WO2020189981A1 - Trépan de forage de type à récupération - Google Patents

Trépan de forage de type à récupération Download PDF

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Publication number
WO2020189981A1
WO2020189981A1 PCT/KR2020/003547 KR2020003547W WO2020189981A1 WO 2020189981 A1 WO2020189981 A1 WO 2020189981A1 KR 2020003547 W KR2020003547 W KR 2020003547W WO 2020189981 A1 WO2020189981 A1 WO 2020189981A1
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WO
WIPO (PCT)
Prior art keywords
bit
wing
housing body
hinge pin
excavation
Prior art date
Application number
PCT/KR2020/003547
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English (en)
Korean (ko)
Inventor
정순용
Original Assignee
(주)나다건설
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by (주)나다건설 filed Critical (주)나다건설
Publication of WO2020189981A1 publication Critical patent/WO2020189981A1/fr

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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
    • E21B10/62—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable
    • 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
    • E21B10/36—Percussion drill bits
    • E21B10/40—Percussion drill bits with leading portion
    • 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
    • E21B10/64—Drill bits characterised by the whole or part thereof being insertable into or removable from the borehole without withdrawing the drilling pipe
    • E21B10/66—Drill bits characterised by the whole or part thereof being insertable into or removable from the borehole without withdrawing the drilling pipe the cutting element movable through the drilling pipe and laterally shiftable

