WO2018088770A1

WO2018088770A1 - Excavation bit and excavation steel pipe

Info

Publication number: WO2018088770A1
Application number: PCT/KR2017/012522
Authority: WO
Inventors: 계진태; 김귀팔
Original assignee: (주)씨엔피텍; 동림산업 주식회사
Priority date: 2016-11-10
Filing date: 2017-11-07
Publication date: 2018-05-17

Abstract

The present invention relates to an excavation bit capable of facilitating the installation of a steel pipe, and to an excavation steel pipe. The excavation bit comprises: a bit body formed elongated in the longitudinal direction so as to be insertable into the excavation steel pipe having a pipe shape; a bit head part coupled to one surface of the bit body, and having an excavation surface formed on a tip of the bit head part and a wing bit accommodating groove formed on an outer circumferential surface of the bit head part; a wing bit formed elongated in the longitudinal direction and installed near the excavation surface of the bit head part such that the wing bit can be folded and unfolded; and a temporary catching device protruding from the bit body in the outer diameter direction and installed so as to catch onto a catching projection portion of the excavation steel pipe so that the excavation steel pipe progresses together with the bit body in the direction of progress of excavation while being inserted by the bit body, and only the bit body emerges externally while leaving the excavation steel pipe behind when the bit body moves backward in the direction opposite to the direction of progress of excavation.

Description

Drill Bits and Drilling Steel Pipes

The present invention relates to a drilling bit and a drilling steel pipe, and more particularly to a drilling bit and a drilling steel pipe that can facilitate the installation of the steel pipe.

In general, the steel pipe grouting method is an underground excavation auxiliary method that improves the order while reinforcing the ground. The steel pipe is installed on the ground, and the grout material is injected into the inside of the steel pipe, thereby integrating the steel pipe and the ground by the solidification of the ground by the injection material. It is characterized by increasing the shear strength of soil and rock, and it is very advantageous in terms of constructability and economical efficiency because injection is performed in steel pipes.

The steel pipe grouting method is widely used as a part of the tunnel reinforcing method in recognition of its effect.

In general, the steel pipe grouting method includes the steps of drilling the ground, inserting a steel pipe provided with a strainer (groove injection part) in the drilled hole, inserting a sealing material between the steel pipe and the hole, and installing a packer. While the cement is made.

Since the conventional excavation method proceeds by inserting the steel pipe after drilling, there is a problem in that it is difficult to insert the steel pipe due to the collapse of the drilling hole or the mixing of foreign substances in the soft soil ground in which the drilling hole is not naturally maintained.

The present invention is to solve the various problems including the above problems, the drilling steel pipe having a locking jaw portion formed in the inner diameter surface in the form of a pipe is inserted in the state caught in the temporary locking device of the drilling bit, the pressure The wing bit of the excavation bit by the unfolded state proceeds along the excavation bit and the excavation progress direction and finishes the excavation, and when the lifting bit is lifted, the wing bit is naturally folded by the load and the excavation steel pipe It is an object of the present invention to provide an excavation bit and an excavation steel pipe that allow only the excavation bit to be lifted to the outside while leaving it. However, these problems are exemplary, and the scope of the present invention is not limited thereby.

According to one aspect of the invention, an excavation bit is provided. The drilling bit, the bit body is formed long in the longitudinal direction to be inserted into the pipe-like drilling steel pipe; A bit head portion coupled to one surface of the bit body to form an excavation surface at a tip thereof, and a wing bit receiving groove formed at an outer diameter surface thereof; Wing bits are formed long in the longitudinal direction, the wing bit is installed to be expanded and folded in the vicinity of the excavation surface of the bit head portion; And the drilling steel pipe is inserted by the bit body to proceed along the drilling progress direction together with the bit body, and the drilling steel pipe is left while the bit body is retracted in the opposite direction to the drilling progress direction. It may include; a temporary locking device protruding in the outer diameter direction from the bit body so as to only exit the body to be caught to the locking jaw portion of the drilling steel pipe.

In the drilling bit, the temporary locking device may be a protrusion in which a plurality of conformal arrangements are disposed along the outer diameter surface of the bit body.

