KR20170061382A - Apparatus and Method for installation of submarine cable and Method for measuring burial depth of submarine cable - Google Patents

Abstract

The present invention relates to a submarine cable installation apparatus, a submarine cable installation method using the same, and a submarine cable depth determination method.
A submarine cable installation apparatus according to the present invention comprises: a device body connected to a ship of a watercraft and seated on a seabed surface; sensor means provided on the device body for sensing a submarine cable provided on the seabed or the sea floor; An excavating unit provided in the apparatus body for excavating a bottom surface around the submarine cable with a high-pressure fluid; and a suction unit provided in the apparatus body for sucking the gravel around the submarine cable at the same time as the excavating unit, Suction means for discharging the liquid to the outside of the apparatus body; And a selecting means which is provided in the apparatus body so as to be in contact with the sea floor and performs flattening of the bottom surface by the self weight of the apparatus body, wherein the apparatus body can be seated on top of the submarine cable .

Description

TECHNICAL FIELD [0001] The present invention relates to a submarine cable installation apparatus, a submarine cable installation method, and a submarine cable installation method using the submarine cable installation apparatus,

The present invention relates to a submarine cable installation apparatus, and a submarine cable installation method and a depth determination method using the submarine cable installation apparatus.

Transmission and distribution submarine cables are to be installed on the seabed to smoothly supply power to the island area. The submarine cable to be constructed in Korea is expected to increase sharply due to the construction of a large scale offshore wind farm power network.

Submarine cables are mostly buried in the seabed by an installation system because they are to be safely protected from natural disasters caused by typhoons, terrain influences, and artificial hazards such as fishing activities or anchoring of ships.

In the case of domestic submarine cables, judging the suitability and safety of the buried condition is judged as "burial depth". Especially, how to accurately and economically measure the depth of buried submarine cable embedded in the sea floor becomes an important issue have.

On the other hand, in the case of excavating trenches on the sea floor, it is possible to approximate the approximate depth of buried depth of the submarine cable by measuring the depth of trenches in the construction stage. However, in case of subsoil, Submarine cables are installed in a buried or simultaneous buried system.

In this case, a submarine cable is installed using a water jet spraying method or a plow type installation device. In order to confirm the suitability of the submarine cable construction, the buried depth test tip and the equipment are separately constructed, And the time and cost for completing the submarine cable are large.

An object of the present invention is to provide an apparatus and a method for combining an underwater cable installation work and a buried depth measurement work.

In particular, it is an object of the present invention to enable the installation of a submarine cable and the depth of buried measurement with the same apparatus, and to enable burial depth measurement after installation.

Thus, the object of the present invention is to reduce the time and cost required for the submarine cable installation work and burial depth measurement work.

The present invention relates to a submarine cable installation apparatus, a submarine cable installation method using the same, and a submarine cable depth determination method.

A submarine cable installation apparatus according to the present invention comprises: a device body connected to a ship of a watercraft and seated on a seabed surface; sensor means provided on the device body for sensing a submarine cable provided on the seabed or the sea floor; An excavating unit provided in the apparatus body for excavating a bottom surface around the submarine cable with a high-pressure fluid; and a suction unit provided in the apparatus body for sucking the gravel around the submarine cable at the same time as the excavating unit, Suction means for discharging the liquid to the outside of the apparatus body; And a selecting means which is provided in the apparatus body so as to be in contact with the sea floor and performs flattening of the bottom surface by the self weight of the apparatus body, wherein the apparatus body can be seated on top of the submarine cable .

Preferably, the high pressure pump provided in the apparatus body, the spray pipe connected to the high pressure pump provided in the auxiliary body and extending toward the bottom surface around the submarine cable, And a spray nozzle provided in the spray tube for spraying a fluid.

More preferably, the suction means comprises: a suction pump provided on the apparatus body; a suction pipe connected to the suction pump, the suction pipe being provided on the auxiliary body so as to be disposed on the submerged cable; And a discharge pipe connected to the suction pipe, the discharge pipe extending so that the discharge port is spaced apart from the outer circumference of the apparatus body.

