is in sliding fit with the outer wall of the air distribution pipe 5;
the gas distribution seat 6 is sleeved in the joint central hole 11, and a gas distribution seat gas inlet channel 61 and a gas distribution seat central hole 62 are arranged on the gas distribution seat through the head end and the tail end;
a collecting pipe 7 is sleeved in the central hole 51 of the gas distribution pipe, a collecting pipe central hole 71 is arranged in the collecting pipe central hole, one end of the collecting pipe central hole is communicated with the central hole 62 of the gas distribution seat, and the other end of the collecting pipe central hole is spliced with the tail end of the drill bit central hole 101; the inner wall of the head end of the central hole 51 of the gas distribution pipe is closed with the outer wall of the collecting pipe 7, and the inner wall of the central hole 51 of the gas distribution pipe is in clearance fit with the outer wall of the collecting pipe 7; the inner wall of the first section of the piston central hole 41 is in clearance fit with the outer wall of the collection pipe 7.
The specific working process comprises the following stages: the alloy tooth is equipped with to the terminal surface before the drill bit, and drill bit centre bore 101 lower extreme and stratum top are tight, and high-pressure air passes through in the distribution seat intake duct 61 (the back open check valve cover) on the distribution seat 6 in the joint 1, the pipe leads to the air gap 72, A, the impact section with higher speed: the piston 4 is positioned at the uppermost position, and high-pressure gas in the pipe through air gap 72 passes through the gas distribution pipe radial through hole 52, the second radial through hole 44 and the piston axial through hole 45, so that the pressure gas completely acts on the upper end (namely the tail end) of the piston 4, and the piston moves downwards at full speed to impact the tail end of the central drill bit 10 to perform impact work; B. an upward return segment: after the piston 4 impacts the central drill bit 10 to the lowest end, the radial through hole 52 of the air distribution pipe is aligned with the first radial through hole 42 of the piston, high-pressure gas is conducted with the head end of the central drill bit 10 after passing through the large-diameter chord section 43 of the piston and the inner circumferential annular groove 21 of the outer cylinder, and the high-pressure gas is made to return (move upwards) under the action of the action until the radial through hole 52 of the air distribution pipe is communicated with the second radial through hole 44 again, and then next accelerated impact work is performed. The A, B process is repeated, and the piston 4 is driven to reciprocate to apply work through the switching of the air passage.
During drilling, fine rock material enters the collecting pipe central hole 71 through the drill bit central hole 101, and a core in the fine rock material can be taken out through the core taking mechanism.
Understandably, the drilling tool has compact structure and high impact drilling and coring effects. The different channels are opened and closed by the movement of the piston 4, so that the switching of compressed air is controlled, the down-the-hole hammer has good economy, the consumption of the compressed air is low, the utilization rate is high, the reactive power loss is reduced, the impact energy is increased along with the rise of the gas pressure, the high-frequency, high-pressure and high-energy impact drilling can be realized, the rock drilling efficiency is high, and the energy consumption is low.
In this embodiment, optionally, gas distribution seat intake duct 61 sets up around 6 axis equipartitions of gas distribution seat, gas distribution seat 6 has check valve barrel 8 along its axis sliding connection, it is equipped with the check spring 63 that tightly pushes up gas distribution seat intake duct 61 export with check valve barrel 8 still to slide on the gas distribution seat 6, and check valve barrel 8 sets up seal ring with gas distribution seat intake duct 61 exit. For one-way passage of gas; furthermore, the head end of the gas distribution seat 6 is also provided with a spring cushion block 64 which is tightly pressed against the end part of the non-return spring 63. The installation is convenient.
In this embodiment, optionally, the inner wall of the drill collar 3 is coaxially provided with an inner spline groove 31, and correspondingly, the outer circumference of the end of the central drill bit 10 is provided with a matching outer spline tooth 32. Under the cooperation effect, the center drill 10 is in sliding fit in the drill clamping sleeve 3 and transmits torque.
In this embodiment, optionally, the end of the drill bit vent hole 100 communicates with the gap between the spline groove 31 and the spline tooth 32.
In this embodiment, optionally, a wear-resistant sleeve 9 is further fixedly arranged on the outer circumference of the drill clamping sleeve 3, and the wear-resistant sleeve 9 is inserted into the outer diameter of the central drill 10. The head end of the drill clamping sleeve 3 is abutted against the side wall of the large-diameter section of the central drill bit 10, when the central drill bit 10 slides relatively in the drill clamping sleeve 3, at the moment, the drill bit air vent 100 is disconnected with the gap between the spline groove 31 and the spline tooth 32, and air is discharged laterally.
