10777results about "Cable/conductor manufacture" patented technology

The invention relates to the technical field of cable manufacturing, in particular to a cabling machine self-adaptive twisting control method based on multi-dimensional tension feedback, which comprises the following steps of: 1, configuring a phase marking device on a twisting main shaft to generate a periodic reference signal; 2, performing multi-wire dynamic coupling analysis on the pressure distribution characteristics; 3, constructing a multi-dimensional feature space containing a real-time process state and a historical fault mode; 4, establishing a stranding pitch dynamic prediction model according to the trend component of the stability coefficient; and step 5, monitoring the pressure distribution abrupt change rate, the frequency domain migration rate and the balance degree index abnormity in real time, and when the pressure distribution abrupt change rate, the frequency domain migration rate and the balance degree index abnormity cooperatively exceed a dynamic threshold value, executing hierarchical control strategies including progressive speed reduction, pretension balance and a safe shutdown sequence. The tension and strain in the twisting process are monitored in real time and dynamically adjusted, so that the stability of the twisting process is effectively improved, and the quality problem caused by non-uniform tension or overlarge strain is reduced.

The invention discloses silver-nickel conductive paste for a BC battery and a preparation method of the silver-nickel conductive paste, and belongs to the technical field of photovoltaic batteries. The silver paste comprises the following raw materials in percentage by weight: 39-69% of micron silver powder, 20-50% of modified nickel, 2-6% of glass powder, 0.1-10% of a dispersing agent, 0-1% of silicone oil and the balance of an organic carrier, the modified nickel is simple substance nickel powder subjected to modification treatment, and the modification treatment mode is surface organic modification and ball milling modification or surface inorganic modification and ball milling modification. The nickel powder is adopted to replace part of silver powder, the prepared conductive silver nickel paste is used for a BC battery, the cost is remarkably reduced, the reliability is high, and the conversion efficiency is superior to or equivalent to that of traditional all-silver electrode paste.

The present invention relates to the technical field of cable production, and discloses a cable twisting machine, including a base plate, on which a motor, a conductor frame, a wire dividing wheel, a wire lead wheel and a combining mold are arranged, a rotating shaft is fixedly mounted on the output shaft of the motor, and the rotating shaft passes through the conductor frame, the wire dividing wheel and the wire lead wheel respectively, a cable is arranged on the conductor frame, and the cables are respectively twisted into cables through the wire dividing wheel and the wire lead wheel in the combining mold, a through hole is arranged in the wire dividing wheel, and a first connecting frame and a second connecting frame are respectively arranged in the through hole, and a fixed wheel is arranged below the first connecting frame. In the present invention, when the cable breaks and returns, the fixed wheel instantly reverses to trigger a reverse limiting mechanism, and the downward movement of the stabilizing frame in the mechanism can form a U-shape with two movable wheels, which can block the cable from splashing out of the wire dividing wheel, and avoid the cable from being entangled in the machine due to the huge rebound force after the breakage, and prevent the injury to the staff.

The invention discloses low-dielectric photosensitive polyimide resin as well as a preparation method and application thereof. The invention discloses a low-dielectric photosensitive polyimide resin for a flexible copper-clad circuit board, and aims to provide the low-dielectric photosensitive polyimide resin for the flexible copper-clad circuit board, the polyimide resin provided by the invention has low dielectric constant and is more beneficial to reduction of electric energy loss, and the technical scheme is as follows: after a photosensitive monomer is copolymerized with dianhydride and diamine, the low-dielectric photosensitive resin is obtained through imidization; the chemical structural formula is # imgabs0 #, and belongs to the technical field of high polymer materials.

The invention discloses an extruder control system for cable protection pipe production, and relates to the technical field of cable protection pipe processing. Comprising a sensor module used for collecting operation parameters of the extruder, the operation parameters comprise the charging barrel temperature, the machine head temperature, the extrusion pressure, the screw speed and the traction speed, and a control module connected with the sensor module and used for receiving the operation parameters and generating a control instruction based on preset control logic and algorithm. A fuzzy self-adaptive PID algorithm is adopted for temperature control, nonlinearity and time-varying properties of extrusion temperature control can be adapted, the temperature control precision is improved, and the influence of temperature fluctuation on material extrusion is reduced, so that the quality of a cable protection pipe is improved; interference factors such as material characteristic changes can be effectively handled, stable control over extrusion pressure is achieved, and the production quality and production efficiency of the cable protection pipe are guaranteed.

