4821results about "Insulating conductors/cables" patented technology

The invention relates to the technical field of cross-linked polyethylene cables, in particular to a mining cross-linked polyethylene insulated armored self-repairing cable and a manufacturing method thereof.The mining cross-linked polyethylene insulated armored self-repairing cable comprises a center conductor unit, a cross-linked polyethylene insulating layer, a shielding layer and an armored layer sequentially wrap the outer side of the center conductor unit from inside to outside, and an outer sheath layer is extruded on the outer side of the armored layer; the shielding layer comprises a semi-conductive shielding layer wrapping the outer side of the cross-linked polyethylene insulating layer, and the outer side of the semi-conductive shielding layer is wrapped with a copper strip shielding layer. By arranging the composite conductor structure in the central conductor unit and cooperating with the graphene heat dissipation filaments and the paraffin heat absorption and heat dissipation layer, the heat dissipation performance of the cable is improved, the temperature of the cable during operation is effectively reduced, faults caused by overheating are reduced, and the service life of the cable is prolonged; the armor layer and the copper strip shielding layer realize multipoint equipotential grounding through a sectional conductive adhesive tape, electromagnetic interference can be effectively shielded, and fault current diffusion is limited.

The invention discloses a longitudinal waterproof cable and a production process, and relates to the technical field of cables, the longitudinal waterproof cable comprises a cable body, the cable body comprises a cable core, a belting layer is arranged outside the cable core, a gap between the belting layer and the cable core is filled with water-blocking powder, an inner lining layer is arranged outside the belting layer, and the inner lining layer is filled with water-blocking powder. The outer portion of the inner lining layer is provided with an aluminum-plastic composite belt, the outer portion of the aluminum-plastic composite belt is provided with an outer sheath, the end portion of the outer sheath is provided with a sealing assembly, the sealing assembly is used for sealing the end portion of the cable body, and the outer sheath is sleeved with a protection assembly. The protection assembly is used for protecting the outer sheath, and the sealing assembly is matched with the protection assembly to seal the joint between the two adjacent cable bodies. The cable sheath can be effectively protected, corrosion and aging are delayed, the waterproof effect of the end of the cable is effectively improved, and water is prevented from invading from the end of the cable.

The invention discloses a preparation process of a self-repairing intelligent cable and an intelligent repairing system of the self-repairing intelligent cable. The preparation process of the self-repairing intelligent cable comprises the steps of conductor pretreatment, preparation of the inner-layer basic insulating layer, preparation of the middle intelligent regulation and control layer, preparation of the outer-layer repairing layer and preparation of the outermost-layer protective layer. The intelligent repairing system of the self-repairing intelligent cable comprises the steps of damage sensing, repairing strategy selection, repairing triggering and dynamic modeling, performance optimization and closed-loop feedback. The preparation technology of the self-repairing intelligent cable has the following beneficial effects that the preparation technology of the self-repairing intelligent cable can have efficient self-repairing capability and a long-acting protection effect in an extreme environment. The intelligent repairing system can automatically adjust a repairing strategy according to changes of environmental conditions, and it is ensured that the cable can keep good self-repairing capacity in various severe environments.

The invention discloses a preparation method of a B1-grade flame-retardant fire-resistant control cable, belongs to the technical field of flame-retardant fire-resistant cables, and aims to solve the technical problem that the mechanical strength and the fire-resistant and flame-retardant performance of an inorganic flame-retardant modified fire-resistant fire-resistant control cable in the prior art need to be further improved. The method comprises the following steps that a plurality of cable cores are arranged in parallel, gaps among the cable cores are filled with filling ropes to form filling layers, the cable cores filled with the filling layers are wrapped together through a wrapping tape, and a wrapping layer is formed outside the cable cores. According to the invention, maleic anhydride modified polyethylene is used as a phase solvent, and polyethylene is cross-linked and enhanced by modified graphite and modified polysiloxane, so that not only is the mechanical strength of the cable material effectively improved, but also the fire resistance and flame retardance of the cable material are improved.