In the drilling bit, the protrusion, the protrusion body is formed to protrude in the circumferential direction from the outer diameter surface of the bit body; And a first body formed on one surface facing the locking jaw of the drilling steel pipe so that the bit body can reinforce the protrusion with respect to a load applied to the protrusion when the bit body travels along the drilling progress direction along with the drilling steel pipe. It may include a round portion.

In the excavation bit, the protrusion, the first round so that when the bit body is retracted in the opposite direction of the excavation progress direction, the protrusion can smoothly escape to the outside without being caught by the inner diameter surface of the excavation steel pipe It may further include a second round portion formed on the opposite side formed side.

In the drilling bit, the protrusions may be first protrusions, second protrusions, third protrusions, and fourth protrusions which are formed to protrude in the circumferential direction from the outer diameter surface of the bit body, respectively, and are disposed at an angle of 90 degrees.

According to one aspect of the invention, there is provided a steel pipe for drilling. The excavation steel pipe, the steel pipe body is formed long in the longitudinal direction in the form of a circular pipe as a whole; And a locking jaw formed to protrude in the direction of the central axis of the steel pipe body from the inner diameter surface of the steel pipe body so that the steel pipe body may be caught in the temporary locking device of the drilling bit so that the steel pipe body may move along the drilling progress direction together with the drilling bit. It can include;

In the drilling steel pipe, the temporary locking device is a plurality of protrusions are arranged at equal intervals along the outer diameter surface of the bit body of the drilling bit, the locking jaw portion, at equal intervals along the inner diameter surface of the steel pipe body. A plurality may be disposed, and the gap of the locking step may be smaller than the gap of the protrusion.

In the drilling steel pipe, the temporary locking device is a plurality of protrusions are arranged at equal intervals along the outer diameter surface of the bit body of the drilling bit, the locking jaw has an inner diameter smaller than the inner diameter of the steel pipe body. It may be formed to protrude in a ring shape along the inner diameter surface of the steel pipe body.

According to one embodiment of the present invention made as described above, the locking jaw portion is formed on the inner diameter surface of the pipe-like drilling steel pipe, the temporary locking device is formed on the outer diameter surface of the bit body of the drilling bit, the locking jaw portion By the contact of the temporary locking device and the drilling bit and the drilling steel pipe can be excavated together.

In addition, the wing bit of the excavation bit is unfolded by the excavation pressure, and proceeds along the excavation bit and the excavation progress direction, and then completes the excavation. When the excavation bit is lifted, the wing bit is naturally folded by the load. While leaving the excavation steel pipe can be pulled up only the excavation bit to the outside, it is possible to implement the excavation bit and excavation steel pipe having the effect of improving the efficiency and productivity of the drilling operation. Of course, the scope of the present invention is not limited by these effects.

1 is a perspective view showing a drilling bit according to an embodiment of the present invention.

2 is a cross-sectional view illustrating the excavation bit of FIG. 1.

Figure 3 is a perspective view showing a state in which the wing bit of the drilling bit of Figure 1 folded.

4 is a cross-sectional view showing a state in which the drilling bit of Figure 1 is inserted into the drilling steel pipe.

5 is a perspective view showing an excavation steel pipe according to an embodiment of the present invention.

Figure 6 is a perspective view showing a steel pipe for drilling in accordance with another embodiment of the present invention.

7 is a perspective view showing an excavation steel pipe according to another embodiment of the present invention.

8 is a perspective view showing an excavation steel pipe according to another embodiment of the present invention.

Hereinafter, various exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art, and the following examples can be modified in various other forms, and the scope of the present invention is It is not limited to an Example. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In addition, the thickness or size of each layer in the drawings is exaggerated for convenience and clarity of description.

Throughout the specification, when referring to one component, such as a film, region or substrate, being positioned on, "connected", "stacked" or "coupled" to another component, said one configuration It may be interpreted that an element may be in direct contact with, or “coupled to”, “stacked” or “coupled” another component, or that there may be further components interposed therebetween. On the other hand, when one component is said to be located on another component "directly on", "directly connected", or "directly coupled", it is interpreted that there are no other components intervening therebetween. do. Like numbers refer to like elements. As used herein, the term "and / or" includes any and all combinations of one or more of the listed items.

