CN105003199A - Large-diameter pile hole operation construction method and special clustered DTH hammer - Google Patents
Large-diameter pile hole operation construction method and special clustered DTH hammer Download PDFInfo
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- CN105003199A CN105003199A CN201510281080.7A CN201510281080A CN105003199A CN 105003199 A CN105003199 A CN 105003199A CN 201510281080 A CN201510281080 A CN 201510281080A CN 105003199 A CN105003199 A CN 105003199A
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Abstract
The invention discloses an efficient pollution-free large-diameter pile hole operation construction method, which comprises the following steps of: in a hole forming position, firstly using a vibration hammer to press a wall protection pipe into a covering layer till reaching the rock position, and dismounting the vibration hammer; putting a rotary drilling rig in a proper position, using a conventional rotary drilling drill bit for digging out the loose and soft covering layer out of the wall protection pipe, and cleaning the remaining covering layer in a hole till reaching the rock position; replacing a special clustered DTH (Down-The-Hole) hammer of the rotary drilling rig, and performing entering-rock operation until a pile hole meets the pile hole dimension requirement; taking out the special clustered DTH hammer, and performing subsequent pile hole work such as steel bar cage feeding and grouting; and using the vibration hammer or a pipe extractor to take out the wall protection pipe to complete the pile hole construction. The special clustered DTH hammer comprises a tubular hammer body, wherein a plurality of sub hammers capable of being driven by gas are arranged inside the tubular hammer body; a drill bit is arranged at the bottom of each sub hammer; and the plurality of sub hammers surround the center of the tubular hammer and are distributed according to different circumferences. The method has the advantages that the operation time is greatly shortened; and the operation efficiency is much higher than that of a conventional construction method.
Description
Technical field
the present invention relates to a kind of stake holes operation engineering method, relate to a kind of Large Diameter Pile Holes operation engineering method of efficient pollution-free and special cluster type down-hole hammer specifically, belong to drillman's law technology field.
Background technology
Current in the construction of large aperture stake holes (more than 600mm), most employing long-spiral drilling machine, rotary drilling rig, hand Churn drill etc., limit by operating type, long-spiral drilling machine and rotary drilling rig soft covering layer and comparatively on incompetent bed efficiency higher, but at hard rock, on the granite that particularly intensity is higher, efficiency is poor, domestic hard rock operation uses the mode of hand Churn drill to carry out operation mostly, operating efficiency is low, the general pore-forming time needs a couple of days to tens day, and to meet covering layer softer, during the harder operating mode in rock stratum, three kinds of equal inefficiencies of operation, and need mud off be used, environment pollution is serious! and in river course or the serious operating mode of other liquids, above operating type is all undesirable.
Summary of the invention
The problem to be solved in the present invention is the drawback for work at present, a kind of Large Diameter Pile Holes operation engineering method of efficient pollution-free is provided, utilize churning driven, for differently plasmogamy distinct device, effectively improve speed of fulfiling hole, and by carrying out retaining wall with pipe, and do not need to use mud off, mud contamination is not existed to environment.
In order to solve the problem, the present invention by the following technical solutions:
A Large Diameter Pile Holes operation engineering method for efficient pollution-free, comprises the following steps:
A, one-tenth hole site first use vibrating hammer that wall protection pipe is pressed into covering layer, until rock position, shed vibrating hammer;
B, rotary drilling rig enter position, utilize conventional churning driven head, are dug out by covering layer soft in wall protection pipe, cleaning eye inner covering layer, until rock position;
C, rotary drilling rig change special cluster type down-hole hammer, carry out into rock operation, until stake holes meets stake holes dimensional requirement;
D, take out special cluster type down-hole hammer, carry out the follow-up stake holes work such as descending reinforcing cage, slip casting;
E, utilize vibrating hammer or pipe extractor to take out wall protection pipe, complete stake holes.
The present invention adopts such scheme, makes full use of vibrating hammer, churning driven, cluster type down-hole hammer operating feature, plays each equipment strong point, substantially reduce the activity duration, operating efficiency unconventional engineering method far away; This engineering method eliminates mud off link, adopts the mode of wall protection pipe, avoids the pollution of mud to environment; This engineering method is specially adapted to the stake holes operating mode of covering layer is softer, rock stratum is harder operating mode and operation in river, ocean.
