KR102388624B1 - boring head excavating ground using ultra high pressure water and operating without electric power - Google Patents

Abstract

The non-powered boring head according to the present invention capable of injecting incoming water to an ultra-high pressure by self-increasing without a separate external power source or control device includes: first and second cylinders of a first inner diameter; a third cylinder having a second inner diameter smaller than the first inner diameter; A first piston inserted into the first cylinder, a second cylinder inserted into the second cylinder, and the first and second pistons coupled to both ends of a common rod passing through the first to third cylinders and a piston module coupled to the common rod and including a third piston inserted into the third cylinder; first to fourth pressure paths connected to both ends of the first and second cylinders to supply water; and a first discharge path connected to both ends of the third cylinder. In this case, the pressure of the water in the third cylinder may be increased by dividing the cross-sectional area of the empty space inside the first and second cylinders by the cross-sectional area of the empty space inside the third cylinder.

Description

Unpowered boring head for ground excavation using ultra high pressure water injection {boring head excavating ground using ultra high pressure water and operating without electric power}

The present invention relates to a non-powered boring head, and more particularly, to excavate the ground using ultra-high pressure water injection, which can dig into the ground by spraying by increasing the pressure of the incoming water to an ultra-high pressure without external power supply. It relates to an unpowered boring head.

The ultra-high pressure water spraying technology is a technology that cuts or crushes an object by spraying the inflowing fluid to ultra-high pressure. It is a technology widely used in various industrial fields such as machining, stone processing, and civil engineering. In particular, in the civil engineering field, a technique for excavating the ground by spraying ultra-high pressure water through a boring sed has been developed and utilized.

As described above, in order to generate ultra-high pressure water sprayed through the boring head, it is often necessary to pressurize the water supplied using electric power or an internal combustion engine. There is a problem that it is complicated and often malfunctions occur.

Accordingly, the technical problem to be solved by the present invention is to provide a non-powered boring head capable of excavating the ground by boosting and spraying the incoming water to an ultra-high pressure only by reciprocating the piston module based on the pressure of the incoming water without supplying external power. will be.

The technical problems to be achieved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from the description below. will be able

Powerless boring head for ground excavation according to the present invention for solving the above technical problem, the first and second cylinders having a first inner diameter and the same outer diameter as the central axis; The first and second cylinders have the same outer diameter, are coupled between the first and second cylinders, have a second inner diameter smaller than the first inner diameter therein, and have the same central axis as the first and second cylinders a central body on which a third cylinder is formed; and a first piston inserted into the first cylinder, a second cylinder inserted into the second cylinder, and a common rod coupled to both ends of the first and second pistons passing through the first to third cylinders. ), and a piston module including a third piston coupled to the common rod and inserted into the third cylinder.

At this time, water is supplied to the central body from one side of the first cylinder through an inflow path including the barrel section of the first cylinder, and the pressurized water is a first discharge including the barrel section of the second cylinder. The water in the third cylinder is discharged to the other side of the second cylinder through the path, and the cross-sectional area of the empty space inside the first and second cylinders is calculated based on the reciprocating motion of the piston module. The pressure can be increased by dividing the cross-sectional area of the empty space.

In the central body, first to fourth pressure paths connected to both ends of the first and second cylinders for supplying water; a first inlet and outlet hole provided at the other end of the third cylinder and connected to the first discharge path; and a second outlet hole provided at one end of the third cylinder and connected to the first discharge path.

In the first pressure-increasing mode, water is supplied through first and third pressurization paths connected to one end of the first and second cylinders so that the first to third pistons move from one end of the corresponding cylinder to the other end, and the third Water pressurized by the piston may be discharged to the first discharge path through the first inlet/outlet hole.

In the second pressure-increasing mode, water is supplied to the second and fourth pressurization paths connected to the other ends of the first and second cylinders so that the first to third pistons move from the other end of the corresponding cylinder to one end, and the third Water pressurized by the piston may be discharged to the first discharge path through the second inlet/outlet hole.

The non-powered boring head supplies water to the first and third pressurization paths or selectively to the second and fourth pressurization paths according to the pressure increasing mode, but a third provided in the central body parallel to the third cylinder 1 Pressing path adjusting member inserted into the hole; and a discharge path adjusting member that selectively communicates the first discharge path with one of the first and second inlet and outlet holes according to the pressure increasing mode, and is inserted into a second hole provided in the central body parallel to the third cylinder may further include.

In the first hole, the longitudinal center communicates with the inflow path, a first supply hole communicating with the first and third pressing paths is formed on one side, and the second and fourth pressing paths on the other side A second supply hole to communicate with may be formed.

The pressure path adjusting member is shaft-fixed at one end and the other end of the first hole and has a cylindrical shape movable in the longitudinal direction inside the first hole, and a first sealing member for sealing the first hole in the horizontal direction at one side is coupled, and a second sealing member capable of sealing the first hole in the transverse direction may be coupled to the other side.

In the first pressure increasing mode, the pressure path adjusting member is located at one end of the first hole so that the first supply hole communicates with the center of the first hole, but the second supply hole is connected to the first by the second sealing member. It can be blocked from the center of the hole.

In the second pressure-increasing mode, the pressure path adjusting member is located at the other end of the first hole so that the first supply hole is blocked from the center of the first hole by the first sealing member, but the second supply hole is the first hole. It can communicate with the center.

In the second hole, the longitudinal center communicates with the inlet path, one side communicates with the second outlet hole and the first outlet path, and the other end communicates with the first outlet hole and the first outlet path. can be

The discharge path adjusting member is shaft-fixed at one end and the other end of the second hole and has a cylindrical shape movable in the longitudinal direction inside the second hole, and a third sealing member for sealing the second hole in the horizontal direction at one side is coupled, and a fourth sealing member capable of sealing the second hole in the transverse direction may be coupled to the other side.

In the first pressure-increasing mode, the discharge path adjusting member is located at one end of the second hole so that the first inflow hole communicates with the center of the second hole, but the second inflow hole is connected to the second by the fourth sealing member. It can be blocked from the center of the hole.

In the second pressure-increasing mode, the discharge path adjusting member is located at the other end of the second hole so that the second inflow hole is blocked from the center of the second hole by the third sealing member, but the first inflow hole is the second It can communicate with the center of the hall.

In the first pressure increasing mode, one fixed shaft of the discharge path adjusting member may protrude to the other side of the first cylinder, and one fixed shaft of the pressure path adjusting member may protrude to the other side of the first cylinder. In the second pressure increasing mode, the other fixed shaft of the discharge path adjusting member may protrude toward one side of the second cylinder, and the other fixed shaft of the pressure path adjusting member may protrude toward one side of the second cylinder.

