CN104481393A - Power transmission structure of rotary drilling rig - Google Patents
Power transmission structure of rotary drilling rig Download PDFInfo
- Publication number
- CN104481393A CN104481393A CN201410765514.6A CN201410765514A CN104481393A CN 104481393 A CN104481393 A CN 104481393A CN 201410765514 A CN201410765514 A CN 201410765514A CN 104481393 A CN104481393 A CN 104481393A
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- China
- Prior art keywords
- key bar
- actuating sleeve
- sleeve parts
- power transmission
- transmission structure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000005553 drilling Methods 0.000 title claims abstract description 58
- 230000005540 biological transmission Effects 0.000 title claims abstract description 24
- 238000010008 shearing Methods 0.000 claims description 21
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 230000003287 optical effect Effects 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 8
- 238000003466 welding Methods 0.000 abstract description 8
- 230000008439 repair process Effects 0.000 abstract description 5
- 238000005498 polishing Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 238000001125 extrusion Methods 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 12
- 239000000463 material Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 230000008719 thickening Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/03—Couplings; joints between drilling rod or pipe and drill motor or surface drive, e.g. between drilling rod and hammer
-
- 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
- E21B3/00—Rotary drilling
- E21B3/02—Surface drives for rotary drilling
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a power transmission structure of a rotary drilling rig. The power transmission structure of the rotary drilling rig comprises a drill rod (2), a driving sleeve part (3) arranged in a piling mechanical power head, and an internal key strip (1), wherein the internal key strip is detachable and is arranged on the internal cylindrical surface of the driving sleeve part; the drill rod is arranged in a circular pipe of the driving sleeve part; the external cylindrical surface of the drill rod is provided with an external key strip which is matched with the internal key strip for use. When the contact parts of the key strips are excessively worn, the internal key strip is only replaced rapidly and effectively, and the repair work such as polishing and welding are not needed, so that the equipment maintenance time is reduced; furthermore, after the internal key strip is replaced, the position and the size accuracy of the internal key strip are guaranteed, the accuracy of the replaced internal key strip is much higher than that of the repaired internal key strip, and the operation efficiency and the subsequent using effect are improved. The local cross section of the external key strip of the drill rod is properly thickened, so that the local extrusion stress of the contact areas of the key strips in the power delivery period is effectively reduced, the phenomena of fatigue and wear can be relieved, the fault-free operation time of the whole machine is prolonged, and the performance of a mainframe is reliable.
Description
Technical field
The present invention relates to a kind of piling machinery, specifically a kind of for the rotary drilling rig power transmission structure between unit head and drilling rod, belong to a construction equipment technical field.
Background technology
At present, various ground foundation engineering construction equipment, perpendicular in the pore-forming operation process of ground concrete castinplace pile, needed for such construction equipment function, its structure all primarily of unit head and drilling rod composition, in order to the efficient transmission of power during completing boring.And according to the difference of practice of construction geological conditions, by the difference of partial structurtes, existing drilling rod can be divided into " friction type drilling rod " and " machine locking-type drilling rod ".But be no matter the drilling rod of " friction type " or " machine locking-type " structure, in practice of construction process, all can realize the reliable delivery of power between unit head, the stable performance of associated components, easy to operate, efficiency of construction is high, is deeply subject to the welcome of market users.
But, in the structure of above-mentioned critical piece, the inner cylinder face being arranged on the actuating sleeve parts in unit head is provided with internal key bar, drilling rod external cylindrical surface be provided with built-in bar with the use of external key bar, the actuating sleeve parts in unit head with coordinate by inside and outside key bar between drilling rod the reliable delivery realizing power.In work progress, once there is excessive wear in the position that key bar contacts, no matter be Inner key bar or external key bar, because it is all welding as one with associated components, therefore will damaged contact surface be caused all cannot to change fast and effectively, equipment must be made to stop operation immediately and polished, REPAIR WELDING.And maintenance needed for time longer, the reparation precision formed is lower, has had a strong impact on operating efficiency and follow-up result of use.