More preferably, the suction means further comprises: a valve unit provided on a passage connected to the suction pipe and the discharge pipe, the suction unit opening and closing the connection passage, wherein the valve unit is connected to the suction pump and the discharge pipe, When the connected passage is opened, the discharge pipe can be provided with the gas sucked and discharged to the suction pipe.

More preferably, the suction pipe and the discharge pipe may be inclined downward.

More preferably, the leveling means comprises: a leveling member provided to be in contact with the sea floor at a lower portion of the apparatus body, and to be moved in the longitudinal direction of the submarine cable; And a roller member provided at a lower portion of the apparatus body to press the bottom surface of the apparatus body.

Preferably, the sensor further comprises: a first sensor provided at a tip of the auxiliary body for sensing a position of the submarine cable; a second sensor provided in the auxiliary body for sensing a position of the submarine cable; And a third sensor provided in the apparatus body and sensing a depth of the submarine cable after the gravel is discharged to the suction pipe.

More preferably, at least one of the first sensor, the second sensor and the second sensor may be a magnetic sensor.

More preferably, the leveling means may be disposed between the suction pipe and the second sensor or between the discharge pipe and the second sensor in the longitudinal direction of the submarine cable in the apparatus body.

On the other hand, the present invention as another aspect provides a submarine cable installation method using a submarine cable installation apparatus.

A method of installing a submarine cable according to the present invention comprises the steps of: a first step of moving the device body in an excavation direction in a direction of one side of the submarine cable; and a step of supplying a high-pressure fluid to the injection pipe and the injection nozzle, A second stage of the installation; And a third step of opening only the passage connecting the suction pump and the suction pipe to the valve unit to suck and discharge the excavated soil in the second step of the installation, The steps may be performed simultaneously.

On the other hand, the present invention as another aspect provides a submarine cable depth detection method using a submarine cable installation apparatus.

The method for detecting depth of submarine cable according to the present invention includes: a first detection step of moving the apparatus body in a direction toward the other side of the submarine cable; and a detection step of detecting a high pressure fluid supplied to the injection pipe and the injection nozzle A third step of opening only a passage through which the suction pump and the discharge pipe are connected to the valve unit, re-sucking the discharged gravel to the discharge pipe and discharging the gravel to the suction pipe; And a fourth checking step performed after completion of the third checking step to press the bottom surface with the device body and to detect the depth of embedding of the submarine cable.

Preferably, the fourth detecting step is a step 4-1 of detecting the bottom surface of the vessel by flattening the bottom surface of the suction pipe or the discharge pipe in a direction of movement of the apparatus body, A fourth step of detecting the bottom surface of the bottom surface by the roller member disposed downstream of the leveling member; And a detecting step of detecting the depth of embedding of the submarine cable by the sensor means disposed downstream of the roller member in a moving direction of the apparatus body.

According to the present invention, it is possible to minimize the ends and equipment necessary for the installation work of the submarine cable and the buried depth measurement work.

In addition, since the depth of burial can be measured after the installation of the submarine cable, it is possible to shorten the working time and reduce the cost to be consumed.

In addition, the accuracy of the measurement of the depth of buried cable of the submarine cable is improved, and it is possible to easily judge whether the submarine cable is in a state of being embedded or not.

1 is a perspective view of a submarine cable installation apparatus according to a preferred embodiment of the present invention.
2 is a conceptual diagram of a submarine cable installation apparatus according to a preferred embodiment of the present invention.
3 is a front view showing an excavation state of a submarine cable installation apparatus according to a preferred embodiment of the present invention.
4 is a side view showing an excavation state of a submarine cable installation apparatus according to a preferred embodiment of the present invention.
FIG. 5 is a front view showing a buried and inspected state of a submarine cable installation apparatus according to a preferred embodiment of the present invention. FIG.
FIG. 6 is a side view showing the buried and inspected state of a submarine cable installation apparatus according to a preferred embodiment of the present invention.
7 is a conceptual diagram of a submarine cable installation method according to a preferred embodiment of the present invention.
8 is a conceptual diagram of a method of detecting the depth of a submarine cable according to a preferred embodiment of the present invention.

In order to facilitate an understanding of the description of the embodiments of the present invention, elements denoted by the same reference numerals in the accompanying drawings are the same element, and among the elements having the same function in each embodiment, Respectively.

