1294results about "Power cables" patented technology

The invention discloses a low-smoke halogen-free cross-linked polyethylene insulated power cable, and relates to the technical field of power cables, the low-smoke halogen-free cross-linked polyethylene insulated power cable comprises a central conductor, the outer side of the central conductor is tightly coated with a rubber insulation sleeve, and the outer sides of a plurality of rubber insulation sleeves are jointly coated with a limiting silicon rubber sleeve; the outer side of the limiting silicon rubber sleeve is evenly coated with axial supporting inner rings at equal intervals, the outer rings of the axial supporting inner rings are tightly coated with axial protection outer rings, the outer sides of the axial protection outer rings and the filling soft rubber sleeve are jointly coated with an isolation protection rubber sleeve, and the outer ring of the isolation protection rubber sleeve is tightly coated with an installation outer rubber sleeve. According to the cable, the situation that rain and snow are attached to the outer side of the cable, and consequently the overall weight of the cable is increased is effectively prevented, the transverse traction force of the connecting position of the ends of the cable during working is reduced, the fatigue aging rate of the connecting position of the cable is reduced, and the actual service life of the cable is prolonged.

The invention relates to the technical field of power transmission, and discloses a composite single-core power cable, comprising: a composite core composed of carbon fibers, glass fibers and a resin matrix containing a self-repairing microcapsule, the self-repairing microcapsule being capable of releasing a repairing monomer and repairing a microcrack when the composite core generates the microcrack; the conductor layer is arranged around the composite core and is composed of an aluminum conductor containing nano graphene; the insulating layer wraps the conductor layer and is made of a temperature-sensitive polymer material; and the outer sheath wraps the insulating layer and is made of a waterproof corrosion-resistant material. The composite core of the cable can recover more than 90% of original strength (the loss of tensile strength after repair is only 3%, which is recovered from 580Ksi to 570Ksi) within 24 hours after microcracks (such as the depth of 10mu m) generated by mechanical stress or fatigue in the operation process, and the self-repairing mechanism does not need manual intervention or external equipment, so that the self-repairing performance is greatly improved. And the sudden failure of the traditional cable caused by micro-damage accumulation is avoided.

The utility model discloses a pressure-resistant cross-linked polyethylene power cable which comprises an outer sheath, an armor layer, an oxygen isolation inner protection layer and a flame-retardant wrapping tape layer which are sequentially arranged from outside to inside, and a pressure-resistant cable core, a plurality of power cable cores and a plurality of interval units are arranged in the flame-retardant wrapping tape layer. According to the power cable, the oxygen isolation inner protection layer effectively prevents oxygen permeation and delays aging of the cable, and the flame-retardant belting layer improves the fireproof performance of the cable. The multiple surrounding plate bodies surround the pressure-resistant cable core, and the spacing plate bodies play a role in separating and fixing the power cable core, so that the pressure-resistant capability of the cable is improved, and the overall structure of the cable is more compact and stable. In addition, the insulating layer is made of the cross-linked polyethylene material, so that the cable has good insulating performance, short circuit can be effectively prevented, the safety and reliability of the cable are improved, and power transmission is stable and efficient.

The invention discloses a wear-resistant tensile power cable and a preparation method thereof, and relates to the technical field of power cables, the wear-resistant tensile power cable comprises a wire core, the interior of the wire core is a stranded wire structure formed by stranding a plurality of copper wires, the exterior of the wire core is coated with a crosslinked polyethylene insulating tube, and a centering assembly is fixedly installed on the outer surface of the wire core. According to the wear-resistant tensile power cable and the preparation method thereof, the hemp rope is filled in the special-shaped pipe for centering and stabilizing the whole structure, the silica gel coating is filled in the special-shaped pipe, an inner layer centering structure is formed after the coating is shaped, and the cable particles easy to flow are filled between the inner side surface of the special-shaped pipe and the special-shaped pipe. The cable particles improve the overall stability of the cable, and at the same time, when the outer layer protection structure is broken by tensile force, the inner layer centering structure is not damaged by tensile force, thereby solving the problem that the tight fixed connection between the outer layer protection structure and the inner layer centering structure of the cable easily causes the overall cable to be broken by tensile force and causes serious accidents.