Summary of the invention
For above-mentioned prior art Problems existing, the invention provides a kind of rotary drilling rig power transmission structure, can carry out the Inner key bar be arranged in actuating sleeve parts changing in time fast, drilling rod upper end external key bar local section suitably thickeies (increase material), during power transmission, the local compression stress of key bar contact area, is effectively alleviated, and can alleviate its tired and wear phenomenon, extend the complete machine trouble-free activity duration, guarantee the dependable performance of main frame.
To achieve these goals, a kind of rotary drilling rig power transmission structure that the present invention adopts, comprise drilling rod and be arranged on the actuating sleeve parts in piling machinery unit head, also comprise built-in bar, described internal key bar is detachable and be arranged on actuating sleeve parts inner cylinder face, described drilling rod is arranged in the pipe of actuating sleeve parts, the external cylindrical surface of drilling rod be provided with built-in bar with the use of external key bar.
Also comprise shearing resistance cover, described shearing resistance cover is arranged between internal key bar and actuating sleeve parts.
Described internal key bar is arranged on the inner cylinder face of actuating sleeve parts by screw and lock washer.
Described actuating sleeve parts comprise pipe and flange, and described flange is welded on the position, middle and lower part of pipe external cylindrical surface, flange has some screwed holes and circular hole; Described pipe is through precision optical machinery machine-shaping, and boss structure is left at the external cylindrical surface position overlapped with flange, and uniform three place's grooves on inner cylinder face, bottom portion of groove is plane structure.
Described Inner key bar is arranged in the groove on actuating sleeve parts inner cylinder face, and is connected with adopting embedded connected mode between actuating sleeve parts; Described Inner key bar is symmetrical structure, and the structure of its size and groove matches.
The middle position of described actuating sleeve parts further groove width, have several sizes are identical, spacing is equal counterbore and screwed hole from top to bottom, the through hole that described Inner key bar Central Symmetry face has counterbore and is used in combination with groove upper screwed hole.
The two ends of described shearing resistance cover embed in the counterbore of actuating sleeve parts and the counterbore of Inner key bar side respectively.
Described drilling rod is that more piece is nested in together and telescopic build-up member, often saves drilling rod and includes corresponding external key bar, seamless steel pipe and Inner key, according to the difference of relative position, three requires that inside and outside circle cylinder corresponding with seamless steel pipe is respectively integrally welded; The external key bar that outermost one saves drilling rod upper end takes local thickening measure, increases by more than 20% with the real contact area of built-in bar.
Compared with prior art, the present invention is by the mounting means of change Inner key bar, by being welded to connect of former actuating sleeve parts and Inner key bar, change dismountable mounting means into, preferred embedded dismountable mode connects, on the one hand, adopt this connected mode, when there is excessive wear in the position that key bar contacts, only equipment need be made to stop operation immediately, can change fast and effectively built-in bar, without the need to polishing again, the reparations such as welding, decrease the time of maintenance of equipment, and its change after the position of internal key bar and dimensional accuracy secure, more much higher than the precision of repairing, improve operating efficiency and follow-up result of use, on the other hand, also necessary condition is created for the local thickness of most acromere drilling rod external key bar increases, and the local thickness of most acromere drilling rod external key bar will increase its real area contacted with Inner key bar, and then effectively can reduce relative keys bar localized contact stress in power transmission process, alleviate the fatigue of key strip material, the degree of wearing and tearing to greatest extent, improve and extend reliability and the application life of this equipment, and Inner key bar is designed to the structure of full symmetric, when the damage of its side, when cannot continuing construction, can change opposite side is at once work plane, convenient and swift, and its operating efficiency is able to effective raising.In addition, the introducing of shearing resistance nested structure between actuating sleeve parts and Inner key bar, its two ends embed in the counterbore of actuating sleeve and the counterbore of Inner key bar side respectively, not only can guarantee the reliable delivery of the normal moment of torsion of this equipment, even if there is the pressurization drilling condition of " machine locking-type " drilling rod, the pressure loading produced is born primarily of shearing resistance cover, will not cause loosening of trip bolt.This structural maintenance is easy, have higher promotional value.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 be in Fig. 1 A-A to schematic cross-section;
Fig. 3 is the close-up schematic view at I place in Fig. 1;
Fig. 4 be in Fig. 2 C-C to cross section use figure.
