381results about "Power cables including optical transmission elements" patented technology

A hybrid cable includes at least two bonded pairs of electrical conductors, such as four bonded pairs. The bonded pairs may be stranded about a central member and may also be bonded to each other. In one embodiment, the central member is a GRP rod, and one or two buffer tubes, each containing optical fibers, are stranded along with the bonded pairs about the GRP rod. In another embodiment, the central member is a tube and plural optical fibers are contained within the tube. Each bonded pair of electrical conductors carry digital or class 4 power from a transmitter card to a respective receiver card. Each bonded pair has unique indicia to facilitate the correct connections between the transmitter and receiver cards, such as tactile physical features on an outer surface of one of the electrical conductors of each bonded pair.

A corrugated copper submarine cable and a submarine cable production device. The submarine cable production device comprises a worktable, and further comprises: a fixing compartment arranged in the middle of the upper surface of the worktable, wherein a fixing pipe penetrates the interior of the fixing compartment, a winding assembly is arranged on the circumferential surface of one end of the fixing pipe, and the winding assembly comprises a rotating ring rotatably arranged on the circumferential surface of the fixing pipe; and a welding compartment arranged on one side of the fixing compartment, wherein two support frames are arranged in the welding compartment, the top ends of the two support frames are both fixedly connected to limiting rings, a positioning ring is rotatably arranged between the two limiting rings, the inner wall of the positioning ring is fixedly connected to a plurality of arc welding heads, and the plurality of arc welding heads are distributed in a circumferential array along the inner wall of the positioning ring. By providing a welding assembly, the present invention solves the problem of reduced production efficiency of corrugated copper submarine cables caused by a relatively slow welding speed and low efficiency during normal welding in which welding is performed by a large number of technicians to generate corrugated textures.

Provided in the present application are a multi-core submarine cable and a manufacturing device therefor. The multi-core submarine cable comprises: power cables, the power cables each comprising electric units for electric conduction and an optical unit for communication; buffering and heat insulation structural units, wherein the buffering and heat insulation structural units each comprise a braided rope and a first protective sleeve, the first protective sleeve being extruded on the outer side of the braided rope; and auxiliary metal units, wherein the auxiliary metal units each comprise a metal pipe and a second protective sleeve, the second protective sleeve being extruded on the outer side of the metal pipe; the cross sections of the power cables and the buffering and heat insulation structural units are all circular; the diameters of the cross sections of the power cables are equal to the diameters of the cross sections of the buffering and heat insulation structural units; and the buffering and heat insulation structural units, the auxiliary metal units and at least two of the power cables are stranded to form cable cores of the multi-core submarine cable. The present application can improve the stability and reliability of the submarine cable and reduce the production cost of the submarine cable.

A submarine cable for ultra-deep water. The submarine cable comprises: a plurality of cable cores, a plurality of pre-formed filler strips and an outer protective structure, wherein the plurality of cable cores are tightly twisted together; the plurality of pre-formed filler strips are arranged in gaps between the plurality of cable cores; the outer protective structure is wrapped around the peripheries of the plurality of cable cores and the plurality of pre-formed filler strips. Each pre-formed filler strip is provided with a cavity, which extends in the direction of length of the pre-formed filler strip, and through holes, which are arranged at intervals in the direction of length of the pre-formed filler strip and penetrate into the cavity in a radial direction; and the outer protective structure is provided with flow holes. When a submarine cable for ultra-deep water is laid and placed into a deep sea, seawater can enter gaps between a plurality of cable cores and cavities of pre-formed filler strips by means of flow holes, which allows the air inside the submarine cable to be completely discharged, so that the pressure inside and outside the submarine cable keeps balanced, thereby avoiding an internal structure of the submarine cable being crushed, and thus prolonging the service life of the submarine cable.

