Floating assisting device and floating assisting device for submarine cable laying and landing

Abstract

The utility model discloses a floating-assisting device and a floating-assisting device for laying and landing submarine cables, which comprise a buoy with a hollow inner cavity, at least one connecting ring is respectively and correspondingly fixed at two ends of the buoy, and a buoy connecting device is detachably arranged on the connecting ring. At least one submarine cable surrounding device used for being matched with a submarine cable is fixed to the bottom end of the buoy. When a submarine cable is laid and lands, the submarine cable is pulled ashore through the cooperation of the winch and the traction rope, in the process, the submarine cable is pulled out of a cable laying ship, all the floating assisting devices for laying and landing of the submarine cable are sequentially assembled on the submarine cable, and the submarine cable is suspended in seawater by means of buoyancy generated by all the buoys. According to the submarine cable laying device, the submarine cable is prevented from sinking due to self gravity and generating friction with the seabed, so that the phenomenon that external insulation of the submarine cable is scratched by sharp objects such as seabed rocks is avoided, protection is formed for laying and landing of the submarine cable, and the laying efficiency can be improved by utilizing matched traction laying of the winch and the traction rope.

Description

Technical Field

[0001] The utility model relates to the technical field of cable laying in offshore wind power projects, in particular to a floating aid for landing and laying submarine cables, and also to a floating aid device utilizing the floating aid. Background Art

[0002] Cable laying in offshore wind power projects is mostly carried out with the help of special cable laying vessels, but special cable laying vessels are large in size and the water depth during operation will limit their travel position. For example, the water depth in the landing section of the submarine cable is small, and the special cable laying vessel cannot enter the area to carry out operations. At present, the main methods for laying submarine cables in the landing section are:

[0003] 1. Wait for the high tide period to allow the dedicated cable-laying vessel to continue laying the cable to the shore, or replace the cable-laying vessel with a relatively shallow draft to land and lay the submarine cable in offshore waters. This method not only increases the construction cost, but is also restricted by on-site conditions such as high tide time, resulting in reduced submarine cable laying efficiency.

[0004] Second, according to the path in the offshore wind power project design drawings, the special cable-laying ship is anchored near the landing area, the end of the submarine cable is connected to the boat, and the submarine cable is pulled to the shore of the landing point with the help of the boat, and then dragged ashore by personnel to achieve the landing of the submarine cable. In this laying method, the submarine cable sinks due to its own weight and rubs against the seabed, which can easily cause the outer insulation of the submarine cable to be scratched by sharp objects such as seabed rocks, thereby causing unnecessary losses. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a submarine cable laying and landing buoyancy aid which can prevent the outer insulation of the submarine cable from being scratched, is less restricted by on-site conditions, and helps to improve the landing efficiency of the submarine cable.

[0006] In order to solve the above technical problems, the technical solution of the utility model is: a floating aid for submarine cable laying and landing, including a buoy with a hollow inner cavity, at least one connecting ring is fixed to each of the two ends of the buoy, and a buoy connecting device is detachably provided on the connecting ring, and at least one submarine cable embracing device for cooperating with a submarine cable is fixed to the bottom end of the buoy.

[0007] As a preferred technical solution, the submarine cable embracing device includes a semi-annular fixed arm fixed at the bottom end of the buoy, one end of the fixed arm is rotatably equipped with a semi-annular movable embracing ring, the other end of the fixed arm is detachably docked with the movable embracing ring, and an embracing hole is formed after the fixed arm and the movable embracing ring are assembled, and the submarine cable is arranged to pass through the embracing hole.

[0008] As a preferred technical solution, the two butting ends of the fixed arm and the movable ring are respectively provided with protruding arm connecting parts, and the sum of the thicknesses of the two arm connecting parts at the same end is less than or equal to the thickness of the fixed arm or the movable ring.

[0009] As a preferred technical solution, the buoy connection device is configured as a ring chain or a rope.

[0010] As a preferred technical solution, the buoy is configured as a cylindrical plastic cylinder, and three connecting rings are respectively provided at both ends of the buoy, and the three connecting rings are arranged in a triangle at the end of the buoy.

[0011] As an improvement to the above technical solution, a handle is fixedly provided on the buoy to facilitate assembly operations.

[0012] The utility model also provides a buoyancy aid for submarine cable laying and landing, which is used in conjunction with a cable-laying vessel to achieve safe laying and landing of the submarine cable, including a winch arranged on the shore of the submarine cable landing point, the winch drives a pulling rope, the end of the pulling rope is detachably connected to the submarine cable, the submarine cable between the pulling rope and the cable-laying vessel is provided with the buoyancy aid for submarine cable laying and landing, the two adjacent buoys are connected in cooperation with the connecting ring and the buoy connecting device, and the submarine cable is connected to the pulling rope after passing through each of the submarine cable embracing devices.

