JP2001080574A - Method of guiding and installing burying machine to subaqueous cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of guiding and installing a burying machine to an subaqueous cable making watch and guide by a diver unnecessary and improving working efficiency remarkably and achieving a sharp cost reduction. SOLUTION: In postburying a subaqueous cable 12 landed on a bottom based on a designated laying route by a burying machine, an underwater robot (ROV) 16 is advanced toward the subaqueous cable 12 landed on the bottom and is located around the subaqueous cable 12. Images taken by an underwater camera and detection results by a magnetic sensor are transmitted to a towing boat 8 and the transmitted images and detection results by a magnetic sensor are monitored on the towing board 8 to confirm location and situation of a subaqueous cable 10. A burying machine 14 is discharged from the towing boat 8 into underwater. Action command to the burying machine 14 is given from on-board while images taken by a camera of the underwater ROV 16 are being monitored, and the burying machine 14 is guided toward the subaqueous cable 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a buried underwater cable, such as a submarine cable, which is attached to the bottom of the water according to a predetermined laying route, which can be propelled in any direction underwater and whose operation can be remotely controlled from a ship. The present invention relates to a method for inductively mounting a burial machine to a submarine cable suitable for use when burial is performed by a machine.

[0002]

2. Description of the Related Art When burying a water bottom (sea bottom) cable, the cable is previously installed on the water bottom (sea bottom), a burial machine is attached to the cable, and the cable is installed in a trench excavated by the burial machine. There is a later burial method. In general, in the post-burial method, when the burial machine is mounted on the cable, as shown in FIG. 5, the underwater cable b is extended from the laying boat a so as to land, and the burial machine d is immersed in the water from the burying boat c. At this time, it is usual that the user is guided under inspection and monitoring by the diver e because of underwater, and the mounting operation is performed by handling the diver e.

[0003]

However, the work of mounting the burial machine to the cable b is performed by a diver underwater. However, when the diver is underwater (when the depth is more than 30 m),
There is a drawback that a saturated diving method is required, and the burden is large in terms of time and cost. In other words, in the saturated diving method, a living room that can adjust the pressure is installed on a barge above the water, and divers work on the seabed under high pressure in the living room. Heavy burden. Also, even in shallow seas, diver work takes time and may not be possible depending on sea conditions.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a submarine cable that can significantly improve work efficiency by not requiring a diver's monitoring and guidance work and can achieve significant cost reduction. This is a method of guiding and mounting burial machines.

[0005]

The present invention has the following arrangement to achieve the above object. The present invention relates to a submarine cable that is settled on the bottom of the water according to a predetermined installation route,
Underwater surveillance that can be moved in any direction in the water by mounting an underwater camera and cable detector when buried underwater with a buried machine that can be propelled in any direction in the water and the operation can be remotely controlled from the ship The underwater monitoring moving body is moved around the underwater monitoring cable by the moving vehicle, and the captured image of the underwater camera and the detection result of the detector are transmitted to the surface ship. Then, the transmitted photographed image and the detection result are monitored on the ship, the position and status of the underwater cable are confirmed, and an operation command is sent to the buried machine while monitoring the camera photographed image from the underwater monitoring moving body. Guidance of a buried machine to a submarine cable characterized by directing the buried machine to the submarine cable by issuing a command from the ship and operating the submarine cable to the buried machine A mounting method. Further, in the present invention, after performing the work of mounting the buried machine to the underwater cable, the bottoming state of the buried machine and the mounting state to the underwater cable,
The underwater monitoring moving body can monitor and confirm the entire surroundings of the buried machine.

