181results about How to "Easy to install and lay" patented technology

The invention discloses a medium-voltage fire-resistant cable which comprises at least one conductor (1), wherein the exterior of the conductor (1) is provided with a conductor shielding layer (2), an insulating layer (3), an insulation shielding layer (4), a metal shielding layer (6), a fire-resistant layer (8), an oxygen-and-thermal barrier layer (9) and an outer sheath (10) in sequence, wherein the fire-resistant layer (8) is a ceramic silicon rubber layer; and when the number of the conductor (1) is three, a flame-retardant asbest rope packing layer (5) is arranged between the metal shielding layer (6) and the fire-resistant layer (8), and the exterior of the flame-retardant asbest rope packing layer (5) is provided with a non-alkaline glassfibre belting cabling winding layer (7). In the technical scheme of the invention, a hard ceramic armor can be formed by virtue of high-temperature burning and a protection line can be kept unblocked, the longer the burning time is, the harder the ceramic armor is, the ceramic armor has good insulating property and can fully ensure the cable to be fire-resistant and voltage-resistant; and meanwhile, the medium-voltage fire-resistant cable has low cost, is easy to install and lay and is convenient to use.

The invention provides a riverbed base vegetation type ecological blanket repair method. The method comprises the steps of: preparing vegetation ground substance by mixing sand and stones, raw soil, substrate sludge, water-retaining agents and water by proportion; uniformly adding aquatic plant seeds or interplanting aquatic plant branches in the vegetation ground substance; covering the vegetation ground substance by nonwoven fabric, and forming a blanket by a pressing machine and a forming machine; and covering a layer of nylon mesh outside to form the vegetation type ecological blanket. When in use, the vegetation type ecological blanket is smoothly laid at riverbed bottom, and bamboo fillers are drilled at the four corners, and the centers of the upper edge and the lower edge of the vegetation type ecological blanket to fix the vegetation type ecological blanket at the riverbed bottom. The invention solves the problems of the difficulty of aquatic plant repair at the riverbed with deeper silt, and the damage to riverbed microecosystem caused by desilting and dredging. Inner source pollution caused by the release of infectant in substrate sludge to water can be effectively restricted, and all of the used materials are environmental friendly. When in use, the vegetation type ecological blanket can be installed and laid conveniently on site, and have low cost and obvious effect.

The invention discloses a cable production process which includes the steps of firstly, single wire drawing; secondly, single wire annealing; thirdly, stranding; fourthly, cabling; fifthly, coating. The production process is reasonable and simple, and the produced cables are resistant to corrosion and oxidation, long in service life, suitable for various severe environments, free of electric leakage and high in safety performance.

Provided is a high-temperature-resistant low-loss compound insulation coaxial cable. The high-temperature-resistant low-loss compound insulation coaxial cable is characterized in that a solid or stranded inner metal conductor (1), a polytetrafluoroethylene micropore compound insulation layer (2), an outer conductor (3) and a sheath layer (4) are arranged from inside to outside in sequence, the solid or stranded inner metal conductor (1) longitudinally extends along the central axis of the cable, the outer conductor (3) is formed by knitting metal or is additionally provided with an inner shielding layer, the sheath layer (4) is made of FEP copolymer or low-smoke halogen-free flame retardant polyolefin, and the inner metal conductor (1) and the outer conductor (3) are separated by the polytetrafluoroethylene micropore compound insulation layer (2); the polytetrafluoroethylene micropore compound insulation layer (2) is made of modified polytetrafluoroethylene organic-inorganic nanocomposites filled with nano polyhedral oligomeric silsesquioxanes (POSS). According to the coaxial cable, the dielectric constant of the insulation layer of the cable is reduced. A traditional solid polytetrafluoroethylene insulation dielectric constant is reduced to 1.2-1.6 from 2.1 and is reduced by about 24 percent to 43 percent, and the signal attenuation of cable high-frequency communication is reduced.

The invention relates to a mining power cable and a production technology thereof. The mining power cable comprises a conductive wire core, a neutral wire core, a tensile nylon rope, a tinned copper wire and steel wire braid layer, a flame retardant fire-resistant layer and a black chloroprene rubber outer sheath, wherein the conductive wire core is formed by coating and twisting a copper conductor with a mineral synthetic mica tape; a polytetrafluoroethylene insulating layer coats the surface of the conductive wire core; the neutral wire core comprises a twisted copper conductor and a glass fiber core; the twisted copper conductor extrudes and wraps the glass fiber core; the polytetrafluoroethylene insulating layer coats the surface of the neutral wire core; the outer sides of the conductive wire core and the neutral wire core are sequentially coated with the tensile nylon rope and the tinned copper wire and steel wire braid layer and then extruded and wrapped into a cable core; and the surface of the cable core is extruded and wrapped with the flame retardant fire-resistant layer and the black chloroprene rubber outer sheath from the inside to the outside. The mining power cable is simple in structural design, low in smoke, free of halogen, fire-resistant, convenient to install and lay, good in flexibility and good in safety performance; and internal and external electromagnetic interference is effectively suppressed.

