KR20200095706A - Punching Machine For Multistage Method of Straight Punching Steel Pipe and Construction Method Thereof - Google Patents

Abstract

The present invention relates to a punching device for a multistage method of directly punching a steel pipe and a construction method. According to the present invention, the punching device for a multistage method of directly punching a steel pipe comprises: a base of a rod shape having a length; a sliding unit arranged on the base to be moved in the longitudinal direction; a movement driving unit arranged on the base to move the sliding unit back and forth in the longitudinal direction; a steel pipe rotary joint which is arranged on the sliding unit and has a hollow steel pipe adaptor allowing a steel pipe to be detachably connected thereto; a first jockey unit separated in front of the sliding unit to be arranged on the base to grip a steel pipe; a second jockey unit separated behind the first jockey unit to be arranged on the base (210) between the sliding unit and the first jockey unit to grip and rotate a steel pipe; and a rod rotary joint which is separated behind the steel pipe rotary joint to be arranged on the sliding unit, and has a rod adaptor allowing a rod to be detachably connected thereto. Quick work is possible. A steel pipe is prevented from shaking when punching, and straightness is improved.

Description

Punching Machine For Multistage Method of Straight Punching Steel Pipe and Construction Method Thereof}

The present invention relates to a perforation device and a construction method for a straight-forged steel pipe multi-stage construction method, and to a perforation device and a construction method for a straight-forged steel pipe multi-stage construction method that enables rapid work, prevents shaking of the steel pipe during drilling, and improves straightness. .

In general, when excavating underground or slopes in the form of a tunnel, a number of pipes are used to provide stress to the ground around the excavated site prior to excavation as a method to increase the reinforcement and stability of the ground in a soil section with poor or unstable geological conditions. After arranging (steel pipes) in the form of arches or rafters, the grout material is penetrated into the stratum through the backflow prevention valves formed evenly in the pipe and the entire part of the pipe, thereby preliminary petroleum soil of the excavated ground. Auxiliary methods, such as the so-called steel pipe reinforcement type multi-stage grouting method, the pipe roop method, or the Reinforced Protective Umbrella Method (RPUM), which enable the stabilization of the ground before membrane loading, have been disclosed. The various auxiliary methods are based on a porepoling method in which a hole is drilled in the soft ground to inject and solidify a stabilizer therein.

As shown in Figures 1 and 2, the conventional perforation apparatus 100 for a multi-stage straight-punched steel pipe construction method includes a base 110, a sliding part 120, a moving drive part, a rod 141, and a rotary joint. (143), an injection pipe 147, a head portion 150, a perforation portion 160, a steel pipe support portion 170, and a buffer portion.

The base 110 is coupled to the vehicle 200 to enable separation and assembly. The base 110 is a steel rod-shaped structure. The base 110 has a cross-section having a flange protruding in the width direction above and below the "I" shape, and a sliding part 120 along the base 110 is provided to enable reciprocating motion in the longitudinal direction. At the front end of the base 110, a base support 111 in the form of a protrusion fixed to the ground so that the base 110 does not shake is provided.

The vehicle 200 is a vehicle used for a drilling machine or an excavator.

The sliding part 120 is provided on the base 110. Concave grooves facing each other extend along the length direction on both sides of the sliding part 120 in the width direction, and flanges on both upper sides of the base 110 are slidably inserted into the grooves facing each other in the longitudinal direction. The sliding part 120 is provided to be slidable on the base 110. The sliding part 120 is connected to a moving drive part.

2 and 3, the movable drive unit is connected to the sliding unit 120 so that the sliding unit 120 can reciprocate in the longitudinal direction. The moving drive unit includes a motor 131, a first sprocket 132, a second sprocket 135, and a chain 133. The motor 131 is provided at the rear of the base 110. The first sprocket 132 is connected to the drive shaft of the motor 131 and is installed on the base 110 so as to be rotatable. The second sprocket 135 is provided in the base 110 to be spaced apart from the first sprocket 132 in the longitudinal direction. The second sprocket 135 is connected to a rotation shaft provided at one side in front of the base 110 and is rotatably provided. The chain 133 is provided by winding the first sprocket 132 and the second sprocket 135 in a closed circuit. The power of the motor 131 is transmitted to the second sprocket 135 due to the chain 133. The chain 133 is connected to the sliding part 120. Therefore, when the chain 133 moves between the first sprocket 132 and the second sprocket 135, the sliding part 120 is also moved, so that the sliding part 120 can reciprocate in the longitudinal direction. Is done.

As a moving driving part for moving the sliding part 120 in the longitudinal direction of the base 110, it is also referred to as a pneumatic cylinder, a screw type actuator, or the like.

As shown in FIG. 2, the head part 150 is provided on the sliding part 120. The head unit 150 is provided above the sliding unit 120 and reciprocates along with the sliding unit 120 in the longitudinal direction. The head unit 150 provides power required for drilling. The head unit 150 includes a vibrator and a motor to transmit vibration and rotational force to the rod 141. A rod 141 is connected to the head unit 150.

The rod 141 is a hollow body, and a male thread is formed on the outer diameter surface of one end and a female thread is formed on the inner diameter surface of the other end. Accordingly, one end of the rod 141 and the other end of the other rod 141 are screwed and connected. The rod 141 is provided to be parallel to the base 110. The rod 141 is inserted into the steel pipe 10, and the outer diameter of the rod 141 is formed smaller than the inner diameter of the steel pipe 10.

The rotary joint 143 is provided on the sliding part 120. The rotary joint 143 is provided by being connected to an end of the rod 141 connected to the head unit 150. The rotary joint 143 is provided with a steel pipe adapter connected to the steel pipe 10, and rotates the steel pipe 10 connected to the steel pipe adapter. The rotary joint 143 is provided with a motor that rotates the steel pipe adapter.

The steel pipe 10 is a hollow body, a male thread is formed on the outer diameter surface of one end and a female thread is formed on the inner diameter surface of the other end, so that one end of the steel pipe 10 and the other end of the other steel pipe 10 are screwed and connected.

An injection pipe 147 is provided in the rotary joint 143. One side of the injection pipe 147 is connected to the rotary joint 143 and the other side is connected to a discharge water injection device (not shown). The injection pipe 147 is provided with a valve 1471 for controlling the inflow of discharged water. Drained water flows into the rotary joint 143 through the injection pipe 147. The discharged water introduced into the rotary joint 143 is discharged by moving through the inner hollow of the rod 141 to the perforation 160 where the perforation is made. The discharged water is discharged to the outside together with the sludge generated during drilling.

As shown in FIG. 4, the perforation 160 is provided at the end of the rod 141. The perforation 160 includes a pilot bit 161, a ring bit 163, and a casing shoe 165. The pilot bit 161 is provided by being coupled to an end of the rod 141.

