173 results about "Submarine cable" patented technology

This invention discloses a submarine cable anti-scouring device and its construction method, applicable to the field of submarine cable protection technology. The invention includes a filter layer and a flexible protective layer. The filter layer comprises multiple filter pads arranged sequentially along the axial direction of the submarine cable on the surface of the cable and / or the seabed, with adjacent filter pads overlapping. The flexible protective layer comprises multiple flexible protective pads arranged sequentially along the axial direction of the cable on the filter layer. At least one flexible protective pad is provided at the overlap of any two adjacent filter pads to press the filter layer firmly against the surface of the cable and / or the seabed. This application, through the cooperation of the filter layer and the flexible protective layer, improves the stability of the submarine cable anti-scouring device to reduce inter-segment displacement and possesses adaptive capability to seabed subsidence deformation, effectively enhancing the anti-scouring effect of the submarine cable.

The application discloses a kind of corrosion-resistant double-armored submarine cable and preparation method thereof, it is related to submarine cable technical field.The corrosion-resistant double-armored submarine cable includes outer sheath layer, water barrier layer, double-armored layer, insulating inner liner, filling layer, insulating layer, copper conductor in turn from surface to inside;The outer sheath layer is obtained by extruding coating on the surface of double-armored layer by corrosion-resistant submarine cable material;The corrosion-resistant submarine cable material includes the following raw material components: by mass parts, 75-90 parts of high-density polyethylene, 30-50 parts of ultra-high molecular weight polyethylene, 10-25 parts of modified microfiber, 8-15 parts of ethylene-vinyl acetate copolymer, 0.2-0.5 parts of antioxidant, 1-1.2 parts of lubricant.The application optimizes sheath layer material, solves the problems of existing double-armored submarine cable corrosion failure, short service life, unstable performance and other problems, meets the demand of long-term service reliability.

The application provides a kind of anti-pressure anti-torsion submarine cable, including center support, a plurality of conductor units, a plurality of edge gap supports, optical fiber units, signal transmission units and protective anti-torsion anti-pressure units.The conductor units are arranged around the periphery of the center support, and the edge gap supports are arranged between adjacent conductor units.The optical fiber units and the signal transmission units are respectively embedded in different edge gap supports.The protective anti-torsion anti-pressure units include, from outside to inside, a first protective layer, a first water-blocking layer, a first anti-tension anti-torsion armor layer, a second protective layer, a second anti-tension anti-torsion armor layer, a second water-blocking layer, and a third protective layer.The application realizes surface contact pressure resistance through the center support, realizes anti-torsion through the double armor layer of reverse cross-weaving, isolates electromagnetic interference and provides rigid protection through the independently embedded optical fiber and signal units, and solves the problem of insufficient anti-pressure, anti-torsion, optical and electrical interference, and water-blocking performance of the existing submarine cable by combining the multi-layer continuous water-blocking structure.

The application discloses a kind of wind farm power collection system topology design method and system based on improved genetic algorithm, it is related to system topology design technical field, to solve the core problem of wind turbine grouping and submarine cable connection collaborative optimization under high-dimensional constraint, accurate matching of load flow and cost.The method determines the maximum number of wind turbines and the number range of feeder by parameter calculation module simultaneous equations, grouping connection module constructs initial scheme by polar grouping combined with minimum spanning tree algorithm, cost modeling module calculates cost by exclusive function, iteration optimization module dynamically adjusts grouping and the number of wind turbines based on improved genetic algorithm, constraint screening module excludes illegal scheme by penalty formula, and finally generates optimal and suboptimal topology graph containing core parameters.The application divides high-dimensional optimization problem into layers, considers constraint satisfaction degree and economy, significantly reduces submarine cable investment cost, improves design efficiency and engineering feasibility, and is suitable for various offshore wind farm power collection system topology design.

This invention discloses a method for preparing copper-aluminum gradient alloy submarine cable welding joints. Copper-aluminum alloy powders with different mixing ratios are prepared by mechanical stirring. The powder blanks arranged in a gradient are then vibrated, densified, and extruded using cold isostatic pressing (COP). After preparing the copper-aluminum gradient blanks through COP, the copper-aluminum gradient material is prepared by equal-diameter angular extrusion (ECE) and heat treatment. The COP and ECE processes used in this invention achieve controllable copper-aluminum ratios through pre-mixing. The ECE process, with deformation occurring without altering the material's cross-sectional area and shape, achieves good metallurgical bonding, transition of composition and properties, and excellent grain refinement through shearing generated by multiple deformations.