The invention discloses an intelligent sensing flame-retardant green environment-friendly power cable, and relates to the technical field of cables, the intelligent sensing flame-retardant green environment-friendly power cable comprises an inner sheath, the inner sheath is filled with three conductors, the outer side of the inner sheath is provided with an assembly flame-retardant and heat dissipation mechanism, and the assembly flame-retardant and heat dissipation mechanism comprises a flame-retardant plate. According to the invention, the structure is scientific and reasonable, the use is safe and convenient, a splicing flame-retardant and heat dissipation mechanism is arranged, the flame-retardant plates can be conveniently combined and connected to the outer side of the inner sheath in a sleeving manner through the splicing plates, the flame-retardant plates can be conveniently combined and connected to the outer side of the inner sheath in a sleeving manner through the splicing plates, and the flame-retardant plates can be conveniently combined and connected to the outer side of the inner sheath through the splicing plates. Inserting barrels are conveniently embedded into positioning holes through attaching plates, convex rods are embedded into the inserting barrels, clamping rings are embedded into clamping grooves, the positions of the inserting barrels and the convex rods are fixed, the attaching plates are forced to be tightly attached to the outer sides of the flame-retardant plates, then the attaching plates are matched with the splicing plates, the flame-retardant plates are positioned, and the splicing tightness of the flame-retardant plates is improved.

The invention discloses a photoelectric composite aluminum alloy conductor aerospace cable and a preparation method, and belongs to the technical field of photoelectric composite cables, the cable comprises an optical fiber unit, a conductor unit, an insulating layer, an anti-electromagnetic unit and a sheath layer; the anti-electromagnetic unit is obtained by weaving double-layer metallized polyimide fibers; the double-layer metallized polyimide fiber sequentially comprises a polyimide fiber, a first metal coating and a second metal coating from inside to outside. The surface of the polyimide fiber is coated with modified polydopamine; the first metal coating is copper; and the second metal coating is silver and / or nickel. The double-layer metal coating can form a more compact metal outer layer on the surface of the polyimide fiber, the requirements of the severe external environment of aerospace are met, a conductive network with higher stability is formed, and the electromagnetic shielding effect is remarkably improved. Moreover, the polyimide fiber is coated with a polydopamine coating, so that the fiber is not damaged, and the overall high and low temperature resistance and radiation resistance can be improved.

The invention discloses a waterproof and corrosion-resistant photoelectric composite cable, and belongs to the technical field of communication cables. The waterproof and corrosion-resistant photoelectric composite cable comprises a cable core composed of an optical unit and an electric unit, aramid yarn, an inner protective layer, a waterproof layer, an anti-corrosion layer and an outer sheath, the optical unit comprises an optical fiber and a protective sleeve outside the optical fiber, and the electric unit comprises a conductor and an insulating layer outside the conductor; the aramid yarn and the cable core are twisted in a spiral mode and wrapped by an inner protection layer in an extruded mode, the inner protection layer is wrapped by a water blocking layer, the water blocking layer is wrapped by an anti-corrosion layer, and the anti-corrosion layer is wrapped by an outer sheath. The inner protective layer is made of a waterproof high-temperature-resistant insulating polyurethane composite material; the outer sheath is made of a flame-retardant corrosion-resistant PUR composite material; the waterproof and corrosion-resistant photoelectric composite cable is simple in structure, has high strength and high toughness, has excellent waterproofness, corrosion resistance, aging resistance, high temperature resistance, wear resistance and flame retardance, and still keeps better use performance and longer service life in harsh environments such as underwater or underground.

Disclosed is a non-steel high strength data transmission cable having a strength member (5) and a core (1). The high strength data transmission cable includes a length of a core-cable (10), the length of core-cable (10) includes core (1) plus at least one fiber-optic conductor (2) that is:(i) disposed in a helical shape; and(ii) completely encased in a solid, flexible material.Also disclosed is a process for making a high strength data transmission cable. The high strength data transmission cable is capable of being wound on a winch under tensions and surging shocks experienced by a fishing trawler, and provides high quality data signal transmission and resolution so as to permit use for transmitting data during fish trawl operation from high-resolution sonars used to monitor fish caught.

