88results about "Power cables for overhead application" patented technology

The invention discloses a crosslinked polyethylene reinforced high-strength insulating aerial cable, and belongs to the technical field of crosslinked polyethylene cable materials.The crosslinked polyethylene reinforced high-strength insulating aerial cable is prepared by the steps that hydroxyl is introduced to nano boron nitride powder, then amino is grafted through KH-550, nano alpha-Al2O3 powder is modified through gamma-glycidyl ether oxypropyl trimethoxy silane, and the cross-linked polyethylene reinforced high-strength insulating aerial cable is obtained; the preparation method comprises the following steps: preparing low-density polyethylene, compounding the low-density polyethylene with aminated nano boron nitride powder to form nano composite powder, improving the interface bonding force between the low-density polyethylene and the nano composite powder, carrying out melt blending on the low-density polyethylene and the nano composite powder to improve the dispersity of the nano composite powder in the low-density polyethylene, and carrying out nucleophilic acyl substitution reaction to obtain a fluorine-containing modified monomer. The nano boron nitride powder and the nano alpha-Al2O3 powder are subjected to a cross-linking reaction under the initiation action of an initiator and then coat the exterior of the thermal insulation layer, and the nano boron nitride powder and the nano alpha-Al2O3 powder are bridged through siloxane bonds to form a three-dimensional heat-conducting network, so that the heat resistance of the outer insulating layer is improved.

The invention relates to the technical field of cables, and discloses a weather-proof high-strength tensile aerial insulated cable and a preparation method thereof.The weather-proof high-strength tensile aerial insulated cable comprises a cable conductor, a protection mechanism is arranged outside the cable conductor, a supporting mechanism is arranged inside the protection mechanism, and an outer sheath is connected to the outside of the protection mechanism through a cushioning mechanism; the exterior of the cable conductor is fixedly connected with a force bearing layer, the exterior of the force bearing layer is provided with a repairing layer, the exterior of the repairing layer is fixedly connected with a heat insulation fireproof layer, the cushioning mechanism comprises an elastic rubber layer, and the inner side of the elastic rubber layer is fixedly connected to the exterior of the heat insulation fireproof layer. According to the invention, through the hollow bionic structure with the diaphragm in the core tubular bearing layer, the self weight is greatly reduced, and excellent bending resistance and torsional rigidity are provided at the same time; when the bearing layer is accidentally impacted, the internal diaphragm can effectively prevent longitudinal spreading of microcracks like a firewall, and damage is limited locally.

The invention relates to the technical field of steel-cored aluminum stranded wires, and provides an overhead high-conductivity steel-cored aluminum stranded wire which comprises a galvanized steel core and aluminum wires stranded on the surface of the galvanized steel core, the galvanized steel core is formed by stranding 19 steel wires, and the aluminum wires are divided into two layers and stranded on the outer side of the galvanized steel core; the preparation method of the galvanized steel core comprises the following steps that after being galvanized, a steel wire is added into a passivation solution to be passivated, and the galvanized steel core is obtained after drying and twisting; the passivation solution is prepared from the following raw material components: waterborne acrylic resin, nickel nitrate, sodium carboxymethyl cellulose, sodium dodecyl sulfate, functionalized single-walled carbon nanotubes and water; the functionalized single-walled carbon nanotube is prepared from the following raw materials: a single-walled carbon nanotube and 5-carboxyl-2, 3-diaminopyridine. According to the technical scheme, the problem that the corrosion resistance of the manufactured overhead steel-cored aluminum stranded wire is poor due to the fact that the corrosion resistance of a galvanized steel core is poor in the prior art is solved.

The invention discloses a fireproof anti-interference low-voltage power cable, and relates to the technical field of low-voltage cables, arc-shaped positioning grooves are formed in the bottom of the surface of an outer protection layer at equal intervals, arc-shaped positioning strips are attached to the bottom of the outer protection layer at equal intervals, and supporting convex blocks are symmetrically and fixedly connected to the two ends of each arc-shaped positioning strip; and arc-shaped mounting grooves are formed in the bottoms of the supporting protruding blocks, limiting rubber protruding blocks are symmetrically and fixedly connected to the two ends of the bottoms of the arc-shaped mounting grooves, and side supporting steel wires are mounted in the arc-shaped mounting grooves in a penetrating mode. The two side supporting steel wires are clamped in the arc-shaped positioning grooves through the arc-shaped positioning grooves, then the two side supporting steel wires are positioned through the two supporting protruding blocks, the two side supporting steel wires are symmetrically distributed on the two sides of the surface of the cable, and the two suspended side supporting steel wires are used for supporting and stabilizing the whole cable. And the pressure borne by the cable during suspension installation is relieved.

