1420results about "Power cables with screens/conductive layers" patented technology

The invention relates to the technical field of cables, and discloses a multi-layer composite wrapped high-temperature-resistant anti-aging cable which sequentially comprises a conductor, an insulating cable core, a shielding layer, an outer insulating layer, a fireproof layer, a heat insulation layer, a buffer cushion layer, an armor layer, an anti-aging layer and an outer sheath layer from inside to outside. The fireproof layer is formed by alternately laminating synthetic mica tapes and ceramic boron silicone rubber tapes, a reliable fireproof barrier is formed, and the heat insulation layer is arranged to achieve efficient heat insulation and stable structure through cooperation of gradient pore nano aerogel, ceramic silicone rubber round rods and phase change capsules. The buffering cushion layer is combined with the composite layer, the aluminum oxide hollow ball array and the composite capsule, so that the mechanical buffering and auxiliary heat insulation functions are achieved; the armor layer is woven by stainless steel fibers, the mechanical protection capability is improved, and the anti-aging layer is of a double-layer structure composed of montmorillonite composite fluororubber and an anti-oxidation layer, so that thermal oxidation aging is delayed.

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 an environment-friendly safe high-voltage smooth aluminum sheath power cable, which relates to the technical field of power cables and comprises a conductor mechanism, and a water blocking mechanism is arranged on the outer surface wall of the conductor mechanism. In the use process, under the action of the waterproof film, a blocking effect can be achieved on permeating rainwater, then under the action of the water blocking tape, the permeating rainwater can be absorbed, gelatinous substances are formed to block a water seepage channel, then the rainwater is further absorbed and blocked through the water absorption expansion materials placed in the containing grooves, and therefore the rainwater seepage effect is improved. Meanwhile, rainwater can be fully absorbed through a water blocking material in the storage box, the rainwater is prevented from continuously permeating into the cable, and the rainwater can be blocked under the action of a waterproof sleeve, so that the cable is protected, the situation that the cable is short-circuited and spontaneously ignited due to the influence of the rainwater during power transmission is avoided, and the service life of the cable is prolonged. And the maintenance cost of the cable is greatly reduced.

The invention discloses a crosslinked polyethylene insulated submarine power cable, which relates to the technical field of submarine power cables, is used for carrying out power transmission in a deep seabed, and comprises a cable body, and the cable body sequentially comprises an insulated outer protective layer, a tensile layer, an anti-corrosion layer, a steel tape armoring layer and an insulating layer from outside to inside, the interior of the insulating layer is formed by mutually winding a plurality of groups of conductor insulating shielding layers, the interior of the conductor insulating layer is formed by mutually winding a plurality of groups of conductor shielding layers, and a conductor water-blocking layer is arranged between the conductor insulating shielding layers and the conductor shielding layers; the conductor shielding layer is composed of a first conductor, a semiconductor water-blocking tape and a second conductor in sequence from outside to inside, and the cable solves the problems that when the cable is used in the seabed for a long time, the cable sheath is damaged due to long-term seawater corrosion, high-pressure seawater is diffused in the longitudinal direction through gaps existing in the cable, the long-distance cable is damaged, and the service life of the cable is prolonged. Therefore, the problem that the power cable is damaged and cannot transmit power is solved.

A corrugated copper submarine cable and a submarine cable production device. The submarine cable production device comprises a worktable, and further comprises: a fixing compartment arranged in the middle of the upper surface of the worktable, wherein a fixing pipe penetrates the interior of the fixing compartment, a winding assembly is arranged on the circumferential surface of one end of the fixing pipe, and the winding assembly comprises a rotating ring rotatably arranged on the circumferential surface of the fixing pipe; and a welding compartment arranged on one side of the fixing compartment, wherein two support frames are arranged in the welding compartment, the top ends of the two support frames are both fixedly connected to limiting rings, a positioning ring is rotatably arranged between the two limiting rings, the inner wall of the positioning ring is fixedly connected to a plurality of arc welding heads, and the plurality of arc welding heads are distributed in a circumferential array along the inner wall of the positioning ring. By providing a welding assembly, the present invention solves the problem of reduced production efficiency of corrugated copper submarine cables caused by a relatively slow welding speed and low efficiency during normal welding in which welding is performed by a large number of technicians to generate corrugated textures.

