47results about "Power cables for overhead application" patented technology

The invention relates to the technical field of power cables, and provides a high-strength copper core cross-linked polyethylene insulated overhead power cable, which comprises a conductor, a shielding layer, a cross-linked polyethylene insulating layer and a sheath layer, and is characterized in that the conductor is formed by twisting a plurality of wires, the shielding layer is coated outside the conductor, the cross-linked polyethylene insulating layer is coated outside the shielding layer, and the sheath layer is coated outside the cross-linked polyethylene insulating layer. The cable comprises a cross-linked polyethylene insulating layer, a sheath layer and a tensile layer, the cross-linked polyethylene insulating layer is coated with the sheath layer, the tensile layer is arranged between the cross-linked polyethylene insulating layer and the sheath layer, a plurality of positioning assemblies are arranged outside the sheath layer at equal intervals, the tensile assembly is arranged between every two positioning assemblies, and the cross-linked polyethylene insulating layer is arranged in the sheath layer. By means of the technical scheme, the problems that in the prior art, due to the weather influence, the cable is prone to galloping, the cable is prone to being damaged due to vibration or too large tension, and then the operation stability of an electric power system is affected are solved.

This invention relates to the field of overhead cable technology and proposes a wear-resistant cross-linked polyethylene overhead insulated cable, comprising a cable, a flexible sheath, a lifting frame, a swing support assembly, and a wire pressing assembly. The flexible sheath is fitted onto the cable, the lifting frame is suspended from a power support, the cable is placed on the swing support assembly, and a fan-shaped support seat is rotatably connected to the lifting frame, contacting the flexible sheath. When the cable slides axially, it can drive the fan-shaped support seat to rotate. The cable at both sides of the flexible sheath contacts two collars in the wire pressing assembly, which presses the cable downward, causing the flexible sheath to contact the fan-shaped support seat. The flexible sheath can move between the two collars. This technical solution addresses the problem in the prior art where the overhead cable and the hardware clamping part are easily worn, causing damage to the cable sheath.

The invention provides a steel wire rod for a 2300MPa-grade steel-cored aluminum strand and a production method of the steel wire rod. The method sequentially comprises the following steps of molten iron pre-desulfurization, converter smelting, external refining, continuous casting, casting blank heating, high-speed wire rolling and online isothermal quenching and tempering, and the steel wire rod is obtained. On the basis of adjustment of chemical components of the wire rod and control over production processes such as continuous casting, rolling and online quenching-tempering treatment, the homogeneity of steel is improved, the metallographic structure of the wire rod prepared through the production method is mainly sorbite, the sorbite rate is larger than or equal to 97%, and the sorbite lamellar spacing is 45-65 nm; the tensile strength is 1620 to 1700 MPa, and the percentage reduction of area is 35 to 44 percent; the steel wire rod is drawn, galvanized and twisted into a galvanized steel strand which can be used for a steel core of a steel-cored aluminum strand.

The invention relates to the technical field of power cables, and discloses a cross-linked polyethylene insulated aerial cable capable of quickly cross-linking silane and a preparation method of the cross-linked polyethylene insulated aerial cable. The conductor shielding layer is extruded on the outer side of the conductor; the insulating layer is extruded on the outer side of the conductor shielding layer; the insulation shielding layer is extruded on the outer side of the insulation layer; the metal shielding layer is arranged on the outer side of the insulation shielding layer; the cable outer sheath is arranged on the outer side of the metal shielding layer; and the outer side of the cable outer sheath is provided with a heat storage assembly which is located at an easy-to-overheat part. Through the arranged heat storage assembly, when a cable connector or a local line is overheated due to overload, contact resistance increase and the like, heat is transferred to the heat storage assembly, once the temperature reaches the set melting point of the phase change material, the phase change material is subjected to phase change and absorbs a large amount of latent heat, and the temperature of the overheated part can be stably maintained near the phase change point; and thermal buffering is formed, and out-of-control rising of the temperature and spreading of heat can be prevented within a certain range.

The invention relates to the technical field of aerial cables, and provides a wear-resistant cross-linked polyethylene aerial insulated cable which comprises a cable, a flexible sheath, a lifting frame, a swing supporting assembly and a wire pressing assembly, the cable is sleeved with the flexible sheath, the lifting frame is hung on an electric power support, the cable is placed on the swing supporting assembly, and the wire pressing assembly is arranged on the swing supporting assembly. The fan-shaped supporting seat is rotationally connected to the lifting frame, the fan-shaped supporting seat is in contact with the flexible sheath, when the cable slides in the axial direction, the fan-shaped supporting seat can be driven to rotate, the positions, located on the two sides of the flexible sheath, of the cable are in contact with two lantern rings in the cable pressing assembly respectively, the cable pressing assembly can press the cable downwards, and the cable can be driven to rotate; according to the technical scheme, the flexible sheath is enabled to be in contact with the fan-shaped supporting seat, the flexible sheath can move between the two lantern rings, and by means of the technical scheme, the problem that in the prior art, the cable sheath is damaged due to the fact that the clamping portion of an aerial cable and a hardware fitting is prone to abrasion is solved.

