3538results about "Flexible cables" patented technology

The invention provides a low-voltage cable, and relates to the technical field of cables, the low-voltage cable comprises a conductor layer, a support layer, a shielding layer and a sheath layer, the conductor layer is composed of multiple strands of fractal stranded conductors, and each fractal stranded conductor comprises an inner-layer superfine silver-plated copper wire, a middle-layer copper-clad aluminum wire and an outer-layer nickel-plated copper alloy wire; the supporting layer wraps the conductor layer and comprises an inner supporting layer, a dynamic framework layer and an outer restraint layer, the inner supporting layer is an obliquely wound aramid fiber woven belt, the dynamic framework layer is formed by alternately arranging shape memory polymers and carbon fiber composite belts, and the outer restraint layer is a spirally wound silica gel-glass fiber composite rope. The shielding layer comprises a tinned copper wire woven mesh; the sheath layer is a thermoplastic polyurethane matrix, a microcapsule self-repairing agent is dispersed in the thermoplastic polyurethane matrix, a microcapsule comprises a siloxane prepolymer, and the thermoplastic polyurethane matrix further comprises graphene nanosheets. Through collaborative design of the fractal stranded conductor layer, the dynamic skeleton support layer, the shielding layer and the self-repairing sheath, comprehensive improvement of cable performance is realized.

The invention relates to the technical field of power cables, in particular to a bending-resistant medium-voltage power cable, which is characterized in that a plurality of cable cores are mounted in an outer sheath at equal angles in the circumferential direction, a plurality of supporting pads are uniformly mounted in the outer sheath at equal intervals, and a protective tube is mounted in the middle of the side end surface of each supporting pad; according to the invention, equal unloading of external bending stress and external impact pressure can be realized, and internal and external dual pressure relief can be realized, so that the stress borne by each part of the cable is more balanced, and the reliability of the cable is improved. The minimum bending radius of the cable can be dynamically regulated and controlled, comprehensive regulation and control of bending toughness and bending flexibility of the cable are achieved, the requirements of different use scenes are effectively considered, the application flexibility of the cable is improved, meanwhile, the effective utilization rate of load pressure in the cable can be improved, and the effective service life of the cable is prolonged.

The invention discloses a corrosion-resistant and flame-retardant cross-linked polyolefin cable, and belongs to the technical field of polyolefin cable manufacturing. The corrosion-resistant and flame-retardant cross-linked polyolefin cable comprises a conductor wrapped with an isolating layer, an oxygen isolating layer and an insulating layer are sequentially extruded outside the isolating layer, then a belting layer is wrapped outside the isolating layer, and then a polyolefin composite shielding material inner shielding layer containing ferrite and a ceramic flame-retardant polyolefin composite material flame-retardant layer are sequentially extruded outside the isolating layer. An aluminum foil Mylar tape is lapped to form an outer shielding layer, finally, a halogen-free low-smoke flame-retardant corrosion-resistant polyolefin mixture outer protection layer is coated, and a protective coating is coated. The corrosion-resistant and flame-retardant cross-linked polyolefin cable is simple in structure and easy to manufacture, has excellent mechanical properties, high pressure resistance, tensile resistance, bending resistance, flame retardance, waterproofness, corrosion resistance, aging resistance, interference resistance, radiation resistance and high and low temperature impact resistance, and prolongs the high-temperature service life of the cable.

The invention discloses a low-smoke halogen-free cross-linked polyethylene insulated power cable, and relates to the technical field of power cables, the low-smoke halogen-free cross-linked polyethylene insulated power cable comprises a central conductor, the outer side of the central conductor is tightly coated with a rubber insulation sleeve, and the outer sides of a plurality of rubber insulation sleeves are jointly coated with a limiting silicon rubber sleeve; the outer side of the limiting silicon rubber sleeve is evenly coated with axial supporting inner rings at equal intervals, the outer rings of the axial supporting inner rings are tightly coated with axial protection outer rings, the outer sides of the axial protection outer rings and the filling soft rubber sleeve are jointly coated with an isolation protection rubber sleeve, and the outer ring of the isolation protection rubber sleeve is tightly coated with an installation outer rubber sleeve. According to the cable, the situation that rain and snow are attached to the outer side of the cable, and consequently the overall weight of the cable is increased is effectively prevented, the transverse traction force of the connecting position of the ends of the cable during working is reduced, the fatigue aging rate of the connecting position of the cable is reduced, and the actual service life of the cable is prolonged.

