168results about How to "Tensile" patented technology

The invention relates to a concrete maintenance and reinforcement treatment method. The method comprises the following steps: (1) carrying out nondestructive treatment on the concrete base surface defects; (2) carrying out rust-proof treatment on reinforcing bars; (3) carrying out concrete alkalinity recovery treatment; (4) carrying out concrete crack repairing treatment; (5) daubing new and old concrete adhesives; (6) daubing inorganic polymer mortar and carrying out curing; (7) sticking carbon fiber cloth; (8) brushing an inorganic water and salt injury resistant concrete protective agent; and (9) brushing a surface self-cleaning material, thus completing construction. The method has the following beneficial effects: rust can be removed or prevented from the reinforcing bars to protect the reinforcing bars and prevent further corrosion; by adopting the carbon fiber cloth for reinforcement, the concrete structure has the characteristics of high strength, light weight, simpleness and convenience in construction and corrosion resistance; the bearing capability of the beam body is improved; the deflection of the structure is reduced; the construction efficiency is greatly improved by adopting the airless spraying and coating operations; the coating is saved by 30%; and by brushing the self-cleaning material, the structure has the self-cleaning capability, thus avoiding cleaning or reducing the cleaning frequency.

The invention provides a soft robot based on shape memory alloy driving. The soft robot has the characteristics of being simple in structure, capable of moving in multiple poses, good in environmental adaptation and the like. A single chip microcomputer is controlled to sequentially power on shape memory alloy wires embedded in the robot, the six shape memory alloy wires are arranged in a robot body, and an alloy wire overlapping structure is used for driving the robot to move forwards and backwards. The robot is provided with four feet, each foot comprises two shape memory alloy wires, the forward moving direction of the robot is changed by means of flexibility of the alloy wires, and multi-pose movement is achieved. A top heat dissipation structure can increase the movement speed of the root. A bottom tooth-shaped structure is beneficial to jacking up a silica gel outer shell in the mode that the alloy wires are powered on to retract. Supporting structures on the front side and the rear side serve as contact points of a supporting surface in movement, and friction force with the surface can be reduced in movement.

The invention discloses a production method of fireproof middle and high voltage cables. The production method includes the following steps: sorting; wire drawing; annealing; conductor stranding; inner shielding layer, insulation layer and outer shielding layer co-extrusion and warping; metal shielding layer arranging; first wrapping tape layer lapping; cabling stranding and cabling wrapping tape layer lapping; oxygen isolation layer extrusion; package fireproof isolation layer extrusion; second wrapping tape layer lapping; metal armor layer lapping; third wrapping tape layer lapping and outer sheath layer extrusion. The middle and high voltage cables produced in the production method have good heat insulation effect when being paved on buildings, are improved in fireproof performance, can delay damage to a power system caused by fire disasters, natural disasters and other accidents, and gains time for rescue.

The related manufacture technique for a special non-woven fabric with polyester staple fiber and LMF4080 fiber low-melting fiber as main constituent comprises: mixing, opening, feeding cotton, carding, placing net, pre- embroidering, primary embroidering, thermal treating with a cluster hot-rolling mill with surface temperature as 120-195Deg, forming or tenter-type hot-air forming at 130-230Deg or the combination of cylinder-type hot-air forming at 120-195Deg and rolling with a cluster hot-rolling mill, and packing. This product contains no any harmful chemical material (such as formaldehyde) fit to spread.

The invention provides a slide layer for longitudinal isolation devices on bridge tracks. The slide layer is arranged below a longitudinal partition wall between a track and a bridge; the slide layer is positioned in the direction of the bridge length; both ends of the slide layer can be expanded to limit table across an abutment; the width of the slide layer is bigger than that of the track; the slide layer comprises an top-arranged film layer, an intermediate sliding film and a bottom-arranged film layer; the top face of the top-arranged film layer of the slide layer is adhered to the bottom face of the longitudinal partition wall; the bottom face of the bottom-arranged film layer is stuck to the top face of the bridge beam body. The invention has advantages of anti-friction, tensile resistance, anti-freezing, creep-resisting, anti-corrosion and having weather ability performances; meanwhile, the invention can meet the requirements for lower friction factor and low friction loss. Besides, the invention also has advantages of perfect processing performance, being economic and practical and low price. Therefore, the invention meet requirements of bridge track longitudinal isolation devices for slide layers.