A power cable system, comprising a power cable, and a cooling device thermally coupled to the power cable, wherein the cooling device comprises an enclosure, wherein a first region of the enclosure is configured to absorb heat from one part of the power cable, wherein a second region of the enclosure is configured to release heat to another part of the power cable, another object or the environment, and wherein the cooling device has a two-phase heat transfer mechanism inside the enclosure for conducting a heat transfer between the first region and the second region.

The invention relates to the technical field of cables, in particular to an aerial cable with an intelligent regulation and control system, which comprises a cable body, the cable body is composed of a conductor, a conductor insulator, a conductor shield, a filler, an inner sheath, an insulation shield and an outer sheath from inside to outside, and a compression type flexible flow guide pipe is arranged between the inner sheath and the outer sheath. According to the aerial cable with the intelligent regulation and control system, the temperature and humidity of the surrounding environment can be monitored through the intelligent detection cover installed at the end position, so that the operation condition of the whole cable is judged, then the externally-hung driving module installed on the outer side of the cable is started according to needs, and the cable can be adjusted and controlled. The external mounting type driving module is used for injecting heat exchange liquid into the compression type flexible flow guide pipe, the compression type flexible flow guide pipe can be expanded and subjected to temperature adjustment through the heat exchange liquid, deicing, snow removing and bird flock removing operation is carried out on the surface of the cable, the safety and durability of the cable are improved, and the intelligent level is enhanced.

The application relates to the technical field of electric wires and cables, and particularly discloses an overhead parallel bundled conductor. The overhead parallel bundled conductor comprises at least two parallel arranged conductors, and adjacent conductors are fixedly connected through connecting ribs; an insulating layer is arranged on the outer wall of the conductor; the insulating layer comprises the following raw materials: cross-linked polyethylene, an antioxidant, an ultraviolet absorber, nano magnesium oxide, methyl vinyl silicone rubber, flaky boron nitride and a silane coupling agent. The obtained overhead parallel bundled conductor has a heat conduction coefficient of 0.60 W / mk, the elongation at break reduction rate after heat aging is at least 5.0%, the heat dissipation of the overhead parallel bundled conductor is improved, the volume resistivity at 20 DEG C is at most 2.56*1014 ohm*cm, the dielectric strength is at most 40 kV / mm, and the insulating performance of the overhead parallel bundled conductor is improved.

The application discloses a light overhead line for high altitude, which comprises a conductor made of high-conductivity aluminum alloy, and the cross section of the conductor is low-speed airfoil shape. The application breaks the inherent traditional thinking, optimizes the material of the conductor to reduce the self weight, and innovatively optimizes the cross section of the conventional conductor from a circle to a low-speed airfoil shape. In combination with the existing high-conductivity aluminum alloy material, when the conductor is used overhead, the Bernoulli effect is utilized to generate lift to offset part of the self weight of the overhead line, so that the safety of the line is enhanced. Meanwhile, the cross section structure of the low-speed airfoil shape increases the surface area of the conductor, which is more conducive to heat dissipation of the conductor, so that the current-carrying capacity of the line is increased, and the power loss of the long-distance power transmission line is reduced.

It is disclosed a drop cable comprising a transmission unit, a strength member arranged alongside the transmission unit and an outer sheath surrounding the transmission unit and the strength member. The transmission unit comprises two insulated conductors and an optical subunit comprising six or more optical fibers, the optical subunit and the insulated metallic conductors being stranded together and surrounded by a sleeve. Moreover, a diameter of the strength member is substantially equal to or higher than a diameter of the transmission unit.

A drop cable includes a transmission core, a strength member arranged alongside the transmission core and an outer sheath surrounding the transmission core and the strength member. The transmission core comprises two insulated conductors and an optical sub-core comprising one or more optical fibers, the optical sub-core and the insulated metallic conductors being stranded together and surrounded by a sleeve. Moreover, a diameter of the strength member is substantially equal to or higher than a diameter of the transmission core.