The invention discloses an anti-ultraviolet aging low-voltage power cable, and relates to the technical field of cables, the anti-ultraviolet aging low-voltage power cable comprises a fixed wire core, the fixed wire core is provided with a buffer processing assembly, the buffer processing assembly comprises an inner limit insulation sleeve, and the outer side of the fixed wire core is sleeved with the inner limit insulation sleeve. A plurality of clamping connection grooves are formed in the outer side end of the inner limiting insulation sleeve at equal intervals, a plurality of heat exchange integration frames are clamped to the outer side end of the inner limiting insulation sleeve at equal intervals, and protruding clamping frames are laid at the outer side end of the inner limiting insulation sleeve and one ends of the inner sides of the heat exchange integration frames. The situation of high-temperature aging in the cable caused by unbalanced heat production in the cable and poor heat conduction efficiency is avoided, different deformation in the cable caused by different thermal expansion and cold contraction at different positions is reduced through thermal uniformity, and the situation of dislocation damage in the cable is further reduced in cooperation with elastic stretching and elastic supporting. Therefore, the operation stability of the cable is effectively improved, and the service life of the cable is effectively prolonged.

The invention discloses an extruded and insulated flame-retardant power cable for on-line monitoring of rail transit, and relates to the technical field of power cables, serpentine springs are connected between two adjacent cavity frames and outside corresponding five conductors on the outer side, an outer plastic pipe is connected between two adjacent serpentine springs, the outer plastic pipe is filled with silicone fireproof adhesive, and the outer plastic pipe is connected with the outer side of the serpentine springs. According to the invention, through the cooperation of the cavity frame, the serpentine spring, the inner plastic pipe and the expanding and supporting strip, the outer side of the conductor is provided with a sufficient heat dissipation circulation gap, the heat dissipation speed of the cable is improved, and the inner parts of the outer plastic pipe and the inner plastic pipe are filled with silicone fireproof glue, so that the heat dissipation performance of the cable is improved. The silicone fireproof adhesive expands when meeting fire to form a compact fireproof layer which tightly wraps the outer side of the conductor, and the expanded fireproof layer can fill heat dissipation gaps among the conductors to prevent flame from spreading, so that the cable has good heat dissipation capability, and meanwhile, the flame retardant property of the cable is also ensured.

The invention belongs to the technical field of submarine cables, and provides a high-voltage three-core submarine cable. Comprising a cable core, a waterproof layer, an inner sheath, an armor layer and an outer sheath, the cable core comprises at least one conductive core, the conductive core comprises a conductor and an insulation system arranged outside the conductor, the insulation system comprises a conductor shielding layer, an insulation layer and an insulation shielding layer, and the conductivity of the conductor shielding layer is gradually reduced from inside to outside in the radial direction of the conductive core; the conductivity of the insulation shielding layer is gradually reduced from outside to inside in the radial direction of the conductive core. The contact interface of the conductor shielding layer and the insulating layer prevents charge from gathering at the interface, and the electric field distribution between the conductor shielding layer and the insulating shielding layer is greatly optimized; similarly, the electric conductivity of the insulation shielding layer is set to be gradually increased in the direction away from the insulation layer, the interface electric field between the insulation layer and the insulation shielding layer is optimized, electric charges on the interface of the insulation layer can be rapidly led to the insulation shielding layer, and the partial discharge phenomenon is prevented.

The invention provides a cable installation mechanism with a shield, and relates to the technical field of cable installation. Two locking mechanisms are further included, each locking mechanism comprises a fixing cylinder, the cable is in sliding connection with the fixing cylinder, multiple sets of locking grooves are formed in one end of the fixing cylinder, a rotating groove is formed in the other end of the fixing cylinder, multiple sets of balance springs are arranged in the rotating groove, multiple sets of sliding grooves are formed in the fixing cylinder, and a hexagonal groove is formed in the outer side wall of the fixing cylinder. A locking ring is rotationally connected into the rotating groove, multiple sets of unlocking grooves are formed in the locking ring, the multiple sets of balance springs correspond to the multiple sets of unlocking grooves in a one-to-one mode, the two ends of each balance spring are fixedly connected with the inner side walls of the unlocking grooves, and multiple sets of friction strips are arranged on the outer side wall of the locking ring. The problem that a cable body, a shielding pipe and a corrugated pipe need to be fixed separately in traditional cable installation is solved, an integrated synchronous locking mechanism is designed, and one-time rapid synchronous locking of the cable, the shielding pipe and the corrugated pipe is achieved.