The discharge path adjusting member, according to the change of the pressure increase mode, by the first and second pistons of the discharge path adjusting member one side and the protrusion of the other fixed shaft is pressed alternately by the reciprocating movement in the longitudinal direction in the second hole can do.

The pressure path adjusting member, the first and second pistons according to the change of the pressure increasing mode, the protrusions of one side and the other side of the fixed shaft of the pressure path adjusting member are pressed alternately to reciprocate in the longitudinal direction in the first hole. can

In the central body, a plurality of second discharge paths symmetrically provided in the barrel of the second cylinder for water discharged from the first and second cylinders through the second and fourth pressure paths in the first pressure increase mode are provided. a first discharge hole for discharging in the other end direction of the second cylinder; and a second for discharging water discharged from the first and second cylinders through the first and third pressure paths in the second pressure increasing mode to the other end direction of the second cylinder through the plurality of second discharge paths. A discharge hole may be further formed.

At this time, the non-powered boring head for ground excavation extends from the other side of the second cylinder, receives the pressurized water discharged through the first discharge path, and provides a first injection hole having the same central axis as the second cylinder. a spraying unit for spraying through; and a bearing coupled to the injection unit, and a rotating unit generating rotational force by water discharged through the plurality of second discharge paths. and a spray module that is rotatable together with the rotating part and includes a dispersion part that disperses and sprays the pressurized water sprayed through the first spray hole through a plurality of second spray holes.

The non-powered boring head capable of excavating the ground using ultra-high pressure water injection according to the present invention is based on the reciprocating motion of the piston module according to the pressure of the incoming water, without the supply of external power, the water can be sprayed by increasing the pressure to ultra-high pressure. Therefore, the risk of safety accidents is low, and the simple structure makes it possible to miniaturize and provide a high durability effect.

The non-powered boring head according to the present invention can provide an effect of easily increasing the injection pressure of water by designing different inner diameters of a plurality of cylinders in which the piston module reciprocates.

1 to 3 are conceptual views for explaining the basic operating principle of the non-powered boring head 100 according to the present invention.
4 is a block diagram corresponding to the basic configuration of the non-powered boring head 100 according to the present invention.
5 and 6 are first and second cross-sectional views in the longitudinal direction of the non-powered boring head 100 according to the present invention at the start of the first pressure-increasing mode.
7 and 8 are conceptual views for explaining the movement path of water in the non-powered boring head 100 according to the present invention, and cross-sectional views in the transverse direction at various parts of the non-powered boring head 100 .
9 is a right side view of the non-powered boring head 100 according to the present invention.
10 to 13 are enlarged views of parts of the cross-sectional view shown in FIG. 5 , and FIGS. 14 to 17 are enlarged views of parts of the cross-sectional view shown in FIG. 6 .
18 and 19 are cross-sectional views of the non-powered boring head 100 according to the present invention when the first pressure-increasing mode ends and the second pressure-increasing mode starts.

In order to fully understand the present invention, the operational or functional advantages of the present invention, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings illustrating preferred embodiments of the present invention and the contents described in the accompanying drawings.

Hereinafter, the present invention will be described in detail by describing preferred embodiments of the present invention with reference to the accompanying drawings. The same reference numerals provided in the respective drawings may refer to the same members.

1 to 3 are conceptual views for explaining the basic operating principle of the non-powered boring head 100 according to the present invention.

The non-powered boring head 100 is characterized in that it can spray water by increasing the pressure to an ultra-high pressure by itself without external power supply based on the mechanical movement of the components according to the movement of the incoming water, and is characterized in that it has high durability. On the other hand, in order to ensure durability, the components of the non-powered boring head 100 are preferably implemented with a metal material and a reinforced synthetic resin material. In addition, the non-powered boring head 100 can provide an effect of easily increasing the pressure of water to a desired pressure increase ratio by designing different inner diameters of a plurality of cylinders in which the piston module reciprocates.

The non-powered boring head 100 includes a first cylinder 101 , a second cylinder 102 , a third cylinder 103 , a piston module 110 , and a plurality of pressurization paths 121 to 124 . Meanwhile, since the components of the non-powered boring head 100 shown in FIGS. 1 and 2 are not essential, the non-powered boring head 100 may have more components or fewer components.

The first cylinder 101 and the second cylinder 102 have the same outer diameter and the same first inner diameter. And the third cylinder 103 has a second inner diameter smaller than the first inner diameter of the first cylinder 101 and the second cylinder 102 . The first to third cylinders 101 , 102 and 103 have the same central axis.

The piston module 110 includes a first piston 111 inserted into the first cylinder 101 to reciprocate, a second piston 112 inserted into the second cylinder 102 to reciprocate, and the third It is inserted into the cylinder 103 and includes a third piston 113 and a common rod 114 reciprocating. The common rod 114 is installed through the first to third cylinders 101 , 102 and 103 .

The first piston 111 and the second piston 112 are coupled to both ends of the common rod 114 , and the third cylinder 103 is coupled to the transverse central portion of the common rod 114 . The common rod 114 passes through one side of the first cylinder 101, one side of the third cylinder 103, and both sides of the second cylinder 102 to pass through the first to third pistons 111 to 123. ) is combined with

In the first cylinder 101, a first pressure path 121 is connected to one end thereof, and a second pressure path 122 is connected to the other end thereof, and in the second cylinder 102, a third pressure path ( 123) is connected to the other end of the fourth pressing path 124. These pressurization paths 121 to 124 supply water for pressurizing the first piston 111 and the second piston 112 according to the pressure increasing mode (that is, according to the piston movement direction), or the first cylinder 101 and the second cylinder 102 are used as a path for discharging the inside of the water.

A first outlet hole 131 and a second outlet hole 132 are formed at both ends of the third cylinder 103 . The first inlet and outlet hole 131 communicates the other end of the third cylinder 103 with a first discharge path (not shown), and the second inlet hole 132 connects one end of the third cylinder 103 . It may communicate with the first discharge path. These inlet and outlet holes 131 and 132 are used to supply water to one end or the other end of the third cylinder 103 or discharge the pressure-increasing water according to the pressure-increasing mode.

