35results about How to "Stable electrical insulation" patented technology

The invention provides an epoxy resin composite insulating material and a preparation method thereof. The epoxy resin composite insulating material is formed by preparing microcapsules, a ruthenium carbene complex catalyst, and a component including at least a bisphenol A type epoxy resin, a first curing agent, a curing accelerator, and a toughening agent. The microcapsules are formed by preparinga urea-formaldehyde resin performed polymer composition and a core material composition in the presence of a second curing agent and a modifier, the urea-formaldehyde resin performed polymer composition is formed by stirring and heating urea, formaldehyde and deionized water under alkaline conditions, and the core material composition is formed by stirring an emulsifier, dicyclopentadiene and deionized water under heating condition. The epoxy resin composite insulating material has the ability to self-repair when damaged.

The invention provides a manufacturing method of an epoxy glass-cloth-matrix copper clad laminate. The manufacturing method comprises the following steps: 1) preparing a glue solution; 2) getting a roll of alkali-free glass fiber cloth, opening the roll, and immersing the roll into the glue solution by passing the roll through a glue container at a speed of 70-80 m/min; 3) sending the roll to a drying chamber for drying to obtain a prepreg; 4) cutting the dried base board into pieces, laminating 8 pieces of the base board into one group, covering two surfaces of the plurality of laminated base boards with copper foil, putting a layer of a release film on the bottom of the plurality of laminated base boards, and putting the obtained product between two stainless steel plates; and 5) putting the obtained product into a laminating machine for heating and pressurization, taking the obtained product out, and performing cutting and checking to obtain a finished product of the epoxy glass-cloth-matrix copper clad laminate. According to the method, a special-prepared brominated bisphenol A epoxy resin is mixed with a plurality of preparations to form the glue solution, and manufacturing processes and manufacturing conditions are optimized and combined to obtain the copper clad laminate with high-temperature resistance and good flame resistance.

The invention relates to a salt corrosion resistant and twisting resistant power cable for ocean wind power and a manufacturing method of the power cable. A stranded copper conductor is uniformly wrapped in a salt corrosion resistant and twisting resistant extruded rubber insulation layer to form a power cable insulated core; a plurality of power cable insulated cores are mutually stranded to form a power cable core; the power cable core is wrapped in a low-strength non-woven fabric longitudinal wrap on the periphery; and the low-strength non-woven fabric longitudinal wrap is wrapped in an extruded sheath. The power cable provided by the invention adopts the low-strength non-woven fabric longitudinal wrap which completely fits the power cable insulated cores in shape, so that gaps between the low-strength non-woven fabric longitudinal wrap and the power cable insulated cores are eliminated, convenience is provided for stopping flame from spreading inwards under a combustion condition and the resistance to moisture impregnation is enhanced; and meanwhile, the low-strength non-woven fabric longitudinal wrap can ensure that the sheath is not stuck to the insulated cores, and provides convenience for stripping the sheath in a construction process without damaging the insulated cores.

The invention discloses salt corrosion resistance twisted cable insulation rubber used for ocean wind power and a preparation method of the salt corrosion resistance twisted cable insulation rubber. By weight, raw materials comprise 8 parts of Keltan5508, 12 parts of DutralTER4044, 5-7 parts of EP-20, 0.5-0.7 part of DCP, 0.3-0.5 part of TAC, 0.2-0.4 part of HVA-2, 0.2-0.4 part of RD, 0.2-0.4 part of MB, 0.2-0.4 part of KH-550, 2.1-2.5 part of hydration zinc borate, 1-1.5 parts of antimony trioxide, 25-40 parts of aluminum hydroxide, 0.8-1.2 part of red lead, 0.5-1 part of stearic acid, 1.5-2 parts of nan-zinc oxide, 2-5 parts of paraffin oil Sunpar2280, 0.5-1 part of chlorinated paraffin-52, and 1-3 parts of hydration silicon dioxide. According to the method, firstly, the EPDM rubber Keltan5508, the DutralTER4044 and the EP-20 are mixed for 1-1.5 minutes, and then other components except for a vulcanizing agent and a co-vulcanization agent are added. After mixing is carried out for 7-8 minutes, discharging and airing are carried out for more than 24 hours. Then the rubber materials are mixed for 2-3 minutes, the vulcanizing agent and the co-vulcanization agent are added at the last 20 seconds, and the mixed materials are loaded on an open mill for milling, triangular injection molding and square injection molding and then sheeted. The insulation rubber is good in mechanical performance, anti-corrosion performance and anti-aging performance and long in service life.

