KR101651363B1 - Bit of a crushing sludge discharge pipe for air chute excavation - Google Patents

Bit of a crushing sludge discharge pipe for air chute excavation Download PDF

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Publication number
KR101651363B1
KR101651363B1 KR1020150072778A KR20150072778A KR101651363B1 KR 101651363 B1 KR101651363 B1 KR 101651363B1 KR 1020150072778 A KR1020150072778 A KR 1020150072778A KR 20150072778 A KR20150072778 A KR 20150072778A KR 101651363 B1 KR101651363 B1 KR 101651363B1
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South Korea
Prior art keywords
discharge pipe
air
sludge discharge
crushing roller
bit
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KR1020150072778A
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Korean (ko)
Inventor
김철응
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이경렬
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Priority to KR1020150072778A priority Critical patent/KR101651363B1/en
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    • 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
    • E21B10/00—Drill bits
    • E21B10/08—Roller bits
    • E21B10/18—Roller bits characterised by conduits or nozzles for drilling fluids
    • 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
    • E21B10/00—Drill bits
    • E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
    • F15D1/00—Influencing flow of fluids
    • F15D1/02—Influencing flow of fluids in pipes or conduits

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Engineering & Computer Science (AREA)
  • Earth Drilling (AREA)

Abstract

The present invention relates to an air input apparatus for a sludge discharge pipe of a bit drum for excavation, which is installed in the end of an excavator for excavating the ground to crush and excavate bedrock. A bit drum for excavation is configured as follows. A middle crushing roller, a center crushing roller, and an outer crushing roller are formed on the bottom surface of a disk for forming the bit drum. A suction hole connected with a sludge discharge pipe is formed in the space between the middle crushing roller and the center crushing roller. A ring-shaped shoe part is formed in the bottom of the disk. An air input hole, which supplies air for discharging sludge, is formed in the sludge discharge pipe. Therefore, the present invention effectively sucks internal sludge by allowing inputted air to create a swirl along the inner wall of the sludge discharge pipe.

Description

Technical Field [0001] The present invention relates to a sludge discharge pipe for air drilling,

The present invention relates to a sludge discharge pipe air injector for excavating a bit drum, which is installed at the end of an excavator for drilling a ground during tunnel construction or foundation work,

Generally, when excavating a rock mass, a bit formed by a drum formed by a plurality of crushing rollers provided with a carbide tip or a diamond in a circumferential direction is provided at the end of a hollow shaft which is connected to external power and rotates, When the hollow shaft of the rock excavator is rotated by external power, the crushing roller of the bit installed at the end of the hollow shaft is closely contacted with the rock to rotate, and the rock is crushed. At this time, And is sucked out to the outside through the inside of the hollow shaft together with water supplied to the outer peripheral side of the drum.

Examples of such rock excavation methods include a reverse circulation drill (RCD) method, a percussion rotary drill (PRD) method and a mud and air circulating hammer (MACH) method.

The RCD method is a method of excavating a special bit at the tip to the design depth. The excavated soil (including the excavated rock, hereinafter referred to as excavated soil) generated during excavation is circulated through a reverse drill rod To the ground.

The RCD method can be applied to the foundation of a building or the foundation of a bridge pier, which is a foundation pile supporting a ground structure because it is possible to perforate a large diameter of 1000mm to 3000mm.

However, since the RCD method relies only on the rotation of the bit, the excavation speed is very slow as compared with the air hammer method, the special bit and large equipment are used, and a separate air compressor is required for removing the excavated soil , The removal of the excavated soil is not smooth due to the slow speed of the circulating water.

Particularly, in order to perform efficient excavation with a large diameter, a sufficient load must be supplied to the bit in proportion to the excavation diameter. In this case, a considerable cost is required in manufacturing a drill collar for supplying a sufficient load. , Which leads to the problem of using large equipment.

The PRD method is a type of drilling using a type of air hammer that excavates the ground by rotating the hammer bit mounted on the pile driver by using compressed air and percussion by compressed air, It is a public law.

Since this PRD method has a single air hammer structure adopting a single bit, it is difficult to manufacture it with a large diameter. Therefore, it is used for excavation up to 600mm ~ 1000mm in diameter.