The present invention also provides a kind of special cluster type down-hole hammer for above-mentioned engineering method, comprise a cartridge type hammer body, the inside of described cartridge type hammer body is provided with the son hammer of several available gas driving, the bottom of son hammer is provided with drill bit, described some height are hammered into shape around cartridge type hammer body center, according to different circle distribution.
Cartridge type hammer body rotates a circle, and the rock area that the son hammer of different circumference covers superposes mutually, and can meet down-hole hammer and rotate a circle, rock layer surface all can obtain fragmentation.
Further optimization: near the position on top, cartridge type hammer body is connected to the mounting cylinder on the equipment such as rotary drilling rig, long-spiral drilling machine, excavator in described cartridge type hammer body, in described mounting cylinder, there is upper plenum, there is transit joint the upper end of mounting cylinder by Flange joint, is used on the equipment such as rotary drilling rig, long-spiral drilling machine, excavator by transit joint.
Further optimization: the bottom of described mounting cylinder is communicated with intermediate cavity, the excircle of intermediate cavity is connected with the inner wall sealing of cartridge type hammer body.Have lower chambers respectively in each height hammer, the upper end of each lower chambers is communicated with the shell wall of intermediate cavity; The upper end of some height hammers is fixedly connected with by locking device respectively and between the shell wall of intermediate cavity, and this locking device is similar dismountable devices such as fastening bolt.
The upper end of son hammer is inserted in intermediate cavity, and binding site all adopts sealing device, prevents high pressure gas leakage, causes waste.
In use procedure, as son hammer need be changed, only need locking device being hammered into shape top to remove, son can be hammered into shape taking-up and carry out changing or safeguarding.
Further optimization: the excircle of described cartridge type hammer body is provided with along axis the air flue that some roads cave inward; The position be positioned in described cartridge type hammer body above intermediate cavity is storage slag chute.
Further optimization: the bottom of described cartridge type hammer body is provided with some pieces of wear plates between each drill bit, and described wear plate is connected with down-hole hammer base plate by bolt.Wear plate effectively can reduce the wearing and tearing of base plate, is convenient to change simultaneously, increases down-hole hammer application life.
Further optimization: be provided with the gas passage be communicated with air flue respectively between adjacent wear plate, can be convenient to the cleaning of rock slag.
Further optimization: the lower end excircle of described cartridge type hammer body is evenly provided with some fast wearing plates along axis, can effectively protect hammer body periphery, reduces peripheral wearing and tearing.
During work, gases at high pressure enter closed upper chamber by air inlet pipe, enter the lower chambers in each son hammer afterwards by intermediate cavity, and each son hammer utilizes gases at high pressure to carry out acting fractured rock; Gas after having done work discharges cartridge type hammer body outside by the centre bore of the drill bit of son hammer lower end, and the rock slag of fragmentation is carried in storage slag chute by the air flue of cartridge type hammer body surrounding by the gas of discharge.
The present invention can directly be used in rotary drilling rig common on stake holes market, long-spiral drilling machine and transformed excavator etc., and assembling process is simple, drilling tool easy switching; The hard rock activity duration is short, and efficiency is high, compares routine work time lifting decades of times; At the bottom of working service cost, during normal operation, only need to change son hammer and tup, and convenient disassembly; Each cavity seal is reliable, effectively reduces the waste of gases at high pressure; Be provided with special slagging channel in the surrounding of cartridge type hammer body, be convenient to the discharge of rock slag; Be provided with wear plate in the bottom of cartridge type hammer body, periphery is provided with wearing plate, effectively reduce the wearing and tearing of hammer body, improve application life; During operation, son hammer is at the bottom of hole, and noise is little on the ground, reduces noise pollution.
Further optimization: drill bit comprises bit body, the end face of bit body is provided with the facet of a ring-type, and described faceted inner side arranges its depth of section lower than concave plane in faceted depth of section, and interior concave plane is evenly provided with several center tooth.
Below the further optimization of the present invention to such scheme: the number of center tooth is even number, is symmetrical arranged between two.
