WO2017116001A1

WO2017116001A1 - Head-enhanced drill bit

Info

Publication number: WO2017116001A1
Application number: PCT/KR2016/012989
Authority: WO
Inventors: 김귀팔
Original assignee: 동림산업 주식회사
Priority date: 2015-12-29
Filing date: 2016-11-11
Publication date: 2017-07-06

Abstract

The present invention relates to a head-enhanced drill bit for improving durability by enhancing a head, and can comprise: a bit body having a tip excavating surface formed on a front end thereof; and a forward and backward moving body assembled with the bit body so as to be movable forward and backward on the basis of the bit body, capable of forming a sufficient folding space in which a wing bit provided on one side thereof can be folded in a backward state, and pressurizing the wing bit such that the wing bit is unfolded in a forward state so as to be restricted without being folded.

Description

Head Reinforced Drill Bits

TECHNICAL FIELD The present invention relates to a head reinforced drill bit, and more particularly, to a head reinforced drill bit that can strengthen the head to improve durability.

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.

However, this method has 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 matters in the soft soil ground in which the drilling hole is not naturally maintained because it proceeds to insert the steel pipe after the drilling.

In order to solve the above problems, conventionally, as disclosed in the Republic of Korea Patent Publication No. 100919628, a technology has been developed that can facilitate the installation of steel pipes by using a wing bit that can be folded.

However, such a conventional drill bit has a problem that the drill bit can not be firmly fixed to the wing bit structurally, such as the wing bit is easily damaged by the enormous impact and load applied to the wing bit.

The present invention is to improve such a conventional problem, as well as the forward and backward movable body using the head portion having a neck and shaft portion can selectively fold the wing bit while moving backwards and forwards, as well as the contact area when restraining the wing bit It is an object of the present invention to provide a head-reinforced drill bit that is wider to enable tight restraint of the wing bit. However, these problems are exemplary, and the scope of the present invention is not limited thereby.

Head reinforcement drill bit according to the idea of the present invention for solving the above problems, the tip body is formed with a tip drilling surface; And it is assembled with the bit body to enable the forward and backward on the basis of the bit body, it can form a sufficient folding space for the wing bit is installed on one side in the reverse state can be folded, the wing bit in the forward state is unfolded It may include; forward and backward movable body for pressing the wing bit to be restrained without being folded.

In addition, according to the present invention, the bit body, the head portion that the tip drilling surface is formed at the tip; A shaft portion formed at a rear end of the head portion, the shaft portion having a first width; And a neck portion formed in the middle of the shaft portion, the neck portion having a second width smaller than the first width, wherein the forward and backward movable body has a shaft accommodating groove capable of receiving the shaft portion on a front surface thereof. A movable block provided with a release preventing pin installed in contact with the neck across the shaft accommodating groove so that the shaft part accommodated in the shaft accommodating groove is not separated; And a wing bit inserted into a wing bit receiving groove formed at one side of the shaft accommodating groove, and which may be rotated based on the shaft protrusion inserted into the shaft groove.

Further, according to the present invention, a football pin may be installed in the shaft groove so that the shaft projection of the wing bit inserted in the shaft groove is not separated.

According to the present invention, a key protrusion is formed in the bit body so that the forward and backward movable body rotates the bit body when the forward and backward movable body moves forward with respect to the bit body, and the key groove is formed in the forward and backward movable body. This can be formed.

According to some embodiments of the present invention made as described above, it is possible to securely restrain the wing bit by widening the contact area when restraining the wing bit, thereby increasing the strength and durability of the component, structurally the wing bit It is possible to prevent the departure and significantly improve the durability, and to have the effect of facilitating the repair and replacement of the wing bit. Of course, the scope of the present invention is not limited by these effects.

1 is an external perspective view showing a head reinforced drill bit in accordance with some embodiments of the present invention.

FIG. 2 is an exploded perspective view of parts showing the head reinforcement drill bit of FIG. 1. FIG.

3 is a cross-sectional view showing a forward state of the movable body of the head-reinforced drill bit of FIG. 1.

It is sectional drawing which shows the reverse state of the back and front movable body of the head reinforced drill bit of FIG.

It is sectional drawing which shows the forward state of the forward and backward movable body of the head reinforced drill bit of FIG.

It is sectional drawing which shows the reverse state of the back and forth movable body of the head reinforced drill bit of FIG.

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" specifies the presence of the mentioned shapes, numbers, steps, actions, members, elements and / or groups of these. It is not intended to exclude the presence or 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 an external perspective view illustrating a head reinforced drill bit 100 in accordance with some embodiments of the present invention. 2 is an exploded perspective view of parts showing the head reinforcement drill bit 100 of FIG. 1.

First, as shown in FIGS. 1 and 2, the head-reinforced drill bit 100 according to some embodiments of the present invention may largely include a bit body 10 and a forward and backward movable body 20. have.