In the non-powered boring head 100 , the first to third pistons 111 to 113 move together with the common rod 114 by the pressure of water. At this time, the water in the third cylinder 103 is obtained by dividing the cross-sectional area of the empty space inside the first cylinder 101 and the second cylinder 102 by the cross-sectional area of the empty space inside the third cylinder 103 . The pressure is increased and discharged through the first outlet hole 131 or the second outlet hole 132 .

The non-powered boring head 100 can spray the above-mentioned ultra-high pressure water pressure only by the pressure of the incoming water without an external power supply, which will be described in detail with reference to other drawings in the future.

In the above, each of the basic components of the non-powered boring head 100 was examined. Hereinafter, a mechanism in which the non-powered boring head 100 operates in the first pressure-increasing mode and the second pressure-increasing mode will be described with reference to the conceptual diagrams illustrated in FIGS. 1 to 3 .

For reference, FIGS. 1 and 2 are conceptual diagrams illustrating a first pressure-increasing mode, and FIG. 3 is a second pressure-increasing mode. And the first pressure-increasing mode refers to a pressure-increasing mode in which the piston module 110 moves from one side to the other side inside the non-powered boring head 100, and the second pressure-increasing mode is the piston module 110 in the non-powered boring head ( 100) It refers to the pressure-increasing mode that moves from the other side to one side of the inside.

In the first pressure increase mode, water is supplied to the first pressure path 121 and the third pressure path 123 connected to one end of the first cylinder 101 and the second cylinder 102 . Then, the first piston 111 and the second piston 112 are pressurized by the supplied water, and the first to third pistons 111 to 113 move from one end of the corresponding cylinder to the other end.

That is, the entire piston module 110 coupled to the common rod 114 moves from one end of the non-powered boring head 100 to the other end. As a result, the water in the third cylinder 103 is pressurized by the third piston 113 and discharged to the first inlet/outlet hole 131 .

On the other hand, in the first pressure increasing mode, the water stored in the first cylinder 101 and the second cylinder 102 is supplied to the cylinder through the second pressure path 122 and the fourth pressure path 124, respectively. discharged to the outside And water is supplied into the third cylinder 103 through the second inlet and outlet holes 132 .

In the second pressure increase mode, water is supplied to the second pressure path 122 and the fourth pressure path 124 connected to the other ends of the first cylinder 101 and the second cylinder 102 . Then, the first piston 111 and the second piston 112 are pressurized by water, and the first to third pistons 111 to 113 move from the other end of the corresponding cylinder to one end.

That is, the entire piston module 110 coupled to the common rod 114 moves from the other end of the non-powered boring head 100 to one end. As a result, the water in the third cylinder 103 is pressurized by the third piston 113 and discharged to the second inlet/outlet hole 132 .

On the other hand, in the second pressure increasing mode, the water stored in the first cylinder 101 and the second cylinder 102 is supplied to the cylinder through the first pressure path 121 and the third pressure path 123, respectively. discharged to the outside And water is supplied into the third cylinder 103 through the first inlet and outlet holes 131 .

According to the mechanism described above, the water in the third cylinder 103 is the cross-sectional area of the empty space inside the first cylinder 101 and the second cylinder 102 , the cross-sectional area of the empty space inside the third cylinder 103 . It can be discharged by increasing the pressure by dividing the pressure by .

4 is a block diagram corresponding to the basic configuration of the non-powered boring head 100 according to the present invention.

Referring to FIG. 4 , the non-powered boring head 100 includes the first to third cylinders 101 to 103 , the first to third pistons 111 to 113 , the common rod 114 , and the first to third cylinders 101 to 103 . 4 In addition to the pressing paths (121 to 124), it further includes a pressing path adjusting member 140 and a discharge path adjusting member (150).

The pressure path adjusting member 140 moves to one end of the first cylinder 101 and the second cylinder 102 through the first pressure path 121 and the third pressure path 123 according to the pressure increasing mode. It may be determined whether to supply water or to supply water to the other end of the first cylinder 101 and the second cylinder 102 through the second pressurization path 122 and the fourth pressurization path 124 .

The discharge path control member 150 may selectively communicate the first discharge path 160 with the first outlet hole 131 or the second outlet hole 132 of the third cylinder 103 according to the pressure increase mode. there is.

Here, the third cylinder 103 is inside the central body 170 coupled to the other end of the first cylinder 101 and one end of the second cylinder 102 in the longitudinal direction of the central body 170 . can be provided. And the third cylinder 103 communicates with the other end of the first cylinder 101 and one end of the second cylinder 102 . According to this structure, the piston module 110 may reciprocate within the first to third cylinders 101 to 103 .

And a first hole (not shown) into which the pressing path adjusting member 140 is inserted and a second hole (not shown) into which the discharge path adjusting member 150 is inserted are formed in the central body 170 . 3 may be formed in the longitudinal direction of the central body 170 parallel to the cylinder (103).

The pressure path control member 140 and the discharge path control member 150 have the above-described operation or function only by mechanical operation by the pressure of water flowing into the non-powered boring head 100 without an electric device for supplying external power. can be performed. Therefore, the powerless boring head 100 according to the present invention can provide the advantage of excellent durability and risk of safety accidents.

Hereinafter, the powerless boring head 100 according to the present invention will be described in detail with reference to a more specific example.

5 and 6 are first and second cross-sectional views in the longitudinal direction of the non-powered boring head 100 according to the present invention when the first pressure-increasing mode starts.

7 and 8 are conceptual views for explaining the movement path of water in the non-powered boring head 100 according to the present invention, and cross-sectional views in the transverse direction at various parts of the non-powered boring head 100 .

9 is a right side view of the non-powered boring head 100 according to the present invention.

10 to 13 are enlarged views of parts of the cross-sectional view shown in FIG. 5 , and FIGS. 14 to 17 are enlarged views of parts of the cross-sectional view shown in FIG. 6 .

18 and 19 are cross-sectional views of the non-powered boring head 100 according to the present invention at the end of the first pressure-increasing mode and the beginning of the second pressure-increasing mode.

First, a structure of the non-powered boring head 100 will be described.

The non-powered boring head 100 is basically composed of a first cylinder 101 , a second cylinder 102 , a piston module 110 , a central body 170 , and an injection module 200 . The first and second cylinders 101 and 102 and the central body 170 preferably have the same outer diameter as they move while excavating the ground.

The piston module 110 includes a first piston 111 , a second piston 112 , a third piston 113 , and a common rod 114 . The first piston 111 includes a plurality of side packings 111A and a plurality of sealing means 111B. This is the same in the second piston 112, although no reference number is given. And although no reference number is given, the piston packing is also included in the third piston 113 having a small diameter.