The invention relates to the technical field of power cables, and provides a medium-voltage fireproof cable, which comprises a conductor, and an insulating layer, an armor layer and a sheath layer which are sequentially arranged outside the conductor, the insulating layer comprises the following components in parts by weight: 70-80 parts of polyethylene, 5-10 parts of a flame retardant, 3-5 parts of a cross-linking agent, 1-2 parts of a plasticizer and 1-3 parts of an antioxidant; the sheath layer comprises the following components in parts by weight: 100 parts of polyvinyl chloride, 8-16 parts of a flame retardant, 1-2 parts of a plasticizer, 1-3 parts of an antioxidant and 5-10 parts of filler; the filler comprises silicon dioxide, inorganic fibers and tetrapod-like zinc oxide whiskers. According to the technical scheme, the problem that the strength and the aging resistance of the cable in the prior art are poor is solved.

The invention discloses a preparation process optimization method and system for a tensile flame-retardant fireproof power cable, and relates to the technical field of intelligent control and optimization systems.The method comprises the step that optimization of the preparation process of the power cable is achieved by building an intelligent control platform. The method comprises the following steps: firstly, analyzing a preparation process, creating a twin process database, carrying out balance optimization according to preparation requirements, and establishing an optimization fitting scheme; and the preparation process is optimized through inter-process association identification and linkage response network. And the platform executes production based on the fitting scheme, collects data in real time and feeds back the data to the central processing center. And the central processing center generates real-time linkage response after processing the data, and establishes a self-optimization feedback mechanism. The technical problems of insufficient process control precision and unstable production process in the existing power cable preparation process are solved, and the technical effects of improving the process control precision and enhancing the stability of the production process are achieved.

The invention discloses a power cable convenient for cable butt joint connection, and relates to the technical field of power cables, the power cable comprises two conductors, the outer sides of the conductors are sleeved with neck bushes, and the outer sides of the neck bushes are provided with supporting and traction butt joint mechanisms; the supporting and traction butt joint mechanism comprises a corrugated pipe, a lantern ring, a semi-arc sleeve, a connecting block, an elastic rope, a clamping block, an embedding groove, a clamping groove, an arc-shaped cover, flame-retardant cotton, a heat conduction rubber strip, an iron gauze and a limiting groove, and the corrugated pipe is connected to the outer side of the neck bush in a sleeving mode. Through cooperation of the clamping grooves and the clamping blocks, the semi-arc sleeves are conveniently limited on the outer sides of the lantern rings through the connecting blocks, the splicing convenience is improved, and when two cables need to be in butt joint, the semi-arc sleeves are pulled to move, so that the semi-arc sleeves on the two cables are mutually clamped on the outer sides of the lantern rings of the two cables, and the elastic ropes on the two conductors are forced to be mutually staggered and pulled.

The invention discloses a 0.6 / 1kV cross-linked polyethylene cable and a preparation method thereof, and relates to the technical field of cross-linked polyethylene cables, the 0.6 / 1kV cross-linked polyethylene cable comprises a wire core, a cross-linked polyethylene bottom layer, a protective outer layer and a composite protective layer, and the composite protective layer is prepared by mixing expanded graphite and a thermal response hard generator; when the thermal response hard generating agent is heated and is at the heating reaction temperature, a solid hard object used for improving the hardness of the composite protection layer is generated, and after the expanded graphite is heated to expand and the thermal response hard generating agent is heated to generate the solid hard object, it can be guaranteed that the composite protection layer has the good hardness, and the service life of the composite protection layer is prolonged. When the composite protective layer is impacted in the heating process, the composite protective layer can still resist impact by using a solid hard object generated by heating, so that the situation that the impact resistance of the composite protective layer is seriously reduced after the expanded graphite is heated and expanded is avoided; therefore, the cross-linked polyethylene bottom layer and the wire cores in the cross-linked polyethylene bottom layer can still be well protected after the composite protection layer is impacted in the heating process.

The invention discloses a power cable and a cable connecting device thereof, and relates to the technical field of cables, the power cable comprises a main body assembly, the main body assembly comprises a connecting frame, an upper inlet is formed in the top end in the connecting frame, a lower inlet is formed in the bottom end in the connecting frame, the power cable further comprises an upper connecting assembly and a lower connecting assembly, and the lower connecting assembly is arranged below the main body assembly. Through mutual cooperation of a second elastic piece, a first air bag and a second air bag, when the cable is affected by the outside and shakes to cause looseness of the cable joint, the second air bag is not attached to the cable, so that the elastic potential energy of the second elastic piece is released to extrude the first air bag, and the second air bag expands to be tightly attached to the cable all the time; the tightness of cable connection is improved, and the sealing performance of the cable is ensured, so that the cable can normally transmit.

