531 results about "Copper conductor" patented technology

The invention discloses a high-temperature-resistant composite insulated cable for an intelligent power grid, and belongs to the technical field of cables. The objective of the invention is to solve the problems of single function, poor high-temperature resistance and easy overload failure of the existing cable. The cable sequentially comprises a compressed circular tinned copper conductor, an inner shielding layer, an XLPE inner insulating layer, an outer shielding layer, a self-repairing composite insulating layer, a metal shielding layer and an outer sheath layer from inside to outside, the self-repairing composite insulating layer is prepared by blending a self-repairing polymer matrix and a microencapsulation phase change material, and the melting point of the microencapsulation phase change material is accurately matched with the double dynamic bond response temperature of the self-repairing matrix. Through cooperation of self-repairing and thermal buffering functions, integration of multiple functions of high temperature resistance, self-repairing and thermal buffering is achieved, the long-term working temperature reaches 105 DEG C or above, no breakdown occurs during thermal shock at 180 DEG C, the overload repairing rate exceeds 80%, the high-temperature and overload working conditions of an intelligent power grid can be effectively adapted, the preparation steps are clear and reproducible, and remarkable technical advantages and application value are achieved.

The invention relates to a composite cable, and relates to the technical field of cables, the composite cable comprises a conductor layer, a composite insulating layer, a waterproof layer, a weather-proof sheath layer and an armor layer from inside to outside in sequence, the conductor layer comprises at least six tinned copper conductors, the tinned copper conductors are symmetrically arranged in a regular hexagon shape, dielectric elastomers are filled among the conductors, and the dielectric elastomers are arranged between the tinned copper conductors. The composite insulating layer comprises an inner shielding layer, a main insulating layer and an outer shielding layer from inside to outside, the waterproof layer is a fluororubber extruded layer, the weather-proof sheath layer comprises a bonding transition layer and a weather-proof functional layer, and the armor layer is of a stainless steel band spiral wrapping structure. The composite cable can meet the requirement for high performance in a harsh environment and can show excellent performance under the extreme conditions of low voltage, large day and night temperature difference, strong ultraviolet rays, sand and dust abrasion, acid rain corrosion and the like.

The invention provides a corrosion-resistant composite cable and a preparation method thereof, the corrosion-resistant composite cable comprises a signal unit, an optical cable unit and a protection unit, the signal unit and the optical cable unit are coated with the protection unit, the signal unit comprises a silver-plated copper conductor, an insulating layer, a shielding layer and a sheath layer, and the silver-plated copper conductor is coated with the insulating layer. The optical cable unit comprises an optical fiber, a buffer tube and a filler; the protection unit comprises an inner sheath, a tensile layer, an anti-corrosion layer and an outer sheath. The corrosion-resistant composite cable has good corrosion resistance, can effectively resist corrosion of various chemical substances, prolongs the service life of the cable, reduces the fault risk caused by corrosion, and improves the stability and reliability of power transmission or signal transmission; under severe environment conditions, such as high humidity, high salinity and high alkalinity, a normal working state can still be kept, continuous and stable support is provided for related equipment or systems, and normal operation of the equipment or systems is guaranteed.

The invention relates to composition and preparation of a thick-film copper conductor sintered at different temperatures and different atmospheres, and belongs to the field of chemical preparation. Comprising the following steps: mixing 65-85% of copper powder, 3.0%-15.0% of glass, 15.0%-35.0% of an organic adhesive and 0.1-1.5% of an additive which is one or more of titanium trioxide or stannous oxide, cuprous oxide and copper oxide, rolling into slurry, and sintering at 850-950 DEG C under the protection of nitrogen or ammonia gas to obtain a copper conductor. The medium-temperature copper paste is prepared by the following steps: mixing 60.0-85.0% of copper powder, 3.0-13.0% of glass, 8.0-25.0% of an organic adhesive and 0.2-1.6% of an additive which is one or more of titanium sesquioxide or stannous oxide, cuprous oxide and copper oxide, rolling into paste, and sintering at 450-650 DEG C under the protection of nitrogen or ammonia gas to obtain a copper conductor. The low-temperature copper paste is prepared by mixing 60.0-85.0% of copper powder, 3.0-13.0% of glass, 8.0-25.0% of an organic binder and 0.1-2.0% of an additive which can be one or more of elemental elements of magnesium, zinc, boron and phosphorus or one or more of nickel phosphide, nickel boride, copper phosphide and copper oxide, rolling the mixture into paste, and sintering the paste in air at 250-350 DEG C to obtain a copper conductor.

