KR20230025293A - Excavation device - Google Patents

Abstract

The present invention relates to an excavation device for excavating the ground to install an H-beam on the ground. The excavation device includes: a driving unit installed at the end of a crane to ascend and descend and including an outer case connection unit on the circumference of a rod connection unit, wherein the rod connection unit is installed at the center to rotate; an excavation unit comprising a rod and a hammer bit; an outer case fixed to an outer casing connection unit and arranged on the circumference of the rod and the hammer bit; and a slime discharge unit for discharging slime generated when the ground is excavated to the outside by using the hammer bit. The rod is fixed and connected to the rod connection unit and extended into the excavated ground by rotating with the rod connection unit as the rod connection unit rotates. The hammer bit is installed at an end of the rod and bores the ground. The outer case has a slime discharge space unit for discharging the slime by being extended into the excavated ground. The additional outer case rotating is installed on the outside of the rod connected to the hammer bit so that a vortex is formed in the space between the rod and the outer case. Accordingly, friction between the outer surface of the rod and the slime and the inner surface of the outer case and the slime is reduced when the excavation device sucks the slime. Therefore, the excavation device can improve excavation efficiency by rapidly and effectively sucking and discharging the slime.

Description

Excavation device {EXCAVATION DEVICE}

The present invention relates to a drilling device, and more particularly, by installing a separate outer case for rotational driving outside a rod to which a hammer bit is connected to form a vortex in the space between the rod and the outer case, thereby sucking slime It relates to a drilling device that can improve drilling efficiency by reducing the friction between the outer surface of the rod and the slime and the inner surface of the outer case and the slime to quickly and effectively suction and discharge the slime.

PRD (Percussion Rotary Drill) method and RCD (Reverse Circulation Drill) method are known as one of the pile hole excavation methods for drilling the ground to fix foundation piles in the underground rock layer. In these methods, as in the example shown in FIG. 1, a hammer or a drill rod is usually mounted on the end of a rotating shaft installed on a crane to hit or rotate it up and down to excavate the bedrock.

First, the PRD method is a method in which a hammer is mounted on the lower end of a rotating shaft of a crane, and a piston in the hammer is moved up and down by high-pressure compressed air to strike a bit at the end of the hammer so that the bit strikes and crushes the rock.

As hammers used in the PRD method, there are a mono hammer in which bits are made of a single body and a cluster drill hammer in which bits are divided into several pieces.

The mono hammer is a type in which a drill bit made of a single body is mounted on the end of a hammer body (the entire assembly in FIG. 1) as in the example shown in FIG. 1 and installed on the rotation shaft of a crane. The combination hammer is a type in which drill bits divided into several pieces are mounted on the end of the hammer body and installed on the rotation axis of the crane.

In general, in the case of a mono hammer, the excavation speed is high, but there is a limit to the increase in the size of the forged product required for bit production, so it is mainly applied to construction with a maximum excavation diameter of 1,200 mm, and in the case of a combination hammer, the excavation diameter is 800 ~ 5,000 mm Since it can be extended up to , there are fewer restrictions on the drilling aperture compared to the mono hammer, but the drilling speed is somewhat lower.

Since this PRD method excavates by hitting the bedrock using a hammer/bit, it can excavate most of the hard strata regardless of geology, and is superior to other methods in terms of excavation speed. Since the diameter is the same as the drilling diameter, it has the advantage of excellent verticality of the pile hole.

However, since a large-scale compressor device is required to generate compressed air for driving the hammer, a lot of fuel is consumed to drive the compressor device. Typically, 4 to 5 compressor equipment are required for a drilling diameter of 1,000 mm, and 60 to 75 L/h of diesel fuel is consumed per unit for engine operation. In this case, since a lot of diesel fuel, typically 3,000 to 3,500 liters per day, is consumed, 30 to 50% of the construction cost is even consumed as fuel cost.

In addition, there are also disadvantages in that noise and vibration are generated as the hammer / bit generates civil complaints, and the weight of the excavation equipment and the excavation rod increases.

Next, in the RCD (Reverse Circulation Drill) method, a special bit (eg, roller bit) is attached to the end of the drill rod and rotated to crush the bedrock, and the crushed excavated soil goes to the ground along with the circulating water through the drill rod pipe It has the principle of excavating while circulating the circulating water through the sedimentation tank and back to the drilling hole.

The RCD method has advantages such as low fuel consumption, no noise and vibration as it does not use a hammer, and less restrictions on the diameter of the drilling hole. There is a disadvantage that the excavation speed is significantly lowered, and there is also a disadvantage that the verticality is lower than that of the PRD method.

Meanwhile, as another method of drilling a pile hole, a Barrett pile method is known.

The Barrett pile method is a form of forming a pile hole in a square shape. A bucket rotating by a hydraulic pump is installed at the bottom of the drill, and several bits are attached to the circumference of the bucket to excavate by the principle of scraping rather than hitting. am.