The invention relates to a fire-resistant cable and a preparation method and application thereof. The fire-resistant cable comprises a conductor core layer, a silicone rubber insulating layer, a fire-resistant mica filling layer, a shielding layer and a fire-resistant flame-retardant sheath layer. When the magnesium hydroxide flame retardant is prepared, piperazine phytate is added and is adsorbed on the surface of magnesium hydroxide to form electrostatic repulsion or steric hindrance, so that a protective layer is constructed on the surface of a particle, and particle aggregation is prevented. In addition, after the piperazine phytate modified magnesium hydroxide is compounded with the expanded graphite and the zinc stannate, a remarkable synergistic flame-retardant effect is shown, and efficient flame-retardant and fire-resistant performance of the cable material is achieved. The fireproof filler is added in the polypropylene cable sheath layer, so that the flame retardance and fire resistance of the cable are further improved, and it is ensured that the cable does not drip in the combustion process; therefore, the cable can still keep safe and reliable performance under extreme conditions such as fire disasters and the like, and powerful guarantee is provided for personnel safety and fire rescue.

The utility model discloses a fire-resistant mica tape wrapping device, which belongs to the technical field of cable production equipment and comprises a bottom plate, a round shell is arranged in the center of the top of the bottom plate, a wire harness plate is arranged on one side of the round shell, a concave area is arranged on the outer edge of one side of the round shell, and a ring gear is adaptively arranged in the concave area. Winders used for containing mica tape coils are installed at the two ends of one side of the annular gear, a clamping cover is fixed to an opening of a concave area of the annular gear, a square shell is arranged on the side, away from the wire harness plate, of the annular gear, an opening groove is formed in the center of the square shell, a cavity is formed in the square shell, and pressing wheels used for pressing and fixing mica tapes are symmetrically arranged on the inner circumference of the opening groove. The wire harness plate is provided with a plurality of specifications, and the center of the wire harness plate is provided with a hole matched with a cable. According to the fire-resistant mica tape wrapping device, the mica tape can be automatically pressed and fixed, the manual winding procedure at the starting stage is reduced, the automatic wrapping effect is achieved, and the working efficiency is improved.

The invention relates to the technical field of power transmission, and discloses a composite single-core power cable, comprising: a composite core composed of carbon fibers, glass fibers and a resin matrix containing a self-repairing microcapsule, the self-repairing microcapsule being capable of releasing a repairing monomer and repairing a microcrack when the composite core generates the microcrack; the conductor layer is arranged around the composite core and is composed of an aluminum conductor containing nano graphene; the insulating layer wraps the conductor layer and is made of a temperature-sensitive polymer material; and the outer sheath wraps the insulating layer and is made of a waterproof corrosion-resistant material. The composite core of the cable can recover more than 90% of original strength (the loss of tensile strength after repair is only 3%, which is recovered from 580Ksi to 570Ksi) within 24 hours after microcracks (such as the depth of 10mu m) generated by mechanical stress or fatigue in the operation process, and the self-repairing mechanism does not need manual intervention or external equipment, so that the self-repairing performance is greatly improved. And the sudden failure of the traditional cable caused by micro-damage accumulation is avoided.

The invention relates to the technical field of cable preparation, in particular to an extruded insulation low-voltage power cable and a preparation method thereof.The preparation method comprises the steps that metal wires are twisted into a conductor according to preset twisting parameters, and the conductor is preprocessed; extruding an insulating layer on the surface of the pretreated conductor by using a screw extruder to obtain an insulated wire core; monitoring the diameter of the insulated wire core in real time by using a laser diameter measuring instrument, and determining the fluctuation characteristic type of the diameter of the wire core under a first preset condition; obtaining the eccentricity of the insulating layer and the void ratio between the insulating layer and the conductor; judging the qualification of the extrusion process according to the extrusion comprehensive quality index; under the condition that the extrusion process is unqualified, the qualification of the extrusion process is secondarily judged according to the insulation performance evaluation value; under the condition that the extrusion process is judged to be unqualified for the second time, an adjustment strategy of the extrusion process is determined; and after the insulated wire cores qualified in the extrusion process are twisted into a cable, an outer protective sleeve is extruded. The production efficiency and the product stability of the cable are improved.

