217 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 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 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 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 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 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.

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 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 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.

The utility model relates to a lightweight low-cost coaxial cable for a vehicle, which sequentially comprises a wire core, a metal wrapping tape, a shielding layer and a sheath layer from inside to outside, and the metal wrapping tape is a layer of double-sided metal wrapping tape wrapped outside the wire core; the shielding layer is formed by weaving an aluminum coating basalt fiber shielding weaving layer on the surface of the metal wrapping tape, and 24 ingots and 10 aluminum coating basalt fiber conductors with the monofilament diameter being 0.23 [mu] m are adopted to be evenly attached to the surface of the metal wrapping tape. The wire core is composed of a 7 / 0.26 bare copper conductor and a foaming PP insulating layer, and the outer diameter of the wire core is 2.02-2.18 mm. And the sheath layer is made of PVC (Polyvinyl Chloride). The utility model provides a vehicle coaxial cable which is light in weight and low in cost.

The application discloses a high-temperature-resistant power cable and a preparation method thereof. A copper conductor is twisted to form a core, and an insulating layer, a shielding layer and a protective layer are sequentially coated on the surface of the core to obtain the high-temperature-resistant power cable. The protective layer is a reinforced resin, and the reinforced resin comprises the following raw materials in parts by weight: 100-120 parts of functionalized polyethylene, 20-30 parts of modified filler, 0.5-0.8 parts of p-toluenesulfonic acid and 10-15 parts of 1,4-p-biphenyl boronic acid bis(pinacol) ester. The functionalized polyethylene and the modified filler form an organic-inorganic interpenetrating network under the action of the 1,4-p-biphenyl boronic acid bis(pinacol) ester. The modified filler can form a thermal barrier network in the whole matrix, effectively hinders the thermal motion of the polyethylene molecular chain, and the side chain of the functionalized polyethylene molecular chain contains a phenyl polysiloxane structure, which can increase the flexibility of the polyethylene chain segment. In combination with the formation of dynamic crosslinking, the high-temperature-resistant effect of the material is greatly improved.

The application discloses a kind of corrosion-resistant double-armored submarine cable and preparation method thereof, it is related to submarine cable technical field.The corrosion-resistant double-armored submarine cable includes outer sheath layer, water barrier layer, double-armored layer, insulating inner liner, filling layer, insulating layer, copper conductor in turn from surface to inside;The outer sheath layer is obtained by extruding coating on the surface of double-armored layer by corrosion-resistant submarine cable material;The corrosion-resistant submarine cable material includes the following raw material components: by mass parts, 75-90 parts of high-density polyethylene, 30-50 parts of ultra-high molecular weight polyethylene, 10-25 parts of modified microfiber, 8-15 parts of ethylene-vinyl acetate copolymer, 0.2-0.5 parts of antioxidant, 1-1.2 parts of lubricant.The application optimizes sheath layer material, solves the problems of existing double-armored submarine cable corrosion failure, short service life, unstable performance and other problems, meets the demand of long-term service reliability.

The utility model discloses a copper-clad aluminum conductor photovoltaic wire, which relates to the field of photovoltaic technology and comprises an aluminum conductor, a copper conductor is fixedly sleeved on the outer cylindrical surface of the aluminum conductor, a tin shell is fixedly sleeved on the outer cylindrical surface of the copper conductor, and a waterproof layer is arranged on the outer surface of the tin shell. The waterproof layer is used for improving the waterproof performance of the photovoltaic wire, the outer surface of the waterproof layer is provided with the anti-impact layer, the anti-impact layer is used for improving the strength of the photovoltaic wire, the outer surface of the anti-impact layer is provided with the protective layer, and the protective layer is used for improving the corrosion resistance and ultraviolet resistance of the photovoltaic wire. According to the utility model, the surface of the wire can be effectively protected from being damaged by external environments such as chemical corrosion and mechanical damage through the protection layer, the service life of the wire is prolonged, and the damage of the wire caused by mechanical stress in the transportation, installation and use processes can be reduced through the impact-resistant layer.