This invention provides a grid-connected energy storage system and a stable operation control method for offshore wind power off-grid operation. The system consists of multiple offshore wind turbines connected in parallel. Each turbine is connected to an AC collection submarine cable via a turbine-side DC / DC converter, a grid-side AC / DC converter, and then connected to the turbine-side AC bus via a grid-side transformer. The turbine-side AC bus transmits power to the AC grid through a flexible DC-DC transmission system, and also connects to an energy storage battery via a grid-connected energy storage converter. The flexible DC-DC transmission system includes an AC grid-side transformer, a turbine-side MMC converter station, an onshore MMC converter station, and a grid-side transformer. This invention combines an offshore wind power off-grid operation system with an energy storage system, utilizing the margin of the energy storage system to achieve grid-connected / off-grid switching for the offshore wind power system. The energy storage system smooths out power fluctuations caused by wind energy fluctuations, enabling off-grid operation of the system.

The application discloses a kind of multistage synergic covalent grafting type hydrolysis-resistant self-cleaning PET submarine cable monofilament and preparation method, the monofilament includes three parts of core layer, skin layer and surface layer, the core layer is the high viscosity polyethylene terephthalate resin containing carbodiimide anti-hydrolysis agent;Skin layer is the modified PET resin of functional polysiloxane covalent grafting, wherein the functional polysiloxane has epoxy end group or isocyanate end group, and main chain has Si-H group;Surface layer is the fluorine-free low surface energy layer formed by polyvinyl long side chain alkane polysiloxane and residual Si-H group in skin layer through hydrosilylation reaction.The application significantly improves the durability of monofilament in humid heat environment, so that it is suitable for long-term humid heat service environment such as marine cable and industrial fabric, and can maintain stable mechanical strength and self-cleaning performance for a long time.

This utility model belongs to the technical field of marine oil and gas and power development equipment, and discloses a vibration damping device for marine risers and submarine cables. The device includes a damping cylinder, a positioning component, a support rod, a sleeve half-ring, bolt holes, and bolts. The damping cylinder is rigidly connected to the sleeve half-ring via the support rod and consists of two symmetrical half-cylinder structures, which are bolted together and fitted around the marine riser or submarine cable. The positioning component can be quickly installed and removed, providing reliable axial positioning for the vibration damping device. This utility model achieves efficient vibration reduction based on the synergistic mechanism of added mass efficiency and hydrodynamic damping energy dissipation. It has a simple structure, convenient and diverse installation methods, and is unaffected by ocean current direction or component attitude, making it widely applicable to vibration control of marine pipelines.

The present application relates to a kind of submarine cable storage device and tension bending test system, submarine cable storage device includes multiple cable storage racks, all cable storage racks are enclosed into annular cable storage structure, annular cable storage structure has first end and second end, opening is formed between first end and second end, traction machine is provided at opening, each cable storage rack includes rack body, rack body is provided with multiple first transverse wire wheels sequentially arranged from top to bottom, and first transverse wire wheel is used to bear submarine cable.The present application also relates to a kind of submarine cable tension bending test system based on the above-mentioned submarine cable storage device.The present application can carry out the quick switching of different submarine cable sample bending test, and improve test efficiency.

The utility model discloses a kind of temperature response devices for simulating submarine cable burying depth in the field of simulation device, including heating water tank and simulation water tank, water is loaded in the heating water tank, and heating device is provided;The simulation water tank is connected with heating water tank by water pump and water pipe;Sand layer is provided in the simulation water tank, optical fiber is buried in the sand layer, and a plurality of temperature sensors are equipped on the optical fiber in the sand layer;It further includes controller, and the temperature sensor is connected with controller.The device provided by the utility model is connected by water pipe and water pump by setting heating water tank and simulation water tank, and heating water tank and simulation water tank, by pumping the water in heating water pipe to simulation water tank, and pumping back to heating water tank in simulation water tank, the dynamic simulation of environment in simulation water tank is realized, sand layer is set in simulation water tank, to meet the demand of simulating submarine environment in simulation water tank.