The invention discloses a co-extrusion shielding medium-voltage power cable, and relates to the technical field of cables, the outer side of an inner reinforcing rope is provided with a supporting flame-retardant assembly, the outer side of the inner reinforcing rope is sleeved with a reinforcing spiral, the outer side of the reinforcing spiral is sleeved with a heat conduction pipe, a flame-retardant bag is installed between adjacent supporting rods, and one side of a heat conduction film is bonded with a flame-retardant silica adhesive tape. According to the invention, the reinforced connecting rods embedded in the reinforced through holes can extrude the supporting rods to deform, so that bending is resisted, and excessive bending deformation is prevented; heat generated in the use process of the cable can be dispersed to other positions of the cable, local overheating of the cable is prevented, influences on other inner conductors are reduced due to various reasons such as cooling, fire extinguishing and keeping away of the inner conductors, it is guaranteed that the cable can work normally for a longer time, and the other normal inner conductors are protected.

The invention relates to the technical field of power cables, and discloses an anti-termite fireproof power cable. The cable sequentially comprises a plurality of conductors, a filling layer, a conductor shielding layer and a mica tape fireproof layer from inside to outside, wherein the conductors are wrapped by insulating layers to form insulating wire cores; the filling layer wraps the insulating wire cores to form a circular cable core; the conductor shielding layer wraps the filling layer; the protective assembly comprises a protective layer spirally wound outside the fireproof layer and an expansion strip embedded in the protective layer, a buffer layer wrapping the protective assembly, a steel tape armoring layer wrapping the buffer layer and an outer sheath wrapping the steel tape armoring layer; the protective layer is formed by spirally connecting a plurality of fan-shaped retainers in the axial direction, the retainers are provided with grooves for containing the expansion strips, the outer walls of the retainers are provided with guide strips matched with the guide grooves to achieve stable connection, the expansion strips are heated to expand to fill gaps and insulate heat in a fire disaster, and the fireproof layer maintains insulation. The protection layer, the steel tape armoring and the outer sheath cooperate to achieve termite prevention and stable structure, and the operation safety and reliability of the cable are guaranteed.

The invention discloses a crosslinked polyethylene insulated flame-retardant power cable, which sequentially comprises a cable core, a shielding layer, an inner sheath layer, an armor layer and an outer sheath layer from inside to outside, and is characterized in that the inner sheath layer or the outer sheath layer is obtained by respectively extruding a sheath material on the outer side of the shielding layer or the armor layer; the sheath material is prepared from the following raw materials: low-density polyethylene, high-density polyethylene, phosphate modified yttrium-graphene nano porous particles, hydroxyapatite porous nanorods, a cross-linking agent, an assistant cross-linking agent, an antioxidant and the like. The obtained power cable has excellent insulativity and flame retardance and has a good application prospect in the field of high-voltage power transmission.

The invention discloses a polypropylene insulation high-voltage direct-current cable and a production method thereof, and relates to the technical field of cables, the polypropylene insulation high-voltage direct-current cable comprises an insulation layer, the insulation layer comprises an insulation part arranged between a conductor shielding layer and an insulation shielding layer, the insulation part is provided with a plurality of limiting holes communicated with the insulation shielding layer, the limiting holes are filled with phase change parts, and the phase change parts can transmit heat on the inner side of the insulation layer to the outer side of the insulation layer; and the cable can be converted between solid and liquid along with the temperature of the cable so as to fill an air gap between the insulating layer and the insulating shielding layer. The plurality of limiting holes are formed in the insulating part, the limiting holes are filled with the phase change parts capable of generating phase change at low temperature, and the temperature difference between the two sides of the insulating part is reduced through the heat conduction capability of the phase change parts, so that the problem of charge accumulation caused by the overlarge temperature difference between the two sides of the insulating part is avoided; and meanwhile, separation or air gaps between the insulating part and the insulating shielding layer are filled through phase change of the phase change part.

