CN201786252U - Rotation-revolution combined down-hole hammer - Google Patents
Rotation-revolution combined down-hole hammer Download PDFInfo
- Publication number
- CN201786252U CN201786252U CN 201020550985 CN201020550985U CN201786252U CN 201786252 U CN201786252 U CN 201786252U CN 201020550985 CN201020550985 CN 201020550985 CN 201020550985 U CN201020550985 U CN 201020550985U CN 201786252 U CN201786252 U CN 201786252U
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- China
- Prior art keywords
- impactor
- hole hammer
- combined type
- sun
- hammer
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- Expired - Lifetime
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/16—Plural down-hole drives, e.g. for combined percussion and rotary drilling; Drives for multi-bit drilling units
Abstract
The utility model discloses a rotation-revolution combined down-hole hammer, wherein a cylindrical guidance sleeve (47) is provided at the front end of the body (42) of the impactor (4), a cylindrical guidance shaft (49) of the impact drill (45) is inserted into the cylindrical guidance sleeve (47) at the front end of the body (42) of the impactor and is positioned using the opposite position limiting ring (48). Therefore, the impact drill can be mounted onto the body (42) of the impactor in axial movement and coaxial rotation. The impact drill of the impactor is capable of relative rotation. When the combined down-hole hammer rotates to make holes, a plurality of impactors with little diameter revolves while rotates, and a damp modulation ring is provided inside the air dispensing device. The utility model is a combined down-hole hammer making the abrasion of hard alloy head on the impactor drill balanced, capable of enhancing working efficiency and life, having relatively low cost, reasonable structure, easy maintenance, convenient assembling and disassembling, reliable sealing, energy saving, high poring efficiency, and long life.
Description
Technical field
The utility model relates to a kind of pile foundation construction machinery, specifically, but relates to a kind of can the hammer into shape at the combined type down-the-hole of hardpan and rock stratum punching, the rotation of constructing foundation pile and revolution.
Background technology
Foundation pile construction uses rig to drive drill bit at earth-boring usually, puts reinforcing cage, concrete placing then in the hole, becomes foundation pile after the concrete setting; But run into hardpan particularly during the rock stratum, very difficult with bit bore, and to use a kind of impactor (also claiming the down-the-hole hammer) to carry out percussion drilling, because impactor has the function in the punching of hard rock floor height efficient, thereby in mining, construction foundation working, be widely used.
This by known (" Chinese winning equipment handbook-first volume " the 1st chapter of publishing as Science Press the 66th page～the 68th page deliver) impactor, also be commonly referred to as monolithic down-the-hole hammer 220 in the industry, mainly by taper thread joint 221, contain impact piston 223, spline housing 226 and split the impactor body 222 of locating ring 224, the drill hammer 227 that has hard alloy head 228 and a guiding splined shaft 225 is formed, as Figure 13 and shown in Figure 14, its diameter is general≤φ 300mm.The down-the-hole hammer is connected with the unit head of rig by hollow drill during construction, unit head drives impactor body 222 rotations of down-the-hole hammer, by spline housing 226 and guiding splined shaft 225, drill hammer can rotate with the impactor body with moving axially synchronously, the compressed air that is provided by air compressor machine enters the impactor body by drilling rod, the driven plunger high-frequency is back and forth hit drill bit, impact energy is passed on and is back and forth impacted rock to the drill bit hard alloy head and make it broken, the gas that the disintegrating slag of rock is discharged with the down-the-hole hammer is discharged by the annular gap between drilling rod and the hole wall, the final stake hole that forms.
Its advantage is: particularly can high efficiency punch the rock stratum at hardpan, but development along with the pile foundation construction industry, when punching had more demand to major diameter foundation pile (φ 500～φ 800mm and＞φ 1000mm), this monolithic down-the-hole hammer showed following deficiency:
1, the requirement of major diameter monolithic down-the-hole hammer processing technology is high, manufacture difficulty greatly, easily goes out quality problems, manufacturing cost is higher;
2, because volume is heavy greatly again, maintenance and repair inconvenience in case certain alloy head breakage on the drill bit in the work just must integral body be pulled down and reprocessed, promptly delays the duration, and expense is also higher;
3,, connect the whole rotation of needs in the mode of taper thread joint, and need very big moment of torsion just can tighten and make it to reach required sealing, installing/dismounting inconvenience at the scene because big, the quality of diameter is heavy.
