201 results about "Fluoroplast" patented technology

The invention discloses a corrosion-resistant insulating aerial cable which sequentially comprises a conductor layer, an insulating layer, a shielding layer, a corrosion-resistant layer and an outer sheath from inside to outside. The conductor layer is an aluminum alloy stranded wire of which the surface is coated with an anti-oxidation coating; the insulating layer is made of crosslinked polyethylene doped with 3-5% of nano silicon dioxide; the corrosion-resistant layer is a fluoroplastic or polyurethane coating; and the outer sheath is polyvinyl chloride added with an antioxidant and an ultraviolet light absorber. The fluoroplastic coating is formed through electrostatic spraying, and the surface of the copper wire shielding layer is subjected to phosphating pretreatment; the doped nano material enhances the mechanical strength and ultraviolet resistance of the insulating layer; the spiral groove design accelerates drainage and reduces accumulated water corrosion.

The air inlet and return pipe comprises an air inlet and return pipe body and end nuts connected to the two ends of the air inlet and return pipe body, the air inlet and return pipe body is of a bilateral symmetry structure, and internal threads are arranged on the inner circumferential surfaces of the end nuts connected to the two ends; the air inlet and return pipe body is of a double-layer structure, the outer layer is a woven mesh made of stainless steel, and the inner layer is a fluoroplastic hose. End supports are respectively arranged at the joints of the two ends of the air inlet and return pipe main body and the end nuts, and are used for connecting the air inlet and return pipe main body and the end nuts; the length of the end portions of the two sides of the fluoroplastic hose is slightly larger than that of the woven mesh, and a turnup structure is formed at the end supporting position so that a sealing structure can be formed when the end nut is in threaded connection with other parts, the flexibility of the air inlet and return pipe of the pulse tube refrigerator is guaranteed, vibration can be greatly reduced, meanwhile, gas flow resistance is reduced, and working efficiency and refrigerating capacity are improved.

The invention relates to a calender roll partition electromagnetic temperature control and infrared thermal imaging feedback system, which belongs to the field of fluoroplastic calendering thickness control equipment and comprises a data preprocessing module, a roll surface temperature zone digital twinborn analysis module, a time sequence temperature and thickness correlation module and a fusion regulation and power correction module. The data preprocessing module establishes a film surface gray scale-temperature mapping relation and outputs effective temperature data; the roller surface temperature zone digital twinborn analysis module constructs a roller surface-film surface coupling thermal field digital twinborn model to generate a temperature thermodynamic diagram, and outputs a temperature deviation value and thermal crosstalk early warning information of an independent temperature zone in combination with a temperature zone thermal crosstalk model; the time sequence temperature and thickness correlation module establishes a temperature deviation-thickness fluctuation basic correlation model and outputs thickness data; the fusion regulation and power correction module corrects the independent temperature zone coil power regulation quantity and outputs a power regulation instruction based on a multi-parameter dynamic weight distribution mechanism; the system solves the problem that traditional temperature control precision is low, and the temperature control precision and product quality of the fluorine plastic film are improved.

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.

The invention relates to a photoelectric composite cable suitable for an unmanned aerial vehicle platform, which comprises a wrapping layer formed by wrapping a covering film, an accommodating space is formed in the wrapping layer, a two-core electric unit and a one-core single-mode optical fiber are respectively placed in the accommodating space, and a plurality of aramid fibers are distributed in the accommodating space and are filled to form a cable; an insulating layer is distributed on the electric unit, an outer wrapping layer is distributed on the single-mode optical fiber, and the insulating layer, the outer wrapping layer and the covering film are all made of high-temperature-resistant fluoroplastic formed by ethylene-tetrafluoroethylene copolymer; the thickness of the covering film is 0.05 mm, and the total thickness after wrapping is 0.10 mm + / -0.02 mm; the outer diameter of the photoelectric composite cable is 2.2 mm + / -0.1 mm, and the total weight per meter is smaller than or equal to 12 g. Therefore, the whole photoelectric composite cable has better high temperature resistance, can meet high tensile strength under the condition of light weight, can realize low-loss signal transmission, and has better heat dissipation effect.

