KR101072231B1 - Diameter variable type reamer for horizontal directional drilling - Google Patents

Abstract

Disclosed is a variable diameter directing horizontal digging machine. According to one embodiment of the invention, the driving rod connected to the excavating equipment is connected to the front end is provided with a conical head for receiving rotational force, is formed to protrude a plurality of tips on the front of the head, from the head to the rear Each of the through-holes is formed with a plurality of expansion cover is formed in a cylindrical straight body, and a plurality of perforating heads are formed around the center of rotation at the head, each of which is mounted in a plurality so as to be separated from the inside of the expansion cover, each hitting head reciprocating A hammer installed to face forward through the drive, an actuator for driving the hammer and detachable from the expansion cover, and a variable height so that each hammer is fixed by varying the position in the radial direction relative to the rotation center of the drive rod Include the government.
According to the present invention, as well as the general soil layer, rock layer or amber stone to easily split and break up so that the expansion speed is fast to make the work of the pipeline construction quickly, even if the diameter of the expansion hole is changed through the replacement of the expansion cover only, It is possible to vary the diameter of the expander to correspond to the diameter of the different expansion holes, thereby reducing the cost of expanding the air.

Description

DIAMETER VARIABLE TYPE REAMER FOR HORIZONTAL DIRECTIONAL DRILLING}

The present invention relates to expansion of an excavation hole, and more particularly, to an expander for use in a directional horizontal excavation hole having a variable diameter.

In general, when installing various pipelines such as water pipes, gas pipes, and the like, first, the ground is excavated to form an underground track, and an unattached oriented horizontal excavation method is used in which underground pipes are inserted and embedded.

Conventional directional horizontal excavation method by drilling a small diameter drill header to the front to drill a pipeline, by drilling a mixture of water and bentonite in a high pressure direction through a nozzle formed in the drill header to drill small diameter excavation Allow the ball to dig.

The equipment used in this directional horizontal excavation method consists of a self-engine, excavation track, rod mounting and demounting device, the main equipment is connected to the length required for the rod, and the excavation and expansion at the outer end of the rod The drill header and expander are each selectively connected, providing torque and propulsion from the main machine.

The drill header is an excavation tool connected to the tip of the rotating drive rod, and a bit with a plurality of tips is installed on the front, and it is excavated while rotating to excavate a water caliber pipe, and a mixture of high-pressure water and bentonite is sprayed simultaneously. To increase the digging force.

The expansion machine is connected to the tip of the driving rod by replacing the drill header, and is a tool for expanding the pipe while driving backwards, and has a conical body with a sharp shear, and consists of a rotary propellant equipped with a plurality of tips on the front.

As described above, when the small-diameter pipe hole is excavated by the small-diameter drill header, the directional horizontal excavation method separates the drill header from the end of the driving rod drawn out to the opposite side, and connects the expander to the driving rod instead of the drill header. By pulling, the retractor with the rotational force is reversed while expanding the small diameter conduit, and the retractor is hung by pulling the pipes together or inserting the pipes separately after the expansion.

Referring to the expansion method according to the conventional air expansion with reference to the accompanying drawings as follows.

1 is a view showing a method for expanding by air according to the prior art.

As shown in FIG. 1, the conventional air expander 1 is formed in a conical shape, and a plurality of tips are mounted on the front surface thereof, and a hole is drilled into the small diameter drilling hole A while rotating by the driving rod 2. Excavate to expand into large diameter expansion hole (B).

However, since the conventional air expander 1 is simply provided with a plurality of tips in the head, it is easy to expand the general soil excavation hole. However, in the process of progress, the rock layer, the stone layer or the amber mixed with these tips are only rock layers. Work is not easy because it does not have the ability to propel it, which has the problem of increasing air and cost.

In addition, the conventional air expander (1) is made of a conical shape has an inclined shape as a whole to flow in the excavation hole (A). That is, when the air expander 1 moves along a curved path along the excavation hole A, the overall shape of the air expander 1 has a problem that the tip is lifted or tilted to flow by having a conical inclined shape. there was. Therefore, it is easy to lift the head toward the pull in the curved excavation hole to leave the track, so that the course of the excavation hole is changed, and the work is delayed.

In addition, the conventional expansion machine (1) is easy to widen the small diameter because the body is short, except for the conical shape, but the compaction force of the widened excavation hole is weak, and the rear expansion hole is passed through the expansion machine (1) There was a problem that would cause collapse.