Further, in order to clarify the gist of the present invention, a description of elements and techniques well known in the prior art will be omitted, and the present invention will be described in detail with reference to the accompanying drawings.

It is to be understood, however, that the spirit and scope of the present invention are not limited to the embodiments shown, but may be suggested by those skilled in the art in other forms, additions, or alternatives, .

1, a submarine cable installation apparatus 100 according to a preferred embodiment of the present invention includes a device body 110 (not shown) connected to a ship (not shown) A sensor unit 120 provided in the apparatus body 110 and sensing a submarine cable 10 provided on the seabed or the sea bed; (130) for excavating the bottom surface of the cable around the cable, and an exhaust pipe (130) provided in the apparatus body (110) for sucking the soil around the submarine cable (10) A suction means 140 for discharging the air to the outside of the apparatus body 110 and a picking means 160 provided on the apparatus body 110 to contact the bottom surface and performing flattening of the bottom surface by the self weight of the apparatus body .

The submarine cable installation device 100 is lowered to the sea floor by using the cable 20 and the device body 110 connected to the cable 20 is lowered by the seabed. Then, the device body 110 connected to the bus (not shown) by the cable 20 can be pulled like a sled on the sea floor by the bus bar moving in the water.

When the apparatus body 110 is provided as a type that is attracted as a sled, there is no need to input an expensive submersible to the sea bed, thereby reducing the related cost. When the apparatus body 110 is brought into contact with the sea floor, Since the ground is toughened, it has the effect of stabilizing the ground where the submarine cable is installed.

Preferably, the cable 20 connecting the busbars (not shown) and the device body 110 may be provided to be wound or unwound from the busbars and may be provided with a variable length, The length of the cable 20 connected to the apparatus body 110 can be adjusted to move the apparatus body 110 on the sea floor.

 The device body 110 may be electrically connected to the bus bar via the cable 20 to receive power required for the installation and burial depth detection of the submarine cable 10 from the bus bar. It is possible to control the submarine cable installation apparatus 100 existing in the seabed and to transmit and receive position information by a sensor described later.

At this time, the submarine cable 10 may be positioned on the sea floor in advance before descending the apparatus body 110. A test current can be injected into the submarine cable 10 in advance and the first sensor 121 and the second sensor 122 can detect a magnetic field generated by a current. The first sensor 121 and the second sensor 122 may be a magnetic sensor capable of sensing a magnetic field generated around the submarine cable 10.

The first sensor 121 and the second sensor 122 detect the magnetic field around the submarine cable 10 and store the position of the submarine cable 10 as the plane coordinate values (x, y) City).

The busbars (not shown) read the plane coordinate values (x, y) of the submarine cable 10 stored by the first sensor 121 and the second sensor 122, .

When the busbar moves from the waterfront, the device body 110 connected to the busbar by the cable 20 is also dragged from the bottom of the sea floor. At this time, the busbars can be positioned directly above the submarine cable 10 by adjusting the length of the cable 20, even if the busbars are not moved directly from the watercraft.

The submarine cable installation apparatus 100 located directly above the submarine cable 10 can excavate the bottom surface around the submarine cable 10 by injecting high pressure fluid. Preferably, water may be used as the high-pressure fluid, but this is not limited to the present invention, but may be suitably modified and applied by those skilled in the art.

When the undersurface cable 10 is preliminarily placed on the seabed surface and a high pressure fluid is sprayed to excavate the bottom surface around the submarine cable 10, the submarine cable 10 falls downward due to its own weight, . Such a submarine cable installation method can be easily used when the submarine lipid is composed of a soft layer such as a soil layer.

In order to install the submarine cable 10 in this manner, a preferred embodiment of the present invention provides a submarine cable installation apparatus 100 as shown in FIG.

An auxiliary body 111 is connected to an upper part of the apparatus body 110 positioned directly above the submarine cable 10 and a high pressure pump 131 for supplying a high pressure fluid to the inside of the auxiliary body 111 , And a suction pump (141).

The high pressure pump 131 is connected to the injection pipe 132 and a high pressure fluid is injected through the injection nozzle 133 located at the end of the injection pipe 132 to excavate the bottom surface.

The suction pump 141 is connected to the suction pipe 142 and the discharge pipe 143. The suction pump 141 is connected to the suction pipe 141 and the suction pipe 142, The valve unit 150 may be installed in the passage through which the valve body 143 is connected.