A photoelectric composite flexible high-voltage reel cable, including a polyethylene outer sheath (1), a double-face plastic-coated steel belt (2) connected to an inner side of the polyethylene outer sheath (1), an insulating tape (3) connected to an inner side of the double-face plastic-coated steel belt (2), an anti-crack protective sleeve (4) connected to an inner side of the insulating tape (3), and a power cord body (6), a filler rope (7), a reinforcement (9) and an optical fiber body (8) sequentially distributed on an inner side of the anti-crack protective sleeve (4) from top to bottom, where the power cord body (6), the filler rope (7) and the optical fiber body (8) are distributed on a peripheral side of the reinforcement (9). The photoelectric composite flexible high-voltage reel cable further includes a metal radiating column (11), movable balls (13), a rubber air bag (14), and a conveying pipe (15).

The invention relates to the technical field of aluminum pipe extrusion, in particular to extrusion molding equipment for an aluminum-coated optical fiber composite overhead ground wire and an outer-layer aluminum pipe of the aluminum-coated optical fiber composite overhead ground wire, and the extrusion molding equipment comprises symmetrically arranged processing frames, a supporting rod and a fixed mold are fixed between the processing frames, a heating pipe communicated with the fixed mold is fixed on the supporting rod, and a piston cylinder is also fixed on each processing frame; the raw material transferring mechanism is arranged on the machining frame, a clamping assembly is arranged on the raw material transferring mechanism, a plurality of clamping plates which are circumferentially distributed at equal intervals are connected to the clamping assembly, and inclined plates are fixed to the clamping plates; the extrusion assembly is arranged on the supporting rod and used for pushing the raw materials between the clamping plates into the heating pipe; and the pumping mechanism is arranged on the piston cylinder and connected with the raw material transferring mechanism, a spray head is connected to the pumping mechanism, a follow-up translation assembly is arranged on the pumping mechanism, and the surface of the raw material can be coated with a lubricating agent before the raw material is pushed into the heating pipe, so that the raw material is prevented from being adhered to the inner wall of the heating pipe in the extrusion process.

The invention discloses a protective photovoltaic cable, relates to the technical field of photovoltaic cables, and aims to provide a protective photovoltaic cable capable of reflecting light and preventing ultraviolet rays from damaging the cable. The protective photovoltaic cable is technically characterized by comprising a battery cell assembly, and a heat insulation assembly is arranged on the outer side of the battery cell assembly; a binding assembly for fixing the position of the heat insulation assembly is arranged on the outer side of the heat insulation assembly, the outer side of the binding assembly is wrapped with an outer polyethylene protection layer, and a reflection assembly is arranged on the outer side of the outer polyethylene protection layer. The technical effects are that infrared rays and ultraviolet rays in illumination can be efficiently reflected through the reflection assembly and the aluminum foil reflection layer, the problem that the ultraviolet rays irradiate on the cable to cause accelerated aging of the cable is avoided, and the infrared rays are reflected to greatly block heat from being transmitted to the cable, so that aging of the cable due to the influence of the ultraviolet rays is prevented; and the problem of temperature rise due to the influence of infrared rays is solved.

The invention provides a photoelectric connector applied to a vehicle, an assembling method of the photoelectric connector and an active cable. The photoelectric connector comprises a shell; the photoelectric conversion module is arranged in the accommodating cavity of the shell; the electric connecting piece is partially arranged in the accommodating cavity of the shell and is connected with the photoelectric conversion module; the optical connecting piece is partially arranged in the accommodating cavity of the shell and is connected with the photoelectric conversion module; and the cured pouring sealant is filled in the accommodating cavity of the shell and covers the parts of the photoelectric conversion module, the electric connecting piece and the optical connecting piece in the accommodating cavity of the shell. The photoelectric connector can ensure that an active cable can be applied to an automatic driving vehicle, and low-delay, large-bandwidth and high-reliability video data transmission between a camera and a vehicle electronic system is realized.