Although the terms first, second, etc. are used herein to describe various members, parts, regions, layers, and / or parts, these members, parts, regions, layers, and / or parts are defined by these terms. It is obvious that not. These terms are only used to distinguish one member, part, region, layer or portion from another region, layer or portion. Thus, the first member, part, region, layer or portion, which will be discussed below, may refer to the second member, component, region, layer or portion without departing from the teachings of the present invention.

Also, relative terms such as "top" or "above" and "bottom" or "bottom" may be used herein to describe the relationship of certain elements to other elements as illustrated in the figures. It may be understood that relative terms are intended to include other directions of the device in addition to the direction depicted in the figures. For example, if the device is turned over in the figures, elements depicted as present on the face of the top of the other elements are oriented on the face of the bottom of the other elements. Thus, the exemplary term "top" may include both "bottom" and "top" directions depending on the particular direction of the figure. If the device faces in the other direction (rotated 90 degrees relative to the other direction), the relative descriptions used herein can be interpreted accordingly.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. Also, as used herein, "comprise" and / or "comprising" refers to the presence of the mentioned shapes, numbers, steps, actions, members, elements and / or groups. It is not intended to exclude the presence or the addition of one or more other shapes, numbers, acts, members, elements and / or groups.

Embodiments of the present invention will now be described with reference to the drawings, which schematically illustrate ideal embodiments of the present invention. In the figures, for example, variations in the shape shown may be expected, depending on manufacturing techniques and / or tolerances. Accordingly, embodiments of the inventive concept should not be construed as limited to the specific shapes of the regions shown herein, but should include, for example, changes in shape resulting from manufacturing.

1 is a perspective view showing a drilling bit 100 according to an embodiment of the present invention. 2 is a cross-sectional view illustrating the excavation bit 100 of FIG. 1, FIG. 3 is a perspective view illustrating a state in which the wing bit 130 of the excavation bit 100 of FIG. 1 is folded, and FIG. 4 is FIG. 1. Is a cross-sectional view showing a state in which the drilling bit 100 is inserted into the drilling steel pipe 200.

First, as shown in FIGS. 1 to 4, the drilling bit 100 according to the embodiments of the present invention includes a bit body 110, a bit head part 120, and a wing bit 130. And the temporary locking device 140 may be included.

As shown in Figures 1 to 4, the bit body 110 may be formed long in the longitudinal direction so that it can be inserted into the pipe-like drilling steel pipe 200.

More specifically, the bit body 110, a portion of the bit head portion 120 may be inserted into one side, the bit head portion 120 is free to rotate so that the bit head portion 120 can be relatively rotated Supporting, it may be a metal block in the shape of a cylinder.

In addition, as shown in Figures 1 to 4, the bit head portion 120 is coupled to one surface of the bit body 110, the excavation surface 121 is formed on the tip, the wing bit receiving groove ( 122) can be formed.

More specifically, the hemisphere cemented carbide tips may be installed on the excavation surface 121 of the tip of the bit body 110 to facilitate excavation.

In addition, the bit head 120 may be formed, for example, a working fluid inlet hole or a working fluid outlet groove. Therefore, during drilling, a working fluid such as air or water is introduced into the working fluid inlet hole to reduce friction or impact, and the excavated foreign matters can be easily discharged to the outside along the working fluid discharge groove. The number or shape of the working fluid inlet hole or the working fluid discharge groove may vary.

In addition, the wing bit receiving groove 122 may be formed in the outer diameter surface of the bit head portion 120, and may be a first receiving groove, a second receiving groove, and a third receiving groove that are conformally disposed at 120 degrees, respectively.

In addition, as shown in Figures 1 to 4, the wing bit 130 is formed long in the longitudinal direction, is installed in the vicinity of the excavation surface 121 of the bit head portion 120 so that it can be expanded and folded It may be three wing-shaped metal blocks.