The invention relates to a salt corrosion-resistant and torsion-resistant integral shielding telecommunication cable for offshore wind power and a manufacturing method of the integral shielding telecommunication cable. Salt corrosion-resistant and torsion-resistant rubber insulating layers are uniformly extruded on the peripheries of stranded copper conductors in a wrapping way to form insulated wire cores; the insulated wire cores are stranded in pair to form pair-twist wire pairs; gaps of the pair-twist wire pairs are filled with flame-retardant non-absorbent fiber fillers; a plurality of groups of pair-twist wire pairs are stranded to form a cable core; and the periphery of the cable core is coated with a low-intensity non-woven fabric longitudinally-covered layer, an inner jacket, a copper foil polyester composite belt shielding layer and an outer jacket sequentially from the inside out. The integral shielding telecommunication cable disclosed by the invention adopts the low-intensity non-woven fabric longitudinally-covered layer of which the shape is completely in fit with that of each insulated wire core, so that gaps between the low-intensity non-woven fabric longitudinally-covered layer and the insulated wire cores are eliminated, flame can be conveniently prevented from being spread and transferred inwards under the burning condition, and resistance to impregnation of humidity can be enhanced; and meanwhile, the low-intensity non-woven fabric longitudinally-covered layer can ensure that the inner jacket and the insulated wire cores are not adhered, so that the insulated wire cores are not damaged when the inner jacket is stripped during construction.

The invention relates to a salt corrosion resistant and twisting resistant control cable for ocean wind power and a manufacturing method of the control cable. A stranded copper conductor is uniformly wrapped in a salt corrosion resistant and twisting resistant extruded rubber insulation layer to form a control cable insulated core; a plurality of control cable insulated cores are mutually stranded to form a control cable core; the control cable core is wrapped in a low-strength non-woven fabric longitudinal wrap; and the low-strength non-woven fabric longitudinal wrap is wrapped in an extruded sheath. The control cable provided by the invention adopts the low-strength non-woven fabric longitudinal wrap which completely fits the control cable insulated cores in shape, so that gaps between the low-strength non-woven fabric longitudinal wrap and the control cable insulated cores are eliminated, convenience is provided for stopping flame from spreading inwards under a combustion condition and the resistance to moisture impregnation is enhanced; and meanwhile, the low-strength non-woven fabric longitudinal wrap can ensure that the sheath is not stuck to the insulated cores, and provides convenience for stripping the sheath in a construction process without damaging the insulated cores.

The invention discloses a high-temperature submersible electric pump cable of which armor layer is prepared from the mixed glue using EPDM as base material. The formula is reasonable and the cable is convenient to use, thus the cable is an ideal armor layer substitute of the cable.

The invention discloses a high-thermal conductivity epoxy resin-based boron nitride nano-tube composite insulating material prepared by electric field regulation. An electric field is applied in the curing process of the material, and the oriented and orderly arrangement of a thermal conduction filler in the composite material is realized by electric field regulation. The material has an excellentthermal conductivity, can meet heat dissipation requirements of power components, has a stable electrical insulating performance, and can ensure the lasting and safe running of electrical and electronic equipment. A preparation method of the material has the advantages of simple processing process and good universality, and allows the high-thermal conductivity epoxy resin-based boron nitride nano-tube composite insulating material to be easily prepared.

The invention relates to the technical field of materials for cables, in particular to an insulated and flame-retardant cable. Raw materials of an insulating layer comprise 100 parts of an ethylene-methacrylic acid copolymer, 20-30 parts of polyamide resin, 60-80 parts of hyperbranched polyether modified melamine and 1-10 parts of an auxiliary. According to the insulated and flame-retardant cable, halogen-containing polyvinyl chloride and other halogen-containing base materials are not required to be added, and a better flame retardant effect can be realized; under the synergistic effect of all components, the water absorbency of the insulating material is reduced, the high flame retardant effect is realized, meanwhile, the high electric insulation effect is realized, and the insulating material still has better electric insulation stability under the wet condition; the problems that mixing is difficult, the extrusion pressure is high and the like in the processing process are solved, the production process is simplified, the requirements for equipment are reduced, the production cost is reduced, and the purpose of industrial production is achieved.