The prior art of excavation bit developed so far for such excavation will be described as follows.

The patent application No. 10-1998-0062272 (1998.12.30) relates to a rock excavation bit that is installed at the end of an excavator that pierces the ground during tunnel construction or building foundation work, A plurality of anti-wear tips made of special steel, such as a manganese alloy, having a high wear resistance such as a manganese alloy are provided on the outer periphery of the drum constituting the rock excavation bit so that the protrusion length can be adjusted. It is possible to perform the excavation work for a long time because there is no possibility of damaging the drum because only the prevention tip touches the rock wall surface and if the front surface of the wear prevention tip is worn out, It is possible to protrude the preventive tip so that it is possible to prevent the wear and tear The roller can be prevented from being damaged due to the damage of the drum due to the damage of the drum being minimized. And the gap between the bottom surface of the drum and the crushing roller is made as narrow as possible so that the crushing of the rock is prevented between the bottom surface of the drum and the crushing roller to prevent breakage of the crushing roller as much as possible, The lower end of the front side of the preventing tip is elongated so as to surround the outside crushing roller among the crushing rollers installed on the bottom surface of the drum so as to cover the front of the crushing roller during rotation of the drum to further prevent breakage of the crushing roller, So that the end of the crushing roller attached to the bottom surface of the drum and the drum Do as much as possible to prevent damage to life equipment Hebrews, as well as giving financial loss possible it would have to maximize drilling efficiency by allowing the long-term excavation. The patent application No. 10-1999-0004846 (1999.02.11) relates to a rock excavation bit for excavating a rock which is installed at the end of an excavator that pierces the ground when tunnel construction or foundation work is performed, The crushed rock fragments are not dispersed to the outside but are gathered more easily to thereby facilitate the discharge of the crushed rock fragments. In addition, the suction force of the discharge pipe formed in the drum is further increased, The present invention provides a high-quality and high-quality rock bit for maximizing the discharge efficiency. The object of the present invention is to provide a high-quality rock bit for maximizing the discharge efficiency, which comprises a pair of central crushing rollers, And the other outer crushing roller is installed at an angle to the outer crushing roller, and then the outer crushing roller And a suction hole communicating with the discharge pipe is formed in a space secured between the center crushing roller and the intermediate crushing roller on the side in which the pair of center crushing rollers are coupled in a straight line, , One of the two shafts is formed integrally with one bearing, and one of the central shredding rollers and one of the outer shredding rollers are axially coupled using a bolt to come in a straight line. In addition, since the inner circumferential surface of the outer circumferential lower side of the disk constituting the drum is formed to have a thick inner circumferential surface provided with a group of crushing rollers, the suction force for sucking the crushed crumb parts is increased, And a wing which is inclined in the same direction as the direction of rotation of the drum is formed on the outer circumferential lower side of the disk constituting the drum so that the wing is formed between the wing and the wing during rotation of the drum, And the suction force for sucking out the crushed rock fragments is increased by making it easily gathered to the inner side of the drum. In this case, the anti-wear tips Is fixed with fixing bolts, but the rear end is connected with adjusting bolts, and by adjusting the adjusting bolts, And an outward bulging portion with a gentle slope is formed on the lower side of the draft tube constituting the drum to form an air blow hole vertically upwardly penetrating from the lower side of the outward bulge portion to the inside thereof, So that the discharge efficiency of the rock fracture is increased by eliminating the phenomenon that the air pressure collides with the inner wall surface of the discharge pipe during the air injection. Patent Application No. 10-2005-0029367 (Apr. 4, 2005) discloses a method for excavating an excavated soil (including excavation piece) generated by excavation with an air hammer using compressed air used for operating an air hammer, The present invention relates to a drilling apparatus having a reverse-recirculating air hammer structure for discharging out of a drilling hole, and a drilling method for excavating a ground by a method for increasing the drilling hole diameter by stages using the same, However, in order to allow the excavated soil to flow into the hammer case together with the circulating water at the time of excavation and to effectively discharge these (excavated soil and circulating water) together with the compressed air used in the operation of the air hammer, It is possible to construct