In addition, a plurality of sealing means indicated in a circle are mounted on the parts requiring sealing between the components as well as the packing of the piston. For example, referring to FIG. 10 , a plurality of sealing means 101A-1 to 101A-3 are mounted between the cylinder cover 101A and the body of the first cylinder 101, and the cylinder cover 101A A plurality of sealing means (101B-1) is also mounted between the outer cover (101B) of the.

And one end of the first piston 111 is sealed with the cylinder cover 101A. Although no reference number is given, the same applies to the other end of the second cylinder 102 . In another embodiment of the present invention, the cylinders 101 and 102 may not be sealed by a cover, but may be sealed in a structure connected to the barrel.

The central body 170 is formed with a third cylinder 103, a first hole 171 into which the pressure path adjusting member 140 is inserted, and a second hole 172 into which the discharge path adjusting member 150 is inserted. there is. In addition, various holes, connection holes, and paths through which water can move are formed in the central body 170 . Some of them communicate with paths provided in the first cylinder 101 and the second cylinder 102 .

The longitudinal center of the first hole 171 communicates with the inflow path 173 . Water is introduced into the first hole 171 from one side of the first cylinder 101 through the inlet path 173 communicating with the inlet pipe 190, and other components through the plurality of holes and paths. is transmitted to The inflow path 173 may include a barrel section of the first cylinder 101 and a section formed in the central body 170 .

The inflow path 173 may include a section formed by the outer cover 101B and the cylinder cover 101A. The inflow path 173 may be composed of two paths. This is to stably supply water by creating a plurality of paths having a small diameter due to the structural characteristics in which a plurality of holes must be formed in the central body 170 .

A first supply hole 174 communicating with the first pressing path 121 and the third pressing path 123 is formed at one end of the first hole 171 . A second supply hole 175 communicating with the second pressing path 122 and the fourth pressing path 124 is formed at the other end of the first hole 171 .

The central body 170 has two first discharge holes communicating with the second pressing path 122 and the fourth pressing path 124 for discharging water that is not pressurized from the central body 170 to the outside. (176) is formed. The first discharge hole 176 communicates with the two second discharge paths 182 and 183 through the guide paths 176A and 176B.

The second discharge paths 182 and 183 are symmetrically formed in the barrel of the second cylinder 102 , and water through the second discharge paths 182 and 183 flows into the second cylinder 102 . discharged to the other end. The reason that the second discharge paths 182 and 183 are formed symmetrically is to rotate the rotating part 203 of the injection module 200 to be considered in the future in a balanced and stable manner. On the other hand, unlike the drawings, three or more second discharge paths for discharging non-pressurized water may be symmetrically provided in the barrel of the second cylinder 102 .

The central body 170 communicates with the first pressurization path 121 and the third pressurization path 123 to discharge water that is not pressurized from the central body 170 to the other end of the second cylinder 102 . A second discharge hole 177 is formed for this. The second discharge hole 177 communicates with the two second discharge paths 182 and 183 through the guide paths 177A and 177B.

The pressure path adjusting member 140 is shaft-fixed to one end and the other end of the first hole 171 and has a cylindrical shape movable in the longitudinal direction inside the first hole 171 . A first sealing member 141 capable of sealing the first hole 171 in the horizontal direction is coupled to one side of the pressing path adjusting member 140 , and the second sealing member 141 is coupled to the other side of the pressing path adjusting member 140 . A second sealing member 142 capable of sealing the first hole 171 in the horizontal direction is coupled.

One fixed shaft 143 and the other fixed shaft 144 of the pressure path adjusting member 140 are smaller in diameter than the body of the pressure path adjusting member 140, respectively, the other side of the first cylinder 101 and It may protrude to one side of the second cylinder 102 .

A longitudinal center of the second hole 172 may communicate with the inflow path 173 to receive water through the inflow path 173 . In the drawing, the second hole 172 communicates with the inflow path 173 via the first hole 171 through the hole communication path 178, but in another embodiment of the present invention, the second hole ( 172 may be directly communicated with the inflow path 173 or may communicate with the inflow path 173 through another path.

One side of the second hole 172 may communicate with the second outlet hole 132 and the first outlet path 160 formed in the third cylinder 103 . One side of the second hole 172 may communicate with the first discharge path 160 through the first connection hole 180 . The other side of the second hole 172 may communicate with the first outlet hole 131 and the first outlet path 160 . The other side of the second hole 172 may communicate with the first discharge path 160 through the second connection hole 181 .

The discharge path control member 150 is shaft-fixed to one end and the other end of the second hole 172 and has a cylindrical shape movable in the longitudinal direction inside the second hole 172 . A third sealing member 151 capable of sealing the second hole 172 in the transverse direction is coupled to one side of the discharge path control member 150 , and the other side of the discharge path control member 150 has the second hole 172 . A fourth sealing member 152 capable of sealing the second hole 172 in the horizontal direction is coupled.

One fixed shaft 153 and the other fixed shaft 154 of the discharge path control member 150 are smaller in diameter than the body of the discharge path control member 150, respectively, the other side of the first cylinder 101 and It may protrude to one side of the second cylinder 102 .

The first discharge path 160 may discharge the pressurized water discharged through the first inlet hole 131 and the second outlet hole 132 to the outside of the central body 170 . The first discharge path 160 is a section provided in the central body 170, a section provided in the barrel of the second cylinder 102, a section provided in the cover 102A of the second cylinder 102, and the cover It may include a section formed between (102A) and the injection unit 201 of the injection module (200).

As such, the non-powered boring head 100 according to the present invention has all the paths for the inflow and discharge of water and the discharge of the pressurized water, so it can be implemented in a compact size, and external force or impact Because it has strong structural characteristics, it can have advantages of strong durability and low failure rate.

The first pressing path 121 may include a first section formed in the central body 170 and a second section formed in the barrel of the first cylinder 101 . The fourth pressing path 124 may include a third section formed in the central body 170 and a fourth section formed in the barrel of the second cylinder 102 .

The second pressing path 122 may be formed in the central body 170 to communicate with the third section. The third pressing path 123 may be formed in the central body 170 to communicate with the first section. On the other hand, since the above-described sub-sections can be clearly identified in the drawings, separate reference numbers are not assigned to them.