Here, the number of wing bits 130 is not limited to three, and at least one or two, four, five, six, and the like may be installed. In addition, a wing bit excavation surface may be formed on the wing bit 130, and at least one cemented carbide tip may be installed on the wing bit excavation surface.

More specifically, the wing bit 130, when rotated in the clockwise direction based on the axial direction of the bit body 110, an inclined surface is formed in front of the wing bit body to facilitate excavation, one-way curved surface on one side of the tip When the bit body 110 is rotated in the counterclockwise direction, a rounded surface may be formed at the rear end thereof so that the bit body 110 may be folded in the axial direction of the bit body 110.

Therefore, the wing bit 130 can be drilled in the excavation hole that can be expanded from the bit head portion 120 to be inserted into the drilling steel pipe 200, and folded and coupled in the direction of the bit head portion 120 After the completion of the work can be exited to the outside of the drilling hole through the drilling steel pipe (200).

Therefore, the wing bit 130 is installed so that a total of three isometrically arranged along the outer circumferential surface of the bit body 110, so that the excavation steel pipe 200 can be sufficiently inserted when excavating in the unfolded state from the bit body 110 Large area can be excavated.

At this time, by installing the wing bit 130 to be inclined unfolding relative to the excavation progress direction, it is resistant to external forces and impact, and substantially similar to increasing the thickness of the wing bit 130 can significantly improve durability. In addition, the excavation of the working fluid of air or water into the working fluid input hole of the bit head 120, the excavated foreign matter can be discharged along the working fluid discharge groove.

Subsequently, after the completion of the excavation work, when the bit body 110 moves in the opposite direction of the excavation direction, the wing bit 130 is folded in the direction of the bit body 110 through the inner diameter surface of the excavation steel pipe 200 It can be easily pulled out.

In addition, as shown in Figures 1 to 4, the temporary locking device 140, the drilling steel pipe 200 is inserted by the bit body 110, along with the bit body 110 along the excavation progress direction When the bit body 110 is retracted in the opposite direction of the drilling progress direction, the drilling steel pipe 200 is left in the outer diameter direction from the bit body 110 so that only the bit body 110 can be released to the outside. The protrusion may be installed to be caught by the locking jaw portion 220 of the drilling steel pipe 200.

For example, the temporary locking device 140 may be a protrusion 141 having a plurality of isometrically disposed along the outer diameter surface of the bit body 110. In this case, each of the protrusions 141 may be a first protrusion, a second protrusion, a third protrusion, and a fourth protrusion that are formed to protrude in the circumferential direction from the outer diameter surface of the bit body 110 and are disposed at an angle of 90 degrees.

Here, the number of protrusions 141 is not necessarily limited to four, and at least one or two, three, five, six, and the like may be installed. In addition, it may be formed to be connected in a ring shape along the outer diameter surface of the bit body (110). In addition, any shape that may be caught by the locking jaw portion 220 of the excavation steel pipe 200 may be applied during the excavation operation.

In addition, the protruding portion 141 includes a protruding body 141a formed to protrude in the circumferential direction from the outer diameter surface of the bit body 110, and the bit body 110 along the excavation progressing direction along with the excavating steel pipe 200. The first round portion (R1) formed on one surface facing the locking jaw portion 220 of the drilling steel pipe 200 to reinforce the protrusion 141 against the load on the protrusion 141 during the progression and When the bit body 110 retreats in the opposite direction to the excavation progress direction, the first round part R1 is provided so that the protruding portion 141 can smoothly escape to the outside without being caught by the inner diameter surface of the excavating steel pipe 200. It may include a second round portion (R2) formed on the opposite surface formed.

More specifically, by forming the first round portion (R1) in the protrusion 141, to fully support the external force transmitted from the locking jaw portion 220 of the excavation steel pipe 200 during the excavation work, the excavation steel pipe 200 The excavation bit 100 may be supported to be excavated and inserted together.

Therefore, the first round portion R1, which is a reinforcing portion, is formed on the protrusion 141, which is resistant to external force and impact, and has an effect substantially similar to that of increasing the thickness of the protrusion 141, thereby significantly improving durability. You can.

