1925results about "Flexible conductors" 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 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.

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 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 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 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 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 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.

The present invention proposes a B1-class halogen-free, low-smoke, flame-retardant special cable and its preparation method. The cable comprises: a cable core formed by wrapping a control core and a power core, a flame-retardant filling rope, a wrapping layer, a flame-retardant tape layer, a total shielding layer, a ceramic fireproof layer, and an outer sheath. The present invention uses a cross-linked polyethylene sheath to form an outer layer of protection, a ceramic fireproof layer to form an intermediate shell flame-retardant insulation layer, and a flame-retardant tape layer combined with expandable graphite as an inner layer of buffer insulation, thereby achieving multiple flame-retardant insulation for the cable core, inhibiting the release of burning drips and toxic smoke with corrosion, and meeting and exceeding the B1-class flame-retardant requirements. By using low-smoke, halogen-free materials, the release of toxic gases can be reduced during combustion. At the same time, a double-layer hardness flame-retardant filling rope is twisted in the core to make the cable more round as a whole, and to allow the flame-retardant material to be fully filled into the cable core, achieving a better flame-retardant effect, and having certain buffering, compression resistance, torsional resistance, and fatigue resistance effects, thereby improving the mechanical properties of the cable.

The utility model discloses a wear-resistant flame-retardant photovoltaic cable which is high in structural strength, good in flame retardant property, wear-resistant, corrosion-resistant and aging-resistant. Comprising a cable body, a plurality of groups of cable cores are arranged in the cable body, an anti-bending block is arranged in the center of the cable body, the cable cores are arranged around the anti-bending block in a surrounding mode, and a reinforcing sheath, a flame-retardant sheath, a wear-resistant sheath and an ultraviolet-proof layer are sequentially arranged on the outer side of the cable body. And the ultraviolet-proof layer is an ultraviolet-proof coating which is coated on the outer surface of the wear-resistant sheath.

The invention discloses an indoor flame-retardant insulated flexible wire and a preparation method thereof, belongs to the technical field of flexible wires, and is used for solving the technical problem that the insulating property and flame-retardant property of an indoor flexible wire in the prior art need to be further improved. The cable comprises a wire layer formed by twisting a plurality of copper wires, an insulating layer and an outer sheath layer, a modified aminating agent taking a siloxane chain segment as a main body is prepared, polyvinyl chloride is aminated and hybridized with a space chain segment of the polyvinyl chloride at the same time, after phosphorus-hydrogen addition and surface modification, the hybridized polyvinyl chloride is obtained, and through sodium hypophosphite and 1, 2, 4-trimethyl-1, 3-pentanediol, the flame retardant is added to the polyvinyl chloride, so that the cable is formed. The preparation method comprises the following steps: carrying out phosphorus-hydrogen addition on 2, 3-dihydroxystyrene to obtain a modified cross-linking agent, forming a spherical structure by the modified cross-linking agent and phosphonitrilic chloride trimer under triethylamine and ultrasonic conditions, carrying out surface modification to obtain flame-retardant microspheres, and carrying out melt extrusion on the modified cross-linking agent and phosphonitrilic chloride trimer as main materials and auxiliary materials of an outer sheath layer to finally prepare the flame-retardant insulated flexible wire.

The invention provides a multi-core heat dissipation flexible cable. The multi-core heat dissipation flexible cable comprises an inner sheath, a heat dissipation assembly, a separation assembly and a plurality of cell assemblies, an accommodating cavity is formed in the inner sheath; the heat dissipation assembly is arranged around the periphery of the inner sheath; the partition assembly is located in the containing cavity and comprises a center piece and a plurality of partition pieces, the partition pieces are arranged around the periphery of the center piece, and a core cavity is formed between any two adjacent partition pieces; the plurality of battery core assemblies are arranged corresponding to the plurality of core cavities, the battery core assemblies are located in the corresponding core cavities, each battery core assembly comprises an electric unit and a thermal deformation structure, one side of each electric unit is elastically connected to the center piece, the electric unit can slide relative to the center piece, one end of each thermal deformation structure is connected to the inner sheath, and the other end of each thermal deformation structure is connected to the outer sheath. The other end abuts against the side, away from the center piece, of the electric unit. Wherein the thermal deformation structure is thermally coupled with the electric unit, the thermal deformation structure is configured to be heated to generate elastic deformation so as to allow the electric unit to move to be in contact with the inner sheath, and the heat dissipation assembly is configured to dissipate heat of the electric unit through the inner sheath.