The application discloses a high-voltage alternating-current submarine cable grounding system fault current calculation method and system and a storage medium, and steps are as follows: based on Thevenin equivalent theorem, power supply and power consumption equipment are respectively equivalent to impedance and series voltage source combination and load impedance; combined with double-ended grounding characteristics, the submarine cable loop is equivalent to a π type, and a three-phase equivalent circuit is constructed; the fault phase is determined, and the submarine cable is divided into left and right sides at the fault point; based on Kirchhoff's theorem, voltage loop equations are written, and matrix recursive rules are derived combined with double-side elimination principle. The analytical relationship between the power supply side, the short-circuit side submarine cable main section and the fault circulating current is established according to the recursive rules. The fault point current equation is taken as a boundary condition, and the left side sheath fault circulating current distribution is solved. The right side distribution is obtained by repeating the above steps on the right side, and then the whole line distribution of the fault phase is obtained. The method can accurately calculate the circulating current distribution, improve the fault analysis accuracy and efficiency, and provide support for submarine cable operation and maintenance.

The application relates to the field of submarine cable turntables, and discloses a submarine cable turntable structure of a submarine cable repairing special ship, which comprises a submarine cable turntable, a mobile trolley is installed on the outer side of an annular guide rail, a cable pushing mechanism is installed on the side close to the center of the submarine cable turntable, the cable pushing mechanism comprises a hydraulic cylinder, a hydraulic telescopic rod and a submarine cable clamping ring, a ball sleeve is installed in the inside of the submarine cable clamping ring, universal ball bearings are installed on the inner side of the ball sleeve, a driven gear ring is installed on the outer side of the lower end of the submarine cable turntable, a guide ring is arranged in the inside of the bottom turntable, an embedded groove is arranged on the upper surface of the guide ring, rotating ear plates are installed on the outer side of the embedded groove, and guide rotating wheels are installed in the inside of the rotating ear plates. In the rotating process, rotating bearings are meshed with the driven gear ring on the outer side of the submarine cable turntable to assist the overall rotation of the submarine cable turntable, meanwhile, a plurality of auxiliary gears arranged in an array on the outer side of the submarine cable turntable are meshed with the driven gear ring, and the submarine cable turntable can also be prevented from deviating when rotating.

This application discloses a landing vessel for recovering submarine cables, comprising a hull and a feed rack. The feed rack is disposed on the hull and has an inlet end and an outlet end. The feed rack has an internal feed channel that extends through the inlet end and the outlet end. The middle portion of the feed channel protrudes integrally from the two end portions, making the feed channel as a whole arc-shaped structure. The two end portions of the feed channel gradually increase in inner diameter away from the middle portion, forming a flared structure. The submarine cable is adapted to enter the feed channel from the inlet end and exit through the outlet end. This restricts the bending amplitude of the submarine cable entering the feed rack through the feed channel, thereby preventing the submarine cable from bending during the recovery process.

The present application relates to a kind of hyperbranched polyvinyl fluoride resin prepared by suspension polymerization with chain transfer agent and its preparation and application, the preparation method of the resin includes: under the condition of using at least one initiator, at least one chain transfer agent, at least one dispersing agent, make polyvinyl fluoride occur polymerization reaction;The chain transfer agent is at least one chain transfer agent of multiple chain transfer sites (≥2) or the combination of liquid phase transfer agent and gas phase transfer agent forms multiple chain transfer sites.Compared with prior art, the polyvinyl fluoride resin of the present application has hyperbranched configuration, and high mechanical strength and good processing performance are considered, the resin is especially suitable for being used as the inner lining material of marine non-adhesive flexible riser, submarine cable packaging layer and other fields, its excellent chemical corrosion resistance, gas permeation resistance and heat aging performance can effectively block the erosion of external corrosive medium to internal tensile armor layer.

