375 results about "Cross-linked polyethylene" patented technology

In some embodiments, a cable can include an electrically conductive inner core. A first insulation layer can be disposed about the inner core. An electrically conductive layer can be disposed about the first insulation layer. A second insulation layer can be disposed about the electrically conductive layer. A first polymer jacket can be disposed about the second insulation layer. The first polymer jacket can include a first layer of armor strength members disposed therein. A second polymer jacket can be disposed about the first polymer jacket. The second polymer jacket can include a second layer of armor strength members disposed therein. An outer polymer jacket can be disposed about the second polymer jacket. At least one of the first polymer jacket, the second polymer jacket, and the outer polymer jacket can be formed from an aliphatic polyketone polymer, an ethylene-propylene copolymer, a polyolefin elastomer, a polypropylene, or a cross-linkable polyethylene.

The invention relates to the technical field of crosslinked polyethylene insulated power cables, in particular to a flame-retardant and insulated low-voltage power cable and a preparation method and application thereof. The flame-retardant and insulating low-voltage power cable comprises the inner core layer, the filler layer, the belting layer, the lining layer, the metal armor layer and the outer sheath layer from inside to outside, and the multiple layers can effectively protect the inner core and endow the cable with better performance; in addition, low-density polyethylene, a furan modified polyethylene compatilizer, a reactive flame retardant, bismaleimide, dicumyl peroxide and an auxiliary are adopted to obtain the cross-linked polyethylene material for the cable outer sheath, and the cross-linked polyethylene material has excellent insulation, flame retardance, strength, toughness and repairing performance.

The invention relates to the technical field of power cables, and provides a crosslinked polyethylene aluminum alloy cable with a reinforcing structure, which comprises a cable body, the cable body is erected on a plurality of cable brackets, a plurality of conductors which are arranged in a stranded manner are arranged in the cable body, and a crosslinked polyethylene insulating layer is coated outside each conductor. A filling layer is arranged between every two conductors, a belting layer is wrapped outside the filling layer, the cable further comprises a reinforcing layer, a braid layer, a sheath layer and a flexible supporting structure, the reinforcing layer is wrapped outside the belting layer, the braid layer and the sheath layer are sequentially wrapped outside the reinforcing layer, and the flexible supporting structure is installed on the cable support. The problems that in the prior art, due to the influence of the weight of a cable, as time goes on, the cable is bent downwards, and when bending reaches the limit, the internal structure of the cable is prone to deformation and damage due to excessive stretching are solved.

Multi-ply structures incorporating adhesive compositions, products produced from such structures, and methods of producing the structures.

The invention relates to the technical field of cable production, and discloses a new energy charging heat-conducting flame-retardant cable which sequentially comprises a conductor layer, a heat-conducting insulating layer, a self-healing layer, a shielding layer, a mechanical enhancement layer and a flame-retardant outer sheath layer from inside to outside. The conductor layer is formed by a plurality of stranded tin-plated copper wires or nickel-plated copper wires; the heat-conducting insulating layer is composed of a crosslinked polyethylene matrix, a two-dimensional heat-conducting filler and phase-change temperature-adjusting microcapsules, the two-dimensional heat-conducting filler comprises a mixture of boron nitride nanosheets oriented by an electric field and graphene, and the mass fraction of the filler is 40%-55%; a core material of the phase-change temperature-adjusting microcapsule is a compound of paraffin and stearic acid. According to the scheme, trace rare earth and silver elements are introduced into the conductor to form a Cu-Ag-RE solid solution structure, so that the crystal integrity and the oxidation resistance of the conductor are remarkably improved; the structure still keeps excellent conductivity and bending resistance at high temperature, so that the cable can stably operate for a long time in a high-temperature and strong ultraviolet environment during charging, and the conductivity efficiency is improved.