To surely prevent short circuit accompanied by contact of a metal bar with a metal structure in its periphery.SOLUTION: An on-vehicle bus bar 1 has a metal bar 10, a fireproof tape and an insulator layer 30. The one or two or more fireproof tapes are overlapped and wound around the metal bar 10, at least the one fireproof tape is longitudinally attached thereto and wound therearound, and the metal bar 10 and the fireproof tape are coated with the insulator layer 30.SELECTED DRAWING: Figure 1

The invention relates to the technical field of silica gel cables, and discloses a silica gel cable with high reliability and high flexibility and a process thereof, and the silica gel cable comprises a conductor layer which is formed by hierarchically twisting a plurality of tinned copper wires with the diameter of 0.05-0.10 mm, and the twisting helical angle gradually changes from 25 degrees in the inner layer to 55 degrees in the outer layer; the insulating layer coats the conductor layer and comprises a silica gel material, a hydrogen-containing silicone oil cross-linking agent and a plasticizer, microcapsules with the particle size of 20-50 microns are dispersed in the silica gel material, a shell layer of each microcapsule is polyurethane, and a core layer of each microcapsule is a siloxane repairing agent containing a platinum catalyst; and a sheath layer. A hydrogen-containing silicone oil cross-linking agent in the insulating layer enables molecular chains to be cross-linked to form a net structure, the physical and chemical stability is enhanced, microcapsules are matched to endow a self-repairing function, a repairing agent is released when the cable is damaged, the self-repairing performance of the insulating layer is further guaranteed, damage is filled through a cross-linking reaction, insulation is recovered, the reliability of the cable is remarkably improved, and the service life of the cable is remarkably prolonged.

The invention relates to the technical field of wires and cables, in particular to a flexible anti-torsion control cable and a preparation method thereof.The cable comprises a cable core, a shielding layer and an outer sheath, and the shielding layer comprises a braid layer and a plurality of elastic pieces evenly distributed around the periphery of the inner sheath; any two adjacent elastic pieces are woven in the woven layer at equal intervals, so that the woven layer has radial and circumferential activity amounts at the elastic pieces, the elastic pieces are woven in the woven layer, the elastic pieces can enable the woven layer to have large deformation amount, and the shielding coverage area cannot be reduced. When the braid layer is in a bending or torsion working condition, the elastic piece is compressed and deformed, and the part releases stress, so that the bending and torsion resistance of the braid layer can be improved, and the service life of the braid layer is prolonged.

The invention discloses a high-strength cable for an industrial robot and a preparation process of the high-strength cable. The preparation process comprises the following steps: selecting a high-strength conductor material, performing multi-pass wire drawing processing on the conductor material, and twisting a plurality of fine copper wires according to a preset pitch and direction to form a conductor core; fluoroplastic is selected as a first layer of insulating material to coat the conductor core to form a first insulating layer, and modified thermoplastic elastomer particles coat the first insulating layer to form a second insulating layer; wrapping a wrapping material outside the second insulating layer by using a wrapping machine to form a wrapping layer; a sheath material extruder is provided to wrap the wrapping layer to form an outer sheath, and then cutting is carried out to obtain the high-strength cable. According to the process, material selection and structural design are innovatively combined, the double-layer insulation structure provides excellent high-temperature resistance and electrical insulation performance, friction between the inner layer and the outer sheath is effectively reduced due to application of the wrapping layer, the service life of the cable is prolonged, and therefore the high-strength cable is prepared.