The invention relates to the technical field of power cables, in particular to a heat-aging-resistant crosslinked polyethylene insulated power cable and a preparation method thereof. The cable comprises conductor wire cores, an insulating layer, a filling layer, a composite function layer, a steel tape armoring layer and a sheath layer from inside to outside. The insulating layer is composed of semi-conductive crosslinked polyethylene, silicone resin, nano montmorillonite and an HALS light stabilizer; the filling layer is composed of plasticized glass fabric, polyphenylene sulfide and rare earth oxide; the composite functional layer sequentially comprises a heat-conducting inner layer, a flame-retardant middle layer and an anti-UV outer layer from inside to outside; the sheath layer is composed of polyolefin, white carbon black, ceramic silicone rubber, a flame retardant, polyethylene wax and an initiator. According to the cable, cross-linked polyethylene and silicone resin are preferably selected as heat-resistant materials, heat conduction / flame retardance / UV resistance / armored multi-layer synergistic protection is achieved, the mechanical barrier performance is improved, meanwhile, damage of thermal stress to internal materials is reduced, comprehensive improvement of thermal aging resistance is achieved, and the cable is suitable for high-temperature, high-humidity and frequent thermal cycle harsh environments.

The invention discloses an environment-friendly flame-retardant medium-voltage cable, and relates to the technical field of cables, the outer side of an inner conductor is provided with a flame-retardant protection assembly, the flame-retardant protection assembly comprises flame-retardant filling bodies, the middle parts of the opposite side surfaces of the adjacent flame-retardant filling bodies are provided with supporting grooves, and arc-shaped spring plates are adhered to the interiors of the supporting grooves. The outer side of the cable is extruded and collided, the impact force is attenuated layer by layer, the situation that the cable is damaged due to collision and impact is reduced, when the outer side of the cable is frozen, the heating wire emits heat, and the cable is prevented from being damaged. When the cable is deiced, the inflatable strip outside the insulating middle layer is uniformly heated, the outer insulating layer is pushed to bulge, and the ice layer outside is jacked open, so that the ice layer is broken and falls off, and compared with the conventional deicing method which only depends on heating, the energy consumption is lower, the cable is environment-friendly and energy-saving, the deicing effect is better, and the cable is more favorably protected.

The invention discloses a wrapping machine for photoelectric hybrid cable production, and relates to the technical field of wrapping devices.The wrapping machine is characterized in that a wire inlet frame is arranged on one side of a base, a wire inlet hole for wire inlet is formed in the wire inlet frame, a wire guiding frame is installed in the middle of the base, a wire guiding pipe is arranged on the wire guiding frame, and a wire winding frame is arranged at the other end, away from the wire guiding frame, of the base; the wire inlet frame is provided with a wrapping disc, a worm is connected to a center shaft of the wrapping disc, a wire leading pipe is arranged at the center shaft of the wrapping disc, a plurality of fixing plates are arranged on the wrapping disc in an annular array mode, worm wheels are rotationally connected into the fixing plates, a connecting plate is arranged on one side of each worm wheel, a wrapping cylinder is connected to the end, away from the corresponding worm wheel, of each connecting plate, and the wrapping cylinders are rotationally connected with the connecting plates; the device solves the problems that in the prior art, threaded holes are inconvenient to fix, the wrapping angle is inconvenient to adjust, a wrapping tape cannot be wound according to a fixed angle, different threaded holes need to be formed for angle adjustment, the time cost is large, and the overall photoelectric hybrid cable wrapping efficiency is affected.