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 invention discloses a multifunctional medium-voltage cable for power transmission, and relates to the technical field of cables, the outer side end of a transmission wire core is sleeved with an inner special-shaped insulation sleeve, a plurality of power connection processing strips are embedded into the outer side end of the inner special-shaped insulation sleeve at equal intervals, and the outer side ends of the inner special-shaped insulation sleeve and the power connection processing strips are sleeved with a central insulation sleeve; according to the invention, the external staggered heat insulation strips are utilized to reduce the influence of the external environment on the interior of the cable, and at the same time, the stable heat dissipation of the interior of the cable is ensured, so that the service life of the cable is prolonged, and the service life of the cable is prolonged. Therefore, when the cable runs, the situation that the internal temperature change is too large or too high due to the fact that the heat conduction part cannot be automatically adjusted can be avoided, the situation that the insulation part of the cable is accelerated to age due to continuous thermal expansion and cold contraction or excessive heating is reduced, the running stability of the cable is improved, and the service life of the cable is prolonged.

The invention relates to a photoelectric composite cable suitable for an unmanned aerial vehicle platform, which comprises a wrapping layer formed by wrapping a covering film, an accommodating space is formed in the wrapping layer, a two-core electric unit and a one-core single-mode optical fiber are respectively placed in the accommodating space, and a plurality of aramid fibers are distributed in the accommodating space and are filled to form a cable; an insulating layer is distributed on the electric unit, an outer wrapping layer is distributed on the single-mode optical fiber, and the insulating layer, the outer wrapping layer and the covering film are all made of high-temperature-resistant fluoroplastic formed by ethylene-tetrafluoroethylene copolymer; the thickness of the covering film is 0.05 mm, and the total thickness after wrapping is 0.10 mm + / -0.02 mm; the outer diameter of the photoelectric composite cable is 2.2 mm + / -0.1 mm, and the total weight per meter is smaller than or equal to 12 g. Therefore, the whole photoelectric composite cable has better high temperature resistance, can meet high tensile strength under the condition of light weight, can realize low-loss signal transmission, and has better heat dissipation effect.

The invention discloses a high-flexibility multifunctional cable and a manufacturing process and application thereof, and relates to the technical field of communication cables.The high-flexibility multifunctional cable comprises at least one conductor unit, and each conductor unit comprises a conductive wire core formed by twisting a plurality of metal conductors and a first inner insulating layer wrapping the exterior of the conductive wire core; the functional unit and the conductor unit are arranged in a bundling mode, the functional unit comprises a functional core body, a second inner insulating layer and a lapped inner shielding layer, the functional core body is wrapped with the second inner insulating layer, and after the conductor unit and the functional unit are combined, the conductor unit and the functional unit are sequentially wrapped with an outer shielding layer, a buffer layer, an armor layer and an outer sleeve layer from inside to outside. According to the invention, application scenes in main connecting pieces such as electric power communication composite power supply / transmission umbilical cords, aerospace cabin-out system umbilical cords, industrial robot automatic mechanical arms and the like can be met.

The invention relates to a high-flame-retardant zero-dripping low-smoke halogen-free photoelectric composite cable for ships and maritime work platforms. The high-flame-retardant zero-dripping low-smoke halogen-free photoelectric composite cable sequentially comprises an electric unit, at least one optical fiber unit, an inner protective layer, an armor layer and an outer protective layer from inside to outside. The outer surface of the electric unit, the outer surface of the optical fiber unit, the inner protective layer and the outer protective layer are all prepared from a flame-retardant sheath material; the flame-retardant sheath material comprises the following components in percentage by mass: 15-35% of EVA (Ethylene Vinyl Acetate); 1%-10% of EPD M; 1% to 10% of LDPE; 1% to 10% of HDPE; 1%-10% of a compatilizer; 0.1%-0.5% of an antioxidant; 20%-50% of an inorganic flame retardant; 5%-10% of a charring agent; the charring agent is prepared by mixing montmorillonite, red phosphorus and melamine cyanurate according to a ratio of 2: 1: 1. The photoelectric composite cable designed by the invention has the characteristics of high flame retardance, low smoke and zero dripping during combustion, no halogen, UV resistance, hydrolysis resistance and the like.