The invention discloses an explosion-proof cable processing device and method, and belongs to the technical field of explosion-proof cable processing, the explosion-proof cable processing device comprises a cooling box and a heat treatment box fixed on one side of the top surface of the cooling box, and further comprises a traction roller, a traction motor, a rotating gear ring, an elastic rolling part, a rotating mechanism, a wiping roller and a movable wiping mechanism; according to the invention, the outer surface of the cable core insulating layer is subjected to movable wiping treatment of cooling water through the wiping roller, and meanwhile, the outer surface of the cable core insulating layer is subjected to axial stress elimination treatment to a certain extent; therefore, the outer surface of the cable core insulating layer is subjected to circumferential compression type stress relief treatment through the elastic rolling part, and the outer surface of the cable core insulating layer is subjected to heat treatment to relieve stress in cooperation with the heat treatment box, so that the stress relief modes of the cable core insulating layer are diversified, and the stress relief rate of the cable core insulating layer is obviously improved.

The invention relates to the technical field of radio frequency coaxial cable manufacturing, in particular to a wrapping method and system for manufacturing a radio frequency coaxial cable, and the method comprises the steps: controlling a take-up frame to pull a to-be-wrapped body made of an inner conductor and an insulating layer to an initial wrapping position at a constant speed; starting wrapping equipment to be matched with the take-up frame to wind a metal belt in the wrapping equipment onto the to-be-wrapped body according to a preset wrapping angle from the initial wrapping position so as to carry out wrapping test on the to-be-wrapped body; collecting the diameter of the to-be-wrapped body wound with the metal belt in the wrapping test; determining the surface wrapping state of the to-be-wrapped body according to the diameter; and determining a wrapping processing mode based on the surface wrapping state, and performing actual wrapping on the to-be-wrapped body according to the wrapping processing mode to form an outer conductor layer. According to the invention, signals are prevented from leaking between the metal tape and the to-be-lapped body, and the signal transmission efficiency is improved.

The invention discloses a multi-layer surface paint treatment process for an enameled wire, and relates to the technical field of enameled wire production. A multi-layer surface paint treatment process for an enameled wire comprises the steps of unwinding and stretching, annealing and softening, paint curing, inspection and winding and the like, in the paint curing process, a wire can be painted, baked and cooled through a paint coating mechanism, a drying oven and a cooling box in a paint coating device, and the surface of the enameled wire is coated with paint. And then the surface paint is conveyed to the feeding side of the painting mechanism again through the guide mechanism, so that a plurality of painting and curing procedures can be repeatedly carried out, and the coating of multi-layer surface paint is realized. Only one painting device is needed in the multi-layer surface paint coating process of the whole enameled wire, so that the requirement of production equipment for producing the enameled wire with the multi-layer surface paint on a production site can be reduced.

The invention relates to the technical field of power cables, and provides a medium-voltage fireproof cable, which comprises a conductor, and an insulating layer, an armor layer and a sheath layer which are sequentially arranged outside the conductor, the insulating layer comprises the following components in parts by weight: 70-80 parts of polyethylene, 5-10 parts of a flame retardant, 3-5 parts of a cross-linking agent, 1-2 parts of a plasticizer and 1-3 parts of an antioxidant; the sheath layer comprises the following components in parts by weight: 100 parts of polyvinyl chloride, 8-16 parts of a flame retardant, 1-2 parts of a plasticizer, 1-3 parts of an antioxidant and 5-10 parts of filler; the filler comprises silicon dioxide, inorganic fibers and tetrapod-like zinc oxide whiskers. According to the technical scheme, the problem that the strength and the aging resistance of the cable in the prior art are poor is solved.

The invention provides a moisture-resistant and high-temperature-resistant wire and a preparation method and application thereof. And each wire comprises a conductor, and a mica insulating layer, an inorganic fiber insulating layer, a high-temperature-resistant insulating paint layer, a molecular sieve moisture-resistant layer and an outer protective layer which are sequentially coated outside the conductor from inside to outside. The heat-resistant grade of the moisture-resistant and high-temperature-resistant wire can reach 600 DEG C; the characteristics of specific adsorption of the nanoscale molecular sieve on water vapor and desorption in a heating state are combined, so that the water vapor blocking function is achieved in a high-humidity environment, desorption can be achieved at a high temperature to remove residual water molecules, insulation failure caused by water vapor permeation can be reduced, the reliability is greatly improved, and the service life is greatly prolonged; good insulation performance can still be maintained after high-frequency vibration; the cable can be used in a high-temperature, high-humidity and high-frequency vibration environment, and the high-temperature resistance, the moisture resistance and the vibration resistance of a signal or power transmission wire are improved.