In addition, a portion of the first pressing path 121 and the fourth pressing path 124 may be formed in the cylinder cover portion. On the other hand, although not described by giving reference numbers in the drawings, the coupling portion of the central body 170 and the first cylinder 101 and the second cylinder 102, the piston module 110 is the central body 170 ), a portion in which the pressure path adjusting member 140 and the discharge path adjusting member 150 are in contact with the central body 170, the first cylinder 101 and the second cylinder 102 A sealing member is provided at the coupling portion of the cylinder cover and the like.

The injection module 200 may inject the water pressurized to ultra-high pressure supplied through the first discharge path 160 in a path extending from the central axis of the second cylinder 102 . The pressurized water provides a strong force to excavate the ground.

The injection module 200 includes an injection unit 201 , a rotation unit 203 , and a dispersion unit 204 . The injection part 201 is coupled to the other side of the second cylinder 102 . The injection unit 201 may inject the pressurized water discharged through the first discharge path 160 through the first injection hole 201A having the same central axis as the second cylinder 102 .

The rotating part 203 is coupled to the spraying part 201 through a bearing 202 , and may be rotated by non-pressurized water discharged through the second discharge paths 182 and 183 . A plurality of grooves 203A having the same directionality are provided along the circumference of the rotating part 203 to which the non-increased water is supplied, so that the rotating part 203 can rotate by the discharge pressure of the non-increased water. there is. Meanwhile, in another embodiment of the present invention, the rotating part 203 may have another structure such as a propeller capable of generating rotational force by the pressure of the non-increased water.

The dispersing unit 204 may be coupled to the rotating unit 203 to rotate together with the rotating unit 203 . The dispersion unit 204 includes a dispersion path 204' and a plurality of second injection holes 204A to 204E. The dispersing path 204 ′ is a path formed in the radial direction of the dispersing unit 204 , and is a path through which the dispersing unit 204 moves the pressurized water sprayed through the first injection hole 201A.

The plurality of second injection holes 204A to 204E disperse and spray the pressurized water supplied through the dispersion path 204'. The plurality of second injection holes 204A to 204E are a plurality of injection holes 204A formed on the left side with respect to the diameter line, a plurality of injection holes 204B formed on the right side with respect to the diameter line, and on the diameter line. and located injection holes 204C and 204D.

The injection holes 204C and 204D may spray the pressurized water inclined counterclockwise rather than perpendicular to the ground. Then, a clockwise rotational force is applied to the dispersion unit 204 due to the resulting spray reaction. The direction of the rotational force by the injection holes 204C and 204D is the same as the direction of the rotational force applied to the rotation part 203 by the non-increased water injected through the second discharge paths 182 and 183. desirable.

On the other hand, spraying the pressure-increased water with a directionality so that a clockwise rotational force is applied to the dispersion unit 204 may be equally applied to the other injection holes 204A and 204B. In addition, the injection holes 204A and 204B are symmetrically disposed about the diameter line, so that the rotational force applied to the injection unit 201 may be stronger.

As such, the non-powered boring head 100 according to the present invention sprays the pressurized water while the injection module 200 rotates by the rotational force applied by both the pressurized water and the non-increased water. Compared to the case of spraying the water pressurized in the ground, straightness can be improved when excavating the ground.

As described above, in the non-powered boring head 100 according to the present invention, the first cylinder 101, the second cylinder 102 and the plurality of paths, holes and connection holes required for inflow, movement, discharge, and injection of water are all provided. It is characterized in that it is formed in the central body (170).

In the above, the structure of the non-powered boring head 100 was examined. Hereinafter, an operation mechanism of the non-powered boring head 100 according to the pressure-increasing mode will be described on the assumption that water supplied to a predetermined pressure is filled in the non-powered boring head 100 according to the present invention.

In the first pressure increasing mode, the first piston 111 and the second piston 112 are positioned at one end of the first cylinder 101 and the second cylinder 102, and the third piston 113 is It is located on one side of the third cylinder 103 . And the pressure path adjusting member 140 is located at one end of the first hole 171 , and the discharge path adjusting member 150 is located at one end of the second hole 172 . In addition, one fixed shaft 143 of the pressing path adjusting member 140 protrudes to the other side of the first cylinder 101 .

As the pressure path adjusting member 140 is positioned at one end of the first hole 171 , the first supply hole 174 communicates with the central portion of the first hole 171 , and the second supply hole 175 . ) is blocked from the center of the first hole 171 by the second sealing member 142 .

Then, the water supplied from the inlet pipe 190 and supplied to the first hole 171 through the inlet path 173 is the first pressurized path 121 and It moves through the third pressing path 123 . Then, the first piston 111 moves from one end of the first cylinder 101 to the other end, and the second piston 112 moves from one end of the second cylinder 102 to the other end, and the third The piston 113 moves from one end of the third cylinder 103 to the other end. That is, the entire piston module 110 moves from one side to the other inside the non-powered boring head 100 .

At this time, the water filled in the first cylinder 101 is discharged through the second pressurization path 122 , and the water filled in the second cylinder 102 is discharged through the fourth pressurization path 124 . Water discharged from the first cylinder 101 and the second cylinder 102 passes through the first discharge hole 176, the induction paths 176A and 176B, and the second discharge paths 182 and 183 to be discharged in the other end direction of the second cylinder 102 . At this time, the water discharged through the second discharge paths 182 and 183 applies a rotational force to the rotating part 203 of the injection module 200 .

In the first pressure-increasing mode, the discharge path control member 150 is located at one end of the second hole 172 , and the second inlet/outlet hole 132 communicates with the center of the second hole 172 , but the first The inlet and outlet holes 131 are blocked from the central portion of the second hole 172 by the fourth sealing member 152 .

The third piston 113 moves from one side of the third cylinder 103 to the other side, and flows into the second hole 172 from the first hole 171 through the hole communication path 178 . Water is supplied to one side of the third cylinder 103 through the second outlet hole 132 .

The water stored in the other side of the third cylinder 103 is pressure-discharged through the first inlet/outlet hole 131 , the second connection hole 181 of the second hole 172 , and the first discharge path 160 . , is injected in the other direction of the second cylinder 102 through the first injection hole 201A and the second injection hole 204A to 204E. The pressurized water provides a crushing force for excavation of the ground. In addition, the pressurized water may impart a rotational force to the dispersion unit 204 of the injection module 200 .

At this time, the pressure of the water discharged through the second connection hole 181 is the cross-sectional area of the empty space inside the first cylinder 101 and the second cylinder 102 of the empty space inside the third cylinder 103 . The pressure can be increased by the pressure increase ratio divided by the cross-sectional area.

