KR20160004494A - Doughnut hammer apparatus and excavation method therefor - Google Patents

Doughnut hammer apparatus and excavation method therefor Download PDF

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Publication number
KR20160004494A
KR20160004494A KR1020140082717A KR20140082717A KR20160004494A KR 20160004494 A KR20160004494 A KR 20160004494A KR 1020140082717 A KR1020140082717 A KR 1020140082717A KR 20140082717 A KR20140082717 A KR 20140082717A KR 20160004494 A KR20160004494 A KR 20160004494A
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KR
South Korea
Prior art keywords
core barrel
modules
hammering
core
pressing modules
Prior art date
Application number
KR1020140082717A
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Korean (ko)
Inventor
권오봉
이현모
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우복기초 주식회사
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Publication date
Application filed by 우복기초 주식회사 filed Critical 우복기초 주식회사
Priority to KR1020140082717A priority Critical patent/KR20160004494A/en
Publication of KR20160004494A publication Critical patent/KR20160004494A/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
    • E21B10/02—Core bits
    • E21B10/04—Core bits with core destroying means
    • 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
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/12—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using drilling pipes with plural fluid passages, e.g. closed circulation systems

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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)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)

Abstract

A doughnut hammer apparatus of a ground excavation facility is disclosed. According to one embodiment of the present invention, the doughnut hammer apparatus comprises: a cylindrical hammer main body of which a bottom surface is opened to enable a cross-sectional surface to have an inner space like a doughnut; bits installed on the bottom surface of the hammer main body; and a core removal member installed on an inner surface providing the inner space to remove a core barrel generated in an excavation process.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a donut-

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a ground drilling apparatus, and more particularly, to a donut-type drilling apparatus and a drilling method which are installed at a tip of an excavator when drilling a concrete pile installed in a field, .

Generally, for construction and bridge foundation work, a work (R.C.D. method) is carried out by installing a file made of steel pipes or the like on a soft ground or an underground layer and performing reinforcement work.

In the case of the above-mentioned R.C.D. method, the excavation work of a large diameter (1000 mm or more) is carried out.

Typically, a drum stabilizer is coupled to a lower end of a drill pipe of a file drilling machine, and a bit body having a plurality of bits coupled in a circumferential direction at a lower portion thereof is installed. Then, the bit body is driven under pressure, There is a method of perforating the digging hole at a time.

Also, when a drum stabilizer is coupled to a lower end of a drill pipe of a file drilling machine, a pipe-shaped bit body is coupled to a lower side of the drum stabilizer, and several bits are provided at a lower end of the bit body, The bit body is rotated together, the bit is scratched on the rock layer to form a donut-shaped groove, and when the core barrel is formed with a predetermined depth, the bit is removed to puncture the drilling hole.

In the case of the core barrel type, as compared with the method of excavating the whole rock layer, there is an advantage that the excavation of the large excavation hole can be minimized while minimizing the excavation area. However, in the operation of cutting and removing the core barrel formed in the excavation process There is a problem that a suction / discharge pipe for discharging the slime to the ground is formed inside the bit body, so that the suction / discharge pipe is frequently clogged.

Embodiments of the present invention provide a donut-type hammering apparatus capable of cutting a core barrel and an excavation method using the same.

Embodiments of the present invention are intended to provide a donut-type hammering apparatus capable of quickly removing a core barrel and an excavation method using the same.

Embodiments of the present invention are intended to provide a donut-type hammering apparatus capable of easily discharging slime and an excavation method using the same.

The objects of the present invention are not limited thereto, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a hammer body having a cylindrical shape, the bottom surface of which is opened such that an inner space is formed like a donut in cross section; Bits installed on the bottom surface of the hammer body; And a core removing member installed on an inner surface of the inner space providing the inner space to remove the core barrel generated during the excavation process.

Further, the core removing member may include upper pressing modules for pressing the upper end of the core barrel; And a lower pressing module for pressing the lower end of the core barrel.

The core removing member may further include a module control unit for controlling the upper pressing modules and the lower pressing modules, The module control unit may actuate any one of the upper pressing modules to press the core barrel in the first direction to collapse the core barrel in the first direction.

In addition, the module control unit may operate any one of the lower pressing modules disposed opposite to the first direction to press the lower end of the core barrel in a second direction opposite to the first direction.

Further, each of the upper pressing modules and the lower pressing modules may include hydraulic jacks operated by hydraulic pressure.

In addition, at least three or more upper pressure modules and lower pressure modules may be installed at regular intervals along the circumferential direction.

Also, a donut-type drilling device of a ground excavation facility may include discharge ducts formed on an outer surface of the hammering body for discharging a slime generated in an excavation process to the outside; And air discharge openings provided on the bottom surface of the hammering body for discharging air supplied from the outside.

In addition, the discharge channels may be formed linearly or spirally on the outer surface of the hammer body.

According to an aspect of the present invention, there is provided a method of drilling a ground, comprising the steps of: And removing the core barrel produced in the excavation process; Removing the core barrel in the first direction by pressing one of the upper pressing modules to press the core barrel in the first direction; Operating both the upper and lower pressing modules to clamp the core barrel; And a withdrawing step of lifting the hammering body from the excavation hole while the core barrel is clamped by the upper pressing modules and the lower pressing modules.