The invention relates to the technical field of industrial production, and discloses an anti-aging corrosion-resistant photovoltaic cable, which comprises an insulating layer, uniformly distributed conductors are arranged on the inner diameter of the insulating layer, an insulating layer is arranged on the outer diameter of the insulating layer, a protective layer is arranged on the outer diameter of the insulating layer, and a sheath layer is arranged on the outer diameter of the protective layer. Reinforcing layers which are uniformly distributed are arranged between the sheath layer and the protective layer, the reinforcing layers are uniformly arranged and spirally wound on the surface of the protective layer, the insulating layer is made of a modified polyolefin material, and the protective layer is formed by blending fluoroplastic and an anti-aging additive. By adopting a multi-layer structure, the antioxidant can capture free radicals generated by thermo-oxidative aging, the 2-hydroxy-4-n-octyloxybenzophenone can absorb ultraviolet rays to reduce photo-oxidative damage, the protective layer contains a hindered amine light stabilizer and can circularly capture the free radicals and regenerate antioxidant groups, and the sheath layer contains polytetrafluoroethylene micro powder and prevents corrosion medium permeation. And the comprehensive effects of aging resistance and corrosion resistance are achieved.

The utility model belongs to the technical field of detection equipment, and discloses a fluoroplastic heat exchanger leakage detection device, which comprises a heat exchanger pipeline, a detection pipeline is arranged at a pipe orifice of the heat exchanger pipeline, a pressure gauge is fixedly connected onto the detection pipeline, and a connecting assembly is further arranged on the detection pipeline. The connecting assembly comprises a support fixedly connected to the detection pipeline, a lead screw is rotationally connected to the support, a circular ring is connected to the outer portion of the lead screw in a threaded mode, a clamping block is movably connected to the support, a connecting rod is horizontally and fixedly connected between the clamping block and the circular ring, and the clamping block is fixedly connected with a fixed arc ring. A movable arc ring is hinged to one side of the lower clamping block through a hinge piece. According to the utility model, the problem that the maintenance time is increased because the heat exchange tube is inconvenient to connect and seal is effectively avoided.

The utility model relates to a fluoroplastic evaporator, and relates to the field of industrial wastewater zero discharge technology, the fluoroplastic evaporator comprises a placing assembly and an evaporator assembly, the placing assembly comprises a cylinder and two tube plates, and the side wall of the cylinder is provided with an air inlet for steam to enter, a discharge port for steam condensate water to be discharged and other tube ports; the two tube plates and the barrel are coaxially arranged, and a plurality of connecting holes are formed in the tube plates; the evaporator assembly comprises a plurality of tube nests, the tube nests are located between the two tube plates, the two ends of the tube nests penetrate through the connecting holes respectively, and the tube nests are fluoroplastic pipelines, on the premise that the manufacturing cost is not increased and the evaporation efficiency is not reduced, strong acid corrosion resistance and non-stick performance are achieved, the tube nests are not prone to scaling, or organic matter solids or crystal salt are not prone to being attached to the tube nests, and the service life of the tube nests is prolonged. The effects of no production halt maintenance, evaporation efficiency improvement and the like are achieved. Therefore, the device has the economic values of scaling resistance, adhesion resistance, corrosion resistance, production-stop-free maintenance, improvement or enhancement of the evaporation efficiency and prolonging of the service life of equipment through the tube nest.

The utility model relates to the technical field of cables, and discloses a high-strength copper-core silver-plated special high-temperature cable, which comprises a conductor and further comprises a conductor shielding layer arranged on the outer side of the conductor, an insulating layer arranged on the outer side of the conductor shielding layer, and an insulating shielding layer arranged on the outer side of the insulating layer. The inner protection layer is arranged on the outer side of the insulation shielding layer, and an outer protection layer is arranged on the outer side of the inner protection layer; according to the utility model, fluoroplastic (such as PTFE and FEP) is used as the insulating layer, the long-term tolerable temperature can reach more than 200 DEG C, the chemical corrosion resistance is strong, the high-temperature resistance of the cable is improved, the high-temperature-resistant metal braid layer (such as tinned copper) is used as the outer layer to reinforce mechanical protection, the flexible silica gel is used as the inner layer to improve the bending resistance, and the service life of the cable is prolonged. Corrugated grooves are designed in the inner wall of the protective sleeve, so that the heat dissipation area can be increased; the heat conduction filling material boron nitride filling material is embedded in the protection sleeve so that internal heat conduction efficiency can be enhanced and heat radiation efficiency in the cable can be enhanced.

