972results about "Power cables" patented technology

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 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 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 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 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 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 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.

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

The invention relates to the technical field of power cables, in particular to a cross-linked polyethylene insulated power cable wrapped by a high-water-resistance buffer layer and a preparation method of the cross-linked polyethylene insulated power cable wrapped by the high-water-resistance buffer layer, and the cross-linked polyethylene insulated power cable is prepared from the following raw materials in parts by weight: 100 parts of ethylene-vinyl acetate copolymer; 15 to 25 parts of conductive carbon black; 20 to 30 parts of sodium polyacrylate; and 10 to 15 parts of nano montmorillonite. Through the high-water-resistance buffer layer and innovative process design, the problems existing in a traditional cable are solved, and the water-resistance layer effectively blocks a water permeation path through composite water absorption and a nano barrier; nitrogen doping and dispersion optimization of conductive carbon black ensure the stability of resistivity; a plasma interface activation and microcapsule cross-linking technology improves interlayer bonding force and cross-linking uniformity, gradient degassing and low-temperature cross-linking are adopted in the preparation process, the production cycle is shortened, energy consumption is reduced, meanwhile, material degradation is avoided, the cable has high water resistance and long service life, and reliability and safety of power grid operation are remarkably improved.

The invention discloses a photovoltaic cable resistant to high temperature and long in service life and a preparation method thereof, and relates to the technical field of power cables, a Y-shaped plate is connected between the top ends of two adjacent arc-shaped plates, the Y-shaped plate is located in a gap between two adjacent conductors, and a limiting groove is welded to the outer side of a supporting sleeve and located between the two adjacent arc-shaped plates. According to the cable, when the cable burns, the expanded graphite expands, the expanded graphite is diffused into the diffusion opening, the silicone rubber layer is made of a ceramic silicone rubber material, so that the cable is not prone to cracking, and the cable is not prone to cracking, so that the service life of the cable is prolonged, the service life of the cable is prolonged, and the service life of the cable is prolonged. The ceramic silicone rubber can be quickly hardened into a hard ceramic shell after being burnt, so that expanded graphite is tightly stacked between the ceramic shell and the outer side of the conductor, the expanded graphite carbon layers stacked layer by layer are matched with the flame-retardant plate, flame is fully prevented from spreading towards the interior of the cable which is not burnt, and the flame-retardant effect of the cable is good.

The invention relates to the technical field of power cables, and provides a moisture-proof safe cross-linked polyethylene insulated power cable, which comprises a plurality of metal conductors, insulating tube layers arranged on the outer sides of the plurality of metal conductors, insulating cylinder layers arranged among the outer sides of the plurality of insulating tube layers, a closed sleeve and a connecting sleeve, the closed sleeve is arranged on one side of the insulating cylinder layer, the closed sleeve is used for keeping closed between the insulating cylinder layer and the plurality of insulating tube layers, a plurality of sealed tube sections are communicated with the closed sleeve, the sealed tube sections are in one-to-one correspondence with the metal conductors, the metal conductors are moved into the sealed tube sections, and the metal conductors are moved out of the closed sleeve through the sealed tube sections; the connecting sleeve is arranged on one side of the sealing pipe section in a sealed mode. According to the technical scheme, the problem that in the using process of a cross-linked polyethylene insulated power cable in the prior art, a connecting area of a metal conductor and power equipment is prone to being affected with damp due to installation reasons is solved.

The invention relates to the technical field of cables, and provides a low-voltage power cable which sequentially comprises a conductor, an insulating layer, a lining layer, an armor layer and a sheath layer from inside to outside. The armor layer is formed by winding two layers of parallel steel belts outside the cable lining layer in a spiral or longitudinal wrapping manner; the conductor is formed by twisting tinned copper wires; the sheath layer is a polyvinyl chloride resin sheath layer.