For example, it is assumed that the inner diameter of the first cylinder 101 and the second cylinder 102 is 80 mm, the inner diameter of the third cylinder 103 is 21.5 mm, and the diameter of the common rod 114 is 20 mm. do. Then, the water pressure increase ratio is the cross-sectional area (80 ² - 20 ² ) of the empty space inside the first cylinder 101 and the second cylinder 102 and the cross-sectional area (21.5 ² ) of the empty space inside the third cylinder 103 It can be calculated as 1991.798, which is a value divided by -20 ² ). This is also the case in the second pressure-increasing mode. As described above, the non-powered boring head 100 according to the present invention can spray water pressurized to an ultra-high pressure even with a mechanical operation by the supplied water without external power supply.

On the other hand, if the direction of the injection module 200 is downward, the non-powered boring head 100 according to the present invention can excavate the ground downward, and if the direction of the injection module 200 is lateral, non-powered boring according to the present invention The head 100 may excavate the ground laterally.

Next, a mechanism in which the pressure-increasing mode of the non-powered boring head 100 is switched from the first pressure-increasing mode to the second pressure-increasing mode will be described.

Before switching from the first pressure-increasing mode to the second pressure-increasing mode, one fixed shaft 143 protruding from the pressure path adjusting member 140 to the other side of the first cylinder 101 and the discharge path adjusting member 150 The one-side fixed shaft 153 protruding to the other side of the first cylinder 101 is pressed by the inertia of the moving first piston 111 (see FIG. 18 ).

Then, the other fixed shaft 144 of the pressing path adjusting member 140 protrudes to one side of the second cylinder 102 , and the other fixed shaft 154 in the discharge path adjusting member 150 is connected to the second cylinder. It protrudes to one side of (102). Then, the pressure-increasing mode of the non-powered boring head 100 is switched from the first pressure-increasing mode to the second pressure-increasing mode (see FIG. 19 ).

For reference, FIGS. 18 and 19 are for explaining a process of switching from the first pressure-increasing mode to the second mode, and only reference numerals necessary for this are illustrated in FIGS. 18 and 19 .

Next, an operation mechanism of the non-powered boring head 100 in the second pressure boosting mode according to the present invention will be described with reference to FIGS. 9 and 10 . For reference, the operation mechanism of the non-powered boring head 100 in the second pressure-increasing mode will be described with reference to FIG. 19 and the operation mechanism in the first pressure-increasing mode.

In the second pressure increasing mode, the first piston 111 and the second piston 112 are located at the other ends of the first cylinder 101 and the second cylinder 102, and the third piston 113 is It is located at the other end of the third cylinder 103 . And the pressure path adjusting member 140 is located at the other end of the first hole 171 , and the discharge path adjusting member 150 is located at the other end of the second hole 172 . And the other fixed shaft 144 of the pressing path adjusting member 140 protrudes toward one side of the second cylinder 102 .

As the pressure path adjusting member 140 is positioned at the other end of the first hole 171 , the first supply hole 174 is moved to the center of the first hole 171 by the first sealing member 141 . and the second supply hole 175 communicates with the central portion of the first hole 171 .

Then, the water supplied to the first hole 171 moves through the second pressurization path 122 and the fourth pressurization path 124 through the second supply hole 175 . Then, the first piston 111 moves from the other end of the first cylinder 101 to one end, and the second piston 112 moves from the other end of the second cylinder 102 to one end, and the third The piston 113 moves from the other end of the third cylinder 103 to one end. That is, the entire piston module 110 moves from the other side to one side inside the non-powered boring head 100 .

At this time, the water filled in the first cylinder 101 is discharged through the first pressurization path 121 , and the water filled in the second cylinder 102 is discharged through the third pressurization path 123 . The water discharged from the first cylinder 101 and the second cylinder 102 is discharged through the second discharge hole 177, the guide paths 177A and 177B, and the second discharge paths 182 and 183. The second cylinder 102 is discharged in the other direction. At this time, the water discharged through the second discharge paths 182 and 183 applies a rotational force to the rotating part 203 of the injection module 200 .

In the second pressure-increasing mode, the discharge path adjusting member 150 is located at the other end of the second hole 172, and the second inlet/outlet hole 132 is formed in the second hole ( 172), but the first outlet hole 131 communicates with the center of the second hole 172.

The third piston 113 moves from the other side of the third cylinder 103 to one side, and the water flowing into the second hole 172 passes through the first outlet hole 131 into the third cylinder ( 103), the water stored at one side of the third cylinder 103 is pressure-discharged through the second inlet/outlet hole 132, and the first connection hole 180 of the second hole 172; It is injected in the other direction of the second cylinder 102 through the first discharge path 160 , the first injection hole 201A, and the second injection hole 204A to 204E. The pressurized water provides a crushing force for excavation of the ground. In addition, the pressurized water may impart a rotational force to the dispersion unit 204 of the spray module 200 .

At this time, the water discharged through the first connection hole 180 is the cross-sectional area of the empty space inside the first cylinder 101 and the second cylinder 102 , and the cross-sectional area of the empty space inside the third cylinder 103 . The pressure can be increased by the pressure increase ratio divided by .

Next, a mechanism in which the pressure-increasing mode of the non-powered boring head 100 according to the present invention is switched from the second pressure-increasing mode to the first pressure-increasing mode will be described.

Before switching from the second pressure-increasing mode to the first pressure-increasing mode, the other fixed shaft 144 protruding from the pressure path adjusting member 140 to one side of the second cylinder 102 and the discharge path adjusting member 150 The other fixed shaft 154 protruding to one side of the second cylinder 102 is pressed by the inertia of the moving second piston 112 .

Then, one fixed shaft 143 of the pressing path adjusting member 140 protrudes to the other side of the first cylinder 101 , and one fixed shaft 153 in the discharge path adjusting member 150 is connected to the first cylinder. (101) protrudes to the other side. Then, the pressure-increasing mode of the non-powered boring head 100 is switched from the second pressure-increasing mode to the first pressure-increasing mode (see FIGS. 5 and 6 ).

That is, the pressure path adjusting member 140, according to the change of the pressure increasing mode, by the first piston 111 and the second piston 112, one side and the other side of the fixed shaft ( The protrusions 143 and 144 are alternately pressed while reciprocating in the longitudinal direction in the first hole 171 .

And the discharge path adjusting member 150, according to the change of the pressure increasing mode, by the first piston 111 and the second piston 112, one side and the other side of the fixed shaft of the discharge path adjusting member 150 ( The protrusions 153 and 154 are alternately pressed while reciprocating in the longitudinal direction in the second hole 172 .