The invention relates to the technical field of overhead conductors, and provides an anti-aging overhead insulated conductor which sequentially comprises a wire core, a shielding layer and a protective layer from inside to outside. The wire core is composed of a conductor and an insulating layer wrapping the outer side of the conductor, and the conductor is formed by twisting a plurality of aluminum alloy wires. According to the technical scheme, the problem of insufficient aging resistance of the overhead insulated wire in the prior art is solved.

An overhead cable for the transmission of low– voltage and medium–voltage energy and digital signals, comprising a central fiber–optic cable, surrounded by a protective covering of the central fiber–optic cable and around such protective covering of such fiber optics by at least an aluminum alloy layer for the transmission of low–voltage and medium–voltage electric power or neutral wire and the covering thereof, where at least one aluminum alloy layer comprises a 6101 aluminum alloy wire that has been heat treated, submitting the same to a temperature within a range of 260 and 300°C and a treatment process for the aluminum alloy drawn wire.

The invention discloses a high-altitude light overhead line which comprises a conductor made of high-conductivity aluminum alloy, and the cross section of the conductor is in a low-speed wing shape. According to the invention, the inherent traditional thinking is broken through, the purpose of reducing the self weight is achieved by optimizing the material of the conductor, the conventional conductor section is innovatively optimized into a low-speed wing shape from a circular shape, and the conventional high-conductivity aluminum alloy material is combined, so that when the wire is used in an overhead manner, the self weight is reduced. The Bernoulli effect is utilized to generate lift force to counteract the self gravity of part of the overhead line, so that the safety of the line is enhanced; meanwhile, the low-speed wing section structure increases the superficial area of the conductor and is more beneficial to heat dissipation of the conductor, so that the current-carrying capacity of the line is increased, and the electric energy loss of the long-distance power transmission line is reduced.

The application relates to a replaceable optical fiber monitoring cable and a replacement method thereof, and belongs to the technical field of optical fiber monitoring. Step one: when the optical fiber in the monitoring cable needs to be replaced, a part of the outer tube, the stainless steel wire layer and the inner tube at one end of the monitoring unit in the monitoring cable are peeled off in sequence, so that one end of the optical fiber unit to be replaced is exposed; step two: aramid yarn at one end of the exposed optical fiber unit to be replaced is peeled off, and the peeled aramid yarn and aramid yarn in the optical fiber unit to be installed are uniformly wound together, and the two are integrated; step three: the other end of the optical fiber unit to be replaced is uniformly pulled out, and the optical fiber unit to be replaced is uniformly wound on the take-up frame at a constant speed; the optical fiber unit to be installed is uniformly released through the pay-off frame at a constant speed, the optical fiber unit to be installed is pulled and introduced into the monitoring cable, and the replacement of the optical fiber is realized. The application can quickly replace the optical fiber, saves time and effort, and ensures that online monitoring can be continuously carried out during the use of the overhead cable.

The application discloses a 10kV overhead insulated cable, a tin layer is plated on the surface of a copper single wire to obtain a tin-plated copper single wire, the tin-plated copper single wire is twisted to obtain a conductor; an insulating layer mixture is extruded on the conductor and a steel wire rope respectively to form an insulating layer, a core and a tensile rope are obtained; one tensile rope is taken as an axis, and a plurality of cores are twisted with the tensile rope to obtain a cable core; a tin-plated copper single wire is woven outside the cable core to form a shielding layer; a sheath mixture is extruded on the outside of the shielding layer to form a sheath, and the overhead insulated cable is obtained. The overhead insulated cable has excellent mechanical properties and high and low temperature resistance, and can meet the 10kV power transmission requirement.

The application relates to the field of cables, in particular to a balanced structure cable for high-altitude power transmission and a manufacturing method thereof, which comprises a core, an insulation layer, a shielding layer, a waterproof layer, a metal sheath and a balancing layer which are sequentially arranged from inside to outside, the core comprises a copper conductor and is used for transmitting electric energy; the insulation layer comprises powdered magnesium oxide and is used for preventing electric energy leakage or cable short circuit; the shielding layer is used for reducing electromagnetic interference; the waterproof layer is used for preventing moisture from entering the shielding layer; the metal sheath is used for protecting the overall structure of the cable; and the balancing layer is used for improving the balancing capacity of the cable. The pressure buffer zone can disperse the force received by the cable through the expansion and contraction of the spring-shaped structure, meanwhile, the shunt zone disperses the wind force through air pressure, and the above structure improves the balancing capacity of the cable when the cable is affected by external factors, so that the cable can normally work even in severe weather.