The invention relates to the technical field of trailing cables, and discloses a high-tensile-strength lightweight deep sea trailing cable, which is characterized in that the outer side of a copper conductor is coated with an insulating layer, the periphery of an inner support piece is coated with a heat dissipation layer capable of uniformly transferring heat, the outer side of the heat dissipation layer is provided with a waterproof layer capable of blocking and preventing water, the waterproof layer is embedded in the inner side of a tensile inner layer, and the tensile inner layer is provided with a waterproof layer. According to the invention, the heat transfer and heat dissipation capability in the cable is effectively improved, the passive water blocking and active water stopping capability in the cable is enhanced, the tensile inner layer endows the cable with excellent tensile strength, and the pressing layer greatly improves the pressure resistance and compression resistance of the cable, so that the cable has the capability of stable operation in severe environments of high pressure and low temperature in deep sea, and the service life of the cable is prolonged. In addition, a light-weight fiber material is used for replacing a traditional metal material, the high tensile property is guaranteed, meanwhile, light weight of the cable is achieved, the dragging resistance is reduced, and the comprehensive use requirement for high tensile strength and light weight is met.

The invention relates to the technical field of cable processing, and discloses a mica tape cross-linked polyethylene insulated cable which comprises a copper conductor, a mica tape, a cross-linked polyethylene insulating layer, a filling material, a wrapping layer and a cable sheath from inside to outside, the mica tape comprises mica paper, a reinforcing material and an adhesive, and the adhesive comprises tung maleic anhydride type mica glue and MgO / gamma-Al2O3 composite filler. The adhesive adopted by the mica tape comprises the MgO / gamma-Al2O3 composite filler and the tung maleic anhydride type mica glue, and the MgO / gamma-Al2O3 composite filler can improve the heat conductivity coefficient and the dielectric property of the tung maleic anhydride type mica glue, so that the heat conductivity and the insulativity of the mica tape are improved.

The utility model discloses a steel core copper conductor stainless steel wire armored combination cable for a buggy ladle, which comprises three power wire cores and a control wire core, the three power wire cores and the control wire core are uniformly distributed at intervals of 90 degrees in the circumferential direction through an X-shaped polyurethane elastomer isolation core, a central hole is formed in the central part of the X-shaped polyurethane elastomer isolation core, and a galvanized steel wire reinforced core is sleeved in the central hole; and a polyether polyurethane inner sheath layer, a Kevlar fiber inner braid layer, a stainless steel wire armor layer, a Kevlar fiber outer braid layer and a polyether polyurethane outer sheath layer are sequentially coated outside the X-shaped polyurethane elastomer isolation core. The cable is better in flexibility and structural stability, the sheath is prevented from wrinkling, the cable is prevented from being twisted and deformed, the durability and the applicability are improved, and potential safety hazards are reduced.

The corrosion-resistant high-temperature-resistant anti-interference sensor cable comprises a conductor layer, an insulating layer, a shielding layer and an outer sheath layer which are sequentially arranged from inside to outside, the conductor layer is a copper conductor of which the surface is coated with a nano-plating layer, the insulating layer is of a multi-layer insulating structure formed by wrapping PTFE film strips, the lap joint rate of each layer of PTFE film strip is 30-50%, and the lap joint rate of each layer of PTFE film strip is 30-50%. The shielding layer comprises a double-shielding structure formed by longitudinally wrapping a graphene shielding tape and a copper wire braid layer, and the outer sheath layer is a modified TPU elastomer. The invention further discloses a production method of the corrosion-resistant, high-temperature-resistant and anti-interference sensor cable. According to the corrosion-resistant, high-temperature-resistant and anti-interference sensor cable and the production method thereof provided by the invention, the material and the process of the sensor cable are improved, so that the comprehensive upgrading of the cable in the aspects of high temperature resistance, corrosion resistance, signal stability and the like is realized, and the normal use of the sensor cable in a smelting plant is met.