The utility model relates to a head nut technical field, especially a four fluorine outer clothing head nut for fixing fluorine plastic board, including nut body, still including sealing along and installation component, nut body lower extreme fixedly connected with sealing along, nut body outer surface is equipped with a layer of polytetrafluoroethylene outer clothing, and nut body upper end is provided with installation component, the utility model discloses through sandblasting treatment surface, and polytetrafluoroethylene powder is evenly sprayed on the nut body surface, and the dense outer clothing layer is formed through high -temperature sintering, through the high chemical stability and high temperature resistance of polytetrafluoroethylene outer clothing, make the nut service life extension, through filling high -temperature sealant and three millimeter thick soft four fluorine round pad or three millimeter thick high -temperature fluorine rubber pad in the sealing groove, further promote the sealing performance, solved because PTFE board itself welding fusibility just has no PFA effect good, and the welding firm degree is lower, and fluorine plastic cap is easy to crack under the flue harsh environment, causes the corrosion of bolt, leads to the problem of poor sealing.

The utility model belongs to the field of aviation product assembly quality improvement, and relates to a device for assembling a small fluoroplastic sealing ring. Comprising an ejector rod (1), a shaping rod (2), a guide sleeve (3), a shaping block (4) and a valve block (6), a first connecting hole with the diameter being D and a second connecting hole with the diameter being C are formed in the two ends of the shaping block (4), and the guide sleeve (3) is connected with one end of the shaping block (4) through the first connecting hole; the valve block (6) is connected with the other end of the shaping block (4) through the second connecting hole; the shaping block (4) is provided with a variable-diameter hole which is changed from the diameter A of one end to the diameter B of the other end, and the upper end face of the shaping block (4) is provided with a groove used for containing the shaping rod (2); the through hole with the diameter A, the through hole with the diameter B, the through hole of the guide sleeve (3) and the through hole of the valve block (6) are coaxial; the outer diameter of the acting part of the ejector rod (1) is the diameter B. The diameter A is equal to the outer diameter of the fluoroplastic sealing ring (5), and the diameter B is the hole diameter of a mounting hole of the valve block (6).

Support membranes for filters are described that include a support sheet formed of a polymeric material and a continuous base section having opposed outer surfaces and spaced-apart ribs extending outwardly from at least one of the opposed outer surfaces. The spaced-apart ribs define continuous flow channels bound by the adjacent spaced-apart ribs. The ratio of the height of the ribs to the height of the continuous base ranges from about 2:1 to about 5:1. This relatively high aspect ratio of the ribs and the base layer increases the performance of the filter and reduces the cross-flow pressure drop of fluids filtered through the membrane.

The application relates to the technical field of electric wire and cable, and discloses a fluoroplastic insulation high-temperature-resistant fireproof cable and a preparation method, the cable comprises a conductor layer, the conductor layer is twisted by multiple copper wires, the conductor layer is coated with a fluoroplastic insulation layer, the fluoroplastic insulation layer is coated with a shielding layer, the shielding layer is a copper-belt woven structure, the shielding layer is coated with an armor layer, the armor layer is woven by stainless steel wires, the armor layer is coated with a sheath layer, and the sheath layer comprises the following components in mass fractions: functionalized ethylene-tetrafluoroethylene copolymer, 50-70 parts by mass. The application constructs an interpenetrating polymer network formed by in-situ crosslinking of a functionalized fluoropolymer and an organic silicon elastomer in the sheath layer, and adopts an energy field gradient response vulcanization process, so that the prepared cable sheath keeps the inherent high-temperature resistance of fluoroplastic, and the flexibility and mechanical strength of the material are improved.