In addition, the second round portion R2 is formed on the opposite surface on which the first round portion R1 of the protrusion 141 is formed, and after completion of the excavation work, the bit body 110 retreats in the opposite direction to the excavation progress direction. When the foreign material in the excavation steel pipe 200 due to the excavation work or deformation of the excavation steel pipe 200 occurs, the bit body 110 easily falls outward along the inner diameter surface of the excavating steel pipe 200. You can induce it to come out.

In addition, when the bit body 110 is retracted in the opposite direction of the excavation progress direction after completing the excavation work, foreign matter introduced into the excavation steel pipe 200 during the excavation work is a plurality of along the outer diameter surface of the bit body 110 It is possible to escape to the gap between the protrusions 141 isometric is disposed so that the bit body 110 can escape along the inner diameter surface of the drilling steel pipe 200 without being disturbed by the foreign matter.

Therefore, as shown in Figure 4, the drilling bit 100 according to an embodiment of the present invention, the locking jaw 220 is formed on the inner diameter surface of the pipe-like drilling steel pipe 200, for drilling Temporary locking device 140 is formed on the outer diameter surface of the bit body 110 of the bit 100, the drilling bit 100 and the drilling steel pipe by the contact of the locking jaw 220 and the temporary locking device 140 Excavation may proceed with the 200.

In addition, while the wing bit 130 of the drilling bit 100 is unfolded by the excavation pressure, the drilling bit 100 proceeds along the excavation bit 100 and the excavation progress direction, and completes the excavation, and lifts the excavation bit 100. When raised, the wing bit 130 can be naturally folded by the load and pull up only the drilling bit 100 to the outside leaving the drilling steel pipe 200, thereby greatly reducing the rock drilling time and excavation cost, It can have the effect of improving the efficiency and productivity.

5 is a perspective view showing a drilling steel pipe 200 according to an embodiment of the present invention, Figures 6 to 8 is a perspective view showing a drilling steel pipe (300, 400, 500) according to another embodiment of the present invention. .

As shown in Figure 5, the drilling steel pipe 200 according to an embodiment of the present invention, the steel pipe body 210 and the steel pipe body 210 is formed in the longitudinal direction in the form of a circular pipe as a whole for excavation In the direction of the central axis of the steel pipe body 210 from the inner diameter surface of the steel pipe body 210 to be caught in the temporary locking device 140 of the bit 100 to proceed along the excavation progress direction with the drilling bit 100 It may include a locking jaw 220 is formed to protrude.

In addition, as a relief, the temporary locking device 140 is a plurality of protrusions 141 are arranged at equal intervals along the outer diameter surface of the bit body 110 of the drilling bit 100, the locking jaw 220, A plurality may be disposed along the inner diameter surface of the steel pipe body 210 at equal intervals, and the interval of the locking jaw 220 may be smaller than the interval of the protrusion 141.

Here, the locking jaw portion 220 of the excavation steel pipe 200 may be formed by a mechanical processing using a press working or cutting processing or a manual processing method by an operator. Accordingly, the shape of the locking jaw 220 is not necessarily limited to FIG. 5, and the locking jaw portion 320 of the drilling steel pipe 300 shown in FIG. 6 or the drilling steel pipe 400 shown in FIG. A variety of shapes that can be caught in contact with the temporary locking device 140 of the drilling bit 100, such as the locking jaw 420 may be applied.

In addition, as shown in FIG. 8, the locking jaw portion 520 of the drilling steel pipe 500 has an inner diameter smaller than the inner diameter of the steel pipe body 510 and has a ring shape along the inner diameter surface of the steel pipe body 510. Is formed to protrude, it may further improve the strength of the locking jaw portion (520).