The invention discloses a composite overhead insulated cable, and relates to the field of insulated cable devices, the composite overhead insulated cable comprises an insulated heat conduction layer, a plurality of groups of power transmission conductors are arranged in the insulated heat conduction layer, each power transmission conductor is formed by twisting a plurality of copper alloy wire cores, and a protection unit is arranged outside the insulated heat conduction layer. According to the composite overhead insulated cable, the positioning assembly is arranged in the cable, and the deformation limiting assembly and the extrusion buffer assembly are respectively arranged at the positioning assembly, so that multiple groups of power transmission conductors are positioned through the positioning assembly; effective extension of the cable under the conditions of torsion and extrusion force can be ensured through the deformation limiting assembly and the extrusion buffering assembly, so that the limiting assembly and the anti-extrusion assembly do not influence each other and buffer the generated torsion force and extrusion force, the overall pressure resistance of the cable can be improved, the rebound effect of the cable is ensured, and the service life of the cable is prolonged. The overall flexibility of the cable is improved, and the service life of the cable is prolonged.

The invention relates to the technical field of cables, and particularly discloses a high-performance halogen-free flame-retardant flexible power cable. The high-performance halogen-free flame-retardant flexible power cable comprises a core layer, an insulating layer, a flame-retardant layer, a shielding layer and a protective layer which are arranged in sequence, the flame-retardant layer is prepared from the following raw material components in parts by weight: 30 to 40 parts of ethylene-vinyl acetate copolymer, 10 to 20 parts of polyolefin elastomer, 8 to 10 parts of microencapsulated ammonium polyphosphate, 2.5 to 4.5 parts of pentaerythritol, 20 to 30 parts of inorganic flame retardant, 5 to 8 parts of expansible graphite, 2 to 3 parts of diatomite, 0.5 to 1.5 parts of nano kaolin, 2 to 3 parts of zinc borate, 0.1 to 0.5 part of antioxidant and 0.5 to 1.0 part of lubricant. The cable provided by the invention not only has good flame retardant property, but also has certain flexibility.

The invention discloses a heat dissipation opening and closing type power cable which comprises a cable insulating layer, an external sleeving layer, a cable shell and a heat dissipation opening and closing assembly. The dual-operation mode of heat dissipation and closed protection can be achieved, adjustment is conducted through different temperatures, flexible heat dissipation can be conducted at high temperature in summer, closed protection can be conducted at low temperature in winter, and it is avoided that rain and snow enter and freeze the interior; the adjusting ring rotates and drives the multiple movable battens to move in the heat dissipation cavity in the radial direction, when the adjusting ring rotates and enables the inner side of the adjusting ring to abut against the multiple movable battens to move inwards in the radial direction, the opening and closing blocks can be disengaged from the opening and closing holes, and heat dissipation is conducted through the heat dissipation holes, the heat dissipation cavity and the opening and closing holes; when the adjusting ring rotates and enables the closed spring column to eject the movable batten to move towards the outer side, the multiple opening and closing blocks are inserted and closed in the opening and closing holes one by one, so that closed protection is achieved, and flexible adjustment can be conducted.

The utility model discloses an intelligent early warning cable, which comprises a power line insulation wire core arranged in a first belting layer, the power line insulation wire core comprises a conductor and an insulation layer coated outside the conductor, and a temperature measuring element is arranged in the conductor; an armor layer is arranged outside the first belting layer, and a vibration measuring element is arranged in the armor layer; and an isolating layer is arranged between the first belting layer and the armor layer. The temperature measuring element with the temperature measuring function is arranged on the outermost layer of the conductor, so that the temperature of the cable conductor can be monitored more accurately; the vibration measurement element with the vibration measurement function is arranged in the armor layer, and the isolation layer is arranged between the first belting layer and the armor layer, so that an electromagnetic field generated by the cable in the first belting layer under the conditions of high voltage and large current can be isolated, and the problem that the electromagnetic field interferes optical signal transmission in the vibration optical fiber is avoided; the vibration signal can be accurately detected, and the detection accuracy is prevented from being influenced by deviation.

The utility model belongs to the technical field of cable manufacturing, and particularly relates to a protective wire cable. The cable comprises a plurality of electric conductors, a filling layer wrapping the electric conductors, an inner sheath wrapping the filling layer, an outer sheath wrapping the inner sheath, and an armored structure arranged between the inner sheath and the outer sheath. Wherein a flame-retardant layer is arranged outside the electric conductor; and an anti-impact cavity structure is arranged between two adjacent electric conductors in the circumferential direction. According to the cable, the flame-retardant layer is added, so that the cable can be effectively prevented from being burnt in a high-temperature environment, and large-area damage of the cable caused by internal combustion can be avoided, and the electricity utilization safety is guaranteed.

