361results about "Submarine cables" patented technology

The invention provides a submarine cable with a large cross section and high heat dissipation performance. The submarine cable comprises an inner protection layer, a center assembly, a plurality of electric units, a plurality of power assemblies and a first heat dissipation assembly. An accommodating cavity is formed in the inner protective layer; the central component is positioned in the accommodating cavity; the plurality of electric units are located in the accommodating cavity, and the plurality of electric units are arranged around the central assembly; the multiple power assemblies are located in the containing cavity, the multiple power assemblies and the multiple electric units are correspondingly arranged, and the power assemblies are configured to enable the electric units to move towards or away from the inner protection layer; the first heat dissipation assembly is arranged around the periphery of the inner protection layer, and the first heat dissipation assembly is configured to dissipate heat of the electric units making contact with the inner protection layer through the inner protection layer.

The invention belongs to the technical field of submarine cables, and provides a high-voltage three-core submarine cable. Comprising a cable core, a waterproof layer, an inner sheath, an armor layer and an outer sheath, the cable core comprises at least one conductive core, the conductive core comprises a conductor and an insulation system arranged outside the conductor, the insulation system comprises a conductor shielding layer, an insulation layer and an insulation shielding layer, and the conductivity of the conductor shielding layer is gradually reduced from inside to outside in the radial direction of the conductive core; the conductivity of the insulation shielding layer is gradually reduced from outside to inside in the radial direction of the conductive core. The contact interface of the conductor shielding layer and the insulating layer prevents charge from gathering at the interface, and the electric field distribution between the conductor shielding layer and the insulating shielding layer is greatly optimized; similarly, the electric conductivity of the insulation shielding layer is set to be gradually increased in the direction away from the insulation layer, the interface electric field between the insulation layer and the insulation shielding layer is optimized, electric charges on the interface of the insulation layer can be rapidly led to the insulation shielding layer, and the partial discharge phenomenon is prevented.

The invention relates to the technical field of trailing cables, and discloses a high-tensile-strength lightweight deep sea trailing cable, which is characterized in that the outer side of a copper conductor is coated with an insulating layer, the periphery of an inner support piece is coated with a heat dissipation layer capable of uniformly transferring heat, the outer side of the heat dissipation layer is provided with a waterproof layer capable of blocking and preventing water, the waterproof layer is embedded in the inner side of a tensile inner layer, and the tensile inner layer is provided with a waterproof layer. According to the invention, the heat transfer and heat dissipation capability in the cable is effectively improved, the passive water blocking and active water stopping capability in the cable is enhanced, the tensile inner layer endows the cable with excellent tensile strength, and the pressing layer greatly improves the pressure resistance and compression resistance of the cable, so that the cable has the capability of stable operation in severe environments of high pressure and low temperature in deep sea, and the service life of the cable is prolonged. In addition, a light-weight fiber material is used for replacing a traditional metal material, the high tensile property is guaranteed, meanwhile, light weight of the cable is achieved, the dragging resistance is reduced, and the comprehensive use requirement for high tensile strength and light weight is met.

The invention discloses a 220kV submarine cable capable of preventing seawater corrosion, and relates to the technical field of cables, the outer side of an insulation isolation layer is provided with an outer protection support assembly, the outer side of the insulation isolation layer is wrapped with an armor layer, the outer side of an expansion layer is uniformly provided with mark grooves, the outer side of an insulation anti-corrosion layer is embedded with a spiral support ring, and a positioning ring is fixedly sleeved in a fixing groove. According to the cable, when the cable moves, the annular buffer net bulges and rolls, is more elastic and has better impact absorption capacity, the damage of the insulating anti-corrosion layer is further avoided, the expansion layer is further prevented from absorbing water and expanding, and the cable is prevented from being damaged. The damaged position is extruded, the speed of seawater permeating into the cable is reduced, the foam plastic strip and the driving ball diffuse and flow out along the damaged position, and the damaged area can be marked after the submarine cable is damaged, so that maintenance personnel can quickly determine the damaged position for repairing.