The invention relates to the technical field of preparation of fluoroplastic foaming materials, and discloses a preparation device of a foaming FEP material, which comprises an equipment shell, and an FEP preparation operation assembly, a waste gas treatment assembly, a waste liquid treatment assembly, a water quality purification assembly and a rotary drying assembly which are arranged in the equipment shell or on the side surface of the equipment shell. According to the device, cooling water is subjected to ion exchange treatment through the water quality purification assembly, a product is subjected to three-dimensional dead-corner-free drying through the rotary drying assembly, and water marks and hard spots are effectively prevented from being generated on the surface of a material; meanwhile, through cooperative work of the integrated waste gas treatment assembly and the waste liquid treatment assembly, harmless treatment is conducted on the production waste gas, the treated waste liquid is purified and then recycled, and closed-loop utilization of resources is achieved. The device highly integrates a plurality of functional modules, is compact in structure and high in automation degree, and solves the problems of poor product surface quality and low environment-friendly treatment efficiency in the prior art.

The invention discloses a membrane separation method of a rubber laminated rubber plug, and solves the problems that the recovery efficiency of leftover materials and wastes of the rubber laminated rubber plug is low, the pollution is serious and a regenerated material cannot meet the cleaning standard in the traditional process. According to the method, separation is realized through chemical and physical synergistic effects: a natural or organic release agent and a cleaned laminated rubber plug are mixed and infiltrated in a chemical path, and a matrix and a laminated film are separated after the binding power is weakened through swelling; according to the physical path, supercritical fluid is utilized to swell the film-covered rubber plug under specific conditions, and the base body and the covering film are directly stripped. The method is suitable for density-matched single-layer film-coated rubber plugs, and film-coated materials comprise polyester, fluoroplastic and the like. The release agent and the fluid can be recycled, so that no pollution risk is caused. The separated material is stable in performance and meets the regeneration requirement. The method breaks through the limitation of high energy consumption and high pollution in the traditional technology, has the advantages of environmental protection, low energy consumption and industrial adaptation, and provides an innovative scheme for recycling leftover materials and wastes of the rubber laminated rubber plug.

The utility model provides a low-temperature-resistant winding dragging cable, which relates to the technical field of wires and cables and comprises an outer insulating sleeve, conductors distributed in an annular array are arranged inside the outer insulating sleeve, an inner insulating layer is fixedly sleeved outside the conductors, and a moisture-proof layer is fixedly sleeved inside the outer insulating sleeve. By adopting the combination of various adaptive materials such as the outer insulating sleeve made of fluoroplastic and the inner insulating layer made of silicon rubber, the cable can work normally in an extremely low-temperature environment of lower than-40 DEG C, maintains stable electrical insulation and protection performance and the like, and can be used for protecting the cable under the action of external force such as frequent dragging and bending and the like. By means of good flexibility guaranteed by the oxygen-free copper multi-strand stranded conductor, stability of reasonable structure matching of all layers and external protection provided by the thickened sheath, the problems of internal structure damage, conductor breakage and the like can be avoided, it is ensured that the overall performance of the cable is reliable, and the cable can better adapt to low-temperature complex application scenes needing winding and dragging.

The utility model provides a super flexible shielding cable, the cable core comprises a central cable core, a first cable core and a second cable core, the first cable core and the second cable core are sequentially arranged outside the central cable core from inside to outside, the first cable core comprises a control signal line unit and a high frequency communication signal line unit, and the control signal line unit and the high frequency communication signal line unit are alternately arranged. The second cable core comprises a plurality of control signal lines, the control signal line unit, the high-frequency communication signal line unit and the control signal lines respectively comprise a tightly-pressed tinned copper wire conductor and a fluoroplastic copolymer insulating layer arranged on the outer side of the tightly-pressed tinned copper wire conductor, and a first tinned copper wire braid layer is arranged on the outer side of the cable core; the cable can effectively transmit large current and high-frequency signals in a high-temperature environment, the ultrahigh shielding rate can effectively block interference of electromagnetic waves, the stability of transmitted signals is ensured, the flexibility of the cable is improved, the cable has good flexibility and fatigue resistance, and the service life of the cable is greatly prolonged.