The invention relates to the technical field of overhead conductors, and provides a high-conductivity overhead conductor which sequentially comprises a reinforcing core, an inner aluminum wire layer and an outer aluminum wire layer from inside to outside, each of the inner aluminum wire layer and the outer aluminum wire layer is formed by twisting a plurality of aluminum wires, and the reinforcing core is formed by twisting a plurality of galvanized steel wires; the preparation method of the reinforced core comprises the following steps that a steel wire is sequentially subjected to alkali washing, acid pickling, plating assisting, hot-dip galvanizing, passivation and twisting to obtain the reinforced core; during passivation, a passivation solution is prepared from, by weight, 20-25 parts of waterborne polyurethane, 15-20 parts of sodium silicate, 4-8 parts of sodium nitrate, 5-10 parts of modified graphene oxide, 3-5 parts of polyethylene glycol, 0.2-0.4 part of glacial acetic acid and 70-80 parts of water, and the modified graphene oxide is prepared from graphene oxide, a silane coupling agent and 3-aminopyrazine-2-carboxylic acid methyl ester. The problem of poor corrosion resistance of the overhead conductor in the prior art is solved.

The invention relates to the technical field of wires, in particular to a high-strength, high-conductivity and corrosion-resistant ceramic aluminum alloy wire and a production process, and the wire comprises a wire body which is composed of a reinforcing core, a stranded wire layer and a ceramic layer. According to the high-strength, high-conductivity and corrosion-resistant ceramic aluminum alloy conductor and the production process, a ceramic layer is formed on each single wire, and an insulating layer can be formed between the single wires, so that an insulating and shielding effect is achieved; corona and electromagnetic interference can be reduced through the ceramic layer; the pressure sensor modules which are connected in series are mounted on the inner side limiting ring on the inner side of the inner detection pipe, so that the bending change of different positions of the wire can be monitored in real time according to the change of the inner pressure; and the ceramic layer is formed through an electrochemical oxidation process, so that the lead has excellent corrosion resistance.

A self-cooling overhead bare conductor relates to the technical field of power transmission equipment and structurally comprises a conductor substrate, a graphene coating used for radiating heat is arranged on a backlight surface of the conductor substrate, and the coverage range of the graphene coating in the circumferential direction of the conductor substrate is 120-180 degrees. The graphene coating is arranged in a segmented mode in the length direction of the wire base body, the length of each segment of the graphene coating is 5 / 3-2 times of the diameter of the wire base body, and the distance between every two adjacent segments of the graphene coating is 0.85-1 time of the diameter of the wire base body. Sand blasting treatment is carried out on the joint face of the wire base body and the graphene coating, the surface roughness is Ra3.2-6.3 microns, oxidation films and impurities on the surface of the wire base body are removed, the adhesive force of the graphene coating is enhanced, and the thickness of the graphene coating is 40-80 microns. According to the invention, the technical problem of current limiting caused by temperature rise of the wire can be solved.

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 transmission line design, and discloses an offshore overhead power transmission line based on partial insulation and a design method, and the method comprises the steps: arranging an insulating layer at the lowest sag point of a bare conductor of the offshore overhead power transmission line, and arranging stress cones at joints at two ends of the insulating layer; the insulating layer is connected with the bare conductor through a wire pressing pipe to form a partially insulated conductor of the offshore overhead transmission line; a fixed pulley device is arranged on each tower, a heavy object is hung below the fixed pulley device, and an insulated wire of an insulated stay wire part of the fixed pulley device is connected so as to lift the lowest sag point of the insulated wire part. Through the local insulating layer, the fixed pulley, the insulating stay wire device and the stress cone structure, the wire voltage resistance and mechanical stability of the offshore overhead power transmission line are optimized, the performance of an offshore power transmission system is improved, and the corrosion and discharge risks of the power transmission line caused by the offshore environment are remarkably reduced.

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.

