KR200425452Y1 - Direct-boring bit apparatus - Google Patents

Abstract

The present invention relates to a direct drilling bit device, in particular, a direct drilling bit provided with a plurality of cutting tips is rotatably coupled to a hollow steel pipe to which the steel pipe is fixed, and the power transmission structure for transmitting power is a direct drilling bit. The structure is coupled to be detachably attached to the rear, it is characterized by saving the construction time, and improve the work efficiency through the coupling structure to be easily and precisely mounted and detached between the direct drilling bit and the power transmission structure.

Direct Drill Bits, Cylinders, Euros

Description

Direct Hole Bit Device {DIRECT-BORING BIT APPARATUS}

1 is a plan view showing a perforated bit device according to the prior art.

Figure 2 is a partial cross-sectional view showing a perforated bit device according to the present invention.

Figure 3 is a perspective view showing a direct drilling bit device according to the present invention.

Figure 4 is a partial cross-sectional view showing a steel pipe shoe of the perforated bit device according to the present invention.

5a and 5b is a front view and a cross-sectional view of the power transmission structure of the perforated bit device according to the present invention.

Figures 6a, 6b and 6c is a front view, a cross-sectional view, and a rear view of the perforated bit of the perforated bit device according to the present invention.

7a and 7b is a state diagram showing the operation of the perforated bit device according to the present invention.

8 is a cross-sectional view showing a perforated bit device according to a modification of the present invention.

9 is a perspective view showing a direct drilling bit device according to a modification of the present invention.

10a and 10b is a state diagram showing the operation of the perforated bit device according to a modification of the present invention.

<Code Description of Main Parts of Drawing>

100: steel pipe shoe 110: steel pipe

120: jam jaw 130: spring key

200: direct drill bit 210: seating portion

220: protrusion frame 230: cutting tip

240: guide channel 250: euro

300: power transmission structure 310: bit coupling portion

320: body portion 330: extension portion

400: load

The present invention relates to a direct punch bit device, and the power transmission structure is detachably coupled to the rear portion of the direct punch bit, and thus relates to a direct drill bit device that is easily excavated and improved work productivity.

Generally, many steel pipes are laid in the ground or rock to prevent leakage and stabilize soil. In order to bury the steel pipe, it is necessary to perform a drilling operation to form holes in the ground or rock, and the device used is a drilling device.

Hereinafter, a conventional drilling apparatus will be described with reference to the accompanying drawings.

1 shows a configuration of a conventional drilling apparatus.

As shown in FIG. 1, the outer sleeve 3 having a cylindrical shape forms the appearance of the drilling device 1. At this time, the components constituting the drilling apparatus 1 are installed in the outer sleeve 3.

That is, the outer sleeve 3 corresponding to the upper end of the drilling device 1 is equipped with a top sub 5 having an air supply passage 5 'formed therein, and the lower end of the top sub 5 It is inserted and installed inside the upper end of the outer sleeve (3). In addition, a valve body 7 is provided inside the outer sleeve 3 corresponding to a lower portion of the top sub 5, and an air flow path 7 ′ is formed in the valve body 7.

A check valve 9 is provided between the top sub 5 of the valve body 7. The check valve 9 is an air supply passage 5 ′ of the top sub 5 by a spring 9 ′. It is installed in close contact with the bottom to control the supply of air to the valve body (7) through the top sub (5).

An inner sleeve 11 is provided inside the outer sleeve 3 corresponding to the lower portion of the valve body 7. In this case, a piston 13 penetrating the inner sleeve 11 is installed in the inner sleeve 11, and an air flow passage 13 ′ is formed in the piston 13 so as to penetrate the inner sleeve 11. And, while being lifted by the air supplied through the check valve 9 to hit the bit 17 to be described later.

At this time, the flow path of air for lifting the piston 13 is also formed between the piston 13 and the inner sleeve 11, these flow paths are communicated or closed by the lifting of the piston 13, the piston ( 13) is configured to supply air in the lifting direction or in the opposite direction.

At the lower end of the outer sleeve 3, a drive sub 15 for guiding the lift of the bit 17 is installed. Here, the bit 17 is a portion that drills the ground to perform a puncture function, the discharge passage 17 'through which air is discharged is formed therein, a plurality of the surface to facilitate the excavation of the ground The button 17b protrudes.

In addition, a bit retaining ring 18 is provided inside the outer sleeve 3 in order to allow the bit 17 to enter and exit without falling out of the outer sleeve 3. The bit retaining ring 18 is located inside the outer sleeve 3 corresponding to the top of the drive sub 15, and has an inner diameter smaller than a portion of the top of the bit 17 so that the bit 17 is formed. Do not get caught and get out.