The application relates to the technical field of winding wires, and discloses a high-temperature-resistant submersible motor winding wire and a preparation method thereof. The high-temperature-resistant submersible motor winding wire comprises a wire core and a fluoroplastic insulation layer coated on the wire core; the wire core comprises, from inside to outside, a conductor formed by twisting copper wires and a polyimide film layer; a sheath layer is arranged outside the fluoroplastic insulation layer; the sheath layer comprises the following raw materials in parts by weight: polyether ether ketone 35-45 parts, polytetrafluoroethylene 20-30 parts, acrylate rubber 5-15 parts, nano inorganic filler 5-10 parts, antioxidant 0.5-1 part and inorganic fiber 3-9 parts; the melting index of the polyether ether ketone is 10-30 g / 10 min under 380 DEG C and 10 kg. Through the technical scheme, the problem of poor high-temperature resistance of the submersible motor winding wire in the related art is solved.

The invention relates to an efficient petroleum pipeline anti-drag conveying system based on photo-thermal coupling phase change temperature control. The efficient petroleum pipeline anti-drag conveying system comprises an oil conveying unit, a photo-thermal conversion unit, a heat exchange unit and a heat storage unit. The oil conveying unit comprises two flexible flame-retardant PCMs which are attached to the wall of the oil conveying pipeline and have different phase transition temperatures, and the vortex-shaped coil pipe is coiled in the PCMs; the light-heat conversion unit comprises a groove type condenser erected on the bottom face, right opposite to the oil conveying pipeline, of the oil conveying pipeline and is controlled by a solar tracking device, a rotating shaft and a speed reducer to implement single-shaft tracking. The heat exchange unit comprises a U-shaped pipe type fluoroplastic heat exchanger communicating with the heat storage unit and the oil conveying unit, a fluoroplastic U-shaped pipe is fixed through a fixing rotary knob and is detachable, and a heat exchange cold medium is nanofluid with the Al2O3 mass fraction being 5 wt%. The heat storage unit comprises a double-cavity phase change heat storage tank with two cavities, and a spiral heat pipe of a high-temperature cavity is filled with heat storage microcapsules. According to the invention, efficient anti-drag transportation of the petroleum pipeline is realized by using the photo-thermal coupling phase change material.

The utility model belongs to the technical field of cables, and particularly relates to a reinforced signal transmission cable, which comprises a core body formed by twisting a plurality of thin conductors, and further comprises a reinforcing rib twisted between two adjacent thin conductors at the periphery of the core body, and the reinforcing rib comprises an aramid fiber belt and a fluoroplastic belt; it can be understood that the reinforcing ribs are formed by spirally winding the aramid fiber tapes and the fluoroplastic tapes, and are tightly distributed in gaps between the adjacent conductors in a spiral embedding manner, so that the cable is endowed with excellent tensile and anti-torsion characteristics while the structure is compact; the shielding sleeve with a three-layer composite shielding structure is adopted, so that the overall mechanical strength is synchronously improved on the basis of enhancing the electromagnetic shielding effectiveness; and the outer sheath is structurally reinforced by adding short fibers in the middle layer, and is matched with grooves designed in the surface of the outer layer to form a three-dimensional heat dissipation channel, so that the heat dissipation effect is remarkably improved while the mechanical stability is ensured.

The utility model discloses a motor lead cable. The motor lead cable sequentially comprises a conductor, a cable core and a cable core from inside to outside, the polyimide insulation protection layer is arranged on the outer side of the conductor in an overlapped wrapping manner; the fluoroplastic insulating layer is arranged on the outer side of the polyimide insulating protective layer in an extruding manner; and the raw adhesive tape wrapping protection layer wraps the outer side of the fluoroplastic insulating layer and is adhered to the fluoroplastic insulating layer in a hot melting adhesion manner to form an integrated structure. The cable adopts a three-layer conductor protection technology, the polyimide insulation protection layer greatly enhances the mechanical performance and the high temperature resistance of the cable, the fluoroplastic insulation layer improves the insulation performance and the sealing performance of the cable, and the raw adhesive tape wrapping protection layer can improve the flexibility and the toughness of the cable, so that the cable is easy to shape and penetrate into a hole, and the service life of the cable is prolonged. And the motor has waterproof performance, high temperature resistance, scratch resistance and the like, so that the stability of the motor in the assembly and operation processes is ensured.

