Submarine cable overhanging section motion detection device

Abstract

The utility model discloses a submarine cable overhanging section motion detection device. The submarine cable overhanging section motion detection device comprises a submarine cable guide connection pipe, a submarine cable protection assembly and a data output module. The submarine cable protection assembly includes a plurality of bend limiting units. And the bending limiting units sleeve the overhanging section of the submarine cable guide connecting pipe and are sequentially arranged along the axial direction of the protected submarine cable. And the data output module is used for receiving and storing the data collected by each acceleration sensor, packaging the data and transmitting the data to a shore command center. According to the utility model, the plurality of bending limiting units are arranged on the outer ring of the submarine cable, so that the bending motion amplitude generated when the submarine cable is subjected to ocean current is reduced, and the submarine cable is protected. And meanwhile, an acceleration sensor is arranged in the bending limiting unit, so that a worker can timely and conveniently identify abnormal movement behaviors possibly existing in the overhanging section of the submarine cable, and a scientific basis is provided for preventive maintenance.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of ocean engineering, specifically relates to a kind of sea cable overhang section movement detection device. BACKGROUND

[0002] In the prior art, in the construction and operation of offshore wind power energy system, as the key infrastructure connecting wind turbine generator unit and land grid, the stability and reliability of submarine cable are directly related to the power generation efficiency and operation safety of the entire wind farm. Among them, the submarine cable forms a curved overhang section at the junction of the end of the wind turbine generator unit and the seabed.

[0003] The overhang section of the submarine cable, as a particularly vulnerable link in the submarine cable system, is directly exposed to the complex and changeable marine environment, facing multiple challenges from current scouring, wave impact, tidal action and seabed geological changes. These natural factors not only may directly cause physical damage to the submarine cable, but also may indirectly exacerbate the bending stress of the submarine cable by affecting the soil structure around the submarine cable, thereby threatening its structural integrity and electrical performance. At the same time, scouring may cause the soil near the foundation to be washed away, resulting in an increase in the length of the overhang section (the submarine cable buried in the mud is washed out).

[0004] Due to the complexity of the seabed environment, it is difficult and costly to directly monitor the scouring of the submarine cable overhang section. Traditional seabed detection methods, such as diver exploration or remote operated vehicle (ROV) operation, can provide detailed on-site data, but are limited by operating conditions, cost efficiency and real-time performance, and are difficult to be widely applied as a conventional monitoring method. UTILITY MODEL CONTENT

[0005] In order to make up for the deficiencies of the prior art, the utility model provides a kind of sea cable overhang section movement detection device to solve the technical problems of difficult detection of sea cable overhang section state and high detection cost.

[0006] To achieve the above-mentioned purpose, the specific technical solutions of the utility model are as follows:

[0007] A kind of sea cable overhang section movement detection device, including sea cable guide pipe, sea cable protection assembly and data output module. Protected submarine cable is arranged in sea cable guide pipe, and bottom is stretched out from sea cable guide pipe port, and forms curved overhang section with seabed.

[0008] The sea cable protection assembly includes a plurality of bending restriction units. Each bending restriction unit is sleeved on the overhang section of the sea cable guide pipe, and is arranged in sequence along the axial direction of the protected submarine cable.

[0009] A plurality of acceleration sensors are provided between the bending restriction unit and the protected submarine cable, for detecting the maximum amplitude of the overhang section when it is impacted by the current.

[0010] The data output module is used for receiving, storing and transmitting the data collected by each acceleration sensor to the onshore command center.

[0011] Further, the sea cable guide pipe is divided into a guide part and an access part from top to bottom.

[0012] Further, the bending limiting unit comprises two limiting members fixed to each other.

[0013] Further, the limiting member is sequentially divided into a clamping part and a limiting part along the axial direction.

[0014] Further, the limiting member on which the acceleration sensor is mounted is provided with an arc-shaped embedding groove.

[0015] Further, the data output module comprises a signal transmitter.

[0016] Further, the data output module further comprises a tower barrel.

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] 1. The utility model discloses a plurality of bending limiting units are arranged on the outer ring of the sea cable, the bending movement amplitude of the sea cable when being subjected to the sea current is reduced, and the sea cable is protected.

[0019] 2. The utility model discloses that the distributed arrangement of a plurality of sensors is ensured, the accuracy and reliability of the motion data of the sea cable suspension section are ensured, single sensor misjudgment is avoided, and the monitoring stability is improved.