The utility model discloses a ceramic environment-friendly insulating fireproof low-voltage cable, which comprises a cable core, six wire cores which are annularly and spirally wound and distributed are arranged in the cable core, and a plurality of gradient ceramic layers are arranged outside the wire cores. The multi-layer gradient ceramic layer is formed by stacking a base layer, a fireproof layer and a stable layer with different ceramic temperatures layer by layer, the ceramic temperature of an inner layer material is low, the ceramic temperature is gradually increased along with advancing towards an outer layer, a wrapping layer is arranged outside the multi-layer gradient ceramic layer, the wrapping layer is composed of a wrapping inner layer, an enhancement layer and a protection layer, and the protection layer is arranged outside the wrapping inner layer. And an environment-friendly degradable outer sheath is arranged outside the wrapping layer. According to the scheme, the problem that the low-voltage cable is poor in fireproof performance is solved.

The invention relates to an insulating material, in particular to a nano composite insulating material, an insulated cable and an insulation defect repairing robot. The nano composite insulating material comprises core-shell particles, modified montmorillonite and crosslinked polyethylene, wherein each core-shell particle is provided with a core layer and a shell layer. The insulating layer of the insulated cable is made of the nano-composite insulating material. The insulation defect repairing robot can utilize the insulation defect repairing material to repair the crack defect of the insulation layer of the related cable. The material can automatically repair cracks under the action of an electric field and a thermal field, repeated repair for more than five times is achieved, micro defects smaller than or equal to 100 microns can be automatically repaired in the cable operation process, 90% of unplanned power failure faults are reduced, and the whole life cycle fault cost is reduced by 60%.

The utility model discloses a water-blocking buffer power cable protection structure which comprises a wire core conductor, a sleeve layer is arranged on the outer side of the wire core conductor, a wrapping layer is arranged on the opposite outer side of the wire core conductor, buffer sleeves are annularly arranged on the sleeve layer at intervals, the interior of each buffer sleeve is hollow to form a buffer cavity, a water-blocking pad is circumferentially arranged along the outer side of the wrapping layer, and the water-blocking pad is arranged on the outer side of the wrapping layer. And the outer sleeve layer is close to the outer sleeve layer and is locally embedded in the peripheral part of the wrapping layer. According to the utility model, the wrapping layer and the sleeve layer which are staggered and matched are sequentially arranged outside the wire core conductor, and the water-blocking pad is arranged on the sleeve layer close to the outer side and partially embedded at the periphery of the wrapping layer, so that the waterproofness of the power cable is effectively improved, and meanwhile, the water-blocking pad is matched with the buffer sleeves which are annularly arranged on the sleeve layer at intervals, so that the waterproof performance of the power cable is improved. Deformation force in different directions after the cable is twisted can be borne, the bending position of the power cable is protected, and the practicability of the cable is improved.

The invention relates to the technical field of cables, and provides a corrosion-resistant insulated power cable. The corrosion-resistant insulated power cable is sequentially provided with a conductor layer, an insulating layer and a sheath layer from inside to outside, and the insulating layer is prepared from the following raw materials in parts by weight: low-density polyethylene, magnesium hydroxide and calcium carbonate composite powder, an antioxidant, dicumyl peroxide, zinc stearate and polyethylene wax; the sheath layer comprises the following raw materials in parts by weight: PVC resin, magnesium hydroxide and calcium carbonate composite powder, diisononyl phthalate, a calcium-zinc composite stabilizer, an antioxidant, polyethylene wax and calcium stearate. According to the corrosion-resistant insulated power cable prepared in the invention, the corrosion resistance of the power cable in extreme corrosion environments such as strong acid, strong alkali, high-concentration salt mist and the like is improved, and the condition that a common cable sheath is easy to expand and crack in the extreme corrosion environments is improved.

The invention relates to the technical field of cables, in particular to an aluminum alloy cable which is composed of an aluminum alloy conductor, an inner insulating layer, a fireproof wrapping tape layer and an outer sheath. The outer sheath is prepared from the following raw materials in parts by weight: 50 to 60 parts of ethylene-vinyl acetate copolymer, 20 to 30 parts of linear low density polyethylene, 10 to 20 parts of polyolefin elastomer, 5 to 10 parts of PPO-g-MAH, 20 to 30 parts of carbon black, 1 to 10 parts of organic phosphorus flame retardant, 20 to 30 parts of crusting agent and 1 to 3 parts of antioxidant; the aluminum alloy cable provided by the invention is light in weight, high in strength and excellent in fireproof and flame-retardant performance.