The invention discloses an anti-torsion cross-linked polyethylene insulated power cable applied to the field of cables, which comprises a petal framework composite structure comprising hollow strips, a main support layer and a buffer layer, and an outer layer protection structure formed by branch protection rings and an elastic metal net. The problems that in the prior art, a cable is prone to structural damage and performance degradation under the torsion working condition are solved, a main supporting layer in a petal framework disperses torsion stress through deformation, a buffer layer absorbs impact energy, a hollow supporting layer provides structural rigidity, and the main supporting layer, the buffer layer and the hollow supporting layer form an elastic supporting-buffer energy absorption-rigid stability synergistic system; therefore, the cable with the petal framework composite structure has excellent torsion resistance. And meanwhile, dynamic heat dissipation and temperature regulation and control are realized through fluid circulation of the hollow supporting layer and the sensing array, and the structural integrity and transmission stability of the wire core under complex working conditions are guaranteed.

The application relates to the technical field of power cables, and discloses a coal mine-used cross-linked polyethylene insulated power cable and a preparation method thereof. The coal mine-used cross-linked polyethylene insulated power cable comprises, from inside to outside, a cable core, an inner lining layer, an armoring layer and an outer sheath layer. The cable core comprises, from inside to outside, a conductor, a conductor shielding layer, a cross-linked polyethylene insulation layer and an insulation shielding layer. The outer sheath layer comprises the following components in parts by weight: 55-70 parts of polyvinyl chloride, 15-30 parts of thermoplastic polyurethane, 12-18 parts of a plasticizer, 0.3-0.5 parts of an antioxidant, 0.8-1.6 parts of a lubricant, 15-20 parts of a filler, 1-3 parts of maleic anhydride grafted polyethylene and 0.5-1.0 parts of a coupling agent. The filler comprises perlite loaded yttrium and tin composite oxides. The above technical scheme solves the problem of insufficient flame retardance of the coal mine-used cross-linked polyethylene insulated power cable in the prior art.

The invention discloses a production method of a high-structural-strength insulating steel tape armored multi-core power cable. The power cable comprises a conductor unit and an insulating layer from inside to outside, wherein the conductor unit is formed by twisting and pressing a conductor with a copper base material, the conductor unit is wrapped outside the conductor, the overlapping rate of the conductor unit is larger than or equal to 50%, and the insulating layer is formed by semi-conductive ceramic silicone rubber and / or crosslinked polyethylene. The double-layer wrapping tape is composed of ceramic silicone rubber filling strips and assists the insulating core wires to be twisted into a cable and is of a filling structure; an inner sheath made of a ceramic silicone rubber material; the composite armor layer is composed of an inner-layer galvanized steel band and an outer-layer stainless steel band; the buffer layer is composed of an aramid fiber woven mesh or a ceramic fiber belt; and the outer sheath is composed of ceramic silicone rubber or a low-smoke halogen-free flame-retardant material of which the oxygen index is greater than or equal to 40. The cable is high in structural strength, good in temperature resistance and high in impact resistance, high-temperature mechanical locking is achieved through tension-controlled double-layer reverse wrapping, and the performance of the cable is greatly improved.

The invention relates to the technical field of insulated cables, and provides a high-temperature-resistant cross-linked polyethylene insulated cable for a charging pile, which comprises a cable body, the cable body comprises a plurality of conductors arranged in a stranded manner, each conductor is coated with a cross-linked polyethylene insulating layer, a wrapping layer is arranged outside the plurality of conductors, a filling layer is arranged in the wrapping layer, and the cross-linked polyethylene insulating layer is arranged in the filling layer. The cable further comprises a sheath layer, flexible water supply pipes, flexible water return pipes and a circulation assembly, the sheath layer is arranged outside the wrapping layer in a wrapping mode and used for resisting mechanical damage, the flexible water supply pipes are arranged in the filling layer, the flexible water return pipes are arranged in the filling layer in a twisted mode, and the circulation assembly is arranged between the flexible water supply pipes and the flexible water return pipes. By means of the technical scheme, the problems that in the prior art, under the condition of long-time high-power charging, continuous high current can generate huge heat, so that a cable insulation layer is damaged due to high temperature, and the service life of a cable is affected are solved.