The invention provides a reinforcing construction method in partial failure repairing of a rural cement pavement. The reinforcing construction method comprises the following steps: excavating an old concrete pavement needing to be repaired to the top surface of a roadbed and cleaning; cutting the excavated old concrete pavement and thus cutting the pavement into an inclined plane along the thickness direction of the road surface; respectively paving one layer of steel wire net on each of the bottom and the middle pat of the inclined section; paving thread steel bars and extending to a road surface region needing to be newly poured; pouring concrete into an excavated region of the old road surface to form a new concrete road surface. The invention aims to solve the road surface crushing problem in old cement road surface diseases of rural highways and useful resources including steel wires, steel bars and the like which are usual in villages can be effectively utilized; the engineering cost is saved and a repairing technology is simple, so as to provide a simple, economical and effective method for repairing the road surfaces of rural roads.

The invention provides a multifunctional size for andalusite fibers, which uses an organic compound containing flexible chains in molecules as a main body and compounds a plurality of auxiliary agents. The size comprises the following components in percentage by weight: 0.5-1.5 percent of film forming agent, 1-10 percent of softening agent (penetrating agent), 0.05-0.3 percent of antistatic agent(antiseptic), 0.01-0.2 percent of dispersant, 0.01-0.07 percent of coupling agent, 0.05-0.1 percent of catalyst and the balance of tap water. The size has good convergence, lubricating property, filmforming property, antistatic property and antiseptic characteristic. Not only fibers processed through the size have flexible, anti-bending and anti-stretching characteristics, but also the fibers sprayed with the size have good dispersive property in water and can be used for the surface soakage treatment of multiple silicate fibers.

The invention belongs to the technical field of mining shock-resisting supporting and particularly relates to a fault-passing roadway waterproof damping and shock-resisting coupling support method. The fault-passing roadway waterproof damping and shock-resisting coupling support method includes sequentially setting a surrounding rock plastic ring, a damping support ring and two layers of tiles from surrounding rocks of the fault to a roadway, forming the surrounding rock plastic ring by the surrounding rocks in an artificial blasting manner, and paving cement-based glass fibers on the inner surface of the surrounding rock plastic ring to form the damping support ring; paving two layers of the tiles on the inner surface of the damping support ring, wherein the tiles on the outer layer is outer waterproof tiles, and the tiles on the inner layer are inner tiles; enabling an anchorage rod to be perpendicular to the outlines of the tiles and sequentially penetrate the tiles, the damping support ring and the middle of the surrounding rock plastic ring to form a fixed coupling, and paving ballasts on the ground of the roadway and the upper surfaces of the tiles. By the method, support intensity is high, buffering and damping and shock resistance are high, and waterproof effect is good.

The invention relates to a construction method for preventing a repaired crack from cracking, which relates to the construction process for blocking and repairing a crack. The method comprises the following steps of: a, painting a solvent which can merge both dust and asphalt on the crack so as to eliminate the influence on the adhesion between a material for blocking and repairing the crack and the crack; b, spraying high-strength fibers with proper lengths and sizes on the crack, wherein the longitudinal direction of most of the fibers and the trend of the crack are intersected to be mutually overlapped or form a meshed structure; and c, pouring the asphalt or a macromolecular sizing material into the crack, or sticking a band-shaped repairing material to ensure that the fibers and the material for blocking and repairing the crack are automatically adhered together. In the construction method, the coated solvent merges loose dust on the crack as well as the asphalt on the surface layer of the crack, so that the repairing material is prevented from being separated from a crack layer; the sprayed fibers and the trend of the crack are intersected to be mutually overlapped or form the meshed structure; and the repairing material is adhered to the merged fibers, thus the crack can be blocked and repaired so as to form a high-retractility and low-temperature cracking-resistant road surface.