The present invention relates to the technical field of wires and cables, and in particular to a high-temperature and high-voltage cable for an energy storage device and a manufacturing method thereof, comprising: a plurality of wire cores, a flame-retardant filling layer, a sheathing layer, an armor layer and an outer sheath, wherein the wire core comprises a conductor with a circular cross-section, the outer side of the conductor is coated with a protective layer, a gap filling layer is provided between the conductor and the protective layer, and the gap filling layer is formed by filling a plurality of matrices provided with a conductive skin layer and a phase-change heat storage inner layer; the matrix can fill the cuts formed on the outer side of the conductor due to twisting, and the conductive skin layer enables the gap filling layer to conduct electricity, thereby balancing the electric field and avoiding local discharge, and at the same time, through the heat absorption and heat release of the phase-change heat storage inner layer, the heating and cooling rates of the conductor can be slowed down, thereby reducing the influence of high-frequency thermal expansion and contraction on the material, and avoiding the formation of a gap between the conductor and the protective layer due to thermal expansion and contraction.

The invention discloses a wrapping machine for producing a waterproof tape for a submarine cable, and belongs to the technical field of cable manufacturing. The device comprises a fixed plate, the side wall of the fixed plate is rotationally connected with a rotating plate, the outer side of the rotating plate is fixedly sleeved with a fixed gear ring, a transmission gear meshed with the fixed gear ring is installed above the fixed gear ring, a motor is fixedly installed on the rear side of a supporting shell, and the motor is fixedly connected with the transmission gear through an output rod. And the inner side wall of the rotating plate is fixedly connected with a fixed cylinder through a bracket rod. According to the waterproof tape winding device, when a waterproof tape is wound, structures such as a fitting roller rotate along with rotation of a rotating plate, all the waterproof tape is pressed on a cable through the fitting roller, gaps between the cable and the waterproof tape are avoided, meanwhile, when the waterproof tape is wound on the cable, a mounting roller can rotate, and under the action of a transmission structure, the waterproof tape is wound on the cable through the mounting roller. Therefore, the effect of the laminating roller is improved, and dust on the surface of the cable can be cleaned.

An apparatus for the extrusion of a solid wire into a resin or paste is disclosed. The apparatus consists of two main parts including an adapter for constraining the wire until mixing with the resin or paste (‘wire injector’), and a motor-driven gear system that feeds the wire into the injector (‘wire extruder’). With this system, a bare wire can be extruded allowing for the creation of lead-in / lead-out sections, or for use with a resin or paste without an inherent curing, drying, or solidifying mechanism. Additionally, this apparatus allows for the extrusion of small (30-40 AWG) wires, enabling unique applications such as the injection of a resistive wire where smaller diameter wires are advantageous for minimized electrical or thermal overhead.

The invention discloses a preparation process optimization method and system for a tensile flame-retardant fireproof power cable, and relates to the technical field of intelligent control and optimization systems.The method comprises the step that optimization of the preparation process of the power cable is achieved by building an intelligent control platform. The method comprises the following steps: firstly, analyzing a preparation process, creating a twin process database, carrying out balance optimization according to preparation requirements, and establishing an optimization fitting scheme; and the preparation process is optimized through inter-process association identification and linkage response network. And the platform executes production based on the fitting scheme, collects data in real time and feeds back the data to the central processing center. And the central processing center generates real-time linkage response after processing the data, and establishes a self-optimization feedback mechanism. The technical problems of insufficient process control precision and unstable production process in the existing power cable preparation process are solved, and the technical effects of improving the process control precision and enhancing the stability of the production process are achieved.