The valve unit 150 is provided to open and close a passage through which the suction pump 141 and the suction pipe 142 are connected and the passage through which the suction pump 141 and the discharge pipe 143 are connected, And can be controlled by the valve unit 150 to be connected to either the suction pipe 142 or the discharge pipe 143.

When the valve unit 150 thus provided is opened to open the passage through which the suction pump 141 and the suction pipe 142 are connected to each other, when the bottom surface is excavated, the high pressure The dust that is scattered by the fluid is sucked through the suction port 145 of the suction pipe 142 and discharged to one side of the device body 110 through the discharge port 145 of the discharge pipe 143, .

On the contrary, when the passage connecting the suction pump 141 and the discharge pipe 143 is opened by controlling the valve unit 150 so that the passage connecting the suction pump 141 and the suction pipe 142 is closed, So that it is possible to suck the gravel through the gravel 145.

Therefore, when the digging pipe 132 is used to excavate the gravel discharged to one side of the apparatus body 110 through the discharge port 145, it is discharged through the suction port 145 of the suction pipe 142 So as to cover the upper portion of the submarine cable 10.

As shown in FIG. 2, the injection pipe 132, the suction pipe 142, and the suction pipe 133 are disposed in the upper portion of the submarine cable 10 to allow the injection nozzle 133 and the suction port 145 to be positioned above the submarine cable 10, The discharge pipe 143 may be provided to be inclined downward.

At this time, the injection pipe 132, the suction pipe 142, and the discharge pipe 143 are provided with a part of a straight line to prevent the soil from flowing backward and being discharged in an undesired direction.

Fig. 3 shows a state in which the submarine cable 10 is installed by the submarine cable installation apparatus according to the preferred embodiment of the present invention.

When the high pressure fluid is sprayed to the periphery of the submarine cable 10 located on the seabed surface 30 through the injection nozzle 133, the gravel is excavated on the seabed surface 30, It sinks to the ground by self weight.

At the same time, the valve unit 150 opens the passage through which the suction pump 141 and the suction pipe 142 are connected to allow the suction of the gravel through the suction port 145. Thus, the gravel excavated by the high-pressure fluid injected from the injection nozzle 133 is directly sucked through the suction port 145, thereby preventing scattering of the gravel.

The gravel sucked through the suction port 145 moves along the suction pipe 142 and is discharged through a discharge port 146 of the discharge pipe 143 at a predetermined distance from the outside of the apparatus body 110, 40). At this time, if the discharge pipe 143 is inclined downward as described above, the discharge of the earth and sand can be smoothly performed.

The first moving body 112 and the second moving body 113 may be inserted into or drawn out from the inside of the auxiliary body 111. The first moving body 112 may be provided at the end of the first moving body 112, And a suction pipe 142 and a discharge pipe 143 may be installed at the end of the second moving body 113. The suction pipe 142 and the discharge pipe 143 may be connected to each other.

The first moving body 112 and the second moving body 113 are provided to be inserted into or drawn out from the auxiliary body 111 so that the injection nozzle 133, the inlet 145, 146 can be adjusted. Specific details related thereto will be described later.

4 shows the movement of the submarine cable installation apparatus according to the present invention when the submarine cable 10 is installed.

The device body 110 is connected to a bus bar (not shown) by a cable 20 and the bus bar (not shown) is connected to the bottom of the device body 110 The apparatus body 110 can be dragged on the surface 30.

Herein, the direction in which the apparatus body 110 moves backward in the longitudinal direction of the submarine cable with respect to the submarine cable 10 that has sunk above the submarine ground 10 immediately above the submarine cable 10 is referred to as the excavation direction, The submarine cable 10 is moved in the direction of excavation in the direction opposite to the longitudinal direction of the submarine cable 10, that is, in the submarine cable 10 in which the apparatus body 110 is directly above the submarine cable 10, Is referred to as a detection direction.

When the apparatus body 110 moves in the detection direction, the periphery of the submarine cable 10 is excavated and the submarine cable 10 is laid on the excavated seabed ground. When the apparatus body 110 is moved in the excavation direction The high-pressure fluid can be continuously injected through the injection nozzle 133 during the movement.