The invention discloses a hook-shaped steel core composite connecting piece prefabricated sandwiched heat insulation wallboard and a manufacturing method thereof .Internal and external acanthuses are formed by pouring concrete, a middle sandwich layer is a heat insulation board, and the three-layer structure is connected into a whole through hook-shaped steel core composite connecting pieces, wherein the hook-shaped steel core composite connecting pieces are hook-shaped reinforcing steel bar core continuous fiber composite connecting pieces and high-strength steel wire core model plastic compression molding steel core composite connecting pieces .The steel core composite connecting pieces of each kind are of a straight insertion type and an oblique insertion type .The internal and external concrete acanthuses are connected together through the straight insertion type hook-shaped steel core composite connecting pieces in a 90-degree orthogonal mode, and hook heads of the connecting pieces can hook an eternal acanthus internal reinforcing steel bar net; the internal and external wall acanthuses are connected together through the oblique insertion type steel core composite connecting pieces in a 45-degree oblique crossing mode .The prefabricated concrete sandwiched heat insulation external wall has the advantages of being high in anti-shear and anti-bending performance, good in heat insulation effect, high in construction efficiency, low in manufacturing cost, safe and reliable to use and the like .

The invention discloses a production method for conductors for fire-resistant middle-high voltage cables. The method includes steps of material selection, wire drawing, annealing, conductor hinging, co-extrusion and coating of an inner shielding layer, an insulation layer and an outer shielding layer, setting of a metal shielding layer, extrusion of a phase-separation fire-resistant insulation layer, winding of a first wrapping tape layer, cabling twisting and winding of cabling belting layer, winding of a metal armored layer, winding of a second wrapping tape layer and an outer sheath layer extrusion, wherein during the extrusion of the phase-separation fire-resistant insulation layer, ceramic silicon rubber materials are extruded on the metal shielding layer through a silicon rubber extruder, and the extruding thickness is 2.0mm-4.0mm. According to the method, the phase-separation fire-resistant insulation layer is arranged, the silicon rubber extruder is used for extrusion of the ceramic silicon rubber materials, therefore the materials are provided with good thermal insulating effect, ceramic bodies are fired by flames at a high temperature and provided with a certain mechanical strength and good electrical insulation performance due to the fact that the major material is inorganic silicon, so that the fire-resistant performance of the cables can be improved.

The present invention relates to a heat insulation dry-mixing composition, a plastering method thereof and a board prepared by the composition. The heat insulation dry-mixing composition comprises the following components mixed according to a weight ratio: 15-2000 parts of hollow glass ball, 0.3-15 parts of short silk fiber, 5-200 parts of gypsum powder, 1-150 parts of emulsion powder, 0.3-150 parts of cellulose and 15-2000 parts of cement. The heat insulation dry-mixing composition of the invention has the advantages of low cost, excellent heat insulation effect, no aging, no cracking, no breaking-off and fire resistance. At the state of same thickness, the board prepared by the heat insulation dry-mixing composition according to the invention has better heat insulation effect compared with the heat insulation plate prepared by polystyrene material and perlite material. Furthermore the heat insulation dry-mixing composition and the board prepared by the composition can be directly adhibited and installed on the outer wall of building and have same lifetime with the building. The heat insulation dry-mixing composition is a novel product which gives attention to the convenient operation, low producing cost and environment-protecting energy-saving requirements.

Canvas for a canoe comprises gray fabric, an inner coating and an outer coating, wherein the gray fabric is filament woven plain cloth, the inner coating is prepared from, by weight, 25-35% of polyvinyl chloride paste resin, 10-30% of dioctyl phthalate, 10-20% of dioctyl adipate, 8-10% of polyester type plasticizer, 20-35% of light calcium carbonate, 2-5% of lead oxide phosphite hydrate, 1-3% of titanium dioxide, 0.1-1.5% of preservative, 0.5-3% of flame retardant and 1-2% of pigment, and the inner coating is 0.5-1 mm thick; the outer coating is a polypropylene calendering film and is prepared from, by weight, 60-70% of polypropylene resin, 0.3-0.8% of ultraviolet light absorber, 15-30% of flame retardant, 10-15% of glass fiber and 0.6-1% of pigment, and a polyamide film which is purchased from market and 0.2-0.4 mm thick can also be adopted. A method for preparing the canvas mainly comprises the steps of padding and sizing, plasticizing in an oven, surface flattening and cooling into coils.