For solving the above-mentioned deficiency of major diameter monolithic down-the-hole hammer, United States Patent (USP): US 4429439 has announced another kind of cluster type down-the-hole hammer; As Figure 17 and shown in Figure 180, the impactor of 5 minor diameters constitutes large diameter down-the-hole hammer by the framework boundling together, be connected with drilling rod and air inlet road by the taper thread joint, and compressed air be assigned to each little impactor, drive it and carry out the percussion drilling operation by horizontal gas circuit.
But the weak point of this boundling down-the-hole hammer is:
1, because boundling down-the-hole hammer diameter is big, quality heavy, the mode with the taper thread joint connects the whole rotation of needs equally, and need very big moment of torsion just can tighten and make it to reach required sealing, installing/dismounting inconvenience at the scene;
The turning was close to the right angle when 2, compressed air entered impactor by horizontal gas circuit, and the pressure loss is big, and efficient is low;
3, according to the layout of minor diameter impactor, the impactor of the impactor ratio periphery at center is under same rotating condition, the perforated area difference that is covered, frequency of impact (acting) should be different, but identical, the flow of air pressure is divided equally in its gas circuit, do not have regulatory function, can not effectively utilize energy, efficient is low.
4, when boundling down-the-hole hammer rotation punching, the outside left that is arranged in the drill hammer on the minor diameter impactor of periphery is different with the peripheral velocity of inside line, acting is different, the wearing and tearing of the hard alloy head that distributes on the drill hammer are also different, the wearing and tearing of hard alloy head in the outside are faster than the inboard, work unbalanced and whole service life is low.
5, in order to overcome above-mentioned 4 shortcoming, when lateral wearing occurs outside the drill hammer, the minor diameter impactor that needs to be arranged in periphery all disassembles, the Rotate 180 degree is installed back again, though can solve the unbalanced problem of wearing and tearing like this, but installing/dismounting inconvenience at the scene, and can influence construction speed.
The utility model content
Technical problem to be solved in the utility model provides and a kind ofly makes the hard alloy head wearing and tearing on the drill hammer be tending towards balanced, can increase work efficiency and the combined type of the revolution certainly down-the-hole hammer in application life.
In order to solve technical problem of the present utility model, the combined type of the revolution certainly down-the-hole hammer that the utility model provides, comprise hookup, stake body, divide device of air and the impactor that is installed in several minor diameters on the stake body, the front end of the impactor body of described impactor is provided with cylindrical fairlead, the neck of drill hammer is the cylindrical axis of guide, the cylindrical axis of guide of described drill hammer inserts in the cylindrical fairlead of described impactor body front end and by the spacing ring location of splitting, and described drill hammer be can be axially rotatably and coaxially installed on the described impactor body.
The joint of described impactor is the cylinder joint of band positioning ring groove and seal groove, and several described impactors insert the upper plate of stake body and the locating hole of base plate respectively, are connected the location with stake body by the locating ring of splitting, stop collar, back-up ring, jump ring; Insert in the transition pore of described minute device of air the end of described cylinder joint, the sealing ring of packing in described seal groove sealing.
Divide device of air one end to be connected with described hookup, the other end is connected with described stake body, device of air was provided with the collection chamber that is communicated with feeder in described minute, described collection chamber is communicated with described impactor respectively by branch gas circuit suitable with the quantity of described impactor and the transition pore that is located at described minute gas circuit exit, and described minute gas circuit is the deep camber pipeline structure and leads directly to described impactor from upper top.
Also be provided with as required respectively the damping adjustable ring of the different size that the air feed parameter to each described impactor controls to adjust in the transition pore in described minute gas circuit exit.
Described hookup is the cylindricality fittings body, and the cylindricality joint of described cylindricality fittings body and drilling rod is pegged graft and fixed by at least one bearing pin and sealing mat.
Described cylindricality fittings body is the hexahedron column construction, pegs graft fixing by interior six square joints of 2 bearing pins and sealing mat and drilling rod.
Described several minor diameter impactors are separately positioned on middle part and peripheral part at stake body, and the minor diameter impactor that is arranged on the middle part is except that being installed at the center, also can departing from center installation.