Thus, as shown in Figure 5 to 8, the locking projection 220 is formed on the inner diameter surface of the pipe-like drilling steel pipe 200, the outer diameter surface of the bit body 110 of the drilling bit 100 The temporary locking device 140 is formed in the excavation bit 100 and the excavating steel pipe 200 by the contact of the locking jaw 220 and the temporary locking device 140 may be carried out together. At this time, the interval between the locking jaw 220 of the excavation steel pipe 200 is formed smaller than the interval of the plurality of protrusions 141 of the temporary locking device 140, so that the locking jaw 220 and the temporary locking device 140 When contacting, the temporary locking device 140 may be prevented from escaping between the locking jaw portions 220.

Therefore, the locking jaw portion 220 is formed on the inner diameter surface of the pipe-like drilling steel pipe 200, and the temporary locking device 140 is formed on the outer diameter surface of the bit body 110 of the drilling bit 100, Excavation bit 100 and the excavation steel pipe 200 may be excavated together by the contact of the locking jaw 220 and the temporary locking device 140.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

In addition, the wing bit of the excavation bit is unfolded by the excavation pressure, and proceeds along the excavation bit and the excavation progress direction, and then completes the excavation. When the excavation bit is lifted, the wing bit is naturally folded by the load. While leaving the drilling steel pipe can be pulled out only the drilling bit to the outside, it is possible to reduce the drilling cost by improving the efficiency and productivity of the drilling operation.

Claims

Bit body formed long in the longitudinal direction to be inserted into the pipe-like drilling steel pipe;

A bit head portion coupled to one surface of the bit body to form an excavation surface at a tip thereof, and a wing bit receiving groove formed at an outer diameter surface thereof;

Wing bits are formed long in the longitudinal direction, the wing bit is installed to be expanded and folded in the vicinity of the excavation surface of the bit head portion; And

The drilling steel pipe is inserted by the bit body and proceeds along the drilling progress direction together with the bit body, and when the bit body retreats in a direction opposite to the drilling progress direction, the drilling steel pipe is left while the bit body is left. A temporary locking device protruding in an outer diameter direction from the bit body so as to only be pulled out to be caught by the locking jaw portion of the drilling steel pipe;

Containing, drilling bit.
The method of claim 1,

The temporary locking device,

Excavation bit, a plurality of protrusions are conformal disposed along the outer diameter surface of the bit body.
The method of claim 2,

The protrusion,

A protruding body formed to protrude in the circumferential direction from an outer diameter surface of the bit body; And

The first round is formed on one surface facing the locking jaw portion of the drilling steel pipe so that the bit body can reinforce the protrusion with respect to the load on the protrusion when traveling along the drilling progress direction along with the drilling steel pipe part;

Containing, drilling bit.
The method of claim 3, wherein

The protrusion,

A second round formed on an opposite surface on which the first round portion is formed so that the protrusion can be smoothly escaped to the outside without being caught by the inner diameter surface of the drilling steel pipe when the bit body is retracted in the direction opposite to the drilling progress direction part;

Further comprising, a drilling bit.
The method of claim 2,

The protrusion,

Drilling bits, each of which is formed to protrude in the circumferential direction from the outer diameter surface of the bit body, the first projection, the second projection, the third projection and the fourth projection that are conformally disposed at 90 degrees.
Steel pipe body which is formed in the longitudinal direction in the form of a circular pipe as a whole; And

A locking jaw formed to protrude in the direction of the central axis of the steel pipe body from the inner diameter surface of the steel pipe body so that the steel pipe body may be caught by the temporary locking device of the drilling bit and proceed along the drilling progress direction together with the drilling bit;

Including, excavation steel pipe.
The method of claim 6,

The temporary locking device is a plurality of protrusions are arranged at equal intervals along the outer diameter surface of the bit body of the drilling bit,

The locking jaw portion, a plurality of are arranged at equal intervals along the inner diameter surface of the steel pipe body,

Spacing of the locking jaw portion is formed smaller than the interval of the protrusion, drilling steel pipe.
The method of claim 6,

The temporary locking device is a plurality of protrusions are arranged at equal intervals along the outer diameter surface of the bit body of the drilling bit,

The locking jaw portion has an inner diameter smaller than the inner diameter of the steel pipe body and is formed to protrude in a ring shape along the inner diameter surface of the steel pipe body, drilling steel pipe.