The invention relates to a polylactic acid-plant fiber composite degradable material which is mainly prepared by the following steps: catalyzing high polymer starch polylactic acid by a catalyst at high speed and high temperature to change the molecular weight, thereby obtaining a plastic four-way-tensile polylactic acid master batch; grinding agricultural waste or residual waste after agricultural processing at high speed by utilizing the physical principle of cooling to obtain powder with required particle size, sterilizing at high temperature, and carrying out emulsification polymerization with starch to obtain a plant fiber filler; and finally, mixing the polylactic acid master batch, plant fiber filler and modifier according to required proportion, polymerizing at high temperature (190-210 DEG C) to obtain the biodegradable composite raw material applicable to various natural, non-toxic, green and environment-friendly products.

The invention discloses a total cross-section water-stop sealing multi-signal composite cable including a cable core, an inner protection layer, a shielding layer and an outer protection layer. The cable core is externally provided with a wrapping tape. The inner protection layer and the outer protection layer are formed outside the wrapping tape through extrusion. The shielding layer is formed ina braiding manner between the outer protection layer and the inner protection layer. A wrapping tape is also arranged between the shielding layer and the outer protection layer. The cable core is formed by twisting an optical unit, a power line, a coaxial line, a twisting pair and a filler rope in a spiral manner. The twisting gap of the cable core and the gap in the shielding layer are both filled with filler glue. Each of the power line, the coaxial line, the twist pair and the outer protection layer in the composite cable is therein provided with a braided shielding layer, water-resistingand wear-resisting chemical material is adopted for a sheath, and the gaps among the different units are filled with water-stop filler glue. Therefore, the composite cable provided by the invention has a capability of total cross-section high pressure resistance and water leakage prevention. In underwater application, the composite cable can provide optical fibers for transmitting optical signalsand can also provide a power line for transmitting control signals, a coaxial line for transmitting radio frequency signals and a twisting pair for transmitting communication signals. Besides, the composite cable provided by the invention is small in product size, diversified in functions and stable in transmission.

The invention discloses a solar anti-corrosion high-voltage line iron tower monitoring system of a power supply system. The solar anti-corrosion high-voltage line iron tower monitoring system comprises a tower head, a tower body and tower feet and further comprises a wireless tilt angle sensor, a temperature sensor, a video detector, a video control circuit, a solar assembly, a power supply battery, an anti-thunder module, a data processor, a date counter, a wireless transmission module which are arranged on the tower body, a wind power sensor arranged on the tower head and settlement monitors arranged on the portions, stretching into a concrete base layer, of the tower feet, the wireless transmission module is used for being connected with a monitoring center in a communication mode, and reinforcing ribs on the tower head can release transverse force and enhance the strength in the longitudinal direction of the iron power. The reinforcing ribs are arranged at an angle relative to the horizontal plane and can bear a part of transverse supporting force and ensure longitudinal rigidity. In the swing process of the iron tower, the reinforcing ribs arranged in a rhombus shape have certain resilience force, and the iron tower can be kept in a fixed posture and prevented from swinging at too large amplitude.

The wall adhesive powder consists of cement 100 weight portions, dry sand 50 weight portions, fly ash 30-35 weight portions, lime 40-50 weight portions, hydroxypropyl methyl cellulose ether 1-2 weight portions, wood fiber 3-4 weight portions, redispersive gelatin powder 6-8 weight portions, air entraining agent 0.06-0.08 weight portions, and PP fiber 0.2-0.3 weight portions. The wall adhesive powder for building has the advantages of firm adhering, high pressure strength, high tensile strength, excellent antiseepage performance, anticracking, low cost, etc.