In figure: 1, internal key bar, 2, drilling rod, 3, actuating sleeve parts, 4, shearing resistance cover, 5, lock washer, 6, screw.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figures 1 to 4, a kind of rotary drilling rig power transmission structure, comprise drilling rod 2, be arranged on actuating sleeve parts 3 in piling machinery unit head and built-in bar 1, described internal key bar 1 is detachable and be arranged on actuating sleeve parts 3 inner cylinder face, described drilling rod 2 is arranged in the pipe of actuating sleeve parts 3, the external cylindrical surface of drilling rod 2 be provided with built-in bar 1 with the use of external key bar.
During work, because built-in bar 1 is detachably arranged on actuating sleeve parts 3 inner cylinder face, when this key bar transmitted load (power) period, when there is excessive wear in the position of frequent contact, only equipment need be made to stop operation immediately, can change fast and effectively built-in bar 1, without the need to carrying out the reparation such as field polish, welding again, decrease the time of maintenance of equipment, and its change after the position of internal key bar 1 and dimensional accuracy secure, more much higher than the precision of field repair, improve operating efficiency and follow-up result of use.Consider the transmission of power, be connected by Embedded mode between described built-in bar 1 with driving key member 3.
Preferably, shearing resistance cover 4 also can be installed between internal key bar 1 and actuating sleeve parts 3.In stake construction equipment normal drill (construction) period, driving force (moment of torsion) from unit head is delivered on drilling rod 2 (along with the progressively increase of transmitted load by means of actuating sleeve parts 3, shearing resistance cover 4, Inner key bar 1, the side of Inner key bar 1 contacts with actuating sleeve parts 3 region, also the transmission of power can be participated in), and continue to drive associated components to rotate, complete the operation function of expection.When using " machine locking-type " drilling rod and implement " pressurization is crept into " operation, its plus-pressure (load) is balanced with the frictional force of actuating sleeve parts 3 contact area primarily of shearing resistance cover 4 and Inner key bar 1, guarantees to cause loosening of annexation between them.
Above-mentioned internal key bar 1, can be connected with lock washer 5 by screw 6 between shearing resistance cover 4 and actuating sleeve parts 3, the mode adopting screw to connect connects, be more convenient for dismantling, as when this key bar transmitted load the position that contacts there is excessive wear time, only need stop operation, fast by screw disassembling, and internal key bar 1 is changed, without the need to carrying out manual polishing to it again, the repairs such as welding, further reduce the time of maintenance of equipment and shutdown, and its change after the position of internal key bar 1 and dimensional accuracy secure, more much higher than the precision of field repair, further increase operating efficiency and follow-up result of use.And the setting of lock washer 5 can effectively prevent screw 6 and shearing resistance from overlapping 4, loosen between Inner key bar 1, fixing illusive situation, described lock washer 5 can adopt applicable extraordinary lock washer.
Preferably, above-mentioned actuating sleeve parts 3 comprise pipe and flange, and described flange is welded on the position, middle and lower part of pipe external cylindrical surface, flange has some screwed holes and circular hole; Described pipe is through precision optical machinery machine-shaping, and in order to avoid welding stress is on the impact of pipe comprehensive mechanical performance, boss structure is left at the external cylindrical surface position overlapped with flange, and uniform three place's grooves on pipe inner cylinder face, bottom portion of groove is plane structure.
