2312results 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 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 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 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 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 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 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.

The invention provides an inner and outer layer compression-resistant flexible cable. The inner and outer layer compression-resistant flexible cable comprises an inner protective layer, an electric unit, an outer protective layer, a buffer assembly and a supporting assembly, the electric unit is positioned in the inner protective layer; the outer protection layer is arranged on the periphery of the inner protection layer at intervals; the buffer assembly is located between the outer protection layer and the inner protection layer and comprises an outer sliding part and a transverse moving part, one end of the outer sliding part is elastically connected to the first area part of the inner protection layer, and the other end of the outer sliding part is slidably connected to the outer protection layer; the supporting assembly is located in the inner protection layer and comprises a supporting piece, an inner sliding piece and a swinging piece, the electric unit is clamped between the supporting piece and the swinging piece, one end of the inner sliding piece is slidably connected to the supporting piece, the other end of the inner sliding piece abuts against the second area part of the inner protection layer, and the swinging piece is rotatably connected to the inner sliding piece; when the outer sliding part slides towards the side close to the inner protection layer, the outer sliding part can abut against the transverse moving part to slide around the inner protection layer and provide inner pressure for the inner sliding part, and the inner sliding part slides towards the side away from the inner protection layer based on the inner pressure.

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 invention discloses an intelligent sensing flame-retardant green environment-friendly power cable, and relates to the technical field of cables, the intelligent sensing flame-retardant green environment-friendly power cable comprises an inner sheath, the inner sheath is filled with three conductors, the outer side of the inner sheath is provided with an assembly flame-retardant and heat dissipation mechanism, and the assembly flame-retardant and heat dissipation mechanism comprises a flame-retardant plate. According to the invention, the structure is scientific and reasonable, the use is safe and convenient, a splicing flame-retardant and heat dissipation mechanism is arranged, the flame-retardant plates can be conveniently combined and connected to the outer side of the inner sheath in a sleeving manner through the splicing plates, the flame-retardant plates can be conveniently combined and connected to the outer side of the inner sheath in a sleeving manner through the splicing plates, and the flame-retardant plates can be conveniently combined and connected to the outer side of the inner sheath through the splicing plates. Inserting barrels are conveniently embedded into positioning holes through attaching plates, convex rods are embedded into the inserting barrels, clamping rings are embedded into clamping grooves, the positions of the inserting barrels and the convex rods are fixed, the attaching plates are forced to be tightly attached to the outer sides of the flame-retardant plates, then the attaching plates are matched with the splicing plates, the flame-retardant plates are positioned, and the splicing tightness of the flame-retardant plates is improved.

The invention relates to the technical field of cable monitoring and correction, in particular to a cable with an internal monitoring and correction mechanism, which comprises an internal core wire, a core wire shield arranged on the outer side of the internal core wire, a core wire insulator sleeved on the outer side of the core wire shield, and an insulation shield sleeved on the outer side of the core wire insulator. According to the cable with the internal monitoring and correction mechanism, the internal monitoring and correction modules arranged in the annular matrix are arranged in the filling layer, so that the attitude of the cable can be monitored from multiple directions, the monitoring range of the cable is greatly expanded, and the monitoring data is more comprehensive; the whole internal monitoring correction module not only can monitor the bending degree and the tensile deformation length of the cable through the flexible pull ropes at the two ends, but also can measure the internal temperature and humidity conditions of the cable, so that the comprehensiveness of monitoring data is greatly improved.

The invention discloses a large-current-carrying-capacity flexible power cable, which belongs to the technical field of cable preparation, is used for solving the technical problem that the flame retardant property and the mechanical property of the power cable need to be further improved in the prior art, and specifically comprises a cable core, a wrapping layer, an insulating layer and a sheath layer which are sequentially arranged from inside to outside. The preparation method comprises the following steps: preparing alkoxy silane containing a benzocyclobutene group, preparing flame-retardant particles by using a sol-gel method, preparing modified polyurethane by using modified polysiloxane and 2, 5-furandimethanol as soft segments, naphthalene diisocyanate as a hard segment and trimethylolpropane as a chain extender, and preparing the flame-retardant flame-retardant polyurethane. The linear low-density polyethylene, the MAH-g-PE, the modified polyurethane, the flame-retardant particles and the auxiliary additive are melted and extruded outside the wire core to form the insulating layer, so that the power cable is obtained, the flame-retardant property of the power cable is effectively improved, and the mechanical property and the current-carrying stability of the power cable are also improved.