The outer diameter of the pilot bit 161 is smaller than the inner diameter of the steel pipe 10 so that the pilot bit 161 can be inserted into the steel pipe 10. In the pilot bit 161, a drain hole 1611 communicating with the inner hollow of the rod 141 is formed to communicate with the outside through the front surface. The pilot bit 161 rotates integrally with the rod 141.

The ring bit 163 is coupled to the pilot bit 161 to facilitate separation and assembly.

The fastening of the pilot bit 161 and the ring bit 163 is described in Korean Patent Publication No. 10-2012-0034432 with reference to FIGS. 4 and 5. The pilot bit 171 is spaced apart in the circumferential direction along the longitudinal direction to form three insertion grooves 174, the ends communicate with the insertion groove 174, and a coupling groove 173 extending in the circumferential direction is formed, The inner diameter 176 of the ring bit 175 is spaced apart in the circumferential direction and has the same number of coupling protrusions 177 as the insertion groove 174 protruding. When the pilot bit 171 is inserted into the inner diameter of the ring bit 175 and the coupling protrusion 177 follows the insertion groove 174 and the pilot bit 171 rotates to one side at the coupling groove 173 formation position, the coupling protrusion ( 177 is inserted into the coupling groove 173 and caught on the end of the coupling groove 173, so that the pilot bit 171 and the ring bit 175 are fastened. When rotated in the opposite direction, the pilot bit 171 and the ring bit 175 are separated from each other.

The ring bit 163 is connected to the pilot bit 161 and thus rotates in the fastening direction of the ring bit 163 and the pilot bit 161 so that the ground is punctured. After drilling, the pilot bit 161 is separated from the ring bit 163 by turning in the opposite direction to the ring bit 163.

The casing shoe 165 is welded with a part inserted into the end of the steel pipe 10. The casing shoe 165 is configured such that the end of the casing shoe 165 into which the steel pipe 10 is inserted is caught when the pilot bit 161 advances. In addition, the inner peripheral surface of the casing shoe 165 is rotatably contacted with the outer peripheral surface of the pilot bit 161.

As shown in Figure 4, the casing shoe 165 is welded to the end of the steel pipe 10, the pilot bit 161 is exposed to the outside through the end of the steel pipe 10 in which the casing shoe 165 is installed. A ring bit 166 is fastened to the pilot bit 161.

The pilot bit 161 positions the perforation device 100 for a multi-stage straight-perforated steel pipe in the perforation target portion, and then perforates the perforation target portion through front-rear vibration and rotation by a driving force provided from the head portion 150.

The steel pipe support part 170 is provided on the guide part 110. The steel pipe support part 170 is provided at the front end of the guide part 110. The steel pipe 10 is inserted into the steel pipe support part 170 to support the front end of the steel pipe 10. A description of the steel pipe support 170 is described in Korean Patent Registration No. 10-1804854.

In the conventional perforation device and construction method for a multi-stage straight-through steel pipe construction method as described above, when additionally combining the steel pipe and the rod according to the drilling depth, the pilot bit 161 must be separated from the ring bit 166, and the separated ring bit If (166) is not in a separate state and tilts or falls, it cannot be recombined, and the perforation is closed and has to be re-drilled from the beginning, resulting in wasted work time and cost, and it is easy to connect additional steel pipes or rods. It was not done, and there was a problem in that it was not easy to remove the rod after drilling, and to pull out the steel pipe from the drilled portion if necessary.

Korean Registered Patent No. 10-1804854 Korean Publication No. 10-2012-0034432 Patent Publication

The present invention has been proposed in order to solve the problems of the prior art as described above, since there is no need to separate the pilot bit and the ring bit when adding a steel pipe and a rod, the work is done quickly, and the inclination or fall of the ring bit Therefore, there is no problem that the perforation is closed, the straightness is improved, and the straight-perforated steel pipe multi-stage method drilling apparatus and construction method are provided to prevent the shaking of the steel pipe.

The straight-through steel pipe multi-stage drilling device according to the present invention includes a rod-shaped base having a length, a sliding part provided on the base to be movable in the longitudinal direction, and a sliding part provided on the base to reciprocate the sliding part in the longitudinal direction. A steel pipe rotary joint provided on the moving drive unit and the sliding unit and having a steel pipe adapter that is a hollow body to which the steel pipes are detachably connected, and a first jockey unit that is provided in the base and spaced forward from the sliding unit to hold the steel pipe And, a second jockey part which is spaced rearward from the first jockey part and is provided on the base 210 between the sliding part and the first jockey part and grips and rotates, and the sliding part is spaced rearward from the steel pipe rotary joint. It is provided and includes a rod rotary joint having a rod adapter to which the rod is detachably connected;

At least one steel pipe including a steel pipe with a casing shoe coupled to the front end is coupled to the steel pipe adapter, and a pilot bit is provided at the front end and at least one rod including a rod inserted into the steel pipe is provided, and the rod passes through the steel pipe adapter. It is coupled to the rod adapter, and a ring bit is coupled to the pilot bit so as to be detachable while rotating at the front end of the pilot bit;

The sliding unit includes a slider provided on the base to be movable in the longitudinal direction thereof, and an auxiliary slider provided on the slider to be movable in the longitudinal direction of the base;

The steel pipe rotary joint is installed on an auxiliary slider, and the rod rotary joint is installed on the slider, and an adjustment means for adjusting the distance between the steel pipe rotary joint and the rod rotary joint is provided. to provide.

In the above, the steel pipe rotary joint is a steel pipe rotary joint case coupled to an auxiliary slider, a steel pipe joint driving gear rotatably installed on the steel pipe rotary joint case, and a steel pipe joint driving gear rotatably installed on the steel pipe rotary joint case. A steel pipe joint driven gear engaged with the steel pipe joint, and a steel pipe rotary joint motor installed in the steel pipe rotary joint case to rotate the steel pipe joint driving gear;

The steel pipe joint driven gear is a hollow body, and the steel pipe adapter rotates integrally with the steel pipe joint driven gear and is inserted into the steel pipe joint driven gear so as to be slidable in the longitudinal direction; It is characterized in that the rear end of the steel pipe is coupled to the front end.

In the above, the steel pipe adapter is characterized in that it comprises an adapter engaging portion protruding outwardly at the rear end to be coupled to the steel pipe rotary joint case.

In the above, it is characterized in that it is provided in the slider to the rear of the rod rotary joint and characterized in that it further includes a head for applying vibration to the front to the rod.

In the construction method using the above-described straight-through steel pipe multi-stage drilling system;

The coupling of the rear end of the steel pipe to the steel pipe adapter is maintained, and the rotation direction of the rod by the rod rotary joint and the rotation direction of the steel pipe by the steel pipe rotary joint are opposite, and the steel pipe joint driven gear and the driven gear by the vibration added by the head There is provided a construction method using the described straight-through steel pipe multi-stage drilling device, characterized in that sliding relative motion occurs in the longitudinal direction between the steel pipe adapters.