Further optimization: the center described bit body being positioned at indent plane is provided with the pore being communicated with the inner air flue of bit body along its axis; Effectively can get rid of the waste gas of son hammer, improve the carrying capacity of waste gas to rock slag simultaneously, the drilling work requirement of coupling cluster type down-hole hammer, effectively ensure that operating efficiency.
Further optimization: the position end face of described bit body being positioned at facet periphery is provided with the inclined-plane of ring-type, and inclined-plane is evenly provided with several heel teeths.The number of heel teeth is even number, is symmetrical arranged between two.Heel teeth and center tooth all adopt alloy to make, and heel teeth and center tooth symmetric design respectively, is convenient to stressed.
Further optimization: the depth of section of heel teeth and the depth of section of center tooth in the same plane.Effectively improve the uniformity of drill bit to catalase, wearing and tearing evenly.
Further optimization: described facet is evenly provided with several sludge grooves, described sludge groove is communicated with annular chamfer respectively with interior concave plane.Further optimization: and sludge groove and heel teeth and center tooth are interspersed, and are convenient to the uniform discharge of rock slag and waste gas.
Present invention eliminates the end face inclined hole of drill bit major part, change a straight hole passage into, adopt indent planar simultaneously, make drill bit alloy top sentence same plane, increase the support degree to down-hole hammer; Heel teeth and center tooth all adopt alloy to make, and heel teeth and center tooth be symmetric design respectively, is convenient to stressed, the depth of section of heel teeth and the depth of section of center tooth in the same plane.Effectively improve the uniformity of drill bit to catalase, wearing and tearing evenly.Eliminate original several end face grooves, change less sludge groove into, and sludge groove and heel teeth and center tooth are interspersed, and are convenient to the uniform discharge of rock slag and waste gas; Air vent is only had in the middle of cluster type down-hole hammer drill bit, and bit face symmetric design, effectively can get rid of the waste gas of son hammer, improve the carrying capacity of waste gas to rock slag simultaneously, the drilling work requirement of coupling cluster type down-hole hammer, effectively ensure that operating efficiency.
The present invention utilizes the conventional drilling tool of rotary drilling rig high in covering layer efficiency, the inefficient feature of middle hard rock, and cluster type down-the-hole hammers the high feature of rock efficiency, both are combined, rotary drill tools only carries out covering layer operation, and cluster type down-hole hammer carries out into rock operation, and both all adopt standard square toes to switch with churning driven head, easy switching, efficiency is high.Utilize wall protection pipe to carry out retaining wall to covering layer simultaneously.
Below in conjunction with drawings and Examples, further statement is done to the present invention.
Accompanying drawing explanation
Accompanying drawing 1 is the view of the first engineering method step in the embodiment of the present invention;
Accompanying drawing 2 is the view of the second engineering method step in the embodiment of the present invention;
Accompanying drawing 3 is the view of the 3rd engineering method step in the embodiment of the present invention;
Accompanying drawing 4 is the view of the 4th engineering method step in the embodiment of the present invention;
Accompanying drawing 5 is the view of the 5th engineering method step in the embodiment of the present invention;
Accompanying drawing 6 is the structural representation of cluster type down-hole hammer in the embodiment of the present invention;
Accompanying drawing 7 is the upward view of accompanying drawing 6;
Accompanying drawing 8 is the structural representation of cluster type down-hole hammer drill bit in the embodiment of the present invention;
Accompanying drawing 9 is the lateral view of accompanying drawing 8.
In figure: 1-vibrating hammer; 2-wall protection pipe; 3-covering layer; 4-rock; 5-rotary drilling rig; The conventional churning driven head of 6-; 7-cluster type down-hole hammer; 8-reinforcing cage; 1A-cartridge type hammer body; 2A-upper chamber; 3A-hammers into shape; 4A-joint air inlet; 5A-drill bit; 6A-air flue; 7A-stores up slag chute; 8A-locking device; 9-wear plate; 10-gas passage; 11-wearing plate; 12-flange; 13-transit joint; 14-air inlet pipe; 15-connecting cylinder; 16-intermediate cavity; 17-lower chambers;
1B-bit body; 2B-facet; 3B-annular chamfer; 4B-heel teeth; Concave plane in 5B-; 6B-center tooth; 7B-pore; 8B-screw thread; 9B-sludge groove.