In addition, since the diameter of the conventional air expander 1 is fixed, the entire air expander 1 must be replaced every time the diameter of the expansion hole is changed, which causes a problem of generating a large cost.

In order to solve the conventional problems as described above, the present invention proposes a variable diameter direct-oriented horizontal excavation air expander that can be propelled while the soil layer, as well as the rock layer, the rock layer and amber stone, etc. when meeting them will be.

In addition, the present invention to solve the shortcomings of the change of the track by improving the construction equipment to perform a quick and accurate expansion work to improve the work efficiency, reduce the risk of collapse of the expansion hole passed through the expansion, and to form a solid expansion hole The present invention proposes a variable diameter directing horizontal drilling rig.

In addition, the present invention, when changing the diameter of the expansion hole, by varying the diameter of the expander to correspond to the diameter of the different expansion holes to reduce the cost of the replacement of the expansion variable direct directional horizontal drilling rig expansion I would suggest air.

Still other objects of the present invention will be readily understood through the following description of the embodiments.

In order to achieve the above object, according to an aspect of the present invention, in the directional horizontal drilling dilator, the head of the conical shape for receiving a rotational force is provided by the driving rod connected to the drilling equipment is connected to the tip Is formed to protrude a plurality of tips on the front of the head, the expansion cover which is formed of a straight body of the cylindrical body from the back to the back, and a plurality of mounted so as to be removable inside the expansion cover, reciprocating back and forth A hammer installed to move forward through each of the through-holes formed in a plurality around the center of rotation at the head, an actuator for driving the hammer and detachable from the expansion cover; Each of the hammers is fixed by varying a position in a radial direction with respect to the rotation center of the driving rod. And a variable fixing portion to allow the hammer to be variable in position by the variable fixing portion so that the hammer can be mounted on another expansion cover to be replaced with a different diameter. A variable diameter directional horizontal drilling rig expander is provided.

The expansion cover may include a base plate detachably fixed to the rear end by a bracket.

The hammer is formed so that the tip of the hitting head has the same inclined surface as the inclination of the head portion, it may be installed at equal intervals along the circumference of the center of rotation in the air expander.

The actuator may be made of a mud pump operated by a mixture of water and bentonite supplied from the driving rod and providing a pumping force to drive the hammer.

A distribution module installed in a supply pipe for supplying the mixture from the driving rod to the mud pump, for supplying the mixture to each of the hammers through a distribution pipe, and a mixture supplied from the distribution module through the distribution pipe. It may include a discharge hole formed in the striking head to be sprayed forward.

The actuator may include an air chamber for supplying each of the hammers with pneumatic pressure supplied from an external pneumatic supply unit through a pneumatic line.

The variable fixing part is made up of a plurality so as to be installed on each of the hammers, each of the supply pipe for supplying a mixture of water and bentonite and a pair of link members, the ends of which are respectively fixed to overlap the body of the hammer, and the link member Sliding holes extending along each longitudinal direction, and may include a fixing bolt and a fixing nut for fixing the link member to each other through the sliding holes.

According to the present invention, the diaphragm for horizontal variable drilling rigs according to the present invention can be made continuously by the strong vibration impact and the impact action of the hammer installed on the front of the air expander, and further, the water and bentonite in the exposed hole of the impact head. By continuously spraying forward, it is easy to split and break rock layers or amber stones as well as general soil layers, so that the expansion speed is fast and the work of pipeline construction is made quickly.

In addition, according to the present invention, the diaphragm for horizontal tunable horizontal drilling cavities, lengthened except for the conical shape in the dilator so that the widened conduit so as not to collapse, to form a solid soil pipe, to suppress the flow of the dilator Excavation moves along the excavation hole without changing or leaving tracks, so that the expansion operation can be performed quickly and accurately.

In addition, according to the present invention, the diaphragm-type horizontal drilling machine expander according to the present invention, even if the diameter of the expansion hole is changed by changing only the expansion cover, by varying the diameter of the expander to correspond to the diameter of the different expansion holes It has the advantage of reducing the cost of replacing the air expander.

