Submarine cable laying early warning processing system and use method

Abstract

The invention relates to the technical field of submarine cable laying, and discloses a submarine cable laying early warning processing system and a use method. The submarine cable laying early-warning processing system is arranged on a submarine cable, one end of the submarine cable is connected to a cable disc at the stern of a submarine cable laying ship, the other end of the submarine cable is laid on a seabed, the submarine cable is laid through a cable laying machine on the submarine cable laying ship, and the submarine cable laying early-warning processing system comprises counterweight assemblies and buoyancy assemblies which are alternately arranged on the part, located in the sea, of the submarine cable at intervals. And each group of counterweight assembly and buoyancy assembly is connected with an alarm assembly. When the submarine cable encounters sudden extreme sea conditions in the submarine cable laying process, the underwater submarine cable can be prevented from drifting in a large range under the driving of ocean currents, meanwhile, early warning can be carried out on nearby ships, offshore platforms and other facilities, and the submarine cable is prevented from being scratched and damaged in the laying process.

Description

Technical Field

[0001] The present invention relates to the technical field of submarine cable laying, and particularly relates to a submarine cable laying early warning and processing system and a using method thereof. Background Art

[0002] At present, with the gradual development of offshore wind power projects from shallow waters to deep and far seas, the laying of submarine cables faces increasing challenges. Especially in deep and far sea areas, due to the increase in the length of submarine cables and the complexity of the marine environment, the construction difficulty and risk increase accordingly. If extreme sea conditions are encountered during the construction process, it may face double tests of offshore construction safety and submarine cable construction quality.

[0003] Currently, when encountering bad weather and sea conditions during the laying of submarine cables, most construction parties will choose to start the DP (Dynamic Positioning System) navigation and the cable laying machine will automatically pay out the cable during the pulling process. In actual operation, the submarine cable will drift extensively under the drive of ocean currents, which is likely to cause an increase in the local stress of the submarine cable, resulting in damage or even breakage of the fiber core. At the same time, there is also a risk of rubbing between the submarine cable and facilities such as ships, anchor cables, and offshore platforms, which will cause damage to the submarine cable. When the paid-out length of the submarine cable is too long, it is also necessary to use the method of post-flushing burial to deal with the submarine cable, which will also increase the cost of submarine cable laying. If more severe short-term sea conditions are encountered, the submarine cable will be cut, lead-sealed, and then the cable will be thrown away, and subsequent emergency repairs will be organized, which will also have a huge impact on the investment cost and the loss is extremely serious. It can be seen that when encountering bad sea conditions during the laying of submarine cables, the submarine cable is difficult to be effectively protected, is easily damaged, and causes economic losses. Summary of the Invention

[0004] In view of this, the present invention provides a submarine cable laying early warning and processing system and a using method thereof to solve the problem that the submarine cable is prone to rubbing or damage and causes economic losses when sudden extreme sea conditions occur during the laying of the submarine cable.

[0005] In a first aspect, the present invention provides a submarine cable laying early warning and processing system, which is arranged on the submarine cable. One end of the submarine cable is connected to the cable reel at the stern of the submarine cable laying ship, and the other end is laid on the seabed. The submarine cable is laid through the cable laying machine on the submarine cable laying ship, and includes a weight component and a buoyancy component that are alternately and spacedly arranged on the part of the submarine cable located in the sea, and an alarm component is connected to each group of the weight component and the buoyancy component.

[0006] Advantageous Effects

[0007] The reasonable alternating layout of the counterweight assembly and the buoyancy assembly ensures the stability of the submarine cable during the laying process, avoiding damage caused by large-scale drifting or excessive bending of the submarine cable under the influence of ocean currents in harsh sea conditions. Moreover, each counterweight assembly and buoyancy assembly is connected to an alarm assembly, which can reduce the risk of the submarine cable rubbing against surrounding ships or offshore platforms through real-time alarm prompts during the laying process of the submarine cable, and reduce the damage of the submarine cable.

[0008] In an alternative embodiment, it includes one set of the counterweight assembly and two sets of the buoyancy assembly, and the alarm assembly connected to the counterweight assembly is at the same height as the buoyancy assembly, and the alarm assembly connected to the buoyancy assembly floats on the sea surface.

[0009] Beneficial effects

[0010] The alarm assembly connected to the buoyancy assembly floats on the water surface, which can not only monitor the environment around the submarine cable in real time, but also improve the visibility of the alarm assembly in harsh sea conditions or at night with poor visibility; the alarm assembly connected to the counterweight assembly is at the same height as the buoyancy assembly, and when a ship passes above the submarine cable or there are reefs around the submarine cable, the alarm assembly can give an alarm and play a warning role.

[0011] In an alternative embodiment, the counterweight assembly includes: a plurality of counterweight blocks arranged at intervals along the extending direction of the submarine cable, and each counterweight block includes: a left counterweight ring and a right counterweight ring, one end of the left counterweight ring is hinged to one end of the right counterweight ring, and the other end of the left counterweight ring is fixedly connected to the other end of the right counterweight ring.