The invention relates to a permanent magnetic suspending bearing used as high-speed long-time continuous-rotation turbine mechanics. The turbine blades (1) are mounted on the end of a rotor, annular permanent magnetic steels (2, 5, 8) are mounted on the rotor, annular permanent magnetic steels (3, 4, 6, 7) are mounted on a stator, the annular permanent magnetic steels (2, 3) are in same size as the annular permanent magnetic steels (7, 8) while they are coaxially arranged in same direction with adsorption between and radial bearing function, the annular permanent magnetic steels (4, 5, 6) are different in size, but coaxially arranged in same direction with counter force to confirm the axial balance and stability of rotor. When rotation speed reaches preset value, the rotation inertia of rotor can confirm the rotor stably rotates. The invention has the advantages in non mechanical contact between the rotor and the stator, non mechanical abrasion, and continuous service.

The invention discloses a method for preparing high-performance concrete and application. The method comprises the following steps of: designing a concrete mixing proportion; sequentially adding fine aggregate, engineering fibers and gel material into a stirrer, and stirring till the engineering fibers are uniformly distributed; and adding water to prepare mortar, adding coarse aggregate, stirring uniformly, and adding an admixture to obtain the high-performance concrete required by design. The prepared high-performance concrete can be used for preparing high-performance concrete products. The method is simple and convenient for processing; the length of the utilized engineering fibers is easily controlled, so that the concrete has good workability, the forming velocity and the production efficiency are improved, the concrete has the advantages of tensile resistance, shearing resistance, cracking resistance, fatigue resistance, high toughness and the like, and concrete cracks caused by temperature stress can be reduced; the microstructure of the cement slurry is improved, and the compactness of the concrete is increased, so that the strength and the durability of the concrete are improved, and the service life of the concrete is prolonged; and the concrete has good safety and economic and social benefits.

The invention discloses a goaf overlaying basic top rock stratum dynamic settlement amount observation device and method, and belongs to the technical field of mining pressure observation of coal mines. The device comprises a measuring unit, a transmission unit and a receiving unit, wherein the measuring unit is a measuring sensor probe; during actual observation, the measuring sensor probe is installed in a test drilling hole, and comprises a resin medical bag, a displacement sensor, a fixing mechanism and a fastening claw; the measuring sensor probe is used for fixing the displacement sensorand the rock stratum where the displacement sensor is located to move along with the rock stratum at the same time, and observing and recording the settlement amount of the rock stratum and performing real-time analysis on the movement condition of the rock stratum through a data receiver; the transmission unit comprises a data transmission wire and a flexible protective tube used for protectingthe data transmission wire, wherein the data transmission wire is located in the flexible protective tube; and the receiving unit comprises the data receiver, wherein the data receiver is provided with a plurality of transmission channels. According to the device and the method, technical support can be provided for supporting design of the roadway, gob-side entry retaining, rock covering controland the like.

The invention provides a tear-resistant packing material structure manufacture method and a tear-resistant product. The tear-resistant packing material structure manufacture method comprises a first material preparing step, wherein the first material preparing step comprises a warp and weft direction fiber bundle weaving step and a first press fit step; a second material preparing step, wherein the second material preparing step comprises a second press fit step and a first coating step; a third press fit step; a second coating step; a fourth press fit step; a third coating step and a drying step; and therefore, the tear-resistant packing material structure which is provided with a heat-sealing layer, a transition layer, a film-similar tear-resistant layer, a junction layer and a paper layer in sequence from bottom to top. The tear-resistant packing material structure manufacture method can be realized by automated mechanical equipment, so that the production efficiency can be improved, and the manpower cost is lowered. The tear-resistant packing material structure provided by the invention has printability and deflection owned by the paper layer and also has the effects of bearing capacity, high strength, high toughness and the like of the tear-resistant layer.

The invention relates to goaf gas detection equipment and a gas extraction device thereof. The gas extraction device comprises a far-end sampling gas extraction pipe. A gas extraction end head is arranged at an air inlet of the far-end sampling gas extraction pipe, and the gas extraction end head comprises an inner protective layer and an outer protective layer, wherein the inner protective layerand the outer protective layer are arranged at intervals inside and outside, and the inner protective layer and the outer protective layer are of cylindrical structures. An inner cavity of the inner protective layer communicates with the air inlet, and a plurality of radial air inlet holes penetrating through the corresponding protective layers in the radial direction are formed in the outer peripheral surfaces of the inner protective layer and the outer protective layer. The gas extraction device is provided with a sampling opening not prone to being covered and blocked by rocks, and goaf gasdetection equipment using the gas extraction device is provided.