The invention discloses a composite conductive filler, a shielding material and a cable, the composite conductive filler comprises the following raw materials: conductive carbon black, carbon nanotubes and liquid metal, and the mass ratio of the conductive carbon black to the carbon nanotubes to the liquid metal is (80-90): (1-15): (1-12). The composite conductive filler provided by the invention has a ternary synergistic efficient conductive network structure, the contact resistance between the conductive fillers is remarkably reduced, the melt index of the composite conductive filler is greatly improved, meanwhile, micropores of the material can be filled at high temperature, the thermal cycle aging property of the material is remarkably reduced, and the service life of the material is prolonged. The integration of a high-stability conductive network, good processing fluidity and excellent interface thermal mechanical performance is realized. The key technical problem that conductivity, processability and long-term stability of a high-voltage cable semi-conductive shielding material are difficult to consider at the same time is solved, and particularly, the high-voltage cable semi-conductive shielding material can be applied to ultra-high voltage scenes of 110 kV and above.

The invention relates to a wear-resistant high-voltage power cable for a smart power grid, which is applied to the technical field of cables, and comprises a cable body, a plurality of wear detection early warning mechanisms are arranged on the cable body, and each wear detection early warning mechanism comprises a simulated wear sleeve sleeving the cable body; the simulated grinding sleeve and the wear-resistant outer protective layer are made of the same material, the thickness of the simulated grinding sleeve is smaller than that of the wear-resistant outer protective layer, and the inner sides of the two ends of the simulated grinding sleeve are fixedly connected with supporting connecting rings matched with the simulated grinding sleeve; through the arrangement of the abrasion detection early warning mechanism, the abrasion detection early warning mechanism not only can improve the abrasion resistance of the cable to a certain extent, but also has detection and early warning functions, and can indirectly detect the abrasion condition of the cable body by detecting the abrasion condition of the simulated abrasion sleeve, so that early warning can be carried out in time when the cable body is seriously abraded; related technicians are prompted to carry out corresponding inspection and maintenance on the cable in time, the potential safety hazard of the cable is reduced, and the safety and intelligence of the cable are improved.

The invention relates to a composite cable, and relates to the technical field of cables, the composite cable comprises a conductor layer, a composite insulating layer, a waterproof layer, a weather-proof sheath layer and an armor layer from inside to outside in sequence, the conductor layer comprises at least six tinned copper conductors, the tinned copper conductors are symmetrically arranged in a regular hexagon shape, dielectric elastomers are filled among the conductors, and the dielectric elastomers are arranged between the tinned copper conductors. The composite insulating layer comprises an inner shielding layer, a main insulating layer and an outer shielding layer from inside to outside, the waterproof layer is a fluororubber extruded layer, the weather-proof sheath layer comprises a bonding transition layer and a weather-proof functional layer, and the armor layer is of a stainless steel band spiral wrapping structure. The composite cable can meet the requirement for high performance in a harsh environment and can show excellent performance under the extreme conditions of low voltage, large day and night temperature difference, strong ultraviolet rays, sand and dust abrasion, acid rain corrosion and the like.

The invention discloses a 110kV high-voltage polypropylene power cable, and relates to the technical field of power cables, and the 110kV high-voltage polypropylene power cable comprises an outer sheath, a conductor is installed in the outer sheath, the conductor is sleeved with a cable core sleeve, a shielding sleeve is embedded in the outer wall of the cable core sleeve, an inner spacer bush is installed on the inner side of the outer sheath, and an outer spacer bush is installed on the outer side of the inner spacer bush. According to the invention, bidirectional limiting and locking protection of the inside and the outside of the cable can be realized, multiple supports are provided for the inside of the cable, the internal stress stability of the cable in the use process is effectively balanced, and the service life of the cable is prolonged. The interface compatibility among the structures in the cable is equivalently improved, the interface air gap generated by the thermal shrinkage of polypropylene is effectively compensated, the double restraint of water branches and electric branches is realized, the multiple optimization of the mechanical performance is structurally realized, the stability of the electric insulation performance is improved, and the effective service life of the cable is prolonged.