The invention discloses a-52 DEG C cold-resistant environment-friendly cable, relates to the technical field of cables, and solves the problem that a cold-resistant environment-friendly cable in the prior art is easy to crack and crack in a low-temperature environment. Comprising a wire core structure, the nylon sheath wire core structure comprises a plurality of conductors distributed in an array, an insulating layer wrapping each conductor and a metal shielding layer wrapping each insulating layer, and each nylon sheath conductor is a tinned copper conductor; the nylon sheath metal shielding layer comprises an inner metal layer and an outer metal layer, the nylon sheath inner metal layer is arranged outside the insulating layer, and the nylon sheath outer metal layer is arranged outside the inner metal layer; the cable also comprises an outer sheath which wraps the cable core structure, and the nylon sheath is made of a thermoplastic elastomer. According to the cable scheme, on one hand, the flexibility, the mechanical strength and the environmental protection performance of the cable can be improved while a low-temperature environment is considered, and on the other hand, the influence of low temperature on data transmission of the cable can be effectively avoided.

The invention relates to the technical field of submarine cables, in particular to a high-performance wet-type dynamic submarine cable which comprises a conductor, and a filling strip, a cabling wrapping tape, an inner sheath, an armor and an outer sheath are sequentially arranged on the outer side of the conductor from inside to outside. According to the high-performance wet-type dynamic submarine cable, the compressed circular copper oxide water-blocking conductor is adopted, the insulating layer is arranged on the surface of the copper conductor, the skin effect of the conductor is reduced, and the current-carrying capacity can be improved; the armoring is a double-layer reverse armoring, an inner layer bonding and outer layer non-bonding structure is adopted, through reverse twisting, torsion generated in the twisting process of the cable is effectively counteracted, so that the knotting and fracture risks caused by torsion in the laying and using processes of the cable are remarkably reduced, the anti-pressure capability and the dynamic flexibility are balanced through the layered design, and the service life of the cable is prolonged. The sliding frequency and the abrasion risk of outer-layer steel wires are reduced.

The invention relates to the technical field of special cable manufacturing, in particular to a corrosion-resistant power cable and a preparation method thereof.The corrosion-resistant power cable is composed of a copper conductor, a conductor shielding layer, a crosslinked polyethylene insulating layer, an insulating shielding layer, a metal shielding layer, a lining layer, an armor layer and an outer sheath; the surface of the copper conductor is plated with a nickel-phosphorus alloy, and the outer sheath contains low-density polyethylene, an ethylene-vinyl acetate copolymer, nano zinc oxide, a rare earth cerium compound and a silane coupling agent; the insulating layer is prepared through silane crosslinking, the armor layer is a galvanized steel strip or a steel wire, the metal shielding layer is wrapped by a copper strip or a copper wire, and the lining layer is made of polyethylene or a halogen-free material. The outer sheath is high in corrosion resistance, the conductors are resistant to oxidation, the insulation eccentricity is low, the stability is improved through the shielding and armoring structure, the insulation performance is optimized through the cross-linking technology, the preparation technology is suitable for industrial production, the qualified rate of finished products is high, and cost is low.

The invention discloses a cable for power transmission, which relates to the technical field of cable manufacturing and structurally comprises a cable core assembly, an inner insulating layer, a shielding layer, an outer insulating layer and an outer protective layer from inside to outside in sequence. In the cable core assembly, a core wire sleeve is arranged outside a conductive core wire, and a copper conductor is wound in a spiral twisting groove outside the sleeve; a spiral supporting framework and an elastic buffer layer are arranged outside the inner insulating layer; reinforcing fiber bundles are arranged in the shielding layer; and the outer insulating layer and the outer protective layer are protected layer by layer. The cable realizes performance optimization by virtue of a unique structure and a unique material: electrical conduction stability and electromagnetic shielding are ensured; physically, the material has compression resistance, tensile resistance, wear resistance and impact resistance; through the heat dissipation and protection design, the device can stably operate in a complex environment, improves the power transmission reliability, reduces the maintenance cost, and is suitable for various power transmission scenes.

The invention relates to the technical field of cables, and discloses a high-temperature-resistant bending-resistant medium-voltage cable. The medium-voltage cable sequentially comprises a cable core, an isolation sleeve layer, a metal armor layer and an outer protection layer from inside to outside. The cable core is formed by twisting a plurality of insulated wire cores; each insulating wire core comprises a copper conductor, and a conductor shielding layer, an insulating layer and an insulating shielding layer which coat the outer side of the copper conductor; the cable has excellent high-temperature resistance and bending resistance, and the outer sheath is prepared by taking linear low-density polyethylene, polypropylene and modified linear low-density polyethylene as main raw materials and adding functional aids such as a composite flame retardant and a compatilizer; and the modified linear low density polyethylene is introduced into the outer protective layer, so that the high temperature resistance of the outer protective layer is improved while the excellent bending resistance and flexibility of the polyethylene are retained, and the medium-voltage cable can be used in a high-temperature environment.

