CN104033101A - Major-diameter pneumatic downhole hammer with casing pipe drill - Google Patents
Major-diameter pneumatic downhole hammer with casing pipe drill Download PDFInfo
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- CN104033101A CN104033101A CN201410218494.0A CN201410218494A CN104033101A CN 104033101 A CN104033101 A CN 104033101A CN 201410218494 A CN201410218494 A CN 201410218494A CN 104033101 A CN104033101 A CN 104033101A
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Abstract
The invention discloses a major-diameter pneumatic downhole hammer with a casing pipe drill. The major-diameter pneumatic downhole hammer comprises a major-diameter pneumatic downhole hammer body (24), a spiral conveying pipe (2) and the casing pipe drill (13), all of which are coaxially arranged. The major-diameter pneumatic downhole hammer body (24) is sleeved with the spiral conveying pipe (2) so that the power can be transmitted and the spiral conveying pipe (2) and the major-diameter pneumatic downhole hammer body (24) can be prevented from being separated from each other in the impacting process, and the casing pipe drill (13) is located outside the spiral conveying pipe (2).By means of inverse double rotation adopted in the downhole hammer body and the casing pipe drill and impact rotation action of the downhole hammer, the major-diameter pneumatic downhole hammer with the casing pipe drill has the advantages that the drilling efficiency is very high under various complicated geological conditions such as soft or hard stratums, rubble layers, pebble beds and float stone layers, the hole wall quality is good, vertical precision is high and the construction is quick.
Description
Technical field
The invention belongs to Rock and Soil Drilling Engineering and foundation construction pile foundation technology field, relate in particular to a kind of large-diameter DTH air hammer with Sleeve drill.
Background technology
The method that human use impacts acting is engaged in productive labor and can be traced back to remote ancient times.Ancient times, the mankind carried out fragmentation and processing with regard to having learned utilization impact mode in the productive labor the earliest such as lumbering, fabrication tool, hunting.China working people has just manufactured in ancient times rope and has bored Drilling well, has invented the trigger mechanism of a crossbow again to the period of the Warring States according to impact principle.After gunpowder invention, the principle of utilizing gunpowder explosion to produce intense impact effect has been invented rocket, cannon etc.Scrutinize ancient Chinese working people's wisdom history, often can find the application of percussion principle.
Although the mankind have used very early to impact and have helped better produce and work, but these application are all disposable (as bows and arrows) or discontinuous (as axe), and be applied on boring, well also lessly, really utilizing bump to realize and creeping into is nearly one, bicentenary thing.Within 1813, first British Richard Te Liweixike has invented the percussion hammer taking steam as power, and continuous percussion action is just really become a kind of reality.In Italy engineer Bart, spy and Jie Mansameite improve hammer drill in the past again, announce experimental study success on August 15th, 1857, and this is the beginning of modern percussion drilling technology.
Hammer drill is in continuous development subsequently, but it is found that the mode that drill bit top is applied to impact force exists energy dissipation serious, and inefficient problem, so people consider how to apply impact force in the bottom of drill bit.By continuous practice and research, the real down-the-hole air hammer close with modern down-the-hole air hammer (downhole rock drill) structure, was manufactured and designed by Belgian engineer's Andres Tan Niuyike in nineteen fifty-one.Down-the-hole air hammer not only can make full use of the impact energy of equipment, and can make noise greatly reduce, and improves operating environment, alleviates the heavy manual labor of workman.Due to the outdoor drilling efficiency of down-the-hole air hammer than traditional high 2-3 of gang rope impact drill doubly, be acknowledged as the economy of Drilling hard ore for the moment and effective rig.
Down-hole percussion drill hole is also widely used in Japan, Korea S.China is with a vast territory, and each regional geological condition is widely different, and this band geological condition of southeastern coast is mainly with hard rock, and cobble erratic boulder is main, and geological condition is more complicated.For Complicated Geologic Condition, make down-hole hammer with entering with pipe bit more, although down-hole hammer is met with and can effectivelyly be carried out retaining wall to hole with pipe, DTH with simultaneous casing technology, for this geology, exists and inefficient problem larger into rock drilling construction difficulty.DTH with simultaneous casing is also used for the construction of Small Diameter Pile datum hole, also rarely found for the construction of large diameter pile datum hole.