The invention relates to the technical field of cross-linked polyethylene insulated cables, and discloses an overhead insulated cable with an anti-icing coating, which comprises a cable core, an inner shielding layer, an insulating layer, an outer shielding layer, an inner sheath, an armor layer and other conventional structures, and is characterized in that a driving assembly and an anti-icing jacket assembly are arranged outside at equal intervals; the driving assembly is driven by the fixed ring, the rotating ring and the micro motor to drive the spiral twisting wire to be alternately tightened and loosened, so that the flexible twisting sleeve synchronously realizes radial wriggling and circumferential bidirectional torsion, the outer wall of the flexible twisting sleeve is provided with a V-shaped axial twisting groove, and the outer wall of the flexible twisting sleeve is coated with a compound anti-icing coating; according to the scheme, a bonding interface for breaking an ice blank and the surface of the cable at the initial stage can be formed on an ice shell, a thin water film is quickly discharged to block an icing core, and the hydrophobic and ice-hydrophobic characteristics of the coating are matched, so that ice layer growth circulation is cut off from the source, icing thickening is effectively inhibited, and safety accidents caused by large-scale icing are avoided; and the operation reliability of the aerial cable in the freezing rain, high-humidity and low-temperature environment is improved.

The invention relates to the technical field of power cables, and provides a compression-resistant wear-resistant cross-linked polyethylene insulated power cable, which comprises a cable body, the cable body is formed by twisting a plurality of conductors arranged in a twisting manner, and the plurality of conductors arranged in the twisting manner are coated with a belting layer. The cable further comprises cross-linked polyethylene insulating layers, a filling layer, a sheath layer, a butt joint assembly and a compression-resistant protection assembly, each conductor is coated with the cross-linked polyethylene insulating layer, the filling layer is arranged in the belting layer, the sheath layer is arranged outside the belting layer, the butt joint assembly is arranged between the two sections of cable bodies, the compression-resistant protection assembly is installed on the butt joint assembly, and the compression-resistant protection assembly is installed on the butt joint assembly. According to the technical scheme, the problem that in the prior art, after the cable is laid, due to the fact that the backfill soil is not tamped in a layered mode, uneven pressure is generated on the trench wall and the cover plate by the soil, the cable is pressed, and the possibility of cable damage is increased is solved. And thus, the cable is easier to be mechanically damaged.

The utility model discloses a new energy automobile copper clad aluminum braided shield high voltage cable in the technical field of high voltage cable, including stranded copper conductor, the fixed extrusion of insulating layer has on the outer wall of stranded copper conductor, the insulating layer is cross -linked polyethylene or cross -linked polyolefin insulating layer, the insulating layer outside fixedly set semiconductive inner layer, fill in the PP filling strip between semiconductive inner layer with insulating layer, the outer wall of semiconductive layer extrudes and has copper clad aluminum braided shield layer, copper clad aluminum braided shield layer is 0.1~0.2 tinned copper clad aluminum wire, and with semiconductive inner layer is 360 degree ring pressure contact, the outer wall of copper clad aluminum braided shield layer fixed extrusion has aluminum foil layer, the outer wall of aluminum foil layer fixed extrusion has semiconductive outer layer, the outer wall of semiconductive outer layer fixed extrusion has cross -linked polyolefin sheath, the utility model discloses can reduce the shielding layer direct current resistance, guarantees the continuity of grounding, promotes high -frequency shielding efficiency, strengthens in 100kHz~30MHz frequency band shielding attenuation.