For example, as illustrated in FIGS. 1 and 2, the bit body 10 may be a kind of metal blocks formed of a plurality of components.

More specifically, for example, as shown in FIGS. 1 and 2, the bit body 10 may include a head portion 11, a shaft portion 13, and a neck portion 12.

Here, the head portion 11 is that the tip drilling surface (11a) is formed at the tip, the tip drilling surface (11a) may be provided with hemispherical carbide tips to facilitate the drilling.

In addition, although not shown in detail, the head portion 11 may be formed with various working fluid inlet holes or working fluid discharge grooves.

Therefore, during excavation, the working fluid such as air or water is injected into the working fluid inlet hole to reduce the blowout or impact, and the excavated foreign substances 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.

For example, as shown in FIG. 2, the shaft portion 13 is formed in a shape integral with the head portion 11, and may be a kind of a rotating shaft formed at a rear end of the head portion 11. .

Here, as shown in FIG. 2, the shaft portion 13 may have a first width W1 to be accommodated in the shaft accommodating groove H1 of the forward and backward movable body 20.

In addition, for example, as shown in Figure 2, the neck portion 12 is formed in a shape integral with the shaft portion 13 in the middle of the shaft portion 13, the separation prevention pin 23 to be described later is It may be a part that can be in contact with the separation prevention pin 23 to form a space to move. More specifically, for example, the neck 12 may have a second width W2 smaller than the first width W1.

In addition, for example, as shown in FIGS. 1 and 2, the forward and backward movable body 20 is assembled with the bit body 10 to enable forward and backward movement with respect to the bit body 10, and is in a reverse state. In the wing bit 22 is installed on one side can form a sufficient folding space to be folded, it can press the wing bit so that the wing bit 22 can be restrained without being folded to expand in the forward state It may be a kind of metal block.

More specifically, for example, as shown in FIGS. 1 and 2, the forward and backward movable body 20 may include a movable block 21 and the wing bit 22.

More specifically, for example, the movable block 21 has a shaft accommodating groove H1 capable of accommodating the shaft portion 13 on the front surface thereof, and the shaft portion 13 accommodated in the shaft accommodating groove H1. It may be a kind of cylinder-type metal block in which the separation prevention pin 23 is installed to be in contact with the neck 12 across the shaft receiving groove (H1) so as not to be separated.

Therefore, when the shaft portion 13 is inserted into the shaft accommodating groove H1 in a state where the separation preventing pin 23 is separated, and then the separation preventing pin 23 is assembled to the movable block 21, The shaft portion 13 is caught by the release preventing pin 23 and is not separated from the movable block 21, and the movable block 21 refers to the shaft portion 13 by the length of the neck portion 12. Can be advanced or reversed.

In addition, as shown in Figure 1 and 2, the wing bit 22 is inserted into the wing bit receiving groove (H2) formed on one side of the shaft receiving groove (H1), inserted into the shaft groove (H3) It may be a kind of metal block that can be rotated based on the accumulator 22a.

Here, the shaft groove (H3) may be rounded in the end shape in a shape corresponding to the shaft projection (22a) to guide the shaft projection (22a) of the wing bit (22).

More specifically, for example, as shown in FIG. 2, the wing bits 22 are formed on the both sides of the cylindrical protrusions 22a each having a cylindrical shape, and the wing bits 22 are rotated and excavated. Wing bit excavation surface to the front in the state unfolded 90 degrees based on the traveling direction is formed, a carbide tip may be installed on the wing bit excavation surface.

In addition, as shown in FIG. 2, the football pin 24 may be installed in the shaft groove H3 so that the shaft protrusion 22a of the wing bit 22 inserted into the shaft groove H3 is not separated. have.

Therefore, the shaft projection 22a of the wing bit 22 is inserted into the shaft groove H3, and then the soccer pin 24 is inserted into the shaft groove H3 to the shaft projection of the wing bit 22. 22a may be firmly assembled without being separated from the shaft groove H3, and the wing bit 22 may be folded and expanded while being rotated with respect to the shaft protrusion 22a.

Therefore, since the wing bit 22 and the shaft protrusion 22a are a single unitary unitary component, a collision between the components may be prevented at the source, and thus the wing bit 22 and the shaft protrusion 22a may be firmly supported even in the enormous external force and impact generated during the excavation process. Since the shaft protrusion 22a of 22) is an internal type that is inserted into the shaft groove H3 without being exposed to the outside of the bit body 10, it prevents the intrusion of various foreign substances to prevent breakdown or malfunction and greatly improves durability. In addition, since the wing bit 22 can be easily repaired or replaced by removing the head portion 11, the manageability of the device can be greatly improved.

Therefore, as shown in FIGS. 1 and 2, the forward and backward movable body 20 is in contact with the wing bit 22 at its maximum so that the wing bit 22 can be rotated and unfolded at 90 degrees based on the traveling direction. Can support by area.