The invention belongs to the technical field of energy storage cables, and particularly relates to a new energy energy storage cable with an automatic temperature adjusting function. Comprising an insulating layer, and a plurality of conductors are arranged in the insulating layer; the outer part of the insulating layer is wrapped with the protective sleeve; the new energy storage cable with the automatic temperature adjusting function further comprises a temperature adjusting unit. According to the energy storage cable, the temperature adjusting unit is arranged in the insulating layer in the energy storage cable, and the temperature adjusting unit can adjust the temperature in the insulating layer in a cooling liquid heat exchange mode, so that the temperature in the energy storage cable is prevented from being too high or too low, heat increase is reduced, energy loss is reduced, aging of the insulating material is slowed down, and the service life of the energy storage cable is prolonged. Fire disasters are reduced; and meanwhile, the cable flexibility reduction caused by low temperature is prevented, and the durability of the energy storage cable is improved.

The invention discloses a high-temperature-resistant fireproof cable, and relates to the technical field of cables, the inner side of a silicone rubber insulation sleeve is equidistantly provided with a plurality of fixed wire cores, the outer side ends of the fixed wire cores are sleeved with a cross-linked insulation sleeve, the outer side end of the cross-linked insulation sleeve is equidistantly provided with a plurality of expansion surface-increasing grooves, and the outer side end of the cross-linked insulation sleeve is equidistantly wound with soft pressure heat exchange strips; and a plurality of hollow double-pressure bags are adhered to the outer side ends of the plurality of soft-pressure heat exchange strips at equal intervals, and a plurality of positioning exchange strips are laid at the outer side ends of the plurality of hollow double-pressure bags at equal intervals. According to the utility model, the influence of the separation and the cavity on the operation of the cable caused by the influence of the production and the bending of the cable is avoided, and meanwhile, the compaction treatment and the heat homogenization treatment are performed on each part of the cable, thereby reducing the occurrence of single-point excessive heating, and effectively improving the service life and the operation stability of the cable.

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 a cable with a liquid cooling heat dissipation function. The cable comprises a closed cable section, an input cable section and an output cable section, the closed cable section is a completely-sealed cable section and is mainly used for liquid cooling heat dissipation of the cable; the input cable section is mainly used for transition connection between a power supply end and the closed cable section; and the output cable section is mainly used for transition connection between the closed cable section and a power utilization end. Through the synergistic effect of the insulating liquid cooling oil, the annular cooling fins, the complete through holes, the one-way through holes and the like, heat generated by operation of the cable can be rapidly absorbed and dissipated, local overheating is avoided, stable operation of the cable is ensured, and the heat dissipation efficiency is improved; compared with a mode of additionally arranging a spiral metal tube on the whole cable, the material and transportation cost is reduced, and the flexibility is not sacrificed; the high-quality material selection and the reasonable structural design ensure the electrical insulation performance, reduce the faults caused by the heat dissipation problem, and prolong the service life of the cable.

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 power cable convenient for cable butt joint connection, and relates to the technical field of power cables, the power cable comprises two conductors, the outer sides of the conductors are sleeved with neck bushes, and the outer sides of the neck bushes are provided with supporting and traction butt joint mechanisms; the supporting and traction butt joint mechanism comprises a corrugated pipe, a lantern ring, a semi-arc sleeve, a connecting block, an elastic rope, a clamping block, an embedding groove, a clamping groove, an arc-shaped cover, flame-retardant cotton, a heat conduction rubber strip, an iron gauze and a limiting groove, and the corrugated pipe is connected to the outer side of the neck bush in a sleeving mode. Through cooperation of the clamping grooves and the clamping blocks, the semi-arc sleeves are conveniently limited on the outer sides of the lantern rings through the connecting blocks, the splicing convenience is improved, and when two cables need to be in butt joint, the semi-arc sleeves are pulled to move, so that the semi-arc sleeves on the two cables are mutually clamped on the outer sides of the lantern rings of the two cables, and the elastic ropes on the two conductors are forced to be mutually staggered and pulled.

