CN215859971U - Annular cutting core-taking down-the-hole hammer drill - Google Patents
Annular cutting core-taking down-the-hole hammer drill Download PDFInfo
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- CN215859971U CN215859971U CN202122392439.1U CN202122392439U CN215859971U CN 215859971 U CN215859971 U CN 215859971U CN 202122392439 U CN202122392439 U CN 202122392439U CN 215859971 U CN215859971 U CN 215859971U
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Abstract
The utility model relates to the technical field of pneumatic down-the-hole hammers, in particular to an annular cutting and coring down-the-hole hammer drilling tool, which comprises: the device comprises a slag collecting barrel, an upper barrel, a splitter top column, a lower barrel and an impactor; the slag collecting barrel is used for collecting broken stones; the upper barrel body is connected with the slag collecting barrel and comprises a side wall; the splitter jack post can be arranged on the side wall in a telescopic manner along the radial direction of the upper cylinder body; the lower cylinder body is connected with the upper cylinder body; the impactor can move along the axial direction of the lower cylinder. In this application, set gradually the collection sediment bucket, go up barrel and impacter, it is bigger that the degree of depth that has increased the down-the-hole hammer creeps into depth of cut, has set up the splitter fore-set simultaneously, has synthesized the function of getting the core, has practiced thrift the time of changing the drill bit, improves work efficiency. The annular cutting effectively reduces the workload of cutting rocks in the drilling process, improves the operation efficiency and reduces the energy consumption. The down-the-hole hammer drill bit is more reasonable in structure, and damage to equipment caused by vibration of the impacter is reduced.
Description
Technical Field
The utility model relates to the technical field of pneumatic down-the-hole hammers, in particular to an annular cutting core-taking down-the-hole hammer drilling tool.
Background
The rotary drilling rig is a construction machine widely applied to rock and soil construction for pore-forming operation at home and abroad, and for medium and hard bedrock strata which are relatively complete and have no bedding cracks, the rotary drilling rig is usually combined with a pneumatic down-the-hole hammer for use. The pneumatic down-the-hole hammer is a pneumatic impact rock-entering machine tool taking compressed air as power. The impact force that the air that has certain pressure that the air compressor machine provided produced directly transmits for the drill bit, forms the broken ability of pulsation to the rock, utilizes the discharged compressed air of impacter simultaneously, cools off the drill bit and discharges the rock particle after the breakage to realize the purpose that the broken high efficiency of hole bottom impact goes into the rock.
At present, most of the existing down-the-hole hammer heads are integrated or bundled, the used pile hole full-end face cutting drilling process has the problems of high power consumption, heavy weight, large equipment vibration, high failure rate and the like.
Therefore it is urgent to wait for utility model a down-the-hole hammer tup, both can realize cyclic annular drilling cutting, get operations such as core, reaming, can realize reducing the consumption again, alleviate equipment weight, reduce vibrations, reduce equipment failure rate to reduce construction cost.
SUMMERY OF THE UTILITY MODEL
One of the technical problems to be solved by the utility model is as follows: the problems of high power consumption, heavy weight, large equipment vibration and high failure rate of the conventional down-the-hole hammer head are solved.
(II) technical scheme
In order to solve the technical problem, the utility model provides an annular cutting core-taking down-the-hole hammer drill, which comprises: the slag collecting barrel is used for collecting broken stones;
the upper cylinder body is connected with the slag collecting barrel and comprises a side wall;
the splitter top column can be telescopically arranged on the side wall along the radial direction of the upper cylinder body;
the lower barrel is connected with the upper barrel;
an impactor movable in an axial direction of the lower barrel.
According to one embodiment of the utility model, a vent pipe is arranged in the side wall along the axial direction of the side wall, and gas is introduced into the vent pipe;
an impact cavity is arranged in the impactor along the axis direction of the impactor, and the impact cavity is communicated with the vent pipe.
According to one embodiment of the utility model, the lower cylinder is connected to the upper cylinder by a first connection member, a first chamber is arranged in the first connection member, and the impact chamber is communicated with the vent pipe by the first chamber.