Along with urbanization process is constantly accelerated, a lot of big construction items are faced with the heavy difficult problem of tight task of duration, and how within the limited duration, completing to safe and efficient environmental protection set task becomes ground rock drilling and infrastructure a great problem.
Summary of the invention
The object of this invention is to provide a kind of large-diameter DTH air hammer with Sleeve drill, driving respectively large-diameter DTH air hammer and Sleeve drill to realize double rotating by double speed Bidirectional power head creeps into, reaching aperture, hole wall quality is good, the high and effect rapidly of constructing of vertical precision.
For reaching above object, solution of the present invention is as follows:
The invention provides a kind of large-diameter DTH air hammer with Sleeve drill, comprise large-diameter DTH air hammer, spiral conveying tube and Sleeve drill, above element coaxial is arranged, described spiral conveying tube overcoat is positioned at the outside of described large-diameter DTH air hammer, with transferring power and prevent from making described spiral conveying tube and described large-diameter DTH air hammer to be separated from each other in impact process, described Sleeve drill is positioned at the outside of described spiral conveying tube, and the compressed air that its gap is conducive to rise is taken away hole bed rock bits.
Described large-diameter DTH air hammer comprises top connection, outer shell, piston, fairlead, snap ring, sealing ring, Kazakhstan furan, lining, pad, lower contact and drill bit, coaxially arranged successively with upper-part, described top connection and described lower contact are fixed and are connected with the described outer inside wall of cylinder by screw thread, described snap ring is embedded in the described outer inside wall of cylinder, and described piston is carried out to axial limiting and in cylinder body, fall down because of deadweight at piston described in assembling is when drill bit preventing, described fairlead is fixed on described bit central hole by interference fit, make described piston can vertically clash into described drill bit, described Kazakhstan furan carries out axial location by the described outer inside wall of cylinder and described lining, and described drill bit is played to position-limiting action, described sealing ring is embedded in outside the furan of described Kazakhstan in groove, between described outer shell and described Kazakhstan furan, seal, prevent compressed air leakage, described pad is between described outer shell and described lower contact, increase the active area of described outer shell and described lower contact, prevent from being threaded being under high-frequency percussion and be damaged, described lower contact passes to described drill bit by spline fitted by power.
Described large-diameter DTH air hammer is connected with transferring power with double power head by drilling rod.
The diameter of described drill bit bottom inserted tooth face is 574mm, and top is 228mm with the diameter of piston phase striking face, and the diameter of center roof vent is 80mm, comprises external splines, 4 steam vents, 8 longitudinal slag-drip openings and 4 transverse row cinder notch; Described external splines is connected with transmitting torque with lower contact rectangle internal spline, dreg removing system at the bottom of described steam vent, described longitudinal slag-drip opening and described transverse row cinder notch composition hole, described steam vent becomes 30 ° with bit central air vent, be arranged symmetrically with, make gas jet equably at the bottom of topped whole hole.
Described external splines be shaped as rectangle, key is wide is 36mm.
The diameter of described steam vent is 45mm.
The diameter of described longitudinal slag-drip opening and described transverse row cinder notch is 60mm, has arc invaginating structure, is arranged symmetrically with, and can ensure, under the prerequisite of drill body intensity, to reduce the pressure loss, makes landwaste faster at the bottom of tap.
Described spiral conveying tube comprises helix tube joint, spiral weld tabs and steel pipe, and described helix tube joint is positioned at one end of described steel pipe, and described helix tube joint and 4 described spiral weld tabs are welded and fixed and are positioned on described steel pipe.
Described spiral conveying tube carries out interference fit with transferring power by the interior hexagonal structure of helix tube joint and the outer-hexagonal structure of top connection.