In the above, a steel pipe rod adding step of adding a steel pipe and a rod to a rear end of the steel pipe and a rear end of the rod is further included;

The steel pipe rod adding step includes a steel pipe adapter separating step in which the steel pipe adapter is rotated in a loosening direction by a steel pipe rotary joint by holding the rear end of the steel pipe in the first jockey, and the screw connection between the steel pipe and the steel pipe adapter is released, and the steel pipe adapter is separated. In the step, the steel pipe adapter is characterized in that it slides backward in the longitudinal direction in the steel pipe joint driven gear by loosening while rotating.

In the above, further comprising a rod withdrawal step of drilling to a set depth while adding the steel pipe and the rod, and withdrawing the rod after the drilling operation;

In the rod withdrawal step, the rear end of the steel pipe is gripped by the first jockey part, the steel pipe adapter is gripped by the second jockey part to release the screw connection between the steel pipe and the steel pipe adapter, the gripping of the second jockey part is released, and the rotation of the steel pipe rotary joint A steel pipe adapter separation step in which the steel pipe and the steel pipe adapter are separated by,

A rod exposure step in which the steel pipe rotary joint is retracted toward the rod joint cylinder by the operation of the adjusting means, and the connection between the rear end of the rod and the front end of the rod adapter is exposed between the steel pipe and the steel pipe adapter;

A bit separation step in which the ring bit and the pilot bit are separated by rotation of the rod rotary adapter,

A second rod exposure step of exposing the rear end of the rear second rod to the end of the steel pipe by retreating the sliding portion by the operation of the moving drive unit;

A rod first separation step of separating the screwing of the rear end of the rear second rod and the front end of the rod by holding the rear second rod by the second jockey and rotating the rod rotary joint;

A second rod separation step of moving forward again in a separated state to grip the rear end of the rod with the second jockey and rotating the rod rotary joint to separate the rear end of the rod from the rod adapter;

A rod removal step of gripping and removing the rear rod with a stacking device,

By the operation of the moving drive unit, the sliding unit moves forward, is located in the steel pipe, and the end is close to the end of the exposed rod (the rod that was the second rod in the rear), and the rod rotary joint rotates to connect the rod and the rod adapter. It is characterized in that the plurality of rods are sequentially withdrawn.

The straight-through steel pipe multi-stage drilling device and construction method according to the present invention do not need to separate the pilot bit and the ring bit when adding a steel pipe and a rod, so the work is done quickly, and the drilling is closed due to the inclination or fall of the ring bit. There is no problem, and straightness is improved, and there is an effect of preventing shaking of the steel pipe.

1 is a side view showing a perforation device for a conventional multi-stage straight-forged steel pipe construction method,
FIG. 2 is a partially exploded perspective view showing the punching device for the multi-stage construction method of the straight punched steel pipe of FIG. 1,
3 is an enlarged view showing part A of FIG. 2,
4 is a partial cross-sectional view showing a perforation in which a steel pipe of the prior art is inserted,
Figure 5 is a side view showing a perforation device for a straight-forward steel pipe multi-stage construction method of the present invention,
6 is a schematic partial cross-sectional view of the steel pipe rotary joint shown to explain the sliding motion of the steel pipe adapter,
Figure 7 is a partially enlarged side view showing to explain the steel pipe separation of the perforation device for the multi-stage straight-piercing steel pipe construction method of the present invention,
Figure 8 is a partially enlarged side view showing to explain the rod separation of the punching device for the multi-stage straight-piercing steel pipe construction method of the present invention,
9 is a schematic side view illustrating a process of adding a rod and a steel pipe of the drilling device for a multi-stage straight-punching steel pipe construction method of the present invention,
10 is a schematic side view showing a stacking device for holding a steel pipe and supplying it to a drilling device for a multi-stage straight-piercing steel pipe.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the perforation apparatus and construction method for the multi-stage direct-piercing steel pipe construction method of the present invention.

Figure 5 is a side view showing a perforation device for a straight-through steel pipe multi-stage construction method of the present invention, Figure 6 is a schematic partial cross-sectional view of the steel pipe rotary joint shown to explain the sliding motion of the steel pipe adapter, Figure 7 is of the present invention It is a partially enlarged side view shown to explain the separation of steel pipes of the punching device for the multi-stage straight-perforated steel pipe construction method, and FIG. 8 is a partially enlarged side view showing to explain the rod separation of the perforating device for the multi-stage straight-forged steel pipe construction method of the present invention, 9 is a schematic side view illustrating the process of adding a rod and a steel pipe of the perforation device for a multi-stage straight-forged steel pipe construction method of the present invention, and FIG. 10 is a stacking tool that grips a steel pipe and supplies it to a perforation device for a multi-stage straight-forged steel pipe It is a schematic side view showing the device.

Hereinafter, the length direction of the base 210 is set as the'length direction', the direction toward the ground during the drilling operation is'forward', the opposite direction is'rear', and the vertical direction is'up-down direction' in FIG. , The width direction of the base 210 is described as'width direction'.

5 is a view showing a part of the punching device 200 for the multi-stage straight-piercing steel pipe construction method of the present invention is omitted, and the illustration of the vehicle coupled to the base 210 and transported and moved is omitted. The perforation device 200 for a multi-stage straight-forged steel pipe may be installed on a support or driven in a state installed on a vehicle.

As shown in FIG. 5, the drilling apparatus 200 for the multi-stage straight-punching steel pipe construction method according to the present invention includes a base 210, a moving drive part 220, a sliding part 230, and a steel pipe rotary joint 260. Wow, it consists of a rod driving part 270, a perforation part 290, an adjustment means 280, a steel pipe support part 240, and a first jockey part 251.

The base 210 is provided in the form of a rod having a length. The base 210 is made of a steel material. The base 210 has a cross-section having a flange protruding in the width direction at the top and bottom of the "I" shape, and along the base 210, a sliding part 230 is provided to reciprocate in the longitudinal direction. A protrusion-shaped base support part 211 is provided at the front end of the base 210 so as to prevent the base 210 from shaking.

The base 210 is coupled to a vehicle or a support so as to be separated and assembled. The vehicle is a vehicle used for a drilling machine or an excavator.

The moving drive unit 220 is connected to the sliding unit 230 so that the sliding unit 230 can reciprocate in the longitudinal direction. The moving drive unit 220 includes a motor (not shown), a driving sprocket 223, a driven sprocket 221, and a chain 225.

The motor is provided at the rear of the base 210.

The drive sprocket 223 is connected to the drive shaft of the motor and is installed on the base 210 so as to be rotatable.

The driven sprocket 221 is provided in the base 210 to be separated from the driving sprocket 223 in the longitudinal direction. The driven sprocket 221 is connected to a rotation shaft provided at one side in front of the base 210 and is rotatably provided.