The embodiments of the present invention have a remarkable effect capable of not only excavation but also cutting and removing of the core barrel produced in the excavation process.

The embodiments of the present invention have a remarkable effect of minimizing the clogging of the discharge channels through which the slime is discharged.

1 is a perspective view showing a donut-hammering apparatus of a ground excavation facility according to an embodiment of the present invention
2 is a side cross-sectional view of the donut-drill apparatus shown in Fig.
FIG. 3 is a view showing the use state of the donut-hammer apparatus.
4A is a view showing a process in which a core barrel is formed on a rock layer by a donut-hammering device.
FIG. 4B is a view showing a process of cutting a core barrel formed on the Anvan layer.
4C is a view showing a process of pulling out the cut core barrel.
5 is a view showing a hammering main body having a helical discharge passage.
6 is a view showing a modified example of the hammer main body.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and will be described in detail in the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout the specification and claims. The description will be omitted.

FIG. 1 is a perspective view showing a donut-type drilling device of a ground excavation facility according to an embodiment of the present invention, FIG. 2 is a side sectional view of the donut-type drilling device shown in FIG. 1, FIG.

1 to 3, a donut-type hammering apparatus 10 according to an embodiment of the present invention includes a hammering body 100, bits 200, and a core removing member 300.

The hammering body 100 may be provided in a cylindrical shape whose bottom face is opened so that the inner space 104 is formed like a donut in cross section. The hammering body 100 is mounted at the lower end of the connecting rod 20 and a connecting shaft 102 for connecting with the connecting rod 20 is formed to protrude from the upper end. The hammering body 100 is driven in conjunction with the rotation of the connecting rod 20 to excavate the ground and rock layers.

On the other hand, the hammering main body 100 has discharge outlets 110 on its outer side and air outlets 120 on its bottom. The discharge flow paths 110 are a flow path through which high-pressure air for withdrawing slime is discharged to the outside. Slime refers to dirt, mud, gravel, and rock crushed material that are generated when excavating the ground. 1, the discharge passage 110 may be linearly formed on the outer surface of the hammering body 100, but may be formed in a spiral shape on the outer surface of the hammering body 100 as shown in FIG.

The bits 200 are installed on the bottom surface of the hammering body 100. That is, the bits 200 may be installed at regular intervals on the bottom surface 106 of the ring-shaped hammering main body 100. In this embodiment, four bits 200 are provided in the circumferential direction along the rim of the bottom surface 106 of the hammering main body 100, but this is merely an example, and the number of the mounts and the shapes of the bits may vary It is possible. The bits 200 receive the rotational force and the biasing force from the hammering main body 100 and scrape the other side of the arm to crush the rock so that a donut-shaped groove is formed.

The slime generated in the excavation process causes the high pressure air supplied to the hammering body 100 to be blown into the air discharge openings 120 formed in the bottom surface 106 of the hammering body 100, And smoothly moves upward through the discharge flow paths 110 formed on the outer peripheral surface. As such, since the discharge flow paths 110 are formed on the outer circumferential surface of the hammering body 100, the present invention minimizes the clogging of the flow paths by the slime, and enables faster movement.

The core removal member 300 is installed in the hammering body 100. The core removing member 300 is for removing the core barrel C (shown in FIG. 3) generated at a predetermined height in the excavation process. The core removal member 300 mainly includes an upper pressure module 310 and a lower pressure module 320, and a module control unit 330 for controlling them. The upper pressure modules 310 and the lower pressure module 320 are installed on the inner side surface 108 of the hammering main body 100 and the module control unit 330 controls the hydraulic pressure supplied to the ground (Not shown).

The upper pressurizing modules 310 are provided to be positioned above the inner space 104 of the hammock main body 100 to press the upper end of the core barrel C and the lower pressurizing modules 320 are provided at the lower end To be positioned below the internal space 104 of the hammering body 100 to pressurize the hammering body 100. A plurality of upper pressing modules 310 and lower pressing modules 320 may be provided along the inner side surface 108 of the hammering body 100. In the present embodiment, four upper and lower pressing modules 310 and 320 are provided at intervals of 90 degrees. The upper pressurizing module 310 and the lower pressurizing module 320 may be a hydraulic jack module operated by hydraulic pressure.

The module control unit 330 controls the hydraulic pressures supplied to the upper and lower pressing modules 310 and 320. That is, the module control unit 330 selectively disconnects the operation of the upper and lower pressing modules 310 and 320 in the step of cutting the core barrel C and the step of clamping and drawing the core barrel C, .

FIG. 4A is a view showing a process of forming a core barrel in a rock layer by a donut-type hammering apparatus, FIG. 4B is a view showing a process of cutting a core barrel formed on the Avenan layer, Fig.

As shown in FIG. 4A, the bits 200 receive the rotational force and the biasing force from the hammer body 100 to scratch the arm, thereby forming a donut-shaped groove, and the core barrel C having a certain depth is formed in the excavator.