[0012] Beneficial effects

[0013] The setting of the counterweight blocks enables the submarine cable to withstand the acting force of the ocean current and provide a sinking force for the submarine cable during the laying process, thus effectively reducing the drifting risk of the submarine cable in complex sea conditions. The interval setting of the counterweight blocks optimizes the overall weight distribution of the counterweight assembly, enabling the counterweight assembly to maintain relative stability in extreme sea conditions.

[0014] In an alternative embodiment, a remote release device is provided on the counterweight block, and the remote release device has a locked state of fixedly connecting the other end of the left counterweight ring and the other end of the right counterweight ring and an unlocked state of remotely controlling the separation of the other end of the left counterweight ring and the other end of the right counterweight ring.

[0015] Beneficial effects

[0016] After the harsh sea conditions return to normal, the laid submarine cable will be retrieved by a cable laying machine. To ensure personnel safety and the quality of the submarine cable, the counterweight blocks can be remotely released through the remote release device, and the staff does not need to directly contact or manually remove the counterweight blocks, reducing the risk of human operation.

[0017] In an alternative embodiment, the buoyancy assembly includes: a plurality of buoyancy blocks arranged at intervals along the extending direction of the submarine cable, and each buoyancy block includes: a left buoyancy ring and a right buoyancy ring. One end of the left buoyancy ring is hinged to one end of the right buoyancy ring, and the other end of the left buoyancy ring is fixedly connected to the other end of the right buoyancy ring.

[0018] Beneficial effects

[0019] The buoyancy assembly provides uniform and continuous buoyancy support during the laying process of the submarine cable, effectively resisting the downward pulling force of the counterweight assembly on the submarine cable and maintaining the stability of the submarine cable in seawater. The buoyancy assembly cooperates with the counterweight assembly to make the submarine cable wavy in water, which can reduce collisions or damages caused by the instability of the submarine cable. The spaced arrangement of the buoyancy blocks enables the buoyancy assembly to adjust the buoyancy size according to actual needs under different sea conditions, can adapt to the requirements of different submarine cable lengths and weights, and ensures that the buoyancy of the submarine cable is always in the best state.

[0020] In an alternative embodiment, the alarm assembly includes: a housing, a distance sensing device, and an alarm device. The distance sensing device is arranged inside the housing, and the alarm device is arranged on the housing. The alarm device includes: a signal transmission device, a sound emitting device, and a light emitting device. The distance sensing device is electrically connected to the signal transmission device, and the signal transmission device is electrically connected to the sound emitting device and the light emitting device.

[0021] Beneficial effects

[0022] Under harsh sea conditions or at night, the signal transmission device and the distance sensing device of the alarm assembly can monitor the dynamic changes around the submarine cable in real time, and generate corresponding control signals when detecting that a ship or other obstacle is approaching. The control signal can control the warning sound emitted by the sound emitting device and the warning light emitted by the light emitting device, improving the visibility and audibility of the alarm signal, warning nearby ships or offshore platforms in time, preventing collisions and scratches with the submarine cable, and improving the safety during the laying process of the submarine cable.

[0023] In an alternative embodiment, a connection assembly is further included. The connection assembly includes: an elastic connection rope and a reel. One end of the elastic connection rope is connected to the alarm assembly, and the other end is connected to the counterweight assembly or the buoyancy assembly. The reel is arranged on the elastic connection rope.

[0024] Beneficial effects

[0025] The use of the elastic connection rope provides the alarm component with dynamic adaptability, enabling the alarm component to automatically adjust its length according to the fluctuations of seawater and the displacement changes of the submarine cable, avoiding excessive stretching or slackening of the alarm component caused by factors such as sea waves and ocean currents. The setting of the reel enables the elastic connection rope to be conveniently retracted and extended during use, ensuring that the alarm component can always maintain an effective connection with the buoyancy component or the counterweight component during the laying process of the submarine cable.

[0026] In an alternative embodiment, it further includes a submarine cable bending limiter, which is arranged on the part of the submarine cable close to the cable laying machine.

[0027] Beneficial effects

[0028] The setting of the submarine cable bending limiter can accurately control the minimum bending radius of the submarine cable, ensuring that the submarine cable always maintains an appropriate bending state throughout the laying process, and avoiding structural damage or failure caused by excessive bending.

[0029] In a second aspect, the present invention also provides a method for using a submarine cable early warning processing system, including the following steps:

[0030] When the sea conditions suddenly change, buoyancy components and counterweight components are alternately installed on the submarine cable, and the alarm component is connected when each group of the buoyancy components or the counterweight components is installed. After each group of the buoyancy components or the counterweight components is installed, a section of the submarine cable with a length greater than the bending radius of the submarine cable is released into the sea;

[0031] A submarine cable bending limiter is installed on the part of the submarine cable close to the cable laying machine.