The invention relates to the technical field of cables, and provides a flexible corrosion-resistant robot cable, which sequentially comprises a cable core, a shielding layer, an inner sheath layer and an outer sheath layer from inside to outside, and is characterized in that the cable core sequentially comprises a conductor and an insulating layer from inside to outside; the outer sheath layer comprises the following raw material components in parts by weight: 60-70 parts of high-density polyethylene, 15-25 parts of an ethylene-tetrafluoroethylene copolymer, 0.5-1.5 parts of an antioxidant, 1-3 parts of a plasticizer, 8-12 parts of a flame retardant, 10-20 parts of polyethylene glycol diacrylate composite barium sulfate and 1-2 parts of a lubricant; the polyethylene glycol diacrylate composite barium sulfate is prepared from the following raw materials: polyethylene glycol diacrylate, barium chloride and sodium sulfate. According to the technical scheme, the problem of poor corrosion resistance of the robot cable in the prior art is solved.

The present invention discloses a medium-voltage longitudinal water-blocking cable with a large cross-section and a preparation method thereof. The cable includes a conductor, a conductor shield, an insulation layer, a non-metallic insulation shield, a metal shielding layer, an inner sheath, and an outer sheath from the inside to the outside. The conductor is a multi-layer tightly compressed stranded wire conductor, and a water-blocking tape is filled and wrapped between each layer of the stranded wire conductor; the materials of the inner sheath and the outer sheath are both high-density polyethylene. The structure of the present invention is more compact, simple, and lightweight, thus solving the longitudinal water-blocking requirement of the stranded conductor, while having good anti-overload and large short-circuit current withstand capabilities, and being conducive to the vulcanization and sealing connection of matching connectors or joints.

The invention discloses preparation of a super-tough wear-resistant aluminum alloy power cable, and belongs to the technical field of medium-voltage and high-voltage power cables. The cable comprises a molded wire aluminum alloy conductor, a cable semi-conductive conductor shielding layer, an insulating layer, a semi-conductive insulating shielding layer and a metal shielding layer are nested outside the molded wire aluminum alloy conductor to form a main body part of the cable, an environment-friendly flame-retardant filling layer is further filled in the middle of the cable, a halogen-free low-smoke flame-retardant wrapping tape is arranged outside the cable, and a halogen-free low-smoke flame-retardant isolation sleeve is further arranged outside the wrapping tape; the toughness of an aluminum alloy conductor is optimized through a gradient annealing process, a tough PE and POE composite sheath material and a halogen-free flame-retardant synergistic formula are adopted, a multi-layer composite structure is designed, and the problems that an existing aluminum alloy cable is insufficient in toughness, a sheath is prone to cracking and electromagnetic loss is high are solved; the comprehensive performance of the cable is obviously better than that of similar copper cables and common aluminum alloy cables, and the cable is suitable for new energy power generation and power transmission scenes under complex working conditions.

The invention discloses a low-smoke flame-retardant environment-friendly low-voltage power cable, and relates to the technical field of power cables, a plurality of thermal expansion flame-retardant strips are adhered to the inner side of a relay isolation sleeve at equal intervals, inner different buffer strips sleeve the inner sides of the plurality of thermal expansion flame-retardant strips, and corrugated metal outer guide sleeves are clamped to the inner sides of the plurality of inner different buffer strips; according to the cable, the problems that in the prior art, due to the fact that effective flame-retardant and heat-resistant components and oxygen and fire insulation components are not arranged in the cable, and a large amount of air is left in the cable, the cable is not prone to damage, and the cable is not prone to damage due to the fact that the cable is not internally provided with the effective flame-retardant and heat-resistant components and oxygen and fire insulation components are effectively solved. And through internal rapid self-extinguishing, the increase of the internal fire condition caused by flame spreading is reduced, the fire extinguishing speed of the cable is improved, and the situation that the overall body is greatly influenced when part of the cable is damaged due to insufficient fireproof and flame-retardant effects is reduced.

