6170results about "Cable/conductor manufacture" patented technology

The invention relates to a hot-rolled wire rod for a 2260MPa-grade stranded wire and a manufacturing method of the hot-rolled wire rod, after the high-carbon component design of C-Si-Mn-Cr-Mo-Nb-Al is adopted for rolling and spinning to form the wire rod, online molten salt isothermal toughening treatment is carried out, so that the wire rod is firstly subjected to front-section molten salt treatment and is rapidly cooled, and enters a sorbite phase region from an austenite state to form a structure taking a sorbite structure as a main structure; and then carrying out rear-section molten salt treatment, reducing the circulation volume of molten salt, promoting the unconverted retained austenite to be continuously converted into sorbite, carrying out isothermal tempering, promoting fusing of a part of sorbite lamellar layers, and finally carrying out slow cooling through a roller way, so as to prepare the hot-rolled wire rod of which the microscopic structure comprises a mixed structure consisting of tempered sorbite, ferrite and fused sorbite, the tensile strength can reach 1534-1584 MPa, the percentage reduction of area can reach 33%-38%, and the alloy can be used in the application fields of manufacturing 2260 MPa grade stranded wires and the like without additional heat treatment procedures.

According to the control method of the high-speed stranding machine provided by the invention, abundant data support is provided for comprehensively and accurately analyzing wire diameter change reasons by acquiring stranded wire cross-section image data, stranded wire surface temperature data and real-time rotating speed of the stranding machine corresponding to the high-speed stranding machine in real time and a real-time tension value acquired by a tension sensor. And carrying out wire diameter measurement by adopting the cross section image data of the stranded wire to generate a real-time wire diameter measurement value. A real-time wire diameter measurement value is dynamically compared with a preset standard value, a deviation coefficient is generated, and a clear adjustment signal is provided through the deviation coefficient. And according to the deviation coefficient, dynamically adjusting a stranding parameter of the high-speed stranding machine to generate a target stranding parameter, and the step can respond to the change of the wire diameter in real time. And real-time compensation control is carried out on the high-speed stranding machine through the closed-loop feedback system according to the target stranding parameters, deviation is corrected in time, and it is ensured that the wire diameter is always kept within an allowable range.

The invention relates to the technical field of cable stranding preparation, in particular to a stranding preparation method of an unshielded data transmission cable, and the method comprises the steps: carrying out the preprocessing of a metal conductor, and coating the metal conductor with an insulating layer, and forming an insulating wire core; a plurality of insulated wire cores are twisted into wire pairs, and the twisting pitch is dynamically adjusted in the twisting process; and combining the wire pairs with the filling material to form a cable core, wrapping and fixing the cable core, and extruding a coating sheath on the outer layer to form a complete cable. The invention aims to dynamically adjust the wire pair twisting pitch, dynamically compensate the influence of the pitch deviation on the crosstalk performance, and realize the accurate control of the pitch deviation.

The invention relates to the technical field of cables, and provides a fireproof flame-retardant 10kV power cable and a preparation method thereof. The fire-resistant flame-retardant 10kV power cable comprises a conductor and a fire-resistant flame-retardant layer, the fireproof flame-retardant layer is prepared from the following raw materials in parts by weight: 35 to 45 parts of linear low-density polyethylene, 40 to 50 parts of ethylene-vinyl acetate copolymer, 25 to 30 parts of modified aluminum hydroxide, 5 to 8 parts of polyethylene grafted maleic anhydride, 10 to 12 parts of phosphate modified halloysite nanotube, 5 to 8 parts of ZIF-8 loaded zinc borate core-shell particles, 15 to 20 parts of magnesium hydroxide and 2 to 3 parts of silane coupling agent. 0.5 to 1 part of antioxidant, 0.5 to 1 part of calcium stearate and 1 to 1.5 parts of polyethylene wax. According to the cable prepared in the invention, the situation that a conductor is exposed and the fire resistance is lost due to cracking and falling under long-time high-temperature baking is avoided; the continuous effectiveness of the flame retardant at high temperature is improved.