Detailed description of the invention
embodiment, a kind of Large Diameter Pile Holes operation engineering method of efficient pollution-free, comprises the following steps:
A, as shown in Figure 1, first uses vibrating hammer 1 that wall protection pipe 2 is pressed into covering layer 3 in one-tenth hole site, until rock 4 position, sheds vibrating hammer 1;
B, as shown in Figure 2, rotary drilling rig 5 enters position, utilizes conventional churning driven head 6, is dug out by covering layer soft in wall protection pipe 2, cleaning eye inner covering layer, until rock position 4;
C, as shown in Figure 3, rotary drilling rig changes special cluster type down-hole hammer, carries out into rock operation, until stake holes meets stake holes dimensional requirement;
D, as shown in Figure 4, take out special cluster type down-hole hammer, carry out the follow-up stake holes work such as descending reinforcing cage 8, slip casting;
E, last as shown in Figure 5, utilize vibrating hammer 1 or pipe extractor to take out wall protection pipe 2, complete stake holes.
Empirical tests, according to above-mentioned engineering method: on the granite that formation hardness is higher, actual enter the rock activity duration, the operating efficiency that conventional impact is bored is 30 hours/meter, and after using this engineering method, operating efficiency is 0.5 hour/meter, substantially reduces the activity duration.
The present invention adopts such scheme, makes full use of vibrating hammer, churning driven, cluster type down-hole hammer operating feature, plays each equipment strong point, substantially reduce the activity duration, operating efficiency unconventional engineering method far away; Eliminate mud off link, adopt the mode of wall protection pipe, avoid the pollution of mud to environment; Be specially adapted to the stake holes operating mode of covering layer is softer, rock stratum is harder operating mode and operation in river, ocean.
The present invention also provides a kind of special cluster type down-hole hammer for above-mentioned engineering method, as shown in Figure 6, this cluster type down-hole hammer comprises a cartridge type hammer body 1A, the inside of described cartridge type hammer body 1A is provided with some height hammer 3A, the bottom of son hammer 3A is provided with drill bit 5A, described some height hammer 3A into shape around cartridge type hammer body 1A center, according to different circle distribution.
Cartridge type hammer body 1A rotates a circle, and the rock area that the son hammer 3 of different circumference covers superposes mutually, and can meet down-hole hammer and rotate a circle, rock layer surface all can obtain fragmentation.
Near the position on top, cartridge type hammer body 1A is connected to the mounting cylinder 15 on the equipment such as rotary drilling rig, long-spiral drilling machine, excavator in described cartridge type hammer body 1A, in described mounting cylinder 15, there is upper plenum 2A, the upper end of mounting cylinder 15 is connected with transit joint 13 by flange 12, is used on the equipment such as rotary drilling rig, long-spiral drilling machine, excavator by transit joint 13.
The bottom of described mounting cylinder 15 is communicated with intermediate cavity 16, and the excircle of intermediate cavity 16 is connected with the inner wall sealing of cartridge type hammer body 1.
Have lower chambers 17 respectively in each height hammer 3A, the upper end of each lower chambers 17 is communicated with the shell wall of intermediate cavity 16;
The upper end of some height hammer 3A is fixedly connected with by locking device 8A respectively and between the shell wall of intermediate cavity 16, and this locking device 8A is similar dismountable devices such as fastening bolt.
The upper end of son hammer 3A is inserted in intermediate cavity 16, and binding site all adopts sealing device, prevents high pressure gas leakage, causes waste.
In use procedure, as son hammer 3A need be changed, only need locking device 8A being hammered into shape 3A top to remove, son can be hammered into shape 3A taking-up and carry out changing or safeguarding.
Described mounting cylinder 15 is communicated with air inlet pipe 14, and described drill bit 5A is provided with the centre bore hammered the lower chambers 17 in 3A with son into shape and be communicated with.