In this way, the high-pressure fluid is injected into the injection nozzle 133, and at the same time, the gravel can be sucked through the suction pipe (142 in FIG. 3) by the above-described method and the gravel can be stacked on one side of the apparatus body 110.

The apparatus body 110 can continue to move in the excavation direction until excavation of the seabed surface 20 is completed and excavation and suction operations by the spray pipe 132 and the suction pipe 142 are also performed in the apparatus body 110, Can be continued while moving.

When the high pressure fluid is injected from the jet nozzle 133 of the jet pipe 132 and the bottom surface 30 is excavated, the submarine cable 10 is dropped by its own weight to the excavated bottom. Then, the submarine cable 10 has a buried depth value z formed in a direction perpendicular to the apparatus body 110. At this time, the buried depth value z may be the distance from the lower surface of the apparatus body 110 to the submarine cable 10 sinking to the seabed ground.

And, preferably, the spray tube 132 may be disposed in front of the apparatus body 110 in the excavation direction while the apparatus body 110 moves in the excavation direction. For this purpose, the position of the injection tube 132 can be controlled by controlling the first moving body 112 provided to move into the interior of the auxiliary body 111.

When the spray tube 132 is disposed before the apparatus body 110 as described above, the spray nozzle 133 installed at the end of the spray tube 132 is disposed in advance of the apparatus body 110, and the spray nozzle 133 It is possible to prevent the interference with the apparatus body 110 when the high-pressure fluid is sprayed from the bottom surface 30, thereby concentrating the high-pressure fluid on the bottom surface 30.

On the other hand, FIG. 5 shows a state in which the soil 40 laminated on the submarine cable 10 submerged in the excavated subsoil is covered and laid.

The valve unit 150 is controlled to open the passage connecting the suction pump 141 and the discharge pipe 143 and to close the passage connecting the suction pump 141 and the suction pipe 142. [

Then, the passage through which the suction pump 141 and the discharge pipe 143 are connected is opened, and the operation of the suction pump 141 enables the suction to the discharge pipe 143. Therefore, the soil 40 stacked on the lower part of the discharge port 146 is sucked into the discharge port 146, passes through the discharge pipe 143, falls through the suction pipe 142, and is discharged to the suction port 145. At this time, the operation of the high-pressure pump 131 is stopped and the high-pressure fluid injection operation through the injection nozzle 133 can be stopped.

This is an operation performed when the apparatus body 110 moves in the direction of the inspection, which is the direction opposite to the excavation direction, as shown in FIG. 6, and preferably, while the apparatus body 110 moves in the detection direction .

At this time, the second moving body 113 can be moved from the inside of the auxiliary body 111 and drawn out so that the discharge pipe 143 is positioned at the best end in the detection direction. For this purpose, a guide protrusion 114 may be provided on one side of the second moving body 113, and a guide groove (not shown) may be formed in the auxiliary body 111 to engage with the guide protrusion 114 .

The tilting member 161 disposed behind the discharge pipe 143 in the detection direction contacts the underside surface 30 and presses the underside surface 30 by the weight of the apparatus body 110, The bottom surface 30 can be even.

Preferably, the tilting member 161 is adapted to be inserted or withdrawn into the interior of the apparatus body 110 by the moving member 165. A guide protrusion 164 may be provided on one side of the moving member 165 and a guide groove (not shown) may be provided on the inside of the apparatus body 110 to engage with the guide protrusion 164 have.

According to the guide protrusions 114 and 164 and the guide groove (not shown), the second moving body 113 and the moving member 165 can move smoothly without departing from the moving path.

The moving distance of the shifting member 165 may be determined by the shifting member 161. That is, the moving member 165 may be drawn out from the apparatus body 110 so that the tilting member 161 is disposed behind the discharge pipe 143 in the detection direction.

With this arrangement, the bottom surface 30 can be evenly moved while the apparatus body 110 moves in the detection direction without a separate apparatus.

The gravel-like material 40 stacked on the outer side of the apparatus body 110 is sucked into the discharge pipe 143 and supplied to the upper portion of the submarine cable 10 while the apparatus body 110 moves in the detection direction, Whereby the upper portion of the submarine cable 10 is covered with the gravel.