Definitions

  • the present invention relates to a recovery type perforation bit, and more particularly, the perforation bit used for ground perforation can be easily recovered through the inside of a steel casing, a more effective and efficient perforation construction is possible, and excellent fabrication is possible. It relates to a recoverable perforation bit that can be secured.
  • the ground drilling bit receives driving force and pneumatic pressure from the ground excavator, and performs a function of drilling the soil and rock layers by the rotational force and impact provided by the external force during drilling.
  • the ground excavation bit is located at the tip of a hammer driven by pneumatic pressure provided from an external ground excavator, and crushes the ground by the rotational force and impact transmitted from the hammer and advances while drilling.
  • FIG. 1 is a schematic diagram of perforation of ground or rock using a steel casing, in order to prevent the excavation hole from collapsing during the actual ground excavation work, a pipe-shaped steel casing is inserted into the excavation hole while excavation is performed.
  • a pipe-shaped steel casing is inserted into the excavation hole while excavation is performed.
  • the steel casing 2 prevents the hollow wall from collapsing, and is temporarily or permanently left in the ground even after the hammer bit 3 is removed after drilling is completed.
  • the hammer bit 3 advances into the space secured by perforating the ground or rock by rotating while pressing or hitting the ground by an external power source.
  • the hammer bit In the excavation using such a steel casing, the hammer bit has a larger rotation diameter than the outer diameter of the casing by spreading the wing bit to the outer side of the pilot bit during excavation, and an enlarged bit having a structure that can be folded into the casing during recovery should be used.
  • Techniques for the enlarged bit are disclosed in, for example, Korean Patent Registration Nos. 10-0461525 and 10-0871127.
  • the guide device hit by the pneumatic piston, the pilot bit located under the guide device, and the bottom surface of the pilot bit in the non-diameter state are located substantially on the same plane as the tip surface of the pilot bit. It includes a wing bit that slides in an inclined upward direction as excavation begins and is converted into an enlarged state.
  • the expansion bit having the above structure generates extreme noise and has a disadvantage in that the excavation speed is very slow.
  • the wing bit which is fitted to the bit housing so as to be raised and lowered obliquely, protrudes out of the outer diameter of the bit housing to perform excavation, and the outer end of the wing bit is located within the outer diameter of the bit housing, allowing recovery.
  • This structure has a drawback of excessively restricting the relative movement between the bit housing and the wing bit, and there is a great concern of malfunction in an environment with many foreign substances.
  • the present invention for solving the above-described conventional problem, the drilling bit used for ground drilling can be easily recovered through the inside of the steel casing, a more effective and efficient drilling construction is possible, and excellent fabrication is possible. Its purpose is to provide a recoverable perforation bit that can be secured.
  • the present invention for achieving the objects and other features of the present invention is provided by being hinged to a bit housing body and one end portion of the bit housing body through a hinge pin so as to excavate the ground or rock while rotating inside the steel casing.
  • the pair of wing bits is provided with a plurality of carbide buttons on the excavation surface, which is a surface facing the excavation direction for excavating the ground or rock, and one side of the steel casing is
  • the first hinge includes a bit body portion including a bit body portion protruding portion protruding outward, and a bit coupling portion formed by protruding the other side of the bit body portion in a direction opposite to the excavation direction, and having a first hinge hole formed therein.
  • One or more slime discharge units formed of a first wing bit and a second wing bit that are provided to be rotated at a certain angle around the ball, and the bit housing body is formed to allow the discharging of the ores generated by crushing the ground or rock And, a bit body portion accommodation space capable of accommodating the bit body portion corresponding to the bit body portion, and the bit body portion accommodation space is extended to accommodate a bit coupling portion capable of receiving the bit coupling portion corresponding to the bit coupling portion.
  • the recovery type drilling bit according to the present invention provides the following effects.
  • the present invention has the effect of being able to easily recover the drilling bit used for ground drilling through the inside of the steel casing.
  • the present invention has the effect of providing durability while minimizing parts, maintaining a solid fixing force, and performing excellent drilling construction with reliable excavation at the excavation center.
  • the present invention has an excellent effect of manufacturing.
  • the present invention has the effect of being able to easily discharge the slime generated by crushing the ground or rock mass to the outside.
  • FIG. 1 is a diagram showing a schematic diagram of drilling of a ground or rock mass using a steel casing.
  • FIG. 2 is a perspective view showing a recoverable perforation bit according to the present invention.
  • FIG. 3 is an exploded perspective view showing a recoverable perforation bit according to the present invention.
  • FIG. 4 is a perspective view of the bit housing body constituting the recoverable perforation bit according to the present invention as viewed from the lower side.
  • FIG. 5 is a cross-sectional view showing a bit housing body constituting a recoverable perforated bit according to the present invention.
  • FIG. 6 is a bottom plan view showing a recoverable perforation bit according to the present invention.
  • FIG. 7 is a perspective view as viewed from one side of the wing bit constituting the recoverable perforation bit according to the present invention.
  • FIG. 8 is a view showing a part of the bit body part (protrusion of the bit body part) of the recoverable perforated bit according to the present invention.
  • FIG. 9 is a view showing that the recovery type perforation bit according to the present invention passes through a steel casing.
  • FIG. 10 is a perspective view showing another embodiment of a bit housing body constituting a recoverable perforated bit according to the present invention according to the present invention.
  • the bit housing body and one end portion of the bit housing body are hinged through a hinge pin to excavate the ground or rock while rotating inside the steel casing.
  • the pair of wing bits is provided with a plurality of carbide buttons on the excavation surface, which is a surface facing the excavation direction for excavating the ground or rock mass, and one side during excavation Including a bit body portion including a bit body portion protruding portion provided to protrude outward of the steel casing, and a bit coupling portion in which the other side of the bit body portion protrudes in a direction opposite to the excavation direction, and the first hinge hole is formed,
  • the slime discharging portion, the bit body portion accommodation space capable of accommodating the bit body portion corresponding to the bit body portion, and the bit body portion accommodation space extend to accommodate the bit coupling portion corresponding to the bit coupling portion.