The invention discloses copper-containing slurry suitable for high-temperature sintering and a preparation method thereof, and the copper-containing slurry comprises the following components in percentage by mass: 10-80% of copper powder, 0-80% of silver powder, 0.2-1% of low-softening-point glass powder, 0-3% of high-softening-point glass, 15-20% of an organic carrier and 0.5-3% of an organic auxiliary agent, the low-softening-point glass powder is of a Pb-Te-Li system, the softening temperature ranges from 250 DEG C to 350 DEG C, and the softening temperature is lower than the decomposition temperature of the organic coating agent on the surface of the copper powder. The preparation method comprises the following steps: adding the components according to the ratio, stirring until the components are uniformly dispersed, grinding and sieving to obtain the copper-containing slurry suitable for high-temperature sintering. According to the prepared copper-containing slurry, the low-softening-point glass powder is adopted as a key component, a liquid-phase protection layer is formed in the high-temperature sintering process, oxidation and diffusion of copper are effectively inhibited, and the oxidation resistance and the conductive stability of the copper-containing slurry are improved. Meanwhile, the slurry has good flowability and printing performance, and can meet the requirements of the photovoltaic industry for efficient and low-cost conductive materials.

The invention belongs to the technical field of photovoltaic cables, and particularly relates to a photovoltaic cable extrusion control method. The method comprises the following steps: S1, high-frequency data acquisition: introducing temperature-pressure-speed model data to obtain dynamic extrusion temperature, melt pressure and extrusion speed parameters in an extrusion process; an infrared on-line diameter measuring instrument is introduced to acquire real-time data of the outer diameter of a cable insulating layer and the outer diameter of a sheath layer; establishing an influence intermediate value, wherein the influence intermediate value comprises heat conduction delay time, melt flow delay time and equipment response delay time; establishing a traction speed-melt pressure-temperature-predicted outer diameter quaternary coupling model; according to the method, a quaternary coupling model is established by combining real-time data of the outer diameter of an insulating layer and the outer diameter of a sheath layer on the basis of a speed-temperature-pressure acquisition model, and the problem that repeated vicious cycle adjustment is easily caused by passive logic of'adjustment after waiting for deviation exceeding the standard 'is solved.

The invention discloses a self-adaptive adjustment method and system for twisting tension of a copper stranded wire. According to a state analysis result, a dynamic coupling adjustment mechanism is started, rapid response adjustment of tension is achieved by adjusting the matching relation between the rotating speed of a stranding cage and the linear speed of a traction wheel and linkage with the exciting current of a magnetic powder brake, tension data are rapidly collected through a sensor, and after filtering and abnormal value processing, the tension is obtained. The fluctuation frequency and amplitude are analyzed immediately, and adjustment is started once the fluctuation frequency and amplitude exceed a set range. During adjustment, the ratio of the rotating speed of the stranding cage to the speed of the traction wheel is adjusted, the current of the magnetic powder brake is linked, mechanical adjustment and electromagnetic braking are matched, and the response speed is much faster than that of traditional single-parameter adjustment. Therefore, the stress of the copper stranded wire in the stranding process is uniform, the wire diameter is not thinned or burrs are not formed on the surface due to sudden change of tension, the stranded wire pitch is uniform, the process requirement is met, and the influence on the stranded wire quality due to sudden change of the tension is avoided as much as possible.