The invention relates to the technical field of submarine cables, in particular to a high-performance wet-type dynamic submarine cable which comprises a conductor, and a filling strip, a cabling wrapping tape, an inner sheath, an armor and an outer sheath are sequentially arranged on the outer side of the conductor from inside to outside. According to the high-performance wet-type dynamic submarine cable, the compressed circular copper oxide water-blocking conductor is adopted, the insulating layer is arranged on the surface of the copper conductor, the skin effect of the conductor is reduced, and the current-carrying capacity can be improved; the armoring is a double-layer reverse armoring, an inner layer bonding and outer layer non-bonding structure is adopted, through reverse twisting, torsion generated in the twisting process of the cable is effectively counteracted, so that the knotting and fracture risks caused by torsion in the laying and using processes of the cable are remarkably reduced, the anti-pressure capability and the dynamic flexibility are balanced through the layered design, and the service life of the cable is prolonged. The sliding frequency and the abrasion risk of outer-layer steel wires are reduced.

The invention relates to a cable structure and a manufacturing method thereof, the cable structure comprises a cable conductor, and the cable conductor comprises a center line and an external conductor wrapping the center line; the center line comprises an optical fiber, a conductor tube and a stranded wire; the optical fiber is arranged in the conductor tube in a penetrating mode, and the conductor tube is wrapped with the stranded wire. Thus, the optical fiber can be prevented from being damaged and even broken in the using process, the temperature of the cable conductor can be accurately monitored through the optical fiber, the safety and reliability of the cable structure are improved, meanwhile, the mechanical performance and the current-carrying capacity of the cable structure can be guaranteed, and the cable structure can provide support for safe operation of a power system; in addition, the manufacturing cost of the cable structure can be reduced, the weight of the cable structure is reduced, and the cable structure is convenient to install.

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 provides a safety monitoring method and device applied to a cable pipe gallery and a storage medium, and the method comprises the steps: controlling an inspection trolley to carry out the inspection of an area where a cable assembly is located, so as to obtain a surface temperature; judging whether a refrigerating system arranged in the internal space is operated or not according to the surface temperature; and if yes, the refrigerating temperature and the air outlet angle of the refrigerating system are adjusted according to the surface temperature and the indoor environment temperature of the inner space. The technical problems that a traditional cable temperature monitoring method mainly depends on manual inspection or a fixed temperature sensor, and manual inspection is low in efficiency, poor in real-time performance, difficult to cover all areas and the like are solved. A fixed temperature sensor has the defects of limited installation position, limited monitoring range, difficulty in flexible adjustment and the like. In addition, the internal environment of the cable pipe gallery is complex, the space is long and narrow, air circulation is not smooth, a local high-temperature area is easily formed, and a traditional temperature monitoring method is difficult to meet comprehensive and accurate monitoring requirements.

The invention belongs to the technical field of optical cables, and discloses a composite structure butterfly-shaped leading-in optical cable which is provided with a cable core and at least one protection layer wrapping the cable core, the cross section of the cable core is square, and the cable core comprises 2n butterfly-shaped units, four first insulation wires and third insulation wires with the number equal to the square number of n; the cable is characterized in that in the cable core, n third insulated wires form a group, n groups are formed, the n groups of third insulated wires are stacked to form a power transmission unit with a square cross section, the power transmission unit is located in the center of the cable core, n / 2 butterfly-shaped units are arranged in the length direction and are tightly attached to and aligned with one side of the power transmission unit, four first insulated wires are located at the four corners of the cable core, and n is larger than or equal to 1 and smaller than or equal to 2. N is a positive even number. The device has the main beneficial technical effects of simple structure, easiness in manufacturing, low equipment requirement, high production speed, high percent of pass and easiness in stacking and management.