  • the bit coupling part receiving space, the second hinge hole formed on the side of the bit coupling part receiving space and formed at a position corresponding to the first hinge hole, and the bit housing body are formed through in the elongated direction to inject air It includes a possible air injection hole, the wing bit and the bit housing body is provided with a recovery type perforation bit, characterized in that it comprises one or more air transfer parts for transferring the air injected from the air injection hole to the outside of the perforation bit do.
  • the at least one air transmission part is formed on one side of the wing bit or is formed in a form penetrating the inside of the wing bit, the first air transmission part formed in communication with the air injection hole, and the bit coupling
  • a second air transmission part formed on the sidewall of the bit coupling part accommodation space to be additionally accommodated, a third air delivery part formed by cutting a part of each sidewall of the bit body part accommodation space facing the bit body part, and one end
  • the air injection hole and the other end may include at least one of the fourth air delivery unit communicating with the outside of the bit housing body.
  • the second air transmission unit is a groove formed in a longitudinal direction on the sidewall of the bit coupling portion accommodating space at a portion corresponding to the edge of the bit coupling portion of each wing bit, and the bit coupling of each of the wing bits.
  • the negative edge may be formed of at least one of the chamfered portions formed by chamfering.
  • the third air transmission unit may be formed by cutting a portion of a sidewall forming a space for accommodating the bit body portion of the bit housing body.
  • the fourth air transmission unit may be formed to communicate with the air injection hole of the bit housing body, and the other end to be in communication with the outside of the bit housing body while oriented in a direction opposite to the excavation direction.
  • a temporary fixing member including a wire or cable tie is penetrated in a state in which the pair of wing bits are gathered, and a temporary fixing member mounting part is further provided.
  • the bottom surface of the bit body portion facing the direction opposite to the excavation direction from the bit body portion is formed as a stepped surface, and is located on one side of the bit body receiving space facing the excavation direction in the bit body receiving space. It is provided to be rotatable on a surface formed as a jaw surface, and the bottom of the bit coupling portion facing the direction opposite to the excavation direction from the bit coupling portion is rotatable on the bottom of the bit coupling portion receiving space facing the excavation direction from the bit coupling portion receiving space.
  • the outer side of the hinge hole of the bit coupling part which is a surface adjacent to the outer diameter of the bit housing body in the bit coupling part, is on the side of the hinge hole of the bit coupling part accommodating space in which the second hinge hole is formed at the side of the bit coupling part receiving space.
  • bit coupling portion facing one direction of the bit body portion from the bit coupling portion is rotatably provided on the side of the bit coupling portion accommodating space in which the second hinge hole is not formed, and the bit coupling portion
  • the accommodation space is formed with a depth in the excavation direction smaller than a width in a direction perpendicular to the excavation direction, the bit housing body has a rotation axis of the bit housing body intersects the hinge pin, and the pair of wing bits Each can be configured to rotate less than 45 degrees.
  • the first wing bit and the second wing bit constituting the pair of wing bits may have different thicknesses of portions extending in a direction orthogonal to the hinge axis when looking at the excavation surface.
  • the wing bit having a relatively thick thickness includes a central carbide button constituting a plurality of carbide buttons, and the central carbide button includes a point on the circumference of the central carbide button on the rotation axis of the bit housing body.
  • the rotation axis of the bit housing body may be positioned within a distance of 1.5 to 2 times the diameter of the central carbide button.
  • one of the pair of wing bits in the center line of the space in which the bit coupling portions of each of the pair of wing bits are accommodated when viewed from the coupling direction of the hinge pin in the bit coupling portion accommodation space, one of the pair of wing bits
  • the center line of the space in which the bit coupling part of the wing beat of is accommodated and the center line of the space in which the bit coupling part of the other wing beat is accommodated are formed to be shifted, that is, not located on the same line. I can.
  • the hinge pin is provided at an end of the hinge pin and further comprises a hinge pin fixing means for preventing the hinge pin from being separated, and the hinge pin may be provided to cross the rotation axis of the bit housing body. have.
  • ... unit ... unit
  • ... module a unit that processes at least one function or operation, which is hardware, software, or hardware and It can be implemented as a combination of software.
  • Figure 2 is a perspective view showing a retrievable perforation bit according to the present invention
  • Figure 3 is an exploded perspective view showing a retrievable perforation bit according to the present invention
  • Figure 4 is a bit housing body constituting the retrievable perforation bit according to the present invention Is a perspective view as viewed from a lower side
  • FIG. 5 is a side view showing a bit housing body constituting a recoverable perforated bit according to the present invention.
  • 6 is a bottom plan view showing a recoverable perforation bit according to the present invention
  • Figure 7 is a perspective view of a wing bit constituting the recoverable perforation bit according to the present invention, as viewed from one side
  • Figure 8 is a recoverable type according to the present invention. It is a figure showing a part of the bit body part (protrusion part of the bit body part) of a drilling bit.
  • the recovery type perforation bit according to the present invention is provided in a perforation bit including a bit housing body and a pair of wing bits hinged to one end of the bit housing body so as to rotate inside a steel casing to excavate ground or rock.
  • a perforation bit including a bit housing body and a pair of wing bits hinged to one end of the bit housing body so as to rotate inside a steel casing to excavate ground or rock.
  • the pair of wing bits 100 is provided with a plurality of carbide buttons 111 on a surface facing the excavation direction in which the ground or rock is excavated, and one side is The bit body portion 110 including the bit body portion protruding portion 112 provided to protrude outward of the steel casing, and the other side of the bit body portion 110 protruding in a direction opposite to the excavation direction, the first hinge A first wing bit 101 and a second wing bit (including the bit coupling portion 120 having the ball 121) provided so as to be rotated at a predetermined angle around the first hinge hole 121 102), and the bit housing body 200 includes a slime discharging unit 203 formed to allow discharging of mineral teeth generated by crushing the ground or rock, and a bit body unit corresponding to the bit main unit 110
  • the bit body receiving space 210 that can accommodate 100 and the bit body receiving space 210 are extended so that the bit coupling part 120 can be accommodated in correspondence with the bit coupling part 120.