The invention relates to the technical field of cables, and discloses a weather-proof high-strength tensile aerial insulated cable and a preparation method thereof.The weather-proof high-strength tensile aerial insulated cable comprises a cable conductor, a protection mechanism is arranged outside the cable conductor, a supporting mechanism is arranged inside the protection mechanism, and an outer sheath is connected to the outside of the protection mechanism through a cushioning mechanism; the exterior of the cable conductor is fixedly connected with a force bearing layer, the exterior of the force bearing layer is provided with a repairing layer, the exterior of the repairing layer is fixedly connected with a heat insulation fireproof layer, the cushioning mechanism comprises an elastic rubber layer, and the inner side of the elastic rubber layer is fixedly connected to the exterior of the heat insulation fireproof layer. According to the invention, through the hollow bionic structure with the diaphragm in the core tubular bearing layer, the self weight is greatly reduced, and excellent bending resistance and torsional rigidity are provided at the same time; when the bearing layer is accidentally impacted, the internal diaphragm can effectively prevent longitudinal spreading of microcracks like a firewall, and damage is limited locally.

The invention belongs to the technical field of radar wave-absorbing materials, and discloses a double-sided wave-absorbing broadband stealth composite material and a preparation method thereof. The broadband stealth composite material with the double-sided wave absorbing function comprises a non-metal-based composite material body and at least five metamaterial layers arranged in the thickness direction of the non-metal-based composite material body at intervals. The number of the metamaterial layers is an odd number, a middle metamaterial layer is arranged in the middle of the metamaterial layers in the thickness direction, and the rest metamaterial layers are symmetrically distributed on the two sides of the middle metamaterial layer; the metamaterial layer comprises conductive pattern units which are periodically arranged; the relative dielectric constant of the nonmetal-based composite material body is not greater than 10; the double-sided wave-absorbing broadband stealth composite material does not contain a metal reflecting layer. When electromagnetic waves with the frequency of 1-18 GHz vertically enter the material, the transmissivity of the material is small (smaller than-13 dB, namely smaller than 5%), and meanwhile the material has low reflectivity in a broadband. And the preparation method is simple to operate and easy to realize large-scale production.

The invention provides base metal conductive paste for a photovoltaic cell and a preparation method, a use method and application thereof, and the conductive paste comprises the following components in percentage by mass: 5-60wt% of oxide coated base metal powder, 27-77wt% of silver powder, 2-5wt% of glass powder, 0.1-3wt% of an antioxidant aid and the balance of an organic carrier; wherein the base metal powder comprises one or more of copper, tungsten, tin, nickel, aluminum and alloy powder of the copper, the tungsten, the tin, the nickel, the aluminum and the alloy powder of the aluminum, and the oxide comprises one or more of silicon oxide, aluminum oxide, titanium oxide and boric oxide. The base metal powder coated with a specific type and a proper amount of oxide is selected and matched with the oxide and the glass powder which are good in compatibility, the manufacturing cost of the conductive paste and the battery can be effectively reduced, meanwhile, the conductive paste is applied to TOPCon and BC batteries, and the battery conversion efficiency can be kept equivalent to or even superior to that of traditional pure silver conductive paste.

The invention relates to a hot-rolled wire rod for a 2200MPa-grade stranded wire and a manufacturing method of the hot-rolled wire rod, after Nb-Al high-carbon component is rolled and spun into a wire rod, the wire rod is subjected to online molten salt strong isothermal treatment, so that the wire rod is firstly subjected to front-section molten salt treatment and enters a sorbite phase region from an austenite state to form a structure taking a sorbite structure as a main structure, and then is subjected to rear-section molten salt treatment to form the hot-rolled wire rod for the 2200MPa-grade stranded wire. The molten salt temperature is increased, the molten salt circulation amount is reduced, unconverted retained austenite is promoted to be continuously converted into sorbite, isothermal tempering is carried out, part of sorbite lamellas are promoted to be fused, and finally slow cooling is carried out through a roller way, so that the hot-rolled wire rod with the microscopic structure comprising a mixed structure composed of tempered sorbite, ferrite and fused sorbite is prepared. According to the method, abnormal structures can be inhibited, the strength of a hot-rolled wire rod can be improved, plasticity and production efficiency are both considered, the tensile strength is 1490-1540 MPa, the percentage reduction of area is 34%-39%, downstream users can avoid off-line heat treatment, and stable production of stranded wires is promoted.