A photoelectric composite cable for an underwater buoy, and a preparation process therefor. A polyurethane, a self-repairing polyurethane prepolymer, and a composite nano zinc oxide are selected as an outer sheath base material. A modified polysiloxane having a B-O six-membered ring dynamic cross-linked network and a long-chain alkane group and an amino is introduced into the self-repairing polyurethane prepolymer; 5,5'-methylenedisalicylaldehyde and isophorone diisocyanate are together subjected to stepwise polymerization with the modified polysiloxane, and the 5,5'-methylenedisalicylaldehyde is cross-linked with diphenylmethane diisocyanate to obtain a self-repairing polyurethane prepolymer; and nano zinc oxide is subjected to a modification treatment, wherein dodecyltrimethoxysilane and 3-glycidoxypropyltrimethoxysilane are used for dual modification, such that super-hydrophobic nano zinc oxide having good thermal stability and high dispersity is prepared in a toluene system.

The utility model belongs to the technical field of cables, and particularly relates to a dynamic composite cable for deep sea operation of a diving robot. The cable comprises a central filling member, a composite cable core and a protective layer which are arranged from inside to outside. The composite cable core is arranged on the outer side of the center filling piece and comprises a plurality of power cable cores, auxiliary cable cores and winding wires which are sequentially arranged from inside to outside, the power cable cores are arranged around the center filling piece in the circumferential direction, and gaps between the power cable cores and the protective layer are filled with the auxiliary cable cores in the circumferential direction at intervals; gaps among the power cable core, the auxiliary cable core and the protective layer are filled with winding wires in the circumferential direction at intervals, and the outer side of the winding wires is coated with a semi-conductive layer; the protective layer comprises an armored shielding layer in contact with the semi-conductive layer and an outer sheath layer arranged on the outer side of the armored shielding layer. The utility model is used for solving the problem that the existing umbilical cable is poor in tensile and compression resistance.

Systems and methods are disclosed herein for identifying cable damage using machine vision, such as on a cable being fed down a wellbore from a cable spool in an oil and gas operation. An example method can include providing a camera directed toward a cable that is winding upon, or unwinding from. a cable spool. The method can also include capturing a plurality of frames of images of the cable by the camera. such as by capturing video. The captured frames can be cropped to remove portions of the frames that do not include the cable. The method can further include processing the cropped frames using a machine-learning model. The machine-learning model can be trained using images of known cable damage as inputs so it can identify new instances of damage. The machine-learning model can further classify each cropped frame as including damage or not including damage.

Method of manufacturing a power cable comprising three cores and three filler profiles arranged in a stranded configuration, the method comprising: A) in a design stage of the power cable: A0) defining a nominal outer diameter of the cores, and defining a stranding pitch P of the cores, A1) determining, in a transverse plane of the power cable, a shape of at least one of the cores, A2) determining a cross-sectional shape of the filler profiles in a transverse section of a filler profile based on the shape determined in step A1), B) in the production stage of the power cable: B1) manufacturing each of the cores with the nominal outer diameter, B2) obtaining the filler profiles with the cross-sectional shape obtained in step A2), and B3) stranding the cores and the filler profiles with the stranding pitch P in an assembly machine.

The invention relates to the technical field of communication cables, and discloses a water-blocking flame-retardant underwater communication cable with a self-repairing function, which comprises an insulating layer, a conductor layer is arranged in the insulating layer, an optical fiber layer is arranged in the conductor layer, a spiral groove is formed in the outer wall of the insulating layer, and a Bragg grating is wound in the spiral groove. A shielding layer is arranged outside the insulating layer, a radial waterproof layer is arranged outside the shielding layer, and an inner sheath is arranged outside the radial waterproof layer; parts providing communication, power supply and sensing monitoring functions share one set of shielding layer, radial waterproof layer and composite armor layer, so that the complexity of underwater deployment of the cable is reduced; the formed air cavity is used for providing space for heating expansion of the cable, meanwhile, airflow moving in the air cavity can conduct local heat exchange with the conductor layer, and local overheating of the cable is avoided; the composite armor layer with a double-layer structure can prevent the braided belt from deviating and being unable to reset due to excessive local stretching, and the service life of the cable is prolonged.