The invention provides a novel intelligent early-warning fire-resistant medium-voltage cable and a preparation method thereof, and the cable comprises a cable core which comprises a conductor which is formed by compressing and twisting a plurality of annealed soft copper wires; the communication optical cable and the temperature measuring optical cable are arranged in the cable core, the temperature measuring optical cable is used for collecting whole-line temperature signals of the cable in real time, and the communication optical cable is used for receiving the whole-line temperature signals of the cable collected by the temperature measuring optical cable in real time, converting the signals into optical signals and transmitting the optical signals to a control terminal; the control terminal analyzes the received temperature data and controls the working state of the early warning device. The fireproof structure is arranged on the outer side of the cable core; the protective layer structure is arranged on the outer side of the fireproof structure; real-time monitoring, transmission and early warning of fire temperature signals are achieved through the optical cable communication technology, meanwhile, the continuous power supply and information transmission capacity of the cable in the fire high-temperature environment is ensured, precious time is won for rescue, and the use safety of the cable is improved.

The invention relates to the technical field of cables, in particular to a strong-acid-resistant and high-temperature-resistant silicone rubber cable and a processing technology thereof.The strong-acid-resistant and high-temperature-resistant silicone rubber cable sequentially comprises a multi-core insulating wire core, a filling layer, a cabling cable core wrapping tape, a shielding layer, an optical fiber unit, a buffer layer, a fluorocarbon protective layer and a corrosion-resistant and high-temperature-resistant sheath layer from inside to outside. Through the multi-layer protection design of the conductor anticorrosion priming coat, the insulating layer fluorosilicone resin protection layer, the filling layer-wrapping tape-buffer layer ceramic silicone rubber synergistic protection, the hydrophobic anti-permeation interlayer and the sheath layer acid-resistant filler, a compact acid-resistant protection system is formed, the cable is soaked in sulfuric acid / hydrochloric acid with the concentration of 50% and the temperature of 250 DEG C for 720 h, and the cable has the good anti-corrosion performance. The sheath layer and the wrapping tape do not crack, swell or fall off, the insulation performance is not obviously reduced, the problem that an existing cable is prone to aging and damage under strong acid is solved, double corrosion prevention of the conductor is achieved, and strong acid corrosion is thoroughly avoided.

The invention discloses a high-flame-retardant temperature-resistant corrosion-resistant optical fiber composite cable and a preparation method thereof, and belongs to the technical field of cable manufacturing, and the high-flame-retardant temperature-resistant corrosion-resistant optical fiber composite cable sequentially comprises an optical fiber unit, a conductor layer, an insulating layer, a shielding layer, a corrosion-resistant layer and a sheath layer from inside to outside. The optical fiber unit adopts a ceramic silicone rubber buffer layer; the conductor layer is a nickel-plated copper alloy stranded wire, and the oxidation resistance is enhanced through nano titanium dioxide sol treatment; the insulating layer is of a three-layer co-extrusion structure; the shielding layer adopts an aluminum-plastic composite belt and tinned copper wire braided composite structure; the anti-corrosion layer is a polytetrafluoroethylene film subjected to plasma treatment; the sheath layer is made of two-component ceramic silicone rubber, is flexible after being vulcanized at normal temperature, and is converted into a ceramic body at high temperature. According to the optical fiber composite cable, through the collaborative design of a multi-layer structure, the performance of excellent continuous use stability, high salt mist environment corrosion resistance and the like is achieved, the optical fiber composite cable is suitable for high-temperature, corrosion, fire and other severe environments, and the safety and durability of the composite cable are remarkably improved.