The invention discloses a large-current-carrying-capacity flexible power cable, which belongs to the technical field of cable preparation, is used for solving the technical problem that the flame retardant property and the mechanical property of the power cable need to be further improved in the prior art, and specifically comprises a cable core, a wrapping layer, an insulating layer and a sheath layer which are sequentially arranged from inside to outside. The preparation method comprises the following steps: preparing alkoxy silane containing a benzocyclobutene group, preparing flame-retardant particles by using a sol-gel method, preparing modified polyurethane by using modified polysiloxane and 2, 5-furandimethanol as soft segments, naphthalene diisocyanate as a hard segment and trimethylolpropane as a chain extender, and preparing the flame-retardant flame-retardant polyurethane. The linear low-density polyethylene, the MAH-g-PE, the modified polyurethane, the flame-retardant particles and the auxiliary additive are melted and extruded outside the wire core to form the insulating layer, so that the power cable is obtained, the flame-retardant property of the power cable is effectively improved, and the mechanical property and the current-carrying stability of the power cable are also improved.

The invention provides a wire and cable and a production and processing technology thereof, and belongs to the technical field of wires and cables, the wire and cable specifically comprises a plurality of wires, an insulating layer and a protective layer, the two ends of the plurality of wires are aligned and gathered together, the insulating layer wraps the wires, the protective layer wraps the insulating layer, and the protective layer wraps the insulating layer. The insulating layer is made of supercritical foaming materials, and the protective layer is made of light high-strength polymers. Through the processing scheme provided by the invention, the laying efficiency of the wires and cables is improved.

The invention discloses a new energy cable for power transmission, and relates to the technical field of cables, the new energy cable for power transmission comprises an anti-corrosion sleeve, a neck bush is installed in the anti-corrosion sleeve, a conductor is arranged in the neck bush, a sealing and butt joint mechanism is arranged on the outer side of the anti-corrosion sleeve, and the sealing and butt joint mechanism comprises a reinforcing ring sleeve. The device is scientific and reasonable in structure and safe and convenient to use, a sealing and butt joint mechanism is arranged, a positioning buckle is driven to move to the outer side of the reinforcing ring sleeve through traction of a traction baffle ring, and through cooperation of a positioning shaft seat, an anti-deviation supporting rod and an opening and closing sliding block, the anti-deviation supporting rod is fixed to the outer side of the anti-deviation supporting rod, and the anti-deviation supporting rod is fixed to the outer side of the anti-deviation supporting rod. The two positioning buckles are attached together in a sliding mode to form an annular buckle, the annular buckle is connected into the reinforcing ring sleeve in a sleeved mode, the splicing inserting rod is embedded into the positioning groove, and then the sealing buckle is pulled to move through cooperation of the limiting rotating cylinder, the telescopic sleeve rod and the positioning shaft base.

The invention relates to the technical field of cables, and provides a flame-retardant medium-voltage power cable and a preparation method thereof. The flame-retardant medium-voltage power cable comprises a conductor and a flame-retardant layer, the flame-retardant layer is prepared from the following raw materials in parts by weight: 65 to 75 parts of ethylene-vinyl acetate copolymer, 25 to 35 parts of polyolefin elastomer, 10 to 12 parts of maleic anhydride grafted polyethylene, 10 to 14 parts of phosphorus-nitrogen modified wollastonite, 8 to 10 parts of polydopamine / silane double-layer modified magnesium hydroxide, 3 to 5 parts of nano zinc borate, 0.6 to 1 part of antioxidant and 0.5 to 0.7 part of calcium stearate. According to the flame-retardant medium-voltage power cable prepared in the invention, the flame-retardant performance is improved, and the flame-retardant stability of the cable is also improved.

The invention relates to the technical field of power cables, and provides an environment-friendly ultrahigh-voltage cross-linked polyethylene insulated power cable, which comprises an insulated cylinder, a hollow cooling pipe, a metal protection layer, an alarm sounding group, an outer sheath, a male butt joint group and a female butt joint group, one side of each power conductor is provided with a plurality of heat conduction assemblies capable of cooling the power conductor, the heat conduction assemblies are located in the insulating column body, the hollow cooling pipe is arranged in the insulating column body in a penetrating mode and located among the power conductors, and the heat conduction assemblies are all communicated with the hollow cooling pipe; a protection groove is formed in the outer surface of the insulation column body, the metal protection layer is arranged in the protection groove in a sleeved mode, and the multiple alarm sound production sets are arranged. According to the technical scheme, the problem that an environment-friendly ultrahigh-voltage cross-linked polyethylene insulated power cable in the prior art is low in heat dissipation efficiency is solved.