The utility model discloses a low-voltage fire-resistant control cable for a fire-fighting system, which comprises a sheath, a flame-retardant belt is fixedly arranged on the inner side of the sheath, a single-sided aluminum foil is fixedly arranged on one side of the flame-retardant belt far away from the sheath, an area is formed between one side of the single-sided aluminum foil and the flame-retardant belt, a grounding wire is arranged in the area, and a plurality of insulating wires are arranged in the single-sided aluminum foil. A conductor is arranged in the insulated wire and is a single-core pure copper conductor, the sheath is composed of two half sheaths, each half sheath comprises a base layer, the base layer is made of a flame-retardant ceramic low-smoke halogen-free sheath material, a flame-retardant layer is fixedly arranged on the outer side of the base layer, an insulating layer is fixedly arranged on one side, far away from the base layer, of the flame-retardant layer, and the flame-retardant layer is made of a flame-retardant ceramic low-smoke halogen-free sheath material. According to the utility model, the problems that the production efficiency is low, the cost is high, and the fireproof performance is easy to damage when the cable is bent due to the fact that mica tape wrapping is adopted in the traditional fireproof cable technology are solved.

The invention relates to the technical field of wires and cables, in particular to a shielding type low-smoke halogen-free flame-retardant control cable and a preparation process, the shielding type low-smoke halogen-free flame-retardant control cable comprises a wire core unit group, a filling layer, a total shielding layer and a sheath layer from inside to outside in sequence, the wire core unit group comprises nine independent wire core units arranged according to '1 + 8' geometry, and each wire core unit is formed by twisting four insulating wire cores in pairs; each insulating wire core comprises a tinned soft copper conductor and a modified cross-linked polyolefin insulating layer, an aluminum-plastic composite belt sub-shielding layer is wrapped outside a wire core unit, the total shielding layer is an aluminum-plastic composite belt layer, a grounding wire core is embedded in the total shielding layer, and the sheath layer is a low-smoke halogen-free flame-retardant polyolefin layer. The control cable disclosed by the invention has the characteristics of low smoke, zero halogen, flame retardance, strong electromagnetic interference resistance and excellent mechanical property, the generation process is stable and controllable, and the control cable is suitable for industrial mass production and is suitable for industrial automation, precise instrument signal transmission and other scenes with strict requirements on environmental protection, safety and signal precision.

The utility model relates to the technical field of data transmission lines, in particular to a high-frequency cable for making a flat wrapping middle coating technology, which is technically characterized by comprising a core wire, a first mylar layer and a wrapping tape layer which are sequentially arranged from inside to outside, the core wire is formed by extrusion, the first mylar layer is used for fixing the core wire, and the wrapping tape layer is used for wrapping the first mylar layer. A middle coating layer is arranged between the first mylar layer and the belting layer, the middle coating layer is formed by extrusion, and the belting layer wraps the periphery of the first mylar layer. Through a multi-layer structure, efficient and stable transmission of signals is realized. The core wire adopts the copper conductor and the polyethylene insulating layer, so that accurate transmission of signals is ensured; the first mylar layer and the middle coating layer are arranged, so that the problem of dielectric coefficient in signal transmission is solved, and the high-frequency performance of the cable is improved; and the aluminum foil wrapping tape layer is added, so that the shielding effect and the structural stability of the cable are further enhanced. Through the series of design, the high-frequency cable has excellent performance in the aspects of reducing attenuation loss and improving transmission efficiency.

The invention provides a high-strength collision-resistant cable and a preparation method thereof. The high-strength collision-resistant cable comprises an oxygen-free copper conductor, a modified insulating layer, a multifunctional buffer layer, a high-strength armor layer and a wear-resistant outer sheath which are sequentially arranged from inside to outside, the invention relates to a preparation method of an anti-aging agent. The high-strength collision-resistant cable is prepared from the following raw materials: 35 to 45 parts of modified crosslinked polyethylene, 12 to 18 parts of polyisobutene grafted maleic anhydride-nano boron nitride compound, 8 to 15 parts of modified high-performance polypropylene-graphene quantum dot compound, 3 to 6 parts of nano titanium dioxide, 7 to 12 parts of aramid staple fiber, 5 to 10 parts of melamine cyanurate and 0.8 to 1.5 parts of calcium stearate. 0.5 to 1.0 part of a silane coupling agent, 6 to 10 parts of polycaprolactone and 0.3 to 0.8 part of an antioxidant. The obtained cable has excellent comprehensive performance of high strength, impact resistance, insulation, flame retardance and weather resistance.