4B, when the core barrel C is formed, the lower end of the core barrel C is cut. The core barrel cutting operates one of the upper pressing modules 310 to press the upper end of the core barrel C in the first direction X1 to collapse the core barrel C in the first direction. In order to more effectively perform the cutting operation of the core barrel C, the lower pressing module 320, which is arranged to face the first direction of the lower pressing modules 320, is operated to move the lower end of the core barrel C to the first In the second direction X2 opposite to the direction. The upper and lower pressing modules 310 and 320 press the upper and lower pressing modules 310 and 320 in opposite directions simultaneously or sequentially at the upper and lower ends of the core barrel C, ) Can be more easily cut from the rock layer.

4C, the core barrel C cut from the rock layer lifts the hammering body 100 from the excavation hole in a state where the upper hammers 310 and the lower hammering modules 320 are driven and clamped, So that the removal of the core barrel C can be performed quickly.

6 is a view showing a modified example of the hammer main body.

As shown in FIG. 6, the hammer body 100a has an inlet 104a with a narrow internal space and an inlet 104a with a narrow internal space to more effectively reduce the core barrel. And an expansion space 104b that is wider than the entrance. That is, by providing the area where the upper pressurizing motors 310 and the lower pressurizing modules 320 are disposed to be wider, it is possible to secure a sufficient distance between the core barrel C and the inner side surface 108 of the main body 100 . Therefore, it is possible to prevent the core barrel C, which is pressed by the upper and lower pressing modules 310 and 320, from contacting the inner surface 108 of the hammering body 100 during the cutting process.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

100: Hammer body 200: bit
300: core removal member

Claims (10)

A donut hammer device comprising:
A cylindrical hammering body having a bottom open at its end surface to form an inner space such as a donut;
Bits installed on the bottom surface of the hammer body; And
And a core removing member installed on an inner surface of the inner space providing the inner space to remove the core barrel generated in the excavation process. The method according to claim 1,
The core removal member
Upper pressure modules for pressing the upper end of the core barrel; And
And lower pressure modules for pressing the lower end of the core barrel. 3. The method of claim 2,
The core removal member
Further comprising: a module control unit for controlling the upper pressing modules and the lower pressing modules;
The module control unit
Wherein one of the upper pressing modules is operated to press the core barrel in a first direction to collapse the core barrel in the first direction. The method of claim 3,
The module control unit
And the lower end of the core barrel is operated in a second direction opposite to the first direction by operating any one of the lower pressing modules disposed opposite to the first direction. 3. The method of claim 2,
Each of the upper pressing modules and the lower pressing modules
Wherein the hydraulic jacks are hydraulically actuated. 3. The method of claim 2,
The upper pressing modules and the lower pressing modules
Wherein at least three or more donut-type hammers are installed at regular intervals along the circumferential direction. 3. The method according to claim 1 or 2,
The donut hammering device of the ground excavation equipment
Discharge ducts formed on an outer surface of the hammering body for discharging slime generated in the excavation process to the outside; And
Further comprising air ejecting openings provided on a bottom surface of the hammering main body for ejecting air supplied from the outside. 8. The method of claim 7,
Wherein the discharge channels are formed linearly or spirally on an outer surface of the hammer body. The method according to claim 1,
The inner space of the hammer body
An inlet for inserting a core barrel generated in the excavation process, and an expansion space wider than the inlet,
Wherein the core removal member is located in the expansion space. A ground excavation method using the donut-type hammering apparatus according to claim 1,
Drilling the ground by rotating the hammer body; And
Removing the core barrel produced in the excavation process;
The core barrel removal step
Operating one of the upper pressing modules to press the core barrel in a first direction to collapse the core barrel in the first direction;
Operating both the upper and lower pressing modules to clamp the core barrel; And
And a withdrawing step of lifting the hammering body from the excavating hole while the core barrel is clamped by the upper pressing modules and the lower pressing modules.
KR1020140082717A 2014-07-02 2014-07-02 Doughnut hammer apparatus and excavation method therefor KR20160004494A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020140082717A KR20160004494A (en) 2014-07-02 2014-07-02 Doughnut hammer apparatus and excavation method therefor

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Application Number Priority Date Filing Date Title
KR1020140082717A KR20160004494A (en) 2014-07-02 2014-07-02 Doughnut hammer apparatus and excavation method therefor

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190085034A (en) * 2016-12-19 2019-07-17 바우어 머쉬넨 게엠베하 Rotary drilling tools and methods for creating bores
KR102069282B1 (en) * 2019-05-03 2020-02-11 송채연 Excavation hammers for core barrel work that can be used for rock excavation and core cutting by turning direction of rotation
KR20210000883A (en) * 2019-06-26 2021-01-06 송채연 Excavation hammers for Concentric core type core barrel work

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190085034A (en) * 2016-12-19 2019-07-17 바우어 머쉬넨 게엠베하 Rotary drilling tools and methods for creating bores
KR102069282B1 (en) * 2019-05-03 2020-02-11 송채연 Excavation hammers for core barrel work that can be used for rock excavation and core cutting by turning direction of rotation
KR20210000883A (en) * 2019-06-26 2021-01-06 송채연 Excavation hammers for Concentric core type core barrel work

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