In this embodiment, optionally, the limiting mechanism includes: the outer cylinder 2 comprises a clamping ring 102 abutting against the tail end of the center drill bit 10 and a bushing 103 abutting against the end of the clamping ring 102, wherein an inner hole of the bushing is matched with the tail end of the center drill bit 10, the other end of the bushing 103 can abut against and limit a step on the inner wall of the outer cylinder 2, and correspondingly, the tail end of the center drill bit 10 is provided with a drill bit outer circumferential annular groove 104 matched with the inner wall of the clamping ring 102.
In this embodiment, optionally, the snap ring 102 is composed of at least two circular arc blocks enclosing to form a ring, and a snap ring vent groove is formed on an inner wall of the snap ring 102. The clamping ring ventilation grooves are communicated with gaps between the spline grooves 31 and the spline teeth 32, and meanwhile, the installation is convenient.
In this embodiment, optionally, a bushing ventilation groove is formed on an inner wall of the bushing 103, and a stop portion is provided at a terminal end of the bushing ventilation groove. When the piston 4 abuts against the tail end of the central drill bit 10, the outer circle of the small-diameter section of the piston is matched with the inner wall of the bushing 103, and as long as the small-diameter head end of the piston 4 slides through the blocking part to enable the small-diameter chord section 47 of the piston to be communicated with the ventilation groove of the bushing, continuous conduction and blowing in the drill bit ventilation hole 100 can be ensured.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. The foregoing is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes may be made without departing from the principle of the present invention, and the technical features described above may be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011131835.2A CN112177520B (en) | 2020-10-21 | 2020-10-21 | A new type of pneumatic impact drill for down-the-hole sampling and coring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011131835.2A CN112177520B (en) | 2020-10-21 | 2020-10-21 | A new type of pneumatic impact drill for down-the-hole sampling and coring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112177520A true CN112177520A (en) | 2021-01-05 |
| CN112177520B CN112177520B (en) | 2024-11-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011131835.2A Active CN112177520B (en) | 2020-10-21 | 2020-10-21 | A new type of pneumatic impact drill for down-the-hole sampling and coring |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115095274A (en) * | 2022-07-01 | 2022-09-23 | 江西东锐机械有限公司 | A large-aperture hydraulic down-the-hole drilling tool |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2036204U (en) * | 1988-03-05 | 1989-04-19 | 地质矿产部水文地质工程地质技术方法研究队 | Valveless hollow coring multi-purpose down-the-hole hammer |
| US6386301B1 (en) * | 1997-10-01 | 2002-05-14 | Ian Graeme Rear | Down-hole hammer |
| CN210598885U (en) * | 2019-10-25 | 2020-05-22 | 长沙黑金刚实业有限公司 | Coring device |
| CN211008529U (en) * | 2019-10-25 | 2020-07-14 | 长沙黑金刚实业有限公司 | Coring device |
| CN213654753U (en) * | 2020-10-21 | 2021-07-09 | 湖南新金刚工程机械有限公司 | Novel down-the-hole sampling coring pneumatic percussion drill |
-
2020
- 2020-10-21 CN CN202011131835.2A patent/CN112177520B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2036204U (en) * | 1988-03-05 | 1989-04-19 | 地质矿产部水文地质工程地质技术方法研究队 | Valveless hollow coring multi-purpose down-the-hole hammer |
| US6386301B1 (en) * | 1997-10-01 | 2002-05-14 | Ian Graeme Rear | Down-hole hammer |
| CN210598885U (en) * | 2019-10-25 | 2020-05-22 | 长沙黑金刚实业有限公司 | Coring device |
| CN211008529U (en) * | 2019-10-25 | 2020-07-14 | 长沙黑金刚实业有限公司 | Coring device |
| CN213654753U (en) * | 2020-10-21 | 2021-07-09 | 湖南新金刚工程机械有限公司 | Novel down-the-hole sampling coring pneumatic percussion drill |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115095274A (en) * | 2022-07-01 | 2022-09-23 | 江西东锐机械有限公司 | A large-aperture hydraulic down-the-hole drilling tool |
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| CN112177520B (en) | 2024-11-22 |
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