According to one embodiment of the utility model, the annular cutting core down-the-hole hammer drill further comprises a vent cavity, at least part of the vent pipe being disposed in the vent cavity.
According to one embodiment of the utility model, the upper barrel is connected with the slag collecting barrel through a second connecting piece, a second cavity is arranged in the second connecting piece, and the vent pipe is communicated with gas through the second cavity.
According to one embodiment of the utility model, the annular cutting core down-the-hole hammer drill tool further comprises a square sleeve, and the upper cylinder is connected with the drill rod through the square sleeve.
According to one embodiment of the utility model, the annular cutting core-taking down-the-hole hammer drilling tool further comprises a splitter body, the splitter top column is telescopically arranged on the splitter body along the radial direction of the upper cylinder body, and the splitter body is arranged on the side wall.
According to one embodiment of the utility model, a first O-ring sealing groove is formed in the impactor and used for placing a first sealing ring, and the first sealing ring is located between the impactor and the first connecting piece.
According to one embodiment of the utility model, a plurality of slag discharge grooves are formed in the outer side wall of the lower cylinder, the slag discharge grooves are arranged along the axial direction of the lower cylinder, and the slag discharge grooves are positioned on two sides of the impactor.
According to one embodiment of the utility model, a plurality of wear-resistant guard bars are arranged on the outer side wall of the lower cylinder body and are uniformly distributed along the circumferential direction of the lower cylinder body.
The utility model has the beneficial effects that: the application provides an among the cyclic annular cutting core down-the-hole hammer drilling tool, set gradually the collection sediment bucket, go up barrel and impacter, it is bigger that the degree of depth that has increased the down-the-hole hammer creeps into the depth of cut, has set up the splitter fore-set simultaneously, has synthesized the function of getting the core, has practiced thrift the time of changing the drill bit, improves work efficiency. The annular cutting effectively reduces the workload of cutting rocks in the drilling process, improves the operation efficiency and reduces the energy consumption. The down-the-hole hammer drill bit is more reasonable in structure, and damage to equipment caused by vibration of the impacter is reduced.
Drawings
The advantages of the above and/or additional aspects of the present invention will become apparent and readily appreciated from the following description of the embodiments taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of the general construction of an annular cutting core down-the-hole hammer drill in accordance with an embodiment of the present invention;
FIG. 2 is a general cross-sectional view of an annular cutting core down-the-hole hammer drill bit according to an embodiment of the present invention;
FIG. 3 is a schematic view of the structure of the lower cylinder of the annular cutting core down-the-hole hammer drill tool according to the embodiment of the utility model;
FIG. 4 is a cross-sectional view of the lower barrel of an annular cutting core down-the-hole hammer drill tool in accordance with an embodiment of the present invention;
FIG. 5 is a schematic view of a first flange of an annular cutting core down-the-hole hammer drill in accordance with an embodiment of the present invention;
FIG. 6 is a schematic view of a second flange of an annular cutting core down-the-hole hammer drill in accordance with an embodiment of the present invention;
FIG. 7 is a schematic view of a third flange of an annular cutting core down-the-hole hammer drill in accordance with an embodiment of the present invention;
FIG. 8 is a schematic view of the configuration of the impacter in the annular cutting core down-the-hole hammer drill tool in accordance with an embodiment of the present invention;
FIG. 9 is a schematic view of the upper barrel of an annular cutting core down-the-hole hammer drill in accordance with an embodiment of the present invention;
FIG. 10 is a schematic view of the splitter in a circular cut core down-the-hole hammer drill tool in accordance with an embodiment of the present invention;
FIG. 11 is a schematic bottom view of an annular cutting core down-the-hole hammer drill in accordance with an embodiment of the present invention.