The invention discloses a high-solid-content single-walled carbon nanotube aqueous conductive slurry formula composition and a preparation method thereof, belonging to the technical field of conductive slurry. The raw materials include single-walled carbon nanotube powder, dispersant, dispersing aid, pH regulator and deionized water. The invention innovatively proposes to shorten the single-walled carbon nanotube powder with the aid of a three-roll grinder, grind the single-walled carbon nanotube powder, the dispersant, the dispersing aid and the like into fibers of less than 10 μm under the forward shear force of the three-roll grinder, and the van der Waals force between the shorter single-walled carbon nanotube bundles is relatively weak and easier to be opened, so that the homogenization pressure of the subsequent high-pressure microfluidizer is ≤1000 bar, and the single-walled carbon nanotubes are uniformly dispersed under a relatively low homogenization pressure. While opening the single-walled carbon nanotube bundles, the problem of damage to the length size of the carbon nanotubes under a higher homogenization pressure is avoided, thereby ensuring the conductivity of the high-solid-content single-walled carbon nanotube aqueous conductive slurry formula composition.

The invention discloses low-temperature curing type conductive silver-coated copper slurry for a photovoltaic cell and a preparation method of the low-temperature curing type conductive silver-coated copper slurry, and belongs to the technical field of metallization of photovoltaic cells. The silver-coated copper paste comprises the following components in percentage by mass: 50-80% of micron spherical silver-coated copper powder, 5-30% of submicron spherical silver powder, 1-15% of micron flaky silver-coated copper powder, 2-20% of micron flaky silver powder and the balance of an organic carrier, and the organic carrier comprises the following components in percentage by mass: 2-5% of epoxy resin and 0.5-1.5% of auxiliary resin. According to the silver-coated copper paste and the preparation method thereof, the silver-coated copper paste with good comprehensive performance such as conductivity, printability, thixotropy and weather resistance is prepared by optimizing the raw material ratio and combining a proper preparation method, so that the silver-coated copper paste has more comprehensive performance in the subsequent use process, and the use performance of an HJT photovoltaic cell is finally improved.

A production device for high-quality corrosion-resistant steel core aluminum stranded wire, comprising a frame stranding machine (1), an electrolyte tank 1 (2), a roller (3) and an electrolyte tank 2 (4) arranged in sequence from top to bottom. The frame stranding machine (1) is arranged vertically to strand an aluminum conductor (6) on a steel core (5). The electrolyte tank 1 (2) contains a cylindrical electrode 1 (7) and an electrolyte. The cylindrical electrode 1 (7) has openings at both ends and is placed vertically with the steel core (5) as an axis. The stranding part is located in the cylindrical electrode 1 (7). The production device for high-quality corrosion-resistant steel core aluminum stranded wire of the present invention places the frame stranding machine vertically and surrounds the stranding part with the cylindrical electrode 1, so that the distance between the steel core and the aluminum conductor and the cylindrical electrode 1 at the stranding part is roughly equal, and the steel core and the aluminum conductor at the stranding part are immersed in the electrolyte at the same depth, so that the ceramic film layer formed on the surface of the steel core and the aluminum conductor is more uniform, which can greatly improve the overall corrosion resistance of the steel core aluminum stranded wire.

A cable-stranding table, comprising a stranding worktable and a support frame arranged at the bottom of the stranding worktable, wherein at least two stranding assemblies are arranged on the stranding worktable in a cable core running direction; each stranding assembly comprises two stranding discs; a plurality of cable core holes allowing cable cores to pass through are formed in the stranding discs; a first fixing plate and a second fixing plate are provided at a cable inlet end and a cable outlet end of the stranding worktable, respectively; a cable separator is provided on the first fixing plate; and a cable core hole allowing the cable core to pass through is formed in the cable separator. The present invention enables stranding of the cable core, thereby making the process convenient and fast.

The invention relates to the technical field of taping machine equipment, and particularly discloses a self-adhesive wear-resistant aluminum foil mylar tape longitudinal wrapping taping machine which is used for solving the problems of poor wear resistance and poor taping quality in the prior art. Comprising a base, a supporting vertical plate is vertically arranged at the upper end of the base, a winding penetrating hole allowing a cable A to penetrate through conveniently is formed in the supporting vertical plate, a winding disc is rotationally arranged on the outer side of the winding penetrating hole, the winding disc is connected with a winding driving piece used for driving the winding disc to rotate, and an aluminum foil belt roller is arranged at the end of the winding disc; an aluminum foil belt is wound on the aluminum foil belt roller, and an installation assembly used for fixing the aluminum foil belt roller is arranged on the winding disc. The aluminum foil tape is designed according to existing requirements, the wear-resistant layer is arranged on the outer side face of the aluminum foil tape, and the bonding layer is arranged on the inner side of the aluminum foil tape, so that the aluminum foil tape better wraps the outer side of the cable A, and the protection effect of the cable A is improved.