Therefore, by widening the contact area of the wing bit 22 to distribute the force in the event of external force or various shocks can be more firmly inclined support, a large area so that the steel pipe can be inserted enough when excavating in a state inclined 90 degrees Can be excavated

That is, the wing bit 22 is installed so as to be supported at 90 degrees based on the advancing direction, which is resistant to external force and impact, and is substantially similar to increasing the thickness of the wing bit 22 substantially to increase durability. Can be improved.

At this time, the working fluid such as air or water is injected into the working fluid inlet hole during excavation, and the excavated foreign matters can be discharged along the working fluid discharge groove.

For example, as illustrated in FIGS. 1 and 2, when the forward and backward movable body 20 moves forward with respect to the bit body 10, the forward and backward movable body 20 is the bit body 10. Key protrusion (KT) is formed in the bit body 10 so as to rotate, and the key groove (KH) may be formed in the forward and backward movable body (20).

Therefore, when the forward and backward movable body 20 moves forward with respect to the bit body 10, the key protrusion KT is coupled with the key groove KH to rotate the bit body 10 without waste. have.

3 is a cross-sectional view showing a forward state of the forward and backward movable body 20 of the head reinforced drill bit 100 of FIG. 1, and FIG. 4 is a forward and backward movable body of the head reinforced drill bit 100 of FIG. 3 ( 20 is a cross-sectional view showing a reverse state, FIG. 5 is a cross-sectional view showing a forward state of the forward and backward movable body 20 of the head reinforced drill bit 100 of FIG. 1, and FIG. 6 is a head reinforced drill of FIG. 5. It is sectional drawing which shows the reverse state of the forward and backward movable body 20 of the bit 100. FIG.

As shown in Figures 3 to 6, step by step description of the operation of the head-reinforced drill bit 100 according to some embodiments of the present invention, first, as shown in Figures 3 and 5, In the advancing state of the forward and backward movable body 20, the forward and backward movable body 20 maintains the position advanced by the release preventing pin 23 in contact with the front end of the neck 12 of FIG. 3. 5, the wing bit 22 of FIG. 5 is extended to 90 degrees and can be excavated while carrying the steel pipe in an expanded state. At this time, the forward and backward movable body 20 is in direct contact with the wing bit 22 can support the wing bit 22 in a large area can greatly improve the durability of the part.

Subsequently, as shown in FIGS. 4 and 6, in the reverse state of the forward and backward movable body 20, the release movable body 20 contacts the rear end of the neck 12 of FIG. 4. While maintaining the reverse position by the prevention pin 23, the wing bit 22 of Figure 6 can be easily folded out to the outside leaving the steel pipe in a folded state collapsed.

Therefore, the forward and backward movable bodies 20 using the head 11 can be selectively folded to the wing bit 22 while reversing and advancing, as well as contacting when restraining the wing bit 22. It is possible to constrain the wing bit 22 firmly by widening the area, thereby increasing the strength and durability of the component, structurally preventing the wing bit 22 from being separated, and significantly improving the durability. The wing bit 22 can be easily repaired and replaced.

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.

According to some embodiments of the present invention made as described above, it is possible to securely restrain the wing bit by widening the contact area when restraining the wing bit, thereby increasing the strength and durability of the component, structurally the wing bit It is possible to prevent the falling off and improve the durability dramatically, and reduce the drilling cost of the ground by facilitating the repair and replacement of the wing bit.

Claims

A bit body having a tip drilling surface formed at its tip; And

It is assembled with the bit body to enable the forward and backward on the basis of the bit body, it can form a sufficient folding space for the wing bit is installed on one side in the reverse state can be folded, the wing bit in the forward state is folded A forward and backward movable body which presses the wing bit to be restrained without being;

Including, the head reinforcement drill bit.
The method of claim 1,

The bit body,

A head portion formed at the tip of the tip drilling surface;

A shaft portion formed at a rear end of the head portion, the shaft portion having a first width; And

A neck portion formed in the middle of the shaft portion and having a second width smaller than the first width;

The forward and backward moving body,

A movable block having a shaft accommodating groove capable of accommodating the shaft portion at a front surface thereof, and a release preventing pin installed across the shaft accommodating groove so as to be in contact with the neck so that the shaft accommodating the shaft accommodating groove is not separated from the movable block; And

The wing bit is inserted into the wing bit receiving groove formed on one side of the shaft receiving groove, the wing bit can be rotated based on the shaft projection inserted into the shaft groove;

Including, the head reinforcement drill bit.
The method of claim 2,

The head reinforcing drill bit is installed in the shaft groove so that the shaft projection of the wing bit inserted into the shaft groove is not separated.
The method of claim 1,

The head-reinforced type is provided with a key protrusion formed on the bit body so that the forward and backward movable body rotates the bit body when the forward and backward movable body moves forward with respect to the bit body. Drill bit.