The invention discloses a fusion device magnet coil copper conductor nondestructive testing method and a computer product, and relates to the technical field of nondestructive testing, the method comprises the following steps: obtaining original eddy current testing signals of a to-be-tested object or a plurality of areas of the to-be-tested object under specific physical conditions; preprocessing the original eddy current detection signal, wherein the preprocessing comprises denoising and signal correction; extracting features from the preprocessed signals and carrying out normalization processing; on the basis of a pre-established multi-parameter model related to the physical conditions of the to-be-tested object, theoretical signals of the to-be-tested object under various physical conditions are predicted through finite element simulation; and performing matching estimation on the normalized signal and a theoretical signal to obtain an estimated signal, and evaluating the defect existence probability based on the estimated signal. Based on an eddy current testing technology, a probe scans a sample and obtains a signal, and a finite element analysis method is combined to simulate and evaluate defects such as cracks possibly existing in a material.

The invention discloses a fire-resistant medium-voltage cable and a performance detection method thereof, and relates to the technical field of cables, the fire-resistant medium-voltage cable comprises a cable, the cable comprises an anti-impact buffer layer, the inner wall of the anti-impact buffer layer is sequentially provided with an expansion type mica tape, a corrugated stainless steel band armor and a ceramic fiber woven mesh, the inner wall of the ceramic fiber woven mesh is provided with a filling layer, and the filling layer is provided with a sealing layer. A double-gradient ceramic insulating layer is arranged in the filling layer, a double-layer heterogeneous semi-conductive water-blocking tape is arranged on the inner wall of the double-gradient ceramic insulating layer, a copper conductor is arranged on the inner wall of the double-layer heterogeneous semi-conductive water-blocking tape, and the cable can be pre-clamped by arranging a protection mechanism and completely wrapping the cable through a sponge pad; at the moment, the cable exists between the two opening and closing plates and the sponge pad and does not fall off, then the specific position of the cable is convenient to adjust, the two ends of the cable are clamped into the clamping heads more conveniently and rapidly, and the problem that the cable is difficult to clamp into the clamping heads manually due to the fact that the cable is heavy is solved.

The invention discloses a halogen-free low-smoke flame-retardant degaussing cable for ships, and the cable comprises a copper conductor, the outer layer of the copper conductor is sleeved with an insulating layer, and the outer layer of the insulating layer is sleeved with a degaussing flame-retardant composite layer. The degaussing flame-retardant composite layer is prepared from a degaussing flame-retardant composite material; the degaussing flame-retardant composite material comprises the following raw materials in parts by mass: 100 parts of an ethylene-vinyl acetate copolymer, 15-20 parts of nano nickel-zinc ferrite, 60-80 parts of a modified flame retardant, 10-15 parts of red phosphorus microcapsules and 3-5 parts of nano montmorillonite, and the halogen-free low-smoke flame-retardant degaussing cable for ships and warships provided by the invention is a halogen-free low-smoke flame-retardant degaussing cable for ships and warships. Through the multistage flame-retardant system design and the nano ferrite degaussing integration and interface synergistic strengthening process, synergistic optimization of halogen-free, low-smoke, high-flame-retardant and degaussing functions of the ship cable is realized, and compared with the traditional technology, the ship cable is remarkably improved.

The application discloses a fire-resistant medium-voltage cable and a performance detection method thereof, and relates to the technical field of cables.The fire-resistant medium-voltage cable comprises a cable, and the cable comprises an impact-resistant buffer layer, the inner wall of the impact-resistant buffer layer is sequentially provided with an expanded mica tape, a corrugated stainless steel tape armor and a ceramic fiber woven mesh, the inner wall of the ceramic fiber woven mesh is provided with a filling layer, the filling layer is internally provided with a double-gradient ceramic insulation layer, the inner wall of the double-gradient ceramic insulation layer is provided with a double-layer heterogeneous semi-conductive water-resistant tape, and the inner wall of the double-layer heterogeneous semi-conductive water-resistant tape is provided with a copper conductor.The protection mechanism is arranged and completely wrapped by the sponge pad, so that the cable can be pre-clamped, the cable at this time exists between the two opening and closing plates and the sponge pad, and will not fall off, thereby facilitating the adjustment of the specific position of the cable, and the two ends of the cable are clamped into the clamping head more conveniently and quickly, and the problem that the cable is difficult to be manually clamped into the clamping head due to the heavy weight of the cable will not occur.