The invention relates to the technical field of power cables, and provides a corrosion-resistant insulated power cable which sequentially comprises a conductor, an insulating layer and a sheath layer from inside to outside, and the sheath layer comprises the following raw materials in parts by weight: 70-80 parts of polyethylene, 20-25 parts of polyvinyl chloride, 10-15 parts of filler, 6-8 parts of a compatilizer, 1-3 parts of a plasticizer, 0.5-1.5 parts of an antioxidant, 1-2 parts of a lubricant and 1-2 parts of a cross-linking agent. The filler comprises the following raw materials in parts by weight: 60-70 parts of talcum powder, 30-40 parts of kaolin and 8-10 parts of a nitrogen-containing fluorinated aromatic compound. According to the technical scheme, the problem of poor corrosion resistance of the insulated power cable in the prior art is solved.

The invention relates to a 10-gigabit photoelectric composite cable for communication. The 10-gigabit photoelectric composite cable comprises a first coating station, a second coating station and a performance testing station which are sequentially arranged in the cable transmission direction. The first coating station is provided with a first protection mechanism used for installing the armor on the inner layer of the composite cable. The second coating station is provided with a second protection mechanism used for installing and fixing water absorption particles. The performance test station is provided with a detection mechanism used for cooling the cable and detecting the integrity of the outer layer of the composite cable. By arranging the first protection mechanism and the second protection mechanism, the technical problems that the cable armor layer is prone to dislocation and the damaged position cannot be quickly found after the cable is damaged are solved.

The invention relates to a flame-retardant fireproof power cable for photovoltaic power generation in the field of cables, which comprises a wire core, the outer end of the wire core is fixedly connected with a flame-retardant filling layer, the outer end of the flame-retardant filling layer is provided with a plurality of uniformly distributed threading grooves, a reinforced wire harness is arranged in the threading grooves in a penetrating manner, and the reinforced wire harness comprises a main reinforced wire. The main reinforcing line is fixedly connected with a plurality of uniformly distributed air inflation bag pipes, and heat conduction films are wrapped between the main reinforcing line and the air inflation bag pipes; an outer insulating layer covered with a flame-retardant filling layer is coated among the plurality of reinforced wire harnesses, a corrugated protective sleeve is sleeved on the outer insulating layer, and a plurality of uniformly distributed fixing bolts are connected between the corrugated protective sleeve and the reinforced wire harnesses; flame-retardant protection and buffer protection are carried out on the wire core through the reinforced wire harness, quick response and carbon dioxide release can be carried out for flame retardance when the reinforced wire harness is on fire, and real-time monitoring of the temperature inside and outside the cable can be assisted, so that online monitoring of the cable is facilitated.

The invention relates to the technical field of photoelectric composite cables, in particular to a cold-resistant tensile photoelectric composite cable and a rapid laying method thereof, and the cable comprises a conductor part, an insulating layer, an optical fiber unit, a filling layer and an outer sheath which are coaxially arranged from inside to outside and are sequentially wrapped. The conductor part is formed by twisting a plurality of strands of copper wires, a carbon fiber reinforced core is arranged in the conductor part, and the insulating layer is made of EAA and PEBA blending modified materials and contains nano boron nitride particles; the optical fiber unit is of a PBT loose tube structure, a plurality of single-mode optical fibers and special ointment are arranged in the PBT loose tube structure, micro-nano protrusions are arranged on the inner wall of a loose tube, and the surface of each micro-nano protrusion is covered with a silicon dioxide antireflection film. The cable integrates the functions of cold resistance, stretch resistance, electric conduction, insulation, communication, heat dissipation and protection. The insulating layer adopts EAA and PEBA blending modified materials to be combined with nano boron nitride particles, so that the cold resistance and the insulativity are improved; and the polyurethane elastomer of the filling layer is compounded with the glass beads, so that the structural stability and the comprehensive performance are enhanced.