The invention relates to the technical field of cables, and discloses an anti-torsional fatigue and corrosion-resistant wind power cable and a manufacturing process thereof, the anti-torsional fatigue and corrosion-resistant wind power cable comprises a three-phase cable core main body, a dynamic compensation anti-torsion layer, a multifunctional corrosion-resistant barrier layer and an outer sheath, the three-phase cable core main body comprises a stranded conductor, a filling inner layer and an insulating layer; the dynamic compensation anti-torsion layer comprises an incongruous spiral supporting layer and a shape memory alloy compensation layer, and the incongruous spiral supporting layer comprises aramid fiber bundles and a nickel-cobalt alloy wire woven mesh; the multifunctional anti-corrosion barrier layer is arranged on the outer side of the dynamic compensation anti-torsion layer and sequentially comprises an anti-corrosion barrier bottom layer, an anti-corrosion barrier middle layer and an anti-corrosion barrier bottom layer surface layer from inside to outside. Through the gradient composite structure design, the problem of failure of a traditional wind power cable under long-term dynamic load and severe environment is effectively solved, and the torsional fatigue resistance, the corrosion resistance and the environmental adaptability are remarkably improved.

The invention discloses composite conductive powder for preparing conductive silver paste and the conductive silver paste, and particularly relates to the technical field of electronic materials.The composite conductive powder is of a double-shell core-shell structure composed of a silver metal inner core, a silicon dioxide middle coating layer and a silver nanoparticle self-assembled outer layer and is subjected to ultraviolet irradiation treatment; the conductive silver paste is based on the composite conductive powder and is matched with cerium oxide modified glass powder, graphene nanosheets, thermoplastic polyurethane resin and a dibasic acid ester solvent to form a low-temperature environment-friendly formula. The volume resistivity of the conductive silver paste is as low as 1.2 * 10 <-6 > omega.cm, the curing temperature is reduced to 120 DEG C, the content of volatile organic compounds meets the environmental protection standard, meanwhile, the tensile strength is improved by 50%, the conductive silver paste can bear 500 times of bending circulation without breakage, the adhesive force reaches the level 0 of a cross-cut method, the strict requirement of a high-performance electronic device for the conductive silver paste is effectively met, and the conductive silver paste has wide application prospects.

The invention discloses a forming device and a forming method of a high-temperature-resistant low-temperature-resistant high-toughness cable. According to the invention, based on a double-substrate synergistic system of hydrogenated nitrile rubber and polyether type thermoplastic polyurethane, and in combination with a dynamic vulcanization crosslinking technology, the cable keeps excellent flexibility and tear resistance in a wide temperature range of-60 DEG C to 125 DEG C. A three-dimensional reinforced network of nano silicon dioxide and carbon nanotubes is directionally dispersed in a matrix, and mechanical support of aramid short fibers is matched, so that the cable is endowed with bending fatigue resistance, the durability of the drag chain cable in a high-frequency torsion scene of an oil platform exceeds 30 million cycles is realized, and the service life of the drag chain cable is prolonged. The problem of breakage caused by low-temperature embrittlement and high-temperature softening of a traditional cable is fundamentally solved, the synergistic effect of the perfluoropolyether surface modifier and the composite anti-aging system enables the cable to form a stable protective layer in strong acid, strong alkali, salt mist and oil stain environments, and chemical corrosion and ultraviolet irradiation are effectively resisted.

The invention relates to the technical field of cables, and discloses a corrosion-resistant waterproof cable and a preparation method thereof. The corrosion-resistant waterproof cable sequentially comprises the conductor, the insulating layer, the shielding layer, the waterproof layer and the sheath layer from inside to outside, the waterproof layer is extruded by polyethylene, and the waterproof performance of electric materials can be improved; the sheath layer adopts modified PVC and a thermoplastic polyurethane elastomer as main raw materials, and functional aids such as a plasticizer, a heat stabilizer, a lubricant, a composite flame retardant and the like are added, so that the sheath layer is endowed with excellent corrosion resistance, flame retardance and the like. Therefore, the cable prepared by the invention has a good application prospect in a humid and corrosive environment.

