382 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 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 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 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 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 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 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 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.

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 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.

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 application relates to the technical field of power cables, and discloses a fire-resistant cable for fire-fighting power supply and distribution of super-high-rise buildings and a preparation method thereof. The cable comprises five insulated cores, the conductor is a GB / T3956 type 2 tightly pressed stranded copper conductor, the core adopts a double-layer insulation structure, the inner layer is crosslinked polyethylene, and the outer layer is ceramicized polyolefin, the thickness ratio is 3:7, the cable core gap is filled with a ceramicized silicone rubber filling rope, and then two layers of ceramicized silicone rubber belts are bidirectionally staggered and wrapped, so that an integrated ceramic protection is formed; a steel belt and steel wire composite armor are arranged outside to bear vertical tension; and the outermost layer is woven with glass fibers and impregnated with ceramicized silicone rubber for solidification. The cable builds a multi-stage fire-resistant system, overcomes the defects of traditional cable laying difficulty, inflammable filling and long-term stress loosening, can meet the B1-grade combustion performance and 3-hour fire resistance requirement, and is suitable for super-high-rise vertical fire-fighting trunk lines.

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 invention discloses wire twisting equipment for soft copper conductor processing, and relates to the technical field of conductor processing equipment. The wire twisting equipment for soft copper conductor processing comprises a fixed base, a hollow column and a fixed frame are fixedly installed at the top of the fixed base, a hollow rotating disc is arranged on one side of the hollow column, a fixed plate is fixedly installed on the outer wall of one side of the hollow rotating disc, a bobbin rod is fixedly installed at the top of the fixed plate, and the wire twisting equipment further comprises a positioning assembly arranged on the hollow rotating disc. According to the wire twisting equipment for soft copper conductor processing, the positioning assembly can flexibly adjust the use angle of the positioning plate through the gear and the positioning plate, the bobbin can be replaced without disassembling and assembling multiple groups of positioning plug-ins, the material changing time is greatly shortened, the problem that the production efficiency is affected due to tedious material changing of traditional equipment is solved, and meanwhile, the production efficiency is improved. The four sets of fixing plates, the bobbin rods and the positioning assemblies are symmetrically distributed in pairs, it is ensured that the bobbin rotates stably, deviation is avoided when the soft copper wire is paid off, and the early-stage paying-off precision is improved.

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 invention relates to a chip three-dimensional security packaging structure and packaging method, the chip three-dimensional security packaging structure comprises a cipher chip, a back layer, a middle layer and a rewiring layer, the middle layer is provided with an inverted trapezoidal groove, the cipher chip is arranged in the groove, and a TSV is arranged on the middle layer close to the groove; copper lines are embedded in the back layer, are uniformly arranged in an S shape and are electrically connected with the TSVs; the rewiring layer comprises a polyimide dielectric layer and a copper wire, the lower end face of the polyimide dielectric layer is filled in the groove and covers the groove and the password chip, the copper wire is arranged in the polyimide dielectric layer, one end of the copper wire is electrically connected with the TSV and the password chip, the other side end of the copper wire penetrates out of the polyimide dielectric layer to be connected with a solder ball, and a packaging method is set. The whole chip is wrapped by the metal wiring net formed by the copper lines in the back layer, the copper conductors in the middle layer and the copper wires in the re-wiring layer, three-dimensional safety protection of the chip is achieved, and the problem that the packaging difficulty is large is solved in combination with a packaging method.