This barret pile method is advantageous for noise and vibration because it does not use a hammer, but the excavation aperture is limited to a square rather than a circle, and in particular, it is difficult to excavate when rock mass appears during excavation due to the special feature of scraping the ground. there is.

The object of the present invention, devised in view of the above points, is to install a separate outer case for rotational driving outside the rod to which the hammer bit is connected so that a vortex is formed in the space between the rod and the outer case, thereby sucking the slime It is to provide a drilling device capable of improving drilling efficiency by reducing the friction between the outer surface of the rod and the slime and the inner surface of the outer case and the slime to quickly and effectively suction and discharge the slime.

An excavation device for achieving the object of the present invention as described above is an excavation device for excavating the ground in order to install an H beam in the ground, and is installed at the end of a crane to be movable up and down, and a rod coupling part in the center is rotatable. It is installed, and the driving unit provided with an outer case coupling portion around the rod coupling portion; An excavation part composed of a rod fixedly coupled to the rod coupling part and driven together to rotate as the rod coupling unit rotates and extending into the excavated ground, and a hammer bit provided at an end of the rod and drilling the ground; An outer case fixedly coupled to the outer casing coupling part, disposed around the rod and the hammer bit, and extending into the excavated ground to form a slime discharge space for discharging slime; A slime discharge unit for discharging slime generated when excavating the ground using the hammer bit to the outside; characterized by including

Here, the outer casing coupling portion may be driven to rotate in the opposite direction to the rod coupling portion to rotate the outer case in the opposite direction to the rod to form a vortex inside the slime discharge space.

The outer case coupling portion and the rod coupling portion may be fixedly coupled to the inner sun gear and the outer sun gear of the planetary gear installed inside the driving unit, respectively.

In addition, the slime discharge unit communicates with the slime discharge space and has a slime discharge port formed by cutting one side of the outer surface of the drive unit, a slime discharge pipe connected to the slime discharge port to suction and discharge slime, and an end of the slime discharge pipe It may include a slime receiving tank in which the slime that is connected and discharged is accommodated.

In addition, a guide plate for guiding the movement of the slime may be formed to protrude from the inner plate surface of the drive unit inside the slime outlet.

In addition, a fastening protrusion protrudes from a side surface of the outer case, and an 'L'-shaped fastening groove into which the fastening protrusion is inserted and engaged may be recessed on an inner plate surface of the outer case coupling part.

As described above, the drilling apparatus according to the present invention installs a separate outer case that is rotated and driven outside the rod to which the hammer bit is connected so that a vortex is formed in the space between the rod and the outer case, so that the rod when sucking the slime By reducing the friction between the outer surface of the slime and the inner surface of the outer case and the slime, the slime is sucked and discharged quickly and effectively, thereby improving excavation efficiency.

1 is a side view showing the structure of a conventional general drilling device;
2 is a side view showing the structure of a drilling device according to an embodiment of the present invention;
Figure 3 is a front cross-sectional view along the line 'Ⅲ-Ⅲ' of Figure 2,
4 is a perspective view showing a coupling structure of a driving unit, a case, and a rod of a drilling rig according to an embodiment of the present invention.

Hereinafter, a drilling device according to an embodiment of the present invention will be described in more detail with reference to the accompanying drawings.

Figure 2 is a side view showing the structure of a drilling device according to an embodiment of the present invention, Figure 3 is a front cross-sectional view taken along the line 'III-Ⅲ' of Figure 2, Figure 4 is according to an embodiment of the present invention It is a perspective view showing the coupling structure of the driving unit, the case, and the rod of the drilling device.

As shown in these figures, the drilling device according to one embodiment of the present invention is a drilling device for excavating the ground to install the H-beam on the ground, and is installed at the end of the crane 1 to be movable up and down, and is installed in the center A rod coupling portion 110 is rotatably installed, and the driving unit 100 is provided with an outer case coupling portion 120 around the rod coupling portion 110; A rod 210 fixedly coupled to the rod coupling portion 110 and driven to rotate together as the rod coupling portion 110 rotates and extending into the excavated ground, and provided at an end of the rod 210 An excavation unit 200 made of a hammer bit 220 to drill the ground; A slime discharge space 310 for discharging slime by being fixedly coupled to the outer casing coupling part 120 and disposed around the rod 210 and the hammer bit 220 and extending into the excavated ground to discharge slime An outer case 300 forming a; It is configured to include a slime discharge unit 400 for discharging the slime generated when excavating the ground using the hammer bit 220 to the outside.

The drive unit 100 is coupled to the end of the crane 1 and is installed to be able to move up and down by the crane 1, and is connected to an oil pressure device and driven by the oil pressure device. The rod coupling portion 110 and the outer case coupling portion 120 provided to protrude in the height direction are rotated and driven.