The foot valve 19 is installed at the upper end of the discharge passage 17 ′ of the bit 17. The foot valve 19 is seated in an air flow passage 13 ′ formed at the inner center of the piston 13, and lifts the piston 13 together with the valve body 7 and the inner sleeve 11. To form a flow path.

However, in the conventional drilling mill of such a configuration, the outer sleeve 3 rotates together with the bit 17 during the drilling process, and thus the perforation wall is not properly formed due to the frictional resistance with the perforated wall surface, or the perforation. There has been a problem that the rotational force of the device is reduced.

In addition, since a power unit such as the piston 13 is installed inside the outer sleeve 3 that is integrally formed with the bit 17, any one of the bit 17, the outer sleeve 3, or the power unit is abnormal. In case of occurrence, there is a problem that the cost of materials is increased because it is impossible to reuse all of them.

An object of the present invention is to solve the above-mentioned problems of the prior art, and to provide a direct punch bit device that allows the punching wall surface to be supported by a steel pipe to effect an effective punching operation.

In addition, another object of the present invention is to provide a direct punch bit device that can improve the work efficiency through a coupling structure that allows a simple detachment and precise coupling between the direct drill bit and the power transmission structure to which the rod is detached.

In order to achieve the above object, the present invention is a hollow steel tube shoe that is fixed to the rear end of the steel pipe, the rear end is a rotatable bit that is rotatably coupled to the front end of the steel pipe shoe, a plurality of cutting tips are provided on the front end And a power transmission structure inserted into the steel pipe to be detachably attached to the rear portion of the rectilinear bit, and having a shape corresponding to at least a portion of the power transmission structure coupled to the rear side of the rectilinear bit. It is characterized in that the addition is formed.

At this time, the power transmission structure, the bit coupling portion having an outer wall corresponding to the inner wall to the seating portion, and is formed integrally extending integrally formed with the bit coupling portion is configured to include a body coupled to the rod for transmitting power, The seating portion is bent from the first seating portion to have a first seating portion having an inner circumferential surface corresponding to an outer circumferential surface of the bit coupling portion of the power transmission structure to be inserted, and an inner diameter larger than that of the first seating portion, and the steel pipe shoe It is preferable that the front end of the structure includes a second seating portion in which a protruding frame is formed in the inner diameter direction along the corresponding edge so as to be constrained inside the rear portion of the perforated bit.

In addition, the steel pipe shoe has an outer diameter corresponding to the inner diameter of the steel pipe is provided at the rear end, and the rotation guide groove and the locking jaw are spaced apart from each other along the outer periphery of the corresponding tip, and when the steel pipe shoe and the direct drilling bit are combined It is preferable that a spring key is provided in the rotation guide groove to prevent the steel pipe shoe from being separated so that the protruding frame of the steel pipe shoe is constrained between the rotation guide groove and the locking jaw. In addition, it is preferable that the bit coupling portion is formed in a polygonal cross section, and the body portion has a diameter whose outer diameter corresponds to the inner diameter of the steel pipe shoe.

On the basis of the accompanying drawings will be described an embodiment of the present invention in detail.

2 and 3 are a partial cross-sectional view and a combined perspective view of the perforated bit device according to the present invention, Figure 4 is a partial cross-sectional view of the steel pipe shoe of the perforated bit device.

As shown in Figures 2 to 4, the subject innovation is a hollow steel pipe shoe 100 is fixed to the steel pipe 110, and the direct drilling bit 200 is rotatably coupled to the steel pipe shoe 100, It is configured to include a power transmission structure 300 detachable to the rear of the direct hole bit 200.

Specifically, the steel pipe shoe 100 has a hollow cylindrical shape, the steel pipe 110 and the direct hole bit 200 is coupled to the rear end and the front end thereof, respectively, and the power transmission structure 300 is inserted therein. Here, the steel pipe 110 is fixed to the rear end of the steel pipe shoe 100 has a hollow cylindrical shape, is coupled to the steel pipe shoe 100 through a fixing means such as welding. In particular, the inner diameter of the steel pipe 110 coupled to the steel pipe shoe 100 is formed to correspond to the outer diameter of the steel pipe shoe 100 corresponding to the steel pipe shoe 100 and the steel pipe 110 so that a close coupling is made. do.