The invention relates to a pressure-resistant wear-resistant composite low-temperature-resistant ship shore power cable and belongs to the technical field of cables. The shore power cable of the present invention comprises a main wire core, a ground wire core, a control wire core, a fiber combination unit and a filling core, wherein the main wire core comprises a main wire core conductor, a conductor shielding layer, an insulating layer and an insulating shielding layer; the ground wire core comprises a ground wire core conductor and a semiconducting layer extruded outside the ground wire coreconductor; the fiber combination unit comprises a fiber, a fiber loose sleeve, a fiber inner shield, a fiber outer shield. The main wire core, the ground wire core, the control wire core, a fiber combination unit, and the filling core are twisted together to form a cable, and then the inner sheath is extruded. The inner sheath is provided with a fiber weaving reinforcing layer and an outer sheath. The main wire core further includes a metal shielding layer. The outer sheath is also successively provided with a TPEE pressure-resistant protective layer and a Dyneema wrapping tape. The ship shore power cable of the invention can simultaneously transmit power, control signals and communication signals, realizes high-voltage large-capacity power supply on a ship, and realizes information management.

The invention relates to a non-belt fiber and large-core number single-layer stranding optical cable which belongs to the technical field of communication and solves the technical problems of unreasonable structural design and the like in the prior art. The optical cable comprises a center reinforcing piece and a plurality of optical fiber beams. The periphery of each optical fiber beam is respectively sleeved with a loosening sleeve pipe, and fiber paste is arranged in the loosening sleeve pipe. The periphery of the center reinforcing piece is provided with a pad layer. The loosening sleeve pipe carries out single-layer stranding around the center reinforcing piece. The periphery of the stranded loosening sleeve pipe is provided with metal compound belts for coating the loosening sleeve pipes. The periphery of the metal compound belt is coated with a sheath. The invention has the advantages that as the single-layer stranding method is adopted, the production process is simple, the investment of the production equipment is low, and the traditional equipment can be used for producing by arranging a coating color ring device on a tinting machine; the optical fiber is simple to separate, has good containing property, and can contain 288 cores at most; the weatherproof property is good, the high-temperature and low-temperature properties are good, and the optical cable has the functions of moisture prevention, tension resistance, side pressure resistance, shock resistance and the like, and can be used in direct burying, overhead and pipeline laying.

The invention discloses an optical fiber and control core composite type cable for wind power generation. The optical fiber and control core composite type cable for the wind power generation comprises a cable core, a packing layer is arranged in a gap position of the cable core, an inner protective sleeve wraps the outer portion of the cable core in a pressing mode, high-strength aramid yarns are woven outside the inner protective sleeve, and an outer protective sleeve wraps the outmost layer of the cable core. The cable core is composed of an optical fiber unit which is placed in the center of the cable core, four electric power transmission line cores and four control cable cores in a twisting mode. The optical fiber and control core composite type cable for the wind power generation is mainly used in a wind power generator tower and used for controlling electric power transmission of a generator, signal transmission of the generator and devices. The optical fiber and control core composite type cable for the wind power generation not only integrates electric power transmission, signal transmission and circuit control, but also has low temperature resistance, distortion resistance, cracking resistance, and a strong tensile property.

The invention relates to an imitated nylon differential fiber of dyeable polypropylene fiber for dyeing, which comprises: 80 to 90 percent of polypropylene, 9 to 11 percent of dyeable master batch, 0.3 to 0.7 percent of cooling auxiliary agent and 4.0 to 5.0 percent of polyethylene. The fiber has the advantages that: firstly, the polypropylene fiber has the flexibility, tensile property and elasticity as nylon through modifying the polypropylene fiber; and secondly, the dyeability of the modified polypropylene fiber is realized.