  • the pair of wing bits 100: 101, 102 and the bit housing body 200 are hinged through a hinge pin H coupled to the first hinge hole 121 and the second hinge hole 230, Accordingly, each of the pair of wing bits 100 rotates at one end of the bit housing body 200 around the first hinge hole 121 and the second hinge hole 230 at an angle.
  • the bit body portion 110 is formed in a cross-sectional "L" shape when viewed from the excavation surface, and the bit coupling part 120 is located on one side of the rear side of the relatively long side Is formed.
  • the first wing bit 101 and the second wing bit 102 are preferably formed by chamfering the corners 105 on the side facing each other (Figs. 6).
  • the protruding portions 112 of the bit body portion of the pair of wing bits 100 excavate the ground or rock while protruding to the outside of the bit housing body 200 and to the outside of the steel casing.
  • the first wing bit 101 and the second wing bit 102 may be rotated at a certain angle about the hinge axis to reduce their diameter, at this time, a diameter smaller than the outer diameter of the bit housing body 200 and the inner diameter of the steel casing It is possible to freely pass into the inside of the steel casing, and thus can be easily recovered when the excavation construction is completed.
  • the first wing bit 101 and the second wing bit 102 are introduced through a steel casing, the first wing bit 101 and the second wing through a temporary fixing member such as a wire or cable tie It may further include a temporary fixing member mounting portion capable of mounting the temporary fixing member in a state in which the bits 103 are collected.
  • the temporary fixing member is not limited to a wire or a cable tie, and is not particularly limited as long as it is a configuration capable of being removed by an operator after being inserted through a steel casing in a state in which a pair of wing bits 100; 101, 102 are gathered.
  • the temporary fixing member mounting portion is a first mounting hole formed in the side wall of the bit housing body 200 facing the bit body portion 110 of the wing bit (100; 101, 102) as illustrated in FIG. 201), and the wing bit (100: 101, 102), each of which is formed through the bit body portion of the wing bit at a position corresponding to the first mounting hole 201 in a state that is mounted in the bit coupling portion accommodating space. It may be composed of two mounting holes 202.
  • the pair of wing bits 101 and 102 is temporarily fixed through the temporary fixing member in a state gathered by rotating the hinge axis as an axis.
  • a plurality of carbide buttons 111 for excavating ground or rock are provided on the excavation surface of the wing bits 100: 101 and 102. It is preferable that the carbide buttons 111 do not overlap each other when rotating and do not generate blanks. That is, a plurality of carbide buttons 111 are provided, but they must be arranged so that they are uniform for smooth and efficient excavation and no gaps in excavation occur.
  • the wing bits 100 may include the bit body portion 110 and the bit coupling portion 120, for example, in a'L' shape.
  • the bit body part 110 is a part to excavate the ground or rock including the carbide button 111 and the bit body part protrusion 112 on the excavation surface
  • the bit coupling part 120 is a first hinge hole 121 It is a part which connects the wing bits 100: 101 and 102 to the bit housing body 200 so as to be rotatable.
  • the bottom surface of the bit body portion 110 in contact with the bit coupling portion 120 may be formed to be stepped in two stages.
  • the bit body portion seating surface 261a on which the bottom surface of the bit body portion 110 is seated may be formed to be relatively stepped downward (see FIG. 4 ).
  • Reference numeral 261b denotes a portion that protrudes relatively upwards compared to the bit body seating surface 261a, and the side of the wing bit comes into contact with the side of the protruding portion, so that rotational restraint force can be secured more reliably. This will be described in more detail below.
  • the wing bit (100: 101, 102) is formed in the wing bit (100) and the bit housing body (200) to deliver the air injected from the air injection hole (130) to the excavated ground or rock
  • One or more air delivery units 240, 251, 252, and 253 that are formed to be provided are provided.
  • the air injection unit may be a groove formed on one side of the wing bit (100: 101, 102), is formed in a form penetrating the inside of the wing bit (100: 101, 102), and communicates with the air injection hole (130) Combination of the first air transmission unit 240 formed on the first wing bit 101 and the second wing bit 102, respectively, and the first wing bit 101 and the second wing bit 102
  • a second air delivery unit 251 formed on at least one of the sidewalls of the bit coupling unit accommodation space 220 in which the unit 120 is accommodated and the wing bits 100: 1010 and 102, and the first wing bit ( 101) and a third air delivery unit 252 formed by cutting a portion of each sidewall of the bit body receiving space 210, where the side surfaces of the bit body unit 110 of the second wing bit 102 are opposite, and One end is in communication with the air injection hole 130 of the bit housing body 200 and the other end includes at least one of the fourth air delivery units 253 communicating with the outside of the
  • the first air delivery part 240 is the air injection hole at one end (one wall surface) of the first wing bit 101 and the second wing bit 102 on the side where the hinge axis is formed in the drawing. 130) and communication is formed.
  • the second air transmission unit 251 is a bit coupling portion accommodating space 220 at a portion corresponding to the edge portion of the bit coupling portion 120 of each of the pair of wing bits 101 and 102 It may be formed in a groove shape 251 in the longitudinal direction on the side wall of the.
  • the second air transmission unit 251 may be formed by chamfering the edge portions of the bit coupling portions 120 of the wing bits 100: 101 and 102 instead of the groove shape.
  • the second air transmission part 251 may be formed in both the bit coupling part accommodating space and the wing bit with chamfered corners.
  • the third air transmission part 252 is formed as a cutout part in which a side wall of the bit body part accommodating space of the bit housing body 200 is cut, and the rotation shaft of the first wing bit 101 and the second wing bit 102 It is formed by cutting a part of the front side of the side to be positioned.
  • the third air transmission part 252 is partially cut off the sidewall of the bit body receiving space corresponding to the space formed on the opposite side of the bit body part protrusion 112 of the wing bits 101 and 102 Is formed.
  • the fourth air delivery unit 253 has one end communicated with the air injection hole 130 of the bit housing body 200, and the other end in the opposite direction to the excavation direction (that is, the bit housing body ( It is formed to be in communication with the outside of the bit housing body 200 while facing the rear of 200).
  • the air injection hole 130 of the bit housing body 200 is formed through the center of the bit housing body 200 because high-pressure air must be stably injected even when the perforated bit is rotated at high speed. It is desirable.
  • the air injection hole 130 is formed as a long hole as well as shown in FIG. 4, but the central portion may be formed larger than that of both sides.
  • the bit housing body 200 includes a slime discharge unit 203, and the slime discharge unit 203 is preferably formed on the outer side of the bit housing body 200, and as shown in the drawing, the bit housing A portion of the outer portion of the body 200 may be formed as a reduced space.
