CN215485845U

CN215485845U - Combined down-the-hole hammer

Info

Publication number: CN215485845U
Application number: CN202121793867.9U
Authority: CN
Inventors: 张领帅; 陈枝东; 王凤梅; 容雪芬; 苏星
Original assignee: Shenzhen Hongyeji Geotechnical Technology Co Ltd
Current assignee: Shenzhen Hongyeji Geotechnical Technology Co Ltd
Priority date: 2021-08-03
Filing date: 2021-08-03
Publication date: 2022-01-11
Anticipated expiration: 2031-08-03

Abstract

The utility model relates to the technical field of pile foundation construction equipment, and discloses a combined down-the-hole hammer, which comprises a drill rod and an installation disc fixedly installed on the bottom surface of the drill rod, wherein a small-caliber down-the-hole hammer is fixedly installed on the periphery of the bottom surface of the installation disc, a large-caliber down-the-hole hammer is fixedly installed on the middle bottom surface of the installation disc, wall scraping components are sleeved on the peripheries of the large-caliber down-the-hole hammer and the small-caliber down-the-hole hammer in a sliding mode, the large-caliber down-the-hole hammer and a plurality of small-diameter down-the-hole hammers on the periphery are connected together through the installation disc, a main air supply pipe in the middle of an upper drill rod is connected with a plurality of distributing air pipes at the top of the down-the-hole hammer, high-pressure air supplied to each small-caliber down-the-hole hammer drives a piston in the down-the-hole hammer to reciprocate, and impact the rock to impact and break.

Description

Combined down-the-hole hammer

Technical Field

The utility model relates to the technical field of pile foundation construction equipment, in particular to a combined down-the-hole hammer.

Background

In the existing pile foundation engineering, the method of forming holes by using a slurry retaining wall and a rotary drilling rig is mostly adopted to construct engineering piles. The same is true for the construction of engineering piles needing rock embedding at the lower part of a pile body, if the upper part of the constructed cast-in-situ bored pile is a soil layer and the lower part is hard rock, slurry is generally mixed for wall protection during drilling, and then a rotary drilling rig is adopted to install a gear barrel drill to grind, drill and core in the rock to form holes.

The rock strength is generally high, such as common granite, unconfined compressive strength is generally between 80 MPa and 150MPa, and the hard rock is ground and cored by adopting a hard alloy roller bit, so the drilling efficiency is extremely low, for example, a common rock-socketed cast-in-situ pile with the diameter of 1.8m is ground in the hard rock by adopting a rotary drilling rig to install the roller bit, the depth is 1m, the whole 2-3 days are spent, the diesel oil consumption is remarkable, and the construction cost is extremely high.

In view of the above problems, a combined down-the-hole hammer is proposed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a combined down-the-hole hammer, which works by adopting the device, thereby solving the problems that the drilling efficiency is extremely low because the strength of common rocks in the background is high, such as common granite, the unconfined compressive strength is generally between 80 and 150MPa, and the hard alloy roller bit is adopted to grind and core in the hard rocks, such as the rock-socketed cast-in-situ pile with the common diameter of 1.8m, the roller bit is arranged by adopting a rotary drilling rig to grind the depth of 1m in the hard rocks, the whole 2 to 3 days of time is required, the consumed diesel oil is astonishing, and the construction cost is extremely high.

In order to achieve the purpose, the utility model provides the following technical scheme: modular down-the-hole hammer, including drilling rod and fixed mounting the mounting disc on the drilling rod bottom surface, the bottom surface periphery fixed mounting of mounting disc has small-bore down-the-hole hammer, and fixed mounting has heavy-calibre down-the-hole hammer on the middle part bottom surface of mounting disc, and the periphery of heavy-calibre down-the-hole hammer and small-bore down-the-hole hammer slides and has cup jointed and scrape the wall subassembly, scrape the wall subassembly and include well lantern ring and fixed mounting the overcoat ring on the outer wall of well lantern ring, well lantern ring slides and cup joints on the outer wall of large-bore down-the-hole hammer, and the overcoat ring slides and cup joints on the outer wall of small-bore down-the-hole hammer.

Further, a main air supply pipe is arranged in the inner cavity of the drill rod.

Furthermore, a distributing air pipe is arranged in the inner cavity of the mounting disc and communicated with the main air supply pipe, and a slag discharge hole is also arranged in the inner cavity of the mounting disc.

Furthermore, a first hard alloy tooth is arranged on the bottom surface of the heavy caliber down-the-hole hammer.