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.

In order to solve the problems of heat conduction, excessive ceramization, influence on the performance of a part which is not subjected to a fire disaster and increase of maintenance cost, an armored protection layer and a separation assembly are arranged at an interval, and the separation assembly is of a continuous broken-line-shaped tubular structure, so that the bending difficulty of the cable can be reduced, and the cable is suitable for being laid in a narrow and small space; the partition assembly comprises a folding cavity, an outer layer shell and an inner layer shell, a V-shaped groove is formed in the downward bending position of the outer layer shell, ceramization powder accounting for two thirds of the volume of the outer layer shell is contained in the V-shaped groove, the powder can enter the folding cavity after a plugging piece in a side circulation hole is heated and melted, and according to the design, ceramization reaction spreading is controlled through a sectional structure, thermal stress concentration is relieved, and the service life of the ceramic is prolonged. The heat insulation effect is enhanced, continuous work of the cable in a fire disaster is guaranteed, the problem of flexibility reduction caused by unnecessary ceramization is avoided, and construction flexibility and fire-resistant reliability are both considered.

The invention relates to the technical field of cable connection, in particular to a cable connecting mechanism and a cable structure.The cable connecting mechanism comprises a connecting insulating pipe, cable bodies are inserted into the two ends of the connecting insulating pipe respectively, a plurality of cable cores are arranged in the cable bodies, a plurality of metal sleeves are fixedly arranged in the connecting insulating pipe, and the cable cores are matched with the metal sleeves in an inserted mode; a plurality of pressing assemblies are arranged on the connecting insulating tube, semicircular blocks are arranged on the pressing assemblies, two insulating blocks are fixedly arranged on the semicircular blocks in a symmetrical structure, the insulating blocks sequentially penetrate through the metal sleeve and the connecting insulating tube to extend to the outside, two protection assemblies are fixedly arranged on the outer wall of the connecting insulating tube in a symmetrical structure, and protection blocks are arranged on the protection assemblies. The outer peripheral walls of the two ends of the connecting insulating tube are sleeved with clamping assemblies. The cable connection process is simplified, the connection efficiency is improved, the connection stability and reliability are improved, the sealing performance and safety of cable connection are ensured, the stability and anti-falling performance of cable connection are improved, and the cable body is prevented from falling off or loosening accidentally.

The invention provides a variable-stiffness anti-fatigue flexible cable, and relates to the technical field of cables, and the flexible cable comprises a heat conduction channel which is arranged along the axial direction of the cable in a penetrating manner, a conductor which is spirally arranged around the heat conduction channel, a filling layer which wraps the heat conduction channel and the conductor, a shielding layer of which the inner side is provided with a storage cavity, and an adjusting layer which comprises a plurality of rigid adjusting units. Wherein heat conduction liquid is arranged in the heat conduction channel, a heat conduction pipe is embedded in the filling layer, the heat conduction pipe is provided with a valve port, the heat conduction pipe is communicated with the storage cavity, and each rigid adjusting unit is a flexible bag filled with a phase change material. Liquid heat triggers the phase-change material to expand through the shielding layer, so that the rigidity adjusting unit extends to enhance local rigidity, the effect of inhibiting excessive bending is achieved, the short-time hardness of a bending part is higher than that of a peripheral area due to expansion retention of the phase-change material, and the purpose of dynamically transferring a bending stress point is achieved.

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 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 discloses a single-core power cable and a single-core composite cable. The single-core power cable comprises a wire core, a conductor shielding layer, an insulating layer, an insulating shielding layer, a sheath layer, an armor layer and an outer coating layer from inside to outside in the radial direction, the armor layer is made of a carbon fiber composite material, and the carbon fiber composite material is prepared by taking a polymer as a matrix and carbon fibers as a reinforcing material. According to the invention, by using the carbon fiber composite material in the armor layer, not only can the problem of large metal armor loss be solved, but also the hysteresis phenomenon and the heating and temperature rise of the armor layer can be effectively avoided.

