40results about How to "Reduce laying space" patented technology

The invention discloses a five-core compound flat cable with control core pairs. The cable is of a flat structure. Three phase cores are directly trailed in parallel at the center of the cable; a gird is wrapped outside the phase cores; a plurality of earth wire cores, neutral cores and at least one pair of control core pairs are arranged in parallel outside the gird; an outer sheath is extruded on the outermost layer of the cable. The cable is small in signal interference, can be used for transmitting electric power and control signals simultaneously, can be repeatedly moved, bent and vertically used, is compact in structure, small in external diameter, easy to process and convenient in construction.

The invention relates to a thin-wall crosslink low smoke cable for ships communication or control signal and a preparation method thereof. The cable structure is that the outer layer of a multi-strand conductor is an insulating layer, the outer layer of the insulating layer is a shielding layer, the outer layer of the shielding layer is a lapped covering, the outer layer of the lapped covering isarmor, and the outer layer of the armor is a sheathed layer. The preparation method is as follows: a line-cable stranding machine strands tin plated copper wire as a conductor; an extruder is utilized to manufacture the insulating layer outside the conductor, the insulating layer is subjected to irradiation and crosslinking by an electron accelerator; a cable former is ustilized to strand insulated wires together; the shielding layer and the armor are braided by utilizing a braiding machine; and the sheathed layer is manufactured by the extruder, and the sheathed layer is subjected to irradiation and crosslinking by the electron accelerator. The thin-wall crosslink low smoke cable has the advantages of small outside diameter, light weight, ageing resistance, tear resistance, heat oil resistance, high flame retardancy, low smoke, no halogen, low toxicity and good ability of keeping excellent electrical performance and mechanical property in hostile environment, wherein the weight of the thin-wall crosslink low smoke cable is 30%-45% lighter than that of common cables.

The invention discloses a direct-current power and control composite cable for rail transit, and relates to the field of cables. The composite cable comprises a power cable core and at least one control cable core, and the control cable cores are arrayed outside the power cable core in a surrounding mode; the power cable core comprises a first conductor formed by multiple stranded copper wires, wherein the first conductor is wrapped by a first insulating layer; each control cable core comprises two control core wires stranded in pairs, and each control core wire comprises a second conductor formed by stranding multiple copper wires, wherein the second conductor is wrapped by a second insulating layer. The power cable and the control cables are effectively combined, laying investment and material production cost are reduced, and laying space is reduced; the power cable and the control cables do not disturb each other, and safety of system operation is ensured; the composite cable has the advantages of being fireproof, large in carrying capacity, resistant to impact voltage and mechanical damage, free of halogen or toxicity, anti-explosion, waterproof, resistant to corrosion, long in service life, safe, structurally flexible and resistant to mechanical vibration, overloads and high temperature.

The invention relates to an intelligent mineral medium-voltage fireproof self-monitoring cable. The intelligent mineral medium-voltage fireproof self-monitoring cable comprises insulated phase wire cores, optical fiber units, a filling layer, a wrapped fireproof layer, a protective layer and an outer sheath; there are the plurality of insulated phase wire cores, the filling layer fills between theedge gaps of the insulated phase wire cores, the wrapped fireproof layer is wrapped at the outer portion of the filling layer, the protective layer is wrapped at the outer portion of the wrapped fireproof layer, the outer sheath is wrapped at the outer portion of the protective layer, and the optical fiber units are distributed at the middle slit after the insulated phase wire cores are strandedand the outer gaps between the adjacent insulated phase wire cores. Compared to the prior art, the cable achieves that the medium-voltage cable can be still used in the fire, the gases and smoke generated in the fire are non-toxic and non-polluting to increase the fire protection rescue time and intelligent monitoring requirements after the fire to guarantee the personal safety, reduce the property loss and reduce the cost of cable maintenance of cable fault position determination.

The invention relates to the technical field of the coaxial cable, especially ex-core nuclear measurement equipment nuclear-grade four-coaxial cable. The ex-core nuclear measurement equipment nuclear-grade four-coaxial cable comprises a conductor; an inner insulating layer is wrapped at the outside of the conductor, an outer insulating layer is wrapped at the outside of the inner insulating layer,an isolation layer one is wrapped at the outside of the outer insulating layer, an inner shield layer is wrapped at the outside of the isolation layer one, the isolation layer two is wrapped at the outside of the inner shield layer, an inner jacket one is warped at the outside of the isolation layer two, an outer shield layer is wrapped at outside of the inner jacket one; an inner jacket two is wrapped at the inside of the outer shield layer, a corrugated pipe is wrapped at the outside of the inner jacket two, and the outer jacket is wrapped at the outside of the corrugated pipe. The ex-corenuclear measurement equipment nuclear-grade four-coaxial cable disclosed by the invention is stable in structure, good in sealing and reliability, capable of saving the laying space, the coaxial detection parameter of the national nuclear power station pile type can be effectively matched, the problems that the national coaxial cable cannot tolerate the LOCA and the service cannot exceed 60 yearsare solved at the same time.