A preparation process for a B1-grade high flame-retardant NS-type fire-resistant cable. On outer surfaces of copper conductors, overlap-wrapping is used and an insulating layer is extruded to obtain insulated cores; after a plurality of insulated cores are stranded into a cable, gaps within a cable core are filled with PP filler ropes for rounding; two layers of halogen-free flame-retardant tapes are wrapped around the outer surfaces of the cores and the fillers, argon arc welding is used to longitudinally wrap an aluminum tape and a corrugation treatment is performed to form an aluminum sheath; and finally, a ceramicized silicon rubber tape and a low-smoke halogen-free flame-retardant polyolefin sheathing material for low-heat-release cables are wrapped, thereby obtaining a finished cable.

The utility model relates to the technical field of closed cooling towers, and discloses a cooling tower for copper conductor thermal forming cooling, which comprises a shell and a fixed base, a cooling mechanism is mounted in the shell, a fixed plate is fixedly connected to the outer side of the shell, a filter is fixedly connected to the outer side of the fixed plate, a sealing cover is mounted at the top of the filter, and a cooling mechanism is mounted in the shell. The filter and the sealing cover are connected through a clamping block assembly, a water inlet pipe is fixedly connected to one side of the filter, a water distribution pipe is fixedly connected to the other side of the filter, and a sealing ring is fixedly connected to the bottom of the sealing cover and used for sealing the filter. According to the cooling tower, the filter is installed at the front end of the spraying system, the sealing cover on the filter can be rapidly detached, a filter element can be conveniently replaced, water is filtered, large particles are removed, a spray head is prevented from being blocked, a large number of impurities in water are removed, corrosion of water to internal components of the cooling tower is reduced, and the service life of the cooling tower is prolonged.

The invention discloses a fire-resistant cable for a cable fire resistance test under a building fire heating condition, and the cable comprises a reinforcing core located in the center, a plurality of copper conductors are arranged outside the reinforcing core in a surrounding and abutting manner, the outer sides of the copper conductors are coated with insulating layers, and the outer sides of the plurality of copper conductors are sequentially provided with a protection layer, a metal sleeve, an isolation layer, a heat insulation layer and an outer sheath. An isolation section is arranged on the isolation layer and the heat insulation layer, and ceramic mud is arranged on the inner walls of the inner ring and the outer ring of the isolation section at intervals. According to the invention, the isolation section is arranged, the fireproof outer layer of the cable forms a sectional structure, the ceramic mud is respectively arranged on the inner walls of the inner ring and the outer ring of the isolation section, and a gap is reserved between the two layers of ceramic mud, so that after being heated, the ceramic mud is ceramized, and ceramic protection mixed with pores or cavities is formed; therefore, the flame-retardant effect of the cable in the length direction is greatly improved, the bending performance of the cable is improved through the gaps in the isolation sections, and corner laying of the cable is facilitated.

The utility model relates to an indoor tensile butterfly-shaped photoelectric composite cable, which comprises a loose tube type optical unit and two soft copper conductors symmetrically distributed on the left side and the right side of the loose tube type optical unit, the loose tube type optical unit comprises a PBT loose tube, two or four optical fibers are arranged in the PBT loose tube, and gaps are filled with fiber paste at the same time. The sectional area of each soft copper conductor is 0.5 mm2 to 1.5 mm2, a crosslinked polyethylene insulating layer is extruded outside each soft copper conductor, and the thickness of the crosslinked polyethylene insulating layer is 0.5 mm-0. 6mm. A layer of low-smoke halogen-free flame-retardant polyolefin sheath finished product is extruded outside the optical fiber unit and the insulated soft copper conductors. The cross section of the low-smoke halogen-free flame-retardant polyolefin sheath is butterfly-shaped, and the thickness of the low-smoke halogen-free flame-retardant polyolefin sheath is 0.6-0.7 mm. The photoelectric composite cable integrates the power wire core and the optical unit, the product size is reduced, the tensile property of the photoelectric composite cable is improved, and the service life of the photoelectric composite cable is prolonged.