The invention discloses a 10kV overhead insulated cable, which is prepared by the following steps of: plating a tin layer on the surface of a copper monofilament to obtain a tin-plated copper monofilament, and twisting to obtain a conductor; respectively extruding an insulating layer mixture outside the conductor and the steel wire rope to form an insulating layer so as to obtain a wire core and a tensile rope; taking a tensile rope as an axis, and cabling and twisting a plurality of wire cores and the tensile rope to obtain a cable core; tinned copper monofilaments are woven outside the cable core to form a shielding layer. And extruding a sheath mixture on the outer side of the shielding layer to form a sheath. The overhead insulated cable has excellent mechanical properties and high and low temperature resistance, and can meet the requirement of 10 kV power transmission.

The invention relates to the technical field of cables, and provides a high-strength Z-shaped expanded-diameter aerial insulated cable which sequentially comprises a Z-shaped expanded-diameter conductor, a shielding layer, an insulating layer and a sheath layer from inside to outside. The Z-shaped diameter-expanded conductor comprises a diameter-expanded aluminum tube and a Z-shaped wire conductive layer twisted on the outer side of the diameter-expanded aluminum tube. According to the technical scheme, the problem that the mechanical property of the aerial insulated cable is insufficient in the related technology is solved.

The invention discloses a high-performance intelligent reinforced fiber composite material core overhead conductor and a preparation method, the overhead conductor comprises an intelligent reinforced fiber composite material core, and the periphery of the intelligent reinforced fiber composite material core is coated with a metal molded stranded wire, a variable temperature layer, an alloy sheath and a graphene coating from inside to outside. The intelligent reinforced fiber composite material core comprises an optical fiber bundle, filling paste, a stainless steel tube and a reinforced fiber composite material layer from inside to outside, the metal stranded wire comprises a plurality of layers, each layer is formed by twisting and pressing a plurality of trapezoidal metal single wires, the adjacent layers are opposite in direction, and the metal stranded wire is formed by twisting a plurality of trapezoidal metal single wires. The overhead conductor has the advantages of high current-carrying capacity, high reliability and long service life.

A conductor (200) for overhead power lines, comprising: at least one electrically conductive skirt (210, 220); an aluminum tube (230), radially internal to said at least one conductive skirt (210, 220); a load-bearing core (240) of carbon fibre, radially internal to said aluminum tube (230); a sensor element (270), comprising: a metal tube (280), radially internal to said load-bearing core (240), and one or more optical fibres (250), radially internal to said metal tube (280).

The invention relates to the technical field of cables, and provides a composite overhead cross-linked polyethylene insulated cable which comprises a cable digging groove, a fastening ring, a sealing groove body, an extension support arm assembly and a connector frame body, the cable digging groove is formed in an insulating layer and filler, an optical fiber is located in the cable digging groove, the sealing groove body is fixedly arranged in the cable digging groove, and the extension support arm assembly is arranged in the connector frame body. The fastening ring is fixedly connected to the insulating layer, the opening is fixedly connected with the edge of the sealing groove body, the extension support arm assembly is arranged on the side, away from the sealing groove body, of the optical fiber, the extension support arm assembly is detachably connected with the optical fiber, the extension support arm assembly is used for pulling the optical fiber, the connector frame body is fixedly connected with the battery cell, and the connector frame body is fixedly connected with the fastening ring. The connector frame body is fixedly connected with the sealing groove body, the connector frame body is used for being connected with a power transmission line, and by means of the technical scheme, the problem that in the prior art, optical fibers are likely to be interfered by the cable at the connector position of an optical fiber and cell composite cable is solved.

The present application relates to the technical field of power cable, in particular to a kind of intelligent monitoring type water-blocking medium-strength aluminum alloy core overhead insulated cable, including stranded conductor, stranded conductor includes wire core and multiple special-shaped aluminum filaments.Wire core and multiple special-shaped aluminum filaments are tightly pressed and stranded, and every two special-shaped aluminum filaments between the adjacent special-shaped aluminum filaments of the axial direction of wire core are provided with balance piece.Gap space is defined between balance piece and its adjacent special-shaped aluminum filaments, and water-blocking powder is filled in gap space in initial state.A kind of intelligent monitoring type water-blocking medium-strength aluminum alloy core overhead insulated cable of the present application is provided with stranded conductor and balance piece, and the stress of special-shaped aluminum filaments when thermal expansion and cold shrink can be released by balance piece, which reduces the adverse effects on cable, and makes the water-blocking powder in gap space keep stable, avoids the movement and reorganization of water-blocking powder, so as to change its water-blocking effect.