The invention discloses an intelligent cooperative control method and system for cable twisting, and relates to the technical field of intelligent control. The method comprises the following steps: carrying out data acquisition on a plurality of cable stranding devices to obtain a plurality of device operation data sets; determining twisting process parameters of the target cable, and performing twisting analysis to obtain a plurality of twisting characteristics; performing control interaction on the plurality of cable twisting devices, and determining cable twisting process demand information according to interaction parameters; traversing a plurality of stranding features to perform cooperative calculation, and formulating a cable stranding cooperative strategy; and performing real-time monitoring on the plurality of cable stranding devices by simulating the execution of the cable stranding cooperation strategy, generating a simulation stranding monitoring result, and dynamically updating the cable stranding cooperation strategy according to the simulation stranding monitoring result to perform intelligent cooperative control on the plurality of cable stranding devices. The technical problems of low stranding efficiency and unstable quality caused by poor collaboration of cable stranding equipment in the prior art are solved, and the technical effect of improving the cable stranding quality and efficiency is achieved.

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.

The invention provides conductive paste for a heterojunction solar cell and a preparation method of the conductive paste, and belongs to the field of conductive paste. The spherical nano-silver, the silver nanowires and the silver nanosheets are introduced, a three-dimensional conductive network is formed through three metal shapes, the conductivity of the paste is remarkably improved, high stability is kept in long-term use through the synergistic effect, and degradation of the conductivity is avoided; the carbon nanotubes are modified through mixed acid and a coupling agent, so that the dispersity is improved, the interface bonding force is enhanced, and the conductivity and mechanical strength of the slurry are improved; according to the graphene, the dispersity and compatibility are improved through introduction of sulfydryl, and the conductivity is restored through reduction of sodium borohydride; silver-coated silicon carbide is used as a filler to improve conductivity, retain hardness of silicon carbide, enhance wear resistance of the slurry and prolong service life; through the synergistic effect of the modified carbon nanotubes, the modified graphene and the silver-coated silicon carbide, the paste shows excellent performance in the aspects of conductivity, thermal stability and mechanical strength.

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 utility model discloses an aluminum alloy conductor twisting and tensioning device, which relates to the technical field of aluminum alloy conductors and comprises a bottom plate, a discharging mechanism, a fixing frame, a traction mechanism, a supporting frame and a winding mechanism are mounted on the bottom plate, a wire distributing disc and an adjusting unit are mounted on the discharging mechanism, a twisting mechanism is mounted on the fixing frame, and an anti-falling unit is mounted on the supporting frame. The device has the beneficial effects that the tension of a wire before twisting is judged through the visual detection mechanism, the position of a first lantern ring on a transmission rod is adjusted through a first telescopic mechanism, a guide ring and a trapezoidal sliding piece, and the inclination degree of one end of the transmission rod is adjusted through the first lantern ring; the positions of the mounting seat at the other end of the transmission rod and the second lantern ring are adjusted, so that the second lantern ring drives and tensions the wire before stranding and adjusts the state of the wire, the tensity of the stranded wire is improved, the wire can be better stranded, and the stranding quality of the wire is ensured.

A sulfide solid electrolyte, which is able to adjust the morphology unavailable traditionally, or is readily adjusted so as to have a desired morphology, the sulfide solid electrolyte having a volume-based average particle diameter measured by laser diffraction particle size distribution measurement of 3 μm or more and a specific surface area measured by the BET method of 20 m2 / g or more; and a method of treating a sulfide solid electrolyte including the sulfide solid electrolyte being subjected to at least one mechanical treatment selected from disintegration and granulation.