Thereafter, the sanding member 161 is passed over the ruggedly covered sand, pushing the remaining sand to the bottom of the submarine cable 10, and pressing the bottom surface 30 by the self weight of the apparatus body 110 The soil 40 is flattened.

6, a roller member 162 provided on the apparatus body 110 may be provided to press the bottom surface 30 again. The roller member 162 may be connected to the apparatus body 110 by a connection shaft 163 so that the roller body 162 can be rotated by the movement of the apparatus body 110. The connection shaft 163 may be connected to the apparatus body 110 by a bearing (not shown).

At this time, a discharge pipe 143 is located at the most distal end in the detection direction, a tilting member 161 is positioned behind the discharge pipe 143, and the roller member 162 is positioned behind the tilting member 161 There is an effect that the bottom surface 30 can be flattened by pressing the soil 40 while the apparatus body 110 moves in the detection direction without any additional apparatus.

When the bottom surface of the seabed surface 30 is completely flattened by covering the gravel with the gravel on the bottom cable 10, the submarine cable 10 is moved through the third sensor 123 installed on one side of the apparatus body 110, (Z in Fig. 4) of the above-mentioned buried depth.

The third sensor 123 may be disposed at the rear end of the apparatus body 110 in the detection direction. The third sensor 123 may be disposed at the rear end of the apparatus body 110, It is possible to measure the buried depth value of the submarine cable 10.

The third sensor 123 may be a magnetic sensor that senses a magnetic field generated by a current flowing in the submarine cable 10. According to the third sensor 123 thus configured, the submarine cable 10 The buried depth value of the submarine cable 10 can be measured immediately after the burial operation of the submarine cable 10 is completed.

When the flattening operation of the seabed surface 30 is completed, the first sensor (121 of FIG. 5) and the second sensor 122 measure the depth value of the submarine cable 10 by the third sensor 123, (X, y) of the submarine cable by means of the submarine cable 10, whereby the x, y and z coordinate values of the submarine cable 10 can be measured.

Therefore, it is not necessary to insert a separate device to measure the depth of buried depth of the submarine cable 10, and it is possible to complete the excavation, burial and burial depth measurement of the submarine cable 10 with one device, The time and cost consumed in the installation work of the cable 10 can be reduced.

On the other hand, the present invention as another aspect provides a submarine cable installation method as shown in Fig.

The submarine cable installation method according to a preferred embodiment of the present invention can use the submarine cable installation apparatus 100 described above and includes an installation first step S110 for moving the apparatus body in an excavation direction in one direction of the submarine cable (S120) for supplying a high-pressure fluid to the injection pipe and the injection nozzle to excavate the bottom surface of the submerged pipe, and opening only a passage connecting the suction pump and the suction pipe to the valve unit, And a third step S130 of sucking and discharging the excavated soil in step S120.

At this time, since the operation of excavating the bottom surface and the operation of sucking the soil can be performed at the same time, the second placing step S120 and the third placing step S130 can be performed at the same time.

In addition, in the third step S130, the soil can be stacked on the outer side of the apparatus body. After the completion of the third step S130, the second step S120 is not performed (Not shown) for moving the apparatus body in a direction different from that of the first installation step S110 while re-sucking the gravels deposited in the third installation step S130 and covering the upper part of the submarine cable, Can be performed.

After completion of the re-suction step, a flattening step (not shown) for flattening the bottom surface of the apparatus body using the self weight of the apparatus body may be performed.

On the other hand, the present invention provides a submarine cable depth detection method using the submarine cable installation apparatus. The method for detecting the depth of a submarine cable according to the present invention can be carried out by using the submarine cable installation apparatus alone or after the submarine cable is installed by the submarine cable installation method using the submarine cable installation apparatus.

In addition, the method for detecting the depth of a submarine cable according to the present invention can be carried out simultaneously with the installation of a submarine cable by the submarine cable installation method using the submarine cable installation apparatus or immediately after the completion of the installation.