According to the present invention, when an underwater cable laid on the bottom of the water is buried by the burying machine, the image captured by the underwater camera and the detection result of the detector are transmitted to the surface ship and transmitted. The captured image and the detection result are monitored on board to confirm the position and status of the underwater cable. Then, while monitoring the camera image from the underwater monitoring mobile unit, an operation command is issued from the ship to the buried machine to guide the buried machine toward the underwater cable and attach the underwater cable to the buried machine. Operate work. Therefore, it is possible to accurately monitor the underwater cable and the buried machine without the need for the diver to perform the dive work, and to guide the buried machine to the underwater cable according to the monitoring information to perform the mounting work. Therefore, the monitoring and guidance work by the diver is not required, and the work efficiency is remarkably improved, and a significant cost reduction can be achieved.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 and FIG. 2 show an embedding machine 1 in a submarine cable 12 such as a submarine cable according to the present embodiment.
FIG. 3 is an explanatory view of a burying machine 14 used in this method, and FIG. 4 is an explanatory view of an underwater monitoring underwater robot (ROV: Remotely Operated Vehicle) 16.

As shown in FIG. 3, the burying machine 14 has, on both sides in the width direction, an elongated sled-shaped portion 18 which is in contact with the water bottom 10.
And a support frame 20 for connecting and supporting the two sled portions 18, 18 in a bridge-like manner with each other, and provided between the sled portions 18, 18 on both sides of the main body 22. A plurality of thrusters (propulsion units) 26 for tilting with respect to the main body 22 and excavating a water jet by jetting a water jet to excavate a groove in the water bottom 10, and for moving the burying machine 14 underwater; A signal transmission device 28 (contained in a box 28a) for transmitting and receiving control signals to and from the ship 8, and underwater cameras 30f, 3 for confirming the front and rear.
0r is provided so that it can be propelled in any direction underwater and the operation can be remotely controlled from the towing vessel 8. Note that reference numeral 3
Reference numeral 2 denotes a towing wire from the towing ship 8, and a signal cable (not shown) is provided along the towing wire.

[0009] As shown in FIG.
Has a pair of magnetic sensors 34 on the lower surface of the fuselage for detecting the underwater cable 12 from both sides thereof, and requires an underwater camera 36 for monitoring the buried machine 14 and the underwater cable underwater at the tip of the fuselage. Provided at the rear end of the vehicle to measure the attitude, altitude, and azimuth information of the aircraft. In the underwater ROV 16, a plurality of thrusters 38 that generate a propulsion force with a screw or the like and can direct the propulsion force in an arbitrary direction are provided at four corners of the fuselage in plan view, and various data signals and control are performed between the underwater ROV 16 and the towing ship 8. And a signal transmission device 40 (transmission wire 40a) for transmitting and receiving signals (for the ROV, see, for example, R & D News kansai 1998.9 371).

In the embodiment, as shown in FIG. 1A, a buried machine 12 capable of remotely controlling the operation of a submarine cable 12 that has been settled on the bottom of the water according to a predetermined laying route from a towing vessel 8 is provided. When the underwater ROV 16 is mounted on the underwater cable and mounted on the underwater camera, the underwater ROV 16 is mounted separately from the underground machine 14 and can move in the water in any direction. And underwater ROV1
6 is located around the underwater cable 12. At this time,
The captured image of the underwater camera 36 and the detection result of the magnetic sensor 34 are transmitted to the towing boat 8, and the transmitted captured image and the detection result are monitored on the towing boat 8 to monitor the position and the position of the underwater cable 10. Check the situation.

Then, as shown in FIG. 1 (b), the burying machine 14 is lowered into the water from above the towing ship 8, and the underwater RO
While monitoring camera images from V16,
By issuing an operation command to the buried machine 14 from the ship,
The burying machine 14 is guided toward the underwater cable 12.

As shown in FIG. 2A, the work of attaching the burying machine 14 guided to the underwater cable 12 to the underwater cable 12 is also performed while monitoring the image captured by the camera from the underwater ROV 16 from the towing ship 8. , By operating the burying machine 14 by issuing an operation command.

After the work of mounting the burying machine 14 on the underwater cable 12 as described above, as shown in FIG. The underwater ROV 16 can be monitored and confirmed over the entire periphery of the burying machine 14.