The invention relates to the technical field of cables, and provides an ultraviolet-resistant photovoltaic cable which sequentially comprises a conductor, an insulating layer, a lining layer, a shielding layer and an outer sheath from inside to outside, and the outer sheath is prepared from the following raw materials in parts by weight: 35-45 parts of chloroprene rubber, 20-25 parts of ethylene propylene rubber, 25-35 parts of a flame retardant, 1-3 parts of a vulcanizing agent, 3-5 parts of an antioxidant, 0.8-1.2 parts of an ultraviolet absorbent, 3-5 parts of a lubricant and 15-25 parts of reinforcing filler; the reinforcing filler comprises lignin fibers and nano titanium dioxide, and the mass ratio of the lignin fibers to the nano titanium dioxide is (1: 5)-(5: 1). According to the technical scheme, the problems of poor mechanical property and ultraviolet resistance of the photovoltaic cable in the prior art are solved.

The invention relates to the technical field of cable production and processing, and provides a tension balancing device and a balance adjusting method for a cable shielding layer wrapping machine, and the device comprises a wrapping mechanism which is used for winding a copper strip to the periphery of a cable core wire; the tension adjusting mechanism is used for adjusting the tension of the copper strip in the winding process; the balance adjusting mechanism is used for synchronously adjusting the winding angle of the copper strip in the tension adjusting process; the tension adjusting mechanism comprises a driving assembly and a tension adjusting assembly, the tension adjusting assembly comprises a fixing box, and a rack is slidably connected to the upper end of the inner right side of the fixing box. Through mutual cooperation of a driving assembly and a tension adjusting assembly in the tension adjusting mechanism, when the copper strip on the periphery of the collecting disc is reduced, the tension on the copper strip can be kept unchanged, and then the situation that when the copper strip is reduced, the tension of a second limiting wheel on the copper strip is increased, and consequently the copper strip is broken is avoided.

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 relates to a high-voltage cable accessory and cable corrugated aluminum sheath automatic lead coating machine, which comprises a fixing unit, a rotary positioning unit, an operation system and a control module, and is characterized in that the operation system is mounted on the rotary positioning unit, the rotary positioning unit is mounted on the fixing unit, and the fixing unit fixes and clamps a cable; the control module controls the fixing unit, the rotary positioning unit and the operation system to conduct lead coating on the high-voltage cable accessory and the cable corrugated aluminum sheath, the lead coating quality and efficiency can be improved, and automatic operation of the lead coating process is achieved. The invention further provides a lead enameling process using the automatic lead enameling machine for the high-voltage cable accessory and the cable corrugated aluminum sheath, the operation is simple and convenient, and the defect that the manual lead enameling efficiency of the high-voltage cable accessory and the cable corrugated aluminum sheath is low is overcome; and the defects of poor lead coating and safety accidents caused by uneven levels of cable accessory installation personnel and the influence of the field operation environment on the technology are overcome.

The invention relates to a glass composition, inorganic glass powder and a preparation method thereof, and automobile pressed glass conductive silver paste and a preparation method thereof. The glass composition comprises a first glass composition and a second glass composition, wherein the first glass composition and the second glass composition respectively comprise Bi2O3, SiO2, B2O3, Sb2O3, Na2O, Al2O3, K2O, Li2O and CaO; the glass is prepared from the following raw materials: Bi2O3, B2O3, ZnO, SiO2, CaF2, Al2O3, MgO and Sb2O3. The preparation method of the inorganic glass powder comprises the following steps: mixing two glass compositions, heating, melting, quenching with water, and ball-milling into powder. The preparation method of the conductive silver paste for the automobile pressed glass comprises the following steps: mixing the organic carrier, the inorganic glass powder, the functional additive and the spherical silver powder, and grinding to obtain the conductive silver paste for the automobile pressed glass. Compared with the prior art, the silver paste has the advantages of being low in sintering process window, good in acid and alkali resistance, welding performance, wear resistance and ink matching performance and the like by adopting a silver powder system of a polycrystalline-gap structure, low-melting-point glass powder and various special functional auxiliaries, and the technical requirements of'pressing method 'process production can be met.

The invention discloses a low-temperature silver-coated copper conductive silver paste suitable for heterojunction solar cell nickel screen printing, which comprises the following components in percentage by mass: 10-70% of spherical silver-coated copper powder, 15-80% of submicron silver powder, 0.5-5% of nano silver powder, 1-6% of resin, 0.2-4% of assistant and 0.5-3% of solvent, wherein the resin comprises epoxy resin with the epoxy equivalent of 200 to 260 and rubber toughened epoxy resin with the weight-average molecular weight of 10000 to 20000. Wherein the epoxy resin with the epoxy equivalent of 200-260 provides ink passing performance, and nickel net narrow line width printing is guaranteed; the high-molecular-weight resin with the weight-average molecular weight of 10000-20000 is used as the thixotropic agent, so that the printing line type and the height-width ratio are ensured. The line width of a heterojunction battery prepared by matching the slurry with nickel net narrow line width printing can be as low as 18 microns, and the conversion efficiency of a battery piece is improved on the basis of greatly reducing the silver consumption of a single piece.

