RU2423766C1 - Method to repair underwater cable communication line - Google Patents

Abstract

FIELD: electricity. ^ SUBSTANCE: technological process is stated with application of a self-propelled manned submersible (S) with higher manoeuvring properties in depth and in the horizontal plane, also when moving at low speed, and also when stopped, with a mode of dynamic positioning in the specified point. S has compartments with required facilities to carry out a full complex of works to eliminate damages on underwater communication cable lines (UCCL) under normal atmospheric conditions. ^ EFFECT: provision of underwater communication cable lines repair under any weather conditions, in any time of the year and at full depth. ^ 12 dwg

Description

The invention relates to the field of electrical engineering, in particular to the technique of underwater cable communication, and can be used in the repair of underwater cable communication lines (PCLS) of various types.

A known method of repair of an underwater cable. Katanovich A.A., trouble S.I. Underwater cable communication systems. St. Petersburg, Shipbuilding, 2009, pp. 134-136 [1].

According to this method, cable repairs are carried out using a surface cable vessel (CS). To do this, the KS using special equipment sprays the first tattered end of the cable and installs it on the buoy. Then they feed the other end of the cable, lift it on board the COP. At the COP, a repair cable on board is attached to it and laid in the direction of the buoy installed on the first end of the cable. Then they grab the buoy with the cable, lift it on board the COP, remove the part of the jammed cable, into which water passed under pressure at depth, connect it to a new repair cable, lay the insert cable, lift the second broken cable end from the bottom, splicing the ends of the cables and then lower the loop of the spliced cable to the bottom.

The disadvantages of the analogue are:

- the timeliness of the repair of PCLS in the case of prolonged stormy weather, when the surface CS cannot work, is not ensured;

- when making the connection of the submarine cable, the secrecy necessary in the case when repairing submarines not declared to mariners is repaired is not provided;

- Vulnerability of the COP at the repair site when pirates attacked it.

The prototype of the claimed method is "Method for repair of an underwater cable" described in Japan patent No. 49-40426, class. H02g 1/14. According to this method, an underwater vehicle is lowered to the bottom, which is a platform consisting of a waterproof hemisphere and an auxiliary container mounted on it, which serves to accommodate workers. The container is lowered on a cable from a surface vessel to the seabed, where the damaged cable is located. To remove sea water from the hemisphere, compressed air is introduced into it and its pressure is maintained at a level close to atmospheric. From the auxiliary container, the working specialists descend to the seabed, penetrate the drained hemisphere, pull the cable loop with damage there, repair it, lower it and lay it on the bottom, then go back to the container, after which the platform and the hemisphere are lifted aboard the vessel.

The disadvantages of this method include:

- connection and repair of the underwater cable can be made only at shallow depths, at which a person can work without special diving equipment;

- high consumption of repair cable;

- low productivity of work performed, etc.

The aim of the present invention is to provide repair of the underwater cable at great depths at any time of the year and to reduce the consumption of repair cables.

This goal is achieved in that the cable is repaired underwater using a self-propelled underwater vehicle, which approaches the place of cable damage, lowers an underwater robot that grabs the cable at the site of damage, cuts it, seals the ends with the help of lugs that contain a special quick-acting sealing composition, and sets the first end of the cable onto the buoy, then pulls the second end of the cable through the hatch into the underwater vehicle, selects the damaged cable section, then Seals the end of the cable after sampling the damaged section and sets it on the buoy, after which the underwater vehicle goes to the first end of the cable, then the robot is lowered to the first end of the cable on the buoy to pull it into the underwater vehicle, after which the robot releases the cable from the buoy and feeds it through the hatch inside the underwater vehicle to select the second damaged part of the cable, while the second damaged part of the cable is selected, removed and spliced with the insert cable, then start the insert is laid to the end of the cable on the buoy, the underwater vehicle approaches the buoy with the end of the cable, lowers the underwater robot to take the cable from the buoy from the seabed to feed it into the underwater vehicle through the hatch, then the end of the cable is freed from the buoy and fed into the underwater vehicle for splicing, then the splice cable sleeve lowers to the seabed, the operation of connecting the ends of the cables is completed.

In the technology of underwater work, including underwater cable, robots are widely used, controlled from the side of the carrier by cable. There are many modifications of such robots, which differ in size, depth of use and special technical devices. In repair underwater cable works, varieties are used that have two manipulators and have increased maneuverability [1].

In the drawing, as an illustration, the repair process of the PCLS, the list of operations and the technological sequence of their implementation when repairing damage is shown.

Damage repair during the repair of the underwater cable line is carried out as follows:

1) the underwater vehicle approaches the place of damage to the PCLS;

2) lowers the underwater robot to the place of damage;

3) captures the cable in the place of damage by the robot;

4) cutting the cable, sealing the ends and placing one first end on the buoy, and pulling the second end through the hatch into the underwater vehicle;

5) the selection of the damaged cable;

6) then seal the ends of the cable after sampling the damaged area, placing it on the buoy and leaving the underwater vehicle to the buoy with the first end of the cable;

7) lower the robot to the first end of the cable on the buoy to drag it into the underwater vehicle;

8) they destroy the end of the cable, free it from the buoy, feed it through the hatch into the underwater vehicle, make measurements, select the second damaged part of the cable;

9) the second damaged part of the cable is selected, splicing with the insert cable is performed, and the insert is laid to the end of the cable on the buoy;

10) approach the buoy with the end of the cable, lower the robot to take the cable with the buoy from the seabed to feed it into the underwater vehicle through the hatch;

11) serves the end of the cable with the buoy in the underwater vehicle to perform splicing;

12) splicing the cable, the splice clutch lowers to the seabed, the cable connection operation is completed.

The economic efficiency from the implementation of this method is as follows:

- in case of damage to the undersea cable communication lines during the seasons of the stormy sea and ice conditions, their downtime will be significantly reduced;

- saves repair cable;

- PCLS repair is provided at any time of the year and at great depths.

Claims (1)

A method of repairing an underwater cable communication line based on the use of a self-propelled underwater vehicle and the developed technology, characterized in that the cable is repaired underwater using a self-propelled underwater vehicle that approaches the site of cable damage, lowers an underwater robot that grabs the cable at the site of damage, cuts it seals the ends and sets the first end of the cable onto the buoy, then pulls the second end of the cable through the hatch into the underwater vehicle, selects the damaged part of the cable eating, then seals the end of the cable after sampling the damaged area and placing it on the buoy, after which the underwater vehicle leaves for the first end of the cable, the robot is lowered to the first end of the cable on the buoy to pull it into the underwater vehicle, and the robot releases the cable from the buoy and feeding it through the hatch into the underwater vehicle to select the second damaged part of the cable, while the second damaged part of the cable is selected, removed and spliced with the insertion cable, insert at the end of the cable on the buoy, and the underwater vehicle approaches the buoy with the end of the cable, lowers the underwater robot to take the cable from the buoy from the seabed to feed it into the underwater vehicle through the hatch, then the end of the cable is freed from the buoy, fed into the underwater vehicle for splicing, after splicing the cable, the splice clutch sinks to the seabed, the operation of connecting the ends of the cables is completed.