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150results about "Mica" patented technology

High-strength insulator and preparation method thereof

The invention relates to the technical field of insulators, and provides a high-strength insulator and a preparation method thereof.The high-strength insulator is prepared from, by weight, 20-30 parts of aluminum oxide, 10-15 parts of kaolin, 6-10 parts of aluminum nitride, 15-20 parts of mullite, 5-10 parts of mica powder, 3-6 parts of titanium dioxide and 10-15 parts of modified silicon nitride whiskers; the modified silicon nitride whiskers are obtained by modifying silicon nitride whiskers with rare earth oxide. According to the technical scheme, the problem of low insulator strength in the prior art is solved.
Owner:HEBEI HEINIU ELECTRIC POWER FITTINGS CO LTD

Stator bar less-glue insulation whole immersion process

The invention belongs to the technical field of stator processing, and discloses a stator bar less-glue insulation whole immersion process, which comprises the following steps: S1, early-stage preparation; s2, stator bar pretreatment; s3, binding a less-glue mica tape; s4, dipping treatment; s5, curing treatment; s6, cleaning and detecting; the early-stage preparation comprises material selection and equipment inspection and debugging. According to the method, the excellent performance of an insulating layer is guaranteed from the source through the epoxy resin-based solvent-free impregnating varnish with the accurate proportion, secondly, in the link of binding the mica tape with less glue, the binding tightness and uniformity of the mica tape are guaranteed by accurately setting the speed and tension of a numerical control taping machine, the insulation defect caused by poor binding is effectively avoided, and in addition, the service life of the insulating layer is prolonged. Key technical measures such as pressure impregnation, accurate temperature control and pressure maintaining in the impregnation and curing process further promote sufficient permeation of the impregnating varnish and uniform curing of the insulating layer, and the compactness and the electrical performance of the insulating layer are remarkably improved.
Owner:HARBIN ELECTRIC MACHINERY FACTORY (ZHENJIANG) CO LTD

Anti-termite fireproof power cable

The invention relates to the technical field of power cables, and discloses an anti-termite fireproof power cable. The cable sequentially comprises a plurality of conductors, a filling layer, a conductor shielding layer and a mica tape fireproof layer from inside to outside, wherein the conductors are wrapped by insulating layers to form insulating wire cores; the filling layer wraps the insulating wire cores to form a circular cable core; the conductor shielding layer wraps the filling layer; the protective assembly comprises a protective layer spirally wound outside the fireproof layer and an expansion strip embedded in the protective layer, a buffer layer wrapping the protective assembly, a steel tape armoring layer wrapping the buffer layer and an outer sheath wrapping the steel tape armoring layer; the protective layer is formed by spirally connecting a plurality of fan-shaped retainers in the axial direction, the retainers are provided with grooves for containing the expansion strips, the outer walls of the retainers are provided with guide strips matched with the guide grooves to achieve stable connection, the expansion strips are heated to expand to fill gaps and insulate heat in a fire disaster, and the fireproof layer maintains insulation. The protection layer, the steel tape armoring and the outer sheath cooperate to achieve termite prevention and stable structure, and the operation safety and reliability of the cable are guaranteed.
Owner:RUIYANG GRP NORTHEAST CABLE CO LTD

Flame-retardant power cable for wind power generation and preparation method thereof

The invention discloses a flame-retardant power cable for wind power generation and a preparation method thereof, and belongs to the technical field of power cables. The cable is composed of a conductor, an insulating layer and a protective sleeve which are sequentially arranged from inside to outside. Wherein the insulating layer is made of a mica tape, so that the flame retardant property of the cable can be enhanced to a certain extent; the protective sleeve material takes polypropylene as a matrix, so that the cable is endowed with excellent mechanical property and electrical insulation property; the material of the protective sleeve also contains nitrile rubber and a multi-effect flame retardant, wherein the nitrile rubber can enhance the low temperature resistance of the cable; various groups in molecules of the multi-effect flame retardant can achieve a synergistic effect, so that the flame-retardant smoke suppression performance and the anti-ultraviolet performance of the cable are remarkably enhanced, and the cable is stable in performance and not prone to falling off; therefore, the cable prepared by the invention is excellent in low temperature resistance and mechanical property, also has stable and efficient flame retardance, smoke suppression and ultraviolet resistance, is halogen-free and environment-friendly, and has important application value in the technical field of power cables.
Owner:ANHUI HUATONG CABLE GRP