The invention discloses an optical cable capable of being remotely inspected and a preparation method and application thereof, and belongs to the technical field of optical cable preparation, the optical cable comprises an optical unit, an electric unit and an outer sheath, the optical unit is arranged in a containing space of the outer sheath, the electric unit is connected with the outer sheath, the arrangement direction of the electric unit is parallel to the axis of the outer sheath, and the optical cable is arranged in the containing space. And the positive excess length of the electrical unit relative to the outer sheath is 0.05%-0.8%. According to the optical cable capable of being remotely inspected, when the optical cable is coated with ice, the electric unit and the outer sheath are synchronously stretched, the electric unit cannot be stretched and thinned due to the existence of the positive excess length, after the stretched length of the outer sheath makes up the excess length of the electric unit, the electric unit is stretched along with the outer sheath, and the increase of wave impedance of the electric unit can be detected through a TDR detection technology; an optical cable maintainer can maintain the optical cable in advance when the wave impedance of the electric unit is increased, the ice on the surface of the optical cable is removed, and the problem of cable breakage caused by continuous accumulation of ice and snow is avoided.

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 wear-resistant tensile power cable and a preparation method thereof, and relates to the technical field of power cables, the wear-resistant tensile power cable comprises a wire core, the interior of the wire core is a stranded wire structure formed by stranding a plurality of copper wires, the exterior of the wire core is coated with a crosslinked polyethylene insulating tube, and a centering assembly is fixedly installed on the outer surface of the wire core. According to the wear-resistant tensile power cable and the preparation method thereof, the hemp rope is filled in the special-shaped pipe for centering and stabilizing the whole structure, the silica gel coating is filled in the special-shaped pipe, an inner layer centering structure is formed after the coating is shaped, and the cable particles easy to flow are filled between the inner side surface of the special-shaped pipe and the special-shaped pipe. The cable particles improve the overall stability of the cable, and at the same time, when the outer layer protection structure is broken by tensile force, the inner layer centering structure is not damaged by tensile force, thereby solving the problem that the tight fixed connection between the outer layer protection structure and the inner layer centering structure of the cable easily causes the overall cable to be broken by tensile force and causes serious accidents.

The invention discloses a rat-proof and termite-proof flame-retardant medium-voltage cable and a preparation method thereof, and belongs to the technical field of cables. The cable is composed of a conductor, a conductor shielding layer, an insulating layer, a metal shielding layer and a protective sleeve which are sequentially arranged from inside to outside. Linear low-density polyethylene is taken as a raw material of the protective sleeve material, and polyethylene molecular chains are mutually connected through irradiation crosslinking to form a three-dimensional network structure, so that the cable is endowed with excellent mechanical strength and excellent comprehensive performance; by modifying the nano silicon nitride, the agglomeration phenomenon is obviously reduced, the mechanical strength and wear resistance of the cable are enhanced, and the rat-proof and termite-proof effects of the cable are improved; the prepared multi-effect flame retardant contains multiple functional groups, can significantly enhance the flame retardance, mechanical strength and rat-proof and termite-proof effects of the cable, and has long and stable performance. Therefore, the prepared cable is high in mechanical strength and good in wear resistance, has stable and efficient flame retardance and rat-proof and termite-proof effects, and has important application value in the technical field of cables.

The invention discloses a preparation method of a rapidly-formed Janus structure stretchable electrode, an electrode material system is a material system composed of thermoplastic polyurethane (TPU), liquid metal particles and N, N-dimethylformamide (DMF), and electrode forming comprises two self-assembly processes. In the first self-assembly process, the liquid metal particles rapidly settle to form a Janus structure under the action of gravity; and a second self-assembly process: quickly dissolving DMF in water under the action of phase separation, and quickly separating out TPU to form a porous structure. The whole electrode forming process is about 15 seconds, which is the fastest stretchable electrode film forming process so far. The electrode has high conductivity, high stretchability and insensitivity to tensile strain, the electrode can spontaneously form a Janus structure with one conductive side and the other insulated side so as to achieve a self-protection structure for the whole electrode, and the electrode is expected to be applied to the flexible electronic fields of electronic skin, human body information detection, stretchable electronic devices and the like.

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.