Combined type down-the-hole hammer of the present utility model and job practices thereof have following good effect and advantage:
1, according to the utility model, constitute large diameter combined type down-the-hole hammer by the impactor of several minor diameters, it is rational in infrastructure, manufacturing process is simple, maintenance is easy, cost is low;
2, according to the utility model, when unit head drives combined type down-the-hole hammer rotation punching, the drill hammer of the impactor of minor diameter is all right rotation when revolving round the sun thereupon, makes the hard alloy head wearing and tearing on the drill hammer be tending towards balanced, can increase work efficiency and application life;
3, according to the utility model, combined type down-the-hole hammer is fixed by bearing pin and sealing mat grafting with adopting the hexahedron joint being connected of drilling rod, and the reliability of easy installation and removal, gas circuit sealing improves;
4, according to the utility model, straight-through minute gas circuit straight-through or the deep camber design makes carries that the compressed air pressure loss is little, efficient is high;
5, according to the utility model, can be according to on-the-spot geological conditions, install adjust collection chamber divide damping adjustable ring in the gas circuit, to each impactor reasonable distribution air pressure tolerance, effectively utilize energy, improve perforating efficiency.
6, according to the utility model, use auger stem and combined type down-the-hole hammer supporting, under the condition of identical air demand, the deslagging better effects if, the dark hole of can sounding the night watches, efficiency of construction is higher, and is more economical;
7, according to construction method step of the present utility model, can be in hardpan rock stratum particularly, carry out the construction of major diameter (φ 500～φ 800mm and＞φ 1000mm) foundation pile expeditiously.
In sum, the utility model is a kind ofly to make the hard alloy head wearing and tearing on the drill hammer be tending towards balanced, can increase work efficiency and application life and cost is lower, rational in infrastructure, safeguard easily, easy installation and removal, sealing reliably, effectively utilize energy, perforating efficiency height, long service life the combined type of revolution certainly down-the-hole hammer its mode of occupation method simple and fast.
Description of drawings
Fig. 1 is embodiment 1 of the present utility model, the front view of combined type down-the-hole hammer.
Fig. 2 is the sectional view from the combined type down-the-hole hammer that revolves round the sun shown in Figure 1.
Fig. 3 is the vertical view from the combined type down-the-hole hammer that revolves round the sun shown in Figure 1.
Fig. 4 is the upward view from the combined type down-the-hole hammer that revolves round the sun shown in Figure 1.
Fig. 5 is the schematic diagram that is connected with drilling rod from the combined type down-the-hole hammer that revolves round the sun shown in Figure 1.
Fig. 6 is the schematic diagram that is connected with auger stem from the combined type down-the-hole hammer that revolves round the sun shown in Figure 1.
Fig. 7, Fig. 8, Fig. 9, Figure 10, Figure 11, Figure 12 are the schematic diagrames from the combined type down-the-hole hammer construction method step that revolves round the sun of the present utility model.
Figure 13 is the structure chart of the monolithic down-the-hole hammer of prior art.
Figure 14 is along the E-E line cut-away view among Figure 13.
Figure 15 is the structure chart of impactor of the present utility model.
Figure 16 is along the F-F line cut-away view among Figure 15.
Figure 17 is the schematic diagram of the cluster type down-the-hole hammer of prior art.
Figure 18 is that the G of Figure 17 is to view.
The specific embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Embodiment 1: a kind of from the combined type down-the-hole hammer that revolves round the sun:
With reference to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Figure 15 and Figure 16.
A kind of combined type down-the-hole hammer 110 that revolves round the sun certainly comprises: the impactor 4 of hookup 1, branch device of air 2, stake body 3 and several minor diameters.
Above-mentioned hookup 1 mainly is made of fittings body 11, flange 12, bearing pin 13, sealing mat 14; Divide device of air 2 mainly to constitute by collection chamber 21, branch gas circuit 22, transition pore 23, flange 24; Stake body 3 is made of rebound with holes 31, the base plate 34 that has locating hole and keyway 32 and dust ring 33, the upper plate 35 that has locating hole and housing 36; Impactor 4 mainly is made up of joint 41, the impactor body 42 that contains piston 410, positioning key 43 and the drill hammer 45 that has a hard alloy head 44.