As described above, the non-powered boring head 100 according to the present invention performs both the reciprocating strokes of the piston module 110 based on the pressurization and movement of water flowing in through the inlet path 173, without supply of external power. The first pressure-increasing mode and the second pressure-increasing mode for increasing water pressure may be repeatedly performed.

And since the non-powered boring head 100 according to the present invention has holes and the like provided inside the non-powered boring head 100 for all paths through which water moves for pressure-increasing, it is strong against external force or impact, so it has high durability. and low failure rate.

In addition, the non-powered boring head 100 according to the present invention has the advantage that it can be implemented in a compact size by enabling ultra-high pressure boosting of the supplied water only by mechanical operation by the supplied water.

As described above, although the present invention has been described with reference to limited embodiments and drawings, the present invention is not limited to the above embodiments, and various modifications and variations from these descriptions are provided by those skilled in the art to which the present invention pertains. This is possible.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the following claims as well as the claims and equivalents.

100: no-power boring head 101: first cylinder
102: second cylinder 103: third cylinder
110: piston module
111: first piston 112: second piston
113: third piston 114: common rod
121: first pressure path 122: second pressure path
123: third pressure path 124: fourth pressure path
131: first outlet hole 132: second outlet hole
140: pressure path control member 150: discharge path control member
160: first discharge path 170: central body
180, 181: first and second connection holes 182, 183: second discharge path
190: inlet pipe 200: injection module

Claims (7)