The application belongs to the technical field of power cables, and discloses a conductor connecting method of a submarine cable flexible joint. The method comprises the following steps: respectively unfolding conductor filaments of a first flexible joint and a second flexible joint to be connected layer by layer, restoring the innermost conductor filaments to obtain a restored layer of the first conductor filaments and the second conductor filaments pre-connected; installing a heating coil and a sealing device in a welding area of the restored layer, continuously introducing nitrogen into the sealing device through a vent of the sealing device to replace air in the sealing device, then starting the heating coil to pyrolyze and gasify the water-blocking material, and the water-blocking material is removed with the nitrogen; when there is no visible object in the exhaust port and the nitrogen concentration exceeds 99.9% within a preset time, the heating of the heating coil is stopped; when the temperature of the restored layer is below 100 DEG C, the introduction of nitrogen is stopped, and then welding, post-welding treatment and restoration of the remaining outer conductor filaments layer by layer are performed, so that welding pores, impurities and other defects are effectively avoided, and the strength and reliability of the welded joint are ensured.

The application relates to the technical field of submarine cable laying, and particularly discloses a buried plow into plow mouth submarine cable length measurement and control method and system. The submarine cable length measurement method and system adopts a dual-frequency sonar to perform sonar detection on the buried plow into the plow mouth to obtain a sonar image, adopts a turbid water camera to shoot the buried plow into the plow mouth to obtain a camera image, combines the specific size of the submarine cable, performs three-dimensional reconstruction on the sonar image and the camera image, displays a submarine cable three-dimensional graph, and can infer and identify the working state and the length of the submarine cable according to the graph. The submarine cable length control method and system can adjust the cable laying speed of a submarine cable ship in real time according to the real-time predicted submarine cable length of the buried plow into the plow mouth, can keep the length of the submarine cable into the plow mouth constant in the laying of the complex seabed environment, that is, can keep the tension of the submarine cable into the plow mouth constant in the laying of the complex seabed environment and further protect the submarine cable.

The utility model belongs to the field of submarine cable protection pipe, especially relates to a submarine cable pipeline steady flow protection pipe, including protection pipe body, the circumference of protection pipe body is provided with several steady flow fins extending along the length direction, steady flow fin is set out of the way, makes it convenient for embedding the sea bottom, the utility model provides a kind of submarine cable pipeline steady flow protection pipe, sets up steady flow fin, it is convenient for embedding the sea bottom, can increase the stability of whole, reduce the influence of receiving sea bottom turbulent flow;Protection pipe body is thermoplastic elastomer material protection pipe body moulding integrated, and unit arc body is movably connected between, unit arc body is set on submarine cable by being pried apart to two sides and being fixed through fixing piece, and installation can be completed, it is convenient to install.

The application relates to the technical field of submarine optical cable connection, and discloses an injection-molding top-pressing type submarine optical cable joint box, which comprises a cable rubber anti-bending device, one end of the cable rubber anti-bending device is fixedly connected with a metal anti-bending device adapter, one end of the cable rubber anti-bending device is fixedly installed with a metal anti-bending joint through the metal anti-bending device adapter, one end of the metal anti-bending joint is fixedly installed with an injection-molding cable joint insert, the inside of the injection-molding cable joint insert is fixedly provided with an injection-molding joint, the inner wall of the cable rubber anti-bending device is fixedly installed with a PU pipe body, and one end of the PU pipe body is sleeved with one end of the injection-molding joint. The injection-molding process is used to inject an injection-molding colloid to the connection interface, the colloid is filled and solidified in a No.1 annular groove, a No.2 annular groove and a thread groove of a submarine cable outer sheath, and a connection structure with mechanical interlocking and sealing integration is formed. Meanwhile, the anti-bending chain formed by the cable rubber anti-bending device and the metal anti-bending joint and the weight-reducing framework jointly improve the anti-bending capacity and the structural stability of the joint box.

The utility model belongs to the technical field of sea cable laying, specifically relates to a sea cable laying traction device, including the submarine cable float, the inside fixed connection of submarine cable float has the baffle, the space of submarine cable float inside is divided into equipment chamber and water pressure adjusting storehouse by baffle, is provided with water pressure storehouse adjusting mechanism, horizontal movement structure, electric clamp, battery and controller on submarine cable float, water pressure storehouse adjusting mechanism sets up in the inside of submarine cable float, horizontal movement structure installs in the outside of submarine cable float, electric clamp fixedly connected in the downside of submarine cable float, battery and controller all are fixedly connected in the inside of equipment chamber, and water pressure storehouse adjusting mechanism, horizontal movement structure, electric clamp and battery all are electrically connected with controller. The utility model is simple and effective in the process of sea cable laying control the position of sea cable in seawater.