6 and 8, the method for detecting the depth of a submarine cable according to the present invention includes a first detecting step S210 for moving the apparatus body 110 in the other direction of the submarine cable 10, that is, (S220) for controlling the valve unit so as to block the high-pressure fluid supplied to the injection pipe and the injection nozzle, and a second step of controlling the valve unit to open only the passage connecting the suction pump and the discharge pipe (143) A third step S230 of inspecting and discharging the gravels 40 discharged to the discharge pipe 143 to the suction pipe, and a third step S230 of performing the inspection after completing the third inspection step. 30) and detecting the embedment depth of the submarine cable 10, that is, the depth of buried depth (z in FIG. 4).

The direction in which the apparatus body 110 moves in the first detection step S210 is a direction opposite to the longitudinal direction of the submarine cable 10 in a direction in which the apparatus body 110 moves in the first stage of the installation .

The fourth sensing step S240 may include sensing the pressure of the bottom surface 30 by the tilting member 161 disposed in a downstream direction of the discharge pipe 143 in the moving direction of the apparatus body 110, 4-1 step S241 and step 4-2 of detecting the bottom surface 30 with a roller member 162 disposed rearwardly of the tilting member 161 in the moving direction of the apparatus body 110 (S242) for detecting the depth of embankment of the submarine cable, and a detecting step 4-3 (S243) for detecting the depth of embedding of the submarine cable by sensor means disposed downstream of the roller member in the moving direction of the apparatus body.

As shown in FIG. 6, the tilting member 161 is configured to be inserted into the inside of the apparatus body 110 or to be partially drawn out from the inside of the apparatus body 110, and is slid in a direction parallel to the bottom surface 30 Can be configured to move.

For this purpose, the guide protrusion 164 may be provided on one side of the guide member 161, and a guide groove (not shown) may be provided in the apparatus body 110 to engage with the guide protrusion 164 . However, this is according to a preferred embodiment of the present invention, and the guide protrusion 164 and the guide groove (not shown) are not limited to the present invention.

The roller member 162 is moved by the movement of the apparatus body 110 onto the underside surface 30 once stretched by the tilting member 161. [ The roller member 162 is connected to the apparatus body 110 by a connection shaft 163 and rotates by the movement of the apparatus body 110 to press the underside surface 30 to flatten the uneven bottom surface.

Thereafter, the depth of buried depth of the submarine cable 10 (burial depth value, z in FIG. 4) can be detected on the flattened bottom surface 30 through the sensor means. Preferably, the sensor means may be provided to a magnetic sensor (third sensor) 123 arranged laterally to the roller member 162 in the detection direction, in which case current is flowed through the submarine cable 10 So that a magnetic field can be generated around the submarine cable 10.

When the depth of buried depth of the submarine cable 10 (burial depth value, z in FIG. 4) is measured after the bottom surface 30 is flattened by the tilting member 161 and the roller member 162, The accuracy of the measurement can be improved.

5) of the submarine cable 10 by the sensor means (first sensor, 121 of FIG. 5) (second sensor, 122 of FIG. 6) provided on the apparatus body 110 or the auxiliary body 111 (x, y) can be detected and stored.

Then, the x, y and z coordinate values of the submarine cable 10 stored by the sensor means (the first sensor, the second sensor and the third sensor) are received from the bus line connected to the device body 110 by the cable 20 The buried depth of the submarine cable 10 can be detected.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It will be apparent to those of ordinary skill in the art.

10: Submarine cable 20: Mothership
30: Submarine surface 100: Submarine cable installation device
110: device body 111: auxiliary body
120: sensor means 121: first sensor
122: second sensor 123: third sensor
130: Excavation means 131: High pressure pump
132: jet tube 133: jet nozzle
140: Suction means 141: Suction pump
142: suction pipe 143: discharge pipe
150: valve unit 160: selecting means

Claims (13)