The invention discloses a corrosion-resistant medium-voltage power cable, which relates to the technical field of cables and comprises a cable core, a shielding layer, a fireproof layer, an armor layer and an outer sheath layer which are sequentially arranged from inside to outside. The cable core is composed of a plurality of insulated wire cores which are mutually twisted. Each insulated wire core is composed of copper wires which are mutually twisted and insulating layers which are sequentially wrapped outside the copper wires which are mutually twisted. A filling material is filled between the cable core and the shielding layer; according to the corrosion-resistant medium-voltage power cable disclosed by the invention, through a synergistic effect of a multi-layer composite structure design and a special modified material, excellent comprehensive performance is realized, and the corrosion-resistant medium-voltage power cable has excellent conductivity, electrical insulativity and mechanical strength and also shows outstanding corrosion resistance, weather resistance, flame retardance and waterproofness; the cable is especially suitable for ocean, underground, chemical plants and other application scenes with strong corrosivity and severe environmental conditions, and can maintain long-term stable operation in extreme environments.

The invention relates to the technical field of crosslinked polyethylene insulated power cables, in particular to a flame-retardant and insulated low-voltage power cable and a preparation method and application thereof. The flame-retardant and insulating low-voltage power cable comprises the inner core layer, the filler layer, the belting layer, the lining layer, the metal armor layer and the outer sheath layer from inside to outside, and the multiple layers can effectively protect the inner core and endow the cable with better performance; in addition, low-density polyethylene, a furan modified polyethylene compatilizer, a reactive flame retardant, bismaleimide, dicumyl peroxide and an auxiliary are adopted to obtain the cross-linked polyethylene material for the cable outer sheath, and the cross-linked polyethylene material has excellent insulation, flame retardance, strength, toughness and repairing performance.

The invention belongs to the technical field of wires and cables, discloses a crosslinked polyethylene insulated corrosion-resistant power cable, and aims to overcome the defects that internal metal corrosion is easily caused and active repair is lacked after an outer sheath of an existing cable is damaged. The cable comprises conductor wire cores, an insulating layer, inner and outer semi-conductive shielding layers, a metal shielding layer, a metal armor layer and a self-repairing outer sheath. The self-repairing outer sheath is provided with a first repairing sub-layer and a second repairing sub-layer in the radial direction, and the self-repairing outer sheath comprises a matrix polymer, a first repairing microcapsule, a second repairing microcapsule and a corrosion inhibitor nm container. And a catalyst primer coating is arranged between the metal armor layer and the self-repairing outer sheath. According to the invention, immediate damage response, structure self-healing and active corrosion inhibition can be realized, and the long-term service reliability of the cable is remarkably improved.

The utility model discloses a flame-retardant power cable capable of preventing electromagnetic interference. The flame-retardant power cable comprises a cable core, a cable core is arranged in the cable core, the cable core is composed of a central cable core and six outer ring cable cores surrounding the central cable core, a composite anti-electromagnetic interference layer is arranged outside the cable core, and the composite anti-electromagnetic interference layer is composed of a metal woven mesh shielding layer, a soft film shielding layer and an insulation filling layer. The metal woven mesh shielding layers are woven on the outer wall of the cable core in a staggered mode, the composite anti-electromagnetic interference layer is externally provided with a composite flame-retardant layer, the composite flame-retardant layer is composed of a flame-retardant substrate layer, an inorganic flame-retardant filler layer and a flame-retardant coating, the composite anti-electromagnetic interference layer is wrapped with the flame-retardant substrate layer in an extruded mode, and the inorganic flame-retardant filler layer is coated with the flame-retardant coating in an extruded mode. And an outer sheath is arranged outside the composite flame-retardant layer, and the outer sheath is composed of a wear-resistant layer and an anti-corrosion layer, so that the problem that signal transmission is hindered due to external electromagnetic interference of the power cable is solved.

The present invention discloses an isolated mineral insulated fire-resistant cable, which relates to the technical field of power cables and includes a cable body, wherein an anti-wear component is provided on the outer surface of the cable body. When the present invention is used, the first anti-wear plate and the second anti-wear plate are pushed to slide to the edge inside the hole, and the arc-shaped strip is pulled to move the blade to cut the capsule membrane on the outer surface of the epoxy resin capsule. The epoxy resin glue flows to the top of the adhesive block through the glue outlet hole, and the arc-shaped partition is completely pulled out. The spring pushes the adhesive block out of the ejection hole and contacts the inner wall of the hole. Wait for the epoxy resin glue to solidify, and achieve a firm bond between the adhesive block and the inner wall of the hole. Under the action of the anti-wear component, a protective cover is formed between the cable body and the edge of the inner wall of the hole, isolating the cable body from direct contact with the edge of the inner wall of the hole, and under the action of the two rubber gaskets, the flexible protection area of ​​the cable body is extended.