The chain 225 is provided by winding the driving sprocket 223 and the driven sprocket 221 in a closed circuit. Due to the chain 225, the power of the motor is transmitted to the driven sprocket 221. The chain 225 is connected to the sliding part 230. Therefore, when the chain 225 moves between the driving sprocket 223 and the driven sprocket 221, the sliding part 230 is also moved together, so that the sliding part 230 reciprocates in the longitudinal direction.

As a moving driving part for moving the sliding part 230 in the longitudinal direction of the base 210, a hydraulic cylinder, a screw type actuator, or the like may be used.

The sliding part 230 is provided on the base 210. The sliding part 230 is provided on the base 210 to be slidable in the longitudinal direction. The sliding part 230 is connected to and provided with the chain 225 to enable reciprocating motion in the longitudinal direction. The sliding part 230 includes a slider 231 and an auxiliary slider 233.

The slider 231 is provided in a plate shape extending in the longitudinal direction. Concave grooves extending downwardly and facing each other on both sides of the slider 231 in the width direction extend along the length direction. Flanges on both sides of the top of the base 210 are inserted into grooves of the slider 231 facing each other to be slidable in the longitudinal direction thereof.

A slider connection part 2311 is provided under the slider 231 to be connected to the chain 225 to enable a reciprocating motion in the longitudinal direction.

The auxiliary slider 233 is provided on the slider 231. The auxiliary slider 233 is provided in front of the upper portion of the slider 231. The slider 231 is provided with flanges (not shown) extending from both ends in the width direction in the width direction. In the auxiliary slider 233, concave grooves facing each other on both sides in the width direction extend along the length direction, and flanges on both upper sides of the slider 231 are inserted into the grooves facing each other, so that the base 210 is in the slider 231 It is inserted to be slidable in the longitudinal direction of the. The auxiliary slider 233 is slidably provided on the slider 231.

The steel pipe rotary joint 260 is provided above the sliding part 230. The steel pipe rotary joint 260 is installed on the auxiliary slider 233.

6, the steel pipe rotary joint 260 includes a steel pipe rotary joint case (not shown), a steel pipe joint driving gear 265, a steel pipe joint driven gear 263, and a steel pipe rotary joint motor (not shown). City) and a steel pipe adapter 261.

The steel pipe rotary joint case is provided with a hollow body. The steel pipe rotary joint case is provided by being coupled to the auxiliary slider 233. A steel pipe joint driving gear 265, a steel pipe joint driven gear 263, and a steel pipe rotary joint motor are provided in the hollow portion of the steel pipe rotary joint case.

The steel pipe joint driving gear 265 is rotatably installed in the steel pipe rotary joint case around a driving gear shaft 2651 extending in the longitudinal direction. The steel pipe joint driving gear 265 is rotated by a steel pipe rotary joint motor installed in a steel pipe rotary joint case.

The steel pipe joint driven gear 263 is rotatably installed in the steel pipe rotary joint case and is provided in mesh with the steel pipe joint driving gear 265. The steel pipe joint driven gear 263 is provided as a hollow body. In the hollow portion of the steel pipe joint driven gear 263, an adapter coupling portion 2631 penetrating in the longitudinal direction is formed.

The steel pipe adapter 261 is provided as a hollow body extending in the longitudinal direction. The steel pipe adapter 261 is provided to penetrate the steel pipe rotary joint case in a longitudinal direction so that both ends of the steel pipe rotary joint case are exposed from the steel pipe rotary joint case. An adapter rod hole 2615 penetrated in the length direction is formed in the hollow portion of the steel pipe adapter 261. The rod adapter 277 of the rod driving part 270 is provided through the adapter rod hole 261. A steel pipe 10 is detachably connected to the front of the steel pipe adapter 261. At the rear end of the steel pipe adapter 261, an adapter latching portion 2611 protruding outward and engaging the steel pipe rotary joint case is provided.

The steel pipe adapter 261 is inserted into the adapter coupling portion 2631 of the steel pipe joint driven gear 263 to rotate integrally with the steel pipe joint driving gear 265 and slidable in the longitudinal direction.

A driving gear guide portion 2613 is formed on the outer diameter surface of the steel pipe adapter 261, and an adapter coupling portion 2631 is formed on the inner diameter surface of the steel pipe joint driven gear 263, so that the outer diameter surface of the steel pipe adapter 261 and The inner diameter surface of the steel pipe joint driven gear 263 is integrally rotated and formed in a form capable of sliding with each other in the longitudinal direction.

For example, the outer diameter surface of the steel pipe adapter 261 and the inner diameter surface of the steel pipe joint driven gear 263 may be formed in a polygonal shape (eg, pentagonal, hexagonal) as shown in FIG. 6. The outer diameter surface of the steel pipe adapter 261 and the inner diameter surface of the steel pipe joint driven gear 263 may be formed as splines that are slidable in the longitudinal direction, and a groove extending in the longitudinal direction is formed on the outer diameter surface of the steel pipe adapter 261 , It is also possible to have a structure in which a key is inserted between the outer diameter surface of the steel pipe adapter 261 and the inner diameter surface of the steel pipe joint driven gear 263.

A steel pipe adapter coupling portion 2616 is formed at a front end of the steel pipe adapter 261. The steel pipe adapter coupling portion 2617 is formed to have a front-facing jaw surface at a front end of the adapter rod hole 2615. A female thread is formed in the inner diameter of the steel pipe adapter coupling portion 2616. In front of the steel pipe adapter 261, a steel pipe male thread 11 formed at an end of the steel pipe 10 is screwed to the steel pipe adapter coupling portion 2616 and is detachably connected.

The steel pipe adapter coupling portion 2616 may be formed with a male thread on the outer diameter surface of the steel pipe adapter 261, and when the steel pipe adapter coupling portion 2616 is formed with a male thread, a female thread formed at the end of the steel pipe 10 It is connected with an additional screw and detachably.

The steel pipe 10 is provided as a hollow body. One end of the steel pipe 10 is formed with a male thread, and the other end is formed with a female thread.

The rear end of the steel pipe 10 is coupled to the front end of the steel pipe adapter 261 and provided. In the steel pipe 10, when the steel pipe adapter 261 is formed with a female thread, the male threaded portion of the steel pipe 10 is screwed to the steel pipe adapter 261 to be coupled. When the steel pipe adapter 261 is formed with a male screw, a portion of the steel pipe 10 formed with a female screw is screwed to the steel pipe adapter 261 to be coupled.

A through hole is formed laterally in the screw fastening portion of the steel pipe 10 and the steel pipe adapter 261 and a pin is inserted into the through hole to prevent the steel pipe and the steel pipe adapter 261 from being screwed loose. When a pin is provided, in order to separate the steel pipe 10 and the steel pipe adapter 261, the pin is first separated, and the steel pipe and the steel pipe adapter 261 are separated.

The rod driving part 270 includes a rod rotary joint 271, a head part 273, an injection pipe 275, and a rod adapter 277.