[0032] Beneficial effects

[0033] During the laying process of the submarine cable when encountering extreme sea conditions, by installing buoyancy components and counterweight components and releasing the submarine cable, it is possible to prevent the submarine cable from drifting extensively due to the influence of waves or ocean currents. The alarm component can monitor whether there are ships or other obstacles approaching around the submarine cable and give timely warnings through the sound - emitting device and the light - emitting device to avoid damage to the submarine cable. At the same time, installing the submarine cable bending limiter avoids damage caused by excessive bending of the submarine cable.

[0034] In an alternative embodiment, when the sea conditions return to normal, the counterweight component is released through a remote release device, and then the submarine cable is towed by the cable laying machine and wound onto the cable reel.

[0035] Beneficial effects

[0036] After the sea conditions recover, the remote release device can separate the counterweight component, improving the efficiency and safety of the submarine cable recovery process. By using the cable laying machine to retrieve the submarine cable onto the cable reel, the recovery work of the submarine cable can be efficiently completed. Brief description of the drawings

[0037] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0038] Figure 1 Schematic diagram of the submarine cable laying early warning processing system according to an embodiment of the present invention;

[0039] Figure 2 Structural diagram of the alarm component according to an embodiment of the present invention;

[0040] Figure 3 Cross-sectional view of the counterweight block according to an embodiment of the present invention;

[0041] Figure 4 Top view of the counterweight block according to an embodiment of the present invention;

[0042] Figure 5 Bottom view of the counterweight block according to an embodiment of the present invention;

[0043] Figure 6 Cross-sectional view of the buoyancy block according to an embodiment of the present invention;

[0044] Figure 7 Top view of the buoyancy block according to an embodiment of the present invention.

[0045] Explanation of reference numerals:

[0046] 1, submarine cable;

[0047] 2, submarine cable laying ship;

[0048] 3, cable reel;

[0049] 4, seabed;

[0050] 5, cable laying machine;

[0051] 6, counterweight assembly, 61, counterweight block, 611, left counterweight ring, 612 right counterweight ring, 613, remote release device;

[0052] 7, buoyancy assembly, 71, buoyancy block, 711, left buoyancy ring, 712, right buoyancy ring;

[0053] 8, alarm assembly, 81, housing, 82, distance sensing device, 83, alarm device, 831, signal transmission device, 832, sound generating device, 833, light emitting device;

[0054] 9, sea surface;

[0055] 10. Connection components, 101. Elastic connection rope, 102. Reel;

[0056] 11. Submarine cable bending limiter;

[0057] 12. Connection ring. Detailed implementation manners

[0058] For the purpose of making the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0059] The following combines Figures 1 to 7 to describe the embodiments of the present invention.

[0060] According to an embodiment of the present invention, on the one hand, a submarine cable laying warning processing system is provided. The warning processing system is arranged on the submarine cable 1. One end of the submarine cable 1 is connected to the cable reel at the stern of the submarine cable laying ship 2, and the other end is laid on the seabed 4. The submarine cable 1 is laid through the cable laying machine 5 on the submarine cable laying ship 2. The warning processing system includes a counterweight assembly 6 and a buoyancy assembly 7 that are alternately and spaced apart on the part of the submarine cable 1 located in the sea, and an alarm assembly 8 is connected to each group of the counterweight assembly 6 and the buoyancy assembly 7.

[0061] The submarine cable 1 is a long-length submarine cable with a voltage of 220 kV, 330 kV or 500 kV and is laid through the submarine cable laying ship 2. Specifically, a cable reel 3 and a cable laying machine 5 are installed on the rear deck of the submarine cable laying ship. The submarine cable 1 is wound around the cable reel. When the submarine cable 1 laying work needs to be carried out, first, one end of the submarine cable 1 is laid into the seabed through the cable laying machine 5, and then the cable laying is gradually carried out along the traveling direction of the submarine cable laying ship 2. The cable reel 3 is mainly responsible for the winding and unwinding of the submarine cable 1; the cable laying machine 5 is responsible for pulling and controlling the cable laying process of the submarine cable 1. During the entire laying process, the cable laying machine ensures that the submarine cable is accurately placed along the predetermined path.

[0062] Most of the submarine cable 1 being laid is located in the sea, and a part of it is located between the sea surface 9 and the cable reel 3. Counterweight components 6 and buoyancy components 7 are fixedly installed on the submarine cable located in the sea water. The counterweight components 6 and the buoyancy components 7 are arranged alternately at intervals along the extending length direction of the submarine cable 1, such as being alternately arranged as a group of counterweight components 6 and a group of buoyancy components 7. The density of the counterweight component 6 is greater than the density of sea water, and the counterweight component 6 provides a downward gravity for the submarine cable 1. The density of the buoyancy component 7 is less than the density of sea water, ensuring that sufficient buoyancy can be provided for the submarine cable 1. Through the settings of the counterweight component 6 and the buoyancy component 7, the submarine cable 1 maintains an overall dynamic balance. And through the alternating settings of the counterweight component 6 and the buoyancy component 7, the counterweight component 6 exerts a downward pressure on the submarine cable 1, and the counterweight component 6 will drive a section of the submarine cable 1 to sink to form a trough section structure, while the buoyancy component 7 exerts an upward buoyancy on the submarine cable 1, and the buoyancy component 7 will drive a section of the submarine cable 1 to float to form a crest section structure, and the submarine cable 1 as a whole presents a structure similar to a "wave shape". The counterweight component 6 and the buoyancy component 7 are respectively connected to an alarm component 8. During the laying process of the submarine cable 1, the surrounding ships or offshore platforms can be reminded in real time through the alarm component 8, and the position of the submarine cable 1 can be indicated through the alarm component 8, so as to avoid the collision risk in time and reduce the damage of the submarine cable 1.