The invention provides copper paste, a preparation method thereof and application of the copper paste in preparation of a solar cell, and relates to the technical field of photovoltaic cells, and the copper paste comprises the following components: a conductive material and a conductive reinforcing material; the conductive material comprises at least one of gradient micron-sized nickel-tungsten coated copper powder and micron-sized nickel coated copper powder; the conductive reinforcing material comprises at least one of a nano nickel wire and nano nickel-tungsten coated copper powder. According to the invention, the slurry formula is improved, and the conductivity, the process adaptability and the low-temperature sinterability are enhanced.

The invention discloses silver powder with coexisting submicron sheets and nano-particles and a preparation method of the silver powder, and belongs to the technical field of silver powder preparation. A silver nitrate solution is added into a dispersing agent solution, then a directional end-capping reagent solution is added, and nucleation and growth of submicron sheets and nano-particles are controlled through the types of dispersing agents, the types of directional end-capping reagents, the temperature gradient and the like. The diameter of the prepared flaky silver powder ranges from 0.1 micrometer to 1.5 micrometers, the thickness of the flaky silver powder ranges from 30 nm to 120 nm, and the flaking rate ranges from 30% to 90%. And the particle size of the spherical silver powder is 30-150 nm. According to the preparation method of the silver powder, a silver nanocrystal seed solution does not need to be prepared independently, and the silver powder is different from common silver powder with single morphology, can be used for preparing the flake-shaped and particle-shaped coexisting silver powder in one pot, and is suitable for being used as a conductive functional phase of low-temperature curing type electronic paste.

The invention relates to the technical field of conductive copper paste, in particular to conductive copper paste prepared by combining liquid nonferrous metal with graphene and a preparation method of the conductive copper paste. The preparation method comprises the following steps: weighing nano-copper coated graphene composite powder, a liquid nonferrous metal, a binder, trifluoropropyltrimethoxysilane, an auxiliary agent and copper powder, and then preparing trifluoropropyltrimethoxysilane into a dilute solution; copper powder and the nano-copper coated graphene composite powder are mixed to obtain composite powder; the liquid nonferrous metal and the composite powder are stirred to obtain metal paste; and adding a resin solution and an auxiliary agent into the metal paste to form printing paste, and then standing and curing. According to the conductive copper paste, the liquid nonferrous metal serves as a main binding phase, the defect that the welding thrust is low due to a traditional resin system is overcome, the problems of dispersion and interface compatibility are solved through cooperation of the nano-copper-coated graphene and the silane coupling agent, and finally the conductive copper paste with extremely low resistance, high stability and ultrahigh welding thrust is obtained.

The invention relates to the technical field of cables, and discloses a power shielding cable stranding device for a top drive of an oil platform and a production process, the power shielding cable stranding device comprises a supporting assembly, the upper part of the supporting assembly is provided with a wire feeding assembly, a stranding assembly, a guide assembly and a traction assembly, and the wire feeding assembly is located at the side part of the upper part of the supporting assembly; the stranding assembly, the guiding assembly and the traction assembly are transversely arranged on the upper portion of the supporting assembly along the supporting assembly, the supporting assembly comprises a bottom plate, and a first driving motor is installed on the upper portion of the bottom plate. By arranging an adjusting plate, the problem that a stranded wire is locally bent due to improper storage and carrying or material rigidity difference can be solved. Precise correction is achieved by sensing local deformation of the stranded wire and applying extrusion and drawing force, the situation that the cross section structure of the cable is not uniform due to deflection of a bent part after stranding is avoided, the structural strength of the cable is guaranteed, electric energy loss is reduced, the power transmission efficiency is improved, and the structural stability and transmission performance of the stranded cable are guaranteed.