[0013] Due to the adoption of the above technical scheme, the utility model has the following beneficial effects: when the submarine cable is laid and landed, it is pulled ashore by the cooperation of a winch and a pulling rope. In this process, as the submarine cable is pulled out from the cable-laying ship, each submarine cable laying and landing buoyancy aid is successively assembled on the submarine cable, and the buoyancy generated by each buoy is used to suspend the submarine cable in the seawater to prevent it from sinking due to its own gravity and rubbing against the seabed, thereby avoiding the phenomenon that the outer insulation of the submarine cable is scratched by sharp objects such as seabed rocks, thus protecting the laying and landing of the submarine cable, and using the cooperation of a winch and a pulling rope to pull and lay the cable helps to improve the laying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The following drawings are only intended to illustrate and explain the present invention, and do not limit the scope of the present invention.

[0015] Figure 1 This is a schematic diagram of the structure of a floating aid for laying and landing a submarine cable according to an embodiment of the utility model;

[0016] Figure 2 This is a side view of a floating aid for laying and landing a submarine cable according to an embodiment of the utility model;

[0017] Figure 3 This is a simplified structural diagram of a buoyancy aid device for laying and landing a submarine cable according to an embodiment of the utility model;

[0018] Figure 4 It is a schematic diagram of the connection state of two submarine cable laying and landing floating aids in the submarine cable laying and landing floating aid device of the embodiment of the utility model;

[0019] In the figure: 1-buoy; 2-handle; 3-submarine cable; 4-connecting ring; 5-fixed arm; 6-movable arm; 7-encircling hole; 8-arm connecting part; 9-cable laying boat; 10-windlass; 11-pulling rope. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with the accompanying drawings and examples. In the following detailed description, only certain exemplary embodiments of the present invention are described by way of illustration. Needless to say, those skilled in the art will recognize that the described embodiments may be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the drawings and descriptions are illustrative in nature and are not intended to limit the scope of protection of the claims.

[0021] like Figure 1 and Figure 2 As shown, the floating aid for laying and landing a submarine cable comprises a buoy 1 with a hollow inner cavity, wherein the buoy 1 is an injection-molded cylindrical plastic cylinder, which is light, easy to move and has a large buoyancy. A handle 2 for facilitating assembly operation can also be fixed on the buoy 1 to facilitate moving the buoy 1 so as to quickly complete its assembly and disassembly on the submarine cable 3.

[0022] At least one connecting ring 4 is fixed to each end of the buoy 1, and a buoy connecting device is detachably provided on the connecting ring 4. When in use, the buoy connecting device cooperates with the connecting ring 4 to connect the adjacent buoys 1 together to withstand the impact caused by the waves. Specifically, three connecting rings 4 are provided at each end of the buoy 1, and the three connecting rings 4 are arranged in a triangular shape at the end of the buoy 1, so that the connection between the adjacent buoys 1 is stable. When the buoy 1 is impacted by the waves, the position change of the two adjacent buoys 1 is small, so that the submarine cable 3 can maintain good stability. The buoy connecting device is set as a ring chain or a rope. When the ring chain is selected, the two ring chains at both ends are provided with openings that can be opened and closed, so that it can be quickly disassembled and assembled with the connecting ring 4; when the rope is selected, a hook that can be sealed can be connected to each end of the rope, so that it can also be quickly disassembled and assembled with the connecting ring 4.

[0023] At least one submarine cable embracing device for cooperating with the submarine cable 3 is fixed at the bottom end of the buoy 1, which is used to be mounted on the submarine cable 3 to achieve a buoyant effect on the submarine cable 3 with the help of the buoy 1, so that the submarine cable 3 is always suspended in the seawater during the laying and landing process, avoiding it from sinking due to its own weight and rubbing against the seabed, thereby avoiding the phenomenon that the outer insulation of the submarine cable is scratched by sharp objects such as seabed rocks, so as to protect the laying and landing of the submarine cable.

[0024] Specifically, the submarine cable embracing device includes a semi-circular fixed arm 5 fixed at the bottom end of the buoy 1, one end of the fixed arm 5 is rotatably equipped with a semi-circular movable embracing ring 6, the other end of the fixed arm 5 is detachably docked with the movable embracing ring 6, and the fixed arm 5 and the movable embracing ring 6 are assembled to form an embracing hole 7, and the submarine cable 3 is arranged through the embracing hole 7. The rotating matching ends of the fixed arm 5 and the movable embracing ring 6 are assembled through a pin or a rotating shaft, and the detachable docking ends of the fixed arm 5 and the movable embracing ring 6 can be realized by the bolts and nuts used in conjunction, and of course, the cotter pins can also be used, which are convenient, simple and quick to operate. When in use, the submarine cable 3 is set in the embracing hole 7, and the fixed arm 5 and the movable embracing ring 6 are docked by the combination of bolts and nuts to realize the assembly of the entire buoyancy aid on the submarine cable 3.