The invention discloses an insulation detection method for cable windings of a phase modifier, and relates to the field of phase modifiers, and the method comprises the following steps: S1, sequentially embedding an A-phase cable, a B-phase cable and a C-phase cable into iron core grooves of a stator iron core to respectively form a corresponding A-phase winding, a B-phase winding and a C-phase winding, and the insulating layer of each phase cable is made of a crosslinked polyethylene material; s2, cable terminal connectors are mounted at the wire outlet end and the neutral end of each phase of winding and are grounded; s3, respectively carrying out insulation resistance detection test on each phase of winding; s4, respectively carrying out an alternating current withstand voltage test on each phase of winding; and S5, respectively carrying out dielectric loss factor detection test on each phase of winding. The device can detect the insulation performance of the cable winding of the direct-hanging phase modifier, and has the advantages of comprehensive detection and high reliability.

The invention relates to the technical field of cables, in particular to a torsion-resistant aluminum alloy cable which comprises a cable core composed of an aluminum alloy conductor, an isolation shielding layer and a crosslinked polyethylene inner sheath. The polyimide film is used for binding and fixing the plurality of cable cores; the outer layer of the polyimide film is sequentially coated with a copper strip wrapping shielding layer, a mica wrapping layer and an outer sheath layer. The outer sheath layer material has excellent mechanical properties and can effectively protect a conductor, and the prepared cable has good torsion resistance and fully meets multi-scene application requirements.

The invention relates to the technical field of cross-linked polyethylene insulated power cables, and provides a low-voltage fire-resistant cross-linked polyethylene insulated power cable, which comprises a conductor cable core, a flame-retardant mechanism, a heat dissipation buffer mechanism and an outer sheath, and is characterized in that the conductor cable core is sleeved with a cross-linked polyethylene insulating layer, the flame-retardant mechanism is sleeved on the cross-linked polyethylene insulating layer, and the heat dissipation buffer mechanism is sleeved on the outer sheath. The flame-retardant mechanism is internally provided with a plurality of miniature material storage assemblies capable of spraying a cooling flame retardant, the flame-retardant mechanism is sleeved with the heat dissipation buffer mechanism, the air supply cooling mechanism is detachably arranged on one side of the heat dissipation buffer mechanism in a sealed mode, and the heat dissipation buffer mechanism is sleeved with the outer sheath. According to the technical scheme, the problems that although a low-voltage fire-resistant cross-linked polyethylene insulated power cable in the prior art has certain fire resistance, the heat dissipation performance of the cable is further affected, and the heat dissipation efficiency is poor are solved.

The invention relates to the technical field of cross-linked polyethylene insulated cables, and provides a wear-resistant aluminum alloy cross-linked polyethylene insulated cable which comprises an aluminum alloy conductor, a cross-linked polyethylene insulating layer, an inner sheath and an outer sheath, the aluminum alloy conductor is wrapped with the cross-linked polyethylene insulating layer, a filler is arranged between the inner sheath and the cross-linked polyethylene insulating layer, and the outer sheath is arranged between the inner sheath and the cross-linked polyethylene insulating layer. The cable comprises an inner sheath and an outer sheath, the outer sheath wraps the inner sheath, the cable further comprises a plurality of movable protection structures and a key repairing structure, and the movable protection structures are detachably arranged outside the outer sheath, can slide in the axial direction of the outer sheath and are used for providing additional protection outside the outer sheath. The key repairing structure is detachably arranged outside the telescopic protective sleeve and used for conducting reinforced protection on the high-abrasion area of the telescopic protective sleeve. According to the technical scheme, the cable is used for solving the problem that the wear resistance of the cable in the prior art mainly depends on the material of the outer sheath, and the cable is still worn after long-term use.

The invention relates to the technical field of high-voltage cables, in particular to a crosslinked polyethylene insulated high-voltage direct-current cable, which is characterized in that an insulating layer contains a crosslinked polyethylene base material, a composite modifier, an antioxidant compound system, a nano nucleating agent, a tracking-resistant agent, a compatilizer and a smoke suppressant, the composite modifier is prepared by compounding an ethylene-vinyl acetate copolymer and a methyl methacrylate-butadiene-styrene copolymer, the antioxidant is prepared by compounding hindered phenol and phosphite ester, the nano nucleating agent is prepared from silane coupling agent KH-550 modified talcum powder and calcium carbonate, the tracking-resistant agent is prepared from melamine cyanurate and stearic acid activated magnesium hydroxide, and the lubricant is prepared from a lubricant and a lubricant. The compatilizer is maleic anhydride grafted polyethylene, and the smoke suppressant is compounded by ammonium molybdate and tin oxide. The components synergistically improve the flexibility, aging resistance and dielectric property of the insulating layer, the tracking resistance and smoke suppression are balanced, and the preparation process solves the problem of additive agglomeration, accurately controls the crosslinking degree, reduces the internal stress and improves the performance uniformity.