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 present invention provides a flat ribbon flexible cable, the flat ribbon flexible cable having a bending surface, and a plurality of shunt channels are sequentially formed near the bending surface of the flat ribbon flexible cable; when the flat ribbon flexible cable is bent, a corresponding pre-bending section can be formed, and a pressure change occurs in the shunt channels at the pre-bending section, so that the flat ribbon flexible cable is bent along a preset direction or has a tendency to be bent along the preset direction, thereby reducing the driving force required for bending in the preset direction, avoiding affecting the motion accuracy and efficiency of the device, avoiding the phenomenon of accelerating the fatigue of the cable structure due to repeated stress concentration, causing deterioration of signal transmission performance and even the risk of fracture, and meeting the requirements of high-efficiency, reliable and long-life operation of the device.

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 a 5G high-frequency signal anti-interference flexible cable which comprises a first cable and a second cable, bare cells of the first cable and the second cable are stranded and then connected through tin soldering, a sliding sleeve sleeves the bare cells together, the bare cells in the sliding sleeve sequentially wrap an insulating sealing sleeve, a metal shielding net, insulating rubber, a buffer pad and a sheath, the sheath is fixed to the inner wall of the sliding sleeve, and the inner diameter of the sheath is larger than the outer diameter of the cable. The two ends of the sliding sleeve clamp the cable through elastic clamping pieces. The metal shielding net is woven by high-conductivity copper and is welded with the original shielding layer of the cable to form a continuous shielding channel, so that electromagnetic interference is effectively blocked; the inner wall of the insulation sealing sleeve is provided with a spiral sealing groove consistent with the cable twisting direction, and the spiral sealing groove is matched with insulation rubber, a buffer pad and a sheath with a sealing ring, so that the sealing performance is enhanced, and high-frequency interference is attenuated; the design of the sliding sleeve and the elastic clamping piece enables the shielding structure to be complete when the cable is bent. The cable ensures stable transmission of 5G high-frequency signals through multi-layer shielding and flexible structure design, and is suitable for high-frequency communication scenes requiring interference resistance.

The invention discloses a high-flexibility drag chain cable and a preparation method thereof, belongs to the technical field of cable processing, and is used for solving the technical problem that the flame retardance and wear resistance of a drag chain cable in the prior art need to be further improved, and the high-flexibility drag chain cable specifically comprises a battery cell, a wrapping layer and a sheath layer which are sequentially arranged from inside to outside, and the sheath layer wraps the wrapping layer. The preparation method comprises the following steps: preparing a modified flame retardant from modified polysiloxane and a phosphorus-based substance through amine-aldehyde condensation, introducing the modified flame retardant into a polyurethane chain segment through a block reaction, carrying out a chain extension reaction to obtain modified polyurethane with a three-dimensional network structure, carrying out melt extrusion on the modified polyurethane, a filler and an auxiliary additive, and coating a wrapping layer with the obtained product. According to the drag chain cable, the flame retardant property and wear resistance of the drag chain cable are improved, and the distortion resistance of the drag chain cable is also improved.

The utility model discloses an environment-friendly heat insulation type medium-voltage cross-linked flexible fireproof cable, which comprises a cable core, the cable core comprises three wire cores and a filling layer, a mica tape wrapping layer is arranged outside the cable core, the mica tape wrapping layer is spirally wound and connected outside the cable core, and the filling layer is arranged outside the mica tape wrapping layer. A composite fireproof layer is arranged outside the mica tape wrapping layer, the composite fireproof layer is attached to the mica tape wrapping layer, a composite heat insulation layer is arranged outside the composite fireproof layer, the composite heat insulation layer is attached to the composite fireproof layer, a flexible armor layer is arranged outside the composite heat insulation layer, and a fireproof layer is arranged outside the flexible armor layer. The flexible armor layer is attached to the composite heat insulation layer, the outer sheath is arranged outside the flexible armor layer, the heat insulation layer in the fireproof cable is of a double-layer structure, external heat is effectively blocked, heat is prevented from being conducted into the cable in a high-temperature and high-heat state, and the heat insulation performance of the cable is improved; and the use effect of the fireproof cable is improved.

The invention relates to the field of drag chain cables, in particular to a high-flexibility shielding type drag chain cable and a preparation method thereof. The drag chain cable sequentially comprises a conductor layer, a shielding layer and a sheath layer from inside to outside. The conductor layer is formed by compositely twisting silver-plated copper wires and carbon fibers; the shielding layer comprises an inner shielding layer and an outer shielding layer, the inner shielding layer is wrapped by an aluminum-plastic composite belt, and the outer shielding layer is a tinned copper wire woven mesh. The sheath layer comprises the following components: a modified polyurethane elastomer, an ethylene-vinyl acetate copolymer, nitrile rubber, a composite flame retardant, a plasticizer, an antioxidant, a light stabilizer and a lubricant. Through the structural design of the conductor layer, the shielding layer and the sheath layer and the optimization of the material formula of the sheath layer, the problems that an existing drag chain cable is insufficient in strength and flexibility, limited in shielding effectiveness, poor in wear resistance and weather resistance and difficult to consider both flame retardance and mechanical property are solved.

