RU220479U1 - TOWED SUBMARINE CABLE DEEPTER - Google Patents

Abstract

The utility model relates to shipbuilding, namely towed submarine cable burying devices, and can be used to immerse a submarine cable into the seabed. The towed submarine cable burying device contains a supporting frame, two support skids with traction-lifting eyes, a guide funnel, an attachment frame, a centrifugal pump with a pressure hose, a hydraulic cylinder, a hydraulic station, a scourer with nozzles, a network switch-splitter, a control controller, a cable-rope stand , an underwater distribution block, and also contains a telemetry frame with cameras and spotlights, an attachment frame, a navigation unit, while the scourer contains guide slips, the guide funnel and scourer contain hinged covers with hinged locks, the hydraulic cylinder contains a position sensor. The technical result is to improve the performance characteristics of a towed submarine cable burying device.

Description

The utility model relates to shipbuilding, namely to towed submarine cable burying devices and can be used to immerse a submarine cable into the seabed.

A known device is CN203242968U (10/16/2013) for deep laying of a submarine cable, equipped with a frame assembly, a mechanical plow body, a hydromechanical digging plow body and sliding shoes, with the mechanical plow body located at the front end of the frame assembly; the body of the hydromechanical earthmoving plow is located at the rear end of the frame; four sliding shoes are respectively located at the four end corners of the frame assembly. The body of a mechanical plow and the body of a hydromechanical earth-moving plow are respectively equipped with hydraulic drive devices. This device provides the ability to adjust the laying depth, the requirements for digging trenches for various soil structures can be met. The efficiency of digging trenches at deep depths has also been increased, and the installation period has been reduced.

The disadvantage of this technical solution is the presence of a mechanical plow and plow, that is, obtaining a trench mechanically.

The invention RU2175617C1 (11/10/2001) is known, relating to floating complexes of technical means for laying a submarine cable buried in the ground. The cable-laying complex includes a supporting pontoon with electrical equipment, a hydraulic pump unit, and a block of hydraulic distributors. The supporting pontoon with the equipment is connected via hydraulic hoses, floats and a coupling cable to an underwater deepener, which includes a pair of support skis on which the supporting frame with the trencher drive is attached. In the front part of the supporting frame there is a block of hydraulic distributors connected to hydraulic cylinders for raising and lowering the trencher, made in the form of a caterpillar chain. A device for hydrocleaning of the chain is located in the lower part of the supporting frame. A drum with a cable is installed in the front part of the support skis behind the hydraulic distributor. The underwater deepener is connected via a cable to a traction device installed on the shore.

The disadvantage of this technical solution is the presence of a caterpillar chain, that is, obtaining a trench mechanically.

The closest to the claimed technical solution is a device (CN208623242U, 03/19/2019) for laying a large-diameter submarine cable, including laying the main part, a laying control system and a laying control system, a laying control system in the main part. The paving control system is used to monitor the operating status of the main part, as well as the electrical connection and setting, including the skids, support body and plow. The body is mounted on runners, the tail part of the articulated plow body is mounted on the support body. Mounted on the plow body is a control system that articulates two sets of plow body doors that open and close. The plow body forms a cable chamber at the bottom.

The disadvantage of this technical solution is the absence of a unit for determining position in space and determining motion parameters.

The problem to be solved by the claimed utility model is the development of a towed deepening device that operates effectively at great depths.

This problem is solved due to the fact that the towed submarine cable burying device contains a supporting frame, two support skis with traction and lifting eyes, a guide funnel, an attachment frame, a centrifugal pump with a pressure hose, a hydraulic cylinder, a hydraulic station, a scourer with nozzles, a network switch-splitter, a control controller, a cable-rope stand, an underwater distribution block, and also contains a telemetry frame with cameras and spotlights, an attachment frame, a navigation unit, while the scourer contains guide slips, the guide funnel and the scourer contain hinged covers with hinged locks, the hydraulic cylinder contains a sensor provisions.

The technical result is to improve the performance characteristics of a towed submarine cable burying device.