Furthermore, a second hard alloy tooth is arranged on the bottom surface of the small-caliber down-the-hole hammer.

Furthermore, well lantern ring includes that well lantern ring main part scrapes the piece with fixed mounting on well lantern ring main part bottom surface, and scrapes the piece and be parallel four sides type setting, is provided with the drive gyro wheel in the inner chamber of well lantern ring main part both ends inner wall respectively.

Further, mounting grooves are respectively formed in the inner walls of the two ends of the middle lantern ring main body.

Further, well lantern ring is including driving the gyro wheel and including motor and fixed mounting the gyro wheel on motor output end, and motor fixed mounting is on the inner wall of mounting groove.

Furthermore, well lantern ring includes that the outer lantern ring includes the spliced pole and the outer lantern ring main part of fixed mounting in the spliced pole outer end, and the inner of spliced pole is fixed mounting on the outer wall of well lantern ring main part.

The utility model provides a combined down-the-hole hammer, wherein a large-diameter down-the-hole hammer and a plurality of small-diameter down-the-hole hammers at the periphery are connected together by a mounting disc, a main blast pipe at the middle part of an upper drill rod is connected with a plurality of distributing air pipes at the top part of the down-the-hole hammer, high-pressure air is conveyed to each small-diameter down-the-hole hammer by each distributing air pipe, the high-pressure air conveyed to each down-the-hole hammer drives a piston in the down-the-hole hammer to reciprocate to impact the down-the-hole hammer, the down-the-hole hammer repeatedly impacts rocks to impact and crush the rocks, the down-the-hole hammers with different calibers and small diameters are quickly impacted and perforated in hard rocks to form a plurality of smaller apertures with a larger aperture at the center and annularly distributed at the periphery, then a gas fracturing cylinder is arranged in the small apertures at the periphery, the rocks are crushed by a carbon dioxide gas fracturing process to finally achieve the aim of perforating, when an operator needs to clean the outer walls of the large-diameter down-the large-the small-the down-the small-the small-the down-the small-the bores hammers and the small-diameter down-hole hammers at the periphery, the motor can be started to drive the roller to rotate, so that the middle sleeve drives the outer sleeve to respectively slide up and down on the outer walls of the large-caliber down-the-hole hammer and the small-caliber down-the-hole hammer, and the soil adhered to the outer walls of the large-caliber down-the-hole hammer and the small-caliber down-the-hole hammer can be scraped.

Drawings

FIG. 1 is a schematic overall perspective view of the present invention;

FIG. 2 is a cross-sectional view of a drill pipe and mounting plate of the present invention;

FIG. 3 is a bottom view of the mounting plate of the present invention;

FIG. 4 is a schematic plan view of a deslagging aperture of the present invention;

FIG. 5 is a perspective view of the wall scraping assembly of the present invention;

fig. 6 is a cross-sectional view of a middle collar of the present invention.

In the figure: 1. a drill stem; 11. a main blast pipe; 2. mounting a disc; 21. distributing air pipes; 22. a slag discharge hole; 3. a heavy caliber down-the-hole hammer; 31. a first hard alloy tooth; 4. a small-bore down-the-hole hammer; 41. a second hard alloy tooth; 5. a wall scraping assembly; 51. a middle lantern ring; 511. a middle collar body; 5111. installing a groove; 512. scraping the block; 513. driving the roller; 5131. a motor; 5132. a roller; 52. an outer collar; 521. connecting columns; 522. an outer collar body.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 and 5, the combined down-the-hole hammer comprises a drill rod 1 and a mounting plate 2 fixedly mounted on the bottom surface of the drill rod 1, and is characterized in that a plurality of small-diameter down-the-hole hammers 4 are fixedly mounted on the periphery of the bottom surface of the mounting plate 2, the number of the small-diameter down-the-hole hammers 4 is determined by the aperture of the finally formed pile hole, 6 small-diameter down-the-hole hammers are arranged on the periphery of the pile hole with the diameter of 1.5-2 m, 8 small-diameter down-the-hole hammers are arranged on the periphery of the pile hole with the diameter of 2-2.5 m, 10 small-diameter down-the-hole hammers are arranged on the periphery of the pile hole with the diameter of 2.5-3.0 m, a large-diameter down-the-hole hammer 3 is fixedly mounted on the bottom surface of the middle part of the mounting plate 2, the center diameter of the large-diameter down-the large-the down-the-hole hammer 3 is 500 mm, and the outer peripheries of the small-diameter down-the large-the down-the hammer 4 are slidably sleeved with a wall scraping component 5, the middle sleeve ring 51 and an outer sleeve ring 52 fixedly mounted on the outer wall, the middle lantern ring 51 is sleeved on the outer wall of the large-caliber down-the-hole hammer 3 in a sliding mode, the outer lantern ring 52 is sleeved on the outer wall of the small-caliber down-the-hole hammer 4 in a sliding mode, the large-caliber down-the-hole hammer 3 and a plurality of small-caliber down-the-hole hammers 4 on the periphery are connected together through the mounting disc 2 in a sliding mode, the main air supply pipe 11 in the middle of the upper drill rod 1 is connected with a plurality of distributing air pipes 21 at the top of the down-the-hole hammer, high-pressure air is conveyed to the small-caliber down-the-hole hammers 4 through the distributing air pipes 21, the high-pressure air conveyed to the down-the-hole hammers drives pistons in the down-the-hole hammers to reciprocate, the down-the-hole hammers to impact the rock to achieve impact crushing, the hard hole is formed in the rock through the plurality of small-the plurality of different calibers 4, the plurality of small-the small-diameter hammers distributed annularly, then the gas fracturing cylinder is placed in the periphery, the rock is crushed through the carbon dioxide gas fracturing process, finally, the purpose of forming the hole is achieved, and compared with a traditional rock stratum hole forming mode of grinding a rotary excavating rock-socketed roller bit, the method is high in construction efficiency and low in construction cost.