The invention relates to the technical field of cables, in particular to a composite low-voltage power cable. In the long-term compression and impact process of the existing cable, the cable core structure is easy to deform and damage, the resistance of a conductor is abnormally increased, and the risk of power supply interruption is obviously increased. Comprising a protective sleeve, an armor layer is installed in the protective sleeve, and a plurality of supporting blocks and a plurality of cable cores are arranged in the armor layer; the protective sleeve is provided with a plurality of first cavities distributed at equal intervals in the circumferential direction, and the first cavities are used for providing a movement range for deformation of the protective sleeve and facilitating dislocation rotation of the inner side faces and the outer side faces of the first cavities in the deformation process. According to the invention, through the movement space provided by the first cavity, the extrusion of a heavy object is buffered, and the extrusion of the heavy object is guided to be staggered, so that the impact force borne by a cable core is reduced; and through a multi-layer composite structure formed by the protective sleeve and the armor layer, the use strength of the cable is improved.

The invention relates to the technical field of cable preparation, in particular to a preparation process of a high-flexibility composite drag chain cable, and the process comprises the steps: S1, enabling a plurality of strands of metal wires to be twisted and wound into a cable conductor; s2, adding an insulating layer raw material according to a weight ratio to prepare an insulating layer sizing material; and S3, the surface of a cable conductor is coated with the insulating layer sizing material through a core wire insulation extruder, traction and take-up treatment is conducted on the cable obtained after coating treatment, a cable finished product is obtained, and the traction speed in the traction and take-up process is controlled based on changes of the speed and the temperature in the traction and take-up process. According to the method, the hysteresis influence of the screw speed of the extruder and the head temperature on the extrusion speed is considered, so that the problem that the traction speed is not timely responded in a traditional method is solved, and the insulativity and flexibility of the core wire in the composite drag chain cable are improved.

The invention discloses a high-durability wear-resistant power cable for new energy, and relates to the technical field of cables, a plurality of textile reinforcing ropes are equidistantly embedded in the inner side of a relay limiting sleeve, a plurality of biconcave hollow plates are equidistantly bonded to the inner side end of the relay limiting sleeve, and an inner limiting reinforcing strip is connected between every two biconcave hollow plates in a sleeving manner; the inner side end of the double-concave inner hollow plate is paved with a relay elastic column, the side end of the relay elastic column is attached with an inner limiting shielding strip, the inner side end of the inner limiting shielding strip is adhered with a porous matching plate, and the inner side ends of the plurality of porous matching plates are provided with inner insulation elastic sleeves. When the cable is bent, effective elastic support cannot be carried out in the cable, and small-amplitude breakage and damage of the filler are caused, so that the overall insulation protection and support protection effects of the cable can be ensured when the cable is used, and the actual use stability and the service life of the cable are improved.

The utility model provides a charging cable and a charging system for an electric vehicle. The charging cable includes: a plurality of power conductors; and a plurality of tubes, each of the plurality of tubes surrounding a corresponding one of the power conductors, a cooling medium passage being formed between an outer circumferential surface of the power conductor and an inner circumferential surface of the tube, through which a cooling medium flows. Each of the plurality of tubes includes an offset portion, a distance in a radial direction of the tube between an inner circumferential surface of the offset portion and a central axis of a corresponding power conductor varies along a length direction of the tube in a longitudinal cross-sectional view of the tube. The charging cable provided by the utility model has good flexibility and bending degree, so that bending and distortion possibly encountered in the use process of the cable can be easily dealt with.

The invention belongs to the technical field of power cables, and particularly relates to an anti-bending flexible cable and a preparation method thereof.The cable sequentially comprises a conductor, an insulating layer, a buffer layer, a shielding layer and a protective layer from inside to outside, the insulating layer is divided into an inner layer, a middle layer and an outer layer in the radial direction, and the inner layer of the insulating layer comprises the following components in parts by weight; 100 parts of crosslinked polyethylene, 6-10 parts of amino-modified photoresponse graphene quantum dots, and 2-4 parts of a plasticizer DOS; 2-3 parts of amino modified photoresponse graphene quantum dots, 100 parts of crosslinked polyethylene and 2-4 parts of a plasticizer DOS; the protective layer comprises the following components in parts by weight; the insulation layer comprises 100 parts of shape memory polyurethane, 15-22 parts of composite microspheres and 0.5-1.0 part of a light stabilizer, and the insulation layer adopts a cross-linked polyethylene, amino modified light response graphene quantum dot gradient distribution and plasticizer system; and three-channel co-extrusion and three-section type ultraviolet curing are matched, so that inner layer under-crosslinking / outer layer over-crosslinking is avoided.