The invention discloses a crosslinked polyethylene reinforced high-strength insulating aerial cable, and belongs to the technical field of crosslinked polyethylene cable materials.The crosslinked polyethylene reinforced high-strength insulating aerial cable is prepared by the steps that hydroxyl is introduced to nano boron nitride powder, then amino is grafted through KH-550, nano alpha-Al2O3 powder is modified through gamma-glycidyl ether oxypropyl trimethoxy silane, and the cross-linked polyethylene reinforced high-strength insulating aerial cable is obtained; the preparation method comprises the following steps: preparing low-density polyethylene, compounding the low-density polyethylene with aminated nano boron nitride powder to form nano composite powder, improving the interface bonding force between the low-density polyethylene and the nano composite powder, carrying out melt blending on the low-density polyethylene and the nano composite powder to improve the dispersity of the nano composite powder in the low-density polyethylene, and carrying out nucleophilic acyl substitution reaction to obtain a fluorine-containing modified monomer. The nano boron nitride powder and the nano alpha-Al2O3 powder are subjected to a cross-linking reaction under the initiation action of an initiator and then coat the exterior of the thermal insulation layer, and the nano boron nitride powder and the nano alpha-Al2O3 powder are bridged through siloxane bonds to form a three-dimensional heat-conducting network, so that the heat resistance of the outer insulating layer is improved.

A low-deviation flat transposed cable for an extra-high voltage matching reactor, and a manufacturing process. The low-deviation flat transposed cable for an extra-high voltage matching reactor comprises a flat transposed wire strand and a lapped insulating layer, wherein the flat transposed wire strand comprises n (n is an even number and n≥6) film-wrapped single round wires, which are formed into a dual-layer arrangement structure by means of stranding, transposition and compression according to a certain pitch, a certain stranding direction and a certain angle. Stranding, transposition and compression process equipment comprises three device modules such as a stranding and transposition device, a cam pre-loading device and a four-roller compression device, which are sequentially arranged in series and respectively complete an initial forming process, a pre-setting process and a final shaping process of the flat transposed wire strand during the processing and forming process of the flat transposed cable. Taking into consideration the structural characteristics and product requirements of the low-deviation flat transposed cable for an extra-high voltage matching reactor, a targeted manufacturing process and targeted process equipment are designed, wherein the process principle is scientific, the equipment is prominently advanced, and the production line has a relatively strong flexible manufacturing capacity.

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.

A high-voltage cable (1) comprising a hollow conductor (2), characterized in that an inner tube (3) is arranged inside the hollow conductor (2), and a first electrically insulating layer (4) is arranged between the innertube (3) and the hollow conductor (2), wherein said first electrically insulating layer (4) is in direct contact with the entire outer surface of the inner tube (3) and the entire inner surface of the hollow conductor tube (2), and a method (100) of manufacture of the cable.

The invention provides a production process of an enameled wire and an enameled round aluminum wire, and relates to the technical field of enameled wire production, the production process of the enameled wire comprises the following steps: material selection: selecting an aluminum rod wire with a preset aluminum content as a base material; cleaning: cleaning oil stains and impurities on the surface of the aluminum rod wire; painting: coating the cleaned aluminum rod wire with an insulating paint liquid with a preset paint film thickness; and baking: baking the aluminum rod wire coated with the insulating paint liquid so as to generate a paint film with insulating property on the surface of the aluminum rod wire. Through multiple processes such as material selection, cleaning, painting and baking, the aluminum rod wire rod with the preset aluminum content is selected as a base material, oil stains and impurities on the surface of the aluminum rod wire rod are cleaned, then the cleaned aluminum rod wire rod is coated with the insulating paint liquid with the preset paint film thickness, and finally the aluminum rod wire rod coated with the insulating paint liquid is baked. Therefore, the mechanical strength, the electrical performance and the heat resistance of the enameled round aluminum wire are improved.