The excircle of described cartridge type hammer body 1A is provided with along axis the air flue 6A that some roads cave inward; The position be positioned in described cartridge type hammer body 1A above intermediate cavity 16 is storage slag chute 7A, storage slag chute 7A is positioned by the bossing of several locking devices 8 of border above intermediate cavity 16, guarantee that air flue 6A is corresponding with storage slag chute air flue, exhaust gas utilization residual pressure is carried rock slag and is entered storage slag chute 7A along air flue 6A.
The bottom of described cartridge type hammer body 1A is provided with some pieces of wear plates 9 between each drill bit 5A, and described wear plate is connected with down-hole hammer base plate by bolt.Wear plate 9 effectively can reduce the wearing and tearing of base plate, is convenient to change simultaneously, increases down-hole hammer application life.
Be provided with the gas passage 10 be communicated with air flue 6A respectively between adjacent wear plate 9, the cleaning of rock slag can be convenient to.
The lower end excircle of described cartridge type hammer body 1A is evenly provided with along axis the abrasion-proof rib that some fast wearing plates 11 or wear resistance electrode be linked to be, can effectively protects hammer body periphery, reduce peripheral wearing and tearing.
During work, gases at high pressure enter closed upper chamber 2A by air inlet pipe 14, and enter the lower chambers 17 in each son hammer 3A by intermediate cavity 16 afterwards, each son hammer 3 utilizes gases at high pressure to carry out acting fractured rock; Gas after having done work discharges cartridge type hammer body 1A outside by the centre bore of the drill bit 5A of son hammer 3A lower end, and the rock slag of fragmentation is carried in storage slag chute 7A by the air flue 6A of cartridge type hammer body 1A surrounding by the gas of discharge.
As shown in Figure 8, Figure 9, drill bit 5A comprises bit body 1B, the end face of bit body 1B is provided with the facet 2B of a ring-type, the inner side of described facet 2B arranges its depth of section lower than concave plane 5B in the depth of section of facet 2B, and interior concave plane 5B is evenly provided with several center tooth 6B.
The number of center tooth 6B is even number, and corresponding two are arranged symmetrically.
The center described bit body 1B being positioned at indent plane 5B is provided with the pore 7B being communicated with the inner air flue of bit body along its axis; Effectively can get rid of the waste gas of son hammer, improve the carrying capacity of waste gas to rock slag simultaneously, the drilling work requirement of coupling cluster type down-hole hammer, effectively ensure that operating efficiency.
Be provided with one section of screw thread 8B in pore 7B, screw thread 8B is mainly used in the Quick change beater head instrument coordinating down-hole hammer, and the rapid free realizing son hammer tup tears replacing open.
The end of described pore 7B and the link position of interior concave plane 5B are tapered setting, the uniform divided flows of the waste gas of the rock slag that is easy to carry.
The position end face of described bit body 1B being positioned at facet 2B periphery is provided with the inclined-plane 3B of ring-type, and inclined-plane 3B is evenly provided with several heel teeths 4B.The number of heel teeth 4B is even number, and corresponding two are arranged symmetrically.
Heel teeth 4B and center tooth 6B all adopts alloy to make, and heel teeth 4B and center tooth 6B be symmetric design respectively, is convenient to stressed, the depth of section of heel teeth 4B and the depth of section of center tooth 6B in the same plane.Effectively improve the uniformity of drill bit to catalase, wearing and tearing evenly.
Described facet is evenly provided with several sludge grooves 9B, described sludge groove 9B is communicated with annular chamfer 3B respectively with interior concave plane 4B.And sludge groove 9B and heel teeth 4B and center tooth 6B is interspersed, and is convenient to the uniform discharge of rock slag and waste gas.
Change two large end face grooves of guiding into equally distributed multiple little sludge groove 9B, make the dispersion of air-flow more reasonable, be more conducive to the cleaning of the single son hammer tup periphery rock slag of cluster type down-hole hammer.
The present invention uses for reference the advantage of down-the-hole drilling tool in hard rock operation, utilize other equipment such as rotary drilling rig or long-spiral drilling machine simultaneously, several monomer hammer is carried out binding operation, by the inlet channel designed separately, for the son hammer of cluster type down-hole hammer carries out air feed, son hammer in down-hole hammer is made to carry out operation respectively, utilize rotary drilling rig to drive cluster type down-hole hammer to rotate simultaneously, complete the fragmentation in face, whole rock stratum, the usual activity duration is only several hours, substantially reduce the activity duration in heavy caliber hole, be particularly suitable for rescue hole, the hard rock working conditions such as urgent operation hole.