The invention discloses a cable production technology. The cable production technology includes the following steps of 1), monofilament drawing; 2), monofilament annealing; 3), stranding; 4), cabling; 5), wrapping. The cable production technology is reasonable and concise, cables are corrosion resistant, antioxidant, long in service life and applicable to various severe environments, electric leakage never occurs, and safety performance is high.

The invention relates to a fiber cement-stone compound plate and a product thereof. The product comprises a panel 1 and a cement-containing base material plate 3, and the compound plate is formed by bonding through a bonding layer 2 constituted by polyacrylic ester-modified cement slurry and performing pressure forming, wherein the preparation of the base material plate 3 is as follows: sequentially injecting materials of various layers into a mold frame for respectively forming a bottom layer, a lower interlayer, a middle layer, an upper interlayer and a surface layer, wherein the bottom layer and the surface layer are made of modified cement, the upper and the lower interlayers are of glass fiber nets, the components of the middle layer comprise cement, light ceramsite, fiber and polyacrylic ester emulsion or the middle layer is made of foam cement mortar with gas content of 20%-50%; and the thickness of the base material plate 3 is 12mm-16mm, and the base material plate is further bonded with the panel made of stone for forming the compound plate. The product is high in bending strength and flexural strength, low in thermal expansion coefficient and hygroscopic expansion coefficient, heat-insulating, weather-resistant, simple and convenient to mount and suitable for various floors.

The invention discloses an optical cable for rail transit, belonging to the technical field of optical cables. An optical fiber is straightly placed in a loose sleeve, and fiber paste is filled between the loose sleeve and the optical fiber to combine an optical fiber core. The cross section of a framework is of a cross-shaped structure, the cross-shaped structure of the framework is used for partitioning the periphery of the framework into four spaces, the framework is made of compound carbon fiber, one to three optical fiber cores are respectively arranged in each space around the framework, a water-blocking wire and cable paste are filled between the optical fiber cores and in a gap between the optical fiber cores and the framework, and are wound and coated by using a bundling yarn to form an optical cable core which is then sequentially coated with an aluminum-plastic composite belt layer and an outer sheath to form the optical cable for the rail transit. According to the optical cable, by using the framework made of the carbon fiber, the tension strength of the optical cable and the space in the framework are ensured, the self weight of the optical cable is reduced, so that the performance of the optical fiber in the loose sleeve is not influenced, and thus the optical cable is conveniently laid and installed; the defect that a thunder is easily introduced into a room by a metal reinforcer optical cable is eliminated, and the optical cable is suitable for a communication system of the rail transit.

The invention, which belongs to a cable manufacturing technology field, relates to a manufacturing technology of a long-length jointless mineral insulation cable. The above technology comprises the following steps that: (1) 12-16% H2SO4 and tap water are successively used to clean a copper strip through a cleaning machine, the cleaned copper strip is dried at a temperature of 35-45 DEG C, and then the dried copper strip enters into a moulding roller so as to perform pipe forming; a tension force alignment copper rod flows into a stainless steel set core pipe and a special magnesium oxide powder is filled while the copper rod is entering into the stainless steel set core pipe, and silicone oil is injected into the special magnesium oxide powder in the set core pipe; (2) argon arc welding continuous welding is performed to the pipe moulding copper strip, and then continuous cycle rolling and annealing are performed. A production period is short. Product manufacturing cost is low. High-pressure resistant and insulation properties are good. A cable production length is long.

The invention belongs to the technical field of rail traffic, and provides an explosion composite induction plate device for linear motor rails. The device comprises a rail bed, sleepers, a linear motor, an explosion composite induction plate, press seats, fixing bolts and bolt sleeves, wherein the sleepers are laid on the rail bed in a close-packed manner; steel rails are symmetrically arranged on two sides of the sleepers; a locomotive is arranged on the steel rails by virtue of rail wheels, and the linear motor is arranged right under the locomotive; the explosion composite induction plate is arranged right under the linear motor and comprises an upper pure aluminum plate and a lower substrate steel sheet; steel angles are symmetrically connected to the lower side of the explosion composite induction plate, and rib plates are fixed among the steel angles; one side of each steel angle is pressed below the respective press seat; the press seats are fixed on the rail bed by virtue of the fixing bolts and the bolt sleeves; and the bolt sleeves are pre-buried on the rail bed. The device can be used for effectively solving the problems that a composite induction plate is low in binding strength and easily causes operation failure of a linear motor rail vehicle due to the occurrence of delamination splitting.