The reference numbers are as follows:
1-lower cylinder body; 2, mounting the cylinder; 3-a slag collecting barrel; 101-bolt hole; 102-lower cylinder inner side plate; 103-lower cylinder outer side wall; 104-an impactor; 1041-impingement air inlet; 1042-O-shaped ring seal groove I; 105-a lower barrel first flange; 1051-a first through aperture; 1052-first chamber inlet; a 1053-O-shaped ring sealing groove II; 106-lower barrel second flange; 1061-a second through aperture; 107-a first side panel; 108-a second side panel; 109-a first chamber; 110-third flange of lower cylinder; 1101-a third through aperture; 111-slag discharge groove; 112-wear-resistant guard bars; 201-upper inner side plate of cylinder; 202-upper barrel outside plate; 203-a breather pipe; 204-an upper barrel first flange; 205-a second chamber lower flange; 206-second chamber upper flange; 207-a second chamber side plate; 208-a second chamber; 209-stand pipe; 210-a first yoke plate; 211-square sleeve; 212-a splitter; 2121-splitter top column; 2122-splitter ear plate; 2123-splitter oil inlet; 2124-oil outlet of the splitter; 301-lifting hole.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the utility model will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
As shown in fig. 1 to 11, the present invention provides an annular cutting core down-the-hole hammer drill comprising: a slag collecting barrel 3, an upper barrel 2, a splitter top pillar 2121, a lower barrel 1 and an impactor 104; the slag collecting barrel 3 is used for collecting broken stones; the upper cylinder body 2 is connected with the slag collecting barrel 3, and the upper cylinder body 2 comprises a side wall; the splitter top post 2121 can be telescopically arranged on the side wall along the radial direction of the upper cylinder 2; the lower cylinder body 1 is connected with the upper cylinder body 2; the impactor 104 is movable in the axial direction of the lower cylinder 1.
Specifically, the slag collecting barrel 3, the upper barrel 2 and the impactor 104 are sequentially arranged, the deep drilling cutting depth of the down-the-hole hammer is increased to be larger, the splitter ejector 2121 is arranged, the coring function is integrated, the time for replacing a drill bit is saved, and the working efficiency is improved. The number of the impactors 104 is a plurality, and the plurality of impactors 104 are evenly distributed along the circumference of the outer side wall of the lower cylinder. Compared with the existing integrated or binding cluster type down-the-hole hammer head, the annular cutting of the impactors 104 does not need full-end face cutting, so that the workload of cutting rocks in the drilling process is effectively reduced, the operation efficiency is improved, and the energy consumption is reduced. And the structure of the down-the-hole hammer drill bit is more reasonable, and compared with the binding cluster type down-the-hole hammer head, the damage of the hammer 104 to the equipment is reduced.
According to one embodiment of the utility model, a vent pipe is arranged in the side wall along the axial direction of the side wall, and gas is introduced into the vent pipe; an impact cavity is arranged in the impactor 104 along the axial direction of the impactor, and the impact cavity is communicated with the vent pipe.
The gas enters the impact cavity through the vent pipe, so that the impactor 104 is driven to move along the axis direction of the lower barrel 1, and the whole lower barrel 1 is convenient for crushing rocks.
According to one embodiment of the present invention, the lower cylinder 1 is connected to the upper cylinder 2 through a first connection member, a first chamber 109 is disposed in the first connection member, and the impact chamber is communicated with the vent pipe through the first chamber 109.
Specifically, the first connecting piece includes a lower cylinder first flange 105, a lower cylinder second flange 106, a first side plate 107 and a second side plate 108, the lower cylinder first flange 105, the lower cylinder second flange 106, the first side plate 107 and the second side plate 108 enclose to form the first connecting piece, and a first cavity 109 is arranged in the first connecting piece. The impactor 104 is provided with an impact air inlet 1041 communicated with an impact cavity, the impact air inlet 1041 is partially positioned in the first chamber 109, the impact cavity is communicated with the first chamber 109 through the impact air inlet 1041, and the vent pipe is communicated with the first chamber 109.
According to one embodiment of the utility model, the annular cutting core down-the-hole hammer drill further comprises a vent cavity, at least part of the vent pipe being disposed in the vent cavity.
Specifically, the vent chamber is provided along the axial direction of the upper barrel 2, and at least part of the vent pipe is provided in the vent chamber.
According to an embodiment of the present invention, the upper cylinder 2 is connected to the slag collecting barrel 3 through a second connection member, a second chamber 208 is disposed in the second connection member, and the vent pipe is used for introducing gas through the second chamber 208.