The present invention utilizes the conventional drilling tool of rotary drilling rig high in covering layer efficiency, the inefficient feature of middle hard rock, and cluster type down-the-hole hammers the high feature of rock efficiency, both are combined, rotary drill tools only carries out covering layer operation, and cluster type down-hole hammer carries out into rock operation, and both all adopt standard square toes to switch with churning driven head, easy switching, efficiency is high.Utilize wall protection pipe to carry out retaining wall to covering layer simultaneously.
Claims (16)
1. a Large Diameter Pile Holes operation engineering method for efficient pollution-free, comprises the following steps:
A, one-tenth hole site first use vibrating hammer (1) by wall protection pipe (2) press-in covering layer (3), until rock (4) position, shed vibrating hammer (1);
B, rotary drilling rig (5) enter position, utilize conventional churning driven head (6), and dug out by soft covering layer in wall protection pipe (2), cleaning eye inner covering layer, until rock position (4);
C, rotary drilling rig change special cluster type down-hole hammer, carry out into rock operation, until stake holes meets stake holes dimensional requirement;
D, take out special cluster type down-hole hammer, carry out the follow-up stake holes work such as descending reinforcing cage (8), slip casting;
E, utilize vibrating hammer (1) or pipe extractor to take out wall protection pipe (2), complete stake holes.
2. the special cluster type down-hole hammer for engineering method according to claim 1, it is characterized in that: this cluster type down-hole hammer comprises a cartridge type hammer body (1A), the inside of described cartridge type hammer body (1A) is provided with some height hammer (3A), the bottom of son hammer (3A) is provided with drill bit (5A), described some height hammer (3A) into shape around cartridge type hammer body (1A) center, according to different circle distribution.
3. special cluster type down-hole hammer according to claim 2, is characterized in that:
Near the position on top, cartridge type hammer body (1A) is connected to the mounting cylinder (15) on the equipment such as rotary drilling rig, long-spiral drilling machine, excavator in described cartridge type hammer body (1A), there is in described mounting cylinder (15) upper plenum (2A), the bottom of described mounting cylinder (15) is communicated with intermediate cavity (16), and the excircle of intermediate cavity (16) is connected with the inner wall sealing of cartridge type hammer body (1); .
4. special cluster type down-hole hammer according to claim 3, is characterized in that:
Have lower chambers (17) respectively in each height hammer (3A), the upper end of each lower chambers (17) is communicated with the shell wall of intermediate cavity (16), and the upper end of son hammer (3A) is inserted in intermediate cavity (16), and binding site all adopts sealing device.
5. special cluster type down-hole hammer according to claim 4, is characterized in that:
Described mounting cylinder (15) is communicated with air inlet pipe (14), described drill bit (5A) is provided with the centre bore hammered the lower chambers (17) in (3A) with son into shape and be communicated with.
6. special cluster type down-hole hammer according to claim 5, is characterized in that:
The excircle of described cartridge type hammer body (1A) is provided with along axis the air flue (6A) that some roads cave inward; The position of intermediate cavity (16) top is positioned at for storage slag chute (7A) in described cartridge type hammer body (1A), storage slag chute (7A) is positioned by the bossing of several locking devices (8) of border, intermediate cavity (16) top, guarantee that air flue (6A) is corresponding with storage slag chute air flue, exhaust gas utilization residual pressure is carried rock slag and is entered storage slag chute (7A) along air flue (6A).
7. special cluster type down-hole hammer according to claim 6, is characterized in that:
The bottom of described cartridge type hammer body (1A) is positioned between each drill bit (5A) and is provided with some pieces of wear plates (9), and described wear plate is connected with down-hole hammer base plate by bolt.
8. special cluster type down-hole hammer according to claim 7, is characterized in that:
Be provided with the gas passage (10) be communicated with air flue (6A) respectively between adjacent wear plate (9), the cleaning of rock slag can be convenient to.