The invention discloses a cable production process, and relates to the field of machinery and equipment manufacturing. The cable production process comprises the nine steps of drawing, annealing, stranding, coating, brush coating of anti-corrosion materials, forming, filling, and wrapping. According to the cable production process, the mechanical strength, chemical corrosion resistance, humidity resistance, waterproof performance, flame retardancy and the like of the cable are improved.

The invention relates to a low-smoke zero-halogen ceramic fireproof cable material and a preparation method thereof. The low-smoke zero-halogen ceramic fireproof cable material is prepared from the following materials in parts by weight: an ethylene-vinyl acetate copolymer, an ethylene-alpha-olefin copolymer, maleic anhydride-grafted amorphous polyolefin, mica powder, ceramic powder, glass powder, magnesium hydroxide, calcium oxide, zinc oxide, melamine cyanurate, an antioxidant 1010, a silane coupling agent A-172, and lubricant silicone master batch; the ethylene content of the ethylene-vinyl acetate copolymer is 28-40%, and the melt flow rate is 3-5g/10min; the ethylene-alpha-olefin copolymer is a mixture of one or two of an ethylene-alpha-propylene copolymer and an ethylene-alpha-octene copolymer which are mixed according to any ratio by weight; the glass powder is low-melting-point glass powder having the melting point of 500-800 DEG C. The low-smoke zero-halogen ceramic fireproof cable material is porcelainized to change into a hard ceramic protection layer after ignition at high temperature and has certain mechanical strength, thereby ensuring normal operation of a wire and cable line.

The invention discloses a wireless sensory detection device and a wireless sensory detection method for a tunnel environment, relates to a detection device and a detection method for the tunnel environment, and aims at solving the problems that a conventional detection device and a conventional detection method have the disadvantages that an instrument is cumbersome, the mounting is complicated and the cost is high. The wireless sensory detection device for the tunnel environment consists of N wireless sensory transmission nodes and a wireless information collection node. The wireless sensory detection method for the tunnel environment comprises the following steps of: 1, giving a fixed-frequency pumping signal fL to a sensor to begin sweeping a frequency by using a first singlechip processing unit in the wireless sensory transmission nodes; 2, judging whether the sensor generates resonance vibration or not, and if yes, executing a step 4; 3, the sum of the fL and delta, judging that the sum of the fL and the delta is less than fm; 4, sending a detected signal to the wireless information collection node through an electromagnetic wave by using a detection circuit; and 5, receiving information for processing by using the wireless information collection node, and alarming if an environmental parameter is judged to be a dangerous value. The wireless sensory detection device and the wireless sensory detection method are applicable to the detection device and the detection method for the tunnel environment.

The invention discloses a high-performance cable for construction. The high-performance cable for construction solves the problem that the existing cable for construction is low in fire resistance, poor in weather resistance, short in service life and the like. The high-performance cable for construction has the advantages of being environmentally friendly, inflaming retarding, waterproof, moistureproof, strong in antijamming capability, excellent in electric performance, long in service life and the like. The high-performance cable for construction structurally comprises a cable core which is composed of a plurality of insulating wire cores arranged in a filling body, each insulating wire core comprises a conductor and a double-layer co-extrusion heterogeneous insulating layer arranged outside the conductor in a pressing and wrapping mode, and the cable core is sequentially wrapped by a wrapping layer, a cable shielding layer, an oxygen separating layer, an armor layer and a cable outer sheath sequentially from inside to outside.

The invention discloses a special high-hardness anti-tortuous optical cable strengthening core and an optical cable using the strengthening core; the optical cable comprises a sheathed cable body, a strengthening piece and optical fibers; the sheathed cable body made of environmentally friendly halogen-free flame retardant high-elastic polyolefin materials has non-toxic environmentally friendly flame-retardant properties and can be applied to indoor laying; the strengthening piece takes aramid fibers as matrix material which then enters a die hole after being impregnated into the ultra-violet composite liquid, finally the material is extruded, stretched and solidified through UV into 0.5mm rod-shaped matrix, with the tensile force reaching more than 1800MPa; a layer of 0.2mm high-hardness bending-resistant and flame-retardant PVC high-elastic material is arranged on the rod-shaped matrix through plastic coating; the layer of material is integrated into the sheathed cable body in a parallel and symmetrical way; the fibers can be one or more in number, with a diameter of 250um; the fibers are made of easily tortuous and insensitive fiber materials; therefore, through the combination of the processes and technologies, the indoor wiring optical cable with the specification of 2 multiplying 3mm achieves high-hardness and anti-tortuous practical effects.