The invention relates to the technical field of fire-resistant cables, and particularly discloses a high-flame-retardant and high-fire-resistant cable which is composed of a conductor, an insulating layer formed by magnesium oxide particles and an outer sheath, a spiral cavity is formed between the conductor and the outer sheath, the spiral cavity is formed by at least one spirally-wound insulating tape, and the insulating tape is arranged between the conductor and the outer sheath. The spiral cavity is filled with magnesium oxide particles and is compacted, the insulating tape is a high-temperature-resistant flexible mica tape, the mica tape is formed by compounding synthetic mica paper or phlogopite paper and alkali-free glass fiber cloth, and the spiral cavity formed by the spirally wound composite mica tape limits the displacement of the magnesium oxide particles. The inclined winding of the insulating tape constructs a support system with a stable structure and uniform pressure distribution, greatly improves the deformation resistance of the insulating layer under dynamic mechanical stress, effectively guarantees the integrity of an insulating medium, and effectively solves the technical problem that a magnesium oxide layer in a traditional mineral insulated cable is easy to loosen.

This power cable is provided with: a conductor; and an insulating layer that is provided so as to cover the outer periphery of the conductor and that is configured from a resin composition containing polyethylene. The insulating layer contains, among polyethylene, a crosslinked polyethylene that is insoluble in xylene at 120° C, and uncrosslinked polyethylene that can be eluted in xylene at 120° C. The uncrosslinked polyethylene has a number average molecular weight of 5000 to 25000.

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

The invention relates to the technical field of power cables, and particularly discloses a cable with a cable insulation layer and a preparation method thereof, and the cable comprises a conductor and an insulation layer wrapping the conductor. The preparation method comprises the following steps: S1, raw material pretreatment: preheating and softening the high-strength silicone rubber in a temperature interval of 120-150 DEG C; s2, a mixing procedure: adding an aluminum hydroxide flame retardant and ethylene-vinyl acetate copolymer resin into the pretreated high-strength silicone rubber; and S3, extruding and coating: applying the mixed composite material to the periphery of a conductor through an extruder, and controlling the extrusion temperature to be 140-170 DEG C. The cable can be used for power transmission in a high-temperature environment, and has the advantages that the flexibility and tear resistance are maintained in the high-temperature environment, and meanwhile, the long-term thermal stability is improved; in addition, the preparation method disclosed by the invention has the advantages of improving the compatibility of the filler and the matrix and improving the mechanical property of the cable.

The invention provides a heat dissipation flexible cable. The heat dissipation flexible cable comprises an inner sheath, a heat dissipation assembly, a separation assembly, a plurality of battery cell assemblies and a plurality of sliding assemblies, the inner sheath is provided with an accommodating cavity; the heat dissipation assembly is arranged around the periphery of the inner sheath; the separation assembly is located in the containing cavity and comprises a center piece and a plurality of separation pieces, the separation pieces are arranged around the periphery of the center piece, and a core cavity is formed between any two adjacent separation pieces; the battery core assemblies are located in the corresponding core cavities, each battery core assembly comprises an electric unit, a thermal expansion structure and a first elastic piece, and one side of each electric unit is elastically connected to the inner sheath through the corresponding first elastic piece; the plurality of sliding assemblies are arranged corresponding to the plurality of separators, the sliding assemblies are slidably arranged on the separators corresponding to the sliding assemblies, and the sliding assemblies are configured to install optical units; the thermal expansion structure is configured to be heated to drive the electric unit and the sliding assembly to move towards one side of the inner sheath to abut against the inner sheath, and the heat dissipation assembly can dissipate heat of the electric unit and the optical unit through the inner sheath.