The invention belongs to the technical field of optical cables, and particularly relates to a cable with a butterfly-shaped lead-in unit, the cable is provided with an outer protective layer and an inner protective layer, the outer protective layer is located outside the inner protective layer, at least two butterfly-shaped lead-in optical cable distribution layers are arranged between the outer protective layer and the inner protective layer, and the inner protective layer and the butterfly-shaped lead-in optical cable distribution layers are clamped layer by layer; the cable has the beneficial effects of simple structure, easy expansion, firm fixation, light weight of the butterfly-shaped introduction unit, low cost, wide application range, good mechanical performance and the like, and the inner protection layer is provided.

The invention discloses an intelligent composite cable based on modal isolation and a preparation method thereof. The cable comprises a power transmission layer, a control signal layer, an optical fiber communication layer and an intelligent protection and external shielding layer which are sequentially arranged from inside to outside. The power transmission layer comprises a conductor layer, a conductor insulation layer and a first shielding layer for attenuating a low-frequency strong magnetic field which are sequentially arranged from inside to outside; the control signal layer comprises a total shielding layer and a plurality of control wire cores which are uniformly arranged between the total shielding layer and the power transmission layer along the circumferential direction, and each control wire core is provided with a branch shielding layer; the optical fiber communication layer comprises a plurality of optical fiber groups which are uniformly arranged along the circumferential direction, each optical fiber group is provided with a second shielding layer for electric absorption, and the second shielding layer is a non-metal shielding layer; the intelligent protection and external shielding layer is provided with a third shielding layer used for equipotential shielding. According to the invention, a layered composite structure is adopted, the reliability of mechanical performance is ensured, and an asymmetric shielding framework is adopted, so that full-spectrum interference suppression from extremely low frequency to high frequency is realized.

The present application relates to the technical field of optical cables, aims to solve the technical problem that some known optical cables fixed to deep sea clamps are prone to separation from the clamps under the action of radial water pressure, and provides a pressure-resistant structure, a pressure-resistant optical cable and a manufacturing method. The pressure-resistant structure can be bent into a ring and is arranged between an inner sheath and an outer sheath of an optical cable. The pressure-resistant structure comprises: a plurality of supporting units which sequentially abut against the inner sheath in the circumferential direction thereof, each supporting unit comprising a first abutting plate abutting against the inner sheath and two side plates, the two side plates being respectively connected to the two ends of the first abutting plate, and the distance between the two side edge plates in a direction away from the first abutting plate being smaller than the distance between the two ends of the first abutting plate; and a plurality of second abutting plates which are arranged at intervals in the circumferential direction of the inner sheath, the two ends of each second abutting plate being respectively connected to the two side plates of every two adjacent supporting units that are close to each other. The present application has the beneficial effect of improving the pressure resistance of pressure-resistant optical cables.

The invention relates to the technical field of power cables, in particular to a molded line stranded aluminum alloy conductor optical fiber composite low-voltage power cable and a preparation method thereof.The molded line stranded aluminum alloy conductor optical fiber composite low-voltage power cable comprises a plurality of power line cores which are tangent in pairs and stranded mutually, and heat dissipation channels are formed in the inner sides of the N power line cores; the heat conduction layer is filled in the heat dissipation channel and forms a preset shape; and the foaming filling layer is filled at the outer sides of the two adjacent power wire cores and is wrapped and fixed by a wrapping layer to form a cable core with a circular cross section. The distribution positions of the wire cores and the optical fibers and the heat dissipation channels of the optical fibers are improved, and heat generated by the power wire cores can be transmitted to the outside of the cable by avoiding the positions of the optical fibers through the first heat conduction channels of the inner sheath, the shielding layer and the outer sheath; and the heat dissipation channel on the inner side of the conductor can be used as a second heat conduction channel to transmit along the axis of the cable, so that the temperature of the environment where the optical fiber unit is located can be effectively reduced.