The internal diameter of described spiral weld tabs is 406mm, and external diameter is 570mm, and pitch is 440mm.
The internal diameter of described steel pipe is 375mm, and external diameter is 405mm, and thickness is 15mm, and length is 1800mm.
Described helix tube joint has interior hexagonal structure, and external diameter is 405mm, and thickness is 50mm, and the interior hexagon length of side is 127mm, can coordinate with the outer-hexagonal structure of top connection, makes power be delivered to spiral conveying tube from top connection.
Described Sleeve drill top has through hole, the aggregate chips with coming on compressed air and soil block can be discharged, and described Sleeve drill lower surface is inlaid with brill tooth, can rotate fractured rock.
Described Sleeve drill is connected with transferring power with the slewing equipment of double power head.
The internal diameter of described Sleeve drill is 600mm, and thickness is 20mm.
Described brill tooth is that sheet is bored tooth or spherical brill tooth, bores teeth or spherical brill tooth according to different operating mode choose reasonable sheets, simultaneously also can adjusting sleeve pipe bit and large-diameter DTH air hammer relative position, adapt to different stratum conditions.
The present invention compared with the existing technology, has the following advantages and beneficial effect:
Large-diameter DTH air hammer with Sleeve drill provided by the invention is high efficiency drilling and forming hole under various soft or hards stratum, macadam, boulder bed and the various complex geological conditions such as stone rock stratum that waft, simultaneously because the rotation of Sleeve drill is followed up, reached aperture, hole wall quality is good, the high and effect rapidly of constructing of vertical precision; Overcoming the problems such as the noise, vibration, mud contamination of traditional rock drilling machine, is a kind of rig of environment-friendly and green.
Large-diameter DTH air hammer with Sleeve drill provided by the invention is owing to having adopted the reverse double back of down-hole hammer and Sleeve drill to turn, add the impact rotating effect of down-hole hammer, this drilling equipment is at various soft or hards stratum, macadam, boulder bed and waft under the various complex geological conditions such as stone rock stratum, there is very high drilling efficiency, and hole wall quality is good, the high and advantage such as rapid of constructing of vertical precision.
Brief description of the drawings
Fig. 1 is the structural representation of large-diameter DTH air hammer shown in embodiment 1.
Fig. 2 is the structural representation of spiral conveying tube shown in embodiment 1.
Fig. 3 is the structural representation of drill bit shown in embodiment 1.
Fig. 4 is the schematic diagram of whole bench drill machine operating principle shown in embodiment 1.
Fig. 5 is the schematic diagram that embodiment 1 is shown in large-diameter DTH air hammer and Sleeve drill relative position under general geology condition.
Fig. 6 is the schematic diagram that embodiment 1 is shown in large-diameter DTH air hammer and Sleeve drill relative position under inclination Bedrock Geology condition.
Fig. 7 is that Sleeve drill lower surface shown in embodiment 1 is inlaid with a kind of structural representation that bores tooth.
Fig. 8 is that Sleeve drill lower surface shown in embodiment 1 is inlaid with the another kind of structural representation that bores tooth.
Wherein: 1 is top connection, and 2 is spiral conveying tube, and 3 is outer shell, and 4 is piston, and 5 is fairlead, 6 is snap ring, and 7 is sealing ring, and 8 for breathing out furan, and 9 is lining, and 10 is pad, 11 is lower contact, and 12 is drill bit, and 13 is Sleeve drill, and 14 is helix tube joint, 15 is spiral weld tabs, and 16 is steel pipe, and 17 is external splines, and 18 is steam vent, 19 is longitudinal slag-drip opening, and 20 is transverse row cinder notch, and 21 is pile frame, and 22 is double power head, 23 is drilling rod, and 24 is large-diameter DTH air hammer, and 25 bore tooth for sheet, and 26 is spherical brill tooth.
Detailed description of the invention
Below in conjunction with accompanying drawing illustrated embodiment, the present invention is further detailed explanation.