The utility model discloses a water-blocking copper core cluster lead, which comprises a plurality of leads connected and combined by connecting ribs, each lead sequentially comprises a plurality of copper conductors, a water-blocking filling layer, a wrapping layer, a water-blocking layer and a sheath layer from inside to outside, and an insulating layer and a shielding layer are sequentially arranged on the outer side of each copper conductor from inside to outside. Water-blocking glue is arranged in gaps among the copper conductors; a plurality of reinforcing members are embedded in the sheath layer, and the reinforcing members are axially embedded in the sheath layer in an annular array. The water-blocking copper core bunched lead is provided with a multi-layer water-blocking structure, so that water is not easy to permeate, diffuse and contact with the conductor, and the sheath is not easy to damage.

The utility model discloses a high-strength tensile detection signal wire, which comprises a metal-plated carbon fiber, at least one copper conductor is arranged on the outer side of the metal-plated carbon fiber, and the metal-plated carbon fiber and the copper conductor are wrapped by an insulating layer. According to the utility model, the carbon fiber has higher strength and certain conductivity, the conductivity of the carbon fiber is enhanced by plating metal on the surface of the carbon fiber, and the metal-plated carbon fiber is used as a carrier for detecting weak current signals, and the resistance of the metal-plated carbon fiber is smaller than that of a conventional semiconductor, so that the current required by signal detection can be ensured; meanwhile, after the metal-plated carbon fiber is used as a conductor and a layer of insulating plastic is extruded outside the conductor, the bending resistance of the cable is greatly improved, the bending radius of the cable can be smaller, and the cable is soft; the metal-plated carbon fiber is small in density, light in weight after being made into a wire, and can be used in occasions sensitive to weight.

This invention discloses a multi-strand synchronous stranding winding machine for soft copper conductors, relating to the technical field of conductor processing equipment. The machine includes a base, with a frame fixedly mounted on the top. Rotary shafts are rotatably mounted on both sides of the frame. A first guide frame, a second guide frame, and a mounting plate are fixedly mounted on the outer wall of the rotating shafts. A first servo motor is fixedly mounted on one outer wall of the frame. A first clamping assembly allows for quick clamping and fixing of the pay-off reel, making the clamping operation convenient and efficient. The pay-off and traction components can also adjust the clamping roller spacing via bolts to accommodate different specifications of soft copper conductors, offering strong versatility. Through the cooperation of the pay-off assembly, the second clamping assembly, the transmission structure, and the winding assembly, integrated synchronous operation of multi-strand soft copper conductors from pay-off, stranding, traction to winding is achieved. This not only improves the accuracy and quality of soft copper conductor processing but also optimizes the operation process and increases production efficiency.

The utility model discloses a wear-resistant power cable with long service life, which relates to the technical field of cables and comprises a cable body, a wear-resistant layer is adhered to the outer surface of the cable body, a plurality of annular grooves are arranged on the outer wall of the wear-resistant layer and are distributed at equal intervals, and the wear-resistant layer is arranged in the annular grooves. The cable body is composed of an outer sheath, an armor layer, a wrapping tape and a copper conductor, the outer sheath, the armor layer, the wrapping tape and the copper conductor are sequentially distributed from outside to inside, the outer surface of the cable body can be prevented from being abraded through the arranged anti-abrasion layer, and therefore the service life of the cable is prolonged; the annular groove arranged on the outer wall of the anti-wear layer can prevent the anti-wear layer from influencing the bending of the cable, and the protection layer outside the copper conductor is provided with the inner and outer shielding layers, so that the anti-interference capability of the cable can be greatly improved.