a drilling rig by constituting the drilling rig differently from a conventional air hammer drilling rig, Can be utilized as a drilling rig. The present invention relates to a multi-hammer for ground excavation improved in bit structure, a bit assembly for the same, and a fixed frame. The multi-hammer includes a hammer body, A plurality of striking members provided at predetermined intervals in the hammer body and pressed down by the air to selectively lower the striking members and a plurality of striking members provided on the hammer body so as to correspond to the striking members, A plurality of bits each of which has a substantially flat outer periphery without a spline structure and which is mounted on a mounting port and which is struck by a striking member to provide a digging force in the ground direction, A fixing frame having a guide member partially or wholly in contact with the periphery of each bit of each bit so as to prevent idling The. [0001] The present invention relates to a multi-hammer for ground excavation and an air dispersing device for the same, and more particularly, ; An air tank communicating with the air supply means via the joint and having an internal space through which the supplied air can be dispersed; A hammer body coupled to a lower portion of the air tank; A plurality of striking members which are installed at regular intervals in the hammer body and which are dispersed in the air tank and then pressurized and selectively lowered by the air transmitted through the spray passage; And a plurality of bits mounted on a plurality of bit mounting holes formed in the hammer body so as to correspond to the striking member, the plurality of bits being struck by the striking member to provide a digging force in the ground direction, A joint connected to the rotational force providing means and the air supplying means of the ground excavator; A first ejection passage corresponding to the air inlet of the joint, at least one second ejection passage provided around the first ejection passage, and a hammer having a hitting space communicated with the first ejection passage and the second ejection passage, Body; A housing interposed between the joint and the hammer body; And a second jetting passage which is provided in the housing so as to be interposed between the air inlet and the first jetting passage for blocking and reflecting air directly supplied to the first jetting passage to generate a vortex in the housing, An air distribution member having a passage for guiding air in the eddy current state through the first ejection passage at the same pressure as that of the passage; A plurality of striking members installed at predetermined intervals in the hammer body and being selectively lowered in the striking space by the air transmitted through the striking passages; And a plurality of bits mounted on a plurality of bit mounting holes formed in the hammer body so as to correspond to the striking member and provided with excavation force in the ground direction by the striking member, A first outlet passage corresponding to the air inlet of the joint, at least one second outlet passage provided around the first outlet passage, a first outlet passage provided in the vicinity of the first outlet passage, A hammer body provided with a striking space communicated with the passage, a housing interposed between the joint and the hammer body, a plurality of striking members pressed by the air and selectively lowered in the striking space, An air dispersing device mounted on a multi-hammer for ground excavation having a bit struck to provide excavation forces in the ground direction, A vortex generator installed inside the housing to interpose between the air inlet and the first spray passage and blocking and reflecting the air directly supplied to the first spray passage to induce generation of a vortex; And a support for providing a passage for guiding the air to be blown out through the first ejection passage at the same pressure as the second ejection passage. [0001] The present invention relates to a drilling head and a drilling method for drilling an underground with a large diameter by using various drilling equipment, and more particularly, The rock excavation is performed by using a hydraulic hammer which provides a high impact force and the minimum compressed air is supplied and discharged through the hydraulic hammer to prevent the excavated soil and the slime from flowing into the hydraulic hammer, Since it can be installed in various existing perforators by assisting the inflow and outflow to the slime discharge pipe, it is excellent in general purpose and it is possible to perform the large diameter excavation from the minimum 200 mm to the maximum 2000 mm by applying the hydraulic hammer having strong hitting force. The advantages of maximizing and maintaining verticality are excellent, and the above hydraulic hammer The use of the air compressor for operating the existing air hammer is minimized, thereby reducing the noise and reducing the fuel consumption. Thus, the environmental and economical effect is excellent, and the excavated soil and slime are separately discharged from the driving of the hydraulic hammer It is possible to smoothly discharge the excavated soil and the slime in the lower part before proceeding with the excavation work.