Mica tape cross-linked polyethylene insulated cable

The invention relates to the technical field of cable processing, and discloses a mica tape cross-linked polyethylene insulated cable which comprises a copper conductor, a mica tape, a cross-linked polyethylene insulating layer, a filling material, a wrapping layer and a cable sheath from inside to outside, the mica tape comprises mica paper, a reinforcing material and an adhesive, and the adhesive comprises tung maleic anhydride type mica glue and MgO / gamma-Al2O3 composite filler. The adhesive adopted by the mica tape comprises the MgO / gamma-Al2O3 composite filler and the tung maleic anhydride type mica glue, and the MgO / gamma-Al2O3 composite filler can improve the heat conductivity coefficient and the dielectric property of the tung maleic anhydride type mica glue, so that the heat conductivity and the insulativity of the mica tape are improved.
Owner:HUBEI LISHENG POWER CABLE CO LTD

Wear-resistant moisture-proof cable

The invention discloses a wear-resistant moisture-proof cable. The wear-resistant moisture-proof cable comprises a cable inner core, a supporting seat and a cable outer core, the outer side of the cable inner core is connected with a cable outer core through a supporting seat, a limiting assembly is installed on the supporting seat, the limiting assembly comprises a first through groove formed in the supporting seat, a second through groove is formed in the supporting seat, a storage groove is formed in the side end of the supporting seat, a supporting block is installed in the storage groove, and the supporting block is connected with the cable outer core. The cable inner core is limited through cooperation of the first through groove and the second through groove of the limiting assembly. According to the wear-resistant moisture-proof cable, the outer sides of the cable inner cores are protected through the supporting seats, the short circuit problem caused by too close distance between the cable inner cores is reduced, the cable damage and aging problems caused by friction between the cable inner cores are reduced, the cable inner cores are limited through the supporting seats, later use of the cable is facilitated, and the service life of the cable is prolonged. And the problems of inconvenient wiring and signal crosstalk caused by movement of the cable inner core are reduced.
Owner:李灿

Preparation method of modified mica insulating material and production process of temperature-resistant mica tape

The invention belongs to the technical field of insulating materials, and relates to a preparation method of a modified mica insulating material and a temperature-resistant mica tape production process. -NH2 on the surface of the silane modified mica material is connected with interface amino groups between cyclic carbonate to obtain a hydroxyl polyurethane hybridized mica material, and the hydroxyl polyurethane hybridized mica material is prepared into the calcined mica paper. And starting from the polyester film, respectively obtaining a non-self-adhesive mica tape product and a self-adhesive mica tape product through two different preparation processes. The method comprises the following steps: 1, coating a polyester film with an adhesive, compounding the polyester film with modified calcined mica paper, drying, rolling and slitting to obtain a non-self-adhesive mica tape product; and 2, carrying out corona treatment on the back surface of the polyester film, coating a self-adhesive glue, drying, coating an adhesive, compounding with the modified calcined mica paper, drying, rolling and slitting to obtain the self-adhesive mica tape product. The modified mica tape has excellent insulating property in a high-temperature environment, and aging and decomposition phenomena of the mica layer can be effectively inhibited.
Owner:SHANGHAI TONGLI ELECTRICAL MATERIALS CO LTD

Shielded safety cable

The utility model discloses a shielded safety cable, which comprises a cable and a B1-level low-smoke halogen-free flame-retardant sheath extruded outside the cable, and is characterized by further comprising a copper wire braided shielding layer which is embedded in the B1-level low-smoke halogen-free flame-retardant sheath. According to the utility model, the copper wire braided shielding layer is embedded into the B1-level low-smoke halogen-free flame-retardant sheath, so that the copper wire braided shielding layer is not easy to slide, and meanwhile, the cable is formed by filling and twisting the four core wires and the five low-smoke halogen-free environment-friendly ropes, is of a symmetrical structure and is not easy to twist.
Owner:SHANGHAI CHANGSHUN ELEVATOR CABLE CO LTD

Production method of high-structural-strength insulated steel tape armored multi-core power cable