The rod rotary joint 271 is provided on the sliding part 230. The rod rotary joint 271 is provided in the upper and rear portions of the slider 231. The rod rotary joint 271 is provided above the sliding part 230 and reciprocates along with the sliding part 230 in the longitudinal direction. The rod rotary joint 271 is provided by being connected to an end of a rod adapter 277 to which the rod 20 is connected to the head portion 273. The rod rotary joint 271 is provided with a motor for rotating the rod adapter 277.

The head portion 273 is provided on the upper portion of the slider 231 to the rear of the rod rotary joint 271. The head portion 273 is provided above the slider 231 and reciprocates along with the sliding portion 230 in the longitudinal direction. A rod adapter 277 to which the rod 20 is connected is connected to the head portion 273. The head portion 273 provides power required for drilling. The head 273 includes a vibrator and a motor to transmit vibration and rotational force to the rod 20.

The injection pipe 275 is provided as a tube body. One side of the injection pipe 147 is connected to the rod rotary joint 271 and the other side is connected to a discharge water injection device (not shown). The injection pipe 275 is provided with a valve (not shown) for controlling the inflow of discharged water. Drained water flows into the rod rotary joint 271 through the injection pipe 275. The discharged water introduced into the rod rotary joint 271 is discharged by moving through the inner hollow of the rod 20 to the perforated portion 290 where perforation is made. The discharged water is discharged to the outside together with the sludge generated during drilling.

The rod adapter 277 is provided as a hollow body extending in the longitudinal direction. The rod adapter 277 is connected to the rod rotary joint 271 and provided in front of the rod rotary joint 271. At the front end of the rod adapter 277, a female thread is formed on the inner surface or a male thread is formed on the outer surface. The rod 20 is detachably connected to the front end of the rod adapter 277. The rod adapter 277 is connected to a motor provided in the rod rotary joint 271 to be rotated, and the rod 20 connected to the rod adapter 277 is also rotated.

The rod 20 is It is equipped with a hollow body. The rod 20 is provided to be parallel to the base 210. The rod 20 is provided to be inserted into the inside of the steel pipe 10, and the outer diameter of the rod 20 is formed smaller than the inner diameter of the steel pipe 10. One end of the rod 20 is formed with a male thread, and the other end is formed with a female thread. Accordingly, one end of the rod 20 and the other end of the other rod 20 are connected by screwing.

The rear end of the rod 20 is coupled to the front end of the rod adapter 277 and provided. When the rod adapter 277 is formed of a female screw, the rod 20 is coupled by screwing the male screw portion of the rod 20 to the rod adapter 277. When the rod adapter 277 is formed with a male screw, a portion of the rod 20 formed of a female screw is screwed to the rod adapter 277 to be coupled. At this time, the rod 20 and the steel pipe 10 are fastened so that the fastening directions are opposite to each other.

A through hole is formed laterally in the screw fastening portion of the rod 20 and the rod adapter 277 and a pin is inserted into the through hole to prevent the rod 20 and the rod adapter 277 from being screwed loose. When a pin is provided, in order to separate the rod 20 and the rod adapter 277, the pin is first separated, and the rod 20 and the rod adapter 277 are separated.

The rod rotary joint 271 and the steel pipe rotary joint 260 are connected to the rod adapter 277 and the rod 20 when drilling using the multi-stage drilling device 200 according to the present invention, and the steel pipe 10 ) And the steel pipe adapter 261 are rotated in the fastened direction. Therefore, when drilling, both the rod 20 and the steel pipe 10 rotate and rotate in opposite directions.

As the steel pipe 10 rotates in a direction opposite to the rotation direction of the rod 20, peripheral frictional force is reduced to facilitate perforation, and resistance force due to rotation is canceled to improve straightness.

A perforation 290 is provided at the front end of the rod 20 and the steel pipe 10. The perforation part 290 includes a pilot bit (not shown), a ring bit (not shown), and a casing shoe (not shown). The perforation portion 290 is described as 160 in Korean Patent Registration No. 10-1804854, so detailed description thereof will be omitted.

The pilot bit is provided at the front end of the rod 20. The pilot bit has an outer diameter smaller than the inner diameter of the steel pipe 10 so that the pilot bit can be inserted into the steel pipe 10. In the pilot bit, a drain hole communicating with the inner hollow of the rod 20 is formed to communicate with the outside through the front surface. The pilot bit rotates integrally with the rod 20.

The ring bit is coupled to the pilot bit so as to be detachable while rotating at the front end of the pilot bit. The coupling of the pilot bit and the ring bit is described in Korean Laid-Open Patent Publication No. 10-2012-0034432 with reference to FIGS. 4 and 5.

The casing shoe is provided in a ring shape and coupled to the front end of the steel pipe 10. The pilot bit is provided so as to hang forward on the casing shoe. When the rod 20 is pressed forward, the casing shoe is pressed by the pilot bit and the steel pipe 10 is also pressed forward.

The adjusting means 280 is provided between the rod rotary joint 271 and the steel pipe rotary joint 260. The adjusting means 280 has one end connected to the rod rotary joint 271 and the other end connected to the steel pipe rotary joint 260. The adjustment means 280 may be a driving cylinder. The adjusting means 280 may be provided as a driving cylinder, and one end may be connected to the auxiliary slider 233 and the other end may be connected to the slider 231. The adjusting means 280 serves to adjust the distance between the steel pipe rotary joint 260 and the rod rotary joint 271.

The steel pipe support part 240 is provided on the base 210. The steel pipe support part 240 is provided at the front end of the base part 210. The steel pipe 10 is inserted into the steel pipe support part 240 so as to be slidably moved in the longitudinal direction to support the front end of the steel pipe 10. The presence of the steel pipe support part 240 prevents sagging of the steel pipe 10 during drilling. As the steel pipe support part 240, the fixing part 170 described by reference numeral 170 in Korean Patent Registration No. 10-1804854 may be used, and a detailed description thereof is described, so a description thereof will be omitted.

The first jockey part 251 is spaced rearward from the steel pipe support part 240 and is provided in the base 210. The first jockey part 251 is provided to be spaced forward from the sliding part 230. The first jockey part 251 serves to grip and fix the steel pipe 10.

The second jockey portion 253 is spaced rearward from the first jockey portion 251 and is provided on the base 210 between the sliding portion 230 and the first jockey portion 251. The second jockey part 253 serves to grip or grip and rotate the steel pipe 10 or the rod 20. The second jockey part 253 unscrews the steel pipe 10 and the steel pipe adapter 261 screwed to the steel pipe 10 through the action of gripping and rotating the steel pipe 10 or the rod 20, The coupling between the rod 20 and the rod 20 and the rod adapter 277 screwed to the rod 20 and the rod 20 are unscrewed.

Hereinafter, a construction method using the multi-stage drilling system 200 according to the present invention will be described.