  • the slime discharge part 203 is formed as a space in which a part of the outer part of the bit housing body 200 is reduced, when the bit housing body 200 is positioned inside the steel casing, a part of the outer part of the bit housing body 200 The reduced space becomes possible to act as a discharge passage for the ore along with the inner surface of the steel casing.
  • the central axis of the hinge pin coupling the pair of wing bits 100 and the bit housing body 200 crosses the rotation axis of the bit housing body 200.
  • the wing bits (100: 101, 102) are rotated around an axis on which the retrievable perforation bit is rotated. Since the hinge pin is positioned around the hinge axis, the hinge pin can more stably connect the bit housing body 200 and the wing bits 100: 101 and 102 when the bit housing body 200 rotates.
  • the bottom of the bit body portion 110 facing the direction opposite to the excavation direction from the bit body portion 110 is the bit body facing the excavation direction in the bit body receiving space 210
  • the bottom of the bit coupling part facing the opposite direction from the bit coupling part 120 to the stepped surface 261a formed on one side of the bottom of the sub-accommodating space 210 is the bit coupling part receiving space 220 It is provided in the bit coupling portion receiving space (ie, the surface formed by opening the air injection hole 130) 220 facing the excavation direction, and the excavation surface of the wing bit 100 is configured in the same plane.
  • the bottom surface of the bit body receiving space 210 in which the bottom surface of the bit body unit 110 is seated is The seating surface 261a on the side to be seated is made in a form that is recessed downward than the other side 261b.
  • a portion on which the bit body portion 110 is seated at the bottom of the bit body portion accommodation space is formed as a stepped surface stepped downward.
  • the seating surface 261a on the side where the bottom surface of the bit body portion 110 is seated is formed as a stepped surface that is recessed than the other side 261b, so that the wing bits 100: 101, when the perforated bit is rotated at high speed. It is possible to further improve the stability by increasing the binding force for the direction of rotation of 102).
  • bit housing body constituting the recoverable perforated bit according to the present invention according to the present invention, so that the seating surface on which the bit body portion 110 of the wing bit is seated is on the same plane as the other side. It can also be formed. In other words, the bottom surface of the bit body receiving space is formed in the same plane.
  • the outer wall of the bit coupling portion 120 is adjacent to the side wall of the bit housing body 200 in which the second hinge hole 230 is formed, with a pivotable gap, and the front wall of the bit coupling portion 120 is a second
  • the hinge hole 230 is supported adjacent to and having a rotatable gap on the inner side of the bit coupling portion accommodating space in which the hinge hole 230 is not formed.
  • the bit coupling part receiving space of the bit housing body 200 is formed by extending a part of the bit body receiving space in a direction opposite to the excavation, and each of the bit body receiving space and the bit coupling part receiving space The sides and bottoms are supported adjacent to each other with a pivotable gap in the corresponding portions of the wing bits 100: 101, 102.
  • the bottom surface of the bit body portion is supported on the bottom surface 261 of the bit body portion accommodation space 210, and the bottom surface of the bit coupling portion is provided in the seating spaces 262a and 262a of the bit coupling portion accommodation space 220.
  • the bit coupling part accommodating space 210 of the bit housing body 200 is formed as a rectangular space in which the bit coupling portions of the first and second wing bits 101 and 102 are accommodated. As shown, the space in which each wing bit is accommodated is formed to be shifted.
  • the center (C1) of one space 262a in each of the spaces 261a and 262b in which the bit combining parts 120 of each wing bit are accommodated in the bit combining part receiving space 210 It is preferable that the space 262b is configured not to be located on the same line as the center C2 of the space 262b, that is, formed to be located on a different line. In other words, it is configured such that the center C1 of one space 262a is shifted (“D”) with respect to the center C2 of the other space 262b.
  • the wing bits 100: 101 which receive strong resistance by strong external forces in the three directions of up, down, left and right, 102) more stably in the top, bottom, left and right.
  • the wing bits (100: 101, 102) are rotated at a certain angle, it has the effect of supporting more accurate one-way stable rotation.
  • the rotation angle at which the wing bits 100: 101, 102 are rotated about the hinge axis is less than 45 degrees.
  • the depth (L1) of the bit coupling part accommodating space (220) in the excavation direction is the length (width) (L2) in the direction perpendicular to the excavation direction. Is formed smaller.
  • the shape and ratio of the bit coupling part accommodating space 220 is related to a certain angle at which the wing bits 100: 101 and 102 are rotated. That is, since the wing bits 100: 101 and 102 are rotated only at an angle less than 45 degrees, the depth of the bit coupling part accommodating space 220 is formed smaller than the width.
  • the bit body part 110 and the bit coupling part of the wing bits 100: 101, 102 This is because (120) cannot secure the necessary strength, so that the strength to perform excavation cannot be secured.
  • FIG. 9 is a view showing that the recoverable perforated bit according to the present invention passes through the inside of the steel casing.
  • the bit body protrusion 112 is the bit body protrusion 112 includes a bit body portion rotation-corresponding surface 112a, a bit body portion protrusion side surface 112b, and a bit body portion shaft tube-corresponding surface 112c.
  • the bit body portion rotation-corresponding surface 112a When the bit body portion 110 is rotated at a certain angle, the bit body portion rotation-corresponding surface 112a has a portion opposite to the excavation direction so that a part of the bit body portion protrusion portion 112 corresponds to the inner diameter of the steel casing. It is formed by chamfering.
  • the bit body part rotation-corresponding surface (112a) smoothly corresponds to the shape of the inner surface of the steel casing. It is intended to be moved. Accordingly, the bit body portion rotation-corresponding surface 112a may be chamfered in a curved shape that is part of a cylindrical surface identical to the shape of the inner surface of the steel casing.
  • bit body protrusion side surface 112b is a side facing the direction in which the bit body protrusion 112 protrudes, and the bit body portion rotation-corresponding surface 112a and the bit body shaft tube-corresponding surface 112c are the bit body portion. It may be understood that a portion of the protrusion 112 and the protrusion side 112b of the bit body portion are chamfered.
  • bit body portion protrusion side surface 112b may be formed in a curved shape that is a part of the cylindrical surface in order to be smoothly connected to a curved shape that is a part of the cylindrical surface of the bit body portion rotation-corresponding surface 112a.
  • the bit body part protrusion side surface 112b is formed in a curved shape that is a part of the cylindrical surface so that the bit body part protrusion part 112 forms a planar shape in a partial shape of an arc centered on the rotation center axis, and the wing bit 100:
  • the bit body portion protrusion portion 112 When the bit body portion axial tube-facing surface 112c is rotated at a predetermined angle and the bit body portion rotation-corresponding surface 112a contacts the inner diameter of the steel casing, the bit body portion protrusion portion 112