The invention discloses a production method of a high-structural-strength insulating steel tape armored multi-core power cable. The power cable comprises a conductor unit and an insulating layer from inside to outside, wherein the conductor unit is formed by twisting and pressing a conductor with a copper base material, the conductor unit is wrapped outside the conductor, the overlapping rate of the conductor unit is larger than or equal to 50%, and the insulating layer is formed by semi-conductive ceramic silicone rubber and / or crosslinked polyethylene. The double-layer wrapping tape is composed of ceramic silicone rubber filling strips and assists the insulating core wires to be twisted into a cable and is of a filling structure; an inner sheath made of a ceramic silicone rubber material; the composite armor layer is composed of an inner-layer galvanized steel band and an outer-layer stainless steel band; the buffer layer is composed of an aramid fiber woven mesh or a ceramic fiber belt; and the outer sheath is composed of ceramic silicone rubber or a low-smoke halogen-free flame-retardant material of which the oxygen index is greater than or equal to 40. The cable is high in structural strength, good in temperature resistance and high in impact resistance, high-temperature mechanical locking is achieved through tension-controlled double-layer reverse wrapping, and the performance of the cable is greatly improved.
Owner:HANGZHOU TONGCE WIRE & CABLE

Copper core special-shaped monofilament conductor power cable

The utility model discloses a copper core special-shaped monofilament conductor power cable, which comprises a cable conductor, the cable conductor comprises a circular monofilament, a plurality of first fan-shaped monofilaments, a plurality of second fan-shaped monofilaments and a plurality of third fan-shaped monofilaments, the first fan-shaped monofilaments are arranged on the outer side of the circular monofilament to form a first circular ring structure, and the second fan-shaped monofilaments are arranged on the outer side of the circular monofilament to form a second circular ring structure. The multiple second fan-shaped monofilaments are arranged on the outer side of the first circular ring structure to form a second circular ring structure, and the multiple third fan-shaped monofilaments are arranged on the outer side of the second circular ring structure to form a third circular ring structure. By changing the shape of the original circular monofilament, the situation that the resistivity of the monofilament is increased due to excessive deformation of the copper monofilament caused by extrusion is reduced; and meanwhile, through regular and tight arrangement and twisting during wire twisting, the compression coefficient of the conductor is improved, so that the direct-current resistance of the conductor is integrally reduced, and the current-carrying capacity and the operation safety of the cable are improved.
Owner:重庆科宝电缆股份有限公司

Flexible fireproof cable with staggered cooling channels

The invention relates to the technical field of fireproof cables, in particular to a flexible fireproof cable with staggered cooling runners, which comprises a fireproof cable body, and the fireproof cable body comprises a stranded copper conductor, a conductor insulator, a cabling, an argon arc welding corrugated copper sleeve and a halogen-free flame-retardant polyolefin outer sheath from inside to outside. And the outer side of the fireproof cable body is sleeved with an externally-hung monitoring flow guide device at the joint positions at the two ends. According to the flexible fireproof cable with the staggered cooling flow channel, conductor insulation is formed by a polyester belt, a double-sided synthetic mica belt and a conductor single-sided synthetic mica belt, and a cabling is formed by a halogen-free flame-retardant filling rope, a cabling single-sided synthetic mica belt and a halogen-free flame-retardant belt to form a flame-retardant material; the flame-retardant effect of the whole cable can be greatly enhanced, and secondary pollution is avoided; and an argon arc welding corrugated copper sleeve is arranged between the cabling and the halogen-free flame-retardant polyolefin outer sheath, so that the fireproof cable body has certain flexibility, and a serial cavity can be formed in the fireproof cable body.
Owner:FAR EAST CABLE +3

Mica composition, mica tube and preparation method and application thereof

The application relates to the technical field of insulating materials, and particularly discloses a mica material composition, a mica tube and a preparation method and application thereof. The mica material composition provided by the application comprises the following components in parts by weight: 75-85 parts of mica powder, 35-55 parts of polyethylene, 45-55 parts of silicon powder and 25-35 parts of organic silica gel; the application also provides a mica tube prepared by using the mica material composition, and a preparation method of the mica tube, which comprises the following steps: extruding the mica material composition at an extrusion temperature of 170-190 DEG C, and then air-cooling at 20-30 DEG C for greater than or equal to 20 min to obtain a mica tube preform; and through drying, the mica tube is obtained. The mica tube is prepared by extruding the mica material composition, the mica tube is seamless, the mica tube has good insulation at room temperature and good high-temperature fire resistance, and can meet the use requirements of an electric shock rod or a waterproof sleeve tube insulating layer.
Owner:BEIJING YITIAN MICA TECH CO LTD