[0025] In this embodiment, a protruding arm connection part 8 is respectively provided at the two butting ends of the fixed arm 5 and the movable ring 6, and the sum of the thickness of the two arm connection parts 8 at the same end is less than or equal to the thickness of the fixed arm 5 or the movable ring 6. After the fixed arm 5 and the movable ring 6 are butted together, the whole is formed into a ring shape, which is sleeved on the outside of the submarine cable 3. The above design of the arm connection part 8 is to form a regular ring structure to prevent the appearance of edges and corners from scratching the skin of the submarine cable 3 under the impact of waves.

[0026] like Figure 3 and Figure 4As shown, this embodiment also provides a buoyancy aid for laying and landing of a submarine cable, which is used in conjunction with a cable-laying ship 9 to achieve safe laying and landing of a submarine cable 3, including a winch 10 arranged on the shore of the landing point of the submarine cable 3, the winch 10 drives a pulling rope 11, the end of the pulling rope 11 is detachably connected to the submarine cable 3, the submarine cable 3 between the pulling rope 11 and the cable-laying ship 9 is provided with the buoyancy aid for laying and landing of the submarine cable, and the two adjacent buoys 1 are connected and arranged under the cooperation of the connecting ring 4 and the buoy connecting device, and the submarine cable 3 passes through each of the submarine cable embracing devices and is connected to the pulling rope 11. The cooperation of the winch 10 and the pulling rope 11 is used to lay and land the submarine cable 3, and during the landing process of the submarine cable 3, each of the buoyancy aids for laying and landing of the submarine cable cooperates to suspend the submarine cable 3 in the seawater to prevent it from sinking and touching the bottom.

[0027] The operation process of the submarine cable laying and landing buoyancy aid device is as follows:

[0028] The first step is to use a small boat, a speedboat, a motorboat or other tools to pull the pulling rope 11 to the cable laying vessel 9.

[0029] The second step is to firmly connect the pulling rope 11 to the submarine cable 3.

[0030] The third step is to start the winch 10, control its rotation speed, and slowly pull the submarine cable 3.

[0031] Step 4: During the process of pulling the submarine cable 3 , the floating aids for laying and landing the submarine cables are successively assembled onto the submarine cable 3 .

[0032] Step 5: The submarine cable 3 is pulled onto the ground by the winch 10 and the pulling rope 11, and the floating aids for laying and landing the submarine cables are removed from the submarine cable 3 one by one.

[0033] This embodiment can effectively prevent the outer insulation of the submarine cable from being scratched by utilizing the submarine cable laying and landing floating aid. The use of the submarine cable laying and landing floating aid is less restricted by site conditions and is helpful to improve the submarine cable landing efficiency.

[0034] The description of the present invention is given for the purpose of illustration and description, and is not intended to be exhaustive or to limit the present invention to the disclosed form. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and design various embodiments with various modifications suitable for specific uses.

Claims

1. A floating aid for laying and landing a submarine cable, comprising a buoy with a hollow inner cavity, characterized in that: At least one connecting ring is fixed to both ends of the buoy, and a buoy connecting device is detachably provided on the connecting ring. At least one submarine cable embracing device for cooperating with a submarine cable is fixed to the bottom end of the buoy.

2. The floating aid for laying and landing a submarine cable according to claim 1, characterized in that: The submarine cable embracing device includes a semi-annular fixed arm fixedly arranged at the bottom end of the buoy, one end of the fixed arm is rotatably equipped with a semi-annular movable embracing ring, the other end of the fixed arm is detachably docked with the movable embracing ring, and an embracing hole is formed after the fixed arm and the movable embracing ring are assembled, and the submarine cable is arranged to pass through the embracing hole.

3. The floating aid for laying and landing submarine cable according to claim 2, characterized in that: The two butting ends of the fixed arm and the movable embrace ring are respectively provided with protruding arm connecting parts, and the sum of the thicknesses of the two arm connecting parts at the same end is less than or equal to the thickness of the fixed arm or the movable embrace ring.

4. The floating aid for laying and landing a submarine cable according to claim 1, characterized in that: The buoy connection device is configured as a ring chain or a rope.

5. The floating aid for laying and landing submarine cable according to claim 1, characterized in that: The buoy is configured as a cylindrical plastic cylinder, and three connecting rings are respectively provided at two ends of the buoy, and the three connecting rings are arranged in a triangle at the end of the buoy.

6. The floating aid for laying and landing a submarine cable according to claim 1, characterized in that: A handle is fixedly provided on the buoy for facilitating assembly operation.

7. A floating device for laying and landing submarine cables, used in conjunction with a cable-laying vessel to achieve safe laying and landing of submarine cables, characterized in that: It includes a winch arranged on the shore of the submarine cable landing point, the winch drives a pulling rope, the end of the pulling rope is detachably connected to the submarine cable, the submarine cable between the pulling rope and the cable-laying vessel is provided with a submarine cable laying and landing buoy according to any one of claims 1 to 6, two adjacent buoys are connected in cooperation with the connecting ring and the buoy connecting device, and the submarine cable is connected to the pulling rope after passing through each of the submarine cable embracing devices.

Images