Specifically, the second connector includes a second chamber lower flange 205, a second chamber upper flange 206, and a second chamber side plate 207, and the second chamber lower flange 205, the second chamber upper flange 206, and the second chamber side plate 207 enclose to form the second connector, and a second chamber 208 is provided in the second connector. The second chamber 208 may be vented and an opening may be provided in the second chamber upper flange 206 through which gas may be vented in the second chamber 208.
According to one embodiment of the utility model, the annular cutting core down-the-hole hammer drill further comprises a square sleeve 211, and the upper cylinder 2 is connected with a drill rod through the square sleeve 211.
Specifically, the bottom of the drill rod is sleeved in the square sleeve 211, and the square sleeve 211 is connected with the drill rod through a pin shaft.
The square sleeve 211 comprises a plurality of side plates, the side plates enclose a containing cavity, long round holes communicated with the containing cavity are formed in the side plates, and the long round holes are formed in the axial direction of the side plates. The square sleeve 211 is connected with a vertical pipe 209, and the vertical pipe 209 is positioned in the slag collecting barrel 3.
Specifically, the pin shaft which is used for facilitating the connection of the square sleeve 211 and the drill rod through the long round hole can move along the long round hole, the pin shaft moves in the length range of the long round hole, pressure or pulling force cannot be generated between the drill rod and the upper cylinder body 2, the rotary drilling rod and the upper cylinder body 2 can be connected, and torque can be provided for the upper cylinder body 2.
According to an embodiment of the present invention, the annular cutting core-drilling down-the-hole hammer drill further includes a splitter 212 body, the splitter top 2121 is telescopically arranged on the splitter 212 body along the radial direction of the upper cylinder 2, and the splitter 212 body is arranged on the side wall.
Specifically, an oil storage cavity is arranged in the splitter 212, and the splitter top pillar 2121 stretches and retracts through oil inlet and outlet of the oil storage cavity. The splitter 212 body is respectively provided with a splitter oil inlet 2123 and a splitter oil outlet 2124 which are communicated with the oil storage cavity. The hydraulic core bit further comprises a mounting piece arranged on the side wall of the upper cylinder body 2, the splitter 212 comprises a splitter ear plate 2122 connected with the splitter 212 body, and the splitter ear plate 2122 is connected with the mounting piece.
According to an embodiment of the utility model, the impactor 104 is provided with an O-ring sealing groove I1042, the O-ring sealing groove I1042 is used for placing a first sealing ring, and the first sealing ring is located between the impactor 104 and the first connecting piece.
In particular, the provision of the first sealing ring facilitates sealing.
According to an embodiment of the present invention, the outer side wall of the lower cylinder 1 is provided with a plurality of slag discharge grooves 111, the slag discharge grooves 111 are arranged along the axial direction of the lower cylinder 1, and the slag discharge grooves 111 are located at two sides of the impactor 104.
Specifically, the provision of the slag chute 111 facilitates the discharge of slag along the slag chute 111.
According to an embodiment of the present invention, a plurality of wear-resistant guard bars 112 are disposed on the outer side wall of the lower cylinder 1, and the plurality of wear-resistant guard bars 112 are uniformly distributed along the circumferential direction of the lower cylinder 1.