The tip portion of the steel pipe shoe 100 is formed with a rotation guide groove 140 and the locking jaw 120 for rotatably coupling the straight hole bit 200. That is, the rotation guide groove 140 is formed along the outermost outer periphery of the distal end of the steel pipe shoe 100 in a groove shape, the locking jaw 120 is a predetermined shape from the rotation guide groove 140 in the shape of a protrusion. It protrudes along the outer circumference of the steel pipe shoe 100 spaced apart. Particularly, when the steel pipe shoe 100 and the direct drilling bit 200 are coupled to each other, the rotary guide groove 140 prevents the direct drilling bit 200 from being separated from the steel pipe shoe 100 and is independent. A spring key 130 is installed to allow rotation. At this time, between the rotation guide groove 140 and the locking step 120 so that the protruding frame 220 of the direct drilling bit 200 to be described later is positioned so that the direct drilling bit 200 is a steel pipe shoe by the rotational force and the percussion force ( Separation from 100) can be prevented.

In addition, the outer surface of the power transmission structure 300 is inserted in close contact with the inner surface of the steel pipe shoe 100, for this purpose, the outer diameter of the power transmission structure 300 is designed to correspond to the inner diameter of the steel pipe shoe (100). It is preferable to be.

5A and 5B are front and cross-sectional views of the power transmission structure according to the present invention.

As shown in Figure 5a and 5b, the power transmission structure 300 is formed integrally with the bit coupling portion 310 and the bit coupling portion 310 coupled to the direct hole bit 200, one side It includes a body portion 320 to which the power transmission rod 400 is coupled to the other side.

At this time, the bit coupling portion 310 has an outer wall corresponding to the inner wall of the seating portion 210 of the direct drilling bit 200, the body portion 320 is the outer diameter corresponding to the inner diameter of the steel pipe shoe (100) It is configured to have. As a result, when the power transmission structure 300 is coupled to the straight hole bit 200 and the steel pipe shoe 100, a close coupling between them is possible. In the present embodiment, the cross section of the bit coupling part 310 is formed in a hexagonal polygon and is closely coupled to the seating part 210 of the direct drilling bit 200, but is coupled to the direct drilling bit 200. The shape of the bit coupling part 310 is not limited thereto and may be changed and applied to various structures. At this time, the shape of the seating portion 210 is formed to correspond to the shape of the bit coupling portion 310 coupled thereto.

6A, 6B, and 6C are front views, cross-sectional views, and rear views of the perforated bits of the perforated bit apparatus according to the present invention, respectively.

As illustrated in FIGS. 6A to 6C, a seating portion 210 may be formed at the at least one portion of the power transmission structure 300 to be detached from the straight hole bit 200. That is, the seating portion 210 has a groove shape corresponding to at least a portion of the power transmission structure 300, and has a first seating portion 210a having an inner wall corresponding to an outer wall of the bit coupling portion 310. The first mounting part 210a may be bent to include a second seating part 210b having an inner diameter larger than the inner diameter of the first seating part 210a. In particular, a protrusion frame 220 is formed at the outermost edge of the second seating part 210b, and the protrusion frame 220 is coupled to the straight hole bit 200 and the steel pipe shoe 100 when the protrusion frame 220 is formed. The front end of the steel pipe shoe 100 is restrained from being separated from the rear end of the straight hole bit 200.

A flow path hole 260 is formed at the distal end portion of the straight hole bit 200 in which a flow path 250 communicating with the seating part 210 is exposed to the outside, and a plurality of cutting tips directly contacting the ground to be excavated ( 230 is installed. In addition, the discharge channel 240 is formed to extend in the centrifugal direction from the center of the distal end portion of the straight hole bit 200, the discharge channel 240 is ground in addition to the air discharged through the flow path hole 260 The slime generated during the excavation is discharged to the outside.

8 is a view showing a cross-sectional view of the perforated bit device according to a modification of the present invention, Figure 9 is a view showing a combined perspective view of the perforated bit device according to a modification.

On the other hand, as shown in Figure 8 and 9, the power transmission structure 300 according to a modification of the present invention is a bit coupling unit 310 and the bit coupling unit 310 is coupled to the direct hole bit 200 ) May be formed integrally with the body portion 320 to be in close contact with the steel pipe shoe 100, and the extension portion 330 extending in the longitudinal direction of the body portion 320.

Here, the extension part 330 is a portion to which the power transmission rod 400 is coupled, and a plurality of splines 340 are formed side by side in the longitudinal direction on the outer circumferential surface thereof. The spline 340 guides the lifting motion of the direct hole bit 200 coupled to the bit coupling unit 310, and causes the direct hole bit 200 to rotate.

Referring to the process of drilling the ground using the present invention according to such a configuration as follows.