Disclosed in the present invention are an anti-aging fireproof power cable and a manufacturing method therefor, comprising: first, extruding an insulating material outside a conductor to form an insulating layer, thereby producing a wire core; stranding a plurality of wire cores into a cable core; then, extruding composite gel on the surface of the cable core to form a gel layer; forming a polyvinylidene fluoride coating on the surface of the gel layer by means of a plasma discharge technology; and finally, coating the surface of the polyvinylidene fluoride coating with an armor layer, thereby obtaining an anti-aging fireproof power cable. The power cable obtained in the present invention has excellent aging resistance and a good fireproof effect, can satisfy requirements for long-term use, and exhibits higher safety.

The invention relates to the technical field of wire and cable manufacturing, in particular to a high-flexibility low-smoke fire-fighting power cable and a preparation method thereof. The cable sequentially comprises a cable core, a shielding layer and an outer sheath layer from inside to outside, the outer sheath layer is prepared from the following preparation raw materials: 60 to 65 parts of methyl vinyl silicone rubber, 12 to 15 parts of ethylene propylene diene monomer, 8 to 10 parts of linear low-density polyethylene, 5 to 6 parts of cross-linking agent, 20 to 22 parts of flame retardant, 6 to 8 parts of reinforced flame-retardant filler, 20 to 25 parts of modified heat-conducting filler, 1.2 to 1.5 parts of coupling agent, 1.3 to 1.5 parts of antioxidant, 3 to 3.5 parts of lubricant, 2 to 2.5 parts of vulcanizing agent and 0.6 to 0.8 part of accelerant. The outer sheath layer of the high-flexibility low-smoke fire-fighting power cable prepared by the invention has excellent mechanical strength, toughness, heat-conducting property, high temperature resistance and flame retardant property, so that the high-flexibility low-smoke fire-fighting power cable has higher reliability and safety in fire-fighting power supply occasions.

The invention discloses a wrapping machine for photoelectric hybrid cable production, and relates to the technical field of wrapping devices.The wrapping machine is characterized in that a wire inlet frame is arranged on one side of a base, a wire inlet hole for wire inlet is formed in the wire inlet frame, a wire guiding frame is installed in the middle of the base, a wire guiding pipe is arranged on the wire guiding frame, and a wire winding frame is arranged at the other end, away from the wire guiding frame, of the base; the wire inlet frame is provided with a wrapping disc, a worm is connected to a center shaft of the wrapping disc, a wire leading pipe is arranged at the center shaft of the wrapping disc, a plurality of fixing plates are arranged on the wrapping disc in an annular array mode, worm wheels are rotationally connected into the fixing plates, a connecting plate is arranged on one side of each worm wheel, a wrapping cylinder is connected to the end, away from the corresponding worm wheel, of each connecting plate, and the wrapping cylinders are rotationally connected with the connecting plates; the device solves the problems that in the prior art, threaded holes are inconvenient to fix, the wrapping angle is inconvenient to adjust, a wrapping tape cannot be wound according to a fixed angle, different threaded holes need to be formed for angle adjustment, the time cost is large, and the overall photoelectric hybrid cable wrapping efficiency is affected.

The invention relates to the technical field of wire production equipment, in particular to production equipment and a preparation method of a wear-resistant anti-aging electronic connecting wire, the production equipment comprises a wire extrusion molding machine body, a gear transmission box and a charging barrel are fixedly mounted at the upper end of the wire extrusion molding machine body, and a charging barrel heater is mounted outside the charging barrel; a threaded rod piece is movably mounted in the charging barrel; the automatic opening device has the beneficial effects that through the design of the feeding linkage mechanism, it can be guaranteed that the discharging pipe is opened, meanwhile, the port of the machine head connector is automatically opened, production integration of the extruder is achieved, the production procedure is simplified, meanwhile, energy is saved, and in cooperation with the arrangement of the connecting and cleaning mechanism, the production efficiency is improved. According to the feeding device, the feeding linkage mechanism and the cleaning mechanism are combined to scrape and stir materials in the middle section of the feeding area and the melting area in the charging barrel, so that material adhesion caused by temperature difference is prevented, and waste materials in the charging barrel can be conveniently cleaned by means of combination of the feeding linkage mechanism and the cleaning mechanism after the machine head connector is detached.