Embodiment 1
As shown in Figures 1 to 3, Fig. 1 is the structural representation of large-diameter DTH air hammer shown in embodiment 1; Fig. 2 is the structural representation of spiral conveying tube shown in embodiment 1; Fig. 3 is the structural representation of drill bit shown in embodiment 1.A kind of large-diameter DTH air hammer with Sleeve drill, comprise large-diameter DTH air hammer 24, spiral conveying tube 2 and Sleeve drill 13, above element coaxial is arranged, described spiral conveying tube 2 overcoats are positioned at the outside of described large-diameter DTH air hammer 24, with transferring power with prevent from making described spiral conveying tube 2 and described large-diameter DTH air hammer 24 to be separated from each other in impact process, described Sleeve drill 13 is positioned at the outside of described spiral conveying tube 2, and the compressed air that its gap is conducive to rise is taken away hole bed rock bits.
Described large-diameter DTH air hammer 24 comprises top connection 1, outer shell 3, piston 4, fairlead 5, snap ring 6, sealing ring 7, breathes out furan 8, lining 9, pad 10, lower contact 11 and drill bit 12, coaxially arranged successively with upper-part, described top connection 1 and described lower contact 11 are fixed and are connected with described outer shell 3 inwalls by screw thread, described snap ring 6 is embedded in described outer shell 3 inwalls, and described piston 4 is carried out to axial limiting and in cylinder body, fall down because of deadweight at piston 4 described in assembling is when drill bit 12 preventing, described fairlead 5 is fixed on described drill bit 12 centre bores by interference fit, make described piston 4 can vertically clash into described drill bit 12, described Kazakhstan furan 8 carries out axial location by described outer shell 3 inwalls and described lining 9, and to 12 position-limiting actions of described drill bit, described sealing ring 7 is embedded in described Kazakhstan furan 8 outside grooves, between described outer shell 3 and described Kazakhstan furan 8, seal, prevent compressed air leakage, described pad 10 is between described outer shell 3 and described lower contact 11, increase the active area of described outer shell 3 and described lower contact 11, prevent from being threaded being under high-frequency percussion and be damaged, described lower contact 11 passes to described drill bit 12 by spline fitted by power.Breathe out furan 8 and cut into two halves by a global facility line, play position-limiting action easy to assembly and to drill bit.
Compressed air from air compressor machine enters top connection 1 after drilling rod 23 centre bores, now compressed air can be divided into two parts, a part is the centre bore with drill bit 12 inside by piston 4, at the bottom of being finally discharged to drill bit 12 holes, this portion of air has played cooling drill bit 12 and the effect that allows better soil bits, stone discharge; Another part is by the cooperation between the inner each element of large-diameter DTH air hammer 24, make piston 4 according to certain frequency drill hammer 12, drill bit 12 and Sleeve drill 13, with different speed bidirectional rotations under the driving of double power head 22, finally reach the optimum efficiency that impacts the broken rock of rotation simultaneously.
Described large-diameter DTH air hammer 24 is connected with transferring power with double power head 22 by drilling rod 23.
The diameter of described drill bit 12 bottom inserted tooth faces is 574mm, and top is 228mm with the diameter of piston 4 phase striking faces, and the diameter of center roof vent is 80mm, comprises 19 and 4 transverse row cinder notch 20 of 18,8 longitudinal slag-drip openings of 17,4 steam vents of external splines; Described external splines 17 is connected with transmitting torque with lower contact 11 rectangle internal splines, described steam vent 18, described longitudinal slag-drip opening 19 and described transverse row cinder notch 20 form dreg removing system at the bottom of hole, described steam vent 18 becomes 30 ° with drill bit 12 center roof vents, be arranged symmetrically with, make gas jet equably at the bottom of topped whole hole.
Described external splines 17 be shaped as rectangle, key is wide is 36mm.
The diameter of described steam vent 18 is 45mm.