1 is a view for explaining a method for expanding by air according to the prior art,
Figure 2 is a perspective view showing a dilator of the variable diameter direct-oriented horizontal excavation construction according to the present invention,
Figure 3 is a cross-sectional view showing a dilator of the variable diameter direct-oriented horizontal excavation construction according to the present invention,
Figure 4 is a perspective view showing a variable fixing portion of a diameter-directed horizontal drilling rig expansion air according to the present invention,
Figure 5 is a cross-sectional view showing another example of a diameter-directed horizontal drilling rig expansion air according to the present invention,
Figure 6 is a front view for explaining the diameter change of the variable diameter direct-oriented horizontal excavation aerial expansion machine according to the present invention,
7 is a cross-sectional view showing yet another example of a variable diameter direct-oriented horizontal excavation aerial expansion machine according to the present invention,
8 is a flowchart illustrating a directional horizontal excavation expansion method according to the present invention,
9 is a view for explaining a directed horizontal excavation expansion method according to the present invention.

As the inventive concept allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood in a way that includes all changes, equivalents, and substitutes included in the spirit and scope of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, and the same or corresponding components will be given the same reference numerals regardless of the reference numerals, and redundant description thereof will be omitted.

Figure 2 is a perspective view showing a variable diameter directional horizontal excavation aerial expansion machine according to the present invention, Figure 3 is a cross-sectional view showing a variable diameter directional horizontal excavation aerial expansion machine according to the present invention.

As shown in Figures 2 and 3, the diameter-variable directional horizontal excavation hollow air expansion machine 100 in accordance with the present invention is the expansion cover 120 and the expansion cover 120, the drive rod 110 is connected to the tip It may include a hammer 130 installed in the actuator, an actuator for driving the hammer 130, and a variable fixing unit 160 for varying the fixed position of the hammer 130.

The expansion cover 120 is provided with a conical head portion 121 for receiving a rotational force by being connected to the distal end of the driving rod 110 connected to the excavation equipment, a plurality of tips 122 in front of the head 121 It is formed to protrude, and the cylindrical straight body 124 toward the rear from the head 121 forms an integral. Here, the tip 122 may be formed to form a plurality of rows in the longitudinal direction on the front of the head 121. In addition, the linear body 124 is molded while compacting the expansion hole expanded by the head 121 so that the expansion hole does not collapse, and has a straight length to some extent to be in close contact with the inner wall surface of the expansion hole head 121 Of course, while preventing the flow of the expansion cover 120 as a whole, to eliminate the fear of changing the track.

The expansion cover 120 may include a base plate 125 detachably fixed to the bracket 126 fixed to the fastening bolt 127 at the rear end.

The hammer 130 is mounted in a plurality so as to be separated inside the expansion cover 120, each of the hitting head 131 reciprocating forward and backward through the head 121 is formed in a plurality around the center of rotation It is installed to face forward through each of the holes 123, the inner side of the body 132 is isolated by the reciprocating piston 133 has a space isolated on both sides, the fluid for operation is supplied to one space The head 131 is installed to reciprocate in the other space.

Hammer 130 is formed so that the tip of the striking head 131 has the same slope as the inclination of the head 121, may be installed at equal intervals along the circumference of the center of rotation in the expansion cover 120, Not only four is installed as in the embodiment, the number can vary depending on the diameter of the excavation hole or the composition and hardness of the ground. Here, the striking head 131 may be formed in a flat plate shape or a pointed nail shape like an ax blade in order to increase the efficiency and ease of striking. As such, by forming the inclined surface of the striking head 131, it is possible to have a striking effect while reducing interference with the expanding surface when the expansion cover 120 rotates.

The hammer 130 is stably fixed by being supported by the support 128 provided inside the expansion cover 120 when the hammer 130 is mounted on the expansion cover 120. On the other hand, the support portion 128 may be such that the supply pipe 111 is inserted by a method such as interference fit so that the supply pipe 111 is connected to the drive rod 110.

The actuator drives each of the hammers 130 and is detachably installed in the expansion cover 120, and may be formed of a mud pump 140 as in the present embodiment.

The mud pump 140 is operated by a mixture of water and bentonite supplied from the driving rod 110 and provides a pumping force to drive the hammer 130. That is, the mud pump 140 operates by using a mixture of water and bentonite as a working fluid to generate a pumping force. The mixture is supplied and provides sufficient pumping force through the supply line 141 to reciprocate the piston 133 of the hammer 130. In addition, the mud pump 140 may use its own working fluid supplied with the fluid for directly operating the hammer 130 from the driving rod 110 as well as different oils or compressed air, and the like. It may have a chamber.