Preparation method of mica insulating sheet without aluminum metal layer for lithium ion battery

The invention provides a preparation method of an aluminum-metal-layer-free mica insulating sheet for a lithium ion battery, and relates to the technical field of electric insulating materials and insulating component forming / manufacturing processes, the preparation method comprises the following steps: S1, providing a sheet-shaped mica base material, and preparing an organic silicon resin bonding system for impregnation; according to the preparation method of the mica insulating sheet without the aluminum metal layer for the lithium ion battery, a ceramic barrier system constructed by Si sol, Zr sol and titanium dioxide is adopted, and the ceramic barrier slurry is used for surface layering and comprises silica sol, zirconium oxide sol and titanium dioxide. The scheme that the prior art depends on an aluminum reflecting layer is avoided from the process path, so that the lithium ion battery insulation protection material meets the heat resistance and insulation requirements, meanwhile, aluminum-free treatment is achieved, and the application adaptability between battery cells and between the battery cells and the shell is improved.
Owner:FUJIAN YANZHUANG MATERIAL TECH CO LTD

Insulation laminate and method and device for producing an insulation laminate

The invention relates to an insulation laminate (10) with two layers (12) of a thermoplastic material (12A), each forming a polymer matrix, and an inner layer (14) of mica paper (14A) arranged between the two layers (12), as well as a method and a device for producing such an insulation laminate (10) and the use of such an insulation laminate (10).
Owner:AUDI AG

A high thermal conductivity multi-resin powder mica tape and preparation method thereof

The present invention discloses a high thermal conductivity multi-resin powder mica tape and its application, and the present invention relates to the manufacturing field of the insulation system of high-voltage motors and related materials thereof. The high thermal conductivity multi-resin powder mica tape is composited by a layer of powder mica paper, one or two layers of alkali-free glass cloth, an adhesive and an inorganic thermal conductive powder. The mass per unit area of ​​each component material is: 60 to 130 g / ㎡ of powder mica paper, 16 to 45 g / ㎡ of alkali-free glass cloth, 50 to 105 g / ㎡ of adhesive, and 20 to 50 g / ㎡ of inorganic thermal conductive powder. It is mainly used to prepare the main insulation of high-voltage motors. The main insulation prepared by the high thermal conductivity multi-resin powder mica tape of the present invention has a thermal conductivity of 0.40 to 0.55 W / (m·K), which is 60 to 100% higher than that of ordinary powder-free high-voltage motor main insulation, and its breakdown field strength and electrical life are at the same level as those of ordinary powder-free high-voltage motor main insulation.
Owner:SUZHOU JUFENG ELECTRICAL INSULATION SYST

A low-gum mica tape and a method for manufacturing the same

The application discloses a little-gum mica tape which is composed of a reinforcing material layer, a first adhesive layer, a mica paper layer and a second adhesive layer arranged in sequence, and a preparation method thereof. The reinforcing material is pulled through a mica tape machine, the first adhesive is coated on the surface of the reinforcing material, the mica paper is wound and combined with the reinforcing material after pre-baking, the combined material is baked in an oven, then the second adhesive is coated or sprayed on the surface of the mica paper to obtain a semi-finished product, and the semi-finished product is formed after baking in the oven, and the little-gum mica tape is prepared by winding and cutting. The application adds LNBR-820 to improve the poor adhesion between the mica tape layers and the problem that the mica paper and the reinforcing material are prone to delamination. The surface treatment is performed on the side of the mica paper which is not reinforced to solve the problem that the mica paper is prone to flying powder and falling off during the production and use, and the processability of the little-gum mica tape is improved.
Owner:WUHAN INSTITUTE OF MARINE ELECTRIC PROPULSION (THE 712TH RESEARCH INSTITUTE OF CHINA STATE SHIPBUILDING CORP LTD) +1

Coil manufacturing process using UV-transparent mica tapes for groundwall insulation

A method for electrically insulating a metallic conductor is provided, whereby the electrically insulating material represents an UV-curable insulation tape comprising a resin formulation, which at least comprises a thermoset resin and a dielectric insulator, both UV-transparent, as well as a photo-initiator. In this method, the UV-curable insulation tape is brought into a prepreg state prior to being applied to the metallic conductor. Once the prepreg UV-curable insulation tape is applied on the metallic conductor, it can be fully cured by using UV radiation. Due to the characteristics of the resin formulation, the method provided does not only allow insulating metallic conductors or providing groundwall insulation, it also allows for repairing pre-existing, yet damaged insulating material.
Owner:ABB (SCHWEIZ) AG