The fittings body 11 of described hookup 1 is the hexahedron structure, pegs graft fixing by 2 bearing pins 13 and sealing mat 14 with interior six square joints 51 of drilling rod 5; (seeing Fig. 1, Fig. 2, Fig. 3)
The branch gas circuit 22 of described minute device of air 2 be the deep camber pipeline structure and also from the top straight-through impactor 4, the smooth and easy pressure loss of air feed is little, also be provided with the damping adjustable ring 26 of different size in the transition pore 23 in branch gas circuit 22 exits, can divide device of air 2 to be connected and fixed with hookup 1 as required respectively to the air feed parameter control and regulation of each impactor 4 by bolt 27, joint ring 25; (see figure 2)
The joint 41 of described impactor 4 is cylinders of band positioning ring groove 42 and seal groove 43, several impactors 4 are connected the location by the locating ring of splitting 61, stop collar 62, back-up ring 63, jump ring 64 with stake body 3 after inserting the locating hole of the upper plate 35 of stake body 3 and base plate 34 respectively; Insert in the transition pore 23 that divides device of air 2 end of cylinder joint 41, and the sealing ring 65 of packing in the seal groove 43 seals, and is connected and fixed by bolt 37 and the flange 24 that divides device of air 2; (see Figure 15, Figure 16, Fig. 2)
Described be installed in stake body 3 middle parts and peripheral part the impactor body 42 of several minor diameter impactors 4, the spacing ring 48 that its front end is provided with cylindrical fairlead 47, splits, drill hammer 45 necks are the cylindrical axis of guide 49, the cylindrical axis of guide 49 of drill hammer 45 inserts in the cylindrical fairlead 47 of impactor bodies 42 front ends and by spacing ring 48 location of splitting, and drill hammer 45 be can be axially rotatably and coaxially installed on the impactor body 42.(seeing Figure 15 and Figure 16)
Embodiment 2: use the job practices from the combined type down-the-hole hammer 110 that revolves round the sun.
With reference to Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Figure 10, Figure 11 and Figure 12.Use job practices, have following steps from the combined type down-the-hole hammer 110 that revolves round the sun:
1. rig 330 travelings that have unit head 7, air supply system 8, a hollow cylindrical drilling rod 5 are to construction location, peg graft fixing by 2 bearing pins 13 and the sealing mat 14 combined type down-the-hole hammer 110 that will revolve round the sun certainly with drilling rod 5; (seeing Fig. 5, Fig. 7)
2. start the unit head 7 of rig 330, drive drilling rod 5, revolve round the sun combined type down-the-hole hammer 110 by turning clockwise certainly, behind the alignment hole position, starting air supply system 8 provides compressed air-driven each impactor 4 actions from the combined type down-the-hole hammer 110 that revolves round the sun; Unit head 7 descends, and rotates to underground high-frequency percussion drilling while drive from the combined type down-the-hole hammer 110 that revolves round the sun, and disintegrating slag is expelled to ground with the exhaust airstream of impactor 4 by the annular gap between drilling rod 5 and the hole wall; (see figure 8)
3. punch to desired depth, and abundant deslagging; (see figure 9)
4. unit head 7 upwards promotes, and the combined type down-the-hole that revolves round the sun certainly hammer 110 also is promoted to ground thereupon; (see figure 10)
5. rig 330 is to moving on one side, and Xiang Kongzhong puts into reinforcing cage, concrete perfusion, after a period of time solidifies, promptly becomes the underground foundation stake; (seeing Figure 11, Figure 12)
6. rig 330 travelings repeat above step to next construction location.(seeing Figure 12)
According to on-the-spot geological conditions and actual air feed parameter, can adjust the damping adjustable ring 26 that different size is installed, the reasonable distribution air-flow, effectively utilize energy, improve perforating efficiency.(see figure 2)
Except the drilling rod 5 that can use hollow cylindrical, can also use the auger stem 10 of hollow, punch after fixing with pegging graft by 2 bearing pins 13 and sealing mat 14 from the combined type down-the-hole hammer 110 that revolves round the sun, improve deslagging efficient; (seeing Fig. 5, Fig. 6, Fig. 7)
Hammer into shape in the 110 rotary impact punching processes at the combined type down-the-hole that revolves round the sun certainly, the drill hammer 45 of several minor diameter impactors 4 when revolving round the sun thereupon, be subjected to the effect of formation resistance can also be around self axis rotation, the distance and the peripheral velocity of the hard alloy head 44 relative revolution center on the drill hammer 45 all change at random, make the acting and the wearing and tearing of each hard alloy head 44 be tending towards balanced, increase work efficiency and application life.(seeing Fig. 4, Fig. 5, Fig. 6)
In conjunction with the foregoing description, the utility model is illustrated, but by the structure of the quantity of the impactor of the minor diameter of the combined type down-the-hole hammer of revolving round the sun certainly and compound mode, stake body is done some changes, the details of construction sequence is done some suitable adjustment, just can in scope of the present utility model, derive the combined type down-the-hole hammer and the corresponding construction method thereof of various different types.