This invention relates to the field of overhead insulated conductor technology and proposes a high-strength overhead cross-linked polyethylene insulated conductor, comprising a conductor, an outer cross-linked polyethylene insulation layer, and an outer sheath layer. It also includes baffles, mounting bases, reinforcing components, anti-galloping components, and flexible positioning components. Several spirally arranged baffles are arranged on the outer side of the sheath layer. Several mounting bases are arranged on the outer side of the insulated conductor, divided into upper and lower mounting bases. A reinforcing component is installed between every two adjacent mounting bases, and several anti-galloping components are installed between every two adjacent mounting bases. The anti-galloping components are mounted on the sheath layer. A flexible positioning component is installed inside each mounting base, and the flexible positioning component contacts the sheath layer. This technical solution addresses the problem in the prior art where overhead conductors are easily damaged by galloping in strong winds.

This utility model relates to the field of cable insulation layer polishing technology, and discloses a copper core cross-linked polyethylene cable insulation layer polisher, including a motor, and further including: a polishing component for polishing the cable insulation layer, wherein the motor is provided with a mounting component and the polishing component is mounted on the mounting component; a support component for supporting the motor and the polishing component, wherein a column is mounted on the support component and a protective component is provided on the outside of the polishing component; this utility model achieves efficient polishing by driving a motor to drive a pulley to rotate the polishing belt; the support component allows for adjustment of the motor, enabling the motor to be freely adjusted in multiple directions to flexibly adapt to different polishing scenarios; the handle and grip facilitate operation by workers and greatly reduce the burden of manpower; the protective cover effectively blocks the polishing area and provides reliable safety protection for workers.

The invention relates to the technical field of wire and cable manufacturing, in particular to an anti-corrosion cable and a preparation method thereof, and the anti-corrosion cable comprises a conductor, an anti-corrosion isolating layer, an insulating layer, an armor layer and an outer sheath from inside to outside. The surface of the conductor is plated with an aminated graphene-nickel-phosphorus composite plating layer; the anti-corrosion isolating layer contains 30-40 parts of fluorine rubber, 10-15 parts of nano boron nitride-silicon dioxide core-shell particles and the like; the insulating layer contains 45-55 parts of crosslinked polyethylene, 8-12 parts of montmorillonite-carbon nanotube-graphene composite powder and the like; the armor layer is formed by compounding a basalt fiber-glass fiber composite filament woven mesh and a polyether-ether-ketone-polyimide composite film; and the outer sheath contains 25-35 parts of chlorinated polyethylene, 5-8 parts of nano titanium dioxide-cerium oxide composite powder and the like. The corrosion-resistant cable has the advantages of corrosion resistance, strong weather resistance, excellent electrical and mechanical properties, long service life and low maintenance cost, can stably operate for a long time in severe environments such as high salinity and high humidity, and is suitable for multi-corrosion scenes.

The application discloses a kind of temperature-resistant wear-resistant three-layer insulated wire and preparation method thereof, it is related to cable technical field.The preparation method of the application is: the surface of conductor material is extruded and packed inner layer material to form inner insulation layer, then the surface of inner insulation layer is extruded and packed modified silicone rubber to form middle layer, then the surface of middle layer is extruded and packed outer layer material to form outer insulation layer, and high-temperature-resistant flame-retardant cable material is obtained after curing.In which, inner layer material is made of low-density polyethylene, antioxidant 1010, insulation particle, voltage stabilizer and the like;Modified silicone rubber is made of silicone rubber, boron nitride compound, modified magnesium oxide and the like;Outer layer material is made of inner layer material, boron nitride compound.The introduction of insulation particle, voltage stabilizer, boron nitride compound and the like components effectively improves the high-voltage resistance, aging resistance, wear resistance and temperature resistance of crosslinked polyethylene insulated power cable wire.Therefore, the application has wide application prospect.