According to the embodiment, when the underwater cable 12 attached to the water bottom 10 is buried by the burying machine 14, the photographed image of the underwater camera 36 and the detection result of the magnetic sensor 34 are used for towing a ship on the water. The transmitted image and the detection result are monitored on the ship to confirm the position and condition of the underwater cable 12. And underwater ROV
By issuing an operation command to the buried machine 14 from the ship while monitoring the camera image from the camera 16, the buried machine 14 is guided toward the underwater cable 12, and the underwater cable 12 is attached to the buried machine 14. Operate. Therefore, it is possible to accurately monitor the underwater cable 12 and the burying machine 14 without the need for the diver to perform a diving operation, and to guide the burying machine 14 to the underwater cable 12 according to the monitoring information to perform the mounting work. Therefore, the monitoring and guidance work by the diver is not required, and the work efficiency is remarkably improved, and a significant cost reduction can be achieved.

The present invention is not limited to the above embodiment, but can be variously modified.

[0016]

As described above, according to the present invention, since the burying machine is moved along the underwater cable and the burying is guided to a predetermined route, the underwater cable can be connected to the underwater cable without the need for diving work by a diver. The burial machine can be accurately monitored, and the burying operation can be performed according to the monitoring information. Therefore, the monitoring and guidance work by the diver is not required, and the work efficiency can be remarkably improved, and a significant cost reduction can be achieved. In addition, since divers do not need to do this work, they can respond quickly even in deep water, resulting in significant cost reduction. In addition, an existing burying machine can be used without manufacturing an expensive burying machine in which the function of the underwater monitoring mobile unit is integrated with the burying machine, thereby reducing costs. Also, because existing burial machines can be diverted,
This also saves cost because the surface ship for controlling the buried machine can be handled by a small ship.

[Brief description of the drawings]

FIGS. 1A and 1B are explanatory diagrams of a method of guiding and mounting a burying machine on a submarine cable according to an embodiment of the present invention.

FIGS. 2 (c) and 2 (d) are explanatory diagrams of the method of guiding and attaching the burying machine to the underwater cable, following FIG.

FIGS. 3 (a) and 3 (b) are a front view and a plan view illustrating an embedded machine.

FIGS. 4A and 4B are a front view and a plan view illustrating an underwater monitoring ROV.

FIG. 5 is an explanatory diagram of a conventional diver's burial machine guiding operation.

[Explanation of symbols]

 Reference Signs List 10 underwater 12 underwater cable 14 buried machine 16 towing ship 18 underwater monitoring ROV 20 guidance control device 28 signal transmission equipment 26,38 thruster 30,36 underwater television camera 34 magnetic sensor

Claims (2)

[Claims] 1. An underwater camera when a submersible cable that has been settled on the bottom of the water according to a predetermined laying route is back-buried by a burying machine that can be propelled in any direction in the water and whose operation can be remotely controlled from a ship. By moving the underwater monitoring mobile body equipped with a cable detector and being able to move in the water in any direction separately from the buried machine, advance the underwater monitoring mobile body to the underwater monitoring cable. And transmit the captured image of the underwater camera and the detection result of the detector to the surface ship, monitor the transmitted captured image and the detection result on the ship, and confirm the position and status of the underwater cable By issuing an operation command to the buried machine from the ship while monitoring the camera image from the underwater monitoring mobile unit, the buried machine is guided toward the underwater cable and sent to the buried machine. Induction and mounting method of embedding machine to underwater cable, characterized by operating the water bottom cable mounting work. 2. After the burying machine is mounted on the underwater cable, the state of the buried machine's landing and the mounting on the underwater cable are monitored over the entire periphery of the buried machine by the underwater monitoring moving body. 2. The method of guiding and mounting a buried machine to a submarine cable according to claim 1, wherein the method is performed by monitoring and confirming.