Referring back to FIG. 2, first, the rear end of the steel pipe shoe 100 is coupled to the front end of the steel pipe 110 through fixing means such as welding, and a cutting tip 230 is provided at the front end of the steel pipe shoe 100. Rotating the perforated bit 200 is rotatable. At this time, the protruding frame 220 formed in the straight hole bit 200 is disposed to be located between the rotation guide groove 140 and the locking jaw 120 of the steel pipe shoe 100, the rotation guide groove 140 The spring key 130 is installed to prevent the direct drilling bit 200 from rotating and vertically moving away from the steel pipe shoe 100. In addition, by inserting the power transmission structure 300 connected to the rod 400 inside the steel pipe 110 fixed to the steel pipe shoe 100 fixed to the power transmission structure 300 in close contact with the direct drilling bit (200). Be sure to

7A and 10A are views illustrating a state in which the direct drilling bit device forms a drilling hole, and FIGS. 7B and 10B illustrate a state in which the power transmission structure is separated from the direct drilling bit device inserted into the drilling hole. The figure shown.

When the assembling of the direct punch bit device for drilling is completed as described above, as shown in FIG. 7A or FIG. 10A, the direct punch bit device is positioned on the ground to be punched, and the direct punch bit 200 is rotated and Hit to form a drill hole. At the same time, the steel pipe 110 is inserted into the drilling hole 200 along the straight drilling bit 200.

As shown in FIG. 7B or 10B, when the drilling operation for forming the drilling hole is completed by the direct drilling bit device, the power transmission structure 300 is separated from the direct drilling bit 200 to reverse the drilling direction. Retreat to When the power transmission structure 300 is continuously drawn out from the drilling hole, the steel pipe 110 combined with the direct drilling bit 200 remains in the drilling hole. Thereafter, the grouting may be performed by inserting a grouting injection device for grouting into the steel pipe 110 of the drilling hole.

As described above, the present invention is easy to remove the power transmission structure and the rod from the direct drilling bit can be reused of them, saving construction time, there is an advantage to improve the work efficiency.

While the present invention has been shown and described in connection with specific embodiments, it should be understood that the present invention may be variously modified and changed without departing from the spirit or the scope of the present invention provided by the following Utility Model Registration Claims. It will be obvious to those with ordinary knowledge in the industry.

As described above, according to the present invention, after the excavation is completed, the power transmission structure and the rod can be separated from the direct drill bit and reused, thereby reducing the cost and cost of construction. have.

In addition, the present invention has the advantage of saving construction time and improving the work efficiency through a coupling structure to be detachable between the direct drilling bit and the power transmission structure mounted thereon is made simple and precise.

In addition, the present invention has the advantage that the insertion of the steel pipe with the perforation of the ground is implemented at the same time, the continuous grouting method can be applied to the perforated ground to increase the work productivity.

Claims (6)

Hollow steel pipe shoe fixed to the rear end of the steel pipe, A direct drilling bit rotatably coupled to a front end of the steel pipe shoe at a rear end thereof and provided with a plurality of cutting tips at the front end thereof; A power transmission structure inserted into the steel pipe and coupled to be detachably attached to the rear portion of the straight hole bit; Inside the rear part of the perforated bit And a seating portion having a shape corresponding to at least a portion of the power transmission structure coupled thereto. The method according to claim 1, The power transmission structure, A bit coupling part having an outer wall corresponding to an inner wall of the seating part; And a body portion having a rod coupled to the bit coupling portion and integrally formed with the rod to transfer power. The method according to claim 1 or 2, The seating portion A first seating portion having an inner wall corresponding to an outer wall of the bit coupling portion of the power transmission structure being inserted; A second bent from the first seated portion to have an inner diameter larger than the inner diameter of the first seated portion, and a second protruding frame is formed in the inner diameter direction along a corresponding edge such that a tip portion of the steel pipe shoe is restrained inside the rear portion of the straight hole bit; Direct drilling bit device comprising a seating portion. The method according to claim 3, The steel pipe shoe An outer diameter corresponding to the inner diameter of the steel pipe is formed at the rear end, The rotation guide groove and the locking jaw are respectively spaced apart along the outer circumference of the corresponding tip, When the steel pipe shoe and the direct drilling bit is combined, the spring guide for preventing the separation of the steel pipe shoe is installed in the rotary guide groove so that the protruding frame of the steel pipe shoe is bound between the rotation guide groove and the locking jaw. Punched bit device. The method according to claim 3, The bit coupling portion The perforated bit device, characterized in that the cross section is formed in a polygonal shape. The method according to claim 3, The body portion The perforated bit device, characterized in that the outer diameter has a diameter corresponding to the inner diameter of the steel pipe shoe.

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