The utility model discloses a radiation-resistant long-life low-noise coaxial cable for a nuclear power station, which comprises a conductor formed by twisting tinned soft copper, and a wrapping semi-conductive layer, an insulating layer, an extruded semi-conductive layer, a comprehensive shielding structure, a wrapping high-temperature-resistant layer and an outer sheath are sequentially arranged outside the conductor. The tinned soft copper conductors are stranded, so that the structural stability is ensured, and oxidation is avoided; the insulating layer is made of radiation-resistant and long-service-life crosslinked polyethylene, so that the transmission performance is ensured to be stable; noise is reduced through the semi-conductive layer, and signal quality is improved; a comprehensive shielding structure is adopted, so that the electromagnetic compatibility is enhanced; the high-temperature-resistant layer is arranged to meet the high-temperature requirement of the And the outer sheath is made of a radiation-resistant polyolefin material, so that the mechanical property and the service life are ensured. Overall performance is excellent, and the system is suitable for complex environments.

The invention relates to a nickel-plated copper stranded conductor production process and equipment for a high-speed rail, and relates to the technical field of metal conductor machining, the nickel-plated copper stranded conductor production process comprises a base, an unwinding device, a dynamic stranding device and a winding device are installed on the base, and the dynamic stranding device comprises a support, a first gear and a second gear. The winding device comprises a motor, a second rotating rod, a first bevel gear, a second bevel gear and a winding drum. Through a linkage structure of the cleaning device and the dynamic twisting device, synchronous synergy of copper wire cleaning, tension control and uniform nickel plating is achieved, a copper wire can rotate by 360 degrees when penetrating through a nickel plating hole in real time, the binding force of a plating layer and a copper base body is improved, the problems that cleaning is not thorough and nickel plating is not uniform in a traditional technology are solved, and the production efficiency is improved. According to the utility model, the resistance to salt spray corrosion of the conductor is prolonged, the harsh standard of a high-speed rail is met, and accurate cooperation of twisting and winding and adaptation of conductors of multiple specifications are realized through traction sheave synchronous transmission and a self-adaptive positioning device.

This invention discloses a fire-resistant wire and its manufacturing process, relating to the field of fire-resistant wire technology, aiming to solve the technical problem of insufficient fire resistance in existing fire-resistant wires. The wire includes a copper conductor; the surface of the copper conductor is coated with a high-temperature resistant fire-resistant coating, which is composed of a two-component high-temperature resistant insulating ceramic varnish; double-layer calcined mica tape is wound around the copper conductor after the high-temperature resistant fire-resistant coating with a 50% overlap rate. This invention uses an organic silicone resin, an inorganic potassium silicate / lithium silicate composite system, and special additives to form a ceramic protective layer after curing; combined with the double-layer winding of calcined mica tape with a 50% overlap rate, the fire resistance of the wire is extended from 750°C for 90 minutes to 950°C for 180 minutes, effectively improving the fire resistance effect compared to traditional wires. In the event of a fire, the wire can maintain its integrity and stable power supply for a long time, gaining valuable time for fire rescue and emergency equipment operation.

This application relates to the field of cable manufacturing processes, and in particular to a manufacturing process and pretreatment equipment for low-loss millimeter-wave test cables. To address the problem of unstable dielectric constant and high high-frequency signal loss caused by interlayer gaps, the steps are as follows: First, conductor pretreatment, selecting silver-plated copper conductors, cleaning and drying them in pretreatment equipment; Second, PTFE insulation layer wrapping and heat setting, using PTFE film to wrap the pretreated silver-plated copper conductor in layers, followed by high-temperature heat setting in a heat setting furnace; Third, wrapping silver-plated copper flat strips around the PTFE insulation layer; Fourth, sequentially wrapping composite aluminum foil and PTFE film around the silver-plated copper flat strips to form a stabilizing layer; Fifth, preparation of the braided shielding layer. This application has the dual advantages of achieving high-frequency low loss and high structural stability, solving the problems of high high-frequency signal loss and poor structural stability in existing millimeter-wave test cables.