The invention relates to the technical field of composite armored cables, and discloses an intelligent sensing type photoelectric composite armored cable for deep-sea mining equipment, which comprises a cable core formed by twisting a plurality of power cable core conductors, an optical fiber communication unit, a medium conveying pipeline and an intelligent sensing unit, and an outer coating layer, tin-plated annealed copper wires and high-strength copper foil wires are arranged in a conductor of the power cable core, an insulation shielding layer is wrapped outside the conductor, the intelligent sensing unit integrates a plurality of optical fibers and optical fiber grating sensors, a loose structure is arranged outside the intelligent sensing unit, one intelligent sensing unit is used for monitoring strain distribution, the other intelligent sensing unit is used for monitoring temperature distribution, and other redundant optical fibers are used as redundant backups. A certain length of grid region interval is preset, distributed measurement along the length of the cable is realized, a sensing optical fiber in the intelligent sensing unit is connected to an optical fiber demodulator of a deck control room, a software system displays strain, temperature, vibration and form data of each point of the cable in real time, an alarm threshold value is set, and the structure is highly integrated and can adapt to a deepwater environment.

The invention belongs to the technical field of cable preparation methods, and provides a preparation method of an offshore photovoltaic cable and the cable, and the preparation method comprises the steps: S1, carrying out the wire drawing and annealing of a high-purity copper rod, and then carrying out the stranding, thereby forming a stranded flexible conductor; s2, extruding a cross-linked polyethylene material on the surface of the stranded flexible conductor, and forming an extruded insulating layer after cross-linking; s3, twisting a plurality of insulated wire cores rightwards, filling a polypropylene rope and wrapping a high-strength non-woven fabric; s4, extruding a chloroprene rubber material outside the high-strength non-woven fabric, and forming an extruded inner sheath after vulcanization; s5, weaving a special-shaped copper and steel wire mixed armor layer outside the inner sheath; and S6, extruding a polymer material containing an antifouling agent outside the armor layer. Compared with the prior art, according to the cable production method in the scheme, from flexible conductor twisting to outer sheath layer extruding, each layer is optimally designed for specific challenges of the marine environment, the specific challenges include the twisting mode, the twisting pitch, tension control and the like, and laying in the complex marine environment is facilitated.

The utility model discloses a polyurethane watertight photoelectric composite cable, and relates to the technical field of watertight photoelectric composite cables. The composite cable comprises the outer sheath, the inner sheath, the optical fiber unit and the power line, the inner sheath is arranged in the outer sheath, the overall use strength of the composite cable is improved through the outer sheath and the inner sheath, and the armor layer is arranged between the outer sheath and the inner sheath, so that even if the outer sheath is broken, the optical fiber unit can be prevented from being damaged, and the service life of the composite cable is prolonged. The inner sheath is protected through the armor layer, the first water-blocking tape is made of a material formed by compounding polyester fibers and a high-water-absorption material after meeting water, and when water enters a cable port using the water-blocking tape, high-water-absorption powder or a water-swelling material contained in the water-blocking tape can absorb the water through the water absorption performance of the high-water-absorption powder or the water-swelling material. And the water-blocking tape expands to become gel to form a protective barrier for preventing water from flowing, namely, the protective barrier performs waterproof protection between the broken part of the outer sheath and the armor layer.

The invention relates to a power transmission flexible bus which has three waterproof layers from inside to outside through the arrangement of a metal protection layer, a first waterproof layer and a second waterproof layer, ensures the electrical insulation, and also has the waterproof effect through the arrangement of a mechanical protection layer. Stable and reliable protection is formed on the surface of a product, which is directly exposed to seawater, and the mechanical strength is improved; therefore, the waterproof and compressive properties of the product in the deep sea environment are remarkably improved, the use safety of the product is effectively improved, and the service life of the product is effectively prolonged. Meanwhile, through the arrangement of the first lining layer and the second lining layer, stable and reliable supporting and buffering are formed for the metal protection layer and the mechanical protection layer, the metal protection layer is prevented from damaging the insulating layer, the mechanical protection layer is also prevented from damaging the second waterproof layer and the metal protection layer, and the durability of each layer of the product is further ensured; mutual damage between different layers is avoided, and the function integrity of the function of each layer in the preset use period is guaranteed.

The present invention relates to the field of offshore wind power technology, and provides a submarine cable comprising: a central pipe, a first electrical unit, a second electrical unit, and a third electrical unit; the central pipe is used to be filled with a cooling medium; the first electrical unit is coated on the outside of the central pipe, the first electrical unit includes a first phase conductor layer, the first phase conductor layer includes a plurality of first phase conductors; the second electrical unit is coated on the outside of the first electrical unit, the second electrical unit includes a second phase conductor layer, the second phase conductor layer includes a plurality of second phase conductors; the third electrical unit is coated on the outside of the second electrical unit, the third electrical unit includes a third phase conductor layer, the third phase conductor layer includes a plurality of third phase conductors, and the first phase conductor, the second phase conductor, and the third phase conductor are spirally wound. The above-mentioned submarine cable reduces the influence of the skin effect, reduces the resistance of the conductor, improves the current carrying capacity, and realizes the use of a smaller conductor cross-section to meet the demand for a larger transmission capacity.