The invention relates to the technical field of conductive materials, in particular to a high-concentration dispersion system and a preparation method thereof. The high-concentration dispersion system comprises a conductive agent, a dispersing agent, a solvent and a viscosity reduction auxiliary agent, the conductive agent is modified carbon nanotubes, the dispersing agent is modified polyvinylpyrrolidone, the solvent is N-methyl pyrrolidone or deionized water, and the viscosity reduction auxiliary agent is piperazine anhydrous; wherein the modified carbon nano tube is obtained by mixing and heating a carbon nano tube and a mixed acid solution of nitric acid and sulfuric acid, then cooling, filtering, washing, drying, then dispersing in 75% ethanol, and finally adding 3-[3-carboxyl allylamido] propyltriethoxysilane for modification; the modified polyvinylpyrrolidone is obtained by heating polyvinylpyrrolidone at 310-330 DEG C and then oxidizing the polyvinylpyrrolidone. The conductive agent content of the high-concentration dispersion system is high, the conductive agent accounts for 15%-20% of the high-concentration dispersion system by mass, and the high-concentration dispersion system is low in viscosity, high in dispersity and good in conductivity.

The invention discloses an all-solid-state composite dry conductive agent and a preparation method thereof, and belongs to the technical field of batteries. The all-solid-state composite dry conductive agent is prepared by the following steps: uniformly mixing carbon nanotubes, high-dispersion carbon black and graphene to obtain a primary mixture; then preparing a uniformly dispersed glue solution from the composite dispersant and water; and then adding the primary mixture into the glue solution, uniformly mixing, sanding, homogenizing, drying and crushing to obtain the product, the high-dispersion carbon black is obtained by oxidizing carbon black to form active groups such as carboxyl and hydroxyl on the surface of the carbon black, halogenating acyl and then reacting with lithium 2, 5-diaminobenzene sulfonate. The preparation method comprises the following steps: grafting histidine ester into carboxymethyl cellulose by using propylene glycol diglycidyl ester as a cross-linking agent, then introducing allyl-1, 3-sultone, then copolymerizing with lithium 2-acrylamido-2-methylpropanesulfonate and 3-aminobenzoic acid allyl ester protected by fluorenylmethoxycarbonyl, and then deprotecting to obtain the composite dispersant.

The invention discloses aluminum alloy cable production and processing equipment, and relates to the technical field of cable manufacturing, the aluminum alloy cable production and processing equipment comprises a base, and the base is sequentially provided with a lead frame, a lead reel and a stranding part; a driving part is arranged on one side of the lead frame, an output shaft of the driving part is connected with a rotating shaft, and the rotating shaft sequentially penetrates through the lead frame and the lead disc; the driving part is fixed on the base and can be arranged on one side, far away from the lead disc, of the lead frame; a plurality of mounting ports are formed in the lead disc, and two abutting parts are symmetrically arranged in each mounting port; two abutting parts are symmetrically arranged in the mounting opening and located on the inner walls of the sides, close to and away from the rotating shaft, of the mounting opening correspondingly. A lead ball is arranged in the mounting opening in a sliding manner, and a wire passing hole is formed in the lead ball; the technical effects that the bending degree of the cable can be adjusted according to the distance value between the wire leading disc and the wire twisting part, and the probability that the cable is not tightly twisted or the bending position is broken in the cable twisting process is reduced are achieved.

The invention discloses an electric wire and cable copper wire stranding machine, and belongs to the technical field of copper wire stranding, the electric wire and cable copper wire stranding machine comprises a rack, a winding mechanism used for winding a stranded copper wire is assembled on the rack, a material rack unit is assembled on one side, far away from the winding mechanism, of the rack, the material rack unit comprises a shaft rod installed in a first bearing seat, and an installation disc is assembled on the shaft rod; a material frame is inserted into the mounting disc by forming an inserting groove, and a driving piece is assembled at one end of the shaft rod; through the arrangement of the anti-loosening unit and the stranded wire guide frame, the rotating pay-off barrel drives the extending frame through the moving unit to push the rolling shaft to be attached to a copper wire in real time in the stranding process, so that no matter what degree the pay-off is achieved, the rolling shaft can always apply tension to the wire outlet end of the copper wire, the copper wire is kept in tension, and the copper wire is prevented from being loosened. The stranding machine is simple in structure and convenient to use, the loosening condition along with the increase of the paying-off time is avoided, the loosening condition of the stranded wire is avoided, the quality of the stranded wire is ensured, and the risk of increasing the fault of the stranding machine is avoided.