Referring to fig. 1-4, in the combined down-the-hole hammer, a main air supply pipe 11 is arranged in an inner cavity of a drill rod 1, a distributing air pipe 21 is arranged in an inner cavity of a mounting disc 2, the distributing air pipe 21 is communicated with the main air supply pipe 11, a slag discharge hole 22 is also arranged in the inner cavity of the mounting disc 2, a plurality of first hard alloy teeth 31 are arranged on the bottom surface of a large-caliber down-the-hole hammer 3, and a plurality of second hard alloy teeth 41 are arranged on the bottom surface of a small-caliber down-the-hole hammer 4.

Referring to fig. 1, 5 and 6, in the combined down-the-hole hammer, the middle collar 51 includes a middle collar body 511 and scraping blocks 512 fixedly installed on the bottom surface of the middle collar body 511, and the scraping blocks 512 are arranged in a parallel four-sided shape, such that the middle collar 51 can overcome the space between the middle collar body 511 and the outer wall of the heavy caliber down-the-hole hammer 3 due to rollers 5132, thereby ensuring the scraping and cleaning of the outer wall of the heavy caliber down-the-hole hammer 3, driving rollers 513 are respectively arranged in the inner cavities of the inner walls of the two ends of the middle collar body 511, installation grooves 5111 are respectively arranged on the inner walls of the two ends of the middle collar body 511, the driving rollers 513 include a motor 5131 and rollers 5132 fixedly installed on the output end of the motor 5131, the motor 5131 is fixedly installed on the inner wall of the installation grooves 5111, the outer collar 52 includes a connection post 521 and an outer collar body 522 fixedly installed on the connection post 521, the inner end of the connection post 521 is fixedly installed on the outer wall of the middle collar body 511, after the down-the-hole hammer is finished, when an operator needs to clean the outer walls of the large-caliber down-the-hole hammer 3 and the small-caliber down-the-hole hammer 4, the motor 5131 can be started, the motor 5131 drives the roller 5132 to rotate, so that the middle lantern ring 51 drives the outer lantern ring 52 to respectively slide up and down on the outer walls of the large-caliber down-the-hole hammer 3 and the small-caliber down-the-hole hammer 4, the soil adhered to the outer walls of the large-caliber down-the-hole hammer 3 and the small-caliber down-the-hole hammer 4 can be scraped during working, the arrangement not only ensures that the soil cannot be adhered to the down-the-hole hammer, and the integral quality is prevented from being increased, but also the wall scraping is automatic in the whole process, manual operation is not needed, and manpower is saved.

Compared with the prior art, the utility model has the following beneficial effects:

1. the combined down-the-hole hammer provided by the utility model is characterized in that a large-diameter down-the-hole hammer 3 and a plurality of small-diameter down-the-hole hammers 4 on the periphery are connected together by virtue of a mounting disc 2, a main blast pipe 11 in the middle of an upper drill rod 1 is connected with a plurality of distributing air pipes 21 at the top of the down-the-hole hammer, high-pressure air is conveyed to each small-diameter down-the-hole hammer 4 by each distributing air pipe 21, the high-pressure air conveyed to each down-the-hole hammer drives a piston in the down-the-hole hammer to reciprocate to impact the down-the-hole hammer head, the down-the-hole hammer head repeatedly impacts rocks to impact and crush the rocks, the down-the rocks by utilizing the plurality of different-diameter small-diameter down-the-hole hammers 4 to rapidly impact and form a plurality of small apertures which are annularly distributed on the center and on the periphery, then a gas cracking cylinder is arranged in the small apertures on the periphery, the rocks are crushed by a carbon dioxide gas cracking process, and finally the aim of forming the holes is achieved, compared with a traditional rock stratum forming mode of grinding by a rotary-digging rock-socketed roller bit, the method has extremely high construction efficiency and low construction cost.