The invention relates to the field of ocean engineering equipment, in particular to an anti-turbulent-flow umbilical cable and a preparation method thereof.Multiple sets of shield scale anti-drag structure units are formed on the outer peripheral face of an umbilical cable body and are regularly arranged along the outer peripheral face of the umbilical cable body; a fish scale bionic structure or a fin-shaped bionic structure is formed to cope with a turbulent flow environment in water, the fluid resistance in the turbulent flow environment is effectively reduced, the impact of hydrodynamic disturbance on the umbilical cable body in a dragging or static state is reduced, and the problems of shaking, vibration and deformation caused by large hydrodynamic disturbance are avoided. The umbilical cable is round in appearance and uniform and consistent in outer diameter, the problem that in the prior art, protruding parts of flow deflectors and woven capillary fibers are prone to clamping stagnation or winding or abrasion in the winch cable arrangement process is solved, efficient and smooth winch cable arrangement operation is achieved, the equipment operation complexity and maintenance frequency are reduced, and the working efficiency is improved. And the stability and the service life of the umbilical cable in long-term operation are greatly improved.

There is disclosed a power cable (11) for use in a subsea power umbilical (2,7), said power cable (11) comprising from inside to outside a central conductor (20), an electrical insulation layer (23), a metallic screen (28) and an external polymeric sheath (29), said central conductor (20) or said metallic screen (20) comprising at least one conductive wire (21, 26, 30), wherein said at least one conductive wire (21, 26, 30) comprises a metal core (31) coated with a copper cladding (32). Also disclosed is a subsea power cable comprising such a power cable, and a method of increasing the slippage of conductive wires (21,26,30) of a metallic screen (28) during bending of a power cable (11 ) for use in a subsea power umbilical (2,7), said power cable (11 ) comprising from inside to outside a central conductor (20), an electrical insulation layer (23), the metallic screen (28) and an external polymeric sheath (29), wherein the method comprises at least the step of increasing the tensile modulus of the conductive wires (21, 26, 30).

The utility model provides an audio and video electric power distribution comprehensive cotton covered wire for radio and television, which comprises an outer sheath, a cross-linked silicone rubber sheath is sleeved in the outer sheath, and an air cooling pipe, an audio wire harness, a video wire core and an electric power distribution wire core are wrapped in the cross-linked silicone rubber sheath. The audio and video power distribution integrated cotton covered wire for radio and television is applied to digital communication of civil radio and television, aerospace, offshore platforms and warships and modern information communication of data link operation, and can provide a working power supply for electrical equipment while transmitting audio signals and video signals. And reliable communication can be provided for users of high-flow high-definition high-frequency band special equipment in an extreme temperature environment.

The invention provides a three-core submarine cable metal sheath induced voltage elimination method, which comprises the following steps: acquiring a first induced voltage threshold value of a submarine cable sea area section, and acquiring a second induced voltage threshold value of a submarine cable land section; according to a submarine cable metal sleeve distributed induced voltage calculation model, calculating a first segment length of the submarine cable generating a first induced voltage threshold under a wet condition; according to a submarine cable metal sleeve distributed induced voltage calculation model, calculating a second segment length of the submarine cable generating a second induced voltage threshold under a dry state condition; and performing mutual short-circuit processing on the three-phase metal sleeve of the submarine cable with the first segment length or the second segment length. The three-phase metal sleeves of the submarine cable are subjected to mutual short-circuit treatment, so that the problem that the PE semi-conductive layer is overheated and melted due to temperature rise caused by rise of induced voltage of the three-phase metal sleeves can be prevented.