The invention belongs to the field of conductive paste preparation, and particularly discloses conductive paste containing ruthenium oxide and a preparation method of the conductive paste. The conductive paste is prepared from the following components in percentage by mass: 40 percent to 50 percent of ruthenium oxide, 3.8 percent to 5 percent of carbon nano tubes, 5 percent to 10 percent of PbO-B2O3-SiO2, 3 percent to 8 percent of ethyl cellulose, 21 percent to 28 percent of terpilenol, 9 percent to 12 percent of butyl carbitol, 0.7 percent to 1 percent of ammonium polyacrylate and 1 percent to 2 percent of dibutyl phthalate. According to the preparation method, ruthenium oxide is activated in vacuum, a mixed solvent is combined after dispersion, and a ball milling and ultrasonic dispersion synergistic process is adopted, so that the slurry is uniformly dispersed and has excellent stability. According to the invention, a ruthenium oxide-carbon nanotube-frit ternary synergistic system is constructed, and terpilenol and butyl carbitol in a specific mass ratio are taken as a mixed solvent, so that the problems of insufficient conductivity and easy agglomeration of traditional paste are effectively solved, and the method can be widely applied to manufacturing of high-precision electronic devices.

The invention discloses a cable braiding control method and system and a medium, and belongs to the technical field of cable braiding machines, and the cable braiding control method comprises the steps: S100, obtaining the order number of a to-be-produced cable, querying the process parameters of the to-be-produced cable, the process parameters of the to-be-produced cable comprise the number and diameter of monofilaments in the cable braided wires, the braiding density and the number of braiding machine spindles; s200, measuring the outer diameter of the cable core, and obtaining the real-time parameters of the outer diameter of the cable core; measuring the linear speed of cable weaving; and S300, calculating the braiding pitch of cable braiding according to the process parameters of the to-be-produced cable and the real-time parameters of the outer diameter of the cable core, calculating the braiding rotation speed according to the braiding pitch and the linear speed, and braiding the cable to form a shielding layer. According to the method, the knitting pitch can be calculated and dynamically adjusted, and the knitting wire consumption is reduced.

The invention belongs to the technical field of insulator materials, and particularly relates to an insulating busbar and a preparation method thereof. The preparation method of the insulating busbar comprises the following steps: coating glue on the surface of a busbar base material, and drying to obtain a busbar with a bonding layer; the preparation method comprises the following steps: mixing 40 to 60 parts of silicon resin, 20 to 40 parts of grafted silicon dioxide, 10 to 20 parts of aluminum oxide and 2 to 4 parts of 2, 5-dimethyl-2, 5-bis-(tert-butylperoxy) hexane, so as to obtain a sizing material; placing the busbar with the bonding layer in a mold, then adding a sizing material, and pressing to obtain an insulating busbar; the preparation method of the grafted silicon dioxide comprises the following steps: stirring m-aminobenzoic acid and 3-aminopropyltriethoxysilane for reaction to obtain a grafting solution, and adding silicon dioxide into the grafting solution for grafting reaction to obtain the grafted silicon dioxide.