[0063] The submarine cable laying warning processing system ensures that when the submarine cable 1 is laid and encounters extreme sea conditions, the submarine cable 1 remains relatively stable underwater by alternately arranging the counterweight component 6 and the buoyancy component 7 on the submarine cable, preventing the submarine cable 1 from drifting due to waves and ocean currents. At the same time, the alarm component 8 connected to the counterweight component 6 and the buoyancy component 7 can monitor the surrounding environment of the submarine cable 1 in real time. Once it is found that a ship or an offshore platform approaches the submarine cable 1, the alarm component 8 can issue an alarm in time to avoid the collision of the submarine cable 1 and reduce the risk of damage to the submarine cable 1.

[0064] In one embodiment, the submarine cable laying warning processing system includes a group of counterweight components 6 and two groups of buoyancy components 7, and the alarm component 8 connected to the counterweight component 6 and the buoyancy component 7 are at the same height, and the alarm component 8 connected to the buoyancy component 7 floats on the sea surface 9.

[0065] In this embodiment, a group of counterweight components 6 and two groups of buoyancy components 7 are alternately arranged on the submarine cable 1. Under the action of the counterweight component 6 and the buoyancy component 7, the submarine cable 1 forms a "wave shape" structure with 1.5 cycles. The position of the counterweight component 6 is the trough, and the position of the buoyancy component 7 is the crest. The alarm component 8 connected to the counterweight component 6 is suspended in the sea water, and the suspension height is equal to the height at the crest formed by the buoyancy component 7; the alarm component 8 connected to the buoyancy component 7 floats on the sea surface. To ensure that the submarine cable 1 has a good dynamic buffering effect when suspended in water, the interval distance between the counterweight component 6 and the buoyancy component 7 is required to be greater than or equal to 2.5 times the minimum bending radius of the submarine cable 1, and the "wave shape" suspension length of the submarine cable 1 reaches "1.5 wave cycles".

[0066] The alarm component 8 connected to the buoyancy component floats on the sea surface, enhancing the alarm effect of the alarm component 8. Especially in bad weather or poor visibility, it can effectively remind surrounding ships and platforms to avoid collision damage to the submarine cable 1. The alarm component 8 on the counterweight component 6 is at the same height as the buoyancy component 7. When there is a ship passing above the submarine cable 1 or there are obstacles such as hidden reefs, the alarm component can sense and give an alarm in time to avoid collision or scratching of the submarine cable 1.

[0067] In other embodiments, multiple groups of counterweight components 6 and buoyancy components 7 can also be alternately arranged on the submarine cable 1, such as three groups of counterweight components 6 and buoyancy components 7 or four groups of counterweight components 6 and buoyancy components 7, etc.

[0068] In other embodiments, the alarm component 8 connected to the counterweight component 6 can also float on the sea surface.

[0069] In one embodiment, the counterweight component 6 includes: a plurality of counterweight blocks 61 arranged at intervals along the extending direction of the submarine cable 1. The counterweight block 61 includes: a left counterweight ring 611 and a right counterweight ring 612. One end of the left counterweight ring 611 is hinged to one end of the right counterweight ring 612, and the other end of the left counterweight ring 611 is fixedly connected to the other end of the right counterweight ring 612.

[0070] The counterweight component 6 includes a plurality of counterweight blocks 61. The plurality of counterweight blocks 61 are installed at intervals along the extending direction of the submarine cable 1 and the interval distances are equal. The overall shape of the counterweight block 61 is a hollow cylinder, and the diameter of the hollow cylinder is slightly larger than the diameter of the submarine cable 1, so that the counterweight block 61 can be sleeved on the submarine cable 1. Specifically, each counterweight block 61 is formed by connecting a left counterweight ring 611 and a right counterweight ring 612, and one end of the left counterweight ring 611 is connected to one end of the right counterweight ring 612 through a hinge structure, while the other end of the left counterweight ring 611 and the other end of the right counterweight ring 612 are connected together by a fixed connection method. In addition, a connecting ring 12 is also installed on the counterweight component 6 to facilitate connection with the alarm component 8.

[0071] The setting of the counterweight component 6 enhances the underwater adaptability of the submarine cable 1, improves the buffering performance of the submarine cable 1, and can cope with the problems of shaking or instability of the submarine cable 1 caused by underwater ocean currents.

[0072] In another embodiment, the overall shape of the counterweight block 61 can also be other shapes such as a hollow cube, a hollow ellipsoid, and a hollow sphere.