As shown in FIGS. 1 and 2, the drill bit drum for drilling as described above is formed by forming an air inlet hole 31 penetrating upward vertically from the lower side of the inclined bent portion formed below the sludge discharge pipe 30, An air inlet hole 31 having a large upper side and a small lower side is formed at the end of the discharge pipe 30 so that air is injected vertically upward into the sludge discharge pipe 30 when the air is supplied, When the operation is stopped, the crushing sludge flows into the air inlet hole 31, and the air inlet hole 31 is blocked, so that the bit drum 10 is taken out from the work hole and separated each time The present invention has been made to solve the above-mentioned problem of the rock drilling bit, so that the introduced air is circulated in the sludge discharge pipe 30 The purpose of this study was to prevent the rock breakage remaining in the discharge pipe from flowing into the air injection hole when the air supply is stopped after the work is finished and at the same time,

According to an aspect of the present invention, there is provided an apparatus for forming a bit drum, comprising an intermediate crushing roller, a central crushing roller, and an outer crushing roller on a bottom surface of a disk constituting a bit drum, And a drilling bit having an air inlet hole for supplying air for discharging sludge to the sludge discharge pipe is formed on the sludge discharge pipe, In the drum, the air injected into the sludge discharge pipe to supply air for discharging the sludge is inclined upward so as to form a vortex in the sludge discharge pipe, and is arranged on the vertical wall of the sludge discharge pipe so as to twist at a predetermined angle in the circumferential direction And the guide feathers are arranged in a spiral direction on the upper side of the air inlet space of the inner peripheral surface of the sludge discharge pipe Castle, which was realized the outer peripheral surface around the air input hole drilling bits drum sludge discharge air input device for configuring an induction collar to drive the air entry.

In the present invention, when the air to be used is indispensably used in order to efficiently discharge the sludge having crushed rocks, the introduced air swirls on the inner wall of the sludge discharge pipe to effectively suck the sludge therein Of course, the induction feather is constituted to induce the flow of the air to be introduced into the air injecting hole, and the air injected into the air injecting hole by the constituent of the guide feathers forms a strong whirl, and at the same time, the sludge filled in the sludge discharging pipe Thereby preventing the air injecting hole from being clogged by the sludge in advance.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 and Fig.
3 is a diagram illustrating an example of a configuration state of a bit drum for excavation according to the present invention.
4 is a view showing an example of the sludge discharge pipe configuration state of the present invention.
Fig. 5 is a plan sectional view illustrating an air injection hole constituting a substantial part of the present invention. Fig.
6 is a vertical cross-sectional view illustrating an air injection hole constituting a substantial part of the present invention.

The configuration of the present invention will be described below.

The center crushing roller 21 and the intermediate crushing roller 22 and the outside crushing roller 23 are formed on the bottom surface of the disk 11 constituting the bit drum 10 and the center crushing roller 21 and the intermediate crushing roller 22 And a thick outer ring 12 on the outer circumferential side of the disk 11 constituting the bit drum 10 is formed in a space between the drum 12 and the sludge discharge pipe 30, And an air inlet hole 31 for supplying air for discharging sludge to the sludge discharge pipe 30 is formed in the sludge discharge pipe 30. The sludge discharge pipe 30 is formed to supply air to the sludge discharge pipe 30 The air injecting hole 31 is inclined upward so as to be twisted at a predetermined angle in the circumferential direction at a vertical wall surface of the sludge discharge pipe 30 so that the air injected into the sludge discharge pipe 30 forms a vortex in the sludge discharge pipe 30, Thereby constituting an air injection device.

Here, the guide vanes 32 are formed in the spiral direction on the upper side of the inner circumferential surface air inlet hole 31 of the sludge discharge pipe 30 and the induction vanes 33 for guiding the incoming air around the outer circumferential surface air inlet hole 31 are formed do.

Hereinafter, the embodiment of the present invention will be described.

First, the excavating bit drum according to the present invention is mounted on an excavator (not shown), and air of strong pressure is supplied to the excavating bit drum 10 from an air supplying compressor (not shown) The center roller 21 and the intermediate roller 22 and the outer roller 23 installed to rotate on the disk 11 of the bit drum 10 while the bit drum 10 rotates are brought into close contact with the rock And the diamond insert tips integrally attached to the respective surfaces of the center roller 21, the intermediate roller 22, and the outer roller 23 while being rotated cause the rock to be broken.