The invention relates to the technical field of cables, and discloses an anti-ultraviolet outdoor cold-resistant power cable adapting to day and night temperature difference. The device is provided with the polyurea sealing micro-capsules, the hexagonal cells, the micro-capsule elastic pieces and the stretching structures, in a low-temperature environment, the polyurea sealing micro-capsules contract, at the moment, the micro-capsule elastic pieces lose supporting force and begin to release elastic potential energy, the hexagonal cells deform and begin to expand outwards, and when the hexagonal cells expand outwards, the trough positions of the stretching structures are pushed to expand outwards; the stretching structure is gradually stretched into a cylindrical outline from a corrugated shape, under the external expansion action of the hexagonal cells and the stretching structure, the cable sheath layer is promoted to actively expand to offset shrinkage stress, the problem of low-temperature embrittlement is effectively avoided, meanwhile, the design of the corrugated structure is used for coping with axial shrinkage of the cable sheath layer, and the tensile strength of the cable sheath layer is improved. The cable is divided into a plurality of independent units by the cable separation rings, the overall axial shrinkage is decomposed into local small-amplitude shrinkage of each unit, and cable distortion and cable insulation layer cracking caused by shrinkage stress accumulation are avoided.

The invention relates to the technical field of cables, in particular to a composite low-voltage power cable. In the long-term compression and impact process of the existing cable, the cable core structure is easy to deform and damage, the resistance of a conductor is abnormally increased, and the risk of power supply interruption is obviously increased. Comprising a protective sleeve, an armor layer is installed in the protective sleeve, and a plurality of supporting blocks and a plurality of cable cores are arranged in the armor layer; the protective sleeve is provided with a plurality of first cavities distributed at equal intervals in the circumferential direction, and the first cavities are used for providing a movement range for deformation of the protective sleeve and facilitating dislocation rotation of the inner side faces and the outer side faces of the first cavities in the deformation process. According to the invention, through the movement space provided by the first cavity, the extrusion of a heavy object is buffered, and the extrusion of the heavy object is guided to be staggered, so that the impact force borne by a cable core is reduced; and through a multi-layer composite structure formed by the protective sleeve and the armor layer, the use strength of the cable is improved.

The invention relates to the technical field of power cables, and provides a marine power cable which comprises a conductor, an insulating layer, an armor layer and a sheath layer are sequentially arranged on the outer side of the conductor, and the sheath layer is prepared from, by weight, 40-50 parts of polyethylene, 35-45 parts of methyl vinyl silicone rubber, 30-40 parts of nitrile rubber, 8-10 parts of plasticizer, 40-60 parts of filler, 1-2 parts of antioxidant and 1-3 parts of vulcanizing agent; the nitrile rubber is composed of nitrile rubber A, nitrile rubber B and nitrile rubber C, and the nitrile rubber A, nitrile rubber B and nitrile rubber C have different molecular structures; the nitrile rubber A is obtained by polymerizing butadiene and acrylonitrile; the nitrile rubber B is obtained by catalytic hydrogenation of nitrile rubber; and the nitrile rubber C is obtained by ternary polymerization of butadiene, acrylonitrile and organic acid. According to the technical scheme, the problem of poor corrosion resistance of the marine power cable in the prior art is solved.

The invention relates to the technical field of power cables, and provides a cross-linked polyethylene insulated power cable with an anti-seismic function, which comprises a cable body, the cable body is composed of a plurality of stranded wires, an insulating layer is arranged outside each wire, a filling layer and a belting layer are sequentially arranged outside the plurality of wires, and the insulating layer is arranged outside the plurality of wires. The cable comprises a cable body and further comprises a sheath layer, fixing seats, upper fixing frames, supporting assemblies and buffering assemblies, the sheath layer comprises an inner sheath and an outer sheath, the cable body is provided with a plurality of fixing seats, each fixing seat is provided with one upper fixing frame, the supporting assemblies are arranged between each fixing seat and the corresponding upper fixing frame, each fixing seat is provided with one buffering assembly, and the buffering assemblies are arranged on the supporting assemblies. According to the technical scheme, the problem that in the prior art, when a cross-linked polyethylene insulated power cable is arranged near a factory workshop or in a tunnel or other positions where vibration is likely to be generated, vibration can affect the cable through the ground or a supporting structure, and the cable is damaged is solved.