[0073] In one embodiment, a remote release device 613 is provided on the counterweight block 61. The remote release device 613 has a locked state of fixedly connecting the other end of the left counterweight ring 611 and the other end of the right counterweight ring 612 and an unlocked state of remotely separating the other end of the left counterweight ring 611 and the other end of the right counterweight ring 612 by remote control.

[0074] One end of the left counterweight ring 611 and the right counterweight ring 612 is hinged, and a remote release device 613 is provided at the other end. The remote release device 613 can be remotely controlled by the staff on the submarine cable laying vessel 2. The remote release device 613 includes two states: a locked state and an unlocked state. When the remote release device 613 is in the locked state, the left counterweight ring 611 and the right counterweight ring 612 are fixedly connected through a locking mechanism to ensure that the counterweight block 61 can be fixed at a predetermined position of the submarine cable 1; when the counterweight assembly 6 needs to be recovered, the unlocked state of the remote release device 613 is activated by remote control to trigger the unlocking mechanism, and the left counterweight ring 611 and the right counterweight ring 612 are automatically separated, and the counterweight block 61 is also separated from the submarine cable 1, facilitating the floating and recovery of the submarine cable 1.

[0075] After the severe sea conditions return to normal, the submarine cable laying early warning processing system will carry out traction recovery through the cable laying machine 5, and remotely release the counterweight block 61 through the remote release device 613 to prevent accidents when manually removing the counterweight block 61, ensuring personnel safety and the quality of the recovered submarine cable 1.

[0076] In one embodiment, the buoyancy assembly 7 includes: a plurality of buoyancy blocks 71 arranged at intervals along the extending direction of the submarine cable 1. The buoyancy block 71 includes: a left buoyancy ring 711 and a right buoyancy ring 712. One end of the left buoyancy ring 711 and one end of the right buoyancy ring 712 are hinged, and the other end of the left buoyancy ring 711 and the other end of the right buoyancy ring 712 are fixedly connected.

[0077] The buoyancy assembly 7 includes a plurality of buoyancy blocks 71. The buoyancy blocks 71 are made of low-density materials such as polyethylene, polyurethane foam, and polytetrafluoroethylene, and are arranged at equal intervals along the extending direction of the submarine cable 1. The overall shape of the buoyancy block 71 is a hollow cube structure, and a hollow cylinder is provided at the center of the cube. The diameter of the hollow cylinder is slightly larger than the diameter of the submarine cable, and it can wrap and fix the periphery of the submarine cable 1. Each buoyancy block 71 includes a left buoyancy ring 711 and a right buoyancy ring 712. One end of the left buoyancy ring 711 and one end of the right buoyancy ring 712 are connected through a hinge structure, and the other end of the left buoyancy ring 711 and the other end of the right buoyancy ring 712 are connected through a fixed connection method to ensure that each buoyancy block 71 will not loosen or fall off during the entire laying process of the submarine cable 1. A connecting ring 12 is also installed on the buoyancy assembly 7 for connecting with the alarm assembly.

[0078] In another embodiment, the buoyancy block 71 can also be in the shape of a hollow cylinder, a hollow ellipsoid, a hollow sphere, etc.

[0079] In one embodiment, the alarm component 8 includes: a shell 81, a distance sensing device 82 and an alarm device 83. The distance sensing device 82 is arranged in the shell 81, and the alarm device 83 is arranged on the shell 81. The alarm device 83 includes: a signal transmission device 831, a sound device 832 and a light-emitting device 833. The distance sensing device 82 is electrically connected to the signal transmission device 831, and the signal transmission device 831 is electrically connected to the sound device 832 and the light-emitting device 833.

[0080] The shell 81 of the alarm component 8 is a hollow structure, an alarm device 83 is installed on the shell 81, and a distance sensing device 82 is arranged inside the shell 81. The alarm device 83 includes a signal transmission device 831, a sound device 832 and a light emitting device 833. The signal transmission device 831 is electrically connected to the distance sensing device 82, can receive a signal from the distance sensing device 82, and transmit the received signal to the sound device 832 and the light emitting device 833.

[0081] Furthermore, the distance sensing device 82 is arranged at the inner center of the housing 81, and can monitor the environment around the submarine cable 1 in real time and detect objects near the submarine cable 1, and send the detected danger signal to the signal transmission device 831. A radar device and a visual recognition system are arranged in the distance sensing device 82. The radar device can sense in real time whether there are other objects such as ships approaching the submarine cable. When a ship, an offshore floating platform or a large foreign object enters the detection range of the distance sensing device 82, the built-in radar device of the distance sensing device 82 can perform radar sensing on the relevant objects and measure the distance at the same time, generate corresponding sensing signals, and feedback the sensing distance in real time according to the sensing interval of the radar device; the visual recognition system can observe objects close to the submarine cable 1. After receiving the signal feedback, the staff can observe the status of the submarine cable 1 in real time through the visual recognition system of the distance sensing device 82 to determine whether the object will affect the laying of the submarine cable 1 or damage the submarine cable.