This invention discloses a self-weight backfilling submarine cable protection device, comprising: an upper cover shell, a lower trough, a fixing base, and guide wings; the upper cover shell and the lower trough are detachably connected; the fixing base is disposed at both ends of the lower trough for limiting the submarine cable; the guide wings are symmetrically disposed on both sides of the lower trough and integrally formed with the lower trough; a backfilling trough is provided inside the lower trough, and the backfilling trough is placed between the fixing bases; this invention reduces the construction difficulty of the protection device and improves the convenience of underwater installation while ensuring structural stability; it optimizes and weakens the scouring effect of ocean currents on the seabed and the sediment around the cable; it achieves long-term stability of the backfilled sediment, preventing secondary scouring that could lead to cable exposure; and it meets strength requirements while improving the device's corrosion resistance and service life in the marine environment.

This application provides a dynamic and static submarine cable splicing device, comprising: a splice tube, the splice tube including a tube body and dynamic cable clamping tubes and static cable clamping tubes respectively disposed at both ends of the tube body; an adjusting tube, the adjusting tube being sleeved on the outer periphery of the tube body and extending outward from the dynamic cable clamping tube in a direction away from the static cable clamping tube, the adjusting tube being axially movable along the tube body, a first elastic element and a stop element being provided between the adjusting tube and the tube body, the first elastic element being used to apply an elastic force to the adjusting tube to move in a direction away from the static cable clamping tube, and the stop element being movably disposed to switch between a stop position and a clearance position, wherein when the adjusting tube is subjected to a force in the direction of the static cable clamping tube reaching a set value, the stop element switches to the clearance position. The dynamic and static submarine cable splicing device provided by this application can reduce the bending degree of the dynamic cable near the splicing device and improve the protective effect of the splicing device on the dynamic cable.

The present application relates to a kind of hard rock crossing of non-excavation directional drilling based on submarine cable landing construction method, belong to the technical field of optical cable layout, including the following steps: design from high to down and between vertical plane certain angle and the preset trajectory of through hard rock slope surface;Control directional drilling machine along the preset trajectory and drill guide hole;Control the drill rod of directional drilling machine along the preset trajectory and back drag, and finally form guide final hole by expanding the guide hole;Excavation anchoring well of construction operation and the cable trench being communicated with the anchoring well at suitable position, and install anchoring device inside anchoring well;Drag rope of armoured submarine cable is passed from guide final hole to shore.The present application avoids trenching on hard rock, reasonably reduces construction cost, avoids trestle erection on steep slope at the same time, reduces the landscape influence to rock shore reef, avoids the influence of scouring, corrosion to cable structure.

The utility model discloses a compact brancher suitable for the connection of submarine cable and detection device, comprising: two submarine cable end connector branches, a detection device connector branch and a brancher connector box, two submarine cable end connector branches are mainly used for connecting submarine cable and splicing with the brancher connector box, need to bear the breaking force of 90% of the breaking strength of submarine cable. A detection device connector branch is mainly used for connecting detection device and splicing with the brancher connector box, need to bear the breaking force of 90% of the breaking strength of detection device. The brancher connector box is mainly used for connecting submarine cable end connector and detection device connector, and completes optical fusion, fiber winding and optical device storage.

This invention provides a submarine cable clamp, a submarine cable structure, and a method for processing the submarine cable structure. The submarine cable clamp is used to clamp onto the armor layer of a submarine cable and includes: a clamping part having a cavity for the submarine cable and the armor layer to pass through; a filler body filling the cavity; a first reinforcing member passing through the filler body, with a first end for connecting to the armor layer and a second end extending within the filler body; and a second reinforcing member connected to the first reinforcing member and disposed within the filler body. The submarine cable clamp provided by this invention fixes the submarine cable and the armor layer by setting a filler body in the cavity of the clamping part, and connects the armor layer and the filler body by setting a first reinforcing member in the filler body, and sets a second reinforcing member on the first reinforcing member, thereby improving the ability of the first reinforcing member to withstand radial pressure, ensuring the connection effect of the filler body, the submarine cable, and the clamping part, significantly improving the anti-slip performance of the submarine cable clamp, and ensuring the reliability and stability of the overall structure.