The invention discloses a special cable for a complex environment and a preparation method of the special cable. The special cable comprises a cable core, a composite protection layer, an armor layer and an outer coating layer, the composite protective layer comprises an inner sheath layer, a middle reinforcing layer and an outer sheath layer; the armor layer is formed by wrapping a metal belt, the inner side of the armor layer is provided with a continuous bulge structure, and the continuous bulge structure is embedded with the spiral grooves in the surface of the outer sheath layer to form mechanical interlocking, so that displacement and looseness of the armor layer are effectively prevented; the reinforcing core body is embedded in the groove in the outer side of the metal belt, and the reinforcing core body and the metal belt are fixed through the spring piece, so that reinforcing buffering is formed, the anti-fatigue and anti-impact performance is remarkably improved, and the cable is suitable for complex working conditions of dynamic bending, torsion and frequent vibration, such as ocean cables, trailing cables and robot cables. The device has the advantages of being stable in structure, high in fatigue resistance and long in service life. The preparation method comprises the steps of spiral groove processing, metal belt pre-forming, reinforcing core inlaying, spring piece fixing, wrapping and armoring and the like, the process is reliable, and the method is suitable for large-scale production.

The invention provides a composite compression-resistant flexible cable. The composite compression-resistant flexible cable comprises an inner protective layer, an electric unit, an outer protective layer, an outer buffer assembly, an inner buffer assembly and a plurality of opening and closing assemblies, the outer 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 inner buffering assembly comprises a supporting piece and an inner sliding piece, the inner sliding piece can slide relative to the supporting piece, one end of the inner sliding piece is elastically connected to the supporting piece, and the other end of the inner sliding piece abuts against the second area part of the inner protection layer; one end of the opening and closing assembly is slidably connected to the supporting member, and the other end of the opening and closing assembly abuts the electric unit against the inner sheath. 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 based on the inner pressure, the inner sliding part slides towards the side away from the inner protection layer and abuts against the opening and closing assembly to move towards the side away from the electric unit.

The invention discloses a photovoltaic cable resistant to high temperature and long in service life and a preparation method thereof, and relates to the technical field of power cables, a Y-shaped plate is connected between the top ends of two adjacent arc-shaped plates, the Y-shaped plate is located in a gap between two adjacent conductors, and a limiting groove is welded to the outer side of a supporting sleeve and located between the two adjacent arc-shaped plates. According to the cable, when the cable burns, the expanded graphite expands, the expanded graphite is diffused into the diffusion opening, the silicone rubber layer is made of a ceramic silicone rubber material, so that the cable is not prone to cracking, and the cable is not prone to cracking, so that the service life of the cable is prolonged, the service life of the cable is prolonged, and the service life of the cable is prolonged. The ceramic silicone rubber can be quickly hardened into a hard ceramic shell after being burnt, so that expanded graphite is tightly stacked between the ceramic shell and the outer side of the conductor, the expanded graphite carbon layers stacked layer by layer are matched with the flame-retardant plate, flame is fully prevented from spreading towards the interior of the cable which is not burnt, and the flame-retardant effect of the cable is good.

The invention relates to the technical field of electric wires and cables, and discloses a fluoroplastic insulating high-temperature-resistant fireproof cable and a preparation method thereof.The cable comprises a conductor layer, the conductor layer is formed by twisting multiple strands of copper wires, the periphery of the conductor layer is coated with a fluoroplastic insulating layer, the periphery of the fluoroplastic insulating layer is coated with a shielding layer, and the shielding layer is arranged on the periphery of the conductor layer. The shielding layer is of a copper strip braided structure, the periphery of the shielding layer is coated with an armor layer, the armor layer is braided by stainless steel wires, the periphery of the armor layer is coated with a sheath layer, and the sheath layer comprises the following components in parts by mass: 50-70 parts of functionalized ethylene-tetrafluoroethylene copolymer. According to the invention, an interpenetrating polymer network formed by in-situ crosslinking of the functionalized fluoropolymer and the organosilicon elastomer is constructed in the sheath layer, and an energy field gradient response vulcanization process is adopted, so that the prepared cable sheath maintains the inherent high temperature resistance of fluoroplastic, and the flexibility and mechanical strength of the material are improved at the same time.

A photoelectric composite cable for an underwater buoy, and a preparation process therefor. A polyurethane, a self-repairing polyurethane prepolymer, and a composite nano zinc oxide are selected as an outer sheath base material. A modified polysiloxane having a B-O six-membered ring dynamic cross-linked network and a long-chain alkane group and an amino is introduced into the self-repairing polyurethane prepolymer; 5,5'-methylenedisalicylaldehyde and isophorone diisocyanate are together subjected to stepwise polymerization with the modified polysiloxane, and the 5,5'-methylenedisalicylaldehyde is cross-linked with diphenylmethane diisocyanate to obtain a self-repairing polyurethane prepolymer; and nano zinc oxide is subjected to a modification treatment, wherein dodecyltrimethoxysilane and 3-glycidoxypropyltrimethoxysilane are used for dual modification, such that super-hydrophobic nano zinc oxide having good thermal stability and high dispersity is prepared in a toluene system.