  • the excavation direction portion is chamfered so that the edge of the excavation direction side corresponds to the inner diameter of the shaft pipe portion of the steel casing so that the bit body portion 110 can be inserted into the shaft pipe portion.
  • the bit main body portion 112c chamfers the corners of the wing bits (100: 101, 102), and the carbide button 111 This is the surface where the installation angle of) is adjusted.
  • the edge of the shaft pipe-facing surface 112c of the bit body portion and the protruding portion side surface 112b of the bit body portion is less than the maximum value so as not to be caught on the shaft pipe portion 110. It is desirable to perform chamfering.
  • the wing bit (100: 101, 102) of the present invention as shown in Figure 6, the first wing bit including a central carbide button (111a) located closest to the rotation axis of the bit housing body (200) 101), and a second wing bit 102 formed in pairs with the first wing bit and accommodated in the bit body receiving space and the bit combining unit receiving space together with the first wing bit, and the first wing bit 101 ), one side of the second wing bit 102 protrudes to the outside of the steel casing in the opposite direction of the first bit body portion protruding portion formed to protrude outward of the steel casing. do.
  • the first wing bit 101 is a wing bit including a central carbide button 111a. Therefore, when the wing bits 100: 101, 102 are composed of the first wing bit 101 and the second wing bit 102, the first wing bit 101 and the second wing bit 102 are as described above. Is, the width of the first wing bit 101 is wider than the second wing bit 102, and a part of the first wing bit 101 is located on the rotation axis of the bit housing body 200, and the second wing bit ( 102) will be formed in an asymmetrical shape, not located on the axis of rotation.
  • the central carbide button 111a is a carbide button that excavates the center of the excavation surface when the boring bit excavates. Since the carbide button of the perforated bit is preferably formed in a single shape, the central carbide button 111a is preferably formed singly and independently on the upper surface of the bit body of the wing bit.
  • the central carbide button (111a) so that a point on the circumference of the central carbide button (111a) is located on the rotation axis of the bit housing body (200), that is, the center point of the central carbide button (111a) is the bit housing body ( It is not located on the rotation axis of 200), it is preferably located on the rotation axis of the bit housing body 200, or located within 1.5 to 2 times the diameter of the central carbide button.
  • the central point of the central carbide button 111a does not overlap with the rotation axis of the bit housing body 200, when the central carbide button 111a excavates the center of the excavation surface, the center of the central carbide button 111a is This is because if the bit housing body 200 is positioned on the rotational axis of the bit housing body 200, the effect of excavation rarely occurs.
  • the center point of the central carbide button 111a is preferably formed to be spaced apart from the rotation axis of the bit housing body 200 by a predetermined distance.
  • the central carbide button 111a is too spaced apart from the rotation axis, and the surface on which the central carbide button 111a is located is located outside the rotation axis, a blank of excavation occurs in the center of the excavation surface.
  • the optimal position of the central carbide button 111a to solve this is the distance within 1.5 to 2 times the diameter of the central carbide button 111a from the rotation axis of the bit housing body 200 at the center point of the central carbide button 204 Is located in.
  • the bottom surface of the bit coupling portion 120 has a first bit coupling portion bottom surface 120a in contact with the bottom surface of the bit coupling portion accommodation space, and the first bit coupling portion. It includes a second bit combining buzzer surface 120b that makes an angular difference with respect to the bottom surface 120a by a predetermined angle and continues with the first bit combining buzzer surface.
  • bit coupling portion 120 faces the outer surface 120c of the bit coupling portion formed continuously with the bottom surface 120a of the first bit coupling portion, and the outer surface 120c of the bit coupling portion, and It includes a bit coupling portion inner side (120d) that is in contact with the bottom surface of the bit body portion and the stepped surface 261 of the receiving space of the bit body portion, and formed as a stepped surface of two steps continuous with the second bit coupling buzzer bottom surface (120b).
  • the lower stepped surface of the outer side of the bit coupling part 120c and the inner side of the bit coupling part 120d is formed in a parallel state with an angle difference by a certain angle, so that the outer side of the bit coupling part 120c is The side of the bit coupling part receiving space located in one direction of the main body is in contact, and when rotating, the inner side of the bit coupling part 120d is in contact with the side of the bit coupling part receiving space located in the other direction of the bit body part 110. do.
  • the angle difference between the first bit coupling buzzer surface 120aa and the second bit coupling buzzer surface 120b, and the angle generated when the outer side surface 120c of the bit coupling portion and the inner side surface 120d of the bit coupling portion are parallel
  • the difference is preferably the same as the angle at which the wing bits 100 (101, 102) are rotated.
  • the wing bits 100 when the wing bits (100: 101, 102) are rotated and collected, the second bit coupling portion bottom surface (120b) and the bit coupling portion inner surface (120d) are By coming into contact with the side, the wing bits 100 (101, 102) also serve to support the rotated state.
  • the diameter of the hinge pin is smaller than the diameter of the first hinge hole 121 and the diameter of the second hinge hole 230 It is desirable.
  • the wing bits 100: 101, 102 are rotated to be affected by a strong external force when excavating.
  • Bits (100: 101, 102) are the bottom surface of the bit body receiving space and the side wall of the bit body receiving space, the bottom surface of the bit combining unit receiving space and the side wall in which the hinge hole of the bit combining unit receiving space is formed, and the bit combining unit receiving space It is supported by the front wall of the hinge pin and the first hinge hole 121 and the second hinge hole 230 to prevent a strong external force from being transmitted.
  • the hinge pin and the first hinge hole 121 and the second hinge hole 230 are smaller structures than the surface forming the bit body receiving space and the surface forming the bit coupling part receiving space, so they are deformed or destroyed by strong external force. It is more likely to be.
  • the diameter of the second hinge hole 230 is smaller than the diameter of the first hinge hole 121. This is for always spaced apart the outer diameter of the hinge pin from the inner diameter of the first hinge hole 121 by a predetermined interval. That is, at both ends of the hinge pin, the second hinge hole 230, which is smaller than the first hinge hole 121, fixes the position of the hinge pin with respect to the central axis of the hinge pin, so that the hinge pin is always the first hinge hole 121 It is possible to be spaced a certain distance from all sides of the inner diameter.
  • the diameter of the hinge pin is formed smaller than the diameter of the second hinge hole 230