The rod coupling part 110 is provided on the lower surface of the central region of the driving unit 100 and is formed to have a relatively small diameter, and the outer case coupling part 120 is disposed on a concentric circle with the rod coupling part 110, and the rod coupling part It is formed to have a relatively larger diameter than (110).

The rod 210 is screwed into the rod coupling portion 110 to rotate and drive together according to the rotational drive of the rod coupling portion 110, and the outer case 300 is fixedly coupled to the outer case coupling portion 120 so that the outer case According to the rotational driving of the coupling part 120, it is also rotationally driven.

An 'L'-shaped fastening groove 121 is recessed on the inner plate surface of the outer case coupling part 120, and on the side of the outer case 300, a fastening protrusion 320 that is inserted into the fastening groove 121 and engaged By being protruded, the coupling of the outer case coupling part 120 and the outer case 300 is made.

The outer case coupling portion 120 and the rod coupling portion 110 are fixedly coupled to the inner sun gear 131 and the outer sun gear 132 of the planetary gear 130 installed inside the drive unit 100, respectively.

Therefore, the outer case coupling portion 120 is rotated in the opposite direction to the rod coupling portion 110 to rotate the outer case 300 in the opposite direction to the rod 210 to vortex inside the slime discharge space portion 310 It is effective to quickly suck the slime by forming a.

The excavation unit 200 is fixedly coupled to the rod coupling unit 110, and as the rod coupling unit 110 rotates and drives together, the rod 210 extending into the excavated ground and the rod 210 It consists of a hammer bit 220 provided at an end and substantially drilling the ground while in contact with the ground.

A screw thread is formed on the outer surface of the upper end of the rod 210 coupled to the rod coupling part 110, and the rod 210 is preferably formed to be mutually assembled so as to extend its length as the excavation progresses. .

An air injection hole 211 is formed through the inner center of the rod 210 along the longitudinal direction, and air is injected through the air injection hole 211 while excavating the ground, so that the slime is discharged through the slime discharge device 310 allow it to be released.

The hammer bit 220 is coupled to the lower end of the rod 210 and has a structure in which a plurality of tips protrude from the lower surface in order to directly hit the ground or excavate the ground while rotating.

The outer case 300 is fixedly coupled to the outer casing coupling part 120 and disposed around the rod 210 and the hammer bit 220, and extends into the excavated ground to discharge slime to discharge slime A space portion 310 is formed.

On the inner surface of the outer case 300, a plurality of fastening grooves 320 formed in a 'B' shape for fastening the outer case 300 to the fastening protrusion 121 formed on the outer case coupling part 120 are recessed. there is.

On the other hand, the slime discharge unit 400 serves to discharge the slime generated when excavating the ground using the hammer bit 220 to the outside through the slime outlet 410.

The slime discharge unit 400 communicates with the slime discharge space 310 and is connected to the slime discharge port 410 formed by cutting one side of the outer surface of the drive unit 100 and the slime discharge port 410 to suction and discharge the slime It is configured to include a slime discharge pipe 420 so as to be connected to an end of the slime discharge pipe 420 and a slime accommodating tank 430 in which the discharged slime is accommodated.

And, on the inner plate surface of the drive unit 100 inside the slime outlet 410, the slime discharge port 410 to discharge the slime transported upward through the slime discharge space 310 to the outside through the slime outlet 410 A discharge hole 150 communicating with is formed through.

In addition, the guide plate 140 for guiding the movement of the slime is formed to protrude from the inner plate surface of the driving unit 100 inside the slime outlet 410, so that the slime moved upward along the slime discharge space 310 is discharged By guiding the direction to be, it is possible to enable effective discharge.

As shown in FIG. 4, in the case of the drilling device according to an embodiment of the present invention, the guide plate 140 is formed in a shape having a flat plate surface, but the plate surface of the guide plate 140 is bent if necessary. Of course, it is possible to more effectively discharge the slime by forming the slime and extending the end to the slime outlet 410.

A process of excavating the ground using the excavation apparatus according to an embodiment of the present invention having the configuration described above will be described as follows.

First, after installing the drive unit 100 rotatably provided with the rod coupling part 110 and the outer case coupling unit 120 at the end of the crane 1 to be able to move up and down, the drive unit 100 is moved to a certain height. will be placed

In this state, the rod 210 constituting the excavation part 200 is coupled to the rod coupling portion 110, the hammer bit 220 is coupled to the end of the rod 210, and the outer case coupling portion 120 is formed. The outer case 300 is coupled to the outer case coupling part 120 using the fastening groove 121 and the fastening protrusion 320 formed on the outer case 300 .

When the rod 210 and the outer case 300 are coupled to the rod coupling part 110 and the outer case coupling part 120, respectively, the ground to be excavated by moving the driving unit 100 downward using the crane 1 In a state where the and hammer bit 220 are brought into contact, the drive unit 100 is driven to start excavation of the ground.