Preferably, above-mentioned Inner key bar 1 is arranged in the groove on actuating sleeve parts 3 inner cylinder face, and is connected with adopting embedded connected mode between actuating sleeve parts 3; Described Inner key bar 1 is symmetrical structure, and the structure of its size and groove matches.Specifically, described Inner key bar 1 adopts rectangular plate type structure, and the side that its thickness direction is corresponding with baseplane is arc surface, and actuating sleeve parts 3 integrally mounted after, the axis of its cambered surface and pipe dead in line; In cambered surface unilateral observation, the length of its rectangle is consistent with driving the height of pipe in key member 3, and width keeps matching with pipe inner groovy.This laminating between described Inner key bar 1 and driving key member 3 is more conducive to the transmission of power.
In order to improve the transmission of power further, guarantee that Inner key bar 1 is connected with driving key member 3 more stable, can in the middle position of actuating sleeve parts 3 further groove width, have several sizes from top to bottom identical, the counterbore that spacing is equal and screwed hole, and the through hole offered counterbore and be used in combination with groove upper screwed hole on described Inner key bar 1 Central Symmetry face, specifically the middle part of each axis is through hole, the both sides of Inner key bar 1 thickness are the counterbore of different-diameter, the position of its axis is coordinated mutually with the counterbore of above-mentioned actuating sleeve parts 3 and screwed hole, its spacing is also identical with pipe relevant parameter.
Based on said structure, the two ends of described shearing resistance cover 4 embed in the counterbore of actuating sleeve parts 3 and the counterbore of Inner key bar 1 side respectively.The introducing of this structure shearing resistance cover 4, not only can guarantee the reliable delivery of the normal moment of torsion of this equipment, even if there is the pressurization drilling condition of " machine locking-type " drilling rod, the pressure loading produced also is born primarily of shearing resistance cover, will not cause loosening of trip bolt, stability is higher.
Described drilling rod 2 is nested in together and telescopic build-up member for more piece, often save drilling rod and include external key bar, seamless steel pipe and Inner key, according to the difference of relative position, three requires that inside and outside circle cylinder corresponding with seamless steel pipe is respectively integrally welded, without built-in on the certainly interior joint; Simultaneously, the external key bar that can save drilling rod upper end to outermost one carries out the measure of partial thickening (increase material), its real area contacted with Inner key bar 1 is made to increase by more than 20%, effectively can reduce duration of work like this to contact the extrusion stress of region material, thus greatly alleviate fatigue and the degree of wear of key bar work plane, for the reliability improving a construction equipment has further established sturdy basis.Certainly, other multiple different component are also welded in the outside of seamless steel pipe simultaneously, and the flange for connecting is contained in the upper end as outermost one joint, and the two ends of the interior joint are respectively containing hanger and square head structure, and all the other respectively save similar.
During installation, can first actuating sleeve parts 3 be arranged in the power head part of rotary drilling rig equipment, then in the counterbore in actuating sleeve parts 3 groove, shearing resistance cover 4 is installed one by one, again Inner key bar 1, lock washer 5 and screw 6 are installed successively, and by the screw-down torque of regulation fastening it, final drilling rod 2 is installed.
From said structure, the present invention is by the mounting means of change Inner key bar, by being welded to connect of former actuating sleeve parts and Inner key bar, change dismountable mounting means into, preferred embedded dismountable mode connects, on the one hand, adopt this connected mode, when there is excessive wear in the position that key bar contacts during equipment construction, only equipment need be made to stop operation immediately, can change fast and effectively built-in bar, without the need to carrying out on-the-spot manual polishing again, the reparations such as welding, decrease the time of maintenance of equipment and shutdown, and its change after the position of internal key bar and dimensional accuracy secure, more much higher than the precision of repairing, improve operating efficiency and follow-up result of use, on the other hand, owing to eliminating the attachment weld between former actuating sleeve parts and Inner key bar, also necessary condition is created for the local thickness of most acromere drilling rod external key bar increases, and the local thickness of most acromere drilling rod external key bar will increase its area of contacting actual in Inner key bar, and then effectively can reduce relative keys bar localized contact stress in power transmission process, alleviate the fatigue of key strip material, the degree of wearing and tearing to greatest extent, and Inner key bar is designed to the structure of full symmetric, when the damage of its side, when cannot continuing construction, can change opposite side is at once work plane, convenient and swift, and its operating efficiency is able to effective raising.In addition, the introducing of shearing resistance nested structure between actuating sleeve parts and Inner key bar, its two ends embed in the counterbore of actuating sleeve and the counterbore of Inner key bar side respectively, not only can guarantee the reliable delivery of the normal moment of torsion of this equipment, even if there is the pressurization drilling condition of " machine locking-type " drilling rod, pressure (shearing) the power load produced is born primarily of shearing resistance cover, will not cause loosening of trip bolt.This structural maintenance is easy, have higher promotional value.