[0082] The signal transmission device 831 is arranged on the outer wall of the upper surface of the housing and is mainly used to receive the signals transmitted by the distance sensing device 82. The signal transmission device 831 integrates the intelligent construction site electronic fence system. The electronic fence system can connect with the sound emitting device 832, the light emitting device 833 and the distance sensing device 82 to form a multi-alarm system. The ship side, the shore base (i.e., the onshore command and control center) and the online management system can monitor and coordinate the submarine cable 1 in real time to ensure that the staff can conduct all-round "trinity" management and control. When the distance sensing device 82 detects that a ship, an offshore platform or other obstacles are approaching, the electronic fence system can immediately transmit the control signal to the sound emitting device 832 and the light emitting device 833 to trigger an alarm signal, and feedback the signals collected by the signal transmission device 831 to the staff on the submarine cable laying ship 2 for the staff to evaluate and handle the problems occurring during the laying process of the submarine cable 1. At the same time, the operation signals of the staff will be fed back to the sound emitting device 832 and the light emitting device 833 through the intelligent construction site electronic fence system to quickly handle emergencies.

[0083] When the distance sensing device 82 detects potential dangers around the submarine cable 1, the light emitting device 833 switches to a flashing state to warn the approaching ships. Especially in the case of poor visibility at night, the flashing of the light emitting device 833 can effectively warn the ships around the submarine cable 1. The light emitting device 833 is located on the outer wall of the upper surface of the housing 81 and is used to emit visible light signals to improve the visual visibility of the position of the submarine cable 1 and at the same time give position reminders to ships and other offshore platforms. The sound emitting device 832 is also arranged on the outer wall of the upper surface of the housing 81 and is used to emit alarm sounds. The sound emitting device can emit a loud enough alarm sound when the distance sensing device 82 detects potential dangers in the surrounding environment to give voice warnings to the staff on nearby ships or platforms.

[0084] A reserve battery and a positioning device are also arranged inside the alarm component 8, which enhances the emergency response ability of the alarm component 8. The reserve battery can provide necessary power supply for the alarm component 8, and the power of the reserve battery can ensure that the alarm component 8 can be used for more than 24 hours to ensure that it can operate for a long time and emit alarm signals in case of emergencies. The positioning device is equipped with positioning systems such as Beidou and GPS and can monitor the position information of the alarm component 8 in real time. If the alarm component 8 is accidentally disconnected or lost for other reasons, the staff can quickly locate the position of the alarm component 8 through the positioning system and retrieve it. When the alarm component 8 is in an abnormal state, such as being impacted, squeezed or having an abnormal disconnection, the alarm device 83 will also feedback the signal to the staff on the submarine cable laying ship 2 through the signal transmission device 831 to remind the staff to check the alarm component 8 in time and check the cause of the fault.

[0085] In one embodiment, the submarine cable laying warning processing system further includes a connection assembly 10, and the connection assembly 10 includes: an elastic connection rope 101 and a reel 102. One end of the elastic connection rope 101 is connected to the alarm assembly 8, and the other end is connected to the counterweight assembly 6 or the buoyancy assembly 7. The reel 102 is disposed on the elastic connection rope 101.

[0086] The connection assembly 10 includes an elastic connection rope 101 and a reel 102. One end of the elastic connection rope 101 is connected to the connection ring 12 on the alarm assembly 8, and the other end is connected to the connection ring 12 on the counterweight assembly 6 or the buoyancy assembly 7. The reel 102 is installed on the elastic connection rope 101 for taking in and releasing the elastic connection rope 101. When it is necessary to adjust the connection distance between the alarm assembly 8 and the counterweight assembly 6 or the buoyancy assembly 7, the reel 102 can effectively take in or release the elastic connection rope 101 to meet the distance requirements under different sea conditions.

[0087] The elastic connection rope 101 can ensure that the alarm assembly 8 can freely stretch and contract along with the change of the submarine cable 1 during the laying process of the submarine cable 1, ensuring that the alarm assembly 8 can maintain a stable height and position when the sea water fluctuates and the submarine cable 1 displaces; the function of the reel 102 is to provide a flexible taking-in and releasing function for the elastic connection rope 101, and the staff can adjust the position and distance of the alarm assembly 8 according to actual needs, so as to ensure that the alarm assembly 8 always maintains a reasonable connection and position with the submarine cable 1.

[0088] In one embodiment, the submarine cable laying warning processing system further includes a submarine cable bending limiter 11, and the submarine cable bending limiter 11 is disposed on the part of the submarine cable 1 close to the cable laying machine 5.