The invention discloses an environment-friendly cable and a preparation process thereof, and relates to the technical field of cable manufacturing, the environment-friendly cable comprises a barrier strip, the inner side surface of the barrier strip is fixedly connected with a polyethylene pipe, the inner side surface of the polyethylene pipe is fixedly connected with a spiral sheet, and the inner side surface of the spiral sheet is fixedly connected with a wire core. The fixed connection mechanism is used for leading-in and leading-out of cooling gas between the wire core and the polyethylene pipe and insulation protection of the surface of the wire core. According to the environment-friendly cable and the preparation process thereof, the fixed connection mechanism conveys cooling gas into each polyethylene pipe at the same time, the cooling gas flows along the spiral sheet so as to rapidly take away heat on the surface of the cable core, the gas directionality is higher through the gas flow channel of the spiral structure, and therefore the efficiency of taking away the heat carried by gas flowing is higher, and the service life of the cable is prolonged. The flame-retardant mechanism blocks the outer side surface of the polyethylene pipe, so that the cable is not liable to be on fire and is easy to be subjected to flame retardance during fire.

The utility model discloses a bending-resistant radio frequency coaxial cable, which comprises an inner conductor, an insulating layer, a shielding layer and a sheath layer which are sequentially arranged from inside to outside, the inner conductor is formed by concentrically twisting a plurality of strands of silver-plated copper wire monofilaments; the insulating layer comprises an inner insulating layer and a polytetrafluoroethylene film outer insulating layer; the inner insulating layer is wrapped outside the inner conductor and is formed by sintering a polytetrafluoroethylene tape; the polytetrafluoroethylene film outer insulating layer is wrapped outside the inner insulating layer; the shielding layer comprises an inner shielding layer, a middle layer and an outer shielding layer, and the inner shielding layer is a silver-plated copper strip wrapping layer and wraps the insulating layer; the middle layer is a polyimide aluminum foil composite belt wrapping the inner shielding layer; the outer shielding layer is a silver-plated aramid yarn woven layer and is woven outside the middle layer; the sheath layer is a polytetrafluoroethylene sheath layer. The cable provided by the utility model has the characteristics of high-frequency bending resistance and good environment resistance, and also has excellent electrical transmission performance.

The invention discloses a composite overhead insulated cable, and relates to the field of insulated cable devices, the composite overhead insulated cable comprises an insulated heat conduction layer, a plurality of groups of power transmission conductors are arranged in the insulated heat conduction layer, each power transmission conductor is formed by twisting a plurality of copper alloy wire cores, and a protection unit is arranged outside the insulated heat conduction layer. According to the composite overhead insulated cable, the positioning assembly is arranged in the cable, and the deformation limiting assembly and the extrusion buffer assembly are respectively arranged at the positioning assembly, so that multiple groups of power transmission conductors are positioned through the positioning assembly; effective extension of the cable under the conditions of torsion and extrusion force can be ensured through the deformation limiting assembly and the extrusion buffering assembly, so that the limiting assembly and the anti-extrusion assembly do not influence each other and buffer the generated torsion force and extrusion force, the overall pressure resistance of the cable can be improved, the rebound effect of the cable is ensured, and the service life of the cable is prolonged. The overall flexibility of the cable is improved, and the service life of the cable is prolonged.