The utility model discloses a composite protection intelligent cable for mountain rail transit, which belongs to the technical field of cables and comprises a circular copper conductor, and a conductor semi-conductive shielding layer, an insulating layer, an insulating semi-conductive shielding layer and a semi-conductive water-blocking buffer layer are sequentially arranged outside the circular copper conductor. A metal shielding layer is arranged in the semi-conductive water-blocking buffer layer, and a waterproof layer, an oxygen barrier layer, an armor layer, an alkali-free glass fiber tape wrapping layer, an outer sheath layer and a composite sheath layer are sequentially arranged outside the semi-conductive water-blocking buffer layer; and a temperature measuring and communication optical cable is arranged in the metal shielding layer. The 35kV flame-retardant B1-level composite protection intelligent cable for mountain rail transit has wear-resistant, rat-proof, termite-proof and ultraviolet-proof additional performance, a temperature-sensing detection optical cable is arranged on a metal shielding layer, the whole line is effectively monitored, management of a master console is matched, when the temperature exceeds the set temperature, automatic alarm, power-off protection and line switching are achieved, and the service life of the cable is prolonged. Fire situations such as electrical short circuit are avoided, and safe and reliable operation of rail transit lines is guaranteed.

The utility model discloses a novel high-temperature-resistant corrosion-resistant medium-voltage power cable, which comprises a nickel-plated copper conductor, a double-layer high-silica glass fiber yarn layer is arranged on the surface of the nickel-plated copper conductor, and a conductor shielding layer, a polytetrafluoroethylene insulating layer, an insulating shielding layer and a copper strip shielding layer are sequentially arranged outside the double-layer high-silica glass fiber yarn layer. And a flame-retardant alkali-free glass fiber rope filling layer is arranged outside the copper strip shielding layer. The novel high-temperature-resistant corrosion-resistant medium-voltage power cable provided by the utility model has high-temperature-resistant and corrosion-resistant effects by arranging the nickel-plated copper conductors, the high-temperature-resistant performance of the conductors is improved by arranging the double-layer high-silica glass fiber yarn layers, the tensile strength of the product is improved by arranging the steel wire armoring, and the novel high-temperature-resistant corrosion-resistant medium-voltage power cable has high-temperature-resistant performance. The cable provided by the utility model has the advantages of high temperature resistance, corrosion resistance, excellent tensile property, thermal aging property and the like, normal and stable work at rated high temperature, no influence on electric energy transmission performance, and long service life.

The invention relates to the technical field of fireproof cables, in particular to a flexible fireproof cable with staggered cooling runners, which comprises a fireproof cable body, and the fireproof cable body comprises a stranded copper conductor, a conductor insulator, a cabling, an argon arc welding corrugated copper sleeve and a halogen-free flame-retardant polyolefin outer sheath from inside to outside. And the outer side of the fireproof cable body is sleeved with an externally-hung monitoring flow guide device at the joint positions at the two ends. According to the flexible fireproof cable with the staggered cooling flow channel, conductor insulation is formed by a polyester belt, a double-sided synthetic mica belt and a conductor single-sided synthetic mica belt, and a cabling is formed by a halogen-free flame-retardant filling rope, a cabling single-sided synthetic mica belt and a halogen-free flame-retardant belt to form a flame-retardant material; the flame-retardant effect of the whole cable can be greatly enhanced, and secondary pollution is avoided; and an argon arc welding corrugated copper sleeve is arranged between the cabling and the halogen-free flame-retardant polyolefin outer sheath, so that the fireproof cable body has certain flexibility, and a serial cavity can be formed in the fireproof cable body.

The present invention discloses a method, device and medium for constructing a compact copper conductor tokamak, which relates to the technical field of index evaluation. By obtaining the evaluation indexes of the tokamak device, a quantitative evaluation system is constructed; based on the device operation conditions, the parameter thresholds of the evaluation parameters in the quantitative evaluation system are determined; based on the parameter thresholds, the major radius and minor radius thresholds of the compact device are determined; according to the major radius threshold and minor radius threshold, the boundary of the plasma is determined; and based on the plasma boundary, the compact device is constructed. By establishing a quantitative index system for the comprehensive engineering technology capabilities of the tokamak, the ranges of core parameters such as the major radius and minor radius of the plasma can be quickly determined, the dimension chain can be determined more accurately, the conflict between physical requirements and engineering implementation caused by large dimension chain errors can be reduced, and the engineering capabilities can meet the standards when the device is miniaturized and compactly designed.