Claims (8)
1. a rotary drilling rig power transmission structure, comprise drilling rod (2) and be arranged on the actuating sleeve parts (3) in piling machinery unit head, it is characterized in that, also comprise built-in bar (1), described internal key bar (1) is detachable and be arranged on actuating sleeve parts (3) inner cylinder face, described drilling rod (2) is arranged in the pipe of actuating sleeve parts (3), the external cylindrical surface of drilling rod (2) be provided with built-in bar (1) with the use of external key bar.
2. a kind of rotary drilling rig power transmission structure according to claim 1, is characterized in that, also comprises shearing resistance cover (4), and described shearing resistance cover (4) is arranged between internal key bar (1) and actuating sleeve parts (3).
3. a kind of rotary drilling rig power transmission structure according to claim 1 and 2, it is characterized in that, described internal key bar (1) is arranged on the inner cylinder face side of actuating sleeve parts (3) by screw (6) and lock washer (5).
4. a kind of rotary drilling rig power transmission structure according to claim 3, it is characterized in that, described actuating sleeve parts (3) comprise pipe and flange, and described flange is welded on the position, middle and lower part of pipe external cylindrical surface, flange has some screwed holes and circular hole; Described pipe is through precision optical machinery machine-shaping, and boss structure is left at the external cylindrical surface position overlapped with flange, and uniform three place's grooves on inner cylinder face, bottom portion of groove is plane structure.
5. a kind of rotary drilling rig power transmission structure according to claim 4, it is characterized in that, described Inner key bar (1) is arranged in the groove on actuating sleeve parts (3) inner cylinder face, and adopts embedded connected mode to be connected with between actuating sleeve parts (3); Described Inner key bar (1) is symmetrical structure, and the structure of its size and groove matches.
6. a kind of rotary drilling rig power transmission structure according to claim 5, it is characterized in that, the middle position of described actuating sleeve parts (3) further groove width, have several sizes are identical, spacing is equal counterbore and screwed hole from top to bottom, the through hole that described Inner key bar (1) Central Symmetry face has counterbore and is used in combination with groove upper screwed hole.
7. a kind of rotary drilling rig power transmission structure according to claim 6, is characterized in that, the two ends of described shearing resistance cover (4) embed in the counterbore of actuating sleeve parts (3) and the counterbore of Inner key bar (1) side respectively.