  • the difference between the diameter of the hinge pin and the diameter of the second hinge hole 230 is the difference between the hinge pin and the second hinge hole 230 It is preferably formed with assembly tolerances. That is, the difference between the diameter of the hinge pin and the diameter of the second hinge hole 230 is preferably maintained to a minimum.
  • the innermost edge (wing bit coupling portion) of the wing beat coupling portion 120 with the second hinge hole 230 as the center axis is preferably formed larger than the distance to the outermost edge (the side opposite to the innermost edge) of the wing bit coupling part 120.
  • the present invention further includes a hinge pin fixing means provided at an end of the hinge pin to prevent the hinge pin from being separated.
  • the side of the hinge pin does not protrude to the outside of the bit housing body, and more preferably, it is preferably located on the same surface as the outer surface of the bit housing body. It is preferable that the hinge pin fixing means also does not protrude to the outside of the bit housing body. The reason why it is preferable that the hinge pin and the hinge pin fixing means do not protrude outside the bit housing body is to prevent damage or damage to the hinge pin or the hinge pin fixing means by colliding with the hinge pin or the hinge pin fixing means. .
  • the hinge pin fixing means includes a hinge pin groove formed in an annular shape on one side of the outer circumferential surface of the hinge pin, a snap ring insertable into the hinge pin groove (S), and the outer peripheral portion of the second hinge hole 230 is formed in an expanded form. It may include a fixing groove for receiving.
  • the hinge pin fixing means may be provided on both sides of the hinge pin to fix the hinge pin, and when the hinge pin fixing means is installed only on one side of the hinge pin, the hinge pin cannot be inserted or protruded on the other side of the hinge pin.
  • Other means or members of preventing may be added.
  • the snap ring is caught in the hinge pin groove and the fixing groove at the same time to prevent the hinge pin from disengaging, and the hinge pin does not protrude to the outer surface of the bit housing body 200, and the snap ring is located inside the fixing groove. It does not protrude to the outer surface of the body.
  • the fixing groove may be omitted, and in this case, the side surfaces of the hinge pin and the hinge pin groove and the snap ring may protrude to the outside of the bit housing body.
  • the snap ring may further include an exterior control unit capable of expanding or reducing the snap ring at an end of the opening portion where the ring is opened for separation of the snap ring, and the fixing groove operates the exterior control unit from the outside of the bit housing body 200. It may further include an exterior manipulator for doing. Since the exterior manipulator is installed on one side of the fixing groove, it is preferable to be installed on the side opposite to the excavation.
  • the external control unit also serves to prevent the snap ring from rotating inside by external force. If the external control unit of the snap ring is located on the side of the excavation direction, there is a possibility that the snap ring rotates in the opposite direction due to external force. Because it becomes. Therefore, it is more preferable to provide an exterior manipulation hole for fixing the position of the exterior manipulation portion of the snap ring on the side opposite to the excavation so that the exterior manipulation portion of the snap ring can be installed and fixed on the side opposite to the excavation.
  • a fixing head attachable to one side of the hinge pin with a plate having a larger area than the diameter of the hinge pin, a fixing bolt fixing the fixing head to one side of the hinge pin, and a fixing head It may be configured to include a fixed head groove for accommodating the fixed head inside the bit housing body so as not to protrude to the outside of the bit housing.
  • a hinge pin fixing means may be installed on both sides of the hinge pin to fix the hinge pin. Even in this case, when the hinge pin fixing means is installed only on one side of the hinge pin, another means for preventing insertion or protrusion of the hinge pin may be added to the other side of the hinge pin.
  • At least two fixing bolts are installed to limit rotation between the hinge pin and the fixing head.
  • the fixed head and the fixed head groove may be formed in a circular shape, but it is preferable that the fixed head and the fixed head groove are formed in a shape other than a circular shape to limit the rotation of the hinge pin with respect to the bit housing body 200. This is because if the hinge pin can be freely rotated, there is a risk of wear or destruction of the hinge pin.
  • This fixed head is fixed to one side of the hinge pin by a fixing bolt to prevent the hinge pin from being separated, and the fixed head is accommodated in the fixed head groove and does not protrude to the outer surface of the bit housing body 200.
  • the fixed head groove may be omitted.
  • the fixed head and the fixed bolt may protrude to the outside of the bit housing body 200.
  • the hinge pin fixing means As another embodiment of the hinge pin fixing means, a fixing pin hole passing through the hinge pin in the transverse direction at one end of the hinge pin, and a fixing pin installed passing through the fixing pin hole but protruding to both sides of the fixing pin hole. I can. At this time, the hinge pin fixing means may be installed on both sides of the hinge pin to fix the hinge pin. Even in this case, when the hinge pin fixing means is installed only on one side of the hinge pin, another means for preventing insertion or protrusion of the hinge pin may be added to the other side of the hinge pin.
  • the fixing pin is installed through the fixing pin hole, but both ends of the fixing pin protrude to the outside of the fixing pin hole to prevent separation of the hinge pin.
  • the fixing pin may be used in the form of a spring pin, a split pin, or an R-shaped pin.
  • the hinge pin fixing means of another embodiment may further include a fixing pin insertion groove for accommodating both ends of the fixing pin protruding to both sides of the fixing pin hole into the inside of the bit housing body.
  • the fixing pin insertion groove is for not protruding the hinge pin and the hinge pin fixing means to the outside of the bit housing body 200.
  • a fixing pin insertion groove for accommodating both ends of the fixing pin inside the bit housing is further included, both ends of the protruding fixing pin are received in the fixing pin insertion groove and do not protrude to the outer surface of the bit housing body 200. Also, the side surface of the hinge pin does not protrude to the outside of the bit housing body 200.
  • the fixing pin insertion groove is preferably formed in a limited area in a limited area so as to restrict rotation of the fixing pin and the hinge pin about the rotation axis of the hinge pin.
  • the fixing pin insertion groove is formed in an annular or fan shape around the second hinge hole 230, the hinge pin can be freely rotated, thereby causing abrasion or destruction of the hinge pin or the fixing pin.
  • hinge pin fixing means are not limited thereto, and of course, they may be formed in other shapes or forms.
  • the recovery-type perforation bit according to the present invention can easily recover the perforation bit used for ground perforation through the inside of the steel casing, and has durability while minimizing parts, and maintains a solid fixing force.
  • the present invention is excellent in manufacturing and has the advantage of being able to easily discharge slime generated by crushing the ground or rock mass to the outside.
  • the present invention can be used in the field of construction and civil engineering and construction in which the ground is drilled using a ground excavator.