The invention relates to the technical field of low-resistance conductive materials, and particularly discloses a base particle vortex mediated near-room-temperature ultralow-resistance material which comprises a main body material and a regulating medium, the main body material is a doped transition metal oxide or a carbon-based composite material; the regulation and control medium is a low-atomic-weight doping agent; the doped transition metal oxide is La-doped SrTiO3 or Nb-doped TiO. Compared with a traditional copper conductor, the material has the advantages that the resistance is obviously reduced, the energy loss in the electron transmission process can be greatly reduced, the energy efficiency of electronic equipment and new energy equipment can be obviously improved, the material can adapt to the environment temperature change of most indoor and outdoor engineering application scenes, and the application prospect is wide. The problem that part of low-resistance materials are poor in temperature stability is solved, the reliability of long-term operation of devices is guaranteed, conventional processes and equipment such as magnetron sputtering, spin coating and pyrolysis, tube furnace doping and mechanical bending are adopted in the whole process, the operation process is clear and easy to understand, and large-scale production can be achieved in common material laboratories or small and medium-sized production workshops.

The present application relates to the technical field of electronic packaging materials, and particularly relates to a thick copper packaging circuit board capable of resisting high-salt mist corrosion and a preparation method thereof, which comprises the following steps: S1: preparing a glass fiber-BT resin composite core layer for standby; S2: preparing a fluorine-modified polyimide packaging coating solution for standby; S3: preparing a surface corrosion-resistant composite coating for standby; S4: bonding the thick copper foil and the glass fiber-BT composite core layer to obtain a thick copper conductor; S5: applying the fluorine-modified polyimide packaging coating solution to the surface of the thick copper conductor layer to form a packaging layer; S6: spraying the corrosion-resistant coating on the surface of the packaging layer to form a composite corrosion-resistant coating; and S7: performing overall curing and hot pressing to finally obtain a thick copper packaging circuit board product. According to the present application, a multi-layer synergistic protection structure is constructed and the preparation process is optimized, so that the corrosion resistance and structural stability of the thick copper circuit board in a high-salt mist environment are significantly improved.

The invention relates to the field of sensor cables, in particular to a Hall effect-based speed sensor cable, which comprises conductors, an outer sheath, a protective hose and the like, the conductors are made of silver-plated copper and are twisted in pairs, an insulating layer is made of crosslinked polyethylene, and a composite shielding layer comprises an aluminum foil wrapping layer, a tinned copper woven mesh and a ferrite magnetic ring. The protective hose is made of a polyurethane material and is provided with a spiral structure, an anti-bending metal ring and a corrosion-resistant protective ring; the silver-plated copper conductors are twisted in pairs, so that the high-frequency signal transmission performance is improved, and the long-distance transmission attenuation is reduced; the composite shielding layer effectively resists electromagnetic interference; the service life of the cable is prolonged; the cross-linked polyethylene insulating layer, the polyurethane protective hose and the corrosion-resistant protective ring enable the cable to adapt to severe industrial environments and ensure stable operation in different temperatures and complex chemical environments.

This invention discloses an environmentally friendly, green, halogen-free flame-retardant cable and its preparation method, relating to the field of cable technology. The cable includes a tin-plated copper conductor at its center. An inner shielding layer, an insulation layer, and an outer shielding layer are extruded onto the conductor using a three-layer co-extrusion process to form an insulated core. The insulated core is then wrapped with an oxygen-free soft copper strip as a metallic shielding layer, followed by a semi-conductive water-resistant tape pad, then longitudinally wrapped with an aluminum-plastic composite tape and extruded with polyethylene. A waterproof layer is wrapped with a double-layer high-strength corrosion-resistant alloy tape as an armor layer. The outermost layer of the cable is extruded with a flame-retardant outer sheath. This sheath uses polyethylene as a base material, adding maleic anhydride-modified oleic acid and peroxide, and incorporating zinc oxide and magnesium oxide to form an ion network structure, while also incorporating flame-retardant fillers. This invention exhibits good tensile strength, electrical insulation performance, compressive and tensile strength, and bending performance, while also possessing excellent elongation at break, low-temperature crack resistance, and halogen-free flame-retardant characteristics.