Here, looking at the process of excavating the ground in detail, the rod 210 of the excavation unit 200 rotates while the rod coupling unit 110 to which the excavation unit 200 is coupled rotates, and the rod 210 rotates. As a result, the hammer bit 220 provided at the end of the rod 210 is driven to rotate and excavation is performed while crushing the ground.

While excavation is made by crushing the ground, high-pressure air is injected through the air injection hole 211 formed in the inner center of the rod 210 so that the slime is quickly sucked into the slime outlet 410.

In addition, the outer case coupling portion 120 to which the outer case 300 is coupled rotates opposite to the rod coupling portion 110 so that the outer case 300 rotates opposite to the excavation portion 200, whereby the slime discharge space Since a vortex is formed inside the part 310, the slime effectively moves upward along the discharge space 310, passes through the discharge hole 150, and then is discharged to the outside through the slime outlet 410.

When the slime is discharged to the slime outlet 410, the guide plate 140 guides the movement toward the slime outlet 410, so it can be easily discharged, and the slime discharged to the outside through the slime outlet 410 After moving along the slime discharge pipe 420, it is accommodated in the slime container 430.

In addition, as the excavation of the ground progresses, the excavation proceeds while extending the length of the rod 210 and the length of the outer case 300, and when excavation is performed to the desired depth, the rod 210 using the crane 1 ) And the excavation of the ground is completed by moving the outer case 300 upward and separating from the excavation hole.

The drilling rig having the above configuration installs a separate outer case that rotates and drives the outside of the rod to which the hammer bit is connected so that a vortex is formed in the space between the rod and the outer case, so that when the slime is sucked, the outer surface of the rod and It is possible to improve the excavation efficiency by reducing the friction between the slime and the inner surface of the outer case and the slime so that the slime is sucked and discharged quickly and effectively.

Since the above has only been described with respect to some of the preferred embodiments that can be implemented by the present invention, as noted, the scope of the present invention should not be construed as being limited to the above embodiments, and the scope of the present invention described above It will be said that the technical idea and the technical idea together with the root are all included in the scope of the present invention.

1: crane 100: driving unit
110: rod coupling part 120: outer case coupling part
130: planetary gear 131: inner sun gear
132: outer sun gear 140: guide plate
200: excavation unit 210: rod
220: hammer bit 300: outer case
310: slime discharge space 320: fastening protrusion
400: slime outlet 410: slime outlet
420: slime discharge pipe 430: slime water tank

Claims (6)

As an excavation device for excavating the ground to install the H beam on the ground,
It is installed to be able to move up and down at the end of the crane 1, the rod coupling part 110 is rotatably installed in the center, and the driving unit provided with the outer case coupling part 120 around the rod coupling part 110. (100) and;
A rod 210 fixedly coupled to the rod coupling portion 110 and driven to rotate together as the rod coupling portion 110 rotates and extending into the excavated ground, and provided at an end of the rod 210 An excavation unit 200 made of a hammer bit 220 to drill the ground;
A slime discharge space 310 for discharging slime by being fixedly coupled to the outer casing coupling part 120 and disposed around the rod 210 and the hammer bit 220 and extending into the excavated ground to discharge slime An outer case 300 forming a;
A slime discharge unit 400 for discharging the slime generated when the ground is excavated using the hammer bit 220 to the outside;
A drilling rig comprising According to claim 1,
The outer casing coupling portion 120 is rotated in the opposite direction to the rod coupling portion 110 to rotate and drive the outer case 300 in the opposite direction to the rod 210 so that the slime discharge space portion 310 A drilling rig characterized in that it forms a vortex therein. According to claim 2,
The outer case coupling portion 120 and the rod coupling portion 110 are fixedly coupled to the inner sun gear 131 and the outer sun gear 132 of the planetary gear 130 installed inside the drive unit 100, respectively. featured drilling rig. According to claim 1,
The slime outlet 400 communicates with the slime outlet space 310 and is connected to a slime outlet 410 formed by cutting one side of the outer surface of the drive unit 100 and the slime outlet 410 to remove the slime. A drilling device comprising a slime discharge pipe 420 that is suctioned and discharged and a slime accommodating tank 430 connected to an end of the slime discharge pipe 420 and receiving the discharged slime. According to claim 4,
Drilling device, characterized in that the guide plate 140 for guiding the movement of the slime is formed to protrude on the inner plate surface of the drive unit 100 inside the slime outlet 410. According to claim 1,
A fastening protrusion 320 protrudes from the side surface of the outer case 300, and the fastening protrusion 320 is inserted into and engaged with the inner plate surface of the outer case coupling part 120 to form a 'L'-shaped fastening groove. (121) is a drilling rig, characterized in that the recessed formation.

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