Flame-retardant shielding twisted-pair flat cable

The utility model discloses a flame-retardant shielding twisted-pair flat cable, which belongs to the technical field of cables and comprises a U-shaped separation framework, separation sheets are arranged on the U-shaped separation framework and divide the U-shaped separation framework into more than two accommodating grooves, the more than two accommodating grooves are linearly arranged, twisted-pair cores are accommodated in the accommodating grooves, and the twisted-pair cores are arranged in the U-shaped separation framework. A first shielding layer is arranged outside the U-shaped separation framework, a flame-retardant layer is arranged outside the first shielding layer, and a sheath layer is arranged outside the flame-retardant layer. According to the utility model, crosstalk coupling between line pairs is effectively reduced; anti-slip raised lines are arranged on the separation sheets, so that the sliding of the twisted-pair wire cores in the cable is reduced, and the stability of the twisted-pair wire cores is improved; the flame-retardant layer adopts the mica tape and has excellent high-temperature resistance and combustion resistance, so that the operation time of the cable at high temperature is prolonged, and the normal work of a circuit is ensured; and the rectangular flat cable is not easy to rotate, so that the transmission quality and the stability of signals can be improved.
Owner:JIANGSU JINQIAO CABLE CO LTD

Corona shielding strip for a high-voltage rotating electrical machine

Various embodiments of the teachings herein include a corona shielding tape for further processing to give an insulation system comprising an impregnated winding with potential control via outer corona shielding “AGS” and / or internal potential controller “IPS” and / or terminal corona shielding “EGS”, the insulation system being producible by impregnating the winding with an anhydride-free and resin-based impregnating agent at 45-85° C. and under reduced pressure. The corona shielding tape may include: a carrier tape; an electrically conductive and / or partly conductive filler in a polymer matrix; and a tape accelerator suitable for curing and / or gelation of the impregnating agent. The polymer matrix contains at least one polyvinylalcohol and / or a polyvinylalcohol copolymer. The accelerator is selected from the group consisting of: superacids and superacid salts suitable for acceleration of a cationic homopolymerization of the resin-based anhydride-free impregnating agent.
Owner:INNOMOTICS GMBH

High-flexibility cable for wind power generation

The utility model discloses a highly flexible cable for wind power generation, comprising an inner pp rope and an outer sheath, the periphery of the inner pp rope is provided with a cable core, the outer side of the inner pp rope is provided with a first spring, the outer side of the first spring is provided with a filling layer, the outer side of the cable core is provided with an insulating layer, the insulating layer is made of a PVC insulating material, and the outer sheath is provided with an outer sheath. According to the utility model, through the action of the first spring and the second spring in the cable, the cable can automatically recover after bending, so that the cable is not easy to deform, and the cable is not easy to deform, so that the cable is not easy to deform, and the service life of the cable is prolonged. A good high-temperature-resistant effect is achieved through the high-temperature-resistant layer, a good fireproof effect is achieved through the fireproof layer, the heat-resistant and flame-retardant performance of the cable is improved through the fiber layer, the cable has a waterproof effect through the waterproof layer, moisture is prevented from permeating the fireproof layer, and the fireproof effect of the cable is enhanced by coating the fireproof coating.
Owner:WUXI HUACHENG CABLE CO LTD

Silicone free fire safety wire construction

An electric wire is disclosed having a metal conductor, a first synthetic heat stable tape layer in direct contact with the metal conductor, wherein the first synthetic heat stable tape layer has a first edge and a second edge, wherein the first edge and the second edge are substantially parallel to one another, wherein the second edge overlaps the first edge by at least 180 degrees on a cross-sectional view, a second synthetic heat stable tape layer, wherein the second synthetic heat stable tape layer is helically wrapped around the first synthetic heat stable layer, a third synthetic heat stable tape layer, wherein the third synthetic heat stable tape layer is helically wrapped around the second synthetic heat stable layer, wherein electric wire contains no silicone, and an extruded layer, wherein the extruded layer is extruded over the second synthetic heat stable tape layer.
Owner:RADIX WIRE & CABLE LLC

A modified mica powder / resin composite insulating material and its preparation process and mica roll preparation process