The application provides an annular cutting is got core down-the-hole hammer drilling tool and is used, goes up and is furnished with bolt hole 101 between barrel 1 and the lower barrel 2 through flange bolted connection on the flange, and lower barrel 1 is the cavity barrel, and a plurality of impactors 104 of equipartition between lower barrel inside plate 102 and lower barrel outside plate 103, a plurality of impactors 104 are on same circumference. The first flange 105 of the lower cylinder body, the second flange 106 of the lower cylinder body, the first side plate 107 of the first chamber of the lower cylinder body, and the second side plate 108 of the first chamber of the lower cylinder body jointly form a first connecting piece, a first chamber 109 is arranged in the first connecting piece, and the impact air inlet 1041 of the impactor 104 is communicated with the first chamber 109. The first flange 105 of the lower cylinder body is provided with a first through hole 1051, the second flange 106 of the lower cylinder body is provided with a second through hole 1061, the third flange 110 of the lower cylinder body is provided with a third through hole 1101, the first through hole 1051 and the second through hole 1061 have the same size and are smaller than the third through hole 1101, and the impactor 104 sequentially passes through the third through hole 1101, the second through hole 1061 and the first through hole 1051 when being installed. The upper end of the impactor is fastened and locked by double nuts. And a plurality of O-shaped ring sealing grooves I1042 are arranged on the contact surfaces of the impactor and the first through hole 1051 and the second through hole 1061. The lower cylinder first flange 105 is provided with a first chamber inlet 1052 and is arranged with a concentric O-ring seal groove two 1053. The outer side of the lower barrel is provided with a plurality of semicircular slag discharge grooves 111, and the slag discharge grooves 111 are positioned at two sides of the impactor 104. The outer side wall 103 of the lower cylinder body is fixedly provided with a plurality of wear-resistant guard bars 112, and the wear-resistant guard bars 112 are sequentially and vertically arranged and are arranged at intervals.
The upper cylinder body 2 is a hollow cylinder body, a plurality of vent pipes 203 are distributed between the inner side plate 201 of the upper cylinder body and the outer side plate 202 of the upper cylinder body, the lower ends of the vent pipes 203 are connected with first flanges 204 of the lower cylinder body, and the first flanges 204 of the upper cylinder body are uniformly arranged at intervals in a multi-section mode. The upper barrel first flange 204 is bolted to the lower barrel first flange 105. The upper end of the breather pipe 203 is connected with a second chamber lower flange 205. The second chamber lower flange 205, the second chamber upper flange 206, and the second chamber side plate 207 together form a second connecting member, and a second chamber 208 is disposed in the second connecting member. The flange 206 on the second chamber is connected with a vertical pipe 209, a plurality of first connecting plates 210 are uniformly distributed around the vertical pipe 209, the diameter of the outermost circumscribed circle of the first connecting plates 210 is smaller than the inner diameter of the slag collecting barrel 3, and the first connecting plates 210 play a role in positioning and guiding the slag collecting barrel 3. The upper end of the vertical pipe 209 is connected with a square sleeve 211, the square sleeve 211 is used for being connected with a drill rod, a long round hole is formed in the side face of the square sleeve, and when the down-the-hole hammer works normally, only torque force is transmitted between the square sleeve 211 and the square head of the drill rod, and pressure in the vertical direction is not transmitted. The upper barrel side wall is provided with a splitter 212, the three splitters form a group, the two splitters 212 are positioned on the outer side of the upper barrel side wall, the splitter top pillar 2121 faces the pile hole wall, one splitter 212 is positioned on the inner side of the upper barrel side wall, and the splitter top pillar 2121 faces the rock core. The splitting device ear plates 2122 are located on two sides of the splitting device, and bolt holes are formed in the splitting device ear plates 2122 and used for fixing the splitting device. The upper end of the splitter is provided with a splitter oil inlet 2123 and a splitter oil outlet 2124. During coring, the splitter support 2121 extends out simultaneously, the outer splitter supports against the wall of the pile hole, the inner splitter supports against the rock core, oil pressure is increased continuously, and finally the splitter 212 infers the rock core and clamps the lifting pile hole.
The slag collecting barrel 3 is of a single-layer tubular structure, the lower end face of the slag collecting barrel is positioned above the second chamber, and the upper end face of the slag collecting barrel is lower than the lower bottom face of the square sleeve. The upper end of the slag collecting barrel is provided with a hoisting hole 301.
To sum up, among the cyclic annular cutting core-taking down-the-hole hammer drilling tool that this application provided, set gradually the sediment bucket, go up barrel and impacter, it is bigger to have increased the degree of depth that creeps into the depth of cut of down-the-hole hammer, has set up the splitter fore-set simultaneously, has synthesized the function of getting the core, has practiced thrift the time of changing the drill bit, improves work efficiency. The annular cutting effectively reduces the workload of cutting rocks in the drilling process, improves the operation efficiency and reduces the energy consumption. The down-the-hole hammer drill bit is more reasonable in structure, and damage to equipment caused by vibration of the impacter is reduced.