Claims (7)
1. the combined type down-the-hole that revolves round the sun is certainly hammered into shape, comprise hookup (1), stake body (3), divide device of air (2) and be installed in the impactor (4) of several minor diameters on the stake body (3), it is characterized in that: the front end of the impactor body (42) of described impactor (4) is provided with cylindrical fairlead (47), the neck of drill hammer (45) is the cylindrical axis of guide (49), the cylindrical axis of guide (49) of described drill hammer (45) inserts in the cylindrical fairlead (47) of described impactor body (42) front end and by the spacing ring of splitting (48) location, and described drill hammer (45) be can be axially rotatably and coaxially installed on the described impactor body (42).
2. according to claim 1 from the combined type down-the-hole hammer that revolves round the sun, it is characterized in that: the joint of described impactor (4) is the cylinder joint (41) of band positioning ring groove (42) and seal groove (43), several described impactors (4) insert the upper plate (35) of stake body (3) and the locating hole of base plate (34) respectively, are connected the location by the locating ring of splitting (61), stop collar (62), back-up ring (63), jump ring (64) with stake body (3); The end of described cylinder joint (41) insert described minute device of air (2) transition pore (23) in, the sealing ring (65) of packing in the described seal groove (43) sealing.
3. according to claim 1 and 2 from the combined type down-the-hole hammer that revolves round the sun, it is characterized in that: divide device of air (2) one ends to be connected with described hookup (1), the other end is connected with described stake body (3), described minute device of air (2) be provided with the collection chamber (21) that is communicated with feeder, described collection chamber (21) is communicated with described impactor (4) respectively by branch gas circuit (22) suitable with the quantity of described impactor (4) and the transition pore (23) that is located at described minute gas circuit (22) exit, described minute gas circuit (22) be deep camber pipeline structure and from the straight-through described impactor (4) of upper top.
4. according to claim 3 from revolving round the sun combined type down-the-hole hammer, it is characterized in that: the damping adjustable ring (26) that also is provided with as required respectively the different size that the air feed parameter to each described impactor (4) controls to adjust in the transition pore (23) in described minute gas circuit (22) exit.
5. according to claim 1 and 2 it is characterized in that: described hookup (1) is the cylindricality fittings body from the combined type down-the-hole hammer that revolves round the sun, and the cylindricality joint of described cylindricality fittings body and drilling rod is pegged graft and fixed by at least one bearing pin and sealing mat.
6. according to claim 5 it is characterized in that: described cylindricality fittings body is hexahedron column construction (11) from the combined type down-the-hole hammer that revolves round the sun, and pegs graft fixing by 2 bearing pins (13) and sealing mat (14) with interior six square joints of drilling rod.