First, as shown in FIG. 7, after placing the straight-through steel pipe multi-stage drilling device 200 on the ground, for example, the steel pipe 10 and the rod coupled to the steel pipe adapter 261 by the moving drive unit 220 The rod 20 coupled to the adapter 277 moves forward, the steel pipe 10 rotates by driving a steel pipe rotary joint motor, and the rod 20 is the head 273 and the rod rotary joint. The ground G is perforated through vibration and rotation in the forward and backward directions by the driving force provided by the motor provided in the 271. At this time, a perforation 290 is provided at the front end of the steel pipe 10 and the rod 20.

The coupling of the rear end of the steel pipe 10 to the steel pipe adapter 261 is maintained, and the rotation direction of the rod 20 by the rod rotary joint 271 and the rotation direction of the steel pipe by the steel pipe rotary joint 260 are opposite directions. And, a sliding relative motion occurs in the longitudinal direction between the steel pipe joint driven gear 263 and the steel pipe adapter 261 due to the vibration added by the head portion 273.

A sliding relative motion occurs in the longitudinal direction between the steel pipe joint driven gear 263 and the steel pipe adapter 261, so that the impact caused by the driving of the head portion 273, which has been generated in the prior art, is prevented from being transmitted to the steel pipe 10. It works.

In FIG. 7, reference numeral GH denotes a ground perforation drilled by the multi-stage perforation device 200 for a straight-perforated steel pipe.

The steel pipe 10 is perforated until the screwed portion of the steel pipe 10 and the steel pipe adapter 261 is positioned between the first jockey portion 251 and the second jockey portion 253 as shown in FIG. 7. This is done.

After the ground (G) is drilled, it further comprises a steel pipe rod adding step of adding the steel pipe 10 and the rod 20 to the rear end of the steel pipe 10 and the rear end of the rod 20.

The steel pipe rod addition step includes a steel pipe adapter separation step, a steel pipe rotary joint retreat step, a rod end gripping step, a rod loosening step, a sliding part retracting step, an additional steel pipe rod supply step, a rod connecting step, and a steel pipe connecting step.

In the step of separating the steel pipe adapter, after the screwed portion of the steel pipe 10 and the steel pipe adapter 261 is positioned between the first jockey part 251 and the second jockey part 253, the steel pipe rotary joint 260 or The screw fastening between the steel pipe 10 and the steel pipe adapter 261 is released by the second jockey part 253.

When the screw connection is released by the steel pipe rotary joint 260 in the steel pipe adapter separating step, the rear end of the steel pipe 10 is gripped by the first jockey part 251, and the steel pipe rotary joint 260 becomes a steel pipe adapter 261. ), the screw connection between the steel pipe 10 and the steel pipe adapter 261 is released.

When the screw fastening is released by the second jockey part 253, the second jockey part 253 grips the steel pipe adapter 261 to initially rotate in the loosening direction, and the gripping of the second jockey part 253 is released. As the steel pipe rotary joint 260 rotates in the loosening direction, the screw connection between the steel pipe 10 and the steel pipe adapter 261 is released.

At this time, the steel pipe adapter 261 rotates integrally with the steel pipe joint driven gear 263, and slides backward in the length direction within the steel pipe joint driven gear 263 by loosening while the steel pipe adapter 261 rotates. Since the steel pipe 10 and the steel pipe adapter 261 may be separated by the sliding movement of the steel pipe adapter 261, there is no need to retreat the sliding part 230. Accordingly, since the positions of the steel pipe 10 and the rod 20 are maintained as they are, the ring bit and the pilot bit provided in front of the steel pipe 10 and the rod 20 do not need to be separated.

After the step of separating the steel pipe adapter, a step of retreating the steel pipe rotary joint in which the steel pipe rotary joint 260 retreats to the rear is performed.

In the steel pipe rotary joint retreating step, when the adjusting means 280 (for example, a driving cylinder) contracts and the steel pipe rotary joint 260 retreats toward the rod rotary joint 271, the steel pipe 10 and the steel pipe adapter 261 are separated from each other. Then, a connection portion of the rod adapter 277 connected to the end of the rod 20 in the steel pipe 10 is exposed between the steel pipe 10 and the steel pipe adapter 261 as shown in FIG. 8.

After the steel pipe rotary joint retreating step, the rear end of the rod 20 is gripped by the second jockey part 253 (the rod end gripping step), and the rear end of the rod 20 with the second jockey part 253 The rod rotary joint 271 rotates while the end is gripped to release the screw connection between the rod 20 and the rod adapter 277, and the screw connection is released (rod loosening step).

After the rod unwinding step, the sliding unit 230 is retracted by the operation of the moving drive unit 220 so that the distance between the rear end of the steel pipe 10 and the steel pipe adapter 261 is separated by more than the length of one steel pipe (sliding unit Retreat stage).

Then, as shown in Fig. 9(a), the steel pipe 10 and the steel pipe adapter 261 spaced apart from each other by holding the steel pipe 10 into which the rod 20 is inserted by the stacking device 300 It is supplied through (steel pipe rod additional supply step). The additionally supplied rod 20 causes the end of the additionally inserted steel pipe 10 to protrude rearward.

While holding the rod 20 protruding to the rear of the steel pipe 10 (with a hand, etc.), the rod rotary joint 271 is rotated while advancing the sliding part 230, and an additional rod 20 is added to the rod adapter 277. ) Is screwed, and in this state, as shown in FIG. 9(b), the slangding part 230 advances so that the front end of the additional rod 20 is gripped by the second jockey part 253. The screw of the rod 20 and the additional rod 20 held by the rod 20 and the rod adapter 277 and the second jockey part 253 added by rotating the rod rotary joint 271 and approaching the rear end The fastening is completed (rod connection step). In addition, the second jockey part 253 releases the grip of the rod 20.

After the rod 20 and the additional rod 20, the additional rod 20 and the rod adapter 277 are screwed and connected, the steel pipe rotary joint 260 advances by the adjusting means 280 and the steel pipe rotary joint ( 260) is rotated so that the rear end of the additional steel pipe 10 and the steel pipe adapter 261 are screwed (refer to FIG. 9(c)), and the steel pipe rotary joint 260 further advances by the adjustment means 280 and the additional steel pipe The front end of (10) passes through the second jockey portion 253 and is close to the rear end of the steel pipe 10 held by the first jockey portion 251 (see Fig. 9(d)), and the steel pipe rotary joint motor is By rotating, screwing of the steel pipe adapter 261 and the additional steel pipe 10, the additional steel pipe 10 and the steel pipe 10 gripped by the first jockey part 251 is completed (steel pipe connection step).

Hereinafter, a rod withdrawal step of drilling to a set depth while adding the steel pipe 10 and the rod 20 and pulling out the rod 20 after the drilling operation will be described.

The rod withdrawal step includes a steel pipe adapter separating step, a rod exposing step, a bit separating step, a second rod exposing step, a rod first separating step, a rod second separating step, and a rod removing step, the Steps take place one after another. After the rod removal step, when the rod 20 remains in the steel pipe 10, a rod coupling step is further included.