The invention discloses a high-temperature-resistant flame-retardant carbon fiber cable and an intelligent preparation method thereof, and relates to the technical field of power cables, and the cable is composed of a composite bearing core, a first / second electrical isolation belt, a stranded conductor, an annular composite bearing layer, a high-temperature-resistant main insulator and a low-smoke halogen-free outer sheath. The force bearing core is formed by bundling carbon fiber micro rods, elastic reset layers are arranged between the micro rods, micro-particle friction layers are formed on the outer surfaces of the micro rods, and a stable friction-rebound interface is constructed. A fire-resistant barrier, a phase change microcapsule filling layer and a fiber bragg grating can be arranged, and fire resistance, thermal peak suppression and on-line monitoring are considered. And closed-loop control of pultrusion, surface activation, coating and on-line thickness measurement / friction test is carried out in the manufacturing process. The cable can be operated at 200 DEG C for a long time and at 250 DEG C for a short time, the residual elongation is less than or equal to 0.10%, and light weight, high strength, high temperature resistance, low smoke and flame retardance are realized.

The invention provides photovoltaic copper paste, a preparation method thereof and application of the photovoltaic copper paste in preparation of solar cells, and relates to the technical field of photovoltaic cell manufacturing, and the photovoltaic copper paste comprises gradient micron-sized copper powder, a nano conductive reinforcing material, an organic binder, glass powder, a reinforcer and an optional additive; the reinforcing agent comprises an antioxidant, a nano interface reinforcing agent, a passivating agent and an optional corrosion inhibitor; wherein the nanometer interface reinforcing agent comprises one or more of aluminum oxide nanoparticles, antimony nanoparticles and graphene quantum dots; the passivating agent is prepared from benzotriazole and a silane coupling agent. According to the improved copper paste formula, the contact resistance performance and oxidation resistance can be improved, and the uniformity of grid lines is improved.

The invention provides an aluminum alloy cable conductor preparation device and process, the aluminum alloy cable conductor preparation device comprises a bottom plate, and a turntable, a twisting disc, a threading ring and a winding assembly which are arranged on the bottom plate, and a plurality of aluminum alloy wire coils are rotatably mounted on the circumference of the turntable at equal intervals. Through cooperation of the liquid storage cavity, the conical liquid leakage hole and the plugging block in the lubricating cylinder, dynamic adjustment of line-moving liquid supply and line-stopping liquid sealing is achieved, when an aluminum alloy wire penetrates through, the ball is pushed, the plugging block is driven to move, a gap is formed between the plugging block and the liquid leakage hole, and lubricating liquid leaks to the surface of a wire body according to needs; when the wire body is paused, the spring I drives the stop block to reset and is matched with the sealing ring to realize sealing, so that waste of lubricating liquid is avoided; when the twisting disc rotates, the lubricating cylinder is synchronously driven to rotate, the distribution position of lubricating liquid in the liquid storage cavity is changed, the problem that local lubrication is interrupted due to insufficient liquid storage is effectively solved, it is ensured that multiple strands of aluminum alloy wires are evenly lubricated in the whole process, wire body abrasion is reduced, and the surface quality and mechanical strength of a twisted conductor are improved.

The invention discloses a large-section molded line conductor stranding process, and belongs to the technical field of wire and cable preparation. According to the large-section molded line conductor stranding process, three-layer distributor plate equipment and stranding process parameter combination which are coordinated are disclosed, and the three-layer distributor plate equipment comprises a front guide wheel distributor plate, a middle limiting mold distributor plate and a rear guide wheel distributor plate which are sequentially and linearly arranged on stranding equipment in the advancing direction of molded line monofilaments; wherein the front guide wheel distributor plate is located at the most upstream and is provided with a guide wheel with a fine-tuning eccentric shaft design, the middle limiting mold distributor plate is located at the center of the structure and is provided with a special-shaped limiting groove matched with the section of a monofilament, the rear guide wheel distributor plate is located at the most downstream, and a plurality of independent guide wheel structures are adopted to stabilize a formed stranded wire core. And meanwhile, the stranding quality is improved in cooperation with specific molded wire monofilament width-height ratio control and a pre-torsion angle application range, the problem of molded wire monofilament stranding dislocation is solved, and the molded wire conductor filling coefficient and roundness are remarkably improved.