The present invention relates to a modified mica powder / resin composite insulating material and a preparation process thereof and a mica roll preparation process. The present invention uses Joule heat technology to prepare Zr-Mg-Al oxide, which is named as insulating inorganic nanoparticles. The insulating inorganic nanoparticles prepared by the present invention have excellent electrical insulation performance, heat resistance and chemical stability. It is applied to the preparation of modified mica powder / resin composite insulating materials, which has excellent insulating effect. On the other hand, the present invention significantly improves the mechanical properties of the material by selecting a suitable silane coupling agent for reasonable modification treatment.
Owner:SHANGHAI TONGLI ELECTRICAL MATERIALS CO LTD

Fireproof coaxial cable

The present invention relates to a fireproof coaxial cable which is capable of stably maintaining a communication function for a predetermined period of time by being provided with an insulator that can maintain the shapes of an inner conductor and an outer conductor at a high temperature of 750°C or higher in the event of a fire. According to the present invention, the fireproof coaxial cable comprises: an inner conductor disposed in the center portion; an insulator transversely wound around the outside of the inner conductor; an outer conductor surrounding the outside of the insulator and forming a coaxial structure with the inner conductor; and a cable jacket surrounding the outside of the outer conductor, wherein the insulator includes an insulating core and a fireproof layer surrounding the insulating core, and the fireproof layer includes silicone rubber.
Owner:LS CABLE & SYST LTD

Adhesive for mica tape, preparation method thereof, and high-performance composite mica tape

The present invention relates to the technical field of adhesives for mica tapes, and in particular to an adhesive for mica tapes, a preparation method thereof, and a high-performance composite mica tape. The raw materials of the adhesive for mica tapes include: epoxy resin, organosilanol, α,ω-dihydroxypolydimethylsiloxane, a crosslinking agent, silicon carbide whiskers, nano-graphene oxide, boron nitride nanosheets, and dicyclohexylmethane diisocyanate. The present invention also discloses a high-performance composite mica tape, comprising: mica paper, an adhesive layer made of the adhesive adhered to one side of the mica paper, and a polyimide film adhered to one side of the adhesive layer. The present invention uses mica paper as a base material and bonds a polyimide film to form an insulating material, which has excellent heat resistance, mechanical properties, and electrical properties. In addition, the preparation method is simple and has a wide range of applications in the field of high-temperature resistant motors.
Owner:DANYANG WODLE ELECTRIC MATERIALS CO LTD

High-strength low-loss polyvinyl chloride power cable

The invention relates to the technical field of power cable manufacturing, and particularly discloses a high-strength low-loss polyvinyl chloride power cable. The high-strength and low-loss polyvinyl chloride power cable comprises a conductor layer, a reinforcing layer is arranged outside the conductor layer, an insulating inner layer is arranged outside the reinforcing layer, an insulating middle layer is arranged outside the insulating inner layer, an insulating outer layer is arranged outside the insulating middle layer, and the insulating outer layer is arranged outside the insulating middle layer. The insulating inner layer, the insulating middle layer and the insulating outer layer jointly form an insulating layer, and the reinforcing layer is formed by spirally winding stainless steel wires; the insulating outer layer is composed of polyvinyl chloride and nano silicon dioxide; the insulating middle layer is composed of polyvinyl chloride and mica powder; the insulating inner layer is composed of polyvinyl chloride and a plasticizer. The power cable can be used for occasions with requirements for mechanical strength, flexibility and long-term electrical stability, and has the comprehensive advantages of being high in mechanical strength, excellent in fatigue resistance, low in insulation loss, uniform in electric field distribution, good in long-term operation reliability and the like.
Owner:NANJING HUJU LONGPAN CABLE CO LTD

Flame-retardant power cable for wind power generation and preparation method thereof

The present invention discloses a flame-retardant power cable for wind power generation and a preparation method thereof, belonging to the technical field of power cables. It is composed of a conductor, an insulating layer and a protective sheath which are arranged in sequence from the inside to the outside. The insulating layer material is a mica tape, which can enhance the flame retardant performance of the cable to a certain extent; the protective sheath material is based on polypropylene, which gives the cable excellent mechanical properties and electrical insulation properties; the protective sheath material also contains nitrile rubber and a multi-effect flame retardant, wherein the nitrile rubber can enhance the low temperature resistance of the cable; wherein the various groups in the multi-effect flame retardant molecules can play a synergistic role, significantly enhancing the flame retardant, smoke suppression and UV resistance of the cable, and the performance is stable and not easy to fall off; therefore, the cable prepared by the present invention has excellent low temperature resistance and mechanical properties, and also has stable and efficient flame retardant, smoke suppression and UV resistance, and is halogen-free and environmentally friendly, and has important application value in the technical field of power cables.
Owner:ANHUI HUATONG CABLE GRP