The invention discloses a spiral strip identification high-temperature resistance flexible electric wire and cable for aviation. With regard to a high-temperature resistance flexible electric wire which is directly formed by a single insulating core wire, spiral strip identification is printed on an insulating layer; with regard to a high-temperature resistance flexible electric cable consisting of a single insulating core wire, a shielding layer and a jacket layer, spiral strip identification is printed on the jacket layer; with regard to a high-temperature resistance flexible electric cable consisting of a plurality of insulating core wires, a shielding layer and a jacket layer, spiral strip identification is printed on an insulating layer and/or the jacket layer; with regard to a high-temperature resistance flexible electric cable consisting of a plurality of insulating core wires and a jacket layer, spiral strip identification is printed on an insulating layer and/or the jacket layer; and each insulating core wire consists of a conductor and an insulating layer coating the conductor; each conductor is manufactured by twisting conductor single wires; and the minimum diameter of each conductor single wire is 0.051 mm. The electric wire and cable provided by the invention are easy to distinguish and identify, and have good high-temperature and low-temperature resistance, and radiation resistance, and are softer and easy to lay and mount.

The invention discloses a vitrified silicon rubber insulation fireproof cable which comprises a cable core, wherein the cable core is formed by stranding a plurality of insulation wire cores; a flame resistance filler is filled in a gap in the cable core; an armor layer is extruded on the cable core; and an outer sheath is extruded on the outermost layer. Each insulation wire core consists of a middle conductor and a vitrified silicon rubber insulation layer wrapping the conductor. Large-length and high-specification production is realized; a product is soft and convenient to assemble and lay; the number of middle joints is small; and the performance can completely meet the standard requirement of ore insulation cables.

The invention relates to fireproof cable for a nuclear power station and a preparation method of the fireproof cable, and belongs to the technical field of special cables. The cable includes six layers, namely, a conductive copper core, a special rubber insulated fireproof layer, an inorganic-material anti-radiation layer, a halogen-free flame-retardant polymer inner sheath layer, an armored layer and a halogen-free flame-retardant polymer oversheath layer. The conductive copper core is wrapped in the special rubber insulated fireproof layer, the special rubber insulated fireproof layer is extruded and molded by a rubber extrusion device, an inorganic material wraps the special rubber insulated fireproof layer to form the anti-radiation layer, the halogen-free flame-retardant polymer inner sheath layer wraps the periphery of the anti-radiation layer by extrusion, the steel band armored layer is wrapped, and the halogen-free flame-retardant polymer oversheath layer wraps the armored layer by extrusion. The cable is characterized by high anti-radiation performance, high fireproof and flame-resistant performances, excellent flame-retardant performance and convenient laying.

The invention discloses a Cat5e high-temperature-resistant special cable for aerospace. The cable mainly includes three conductor cable cores, a silver-plated round copper wire braided shielding layer, a crosslinked ethylene copolymer tetrafluoroethylene insulating layer, a silver-plated copper strip armored layer and a chlorosulfonated polyolefin sheath layer. The three conductor cable cores are formed by intertwisting, each conductor cable core is internally provided with two conductor wire cores, the three conductor cable cores are wrapped by the silver-plated round copper wire braided shielding layer, the silver-plated round copper wire braided shielding layer is wrapped by the crosslinked ethylene copolymer tetrafluoroethylene insulating layer, and the crosslinked ethylene copolymer tetrafluoroethylene insulating layer is wrapped by the silver-plated copper strip armored layer. The cable is easy to lay and install, is easy to strip, coat with tin and perform terminal processing, has the advantages of high-low-temperature resistance, corrosion resistance, high flame retardance, light weight, stability and reliability and the like, is suitable for being used in special environment of aerospace, and the cable is crack-resistant and radiation-resistant.

The invention discloses a third rail insulated support of a subway, comprising a base (1), an insulated bracket (2) and an insulated fastener (3), wherein the insulated bracket (2) comprises a cross beam (2.1), a vertical bearing plate (2.2) and a bearing beam (2.4); the vertical bearing plate (2.2) is fixed with the base (1); the cross beam (2.1) is fixed with the top end of the vertical bearing plate (2.2); a lower limiting bearing plate (2.3) is arranged at one end of the cross beam (2.1); the bearing beam (2.4) comprises a bearing cross beam (2.6) and a vertical connecting plate (2.7); the lower end of the vertical connecting plate (2.7) is fixed at one end of the cross beam (2.1); and one end of the bearing cross beam (2.6) extends into a channel of the insulated fastener (3) which is fixed at one end of the bearing cross beam (2.6) through a horizontal screw (4). The third rail insulated support of the subway has favorable stability and firmness and puts an end to the potential safety hazard.