The utility model discloses a photoelectric composite cable with a special structure, which belongs to the technical field of communication equipment, aims at solving the problems of limited transmission rate, limited transmission distance, limited bandwidth and limited application scene of a network cable, and comprises a flame-retardant outer sheath, a Kairaff fiber protection layer is arranged at the central position in the flame-retardant outer sheath, and a cable core is arranged in the flame-retardant outer sheath. The cable comprises a flame-retardant coating, a Kailaff fiber protective layer is arranged in the flame-retardant coating, fiber paste is arranged in the Kailaff fiber protective layer, an optical fiber core is installed in the fiber paste, PE insulating layers are arranged at the positions, close to the two sides, in the flame-retardant coating, and oxygen-free copper conductor power lines are installed in the two PE insulating layers. The photoelectric composite cable has the high-speed data transmission capability of the optical fiber and integrates the function of power transmission, the optical fiber core and the oxygen-free copper conductor power line adopt independent shielding layers, electromagnetic interference and optical fiber transmission loss are effectively reduced, the transmission performance of the photoelectric composite cable is improved, a relatively independent structure is kept, and introduction and connection during installation are facilitated.

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 relates to the technical field of copper conductor preparation, in particular to a preparation process of an ultra-fine copper conductor for a new energy automobile. The preparation process of the ultrafine copper conductor for the new energy automobile comprises the following steps: firstly, preparing a copper alloy rod blank, and then carrying out fusion casting, solid solution, cooling deformation and aging treatment on the copper alloy rod blank to obtain a copper alloy rod blank; and then carrying out first-time wire drawing treatment, first-time intermediate annealing treatment, second-time wire drawing treatment, second-time intermediate annealing treatment, third-time wire drawing treatment, third-time intermediate annealing treatment and final annealing treatment on the copper alloy rod blank to obtain the finished product copper alloy superfine single-strand wire. And the finished copper alloy superfine single-strand wire is stranded in multiple strands to obtain the superfine micro-copper stranded conductor wire. The prepared ultra-fine copper conductor for the new energy automobile has the advantages of high conductivity, high strength and high deflection resistance, is comparable to foreign imported products, and can be made in China instead of imported products.

The invention discloses a preparation method of a paper-insulated enameled copper flat wire, which relates to the technical field of paper-insulated conductors, and comprises the following steps: preparing a copper flat wire from a copper conductor; coating the insulating paint on the copper flat wire, and baking and curing to obtain an enameled copper flat wire; the enameled copper flat wire is wrapped by two gap wrapping layers to form a composite wire A. The gap wrapping layers are formed by spiral winding and gap wrapping of insulation paper in the length direction of the enameled copper flat wire. And taking one composite wire A or a plurality of composite wires as a composite wire B, and spirally winding, overlapping and coating the composite wire A or the composite wire B to form a self-locking wrapping layer. According to the invention, a composite wrapping mode of inner-layer gap wrapping (two layers) and outer-layer self-locking wrapping is adopted, and the spiral winding design of the insulation paper is combined, so that the paper layers are ensured to be tightly attached under bending or mechanical stress, looseness and gaps are avoided, and the mechanical stability and the electric insulation reliability of the insulation layer are remarkably improved.

The application discloses a kind of building fire carbon hydrogen pool fire-resistant cable, it is related to cable technical field, including outer sheath and the oxygen barrier layer that is laid on the inner wall of outer sheath, several copper conductors are evenly installed in the oxygen barrier layer inside around its axis, copper conductor is wrapped with fire resistance layer, and the insulating layer is wrapped outside fire resistance layer;Oxygen barrier layer inside is also provided with filling.The filling section is circular and is attached with each insulating layer;Adjacent insulating layers are attached with each other, and each insulating layer is attached with the inner wall of oxygen barrier layer.The building fire carbon hydrogen pool fire-resistant cable provided in the application compared with traditional fire-resistant cable, its filling layer is only located at the center position of cable, and oxygen barrier layer inside space is not completely filled, i.e. there is still gap between adjacent conductors, and there is also gap between conductor and oxygen barrier layer.Such, the resistance generated when cable deforms is smaller, cable can produce larger bending, and the range of application is wider.