The high pressure air supplied to the bit drum 10 at the same time as the above operation is guided by the induction vanes 33 formed on the outer circumferential surface of the sludge discharge pipe 30 to be upwardly inclined and twisted at an angle in the circumferential direction by an air injection hole 31 So that the sludge is discharged to the inside of the sludge discharge pipe 30.

The air that has entered the sludge discharge pipe 30 is guided by the guide vanes 32 formed in the spiral direction on the upper side of the inner wall air inlet hole 31 of the sludge discharge pipe 30, And is discharged to the outside.

The ground rock sludge and water are sucked together through the suction holes 13 formed integrally with the sludge discharge pipe 30 by the suction pressure generated at the discharge speed of the air discharged to the outside, causing the sludge discharge pipe 30 As shown in FIG.

At this time, the nut 12 formed at the outer edge of the lower end of the bit drum 10 serves to protect the outer roller 23 and to block the crushed rock sludge and water, thereby helping to draw the rock sludge.

When the work is finished or the work is stopped for other reasons, the powerful air pressure supplied from the compressor is stopped, and the rock sludge discharged through the sludge discharge pipe 30 is discharged through the sludge discharge pipe 30 And the amount that can not escape flows into the excavated interior through the sludge discharge pipe 30 again.

In this case, since the air inlet hole 31 formed in the sludge discharge pipe 30 has been upwardly opened without any shield, a part of the backwashing rock sludge enters the air inlet hole 31 to seal the air inlet hole 31 The bit drum 10 is always pulled out of the work hole to be separated from the excavator, and then the work of cleaning the air inlet hole 31 is performed and reinstalled. However, in the present invention, the air inlet hole 31 is connected to the sludge discharge pipe The crushing sludge flowing on the inner wall of the sludge discharge pipe 30 constituting the crushing sludge is formed on the wall surface of the sludge discharge pipe 30, And minimizes the entry of backwashing sludge formed on the vertical wall surface of the sludge discharge pipe (30).

Therefore, the crushing sludge composed of the abrasive grains does not completely block the air inlet hole 31 formed in the sludge discharge pipe 30 of the bit drum 10, so the operation is temporarily stopped. The bit drums 10 are clogged and need not be taken out to be cleaned, which increases the working efficiency.

The present invention described above is an invention to be immediately carried out in an industrial field for excavating rock masses, and its value in industrial use will be great.

10: beat drum 11: disk 12:
13: suction hole 21: central crushing roller 22: intermediate crushing roller
23: Outside crushing roller 30: Sludge discharge pipe 31:
32: lapel pin 33: lead pinion

Claims (2)

The center crushing roller 21 and the intermediate crushing roller 22 and the outside crushing roller 23 are formed on the bottom surface of the disk 11 constituting the bit drum 10 and the center crushing roller 21 and the intermediate crushing roller 22 And a thick outer ring 12 on the outer circumferential side of the disk 11 constituting the bit drum 10 is formed in a space between the drum 12 and the sludge discharge pipe 30, And an air inlet hole (31) for supplying sludge discharge air to the sludge discharge pipe (30) is formed,
An air inlet hole 31 formed in the sludge discharge pipe 30 is formed on a vertical wall surface of the sludge discharge pipe 30 so as to be twisted at a predetermined angle in the circumferential direction while being inclined upward to form a vortex;
The guide feathers 32 are formed in the helical direction on the inner circumferential surface air inlet hole 31 of the sludge discharge pipe 30 and the induction vane 33 for guiding the incoming air is formed around the circumferential surface air inlet hole 31 Further comprising a sludge discharge pipe for discharging the sludge. delete
KR1020150072778A 2015-05-26 2015-05-26 Bit of a crushing sludge discharge pipe for air chute excavation KR101651363B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101964134B1 (en) * 2018-10-23 2019-04-01 삼보씨엠씨 주식회사 Drilling rig apparatus
WO2022114572A1 (en) * 2020-11-30 2022-06-02 송채연 Core barrel hammer system having improved slime discharging and core cutting functions