This invention discloses an acid and alkali resistant anti-corrosion coated cable structure, belonging to the field of cable technology. It includes a sheath, with a conductor connected to the inner wall of the sheath. The sheath comprises, from the inside out, an insulation layer, an anti-corrosion base layer, a composite anti-corrosion layer, a reinforcing layer, and a protective layer, arranged coaxially in sequence. The cross-linked polyethylene insulation layer ensures insulation performance. The polytetrafluoroethylene anti-corrosion base layer, combined with an epoxy glass flake + polyurethane composite anti-corrosion layer, forms a double acid and alkali resistant anti-corrosion barrier, effectively isolating corrosive media and preventing coating cracking and peeling, thus solving the problem of poor durability of traditional single-coating anti-corrosion. The aramid fiber reinforcing layer improves the cable's tensile and tear resistance, and the chlorinated polyvinyl chloride protective layer further enhances corrosion and abrasion resistance. The integrally formed anti-slip texture increases laying friction. The tin-plated oxygen-free copper wire stranded conductor has excellent conductivity and strong oxidation resistance. All layers are tightly bonded and sized appropriately, and the adhesive layer enhances interlayer bonding.

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.

This application relates to the field of cable manufacturing, specifically disclosing a manufacturing equipment and method for cross-linked polyethylene insulated cables used in mining. The manufacturing equipment includes a drawing machine body, and further includes: a drawing die, which is mounted on the drawing machine body and used for sizing and forming wire; a cooling and lubrication system, which includes: an oil supply mechanism for supplying lubricating oil to the forming hole of the drawing die and for cooling the drawing die; and a temperature control valve installed at the oil outlet of the oil supply mechanism, capable of automatically adjusting the flow area of ​​the oil outlet of the oil supply mechanism according to the temperature change of the drawing die. This application effectively improves the problems of poor lubrication and heat dissipation coordination, high energy consumption, and low heat dissipation efficiency of current drawing dies.

The invention belongs to the technical field of insulating sleeves, and particularly discloses a high-voltage alternating-current cross-linked polyethylene cable prefabricated terminal which comprises an outgoing line fitting, an anti-corona cover, a sleeve, a stress cone, a tail pipeline and an insulator, the anti-corona cover is arranged at the top end of the stress cone, the outgoing line fitting is installed at the top end of the anti-corona cover, and the tail pipeline is connected to the bottom end of the stress cone. The outer side of the stress cone is sleeved with a sleeve, the sleeve is filled with insulating oil, and the bottom end of the stress cone is connected with the bottom frame through a plurality of insulators. The bottom end of the stress cone is installed on the bottom plate through a plurality of screws, and the tail pipeline is limited on the bottom face of the bottom plate through a limiting component. Through spiral matching of the screw rod and the bottom plate and limitation of the push plate, the lantern ring is horizontally arranged, the lantern ring moving upwards limits the inclined face through the inner inclined groove, the lantern ring clamps the tail pipeline through cooperation of the multiple ring pieces, deviation of the stress cone on the top of the bottom plate due to simple collision is avoided, and the vertical stability of the stress cone is guaranteed.