The utility model relates to the technical field of submarine cable laying, disclose a kind of submarine cable laying angle precision adjusting device, including burying plough and movable box, the top of burying plough is equipped with adjusting assembly, the movable box is located at the top of the adjusting assembly, the inside of the movable box is equipped with clamping assembly, the bottom of burying plough is equipped with burying knife, the inside of burying knife is equipped with limit slot, the top of burying plough is equipped with wire inlet, the adjusting assembly includes motor, the motor is installed in the top of burying plough, the output of the motor is fixedly connected with pinion, the top of burying plough is rotatably connected with gear wheel. In the utility model, motor, pinion, gear wheel and rotating shaft cooperate, driving rotating shaft synchronous rotation, and then driving burying knife to realize accurate angle fine adjustment, can be quickly adapted to submarine complex terrain, avoid burying knife and submarine hard rock, rigid contact of reef.

This invention discloses a method for monitoring the insulation of the sheath of ultra-high voltage long-distance submarine cables, belonging to the field of submarine cable technology. It includes deploying a first intelligent sensor device at the power supply end of the submarine cable and a second intelligent sensor device at the power receiving end. Both ends are synchronously sampled via GPS, and the data is uploaded to the main control room. The main control room equipment calculates the instantaneous value I. cx I dx I gd I fz The fundamental peak value is extracted by discrete Fourier transform to obtain the leakage ratio k. dc and circulation coefficient k gf According to k dc The value of k determines the insulation leakage of the sheath. gf The deviation from the reference indicates an abnormal grounding circuit, solving the technical problem of accurately monitoring the insulation of ultra-high voltage long-distance submarine cables online even in environments with strong electromagnetic interference. This invention only requires a current signal, does not require voltage measurement, is unaffected by electromagnetic interference, and can realize real-time online monitoring of insulation aging and leakage of submarine cables.

This invention relates to the field of cable technology and discloses a 220KV submarine cable resistant to deep water pressure and its preparation method. The submarine cable is composed of a conductor, an insulation layer, a water-blocking tape, a sheath layer, a waterproof polypropylene tape inner lining layer, an armor layer, and a waterproof polypropylene tape outer sheath layer. This invention involves mixing polypropylene, polypropylene-modified silicone oil, and a lubricant, followed by extrusion, casting, stretching and orientation, and slitting. The resulting waterproof polypropylene tape exhibits good tensile strength, while significantly improving elongation at break and flexibility. The polypropylene-modified silicone oil contains strongly hydrophobic perfluoroalkyl chains and polysiloxane structures, which improves the water contact angle and surface hydrophobicity of the polypropylene tape, enhancing its waterproof performance. As the inner lining and outer sheath layer of the cable, it is beneficial for improving the cable's waterproof and water-resistant performance, and has good practical applications in submarine cables and other fields.

The invention discloses a submarine cable state remote wireless telemetering system and method based on LoRa, and belongs to the technical field of cable laying state monitoring, and the system comprises a plurality of state monitoring nodes arranged on a submarine cable, a relay node and a shipborne monitoring center. The analysis computer adaptively adopts different compensation strategies according to the monitored packet loss and missing proportion; during light packet loss, trend filling is executed by using the change rate of effective nodes and spatial correlation; during moderate packet loss, confidence weight dynamically attenuating along with interruption time is introduced into the reconstruction model; and during severe packet loss, extracting feature sub-blocks of the spatial physical association constraint matrix to execute order reduction calculation, and recovering data in combination with a spatial interpolation method. According to the method, the problem of data missing caused by unstable wireless communication under the extreme sea condition is solved through a hierarchical compensation mechanism, it is ensured that the state distribution of the whole submarine cable can be stably and accurately reconstructed and early warning can be output under the working conditions of different degrees of packet loss, and the robustness and construction safety of a submarine cable monitoring system are remarkably improved.