The towed submarine cable burying device is designed for laying cables using the hydraulic erosion method and can be used to immerse a submarine cable into the seabed with relatively low shear stiffness (up to 100 kPa).

The essence of the utility model is illustrated by drawings:

Fig. 1 – general view of the device;

Fig. 2 – scourer block.

The figures indicate: 1 – guide funnel; 2 – pressure hose; 3 – pump; 4 – supporting frame; 5 – hydraulic cylinder; 6 – support ski; 7 – telemetry frame; 8 – hydraulic station; 9 – scourer; 10 – folding lock; 11 – navigation block; 12 – network switch-splitter; 13 – control controller; 14 – lifting eye; 15 – attachment frame; 16 – cable-rope stand; 17 – underwater distribution block; 18 – hinged cover; 19 – guide slips; 20 – scourer loop 9; 21 – sliding bushing; 22 – nozzle; 23 – funnel telemetry frame.

The towed submarine cable burying device contains a supporting frame 4, two support skids 6, a guide funnel 1, an attachment frame 15, a centrifugal pump 3 with a pressure hose 2, a hydraulic cylinder 5 with a position sensor (not indicated in the drawings), a hydraulic station 8, a scourer 9, a block navigation 11, network switch-splitter 12, control controller 13, cable-rope rack 16, underwater distribution block 17.

The supporting frame 4 is a spatial metal structure made of steel pipes of the same diameter, connecting two support skis 6. Both ends of the support skis 6 are curved upward for better sliding along the bottom of the reservoir. The support skis 6 at both ends contain traction and lifting eyes 14 for lowering the device to the bottom and lifting it from it, as well as towing the product during operation.

On one of the support skis 6, on the support posts, a centrifugal pump 3 is mounted using clamps, connected by means of a pressure hose 2 to a scourer 9, in which nozzles 22 are installed. Pump 3 takes water from the external environment, creating a powerful flow of the required volume. The water flow enters through hose 2 into the washer 9, where it is sprayed using nozzles 22.

A movable scourer 9, a guide funnel 1 and a hydraulic cylinder 5 for controlling its position with a position sensor are mounted on the supporting frame 4 in the middle part of the deepener. The hydraulic cylinder 5 is fixed to the middle part of the frame using an axle and lugs welded to the frame 4. The other end of the hydraulic cylinder 5 is also fixed through the axis to the lugs located on the scourer hinge 9, which allows the scourer block to swing on the sleeve 21 by 36 degrees. The linear type position sensor is located parallel to the line of action of the hydraulic cylinder 5 and is mounted on movable axes. The position sensor allows you to understand the position of the scourer block relative to the frame 4 of the device. The guide funnel 1 is attached to the top of the scourer 9 and contains a hinged cover 18, to which a telemetry frame 23 with a camera and a spotlight is attached. Inside the scourer housing 9, guide slips 19 with a hinged cover 18 and nozzles 22 are mounted. The nozzle 22 is a rotating body with an external thread for fixation in the scourer body 9 and a hydraulic channel with a conical expansion at the end for proper spraying of the water flow. The hinged covers 18 are attached using hinges, and their fixation occurs using hinged locks 10. The hinged lock 10 consists of movable plates that serve to correctly locate the lock 10 on the body of the funnel 1 and the scourer 9. Using a hinged bolt, the covers 18 are pressed against the scourer body 9 and funnel 1. The design of the hinged covers 18 allows you to place the cable, which must be buried, in the internal space of the funnel 1 and the scourer 9. The slips 19 act as guides for the correct placement of the buried cable inside the scourer 9.

On another support skid 6 there is mounted an attachment frame 15, which is a spatial structure made of profile steel pipes, designed for rational installation in its internal space of equipment and units: hydraulic station 8, navigation unit 11, network switch-splitter 12, control controller 13 , cable-rope stands 16, underwater distributor 17, as well as to protect them from possible mechanical damage. The navigation unit 11, network switch 12, controller 13 and distributor 17 are mounted on the frame of the attachment 15 using special clamps that follow the shape of the cylindrical body of the blocks, which completely eliminates possible movements of the blocks in all directions. The hydraulic station 8 is mounted on the frame 15 using fasteners connecting the plates located on its body with the plates on the frame of the attachment 15. The cable-rope stand 16 is fixed to this ski 6 using a flange connection, one of which is welded on the upper surface of the ski 6, and the second is part of the housing of the rack 16. At the end of the rack of the cable cable 16 there is an angular position sensor for the power seal of the cable cable (not indicated in the drawings). Also attached to the attachment frame 15 is a telemetry frame 7 with a camera and a spotlight.