A device body connected to the ship of the watercraft and seated on the sea floor;
Sensor means for detecting a submarine cable provided in the apparatus body and provided on the seabed or the sea floor;
Excavating means provided on the apparatus body for excavating a bottom surface around the submarine cable with a high-pressure fluid;
Suction means provided in the apparatus body for sucking the soil around the submarine cable at the same time as excavation of the excavating means and discharging it to the outside of the apparatus body; And
And a trenching means provided in the device body for contacting the bottom surface and performing flattening of the bottom surface by the self weight of the device body,
The apparatus body includes:
Wherein the submarine cable is seated on top of the submarine cable.
The method according to claim 1,
The suction means
And is supplied to re-suck the discharged soil and supply it to the submarine cable,
The apparatus body includes:
Wherein the cable is connected to a ship of the watercraft and is provided to move in one direction of the submarine cable and the other direction of the submarine cable.
3. The method of claim 2,
The apparatus body includes:
And an auxiliary body provided to be moved in the longitudinal direction of the submarine cable,
The excavating means comprises:
A high pressure pump provided in the apparatus body;
A spraying pipe provided on the auxiliary body and connected to the high-pressure pump, the spraying pipe extending toward a bottom surface around the submarine cable; And
A spray nozzle provided in the spray tube for spraying a fluid;
Wherein the submarine cable installation device comprises:
The method of claim 3,
The suction means
A suction pump provided in the apparatus body;
A suction pipe connected to the suction pump, the suction pipe being provided on the auxiliary body so as to be disposed on the submarine cable; And
A discharge pipe connected to the suction pipe and extending such that the discharge port is spaced apart from the outer periphery of the device body;
Wherein the submarine cable installation device comprises:
5. The method of claim 4,
The suction means
And a valve unit provided on the passage connected to the suction pipe and the discharge pipe, the valve unit opening and closing the connection passage,
Wherein when the valve unit opens a passage connecting the suction pump and the discharge pipe, the discharge unit is provided with a discharge port for discharging the gravel to the suction pipe.
6. The method of claim 5,
Wherein the suction pipe and the discharge pipe are connected to each other,
Wherein the cable is installed inclined downward.
The method according to claim 6,
Wherein said selecting means comprises:
A tilting member provided to be in contact with a bottom surface of the bottom of the apparatus body and moved in the longitudinal direction of the submarine cable; And
A roller member provided at a lower portion of the apparatus body to press the bottom surface;
Wherein the submarine cable installation device comprises:
8. The method of claim 7,
Wherein the sensor means comprises:
A first sensor provided at a tip of the auxiliary body to sense a position of the submarine cable;
A second sensor provided on the auxiliary body for sensing a position of the submarine cable; And
A third sensor provided in the apparatus body for sensing the depth of the submarine cable after the gravel is discharged to the suction pipe;
Wherein the submarine cable installation device comprises:
9. The method of claim 8,
Wherein at least one of the first sensor, the second sensor, and the second sensor is a magnetic sensor.
10. The method of claim 9,
Wherein said selecting means comprises:
Wherein the submarine cable is disposed between the suction pipe and the second sensor or between the discharge pipe and the second sensor in the longitudinal direction of the submarine cable in the apparatus body.
A method for installing a submarine cable in a seabed with a submarine cable installation apparatus according to any one of claims 7 to 10,
A first installation step of moving the apparatus body in an excavation direction which is one direction of the submarine cable;
A second step of supplying a high-pressure fluid to the spray tube and the spray nozzle to excavate the bottom surface; And
A third step of opening only a passage connecting the suction pump and the suction pipe to the valve unit to suck and discharge the excavated soil in the second stage of the installation;
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Wherein the second placing step and the third placing step are carried out simultaneously.
A method of detecting the depth of a submarine cable using a submarine cable installation apparatus according to any one of claims 7 to 10,
A first detecting step of moving the apparatus body in a direction toward the other side of the submarine cable;
A second step of blocking a high-pressure fluid supplied to the injection tube and the injection nozzle;
A third step of opening only a passage connecting the suction pump and the discharge pipe to the valve unit, re-sucking the discharged gravel to the discharge pipe and discharging the gravel to the suction pipe; And
A fourth step of detecting the depth of buried submarine cable by pressing the bottom surface with the apparatus body after completion of the third checking step;
A method of detecting depth of submarine cable.
13. The method of claim 12,
The fourth checking step
(4-1) a step of flattening the bottom surface of the bottom of the suction pipe or the discharge pipe in a direction of movement of the apparatus body;
A fourth detecting step of pressing the bottom surface of the sea bed with the roller member disposed after the leveling member in a moving direction of the apparatus body; And
A fourth step of detecting the depth of embedding of the submarine cable with the sensor means disposed downstream of the roller member in a moving direction of the apparatus body;
Wherein the depth of the undersea cable is measured.

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