Termite-resistant fire resistant power cable

The present application relates to the technical field of power cable, and discloses an ant termite fireproof power cable.The cable comprises a plurality of conductors wrapped with insulation layers to form an insulated core, a filling layer for covering the insulated core to form a round cable core, a conductor shielding layer for covering the filling layer, a mica tape fireproof layer for covering the conductor shielding layer, an ant termite fireproof assembly comprising a protection layer spirally wound outside the fireproof layer and an expansion strip embedded in the protection layer, a buffer layer for covering the ant termite fireproof assembly, a steel tape armoring layer for covering the buffer layer and an outer sheath for covering the steel tape armoring layer.The protection layer is formed by a plurality of fan-shaped retainers connected in an axial spiral manner, the retainers are provided with grooves for placing the expansion strips, and the outer walls of the retainers are provided with guide strips matched with guide grooves to realize stable connection.The expansion strips are expanded to fill the gaps and provide thermal insulation when a fire occurs, and the fireproof layer maintains insulation.The protection layer, the steel tape armoring layer and the outer sheath cooperate to realize ant termite prevention and structural stability, thereby ensuring the safety and reliability of the cable operation.
Owner:RUIYANG GRP NORTHEAST CABLE CO LTD

External corona protection and an electrical machine

The invention relates to an external corona shield comprising an insulation material or an insulation system, the layered electrically conductive insulation system, which comprises hydrophobic material wound in tape form, in which a PTFE-containing material is sandwiched between the inner outer corona shielding wrap (110) and outer corona protection material (200), wherein an electrically conductive insulation material, which has hydrophobic material forming a band and in which carbon is mixed into the hydrophobic material as an electrically conductive material.
Owner:SIEMENS ENERGY GLOBAL GMBH & CO KG

Drying equipment for mica tape production

The utility model provides drying equipment for mica tape production, and relates to the technical field of mica tape drying, the drying equipment for mica tape production comprises a plurality of connected drying parts, a mounting rack, a mounting groove, a support roller, a cover plate, an end cover and a bottom plate, the inner sides of the cover plate and the bottom plate are provided with torsion springs, the lower end of the bottom plate abuts against the mounting groove, and the support roller is arranged on the mounting groove. A through groove is formed in the middle of the cover plate, heating equipment is arranged in the through groove, a supporting frame is arranged on one side of the mounting frame, the bottom end of the air cylinder is rotationally connected with the supporting frame, and the output end of the air cylinder is rotationally connected with the cover plate. The cover plate can be opened by a certain angle through the air cylinder and is matched with the deflectable bottom plate, so that a wide unshielded operation area is formed between the cover plate and the mounting groove, a worker can conveniently pull the mica tape, the pulling efficiency of the mica tape is improved, and the use effect is good.
Owner:ZHEJIANG TIANRONG MATERIAL CO LTD

Cable with reinforced cable head

The utility model discloses a cable with a reinforced cable head, which relates to the technical field of power equipment and comprises a saturation section, the saturation section comprises inner core wires inside and an outer sheath layer outside, the inner core wires are arranged at the axis of the cable in a circumferential array, two ends of the saturation section are unfolded towards a plane to form joint sections, and the joint sections are connected with the outer sheath layer. The outer sheath layer is provided with a saturation section and a joint section, a conical transition section is formed between the saturation section and the joint section, the outer sheath layer is changed from a cylindrical shape at the saturation section to a flat shape at the joint section, and the upper surface and the lower surface of the outer sheath layer at the joint section are provided with reinforcing strip grooves. According to the utility model, the inner core wires are arranged on the outer sheath layer and are spread one by one, so that pressure damage to the inner core wires during connection of the protective sleeve is reduced, in addition, the protective layer III is arranged between the flat-mouth outer leather coat layer and the outer sheath layer, the effects of buffering and enhancing strength can be achieved, and the stability of the joint of the cable is further improved.
Owner:ZHEJIANG HANGFAN CABLE CO LTD