In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
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; the communication may be direct, indirect via an intermediate medium, or internal to both elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
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 utility model, 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 (10)
1. The utility model provides an annular cutting core down-the-hole hammer drilling tool which characterized in that includes:
the slag collecting barrel is used for collecting broken stones;
the upper cylinder body is connected with the slag collecting barrel and comprises a side wall;
the splitter top column can be telescopically arranged on the side wall along the radial direction of the upper cylinder body;
the lower barrel is connected with the upper barrel;
an impactor movable in an axial direction of the lower barrel.
2. The annular cutting coring down-the-hole hammer drill of claim 1, wherein: a vent pipe is arranged in the side wall along the axis direction of the side wall, and gas is introduced into the vent pipe;
an impact cavity is arranged in the impactor along the axis direction of the impactor, and the impact cavity is communicated with the vent pipe.
3. The annular cutting coring down-the-hole hammer drill of claim 2, wherein: the lower barrel is connected with the upper barrel through a first connecting piece, a first cavity is arranged in the first connecting piece, and the impact cavity is communicated with the vent pipe through the first cavity.
4. The annular cutting coring down-the-hole hammer drill of claim 3, wherein: the annular cutting core-taking down-the-hole hammer drill further comprises a ventilation cavity, and at least part of the ventilation pipe is arranged in the ventilation cavity.
5. The annular cutting coring down-the-hole hammer drill of claim 2, wherein: the upper barrel body is connected with the slag collecting barrel through a second connecting piece, a second cavity is arranged in the second connecting piece, and the vent pipe is communicated with gas through the second cavity.
6. The annular cutting coring down-the-hole hammer drill of claim 1, wherein: the annular cutting core-taking down-the-hole hammer drilling tool further comprises a square sleeve, and the upper cylinder body is connected with the drill rod through the square sleeve.
7. The annular cutting coring down-the-hole hammer drill of claim 1, wherein: the annular cutting core-taking down-the-hole hammer drilling tool further comprises a splitter body, the splitter ejection column is arranged on the splitter body in a radially telescopic mode along the upper cylinder, and the splitter body is arranged on the side wall.
8. The annular cutting coring down-the-hole hammer drill of claim 3, wherein: the first O-shaped ring sealing groove is formed in the impactor and used for placing a first sealing ring, and the first sealing ring is located between the impactor and the first connecting piece.
9. The annular cutting coring down-the-hole hammer drill of claim 1, wherein: the lateral wall of barrel is equipped with a plurality of row's cinder notch down, arrange the cinder notch along the axis direction of barrel sets up down, just it is located to arrange the cinder notch the both sides of impacter.
10. The annular cutting coring down-the-hole hammer drill of claim 1, wherein: be provided with many wear-resisting protecting strips on the lateral wall of barrel down, many wear-resisting protecting strips are followed the circumference equipartition of barrel down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122392439.1U CN215859971U (en) | 2021-09-30 | 2021-09-30 | Annular cutting core-taking down-the-hole hammer drill |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122392439.1U CN215859971U (en) | 2021-09-30 | 2021-09-30 | Annular cutting core-taking down-the-hole hammer drill |
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| CN215859971U true CN215859971U (en) | 2022-02-18 |
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|---|---|---|---|
| CN202122392439.1U Active CN215859971U (en) | 2021-09-30 | 2021-09-30 | Annular cutting core-taking down-the-hole hammer drill |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116677312A (en) * | 2023-07-14 | 2023-09-01 | 亚核智造(江苏)科技有限公司 | Annular cutting type pneumatic impact drilling tool |
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2021
- 2021-09-30 CN CN202122392439.1U patent/CN215859971U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116677312A (en) * | 2023-07-14 | 2023-09-01 | 亚核智造(江苏)科技有限公司 | Annular cutting type pneumatic impact drilling tool |
| CN116677312B (en) * | 2023-07-14 | 2024-01-30 | 亚核智造(江苏)科技有限公司 | Annular cutting type pneumatic impact drilling tool |
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