The diameter of described longitudinal slag-drip opening 19 and described transverse row cinder notch 20 is 60mm, has arc invaginating structure, is arranged symmetrically with, and can ensure, under the prerequisite of drill bit 12 body intensity, to reduce the pressure loss, makes landwaste faster at the bottom of tap.
Described spiral conveying tube 2 comprises helix tube joint 14, spiral weld tabs 15 and steel pipe 16, and described helix tube joint 14 is positioned at one end of described steel pipe 16, and 14 and 4 described spiral weld tabs 15 of described helix tube joint are welded and fixed and are positioned on described steel pipe 16.
Described spiral conveying tube 2 carries out interference fit with transferring power by the interior hexagonal structure of helix tube joint 14 and the outer-hexagonal structure of top connection 1.At the bottom of blowing by force hole with traditional air-flow, compared with deslagging, spiral conveying tube 2 deslagginves had both reduced the air output of air compressor machine and had gone out wind pressure, had reduced the environment pollution to working site simultaneously.
The internal diameter of described spiral weld tabs 15 is 406mm, and external diameter is 570mm, and pitch is 440mm.
The internal diameter of described steel pipe 16 is 375mm, and external diameter is 405mm, and thickness is 15mm, and length is 1800mm.
Described helix tube joint 14 has interior hexagonal structure, and external diameter is 405mm, and thickness is 50mm, and the interior hexagon length of side is 127mm, can coordinate with the outer-hexagonal structure of top connection 1, makes power be delivered to spiral conveying tube 2 from top connection 1.
Described Sleeve drill 13 tops have through hole, the aggregate chips with coming on compressed air and soil block can be discharged, and described Sleeve drill 13 lower surfaces are inlaid with brill tooth, can rotate fractured rock.
Described Sleeve drill 13 is connected with transferring power with the slewing equipment of double power head 22.
The internal diameter of described Sleeve drill 13 is 600mm, and thickness is 20mm.
Described brill tooth is that sheet is bored tooth 25 or spherical brill tooth 26, bores teeth 25 or spherical brill tooth 26 according to different operating mode choose reasonable sheets, simultaneously also can adjusting sleeve pipe bit 13 and large-diameter DTH air hammer 24 relative positions, adapt to different stratum conditions.
Fig. 4 is the schematic diagram of whole bench drill machine operating principle shown in embodiment 1.Double power head 22 drive respectively large-diameter DTH air hammer 24 from Sleeve drill 13 with different speed opposite spins, pile frame 21 applies static pressure with Sleeve drill 13 to whole drilling rod 23, and compressor makes it complete ballistic motion constantly to large-diameter DTH air hammer 24 air feed simultaneously.Under many kinds of force effect, what double dynamical down-hole hammer rig can high-effect high-quality completes the task of creeping into, and spiral conveying tube 2 is constantly discharged rig by aggregate chips by the hole on Sleeve drill 13.Although Sleeve drill 13 does not have percussion, under static pressure and revolving force effect, bore tooth by lower surface and still can constantly creep into, play the effect of retaining wall simultaneously.
As shown in Figure 5 and Figure 6, Fig. 5 is the schematic diagram that embodiment 1 is shown in large-diameter DTH air hammer and Sleeve drill relative position under general geology condition; Fig. 6 is the schematic diagram that embodiment 1 is shown in large-diameter DTH air hammer and Sleeve drill relative position under inclination Bedrock Geology condition.Fig. 5 is under general geology condition, and the operating position of large-diameter DTH air hammer 24 should be below Sleeve drill 13; Fig. 6 is under inclination Bedrock Geology condition, and the operating position of large-diameter DTH air hammer 24 should be on Sleeve drill 13, is furnished with to be like this beneficial to improve drilling quality and efficiency.