8. a kind of rotary drilling rig power transmission structure according to claim 1,2 or 3, it is characterized in that, described drilling rod (2) is nested in together and telescopic build-up member for more piece, often save drilling rod and include external key bar, seamless steel pipe and Inner key, according to the difference of relative position, three requires that inside and outside circle cylinder corresponding with seamless steel pipe is respectively integrally welded; The real contact area of external key bar and built-in bar (1) that outermost one saves drilling rod upper end increases by more than 20%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410765514.6A CN104481393A (en) | 2014-12-12 | 2014-12-12 | Power transmission structure of rotary drilling rig |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410765514.6A CN104481393A (en) | 2014-12-12 | 2014-12-12 | Power transmission structure of rotary drilling rig |
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| Publication Number | Publication Date |
|---|---|
| CN104481393A true CN104481393A (en) | 2015-04-01 |
Family
ID=52755985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410765514.6A Pending CN104481393A (en) | 2014-12-12 | 2014-12-12 | Power transmission structure of rotary drilling rig |
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| CN (1) | CN104481393A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104929511A (en) * | 2015-07-15 | 2015-09-23 | 孙卫香 | Hole digging machine with water collecting hole and contact sensor |
| CN104963623A (en) * | 2015-07-15 | 2015-10-07 | 孙卫香 | Hole digging machine with water collecting hole and safe in operating |
| CN105089490A (en) * | 2015-07-15 | 2015-11-25 | 江山市飞龙进出口有限公司 | Hole digging machine with rainproof and dustproof functions |
| CN105178841A (en) * | 2015-07-15 | 2015-12-23 | 孙卫香 | Hole digging machine with water collecting hole |
| CN105507810A (en) * | 2015-07-15 | 2016-04-20 | 义乌市披克亚进出口有限公司 | Hole digging machine with vibration reducing function |
| CN107429549A (en) * | 2015-04-02 | 2017-12-01 | 山特维克知识产权股份有限公司 | Scalable cylinder, drill bit and method |
| CN109826570A (en) * | 2019-04-03 | 2019-05-31 | 郑州富岛机械设备有限公司 | A kind of New drilling machine reducing drilling rod |
| CN110761704A (en) * | 2019-11-12 | 2020-02-07 | 徐州健川机械制造有限公司 | Power head of rotary drilling rig |
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| CN201567950U (en) * | 2009-11-25 | 2010-09-01 | 于庆达 | Auger drill power head capable of being provided with various specifications and types of drill rods |
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| CN203531763U (en) * | 2013-10-31 | 2014-04-09 | 上海中联重科桩工机械有限公司 | Drill rod and rotary drilling rig |
| CN203948045U (en) * | 2014-06-17 | 2014-11-19 | 北京市三一重机有限公司 | Key cover, wheel hub, unit head and rotary drilling rig |
| CN204754763U (en) * | 2014-12-12 | 2015-11-11 | 徐州徐工基础工程机械有限公司 | Dig rig power transmission structure soon |
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| DE2251652C2 (en) * | 1971-10-20 | 1983-01-27 | The Robbins Co., Seattle, Wash. | Drilling apparatus and method for facilitating access to internal components of a drilling apparatus |
| CN201056981Y (en) * | 2007-07-09 | 2008-05-07 | 北京市三一重机有限公司 | Power head key sleeve |
| CN201567950U (en) * | 2009-11-25 | 2010-09-01 | 于庆达 | Auger drill power head capable of being provided with various specifications and types of drill rods |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107429549A (en) * | 2015-04-02 | 2017-12-01 | 山特维克知识产权股份有限公司 | Scalable cylinder, drill bit and method |
| CN104929511A (en) * | 2015-07-15 | 2015-09-23 | 孙卫香 | Hole digging machine with water collecting hole and contact sensor |
| CN104963623A (en) * | 2015-07-15 | 2015-10-07 | 孙卫香 | Hole digging machine with water collecting hole and safe in operating |
| CN105089490A (en) * | 2015-07-15 | 2015-11-25 | 江山市飞龙进出口有限公司 | Hole digging machine with rainproof and dustproof functions |
| CN105178841A (en) * | 2015-07-15 | 2015-12-23 | 孙卫香 | Hole digging machine with water collecting hole |
| CN105507810A (en) * | 2015-07-15 | 2016-04-20 | 义乌市披克亚进出口有限公司 | Hole digging machine with vibration reducing function |
| CN109826570A (en) * | 2019-04-03 | 2019-05-31 | 郑州富岛机械设备有限公司 | A kind of New drilling machine reducing drilling rod |
| CN109826570B (en) * | 2019-04-03 | 2024-05-14 | 郑州富岛机械设备有限公司 | Novel rotary drilling rig diameter-variable drill rod |
| CN110761704A (en) * | 2019-11-12 | 2020-02-07 | 徐州健川机械制造有限公司 | Power head of rotary drilling rig |
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Application publication date: 20150401 |