first and second cylinders having a first inner diameter and having the same outer diameter as the central axis; The first and second cylinders have the same outer diameter, are coupled between the first and second cylinders, have a second inner diameter smaller than the first inner diameter therein, and have the same central axis as the first and second cylinders a central body on which a third cylinder is formed; and a first piston inserted into the first cylinder, a second piston inserted into the second cylinder, and a common rod coupled to both ends of the first and second pistons passing through the first to third cylinders. ), including
Water is supplied to the central body from one side of the first cylinder through an inlet path including the barrel section of the first cylinder, and the pressurized water is a first discharge path including the barrel section of the second cylinder is discharged in the other direction of the second cylinder through the The pressure is increased by dividing the cross-sectional area,
In the central body, first to fourth pressure paths connected to both ends of the first and second cylinders for supplying water; a first inlet and outlet hole provided at the other end of the third cylinder and connected to the first discharge path; and a second inlet/outlet provided at one end of the third cylinder and connected to the first discharge path,
In the first pressure-increasing mode, water is supplied through first and third pressurization paths connected to one end of the first and second cylinders so that the first to third pistons move from one end of the corresponding cylinder to the other end, and the third The water pressurized by the piston is discharged to the first discharge path through the first inlet hole,
In the second pressure-increasing mode, water is supplied to the second and fourth pressurization paths connected to the other ends of the first and second cylinders so that the first to third pistons move from the other end of the corresponding cylinder to one end, and the third The water pressurized by the piston is discharged to the first discharge path through the second inlet hole,
According to the pressure increasing mode, water is supplied to the first and third pressure paths or selectively through the second and fourth pressure paths, but the pressure is inserted into the first hole provided in the central body parallel to the third cylinder path control member; and a discharge path adjusting member that selectively communicates the first discharge path with one of the first and second inlet and outlet holes according to the pressure increasing mode, and is inserted into a second hole provided in the central body parallel to the third cylinder further comprising,
In the first hole, the longitudinal center communicates with the inflow path, a first supply hole communicating with the first and third pressing paths is formed on one side, and the second and fourth pressing paths on the other side A second supply hole to communicate is formed,
The pressure path adjusting member is shaft-fixed at one end and the other end of the first hole and has a cylindrical shape movable in the longitudinal direction inside the first hole, and a first sealing member for sealing the first hole in the horizontal direction at one side is coupled, and a second sealing member capable of sealing the first hole in the transverse direction is coupled to the other side,
In the first pressure increasing mode, the pressure path adjusting member is located at one end of the first hole so that the first supply hole communicates with the center of the first hole, but the second supply hole is connected to the first by the second sealing member. Blocked from the center of the hall,
In the second pressure-increasing mode, the pressure path adjusting member is located at the other end of the first hole so that the first supply hole is blocked from the center of the first hole by the first sealing member, but the second supply hole is the first hole. Power-free boring head for ground excavation, characterized in that it communicates with the center.
delete delete delete first and second cylinders having a first inner diameter and having the same outer diameter as the central axis; The first and second cylinders have the same outer diameter, are coupled between the first and second cylinders, have a second inner diameter smaller than the first inner diameter therein, and have the same central axis as the first and second cylinders a central body on which a third cylinder is formed; and a first piston inserted into the first cylinder, a second piston inserted into the second cylinder, and a common rod coupled to both ends of the first and second pistons passing through the first to third cylinders. ), including
Water is supplied to the central body from one side of the first cylinder through an inlet path including the barrel section of the first cylinder, and the pressurized water is a first discharge path including the barrel section of the second cylinder is discharged in the other direction of the second cylinder through the The pressure is increased by dividing the cross-sectional area,
In the central body, first to fourth pressure paths connected to both ends of the first and second cylinders for supplying water; a first inlet and outlet hole provided at the other end of the third cylinder and connected to the first discharge path; and a second inlet/outlet provided at one end of the third cylinder and connected to the first discharge path,
In the first pressure-increasing mode, water is supplied through first and third pressurization paths connected to one end of the first and second cylinders so that the first to third pistons move from one end of the corresponding cylinder to the other end, and the third The water pressurized by the piston is discharged to the first discharge path through the first inlet hole,
In the second pressure-increasing mode, water is supplied to the second and fourth pressurization paths connected to the other ends of the first and second cylinders so that the first to third pistons move from the other end of the corresponding cylinder to one end, and the third The water pressurized by the piston is discharged to the first discharge path through the second inlet hole,
According to the pressure increasing mode, water is supplied to the first and third pressure paths or selectively through the second and fourth pressure paths, but the pressure is inserted into the first hole provided in the central body parallel to the third cylinder path control member; and a discharge path adjusting member that selectively communicates the first discharge path with one of the first and second inlet and outlet holes according to the pressure increasing mode, and is inserted into a second hole provided in the central body parallel to the third cylinder further comprising,
In the second hole, the longitudinal center communicates with the inlet path, one side communicates with the second outlet hole and the first outlet path, and the other end communicates with the first outlet hole and the first outlet path. becomes,
The discharge path adjusting member is shaft-fixed at one end and the other end of the second hole and has a cylindrical shape movable in the longitudinal direction inside the second hole, and a third sealing member for sealing the second hole in the horizontal direction at one side is coupled, and a fourth sealing member capable of sealing the second hole in the transverse direction is coupled to the other side,
In the first pressure-increasing mode, the discharge path adjusting member is located at one end of the second hole so that the first inlet and outlet holes communicate with the center of the second hole, but the second outlet and outlet holes are connected to the second by the fourth sealing member. cut off from the center of the hall,
In the second pressure-increasing mode, the discharge path adjusting member is located at the other end of the second hole so that the second inlet and outlet holes are blocked from the central portion of the second hole by the third sealing member, but the first inlet and outlet holes are the second Powerless boring head for ground excavation, characterized in that it communicates with the center of the hole.
first and second cylinders having a first inner diameter and having the same outer diameter as the central axis; The first and second cylinders have the same outer diameter, are coupled between the first and second cylinders, have a second inner diameter smaller than the first inner diameter therein, and have the same central axis as the first and second cylinders a central body on which a third cylinder is formed; and a first piston inserted into the first cylinder, a second piston inserted into the second cylinder, and a common rod coupled to both ends of the first and second pistons passing through the first to third cylinders. ), including
Water is supplied to the central body from one side of the first cylinder through an inlet path including the barrel section of the first cylinder, and the pressurized water is a first discharge path including the barrel section of the second cylinder is discharged in the other direction of the second cylinder through the The pressure is increased by dividing the cross-sectional area,
In the central body, first to fourth pressure paths connected to both ends of the first and second cylinders for supplying water; a first inlet and outlet hole provided at the other end of the third cylinder and connected to the first discharge path; and a second inlet/outlet provided at one end of the third cylinder and connected to the first discharge path,
In the first pressure-increasing mode, water is supplied through first and third pressurization paths connected to one end of the first and second cylinders so that the first to third pistons move from one end of the corresponding cylinder to the other end, and the third The water pressurized by the piston is discharged to the first discharge path through the first inlet hole,
In the second pressure-increasing mode, water is supplied to the second and fourth pressurization paths connected to the other ends of the first and second cylinders so that the first to third pistons move from the other end of the corresponding cylinder to one end, and the third The water pressurized by the piston is discharged to the first discharge path through the second inlet hole,
According to the pressure increasing mode, water is supplied to the first and third pressure paths or selectively through the second and fourth pressure paths, but the pressure is inserted into the first hole provided in the central body parallel to the third cylinder path control member; and a discharge path adjusting member that selectively communicates the first discharge path with one of the first and second inlet and outlet holes according to the pressure increasing mode, and is inserted into a second hole provided in the central body parallel to the third cylinder further comprising,
In the first pressure-increasing mode, one fixed shaft of the discharge path adjusting member protrudes to the other side of the first cylinder, and one fixed shaft of the pressure path adjusting member protrudes to the other side of the first cylinder,
In the second pressure-increasing mode, the other fixed shaft of the discharge path adjusting member protrudes to one side of the second cylinder, and the other fixed shaft of the pressure path adjusting member protrudes to one side of the second cylinder,
The discharge path adjusting member, according to the change of the pressure increase mode, by the first and second pistons of the discharge path adjusting member one side and the protrusion of the other fixed shaft is pressed alternately by the reciprocating movement in the longitudinal direction in the second hole and
The pressure path adjusting member is, in accordance with the change of the pressure increasing mode, the protrusions of one side and the other fixed shaft of the pressure path adjusting member are pressed alternately by the first and second pistons to reciprocate in the longitudinal direction in the first hole. A non-powered boring head for ground excavation, characterized in that.
first and second cylinders having a first inner diameter and having the same outer diameter as the central axis; The first and second cylinders have the same outer diameter, are coupled between the first and second cylinders, have a second inner diameter smaller than the first inner diameter therein, and have the same central axis as the first and second cylinders a central body on which a third cylinder is formed; and a first piston inserted into the first cylinder, a second piston inserted into the second cylinder, and a common rod coupled to both ends of the first and second pistons passing through the first to third cylinders. ), including
Water is supplied to the central body from one side of the first cylinder through an inlet path including the barrel section of the first cylinder, and the pressurized water is a first discharge path including the barrel section of the second cylinder is discharged in the other direction of the second cylinder through the The pressure is increased by dividing the cross-sectional area,
In the central body, first to fourth pressure paths connected to both ends of the first and second cylinders for supplying water; a first inlet and outlet hole provided at the other end of the third cylinder and connected to the first discharge path; and a second inlet/outlet provided at one end of the third cylinder and connected to the first discharge path,
In the first pressure-increasing mode, water is supplied through first and third pressurization paths connected to one end of the first and second cylinders so that the first to third pistons move from one end of the corresponding cylinder to the other end, and the third The water pressurized by the piston is discharged to the first discharge path through the first inlet hole,
In the second pressure-increasing mode, water is supplied to the second and fourth pressurization paths connected to the other ends of the first and second cylinders so that the first to third pistons move from the other end of the corresponding cylinder to one end, and the third The water pressurized by the piston is discharged to the first discharge path through the second inlet hole,
According to the pressure increasing mode, water is supplied to the first and third pressure paths or selectively through the second and fourth pressure paths, but the pressure is inserted into the first hole provided in the central body parallel to the third cylinder path control member; and a discharge path adjusting member that selectively communicates the first discharge path with one of the first and second inlet and outlet holes according to the pressure increasing mode, and is inserted into a second hole provided in the central body parallel to the third cylinder further comprising,
In the central body, a plurality of second discharge paths symmetrically provided in the barrel of the second cylinder for water discharged from the first and second cylinders through the second and fourth pressure paths in the first pressure increase mode are provided. a first discharge hole for discharging in the other end direction of the second cylinder; and a second for discharging water discharged from the first and second cylinders through the first and third pressure paths in the second pressure increasing mode to the other end direction of the second cylinder through the plurality of second discharge paths. The discharge hole is further formed,
an injection unit extending from the other side of the second cylinder and receiving the pressurized water discharged through the first discharge path and injecting it through a first injection hole having the same central axis as the second cylinder; a rotating unit coupled to the bearing to the injection unit and generating a rotational force by water discharged through the plurality of second discharge paths; and a spray module rotatable together with the rotating part, the spray module comprising a dispersion part for dispersing and spraying the pressurized water sprayed through the first spray hole through a plurality of second spray holes, the ground Powerless boring head for excavation.

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