The invention discloses a halogen-free flame-retardant environment-friendly heat-resistant cable and a preparation method thereof, belongs to the technical field of cable material processing, and is used for solving the technical problem that the mechanical strength and heat resistance of a halogen-free flame-retardant environment-friendly cable in the prior art need to be further improved. The cable comprises a plurality of cable conductors, a wrapping layer and a sheath layer which are sequentially arranged from inside to outside, and the sheath layer comprises the following components in parts by weight: 70-80 parts of low-density polyethylene, 20-30 parts of modified polysiloxane, 10-16 parts of modified polyvinyl alcohol, 15-18 parts of modified kaolin, 2-3 parts of an initiator and 3-4 parts of an auxiliary additive. Low-density polyethylene is reinforced and modified through modified kaolin, modified polyvinyl alcohol and modified polysiloxane, so that not only are the mechanical strength and flame retardance of the environment-friendly heat-resistant cable effectively improved, but also the high-temperature resistance of the cable is improved, and the service life of the cable in a high-temperature environment is prolonged.

The invention relates to the technical field of cables, and provides a tensile new energy charging pile cable which comprises a conductor, an insulating layer, a shielding layer and a sheath layer which are sequentially arranged from inside to outside. The sheath layer comprises the following components in parts by weight: 60-70 parts of chlorinated polyethylene, 15-20 parts of polyisoprene, 5-10 parts of an ethylene-methyl methacrylate copolymer, 8-18 parts of an acrylonitrile-butadiene-styrene copolymer, 20-30 parts of modified hydroxyapatite, 1-5 parts of a lubricant, 3-6 parts of a plasticizer, 30-40 parts of a flame retardant and 1-3 parts of an antioxidant; the raw materials of the modified hydroxyapatite comprise hydroxyapatite and a modifier; the modifier comprises maleic acid-acrylic acid copolymer sodium salt; the weight ratio of the hydroxyapatite to the modifier is 45: (1-7). According to the technical scheme, the problem that the cable sheath layer of the new energy charging pile is poor in tensile property and corrosion resistance in the prior art is solved.

The invention relates to the technical field of dynamic submarine cables, and provides a submarine cable for ultra-shallow water and a preparation method of an armored composite layer, and the submarine cable for ultra-shallow water comprises a cable core structure, a filling strip, an optical unit, an inner sheath and the armored composite layer. The cable core structure is filled with filling strips during cabling and twisting, part of the filling strips are internally provided with optical units, the cable core structure, the filling strips and the optical units are cabled and then wrapped with an inner sheath, and the outer side of the inner sheath is provided with an armored composite layer; wherein the armoring composite layer comprises a braided armoring layer and a polymer matrix, the braided armoring layer is formed by braiding a plurality of armoring wires, and the polymer matrix wraps the braided armoring layer, fills pores of the braided armoring layer and is integrated with the braided armoring layer. According to the submarine cable for the ultra-shallow water, the minimum bending radius of the submarine cable is reduced, a compact solid body can be formed, the longitudinal water blocking capacity and the lateral pressure resisting capacity are improved, and then the ultra-shallow water large-deviation use requirement and the good anti-fatigue capacity of the submarine cable are met.

The invention relates to the technical field of metal wires, in particular to a low-voltage aluminum wire and a preparation method thereof, the sectional area of the wire is 35 square millimeters, the wire comprises an aluminum alloy conductor and an insulating layer, the aluminum alloy conductor comprises the following chemical components: 0.7-0.9% of magnesium, 0.4-0.6% of silicon, 0.15-0.25% of copper, 0.08-0.12% of zirconium, 0.05-0.09% of scandium, 0.03-0.07% of silver, 0.01-0.03% of erbium, 0.02-0.04% of vanadium and the balance of aluminum, and the microstructure of the aluminum alloy conductor is in gradient distribution. The center is ultra-fine grains, a transition region contains a nano precipitated phase, the surface layer is of a high-density dislocation and nano precipitated phase synergistic reinforcement structure, the insulating layer is of a double-layer composite structure, the inner layer is a crosslinked polyethylene modified layer, the outer layer is an ethylene-tetrafluoroethylene copolymer modified layer, the electric conductivity is improved to 58% IACS or above, and the tensile strength is improved to 280 MPa or above.