The application relates to the technical field of submarine cables, and discloses a cross-linked polyethylene insulated submarine cable, which comprises a polyethylene sheath, the inner wall of the polyethylene sheath is fixedly connected with an insulation layer, the inner wall of the insulation layer is fixedly connected with a conductor, the outer side of the polyethylene sheath is provided with a shell, the shell is used for butt joint and protection of the connecting part of two cable sections, the two side inner surfaces of the shell are fixedly connected with inner clamping rings, the inner clamping rings are used for supporting the cable, the circumferential surface of the polyethylene sheath is fixedly connected with an annular clamping seat, the annular clamping seat is used for mounting the cable, in the application, the annular clamping seat is clamped with a limiting groove and a positioning block, the cable is positioned, the cable is prevented from being twisted to affect butt joint of the cable in the connecting process, the trapezoidal blocks are moved downwards and inserted into trapezoidal grooves, the annular clamping seat is locked, the annular clamping seat and one end of the cable are prevented from being telescopic and deviated in the shell, and the butt joint stability of the cable is improved.

The present invention relates to a power cable comprising a cable core comprising an electrical conductor and an electrically insulating layer surrounding the electrical conductor, and a water barrier sheath surrounding the cable core, wherein the water barrier sheath comprises a metal layer, wherein the metal layer comprises a metal alloy comprising zinc, or a zinc alloy.

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 present application relates to the technical field of ship cable, in particular to a kind of bending-resistant ship cable and its tensionable contraction frame, including mandrel, the outside of mandrel is provided with outer sheath, contraction frame is made of left and right two support frames, the bottom of two support frames is fixedly installed with base, two bases are fixedly installed with front and rear two bottom plates, the side surface center position of one support frame is fixedly installed with servo motor, the output shaft end of servo motor is fixedly installed with ring around shaft, the front end plate body between two support frames is fixedly installed with rotating shaft, top plate is provided with tensioning assembly, tensioning assembly includes first cylinder fixedly installed on top plate, the telescopic shaft end of first cylinder is provided with U-shaped frame, U-shaped frame is rotatably connected with guide roller between left and right two side plate bodies, one support frame is provided with reciprocating assembly.The present application has bending-resistant characteristics, and can contract and wind cable simultaneously.

The invention relates to a stealth underwater detection optical cable and a manufacturing method, the stealth underwater detection optical cable comprises a cable core, the periphery of the cable core is provided with a protective sleeve, the protective sleeve comprises a protective inner ring and a deformation layer which are of an integrated structure, the deformation layer is composed of deformation protruding strips which are annularly and uniformly distributed, and the deformation protruding strips are spirally arranged on the periphery of the protective inner ring; the radial section shape of the deformation protruding strip changes continuously. The periphery of the protective sleeve is of a structure that deformation protruding strips which are arranged in an SZ spiral mode are provided with different reflecting surfaces at different positions. If a stealth coating is coated on the outer surface of the deformation protruding strip of the protective sleeve, reflecting surfaces of electromagnetic waves and vibration shock waves with better effects in different directions and areas are formed, and the electromagnetic waves and the vibration shock waves of the detection cable are directionally emitted by a competitor to be dispersed and echo through the reflecting surfaces of the stealth coating on the two sides of the deformation protruding strip. The intensity of reflection echoes of the detection cable is greatly reduced, that is, the effective reflection area of the cable is greatly reduced.

A dynamic high-voltage submarine cable comprises at least one cable core comprising an electrical conductor and an electrically insulating layer (4) radially surrounding outside of the electrical conductor (3), and a water barrier radially surrounding outside of the cable core (2). The water barrier comprises a corrugated metal tube (10) having an inner diameter (20) larger than 90mm and a corrugation pitch (p) in a range of 4 - 12 mm, characterized in that the metal tube has a wall thickness (T) in a range of 0.1 - 1,2 mm and a corrugation depth (d) of more than 5 mm.

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 utility model discloses a shielding type underwater cable in the technical field of cables, which comprises a cable body, a plurality of fixing assemblies are uniformly arranged on the outer wall of the cable body, the cable body comprises a pressure-resistant protective layer, the outer wall of the pressure-resistant protective layer is coated with a corrosion-resistant coating, and the inner wall of the pressure-resistant protective layer is provided with a protective filling layer. Through the arrangement of the compression-resistant protection layer and the strength supporting columns uniformly arranged between the compression-resistant protection layer and the protection filling layer, the overall compression-resistant performance of the cable is remarkably enhanced, and the cable can better cope with the challenge of an underwater high-water-pressure environment. And the outer wall of the compression-resistant protection layer is coated with the corrosion-resistant coating, so that direct contact between the cable and underwater corrosive substances is effectively isolated, and the service life of the cable is prolonged. And the flexible gap filling layer is filled between the compression-resistant protection layer and the protection filling layer, and the cable core is subjected to multi-layer protection through the shielding layer and the insulation protection sleeve, so that the stability and the safety in the cable are improved.