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06339645A (en) * 1992-02-26 1994-12-13 Mitsuhiro Sekino Polluted fluid capturing apparatus
KR19990037886A (en) 1999-02-11 1999-05-25 김철응 A bace rock digging vit
KR100302077B1 (en) 1998-12-30 2001-11-22 안명숙 Bit for drilling rock bed
KR20050029367A (en) 2003-09-22 2005-03-28 김우중 Lace knitting apparatus
KR20050067489A (en) 2003-12-29 2005-07-04 주식회사 하이닉스반도체 Shallow trench isolation method of semiconductor device
KR20050067493A (en) 2003-12-29 2005-07-05 주식회사 하이닉스반도체 Test method of wafer burn in
KR20090130545A (en) 2008-06-16 2009-12-24 삼성전자주식회사 Method for roaming a mobile terminal in wireless local area network and apparatus therefor

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06339645A (en) * 1992-02-26 1994-12-13 Mitsuhiro Sekino Polluted fluid capturing apparatus
KR100302077B1 (en) 1998-12-30 2001-11-22 안명숙 Bit for drilling rock bed
KR19990037886A (en) 1999-02-11 1999-05-25 김철응 A bace rock digging vit
KR20050029367A (en) 2003-09-22 2005-03-28 김우중 Lace knitting apparatus
KR20050067489A (en) 2003-12-29 2005-07-04 주식회사 하이닉스반도체 Shallow trench isolation method of semiconductor device
KR20050067493A (en) 2003-12-29 2005-07-05 주식회사 하이닉스반도체 Test method of wafer burn in
KR20090130545A (en) 2008-06-16 2009-12-24 삼성전자주식회사 Method for roaming a mobile terminal in wireless local area network and apparatus therefor

Non-Patent Citations (1)

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Title
그리고 상기 드럼을 구성하는 원판의 외주연 하측으로 두께가 두꺼운 원륜상운두를 형성하여 파쇄롤러군이 설치된 내부공간을 좁게 형성함으로써 암반파쇄분을 흡출하는 흡출력이 증대되도록 함은 물론 파쇄롤러군과 원륜상운두 사이에 암반파쇄분이 끼이지 않게 구성하거나, 상기 드럼을 구성하는 원판의 외주연 하측으로 드럼의 회전방향과 동일한 방향으로 경사진 날개를 형성하여 드럼의 회전시 날개와 날개사이를 통하여 물이 드럼내측으로 용이하게 모이도록 함으로써 암반파쇄분을 흡출하는 흡출력이 증대되도록 구성하였으며 여기서 상기 드럼을 구성하는 원판의 외주연 하측에 형성되는 원륜상운두와 날개의 양측에 내마모성이 강한 마모방지용팁을 고정볼트로 고정설치하되 후단을 조정볼트로 결합하여 조정볼트의 조정에 의해 마모방지용팁의 토출길이를 조절토록 구성하며, 드럼을 구성하는 흡출관의 하측에 경사가 완만한 외향팽출부를 형성하고 외향팽출부 하측으로부터 내부로 수직으로 상향관통한 공기분사공을 형성하거나, 상기 흡출관하측에 형성된 경사절곡부 하측으로부터 내부로 수직으로 상향관통한 공기분사공을 형성하여 공기의 분사시 공기압이 배출관의 내측벽면에 부딪히는 현상을 없앰으로써 암반파쇄분의 배출효율을 증가토록 구성한다.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101964134B1 (en) * 2018-10-23 2019-04-01 삼보씨엠씨 주식회사 Drilling rig apparatus
WO2022114572A1 (en) * 2020-11-30 2022-06-02 송채연 Core barrel hammer system having improved slime discharging and core cutting functions
KR20220076282A (en) * 2020-11-30 2022-06-08 송채연 Core barrel hammer system with improved slime discharge and core cutting function
KR102559520B1 (en) * 2020-11-30 2023-07-26 송채연 Core barrel hammer system with improved slime discharge and core cutting function

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