This invention discloses a high-strength, wear-resistant overhead conductor, relating to the field of overhead conductor technology. It includes a first conductor, a sleeve, and a second conductor arranged sequentially. The top of the sleeve is provided with a support cylinder and a side cylinder for flame retardancy. The side cylinder has a cavity for filling with flame retardant, and an air bladder communicating with the cavity is located outside the side cylinder. The cavity has a puncture mechanism for connecting it to the sleeve. The cavity also has a actuating mechanism for moving the flame retardant. The linkage mechanism includes a slider, a liquid box, and a flashing light. The slider is slidably disposed inside the support cylinder, the liquid box is installed inside the sleeve, and the flashing light is installed on the outer wall of the support cylinder. This high-strength, wear-resistant overhead conductor, through the inclusion of conductive components and a puncture mechanism, achieves the effects of preventing flame retardant solidification and rapid flame retardancy, thus improving the efficiency of overhead conductor use.

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 six 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.

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.

The present invention relates to the technical field of power transmission line design, and discloses a partially insulated offshore overhead power transmission line and design method. The method comprises: providing an insulating layer at the lowest point of sag of the bare conductor of the offshore overhead power transmission line, and providing stress cones at the joints at both ends of the insulating layer; connecting the insulating layer to the bare conductor via a wire crimping tube to form a partially insulated conductor of the offshore overhead power transmission line; and providing a fixed pulley device on each tower, with a weight suspended below the fixed pulley device, and connecting the insulated wire of the fixed pulley device to the insulated wire portion of the fixed pulley device to elevate the lowest point of sag of the partially insulated conductor. The present invention optimizes the conductor withstand voltage and mechanical stability of the offshore overhead power transmission line through the partial insulation layer, the fixed pulley and the insulated wire device, and the stress cone structure, thereby improving the performance of the offshore power transmission system and significantly reducing the risk of corrosion and discharge of the transmission line due to the offshore environment.

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.

The Glo Wire is the only product of its kind that integrates aluminum conductor steel reinforced (ASCR) with a reflective wire to enhance safety and efficiency when working on electrical operations. This unprecedented product is uniquely designed with durable, high-quality materials to ensure long-term sustainability and was created by professional electrical engineers.

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 discloses a coastal windproof high-capacity transmission conductor system, which comprises a capacity-increasing conductor and an anti-shear stress wire clamp, a liner is arranged in a wire groove of the anti-shear stress wire clamp, the liner wraps the capacity-increasing conductor, the capacity-increasing conductor comprises a steel core and an aluminum wire layer, the steel core is composed of a plurality of invar steels, and the aluminum wire layer is arranged in the steel core. The aluminum molded wire layer is a soft aluminum alloy wire layer, molded wires are regularly arranged on the surface of the soft aluminum alloy wire layer, and the molded wires are circumferentially arranged on the surface of the steel core in a surrounding mode in the radial direction of the steel core. The outer surface of the wire adopts a concave arc structure, so that the wind resistance coefficient is obviously reduced. The materials of the steel core and the aluminum molded wire layer and the structure of the aluminum molded wire layer work together, so that the transmission capacity of the wire system is improved, and meanwhile, the windproof performance is improved.

The invention discloses a power transmission line assembly for improving transmission capacity, which comprises a capacity-increasing wire and a novel wire clamp, and is characterized in that the cross section of the capacity-increasing wire is circular, the capacity-increasing wire comprises a steel core layer and a stranded wire layer, the steel core layer is an aluminum-clad invar steel core, and the aluminum-clad invar steel core is formed by concentrically stranding a plurality of aluminum-clad invar steel wires; the stranded wire layer is concentrically stranded with a plurality of layers of heat-resistant aluminum alloy wires outside the steel core layer, the stranding directions are alternate and reverse, and the outer surface of the novel wire clamp is made of high-conductivity aluminum alloy. The novel aluminum-clad invar steel core heat-resistant aluminum stranded wire is adopted to replace an original common steel core aluminum stranded wire, and the through-current capacity of the wire is improved. The steel core of the wire is designed into the aluminum-clad invar steel core, the mechanical strength of the steel core is greatly improved, and the wire has a better temperature sag characteristic, that is, after the operating temperature of the wire is increased, the gravity of the wire is completely borne by the invar steel core, and the problem that the sag of the wire is increased due to the temperature rise of the steel core when large current passes through is well solved.

Systems, methods and tools for the interrogation of fiber-reinforced composite strength members to assess the structural integrity of the strength members. The systems and methods utilize the transmission of light through optical fibers that are embedded along the length of the strength members. The inability to detect light through one or more of the optical fibers may be an indication that the structural integrity of the strength member is compromised. The systems and methods may be implemented without great difficulty and may be implemented at any time in the life cycle of the strength member, from production through installation. The systems and methods have particular applicability to bare overhead electrical cables that include a fiber-reinforced strength member.

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.