[0020] 3. The utility model discloses a recess is set up in the limiting piece of corresponding bending limiting unit, and the acceleration sensor can be installed on the limiting piece through the recess, which can realize quick dismounting of the acceleration sensor and effectively avoid the position deviation of the acceleration sensor when the limiting piece is sleeved on the protected submarine cable.

[0021] 4. The data output module in the utility model adopts data storage and timing packaging transmission mode, prolongs system endurance and reduces communication cost. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the whole structure schematic diagram of the utility model;

[0023] Figure 2 It is the relative position schematic diagram of the limiting piece in each bending limiting unit in the utility model;

[0024] Figure 3 It is the structure schematic diagram of the limiting piece in the utility model;

[0025] Figure 4 It is the structure schematic diagram of the data output module in the utility model.

[0026] The drawing denotes: 1, protected submarine cable; 2, submarine cable guide pipe; 2-1, guide portion; 2-2, access portion; 3, submarine cable protection assembly; 4, data output module; 4-1, signal transmitter; 4-2, tower tube; 5, limiting piece; 5-1, clamping portion; 5-2, limiting portion; 5-3, outer convex edge; 5-4, clamping groove; 6, acceleration sensor; 7, recess; 8, seabed; 9, pile foundation. DETAILED DESCRIPTION

[0027] In the description of the utility model, it is understood that the orientation or position relation indicated by the terms "one end", "the other end", "outer side", "upper", "inner side", "horizontal", "coaxial", "central", "end", "length", "outer end" is based on the orientation or position relation shown in the drawing, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, so it can not be understood as the limitation of the utility model.

[0028] The utility model will be further described in connection with the drawings.

[0029] As Figure 1 And 2As shown, a kind of submarine cable suspension section movement detection device is used to monitor the motion state of the submarine cable hung on the pile foundation 9 erected in the ocean, to avoid the damage of submarine cable.The specific structure of the device includes submarine cable guide pipe 2, submarine cable protection assembly 3 and data output module 4.The protected submarine cable 1 is arranged in the submarine cable guide pipe 2, and guided to the seabed 8 through the submarine cable guide pipe 2.The protected submarine cable 1 is connected with the seabed 8 to form a curved suspension section.The submarine cable protection assembly 3 is sleeved on the suspension section of the protected submarine cable 1, which can protect the suspension section when the submarine cable is impacted by sea current.The submarine cable protection assembly 3 and the protected submarine cable 1 are provided with a plurality of acceleration sensors 6 arranged along the axial direction, which can detect the maximum amplitude of the suspension section when it is impacted by sea current.The data output module 4 is used to receive, store the data collected by each acceleration sensor 6, and transmit the data to the shore command center at regular intervals.

[0030] As shown in Figure 1 , the submarine cable guide pipe 2 is divided into guide part 2-1 and access part 2-2 from top to bottom.The access part 2-2 is a horn structure with large outer diameter and small inner diameter.The guide part 2-1 is an empty pipe structure connected with the horn of the access part 2-2.During use, the protected submarine cable is guided into the horn of the access part 2-2 and passes through the guide part 2-1, and is connected with the fan at the top of the pile foundation 9.

[0031] As shown in Figure 2 and 3 , the submarine cable protection assembly 3 includes a plurality of bending limiting units.The bending limiting units are arranged along the axial direction of the protected submarine cable 1, which effectively avoids the damage of the suspension section of the protected submarine cable 1 caused by repeated bending movement when it is impacted by sea current, and further avoids the damage of the submarine cable.A plurality of acceleration sensors 6 are respectively installed on the bending limiting unit located in the middle and the bending limiting unit spaced apart from the middle bending limiting unit.

[0032] As shown in Figure 2 , the bending limiting unit includes two limiting members 5 fixed by bolts.The opposite sides of the two limiting members 5 are provided with arc-shaped mounting grooves.The mounting grooves of the two limiting members 5 form a pipeline through groove matched with the protected submarine cable 1.The protected submarine cable 1 is arranged in the pipeline through groove, and the bending is limited by the peripheral limiting members 5.

[0033] Further, as shown in Figure 3 , the limiting member 5 is divided into clamping part 5-1 and limiting part 5-2 along the axial direction.The clamping part 5-1 is provided with an arc-shaped outer convex edge 5-3.The inner wall of the limiting part 5-2 is provided with a clamping groove 5-4 matched with the outer convex edge 5-3.In the adjacent two bending limiting units, the outer convex edge 5-3 on the clamping part 5-1 of the limiting member 5 is embedded in the clamping groove 5-4 of the limiting part 5-2 of the adjacent limiting member 5.