The invention relates to the technical field of cables, in particular to a preparation method of a high-voltage cable and the high-voltage cable. The method comprises the following steps that 1, a plurality of cable wires are installed on the peripheral side of an air bag core body; 2, packaging an outer sheath on the outer sides of the plurality of cable wires to obtain a cable with a standard length; 3, connecting a plurality of standard length cables one by one to obtain a high-voltage cable product; a main body of the cable is an air bag core body, a plurality of cable wires are installed on the peripheral side of the air bag core body, and a sheath is arranged on the outer sides of the cable wires; according to the invention, the hollow ventilation channel is arranged in the cable, and when the cable is in a low-temperature environment, air at a proper temperature is injected into the ventilation channel, so that an ice layer on the surface of the cable is melted, and the processing efficiency of the icing condition of the outer side of the cable is improved.

The invention relates to a weather-proof large-section aerial insulated cable and a preparation method and application thereof, and belongs to the technical field of cables. The weather-proof large-section overhead insulated cable is provided with a steel core layer, an aluminum wire layer, a conductor shielding layer and an outer sheath layer from inside to outside in sequence. Wherein the steel core layer is of at least one layer of steel wire structure, the aluminum wire layer is of at least one layer of aluminum wire structure, and the outer sheath layer is made of crosslinked polyethylene materials. According to the invention, the multi-layer conductor layer structure is adopted, the electrical property is excellent, the cable is suitable for a large-section aerial cable, and the cross-linked polyethylene material of the prepared outer sheath layer is high in tensile strength, excellent in elongation at break performance, good in mechanical property, capable of effectively resisting aging, high in dielectric strength, capable of effectively insulating and high in reliability. Therefore, the prepared weather-resistant large-section overhead insulated cable has excellent performance.

A composition for coating an overhead conductor is disclosed comprising: (i) a reflective agent; (ii) a photocatalytic agent comprising ≥70 wt % anatase titanium dioxide (TiO2) having an average particle size (“aps”)≤100 nm; (iii) a polyorganosiloxane binder; and (iv) a superhydrophobic agent comprising either: surface functionalised silica nanoparticles, a functional polysiloxane or a polymethylsilsesquioxane.

A power cable system, comprising a power cable, and a cooling device thermally coupled to the power cable, wherein the cooling device comprises an enclosure, wherein a first region of the enclosure is configured to absorb heat from one part of the power cable, wherein a second region of the enclosure is configured to release heat to another part of the power cable, another object or the environment, and wherein the cooling device has a two-phase heat transfer mechanism inside the enclosure for conducting a heat transfer between the first region and the second region.

The application discloses a fireproof anti-interference low-voltage power cable and relates to the technical field of low-voltage cables. Arc-shaped positioning grooves are equidistantly arranged on the bottom of the surface of an outer protective layer, arc-shaped positioning strips are equidistantly attached to the bottom of the outer protective layer, support protrusions are symmetrically and fixedly connected to the two ends of the arc-shaped positioning strips, arc-shaped mounting grooves are arranged on the bottom of the support protrusions, limit rubber protrusions are symmetrically and fixedly connected to the two ends of the bottom of the arc-shaped mounting grooves, and side support steel wires are arranged to penetrate through the arc-shaped mounting grooves. The arc-shaped positioning strips are positioned and mounted by the cooperation of the spliced clamping grooves and the clamping sharp blocks, are clamped in the arc-shaped positioning grooves, and are positioned by the two support protrusions, so that the two side support steel wires are symmetrically arranged on the two sides of the surface of the cable. The two side support steel wires are hung and play a role in supporting and stabilizing the cable, so that the pressure on the cable during the hanging and mounting of the cable is relieved.

The application discloses a kind of steel-cored aluminium stranded conductor polyethylene insulated overhead cable, belong to cable technical field, this steel-cored aluminium stranded conductor polyethylene insulated overhead cable, including outer sheath, the inner side of outer sheath is provided with outer layer protection mechanism, and the outer side of outer layer protection mechanism is provided with anti-freezing mechanism, the inside of outer layer protection mechanism is evenly provided with seven columns strip hollow air bag along outer sheath axial direction, and adjacent two column strip hollow air bag is staggered distribution, the inner side of outer layer protection mechanism is provided with inner layer protection mechanism.The application is provided with anti-freezing mechanism on rubber layer, and make that strip heat conduction piece is located at the bottom position of overhead cable outer sheath inner side, only through carbon fiber heating wire cooperation strip heat conduction piece icing treatment is carried out to hang ice located at the bottom of outer sheath outer side, neither too much increase the self weight of overhead cable, can realize the effect of heating and deicing to overhead cable outer side.