The invention provides a comprehensive shielding signal cable and a manufacturing method thereof.The comprehensive shielding signal cable comprises a cable core and a protective layer wrapping the cable core, and the protective layer sequentially comprises a composite shielding layer and an outer sheath layer from inside to outside; the composite shielding layer comprises an iron-based amorphous nanocrystalline alloy layer, a 3D woven mesh layer and a conductive polymer coating which are sequentially arranged on the outer side of the cable core from inside to outside; through the gradient composite structure of the iron-based amorphous nanocrystalline alloy layer (low-frequency magnetic shielding), the 3D woven mesh layer (medium-frequency electromagnetic shielding) and the conductive polymer coating (high-frequency electric field shielding), the full-band shielding effectiveness is realized for the first time, meanwhile, the return loss is greatly reduced, the electromagnetic transmission performance and reliability of the cable are improved, and the service life of the cable is prolonged. And the structural stability of the cable is improved.

The invention relates to the technical field of cables, and particularly discloses a high-performance halogen-free flame-retardant flexible power cable. The high-performance halogen-free flame-retardant flexible power cable comprises a core layer, an insulating layer, a flame-retardant layer, a shielding layer and a protective layer which are arranged in sequence, the flame-retardant layer is prepared from the following raw material components in parts by weight: 30 to 40 parts of ethylene-vinyl acetate copolymer, 10 to 20 parts of polyolefin elastomer, 8 to 10 parts of microencapsulated ammonium polyphosphate, 2.5 to 4.5 parts of pentaerythritol, 20 to 30 parts of inorganic flame retardant, 5 to 8 parts of expansible graphite, 2 to 3 parts of diatomite, 0.5 to 1.5 parts of nano kaolin, 2 to 3 parts of zinc borate, 0.1 to 0.5 part of antioxidant and 0.5 to 1.0 part of lubricant. The cable provided by the invention not only has good flame retardant property, but also has certain flexibility.

The invention discloses a sheath material for a saline-alkaline-resistant dragging cable, a preparation method of the sheath material, the cable and the sheath material. The sheath material is prepared from the following raw materials in parts by weight: 40 to 45 parts of chlorinated polyethylene, 1.5 to 2.0 parts of dicumyl peroxide vulcanizing agent, 2 to 2.5 parts of triisocyanate vulcanizing agent, 0.1 to 0.3 part of ethylene thiourea accelerant, 0.05 to 0.15 part of anti-aging agent RD, 4 to 5 parts of metal oxide, 1 to 1.5 parts of paraffin, 8 to 10 parts of calcium carbonate, 15 to 21 parts of reinforcing agent, 1 to 1.5 parts of lead stearate, 0.5 to 1 part of lead sulfate tribasic, 1 to 1.5 parts of ultraviolet light absorber, 3 to 5 parts of epoxidized soybean oil and 8 to 8 parts of chlorinated paraffin. 9 parts of antimony trioxide and 3-4 parts of antimony trioxide. The cable has the advantages of ultraviolet resistance, no salt deposition, water resistance, tensile resistance, cold resistance and the like, can be used for a long time in a special operating environment, has the service life of at least more than 3 years, and avoids frequent replacement of the cable by a user.

The invention discloses an anti-bending flexible cable, which belongs to the technical field of cables, and comprises a protective layer positioned on the outermost layer, an insulating layer positioned on the inner layer of the protective layer, and a plurality of or a plurality of strands of conductors positioned on the inner layer of the insulating layer and distributed along the circumferential direction of the insulating layer in an array manner, the spacing pieces penetrate through the conductors and are distributed in an array mode in the axial direction of the conductors, and all the conductors are distributed at intervals in an array mode in the circumferential direction of the spacing pieces; the cable further comprises arc-shaped anti-bending strips which are located between every two adjacent spacing pieces and penetrate through each conductor or each strand of conductors arrayed in the circumferential direction, and all the arc-shaped anti-bending strips are synchronously bent towards the axis of the cable or synchronously bent back to the axis of the cable. According to the cable, through the collaborative design of the arc-shaped anti-bending strips and the spacing pieces, the anti-bending performance and the supporting strength are guaranteed, meanwhile, light weight, high flexibility and low cost are achieved, the problems that a traditional metal armored cable is large in weight, poor in flexibility and high in cost are effectively solved, and the cable adapts to long-term stable operation in the outdoor complex environment.