The invention relates to a photoelectric composite longitudinal watertight cable and a preparation method thereof. The cable sequentially comprises a conductor unit, an insulating layer, a water-blocking tensile element, an aluminum foil shielding layer and a double-layer co-extrusion sheath from inside to outside, wherein the conductor unit is formed by twisting silver-plated copper wires; the insulating layer is made of high-strength ethylene propylene diene monomer; the water-blocking tensile element is made of a tensile material and is of a net-shaped structure; the aluminum foil shielding layer is made of aluminum foil with the thickness of 0.02-0.05 mm; the inner layer of the double-layer co-extrusion sheath is ethylene propylene rubber, and the outer layer is chloroprene rubber. Through structural innovation and process optimization, the technical bottleneck that an existing underwater cable cannot give consideration to multi-signal composite transmission, deepwater pressure resistance, high interference resistance and long-term reliability at the same time is solved. The cable adopts a silver-plated conductor, high-strength insulation, precise shielding and a double-layer co-extrusion sheath, and can be used in full sea depth by cooperating with initiative processes such as water vapor balance vulcanization.

The hydrolysis corrosion-resistant underwater cable comprises a connecting sleeve, cable bodies are arranged on the two sides of the connecting sleeve, connecting grooves are formed in the outer walls of the opposite faces of the two cable bodies, matching grooves are formed in the inner walls of the two ends of the connecting sleeve, and sealing grooves are formed in the bottoms of the matching grooves. Opposite surfaces of the cable bodies are provided with sealing rings matched with the sealing grooves, the opposite surfaces of the cable bodies are matched with the connecting grooves relative to the matching grooves, a positioning mechanism for positioning connection of the matching grooves and the connecting grooves is arranged between the matching grooves and the connecting grooves, and a fixing mechanism for fixing the two cable bodies is arranged outside the connecting sleeve. According to the utility model, the annular shape formed by the plurality of arc-shaped plates and the penetrating plate is gradually reduced, so that the plurality of arc-shaped plates and the penetrating plate enter the positioning groove, thereby realizing quick connection of two cable bodies, and bringing certain convenience for people to connect the cable bodies.

The application discloses a zero-gravity cable and system for underwater equipment recovery, the zero-gravity cable comprising a cable, one end of the zero-gravity cable being used for connecting a docking robot, the other end of the zero-gravity cable being used for connecting a parent body, the docking robot being used for capturing the underwater equipment, so as to realize recovery of the underwater equipment; the cable is used for supplying power to the docking robot; the zero-gravity cable further comprises a buoyancy structure, the buoyancy structure comprising an air-filled cavity, the buoyancy structure being used for making the zero-gravity cable in a zero-gravity state when the zero-gravity cable is in water, the zero-gravity cable being subjected to buoyancy equal to gravity, so as to avoid the influence of gravity while realizing power supply to the docking robot, reduce the load of the docking robot, and ensure underwater equipment recovery.

The utility model discloses a 35kV power cable for offshore wind power generation, which comprises a conductor, a semi-conductive water-blocking wrapping tape is wrapped outside the conductor, a three-layer co-extrusion insulating layer is extruded outside the semi-conductive water-blocking wrapping tape, a semi-conductive water-blocking tape is overlapped and wrapped outside the three-layer co-extrusion insulating layer, and the semi-conductive water-blocking tape is wrapped outside the three-layer co-extrusion insulating layer. An alloy lead inner sheath and a polyethylene inner sheath are sequentially extruded outside the semi-conductive water-blocking tape to form wire cores, the wire cores are twisted to form a cable core, a water-blocking tape is lapped outside the cable core to tighten the cable core, a polypropylene fiber layer is lapped outside the water-blocking tape, an alloy lead outer sheath and a polyethylene inner cushion layer are extruded outside the polypropylene fiber layer, and the polyethylene inner cushion layer is extruded outside the alloy lead outer sheath and the polyethylene inner cushion layer. A galvanized steel wire armor layer is wound outside the polyethylene inner cushion layer, and an outer sheath is wrapped on the outermost layer. The cable provided by the utility model has excellent performances of corrosion resistance, tension resistance, pressure resistance, water resistance, water resistance and the like, and is mainly used in the fields of offshore wind power, offshore oil and gas exploitation, power transmission between land and islands and the like.