The invention relates to a three-layer structure machine head for electric wires and cables, and belongs to the technical field of electric wire processing machinery, the three-layer structure machine head comprises feeding flanges, a machine head main body, a machine head support, a three-layer ceramic core, a mold group, a control part and a vacuumizing component, the feeding flanges comprise a middle-layer feeding flange, an outer-layer feeding flange and an inner-layer feeding flange, and the three feeding flanges are all provided with heat preservation cotton; the middle-layer feeding flange is connected with the foaming main machine, the outer-layer feeding flange and the inner-layer feeding flange are used for extruding the innermost layer and the outermost layer of an electric wire, and the vacuumizing part is mounted at the machine head main body. According to the invention, by optimizing the machine head structure, especially the taper design of the three-layer ceramic core, the three-layer material of the fluoroplastic wire can be highly concentrically and stably extruded and molded, the processing efficiency and the product quality are obviously improved, meanwhile, the material distribution of each layer is uniform, the interlayer is clear, and the requirement of the fluoroplastic wire for high-quality production is met.

The invention belongs to the technical field of wire manufacturing, and discloses a high-temperature-resistant large-current-carrying wire for aviation and a preparation method. According to the invention, the nickel-plated flat copper wire is adopted, the insulating inner layer is made of high-temperature-resistant ECA fluoroplastic, and the insulating outer layer sheath is of a modified high-temperature-resistant ECA fluoroplastic structure with high thermal conductivity and high wear resistance, so that the long-term use temperature of the wire cable can reach 300 DEG C; under the same environment and copper conductor cross section, the downloading flow is improved by 25%; meanwhile, the carbon fiber and the glass fiber are added to the insulating outer layer, so that the cut-through resistance and the wear resistance are improved by 100%, and the problems that the temperature resistance grade is only 260 DEG C, the current-carrying capacity is insufficient, the cut-through resistance and the wear resistance of the outer layer of the wire are insufficient, and the wire is easy to damage and the like in an existing aviation wire and cable are effectively solved.

The utility model relates to a waterproof flame-retardant mining cable sheath and a cable, which belong to the technical field of mining cables, and comprise three cable conductors, and the outer sides of the three cable conductors are provided with a cable sheath body. The beneficial effects of the utility model lie in that in the working process, the cable conductors are protected by the insulating layers, so that safe transmission of current can be ensured, the inner sheath provides basic insulation and flexibility, and the modified polyurethane material of the middle layer effectively prevents moisture intrusion and fire accidents through excellent waterproof and flame-retardant properties, so that the cable is suitable for popularization and application. The fluoroplastic material of the outer protective layer provides extra weather resistance and chemical corrosion resistance, long-term stable operation of the cable in a severe environment is ensured, the waterproof performance of the cable sheath body is improved through the effect of the nano silicon dioxide coating, moisture invasion is effectively prevented, and the service life of a cable conductor is prolonged.

The invention relates to a fluoroplastic evaporator, and relates to the field of industrial wastewater zero discharge technology, the fluoroplastic evaporator comprises a placing assembly and an evaporator assembly, the placing assembly comprises a cylinder and two tube plates, and the side wall of the cylinder is provided with an air inlet for steam to enter, a discharge port for steam condensate water to be discharged and other tube ports; the two tube plates and the barrel are coaxially arranged, and a plurality of connecting holes are formed in the tube plates; the evaporator assembly comprises a plurality of tube nests, the tube nests are located between the two tube plates, the two ends of the tube nests penetrate through the connecting holes respectively, and the tube nests are fluoroplastic pipelines, on the premise that the manufacturing cost is not increased and the evaporation efficiency is not reduced, strong acid corrosion resistance and non-stick performance are achieved, the tube nests are not prone to scaling, or organic matter solids or crystal salt are not prone to being attached to the tube nests, and the service life of the tube nests is prolonged. The effects of no production halt maintenance, evaporation efficiency improvement and the like are achieved. Therefore, the device has the economic values of scaling resistance, adhesion resistance, corrosion resistance, production-stop-free maintenance, improvement or enhancement of the evaporation efficiency and prolonging of the service life of equipment through the tube nest.