[0089] The submarine cable bending limiter 11 is disposed in the sea water and close to the stern of the submarine cable laying ship 2. The submarine cable 1 passes through the cable laying machine 5 and enters the submarine cable bending limiter 11, and enters the sea water from inside the submarine cable bending limiter 11 for laying the submarine cable 1. The submarine cable bending limiter 11 controls the bending radius of the submarine cable 1 by means of physical limitation, provides necessary support and protection for the submarine cable 1, and ensures that the submarine cable 1 is within a safe bending range in the area close to the cable laying machine 5. The submarine cable 1 is released into the sea water through traction in the cable laying machine 5. If the bending radius of the submarine cable 1 is too small, the core of the submarine cable 1 may be broken under the action of the sea water current, which will affect the transmission performance of the submarine cable 1. The submarine cable bending limiter 11 can ensure that the submarine cable 1 will not be structurally damaged due to excessive bending during the laying process.

[0090] According to an embodiment of the present invention, on the other hand, there is also provided a method for using a submarine cable warning processing system, which is applied to the submarine cable laying warning processing system. The using method includes the following steps:

[0091] Step 1: When the sea conditions change suddenly, buoyancy components 7 and counterweight components 6 are alternately installed on the submarine cable 1, and an alarm component 8 is connected when each group of buoyancy components 7 or counterweight components 6 is installed. After each group of buoyancy components 7 or counterweight components 6 is installed, a section of the submarine cable 1 with a length greater than the bending radius of the submarine cable 1 is released into the sea;

[0092] When drastic changes in sea conditions occur during the laying of the submarine cable 1, such as strong waves, ocean current changes, sudden storms or typhoons and other extreme sea conditions, the staff needs to alternately install buoyancy components 7 and counterweight components 6 on the submarine cable 1. It is possible to install the buoyancy components 7 or the counterweight components 6 first, and the number of buoyancy components 7 or counterweight components 6 can also be adjusted adaptively. In this embodiment, a total of two groups of buoyancy components 7 and one group of counterweight components 6 are provided, and the buoyancy components 7 are installed first and then the counterweight components 6. After the first group of buoyancy components 7 is installed, a group of alarm components 8 is connected to the first group of buoyancy components 7. After the installation is completed, the staff needs to release a section of the submarine cable 1 into the sea, and the length of the released submarine cable 1 is greater than or equal to 2.5 times the bending radius length of the submarine cable 1. Then the installation of the first group of counterweight components 6 is carried out, and a group of alarm components 8 is connected to the first group of counterweight components 6. After the installation is completed, another section of the submarine cable 1 is released into the sea. According to this step, the installation of two groups of buoyancy components 7, one group of counterweight components 6 and three groups of alarm components 8 and the release of the submarine cable 1 are gradually completed. In other embodiments, the buoyancy components 7, counterweight components 6 and alarm components 8 are also installed in this way. Of course, it is also possible to install the counterweight components 6 first and then the buoyancy components 7.

[0093] Through the alternating layout of the counterweight components 6 and the buoyancy components 7, the submarine cable 1 can present a structure with multiple wave crests and wave troughs in the water, forming a "wavy" state, preventing the submarine cable 1 from undergoing large-scale offsets or drifts caused by ocean currents, and ensuring the stability of the submarine cable 1 in seawater; the suspended length of the submarine cable 1 reaches "1.5 wave periods", that is, the buoyancy and gravity of the submarine cable 1 in the water are balanced, ensuring that the submarine cable 1 can maintain a stable suspended state under different sea conditions, ensuring that the submarine cable 1 has a good dynamic buffering effect when suspended in the water, avoiding excessive sinking or surfacing, thereby reducing the risk of damage caused by unstable positions. The alarm component can monitor the changes in the surrounding environment during the laying of the submarine cable in real time. Once it detects that a ship, offshore platform or other obstacle approaches the submarine cable, the alarm component will issue an alarm through the sound-emitting device and the light-emitting device, reminding the surrounding ship or platform personnel to take evasive measures to ensure the safety of the submarine cable.

[0094] Install a submarine cable bending limit member 11 on the part of the submarine cable 1 close to the cable laying machine 5.

[0095] After the laying of the submarine cable 1 is completed, it is also necessary to install the cable bending restrictor 11. The cable bending restrictor 11 also needs to be installed at a position near the stern of the cable laying machine 5. The submarine cable 1 passes through the cable bending restrictor 11 and enters the sea water, ensuring that the submarine cable 1 always maintains a reasonable bending radius during the laying process and preventing the submarine cable 1 from being overly bent during the cable laying process.

[0096] In one embodiment, when the sea conditions return to normal, the counterweight assembly 6 is released through the remote release device 613, and then the cable laying machine 5 is used to tow the submarine cable 1 to be wound onto the cable drum 3.

[0097] When the sea conditions return to normal, it is necessary to recover the counterweight assembly 6, the buoyancy assembly 7, and the alarm assembly 8 on the submarine cable 1. The cable laying machine 5 tows the submarine cable 1 to be recovered into the cable drum 3, and the counterweight assembly 6, the buoyancy assembly 7, and the alarm assembly 8 on the submarine cable 1 are removed and recovered simultaneously during the process of recovering the submarine cable 1. Considering that the counterweight assembly 6 is relatively heavy, if a system failure occurs during the recovery process and the counterweight assembly 6 cannot be recovered, the remote release device 613 can be used to release the fixed connection of the counterweight assembly 6, separating the counterweight assembly 6 from the submarine cable 1. The cable laying machine 5 tows the submarine cable 1, and the submarine cable 1 with the counterweight assembly 6 removed is safely wound onto the cable drum 3 to complete the recovery operation. At the same time, releasing the counterweight assembly 6 can also ensure that the submarine cable 1 is not pulled or damaged by the counterweight assembly 6 when being retrieved, avoiding unnecessary stress or deformation of the submarine cable 1 during the recovery process.