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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

La présente invention concerne un trépan de forage de type à récupération apte à facilement récupérer, à travers l'intérieur d'un tubage en acier, un trépan de forage utilisé pour le forage du sol, et offrant une structure de forage plus effective et efficace, et pouvant garantir une excellente aptitude au façonnage.
PCT/KR2020/003547 2019-03-15 2020-03-13 Trépan de forage de type à récupération WO2020189981A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2019-0029870 2019-03-15
KR1020190029870A KR102233462B1 (ko) 2019-03-15 2019-03-15 회수형 천공비트

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WO2020189981A1 true WO2020189981A1 (fr) 2020-09-24

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PCT/KR2020/003547 WO2020189981A1 (fr) 2019-03-15 2020-03-13 Trépan de forage de type à récupération

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KR (1) KR102233462B1 (fr)
WO (1) WO2020189981A1 (fr)

Cited By (1)

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WO2023214118A1 (fr) * 2022-05-03 2023-11-09 Mincon Nordic Oy Trépan et procédé de forage de trou pour tuyau à installer dans le sol

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US20110240373A1 (en) * 2010-04-01 2011-10-06 Center Rock, Inc. Down-the-hole drill hammer having an extendable drill bit assembly
KR101132704B1 (ko) * 2011-07-11 2012-04-02 (주)세종이엔씨 암반에서 확공이 가능한 굴착 비트 구조
KR20170044427A (ko) * 2015-10-15 2017-04-25 정순용 회수형 해머비트
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KR20080103666A (ko) * 2007-05-25 2008-11-28 이광익 해머비트
US20110240373A1 (en) * 2010-04-01 2011-10-06 Center Rock, Inc. Down-the-hole drill hammer having an extendable drill bit assembly
KR101132704B1 (ko) * 2011-07-11 2012-04-02 (주)세종이엔씨 암반에서 확공이 가능한 굴착 비트 구조
KR20170044427A (ko) * 2015-10-15 2017-04-25 정순용 회수형 해머비트
KR101961701B1 (ko) * 2018-01-23 2019-07-17 (주)나다건설 회수형 천공비트

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Publication number Priority date Publication date Assignee Title
WO2023214118A1 (fr) * 2022-05-03 2023-11-09 Mincon Nordic Oy Trépan et procédé de forage de trou pour tuyau à installer dans le sol

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KR20200109962A (ko) 2020-09-23

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