This invention relates to the field of power cable technology and proposes a cross-linked polyethylene insulated power cable with a fluoroplastic flame-retardant layer. The cable comprises several stranded conductors, each of which is sequentially covered from the inside out with a cross-linked polyethylene insulation layer, a shielding layer, and a fluoroplastic flame-retardant layer. It also includes a filler layer, support frames, an early warning support assembly, and a flame-retardant assembly. A filler layer is disposed between the conductors, and the filler layer is sequentially covered with a wrapping layer, an armor layer, and a sheath layer. Several support frames are spaced apart at the bottom of the sheath layer, each support frame is equipped with an early warning support assembly, and flame-retardant assemblies are disposed on both sides of each support frame. The flame-retardant assemblies are installed on the sheath layer. This technical solution solves the problem in the prior art where it is difficult to detect localized temperature rise in the cable before a fire occurs and to provide early warning, leading to difficulties in effectively suppressing fires.

The invention discloses an ultra-flexible low-temperature-resistant ice-resistant cable for a high-speed railway in an extremely cold region, and the cable is characterized in that nylon wires are added in a conductor structure as a supporting skeleton, and cooperate with small-diameter copper wires to reduce the overall rigidity, thereby achieving ultra-flexibility; the conductor wrapping layer adopts a carbon fiber braid layer, so that the electrical stability is improved while the low-temperature bending fatigue life is prolonged; according to the three-layer gradient functional co-extrusion insulating layer system, nano aluminum oxide is added into a polypropylene material in the inner layer to improve the corona initial voltage, the fluoroplastic FEP aerogel in the middle layer reduces the elastic modulus at the ultralow temperature, and the modified polyurethane elastomer in the outer layer reduces the surface energy and the ice adhesion. Therefore, the ultra-flexible low-temperature-resistant ice-resistant cable for the high-speed railway in the extremely-cold region has the advantages of good flexibility in an extremely-cold environment, high oxidation resistance, high electrical stability, ice resistance and mechanical damage resistance.

The invention discloses a super-lubricating blood vessel puncture sheath tube material tube and a preparation method thereof, and belongs to the technical field of medical instruments. The material pipe is prepared from fluoroplastic, a slipping agent, an antioxidant and a developing agent according to a specific weight part ratio. The core of the invention lies in that the traditional surface coating technology is replaced by material body modification, the thermodynamic incompatibility of the slipping agent and fluoroplastic is utilized, and the slipping agent spontaneously migrates to the inner and outer surfaces of the pipe in the thermal process of extrusion molding to form a stable and uniform nano / micron lubricating film, so that the material pipe is endowed with an ultralow dynamic friction coefficient. The preparation method comprises two working procedures of prefabricated material preparation and pipe extrusion, a unique gradient cooling shaping process is adopted after pipe extrusion, and the migration behavior of a slipping agent is accurately regulated and controlled to optimize formation of a lubricating film. The problems that a lubricating layer of a traditional coating sheathing canal is prone to abrasion, the inner wall is difficult to cover evenly, biological safety risks exist and the process is complex are fundamentally solved, and the prepared material tube has the comprehensive advantages of being durable in lubrication, high in biological safety, reliable in mechanical property, clear in development and low in production cost.

This utility model provides a highly flexible wire, comprising: a cable core, with a sheath on the outside of the cable core; the cable core includes: multiple core wires, each core wire including: a conductor and a fluoroplastic insulation layer disposed on the outside of the conductor; the conductor includes: tinned copper wire, multiple tinned copper wires and / or the bulletproof reinforcing filler wire are twisted together to form the conductor; the sheath includes: a polyester fiber braided mesh disposed on the outermost layer. This invention overcomes the technical bottlenecks of flexible cables in terms of mechanical strength, temperature resistance, and dynamic durability, enabling use in environments with frequent movement, and solving the requirement for high temperature resistance. It ensures the cable's abrasion resistance while enhancing overall flexibility and extending the wire's service life.