In the step of separating the steel pipe adapter, the first jockey part 251 grips the rear end of the steel pipe 10 and the second jockey part 253 grips the steel pipe adapter 261 so that the steel pipe 10 and the steel pipe adapter 261 are The screw connection is released, the grip of the second jockey part 253 is released, and the steel pipe 10 and the steel pipe adapter 261 are separated by rotation of the steel pipe rotary joint 260.

In the step of separating the steel pipe adapter, the rear end of the steel pipe 10 is gripped by the first jockey part 251, and the steel pipe rotary joint 260 rotates in the unwinding direction of the steel pipe 10 and the steel pipe adapter 261. ) May be unscrewed.

In the rod exposure step, the steel pipe rotary joint 260 is retracted toward the rod joint cylinder 271 by the operation of the adjusting means 280, and the rear end of the rod 20 between the steel pipe 10 and the steel pipe adapter 261 The connection portion of the front end of the rod adapter 277 is exposed.

In the bit separation step, the rod rotary adapter 271 rotates in a direction in which the ring bit and the pilot bit are separated, and the ring bit and the pilot bit are separated by the rotation.

In the second rod exposure step, the sliding part 230 is retracted to the rear by the operation of the moving drive unit 220 to expose the rear end of the rear second rod 20 to the rear end of the steel pipe 10.

In the first separation step of the rod, the rear end of the rear second rod 20 is gripped by the second jockey part 253, and the rod rotary joint 271 is rotated to between the rod 20 and the rear second rod 20. Remove the screw connection.

At this time, in the case where a through hole is formed laterally in the screwed portion of the rod 20 and the rod adapter 277, a pin is inserted into the through hole to prevent screwing of the rod 20 and the rod adapter 277, By rotating the rod rotary joint 271, the screw connection between the rod 20 and the rear second rod 20 is separated.

In the second separation step of the rod, the rod rotary joint 271 is moved forward again while the screw connection between the rod 20 and the rear second rod 20 is separated, so that the front end of the rod 20 becomes the second jockey part. 253 and the first jockey part 251, the second jockey part 253 grips the front end of the rod 20 and rotates the rod rotary joint 271 Separate the rear end and the rod adapter 277.

When a pin is inserted between the rod 20 and the rod adapter 277, the front end of the rod 20 is gripped by the second jockey part 253, the pin is removed, and the rod rotary joint 271 is rotated. The rear end of the rod 20 and the rod adapter 277 are separated.

In the rod removal step, the rod adapter 277 and the separated rod 20 are gripped by the stacking device 300 and removed.

After the rod removal step, when the rod 20 remains in the steel pipe 10, the sliding part 230 advances by the operation of the moving drive unit 220 and is located in the steel pipe 10, and the rear end is exposed. (20) A rod coupling step is performed in which the rod 20 and the rod adapter 277 are coupled to each other by approaching the end of the rod (which was the second rod in the rear) and rotating the rod rotary joint 271.

In the rod coupling step, when a through hole is formed laterally in the screwed portion of the rod 20 and the rod adapter 277, a pin is inserted into the through hole to prevent screw loosening of the rod 20 and the rod adapter 277 do.

After the rod coupling step, a second rod exposure step, a rod first separating step, a second rod separating step, and a rod removal step are sequentially performed, and a rod coupling step until the last rod 20 is withdrawn, a second rod exposure The step, the first rod separation step, the second rod separation step, and the rod removal step are repeated, and the plurality of rods 20 are sequentially withdrawn.

Hereinafter, the stacking device 300 will be described.

The stacking device 300 is a device that grips the steel pipe 10 with the rod 20 inserted therein so that the additional rod 20 and the steel pipe 10 are connected to each other, and provides between the steel pipe and the steel pipe adapter 261 spaced apart from each other. to be. It is also possible to use the stacking device 300 to grip and remove the rod 20 or the steel pipe 10 drawn out after completion of the drilling operation.

The stacking device 300 includes a fixed tank 301, a driving tank 303, a rotating body 309, a main body 313, a driving tank cylinder 305, a fixed tank cylinder 307, and rotating. It includes a cylinder 311.

The body portion 313 is coupled to the vehicle, and the gripped object is transported.

The fixing tank 301 is a concave curved fixing tank 3011 for gripping an object such as a steel pipe 10 or a rod 20 together with the driving tank 303, and a fixing extending from the end of the fixing tank 3011. It includes an auxiliary extension part 3013. The fixed jaw extension portion 3013 is bent and extended at an end of the fixed jaw portion 3011. The drive tank 303 has one end portion rotatably connected to the fixed tank 301 in a concave curved shape. The driving tank 303 is rotatably connected to the bent portion of the fixed tank 301 by a clamping hinge portion 304. Reference numeral 3031 denotes a driving jaw pad attached to the inner surface of the driving tank 303, and 3012 denotes a fixed jaw pad attached to the inner surface of the fixed jaw portion 3011. It is preferable that the driving jaw pad 3031 and the fixed jaw pad 3012 are made of an elastic material (eg, rubber) having a large coefficient of friction.

The driving jaw cylinder 305 is spaced apart from the clamping hinge portion 304 on one side and rotatably connected to the fixed auxiliary extension portion 3013, and the other side is spaced apart from the tightening hinge portion 304 and rotatably connected to the driving jaw 303. Due to the expansion and contraction of the driving tank cylinder 305, the driving tank 303 rotates the tightening hinge part 304 about the rotational center to grip or release the steel pipe 10 together with the fixed tank part 3011. It is possible to install a fixing aid 2 bracket 3017 protruding toward the driving tank 303 in the fixing aid extension part 3013, and the driving jaw cylinder 305 can be rotatably installed on the fixing aid 2 bracket 3017.

One end of the rotating body 309 is rotatably connected to an end of the fixed joint extension 3013 by a fixed joint hinge part 306.

The fixed jaw cylinder 307 has one side spaced apart from the fixed jaw hinge portion 306 and rotatably connected to the fixed jaw extension portion 3013, and the other side is spaced apart from the fixed jaw hinge portion 306 and rotatable to the rotating body 309 Is connected. It is installed on the fixing aid 1 bracket 3015 protruding laterally from the fixed auxiliary extension part 306, and the main body bracket 3091 protruding in the same direction is installed on the rotating body 309, and the fixed tank cylinder 307 One side may be rotatably connected to the fixing aid 1 bracket 3015, and the other side may be rotatably connected to the body bracket 3091.

The rotating body 309 is rotatably connected to the main body 313 by a rotating cylinder 311.

The stacking device 300 grips the steel pipe 10 and can rotate in an up-down direction and a pivot direction, so that the inclination and position of the steel pipe 10 can be adjusted.

So far, the straight-forward steel pipe multi-stage drilling apparatus and construction method according to the present invention have been described with reference to the embodiments shown in the drawings, but this is only exemplary, and anyone skilled in the art can perform various modifications and equivalent other embodiments from this. You will understand that Therefore, the true technical protection scope should be determined by the technical spirit of the appended claims.