The invention provides a semi-hard low-temperature resistant PVC cable material. The semi-hard low-temperature resistant PVC cable material is prepared from the following components in parts by weight: 100 parts of a PVC resin, 0-10 parts of dioctyl phthalate, 1-30 parts of terpolymer, 0-30 parts of calcium carbonate, 0.1-0.2 part of polyethylene wax, 0.1-0.2 part of stearic acid, 2-5 parts of a calcium-zinc composite stabilizer and 0.01-1 part of high-density oxidized polyethylene wax. The invention further provides a preparation method of the semi-hard low-temperature resistant PVC cable material. The preparation method of the semi-hard low-temperature resistant PVC cable material comprises the following steps that S1, each raw material is weighed according to the weight value of the formula, and the raw materials are added into a high-speed mixer for mixing and plasticizing; S2, the mixture is transferred to a double-screw extruder for extrusion processing, and extruding and granulating are carried out through a single-screw extrusion granulator; and S3, air-cooled conveying and packaging is carried out. The semi-hard low-temperature resistant PVC cable material can be used formanufacturing wire and cable sheathing layers and insulating layers with high product flexibility requirements, such as wind energy cables, photoelectric composite cables, elevator cables, and built-in wires of refrigeration equipment, and has good low-temperature resistance and high hardness.

The invention discloses an anti-cracking type high-flame-retardance low-smoke halogen-free material for an optical cable. The high-flame-retardance low-smoke halogen-free material is prepared from thefollowing ingredients in parts by weight: 18 to 20 parts of EVA resin, 3 to 5 parts of POE resin, 12 to 15 parts of metallocene catalysis linear low-density polyethylene, 5 to 7 parts of maleic anhydride grafted polyethylene, 0.3 to 0.5 part of antioxidants, 30 to 50 parts of magnesium calcium carbonate, 5 to 8 parts of char-forming agents and 0.5 to 1 part of organosilicone flame retardants. Theanti-cracking type high-flame-retardance low-smoke halogen-free material for the optical cable as well as a preparation method and application thereof have the advantages that the optical cable can be used in outdoor environment; the external package is thick; some mechanical characteristics and environment characteristics such as pressure resistance, corrosion resistance and tensile performanceare realized; the mechanical performance and the flame retardant performance of the product can be simultaneously improved.

The invention discloses a temperature-resistant computer cable, and relates to the technical field of structures of cables. A flame-retardant warping tape is arranged outside two wire cores, a tinned copper wire braided total shielding layer is arranged outside the flame-retardant warping tape, a thin flame-retardant PVC (polyvinyl chloride) inner sheath is arranged on the outside of the tinned copper wire braided total shielding layer, a galvanized steel strip armor layer is arranged on the outside of the thin flame-retardant PVC inner sheath, and a silicon rubber outer sheath is arranged on the outside of the galvanized steel strip armor layer. The temperature-resistant computer cable has the advantages of high flame retardance, interference resistance, tensile strength, transmission rate and safety coefficient, high-temperature resistance and the like, and silicon rubber insulating layers and the sheaths are arranged inside the cable, so that the temperature-resistant computer cable is good in insulating performance and stability and high in high-temperature resistance and low-temperature resistance.

The invention discloses a cable for an ocean platform. The structure of the cable is as follows: the innermost layer is a conductor, the conductor is formed by twisting a plurality of copper single wires, a polytetrafluoroethylene layer is arranged outside the conductor, a polypropylene film layer is arranged outside the polytetrafluoroethylene layer; the polypropylene film layer is externally provided with a water-blocking yarn layer, the water-blocking yarn layer is externally provided with a water-soluble film layer, the water-soluble film layer is externally provided with a dyeing layer, the dyeing layer is externally provided with a high-density polyethylene film layer, the high-density polyethylene film layer is externally provided with a ceramic fiber layer, and the ceramic fiber layer is externally provided with a polyurethane outer sheath layer. Through structural design and material combination, the cable is tensile and corrosion-resistant, and has the characteristic that a damaged part is easy to check and find.