7. according to claim 1 and 2 it is characterized in that: described several impactors (4) are separately positioned on middle part and the peripheral part at stake body (3) from the combined type down-the-hole hammer that revolves round the sun, or depart from the center and install.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020550985 CN201786252U (en) | 2010-09-30 | 2010-09-30 | Rotation-revolution combined down-hole hammer |
| PCT/CN2011/076226 WO2012041084A1 (en) | 2010-09-30 | 2011-06-23 | Combined down-the-hole hammer |
| JP2013530541A JP5948333B2 (en) | 2010-09-30 | 2011-06-23 | Combined down-the-hole hammer |
| KR1020137011112A KR101746822B1 (en) | 2010-09-30 | 2011-06-23 | Combined down-the-hole hammer |
| EP11827980.1A EP2623705B1 (en) | 2010-09-30 | 2011-06-23 | Combined down-the-hole hammer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020550985 CN201786252U (en) | 2010-09-30 | 2010-09-30 | Rotation-revolution combined down-hole hammer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201786252U true CN201786252U (en) | 2011-04-06 |
Family
ID=43818219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020550985 Expired - Lifetime CN201786252U (en) | 2010-09-30 | 2010-09-30 | Rotation-revolution combined down-hole hammer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201786252U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101967955A (en) * | 2010-09-30 | 2011-02-09 | 湖南山河智能机械股份有限公司 | Rotation-revolution combined down-hole hammer and construction method thereof |
| CN103806838A (en) * | 2014-03-03 | 2014-05-21 | 陶德明 | Lithosphere piling drill |
| CN104499935A (en) * | 2014-12-08 | 2015-04-08 | 中煤科工集团西安研究院有限公司 | Reverse circulation cluster typedownhole hammer for reaming |
| CN106194006A (en) * | 2016-09-09 | 2016-12-07 | 北京中车重工机械有限公司 | A kind of cluster type down-hole hammer |
| CN106223840A (en) * | 2016-09-09 | 2016-12-14 | 北京中车重工机械有限公司 | Cluster type down-hole hammer and down-hole hammer monomer locked mechanism thereof |
| CN106285459A (en) * | 2016-10-28 | 2017-01-04 | 北京中车重工机械有限公司 | The top connection of down-hole hammer monomer and cluster type down-hole hammer |
| CN106437495A (en) * | 2016-10-28 | 2017-02-22 | 北京中车重工机械有限公司 | Lower connector for single downhole hammer and cluster downhole hammer |
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| CN110439458A (en) * | 2019-08-16 | 2019-11-12 | 苏州科艺油气工程设备服务有限公司 | A kind of Novel rotary pneumatic hammer rock steering drilling tool |
| CN111075348A (en) * | 2019-12-26 | 2020-04-28 | 长沙黑金刚实业有限公司 | Combined rotary impactor |
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2010
- 2010-09-30 CN CN 201020550985 patent/CN201786252U/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101967955B (en) * | 2010-09-30 | 2013-05-08 | 山河智能装备股份有限公司 | Rotation-revolution combined down-hole hammer and construction method thereof |
| CN101967955A (en) * | 2010-09-30 | 2011-02-09 | 湖南山河智能机械股份有限公司 | Rotation-revolution combined down-hole hammer and construction method thereof |
| CN103806838B (en) * | 2014-03-03 | 2016-03-09 | 陶德明 | Lithosphere piling drill bit |
| CN103806838A (en) * | 2014-03-03 | 2014-05-21 | 陶德明 | Lithosphere piling drill |
| CN104499935B (en) * | 2014-12-08 | 2018-08-10 | 中煤科工集团西安研究院有限公司 | Reaming reacting cycle cluster type down-hole hammer |
| CN104499935A (en) * | 2014-12-08 | 2015-04-08 | 中煤科工集团西安研究院有限公司 | Reverse circulation cluster typedownhole hammer for reaming |
| CN106194006A (en) * | 2016-09-09 | 2016-12-07 | 北京中车重工机械有限公司 | A kind of cluster type down-hole hammer |
| CN106223840A (en) * | 2016-09-09 | 2016-12-14 | 北京中车重工机械有限公司 | Cluster type down-hole hammer and down-hole hammer monomer locked mechanism thereof |
| CN106285459A (en) * | 2016-10-28 | 2017-01-04 | 北京中车重工机械有限公司 | The top connection of down-hole hammer monomer and cluster type down-hole hammer |
| CN106437495A (en) * | 2016-10-28 | 2017-02-22 | 北京中车重工机械有限公司 | Lower connector for single downhole hammer and cluster downhole hammer |
| CN108500001A (en) * | 2018-03-19 | 2018-09-07 | 福建工程学院 | A kind of cement bunker library clearing machine spiral cutter head |
| CN108500001B (en) * | 2018-03-19 | 2020-12-01 | 福建工程学院 | Spiral tool bit of cement silo cleaning machine |
| CN110439458A (en) * | 2019-08-16 | 2019-11-12 | 苏州科艺油气工程设备服务有限公司 | A kind of Novel rotary pneumatic hammer rock steering drilling tool |
| CN111075348A (en) * | 2019-12-26 | 2020-04-28 | 长沙黑金刚实业有限公司 | Combined rotary impactor |
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