[0034] Further, the limiting member 5 provided with the acceleration sensor 6 is provided with an arc-shaped embedded groove 7. The acceleration sensor 6 is embedded in the embedded groove 7, thereby realizing the pre-fixing of the acceleration sensor 6, effectively avoiding the position deviation of the acceleration sensor when the limiting member 5 is sleeved to the protected submarine cable 1, thereby causing the error of the acceleration sensor 6 in detecting the submarine cable movement data.

[0035] As shown in Figure 4 The data output module 4 includes a signal transmitter 4-1 and a tower 4-2. The signal transmitter 4-1 is fixed on the operation and maintenance platform on the top of the pile foundation 9. The signal transmitter 4-1 is connected with the acceleration sensor 6 through the data optical fiber, and can receive and store the submarine cable movement data collected by the acceleration sensor 6 in time. The tower 4-2 covers the signal transmitter 4-1, effectively avoiding the corrosion of the signal transmission environment on the signal transmitter, and facilitating the signal transmission of the signal transmitter.

[0036] In the embodiment, the data optical fiber is arranged on the surface of the protected submarine cable 1, and the inner end penetrates through the submarine cable guide pipe 2 and is connected with the signal transmitter 4-1.

[0037] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A device for detecting the movement of a submarine cable's overhanging section, comprising a submarine cable guide pipe (2) in which a protected submarine cable (1) is arranged, the bottom of which extends out of the port of the submarine cable guide pipe (2) and forms a curved overhanging section with the sea bed (8); characterized in that: Also include a submarine cable protection assembly (3) and data output module (4); The submarine cable protection assembly (3) comprises a plurality of bending limiting units; each bending limiting unit is sheathed on the overhanging section of the submarine cable guide pipe (2), and is arranged in sequence along the axial direction of the protected submarine cable (1); A plurality of acceleration sensors (6) are arranged between the bending limiting unit and the protected submarine cable (1), for detecting the maximum amplitude of the overhanging section when impacted by sea current; The data output module (4) is used for receiving, storing and packaging the data collected by the acceleration sensors (6) and transmitting the data to the onshore command center.

2. A device for detecting movement of a marine cable overhang section according to claim 1, characterised in that: The submarine cable guide pipe (2) is divided into a guide part (2-1) and an access part (2-2) from top to bottom; the access part (2-2) is a horn structure with large outer diameter and small inner diameter; the guide part (2-1) is a hollow tube structure connected with the horn of the access part (2-2).

3. A device for detecting movement of a marine cable overhang section according to claim 1, characterized in that: The bending limiting unit comprises two fixed limiting members (5); the opposite sides of the two limiting members (5) are provided with arc-shaped mounting grooves; the mounting grooves of the two limiting members (5) form a pipeline through groove matched with the protected submarine cable (1); the protected submarine cable (1) is arranged in the pipeline through groove.

4. A device for detecting movement of a marine cable overhang section according to claim 3, characterised in that: The limiting member (5) is divided into a clamping part (5-1) and a limiting part (5-2) in sequence along the axial direction; the clamping part (5-1) is provided with an arc-shaped outer convex edge (5-3); the inner wall of the limiting part (5-2) is provided with a clamping groove (5-4) matched with the outer convex edge (5-3); in the adjacent two bending limiting units, the outer convex edge (5-3) on the clamping part (5-1) of the limiting member (5) is embedded in the clamping groove (5-4) of the limiting part (5-2) of the adjacent limiting member (5).

5. A device for detecting movement of a marine cable overhang section according to claim 3, characterised in that: The limiting member (5) on which the acceleration sensor (6) is mounted is provided with an arc-shaped embedded recess (7); the acceleration sensor (6) is embedded in the embedded recess (7).

6. A device for detecting movement of a marine cable overhang section according to claim 1, characterized in that: The data output module (4) comprises a signal transmitter (4-1); the signal transmitter (4-1) is fixed on the operation and maintenance platform on the top of the pile foundation (9); the signal transmitter (4-1) is connected with the acceleration sensor (6) through data optical fiber.

7. A device for detecting movement of a marine cable overhang section according to claim 6, characterised in that: The data output module (4) further comprises a tower barrel (4-2); the tower barrel (4-2) covers the signal transmitter (4-1).

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