The invention relates to the technical field of cables, in particular to a cross-linked polyethylene insulated power cable for a humanoid robot, which comprises a plurality of groups of conductors, a heat insulation and heat conduction structure, a sheath, a heat dissipation structure and a power cable, and the insulating layer is arranged on the sheath and is in contact with the heat-insulating heat-conducting structure inside the sheath. The conductors are separated through the partition plates and the partition edge strips on the partition plates, and the situation that heat cannot be dissipated effectively due to the fact that the cable cores are attached together is avoided. By means of the heat conduction strips embedded in the separation edge strips and the heat conduction aluminum foil layers making contact with the heat conduction strips, heat generated by the conductors can be conducted outwards, and heat concentration in the cable is avoided. Through the heat dissipation structure which is arranged on the cable joint and is in contact with the heat-conducting aluminum foil layer, heat in the heat-conducting aluminum foil layer can be rapidly taken away through the cooling channel in the heat dissipation structure, so that the purpose of heat dissipation is achieved.

The invention discloses a crosslinked polyethylene low-smoke halogen-free flame-retardant power cable which comprises the following hierarchical structures: a conductor layer; an insulating layer; a shielding layer; the shielding layer takes polyethylene as a matrix and comprises the following components in parts by weight: 70-78 parts of matrix, 20-25 parts of carbon black and 2-5 parts of nano montmorillonite modified lignin, the thickness of the shielding layer is 0.8-1.2 mm, the shielding layer and the insulating layer are molded through a co-extrusion process, and the interface gap is less than or equal to 0.1 mm. The nano montmorillonite modified lignin is adopted as a core flame retardant, the addition amount is reduced by 10%-15% compared with that of a traditional halogen-free flame retardant, by taking a 120 mm civil cable as an example, 18 parts of modified lignin replace 25 parts of a traditional flame retardant with the same flame retardant effect, the raw material cost is reduced by 8%-12%, lignin is derived from agricultural and forestry wastes, dependence on a petroleum-based material is reduced, and the environment-friendly flame-retardant cable material is suitable for industrial production. The gradient cooling process shortens the cooling time by 20%-30% compared with the traditional single-section cold water cooling process, and meanwhile, the pre-crosslinking process reduces the subsequent forming internal stress and reduces the rejection rate.

The invention discloses an extreme-environment-resistant long-service-life power cable which comprises a main body, and the main body comprises a cable sheath, a shielding layer, an insulating layer and a conductor layer from outside to inside in sequence. The shielding layer comprises a shielding net and a metal foil, the shielding net is of a three-dimensional net structure formed by mixing and weaving copper magnesium alloy wires and shape memory alloy, the shielding net wraps the insulating layer in all directions, and a graphene coating is coated between the insulating layer and the shielding net; the metal foil is tightly attached to the surface of the shielding net, the outer surface of the metal foil is subjected to micro-arc oxidation treatment to generate a protective layer, and the inner surface of the protective layer is coated with a self-cleaning coating. According to the self-adaptive shielding net in the shielding layer, the copper magnesium alloy wires and the memory alloy wires are mixed and woven into a three-dimensional net structure, the memory alloy wires can drive the shielding net to deform in a self-adaptive mode, the state of tightly wrapping the insulating layer is maintained, the shielding effectiveness is stable in cooperation with the metal foil, and the shielding effect is stable in various complex electromagnetic environments of extreme environments. And the cable transmission can be effectively prevented from being interfered.

The present disclosure relates to a cable having reduced loss. Specifically, the present invention relates to a cable having reduced loss that is capable of minimizing the limitation of rated current due to heating of an outer armor and the resultant transmission loss while reducing manufacturing costs and minimizing an outer diameter and weight of the cable.