200: punching device for multi-stage construction of straight-punched steel pipes
210: base 220: moving drive unit
230: sliding part 240: steel pipe support
260: steel pipe rotary joint 270: rod driving part
280: adjustment means 290: perforation

Claims (7)

A rod-shaped base 210 having a length, a sliding part 230 provided on the base 210 to be movable in the longitudinal direction, and a sliding part 210 provided on the base 210 in the longitudinal direction A steel pipe rotary joint 260 having a movable drive unit 220 for reciprocating motion in a reciprocating motion, and a steel pipe adapter 261, which is provided in the sliding unit 230 and is a hollow steel pipe 10 to which the steel pipe 10 is detachably connected, and the sliding unit A first jockey part 251 that is spaced forward from 230 and is provided in the base 210 to grip the steel pipe 10, and a sliding part 230 which is spaced rearward from the first jockey part 251 ) And the first jockey portion 251 provided in the base 210 and gripped and rotated between the second jockey portion 253, and the sliding portion 230 spaced rearwardly from the steel pipe rotary joint 260 And a rod rotary joint 271 having a rod adapter 277 to which the rod 20 is detachably connected;
One or more steel pipes including a steel pipe 10 with a casing shoe coupled to the front end are coupled to the steel pipe adapter 261, and a pilot bit is provided at the front end and including a rod 20 inserted into the steel pipe 10 The above rod 20 is provided, and the rod 20 passes through the steel pipe adapter 261 and is coupled to the rod adapter 277, and a ring bit is coupled to the pilot bit so as to be detachable while rotating at the front end of the pilot bit. ;
The sliding part 230 includes a slider 231 provided on the base 210 to be movable in the longitudinal direction thereof, and an auxiliary slider 233 provided on the slider 231 to be movable in the longitudinal direction of the base 210 );
The steel pipe rotary joint 260 is installed on the auxiliary slider 233, and the rod rotary joint 271 is installed on the slider 231, and the interval between the steel pipe rotary joint 260 and the rod rotary joint 271 is adjusted. Straight-through steel pipe multi-stage drilling device 200, characterized in that the adjustment means 280 is provided. According to claim 1, wherein the steel pipe rotary joint 260 includes a steel pipe rotary joint case coupled to an auxiliary slider 233, a steel pipe joint driving gear 265 rotatably installed in the steel pipe rotary joint case, and the steel pipe A steel pipe joint driven gear 263 that is rotatably installed in the rotary joint case and meshes with the steel pipe joint driving gear 265, and a steel pipe rotary joint motor that is installed in the steel pipe rotary joint case to rotate the steel pipe joint driving gear 265. Includes;
The steel pipe joint driven gear 263 is a hollow body, and the steel pipe adapter 261 rotates integrally with the steel pipe joint driven gear 263 and is inserted into the steel pipe joint driven gear 263 so as to be slidable in the longitudinal direction; A straight punched steel pipe multi-stage drilling device 200, characterized in that the rear end of the steel pipe 10 is coupled to the front end. According to claim 2, The steel pipe adapter (261) It is characterized in that it protrudes outward from the rear end of the steel pipe rotary joint case, and includes an adapter engaging portion (2611), characterized in that it comprises a multi-stage drilling system for straight-through steel pipes (200). The straight-perforated steel pipe according to claim 3, further comprising a head part (273) provided in the slider (231) to the rear of the rod rotary joint (271) and for applying vibration to the rod (20) forward. Multi-stage drilling system (200). In the construction method according to claim 4 using the multi-stage drilling system for straight-through steel pipes;
The coupling of the rear end of the steel pipe 10 to the steel pipe adapter 261 is maintained, and the rotation direction of the rod 20 by the rod rotary joint 271 and the rotation direction of the steel pipe by the steel pipe rotary joint 260 are opposite directions. , In the described straight-through steel pipe multi-stage drilling system, characterized in that a sliding relative motion occurs in the longitudinal direction between the steel pipe joint driven gear 263 and the steel pipe adapter 261 by vibration added by the head portion 273 By construction method. According to claim 5, The steel pipe rod adding step of adding the steel pipe (10) and the rod (20) to the rear end of the steel pipe (10) and the rear end of the rod (10) is further included;
In the step of adding the steel pipe rod, the steel pipe 10 and the steel pipe adapter 261 are rotated in the unwinding direction by gripping the rear end of the steel pipe 10 in the first jockey part 251 and rotating the steel pipe rotary joint 260 in the unwinding direction. ), and the steel pipe adapter separating step in which the screw connection of) is released, and in the steel pipe adapter separating step, the steel pipe adapter 261 is rotated and slid back in the steel pipe joint driven gear 263 by loosening. Construction method by means of a multi-stage drilling system for straight drilling steel pipes. The method according to claim 6, further comprising a rod withdrawing step of drilling to a set depth while adding the steel pipe (10) and the rod (20), and pulling out the rod (20) after the drilling operation;
In the rod withdrawal step, a screw of the steel pipe 10 and the steel pipe adapter 261 is held by gripping the rear end of the steel pipe 10 by the first jockey portion 251 and the steel pipe adapter 261 by the second jockey portion 253 A steel pipe adapter separating step in which the fastening is released, the grip of the second jockey part 253 is released, and the steel pipe 10 and the steel pipe adapter 261 are separated by rotation of the steel pipe rotary joint 260;
By the operation of the adjusting means 280, the steel pipe rotary joint 260 is retracted toward the rod joint cylinder 271, and the rear end of the rod 20 and the rod adapter 277 between the steel pipe 10 and the steel pipe adapter 261 A rod exposure step in which the connection portion of the front end of the is exposed,
A bit separation step in which the ring bit and the pilot bit are separated by rotation of the load rotary adapter 271,
A second rod exposure step of exposing the rear end of the rear second rod 20 to the end of the steel pipe 10 by retreating the sliding unit 230 by the operation of the moving drive unit 220;
The rear second rod 20 is gripped by the second jockey part 253 and the rod rotary joint 271 is rotated to separate the screw fastening of the rear end of the rear second rod 20 and the front end of the rod 20 The rod first separation step and,
In the separated state, advance again to grip the rear end of the rod 20 with the second jockey part 253 and rotate the rod rotary joint 271 to separate the rear end of the rod 20 and the rod adapter 277. The rod second separation step,
A rod removal step of gripping and removing the rod 20 with the stacking device 300,
By the operation of the moving drive unit 220, the sliding unit 230 moves forward, is located in the steel pipe 10, and the end is close to the end of the rod 20 (the rod that was the second rod in the rear), and the rod rotary joint 271 ) Is rotated and the rod coupling step in which the rod 20 and the rod adapter 277 are coupled is repeated, so that the plurality of rods 20 are sequentially drawn out.

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