As shown in Figure 7 and Figure 8, Fig. 7 is that Sleeve drill lower surface shown in embodiment 1 is inlaid with a kind of structural representation that bores tooth; Fig. 8 is that Sleeve drill lower surface shown in embodiment 1 is inlaid with the another kind of structural representation that bores tooth.Spherical brill tooth 26 has large, the firm wear-resisting feature of impact resistance, but the easy passivation of spherical brill tooth 26 can affect Sleeve drill 13 rate of penetrations after passivation; It is much slower than spherical brill tooth 26 that sheet is bored tooth 25 passivation speed, but soundness and anti-gauge wear are not as spherical brill tooth 26.Can be for different working conditions, choose reasonable Sleeve drill 13 profiles of tooth.
The above-mentioned description to embodiment is can understand and apply the invention for ease of those skilled in the art.Person skilled in the art obviously can easily make various amendments to these embodiment, and General Principle described herein is applied in other embodiment and needn't passes through performing creative labour.Therefore, the invention is not restricted to the embodiment here, those skilled in the art are according to announcement of the present invention, and the improvement of making for the present invention and amendment all should be within protection scope of the present invention.
Claims (10)
1. the large-diameter DTH air hammer with Sleeve drill, it is characterized in that: comprise large-diameter DTH air hammer (24), spiral conveying tube (2) and Sleeve drill (13), above element coaxial is arranged, described spiral conveying tube (2) overcoat is positioned at the outside of described large-diameter DTH air hammer (24), with transferring power with prevent from making described spiral conveying tube (2) and described large-diameter DTH air hammer (24) to be separated from each other in impact process, described Sleeve drill (13) is positioned at the outside of described spiral conveying tube (2).
2. the large-diameter DTH air hammer with Sleeve drill according to claim 1, it is characterized in that: described large-diameter DTH air hammer (24) comprises top connection (1), outer shell (3), piston (4), fairlead (5), snap ring (6), sealing ring (7), breathes out furan (8), lining (9), pad (10), lower contact (11) and drill bit (12), coaxially arranged successively with upper-part; described top connection (1) and described lower contact (11) are fixed and are connected with described outer shell (3) inwall by screw thread, described snap ring (6) is embedded in described outer shell (3) inwall, and described piston (4) is carried out to axial limiting and in cylinder body, fall down because of deadweight at piston (4) described in assembling drill bit is when (12) preventing, described fairlead (5) is fixed on described drill bit (12) centre bore by interference fit, make described piston (4) can vertically clash into described drill bit (12), described Kazakhstan furan (8) carries out axial location by described outer shell (3) inwall and described lining (9), and described drill bit (12) is played to position-limiting action, described sealing ring (7) is embedded in the groove of described Kazakhstan furan (8) outside, between described outer shell (3) and described Kazakhstan furan (8), seal, described pad (10) is positioned between described outer shell (3) and described lower contact (11), increase the active area of described outer shell (3) and described lower contact (11), described lower contact (11) passes to described drill bit (12) by spline fitted by power.
3. the large-diameter DTH air hammer with Sleeve drill according to claim 1, is characterized in that: described large-diameter DTH air hammer (24) is connected with transferring power with double power head (22) by drilling rod (23).
4. the large-diameter DTH air hammer with Sleeve drill according to claim 2, it is characterized in that: the diameter of described drill bit (12) bottom inserted tooth face is 574mm, top is 228mm with the diameter of piston (4) phase striking face, the diameter of center roof vent is 80mm, comprises external splines (17), 4 steam vents (18), 8 longitudinal slag-drip openings (19) and 4 transverse row cinder notch (20); (11 rectangle internal splines are connected with transmitting torque described external splines (17) with lower contact, dreg removing system at the bottom of described steam vent (18), described longitudinal slag-drip opening (19) and described transverse row cinder notch (20) composition hole, described steam vent (18) becomes 30 ° with drill bit (12) center roof vent, be arranged symmetrically with, make gas jet equably at the bottom of topped whole hole.
5. the large-diameter DTH air hammer with Sleeve drill according to claim 4, is characterized in that: described external splines (17) be shaped as rectangle, key is wide is 36mm;
Or the diameter of described steam vent (18) is 45mm;
Or the diameter of described longitudinal slag-drip opening (19) and described transverse row cinder notch (20) is 60mm, there is arc invaginating structure, be arranged symmetrically with.