9. special cluster type down-hole hammer according to claim 8, is characterized in that:
The lower end excircle of described cartridge type hammer body (1A) is evenly provided with some fast wearing plates (11) along axis, can effectively protects hammer body periphery, reduce peripheral wearing and tearing.
10., according to the arbitrary described special cluster type down-hole hammer of claim 2-9, it is characterized in that:
Drill bit (5A) comprises bit body (1B), the end face of bit body (1B) is provided with the facet (2B) of a ring-type, the inner side of described facet (2B) arranges the interior concave plane (5B) of its depth of section lower than the depth of section of facet (2B), interior concave plane (5B) is evenly provided with several center tooth (6B).
11. special cluster type down-hole hammers according to claim 10, is characterized in that:
The number of center tooth (6B) is even number, and corresponding two are arranged symmetrically.
12. special cluster type down-hole hammers according to claim 11, is characterized in that:
The center described bit body (1B) being positioned at indent plane (5B) is provided with the pore (7B) being communicated with the inner air flue of bit body along its axis.
13. special cluster type down-hole hammers according to claim 12, is characterized in that:
The end of described pore (7B) and the link position of interior concave plane (5B) are tapered setting.
14. special cluster type down-hole hammers according to claim 13, is characterized in that:
The end face of described bit body (1B) is positioned at the inclined-plane (3B) that the peripheral position of facet (2B) is provided with ring-type, inclined-plane (3B) is evenly provided with several heel teeths (4B);
The number of heel teeth (4B) is even number, and corresponding two are arranged symmetrically.
15. special cluster type down-hole hammers according to claim 14, is characterized in that:
Heel teeth (4B) and center tooth (6B) all adopt alloy to make, and heel teeth (4B) and center tooth (6B) be symmetric design respectively, is convenient to stressed, the depth of section of heel teeth (4B) and the depth of section of center tooth (6B) in the same plane.
16. special cluster type down-hole hammers according to claim 15, is characterized in that:
Described facet is evenly provided with several sludge grooves (9B), described sludge groove (9B) is communicated with annular chamfer (3B) respectively with interior concave plane (4B), and sludge groove (9B) is interspersed with heel teeth (4B) and center tooth (6B).
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| CN110219596A (en) * | 2019-07-16 | 2019-09-10 | 张殿忠 | A kind of integrated cartridge type coring bit of down-hole hammer |
| CN110566114A (en) * | 2019-09-04 | 2019-12-13 | 深圳市工勘岩土集团有限公司 | Hard rock drilling pile-forming construction method of rotary excavating cluster type down-the-hole hammer |
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| CN113897957A (en) * | 2021-11-15 | 2022-01-07 | 上海广大基础工程有限公司 | Construction method of rock-entering cast-in-place pile |
| WO2022105343A1 (en) * | 2020-11-23 | 2022-05-27 | 长沙黑金刚实业有限公司 | Large-diameter combination impactor and down-the-hole drilling rig |
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| CN110566114A (en) * | 2019-09-04 | 2019-12-13 | 深圳市工勘岩土集团有限公司 | Hard rock drilling pile-forming construction method of rotary excavating cluster type down-the-hole hammer |
| CN110566114B (en) * | 2019-09-04 | 2021-12-24 | 深圳市工勘岩土集团有限公司 | Hard rock drilling pile-forming construction method of rotary excavating cluster type down-the-hole hammer |
| CN112196460A (en) * | 2020-09-08 | 2021-01-08 | 李新形 | Underground continuous wall down-the-hole hammer grooving machine and using method thereof |
| CN112196460B (en) * | 2020-09-08 | 2023-10-27 | 李新形 | Underground diaphragm wall down-the-hole hammer grooving machine and use method thereof |
| WO2022105343A1 (en) * | 2020-11-23 | 2022-05-27 | 长沙黑金刚实业有限公司 | Large-diameter combination impactor and down-the-hole drilling rig |
| CN113897957A (en) * | 2021-11-15 | 2022-01-07 | 上海广大基础工程有限公司 | Construction method of rock-entering cast-in-place pile |
| CN115217096A (en) * | 2022-07-03 | 2022-10-21 | 中建八局第二建设有限公司 | Miniature uplift pile cage framework device for slightly weathered rock geology and miniature uplift pile construction method |
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