The invention provides a 220kV epoxy type insulating copper casing and belongs to the field of electrical techniques. The 220kV epoxy type insulating copper casing comprises a left copper tube, a right copper tube, an epoxy insulating part, a left insulating layer and a right insulating layer, wherein the left copper tube comprises a first large copper tube body and a first small copper tube body, a left copper sleeve flange is mounted on the first large copper tube body in a sealed manner, and a left wiring end close to the first small copper tube body is arrangd on one side of the first large copper tube body; the right copper tube comprises a second large copper tube body and a second small copper tube body, a right copper sleeve flange is mounted on the second large copper tube body in a sealed manner, a right wiring end close to the second small copper tube is arranged on one side of the second large copper tube body, and the right wiring end and the left wiring end are arranged on the same side; the epoxy insulating part is annularly arranged, molded by casting an epoxy resin material and arranged between the left copper sleeve flange and the right copper sleeve flange, and the epoxy insulating part, the left copper sleeve flange and the right copper sleeve flange are connected in a sealed manner; the left insulating layer and the right insulating layer are made from an epoxy resin composite composed of specific components. The 220kV epoxy type insulating copper casing is reasonable in design and has stable electrical insulation performance, high comprehensive performance and long service life.

The invention relates to a salt corrosion-resistant and torsion-resistant telecommunication cable for offshore wind power and a manufacturing method of the telecommunication cable. Salt corrosion-resistant and torsion-resistant rubber insulating layers are uniformly extruded on the peripheries of stranded copper conductors in a wrapping way to form insulated wire cores; the insulated wire cores are stranded in pair to form pair-twist wire pairs; gaps of the pair-twist wire pairs are filled with flame-retardant non-absorbent fiber fillers; pair-twist wire pairs adopt different stranding pitches, a plurality of groups of pair-twist wire pairs are stranded to form a cable core; the periphery of the cable core is coated with a low-intensity non-woven fabric longitudinally-covered layer; and a jacket is extruded on the periphery of the low-intensity non-woven fabric longitudinally-covered layer in a wrapping way. The telecommunication cable disclosed by the invention adopts the low-intensity non-woven fabric longitudinally-covered layer of which the shape is completely in fit with that of each insulated wire core, so that gaps between the low-intensity non-woven fabric longitudinally-covered layer and the insulated wire cores are eliminated, flame can be conveniently prevented from being spread and transferred inwards under the burning condition, and resistance to impregnation of humidity can be enhanced; and meanwhile, the low-intensity non-woven fabric longitudinally-covered layer can ensure that the jacket and the insulated wire cores are not adhered, so that the insulated wire cores are not damaged when the jacket is stripped during construction.

The invention relates to a salt corrosion-resistant and torsion-resistant composite cable and a manufacturing method thereof. A power cable insulation layer, a control cable insulation layer and an instrument cable insulation layer are salt corrosion-resistant and torsion-resistant rubber insulation layers. A power cable core, a control cable core and an instrument cable core are twisted into a composite core. The periphery of the composite core is coated with a low-intensity non-woven longitudinal cladding. A sheath is arranged at the periphery of the low-intensity non-woven longitudinal cladding by means of extrusion. The low-intensity non-woven longitudinal cladding which has a shape completely consistent with the appearance of an insulated wire core is adopted, and the gap between the low-intensity non-woven longitudinal cladding and the insulated wire core is eliminated, so that flame can be prevented from spreading to the inside under the condition of combustion, and the resistance to moisture impregnation can be enhanced. Moreover, the low-intensity non-woven longitudinal cladding can ensure that the sheath and the insulated wire core are not adhered together, and the insulated wire core is not damaged when the sheath is tripped in the process of construction.

The invention relates to a salt corrosion resistant and twisting resistant double-shielded communication cable for ocean wind power and a manufacturing method of the communication cable. Each stranded copper conductor is wrapped in a salt corrosion resistant and twisting resistant extruded rubber insulation layer to form an insulated core; each two insulated cores are stranded to form a twisted pair of which the gaps are filled with fillers; each twisted pair is wrapped in a twisted pair copper foil shielding layer to form a twisted-pair group; the twisted-pair groups are mutually stranded to form a cable core; and the cable core is wrapped in a low-strength non-woven fabric longitudinal wrap, an inner sheath, a cable core copper foil shielding layer and an outer sheath in sequence from inside to outside. The communication cable provided by the invention adopts the low-strength non-woven fabric longitudinal wrap which completely fits the insulated cores in shape, so that gaps between the low-strength non-woven fabric longitudinal wrap and the insulated cores are eliminated, convenience is provided for stopping flame from spreading inwards under a combustion condition and the resistance to moisture impregnation is enhanced; and meanwhile, the low-strength non-woven fabric longitudinal wrap can ensure that the sheaths are not stuck to the insulated cores, and provides convenience for stripping the sheathes in a construction process without damaging the insulated cores.