6. the large-diameter DTH air hammer with Sleeve drill according to claim 2, it is characterized in that: described spiral conveying tube (2) comprises helix tube joint (14), spiral weld tabs (15) and steel pipe (16), described helix tube joint (14) is positioned at one end of described steel pipe (16), and described helix tube joint (14) and 4 described spiral weld tabs (15) are welded and fixed and are positioned on described steel pipe (16);
Or described spiral conveying tube (2) carries out interference fit with transferring power by the interior hexagonal structure of helix tube joint (14) and the outer-hexagonal structure of top connection (1).
7. the large-diameter DTH air hammer with Sleeve drill according to claim 6, is characterized in that: the internal diameter of described spiral weld tabs (15) is 406mm, and external diameter is 570mm, and pitch is 440mm;
Or the internal diameter of described steel pipe (16) is 375mm, external diameter is 405mm, and thickness is 15mm, and length is 1800mm;
Or described helix tube joint (14) has interior hexagonal structure, external diameter is 405mm, thickness is 50mm, the interior hexagon length of side is 127mm, can coordinate with the outer-hexagonal structure of top connection (1), make power be delivered to spiral conveying tube (2) from top connection (1).
8. the large-diameter DTH air hammer with Sleeve drill according to claim 1, is characterized in that: described Sleeve drill (13) top has through hole, and described Sleeve drill (13) lower surface is inlaid with brill tooth.
9. the large-diameter DTH air hammer with Sleeve drill according to claim 1, is characterized in that: described Sleeve drill (13) is connected with transferring power with the slewing equipment of double power head (22).
10. the large-diameter DTH air hammer with Sleeve drill according to claim 8, is characterized in that: the internal diameter of described Sleeve drill (13) is 600mm, and thickness is 20mm;
Or described brill tooth is that sheet is bored tooth (25) or spherical brill tooth (26).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410218494.0A CN104033101B (en) | 2014-05-22 | 2014-05-22 | A kind of large-diameter DTH air hammer with Sleeve drill |
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| CN201410218494.0A CN104033101B (en) | 2014-05-22 | 2014-05-22 | A kind of large-diameter DTH air hammer with Sleeve drill |
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| CN105401878A (en) * | 2015-12-03 | 2016-03-16 | 山河智能装备股份有限公司 | Drilling machine for large-diameter down hole hammer |
| CN105569563A (en) * | 2015-12-31 | 2016-05-11 | 长安大学 | Rotary drilling rig bit capable of impact drilling |
| CN108360980A (en) * | 2017-12-30 | 2018-08-03 | 天津市九方煤矿机械制造有限公司 | A kind of pneumatic roof bolter |
| CN111238085A (en) * | 2020-01-10 | 2020-06-05 | 中铁十二局集团建筑安装工程有限公司 | Ground source heat pump buried pipe construction method based on stratum formed by soil rock in alternation |
| CN112647839A (en) * | 2021-01-19 | 2021-04-13 | 贵阳云海岩土工程有限公司 | Self-rotating pneumatic down-the-hole hammer |
| CN113404424A (en) * | 2021-07-14 | 2021-09-17 | 深圳市工勘岩土集团有限公司 | Double-power rock breaking construction structure with full casing and down-the-hole hammer follow pipe |
| CN113482522A (en) * | 2021-08-09 | 2021-10-08 | 清远中科振宇机械有限公司 | Down-the-hole hammer pipe-following drilling tool and construction method thereof |
| CN113585959A (en) * | 2021-07-14 | 2021-11-02 | 深圳市工勘岩土集团有限公司 | Double-power rock breaking construction method for full casing pipe shoe and down-the-hole hammer pipe |
| CN113840975A (en) * | 2019-06-20 | 2021-12-24 | 山特维克矿山工程机械有限公司 | Down-the-hole drilling assembly and apparatus |
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