[0098] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A submarine cable laying early warning processing system, arranged on a submarine cable (1), one end of the submarine cable (1) is connected to a cable drum (3) at the stern of a submarine cable laying vessel (2), and the other end is laid on the seabed (4), the submarine cable (1) is laid by a cable laying machine (5) on the submarine cable laying vessel (2), characterized in that: It comprises counterweight assemblies (6) and buoyancy assemblies (7) which are arranged alternately and at intervals on the part of the submarine cable (1) located in the sea, and each group of the counterweight assemblies (6) and the buoyancy assemblies (7) is connected to an alarm assembly (8).

2. The submarine cable laying early warning processing system according to claim 1 is characterized in that: The invention comprises a group of the counterweight components (6) and two groups of the buoyancy components (7), wherein the alarm component (8) connected to the counterweight components (6) and the buoyancy components (7) are located at the same height, and the alarm component (8) connected to the buoyancy components (7) floats on the sea surface (9).

3. The submarine cable laying early warning processing system according to claim 1 is characterized in that: The counterweight assembly (6) comprises: a plurality of counterweight blocks (61) arranged at intervals along the extension direction of the submarine cable (1); the counterweight blocks (61) comprise: a left counterweight ring (611) and a right counterweight ring (612); one end of the left counterweight ring (611) is hinged to one end of the right counterweight ring (612); and the other end of the left counterweight ring (611) is fixedly connected to the other end of the right counterweight ring (612).

4. The submarine cable laying early warning processing system according to claim 3 is characterized in that: The counterweight block (61) is provided with a remote release device (613), and the remote release device (613) has a locking state in which the other end of the left counterweight ring (611) and the other end of the right counterweight ring (612) are fixedly connected, and an unlocking state in which the other end of the left counterweight ring (611) and the other end of the right counterweight ring (612) are separated by remote control.

5. The submarine cable laying early warning processing system according to claim 1, characterized in that: The buoyancy assembly (7) comprises: a plurality of buoyancy blocks (71) arranged at intervals along the extension direction of the submarine cable; the buoyancy blocks (71) comprise: a left buoyancy ring (711) and a right buoyancy ring (712); one end of the left buoyancy ring (711) is hinged to one end of the right buoyancy ring (712); and the other end of the left buoyancy ring (711) is fixedly connected to the other end of the right buoyancy ring (712).

6. The submarine cable laying early warning processing system according to claim 1, characterized in that: The alarm component (8) comprises: a housing (81), a distance sensing device (82) and an alarm device (83); the distance sensing device (82) is arranged in the housing (81); the alarm device (83) is arranged on the housing (81); the alarm device (83) comprises: a signal transmission device (831), a sounding device (832) and a light-emitting device (833); the distance sensing device (82) is electrically connected to the signal transmission device (831); and the signal transmission device (831) is electrically connected to the sounding device (832) and the light-emitting device (833).

7. The submarine cable laying early warning processing system according to claim 1, characterized in that: The invention also comprises a connection assembly (10), wherein the connection assembly (10) comprises: an elastic connection rope (101) and a reel (102), wherein one end of the elastic connection rope (101) is connected to the alarm assembly (8), and the other end is connected to the counterweight assembly (6) or the buoyancy assembly (7), and the reel (102) is arranged on the elastic connection rope (101).

8. The submarine cable laying early warning processing system according to any one of claims 1 to 7, characterized in that: It also comprises a submarine cable bending limiter (11), wherein the submarine cable bending limiter (11) is arranged at a portion of the submarine cable (1) close to the cable laying machine (5).

9. A method for using a submarine cable early warning processing system, applied to the submarine cable laying early warning processing system according to any one of claims 1 to 8, characterized in that: The following steps are involved: When the sea conditions suddenly change, the buoyancy components (7) and the counterweight components (6) are installed alternately on the submarine cable (1), and the alarm component (8) is connected when each group of the buoyancy components (7) or the counterweight components (6) is installed. After each group of the buoyancy components (7) or the counterweight components (6) is installed, a section of the submarine cable (1) having a length greater than its own bending radius is thrown into the sea; A submarine cable bending limiter (11) is installed at a portion of the submarine cable (1) close to the cable laying machine (5).

10. The method for using the submarine cable early warning processing system according to claim 9, characterized in that: When the sea condition returns to normal, the counterweight assembly (6) is released by means of a remote release device (613), and then the submarine cable (1) is pulled and reeled onto the cable drum (3) by means of the cable laying machine (5).

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