The invention provides a cross-linked polyethylene insulated aluminum alloy conductor power cable for a coal mine, and relates to the technical field of cross-linked polyethylene insulated power cables. Comprising an aluminum alloy conductor, a crosslinked polyethylene insulating layer, a shielding layer and an outer sheath, the buffer assembly comprises a buffer separation blade, an upper gasket and a lower gasket, the lower gasket is in a hollow cylinder shape and wraps the cross-linked polyethylene insulating layer, the upper gasket is in a hollow cylinder shape, and the upper gasket is connected to the lower gasket in a sleeving mode; the buffer separation blade is strip-shaped, the buffer separation blade is arranged on the lower gasket along the length direction of the cable, and two ends of the buffer separation blade are respectively connected with the upper gasket and the lower gasket; the multiple buffering blocking pieces are evenly arranged between the upper gasket and the lower gasket at intervals in the direction. Through the support of the buffer spacer and the buffer separation blade, the compression buffer of the air cavity and the deformation of the buffer colloid, the bending stress can be effectively absorbed and dispersed, and the mechanical protection can be better provided for the cable.

The ozone-resistant polyethylene cable comprises a polyethylene cable body, the polyethylene cable body is composed of a copper core, an insulating layer, a filling layer, a shielding layer, a built-in steel belt, a sponge buffer layer and an outer sheath layer, the insulating layer is arranged on the outer side of the copper core, the filling layer is arranged on the outer side of the insulating layer, and the shielding layer is arranged on the outer side of the sponge buffer layer. The outer side of the filling layer is provided with a shielding layer, the outer side of the shielding layer is provided with a built-in steel belt, the outer side of the built-in steel belt is provided with a sponge buffer layer, and the outer side of the sponge buffer layer is provided with an outer sheath layer. According to the utility model, by adding the polymerization inhibitor and the carbon black particles into the polyethylene resin, the produced polyethylene cable outer sheath layer is used as the outer sheath layer of the polyethylene cable body, so that the outer part of the polyethylene cable body has stronger ozone resistance, and meanwhile, the insulating layer made of the crosslinked polyethylene material is arranged inside the polyethylene cable body, so that current can be effectively isolated, short circuit can be prevented, and the service life of the cable is prolonged. And the safety and the stability of the cable are ensured.

The utility model relates to the technical field of cable manufacturing, and discloses a double-layer co-extrusion sheath cable which comprises a conductor, a conductor shielding layer, a crosslinked polyethylene insulating layer, an insulation shielding layer, a semi-conductive water-blocking tape, a soft round copper wire, a soft pure copper tape, a non-conductive water-blocking tape and a CPP tape from inside to outside. According to the double-layer co-extrusion sheath cable, the inner sheath layer and the outer sheath layer are arranged, the inner sheath layer is made of the flame-retardant PVC material with the oxygen index larger than or equal to 32%, a carbonization layer can be rapidly formed under the condition of high temperature or open fire, oxygen is effectively isolated, flame-retardant gas is released, and flame is prevented from spreading towards the interior of the cable, and the outer sheath layer is made of the high-hardness MDPE material. Although the flame retardance is general, the flame diffusion speed can be slowed down, and through the synergistic effect with the inner layer PVC, the overall flame retardant grade of the cable reaches the V-0 grade (UL 94 standard), the high-flame-retardant scene requirement is met, and the flame retardant property is further remarkably improved.

The application relates to the cable technical field and discloses a cross-linked polyethylene insulation medium and high voltage power cable, which comprises an electrical component, the right part of the electrical component is provided with a cable interface, the left part of the cable interface is provided with a bending mechanism, the left part of the bending mechanism is provided with an overhauling mechanism, the cable interface comprises a bayonet, a cable, a conductive head, a joint shell, a spiral rod one, a rotating wheel, a fixed lug, a torsional spring buckle, the bayonet is fixedly connected to the right part of the electrical component, the cable is slidably connected to the inner wall of the electrical component, the conductive head is fixedly connected to the left part of the cable, the rotating inner groove sliding rod is driven to move downwards under the limitation of the circumferential surface helical groove of the threaded rod, the inner groove sliding rod is extruded against the bending rope in the process of moving downwards, so that the length of the bending rope is shortened, the bending rope drives the cable to bend by a certain angle in the process of shortening, so that workers can conveniently carry out wiring work on the cable.