The mud pump 140 may be provided with a distribution unit 142 to provide a pumping force through the supply line 141 to each of the body 132 of the hammer 130 made of a plurality.

The variable diameter directing horizontal drilling machine expansion apparatus 100 according to the present invention may have a distribution module 112 and a discharge hole 134 to inject a mixture of water and bentonite forward from the driving rod 110. have.

The distribution module 112 is installed in the supply pipe 111 for supplying the mixture from the driving rod 110 to the mud pump 140, the body of each of the hammer 130 through the distribution tube 113, the mixture of water and bentonite To (132). Here, the distribution pipe 113 is connected to supply the mixture to the space in which the striking head 131 is located in the space inside the body 132 of the hammer 130.

The discharge hole 134 is formed in the striking head 131 to inject a mixture of water and bentonite forward from the distribution module 112 through the distribution pipe 113, and in the striking head 131 as in this embodiment It may be formed in a plurality, the supply from the distribution pipe 113 is directly supplied to the discharge hole 134, or the mixture supplied from the distribution pipe 113, as in this embodiment supply to the striking head 131 It may be supplied to be distributed to the plurality of discharge holes 134 through the flow path (135).

Rotation of the drive rod 110 and mixture supply are controlled by an external control device.

The variable fixing part 160 allows each of the hammers 130 to be fixed by varying a position in a radial direction with respect to the rotation center of the driving rod 110. 4, for example, a plurality of hammers 130 are installed in each of the hammers 130, and each of the supply pipes 111 and the body 132 of the hammer 130 to supply a mixture of water and bentonite. A pair of link members 161 are fixed at each end and overlap each other, a sliding hole 162 extending along a length direction of each of the link members 161, and a link member 161 through the sliding hole 162. It may include a fixing bolt 163 and a fixing nut (not shown) for fixing each other. Therefore, the distance between the hammer 130 and the supply pipe 111 can be adjusted by changing the fastening position of the fixing bolt 163 and the fixing nut in the sliding hole 162.

As shown in FIGS. 5 and 6, the hammer 130 is variable in position by the variable fixing unit 160, so that the hammer 130 may be mounted on another expansion cover 150 which is replaced with a different diameter. It can be used for expansion holes of different diameters. Here, the other expansion cover 150 is replaced by forming a through hole 153 in the proper position for expansion by the variable fixing part 160 so that the striking head 131 of the hammer 130 is mounted in the through hole 153. To change the fixed position of the hammer (130).

The distribution pipe 113 and the supply line 141 may be a pipe that can be bent or expanded by a flexible material or a structure such as bellows to change the position of the hammer 130. In addition, as shown in FIG. 5, the expansion cover 150 (FIG. 6B) has a larger diameter than the previous expansion cover 120 (FIG. 6A), thereby providing an actuator, for example, a mud. When a gap with an internal component such as the pump 140 occurs, a spacer 159 can be provided in this gap. Here, the spacer 159 may be fixed to the expansion cover 150 or the base plate 155 and the mud pump 140 by using fastening members such as screws or bolts.

On the other hand, the actuator may be made of an air chamber 170 for supplying each of the hammer pneumatic pressure supplied through the pneumatic line 172 from the external pneumatic supply unit in place of the mud pump 140 of the present embodiment.

The air chamber 170 distributes and supplies the pneumatic pressure supplied through the pneumatic line 172 to each of the bodies 131 of the hammer 130 through the supply line 171 so that the hammer 130 is driven by pneumatic pressure.

8 is a flowchart illustrating a directional horizontal excavation expansion method according to the present invention, Figure 9 is a view for explaining a directional horizontal excavation expansion method according to the present invention.

As shown in Figure 8 and 9, the directional horizontal excavation expansion method according to the present invention is a drive rod insertion step (S11), expansion cover diameter variable and connection step (S12), drive rod rotation and drawing step ( S13), and the expansion step (S14) by the actuator drive.

According to the driving rod insertion step (S11), by inserting the driving rod 110 connected to the excavating equipment into the excavation hole (A) to the starting hole of expansion, that is, from the excavation hole (A) to the point where the expansion hole (B) starts To get there.

According to the expansion cover diameter variable and connection step (S12), by selecting the expansion cover (120,150) corresponding to the diameter of the expansion hole (B), the hammer 130 is fixed by the variable fixing part 160 is variable And actuators for driving the hammer 130 in the expansion cover 120, respectively, and then the ends of the driving rods 110 exposed from the start holes are formed at the front end of the linear body 124 of the expansion cover 120. It is connected to the conical head 121.