2. According to the combined down-the-hole hammer provided by the utility model, when an operator needs to clean the outer walls of the large-caliber down-the-hole hammer 3 and the small-caliber down-the-hole hammer 4, the motor 5131 can be started, so that the motor 5131 drives the roller 5132 to rotate, the middle lantern ring 51 drives the outer lantern ring 52 to respectively slide up and down on the outer walls of the large-caliber down-the-hole hammer 3 and the small-caliber down-the-hole hammer 4, and therefore, soil adhered to the outer walls of the large-caliber down-the-hole hammer 3 and the small-caliber down-the-hole hammer 4 can be scraped off in a working bonding mode.

3. According to the combined down-the-hole hammer provided by the utility model, the scraping block 512 is fixedly arranged on the bottom surface of the middle lantern ring main body 511, and the scraping block 512 is arranged in a parallel four-side shape, so that the middle lantern ring 51 can overcome the gap between the middle lantern ring main body 511 and the outer wall of the heavy-calibre down-the-hole hammer 3 due to the roller 5132, and the scraping and cleaning of the outer wall of the heavy-calibre down-the-hole hammer 3 are ensured.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Modular down-the-hole hammer includes drilling rod (1) and fixed mounting disc (2) on drilling rod (1) bottom surface, its characterized in that: the bottom surface periphery fixed mounting of mounting disc (2) has small-bore down-the-hole hammer (4), and fixed mounting has heavy-calibre down-the-hole hammer (3) on the middle part bottom surface of mounting disc (2), and the periphery of heavy-calibre down-the-hole hammer (3) and small-bore down-the-hole hammer (4) slides and has cup jointed and scrape wall subassembly (5), scrape wall subassembly (5) including well lantern ring (51) and fixed mounting in outer wall of lantern ring (51), well lantern ring (51) slide and cup joint on the outer wall of large-bore down-the-hole hammer (3), outer lantern ring (52) slide and cup joint on the outer wall of small-bore down-the-hole hammer (4).

2. The combination down-the-hole hammer of claim 1, wherein: a main air supply pipe (11) is arranged in the inner cavity of the drill rod (1).

3. The combination down-the-hole hammer of claim 1, wherein: a distributing air pipe (21) is arranged in the inner cavity of the mounting disc (2), the distributing air pipe (21) is communicated with the main air supply pipe (11), and a slag discharge hole (22) is further arranged in the inner cavity of the mounting disc (2).

4. The combination down-the-hole hammer of claim 1, wherein: the bottom surface of the heavy-calibre down-the-hole hammer (3) is provided with first hard alloy teeth (31).

5. The combination down-the-hole hammer of claim 1, wherein: and a second hard alloy tooth (41) is arranged on the bottom surface of the small-caliber down-the-hole hammer (4).

6. The combination down-the-hole hammer of claim 1, wherein: well lantern ring (51) including well lantern ring main part (511) and fixed mounting scrape piece (512) on well lantern ring main part (511) bottom surface, and scrape piece (512) and be the setting of parallel four sides type, be provided with drive gyro wheel (513) in the inner chamber of well lantern ring main part (511) both ends inner wall respectively.

7. The combination down-the-hole hammer of claim 6, wherein: and the inner walls of the two ends of the middle collar body (511) are respectively provided with a mounting groove (5111).

8. The combination down-the-hole hammer of claim 6, wherein: the middle lantern ring (51) comprises a driving roller (513) and a motor (5131) and a roller (5132) fixedly mounted at the output tail end of the motor (5131), and the motor (5131) is fixedly mounted on the inner wall of the mounting groove (5111).

9. The combination down-the-hole hammer of claim 1, wherein: the middle lantern ring (51) comprises an outer lantern ring (52) and an outer lantern ring main body (522) fixedly mounted at the outer end of the connecting column (521), and the inner end of the connecting column (521) is fixedly mounted on the outer wall of the middle lantern ring main body (511).