The invention discloses a compact four-core ribbon cable which is of a flat structure. The center of the cable is provided with three parallel phase cable cores. A plurality of ground cable core conductors are distributed outside the phase cable cores in parallel. Wrapping tape wraps the ground cable conductors. Protecting sleeves wrap the wrapping tape in an extruding mode. The compact four-core ribbon cable has the advantages of being capable of being moved repeatedly, bent and vertically used, compact in structure, small in outer diameter, easy to process, convenient to construct and the like.

The invention relates to a bending-insensitive single mode with small outer diameter and low attenuation, which includes a core layer, a cladding layer and a resin coating layer, and is characterized in that the core layer diameter a is 6.5-6.8 μm, Δn1 is 0.30%-0.34%, Inner cladding diameter b is 17-23 μm, Δn2 is -0.1% to -0.05%, sunken cladding diameter c is 42-50 μm, Δn3 is -0.4% to -0.2%, outer cladding diameter d1 is 123-125 μm, outer cladding It is a pure silica glass layer, and the outer cladding is coated with a resin coating layer, including an inner coating layer and an outer coating layer. The diameter d2 of the inner coating layer is 150-160 μm, and the diameter d3 of the outer coating layer is 175-185 μm . The optical fiber can have low attenuation and good bending performance at the same time. The optimized design of the depressed cladding profile improves the macrobending performance of the optical fiber to ensure the low temperature performance of the optical fiber after being cabled under the premise of reducing the coating diameter.

The invention relates to a towline cable and a manufacturing process thereof. The towline cable structurally comprises a conductor, an insulator, a tensile core, an inner sheath and an outer sheath. The radiation ethylene propylene rubber insulator is arranged on the periphery of the conductor, the low temperature resistant elastic body inner sheath is arranged on the periphery of the radiation ethylene propylene rubber insulator, and the flexible polyurethane outer sheath is arranged on the periphery of the inner sheath. The manufacturing process is that a tinned copper wire is stranded by a wire cable stranding machine to server as the conductor, an extruder device is utilized to extrude the environment-friendly radiation ethylene propylene rubber insulator on the outside of the conductor, the stranding machine is utilized to strand high-strength tensile fibers, flexible polyvinyl chloride (PVC) is extruded by the extruder device on the outer layer to serve as the tensile core, then a cabling machine is utilized to strand an insulation wire core and the tensile core together, and the extruder device is utilized to extrude low temperature elastic body sheath materials to serve as the sheaths. The cable has the advantages of high mechanical strength, flexibility, high abrasion resistance, aging resistance, cracking resistance, mould resistance, moisture resistance and acid-base corrosion resistance, is flexible under the low temperature condition and suitable for special environments such as weapons, electronics, high-level civil use.

The invention discloses a flat four-core composite mineral fire-proof control cable comprising an insulated cable core and a control cable core that are arranged in parallel. Three insulating wire cores are arranged in parallel at the center of the insulated cable core; a plurality of ground wire core conductors are distributed in parallel at the peripheries of the three insulating wire cores; andthe outsides of the ground wire core conductors and the three insulating wire cores are extruded by an inner inorganic mineral metal sheath. A plurality of control wire cores are twisted and then aninner inorganic mineral metal sheath extrudes the outsides of the plurality of control wire cores to form the control cable core. The gap between the insulated cable core and the control cable core isfilled with glass fiber filaments. The outsides of the insulated cable core and the control cable core are extruded by an outer flat inorganic mineral metal sheath. The cable having advantages of compact structure, small outer diameter, and reduced occupied space can be moved repeatedly, be bent, and be used vertically and is also easy to process and convenient to construct.

The invention discloses a GWIB (general way interface bus) high-temperature-resistant cable and a preparation process thereof. The GWIB high-temperature-resistant cable and the preparation process thereof are characterized in that a nickel-clad copper alloy line conductor is twisted by a cable wire twisting machine, inner insulating layers of two polyimide composite belts (PTFE(polyterafluoroethylene) / PI(polyimide) / PTFE(polyterafluoroethylene)) which are lapped by a lapping machine are arranged on the periphery of the nickel-clad copper alloy line conductor, a high-temperature-resistant alkali-free glass fiber outer insulating layer which is woven by a weaving machine is disposed on the periphery of each inner insulating layer, a lapping layer which is lapped by a mica tape is disposed onthe periphery of each outer insulating layer, and a high-temperature-resistant alkali-free glass fiber woven protecting layer which is woven by the weaving machine is arranged on the periphery of each lapping layer. The GWIB high-temperature-resistant cable and the preparation process thereof have the advantages that lapping and sintering process is adopted to realize insulation, combined insulation is adopted, the cable has excellent electric performances, mechanical performances and environmental resistance, is resistant to high temperature of 400 DEG C, is high-temperature-resistant, low-temperature-resistant, mould-resistant, salt-air-resistant, moist-heat-resistant and flexible, and is small in outer diameter and light in weight, and the like.