According to the driving rod rotation and drawing step (S13), the expansion cover 120 is pulled while rotating the driving rod 110 by the driving of the drilling equipment.

According to the expansion step (S14) by the actuator drive, by driving the actuator to reciprocate the impact head 131 of each of the hammer 130 exposed forward from the head 121 back and forth to hit the ground in front The tip 122 protruding from the front of the head 121 causes friction in the ground of the front to expand the excavation hole. In addition, this step (S14) is supplied to the mud pump 140, which is installed inside the expansion cover 120 by a mixture of water and bentonite over a predetermined pressure through the drive rod 110 as a working fluid mud pump ( 140 may drive the hammer 130 by providing a pumping force for driving the plurality of hammers 130 installed inside the expansion cover 120, and a portion of the mixture of water and bentonite is distributed in the distribution module 112 ) To be supplied to the body 132 of the hammer 130 by the distribution pipe 113 to be sprayed to the front of the hitting head 131 through the supply path 135 and the discharge hole 134, thereby excavating You can increase your strength.

On the other hand, expansion step (S14) by the actuator drive through the air chamber 170 through which the pneumatic pressure is supplied from the external pneumatic supply through the pneumatic line 172 by the supply line 171 to each of the hammer 130 The hammer 130 may be supplied to drive the hammer 130, respectively.

Preferred embodiments of the present invention described above are disclosed for purposes of illustration, and those skilled in the art will be able to make various modifications, changes, and additions within the spirit and scope of the present invention. Additions should be considered to be within the scope of the following claims.

110: drive rod 111: supply pipe
112: distribution module 113: distribution pipe
120,150: expansion cover 121: head
122: tip 123,153: through hole
124: straight body 125,125: base plate
126: bracket 127: fastening bolt
128: support 130: hammer
131: hitting head 132: body
133: piston 134: discharge hole
135: supply path 140: actuator
141: supply line 142: distribution unit
160: variable fixing part 161: link member
162: sliding hole 163: fixing bolt
170: air chamber 171: supply line
172: Pneumatic Line

Claims (7)

In the directional horizontal digging expander,
The driving rod connected to the excavating equipment is connected to the tip to provide a conical head for receiving rotational force, and a plurality of tips protrude from the front of the head, and the cylindrical straight body is integrated from the head to the rear. An expansion cover comprising a base plate detachably fixed to the rear end by a bracket;
A plurality of hammers mounted on the inner side of the expansion cover to be separated from each other, each hitting head reciprocating forward and backward through a plurality of through holes formed around the center of rotation at the head;
An actuator for driving the hammer and detachably installed from the expansion cover; And
Each of the hammers is fixed to vary the position in the radial direction relative to the center of rotation of the drive rod, it is made of a plurality to be installed on each of the hammer, each supply pipe for supplying a mixture of water and bentonite and the hammer A fixed end and a fixed nut for fixing the link member to each other through the sliding hole and the sliding hole extending along the longitudinal direction of each of the link member and the link member overlapping each other is fixed to the body of the link member Including variable fixation,
The hammer is variable in position by the variable fixing part, so that the hammer can be mounted on another expansion cover to be replaced with a different diameter, so that it can be used in expansion holes of different diameters Expander for direct-oriented horizontal digging.
delete The method of claim 1, wherein the hammer,
And a tip of the striking head is formed to have the same inclined surface as the inclination of the head, and is installed at equal intervals along the circumference of the center of rotation in the air expander.
The method of claim 1, wherein the actuator,
And a mud pump operated by a mixture of water and bentonite supplied from the driving rod and providing a pumping force to drive the hammer.
The method of claim 4, wherein
A distribution module installed in a supply pipe for supplying the mixture from the driving rod to the mud pump, and supplying the mixture to the bodies of the hammers through a distribution pipe; And
A discharge hole formed in the striking head to inject the mixture supplied from the distribution module through the distribution pipe to the front;
Expandable diaphragm oriented horizontal drilling rig, characterized in that it comprises a.
The method of claim 1, wherein the actuator,
A wide-angle diameter directional horizontal excavating construction machine comprising: an air chamber for supplying each of the hammers with pneumatic pressure supplied from an external pneumatic supply unit through a pneumatic line.
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