The device works as follows.

When carrying out work to bury a cable laid from a watercraft, a towed burying device is installed on the deck on support skis 6. The hinged covers 18 located on the scourer 9 and the guide funnel 1 are opened and the cable to be buried is inserted into the resulting space of the guide slip 19. The hinged covers 18 are closed and secured using hinged locks 10. Using crane equipment located on the craft, the deepener is lowered to the bottom of the reservoir along with the cable, which is located in the space of the guide slip 19. Next, the hydraulic scour is turned on and the scourer 9 is lowered. Control is carried out visually using telemetry cameras and position sensors of the scourer 9. After lowering the scourer 9 to the required angle, the craft can begin to move. The towed deepener begins to move behind the watercraft, repeating its trajectory, a trench is formed (eroded), passing the cable “through itself”, the deepener lays it at the bottom of the trench.

Water for the operation of the hydraulic washout system is taken from the external environment using a high-performance pump 3 and supplied to nozzles 22, then a directed spray of the working fluid occurs, which leads to erosion of the soil.

The movement of the underwater deepener along the bottom of the reservoir is ensured only by its towing using the watercraft to which it is attached.

Electricity is supplied to the deepening device and all control and control signals are carried out through a cable cable.

Due to the fact that the centrifugal pump 3 with the pressure hose 2 is located directly on the frame 4 of the device, and not on the deck of the carrier vessel, there is no need to use special pressure hoses of great length and weight, and power supply and control of the pump 3 and, accordingly, the hydraulic scouring system occurs via cable -cable Also, the location of the centrifugal pump 3 on the frame 4 of the device makes it possible to reach working depths of 200 m, since there is no need to supply fluid to the hydraulic jetting unit from the deck of the carrier vessel through an expensive hose 2 designed for such depths.

Due to the position sensor on the hydraulic cylinder 5 of the scourer 9, the required cable laying depth is achieved.

Thanks to the hinged covers 18 with hinged locks 10 on the scourer 9, it is possible to start washing the cable from any point along the route.

The presence of the navigation unit 11 makes it possible to achieve a more accurate position of the cable on the seabed along the required trajectory, and also eliminates the possibility of damage to the cable (cable bending, running over the cable, etc.) during operation.

The presence of a telemetry frame 7 with cameras and spotlights increases the safety of work and eliminates the possibility of cable damage (cable bending, running over a cable, etc.) during work. The frame houses a video surveillance system with the ability to manually adjust it in any direction. There are also many points on the frame for attaching elements of the lighting system. The design of the lighting fixtures implies their easy adjustment in any direction.

Advantages of this device:

a powerful hydraulic scouring system, which is provided by a highly efficient pump with a capacity of up to 480 cubic meters per hour;

the presence of a block for determining position in space and determining movement parameters;

initial adjustment of the position determination unit before launching under water with clarification during the towing process;

the presence of monitoring of cable-rope parameters, which allows you to monitor sensor readings, from which you can draw a conclusion about the position of the cable-rope relative to frame 4, during the operating mode of the deepener and prevent its damage;

on-board equipment monitoring system, including electrical power, data exchange channel with the towing vessel.

Claims (1)

A towed submarine cable burying device containing a supporting frame, two support skis with traction-lifting eyes, a guide funnel, an attachment frame, a centrifugal pump with a pressure hose, a hydraulic cylinder, a hydraulic station, a scourer with nozzles, a network switch-splitter, a control controller, a cable rack cable, an underwater distribution block, characterized in that it contains a telemetry frame with cameras and spotlights, a navigation unit, while the scourer contains guide slips, the guide funnel and scourer contain hinged covers with hinged locks, the hydraulic cylinder contains a position sensor.